diff --git a/av1/av1_cx_iface.c b/av1/av1_cx_iface.c
index 71294cb..7a4c9aa 100644
--- a/av1/av1_cx_iface.c
+++ b/av1/av1_cx_iface.c
@@ -722,7 +722,7 @@
     ctx->cfg = *cfg;
     set_encoder_config(&ctx->oxcf, &ctx->cfg, &ctx->extra_cfg);
     // On profile change, request a key frame
-    force_key |= ctx->cpi->common.profile != ctx->oxcf.profile;
+    force_key |= ctx->cpi->common.seq_params.profile != ctx->oxcf.profile;
     av1_change_config(ctx->cpi, &ctx->oxcf);
   }
 
diff --git a/av1/av1_dx_iface.c b/av1/av1_dx_iface.c
index b21d0d1..f425720 100644
--- a/av1/av1_dx_iface.c
+++ b/av1/av1_dx_iface.c
@@ -1019,7 +1019,7 @@
       FrameWorkerData *const frame_worker_data =
           (FrameWorkerData *)worker->data1;
       const AV1_COMMON *const cm = &frame_worker_data->pbi->common;
-      *bit_depth = cm->bit_depth;
+      *bit_depth = cm->seq_params.bit_depth;
       return AOM_CODEC_OK;
     } else {
       return AOM_CODEC_ERROR;
@@ -1055,8 +1055,9 @@
           (FrameWorkerData *)worker->data1;
       const AV1_COMMON *const cm = &frame_worker_data->pbi->common;
 
-      *img_fmt = get_img_format(cm->subsampling_x, cm->subsampling_y,
-                                cm->use_highbitdepth);
+      *img_fmt = get_img_format(cm->seq_params.subsampling_x,
+                                cm->seq_params.subsampling_y,
+                                cm->seq_params.use_highbitdepth);
       return AOM_CODEC_OK;
     } else {
       return AOM_CODEC_ERROR;
diff --git a/av1/common/alloccommon.c b/av1/common/alloccommon.c
index 49902cc..1bf81c9 100644
--- a/av1/common/alloccommon.c
+++ b/av1/common/alloccommon.c
@@ -137,11 +137,11 @@
   // Now we need to allocate enough space to store the line buffers for the
   // stripes
   const int frame_w = cm->superres_upscaled_width;
-  const int use_highbd = cm->use_highbitdepth ? 1 : 0;
+  const int use_highbd = cm->seq_params.use_highbitdepth ? 1 : 0;
 
   for (int p = 0; p < num_planes; ++p) {
     const int is_uv = p > 0;
-    const int ss_x = is_uv && cm->subsampling_x;
+    const int ss_x = is_uv && cm->seq_params.subsampling_x;
     const int plane_w = ((frame_w + ss_x) >> ss_x) + 2 * RESTORATION_EXTRA_HORZ;
     const int stride = ALIGN_POWER_OF_TWO(plane_w, 5);
     const int buf_size = num_stripes * stride * RESTORATION_CTX_VERT
diff --git a/av1/common/av1_loopfilter.c b/av1/common/av1_loopfilter.c
index 738290f..9d68b87 100644
--- a/av1/common/av1_loopfilter.c
+++ b/av1/common/av1_loopfilter.c
@@ -1308,7 +1308,7 @@
   end <<= MI_SIZE_LOG2;
   uint8_t *ref0 = ref_buf;
   uint8_t *dst0 = dst_buf;
-  if (cm->use_highbitdepth) {
+  if (cm->seq_params.use_highbitdepth) {
     const uint16_t *ref16 = CONVERT_TO_SHORTPTR(ref_buf);
     const uint16_t *dst16 = CONVERT_TO_SHORTPTR(dst_buf);
     for (int j = 0; j < 4; ++j) {
@@ -1404,11 +1404,11 @@
       uint64_t mask_8x8_1 = (mask_8x8 >> shift_next) & mask_cutoff;
       uint64_t mask_4x4_1 = (mask_4x4 >> shift_next) & mask_cutoff;
 
-      if (cm->use_highbitdepth)
+      if (cm->seq_params.use_highbitdepth)
         highbd_filter_selectively_vert_row2(
             ssx, CONVERT_TO_SHORTPTR(dst->buf), dst->stride, pl, mask_16x16_0,
             mask_8x8_0, mask_4x4_0, mask_16x16_1, mask_8x8_1, mask_4x4_1,
-            &cm->lf_info, lfl, lfl2, (int)cm->bit_depth);
+            &cm->lf_info, lfl, lfl2, (int)cm->seq_params.bit_depth);
       else
         filter_selectively_vert_row2(ssx, dst->buf, dst->stride, pl,
                                      mask_16x16_0, mask_8x8_0, mask_4x4_0,
@@ -1474,10 +1474,11 @@
       mask_8x8 = (mask_8x8 >> shift) & mask_cutoff;
       mask_4x4 = (mask_4x4 >> shift) & mask_cutoff;
 
-      if (cm->use_highbitdepth)
-        highbd_filter_selectively_horiz(
-            CONVERT_TO_SHORTPTR(dst->buf), dst->stride, pl, ssx, mask_16x16,
-            mask_8x8, mask_4x4, &cm->lf_info, lfl, (int)cm->bit_depth);
+      if (cm->seq_params.use_highbitdepth)
+        highbd_filter_selectively_horiz(CONVERT_TO_SHORTPTR(dst->buf),
+                                        dst->stride, pl, ssx, mask_16x16,
+                                        mask_8x8, mask_4x4, &cm->lf_info, lfl,
+                                        (int)cm->seq_params.bit_depth);
       else
         filter_selectively_horiz(dst->buf, dst->stride, pl, ssx, mask_16x16,
                                  mask_8x8, mask_4x4, &cm->lf_info, lfl);
@@ -1652,6 +1653,8 @@
   const int dst_stride = plane_ptr->dst.stride;
   const int y_range = (MAX_MIB_SIZE >> scale_vert);
   const int x_range = (MAX_MIB_SIZE >> scale_horz);
+  const int use_highbitdepth = cm->seq_params.use_highbitdepth;
+  const aom_bit_depth_t bit_depth = cm->seq_params.bit_depth;
   for (int y = 0; y < y_range; y += row_step) {
     uint8_t *p = dst_ptr + y * MI_SIZE * dst_stride;
     for (int x = 0; x < x_range;) {
@@ -1677,40 +1680,40 @@
       switch (params.filter_length) {
         // apply 4-tap filtering
         case 4:
-          if (cm->use_highbitdepth)
+          if (use_highbitdepth)
             aom_highbd_lpf_vertical_4(CONVERT_TO_SHORTPTR(p), dst_stride,
                                       params.mblim, params.lim, params.hev_thr,
-                                      cm->bit_depth);
+                                      bit_depth);
           else
             aom_lpf_vertical_4(p, dst_stride, params.mblim, params.lim,
                                params.hev_thr);
           break;
         case 6:  // apply 6-tap filter for chroma plane only
           assert(plane != 0);
-          if (cm->use_highbitdepth)
+          if (use_highbitdepth)
             aom_highbd_lpf_vertical_6(CONVERT_TO_SHORTPTR(p), dst_stride,
                                       params.mblim, params.lim, params.hev_thr,
-                                      cm->bit_depth);
+                                      bit_depth);
           else
             aom_lpf_vertical_6(p, dst_stride, params.mblim, params.lim,
                                params.hev_thr);
           break;
         // apply 8-tap filtering
         case 8:
-          if (cm->use_highbitdepth)
+          if (use_highbitdepth)
             aom_highbd_lpf_vertical_8(CONVERT_TO_SHORTPTR(p), dst_stride,
                                       params.mblim, params.lim, params.hev_thr,
-                                      cm->bit_depth);
+                                      bit_depth);
           else
             aom_lpf_vertical_8(p, dst_stride, params.mblim, params.lim,
                                params.hev_thr);
           break;
         // apply 14-tap filtering
         case 14:
-          if (cm->use_highbitdepth)
+          if (use_highbitdepth)
             aom_highbd_lpf_vertical_14(CONVERT_TO_SHORTPTR(p), dst_stride,
                                        params.mblim, params.lim, params.hev_thr,
-                                       cm->bit_depth);
+                                       bit_depth);
           else
             aom_lpf_vertical_14(p, dst_stride, params.mblim, params.lim,
                                 params.hev_thr);
@@ -1737,6 +1740,8 @@
   const int dst_stride = plane_ptr->dst.stride;
   const int y_range = (MAX_MIB_SIZE >> scale_vert);
   const int x_range = (MAX_MIB_SIZE >> scale_horz);
+  const int use_highbitdepth = cm->seq_params.use_highbitdepth;
+  const aom_bit_depth_t bit_depth = cm->seq_params.bit_depth;
   for (int x = 0; x < x_range; x += col_step) {
     uint8_t *p = dst_ptr + x * MI_SIZE;
     for (int y = 0; y < y_range;) {
@@ -1762,10 +1767,10 @@
       switch (params.filter_length) {
         // apply 4-tap filtering
         case 4:
-          if (cm->use_highbitdepth)
+          if (use_highbitdepth)
             aom_highbd_lpf_horizontal_4(CONVERT_TO_SHORTPTR(p), dst_stride,
                                         params.mblim, params.lim,
-                                        params.hev_thr, cm->bit_depth);
+                                        params.hev_thr, bit_depth);
           else
             aom_lpf_horizontal_4(p, dst_stride, params.mblim, params.lim,
                                  params.hev_thr);
@@ -1773,30 +1778,30 @@
         // apply 6-tap filtering
         case 6:
           assert(plane != 0);
-          if (cm->use_highbitdepth)
+          if (use_highbitdepth)
             aom_highbd_lpf_horizontal_6(CONVERT_TO_SHORTPTR(p), dst_stride,
                                         params.mblim, params.lim,
-                                        params.hev_thr, cm->bit_depth);
+                                        params.hev_thr, bit_depth);
           else
             aom_lpf_horizontal_6(p, dst_stride, params.mblim, params.lim,
                                  params.hev_thr);
           break;
         // apply 8-tap filtering
         case 8:
-          if (cm->use_highbitdepth)
+          if (use_highbitdepth)
             aom_highbd_lpf_horizontal_8(CONVERT_TO_SHORTPTR(p), dst_stride,
                                         params.mblim, params.lim,
-                                        params.hev_thr, cm->bit_depth);
+                                        params.hev_thr, bit_depth);
           else
             aom_lpf_horizontal_8(p, dst_stride, params.mblim, params.lim,
                                  params.hev_thr);
           break;
         // apply 14-tap filtering
         case 14:
-          if (cm->use_highbitdepth)
+          if (use_highbitdepth)
             aom_highbd_lpf_horizontal_14(CONVERT_TO_SHORTPTR(p), dst_stride,
                                          params.mblim, params.lim,
-                                         params.hev_thr, cm->bit_depth);
+                                         params.hev_thr, bit_depth);
           else
             aom_lpf_horizontal_14(p, dst_stride, params.mblim, params.lim,
                                   params.hev_thr);
diff --git a/av1/common/cdef.c b/av1/common/cdef.c
index c9b9749..e9e2b0e 100644
--- a/av1/common/cdef.c
+++ b/av1/common/cdef.c
@@ -110,7 +110,7 @@
 static void copy_sb8_16(AOM_UNUSED AV1_COMMON *cm, uint16_t *dst, int dstride,
                         const uint8_t *src, int src_voffset, int src_hoffset,
                         int sstride, int vsize, int hsize) {
-  if (cm->use_highbitdepth) {
+  if (cm->seq_params.use_highbitdepth) {
     const uint16_t *base =
         &CONVERT_TO_SHORTPTR(src)[src_voffset * sstride + src_hoffset];
     copy_rect8_16bit_to_16bit(dst, dstride, base, sstride, vsize, hsize);
@@ -153,7 +153,7 @@
   int mi_high_l2[3];
   int xdec[3];
   int ydec[3];
-  int coeff_shift = AOMMAX(cm->bit_depth - 8, 0);
+  int coeff_shift = AOMMAX(cm->seq_params.bit_depth - 8, 0);
   const int nvfb = (cm->mi_rows + MI_SIZE_64X64 - 1) / MI_SIZE_64X64;
   const int nhfb = (cm->mi_cols + MI_SIZE_64X64 - 1) / MI_SIZE_64X64;
   av1_setup_dst_planes(xd->plane, cm->seq_params.sb_size, frame, 0, 0, 0,
@@ -363,7 +363,7 @@
                     vsize + 2 * CDEF_VBORDER, CDEF_HBORDER, CDEF_VERY_LARGE);
         }
 
-        if (cm->use_highbitdepth) {
+        if (cm->seq_params.use_highbitdepth) {
           cdef_filter_fb(
               NULL,
               &CONVERT_TO_SHORTPTR(
diff --git a/av1/common/cfl.c b/av1/common/cfl.c
index 3e46bf4..ccc59b4 100644
--- a/av1/common/cfl.c
+++ b/av1/common/cfl.c
@@ -15,14 +15,14 @@
 
 #include "config/av1_rtcd.h"
 
-void cfl_init(CFL_CTX *cfl, AV1_COMMON *cm) {
+void cfl_init(CFL_CTX *cfl, const SequenceHeader *seq_params) {
   assert(block_size_wide[CFL_MAX_BLOCK_SIZE] == CFL_BUF_LINE);
   assert(block_size_high[CFL_MAX_BLOCK_SIZE] == CFL_BUF_LINE);
 
   memset(&cfl->recon_buf_q3, 0, sizeof(cfl->recon_buf_q3));
   memset(&cfl->ac_buf_q3, 0, sizeof(cfl->ac_buf_q3));
-  cfl->subsampling_x = cm->subsampling_x;
-  cfl->subsampling_y = cm->subsampling_y;
+  cfl->subsampling_x = seq_params->subsampling_x;
+  cfl->subsampling_y = seq_params->subsampling_y;
   cfl->are_parameters_computed = 0;
   cfl->store_y = 0;
   // The DC_PRED cache is disabled by default and is only enabled in
diff --git a/av1/common/onyxc_int.h b/av1/common/onyxc_int.h
index f8d8e1f..32bffea 100644
--- a/av1/common/onyxc_int.h
+++ b/av1/common/onyxc_int.h
@@ -184,7 +184,10 @@
   uint8_t minor;
 } BitstreamLevel;
 
-/* Initial version of sequence header structure */
+// Sequence header structure.
+// Note: All syntax elements of sequence_header_obu that need to be
+// bit-identical across multiple sequence headers must be part of this struct,
+// so that consistency is checked by are_seq_headers_consistent() function.
 typedef struct SequenceHeader {
   int num_bits_width;
   int num_bits_height;
@@ -205,7 +208,6 @@
                                    // 2 - adaptive
   int still_picture;               // Video is a single frame still picture
   int reduced_still_picture_hdr;   // Use reduced header for still picture
-  int monochrome;                  // Monochorme video
   int enable_filter_intra;         // enables/disables filterintra
   int enable_intra_edge_filter;    // enables/disables corner/edge/upsampling
   int enable_interintra_compound;  // enables/disables interintra_compound
@@ -229,6 +231,9 @@
                            //     enabled for that frame.
   int enable_cdef;         // To turn on/off CDEF
   int enable_restoration;  // To turn on/off loop restoration
+  BITSTREAM_PROFILE profile;
+
+  // Operating point info.
   int operating_points_cnt_minus_1;
   int operating_point_idc[MAX_NUM_OPERATING_POINTS];
   int display_model_info_present_flag;
@@ -236,15 +241,24 @@
   BitstreamLevel level[MAX_NUM_OPERATING_POINTS];
   uint8_t tier[MAX_NUM_OPERATING_POINTS];  // seq_tier in the spec. One bit: 0
                                            // or 1.
+
+  // Color config.
+  aom_bit_depth_t bit_depth;  // AOM_BITS_8 in profile 0 or 1,
+                              // AOM_BITS_10 or AOM_BITS_12 in profile 2 or 3.
+  int use_highbitdepth;       // If true, we need to use 16bit frame buffers.
+  int monochrome;             // Monochorme video
+  aom_color_primaries_t color_primaries;
+  aom_transfer_characteristics_t transfer_characteristics;
+  aom_matrix_coefficients_t matrix_coefficients;
+  int color_range;
+  int subsampling_x;          // Chroma subsampling for x
+  int subsampling_y;          // Chroma subsampling for y
+  aom_chroma_sample_position_t chroma_sample_position;
+  int separate_uv_delta_q;
 } SequenceHeader;
 
 typedef struct AV1Common {
   struct aom_internal_error_info error;
-  aom_color_primaries_t color_primaries;
-  aom_transfer_characteristics_t transfer_characteristics;
-  aom_matrix_coefficients_t matrix_coefficients;
-  aom_chroma_sample_position_t chroma_sample_position;
-  int color_range;
   int width;
   int height;
   int render_width;
@@ -259,12 +273,6 @@
   aom_op_timing_info_t op_frame_timing[MAX_NUM_OPERATING_POINTS + 1];
   uint32_t frame_presentation_time;
 
-  // TODO(jkoleszar): this implies chroma ss right now, but could vary per
-  // plane. Revisit as part of the future change to YV12_BUFFER_CONFIG to
-  // support additional planes.
-  int subsampling_x;
-  int subsampling_y;
-
   int largest_tile_id;
   size_t largest_tile_size;
   int context_update_tile_id;
@@ -272,8 +280,6 @@
   // Scale of the current frame with respect to itself.
   struct scale_factors sf_identity;
 
-  // Marks if we need to use 16bit frame buffers (1: yes, 0: no).
-  int use_highbitdepth;
   YV12_BUFFER_CONFIG *frame_to_show;
   RefCntBuffer *prev_frame;
 
@@ -341,8 +347,6 @@
   int u_ac_delta_q;
   int v_ac_delta_q;
 
-  int separate_uv_delta_q;
-
   // The dequantizers below are true dequntizers used only in the
   // dequantization process.  They have the same coefficient
   // shift/scale as TX.
@@ -446,10 +450,7 @@
   unsigned int frame_offset;
 
   unsigned int current_video_frame;
-  BITSTREAM_PROFILE profile;
 
-  // AOM_BITS_8 in profile 0 or 1, AOM_BITS_10 or AOM_BITS_12 in profile 2 or 3.
-  aom_bit_depth_t bit_depth;
   aom_bit_depth_t dequant_bit_depth;  // bit_depth of current dequantizer
 
   int error_resilient_mode;
@@ -690,7 +691,7 @@
   return ALIGN_POWER_OF_TWO(cm->mi_rows, cm->seq_params.mib_size_log2);
 }
 
-void cfl_init(CFL_CTX *cfl, AV1_COMMON *cm);
+void cfl_init(CFL_CTX *cfl, const SequenceHeader *seq_params);
 
 static INLINE int av1_num_planes(const AV1_COMMON *cm) {
   return cm->seq_params.monochrome ? 1 : MAX_MB_PLANE;
@@ -733,7 +734,7 @@
   }
   xd->mi_stride = cm->mi_stride;
   xd->error_info = &cm->error;
-  cfl_init(&xd->cfl, cm);
+  cfl_init(&xd->cfl, &cm->seq_params);
 }
 
 static INLINE void set_skip_context(MACROBLOCKD *xd, int mi_row, int mi_col,
@@ -1067,15 +1068,16 @@
 
 static INLINE void av1_zero_above_context(AV1_COMMON *const cm, const MACROBLOCKD *xd,
   int mi_col_start, int mi_col_end, const int tile_row) {
+  const SequenceHeader *const seq_params = &cm->seq_params;
   const int num_planes = av1_num_planes(cm);
   const int width = mi_col_end - mi_col_start;
   const int aligned_width =
-    ALIGN_POWER_OF_TWO(width, cm->seq_params.mib_size_log2);
+    ALIGN_POWER_OF_TWO(width, seq_params->mib_size_log2);
 
   const int offset_y = mi_col_start;
   const int width_y = aligned_width;
-  const int offset_uv = offset_y >> cm->subsampling_x;
-  const int width_uv = width_y >> cm->subsampling_x;
+  const int offset_uv = offset_y >> seq_params->subsampling_x;
+  const int width_uv = width_y >> seq_params->subsampling_x;
 
   av1_zero_array(cm->above_context[0][tile_row] + offset_y, width_y);
   if (num_planes > 1) {
diff --git a/av1/common/resize.c b/av1/common/resize.c
index 17e6823..93d6229 100644
--- a/av1/common/resize.c
+++ b/av1/common/resize.c
@@ -1100,7 +1100,7 @@
                                 int src_stride, uint8_t *dst, int dst_stride,
                                 int plane, int rows) {
   const int is_uv = (plane > 0);
-  const int ss_x = is_uv && cm->subsampling_x;
+  const int ss_x = is_uv && cm->seq_params.subsampling_x;
   const int downscaled_plane_width = ROUND_POWER_OF_TWO(cm->width, ss_x);
   const int upscaled_plane_width =
       ROUND_POWER_OF_TWO(cm->superres_upscaled_width, ss_x);
@@ -1141,10 +1141,11 @@
     const int pad_left = (j == 0);
     const int pad_right = (j == cm->tile_cols - 1);
 
-    if (cm->use_highbitdepth)
-      highbd_upscale_normative_rect(
-          src_ptr, rows, src_width, src_stride, dst_ptr, rows, dst_width,
-          dst_stride, x_step_qn, x0_qn, pad_left, pad_right, cm->bit_depth);
+    if (cm->seq_params.use_highbitdepth)
+      highbd_upscale_normative_rect(src_ptr, rows, src_width, src_stride,
+                                    dst_ptr, rows, dst_width, dst_stride,
+                                    x_step_qn, x0_qn, pad_left, pad_right,
+                                    cm->seq_params.bit_depth);
     else
       upscale_normative_rect(src_ptr, rows, src_width, src_stride, dst_ptr,
                              rows, dst_width, dst_stride, x_step_qn, x0_qn,
@@ -1175,7 +1176,7 @@
   const int num_planes = av1_num_planes(cm);
   if (cm->width != unscaled->y_crop_width ||
       cm->height != unscaled->y_crop_height) {
-    av1_resize_and_extend_frame(unscaled, scaled, (int)cm->bit_depth,
+    av1_resize_and_extend_frame(unscaled, scaled, (int)cm->seq_params.bit_depth,
                                 num_planes);
     return scaled;
   } else {
@@ -1232,6 +1233,7 @@
 void av1_superres_upscale(AV1_COMMON *cm, BufferPool *const pool) {
   const int num_planes = av1_num_planes(cm);
   if (!av1_superres_scaled(cm)) return;
+  const SequenceHeader *const seq_params = &cm->seq_params;
 
   YV12_BUFFER_CONFIG copy_buffer;
   memset(&copy_buffer, 0, sizeof(copy_buffer));
@@ -1239,10 +1241,10 @@
   YV12_BUFFER_CONFIG *const frame_to_show = get_frame_new_buffer(cm);
 
   const int aligned_width = ALIGN_POWER_OF_TWO(cm->width, 3);
-  if (aom_alloc_frame_buffer(&copy_buffer, aligned_width, cm->height,
-                             cm->subsampling_x, cm->subsampling_y,
-                             cm->use_highbitdepth, AOM_BORDER_IN_PIXELS,
-                             cm->byte_alignment))
+  if (aom_alloc_frame_buffer(
+          &copy_buffer, aligned_width, cm->height, seq_params->subsampling_x,
+          seq_params->subsampling_y, seq_params->use_highbitdepth,
+          AOM_BORDER_IN_PIXELS, cm->byte_alignment))
     aom_internal_error(&cm->error, AOM_CODEC_MEM_ERROR,
                        "Failed to allocate copy buffer for superres upscaling");
 
@@ -1269,11 +1271,11 @@
           "Failed to free current frame buffer before superres upscaling");
 
     // aom_realloc_frame_buffer() leaves config data for frame_to_show intact
-    if (aom_realloc_frame_buffer(frame_to_show, cm->superres_upscaled_width,
-                                 cm->superres_upscaled_height,
-                                 cm->subsampling_x, cm->subsampling_y,
-                                 cm->use_highbitdepth, AOM_BORDER_IN_PIXELS,
-                                 cm->byte_alignment, fb, cb, cb_priv))
+    if (aom_realloc_frame_buffer(
+            frame_to_show, cm->superres_upscaled_width,
+            cm->superres_upscaled_height, seq_params->subsampling_x,
+            seq_params->subsampling_y, seq_params->use_highbitdepth,
+            AOM_BORDER_IN_PIXELS, cm->byte_alignment, fb, cb, cb_priv))
       aom_internal_error(
           &cm->error, AOM_CODEC_MEM_ERROR,
           "Failed to allocate current frame buffer for superres upscaling");
@@ -1283,10 +1285,11 @@
 
     // Don't use callbacks on the encoder.
     // aom_alloc_frame_buffer() clears the config data for frame_to_show
-    if (aom_alloc_frame_buffer(frame_to_show, cm->superres_upscaled_width,
-                               cm->superres_upscaled_height, cm->subsampling_x,
-                               cm->subsampling_y, cm->use_highbitdepth,
-                               AOM_BORDER_IN_PIXELS, cm->byte_alignment))
+    if (aom_alloc_frame_buffer(
+            frame_to_show, cm->superres_upscaled_width,
+            cm->superres_upscaled_height, seq_params->subsampling_x,
+            seq_params->subsampling_y, seq_params->use_highbitdepth,
+            AOM_BORDER_IN_PIXELS, cm->byte_alignment))
       aom_internal_error(
           &cm->error, AOM_CODEC_MEM_ERROR,
           "Failed to reallocate current frame buffer for superres upscaling");
diff --git a/av1/common/restoration.c b/av1/common/restoration.c
index 2972782..6329679 100644
--- a/av1/common/restoration.c
+++ b/av1/common/restoration.c
@@ -42,8 +42,8 @@
 AV1PixelRect av1_whole_frame_rect(const AV1_COMMON *cm, int is_uv) {
   AV1PixelRect rect;
 
-  int ss_x = is_uv && cm->subsampling_x;
-  int ss_y = is_uv && cm->subsampling_y;
+  int ss_x = is_uv && cm->seq_params.subsampling_x;
+  int ss_y = is_uv && cm->seq_params.subsampling_y;
 
   rect.top = 0;
   rect.bottom = ROUND_POWER_OF_TWO(cm->height, ss_y);
@@ -1146,16 +1146,17 @@
                                             YV12_BUFFER_CONFIG *frame,
                                             AV1_COMMON *cm, int optimized_lr,
                                             int num_planes) {
-  const int bit_depth = cm->bit_depth;
-  const int highbd = cm->use_highbitdepth;
+  const SequenceHeader *const seq_params = &cm->seq_params;
+  const int bit_depth = seq_params->bit_depth;
+  const int highbd = seq_params->use_highbitdepth;
   lr_ctxt->dst = &cm->rst_frame;
 
   const int frame_width = frame->crop_widths[0];
   const int frame_height = frame->crop_heights[0];
-  if (aom_realloc_frame_buffer(lr_ctxt->dst, frame_width, frame_height,
-                               cm->subsampling_x, cm->subsampling_y,
-                               cm->use_highbitdepth, AOM_BORDER_IN_PIXELS,
-                               cm->byte_alignment, NULL, NULL, NULL) < 0)
+  if (aom_realloc_frame_buffer(
+          lr_ctxt->dst, frame_width, frame_height, seq_params->subsampling_x,
+          seq_params->subsampling_y, highbd, AOM_BORDER_IN_PIXELS,
+          cm->byte_alignment, NULL, NULL, NULL) < 0)
     aom_internal_error(&cm->error, AOM_CODEC_MEM_ERROR,
                        "Failed to allocate restoration dst buffer");
 
@@ -1180,8 +1181,8 @@
                  highbd);
 
     lr_plane_ctxt->rsi = rsi;
-    lr_plane_ctxt->ss_x = is_uv && cm->subsampling_x;
-    lr_plane_ctxt->ss_y = is_uv && cm->subsampling_y;
+    lr_plane_ctxt->ss_x = is_uv && seq_params->subsampling_x;
+    lr_plane_ctxt->ss_y = is_uv && seq_params->subsampling_y;
     lr_plane_ctxt->highbd = highbd;
     lr_plane_ctxt->bit_depth = bit_depth;
     lr_plane_ctxt->data8 = frame->buffers[plane];
@@ -1337,7 +1338,7 @@
                                     int32_t *tmpbuf,
                                     RestorationLineBuffers *rlbs) {
   const int is_uv = plane > 0;
-  const int ss_y = is_uv && cm->subsampling_y;
+  const int ss_y = is_uv && cm->seq_params.subsampling_y;
 
   const RestorationInfo *rsi = &cm->rst_info[plane];
 
@@ -1383,8 +1384,8 @@
   const int vert_units = av1_lr_count_units_in_tile(size, tile_h);
 
   // The size of an MI-unit on this plane of the image
-  const int ss_x = is_uv && cm->subsampling_x;
-  const int ss_y = is_uv && cm->subsampling_y;
+  const int ss_x = is_uv && cm->seq_params.subsampling_x;
+  const int ss_y = is_uv && cm->seq_params.subsampling_y;
   const int mi_size_x = MI_SIZE >> ss_x;
   const int mi_size_y = MI_SIZE >> ss_y;
 
@@ -1465,7 +1466,7 @@
   int upscaled_width;
   int line_bytes;
   if (av1_superres_scaled(cm)) {
-    const int ss_x = is_uv && cm->subsampling_x;
+    const int ss_x = is_uv && cm->seq_params.subsampling_x;
     upscaled_width = (cm->superres_upscaled_width + ss_x) >> ss_x;
     line_bytes = upscaled_width << use_highbd;
     if (use_highbd)
@@ -1512,7 +1513,7 @@
   // At the point where this function is called, we've already applied
   // superres. So we don't need to extend the lines here, we can just
   // pull directly from the topmost row of the upscaled frame.
-  const int ss_x = is_uv && cm->subsampling_x;
+  const int ss_x = is_uv && cm->seq_params.subsampling_x;
   const int upscaled_width = av1_superres_scaled(cm)
                                  ? (cm->superres_upscaled_width + ss_x) >> ss_x
                                  : src_width;
@@ -1532,7 +1533,7 @@
                                          int use_highbd, int plane,
                                          AV1_COMMON *cm, int after_cdef) {
   const int is_uv = plane > 0;
-  const int ss_y = is_uv && cm->subsampling_y;
+  const int ss_y = is_uv && cm->seq_params.subsampling_y;
   const int stripe_height = RESTORATION_PROC_UNIT_SIZE >> ss_y;
   const int stripe_off = RESTORATION_UNIT_OFFSET >> ss_y;
 
@@ -1597,7 +1598,7 @@
 void av1_loop_restoration_save_boundary_lines(const YV12_BUFFER_CONFIG *frame,
                                               AV1_COMMON *cm, int after_cdef) {
   const int num_planes = av1_num_planes(cm);
-  const int use_highbd = cm->use_highbitdepth;
+  const int use_highbd = cm->seq_params.use_highbitdepth;
   for (int p = 0; p < num_planes; ++p) {
     save_tile_row_boundary_lines(frame, use_highbd, p, cm, after_cdef);
   }
diff --git a/av1/common/thread_common.c b/av1/common/thread_common.c
index 3fa998a..f9b734b 100644
--- a/av1/common/thread_common.c
+++ b/av1/common/thread_common.c
@@ -572,7 +572,7 @@
   for (int plane = 0; plane < num_planes; plane++) {
     if (cm->rst_info[plane].frame_restoration_type == RESTORE_NONE) continue;
     const int is_uv = plane > 0;
-    const int ss_y = is_uv && cm->subsampling_y;
+    const int ss_y = is_uv && cm->seq_params.subsampling_y;
 
     AV1PixelRect tile_rect = ctxt[plane].tile_rect;
     const int unit_size = ctxt[plane].rsi->restoration_unit_size;
diff --git a/av1/common/tile_common.c b/av1/common/tile_common.c
index 9a43ab2..026c904 100644
--- a/av1/common/tile_common.c
+++ b/av1/common/tile_common.c
@@ -179,8 +179,8 @@
   r.bottom = AOMMIN(r.bottom, frame_h);
 
   // Convert to coordinates in the appropriate plane
-  const int ss_x = is_uv && cm->subsampling_x;
-  const int ss_y = is_uv && cm->subsampling_y;
+  const int ss_x = is_uv && cm->seq_params.subsampling_x;
+  const int ss_y = is_uv && cm->seq_params.subsampling_y;
 
   r.left = ROUND_POWER_OF_TWO(r.left, ss_x);
   r.right = ROUND_POWER_OF_TWO(r.right, ss_x);
diff --git a/av1/decoder/decodeframe.c b/av1/decoder/decodeframe.c
index d286fbc..f2e93ba 100644
--- a/av1/decoder/decodeframe.c
+++ b/av1/decoder/decodeframe.c
@@ -84,15 +84,15 @@
 }
 
 // Use only_chroma = 1 to only set the chroma planes
-static void set_planes_to_neutral_grey(AV1_COMMON *const cm,
+static void set_planes_to_neutral_grey(const SequenceHeader *const seq_params,
                                        const YV12_BUFFER_CONFIG *const buf,
                                        int only_chroma) {
-  const int val = 1 << (cm->bit_depth - 1);
+  const int val = 1 << (seq_params->bit_depth - 1);
 
   for (int plane = only_chroma; plane < MAX_MB_PLANE; plane++) {
     const int is_uv = plane > 0;
     for (int row_idx = 0; row_idx < buf->crop_heights[is_uv]; row_idx++) {
-      if (cm->use_highbitdepth) {
+      if (seq_params->use_highbitdepth) {
         // TODO(yaowu): replace this with aom_memset16() for speed
         for (int col_idx = 0; col_idx < buf->crop_widths[is_uv]; col_idx++) {
           uint16_t *base = CONVERT_TO_SHORTPTR(buf->buffers[plane]);
@@ -368,6 +368,7 @@
                               int mi_row, int mi_col, aom_reader *r,
                               PARTITION_TYPE partition, BLOCK_SIZE bsize) {
   AV1_COMMON *const cm = &pbi->common;
+  const SequenceHeader *const seq_params = &cm->seq_params;
   const int bw = mi_size_wide[bsize];
   const int bh = mi_size_high[bsize];
   const int x_mis = AOMMIN(bw, cm->mi_cols - mi_col);
@@ -379,9 +380,11 @@
   set_offsets(cm, xd, bsize, mi_row, mi_col, bw, bh, x_mis, y_mis);
   xd->mi[0]->partition = partition;
   av1_read_mode_info(pbi, xd, mi_row, mi_col, r, x_mis, y_mis);
-  if (bsize >= BLOCK_8X8 && (cm->subsampling_x || cm->subsampling_y)) {
+  if (bsize >= BLOCK_8X8 &&
+      (seq_params->subsampling_x || seq_params->subsampling_y)) {
     const BLOCK_SIZE uv_subsize =
-        ss_size_lookup[bsize][cm->subsampling_x][cm->subsampling_y];
+        ss_size_lookup[bsize][seq_params->subsampling_x]
+                      [seq_params->subsampling_y];
     if (uv_subsize == BLOCK_INVALID)
       aom_internal_error(xd->error_info, AOM_CODEC_CORRUPT_FRAME,
                          "Invalid block size.");
@@ -1369,10 +1372,10 @@
                    : (j == 1 ? cm->u_dc_delta_q : cm->v_dc_delta_q);
         const int ac_delta_q =
             j == 0 ? 0 : (j == 1 ? cm->u_ac_delta_q : cm->v_ac_delta_q);
-        xd->plane[j].seg_dequant_QTX[i][0] =
-            av1_dc_quant_QTX(current_qindex, dc_delta_q, cm->bit_depth);
-        xd->plane[j].seg_dequant_QTX[i][1] =
-            av1_ac_quant_QTX(current_qindex, ac_delta_q, cm->bit_depth);
+        xd->plane[j].seg_dequant_QTX[i][0] = av1_dc_quant_QTX(
+            current_qindex, dc_delta_q, cm->seq_params.bit_depth);
+        xd->plane[j].seg_dequant_QTX[i][1] = av1_ac_quant_QTX(
+            current_qindex, ac_delta_q, cm->seq_params.bit_depth);
       }
     }
   }
@@ -1711,7 +1714,7 @@
   }
 
   if (num_planes > 1) {
-    int s = AOMMIN(cm->subsampling_x, cm->subsampling_y);
+    int s = AOMMIN(cm->seq_params.subsampling_x, cm->seq_params.subsampling_y);
     if (s && !chroma_none) {
       cm->rst_info[1].restoration_unit_size =
           cm->rst_info[0].restoration_unit_size >> (aom_rb_read_bit(rb) * s);
@@ -1933,12 +1936,13 @@
 
 static void setup_quantization(AV1_COMMON *const cm,
                                struct aom_read_bit_buffer *rb) {
+  const SequenceHeader *const seq_params = &cm->seq_params;
   const int num_planes = av1_num_planes(cm);
   cm->base_qindex = aom_rb_read_literal(rb, QINDEX_BITS);
   cm->y_dc_delta_q = read_delta_q(rb);
   if (num_planes > 1) {
     int diff_uv_delta = 0;
-    if (cm->separate_uv_delta_q) diff_uv_delta = aom_rb_read_bit(rb);
+    if (seq_params->separate_uv_delta_q) diff_uv_delta = aom_rb_read_bit(rb);
     cm->u_dc_delta_q = read_delta_q(rb);
     cm->u_ac_delta_q = read_delta_q(rb);
     if (diff_uv_delta) {
@@ -1949,12 +1953,12 @@
       cm->v_ac_delta_q = cm->u_ac_delta_q;
     }
   }
-  cm->dequant_bit_depth = cm->bit_depth;
+  cm->dequant_bit_depth = seq_params->bit_depth;
   cm->using_qmatrix = aom_rb_read_bit(rb);
   if (cm->using_qmatrix) {
     cm->qm_y = aom_rb_read_literal(rb, QM_LEVEL_BITS);
     cm->qm_u = aom_rb_read_literal(rb, QM_LEVEL_BITS);
-    if (!cm->separate_uv_delta_q)
+    if (!seq_params->separate_uv_delta_q)
       cm->qm_v = cm->qm_u;
     else
       cm->qm_v = aom_rb_read_literal(rb, QM_LEVEL_BITS);
@@ -1967,6 +1971,7 @@
 
 // Build y/uv dequant values based on segmentation.
 static void setup_segmentation_dequant(AV1_COMMON *const cm) {
+  const int bit_depth = cm->seq_params.bit_depth;
   const int using_qm = cm->using_qmatrix;
   // When segmentation is disabled, only the first value is used.  The
   // remaining are don't cares.
@@ -1974,16 +1979,16 @@
   for (int i = 0; i < max_segments; ++i) {
     const int qindex = av1_get_qindex(&cm->seg, i, cm->base_qindex);
     cm->y_dequant_QTX[i][0] =
-        av1_dc_quant_QTX(qindex, cm->y_dc_delta_q, cm->bit_depth);
-    cm->y_dequant_QTX[i][1] = av1_ac_quant_QTX(qindex, 0, cm->bit_depth);
+        av1_dc_quant_QTX(qindex, cm->y_dc_delta_q, bit_depth);
+    cm->y_dequant_QTX[i][1] = av1_ac_quant_QTX(qindex, 0, bit_depth);
     cm->u_dequant_QTX[i][0] =
-        av1_dc_quant_QTX(qindex, cm->u_dc_delta_q, cm->bit_depth);
+        av1_dc_quant_QTX(qindex, cm->u_dc_delta_q, bit_depth);
     cm->u_dequant_QTX[i][1] =
-        av1_ac_quant_QTX(qindex, cm->u_ac_delta_q, cm->bit_depth);
+        av1_ac_quant_QTX(qindex, cm->u_ac_delta_q, bit_depth);
     cm->v_dequant_QTX[i][0] =
-        av1_dc_quant_QTX(qindex, cm->v_dc_delta_q, cm->bit_depth);
+        av1_dc_quant_QTX(qindex, cm->v_dc_delta_q, bit_depth);
     cm->v_dequant_QTX[i][1] =
-        av1_ac_quant_QTX(qindex, cm->v_ac_delta_q, cm->bit_depth);
+        av1_ac_quant_QTX(qindex, cm->v_ac_delta_q, bit_depth);
     const int lossless = qindex == 0 && cm->y_dc_delta_q == 0 &&
                          cm->u_dc_delta_q == 0 && cm->u_ac_delta_q == 0 &&
                          cm->v_dc_delta_q == 0 && cm->v_ac_delta_q == 0;
@@ -2079,21 +2084,22 @@
 
 static void setup_frame_size(AV1_COMMON *cm, int frame_size_override_flag,
                              struct aom_read_bit_buffer *rb) {
+  const SequenceHeader *const seq_params = &cm->seq_params;
   int width, height;
   BufferPool *const pool = cm->buffer_pool;
 
   if (frame_size_override_flag) {
-    int num_bits_width = cm->seq_params.num_bits_width;
-    int num_bits_height = cm->seq_params.num_bits_height;
+    int num_bits_width = seq_params->num_bits_width;
+    int num_bits_height = seq_params->num_bits_height;
     av1_read_frame_size(rb, num_bits_width, num_bits_height, &width, &height);
-    if (width > cm->seq_params.max_frame_width ||
-        height > cm->seq_params.max_frame_height) {
+    if (width > seq_params->max_frame_width ||
+        height > seq_params->max_frame_height) {
       aom_internal_error(&cm->error, AOM_CODEC_CORRUPT_FRAME,
                          "Frame dimensions are larger than the maximum values");
     }
   } else {
-    width = cm->seq_params.max_frame_width;
-    height = cm->seq_params.max_frame_height;
+    width = seq_params->max_frame_width;
+    height = seq_params->max_frame_height;
   }
 
   setup_superres(cm, rb, &width, &height);
@@ -2102,8 +2108,9 @@
 
   lock_buffer_pool(pool);
   if (aom_realloc_frame_buffer(
-          get_frame_new_buffer(cm), cm->width, cm->height, cm->subsampling_x,
-          cm->subsampling_y, cm->use_highbitdepth, AOM_BORDER_IN_PIXELS,
+          get_frame_new_buffer(cm), cm->width, cm->height,
+          seq_params->subsampling_x, seq_params->subsampling_y,
+          seq_params->use_highbitdepth, AOM_BORDER_IN_PIXELS,
           cm->byte_alignment,
           &pool->frame_bufs[cm->new_fb_idx].raw_frame_buffer, pool->get_fb_cb,
           pool->cb_priv)) {
@@ -2113,18 +2120,22 @@
   }
   unlock_buffer_pool(pool);
 
-  pool->frame_bufs[cm->new_fb_idx].buf.subsampling_x = cm->subsampling_x;
-  pool->frame_bufs[cm->new_fb_idx].buf.subsampling_y = cm->subsampling_y;
-  pool->frame_bufs[cm->new_fb_idx].buf.bit_depth = (unsigned int)cm->bit_depth;
-  pool->frame_bufs[cm->new_fb_idx].buf.color_primaries = cm->color_primaries;
+  pool->frame_bufs[cm->new_fb_idx].buf.subsampling_x =
+      seq_params->subsampling_x;
+  pool->frame_bufs[cm->new_fb_idx].buf.subsampling_y =
+      seq_params->subsampling_y;
+  pool->frame_bufs[cm->new_fb_idx].buf.bit_depth =
+      (unsigned int)seq_params->bit_depth;
+  pool->frame_bufs[cm->new_fb_idx].buf.color_primaries =
+      seq_params->color_primaries;
   pool->frame_bufs[cm->new_fb_idx].buf.transfer_characteristics =
-      cm->transfer_characteristics;
+      seq_params->transfer_characteristics;
   pool->frame_bufs[cm->new_fb_idx].buf.matrix_coefficients =
-      cm->matrix_coefficients;
-  pool->frame_bufs[cm->new_fb_idx].buf.monochrome = cm->seq_params.monochrome;
+      seq_params->matrix_coefficients;
+  pool->frame_bufs[cm->new_fb_idx].buf.monochrome = seq_params->monochrome;
   pool->frame_bufs[cm->new_fb_idx].buf.chroma_sample_position =
-      cm->chroma_sample_position;
-  pool->frame_bufs[cm->new_fb_idx].buf.color_range = cm->color_range;
+      seq_params->chroma_sample_position;
+  pool->frame_bufs[cm->new_fb_idx].buf.color_range = seq_params->color_range;
   pool->frame_bufs[cm->new_fb_idx].buf.render_width = cm->render_width;
   pool->frame_bufs[cm->new_fb_idx].buf.render_height = cm->render_height;
 }
@@ -2162,9 +2173,10 @@
     }
   }
 
+  const SequenceHeader *const seq_params = &cm->seq_params;
   if (!found) {
-    int num_bits_width = cm->seq_params.num_bits_width;
-    int num_bits_height = cm->seq_params.num_bits_height;
+    int num_bits_width = seq_params->num_bits_width;
+    int num_bits_height = seq_params->num_bits_height;
 
     av1_read_frame_size(rb, num_bits_width, num_bits_height, &width, &height);
     setup_superres(cm, rb, &width, &height);
@@ -2189,18 +2201,19 @@
                        "Referenced frame has invalid size");
   for (int i = 0; i < INTER_REFS_PER_FRAME; ++i) {
     RefBuffer *const ref_frame = &cm->frame_refs[i];
-    if (!valid_ref_frame_img_fmt(ref_frame->buf->bit_depth,
-                                 ref_frame->buf->subsampling_x,
-                                 ref_frame->buf->subsampling_y, cm->bit_depth,
-                                 cm->subsampling_x, cm->subsampling_y))
+    if (!valid_ref_frame_img_fmt(
+            ref_frame->buf->bit_depth, ref_frame->buf->subsampling_x,
+            ref_frame->buf->subsampling_y, seq_params->bit_depth,
+            seq_params->subsampling_x, seq_params->subsampling_y))
       aom_internal_error(&cm->error, AOM_CODEC_CORRUPT_FRAME,
                          "Referenced frame has incompatible color format");
   }
 
   lock_buffer_pool(pool);
   if (aom_realloc_frame_buffer(
-          get_frame_new_buffer(cm), cm->width, cm->height, cm->subsampling_x,
-          cm->subsampling_y, cm->use_highbitdepth, AOM_BORDER_IN_PIXELS,
+          get_frame_new_buffer(cm), cm->width, cm->height,
+          seq_params->subsampling_x, seq_params->subsampling_y,
+          seq_params->use_highbitdepth, AOM_BORDER_IN_PIXELS,
           cm->byte_alignment,
           &pool->frame_bufs[cm->new_fb_idx].raw_frame_buffer, pool->get_fb_cb,
           pool->cb_priv)) {
@@ -2210,18 +2223,22 @@
   }
   unlock_buffer_pool(pool);
 
-  pool->frame_bufs[cm->new_fb_idx].buf.subsampling_x = cm->subsampling_x;
-  pool->frame_bufs[cm->new_fb_idx].buf.subsampling_y = cm->subsampling_y;
-  pool->frame_bufs[cm->new_fb_idx].buf.bit_depth = (unsigned int)cm->bit_depth;
-  pool->frame_bufs[cm->new_fb_idx].buf.color_primaries = cm->color_primaries;
+  pool->frame_bufs[cm->new_fb_idx].buf.subsampling_x =
+      seq_params->subsampling_x;
+  pool->frame_bufs[cm->new_fb_idx].buf.subsampling_y =
+      seq_params->subsampling_y;
+  pool->frame_bufs[cm->new_fb_idx].buf.bit_depth =
+      (unsigned int)seq_params->bit_depth;
+  pool->frame_bufs[cm->new_fb_idx].buf.color_primaries =
+      seq_params->color_primaries;
   pool->frame_bufs[cm->new_fb_idx].buf.transfer_characteristics =
-      cm->transfer_characteristics;
+      seq_params->transfer_characteristics;
   pool->frame_bufs[cm->new_fb_idx].buf.matrix_coefficients =
-      cm->matrix_coefficients;
-  pool->frame_bufs[cm->new_fb_idx].buf.monochrome = cm->seq_params.monochrome;
+      seq_params->matrix_coefficients;
+  pool->frame_bufs[cm->new_fb_idx].buf.monochrome = seq_params->monochrome;
   pool->frame_bufs[cm->new_fb_idx].buf.chroma_sample_position =
-      cm->chroma_sample_position;
-  pool->frame_bufs[cm->new_fb_idx].buf.color_range = cm->color_range;
+      seq_params->chroma_sample_position;
+  pool->frame_bufs[cm->new_fb_idx].buf.color_range = seq_params->color_range;
   pool->frame_bufs[cm->new_fb_idx].buf.render_width = cm->render_width;
   pool->frame_bufs[cm->new_fb_idx].buf.render_height = cm->render_height;
 }
@@ -3487,7 +3504,7 @@
       thread_data->error_info.setjmp = 0;
     }
   }
-  const int use_highbd = cm->use_highbitdepth ? 1 : 0;
+  const int use_highbd = cm->seq_params.use_highbitdepth ? 1 : 0;
   const int buf_size = MC_TEMP_BUF_PELS << use_highbd;
   for (worker_idx = 0; worker_idx < pbi->max_threads - 1; ++worker_idx) {
     DecWorkerData *const thread_data = pbi->thread_data + worker_idx;
@@ -3813,17 +3830,20 @@
 }
 
 // Reads the high_bitdepth and twelve_bit fields in color_config() and sets
-// cm->bit_depth based on the values of those fields and cm->profile. Reports
-// errors by calling rb->error_handler() or aom_internal_error().
-static void av1_read_bitdepth(AV1_COMMON *cm, struct aom_read_bit_buffer *rb) {
+// seq_params->bit_depth based on the values of those fields and
+// seq_params->profile. Reports errors by calling rb->error_handler() or
+// aom_internal_error().
+static void read_bitdepth(struct aom_read_bit_buffer *rb,
+                          SequenceHeader *seq_params,
+                          struct aom_internal_error_info *error_info) {
   const int high_bitdepth = aom_rb_read_bit(rb);
-  if (cm->profile == PROFILE_2 && high_bitdepth) {
+  if (seq_params->profile == PROFILE_2 && high_bitdepth) {
     const int twelve_bit = aom_rb_read_bit(rb);
-    cm->bit_depth = twelve_bit ? AOM_BITS_12 : AOM_BITS_10;
-  } else if (cm->profile <= PROFILE_2) {
-    cm->bit_depth = high_bitdepth ? AOM_BITS_10 : AOM_BITS_8;
+    seq_params->bit_depth = twelve_bit ? AOM_BITS_12 : AOM_BITS_10;
+  } else if (seq_params->profile <= PROFILE_2) {
+    seq_params->bit_depth = high_bitdepth ? AOM_BITS_10 : AOM_BITS_8;
   } else {
-    aom_internal_error(&cm->error, AOM_CODEC_UNSUP_BITSTREAM,
+    aom_internal_error(error_info, AOM_CODEC_UNSUP_BITSTREAM,
                        "Unsupported profile/bit-depth combination");
   }
 }
@@ -3831,6 +3851,7 @@
 void av1_read_film_grain_params(AV1_COMMON *cm,
                                 struct aom_read_bit_buffer *rb) {
   aom_film_grain_t *pars = &cm->film_grain_params;
+  const SequenceHeader *const seq_params = &cm->seq_params;
 
   pars->apply_grain = aom_rb_read_bit(rb);
   if (!pars->apply_grain) {
@@ -3844,7 +3865,7 @@
   else
     pars->update_parameters = 1;
 
-  pars->bit_depth = cm->bit_depth;
+  pars->bit_depth = seq_params->bit_depth;
 
   if (!pars->update_parameters) {
     // inherit parameters from a previous reference frame
@@ -3880,11 +3901,11 @@
     pars->scaling_points_y[i][1] = aom_rb_read_literal(rb, 8);
   }
 
-  if (!cm->seq_params.monochrome)
+  if (!seq_params->monochrome)
     pars->chroma_scaling_from_luma = aom_rb_read_bit(rb);
 
-  if (cm->seq_params.monochrome || pars->chroma_scaling_from_luma ||
-      ((cm->subsampling_x == 1) && (cm->subsampling_y == 1) &&
+  if (seq_params->monochrome || pars->chroma_scaling_from_luma ||
+      ((seq_params->subsampling_x == 1) && (seq_params->subsampling_y == 1) &&
        (pars->num_y_points == 0))) {
     pars->num_cb_points = 0;
     pars->num_cr_points = 0;
@@ -3919,7 +3940,7 @@
       pars->scaling_points_cr[i][1] = aom_rb_read_literal(rb, 8);
     }
 
-    if ((cm->subsampling_x == 1) && (cm->subsampling_y == 1) &&
+    if ((seq_params->subsampling_x == 1) && (seq_params->subsampling_y == 1) &&
         (((pars->num_cb_points == 0) && (pars->num_cr_points != 0)) ||
          ((pars->num_cb_points != 0) && (pars->num_cr_points == 0))))
       aom_internal_error(&cm->error, AOM_CODEC_UNSUP_BITSTREAM,
@@ -3978,84 +3999,87 @@
   } else {
     memset(&cm->film_grain_params, 0, sizeof(cm->film_grain_params));
   }
-  cm->film_grain_params.bit_depth = cm->bit_depth;
+  cm->film_grain_params.bit_depth = cm->seq_params.bit_depth;
   memcpy(&cm->cur_frame->film_grain_params, &cm->film_grain_params,
          sizeof(aom_film_grain_t));
 }
 
-void av1_read_color_config(AV1_COMMON *cm, struct aom_read_bit_buffer *rb,
-                           int allow_lowbitdepth, SequenceHeader *seq_params) {
-  av1_read_bitdepth(cm, rb);
+void av1_read_color_config(struct aom_read_bit_buffer *rb,
+                           int allow_lowbitdepth, SequenceHeader *seq_params,
+                           struct aom_internal_error_info *error_info) {
+  read_bitdepth(rb, seq_params, error_info);
 
-  cm->use_highbitdepth = cm->bit_depth > AOM_BITS_8 || !allow_lowbitdepth;
+  seq_params->use_highbitdepth =
+      seq_params->bit_depth > AOM_BITS_8 || !allow_lowbitdepth;
   // monochrome bit (not needed for PROFILE_1)
-  const int is_monochrome = cm->profile != PROFILE_1 ? aom_rb_read_bit(rb) : 0;
+  const int is_monochrome =
+      seq_params->profile != PROFILE_1 ? aom_rb_read_bit(rb) : 0;
   seq_params->monochrome = is_monochrome;
   int color_description_present_flag = aom_rb_read_bit(rb);
   if (color_description_present_flag) {
-    cm->color_primaries = aom_rb_read_literal(rb, 8);
-    cm->transfer_characteristics = aom_rb_read_literal(rb, 8);
-    cm->matrix_coefficients = aom_rb_read_literal(rb, 8);
+    seq_params->color_primaries = aom_rb_read_literal(rb, 8);
+    seq_params->transfer_characteristics = aom_rb_read_literal(rb, 8);
+    seq_params->matrix_coefficients = aom_rb_read_literal(rb, 8);
   } else {
-    cm->color_primaries = AOM_CICP_CP_UNSPECIFIED;
-    cm->transfer_characteristics = AOM_CICP_TC_UNSPECIFIED;
-    cm->matrix_coefficients = AOM_CICP_MC_UNSPECIFIED;
+    seq_params->color_primaries = AOM_CICP_CP_UNSPECIFIED;
+    seq_params->transfer_characteristics = AOM_CICP_TC_UNSPECIFIED;
+    seq_params->matrix_coefficients = AOM_CICP_MC_UNSPECIFIED;
   }
   if (is_monochrome) {
     // [16,235] (including xvycc) vs [0,255] range
-    cm->color_range = aom_rb_read_bit(rb);
-    cm->subsampling_y = cm->subsampling_x = 1;
-    cm->chroma_sample_position = AOM_CSP_UNKNOWN;
-    cm->separate_uv_delta_q = 0;
+    seq_params->color_range = aom_rb_read_bit(rb);
+    seq_params->subsampling_y = seq_params->subsampling_x = 1;
+    seq_params->chroma_sample_position = AOM_CSP_UNKNOWN;
+    seq_params->separate_uv_delta_q = 0;
     return;
   }
-  if (cm->color_primaries == AOM_CICP_CP_BT_709 &&
-      cm->transfer_characteristics == AOM_CICP_TC_SRGB &&
-      cm->matrix_coefficients == AOM_CICP_MC_IDENTITY) {  // it would be better
-                                                          // to remove this
-                                                          // dependency too
-    cm->subsampling_y = cm->subsampling_x = 0;
-    cm->color_range = 1;  // assume full color-range
-    if (!(cm->profile == PROFILE_1 ||
-          (cm->profile == PROFILE_2 && cm->bit_depth == AOM_BITS_12))) {
+  if (seq_params->color_primaries == AOM_CICP_CP_BT_709 &&
+      seq_params->transfer_characteristics == AOM_CICP_TC_SRGB &&
+      seq_params->matrix_coefficients == AOM_CICP_MC_IDENTITY) {
+    // It would be good to remove this dependency.
+    seq_params->subsampling_y = seq_params->subsampling_x = 0;
+    seq_params->color_range = 1;  // assume full color-range
+    if (!(seq_params->profile == PROFILE_1 ||
+          (seq_params->profile == PROFILE_2 &&
+           seq_params->bit_depth == AOM_BITS_12))) {
       aom_internal_error(
-          &cm->error, AOM_CODEC_UNSUP_BITSTREAM,
+          error_info, AOM_CODEC_UNSUP_BITSTREAM,
           "sRGB colorspace not compatible with specified profile");
     }
   } else {
     // [16,235] (including xvycc) vs [0,255] range
-    cm->color_range = aom_rb_read_bit(rb);
-    if (cm->profile == PROFILE_0) {
+    seq_params->color_range = aom_rb_read_bit(rb);
+    if (seq_params->profile == PROFILE_0) {
       // 420 only
-      cm->subsampling_x = cm->subsampling_y = 1;
-    } else if (cm->profile == PROFILE_1) {
+      seq_params->subsampling_x = seq_params->subsampling_y = 1;
+    } else if (seq_params->profile == PROFILE_1) {
       // 444 only
-      cm->subsampling_x = cm->subsampling_y = 0;
+      seq_params->subsampling_x = seq_params->subsampling_y = 0;
     } else {
-      assert(cm->profile == PROFILE_2);
-      if (cm->bit_depth == AOM_BITS_12) {
-        cm->subsampling_x = aom_rb_read_bit(rb);
-        if (cm->subsampling_x)
-          cm->subsampling_y = aom_rb_read_bit(rb);  // 422 or 420
+      assert(seq_params->profile == PROFILE_2);
+      if (seq_params->bit_depth == AOM_BITS_12) {
+        seq_params->subsampling_x = aom_rb_read_bit(rb);
+        if (seq_params->subsampling_x)
+          seq_params->subsampling_y = aom_rb_read_bit(rb);  // 422 or 420
         else
-          cm->subsampling_y = 0;  // 444
+          seq_params->subsampling_y = 0;  // 444
       } else {
         // 422
-        cm->subsampling_x = 1;
-        cm->subsampling_y = 0;
+        seq_params->subsampling_x = 1;
+        seq_params->subsampling_y = 0;
       }
     }
-    if (cm->matrix_coefficients == AOM_CICP_MC_IDENTITY &&
-        (cm->subsampling_x || cm->subsampling_y)) {
+    if (seq_params->matrix_coefficients == AOM_CICP_MC_IDENTITY &&
+        (seq_params->subsampling_x || seq_params->subsampling_y)) {
       aom_internal_error(
-          &cm->error, AOM_CODEC_UNSUP_BITSTREAM,
+          error_info, AOM_CODEC_UNSUP_BITSTREAM,
           "Identity CICP Matrix incompatible with non 4:4:4 color sampling");
     }
-    if (cm->subsampling_x && cm->subsampling_y) {
-      cm->chroma_sample_position = aom_rb_read_literal(rb, 2);
+    if (seq_params->subsampling_x && seq_params->subsampling_y) {
+      seq_params->chroma_sample_position = aom_rb_read_literal(rb, 2);
     }
   }
-  cm->separate_uv_delta_q = aom_rb_read_bit(rb);
+  seq_params->separate_uv_delta_q = aom_rb_read_bit(rb);
 }
 
 void av1_read_timing_info_header(AV1_COMMON *cm,
@@ -4390,6 +4414,7 @@
 static int read_uncompressed_header(AV1Decoder *pbi,
                                     struct aom_read_bit_buffer *rb) {
   AV1_COMMON *const cm = &pbi->common;
+  const SequenceHeader *const seq_params = &cm->seq_params;
   MACROBLOCKD *const xd = &pbi->mb;
   BufferPool *const pool = cm->buffer_pool;
   RefCntBuffer *const frame_bufs = pool->frame_bufs;
@@ -4405,7 +4430,7 @@
   // NOTE: By default all coded frames to be used as a reference
   cm->is_reference_frame = 1;
 
-  if (cm->seq_params.reduced_still_picture_hdr) {
+  if (seq_params->reduced_still_picture_hdr) {
     cm->show_existing_frame = 0;
     cm->show_frame = 1;
     cm->frame_type = KEY_FRAME;
@@ -4418,12 +4443,12 @@
       // Show an existing frame directly.
       const int existing_frame_idx = aom_rb_read_literal(rb, 3);
       const int frame_to_show = cm->ref_frame_map[existing_frame_idx];
-      if (cm->seq_params.decoder_model_info_present_flag &&
+      if (seq_params->decoder_model_info_present_flag &&
           cm->timing_info.equal_picture_interval == 0) {
         av1_read_temporal_point_info(cm, rb);
       }
-      if (cm->seq_params.frame_id_numbers_present_flag) {
-        int frame_id_length = cm->seq_params.frame_id_length;
+      if (seq_params->frame_id_numbers_present_flag) {
+        int frame_id_length = seq_params->frame_id_length;
         int display_frame_id = aom_rb_read_literal(rb, frame_id_length);
         /* Compare display_frame_id with ref_frame_id and check valid for
          * referencing */
@@ -4466,14 +4491,14 @@
 
     cm->frame_type = (FRAME_TYPE)aom_rb_read_literal(rb, 2);  // 2 bits
     cm->show_frame = aom_rb_read_bit(rb);
-    if (cm->seq_params.still_picture &&
+    if (seq_params->still_picture &&
         (cm->frame_type != KEY_FRAME || !cm->show_frame)) {
       aom_internal_error(&cm->error, AOM_CODEC_CORRUPT_FRAME,
                          "Still pictures must be coded as shown keyframes");
     }
     cm->showable_frame = cm->frame_type != KEY_FRAME;
     if (cm->show_frame) {
-      if (cm->seq_params.decoder_model_info_present_flag &&
+      if (seq_params->decoder_model_info_present_flag &&
           cm->timing_info.equal_picture_interval == 0)
         av1_read_temporal_point_info(cm, rb);
     } else {
@@ -4489,17 +4514,17 @@
   }
 
   cm->disable_cdf_update = aom_rb_read_bit(rb);
-  if (cm->seq_params.force_screen_content_tools == 2) {
+  if (seq_params->force_screen_content_tools == 2) {
     cm->allow_screen_content_tools = aom_rb_read_bit(rb);
   } else {
-    cm->allow_screen_content_tools = cm->seq_params.force_screen_content_tools;
+    cm->allow_screen_content_tools = seq_params->force_screen_content_tools;
   }
 
   if (cm->allow_screen_content_tools) {
-    if (cm->seq_params.force_integer_mv == 2) {
+    if (seq_params->force_integer_mv == 2) {
       cm->cur_frame_force_integer_mv = aom_rb_read_bit(rb);
     } else {
-      cm->cur_frame_force_integer_mv = cm->seq_params.force_integer_mv;
+      cm->cur_frame_force_integer_mv = seq_params->force_integer_mv;
     }
   } else {
     cm->cur_frame_force_integer_mv = 0;
@@ -4510,10 +4535,10 @@
   cm->allow_intrabc = 0;
   cm->primary_ref_frame = PRIMARY_REF_NONE;
 
-  if (!cm->seq_params.reduced_still_picture_hdr) {
-    if (cm->seq_params.frame_id_numbers_present_flag) {
-      int frame_id_length = cm->seq_params.frame_id_length;
-      int diff_len = cm->seq_params.delta_frame_id_length;
+  if (!seq_params->reduced_still_picture_hdr) {
+    if (seq_params->frame_id_numbers_present_flag) {
+      int frame_id_length = seq_params->frame_id_length;
+      int diff_len = seq_params->delta_frame_id_length;
       int prev_frame_id = 0;
       int have_prev_frame_id = !pbi->decoding_first_frame &&
                                !(cm->frame_type == KEY_FRAME && cm->show_frame);
@@ -4558,7 +4583,7 @@
         frame_is_sframe(cm) ? 1 : aom_rb_read_literal(rb, 1);
 
     cm->frame_offset =
-        aom_rb_read_literal(rb, cm->seq_params.order_hint_bits_minus_1 + 1);
+        aom_rb_read_literal(rb, seq_params->order_hint_bits_minus_1 + 1);
     cm->current_video_frame = cm->frame_offset;
 
     if (!cm->error_resilient_mode && !frame_is_intra_only(cm)) {
@@ -4566,19 +4591,19 @@
     }
   }
 
-  if (cm->seq_params.decoder_model_info_present_flag) {
+  if (seq_params->decoder_model_info_present_flag) {
     cm->buffer_removal_time_present = aom_rb_read_bit(rb);
     if (cm->buffer_removal_time_present) {
       for (int op_num = 0;
-           op_num < cm->seq_params.operating_points_cnt_minus_1 + 1; op_num++) {
+           op_num < seq_params->operating_points_cnt_minus_1 + 1; op_num++) {
         if (cm->op_params[op_num].decoder_model_param_present_flag) {
-          if ((((cm->seq_params.operating_point_idc[op_num] >>
+          if ((((seq_params->operating_point_idc[op_num] >>
                  cm->temporal_layer_id) &
                 0x1) &&
-               ((cm->seq_params.operating_point_idc[op_num] >>
+               ((seq_params->operating_point_idc[op_num] >>
                  (cm->spatial_layer_id + 8)) &
                 0x1)) ||
-              cm->seq_params.operating_point_idc[op_num] == 0) {
+              seq_params->operating_point_idc[op_num] == 0) {
             cm->op_frame_timing[op_num].buffer_removal_time =
                 aom_rb_read_unsigned_literal(
                     rb, cm->buffer_model.buffer_removal_time_length);
@@ -4629,11 +4654,11 @@
 
   if (!frame_is_intra_only(cm) || pbi->refresh_frame_flags != 0xFF) {
     // Read all ref frame order hints if error_resilient_mode == 1
-    if (cm->error_resilient_mode && cm->seq_params.enable_order_hint) {
+    if (cm->error_resilient_mode && seq_params->enable_order_hint) {
       for (int ref_idx = 0; ref_idx < REF_FRAMES; ref_idx++) {
         // Read order hint from bit stream
         unsigned int frame_offset =
-            aom_rb_read_literal(rb, cm->seq_params.order_hint_bits_minus_1 + 1);
+            aom_rb_read_literal(rb, seq_params->order_hint_bits_minus_1 + 1);
         // Get buffer index
         int buf_idx = cm->ref_frame_map[ref_idx];
         assert(buf_idx < FRAME_BUFFERS);
@@ -4653,10 +4678,10 @@
           }
           lock_buffer_pool(pool);
           if (aom_realloc_frame_buffer(
-                  &frame_bufs[buf_idx].buf, cm->seq_params.max_frame_width,
-                  cm->seq_params.max_frame_height, cm->subsampling_x,
-                  cm->subsampling_y, cm->use_highbitdepth, AOM_BORDER_IN_PIXELS,
-                  cm->byte_alignment,
+                  &frame_bufs[buf_idx].buf, seq_params->max_frame_width,
+                  seq_params->max_frame_height, seq_params->subsampling_x,
+                  seq_params->subsampling_y, seq_params->use_highbitdepth,
+                  AOM_BORDER_IN_PIXELS, cm->byte_alignment,
                   &pool->frame_bufs[buf_idx].raw_frame_buffer, pool->get_fb_cb,
                   pool->cb_priv)) {
             unlock_buffer_pool(pool);
@@ -4664,7 +4689,8 @@
                                "Failed to allocate frame buffer");
           }
           unlock_buffer_pool(pool);
-          set_planes_to_neutral_grey(cm, &frame_bufs[buf_idx].buf, 0);
+          set_planes_to_neutral_grey(&cm->seq_params, &frame_bufs[buf_idx].buf,
+                                     0);
 
           cm->ref_frame_map[ref_idx] = buf_idx;
           frame_bufs[buf_idx].cur_frame_offset = frame_offset;
@@ -4692,7 +4718,7 @@
     } else if (pbi->need_resync != 1) { /* Skip if need resync */
 
       // Frame refs short signaling is off when error resilient mode is on.
-      if (cm->seq_params.enable_order_hint)
+      if (seq_params->enable_order_hint)
         cm->frame_refs_short_signaling = aom_rb_read_bit(rb);
 
       if (cm->frame_refs_short_signaling) {
@@ -4746,9 +4772,9 @@
 
         cm->ref_frame_sign_bias[LAST_FRAME + i] = 0;
 
-        if (cm->seq_params.frame_id_numbers_present_flag) {
-          int frame_id_length = cm->seq_params.frame_id_length;
-          int diff_len = cm->seq_params.delta_frame_id_length;
+        if (seq_params->frame_id_numbers_present_flag) {
+          int frame_id_length = seq_params->frame_id_length;
+          int diff_len = seq_params->delta_frame_id_length;
           int delta_frame_id_minus_1 = aom_rb_read_literal(rb, diff_len);
           int ref_frame_id =
               ((cm->current_frame_id - (delta_frame_id_minus_1 + 1) +
@@ -4811,7 +4837,7 @@
   cm->cur_frame->intra_only = cm->frame_type == KEY_FRAME || cm->intra_only;
   cm->cur_frame->frame_type = cm->frame_type;
 
-  if (cm->seq_params.frame_id_numbers_present_flag) {
+  if (seq_params->frame_id_numbers_present_flag) {
     /* If bitmask is set, update reference frame id values and
        mark frames as valid for reference */
     int refresh_frame_flags = pbi->refresh_frame_flags;
@@ -4824,7 +4850,7 @@
   }
 
   const int might_bwd_adapt =
-      !(cm->seq_params.reduced_still_picture_hdr) && !(cm->disable_cdf_update);
+      !(seq_params->reduced_still_picture_hdr) && !(cm->disable_cdf_update);
   if (might_bwd_adapt) {
     cm->refresh_frame_context = aom_rb_read_bit(rb)
                                     ? REFRESH_FRAME_CONTEXT_DISABLED
@@ -4833,14 +4859,16 @@
     cm->refresh_frame_context = REFRESH_FRAME_CONTEXT_DISABLED;
   }
 
-  get_frame_new_buffer(cm)->bit_depth = cm->bit_depth;
-  get_frame_new_buffer(cm)->color_primaries = cm->color_primaries;
+  get_frame_new_buffer(cm)->bit_depth = seq_params->bit_depth;
+  get_frame_new_buffer(cm)->color_primaries = seq_params->color_primaries;
   get_frame_new_buffer(cm)->transfer_characteristics =
-      cm->transfer_characteristics;
-  get_frame_new_buffer(cm)->matrix_coefficients = cm->matrix_coefficients;
-  get_frame_new_buffer(cm)->monochrome = cm->seq_params.monochrome;
-  get_frame_new_buffer(cm)->chroma_sample_position = cm->chroma_sample_position;
-  get_frame_new_buffer(cm)->color_range = cm->color_range;
+      seq_params->transfer_characteristics;
+  get_frame_new_buffer(cm)->matrix_coefficients =
+      seq_params->matrix_coefficients;
+  get_frame_new_buffer(cm)->monochrome = seq_params->monochrome;
+  get_frame_new_buffer(cm)->chroma_sample_position =
+      seq_params->chroma_sample_position;
+  get_frame_new_buffer(cm)->color_range = seq_params->color_range;
   get_frame_new_buffer(cm)->render_width = cm->render_width;
   get_frame_new_buffer(cm)->render_height = cm->render_height;
 
@@ -4892,7 +4920,7 @@
 
   read_tile_info(pbi, rb);
   setup_quantization(cm, rb);
-  xd->bd = (int)cm->bit_depth;
+  xd->bd = (int)seq_params->bit_depth;
 
   if (cm->num_allocated_above_context_planes < av1_num_planes(cm) ||
       cm->num_allocated_above_context_mi_col < cm->mi_cols ||
@@ -4943,22 +4971,22 @@
     cm->lf.filter_level[0] = 0;
     cm->lf.filter_level[1] = 0;
   }
-  if (cm->coded_lossless || !cm->seq_params.enable_cdef) {
+  if (cm->coded_lossless || !seq_params->enable_cdef) {
     cm->cdef_bits = 0;
     cm->cdef_strengths[0] = 0;
     cm->cdef_uv_strengths[0] = 0;
   }
-  if (cm->all_lossless || !cm->seq_params.enable_restoration) {
+  if (cm->all_lossless || !seq_params->enable_restoration) {
     cm->rst_info[0].frame_restoration_type = RESTORE_NONE;
     cm->rst_info[1].frame_restoration_type = RESTORE_NONE;
     cm->rst_info[2].frame_restoration_type = RESTORE_NONE;
   }
   setup_loopfilter(cm, rb);
 
-  if (!cm->coded_lossless && cm->seq_params.enable_cdef) {
+  if (!cm->coded_lossless && seq_params->enable_cdef) {
     setup_cdef(cm, rb);
   }
-  if (!cm->all_lossless && cm->seq_params.enable_restoration) {
+  if (!cm->all_lossless && seq_params->enable_restoration) {
     decode_restoration_mode(cm, rb);
   }
 
@@ -5092,7 +5120,8 @@
 
   av1_setup_motion_field(cm);
 
-  av1_setup_block_planes(xd, cm->subsampling_x, cm->subsampling_y, num_planes);
+  av1_setup_block_planes(xd, cm->seq_params.subsampling_x,
+                         cm->seq_params.subsampling_y, num_planes);
   if (cm->primary_ref_frame == PRIMARY_REF_NONE) {
     // use the default frame context values
     *cm->fc = cm->frame_contexts[FRAME_CONTEXT_DEFAULTS];
@@ -5116,7 +5145,7 @@
       cm->rst_info[2].frame_restoration_type != RESTORE_NONE) {
     av1_alloc_restoration_buffers(cm);
   }
-  const int use_highbd = cm->use_highbitdepth ? 1 : 0;
+  const int use_highbd = cm->seq_params.use_highbitdepth ? 1 : 0;
   const int buf_size = MC_TEMP_BUF_PELS << use_highbd;
   if (pbi->td.mc_buf_size != buf_size) {
     av1_free_mc_tmp_buf(&pbi->td, use_highbd);
@@ -5146,7 +5175,9 @@
 
   const int num_planes = av1_num_planes(cm);
   // If the bit stream is monochrome, set the U and V buffers to a constant.
-  if (num_planes < 3) set_planes_to_neutral_grey(cm, xd->cur_buf, 1);
+  if (num_planes < 3) {
+    set_planes_to_neutral_grey(&cm->seq_params, xd->cur_buf, 1);
+  }
 
   if (end_tile != cm->tile_rows * cm->tile_cols - 1) {
     return;
diff --git a/av1/decoder/decodeframe.h b/av1/decoder/decodeframe.h
index 1aaf5fa..d289b31 100644
--- a/av1/decoder/decodeframe.h
+++ b/av1/decoder/decodeframe.h
@@ -51,8 +51,9 @@
 
 // Implements the color_config() function in the spec. Reports errors by
 // calling rb->error_handler() or aom_internal_error().
-void av1_read_color_config(AV1_COMMON *cm, struct aom_read_bit_buffer *rb,
-                           int allow_lowbitdepth, SequenceHeader *seq_params);
+void av1_read_color_config(struct aom_read_bit_buffer *rb,
+                           int allow_lowbitdepth, SequenceHeader *seq_params,
+                           struct aom_internal_error_info *error_info);
 
 // Implements the timing_info() function in the spec. Reports errors by calling
 // rb->error_handler().
diff --git a/av1/decoder/decodemv.c b/av1/decoder/decodemv.c
index b771ff9..5e920b1 100644
--- a/av1/decoder/decodemv.c
+++ b/av1/decoder/decodemv.c
@@ -573,7 +573,7 @@
           aom_read_symbol(r, xd->tile_ctx->palette_y_size_cdf[bsize_ctx],
                           PALETTE_SIZES, ACCT_STR) +
           2;
-      read_palette_colors_y(xd, cm->bit_depth, pmi, r);
+      read_palette_colors_y(xd, cm->seq_params.bit_depth, pmi, r);
     }
   }
   if (num_planes > 1 && mbmi->uv_mode == UV_DC_PRED &&
@@ -587,7 +587,7 @@
           aom_read_symbol(r, xd->tile_ctx->palette_uv_size_cdf[bsize_ctx],
                           PALETTE_SIZES, ACCT_STR) +
           2;
-      read_palette_colors_uv(xd, cm->bit_depth, pmi, r);
+      read_palette_colors_uv(xd, cm->seq_params.bit_depth, pmi, r);
     }
   }
 }
@@ -1480,8 +1480,9 @@
     }
   }
 
-  xd->cfl.is_chroma_reference = is_chroma_reference(
-      mi_row, mi_col, bsize, cm->subsampling_x, cm->subsampling_y);
+  xd->cfl.is_chroma_reference =
+      is_chroma_reference(mi_row, mi_col, bsize, cm->seq_params.subsampling_x,
+                          cm->seq_params.subsampling_y);
   xd->cfl.store_y = store_cfl_required(cm, xd);
 
 #if DEC_MISMATCH_DEBUG
diff --git a/av1/decoder/decoder.c b/av1/decoder/decoder.c
index d65e88c..d48114f 100644
--- a/av1/decoder/decoder.c
+++ b/av1/decoder/decoder.c
@@ -109,7 +109,7 @@
   pbi->decoding_first_frame = 1;
   pbi->common.buffer_pool = pool;
 
-  cm->bit_depth = AOM_BITS_8;
+  cm->seq_params.bit_depth = AOM_BITS_8;
   cm->dequant_bit_depth = AOM_BITS_8;
 
   cm->alloc_mi = av1_dec_alloc_mi;
@@ -168,7 +168,7 @@
   if (pbi->thread_data) {
     for (int worker_idx = 0; worker_idx < pbi->max_threads - 1; worker_idx++) {
       DecWorkerData *const thread_data = pbi->thread_data + worker_idx;
-      const int use_highbd = pbi->common.use_highbitdepth ? 1 : 0;
+      const int use_highbd = pbi->common.seq_params.use_highbitdepth ? 1 : 0;
       av1_free_mc_tmp_buf(thread_data->td, use_highbd);
       aom_free(thread_data->td);
     }
@@ -206,7 +206,7 @@
 #if CONFIG_ACCOUNTING
   aom_accounting_clear(&pbi->accounting);
 #endif
-  const int use_highbd = pbi->common.use_highbitdepth ? 1 : 0;
+  const int use_highbd = pbi->common.seq_params.use_highbitdepth ? 1 : 0;
   av1_free_mc_tmp_buf(&pbi->td, use_highbd);
 
   aom_free(pbi);
diff --git a/av1/decoder/dthread.c b/av1/decoder/dthread.c
index ff03502..3946c78 100644
--- a/av1/decoder/dthread.c
+++ b/av1/decoder/dthread.c
@@ -157,8 +157,8 @@
   dst_worker_data->pbi->need_resync = src_worker_data->pbi->need_resync;
   av1_frameworker_unlock_stats(src_worker);
 
-  dst_cm->bit_depth = src_cm->bit_depth;
-  dst_cm->use_highbitdepth = src_cm->use_highbitdepth;
+  dst_cm->seq_params.bit_depth = src_cm->seq_params.bit_depth;
+  dst_cm->seq_params.use_highbitdepth = src_cm->seq_params.use_highbitdepth;
   // TODO(zoeliu): To handle parallel decoding
   dst_cm->prev_frame =
       src_cm->show_existing_frame ? src_cm->prev_frame : src_cm->cur_frame;
@@ -166,8 +166,8 @@
       !src_cm->show_existing_frame ? src_cm->width : src_cm->last_width;
   dst_cm->last_height =
       !src_cm->show_existing_frame ? src_cm->height : src_cm->last_height;
-  dst_cm->subsampling_x = src_cm->subsampling_x;
-  dst_cm->subsampling_y = src_cm->subsampling_y;
+  dst_cm->seq_params.subsampling_x = src_cm->seq_params.subsampling_x;
+  dst_cm->seq_params.subsampling_y = src_cm->seq_params.subsampling_y;
   dst_cm->frame_type = src_cm->frame_type;
   dst_cm->last_show_frame = !src_cm->show_existing_frame
                                 ? src_cm->show_frame
diff --git a/av1/decoder/obu.c b/av1/decoder/obu.c
index 025e643..2c5ec85 100644
--- a/av1/decoder/obu.c
+++ b/av1/decoder/obu.c
@@ -202,17 +202,17 @@
   // Verify rb has been configured to report errors.
   assert(rb->error_handler);
 
-  cm->profile = av1_read_profile(rb);
-  if (cm->profile > PROFILE_2) {
-    cm->error.error_code = AOM_CODEC_UNSUP_BITSTREAM;
-    return 0;
-  }
-
   // Use a local variable to store the information as we decode. At the end,
   // if no errors have occurred, cm->seq_params is updated.
   SequenceHeader sh = cm->seq_params;
   SequenceHeader *const seq_params = &sh;
 
+  seq_params->profile = av1_read_profile(rb);
+  if (seq_params->profile > PROFILE_2) {
+    cm->error.error_code = AOM_CODEC_UNSUP_BITSTREAM;
+    return 0;
+  }
+
   // Still picture or not
   seq_params->still_picture = aom_rb_read_bit(rb);
   seq_params->reduced_still_picture_hdr = aom_rb_read_bit(rb);
@@ -273,7 +273,8 @@
           (cm->timing_info.equal_picture_interval ||
            cm->op_params[i].decoder_model_param_present_flag)) {
         cm->op_params[i].bitrate = max_level_bitrate(
-            cm->profile, major_minor_to_seq_level_idx(seq_params->level[i]),
+            seq_params->profile,
+            major_minor_to_seq_level_idx(seq_params->level[i]),
             seq_params->tier[i]);
         // Level with seq_level_idx = 31 returns a high "dummy" bitrate to pass
         // the check
@@ -328,14 +329,14 @@
 
   av1_read_sequence_header(cm, rb, seq_params);
 
-  av1_read_color_config(cm, rb, pbi->allow_lowbitdepth, seq_params);
-  if (!(cm->subsampling_x == 0 && cm->subsampling_y == 0) &&
-      !(cm->subsampling_x == 1 && cm->subsampling_y == 1) &&
-      !(cm->subsampling_x == 1 && cm->subsampling_y == 0)) {
+  av1_read_color_config(rb, pbi->allow_lowbitdepth, seq_params, &cm->error);
+  if (!(seq_params->subsampling_x == 0 && seq_params->subsampling_y == 0) &&
+      !(seq_params->subsampling_x == 1 && seq_params->subsampling_y == 1) &&
+      !(seq_params->subsampling_x == 1 && seq_params->subsampling_y == 0)) {
     aom_internal_error(&cm->error, AOM_CODEC_UNSUP_BITSTREAM,
                        "Only 4:4:4, 4:2:2 and 4:2:0 are currently supported, "
                        "%d %d subsampling is not supported.\n",
-                       cm->subsampling_x, cm->subsampling_y);
+                       seq_params->subsampling_x, seq_params->subsampling_y);
   }
 
   cm->film_grain_params_present = aom_rb_read_bit(rb);
@@ -435,15 +436,15 @@
   AV1_COMMON *const cm = &pbi->common;
   const int tile_width_in_pixels = cm->tile_width * MI_SIZE;
   const int tile_height_in_pixels = cm->tile_height * MI_SIZE;
-  const int ssy = cm->subsampling_y;
-  const int ssx = cm->subsampling_x;
+  const int ssy = cm->seq_params.subsampling_y;
+  const int ssx = cm->seq_params.subsampling_x;
   const int num_planes = av1_num_planes(cm);
   const size_t yplane_tile_size = tile_height_in_pixels * tile_width_in_pixels;
   const size_t uvplane_tile_size =
       (num_planes > 1)
           ? (tile_height_in_pixels >> ssy) * (tile_width_in_pixels >> ssx)
           : 0;
-  const size_t tile_size = (cm->use_highbitdepth ? 2 : 1) *
+  const size_t tile_size = (cm->seq_params.use_highbitdepth ? 2 : 1) *
                            (yplane_tile_size + 2 * uvplane_tile_size);
   pbi->tile_list_size = tile_size * (pbi->tile_count_minus_1 + 1);
 
@@ -464,8 +465,8 @@
   AV1_COMMON *const cm = &pbi->common;
   const int tile_width_in_pixels = cm->tile_width * MI_SIZE;
   const int tile_height_in_pixels = cm->tile_height * MI_SIZE;
-  const int ssy = cm->subsampling_y;
-  const int ssx = cm->subsampling_x;
+  const int ssy = cm->seq_params.subsampling_y;
+  const int ssx = cm->seq_params.subsampling_x;
   const int num_planes = av1_num_planes(cm);
 
   // Copy decoded tile to the tile list output buffer.
diff --git a/av1/encoder/aq_complexity.c b/av1/encoder/aq_complexity.c
index c5a6bc8..b721b6d 100644
--- a/av1/encoder/aq_complexity.c
+++ b/av1/encoder/aq_complexity.c
@@ -66,7 +66,8 @@
       cpi->refresh_alt_ref_frame ||
       (cpi->refresh_golden_frame && !cpi->rc.is_src_frame_alt_ref)) {
     int segment;
-    const int aq_strength = get_aq_c_strength(cm->base_qindex, cm->bit_depth);
+    const int aq_strength =
+        get_aq_c_strength(cm->base_qindex, cm->seq_params.bit_depth);
 
     // Clear down the segment map.
     memset(cpi->segmentation_map, DEFAULT_AQ2_SEG, cm->mi_rows * cm->mi_cols);
@@ -93,7 +94,7 @@
 
       qindex_delta = av1_compute_qdelta_by_rate(
           &cpi->rc, cm->frame_type, cm->base_qindex,
-          aq_c_q_adj_factor[aq_strength][segment], cm->bit_depth);
+          aq_c_q_adj_factor[aq_strength][segment], cm->seq_params.bit_depth);
 
       // For AQ complexity mode, we dont allow Q0 in a segment if the base
       // Q is not 0. Q0 (lossless) implies 4x4 only and in AQ mode 2 a segment
@@ -138,7 +139,8 @@
     const int target_rate = (int)(num / denom);
     double logvar;
     double low_var_thresh;
-    const int aq_strength = get_aq_c_strength(cm->base_qindex, cm->bit_depth);
+    const int aq_strength =
+        get_aq_c_strength(cm->base_qindex, cm->seq_params.bit_depth);
 
     aom_clear_system_state();
     low_var_thresh = (cpi->oxcf.pass == 2) ? AOMMAX(cpi->twopass.mb_av_energy,
diff --git a/av1/encoder/aq_cyclicrefresh.c b/av1/encoder/aq_cyclicrefresh.c
index a1fe37d..dec2c73 100644
--- a/av1/encoder/aq_cyclicrefresh.c
+++ b/av1/encoder/aq_cyclicrefresh.c
@@ -137,8 +137,9 @@
 static int compute_deltaq(const AV1_COMP *cpi, int q, double rate_factor) {
   const CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
   const RATE_CONTROL *const rc = &cpi->rc;
-  int deltaq = av1_compute_qdelta_by_rate(rc, cpi->common.frame_type, q,
-                                          rate_factor, cpi->common.bit_depth);
+  int deltaq =
+      av1_compute_qdelta_by_rate(rc, cpi->common.frame_type, q, rate_factor,
+                                 cpi->common.seq_params.bit_depth);
   if ((-deltaq) > cr->max_qdelta_perc * q / 100) {
     deltaq = -cr->max_qdelta_perc * q / 100;
   }
@@ -164,15 +165,16 @@
   estimated_bits =
       (int)((1.0 - weight_segment1 - weight_segment2) *
                 av1_estimate_bits_at_q(cm->frame_type, cm->base_qindex, mbs,
-                                       correction_factor, cm->bit_depth) +
-            weight_segment1 *
-                av1_estimate_bits_at_q(cm->frame_type,
-                                       cm->base_qindex + cr->qindex_delta[1],
-                                       mbs, correction_factor, cm->bit_depth) +
-            weight_segment2 *
-                av1_estimate_bits_at_q(cm->frame_type,
-                                       cm->base_qindex + cr->qindex_delta[2],
-                                       mbs, correction_factor, cm->bit_depth));
+                                       correction_factor,
+                                       cm->seq_params.bit_depth) +
+            weight_segment1 * av1_estimate_bits_at_q(
+                                  cm->frame_type,
+                                  cm->base_qindex + cr->qindex_delta[1], mbs,
+                                  correction_factor, cm->seq_params.bit_depth) +
+            weight_segment2 * av1_estimate_bits_at_q(
+                                  cm->frame_type,
+                                  cm->base_qindex + cr->qindex_delta[2], mbs,
+                                  correction_factor, cm->seq_params.bit_depth));
   return estimated_bits;
 }
 
@@ -197,12 +199,13 @@
   // Compute delta-q corresponding to qindex i.
   int deltaq = compute_deltaq(cpi, i, cr->rate_ratio_qdelta);
   // Take segment weighted average for bits per mb.
-  bits_per_mb = (int)((1.0 - weight_segment) *
-                          av1_rc_bits_per_mb(cm->frame_type, i,
-                                             correction_factor, cm->bit_depth) +
-                      weight_segment *
-                          av1_rc_bits_per_mb(cm->frame_type, i + deltaq,
-                                             correction_factor, cm->bit_depth));
+  bits_per_mb =
+      (int)((1.0 - weight_segment) *
+                av1_rc_bits_per_mb(cm->frame_type, i, correction_factor,
+                                   cm->seq_params.bit_depth) +
+            weight_segment * av1_rc_bits_per_mb(cm->frame_type, i + deltaq,
+                                                correction_factor,
+                                                cm->seq_params.bit_depth));
   return bits_per_mb;
 }
 
@@ -507,7 +510,8 @@
   } else {
     int qindex_delta = 0;
     int qindex2;
-    const double q = av1_convert_qindex_to_q(cm->base_qindex, cm->bit_depth);
+    const double q =
+        av1_convert_qindex_to_q(cm->base_qindex, cm->seq_params.bit_depth);
     aom_clear_system_state();
     // Set rate threshold to some multiple (set to 2 for now) of the target
     // rate (target is given by sb64_target_rate and scaled by 256).
diff --git a/av1/encoder/aq_variance.c b/av1/encoder/aq_variance.c
index 29a3114..6cb6adc 100644
--- a/av1/encoder/aq_variance.c
+++ b/av1/encoder/aq_variance.c
@@ -71,7 +71,7 @@
     for (i = 0; i < MAX_SEGMENTS; ++i) {
       int qindex_delta =
           av1_compute_qdelta_by_rate(&cpi->rc, cm->frame_type, cm->base_qindex,
-                                     rate_ratio[i], cm->bit_depth);
+                                     rate_ratio[i], cm->seq_params.bit_depth);
 
       // We don't allow qindex 0 in a segment if the base value is not 0.
       // Q index 0 (lossless) implies 4x4 encoding only and in AQ mode a segment
@@ -235,9 +235,9 @@
 
   const int rate_level = SEGMENT_ID(block_var_level);
   const AV1_COMMON *const cm = &cpi->common;
-  int qindex_delta =
-      av1_compute_qdelta_by_rate(&cpi->rc, cm->frame_type, cm->base_qindex,
-                                 rate_ratio[rate_level], cm->bit_depth);
+  int qindex_delta = av1_compute_qdelta_by_rate(
+      &cpi->rc, cm->frame_type, cm->base_qindex, rate_ratio[rate_level],
+      cm->seq_params.bit_depth);
 
   if ((cm->base_qindex != 0) && ((cm->base_qindex + qindex_delta) == 0)) {
     qindex_delta = -cm->base_qindex + 1;
diff --git a/av1/encoder/av1_quantize.c b/av1/encoder/av1_quantize.c
index 1c5bdeb..d0477b3 100644
--- a/av1/encoder/av1_quantize.c
+++ b/av1/encoder/av1_quantize.c
@@ -613,9 +613,9 @@
   AV1_COMMON *const cm = &cpi->common;
   QUANTS *const quants = &cpi->quants;
   Dequants *const dequants = &cpi->dequants;
-  av1_build_quantizer(cm->bit_depth, cm->y_dc_delta_q, cm->u_dc_delta_q,
-                      cm->u_ac_delta_q, cm->v_dc_delta_q, cm->v_ac_delta_q,
-                      quants, dequants);
+  av1_build_quantizer(cm->seq_params.bit_depth, cm->y_dc_delta_q,
+                      cm->u_dc_delta_q, cm->u_ac_delta_q, cm->v_dc_delta_q,
+                      cm->v_ac_delta_q, quants, dequants);
 }
 
 void av1_init_plane_quantizers(const AV1_COMP *cpi, MACROBLOCK *x,
@@ -713,7 +713,7 @@
   cm->qm_u = aom_get_qmlevel(cm->base_qindex + cm->u_ac_delta_q,
                              cm->min_qmlevel, cm->max_qmlevel);
 
-  if (!cm->separate_uv_delta_q)
+  if (!cm->seq_params.separate_uv_delta_q)
     cm->qm_v = cm->qm_u;
   else
     cm->qm_v = aom_get_qmlevel(cm->base_qindex + cm->v_ac_delta_q,
diff --git a/av1/encoder/bitstream.c b/av1/encoder/bitstream.c
index 163b759..c246c1a 100644
--- a/av1/encoder/bitstream.c
+++ b/av1/encoder/bitstream.c
@@ -769,7 +769,7 @@
       aom_write_symbol(w, n - PALETTE_MIN_SIZE,
                        xd->tile_ctx->palette_y_size_cdf[bsize_ctx],
                        PALETTE_SIZES);
-      write_palette_colors_y(xd, pmi, cm->bit_depth, w);
+      write_palette_colors_y(xd, pmi, cm->seq_params.bit_depth, w);
     }
   }
 
@@ -786,7 +786,7 @@
       aom_write_symbol(w, n - PALETTE_MIN_SIZE,
                        xd->tile_ctx->palette_uv_size_cdf[bsize_ctx],
                        PALETTE_SIZES);
-      write_palette_colors_uv(xd, pmi, cm->bit_depth, w);
+      write_palette_colors_uv(xd, pmi, cm->seq_params.bit_depth, w);
     }
   }
 }
@@ -1421,8 +1421,8 @@
     for (blk_col = col >> pd->subsampling_x; blk_col < unit_width;
          blk_col += bkw) {
       pack_txb_tokens(w, cm, x, tok, tok_end, xd, mbmi, plane, plane_bsize,
-                      cm->bit_depth, *block, blk_row, blk_col, max_tx_size,
-                      token_stats);
+                      cm->seq_params.bit_depth, *block, blk_row, blk_col,
+                      max_tx_size, token_stats);
       *block += step;
     }
   }
@@ -1778,7 +1778,7 @@
   }
 
   if (num_planes > 1) {
-    int s = AOMMIN(cm->subsampling_x, cm->subsampling_y);
+    int s = AOMMIN(cm->seq_params.subsampling_x, cm->seq_params.subsampling_y);
     if (s && !chroma_none) {
       aom_wb_write_bit(wb, cm->rst_info[1].restoration_unit_size !=
                                cm->rst_info[0].restoration_unit_size);
@@ -2019,7 +2019,7 @@
   if (num_planes > 1) {
     int diff_uv_delta = (cm->u_dc_delta_q != cm->v_dc_delta_q) ||
                         (cm->u_ac_delta_q != cm->v_ac_delta_q);
-    if (cm->separate_uv_delta_q) aom_wb_write_bit(wb, diff_uv_delta);
+    if (cm->seq_params.separate_uv_delta_q) aom_wb_write_bit(wb, diff_uv_delta);
     write_delta_q(wb, cm->u_dc_delta_q);
     write_delta_q(wb, cm->u_ac_delta_q);
     if (diff_uv_delta) {
@@ -2031,7 +2031,7 @@
   if (cm->using_qmatrix) {
     aom_wb_write_literal(wb, cm->qm_y, QM_LEVEL_BITS);
     aom_wb_write_literal(wb, cm->qm_u, QM_LEVEL_BITS);
-    if (!cm->separate_uv_delta_q)
+    if (!cm->seq_params.separate_uv_delta_q)
       assert(cm->qm_u == cm->qm_v);
     else
       aom_wb_write_literal(wb, cm->qm_v, QM_LEVEL_BITS);
@@ -2425,80 +2425,82 @@
   aom_wb_write_literal(wb, profile, PROFILE_BITS);
 }
 
-static void write_bitdepth(AV1_COMMON *const cm,
+static void write_bitdepth(const SequenceHeader *const seq_params,
                            struct aom_write_bit_buffer *wb) {
   // Profile 0/1: [0] for 8 bit, [1]  10-bit
   // Profile   2: [0] for 8 bit, [10] 10-bit, [11] - 12-bit
-  aom_wb_write_bit(wb, cm->bit_depth == AOM_BITS_8 ? 0 : 1);
-  if (cm->profile == PROFILE_2 && cm->bit_depth != AOM_BITS_8) {
-    aom_wb_write_bit(wb, cm->bit_depth == AOM_BITS_10 ? 0 : 1);
+  aom_wb_write_bit(wb, seq_params->bit_depth == AOM_BITS_8 ? 0 : 1);
+  if (seq_params->profile == PROFILE_2 && seq_params->bit_depth != AOM_BITS_8) {
+    aom_wb_write_bit(wb, seq_params->bit_depth == AOM_BITS_10 ? 0 : 1);
   }
 }
 
-static void write_color_config(AV1_COMMON *const cm,
+static void write_color_config(const SequenceHeader *const seq_params,
                                struct aom_write_bit_buffer *wb) {
-  write_bitdepth(cm, wb);
-  const int is_monochrome = cm->seq_params.monochrome;
+  write_bitdepth(seq_params, wb);
+  const int is_monochrome = seq_params->monochrome;
   // monochrome bit
-  if (cm->profile != PROFILE_1)
+  if (seq_params->profile != PROFILE_1)
     aom_wb_write_bit(wb, is_monochrome);
   else
     assert(!is_monochrome);
-  if (cm->color_primaries == AOM_CICP_CP_UNSPECIFIED &&
-      cm->transfer_characteristics == AOM_CICP_TC_UNSPECIFIED &&
-      cm->matrix_coefficients == AOM_CICP_MC_UNSPECIFIED) {
+  if (seq_params->color_primaries == AOM_CICP_CP_UNSPECIFIED &&
+      seq_params->transfer_characteristics == AOM_CICP_TC_UNSPECIFIED &&
+      seq_params->matrix_coefficients == AOM_CICP_MC_UNSPECIFIED) {
     aom_wb_write_bit(wb, 0);  // No color description present
   } else {
     aom_wb_write_bit(wb, 1);  // Color description present
-    aom_wb_write_literal(wb, cm->color_primaries, 8);
-    aom_wb_write_literal(wb, cm->transfer_characteristics, 8);
-    aom_wb_write_literal(wb, cm->matrix_coefficients, 8);
+    aom_wb_write_literal(wb, seq_params->color_primaries, 8);
+    aom_wb_write_literal(wb, seq_params->transfer_characteristics, 8);
+    aom_wb_write_literal(wb, seq_params->matrix_coefficients, 8);
   }
   if (is_monochrome) {
     // 0: [16, 235] (i.e. xvYCC), 1: [0, 255]
-    aom_wb_write_bit(wb, cm->color_range);
+    aom_wb_write_bit(wb, seq_params->color_range);
     return;
   }
-  if (cm->color_primaries == AOM_CICP_CP_BT_709 &&
-      cm->transfer_characteristics == AOM_CICP_TC_SRGB &&
-      cm->matrix_coefficients ==
+  if (seq_params->color_primaries == AOM_CICP_CP_BT_709 &&
+      seq_params->transfer_characteristics == AOM_CICP_TC_SRGB &&
+      seq_params->matrix_coefficients ==
           AOM_CICP_MC_IDENTITY) {  // it would be better to remove this
                                    // dependency too
-    assert(cm->subsampling_x == 0 && cm->subsampling_y == 0);
-    assert(cm->profile == PROFILE_1 ||
-           (cm->profile == PROFILE_2 && cm->bit_depth == AOM_BITS_12));
+    assert(seq_params->subsampling_x == 0 && seq_params->subsampling_y == 0);
+    assert(seq_params->profile == PROFILE_1 ||
+           (seq_params->profile == PROFILE_2 &&
+            seq_params->bit_depth == AOM_BITS_12));
   } else {
     // 0: [16, 235] (i.e. xvYCC), 1: [0, 255]
-    aom_wb_write_bit(wb, cm->color_range);
-    if (cm->profile == PROFILE_0) {
+    aom_wb_write_bit(wb, seq_params->color_range);
+    if (seq_params->profile == PROFILE_0) {
       // 420 only
-      assert(cm->subsampling_x == 1 && cm->subsampling_y == 1);
-    } else if (cm->profile == PROFILE_1) {
+      assert(seq_params->subsampling_x == 1 && seq_params->subsampling_y == 1);
+    } else if (seq_params->profile == PROFILE_1) {
       // 444 only
-      assert(cm->subsampling_x == 0 && cm->subsampling_y == 0);
-    } else if (cm->profile == PROFILE_2) {
-      if (cm->bit_depth == AOM_BITS_12) {
+      assert(seq_params->subsampling_x == 0 && seq_params->subsampling_y == 0);
+    } else if (seq_params->profile == PROFILE_2) {
+      if (seq_params->bit_depth == AOM_BITS_12) {
         // 420, 444 or 422
-        aom_wb_write_bit(wb, cm->subsampling_x);
-        if (cm->subsampling_x == 0) {
-          assert(cm->subsampling_y == 0 &&
+        aom_wb_write_bit(wb, seq_params->subsampling_x);
+        if (seq_params->subsampling_x == 0) {
+          assert(seq_params->subsampling_y == 0 &&
                  "4:4:0 subsampling not allowed in AV1");
         } else {
-          aom_wb_write_bit(wb, cm->subsampling_y);
+          aom_wb_write_bit(wb, seq_params->subsampling_y);
         }
       } else {
         // 422 only
-        assert(cm->subsampling_x == 1 && cm->subsampling_y == 0);
+        assert(seq_params->subsampling_x == 1 &&
+               seq_params->subsampling_y == 0);
       }
     }
-    if (cm->matrix_coefficients == AOM_CICP_MC_IDENTITY) {
-      assert(cm->subsampling_x == 0 && cm->subsampling_y == 0);
+    if (seq_params->matrix_coefficients == AOM_CICP_MC_IDENTITY) {
+      assert(seq_params->subsampling_x == 0 && seq_params->subsampling_y == 0);
     }
-    if (cm->subsampling_x == 1 && cm->subsampling_y == 1) {
-      aom_wb_write_literal(wb, cm->chroma_sample_position, 2);
+    if (seq_params->subsampling_x == 1 && seq_params->subsampling_y == 1) {
+      aom_wb_write_literal(wb, seq_params->chroma_sample_position, 2);
     }
   }
-  aom_wb_write_bit(wb, cm->separate_uv_delta_q);
+  aom_wb_write_bit(wb, seq_params->separate_uv_delta_q);
 }
 
 static void write_timing_info_header(AV1_COMMON *const cm,
@@ -2609,8 +2611,8 @@
     pars->chroma_scaling_from_luma = 0;  // for monochrome override to 0
 
   if (cm->seq_params.monochrome || pars->chroma_scaling_from_luma ||
-      ((cm->subsampling_x == 1) && (cm->subsampling_y == 1) &&
-       (pars->num_y_points == 0))) {
+      ((cm->seq_params.subsampling_x == 1) &&
+       (cm->seq_params.subsampling_y == 1) && (pars->num_y_points == 0))) {
     pars->num_cb_points = 0;
     pars->num_cr_points = 0;
   } else {
@@ -3509,7 +3511,7 @@
   struct aom_write_bit_buffer wb = { dst, 0 };
   uint32_t size = 0;
 
-  write_profile(cm->profile, &wb);
+  write_profile(cm->seq_params.profile, &wb);
 
   // Still picture or not
   aom_wb_write_bit(&wb, cm->seq_params.still_picture);
@@ -3563,7 +3565,7 @@
   }
   write_sequence_header(cpi, &wb);
 
-  write_color_config(cm, &wb);
+  write_color_config(&cm->seq_params, &wb);
 
   aom_wb_write_bit(&wb, cm->film_grain_params_present);
 
diff --git a/av1/encoder/encodeframe.c b/av1/encoder/encodeframe.c
index 00f008b..02907d1 100644
--- a/av1/encoder/encodeframe.c
+++ b/av1/encoder/encodeframe.c
@@ -4037,7 +4037,8 @@
   // Copy data over into macro block data structures.
   av1_setup_src_planes(x, cpi->source, 0, 0, num_planes);
 
-  av1_setup_block_planes(xd, cm->subsampling_x, cm->subsampling_y, num_planes);
+  av1_setup_block_planes(xd, cm->seq_params.subsampling_x,
+                         cm->seq_params.subsampling_y, num_planes);
 }
 
 static MV_REFERENCE_FRAME get_frame_type(const AV1_COMP *cpi) {
@@ -4135,7 +4136,7 @@
   this_tile->tctx = *cm->fc;
   td->mb.e_mbd.tile_ctx = &this_tile->tctx;
 
-  cfl_init(&td->mb.e_mbd.cfl, cm);
+  cfl_init(&td->mb.e_mbd.cfl, &cm->seq_params);
 
   av1_crc32c_calculator_init(&td->mb.mb_rd_record.crc_calculator);
 
@@ -4678,8 +4679,9 @@
           }
 
           compute_global_motion_feature_based(
-              model, cpi->source, ref_buf[frame], cpi->common.bit_depth,
-              inliers_by_motion, params_by_motion, RANSAC_NUM_MOTIONS);
+              model, cpi->source, ref_buf[frame],
+              cpi->common.seq_params.bit_depth, inliers_by_motion,
+              params_by_motion, RANSAC_NUM_MOTIONS);
 
           for (i = 0; i < RANSAC_NUM_MOTIONS; ++i) {
             if (inliers_by_motion[i] == 0) continue;
@@ -5088,8 +5090,9 @@
   }
 
   if (!is_inter) {
-    xd->cfl.is_chroma_reference = is_chroma_reference(
-        mi_row, mi_col, bsize, cm->subsampling_x, cm->subsampling_y);
+    xd->cfl.is_chroma_reference =
+        is_chroma_reference(mi_row, mi_col, bsize, cm->seq_params.subsampling_x,
+                            cm->seq_params.subsampling_y);
     xd->cfl.store_y = store_cfl_required(cm, xd);
     mbmi->skip = 1;
     for (int plane = 0; plane < num_planes; ++plane) {
diff --git a/av1/encoder/encoder.c b/av1/encoder/encoder.c
index 9296837..14d0412 100644
--- a/av1/encoder/encoder.c
+++ b/av1/encoder/encoder.c
@@ -461,8 +461,8 @@
              film_grain_test_vectors + oxcf->film_grain_test_vector - 1,
              sizeof(cm->film_grain_params));
 
-      cm->film_grain_params.bit_depth = cm->bit_depth;
-      if (cm->color_range == AOM_CR_FULL_RANGE) {
+      cm->film_grain_params.bit_depth = cm->seq_params.bit_depth;
+      if (cm->seq_params.color_range == AOM_CR_FULL_RANGE) {
         cm->film_grain_params.clip_to_restricted_range = 0;
       }
     }
@@ -614,8 +614,8 @@
       seg->update_map = 1;
       seg->update_data = 1;
 
-      qi_delta =
-          av1_compute_qdelta(rc, rc->avg_q, rc->avg_q * 0.875, cm->bit_depth);
+      qi_delta = av1_compute_qdelta(rc, rc->avg_q, rc->avg_q * 0.875,
+                                    cm->seq_params.bit_depth);
       av1_set_segdata(seg, 1, SEG_LVL_ALT_Q, qi_delta - 2);
       av1_set_segdata(seg, 1, SEG_LVL_ALT_LF_Y_H, -2);
       av1_set_segdata(seg, 1, SEG_LVL_ALT_LF_Y_V, -2);
@@ -639,8 +639,8 @@
         seg->update_map = 0;
         seg->update_data = 1;
 
-        qi_delta =
-            av1_compute_qdelta(rc, rc->avg_q, rc->avg_q * 1.125, cm->bit_depth);
+        qi_delta = av1_compute_qdelta(rc, rc->avg_q, rc->avg_q * 1.125,
+                                      cm->seq_params.bit_depth);
         av1_set_segdata(seg, 1, SEG_LVL_ALT_Q, qi_delta + 2);
         av1_enable_segfeature(seg, 1, SEG_LVL_ALT_Q);
 
@@ -723,53 +723,58 @@
 
 static void alloc_raw_frame_buffers(AV1_COMP *cpi) {
   AV1_COMMON *cm = &cpi->common;
+  const SequenceHeader *const seq_params = &cm->seq_params;
   const AV1EncoderConfig *oxcf = &cpi->oxcf;
 
   if (!cpi->lookahead)
-    cpi->lookahead = av1_lookahead_init(
-        oxcf->width, oxcf->height, cm->subsampling_x, cm->subsampling_y,
-        cm->use_highbitdepth, oxcf->lag_in_frames);
+    cpi->lookahead =
+        av1_lookahead_init(oxcf->width, oxcf->height, seq_params->subsampling_x,
+                           seq_params->subsampling_y,
+                           seq_params->use_highbitdepth, oxcf->lag_in_frames);
   if (!cpi->lookahead)
     aom_internal_error(&cm->error, AOM_CODEC_MEM_ERROR,
                        "Failed to allocate lag buffers");
 
   // TODO(agrange) Check if ARF is enabled and skip allocation if not.
-  if (aom_realloc_frame_buffer(&cpi->alt_ref_buffer, oxcf->width, oxcf->height,
-                               cm->subsampling_x, cm->subsampling_y,
-                               cm->use_highbitdepth, AOM_BORDER_IN_PIXELS,
-                               cm->byte_alignment, NULL, NULL, NULL))
+  if (aom_realloc_frame_buffer(
+          &cpi->alt_ref_buffer, oxcf->width, oxcf->height,
+          seq_params->subsampling_x, seq_params->subsampling_y,
+          seq_params->use_highbitdepth, AOM_BORDER_IN_PIXELS,
+          cm->byte_alignment, NULL, NULL, NULL))
     aom_internal_error(&cm->error, AOM_CODEC_MEM_ERROR,
                        "Failed to allocate altref buffer");
 }
 
 static void alloc_util_frame_buffers(AV1_COMP *cpi) {
   AV1_COMMON *const cm = &cpi->common;
-  if (aom_realloc_frame_buffer(&cpi->last_frame_uf, cm->width, cm->height,
-                               cm->subsampling_x, cm->subsampling_y,
-                               cm->use_highbitdepth, AOM_BORDER_IN_PIXELS,
-                               cm->byte_alignment, NULL, NULL, NULL))
+  const SequenceHeader *const seq_params = &cm->seq_params;
+  if (aom_realloc_frame_buffer(
+          &cpi->last_frame_uf, cm->width, cm->height, seq_params->subsampling_x,
+          seq_params->subsampling_y, seq_params->use_highbitdepth,
+          AOM_BORDER_IN_PIXELS, cm->byte_alignment, NULL, NULL, NULL))
     aom_internal_error(&cm->error, AOM_CODEC_MEM_ERROR,
                        "Failed to allocate last frame buffer");
 
   if (aom_realloc_frame_buffer(
           &cpi->trial_frame_rst, cm->superres_upscaled_width,
-          cm->superres_upscaled_height, cm->subsampling_x, cm->subsampling_y,
-          cm->use_highbitdepth, AOM_BORDER_IN_PIXELS, cm->byte_alignment, NULL,
-          NULL, NULL))
+          cm->superres_upscaled_height, seq_params->subsampling_x,
+          seq_params->subsampling_y, seq_params->use_highbitdepth,
+          AOM_BORDER_IN_PIXELS, cm->byte_alignment, NULL, NULL, NULL))
     aom_internal_error(&cm->error, AOM_CODEC_MEM_ERROR,
                        "Failed to allocate trial restored frame buffer");
 
-  if (aom_realloc_frame_buffer(&cpi->scaled_source, cm->width, cm->height,
-                               cm->subsampling_x, cm->subsampling_y,
-                               cm->use_highbitdepth, AOM_BORDER_IN_PIXELS,
-                               cm->byte_alignment, NULL, NULL, NULL))
+  if (aom_realloc_frame_buffer(
+          &cpi->scaled_source, cm->width, cm->height, seq_params->subsampling_x,
+          seq_params->subsampling_y, seq_params->use_highbitdepth,
+          AOM_BORDER_IN_PIXELS, cm->byte_alignment, NULL, NULL, NULL))
     aom_internal_error(&cm->error, AOM_CODEC_MEM_ERROR,
                        "Failed to allocate scaled source buffer");
 
-  if (aom_realloc_frame_buffer(&cpi->scaled_last_source, cm->width, cm->height,
-                               cm->subsampling_x, cm->subsampling_y,
-                               cm->use_highbitdepth, AOM_BORDER_IN_PIXELS,
-                               cm->byte_alignment, NULL, NULL, NULL))
+  if (aom_realloc_frame_buffer(
+          &cpi->scaled_last_source, cm->width, cm->height,
+          seq_params->subsampling_x, seq_params->subsampling_y,
+          seq_params->use_highbitdepth, AOM_BORDER_IN_PIXELS,
+          cm->byte_alignment, NULL, NULL, NULL))
     aom_internal_error(&cm->error, AOM_CODEC_MEM_ERROR,
                        "Failed to allocate scaled last source buffer");
 }
@@ -957,7 +962,8 @@
     // Set the maximum parameters for bitrate and buffer size for this profile,
     // level, and tier
     cm->op_params[i].bitrate = max_level_bitrate(
-        cm->profile, major_minor_to_seq_level_idx(seq->level[i]), seq->tier[i]);
+        cm->seq_params.profile, major_minor_to_seq_level_idx(seq->level[i]),
+        seq->tier[i]);
     // Level with seq_level_idx = 31 returns a high "dummy" bitrate to pass the
     // check
     if (cm->op_params[i].bitrate == 0)
@@ -1022,15 +1028,15 @@
   cpi->oxcf = *oxcf;
   cpi->framerate = oxcf->init_framerate;
 
-  cm->profile = oxcf->profile;
-  cm->bit_depth = oxcf->bit_depth;
-  cm->use_highbitdepth = oxcf->use_highbitdepth;
-  cm->color_primaries = oxcf->color_primaries;
-  cm->transfer_characteristics = oxcf->transfer_characteristics;
-  cm->matrix_coefficients = oxcf->matrix_coefficients;
+  cm->seq_params.profile = oxcf->profile;
+  cm->seq_params.bit_depth = oxcf->bit_depth;
+  cm->seq_params.use_highbitdepth = oxcf->use_highbitdepth;
+  cm->seq_params.color_primaries = oxcf->color_primaries;
+  cm->seq_params.transfer_characteristics = oxcf->transfer_characteristics;
+  cm->seq_params.matrix_coefficients = oxcf->matrix_coefficients;
   cm->seq_params.monochrome = oxcf->monochrome;
-  cm->chroma_sample_position = oxcf->chroma_sample_position;
-  cm->color_range = oxcf->color_range;
+  cm->seq_params.chroma_sample_position = oxcf->chroma_sample_position;
+  cm->seq_params.color_range = oxcf->color_range;
   cm->timing_info_present = oxcf->timing_info_present;
   cm->timing_info.num_units_in_display_tick =
       oxcf->timing_info.num_units_in_display_tick;
@@ -1381,8 +1387,8 @@
 
 static void highbd_set_var_fns(AV1_COMP *const cpi) {
   AV1_COMMON *const cm = &cpi->common;
-  if (cm->use_highbitdepth) {
-    switch (cm->bit_depth) {
+  if (cm->seq_params.use_highbitdepth) {
+    switch (cm->seq_params.bit_depth) {
       case AOM_BITS_8:
         HIGHBD_BFP(BLOCK_64X16, aom_highbd_sad64x16_bits8,
                    aom_highbd_sad64x16_avg_bits8, aom_highbd_8_variance64x16,
@@ -2242,7 +2248,7 @@
 
       default:
         assert(0 &&
-               "cm->bit_depth should be AOM_BITS_8, "
+               "cm->seq_params.bit_depth should be AOM_BITS_8, "
                "AOM_BITS_10 or AOM_BITS_12");
     }
   }
@@ -2269,20 +2275,22 @@
 
 void av1_change_config(struct AV1_COMP *cpi, const AV1EncoderConfig *oxcf) {
   AV1_COMMON *const cm = &cpi->common;
+  SequenceHeader *const seq_params = &cm->seq_params;
   const int num_planes = av1_num_planes(cm);
   RATE_CONTROL *const rc = &cpi->rc;
   MACROBLOCK *const x = &cpi->td.mb;
 
-  if (cm->profile != oxcf->profile) cm->profile = oxcf->profile;
-  cm->bit_depth = oxcf->bit_depth;
-  cm->color_primaries = oxcf->color_primaries;
-  cm->transfer_characteristics = oxcf->transfer_characteristics;
-  cm->matrix_coefficients = oxcf->matrix_coefficients;
-  cm->seq_params.monochrome = oxcf->monochrome;
-  cm->chroma_sample_position = oxcf->chroma_sample_position;
-  cm->color_range = oxcf->color_range;
+  if (seq_params->profile != oxcf->profile) seq_params->profile = oxcf->profile;
+  seq_params->bit_depth = oxcf->bit_depth;
+  seq_params->color_primaries = oxcf->color_primaries;
+  seq_params->transfer_characteristics = oxcf->transfer_characteristics;
+  seq_params->matrix_coefficients = oxcf->matrix_coefficients;
+  seq_params->monochrome = oxcf->monochrome;
+  seq_params->chroma_sample_position = oxcf->chroma_sample_position;
+  seq_params->color_range = oxcf->color_range;
 
-  assert(IMPLIES(cm->profile <= PROFILE_1, cm->bit_depth <= AOM_BITS_10));
+  assert(IMPLIES(seq_params->profile <= PROFILE_1,
+                 seq_params->bit_depth <= AOM_BITS_10));
 
   cm->timing_info_present = oxcf->timing_info_present;
   cm->timing_info.num_units_in_display_tick =
@@ -2293,9 +2301,9 @@
   cm->timing_info.num_ticks_per_picture =
       oxcf->timing_info.num_ticks_per_picture;
 
-  cm->seq_params.display_model_info_present_flag =
+  seq_params->display_model_info_present_flag =
       oxcf->display_model_info_present_flag;
-  cm->seq_params.decoder_model_info_present_flag =
+  seq_params->decoder_model_info_present_flag =
       oxcf->decoder_model_info_present_flag;
   if (oxcf->decoder_model_info_present_flag) {
     // set the decoder model parameters in schedule mode
@@ -2306,7 +2314,7 @@
     set_dec_model_op_parameters(&cm->op_params[0]);
   } else if (cm->timing_info_present &&
              cm->timing_info.equal_picture_interval &&
-             !cm->seq_params.decoder_model_info_present_flag) {
+             !seq_params->decoder_model_info_present_flag) {
     // set the decoder model parameters in resource availability mode
     set_resource_availability_parameters(&cm->op_params[0]);
   } else {
@@ -2318,7 +2326,7 @@
 
   cpi->oxcf = *oxcf;
   cpi->common.options = oxcf->cfg;
-  x->e_mbd.bd = (int)cm->bit_depth;
+  x->e_mbd.bd = (int)seq_params->bit_depth;
   x->e_mbd.global_motion = cm->global_motion;
 
   if ((oxcf->pass == 0) && (oxcf->rc_mode == AOM_Q)) {
@@ -2376,15 +2384,15 @@
   cm->width = cpi->oxcf.width;
   cm->height = cpi->oxcf.height;
 
-  int sb_size = cm->seq_params.sb_size;
+  int sb_size = seq_params->sb_size;
   // Superblock size should not be updated after the first key frame.
   if (!cpi->seq_params_locked) {
     set_sb_size(&cm->seq_params, select_sb_size(cpi));
   }
 
-  if (cpi->initial_width || sb_size != cm->seq_params.sb_size) {
+  if (cpi->initial_width || sb_size != seq_params->sb_size) {
     if (cm->width > cpi->initial_width || cm->height > cpi->initial_height ||
-        cm->seq_params.sb_size != sb_size) {
+        seq_params->sb_size != sb_size) {
       av1_free_context_buffers(cm);
       av1_free_pc_tree(&cpi->td, num_planes);
       alloc_compressor_data(cpi);
@@ -2411,7 +2419,7 @@
   // Init sequence level coding tools
   // This should not be called after the first key frame.
   if (!cpi->seq_params_locked) {
-    cm->seq_params.operating_points_cnt_minus_1 =
+    seq_params->operating_points_cnt_minus_1 =
         cm->number_spatial_layers > 1 ? cm->number_spatial_layers - 1 : 0;
     init_seq_coding_tools(&cm->seq_params, cm, oxcf);
   }
@@ -3673,13 +3681,14 @@
         if (force_scaling || new_fb_ptr->buf.y_crop_width != cm->width ||
             new_fb_ptr->buf.y_crop_height != cm->height) {
           if (aom_realloc_frame_buffer(
-                  &new_fb_ptr->buf, cm->width, cm->height, cm->subsampling_x,
-                  cm->subsampling_y, cm->use_highbitdepth, AOM_BORDER_IN_PIXELS,
+                  &new_fb_ptr->buf, cm->width, cm->height,
+                  cm->seq_params.subsampling_x, cm->seq_params.subsampling_y,
+                  cm->seq_params.use_highbitdepth, AOM_BORDER_IN_PIXELS,
                   cm->byte_alignment, NULL, NULL, NULL))
             aom_internal_error(&cm->error, AOM_CODEC_MEM_ERROR,
                                "Failed to allocate frame buffer");
-          av1_resize_and_extend_frame(ref, &new_fb_ptr->buf, (int)cm->bit_depth,
-                                      num_planes);
+          av1_resize_and_extend_frame(
+              ref, &new_fb_ptr->buf, (int)cm->seq_params.bit_depth, num_planes);
           cpi->scaled_ref_idx[ref_frame - 1] = new_fb;
           alloc_frame_mvs(cm, new_fb);
         }
@@ -3824,13 +3833,14 @@
 static void check_initial_width(AV1_COMP *cpi, int use_highbitdepth,
                                 int subsampling_x, int subsampling_y) {
   AV1_COMMON *const cm = &cpi->common;
+  SequenceHeader *const seq_params = &cm->seq_params;
 
-  if (!cpi->initial_width || cm->use_highbitdepth != use_highbitdepth ||
-      cm->subsampling_x != subsampling_x ||
-      cm->subsampling_y != subsampling_y) {
-    cm->subsampling_x = subsampling_x;
-    cm->subsampling_y = subsampling_y;
-    cm->use_highbitdepth = use_highbitdepth;
+  if (!cpi->initial_width || seq_params->use_highbitdepth != use_highbitdepth ||
+      seq_params->subsampling_x != subsampling_x ||
+      seq_params->subsampling_y != subsampling_y) {
+    seq_params->subsampling_x = subsampling_x;
+    seq_params->subsampling_y = subsampling_y;
+    seq_params->use_highbitdepth = use_highbitdepth;
 
     alloc_raw_frame_buffers(cpi);
     init_ref_frame_bufs(cm);
@@ -3848,8 +3858,9 @@
 static int set_size_literal(AV1_COMP *cpi, int width, int height) {
   AV1_COMMON *cm = &cpi->common;
   const int num_planes = av1_num_planes(cm);
-  check_initial_width(cpi, cm->use_highbitdepth, cm->subsampling_x,
-                      cm->subsampling_y);
+  check_initial_width(cpi, cm->seq_params.use_highbitdepth,
+                      cm->seq_params.subsampling_x,
+                      cm->seq_params.subsampling_y);
 
   if (width <= 0 || height <= 0) return 1;
 
@@ -3871,6 +3882,7 @@
 
 static void set_frame_size(AV1_COMP *cpi, int width, int height) {
   AV1_COMMON *const cm = &cpi->common;
+  const SequenceHeader *const seq_params = &cm->seq_params;
   const int num_planes = av1_num_planes(cm);
   MACROBLOCKD *const xd = &cpi->td.mb.e_mbd;
   int ref_frame;
@@ -3900,17 +3912,19 @@
   }
 
   // Reset the frame pointers to the current frame size.
-  if (aom_realloc_frame_buffer(get_frame_new_buffer(cm), cm->width, cm->height,
-                               cm->subsampling_x, cm->subsampling_y,
-                               cm->use_highbitdepth, AOM_BORDER_IN_PIXELS,
-                               cm->byte_alignment, NULL, NULL, NULL))
+  if (aom_realloc_frame_buffer(
+          get_frame_new_buffer(cm), cm->width, cm->height,
+          seq_params->subsampling_x, seq_params->subsampling_y,
+          seq_params->use_highbitdepth, AOM_BORDER_IN_PIXELS,
+          cm->byte_alignment, NULL, NULL, NULL))
     aom_internal_error(&cm->error, AOM_CODEC_MEM_ERROR,
                        "Failed to allocate frame buffer");
 
   const int frame_width = cm->superres_upscaled_width;
   const int frame_height = cm->superres_upscaled_height;
-  set_restoration_unit_size(frame_width, frame_height, cm->subsampling_x,
-                            cm->subsampling_y, cm->rst_info);
+  set_restoration_unit_size(frame_width, frame_height,
+                            seq_params->subsampling_x,
+                            seq_params->subsampling_y, cm->rst_info);
   for (int i = 0; i < num_planes; ++i)
     cm->rst_info[i].frame_restoration_type = RESTORE_NONE;
 
@@ -4156,16 +4170,16 @@
     // av1_superres_upscale
     if (aom_realloc_frame_buffer(
             &cpi->scaled_source, cm->superres_upscaled_width,
-            cm->superres_upscaled_height, cm->subsampling_x, cm->subsampling_y,
-            cm->use_highbitdepth, AOM_BORDER_IN_PIXELS, cm->byte_alignment,
-            NULL, NULL, NULL))
+            cm->superres_upscaled_height, cm->seq_params.subsampling_x,
+            cm->seq_params.subsampling_y, cm->seq_params.use_highbitdepth,
+            AOM_BORDER_IN_PIXELS, cm->byte_alignment, NULL, NULL, NULL))
       aom_internal_error(
           &cm->error, AOM_CODEC_MEM_ERROR,
           "Failed to reallocate scaled source buffer for superres");
     assert(cpi->scaled_source.y_crop_width == cm->superres_upscaled_width);
     assert(cpi->scaled_source.y_crop_height == cm->superres_upscaled_height);
     av1_resize_and_extend_frame(cpi->unscaled_source, &cpi->scaled_source,
-                                (int)cm->bit_depth, num_planes);
+                                (int)cm->seq_params.bit_depth, num_planes);
     cpi->source = &cpi->scaled_source;
   }
 }
@@ -4449,7 +4463,7 @@
         int64_t high_err_target = cpi->ambient_err;
         int64_t low_err_target = cpi->ambient_err >> 1;
 
-        if (cm->use_highbitdepth) {
+        if (cm->seq_params.use_highbitdepth) {
           kf_err = aom_highbd_get_y_sse(cpi->source, get_frame_new_buffer(cm));
         } else {
           kf_err = aom_get_y_sse(cpi->source, get_frame_new_buffer(cm));
@@ -4857,6 +4871,7 @@
                                      int skip_adapt,
                                      unsigned int *frame_flags) {
   AV1_COMMON *const cm = &cpi->common;
+  SequenceHeader *const seq_params = &cm->seq_params;
   const AV1EncoderConfig *const oxcf = &cpi->oxcf;
   struct segmentation *const seg = &cm->seg;
 
@@ -4872,7 +4887,7 @@
 
   cm->large_scale_tile = cpi->oxcf.large_scale_tile;
   cm->single_tile_decoding = cpi->oxcf.single_tile_decoding;
-  if (cm->large_scale_tile) cm->seq_params.frame_id_numbers_present_flag = 0;
+  if (cm->large_scale_tile) seq_params->frame_id_numbers_present_flag = 0;
 
   cm->allow_ref_frame_mvs &= frame_might_allow_ref_frame_mvs(cm);
   // cm->allow_ref_frame_mvs needs to be written into the frame header while
@@ -5026,7 +5041,7 @@
          MAX_MODES * sizeof(*cpi->mode_chosen_counts));
 #endif
 
-  if (cm->seq_params.frame_id_numbers_present_flag) {
+  if (seq_params->frame_id_numbers_present_flag) {
     /* Non-normative definition of current_frame_id ("frame counter" with
      * wraparound) */
     const int frame_id_length = FRAME_ID_LENGTH;
@@ -5072,7 +5087,7 @@
           (frame_is_intra_only(cm) || !cm->show_frame) ? 0 : 1;
       break;
   }
-  cm->timing_info_present &= !cm->seq_params.reduced_still_picture_hdr;
+  cm->timing_info_present &= !seq_params->reduced_still_picture_hdr;
 
   if (cpi->sf.recode_loop == DISALLOW_RECODE) {
     if (encode_without_recode_loop(cpi) != AOM_CODEC_OK) return AOM_CODEC_ERROR;
@@ -5094,7 +5109,7 @@
   // fixed interval. Note the reconstruction error if it is the frame before
   // the force key frame
   if (cpi->rc.next_key_frame_forced && cpi->rc.frames_to_key == 1) {
-    if (cm->use_highbitdepth) {
+    if (seq_params->use_highbitdepth) {
       cpi->ambient_err =
           aom_highbd_get_y_sse(cpi->source, get_frame_new_buffer(cm));
     } else {
@@ -5108,12 +5123,14 @@
   }
 
   cm->frame_to_show = get_frame_new_buffer(cm);
-  cm->frame_to_show->color_primaries = cm->color_primaries;
-  cm->frame_to_show->transfer_characteristics = cm->transfer_characteristics;
-  cm->frame_to_show->matrix_coefficients = cm->matrix_coefficients;
-  cm->frame_to_show->monochrome = cm->seq_params.monochrome;
-  cm->frame_to_show->chroma_sample_position = cm->chroma_sample_position;
-  cm->frame_to_show->color_range = cm->color_range;
+  cm->frame_to_show->color_primaries = seq_params->color_primaries;
+  cm->frame_to_show->transfer_characteristics =
+      seq_params->transfer_characteristics;
+  cm->frame_to_show->matrix_coefficients = seq_params->matrix_coefficients;
+  cm->frame_to_show->monochrome = seq_params->monochrome;
+  cm->frame_to_show->chroma_sample_position =
+      seq_params->chroma_sample_position;
+  cm->frame_to_show->color_range = seq_params->color_range;
   cm->frame_to_show->render_width = cm->render_width;
   cm->frame_to_show->render_height = cm->render_height;
 
@@ -5151,7 +5168,7 @@
 
   if (skip_adapt) return AOM_CODEC_OK;
 
-  if (cm->seq_params.frame_id_numbers_present_flag) {
+  if (seq_params->frame_id_numbers_present_flag) {
     int i;
     // Update reference frame id values based on the value of refresh_frame_mask
     for (i = 0; i < REF_FRAMES; i++) {
@@ -5317,8 +5334,8 @@
                             int64_t time_stamp, int64_t end_time) {
   AV1_COMMON *const cm = &cpi->common;
   if (!cpi->denoise_and_model) {
-    cpi->denoise_and_model =
-        aom_denoise_and_model_alloc(cm->bit_depth, block_size, noise_level);
+    cpi->denoise_and_model = aom_denoise_and_model_alloc(
+        cm->seq_params.bit_depth, block_size, noise_level);
     if (!cpi->denoise_and_model) {
       aom_internal_error(&cm->error, AOM_CODEC_MEM_ERROR,
                          "Error allocating denoise and model");
@@ -5349,6 +5366,7 @@
                           YV12_BUFFER_CONFIG *sd, int64_t time_stamp,
                           int64_t end_time) {
   AV1_COMMON *const cm = &cpi->common;
+  const SequenceHeader *const seq_params = &cm->seq_params;
   struct aom_usec_timer timer;
   int res = 0;
   const int subsampling_x = sd->subsampling_x;
@@ -5372,19 +5390,20 @@
   aom_usec_timer_mark(&timer);
   cpi->time_receive_data += aom_usec_timer_elapsed(&timer);
 
-  if ((cm->profile == PROFILE_0) && !cm->seq_params.monochrome &&
+  if ((seq_params->profile == PROFILE_0) && !seq_params->monochrome &&
       (subsampling_x != 1 || subsampling_y != 1)) {
     aom_internal_error(&cm->error, AOM_CODEC_INVALID_PARAM,
                        "Non-4:2:0 color format requires profile 1 or 2");
     res = -1;
   }
-  if ((cm->profile == PROFILE_1) &&
+  if ((seq_params->profile == PROFILE_1) &&
       !(subsampling_x == 0 && subsampling_y == 0)) {
     aom_internal_error(&cm->error, AOM_CODEC_INVALID_PARAM,
                        "Profile 1 requires 4:4:4 color format");
     res = -1;
   }
-  if ((cm->profile == PROFILE_2) && (cm->bit_depth <= AOM_BITS_10) &&
+  if ((seq_params->profile == PROFILE_2) &&
+      (seq_params->bit_depth <= AOM_BITS_10) &&
       !(subsampling_x == 1 && subsampling_y == 0)) {
     aom_internal_error(&cm->error, AOM_CODEC_INVALID_PARAM,
                        "Profile 2 bit-depth < 10 requires 4:2:2 color format");
@@ -5556,9 +5575,9 @@
 #endif
   cpi->bytes += frame_bytes;
 
-  if (cm->use_highbitdepth) {
+  if (cm->seq_params.use_highbitdepth) {
     in_bit_depth = cpi->oxcf.input_bit_depth;
-    bit_depth = cm->bit_depth;
+    bit_depth = cm->seq_params.bit_depth;
   }
   if (cm->show_frame) {
     const YV12_BUFFER_CONFIG *orig = cpi->source;
@@ -5579,7 +5598,7 @@
       cpi->total_samples += psnr.samples[0];
       samples = psnr.samples[0];
       // TODO(yaowu): unify these two versions into one.
-      if (cm->use_highbitdepth)
+      if (cm->seq_params.use_highbitdepth)
         frame_ssim2 =
             aom_highbd_calc_ssim(orig, recon, &weight, bit_depth, in_bit_depth);
       else
@@ -5604,7 +5623,7 @@
 #endif
     }
     if (cpi->b_calculate_blockiness) {
-      if (!cm->use_highbitdepth) {
+      if (!cm->seq_params.use_highbitdepth) {
         const double frame_blockiness =
             av1_get_blockiness(orig->y_buffer, orig->y_stride, recon->y_buffer,
                                recon->y_stride, orig->y_width, orig->y_height);
@@ -5613,7 +5632,7 @@
       }
 
       if (cpi->b_calculate_consistency) {
-        if (!cm->use_highbitdepth) {
+        if (!cm->seq_params.use_highbitdepth) {
           const double this_inconsistency = aom_get_ssim_metrics(
               orig->y_buffer, orig->y_stride, recon->y_buffer, recon->y_stride,
               orig->y_width, orig->y_height, cpi->ssim_vars, &cpi->metrics, 1);
@@ -6201,8 +6220,8 @@
       *dest = *cm->frame_to_show;
       dest->y_width = cm->width;
       dest->y_height = cm->height;
-      dest->uv_width = cm->width >> cm->subsampling_x;
-      dest->uv_height = cm->height >> cm->subsampling_y;
+      dest->uv_width = cm->width >> cm->seq_params.subsampling_x;
+      dest->uv_height = cm->height >> cm->seq_params.subsampling_y;
       ret = 0;
     } else {
       ret = -1;
diff --git a/av1/encoder/firstpass.c b/av1/encoder/firstpass.c
index f81169c..ef0800c 100644
--- a/av1/encoder/firstpass.c
+++ b/av1/encoder/firstpass.c
@@ -486,6 +486,7 @@
   int mb_row, mb_col;
   MACROBLOCK *const x = &cpi->td.mb;
   AV1_COMMON *const cm = &cpi->common;
+  const SequenceHeader *const seq_params = &cm->seq_params;
   const int num_planes = av1_num_planes(cm);
   MACROBLOCKD *const xd = &x->e_mbd;
   TileInfo tile;
@@ -524,7 +525,7 @@
   double intra_factor;
   double brightness_factor;
   BufferPool *const pool = cm->buffer_pool;
-  const int qindex = find_fp_qindex(cm->bit_depth);
+  const int qindex = find_fp_qindex(seq_params->bit_depth);
   const int mb_scale = mi_size_wide[BLOCK_16X16];
 
   int *raw_motion_err_list;
@@ -555,11 +556,11 @@
   set_first_pass_params(cpi);
   av1_set_quantizer(cm, qindex);
 
-  av1_setup_block_planes(&x->e_mbd, cm->subsampling_x, cm->subsampling_y,
-                         num_planes);
+  av1_setup_block_planes(&x->e_mbd, seq_params->subsampling_x,
+                         seq_params->subsampling_y, num_planes);
 
   av1_setup_src_planes(x, cpi->source, 0, 0, num_planes);
-  av1_setup_dst_planes(xd->plane, cm->seq_params.sb_size, new_yv12, 0, 0, 0,
+  av1_setup_dst_planes(xd->plane, seq_params->sb_size, new_yv12, 0, 0, 0,
                        num_planes);
 
   if (!frame_is_intra_only(cm)) {
@@ -654,14 +655,14 @@
         image_data_start_row = mb_row;
       }
 
-      if (cm->use_highbitdepth) {
-        switch (cm->bit_depth) {
+      if (seq_params->use_highbitdepth) {
+        switch (seq_params->bit_depth) {
           case AOM_BITS_8: break;
           case AOM_BITS_10: this_error >>= 4; break;
           case AOM_BITS_12: this_error >>= 8; break;
           default:
             assert(0 &&
-                   "cm->bit_depth should be AOM_BITS_8, "
+                   "seq_params->bit_depth should be AOM_BITS_8, "
                    "AOM_BITS_10 or AOM_BITS_12");
             return;
         }
@@ -674,7 +675,7 @@
       else
         intra_factor += 1.0;
 
-      if (cm->use_highbitdepth)
+      if (seq_params->use_highbitdepth)
         level_sample = CONVERT_TO_SHORTPTR(x->plane[0].src.buf)[0];
       else
         level_sample = x->plane[0].src.buf[0];
@@ -1156,10 +1157,10 @@
     for (q = rc->best_quality; q < rc->worst_quality; ++q) {
       const double factor = calc_correction_factor(
           av_err_per_mb, ERR_DIVISOR - ediv_size_correction, FACTOR_PT_LOW,
-          FACTOR_PT_HIGH, q, cpi->common.bit_depth);
+          FACTOR_PT_HIGH, q, cpi->common.seq_params.bit_depth);
       const int bits_per_mb = av1_rc_bits_per_mb(
           INTER_FRAME, q, factor * speed_term * group_weight_factor,
-          cpi->common.bit_depth);
+          cpi->common.seq_params.bit_depth);
       if (bits_per_mb <= target_norm_bits_per_mb) break;
     }
 
@@ -1377,7 +1378,7 @@
                                double this_frame_mv_in_out, double max_boost) {
   double frame_boost;
   const double lq = av1_convert_qindex_to_q(
-      cpi->rc.avg_frame_qindex[INTER_FRAME], cpi->common.bit_depth);
+      cpi->rc.avg_frame_qindex[INTER_FRAME], cpi->common.seq_params.bit_depth);
   const double boost_q_correction = AOMMIN((0.5 + (lq * 0.015)), 1.5);
   int num_mbs = (cpi->oxcf.resize_mode != RESIZE_NONE) ? cpi->initial_mbs
                                                        : cpi->common.MBs;
@@ -2905,10 +2906,10 @@
   // Set a maximum and minimum interval for the GF group.
   // If the image appears almost completely static we can extend beyond this.
   {
-    int int_max_q = (int)(av1_convert_qindex_to_q(twopass->active_worst_quality,
-                                                  cpi->common.bit_depth));
-    int int_lbq = (int)(av1_convert_qindex_to_q(rc->last_boosted_qindex,
-                                                cpi->common.bit_depth));
+    int int_max_q = (int)(av1_convert_qindex_to_q(
+        twopass->active_worst_quality, cpi->common.seq_params.bit_depth));
+    int int_lbq = (int)(av1_convert_qindex_to_q(
+        rc->last_boosted_qindex, cpi->common.seq_params.bit_depth));
 
     active_min_gf_interval = rc->min_gf_interval + AOMMIN(2, int_max_q / 200);
     if (active_min_gf_interval > rc->max_gf_interval)
@@ -3909,7 +3910,7 @@
     twopass->baseline_active_worst_quality = tmp_q;
     rc->ni_av_qi = tmp_q;
     rc->last_q[INTER_FRAME] = tmp_q;
-    rc->avg_q = av1_convert_qindex_to_q(tmp_q, cm->bit_depth);
+    rc->avg_q = av1_convert_qindex_to_q(tmp_q, cm->seq_params.bit_depth);
     rc->avg_frame_qindex[INTER_FRAME] = tmp_q;
     rc->last_q[KEY_FRAME] = (tmp_q + cpi->oxcf.best_allowed_q) / 2;
     rc->avg_frame_qindex[KEY_FRAME] = rc->last_q[KEY_FRAME];
diff --git a/av1/encoder/pickcdef.c b/av1/encoder/pickcdef.c
index 4f62656..6d154a7 100644
--- a/av1/encoder/pickcdef.c
+++ b/av1/encoder/pickcdef.c
@@ -296,7 +296,7 @@
   int ydec[3];
   int pli;
   int cdef_count;
-  int coeff_shift = AOMMAX(cm->bit_depth - 8, 0);
+  int coeff_shift = AOMMAX(cm->seq_params.bit_depth - 8, 0);
   uint64_t best_tot_mse = (uint64_t)1 << 63;
   uint64_t tot_mse;
   int sb_count;
@@ -317,8 +317,8 @@
   DECLARE_ALIGNED(32, uint16_t, inbuf[CDEF_INBUF_SIZE]);
   uint16_t *in;
   DECLARE_ALIGNED(32, uint16_t, tmp_dst[1 << (MAX_SB_SIZE_LOG2 * 2)]);
-  quantizer =
-      av1_ac_quant_Q3(cm->base_qindex, 0, cm->bit_depth) >> (cm->bit_depth - 8);
+  quantizer = av1_ac_quant_Q3(cm->base_qindex, 0, cm->seq_params.bit_depth) >>
+              (cm->seq_params.bit_depth - 8);
   lambda = .12 * quantizer * quantizer / 256.;
 
   av1_setup_dst_planes(xd->plane, cm->seq_params.sb_size, frame, 0, 0, 0,
@@ -361,7 +361,7 @@
 
     for (r = 0; r < frame_height; ++r) {
       for (c = 0; c < frame_width; ++c) {
-        if (cm->use_highbitdepth) {
+        if (cm->seq_params.use_highbitdepth) {
           src[pli][r * stride[pli] + c] = CONVERT_TO_SHORTPTR(
               xd->plane[pli].dst.buf)[r * xd->plane[pli].dst.stride + c];
           ref_coeff[pli][r * stride[pli] + c] =
diff --git a/av1/encoder/picklpf.c b/av1/encoder/picklpf.c
index 5f802a7..461c3af 100644
--- a/av1/encoder/picklpf.c
+++ b/av1/encoder/picklpf.c
@@ -82,10 +82,8 @@
                           plane + 1, partial_frame);
 #endif
 
-  int highbd = 0;
-  highbd = cm->use_highbitdepth;
-
-  filt_err = aom_get_sse_plane(sd, cm->frame_to_show, plane, highbd);
+  filt_err = aom_get_sse_plane(sd, cm->frame_to_show, plane,
+                               cm->seq_params.use_highbitdepth);
 
   // Re-instate the unfiltered frame
   yv12_copy_plane(&cpi->last_frame_uf, cm->frame_to_show, plane);
@@ -202,7 +200,7 @@
   } else if (method >= LPF_PICK_FROM_Q) {
     const int min_filter_level = 0;
     const int max_filter_level = av1_get_max_filter_level(cpi);
-    const int q = av1_ac_quant_Q3(cm->base_qindex, 0, cm->bit_depth);
+    const int q = av1_ac_quant_Q3(cm->base_qindex, 0, cm->seq_params.bit_depth);
     // These values were determined by linear fitting the result of the
     // searched level for 8 bit depth:
     // Keyframes: filt_guess = q * 0.06699 - 1.60817
@@ -211,7 +209,7 @@
     // And high bit depth separately:
     // filt_guess = q * 0.316206 + 3.87252
     int filt_guess;
-    switch (cm->bit_depth) {
+    switch (cm->seq_params.bit_depth) {
       case AOM_BITS_8:
         filt_guess = (cm->frame_type == KEY_FRAME)
                          ? ROUND_POWER_OF_TWO(q * 17563 - 421574, 18)
@@ -229,7 +227,7 @@
                "or AOM_BITS_12");
         return;
     }
-    if (cm->bit_depth != AOM_BITS_8 && cm->frame_type == KEY_FRAME)
+    if (cm->seq_params.bit_depth != AOM_BITS_8 && cm->frame_type == KEY_FRAME)
       filt_guess -= 4;
     // TODO(chengchen): retrain the model for Y, U, V filter levels
     lf->filter_level[0] = clamp(filt_guess, min_filter_level, max_filter_level);
diff --git a/av1/encoder/pickrst.c b/av1/encoder/pickrst.c
index 93ea096..28b693b 100644
--- a/av1/encoder/pickrst.c
+++ b/av1/encoder/pickrst.c
@@ -163,8 +163,8 @@
   const int is_uv = plane > 0;
   const RestorationInfo *rsi = &cm->rst_info[plane];
   RestorationLineBuffers rlbs;
-  const int bit_depth = cm->bit_depth;
-  const int highbd = cm->use_highbitdepth;
+  const int bit_depth = cm->seq_params.bit_depth;
+  const int highbd = cm->seq_params.use_highbitdepth;
 
   const YV12_BUFFER_CONFIG *fts = cm->frame_to_show;
   // TODO(yunqing): For now, only use optimized LR filter in decoder. Can be
@@ -173,7 +173,8 @@
 
   av1_loop_restoration_filter_unit(
       limits, rui, &rsi->boundaries, &rlbs, tile_rect, rsc->tile_stripe0,
-      is_uv && cm->subsampling_x, is_uv && cm->subsampling_y, highbd, bit_depth,
+      is_uv && cm->seq_params.subsampling_x,
+      is_uv && cm->seq_params.subsampling_y, highbd, bit_depth,
       fts->buffers[plane], fts->strides[is_uv], rsc->dst->buffers[plane],
       rsc->dst->strides[is_uv], cm->rst_tmpbuf, optimized_lr);
 
@@ -540,8 +541,8 @@
 
   const MACROBLOCK *const x = rsc->x;
   const AV1_COMMON *const cm = rsc->cm;
-  const int highbd = cm->use_highbitdepth;
-  const int bit_depth = cm->bit_depth;
+  const int highbd = cm->seq_params.use_highbitdepth;
+  const int bit_depth = cm->seq_params.bit_depth;
 
   uint8_t *dgd_start =
       rsc->dgd_buffer + limits->v_start * rsc->dgd_stride + limits->h_start;
@@ -549,8 +550,8 @@
       rsc->src_buffer + limits->v_start * rsc->src_stride + limits->h_start;
 
   const int is_uv = rsc->plane > 0;
-  const int ss_x = is_uv && cm->subsampling_x;
-  const int ss_y = is_uv && cm->subsampling_y;
+  const int ss_x = is_uv && cm->seq_params.subsampling_x;
+  const int ss_y = is_uv && cm->seq_params.subsampling_y;
   const int procunit_width = RESTORATION_PROC_UNIT_SIZE >> ss_x;
   const int procunit_height = RESTORATION_PROC_UNIT_SIZE >> ss_y;
 
@@ -1067,7 +1068,7 @@
   double vfilterd[WIENER_WIN], hfilterd[WIENER_WIN];
 
   const AV1_COMMON *const cm = rsc->cm;
-  if (cm->use_highbitdepth) {
+  if (cm->seq_params.use_highbitdepth) {
     compute_stats_highbd(wiener_win, rsc->dgd_buffer, rsc->src_buffer,
                          limits->h_start, limits->h_end, limits->v_start,
                          limits->v_end, rsc->dgd_stride, rsc->src_stride, M, H);
@@ -1149,7 +1150,7 @@
   RestSearchCtxt *rsc = (RestSearchCtxt *)priv;
   RestUnitSearchInfo *rusi = &rsc->rusi[rest_unit_idx];
 
-  const int highbd = rsc->cm->use_highbitdepth;
+  const int highbd = rsc->cm->seq_params.use_highbitdepth;
   rusi->sse[RESTORE_NONE] = sse_restoration_unit(
       limits, rsc->src, rsc->cm->frame_to_show, rsc->plane, highbd);
 
@@ -1280,7 +1281,7 @@
     double best_cost = 0;
     RestorationType best_rtype = RESTORE_NONE;
 
-    const int highbd = rsc.cm->use_highbitdepth;
+    const int highbd = rsc.cm->seq_params.use_highbitdepth;
     extend_frame(rsc.dgd_buffer, rsc.plane_width, rsc.plane_height,
                  rsc.dgd_stride, RESTORATION_BORDER, RESTORATION_BORDER,
                  highbd);
diff --git a/av1/encoder/ratectrl.c b/av1/encoder/ratectrl.c
index f59f0e7..3aae014 100644
--- a/av1/encoder/ratectrl.c
+++ b/av1/encoder/ratectrl.c
@@ -421,9 +421,9 @@
     projected_size_based_on_q =
         av1_cyclic_refresh_estimate_bits_at_q(cpi, rate_correction_factor);
   } else {
-    projected_size_based_on_q =
-        av1_estimate_bits_at_q(cpi->common.frame_type, cm->base_qindex, MBs,
-                               rate_correction_factor, cm->bit_depth);
+    projected_size_based_on_q = av1_estimate_bits_at_q(
+        cpi->common.frame_type, cm->base_qindex, MBs, rate_correction_factor,
+        cm->seq_params.bit_depth);
   }
   // Work out a size correction factor.
   if (projected_size_based_on_q > FRAME_OVERHEAD_BITS)
@@ -495,7 +495,7 @@
           (int)av1_cyclic_refresh_rc_bits_per_mb(cpi, i, correction_factor);
     } else {
       bits_per_mb_at_this_q = (int)av1_rc_bits_per_mb(
-          cm->frame_type, i, correction_factor, cm->bit_depth);
+          cm->frame_type, i, correction_factor, cm->seq_params.bit_depth);
     }
 
     if (bits_per_mb_at_this_q <= target_bits_per_mb) {
@@ -643,7 +643,8 @@
   int active_worst_quality = calc_active_worst_quality_one_pass_cbr(cpi);
   int q;
   int *rtc_minq;
-  ASSIGN_MINQ_TABLE(cm->bit_depth, rtc_minq);
+  const int bit_depth = cm->seq_params.bit_depth;
+  ASSIGN_MINQ_TABLE(bit_depth, rtc_minq);
 
   if (frame_is_intra_only(cm)) {
     active_best_quality = rc->best_quality;
@@ -652,17 +653,17 @@
     // based on the ambient Q to reduce the risk of popping.
     if (rc->this_key_frame_forced) {
       int qindex = rc->last_boosted_qindex;
-      double last_boosted_q = av1_convert_qindex_to_q(qindex, cm->bit_depth);
-      int delta_qindex = av1_compute_qdelta(
-          rc, last_boosted_q, (last_boosted_q * 0.75), cm->bit_depth);
+      double last_boosted_q = av1_convert_qindex_to_q(qindex, bit_depth);
+      int delta_qindex = av1_compute_qdelta(rc, last_boosted_q,
+                                            (last_boosted_q * 0.75), bit_depth);
       active_best_quality = AOMMAX(qindex + delta_qindex, rc->best_quality);
     } else if (cm->current_video_frame > 0) {
       // not first frame of one pass and kf_boost is set
       double q_adj_factor = 1.0;
       double q_val;
 
-      active_best_quality = get_kf_active_quality(
-          rc, rc->avg_frame_qindex[KEY_FRAME], cm->bit_depth);
+      active_best_quality =
+          get_kf_active_quality(rc, rc->avg_frame_qindex[KEY_FRAME], bit_depth);
 
       // Allow somewhat lower kf minq with small image formats.
       if ((width * height) <= (352 * 288)) {
@@ -671,9 +672,9 @@
 
       // Convert the adjustment factor to a qindex delta
       // on active_best_quality.
-      q_val = av1_convert_qindex_to_q(active_best_quality, cm->bit_depth);
+      q_val = av1_convert_qindex_to_q(active_best_quality, bit_depth);
       active_best_quality +=
-          av1_compute_qdelta(rc, q_val, q_val * q_adj_factor, cm->bit_depth);
+          av1_compute_qdelta(rc, q_val, q_val * q_adj_factor, bit_depth);
     }
   } else if (!rc->is_src_frame_alt_ref &&
              (cpi->refresh_golden_frame || cpi->refresh_alt_ref_frame)) {
@@ -686,7 +687,7 @@
     } else {
       q = active_worst_quality;
     }
-    active_best_quality = get_gf_active_quality(rc, q, cm->bit_depth);
+    active_best_quality = get_gf_active_quality(rc, q, bit_depth);
   } else {
     // Use the lower of active_worst_quality and recent/average Q.
     if (cm->current_video_frame > 1) {
@@ -716,8 +717,8 @@
       !(cm->current_video_frame == 0)) {
     int qdelta = 0;
     aom_clear_system_state();
-    qdelta = av1_compute_qdelta_by_rate(
-        &cpi->rc, cm->frame_type, active_worst_quality, 2.0, cm->bit_depth);
+    qdelta = av1_compute_qdelta_by_rate(&cpi->rc, cm->frame_type,
+                                        active_worst_quality, 2.0, bit_depth);
     *top_index = active_worst_quality + qdelta;
     *top_index = AOMMAX(*top_index, *bottom_index);
   }
@@ -768,27 +769,27 @@
   int active_worst_quality = calc_active_worst_quality_one_pass_vbr(cpi);
   int q;
   int *inter_minq;
-  ASSIGN_MINQ_TABLE(cm->bit_depth, inter_minq);
+  const int bit_depth = cm->seq_params.bit_depth;
+  ASSIGN_MINQ_TABLE(bit_depth, inter_minq);
 
   if (frame_is_intra_only(cm)) {
     if (oxcf->rc_mode == AOM_Q) {
       const int qindex = cq_level;
-      const double q_val = av1_convert_qindex_to_q(qindex, cm->bit_depth);
+      const double q_val = av1_convert_qindex_to_q(qindex, bit_depth);
       const int delta_qindex =
-          av1_compute_qdelta(rc, q_val, q_val * 0.25, cm->bit_depth);
+          av1_compute_qdelta(rc, q_val, q_val * 0.25, bit_depth);
       active_best_quality = AOMMAX(qindex + delta_qindex, rc->best_quality);
     } else if (rc->this_key_frame_forced) {
       const int qindex = rc->last_boosted_qindex;
-      const double last_boosted_q =
-          av1_convert_qindex_to_q(qindex, cm->bit_depth);
+      const double last_boosted_q = av1_convert_qindex_to_q(qindex, bit_depth);
       const int delta_qindex = av1_compute_qdelta(
-          rc, last_boosted_q, last_boosted_q * 0.75, cm->bit_depth);
+          rc, last_boosted_q, last_boosted_q * 0.75, bit_depth);
       active_best_quality = AOMMAX(qindex + delta_qindex, rc->best_quality);
     } else {  // not first frame of one pass and kf_boost is set
       double q_adj_factor = 1.0;
 
-      active_best_quality = get_kf_active_quality(
-          rc, rc->avg_frame_qindex[KEY_FRAME], cm->bit_depth);
+      active_best_quality =
+          get_kf_active_quality(rc, rc->avg_frame_qindex[KEY_FRAME], bit_depth);
 
       // Allow somewhat lower kf minq with small image formats.
       if ((width * height) <= (352 * 288)) {
@@ -798,9 +799,9 @@
       // Convert the adjustment factor to a qindex delta on active_best_quality.
       {
         const double q_val =
-            av1_convert_qindex_to_q(active_best_quality, cm->bit_depth);
+            av1_convert_qindex_to_q(active_best_quality, bit_depth);
         active_best_quality +=
-            av1_compute_qdelta(rc, q_val, q_val * q_adj_factor, cm->bit_depth);
+            av1_compute_qdelta(rc, q_val, q_val * q_adj_factor, bit_depth);
       }
     }
   } else if (!rc->is_src_frame_alt_ref &&
@@ -815,30 +816,30 @@
     // For constrained quality dont allow Q less than the cq level
     if (oxcf->rc_mode == AOM_CQ) {
       if (q < cq_level) q = cq_level;
-      active_best_quality = get_gf_active_quality(rc, q, cm->bit_depth);
+      active_best_quality = get_gf_active_quality(rc, q, bit_depth);
       // Constrained quality use slightly lower active best.
       active_best_quality = active_best_quality * 15 / 16;
     } else if (oxcf->rc_mode == AOM_Q) {
       const int qindex = cq_level;
-      const double q_val = av1_convert_qindex_to_q(qindex, cm->bit_depth);
+      const double q_val = av1_convert_qindex_to_q(qindex, bit_depth);
       const int delta_qindex =
           (cpi->refresh_alt_ref_frame)
-              ? av1_compute_qdelta(rc, q_val, q_val * 0.40, cm->bit_depth)
-              : av1_compute_qdelta(rc, q_val, q_val * 0.50, cm->bit_depth);
+              ? av1_compute_qdelta(rc, q_val, q_val * 0.40, bit_depth)
+              : av1_compute_qdelta(rc, q_val, q_val * 0.50, bit_depth);
       active_best_quality = AOMMAX(qindex + delta_qindex, rc->best_quality);
     } else {
-      active_best_quality = get_gf_active_quality(rc, q, cm->bit_depth);
+      active_best_quality = get_gf_active_quality(rc, q, bit_depth);
     }
   } else {
     if (oxcf->rc_mode == AOM_Q) {
       const int qindex = cq_level;
-      const double q_val = av1_convert_qindex_to_q(qindex, cm->bit_depth);
+      const double q_val = av1_convert_qindex_to_q(qindex, bit_depth);
       const double delta_rate[FIXED_GF_INTERVAL] = { 0.50, 1.0, 0.85, 1.0,
                                                      0.70, 1.0, 0.85, 1.0 };
       const int delta_qindex = av1_compute_qdelta(
           rc, q_val,
           q_val * delta_rate[cm->current_video_frame % FIXED_GF_INTERVAL],
-          cm->bit_depth);
+          bit_depth);
       active_best_quality = AOMMAX(qindex + delta_qindex, rc->best_quality);
     } else {
       // Use the lower of active_worst_quality and recent/average Q.
@@ -868,12 +869,12 @@
     aom_clear_system_state();
     if (cm->frame_type == KEY_FRAME && !rc->this_key_frame_forced &&
         !(cm->current_video_frame == 0)) {
-      qdelta = av1_compute_qdelta_by_rate(
-          &cpi->rc, cm->frame_type, active_worst_quality, 2.0, cm->bit_depth);
+      qdelta = av1_compute_qdelta_by_rate(&cpi->rc, cm->frame_type,
+                                          active_worst_quality, 2.0, bit_depth);
     } else if (!rc->is_src_frame_alt_ref &&
                (cpi->refresh_golden_frame || cpi->refresh_alt_ref_frame)) {
       qdelta = av1_compute_qdelta_by_rate(
-          &cpi->rc, cm->frame_type, active_worst_quality, 1.75, cm->bit_depth);
+          &cpi->rc, cm->frame_type, active_worst_quality, 1.75, bit_depth);
     }
     *top_index = active_worst_quality + qdelta;
     *top_index = AOMMAX(*top_index, *bottom_index);
@@ -908,9 +909,9 @@
     INTER_FRAME, INTER_FRAME, INTER_FRAME, INTER_FRAME, INTER_FRAME, KEY_FRAME
   };
   const AV1_COMMON *const cm = &cpi->common;
-  int qdelta =
-      av1_compute_qdelta_by_rate(&cpi->rc, frame_type[rf_level], q,
-                                 rate_factor_deltas[rf_level], cm->bit_depth);
+  int qdelta = av1_compute_qdelta_by_rate(&cpi->rc, frame_type[rf_level], q,
+                                          rate_factor_deltas[rf_level],
+                                          cm->seq_params.bit_depth);
   return qdelta;
 }
 
@@ -927,7 +928,8 @@
   int active_worst_quality = cpi->twopass.active_worst_quality;
   int q;
   int *inter_minq;
-  ASSIGN_MINQ_TABLE(cm->bit_depth, inter_minq);
+  const int bit_depth = cm->seq_params.bit_depth;
+  ASSIGN_MINQ_TABLE(bit_depth, inter_minq);
 
 #if CUSTOMIZED_GF
   const int is_intrl_arf_boost =
@@ -948,16 +950,16 @@
       if (cpi->twopass.last_kfgroup_zeromotion_pct >= STATIC_MOTION_THRESH) {
         qindex = AOMMIN(rc->last_kf_qindex, rc->last_boosted_qindex);
         active_best_quality = qindex;
-        last_boosted_q = av1_convert_qindex_to_q(qindex, cm->bit_depth);
+        last_boosted_q = av1_convert_qindex_to_q(qindex, bit_depth);
         delta_qindex = av1_compute_qdelta(rc, last_boosted_q,
-                                          last_boosted_q * 1.25, cm->bit_depth);
+                                          last_boosted_q * 1.25, bit_depth);
         active_worst_quality =
             AOMMIN(qindex + delta_qindex, active_worst_quality);
       } else {
         qindex = rc->last_boosted_qindex;
-        last_boosted_q = av1_convert_qindex_to_q(qindex, cm->bit_depth);
+        last_boosted_q = av1_convert_qindex_to_q(qindex, bit_depth);
         delta_qindex = av1_compute_qdelta(rc, last_boosted_q,
-                                          last_boosted_q * 0.75, cm->bit_depth);
+                                          last_boosted_q * 0.75, bit_depth);
         active_best_quality = AOMMAX(qindex + delta_qindex, rc->best_quality);
       }
     } else {
@@ -967,7 +969,7 @@
 
       // Baseline value derived from cpi->active_worst_quality and kf boost.
       active_best_quality =
-          get_kf_active_quality(rc, active_worst_quality, cm->bit_depth);
+          get_kf_active_quality(rc, active_worst_quality, bit_depth);
 
       // Allow somewhat lower kf minq with small image formats.
       if ((width * height) <= (352 * 288)) {
@@ -979,9 +981,9 @@
 
       // Convert the adjustment factor to a qindex delta
       // on active_best_quality.
-      q_val = av1_convert_qindex_to_q(active_best_quality, cm->bit_depth);
+      q_val = av1_convert_qindex_to_q(active_best_quality, bit_depth);
       active_best_quality +=
-          av1_compute_qdelta(rc, q_val, q_val * q_adj_factor, cm->bit_depth);
+          av1_compute_qdelta(rc, q_val, q_val * q_adj_factor, bit_depth);
     }
   } else if (!rc->is_src_frame_alt_ref &&
              (cpi->refresh_golden_frame || is_intrl_arf_boost ||
@@ -999,7 +1001,7 @@
     if (oxcf->rc_mode == AOM_CQ) {
       if (q < cq_level) q = cq_level;
 
-      active_best_quality = get_gf_active_quality(rc, q, cm->bit_depth);
+      active_best_quality = get_gf_active_quality(rc, q, bit_depth);
 
       // Constrained quality use slightly lower active best.
       active_best_quality = active_best_quality * 15 / 16;
@@ -1008,7 +1010,7 @@
       if (!cpi->refresh_alt_ref_frame && !is_intrl_arf_boost) {
         active_best_quality = cq_level;
       } else {
-        active_best_quality = get_gf_active_quality(rc, q, cm->bit_depth);
+        active_best_quality = get_gf_active_quality(rc, q, bit_depth);
 #if USE_SYMM_MULTI_LAYER
         if (cpi->new_bwdref_update_rule && is_intrl_arf_boost) {
           int this_height = gf_group->pyramid_level[gf_group->index];
@@ -1027,7 +1029,7 @@
 #endif
       }
     } else {
-      active_best_quality = get_gf_active_quality(rc, q, cm->bit_depth);
+      active_best_quality = get_gf_active_quality(rc, q, bit_depth);
 #if USE_SYMM_MULTI_LAYER
       if (cpi->new_bwdref_update_rule && is_intrl_arf_boost) {
         int this_height = gf_group->pyramid_level[gf_group->index];
@@ -1084,7 +1086,7 @@
   // Modify active_best_quality for downscaled normal frames.
   if (av1_frame_scaled(cm) && !frame_is_kf_gf_arf(cpi)) {
     int qdelta = av1_compute_qdelta_by_rate(
-        rc, cm->frame_type, active_best_quality, 2.0, cm->bit_depth);
+        rc, cm->frame_type, active_best_quality, 2.0, bit_depth);
     active_best_quality =
         AOMMAX(active_best_quality + qdelta, rc->best_quality);
   }
@@ -1266,7 +1268,7 @@
       rc->avg_frame_qindex[INTER_FRAME] =
           ROUND_POWER_OF_TWO(3 * rc->avg_frame_qindex[INTER_FRAME] + qindex, 2);
       rc->ni_frames++;
-      rc->tot_q += av1_convert_qindex_to_q(qindex, cm->bit_depth);
+      rc->tot_q += av1_convert_qindex_to_q(qindex, cm->seq_params.bit_depth);
       rc->avg_q = rc->tot_q / rc->ni_frames;
       // Calculate the average Q for normal inter frames (not key or GFU
       // frames).
diff --git a/av1/encoder/rd.c b/av1/encoder/rd.c
index 9f8be95..c4d4777 100644
--- a/av1/encoder/rd.c
+++ b/av1/encoder/rd.c
@@ -354,9 +354,10 @@
 };
 
 int av1_compute_rd_mult(const AV1_COMP *cpi, int qindex) {
-  const int64_t q = av1_dc_quant_Q3(qindex, 0, cpi->common.bit_depth);
+  const int64_t q =
+      av1_dc_quant_Q3(qindex, 0, cpi->common.seq_params.bit_depth);
   int64_t rdmult = 0;
-  switch (cpi->common.bit_depth) {
+  switch (cpi->common.seq_params.bit_depth) {
     case AOM_BITS_8: rdmult = 88 * q * q / 24; break;
     case AOM_BITS_10: rdmult = ROUND_POWER_OF_TWO(88 * q * q / 24, 4); break;
     case AOM_BITS_12: rdmult = ROUND_POWER_OF_TWO(88 * q * q / 24, 8); break;
@@ -391,7 +392,7 @@
 }
 
 void av1_initialize_me_consts(const AV1_COMP *cpi, MACROBLOCK *x, int qindex) {
-  switch (cpi->common.bit_depth) {
+  switch (cpi->common.seq_params.bit_depth) {
     case AOM_BITS_8:
       x->sadperbit16 = sad_per_bit16lut_8[qindex];
       x->sadperbit4 = sad_per_bit4lut_8[qindex];
@@ -417,7 +418,7 @@
         clamp(av1_get_qindex(&cm->seg, segment_id, cm->base_qindex) +
                   cm->y_dc_delta_q,
               0, MAXQ);
-    const int q = compute_rd_thresh_factor(qindex, cm->bit_depth);
+    const int q = compute_rd_thresh_factor(qindex, cm->seq_params.bit_depth);
 
     for (bsize = 0; bsize < BLOCK_SIZES_ALL; ++bsize) {
       // Threshold here seems unnecessarily harsh but fine given actual
diff --git a/av1/encoder/rdopt.c b/av1/encoder/rdopt.c
index d66c4c3..fef6d28 100644
--- a/av1/encoder/rdopt.c
+++ b/av1/encoder/rdopt.c
@@ -1157,7 +1157,7 @@
     assert(bw <= 32);
     assert(bh <= 32);
     assert(((bw - 1) >> w_shift) + (((bh - 1) >> h_shift) << 2) == 15);
-    if (cpi->common.use_highbitdepth) {
+    if (cpi->common.seq_params.use_highbitdepth) {
       const uint16_t *src16 = CONVERT_TO_SHORTPTR(src);
       const uint16_t *dst16 = CONVERT_TO_SHORTPTR(dst);
       for (int i = 0; i < bh; ++i)
@@ -3342,7 +3342,7 @@
       const int n_cache = av1_get_palette_cache(xd, 0, color_cache);
       palette_mode_cost +=
           av1_palette_color_cost_y(&mbmi->palette_mode_info, color_cache,
-                                   n_cache, cpi->common.bit_depth);
+                                   n_cache, cpi->common.seq_params.bit_depth);
       palette_mode_cost +=
           av1_cost_color_map(x, 0, bsize, mbmi->tx_size, PALETTE_MAP);
       total_rate += palette_mode_cost;
@@ -3393,8 +3393,8 @@
           write_uniform_cost(plt_size, color_map[0]);
       uint16_t color_cache[2 * PALETTE_MAX_SIZE];
       const int n_cache = av1_get_palette_cache(xd, 1, color_cache);
-      palette_mode_cost += av1_palette_color_cost_uv(pmi, color_cache, n_cache,
-                                                     cpi->common.bit_depth);
+      palette_mode_cost += av1_palette_color_cost_uv(
+          pmi, color_cache, n_cache, cpi->common.seq_params.bit_depth);
       palette_mode_cost +=
           av1_cost_color_map(x, 1, bsize, mbmi->tx_size, PALETTE_MAP);
       total_rate += palette_mode_cost;
@@ -3534,10 +3534,10 @@
     return;
   }
   PALETTE_MODE_INFO *const pmi = &mbmi->palette_mode_info;
-  if (cpi->common.use_highbitdepth)
+  if (cpi->common.seq_params.use_highbitdepth)
     for (int i = 0; i < k; ++i)
-      pmi->palette_colors[i] =
-          clip_pixel_highbd((int)centroids[i], cpi->common.bit_depth);
+      pmi->palette_colors[i] = clip_pixel_highbd(
+          (int)centroids[i], cpi->common.seq_params.bit_depth);
   else
     for (int i = 0; i < k; ++i)
       pmi->palette_colors[i] = clip_pixel(centroids[i]);
@@ -3590,6 +3590,7 @@
   MB_MODE_INFO *const mbmi = xd->mi[0];
   assert(!is_inter_block(mbmi));
   assert(av1_allow_palette(cpi->common.allow_screen_content_tools, bsize));
+  const SequenceHeader *const seq_params = &cpi->common.seq_params;
   int colors, n;
   const int src_stride = x->plane[0].src.stride;
   const uint8_t *const src = x->plane[0].src.buf;
@@ -3599,9 +3600,9 @@
                            &cols);
 
   int count_buf[1 << 12];  // Maximum (1 << 12) color levels.
-  if (cpi->common.use_highbitdepth)
+  if (seq_params->use_highbitdepth)
     colors = av1_count_colors_highbd(src, src_stride, rows, cols,
-                                     cpi->common.bit_depth, count_buf);
+                                     seq_params->bit_depth, count_buf);
   else
     colors = av1_count_colors(src, src_stride, rows, cols, count_buf);
   mbmi->filter_intra_mode_info.use_filter_intra = 0;
@@ -3613,12 +3614,12 @@
     int centroids[PALETTE_MAX_SIZE];
     int lb, ub, val;
     uint16_t *src16 = CONVERT_TO_SHORTPTR(src);
-    if (cpi->common.use_highbitdepth)
+    if (seq_params->use_highbitdepth)
       lb = ub = src16[0];
     else
       lb = ub = src[0];
 
-    if (cpi->common.use_highbitdepth) {
+    if (seq_params->use_highbitdepth) {
       for (r = 0; r < rows; ++r) {
         for (c = 0; c < cols; ++c) {
           val = src16[r * src_stride + c];
@@ -3652,7 +3653,7 @@
     int top_colors[PALETTE_MAX_SIZE] = { 0 };
     for (i = 0; i < AOMMIN(colors, PALETTE_MAX_SIZE); ++i) {
       int max_count = 0;
-      for (int j = 0; j < (1 << cpi->common.bit_depth); ++j) {
+      for (int j = 0; j < (1 << seq_params->bit_depth); ++j) {
         if (count_buf[j] > max_count) {
           max_count = count_buf[j];
           top_colors[i] = j;
@@ -5581,6 +5582,7 @@
       av1_allow_palette(cpi->common.allow_screen_content_tools, mbmi->sb_type));
   PALETTE_MODE_INFO *const pmi = &mbmi->palette_mode_info;
   const BLOCK_SIZE bsize = mbmi->sb_type;
+  const SequenceHeader *const seq_params = &cpi->common.seq_params;
   int this_rate;
   int64_t this_rd;
   int colors_u, colors_v, colors;
@@ -5596,11 +5598,11 @@
   mbmi->uv_mode = UV_DC_PRED;
 
   int count_buf[1 << 12];  // Maximum (1 << 12) color levels.
-  if (cpi->common.use_highbitdepth) {
+  if (seq_params->use_highbitdepth) {
     colors_u = av1_count_colors_highbd(src_u, src_stride, rows, cols,
-                                       cpi->common.bit_depth, count_buf);
+                                       seq_params->bit_depth, count_buf);
     colors_v = av1_count_colors_highbd(src_v, src_stride, rows, cols,
-                                       cpi->common.bit_depth, count_buf);
+                                       seq_params->bit_depth, count_buf);
   } else {
     colors_u = av1_count_colors(src_u, src_stride, rows, cols, count_buf);
     colors_v = av1_count_colors(src_v, src_stride, rows, cols, count_buf);
@@ -5620,7 +5622,7 @@
 
     uint16_t *src_u16 = CONVERT_TO_SHORTPTR(src_u);
     uint16_t *src_v16 = CONVERT_TO_SHORTPTR(src_v);
-    if (cpi->common.use_highbitdepth) {
+    if (seq_params->use_highbitdepth) {
       lb_u = src_u16[0];
       ub_u = src_u16[0];
       lb_v = src_v16[0];
@@ -5634,7 +5636,7 @@
 
     for (r = 0; r < rows; ++r) {
       for (c = 0; c < cols; ++c) {
-        if (cpi->common.use_highbitdepth) {
+        if (seq_params->use_highbitdepth) {
           val_u = src_u16[r * src_stride + c];
           val_v = src_v16[r * src_stride + c];
           data[(r * cols + c) * 2] = val_u;
@@ -5683,9 +5685,9 @@
       pmi->palette_size[1] = n;
       for (i = 1; i < 3; ++i) {
         for (j = 0; j < n; ++j) {
-          if (cpi->common.use_highbitdepth)
+          if (seq_params->use_highbitdepth)
             pmi->palette_colors[i * PALETTE_MAX_SIZE + j] = clip_pixel_highbd(
-                (int)centroids[j * 2 + i - 1], cpi->common.bit_depth);
+                (int)centroids[j * 2 + i - 1], seq_params->bit_depth);
           else
             pmi->palette_colors[i * PALETTE_MAX_SIZE + j] =
                 clip_pixel((int)centroids[j * 2 + i - 1]);
@@ -6033,8 +6035,9 @@
     *mode_uv = UV_DC_PRED;
     return;
   }
-  xd->cfl.is_chroma_reference = is_chroma_reference(
-      mi_row, mi_col, bsize, cm->subsampling_x, cm->subsampling_y);
+  xd->cfl.is_chroma_reference =
+      is_chroma_reference(mi_row, mi_col, bsize, cm->seq_params.subsampling_x,
+                          cm->seq_params.subsampling_y);
   bsize = scale_chroma_bsize(bsize, xd->plane[AOM_PLANE_U].subsampling_x,
                              xd->plane[AOM_PLANE_U].subsampling_y);
   // Only store reconstructed luma when there's chroma RDO. When there's no
@@ -9305,8 +9308,9 @@
   if (intra_yrd < best_rd) {
     // Only store reconstructed luma when there's chroma RDO. When there's no
     // chroma RDO, the reconstructed luma will be stored in encode_superblock().
-    xd->cfl.is_chroma_reference = is_chroma_reference(
-        mi_row, mi_col, bsize, cm->subsampling_x, cm->subsampling_y);
+    xd->cfl.is_chroma_reference =
+        is_chroma_reference(mi_row, mi_col, bsize, cm->seq_params.subsampling_x,
+                            cm->seq_params.subsampling_y);
     xd->cfl.store_y = store_cfl_required_rdo(cm, x);
     if (xd->cfl.store_y) {
       // Restore reconstructed luma values.
@@ -9373,7 +9377,7 @@
 
   for (r = 0; r < rows; ++r) {
     for (c = 0; c < cols; ++c) {
-      if (cpi->common.use_highbitdepth) {
+      if (cpi->common.seq_params.use_highbitdepth) {
         data[(r * cols + c) * 2] = src_u16[r * src_stride + c];
         data[(r * cols + c) * 2 + 1] = src_v16[r * src_stride + c];
       } else {
@@ -10151,7 +10155,7 @@
       av1_allow_palette(cm->allow_screen_content_tools, mbmi->sb_type);
   const int *const intra_mode_cost = x->mbmode_cost[size_group_lookup[bsize]];
   const int intra_cost_penalty = av1_get_intra_cost_penalty(
-      cm->base_qindex, cm->y_dc_delta_q, cm->bit_depth);
+      cm->base_qindex, cm->y_dc_delta_q, cm->seq_params.bit_depth);
   const int rows = block_size_high[bsize];
   const int cols = block_size_wide[bsize];
   const int num_planes = av1_num_planes(cm);
diff --git a/av1/encoder/temporal_filter.c b/av1/encoder/temporal_filter.c
index 250feab..d7e4f4e 100644
--- a/av1/encoder/temporal_filter.c
+++ b/av1/encoder/temporal_filter.c
@@ -535,10 +535,10 @@
   // Adjust the strength based on active max q.
   if (cpi->common.current_video_frame > 1)
     q = ((int)av1_convert_qindex_to_q(cpi->rc.avg_frame_qindex[INTER_FRAME],
-                                      cpi->common.bit_depth));
+                                      cpi->common.seq_params.bit_depth));
   else
     q = ((int)av1_convert_qindex_to_q(cpi->rc.avg_frame_qindex[KEY_FRAME],
-                                      cpi->common.bit_depth));
+                                      cpi->common.seq_params.bit_depth));
   if (q > 16) {
     strength = oxcf->arnr_strength;
   } else {
diff --git a/test/resize_test.cc b/test/resize_test.cc
index e1c4e9f..b270b83 100644
--- a/test/resize_test.cc
+++ b/test/resize_test.cc
@@ -546,12 +546,6 @@
 #endif
 }
 
-aom_img_fmt_t CspForFrameNumber(int frame) {
-  if (frame < 10) return AOM_IMG_FMT_I420;
-  if (frame < 20) return AOM_IMG_FMT_I444;
-  return AOM_IMG_FMT_I420;
-}
-
 class ResizeCspTest : public ResizeTest {
  protected:
 #if WRITE_COMPRESSED_STREAM
@@ -580,20 +574,6 @@
 #endif
   }
 
-  virtual void PreEncodeFrameHook(libaom_test::VideoSource *video,
-                                  libaom_test::Encoder *encoder) {
-    if (CspForFrameNumber(video->frame()) != AOM_IMG_FMT_I420 &&
-        cfg_.g_profile != 1) {
-      cfg_.g_profile = 1;
-      encoder->Config(&cfg_);
-    }
-    if (CspForFrameNumber(video->frame()) == AOM_IMG_FMT_I420 &&
-        cfg_.g_profile != 0) {
-      cfg_.g_profile = 0;
-      encoder->Config(&cfg_);
-    }
-  }
-
   virtual void PSNRPktHook(const aom_codec_cx_pkt_t *pkt) {
     if (frame0_psnr_ == 0.) frame0_psnr_ = pkt->data.psnr.psnr[0];
     EXPECT_NEAR(pkt->data.psnr.psnr[0], frame0_psnr_, 2.0);
@@ -621,19 +601,13 @@
 
 class ResizingCspVideoSource : public ::libaom_test::DummyVideoSource {
  public:
-  ResizingCspVideoSource() {
+  explicit ResizingCspVideoSource(aom_img_fmt_t image_format) {
     SetSize(kInitialWidth, kInitialHeight);
+    SetImageFormat(image_format);
     limit_ = 30;
   }
 
   virtual ~ResizingCspVideoSource() {}
-
- protected:
-  virtual void Next() {
-    ++frame_;
-    SetImageFormat(CspForFrameNumber(frame_));
-    FillFrame();
-  }
 };
 
 #if (defined(DISABLE_TRELLISQ_SEARCH) && DISABLE_TRELLISQ_SEARCH)
@@ -641,14 +615,19 @@
 #else
 TEST_P(ResizeCspTest, TestResizeCspWorks) {
 #endif
-  ResizingCspVideoSource video;
-  init_flags_ = AOM_CODEC_USE_PSNR;
-  cfg_.rc_min_quantizer = cfg_.rc_max_quantizer = 48;
-  cfg_.g_lag_in_frames = 0;
-  ASSERT_NO_FATAL_FAILURE(RunLoop(&video));
+  const aom_img_fmt_t image_formats[] = { AOM_IMG_FMT_I420, AOM_IMG_FMT_I444 };
+  for (size_t i = 0; i < GTEST_ARRAY_SIZE_(image_formats); ++i) {
+    ResizingCspVideoSource video(image_formats[i]);
+    init_flags_ = AOM_CODEC_USE_PSNR;
+    cfg_.rc_min_quantizer = cfg_.rc_max_quantizer = 48;
+    cfg_.g_lag_in_frames = 0;
+    cfg_.g_profile = (image_formats[i] == AOM_IMG_FMT_I420) ? 0 : 1;
+    ASSERT_NO_FATAL_FAILURE(RunLoop(&video));
 
-  // Check we decoded the same number of frames as we attempted to encode
-  ASSERT_EQ(frame_info_list_.size(), video.limit());
+    // Check we decoded the same number of frames as we attempted to encode
+    ASSERT_EQ(frame_info_list_.size(), video.limit());
+    frame_info_list_.clear();
+  }
 }
 
 AV1_INSTANTIATE_TEST_CASE(ResizeTest,