av1/common/alloccommon.c - aom - Git at Google

 /*
  *
  * Copyright (c) 2016, Alliance for Open Media. All rights reserved
  *
  * This source code is subject to the terms of the BSD 2 Clause License and
  * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
  * was not distributed with this source code in the LICENSE file, you can
  * obtain it at www.aomedia.org/license/software. If the Alliance for Open
  * Media Patent License 1.0 was not distributed with this source code in the
  * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
  */

 #include "config/aom_config.h"

 #include "aom_mem/aom_mem.h"

 #include "av1/common/alloccommon.h"
 #include "av1/common/blockd.h"
 #include "av1/common/entropymode.h"
 #include "av1/common/entropymv.h"
 #include "av1/common/onyxc_int.h"

 int av1_get_MBs(int width, int height) {
   const int aligned_width = ALIGN_POWER_OF_TWO(width, 3);
   const int aligned_height = ALIGN_POWER_OF_TWO(height, 3);
   const int mi_cols = aligned_width >> MI_SIZE_LOG2;
   const int mi_rows = aligned_height >> MI_SIZE_LOG2;

   const int mb_cols = (mi_cols + 2) >> 2;
   const int mb_rows = (mi_rows + 2) >> 2;
   return mb_rows * mb_cols;
 }

 #if LOOP_FILTER_BITMASK
 static int alloc_loop_filter_mask(AV1_COMMON *cm) {
   aom_free(cm->lf.lfm);
   cm->lf.lfm = NULL;

   // Each lfm holds bit masks for all the 4x4 blocks in a max
   // 64x64 (128x128 for ext_partitions) region.  The stride
   // and rows are rounded up / truncated to a multiple of 16
   // (32 for ext_partition).
   cm->lf.lfm_stride = (cm->mi_cols + (MI_SIZE_64X64 - 1)) >> MIN_MIB_SIZE_LOG2;
   cm->lf.lfm_num = ((cm->mi_rows + (MI_SIZE_64X64 - 1)) >> MIN_MIB_SIZE_LOG2) *
                    cm->lf.lfm_stride;
   cm->lf.lfm =
       (LoopFilterMask *)aom_calloc(cm->lf.lfm_num, sizeof(*cm->lf.lfm));
   if (!cm->lf.lfm) return 1;

   unsigned int i;
   for (i = 0; i < cm->lf.lfm_num; ++i) av1_zero(cm->lf.lfm[i]);

   return 0;
 }

 static void free_loop_filter_mask(AV1_COMMON *cm) {
   if (cm->lf.lfm == NULL) return;

   aom_free(cm->lf.lfm);
   cm->lf.lfm = NULL;
   cm->lf.lfm_num = 0;
   cm->lf.lfm_stride = 0;
 }
 #endif

 void av1_set_mb_mi(AV1_COMMON *cm, int width, int height) {
   // Ensure that the decoded width and height are both multiples of
   // 8 luma pixels (note: this may only be a multiple of 4 chroma pixels if
   // subsampling is used).
   // This simplifies the implementation of various experiments,
   // eg. cdef, which operates on units of 8x8 luma pixels.
   const int aligned_width = ALIGN_POWER_OF_TWO(width, 3);
   const int aligned_height = ALIGN_POWER_OF_TWO(height, 3);

   cm->mi_cols = aligned_width >> MI_SIZE_LOG2;
   cm->mi_rows = aligned_height >> MI_SIZE_LOG2;
   cm->mi_stride = calc_mi_size(cm->mi_cols);

   cm->mb_cols = (cm->mi_cols + 2) >> 2;
   cm->mb_rows = (cm->mi_rows + 2) >> 2;
   cm->MBs = cm->mb_rows * cm->mb_cols;

 #if LOOP_FILTER_BITMASK
   alloc_loop_filter_mask(cm);
 #endif
 }

 void av1_free_ref_frame_buffers(BufferPool *pool) {
   int i;

   for (i = 0; i < FRAME_BUFFERS; ++i) {
     if (pool->frame_bufs[i].ref_count > 0 &&
         pool->frame_bufs[i].raw_frame_buffer.data != NULL) {
       pool->release_fb_cb(pool->cb_priv, &pool->frame_bufs[i].raw_frame_buffer);
       pool->frame_bufs[i].raw_frame_buffer.data = NULL;
       pool->frame_bufs[i].raw_frame_buffer.size = 0;
       pool->frame_bufs[i].raw_frame_buffer.priv = NULL;
       pool->frame_bufs[i].ref_count = 0;
     }
     aom_free(pool->frame_bufs[i].mvs);
     pool->frame_bufs[i].mvs = NULL;
     aom_free(pool->frame_bufs[i].seg_map);
     pool->frame_bufs[i].seg_map = NULL;
     aom_free_frame_buffer(&pool->frame_bufs[i].buf);
   }
 }

 // Assumes cm->rst_info[p].restoration_unit_size is already initialized
 void av1_alloc_restoration_buffers(AV1_COMMON *cm) {
   const int num_planes = av1_num_planes(cm);
   for (int p = 0; p < num_planes; ++p)
     av1_alloc_restoration_struct(cm, &cm->rst_info[p], p > 0);

   if (cm->rst_tmpbuf == NULL) {
     CHECK_MEM_ERROR(cm, cm->rst_tmpbuf,
                     (int32_t *)aom_memalign(16, RESTORATION_TMPBUF_SIZE));
   }

   if (cm->rlbs == NULL) {
     CHECK_MEM_ERROR(cm, cm->rlbs, aom_malloc(sizeof(RestorationLineBuffers)));
   }

   // For striped loop restoration, we divide each row of tiles into "stripes",
   // of height 64 luma pixels but with an offset by RESTORATION_UNIT_OFFSET
   // luma pixels to match the output from CDEF. We will need to store 2 *
   // RESTORATION_CTX_VERT lines of data for each stripe, and also need to be
   // able to quickly answer the question "Where is the <n>'th stripe for tile
   // row <m>?" To make that efficient, we generate the rst_last_stripe array.
   int num_stripes = 0;
   for (int i = 0; i < cm->tile_rows; ++i) {
     TileInfo tile_info;
     av1_tile_set_row(&tile_info, cm, i);
     const int mi_h = tile_info.mi_row_end - tile_info.mi_row_start;
     const int ext_h = RESTORATION_UNIT_OFFSET + (mi_h << MI_SIZE_LOG2);
     const int tile_stripes = (ext_h + 63) / 64;
     num_stripes += tile_stripes;
   }

   // 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->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->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
                          << use_highbd;
     RestorationStripeBoundaries *boundaries = &cm->rst_info[p].boundaries;

     if (buf_size != boundaries->stripe_boundary_size ||
         boundaries->stripe_boundary_above == NULL ||
         boundaries->stripe_boundary_below == NULL) {
       aom_free(boundaries->stripe_boundary_above);
       aom_free(boundaries->stripe_boundary_below);

       CHECK_MEM_ERROR(cm, boundaries->stripe_boundary_above,
                       (uint8_t *)aom_memalign(32, buf_size));
       CHECK_MEM_ERROR(cm, boundaries->stripe_boundary_below,
                       (uint8_t *)aom_memalign(32, buf_size));

       boundaries->stripe_boundary_size = buf_size;
     }
     boundaries->stripe_boundary_stride = stride;
   }
 }

 void av1_free_restoration_buffers(AV1_COMMON *cm) {
   int p;
   for (p = 0; p < MAX_MB_PLANE; ++p)
     av1_free_restoration_struct(&cm->rst_info[p]);
   aom_free(cm->rst_tmpbuf);
   cm->rst_tmpbuf = NULL;
   aom_free(cm->rlbs);
   cm->rlbs = NULL;
   for (p = 0; p < MAX_MB_PLANE; ++p) {
     RestorationStripeBoundaries *boundaries = &cm->rst_info[p].boundaries;
     aom_free(boundaries->stripe_boundary_above);
     aom_free(boundaries->stripe_boundary_below);
     boundaries->stripe_boundary_above = NULL;
     boundaries->stripe_boundary_below = NULL;
   }

   aom_free_frame_buffer(&cm->rst_frame);
 }

 void av1_free_above_context_buffers(AV1_COMMON *cm,
                                     int num_free_above_contexts) {
   int i;
   const int num_planes = cm->num_allocated_above_context_planes;

   for (int tile_row = 0; tile_row < num_free_above_contexts; tile_row++) {
     for (i = 0; i < num_planes; i++) {
       aom_free(cm->above_context[i][tile_row]);
       cm->above_context[i][tile_row] = NULL;
     }
     aom_free(cm->above_seg_context[tile_row]);
     cm->above_seg_context[tile_row] = NULL;

     aom_free(cm->above_txfm_context[tile_row]);
     cm->above_txfm_context[tile_row] = NULL;
   }
   for (i = 0; i < num_planes; i++) {
     aom_free(cm->above_context[i]);
     cm->above_context[i] = NULL;
   }
   aom_free(cm->above_seg_context);
   cm->above_seg_context = NULL;

   aom_free(cm->above_txfm_context);
   cm->above_txfm_context = NULL;

   cm->num_allocated_above_contexts = 0;
   cm->num_allocated_above_context_mi_col = 0;
   cm->num_allocated_above_context_planes = 0;
 }

 void av1_free_context_buffers(AV1_COMMON *cm) {
   cm->free_mi(cm);

   av1_free_above_context_buffers(cm, cm->num_allocated_above_contexts);

 #if LOOP_FILTER_BITMASK
   free_loop_filter_mask(cm);
 #endif
 }

 int av1_alloc_above_context_buffers(AV1_COMMON *cm,
                                     int num_alloc_above_contexts) {
   const int num_planes = av1_num_planes(cm);
   int plane_idx;
   const int aligned_mi_cols =
       ALIGN_POWER_OF_TWO(cm->mi_cols, MAX_MIB_SIZE_LOG2);

   // Allocate above context buffers
   cm->num_allocated_above_contexts = num_alloc_above_contexts;
   cm->num_allocated_above_context_mi_col = aligned_mi_cols;
   cm->num_allocated_above_context_planes = num_planes;
   for (plane_idx = 0; plane_idx < num_planes; plane_idx++) {
     cm->above_context[plane_idx] = (ENTROPY_CONTEXT **)aom_calloc(
         num_alloc_above_contexts, sizeof(cm->above_context[0]));
     if (!cm->above_context[plane_idx]) return 1;
   }

   cm->above_seg_context = (PARTITION_CONTEXT **)aom_calloc(
       num_alloc_above_contexts, sizeof(cm->above_seg_context));
   if (!cm->above_seg_context) return 1;

   cm->above_txfm_context = (TXFM_CONTEXT **)aom_calloc(
       num_alloc_above_contexts, sizeof(cm->above_txfm_context));
   if (!cm->above_txfm_context) return 1;

   for (int tile_row = 0; tile_row < num_alloc_above_contexts; tile_row++) {
     for (plane_idx = 0; plane_idx < num_planes; plane_idx++) {
       cm->above_context[plane_idx][tile_row] = (ENTROPY_CONTEXT *)aom_calloc(
           aligned_mi_cols, sizeof(*cm->above_context[0][tile_row]));
       if (!cm->above_context[plane_idx][tile_row]) return 1;
     }

     cm->above_seg_context[tile_row] = (PARTITION_CONTEXT *)aom_calloc(
         aligned_mi_cols, sizeof(*cm->above_seg_context[tile_row]));
     if (!cm->above_seg_context[tile_row]) return 1;

     cm->above_txfm_context[tile_row] = (TXFM_CONTEXT *)aom_calloc(
         aligned_mi_cols, sizeof(*cm->above_txfm_context[tile_row]));
     if (!cm->above_txfm_context[tile_row]) return 1;
   }

   return 0;
 }

 int av1_alloc_context_buffers(AV1_COMMON *cm, int width, int height) {
   int new_mi_size;

   av1_set_mb_mi(cm, width, height);
   new_mi_size = cm->mi_stride * calc_mi_size(cm->mi_rows);
   if (cm->mi_alloc_size < new_mi_size) {
     cm->free_mi(cm);
     if (cm->alloc_mi(cm, new_mi_size)) goto fail;
   }

   return 0;

 fail:
   // clear the mi_* values to force a realloc on resync
   av1_set_mb_mi(cm, 0, 0);
   av1_free_context_buffers(cm);
   return 1;
 }

 void av1_remove_common(AV1_COMMON *cm) {
   av1_free_context_buffers(cm);

   aom_free(cm->fc);
   cm->fc = NULL;
   aom_free(cm->frame_contexts);
   cm->frame_contexts = NULL;
 }

 void av1_init_context_buffers(AV1_COMMON *cm) { cm->setup_mi(cm); }
	/*
	*
	* Copyright (c) 2016, Alliance for Open Media. All rights reserved
	*
	* This source code is subject to the terms of the BSD 2 Clause License and
	* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
	* was not distributed with this source code in the LICENSE file, you can
	* obtain it at www.aomedia.org/license/software. If the Alliance for Open
	* Media Patent License 1.0 was not distributed with this source code in the
	* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
	*/

	#include "config/aom_config.h"

	#include "aom_mem/aom_mem.h"

	#include "av1/common/alloccommon.h"
	#include "av1/common/blockd.h"
	#include "av1/common/entropymode.h"
	#include "av1/common/entropymv.h"
	#include "av1/common/onyxc_int.h"

	int av1_get_MBs(int width, int height) {
	const int aligned_width = ALIGN_POWER_OF_TWO(width, 3);
	const int aligned_height = ALIGN_POWER_OF_TWO(height, 3);
	const int mi_cols = aligned_width >> MI_SIZE_LOG2;
	const int mi_rows = aligned_height >> MI_SIZE_LOG2;

	const int mb_cols = (mi_cols + 2) >> 2;
	const int mb_rows = (mi_rows + 2) >> 2;
	return mb_rows * mb_cols;
	}

	#if LOOP_FILTER_BITMASK
	static int alloc_loop_filter_mask(AV1_COMMON *cm) {
	aom_free(cm->lf.lfm);
	cm->lf.lfm = NULL;

	// Each lfm holds bit masks for all the 4x4 blocks in a max
	// 64x64 (128x128 for ext_partitions) region. The stride
	// and rows are rounded up / truncated to a multiple of 16
	// (32 for ext_partition).
	cm->lf.lfm_stride = (cm->mi_cols + (MI_SIZE_64X64 - 1)) >> MIN_MIB_SIZE_LOG2;
	cm->lf.lfm_num = ((cm->mi_rows + (MI_SIZE_64X64 - 1)) >> MIN_MIB_SIZE_LOG2) *
	cm->lf.lfm_stride;
	cm->lf.lfm =
	(LoopFilterMask )aom_calloc(cm->lf.lfm_num, sizeof(cm->lf.lfm));
	if (!cm->lf.lfm) return 1;

	unsigned int i;
	for (i = 0; i < cm->lf.lfm_num; ++i) av1_zero(cm->lf.lfm[i]);

	return 0;
	}

	static void free_loop_filter_mask(AV1_COMMON *cm) {
	if (cm->lf.lfm == NULL) return;

	aom_free(cm->lf.lfm);
	cm->lf.lfm = NULL;
	cm->lf.lfm_num = 0;
	cm->lf.lfm_stride = 0;
	}
	#endif

	void av1_set_mb_mi(AV1_COMMON *cm, int width, int height) {
	// Ensure that the decoded width and height are both multiples of
	// 8 luma pixels (note: this may only be a multiple of 4 chroma pixels if
	// subsampling is used).
	// This simplifies the implementation of various experiments,
	// eg. cdef, which operates on units of 8x8 luma pixels.
	const int aligned_width = ALIGN_POWER_OF_TWO(width, 3);
	const int aligned_height = ALIGN_POWER_OF_TWO(height, 3);

	cm->mi_cols = aligned_width >> MI_SIZE_LOG2;
	cm->mi_rows = aligned_height >> MI_SIZE_LOG2;
	cm->mi_stride = calc_mi_size(cm->mi_cols);

	cm->mb_cols = (cm->mi_cols + 2) >> 2;
	cm->mb_rows = (cm->mi_rows + 2) >> 2;
	cm->MBs = cm->mb_rows * cm->mb_cols;

	#if LOOP_FILTER_BITMASK
	alloc_loop_filter_mask(cm);
	#endif
	}

	void av1_free_ref_frame_buffers(BufferPool *pool) {
	int i;

	for (i = 0; i < FRAME_BUFFERS; ++i) {
	if (pool->frame_bufs[i].ref_count > 0 &&
	pool->frame_bufs[i].raw_frame_buffer.data != NULL) {
	pool->release_fb_cb(pool->cb_priv, &pool->frame_bufs[i].raw_frame_buffer);
	pool->frame_bufs[i].raw_frame_buffer.data = NULL;
	pool->frame_bufs[i].raw_frame_buffer.size = 0;
	pool->frame_bufs[i].raw_frame_buffer.priv = NULL;
	pool->frame_bufs[i].ref_count = 0;
	}
	aom_free(pool->frame_bufs[i].mvs);
	pool->frame_bufs[i].mvs = NULL;
	aom_free(pool->frame_bufs[i].seg_map);
	pool->frame_bufs[i].seg_map = NULL;
	aom_free_frame_buffer(&pool->frame_bufs[i].buf);
	}
	}

	// Assumes cm->rst_info[p].restoration_unit_size is already initialized
	void av1_alloc_restoration_buffers(AV1_COMMON *cm) {
	const int num_planes = av1_num_planes(cm);
	for (int p = 0; p < num_planes; ++p)
	av1_alloc_restoration_struct(cm, &cm->rst_info[p], p > 0);

	if (cm->rst_tmpbuf == NULL) {
	CHECK_MEM_ERROR(cm, cm->rst_tmpbuf,
	(int32_t *)aom_memalign(16, RESTORATION_TMPBUF_SIZE));
	}

	if (cm->rlbs == NULL) {
	CHECK_MEM_ERROR(cm, cm->rlbs, aom_malloc(sizeof(RestorationLineBuffers)));
	}

	// For striped loop restoration, we divide each row of tiles into "stripes",
	// of height 64 luma pixels but with an offset by RESTORATION_UNIT_OFFSET
	// luma pixels to match the output from CDEF. We will need to store 2 *
	// RESTORATION_CTX_VERT lines of data for each stripe, and also need to be
	// able to quickly answer the question "Where is the <n>'th stripe for tile
	// row <m>?" To make that efficient, we generate the rst_last_stripe array.
	int num_stripes = 0;
	for (int i = 0; i < cm->tile_rows; ++i) {
	TileInfo tile_info;
	av1_tile_set_row(&tile_info, cm, i);
	const int mi_h = tile_info.mi_row_end - tile_info.mi_row_start;
	const int ext_h = RESTORATION_UNIT_OFFSET + (mi_h << MI_SIZE_LOG2);
	const int tile_stripes = (ext_h + 63) / 64;
	num_stripes += tile_stripes;
	}

	// 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->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->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
	<< use_highbd;
	RestorationStripeBoundaries *boundaries = &cm->rst_info[p].boundaries;

	if (buf_size != boundaries->stripe_boundary_size \|\|
	boundaries->stripe_boundary_above == NULL \|\|
	boundaries->stripe_boundary_below == NULL) {
	aom_free(boundaries->stripe_boundary_above);
	aom_free(boundaries->stripe_boundary_below);

	CHECK_MEM_ERROR(cm, boundaries->stripe_boundary_above,
	(uint8_t *)aom_memalign(32, buf_size));
	CHECK_MEM_ERROR(cm, boundaries->stripe_boundary_below,
	(uint8_t *)aom_memalign(32, buf_size));

	boundaries->stripe_boundary_size = buf_size;
	}
	boundaries->stripe_boundary_stride = stride;
	}
	}

	void av1_free_restoration_buffers(AV1_COMMON *cm) {
	int p;
	for (p = 0; p < MAX_MB_PLANE; ++p)
	av1_free_restoration_struct(&cm->rst_info[p]);
	aom_free(cm->rst_tmpbuf);
	cm->rst_tmpbuf = NULL;
	aom_free(cm->rlbs);
	cm->rlbs = NULL;
	for (p = 0; p < MAX_MB_PLANE; ++p) {
	RestorationStripeBoundaries *boundaries = &cm->rst_info[p].boundaries;
	aom_free(boundaries->stripe_boundary_above);
	aom_free(boundaries->stripe_boundary_below);
	boundaries->stripe_boundary_above = NULL;
	boundaries->stripe_boundary_below = NULL;
	}

	aom_free_frame_buffer(&cm->rst_frame);
	}

	void av1_free_above_context_buffers(AV1_COMMON *cm,
	int num_free_above_contexts) {
	int i;
	const int num_planes = cm->num_allocated_above_context_planes;

	for (int tile_row = 0; tile_row < num_free_above_contexts; tile_row++) {
	for (i = 0; i < num_planes; i++) {
	aom_free(cm->above_context[i][tile_row]);
	cm->above_context[i][tile_row] = NULL;
	}
	aom_free(cm->above_seg_context[tile_row]);
	cm->above_seg_context[tile_row] = NULL;

	aom_free(cm->above_txfm_context[tile_row]);
	cm->above_txfm_context[tile_row] = NULL;
	}
	for (i = 0; i < num_planes; i++) {
	aom_free(cm->above_context[i]);
	cm->above_context[i] = NULL;
	}
	aom_free(cm->above_seg_context);
	cm->above_seg_context = NULL;

	aom_free(cm->above_txfm_context);
	cm->above_txfm_context = NULL;

	cm->num_allocated_above_contexts = 0;
	cm->num_allocated_above_context_mi_col = 0;
	cm->num_allocated_above_context_planes = 0;
	}

	void av1_free_context_buffers(AV1_COMMON *cm) {
	cm->free_mi(cm);

	av1_free_above_context_buffers(cm, cm->num_allocated_above_contexts);

	#if LOOP_FILTER_BITMASK
	free_loop_filter_mask(cm);
	#endif
	}

	int av1_alloc_above_context_buffers(AV1_COMMON *cm,
	int num_alloc_above_contexts) {
	const int num_planes = av1_num_planes(cm);
	int plane_idx;
	const int aligned_mi_cols =
	ALIGN_POWER_OF_TWO(cm->mi_cols, MAX_MIB_SIZE_LOG2);

	// Allocate above context buffers
	cm->num_allocated_above_contexts = num_alloc_above_contexts;
	cm->num_allocated_above_context_mi_col = aligned_mi_cols;
	cm->num_allocated_above_context_planes = num_planes;
	for (plane_idx = 0; plane_idx < num_planes; plane_idx++) {
	cm->above_context[plane_idx] = (ENTROPY_CONTEXT **)aom_calloc(
	num_alloc_above_contexts, sizeof(cm->above_context[0]));
	if (!cm->above_context[plane_idx]) return 1;
	}

	cm->above_seg_context = (PARTITION_CONTEXT **)aom_calloc(
	num_alloc_above_contexts, sizeof(cm->above_seg_context));
	if (!cm->above_seg_context) return 1;

	cm->above_txfm_context = (TXFM_CONTEXT **)aom_calloc(
	num_alloc_above_contexts, sizeof(cm->above_txfm_context));
	if (!cm->above_txfm_context) return 1;

	for (int tile_row = 0; tile_row < num_alloc_above_contexts; tile_row++) {
	for (plane_idx = 0; plane_idx < num_planes; plane_idx++) {
	cm->above_context[plane_idx][tile_row] = (ENTROPY_CONTEXT *)aom_calloc(
	aligned_mi_cols, sizeof(*cm->above_context[0][tile_row]));
	if (!cm->above_context[plane_idx][tile_row]) return 1;
	}

	cm->above_seg_context[tile_row] = (PARTITION_CONTEXT *)aom_calloc(
	aligned_mi_cols, sizeof(*cm->above_seg_context[tile_row]));
	if (!cm->above_seg_context[tile_row]) return 1;

	cm->above_txfm_context[tile_row] = (TXFM_CONTEXT *)aom_calloc(
	aligned_mi_cols, sizeof(*cm->above_txfm_context[tile_row]));
	if (!cm->above_txfm_context[tile_row]) return 1;
	}

	return 0;
	}

	int av1_alloc_context_buffers(AV1_COMMON *cm, int width, int height) {
	int new_mi_size;

	av1_set_mb_mi(cm, width, height);
	new_mi_size = cm->mi_stride * calc_mi_size(cm->mi_rows);
	if (cm->mi_alloc_size < new_mi_size) {
	cm->free_mi(cm);
	if (cm->alloc_mi(cm, new_mi_size)) goto fail;
	}

	return 0;

	fail:
	// clear the mi_* values to force a realloc on resync
	av1_set_mb_mi(cm, 0, 0);
	av1_free_context_buffers(cm);
	return 1;
	}

	void av1_remove_common(AV1_COMMON *cm) {
	av1_free_context_buffers(cm);

	aom_free(cm->fc);
	cm->fc = NULL;
	aom_free(cm->frame_contexts);
	cm->frame_contexts = NULL;
	}

	void av1_init_context_buffers(AV1_COMMON *cm) { cm->setup_mi(cm); }