| /* |
| * Copyright (c) 2010 The WebM project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #include <assert.h> |
| |
| #include "./vp9_rtcd.h" |
| #include "vpx_mem/vpx_mem.h" |
| #include "vpx_scale/vpx_scale.h" |
| |
| #include "vp9/common/vp9_extend.h" |
| #include "vp9/common/vp9_modecont.h" |
| #include "vp9/common/vp9_common.h" |
| #include "vp9/common/vp9_reconintra.h" |
| #include "vp9/common/vp9_reconinter.h" |
| #include "vp9/common/vp9_entropy.h" |
| #include "vp9/common/vp9_invtrans.h" |
| #include "vp9/common/vp9_alloccommon.h" |
| #include "vp9/common/vp9_entropymode.h" |
| #include "vp9/common/vp9_quant_common.h" |
| #include "vp9/common/vp9_seg_common.h" |
| #include "vp9/common/vp9_tile_common.h" |
| |
| #include "vp9/decoder/vp9_dboolhuff.h" |
| #include "vp9/decoder/vp9_decodframe.h" |
| #include "vp9/decoder/vp9_detokenize.h" |
| #include "vp9/decoder/vp9_decodemv.h" |
| #include "vp9/decoder/vp9_onyxd_int.h" |
| #include "vp9/decoder/vp9_read_bit_buffer.h" |
| |
| |
| // #define DEC_DEBUG |
| #ifdef DEC_DEBUG |
| int dec_debug = 0; |
| #endif |
| |
| static int read_le32(const uint8_t *p) { |
| return (p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]; |
| } |
| |
| // len == 0 is not allowed |
| static int read_is_valid(const uint8_t *start, size_t len, |
| const uint8_t *end) { |
| return start + len > start && start + len <= end; |
| } |
| |
| static void setup_txfm_mode(VP9_COMMON *pc, int lossless, vp9_reader *r) { |
| if (lossless) { |
| pc->txfm_mode = ONLY_4X4; |
| } else { |
| pc->txfm_mode = vp9_read_literal(r, 2); |
| if (pc->txfm_mode == ALLOW_32X32) |
| pc->txfm_mode += vp9_read_bit(r); |
| if (pc->txfm_mode == TX_MODE_SELECT) { |
| int i, j; |
| for (i = 0; i < TX_SIZE_CONTEXTS; ++i) { |
| for (j = 0; j < TX_SIZE_MAX_SB - 3; ++j) { |
| if (vp9_read(r, VP9_DEF_UPDATE_PROB)) |
| pc->fc.tx_probs_8x8p[i][j] = |
| vp9_read_prob_diff_update(r, pc->fc.tx_probs_8x8p[i][j]); |
| } |
| } |
| for (i = 0; i < TX_SIZE_CONTEXTS; ++i) { |
| for (j = 0; j < TX_SIZE_MAX_SB - 2; ++j) { |
| if (vp9_read(r, VP9_DEF_UPDATE_PROB)) |
| pc->fc.tx_probs_16x16p[i][j] = |
| vp9_read_prob_diff_update(r, pc->fc.tx_probs_16x16p[i][j]); |
| } |
| } |
| for (i = 0; i < TX_SIZE_CONTEXTS; ++i) { |
| for (j = 0; j < TX_SIZE_MAX_SB - 1; ++j) { |
| if (vp9_read(r, VP9_DEF_UPDATE_PROB)) |
| pc->fc.tx_probs_32x32p[i][j] = |
| vp9_read_prob_diff_update(r, pc->fc.tx_probs_32x32p[i][j]); |
| } |
| } |
| } else { |
| vpx_memcpy(pc->fc.tx_probs_8x8p, vp9_default_tx_probs_8x8p, |
| sizeof(vp9_default_tx_probs_8x8p)); |
| vpx_memcpy(pc->fc.tx_probs_16x16p, vp9_default_tx_probs_16x16p, |
| sizeof(vp9_default_tx_probs_16x16p)); |
| vpx_memcpy(pc->fc.tx_probs_32x32p, vp9_default_tx_probs_32x32p, |
| sizeof(vp9_default_tx_probs_32x32p)); |
| } |
| } |
| } |
| |
| static int get_unsigned_bits(unsigned int num_values) { |
| int cat = 0; |
| if (num_values <= 1) |
| return 0; |
| num_values--; |
| while (num_values > 0) { |
| cat++; |
| num_values >>= 1; |
| } |
| return cat; |
| } |
| |
| static int inv_recenter_nonneg(int v, int m) { |
| if (v > 2 * m) |
| return v; |
| |
| return v % 2 ? m - (v + 1) / 2 : m + v / 2; |
| } |
| |
| static int decode_uniform(vp9_reader *r, int n) { |
| int v; |
| const int l = get_unsigned_bits(n); |
| const int m = (1 << l) - n; |
| if (!l) |
| return 0; |
| |
| v = vp9_read_literal(r, l - 1); |
| return v < m ? v : (v << 1) - m + vp9_read_bit(r); |
| } |
| |
| static int decode_term_subexp(vp9_reader *r, int k, int num_syms) { |
| int i = 0, mk = 0, word; |
| while (1) { |
| const int b = i ? k + i - 1 : k; |
| const int a = 1 << b; |
| if (num_syms <= mk + 3 * a) { |
| word = decode_uniform(r, num_syms - mk) + mk; |
| break; |
| } else { |
| if (vp9_read_bit(r)) { |
| i++; |
| mk += a; |
| } else { |
| word = vp9_read_literal(r, b) + mk; |
| break; |
| } |
| } |
| } |
| return word; |
| } |
| |
| static int decode_unsigned_max(struct vp9_read_bit_buffer *rb, int max) { |
| const int data = vp9_rb_read_literal(rb, get_unsigned_bits(max)); |
| return data > max ? max : data; |
| } |
| |
| static int merge_index(int v, int n, int modulus) { |
| int max1 = (n - 1 - modulus / 2) / modulus + 1; |
| if (v < max1) { |
| v = v * modulus + modulus / 2; |
| } else { |
| int w; |
| v -= max1; |
| w = v; |
| v += (v + modulus - modulus / 2) / modulus; |
| while (v % modulus == modulus / 2 || |
| w != v - (v + modulus - modulus / 2) / modulus) v++; |
| } |
| return v; |
| } |
| |
| static int inv_remap_prob(int v, int m) { |
| const int n = 256; |
| |
| v = merge_index(v, n - 1, MODULUS_PARAM); |
| if ((m << 1) <= n) { |
| return inv_recenter_nonneg(v + 1, m); |
| } else { |
| return n - 1 - inv_recenter_nonneg(v + 1, n - 1 - m); |
| } |
| } |
| |
| vp9_prob vp9_read_prob_diff_update(vp9_reader *r, int oldp) { |
| int delp = decode_term_subexp(r, SUBEXP_PARAM, 255); |
| return (vp9_prob)inv_remap_prob(delp, oldp); |
| } |
| |
| void vp9_init_dequantizer(VP9_COMMON *pc) { |
| int q; |
| |
| for (q = 0; q < QINDEX_RANGE; q++) { |
| // DC value |
| pc->y_dequant[q][0] = vp9_dc_quant(q, pc->y_dc_delta_q); |
| pc->uv_dequant[q][0] = vp9_dc_quant(q, pc->uv_dc_delta_q); |
| |
| // AC values |
| pc->y_dequant[q][1] = vp9_ac_quant(q, 0); |
| pc->uv_dequant[q][1] = vp9_ac_quant(q, pc->uv_ac_delta_q); |
| } |
| } |
| |
| static void mb_init_dequantizer(VP9_COMMON *pc, MACROBLOCKD *xd) { |
| int i; |
| const int segment_id = xd->mode_info_context->mbmi.segment_id; |
| xd->q_index = vp9_get_qindex(xd, segment_id, pc->base_qindex); |
| |
| xd->plane[0].dequant = pc->y_dequant[xd->q_index]; |
| for (i = 1; i < MAX_MB_PLANE; i++) |
| xd->plane[i].dequant = pc->uv_dequant[xd->q_index]; |
| } |
| |
| static void decode_block(int plane, int block, BLOCK_SIZE_TYPE bsize, |
| int ss_txfrm_size, void *arg) { |
| MACROBLOCKD* const xd = arg; |
| int16_t* const qcoeff = BLOCK_OFFSET(xd->plane[plane].qcoeff, block, 16); |
| const int stride = xd->plane[plane].dst.stride; |
| const int raster_block = txfrm_block_to_raster_block(xd, bsize, plane, |
| block, ss_txfrm_size); |
| uint8_t* const dst = raster_block_offset_uint8(xd, bsize, plane, |
| raster_block, |
| xd->plane[plane].dst.buf, |
| stride); |
| |
| TX_TYPE tx_type; |
| |
| switch (ss_txfrm_size / 2) { |
| case TX_4X4: |
| tx_type = plane == 0 ? get_tx_type_4x4(xd, raster_block) : DCT_DCT; |
| if (tx_type == DCT_DCT) |
| xd->itxm_add(qcoeff, dst, stride, xd->plane[plane].eobs[block]); |
| else |
| vp9_iht_add_c(tx_type, qcoeff, dst, stride, |
| xd->plane[plane].eobs[block]); |
| break; |
| case TX_8X8: |
| tx_type = plane == 0 ? get_tx_type_8x8(xd, raster_block) : DCT_DCT; |
| vp9_iht_add_8x8_c(tx_type, qcoeff, dst, stride, |
| xd->plane[plane].eobs[block]); |
| break; |
| case TX_16X16: |
| tx_type = plane == 0 ? get_tx_type_16x16(xd, raster_block) : DCT_DCT; |
| vp9_iht_add_16x16_c(tx_type, qcoeff, dst, stride, |
| xd->plane[plane].eobs[block]); |
| break; |
| case TX_32X32: |
| vp9_idct_add_32x32(qcoeff, dst, stride, xd->plane[plane].eobs[block]); |
| break; |
| } |
| } |
| |
| static void decode_block_intra(int plane, int block, BLOCK_SIZE_TYPE bsize, |
| int ss_txfrm_size, void *arg) { |
| MACROBLOCKD* const xd = arg; |
| int16_t* const qcoeff = BLOCK_OFFSET(xd->plane[plane].qcoeff, block, 16); |
| const int stride = xd->plane[plane].dst.stride; |
| const int raster_block = txfrm_block_to_raster_block(xd, bsize, plane, |
| block, ss_txfrm_size); |
| uint8_t* const dst = raster_block_offset_uint8(xd, bsize, plane, |
| raster_block, |
| xd->plane[plane].dst.buf, |
| stride); |
| const TX_SIZE tx_size = (TX_SIZE)(ss_txfrm_size / 2); |
| TX_TYPE tx_type; |
| int mode, b_mode; |
| int plane_b_size; |
| int tx_ib = raster_block >> tx_size; |
| mode = plane == 0? xd->mode_info_context->mbmi.mode: |
| xd->mode_info_context->mbmi.uv_mode; |
| |
| |
| if (xd->mode_info_context->mbmi.sb_type < BLOCK_SIZE_SB8X8 && plane == 0) { |
| assert(bsize == BLOCK_SIZE_SB8X8); |
| b_mode = xd->mode_info_context->bmi[raster_block].as_mode.first; |
| } else { |
| b_mode = mode; |
| } |
| |
| if (xd->mb_to_right_edge < 0 || xd->mb_to_bottom_edge < 0) { |
| extend_for_intra(xd, plane, block, bsize, ss_txfrm_size); |
| } |
| |
| plane_b_size = b_width_log2(bsize) - xd->plane[plane].subsampling_x; |
| vp9_predict_intra_block(xd, tx_ib, plane_b_size, tx_size, |
| b_mode, dst, xd->plane[plane].dst.stride); |
| |
| switch (ss_txfrm_size / 2) { |
| case TX_4X4: |
| tx_type = plane == 0 ? get_tx_type_4x4(xd, raster_block) : DCT_DCT; |
| if (tx_type == DCT_DCT) |
| xd->itxm_add(qcoeff, dst, stride, xd->plane[plane].eobs[block]); |
| else |
| vp9_iht_add_c(tx_type, qcoeff, dst, stride, |
| xd->plane[plane].eobs[block]); |
| break; |
| case TX_8X8: |
| tx_type = plane == 0 ? get_tx_type_8x8(xd, raster_block) : DCT_DCT; |
| vp9_iht_add_8x8_c(tx_type, qcoeff, dst, stride, |
| xd->plane[plane].eobs[block]); |
| break; |
| case TX_16X16: |
| tx_type = plane == 0 ? get_tx_type_16x16(xd, raster_block) : DCT_DCT; |
| vp9_iht_add_16x16_c(tx_type, qcoeff, dst, stride, |
| xd->plane[plane].eobs[block]); |
| break; |
| case TX_32X32: |
| vp9_idct_add_32x32(qcoeff, dst, stride, xd->plane[plane].eobs[block]); |
| break; |
| } |
| } |
| |
| static void decode_atom(VP9D_COMP *pbi, MACROBLOCKD *xd, |
| int mi_row, int mi_col, |
| vp9_reader *r, BLOCK_SIZE_TYPE bsize) { |
| MB_MODE_INFO *const mbmi = &xd->mode_info_context->mbmi; |
| |
| assert(mbmi->ref_frame[0] != INTRA_FRAME); |
| |
| if (pbi->common.frame_type != KEY_FRAME) |
| vp9_setup_interp_filters(xd, mbmi->interp_filter, &pbi->common); |
| |
| // prediction |
| vp9_build_inter_predictors_sb(xd, mi_row, mi_col, bsize); |
| |
| if (mbmi->mb_skip_coeff) { |
| vp9_reset_sb_tokens_context(xd, bsize); |
| } else { |
| // re-initialize macroblock dequantizer before detokenization |
| if (xd->segmentation_enabled) |
| mb_init_dequantizer(&pbi->common, xd); |
| |
| if (!vp9_reader_has_error(r)) { |
| vp9_decode_tokens(pbi, xd, r, bsize); |
| } |
| } |
| foreach_transformed_block(xd, bsize, decode_block, xd); |
| } |
| |
| static void decode_sb_intra(VP9D_COMP *pbi, MACROBLOCKD *xd, |
| int mi_row, int mi_col, |
| vp9_reader *r, BLOCK_SIZE_TYPE bsize) { |
| MB_MODE_INFO *const mbmi = &xd->mode_info_context->mbmi; |
| if (mbmi->mb_skip_coeff) { |
| vp9_reset_sb_tokens_context(xd, bsize); |
| } else { |
| // re-initialize macroblock dequantizer before detokenization |
| if (xd->segmentation_enabled) |
| mb_init_dequantizer(&pbi->common, xd); |
| |
| if (!vp9_reader_has_error(r)) { |
| vp9_decode_tokens(pbi, xd, r, bsize); |
| } |
| } |
| |
| foreach_transformed_block(xd, bsize, decode_block_intra, xd); |
| } |
| |
| |
| static void decode_sb(VP9D_COMP *pbi, MACROBLOCKD *xd, int mi_row, int mi_col, |
| vp9_reader *r, BLOCK_SIZE_TYPE bsize) { |
| const int bwl = mi_width_log2(bsize), bhl = mi_height_log2(bsize); |
| const int bw = 1 << bwl, bh = 1 << bhl; |
| int n, eobtotal; |
| VP9_COMMON *const pc = &pbi->common; |
| MODE_INFO *const mi = xd->mode_info_context; |
| MB_MODE_INFO *const mbmi = &mi->mbmi; |
| const int mis = pc->mode_info_stride; |
| |
| assert(mbmi->sb_type == bsize); |
| assert(mbmi->ref_frame[0] != INTRA_FRAME); |
| |
| if (pbi->common.frame_type != KEY_FRAME) |
| vp9_setup_interp_filters(xd, mbmi->interp_filter, pc); |
| |
| // generate prediction |
| vp9_build_inter_predictors_sb(xd, mi_row, mi_col, bsize); |
| |
| if (mbmi->mb_skip_coeff) { |
| vp9_reset_sb_tokens_context(xd, bsize); |
| } else { |
| // re-initialize macroblock dequantizer before detokenization |
| if (xd->segmentation_enabled) |
| mb_init_dequantizer(pc, xd); |
| |
| // dequantization and idct |
| eobtotal = vp9_decode_tokens(pbi, xd, r, bsize); |
| if (eobtotal == 0) { // skip loopfilter |
| for (n = 0; n < bw * bh; n++) { |
| const int x_idx = n & (bw - 1), y_idx = n >> bwl; |
| |
| if (mi_col + x_idx < pc->mi_cols && mi_row + y_idx < pc->mi_rows) |
| mi[y_idx * mis + x_idx].mbmi.mb_skip_coeff = 1; |
| } |
| } else { |
| foreach_transformed_block(xd, bsize, decode_block, xd); |
| } |
| } |
| } |
| |
| static void set_offsets(VP9D_COMP *pbi, BLOCK_SIZE_TYPE bsize, |
| int mi_row, int mi_col) { |
| const int bh = 1 << mi_height_log2(bsize); |
| const int bw = 1 << mi_width_log2(bsize); |
| VP9_COMMON *const cm = &pbi->common; |
| MACROBLOCKD *const xd = &pbi->mb; |
| const int mi_idx = mi_row * cm->mode_info_stride + mi_col; |
| int i; |
| |
| xd->mode_info_context = cm->mi + mi_idx; |
| xd->mode_info_context->mbmi.sb_type = bsize; |
| // Special case: if prev_mi is NULL, the previous mode info context |
| // cannot be used. |
| xd->prev_mode_info_context = cm->prev_mi ? |
| cm->prev_mi + mi_idx : NULL; |
| |
| for (i = 0; i < MAX_MB_PLANE; i++) { |
| xd->plane[i].above_context = cm->above_context[i] + |
| (mi_col * 2 >> xd->plane[i].subsampling_x); |
| xd->plane[i].left_context = cm->left_context[i] + |
| (((mi_row * 2) & 15) >> xd->plane[i].subsampling_y); |
| } |
| xd->above_seg_context = cm->above_seg_context + mi_col; |
| xd->left_seg_context = cm->left_seg_context + (mi_row & MI_MASK); |
| |
| // Distance of Mb to the various image edges. These are specified to 8th pel |
| // as they are always compared to values that are in 1/8th pel units |
| set_mi_row_col(cm, xd, mi_row, bh, mi_col, bw); |
| |
| setup_dst_planes(xd, &cm->yv12_fb[cm->new_fb_idx], mi_row, mi_col); |
| } |
| |
| static void set_refs(VP9D_COMP *pbi, int mi_row, int mi_col) { |
| VP9_COMMON *const cm = &pbi->common; |
| MACROBLOCKD *const xd = &pbi->mb; |
| MB_MODE_INFO *const mbmi = &xd->mode_info_context->mbmi; |
| |
| if (mbmi->ref_frame[0] > INTRA_FRAME) { |
| // Select the appropriate reference frame for this MB |
| const int fb_idx = cm->active_ref_idx[mbmi->ref_frame[0] - 1]; |
| const YV12_BUFFER_CONFIG *cfg = &cm->yv12_fb[fb_idx]; |
| xd->scale_factor[0] = cm->active_ref_scale[mbmi->ref_frame[0] - 1]; |
| xd->scale_factor_uv[0] = cm->active_ref_scale[mbmi->ref_frame[0] - 1]; |
| setup_pre_planes(xd, cfg, NULL, mi_row, mi_col, |
| xd->scale_factor, xd->scale_factor_uv); |
| xd->corrupted |= cfg->corrupted; |
| |
| if (mbmi->ref_frame[1] > INTRA_FRAME) { |
| // Select the appropriate reference frame for this MB |
| const int second_fb_idx = cm->active_ref_idx[mbmi->ref_frame[1] - 1]; |
| const YV12_BUFFER_CONFIG *second_cfg = &cm->yv12_fb[second_fb_idx]; |
| xd->scale_factor[1] = cm->active_ref_scale[mbmi->ref_frame[1] - 1]; |
| xd->scale_factor_uv[1] = cm->active_ref_scale[mbmi->ref_frame[1] - 1]; |
| setup_pre_planes(xd, NULL, second_cfg, mi_row, mi_col, |
| xd->scale_factor, xd->scale_factor_uv); |
| xd->corrupted |= second_cfg->corrupted; |
| } |
| } |
| } |
| |
| static void decode_modes_b(VP9D_COMP *pbi, int mi_row, int mi_col, |
| vp9_reader *r, BLOCK_SIZE_TYPE bsize) { |
| MACROBLOCKD *const xd = &pbi->mb; |
| |
| if (bsize < BLOCK_SIZE_SB8X8) |
| if (xd->ab_index > 0) |
| return; |
| set_offsets(pbi, bsize, mi_row, mi_col); |
| vp9_decode_mb_mode_mv(pbi, xd, mi_row, mi_col, r); |
| set_refs(pbi, mi_row, mi_col); |
| |
| if (xd->mode_info_context->mbmi.ref_frame[0] == INTRA_FRAME) |
| decode_sb_intra(pbi, xd, mi_row, mi_col, r, (bsize < BLOCK_SIZE_SB8X8) ? |
| BLOCK_SIZE_SB8X8 : bsize); |
| else if (bsize < BLOCK_SIZE_SB8X8) |
| decode_atom(pbi, xd, mi_row, mi_col, r, BLOCK_SIZE_SB8X8); |
| else |
| decode_sb(pbi, xd, mi_row, mi_col, r, bsize); |
| |
| xd->corrupted |= vp9_reader_has_error(r); |
| } |
| |
| static void decode_modes_sb(VP9D_COMP *pbi, int mi_row, int mi_col, |
| vp9_reader* r, BLOCK_SIZE_TYPE bsize) { |
| VP9_COMMON *const pc = &pbi->common; |
| MACROBLOCKD *const xd = &pbi->mb; |
| int bsl = mi_width_log2(bsize), bs = (1 << bsl) / 2; |
| int n; |
| PARTITION_TYPE partition = PARTITION_NONE; |
| BLOCK_SIZE_TYPE subsize; |
| |
| if (mi_row >= pc->mi_rows || mi_col >= pc->mi_cols) |
| return; |
| |
| if (bsize < BLOCK_SIZE_SB8X8) |
| if (xd->ab_index != 0) |
| return; |
| |
| if (bsize >= BLOCK_SIZE_SB8X8) { |
| int pl; |
| int idx = check_bsize_coverage(pc, xd, mi_row, mi_col, bsize); |
| // read the partition information |
| xd->left_seg_context = pc->left_seg_context + (mi_row & MI_MASK); |
| xd->above_seg_context = pc->above_seg_context + mi_col; |
| pl = partition_plane_context(xd, bsize); |
| |
| if (idx == 0) |
| partition = treed_read(r, vp9_partition_tree, |
| pc->fc.partition_prob[pc->frame_type][pl]); |
| else if (idx > 0 && |
| !vp9_read(r, pc->fc.partition_prob[pc->frame_type][pl][idx])) |
| partition = (idx == 1) ? PARTITION_HORZ : PARTITION_VERT; |
| else |
| partition = PARTITION_SPLIT; |
| |
| pc->fc.partition_counts[pl][partition]++; |
| } |
| |
| subsize = get_subsize(bsize, partition); |
| *(get_sb_index(xd, subsize)) = 0; |
| |
| switch (partition) { |
| case PARTITION_NONE: |
| decode_modes_b(pbi, mi_row, mi_col, r, subsize); |
| break; |
| case PARTITION_HORZ: |
| decode_modes_b(pbi, mi_row, mi_col, r, subsize); |
| *(get_sb_index(xd, subsize)) = 1; |
| if (mi_row + bs < pc->mi_rows) |
| decode_modes_b(pbi, mi_row + bs, mi_col, r, subsize); |
| break; |
| case PARTITION_VERT: |
| decode_modes_b(pbi, mi_row, mi_col, r, subsize); |
| *(get_sb_index(xd, subsize)) = 1; |
| if (mi_col + bs < pc->mi_cols) |
| decode_modes_b(pbi, mi_row, mi_col + bs, r, subsize); |
| break; |
| case PARTITION_SPLIT: |
| for (n = 0; n < 4; n++) { |
| int j = n >> 1, i = n & 0x01; |
| *(get_sb_index(xd, subsize)) = n; |
| decode_modes_sb(pbi, mi_row + j * bs, mi_col + i * bs, r, subsize); |
| } |
| break; |
| default: |
| assert(0); |
| } |
| // update partition context |
| if (bsize >= BLOCK_SIZE_SB8X8 && |
| (bsize == BLOCK_SIZE_SB8X8 || partition != PARTITION_SPLIT)) { |
| set_partition_seg_context(pc, xd, mi_row, mi_col); |
| update_partition_context(xd, subsize, bsize); |
| } |
| } |
| |
| static void setup_token_decoder(VP9D_COMP *pbi, |
| const uint8_t *data, |
| vp9_reader *r) { |
| VP9_COMMON *pc = &pbi->common; |
| const uint8_t *data_end = pbi->source + pbi->source_sz; |
| const size_t partition_size = data_end - data; |
| |
| // Validate the calculated partition length. If the buffer |
| // described by the partition can't be fully read, then restrict |
| // it to the portion that can be (for EC mode) or throw an error. |
| if (!read_is_valid(data, partition_size, data_end)) |
| vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME, |
| "Truncated packet or corrupt partition " |
| "%d length", 1); |
| |
| if (vp9_reader_init(r, data, partition_size)) |
| vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR, |
| "Failed to allocate bool decoder %d", 1); |
| } |
| |
| static void read_coef_probs_common(FRAME_CONTEXT *fc, TX_SIZE tx_size, |
| vp9_reader *r) { |
| const int entropy_nodes_update = UNCONSTRAINED_NODES; |
| vp9_coeff_probs_model *coef_probs = fc->coef_probs[tx_size]; |
| |
| int i, j, k, l, m; |
| |
| if (vp9_read_bit(r)) { |
| for (i = 0; i < BLOCK_TYPES; i++) { |
| for (j = 0; j < REF_TYPES; j++) { |
| for (k = 0; k < COEF_BANDS; k++) { |
| for (l = 0; l < PREV_COEF_CONTEXTS; l++) { |
| const int mstart = 0; |
| if (l >= 3 && k == 0) |
| continue; |
| |
| for (m = mstart; m < entropy_nodes_update; m++) { |
| vp9_prob *const p = coef_probs[i][j][k][l] + m; |
| |
| if (vp9_read(r, vp9_coef_update_prob[m])) { |
| *p = vp9_read_prob_diff_update(r, *p); |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| static void read_coef_probs(VP9D_COMP *pbi, vp9_reader *r) { |
| const TXFM_MODE txfm_mode = pbi->common.txfm_mode; |
| FRAME_CONTEXT *const fc = &pbi->common.fc; |
| |
| read_coef_probs_common(fc, TX_4X4, r); |
| |
| if (txfm_mode > ONLY_4X4) |
| read_coef_probs_common(fc, TX_8X8, r); |
| |
| if (txfm_mode > ALLOW_8X8) |
| read_coef_probs_common(fc, TX_16X16, r); |
| |
| if (txfm_mode > ALLOW_16X16) |
| read_coef_probs_common(fc, TX_32X32, r); |
| } |
| |
| static void setup_segmentation(VP9D_COMP *pbi, struct vp9_read_bit_buffer *rb) { |
| int i, j; |
| |
| VP9_COMMON *const cm = &pbi->common; |
| MACROBLOCKD *const xd = &pbi->mb; |
| |
| xd->update_mb_segmentation_map = 0; |
| xd->update_mb_segmentation_data = 0; |
| |
| xd->segmentation_enabled = vp9_rb_read_bit(rb); |
| if (!xd->segmentation_enabled) |
| return; |
| |
| // Segmentation map update |
| xd->update_mb_segmentation_map = vp9_rb_read_bit(rb); |
| if (xd->update_mb_segmentation_map) { |
| for (i = 0; i < MB_SEG_TREE_PROBS; i++) |
| xd->mb_segment_tree_probs[i] = vp9_rb_read_bit(rb) ? |
| vp9_rb_read_literal(rb, 8) : MAX_PROB; |
| |
| cm->temporal_update = vp9_rb_read_bit(rb); |
| if (cm->temporal_update) { |
| for (i = 0; i < PREDICTION_PROBS; i++) |
| cm->segment_pred_probs[i] = vp9_rb_read_bit(rb) ? |
| vp9_rb_read_literal(rb, 8) : MAX_PROB; |
| } else { |
| for (i = 0; i < PREDICTION_PROBS; i++) |
| cm->segment_pred_probs[i] = MAX_PROB; |
| } |
| } |
| |
| // Segmentation data update |
| xd->update_mb_segmentation_data = vp9_rb_read_bit(rb); |
| if (xd->update_mb_segmentation_data) { |
| xd->mb_segment_abs_delta = vp9_rb_read_bit(rb); |
| |
| vp9_clearall_segfeatures(xd); |
| |
| for (i = 0; i < MAX_MB_SEGMENTS; i++) { |
| for (j = 0; j < SEG_LVL_MAX; j++) { |
| int data = 0; |
| const int feature_enabled = vp9_rb_read_bit(rb); |
| if (feature_enabled) { |
| vp9_enable_segfeature(xd, i, j); |
| data = decode_unsigned_max(rb, vp9_seg_feature_data_max(j)); |
| if (vp9_is_segfeature_signed(j)) |
| data = vp9_rb_read_bit(rb) ? -data : data; |
| } |
| vp9_set_segdata(xd, i, j, data); |
| } |
| } |
| } |
| } |
| |
| static void setup_loopfilter(VP9D_COMP *pbi, struct vp9_read_bit_buffer *rb) { |
| VP9_COMMON *const cm = &pbi->common; |
| MACROBLOCKD *const xd = &pbi->mb; |
| |
| cm->filter_level = vp9_rb_read_literal(rb, 6); |
| cm->sharpness_level = vp9_rb_read_literal(rb, 3); |
| |
| // Read in loop filter deltas applied at the MB level based on mode or ref |
| // frame. |
| xd->mode_ref_lf_delta_update = 0; |
| |
| xd->mode_ref_lf_delta_enabled = vp9_rb_read_bit(rb); |
| if (xd->mode_ref_lf_delta_enabled) { |
| xd->mode_ref_lf_delta_update = vp9_rb_read_bit(rb); |
| if (xd->mode_ref_lf_delta_update) { |
| int i; |
| |
| for (i = 0; i < MAX_REF_LF_DELTAS; i++) { |
| if (vp9_rb_read_bit(rb)) { |
| const int value = vp9_rb_read_literal(rb, 6); |
| xd->ref_lf_deltas[i] = vp9_rb_read_bit(rb) ? -value : value; |
| } |
| } |
| |
| for (i = 0; i < MAX_MODE_LF_DELTAS; i++) { |
| if (vp9_rb_read_bit(rb)) { |
| const int value = vp9_rb_read_literal(rb, 6); |
| xd->mode_lf_deltas[i] = vp9_rb_read_bit(rb) ? -value : value; |
| } |
| } |
| } |
| } |
| } |
| |
| static int read_delta_q(struct vp9_read_bit_buffer *rb, int *delta_q) { |
| const int old = *delta_q; |
| if (vp9_rb_read_bit(rb)) { |
| const int value = vp9_rb_read_literal(rb, 4); |
| *delta_q = vp9_rb_read_bit(rb) ? -value : value; |
| } |
| return old != *delta_q; |
| } |
| |
| static void setup_quantization(VP9D_COMP *pbi, struct vp9_read_bit_buffer *rb) { |
| MACROBLOCKD *const xd = &pbi->mb; |
| VP9_COMMON *const cm = &pbi->common; |
| int update = 0; |
| |
| cm->base_qindex = vp9_rb_read_literal(rb, QINDEX_BITS); |
| update |= read_delta_q(rb, &cm->y_dc_delta_q); |
| update |= read_delta_q(rb, &cm->uv_dc_delta_q); |
| update |= read_delta_q(rb, &cm->uv_ac_delta_q); |
| if (update) |
| vp9_init_dequantizer(cm); |
| |
| xd->lossless = cm->base_qindex == 0 && |
| cm->y_dc_delta_q == 0 && |
| cm->uv_dc_delta_q == 0 && |
| cm->uv_ac_delta_q == 0; |
| if (xd->lossless) { |
| xd->itxm_add = vp9_idct_add_lossless_c; |
| xd->itxm_add_y_block = vp9_idct_add_y_block_lossless_c; |
| xd->itxm_add_uv_block = vp9_idct_add_uv_block_lossless_c; |
| } else { |
| xd->itxm_add = vp9_idct_add; |
| xd->itxm_add_y_block = vp9_idct_add_y_block; |
| xd->itxm_add_uv_block = vp9_idct_add_uv_block; |
| } |
| } |
| |
| static INTERPOLATIONFILTERTYPE read_interp_filter_type( |
| struct vp9_read_bit_buffer *rb) { |
| return vp9_rb_read_bit(rb) ? SWITCHABLE |
| : vp9_rb_read_literal(rb, 2); |
| } |
| |
| static void read_frame_size(VP9_COMMON *cm, struct vp9_read_bit_buffer *rb, |
| int *width, int *height) { |
| const int w = vp9_rb_read_literal(rb, 16) + 1; |
| const int h = vp9_rb_read_literal(rb, 16) + 1; |
| *width = w; |
| *height = h; |
| } |
| |
| static void setup_display_size(VP9D_COMP *pbi, struct vp9_read_bit_buffer *rb) { |
| VP9_COMMON *const cm = &pbi->common; |
| cm->display_width = cm->width; |
| cm->display_height = cm->height; |
| if (vp9_rb_read_bit(rb)) |
| read_frame_size(cm, rb, &cm->display_width, &cm->display_height); |
| } |
| |
| static void apply_frame_size(VP9D_COMP *pbi, int width, int height) { |
| VP9_COMMON *cm = &pbi->common; |
| |
| if (cm->width != width || cm->height != height) { |
| if (!pbi->initial_width || !pbi->initial_height) { |
| if (vp9_alloc_frame_buffers(cm, width, height)) |
| vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR, |
| "Failed to allocate frame buffers"); |
| pbi->initial_width = width; |
| pbi->initial_height = height; |
| } else { |
| if (width > pbi->initial_width) |
| vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, |
| "Frame width too large"); |
| |
| if (height > pbi->initial_height) |
| vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, |
| "Frame height too large"); |
| } |
| |
| cm->width = width; |
| cm->height = height; |
| |
| vp9_update_frame_size(cm); |
| } |
| |
| vp9_realloc_frame_buffer(&cm->yv12_fb[cm->new_fb_idx], cm->width, cm->height, |
| cm->subsampling_x, cm->subsampling_y, |
| VP9BORDERINPIXELS); |
| } |
| |
| static void setup_frame_size(VP9D_COMP *pbi, |
| struct vp9_read_bit_buffer *rb) { |
| VP9_COMMON *const cm = &pbi->common; |
| int width, height; |
| read_frame_size(cm, rb, &width, &height); |
| setup_display_size(pbi, rb); |
| apply_frame_size(pbi, width, height); |
| } |
| |
| static void setup_frame_size_with_refs(VP9D_COMP *pbi, |
| struct vp9_read_bit_buffer *rb) { |
| VP9_COMMON *const cm = &pbi->common; |
| |
| int width, height; |
| int found = 0, i; |
| for (i = 0; i < ALLOWED_REFS_PER_FRAME; ++i) { |
| if (vp9_rb_read_bit(rb)) { |
| YV12_BUFFER_CONFIG *cfg = &cm->yv12_fb[cm->active_ref_idx[i]]; |
| width = cfg->y_crop_width; |
| height = cfg->y_crop_height; |
| found = 1; |
| break; |
| } |
| } |
| |
| if (!found) |
| read_frame_size(cm, rb, &width, &height); |
| |
| setup_display_size(pbi, rb); |
| apply_frame_size(pbi, width, height); |
| } |
| |
| static void update_frame_context(FRAME_CONTEXT *fc) { |
| vp9_copy(fc->pre_coef_probs, fc->coef_probs); |
| vp9_copy(fc->pre_y_mode_prob, fc->y_mode_prob); |
| vp9_copy(fc->pre_uv_mode_prob, fc->uv_mode_prob); |
| vp9_copy(fc->pre_partition_prob, fc->partition_prob[1]); |
| vp9_copy(fc->pre_intra_inter_prob, fc->intra_inter_prob); |
| vp9_copy(fc->pre_comp_inter_prob, fc->comp_inter_prob); |
| vp9_copy(fc->pre_single_ref_prob, fc->single_ref_prob); |
| vp9_copy(fc->pre_comp_ref_prob, fc->comp_ref_prob); |
| fc->pre_nmvc = fc->nmvc; |
| vp9_copy(fc->pre_switchable_interp_prob, fc->switchable_interp_prob); |
| vp9_copy(fc->pre_inter_mode_probs, fc->inter_mode_probs); |
| vp9_copy(fc->pre_tx_probs_8x8p, fc->tx_probs_8x8p); |
| vp9_copy(fc->pre_tx_probs_16x16p, fc->tx_probs_16x16p); |
| vp9_copy(fc->pre_tx_probs_32x32p, fc->tx_probs_32x32p); |
| vp9_copy(fc->pre_mbskip_probs, fc->mbskip_probs); |
| |
| vp9_zero(fc->coef_counts); |
| vp9_zero(fc->eob_branch_counts); |
| vp9_zero(fc->y_mode_counts); |
| vp9_zero(fc->uv_mode_counts); |
| vp9_zero(fc->NMVcount); |
| vp9_zero(fc->inter_mode_counts); |
| vp9_zero(fc->partition_counts); |
| vp9_zero(fc->switchable_interp_count); |
| vp9_zero(fc->intra_inter_count); |
| vp9_zero(fc->comp_inter_count); |
| vp9_zero(fc->single_ref_count); |
| vp9_zero(fc->comp_ref_count); |
| vp9_zero(fc->tx_count_8x8p); |
| vp9_zero(fc->tx_count_16x16p); |
| vp9_zero(fc->tx_count_32x32p); |
| vp9_zero(fc->mbskip_count); |
| } |
| |
| static void decode_tile(VP9D_COMP *pbi, vp9_reader *r) { |
| VP9_COMMON *const pc = &pbi->common; |
| int mi_row, mi_col; |
| |
| for (mi_row = pc->cur_tile_mi_row_start; |
| mi_row < pc->cur_tile_mi_row_end; mi_row += 64 / MI_SIZE) { |
| // For a SB there are 2 left contexts, each pertaining to a MB row within |
| vpx_memset(&pc->left_context, 0, sizeof(pc->left_context)); |
| vpx_memset(pc->left_seg_context, 0, sizeof(pc->left_seg_context)); |
| for (mi_col = pc->cur_tile_mi_col_start; |
| mi_col < pc->cur_tile_mi_col_end; mi_col += 64 / MI_SIZE) |
| decode_modes_sb(pbi, mi_row, mi_col, r, BLOCK_SIZE_SB64X64); |
| } |
| } |
| |
| static void setup_tile_info(VP9_COMMON *cm, struct vp9_read_bit_buffer *rb) { |
| int delta_log2_tiles; |
| |
| vp9_get_tile_n_bits(cm, &cm->log2_tile_columns, &delta_log2_tiles); |
| while (delta_log2_tiles--) { |
| if (vp9_rb_read_bit(rb)) { |
| cm->log2_tile_columns++; |
| } else { |
| break; |
| } |
| } |
| |
| cm->log2_tile_rows = vp9_rb_read_bit(rb); |
| if (cm->log2_tile_rows) |
| cm->log2_tile_rows += vp9_rb_read_bit(rb); |
| |
| cm->tile_columns = 1 << cm->log2_tile_columns; |
| cm->tile_rows = 1 << cm->log2_tile_rows; |
| } |
| |
| static void decode_tiles(VP9D_COMP *pbi, |
| const uint8_t *data, size_t first_partition_size, |
| vp9_reader *residual_bc) { |
| VP9_COMMON *const pc = &pbi->common; |
| |
| const uint8_t *data_ptr = data + first_partition_size; |
| int tile_row, tile_col; |
| |
| // Note: this memset assumes above_context[0], [1] and [2] |
| // are allocated as part of the same buffer. |
| vpx_memset(pc->above_context[0], 0, sizeof(ENTROPY_CONTEXT) * 2 * |
| MAX_MB_PLANE * mi_cols_aligned_to_sb(pc)); |
| |
| vpx_memset(pc->above_seg_context, 0, sizeof(PARTITION_CONTEXT) * |
| mi_cols_aligned_to_sb(pc)); |
| |
| if (pbi->oxcf.inv_tile_order) { |
| const int n_cols = pc->tile_columns; |
| const uint8_t *data_ptr2[4][1 << 6]; |
| vp9_reader bc_bak = {0}; |
| |
| // pre-initialize the offsets, we're going to read in inverse order |
| data_ptr2[0][0] = data_ptr; |
| for (tile_row = 0; tile_row < pc->tile_rows; tile_row++) { |
| if (tile_row) { |
| const int size = read_le32(data_ptr2[tile_row - 1][n_cols - 1]); |
| data_ptr2[tile_row - 1][n_cols - 1] += 4; |
| data_ptr2[tile_row][0] = data_ptr2[tile_row - 1][n_cols - 1] + size; |
| } |
| |
| for (tile_col = 1; tile_col < n_cols; tile_col++) { |
| const int size = read_le32(data_ptr2[tile_row][tile_col - 1]); |
| data_ptr2[tile_row][tile_col - 1] += 4; |
| data_ptr2[tile_row][tile_col] = |
| data_ptr2[tile_row][tile_col - 1] + size; |
| } |
| } |
| |
| for (tile_row = 0; tile_row < pc->tile_rows; tile_row++) { |
| vp9_get_tile_row_offsets(pc, tile_row); |
| for (tile_col = n_cols - 1; tile_col >= 0; tile_col--) { |
| vp9_get_tile_col_offsets(pc, tile_col); |
| setup_token_decoder(pbi, data_ptr2[tile_row][tile_col], residual_bc); |
| decode_tile(pbi, residual_bc); |
| if (tile_row == pc->tile_rows - 1 && tile_col == n_cols - 1) |
| bc_bak = *residual_bc; |
| } |
| } |
| *residual_bc = bc_bak; |
| } else { |
| int has_more; |
| |
| for (tile_row = 0; tile_row < pc->tile_rows; tile_row++) { |
| vp9_get_tile_row_offsets(pc, tile_row); |
| for (tile_col = 0; tile_col < pc->tile_columns; tile_col++) { |
| vp9_get_tile_col_offsets(pc, tile_col); |
| |
| has_more = tile_col < pc->tile_columns - 1 || |
| tile_row < pc->tile_rows - 1; |
| |
| setup_token_decoder(pbi, data_ptr + (has_more ? 4 : 0), residual_bc); |
| decode_tile(pbi, residual_bc); |
| |
| if (has_more) { |
| const int size = read_le32(data_ptr); |
| data_ptr += 4 + size; |
| } |
| } |
| } |
| } |
| } |
| |
| static void check_sync_code(VP9_COMMON *cm, struct vp9_read_bit_buffer *rb) { |
| if (vp9_rb_read_literal(rb, 8) != SYNC_CODE_0 || |
| vp9_rb_read_literal(rb, 8) != SYNC_CODE_1 || |
| vp9_rb_read_literal(rb, 8) != SYNC_CODE_2) { |
| vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM, |
| "Invalid frame sync code"); |
| } |
| } |
| |
| static void error_handler(void *data, int bit_offset) { |
| VP9_COMMON *const cm = (VP9_COMMON *)data; |
| vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, "Truncated packet"); |
| } |
| |
| static void setup_inter_inter(VP9_COMMON *cm) { |
| int i; |
| |
| cm->allow_comp_inter_inter = 0; |
| for (i = 0; i < ALLOWED_REFS_PER_FRAME; ++i) { |
| cm->allow_comp_inter_inter |= i > 0 && |
| cm->ref_frame_sign_bias[i + 1] != cm->ref_frame_sign_bias[1]; |
| } |
| |
| if (cm->allow_comp_inter_inter) { |
| // which one is always-on in comp inter-inter? |
| if (cm->ref_frame_sign_bias[LAST_FRAME] == |
| cm->ref_frame_sign_bias[GOLDEN_FRAME]) { |
| cm->comp_fixed_ref = ALTREF_FRAME; |
| cm->comp_var_ref[0] = LAST_FRAME; |
| cm->comp_var_ref[1] = GOLDEN_FRAME; |
| } else if (cm->ref_frame_sign_bias[LAST_FRAME] == |
| cm->ref_frame_sign_bias[ALTREF_FRAME]) { |
| cm->comp_fixed_ref = GOLDEN_FRAME; |
| cm->comp_var_ref[0] = LAST_FRAME; |
| cm->comp_var_ref[1] = ALTREF_FRAME; |
| } else { |
| cm->comp_fixed_ref = LAST_FRAME; |
| cm->comp_var_ref[0] = GOLDEN_FRAME; |
| cm->comp_var_ref[1] = ALTREF_FRAME; |
| } |
| } |
| } |
| |
| #define RESERVED \ |
| if (vp9_rb_read_bit(rb)) \ |
| vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM, \ |
| "Reserved bit must be unset") |
| |
| static size_t read_uncompressed_header(VP9D_COMP *pbi, |
| struct vp9_read_bit_buffer *rb) { |
| VP9_COMMON *const cm = &pbi->common; |
| MACROBLOCKD *const xd = &pbi->mb; |
| int i; |
| |
| cm->last_frame_type = cm->frame_type; |
| |
| if (vp9_rb_read_literal(rb, 2) != 0x2) |
| vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM, |
| "Invalid frame marker"); |
| |
| cm->version = vp9_rb_read_bit(rb); |
| RESERVED; |
| |
| if (vp9_rb_read_bit(rb)) { |
| // show an existing frame directly |
| int frame_to_show = cm->ref_frame_map[vp9_rb_read_literal(rb, 3)]; |
| ref_cnt_fb(cm->fb_idx_ref_cnt, &cm->new_fb_idx, frame_to_show); |
| pbi->refresh_frame_flags = 0; |
| cm->filter_level = 0; |
| return 0; |
| } |
| |
| cm->frame_type = (FRAME_TYPE) vp9_rb_read_bit(rb); |
| cm->show_frame = vp9_rb_read_bit(rb); |
| cm->error_resilient_mode = vp9_rb_read_bit(rb); |
| |
| if (cm->frame_type == KEY_FRAME) { |
| int csp; |
| |
| check_sync_code(cm, rb); |
| |
| csp = vp9_rb_read_literal(rb, 3); // colorspace |
| if (csp != 7) { // != sRGB |
| vp9_rb_read_bit(rb); // [16,235] (including xvycc) vs [0,255] range |
| if (cm->version == 1) { |
| cm->subsampling_x = vp9_rb_read_bit(rb); |
| cm->subsampling_y = vp9_rb_read_bit(rb); |
| vp9_rb_read_bit(rb); // has extra plane |
| } else { |
| cm->subsampling_y = cm->subsampling_x = 1; |
| } |
| } else { |
| if (cm->version == 1) { |
| cm->subsampling_y = cm->subsampling_x = 0; |
| vp9_rb_read_bit(rb); // has extra plane |
| } else { |
| vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM, |
| "RGB not supported in profile 0"); |
| } |
| } |
| |
| vp9_setup_past_independence(cm, xd); |
| |
| pbi->refresh_frame_flags = (1 << NUM_REF_FRAMES) - 1; |
| |
| for (i = 0; i < ALLOWED_REFS_PER_FRAME; ++i) |
| cm->active_ref_idx[i] = cm->new_fb_idx; |
| |
| setup_frame_size(pbi, rb); |
| } else { |
| cm->intra_only = cm->show_frame ? 0 : vp9_rb_read_bit(rb); |
| |
| if (cm->error_resilient_mode) |
| vp9_setup_past_independence(cm, xd); |
| |
| if (cm->intra_only) { |
| check_sync_code(cm, rb); |
| pbi->refresh_frame_flags = vp9_rb_read_literal(rb, NUM_REF_FRAMES); |
| setup_frame_size(pbi, rb); |
| } else { |
| pbi->refresh_frame_flags = vp9_rb_read_literal(rb, NUM_REF_FRAMES); |
| |
| for (i = 0; i < ALLOWED_REFS_PER_FRAME; ++i) { |
| const int ref = vp9_rb_read_literal(rb, NUM_REF_FRAMES_LG2); |
| cm->active_ref_idx[i] = cm->ref_frame_map[ref]; |
| cm->ref_frame_sign_bias[LAST_FRAME + i] = vp9_rb_read_bit(rb); |
| } |
| |
| setup_frame_size_with_refs(pbi, rb); |
| |
| xd->allow_high_precision_mv = vp9_rb_read_bit(rb); |
| cm->mcomp_filter_type = read_interp_filter_type(rb); |
| |
| for (i = 0; i < ALLOWED_REFS_PER_FRAME; ++i) |
| vp9_setup_scale_factors(cm, i); |
| |
| setup_inter_inter(cm); |
| } |
| } |
| |
| if (!cm->error_resilient_mode) { |
| cm->reset_frame_context = vp9_rb_read_literal(rb, 2); |
| cm->refresh_frame_context = vp9_rb_read_bit(rb); |
| cm->frame_parallel_decoding_mode = vp9_rb_read_bit(rb); |
| } else { |
| cm->reset_frame_context = 0; |
| cm->refresh_frame_context = 0; |
| cm->frame_parallel_decoding_mode = 1; |
| } |
| |
| cm->frame_context_idx = vp9_rb_read_literal(rb, NUM_FRAME_CONTEXTS_LG2); |
| |
| setup_loopfilter(pbi, rb); |
| setup_quantization(pbi, rb); |
| setup_segmentation(pbi, rb); |
| |
| setup_tile_info(cm, rb); |
| |
| return vp9_rb_read_literal(rb, 16); |
| } |
| |
| int vp9_decode_frame(VP9D_COMP *pbi, const uint8_t **p_data_end) { |
| int i; |
| vp9_reader header_bc, residual_bc; |
| VP9_COMMON *const pc = &pbi->common; |
| MACROBLOCKD *const xd = &pbi->mb; |
| |
| const uint8_t *data = pbi->source; |
| const uint8_t *data_end = pbi->source + pbi->source_sz; |
| |
| struct vp9_read_bit_buffer rb = { data, data_end, 0, |
| pc, error_handler }; |
| const size_t first_partition_size = read_uncompressed_header(pbi, &rb); |
| const int keyframe = pc->frame_type == KEY_FRAME; |
| YV12_BUFFER_CONFIG *new_fb = &pc->yv12_fb[pc->new_fb_idx]; |
| |
| if (!first_partition_size) { |
| // showing a frame directly |
| *p_data_end = data + 1; |
| return 0; |
| } |
| data += vp9_rb_bytes_read(&rb); |
| xd->corrupted = 0; |
| new_fb->corrupted = 0; |
| |
| if (!pbi->decoded_key_frame && !keyframe) |
| return -1; |
| |
| vp9_setup_version(pc); |
| if (!read_is_valid(data, first_partition_size, data_end)) |
| vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME, |
| "Truncated packet or corrupt partition 0 length"); |
| |
| xd->mode_info_context = pc->mi; |
| xd->prev_mode_info_context = pc->prev_mi; |
| xd->frame_type = pc->frame_type; |
| xd->mode_info_stride = pc->mode_info_stride; |
| |
| if (vp9_reader_init(&header_bc, data, first_partition_size)) |
| vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR, |
| "Failed to allocate bool decoder 0"); |
| |
| mb_init_dequantizer(pc, &pbi->mb); // MB level dequantizer setup |
| |
| if (!keyframe) |
| vp9_setup_interp_filters(xd, pc->mcomp_filter_type, pc); |
| |
| pc->fc = pc->frame_contexts[pc->frame_context_idx]; |
| |
| update_frame_context(&pc->fc); |
| |
| setup_txfm_mode(pc, xd->lossless, &header_bc); |
| |
| read_coef_probs(pbi, &header_bc); |
| |
| // Initialize xd pointers. Any reference should do for xd->pre, so use 0. |
| setup_pre_planes(xd, &pc->yv12_fb[pc->active_ref_idx[0]], NULL, |
| 0, 0, NULL, NULL); |
| setup_dst_planes(xd, new_fb, 0, 0); |
| |
| // Create the segmentation map structure and set to 0 |
| if (!pc->last_frame_seg_map) |
| CHECK_MEM_ERROR(pc->last_frame_seg_map, |
| vpx_calloc((pc->mi_rows * pc->mi_cols), 1)); |
| |
| vp9_setup_block_dptrs(xd, pc->subsampling_x, pc->subsampling_y); |
| |
| // clear out the coeff buffer |
| for (i = 0; i < MAX_MB_PLANE; ++i) |
| vp9_zero(xd->plane[i].qcoeff); |
| |
| set_prev_mi(pc); |
| |
| vp9_decode_mode_mvs_init(pbi, &header_bc); |
| |
| decode_tiles(pbi, data, first_partition_size, &residual_bc); |
| |
| pc->last_width = pc->width; |
| pc->last_height = pc->height; |
| |
| new_fb->corrupted = vp9_reader_has_error(&header_bc) | xd->corrupted; |
| |
| if (!pbi->decoded_key_frame) { |
| if (keyframe && !new_fb->corrupted) |
| pbi->decoded_key_frame = 1; |
| else |
| vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME, |
| "A stream must start with a complete key frame"); |
| } |
| |
| // Adaptation |
| if (!pc->error_resilient_mode && !pc->frame_parallel_decoding_mode) { |
| vp9_adapt_coef_probs(pc); |
| |
| if (!keyframe) { |
| vp9_adapt_mode_probs(pc); |
| vp9_adapt_mode_context(pc); |
| vp9_adapt_nmv_probs(pc, xd->allow_high_precision_mv); |
| } |
| } |
| |
| if (pc->refresh_frame_context) |
| pc->frame_contexts[pc->frame_context_idx] = pc->fc; |
| |
| *p_data_end = vp9_reader_find_end(&residual_bc); |
| return 0; |
| } |
