| /* |
| * 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_alloccommon.h" |
| #include "vp9/common/vp9_common.h" |
| #include "vp9/common/vp9_entropy.h" |
| #include "vp9/common/vp9_entropymode.h" |
| #include "vp9/common/vp9_extend.h" |
| #include "vp9/common/vp9_pred_common.h" |
| #include "vp9/common/vp9_quant_common.h" |
| #include "vp9/common/vp9_reconintra.h" |
| #include "vp9/common/vp9_reconinter.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_dsubexp.h" |
| #include "vp9/decoder/vp9_idct_blk.h" |
| #include "vp9/decoder/vp9_onyxd_int.h" |
| #include "vp9/decoder/vp9_read_bit_buffer.h" |
| #include "vp9/decoder/vp9_thread.h" |
| #include "vp9/decoder/vp9_treereader.h" |
| |
| static int read_be32(const uint8_t *p) { |
| return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]; |
| } |
| |
| // 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 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 TX_MODE read_tx_mode(vp9_reader *r) { |
| TX_MODE tx_mode = vp9_read_literal(r, 2); |
| if (tx_mode == ALLOW_32X32) |
| tx_mode += vp9_read_bit(r); |
| return tx_mode; |
| } |
| |
| static void read_tx_probs(struct tx_probs *tx_probs, vp9_reader *r) { |
| int i, j; |
| |
| for (i = 0; i < TX_SIZE_CONTEXTS; ++i) |
| for (j = 0; j < TX_SIZES - 3; ++j) |
| if (vp9_read(r, MODE_UPDATE_PROB)) |
| vp9_diff_update_prob(r, &tx_probs->p8x8[i][j]); |
| |
| for (i = 0; i < TX_SIZE_CONTEXTS; ++i) |
| for (j = 0; j < TX_SIZES - 2; ++j) |
| if (vp9_read(r, MODE_UPDATE_PROB)) |
| vp9_diff_update_prob(r, &tx_probs->p16x16[i][j]); |
| |
| for (i = 0; i < TX_SIZE_CONTEXTS; ++i) |
| for (j = 0; j < TX_SIZES - 1; ++j) |
| if (vp9_read(r, MODE_UPDATE_PROB)) |
| vp9_diff_update_prob(r, &tx_probs->p32x32[i][j]); |
| } |
| |
| static void setup_plane_dequants(VP9_COMMON *cm, MACROBLOCKD *xd, int q_index) { |
| int i; |
| xd->plane[0].dequant = cm->y_dequant[q_index]; |
| for (i = 1; i < MAX_MB_PLANE; i++) |
| xd->plane[i].dequant = cm->uv_dequant[q_index]; |
| } |
| |
| static void decode_block(int plane, int block, BLOCK_SIZE plane_bsize, |
| TX_SIZE tx_size, void *arg) { |
| MACROBLOCKD* const xd = arg; |
| struct macroblockd_plane *const pd = &xd->plane[plane]; |
| int16_t* const qcoeff = BLOCK_OFFSET(pd->qcoeff, block); |
| const int stride = pd->dst.stride; |
| const int eob = pd->eobs[block]; |
| const int raster_block = txfrm_block_to_raster_block(plane_bsize, tx_size, |
| block); |
| uint8_t* const dst = raster_block_offset_uint8(plane_bsize, raster_block, |
| pd->dst.buf, stride); |
| switch (tx_size) { |
| case TX_4X4: { |
| const TX_TYPE tx_type = get_tx_type_4x4(pd->plane_type, xd, raster_block); |
| if (tx_type == DCT_DCT) |
| xd->itxm_add(qcoeff, dst, stride, eob); |
| else |
| vp9_iht_add_c(tx_type, qcoeff, dst, stride, eob); |
| break; |
| } |
| case TX_8X8: |
| vp9_iht_add_8x8_c(get_tx_type_8x8(pd->plane_type, xd), qcoeff, dst, |
| stride, eob); |
| break; |
| case TX_16X16: |
| vp9_iht_add_16x16_c(get_tx_type_16x16(pd->plane_type, xd), qcoeff, dst, |
| stride, eob); |
| break; |
| case TX_32X32: |
| vp9_idct_add_32x32(qcoeff, dst, stride, eob); |
| break; |
| default: |
| assert(!"Invalid transform size"); |
| } |
| } |
| |
| static void decode_block_intra(int plane, int block, BLOCK_SIZE plane_bsize, |
| TX_SIZE tx_size, void *arg) { |
| MACROBLOCKD* const xd = arg; |
| struct macroblockd_plane *const pd = &xd->plane[plane]; |
| MODE_INFO *const mi = xd->mode_info_context; |
| const int raster_block = txfrm_block_to_raster_block(plane_bsize, tx_size, |
| block); |
| uint8_t* const dst = raster_block_offset_uint8(plane_bsize, raster_block, |
| pd->dst.buf, pd->dst.stride); |
| const MB_PREDICTION_MODE mode = (plane == 0) |
| ? ((mi->mbmi.sb_type < BLOCK_8X8) ? mi->bmi[raster_block].as_mode |
| : mi->mbmi.mode) |
| : mi->mbmi.uv_mode; |
| |
| if (xd->mb_to_right_edge < 0 || xd->mb_to_bottom_edge < 0) |
| extend_for_intra(xd, plane_bsize, plane, block, tx_size); |
| |
| vp9_predict_intra_block(xd, raster_block >> tx_size, |
| b_width_log2(plane_bsize), tx_size, mode, |
| dst, pd->dst.stride, dst, pd->dst.stride); |
| |
| if (!mi->mbmi.skip_coeff) |
| decode_block(plane, block, plane_bsize, tx_size, arg); |
| } |
| |
| static int decode_tokens(VP9D_COMP *pbi, BLOCK_SIZE bsize, vp9_reader *r) { |
| VP9_COMMON *const cm = &pbi->common; |
| MACROBLOCKD *const xd = &pbi->mb; |
| MB_MODE_INFO *const mbmi = &xd->mode_info_context->mbmi; |
| |
| if (mbmi->skip_coeff) { |
| reset_skip_context(xd, bsize); |
| return -1; |
| } else { |
| if (cm->seg.enabled) |
| setup_plane_dequants(cm, xd, vp9_get_qindex(&cm->seg, mbmi->segment_id, |
| cm->base_qindex)); |
| |
| // TODO(dkovalev) if (!vp9_reader_has_error(r)) |
| return vp9_decode_tokens(pbi, r, bsize); |
| } |
| } |
| |
| static void set_offsets(VP9D_COMP *pbi, BLOCK_SIZE bsize, |
| int mi_row, int mi_col) { |
| VP9_COMMON *const cm = &pbi->common; |
| MACROBLOCKD *const xd = &pbi->mb; |
| const int bh = num_8x8_blocks_high_lookup[bsize]; |
| const int bw = num_8x8_blocks_wide_lookup[bsize]; |
| const int offset = mi_row * cm->mode_info_stride + mi_col; |
| |
| xd->mode_info_context = cm->mi + offset; |
| xd->mode_info_context->mbmi.sb_type = bsize; |
| xd->mode_info_stride = cm->mode_info_stride; |
| // 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 + offset : NULL; |
| |
| set_skip_context(cm, xd, mi_row, mi_col); |
| set_partition_seg_context(cm, xd, mi_row, mi_col); |
| |
| // 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_ref(VP9D_COMP *pbi, int i, 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; |
| const int ref = mbmi->ref_frame[i] - LAST_FRAME; |
| const YV12_BUFFER_CONFIG *cfg = &cm->yv12_fb[cm->active_ref_idx[ref]]; |
| const struct scale_factors *sf = &cm->active_ref_scale[ref]; |
| if (!vp9_is_valid_scale(sf)) |
| vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM, |
| "Invalid scale factors"); |
| |
| xd->scale_factor[i] = *sf; |
| setup_pre_planes(xd, i, cfg, mi_row, mi_col, sf); |
| xd->corrupted |= cfg->corrupted; |
| } |
| |
| static void decode_modes_b(VP9D_COMP *pbi, int mi_row, int mi_col, |
| vp9_reader *r, BLOCK_SIZE bsize) { |
| VP9_COMMON *const cm = &pbi->common; |
| MACROBLOCKD *const xd = &pbi->mb; |
| const int less8x8 = bsize < BLOCK_8X8; |
| MB_MODE_INFO *mbmi; |
| |
| if (less8x8) |
| if (xd->ab_index > 0) |
| return; |
| |
| set_offsets(pbi, bsize, mi_row, mi_col); |
| vp9_read_mode_info(pbi, mi_row, mi_col, r); |
| |
| if (less8x8) |
| bsize = BLOCK_8X8; |
| |
| // Has to be called after set_offsets |
| mbmi = &xd->mode_info_context->mbmi; |
| |
| if (!is_inter_block(mbmi)) { |
| // Intra reconstruction |
| decode_tokens(pbi, bsize, r); |
| foreach_transformed_block(xd, bsize, decode_block_intra, xd); |
| } else { |
| // Inter reconstruction |
| int eobtotal; |
| |
| set_ref(pbi, 0, mi_row, mi_col); |
| if (has_second_ref(mbmi)) |
| set_ref(pbi, 1, mi_row, mi_col); |
| |
| vp9_setup_interp_filters(xd, mbmi->interp_filter, cm); |
| vp9_build_inter_predictors_sb(xd, mi_row, mi_col, bsize); |
| eobtotal = decode_tokens(pbi, bsize, r); |
| if (less8x8) { |
| if (eobtotal >= 0) |
| foreach_transformed_block(xd, bsize, decode_block, xd); |
| } else { |
| assert(mbmi->sb_type == bsize); |
| if (eobtotal == 0) |
| // skip loopfilter |
| vp9_set_pred_flag_mbskip(cm, bsize, mi_row, mi_col, 1); |
| else if (eobtotal > 0) |
| foreach_transformed_block(xd, bsize, decode_block, xd); |
| } |
| } |
| 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 bsize) { |
| VP9_COMMON *const cm = &pbi->common; |
| MACROBLOCKD *const xd = &pbi->mb; |
| const int hbs = num_8x8_blocks_wide_lookup[bsize] / 2; |
| PARTITION_TYPE partition = PARTITION_NONE; |
| BLOCK_SIZE subsize; |
| |
| if (mi_row >= cm->mi_rows || mi_col >= cm->mi_cols) |
| return; |
| |
| if (bsize < BLOCK_8X8) { |
| if (xd->ab_index != 0) |
| return; |
| } else { |
| int pl; |
| const int idx = check_bsize_coverage(hbs, cm->mi_rows, cm->mi_cols, |
| mi_row, mi_col); |
| set_partition_seg_context(cm, xd, mi_row, mi_col); |
| pl = partition_plane_context(xd, bsize); |
| |
| if (idx == 0) |
| partition = treed_read(r, vp9_partition_tree, |
| cm->fc.partition_prob[cm->frame_type][pl]); |
| else if (idx > 0 && |
| !vp9_read(r, cm->fc.partition_prob[cm->frame_type][pl][idx])) |
| partition = (idx == 1) ? PARTITION_HORZ : PARTITION_VERT; |
| else |
| partition = PARTITION_SPLIT; |
| |
| cm->counts.partition[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 + hbs < cm->mi_rows) |
| decode_modes_b(pbi, mi_row + hbs, 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 + hbs < cm->mi_cols) |
| decode_modes_b(pbi, mi_row, mi_col + hbs, r, subsize); |
| break; |
| case PARTITION_SPLIT: { |
| int n; |
| for (n = 0; n < 4; n++) { |
| const int j = n >> 1, i = n & 1; |
| *get_sb_index(xd, subsize) = n; |
| decode_modes_sb(pbi, mi_row + j * hbs, mi_col + i * hbs, r, subsize); |
| } |
| } break; |
| default: |
| assert(!"Invalid partition type"); |
| } |
| |
| // update partition context |
| if (bsize >= BLOCK_8X8 && |
| (bsize == BLOCK_8X8 || partition != PARTITION_SPLIT)) { |
| set_partition_seg_context(cm, xd, mi_row, mi_col); |
| update_partition_context(xd, subsize, bsize); |
| } |
| } |
| |
| static void setup_token_decoder(VP9D_COMP *pbi, |
| const uint8_t *data, size_t read_size, |
| vp9_reader *r) { |
| VP9_COMMON *cm = &pbi->common; |
| const uint8_t *data_end = pbi->source + pbi->source_sz; |
| |
| // 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, read_size, data_end)) |
| vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, |
| "Truncated packet or corrupt tile length"); |
| |
| if (vp9_reader_init(r, data, read_size)) |
| vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR, |
| "Failed to allocate bool decoder %d", 1); |
| } |
| |
| static void read_coef_probs_common(vp9_coeff_probs_model *coef_probs, |
| vp9_reader *r) { |
| 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++) |
| if (k > 0 || l < 3) |
| for (m = 0; m < UNCONSTRAINED_NODES; m++) |
| if (vp9_read(r, VP9_COEF_UPDATE_PROB)) |
| vp9_diff_update_prob(r, &coef_probs[i][j][k][l][m]); |
| } |
| |
| static void read_coef_probs(FRAME_CONTEXT *fc, TX_MODE tx_mode, |
| vp9_reader *r) { |
| read_coef_probs_common(fc->coef_probs[TX_4X4], r); |
| |
| if (tx_mode > ONLY_4X4) |
| read_coef_probs_common(fc->coef_probs[TX_8X8], r); |
| |
| if (tx_mode > ALLOW_8X8) |
| read_coef_probs_common(fc->coef_probs[TX_16X16], r); |
| |
| if (tx_mode > ALLOW_16X16) |
| read_coef_probs_common(fc->coef_probs[TX_32X32], r); |
| } |
| |
| static void setup_segmentation(struct segmentation *seg, |
| struct vp9_read_bit_buffer *rb) { |
| int i, j; |
| |
| seg->update_map = 0; |
| seg->update_data = 0; |
| |
| seg->enabled = vp9_rb_read_bit(rb); |
| if (!seg->enabled) |
| return; |
| |
| // Segmentation map update |
| seg->update_map = vp9_rb_read_bit(rb); |
| if (seg->update_map) { |
| for (i = 0; i < SEG_TREE_PROBS; i++) |
| seg->tree_probs[i] = vp9_rb_read_bit(rb) ? vp9_rb_read_literal(rb, 8) |
| : MAX_PROB; |
| |
| seg->temporal_update = vp9_rb_read_bit(rb); |
| if (seg->temporal_update) { |
| for (i = 0; i < PREDICTION_PROBS; i++) |
| seg->pred_probs[i] = vp9_rb_read_bit(rb) ? vp9_rb_read_literal(rb, 8) |
| : MAX_PROB; |
| } else { |
| for (i = 0; i < PREDICTION_PROBS; i++) |
| seg->pred_probs[i] = MAX_PROB; |
| } |
| } |
| |
| // Segmentation data update |
| seg->update_data = vp9_rb_read_bit(rb); |
| if (seg->update_data) { |
| seg->abs_delta = vp9_rb_read_bit(rb); |
| |
| vp9_clearall_segfeatures(seg); |
| |
| for (i = 0; i < MAX_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(seg, 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(seg, i, j, data); |
| } |
| } |
| } |
| } |
| |
| static void setup_loopfilter(struct loopfilter *lf, |
| struct vp9_read_bit_buffer *rb) { |
| |
| lf->filter_level = vp9_rb_read_literal(rb, 6); |
| lf->sharpness_level = vp9_rb_read_literal(rb, 3); |
| |
| // Read in loop filter deltas applied at the MB level based on mode or ref |
| // frame. |
| lf->mode_ref_delta_update = 0; |
| |
| lf->mode_ref_delta_enabled = vp9_rb_read_bit(rb); |
| if (lf->mode_ref_delta_enabled) { |
| lf->mode_ref_delta_update = vp9_rb_read_bit(rb); |
| if (lf->mode_ref_delta_update) { |
| int i; |
| |
| for (i = 0; i < MAX_REF_LF_DELTAS; i++) |
| if (vp9_rb_read_bit(rb)) |
| lf->ref_deltas[i] = vp9_rb_read_signed_literal(rb, 6); |
| |
| for (i = 0; i < MAX_MODE_LF_DELTAS; i++) |
| if (vp9_rb_read_bit(rb)) |
| lf->mode_deltas[i] = vp9_rb_read_signed_literal(rb, 6); |
| } |
| } |
| } |
| |
| static int read_delta_q(struct vp9_read_bit_buffer *rb, int *delta_q) { |
| const int old = *delta_q; |
| *delta_q = vp9_rb_read_bit(rb) ? vp9_rb_read_signed_literal(rb, 4) : 0; |
| 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; |
| |
| xd->itxm_add = xd->lossless ? vp9_idct_add_lossless_c |
| : vp9_idct_add; |
| } |
| |
| static INTERPOLATIONFILTERTYPE read_interp_filter_type( |
| struct vp9_read_bit_buffer *rb) { |
| const INTERPOLATIONFILTERTYPE literal_to_type[] = { EIGHTTAP_SMOOTH, |
| EIGHTTAP, |
| EIGHTTAP_SHARP }; |
| return vp9_rb_read_bit(rb) ? SWITCHABLE |
| : literal_to_type[vp9_rb_read_literal(rb, 2)]; |
| } |
| |
| static void read_frame_size(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(VP9_COMMON *cm, struct vp9_read_bit_buffer *rb) { |
| cm->display_width = cm->width; |
| cm->display_height = cm->height; |
| if (vp9_rb_read_bit(rb)) |
| read_frame_size(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) { |
| int width, height; |
| read_frame_size(rb, &width, &height); |
| apply_frame_size(pbi, width, height); |
| setup_display_size(&pbi->common, rb); |
| } |
| |
| 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(rb, &width, &height); |
| |
| if (!width || !height) |
| vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, |
| "Referenced frame with invalid size"); |
| |
| apply_frame_size(pbi, width, height); |
| setup_display_size(cm, rb); |
| } |
| |
| static void decode_tile(VP9D_COMP *pbi, vp9_reader *r) { |
| const int num_threads = pbi->oxcf.max_threads; |
| VP9_COMMON *const cm = &pbi->common; |
| int mi_row, mi_col; |
| YV12_BUFFER_CONFIG *const fb = &cm->yv12_fb[cm->new_fb_idx]; |
| |
| if (pbi->do_loopfilter_inline) { |
| if (num_threads > 1) { |
| LFWorkerData *const lf_data = (LFWorkerData*)pbi->lf_worker.data1; |
| lf_data->frame_buffer = fb; |
| lf_data->cm = cm; |
| lf_data->xd = pbi->mb; |
| lf_data->stop = 0; |
| lf_data->y_only = 0; |
| } |
| vp9_loop_filter_frame_init(cm, cm->lf.filter_level); |
| } |
| |
| for (mi_row = cm->cur_tile_mi_row_start; mi_row < cm->cur_tile_mi_row_end; |
| mi_row += MI_BLOCK_SIZE) { |
| // For a SB there are 2 left contexts, each pertaining to a MB row within |
| vp9_zero(cm->left_context); |
| vp9_zero(cm->left_seg_context); |
| for (mi_col = cm->cur_tile_mi_col_start; mi_col < cm->cur_tile_mi_col_end; |
| mi_col += MI_BLOCK_SIZE) |
| decode_modes_sb(pbi, mi_row, mi_col, r, BLOCK_64X64); |
| |
| if (pbi->do_loopfilter_inline) { |
| // delay the loopfilter by 1 macroblock row. |
| const int lf_start = mi_row - MI_BLOCK_SIZE; |
| if (lf_start < 0) continue; |
| |
| if (num_threads > 1) { |
| LFWorkerData *const lf_data = (LFWorkerData*)pbi->lf_worker.data1; |
| |
| // decoding has completed: finish up the loop filter in this thread. |
| if (mi_row + MI_BLOCK_SIZE >= cm->cur_tile_mi_row_end) continue; |
| |
| vp9_worker_sync(&pbi->lf_worker); |
| lf_data->start = lf_start; |
| lf_data->stop = mi_row; |
| pbi->lf_worker.hook = vp9_loop_filter_worker; |
| vp9_worker_launch(&pbi->lf_worker); |
| } else { |
| vp9_loop_filter_rows(fb, cm, &pbi->mb, lf_start, mi_row, 0); |
| } |
| } |
| } |
| |
| if (pbi->do_loopfilter_inline) { |
| int lf_start; |
| if (num_threads > 1) { |
| LFWorkerData *const lf_data = (LFWorkerData*)pbi->lf_worker.data1; |
| |
| vp9_worker_sync(&pbi->lf_worker); |
| lf_start = lf_data->stop; |
| } else { |
| lf_start = mi_row - MI_BLOCK_SIZE; |
| } |
| vp9_loop_filter_rows(fb, cm, &pbi->mb, |
| lf_start, cm->mi_rows, 0); |
| } |
| } |
| |
| static void setup_tile_info(VP9_COMMON *cm, struct vp9_read_bit_buffer *rb) { |
| int min_log2_tile_cols, max_log2_tile_cols, max_ones; |
| vp9_get_tile_n_bits(cm->mi_cols, &min_log2_tile_cols, &max_log2_tile_cols); |
| |
| // columns |
| max_ones = max_log2_tile_cols - min_log2_tile_cols; |
| cm->log2_tile_cols = min_log2_tile_cols; |
| while (max_ones-- && vp9_rb_read_bit(rb)) |
| cm->log2_tile_cols++; |
| |
| // rows |
| cm->log2_tile_rows = vp9_rb_read_bit(rb); |
| if (cm->log2_tile_rows) |
| cm->log2_tile_rows += vp9_rb_read_bit(rb); |
| } |
| |
| static const uint8_t *decode_tiles(VP9D_COMP *pbi, const uint8_t *data) { |
| vp9_reader residual_bc; |
| |
| VP9_COMMON *const cm = &pbi->common; |
| |
| const uint8_t *const data_end = pbi->source + pbi->source_sz; |
| const int aligned_mi_cols = mi_cols_aligned_to_sb(cm->mi_cols); |
| const int tile_cols = 1 << cm->log2_tile_cols; |
| const int tile_rows = 1 << cm->log2_tile_rows; |
| 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(cm->above_context[0], 0, |
| sizeof(ENTROPY_CONTEXT) * MAX_MB_PLANE * (2 * aligned_mi_cols)); |
| |
| vpx_memset(cm->above_seg_context, 0, |
| sizeof(PARTITION_CONTEXT) * aligned_mi_cols); |
| |
| if (pbi->oxcf.inv_tile_order) { |
| 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; |
| for (tile_row = 0; tile_row < tile_rows; tile_row++) { |
| if (tile_row) { |
| const int size = read_be32(data_ptr2[tile_row - 1][tile_cols - 1]); |
| data_ptr2[tile_row - 1][tile_cols - 1] += 4; |
| data_ptr2[tile_row][0] = data_ptr2[tile_row - 1][tile_cols - 1] + size; |
| } |
| |
| for (tile_col = 1; tile_col < tile_cols; tile_col++) { |
| const int size = read_be32(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 < tile_rows; tile_row++) { |
| vp9_get_tile_row_offsets(cm, tile_row); |
| for (tile_col = tile_cols - 1; tile_col >= 0; tile_col--) { |
| vp9_get_tile_col_offsets(cm, tile_col); |
| setup_token_decoder(pbi, data_ptr2[tile_row][tile_col], |
| data_end - data_ptr2[tile_row][tile_col], |
| &residual_bc); |
| decode_tile(pbi, &residual_bc); |
| if (tile_row == tile_rows - 1 && tile_col == tile_cols - 1) |
| bc_bak = residual_bc; |
| } |
| } |
| residual_bc = bc_bak; |
| } else { |
| int has_more; |
| |
| for (tile_row = 0; tile_row < tile_rows; tile_row++) { |
| vp9_get_tile_row_offsets(cm, tile_row); |
| for (tile_col = 0; tile_col < tile_cols; tile_col++) { |
| size_t size; |
| |
| vp9_get_tile_col_offsets(cm, tile_col); |
| |
| has_more = tile_col < tile_cols - 1 || tile_row < tile_rows - 1; |
| if (has_more) { |
| if (!read_is_valid(data, 4, data_end)) |
| vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, |
| "Truncated packet or corrupt tile length"); |
| |
| size = read_be32(data); |
| data += 4; |
| } else { |
| size = data_end - data; |
| } |
| |
| setup_token_decoder(pbi, data, size, &residual_bc); |
| decode_tile(pbi, &residual_bc); |
| data += size; |
| } |
| } |
| } |
| |
| return vp9_reader_find_end(&residual_bc); |
| } |
| |
| 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, size_t 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 = 1; i < ALLOWED_REFS_PER_FRAME; ++i) |
| cm->allow_comp_inter_inter |= |
| 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->lf.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"); |
| } |
| } |
| |
| 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); |
| |
| cm->reset_frame_context = cm->error_resilient_mode ? |
| 0 : vp9_rb_read_literal(rb, 2); |
| |
| 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_LOG2); |
| 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->refresh_frame_context = vp9_rb_read_bit(rb); |
| cm->frame_parallel_decoding_mode = vp9_rb_read_bit(rb); |
| } else { |
| cm->refresh_frame_context = 0; |
| cm->frame_parallel_decoding_mode = 1; |
| } |
| |
| cm->frame_context_idx = vp9_rb_read_literal(rb, NUM_FRAME_CONTEXTS_LOG2); |
| |
| if (cm->frame_type == KEY_FRAME || cm->error_resilient_mode || cm->intra_only) |
| vp9_setup_past_independence(cm); |
| |
| setup_loopfilter(&cm->lf, rb); |
| setup_quantization(pbi, rb); |
| setup_segmentation(&cm->seg, rb); |
| |
| setup_tile_info(cm, rb); |
| |
| return vp9_rb_read_literal(rb, 16); |
| } |
| |
| static int read_compressed_header(VP9D_COMP *pbi, const uint8_t *data, |
| size_t partition_size) { |
| VP9_COMMON *const cm = &pbi->common; |
| MACROBLOCKD *const xd = &pbi->mb; |
| vp9_reader r; |
| |
| if (vp9_reader_init(&r, data, partition_size)) |
| vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR, |
| "Failed to allocate bool decoder 0"); |
| |
| cm->tx_mode = xd->lossless ? ONLY_4X4 : read_tx_mode(&r); |
| if (cm->tx_mode == TX_MODE_SELECT) |
| read_tx_probs(&cm->fc.tx_probs, &r); |
| read_coef_probs(&cm->fc, cm->tx_mode, &r); |
| |
| vp9_prepare_read_mode_info(pbi, &r); |
| |
| return vp9_reader_has_error(&r); |
| } |
| |
| void vp9_init_dequantizer(VP9_COMMON *cm) { |
| int q; |
| |
| for (q = 0; q < QINDEX_RANGE; q++) { |
| cm->y_dequant[q][0] = vp9_dc_quant(q, cm->y_dc_delta_q); |
| cm->y_dequant[q][1] = vp9_ac_quant(q, 0); |
| |
| cm->uv_dequant[q][0] = vp9_dc_quant(q, cm->uv_dc_delta_q); |
| cm->uv_dequant[q][1] = vp9_ac_quant(q, cm->uv_ac_delta_q); |
| } |
| } |
| |
| int vp9_decode_frame(VP9D_COMP *pbi, const uint8_t **p_data_end) { |
| int i; |
| VP9_COMMON *const cm = &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, |
| cm, error_handler }; |
| const size_t first_partition_size = read_uncompressed_header(pbi, &rb); |
| const int keyframe = cm->frame_type == KEY_FRAME; |
| YV12_BUFFER_CONFIG *new_fb = &cm->yv12_fb[cm->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; |
| pbi->do_loopfilter_inline = |
| (cm->log2_tile_rows | cm->log2_tile_cols) == 0 && cm->lf.filter_level; |
| |
| if (!pbi->decoded_key_frame && !keyframe) |
| return -1; |
| |
| if (!read_is_valid(data, first_partition_size, data_end)) |
| vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, |
| "Truncated packet or corrupt header length"); |
| |
| setup_plane_dequants(cm, &pbi->mb, cm->base_qindex); |
| |
| cm->fc = cm->frame_contexts[cm->frame_context_idx]; |
| |
| vp9_zero(cm->counts); |
| |
| new_fb->corrupted |= read_compressed_header(pbi, data, first_partition_size); |
| |
| setup_block_dptrs(xd, cm->subsampling_x, cm->subsampling_y); |
| |
| // clear out the coeff buffer |
| for (i = 0; i < MAX_MB_PLANE; ++i) |
| vp9_zero(xd->plane[i].qcoeff); |
| |
| set_prev_mi(cm); |
| |
| *p_data_end = decode_tiles(pbi, data + first_partition_size); |
| |
| cm->last_width = cm->width; |
| cm->last_height = cm->height; |
| |
| new_fb->corrupted |= xd->corrupted; |
| |
| if (!pbi->decoded_key_frame) { |
| if (keyframe && !new_fb->corrupted) |
| pbi->decoded_key_frame = 1; |
| else |
| vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, |
| "A stream must start with a complete key frame"); |
| } |
| |
| if (!cm->error_resilient_mode && !cm->frame_parallel_decoding_mode) { |
| vp9_adapt_coef_probs(cm); |
| |
| if (!keyframe && !cm->intra_only) { |
| vp9_adapt_mode_probs(cm); |
| vp9_adapt_mv_probs(cm, xd->allow_high_precision_mv); |
| } |
| } |
| |
| if (cm->refresh_frame_context) |
| cm->frame_contexts[cm->frame_context_idx] = cm->fc; |
| |
| return 0; |
| } |
