2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
12 #include <stdlib.h> // qsort()
14 #include "./vp9_rtcd.h"
15 #include "./vpx_scale_rtcd.h"
17 #include "vpx_mem/vpx_mem.h"
18 #include "vpx_ports/mem_ops.h"
19 #include "vpx_scale/vpx_scale.h"
21 #include "vp9/common/vp9_alloccommon.h"
22 #include "vp9/common/vp9_common.h"
23 #include "vp9/common/vp9_entropy.h"
24 #include "vp9/common/vp9_entropymode.h"
25 #include "vp9/common/vp9_idct.h"
26 #include "vp9/common/vp9_pred_common.h"
27 #include "vp9/common/vp9_quant_common.h"
28 #include "vp9/common/vp9_reconintra.h"
29 #include "vp9/common/vp9_reconinter.h"
30 #include "vp9/common/vp9_seg_common.h"
31 #include "vp9/common/vp9_tile_common.h"
33 #include "vp9/decoder/vp9_decodeframe.h"
34 #include "vp9/decoder/vp9_detokenize.h"
35 #include "vp9/decoder/vp9_decodemv.h"
36 #include "vp9/decoder/vp9_dsubexp.h"
37 #include "vp9/decoder/vp9_dthread.h"
38 #include "vp9/decoder/vp9_onyxd.h"
39 #include "vp9/decoder/vp9_read_bit_buffer.h"
40 #include "vp9/decoder/vp9_reader.h"
41 #include "vp9/decoder/vp9_thread.h"
43 static int is_compound_reference_allowed(const VP9_COMMON *cm) {
45 for (i = 1; i < REFS_PER_FRAME; ++i)
46 if (cm->ref_frame_sign_bias[i + 1] != cm->ref_frame_sign_bias[1])
52 static void setup_compound_reference_mode(VP9_COMMON *cm) {
53 if (cm->ref_frame_sign_bias[LAST_FRAME] ==
54 cm->ref_frame_sign_bias[GOLDEN_FRAME]) {
55 cm->comp_fixed_ref = ALTREF_FRAME;
56 cm->comp_var_ref[0] = LAST_FRAME;
57 cm->comp_var_ref[1] = GOLDEN_FRAME;
58 } else if (cm->ref_frame_sign_bias[LAST_FRAME] ==
59 cm->ref_frame_sign_bias[ALTREF_FRAME]) {
60 cm->comp_fixed_ref = GOLDEN_FRAME;
61 cm->comp_var_ref[0] = LAST_FRAME;
62 cm->comp_var_ref[1] = ALTREF_FRAME;
64 cm->comp_fixed_ref = LAST_FRAME;
65 cm->comp_var_ref[0] = GOLDEN_FRAME;
66 cm->comp_var_ref[1] = ALTREF_FRAME;
70 static int read_is_valid(const uint8_t *start, size_t len, const uint8_t *end) {
71 return len != 0 && len <= (size_t)(end - start);
74 static int decode_unsigned_max(struct vp9_read_bit_buffer *rb, int max) {
75 const int data = vp9_rb_read_literal(rb, get_unsigned_bits(max));
76 return data > max ? max : data;
79 static TX_MODE read_tx_mode(vp9_reader *r) {
80 TX_MODE tx_mode = vp9_read_literal(r, 2);
81 if (tx_mode == ALLOW_32X32)
82 tx_mode += vp9_read_bit(r);
86 static void read_tx_mode_probs(struct tx_probs *tx_probs, vp9_reader *r) {
89 for (i = 0; i < TX_SIZE_CONTEXTS; ++i)
90 for (j = 0; j < TX_SIZES - 3; ++j)
91 vp9_diff_update_prob(r, &tx_probs->p8x8[i][j]);
93 for (i = 0; i < TX_SIZE_CONTEXTS; ++i)
94 for (j = 0; j < TX_SIZES - 2; ++j)
95 vp9_diff_update_prob(r, &tx_probs->p16x16[i][j]);
97 for (i = 0; i < TX_SIZE_CONTEXTS; ++i)
98 for (j = 0; j < TX_SIZES - 1; ++j)
99 vp9_diff_update_prob(r, &tx_probs->p32x32[i][j]);
102 static void read_switchable_interp_probs(FRAME_CONTEXT *fc, vp9_reader *r) {
104 for (j = 0; j < SWITCHABLE_FILTER_CONTEXTS; ++j)
105 for (i = 0; i < SWITCHABLE_FILTERS - 1; ++i)
106 vp9_diff_update_prob(r, &fc->switchable_interp_prob[j][i]);
109 static void read_inter_mode_probs(FRAME_CONTEXT *fc, vp9_reader *r) {
111 for (i = 0; i < INTER_MODE_CONTEXTS; ++i)
112 for (j = 0; j < INTER_MODES - 1; ++j)
113 vp9_diff_update_prob(r, &fc->inter_mode_probs[i][j]);
116 static REFERENCE_MODE read_frame_reference_mode(const VP9_COMMON *cm,
118 if (is_compound_reference_allowed(cm)) {
119 return vp9_read_bit(r) ? (vp9_read_bit(r) ? REFERENCE_MODE_SELECT
120 : COMPOUND_REFERENCE)
123 return SINGLE_REFERENCE;
127 static void read_frame_reference_mode_probs(VP9_COMMON *cm, vp9_reader *r) {
128 FRAME_CONTEXT *const fc = &cm->fc;
131 if (cm->reference_mode == REFERENCE_MODE_SELECT)
132 for (i = 0; i < COMP_INTER_CONTEXTS; ++i)
133 vp9_diff_update_prob(r, &fc->comp_inter_prob[i]);
135 if (cm->reference_mode != COMPOUND_REFERENCE)
136 for (i = 0; i < REF_CONTEXTS; ++i) {
137 vp9_diff_update_prob(r, &fc->single_ref_prob[i][0]);
138 vp9_diff_update_prob(r, &fc->single_ref_prob[i][1]);
141 if (cm->reference_mode != SINGLE_REFERENCE)
142 for (i = 0; i < REF_CONTEXTS; ++i)
143 vp9_diff_update_prob(r, &fc->comp_ref_prob[i]);
146 static void update_mv_probs(vp9_prob *p, int n, vp9_reader *r) {
148 for (i = 0; i < n; ++i)
149 if (vp9_read(r, MV_UPDATE_PROB))
150 p[i] = (vp9_read_literal(r, 7) << 1) | 1;
153 static void read_mv_probs(nmv_context *ctx, int allow_hp, vp9_reader *r) {
156 update_mv_probs(ctx->joints, MV_JOINTS - 1, r);
158 for (i = 0; i < 2; ++i) {
159 nmv_component *const comp_ctx = &ctx->comps[i];
160 update_mv_probs(&comp_ctx->sign, 1, r);
161 update_mv_probs(comp_ctx->classes, MV_CLASSES - 1, r);
162 update_mv_probs(comp_ctx->class0, CLASS0_SIZE - 1, r);
163 update_mv_probs(comp_ctx->bits, MV_OFFSET_BITS, r);
166 for (i = 0; i < 2; ++i) {
167 nmv_component *const comp_ctx = &ctx->comps[i];
168 for (j = 0; j < CLASS0_SIZE; ++j)
169 update_mv_probs(comp_ctx->class0_fp[j], MV_FP_SIZE - 1, r);
170 update_mv_probs(comp_ctx->fp, 3, r);
174 for (i = 0; i < 2; ++i) {
175 nmv_component *const comp_ctx = &ctx->comps[i];
176 update_mv_probs(&comp_ctx->class0_hp, 1, r);
177 update_mv_probs(&comp_ctx->hp, 1, r);
182 static void setup_plane_dequants(VP9_COMMON *cm, MACROBLOCKD *xd, int q_index) {
184 xd->plane[0].dequant = cm->y_dequant[q_index];
186 for (i = 1; i < MAX_MB_PLANE; i++)
187 xd->plane[i].dequant = cm->uv_dequant[q_index];
190 // Allocate storage for each tile column.
191 // TODO(jzern): when max_threads <= 1 the same storage could be used for each
193 static void alloc_tile_storage(VP9D_COMP *pbi, int tile_rows, int tile_cols) {
194 VP9_COMMON *const cm = &pbi->common;
195 const int aligned_mi_cols = mi_cols_aligned_to_sb(cm->mi_cols);
196 int i, tile_row, tile_col;
198 CHECK_MEM_ERROR(cm, pbi->mi_streams,
199 vpx_realloc(pbi->mi_streams, tile_rows * tile_cols *
200 sizeof(*pbi->mi_streams)));
201 for (tile_row = 0; tile_row < tile_rows; ++tile_row) {
202 for (tile_col = 0; tile_col < tile_cols; ++tile_col) {
204 vp9_tile_init(&tile, cm, tile_row, tile_col);
205 pbi->mi_streams[tile_row * tile_cols + tile_col] =
206 &cm->mi[tile.mi_row_start * cm->mode_info_stride
207 + tile.mi_col_start];
211 // 2 contexts per 'mi unit', so that we have one context per 4x4 txfm
212 // block where mi unit size is 8x8.
213 CHECK_MEM_ERROR(cm, pbi->above_context[0],
214 vpx_realloc(pbi->above_context[0],
215 sizeof(*pbi->above_context[0]) * MAX_MB_PLANE *
216 2 * aligned_mi_cols));
217 for (i = 1; i < MAX_MB_PLANE; ++i) {
218 pbi->above_context[i] = pbi->above_context[0] +
219 i * sizeof(*pbi->above_context[0]) *
223 // This is sized based on the entire frame. Each tile operates within its
225 CHECK_MEM_ERROR(cm, pbi->above_seg_context,
226 vpx_realloc(pbi->above_seg_context,
227 sizeof(*pbi->above_seg_context) *
231 static void inverse_transform_block(MACROBLOCKD* xd, int plane, int block,
232 TX_SIZE tx_size, uint8_t *dst, int stride,
234 struct macroblockd_plane *const pd = &xd->plane[plane];
237 const int plane_type = pd->plane_type;
238 int16_t *const dqcoeff = BLOCK_OFFSET(pd->dqcoeff, block);
241 tx_type = get_tx_type_4x4(plane_type, xd, block);
242 if (tx_type == DCT_DCT)
243 xd->itxm_add(dqcoeff, dst, stride, eob);
245 vp9_iht4x4_16_add(dqcoeff, dst, stride, tx_type);
248 tx_type = get_tx_type(plane_type, xd);
249 vp9_iht8x8_add(tx_type, dqcoeff, dst, stride, eob);
252 tx_type = get_tx_type(plane_type, xd);
253 vp9_iht16x16_add(tx_type, dqcoeff, dst, stride, eob);
257 vp9_idct32x32_add(dqcoeff, dst, stride, eob);
260 assert(0 && "Invalid transform size");
264 vpx_memset(dqcoeff, 0, 2 * sizeof(dqcoeff[0]));
266 if (tx_type == DCT_DCT && tx_size <= TX_16X16 && eob <= 10)
267 vpx_memset(dqcoeff, 0, 4 * (4 << tx_size) * sizeof(dqcoeff[0]));
268 else if (tx_size == TX_32X32 && eob <= 34)
269 vpx_memset(dqcoeff, 0, 256 * sizeof(dqcoeff[0]));
271 vpx_memset(dqcoeff, 0, (16 << (tx_size << 1)) * sizeof(dqcoeff[0]));
282 static void predict_and_reconstruct_intra_block(int plane, int block,
283 BLOCK_SIZE plane_bsize,
284 TX_SIZE tx_size, void *arg) {
285 struct intra_args *const args = arg;
286 VP9_COMMON *const cm = args->cm;
287 MACROBLOCKD *const xd = args->xd;
288 struct macroblockd_plane *const pd = &xd->plane[plane];
289 MODE_INFO *const mi = xd->mi_8x8[0];
290 const MB_PREDICTION_MODE mode = (plane == 0) ? get_y_mode(mi, block)
294 txfrm_block_to_raster_xy(plane_bsize, tx_size, block, &x, &y);
295 dst = &pd->dst.buf[4 * y * pd->dst.stride + 4 * x];
297 vp9_predict_intra_block(xd, block >> (tx_size << 1),
298 b_width_log2(plane_bsize), tx_size, mode,
299 dst, pd->dst.stride, dst, pd->dst.stride,
302 if (!mi->mbmi.skip) {
303 const int eob = vp9_decode_block_tokens(cm, xd, plane, block,
304 plane_bsize, x, y, tx_size,
306 inverse_transform_block(xd, plane, block, tx_size, dst, pd->dst.stride,
318 static void reconstruct_inter_block(int plane, int block,
319 BLOCK_SIZE plane_bsize,
320 TX_SIZE tx_size, void *arg) {
321 struct inter_args *args = arg;
322 VP9_COMMON *const cm = args->cm;
323 MACROBLOCKD *const xd = args->xd;
324 struct macroblockd_plane *const pd = &xd->plane[plane];
326 txfrm_block_to_raster_xy(plane_bsize, tx_size, block, &x, &y);
327 eob = vp9_decode_block_tokens(cm, xd, plane, block, plane_bsize, x, y,
329 inverse_transform_block(xd, plane, block, tx_size,
330 &pd->dst.buf[4 * y * pd->dst.stride + 4 * x],
331 pd->dst.stride, eob);
332 *args->eobtotal += eob;
335 static void set_offsets(VP9_COMMON *const cm, MACROBLOCKD *const xd,
336 const TileInfo *const tile,
337 BLOCK_SIZE bsize, int mi_row, int mi_col) {
338 const int bw = num_8x8_blocks_wide_lookup[bsize];
339 const int bh = num_8x8_blocks_high_lookup[bsize];
340 const int x_mis = MIN(bw, cm->mi_cols - mi_col);
341 const int y_mis = MIN(bh, cm->mi_rows - mi_row);
342 const int offset = mi_row * cm->mode_info_stride + mi_col;
343 const int tile_offset = tile->mi_row_start * cm->mode_info_stride +
347 xd->mi_8x8 = cm->mi_grid_visible + offset;
348 xd->prev_mi_8x8 = cm->prev_mi_grid_visible + offset;
350 xd->last_mi = cm->coding_use_prev_mi && cm->prev_mi ?
351 xd->prev_mi_8x8[0] : NULL;
353 xd->mi_8x8[0] = xd->mi_stream + offset - tile_offset;
354 xd->mi_8x8[0]->mbmi.sb_type = bsize;
355 for (y = 0; y < y_mis; ++y)
356 for (x = !y; x < x_mis; ++x)
357 xd->mi_8x8[y * cm->mode_info_stride + x] = xd->mi_8x8[0];
359 set_skip_context(xd, xd->above_context, xd->left_context, mi_row, mi_col);
361 // Distance of Mb to the various image edges. These are specified to 8th pel
362 // as they are always compared to values that are in 1/8th pel units
363 set_mi_row_col(xd, tile, mi_row, bh, mi_col, bw, cm->mi_rows, cm->mi_cols);
365 vp9_setup_dst_planes(xd, get_frame_new_buffer(cm), mi_row, mi_col);
368 static void set_ref(VP9_COMMON *const cm, MACROBLOCKD *const xd,
369 int idx, int mi_row, int mi_col) {
370 MB_MODE_INFO *const mbmi = &xd->mi_8x8[0]->mbmi;
371 RefBuffer *ref_buffer = &cm->frame_refs[mbmi->ref_frame[idx] - LAST_FRAME];
372 xd->block_refs[idx] = ref_buffer;
373 if (!vp9_is_valid_scale(&ref_buffer->sf))
374 vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,
375 "Invalid scale factors");
376 vp9_setup_pre_planes(xd, idx, ref_buffer->buf, mi_row, mi_col,
378 xd->corrupted |= ref_buffer->buf->corrupted;
381 static void decode_modes_b(VP9_COMMON *const cm, MACROBLOCKD *const xd,
382 const TileInfo *const tile,
383 int mi_row, int mi_col,
384 vp9_reader *r, BLOCK_SIZE bsize) {
385 const int less8x8 = bsize < BLOCK_8X8;
388 set_offsets(cm, xd, tile, bsize, mi_row, mi_col);
389 vp9_read_mode_info(cm, xd, tile, mi_row, mi_col, r);
394 // Has to be called after set_offsets
395 mbmi = &xd->mi_8x8[0]->mbmi;
398 reset_skip_context(xd, bsize);
401 setup_plane_dequants(cm, xd, vp9_get_qindex(&cm->seg, mbmi->segment_id,
405 if (!is_inter_block(mbmi)) {
406 struct intra_args arg = { cm, xd, r };
407 vp9_foreach_transformed_block(xd, bsize,
408 predict_and_reconstruct_intra_block, &arg);
411 set_ref(cm, xd, 0, mi_row, mi_col);
412 if (has_second_ref(mbmi))
413 set_ref(cm, xd, 1, mi_row, mi_col);
415 xd->interp_kernel = vp9_get_interp_kernel(mbmi->interp_filter);
418 vp9_dec_build_inter_predictors_sb(xd, mi_row, mi_col, bsize);
423 struct inter_args arg = { cm, xd, r, &eobtotal };
424 vp9_foreach_transformed_block(xd, bsize, reconstruct_inter_block, &arg);
425 if (!less8x8 && eobtotal == 0)
426 mbmi->skip = 1; // skip loopfilter
430 xd->corrupted |= vp9_reader_has_error(r);
433 static PARTITION_TYPE read_partition(VP9_COMMON *cm, MACROBLOCKD *xd, int hbs,
434 int mi_row, int mi_col, BLOCK_SIZE bsize,
436 const int ctx = partition_plane_context(xd->above_seg_context,
437 xd->left_seg_context,
438 mi_row, mi_col, bsize);
439 const vp9_prob *const probs = get_partition_probs(cm, ctx);
440 const int has_rows = (mi_row + hbs) < cm->mi_rows;
441 const int has_cols = (mi_col + hbs) < cm->mi_cols;
444 if (has_rows && has_cols)
445 p = vp9_read_tree(r, vp9_partition_tree, probs);
446 else if (!has_rows && has_cols)
447 p = vp9_read(r, probs[1]) ? PARTITION_SPLIT : PARTITION_HORZ;
448 else if (has_rows && !has_cols)
449 p = vp9_read(r, probs[2]) ? PARTITION_SPLIT : PARTITION_VERT;
453 if (!cm->frame_parallel_decoding_mode)
454 ++cm->counts.partition[ctx][p];
459 static void decode_modes_sb(VP9_COMMON *const cm, MACROBLOCKD *const xd,
460 const TileInfo *const tile,
461 int mi_row, int mi_col,
462 vp9_reader* r, BLOCK_SIZE bsize) {
463 const int hbs = num_8x8_blocks_wide_lookup[bsize] / 2;
464 PARTITION_TYPE partition;
467 if (mi_row >= cm->mi_rows || mi_col >= cm->mi_cols)
470 partition = read_partition(cm, xd, hbs, mi_row, mi_col, bsize, r);
471 subsize = get_subsize(bsize, partition);
472 if (subsize < BLOCK_8X8) {
473 decode_modes_b(cm, xd, tile, mi_row, mi_col, r, subsize);
477 decode_modes_b(cm, xd, tile, mi_row, mi_col, r, subsize);
480 decode_modes_b(cm, xd, tile, mi_row, mi_col, r, subsize);
481 if (mi_row + hbs < cm->mi_rows)
482 decode_modes_b(cm, xd, tile, mi_row + hbs, mi_col, r, subsize);
485 decode_modes_b(cm, xd, tile, mi_row, mi_col, r, subsize);
486 if (mi_col + hbs < cm->mi_cols)
487 decode_modes_b(cm, xd, tile, mi_row, mi_col + hbs, r, subsize);
489 case PARTITION_SPLIT:
490 decode_modes_sb(cm, xd, tile, mi_row, mi_col, r, subsize);
491 decode_modes_sb(cm, xd, tile, mi_row, mi_col + hbs, r, subsize);
492 decode_modes_sb(cm, xd, tile, mi_row + hbs, mi_col, r, subsize);
493 decode_modes_sb(cm, xd, tile, mi_row + hbs, mi_col + hbs, r, subsize);
496 assert(0 && "Invalid partition type");
500 // update partition context
501 if (bsize >= BLOCK_8X8 &&
502 (bsize == BLOCK_8X8 || partition != PARTITION_SPLIT))
503 update_partition_context(xd->above_seg_context, xd->left_seg_context,
504 mi_row, mi_col, subsize, bsize);
507 static void setup_token_decoder(const uint8_t *data,
508 const uint8_t *data_end,
510 struct vpx_internal_error_info *error_info,
512 // Validate the calculated partition length. If the buffer
513 // described by the partition can't be fully read, then restrict
514 // it to the portion that can be (for EC mode) or throw an error.
515 if (!read_is_valid(data, read_size, data_end))
516 vpx_internal_error(error_info, VPX_CODEC_CORRUPT_FRAME,
517 "Truncated packet or corrupt tile length");
519 if (vp9_reader_init(r, data, read_size))
520 vpx_internal_error(error_info, VPX_CODEC_MEM_ERROR,
521 "Failed to allocate bool decoder %d", 1);
524 static void read_coef_probs_common(vp9_coeff_probs_model *coef_probs,
529 for (i = 0; i < PLANE_TYPES; ++i)
530 for (j = 0; j < REF_TYPES; ++j)
531 for (k = 0; k < COEF_BANDS; ++k)
532 for (l = 0; l < BAND_COEFF_CONTEXTS(k); ++l)
533 for (m = 0; m < UNCONSTRAINED_NODES; ++m)
534 vp9_diff_update_prob(r, &coef_probs[i][j][k][l][m]);
537 static void read_coef_probs(FRAME_CONTEXT *fc, TX_MODE tx_mode,
539 const TX_SIZE max_tx_size = tx_mode_to_biggest_tx_size[tx_mode];
541 for (tx_size = TX_4X4; tx_size <= max_tx_size; ++tx_size)
542 read_coef_probs_common(fc->coef_probs[tx_size], r);
545 static void setup_segmentation(struct segmentation *seg,
546 struct vp9_read_bit_buffer *rb) {
550 seg->update_data = 0;
552 seg->enabled = vp9_rb_read_bit(rb);
556 // Segmentation map update
557 seg->update_map = vp9_rb_read_bit(rb);
558 if (seg->update_map) {
559 for (i = 0; i < SEG_TREE_PROBS; i++)
560 seg->tree_probs[i] = vp9_rb_read_bit(rb) ? vp9_rb_read_literal(rb, 8)
563 seg->temporal_update = vp9_rb_read_bit(rb);
564 if (seg->temporal_update) {
565 for (i = 0; i < PREDICTION_PROBS; i++)
566 seg->pred_probs[i] = vp9_rb_read_bit(rb) ? vp9_rb_read_literal(rb, 8)
569 for (i = 0; i < PREDICTION_PROBS; i++)
570 seg->pred_probs[i] = MAX_PROB;
574 // Segmentation data update
575 seg->update_data = vp9_rb_read_bit(rb);
576 if (seg->update_data) {
577 seg->abs_delta = vp9_rb_read_bit(rb);
579 vp9_clearall_segfeatures(seg);
581 for (i = 0; i < MAX_SEGMENTS; i++) {
582 for (j = 0; j < SEG_LVL_MAX; j++) {
584 const int feature_enabled = vp9_rb_read_bit(rb);
585 if (feature_enabled) {
586 vp9_enable_segfeature(seg, i, j);
587 data = decode_unsigned_max(rb, vp9_seg_feature_data_max(j));
588 if (vp9_is_segfeature_signed(j))
589 data = vp9_rb_read_bit(rb) ? -data : data;
591 vp9_set_segdata(seg, i, j, data);
597 static void setup_loopfilter(struct loopfilter *lf,
598 struct vp9_read_bit_buffer *rb) {
599 lf->filter_level = vp9_rb_read_literal(rb, 6);
600 lf->sharpness_level = vp9_rb_read_literal(rb, 3);
602 // Read in loop filter deltas applied at the MB level based on mode or ref
604 lf->mode_ref_delta_update = 0;
606 lf->mode_ref_delta_enabled = vp9_rb_read_bit(rb);
607 if (lf->mode_ref_delta_enabled) {
608 lf->mode_ref_delta_update = vp9_rb_read_bit(rb);
609 if (lf->mode_ref_delta_update) {
612 for (i = 0; i < MAX_REF_LF_DELTAS; i++)
613 if (vp9_rb_read_bit(rb))
614 lf->ref_deltas[i] = vp9_rb_read_signed_literal(rb, 6);
616 for (i = 0; i < MAX_MODE_LF_DELTAS; i++)
617 if (vp9_rb_read_bit(rb))
618 lf->mode_deltas[i] = vp9_rb_read_signed_literal(rb, 6);
623 static int read_delta_q(struct vp9_read_bit_buffer *rb, int *delta_q) {
624 const int old = *delta_q;
625 *delta_q = vp9_rb_read_bit(rb) ? vp9_rb_read_signed_literal(rb, 4) : 0;
626 return old != *delta_q;
629 static void setup_quantization(VP9_COMMON *const cm, MACROBLOCKD *const xd,
630 struct vp9_read_bit_buffer *rb) {
633 cm->base_qindex = vp9_rb_read_literal(rb, QINDEX_BITS);
634 update |= read_delta_q(rb, &cm->y_dc_delta_q);
635 update |= read_delta_q(rb, &cm->uv_dc_delta_q);
636 update |= read_delta_q(rb, &cm->uv_ac_delta_q);
638 vp9_init_dequantizer(cm);
640 xd->lossless = cm->base_qindex == 0 &&
641 cm->y_dc_delta_q == 0 &&
642 cm->uv_dc_delta_q == 0 &&
643 cm->uv_ac_delta_q == 0;
645 xd->itxm_add = xd->lossless ? vp9_iwht4x4_add : vp9_idct4x4_add;
648 static INTERP_FILTER read_interp_filter(struct vp9_read_bit_buffer *rb) {
649 const INTERP_FILTER literal_to_filter[] = { EIGHTTAP_SMOOTH,
653 return vp9_rb_read_bit(rb) ? SWITCHABLE
654 : literal_to_filter[vp9_rb_read_literal(rb, 2)];
657 static void read_frame_size(struct vp9_read_bit_buffer *rb,
658 int *width, int *height) {
659 const int w = vp9_rb_read_literal(rb, 16) + 1;
660 const int h = vp9_rb_read_literal(rb, 16) + 1;
665 static void setup_display_size(VP9_COMMON *cm, struct vp9_read_bit_buffer *rb) {
666 cm->display_width = cm->width;
667 cm->display_height = cm->height;
668 if (vp9_rb_read_bit(rb))
669 read_frame_size(rb, &cm->display_width, &cm->display_height);
672 static void apply_frame_size(VP9D_COMP *pbi, int width, int height) {
673 VP9_COMMON *cm = &pbi->common;
675 if (cm->width != width || cm->height != height) {
676 // Change in frame size.
677 // TODO(agrange) Don't test width/height, check overall size.
678 if (width > cm->width || height > cm->height) {
679 // Rescale frame buffers only if they're not big enough already.
680 if (vp9_resize_frame_buffers(cm, width, height))
681 vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR,
682 "Failed to allocate frame buffers");
688 vp9_update_frame_size(cm);
691 if (vp9_realloc_frame_buffer(
692 get_frame_new_buffer(cm), cm->width, cm->height,
693 cm->subsampling_x, cm->subsampling_y, VP9_DEC_BORDER_IN_PIXELS,
694 &cm->frame_bufs[cm->new_fb_idx].raw_frame_buffer, cm->get_fb_cb,
696 vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR,
697 "Failed to allocate frame buffer");
701 static void setup_frame_size(VP9D_COMP *pbi,
702 struct vp9_read_bit_buffer *rb) {
704 read_frame_size(rb, &width, &height);
705 apply_frame_size(pbi, width, height);
706 setup_display_size(&pbi->common, rb);
709 static void setup_frame_size_with_refs(VP9D_COMP *pbi,
710 struct vp9_read_bit_buffer *rb) {
711 VP9_COMMON *const cm = &pbi->common;
715 for (i = 0; i < REFS_PER_FRAME; ++i) {
716 if (vp9_rb_read_bit(rb)) {
717 YV12_BUFFER_CONFIG *const buf = cm->frame_refs[i].buf;
718 width = buf->y_crop_width;
719 height = buf->y_crop_height;
726 read_frame_size(rb, &width, &height);
728 if (width <= 0 || height <= 0)
729 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,
730 "Referenced frame with invalid size");
732 apply_frame_size(pbi, width, height);
733 setup_display_size(cm, rb);
736 static void setup_tile_context(VP9D_COMP *const pbi, MACROBLOCKD *const xd,
737 int tile_row, int tile_col) {
739 const int tile_cols = 1 << pbi->common.log2_tile_cols;
740 xd->mi_stream = pbi->mi_streams[tile_row * tile_cols + tile_col];
742 for (i = 0; i < MAX_MB_PLANE; ++i) {
743 xd->above_context[i] = pbi->above_context[i];
745 // see note in alloc_tile_storage().
746 xd->above_seg_context = pbi->above_seg_context;
749 static void decode_tile(VP9D_COMP *pbi, const TileInfo *const tile,
751 const int num_threads = pbi->oxcf.max_threads;
752 VP9_COMMON *const cm = &pbi->common;
754 MACROBLOCKD *xd = &pbi->mb;
756 if (pbi->do_loopfilter_inline) {
757 LFWorkerData *const lf_data = (LFWorkerData*)pbi->lf_worker.data1;
758 lf_data->frame_buffer = get_frame_new_buffer(cm);
760 lf_data->xd = pbi->mb;
763 vp9_loop_filter_frame_init(cm, cm->lf.filter_level);
766 for (mi_row = tile->mi_row_start; mi_row < tile->mi_row_end;
767 mi_row += MI_BLOCK_SIZE) {
768 // For a SB there are 2 left contexts, each pertaining to a MB row within
769 vp9_zero(xd->left_context);
770 vp9_zero(xd->left_seg_context);
771 for (mi_col = tile->mi_col_start; mi_col < tile->mi_col_end;
772 mi_col += MI_BLOCK_SIZE) {
773 decode_modes_sb(cm, xd, tile, mi_row, mi_col, r, BLOCK_64X64);
776 if (pbi->do_loopfilter_inline) {
777 const int lf_start = mi_row - MI_BLOCK_SIZE;
778 LFWorkerData *const lf_data = (LFWorkerData*)pbi->lf_worker.data1;
780 // delay the loopfilter by 1 macroblock row.
781 if (lf_start < 0) continue;
783 // decoding has completed: finish up the loop filter in this thread.
784 if (mi_row + MI_BLOCK_SIZE >= tile->mi_row_end) continue;
786 vp9_worker_sync(&pbi->lf_worker);
787 lf_data->start = lf_start;
788 lf_data->stop = mi_row;
789 if (num_threads > 1) {
790 vp9_worker_launch(&pbi->lf_worker);
792 vp9_worker_execute(&pbi->lf_worker);
797 if (pbi->do_loopfilter_inline) {
798 LFWorkerData *const lf_data = (LFWorkerData*)pbi->lf_worker.data1;
800 vp9_worker_sync(&pbi->lf_worker);
801 lf_data->start = lf_data->stop;
802 lf_data->stop = cm->mi_rows;
803 vp9_worker_execute(&pbi->lf_worker);
807 static void setup_tile_info(VP9_COMMON *cm, struct vp9_read_bit_buffer *rb) {
808 int min_log2_tile_cols, max_log2_tile_cols, max_ones;
809 vp9_get_tile_n_bits(cm->mi_cols, &min_log2_tile_cols, &max_log2_tile_cols);
812 max_ones = max_log2_tile_cols - min_log2_tile_cols;
813 cm->log2_tile_cols = min_log2_tile_cols;
814 while (max_ones-- && vp9_rb_read_bit(rb))
815 cm->log2_tile_cols++;
818 cm->log2_tile_rows = vp9_rb_read_bit(rb);
819 if (cm->log2_tile_rows)
820 cm->log2_tile_rows += vp9_rb_read_bit(rb);
823 // Reads the next tile returning its size and adjusting '*data' accordingly
824 // based on 'is_last'.
825 static size_t get_tile(const uint8_t *const data_end,
827 struct vpx_internal_error_info *error_info,
828 const uint8_t **data) {
832 if (!read_is_valid(*data, 4, data_end))
833 vpx_internal_error(error_info, VPX_CODEC_CORRUPT_FRAME,
834 "Truncated packet or corrupt tile length");
836 size = mem_get_be32(*data);
839 if (size > (size_t)(data_end - *data))
840 vpx_internal_error(error_info, VPX_CODEC_CORRUPT_FRAME,
841 "Truncated packet or corrupt tile size");
843 size = data_end - *data;
848 typedef struct TileBuffer {
851 int col; // only used with multi-threaded decoding
854 static const uint8_t *decode_tiles(VP9D_COMP *pbi, const uint8_t *data) {
855 VP9_COMMON *const cm = &pbi->common;
856 MACROBLOCKD *const xd = &pbi->mb;
857 const int aligned_cols = mi_cols_aligned_to_sb(cm->mi_cols);
858 const int tile_cols = 1 << cm->log2_tile_cols;
859 const int tile_rows = 1 << cm->log2_tile_rows;
860 TileBuffer tile_buffers[4][1 << 6];
861 int tile_row, tile_col;
862 const uint8_t *const data_end = pbi->source + pbi->source_sz;
863 const uint8_t *end = NULL;
866 assert(tile_rows <= 4);
867 assert(tile_cols <= (1 << 6));
869 // Note: this memset assumes above_context[0], [1] and [2]
870 // are allocated as part of the same buffer.
871 vpx_memset(pbi->above_context[0], 0,
872 sizeof(*pbi->above_context[0]) * MAX_MB_PLANE * 2 * aligned_cols);
874 vpx_memset(pbi->above_seg_context, 0,
875 sizeof(*pbi->above_seg_context) * aligned_cols);
877 // Load tile data into tile_buffers
878 for (tile_row = 0; tile_row < tile_rows; ++tile_row) {
879 for (tile_col = 0; tile_col < tile_cols; ++tile_col) {
880 const int last_tile = tile_row == tile_rows - 1 &&
881 tile_col == tile_cols - 1;
882 const size_t size = get_tile(data_end, last_tile, &cm->error, &data);
883 TileBuffer *const buf = &tile_buffers[tile_row][tile_col];
890 // Decode tiles using data from tile_buffers
891 for (tile_row = 0; tile_row < tile_rows; ++tile_row) {
892 for (tile_col = 0; tile_col < tile_cols; ++tile_col) {
893 const int col = pbi->oxcf.inv_tile_order ? tile_cols - tile_col - 1
895 const int last_tile = tile_row == tile_rows - 1 &&
896 col == tile_cols - 1;
897 const TileBuffer *const buf = &tile_buffers[tile_row][col];
900 vp9_tile_init(&tile, cm, tile_row, col);
901 setup_token_decoder(buf->data, data_end, buf->size, &cm->error, &r);
902 setup_tile_context(pbi, xd, tile_row, col);
903 decode_tile(pbi, &tile, &r);
906 end = vp9_reader_find_end(&r);
913 static void setup_tile_macroblockd(TileWorkerData *const tile_data) {
914 MACROBLOCKD *xd = &tile_data->xd;
915 struct macroblockd_plane *const pd = xd->plane;
918 for (i = 0; i < MAX_MB_PLANE; ++i) {
919 pd[i].dqcoeff = tile_data->dqcoeff[i];
920 vpx_memset(xd->plane[i].dqcoeff, 0, 64 * 64 * sizeof(int16_t));
924 static int tile_worker_hook(void *arg1, void *arg2) {
925 TileWorkerData *const tile_data = (TileWorkerData*)arg1;
926 const TileInfo *const tile = (TileInfo*)arg2;
929 for (mi_row = tile->mi_row_start; mi_row < tile->mi_row_end;
930 mi_row += MI_BLOCK_SIZE) {
931 vp9_zero(tile_data->xd.left_context);
932 vp9_zero(tile_data->xd.left_seg_context);
933 for (mi_col = tile->mi_col_start; mi_col < tile->mi_col_end;
934 mi_col += MI_BLOCK_SIZE) {
935 decode_modes_sb(tile_data->cm, &tile_data->xd, tile,
936 mi_row, mi_col, &tile_data->bit_reader, BLOCK_64X64);
939 return !tile_data->xd.corrupted;
942 // sorts in descending order
943 static int compare_tile_buffers(const void *a, const void *b) {
944 const TileBuffer *const buf1 = (const TileBuffer*)a;
945 const TileBuffer *const buf2 = (const TileBuffer*)b;
946 if (buf1->size < buf2->size) {
948 } else if (buf1->size == buf2->size) {
955 static const uint8_t *decode_tiles_mt(VP9D_COMP *pbi, const uint8_t *data) {
956 VP9_COMMON *const cm = &pbi->common;
957 const uint8_t *bit_reader_end = NULL;
958 const uint8_t *const data_end = pbi->source + pbi->source_sz;
959 const int aligned_mi_cols = mi_cols_aligned_to_sb(cm->mi_cols);
960 const int tile_cols = 1 << cm->log2_tile_cols;
961 const int tile_rows = 1 << cm->log2_tile_rows;
962 const int num_workers = MIN(pbi->oxcf.max_threads & ~1, tile_cols);
963 TileBuffer tile_buffers[1 << 6];
965 int final_worker = -1;
967 assert(tile_cols <= (1 << 6));
968 assert(tile_rows == 1);
971 if (num_workers > pbi->num_tile_workers) {
973 CHECK_MEM_ERROR(cm, pbi->tile_workers,
974 vpx_realloc(pbi->tile_workers,
975 num_workers * sizeof(*pbi->tile_workers)));
976 for (i = pbi->num_tile_workers; i < num_workers; ++i) {
977 VP9Worker *const worker = &pbi->tile_workers[i];
978 ++pbi->num_tile_workers;
980 vp9_worker_init(worker);
981 CHECK_MEM_ERROR(cm, worker->data1,
982 vpx_memalign(32, sizeof(TileWorkerData)));
983 CHECK_MEM_ERROR(cm, worker->data2, vpx_malloc(sizeof(TileInfo)));
984 if (i < num_workers - 1 && !vp9_worker_reset(worker)) {
985 vpx_internal_error(&cm->error, VPX_CODEC_ERROR,
986 "Tile decoder thread creation failed");
991 // Reset tile decoding hook
992 for (n = 0; n < pbi->num_tile_workers; ++n) {
993 pbi->tile_workers[n].hook = (VP9WorkerHook)tile_worker_hook;
996 // Note: this memset assumes above_context[0], [1] and [2]
997 // are allocated as part of the same buffer.
998 vpx_memset(pbi->above_context[0], 0,
999 sizeof(*pbi->above_context[0]) * MAX_MB_PLANE *
1000 2 * aligned_mi_cols);
1001 vpx_memset(pbi->above_seg_context, 0,
1002 sizeof(*pbi->above_seg_context) * aligned_mi_cols);
1004 // Load tile data into tile_buffers
1005 for (n = 0; n < tile_cols; ++n) {
1007 get_tile(data_end, n == tile_cols - 1, &cm->error, &data);
1008 TileBuffer *const buf = &tile_buffers[n];
1015 // Sort the buffers based on size in descending order.
1016 qsort(tile_buffers, tile_cols, sizeof(tile_buffers[0]), compare_tile_buffers);
1018 // Rearrange the tile buffers such that per-tile group the largest, and
1019 // presumably the most difficult, tile will be decoded in the main thread.
1020 // This should help minimize the number of instances where the main thread is
1021 // waiting for a worker to complete.
1023 int group_start = 0;
1024 while (group_start < tile_cols) {
1025 const TileBuffer largest = tile_buffers[group_start];
1026 const int group_end = MIN(group_start + num_workers, tile_cols) - 1;
1027 memmove(tile_buffers + group_start, tile_buffers + group_start + 1,
1028 (group_end - group_start) * sizeof(tile_buffers[0]));
1029 tile_buffers[group_end] = largest;
1030 group_start = group_end + 1;
1035 while (n < tile_cols) {
1037 for (i = 0; i < num_workers && n < tile_cols; ++i) {
1038 VP9Worker *const worker = &pbi->tile_workers[i];
1039 TileWorkerData *const tile_data = (TileWorkerData*)worker->data1;
1040 TileInfo *const tile = (TileInfo*)worker->data2;
1041 TileBuffer *const buf = &tile_buffers[n];
1044 tile_data->xd = pbi->mb;
1045 tile_data->xd.corrupted = 0;
1046 vp9_tile_init(tile, tile_data->cm, 0, buf->col);
1048 setup_token_decoder(buf->data, data_end, buf->size, &cm->error,
1049 &tile_data->bit_reader);
1050 setup_tile_context(pbi, &tile_data->xd, 0, buf->col);
1051 setup_tile_macroblockd(tile_data);
1053 worker->had_error = 0;
1054 if (i == num_workers - 1 || n == tile_cols - 1) {
1055 vp9_worker_execute(worker);
1057 vp9_worker_launch(worker);
1060 if (buf->col == tile_cols - 1) {
1067 for (; i > 0; --i) {
1068 VP9Worker *const worker = &pbi->tile_workers[i - 1];
1069 pbi->mb.corrupted |= !vp9_worker_sync(worker);
1071 if (final_worker > -1) {
1072 TileWorkerData *const tile_data =
1073 (TileWorkerData*)pbi->tile_workers[final_worker].data1;
1074 bit_reader_end = vp9_reader_find_end(&tile_data->bit_reader);
1079 return bit_reader_end;
1082 static void check_sync_code(VP9_COMMON *cm, struct vp9_read_bit_buffer *rb) {
1083 if (vp9_rb_read_literal(rb, 8) != VP9_SYNC_CODE_0 ||
1084 vp9_rb_read_literal(rb, 8) != VP9_SYNC_CODE_1 ||
1085 vp9_rb_read_literal(rb, 8) != VP9_SYNC_CODE_2) {
1086 vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,
1087 "Invalid frame sync code");
1091 static void error_handler(void *data) {
1092 VP9_COMMON *const cm = (VP9_COMMON *)data;
1093 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, "Truncated packet");
1097 if (vp9_rb_read_bit(rb)) \
1098 vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM, \
1099 "Reserved bit must be unset")
1101 static size_t read_uncompressed_header(VP9D_COMP *pbi,
1102 struct vp9_read_bit_buffer *rb) {
1103 VP9_COMMON *const cm = &pbi->common;
1107 cm->last_frame_type = cm->frame_type;
1109 if (vp9_rb_read_literal(rb, 2) != VP9_FRAME_MARKER)
1110 vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,
1111 "Invalid frame marker");
1113 cm->version = vp9_rb_read_bit(rb);
1116 cm->show_existing_frame = vp9_rb_read_bit(rb);
1117 if (cm->show_existing_frame) {
1118 // Show an existing frame directly.
1119 const int frame_to_show = cm->ref_frame_map[vp9_rb_read_literal(rb, 3)];
1121 if (cm->frame_bufs[frame_to_show].ref_count < 1)
1122 vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,
1123 "Buffer %d does not contain a decoded frame",
1126 ref_cnt_fb(cm->frame_bufs, &cm->new_fb_idx, frame_to_show);
1127 pbi->refresh_frame_flags = 0;
1128 cm->lf.filter_level = 0;
1133 cm->frame_type = (FRAME_TYPE) vp9_rb_read_bit(rb);
1134 cm->show_frame = vp9_rb_read_bit(rb);
1135 cm->error_resilient_mode = vp9_rb_read_bit(rb);
1137 if (cm->frame_type == KEY_FRAME) {
1138 check_sync_code(cm, rb);
1140 cm->color_space = vp9_rb_read_literal(rb, 3); // colorspace
1141 if (cm->color_space != SRGB) {
1142 vp9_rb_read_bit(rb); // [16,235] (including xvycc) vs [0,255] range
1143 if (cm->version == 1) {
1144 cm->subsampling_x = vp9_rb_read_bit(rb);
1145 cm->subsampling_y = vp9_rb_read_bit(rb);
1146 vp9_rb_read_bit(rb); // has extra plane
1148 cm->subsampling_y = cm->subsampling_x = 1;
1151 if (cm->version == 1) {
1152 cm->subsampling_y = cm->subsampling_x = 0;
1153 vp9_rb_read_bit(rb); // has extra plane
1155 vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,
1156 "RGB not supported in profile 0");
1160 pbi->refresh_frame_flags = (1 << REF_FRAMES) - 1;
1162 for (i = 0; i < REFS_PER_FRAME; ++i) {
1163 cm->frame_refs[i].idx = cm->new_fb_idx;
1164 cm->frame_refs[i].buf = get_frame_new_buffer(cm);
1167 setup_frame_size(pbi, rb);
1169 cm->intra_only = cm->show_frame ? 0 : vp9_rb_read_bit(rb);
1171 cm->reset_frame_context = cm->error_resilient_mode ?
1172 0 : vp9_rb_read_literal(rb, 2);
1174 if (cm->intra_only) {
1175 check_sync_code(cm, rb);
1177 pbi->refresh_frame_flags = vp9_rb_read_literal(rb, REF_FRAMES);
1178 setup_frame_size(pbi, rb);
1180 pbi->refresh_frame_flags = vp9_rb_read_literal(rb, REF_FRAMES);
1182 for (i = 0; i < REFS_PER_FRAME; ++i) {
1183 const int ref = vp9_rb_read_literal(rb, REF_FRAMES_LOG2);
1184 const int idx = cm->ref_frame_map[ref];
1185 cm->frame_refs[i].idx = idx;
1186 cm->frame_refs[i].buf = &cm->frame_bufs[idx].buf;
1187 cm->ref_frame_sign_bias[LAST_FRAME + i] = vp9_rb_read_bit(rb);
1190 setup_frame_size_with_refs(pbi, rb);
1192 cm->allow_high_precision_mv = vp9_rb_read_bit(rb);
1193 cm->interp_filter = read_interp_filter(rb);
1195 for (i = 0; i < REFS_PER_FRAME; ++i) {
1196 RefBuffer *const ref_buf = &cm->frame_refs[i];
1197 vp9_setup_scale_factors_for_frame(&ref_buf->sf,
1198 ref_buf->buf->y_crop_width,
1199 ref_buf->buf->y_crop_height,
1200 cm->width, cm->height);
1201 if (vp9_is_scaled(&ref_buf->sf))
1202 vp9_extend_frame_borders(ref_buf->buf);
1207 if (!cm->error_resilient_mode) {
1208 cm->coding_use_prev_mi = 1;
1209 cm->refresh_frame_context = vp9_rb_read_bit(rb);
1210 cm->frame_parallel_decoding_mode = vp9_rb_read_bit(rb);
1212 cm->coding_use_prev_mi = 0;
1213 cm->refresh_frame_context = 0;
1214 cm->frame_parallel_decoding_mode = 1;
1217 // This flag will be overridden by the call to vp9_setup_past_independence
1218 // below, forcing the use of context 0 for those frame types.
1219 cm->frame_context_idx = vp9_rb_read_literal(rb, FRAME_CONTEXTS_LOG2);
1221 if (frame_is_intra_only(cm) || cm->error_resilient_mode)
1222 vp9_setup_past_independence(cm);
1224 setup_loopfilter(&cm->lf, rb);
1225 setup_quantization(cm, &pbi->mb, rb);
1226 setup_segmentation(&cm->seg, rb);
1228 setup_tile_info(cm, rb);
1229 sz = vp9_rb_read_literal(rb, 16);
1232 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,
1233 "Invalid header size");
1238 static int read_compressed_header(VP9D_COMP *pbi, const uint8_t *data,
1239 size_t partition_size) {
1240 VP9_COMMON *const cm = &pbi->common;
1241 MACROBLOCKD *const xd = &pbi->mb;
1242 FRAME_CONTEXT *const fc = &cm->fc;
1246 if (vp9_reader_init(&r, data, partition_size))
1247 vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR,
1248 "Failed to allocate bool decoder 0");
1250 cm->tx_mode = xd->lossless ? ONLY_4X4 : read_tx_mode(&r);
1251 if (cm->tx_mode == TX_MODE_SELECT)
1252 read_tx_mode_probs(&fc->tx_probs, &r);
1253 read_coef_probs(fc, cm->tx_mode, &r);
1255 for (k = 0; k < SKIP_CONTEXTS; ++k)
1256 vp9_diff_update_prob(&r, &fc->skip_probs[k]);
1258 if (!frame_is_intra_only(cm)) {
1259 nmv_context *const nmvc = &fc->nmvc;
1262 read_inter_mode_probs(fc, &r);
1264 if (cm->interp_filter == SWITCHABLE)
1265 read_switchable_interp_probs(fc, &r);
1267 for (i = 0; i < INTRA_INTER_CONTEXTS; i++)
1268 vp9_diff_update_prob(&r, &fc->intra_inter_prob[i]);
1270 cm->reference_mode = read_frame_reference_mode(cm, &r);
1271 if (cm->reference_mode != SINGLE_REFERENCE)
1272 setup_compound_reference_mode(cm);
1273 read_frame_reference_mode_probs(cm, &r);
1275 for (j = 0; j < BLOCK_SIZE_GROUPS; j++)
1276 for (i = 0; i < INTRA_MODES - 1; ++i)
1277 vp9_diff_update_prob(&r, &fc->y_mode_prob[j][i]);
1279 for (j = 0; j < PARTITION_CONTEXTS; ++j)
1280 for (i = 0; i < PARTITION_TYPES - 1; ++i)
1281 vp9_diff_update_prob(&r, &fc->partition_prob[j][i]);
1283 read_mv_probs(nmvc, cm->allow_high_precision_mv, &r);
1286 return vp9_reader_has_error(&r);
1289 void vp9_init_dequantizer(VP9_COMMON *cm) {
1292 for (q = 0; q < QINDEX_RANGE; q++) {
1293 cm->y_dequant[q][0] = vp9_dc_quant(q, cm->y_dc_delta_q);
1294 cm->y_dequant[q][1] = vp9_ac_quant(q, 0);
1296 cm->uv_dequant[q][0] = vp9_dc_quant(q, cm->uv_dc_delta_q);
1297 cm->uv_dequant[q][1] = vp9_ac_quant(q, cm->uv_ac_delta_q);
1302 #define debug_check_frame_counts(cm) (void)0
1304 // Counts should only be incremented when frame_parallel_decoding_mode and
1305 // error_resilient_mode are disabled.
1306 static void debug_check_frame_counts(const VP9_COMMON *const cm) {
1307 FRAME_COUNTS zero_counts;
1308 vp9_zero(zero_counts);
1309 assert(cm->frame_parallel_decoding_mode || cm->error_resilient_mode);
1310 assert(!memcmp(cm->counts.y_mode, zero_counts.y_mode,
1311 sizeof(cm->counts.y_mode)));
1312 assert(!memcmp(cm->counts.uv_mode, zero_counts.uv_mode,
1313 sizeof(cm->counts.uv_mode)));
1314 assert(!memcmp(cm->counts.partition, zero_counts.partition,
1315 sizeof(cm->counts.partition)));
1316 assert(!memcmp(cm->counts.coef, zero_counts.coef,
1317 sizeof(cm->counts.coef)));
1318 assert(!memcmp(cm->counts.eob_branch, zero_counts.eob_branch,
1319 sizeof(cm->counts.eob_branch)));
1320 assert(!memcmp(cm->counts.switchable_interp, zero_counts.switchable_interp,
1321 sizeof(cm->counts.switchable_interp)));
1322 assert(!memcmp(cm->counts.inter_mode, zero_counts.inter_mode,
1323 sizeof(cm->counts.inter_mode)));
1324 assert(!memcmp(cm->counts.intra_inter, zero_counts.intra_inter,
1325 sizeof(cm->counts.intra_inter)));
1326 assert(!memcmp(cm->counts.comp_inter, zero_counts.comp_inter,
1327 sizeof(cm->counts.comp_inter)));
1328 assert(!memcmp(cm->counts.single_ref, zero_counts.single_ref,
1329 sizeof(cm->counts.single_ref)));
1330 assert(!memcmp(cm->counts.comp_ref, zero_counts.comp_ref,
1331 sizeof(cm->counts.comp_ref)));
1332 assert(!memcmp(&cm->counts.tx, &zero_counts.tx, sizeof(cm->counts.tx)));
1333 assert(!memcmp(cm->counts.skip, zero_counts.skip, sizeof(cm->counts.skip)));
1334 assert(!memcmp(&cm->counts.mv, &zero_counts.mv, sizeof(cm->counts.mv)));
1338 int vp9_decode_frame(VP9D_COMP *pbi, const uint8_t **p_data_end) {
1340 VP9_COMMON *const cm = &pbi->common;
1341 MACROBLOCKD *const xd = &pbi->mb;
1343 const uint8_t *data = pbi->source;
1344 const uint8_t *const data_end = pbi->source + pbi->source_sz;
1346 struct vp9_read_bit_buffer rb = { data, data_end, 0, cm, error_handler };
1347 const size_t first_partition_size = read_uncompressed_header(pbi, &rb);
1348 const int keyframe = cm->frame_type == KEY_FRAME;
1349 const int tile_rows = 1 << cm->log2_tile_rows;
1350 const int tile_cols = 1 << cm->log2_tile_cols;
1351 YV12_BUFFER_CONFIG *const new_fb = get_frame_new_buffer(cm);
1352 xd->cur_buf = new_fb;
1354 if (!first_partition_size) {
1355 // showing a frame directly
1356 *p_data_end = data + 1;
1360 if (!pbi->decoded_key_frame && !keyframe)
1363 data += vp9_rb_bytes_read(&rb);
1364 if (!read_is_valid(data, first_partition_size, data_end))
1365 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,
1366 "Truncated packet or corrupt header length");
1368 pbi->do_loopfilter_inline =
1369 (cm->log2_tile_rows | cm->log2_tile_cols) == 0 && cm->lf.filter_level;
1370 if (pbi->do_loopfilter_inline && pbi->lf_worker.data1 == NULL) {
1371 CHECK_MEM_ERROR(cm, pbi->lf_worker.data1, vpx_malloc(sizeof(LFWorkerData)));
1372 pbi->lf_worker.hook = (VP9WorkerHook)vp9_loop_filter_worker;
1373 if (pbi->oxcf.max_threads > 1 && !vp9_worker_reset(&pbi->lf_worker)) {
1374 vpx_internal_error(&cm->error, VPX_CODEC_ERROR,
1375 "Loop filter thread creation failed");
1379 alloc_tile_storage(pbi, tile_rows, tile_cols);
1381 xd->mode_info_stride = cm->mode_info_stride;
1382 if (cm->coding_use_prev_mi)
1387 setup_plane_dequants(cm, xd, cm->base_qindex);
1388 vp9_setup_block_planes(xd, cm->subsampling_x, cm->subsampling_y);
1390 cm->fc = cm->frame_contexts[cm->frame_context_idx];
1391 vp9_zero(cm->counts);
1392 for (i = 0; i < MAX_MB_PLANE; ++i)
1393 vpx_memset(xd->plane[i].dqcoeff, 0, 64 * 64 * sizeof(int16_t));
1396 new_fb->corrupted = read_compressed_header(pbi, data, first_partition_size);
1398 // TODO(jzern): remove frame_parallel_decoding_mode restriction for
1399 // single-frame tile decoding.
1400 if (pbi->oxcf.max_threads > 1 && tile_rows == 1 && tile_cols > 1 &&
1401 cm->frame_parallel_decoding_mode) {
1402 *p_data_end = decode_tiles_mt(pbi, data + first_partition_size);
1404 *p_data_end = decode_tiles(pbi, data + first_partition_size);
1407 new_fb->corrupted |= xd->corrupted;
1409 if (!pbi->decoded_key_frame) {
1410 if (keyframe && !new_fb->corrupted)
1411 pbi->decoded_key_frame = 1;
1413 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,
1414 "A stream must start with a complete key frame");
1417 if (!cm->error_resilient_mode && !cm->frame_parallel_decoding_mode) {
1418 vp9_adapt_coef_probs(cm);
1420 if (!frame_is_intra_only(cm)) {
1421 vp9_adapt_mode_probs(cm);
1422 vp9_adapt_mv_probs(cm, cm->allow_high_precision_mv);
1425 debug_check_frame_counts(cm);
1428 if (cm->refresh_frame_context)
1429 cm->frame_contexts[cm->frame_context_idx] = cm->fc;