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_thread.h"
32 #include "vp9/common/vp9_tile_common.h"
34 #include "vp9/decoder/vp9_decodeframe.h"
35 #include "vp9/decoder/vp9_detokenize.h"
36 #include "vp9/decoder/vp9_decodemv.h"
37 #include "vp9/decoder/vp9_decoder.h"
38 #include "vp9/decoder/vp9_dsubexp.h"
39 #include "vp9/decoder/vp9_dthread.h"
40 #include "vp9/decoder/vp9_read_bit_buffer.h"
41 #include "vp9/decoder/vp9_reader.h"
43 #define MAX_VP9_HEADER_SIZE 80
45 static int is_compound_reference_allowed(const VP9_COMMON *cm) {
47 for (i = 1; i < REFS_PER_FRAME; ++i)
48 if (cm->ref_frame_sign_bias[i + 1] != cm->ref_frame_sign_bias[1])
54 static void setup_compound_reference_mode(VP9_COMMON *cm) {
55 if (cm->ref_frame_sign_bias[LAST_FRAME] ==
56 cm->ref_frame_sign_bias[GOLDEN_FRAME]) {
57 cm->comp_fixed_ref = ALTREF_FRAME;
58 cm->comp_var_ref[0] = LAST_FRAME;
59 cm->comp_var_ref[1] = GOLDEN_FRAME;
60 } else if (cm->ref_frame_sign_bias[LAST_FRAME] ==
61 cm->ref_frame_sign_bias[ALTREF_FRAME]) {
62 cm->comp_fixed_ref = GOLDEN_FRAME;
63 cm->comp_var_ref[0] = LAST_FRAME;
64 cm->comp_var_ref[1] = ALTREF_FRAME;
66 cm->comp_fixed_ref = LAST_FRAME;
67 cm->comp_var_ref[0] = GOLDEN_FRAME;
68 cm->comp_var_ref[1] = ALTREF_FRAME;
72 static int read_is_valid(const uint8_t *start, size_t len, const uint8_t *end) {
73 return len != 0 && len <= (size_t)(end - start);
76 static int decode_unsigned_max(struct vp9_read_bit_buffer *rb, int max) {
77 const int data = vp9_rb_read_literal(rb, get_unsigned_bits(max));
78 return data > max ? max : data;
81 static TX_MODE read_tx_mode(vp9_reader *r) {
82 TX_MODE tx_mode = vp9_read_literal(r, 2);
83 if (tx_mode == ALLOW_32X32)
84 tx_mode += vp9_read_bit(r);
88 static void read_tx_mode_probs(struct tx_probs *tx_probs, vp9_reader *r) {
91 for (i = 0; i < TX_SIZE_CONTEXTS; ++i)
92 for (j = 0; j < TX_SIZES - 3; ++j)
93 vp9_diff_update_prob(r, &tx_probs->p8x8[i][j]);
95 for (i = 0; i < TX_SIZE_CONTEXTS; ++i)
96 for (j = 0; j < TX_SIZES - 2; ++j)
97 vp9_diff_update_prob(r, &tx_probs->p16x16[i][j]);
99 for (i = 0; i < TX_SIZE_CONTEXTS; ++i)
100 for (j = 0; j < TX_SIZES - 1; ++j)
101 vp9_diff_update_prob(r, &tx_probs->p32x32[i][j]);
104 static void read_switchable_interp_probs(FRAME_CONTEXT *fc, vp9_reader *r) {
106 for (j = 0; j < SWITCHABLE_FILTER_CONTEXTS; ++j)
107 for (i = 0; i < SWITCHABLE_FILTERS - 1; ++i)
108 vp9_diff_update_prob(r, &fc->switchable_interp_prob[j][i]);
111 static void read_inter_mode_probs(FRAME_CONTEXT *fc, vp9_reader *r) {
113 for (i = 0; i < INTER_MODE_CONTEXTS; ++i)
114 for (j = 0; j < INTER_MODES - 1; ++j)
115 vp9_diff_update_prob(r, &fc->inter_mode_probs[i][j]);
118 static REFERENCE_MODE read_frame_reference_mode(const VP9_COMMON *cm,
120 if (is_compound_reference_allowed(cm)) {
121 return vp9_read_bit(r) ? (vp9_read_bit(r) ? REFERENCE_MODE_SELECT
122 : COMPOUND_REFERENCE)
125 return SINGLE_REFERENCE;
129 static void read_frame_reference_mode_probs(VP9_COMMON *cm, vp9_reader *r) {
130 FRAME_CONTEXT *const fc = &cm->fc;
133 if (cm->reference_mode == REFERENCE_MODE_SELECT)
134 for (i = 0; i < COMP_INTER_CONTEXTS; ++i)
135 vp9_diff_update_prob(r, &fc->comp_inter_prob[i]);
137 if (cm->reference_mode != COMPOUND_REFERENCE)
138 for (i = 0; i < REF_CONTEXTS; ++i) {
139 vp9_diff_update_prob(r, &fc->single_ref_prob[i][0]);
140 vp9_diff_update_prob(r, &fc->single_ref_prob[i][1]);
143 if (cm->reference_mode != SINGLE_REFERENCE)
144 for (i = 0; i < REF_CONTEXTS; ++i)
145 vp9_diff_update_prob(r, &fc->comp_ref_prob[i]);
148 static void update_mv_probs(vp9_prob *p, int n, vp9_reader *r) {
150 for (i = 0; i < n; ++i)
151 if (vp9_read(r, MV_UPDATE_PROB))
152 p[i] = (vp9_read_literal(r, 7) << 1) | 1;
155 static void read_mv_probs(nmv_context *ctx, int allow_hp, vp9_reader *r) {
158 update_mv_probs(ctx->joints, MV_JOINTS - 1, r);
160 for (i = 0; i < 2; ++i) {
161 nmv_component *const comp_ctx = &ctx->comps[i];
162 update_mv_probs(&comp_ctx->sign, 1, r);
163 update_mv_probs(comp_ctx->classes, MV_CLASSES - 1, r);
164 update_mv_probs(comp_ctx->class0, CLASS0_SIZE - 1, r);
165 update_mv_probs(comp_ctx->bits, MV_OFFSET_BITS, r);
168 for (i = 0; i < 2; ++i) {
169 nmv_component *const comp_ctx = &ctx->comps[i];
170 for (j = 0; j < CLASS0_SIZE; ++j)
171 update_mv_probs(comp_ctx->class0_fp[j], MV_FP_SIZE - 1, r);
172 update_mv_probs(comp_ctx->fp, 3, r);
176 for (i = 0; i < 2; ++i) {
177 nmv_component *const comp_ctx = &ctx->comps[i];
178 update_mv_probs(&comp_ctx->class0_hp, 1, r);
179 update_mv_probs(&comp_ctx->hp, 1, r);
184 static void setup_plane_dequants(VP9_COMMON *cm, MACROBLOCKD *xd, int q_index) {
186 xd->plane[0].dequant = cm->y_dequant[q_index];
188 for (i = 1; i < MAX_MB_PLANE; i++)
189 xd->plane[i].dequant = cm->uv_dequant[q_index];
192 static void inverse_transform_block(MACROBLOCKD* xd, int plane, int block,
193 TX_SIZE tx_size, uint8_t *dst, int stride,
195 struct macroblockd_plane *const pd = &xd->plane[plane];
197 TX_TYPE tx_type = DCT_DCT;
198 int16_t *const dqcoeff = BLOCK_OFFSET(pd->dqcoeff, block);
201 vp9_iwht4x4_add(dqcoeff, dst, stride, eob);
203 const PLANE_TYPE plane_type = pd->plane_type;
206 tx_type = get_tx_type_4x4(plane_type, xd, block);
207 vp9_iht4x4_add(tx_type, dqcoeff, dst, stride, eob);
210 tx_type = get_tx_type(plane_type, xd);
211 vp9_iht8x8_add(tx_type, dqcoeff, dst, stride, eob);
214 tx_type = get_tx_type(plane_type, xd);
215 vp9_iht16x16_add(tx_type, dqcoeff, dst, stride, eob);
219 vp9_idct32x32_add(dqcoeff, dst, stride, eob);
222 assert(0 && "Invalid transform size");
227 vpx_memset(dqcoeff, 0, 2 * sizeof(dqcoeff[0]));
229 if (tx_type == DCT_DCT && tx_size <= TX_16X16 && eob <= 10)
230 vpx_memset(dqcoeff, 0, 4 * (4 << tx_size) * sizeof(dqcoeff[0]));
231 else if (tx_size == TX_32X32 && eob <= 34)
232 vpx_memset(dqcoeff, 0, 256 * sizeof(dqcoeff[0]));
234 vpx_memset(dqcoeff, 0, (16 << (tx_size << 1)) * sizeof(dqcoeff[0]));
245 static void predict_and_reconstruct_intra_block(int plane, int block,
246 BLOCK_SIZE plane_bsize,
247 TX_SIZE tx_size, void *arg) {
248 struct intra_args *const args = (struct intra_args *)arg;
249 VP9_COMMON *const cm = args->cm;
250 MACROBLOCKD *const xd = args->xd;
251 struct macroblockd_plane *const pd = &xd->plane[plane];
252 MODE_INFO *const mi = xd->mi[0];
253 const PREDICTION_MODE mode = (plane == 0) ? get_y_mode(mi, block)
257 txfrm_block_to_raster_xy(plane_bsize, tx_size, block, &x, &y);
258 dst = &pd->dst.buf[4 * y * pd->dst.stride + 4 * x];
260 vp9_predict_intra_block(xd, block >> (tx_size << 1),
261 b_width_log2(plane_bsize), tx_size, mode,
262 dst, pd->dst.stride, dst, pd->dst.stride,
265 if (!mi->mbmi.skip) {
266 const int eob = vp9_decode_block_tokens(cm, xd, plane, block,
267 plane_bsize, x, y, tx_size,
269 inverse_transform_block(xd, plane, block, tx_size, dst, pd->dst.stride,
281 static void reconstruct_inter_block(int plane, int block,
282 BLOCK_SIZE plane_bsize,
283 TX_SIZE tx_size, void *arg) {
284 struct inter_args *args = (struct inter_args *)arg;
285 VP9_COMMON *const cm = args->cm;
286 MACROBLOCKD *const xd = args->xd;
287 struct macroblockd_plane *const pd = &xd->plane[plane];
289 txfrm_block_to_raster_xy(plane_bsize, tx_size, block, &x, &y);
290 eob = vp9_decode_block_tokens(cm, xd, plane, block, plane_bsize, x, y,
292 inverse_transform_block(xd, plane, block, tx_size,
293 &pd->dst.buf[4 * y * pd->dst.stride + 4 * x],
294 pd->dst.stride, eob);
295 *args->eobtotal += eob;
298 static MB_MODE_INFO *set_offsets(VP9_COMMON *const cm, MACROBLOCKD *const xd,
299 const TileInfo *const tile,
300 BLOCK_SIZE bsize, int mi_row, int mi_col) {
301 const int bw = num_8x8_blocks_wide_lookup[bsize];
302 const int bh = num_8x8_blocks_high_lookup[bsize];
303 const int x_mis = MIN(bw, cm->mi_cols - mi_col);
304 const int y_mis = MIN(bh, cm->mi_rows - mi_row);
305 const int offset = mi_row * cm->mi_stride + mi_col;
308 xd->mi = cm->mi_grid_visible + offset;
309 xd->mi[0] = &cm->mi[offset];
310 xd->mi[0]->mbmi.sb_type = bsize;
311 for (y = 0; y < y_mis; ++y)
312 for (x = !y; x < x_mis; ++x)
313 xd->mi[y * cm->mi_stride + x] = xd->mi[0];
315 set_skip_context(xd, mi_row, mi_col);
317 // Distance of Mb to the various image edges. These are specified to 8th pel
318 // as they are always compared to values that are in 1/8th pel units
319 set_mi_row_col(xd, tile, mi_row, bh, mi_col, bw, cm->mi_rows, cm->mi_cols);
321 vp9_setup_dst_planes(xd->plane, get_frame_new_buffer(cm), mi_row, mi_col);
322 return &xd->mi[0]->mbmi;
325 static void set_ref(VP9_COMMON *const cm, MACROBLOCKD *const xd,
326 int idx, int mi_row, int mi_col) {
327 MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
328 RefBuffer *ref_buffer = &cm->frame_refs[mbmi->ref_frame[idx] - LAST_FRAME];
329 xd->block_refs[idx] = ref_buffer;
330 if (!vp9_is_valid_scale(&ref_buffer->sf))
331 vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,
332 "Invalid scale factors");
333 vp9_setup_pre_planes(xd, idx, ref_buffer->buf, mi_row, mi_col,
335 xd->corrupted |= ref_buffer->buf->corrupted;
338 static void decode_block(VP9_COMMON *const cm, MACROBLOCKD *const xd,
339 const TileInfo *const tile,
340 int mi_row, int mi_col,
341 vp9_reader *r, BLOCK_SIZE bsize) {
342 const int less8x8 = bsize < BLOCK_8X8;
343 MB_MODE_INFO *mbmi = set_offsets(cm, xd, tile, bsize, mi_row, mi_col);
344 vp9_read_mode_info(cm, xd, tile, mi_row, mi_col, r);
350 reset_skip_context(xd, bsize);
353 setup_plane_dequants(cm, xd, vp9_get_qindex(&cm->seg, mbmi->segment_id,
357 if (!is_inter_block(mbmi)) {
358 struct intra_args arg = { cm, xd, r };
359 vp9_foreach_transformed_block(xd, bsize,
360 predict_and_reconstruct_intra_block, &arg);
363 set_ref(cm, xd, 0, mi_row, mi_col);
364 if (has_second_ref(mbmi))
365 set_ref(cm, xd, 1, mi_row, mi_col);
368 vp9_dec_build_inter_predictors_sb(xd, mi_row, mi_col, bsize);
373 struct inter_args arg = { cm, xd, r, &eobtotal };
374 vp9_foreach_transformed_block(xd, bsize, reconstruct_inter_block, &arg);
375 if (!less8x8 && eobtotal == 0)
376 mbmi->skip = 1; // skip loopfilter
380 xd->corrupted |= vp9_reader_has_error(r);
383 static PARTITION_TYPE read_partition(VP9_COMMON *cm, MACROBLOCKD *xd, int hbs,
384 int mi_row, int mi_col, BLOCK_SIZE bsize,
386 const int ctx = partition_plane_context(xd, mi_row, mi_col, bsize);
387 const vp9_prob *const probs = get_partition_probs(cm, ctx);
388 const int has_rows = (mi_row + hbs) < cm->mi_rows;
389 const int has_cols = (mi_col + hbs) < cm->mi_cols;
392 if (has_rows && has_cols)
393 p = (PARTITION_TYPE)vp9_read_tree(r, vp9_partition_tree, probs);
394 else if (!has_rows && has_cols)
395 p = vp9_read(r, probs[1]) ? PARTITION_SPLIT : PARTITION_HORZ;
396 else if (has_rows && !has_cols)
397 p = vp9_read(r, probs[2]) ? PARTITION_SPLIT : PARTITION_VERT;
401 if (!cm->frame_parallel_decoding_mode)
402 ++cm->counts.partition[ctx][p];
407 static void decode_partition(VP9_COMMON *const cm, MACROBLOCKD *const xd,
408 const TileInfo *const tile,
409 int mi_row, int mi_col,
410 vp9_reader* r, BLOCK_SIZE bsize) {
411 const int hbs = num_8x8_blocks_wide_lookup[bsize] / 2;
412 PARTITION_TYPE partition;
413 BLOCK_SIZE subsize, uv_subsize;
415 if (mi_row >= cm->mi_rows || mi_col >= cm->mi_cols)
418 partition = read_partition(cm, xd, hbs, mi_row, mi_col, bsize, r);
419 subsize = get_subsize(bsize, partition);
420 uv_subsize = ss_size_lookup[subsize][cm->subsampling_x][cm->subsampling_y];
421 if (subsize >= BLOCK_8X8 && uv_subsize == BLOCK_INVALID)
422 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,
423 "Invalid block size.");
424 if (subsize < BLOCK_8X8) {
425 decode_block(cm, xd, tile, mi_row, mi_col, r, subsize);
429 decode_block(cm, xd, tile, mi_row, mi_col, r, subsize);
432 decode_block(cm, xd, tile, mi_row, mi_col, r, subsize);
433 if (mi_row + hbs < cm->mi_rows)
434 decode_block(cm, xd, tile, mi_row + hbs, mi_col, r, subsize);
437 decode_block(cm, xd, tile, mi_row, mi_col, r, subsize);
438 if (mi_col + hbs < cm->mi_cols)
439 decode_block(cm, xd, tile, mi_row, mi_col + hbs, r, subsize);
441 case PARTITION_SPLIT:
442 decode_partition(cm, xd, tile, mi_row, mi_col, r, subsize);
443 decode_partition(cm, xd, tile, mi_row, mi_col + hbs, r, subsize);
444 decode_partition(cm, xd, tile, mi_row + hbs, mi_col, r, subsize);
445 decode_partition(cm, xd, tile, mi_row + hbs, mi_col + hbs, r, subsize);
448 assert(0 && "Invalid partition type");
452 // update partition context
453 if (bsize >= BLOCK_8X8 &&
454 (bsize == BLOCK_8X8 || partition != PARTITION_SPLIT))
455 update_partition_context(xd, mi_row, mi_col, subsize, bsize);
458 static void setup_token_decoder(const uint8_t *data,
459 const uint8_t *data_end,
461 struct vpx_internal_error_info *error_info,
463 vpx_decrypt_cb decrypt_cb,
464 void *decrypt_state) {
465 // Validate the calculated partition length. If the buffer
466 // described by the partition can't be fully read, then restrict
467 // it to the portion that can be (for EC mode) or throw an error.
468 if (!read_is_valid(data, read_size, data_end))
469 vpx_internal_error(error_info, VPX_CODEC_CORRUPT_FRAME,
470 "Truncated packet or corrupt tile length");
472 if (vp9_reader_init(r, data, read_size, decrypt_cb, decrypt_state))
473 vpx_internal_error(error_info, VPX_CODEC_MEM_ERROR,
474 "Failed to allocate bool decoder %d", 1);
477 static void read_coef_probs_common(vp9_coeff_probs_model *coef_probs,
482 for (i = 0; i < PLANE_TYPES; ++i)
483 for (j = 0; j < REF_TYPES; ++j)
484 for (k = 0; k < COEF_BANDS; ++k)
485 for (l = 0; l < BAND_COEFF_CONTEXTS(k); ++l)
486 for (m = 0; m < UNCONSTRAINED_NODES; ++m)
487 vp9_diff_update_prob(r, &coef_probs[i][j][k][l][m]);
490 static void read_coef_probs(FRAME_CONTEXT *fc, TX_MODE tx_mode,
492 const TX_SIZE max_tx_size = tx_mode_to_biggest_tx_size[tx_mode];
494 for (tx_size = TX_4X4; tx_size <= max_tx_size; ++tx_size)
495 read_coef_probs_common(fc->coef_probs[tx_size], r);
498 static void setup_segmentation(struct segmentation *seg,
499 struct vp9_read_bit_buffer *rb) {
503 seg->update_data = 0;
505 seg->enabled = vp9_rb_read_bit(rb);
509 // Segmentation map update
510 seg->update_map = vp9_rb_read_bit(rb);
511 if (seg->update_map) {
512 for (i = 0; i < SEG_TREE_PROBS; i++)
513 seg->tree_probs[i] = vp9_rb_read_bit(rb) ? vp9_rb_read_literal(rb, 8)
516 seg->temporal_update = vp9_rb_read_bit(rb);
517 if (seg->temporal_update) {
518 for (i = 0; i < PREDICTION_PROBS; i++)
519 seg->pred_probs[i] = vp9_rb_read_bit(rb) ? vp9_rb_read_literal(rb, 8)
522 for (i = 0; i < PREDICTION_PROBS; i++)
523 seg->pred_probs[i] = MAX_PROB;
527 // Segmentation data update
528 seg->update_data = vp9_rb_read_bit(rb);
529 if (seg->update_data) {
530 seg->abs_delta = vp9_rb_read_bit(rb);
532 vp9_clearall_segfeatures(seg);
534 for (i = 0; i < MAX_SEGMENTS; i++) {
535 for (j = 0; j < SEG_LVL_MAX; j++) {
537 const int feature_enabled = vp9_rb_read_bit(rb);
538 if (feature_enabled) {
539 vp9_enable_segfeature(seg, i, j);
540 data = decode_unsigned_max(rb, vp9_seg_feature_data_max(j));
541 if (vp9_is_segfeature_signed(j))
542 data = vp9_rb_read_bit(rb) ? -data : data;
544 vp9_set_segdata(seg, i, j, data);
550 static void setup_loopfilter(struct loopfilter *lf,
551 struct vp9_read_bit_buffer *rb) {
552 lf->filter_level = vp9_rb_read_literal(rb, 6);
553 lf->sharpness_level = vp9_rb_read_literal(rb, 3);
555 // Read in loop filter deltas applied at the MB level based on mode or ref
557 lf->mode_ref_delta_update = 0;
559 lf->mode_ref_delta_enabled = vp9_rb_read_bit(rb);
560 if (lf->mode_ref_delta_enabled) {
561 lf->mode_ref_delta_update = vp9_rb_read_bit(rb);
562 if (lf->mode_ref_delta_update) {
565 for (i = 0; i < MAX_REF_LF_DELTAS; i++)
566 if (vp9_rb_read_bit(rb))
567 lf->ref_deltas[i] = vp9_rb_read_signed_literal(rb, 6);
569 for (i = 0; i < MAX_MODE_LF_DELTAS; i++)
570 if (vp9_rb_read_bit(rb))
571 lf->mode_deltas[i] = vp9_rb_read_signed_literal(rb, 6);
576 static int read_delta_q(struct vp9_read_bit_buffer *rb, int *delta_q) {
577 const int old = *delta_q;
578 *delta_q = vp9_rb_read_bit(rb) ? vp9_rb_read_signed_literal(rb, 4) : 0;
579 return old != *delta_q;
582 static void setup_quantization(VP9_COMMON *const cm, MACROBLOCKD *const xd,
583 struct vp9_read_bit_buffer *rb) {
586 cm->base_qindex = vp9_rb_read_literal(rb, QINDEX_BITS);
587 update |= read_delta_q(rb, &cm->y_dc_delta_q);
588 update |= read_delta_q(rb, &cm->uv_dc_delta_q);
589 update |= read_delta_q(rb, &cm->uv_ac_delta_q);
591 vp9_init_dequantizer(cm);
593 xd->lossless = cm->base_qindex == 0 &&
594 cm->y_dc_delta_q == 0 &&
595 cm->uv_dc_delta_q == 0 &&
596 cm->uv_ac_delta_q == 0;
599 static INTERP_FILTER read_interp_filter(struct vp9_read_bit_buffer *rb) {
600 const INTERP_FILTER literal_to_filter[] = { EIGHTTAP_SMOOTH,
604 return vp9_rb_read_bit(rb) ? SWITCHABLE
605 : literal_to_filter[vp9_rb_read_literal(rb, 2)];
608 void vp9_read_frame_size(struct vp9_read_bit_buffer *rb,
609 int *width, int *height) {
610 const int w = vp9_rb_read_literal(rb, 16) + 1;
611 const int h = vp9_rb_read_literal(rb, 16) + 1;
616 static void setup_display_size(VP9_COMMON *cm, struct vp9_read_bit_buffer *rb) {
617 cm->display_width = cm->width;
618 cm->display_height = cm->height;
619 if (vp9_rb_read_bit(rb))
620 vp9_read_frame_size(rb, &cm->display_width, &cm->display_height);
623 static void resize_context_buffers(VP9_COMMON *cm, int width, int height) {
624 #if CONFIG_SIZE_LIMIT
625 if (width > DECODE_WIDTH_LIMIT || height > DECODE_HEIGHT_LIMIT)
626 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,
627 "Width and height beyond allowed size.");
629 if (cm->width != width || cm->height != height) {
630 // Change in frame size (assumption: color format does not change).
631 if (cm->width == 0 || cm->height == 0 ||
632 width * height > cm->width * cm->height) {
633 if (vp9_alloc_context_buffers(cm, width, height))
634 vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR,
635 "Failed to allocate frame buffers");
637 vp9_set_mb_mi(cm, width, height);
639 vp9_init_context_buffers(cm);
645 static void setup_frame_size(VP9_COMMON *cm, struct vp9_read_bit_buffer *rb) {
647 vp9_read_frame_size(rb, &width, &height);
648 resize_context_buffers(cm, width, height);
649 setup_display_size(cm, rb);
651 if (vp9_realloc_frame_buffer(
652 get_frame_new_buffer(cm), cm->width, cm->height,
653 cm->subsampling_x, cm->subsampling_y, VP9_DEC_BORDER_IN_PIXELS,
654 &cm->frame_bufs[cm->new_fb_idx].raw_frame_buffer, cm->get_fb_cb,
656 vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR,
657 "Failed to allocate frame buffer");
661 static void setup_frame_size_with_refs(VP9_COMMON *cm,
662 struct vp9_read_bit_buffer *rb) {
665 for (i = 0; i < REFS_PER_FRAME; ++i) {
666 if (vp9_rb_read_bit(rb)) {
667 YV12_BUFFER_CONFIG *const buf = cm->frame_refs[i].buf;
668 width = buf->y_crop_width;
669 height = buf->y_crop_height;
676 vp9_read_frame_size(rb, &width, &height);
678 // Check that each of the frames that this frame references has valid
680 for (i = 0; i < REFS_PER_FRAME; ++i) {
681 RefBuffer *const ref_frame = &cm->frame_refs[i];
682 if (!valid_ref_frame_size(ref_frame->buf->y_width, ref_frame->buf->y_height,
684 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,
685 "Referenced frame has invalid size");
688 resize_context_buffers(cm, width, height);
689 setup_display_size(cm, rb);
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_tile_info(VP9_COMMON *cm, struct vp9_read_bit_buffer *rb) {
702 int min_log2_tile_cols, max_log2_tile_cols, max_ones;
703 vp9_get_tile_n_bits(cm->mi_cols, &min_log2_tile_cols, &max_log2_tile_cols);
706 max_ones = max_log2_tile_cols - min_log2_tile_cols;
707 cm->log2_tile_cols = min_log2_tile_cols;
708 while (max_ones-- && vp9_rb_read_bit(rb))
709 cm->log2_tile_cols++;
711 if (cm->log2_tile_cols > 6)
712 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,
713 "Invalid number of tile columns");
716 cm->log2_tile_rows = vp9_rb_read_bit(rb);
717 if (cm->log2_tile_rows)
718 cm->log2_tile_rows += vp9_rb_read_bit(rb);
721 typedef struct TileBuffer {
724 int col; // only used with multi-threaded decoding
727 // Reads the next tile returning its size and adjusting '*data' accordingly
728 // based on 'is_last'.
729 static void get_tile_buffer(const uint8_t *const data_end,
731 struct vpx_internal_error_info *error_info,
732 const uint8_t **data,
733 vpx_decrypt_cb decrypt_cb, void *decrypt_state,
738 if (!read_is_valid(*data, 4, data_end))
739 vpx_internal_error(error_info, VPX_CODEC_CORRUPT_FRAME,
740 "Truncated packet or corrupt tile length");
744 decrypt_cb(decrypt_state, *data, be_data, 4);
745 size = mem_get_be32(be_data);
747 size = mem_get_be32(*data);
751 if (size > (size_t)(data_end - *data))
752 vpx_internal_error(error_info, VPX_CODEC_CORRUPT_FRAME,
753 "Truncated packet or corrupt tile size");
755 size = data_end - *data;
764 static void get_tile_buffers(VP9Decoder *pbi,
765 const uint8_t *data, const uint8_t *data_end,
766 int tile_cols, int tile_rows,
767 TileBuffer (*tile_buffers)[1 << 6]) {
770 for (r = 0; r < tile_rows; ++r) {
771 for (c = 0; c < tile_cols; ++c) {
772 const int is_last = (r == tile_rows - 1) && (c == tile_cols - 1);
773 TileBuffer *const buf = &tile_buffers[r][c];
775 get_tile_buffer(data_end, is_last, &pbi->common.error, &data,
776 pbi->decrypt_cb, pbi->decrypt_state, buf);
781 static const uint8_t *decode_tiles(VP9Decoder *pbi,
783 const uint8_t *data_end) {
784 VP9_COMMON *const cm = &pbi->common;
785 const VP9WorkerInterface *const winterface = vp9_get_worker_interface();
786 const int aligned_cols = mi_cols_aligned_to_sb(cm->mi_cols);
787 const int tile_cols = 1 << cm->log2_tile_cols;
788 const int tile_rows = 1 << cm->log2_tile_rows;
789 TileBuffer tile_buffers[4][1 << 6];
790 int tile_row, tile_col;
792 TileData *tile_data = NULL;
794 if (cm->lf.filter_level && pbi->lf_worker.data1 == NULL) {
795 CHECK_MEM_ERROR(cm, pbi->lf_worker.data1,
796 vpx_memalign(32, sizeof(LFWorkerData)));
797 pbi->lf_worker.hook = (VP9WorkerHook)vp9_loop_filter_worker;
798 if (pbi->max_threads > 1 && !winterface->reset(&pbi->lf_worker)) {
799 vpx_internal_error(&cm->error, VPX_CODEC_ERROR,
800 "Loop filter thread creation failed");
804 if (cm->lf.filter_level) {
805 LFWorkerData *const lf_data = (LFWorkerData*)pbi->lf_worker.data1;
806 lf_data->frame_buffer = get_frame_new_buffer(cm);
808 vp9_copy(lf_data->planes, pbi->mb.plane);
811 vp9_loop_filter_frame_init(cm, cm->lf.filter_level);
814 assert(tile_rows <= 4);
815 assert(tile_cols <= (1 << 6));
817 // Note: this memset assumes above_context[0], [1] and [2]
818 // are allocated as part of the same buffer.
819 vpx_memset(cm->above_context, 0,
820 sizeof(*cm->above_context) * MAX_MB_PLANE * 2 * aligned_cols);
822 vpx_memset(cm->above_seg_context, 0,
823 sizeof(*cm->above_seg_context) * aligned_cols);
825 get_tile_buffers(pbi, data, data_end, tile_cols, tile_rows, tile_buffers);
827 if (pbi->tile_data == NULL ||
828 (tile_cols * tile_rows) != pbi->total_tiles) {
829 vpx_free(pbi->tile_data);
833 vpx_memalign(32, tile_cols * tile_rows * (sizeof(*pbi->tile_data))));
834 pbi->total_tiles = tile_rows * tile_cols;
837 // Load all tile information into tile_data.
838 for (tile_row = 0; tile_row < tile_rows; ++tile_row) {
839 for (tile_col = 0; tile_col < tile_cols; ++tile_col) {
841 const TileBuffer *const buf = &tile_buffers[tile_row][tile_col];
842 tile_data = pbi->tile_data + tile_cols * tile_row + tile_col;
844 tile_data->xd = pbi->mb;
845 tile_data->xd.corrupted = 0;
846 vp9_tile_init(&tile, tile_data->cm, tile_row, tile_col);
847 setup_token_decoder(buf->data, data_end, buf->size, &cm->error,
848 &tile_data->bit_reader, pbi->decrypt_cb,
850 init_macroblockd(cm, &tile_data->xd);
851 vp9_zero(tile_data->xd.dqcoeff);
855 for (tile_row = 0; tile_row < tile_rows; ++tile_row) {
857 vp9_tile_set_row(&tile, cm, tile_row);
858 for (mi_row = tile.mi_row_start; mi_row < tile.mi_row_end;
859 mi_row += MI_BLOCK_SIZE) {
860 for (tile_col = 0; tile_col < tile_cols; ++tile_col) {
861 const int col = pbi->inv_tile_order ?
862 tile_cols - tile_col - 1 : tile_col;
863 tile_data = pbi->tile_data + tile_cols * tile_row + col;
864 vp9_tile_set_col(&tile, tile_data->cm, col);
865 vp9_zero(tile_data->xd.left_context);
866 vp9_zero(tile_data->xd.left_seg_context);
867 for (mi_col = tile.mi_col_start; mi_col < tile.mi_col_end;
868 mi_col += MI_BLOCK_SIZE) {
869 decode_partition(tile_data->cm, &tile_data->xd, &tile, mi_row, mi_col,
870 &tile_data->bit_reader, BLOCK_64X64);
872 pbi->mb.corrupted |= tile_data->xd.corrupted;
874 // Loopfilter one row.
875 if (cm->lf.filter_level) {
876 const int lf_start = mi_row - MI_BLOCK_SIZE;
877 LFWorkerData *const lf_data = (LFWorkerData*)pbi->lf_worker.data1;
879 // delay the loopfilter by 1 macroblock row.
880 if (lf_start < 0) continue;
882 // decoding has completed: finish up the loop filter in this thread.
883 if (mi_row + MI_BLOCK_SIZE >= cm->mi_rows) continue;
885 winterface->sync(&pbi->lf_worker);
886 lf_data->start = lf_start;
887 lf_data->stop = mi_row;
888 if (pbi->max_threads > 1) {
889 winterface->launch(&pbi->lf_worker);
891 winterface->execute(&pbi->lf_worker);
897 // Loopfilter remaining rows in the frame.
898 if (cm->lf.filter_level) {
899 LFWorkerData *const lf_data = (LFWorkerData*)pbi->lf_worker.data1;
900 winterface->sync(&pbi->lf_worker);
901 lf_data->start = lf_data->stop;
902 lf_data->stop = cm->mi_rows;
903 winterface->execute(&pbi->lf_worker);
906 // Get last tile data.
907 tile_data = pbi->tile_data + tile_cols * tile_rows - 1;
909 return vp9_reader_find_end(&tile_data->bit_reader);
912 static int tile_worker_hook(void *arg1, void *arg2) {
913 TileWorkerData *const tile_data = (TileWorkerData*)arg1;
914 const TileInfo *const tile = (TileInfo*)arg2;
917 for (mi_row = tile->mi_row_start; mi_row < tile->mi_row_end;
918 mi_row += MI_BLOCK_SIZE) {
919 vp9_zero(tile_data->xd.left_context);
920 vp9_zero(tile_data->xd.left_seg_context);
921 for (mi_col = tile->mi_col_start; mi_col < tile->mi_col_end;
922 mi_col += MI_BLOCK_SIZE) {
923 decode_partition(tile_data->cm, &tile_data->xd, tile,
924 mi_row, mi_col, &tile_data->bit_reader, BLOCK_64X64);
927 return !tile_data->xd.corrupted;
930 // sorts in descending order
931 static int compare_tile_buffers(const void *a, const void *b) {
932 const TileBuffer *const buf1 = (const TileBuffer*)a;
933 const TileBuffer *const buf2 = (const TileBuffer*)b;
934 if (buf1->size < buf2->size) {
936 } else if (buf1->size == buf2->size) {
943 static const uint8_t *decode_tiles_mt(VP9Decoder *pbi,
945 const uint8_t *data_end) {
946 VP9_COMMON *const cm = &pbi->common;
947 const VP9WorkerInterface *const winterface = vp9_get_worker_interface();
948 const uint8_t *bit_reader_end = NULL;
949 const int aligned_mi_cols = mi_cols_aligned_to_sb(cm->mi_cols);
950 const int tile_cols = 1 << cm->log2_tile_cols;
951 const int tile_rows = 1 << cm->log2_tile_rows;
952 const int num_workers = MIN(pbi->max_threads & ~1, tile_cols);
953 TileBuffer tile_buffers[1][1 << 6];
955 int final_worker = -1;
957 assert(tile_cols <= (1 << 6));
958 assert(tile_rows == 1);
961 // TODO(jzern): See if we can remove the restriction of passing in max
962 // threads to the decoder.
963 if (pbi->num_tile_workers == 0) {
964 const int num_threads = pbi->max_threads & ~1;
966 // TODO(jzern): Allocate one less worker, as in the current code we only
967 // use num_threads - 1 workers.
968 CHECK_MEM_ERROR(cm, pbi->tile_workers,
969 vpx_malloc(num_threads * sizeof(*pbi->tile_workers)));
970 for (i = 0; i < num_threads; ++i) {
971 VP9Worker *const worker = &pbi->tile_workers[i];
972 ++pbi->num_tile_workers;
974 winterface->init(worker);
975 CHECK_MEM_ERROR(cm, worker->data1,
976 vpx_memalign(32, sizeof(TileWorkerData)));
977 CHECK_MEM_ERROR(cm, worker->data2, vpx_malloc(sizeof(TileInfo)));
978 if (i < num_threads - 1 && !winterface->reset(worker)) {
979 vpx_internal_error(&cm->error, VPX_CODEC_ERROR,
980 "Tile decoder thread creation failed");
985 // Reset tile decoding hook
986 for (n = 0; n < num_workers; ++n) {
987 pbi->tile_workers[n].hook = (VP9WorkerHook)tile_worker_hook;
990 // Note: this memset assumes above_context[0], [1] and [2]
991 // are allocated as part of the same buffer.
992 vpx_memset(cm->above_context, 0,
993 sizeof(*cm->above_context) * MAX_MB_PLANE * 2 * aligned_mi_cols);
994 vpx_memset(cm->above_seg_context, 0,
995 sizeof(*cm->above_seg_context) * aligned_mi_cols);
997 // Load tile data into tile_buffers
998 get_tile_buffers(pbi, data, data_end, tile_cols, tile_rows, tile_buffers);
1000 // Sort the buffers based on size in descending order.
1001 qsort(tile_buffers[0], tile_cols, sizeof(tile_buffers[0][0]),
1002 compare_tile_buffers);
1004 // Rearrange the tile buffers such that per-tile group the largest, and
1005 // presumably the most difficult, tile will be decoded in the main thread.
1006 // This should help minimize the number of instances where the main thread is
1007 // waiting for a worker to complete.
1009 int group_start = 0;
1010 while (group_start < tile_cols) {
1011 const TileBuffer largest = tile_buffers[0][group_start];
1012 const int group_end = MIN(group_start + num_workers, tile_cols) - 1;
1013 memmove(tile_buffers[0] + group_start, tile_buffers[0] + group_start + 1,
1014 (group_end - group_start) * sizeof(tile_buffers[0][0]));
1015 tile_buffers[0][group_end] = largest;
1016 group_start = group_end + 1;
1021 while (n < tile_cols) {
1023 for (i = 0; i < num_workers && n < tile_cols; ++i) {
1024 VP9Worker *const worker = &pbi->tile_workers[i];
1025 TileWorkerData *const tile_data = (TileWorkerData*)worker->data1;
1026 TileInfo *const tile = (TileInfo*)worker->data2;
1027 TileBuffer *const buf = &tile_buffers[0][n];
1030 tile_data->xd = pbi->mb;
1031 tile_data->xd.corrupted = 0;
1032 vp9_tile_init(tile, tile_data->cm, 0, buf->col);
1033 setup_token_decoder(buf->data, data_end, buf->size, &cm->error,
1034 &tile_data->bit_reader, pbi->decrypt_cb,
1035 pbi->decrypt_state);
1036 init_macroblockd(cm, &tile_data->xd);
1037 vp9_zero(tile_data->xd.dqcoeff);
1039 worker->had_error = 0;
1040 if (i == num_workers - 1 || n == tile_cols - 1) {
1041 winterface->execute(worker);
1043 winterface->launch(worker);
1046 if (buf->col == tile_cols - 1) {
1053 for (; i > 0; --i) {
1054 VP9Worker *const worker = &pbi->tile_workers[i - 1];
1055 pbi->mb.corrupted |= !winterface->sync(worker);
1057 if (final_worker > -1) {
1058 TileWorkerData *const tile_data =
1059 (TileWorkerData*)pbi->tile_workers[final_worker].data1;
1060 bit_reader_end = vp9_reader_find_end(&tile_data->bit_reader);
1065 return bit_reader_end;
1068 static void error_handler(void *data) {
1069 VP9_COMMON *const cm = (VP9_COMMON *)data;
1070 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, "Truncated packet");
1073 int vp9_read_sync_code(struct vp9_read_bit_buffer *const rb) {
1074 return vp9_rb_read_literal(rb, 8) == VP9_SYNC_CODE_0 &&
1075 vp9_rb_read_literal(rb, 8) == VP9_SYNC_CODE_1 &&
1076 vp9_rb_read_literal(rb, 8) == VP9_SYNC_CODE_2;
1079 BITSTREAM_PROFILE vp9_read_profile(struct vp9_read_bit_buffer *rb) {
1080 int profile = vp9_rb_read_bit(rb);
1081 profile |= vp9_rb_read_bit(rb) << 1;
1083 profile += vp9_rb_read_bit(rb);
1084 return (BITSTREAM_PROFILE) profile;
1087 static size_t read_uncompressed_header(VP9Decoder *pbi,
1088 struct vp9_read_bit_buffer *rb) {
1089 VP9_COMMON *const cm = &pbi->common;
1093 cm->last_frame_type = cm->frame_type;
1095 if (vp9_rb_read_literal(rb, 2) != VP9_FRAME_MARKER)
1096 vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,
1097 "Invalid frame marker");
1099 cm->profile = vp9_read_profile(rb);
1100 if (cm->profile >= MAX_PROFILES)
1101 vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,
1102 "Unsupported bitstream profile");
1104 cm->show_existing_frame = vp9_rb_read_bit(rb);
1105 if (cm->show_existing_frame) {
1106 // Show an existing frame directly.
1107 const int frame_to_show = cm->ref_frame_map[vp9_rb_read_literal(rb, 3)];
1109 if (frame_to_show < 0 || cm->frame_bufs[frame_to_show].ref_count < 1)
1110 vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,
1111 "Buffer %d does not contain a decoded frame",
1114 ref_cnt_fb(cm->frame_bufs, &cm->new_fb_idx, frame_to_show);
1115 pbi->refresh_frame_flags = 0;
1116 cm->lf.filter_level = 0;
1121 cm->frame_type = (FRAME_TYPE) vp9_rb_read_bit(rb);
1122 cm->show_frame = vp9_rb_read_bit(rb);
1123 cm->error_resilient_mode = vp9_rb_read_bit(rb);
1125 if (cm->frame_type == KEY_FRAME) {
1126 if (!vp9_read_sync_code(rb))
1127 vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,
1128 "Invalid frame sync code");
1129 if (cm->profile > PROFILE_1)
1130 cm->bit_depth = vp9_rb_read_bit(rb) ? BITS_12 : BITS_10;
1131 cm->color_space = (COLOR_SPACE)vp9_rb_read_literal(rb, 3);
1132 if (cm->color_space != SRGB) {
1133 vp9_rb_read_bit(rb); // [16,235] (including xvycc) vs [0,255] range
1134 if (cm->profile == PROFILE_1 || cm->profile == PROFILE_3) {
1135 cm->subsampling_x = vp9_rb_read_bit(rb);
1136 cm->subsampling_y = vp9_rb_read_bit(rb);
1137 if (vp9_rb_read_bit(rb))
1138 vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,
1139 "Reserved bit set");
1141 cm->subsampling_y = cm->subsampling_x = 1;
1144 if (cm->profile == PROFILE_1 || cm->profile == PROFILE_3) {
1145 cm->subsampling_y = cm->subsampling_x = 0;
1146 if (vp9_rb_read_bit(rb))
1147 vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,
1148 "Reserved bit set");
1150 vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,
1151 "4:4:4 color not supported in profile 0");
1155 pbi->refresh_frame_flags = (1 << REF_FRAMES) - 1;
1157 for (i = 0; i < REFS_PER_FRAME; ++i) {
1158 cm->frame_refs[i].idx = -1;
1159 cm->frame_refs[i].buf = NULL;
1162 setup_frame_size(cm, rb);
1164 cm->intra_only = cm->show_frame ? 0 : vp9_rb_read_bit(rb);
1166 cm->reset_frame_context = cm->error_resilient_mode ?
1167 0 : vp9_rb_read_literal(rb, 2);
1169 if (cm->intra_only) {
1170 if (!vp9_read_sync_code(rb))
1171 vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,
1172 "Invalid frame sync code");
1174 pbi->refresh_frame_flags = vp9_rb_read_literal(rb, REF_FRAMES);
1176 // NOTE: The intra-only frame header does not include the specification of
1177 // either the color format or color sub-sampling. VP9 specifies that the
1178 // default color space should be YUV 4:2:0 in this case (normative).
1179 cm->color_space = BT_601;
1180 cm->subsampling_y = cm->subsampling_x = 1;
1182 setup_frame_size(cm, rb);
1184 pbi->refresh_frame_flags = vp9_rb_read_literal(rb, REF_FRAMES);
1185 for (i = 0; i < REFS_PER_FRAME; ++i) {
1186 const int ref = vp9_rb_read_literal(rb, REF_FRAMES_LOG2);
1187 const int idx = cm->ref_frame_map[ref];
1188 RefBuffer *const ref_frame = &cm->frame_refs[i];
1189 ref_frame->idx = idx;
1190 ref_frame->buf = &cm->frame_bufs[idx].buf;
1191 cm->ref_frame_sign_bias[LAST_FRAME + i] = vp9_rb_read_bit(rb);
1194 setup_frame_size_with_refs(cm, rb);
1196 cm->allow_high_precision_mv = vp9_rb_read_bit(rb);
1197 cm->interp_filter = read_interp_filter(rb);
1199 for (i = 0; i < REFS_PER_FRAME; ++i) {
1200 RefBuffer *const ref_buf = &cm->frame_refs[i];
1201 vp9_setup_scale_factors_for_frame(&ref_buf->sf,
1202 ref_buf->buf->y_crop_width,
1203 ref_buf->buf->y_crop_height,
1204 cm->width, cm->height);
1205 if (vp9_is_scaled(&ref_buf->sf))
1206 vp9_extend_frame_borders(ref_buf->buf);
1211 if (!cm->error_resilient_mode) {
1212 cm->coding_use_prev_mi = 1;
1213 cm->refresh_frame_context = vp9_rb_read_bit(rb);
1214 cm->frame_parallel_decoding_mode = vp9_rb_read_bit(rb);
1216 cm->coding_use_prev_mi = 0;
1217 cm->refresh_frame_context = 0;
1218 cm->frame_parallel_decoding_mode = 1;
1221 // This flag will be overridden by the call to vp9_setup_past_independence
1222 // below, forcing the use of context 0 for those frame types.
1223 cm->frame_context_idx = vp9_rb_read_literal(rb, FRAME_CONTEXTS_LOG2);
1225 if (frame_is_intra_only(cm) || cm->error_resilient_mode)
1226 vp9_setup_past_independence(cm);
1228 setup_loopfilter(&cm->lf, rb);
1229 setup_quantization(cm, &pbi->mb, rb);
1230 setup_segmentation(&cm->seg, rb);
1232 setup_tile_info(cm, rb);
1233 sz = vp9_rb_read_literal(rb, 16);
1236 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,
1237 "Invalid header size");
1242 static int read_compressed_header(VP9Decoder *pbi, const uint8_t *data,
1243 size_t partition_size) {
1244 VP9_COMMON *const cm = &pbi->common;
1245 MACROBLOCKD *const xd = &pbi->mb;
1246 FRAME_CONTEXT *const fc = &cm->fc;
1250 if (vp9_reader_init(&r, data, partition_size, pbi->decrypt_cb,
1251 pbi->decrypt_state))
1252 vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR,
1253 "Failed to allocate bool decoder 0");
1255 cm->tx_mode = xd->lossless ? ONLY_4X4 : read_tx_mode(&r);
1256 if (cm->tx_mode == TX_MODE_SELECT)
1257 read_tx_mode_probs(&fc->tx_probs, &r);
1258 read_coef_probs(fc, cm->tx_mode, &r);
1260 for (k = 0; k < SKIP_CONTEXTS; ++k)
1261 vp9_diff_update_prob(&r, &fc->skip_probs[k]);
1263 if (!frame_is_intra_only(cm)) {
1264 nmv_context *const nmvc = &fc->nmvc;
1267 read_inter_mode_probs(fc, &r);
1269 if (cm->interp_filter == SWITCHABLE)
1270 read_switchable_interp_probs(fc, &r);
1272 for (i = 0; i < INTRA_INTER_CONTEXTS; i++)
1273 vp9_diff_update_prob(&r, &fc->intra_inter_prob[i]);
1275 cm->reference_mode = read_frame_reference_mode(cm, &r);
1276 if (cm->reference_mode != SINGLE_REFERENCE)
1277 setup_compound_reference_mode(cm);
1278 read_frame_reference_mode_probs(cm, &r);
1280 for (j = 0; j < BLOCK_SIZE_GROUPS; j++)
1281 for (i = 0; i < INTRA_MODES - 1; ++i)
1282 vp9_diff_update_prob(&r, &fc->y_mode_prob[j][i]);
1284 for (j = 0; j < PARTITION_CONTEXTS; ++j)
1285 for (i = 0; i < PARTITION_TYPES - 1; ++i)
1286 vp9_diff_update_prob(&r, &fc->partition_prob[j][i]);
1288 read_mv_probs(nmvc, cm->allow_high_precision_mv, &r);
1291 return vp9_reader_has_error(&r);
1294 void vp9_init_dequantizer(VP9_COMMON *cm) {
1297 for (q = 0; q < QINDEX_RANGE; q++) {
1298 cm->y_dequant[q][0] = vp9_dc_quant(q, cm->y_dc_delta_q);
1299 cm->y_dequant[q][1] = vp9_ac_quant(q, 0);
1301 cm->uv_dequant[q][0] = vp9_dc_quant(q, cm->uv_dc_delta_q);
1302 cm->uv_dequant[q][1] = vp9_ac_quant(q, cm->uv_ac_delta_q);
1307 #define debug_check_frame_counts(cm) (void)0
1309 // Counts should only be incremented when frame_parallel_decoding_mode and
1310 // error_resilient_mode are disabled.
1311 static void debug_check_frame_counts(const VP9_COMMON *const cm) {
1312 FRAME_COUNTS zero_counts;
1313 vp9_zero(zero_counts);
1314 assert(cm->frame_parallel_decoding_mode || cm->error_resilient_mode);
1315 assert(!memcmp(cm->counts.y_mode, zero_counts.y_mode,
1316 sizeof(cm->counts.y_mode)));
1317 assert(!memcmp(cm->counts.uv_mode, zero_counts.uv_mode,
1318 sizeof(cm->counts.uv_mode)));
1319 assert(!memcmp(cm->counts.partition, zero_counts.partition,
1320 sizeof(cm->counts.partition)));
1321 assert(!memcmp(cm->counts.coef, zero_counts.coef,
1322 sizeof(cm->counts.coef)));
1323 assert(!memcmp(cm->counts.eob_branch, zero_counts.eob_branch,
1324 sizeof(cm->counts.eob_branch)));
1325 assert(!memcmp(cm->counts.switchable_interp, zero_counts.switchable_interp,
1326 sizeof(cm->counts.switchable_interp)));
1327 assert(!memcmp(cm->counts.inter_mode, zero_counts.inter_mode,
1328 sizeof(cm->counts.inter_mode)));
1329 assert(!memcmp(cm->counts.intra_inter, zero_counts.intra_inter,
1330 sizeof(cm->counts.intra_inter)));
1331 assert(!memcmp(cm->counts.comp_inter, zero_counts.comp_inter,
1332 sizeof(cm->counts.comp_inter)));
1333 assert(!memcmp(cm->counts.single_ref, zero_counts.single_ref,
1334 sizeof(cm->counts.single_ref)));
1335 assert(!memcmp(cm->counts.comp_ref, zero_counts.comp_ref,
1336 sizeof(cm->counts.comp_ref)));
1337 assert(!memcmp(&cm->counts.tx, &zero_counts.tx, sizeof(cm->counts.tx)));
1338 assert(!memcmp(cm->counts.skip, zero_counts.skip, sizeof(cm->counts.skip)));
1339 assert(!memcmp(&cm->counts.mv, &zero_counts.mv, sizeof(cm->counts.mv)));
1343 static struct vp9_read_bit_buffer* init_read_bit_buffer(
1345 struct vp9_read_bit_buffer *rb,
1346 const uint8_t *data,
1347 const uint8_t *data_end,
1348 uint8_t *clear_data /* buffer size MAX_VP9_HEADER_SIZE */) {
1350 rb->error_handler = error_handler;
1351 rb->error_handler_data = &pbi->common;
1352 if (pbi->decrypt_cb) {
1353 const int n = (int)MIN(MAX_VP9_HEADER_SIZE, data_end - data);
1354 pbi->decrypt_cb(pbi->decrypt_state, data, clear_data, n);
1355 rb->bit_buffer = clear_data;
1356 rb->bit_buffer_end = clear_data + n;
1358 rb->bit_buffer = data;
1359 rb->bit_buffer_end = data_end;
1364 void vp9_decode_frame(VP9Decoder *pbi,
1365 const uint8_t *data, const uint8_t *data_end,
1366 const uint8_t **p_data_end) {
1367 VP9_COMMON *const cm = &pbi->common;
1368 MACROBLOCKD *const xd = &pbi->mb;
1369 struct vp9_read_bit_buffer rb = { NULL, NULL, 0, NULL, 0};
1371 uint8_t clear_data[MAX_VP9_HEADER_SIZE];
1372 const size_t first_partition_size = read_uncompressed_header(pbi,
1373 init_read_bit_buffer(pbi, &rb, data, data_end, clear_data));
1374 const int tile_rows = 1 << cm->log2_tile_rows;
1375 const int tile_cols = 1 << cm->log2_tile_cols;
1376 YV12_BUFFER_CONFIG *const new_fb = get_frame_new_buffer(cm);
1377 xd->cur_buf = new_fb;
1379 if (!first_partition_size) {
1380 // showing a frame directly
1381 *p_data_end = data + 1;
1385 data += vp9_rb_bytes_read(&rb);
1386 if (!read_is_valid(data, first_partition_size, data_end))
1387 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,
1388 "Truncated packet or corrupt header length");
1390 init_macroblockd(cm, &pbi->mb);
1392 if (cm->coding_use_prev_mi)
1397 setup_plane_dequants(cm, xd, cm->base_qindex);
1398 vp9_setup_block_planes(xd, cm->subsampling_x, cm->subsampling_y);
1400 cm->fc = cm->frame_contexts[cm->frame_context_idx];
1401 vp9_zero(cm->counts);
1402 vp9_zero(xd->dqcoeff);
1405 new_fb->corrupted = read_compressed_header(pbi, data, first_partition_size);
1407 // TODO(jzern): remove frame_parallel_decoding_mode restriction for
1408 // single-frame tile decoding.
1409 if (pbi->max_threads > 1 && tile_rows == 1 && tile_cols > 1 &&
1410 cm->frame_parallel_decoding_mode) {
1411 *p_data_end = decode_tiles_mt(pbi, data + first_partition_size, data_end);
1412 // If multiple threads are used to decode tiles, then we use those threads
1413 // to do parallel loopfiltering.
1414 vp9_loop_filter_frame_mt(new_fb, pbi, cm, cm->lf.filter_level, 0);
1416 *p_data_end = decode_tiles(pbi, data + first_partition_size, data_end);
1419 new_fb->corrupted |= xd->corrupted;
1421 if (!new_fb->corrupted) {
1422 if (!cm->error_resilient_mode && !cm->frame_parallel_decoding_mode) {
1423 vp9_adapt_coef_probs(cm);
1425 if (!frame_is_intra_only(cm)) {
1426 vp9_adapt_mode_probs(cm);
1427 vp9_adapt_mv_probs(cm, cm->allow_high_precision_mv);
1430 debug_check_frame_counts(cm);
1433 vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,
1434 "Decode failed. Frame data is corrupted.");
1437 if (cm->refresh_frame_context)
1438 cm->frame_contexts[cm->frame_context_idx] = cm->fc;