2 * H.26L/H.264/AVC/JVT/14496-10/... decoder
3 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * H.264 / AVC / MPEG4 part10 codec.
25 * @author Michael Niedermayer <michaelni@gmx.at>
28 #define UNCHECKED_BITSTREAM_READER 1
30 #include "libavutil/avassert.h"
31 #include "libavutil/display.h"
32 #include "libavutil/imgutils.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/stereo3d.h"
35 #include "libavutil/timer.h"
38 #include "cabac_functions.h"
39 #include "error_resilience.h"
43 #include "h264chroma.h"
44 #include "h264_mvpred.h"
48 #include "mpegutils.h"
49 #include "rectangle.h"
52 #include "vdpau_internal.h"
54 const uint16_t ff_h264_mb_sizes[4] = { 256, 384, 512, 768 };
56 int avpriv_h264_has_num_reorder_frames(AVCodecContext *avctx)
58 H264Context *h = avctx->priv_data;
59 return h ? h->sps.num_reorder_frames : 0;
62 static void h264_er_decode_mb(void *opaque, int ref, int mv_dir, int mv_type,
64 int mb_x, int mb_y, int mb_intra, int mb_skipped)
66 H264Context *h = opaque;
67 H264SliceContext *sl = &h->slice_ctx[0];
71 h->mb_xy = mb_x + mb_y * h->mb_stride;
72 memset(sl->non_zero_count_cache, 0, sizeof(sl->non_zero_count_cache));
74 /* FIXME: It is possible albeit uncommon that slice references
75 * differ between slices. We take the easy approach and ignore
76 * it for now. If this turns out to have any relevance in
77 * practice then correct remapping should be added. */
78 if (ref >= sl->ref_count[0])
80 if (!sl->ref_list[0][ref].f.data[0]) {
81 av_log(h->avctx, AV_LOG_DEBUG, "Reference not available for error concealing\n");
84 if ((sl->ref_list[0][ref].reference&3) != 3) {
85 av_log(h->avctx, AV_LOG_DEBUG, "Reference invalid\n");
88 fill_rectangle(&h->cur_pic.ref_index[0][4 * h->mb_xy],
90 fill_rectangle(&sl->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
91 fill_rectangle(sl->mv_cache[0][scan8[0]], 4, 4, 8,
92 pack16to32((*mv)[0][0][0], (*mv)[0][0][1]), 4);
94 h->mb_field_decoding_flag = 0;
95 ff_h264_hl_decode_mb(h, &h->slice_ctx[0]);
98 void ff_h264_draw_horiz_band(H264Context *h, H264SliceContext *sl,
101 AVCodecContext *avctx = h->avctx;
102 AVFrame *cur = &h->cur_pic.f;
103 AVFrame *last = sl->ref_list[0][0].f.data[0] ? &sl->ref_list[0][0].f : NULL;
104 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
105 int vshift = desc->log2_chroma_h;
106 const int field_pic = h->picture_structure != PICT_FRAME;
112 height = FFMIN(height, avctx->height - y);
114 if (field_pic && h->first_field && !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD))
117 if (avctx->draw_horiz_band) {
119 int offset[AV_NUM_DATA_POINTERS];
122 if (cur->pict_type == AV_PICTURE_TYPE_B || h->low_delay ||
123 (avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
130 offset[0] = y * src->linesize[0];
132 offset[2] = (y >> vshift) * src->linesize[1];
133 for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
138 avctx->draw_horiz_band(avctx, src, offset,
139 y, h->picture_structure, height);
144 * Check if the top & left blocks are available if needed and
145 * change the dc mode so it only uses the available blocks.
147 int ff_h264_check_intra4x4_pred_mode(H264Context *h, H264SliceContext *sl)
149 static const int8_t top[12] = {
150 -1, 0, LEFT_DC_PRED, -1, -1, -1, -1, -1, 0
152 static const int8_t left[12] = {
153 0, -1, TOP_DC_PRED, 0, -1, -1, -1, 0, -1, DC_128_PRED
157 if (!(sl->top_samples_available & 0x8000)) {
158 for (i = 0; i < 4; i++) {
159 int status = top[sl->intra4x4_pred_mode_cache[scan8[0] + i]];
161 av_log(h->avctx, AV_LOG_ERROR,
162 "top block unavailable for requested intra4x4 mode %d at %d %d\n",
163 status, h->mb_x, h->mb_y);
164 return AVERROR_INVALIDDATA;
166 sl->intra4x4_pred_mode_cache[scan8[0] + i] = status;
171 if ((sl->left_samples_available & 0x8888) != 0x8888) {
172 static const int mask[4] = { 0x8000, 0x2000, 0x80, 0x20 };
173 for (i = 0; i < 4; i++)
174 if (!(sl->left_samples_available & mask[i])) {
175 int status = left[sl->intra4x4_pred_mode_cache[scan8[0] + 8 * i]];
177 av_log(h->avctx, AV_LOG_ERROR,
178 "left block unavailable for requested intra4x4 mode %d at %d %d\n",
179 status, h->mb_x, h->mb_y);
180 return AVERROR_INVALIDDATA;
182 sl->intra4x4_pred_mode_cache[scan8[0] + 8 * i] = status;
188 } // FIXME cleanup like ff_h264_check_intra_pred_mode
191 * Check if the top & left blocks are available if needed and
192 * change the dc mode so it only uses the available blocks.
194 int ff_h264_check_intra_pred_mode(H264Context *h, H264SliceContext *sl,
195 int mode, int is_chroma)
197 static const int8_t top[4] = { LEFT_DC_PRED8x8, 1, -1, -1 };
198 static const int8_t left[5] = { TOP_DC_PRED8x8, -1, 2, -1, DC_128_PRED8x8 };
201 av_log(h->avctx, AV_LOG_ERROR,
202 "out of range intra chroma pred mode at %d %d\n",
204 return AVERROR_INVALIDDATA;
207 if (!(sl->top_samples_available & 0x8000)) {
210 av_log(h->avctx, AV_LOG_ERROR,
211 "top block unavailable for requested intra mode at %d %d\n",
213 return AVERROR_INVALIDDATA;
217 if ((sl->left_samples_available & 0x8080) != 0x8080) {
220 av_log(h->avctx, AV_LOG_ERROR,
221 "left block unavailable for requested intra mode at %d %d\n",
223 return AVERROR_INVALIDDATA;
225 if (is_chroma && (sl->left_samples_available & 0x8080)) {
226 // mad cow disease mode, aka MBAFF + constrained_intra_pred
227 mode = ALZHEIMER_DC_L0T_PRED8x8 +
228 (!(sl->left_samples_available & 0x8000)) +
229 2 * (mode == DC_128_PRED8x8);
236 const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src,
237 int *dst_length, int *consumed, int length)
243 // src[0]&0x80; // forbidden bit
244 h->nal_ref_idc = src[0] >> 5;
245 h->nal_unit_type = src[0] & 0x1F;
250 #define STARTCODE_TEST \
251 if (i + 2 < length && src[i + 1] == 0 && src[i + 2] <= 3) { \
252 if (src[i + 2] != 3 && src[i + 2] != 0) { \
253 /* startcode, so we must be past the end */ \
259 #if HAVE_FAST_UNALIGNED
260 #define FIND_FIRST_ZERO \
261 if (i > 0 && !src[i]) \
267 for (i = 0; i + 1 < length; i += 9) {
268 if (!((~AV_RN64A(src + i) &
269 (AV_RN64A(src + i) - 0x0100010001000101ULL)) &
270 0x8000800080008080ULL))
277 for (i = 0; i + 1 < length; i += 5) {
278 if (!((~AV_RN32A(src + i) &
279 (AV_RN32A(src + i) - 0x01000101U)) &
288 for (i = 0; i + 1 < length; i += 2) {
291 if (i > 0 && src[i - 1] == 0)
297 // use second escape buffer for inter data
298 bufidx = h->nal_unit_type == NAL_DPC ? 1 : 0;
300 av_fast_padded_malloc(&h->rbsp_buffer[bufidx], &h->rbsp_buffer_size[bufidx], length+MAX_MBPAIR_SIZE);
301 dst = h->rbsp_buffer[bufidx];
306 if(i>=length-1){ //no escaped 0
308 *consumed= length+1; //+1 for the header
309 if(h->avctx->flags2 & CODEC_FLAG2_FAST){
312 memcpy(dst, src, length);
319 while (si + 2 < length) {
320 // remove escapes (very rare 1:2^22)
321 if (src[si + 2] > 3) {
322 dst[di++] = src[si++];
323 dst[di++] = src[si++];
324 } else if (src[si] == 0 && src[si + 1] == 0 && src[si + 2] != 0) {
325 if (src[si + 2] == 3) { // escape
330 } else // next start code
334 dst[di++] = src[si++];
337 dst[di++] = src[si++];
340 memset(dst + di, 0, FF_INPUT_BUFFER_PADDING_SIZE);
343 *consumed = si + 1; // +1 for the header
344 /* FIXME store exact number of bits in the getbitcontext
345 * (it is needed for decoding) */
350 * Identify the exact end of the bitstream
351 * @return the length of the trailing, or 0 if damaged
353 static int decode_rbsp_trailing(H264Context *h, const uint8_t *src)
358 tprintf(h->avctx, "rbsp trailing %X\n", v);
360 for (r = 1; r < 9; r++) {
368 void ff_h264_free_tables(H264Context *h, int free_rbsp)
373 av_freep(&h->intra4x4_pred_mode);
374 av_freep(&h->chroma_pred_mode_table);
375 av_freep(&h->cbp_table);
376 av_freep(&h->mvd_table[0]);
377 av_freep(&h->mvd_table[1]);
378 av_freep(&h->direct_table);
379 av_freep(&h->non_zero_count);
380 av_freep(&h->slice_table_base);
381 h->slice_table = NULL;
382 av_freep(&h->list_counts);
384 av_freep(&h->mb2b_xy);
385 av_freep(&h->mb2br_xy);
387 av_buffer_pool_uninit(&h->qscale_table_pool);
388 av_buffer_pool_uninit(&h->mb_type_pool);
389 av_buffer_pool_uninit(&h->motion_val_pool);
390 av_buffer_pool_uninit(&h->ref_index_pool);
392 if (free_rbsp && h->DPB) {
393 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++)
394 ff_h264_unref_picture(h, &h->DPB[i]);
395 memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
398 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++)
399 h->DPB[i].needs_realloc = 1;
402 h->cur_pic_ptr = NULL;
404 for (i = 0; i < H264_MAX_THREADS; i++) {
405 hx = h->thread_context[i];
408 av_freep(&hx->top_borders[1]);
409 av_freep(&hx->top_borders[0]);
410 av_freep(&hx->bipred_scratchpad);
411 av_freep(&hx->edge_emu_buffer);
412 av_freep(&hx->dc_val_base);
413 av_freep(&hx->er.mb_index2xy);
414 av_freep(&hx->er.error_status_table);
415 av_freep(&hx->er.er_temp_buffer);
416 av_freep(&hx->er.mbintra_table);
417 av_freep(&hx->er.mbskip_table);
420 av_freep(&hx->rbsp_buffer[1]);
421 av_freep(&hx->rbsp_buffer[0]);
422 hx->rbsp_buffer_size[0] = 0;
423 hx->rbsp_buffer_size[1] = 0;
426 av_freep(&h->thread_context[i]);
430 int ff_h264_alloc_tables(H264Context *h)
432 const int big_mb_num = h->mb_stride * (h->mb_height + 1);
433 const int row_mb_num = 2*h->mb_stride*FFMAX(h->avctx->thread_count, 1);
436 FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->intra4x4_pred_mode,
437 row_mb_num, 8 * sizeof(uint8_t), fail)
438 h->slice_ctx[0].intra4x4_pred_mode = h->intra4x4_pred_mode;
440 FF_ALLOCZ_OR_GOTO(h->avctx, h->non_zero_count,
441 big_mb_num * 48 * sizeof(uint8_t), fail)
442 FF_ALLOCZ_OR_GOTO(h->avctx, h->slice_table_base,
443 (big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base), fail)
444 FF_ALLOCZ_OR_GOTO(h->avctx, h->cbp_table,
445 big_mb_num * sizeof(uint16_t), fail)
446 FF_ALLOCZ_OR_GOTO(h->avctx, h->chroma_pred_mode_table,
447 big_mb_num * sizeof(uint8_t), fail)
448 FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->mvd_table[0],
449 row_mb_num, 16 * sizeof(uint8_t), fail);
450 FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->mvd_table[1],
451 row_mb_num, 16 * sizeof(uint8_t), fail);
452 h->slice_ctx[0].mvd_table[0] = h->mvd_table[0];
453 h->slice_ctx[0].mvd_table[1] = h->mvd_table[1];
455 FF_ALLOCZ_OR_GOTO(h->avctx, h->direct_table,
456 4 * big_mb_num * sizeof(uint8_t), fail);
457 FF_ALLOCZ_OR_GOTO(h->avctx, h->list_counts,
458 big_mb_num * sizeof(uint8_t), fail)
460 memset(h->slice_table_base, -1,
461 (big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base));
462 h->slice_table = h->slice_table_base + h->mb_stride * 2 + 1;
464 FF_ALLOCZ_OR_GOTO(h->avctx, h->mb2b_xy,
465 big_mb_num * sizeof(uint32_t), fail);
466 FF_ALLOCZ_OR_GOTO(h->avctx, h->mb2br_xy,
467 big_mb_num * sizeof(uint32_t), fail);
468 for (y = 0; y < h->mb_height; y++)
469 for (x = 0; x < h->mb_width; x++) {
470 const int mb_xy = x + y * h->mb_stride;
471 const int b_xy = 4 * x + 4 * y * h->b_stride;
473 h->mb2b_xy[mb_xy] = b_xy;
474 h->mb2br_xy[mb_xy] = 8 * (FMO ? mb_xy : (mb_xy % (2 * h->mb_stride)));
477 if (!h->dequant4_coeff[0])
478 ff_h264_init_dequant_tables(h);
481 h->DPB = av_mallocz_array(H264_MAX_PICTURE_COUNT, sizeof(*h->DPB));
484 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++)
485 av_frame_unref(&h->DPB[i].f);
486 av_frame_unref(&h->cur_pic.f);
492 ff_h264_free_tables(h, 1);
493 return AVERROR(ENOMEM);
498 * Allocate buffers which are not shared amongst multiple threads.
500 int ff_h264_context_init(H264Context *h)
502 ERContext *er = &h->er;
503 int mb_array_size = h->mb_height * h->mb_stride;
504 int y_size = (2 * h->mb_width + 1) * (2 * h->mb_height + 1);
505 int c_size = h->mb_stride * (h->mb_height + 1);
506 int yc_size = y_size + 2 * c_size;
509 FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->top_borders[0],
510 h->mb_width, 16 * 3 * sizeof(uint8_t) * 2, fail)
511 FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->top_borders[1],
512 h->mb_width, 16 * 3 * sizeof(uint8_t) * 2, fail)
514 for (i = 0; i < h->nb_slice_ctx; i++) {
515 h->slice_ctx[i].ref_cache[0][scan8[5] + 1] =
516 h->slice_ctx[i].ref_cache[0][scan8[7] + 1] =
517 h->slice_ctx[i].ref_cache[0][scan8[13] + 1] =
518 h->slice_ctx[i].ref_cache[1][scan8[5] + 1] =
519 h->slice_ctx[i].ref_cache[1][scan8[7] + 1] =
520 h->slice_ctx[i].ref_cache[1][scan8[13] + 1] = PART_NOT_AVAILABLE;
523 if (CONFIG_ERROR_RESILIENCE) {
525 er->avctx = h->avctx;
526 er->decode_mb = h264_er_decode_mb;
528 er->quarter_sample = 1;
530 er->mb_num = h->mb_num;
531 er->mb_width = h->mb_width;
532 er->mb_height = h->mb_height;
533 er->mb_stride = h->mb_stride;
534 er->b8_stride = h->mb_width * 2 + 1;
536 // error resilience code looks cleaner with this
537 FF_ALLOCZ_OR_GOTO(h->avctx, er->mb_index2xy,
538 (h->mb_num + 1) * sizeof(int), fail);
540 for (y = 0; y < h->mb_height; y++)
541 for (x = 0; x < h->mb_width; x++)
542 er->mb_index2xy[x + y * h->mb_width] = x + y * h->mb_stride;
544 er->mb_index2xy[h->mb_height * h->mb_width] = (h->mb_height - 1) *
545 h->mb_stride + h->mb_width;
547 FF_ALLOCZ_OR_GOTO(h->avctx, er->error_status_table,
548 mb_array_size * sizeof(uint8_t), fail);
550 FF_ALLOC_OR_GOTO(h->avctx, er->mbintra_table, mb_array_size, fail);
551 memset(er->mbintra_table, 1, mb_array_size);
553 FF_ALLOCZ_OR_GOTO(h->avctx, er->mbskip_table, mb_array_size + 2, fail);
555 FF_ALLOC_OR_GOTO(h->avctx, er->er_temp_buffer,
556 h->mb_height * h->mb_stride, fail);
558 FF_ALLOCZ_OR_GOTO(h->avctx, h->dc_val_base,
559 yc_size * sizeof(int16_t), fail);
560 er->dc_val[0] = h->dc_val_base + h->mb_width * 2 + 2;
561 er->dc_val[1] = h->dc_val_base + y_size + h->mb_stride + 1;
562 er->dc_val[2] = er->dc_val[1] + c_size;
563 for (i = 0; i < yc_size; i++)
564 h->dc_val_base[i] = 1024;
570 return AVERROR(ENOMEM); // ff_h264_free_tables will clean up for us
573 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size,
574 int parse_extradata);
576 int ff_h264_decode_extradata(H264Context *h, const uint8_t *buf, int size)
578 AVCodecContext *avctx = h->avctx;
581 if (!buf || size <= 0)
586 const unsigned char *p = buf;
591 av_log(avctx, AV_LOG_ERROR,
592 "avcC %d too short\n", size);
593 return AVERROR_INVALIDDATA;
595 /* sps and pps in the avcC always have length coded with 2 bytes,
596 * so put a fake nal_length_size = 2 while parsing them */
597 h->nal_length_size = 2;
598 // Decode sps from avcC
599 cnt = *(p + 5) & 0x1f; // Number of sps
601 for (i = 0; i < cnt; i++) {
602 nalsize = AV_RB16(p) + 2;
603 if(nalsize > size - (p-buf))
604 return AVERROR_INVALIDDATA;
605 ret = decode_nal_units(h, p, nalsize, 1);
607 av_log(avctx, AV_LOG_ERROR,
608 "Decoding sps %d from avcC failed\n", i);
613 // Decode pps from avcC
614 cnt = *(p++); // Number of pps
615 for (i = 0; i < cnt; i++) {
616 nalsize = AV_RB16(p) + 2;
617 if(nalsize > size - (p-buf))
618 return AVERROR_INVALIDDATA;
619 ret = decode_nal_units(h, p, nalsize, 1);
621 av_log(avctx, AV_LOG_ERROR,
622 "Decoding pps %d from avcC failed\n", i);
627 // Store right nal length size that will be used to parse all other nals
628 h->nal_length_size = (buf[4] & 0x03) + 1;
631 ret = decode_nal_units(h, buf, size, 1);
638 av_cold int ff_h264_decode_init(AVCodecContext *avctx)
640 H264Context *h = avctx->priv_data;
646 h->bit_depth_luma = 8;
647 h->chroma_format_idc = 1;
649 h->avctx->bits_per_raw_sample = 8;
650 h->cur_chroma_format_idc = 1;
652 ff_h264dsp_init(&h->h264dsp, 8, 1);
653 av_assert0(h->sps.bit_depth_chroma == 0);
654 ff_h264chroma_init(&h->h264chroma, h->sps.bit_depth_chroma);
655 ff_h264qpel_init(&h->h264qpel, 8);
656 ff_h264_pred_init(&h->hpc, h->avctx->codec_id, 8, 1);
658 h->dequant_coeff_pps = -1;
659 h->current_sps_id = -1;
661 /* needed so that IDCT permutation is known early */
662 ff_videodsp_init(&h->vdsp, 8);
664 memset(h->pps.scaling_matrix4, 16, 6 * 16 * sizeof(uint8_t));
665 memset(h->pps.scaling_matrix8, 16, 2 * 64 * sizeof(uint8_t));
667 h->picture_structure = PICT_FRAME;
668 h->slice_context_count = 1;
669 h->workaround_bugs = avctx->workaround_bugs;
670 h->flags = avctx->flags;
673 // s->decode_mb = ff_h263_decode_mb;
674 if (!avctx->has_b_frames)
677 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
679 ff_h264_decode_init_vlc();
681 ff_init_cabac_states();
684 h->sps.bit_depth_luma = avctx->bits_per_raw_sample = 8;
686 h->nb_slice_ctx = (avctx->active_thread_type & FF_THREAD_SLICE) ? H264_MAX_THREADS : 1;
687 h->slice_ctx = av_mallocz_array(h->nb_slice_ctx, sizeof(*h->slice_ctx));
690 return AVERROR(ENOMEM);
693 h->thread_context[0] = h;
694 for (i = 0; i < h->nb_slice_ctx; i++)
695 h->slice_ctx[i].h264 = h->thread_context[0];
697 h->outputed_poc = h->next_outputed_poc = INT_MIN;
698 for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
699 h->last_pocs[i] = INT_MIN;
700 h->prev_poc_msb = 1 << 16;
701 h->prev_frame_num = -1;
703 h->sei_fpa.frame_packing_arrangement_cancel_flag = -1;
704 ff_h264_reset_sei(h);
705 if (avctx->codec_id == AV_CODEC_ID_H264) {
706 if (avctx->ticks_per_frame == 1) {
707 if(h->avctx->time_base.den < INT_MAX/2) {
708 h->avctx->time_base.den *= 2;
710 h->avctx->time_base.num /= 2;
712 avctx->ticks_per_frame = 2;
715 if (avctx->extradata_size > 0 && avctx->extradata) {
716 ret = ff_h264_decode_extradata(h, avctx->extradata, avctx->extradata_size);
718 ff_h264_free_context(h);
723 if (h->sps.bitstream_restriction_flag &&
724 h->avctx->has_b_frames < h->sps.num_reorder_frames) {
725 h->avctx->has_b_frames = h->sps.num_reorder_frames;
729 avctx->internal->allocate_progress = 1;
731 ff_h264_flush_change(h);
736 static int decode_init_thread_copy(AVCodecContext *avctx)
738 H264Context *h = avctx->priv_data;
741 if (!avctx->internal->is_copy)
743 memset(h->sps_buffers, 0, sizeof(h->sps_buffers));
744 memset(h->pps_buffers, 0, sizeof(h->pps_buffers));
746 h->nb_slice_ctx = (avctx->active_thread_type & FF_THREAD_SLICE) ? H264_MAX_THREADS : 1;
747 h->slice_ctx = av_mallocz_array(h->nb_slice_ctx, sizeof(*h->slice_ctx));
750 return AVERROR(ENOMEM);
753 for (i = 0; i < h->nb_slice_ctx; i++)
754 h->slice_ctx[i].h264 = h;
757 h->rbsp_buffer[0] = NULL;
758 h->rbsp_buffer[1] = NULL;
759 h->rbsp_buffer_size[0] = 0;
760 h->rbsp_buffer_size[1] = 0;
761 h->context_initialized = 0;
767 * Run setup operations that must be run after slice header decoding.
768 * This includes finding the next displayed frame.
770 * @param h h264 master context
771 * @param setup_finished enough NALs have been read that we can call
772 * ff_thread_finish_setup()
774 static void decode_postinit(H264Context *h, int setup_finished)
776 H264Picture *out = h->cur_pic_ptr;
777 H264Picture *cur = h->cur_pic_ptr;
778 int i, pics, out_of_order, out_idx;
780 h->cur_pic_ptr->f.pict_type = h->pict_type;
782 if (h->next_output_pic)
785 if (cur->field_poc[0] == INT_MAX || cur->field_poc[1] == INT_MAX) {
786 /* FIXME: if we have two PAFF fields in one packet, we can't start
787 * the next thread here. If we have one field per packet, we can.
788 * The check in decode_nal_units() is not good enough to find this
789 * yet, so we assume the worst for now. */
790 // if (setup_finished)
791 // ff_thread_finish_setup(h->avctx);
792 if (cur->field_poc[0] == INT_MAX && cur->field_poc[1] == INT_MAX)
794 if (h->avctx->hwaccel || h->missing_fields <=1)
798 cur->f.interlaced_frame = 0;
799 cur->f.repeat_pict = 0;
801 /* Signal interlacing information externally. */
802 /* Prioritize picture timing SEI information over used
803 * decoding process if it exists. */
805 if (h->sps.pic_struct_present_flag) {
806 switch (h->sei_pic_struct) {
807 case SEI_PIC_STRUCT_FRAME:
809 case SEI_PIC_STRUCT_TOP_FIELD:
810 case SEI_PIC_STRUCT_BOTTOM_FIELD:
811 cur->f.interlaced_frame = 1;
813 case SEI_PIC_STRUCT_TOP_BOTTOM:
814 case SEI_PIC_STRUCT_BOTTOM_TOP:
815 if (FIELD_OR_MBAFF_PICTURE(h))
816 cur->f.interlaced_frame = 1;
818 // try to flag soft telecine progressive
819 cur->f.interlaced_frame = h->prev_interlaced_frame;
821 case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
822 case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
823 /* Signal the possibility of telecined film externally
824 * (pic_struct 5,6). From these hints, let the applications
825 * decide if they apply deinterlacing. */
826 cur->f.repeat_pict = 1;
828 case SEI_PIC_STRUCT_FRAME_DOUBLING:
829 cur->f.repeat_pict = 2;
831 case SEI_PIC_STRUCT_FRAME_TRIPLING:
832 cur->f.repeat_pict = 4;
836 if ((h->sei_ct_type & 3) &&
837 h->sei_pic_struct <= SEI_PIC_STRUCT_BOTTOM_TOP)
838 cur->f.interlaced_frame = (h->sei_ct_type & (1 << 1)) != 0;
840 /* Derive interlacing flag from used decoding process. */
841 cur->f.interlaced_frame = FIELD_OR_MBAFF_PICTURE(h);
843 h->prev_interlaced_frame = cur->f.interlaced_frame;
845 if (cur->field_poc[0] != cur->field_poc[1]) {
846 /* Derive top_field_first from field pocs. */
847 cur->f.top_field_first = cur->field_poc[0] < cur->field_poc[1];
849 if (cur->f.interlaced_frame || h->sps.pic_struct_present_flag) {
850 /* Use picture timing SEI information. Even if it is a
851 * information of a past frame, better than nothing. */
852 if (h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM ||
853 h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM_TOP)
854 cur->f.top_field_first = 1;
856 cur->f.top_field_first = 0;
858 /* Most likely progressive */
859 cur->f.top_field_first = 0;
863 if (h->sei_frame_packing_present &&
864 h->frame_packing_arrangement_type >= 0 &&
865 h->frame_packing_arrangement_type <= 6 &&
866 h->content_interpretation_type > 0 &&
867 h->content_interpretation_type < 3) {
868 AVStereo3D *stereo = av_stereo3d_create_side_data(&cur->f);
870 switch (h->frame_packing_arrangement_type) {
872 stereo->type = AV_STEREO3D_CHECKERBOARD;
875 stereo->type = AV_STEREO3D_COLUMNS;
878 stereo->type = AV_STEREO3D_LINES;
881 if (h->quincunx_subsampling)
882 stereo->type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
884 stereo->type = AV_STEREO3D_SIDEBYSIDE;
887 stereo->type = AV_STEREO3D_TOPBOTTOM;
890 stereo->type = AV_STEREO3D_FRAMESEQUENCE;
893 stereo->type = AV_STEREO3D_2D;
897 if (h->content_interpretation_type == 2)
898 stereo->flags = AV_STEREO3D_FLAG_INVERT;
902 if (h->sei_display_orientation_present &&
903 (h->sei_anticlockwise_rotation || h->sei_hflip || h->sei_vflip)) {
904 double angle = h->sei_anticlockwise_rotation * 360 / (double) (1 << 16);
905 AVFrameSideData *rotation = av_frame_new_side_data(&cur->f,
906 AV_FRAME_DATA_DISPLAYMATRIX,
907 sizeof(int32_t) * 9);
909 av_display_rotation_set((int32_t *)rotation->data, angle);
910 av_display_matrix_flip((int32_t *)rotation->data,
911 h->sei_hflip, h->sei_vflip);
915 cur->mmco_reset = h->mmco_reset;
918 // FIXME do something with unavailable reference frames
920 /* Sort B-frames into display order */
922 if (h->sps.bitstream_restriction_flag &&
923 h->avctx->has_b_frames < h->sps.num_reorder_frames) {
924 h->avctx->has_b_frames = h->sps.num_reorder_frames;
928 if (h->avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT &&
929 !h->sps.bitstream_restriction_flag) {
930 h->avctx->has_b_frames = MAX_DELAYED_PIC_COUNT - 1;
934 for (i = 0; 1; i++) {
935 if(i == MAX_DELAYED_PIC_COUNT || cur->poc < h->last_pocs[i]){
937 h->last_pocs[i-1] = cur->poc;
940 h->last_pocs[i-1]= h->last_pocs[i];
943 out_of_order = MAX_DELAYED_PIC_COUNT - i;
944 if( cur->f.pict_type == AV_PICTURE_TYPE_B
945 || (h->last_pocs[MAX_DELAYED_PIC_COUNT-2] > INT_MIN && h->last_pocs[MAX_DELAYED_PIC_COUNT-1] - h->last_pocs[MAX_DELAYED_PIC_COUNT-2] > 2))
946 out_of_order = FFMAX(out_of_order, 1);
947 if (out_of_order == MAX_DELAYED_PIC_COUNT) {
948 av_log(h->avctx, AV_LOG_VERBOSE, "Invalid POC %d<%d\n", cur->poc, h->last_pocs[0]);
949 for (i = 1; i < MAX_DELAYED_PIC_COUNT; i++)
950 h->last_pocs[i] = INT_MIN;
951 h->last_pocs[0] = cur->poc;
953 } else if(h->avctx->has_b_frames < out_of_order && !h->sps.bitstream_restriction_flag){
954 av_log(h->avctx, AV_LOG_VERBOSE, "Increasing reorder buffer to %d\n", out_of_order);
955 h->avctx->has_b_frames = out_of_order;
960 while (h->delayed_pic[pics])
963 av_assert0(pics <= MAX_DELAYED_PIC_COUNT);
965 h->delayed_pic[pics++] = cur;
966 if (cur->reference == 0)
967 cur->reference = DELAYED_PIC_REF;
969 out = h->delayed_pic[0];
971 for (i = 1; h->delayed_pic[i] &&
972 !h->delayed_pic[i]->f.key_frame &&
973 !h->delayed_pic[i]->mmco_reset;
975 if (h->delayed_pic[i]->poc < out->poc) {
976 out = h->delayed_pic[i];
979 if (h->avctx->has_b_frames == 0 &&
980 (h->delayed_pic[0]->f.key_frame || h->delayed_pic[0]->mmco_reset))
981 h->next_outputed_poc = INT_MIN;
982 out_of_order = out->poc < h->next_outputed_poc;
984 if (out_of_order || pics > h->avctx->has_b_frames) {
985 out->reference &= ~DELAYED_PIC_REF;
986 // for frame threading, the owner must be the second field's thread or
987 // else the first thread can release the picture and reuse it unsafely
988 for (i = out_idx; h->delayed_pic[i]; i++)
989 h->delayed_pic[i] = h->delayed_pic[i + 1];
991 if (!out_of_order && pics > h->avctx->has_b_frames) {
992 h->next_output_pic = out;
993 if (out_idx == 0 && h->delayed_pic[0] && (h->delayed_pic[0]->f.key_frame || h->delayed_pic[0]->mmco_reset)) {
994 h->next_outputed_poc = INT_MIN;
996 h->next_outputed_poc = out->poc;
998 av_log(h->avctx, AV_LOG_DEBUG, "no picture %s\n", out_of_order ? "ooo" : "");
1001 if (h->next_output_pic) {
1002 if (h->next_output_pic->recovered) {
1003 // We have reached an recovery point and all frames after it in
1004 // display order are "recovered".
1005 h->frame_recovered |= FRAME_RECOVERED_SEI;
1007 h->next_output_pic->recovered |= !!(h->frame_recovered & FRAME_RECOVERED_SEI);
1010 if (setup_finished && !h->avctx->hwaccel)
1011 ff_thread_finish_setup(h->avctx);
1014 int ff_pred_weight_table(H264Context *h, H264SliceContext *sl)
1017 int luma_def, chroma_def;
1020 sl->use_weight_chroma = 0;
1021 sl->luma_log2_weight_denom = get_ue_golomb(&h->gb);
1022 if (h->sps.chroma_format_idc)
1023 sl->chroma_log2_weight_denom = get_ue_golomb(&h->gb);
1025 if (sl->luma_log2_weight_denom > 7U) {
1026 av_log(h->avctx, AV_LOG_ERROR, "luma_log2_weight_denom %d is out of range\n", sl->luma_log2_weight_denom);
1027 sl->luma_log2_weight_denom = 0;
1029 if (sl->chroma_log2_weight_denom > 7U) {
1030 av_log(h->avctx, AV_LOG_ERROR, "chroma_log2_weight_denom %d is out of range\n", sl->chroma_log2_weight_denom);
1031 sl->chroma_log2_weight_denom = 0;
1034 luma_def = 1 << sl->luma_log2_weight_denom;
1035 chroma_def = 1 << sl->chroma_log2_weight_denom;
1037 for (list = 0; list < 2; list++) {
1038 sl->luma_weight_flag[list] = 0;
1039 sl->chroma_weight_flag[list] = 0;
1040 for (i = 0; i < sl->ref_count[list]; i++) {
1041 int luma_weight_flag, chroma_weight_flag;
1043 luma_weight_flag = get_bits1(&h->gb);
1044 if (luma_weight_flag) {
1045 sl->luma_weight[i][list][0] = get_se_golomb(&h->gb);
1046 sl->luma_weight[i][list][1] = get_se_golomb(&h->gb);
1047 if (sl->luma_weight[i][list][0] != luma_def ||
1048 sl->luma_weight[i][list][1] != 0) {
1050 sl->luma_weight_flag[list] = 1;
1053 sl->luma_weight[i][list][0] = luma_def;
1054 sl->luma_weight[i][list][1] = 0;
1057 if (h->sps.chroma_format_idc) {
1058 chroma_weight_flag = get_bits1(&h->gb);
1059 if (chroma_weight_flag) {
1061 for (j = 0; j < 2; j++) {
1062 sl->chroma_weight[i][list][j][0] = get_se_golomb(&h->gb);
1063 sl->chroma_weight[i][list][j][1] = get_se_golomb(&h->gb);
1064 if (sl->chroma_weight[i][list][j][0] != chroma_def ||
1065 sl->chroma_weight[i][list][j][1] != 0) {
1066 sl->use_weight_chroma = 1;
1067 sl->chroma_weight_flag[list] = 1;
1072 for (j = 0; j < 2; j++) {
1073 sl->chroma_weight[i][list][j][0] = chroma_def;
1074 sl->chroma_weight[i][list][j][1] = 0;
1079 if (sl->slice_type_nos != AV_PICTURE_TYPE_B)
1082 sl->use_weight = sl->use_weight || sl->use_weight_chroma;
1087 * instantaneous decoder refresh.
1089 static void idr(H264Context *h)
1092 ff_h264_remove_all_refs(h);
1094 h->prev_frame_num_offset = 0;
1095 h->prev_poc_msb = 1<<16;
1096 h->prev_poc_lsb = 0;
1097 for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
1098 h->last_pocs[i] = INT_MIN;
1101 /* forget old pics after a seek */
1102 void ff_h264_flush_change(H264Context *h)
1106 h->outputed_poc = h->next_outputed_poc = INT_MIN;
1107 h->prev_interlaced_frame = 1;
1110 h->prev_frame_num = -1;
1111 if (h->cur_pic_ptr) {
1112 h->cur_pic_ptr->reference = 0;
1113 for (j=i=0; h->delayed_pic[i]; i++)
1114 if (h->delayed_pic[i] != h->cur_pic_ptr)
1115 h->delayed_pic[j++] = h->delayed_pic[i];
1116 h->delayed_pic[j] = NULL;
1118 ff_h264_unref_picture(h, &h->last_pic_for_ec);
1121 ff_h264_reset_sei(h);
1122 h->recovery_frame = -1;
1123 h->frame_recovered = 0;
1124 h->current_slice = 0;
1126 for (i = 0; i < h->nb_slice_ctx; i++)
1127 h->slice_ctx[i].list_count = 0;
1130 /* forget old pics after a seek */
1131 static void flush_dpb(AVCodecContext *avctx)
1133 H264Context *h = avctx->priv_data;
1136 memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
1138 ff_h264_flush_change(h);
1141 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++)
1142 ff_h264_unref_picture(h, &h->DPB[i]);
1143 h->cur_pic_ptr = NULL;
1144 ff_h264_unref_picture(h, &h->cur_pic);
1146 h->mb_x = h->mb_y = 0;
1148 ff_h264_free_tables(h, 1);
1149 h->context_initialized = 0;
1152 int ff_init_poc(H264Context *h, int pic_field_poc[2], int *pic_poc)
1154 const int max_frame_num = 1 << h->sps.log2_max_frame_num;
1157 h->frame_num_offset = h->prev_frame_num_offset;
1158 if (h->frame_num < h->prev_frame_num)
1159 h->frame_num_offset += max_frame_num;
1161 if (h->sps.poc_type == 0) {
1162 const int max_poc_lsb = 1 << h->sps.log2_max_poc_lsb;
1164 if (h->poc_lsb < h->prev_poc_lsb &&
1165 h->prev_poc_lsb - h->poc_lsb >= max_poc_lsb / 2)
1166 h->poc_msb = h->prev_poc_msb + max_poc_lsb;
1167 else if (h->poc_lsb > h->prev_poc_lsb &&
1168 h->prev_poc_lsb - h->poc_lsb < -max_poc_lsb / 2)
1169 h->poc_msb = h->prev_poc_msb - max_poc_lsb;
1171 h->poc_msb = h->prev_poc_msb;
1173 field_poc[1] = h->poc_msb + h->poc_lsb;
1174 if (h->picture_structure == PICT_FRAME)
1175 field_poc[1] += h->delta_poc_bottom;
1176 } else if (h->sps.poc_type == 1) {
1177 int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
1180 if (h->sps.poc_cycle_length != 0)
1181 abs_frame_num = h->frame_num_offset + h->frame_num;
1185 if (h->nal_ref_idc == 0 && abs_frame_num > 0)
1188 expected_delta_per_poc_cycle = 0;
1189 for (i = 0; i < h->sps.poc_cycle_length; i++)
1190 // FIXME integrate during sps parse
1191 expected_delta_per_poc_cycle += h->sps.offset_for_ref_frame[i];
1193 if (abs_frame_num > 0) {
1194 int poc_cycle_cnt = (abs_frame_num - 1) / h->sps.poc_cycle_length;
1195 int frame_num_in_poc_cycle = (abs_frame_num - 1) % h->sps.poc_cycle_length;
1197 expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
1198 for (i = 0; i <= frame_num_in_poc_cycle; i++)
1199 expectedpoc = expectedpoc + h->sps.offset_for_ref_frame[i];
1203 if (h->nal_ref_idc == 0)
1204 expectedpoc = expectedpoc + h->sps.offset_for_non_ref_pic;
1206 field_poc[0] = expectedpoc + h->delta_poc[0];
1207 field_poc[1] = field_poc[0] + h->sps.offset_for_top_to_bottom_field;
1209 if (h->picture_structure == PICT_FRAME)
1210 field_poc[1] += h->delta_poc[1];
1212 int poc = 2 * (h->frame_num_offset + h->frame_num);
1214 if (!h->nal_ref_idc)
1221 if (h->picture_structure != PICT_BOTTOM_FIELD)
1222 pic_field_poc[0] = field_poc[0];
1223 if (h->picture_structure != PICT_TOP_FIELD)
1224 pic_field_poc[1] = field_poc[1];
1225 *pic_poc = FFMIN(pic_field_poc[0], pic_field_poc[1]);
1231 * Compute profile from profile_idc and constraint_set?_flags.
1235 * @return profile as defined by FF_PROFILE_H264_*
1237 int ff_h264_get_profile(SPS *sps)
1239 int profile = sps->profile_idc;
1241 switch (sps->profile_idc) {
1242 case FF_PROFILE_H264_BASELINE:
1243 // constraint_set1_flag set to 1
1244 profile |= (sps->constraint_set_flags & 1 << 1) ? FF_PROFILE_H264_CONSTRAINED : 0;
1246 case FF_PROFILE_H264_HIGH_10:
1247 case FF_PROFILE_H264_HIGH_422:
1248 case FF_PROFILE_H264_HIGH_444_PREDICTIVE:
1249 // constraint_set3_flag set to 1
1250 profile |= (sps->constraint_set_flags & 1 << 3) ? FF_PROFILE_H264_INTRA : 0;
1257 int ff_h264_set_parameter_from_sps(H264Context *h)
1259 if (h->flags & CODEC_FLAG_LOW_DELAY ||
1260 (h->sps.bitstream_restriction_flag &&
1261 !h->sps.num_reorder_frames)) {
1262 if (h->avctx->has_b_frames > 1 || h->delayed_pic[0])
1263 av_log(h->avctx, AV_LOG_WARNING, "Delayed frames seen. "
1264 "Reenabling low delay requires a codec flush.\n");
1269 if (h->avctx->has_b_frames < 2)
1270 h->avctx->has_b_frames = !h->low_delay;
1272 if (h->avctx->bits_per_raw_sample != h->sps.bit_depth_luma ||
1273 h->cur_chroma_format_idc != h->sps.chroma_format_idc) {
1274 if (h->avctx->codec &&
1275 h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU &&
1276 (h->sps.bit_depth_luma != 8 || h->sps.chroma_format_idc > 1)) {
1277 av_log(h->avctx, AV_LOG_ERROR,
1278 "VDPAU decoding does not support video colorspace.\n");
1279 return AVERROR_INVALIDDATA;
1281 if (h->sps.bit_depth_luma >= 8 && h->sps.bit_depth_luma <= 14 &&
1282 h->sps.bit_depth_luma != 11 && h->sps.bit_depth_luma != 13) {
1283 h->avctx->bits_per_raw_sample = h->sps.bit_depth_luma;
1284 h->cur_chroma_format_idc = h->sps.chroma_format_idc;
1285 h->pixel_shift = h->sps.bit_depth_luma > 8;
1287 ff_h264dsp_init(&h->h264dsp, h->sps.bit_depth_luma,
1288 h->sps.chroma_format_idc);
1289 ff_h264chroma_init(&h->h264chroma, h->sps.bit_depth_chroma);
1290 ff_h264qpel_init(&h->h264qpel, h->sps.bit_depth_luma);
1291 ff_h264_pred_init(&h->hpc, h->avctx->codec_id, h->sps.bit_depth_luma,
1292 h->sps.chroma_format_idc);
1294 ff_videodsp_init(&h->vdsp, h->sps.bit_depth_luma);
1296 av_log(h->avctx, AV_LOG_ERROR, "Unsupported bit depth %d\n",
1297 h->sps.bit_depth_luma);
1298 return AVERROR_INVALIDDATA;
1304 int ff_set_ref_count(H264Context *h, H264SliceContext *sl)
1306 int ref_count[2], list_count;
1307 int num_ref_idx_active_override_flag;
1309 // set defaults, might be overridden a few lines later
1310 ref_count[0] = h->pps.ref_count[0];
1311 ref_count[1] = h->pps.ref_count[1];
1313 if (sl->slice_type_nos != AV_PICTURE_TYPE_I) {
1315 max[0] = max[1] = h->picture_structure == PICT_FRAME ? 15 : 31;
1317 if (sl->slice_type_nos == AV_PICTURE_TYPE_B)
1318 sl->direct_spatial_mv_pred = get_bits1(&h->gb);
1319 num_ref_idx_active_override_flag = get_bits1(&h->gb);
1321 if (num_ref_idx_active_override_flag) {
1322 ref_count[0] = get_ue_golomb(&h->gb) + 1;
1323 if (sl->slice_type_nos == AV_PICTURE_TYPE_B) {
1324 ref_count[1] = get_ue_golomb(&h->gb) + 1;
1326 // full range is spec-ok in this case, even for frames
1330 if (ref_count[0]-1 > max[0] || ref_count[1]-1 > max[1]){
1331 av_log(h->avctx, AV_LOG_ERROR, "reference overflow %u > %u or %u > %u\n", ref_count[0]-1, max[0], ref_count[1]-1, max[1]);
1332 sl->ref_count[0] = sl->ref_count[1] = 0;
1334 return AVERROR_INVALIDDATA;
1337 if (sl->slice_type_nos == AV_PICTURE_TYPE_B)
1343 ref_count[0] = ref_count[1] = 0;
1346 if (list_count != sl->list_count ||
1347 ref_count[0] != sl->ref_count[0] ||
1348 ref_count[1] != sl->ref_count[1]) {
1349 sl->ref_count[0] = ref_count[0];
1350 sl->ref_count[1] = ref_count[1];
1351 sl->list_count = list_count;
1358 static const uint8_t start_code[] = { 0x00, 0x00, 0x01 };
1360 static int get_bit_length(H264Context *h, const uint8_t *buf,
1361 const uint8_t *ptr, int dst_length,
1362 int i, int next_avc)
1364 if ((h->workaround_bugs & FF_BUG_AUTODETECT) && i + 3 < next_avc &&
1365 buf[i] == 0x00 && buf[i + 1] == 0x00 &&
1366 buf[i + 2] == 0x01 && buf[i + 3] == 0xE0)
1367 h->workaround_bugs |= FF_BUG_TRUNCATED;
1369 if (!(h->workaround_bugs & FF_BUG_TRUNCATED))
1370 while (dst_length > 0 && ptr[dst_length - 1] == 0)
1376 return 8 * dst_length - decode_rbsp_trailing(h, ptr + dst_length - 1);
1379 static int get_last_needed_nal(H264Context *h, const uint8_t *buf, int buf_size)
1381 int next_avc = h->is_avc ? 0 : buf_size;
1384 int nals_needed = 0;
1385 int first_slice = 0;
1389 int dst_length, bit_length, consumed;
1392 if (buf_index >= next_avc) {
1393 nalsize = get_avc_nalsize(h, buf, buf_size, &buf_index);
1396 next_avc = buf_index + nalsize;
1398 buf_index = find_start_code(buf, buf_size, buf_index, next_avc);
1399 if (buf_index >= buf_size)
1401 if (buf_index >= next_avc)
1405 ptr = ff_h264_decode_nal(h, buf + buf_index, &dst_length, &consumed,
1406 next_avc - buf_index);
1408 if (!ptr || dst_length < 0)
1409 return AVERROR_INVALIDDATA;
1411 buf_index += consumed;
1413 bit_length = get_bit_length(h, buf, ptr, dst_length,
1414 buf_index, next_avc);
1417 /* packets can sometimes contain multiple PPS/SPS,
1418 * e.g. two PAFF field pictures in one packet, or a demuxer
1419 * which splits NALs strangely if so, when frame threading we
1420 * can't start the next thread until we've read all of them */
1421 switch (h->nal_unit_type) {
1424 nals_needed = nal_index;
1429 init_get_bits(&h->gb, ptr, bit_length);
1430 if (!get_ue_golomb(&h->gb) ||
1432 first_slice != h->nal_unit_type)
1433 nals_needed = nal_index;
1435 first_slice = h->nal_unit_type;
1442 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size,
1443 int parse_extradata)
1445 AVCodecContext *const avctx = h->avctx;
1446 H264Context *hx; ///< thread context
1447 H264SliceContext *sl;
1449 unsigned context_count;
1451 int nals_needed = 0; ///< number of NALs that need decoding before the next frame thread starts
1456 h->nal_unit_type= 0;
1458 if(!h->slice_context_count)
1459 h->slice_context_count= 1;
1460 h->max_contexts = h->slice_context_count;
1461 if (!(avctx->flags2 & CODEC_FLAG2_CHUNKS)) {
1462 h->current_slice = 0;
1463 if (!h->first_field)
1464 h->cur_pic_ptr = NULL;
1465 ff_h264_reset_sei(h);
1468 if (h->nal_length_size == 4) {
1469 if (buf_size > 8 && AV_RB32(buf) == 1 && AV_RB32(buf+5) > (unsigned)buf_size) {
1471 }else if(buf_size > 3 && AV_RB32(buf) > 1 && AV_RB32(buf) <= (unsigned)buf_size)
1475 if (avctx->active_thread_type & FF_THREAD_FRAME)
1476 nals_needed = get_last_needed_nal(h, buf, buf_size);
1481 next_avc = h->is_avc ? 0 : buf_size;
1491 if (buf_index >= next_avc) {
1492 nalsize = get_avc_nalsize(h, buf, buf_size, &buf_index);
1495 next_avc = buf_index + nalsize;
1497 buf_index = find_start_code(buf, buf_size, buf_index, next_avc);
1498 if (buf_index >= buf_size)
1500 if (buf_index >= next_avc)
1504 hx = h->thread_context[context_count];
1505 sl = &h->slice_ctx[context_count];
1507 ptr = ff_h264_decode_nal(hx, buf + buf_index, &dst_length,
1508 &consumed, next_avc - buf_index);
1509 if (!ptr || dst_length < 0) {
1514 bit_length = get_bit_length(h, buf, ptr, dst_length,
1515 buf_index + consumed, next_avc);
1517 if (h->avctx->debug & FF_DEBUG_STARTCODE)
1518 av_log(h->avctx, AV_LOG_DEBUG,
1519 "NAL %d/%d at %d/%d length %d\n",
1520 hx->nal_unit_type, hx->nal_ref_idc, buf_index, buf_size, dst_length);
1522 if (h->is_avc && (nalsize != consumed) && nalsize)
1523 av_log(h->avctx, AV_LOG_DEBUG,
1524 "AVC: Consumed only %d bytes instead of %d\n",
1527 buf_index += consumed;
1530 if (avctx->skip_frame >= AVDISCARD_NONREF &&
1531 h->nal_ref_idc == 0 &&
1532 h->nal_unit_type != NAL_SEI)
1536 if ( (!(avctx->active_thread_type & FF_THREAD_FRAME) || nals_needed >= nal_index)
1537 && !h->current_slice)
1539 /* Ignore per frame NAL unit type during extradata
1540 * parsing. Decoding slices is not possible in codec init
1542 if (parse_extradata) {
1543 switch (hx->nal_unit_type) {
1549 av_log(h->avctx, AV_LOG_WARNING,
1550 "Ignoring NAL %d in global header/extradata\n",
1552 // fall through to next case
1553 case NAL_AUXILIARY_SLICE:
1554 hx->nal_unit_type = NAL_FF_IGNORE;
1560 switch (hx->nal_unit_type) {
1562 if ((ptr[0] & 0xFC) == 0x98) {
1563 av_log(h->avctx, AV_LOG_ERROR, "Invalid inter IDR frame\n");
1564 h->next_outputed_poc = INT_MIN;
1568 if (h->nal_unit_type != NAL_IDR_SLICE) {
1569 av_log(h->avctx, AV_LOG_ERROR,
1570 "Invalid mix of idr and non-idr slices\n");
1575 idr(h); // FIXME ensure we don't lose some frames if there is reordering
1577 h->has_recovery_point = 1;
1579 init_get_bits(&hx->gb, ptr, bit_length);
1581 hx->inter_gb_ptr = &hx->gb;
1583 if ((err = ff_h264_decode_slice_header(hx, sl, h)))
1586 if (h->sei_recovery_frame_cnt >= 0) {
1587 if (h->frame_num != h->sei_recovery_frame_cnt || sl->slice_type_nos != AV_PICTURE_TYPE_I)
1588 h->valid_recovery_point = 1;
1590 if ( h->recovery_frame < 0
1591 || ((h->recovery_frame - h->frame_num) & ((1 << h->sps.log2_max_frame_num)-1)) > h->sei_recovery_frame_cnt) {
1592 h->recovery_frame = (h->frame_num + h->sei_recovery_frame_cnt) &
1593 ((1 << h->sps.log2_max_frame_num) - 1);
1595 if (!h->valid_recovery_point)
1596 h->recovery_frame = h->frame_num;
1600 h->cur_pic_ptr->f.key_frame |=
1601 (hx->nal_unit_type == NAL_IDR_SLICE);
1603 if (hx->nal_unit_type == NAL_IDR_SLICE ||
1604 h->recovery_frame == h->frame_num) {
1605 h->recovery_frame = -1;
1606 h->cur_pic_ptr->recovered = 1;
1608 // If we have an IDR, all frames after it in decoded order are
1610 if (hx->nal_unit_type == NAL_IDR_SLICE)
1611 h->frame_recovered |= FRAME_RECOVERED_IDR;
1612 h->frame_recovered |= 3*!!(avctx->flags2 & CODEC_FLAG2_SHOW_ALL);
1613 h->frame_recovered |= 3*!!(avctx->flags & CODEC_FLAG_OUTPUT_CORRUPT);
1615 h->cur_pic_ptr->recovered |= h->frame_recovered;
1617 h->cur_pic_ptr->recovered |= !!(h->frame_recovered & FRAME_RECOVERED_IDR);
1620 if (h->current_slice == 1) {
1621 if (!(avctx->flags2 & CODEC_FLAG2_CHUNKS))
1622 decode_postinit(h, nal_index >= nals_needed);
1624 if (h->avctx->hwaccel &&
1625 (ret = h->avctx->hwaccel->start_frame(h->avctx, NULL, 0)) < 0)
1627 if (CONFIG_H264_VDPAU_DECODER &&
1628 h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU)
1629 ff_vdpau_h264_picture_start(h);
1632 if (hx->redundant_pic_count == 0) {
1633 if (avctx->hwaccel) {
1634 ret = avctx->hwaccel->decode_slice(avctx,
1635 &buf[buf_index - consumed],
1639 } else if (CONFIG_H264_VDPAU_DECODER &&
1640 h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU) {
1641 ff_vdpau_add_data_chunk(h->cur_pic_ptr->f.data[0],
1643 sizeof(start_code));
1644 ff_vdpau_add_data_chunk(h->cur_pic_ptr->f.data[0],
1645 &buf[buf_index - consumed],
1654 avpriv_request_sample(avctx, "data partitioning");
1655 ret = AVERROR(ENOSYS);
1659 init_get_bits(&h->gb, ptr, bit_length);
1660 ret = ff_h264_decode_sei(h);
1661 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1665 init_get_bits(&h->gb, ptr, bit_length);
1666 if (ff_h264_decode_seq_parameter_set(h) < 0 && (h->is_avc ? nalsize : 1)) {
1667 av_log(h->avctx, AV_LOG_DEBUG,
1668 "SPS decoding failure, trying again with the complete NAL\n");
1670 av_assert0(next_avc - buf_index + consumed == nalsize);
1671 if ((next_avc - buf_index + consumed - 1) >= INT_MAX/8)
1673 init_get_bits(&h->gb, &buf[buf_index + 1 - consumed],
1674 8*(next_avc - buf_index + consumed - 1));
1675 ff_h264_decode_seq_parameter_set(h);
1680 init_get_bits(&h->gb, ptr, bit_length);
1681 ret = ff_h264_decode_picture_parameter_set(h, bit_length);
1682 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1686 case NAL_END_SEQUENCE:
1687 case NAL_END_STREAM:
1688 case NAL_FILLER_DATA:
1690 case NAL_AUXILIARY_SLICE:
1695 av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n",
1696 hx->nal_unit_type, bit_length);
1699 if (context_count == h->max_contexts) {
1700 ret = ff_h264_execute_decode_slices(h, context_count);
1701 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1706 if (err < 0 || err == SLICE_SKIPED) {
1708 av_log(h->avctx, AV_LOG_ERROR, "decode_slice_header error\n");
1709 sl->ref_count[0] = sl->ref_count[1] = sl->list_count = 0;
1710 } else if (err == SLICE_SINGLETHREAD) {
1711 /* Slice could not be decoded in parallel mode, copy down
1712 * NAL unit stuff to context 0 and restart. Note that
1713 * rbsp_buffer is not transferred, but since we no longer
1714 * run in parallel mode this should not be an issue. */
1715 h->nal_unit_type = hx->nal_unit_type;
1716 h->nal_ref_idc = hx->nal_ref_idc;
1718 sl = &h->slice_ctx[0];
1723 if (context_count) {
1724 ret = ff_h264_execute_decode_slices(h, context_count);
1725 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1732 if (h->cur_pic_ptr && !h->droppable) {
1733 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
1734 h->picture_structure == PICT_BOTTOM_FIELD);
1737 return (ret < 0) ? ret : buf_index;
1741 * Return the number of bytes consumed for building the current frame.
1743 static int get_consumed_bytes(int pos, int buf_size)
1746 pos = 1; // avoid infinite loops (I doubt that is needed but...)
1747 if (pos + 10 > buf_size)
1748 pos = buf_size; // oops ;)
1753 static int output_frame(H264Context *h, AVFrame *dst, H264Picture *srcp)
1755 AVFrame *src = &srcp->f;
1756 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(src->format);
1758 int ret = av_frame_ref(dst, src);
1762 av_dict_set(&dst->metadata, "stereo_mode", ff_h264_sei_stereo_mode(h), 0);
1764 if (srcp->sei_recovery_frame_cnt == 0)
1769 for (i = 0; i < desc->nb_components; i++) {
1770 int hshift = (i > 0) ? desc->log2_chroma_w : 0;
1771 int vshift = (i > 0) ? desc->log2_chroma_h : 0;
1772 int off = ((srcp->crop_left >> hshift) << h->pixel_shift) +
1773 (srcp->crop_top >> vshift) * dst->linesize[i];
1774 dst->data[i] += off;
1779 static int is_extra(const uint8_t *buf, int buf_size)
1781 int cnt= buf[5]&0x1f;
1782 const uint8_t *p= buf+6;
1784 int nalsize= AV_RB16(p) + 2;
1785 if(nalsize > buf_size - (p-buf) || p[2]!=0x67)
1793 int nalsize= AV_RB16(p) + 2;
1794 if(nalsize > buf_size - (p-buf) || p[2]!=0x68)
1801 static int h264_decode_frame(AVCodecContext *avctx, void *data,
1802 int *got_frame, AVPacket *avpkt)
1804 const uint8_t *buf = avpkt->data;
1805 int buf_size = avpkt->size;
1806 H264Context *h = avctx->priv_data;
1807 AVFrame *pict = data;
1813 h->flags = avctx->flags;
1815 ff_h264_unref_picture(h, &h->last_pic_for_ec);
1817 /* end of stream, output what is still in the buffers */
1818 if (buf_size == 0) {
1821 h->cur_pic_ptr = NULL;
1824 // FIXME factorize this with the output code below
1825 out = h->delayed_pic[0];
1828 h->delayed_pic[i] &&
1829 !h->delayed_pic[i]->f.key_frame &&
1830 !h->delayed_pic[i]->mmco_reset;
1832 if (h->delayed_pic[i]->poc < out->poc) {
1833 out = h->delayed_pic[i];
1837 for (i = out_idx; h->delayed_pic[i]; i++)
1838 h->delayed_pic[i] = h->delayed_pic[i + 1];
1841 out->reference &= ~DELAYED_PIC_REF;
1842 ret = output_frame(h, pict, out);
1850 if (h->is_avc && av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, NULL)) {
1852 uint8_t *side = av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, &side_size);
1853 if (is_extra(side, side_size))
1854 ff_h264_decode_extradata(h, side, side_size);
1856 if(h->is_avc && buf_size >= 9 && buf[0]==1 && buf[2]==0 && (buf[4]&0xFC)==0xFC && (buf[5]&0x1F) && buf[8]==0x67){
1857 if (is_extra(buf, buf_size))
1858 return ff_h264_decode_extradata(h, buf, buf_size);
1861 buf_index = decode_nal_units(h, buf, buf_size, 0);
1863 return AVERROR_INVALIDDATA;
1865 if (!h->cur_pic_ptr && h->nal_unit_type == NAL_END_SEQUENCE) {
1866 av_assert0(buf_index <= buf_size);
1870 if (!(avctx->flags2 & CODEC_FLAG2_CHUNKS) && !h->cur_pic_ptr) {
1871 if (avctx->skip_frame >= AVDISCARD_NONREF ||
1872 buf_size >= 4 && !memcmp("Q264", buf, 4))
1874 av_log(avctx, AV_LOG_ERROR, "no frame!\n");
1875 return AVERROR_INVALIDDATA;
1878 if (!(avctx->flags2 & CODEC_FLAG2_CHUNKS) ||
1879 (h->mb_y >= h->mb_height && h->mb_height)) {
1880 if (avctx->flags2 & CODEC_FLAG2_CHUNKS)
1881 decode_postinit(h, 1);
1883 ff_h264_field_end(h, &h->slice_ctx[0], 0);
1885 /* Wait for second field. */
1887 if (h->next_output_pic && (
1888 h->next_output_pic->recovered)) {
1889 if (!h->next_output_pic->recovered)
1890 h->next_output_pic->f.flags |= AV_FRAME_FLAG_CORRUPT;
1892 if (!h->avctx->hwaccel &&
1893 (h->next_output_pic->field_poc[0] == INT_MAX ||
1894 h->next_output_pic->field_poc[1] == INT_MAX)
1897 AVFrame *f = &h->next_output_pic->f;
1898 int field = h->next_output_pic->field_poc[0] == INT_MAX;
1899 uint8_t *dst_data[4];
1901 const uint8_t *src_data[4];
1903 av_log(h->avctx, AV_LOG_DEBUG, "Duplicating field %d to fill missing\n", field);
1905 for (p = 0; p<4; p++) {
1906 dst_data[p] = f->data[p] + (field^1)*f->linesize[p];
1907 src_data[p] = f->data[p] + field *f->linesize[p];
1908 linesizes[p] = 2*f->linesize[p];
1911 av_image_copy(dst_data, linesizes, src_data, linesizes,
1912 f->format, f->width, f->height>>1);
1915 ret = output_frame(h, pict, h->next_output_pic);
1919 if (CONFIG_MPEGVIDEO) {
1920 ff_print_debug_info2(h->avctx, pict, h->er.mbskip_table,
1921 h->next_output_pic->mb_type,
1922 h->next_output_pic->qscale_table,
1923 h->next_output_pic->motion_val,
1925 h->mb_width, h->mb_height, h->mb_stride, 1);
1930 av_assert0(pict->buf[0] || !*got_frame);
1932 ff_h264_unref_picture(h, &h->last_pic_for_ec);
1934 return get_consumed_bytes(buf_index, buf_size);
1937 av_cold void ff_h264_free_context(H264Context *h)
1941 ff_h264_free_tables(h, 1); // FIXME cleanup init stuff perhaps
1943 av_freep(&h->slice_ctx);
1944 h->nb_slice_ctx = 0;
1946 for (i = 0; i < MAX_SPS_COUNT; i++)
1947 av_freep(h->sps_buffers + i);
1949 for (i = 0; i < MAX_PPS_COUNT; i++)
1950 av_freep(h->pps_buffers + i);
1953 static av_cold int h264_decode_end(AVCodecContext *avctx)
1955 H264Context *h = avctx->priv_data;
1957 ff_h264_remove_all_refs(h);
1958 ff_h264_free_context(h);
1960 ff_h264_unref_picture(h, &h->cur_pic);
1961 ff_h264_unref_picture(h, &h->last_pic_for_ec);
1966 static const AVProfile profiles[] = {
1967 { FF_PROFILE_H264_BASELINE, "Baseline" },
1968 { FF_PROFILE_H264_CONSTRAINED_BASELINE, "Constrained Baseline" },
1969 { FF_PROFILE_H264_MAIN, "Main" },
1970 { FF_PROFILE_H264_EXTENDED, "Extended" },
1971 { FF_PROFILE_H264_HIGH, "High" },
1972 { FF_PROFILE_H264_HIGH_10, "High 10" },
1973 { FF_PROFILE_H264_HIGH_10_INTRA, "High 10 Intra" },
1974 { FF_PROFILE_H264_HIGH_422, "High 4:2:2" },
1975 { FF_PROFILE_H264_HIGH_422_INTRA, "High 4:2:2 Intra" },
1976 { FF_PROFILE_H264_HIGH_444, "High 4:4:4" },
1977 { FF_PROFILE_H264_HIGH_444_PREDICTIVE, "High 4:4:4 Predictive" },
1978 { FF_PROFILE_H264_HIGH_444_INTRA, "High 4:4:4 Intra" },
1979 { FF_PROFILE_H264_CAVLC_444, "CAVLC 4:4:4" },
1980 { FF_PROFILE_UNKNOWN },
1983 static const AVOption h264_options[] = {
1984 {"is_avc", "is avc", offsetof(H264Context, is_avc), FF_OPT_TYPE_INT, {.i64 = 0}, 0, 1, 0},
1985 {"nal_length_size", "nal_length_size", offsetof(H264Context, nal_length_size), FF_OPT_TYPE_INT, {.i64 = 0}, 0, 4, 0},
1989 static const AVClass h264_class = {
1990 .class_name = "H264 Decoder",
1991 .item_name = av_default_item_name,
1992 .option = h264_options,
1993 .version = LIBAVUTIL_VERSION_INT,
1996 AVCodec ff_h264_decoder = {
1998 .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
1999 .type = AVMEDIA_TYPE_VIDEO,
2000 .id = AV_CODEC_ID_H264,
2001 .priv_data_size = sizeof(H264Context),
2002 .init = ff_h264_decode_init,
2003 .close = h264_decode_end,
2004 .decode = h264_decode_frame,
2005 .capabilities = /*CODEC_CAP_DRAW_HORIZ_BAND |*/ CODEC_CAP_DR1 |
2006 CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS |
2007 CODEC_CAP_FRAME_THREADS,
2009 .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
2010 .update_thread_context = ONLY_IF_THREADS_ENABLED(ff_h264_update_thread_context),
2011 .profiles = NULL_IF_CONFIG_SMALL(profiles),
2012 .priv_class = &h264_class,
2015 #if CONFIG_H264_VDPAU_DECODER
2016 static const AVClass h264_vdpau_class = {
2017 .class_name = "H264 VDPAU Decoder",
2018 .item_name = av_default_item_name,
2019 .option = h264_options,
2020 .version = LIBAVUTIL_VERSION_INT,
2023 AVCodec ff_h264_vdpau_decoder = {
2024 .name = "h264_vdpau",
2025 .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (VDPAU acceleration)"),
2026 .type = AVMEDIA_TYPE_VIDEO,
2027 .id = AV_CODEC_ID_H264,
2028 .priv_data_size = sizeof(H264Context),
2029 .init = ff_h264_decode_init,
2030 .close = h264_decode_end,
2031 .decode = h264_decode_frame,
2032 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,
2034 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_VDPAU_H264,
2036 .profiles = NULL_IF_CONFIG_SMALL(profiles),
2037 .priv_class = &h264_vdpau_class,