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_compat.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 sl->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].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 * sl->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 sl->mb_field_decoding_flag = 0;
95 ff_h264_hl_decode_mb(h, &h->slice_ctx[0]);
98 void ff_h264_draw_horiz_band(const H264Context *h, H264SliceContext *sl,
101 AVCodecContext *avctx = h->avctx;
102 const AVFrame *src = h->cur_pic.f;
103 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
104 int vshift = desc->log2_chroma_h;
105 const int field_pic = h->picture_structure != PICT_FRAME;
111 height = FFMIN(height, avctx->height - y);
113 if (field_pic && h->first_field && !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD))
116 if (avctx->draw_horiz_band) {
117 int offset[AV_NUM_DATA_POINTERS];
120 offset[0] = y * src->linesize[0];
122 offset[2] = (y >> vshift) * src->linesize[1];
123 for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
128 avctx->draw_horiz_band(avctx, src, offset,
129 y, h->picture_structure, height);
134 * Check if the top & left blocks are available if needed and
135 * change the dc mode so it only uses the available blocks.
137 int ff_h264_check_intra4x4_pred_mode(const H264Context *h, H264SliceContext *sl)
139 static const int8_t top[12] = {
140 -1, 0, LEFT_DC_PRED, -1, -1, -1, -1, -1, 0
142 static const int8_t left[12] = {
143 0, -1, TOP_DC_PRED, 0, -1, -1, -1, 0, -1, DC_128_PRED
147 if (!(sl->top_samples_available & 0x8000)) {
148 for (i = 0; i < 4; i++) {
149 int status = top[sl->intra4x4_pred_mode_cache[scan8[0] + i]];
151 av_log(h->avctx, AV_LOG_ERROR,
152 "top block unavailable for requested intra4x4 mode %d at %d %d\n",
153 status, sl->mb_x, sl->mb_y);
154 return AVERROR_INVALIDDATA;
156 sl->intra4x4_pred_mode_cache[scan8[0] + i] = status;
161 if ((sl->left_samples_available & 0x8888) != 0x8888) {
162 static const int mask[4] = { 0x8000, 0x2000, 0x80, 0x20 };
163 for (i = 0; i < 4; i++)
164 if (!(sl->left_samples_available & mask[i])) {
165 int status = left[sl->intra4x4_pred_mode_cache[scan8[0] + 8 * i]];
167 av_log(h->avctx, AV_LOG_ERROR,
168 "left block unavailable for requested intra4x4 mode %d at %d %d\n",
169 status, sl->mb_x, sl->mb_y);
170 return AVERROR_INVALIDDATA;
172 sl->intra4x4_pred_mode_cache[scan8[0] + 8 * i] = status;
178 } // FIXME cleanup like ff_h264_check_intra_pred_mode
181 * Check if the top & left blocks are available if needed and
182 * change the dc mode so it only uses the available blocks.
184 int ff_h264_check_intra_pred_mode(const H264Context *h, H264SliceContext *sl,
185 int mode, int is_chroma)
187 static const int8_t top[4] = { LEFT_DC_PRED8x8, 1, -1, -1 };
188 static const int8_t left[5] = { TOP_DC_PRED8x8, -1, 2, -1, DC_128_PRED8x8 };
191 av_log(h->avctx, AV_LOG_ERROR,
192 "out of range intra chroma pred mode at %d %d\n",
194 return AVERROR_INVALIDDATA;
197 if (!(sl->top_samples_available & 0x8000)) {
200 av_log(h->avctx, AV_LOG_ERROR,
201 "top block unavailable for requested intra mode at %d %d\n",
203 return AVERROR_INVALIDDATA;
207 if ((sl->left_samples_available & 0x8080) != 0x8080) {
210 av_log(h->avctx, AV_LOG_ERROR,
211 "left block unavailable for requested intra mode at %d %d\n",
213 return AVERROR_INVALIDDATA;
215 if (is_chroma && (sl->left_samples_available & 0x8080)) {
216 // mad cow disease mode, aka MBAFF + constrained_intra_pred
217 mode = ALZHEIMER_DC_L0T_PRED8x8 +
218 (!(sl->left_samples_available & 0x8000)) +
219 2 * (mode == DC_128_PRED8x8);
226 const uint8_t *ff_h264_decode_nal(H264Context *h, H264SliceContext *sl,
228 int *dst_length, int *consumed, int length)
233 // src[0]&0x80; // forbidden bit
234 h->nal_ref_idc = src[0] >> 5;
235 h->nal_unit_type = src[0] & 0x1F;
240 #define STARTCODE_TEST \
241 if (i + 2 < length && src[i + 1] == 0 && src[i + 2] <= 3) { \
242 if (src[i + 2] != 3 && src[i + 2] != 0) { \
243 /* startcode, so we must be past the end */ \
249 #if HAVE_FAST_UNALIGNED
250 #define FIND_FIRST_ZERO \
251 if (i > 0 && !src[i]) \
257 for (i = 0; i + 1 < length; i += 9) {
258 if (!((~AV_RN64A(src + i) &
259 (AV_RN64A(src + i) - 0x0100010001000101ULL)) &
260 0x8000800080008080ULL))
267 for (i = 0; i + 1 < length; i += 5) {
268 if (!((~AV_RN32A(src + i) &
269 (AV_RN32A(src + i) - 0x01000101U)) &
278 for (i = 0; i + 1 < length; i += 2) {
281 if (i > 0 && src[i - 1] == 0)
287 av_fast_padded_malloc(&sl->rbsp_buffer, &sl->rbsp_buffer_size, length+MAX_MBPAIR_SIZE);
288 dst = sl->rbsp_buffer;
293 if(i>=length-1){ //no escaped 0
295 *consumed= length+1; //+1 for the header
296 if(h->avctx->flags2 & CODEC_FLAG2_FAST){
299 memcpy(dst, src, length);
306 while (si + 2 < length) {
307 // remove escapes (very rare 1:2^22)
308 if (src[si + 2] > 3) {
309 dst[di++] = src[si++];
310 dst[di++] = src[si++];
311 } else if (src[si] == 0 && src[si + 1] == 0 && src[si + 2] != 0) {
312 if (src[si + 2] == 3) { // escape
317 } else // next start code
321 dst[di++] = src[si++];
324 dst[di++] = src[si++];
327 memset(dst + di, 0, FF_INPUT_BUFFER_PADDING_SIZE);
330 *consumed = si + 1; // +1 for the header
331 /* FIXME store exact number of bits in the getbitcontext
332 * (it is needed for decoding) */
337 * Identify the exact end of the bitstream
338 * @return the length of the trailing, or 0 if damaged
340 static int decode_rbsp_trailing(H264Context *h, const uint8_t *src)
345 ff_tlog(h->avctx, "rbsp trailing %X\n", v);
347 for (r = 1; r < 9; r++) {
355 void ff_h264_free_tables(H264Context *h)
359 av_freep(&h->intra4x4_pred_mode);
360 av_freep(&h->chroma_pred_mode_table);
361 av_freep(&h->cbp_table);
362 av_freep(&h->mvd_table[0]);
363 av_freep(&h->mvd_table[1]);
364 av_freep(&h->direct_table);
365 av_freep(&h->non_zero_count);
366 av_freep(&h->slice_table_base);
367 h->slice_table = NULL;
368 av_freep(&h->list_counts);
370 av_freep(&h->mb2b_xy);
371 av_freep(&h->mb2br_xy);
373 av_buffer_pool_uninit(&h->qscale_table_pool);
374 av_buffer_pool_uninit(&h->mb_type_pool);
375 av_buffer_pool_uninit(&h->motion_val_pool);
376 av_buffer_pool_uninit(&h->ref_index_pool);
378 for (i = 0; i < h->nb_slice_ctx; i++) {
379 H264SliceContext *sl = &h->slice_ctx[i];
381 av_freep(&sl->dc_val_base);
382 av_freep(&sl->er.mb_index2xy);
383 av_freep(&sl->er.error_status_table);
384 av_freep(&sl->er.er_temp_buffer);
386 av_freep(&sl->bipred_scratchpad);
387 av_freep(&sl->edge_emu_buffer);
388 av_freep(&sl->top_borders[0]);
389 av_freep(&sl->top_borders[1]);
391 sl->bipred_scratchpad_allocated = 0;
392 sl->edge_emu_buffer_allocated = 0;
393 sl->top_borders_allocated[0] = 0;
394 sl->top_borders_allocated[1] = 0;
398 int ff_h264_alloc_tables(H264Context *h)
400 const int big_mb_num = h->mb_stride * (h->mb_height + 1);
401 const int row_mb_num = 2*h->mb_stride*FFMAX(h->avctx->thread_count, 1);
404 FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->intra4x4_pred_mode,
405 row_mb_num, 8 * sizeof(uint8_t), fail)
406 h->slice_ctx[0].intra4x4_pred_mode = h->intra4x4_pred_mode;
408 FF_ALLOCZ_OR_GOTO(h->avctx, h->non_zero_count,
409 big_mb_num * 48 * sizeof(uint8_t), fail)
410 FF_ALLOCZ_OR_GOTO(h->avctx, h->slice_table_base,
411 (big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base), fail)
412 FF_ALLOCZ_OR_GOTO(h->avctx, h->cbp_table,
413 big_mb_num * sizeof(uint16_t), fail)
414 FF_ALLOCZ_OR_GOTO(h->avctx, h->chroma_pred_mode_table,
415 big_mb_num * sizeof(uint8_t), fail)
416 FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->mvd_table[0],
417 row_mb_num, 16 * sizeof(uint8_t), fail);
418 FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->mvd_table[1],
419 row_mb_num, 16 * sizeof(uint8_t), fail);
420 h->slice_ctx[0].mvd_table[0] = h->mvd_table[0];
421 h->slice_ctx[0].mvd_table[1] = h->mvd_table[1];
423 FF_ALLOCZ_OR_GOTO(h->avctx, h->direct_table,
424 4 * big_mb_num * sizeof(uint8_t), fail);
425 FF_ALLOCZ_OR_GOTO(h->avctx, h->list_counts,
426 big_mb_num * sizeof(uint8_t), fail)
428 memset(h->slice_table_base, -1,
429 (big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base));
430 h->slice_table = h->slice_table_base + h->mb_stride * 2 + 1;
432 FF_ALLOCZ_OR_GOTO(h->avctx, h->mb2b_xy,
433 big_mb_num * sizeof(uint32_t), fail);
434 FF_ALLOCZ_OR_GOTO(h->avctx, h->mb2br_xy,
435 big_mb_num * sizeof(uint32_t), fail);
436 for (y = 0; y < h->mb_height; y++)
437 for (x = 0; x < h->mb_width; x++) {
438 const int mb_xy = x + y * h->mb_stride;
439 const int b_xy = 4 * x + 4 * y * h->b_stride;
441 h->mb2b_xy[mb_xy] = b_xy;
442 h->mb2br_xy[mb_xy] = 8 * (FMO ? mb_xy : (mb_xy % (2 * h->mb_stride)));
445 if (!h->dequant4_coeff[0])
446 ff_h264_init_dequant_tables(h);
451 ff_h264_free_tables(h);
452 return AVERROR(ENOMEM);
457 * Allocate buffers which are not shared amongst multiple threads.
459 int ff_h264_slice_context_init(H264Context *h, H264SliceContext *sl)
461 ERContext *er = &sl->er;
462 int mb_array_size = h->mb_height * h->mb_stride;
463 int y_size = (2 * h->mb_width + 1) * (2 * h->mb_height + 1);
464 int c_size = h->mb_stride * (h->mb_height + 1);
465 int yc_size = y_size + 2 * c_size;
468 sl->ref_cache[0][scan8[5] + 1] =
469 sl->ref_cache[0][scan8[7] + 1] =
470 sl->ref_cache[0][scan8[13] + 1] =
471 sl->ref_cache[1][scan8[5] + 1] =
472 sl->ref_cache[1][scan8[7] + 1] =
473 sl->ref_cache[1][scan8[13] + 1] = PART_NOT_AVAILABLE;
475 if (sl != h->slice_ctx) {
476 memset(er, 0, sizeof(*er));
478 if (CONFIG_ERROR_RESILIENCE) {
481 er->avctx = h->avctx;
482 er->decode_mb = h264_er_decode_mb;
484 er->quarter_sample = 1;
486 er->mb_num = h->mb_num;
487 er->mb_width = h->mb_width;
488 er->mb_height = h->mb_height;
489 er->mb_stride = h->mb_stride;
490 er->b8_stride = h->mb_width * 2 + 1;
492 // error resilience code looks cleaner with this
493 FF_ALLOCZ_OR_GOTO(h->avctx, er->mb_index2xy,
494 (h->mb_num + 1) * sizeof(int), fail);
496 for (y = 0; y < h->mb_height; y++)
497 for (x = 0; x < h->mb_width; x++)
498 er->mb_index2xy[x + y * h->mb_width] = x + y * h->mb_stride;
500 er->mb_index2xy[h->mb_height * h->mb_width] = (h->mb_height - 1) *
501 h->mb_stride + h->mb_width;
503 FF_ALLOCZ_OR_GOTO(h->avctx, er->error_status_table,
504 mb_array_size * sizeof(uint8_t), fail);
506 FF_ALLOC_OR_GOTO(h->avctx, er->er_temp_buffer,
507 h->mb_height * h->mb_stride, fail);
509 FF_ALLOCZ_OR_GOTO(h->avctx, sl->dc_val_base,
510 yc_size * sizeof(int16_t), fail);
511 er->dc_val[0] = sl->dc_val_base + h->mb_width * 2 + 2;
512 er->dc_val[1] = sl->dc_val_base + y_size + h->mb_stride + 1;
513 er->dc_val[2] = er->dc_val[1] + c_size;
514 for (i = 0; i < yc_size; i++)
515 sl->dc_val_base[i] = 1024;
521 return AVERROR(ENOMEM); // ff_h264_free_tables will clean up for us
524 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size,
525 int parse_extradata);
527 int ff_h264_decode_extradata(H264Context *h, const uint8_t *buf, int size)
529 AVCodecContext *avctx = h->avctx;
532 if (!buf || size <= 0)
537 const unsigned char *p = buf;
542 av_log(avctx, AV_LOG_ERROR,
543 "avcC %d too short\n", size);
544 return AVERROR_INVALIDDATA;
546 /* sps and pps in the avcC always have length coded with 2 bytes,
547 * so put a fake nal_length_size = 2 while parsing them */
548 h->nal_length_size = 2;
549 // Decode sps from avcC
550 cnt = *(p + 5) & 0x1f; // Number of sps
552 for (i = 0; i < cnt; i++) {
553 nalsize = AV_RB16(p) + 2;
554 if(nalsize > size - (p-buf))
555 return AVERROR_INVALIDDATA;
556 ret = decode_nal_units(h, p, nalsize, 1);
558 av_log(avctx, AV_LOG_ERROR,
559 "Decoding sps %d from avcC failed\n", i);
564 // Decode pps from avcC
565 cnt = *(p++); // Number of pps
566 for (i = 0; i < cnt; i++) {
567 nalsize = AV_RB16(p) + 2;
568 if(nalsize > size - (p-buf))
569 return AVERROR_INVALIDDATA;
570 ret = decode_nal_units(h, p, nalsize, 1);
572 av_log(avctx, AV_LOG_ERROR,
573 "Decoding pps %d from avcC failed\n", i);
578 // Store right nal length size that will be used to parse all other nals
579 h->nal_length_size = (buf[4] & 0x03) + 1;
582 ret = decode_nal_units(h, buf, size, 1);
589 static int h264_init_context(AVCodecContext *avctx, H264Context *h)
594 h->dequant_coeff_pps = -1;
595 h->current_sps_id = -1;
596 h->cur_chroma_format_idc = -1;
598 h->picture_structure = PICT_FRAME;
599 h->slice_context_count = 1;
600 h->workaround_bugs = avctx->workaround_bugs;
601 h->flags = avctx->flags;
602 h->prev_poc_msb = 1 << 16;
604 h->recovery_frame = -1;
605 h->frame_recovered = 0;
606 h->prev_frame_num = -1;
607 h->sei_fpa.frame_packing_arrangement_cancel_flag = -1;
609 h->next_outputed_poc = INT_MIN;
610 for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
611 h->last_pocs[i] = INT_MIN;
613 ff_h264_reset_sei(h);
615 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
617 h->nb_slice_ctx = (avctx->active_thread_type & FF_THREAD_SLICE) ? H264_MAX_THREADS : 1;
618 h->slice_ctx = av_mallocz_array(h->nb_slice_ctx, sizeof(*h->slice_ctx));
621 return AVERROR(ENOMEM);
624 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
625 h->DPB[i].f = av_frame_alloc();
627 return AVERROR(ENOMEM);
630 h->cur_pic.f = av_frame_alloc();
632 return AVERROR(ENOMEM);
634 h->last_pic_for_ec.f = av_frame_alloc();
635 if (!h->last_pic_for_ec.f)
636 return AVERROR(ENOMEM);
638 for (i = 0; i < h->nb_slice_ctx; i++)
639 h->slice_ctx[i].h264 = h;
644 av_cold int ff_h264_decode_init(AVCodecContext *avctx)
646 H264Context *h = avctx->priv_data;
649 ret = h264_init_context(avctx, h);
654 if (!avctx->has_b_frames)
657 ff_h264_decode_init_vlc();
659 ff_init_cabac_states();
661 if (avctx->codec_id == AV_CODEC_ID_H264) {
662 if (avctx->ticks_per_frame == 1) {
663 if(h->avctx->time_base.den < INT_MAX/2) {
664 h->avctx->time_base.den *= 2;
666 h->avctx->time_base.num /= 2;
668 avctx->ticks_per_frame = 2;
671 if (avctx->extradata_size > 0 && avctx->extradata) {
672 ret = ff_h264_decode_extradata(h, avctx->extradata, avctx->extradata_size);
674 ff_h264_free_context(h);
679 if (h->sps.bitstream_restriction_flag &&
680 h->avctx->has_b_frames < h->sps.num_reorder_frames) {
681 h->avctx->has_b_frames = h->sps.num_reorder_frames;
685 avctx->internal->allocate_progress = 1;
687 ff_h264_flush_change(h);
689 if (h->enable_er < 0 && (avctx->active_thread_type & FF_THREAD_SLICE))
692 if (h->enable_er && (avctx->active_thread_type & FF_THREAD_SLICE)) {
693 av_log(avctx, AV_LOG_WARNING,
694 "Error resilience with slice threads is enabled. It is unsafe and unsupported and may crash. "
695 "Use it at your own risk\n");
701 static int decode_init_thread_copy(AVCodecContext *avctx)
703 H264Context *h = avctx->priv_data;
706 if (!avctx->internal->is_copy)
709 memset(h, 0, sizeof(*h));
711 ret = h264_init_context(avctx, h);
715 h->context_initialized = 0;
721 * Run setup operations that must be run after slice header decoding.
722 * This includes finding the next displayed frame.
724 * @param h h264 master context
725 * @param setup_finished enough NALs have been read that we can call
726 * ff_thread_finish_setup()
728 static void decode_postinit(H264Context *h, int setup_finished)
730 H264Picture *out = h->cur_pic_ptr;
731 H264Picture *cur = h->cur_pic_ptr;
732 int i, pics, out_of_order, out_idx;
734 h->cur_pic_ptr->f->pict_type = h->pict_type;
736 if (h->next_output_pic)
739 if (cur->field_poc[0] == INT_MAX || cur->field_poc[1] == INT_MAX) {
740 /* FIXME: if we have two PAFF fields in one packet, we can't start
741 * the next thread here. If we have one field per packet, we can.
742 * The check in decode_nal_units() is not good enough to find this
743 * yet, so we assume the worst for now. */
744 // if (setup_finished)
745 // ff_thread_finish_setup(h->avctx);
746 if (cur->field_poc[0] == INT_MAX && cur->field_poc[1] == INT_MAX)
748 if (h->avctx->hwaccel || h->missing_fields <=1)
752 cur->f->interlaced_frame = 0;
753 cur->f->repeat_pict = 0;
755 /* Signal interlacing information externally. */
756 /* Prioritize picture timing SEI information over used
757 * decoding process if it exists. */
759 if (h->sps.pic_struct_present_flag) {
760 switch (h->sei_pic_struct) {
761 case SEI_PIC_STRUCT_FRAME:
763 case SEI_PIC_STRUCT_TOP_FIELD:
764 case SEI_PIC_STRUCT_BOTTOM_FIELD:
765 cur->f->interlaced_frame = 1;
767 case SEI_PIC_STRUCT_TOP_BOTTOM:
768 case SEI_PIC_STRUCT_BOTTOM_TOP:
769 if (FIELD_OR_MBAFF_PICTURE(h))
770 cur->f->interlaced_frame = 1;
772 // try to flag soft telecine progressive
773 cur->f->interlaced_frame = h->prev_interlaced_frame;
775 case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
776 case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
777 /* Signal the possibility of telecined film externally
778 * (pic_struct 5,6). From these hints, let the applications
779 * decide if they apply deinterlacing. */
780 cur->f->repeat_pict = 1;
782 case SEI_PIC_STRUCT_FRAME_DOUBLING:
783 cur->f->repeat_pict = 2;
785 case SEI_PIC_STRUCT_FRAME_TRIPLING:
786 cur->f->repeat_pict = 4;
790 if ((h->sei_ct_type & 3) &&
791 h->sei_pic_struct <= SEI_PIC_STRUCT_BOTTOM_TOP)
792 cur->f->interlaced_frame = (h->sei_ct_type & (1 << 1)) != 0;
794 /* Derive interlacing flag from used decoding process. */
795 cur->f->interlaced_frame = FIELD_OR_MBAFF_PICTURE(h);
797 h->prev_interlaced_frame = cur->f->interlaced_frame;
799 if (cur->field_poc[0] != cur->field_poc[1]) {
800 /* Derive top_field_first from field pocs. */
801 cur->f->top_field_first = cur->field_poc[0] < cur->field_poc[1];
803 if (cur->f->interlaced_frame || h->sps.pic_struct_present_flag) {
804 /* Use picture timing SEI information. Even if it is a
805 * information of a past frame, better than nothing. */
806 if (h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM ||
807 h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM_TOP)
808 cur->f->top_field_first = 1;
810 cur->f->top_field_first = 0;
812 /* Most likely progressive */
813 cur->f->top_field_first = 0;
817 if (h->sei_frame_packing_present &&
818 h->frame_packing_arrangement_type >= 0 &&
819 h->frame_packing_arrangement_type <= 6 &&
820 h->content_interpretation_type > 0 &&
821 h->content_interpretation_type < 3) {
822 AVStereo3D *stereo = av_stereo3d_create_side_data(cur->f);
824 switch (h->frame_packing_arrangement_type) {
826 stereo->type = AV_STEREO3D_CHECKERBOARD;
829 stereo->type = AV_STEREO3D_COLUMNS;
832 stereo->type = AV_STEREO3D_LINES;
835 if (h->quincunx_subsampling)
836 stereo->type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
838 stereo->type = AV_STEREO3D_SIDEBYSIDE;
841 stereo->type = AV_STEREO3D_TOPBOTTOM;
844 stereo->type = AV_STEREO3D_FRAMESEQUENCE;
847 stereo->type = AV_STEREO3D_2D;
851 if (h->content_interpretation_type == 2)
852 stereo->flags = AV_STEREO3D_FLAG_INVERT;
856 if (h->sei_display_orientation_present &&
857 (h->sei_anticlockwise_rotation || h->sei_hflip || h->sei_vflip)) {
858 double angle = h->sei_anticlockwise_rotation * 360 / (double) (1 << 16);
859 AVFrameSideData *rotation = av_frame_new_side_data(cur->f,
860 AV_FRAME_DATA_DISPLAYMATRIX,
861 sizeof(int32_t) * 9);
863 av_display_rotation_set((int32_t *)rotation->data, angle);
864 av_display_matrix_flip((int32_t *)rotation->data,
865 h->sei_hflip, h->sei_vflip);
869 cur->mmco_reset = h->mmco_reset;
872 // FIXME do something with unavailable reference frames
874 /* Sort B-frames into display order */
876 if (h->sps.bitstream_restriction_flag &&
877 h->avctx->has_b_frames < h->sps.num_reorder_frames) {
878 h->avctx->has_b_frames = h->sps.num_reorder_frames;
882 if (h->avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT &&
883 !h->sps.bitstream_restriction_flag) {
884 h->avctx->has_b_frames = MAX_DELAYED_PIC_COUNT - 1;
888 for (i = 0; 1; i++) {
889 if(i == MAX_DELAYED_PIC_COUNT || cur->poc < h->last_pocs[i]){
891 h->last_pocs[i-1] = cur->poc;
894 h->last_pocs[i-1]= h->last_pocs[i];
897 out_of_order = MAX_DELAYED_PIC_COUNT - i;
898 if( cur->f->pict_type == AV_PICTURE_TYPE_B
899 || (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))
900 out_of_order = FFMAX(out_of_order, 1);
901 if (out_of_order == MAX_DELAYED_PIC_COUNT) {
902 av_log(h->avctx, AV_LOG_VERBOSE, "Invalid POC %d<%d\n", cur->poc, h->last_pocs[0]);
903 for (i = 1; i < MAX_DELAYED_PIC_COUNT; i++)
904 h->last_pocs[i] = INT_MIN;
905 h->last_pocs[0] = cur->poc;
907 } else if(h->avctx->has_b_frames < out_of_order && !h->sps.bitstream_restriction_flag){
908 av_log(h->avctx, AV_LOG_VERBOSE, "Increasing reorder buffer to %d\n", out_of_order);
909 h->avctx->has_b_frames = out_of_order;
914 while (h->delayed_pic[pics])
917 av_assert0(pics <= MAX_DELAYED_PIC_COUNT);
919 h->delayed_pic[pics++] = cur;
920 if (cur->reference == 0)
921 cur->reference = DELAYED_PIC_REF;
923 out = h->delayed_pic[0];
925 for (i = 1; h->delayed_pic[i] &&
926 !h->delayed_pic[i]->f->key_frame &&
927 !h->delayed_pic[i]->mmco_reset;
929 if (h->delayed_pic[i]->poc < out->poc) {
930 out = h->delayed_pic[i];
933 if (h->avctx->has_b_frames == 0 &&
934 (h->delayed_pic[0]->f->key_frame || h->delayed_pic[0]->mmco_reset))
935 h->next_outputed_poc = INT_MIN;
936 out_of_order = out->poc < h->next_outputed_poc;
938 if (out_of_order || pics > h->avctx->has_b_frames) {
939 out->reference &= ~DELAYED_PIC_REF;
940 // for frame threading, the owner must be the second field's thread or
941 // else the first thread can release the picture and reuse it unsafely
942 for (i = out_idx; h->delayed_pic[i]; i++)
943 h->delayed_pic[i] = h->delayed_pic[i + 1];
945 if (!out_of_order && pics > h->avctx->has_b_frames) {
946 h->next_output_pic = out;
947 if (out_idx == 0 && h->delayed_pic[0] && (h->delayed_pic[0]->f->key_frame || h->delayed_pic[0]->mmco_reset)) {
948 h->next_outputed_poc = INT_MIN;
950 h->next_outputed_poc = out->poc;
952 av_log(h->avctx, AV_LOG_DEBUG, "no picture %s\n", out_of_order ? "ooo" : "");
955 if (h->next_output_pic) {
956 if (h->next_output_pic->recovered) {
957 // We have reached an recovery point and all frames after it in
958 // display order are "recovered".
959 h->frame_recovered |= FRAME_RECOVERED_SEI;
961 h->next_output_pic->recovered |= !!(h->frame_recovered & FRAME_RECOVERED_SEI);
964 if (setup_finished && !h->avctx->hwaccel)
965 ff_thread_finish_setup(h->avctx);
968 int ff_pred_weight_table(H264Context *h, H264SliceContext *sl)
971 int luma_def, chroma_def;
974 sl->use_weight_chroma = 0;
975 sl->luma_log2_weight_denom = get_ue_golomb(&sl->gb);
976 if (h->sps.chroma_format_idc)
977 sl->chroma_log2_weight_denom = get_ue_golomb(&sl->gb);
979 if (sl->luma_log2_weight_denom > 7U) {
980 av_log(h->avctx, AV_LOG_ERROR, "luma_log2_weight_denom %d is out of range\n", sl->luma_log2_weight_denom);
981 sl->luma_log2_weight_denom = 0;
983 if (sl->chroma_log2_weight_denom > 7U) {
984 av_log(h->avctx, AV_LOG_ERROR, "chroma_log2_weight_denom %d is out of range\n", sl->chroma_log2_weight_denom);
985 sl->chroma_log2_weight_denom = 0;
988 luma_def = 1 << sl->luma_log2_weight_denom;
989 chroma_def = 1 << sl->chroma_log2_weight_denom;
991 for (list = 0; list < 2; list++) {
992 sl->luma_weight_flag[list] = 0;
993 sl->chroma_weight_flag[list] = 0;
994 for (i = 0; i < sl->ref_count[list]; i++) {
995 int luma_weight_flag, chroma_weight_flag;
997 luma_weight_flag = get_bits1(&sl->gb);
998 if (luma_weight_flag) {
999 sl->luma_weight[i][list][0] = get_se_golomb(&sl->gb);
1000 sl->luma_weight[i][list][1] = get_se_golomb(&sl->gb);
1001 if (sl->luma_weight[i][list][0] != luma_def ||
1002 sl->luma_weight[i][list][1] != 0) {
1004 sl->luma_weight_flag[list] = 1;
1007 sl->luma_weight[i][list][0] = luma_def;
1008 sl->luma_weight[i][list][1] = 0;
1011 if (h->sps.chroma_format_idc) {
1012 chroma_weight_flag = get_bits1(&sl->gb);
1013 if (chroma_weight_flag) {
1015 for (j = 0; j < 2; j++) {
1016 sl->chroma_weight[i][list][j][0] = get_se_golomb(&sl->gb);
1017 sl->chroma_weight[i][list][j][1] = get_se_golomb(&sl->gb);
1018 if (sl->chroma_weight[i][list][j][0] != chroma_def ||
1019 sl->chroma_weight[i][list][j][1] != 0) {
1020 sl->use_weight_chroma = 1;
1021 sl->chroma_weight_flag[list] = 1;
1026 for (j = 0; j < 2; j++) {
1027 sl->chroma_weight[i][list][j][0] = chroma_def;
1028 sl->chroma_weight[i][list][j][1] = 0;
1033 if (sl->slice_type_nos != AV_PICTURE_TYPE_B)
1036 sl->use_weight = sl->use_weight || sl->use_weight_chroma;
1041 * instantaneous decoder refresh.
1043 static void idr(H264Context *h)
1046 ff_h264_remove_all_refs(h);
1048 h->prev_frame_num_offset = 0;
1049 h->prev_poc_msb = 1<<16;
1050 h->prev_poc_lsb = 0;
1051 for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
1052 h->last_pocs[i] = INT_MIN;
1055 /* forget old pics after a seek */
1056 void ff_h264_flush_change(H264Context *h)
1060 h->next_outputed_poc = INT_MIN;
1061 h->prev_interlaced_frame = 1;
1064 h->prev_frame_num = -1;
1065 if (h->cur_pic_ptr) {
1066 h->cur_pic_ptr->reference = 0;
1067 for (j=i=0; h->delayed_pic[i]; i++)
1068 if (h->delayed_pic[i] != h->cur_pic_ptr)
1069 h->delayed_pic[j++] = h->delayed_pic[i];
1070 h->delayed_pic[j] = NULL;
1072 ff_h264_unref_picture(h, &h->last_pic_for_ec);
1075 ff_h264_reset_sei(h);
1076 h->recovery_frame = -1;
1077 h->frame_recovered = 0;
1078 h->current_slice = 0;
1080 for (i = 0; i < h->nb_slice_ctx; i++)
1081 h->slice_ctx[i].list_count = 0;
1084 /* forget old pics after a seek */
1085 static void flush_dpb(AVCodecContext *avctx)
1087 H264Context *h = avctx->priv_data;
1090 memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
1092 ff_h264_flush_change(h);
1094 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++)
1095 ff_h264_unref_picture(h, &h->DPB[i]);
1096 h->cur_pic_ptr = NULL;
1097 ff_h264_unref_picture(h, &h->cur_pic);
1101 ff_h264_free_tables(h);
1102 h->context_initialized = 0;
1105 int ff_init_poc(H264Context *h, int pic_field_poc[2], int *pic_poc)
1107 const int max_frame_num = 1 << h->sps.log2_max_frame_num;
1110 h->frame_num_offset = h->prev_frame_num_offset;
1111 if (h->frame_num < h->prev_frame_num)
1112 h->frame_num_offset += max_frame_num;
1114 if (h->sps.poc_type == 0) {
1115 const int max_poc_lsb = 1 << h->sps.log2_max_poc_lsb;
1117 if (h->poc_lsb < h->prev_poc_lsb &&
1118 h->prev_poc_lsb - h->poc_lsb >= max_poc_lsb / 2)
1119 h->poc_msb = h->prev_poc_msb + max_poc_lsb;
1120 else if (h->poc_lsb > h->prev_poc_lsb &&
1121 h->prev_poc_lsb - h->poc_lsb < -max_poc_lsb / 2)
1122 h->poc_msb = h->prev_poc_msb - max_poc_lsb;
1124 h->poc_msb = h->prev_poc_msb;
1126 field_poc[1] = h->poc_msb + h->poc_lsb;
1127 if (h->picture_structure == PICT_FRAME)
1128 field_poc[1] += h->delta_poc_bottom;
1129 } else if (h->sps.poc_type == 1) {
1130 int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
1133 if (h->sps.poc_cycle_length != 0)
1134 abs_frame_num = h->frame_num_offset + h->frame_num;
1138 if (h->nal_ref_idc == 0 && abs_frame_num > 0)
1141 expected_delta_per_poc_cycle = 0;
1142 for (i = 0; i < h->sps.poc_cycle_length; i++)
1143 // FIXME integrate during sps parse
1144 expected_delta_per_poc_cycle += h->sps.offset_for_ref_frame[i];
1146 if (abs_frame_num > 0) {
1147 int poc_cycle_cnt = (abs_frame_num - 1) / h->sps.poc_cycle_length;
1148 int frame_num_in_poc_cycle = (abs_frame_num - 1) % h->sps.poc_cycle_length;
1150 expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
1151 for (i = 0; i <= frame_num_in_poc_cycle; i++)
1152 expectedpoc = expectedpoc + h->sps.offset_for_ref_frame[i];
1156 if (h->nal_ref_idc == 0)
1157 expectedpoc = expectedpoc + h->sps.offset_for_non_ref_pic;
1159 field_poc[0] = expectedpoc + h->delta_poc[0];
1160 field_poc[1] = field_poc[0] + h->sps.offset_for_top_to_bottom_field;
1162 if (h->picture_structure == PICT_FRAME)
1163 field_poc[1] += h->delta_poc[1];
1165 int poc = 2 * (h->frame_num_offset + h->frame_num);
1167 if (!h->nal_ref_idc)
1174 if (h->picture_structure != PICT_BOTTOM_FIELD)
1175 pic_field_poc[0] = field_poc[0];
1176 if (h->picture_structure != PICT_TOP_FIELD)
1177 pic_field_poc[1] = field_poc[1];
1178 *pic_poc = FFMIN(pic_field_poc[0], pic_field_poc[1]);
1184 * Compute profile from profile_idc and constraint_set?_flags.
1188 * @return profile as defined by FF_PROFILE_H264_*
1190 int ff_h264_get_profile(SPS *sps)
1192 int profile = sps->profile_idc;
1194 switch (sps->profile_idc) {
1195 case FF_PROFILE_H264_BASELINE:
1196 // constraint_set1_flag set to 1
1197 profile |= (sps->constraint_set_flags & 1 << 1) ? FF_PROFILE_H264_CONSTRAINED : 0;
1199 case FF_PROFILE_H264_HIGH_10:
1200 case FF_PROFILE_H264_HIGH_422:
1201 case FF_PROFILE_H264_HIGH_444_PREDICTIVE:
1202 // constraint_set3_flag set to 1
1203 profile |= (sps->constraint_set_flags & 1 << 3) ? FF_PROFILE_H264_INTRA : 0;
1210 int ff_set_ref_count(H264Context *h, H264SliceContext *sl)
1212 int ref_count[2], list_count;
1213 int num_ref_idx_active_override_flag;
1215 // set defaults, might be overridden a few lines later
1216 ref_count[0] = h->pps.ref_count[0];
1217 ref_count[1] = h->pps.ref_count[1];
1219 if (sl->slice_type_nos != AV_PICTURE_TYPE_I) {
1221 max[0] = max[1] = h->picture_structure == PICT_FRAME ? 15 : 31;
1223 if (sl->slice_type_nos == AV_PICTURE_TYPE_B)
1224 sl->direct_spatial_mv_pred = get_bits1(&sl->gb);
1225 num_ref_idx_active_override_flag = get_bits1(&sl->gb);
1227 if (num_ref_idx_active_override_flag) {
1228 ref_count[0] = get_ue_golomb(&sl->gb) + 1;
1229 if (sl->slice_type_nos == AV_PICTURE_TYPE_B) {
1230 ref_count[1] = get_ue_golomb(&sl->gb) + 1;
1232 // full range is spec-ok in this case, even for frames
1236 if (ref_count[0]-1 > max[0] || ref_count[1]-1 > max[1]){
1237 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]);
1238 sl->ref_count[0] = sl->ref_count[1] = 0;
1240 return AVERROR_INVALIDDATA;
1243 if (sl->slice_type_nos == AV_PICTURE_TYPE_B)
1249 ref_count[0] = ref_count[1] = 0;
1252 if (list_count != sl->list_count ||
1253 ref_count[0] != sl->ref_count[0] ||
1254 ref_count[1] != sl->ref_count[1]) {
1255 sl->ref_count[0] = ref_count[0];
1256 sl->ref_count[1] = ref_count[1];
1257 sl->list_count = list_count;
1264 static const uint8_t start_code[] = { 0x00, 0x00, 0x01 };
1266 static int get_bit_length(H264Context *h, const uint8_t *buf,
1267 const uint8_t *ptr, int dst_length,
1268 int i, int next_avc)
1270 if ((h->workaround_bugs & FF_BUG_AUTODETECT) && i + 3 < next_avc &&
1271 buf[i] == 0x00 && buf[i + 1] == 0x00 &&
1272 buf[i + 2] == 0x01 && buf[i + 3] == 0xE0)
1273 h->workaround_bugs |= FF_BUG_TRUNCATED;
1275 if (!(h->workaround_bugs & FF_BUG_TRUNCATED))
1276 while (dst_length > 0 && ptr[dst_length - 1] == 0)
1282 return 8 * dst_length - decode_rbsp_trailing(h, ptr + dst_length - 1);
1285 static int get_last_needed_nal(H264Context *h, const uint8_t *buf, int buf_size)
1287 int next_avc = h->is_avc ? 0 : buf_size;
1290 int nals_needed = 0;
1291 int first_slice = 0;
1296 int dst_length, bit_length, consumed;
1299 if (buf_index >= next_avc) {
1300 nalsize = get_avc_nalsize(h, buf, buf_size, &buf_index);
1303 next_avc = buf_index + nalsize;
1305 buf_index = find_start_code(buf, buf_size, buf_index, next_avc);
1306 if (buf_index >= buf_size)
1308 if (buf_index >= next_avc)
1312 ptr = ff_h264_decode_nal(h, &h->slice_ctx[0], buf + buf_index, &dst_length, &consumed,
1313 next_avc - buf_index);
1315 if (!ptr || dst_length < 0)
1316 return AVERROR_INVALIDDATA;
1318 buf_index += consumed;
1320 bit_length = get_bit_length(h, buf, ptr, dst_length,
1321 buf_index, next_avc);
1324 /* packets can sometimes contain multiple PPS/SPS,
1325 * e.g. two PAFF field pictures in one packet, or a demuxer
1326 * which splits NALs strangely if so, when frame threading we
1327 * can't start the next thread until we've read all of them */
1328 switch (h->nal_unit_type) {
1331 nals_needed = nal_index;
1336 init_get_bits(&gb, ptr, bit_length);
1337 if (!get_ue_golomb(&gb) ||
1339 first_slice != h->nal_unit_type)
1340 nals_needed = nal_index;
1342 first_slice = h->nal_unit_type;
1349 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size,
1350 int parse_extradata)
1352 AVCodecContext *const avctx = h->avctx;
1353 H264SliceContext *sl;
1355 unsigned context_count;
1357 int nals_needed = 0; ///< number of NALs that need decoding before the next frame thread starts
1362 h->nal_unit_type= 0;
1364 if(!h->slice_context_count)
1365 h->slice_context_count= 1;
1366 h->max_contexts = h->slice_context_count;
1367 if (!(avctx->flags2 & CODEC_FLAG2_CHUNKS)) {
1368 h->current_slice = 0;
1369 if (!h->first_field)
1370 h->cur_pic_ptr = NULL;
1371 ff_h264_reset_sei(h);
1374 if (h->nal_length_size == 4) {
1375 if (buf_size > 8 && AV_RB32(buf) == 1 && AV_RB32(buf+5) > (unsigned)buf_size) {
1377 }else if(buf_size > 3 && AV_RB32(buf) > 1 && AV_RB32(buf) <= (unsigned)buf_size)
1381 if (avctx->active_thread_type & FF_THREAD_FRAME)
1382 nals_needed = get_last_needed_nal(h, buf, buf_size);
1387 next_avc = h->is_avc ? 0 : buf_size;
1397 if (buf_index >= next_avc) {
1398 nalsize = get_avc_nalsize(h, buf, buf_size, &buf_index);
1401 next_avc = buf_index + nalsize;
1403 buf_index = find_start_code(buf, buf_size, buf_index, next_avc);
1404 if (buf_index >= buf_size)
1406 if (buf_index >= next_avc)
1410 sl = &h->slice_ctx[context_count];
1412 ptr = ff_h264_decode_nal(h, sl, buf + buf_index, &dst_length,
1413 &consumed, next_avc - buf_index);
1414 if (!ptr || dst_length < 0) {
1419 bit_length = get_bit_length(h, buf, ptr, dst_length,
1420 buf_index + consumed, next_avc);
1422 if (h->avctx->debug & FF_DEBUG_STARTCODE)
1423 av_log(h->avctx, AV_LOG_DEBUG,
1424 "NAL %d/%d at %d/%d length %d\n",
1425 h->nal_unit_type, h->nal_ref_idc, buf_index, buf_size, dst_length);
1427 if (h->is_avc && (nalsize != consumed) && nalsize)
1428 av_log(h->avctx, AV_LOG_DEBUG,
1429 "AVC: Consumed only %d bytes instead of %d\n",
1432 buf_index += consumed;
1435 if (avctx->skip_frame >= AVDISCARD_NONREF &&
1436 h->nal_ref_idc == 0 &&
1437 h->nal_unit_type != NAL_SEI)
1441 /* Ignore per frame NAL unit type during extradata
1442 * parsing. Decoding slices is not possible in codec init
1444 if (parse_extradata) {
1445 switch (h->nal_unit_type) {
1451 av_log(h->avctx, AV_LOG_WARNING,
1452 "Ignoring NAL %d in global header/extradata\n",
1454 // fall through to next case
1455 case NAL_AUXILIARY_SLICE:
1456 h->nal_unit_type = NAL_FF_IGNORE;
1462 switch (h->nal_unit_type) {
1464 if ((ptr[0] & 0xFC) == 0x98) {
1465 av_log(h->avctx, AV_LOG_ERROR, "Invalid inter IDR frame\n");
1466 h->next_outputed_poc = INT_MIN;
1470 if (h->nal_unit_type != NAL_IDR_SLICE) {
1471 av_log(h->avctx, AV_LOG_ERROR,
1472 "Invalid mix of idr and non-idr slices\n");
1477 if (h->current_slice && (avctx->active_thread_type & FF_THREAD_SLICE)) {
1478 av_log(h, AV_LOG_ERROR, "invalid mixed IDR / non IDR frames cannot be decoded in slice multithreading mode\n");
1479 ret = AVERROR_INVALIDDATA;
1482 idr(h); // FIXME ensure we don't lose some frames if there is reordering
1485 h->has_recovery_point = 1;
1487 init_get_bits(&sl->gb, ptr, bit_length);
1489 if ( nals_needed >= nal_index
1490 || (!(avctx->active_thread_type & FF_THREAD_FRAME) && !context_count))
1493 if ((err = ff_h264_decode_slice_header(h, sl)))
1496 if (h->sei_recovery_frame_cnt >= 0) {
1497 if (h->frame_num != h->sei_recovery_frame_cnt || sl->slice_type_nos != AV_PICTURE_TYPE_I)
1498 h->valid_recovery_point = 1;
1500 if ( h->recovery_frame < 0
1501 || av_mod_uintp2(h->recovery_frame - h->frame_num, h->sps.log2_max_frame_num) > h->sei_recovery_frame_cnt) {
1502 h->recovery_frame = av_mod_uintp2(h->frame_num + h->sei_recovery_frame_cnt, h->sps.log2_max_frame_num);
1504 if (!h->valid_recovery_point)
1505 h->recovery_frame = h->frame_num;
1509 h->cur_pic_ptr->f->key_frame |=
1510 (h->nal_unit_type == NAL_IDR_SLICE);
1512 if (h->nal_unit_type == NAL_IDR_SLICE ||
1513 h->recovery_frame == h->frame_num) {
1514 h->recovery_frame = -1;
1515 h->cur_pic_ptr->recovered = 1;
1517 // If we have an IDR, all frames after it in decoded order are
1519 if (h->nal_unit_type == NAL_IDR_SLICE)
1520 h->frame_recovered |= FRAME_RECOVERED_IDR;
1521 h->frame_recovered |= 3*!!(avctx->flags2 & CODEC_FLAG2_SHOW_ALL);
1522 h->frame_recovered |= 3*!!(avctx->flags & CODEC_FLAG_OUTPUT_CORRUPT);
1524 h->cur_pic_ptr->recovered |= h->frame_recovered;
1526 h->cur_pic_ptr->recovered |= !!(h->frame_recovered & FRAME_RECOVERED_IDR);
1529 if (h->current_slice == 1) {
1530 if (!(avctx->flags2 & CODEC_FLAG2_CHUNKS))
1531 decode_postinit(h, nal_index >= nals_needed);
1533 if (h->avctx->hwaccel &&
1534 (ret = h->avctx->hwaccel->start_frame(h->avctx, buf, buf_size)) < 0)
1536 if (CONFIG_H264_VDPAU_DECODER &&
1537 h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU)
1538 ff_vdpau_h264_picture_start(h);
1541 if (sl->redundant_pic_count == 0) {
1542 if (avctx->hwaccel) {
1543 ret = avctx->hwaccel->decode_slice(avctx,
1544 &buf[buf_index - consumed],
1548 } else if (CONFIG_H264_VDPAU_DECODER &&
1549 h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU) {
1550 ff_vdpau_add_data_chunk(h->cur_pic_ptr->f->data[0],
1552 sizeof(start_code));
1553 ff_vdpau_add_data_chunk(h->cur_pic_ptr->f->data[0],
1554 &buf[buf_index - consumed],
1563 avpriv_request_sample(avctx, "data partitioning");
1566 init_get_bits(&h->gb, ptr, bit_length);
1567 ret = ff_h264_decode_sei(h);
1568 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1572 init_get_bits(&h->gb, ptr, bit_length);
1573 if (ff_h264_decode_seq_parameter_set(h, 0) >= 0)
1575 if (h->is_avc ? nalsize : 1) {
1576 av_log(h->avctx, AV_LOG_DEBUG,
1577 "SPS decoding failure, trying again with the complete NAL\n");
1579 av_assert0(next_avc - buf_index + consumed == nalsize);
1580 if ((next_avc - buf_index + consumed - 1) >= INT_MAX/8)
1582 init_get_bits(&h->gb, &buf[buf_index + 1 - consumed],
1583 8*(next_avc - buf_index + consumed - 1));
1584 if (ff_h264_decode_seq_parameter_set(h, 0) >= 0)
1587 init_get_bits(&h->gb, ptr, bit_length);
1588 ff_h264_decode_seq_parameter_set(h, 1);
1592 init_get_bits(&h->gb, ptr, bit_length);
1593 ret = ff_h264_decode_picture_parameter_set(h, bit_length);
1594 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1598 case NAL_END_SEQUENCE:
1599 case NAL_END_STREAM:
1600 case NAL_FILLER_DATA:
1602 case NAL_AUXILIARY_SLICE:
1607 av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n",
1608 h->nal_unit_type, bit_length);
1611 if (context_count == h->max_contexts) {
1612 ret = ff_h264_execute_decode_slices(h, context_count);
1613 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1618 if (err < 0 || err == SLICE_SKIPED) {
1620 av_log(h->avctx, AV_LOG_ERROR, "decode_slice_header error\n");
1621 sl->ref_count[0] = sl->ref_count[1] = sl->list_count = 0;
1622 } else if (err == SLICE_SINGLETHREAD) {
1623 if (context_count > 1) {
1624 ret = ff_h264_execute_decode_slices(h, context_count - 1);
1625 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1629 /* Slice could not be decoded in parallel mode, restart. Note
1630 * that rbsp_buffer is not transferred, but since we no longer
1631 * run in parallel mode this should not be an issue. */
1632 sl = &h->slice_ctx[0];
1637 if (context_count) {
1638 ret = ff_h264_execute_decode_slices(h, context_count);
1639 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1646 if (h->cur_pic_ptr && !h->droppable) {
1647 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
1648 h->picture_structure == PICT_BOTTOM_FIELD);
1651 return (ret < 0) ? ret : buf_index;
1655 * Return the number of bytes consumed for building the current frame.
1657 static int get_consumed_bytes(int pos, int buf_size)
1660 pos = 1; // avoid infinite loops (I doubt that is needed but...)
1661 if (pos + 10 > buf_size)
1662 pos = buf_size; // oops ;)
1667 static int output_frame(H264Context *h, AVFrame *dst, H264Picture *srcp)
1669 AVFrame *src = srcp->f;
1670 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(src->format);
1672 int ret = av_frame_ref(dst, src);
1676 av_dict_set(&dst->metadata, "stereo_mode", ff_h264_sei_stereo_mode(h), 0);
1678 if (srcp->sei_recovery_frame_cnt == 0)
1683 for (i = 0; i < desc->nb_components; i++) {
1684 int hshift = (i > 0) ? desc->log2_chroma_w : 0;
1685 int vshift = (i > 0) ? desc->log2_chroma_h : 0;
1686 int off = ((srcp->crop_left >> hshift) << h->pixel_shift) +
1687 (srcp->crop_top >> vshift) * dst->linesize[i];
1688 dst->data[i] += off;
1693 static int is_extra(const uint8_t *buf, int buf_size)
1695 int cnt= buf[5]&0x1f;
1696 const uint8_t *p= buf+6;
1698 int nalsize= AV_RB16(p) + 2;
1699 if(nalsize > buf_size - (p-buf) || p[2]!=0x67)
1707 int nalsize= AV_RB16(p) + 2;
1708 if(nalsize > buf_size - (p-buf) || p[2]!=0x68)
1715 static int h264_decode_frame(AVCodecContext *avctx, void *data,
1716 int *got_frame, AVPacket *avpkt)
1718 const uint8_t *buf = avpkt->data;
1719 int buf_size = avpkt->size;
1720 H264Context *h = avctx->priv_data;
1721 AVFrame *pict = data;
1727 h->flags = avctx->flags;
1729 ff_h264_unref_picture(h, &h->last_pic_for_ec);
1731 /* end of stream, output what is still in the buffers */
1732 if (buf_size == 0) {
1735 h->cur_pic_ptr = NULL;
1738 // FIXME factorize this with the output code below
1739 out = h->delayed_pic[0];
1742 h->delayed_pic[i] &&
1743 !h->delayed_pic[i]->f->key_frame &&
1744 !h->delayed_pic[i]->mmco_reset;
1746 if (h->delayed_pic[i]->poc < out->poc) {
1747 out = h->delayed_pic[i];
1751 for (i = out_idx; h->delayed_pic[i]; i++)
1752 h->delayed_pic[i] = h->delayed_pic[i + 1];
1755 out->reference &= ~DELAYED_PIC_REF;
1756 ret = output_frame(h, pict, out);
1764 if (h->is_avc && av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, NULL)) {
1766 uint8_t *side = av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, &side_size);
1767 if (is_extra(side, side_size))
1768 ff_h264_decode_extradata(h, side, side_size);
1770 if(h->is_avc && buf_size >= 9 && buf[0]==1 && buf[2]==0 && (buf[4]&0xFC)==0xFC && (buf[5]&0x1F) && buf[8]==0x67){
1771 if (is_extra(buf, buf_size))
1772 return ff_h264_decode_extradata(h, buf, buf_size);
1775 buf_index = decode_nal_units(h, buf, buf_size, 0);
1777 return AVERROR_INVALIDDATA;
1779 if (!h->cur_pic_ptr && h->nal_unit_type == NAL_END_SEQUENCE) {
1780 av_assert0(buf_index <= buf_size);
1784 if (!(avctx->flags2 & CODEC_FLAG2_CHUNKS) && !h->cur_pic_ptr) {
1785 if (avctx->skip_frame >= AVDISCARD_NONREF ||
1786 buf_size >= 4 && !memcmp("Q264", buf, 4))
1788 av_log(avctx, AV_LOG_ERROR, "no frame!\n");
1789 return AVERROR_INVALIDDATA;
1792 if (!(avctx->flags2 & CODEC_FLAG2_CHUNKS) ||
1793 (h->mb_y >= h->mb_height && h->mb_height)) {
1794 if (avctx->flags2 & CODEC_FLAG2_CHUNKS)
1795 decode_postinit(h, 1);
1797 ff_h264_field_end(h, &h->slice_ctx[0], 0);
1799 /* Wait for second field. */
1801 if (h->next_output_pic && (
1802 h->next_output_pic->recovered)) {
1803 if (!h->next_output_pic->recovered)
1804 h->next_output_pic->f->flags |= AV_FRAME_FLAG_CORRUPT;
1806 if (!h->avctx->hwaccel &&
1807 (h->next_output_pic->field_poc[0] == INT_MAX ||
1808 h->next_output_pic->field_poc[1] == INT_MAX)
1811 AVFrame *f = h->next_output_pic->f;
1812 int field = h->next_output_pic->field_poc[0] == INT_MAX;
1813 uint8_t *dst_data[4];
1815 const uint8_t *src_data[4];
1817 av_log(h->avctx, AV_LOG_DEBUG, "Duplicating field %d to fill missing\n", field);
1819 for (p = 0; p<4; p++) {
1820 dst_data[p] = f->data[p] + (field^1)*f->linesize[p];
1821 src_data[p] = f->data[p] + field *f->linesize[p];
1822 linesizes[p] = 2*f->linesize[p];
1825 av_image_copy(dst_data, linesizes, src_data, linesizes,
1826 f->format, f->width, f->height>>1);
1829 ret = output_frame(h, pict, h->next_output_pic);
1833 if (CONFIG_MPEGVIDEO) {
1834 ff_print_debug_info2(h->avctx, pict, NULL,
1835 h->next_output_pic->mb_type,
1836 h->next_output_pic->qscale_table,
1837 h->next_output_pic->motion_val,
1839 h->mb_width, h->mb_height, h->mb_stride, 1);
1844 av_assert0(pict->buf[0] || !*got_frame);
1846 ff_h264_unref_picture(h, &h->last_pic_for_ec);
1848 return get_consumed_bytes(buf_index, buf_size);
1851 av_cold void ff_h264_free_context(H264Context *h)
1855 ff_h264_free_tables(h);
1857 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
1858 ff_h264_unref_picture(h, &h->DPB[i]);
1859 av_frame_free(&h->DPB[i].f);
1861 memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
1863 h->cur_pic_ptr = NULL;
1865 for (i = 0; i < h->nb_slice_ctx; i++)
1866 av_freep(&h->slice_ctx[i].rbsp_buffer);
1867 av_freep(&h->slice_ctx);
1868 h->nb_slice_ctx = 0;
1870 for (i = 0; i < MAX_SPS_COUNT; i++)
1871 av_freep(h->sps_buffers + i);
1873 for (i = 0; i < MAX_PPS_COUNT; i++)
1874 av_freep(h->pps_buffers + i);
1877 static av_cold int h264_decode_end(AVCodecContext *avctx)
1879 H264Context *h = avctx->priv_data;
1881 ff_h264_remove_all_refs(h);
1882 ff_h264_free_context(h);
1884 ff_h264_unref_picture(h, &h->cur_pic);
1885 av_frame_free(&h->cur_pic.f);
1886 ff_h264_unref_picture(h, &h->last_pic_for_ec);
1887 av_frame_free(&h->last_pic_for_ec.f);
1892 #define OFFSET(x) offsetof(H264Context, x)
1893 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1894 static const AVOption h264_options[] = {
1895 {"is_avc", "is avc", offsetof(H264Context, is_avc), FF_OPT_TYPE_INT, {.i64 = 0}, 0, 1, 0},
1896 {"nal_length_size", "nal_length_size", offsetof(H264Context, nal_length_size), FF_OPT_TYPE_INT, {.i64 = 0}, 0, 4, 0},
1897 { "enable_er", "Enable error resilience on damaged frames (unsafe)", OFFSET(enable_er), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VD },
1901 static const AVClass h264_class = {
1902 .class_name = "H264 Decoder",
1903 .item_name = av_default_item_name,
1904 .option = h264_options,
1905 .version = LIBAVUTIL_VERSION_INT,
1908 static const AVProfile profiles[] = {
1909 { FF_PROFILE_H264_BASELINE, "Baseline" },
1910 { FF_PROFILE_H264_CONSTRAINED_BASELINE, "Constrained Baseline" },
1911 { FF_PROFILE_H264_MAIN, "Main" },
1912 { FF_PROFILE_H264_EXTENDED, "Extended" },
1913 { FF_PROFILE_H264_HIGH, "High" },
1914 { FF_PROFILE_H264_HIGH_10, "High 10" },
1915 { FF_PROFILE_H264_HIGH_10_INTRA, "High 10 Intra" },
1916 { FF_PROFILE_H264_HIGH_422, "High 4:2:2" },
1917 { FF_PROFILE_H264_HIGH_422_INTRA, "High 4:2:2 Intra" },
1918 { FF_PROFILE_H264_HIGH_444, "High 4:4:4" },
1919 { FF_PROFILE_H264_HIGH_444_PREDICTIVE, "High 4:4:4 Predictive" },
1920 { FF_PROFILE_H264_HIGH_444_INTRA, "High 4:4:4 Intra" },
1921 { FF_PROFILE_H264_CAVLC_444, "CAVLC 4:4:4" },
1922 { FF_PROFILE_UNKNOWN },
1925 AVCodec ff_h264_decoder = {
1927 .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
1928 .type = AVMEDIA_TYPE_VIDEO,
1929 .id = AV_CODEC_ID_H264,
1930 .priv_data_size = sizeof(H264Context),
1931 .init = ff_h264_decode_init,
1932 .close = h264_decode_end,
1933 .decode = h264_decode_frame,
1934 .capabilities = /*CODEC_CAP_DRAW_HORIZ_BAND |*/ CODEC_CAP_DR1 |
1935 CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS |
1936 CODEC_CAP_FRAME_THREADS,
1938 .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
1939 .update_thread_context = ONLY_IF_THREADS_ENABLED(ff_h264_update_thread_context),
1940 .profiles = NULL_IF_CONFIG_SMALL(profiles),
1941 .priv_class = &h264_class,
1944 #if CONFIG_H264_VDPAU_DECODER
1945 static const AVClass h264_vdpau_class = {
1946 .class_name = "H264 VDPAU Decoder",
1947 .item_name = av_default_item_name,
1948 .option = h264_options,
1949 .version = LIBAVUTIL_VERSION_INT,
1952 AVCodec ff_h264_vdpau_decoder = {
1953 .name = "h264_vdpau",
1954 .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (VDPAU acceleration)"),
1955 .type = AVMEDIA_TYPE_VIDEO,
1956 .id = AV_CODEC_ID_H264,
1957 .priv_data_size = sizeof(H264Context),
1958 .init = ff_h264_decode_init,
1959 .close = h264_decode_end,
1960 .decode = h264_decode_frame,
1961 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,
1963 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_VDPAU_H264,
1965 .profiles = NULL_IF_CONFIG_SMALL(profiles),
1966 .priv_class = &h264_vdpau_class,