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"
37 #include "bytestream.h"
39 #include "cabac_functions.h"
40 #include "error_resilience.h"
43 #include "h2645_parse.h"
45 #include "h264chroma.h"
46 #include "h264_mvpred.h"
50 #include "mpegutils.h"
52 #include "rectangle.h"
54 #include "vdpau_compat.h"
56 static int h264_decode_end(AVCodecContext *avctx);
58 const uint16_t ff_h264_mb_sizes[4] = { 256, 384, 512, 768 };
60 int avpriv_h264_has_num_reorder_frames(AVCodecContext *avctx)
62 H264Context *h = avctx->priv_data;
63 return h && h->ps.sps ? h->ps.sps->num_reorder_frames : 0;
66 static void h264_er_decode_mb(void *opaque, int ref, int mv_dir, int mv_type,
68 int mb_x, int mb_y, int mb_intra, int mb_skipped)
70 H264Context *h = opaque;
71 H264SliceContext *sl = &h->slice_ctx[0];
75 sl->mb_xy = mb_x + mb_y * h->mb_stride;
76 memset(sl->non_zero_count_cache, 0, sizeof(sl->non_zero_count_cache));
78 /* FIXME: It is possible albeit uncommon that slice references
79 * differ between slices. We take the easy approach and ignore
80 * it for now. If this turns out to have any relevance in
81 * practice then correct remapping should be added. */
82 if (ref >= sl->ref_count[0])
84 if (!sl->ref_list[0][ref].data[0]) {
85 av_log(h->avctx, AV_LOG_DEBUG, "Reference not available for error concealing\n");
88 if ((sl->ref_list[0][ref].reference&3) != 3) {
89 av_log(h->avctx, AV_LOG_DEBUG, "Reference invalid\n");
92 fill_rectangle(&h->cur_pic.ref_index[0][4 * sl->mb_xy],
94 fill_rectangle(&sl->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
95 fill_rectangle(sl->mv_cache[0][scan8[0]], 4, 4, 8,
96 pack16to32((*mv)[0][0][0], (*mv)[0][0][1]), 4);
98 sl->mb_field_decoding_flag = 0;
99 ff_h264_hl_decode_mb(h, &h->slice_ctx[0]);
102 void ff_h264_draw_horiz_band(const H264Context *h, H264SliceContext *sl,
105 AVCodecContext *avctx = h->avctx;
106 const AVFrame *src = h->cur_pic.f;
107 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
108 int vshift = desc->log2_chroma_h;
109 const int field_pic = h->picture_structure != PICT_FRAME;
115 height = FFMIN(height, avctx->height - y);
117 if (field_pic && h->first_field && !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD))
120 if (avctx->draw_horiz_band) {
121 int offset[AV_NUM_DATA_POINTERS];
124 offset[0] = y * src->linesize[0];
126 offset[2] = (y >> vshift) * src->linesize[1];
127 for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
132 avctx->draw_horiz_band(avctx, src, offset,
133 y, h->picture_structure, height);
137 void ff_h264_free_tables(H264Context *h)
141 av_freep(&h->intra4x4_pred_mode);
142 av_freep(&h->chroma_pred_mode_table);
143 av_freep(&h->cbp_table);
144 av_freep(&h->mvd_table[0]);
145 av_freep(&h->mvd_table[1]);
146 av_freep(&h->direct_table);
147 av_freep(&h->non_zero_count);
148 av_freep(&h->slice_table_base);
149 h->slice_table = NULL;
150 av_freep(&h->list_counts);
152 av_freep(&h->mb2b_xy);
153 av_freep(&h->mb2br_xy);
155 av_buffer_pool_uninit(&h->qscale_table_pool);
156 av_buffer_pool_uninit(&h->mb_type_pool);
157 av_buffer_pool_uninit(&h->motion_val_pool);
158 av_buffer_pool_uninit(&h->ref_index_pool);
160 for (i = 0; i < h->nb_slice_ctx; i++) {
161 H264SliceContext *sl = &h->slice_ctx[i];
163 av_freep(&sl->dc_val_base);
164 av_freep(&sl->er.mb_index2xy);
165 av_freep(&sl->er.error_status_table);
166 av_freep(&sl->er.er_temp_buffer);
168 av_freep(&sl->bipred_scratchpad);
169 av_freep(&sl->edge_emu_buffer);
170 av_freep(&sl->top_borders[0]);
171 av_freep(&sl->top_borders[1]);
173 sl->bipred_scratchpad_allocated = 0;
174 sl->edge_emu_buffer_allocated = 0;
175 sl->top_borders_allocated[0] = 0;
176 sl->top_borders_allocated[1] = 0;
180 int ff_h264_alloc_tables(H264Context *h)
182 const int big_mb_num = h->mb_stride * (h->mb_height + 1);
183 const int row_mb_num = 2*h->mb_stride*FFMAX(h->avctx->thread_count, 1);
186 FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->intra4x4_pred_mode,
187 row_mb_num, 8 * sizeof(uint8_t), fail)
188 h->slice_ctx[0].intra4x4_pred_mode = h->intra4x4_pred_mode;
190 FF_ALLOCZ_OR_GOTO(h->avctx, h->non_zero_count,
191 big_mb_num * 48 * sizeof(uint8_t), fail)
192 FF_ALLOCZ_OR_GOTO(h->avctx, h->slice_table_base,
193 (big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base), fail)
194 FF_ALLOCZ_OR_GOTO(h->avctx, h->cbp_table,
195 big_mb_num * sizeof(uint16_t), fail)
196 FF_ALLOCZ_OR_GOTO(h->avctx, h->chroma_pred_mode_table,
197 big_mb_num * sizeof(uint8_t), fail)
198 FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->mvd_table[0],
199 row_mb_num, 16 * sizeof(uint8_t), fail);
200 FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->mvd_table[1],
201 row_mb_num, 16 * sizeof(uint8_t), fail);
202 h->slice_ctx[0].mvd_table[0] = h->mvd_table[0];
203 h->slice_ctx[0].mvd_table[1] = h->mvd_table[1];
205 FF_ALLOCZ_OR_GOTO(h->avctx, h->direct_table,
206 4 * big_mb_num * sizeof(uint8_t), fail);
207 FF_ALLOCZ_OR_GOTO(h->avctx, h->list_counts,
208 big_mb_num * sizeof(uint8_t), fail)
210 memset(h->slice_table_base, -1,
211 (big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base));
212 h->slice_table = h->slice_table_base + h->mb_stride * 2 + 1;
214 FF_ALLOCZ_OR_GOTO(h->avctx, h->mb2b_xy,
215 big_mb_num * sizeof(uint32_t), fail);
216 FF_ALLOCZ_OR_GOTO(h->avctx, h->mb2br_xy,
217 big_mb_num * sizeof(uint32_t), fail);
218 for (y = 0; y < h->mb_height; y++)
219 for (x = 0; x < h->mb_width; x++) {
220 const int mb_xy = x + y * h->mb_stride;
221 const int b_xy = 4 * x + 4 * y * h->b_stride;
223 h->mb2b_xy[mb_xy] = b_xy;
224 h->mb2br_xy[mb_xy] = 8 * (FMO ? mb_xy : (mb_xy % (2 * h->mb_stride)));
230 ff_h264_free_tables(h);
231 return AVERROR(ENOMEM);
236 * Allocate buffers which are not shared amongst multiple threads.
238 int ff_h264_slice_context_init(H264Context *h, H264SliceContext *sl)
240 ERContext *er = &sl->er;
241 int mb_array_size = h->mb_height * h->mb_stride;
242 int y_size = (2 * h->mb_width + 1) * (2 * h->mb_height + 1);
243 int c_size = h->mb_stride * (h->mb_height + 1);
244 int yc_size = y_size + 2 * c_size;
247 sl->ref_cache[0][scan8[5] + 1] =
248 sl->ref_cache[0][scan8[7] + 1] =
249 sl->ref_cache[0][scan8[13] + 1] =
250 sl->ref_cache[1][scan8[5] + 1] =
251 sl->ref_cache[1][scan8[7] + 1] =
252 sl->ref_cache[1][scan8[13] + 1] = PART_NOT_AVAILABLE;
254 if (sl != h->slice_ctx) {
255 memset(er, 0, sizeof(*er));
257 if (CONFIG_ERROR_RESILIENCE) {
260 er->avctx = h->avctx;
261 er->decode_mb = h264_er_decode_mb;
263 er->quarter_sample = 1;
265 er->mb_num = h->mb_num;
266 er->mb_width = h->mb_width;
267 er->mb_height = h->mb_height;
268 er->mb_stride = h->mb_stride;
269 er->b8_stride = h->mb_width * 2 + 1;
271 // error resilience code looks cleaner with this
272 FF_ALLOCZ_OR_GOTO(h->avctx, er->mb_index2xy,
273 (h->mb_num + 1) * sizeof(int), fail);
275 for (y = 0; y < h->mb_height; y++)
276 for (x = 0; x < h->mb_width; x++)
277 er->mb_index2xy[x + y * h->mb_width] = x + y * h->mb_stride;
279 er->mb_index2xy[h->mb_height * h->mb_width] = (h->mb_height - 1) *
280 h->mb_stride + h->mb_width;
282 FF_ALLOCZ_OR_GOTO(h->avctx, er->error_status_table,
283 mb_array_size * sizeof(uint8_t), fail);
285 FF_ALLOC_OR_GOTO(h->avctx, er->er_temp_buffer,
286 h->mb_height * h->mb_stride, fail);
288 FF_ALLOCZ_OR_GOTO(h->avctx, sl->dc_val_base,
289 yc_size * sizeof(int16_t), fail);
290 er->dc_val[0] = sl->dc_val_base + h->mb_width * 2 + 2;
291 er->dc_val[1] = sl->dc_val_base + y_size + h->mb_stride + 1;
292 er->dc_val[2] = er->dc_val[1] + c_size;
293 for (i = 0; i < yc_size; i++)
294 sl->dc_val_base[i] = 1024;
300 return AVERROR(ENOMEM); // ff_h264_free_tables will clean up for us
303 static int h264_init_context(AVCodecContext *avctx, H264Context *h)
308 h->backup_width = -1;
309 h->backup_height = -1;
310 h->backup_pix_fmt = AV_PIX_FMT_NONE;
311 h->current_sps_id = -1;
312 h->cur_chroma_format_idc = -1;
314 h->picture_structure = PICT_FRAME;
315 h->slice_context_count = 1;
316 h->workaround_bugs = avctx->workaround_bugs;
317 h->flags = avctx->flags;
318 h->poc.prev_poc_msb = 1 << 16;
319 h->recovery_frame = -1;
320 h->frame_recovered = 0;
321 h->poc.prev_frame_num = -1;
322 h->sei.frame_packing.frame_packing_arrangement_cancel_flag = -1;
323 h->sei.unregistered.x264_build = -1;
325 h->next_outputed_poc = INT_MIN;
326 for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
327 h->last_pocs[i] = INT_MIN;
329 ff_h264_sei_uninit(&h->sei);
331 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
333 h->nb_slice_ctx = (avctx->active_thread_type & FF_THREAD_SLICE) ? H264_MAX_THREADS : 1;
334 h->slice_ctx = av_mallocz_array(h->nb_slice_ctx, sizeof(*h->slice_ctx));
337 return AVERROR(ENOMEM);
340 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
341 h->DPB[i].f = av_frame_alloc();
343 return AVERROR(ENOMEM);
346 h->cur_pic.f = av_frame_alloc();
348 return AVERROR(ENOMEM);
350 h->last_pic_for_ec.f = av_frame_alloc();
351 if (!h->last_pic_for_ec.f)
352 return AVERROR(ENOMEM);
354 for (i = 0; i < h->nb_slice_ctx; i++)
355 h->slice_ctx[i].h264 = h;
360 static av_cold int h264_decode_end(AVCodecContext *avctx)
362 H264Context *h = avctx->priv_data;
365 ff_h264_remove_all_refs(h);
366 ff_h264_free_tables(h);
368 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
369 ff_h264_unref_picture(h, &h->DPB[i]);
370 av_frame_free(&h->DPB[i].f);
372 memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
374 h->cur_pic_ptr = NULL;
376 av_freep(&h->slice_ctx);
379 ff_h264_sei_uninit(&h->sei);
381 for (i = 0; i < MAX_SPS_COUNT; i++)
382 av_buffer_unref(&h->ps.sps_list[i]);
384 for (i = 0; i < MAX_PPS_COUNT; i++)
385 av_buffer_unref(&h->ps.pps_list[i]);
387 av_buffer_unref(&h->ps.sps_ref);
388 av_buffer_unref(&h->ps.pps_ref);
390 ff_h2645_packet_uninit(&h->pkt);
392 ff_h264_unref_picture(h, &h->cur_pic);
393 av_frame_free(&h->cur_pic.f);
394 ff_h264_unref_picture(h, &h->last_pic_for_ec);
395 av_frame_free(&h->last_pic_for_ec.f);
400 static AVOnce h264_vlc_init = AV_ONCE_INIT;
402 av_cold int ff_h264_decode_init(AVCodecContext *avctx)
404 H264Context *h = avctx->priv_data;
407 ret = h264_init_context(avctx, h);
411 ret = ff_thread_once(&h264_vlc_init, ff_h264_decode_init_vlc);
413 av_log(avctx, AV_LOG_ERROR, "pthread_once has failed.");
414 return AVERROR_UNKNOWN;
417 if (avctx->codec_id == AV_CODEC_ID_H264) {
418 if (avctx->ticks_per_frame == 1) {
419 if(h->avctx->time_base.den < INT_MAX/2) {
420 h->avctx->time_base.den *= 2;
422 h->avctx->time_base.num /= 2;
424 avctx->ticks_per_frame = 2;
427 if (avctx->extradata_size > 0 && avctx->extradata) {
428 ret = ff_h264_decode_extradata(avctx->extradata, avctx->extradata_size,
429 &h->ps, &h->is_avc, &h->nal_length_size,
430 avctx->err_recognition, avctx);
432 h264_decode_end(avctx);
437 if (h->ps.sps && h->ps.sps->bitstream_restriction_flag &&
438 h->avctx->has_b_frames < h->ps.sps->num_reorder_frames) {
439 h->avctx->has_b_frames = h->ps.sps->num_reorder_frames;
442 avctx->internal->allocate_progress = 1;
444 ff_h264_flush_change(h);
446 if (h->enable_er < 0 && (avctx->active_thread_type & FF_THREAD_SLICE))
449 if (h->enable_er && (avctx->active_thread_type & FF_THREAD_SLICE)) {
450 av_log(avctx, AV_LOG_WARNING,
451 "Error resilience with slice threads is enabled. It is unsafe and unsupported and may crash. "
452 "Use it at your own risk\n");
459 static int decode_init_thread_copy(AVCodecContext *avctx)
461 H264Context *h = avctx->priv_data;
464 if (!avctx->internal->is_copy)
467 memset(h, 0, sizeof(*h));
469 ret = h264_init_context(avctx, h);
473 h->context_initialized = 0;
480 * Run setup operations that must be run after slice header decoding.
481 * This includes finding the next displayed frame.
483 * @param h h264 master context
484 * @param setup_finished enough NALs have been read that we can call
485 * ff_thread_finish_setup()
487 static void decode_postinit(H264Context *h, int setup_finished)
489 const SPS *sps = h->ps.sps;
490 H264Picture *out = h->cur_pic_ptr;
491 H264Picture *cur = h->cur_pic_ptr;
492 int i, pics, out_of_order, out_idx;
494 h->cur_pic_ptr->f->pict_type = h->pict_type;
496 if (h->next_output_pic)
499 if (cur->field_poc[0] == INT_MAX || cur->field_poc[1] == INT_MAX) {
500 /* FIXME: if we have two PAFF fields in one packet, we can't start
501 * the next thread here. If we have one field per packet, we can.
502 * The check in decode_nal_units() is not good enough to find this
503 * yet, so we assume the worst for now. */
504 // if (setup_finished)
505 // ff_thread_finish_setup(h->avctx);
506 if (cur->field_poc[0] == INT_MAX && cur->field_poc[1] == INT_MAX)
508 if (h->avctx->hwaccel || h->missing_fields <=1)
512 cur->f->interlaced_frame = 0;
513 cur->f->repeat_pict = 0;
515 /* Signal interlacing information externally. */
516 /* Prioritize picture timing SEI information over used
517 * decoding process if it exists. */
519 if (sps->pic_struct_present_flag) {
520 H264SEIPictureTiming *pt = &h->sei.picture_timing;
521 switch (pt->pic_struct) {
522 case SEI_PIC_STRUCT_FRAME:
524 case SEI_PIC_STRUCT_TOP_FIELD:
525 case SEI_PIC_STRUCT_BOTTOM_FIELD:
526 cur->f->interlaced_frame = 1;
528 case SEI_PIC_STRUCT_TOP_BOTTOM:
529 case SEI_PIC_STRUCT_BOTTOM_TOP:
530 if (FIELD_OR_MBAFF_PICTURE(h))
531 cur->f->interlaced_frame = 1;
533 // try to flag soft telecine progressive
534 cur->f->interlaced_frame = h->prev_interlaced_frame;
536 case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
537 case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
538 /* Signal the possibility of telecined film externally
539 * (pic_struct 5,6). From these hints, let the applications
540 * decide if they apply deinterlacing. */
541 cur->f->repeat_pict = 1;
543 case SEI_PIC_STRUCT_FRAME_DOUBLING:
544 cur->f->repeat_pict = 2;
546 case SEI_PIC_STRUCT_FRAME_TRIPLING:
547 cur->f->repeat_pict = 4;
551 if ((pt->ct_type & 3) &&
552 pt->pic_struct <= SEI_PIC_STRUCT_BOTTOM_TOP)
553 cur->f->interlaced_frame = (pt->ct_type & (1 << 1)) != 0;
555 /* Derive interlacing flag from used decoding process. */
556 cur->f->interlaced_frame = FIELD_OR_MBAFF_PICTURE(h);
558 h->prev_interlaced_frame = cur->f->interlaced_frame;
560 if (cur->field_poc[0] != cur->field_poc[1]) {
561 /* Derive top_field_first from field pocs. */
562 cur->f->top_field_first = cur->field_poc[0] < cur->field_poc[1];
564 if (sps->pic_struct_present_flag) {
565 /* Use picture timing SEI information. Even if it is a
566 * information of a past frame, better than nothing. */
567 if (h->sei.picture_timing.pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM ||
568 h->sei.picture_timing.pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM_TOP)
569 cur->f->top_field_first = 1;
571 cur->f->top_field_first = 0;
572 } else if (cur->f->interlaced_frame) {
573 /* Default to top field first when pic_struct_present_flag
574 * is not set but interlaced frame detected */
575 cur->f->top_field_first = 1;
577 /* Most likely progressive */
578 cur->f->top_field_first = 0;
582 if (h->sei.frame_packing.present &&
583 h->sei.frame_packing.frame_packing_arrangement_type <= 6 &&
584 h->sei.frame_packing.content_interpretation_type > 0 &&
585 h->sei.frame_packing.content_interpretation_type < 3) {
586 H264SEIFramePacking *fp = &h->sei.frame_packing;
587 AVStereo3D *stereo = av_stereo3d_create_side_data(cur->f);
589 switch (fp->frame_packing_arrangement_type) {
591 stereo->type = AV_STEREO3D_CHECKERBOARD;
594 stereo->type = AV_STEREO3D_COLUMNS;
597 stereo->type = AV_STEREO3D_LINES;
600 if (fp->quincunx_sampling_flag)
601 stereo->type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
603 stereo->type = AV_STEREO3D_SIDEBYSIDE;
606 stereo->type = AV_STEREO3D_TOPBOTTOM;
609 stereo->type = AV_STEREO3D_FRAMESEQUENCE;
612 stereo->type = AV_STEREO3D_2D;
616 if (fp->content_interpretation_type == 2)
617 stereo->flags = AV_STEREO3D_FLAG_INVERT;
621 if (h->sei.display_orientation.present &&
622 (h->sei.display_orientation.anticlockwise_rotation ||
623 h->sei.display_orientation.hflip ||
624 h->sei.display_orientation.vflip)) {
625 H264SEIDisplayOrientation *o = &h->sei.display_orientation;
626 double angle = o->anticlockwise_rotation * 360 / (double) (1 << 16);
627 AVFrameSideData *rotation = av_frame_new_side_data(cur->f,
628 AV_FRAME_DATA_DISPLAYMATRIX,
629 sizeof(int32_t) * 9);
631 av_display_rotation_set((int32_t *)rotation->data, angle);
632 av_display_matrix_flip((int32_t *)rotation->data,
637 if (h->sei.afd.present) {
638 AVFrameSideData *sd = av_frame_new_side_data(cur->f, AV_FRAME_DATA_AFD,
642 *sd->data = h->sei.afd.active_format_description;
643 h->sei.afd.present = 0;
647 if (h->sei.a53_caption.a53_caption) {
648 H264SEIA53Caption *a53 = &h->sei.a53_caption;
649 AVFrameSideData *sd = av_frame_new_side_data(cur->f,
650 AV_FRAME_DATA_A53_CC,
651 a53->a53_caption_size);
653 memcpy(sd->data, a53->a53_caption, a53->a53_caption_size);
654 av_freep(&a53->a53_caption);
655 a53->a53_caption_size = 0;
656 h->avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
659 cur->mmco_reset = h->mmco_reset;
662 // FIXME do something with unavailable reference frames
664 /* Sort B-frames into display order */
665 if (sps->bitstream_restriction_flag ||
666 h->avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT) {
667 h->avctx->has_b_frames = FFMAX(h->avctx->has_b_frames, sps->num_reorder_frames);
670 for (i = 0; 1; i++) {
671 if(i == MAX_DELAYED_PIC_COUNT || cur->poc < h->last_pocs[i]){
673 h->last_pocs[i-1] = cur->poc;
676 h->last_pocs[i-1]= h->last_pocs[i];
679 out_of_order = MAX_DELAYED_PIC_COUNT - i;
680 if( cur->f->pict_type == AV_PICTURE_TYPE_B
681 || (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))
682 out_of_order = FFMAX(out_of_order, 1);
683 if (out_of_order == MAX_DELAYED_PIC_COUNT) {
684 av_log(h->avctx, AV_LOG_VERBOSE, "Invalid POC %d<%d\n", cur->poc, h->last_pocs[0]);
685 for (i = 1; i < MAX_DELAYED_PIC_COUNT; i++)
686 h->last_pocs[i] = INT_MIN;
687 h->last_pocs[0] = cur->poc;
689 } else if(h->avctx->has_b_frames < out_of_order && !sps->bitstream_restriction_flag){
690 av_log(h->avctx, AV_LOG_INFO, "Increasing reorder buffer to %d\n", out_of_order);
691 h->avctx->has_b_frames = out_of_order;
695 while (h->delayed_pic[pics])
698 av_assert0(pics <= MAX_DELAYED_PIC_COUNT);
700 h->delayed_pic[pics++] = cur;
701 if (cur->reference == 0)
702 cur->reference = DELAYED_PIC_REF;
704 out = h->delayed_pic[0];
706 for (i = 1; h->delayed_pic[i] &&
707 !h->delayed_pic[i]->f->key_frame &&
708 !h->delayed_pic[i]->mmco_reset;
710 if (h->delayed_pic[i]->poc < out->poc) {
711 out = h->delayed_pic[i];
714 if (h->avctx->has_b_frames == 0 &&
715 (h->delayed_pic[0]->f->key_frame || h->delayed_pic[0]->mmco_reset))
716 h->next_outputed_poc = INT_MIN;
717 out_of_order = out->poc < h->next_outputed_poc;
719 if (out_of_order || pics > h->avctx->has_b_frames) {
720 out->reference &= ~DELAYED_PIC_REF;
721 for (i = out_idx; h->delayed_pic[i]; i++)
722 h->delayed_pic[i] = h->delayed_pic[i + 1];
724 if (!out_of_order && pics > h->avctx->has_b_frames) {
725 h->next_output_pic = out;
726 if (out_idx == 0 && h->delayed_pic[0] && (h->delayed_pic[0]->f->key_frame || h->delayed_pic[0]->mmco_reset)) {
727 h->next_outputed_poc = INT_MIN;
729 h->next_outputed_poc = out->poc;
731 av_log(h->avctx, AV_LOG_DEBUG, "no picture %s\n", out_of_order ? "ooo" : "");
734 if (h->next_output_pic) {
735 if (h->next_output_pic->recovered) {
736 // We have reached an recovery point and all frames after it in
737 // display order are "recovered".
738 h->frame_recovered |= FRAME_RECOVERED_SEI;
740 h->next_output_pic->recovered |= !!(h->frame_recovered & FRAME_RECOVERED_SEI);
743 if (setup_finished && !h->avctx->hwaccel) {
744 ff_thread_finish_setup(h->avctx);
746 if (h->avctx->active_thread_type & FF_THREAD_FRAME)
747 h->setup_finished = 1;
752 * instantaneous decoder refresh.
754 static void idr(H264Context *h)
757 ff_h264_remove_all_refs(h);
758 h->poc.prev_frame_num =
759 h->poc.prev_frame_num_offset = 0;
760 h->poc.prev_poc_msb = 1<<16;
761 h->poc.prev_poc_lsb = 0;
762 for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
763 h->last_pocs[i] = INT_MIN;
766 /* forget old pics after a seek */
767 void ff_h264_flush_change(H264Context *h)
771 h->next_outputed_poc = INT_MIN;
772 h->prev_interlaced_frame = 1;
775 h->poc.prev_frame_num = -1;
776 if (h->cur_pic_ptr) {
777 h->cur_pic_ptr->reference = 0;
778 for (j=i=0; h->delayed_pic[i]; i++)
779 if (h->delayed_pic[i] != h->cur_pic_ptr)
780 h->delayed_pic[j++] = h->delayed_pic[i];
781 h->delayed_pic[j] = NULL;
783 ff_h264_unref_picture(h, &h->last_pic_for_ec);
786 ff_h264_sei_uninit(&h->sei);
787 h->recovery_frame = -1;
788 h->frame_recovered = 0;
789 h->current_slice = 0;
791 for (i = 0; i < h->nb_slice_ctx; i++)
792 h->slice_ctx[i].list_count = 0;
795 /* forget old pics after a seek */
796 static void flush_dpb(AVCodecContext *avctx)
798 H264Context *h = avctx->priv_data;
801 memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
803 ff_h264_flush_change(h);
805 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++)
806 ff_h264_unref_picture(h, &h->DPB[i]);
807 h->cur_pic_ptr = NULL;
808 ff_h264_unref_picture(h, &h->cur_pic);
812 ff_h264_free_tables(h);
813 h->context_initialized = 0;
817 static const uint8_t start_code[] = { 0x00, 0x00, 0x01 };
820 static int get_last_needed_nal(H264Context *h)
827 for (i = 0; i < h->pkt.nb_nals; i++) {
828 H2645NAL *nal = &h->pkt.nals[i];
831 /* packets can sometimes contain multiple PPS/SPS,
832 * e.g. two PAFF field pictures in one packet, or a demuxer
833 * which splits NALs strangely if so, when frame threading we
834 * can't start the next thread until we've read all of them */
843 ret = init_get_bits8(&gb, nal->data + 1, (nal->size - 1));
846 if (!get_ue_golomb_long(&gb) || // first_mb_in_slice
848 first_slice != nal->type)
851 first_slice = nal->type;
858 static void debug_green_metadata(const H264SEIGreenMetaData *gm, void *logctx)
860 av_log(logctx, AV_LOG_DEBUG, "Green Metadata Info SEI message\n");
861 av_log(logctx, AV_LOG_DEBUG, " green_metadata_type: %d\n", gm->green_metadata_type);
863 if (gm->green_metadata_type == 0) {
864 av_log(logctx, AV_LOG_DEBUG, " green_metadata_period_type: %d\n", gm->period_type);
866 if (gm->period_type == 2)
867 av_log(logctx, AV_LOG_DEBUG, " green_metadata_num_seconds: %d\n", gm->num_seconds);
868 else if (gm->period_type == 3)
869 av_log(logctx, AV_LOG_DEBUG, " green_metadata_num_pictures: %d\n", gm->num_pictures);
871 av_log(logctx, AV_LOG_DEBUG, " SEI GREEN Complexity Metrics: %f %f %f %f\n",
872 (float)gm->percent_non_zero_macroblocks/255,
873 (float)gm->percent_intra_coded_macroblocks/255,
874 (float)gm->percent_six_tap_filtering/255,
875 (float)gm->percent_alpha_point_deblocking_instance/255);
877 } else if (gm->green_metadata_type == 1) {
878 av_log(logctx, AV_LOG_DEBUG, " xsd_metric_type: %d\n", gm->xsd_metric_type);
880 if (gm->xsd_metric_type == 0)
881 av_log(logctx, AV_LOG_DEBUG, " xsd_metric_value: %f\n",
882 (float)gm->xsd_metric_value/100);
886 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size)
888 AVCodecContext *const avctx = h->avctx;
889 unsigned context_count = 0;
890 int nals_needed = 0; ///< number of NALs that need decoding before the next frame thread starts
896 if(!h->slice_context_count)
897 h->slice_context_count= 1;
898 h->max_contexts = h->slice_context_count;
899 if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)) {
900 h->current_slice = 0;
902 h->cur_pic_ptr = NULL;
903 ff_h264_sei_uninit(&h->sei);
906 if (h->nal_length_size == 4) {
907 if (buf_size > 8 && AV_RB32(buf) == 1 && AV_RB32(buf+5) > (unsigned)buf_size) {
909 }else if(buf_size > 3 && AV_RB32(buf) > 1 && AV_RB32(buf) <= (unsigned)buf_size)
913 ret = ff_h2645_packet_split(&h->pkt, buf, buf_size, avctx, h->is_avc,
914 h->nal_length_size, avctx->codec_id);
916 av_log(avctx, AV_LOG_ERROR,
917 "Error splitting the input into NAL units.\n");
921 if (avctx->active_thread_type & FF_THREAD_FRAME)
922 nals_needed = get_last_needed_nal(h);
926 for (i = 0; i < h->pkt.nb_nals; i++) {
927 H2645NAL *nal = &h->pkt.nals[i];
928 H264SliceContext *sl = &h->slice_ctx[context_count];
931 if (avctx->skip_frame >= AVDISCARD_NONREF &&
932 nal->ref_idc == 0 && nal->type != NAL_SEI)
936 // FIXME these should stop being context-global variables
937 h->nal_ref_idc = nal->ref_idc;
938 h->nal_unit_type = nal->type;
943 if ((nal->data[1] & 0xFC) == 0x98) {
944 av_log(h->avctx, AV_LOG_ERROR, "Invalid inter IDR frame\n");
945 h->next_outputed_poc = INT_MIN;
949 if (nal->type != NAL_IDR_SLICE) {
950 av_log(h->avctx, AV_LOG_ERROR,
951 "Invalid mix of idr and non-idr slices\n");
956 if (h->current_slice && (avctx->active_thread_type & FF_THREAD_SLICE)) {
957 av_log(h, AV_LOG_ERROR, "invalid mixed IDR / non IDR frames cannot be decoded in slice multithreading mode\n");
958 ret = AVERROR_INVALIDDATA;
961 idr(h); // FIXME ensure we don't lose some frames if there is reordering
964 h->has_recovery_point = 1;
967 if ( nals_needed >= i
968 || (!(avctx->active_thread_type & FF_THREAD_FRAME) && !context_count))
971 if ((err = ff_h264_decode_slice_header(h, sl)))
974 if (h->sei.recovery_point.recovery_frame_cnt >= 0) {
975 const int sei_recovery_frame_cnt = h->sei.recovery_point.recovery_frame_cnt;
977 if (h->poc.frame_num != sei_recovery_frame_cnt || sl->slice_type_nos != AV_PICTURE_TYPE_I)
978 h->valid_recovery_point = 1;
980 if ( h->recovery_frame < 0
981 || av_mod_uintp2(h->recovery_frame - h->poc.frame_num, h->ps.sps->log2_max_frame_num) > sei_recovery_frame_cnt) {
982 h->recovery_frame = av_mod_uintp2(h->poc.frame_num + sei_recovery_frame_cnt, h->ps.sps->log2_max_frame_num);
984 if (!h->valid_recovery_point)
985 h->recovery_frame = h->poc.frame_num;
989 h->cur_pic_ptr->f->key_frame |= (nal->type == NAL_IDR_SLICE);
991 if (nal->type == NAL_IDR_SLICE ||
992 (h->recovery_frame == h->poc.frame_num && nal->ref_idc)) {
993 h->recovery_frame = -1;
994 h->cur_pic_ptr->recovered = 1;
996 // If we have an IDR, all frames after it in decoded order are
998 if (nal->type == NAL_IDR_SLICE)
999 h->frame_recovered |= FRAME_RECOVERED_IDR;
1001 h->cur_pic_ptr->recovered |= h->frame_recovered;
1003 h->cur_pic_ptr->recovered |= !!(h->frame_recovered & FRAME_RECOVERED_IDR);
1006 if (h->current_slice == 1) {
1007 if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS))
1008 decode_postinit(h, i >= nals_needed);
1010 if (h->avctx->hwaccel &&
1011 (ret = h->avctx->hwaccel->start_frame(h->avctx, buf, buf_size)) < 0)
1013 #if FF_API_CAP_VDPAU
1014 if (CONFIG_H264_VDPAU_DECODER &&
1015 h->avctx->codec->capabilities & AV_CODEC_CAP_HWACCEL_VDPAU)
1016 ff_vdpau_h264_picture_start(h);
1020 if (sl->redundant_pic_count == 0) {
1021 if (avctx->hwaccel) {
1022 ret = avctx->hwaccel->decode_slice(avctx,
1027 #if FF_API_CAP_VDPAU
1028 } else if (CONFIG_H264_VDPAU_DECODER &&
1029 h->avctx->codec->capabilities & AV_CODEC_CAP_HWACCEL_VDPAU) {
1030 ff_vdpau_add_data_chunk(h->cur_pic_ptr->f->data[0],
1032 sizeof(start_code));
1033 ff_vdpau_add_data_chunk(h->cur_pic_ptr->f->data[0],
1044 avpriv_request_sample(avctx, "data partitioning");
1047 ret = ff_h264_sei_decode(&h->sei, &nal->gb, &h->ps, avctx);
1048 h->has_recovery_point = h->has_recovery_point || h->sei.recovery_point.recovery_frame_cnt != -1;
1049 if (avctx->debug & FF_DEBUG_GREEN_MD)
1050 debug_green_metadata(&h->sei.green_metadata, h->avctx);
1052 FF_DISABLE_DEPRECATION_WARNINGS
1053 h->avctx->dtg_active_format = h->sei.afd.active_format_description;
1054 FF_ENABLE_DEPRECATION_WARNINGS
1055 #endif /* FF_API_AFD */
1056 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1060 GetBitContext tmp_gb = nal->gb;
1061 if (ff_h264_decode_seq_parameter_set(&tmp_gb, avctx, &h->ps, 0) >= 0)
1063 av_log(h->avctx, AV_LOG_DEBUG,
1064 "SPS decoding failure, trying again with the complete NAL\n");
1065 init_get_bits8(&tmp_gb, nal->raw_data + 1, nal->raw_size - 1);
1066 if (ff_h264_decode_seq_parameter_set(&tmp_gb, avctx, &h->ps, 0) >= 0)
1068 ff_h264_decode_seq_parameter_set(&nal->gb, avctx, &h->ps, 1);
1072 ret = ff_h264_decode_picture_parameter_set(&nal->gb, avctx, &h->ps,
1074 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1078 case NAL_END_SEQUENCE:
1079 case NAL_END_STREAM:
1080 case NAL_FILLER_DATA:
1082 case NAL_AUXILIARY_SLICE:
1087 av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n",
1088 nal->type, nal->size_bits);
1091 if (context_count == h->max_contexts) {
1092 ret = ff_h264_execute_decode_slices(h, context_count);
1093 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1098 if (err < 0 || err == SLICE_SKIPED) {
1100 av_log(h->avctx, AV_LOG_ERROR, "decode_slice_header error\n");
1101 sl->ref_count[0] = sl->ref_count[1] = sl->list_count = 0;
1102 } else if (err == SLICE_SINGLETHREAD) {
1103 if (context_count > 0) {
1104 ret = ff_h264_execute_decode_slices(h, context_count);
1105 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1109 /* Slice could not be decoded in parallel mode, restart. */
1110 sl = &h->slice_ctx[0];
1114 if (context_count) {
1115 ret = ff_h264_execute_decode_slices(h, context_count);
1116 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1123 #if CONFIG_ERROR_RESILIENCE
1125 * FIXME: Error handling code does not seem to support interlaced
1126 * when slices span multiple rows
1127 * The ff_er_add_slice calls don't work right for bottom
1128 * fields; they cause massive erroneous error concealing
1129 * Error marking covers both fields (top and bottom).
1130 * This causes a mismatched s->error_count
1131 * and a bad error table. Further, the error count goes to
1132 * INT_MAX when called for bottom field, because mb_y is
1133 * past end by one (callers fault) and resync_mb_y != 0
1134 * causes problems for the first MB line, too.
1136 if (!FIELD_PICTURE(h) && h->current_slice &&
1137 h->ps.sps == (const SPS*)h->ps.sps_list[h->ps.pps->sps_id]->data &&
1140 H264SliceContext *sl = h->slice_ctx;
1141 int use_last_pic = h->last_pic_for_ec.f->buf[0] && !sl->ref_count[0];
1143 ff_h264_set_erpic(&sl->er.cur_pic, h->cur_pic_ptr);
1146 ff_h264_set_erpic(&sl->er.last_pic, &h->last_pic_for_ec);
1147 sl->ref_list[0][0].parent = &h->last_pic_for_ec;
1148 memcpy(sl->ref_list[0][0].data, h->last_pic_for_ec.f->data, sizeof(sl->ref_list[0][0].data));
1149 memcpy(sl->ref_list[0][0].linesize, h->last_pic_for_ec.f->linesize, sizeof(sl->ref_list[0][0].linesize));
1150 sl->ref_list[0][0].reference = h->last_pic_for_ec.reference;
1151 } else if (sl->ref_count[0]) {
1152 ff_h264_set_erpic(&sl->er.last_pic, sl->ref_list[0][0].parent);
1154 ff_h264_set_erpic(&sl->er.last_pic, NULL);
1156 if (sl->ref_count[1])
1157 ff_h264_set_erpic(&sl->er.next_pic, sl->ref_list[1][0].parent);
1159 sl->er.ref_count = sl->ref_count[0];
1161 ff_er_frame_end(&sl->er);
1163 memset(&sl->ref_list[0][0], 0, sizeof(sl->ref_list[0][0]));
1165 #endif /* CONFIG_ERROR_RESILIENCE */
1167 if (h->cur_pic_ptr && !h->droppable) {
1168 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
1169 h->picture_structure == PICT_BOTTOM_FIELD);
1172 return (ret < 0) ? ret : buf_size;
1176 * Return the number of bytes consumed for building the current frame.
1178 static int get_consumed_bytes(int pos, int buf_size)
1181 pos = 1; // avoid infinite loops (I doubt that is needed but...)
1182 if (pos + 10 > buf_size)
1183 pos = buf_size; // oops ;)
1188 static int output_frame(H264Context *h, AVFrame *dst, H264Picture *srcp)
1190 AVFrame *src = srcp->f;
1191 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(src->format);
1193 int ret = av_frame_ref(dst, src);
1197 av_dict_set(&dst->metadata, "stereo_mode", ff_h264_sei_stereo_mode(&h->sei.frame_packing), 0);
1199 h->backup_width = h->avctx->width;
1200 h->backup_height = h->avctx->height;
1201 h->backup_pix_fmt = h->avctx->pix_fmt;
1203 h->avctx->width = dst->width;
1204 h->avctx->height = dst->height;
1205 h->avctx->pix_fmt = dst->format;
1207 if (srcp->sei_recovery_frame_cnt == 0)
1212 for (i = 0; i < desc->nb_components; i++) {
1213 int hshift = (i > 0) ? desc->log2_chroma_w : 0;
1214 int vshift = (i > 0) ? desc->log2_chroma_h : 0;
1215 int off = ((srcp->crop_left >> hshift) << h->pixel_shift) +
1216 (srcp->crop_top >> vshift) * dst->linesize[i];
1217 dst->data[i] += off;
1222 static int is_extra(const uint8_t *buf, int buf_size)
1224 int cnt= buf[5]&0x1f;
1225 const uint8_t *p= buf+6;
1227 int nalsize= AV_RB16(p) + 2;
1228 if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 7)
1236 int nalsize= AV_RB16(p) + 2;
1237 if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 8)
1244 static int h264_decode_frame(AVCodecContext *avctx, void *data,
1245 int *got_frame, AVPacket *avpkt)
1247 const uint8_t *buf = avpkt->data;
1248 int buf_size = avpkt->size;
1249 H264Context *h = avctx->priv_data;
1250 AVFrame *pict = data;
1256 h->flags = avctx->flags;
1257 h->setup_finished = 0;
1259 if (h->backup_width != -1) {
1260 avctx->width = h->backup_width;
1261 h->backup_width = -1;
1263 if (h->backup_height != -1) {
1264 avctx->height = h->backup_height;
1265 h->backup_height = -1;
1267 if (h->backup_pix_fmt != AV_PIX_FMT_NONE) {
1268 avctx->pix_fmt = h->backup_pix_fmt;
1269 h->backup_pix_fmt = AV_PIX_FMT_NONE;
1272 ff_h264_unref_picture(h, &h->last_pic_for_ec);
1274 /* end of stream, output what is still in the buffers */
1275 if (buf_size == 0) {
1278 h->cur_pic_ptr = NULL;
1281 // FIXME factorize this with the output code below
1282 out = h->delayed_pic[0];
1285 h->delayed_pic[i] &&
1286 !h->delayed_pic[i]->f->key_frame &&
1287 !h->delayed_pic[i]->mmco_reset;
1289 if (h->delayed_pic[i]->poc < out->poc) {
1290 out = h->delayed_pic[i];
1294 for (i = out_idx; h->delayed_pic[i]; i++)
1295 h->delayed_pic[i] = h->delayed_pic[i + 1];
1298 out->reference &= ~DELAYED_PIC_REF;
1299 ret = output_frame(h, pict, out);
1307 if (h->is_avc && av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, NULL)) {
1309 uint8_t *side = av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, &side_size);
1310 if (is_extra(side, side_size))
1311 ff_h264_decode_extradata(side, side_size,
1312 &h->ps, &h->is_avc, &h->nal_length_size,
1313 avctx->err_recognition, avctx);
1315 if(h->is_avc && buf_size >= 9 && buf[0]==1 && buf[2]==0 && (buf[4]&0xFC)==0xFC && (buf[5]&0x1F) && buf[8]==0x67){
1316 if (is_extra(buf, buf_size))
1317 return ff_h264_decode_extradata(buf, buf_size,
1318 &h->ps, &h->is_avc, &h->nal_length_size,
1319 avctx->err_recognition, avctx);
1322 buf_index = decode_nal_units(h, buf, buf_size);
1324 return AVERROR_INVALIDDATA;
1326 if (!h->cur_pic_ptr && h->nal_unit_type == NAL_END_SEQUENCE) {
1327 av_assert0(buf_index <= buf_size);
1331 if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS) && !h->cur_pic_ptr) {
1332 if (avctx->skip_frame >= AVDISCARD_NONREF ||
1333 buf_size >= 4 && !memcmp("Q264", buf, 4))
1335 av_log(avctx, AV_LOG_ERROR, "no frame!\n");
1336 return AVERROR_INVALIDDATA;
1339 if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS) ||
1340 (h->mb_y >= h->mb_height && h->mb_height)) {
1341 if (avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)
1342 decode_postinit(h, 1);
1344 if ((ret = ff_h264_field_end(h, &h->slice_ctx[0], 0)) < 0)
1347 /* Wait for second field. */
1349 if (h->next_output_pic && ((avctx->flags & AV_CODEC_FLAG_OUTPUT_CORRUPT) ||
1350 (avctx->flags2 & AV_CODEC_FLAG2_SHOW_ALL) ||
1351 h->next_output_pic->recovered)) {
1352 if (!h->next_output_pic->recovered)
1353 h->next_output_pic->f->flags |= AV_FRAME_FLAG_CORRUPT;
1355 if (!h->avctx->hwaccel &&
1356 (h->next_output_pic->field_poc[0] == INT_MAX ||
1357 h->next_output_pic->field_poc[1] == INT_MAX)
1360 AVFrame *f = h->next_output_pic->f;
1361 int field = h->next_output_pic->field_poc[0] == INT_MAX;
1362 uint8_t *dst_data[4];
1364 const uint8_t *src_data[4];
1366 av_log(h->avctx, AV_LOG_DEBUG, "Duplicating field %d to fill missing\n", field);
1368 for (p = 0; p<4; p++) {
1369 dst_data[p] = f->data[p] + (field^1)*f->linesize[p];
1370 src_data[p] = f->data[p] + field *f->linesize[p];
1371 linesizes[p] = 2*f->linesize[p];
1374 av_image_copy(dst_data, linesizes, src_data, linesizes,
1375 f->format, f->width, f->height>>1);
1378 ret = output_frame(h, pict, h->next_output_pic);
1382 if (CONFIG_MPEGVIDEO) {
1383 ff_print_debug_info2(h->avctx, pict, NULL,
1384 h->next_output_pic->mb_type,
1385 h->next_output_pic->qscale_table,
1386 h->next_output_pic->motion_val,
1388 h->mb_width, h->mb_height, h->mb_stride, 1);
1393 av_assert0(pict->buf[0] || !*got_frame);
1395 ff_h264_unref_picture(h, &h->last_pic_for_ec);
1397 return get_consumed_bytes(buf_index, buf_size);
1400 #define OFFSET(x) offsetof(H264Context, x)
1401 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1402 static const AVOption h264_options[] = {
1403 {"is_avc", "is avc", offsetof(H264Context, is_avc), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, 0},
1404 {"nal_length_size", "nal_length_size", offsetof(H264Context, nal_length_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 4, 0},
1405 { "enable_er", "Enable error resilience on damaged frames (unsafe)", OFFSET(enable_er), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, VD },
1409 static const AVClass h264_class = {
1410 .class_name = "H264 Decoder",
1411 .item_name = av_default_item_name,
1412 .option = h264_options,
1413 .version = LIBAVUTIL_VERSION_INT,
1416 AVCodec ff_h264_decoder = {
1418 .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
1419 .type = AVMEDIA_TYPE_VIDEO,
1420 .id = AV_CODEC_ID_H264,
1421 .priv_data_size = sizeof(H264Context),
1422 .init = ff_h264_decode_init,
1423 .close = h264_decode_end,
1424 .decode = h264_decode_frame,
1425 .capabilities = /*AV_CODEC_CAP_DRAW_HORIZ_BAND |*/ AV_CODEC_CAP_DR1 |
1426 AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS |
1427 AV_CODEC_CAP_FRAME_THREADS,
1428 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
1430 .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
1431 .update_thread_context = ONLY_IF_THREADS_ENABLED(ff_h264_update_thread_context),
1432 .profiles = NULL_IF_CONFIG_SMALL(ff_h264_profiles),
1433 .priv_class = &h264_class,
1436 #if CONFIG_H264_VDPAU_DECODER && FF_API_VDPAU
1437 static const AVClass h264_vdpau_class = {
1438 .class_name = "H264 VDPAU Decoder",
1439 .item_name = av_default_item_name,
1440 .option = h264_options,
1441 .version = LIBAVUTIL_VERSION_INT,
1444 AVCodec ff_h264_vdpau_decoder = {
1445 .name = "h264_vdpau",
1446 .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (VDPAU acceleration)"),
1447 .type = AVMEDIA_TYPE_VIDEO,
1448 .id = AV_CODEC_ID_H264,
1449 .priv_data_size = sizeof(H264Context),
1450 .init = ff_h264_decode_init,
1451 .close = h264_decode_end,
1452 .decode = h264_decode_frame,
1453 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_HWACCEL_VDPAU,
1455 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_VDPAU_H264,
1457 .profiles = NULL_IF_CONFIG_SMALL(ff_h264_profiles),
1458 .priv_class = &h264_vdpau_class,