3 * Copyright (c) 2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 #define UNCHECKED_BITSTREAM_READER 1
30 #include "libavutil/cpu.h"
32 #include "error_resilience.h"
35 #include "h263_parser.h"
37 #include "mpeg4video.h"
38 #include "mpeg4video_parser.h"
39 #include "mpegvideo.h"
41 #include "vdpau_internal.h"
44 av_cold int ff_h263_decode_init(AVCodecContext *avctx)
46 MpegEncContext *s = avctx->priv_data;
50 s->out_format = FMT_H263;
51 s->width = avctx->coded_width;
52 s->height = avctx->coded_height;
53 s->workaround_bugs = avctx->workaround_bugs;
56 ff_MPV_decode_defaults(s);
57 s->quant_precision = 5;
58 s->decode_mb = ff_h263_decode_mb;
60 if (avctx->codec->id == AV_CODEC_ID_MSS2)
61 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
63 avctx->pix_fmt = ff_get_format(avctx, avctx->codec->pix_fmts);
64 s->unrestricted_mv = 1;
66 /* select sub codec */
67 switch (avctx->codec->id) {
68 case AV_CODEC_ID_H263:
69 case AV_CODEC_ID_H263P:
70 s->unrestricted_mv = 0;
71 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
73 case AV_CODEC_ID_MPEG4:
75 case AV_CODEC_ID_MSMPEG4V1:
77 s->msmpeg4_version = 1;
79 case AV_CODEC_ID_MSMPEG4V2:
81 s->msmpeg4_version = 2;
83 case AV_CODEC_ID_MSMPEG4V3:
85 s->msmpeg4_version = 3;
87 case AV_CODEC_ID_WMV1:
89 s->msmpeg4_version = 4;
91 case AV_CODEC_ID_WMV2:
93 s->msmpeg4_version = 5;
96 case AV_CODEC_ID_WMV3:
97 case AV_CODEC_ID_VC1IMAGE:
98 case AV_CODEC_ID_WMV3IMAGE:
99 case AV_CODEC_ID_MSS2:
101 s->msmpeg4_version = 6;
102 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
104 case AV_CODEC_ID_H263I:
106 case AV_CODEC_ID_FLV1:
110 av_log(avctx, AV_LOG_ERROR, "Unsupported codec %d\n",
112 return AVERROR(ENOSYS);
114 s->codec_id = avctx->codec->id;
116 if (avctx->stream_codec_tag == AV_RL32("l263") && avctx->extradata_size == 56 && avctx->extradata[0] == 1)
119 /* for h263, we allocate the images after having read the header */
120 if (avctx->codec->id != AV_CODEC_ID_H263 &&
121 avctx->codec->id != AV_CODEC_ID_H263P &&
122 avctx->codec->id != AV_CODEC_ID_MPEG4)
123 if ((ret = ff_MPV_common_init(s)) < 0)
126 ff_h263dsp_init(&s->h263dsp);
127 ff_h263_decode_init_vlc();
132 av_cold int ff_h263_decode_end(AVCodecContext *avctx)
134 MpegEncContext *s = avctx->priv_data;
136 ff_MPV_common_end(s);
141 * Return the number of bytes consumed for building the current frame.
143 static int get_consumed_bytes(MpegEncContext *s, int buf_size)
145 int pos = (get_bits_count(&s->gb) + 7) >> 3;
147 if (s->divx_packed || s->avctx->hwaccel) {
148 /* We would have to scan through the whole buf to handle the weird
151 } else if (s->flags & CODEC_FLAG_TRUNCATED) {
152 pos -= s->parse_context.last_index;
153 // padding is not really read so this might be -1
158 // avoid infinite loops (maybe not needed...)
162 if (pos + 10 > buf_size)
169 static int decode_slice(MpegEncContext *s)
171 const int part_mask = s->partitioned_frame
172 ? (ER_AC_END | ER_AC_ERROR) : 0x7F;
173 const int mb_size = 16 >> s->avctx->lowres;
176 s->last_resync_gb = s->gb;
177 s->first_slice_line = 1;
178 s->resync_mb_x = s->mb_x;
179 s->resync_mb_y = s->mb_y;
181 ff_set_qscale(s, s->qscale);
183 if (s->avctx->hwaccel) {
184 const uint8_t *start = s->gb.buffer + get_bits_count(&s->gb) / 8;
185 ret = s->avctx->hwaccel->decode_slice(s->avctx, start, s->gb.buffer_end - start);
186 // ensure we exit decode loop
187 s->mb_y = s->mb_height;
191 if (s->partitioned_frame) {
192 const int qscale = s->qscale;
194 if (CONFIG_MPEG4_DECODER && s->codec_id == AV_CODEC_ID_MPEG4)
195 if ((ret = ff_mpeg4_decode_partitions(s->avctx->priv_data)) < 0)
198 /* restore variables which were modified */
199 s->first_slice_line = 1;
200 s->mb_x = s->resync_mb_x;
201 s->mb_y = s->resync_mb_y;
202 ff_set_qscale(s, qscale);
205 for (; s->mb_y < s->mb_height; s->mb_y++) {
206 /* per-row end of slice checks */
207 if (s->msmpeg4_version) {
208 if (s->resync_mb_y + s->slice_height == s->mb_y) {
209 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
210 s->mb_x - 1, s->mb_y, ER_MB_END);
216 if (s->msmpeg4_version == 1) {
222 ff_init_block_index(s);
223 for (; s->mb_x < s->mb_width; s->mb_x++) {
226 ff_update_block_index(s);
228 if (s->resync_mb_x == s->mb_x && s->resync_mb_y + 1 == s->mb_y)
229 s->first_slice_line = 0;
233 s->mv_dir = MV_DIR_FORWARD;
234 s->mv_type = MV_TYPE_16X16;
235 av_dlog(s, "%d %d %06X\n",
236 ret, get_bits_count(&s->gb), show_bits(&s->gb, 24));
238 tprintf(NULL, "Decoding MB at %dx%d\n", s->mb_x, s->mb_y);
239 ret = s->decode_mb(s, s->block);
241 if (s->pict_type != AV_PICTURE_TYPE_B)
242 ff_h263_update_motion_val(s);
245 const int xy = s->mb_x + s->mb_y * s->mb_stride;
246 if (ret == SLICE_END) {
247 ff_MPV_decode_mb(s, s->block);
249 ff_h263_loop_filter(s);
251 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
252 s->mb_x, s->mb_y, ER_MB_END & part_mask);
254 s->padding_bug_score--;
256 if (++s->mb_x >= s->mb_width) {
258 ff_mpeg_draw_horiz_band(s, s->mb_y * mb_size, mb_size);
259 ff_MPV_report_decode_progress(s);
263 } else if (ret == SLICE_NOEND) {
264 av_log(s->avctx, AV_LOG_ERROR,
265 "Slice mismatch at MB: %d\n", xy);
266 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
267 s->mb_x + 1, s->mb_y,
268 ER_MB_END & part_mask);
269 return AVERROR_INVALIDDATA;
271 av_log(s->avctx, AV_LOG_ERROR, "Error at MB: %d\n", xy);
272 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
273 s->mb_x, s->mb_y, ER_MB_ERROR & part_mask);
275 if (s->err_recognition & AV_EF_IGNORE_ERR)
277 return AVERROR_INVALIDDATA;
280 ff_MPV_decode_mb(s, s->block);
282 ff_h263_loop_filter(s);
285 ff_mpeg_draw_horiz_band(s, s->mb_y * mb_size, mb_size);
286 ff_MPV_report_decode_progress(s);
291 av_assert1(s->mb_x == 0 && s->mb_y == s->mb_height);
293 if (s->codec_id == AV_CODEC_ID_MPEG4 &&
294 (s->workaround_bugs & FF_BUG_AUTODETECT) &&
295 get_bits_left(&s->gb) >= 48 &&
296 show_bits(&s->gb, 24) == 0x4010 &&
297 !s->data_partitioning)
298 s->padding_bug_score += 32;
300 /* try to detect the padding bug */
301 if (s->codec_id == AV_CODEC_ID_MPEG4 &&
302 (s->workaround_bugs & FF_BUG_AUTODETECT) &&
303 get_bits_left(&s->gb) >= 0 &&
304 get_bits_left(&s->gb) < 137 &&
305 !s->data_partitioning) {
306 const int bits_count = get_bits_count(&s->gb);
307 const int bits_left = s->gb.size_in_bits - bits_count;
309 if (bits_left == 0) {
310 s->padding_bug_score += 16;
311 } else if (bits_left != 1) {
312 int v = show_bits(&s->gb, 8);
313 v |= 0x7F >> (7 - (bits_count & 7));
315 if (v == 0x7F && bits_left <= 8)
316 s->padding_bug_score--;
317 else if (v == 0x7F && ((get_bits_count(&s->gb) + 8) & 8) &&
319 s->padding_bug_score += 4;
321 s->padding_bug_score++;
325 if (s->codec_id == AV_CODEC_ID_H263 &&
326 (s->workaround_bugs & FF_BUG_AUTODETECT) &&
327 get_bits_left(&s->gb) >= 8 &&
328 get_bits_left(&s->gb) < 300 &&
329 s->pict_type == AV_PICTURE_TYPE_I &&
330 show_bits(&s->gb, 8) == 0 &&
331 !s->data_partitioning) {
333 s->padding_bug_score += 32;
336 if (s->workaround_bugs & FF_BUG_AUTODETECT) {
337 if (s->padding_bug_score > -2 && !s->data_partitioning)
338 s->workaround_bugs |= FF_BUG_NO_PADDING;
340 s->workaround_bugs &= ~FF_BUG_NO_PADDING;
343 // handle formats which don't have unique end markers
344 if (s->msmpeg4_version || (s->workaround_bugs & FF_BUG_NO_PADDING)) { // FIXME perhaps solve this more cleanly
345 int left = get_bits_left(&s->gb);
348 /* no markers in M$ crap */
349 if (s->msmpeg4_version && s->pict_type == AV_PICTURE_TYPE_I)
352 /* buggy padding but the frame should still end approximately at
353 * the bitstream end */
354 if ((s->workaround_bugs & FF_BUG_NO_PADDING) &&
355 (s->err_recognition & (AV_EF_BUFFER|AV_EF_AGGRESSIVE)))
357 else if ((s->workaround_bugs & FF_BUG_NO_PADDING))
358 max_extra += 256 * 256 * 256 * 64;
360 if (left > max_extra)
361 av_log(s->avctx, AV_LOG_ERROR,
362 "discarding %d junk bits at end, next would be %X\n",
363 left, show_bits(&s->gb, 24));
365 av_log(s->avctx, AV_LOG_ERROR, "overreading %d bits\n", -left);
367 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
368 s->mb_x - 1, s->mb_y, ER_MB_END);
373 av_log(s->avctx, AV_LOG_ERROR,
374 "slice end not reached but screenspace end (%d left %06X, score= %d)\n",
375 get_bits_left(&s->gb), show_bits(&s->gb, 24), s->padding_bug_score);
377 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
378 ER_MB_END & part_mask);
380 return AVERROR_INVALIDDATA;
383 int ff_h263_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
386 const uint8_t *buf = avpkt->data;
387 int buf_size = avpkt->size;
388 MpegEncContext *s = avctx->priv_data;
391 AVFrame *pict = data;
393 s->flags = avctx->flags;
394 s->flags2 = avctx->flags2;
396 /* no supplementary picture */
398 /* special case for last picture */
399 if (s->low_delay == 0 && s->next_picture_ptr) {
400 if ((ret = av_frame_ref(pict, s->next_picture_ptr->f)) < 0)
402 s->next_picture_ptr = NULL;
410 if (s->flags & CODEC_FLAG_TRUNCATED) {
413 if (CONFIG_MPEG4_DECODER && s->codec_id == AV_CODEC_ID_MPEG4) {
414 next = ff_mpeg4_find_frame_end(&s->parse_context, buf, buf_size);
415 } else if (CONFIG_H263_DECODER && s->codec_id == AV_CODEC_ID_H263) {
416 next = ff_h263_find_frame_end(&s->parse_context, buf, buf_size);
417 } else if (CONFIG_H263P_DECODER && s->codec_id == AV_CODEC_ID_H263P) {
418 next = ff_h263_find_frame_end(&s->parse_context, buf, buf_size);
420 av_log(s->avctx, AV_LOG_ERROR,
421 "this codec does not support truncated bitstreams\n");
422 return AVERROR(ENOSYS);
425 if (ff_combine_frame(&s->parse_context, next, (const uint8_t **)&buf,
431 if (s->divx_packed && s->bitstream_buffer_size) {
433 for(i=0; i < buf_size-3; i++) {
434 if (buf[i]==0 && buf[i+1]==0 && buf[i+2]==1) {
435 if (buf[i+3]==0xB0) {
436 av_log(s->avctx, AV_LOG_WARNING, "Discarding excessive bitstream in packed xvid\n");
437 s->bitstream_buffer_size = 0;
444 if (s->bitstream_buffer_size && (s->divx_packed || buf_size < 20)) // divx 5.01+/xvid frame reorder
445 ret = init_get_bits8(&s->gb, s->bitstream_buffer,
446 s->bitstream_buffer_size);
448 ret = init_get_bits8(&s->gb, buf, buf_size);
450 s->bitstream_buffer_size = 0;
454 if (!s->context_initialized)
455 // we need the idct permutaton for reading a custom matrix
456 if ((ret = ff_MPV_common_init(s)) < 0)
459 /* We need to set current_picture_ptr before reading the header,
460 * otherwise we cannot store anyting in there */
461 if (s->current_picture_ptr == NULL || s->current_picture_ptr->f->data[0]) {
462 int i = ff_find_unused_picture(s, 0);
465 s->current_picture_ptr = &s->picture[i];
469 if (CONFIG_WMV2_DECODER && s->msmpeg4_version == 5) {
470 ret = ff_wmv2_decode_picture_header(s);
471 } else if (CONFIG_MSMPEG4_DECODER && s->msmpeg4_version) {
472 ret = ff_msmpeg4_decode_picture_header(s);
473 } else if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4) {
474 if (s->avctx->extradata_size && s->picture_number == 0) {
477 if (init_get_bits8(&gb, s->avctx->extradata, s->avctx->extradata_size) >= 0 )
478 ff_mpeg4_decode_picture_header(avctx->priv_data, &gb);
480 ret = ff_mpeg4_decode_picture_header(avctx->priv_data, &s->gb);
481 } else if (CONFIG_H263I_DECODER && s->codec_id == AV_CODEC_ID_H263I) {
482 ret = ff_intel_h263_decode_picture_header(s);
483 } else if (CONFIG_FLV_DECODER && s->h263_flv) {
484 ret = ff_flv_decode_picture_header(s);
486 ret = ff_h263_decode_picture_header(s);
489 if (ret < 0 || ret == FRAME_SKIPPED) {
490 if ( s->width != avctx->coded_width
491 || s->height != avctx->coded_height) {
492 av_log(s->avctx, AV_LOG_WARNING, "Reverting picture dimensions change due to header decoding failure\n");
493 s->width = avctx->coded_width;
494 s->height= avctx->coded_height;
497 if (ret == FRAME_SKIPPED)
498 return get_consumed_bytes(s, buf_size);
500 /* skip if the header was thrashed */
502 av_log(s->avctx, AV_LOG_ERROR, "header damaged\n");
506 avctx->has_b_frames = !s->low_delay;
508 if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4) {
509 if (ff_mpeg4_workaround_bugs(avctx) == 1)
513 /* After H263 & mpeg4 header decode we have the height, width,
514 * and other parameters. So then we could init the picture.
515 * FIXME: By the way H263 decoder is evolving it should have
516 * an H263EncContext */
517 if (s->width != avctx->coded_width ||
518 s->height != avctx->coded_height ||
520 /* H.263 could change picture size any time */
521 s->context_reinit = 0;
523 ret = ff_set_dimensions(avctx, s->width, s->height);
527 if ((ret = ff_MPV_common_frame_size_change(s)))
531 if (s->codec_id == AV_CODEC_ID_H263 ||
532 s->codec_id == AV_CODEC_ID_H263P ||
533 s->codec_id == AV_CODEC_ID_H263I)
534 s->gob_index = ff_h263_get_gob_height(s);
536 // for skipping the frame
537 s->current_picture.f->pict_type = s->pict_type;
538 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
540 /* skip B-frames if we don't have reference frames */
541 if (s->last_picture_ptr == NULL &&
542 (s->pict_type == AV_PICTURE_TYPE_B || s->droppable))
543 return get_consumed_bytes(s, buf_size);
544 if ((avctx->skip_frame >= AVDISCARD_NONREF &&
545 s->pict_type == AV_PICTURE_TYPE_B) ||
546 (avctx->skip_frame >= AVDISCARD_NONKEY &&
547 s->pict_type != AV_PICTURE_TYPE_I) ||
548 avctx->skip_frame >= AVDISCARD_ALL)
549 return get_consumed_bytes(s, buf_size);
551 if (s->next_p_frame_damaged) {
552 if (s->pict_type == AV_PICTURE_TYPE_B)
553 return get_consumed_bytes(s, buf_size);
555 s->next_p_frame_damaged = 0;
558 if ((!s->no_rounding) || s->pict_type == AV_PICTURE_TYPE_B) {
559 s->me.qpel_put = s->dsp.put_qpel_pixels_tab;
560 s->me.qpel_avg = s->dsp.avg_qpel_pixels_tab;
562 s->me.qpel_put = s->dsp.put_no_rnd_qpel_pixels_tab;
563 s->me.qpel_avg = s->dsp.avg_qpel_pixels_tab;
566 if ((ret = ff_MPV_frame_start(s, avctx)) < 0)
569 if (!s->divx_packed && !avctx->hwaccel)
570 ff_thread_finish_setup(avctx);
572 if (CONFIG_MPEG4_VDPAU_DECODER && (s->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU)) {
573 ff_vdpau_mpeg4_decode_picture(avctx->priv_data, s->gb.buffer, s->gb.buffer_end - s->gb.buffer);
577 if (avctx->hwaccel) {
578 ret = avctx->hwaccel->start_frame(avctx, s->gb.buffer,
579 s->gb.buffer_end - s->gb.buffer);
584 ff_mpeg_er_frame_start(s);
586 /* the second part of the wmv2 header contains the MB skip bits which
587 * are stored in current_picture->mb_type which is not available before
588 * ff_MPV_frame_start() */
589 if (CONFIG_WMV2_DECODER && s->msmpeg4_version == 5) {
590 ret = ff_wmv2_decode_secondary_picture_header(s);
597 /* decode each macroblock */
601 slice_ret = decode_slice(s);
602 while (s->mb_y < s->mb_height) {
603 if (s->msmpeg4_version) {
604 if (s->slice_height == 0 || s->mb_x != 0 ||
605 (s->mb_y % s->slice_height) != 0 || get_bits_left(&s->gb) < 0)
608 int prev_x = s->mb_x, prev_y = s->mb_y;
609 if (ff_h263_resync(s) < 0)
611 if (prev_y * s->mb_width + prev_x < s->mb_y * s->mb_width + s->mb_x)
612 s->er.error_occurred = 1;
615 if (s->msmpeg4_version < 4 && s->h263_pred)
616 ff_mpeg4_clean_buffers(s);
618 if (decode_slice(s) < 0)
619 slice_ret = AVERROR_INVALIDDATA;
622 if (s->msmpeg4_version && s->msmpeg4_version < 4 &&
623 s->pict_type == AV_PICTURE_TYPE_I)
624 if (!CONFIG_MSMPEG4_DECODER ||
625 ff_msmpeg4_decode_ext_header(s, buf_size) < 0)
626 s->er.error_status_table[s->mb_num - 1] = ER_MB_ERROR;
628 av_assert1(s->bitstream_buffer_size == 0);
630 ff_er_frame_end(&s->er);
632 if (avctx->hwaccel) {
633 ret = avctx->hwaccel->end_frame(avctx);
640 if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4)
641 ff_mpeg4_frame_end(avctx, buf, buf_size);
643 if (!s->divx_packed && avctx->hwaccel)
644 ff_thread_finish_setup(avctx);
646 av_assert1(s->current_picture.f->pict_type == s->current_picture_ptr->f->pict_type);
647 av_assert1(s->current_picture.f->pict_type == s->pict_type);
648 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
649 if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0)
651 ff_print_debug_info(s, s->current_picture_ptr, pict);
652 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG1);
653 } else if (s->last_picture_ptr != NULL) {
654 if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0)
656 ff_print_debug_info(s, s->last_picture_ptr, pict);
657 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG1);
660 if (s->last_picture_ptr || s->low_delay) {
661 if ( pict->format == AV_PIX_FMT_YUV420P
662 && (s->codec_tag == AV_RL32("GEOV") || s->codec_tag == AV_RL32("GEOX"))) {
664 av_frame_make_writable(pict);
665 for (p=0; p<3; p++) {
666 int w = FF_CEIL_RSHIFT(pict-> width, !!p);
667 int h = FF_CEIL_RSHIFT(pict->height, !!p);
668 int linesize = pict->linesize[p];
669 for (y=0; y<(h>>1); y++)
672 pict->data[p][x + y*linesize],
673 pict->data[p][x + (h-1-y)*linesize]);
679 if (slice_ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE))
682 return get_consumed_bytes(s, buf_size);
685 const enum AVPixelFormat ff_h263_hwaccel_pixfmt_list_420[] = {
686 #if CONFIG_H263_VAAPI_HWACCEL || CONFIG_MPEG4_VAAPI_HWACCEL
687 AV_PIX_FMT_VAAPI_VLD,
689 #if CONFIG_H263_VDPAU_HWACCEL || CONFIG_MPEG4_VDPAU_HWACCEL
696 AVCodec ff_h263_decoder = {
698 .long_name = NULL_IF_CONFIG_SMALL("H.263 / H.263-1996, H.263+ / H.263-1998 / H.263 version 2"),
699 .type = AVMEDIA_TYPE_VIDEO,
700 .id = AV_CODEC_ID_H263,
701 .priv_data_size = sizeof(MpegEncContext),
702 .init = ff_h263_decode_init,
703 .close = ff_h263_decode_end,
704 .decode = ff_h263_decode_frame,
705 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
706 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
707 .flush = ff_mpeg_flush,
709 .pix_fmts = ff_h263_hwaccel_pixfmt_list_420,
712 AVCodec ff_h263p_decoder = {
714 .long_name = NULL_IF_CONFIG_SMALL("H.263 / H.263-1996, H.263+ / H.263-1998 / H.263 version 2"),
715 .type = AVMEDIA_TYPE_VIDEO,
716 .id = AV_CODEC_ID_H263P,
717 .priv_data_size = sizeof(MpegEncContext),
718 .init = ff_h263_decode_init,
719 .close = ff_h263_decode_end,
720 .decode = ff_h263_decode_frame,
721 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
722 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
723 .flush = ff_mpeg_flush,
725 .pix_fmts = ff_h263_hwaccel_pixfmt_list_420,