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 = avctx->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;
115 avctx->hwaccel = ff_find_hwaccel(avctx);
117 if (avctx->stream_codec_tag == AV_RL32("l263") && avctx->extradata_size == 56 && avctx->extradata[0] == 1)
120 /* for h263, we allocate the images after having read the header */
121 if (avctx->codec->id != AV_CODEC_ID_H263 &&
122 avctx->codec->id != AV_CODEC_ID_H263P &&
123 avctx->codec->id != AV_CODEC_ID_MPEG4)
124 if ((ret = ff_MPV_common_init(s)) < 0)
127 ff_h263dsp_init(&s->h263dsp);
128 ff_h263_decode_init_vlc();
133 av_cold int ff_h263_decode_end(AVCodecContext *avctx)
135 MpegEncContext *s = avctx->priv_data;
137 ff_MPV_common_end(s);
142 * Return the number of bytes consumed for building the current frame.
144 static int get_consumed_bytes(MpegEncContext *s, int buf_size)
146 int pos = (get_bits_count(&s->gb) + 7) >> 3;
148 if (s->divx_packed || s->avctx->hwaccel) {
149 /* We would have to scan through the whole buf to handle the weird
152 } else if (s->flags & CODEC_FLAG_TRUNCATED) {
153 pos -= s->parse_context.last_index;
154 // padding is not really read so this might be -1
159 // avoid infinite loops (maybe not needed...)
163 if (pos + 10 > buf_size)
170 static int decode_slice(MpegEncContext *s)
172 const int part_mask = s->partitioned_frame
173 ? (ER_AC_END | ER_AC_ERROR) : 0x7F;
174 const int mb_size = 16 >> s->avctx->lowres;
177 s->last_resync_gb = s->gb;
178 s->first_slice_line = 1;
179 s->resync_mb_x = s->mb_x;
180 s->resync_mb_y = s->mb_y;
182 ff_set_qscale(s, s->qscale);
184 if (s->avctx->hwaccel) {
185 const uint8_t *start = s->gb.buffer + get_bits_count(&s->gb) / 8;
186 ret = s->avctx->hwaccel->decode_slice(s->avctx, start, s->gb.buffer_end - start);
187 // ensure we exit decode loop
188 s->mb_y = s->mb_height;
192 if (s->partitioned_frame) {
193 const int qscale = s->qscale;
195 if (CONFIG_MPEG4_DECODER && s->codec_id == AV_CODEC_ID_MPEG4)
196 if ((ret = ff_mpeg4_decode_partitions(s->avctx->priv_data)) < 0)
199 /* restore variables which were modified */
200 s->first_slice_line = 1;
201 s->mb_x = s->resync_mb_x;
202 s->mb_y = s->resync_mb_y;
203 ff_set_qscale(s, qscale);
206 for (; s->mb_y < s->mb_height; s->mb_y++) {
207 /* per-row end of slice checks */
208 if (s->msmpeg4_version) {
209 if (s->resync_mb_y + s->slice_height == s->mb_y) {
210 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
211 s->mb_x - 1, s->mb_y, ER_MB_END);
217 if (s->msmpeg4_version == 1) {
223 ff_init_block_index(s);
224 for (; s->mb_x < s->mb_width; s->mb_x++) {
227 ff_update_block_index(s);
229 if (s->resync_mb_x == s->mb_x && s->resync_mb_y + 1 == s->mb_y)
230 s->first_slice_line = 0;
234 s->mv_dir = MV_DIR_FORWARD;
235 s->mv_type = MV_TYPE_16X16;
236 av_dlog(s, "%d %d %06X\n",
237 ret, get_bits_count(&s->gb), show_bits(&s->gb, 24));
238 ret = s->decode_mb(s, s->block);
240 if (s->pict_type != AV_PICTURE_TYPE_B)
241 ff_h263_update_motion_val(s);
244 const int xy = s->mb_x + s->mb_y * s->mb_stride;
245 if (ret == SLICE_END) {
246 ff_MPV_decode_mb(s, s->block);
248 ff_h263_loop_filter(s);
250 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
251 s->mb_x, s->mb_y, ER_MB_END & part_mask);
253 s->padding_bug_score--;
255 if (++s->mb_x >= s->mb_width) {
257 ff_mpeg_draw_horiz_band(s, s->mb_y * mb_size, mb_size);
258 ff_MPV_report_decode_progress(s);
262 } else if (ret == SLICE_NOEND) {
263 av_log(s->avctx, AV_LOG_ERROR,
264 "Slice mismatch at MB: %d\n", xy);
265 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
266 s->mb_x + 1, s->mb_y,
267 ER_MB_END & part_mask);
268 return AVERROR_INVALIDDATA;
270 av_log(s->avctx, AV_LOG_ERROR, "Error at MB: %d\n", xy);
271 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
272 s->mb_x, s->mb_y, ER_MB_ERROR & part_mask);
274 return AVERROR_INVALIDDATA;
277 ff_MPV_decode_mb(s, s->block);
279 ff_h263_loop_filter(s);
282 ff_mpeg_draw_horiz_band(s, s->mb_y * mb_size, mb_size);
283 ff_MPV_report_decode_progress(s);
288 av_assert1(s->mb_x == 0 && s->mb_y == s->mb_height);
290 if (s->codec_id == AV_CODEC_ID_MPEG4 &&
291 (s->workaround_bugs & FF_BUG_AUTODETECT) &&
292 get_bits_left(&s->gb) >= 48 &&
293 show_bits(&s->gb, 24) == 0x4010 &&
294 !s->data_partitioning)
295 s->padding_bug_score += 32;
297 /* try to detect the padding bug */
298 if (s->codec_id == AV_CODEC_ID_MPEG4 &&
299 (s->workaround_bugs & FF_BUG_AUTODETECT) &&
300 get_bits_left(&s->gb) >= 0 &&
301 get_bits_left(&s->gb) < 137 &&
302 !s->data_partitioning) {
303 const int bits_count = get_bits_count(&s->gb);
304 const int bits_left = s->gb.size_in_bits - bits_count;
306 if (bits_left == 0) {
307 s->padding_bug_score += 16;
308 } else if (bits_left != 1) {
309 int v = show_bits(&s->gb, 8);
310 v |= 0x7F >> (7 - (bits_count & 7));
312 if (v == 0x7F && bits_left <= 8)
313 s->padding_bug_score--;
314 else if (v == 0x7F && ((get_bits_count(&s->gb) + 8) & 8) &&
316 s->padding_bug_score += 4;
318 s->padding_bug_score++;
322 if (s->codec_id == AV_CODEC_ID_H263 &&
323 (s->workaround_bugs & FF_BUG_AUTODETECT) &&
324 get_bits_left(&s->gb) >= 8 &&
325 get_bits_left(&s->gb) < 300 &&
326 s->pict_type == AV_PICTURE_TYPE_I &&
327 show_bits(&s->gb, 8) == 0 &&
328 !s->data_partitioning) {
330 s->padding_bug_score += 32;
333 if (s->workaround_bugs & FF_BUG_AUTODETECT) {
334 if (s->padding_bug_score > -2 && !s->data_partitioning)
335 s->workaround_bugs |= FF_BUG_NO_PADDING;
337 s->workaround_bugs &= ~FF_BUG_NO_PADDING;
340 // handle formats which don't have unique end markers
341 if (s->msmpeg4_version || (s->workaround_bugs & FF_BUG_NO_PADDING)) { // FIXME perhaps solve this more cleanly
342 int left = get_bits_left(&s->gb);
345 /* no markers in M$ crap */
346 if (s->msmpeg4_version && s->pict_type == AV_PICTURE_TYPE_I)
349 /* buggy padding but the frame should still end approximately at
350 * the bitstream end */
351 if ((s->workaround_bugs & FF_BUG_NO_PADDING) &&
352 (s->err_recognition & (AV_EF_BUFFER|AV_EF_AGGRESSIVE)))
354 else if ((s->workaround_bugs & FF_BUG_NO_PADDING))
355 max_extra += 256 * 256 * 256 * 64;
357 if (left > max_extra)
358 av_log(s->avctx, AV_LOG_ERROR,
359 "discarding %d junk bits at end, next would be %X\n",
360 left, show_bits(&s->gb, 24));
362 av_log(s->avctx, AV_LOG_ERROR, "overreading %d bits\n", -left);
364 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
365 s->mb_x - 1, s->mb_y, ER_MB_END);
370 av_log(s->avctx, AV_LOG_ERROR,
371 "slice end not reached but screenspace end (%d left %06X, score= %d)\n",
372 get_bits_left(&s->gb), show_bits(&s->gb, 24), s->padding_bug_score);
374 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
375 ER_MB_END & part_mask);
377 return AVERROR_INVALIDDATA;
380 int ff_h263_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
383 const uint8_t *buf = avpkt->data;
384 int buf_size = avpkt->size;
385 MpegEncContext *s = avctx->priv_data;
388 AVFrame *pict = data;
390 s->flags = avctx->flags;
391 s->flags2 = avctx->flags2;
393 /* no supplementary picture */
395 /* special case for last picture */
396 if (s->low_delay == 0 && s->next_picture_ptr) {
397 if ((ret = av_frame_ref(pict, &s->next_picture_ptr->f)) < 0)
399 s->next_picture_ptr = NULL;
407 if (s->flags & CODEC_FLAG_TRUNCATED) {
410 if (CONFIG_MPEG4_DECODER && s->codec_id == AV_CODEC_ID_MPEG4) {
411 next = ff_mpeg4_find_frame_end(&s->parse_context, buf, buf_size);
412 } else if (CONFIG_H263_DECODER && s->codec_id == AV_CODEC_ID_H263) {
413 next = ff_h263_find_frame_end(&s->parse_context, buf, buf_size);
414 } else if (CONFIG_H263P_DECODER && s->codec_id == AV_CODEC_ID_H263P) {
415 next = ff_h263_find_frame_end(&s->parse_context, buf, buf_size);
417 av_log(s->avctx, AV_LOG_ERROR,
418 "this codec does not support truncated bitstreams\n");
419 return AVERROR(ENOSYS);
422 if (ff_combine_frame(&s->parse_context, next, (const uint8_t **)&buf,
428 if (s->divx_packed && s->bitstream_buffer_size) {
430 for(i=0; i < buf_size-3; i++) {
431 if (buf[i]==0 && buf[i+1]==0 && buf[i+2]==1) {
432 if (buf[i+3]==0xB0) {
433 av_log(s->avctx, AV_LOG_WARNING, "Discarding excessive bitstream in packed xvid\n");
434 s->bitstream_buffer_size = 0;
441 if (s->bitstream_buffer_size && (s->divx_packed || buf_size < 20)) // divx 5.01+/xvid frame reorder
442 ret = init_get_bits8(&s->gb, s->bitstream_buffer,
443 s->bitstream_buffer_size);
445 ret = init_get_bits8(&s->gb, buf, buf_size);
447 s->bitstream_buffer_size = 0;
451 if (!s->context_initialized)
452 // we need the idct permutaton for reading a custom matrix
453 if ((ret = ff_MPV_common_init(s)) < 0)
456 /* We need to set current_picture_ptr before reading the header,
457 * otherwise we cannot store anyting in there */
458 if (s->current_picture_ptr == NULL || s->current_picture_ptr->f.data[0]) {
459 int i = ff_find_unused_picture(s, 0);
462 s->current_picture_ptr = &s->picture[i];
466 if (CONFIG_WMV2_DECODER && s->msmpeg4_version == 5) {
467 ret = ff_wmv2_decode_picture_header(s);
468 } else if (CONFIG_MSMPEG4_DECODER && s->msmpeg4_version) {
469 ret = ff_msmpeg4_decode_picture_header(s);
470 } else if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4) {
471 if (s->avctx->extradata_size && s->picture_number == 0) {
474 if (init_get_bits8(&gb, s->avctx->extradata, s->avctx->extradata_size) >= 0 )
475 ff_mpeg4_decode_picture_header(avctx->priv_data, &gb);
477 ret = ff_mpeg4_decode_picture_header(avctx->priv_data, &s->gb);
478 } else if (CONFIG_H263I_DECODER && s->codec_id == AV_CODEC_ID_H263I) {
479 ret = ff_intel_h263_decode_picture_header(s);
480 } else if (CONFIG_FLV_DECODER && s->h263_flv) {
481 ret = ff_flv_decode_picture_header(s);
483 ret = ff_h263_decode_picture_header(s);
486 if (ret < 0 || ret == FRAME_SKIPPED) {
487 if ( s->width != avctx->coded_width
488 || s->height != avctx->coded_height) {
489 av_log(s->avctx, AV_LOG_WARNING, "Reverting picture dimensions change due to header decoding failure\n");
490 s->width = avctx->coded_width;
491 s->height= avctx->coded_height;
494 if (ret == FRAME_SKIPPED)
495 return get_consumed_bytes(s, buf_size);
497 /* skip if the header was thrashed */
499 av_log(s->avctx, AV_LOG_ERROR, "header damaged\n");
503 avctx->has_b_frames = !s->low_delay;
505 if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4) {
506 if (ff_mpeg4_workaround_bugs(avctx) == 1)
510 /* After H263 & mpeg4 header decode we have the height, width,
511 * and other parameters. So then we could init the picture.
512 * FIXME: By the way H263 decoder is evolving it should have
513 * an H263EncContext */
514 if (s->width != avctx->coded_width ||
515 s->height != avctx->coded_height ||
517 /* H.263 could change picture size any time */
518 s->context_reinit = 0;
520 ret = ff_set_dimensions(avctx, s->width, s->height);
524 if ((ret = ff_MPV_common_frame_size_change(s)))
528 if (s->codec_id == AV_CODEC_ID_H263 ||
529 s->codec_id == AV_CODEC_ID_H263P ||
530 s->codec_id == AV_CODEC_ID_H263I)
531 s->gob_index = ff_h263_get_gob_height(s);
533 // for skipping the frame
534 s->current_picture.f.pict_type = s->pict_type;
535 s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
537 /* skip B-frames if we don't have reference frames */
538 if (s->last_picture_ptr == NULL &&
539 (s->pict_type == AV_PICTURE_TYPE_B || s->droppable))
540 return get_consumed_bytes(s, buf_size);
541 if ((avctx->skip_frame >= AVDISCARD_NONREF &&
542 s->pict_type == AV_PICTURE_TYPE_B) ||
543 (avctx->skip_frame >= AVDISCARD_NONKEY &&
544 s->pict_type != AV_PICTURE_TYPE_I) ||
545 avctx->skip_frame >= AVDISCARD_ALL)
546 return get_consumed_bytes(s, buf_size);
548 if (s->next_p_frame_damaged) {
549 if (s->pict_type == AV_PICTURE_TYPE_B)
550 return get_consumed_bytes(s, buf_size);
552 s->next_p_frame_damaged = 0;
555 if ((!s->no_rounding) || s->pict_type == AV_PICTURE_TYPE_B) {
556 s->me.qpel_put = s->dsp.put_qpel_pixels_tab;
557 s->me.qpel_avg = s->dsp.avg_qpel_pixels_tab;
559 s->me.qpel_put = s->dsp.put_no_rnd_qpel_pixels_tab;
560 s->me.qpel_avg = s->dsp.avg_qpel_pixels_tab;
563 if ((ret = ff_MPV_frame_start(s, avctx)) < 0)
566 if (!s->divx_packed && !avctx->hwaccel)
567 ff_thread_finish_setup(avctx);
569 if (CONFIG_MPEG4_VDPAU_DECODER && (s->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU)) {
570 ff_vdpau_mpeg4_decode_picture(s, s->gb.buffer, s->gb.buffer_end - s->gb.buffer);
574 if (avctx->hwaccel) {
575 ret = avctx->hwaccel->start_frame(avctx, s->gb.buffer,
576 s->gb.buffer_end - s->gb.buffer);
581 ff_mpeg_er_frame_start(s);
583 /* the second part of the wmv2 header contains the MB skip bits which
584 * are stored in current_picture->mb_type which is not available before
585 * ff_MPV_frame_start() */
586 if (CONFIG_WMV2_DECODER && s->msmpeg4_version == 5) {
587 ret = ff_wmv2_decode_secondary_picture_header(s);
594 /* decode each macroblock */
598 slice_ret = decode_slice(s);
599 while (s->mb_y < s->mb_height) {
600 if (s->msmpeg4_version) {
601 if (s->slice_height == 0 || s->mb_x != 0 ||
602 (s->mb_y % s->slice_height) != 0 || get_bits_left(&s->gb) < 0)
605 int prev_x = s->mb_x, prev_y = s->mb_y;
606 if (ff_h263_resync(s) < 0)
608 if (prev_y * s->mb_width + prev_x < s->mb_y * s->mb_width + s->mb_x)
609 s->er.error_occurred = 1;
612 if (s->msmpeg4_version < 4 && s->h263_pred)
613 ff_mpeg4_clean_buffers(s);
615 if (decode_slice(s) < 0)
616 slice_ret = AVERROR_INVALIDDATA;
619 if (s->msmpeg4_version && s->msmpeg4_version < 4 &&
620 s->pict_type == AV_PICTURE_TYPE_I)
621 if (!CONFIG_MSMPEG4_DECODER ||
622 ff_msmpeg4_decode_ext_header(s, buf_size) < 0)
623 s->er.error_status_table[s->mb_num - 1] = ER_MB_ERROR;
625 av_assert1(s->bitstream_buffer_size == 0);
627 ff_er_frame_end(&s->er);
629 if (avctx->hwaccel) {
630 ret = avctx->hwaccel->end_frame(avctx);
637 if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4)
638 ff_mpeg4_frame_end(avctx, buf, buf_size);
640 if (!s->divx_packed && avctx->hwaccel)
641 ff_thread_finish_setup(avctx);
643 av_assert1(s->current_picture.f.pict_type == s->current_picture_ptr->f.pict_type);
644 av_assert1(s->current_picture.f.pict_type == s->pict_type);
645 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
646 if ((ret = av_frame_ref(pict, &s->current_picture_ptr->f)) < 0)
648 ff_print_debug_info(s, s->current_picture_ptr, pict);
649 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG1);
650 } else if (s->last_picture_ptr != NULL) {
651 if ((ret = av_frame_ref(pict, &s->last_picture_ptr->f)) < 0)
653 ff_print_debug_info(s, s->last_picture_ptr, pict);
654 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG1);
657 if (s->last_picture_ptr || s->low_delay) {
658 if ( pict->format == AV_PIX_FMT_YUV420P
659 && (s->codec_tag == AV_RL32("GEOV") || s->codec_tag == AV_RL32("GEOX"))) {
661 av_frame_make_writable(pict);
662 for (p=0; p<3; p++) {
663 int w = FF_CEIL_RSHIFT(pict-> width, !!p);
664 int h = FF_CEIL_RSHIFT(pict->height, !!p);
665 int linesize = pict->linesize[p];
666 for (y=0; y<(h>>1); y++)
669 pict->data[p][x + y*linesize],
670 pict->data[p][x + (h-1-y)*linesize]);
676 if (slice_ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE))
679 return get_consumed_bytes(s, buf_size);
682 const enum AVPixelFormat ff_h263_hwaccel_pixfmt_list_420[] = {
684 AV_PIX_FMT_VAAPI_VLD,
693 AVCodec ff_h263_decoder = {
695 .long_name = NULL_IF_CONFIG_SMALL("H.263 / H.263-1996, H.263+ / H.263-1998 / H.263 version 2"),
696 .type = AVMEDIA_TYPE_VIDEO,
697 .id = AV_CODEC_ID_H263,
698 .priv_data_size = sizeof(MpegEncContext),
699 .init = ff_h263_decode_init,
700 .close = ff_h263_decode_end,
701 .decode = ff_h263_decode_frame,
702 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
703 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
704 .flush = ff_mpeg_flush,
706 .pix_fmts = ff_h263_hwaccel_pixfmt_list_420,
709 AVCodec ff_h263p_decoder = {
711 .long_name = NULL_IF_CONFIG_SMALL("H.263 / H.263-1996, H.263+ / H.263-1998 / H.263 version 2"),
712 .type = AVMEDIA_TYPE_VIDEO,
713 .id = AV_CODEC_ID_H263P,
714 .priv_data_size = sizeof(MpegEncContext),
715 .init = ff_h263_decode_init,
716 .close = ff_h263_decode_end,
717 .decode = ff_h263_decode_frame,
718 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
719 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
720 .flush = ff_mpeg_flush,
722 .pix_fmts = ff_h263_hwaccel_pixfmt_list_420,