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"
38 #include "mpeg4video.h"
39 #include "mpeg4video_parser.h"
40 #include "mpegvideo.h"
43 #include "vdpau_internal.h"
46 av_cold int ff_h263_decode_init(AVCodecContext *avctx)
48 MpegEncContext *s = avctx->priv_data;
51 s->out_format = FMT_H263;
54 ff_mpv_decode_defaults(s);
55 ff_mpv_decode_init(s, avctx);
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) {
124 if ((ret = ff_mpv_common_init(s)) < 0)
128 ff_h263dsp_init(&s->h263dsp);
129 ff_qpeldsp_init(&s->qdsp);
130 ff_h263_decode_init_vlc();
135 av_cold int ff_h263_decode_end(AVCodecContext *avctx)
137 MpegEncContext *s = avctx->priv_data;
139 ff_mpv_common_end(s);
144 * Return the number of bytes consumed for building the current frame.
146 static int get_consumed_bytes(MpegEncContext *s, int buf_size)
148 int pos = (get_bits_count(&s->gb) + 7) >> 3;
150 if (s->divx_packed || s->avctx->hwaccel) {
151 /* We would have to scan through the whole buf to handle the weird
154 } else if (s->flags & CODEC_FLAG_TRUNCATED) {
155 pos -= s->parse_context.last_index;
156 // padding is not really read so this might be -1
161 // avoid infinite loops (maybe not needed...)
165 if (pos + 10 > buf_size)
172 static int decode_slice(MpegEncContext *s)
174 const int part_mask = s->partitioned_frame
175 ? (ER_AC_END | ER_AC_ERROR) : 0x7F;
176 const int mb_size = 16 >> s->avctx->lowres;
179 s->last_resync_gb = s->gb;
180 s->first_slice_line = 1;
181 s->resync_mb_x = s->mb_x;
182 s->resync_mb_y = s->mb_y;
184 ff_set_qscale(s, s->qscale);
186 if (s->avctx->hwaccel) {
187 const uint8_t *start = s->gb.buffer + get_bits_count(&s->gb) / 8;
188 ret = s->avctx->hwaccel->decode_slice(s->avctx, start, s->gb.buffer_end - start);
189 // ensure we exit decode loop
190 s->mb_y = s->mb_height;
194 if (s->partitioned_frame) {
195 const int qscale = s->qscale;
197 if (CONFIG_MPEG4_DECODER && s->codec_id == AV_CODEC_ID_MPEG4)
198 if ((ret = ff_mpeg4_decode_partitions(s->avctx->priv_data)) < 0)
201 /* restore variables which were modified */
202 s->first_slice_line = 1;
203 s->mb_x = s->resync_mb_x;
204 s->mb_y = s->resync_mb_y;
205 ff_set_qscale(s, qscale);
208 for (; s->mb_y < s->mb_height; s->mb_y++) {
209 /* per-row end of slice checks */
210 if (s->msmpeg4_version) {
211 if (s->resync_mb_y + s->slice_height == s->mb_y) {
212 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
213 s->mb_x - 1, s->mb_y, ER_MB_END);
219 if (s->msmpeg4_version == 1) {
225 ff_init_block_index(s);
226 for (; s->mb_x < s->mb_width; s->mb_x++) {
229 ff_update_block_index(s);
231 if (s->resync_mb_x == s->mb_x && s->resync_mb_y + 1 == s->mb_y)
232 s->first_slice_line = 0;
236 s->mv_dir = MV_DIR_FORWARD;
237 s->mv_type = MV_TYPE_16X16;
238 av_dlog(s, "%d %d %06X\n",
239 ret, get_bits_count(&s->gb), show_bits(&s->gb, 24));
241 tprintf(NULL, "Decoding MB at %dx%d\n", s->mb_x, s->mb_y);
242 ret = s->decode_mb(s, s->block);
244 if (s->pict_type != AV_PICTURE_TYPE_B)
245 ff_h263_update_motion_val(s);
248 const int xy = s->mb_x + s->mb_y * s->mb_stride;
249 if (ret == SLICE_END) {
250 ff_mpv_decode_mb(s, s->block);
252 ff_h263_loop_filter(s);
254 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
255 s->mb_x, s->mb_y, ER_MB_END & part_mask);
257 s->padding_bug_score--;
259 if (++s->mb_x >= s->mb_width) {
261 ff_mpeg_draw_horiz_band(s, s->mb_y * mb_size, mb_size);
262 ff_mpv_report_decode_progress(s);
266 } else if (ret == SLICE_NOEND) {
267 av_log(s->avctx, AV_LOG_ERROR,
268 "Slice mismatch at MB: %d\n", xy);
269 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
270 s->mb_x + 1, s->mb_y,
271 ER_MB_END & part_mask);
272 return AVERROR_INVALIDDATA;
274 av_log(s->avctx, AV_LOG_ERROR, "Error at MB: %d\n", xy);
275 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
276 s->mb_x, s->mb_y, ER_MB_ERROR & part_mask);
278 if (s->err_recognition & AV_EF_IGNORE_ERR)
280 return AVERROR_INVALIDDATA;
283 ff_mpv_decode_mb(s, s->block);
285 ff_h263_loop_filter(s);
288 ff_mpeg_draw_horiz_band(s, s->mb_y * mb_size, mb_size);
289 ff_mpv_report_decode_progress(s);
294 av_assert1(s->mb_x == 0 && s->mb_y == s->mb_height);
296 if (s->codec_id == AV_CODEC_ID_MPEG4 &&
297 (s->workaround_bugs & FF_BUG_AUTODETECT) &&
298 get_bits_left(&s->gb) >= 48 &&
299 show_bits(&s->gb, 24) == 0x4010 &&
300 !s->data_partitioning)
301 s->padding_bug_score += 32;
303 /* try to detect the padding bug */
304 if (s->codec_id == AV_CODEC_ID_MPEG4 &&
305 (s->workaround_bugs & FF_BUG_AUTODETECT) &&
306 get_bits_left(&s->gb) >= 0 &&
307 get_bits_left(&s->gb) < 137 &&
308 !s->data_partitioning) {
309 const int bits_count = get_bits_count(&s->gb);
310 const int bits_left = s->gb.size_in_bits - bits_count;
312 if (bits_left == 0) {
313 s->padding_bug_score += 16;
314 } else if (bits_left != 1) {
315 int v = show_bits(&s->gb, 8);
316 v |= 0x7F >> (7 - (bits_count & 7));
318 if (v == 0x7F && bits_left <= 8)
319 s->padding_bug_score--;
320 else if (v == 0x7F && ((get_bits_count(&s->gb) + 8) & 8) &&
322 s->padding_bug_score += 4;
324 s->padding_bug_score++;
328 if (s->codec_id == AV_CODEC_ID_H263 &&
329 (s->workaround_bugs & FF_BUG_AUTODETECT) &&
330 get_bits_left(&s->gb) >= 8 &&
331 get_bits_left(&s->gb) < 300 &&
332 s->pict_type == AV_PICTURE_TYPE_I &&
333 show_bits(&s->gb, 8) == 0 &&
334 !s->data_partitioning) {
336 s->padding_bug_score += 32;
339 if (s->codec_id == AV_CODEC_ID_H263 &&
340 (s->workaround_bugs & FF_BUG_AUTODETECT) &&
341 get_bits_left(&s->gb) >= 64 &&
342 AV_RB64(s->gb.buffer_end - 8) == 0xCDCDCDCDFC7F0000) {
344 s->padding_bug_score += 32;
347 if (s->workaround_bugs & FF_BUG_AUTODETECT) {
349 (s->padding_bug_score > -2 && !s->data_partitioning))
350 s->workaround_bugs |= FF_BUG_NO_PADDING;
352 s->workaround_bugs &= ~FF_BUG_NO_PADDING;
355 // handle formats which don't have unique end markers
356 if (s->msmpeg4_version || (s->workaround_bugs & FF_BUG_NO_PADDING)) { // FIXME perhaps solve this more cleanly
357 int left = get_bits_left(&s->gb);
360 /* no markers in M$ crap */
361 if (s->msmpeg4_version && s->pict_type == AV_PICTURE_TYPE_I)
364 /* buggy padding but the frame should still end approximately at
365 * the bitstream end */
366 if ((s->workaround_bugs & FF_BUG_NO_PADDING) &&
367 (s->err_recognition & (AV_EF_BUFFER|AV_EF_AGGRESSIVE)))
369 else if ((s->workaround_bugs & FF_BUG_NO_PADDING))
370 max_extra += 256 * 256 * 256 * 64;
372 if (left > max_extra)
373 av_log(s->avctx, AV_LOG_ERROR,
374 "discarding %d junk bits at end, next would be %X\n",
375 left, show_bits(&s->gb, 24));
377 av_log(s->avctx, AV_LOG_ERROR, "overreading %d bits\n", -left);
379 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
380 s->mb_x - 1, s->mb_y, ER_MB_END);
385 av_log(s->avctx, AV_LOG_ERROR,
386 "slice end not reached but screenspace end (%d left %06X, score= %d)\n",
387 get_bits_left(&s->gb), show_bits(&s->gb, 24), s->padding_bug_score);
389 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
390 ER_MB_END & part_mask);
392 return AVERROR_INVALIDDATA;
395 int ff_h263_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
398 const uint8_t *buf = avpkt->data;
399 int buf_size = avpkt->size;
400 MpegEncContext *s = avctx->priv_data;
403 AVFrame *pict = data;
405 s->flags = avctx->flags;
406 s->flags2 = avctx->flags2;
408 /* no supplementary picture */
410 /* special case for last picture */
411 if (s->low_delay == 0 && s->next_picture_ptr) {
412 if ((ret = av_frame_ref(pict, s->next_picture_ptr->f)) < 0)
414 s->next_picture_ptr = NULL;
422 if (s->flags & CODEC_FLAG_TRUNCATED) {
425 if (CONFIG_MPEG4_DECODER && s->codec_id == AV_CODEC_ID_MPEG4) {
426 next = ff_mpeg4_find_frame_end(&s->parse_context, buf, buf_size);
427 } else if (CONFIG_H263_DECODER && s->codec_id == AV_CODEC_ID_H263) {
428 next = ff_h263_find_frame_end(&s->parse_context, buf, buf_size);
429 } else if (CONFIG_H263P_DECODER && s->codec_id == AV_CODEC_ID_H263P) {
430 next = ff_h263_find_frame_end(&s->parse_context, buf, buf_size);
432 av_log(s->avctx, AV_LOG_ERROR,
433 "this codec does not support truncated bitstreams\n");
434 return AVERROR(ENOSYS);
437 if (ff_combine_frame(&s->parse_context, next, (const uint8_t **)&buf,
443 if (s->divx_packed && s->bitstream_buffer_size) {
445 for(i=0; i < buf_size-3; i++) {
446 if (buf[i]==0 && buf[i+1]==0 && buf[i+2]==1) {
447 if (buf[i+3]==0xB0) {
448 av_log(s->avctx, AV_LOG_WARNING, "Discarding excessive bitstream in packed xvid\n");
449 s->bitstream_buffer_size = 0;
456 if (s->bitstream_buffer_size && (s->divx_packed || buf_size < 20)) // divx 5.01+/xvid frame reorder
457 ret = init_get_bits8(&s->gb, s->bitstream_buffer,
458 s->bitstream_buffer_size);
460 ret = init_get_bits8(&s->gb, buf, buf_size);
462 s->bitstream_buffer_size = 0;
466 if (!s->context_initialized)
467 // we need the idct permutaton for reading a custom matrix
471 if (CONFIG_WMV2_DECODER && s->msmpeg4_version == 5) {
472 ret = ff_wmv2_decode_picture_header(s);
473 } else if (CONFIG_MSMPEG4_DECODER && s->msmpeg4_version) {
474 ret = ff_msmpeg4_decode_picture_header(s);
475 } else if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4) {
476 if (s->avctx->extradata_size && s->picture_number == 0) {
479 if (init_get_bits8(&gb, s->avctx->extradata, s->avctx->extradata_size) >= 0 )
480 ff_mpeg4_decode_picture_header(avctx->priv_data, &gb);
482 ret = ff_mpeg4_decode_picture_header(avctx->priv_data, &s->gb);
483 } else if (CONFIG_H263I_DECODER && s->codec_id == AV_CODEC_ID_H263I) {
484 ret = ff_intel_h263_decode_picture_header(s);
485 } else if (CONFIG_FLV_DECODER && s->h263_flv) {
486 ret = ff_flv_decode_picture_header(s);
488 ret = ff_h263_decode_picture_header(s);
491 if (ret < 0 || ret == FRAME_SKIPPED) {
492 if ( s->width != avctx->coded_width
493 || s->height != avctx->coded_height) {
494 av_log(s->avctx, AV_LOG_WARNING, "Reverting picture dimensions change due to header decoding failure\n");
495 s->width = avctx->coded_width;
496 s->height= avctx->coded_height;
499 if (ret == FRAME_SKIPPED)
500 return get_consumed_bytes(s, buf_size);
502 /* skip if the header was thrashed */
504 av_log(s->avctx, AV_LOG_ERROR, "header damaged\n");
508 if (!s->context_initialized)
509 if ((ret = ff_mpv_common_init(s)) < 0)
512 if (!s->current_picture_ptr || s->current_picture_ptr->f->data[0]) {
513 int i = ff_find_unused_picture(s, 0);
516 s->current_picture_ptr = &s->picture[i];
519 avctx->has_b_frames = !s->low_delay;
521 if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4) {
522 if (ff_mpeg4_workaround_bugs(avctx) == 1)
526 /* After H263 & mpeg4 header decode we have the height, width,
527 * and other parameters. So then we could init the picture.
528 * FIXME: By the way H263 decoder is evolving it should have
529 * an H263EncContext */
530 if (s->width != avctx->coded_width ||
531 s->height != avctx->coded_height ||
533 /* H.263 could change picture size any time */
534 s->context_reinit = 0;
536 ret = ff_set_dimensions(avctx, s->width, s->height);
540 ff_set_sar(avctx, avctx->sample_aspect_ratio);
542 if ((ret = ff_mpv_common_frame_size_change(s)))
546 if (s->codec_id == AV_CODEC_ID_H263 ||
547 s->codec_id == AV_CODEC_ID_H263P ||
548 s->codec_id == AV_CODEC_ID_H263I)
549 s->gob_index = ff_h263_get_gob_height(s);
551 // for skipping the frame
552 s->current_picture.f->pict_type = s->pict_type;
553 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
555 /* skip B-frames if we don't have reference frames */
556 if (!s->last_picture_ptr &&
557 (s->pict_type == AV_PICTURE_TYPE_B || s->droppable))
558 return get_consumed_bytes(s, buf_size);
559 if ((avctx->skip_frame >= AVDISCARD_NONREF &&
560 s->pict_type == AV_PICTURE_TYPE_B) ||
561 (avctx->skip_frame >= AVDISCARD_NONKEY &&
562 s->pict_type != AV_PICTURE_TYPE_I) ||
563 avctx->skip_frame >= AVDISCARD_ALL)
564 return get_consumed_bytes(s, buf_size);
566 if (s->next_p_frame_damaged) {
567 if (s->pict_type == AV_PICTURE_TYPE_B)
568 return get_consumed_bytes(s, buf_size);
570 s->next_p_frame_damaged = 0;
573 if ((!s->no_rounding) || s->pict_type == AV_PICTURE_TYPE_B) {
574 s->me.qpel_put = s->qdsp.put_qpel_pixels_tab;
575 s->me.qpel_avg = s->qdsp.avg_qpel_pixels_tab;
577 s->me.qpel_put = s->qdsp.put_no_rnd_qpel_pixels_tab;
578 s->me.qpel_avg = s->qdsp.avg_qpel_pixels_tab;
581 if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
584 if (!s->divx_packed && !avctx->hwaccel)
585 ff_thread_finish_setup(avctx);
587 if (CONFIG_MPEG4_VDPAU_DECODER && (s->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU)) {
588 ff_vdpau_mpeg4_decode_picture(avctx->priv_data, s->gb.buffer, s->gb.buffer_end - s->gb.buffer);
592 if (avctx->hwaccel) {
593 ret = avctx->hwaccel->start_frame(avctx, s->gb.buffer,
594 s->gb.buffer_end - s->gb.buffer);
599 ff_mpeg_er_frame_start(s);
601 /* the second part of the wmv2 header contains the MB skip bits which
602 * are stored in current_picture->mb_type which is not available before
603 * ff_mpv_frame_start() */
604 if (CONFIG_WMV2_DECODER && s->msmpeg4_version == 5) {
605 ret = ff_wmv2_decode_secondary_picture_header(s);
612 /* decode each macroblock */
616 slice_ret = decode_slice(s);
617 while (s->mb_y < s->mb_height) {
618 if (s->msmpeg4_version) {
619 if (s->slice_height == 0 || s->mb_x != 0 ||
620 (s->mb_y % s->slice_height) != 0 || get_bits_left(&s->gb) < 0)
623 int prev_x = s->mb_x, prev_y = s->mb_y;
624 if (ff_h263_resync(s) < 0)
626 if (prev_y * s->mb_width + prev_x < s->mb_y * s->mb_width + s->mb_x)
627 s->er.error_occurred = 1;
630 if (s->msmpeg4_version < 4 && s->h263_pred)
631 ff_mpeg4_clean_buffers(s);
633 if (decode_slice(s) < 0)
634 slice_ret = AVERROR_INVALIDDATA;
637 if (s->msmpeg4_version && s->msmpeg4_version < 4 &&
638 s->pict_type == AV_PICTURE_TYPE_I)
639 if (!CONFIG_MSMPEG4_DECODER ||
640 ff_msmpeg4_decode_ext_header(s, buf_size) < 0)
641 s->er.error_status_table[s->mb_num - 1] = ER_MB_ERROR;
643 av_assert1(s->bitstream_buffer_size == 0);
645 ff_er_frame_end(&s->er);
647 if (avctx->hwaccel) {
648 ret = avctx->hwaccel->end_frame(avctx);
655 if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4)
656 ff_mpeg4_frame_end(avctx, buf, buf_size);
658 if (!s->divx_packed && avctx->hwaccel)
659 ff_thread_finish_setup(avctx);
661 av_assert1(s->current_picture.f->pict_type == s->current_picture_ptr->f->pict_type);
662 av_assert1(s->current_picture.f->pict_type == s->pict_type);
663 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
664 if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0)
666 ff_print_debug_info(s, s->current_picture_ptr, pict);
667 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG1);
668 } else if (s->last_picture_ptr) {
669 if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0)
671 ff_print_debug_info(s, s->last_picture_ptr, pict);
672 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG1);
675 if (s->last_picture_ptr || s->low_delay) {
676 if ( pict->format == AV_PIX_FMT_YUV420P
677 && (s->codec_tag == AV_RL32("GEOV") || s->codec_tag == AV_RL32("GEOX"))) {
679 av_frame_make_writable(pict);
680 for (p=0; p<3; p++) {
681 int w = FF_CEIL_RSHIFT(pict-> width, !!p);
682 int h = FF_CEIL_RSHIFT(pict->height, !!p);
683 int linesize = pict->linesize[p];
684 for (y=0; y<(h>>1); y++)
687 pict->data[p][x + y*linesize],
688 pict->data[p][x + (h-1-y)*linesize]);
694 if (slice_ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE))
697 return get_consumed_bytes(s, buf_size);
700 const enum AVPixelFormat ff_h263_hwaccel_pixfmt_list_420[] = {
701 #if CONFIG_H263_VAAPI_HWACCEL || CONFIG_MPEG4_VAAPI_HWACCEL
702 AV_PIX_FMT_VAAPI_VLD,
704 #if CONFIG_H263_VDPAU_HWACCEL || CONFIG_MPEG4_VDPAU_HWACCEL
711 AVCodec ff_h263_decoder = {
713 .long_name = NULL_IF_CONFIG_SMALL("H.263 / H.263-1996, H.263+ / H.263-1998 / H.263 version 2"),
714 .type = AVMEDIA_TYPE_VIDEO,
715 .id = AV_CODEC_ID_H263,
716 .priv_data_size = sizeof(MpegEncContext),
717 .init = ff_h263_decode_init,
718 .close = ff_h263_decode_end,
719 .decode = ff_h263_decode_frame,
720 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
721 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
722 .flush = ff_mpeg_flush,
724 .pix_fmts = ff_h263_hwaccel_pixfmt_list_420,
727 AVCodec ff_h263p_decoder = {
729 .long_name = NULL_IF_CONFIG_SMALL("H.263 / H.263-1996, H.263+ / H.263-1998 / H.263 version 2"),
730 .type = AVMEDIA_TYPE_VIDEO,
731 .id = AV_CODEC_ID_H263P,
732 .priv_data_size = sizeof(MpegEncContext),
733 .init = ff_h263_decode_init,
734 .close = ff_h263_decode_end,
735 .decode = ff_h263_decode_frame,
736 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
737 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
738 .flush = ff_mpeg_flush,
740 .pix_fmts = ff_h263_hwaccel_pixfmt_list_420,