2
* "Real" compatible demuxer.
3
* Copyright (c) 2000, 2001 Fabrice Bellard.
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
25
static inline void get_strl(ByteIOContext *pb, char *buf, int buf_size, int len)
36
if (buf_size > 0) *q = '\0';
39
static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
41
get_strl(pb, buf, buf_size, get_be16(pb));
44
static void get_str8(ByteIOContext *pb, char *buf, int buf_size)
46
get_strl(pb, buf, buf_size, get_byte(pb));
49
static int rm_read_audio_stream_info(AVFormatContext *s, AVStream *st,
52
RMContext *rm = s->priv_data;
53
ByteIOContext *pb = s->pb;
59
version = get_be32(pb); /* version */
60
if (((version >> 16) & 0xff) == 3) {
61
int64_t startpos = url_ftell(pb);
62
/* very old version */
63
for(i = 0; i < 14; i++)
65
get_str8(pb, s->title, sizeof(s->title));
66
get_str8(pb, s->author, sizeof(s->author));
67
get_str8(pb, s->copyright, sizeof(s->copyright));
68
get_str8(pb, s->comment, sizeof(s->comment));
69
if ((startpos + (version & 0xffff)) >= url_ftell(pb) + 2) {
70
// fourcc (should always be "lpcJ")
72
get_str8(pb, buf, sizeof(buf));
74
// Skip extra header crap (this should never happen)
75
if ((startpos + (version & 0xffff)) > url_ftell(pb))
76
url_fskip(pb, (version & 0xffff) + startpos - url_ftell(pb));
77
st->codec->sample_rate = 8000;
78
st->codec->channels = 1;
79
st->codec->codec_type = CODEC_TYPE_AUDIO;
80
st->codec->codec_id = CODEC_ID_RA_144;
82
int flavor, sub_packet_h, coded_framesize, sub_packet_size;
84
get_be32(pb); /* .ra4 */
85
get_be32(pb); /* data size */
86
get_be16(pb); /* version2 */
87
get_be32(pb); /* header size */
88
flavor= get_be16(pb); /* add codec info / flavor */
89
rm->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */
90
get_be32(pb); /* ??? */
91
get_be32(pb); /* ??? */
92
get_be32(pb); /* ??? */
93
rm->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */
94
st->codec->block_align= get_be16(pb); /* frame size */
95
rm->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */
96
get_be16(pb); /* ??? */
97
if (((version >> 16) & 0xff) == 5) {
98
get_be16(pb); get_be16(pb); get_be16(pb); }
99
st->codec->sample_rate = get_be16(pb);
101
st->codec->channels = get_be16(pb);
102
if (((version >> 16) & 0xff) == 5) {
104
buf[0] = get_byte(pb);
105
buf[1] = get_byte(pb);
106
buf[2] = get_byte(pb);
107
buf[3] = get_byte(pb);
110
get_str8(pb, buf, sizeof(buf)); /* desc */
111
get_str8(pb, buf, sizeof(buf)); /* desc */
113
st->codec->codec_type = CODEC_TYPE_AUDIO;
114
if (!strcmp(buf, "dnet")) {
115
st->codec->codec_id = CODEC_ID_AC3;
116
st->need_parsing = AVSTREAM_PARSE_FULL;
117
} else if (!strcmp(buf, "28_8")) {
118
st->codec->codec_id = CODEC_ID_RA_288;
119
st->codec->extradata_size= 0;
120
rm->audio_framesize = st->codec->block_align;
121
st->codec->block_align = coded_framesize;
123
if(rm->audio_framesize >= UINT_MAX / sub_packet_h){
124
av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
128
rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h);
129
} else if ((!strcmp(buf, "cook")) || (!strcmp(buf, "atrc"))) {
130
int codecdata_length, i;
131
get_be16(pb); get_byte(pb);
132
if (((version >> 16) & 0xff) == 5)
134
codecdata_length = get_be32(pb);
135
if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
136
av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
140
if (!strcmp(buf, "cook")) st->codec->codec_id = CODEC_ID_COOK;
141
else st->codec->codec_id = CODEC_ID_ATRAC3;
142
st->codec->extradata_size= codecdata_length;
143
st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
144
for(i = 0; i < codecdata_length; i++)
145
((uint8_t*)st->codec->extradata)[i] = get_byte(pb);
146
rm->audio_framesize = st->codec->block_align;
147
st->codec->block_align = rm->sub_packet_size;
149
if(rm->audio_framesize >= UINT_MAX / sub_packet_h){
150
av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
154
rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h);
155
} else if (!strcmp(buf, "raac") || !strcmp(buf, "racp")) {
156
int codecdata_length, i;
157
get_be16(pb); get_byte(pb);
158
if (((version >> 16) & 0xff) == 5)
160
st->codec->codec_id = CODEC_ID_AAC;
161
codecdata_length = get_be32(pb);
162
if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
163
av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
166
if (codecdata_length >= 1) {
167
st->codec->extradata_size = codecdata_length - 1;
168
st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
170
for(i = 0; i < st->codec->extradata_size; i++)
171
((uint8_t*)st->codec->extradata)[i] = get_byte(pb);
174
st->codec->codec_id = CODEC_ID_NONE;
175
av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
182
get_str8(pb, s->title, sizeof(s->title));
183
get_str8(pb, s->author, sizeof(s->author));
184
get_str8(pb, s->copyright, sizeof(s->copyright));
185
get_str8(pb, s->comment, sizeof(s->comment));
192
ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVStream *st)
194
ByteIOContext *pb = s->pb;
196
int codec_data_size, size;
199
codec_data_size = get_be32(pb);
200
codec_pos = url_ftell(pb);
202
if (v == MKTAG(0xfd, 'a', 'r', '.')) {
204
if (rm_read_audio_stream_info(s, st, 0))
208
if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) {
210
av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
213
st->codec->codec_tag = get_le32(pb);
214
// av_log(NULL, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
215
if ( st->codec->codec_tag != MKTAG('R', 'V', '1', '0')
216
&& st->codec->codec_tag != MKTAG('R', 'V', '2', '0')
217
&& st->codec->codec_tag != MKTAG('R', 'V', '3', '0')
218
&& st->codec->codec_tag != MKTAG('R', 'V', '4', '0'))
220
st->codec->width = get_be16(pb);
221
st->codec->height = get_be16(pb);
222
st->codec->time_base.num= 1;
224
st->codec->codec_type = CODEC_TYPE_VIDEO;
229
st->codec->extradata_size= codec_data_size - (url_ftell(pb) - codec_pos);
231
if(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){
232
//check is redundant as get_buffer() will catch this
233
av_log(s, AV_LOG_ERROR, "st->codec->extradata_size too large\n");
236
st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
237
get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
239
// av_log(NULL, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2);
240
st->codec->time_base.den = fps * st->codec->time_base.num;
241
switch(((uint8_t*)st->codec->extradata)[4]>>4){
242
case 1: st->codec->codec_id = CODEC_ID_RV10; break;
243
case 2: st->codec->codec_id = CODEC_ID_RV20; break;
244
case 3: st->codec->codec_id = CODEC_ID_RV30; break;
245
case 4: st->codec->codec_id = CODEC_ID_RV40; break;
251
/* skip codec info */
252
size = url_ftell(pb) - codec_pos;
253
url_fskip(pb, codec_data_size - size);
259
static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap)
261
RMContext *rm = s->priv_data;
265
st = av_new_stream(s, 0);
268
return rm_read_audio_stream_info(s, st, 1);
271
static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
273
RMContext *rm = s->priv_data;
275
ByteIOContext *pb = s->pb;
278
unsigned int start_time, duration;
283
if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
284
/* very old .ra format */
285
return rm_read_header_old(s, ap);
286
} else if (tag != MKTAG('.', 'R', 'M', 'F')) {
290
get_be32(pb); /* header size */
293
get_be32(pb); /* number of headers */
299
tag_size = get_be32(pb);
302
printf("tag=%c%c%c%c (%08x) size=%d\n",
310
if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
313
case MKTAG('P', 'R', 'O', 'P'):
315
get_be32(pb); /* max bit rate */
316
get_be32(pb); /* avg bit rate */
317
get_be32(pb); /* max packet size */
318
get_be32(pb); /* avg packet size */
319
get_be32(pb); /* nb packets */
320
get_be32(pb); /* duration */
321
get_be32(pb); /* preroll */
322
get_be32(pb); /* index offset */
323
get_be32(pb); /* data offset */
324
get_be16(pb); /* nb streams */
325
flags = get_be16(pb); /* flags */
327
case MKTAG('C', 'O', 'N', 'T'):
328
get_str16(pb, s->title, sizeof(s->title));
329
get_str16(pb, s->author, sizeof(s->author));
330
get_str16(pb, s->copyright, sizeof(s->copyright));
331
get_str16(pb, s->comment, sizeof(s->comment));
333
case MKTAG('M', 'D', 'P', 'R'):
334
st = av_new_stream(s, 0);
337
st->id = get_be16(pb);
338
get_be32(pb); /* max bit rate */
339
st->codec->bit_rate = get_be32(pb); /* bit rate */
340
get_be32(pb); /* max packet size */
341
get_be32(pb); /* avg packet size */
342
start_time = get_be32(pb); /* start time */
343
get_be32(pb); /* preroll */
344
duration = get_be32(pb); /* duration */
345
st->start_time = start_time;
346
st->duration = duration;
347
get_str8(pb, buf, sizeof(buf)); /* desc */
348
get_str8(pb, buf, sizeof(buf)); /* mimetype */
349
st->codec->codec_type = CODEC_TYPE_DATA;
350
av_set_pts_info(st, 64, 1, 1000);
351
if (ff_rm_read_mdpr_codecdata(s, st) < 0)
354
case MKTAG('D', 'A', 'T', 'A'):
357
/* unknown tag: skip it */
358
url_fskip(pb, tag_size - 10);
363
rm->nb_packets = get_be32(pb); /* number of packets */
364
if (!rm->nb_packets && (flags & 4))
365
rm->nb_packets = 3600 * 25;
366
get_be32(pb); /* next data header */
371
for(i=0;i<s->nb_streams;i++) {
372
av_free(s->streams[i]);
377
static int get_num(ByteIOContext *pb, int *len)
389
return (n << 16) | n1;
393
/* multiple of 20 bytes for ra144 (ugly) */
394
#define RAW_PACKET_SIZE 1000
396
static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
397
RMContext *rm = s->priv_data;
398
ByteIOContext *pb = s->pb;
399
int len, num, res, i;
401
uint32_t state=0xFFFFFFFF;
403
while(!url_feof(pb)){
404
*pos= url_ftell(pb) - 3;
405
if(rm->remaining_len > 0){
406
num= rm->current_stream;
407
len= rm->remaining_len;
408
*timestamp = AV_NOPTS_VALUE;
411
state= (state<<8) + get_byte(pb);
413
if(state == MKBETAG('I', 'N', 'D', 'X')){
414
len = get_be16(pb) - 6;
420
if(state > (unsigned)0xFFFF || state < 12)
426
*timestamp = get_be32(pb);
427
res= get_byte(pb); /* reserved */
428
*flags = get_byte(pb); /* flags */
433
for(i=0;i<s->nb_streams;i++) {
438
if (i == s->nb_streams) {
440
/* skip packet if unknown number */
442
rm->remaining_len -= len;
452
static int rm_assemble_video_frame(AVFormatContext *s, RMContext *rm, AVPacket *pkt, int len)
454
ByteIOContext *pb = s->pb;
455
int hdr, seq, pic_num, len2, pos;
458
hdr = get_byte(pb); len--;
462
case 2: // last slice
463
seq = get_byte(pb); len--;
464
len2 = get_num(pb, &len);
465
pos = get_num(pb, &len);
466
pic_num = get_byte(pb); len--;
467
rm->remaining_len = len;
469
case 1: //whole frame
470
seq = get_byte(pb); len--;
471
if(av_new_packet(pkt, len + 9) < 0)
474
AV_WL32(pkt->data + 1, 1);
475
AV_WL32(pkt->data + 5, 0);
476
get_buffer(pb, pkt->data + 9, len);
477
rm->remaining_len = 0;
479
case 3: //frame as a part of packet
480
len2 = get_num(pb, &len);
481
pos = get_num(pb, &len);
482
pic_num = get_byte(pb); len--;
483
rm->remaining_len = len - len2;
484
if(av_new_packet(pkt, len2 + 9) < 0)
487
AV_WL32(pkt->data + 1, 1);
488
AV_WL32(pkt->data + 5, 0);
489
get_buffer(pb, pkt->data + 9, len2);
492
//now we have to deal with single slice
494
if((seq & 0x7F) == 1 || rm->curpic_num != pic_num){
495
rm->slices = ((hdr & 0x3F) << 1) + 1;
496
rm->videobufsize = len2 + 8*rm->slices + 1;
497
av_free(rm->videobuf);
498
if(!(rm->videobuf = av_malloc(rm->videobufsize)))
499
return AVERROR(ENOMEM);
500
rm->videobufpos = 8*rm->slices + 1;
502
rm->curpic_num = pic_num;
503
rm->pktpos = url_ftell(pb);
506
len = FFMIN(len, pos);
508
if(++rm->cur_slice > rm->slices)
510
AV_WL32(rm->videobuf - 7 + 8*rm->cur_slice, 1);
511
AV_WL32(rm->videobuf - 3 + 8*rm->cur_slice, rm->videobufpos - 8*rm->slices - 1);
512
if(rm->videobufpos + len > rm->videobufsize)
514
if (get_buffer(pb, rm->videobuf + rm->videobufpos, len) != len)
516
rm->videobufpos += len;
517
rm->remaining_len-= len;
519
if(type == 2 || (rm->videobufpos) == rm->videobufsize){
520
rm->videobuf[0] = rm->cur_slice-1;
521
if(av_new_packet(pkt, rm->videobufpos - 8*(rm->slices - rm->cur_slice)) < 0)
522
return AVERROR(ENOMEM);
523
memcpy(pkt->data, rm->videobuf, 1 + 8*rm->cur_slice);
524
memcpy(pkt->data + 1 + 8*rm->cur_slice, rm->videobuf + 1 + 8*rm->slices,
525
rm->videobufpos - 1 - 8*rm->slices);
526
pkt->pts = AV_NOPTS_VALUE;
527
pkt->pos = rm->pktpos;
535
rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
540
if (st->codec->codec_id == CODEC_ID_AC3) {
542
for (j=0;j<pkt->size;j+=2) {
543
FFSWAP(int, ptr[0], ptr[1]);
550
ff_rm_parse_packet (AVFormatContext *s, AVStream *st, int len, AVPacket *pkt,
551
int *seq, int *flags, int64_t *timestamp)
553
ByteIOContext *pb = s->pb;
554
RMContext *rm = s->priv_data;
556
if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
557
rm->current_stream= st->id;
558
if(rm_assemble_video_frame(s, rm, pkt, len) == 1)
559
return -1; //got partial frame
560
} else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
561
if ((st->codec->codec_id == CODEC_ID_RA_288) ||
562
(st->codec->codec_id == CODEC_ID_COOK) ||
563
(st->codec->codec_id == CODEC_ID_ATRAC3)) {
565
int sps = rm->sub_packet_size;
566
int cfs = rm->coded_framesize;
567
int h = rm->sub_packet_h;
568
int y = rm->sub_packet_cnt;
569
int w = rm->audio_framesize;
572
y = rm->sub_packet_cnt = 0;
574
rm->audiotimestamp = *timestamp;
576
switch(st->codec->codec_id) {
577
case CODEC_ID_RA_288:
578
for (x = 0; x < h/2; x++)
579
get_buffer(pb, rm->audiobuf+x*2*w+y*cfs, cfs);
581
case CODEC_ID_ATRAC3:
583
for (x = 0; x < w/sps; x++)
584
get_buffer(pb, rm->audiobuf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
588
if (++(rm->sub_packet_cnt) < h)
591
rm->sub_packet_cnt = 0;
592
rm->audio_stream_num = st->index;
593
rm->audio_pkt_cnt = h * w / st->codec->block_align - 1;
594
// Release first audio packet
595
av_new_packet(pkt, st->codec->block_align);
596
memcpy(pkt->data, rm->audiobuf, st->codec->block_align);
597
*timestamp = rm->audiotimestamp;
598
*flags = 2; // Mark first packet as keyframe
600
} else if (st->codec->codec_id == CODEC_ID_AAC) {
602
rm->audio_stream_num = st->index;
603
rm->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4;
604
if (rm->sub_packet_cnt) {
605
for (x = 0; x < rm->sub_packet_cnt; x++)
606
rm->sub_packet_lengths[x] = get_be16(pb);
607
// Release first audio packet
608
rm->audio_pkt_cnt = rm->sub_packet_cnt - 1;
609
av_get_packet(pb, pkt, rm->sub_packet_lengths[0]);
610
*flags = 2; // Mark first packet as keyframe
613
av_get_packet(pb, pkt, len);
614
rm_ac3_swap_bytes(st, pkt);
617
av_get_packet(pb, pkt, len);
619
if( (st->discard >= AVDISCARD_NONKEY && !(*flags&2))
620
|| st->discard >= AVDISCARD_ALL){
625
pkt->stream_index = st->index;
628
if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
629
if(st->codec->codec_id == CODEC_ID_RV20){
630
int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
631
av_log(NULL, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
633
seq |= (*timestamp&~0x3FFF);
634
if(seq - *timestamp > 0x2000) seq -= 0x4000;
635
if(seq - *timestamp < -0x2000) seq += 0x4000;
640
pkt->pts= *timestamp;
642
pkt->flags |= PKT_FLAG_KEY;
648
ff_rm_retrieve_cache (AVFormatContext *s, AVStream *st, AVPacket *pkt)
650
ByteIOContext *pb = s->pb;
651
RMContext *rm = s->priv_data;
653
assert (rm->audio_pkt_cnt > 0);
655
if (st->codec->codec_id == CODEC_ID_AAC)
656
av_get_packet(pb, pkt, rm->sub_packet_lengths[rm->sub_packet_cnt - rm->audio_pkt_cnt]);
658
av_new_packet(pkt, st->codec->block_align);
659
memcpy(pkt->data, rm->audiobuf + st->codec->block_align *
660
(rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
661
st->codec->block_align);
665
pkt->stream_index = st->index;
668
static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
670
RMContext *rm = s->priv_data;
671
ByteIOContext *pb = s->pb;
674
int64_t timestamp, pos;
677
if (rm->audio_pkt_cnt) {
678
// If there are queued audio packet return them first
679
st = s->streams[rm->audio_stream_num];
680
ff_rm_retrieve_cache(s, st, pkt);
681
} else if (rm->old_format) {
683
if (st->codec->codec_id == CODEC_ID_RA_288) {
686
for (y = 0; y < rm->sub_packet_h; y++)
687
for (x = 0; x < rm->sub_packet_h/2; x++)
688
if (get_buffer(pb, rm->audiobuf+x*2*rm->audio_framesize+y*rm->coded_framesize, rm->coded_framesize) <= 0)
690
rm->audio_stream_num = 0;
691
rm->audio_pkt_cnt = rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - 1;
692
// Release first audio packet
693
av_new_packet(pkt, st->codec->block_align);
694
memcpy(pkt->data, rm->audiobuf, st->codec->block_align);
695
pkt->flags |= PKT_FLAG_KEY; // Mark first packet as keyframe
696
pkt->stream_index = 0;
698
/* just read raw bytes */
699
len = RAW_PACKET_SIZE;
700
len= av_get_packet(pb, pkt, len);
701
pkt->stream_index = 0;
707
rm_ac3_swap_bytes(st, pkt);
711
len=sync(s, ×tamp, &flags, &i, &pos);
716
if (ff_rm_parse_packet (s, st, len, pkt, &seq, &flags, ×tamp) < 0)
719
if((flags&2) && (seq&0x7F) == 1)
720
av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
726
static int rm_read_close(AVFormatContext *s)
728
RMContext *rm = s->priv_data;
730
av_free(rm->audiobuf);
731
av_free(rm->videobuf);
735
static int rm_probe(AVProbeData *p)
737
/* check file header */
738
if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
739
p->buf[2] == 'M' && p->buf[3] == 'F' &&
740
p->buf[4] == 0 && p->buf[5] == 0) ||
741
(p->buf[0] == '.' && p->buf[1] == 'r' &&
742
p->buf[2] == 'a' && p->buf[3] == 0xfd))
743
return AVPROBE_SCORE_MAX;
748
static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
749
int64_t *ppos, int64_t pos_limit)
751
RMContext *rm = s->priv_data;
753
int stream_index2, flags, len, h;
758
return AV_NOPTS_VALUE;
760
url_fseek(s->pb, pos, SEEK_SET);
766
len=sync(s, &dts, &flags, &stream_index2, &pos);
768
return AV_NOPTS_VALUE;
770
st = s->streams[stream_index2];
771
if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
772
h= get_byte(s->pb); len--;
774
seq = get_byte(s->pb); len--;
778
if((flags&2) && (seq&0x7F) == 1){
779
// av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);
780
av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
781
if(stream_index2 == stream_index)
785
url_fskip(s->pb, len);
791
AVInputFormat rm_demuxer = {