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
22 #include "libavutil/avstring.h"
26 static inline void get_strl(ByteIOContext *pb, char *buf, int buf_size, int len)
37 if (buf_size > 0) *q = '\0';
40 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
42 get_strl(pb, buf, buf_size, get_be16(pb));
45 static void get_str8(ByteIOContext *pb, char *buf, int buf_size)
47 get_strl(pb, buf, buf_size, get_byte(pb));
50 static int rm_read_audio_stream_info(AVFormatContext *s, ByteIOContext *pb,
51 AVStream *st, int read_all)
53 RMContext *rm = s->priv_data;
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")) || (!strcmp(buf, "sipr"))) {
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(sub_packet_size <= 0){
141 av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
145 if (!strcmp(buf, "cook")) st->codec->codec_id = CODEC_ID_COOK;
146 else if (!strcmp(buf, "sipr")) st->codec->codec_id = CODEC_ID_SIPR;
147 else st->codec->codec_id = CODEC_ID_ATRAC3;
148 st->codec->extradata_size= codecdata_length;
149 st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
150 for(i = 0; i < codecdata_length; i++)
151 ((uint8_t*)st->codec->extradata)[i] = get_byte(pb);
152 rm->audio_framesize = st->codec->block_align;
153 st->codec->block_align = rm->sub_packet_size;
155 if(rm->audio_framesize >= UINT_MAX / sub_packet_h){
156 av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
160 rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h);
161 } else if (!strcmp(buf, "raac") || !strcmp(buf, "racp")) {
162 int codecdata_length, i;
163 get_be16(pb); get_byte(pb);
164 if (((version >> 16) & 0xff) == 5)
166 st->codec->codec_id = CODEC_ID_AAC;
167 codecdata_length = get_be32(pb);
168 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
169 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
172 if (codecdata_length >= 1) {
173 st->codec->extradata_size = codecdata_length - 1;
174 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
176 for(i = 0; i < st->codec->extradata_size; i++)
177 ((uint8_t*)st->codec->extradata)[i] = get_byte(pb);
180 st->codec->codec_id = CODEC_ID_NONE;
181 av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
188 get_str8(pb, s->title, sizeof(s->title));
189 get_str8(pb, s->author, sizeof(s->author));
190 get_str8(pb, s->copyright, sizeof(s->copyright));
191 get_str8(pb, s->comment, sizeof(s->comment));
198 ff_rm_read_mdpr_codecdata (AVFormatContext *s, ByteIOContext *pb,
199 AVStream *st, int codec_data_size)
205 av_set_pts_info(st, 64, 1, 1000);
206 codec_pos = url_ftell(pb);
208 if (v == MKTAG(0xfd, 'a', 'r', '.')) {
210 if (rm_read_audio_stream_info(s, pb, st, 0))
214 if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) {
216 av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
219 st->codec->codec_tag = get_le32(pb);
220 // av_log(NULL, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
221 if ( st->codec->codec_tag != MKTAG('R', 'V', '1', '0')
222 && st->codec->codec_tag != MKTAG('R', 'V', '2', '0')
223 && st->codec->codec_tag != MKTAG('R', 'V', '3', '0')
224 && st->codec->codec_tag != MKTAG('R', 'V', '4', '0')
225 && st->codec->codec_tag != MKTAG('R', 'V', 'T', 'R'))
227 st->codec->width = get_be16(pb);
228 st->codec->height = get_be16(pb);
229 st->codec->time_base.num= 1;
231 st->codec->codec_type = CODEC_TYPE_VIDEO;
236 st->codec->extradata_size= codec_data_size - (url_ftell(pb) - codec_pos);
238 if(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){
239 //check is redundant as get_buffer() will catch this
240 av_log(s, AV_LOG_ERROR, "st->codec->extradata_size too large\n");
243 st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
244 if (!st->codec->extradata)
245 return AVERROR(ENOMEM);
246 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
248 // av_log(NULL, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2);
249 st->codec->time_base.den = fps * st->codec->time_base.num;
250 switch(((uint8_t*)st->codec->extradata)[4]>>4){
251 case 1: st->codec->codec_id = CODEC_ID_RV10; break;
252 case 2: st->codec->codec_id = CODEC_ID_RV20; break;
253 case 3: st->codec->codec_id = CODEC_ID_RV30; break;
254 case 4: st->codec->codec_id = CODEC_ID_RV40; break;
260 /* skip codec info */
261 size = url_ftell(pb) - codec_pos;
262 url_fskip(pb, codec_data_size - size);
268 static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap)
270 RMContext *rm = s->priv_data;
274 st = av_new_stream(s, 0);
277 return rm_read_audio_stream_info(s, s->pb, st, 1);
280 static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
282 RMContext *rm = s->priv_data;
284 ByteIOContext *pb = s->pb;
287 unsigned int start_time, duration;
292 if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
293 /* very old .ra format */
294 return rm_read_header_old(s, ap);
295 } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
299 get_be32(pb); /* header size */
302 get_be32(pb); /* number of headers */
308 tag_size = get_be32(pb);
311 printf("tag=%c%c%c%c (%08x) size=%d\n",
319 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
322 case MKTAG('P', 'R', 'O', 'P'):
324 get_be32(pb); /* max bit rate */
325 get_be32(pb); /* avg bit rate */
326 get_be32(pb); /* max packet size */
327 get_be32(pb); /* avg packet size */
328 get_be32(pb); /* nb packets */
329 get_be32(pb); /* duration */
330 get_be32(pb); /* preroll */
331 get_be32(pb); /* index offset */
332 get_be32(pb); /* data offset */
333 get_be16(pb); /* nb streams */
334 flags = get_be16(pb); /* flags */
336 case MKTAG('C', 'O', 'N', 'T'):
337 get_str16(pb, s->title, sizeof(s->title));
338 get_str16(pb, s->author, sizeof(s->author));
339 get_str16(pb, s->copyright, sizeof(s->copyright));
340 get_str16(pb, s->comment, sizeof(s->comment));
342 case MKTAG('M', 'D', 'P', 'R'):
343 st = av_new_stream(s, 0);
345 return AVERROR(ENOMEM);
346 st->id = get_be16(pb);
347 get_be32(pb); /* max bit rate */
348 st->codec->bit_rate = get_be32(pb); /* bit rate */
349 get_be32(pb); /* max packet size */
350 get_be32(pb); /* avg packet size */
351 start_time = get_be32(pb); /* start time */
352 get_be32(pb); /* preroll */
353 duration = get_be32(pb); /* duration */
354 st->start_time = start_time;
355 st->duration = duration;
356 get_str8(pb, buf, sizeof(buf)); /* desc */
357 get_str8(pb, buf, sizeof(buf)); /* mimetype */
358 st->codec->codec_type = CODEC_TYPE_DATA;
359 if (ff_rm_read_mdpr_codecdata(s, s->pb, st, get_be32(pb)) < 0)
362 case MKTAG('D', 'A', 'T', 'A'):
365 /* unknown tag: skip it */
366 url_fskip(pb, tag_size - 10);
371 rm->nb_packets = get_be32(pb); /* number of packets */
372 if (!rm->nb_packets && (flags & 4))
373 rm->nb_packets = 3600 * 25;
374 get_be32(pb); /* next data header */
379 static int get_num(ByteIOContext *pb, int *len)
391 return (n << 16) | n1;
395 /* multiple of 20 bytes for ra144 (ugly) */
396 #define RAW_PACKET_SIZE 1000
398 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
399 RMContext *rm = s->priv_data;
400 ByteIOContext *pb = s->pb;
401 int len, num, res, i;
403 uint32_t state=0xFFFFFFFF;
405 while(!url_feof(pb)){
406 *pos= url_ftell(pb) - 3;
407 if(rm->remaining_len > 0){
408 num= rm->current_stream;
409 len= rm->remaining_len;
410 *timestamp = AV_NOPTS_VALUE;
413 state= (state<<8) + get_byte(pb);
415 if(state == MKBETAG('I', 'N', 'D', 'X')){
416 len = get_be16(pb) - 6;
422 if(state > (unsigned)0xFFFF || state < 12)
428 *timestamp = get_be32(pb);
429 res= get_byte(pb); /* reserved */
430 *flags = get_byte(pb); /* flags */
435 for(i=0;i<s->nb_streams;i++) {
440 if (i == s->nb_streams) {
442 /* skip packet if unknown number */
444 rm->remaining_len -= len;
454 static int rm_assemble_video_frame(AVFormatContext *s, ByteIOContext *pb,
455 RMContext *rm, AVPacket *pkt, int len)
457 int hdr, seq, pic_num, len2, pos;
460 hdr = get_byte(pb); len--;
464 case 2: // last slice
465 seq = get_byte(pb); len--;
466 len2 = get_num(pb, &len);
467 pos = get_num(pb, &len);
468 pic_num = get_byte(pb); len--;
469 rm->remaining_len = len;
471 case 1: //whole frame
472 seq = get_byte(pb); len--;
473 if(av_new_packet(pkt, len + 9) < 0)
476 AV_WL32(pkt->data + 1, 1);
477 AV_WL32(pkt->data + 5, 0);
478 get_buffer(pb, pkt->data + 9, len);
479 rm->remaining_len = 0;
481 case 3: //frame as a part of packet
482 len2 = get_num(pb, &len);
483 pos = get_num(pb, &len);
484 pic_num = get_byte(pb); len--;
485 rm->remaining_len = len - len2;
486 if(av_new_packet(pkt, len2 + 9) < 0)
489 AV_WL32(pkt->data + 1, 1);
490 AV_WL32(pkt->data + 5, 0);
491 get_buffer(pb, pkt->data + 9, len2);
494 //now we have to deal with single slice
496 if((seq & 0x7F) == 1 || rm->curpic_num != pic_num){
497 rm->slices = ((hdr & 0x3F) << 1) + 1;
498 rm->videobufsize = len2 + 8*rm->slices + 1;
499 av_free(rm->videobuf);
500 if(!(rm->videobuf = av_malloc(rm->videobufsize)))
501 return AVERROR(ENOMEM);
502 rm->videobufpos = 8*rm->slices + 1;
504 rm->curpic_num = pic_num;
505 rm->pktpos = url_ftell(pb);
508 len = FFMIN(len, pos);
510 if(++rm->cur_slice > rm->slices)
512 AV_WL32(rm->videobuf - 7 + 8*rm->cur_slice, 1);
513 AV_WL32(rm->videobuf - 3 + 8*rm->cur_slice, rm->videobufpos - 8*rm->slices - 1);
514 if(rm->videobufpos + len > rm->videobufsize)
516 if (get_buffer(pb, rm->videobuf + rm->videobufpos, len) != len)
518 rm->videobufpos += len;
519 rm->remaining_len-= len;
521 if(type == 2 || (rm->videobufpos) == rm->videobufsize){
522 rm->videobuf[0] = rm->cur_slice-1;
523 if(av_new_packet(pkt, rm->videobufpos - 8*(rm->slices - rm->cur_slice)) < 0)
524 return AVERROR(ENOMEM);
525 memcpy(pkt->data, rm->videobuf, 1 + 8*rm->cur_slice);
526 memcpy(pkt->data + 1 + 8*rm->cur_slice, rm->videobuf + 1 + 8*rm->slices,
527 rm->videobufpos - 1 - 8*rm->slices);
528 pkt->pts = AV_NOPTS_VALUE;
529 pkt->pos = rm->pktpos;
537 rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
542 if (st->codec->codec_id == CODEC_ID_AC3) {
544 for (j=0;j<pkt->size;j+=2) {
545 FFSWAP(int, ptr[0], ptr[1]);
552 ff_rm_parse_packet (AVFormatContext *s, ByteIOContext *pb,
553 AVStream *st, int len, AVPacket *pkt,
554 int *seq, int *flags, int64_t *timestamp)
556 RMContext *rm = s->priv_data;
558 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
559 rm->current_stream= st->id;
560 if(rm_assemble_video_frame(s, pb, rm, pkt, len) == 1)
561 return -1; //got partial frame
562 } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
563 if ((st->codec->codec_id == CODEC_ID_RA_288) ||
564 (st->codec->codec_id == CODEC_ID_COOK) ||
565 (st->codec->codec_id == CODEC_ID_ATRAC3) ||
566 (st->codec->codec_id == CODEC_ID_SIPR)) {
568 int sps = rm->sub_packet_size;
569 int cfs = rm->coded_framesize;
570 int h = rm->sub_packet_h;
571 int y = rm->sub_packet_cnt;
572 int w = rm->audio_framesize;
575 y = rm->sub_packet_cnt = 0;
577 rm->audiotimestamp = *timestamp;
579 switch(st->codec->codec_id) {
580 case CODEC_ID_RA_288:
581 for (x = 0; x < h/2; x++)
582 get_buffer(pb, rm->audiobuf+x*2*w+y*cfs, cfs);
584 case CODEC_ID_ATRAC3:
586 for (x = 0; x < w/sps; x++)
587 get_buffer(pb, rm->audiobuf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
591 if (++(rm->sub_packet_cnt) < h)
594 rm->sub_packet_cnt = 0;
595 rm->audio_stream_num = st->index;
596 rm->audio_pkt_cnt = h * w / st->codec->block_align - 1;
597 // Release first audio packet
598 av_new_packet(pkt, st->codec->block_align);
599 memcpy(pkt->data, rm->audiobuf, st->codec->block_align);
600 *timestamp = rm->audiotimestamp;
601 *flags = 2; // Mark first packet as keyframe
603 } else if (st->codec->codec_id == CODEC_ID_AAC) {
605 rm->audio_stream_num = st->index;
606 rm->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4;
607 if (rm->sub_packet_cnt) {
608 for (x = 0; x < rm->sub_packet_cnt; x++)
609 rm->sub_packet_lengths[x] = get_be16(pb);
610 // Release first audio packet
611 rm->audio_pkt_cnt = rm->sub_packet_cnt - 1;
612 av_get_packet(pb, pkt, rm->sub_packet_lengths[0]);
613 *flags = 2; // Mark first packet as keyframe
616 av_get_packet(pb, pkt, len);
617 rm_ac3_swap_bytes(st, pkt);
620 av_get_packet(pb, pkt, len);
622 if( (st->discard >= AVDISCARD_NONKEY && !(*flags&2))
623 || st->discard >= AVDISCARD_ALL){
628 pkt->stream_index = st->index;
631 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
632 if(st->codec->codec_id == CODEC_ID_RV20){
633 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
634 av_log(NULL, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
636 seq |= (*timestamp&~0x3FFF);
637 if(seq - *timestamp > 0x2000) seq -= 0x4000;
638 if(seq - *timestamp < -0x2000) seq += 0x4000;
643 pkt->pts= *timestamp;
645 pkt->flags |= PKT_FLAG_KEY;
651 ff_rm_retrieve_cache (AVFormatContext *s, ByteIOContext *pb,
652 AVStream *st, AVPacket *pkt)
654 RMContext *rm = s->priv_data;
656 assert (rm->audio_pkt_cnt > 0);
658 if (st->codec->codec_id == CODEC_ID_AAC)
659 av_get_packet(pb, pkt, rm->sub_packet_lengths[rm->sub_packet_cnt - rm->audio_pkt_cnt]);
661 av_new_packet(pkt, st->codec->block_align);
662 memcpy(pkt->data, rm->audiobuf + st->codec->block_align *
663 (rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
664 st->codec->block_align);
668 pkt->stream_index = st->index;
671 static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
673 RMContext *rm = s->priv_data;
674 ByteIOContext *pb = s->pb;
677 int64_t timestamp, pos;
680 if (rm->audio_pkt_cnt) {
681 // If there are queued audio packet return them first
682 st = s->streams[rm->audio_stream_num];
683 ff_rm_retrieve_cache(s, s->pb, st, pkt);
684 } else if (rm->old_format) {
686 if (st->codec->codec_id == CODEC_ID_RA_288) {
689 for (y = 0; y < rm->sub_packet_h; y++)
690 for (x = 0; x < rm->sub_packet_h/2; x++)
691 if (get_buffer(pb, rm->audiobuf+x*2*rm->audio_framesize+y*rm->coded_framesize, rm->coded_framesize) <= 0)
693 rm->audio_stream_num = 0;
694 rm->audio_pkt_cnt = rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - 1;
695 // Release first audio packet
696 av_new_packet(pkt, st->codec->block_align);
697 memcpy(pkt->data, rm->audiobuf, st->codec->block_align);
698 pkt->flags |= PKT_FLAG_KEY; // Mark first packet as keyframe
699 pkt->stream_index = 0;
701 /* just read raw bytes */
702 len = RAW_PACKET_SIZE;
703 len= av_get_packet(pb, pkt, len);
704 pkt->stream_index = 0;
710 rm_ac3_swap_bytes(st, pkt);
714 len=sync(s, ×tamp, &flags, &i, &pos);
719 if (ff_rm_parse_packet (s, s->pb, st, len, pkt, &seq, &flags, ×tamp) < 0)
722 if((flags&2) && (seq&0x7F) == 1)
723 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
729 static int rm_read_close(AVFormatContext *s)
731 RMContext *rm = s->priv_data;
733 av_free(rm->audiobuf);
734 av_free(rm->videobuf);
738 static int rm_probe(AVProbeData *p)
740 /* check file header */
741 if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
742 p->buf[2] == 'M' && p->buf[3] == 'F' &&
743 p->buf[4] == 0 && p->buf[5] == 0) ||
744 (p->buf[0] == '.' && p->buf[1] == 'r' &&
745 p->buf[2] == 'a' && p->buf[3] == 0xfd))
746 return AVPROBE_SCORE_MAX;
751 static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
752 int64_t *ppos, int64_t pos_limit)
754 RMContext *rm = s->priv_data;
756 int stream_index2, flags, len, h;
761 return AV_NOPTS_VALUE;
763 url_fseek(s->pb, pos, SEEK_SET);
769 len=sync(s, &dts, &flags, &stream_index2, &pos);
771 return AV_NOPTS_VALUE;
773 st = s->streams[stream_index2];
774 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
775 h= get_byte(s->pb); len--;
777 seq = get_byte(s->pb); len--;
781 if((flags&2) && (seq&0x7F) == 1){
782 // av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);
783 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
784 if(stream_index2 == stream_index)
788 url_fskip(s->pb, len);
794 AVInputFormat rm_demuxer = {
796 NULL_IF_CONFIG_SMALL("RM format"),
806 AVInputFormat rdt_demuxer = {
808 NULL_IF_CONFIG_SMALL("RDT demuxer"),
810 NULL, NULL, NULL, rm_read_close, NULL, NULL