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"
27 AVPacket pkt; ///< place to store merged video frame / reordered audio data
28 int videobufsize; ///< current assembled frame size
29 int videobufpos; ///< position for the next slice in the video buffer
30 int curpic_num; ///< picture number of current frame
31 int cur_slice, slices;
32 int64_t pktpos; ///< first slice position in file
33 /// Audio descrambling matrix parameters
34 int64_t audiotimestamp; ///< Audio packet timestamp
35 int sub_packet_cnt; // Subpacket counter, used while reading
36 int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container
37 int audio_framesize; /// Audio frame size from container
38 int sub_packet_lengths[16]; /// Length of each subpacket
46 int audio_stream_num; ///< Stream number for audio packets
47 int audio_pkt_cnt; ///< Output packet counter
50 static inline void get_strl(ByteIOContext *pb, char *buf, int buf_size, int len)
61 if (buf_size > 0) *q = '\0';
64 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
66 get_strl(pb, buf, buf_size, get_be16(pb));
69 static void get_str8(ByteIOContext *pb, char *buf, int buf_size)
71 get_strl(pb, buf, buf_size, get_byte(pb));
74 RMStream *ff_rm_alloc_rmstream (void)
76 RMStream *rms = av_mallocz(sizeof(RMStream));
81 void ff_rm_free_rmstream (RMStream *rms)
83 av_free_packet(&rms->pkt);
86 static int rm_read_audio_stream_info(AVFormatContext *s, ByteIOContext *pb,
87 AVStream *st, RMStream *ast, int read_all)
93 version = get_be32(pb); /* version */
94 if (((version >> 16) & 0xff) == 3) {
95 int64_t startpos = url_ftell(pb);
97 get_str8(pb, s->title, sizeof(s->title));
98 get_str8(pb, s->author, sizeof(s->author));
99 get_str8(pb, s->copyright, sizeof(s->copyright));
100 get_str8(pb, s->comment, sizeof(s->comment));
101 if ((startpos + (version & 0xffff)) >= url_ftell(pb) + 2) {
102 // fourcc (should always be "lpcJ")
104 get_str8(pb, buf, sizeof(buf));
106 // Skip extra header crap (this should never happen)
107 if ((startpos + (version & 0xffff)) > url_ftell(pb))
108 url_fskip(pb, (version & 0xffff) + startpos - url_ftell(pb));
109 st->codec->sample_rate = 8000;
110 st->codec->channels = 1;
111 st->codec->codec_type = CODEC_TYPE_AUDIO;
112 st->codec->codec_id = CODEC_ID_RA_144;
114 int flavor, sub_packet_h, coded_framesize, sub_packet_size;
115 /* old version (4) */
116 get_be32(pb); /* .ra4 */
117 get_be32(pb); /* data size */
118 get_be16(pb); /* version2 */
119 get_be32(pb); /* header size */
120 flavor= get_be16(pb); /* add codec info / flavor */
121 ast->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */
122 get_be32(pb); /* ??? */
123 get_be32(pb); /* ??? */
124 get_be32(pb); /* ??? */
125 ast->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */
126 st->codec->block_align= get_be16(pb); /* frame size */
127 ast->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */
128 get_be16(pb); /* ??? */
129 if (((version >> 16) & 0xff) == 5) {
130 get_be16(pb); get_be16(pb); get_be16(pb);
132 st->codec->sample_rate = get_be16(pb);
134 st->codec->channels = get_be16(pb);
135 if (((version >> 16) & 0xff) == 5) {
137 get_buffer(pb, buf, 4);
140 get_str8(pb, buf, sizeof(buf)); /* desc */
141 get_str8(pb, buf, sizeof(buf)); /* desc */
143 st->codec->codec_type = CODEC_TYPE_AUDIO;
144 if (!strcmp(buf, "dnet")) {
145 st->codec->codec_id = CODEC_ID_AC3;
146 st->need_parsing = AVSTREAM_PARSE_FULL;
147 } else if (!strcmp(buf, "28_8")) {
148 st->codec->codec_id = CODEC_ID_RA_288;
149 st->codec->extradata_size= 0;
150 ast->audio_framesize = st->codec->block_align;
151 st->codec->block_align = coded_framesize;
153 if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
154 av_log(s, AV_LOG_ERROR, "ast->audio_framesize * sub_packet_h too large\n");
158 av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h);
159 } else if ((!strcmp(buf, "cook")) || (!strcmp(buf, "atrc")) || (!strcmp(buf, "sipr"))) {
160 int codecdata_length;
161 get_be16(pb); get_byte(pb);
162 if (((version >> 16) & 0xff) == 5)
164 codecdata_length = get_be32(pb);
165 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
166 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
170 if(sub_packet_size <= 0){
171 av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
175 if (!strcmp(buf, "cook")) st->codec->codec_id = CODEC_ID_COOK;
176 else if (!strcmp(buf, "sipr")) st->codec->codec_id = CODEC_ID_SIPR;
177 else st->codec->codec_id = CODEC_ID_ATRAC3;
178 st->codec->extradata_size= codecdata_length;
179 st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
180 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
181 ast->audio_framesize = st->codec->block_align;
182 st->codec->block_align = ast->sub_packet_size;
184 if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
185 av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
189 av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h);
190 } else if (!strcmp(buf, "raac") || !strcmp(buf, "racp")) {
191 int codecdata_length;
192 get_be16(pb); get_byte(pb);
193 if (((version >> 16) & 0xff) == 5)
195 st->codec->codec_id = CODEC_ID_AAC;
196 codecdata_length = get_be32(pb);
197 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
198 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
201 if (codecdata_length >= 1) {
202 st->codec->extradata_size = codecdata_length - 1;
203 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
205 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
208 st->codec->codec_id = CODEC_ID_NONE;
209 av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
216 get_str8(pb, s->title, sizeof(s->title));
217 get_str8(pb, s->author, sizeof(s->author));
218 get_str8(pb, s->copyright, sizeof(s->copyright));
219 get_str8(pb, s->comment, sizeof(s->comment));
226 ff_rm_read_mdpr_codecdata (AVFormatContext *s, ByteIOContext *pb,
227 AVStream *st, RMStream *rst, int codec_data_size)
233 av_set_pts_info(st, 64, 1, 1000);
234 codec_pos = url_ftell(pb);
236 if (v == MKTAG(0xfd, 'a', 'r', '.')) {
238 if (rm_read_audio_stream_info(s, pb, st, rst, 0))
242 if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) {
244 av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
247 st->codec->codec_tag = get_le32(pb);
248 // av_log(NULL, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
249 if ( st->codec->codec_tag != MKTAG('R', 'V', '1', '0')
250 && st->codec->codec_tag != MKTAG('R', 'V', '2', '0')
251 && st->codec->codec_tag != MKTAG('R', 'V', '3', '0')
252 && st->codec->codec_tag != MKTAG('R', 'V', '4', '0')
253 && st->codec->codec_tag != MKTAG('R', 'V', 'T', 'R'))
255 st->codec->width = get_be16(pb);
256 st->codec->height = get_be16(pb);
257 st->codec->time_base.num= 1;
259 st->codec->codec_type = CODEC_TYPE_VIDEO;
264 st->codec->extradata_size= codec_data_size - (url_ftell(pb) - codec_pos);
266 if(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){
267 //check is redundant as get_buffer() will catch this
268 av_log(s, AV_LOG_ERROR, "st->codec->extradata_size too large\n");
271 st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
272 if (!st->codec->extradata)
273 return AVERROR(ENOMEM);
274 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
276 // av_log(NULL, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2);
277 st->codec->time_base.den = fps * st->codec->time_base.num;
278 switch(((uint8_t*)st->codec->extradata)[4]>>4){
279 case 1: st->codec->codec_id = CODEC_ID_RV10; break;
280 case 2: st->codec->codec_id = CODEC_ID_RV20; break;
281 case 3: st->codec->codec_id = CODEC_ID_RV30; break;
282 case 4: st->codec->codec_id = CODEC_ID_RV40; break;
288 /* skip codec info */
289 size = url_ftell(pb) - codec_pos;
290 url_fskip(pb, codec_data_size - size);
296 static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap)
298 RMDemuxContext *rm = s->priv_data;
302 st = av_new_stream(s, 0);
305 st->priv_data = ff_rm_alloc_rmstream();
306 return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
309 static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
311 RMDemuxContext *rm = s->priv_data;
313 ByteIOContext *pb = s->pb;
316 unsigned int start_time, duration;
321 if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
322 /* very old .ra format */
323 return rm_read_header_old(s, ap);
324 } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
328 get_be32(pb); /* header size */
331 get_be32(pb); /* number of headers */
337 tag_size = get_be32(pb);
340 printf("tag=%c%c%c%c (%08x) size=%d\n",
348 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
351 case MKTAG('P', 'R', 'O', 'P'):
353 get_be32(pb); /* max bit rate */
354 get_be32(pb); /* avg bit rate */
355 get_be32(pb); /* max packet size */
356 get_be32(pb); /* avg packet size */
357 get_be32(pb); /* nb packets */
358 get_be32(pb); /* duration */
359 get_be32(pb); /* preroll */
360 get_be32(pb); /* index offset */
361 get_be32(pb); /* data offset */
362 get_be16(pb); /* nb streams */
363 flags = get_be16(pb); /* flags */
365 case MKTAG('C', 'O', 'N', 'T'):
366 get_str16(pb, s->title, sizeof(s->title));
367 get_str16(pb, s->author, sizeof(s->author));
368 get_str16(pb, s->copyright, sizeof(s->copyright));
369 get_str16(pb, s->comment, sizeof(s->comment));
371 case MKTAG('M', 'D', 'P', 'R'):
372 st = av_new_stream(s, 0);
374 return AVERROR(ENOMEM);
375 st->id = get_be16(pb);
376 get_be32(pb); /* max bit rate */
377 st->codec->bit_rate = get_be32(pb); /* bit rate */
378 get_be32(pb); /* max packet size */
379 get_be32(pb); /* avg packet size */
380 start_time = get_be32(pb); /* start time */
381 get_be32(pb); /* preroll */
382 duration = get_be32(pb); /* duration */
383 st->start_time = start_time;
384 st->duration = duration;
385 get_str8(pb, buf, sizeof(buf)); /* desc */
386 get_str8(pb, buf, sizeof(buf)); /* mimetype */
387 st->codec->codec_type = CODEC_TYPE_DATA;
388 st->priv_data = ff_rm_alloc_rmstream();
389 if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
393 case MKTAG('D', 'A', 'T', 'A'):
396 /* unknown tag: skip it */
397 url_fskip(pb, tag_size - 10);
402 rm->nb_packets = get_be32(pb); /* number of packets */
403 if (!rm->nb_packets && (flags & 4))
404 rm->nb_packets = 3600 * 25;
405 get_be32(pb); /* next data header */
409 static int get_num(ByteIOContext *pb, int *len)
421 return (n << 16) | n1;
425 /* multiple of 20 bytes for ra144 (ugly) */
426 #define RAW_PACKET_SIZE 1000
428 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
429 RMDemuxContext *rm = s->priv_data;
430 ByteIOContext *pb = s->pb;
431 int len, num, res, i;
433 uint32_t state=0xFFFFFFFF;
435 while(!url_feof(pb)){
436 *pos= url_ftell(pb) - 3;
437 if(rm->remaining_len > 0){
438 num= rm->current_stream;
439 len= rm->remaining_len;
440 *timestamp = AV_NOPTS_VALUE;
443 state= (state<<8) + get_byte(pb);
445 if(state == MKBETAG('I', 'N', 'D', 'X')){
446 len = get_be16(pb) - 6;
452 if(state > (unsigned)0xFFFF || state < 12)
458 *timestamp = get_be32(pb);
459 res= get_byte(pb); /* reserved */
460 *flags = get_byte(pb); /* flags */
465 for(i=0;i<s->nb_streams;i++) {
470 if (i == s->nb_streams) {
472 /* skip packet if unknown number */
474 rm->remaining_len -= len;
484 static int rm_assemble_video_frame(AVFormatContext *s, ByteIOContext *pb,
485 RMDemuxContext *rm, RMStream *vst,
486 AVPacket *pkt, int len)
488 int hdr, seq, pic_num, len2, pos;
491 hdr = get_byte(pb); len--;
494 if(type != 3){ // not frame as a part of packet
495 seq = get_byte(pb); len--;
497 if(type != 1){ // not whole frame
498 len2 = get_num(pb, &len);
499 pos = get_num(pb, &len);
500 pic_num = get_byte(pb); len--;
504 rm->remaining_len = len;
505 if(type&1){ // frame, not slice
506 if(type == 3) // frame as a part of packet
508 if(rm->remaining_len < len)
510 rm->remaining_len -= len;
511 if(av_new_packet(pkt, len + 9) < 0)
514 AV_WL32(pkt->data + 1, 1);
515 AV_WL32(pkt->data + 5, 0);
516 get_buffer(pb, pkt->data + 9, len);
519 //now we have to deal with single slice
521 if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
522 vst->slices = ((hdr & 0x3F) << 1) + 1;
523 vst->videobufsize = len2 + 8*vst->slices + 1;
524 av_free_packet(&vst->pkt); //FIXME this should be output.
525 if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
526 return AVERROR(ENOMEM);
527 vst->videobufpos = 8*vst->slices + 1;
529 vst->curpic_num = pic_num;
530 vst->pktpos = url_ftell(pb);
533 len = FFMIN(len, pos);
535 if(++vst->cur_slice > vst->slices)
537 AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
538 AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
539 if(vst->videobufpos + len > vst->videobufsize)
541 if (get_buffer(pb, vst->pkt.data + vst->videobufpos, len) != len)
543 vst->videobufpos += len;
544 rm->remaining_len-= len;
546 if(type == 2 || (vst->videobufpos) == vst->videobufsize){
547 vst->pkt.data[0] = vst->cur_slice-1;
551 if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
552 memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
553 vst->videobufpos - 1 - 8*vst->slices);
554 pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);
555 pkt->pts = AV_NOPTS_VALUE;
556 pkt->pos = vst->pktpos;
564 rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
569 if (st->codec->codec_id == CODEC_ID_AC3) {
571 for (j=0;j<pkt->size;j+=2) {
572 FFSWAP(int, ptr[0], ptr[1]);
579 ff_rm_parse_packet (AVFormatContext *s, ByteIOContext *pb,
580 AVStream *st, RMStream *ast, int len, AVPacket *pkt,
581 int *seq, int *flags, int64_t *timestamp)
583 RMDemuxContext *rm = s->priv_data;
585 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
586 rm->current_stream= st->id;
587 if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len))
588 return -1; //got partial frame
589 } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
590 if ((st->codec->codec_id == CODEC_ID_RA_288) ||
591 (st->codec->codec_id == CODEC_ID_COOK) ||
592 (st->codec->codec_id == CODEC_ID_ATRAC3) ||
593 (st->codec->codec_id == CODEC_ID_SIPR)) {
595 int sps = ast->sub_packet_size;
596 int cfs = ast->coded_framesize;
597 int h = ast->sub_packet_h;
598 int y = ast->sub_packet_cnt;
599 int w = ast->audio_framesize;
602 y = ast->sub_packet_cnt = 0;
604 ast->audiotimestamp = *timestamp;
606 switch(st->codec->codec_id) {
607 case CODEC_ID_RA_288:
608 for (x = 0; x < h/2; x++)
609 get_buffer(pb, ast->pkt.data+x*2*w+y*cfs, cfs);
611 case CODEC_ID_ATRAC3:
613 for (x = 0; x < w/sps; x++)
614 get_buffer(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
618 if (++(ast->sub_packet_cnt) < h)
621 ast->sub_packet_cnt = 0;
622 rm->audio_stream_num = st->index;
623 rm->audio_pkt_cnt = h * w / st->codec->block_align - 1;
624 // Release first audio packet
625 av_new_packet(pkt, st->codec->block_align);
626 memcpy(pkt->data, ast->pkt.data, st->codec->block_align); //FIXME avoid this
627 *timestamp = ast->audiotimestamp;
628 *flags = 2; // Mark first packet as keyframe
630 } else if (st->codec->codec_id == CODEC_ID_AAC) {
632 rm->audio_stream_num = st->index;
633 ast->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4;
634 if (ast->sub_packet_cnt) {
635 for (x = 0; x < ast->sub_packet_cnt; x++)
636 ast->sub_packet_lengths[x] = get_be16(pb);
637 // Release first audio packet
638 rm->audio_pkt_cnt = ast->sub_packet_cnt - 1;
639 av_get_packet(pb, pkt, ast->sub_packet_lengths[0]);
640 *flags = 2; // Mark first packet as keyframe
643 av_get_packet(pb, pkt, len);
644 rm_ac3_swap_bytes(st, pkt);
647 av_get_packet(pb, pkt, len);
649 if( (st->discard >= AVDISCARD_NONKEY && !(*flags&2))
650 || st->discard >= AVDISCARD_ALL){
655 pkt->stream_index = st->index;
658 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
659 if(st->codec->codec_id == CODEC_ID_RV20){
660 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
661 av_log(NULL, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
663 seq |= (*timestamp&~0x3FFF);
664 if(seq - *timestamp > 0x2000) seq -= 0x4000;
665 if(seq - *timestamp < -0x2000) seq += 0x4000;
670 pkt->pts= *timestamp;
672 pkt->flags |= PKT_FLAG_KEY;
674 return st->codec->codec_type == CODEC_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
678 ff_rm_retrieve_cache (AVFormatContext *s, ByteIOContext *pb,
679 AVStream *st, RMStream *ast, AVPacket *pkt)
681 RMDemuxContext *rm = s->priv_data;
683 assert (rm->audio_pkt_cnt > 0);
685 if (st->codec->codec_id == CODEC_ID_AAC)
686 av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
688 av_new_packet(pkt, st->codec->block_align);
689 memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this
690 (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
691 st->codec->block_align);
695 pkt->stream_index = st->index;
697 return rm->audio_pkt_cnt;
700 static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
702 RMDemuxContext *rm = s->priv_data;
703 ByteIOContext *pb = s->pb;
706 int64_t timestamp, pos;
709 if (rm->audio_pkt_cnt) {
710 // If there are queued audio packet return them first
711 st = s->streams[rm->audio_stream_num];
712 ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
713 } else if (rm->old_format) {
718 if (st->codec->codec_id == CODEC_ID_RA_288) {
721 for (y = 0; y < ast->sub_packet_h; y++)
722 for (x = 0; x < ast->sub_packet_h/2; x++)
723 if (get_buffer(pb, ast->pkt.data+x*2*ast->audio_framesize+y*ast->coded_framesize, ast->coded_framesize) <= 0)
725 rm->audio_stream_num = 0;
726 rm->audio_pkt_cnt = ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - 1;
727 // Release first audio packet
728 av_new_packet(pkt, st->codec->block_align);
729 memcpy(pkt->data, ast->pkt.data, st->codec->block_align); //FIXME avoid this
730 pkt->flags |= PKT_FLAG_KEY; // Mark first packet as keyframe
731 pkt->stream_index = 0;
733 /* just read raw bytes */
734 len = RAW_PACKET_SIZE;
735 len= av_get_packet(pb, pkt, len);
736 pkt->stream_index = 0;
742 rm_ac3_swap_bytes(st, pkt);
746 len=sync(s, ×tamp, &flags, &i, &pos);
751 if (ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
752 &seq, &flags, ×tamp) < 0)
755 if((flags&2) && (seq&0x7F) == 1)
756 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
762 static int rm_read_close(AVFormatContext *s)
766 for (i=0;i<s->nb_streams;i++)
767 ff_rm_free_rmstream(s->streams[i]->priv_data);
772 static int rm_probe(AVProbeData *p)
774 /* check file header */
775 if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
776 p->buf[2] == 'M' && p->buf[3] == 'F' &&
777 p->buf[4] == 0 && p->buf[5] == 0) ||
778 (p->buf[0] == '.' && p->buf[1] == 'r' &&
779 p->buf[2] == 'a' && p->buf[3] == 0xfd))
780 return AVPROBE_SCORE_MAX;
785 static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
786 int64_t *ppos, int64_t pos_limit)
788 RMDemuxContext *rm = s->priv_data;
790 int stream_index2, flags, len, h;
795 return AV_NOPTS_VALUE;
797 url_fseek(s->pb, pos, SEEK_SET);
803 len=sync(s, &dts, &flags, &stream_index2, &pos);
805 return AV_NOPTS_VALUE;
807 st = s->streams[stream_index2];
808 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
809 h= get_byte(s->pb); len--;
811 seq = get_byte(s->pb); len--;
815 if((flags&2) && (seq&0x7F) == 1){
816 // av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);
817 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
818 if(stream_index2 == stream_index)
822 url_fskip(s->pb, len);
828 AVInputFormat rm_demuxer = {
830 NULL_IF_CONFIG_SMALL("RM format"),
831 sizeof(RMDemuxContext),
840 AVInputFormat rdt_demuxer = {
842 NULL_IF_CONFIG_SMALL("RDT demuxer"),
843 sizeof(RMDemuxContext),
844 NULL, NULL, NULL, rm_read_close, NULL, NULL