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"
23 #include "libavutil/intreadwrite.h"
28 AVPacket pkt; ///< place to store merged video frame / reordered audio data
29 int videobufsize; ///< current assembled frame size
30 int videobufpos; ///< position for the next slice in the video buffer
31 int curpic_num; ///< picture number of current frame
32 int cur_slice, slices;
33 int64_t pktpos; ///< first slice position in file
34 /// Audio descrambling matrix parameters
35 int64_t audiotimestamp; ///< Audio packet timestamp
36 int sub_packet_cnt; // Subpacket counter, used while reading
37 int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container
38 int audio_framesize; /// Audio frame size from container
39 int sub_packet_lengths[16]; /// Length of each subpacket
47 int audio_stream_num; ///< Stream number for audio packets
48 int audio_pkt_cnt; ///< Output packet counter
51 static inline void get_strl(ByteIOContext *pb, char *buf, int buf_size, int len)
62 if (buf_size > 0) *q = '\0';
65 static void get_str8(ByteIOContext *pb, char *buf, int buf_size)
67 get_strl(pb, buf, buf_size, get_byte(pb));
70 static void rm_read_metadata(AVFormatContext *s, int wide)
74 for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {
75 int len = wide ? get_be16(s->pb) : get_byte(s->pb);
76 get_strl(s->pb, buf, sizeof(buf), len);
77 av_metadata_set(&s->metadata, ff_rm_metadata[i], buf);
81 RMStream *ff_rm_alloc_rmstream (void)
83 RMStream *rms = av_mallocz(sizeof(RMStream));
88 void ff_rm_free_rmstream (RMStream *rms)
90 av_free_packet(&rms->pkt);
93 static int rm_read_audio_stream_info(AVFormatContext *s, ByteIOContext *pb,
94 AVStream *st, RMStream *ast, int read_all)
100 version = get_be32(pb); /* version */
101 if (((version >> 16) & 0xff) == 3) {
102 int64_t startpos = url_ftell(pb);
104 rm_read_metadata(s, 0);
105 if ((startpos + (version & 0xffff)) >= url_ftell(pb) + 2) {
106 // fourcc (should always be "lpcJ")
108 get_str8(pb, buf, sizeof(buf));
110 // Skip extra header crap (this should never happen)
111 if ((startpos + (version & 0xffff)) > url_ftell(pb))
112 url_fskip(pb, (version & 0xffff) + startpos - url_ftell(pb));
113 st->codec->sample_rate = 8000;
114 st->codec->channels = 1;
115 st->codec->codec_type = CODEC_TYPE_AUDIO;
116 st->codec->codec_id = CODEC_ID_RA_144;
118 int flavor, sub_packet_h, coded_framesize, sub_packet_size;
119 /* old version (4) */
120 get_be32(pb); /* .ra4 */
121 get_be32(pb); /* data size */
122 get_be16(pb); /* version2 */
123 get_be32(pb); /* header size */
124 flavor= get_be16(pb); /* add codec info / flavor */
125 ast->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */
126 get_be32(pb); /* ??? */
127 get_be32(pb); /* ??? */
128 get_be32(pb); /* ??? */
129 ast->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */
130 st->codec->block_align= get_be16(pb); /* frame size */
131 ast->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */
132 get_be16(pb); /* ??? */
133 if (((version >> 16) & 0xff) == 5) {
134 get_be16(pb); get_be16(pb); get_be16(pb);
136 st->codec->sample_rate = get_be16(pb);
138 st->codec->channels = get_be16(pb);
139 if (((version >> 16) & 0xff) == 5) {
141 get_buffer(pb, buf, 4);
144 get_str8(pb, buf, sizeof(buf)); /* desc */
145 get_str8(pb, buf, sizeof(buf)); /* desc */
147 st->codec->codec_type = CODEC_TYPE_AUDIO;
148 if (!strcmp(buf, "dnet")) {
149 st->codec->codec_id = CODEC_ID_AC3;
150 st->need_parsing = AVSTREAM_PARSE_FULL;
151 } else if (!strcmp(buf, "28_8")) {
152 st->codec->codec_id = CODEC_ID_RA_288;
153 st->codec->extradata_size= 0;
154 ast->audio_framesize = st->codec->block_align;
155 st->codec->block_align = coded_framesize;
157 if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
158 av_log(s, AV_LOG_ERROR, "ast->audio_framesize * sub_packet_h too large\n");
162 av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h);
163 } else if ((!strcmp(buf, "cook")) || (!strcmp(buf, "atrc")) || (!strcmp(buf, "sipr"))) {
164 int codecdata_length;
165 get_be16(pb); get_byte(pb);
166 if (((version >> 16) & 0xff) == 5)
168 codecdata_length = get_be32(pb);
169 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
170 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
174 if(sub_packet_size <= 0){
175 av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
179 if (!strcmp(buf, "cook")) st->codec->codec_id = CODEC_ID_COOK;
180 else if (!strcmp(buf, "sipr")) st->codec->codec_id = CODEC_ID_SIPR;
181 else st->codec->codec_id = CODEC_ID_ATRAC3;
182 st->codec->extradata_size= codecdata_length;
183 st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
184 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
185 ast->audio_framesize = st->codec->block_align;
186 st->codec->block_align = ast->sub_packet_size;
188 if(ast->audio_framesize >= UINT_MAX / sub_packet_h){
189 av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
193 av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h);
194 } else if (!strcmp(buf, "raac") || !strcmp(buf, "racp")) {
195 int codecdata_length;
196 get_be16(pb); get_byte(pb);
197 if (((version >> 16) & 0xff) == 5)
199 st->codec->codec_id = CODEC_ID_AAC;
200 codecdata_length = get_be32(pb);
201 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
202 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
205 if (codecdata_length >= 1) {
206 st->codec->extradata_size = codecdata_length - 1;
207 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
209 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
212 st->codec->codec_id = CODEC_ID_NONE;
213 av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
219 rm_read_metadata(s, 0);
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(s, 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(s, 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);
295 /** this function assumes that the demuxer has already seeked to the start
296 * of the INDX chunk, and will bail out if not. */
297 static int rm_read_index(AVFormatContext *s)
299 ByteIOContext *pb = s->pb;
300 unsigned int size, n_pkts, str_id, next_off, n, pos, pts;
304 if (get_le32(pb) != MKTAG('I','N','D','X'))
310 n_pkts = get_be32(pb);
311 str_id = get_be16(pb);
312 next_off = get_be32(pb);
313 for (n = 0; n < s->nb_streams; n++)
314 if (s->streams[n]->id == str_id) {
318 if (n == s->nb_streams)
321 for (n = 0; n < n_pkts; n++) {
325 url_fskip(pb, 4); /* packet no. */
327 av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME);
331 if (next_off && url_ftell(pb) != next_off &&
332 url_fseek(pb, next_off, SEEK_SET) < 0)
339 static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap)
341 RMDemuxContext *rm = s->priv_data;
345 st = av_new_stream(s, 0);
348 st->priv_data = ff_rm_alloc_rmstream();
349 return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
352 static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
354 RMDemuxContext *rm = s->priv_data;
356 ByteIOContext *pb = s->pb;
359 unsigned int start_time, duration;
360 unsigned int data_off = 0, indx_off = 0;
365 if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
366 /* very old .ra format */
367 return rm_read_header_old(s, ap);
368 } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
372 get_be32(pb); /* header size */
375 get_be32(pb); /* number of headers */
381 tag_size = get_be32(pb);
384 printf("tag=%c%c%c%c (%08x) size=%d\n",
392 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
395 case MKTAG('P', 'R', 'O', 'P'):
397 get_be32(pb); /* max bit rate */
398 get_be32(pb); /* avg bit rate */
399 get_be32(pb); /* max packet size */
400 get_be32(pb); /* avg packet size */
401 get_be32(pb); /* nb packets */
402 get_be32(pb); /* duration */
403 get_be32(pb); /* preroll */
404 indx_off = get_be32(pb); /* index offset */
405 data_off = get_be32(pb); /* data offset */
406 get_be16(pb); /* nb streams */
407 flags = get_be16(pb); /* flags */
409 case MKTAG('C', 'O', 'N', 'T'):
410 rm_read_metadata(s, 1);
412 case MKTAG('M', 'D', 'P', 'R'):
413 st = av_new_stream(s, 0);
415 return AVERROR(ENOMEM);
416 st->id = get_be16(pb);
417 get_be32(pb); /* max bit rate */
418 st->codec->bit_rate = get_be32(pb); /* bit rate */
419 get_be32(pb); /* max packet size */
420 get_be32(pb); /* avg packet size */
421 start_time = get_be32(pb); /* start time */
422 get_be32(pb); /* preroll */
423 duration = get_be32(pb); /* duration */
424 st->start_time = start_time;
425 st->duration = duration;
426 get_str8(pb, buf, sizeof(buf)); /* desc */
427 get_str8(pb, buf, sizeof(buf)); /* mimetype */
428 st->codec->codec_type = CODEC_TYPE_DATA;
429 st->priv_data = ff_rm_alloc_rmstream();
430 if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
434 case MKTAG('D', 'A', 'T', 'A'):
437 /* unknown tag: skip it */
438 url_fskip(pb, tag_size - 10);
443 rm->nb_packets = get_be32(pb); /* number of packets */
444 if (!rm->nb_packets && (flags & 4))
445 rm->nb_packets = 3600 * 25;
446 get_be32(pb); /* next data header */
449 data_off = url_ftell(pb) - 18;
450 if (indx_off && url_fseek(pb, indx_off, SEEK_SET) >= 0) {
452 url_fseek(pb, data_off + 18, SEEK_SET);
458 static int get_num(ByteIOContext *pb, int *len)
470 return (n << 16) | n1;
474 /* multiple of 20 bytes for ra144 (ugly) */
475 #define RAW_PACKET_SIZE 1000
477 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
478 RMDemuxContext *rm = s->priv_data;
479 ByteIOContext *pb = s->pb;
480 int len, num, res, i;
482 uint32_t state=0xFFFFFFFF;
484 while(!url_feof(pb)){
485 *pos= url_ftell(pb) - 3;
486 if(rm->remaining_len > 0){
487 num= rm->current_stream;
488 len= rm->remaining_len;
489 *timestamp = AV_NOPTS_VALUE;
492 state= (state<<8) + get_byte(pb);
494 if(state == MKBETAG('I', 'N', 'D', 'X')){
495 int n_pkts, expected_len;
498 n_pkts = get_be32(pb);
499 expected_len = 20 + n_pkts * 14;
501 /* some files don't add index entries to chunk size... */
503 else if (len != expected_len)
504 av_log(s, AV_LOG_WARNING,
505 "Index size %d (%d pkts) is wrong, should be %d.\n",
506 len, n_pkts, expected_len);
507 len -= 14; // we already read part of the index header
513 if(state > (unsigned)0xFFFF || state < 12)
519 *timestamp = get_be32(pb);
520 res= get_byte(pb); /* reserved */
521 *flags = get_byte(pb); /* flags */
526 for(i=0;i<s->nb_streams;i++) {
531 if (i == s->nb_streams) {
533 /* skip packet if unknown number */
535 rm->remaining_len = 0;
545 static int rm_assemble_video_frame(AVFormatContext *s, ByteIOContext *pb,
546 RMDemuxContext *rm, RMStream *vst,
547 AVPacket *pkt, int len, int *pseq)
549 int hdr, seq, pic_num, len2, pos;
552 hdr = get_byte(pb); len--;
555 if(type != 3){ // not frame as a part of packet
556 seq = get_byte(pb); len--;
558 if(type != 1){ // not whole frame
559 len2 = get_num(pb, &len);
560 pos = get_num(pb, &len);
561 pic_num = get_byte(pb); len--;
565 rm->remaining_len = len;
566 if(type&1){ // frame, not slice
567 if(type == 3) // frame as a part of packet
569 if(rm->remaining_len < len)
571 rm->remaining_len -= len;
572 if(av_new_packet(pkt, len + 9) < 0)
575 AV_WL32(pkt->data + 1, 1);
576 AV_WL32(pkt->data + 5, 0);
577 get_buffer(pb, pkt->data + 9, len);
580 //now we have to deal with single slice
583 if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
584 vst->slices = ((hdr & 0x3F) << 1) + 1;
585 vst->videobufsize = len2 + 8*vst->slices + 1;
586 av_free_packet(&vst->pkt); //FIXME this should be output.
587 if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
588 return AVERROR(ENOMEM);
589 vst->videobufpos = 8*vst->slices + 1;
591 vst->curpic_num = pic_num;
592 vst->pktpos = url_ftell(pb);
595 len = FFMIN(len, pos);
597 if(++vst->cur_slice > vst->slices)
599 AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
600 AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
601 if(vst->videobufpos + len > vst->videobufsize)
603 if (get_buffer(pb, vst->pkt.data + vst->videobufpos, len) != len)
605 vst->videobufpos += len;
606 rm->remaining_len-= len;
608 if(type == 2 || (vst->videobufpos) == vst->videobufsize){
609 vst->pkt.data[0] = vst->cur_slice-1;
613 if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
614 memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
615 vst->videobufpos - 1 - 8*vst->slices);
616 pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);
617 pkt->pts = AV_NOPTS_VALUE;
618 pkt->pos = vst->pktpos;
626 rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
631 if (st->codec->codec_id == CODEC_ID_AC3) {
633 for (j=0;j<pkt->size;j+=2) {
634 FFSWAP(int, ptr[0], ptr[1]);
641 ff_rm_parse_packet (AVFormatContext *s, ByteIOContext *pb,
642 AVStream *st, RMStream *ast, int len, AVPacket *pkt,
643 int *seq, int *flags, int64_t *timestamp)
645 RMDemuxContext *rm = s->priv_data;
647 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
648 rm->current_stream= st->id;
649 if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq))
650 return -1; //got partial frame
651 } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
652 if ((st->codec->codec_id == CODEC_ID_RA_288) ||
653 (st->codec->codec_id == CODEC_ID_COOK) ||
654 (st->codec->codec_id == CODEC_ID_ATRAC3) ||
655 (st->codec->codec_id == CODEC_ID_SIPR)) {
657 int sps = ast->sub_packet_size;
658 int cfs = ast->coded_framesize;
659 int h = ast->sub_packet_h;
660 int y = ast->sub_packet_cnt;
661 int w = ast->audio_framesize;
664 y = ast->sub_packet_cnt = 0;
666 ast->audiotimestamp = *timestamp;
668 switch(st->codec->codec_id) {
669 case CODEC_ID_RA_288:
670 for (x = 0; x < h/2; x++)
671 get_buffer(pb, ast->pkt.data+x*2*w+y*cfs, cfs);
673 case CODEC_ID_ATRAC3:
675 for (x = 0; x < w/sps; x++)
676 get_buffer(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
680 if (++(ast->sub_packet_cnt) < h)
682 ast->sub_packet_cnt = 0;
683 rm->audio_stream_num = st->index;
684 rm->audio_pkt_cnt = h * w / st->codec->block_align;
685 } else if (st->codec->codec_id == CODEC_ID_AAC) {
687 rm->audio_stream_num = st->index;
688 ast->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4;
689 if (ast->sub_packet_cnt) {
690 for (x = 0; x < ast->sub_packet_cnt; x++)
691 ast->sub_packet_lengths[x] = get_be16(pb);
692 rm->audio_pkt_cnt = ast->sub_packet_cnt;
693 ast->audiotimestamp = *timestamp;
697 av_get_packet(pb, pkt, len);
698 rm_ac3_swap_bytes(st, pkt);
701 av_get_packet(pb, pkt, len);
703 pkt->stream_index = st->index;
706 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
707 if(st->codec->codec_id == CODEC_ID_RV20){
708 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
709 av_log(s, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
711 seq |= (*timestamp&~0x3FFF);
712 if(seq - *timestamp > 0x2000) seq -= 0x4000;
713 if(seq - *timestamp < -0x2000) seq += 0x4000;
718 pkt->pts= *timestamp;
720 pkt->flags |= PKT_FLAG_KEY;
722 return st->codec->codec_type == CODEC_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
726 ff_rm_retrieve_cache (AVFormatContext *s, ByteIOContext *pb,
727 AVStream *st, RMStream *ast, AVPacket *pkt)
729 RMDemuxContext *rm = s->priv_data;
731 assert (rm->audio_pkt_cnt > 0);
733 if (st->codec->codec_id == CODEC_ID_AAC)
734 av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
736 av_new_packet(pkt, st->codec->block_align);
737 memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this
738 (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
739 st->codec->block_align);
742 if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) {
743 ast->audiotimestamp = AV_NOPTS_VALUE;
744 pkt->flags = PKT_FLAG_KEY;
747 pkt->stream_index = st->index;
749 return rm->audio_pkt_cnt;
752 static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
754 RMDemuxContext *rm = s->priv_data;
756 int i, len, res, seq = 1;
757 int64_t timestamp, pos;
758 int old_flags, flags;
761 if (rm->audio_pkt_cnt) {
762 // If there are queued audio packet return them first
763 st = s->streams[rm->audio_stream_num];
764 ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
766 if (rm->old_format) {
771 timestamp = AV_NOPTS_VALUE;
772 len = !ast->audio_framesize ? RAW_PACKET_SIZE :
773 ast->coded_framesize * ast->sub_packet_h / 2;
774 flags = (seq++ == 1) ? 2 : 0;
776 len=sync(s, ×tamp, &flags, &i, &pos);
781 if(len<0 || url_feof(s->pb))
785 res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
786 &seq, &flags, ×tamp);
787 if((old_flags&2) && (seq&0x7F) == 1)
788 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
793 if( (st->discard >= AVDISCARD_NONKEY && !(flags&2))
794 || st->discard >= AVDISCARD_ALL){
803 static int rm_read_close(AVFormatContext *s)
807 for (i=0;i<s->nb_streams;i++)
808 ff_rm_free_rmstream(s->streams[i]->priv_data);
813 static int rm_probe(AVProbeData *p)
815 /* check file header */
816 if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
817 p->buf[2] == 'M' && p->buf[3] == 'F' &&
818 p->buf[4] == 0 && p->buf[5] == 0) ||
819 (p->buf[0] == '.' && p->buf[1] == 'r' &&
820 p->buf[2] == 'a' && p->buf[3] == 0xfd))
821 return AVPROBE_SCORE_MAX;
826 static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
827 int64_t *ppos, int64_t pos_limit)
829 RMDemuxContext *rm = s->priv_data;
831 int stream_index2, flags, len, h;
836 return AV_NOPTS_VALUE;
838 url_fseek(s->pb, pos, SEEK_SET);
844 len=sync(s, &dts, &flags, &stream_index2, &pos);
846 return AV_NOPTS_VALUE;
848 st = s->streams[stream_index2];
849 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
850 h= get_byte(s->pb); len--;
852 seq = get_byte(s->pb); len--;
856 if((flags&2) && (seq&0x7F) == 1){
857 // av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);
858 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
859 if(stream_index2 == stream_index)
863 url_fskip(s->pb, len);
869 AVInputFormat rm_demuxer = {
871 NULL_IF_CONFIG_SMALL("RealMedia format"),
872 sizeof(RMDemuxContext),
881 AVInputFormat rdt_demuxer = {
883 NULL_IF_CONFIG_SMALL("RDT demuxer"),
884 sizeof(RMDemuxContext),