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author | Aurelien Jacobs <aurel@gnuage.org> | 2007-05-30 09:44:16 +0000 |
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committer | Aurelien Jacobs <aurel@gnuage.org> | 2007-05-30 09:44:16 +0000 |
commit | 7b2a2ce5561ca33006de84dae6c1263611bf1fd9 (patch) | |
tree | d0c98b2f2ffd014efa4e42a09018e95937cc95a6 /libavformat/rmdec.c | |
parent | 2db27aadcb6e7543321d5d68d06b2fdc4fd63491 (diff) | |
download | ffmpeg-streaming-7b2a2ce5561ca33006de84dae6c1263611bf1fd9.zip ffmpeg-streaming-7b2a2ce5561ca33006de84dae6c1263611bf1fd9.tar.gz |
split rm muxer and demuxer in their own files
Originally committed as revision 9156 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavformat/rmdec.c')
-rw-r--r-- | libavformat/rmdec.c | 696 |
1 files changed, 696 insertions, 0 deletions
diff --git a/libavformat/rmdec.c b/libavformat/rmdec.c new file mode 100644 index 0000000..39219b1 --- /dev/null +++ b/libavformat/rmdec.c @@ -0,0 +1,696 @@ +/* + * "Real" compatible demuxer. + * Copyright (c) 2000, 2001 Fabrice Bellard. + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ +#include "avformat.h" +#include "rm.h" + + +static void get_str(ByteIOContext *pb, char *buf, int buf_size) +{ + int len, i; + char *q; + + len = get_be16(pb); + q = buf; + for(i=0;i<len;i++) { + if (i < buf_size - 1) + *q++ = get_byte(pb); + } + *q = '\0'; +} + +static void get_str8(ByteIOContext *pb, char *buf, int buf_size) +{ + int len, i; + char *q; + + len = get_byte(pb); + q = buf; + for(i=0;i<len;i++) { + if (i < buf_size - 1) + *q++ = get_byte(pb); + } + *q = '\0'; +} + +static int rm_read_audio_stream_info(AVFormatContext *s, AVStream *st, + int read_all) +{ + RMContext *rm = s->priv_data; + ByteIOContext *pb = &s->pb; + char buf[256]; + uint32_t version; + int i; + + /* ra type header */ + version = get_be32(pb); /* version */ + if (((version >> 16) & 0xff) == 3) { + int64_t startpos = url_ftell(pb); + /* very old version */ + for(i = 0; i < 14; i++) + get_byte(pb); + get_str8(pb, s->title, sizeof(s->title)); + get_str8(pb, s->author, sizeof(s->author)); + get_str8(pb, s->copyright, sizeof(s->copyright)); + get_str8(pb, s->comment, sizeof(s->comment)); + if ((startpos + (version & 0xffff)) >= url_ftell(pb) + 2) { + // fourcc (should always be "lpcJ") + get_byte(pb); + get_str8(pb, buf, sizeof(buf)); + } + // Skip extra header crap (this should never happen) + if ((startpos + (version & 0xffff)) > url_ftell(pb)) + url_fskip(pb, (version & 0xffff) + startpos - url_ftell(pb)); + st->codec->sample_rate = 8000; + st->codec->channels = 1; + st->codec->codec_type = CODEC_TYPE_AUDIO; + st->codec->codec_id = CODEC_ID_RA_144; + } else { + int flavor, sub_packet_h, coded_framesize, sub_packet_size; + /* old version (4) */ + get_be32(pb); /* .ra4 */ + get_be32(pb); /* data size */ + get_be16(pb); /* version2 */ + get_be32(pb); /* header size */ + flavor= get_be16(pb); /* add codec info / flavor */ + rm->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */ + get_be32(pb); /* ??? */ + get_be32(pb); /* ??? */ + get_be32(pb); /* ??? */ + rm->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */ + st->codec->block_align= get_be16(pb); /* frame size */ + rm->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */ + get_be16(pb); /* ??? */ + if (((version >> 16) & 0xff) == 5) { + get_be16(pb); get_be16(pb); get_be16(pb); } + st->codec->sample_rate = get_be16(pb); + get_be32(pb); + st->codec->channels = get_be16(pb); + if (((version >> 16) & 0xff) == 5) { + get_be32(pb); + buf[0] = get_byte(pb); + buf[1] = get_byte(pb); + buf[2] = get_byte(pb); + buf[3] = get_byte(pb); + buf[4] = 0; + } else { + get_str8(pb, buf, sizeof(buf)); /* desc */ + get_str8(pb, buf, sizeof(buf)); /* desc */ + } + st->codec->codec_type = CODEC_TYPE_AUDIO; + if (!strcmp(buf, "dnet")) { + st->codec->codec_id = CODEC_ID_AC3; + } else if (!strcmp(buf, "28_8")) { + st->codec->codec_id = CODEC_ID_RA_288; + st->codec->extradata_size= 0; + rm->audio_framesize = st->codec->block_align; + st->codec->block_align = coded_framesize; + + if(rm->audio_framesize >= UINT_MAX / sub_packet_h){ + av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n"); + return -1; + } + + rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h); + } else if ((!strcmp(buf, "cook")) || (!strcmp(buf, "atrc"))) { + int codecdata_length, i; + get_be16(pb); get_byte(pb); + if (((version >> 16) & 0xff) == 5) + get_byte(pb); + codecdata_length = get_be32(pb); + if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){ + av_log(s, AV_LOG_ERROR, "codecdata_length too large\n"); + return -1; + } + + if (!strcmp(buf, "cook")) st->codec->codec_id = CODEC_ID_COOK; + else st->codec->codec_id = CODEC_ID_ATRAC3; + st->codec->extradata_size= codecdata_length; + st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); + for(i = 0; i < codecdata_length; i++) + ((uint8_t*)st->codec->extradata)[i] = get_byte(pb); + rm->audio_framesize = st->codec->block_align; + st->codec->block_align = rm->sub_packet_size; + + if(rm->audio_framesize >= UINT_MAX / sub_packet_h){ + av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n"); + return -1; + } + + rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h); + } else if (!strcmp(buf, "raac") || !strcmp(buf, "racp")) { + int codecdata_length, i; + get_be16(pb); get_byte(pb); + if (((version >> 16) & 0xff) == 5) + get_byte(pb); + st->codec->codec_id = CODEC_ID_AAC; + codecdata_length = get_be32(pb); + if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){ + av_log(s, AV_LOG_ERROR, "codecdata_length too large\n"); + return -1; + } + if (codecdata_length >= 1) { + st->codec->extradata_size = codecdata_length - 1; + st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); + get_byte(pb); + for(i = 0; i < st->codec->extradata_size; i++) + ((uint8_t*)st->codec->extradata)[i] = get_byte(pb); + } + } else { + st->codec->codec_id = CODEC_ID_NONE; + pstrcpy(st->codec->codec_name, sizeof(st->codec->codec_name), + buf); + } + if (read_all) { + get_byte(pb); + get_byte(pb); + get_byte(pb); + + get_str8(pb, s->title, sizeof(s->title)); + get_str8(pb, s->author, sizeof(s->author)); + get_str8(pb, s->copyright, sizeof(s->copyright)); + get_str8(pb, s->comment, sizeof(s->comment)); + } + } + return 0; +} + +static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap) +{ + RMContext *rm = s->priv_data; + AVStream *st; + + rm->old_format = 1; + st = av_new_stream(s, 0); + if (!st) + return -1; + return rm_read_audio_stream_info(s, st, 1); +} + +static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap) +{ + RMContext *rm = s->priv_data; + AVStream *st; + ByteIOContext *pb = &s->pb; + unsigned int tag, v; + int tag_size, size, codec_data_size, i; + int64_t codec_pos; + unsigned int start_time, duration; + char buf[128]; + int flags = 0; + + tag = get_le32(pb); + if (tag == MKTAG('.', 'r', 'a', 0xfd)) { + /* very old .ra format */ + return rm_read_header_old(s, ap); + } else if (tag != MKTAG('.', 'R', 'M', 'F')) { + return AVERROR_IO; + } + + get_be32(pb); /* header size */ + get_be16(pb); + get_be32(pb); + get_be32(pb); /* number of headers */ + + for(;;) { + if (url_feof(pb)) + goto fail; + tag = get_le32(pb); + tag_size = get_be32(pb); + get_be16(pb); +#if 0 + printf("tag=%c%c%c%c (%08x) size=%d\n", + (tag) & 0xff, + (tag >> 8) & 0xff, + (tag >> 16) & 0xff, + (tag >> 24) & 0xff, + tag, + tag_size); +#endif + if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A')) + goto fail; + switch(tag) { + case MKTAG('P', 'R', 'O', 'P'): + /* file header */ + get_be32(pb); /* max bit rate */ + get_be32(pb); /* avg bit rate */ + get_be32(pb); /* max packet size */ + get_be32(pb); /* avg packet size */ + get_be32(pb); /* nb packets */ + get_be32(pb); /* duration */ + get_be32(pb); /* preroll */ + get_be32(pb); /* index offset */ + get_be32(pb); /* data offset */ + get_be16(pb); /* nb streams */ + flags = get_be16(pb); /* flags */ + break; + case MKTAG('C', 'O', 'N', 'T'): + get_str(pb, s->title, sizeof(s->title)); + get_str(pb, s->author, sizeof(s->author)); + get_str(pb, s->copyright, sizeof(s->copyright)); + get_str(pb, s->comment, sizeof(s->comment)); + break; + case MKTAG('M', 'D', 'P', 'R'): + st = av_new_stream(s, 0); + if (!st) + goto fail; + st->id = get_be16(pb); + get_be32(pb); /* max bit rate */ + st->codec->bit_rate = get_be32(pb); /* bit rate */ + get_be32(pb); /* max packet size */ + get_be32(pb); /* avg packet size */ + start_time = get_be32(pb); /* start time */ + get_be32(pb); /* preroll */ + duration = get_be32(pb); /* duration */ + st->start_time = start_time; + st->duration = duration; + get_str8(pb, buf, sizeof(buf)); /* desc */ + get_str8(pb, buf, sizeof(buf)); /* mimetype */ + codec_data_size = get_be32(pb); + codec_pos = url_ftell(pb); + st->codec->codec_type = CODEC_TYPE_DATA; + av_set_pts_info(st, 64, 1, 1000); + + v = get_be32(pb); + if (v == MKTAG(0xfd, 'a', 'r', '.')) { + /* ra type header */ + if (rm_read_audio_stream_info(s, st, 0)) + return -1; + } else { + int fps, fps2; + if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) { + fail1: + av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n"); + goto skip; + } + st->codec->codec_tag = get_le32(pb); +// av_log(NULL, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0')); + if ( st->codec->codec_tag != MKTAG('R', 'V', '1', '0') + && st->codec->codec_tag != MKTAG('R', 'V', '2', '0') + && st->codec->codec_tag != MKTAG('R', 'V', '3', '0') + && st->codec->codec_tag != MKTAG('R', 'V', '4', '0')) + goto fail1; + st->codec->width = get_be16(pb); + st->codec->height = get_be16(pb); + st->codec->time_base.num= 1; + fps= get_be16(pb); + st->codec->codec_type = CODEC_TYPE_VIDEO; + get_be32(pb); + fps2= get_be16(pb); + get_be16(pb); + + st->codec->extradata_size= codec_data_size - (url_ftell(pb) - codec_pos); + + if(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){ + //check is redundant as get_buffer() will catch this + av_log(s, AV_LOG_ERROR, "st->codec->extradata_size too large\n"); + return -1; + } + st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); + get_buffer(pb, st->codec->extradata, st->codec->extradata_size); + +// av_log(NULL, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2); + st->codec->time_base.den = fps * st->codec->time_base.num; + switch(((uint8_t*)st->codec->extradata)[4]>>4){ + case 1: st->codec->codec_id = CODEC_ID_RV10; break; + case 2: st->codec->codec_id = CODEC_ID_RV20; break; + case 3: st->codec->codec_id = CODEC_ID_RV30; break; + case 4: st->codec->codec_id = CODEC_ID_RV40; break; + default: goto fail1; + } + } +skip: + /* skip codec info */ + size = url_ftell(pb) - codec_pos; + url_fskip(pb, codec_data_size - size); + break; + case MKTAG('D', 'A', 'T', 'A'): + goto header_end; + default: + /* unknown tag: skip it */ + url_fskip(pb, tag_size - 10); + break; + } + } + header_end: + rm->nb_packets = get_be32(pb); /* number of packets */ + if (!rm->nb_packets && (flags & 4)) + rm->nb_packets = 3600 * 25; + get_be32(pb); /* next data header */ + return 0; + + fail: + for(i=0;i<s->nb_streams;i++) { + av_free(s->streams[i]); + } + return AVERROR_IO; +} + +static int get_num(ByteIOContext *pb, int *len) +{ + int n, n1; + + n = get_be16(pb); + (*len)-=2; + if (n >= 0x4000) { + return n - 0x4000; + } else { + n1 = get_be16(pb); + (*len)-=2; + return (n << 16) | n1; + } +} + +/* multiple of 20 bytes for ra144 (ugly) */ +#define RAW_PACKET_SIZE 1000 + +static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){ + RMContext *rm = s->priv_data; + ByteIOContext *pb = &s->pb; + int len, num, res, i; + AVStream *st; + uint32_t state=0xFFFFFFFF; + + while(!url_feof(pb)){ + *pos= url_ftell(pb); + if(rm->remaining_len > 0){ + num= rm->current_stream; + len= rm->remaining_len; + *timestamp = AV_NOPTS_VALUE; + *flags= 0; + }else{ + state= (state<<8) + get_byte(pb); + + if(state == MKBETAG('I', 'N', 'D', 'X')){ + len = get_be16(pb) - 6; + if(len<0) + continue; + goto skip; + } + + if(state > (unsigned)0xFFFF || state < 12) + continue; + len=state; + state= 0xFFFFFFFF; + + num = get_be16(pb); + *timestamp = get_be32(pb); + res= get_byte(pb); /* reserved */ + *flags = get_byte(pb); /* flags */ + + + len -= 12; + } + for(i=0;i<s->nb_streams;i++) { + st = s->streams[i]; + if (num == st->id) + break; + } + if (i == s->nb_streams) { +skip: + /* skip packet if unknown number */ + url_fskip(pb, len); + rm->remaining_len -= len; + continue; + } + *stream_index= i; + + return len; + } + return -1; +} + +static int rm_read_packet(AVFormatContext *s, AVPacket *pkt) +{ + RMContext *rm = s->priv_data; + ByteIOContext *pb = &s->pb; + AVStream *st; + int i, len, tmp, j; + int64_t timestamp, pos; + uint8_t *ptr; + int flags; + + if (rm->audio_pkt_cnt) { + // If there are queued audio packet return them first + st = s->streams[rm->audio_stream_num]; + if (st->codec->codec_id == CODEC_ID_AAC) + av_get_packet(pb, pkt, rm->sub_packet_lengths[rm->sub_packet_cnt - rm->audio_pkt_cnt]); + else { + av_new_packet(pkt, st->codec->block_align); + memcpy(pkt->data, rm->audiobuf + st->codec->block_align * + (rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt), + st->codec->block_align); + } + rm->audio_pkt_cnt--; + pkt->flags = 0; + pkt->stream_index = rm->audio_stream_num; + } else if (rm->old_format) { + st = s->streams[0]; + if (st->codec->codec_id == CODEC_ID_RA_288) { + int x, y; + + for (y = 0; y < rm->sub_packet_h; y++) + for (x = 0; x < rm->sub_packet_h/2; x++) + if (get_buffer(pb, rm->audiobuf+x*2*rm->audio_framesize+y*rm->coded_framesize, rm->coded_framesize) <= 0) + return AVERROR_IO; + rm->audio_stream_num = 0; + rm->audio_pkt_cnt = rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - 1; + // Release first audio packet + av_new_packet(pkt, st->codec->block_align); + memcpy(pkt->data, rm->audiobuf, st->codec->block_align); + pkt->flags |= PKT_FLAG_KEY; // Mark first packet as keyframe + pkt->stream_index = 0; + } else { + /* just read raw bytes */ + len = RAW_PACKET_SIZE; + len= av_get_packet(pb, pkt, len); + pkt->stream_index = 0; + if (len <= 0) { + return AVERROR_IO; + } + pkt->size = len; + } + } else { + int seq=1; +resync: + len=sync(s, ×tamp, &flags, &i, &pos); + if(len<0) + return AVERROR_IO; + st = s->streams[i]; + + if (st->codec->codec_type == CODEC_TYPE_VIDEO) { + int h, pic_num, len2, pos; + + h= get_byte(pb); len--; + if(!(h & 0x40)){ + seq = get_byte(pb); len--; + } + + if((h & 0xc0) == 0x40){ + len2= pos= 0; + }else{ + len2 = get_num(pb, &len); + pos = get_num(pb, &len); + } + /* picture number */ + pic_num= get_byte(pb); len--; + rm->remaining_len= len; + rm->current_stream= st->id; + +// av_log(NULL, AV_LOG_DEBUG, "%X len:%d pos:%d len2:%d pic_num:%d\n",h, len, pos, len2, pic_num); + if(len2 && len2<len) + len=len2; + rm->remaining_len-= len; + av_get_packet(pb, pkt, len); + + } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) { + if ((st->codec->codec_id == CODEC_ID_RA_288) || + (st->codec->codec_id == CODEC_ID_COOK) || + (st->codec->codec_id == CODEC_ID_ATRAC3)) { + int x; + int sps = rm->sub_packet_size; + int cfs = rm->coded_framesize; + int h = rm->sub_packet_h; + int y = rm->sub_packet_cnt; + int w = rm->audio_framesize; + + if (flags & 2) + y = rm->sub_packet_cnt = 0; + if (!y) + rm->audiotimestamp = timestamp; + + switch(st->codec->codec_id) { + case CODEC_ID_RA_288: + for (x = 0; x < h/2; x++) + get_buffer(pb, rm->audiobuf+x*2*w+y*cfs, cfs); + break; + case CODEC_ID_ATRAC3: + case CODEC_ID_COOK: + for (x = 0; x < w/sps; x++) + get_buffer(pb, rm->audiobuf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps); + break; + } + + if (++(rm->sub_packet_cnt) < h) + goto resync; + else { + rm->sub_packet_cnt = 0; + rm->audio_stream_num = i; + rm->audio_pkt_cnt = h * w / st->codec->block_align - 1; + // Release first audio packet + av_new_packet(pkt, st->codec->block_align); + memcpy(pkt->data, rm->audiobuf, st->codec->block_align); + timestamp = rm->audiotimestamp; + flags = 2; // Mark first packet as keyframe + } + } else if (st->codec->codec_id == CODEC_ID_AAC) { + int x; + rm->audio_stream_num = i; + rm->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4; + if (rm->sub_packet_cnt) { + for (x = 0; x < rm->sub_packet_cnt; x++) + rm->sub_packet_lengths[x] = get_be16(pb); + // Release first audio packet + rm->audio_pkt_cnt = rm->sub_packet_cnt - 1; + av_get_packet(pb, pkt, rm->sub_packet_lengths[0]); + flags = 2; // Mark first packet as keyframe + } + } else + av_get_packet(pb, pkt, len); + + } else + av_get_packet(pb, pkt, len); + + if( (st->discard >= AVDISCARD_NONKEY && !(flags&2)) + || st->discard >= AVDISCARD_ALL){ + av_free_packet(pkt); + goto resync; + } + + pkt->stream_index = i; + +#if 0 + if (st->codec->codec_type == CODEC_TYPE_VIDEO) { + if(st->codec->codec_id == CODEC_ID_RV20){ + int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1); + av_log(NULL, AV_LOG_DEBUG, "%d %"PRId64" %d\n", timestamp, timestamp*512LL/25, seq); + + seq |= (timestamp&~0x3FFF); + if(seq - timestamp > 0x2000) seq -= 0x4000; + if(seq - timestamp < -0x2000) seq += 0x4000; + } + } +#endif + pkt->pts= timestamp; + if(flags&2){ + pkt->flags |= PKT_FLAG_KEY; + if((seq&0x7F) == 1) + av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME); + } + } + + /* for AC3, needs to swap bytes */ + if (st->codec->codec_id == CODEC_ID_AC3) { + ptr = pkt->data; + for(j=0;j<len;j+=2) { + tmp = ptr[0]; + ptr[0] = ptr[1]; + ptr[1] = tmp; + ptr += 2; + } + } + return 0; +} + +static int rm_read_close(AVFormatContext *s) +{ + RMContext *rm = s->priv_data; + + av_free(rm->audiobuf); + return 0; +} + +static int rm_probe(AVProbeData *p) +{ + /* check file header */ + if ((p->buf[0] == '.' && p->buf[1] == 'R' && + p->buf[2] == 'M' && p->buf[3] == 'F' && + p->buf[4] == 0 && p->buf[5] == 0) || + (p->buf[0] == '.' && p->buf[1] == 'r' && + p->buf[2] == 'a' && p->buf[3] == 0xfd)) + return AVPROBE_SCORE_MAX; + else + return 0; +} + +static int64_t rm_read_dts(AVFormatContext *s, int stream_index, + int64_t *ppos, int64_t pos_limit) +{ + RMContext *rm = s->priv_data; + int64_t pos, dts; + int stream_index2, flags, len, h; + + pos = *ppos; + + if(rm->old_format) + return AV_NOPTS_VALUE; + + url_fseek(&s->pb, pos, SEEK_SET); + rm->remaining_len=0; + for(;;){ + int seq=1; + AVStream *st; + + len=sync(s, &dts, &flags, &stream_index2, &pos); + if(len<0) + return AV_NOPTS_VALUE; + + st = s->streams[stream_index2]; + if (st->codec->codec_type == CODEC_TYPE_VIDEO) { + h= get_byte(&s->pb); len--; + if(!(h & 0x40)){ + seq = get_byte(&s->pb); len--; + } + } + + if((flags&2) && (seq&0x7F) == 1){ +// av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq); + av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME); + if(stream_index2 == stream_index) + break; + } + + url_fskip(&s->pb, len); + } + *ppos = pos; + return dts; +} + +AVInputFormat rm_demuxer = { + "rm", + "rm format", + sizeof(RMContext), + rm_probe, + rm_read_header, + rm_read_packet, + rm_read_close, + NULL, + rm_read_dts, +}; |