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mpegts: Add support for Sections in PMT

This commit is contained in:
Alex Converse 2011-10-05 18:24:17 -07:00
parent fec2836483
commit 4682a1dc3a
3 changed files with 39 additions and 7 deletions
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40
libavformat/mpegts.c
View File

@ -1014,9 +1014,28 @@ static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
return 0;
}
static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
{
MpegTSContext *ts = filter->u.section_filter.opaque;
SectionHeader h1, *h = &h1;
const uint8_t *p, *p_end;
av_dlog(ts->stream, "m4SL/od:\n");
hex_dump_debug(ts->stream, (uint8_t *)section, section_len);
p_end = section + section_len - 4;
p = section;
if (parse_section_header(h, &p, p_end) < 0)
return;
if (h->tid != M4OD_TID)
return;
}
int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
const uint8_t **pp, const uint8_t *desc_list_end,
Mp4Descr *mp4_descr, int mp4_descr_count, int pid)
Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
MpegTSContext *ts)
{
const uint8_t *desc_end;
int desc_len, desc_tag, desc_es_id;
@ -1052,6 +1071,8 @@ int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type
if (st->codec->codec_id == CODEC_ID_AAC &&
st->codec->extradata_size > 0)
st->need_parsing = 0;
if (st->codec->codec_id == CODEC_ID_MPEG4SYSTEMS)
mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
}
break;
case 0x1F: /* FMC descriptor */
@ -1207,6 +1228,7 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
for(;;) {
st = 0;
pes = NULL;
stream_type = get8(&p, p_end);
if (stream_type < 0)
break;
@ -1222,19 +1244,27 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
st->id = pes->pid;
}
st = pes->st;
} else {
} else if (stream_type != 0x13) {
if (ts->pids[pid]) mpegts_close_filter(ts, ts->pids[pid]); //wrongly added sdt filter probably
pes = add_pes_stream(ts, pid, pcr_pid);
if (pes) {
st = avformat_new_stream(pes->stream, NULL);
st->id = pes->pid;
}
} else {
int idx = ff_find_stream_index(ts->stream, pid);
if (idx >= 0) {
st = ts->stream->streams[idx];
} else {
st = avformat_new_stream(pes->stream, NULL);
st->id = pid;
}
}
if (!st)
goto out;
if (!pes->stream_type)
if (pes && !pes->stream_type)
mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
add_pid_to_pmt(ts, h->id, pid);
@ -1249,10 +1279,10 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
break;
for(;;) {
if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p, desc_list_end,
mp4_descr, mp4_descr_count, pid) < 0)
mp4_descr, mp4_descr_count, pid, ts) < 0)
break;
if (prog_reg_desc == AV_RL32("HDMV") && stream_type == 0x83 && pes->sub_st) {
if (pes && prog_reg_desc == AV_RL32("HDMV") && stream_type == 0x83 && pes->sub_st) {
ff_program_add_stream_index(ts->stream, h->id, pes->sub_st->index);
pes->sub_st->codec->codec_tag = st->codec->codec_tag;
}

4
libavformat/mpegts.h
View File

@ -39,6 +39,7 @@
/* table ids */
#define PAT_TID 0x00
#define PMT_TID 0x02
#define M4OD_TID 0x05
#define SDT_TID 0x42
#define STREAM_TYPE_VIDEO_MPEG1 0x01
@ -85,6 +86,7 @@ typedef struct {
*/
int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
const uint8_t **pp, const uint8_t *desc_list_end,
Mp4Descr *mp4_descr, int mp4_descr_count, int pid);
Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
MpegTSContext *ts);
#endif /* AVFORMAT_MPEGTS_H */

2
libavformat/wtv.c
View File

@ -837,7 +837,7 @@ static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_p
buf_size = FFMIN(len - consumed, sizeof(buf));
avio_read(pb, buf, buf_size);
consumed += buf_size;
ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, NULL, 0, 0);
ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, NULL, 0, 0, NULL);
}
} else if (!ff_guidcmp(g, EVENTID_AudioTypeSpanningEvent)) {
int stream_index = ff_find_stream_index(s, sid);