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lavf/mpegts: SCTE-35 extraction from mpegts

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Reviewed-by: Marton Balint <cus@passwd.hu>
Acked-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Carlos Fernandez <carlos@ccextractor.org>
Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Carlos Fernandez 2016-10-18 17:36:28 -07:00 committed by Marton Balint
parent d53a120ad6
commit 5db3c9476c
1 changed files with 45 additions and 1 deletions
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46
libavformat/mpegts.c
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@ -725,6 +725,12 @@ static const StreamType HDMV_types[] = {
{ 0 },
};
/* SCTE types */
static const StreamType SCTE_types[] = {
{ 0x86, AVMEDIA_TYPE_DATA, AV_CODEC_ID_SCTE_35 },
{ 0 },
};
/* ATSC ? */
static const StreamType MISC_types[] = {
{ 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
@ -872,6 +878,13 @@ static void reset_pes_packet_state(PESContext *pes)
av_buffer_unref(&pes->buffer);
}
static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
{
av_init_packet(pkt);
pkt->data = buffer;
pkt->size = len;
}
static int new_pes_packet(PESContext *pes, AVPacket *pkt)
{
char *sd;
@ -1590,6 +1603,27 @@ static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
av_free(mp4_descr[i].dec_config_descr);
}
static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section,
int section_len)
{
AVProgram *prg = NULL;
MpegTSContext *ts = filter->u.section_filter.opaque;
int idx = ff_find_stream_index(ts->stream, filter->pid);
new_data_packet(section, section_len, ts->pkt);
if (idx >= 0) {
ts->pkt->stream_index = idx;
}
prg = av_find_program_from_stream(ts->stream, NULL, idx);
if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
MpegTSFilter *f = ts->pids[prg->pcr_pid];
if (f)
ts->pkt->pts = ts->pkt->dts = f->last_pcr/300;
}
ts->stop_parse = 1;
}
static const uint8_t opus_coupled_stream_cnt[9] = {
1, 0, 1, 1, 2, 2, 2, 3, 3
};
@ -1868,6 +1902,12 @@ int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type
return 0;
}
static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
{
return !(stream_type == 0x13 ||
(stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) );
}
static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
{
MpegTSContext *ts = filter->u.section_filter.opaque;
@ -1975,7 +2015,7 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
pes->st->id = pes->pid;
}
st = pes->st;
} else if (stream_type != 0x13) {
} else if (is_pes_stream(stream_type, prog_reg_desc)) {
if (ts->pids[pid])
mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
pes = add_pes_stream(ts, pid, pcr_pid);
@ -1995,6 +2035,10 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
goto out;
st->id = pid;
st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
if (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) {
mpegts_find_stream_type(st, stream_type, SCTE_types);
mpegts_open_section_filter(ts, pid, scte_data_cb, ts, 1);
}
}
}