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mpegts: add pcr filter for tracking standalone pcr pids 

Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint 2014-03-02 01:47:17 +01:00
parent 6bab55b84c
commit d83a5b5218
1 changed files with 16 additions and 5 deletions
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21
libavformat/mpegts.c
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@ -55,6 +55,7 @@
enum MpegTSFilterType {
MPEGTS_PES,
MPEGTS_SECTION,
MPEGTS_PCR,
};
typedef struct MpegTSFilter MpegTSFilter;
@ -467,6 +468,11 @@ static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
return filter;
}
static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
{
return mpegts_open_filter(ts, pid, MPEGTS_PCR);
}
static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
{
int pid;
@ -1824,6 +1830,9 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
p = desc_list_end;
}
if (!ts->pids[pcr_pid])
mpegts_open_pcr_filter(ts, pcr_pid);
out:
for (i = 0; i < mp4_descr_count; i++)
av_free(mp4_descr[i].dec_config_descr);
@ -2029,7 +2038,7 @@ static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
}
}
if (!has_payload)
if (!has_payload && tss->type != MPEGTS_PCR)
return 0;
p = packet + 4;
if (has_adaptation) {
@ -2038,7 +2047,7 @@ static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
}
/* if past the end of packet, ignore */
p_end = packet + TS_PACKET_SIZE;
if (p >= p_end)
if (p > p_end || (p == p_end && tss->type != MPEGTS_PCR))
return 0;
pos = avio_tell(ts->stream->pb);
@ -2096,9 +2105,11 @@ static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
tss->last_pcr = pcr_h * 300 + pcr_l;
// Note: The position here points actually behind the current packet.
if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
pos - ts->raw_packet_size)) < 0)
return ret;
if (tss->type == MPEGTS_PES) {
if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
pos - ts->raw_packet_size)) < 0)
return ret;
}
}
return 0;