diff --git a/libavformat/mpegts.c b/libavformat/mpegts.c index ae9d1f4e93..8f61f1727d 100644 --- a/libavformat/mpegts.c +++ b/libavformat/mpegts.c @@ -73,6 +73,7 @@ typedef void SetServiceCallback (void *opaque, int ret); typedef struct MpegTSSectionFilter { int section_index; int section_h_size; + int last_ver; uint8_t *section_buf; unsigned int check_crc : 1; unsigned int end_of_section_reached : 1; @@ -372,6 +373,8 @@ static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts, sec->opaque = opaque; sec->section_buf = av_malloc(MAX_SECTION_SIZE); sec->check_crc = check_crc; + sec->last_ver = -1; + if (!sec->section_buf) { av_free(filter); return NULL; @@ -1255,6 +1258,7 @@ static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section, int section_len) { MpegTSContext *ts = filter->u.section_filter.opaque; + MpegTSSectionFilter *tssf = &filter->u.section_filter; SectionHeader h; const uint8_t *p, *p_end; AVIOContext pb; @@ -1269,6 +1273,9 @@ static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section, return; if (h.tid != M4OD_TID) return; + if (h.version == tssf->last_ver) + return; + tssf->last_ver = h.version; mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count, MAX_MP4_DESCR_COUNT); @@ -1507,6 +1514,7 @@ int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len) { MpegTSContext *ts = filter->u.section_filter.opaque; + MpegTSSectionFilter *tssf = &filter->u.section_filter; SectionHeader h1, *h = &h1; PESContext *pes; AVStream *st; @@ -1526,6 +1534,9 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len p = section; if (parse_section_header(h, &p, p_end) < 0) return; + if (h->version == tssf->last_ver) + return; + tssf->last_ver = h->version; av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d\n", h->id, h->sec_num, h->last_sec_num); @@ -1657,6 +1668,7 @@ out: static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len) { MpegTSContext *ts = filter->u.section_filter.opaque; + MpegTSSectionFilter *tssf = &filter->u.section_filter; SectionHeader h1, *h = &h1; const uint8_t *p, *p_end; int sid, pmt_pid; @@ -1670,6 +1682,9 @@ static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len return; if (h->tid != PAT_TID) return; + if (h->version == tssf->last_ver) + return; + tssf->last_ver = h->version; clear_programs(ts); for (;;) { @@ -1700,6 +1715,7 @@ static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len) { MpegTSContext *ts = filter->u.section_filter.opaque; + MpegTSSectionFilter *tssf = &filter->u.section_filter; SectionHeader h1, *h = &h1; const uint8_t *p, *p_end, *desc_list_end, *desc_end; int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type; @@ -1714,6 +1730,10 @@ static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len return; if (h->tid != SDT_TID) return; + if (h->version == tssf->last_ver) + return; + tssf->last_ver = h->version; + onid = get16(&p, p_end); if (onid < 0) return;