Function mpegts_init

libavformat/mpegtsenc.c:1101–1315

}

static int mpegts_init(AVFormatContext *s)
{
    MpegTSWrite *ts = s->priv_data;
    AVDictionaryEntry *provider;
    const char *provider_name;
    int i, j;
    int ret;

    if (ts->m2ts_mode == -1) {
        if (av_match_ext(s->url, "m2ts")) {
            ts->m2ts_mode = 1;
        } else {
            ts->m2ts_mode = 0;
        }
    }

    ts->m2ts_video_pid   = M2TS_VIDEO_PID;
    ts->m2ts_audio_pid   = M2TS_AUDIO_START_PID;
    ts->m2ts_pgssub_pid  = M2TS_PGSSUB_START_PID;
    ts->m2ts_textsub_pid = M2TS_TEXTSUB_PID;

    if (ts->m2ts_mode) {
        ts->pmt_start_pid = M2TS_PMT_PID;
        if (s->nb_programs > 1) {
            av_log(s, AV_LOG_ERROR, "Only one program is allowed in m2ts mode!\n");
            return AVERROR(EINVAL);
        }
    }

    if (s->max_delay < 0) /* Not set by the caller */
        s->max_delay = 0;

    // round up to a whole number of TS packets
    ts->pes_payload_size = (ts->pes_payload_size + 14 + 183) / 184 * 184 - 14;

    ts->sdt.remaining    = SECTION_LENGTH - 3;

    if (!s->nb_programs) {
        /* allocate a single DVB service */
        if (!mpegts_add_service(s, ts->service_id, s->metadata, NULL))
            return AVERROR(ENOMEM);
    } else {
        for (i = 0; i < s->nb_programs; i++) {
            AVProgram *program = s->programs[i];
            if (!mpegts_add_service(s, program->id, program->metadata, program))
                return AVERROR(ENOMEM);
        }
    }

    ts->pat.pid          = PAT_PID;
    /* Initialize at 15 so that it wraps and is equal to 0 for the
     * first packet we write. */
    ts->pat.cc           = 15;
    ts->pat.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
    ts->pat.write_packet = section_write_packet;
    ts->pat.opaque       = s;

    ts->sdt.pid          = SDT_PID;