Function av_timecode_init_from_components

libavutil/timecode.c:211–239

}

int av_timecode_init_from_components(AVTimecode *tc, AVRational rate, int flags, int hh, int mm, int ss, int ff, void *log_ctx)
{
    int ret;
    int64_t s;

    memset(tc, 0, sizeof(*tc));
    tc->flags = flags;
    tc->rate  = rate;
    tc->fps   = fps_from_frame_rate(rate);

    ret = check_timecode(log_ctx, tc);
    if (ret < 0)
        return ret;

    s = hh*3600LL + mm*60LL + ss;
    if (s != (int32_t)s)
        return AVERROR(EINVAL);

    s = s * tc->fps + ff;
    if (s != (int32_t)s)
        return AVERROR(EINVAL);
    tc->start = s;

    if (tc->flags & AV_TIMECODE_FLAG_DROPFRAME) { /* adjust frame number */
        int tmins = 60*hh + mm;
        tc->start -= (tc->fps / 30 * 2) * (tmins - tmins/10);
    }
    return 0;
}

int av_timecode_init_from_string(AVTimecode *tc, AVRational rate, const char *str, void *log_ctx)
{