From 4b365b08685b0ab9df3f4bae4ee8b6506eb637ea Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Cl=C3=A9ment=20B=C5=93sch?= Date: Fri, 3 Aug 2012 15:40:15 +0200 Subject: lavu/timecode: add av_timecode_check_frame_rate(). --- libavutil/timecode.c | 26 ++++++++++++++++++-------- 1 file changed, 18 insertions(+), 8 deletions(-) (limited to 'libavutil/timecode.c') diff --git a/libavutil/timecode.c b/libavutil/timecode.c index c74abf2bd0..fcbd00d660 100644 --- a/libavutil/timecode.c +++ b/libavutil/timecode.c @@ -146,6 +146,17 @@ char *av_timecode_make_mpeg_tc_string(char *buf, uint32_t tc25bit) return buf; } +static int check_fps(int fps) +{ + int i; + static const int supported_fps[] = {24, 25, 30, 50, 60}; + + for (i = 0; i < FF_ARRAY_ELEMS(supported_fps); i++) + if (fps == supported_fps[i]) + return 0; + return -1; +} + static int check_timecode(void *log_ctx, AVTimecode *tc) { if (tc->fps <= 0) { @@ -156,18 +167,12 @@ static int check_timecode(void *log_ctx, AVTimecode *tc) av_log(log_ctx, AV_LOG_ERROR, "Drop frame is only allowed with 30000/1001 FPS\n"); return AVERROR(EINVAL); } - switch (tc->fps) { - case 24: - case 25: - case 30: - case 50: - case 60: return 0; - - default: + if (check_fps(tc->fps) < 0) { av_log(log_ctx, AV_LOG_ERROR, "Timecode frame rate %d/%d not supported\n", tc->rate.num, tc->rate.den); return AVERROR_PATCHWELCOME; } + return 0; } static int fps_from_frame_rate(AVRational rate) @@ -177,6 +182,11 @@ static int fps_from_frame_rate(AVRational rate) return (rate.num + rate.den/2) / rate.den; } +int av_timecode_check_frame_rate(AVRational rate) +{ + return check_fps(fps_from_frame_rate(rate)); +} + int av_timecode_init(AVTimecode *tc, AVRational rate, int flags, int frame_start, void *log_ctx) { memset(tc, 0, sizeof(*tc)); -- cgit v1.2.3