From 6b62e9c77b2a45fd1d7084626f2bb2949e832e5f Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Wed, 26 Aug 2015 20:27:45 +0100
Subject: Separate FFmpegSubtitlePeriod.

---
 src/lib/ffmpeg.cc | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'src/lib/ffmpeg.cc')

diff --git a/src/lib/ffmpeg.cc b/src/lib/ffmpeg.cc
index 1620b32b4..bba642484 100644
--- a/src/lib/ffmpeg.cc
+++ b/src/lib/ffmpeg.cc
@@ -246,3 +246,19 @@ FFmpeg::avio_seek (int64_t const pos, int whence)
 
 	return _file_group.seek (pos, whence);
 }
+
+FFmpegSubtitlePeriod
+FFmpeg::subtitle_period (AVSubtitle const & sub)
+{
+	ContentTime const packet_time = ContentTime::from_seconds (static_cast<double> (sub.pts) / AV_TIME_BASE);
+
+	if (sub.end_display_time == static_cast<uint32_t> (-1)) {
+		/* End time is not known */
+		return FFmpegSubtitlePeriod (packet_time + ContentTime::from_seconds (sub.start_display_time / 1e3));
+	}
+
+	return FFmpegSubtitlePeriod (
+		packet_time + ContentTime::from_seconds (sub.start_display_time / 1e3),
+		packet_time + ContentTime::from_seconds (sub.end_display_time / 1e3)
+		);
+}
-- 
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