Another try at sorting out the thorny question of timing.

1 files changed, 39 insertions, 0 deletions

diff --git a/test/ffmpeg_pts_offset.cc b/test/ffmpeg_pts_offset.cc
new file mode 100644
index 000000000..15c2b38e1
--- /dev/null
+++ b/test/ffmpeg_pts_offset.cc
@@ -0,0 +1,39 @@
+/*
+    Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+BOOST_AUTO_TEST_CASE (ffmpeg_pts_offset_test)
+{
+	/* Sound == video so no offset required */
+	BOOST_CHECK_EQUAL (FFmpegDecoder::compute_pts_offset (0, 0, 24), 0);
+
+	/* Common offset should be removed */
+	BOOST_CHECK_CLOSE (FFmpegDecoder::compute_pts_offset (42, 42, 24), -42, 1e-9);
+
+	/* Video is on a frame boundary */
+	BOOST_CHECK_EQUAL (FFmpegDecoder::compute_pts_offset (1.0 / 24.0, 0, 24), 0);
+
+	/* Again, video is on a frame boundary */
+	BOOST_CHECK_EQUAL (FFmpegDecoder::compute_pts_offset (1.0 / 23.97, 0, 23.97), 0);
+
+	/* And again, video is on a frame boundary */
+	BOOST_CHECK_EQUAL (FFmpegDecoder::compute_pts_offset (3.0 / 23.97, 0, 23.97), 0);
+
+	/* Off a frame boundary */
+	BOOST_CHECK_CLOSE (FFmpegDecoder::compute_pts_offset (1.0 / 24.0 - 0.0215, 0, 24), 0.0215, 1e-9);
+}