Use av_rescale_q() for converting FFmpeg timestamps to base::TimeDelta (second attempt).

media/filters/ffmpeg_demuxer_unittest.cc

Index: media/filters/ffmpeg_demuxer_unittest.cc
diff --git a/media/filters/ffmpeg_demuxer_unittest.cc b/media/filters/ffmpeg_demuxer_unittest.cc
index a882c585cfd31327c59ec812d78d1f906d529b01..f4c989a288b27c59ec111b99a31ca8149e55be89 100644
--- a/media/filters/ffmpeg_demuxer_unittest.cc
+++ b/media/filters/ffmpeg_demuxer_unittest.cc
@@ -134,6 +134,12 @@ int av_find_stream_info(AVFormatContext* format) {
   return g_av_find_stream_info;
 }
 
+int64 av_rescale_q(int64 a, AVRational bq, AVRational cq) {

[awong, 2009/05/20 18:17:42]

Hah...cute.  We do need a way to better mock these things. :-/

[scherkus (not reviewing), 2009/05/20 18:21:27]

You should see the actual implementation.  It's an explosion of shifts and bit
mask operators!!

This implementation will easily overflow hehe

+  int64 num = bq.num * cq.den;
+  int64 den = cq.num * bq.den;
+  return a * num / den;
+}
+
 void av_free(void* ptr) {
   if (ptr) {
     EXPECT_EQ(&g_format, ptr);