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

media/filters/ffmpeg_demuxer_unittest.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <deque>
 
 #include "base/singleton.h"
 #include "base/tuple.h"
 #include "media/base/filter_host.h"
 #include "media/base/filters.h"
@@ skipping 116 matching lines @@
     *format = &g_format;
   }
   return g_av_open_input_file;
 }
 
 int av_find_stream_info(AVFormatContext* format) {
   EXPECT_EQ(&g_format, 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);
   }
 }
 
 int av_read_frame(AVFormatContext* format, AVPacket* packet) {
   EXPECT_EQ(&g_format, format);
   if (g_av_read_frame == 0) {
     PacketQueue::get()->Dequeue(packet);
@@ skipping 445 matching lines @@
   EXPECT_FALSE(reader->WaitForRead());
   EXPECT_FALSE(reader->called());
   EXPECT_FALSE(reader->buffer());
 
   // Manually release buffer, which should release any remaining AVPackets.
   reader = NULL;
   EXPECT_TRUE(PacketQueue::get()->WaitForOutstandingPackets(0));
 }
 
 }  // namespace