Refactor some code that depends on FFmpeg

media/filters/ffmpeg_audio_decoder.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.
+// Copyright (c) 2010 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 "media/filters/ffmpeg_audio_decoder.h"
 
 #include "media/base/callback.h"
 #include "media/base/data_buffer.h"
 #include "media/base/limits.h"
-#include "media/filters/ffmpeg_common.h"
+#include "media/ffmpeg/ffmpeg_common.h"
 #include "media/filters/ffmpeg_demuxer.h"
 
 namespace media {
 
 // Size of the decoded audio buffer.
 const size_t FFmpegAudioDecoder::kOutputBufferSize =
     AVCODEC_MAX_AUDIO_FRAME_SIZE;
 
 FFmpegAudioDecoder::FFmpegAudioDecoder()
     : codec_context_(NULL) {
@@ skipping 171 matching lines @@
 base::TimeDelta FFmpegAudioDecoder::CalculateDuration(size_t size) {
   int64 denominator = codec_context_->channels *
       av_get_bits_per_sample_format(codec_context_->sample_fmt) / 8 *
       codec_context_->sample_rate;
   double microseconds = size /
       (denominator / static_cast<double>(base::Time::kMicrosecondsPerSecond));
   return base::TimeDelta::FromMicroseconds(static_cast<int64>(microseconds));
 }
 
 }  // namespace