Implement ISO BMFF support in Media Source (try 2).

media/mp4/avc.h

Index: media/mp4/avc.h
diff --git a/media/mp4/avc.h b/media/mp4/avc.h
new file mode 100644
index 0000000000000000000000000000000000000000..2767c145b855fed9ab67587b37d11b48d8022001
--- /dev/null
+++ b/media/mp4/avc.h
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 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.
+
+#ifndef MEDIA_MP4_AVC_H_
+#define MEDIA_MP4_AVC_H_
+
+#include <vector>
+
+#include "base/basictypes.h"
+#include "media/base/channel_layout.h"
+#include "media/base/media_export.h"
+
+namespace media {
+namespace mp4 {
+
+struct AVCDecoderConfigurationRecord;
+
+class MEDIA_EXPORT AVC {
+ public:
+  static bool ConvertToAnnexB(int length_size, std::vector<uint8>* buffer);
+
+  static bool InsertParameterSets(
+      const AVCDecoderConfigurationRecord& avc_config,
+      std::vector<uint8>* buffer);
+
+  static ChannelLayout ConvertAACChannelCountToChannelLayout(int count);
+};
+
+
+}  // namespace mp4
+}  // namespace media
+
+#endif  // MEDIA_MP4_AVC_H_