Use passthrough decoder for (E)AC3 formats

media/base/android/media_codec_util.h

 // Copyright 2015 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_BASE_ANDROID_MEDIA_CODEC_UTIL_H_
 #define MEDIA_BASE_ANDROID_MEDIA_CODEC_UTIL_H_
 
 #include <jni.h>
 #include <set>
 #include <string>
@@ skipping 66 matching lines @@
 
   // Indicates if the h264 encoder is available on this device.
   static bool IsH264EncoderAvailable();
 
   // Indicates if SurfaceView and MediaCodec work well together on this device.
   static bool IsSurfaceViewOutputSupported();
 
   // Indicates if MediaCodec.setOutputSurface() works on this device.
   static bool IsSetOutputSurfaceSupported();
 
+  // Return true if the compressed audio |codec| will pass through the media
+  // pipelines without decompression.
+  static bool IsPassthroughAudioFormat(AudioCodec codec);
+
   // Indicates if the decoder is known to fail when flushed. (b/8125974,
   // b/8347958)
   // When true, the client should work around the issue by releasing the
   // decoder and instantiating a new one rather than flushing the current one.
   static bool CodecNeedsFlushWorkaround(MediaCodecBridge* codec);
 
  private:
   static bool CanDecodeInternal(const std::string& mime, bool is_secure);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_ANDROID_MEDIA_CODEC_UTIL_H_