support adaptive playback in MSE

media/base/android/media_codec_bridge.h

 // Copyright (c) 2013 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_BRIDGE_H_
 #define MEDIA_BASE_ANDROID_MEDIA_CODEC_BRIDGE_H_
 
 #include <jni.h>
 #include <string>
 
@@ skipping 245 matching lines @@
       const VideoCodec& codec,  // e.g. media::kCodecVP8
       const gfx::Size& size,    // input frame size
       int bit_rate,             // bits/second
       int frame_rate,           // frames/second
       int i_frame_interval,     // count
       int color_format);        // MediaCodecInfo.CodecCapabilities.
 
   void SetVideoBitrate(int bps);
   void RequestKeyFrameSoon();
 
+  // Returns whether adaptive playback is supported for this object given
+  // the new size.
+  bool IsAdaptivePlaybackSupported(int width, int height);
+
+  // Test-only method to set the return value of IsAdaptivePlaybackSupported().
+  // Without this function, the return value of that function will be device
+  // dependent. If |adaptive_playback_supported| is equal to 0, the return value
+  // will be false. If |adaptive_playback_supported| is larger than 0, the
+  // return value will be true.
+  void set_adaptive_playback_supported_for_testing(
+      int adaptive_playback_supported) {
+    adaptive_playback_supported_for_testing_ = adaptive_playback_supported;
+  }
+
  private:
   VideoCodecBridge(const std::string& mime,
                    bool is_secure,
                    MediaCodecDirection direction);
+
+  int adaptive_playback_supported_for_testing_;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_ANDROID_MEDIA_CODEC_BRIDGE_H_