Set default sampling rate to 44100 and query the native output sampling rate.

media/audio/audio_manager_base.cc

 // 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.
 
 #include "media/audio/audio_manager_base.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/message_loop_proxy.h"
 #include "base/threading/thread.h"
-#if defined(OS_ANDROID)
-#include "jni/AudioManagerAndroid_jni.h"
-#endif
 #include "media/audio/audio_output_dispatcher_impl.h"
 #include "media/audio/audio_output_proxy.h"
 #include "media/audio/audio_output_resampler.h"
 #include "media/audio/audio_util.h"
 #include "media/audio/fake_audio_input_stream.h"
 #include "media/audio/fake_audio_output_stream.h"
 #include "media/base/media_switches.h"
 
+#if defined(OS_ANDROID)
+#include "jni/AudioManagerAndroid_jni.h"
+#endif
+
 namespace media {
 
 static const int kStreamCloseDelaySeconds = 5;
 
 // Default maximum number of output streams that can be open simultaneously
 // for all platforms.
 static const int kDefaultMaxOutputStreams = 16;
 
 // Default maximum number of input streams that can be open simultaneously
 // for all platforms.
@@ skipping 346 matching lines @@
   return GetPreferredOutputStreamParameters(AudioParameters());
 }
 
 AudioParameters AudioManagerBase::GetInputStreamParameters(
     const std::string& device_id) {
   NOTREACHED();
   return AudioParameters();
 }
 
 #if defined(OS_ANDROID)
+int AudioManagerBase::GetNativeOutputSampleRatee() {

[DaleCurtis, 2013/04/15 18:13:06]

It makes me sad that this needs to be done here :(

How hard would it be to move all of the android stuff into AudioManagerAndroid?

One way would be for ReleaseOutputStream() and ReleaseInputStream() to return a
bool of true or false if there are any streams left.

Then AudioManagerAndroid just needs to override these methods and check the
return values to handle the android specific bits.  Doing this allows you to
keep all the android stuff in Android.

+  return Java_AudioManagerAndroid_getNativeOutputSampleRate(
+      base::android::AttachCurrentThread(),
+      j_audio_manager_.obj());
+}
+
 void AudioManagerBase::SetAudioMode(int mode) {
   Java_AudioManagerAndroid_setMode(
       base::android::AttachCurrentThread(),
       j_audio_manager_.obj(), mode);
 }
 
 void AudioManagerBase::RegisterHeadsetReceiver() {
   Java_AudioManagerAndroid_registerHeadsetReceiver(
       base::android::AttachCurrentThread(),
       j_audio_manager_.obj());
 }
 
 void AudioManagerBase::UnregisterHeadsetReceiver() {
   Java_AudioManagerAndroid_unregisterHeadsetReceiver(
       base::android::AttachCurrentThread(),
       j_audio_manager_.obj());
 }
 #endif  // defined(OS_ANDROID)
 
 }  // namespace media