Improving support for Android Audio Effects in WebRTC

webrtc/modules/audio_device/android/java/src/org/webrtc/voiceengine/WebRtcAudioTrack.java

 /*
  *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 128 matching lines @@
     Logd("ctor" + WebRtcAudioUtils.getThreadInfo());
     this.context = context;
     this.nativeAudioTrack = nativeAudioTrack;
     audioManager = (AudioManager) context.getSystemService(
         Context.AUDIO_SERVICE);
     if (DEBUG) {
       WebRtcAudioUtils.logDeviceInfo(TAG);
     }
   }
 
-  private void InitPlayout(int sampleRate, int channels) {
-    Logd("InitPlayout(sampleRate=" + sampleRate + ", channels=" +
+  private void initPlayout(int sampleRate, int channels) {
+    Logd("initPlayout(sampleRate=" + sampleRate + ", channels=" +
          channels + ")");
     final int bytesPerFrame = channels * (BITS_PER_SAMPLE / 8);
     byteBuffer = byteBuffer.allocateDirect(
         bytesPerFrame * (sampleRate / BUFFERS_PER_SECOND));
     Logd("byteBuffer.capacity: " + byteBuffer.capacity());
     // Rather than passing the ByteBuffer with every callback (requiring
     // the potentially expensive GetDirectBufferAddress) we simply have the
     // the native class cache the address to the memory once.
     nativeCacheDirectBufferAddress(byteBuffer, nativeAudioTrack);
 
@@ skipping 24 matching lines @@
                                   AudioTrack.MODE_STREAM);
     } catch (IllegalArgumentException e) {
       Logd(e.getMessage());
       return;
     }
     assertTrue(audioTrack.getState() == AudioTrack.STATE_INITIALIZED);
     assertTrue(audioTrack.getPlayState() == AudioTrack.PLAYSTATE_STOPPED);
     assertTrue(audioTrack.getStreamType() == AudioManager.STREAM_VOICE_CALL);
   }
 
-  private boolean StartPlayout() {
-    Logd("StartPlayout");
+  private boolean startPlayout() {
+    Logd("startPlayout");
     assertTrue(audioTrack != null);
     assertTrue(audioThread == null);
     audioThread = new AudioTrackThread("AudioTrackJavaThread");
     audioThread.start();
     return true;
   }
 
-  private boolean StopPlayout() {
-    Logd("StopPlayout");
+  private boolean stopPlayout() {
+    Logd("stopPlayout");
     assertTrue(audioThread != null);
     audioThread.joinThread();
     audioThread = null;
     if (audioTrack != null) {
       audioTrack.release();
       audioTrack = null;
     }
     return true;
   }
 
   /** Get max possible volume index for a phone call audio stream. */
-  private int GetStreamMaxVolume() {
-    Logd("GetStreamMaxVolume");
+  private int getStreamMaxVolume() {
+    Logd("getStreamMaxVolume");
     assertTrue(audioManager != null);
     return audioManager.getStreamMaxVolume(AudioManager.STREAM_VOICE_CALL);
   }
 
   /** Set current volume level for a phone call audio stream. */
-  private boolean SetStreamVolume(int volume) {
-    Logd("SetStreamVolume(" + volume + ")");
+  private boolean setStreamVolume(int volume) {
+    Logd("setStreamVolume(" + volume + ")");
     assertTrue(audioManager != null);
     if (WebRtcAudioUtils.runningOnLollipopOrHigher()) {
       if (audioManager.isVolumeFixed()) {
         Loge("The device implements a fixed volume policy.");
         return false;
       }
     }
     audioManager.setStreamVolume(AudioManager.STREAM_VOICE_CALL, volume, 0);
     return true;
   }
 
   /** Get current volume level for a phone call audio stream. */
-  private int GetStreamVolume() {
-    Logd("GetStreamVolume");
+  private int getStreamVolume() {
+    Logd("getStreamVolume");
     assertTrue(audioManager != null);
     return audioManager.getStreamVolume(AudioManager.STREAM_VOICE_CALL);
   }
 
   /** Helper method which throws an exception  when an assertion has failed. */
   private static void assertTrue(boolean condition) {
     if (!condition) {
       throw new AssertionError("Expected condition to be true");
     }
   }
 
   private static void Logd(String msg) {
     Logging.d(TAG, msg);
   }
 
   private static void Loge(String msg) {
     Logging.e(TAG, msg);
   }
 
   private native void nativeCacheDirectBufferAddress(
       ByteBuffer byteBuffer, long nativeAudioRecord);
 
   private native void nativeGetPlayoutData(int bytes, long nativeAudioRecord);
 }