Add speaker on/off control on Android for WebRTC

media/audio/audio_manager_base.cc

Index: media/audio/audio_manager_base.cc
===================================================================
--- media/audio/audio_manager_base.cc	(revision 189519)
+++ media/audio/audio_manager_base.cc	(working copy)
@@ -63,6 +63,13 @@
   CHECK(audio_thread_->Start());
 #endif
   message_loop_ = audio_thread_->message_loop_proxy();
+
+#if defined(OS_ANDROID)
+  JNIEnv* env = base::android::AttachCurrentThread();
+  jobject context = base::android::GetApplicationContext();
+  DCHECK(context);
+  j_am_.Reset(Java_AudioManagerAndroid_createAudioManagerAndroid(env, context));
+#endif
 }
 
 AudioManagerBase::~AudioManagerBase() {
@@ -128,6 +135,11 @@
   if (stream)
     ++num_output_streams_;
 
+#if defined(OS_ANDROID)
+  if (1 == num_output_streams_)
+    RegisterHeadsetReceiver();
+#endif
+
   return stream;
 }
 
@@ -170,7 +182,7 @@
     ++num_input_streams_;
 
 #if defined(OS_ANDROID)
-  if (num_input_streams_ == 1)
+  if (1 == num_input_streams_)
     SetAudioMode(kAudioModeInCommunication);
 #endif
 
@@ -256,6 +268,10 @@
   // streams.
   --num_output_streams_;
   delete stream;
+#if defined(OS_ANDROID)
+  if (!num_output_streams_)
+    UnRegisterHeadsetReceiver();
+#endif
 }
 
 void AudioManagerBase::ReleaseInputStream(AudioInputStream* stream) {
@@ -377,6 +393,22 @@
 
   Java_AudioManagerAndroid_setMode(env, context, mode);
 }
-#endif
 
+void AudioManagerBase::RegisterHeadsetReceiver() {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  jobject context = base::android::GetApplicationContext();
+  DCHECK(context);
+
+  Java_AudioManagerAndroid_registerHeadsetReceiver(env, j_am_.obj(), context);
+}
+
+void AudioManagerBase::UnRegisterHeadsetReceiver() {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  jobject context = base::android::GetApplicationContext();

[Yaron, 2013/03/21 16:51:31]

You don't use the context here. Remove it

[leozwang1, 2013/03/21 18:51:35]

Done.

+  DCHECK(context);
+
+  Java_AudioManagerAndroid_unregisterHeadsetReceiver(env, j_am_.obj());
+}
+#endif  // defined(OS_ANDROID)
+
 }  // namespace media