Add speaker on/off control on Android for WebRTC

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"
@@ skipping 45 matching lines @@
 #endif
 #if defined(OS_MACOSX)
   // On Mac, use a UI loop to get native message pump so that CoreAudio property
   // listener callbacks fire.
   CHECK(audio_thread_->StartWithOptions(
       base::Thread::Options(MessageLoop::TYPE_UI, 0)));
 #else
   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() {
   // The platform specific AudioManager implementation must have already
   // stopped the audio thread. Otherwise, we may destroy audio streams before
   // stopping the thread, resulting an unexpected behavior.
   // This way we make sure activities of the audio streams are all stopped
   // before we destroy them.
   CHECK(!audio_thread_.get());
   // All the output streams should have been deleted.
@@ skipping 45 matching lines @@
       stream = FakeAudioOutputStream::MakeFakeStream(this, params);
       break;
     default:
       stream = NULL;
       break;
   }
 
   if (stream)
     ++num_output_streams_;
 
+#if defined(OS_ANDROID)
+  if (1 == num_output_streams_)
+    RegisterHeadsetReceiver();
+#endif
+
   return stream;
 }
 
 AudioInputStream* AudioManagerBase::MakeAudioInputStream(
     const AudioParameters& params, const std::string& device_id) {
   // TODO(miu): Fix ~20 call points across several unit test modules to call
   // this method on the audio thread, then uncomment the following:
   // DCHECK(message_loop_->BelongsToCurrentThread());
 
   if (!params.IsValid() || (params.channels() > kMaxInputChannels) ||
@@ skipping 22 matching lines @@
       break;
     default:
       stream = NULL;
       break;
   }
 
   if (stream)
     ++num_input_streams_;
 
 #if defined(OS_ANDROID)
-  if (num_input_streams_ == 1)
+  if (1 == num_input_streams_)
     SetAudioMode(kAudioModeInCommunication);
 #endif
 
   return stream;
 }
 
 AudioOutputStream* AudioManagerBase::MakeAudioOutputStreamProxy(
     const AudioParameters& params) {
 #if defined(OS_IOS)
   // IOS implements audio input only.
@@ skipping 65 matching lines @@
     media::AudioDeviceNames* device_names) {
 }
 
 void AudioManagerBase::ReleaseOutputStream(AudioOutputStream* stream) {
   DCHECK(stream);
   // TODO(xians) : Have a clearer destruction path for the AudioOutputStream.
   // For example, pass the ownership to AudioManager so it can delete the
   // streams.
   --num_output_streams_;
   delete stream;
+#if defined(OS_ANDROID)
+  if (!num_output_streams_)
+    UnRegisterHeadsetReceiver();
+#endif
 }
 
 void AudioManagerBase::ReleaseInputStream(AudioInputStream* stream) {
   DCHECK(stream);
   // TODO(xians) : Have a clearer destruction path for the AudioInputStream.
   --num_input_streams_;
   delete stream;
 #if defined(OS_ANDROID)
   if (!num_input_streams_)
     SetAudioMode(kAudioModeNormal);
@@ skipping 101 matching lines @@
 }
 
 #if defined(OS_ANDROID)
 void AudioManagerBase::SetAudioMode(int mode) {
   JNIEnv* env = base::android::AttachCurrentThread();
   jobject context = base::android::GetApplicationContext();
   DCHECK(context);
 
   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