Improves stereo/mono audio support on Android

webrtc/modules/audio_device/android/audio_manager.cc

 /*
  *  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 202 matching lines @@
 
 bool AudioManager::IsProAudioSupported() const {
   RTC_DCHECK(thread_checker_.CalledOnValidThread());
   ALOGD("IsProAudioSupported()");
   // TODO(henrika): return the state independently of if OpenSL ES is
   // blacklisted or not for now. We could use the same approach as in
   // IsLowLatencyPlayoutSupported() but I can't see the need for it yet.
   return pro_audio_;
 }
 
+bool AudioManager::IsStereoPlayoutSupported() const {
+  RTC_DCHECK(thread_checker_.CalledOnValidThread());
+  ALOGD("IsStereoPlayoutSupported()");
+  return (playout_parameters_.channels() == 2);
+}
+
+bool AudioManager::IsStereoRecordSupported() const {
+  RTC_DCHECK(thread_checker_.CalledOnValidThread());
+  ALOGD("IsStereoRecordSupported()");
+  return (record_parameters_.channels() == 2);
+}
+
 int AudioManager::GetDelayEstimateInMilliseconds() const {
   return delay_estimate_in_milliseconds_;
 }
 
 void JNICALL AudioManager::CacheAudioParameters(JNIEnv* env,
                                                 jobject obj,
                                                 jint sample_rate,
                                                 jint output_channels,
                                                 jint input_channels,
                                                 jboolean hardware_aec,
@@ skipping 56 matching lines @@
   return playout_parameters_;
 }
 
 const AudioParameters& AudioManager::GetRecordAudioParameters() {
   RTC_CHECK(record_parameters_.is_valid());
   RTC_DCHECK(thread_checker_.CalledOnValidThread());
   return record_parameters_;
 }
 
 }  // namespace webrtc