Pass more detailed audio hardware configuration information to the renderer

media/audio/audio_util.h

 // 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.
 
 #ifndef MEDIA_AUDIO_AUDIO_UTIL_H_
 #define MEDIA_AUDIO_AUDIO_UTIL_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 33 matching lines @@
 
 // Returns the audio input hardware sample-rate for the specified device.
 MEDIA_EXPORT int GetAudioInputHardwareSampleRate(
     const std::string& device_id);
 
 // Returns the optimal low-latency buffer size for the audio hardware.
 // This is the smallest buffer size the system can comfortably render
 // at without glitches.  The buffer size is in sample-frames.
 MEDIA_EXPORT size_t GetAudioHardwareBufferSize();
 
+MEDIA_EXPORT int GetAudioHardwareOutputChannels();
+
 // Returns the channel layout for the specified audio input device.
 MEDIA_EXPORT ChannelLayout GetAudioInputHardwareChannelLayout(
     const std::string& device_id);
 
 // Computes a buffer size based on the given |sample_rate|. Must be used in
 // conjunction with AUDIO_PCM_LINEAR.
 MEDIA_EXPORT size_t GetHighLatencyOutputBufferSize(int sample_rate);
 
 #if defined(OS_WIN)
 
 // Returns number of buffers to be used by wave out.
 MEDIA_EXPORT int NumberOfWaveOutBuffers();
 
 #endif  // defined(OS_WIN)
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_AUDIO_UTIL_H_