1 files changed, 16 insertions, 0 deletions
diff --git a/media/audio/audio_util.h b/media/audio/audio_util.h
index 0076b34..6067b21 100644
--- a/media/audio/audio_util.h
+++ b/media/audio/audio_util.h
@@ -39,6 +39,22 @@ MEDIA_EXPORT bool AdjustVolume(void* buf,
                                int bytes_per_sample,
                                float volume);
 
+// Returns the default audio output hardware sample-rate.
+MEDIA_EXPORT int GetAudioHardwareSampleRate();
+
+// 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();
+
+// 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);