Document that channels are stored contiguously in AudioBuffer

R=andrew@webrtc.org, kwiberg@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/20909004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6661 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/audio_processing/audio_buffer.h

@@ -56,6 +56,7 @@ class AudioBuffer {
   int samples_per_split_channel() const;
   int samples_per_keyboard_channel() const;
 
+  // It can be assumed that channels are stored contiguously.
   int16_t* data(int channel);
   const int16_t* data(int channel) const;
   int16_t* low_pass_split_data(int channel);