Get PulseAudio implementation working.

media/base/audio_bus.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_BASE_AUDIO_BUS_H_
 #define MEDIA_BASE_AUDIO_BUS_H_
 
 #include <vector>
 
 #include "base/memory/aligned_memory.h"
@@ skipping 44 matching lines @@
   static int CalculateMemorySize(int channels, int frames);
 
   // Helper methods for converting an AudioBus from and to interleaved integer
   // data.  Expects interleaving to be [ch0, ch1, ..., chN, ch0, ch1, ...] with
   // |bytes_per_sample| per value.  Values are scaled and bias corrected during
   // conversion.  ToInterleaved() will also clip values to format range.
   // Handles uint8, int16, and int32 currently.  FromInterleaved() will zero out
   // any unfilled frames when |frames| is less than frames().
   void FromInterleaved(const void* source, int frames, int bytes_per_sample);
   void ToInterleaved(int frames, int bytes_per_sample, void* dest) const;
+  void ToInterleavedPartial(int start_frame, int frames, int bytes_per_sample,
+                            void* dest) const;
 
   // Similar to FromInterleaved() above, but meant for streaming sources.  Does
   // not zero out remaining frames, the caller is responsible for doing so using
   // ZeroFramesPartial().  Frames are deinterleaved from the start of |source|
   // to channel(x)[start_frame].
   void FromInterleavedPartial(const void* source, int start_frame, int frames,
                               int bytes_per_sample);
 
   // Helper method for copying channel data from one AudioBus to another.  Both
   // AudioBus object must have the same frames() and channels().
@@ skipping 36 matching lines @@
 
   // Protect SetChannelData() and set_frames() for use by CreateWrapper().
   bool can_set_channel_data_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioBus);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_AUDIO_BUS_H_