Upgrade AudioBus to support wrapping, interleaving.

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 62 matching lines @@
 // puts it in the floating point |destination|.
 // It returns |true| on success, or |false| if the |sample_fmt| is
 // not recognized.
 MEDIA_EXPORT bool DeinterleaveAudioChannel(void* source,
                                            float* destination,
                                            int channels,
                                            int channel_index,
                                            int bytes_per_sample,
                                            size_t number_of_frames);
 
-// InterleaveFloatToInt scales, clips, and interleaves the planar
-// floating-point audio contained in |source| to the |destination|.
-// The floating-point data is in a canonical range of -1.0 -> +1.0.
-// The size of the |source| vector determines the number of channels.
-// The |destination| buffer is assumed to be large enough to hold the
-// result. Thus it must be at least size: number_of_frames * source.size()
-MEDIA_EXPORT void InterleaveFloatToInt(const AudioBus* audio_bus,
-                                       void* destination,
-                                       size_t number_of_frames,
-                                       int bytes_per_sample);
-
 // 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.
@@ skipping 29 matching lines @@
 MEDIA_EXPORT bool IsWASAPISupported();
 
 // 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_