Merge 123292 - Increase the buffer size in AudioRendererImpl to fix muted playback rate

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 <vector>
 
 #include "base/basictypes.h"
 #include "media/base/media_export.h"
 
+struct AudioParameters;
+
 namespace base {
 class SharedMemory;
 }
 
 namespace media {
 
 // For all audio functions 3 audio formats are supported:
 // 8 bits unsigned 0 to 255.
 // 16 bit signed (little endian).
 // 32 bit signed (little endian)
@@ skipping 92 matching lines @@
 MEDIA_EXPORT bool IsWASAPISupported();
 
 #endif  // defined(OS_WIN)
 
 // Crossfades |bytes_to_crossfade| bytes of data in |dest| with the
 // data in |src|. Assumes there is room in |dest| and enough data in |src|.
 MEDIA_EXPORT void Crossfade(int bytes_to_crossfade, int number_of_channels,
                             int bytes_per_channel, const uint8* src,
                             uint8* dest);
 
+// Calculates a safe hardware buffer size (in number of samples) given a set
+// of audio parameters.
+MEDIA_EXPORT uint32 SelectSamplesPerPacket(int sample_rate);
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_AUDIO_UTIL_H_