media/audio/audio_util.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef MEDIA_AUDIO_AUDIO_UTIL_H_
   6 #define MEDIA_AUDIO_AUDIO_UTIL_H_
   7
   8 #include "base/basictypes.h"
   9 #include "build/build_config.h"
  10 #include "media/base/media_export.h"
  11
  12 namespace media {
  13
  14 // Returns user buffer size as specified on the command line or 0 if no buffer
  15 // size has been specified.
  16 MEDIA_EXPORT int GetUserBufferSize();
  17
  18 // Computes a buffer size based on the given |sample_rate|. Must be used in
  19 // conjunction with AUDIO_PCM_LINEAR.
  20 MEDIA_EXPORT size_t GetHighLatencyOutputBufferSize(int sample_rate);
  21
  22 #if defined(OS_WIN)
  23
  24 // Returns number of buffers to be used by wave out.
  25 MEDIA_EXPORT int NumberOfWaveOutBuffers();
  26
  27 #endif  // defined(OS_WIN)
  28
  29 }  // namespace media
  30
  31 #endif  // MEDIA_AUDIO_AUDIO_UTIL_H_