media/audio/sample_rates.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_SAMPLE_RATES_H_
   6 #define MEDIA_AUDIO_SAMPLE_RATES_H_
   7
   8 #include "media/base/media_export.h"
   9
  10 namespace media {
  11
  12 // Enumeration used for histogramming sample rates into distinct buckets.
  13 // Logged to UMA, so never reuse a value, always add new/greater ones!
  14 enum AudioSampleRate {
  15   k8000Hz = 0,
  16   k16000Hz = 1,
  17   k32000Hz = 2,
  18   k48000Hz = 3,
  19   k96000Hz = 4,
  20   k11025Hz = 5,
  21   k22050Hz = 6,
  22   k44100Hz = 7,
  23   k88200Hz = 8,
  24   k176400Hz = 9,
  25   k192000Hz = 10,
  26   kUnexpectedAudioSampleRate  // Must always be last!
  27 };
  28
  29 // Helper method to convert integral values to their respective enum values,
  30 // or kUnexpectedAudioSampleRate if no match exists.
  31 MEDIA_EXPORT AudioSampleRate AsAudioSampleRate(int sample_rate);
  32
  33 }  // namespace media
  34
  35 #endif  // MEDIA_AUDIO_SAMPLE_RATES_H_