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 // Must always equal the largest value ever reported: 27 kAudioSampleRateMax = k192000Hz, 28 }; 29 30 // Helper method to convert integral values to their respective enum values, 31 // returns false for unexpected sample rates. 32 MEDIA_EXPORT bool ToAudioSampleRate(int sample_rate, AudioSampleRate* asr); 33 34 } // namespace media 35 36 #endif // MEDIA_AUDIO_SAMPLE_RATES_H_ 37
