1 // Copyright 2013 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_BASE_SAMPLE_FORMAT_H 6 #define MEDIA_BASE_SAMPLE_FORMAT_H 7 8 #include "media/base/media_export.h" 9 10 namespace media { 11 12 enum SampleFormat { 13 // These values are histogrammed over time; do not change their ordinal 14 // values. When deleting a sample format replace it with a dummy value; when 15 // adding a sample format, do so at the bottom before kSampleFormatMax, and 16 // update the value of kSampleFormatMax. 17 kUnknownSampleFormat = 0, 18 kSampleFormatU8, // Unsigned 8-bit w/ bias of 128. 19 kSampleFormatS16, // Signed 16-bit. 20 kSampleFormatS32, // Signed 32-bit. 21 kSampleFormatF32, // Float 32-bit. 22 kSampleFormatPlanarS16, // Signed 16-bit planar. 23 kSampleFormatPlanarF32, // Float 32-bit planar. 24 25 // Must always be equal to largest value ever logged. 26 kSampleFormatMax = kSampleFormatPlanarF32, 27 }; 28 29 // Returns the number of bytes used per channel for the specified 30 // |sample_format|. 31 MEDIA_EXPORT int SampleFormatToBytesPerChannel(SampleFormat sample_format); 32 33 // Returns the name of the sample format as a string 34 MEDIA_EXPORT const char* SampleFormatToString(SampleFormat sample_format); 35 36 } // namespace media 37 38 #endif // MEDIA_BASE_SAMPLE_FORMAT_H 39