src/media/base/sample_format.h

// Copyright 2013 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_BASE_SAMPLE_FORMAT_H
#define MEDIA_BASE_SAMPLE_FORMAT_H

#include "media/base/media_export.h"

namespace media {

enum SampleFormat {
  // These values are histogrammed over time; do not change their ordinal
  // values.  When deleting a sample format replace it with a dummy value; when
  // adding a sample format, do so at the bottom before kSampleFormatMax, and
  // update the value of kSampleFormatMax.
  kUnknownSampleFormat = 0,
  kSampleFormatU8,         // Unsigned 8-bit w/ bias of 128.
  kSampleFormatS16,        // Signed 16-bit.
  kSampleFormatS32,        // Signed 32-bit.
  kSampleFormatF32,        // Float 32-bit.
  kSampleFormatPlanarS16,  // Signed 16-bit planar.
  kSampleFormatPlanarF32,  // Float 32-bit planar.

  // Must always be equal to largest value ever logged.
  kSampleFormatMax = kSampleFormatPlanarF32,
};

// Returns the number of bytes used per channel for the specified
// |sample_format|.
MEDIA_EXPORT int SampleFormatToBytesPerChannel(SampleFormat sample_format);

// Returns the name of the sample format as a string
MEDIA_EXPORT const char* SampleFormatToString(SampleFormat sample_format);

}  // namespace media

#endif  // MEDIA_BASE_SAMPLE_FORMAT_H