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
10namespace media {
11
12enum 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|.
31MEDIA_EXPORT int SampleFormatToBytesPerChannel(SampleFormat sample_format);
32
33// Returns the name of the sample format as a string
34MEDIA_EXPORT const char* SampleFormatToString(SampleFormat sample_format);
35
36}  // namespace media
37
38#endif  // MEDIA_BASE_SAMPLE_FORMAT_H
39