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// Copyright 2013 The Chromium Authors
// 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 {
// Sample formats.
//
// These values are persisted to logs. Entries should not be renumbered and
// numeric values should never be reused.
//
// LINT.IfChange(SampleFormat)
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 = 1, // Unsigned 8-bit w/ bias of 128.
kSampleFormatS16 = 2, // Signed 16-bit.
kSampleFormatS32 = 3, // Signed 32-bit.
kSampleFormatF32 = 4, // Float 32-bit.
kSampleFormatPlanarS16 = 5, // Signed 16-bit planar.
kSampleFormatPlanarF32 = 6, // Float 32-bit planar.
kSampleFormatPlanarS32 = 7, // Signed 32-bit planar.
kSampleFormatS24 = 8, // Signed 24-bit.
kSampleFormatAc3 = 9, // Compressed AC3 bitstream.
kSampleFormatEac3 = 10, // Compressed E-AC3 bitstream.
kSampleFormatMpegHAudio = 11, // Compressed MPEG-H audio bitstream.
kSampleFormatPlanarU8 = 12, // Unsigned 8-bit w/ bias of 128 planar.
kSampleFormatDts = 13, // Compressed DTS audio bitstream.
kSampleFormatDtsxP2 = 14, // Compressed DTSX audio bitstream.
kSampleFormatIECDts = 15, // IEC-61937 encapsulated DTS audio bitstream.
kSampleFormatDtse = 16, // Compressed DTS Express audio bitstream.
// Must always be equal to largest value ever logged.
kMaxValue = kSampleFormatDtse,
};
// LINT.ThenChange(//tools/metrics/histograms/enums.xml:SampleFormat)
// Returns the number of bytes used per channel for the specified
// |sample_format|.
MEDIA_EXPORT int SampleFormatToBytesPerChannel(SampleFormat sample_format);
MEDIA_EXPORT int SampleFormatToBitsPerChannel(SampleFormat sample_format);
// Returns the name of the sample format as a string
MEDIA_EXPORT const char* SampleFormatToString(SampleFormat sample_format);
// Returns true if |sample_format| is planar, false otherwise.
MEDIA_EXPORT bool IsPlanar(SampleFormat sample_format);
// Returns true if |sample_format| is interleaved, false otherwise.
MEDIA_EXPORT bool IsInterleaved(SampleFormat sample_format);
// Returns true if |sample_format| is compressed bitstream, false otherwise.
MEDIA_EXPORT bool IsBitstream(SampleFormat sample_format);
} // namespace media
#endif // MEDIA_BASE_SAMPLE_FORMAT_H_
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