| // 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_shmem_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. |
| kSampleFormatPlanarS32, // Signed 32-bit planar. |
| kSampleFormatS24, // Signed 24-bit. |
| kSampleFormatAc3, // Compressed AC3 bitstream. |
| kSampleFormatEac3, // Compressed E-AC3 bitstream. |
| kSampleFormatMpegHAudio, // Compressed MPEG-H audio bitstream. |
| kSampleFormatPlanarU8, // Unsigned 8-bit w/ bias of 128 planar. |
| |
| // Must always be equal to largest value ever logged. |
| kSampleFormatMax = kSampleFormatMpegHAudio, |
| }; |
| |
| // Returns the number of bytes used per channel for the specified |
| // |sample_format|. |
| MEDIA_SHMEM_EXPORT int SampleFormatToBytesPerChannel( |
| SampleFormat sample_format); |
| MEDIA_SHMEM_EXPORT int SampleFormatToBitsPerChannel(SampleFormat sample_format); |
| |
| // Returns the name of the sample format as a string |
| MEDIA_SHMEM_EXPORT const char* SampleFormatToString(SampleFormat sample_format); |
| |
| // Returns true if |sample_format| is planar, false otherwise. |
| MEDIA_SHMEM_EXPORT bool IsPlanar(SampleFormat sample_format); |
| |
| // Returns true if |sample_format| is interleaved, false otherwise. |
| MEDIA_SHMEM_EXPORT bool IsInterleaved(SampleFormat sample_format); |
| |
| // Returns true if |sample_format| is compressed bitstream, false otherwise. |
| MEDIA_SHMEM_EXPORT bool IsBitstream(SampleFormat sample_format); |
| |
| } // namespace media |
| |
| #endif // MEDIA_BASE_SAMPLE_FORMAT_H_ |