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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.
#include "media/base/sample_format.h"
#include <ostream>
#include "base/notreached.h"
namespace media {
int SampleFormatToBytesPerChannel(SampleFormat sample_format) {
switch (sample_format) {
case kUnknownSampleFormat:
return 0;
case kSampleFormatU8:
case kSampleFormatPlanarU8:
case kSampleFormatAc3:
case kSampleFormatEac3:
case kSampleFormatMpegHAudio:
case kSampleFormatDts:
case kSampleFormatDtsxP2:
case kSampleFormatDtse:
return 1;
case kSampleFormatS16:
case kSampleFormatPlanarS16:
return 2;
case kSampleFormatS24:
case kSampleFormatS32:
case kSampleFormatF32:
case kSampleFormatPlanarF32:
case kSampleFormatPlanarS32:
case kSampleFormatIECDts:
return 4;
}
NOTREACHED() << "Invalid sample format provided: " << sample_format;
}
int SampleFormatToBitsPerChannel(SampleFormat sample_format) {
return SampleFormatToBytesPerChannel(sample_format) * 8;
}
const char* SampleFormatToString(SampleFormat sample_format) {
switch(sample_format) {
case kUnknownSampleFormat:
return "Unknown sample format";
case kSampleFormatU8:
return "Unsigned 8-bit with bias of 128";
case kSampleFormatS16:
return "Signed 16-bit";
case kSampleFormatS24:
return "Signed 24-bit";
case kSampleFormatS32:
return "Signed 32-bit";
case kSampleFormatF32:
return "Float 32-bit";
case kSampleFormatPlanarU8:
return "Unsigned 8-bit with bias of 128 planar";
case kSampleFormatPlanarS16:
return "Signed 16-bit planar";
case kSampleFormatPlanarF32:
return "Float 32-bit planar";
case kSampleFormatPlanarS32:
return "Signed 32-bit planar";
case kSampleFormatAc3:
return "Compressed AC3 bitstream";
case kSampleFormatEac3:
return "Compressed E-AC3 bitstream";
case kSampleFormatMpegHAudio:
return "Compressed MPEG-H audio bitstream";
case kSampleFormatDts:
return "Compressed DTS bitstream";
case kSampleFormatDtsxP2:
return "Compressed DTSXP2 bitstream";
case kSampleFormatIECDts:
return "IEC-61937 encapsulated DTS bitstream";
case kSampleFormatDtse:
return "Compressed DTS Express bitstream";
}
NOTREACHED() << "Invalid sample format provided: " << sample_format;
}
bool IsPlanar(SampleFormat sample_format) {
switch (sample_format) {
case kSampleFormatPlanarU8:
case kSampleFormatPlanarS16:
case kSampleFormatPlanarF32:
case kSampleFormatPlanarS32:
return true;
case kUnknownSampleFormat:
case kSampleFormatU8:
case kSampleFormatS16:
case kSampleFormatS24:
case kSampleFormatS32:
case kSampleFormatF32:
case kSampleFormatAc3:
case kSampleFormatEac3:
case kSampleFormatMpegHAudio:
case kSampleFormatDts:
case kSampleFormatDtsxP2:
case kSampleFormatIECDts:
case kSampleFormatDtse:
return false;
}
NOTREACHED() << "Invalid sample format provided: " << sample_format;
}
bool IsInterleaved(SampleFormat sample_format) {
switch (sample_format) {
case kSampleFormatU8:
case kSampleFormatS16:
case kSampleFormatS24:
case kSampleFormatS32:
case kSampleFormatF32:
case kSampleFormatAc3:
case kSampleFormatEac3:
case kSampleFormatMpegHAudio:
case kSampleFormatDts:
case kSampleFormatDtsxP2:
case kSampleFormatIECDts:
case kSampleFormatDtse:
return true;
case kUnknownSampleFormat:
case kSampleFormatPlanarU8:
case kSampleFormatPlanarS16:
case kSampleFormatPlanarF32:
case kSampleFormatPlanarS32:
return false;
}
NOTREACHED() << "Invalid sample format provided: " << sample_format;
}
bool IsBitstream(SampleFormat sample_format) {
switch (sample_format) {
case kSampleFormatAc3:
case kSampleFormatEac3:
case kSampleFormatMpegHAudio:
case kSampleFormatDts:
case kSampleFormatDtsxP2:
case kSampleFormatIECDts:
// If on-device decoding is required, the sample format will be
// kSampleFormatS16, so it will return false. If bit-stream passthrough
// is required, the sample format would already be
// kSampleFormatDts/DtsxP2. In this case, it should return true as below.
return true;
case kUnknownSampleFormat:
case kSampleFormatU8:
case kSampleFormatS16:
case kSampleFormatS24:
case kSampleFormatS32:
case kSampleFormatF32:
case kSampleFormatPlanarU8:
case kSampleFormatPlanarS16:
case kSampleFormatPlanarF32:
case kSampleFormatPlanarS32:
case kSampleFormatDtse:
return false;
}
NOTREACHED() << "Invalid sample format provided: " << sample_format;
}
} // namespace media
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