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Bug 1231793: Part 2 - Added conversions to AudioSampleFormat.h. r=jya

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This commit is contained in:
Louis Christie 2016-02-12 14:40:13 +13:00
parent 0574df2777
commit 82110de2d4
1 changed files with 26 additions and 0 deletions
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26
dom/media/AudioSampleFormat.h
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@ -96,6 +96,19 @@ FloatToAudioSample<int16_t>(float aValue)
return int16_t(clamped);
}
template <typename T> T UInt8bitToAudioSample(uint8_t aValue);
template <> inline float
UInt8bitToAudioSample<float>(uint8_t aValue)
{
return aValue * (static_cast<float>(2) / UINT8_MAX) - static_cast<float>(1);
}
template <> inline int16_t
UInt8bitToAudioSample<int16_t>(uint8_t aValue)
{
return (int16_t(aValue) << 8) + aValue + INT16_MIN;
}
template <typename T> T IntegerToAudioSample(int16_t aValue);
template <> inline float
@ -109,6 +122,19 @@ IntegerToAudioSample<int16_t>(int16_t aValue)
return aValue;
}
template <typename T> T Int24bitToAudioSample(int32_t aValue);
template <> inline float
Int24bitToAudioSample<float>(int32_t aValue)
{
return aValue / static_cast<float>(1 << 23);
}
template <> inline int16_t
Int24bitToAudioSample<int16_t>(int32_t aValue)
{
return aValue / 256;
}
template<typename SrcT, typename DstT>
inline void
ConvertAudioSample(SrcT aIn, DstT& aOut);