AxioDL/boo
2
0
Fork 0
mirror of https://github.com/AxioDL/boo.git synced 2025-12-13 23:26:16 +00:00
Code Issues Packages Projects Releases Wiki Activity

Initial audio interface classes

Browse Source
This commit is contained in:
Jack Andersen
2016-01-28 13:53:51 -10:00
parent be37b22dd5
commit 43376ff416
8 changed files with 397 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

73
lib/audiodev/AudioMatrix.cpp Normal file
View File

@@ -0,0 +1,73 @@
#include "boo/audiodev/AudioMatrix.hpp"
#include <string.h>
namespace boo
{
void AudioMatrixMono::setDefaultMatrixCoefficients()
{
memset(m_coefs, 0, sizeof(m_coefs));
switch (m_setOut)
{
case AudioChannelSet::Mono:
case AudioChannelSet::Stereo:
case AudioChannelSet::Quad:
m_coefs[AudioChannel::FrontLeft] = 1.0;
m_coefs[AudioChannel::FrontRight] = 1.0;
break;
case AudioChannelSet::Surround51:
case AudioChannelSet::Surround71:
m_coefs[AudioChannel::FrontCenter] = 1.0;
break;
}
}
void AudioMatrixMono::bufferMonoSampleData(IAudioVoice& voice, const int16_t* data, size_t samples)
{
const ChannelMap& chmap = voice.channelMap();
m_interleaveBuf.clear();
m_interleaveBuf.reserve(samples * chmap.m_channelCount);
for (size_t s=0 ; s<samples ; ++s, ++data)
for (int c=0 ; c<chmap.m_channelCount ; ++c)
m_interleaveBuf.push_back(data[0] * m_coefs[chmap.m_channels[c]]);
voice.bufferSampleData(m_interleaveBuf.data(), samples);
}
void AudioMatrixStereo::setDefaultMatrixCoefficients()
{
memset(m_coefs, 0, sizeof(m_coefs));
switch (m_setOut)
{
case AudioChannelSet::Mono:
m_coefs[AudioChannel::FrontLeft][0] = 0.5;
m_coefs[AudioChannel::FrontLeft][1] = 0.5;
m_coefs[AudioChannel::FrontRight][0] = 0.5;
m_coefs[AudioChannel::FrontRight][1] = 0.5;
break;
case AudioChannelSet::Stereo:
case AudioChannelSet::Quad:
m_coefs[AudioChannel::FrontLeft][0] = 1.0;
m_coefs[AudioChannel::FrontRight][1] = 1.0;
break;
case AudioChannelSet::Surround51:
case AudioChannelSet::Surround71:
m_coefs[AudioChannel::FrontLeft][0] = 1.0;
m_coefs[AudioChannel::FrontRight][1] = 1.0;
break;
}
}
void AudioMatrixStereo::bufferStereoSampleData(IAudioVoice& voice, const int16_t* data, size_t frames)
{
const ChannelMap& chmap = voice.channelMap();
m_interleaveBuf.clear();
m_interleaveBuf.reserve(frames * chmap.m_channelCount);
for (size_t f=0 ; f<frames ; ++f, data += 2)
for (int c=0 ; c<chmap.m_channelCount ; ++c)
m_interleaveBuf.push_back(data[0] * m_coefs[chmap.m_channels[c][0]] +
data[1] * m_coefs[chmap.m_channels[c][1]]);
voice.bufferSampleData(m_interleaveBuf.data(), frames);
}
}