// 从AudioDataSource获取WAVEFORMATEX
/////////////////////////////////////////////////////////////////////////////////
WAVEFORMATEX WaveFormatEx(AudioDataSourcePtr const & dataSource)
{
WAVEFORMATEX wfx;
wfx.wFormatTag = WAVE_FORMAT_PCM;
wfx.nSamplesPerSec = dataSource->Freq();
wfx.cbSize = 0;
wfx.wBitsPerSample = 8;
wfx.nChannels = 1;
switch (dataSource->Format())
{
case AF_Mono8:
wfx.wBitsPerSample = 8;
wfx.nChannels = 1;
break;
case AF_Mono16:
wfx.wBitsPerSample = 16;
wfx.nChannels = 1;
break;
case AF_Stereo8:
wfx.wBitsPerSample = 8;
wfx.nChannels = 2;
break;
case AF_Stereo16:
wfx.wBitsPerSample = 16;
wfx.nChannels = 2;
break;
case AF_Unknown:
BOOST_ASSERT(false);
break;
}
wfx.nBlockAlign = wfx.nChannels * wfx.wBitsPerSample / 8;
wfx.nAvgBytesPerSec = wfx.nSamplesPerSec * wfx.nBlockAlign;
return wfx;
}
WAVEFORMATEX WaveFormatEx(AudioDataSourcePtr const & data_source)
{
WAVEFORMATEX wfx;
wfx.wFormatTag = WAVE_FORMAT_PCM;
wfx.nSamplesPerSec = data_source->Freq();
wfx.cbSize = 0;
wfx.wBitsPerSample = 8;
wfx.nChannels = 1;
switch (data_source->Format())
{
case AF_Mono8:
wfx.wBitsPerSample = 8;
wfx.nChannels = 1;
break;
case AF_Mono16:
wfx.wBitsPerSample = 16;
wfx.nChannels = 1;
break;
case AF_Stereo8:
wfx.wBitsPerSample = 8;
wfx.nChannels = 2;
break;
case AF_Stereo16:
wfx.wBitsPerSample = 16;
wfx.nChannels = 2;
break;
default:
KFL_UNREACHABLE("Invalid audio format");
}
wfx.nBlockAlign = wfx.nChannels * wfx.wBitsPerSample / 8;
wfx.nAvgBytesPerSec = wfx.nSamplesPerSec * wfx.nBlockAlign;
return wfx;
}