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for ASIO and 4 channel input, support mixing channels 1&2 with 3&4

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This commit is contained in:
Volker Fischer 2018-03-26 15:56:34 +00:00
parent 0b906f8498
commit a7454095d3
1 changed files with 95 additions and 10 deletions
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105
windows/sound.cpp
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@ -44,6 +44,7 @@ QString CSound::LoadAndInitializeDriver ( int iDriverIdx )
{
// load driver
loadAsioDriver ( cDriverNames[iDriverIdx] );
if ( ASIOInit ( &driverInfo ) != ASE_OK )
{
// clean up and return error string
@ -125,6 +126,8 @@ QString CSound::CheckDeviceCapabilities()
}
// query channel infos for all available input channels
bool bInputChMixingSupported = true;
for ( int i = 0; i < lNumInChan; i++ )
{
// setup for input channels
@ -144,6 +147,14 @@ QString CSound::CheckDeviceCapabilities()
// return error string
return tr ( "Required audio sample format not available." );
}
// store the name of the channel and check if channel mixing is supported
channelInputName[i] = channelInfosInput[i].name;
if ( !CheckSampleTypeSupportedForCHMixing ( channelInfosInput[i].type ) )
{
bInputChMixingSupported = false;
}
}
// query channel infos for all available output channels
@ -168,6 +179,32 @@ QString CSound::CheckDeviceCapabilities()
}
}
// special case with 4 input channels: support adding channels
if ( ( lNumInChan == 4 ) && bInputChMixingSupported )
{
// add four mixed channels (i.e. 4 normal, 4 mixed channels)
lNumInChanPlusAddChan = 8;
for ( int iCh = 0; iCh < lNumInChanPlusAddChan; iCh++ )
{
int iSelCH, iSelAddCH;
GetSelCHAndAddCH ( iCh, lNumInChan, iSelCH, iSelAddCH );
if ( iSelAddCH >= 0 )
{
// for mixed channels, show both audio channel names to be mixed
channelInputName[iCh] =
channelInputName[iSelCH] + " + " + channelInputName[iSelAddCH];
}
}
}
else
{
// regular case: no mixing input channels used
lNumInChanPlusAddChan = lNumInChan;
}
// everything is ok, return empty string for "no error" case
return "";
}
@ -175,8 +212,7 @@ QString CSound::CheckDeviceCapabilities()
void CSound::SetLeftInputChannel ( const int iNewChan )
{
// apply parameter after input parameter check
if ( ( iNewChan >= 0 ) && ( iNewChan < lNumInChan ) &&
( iNewChan != vSelectedInputChannels[1] ) )
if ( ( iNewChan >= 0 ) && ( iNewChan < lNumInChanPlusAddChan ) )
{
vSelectedInputChannels[0] = iNewChan;
}
@ -185,8 +221,7 @@ void CSound::SetLeftInputChannel ( const int iNewChan )
void CSound::SetRightInputChannel ( const int iNewChan )
{
// apply parameter after input parameter check
if ( ( iNewChan >= 0 ) && ( iNewChan < lNumInChan ) &&
( iNewChan != vSelectedInputChannels[0] ) )
if ( ( iNewChan >= 0 ) && ( iNewChan < lNumInChanPlusAddChan ) )
{
vSelectedInputChannels[1] = iNewChan;
}
@ -195,8 +230,7 @@ void CSound::SetRightInputChannel ( const int iNewChan )
void CSound::SetLeftOutputChannel ( const int iNewChan )
{
// apply parameter after input parameter check
if ( ( iNewChan >= 0 ) && ( iNewChan < lNumOutChan ) &&
( iNewChan != vSelectedOutputChannels[1] ) )
if ( ( iNewChan >= 0 ) && ( iNewChan < lNumOutChan ) )
{
vSelectedOutputChannels[0] = iNewChan;
}
@ -205,8 +239,7 @@ void CSound::SetLeftOutputChannel ( const int iNewChan )
void CSound::SetRightOutputChannel ( const int iNewChan )
{
// apply parameter after input parameter check
if ( ( iNewChan >= 0 ) && ( iNewChan < lNumOutChan ) &&
( iNewChan != vSelectedOutputChannels[0] ) )
if ( ( iNewChan >= 0 ) && ( iNewChan < lNumOutChan ) )
{
vSelectedOutputChannels[1] = iNewChan;
}
@ -421,6 +454,7 @@ CSound::CSound ( void (*fpNewCallback) ( CVector<int16_t>& psData, void* arg ),
vSelectedInputChannels ( NUM_IN_OUT_CHANNELS ),
vSelectedOutputChannels ( NUM_IN_OUT_CHANNELS ),
lNumInChan ( 0 ),
lNumInChanPlusAddChan ( 0 ),
lNumOutChan ( 0 ),
dInOutLatencyMs ( 0.0 ) // "0.0" means that no latency value is available
{
@ -516,6 +550,14 @@ bool CSound::CheckSampleTypeSupported ( const ASIOSampleType SamType )
( SamType == ASIOSTInt32MSB24 ) );
}
bool CSound::CheckSampleTypeSupportedForCHMixing ( const ASIOSampleType SamType )
{
// check for supported sample types for audio channel mixing (see bufferSwitch)
return ( ( SamType == ASIOSTInt16LSB ) ||
( SamType == ASIOSTInt24LSB ) ||
( SamType == ASIOSTInt32LSB ) );
}
void CSound::bufferSwitch ( long index, ASIOBool )
{
int iCurSample;
@ -530,7 +572,10 @@ void CSound::bufferSwitch ( long index, ASIOBool )
// CAPTURE -------------------------------------------------------------
for ( int i = 0; i < NUM_IN_OUT_CHANNELS; i++ )
{
const int iSelCH = pSound->vSelectedInputChannels[i];
int iSelCH, iSelAddCH;
GetSelCHAndAddCH ( pSound->vSelectedInputChannels[i], pSound->lNumInChan,
iSelCH, iSelAddCH );
// copy new captured block in thread transfer buffer (copy
// mono data interleaved in stereo buffer)
@ -545,11 +590,23 @@ void CSound::bufferSwitch ( long index, ASIOBool )
{
vecsTmpAudioSndCrdStereo[2 * iCurSample + i] = pASIOBuf[iCurSample];
}
if ( iSelAddCH >= 0 )
{
// mix input channels case:
int16_t* pASIOBufAdd = static_cast<int16_t*> ( pSound->bufferInfos[iSelAddCH].buffers[index] );
for ( iCurSample = 0; iCurSample < iASIOBufferSizeMono; iCurSample++ )
{
vecsTmpAudioSndCrdStereo[2 * iCurSample + i] =
Double2Short ( (double) vecsTmpAudioSndCrdStereo[2 * iCurSample + i] +
(double) pASIOBufAdd[iCurSample] );
}
}
break;
}
case ASIOSTInt24LSB:
// NOT YET TESTED
for ( iCurSample = 0; iCurSample < iASIOBufferSizeMono; iCurSample++ )
{
int iCurSam = 0;
@ -558,6 +615,21 @@ void CSound::bufferSwitch ( long index, ASIOBool )
vecsTmpAudioSndCrdStereo[2 * iCurSample + i] = static_cast<int16_t> ( iCurSam );
}
if ( iSelAddCH >= 0 )
{
// mix input channels case:
for ( iCurSample = 0; iCurSample < iASIOBufferSizeMono; iCurSample++ )
{
int iCurSam = 0;
memcpy ( &iCurSam, ( (char*) pSound->bufferInfos[iSelAddCH].buffers[index] ) + iCurSample * 3, 3 );
iCurSam >>= 8;
vecsTmpAudioSndCrdStereo[2 * iCurSample + i] =
Double2Short ( (double) vecsTmpAudioSndCrdStereo[2 * iCurSample + i] +
(double) static_cast<int16_t> ( iCurSam ) );
}
}
break;
case ASIOSTInt32LSB:
@ -569,6 +641,19 @@ void CSound::bufferSwitch ( long index, ASIOBool )
vecsTmpAudioSndCrdStereo[2 * iCurSample + i] =
static_cast<int16_t> ( pASIOBuf[iCurSample] >> 16 );
}
if ( iSelAddCH >= 0 )
{
// mix input channels case:
int32_t* pASIOBufAdd = static_cast<int32_t*> ( pSound->bufferInfos[iSelAddCH].buffers[index] );
for ( iCurSample = 0; iCurSample < iASIOBufferSizeMono; iCurSample++ )
{
vecsTmpAudioSndCrdStereo[2 * iCurSample + i] =
Double2Short ( (double) vecsTmpAudioSndCrdStereo[2 * iCurSample + i] +
(double) static_cast<int16_t> ( pASIOBufAdd[iCurSample] >> 16 ) );
}
}
break;
}