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added support for the mon-in/stereo-out mode in the signal processing class (client.cpp)

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This commit is contained in:
Volker Fischer 2014-02-23 20:55:42 +00:00
parent 5811b1f9d4
commit c8f0a376ab
1 changed files with 54 additions and 37 deletions
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91
src/client.cpp
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@ -937,8 +937,18 @@ void CClient::ProcessAudioDataIntern ( CVector<int16_t>& vecsStereoSndCrd )
const double dRevLev =
static_cast<double> ( iReverbLevel ) / AUD_REVERB_MAX / 2;
if ( eAudioChannelConf == CC_MONO )
if ( eAudioChannelConf == CC_STEREO )
{
// for stereo always apply reverberation effect on both channels
for ( i = 0; i < iStereoBlockSizeSam; i += 2 )
{
// both channels (stereo)
AudioReverbL.ProcessSample ( vecsStereoSndCrd[i], vecsStereoSndCrd[i + 1], dRevLev );
}
}
else
{
// mono and mono-in/stereo out mode
if ( bReverbOnLeftChan )
{
for ( i = 0; i < iStereoBlockSizeSam; i += 2 )
@ -958,15 +968,6 @@ void CClient::ProcessAudioDataIntern ( CVector<int16_t>& vecsStereoSndCrd )
}
}
}
else
{
// for stereo always apply reverberation effect on both channels
for ( i = 0; i < iStereoBlockSizeSam; i += 2 )
{
// both channels (stereo)
AudioReverbL.ProcessSample ( vecsStereoSndCrd[i], vecsStereoSndCrd[i + 1], dRevLev );
}
}
}
// mix both signals depending on the fading setting, convert
@ -974,7 +975,7 @@ void CClient::ProcessAudioDataIntern ( CVector<int16_t>& vecsStereoSndCrd )
if ( iAudioInFader == AUD_FADER_IN_MIDDLE )
{
// no action require if fader is in the middle and stereo is used
if ( eAudioChannelConf == CC_MONO )
if ( eAudioChannelConf != CC_STEREO )
{
// mix channels together (store result in first half of the vector)
for ( i = 0, j = 0; i < iMonoBlockSizeSam; i++, j += 2 )
@ -990,9 +991,35 @@ void CClient::ProcessAudioDataIntern ( CVector<int16_t>& vecsStereoSndCrd )
}
else
{
if ( eAudioChannelConf == CC_MONO )
if ( eAudioChannelConf == CC_STEREO )
{
// mono
// stereo
const double dAttFactStereo = static_cast<double> (
AUD_FADER_IN_MIDDLE - abs ( AUD_FADER_IN_MIDDLE - iAudioInFader ) ) /
AUD_FADER_IN_MIDDLE;
if ( iAudioInFader > AUD_FADER_IN_MIDDLE )
{
for ( i = 0, j = 0; i < iMonoBlockSizeSam; i++, j += 2 )
{
// attenuation on right channel
vecsStereoSndCrd[j + 1] = Double2Short (
dAttFactStereo * vecsStereoSndCrd[j + 1] );
}
}
else
{
for ( i = 0, j = 0; i < iMonoBlockSizeSam; i++, j += 2 )
{
// attenuation on left channel
vecsStereoSndCrd[j] = Double2Short (
dAttFactStereo * vecsStereoSndCrd[j] );
}
}
}
else
{
// mono and mono-in/stereo out mode
// make sure that in the middle position the two channels are
// amplified by 1/2, if the pan is set to one channel, this
// channel should have an amplification of 1
@ -1027,31 +1054,21 @@ void CClient::ProcessAudioDataIntern ( CVector<int16_t>& vecsStereoSndCrd )
}
}
}
else
{
// stereo
const double dAttFactStereo = static_cast<double> (
AUD_FADER_IN_MIDDLE - abs ( AUD_FADER_IN_MIDDLE - iAudioInFader ) ) /
AUD_FADER_IN_MIDDLE;
}
if ( iAudioInFader > AUD_FADER_IN_MIDDLE )
{
for ( i = 0, j = 0; i < iMonoBlockSizeSam; i++, j += 2 )
{
// attenuation on right channel
vecsStereoSndCrd[j + 1] = Double2Short (
dAttFactStereo * vecsStereoSndCrd[j + 1] );
}
}
else
{
for ( i = 0, j = 0; i < iMonoBlockSizeSam; i++, j += 2 )
{
// attenuation on left channel
vecsStereoSndCrd[j] = Double2Short (
dAttFactStereo * vecsStereoSndCrd[j] );
}
}
// Support for mono-in/stereo-out mode: Per definition this mode works in
// full stereo mode at the transmission level. The only thing which is done
// is to mix both sound card inputs together and then put this signal on
// both stereo channels to be transmitted to the server.
if ( eAudioChannelConf == CC_MONO_IN_STEREO_OUT )
{
// copy mono data in stereo sound card buffer (note that since the input
// and output is the same buffer, we have to start from the end not to
// overwrite input values)
for ( i = iMonoBlockSizeSam - 1, j = iStereoBlockSizeSam - 2; i >= 0; i--, j -= 2 )
{
vecsStereoSndCrd[j] = vecsStereoSndCrd[j + 1] =
vecsStereoSndCrd[i];
}
}