void PORT_SetFloatValue(void* controlIDV, float value) {
PortControl* portControl = (PortControl*) controlIDV;
if (portControl != NULL) {
if (portControl->controlType == CONTROL_TYPE_VOLUME) {
switch (portControl->channel) {
case CHANNELS_MONO:
setRealVolume(portControl, SND_MIXER_SCHN_MONO, value);
break;
case CHANNELS_STEREO:
setFakeVolume(portControl, value, getFakeBalance(portControl));
break;
default:
setRealVolume(portControl, portControl->channel, value);
}
} else if (portControl->controlType == CONTROL_TYPE_BALANCE) {
if (portControl->channel == CHANNELS_STEREO) {
setFakeVolume(portControl, getFakeVolume(portControl), value);
} else {
ERROR0("PORT_SetFloatValue(): Balance only allowed for stereo channels!\n");
}
} else {
ERROR1("PORT_SetFloatValue(): inappropriate control type: %s!\n",
portControl->controlType);
}
}
}
/*
* sets the unsigned values for left and right volume according to
* the given volume (0...1) and balance (-1..0..+1)
*/
static void setFakeVolume(PortControl* portControl, float vol, float bal) {
float volumeLeft;
float volumeRight;
if (bal < 0.0f) {
volumeLeft = vol;
volumeRight = vol * (bal + 1.0f);
} else {
volumeLeft = vol * (1.0f - bal);
volumeRight = vol;
}
setRealVolume(portControl, SND_MIXER_SCHN_FRONT_LEFT, volumeLeft);
setRealVolume(portControl, SND_MIXER_SCHN_FRONT_RIGHT, volumeRight);
}
bool SIDInfo::setVolume(long val)
{
if (!hasVolume || !_sid || globalMax < 1) return false;
if (val > 0) _isEmulMuted = false;
return setRealVolume(val*(max-min)/globalMax);
}
bool SIDInfo::setEmulMute(bool mute)
{
if (!hasVolume || !_sid) return false;
snd_mixer_elem_t* elem = snd_mixer_find_selem(_handle, _sid);
if (!elem) return false;
if (mute == _isEmulMuted) return true;
if (mute)
{
_isEmulMuted = true;
_lastVol = getRealVolume();
return setRealVolume(min);
}
else
{
_isEmulMuted = false;
bool ret = setRealVolume(_lastVol);
_lastVol = min;
return ret;
}
}
