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/*
* sndctl - a plugin for the Video Disk Recorder
* file: mixer.c
* description: parent class for all types of mixer devices
*
* author: Thomas Hildebrandt <toxym@web.de>
*
* inspired by and reengineered from 'avolctl'
* thanks to Martin Prochnow <nordlichtl@martins-kabuff.de>
*/
#include "defaults.h"
#include "mixer.h"
#include "soundset.h"
/*********************************************************
* member functions for class cMixer
*********************************************************/
/*
* constructor
*/
cMixer::cMixer(){
}
/*
* destructor
*/
cMixer::~cMixer(){
int countControls = vControls.size();
for(int i = 0 ; i < countControls ; i++) {
delete vControls[i];
}
}
int cMixer::CountControls() {
return vControls.size();
}
/*
* returns a vector with all controls names
*/
vector<cControlId> cMixer::GetControls( void ){
vector<cControlId> ctrls;
int i;
// loop over all controls
for( i = 0; i < vControls.size(); i++ ) {
ctrls.push_back(cControlId(vControls[i]->soundCardId, vControls[i]->name, vControls[i]->controlNr));
}
return ctrls;
}
/*
* update mixer values
*/
void cMixer::Update( cSoundSet *SoundSet ){
int i;
string::size_type loc;
string v;
dsyslog( "sndctl (cMixer::Update): Updating controls with sound set '%s'.", SoundSet->GetName().c_str());
// loop over all controls
for( i = 0; i < vControls.size(); i++ ){
control* actualControl = vControls[i];
v = SoundSet->Get(cControlId(actualControl->soundCardId, actualControl->name, actualControl->controlNr ));
// get operation
actualControl->op = v.substr( 0, 1 ).c_str()[0];
// get value
if(actualControl->op == SNDCTL_MIXER_NONE )
actualControl->value = 0;
else
actualControl->value = atoi( v.substr( 1 ).c_str());
// check and correct limits
actualControl->value = actualControl->value < 0 ? 0 : actualControl->value;
actualControl->value = actualControl->value > 999 ? 999 : actualControl->value;
// check and set minimum volume
actualControl->limitL = actualControl->min;
if(( loc = v.find( ';', 0 )) != string::npos )
actualControl->limitL = atoi( v.substr( ++loc ).c_str());
// check and set maximum volume
actualControl->limitU = actualControl->max;
if(( loc != string::npos ) && (( loc = v.find( ';', loc )) != string::npos ))
vControls[i]->limitU = atoi( v.substr( ++loc ).c_str());
dsyslog( "sndctl (cMixer::Update): '%s' updated with %c%d;%ld;%ld", actualControl->name.c_str(), actualControl->op, actualControl->value, actualControl->limitL, actualControl->limitU );
}
}
/*
* sets the volume of this sound set
*/
void cMixer::Volume( int Vol ){
int i;
long vol;
dsyslog( "sndctl (cMixer::Volume): Volume goes to %d%%.", Vol );
// loop over all controls
for( i = 0; i < vControls.size(); i++ ){
control* actualControl = vControls[i];
// initial value for 'volume'
actualControl->volume = -1;
// calculate volume according to operation mode
switch( actualControl->op ){
case SNDCTL_MIXER_STATIC:
vol = actualControl->value;
break;
case SNDCTL_MIXER_PLUS:
vol = Vol + actualControl->value;
break;
case SNDCTL_MIXER_MINUS:
vol = Vol - actualControl->value;
break;
case SNDCTL_MIXER_PERCENT:
vol = Vol * actualControl->value / 100;
break;
case SNDCTL_MIXER_NONE:
default:
dsyslog( "sndctl (cMixer::Volume): Control '%s' stays unchanged.", actualControl->name.c_str());
continue;
break;
}
// Vol = 0 means, no matter, what happend before
if( Vol == 0 )
vol = 0;
// scale volume to real values
vol = actualControl->min + ( actualControl->max - actualControl->min ) * vol / 100;
// check for hard limits
if( Vol > 0 && vol < actualControl->limitL )
vol = actualControl->limitL;
if( vol > actualControl->limitU )
vol = actualControl->limitU;
dsyslog( "sndctl (cMixer::Volume): Control '%s' goes to '%ld'.", actualControl->name.c_str(), vol );
// set volume
actualControl->volume = vol;
}
// set volumes to real hardware
Volumes();
}
cControlId::cControlId(string SoundCardId, string DisplayName, int ControlNr) {
name = DisplayName;
soundCardId = SoundCardId;
controlNr = ControlNr;
}
cControlId::cControlId() : name(), soundCardId(), controlNr(0) {
}
bool cControlId::operator==(cControlId const& b) {
return controlNr == b.controlNr && soundCardId.compare(b.soundCardId) == 0;
}
string cControlId::getDisplayName() { return name; }
int cControlId::getControlNr() { return controlNr; }
string cControlId::getSoundCardId() { return soundCardId; }
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