1 files changed, 176 insertions, 0 deletions
diff --git a/mixer.c b/mixer.c
new file mode 100644
index 0000000..bac74a1
--- /dev/null
+++ b/mixer.c
@@ -0,0 +1,176 @@
+/*
+ * 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; }