// ----------------------------------------------------------
void ofxAudioUnitInput::connectTo(ofxAudioUnit &otherUnit, int destinationBus, int sourceBus)
// ----------------------------------------------------------
{
AURenderCallbackStruct callback;
callback.inputProc = pullCallback;
callback.inputProcRefCon = &_renderContext;
AudioStreamBasicDescription ASBD;
UInt32 ASBDSize = sizeof(ASBD);
OFXAU_RETURN(AudioUnitGetProperty(*otherUnit.getUnit(),
kAudioUnitProperty_StreamFormat,
kAudioUnitScope_Input,
destinationBus,
&ASBD,
&ASBDSize),
"getting hardware input destination's format");
OFXAU_RETURN(AudioUnitSetProperty(*_unit,
kAudioUnitProperty_StreamFormat,
kAudioUnitScope_Output,
1,
&ASBD,
sizeof(ASBD)),
"setting hardware input's output format");
otherUnit.setRenderCallback(callback, destinationBus);
}
void ofxAudioUnitFilePlayer::prime() {
_region = RegionForEntireFile(_fileID[0]);
if(_seekSampleTime) {
_region.mStartFrame = _seekSampleTime;
_pauseTimeAccumulator += _seekSampleTime;
} else if(_pauseTimeStamp.mSampleTime > 0) {
_region.mStartFrame = _pauseTimeStamp.mSampleTime + _pauseTimeAccumulator;
_pauseTimeAccumulator += _pauseTimeStamp.mSampleTime;
} else {
_pauseTimeAccumulator = 0;
}
if(_loopCount > 0) {
_region.mLoopCount = _loopCount;
}
// resetting time-tracking members
memset(&_pauseTimeStamp, 0, sizeof(_pauseTimeStamp));
_loopCount = 0;
_seekSampleTime = 0;
if(!(_region.mTimeStamp.mFlags & kAudioTimeStampHostTimeValid)) {
cout << "ofxAudioUnitFilePlayer has no file to play" << endl;
return;
}
OFXAU_RETURN(AudioUnitSetProperty(*_unit,
kAudioUnitProperty_ScheduledFileIDs,
kAudioUnitScope_Global,
0,
_fileID,
sizeof(_fileID)),
"setting file player's file ID");
OFXAU_RETURN(AudioUnitSetProperty(*_unit,
kAudioUnitProperty_ScheduledFileRegion,
kAudioUnitScope_Global,
0,
&_region,
sizeof(_region)),
"setting file player region");
UInt32 framesToPrime = 0; // 0 = "use the default"
OFXAU_RETURN(AudioUnitSetProperty(*_unit,
kAudioUnitProperty_ScheduledFilePrime,
kAudioUnitScope_Global,
0,
&framesToPrime,
sizeof(framesToPrime)),
"priming file player");
_primed = true;
}
// ----------------------------------------------------------
void ofxAudioUnitFilePlayer::play(uint64_t startTime)
// ----------------------------------------------------------
{
if(!(_region.mTimeStamp.mFlags & kAudioTimeStampHostTimeValid))
{
cout << "ofxAudioUnitFilePlayer has no file to play" << endl;
return;
}
OFXAU_RETURN(AudioUnitSetProperty(*_unit,
kAudioUnitProperty_ScheduledFileIDs,
kAudioUnitScope_Global,
0,
_fileID,
sizeof(_fileID)),
"setting file player's file ID");
OFXAU_RETURN(AudioUnitSetProperty(*_unit,
kAudioUnitProperty_ScheduledFileRegion,
kAudioUnitScope_Global,
0,
&_region,
sizeof(_region)),
"setting file player region");
if(startTime == 0)
{
startTime = mach_absolute_time();
}
AudioTimeStamp startTimeStamp = {0};
FillOutAudioTimeStampWithHostTime(startTimeStamp, startTime);
OFXAU_RETURN(AudioUnitSetProperty(*_unit,
kAudioUnitProperty_ScheduleStartTimeStamp,
kAudioUnitScope_Global,
0,
&startTimeStamp,
sizeof(startTimeStamp)),
"setting file player start time");
}
void ofxAudioUnitFilePlayer::play(uint64_t startTime) {
if(!_primed) {
prime();
}
_primed = false;
if(startTime == 0) {
startTime = mach_absolute_time();
}
AudioTimeStamp startTimeStamp = {0};
FillOutAudioTimeStampWithHostTime(startTimeStamp, startTime);
OFXAU_RETURN(AudioUnitSetProperty(*_unit,
kAudioUnitProperty_ScheduleStartTimeStamp,
kAudioUnitScope_Global,
0,
&startTimeStamp,
sizeof(startTimeStamp)),
"setting file player start time");
}
