ComponentResult AUInstrumentBase::Render( AudioUnitRenderActionFlags & ioActionFlags,
const AudioTimeStamp & inTimeStamp,
UInt32 inNumberFrames)
{
PerformEvents(inTimeStamp);
UInt32 numOutputs = Outputs().GetNumberOfElements();
for (UInt32 j = 0; j < numOutputs; ++j)
{
AudioBufferList& bufferList = GetOutput(j)->GetBufferList();
for (UInt32 k = 0; k < bufferList.mNumberBuffers; ++k)
{
memset(bufferList.mBuffers[k].mData, 0, bufferList.mBuffers[k].mDataByteSize);
}
}
UInt32 numGroups = Groups().GetNumberOfElements();
for (UInt32 j = 0; j < numGroups; ++j)
{
SynthGroupElement *group = (SynthGroupElement*)Groups().GetElement(j);
OSStatus err = group->Render(inNumberFrames);
if (err) return err;
}
mAbsoluteSampleFrame += inNumberFrames;
return noErr;
}
ComponentResult AUInstrumentBase::Reset( AudioUnitScope inScope,
AudioUnitElement inElement)
{
#if DEBUG_PRINT
printf("AUInstrumentBase::Reset\n");
#endif
if (inScope == kAudioUnitScope_Global)
{
// kill all notes..
mFreeNotes.Empty();
for (UInt32 i=0; i<mNumNotes; ++i)
{
SynthNote *note = GetNote(i);
if (note->IsSounding())
note->Kill(0);
note->ListRemove();
mFreeNotes.AddNote(note);
}
mNumActiveNotes = 0;
mAbsoluteSampleFrame = 0;
// empty lists.
UInt32 numGroups = Groups().GetNumberOfElements();
for (UInt32 j = 0; j < numGroups; ++j)
{
SynthGroupElement *group = (SynthGroupElement*)Groups().GetElement(j);
group->Reset();
}
}
return noErr;
}
OSStatus AUInstrumentBase::HandleControlChange( UInt8 inChannel,
UInt8 inController,
UInt8 inValue,
UInt32 inStartFrame)
{
#if DEBUG_PRINT
printf("AUInstrumentBase::HandleControlChange ch %u ctlr: %u val: %u frm: %u\n", inChannel, inController, inValue, inStartFrame);
#endif
SynthGroupElement *gp = GetElForGroupID(inChannel);
if (gp)
{
gp->ChannelMessage(inController, inValue);
}
else
return kAudioUnitErr_InvalidElement;
switch (inController)
{
case kMidiController_Sustain :
if (inValue >= 64)
SendPedalEvent(inChannel, SynthEvent::kEventType_SustainOn, inStartFrame);
else
SendPedalEvent(inChannel, SynthEvent::kEventType_SustainOff, inStartFrame);
break;
case kMidiController_Sostenuto :
if (inValue >= 64)
SendPedalEvent(inChannel, SynthEvent::kEventType_SostenutoOn, inStartFrame);
else
SendPedalEvent(inChannel, SynthEvent::kEventType_SostenutoOff, inStartFrame);
break;
}
return noErr;
}
OSStatus AUInstrumentBase::Render( AudioUnitRenderActionFlags & ioActionFlags,
const AudioTimeStamp & inTimeStamp,
UInt32 inNumberFrames)
{
PerformEvents(inTimeStamp);
AUScope &outputs = Outputs();
UInt32 numOutputs = outputs.GetNumberOfElements();
for (UInt32 j = 0; j < numOutputs; ++j)
{
GetOutput(j)->PrepareBuffer(inNumberFrames); // AUBase::DoRenderBus() only does this for the first output element
AudioBufferList& bufferList = GetOutput(j)->GetBufferList();
for (UInt32 k = 0; k < bufferList.mNumberBuffers; ++k)
{
memset(bufferList.mBuffers[k].mData, 0, bufferList.mBuffers[k].mDataByteSize);
}
}
UInt32 numGroups = Groups().GetNumberOfElements();
for (UInt32 j = 0; j < numGroups; ++j)
{
SynthGroupElement *group = (SynthGroupElement*)Groups().GetElement(j);
OSStatus err = group->Render((SInt64)inTimeStamp.mSampleTime, inNumberFrames, outputs);
if (err) return err;
}
mAbsoluteSampleFrame += inNumberFrames;
return noErr;
}
OSStatus AUInstrumentBase::HandleChannelPressure(UInt8 inChannel,
UInt8 inValue,
UInt32 inStartFrame)
{
SynthGroupElement *gp = GetElForGroupID(inChannel);
if (gp)
{
gp->ChannelMessage(kMidiMessage_ChannelPressure, inValue);
return noErr;
}
else
return kAudioUnitErr_InvalidElement;
}
OSStatus AUInstrumentBase::HandlePitchWheel( UInt8 inChannel,
UInt8 inPitch1, // LSB
UInt8 inPitch2, // MSB
UInt32 inStartFrame)
{
SynthGroupElement *gp = GetElForGroupID(inChannel);
if (gp)
{
gp->ChannelMessage(kMidiMessage_PitchWheel, (inPitch2 << 7) | inPitch1);
return noErr;
}
else
return kAudioUnitErr_InvalidElement;
}
OSStatus AUInstrumentBase::HandlePolyPressure( UInt8 inChannel,
UInt8 inKey,
UInt8 inValue,
UInt32 inStartFrame)
{
SynthGroupElement *gp = GetElForGroupID(inChannel);
if (gp)
{
// Combine key and value into single argument. UGLY!
gp->ChannelMessage(kMidiMessage_PolyPressure, (inKey << 7) | inValue);
return noErr;
}
else
return kAudioUnitErr_InvalidElement;
}
OSStatus AUInstrumentBase::HandleProgramChange( UInt8 inChannel,
UInt8 inValue)
{
#if DEBUG_PRINT
printf("AUInstrumentBase::HandleProgramChange %u %u\n", inChannel, inValue);
#endif
SynthGroupElement *gp = GetElForGroupID(inChannel);
if (gp)
{
gp->ChannelMessage(kMidiMessage_ProgramChange, inValue);
return noErr;
}
else
return kAudioUnitErr_InvalidElement;
}
SynthGroupElement * AUInstrumentBase::GetElForNoteID (NoteInstanceID inNoteID)
{
#if DEBUG_PRINT
printf("GetElForNoteID id %u\n", inNoteID);
#endif
AUScope & groups = Groups();
unsigned int numEls = groups.GetNumberOfElements();
for (unsigned int i = 0; i < numEls; ++i) {
SynthGroupElement* el = reinterpret_cast<SynthGroupElement*>(groups.GetElement(i));
if (el->GetNote(inNoteID) != NULL) // searches for any note state
return el;
}
throw static_cast<OSStatus>(kAudioUnitErr_InvalidElement);
}
void AUInstrumentBase::PerformEvents(const AudioTimeStamp& inTimeStamp)
{
#if DEBUG_PRINT_RENDER
printf("AUInstrumentBase::PerformEvents\n");
#endif
SynthEvent *event;
SynthGroupElement *group;
while ((event = mEventQueue.ReadItem()) != NULL)
{
#if DEBUG_PRINT_RENDER
printf("event %08X %d\n", event, event->GetEventType());
#endif
switch(event->GetEventType())
{
case SynthEvent::kEventType_NoteOn :
RealTimeStartNote(GetElForGroupID (event->GetGroupID()), event->GetNoteID(),
event->GetOffsetSampleFrame(), *event->GetParams());
break;
case SynthEvent::kEventType_NoteOff :
RealTimeStopNote(GetElForGroupID (event->GetGroupID()), event->GetNoteID(),
event->GetOffsetSampleFrame());
break;
case SynthEvent::kEventType_SustainOn :
group = GetElForGroupID (event->GetGroupID());
group->SustainOn(event->GetOffsetSampleFrame());
break;
case SynthEvent::kEventType_SustainOff :
group = GetElForGroupID (event->GetGroupID());
group->SustainOff(event->GetOffsetSampleFrame());
break;
case SynthEvent::kEventType_SostenutoOn :
group = GetElForGroupID (event->GetGroupID());
group->SostenutoOn(event->GetOffsetSampleFrame());
break;
case SynthEvent::kEventType_SostenutoOff :
group = GetElForGroupID (event->GetGroupID());
group->SostenutoOff(event->GetOffsetSampleFrame());
break;
case SynthEvent::kEventType_AllNotesOff :
group = GetElForGroupID (event->GetGroupID());
group->AllNotesOff(event->GetOffsetSampleFrame());
break;
case SynthEvent::kEventType_AllSoundOff :
group = GetElForGroupID (event->GetGroupID());
group->AllSoundOff(event->GetOffsetSampleFrame());
break;
case SynthEvent::kEventType_ResetAllControllers :
group = GetElForGroupID (event->GetGroupID());
group->ResetAllControllers(event->GetOffsetSampleFrame());
break;
}
mEventQueue.AdvanceReadPtr();
}
}
OSStatus AUInstrumentBase::RealTimeStopNote(
MusicDeviceGroupID inGroupID,
NoteInstanceID inNoteInstanceID,
UInt32 inOffsetSampleFrame)
{
#if DEBUG_PRINT
printf("AUInstrumentBase::RealTimeStopNote ch %d id %d\n", inGroupID, inNoteInstanceID);
#endif
SynthGroupElement *gp = (inGroupID == kMusicNoteEvent_Unused
? GetElForNoteID (inNoteInstanceID)
: GetElForGroupID(inGroupID));
if (gp)
{
gp->NoteOff (inNoteInstanceID, inOffsetSampleFrame);
}
return noErr;
}
SynthGroupElement * AUInstrumentBase::GetElForGroupID (MusicDeviceGroupID inGroupID)
{
AUScope & groups = Groups();
unsigned int numEls = groups.GetNumberOfElements();
SynthGroupElement* unassignedEl = NULL;
for (unsigned int i = 0; i < numEls; ++i) {
SynthGroupElement* el = reinterpret_cast<SynthGroupElement*>(groups.GetElement(i));
if (el->GroupID() == inGroupID)
return el;
if (el->GroupID() == SynthGroupElement::kUnassignedGroup) {
unassignedEl = el;
break; // we fill this up from the start of the group scope vector
}
}
if (unassignedEl) {
unassignedEl->SetGroupID(inGroupID);
return unassignedEl;
}
throw static_cast<OSStatus>(kAudioUnitErr_InvalidElement);
}
OSStatus AUInstrumentBase::SendPedalEvent(MusicDeviceGroupID inGroupID, UInt32 inEventType, UInt32 inOffsetSampleFrame)
{
if (InRenderThread ())
{
SynthGroupElement *group = GetElForGroupID(inGroupID);
if (!group)
return kAudioUnitErr_InvalidElement;
switch (inEventType)
{
case SynthEvent::kEventType_SustainOn :
group->SustainOn(inOffsetSampleFrame);
break;
case SynthEvent::kEventType_SustainOff :
group->SustainOff(inOffsetSampleFrame);
break;
case SynthEvent::kEventType_SostenutoOn :
group->SostenutoOn(inOffsetSampleFrame);
break;
case SynthEvent::kEventType_SostenutoOff :
group->SostenutoOff(inOffsetSampleFrame);
break;
case SynthEvent::kEventType_AllNotesOff :
group->AllNotesOff(inOffsetSampleFrame);
mNumActiveNotes = CountActiveNotes();
break;
case SynthEvent::kEventType_AllSoundOff :
group->AllSoundOff(inOffsetSampleFrame);
mNumActiveNotes = CountActiveNotes();
break;
case SynthEvent::kEventType_ResetAllControllers :
group->ResetAllControllers(inOffsetSampleFrame);
break;
}
}
else
{
SynthEvent *event = mEventQueue.WriteItem();
if (!event) return -1; // queue full
event->Set(inEventType, inGroupID, 0, 0, NULL);
mEventQueue.AdvanceWritePtr();
}
return noErr;
}