Retired Document
Important: This sample code may not represent best practices for current development. The project may use deprecated symbols and illustrate technologies and techniques that are no longer recommended.
Relevant replacement documents include:
AUPublic/AUInstrumentBase/AUInstrumentBase.cpp
/* |
File: AUInstrumentBase.cpp |
Abstract: AUInstrumentBase.h |
Version: 1.2 |
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple |
Inc. ("Apple") in consideration of your agreement to the following |
terms, and your use, installation, modification or redistribution of |
this Apple software constitutes acceptance of these terms. If you do |
not agree with these terms, please do not use, install, modify or |
redistribute this Apple software. |
In consideration of your agreement to abide by the following terms, and |
subject to these terms, Apple grants you a personal, non-exclusive |
license, under Apple's copyrights in this original Apple software (the |
"Apple Software"), to use, reproduce, modify and redistribute the Apple |
Software, with or without modifications, in source and/or binary forms; |
provided that if you redistribute the Apple Software in its entirety and |
without modifications, you must retain this notice and the following |
text and disclaimers in all such redistributions of the Apple Software. |
Neither the name, trademarks, service marks or logos of Apple Inc. may |
be used to endorse or promote products derived from the Apple Software |
without specific prior written permission from Apple. Except as |
expressly stated in this notice, no other rights or licenses, express or |
implied, are granted by Apple herein, including but not limited to any |
patent rights that may be infringed by your derivative works or by other |
works in which the Apple Software may be incorporated. |
The Apple Software is provided by Apple on an "AS IS" basis. APPLE |
MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION |
THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS |
FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND |
OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS. |
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL |
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, |
MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED |
AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), |
STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE |
POSSIBILITY OF SUCH DAMAGE. |
Copyright (C) 2012 Apple Inc. All Rights Reserved. |
*/ |
#include "AUInstrumentBase.h" |
#include "AUMIDIDefs.h" |
#if DEBUG |
#define DEBUG_PRINT 0 |
#define DEBUG_PRINT_NOTE 0 |
#define DEBUG_PRINT_RENDER 0 |
#endif |
//////////////////////////////////////////////////////////////////////////////////////////////////////////// |
const UInt32 kEventQueueSize = 1024; |
AUInstrumentBase::AUInstrumentBase( |
AudioComponentInstance inInstance, |
UInt32 numInputs, |
UInt32 numOutputs, |
UInt32 numGroups, |
UInt32 numParts) |
: MusicDeviceBase(inInstance, numInputs, numOutputs, numGroups), |
mAbsoluteSampleFrame(0), |
mEventQueue(kEventQueueSize), |
mNumNotes(0), |
mNumActiveNotes(0), |
mMaxActiveNotes(0), |
mNotes(0), |
mNoteSize(0), |
mInitNumPartEls(numParts) |
{ |
#if DEBUG_PRINT |
printf("new AUInstrumentBase\n"); |
#endif |
mFreeNotes.mState = kNoteState_Free; |
SetWantsRenderThreadID(true); |
} |
AUInstrumentBase::~AUInstrumentBase() |
{ |
#if DEBUG_PRINT |
printf("delete AUInstrumentBase\n"); |
#endif |
} |
AUElement * AUInstrumentBase::CreateElement(AudioUnitScope inScope, AudioUnitElement element) |
{ |
switch (inScope) |
{ |
case kAudioUnitScope_Group: |
return new SynthGroupElement(this, element, new MidiControls); |
case kAudioUnitScope_Part: |
return new SynthPartElement (this, element); |
} |
return MusicDeviceBase::CreateElement(inScope, element); |
} |
void AUInstrumentBase::CreateExtendedElements() |
{ |
Parts().Initialize(this, kAudioUnitScope_Part, mInitNumPartEls); |
} |
AUScope * AUInstrumentBase::GetScopeExtended (AudioUnitScope inScope) |
{ |
if (inScope == kAudioUnitScope_Part) |
return &mPartScope; |
return NULL; |
} |
void AUInstrumentBase::SetNotes(UInt32 inNumNotes, UInt32 inMaxActiveNotes, SynthNote* inNotes, UInt32 inNoteDataSize) |
{ |
#if DEBUG_PRINT_NOTE |
printf("AUInstrumentBase::SetNotes %d %d %p %d\n", inNumNotes, inMaxActiveNotes, inNotes, inNoteDataSize); |
#endif |
mNumNotes = inNumNotes; |
mMaxActiveNotes = inMaxActiveNotes; |
mNoteSize = inNoteDataSize; |
mNotes = inNotes; |
for (UInt32 i=0; i<mNumNotes; ++i) |
{ |
SynthNote *note = GetNote(i); |
note->Reset(); |
mFreeNotes.AddNote(note); |
} |
} |
UInt32 AUInstrumentBase::CountActiveNotes() |
{ |
// debugging tool. |
UInt32 sum = 0; |
for (UInt32 i=0; i<mNumNotes; ++i) |
{ |
SynthNote *note = GetNote(i); |
if (note->GetState() <= kNoteState_Released) |
sum++; |
} |
return sum; |
} |
void AUInstrumentBase::AddFreeNote(SynthNote* inNote) |
{ |
// Fast-released notes are already considered inactive and have already decr'd the active count |
if (inNote->GetState() != kNoteState_FastReleased) { |
DecNumActiveNotes(); |
} |
#if DEBUG_PRINT_NOTE |
else { |
printf("AUInstrumentBase::AddFreeNote: adding fast-released note %p\n", inNote); |
} |
printf("AUInstrumentBase::AddFreeNote (%p) mNumActiveNotes %lu\n", inNote, mNumActiveNotes); |
#endif |
mFreeNotes.AddNote(inNote); |
} |
OSStatus AUInstrumentBase::Initialize() |
{ |
/* |
TO DO: |
Currently ValidFormat will check and validate that the num channels is not being |
changed if the AU doesn't support the SupportedNumChannels property - which is correct |
What needs to happen here is that IFF the AU does support this property, (ie, the AU |
can be configured to have different num channels than its original configuration) then |
the state of the AU at Initialization needs to be validated. |
This is work still to be done - see AUEffectBase for the kind of logic that needs to be applied here |
*/ |
// override to call SetNotes |
mNoteIDCounter = 128; // reset this every time we initialise |
mAbsoluteSampleFrame = 0; |
return noErr; |
} |
void AUInstrumentBase::Cleanup() |
{ |
} |
OSStatus 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 MusicDeviceBase::Reset(inScope, inElement); |
} |
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(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::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; |
} |
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
// AUInstrumentBase::ValidFormat |
// |
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
bool AUInstrumentBase::ValidFormat( AudioUnitScope inScope, |
AudioUnitElement inElement, |
const CAStreamBasicDescription & inNewFormat) |
{ |
// if the AU supports this, then we should just let this go through to the Init call |
if (SupportedNumChannels (NULL)) |
return MusicDeviceBase::ValidFormat(inScope, inElement, inNewFormat); |
bool isGood = MusicDeviceBase::ValidFormat (inScope, inElement, inNewFormat); |
if (!isGood) return false; |
// if we get to here, then the basic criteria is that the |
// num channels cannot change on an existing bus |
AUIOElement *el = GetIOElement (inScope, inElement); |
return (el->GetStreamFormat().NumberChannels() == inNewFormat.NumberChannels()); |
} |
bool AUInstrumentBase::StreamFormatWritable( AudioUnitScope scope, |
AudioUnitElement element) |
{ |
return IsInitialized() ? false : true; |
} |
OSStatus AUInstrumentBase::RealTimeStartNote( SynthGroupElement *inGroup, |
NoteInstanceID inNoteInstanceID, |
UInt32 inOffsetSampleFrame, |
const MusicDeviceNoteParams &inParams) |
{ |
return noErr; |
} |
SynthPartElement * AUInstrumentBase::GetPartElement (AudioUnitElement inPartElement) |
{ |
AUScope & parts = Parts(); |
unsigned int numEls = parts.GetNumberOfElements(); |
for (unsigned int i = 0; i < numEls; ++i) { |
SynthPartElement* el = reinterpret_cast<SynthPartElement*>(parts.GetElement(i)); |
if (el->GetIndex() == inPartElement) { |
return el; |
} |
} |
return NULL; |
} |
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::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::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); |
} |
OSStatus AUInstrumentBase::StartNote( MusicDeviceInstrumentID inInstrument, |
MusicDeviceGroupID inGroupID, |
NoteInstanceID * outNoteInstanceID, |
UInt32 inOffsetSampleFrame, |
const MusicDeviceNoteParams &inParams) |
{ |
OSStatus err = noErr; |
NoteInstanceID noteID; |
if (outNoteInstanceID) { |
noteID = NextNoteID(); |
*outNoteInstanceID = noteID; |
} else |
noteID = (UInt32)inParams.mPitch; |
#if DEBUG_PRINT |
printf("AUInstrumentBase::StartNote ch %u, key %u, offset %u\n", inGroupID, (unsigned) inParams.mPitch, inOffsetSampleFrame); |
#endif |
if (InRenderThread ()) |
{ |
err = RealTimeStartNote( |
GetElForGroupID(inGroupID), |
noteID, |
inOffsetSampleFrame, |
inParams); |
} |
else |
{ |
SynthEvent *event = mEventQueue.WriteItem(); |
if (!event) return -1; // queue full |
event->Set( |
SynthEvent::kEventType_NoteOn, |
inGroupID, |
noteID, |
inOffsetSampleFrame, |
&inParams |
); |
mEventQueue.AdvanceWritePtr(); |
} |
return err; |
} |
OSStatus AUInstrumentBase::StopNote( MusicDeviceGroupID inGroupID, |
NoteInstanceID inNoteInstanceID, |
UInt32 inOffsetSampleFrame) |
{ |
#if DEBUG_PRINT |
printf("AUInstrumentBase::StopNote ch %u, id %u, offset %u\n", (unsigned)inGroupID, (unsigned)inNoteInstanceID, inOffsetSampleFrame); |
#endif |
OSStatus err = noErr; |
if (InRenderThread ()) |
{ |
err = RealTimeStopNote( |
inGroupID, |
inNoteInstanceID, |
inOffsetSampleFrame); |
} |
else |
{ |
SynthEvent *event = mEventQueue.WriteItem(); |
if (!event) return -1; // queue full |
event->Set( |
SynthEvent::kEventType_NoteOff, |
inGroupID, |
inNoteInstanceID, |
inOffsetSampleFrame, |
NULL |
); |
mEventQueue.AdvanceWritePtr(); |
} |
return err; |
} |
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; |
} |
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::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::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::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; |
} |
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::HandleResetAllControllers( UInt8 inChannel) |
{ |
return SendPedalEvent (inChannel, SynthEvent::kEventType_ResetAllControllers, 0); |
} |
OSStatus AUInstrumentBase::HandleAllNotesOff( UInt8 inChannel) |
{ |
return SendPedalEvent (inChannel, SynthEvent::kEventType_AllNotesOff, 0); |
} |
OSStatus AUInstrumentBase::HandleAllSoundOff( UInt8 inChannel) |
{ |
return SendPedalEvent (inChannel, SynthEvent::kEventType_AllSoundOff, 0); |
} |
SynthNote* AUInstrumentBase::GetAFreeNote(UInt32 inFrame) |
{ |
#if DEBUG_PRINT_NOTE |
printf("AUInstrumentBase::GetAFreeNote: %lu available\n", mFreeNotes.Length()); |
#endif |
SynthNote *note = mFreeNotes.mHead; |
if (note) |
{ |
mFreeNotes.RemoveNote(note); |
return note; |
} |
return VoiceStealing(inFrame, true); |
} |
SynthNote* AUInstrumentBase::VoiceStealing(UInt32 inFrame, bool inKillIt) |
{ |
#if DEBUG_PRINT_NOTE |
printf("AUInstrumentBase::VoiceStealing\n"); |
#endif |
// free list was empty so we need to kill a note. |
UInt32 startState = inKillIt ? kNoteState_FastReleased : kNoteState_Released; |
for (UInt32 i = startState; i <= startState; --i) |
{ |
#if DEBUG_PRINT_NOTE |
printf(" checking state %d...\n", i); |
#endif |
UInt32 numGroups = Groups().GetNumberOfElements(); |
for (UInt32 j = 0; j < numGroups; ++j) |
{ |
SynthGroupElement *group = (SynthGroupElement*)Groups().GetElement(j); |
#if DEBUG_PRINT_NOTE |
printf("\tsteal group %d size %d\n", j, group->mNoteList[i].Length()); |
#endif |
if (group->mNoteList[i].NotEmpty()) { |
#if DEBUG_PRINT_NOTE |
printf("\t-- not empty\n"); |
#endif |
SynthNote *note = group->mNoteList[i].FindMostQuietNote(); |
if (inKillIt) { |
#if DEBUG_PRINT_NOTE |
printf("\t--=== KILL ===---\n"); |
#endif |
note->Kill(inFrame); |
group->mNoteList[i].RemoveNote(note); |
if (i != kNoteState_FastReleased) |
DecNumActiveNotes(); |
return note; |
} else { |
#if DEBUG_PRINT_NOTE |
printf("\t--=== FAST RELEASE ===---\n"); |
#endif |
group->mNoteList[i].RemoveNote(note); |
note->FastRelease(inFrame); |
group->mNoteList[kNoteState_FastReleased].AddNote(note); |
DecNumActiveNotes(); // kNoteState_FastReleased counts as inactive for voice stealing purposes. |
return NULL; |
} |
} |
} |
} |
#if DEBUG_PRINT_NOTE |
printf("no notes to steal????\n"); |
#endif |
return NULL; // It should be impossible to get here. It means there were no notes to kill in any state. |
} |
//////////////////////////////////////////////////////////////////////////////////////////////////////////// |
AUMonotimbralInstrumentBase::AUMonotimbralInstrumentBase( |
AudioComponentInstance inInstance, |
UInt32 numInputs, |
UInt32 numOutputs, |
UInt32 numGroups, |
UInt32 numParts) |
: AUInstrumentBase(inInstance, numInputs, numOutputs, numGroups, numParts) |
{ |
} |
OSStatus AUMonotimbralInstrumentBase::RealTimeStartNote( |
SynthGroupElement *inGroup, |
NoteInstanceID inNoteInstanceID, |
UInt32 inOffsetSampleFrame, |
const MusicDeviceNoteParams &inParams) |
{ |
#if DEBUG_PRINT_RENDER |
printf("AUMonotimbralInstrumentBase::RealTimeStartNote %d\n", inNoteInstanceID); |
#endif |
if (NumActiveNotes() + 1 > MaxActiveNotes()) |
{ |
VoiceStealing(inOffsetSampleFrame, false); |
} |
SynthNote *note = GetAFreeNote(inOffsetSampleFrame); |
if (!note) return -1; |
SynthPartElement *part = GetPartElement (0); // Only one part for monotimbral |
IncNumActiveNotes(); |
inGroup->NoteOn(note, part, inNoteInstanceID, inOffsetSampleFrame, inParams); |
return noErr; |
} |
//////////////////////////////////////////////////////////////////////////////////////////////////////////// |
OSStatus AUMultitimbralInstrumentBase::GetPropertyInfo(AudioUnitPropertyID inID, |
AudioUnitScope inScope, |
AudioUnitElement inElement, |
UInt32 & outDataSize, |
Boolean & outWritable) |
{ |
OSStatus result = noErr; |
switch (inID) |
{ |
#if !TARGET_OS_IPHONE |
case kMusicDeviceProperty_PartGroup: |
if (inScope != kAudioUnitScope_Part) return kAudioUnitErr_InvalidScope; |
outDataSize = sizeof(UInt32); |
outWritable = true; |
break; |
#endif |
default: |
result = AUInstrumentBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable); |
} |
return result; |
} |
OSStatus AUMultitimbralInstrumentBase::GetProperty( AudioUnitPropertyID inID, |
AudioUnitScope inScope, |
AudioUnitElement inElement, |
void * outData) |
{ |
OSStatus result = noErr; |
switch (inID) |
{ |
#if !TARGET_OS_IPHONE |
case kMusicDeviceProperty_PartGroup: |
if (inScope != kAudioUnitScope_Group) return kAudioUnitErr_InvalidScope; |
// ?? |
return -1; //unimpl |
break; |
#endif |
default: |
result = AUInstrumentBase::GetProperty (inID, inScope, inElement, outData); |
} |
return result; |
} |
OSStatus AUMultitimbralInstrumentBase::SetProperty( AudioUnitPropertyID inID, |
AudioUnitScope inScope, |
AudioUnitElement inElement, |
const void * inData, |
UInt32 inDataSize) |
{ |
OSStatus result = noErr; |
switch (inID) |
{ |
#if !TARGET_OS_IPHONE |
case kMusicDeviceProperty_PartGroup: |
if (inScope != kAudioUnitScope_Group) return kAudioUnitErr_InvalidScope; |
// ?? |
return -1; //unimpl |
break; |
#endif |
default: |
result = MusicDeviceBase::SetProperty (inID, inScope, inElement, inData, inDataSize); |
} |
return result; |
} |
//////////////////////////////////////////////////////////////////////////////////////////////////////////// |
Copyright © 2012 Apple Inc. All Rights Reserved. Terms of Use | Privacy Policy | Updated: 2012-10-10