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Diffstat (limited to 'distrho/src/CoreAudio106/AudioUnits/AUPublic/AUInstrumentBase/SynthNote.h')
| -rwxr-xr-x | distrho/src/CoreAudio106/AudioUnits/AUPublic/AUInstrumentBase/SynthNote.h | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/distrho/src/CoreAudio106/AudioUnits/AUPublic/AUInstrumentBase/SynthNote.h b/distrho/src/CoreAudio106/AudioUnits/AUPublic/AUInstrumentBase/SynthNote.h new file mode 100755 index 00000000..afb1730d --- /dev/null +++ b/distrho/src/CoreAudio106/AudioUnits/AUPublic/AUInstrumentBase/SynthNote.h @@ -0,0 +1,170 @@ +/* Copyright © 2007 Apple Inc. All Rights Reserved. + + 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. +*/ +#ifndef __SynthNote__ +#define __SynthNote__ + +#include <Carbon/Carbon.h> +#include <AudioUnit/AudioUnit.h> +#include <CoreAudio/CoreAudio.h> +#include "MusicDeviceBase.h" + +///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +enum { + kNoteState_Attacked = 0, + kNoteState_Sostenutoed = 1, + kNoteState_ReleasedButSostenutoed = 2, + kNoteState_ReleasedButSustained = 3, + kNoteState_Released = 4, + kNoteState_FastReleased = 5, + kNoteState_Free = 6, + kNumberOfActiveNoteStates = 5, + kNumberOfSoundingNoteStates = 6, + kNumberOfNoteStates = 7 +}; + +/* + This table describes the state transitions for SynthNotes + + EVENT CURRENT STATE NEW STATE + note on free attacked + note off attacked (and sustain on) released but sustained + note off attacked released + note off sostenutoed released but sostenutoed + sustain on -- no changes -- + sustain off released but sustained released + sostenuto on attacked sostenutoed + sostenuto off sostenutoed attacked + sostenuto off released but sostenutoed (and sustain on) released but sustained + sostenuto off released but sostenutoed released + end of note any state free + soft voice stealing any state fast released + hard voice stealing any state free + + soft voice stealing happens when there is a note on event and NumActiveNotes > MaxActiveNotes + hard voice stealing happens when there is a note on event and NumActiveNotes == NumNotes (no free notes) + voice stealing removes the quietest note in the highest numbered state that has sounding notes. +*/ + +class SynthGroupElement; +class SynthPartElement; +class AUInstrumentBase; + +struct SynthNote +{ + SynthNote() : + mPrev(0), mNext(0), mState(kNoteState_Free), + mRelativeStartFrame(0), + mRelativeReleaseFrame(-1), + mRelativeKillFrame(-1) + { + } + + virtual ~SynthNote() {} + + virtual void Reset(); + virtual void AttackNote( + SynthPartElement * inPart, + SynthGroupElement * inGroup, + NoteInstanceID inNoteID, + SInt64 inAbsoluteSampleFrame, + UInt32 inOffsetSampleFrame, + const MusicDeviceNoteParams &inParams + ); + + virtual OSStatus Render(UInt32 inNumFrames, AudioBufferList& inBufferList)=0; + virtual void Attack(const MusicDeviceNoteParams &inParams) = 0; + virtual void Kill(UInt32 inFrame); // voice is being stolen. + virtual void Release(UInt32 inFrame); + virtual void FastRelease(UInt32 inFrame); + virtual Float32 Amplitude() = 0; // used for finding quietest note for voice stealing. + + virtual void NoteEnded(UInt32 inFrame); + + SynthGroupElement* GetGroup() const { return mGroup; } + SynthPartElement* GetPart() const { return mPart; } + + AUInstrumentBase* GetAudioUnit() const; + + Float32 GetGlobalParameter(AudioUnitParameterID inParamID) const; + + NoteInstanceID GetNoteID() const { return mNoteID; } + UInt32 GetState() const { return mState; } + Boolean IsSounding() const { return mState < kNumberOfSoundingNoteStates; } + Boolean IsActive() const { return mState < kNumberOfActiveNoteStates; } + SInt64 GetAbsoluteStartFrame() const { return mAbsoluteStartFrame; } + SInt32 GetRelativeStartFrame() const { return mRelativeStartFrame; } + SInt32 GetRelativeReleaseFrame() const { return mRelativeReleaseFrame; } + SInt32 GetRelativeKillFrame() const { return mRelativeKillFrame; } + + void ListRemove() { mPrev = mNext = 0; } // only use when lists will be reset. + + float PitchBend() const; + double TuningA() const; + + virtual double Frequency(); // returns the frequency of note + pitch bend. + double SampleRate(); + +//private: +// friend class NoteList; + + // linked list pointers + SynthNote *mPrev; + SynthNote *mNext; + + SynthPartElement* mPart; + SynthGroupElement* mGroup; + + NoteInstanceID mNoteID; + UInt32 mState; + SInt64 mAbsoluteStartFrame; + SInt32 mRelativeStartFrame; + SInt32 mRelativeReleaseFrame; + SInt32 mRelativeKillFrame; + + Float32 mPitch; + Float32 mVelocity; +}; + +///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +#endif + |