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Diffstat (limited to 'libs/appleutility/CoreAudio/AudioUnits/AUPublic/AUInstrumentBase/SynthNoteList.h')
-rw-r--r-- | libs/appleutility/CoreAudio/AudioUnits/AUPublic/AUInstrumentBase/SynthNoteList.h | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/libs/appleutility/CoreAudio/AudioUnits/AUPublic/AUInstrumentBase/SynthNoteList.h b/libs/appleutility/CoreAudio/AudioUnits/AUPublic/AUInstrumentBase/SynthNoteList.h new file mode 100644 index 0000000000..47a3593018 --- /dev/null +++ b/libs/appleutility/CoreAudio/AudioUnits/AUPublic/AUInstrumentBase/SynthNoteList.h @@ -0,0 +1,232 @@ +/* + File: SynthNoteList.h + Abstract: Part of CoreAudio Utility Classes + Version: 1.1 + + 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) 2014 Apple Inc. All Rights Reserved. + +*/ +#ifndef __SynthNoteList__ +#define __SynthNoteList__ + +#include "SynthNote.h" + +#if DEBUG +#ifndef DEBUG_PRINT + #define DEBUG_PRINT 0 +#endif + #define USE_SANITY_CHECK 0 +#endif + +///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +struct SynthNoteList +{ + SynthNoteList() : mState(kNoteState_Unset), mHead(0), mTail(0) {} + + bool NotEmpty() const { return mHead != NULL; } + bool IsEmpty() const { return mHead == NULL; } + void Empty() { +#if USE_SANITY_CHECK + SanityCheck(); +#endif + mHead = mTail = NULL; + } + + UInt32 Length() const { +#if USE_SANITY_CHECK + SanityCheck(); +#endif + UInt32 length = 0; + for (SynthNote* note = mHead; note; note = note->mNext) + length++; + return length; + }; + + void AddNote(SynthNote *inNote) + { +#if DEBUG_PRINT + printf("AddNote(inNote=%p) to state: %lu\n", inNote, mState); +#endif +#if USE_SANITY_CHECK + SanityCheck(); +#endif + inNote->SetState(mState); + inNote->mNext = mHead; + inNote->mPrev = NULL; + + if (mHead) { mHead->mPrev = inNote; mHead = inNote; } + else mHead = mTail = inNote; +#if USE_SANITY_CHECK + SanityCheck(); +#endif + } + + void RemoveNote(SynthNote *inNote) + { +#if DEBUG_PRINT + printf("RemoveNote(inNote=%p) from state: %lu\n", inNote, mState); +#endif +#if USE_SANITY_CHECK + SanityCheck(); +#endif + if (inNote->mPrev) inNote->mPrev->mNext = inNote->mNext; + else mHead = inNote->mNext; + + if (inNote->mNext) inNote->mNext->mPrev = inNote->mPrev; + else mTail = inNote->mPrev; + + inNote->mPrev = 0; + inNote->mNext = 0; +#if USE_SANITY_CHECK + SanityCheck(); +#endif + } + + void TransferAllFrom(SynthNoteList *inNoteList, UInt32 inFrame) + { +#if DEBUG_PRINT + printf("TransferAllFrom: from state %lu into state %lu\n", inNoteList->mState, mState); +#endif +#if USE_SANITY_CHECK + SanityCheck(); + inNoteList->SanityCheck(); +#endif + if (!inNoteList->mTail) return; + + if (mState == kNoteState_Released) + { + for (SynthNote* note = inNoteList->mHead; note; note = note->mNext) + { +#if DEBUG_PRINT + printf("TransferAllFrom: releasing note %p\n", note); +#endif + note->Release(inFrame); + note->SetState(mState); + } + } + else + { + for (SynthNote* note = inNoteList->mHead; note; note = note->mNext) + { + note->SetState(mState); + } + } + + inNoteList->mTail->mNext = mHead; + + if (mHead) mHead->mPrev = inNoteList->mTail; + else mTail = inNoteList->mTail; + + mHead = inNoteList->mHead; + + inNoteList->mHead = NULL; + inNoteList->mTail = NULL; +#if USE_SANITY_CHECK + SanityCheck(); + inNoteList->SanityCheck(); +#endif + } + + SynthNote* FindOldestNote() + { +#if DEBUG_PRINT + printf("FindOldestNote\n"); +#endif +#if USE_SANITY_CHECK + SanityCheck(); +#endif + UInt64 minStartFrame = -1; + SynthNote* oldestNote = NULL; + for (SynthNote* note = mHead; note; note = note->mNext) + { + if (note->mAbsoluteStartFrame < minStartFrame) + { + oldestNote = note; + minStartFrame = note->mAbsoluteStartFrame; + } + } + return oldestNote; + } + + SynthNote* FindMostQuietNote() + { +#if DEBUG_PRINT + printf("FindMostQuietNote\n"); +#endif + Float32 minAmplitude = 1e9f; + UInt64 minStartFrame = -1; + SynthNote* mostQuietNote = NULL; + for (SynthNote* note = mHead; note; note = note->mNext) + { + Float32 amp = note->Amplitude(); +#if DEBUG_PRINT + printf(" amp %g minAmplitude %g\n", amp, minAmplitude); +#endif + if (amp < minAmplitude) + { + mostQuietNote = note; + minAmplitude = amp; + minStartFrame = note->mAbsoluteStartFrame; + } + else if (amp == minAmplitude && note->mAbsoluteStartFrame < minStartFrame) + { + // use earliest start time as a tie breaker + mostQuietNote = note; + minStartFrame = note->mAbsoluteStartFrame; + } + } +#if USE_SANITY_CHECK + SanityCheck(); +#endif + return mostQuietNote; + } + + void SanityCheck() const; + + SynthNoteState mState; + SynthNote * mHead; + SynthNote * mTail; +}; + +///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +#endif |