233 lines
6.3 KiB
C
233 lines
6.3 KiB
C
/*
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File: SynthNoteList.h
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Abstract: Part of CoreAudio Utility Classes
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Version: 1.1
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Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple
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Inc. ("Apple") in consideration of your agreement to the following
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terms, and your use, installation, modification or redistribution of
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this Apple software constitutes acceptance of these terms. If you do
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not agree with these terms, please do not use, install, modify or
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redistribute this Apple software.
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In consideration of your agreement to abide by the following terms, and
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subject to these terms, Apple grants you a personal, non-exclusive
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license, under Apple's copyrights in this original Apple software (the
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"Apple Software"), to use, reproduce, modify and redistribute the Apple
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Software, with or without modifications, in source and/or binary forms;
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provided that if you redistribute the Apple Software in its entirety and
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without modifications, you must retain this notice and the following
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text and disclaimers in all such redistributions of the Apple Software.
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Neither the name, trademarks, service marks or logos of Apple Inc. may
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be used to endorse or promote products derived from the Apple Software
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without specific prior written permission from Apple. Except as
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expressly stated in this notice, no other rights or licenses, express or
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implied, are granted by Apple herein, including but not limited to any
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patent rights that may be infringed by your derivative works or by other
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works in which the Apple Software may be incorporated.
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The Apple Software is provided by Apple on an "AS IS" basis. APPLE
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MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
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THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
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FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
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OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
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IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
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MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
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AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
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STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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Copyright (C) 2014 Apple Inc. All Rights Reserved.
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*/
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#ifndef __SynthNoteList__
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#define __SynthNoteList__
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#include "SynthNote.h"
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#if DEBUG
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#ifndef DEBUG_PRINT
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#define DEBUG_PRINT 0
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#endif
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#define USE_SANITY_CHECK 0
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#endif
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/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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struct SynthNoteList
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{
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SynthNoteList() : mState(kNoteState_Unset), mHead(0), mTail(0) {}
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bool NotEmpty() const { return mHead != NULL; }
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bool IsEmpty() const { return mHead == NULL; }
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void Empty() {
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#if USE_SANITY_CHECK
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SanityCheck();
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#endif
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mHead = mTail = NULL;
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}
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UInt32 Length() const {
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#if USE_SANITY_CHECK
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SanityCheck();
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#endif
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UInt32 length = 0;
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for (SynthNote* note = mHead; note; note = note->mNext)
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length++;
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return length;
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};
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void AddNote(SynthNote *inNote)
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{
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#if DEBUG_PRINT
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printf("AddNote(inNote=%p) to state: %lu\n", inNote, mState);
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#endif
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#if USE_SANITY_CHECK
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SanityCheck();
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#endif
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inNote->SetState(mState);
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inNote->mNext = mHead;
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inNote->mPrev = NULL;
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if (mHead) { mHead->mPrev = inNote; mHead = inNote; }
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else mHead = mTail = inNote;
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#if USE_SANITY_CHECK
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SanityCheck();
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#endif
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}
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void RemoveNote(SynthNote *inNote)
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{
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#if DEBUG_PRINT
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printf("RemoveNote(inNote=%p) from state: %lu\n", inNote, mState);
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#endif
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#if USE_SANITY_CHECK
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SanityCheck();
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#endif
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if (inNote->mPrev) inNote->mPrev->mNext = inNote->mNext;
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else mHead = inNote->mNext;
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if (inNote->mNext) inNote->mNext->mPrev = inNote->mPrev;
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else mTail = inNote->mPrev;
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inNote->mPrev = 0;
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inNote->mNext = 0;
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#if USE_SANITY_CHECK
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SanityCheck();
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#endif
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}
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void TransferAllFrom(SynthNoteList *inNoteList, UInt32 inFrame)
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{
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#if DEBUG_PRINT
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printf("TransferAllFrom: from state %lu into state %lu\n", inNoteList->mState, mState);
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#endif
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#if USE_SANITY_CHECK
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SanityCheck();
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inNoteList->SanityCheck();
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#endif
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if (!inNoteList->mTail) return;
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if (mState == kNoteState_Released)
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{
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for (SynthNote* note = inNoteList->mHead; note; note = note->mNext)
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{
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#if DEBUG_PRINT
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printf("TransferAllFrom: releasing note %p\n", note);
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#endif
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note->Release(inFrame);
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note->SetState(mState);
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}
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}
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else
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{
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for (SynthNote* note = inNoteList->mHead; note; note = note->mNext)
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{
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note->SetState(mState);
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}
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}
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inNoteList->mTail->mNext = mHead;
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if (mHead) mHead->mPrev = inNoteList->mTail;
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else mTail = inNoteList->mTail;
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mHead = inNoteList->mHead;
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inNoteList->mHead = NULL;
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inNoteList->mTail = NULL;
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#if USE_SANITY_CHECK
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SanityCheck();
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inNoteList->SanityCheck();
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#endif
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}
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SynthNote* FindOldestNote()
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{
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#if DEBUG_PRINT
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printf("FindOldestNote\n");
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#endif
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#if USE_SANITY_CHECK
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SanityCheck();
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#endif
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UInt64 minStartFrame = -1;
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SynthNote* oldestNote = NULL;
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for (SynthNote* note = mHead; note; note = note->mNext)
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{
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if (note->mAbsoluteStartFrame < minStartFrame)
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{
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oldestNote = note;
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minStartFrame = note->mAbsoluteStartFrame;
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}
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}
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return oldestNote;
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}
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SynthNote* FindMostQuietNote()
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{
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#if DEBUG_PRINT
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printf("FindMostQuietNote\n");
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#endif
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Float32 minAmplitude = 1e9f;
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UInt64 minStartFrame = -1;
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SynthNote* mostQuietNote = NULL;
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for (SynthNote* note = mHead; note; note = note->mNext)
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{
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Float32 amp = note->Amplitude();
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#if DEBUG_PRINT
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printf(" amp %g minAmplitude %g\n", amp, minAmplitude);
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#endif
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if (amp < minAmplitude)
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{
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mostQuietNote = note;
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minAmplitude = amp;
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minStartFrame = note->mAbsoluteStartFrame;
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}
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else if (amp == minAmplitude && note->mAbsoluteStartFrame < minStartFrame)
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{
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// use earliest start time as a tie breaker
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mostQuietNote = note;
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minStartFrame = note->mAbsoluteStartFrame;
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}
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}
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#if USE_SANITY_CHECK
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SanityCheck();
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#endif
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return mostQuietNote;
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}
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void SanityCheck() const;
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SynthNoteState mState;
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SynthNote * mHead;
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SynthNote * mTail;
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};
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/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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#endif
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