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/*
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
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