/*

Copyright (C) 2016 Apple Inc. All Rights Reserved.

See LICENSE.txt for this sample’s licensing information

Abstract:

Part of Core Audio AUInstrument Base Classes

*/

#include "SynthNote.h"

#include "SynthElement.h"

#include "AUInstrumentBase.h"

bool SynthNote::AttackNote(

            SynthPartElement *              inPart,

            SynthGroupElement *             inGroup,

            NoteInstanceID                  inNoteID, 

            UInt64                          inAbsoluteSampleFrame, 

            UInt32                          inOffsetSampleFrame, 

            const MusicDeviceNoteParams     &inParams)

{

#if DEBUG_PRINT

    printf("SynthNote::AttackNote %lu %lu abs frame %llu rel frame %lu\n", (UInt32)inGroup->GroupID(), (UInt32)inNoteID, inAbsoluteSampleFrame, inOffsetSampleFrame);

#endif

    mPart = inPart;

    mGroup = inGroup;

    mNoteID = inNoteID;

    mAbsoluteStartFrame = inAbsoluteSampleFrame;

    mRelativeStartFrame = inOffsetSampleFrame;

    mRelativeReleaseFrame = -1;

    mRelativeKillFrame = -1;

    mPitch = inParams.mPitch;

    mVelocity = inParams.mVelocity;

    return Attack(inParams);

}

void SynthNote::Reset()

{

    mPart = 0;

    mGroup = 0;

    mAbsoluteStartFrame = 0;

    mRelativeStartFrame = 0;

    mRelativeReleaseFrame = -1;

    mRelativeKillFrame = -1;

}

void SynthNote::Kill(UInt32 inFrame)

{

    mRelativeKillFrame = inFrame;

}

void SynthNote::Release(UInt32 inFrame)

{

    mRelativeReleaseFrame = inFrame;

}

void SynthNote::FastRelease(UInt32 inFrame)

{

    mRelativeReleaseFrame = inFrame;

}

double SynthNote::TuningA() const

{

    return 440.0;

}

double SynthNote::Frequency()

{

    return TuningA() * pow(2., (mPitch - 69. + GetPitchBend()) / 12.);

}

double SynthNote::SampleRate()

{

    return GetAudioUnit()->GetOutput(0)->GetStreamFormat().mSampleRate;

}

AUInstrumentBase* SynthNote::GetAudioUnit() const 

{ 

    return (AUInstrumentBase*)mGroup->GetAudioUnit(); 

}

Float32 SynthNote::GetGlobalParameter(AudioUnitParameterID inParamID) const 

{

    return mGroup->GetAudioUnit()->Globals()->GetParameter(inParamID);

}

void SynthNote::NoteEnded(UInt32 inFrame) 

{ 

    mGroup->NoteEnded(this, inFrame);

    mNoteID = 0xFFFFFFFF; 

}

float SynthNote::GetPitchBend() const 

{ 

    return mGroup->GetPitchBend(); 

}