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*/

#include "WaveformViewDemo.h"

#include <vecLib/vDSP.h>

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

COMPONENT_ENTRY(WaveformViewDemo)

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

//  WaveformViewDemo::WaveformViewDemo

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

WaveformViewDemo::WaveformViewDemo(AudioUnit component)

    : AUEffectBase(component)

{

    mAudioBuffer = NULL;

    mFetchingBufferList = NULL;

}

WaveformViewDemo::~WaveformViewDemo()

{

}

void WaveformViewDemo::Cleanup()

{

    if (mAudioBuffer) delete (mAudioBuffer);

    if (mFetchingBufferList) delete(mFetchingBufferList);

    mAudioBuffer = NULL;

    mFetchingBufferList = NULL;

}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

//  WaveformViewDemo::Initialize

//

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

OSStatus            WaveformViewDemo::Initialize()

{

    OSStatus result = AUEffectBase::Initialize();

    if(result == noErr )

    {

        AllocateBuffers();

    }

    return result;

}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

//  WaveformViewDemo::GetParameterValueStrings

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

OSStatus            WaveformViewDemo::GetParameterValueStrings(AudioUnitScope           inScope,

                                                                AudioUnitParameterID    inParameterID,

                                                                CFArrayRef *            outStrings)

{

    return kAudioUnitErr_InvalidProperty;

}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

//  WaveformViewDemo::GetParameterInfo

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

OSStatus            WaveformViewDemo::GetParameterInfo(AudioUnitScope           inScope,

                                                        AudioUnitParameterID    inParameterID,

                                                        AudioUnitParameterInfo  &outParameterInfo )

{

    OSStatus result = noErr;

    outParameterInfo.flags =    kAudioUnitParameterFlag_IsWritable

                        |       kAudioUnitParameterFlag_IsReadable;

    if (inScope == kAudioUnitScope_Global) {

        switch(inParameterID)

        {

             default:

                result = kAudioUnitErr_InvalidParameter;

                break;

            }

    } else {

        result = kAudioUnitErr_InvalidParameter;

    }

    return result;

}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

//  WaveformViewDemo::GetPropertyInfo

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

OSStatus            WaveformViewDemo::GetPropertyInfo (AudioUnitPropertyID  inID,

                                                        AudioUnitScope      inScope,

                                                        AudioUnitElement    inElement,

                                                        UInt32 &            outDataSize,

                                                        Boolean &           outWritable)

{

 if (inScope == kAudioUnitScope_Global) {

        switch (inID) {

            case kAudioUnitProperty_CocoaUI:

                outWritable = false;

                outDataSize = sizeof (AudioUnitCocoaViewInfo);

                return noErr;

            case kAudioUnitProperty_SampleTimeStamp:

                outWritable = false;

                outDataSize = sizeof(Float64*);

                return noErr;

            case kAudioUnitProperty_WaveformOverview:

                outWritable = true;

                outDataSize = sizeof(WaveformOverview);

                return noErr;

        }

    }

    return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);

}

void            WaveformViewDemo::GetWaveformOverview(WaveformOverview* data)

{   

    AudioBufferList *bufferList = &mFetchingBufferList->GetModifiableBufferList();

    UInt32 num = data->mNumDataPoints;

    SampleTime t = (SampleTime) data->mFetchStamp.mSampleTime;

    mAudioBuffer->Fetch(bufferList, num, t, false); 

    Float32* b = (Float32*) bufferList->mBuffers[data->mChannel].mData;

    memcpy(data->mOverview, b, num*sizeof(Float32));    

    vDSP_maxmgv(b, 1, &(data->mMax), num);

    vDSP_minmgv (b, 1,&(data->mMin), num);

#pragma warning we are pulling all the data but only need a certain channel

    data->mFetchStamp.mSampleTime += (Float64) num; 

}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

//  WaveformViewDemo::GetProperty

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

OSStatus            WaveformViewDemo::GetProperty(      AudioUnitPropertyID     inID,

                                                        AudioUnitScope          inScope,

                                                        AudioUnitElement        inElement,

                                                        void *                  outData )

{

    if (inScope == kAudioUnitScope_Global) {

        switch (inID) {

            case kAudioUnitProperty_CocoaUI:

            {

                // Look for a resource in the main bundle by name and type.

                CFBundleRef bundle = CFBundleGetBundleWithIdentifier( CFSTR("com.apple.demo.audiounit.WaveformViewDemo") );

                if (bundle == NULL) return fnfErr;

                CFURLRef bundleURL = CFBundleCopyResourceURL( bundle, 

                    CFSTR("WaveformViewDemoViewFactory"), 

                    CFSTR("bundle"), 

                    NULL);

                if (bundleURL == NULL) return fnfErr;

                CFStringRef className = CFSTR("WaveformViewDemoViewFactory");

                AudioUnitCocoaViewInfo cocoaInfo = { bundleURL, className };

                *((AudioUnitCocoaViewInfo *)outData) = cocoaInfo;

                return noErr;

            }

            case kAudioUnitProperty_WaveformOverview:

            {

                WaveformOverview *overview = (WaveformOverview*)outData;

                GetWaveformOverview(overview);

                return noErr;

            }

            case kAudioUnitProperty_SampleTimeStamp:

            {

                *(static_cast<Float64*>(outData)) =mRenderStamp.mSampleTime;        

                return noErr;

            }

        } //end switch

    }//end global if

    return AUEffectBase::GetProperty (inID, inScope, inElement, outData);

}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

//  WaveformViewDemo::SetProperty

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

OSStatus            WaveformViewDemo::  SetProperty(AudioUnitPropertyID         inID,

                                                    AudioUnitScope              inScope,

                                                    AudioUnitElement            inElement,

                                                    const void *                inData,

                                                    UInt32                      inDataSize)

{                                           

    return AUEffectBase::SetProperty (inID, inScope, inElement, inData, inDataSize);

}

void            WaveformViewDemo::AllocateBuffers()

{

    if (mAudioBuffer) delete (mAudioBuffer);

    mAudioBuffer = new CARingBuffer();

    mAudioBuffer->Allocate(GetNumberOfChannels(), sizeof(Float32), kDefaultValue_BufferSize); 

    // unlike the spectral buffers we write one number at a time, the spectral ones do entire analysis at a time

    CAStreamBasicDescription    bufClientDesc;      

    bufClientDesc.SetCanonical(GetNumberOfChannels(), false);

    bufClientDesc.mSampleRate = GetSampleRate();

    if (mFetchingBufferList) {

        mFetchingBufferList->DeallocateBuffers();

        delete(mFetchingBufferList);

    }

    mFetchingBufferList = CABufferList::New("fetch buffer", bufClientDesc );

    mFetchingBufferList->AllocateBuffers(sizeof(Float32) * kDefaultValue_BufferSize);

    memset (&mRenderStamp, 0, sizeof(AudioTimeStamp));

    mRenderStamp.mFlags = kAudioTimeStampSampleTimeValid;

}

OSStatus            WaveformViewDemo::ChangeStreamFormat(   AudioUnitScope                      inScope,

                                                            AudioUnitElement                    inElement,

                                                            const CAStreamBasicDescription &    inPrevFormat,

                                                            const CAStreamBasicDescription &    inNewFormat )

{   

    // we could change the default buffer size here because the sample rate may have changed or the

    // number of samples we are pulling may have changed

    return  AUBase::ChangeStreamFormat(inScope, inElement, inPrevFormat, inNewFormat);      

}

OSStatus    WaveformViewDemo::ProcessBufferLists(   AudioUnitRenderActionFlags &    ioActionFlags,

                                                    const AudioBufferList &         inBuffer,

                                                    AudioBufferList &               outBuffer,

                                                    UInt32                          inFramesToProcess )

{       

    SampleTime s = (SampleTime) (mRenderStamp.mSampleTime);

    mAudioBuffer->Store(&inBuffer, inFramesToProcess, s);

    mRenderStamp.mSampleTime += (Float64) inFramesToProcess;

    return AUEffectBase::ProcessBufferLists(ioActionFlags, inBuffer, outBuffer, inFramesToProcess);

}

#pragma mark ___KernelFunctions___

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

//  WaveformViewKernel::WaveformViewKernel()

//

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

WaveformViewKernel::WaveformViewKernel(AUEffectBase *inAudioUnit )

    : AUKernelBase(inAudioUnit)

{

    Reset();

}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

//  WaveformViewKernel::~WaveformViewKernel()

//

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

WaveformViewKernel::~WaveformViewKernel( )

{

}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

//  WaveformViewKernel::Reset()

//

//      It's very important to fully reset all filter state variables to their

//      initial settings here.  For delay/reverb effects, the delay buffers must

//      also be cleared here.

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

void        WaveformViewKernel::Reset()

{

}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

//  WaveformViewKernel::Process(int inFramesToProcess)

//

//      We process one non-interleaved stream at a time

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

void WaveformViewKernel::Process(   const Float32   *inSourceP,

                            Float32         *inDestP,

                            UInt32          inFramesToProcess,

                            UInt32          inNumChannels,  // for version 2 AudioUnits inNumChannels is always 1

                            bool &          ioSilence)

{

    // passthrough

    const Float32 *sourceP = inSourceP;

    Float32 *destP = inDestP;

    int n = inFramesToProcess;

    memcpy(destP, sourceP, n*sizeof(Float32));

}