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AUPulseDetector.cpp
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AUPulseDetector.cpp
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/* Copyright © 2007 Apple Inc. All Rights Reserved.
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.
*/
#include "AUEffectBase.h"
#include "AUPulseDetectorVersion.h"
#include "AUPulseShared.h"
#if AU_DEBUG_DISPATCHER
#include "AUDebugDispatcher.h"
#endif
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#pragma mark ____AUPulseDetector
static const AUChannelInfo sChannels[1] = { {1, 1} };
enum {
kDoPulseDetection = 0,
kPulseRestTime = 1,
kPulseThreshold = 2,
kPulseLength = 3,
kWritePulseStats = 4
};
const static float kPulseThresholdDefault = 0.5;
const static float kPulseThresholdMin = 0.4;
const static float kPulseThresholdMax = 1.;
const static float kPulseLengthDefault = 8.;
const static float kPulseLengthMin = 4.;
const static float kPulseLengthMax = 32.;
const static float kPulseRestTimeDefault = 5;
const static float kPulseRestTimeMin = 1;
const static float kPulseRestTimeMax = 60;
const static float kDoPulseDetectionDefault = 0;
const static float kDoPulseDetectionMin = 0;
const static float kDoPulseDetectionMax = 1;
class AUPulseDetector : public AUEffectBase
{
public:
AUPulseDetector(AudioUnit component);
virtual ~AUPulseDetector ();
virtual AUKernelBase * NewKernel() { return new AUPulseDetectorKernel(this); }
virtual OSStatus GetPropertyInfo (AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
UInt32 & outDataSize,
Boolean & outWritable)
{
if (inScope == kAudioUnitScope_Global) {
switch (inID) {
case kAUPulseMetricsPropertyID:
outDataSize = sizeof (AUPulseMetrics);
outWritable = false;
return noErr;
default:
break;
}
}
return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
}
virtual OSStatus GetProperty( AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
void * outData );
virtual bool SupportsTail () { return true; }
virtual OSStatus SetParameter( AudioUnitParameterID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
Float32 inValue,
UInt32 inBufferOffsetInFrames);
virtual UInt32 SupportedNumChannels ( const AUChannelInfo** outInfo)
{
if (outInfo) *outInfo = sChannels;
return sizeof (sChannels) / sizeof (AUChannelInfo);
}
virtual OSStatus GetParameterInfo( AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
AudioUnitParameterInfo &outParameterInfo );
virtual int GetNumCustomUIComponents () { return 1; }
virtual void GetUIComponentDescs (ComponentDescription* inDescArray)
{
ComponentDescription desc;
desc.componentType = 'auvw';
desc.componentSubType = 'puls';
desc.componentManufacturer = 'appl';
desc.componentFlags = 0;
desc.componentFlagsMask = 0;
*inDescArray = desc;//{ 'auvw', 'puls', 'appl', 0, 0 };
}
virtual OSStatus Version() { return kAUPulseDetectorVersion; }
virtual OSStatus Render( AudioUnitRenderActionFlags &ioActionFlags,
const AudioTimeStamp & inTimeStamp,
UInt32 nFrames)
{
mRenderTime = inTimeStamp;
return AUEffectBase::Render (ioActionFlags, inTimeStamp, nFrames);
}
protected:
class AUPulseDetectorKernel : public AUKernelBase // most real work happens here
{
public:
AUPulseDetectorKernel(AUPulseDetector *inAudioUnit )
: AUKernelBase(inAudioUnit),
mParentObject (inAudioUnit)
{
Reset();
mParentObject->mChildObject = this;
}
virtual ~AUPulseDetectorKernel()
{
mParentObject->mChildObject = NULL;
}
// Required overides for the process method for this effect
// processes one channel of interleaved samples
virtual void Process( const Float32 *inSourceP,
Float32 *inDestP,
UInt32 inFramesToProcess,
UInt32 inNumChannels,
bool &ioSilence);
virtual void Reset ()
{
mWhichMode = kEstablishMode;
mTotalMeasurements = 0;
mTotalMeasurementsSquared = 0;
mNumMeasurements = 0;
mMaxTime = 0;
mMinTime = 0xFFFFFFFF;
mLastMeasurement = 0;
mLastFrames = 0;
mParentObject->ClearPulseTS();
}
Float64 SampleTime ()
{
return mParentObject->mRenderTime.mSampleTime;
}
public: //state variables...
enum {
kDetectMode,
kCleanMode,
kEstablishMode
};
UInt32 mWhichMode;
Float64 mPulseStartTime;
SInt32 mDoneClean;
Float64 mTotalMeasurements;
Float64 mTotalMeasurementsSquared;
UInt32 mLastMeasurement;
UInt32 mNumMeasurements;
UInt32 mMaxTime;
UInt32 mMinTime;
UInt32 mLastFrames;
bool mWasSuccessful;
AUPulseDetector* mParentObject;
};
AudioTimeStamp mRenderTime;
AUPulseDetectorKernel* mChildObject;
enum {
kPulseTSSize = 256
};
struct PulseTS {
Float64 start;
Float64 length;
};
PulseTS *mPulseTimeStats;
UInt32 mCurrentPTSIndex;
public:
void ClearPulseTS ()
{
memset (mPulseTimeStats, 0, (sizeof(PulseTS) * kPulseTSSize));
mCurrentPTSIndex = 0;
}
void WritePulseTS ();
void DetectedPulse (Float64 startTime, Float64 duration)
{
mPulseTimeStats[mCurrentPTSIndex].start = startTime;
mPulseTimeStats[mCurrentPTSIndex].length = duration;
mCurrentPTSIndex = (++mCurrentPTSIndex % kPulseTSSize);
PropertyChanged (kAUPulseMetricsPropertyID, kAudioUnitScope_Global, 0);
}
};
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
COMPONENT_ENTRY(AUPulseDetector)
#pragma mark ____AUPulseDetector
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// AUPulseDetector::AUPulseDetector
//
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
AUPulseDetector::AUPulseDetector(AudioUnit component)
: AUEffectBase(component),
mChildObject(NULL)
{
CreateElements();
CAStreamBasicDescription monoDesc;
monoDesc.SetAUCanonical (1, false);
monoDesc.mSampleRate = 44100.;
GetOutput(0)->SetStreamFormat(monoDesc);
GetInput(0)->SetStreamFormat(monoDesc);
Globals()->UseIndexedParameters (5);
Globals()->SetParameter (kPulseThreshold, kPulseThresholdDefault);
Globals()->SetParameter (kPulseLength, kPulseLengthDefault);
Globals()->SetParameter (kPulseRestTime, kPulseRestTimeDefault);
Globals()->SetParameter (kDoPulseDetection, kDoPulseDetectionDefault);
Globals()->SetParameter (kWritePulseStats, 0);
mPulseTimeStats = new PulseTS[kPulseTSSize];
#if AU_DEBUG_DISPATCHER
mDebugDispatcher = new AUDebugDispatcher (this);
#endif
}
AUPulseDetector::~AUPulseDetector ()
{
delete [] mPulseTimeStats;
#if AU_DEBUG_DISPATCHER
delete mDebugDispatcher;
#endif
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// AUPulseDetector::GetParameterInfo
//
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
OSStatus AUPulseDetector::GetParameterInfo( AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
AudioUnitParameterInfo &outParameterInfo )
{
outParameterInfo.flags = kAudioUnitParameterFlag_IsWritable
+ kAudioUnitParameterFlag_IsReadable;
if (inScope == kAudioUnitScope_Global)
{
switch(inParameterID)
{
case kPulseLength:
AUBase::FillInParameterName (outParameterInfo, CFSTR("Pulse Length"), false);
AUBase::HasClump (outParameterInfo, 2);
outParameterInfo.unit = kAudioUnitParameterUnit_SampleFrames;
outParameterInfo.minValue = kPulseLengthMin;
outParameterInfo.maxValue = kPulseLengthMax;
outParameterInfo.defaultValue = kPulseLengthDefault;
return noErr;
case kPulseThreshold:
AUBase::FillInParameterName (outParameterInfo, CFSTR("Pulse Threshold"), false);
AUBase::HasClump (outParameterInfo, 2);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = kPulseThresholdMin;
outParameterInfo.maxValue = kPulseThresholdMax;
outParameterInfo.defaultValue = kPulseThresholdDefault;
return noErr;
case kPulseRestTime:
AUBase::FillInParameterName (outParameterInfo, CFSTR("Time Between Pulses"), false);
AUBase::HasClump (outParameterInfo, 2);
outParameterInfo.unit = kAudioUnitParameterUnit_Seconds;
outParameterInfo.minValue = kPulseRestTimeMin;
outParameterInfo.maxValue = kPulseRestTimeMax;
outParameterInfo.defaultValue = kPulseRestTimeDefault;
return noErr;
case kDoPulseDetection:
AUBase::FillInParameterName (outParameterInfo, CFSTR("Do Pulse Detection"), false);
AUBase::HasClump (outParameterInfo, 1);
outParameterInfo.unit = kAudioUnitParameterUnit_Boolean;
outParameterInfo.minValue = kDoPulseDetectionMin;
outParameterInfo.maxValue = kDoPulseDetectionMax;
outParameterInfo.defaultValue = kDoPulseDetectionDefault;
return noErr;
case kWritePulseStats:
outParameterInfo.flags = kAudioUnitParameterFlag_IsWritable;
AUBase::FillInParameterName (outParameterInfo, CFSTR("Write Pulse Time Stamps"), false);
AUBase::HasClump (outParameterInfo, 3);
outParameterInfo.unit = kAudioUnitParameterUnit_Boolean;
outParameterInfo.minValue = 0;
outParameterInfo.maxValue = 1;
outParameterInfo.defaultValue = 0;
return noErr;
}
}
return AUEffectBase::GetParameterInfo (inScope, inParameterID, outParameterInfo);
}
OSStatus AUPulseDetector::GetProperty( AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
void * outData )
{
if (inScope == kAudioUnitScope_Global)
{
switch (inID)
{
case kAUPulseMetricsPropertyID:
{
if (!mChildObject) return kAudioUnitErr_InvalidPropertyValue; //we don't have any data
AUPulseMetrics metrics;
AUPulseDetectorKernel &child = *mChildObject;
metrics.isValid = child.mWasSuccessful;
if (metrics.isValid)
{
metrics.min = child.mMinTime;
metrics.max = child.mMaxTime;
UInt32 numMeasures = child.mNumMeasurements;
UInt32 lastMeasure = child.mLastMeasurement;
if (numMeasures > 1) {
Float64 sumMeasures = child.mTotalMeasurements;
Float64 sumMeasuresSquared = child.mTotalMeasurementsSquared;
metrics.mean = sumMeasures / numMeasures;
// stdDev = (sum of Xsquared -((sum of X)*(sum of X)/N)) / (N-1))
metrics.stdDev = sqrt ((sumMeasuresSquared - ((sumMeasures * sumMeasures) / numMeasures)) / (numMeasures-1));
} else {
metrics.mean = lastMeasure;
metrics.stdDev = 0;
}
metrics.numMeasurements = numMeasures;
metrics.lastPulseTime = lastMeasure;
metrics.numFrames = child.mLastFrames;
} else {
metrics.min = metrics.max = 0;
metrics.mean = metrics.stdDev = 0;
metrics.numMeasurements = 0;
metrics.lastPulseTime = metrics.numFrames = 0;
}
*((AUPulseMetrics*)outData) = metrics;
}
return noErr;
default:
break;
}
}
return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
}
OSStatus AUPulseDetector::SetParameter( AudioUnitParameterID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
Float32 inValue,
UInt32 inBufferOffsetInFrames)
{
if (inID == kWritePulseStats && inValue > 0.5) {
WritePulseTS();
return noErr;
}
bool wasOff = false;
if (inID == kPulseRestTime && mChildObject) {
mChildObject->mDoneClean = 0;
mChildObject->mWhichMode = AUPulseDetector::AUPulseDetectorKernel::kCleanMode;
}
if (inID == kDoPulseDetection)
wasOff = GetParameter (kDoPulseDetection) == 0.0;
OSStatus result = AUBase::SetParameter (inID, inScope, inElement, inValue, inBufferOffsetInFrames);
// establish a new pulse
if (inID == kDoPulseDetection && mChildObject) {
if (GetParameter (kDoPulseDetection) && wasOff)
mChildObject->mWhichMode = AUPulseDetector::AUPulseDetectorKernel::kEstablishMode;
}
return result;
}
void AUPulseDetector::WritePulseTS ()
{
static int currentWriteFile = 1;
int index = mCurrentPTSIndex;
if (index == 0) {
if (mPulseTimeStats[0].length == 0) {
printf ("No pulse stats to write\n");
return;
}
index = kPulseTSSize;
}
static char str[1024];
sprintf (str, "/tmp/au-pulse-ts-%d.txt", currentWriteFile++);
FILE * pFile = fopen (str,"wt");
if (pFile != NULL) {
printf ("Writing %d stats to %s\n", index, str);
fprintf (pFile, "Start Time (Samples)\tDuration\n");
for (int i = 0; i < index; ++i) {
fprintf (pFile, "%.0f\t%.0f\n", mPulseTimeStats[i].start, mPulseTimeStats[i].length);
}
fclose (pFile);
} else
printf ("Can't create file:%s\n", str);
ClearPulseTS();
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#pragma mark ____AUPulseDetectorKernel
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// AUPulseDetector::AUPulseDetectorKernel::Process
//
// pass-through audio
// do spike detection
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void AUPulseDetector::AUPulseDetectorKernel::Process(const Float32 *inSourceP,
Float32 *inDestP,
UInt32 inFramesToProcess,
UInt32 inNumChannels,
bool &ioSilence )
{
if (GetParameter (kDoPulseDetection) == 0) {
memset (inDestP, 0, (inFramesToProcess * sizeof(Float32)));
return;
}
switch (mWhichMode)
{
case kDetectMode:
{
Float64 now = SampleTime();
Float64 sampleRate = GetSampleRate();
if ((now - mPulseStartTime) > (sampleRate * GetParameter (kPulseRestTime))) {
mDoneClean = 0;
mWhichMode = kCleanMode;
mWasSuccessful = false;
mParentObject->PropertyChanged (kAUPulseMetricsPropertyID, kAudioUnitScope_Global, 0);
break;
}
float pulseThreshold = GetParameter (kPulseThreshold);
for (unsigned int i = 0; i < inFramesToProcess; ++i)
{
Float32 inputSample = inSourceP[i];
if(fabs(inputSample) >= pulseThreshold) {
mLastMeasurement = UInt32(now + i - mPulseStartTime);
mTotalMeasurements += mLastMeasurement;
mTotalMeasurementsSquared += pow (mLastMeasurement, 2);
mNumMeasurements++;
if (mLastMeasurement > mMaxTime)
mMaxTime = mLastMeasurement;
if (mLastMeasurement < mMinTime)
mMinTime = mLastMeasurement;
mDoneClean = 0;
mWhichMode = kCleanMode;
mLastFrames = inFramesToProcess;
mWasSuccessful = true;
mParentObject->DetectedPulse (mPulseStartTime, mLastMeasurement);
break;
}
}
memset (inDestP, 0, (inFramesToProcess * sizeof(Float32)));
}
break;
case kCleanMode:
{
if (mDoneClean == 0) {
float secs = GetParameter (kPulseRestTime);
mDoneClean = SInt32(secs * GetSampleRate());
}
memset (inDestP, 0, (inFramesToProcess * sizeof(Float32)));
ioSilence = true;
mDoneClean -= inFramesToProcess;
if (mDoneClean <= 0)
mWhichMode = kEstablishMode;
}
break;
case kEstablishMode:
{
memset (inDestP, 0, (inFramesToProcess * sizeof(Float32)));
unsigned int pulseLength = (unsigned int)GetParameter (kPulseLength);
if (pulseLength > inFramesToProcess)
pulseLength = inFramesToProcess;
for (unsigned int i = (inFramesToProcess - pulseLength); i < inFramesToProcess; ++i)
inDestP[i] = 1.0;
ioSilence = false;
mWhichMode = kDetectMode;
mPulseStartTime = SampleTime() + inFramesToProcess - pulseLength;
}
break;
}
}