ITASoundSampleImpl.cpp 3.24 KB
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/*
 *      +------------------+
 *  --->| ITA Sampler      |--->
 *  --->| o o o o      /// |--->
 *      +------------------+
 *
 *  ITASampler ist eine C++ Bibliothek die einen Sound sampler zur wavetable-basierten
 *  Klangsynthese bereitstellt. Der Begriff "sampler" bezieht sich hier auf den Terminus
 *  aus der Musikproduktion und nicht auf Abtastwerte.
 *
 *  Datei:		ITASoundSamplerImpl.cpp
 *  Zweck:		Implementierungsklasse des sound samplers
 *  Autoren:	Frank Wefers (Frank.Wefers@akustik.rwth-aachen.de)
 *  CVS-Datum:	$Id: ITASoundSampleImpl.cpp,v 1.1 2008-12-10 14:15:03 fwefers Exp $
 *
 *  (c) Copyright Institut fr Technische Akustik (ITA) RWTH Aachen, 2008
 */
#include "ITASoundSampleImpl.h"

#include <ITAAudiofileReader.h>
#include <ITAException.h>
#include <ITAFunctors.h>

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#include <cstring>
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#include <algorithm>

ITASoundSampleImpl::ITASoundSampleImpl(const std::string& sFilename, int iMaxNumberOfChannels, double dRequiredSamplerate, std::string sName)
: m_sName(sName), m_sFilename(sFilename), m_iLength(0), m_iPlaybackRefCount(0), m_bOriginFile(true) {
	ITAAudiofileReader* pReader = ITAAudiofileReader::create(sFilename);

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	if (pReader->getDomain() != ITADomain::ITA_TIME_DOMAIN) {
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		delete pReader;
		ITA_EXCEPT1(INVALID_PARAMETER, "Audiofile is not in time domain");
	}

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	if (pReader->getNumberOfChannels() > iMaxNumberOfChannels) {
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		delete pReader;
		ITA_EXCEPT1(INVALID_PARAMETER, "Audiofile has too much channels");
	}

	if (pReader->getSamplerate() != dRequiredSamplerate) {
		delete pReader;
		ITA_EXCEPT1(INVALID_PARAMETER, "Audiofile has invalid sampling rate");
	}

	m_iLength = (signed) pReader->getLength();
	m_vpData = pReader->read(pReader->getLength());
	
	delete pReader;
}

ITASoundSampleImpl::ITASoundSampleImpl(const float** ppfChannelData, int iNumberOfChannels, int iLength, std::string sName)
: m_sName(sName), m_iLength(iLength), m_iPlaybackRefCount(0), m_bOriginFile(false) {
	
	// Kopie der Daten erzeugen
	m_vpData.resize(iNumberOfChannels, NULL);
	for (int i=0; i<iNumberOfChannels; i++) {
		m_vpData[i] = new float[iLength];
		memcpy(m_vpData[i], ppfChannelData[i], iLength*sizeof(float));
	}
}

ITASoundSampleImpl::~ITASoundSampleImpl() {
	std::for_each(m_vpData.begin(), m_vpData.end(), arrayDeleteFunctor<float>);
}

bool ITASoundSampleImpl::OriginFile() const {
	return m_bOriginFile;
}

std::string ITASoundSampleImpl::GetName() const {
	return m_sName;
}

void ITASoundSampleImpl::SetName(const std::string& sName) {
	m_sName = sName;
}

std::string ITASoundSampleImpl::GetFilename() const {
	return m_sFilename;
}

int ITASoundSampleImpl::GetNumberOfChannels() const {
	return (int) m_vpData.size();
}

int ITASoundSampleImpl::GetLength() const {
	return m_iLength;
}

const float* ITASoundSampleImpl::GetChannelData(int iChannel) const {
	return m_vpData[iChannel];
}

bool ITASoundSampleImpl::HasPlaybackReferences() {
	m_csPlaybackRefCount.enter();
	bool bResult = (m_iPlaybackRefCount > 0);
	m_csPlaybackRefCount.leave();
	return bResult;
}

void ITASoundSampleImpl::AddPlaybackReference() {
	m_csPlaybackRefCount.enter();
	m_iPlaybackRefCount++;
	m_csPlaybackRefCount.leave();
}

void ITASoundSampleImpl::RemovePlaybackReference() {
	m_csPlaybackRefCount.enter();
	if (m_iPlaybackRefCount>0) m_iPlaybackRefCount--;
	m_csPlaybackRefCount.leave();
}