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/***************************************************************************
copyright : (C) 2008 by Scott Wheeler
email : wheeler@kde.org
***************************************************************************/
/***************************************************************************
* This library is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License version *
* 2.1 as published by the Free Software Foundation. *
* *
* This library is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this library; if not, write to the Free Software *
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA *
* 02110-1301 USA *
* *
* Alternatively, this file is available under the Mozilla Public *
* License Version 1.1. You may obtain a copy of the License at *
* http://www.mozilla.org/MPL/ *
***************************************************************************/
#include "wavproperties.h"
#include <tstring.h>
#include <tdebug.h>
#include <cmath>
#include <math.h>
using namespace TagLib;
class RIFF::WAV::Properties::PropertiesPrivate
{
public:
PropertiesPrivate(uint streamLength = 0) :
format(0),
length(0),
bitrate(0),
sampleRate(0),
channels(0),
sampleWidth(0),
sampleFrames(0),
streamLength(streamLength)
{
}
short format;
int length;
int bitrate;
int sampleRate;
int channels;
int sampleWidth;
uint sampleFrames;
uint streamLength;
};
////////////////////////////////////////////////////////////////////////////////
// public members
////////////////////////////////////////////////////////////////////////////////
RIFF::WAV::Properties::Properties(const ByteVector &data, ReadStyle style) : AudioProperties(style)
{
d = new PropertiesPrivate();
read(data);
}
RIFF::WAV::Properties::Properties(const ByteVector &data, uint streamLength, ReadStyle style) : AudioProperties(style)
{
d = new PropertiesPrivate(streamLength);
read(data);
}
RIFF::WAV::Properties::~Properties()
{
delete d;
}
int RIFF::WAV::Properties::length() const
{
return d->length;
}
int RIFF::WAV::Properties::bitrate() const
{
return d->bitrate;
}
int RIFF::WAV::Properties::sampleRate() const
{
return d->sampleRate;
}
int RIFF::WAV::Properties::channels() const
{
return d->channels;
}
int RIFF::WAV::Properties::sampleWidth() const
{
return d->sampleWidth;
}
uint RIFF::WAV::Properties::sampleFrames() const
{
return d->sampleFrames;
}
////////////////////////////////////////////////////////////////////////////////
// private members
////////////////////////////////////////////////////////////////////////////////
void RIFF::WAV::Properties::read(const ByteVector &data)
{
d->format = data.mid(0, 2).toShort(false);
d->channels = data.mid(2, 2).toShort(false);
d->sampleRate = data.mid(4, 4).toUInt(false);
d->sampleWidth = data.mid(14, 2).toShort(false);
uint byteRate = data.mid(8, 4).toUInt(false);
d->bitrate = byteRate * 8 / 1000;
d->length = byteRate > 0 ? d->streamLength / byteRate : 0;
d->sampleFrames = d->streamLength / (d->channels * (d->sampleWidth / 8));
}
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