130 lines
3.9 KiB
C++
130 lines
3.9 KiB
C++
/***************************************************************************
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copyright : (C) 2008 by Scott Wheeler
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email : wheeler@kde.org
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***************************************************************************/
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/***************************************************************************
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* This library is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU Lesser General Public License version *
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* 2.1 as published by the Free Software Foundation. *
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* *
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* This library is distributed in the hope that it will be useful, but *
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* WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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* Lesser General Public License for more details. *
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* *
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* You should have received a copy of the GNU Lesser General Public *
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* License along with this library; if not, write to the Free Software *
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA *
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* 02110-1301 USA *
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* *
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* Alternatively, this file is available under the Mozilla Public *
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* License Version 1.1. You may obtain a copy of the License at *
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* http://www.mozilla.org/MPL/ *
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***************************************************************************/
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#include "wavproperties.h"
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#include <tstring.h>
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#include <tdebug.h>
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#include <cmath>
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#include <math.h>
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using namespace TagLib;
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class RIFF::WAV::Properties::PropertiesPrivate
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{
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public:
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PropertiesPrivate(uint streamLength = 0) :
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format(0),
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length(0),
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bitrate(0),
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sampleRate(0),
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channels(0),
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sampleWidth(0),
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sampleFrames(0),
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streamLength(streamLength)
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{
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}
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short format;
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int length;
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int bitrate;
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int sampleRate;
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int channels;
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int sampleWidth;
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uint sampleFrames;
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uint streamLength;
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};
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////////////////////////////////////////////////////////////////////////////////
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// public members
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////////////////////////////////////////////////////////////////////////////////
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RIFF::WAV::Properties::Properties(const ByteVector &data, ReadStyle style) : AudioProperties(style)
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{
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d = new PropertiesPrivate();
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read(data);
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}
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RIFF::WAV::Properties::Properties(const ByteVector &data, uint streamLength, ReadStyle style) : AudioProperties(style)
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{
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d = new PropertiesPrivate(streamLength);
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read(data);
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}
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RIFF::WAV::Properties::~Properties()
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{
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delete d;
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}
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int RIFF::WAV::Properties::length() const
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{
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return d->length;
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}
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int RIFF::WAV::Properties::bitrate() const
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{
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return d->bitrate;
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}
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int RIFF::WAV::Properties::sampleRate() const
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{
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return d->sampleRate;
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}
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int RIFF::WAV::Properties::channels() const
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{
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return d->channels;
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}
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int RIFF::WAV::Properties::sampleWidth() const
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{
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return d->sampleWidth;
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}
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TagLib::uint RIFF::WAV::Properties::sampleFrames() const
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{
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return d->sampleFrames;
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}
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////////////////////////////////////////////////////////////////////////////////
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// private members
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////////////////////////////////////////////////////////////////////////////////
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void RIFF::WAV::Properties::read(const ByteVector &data)
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{
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d->format = data.toShort(0, false);
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d->channels = data.toShort(2, false);
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d->sampleRate = data.toUInt(4, false);
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d->sampleWidth = data.toShort(14, false);
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const uint byteRate = data.toUInt(8, false);
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d->bitrate = byteRate * 8 / 1000;
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d->length = byteRate > 0 ? d->streamLength / byteRate : 0;
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if(d->channels > 0 && d->sampleWidth > 0)
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d->sampleFrames = d->streamLength / (d->channels * ((d->sampleWidth + 7) / 8));
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}
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