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135 lines
3.6 KiB
135 lines
3.6 KiB
/***************************************************************************
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copyright : (C) 2006 by Lukáš Lalinský
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email : lalinsky@gmail.com
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copyright : (C) 2004 by Allan Sandfeld Jensen
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email : kde@carewolf.org
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(original MPC implementation)
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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, *
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* MA 02110-1301 USA *
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***************************************************************************/
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#include <tstring.h>
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#if 0
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#include <tdebug.h>
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#endif
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#include <bitset>
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#include "ttaproperties.h"
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#include "ttafile.h"
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using namespace TagLib;
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class TTA::Properties::PropertiesPrivate
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{
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public:
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PropertiesPrivate(const ByteVector &d, long length, ReadStyle s) :
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data(d),
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streamLength(length),
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style(s),
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version(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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bitsPerSample(0) {}
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ByteVector data;
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long streamLength;
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ReadStyle style;
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int version;
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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 bitsPerSample;
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};
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////////////////////////////////////////////////////////////////////////////////
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// public members
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////////////////////////////////////////////////////////////////////////////////
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TTA::Properties::Properties(const ByteVector &data, long streamLength, ReadStyle style) : AudioProperties(style)
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{
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d = new PropertiesPrivate(data, streamLength, style);
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read();
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}
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TTA::Properties::~Properties()
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{
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delete d;
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}
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int TTA::Properties::length() const
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{
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return d->length;
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}
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int TTA::Properties::bitrate() const
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{
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return d->bitrate;
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}
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int TTA::Properties::sampleRate() const
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{
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return d->sampleRate;
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}
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int TTA::Properties::bitsPerSample() const
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{
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return d->bitsPerSample;
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}
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int TTA::Properties::channels() const
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{
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return d->channels;
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}
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int TTA::Properties::ttaVersion() const
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{
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return d->version;
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}
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////////////////////////////////////////////////////////////////////////////////
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// private members
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////////////////////////////////////////////////////////////////////////////////
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void TTA::Properties::read()
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{
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if(!d->data.startsWith("TTA"))
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return;
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int pos = 3;
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d->version = d->data[pos] - '0';
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pos += 1 + 2;
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d->channels = d->data.mid(pos, 2).toShort(false);
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pos += 2;
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d->bitsPerSample = d->data.mid(pos, 2).toShort(false);
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pos += 2;
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d->sampleRate = d->data.mid(pos, 4).toUInt(false);
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pos += 4;
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unsigned long samples = d->data.mid(pos, 4).toUInt(false);
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d->length = samples / d->sampleRate;
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d->bitrate = d->length > 0 ? ((d->streamLength * 8L) / d->length) / 1000 : 0;
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}
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