193 lines
5.4 KiB
C++
193 lines
5.4 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 <tstring.h>
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#include <tdebug.h>
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#include "aifffile.h"
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#include "aiffproperties.h"
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using namespace TagLib;
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class RIFF::AIFF::Properties::PropertiesPrivate
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{
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public:
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PropertiesPrivate() :
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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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sampleFrames(0) {}
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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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ByteVector compressionType;
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String compressionName;
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unsigned int sampleFrames;
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};
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////////////////////////////////////////////////////////////////////////////////
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// public members
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////////////////////////////////////////////////////////////////////////////////
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RIFF::AIFF::Properties::Properties(const ByteVector &, ReadStyle style) :
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AudioProperties(style),
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d(new PropertiesPrivate())
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{
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debug("RIFF::AIFF::Properties::Properties() - This constructor is no longer used.");
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}
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RIFF::AIFF::Properties::Properties(File *file, ReadStyle style) :
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AudioProperties(style),
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d(new PropertiesPrivate())
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{
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read(file);
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}
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RIFF::AIFF::Properties::~Properties()
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{
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delete d;
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}
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int RIFF::AIFF::Properties::length() const
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{
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return lengthInSeconds();
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}
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int RIFF::AIFF::Properties::lengthInSeconds() const
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{
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return d->length / 1000;
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}
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int RIFF::AIFF::Properties::lengthInMilliseconds() const
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{
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return d->length;
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}
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int RIFF::AIFF::Properties::bitrate() const
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{
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return d->bitrate;
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}
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int RIFF::AIFF::Properties::sampleRate() const
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{
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return d->sampleRate;
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}
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int RIFF::AIFF::Properties::channels() const
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{
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return d->channels;
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}
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int RIFF::AIFF::Properties::bitsPerSample() const
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{
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return d->bitsPerSample;
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}
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int RIFF::AIFF::Properties::sampleWidth() const
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{
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return bitsPerSample();
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}
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unsigned int RIFF::AIFF::Properties::sampleFrames() const
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{
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return d->sampleFrames;
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}
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bool RIFF::AIFF::Properties::isAiffC() const
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{
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return (!d->compressionType.isEmpty());
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}
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ByteVector RIFF::AIFF::Properties::compressionType() const
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{
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return d->compressionType;
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}
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String RIFF::AIFF::Properties::compressionName() const
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{
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return d->compressionName;
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}
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////////////////////////////////////////////////////////////////////////////////
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// private members
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////////////////////////////////////////////////////////////////////////////////
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void RIFF::AIFF::Properties::read(File *file)
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{
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ByteVector data;
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unsigned int streamLength = 0;
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for(unsigned int i = 0; i < file->chunkCount(); i++) {
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const ByteVector name = file->chunkName(i);
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if(name == "COMM") {
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if(data.isEmpty())
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data = file->chunkData(i);
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else
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debug("RIFF::AIFF::Properties::read() - Duplicate 'COMM' chunk found.");
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}
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else if(name == "SSND") {
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if(streamLength == 0)
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streamLength = file->chunkDataSize(i) + file->chunkPadding(i);
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else
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debug("RIFF::AIFF::Properties::read() - Duplicate 'SSND' chunk found.");
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}
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}
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if(data.size() < 18) {
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debug("RIFF::AIFF::Properties::read() - 'COMM' chunk not found or too short.");
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return;
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}
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if(streamLength == 0) {
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debug("RIFF::AIFF::Properties::read() - 'SSND' chunk not found.");
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return;
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}
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d->channels = data.toShort(0U);
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d->sampleFrames = data.toUInt(2U);
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d->bitsPerSample = data.toShort(6U);
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const long double sampleRate = data.toFloat80BE(8);
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if(sampleRate >= 1.0)
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d->sampleRate = static_cast<int>(sampleRate + 0.5);
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if(d->sampleFrames > 0 && d->sampleRate > 0) {
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const double length = d->sampleFrames * 1000.0 / sampleRate;
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d->length = static_cast<int>(length + 0.5);
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d->bitrate = static_cast<int>(streamLength * 8.0 / length + 0.5);
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}
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if(data.size() >= 23) {
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d->compressionType = data.mid(18, 4);
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d->compressionName
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= String(data.mid(23, static_cast<unsigned char>(data[22])), String::Latin1);
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}
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}
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