136 lines
4.8 KiB
C++
136 lines
4.8 KiB
C++
/***************************************************************************
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copyright : (C) 2013 by Stephen F. Booth
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email : me@sbooth.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 "dsfproperties.h"
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using namespace Strawberry_TagLib::TagLib;
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class DSF::AudioProperties::AudioPropertiesPrivate {
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public:
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explicit AudioPropertiesPrivate() : formatVersion(0),
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formatID(0),
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channelType(0),
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channelNum(0),
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samplingFrequency(0),
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bitsPerSample(0),
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sampleCount(0),
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blockSizePerChannel(0),
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bitrate(0),
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length(0) {
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}
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// Nomenclature is from DSF file format specification
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unsigned int formatVersion;
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unsigned int formatID;
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unsigned int channelType;
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unsigned int channelNum;
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unsigned int samplingFrequency;
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unsigned int bitsPerSample;
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long long sampleCount;
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unsigned int blockSizePerChannel;
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// Computed
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int bitrate;
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int length;
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};
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////////////////////////////////////////////////////////////////////////////////
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// public members
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////////////////////////////////////////////////////////////////////////////////
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DSF::AudioProperties::AudioProperties(const ByteVector &data, ReadStyle) : Strawberry_TagLib::TagLib::AudioProperties(), d(new AudioPropertiesPrivate()) {
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read(data);
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}
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DSF::AudioProperties::~AudioProperties() {
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delete d;
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}
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int DSF::AudioProperties::lengthInSeconds() const {
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return d->length / 1000;
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}
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int DSF::AudioProperties::lengthInMilliseconds() const {
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return d->length;
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}
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int DSF::AudioProperties::bitrate() const {
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return d->bitrate;
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}
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int DSF::AudioProperties::sampleRate() const {
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return d->samplingFrequency;
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}
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int DSF::AudioProperties::channels() const {
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return d->channelNum;
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}
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// DSF specific
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int DSF::AudioProperties::formatVersion() const {
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return d->formatVersion;
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}
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int DSF::AudioProperties::formatID() const {
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return d->formatID;
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}
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int DSF::AudioProperties::channelType() const {
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return d->channelType;
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}
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int DSF::AudioProperties::bitsPerSample() const {
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return d->bitsPerSample;
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}
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long long DSF::AudioProperties::sampleCount() const {
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return d->sampleCount;
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}
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int DSF::AudioProperties::blockSizePerChannel() const {
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return d->blockSizePerChannel;
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}
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////////////////////////////////////////////////////////////////////////////////
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// private members
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////////////////////////////////////////////////////////////////////////////////
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void DSF::AudioProperties::read(const ByteVector &data) {
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d->formatVersion = data.toUInt32LE(0);
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d->formatID = data.toUInt32LE(4);
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d->channelType = data.toUInt32LE(8);
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d->channelNum = data.toUInt32LE(12);
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d->samplingFrequency = data.toUInt32LE(16);
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d->bitsPerSample = data.toUInt32LE(20);
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d->sampleCount = data.toInt64LE(24);
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d->blockSizePerChannel = data.toUInt32LE(32);
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d->bitrate = static_cast<int>((d->samplingFrequency * d->bitsPerSample * d->channelNum) / 1000.0 + 0.5);
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d->length = d->samplingFrequency > 0 ? static_cast<int>(d->sampleCount * 1000.0 / d->samplingFrequency + 0.5) : 0;
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}
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