234 lines
6.6 KiB
C++
234 lines
6.6 KiB
C++
/***************************************************************************
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copyright : (C) 2002 - 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 <tdebug.h>
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#include <tmap.h>
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#include "relativevolumeframe.h"
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using namespace TagLib;
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using namespace ID3v2;
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struct ChannelData
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{
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ChannelData() : channelType(RelativeVolumeFrame::Other), volumeAdjustment(0) {}
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RelativeVolumeFrame::ChannelType channelType;
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short volumeAdjustment;
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RelativeVolumeFrame::PeakVolume peakVolume;
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};
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class RelativeVolumeFrame::RelativeVolumeFramePrivate
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{
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public:
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String identification;
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Map<ChannelType, ChannelData> channels;
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};
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////////////////////////////////////////////////////////////////////////////////
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// public members
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////////////////////////////////////////////////////////////////////////////////
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RelativeVolumeFrame::RelativeVolumeFrame() :
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Frame("RVA2"),
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d(new RelativeVolumeFramePrivate())
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{
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}
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RelativeVolumeFrame::RelativeVolumeFrame(const ByteVector &data) :
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Frame(data),
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d(new RelativeVolumeFramePrivate())
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{
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setData(data);
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}
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RelativeVolumeFrame::~RelativeVolumeFrame()
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{
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delete d;
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}
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String RelativeVolumeFrame::toString() const
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{
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return d->identification;
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}
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List<RelativeVolumeFrame::ChannelType> RelativeVolumeFrame::channels() const
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{
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List<ChannelType> l;
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Map<ChannelType, ChannelData>::ConstIterator it = d->channels.begin();
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for(; it != d->channels.end(); ++it)
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l.append((*it).first);
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return l;
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}
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// deprecated
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RelativeVolumeFrame::ChannelType RelativeVolumeFrame::channelType() const
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{
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return MasterVolume;
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}
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// deprecated
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void RelativeVolumeFrame::setChannelType(ChannelType)
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{
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}
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short RelativeVolumeFrame::volumeAdjustmentIndex(ChannelType type) const
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{
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return d->channels.contains(type) ? d->channels[type].volumeAdjustment : 0;
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}
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short RelativeVolumeFrame::volumeAdjustmentIndex() const
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{
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return volumeAdjustmentIndex(MasterVolume);
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}
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void RelativeVolumeFrame::setVolumeAdjustmentIndex(short index, ChannelType type)
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{
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d->channels[type].volumeAdjustment = index;
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}
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void RelativeVolumeFrame::setVolumeAdjustmentIndex(short index)
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{
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setVolumeAdjustmentIndex(index, MasterVolume);
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}
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float RelativeVolumeFrame::volumeAdjustment(ChannelType type) const
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{
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return d->channels.contains(type) ? float(d->channels[type].volumeAdjustment) / float(512) : 0;
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}
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float RelativeVolumeFrame::volumeAdjustment() const
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{
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return volumeAdjustment(MasterVolume);
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}
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void RelativeVolumeFrame::setVolumeAdjustment(float adjustment, ChannelType type)
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{
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d->channels[type].volumeAdjustment = short(adjustment * float(512));
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}
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void RelativeVolumeFrame::setVolumeAdjustment(float adjustment)
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{
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setVolumeAdjustment(adjustment, MasterVolume);
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}
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RelativeVolumeFrame::PeakVolume RelativeVolumeFrame::peakVolume(ChannelType type) const
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{
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return d->channels.contains(type) ? d->channels[type].peakVolume : PeakVolume();
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}
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RelativeVolumeFrame::PeakVolume RelativeVolumeFrame::peakVolume() const
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{
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return peakVolume(MasterVolume);
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}
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void RelativeVolumeFrame::setPeakVolume(const PeakVolume &peak, ChannelType type)
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{
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d->channels[type].peakVolume = peak;
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}
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void RelativeVolumeFrame::setPeakVolume(const PeakVolume &peak)
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{
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setPeakVolume(peak, MasterVolume);
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}
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String RelativeVolumeFrame::identification() const
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{
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return d->identification;
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}
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void RelativeVolumeFrame::setIdentification(const String &s)
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{
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d->identification = s;
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}
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////////////////////////////////////////////////////////////////////////////////
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// protected members
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////////////////////////////////////////////////////////////////////////////////
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void RelativeVolumeFrame::parseFields(const ByteVector &data)
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{
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int pos = 0;
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d->identification = readStringField(data, String::Latin1, &pos);
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// Each channel is at least 4 bytes.
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while(pos <= (int)data.size() - 4) {
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ChannelType type = ChannelType(data[pos]);
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pos += 1;
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ChannelData &channel = d->channels[type];
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channel.volumeAdjustment = data.toShort(static_cast<unsigned int>(pos));
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pos += 2;
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channel.peakVolume.bitsRepresentingPeak = data[pos];
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pos += 1;
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const int bytes = (channel.peakVolume.bitsRepresentingPeak + 7) / 8;
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channel.peakVolume.peakVolume = data.mid(pos, bytes);
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pos += bytes;
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}
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}
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ByteVector RelativeVolumeFrame::renderFields() const
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{
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ByteVector data;
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data.append(d->identification.data(String::Latin1));
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data.append(textDelimiter(String::Latin1));
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Map<ChannelType, ChannelData>::ConstIterator it = d->channels.begin();
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for(; it != d->channels.end(); ++it) {
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ChannelType type = (*it).first;
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const ChannelData &channel = (*it).second;
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data.append(char(type));
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data.append(ByteVector::fromShort(channel.volumeAdjustment));
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data.append(char(channel.peakVolume.bitsRepresentingPeak));
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data.append(channel.peakVolume.peakVolume);
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}
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return data;
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}
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////////////////////////////////////////////////////////////////////////////////
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// private members
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////////////////////////////////////////////////////////////////////////////////
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RelativeVolumeFrame::RelativeVolumeFrame(const ByteVector &data, Header *h) :
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Frame(h),
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d(new RelativeVolumeFramePrivate())
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{
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parseFields(fieldData(data));
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}
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