333 lines
7.8 KiB
C++
333 lines
7.8 KiB
C++
/***************************************************************************
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copyright : (C) 2004 by Allan Sandfeld Jensen
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email : kde@carewolf.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 <tbytevector.h>
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#include <tstring.h>
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#include <tagunion.h>
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#include <tdebug.h>
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#include <tpropertymap.h>
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#include <tagutils.h>
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#include "mpcfile.h"
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#include "id3v1tag.h"
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#include "id3v2header.h"
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#include "apetag.h"
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#include "apefooter.h"
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using namespace TagLib;
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namespace
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{
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enum { MPCAPEIndex = 0, MPCID3v1Index = 1 };
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}
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class MPC::File::FilePrivate
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{
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public:
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FilePrivate() :
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APELocation(-1),
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APESize(0),
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ID3v1Location(-1),
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ID3v2Header(0),
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ID3v2Location(-1),
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ID3v2Size(0),
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properties(0) {}
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~FilePrivate()
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{
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delete ID3v2Header;
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delete properties;
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}
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long APELocation;
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long APESize;
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long ID3v1Location;
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ID3v2::Header *ID3v2Header;
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long ID3v2Location;
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long ID3v2Size;
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TagUnion tag;
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Properties *properties;
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};
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////////////////////////////////////////////////////////////////////////////////
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// static members
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////////////////////////////////////////////////////////////////////////////////
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bool MPC::File::isSupported(IOStream *stream)
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{
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// A newer MPC file has to start with "MPCK" or "MP+", but older files don't
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// have keys to do a quick check.
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const ByteVector id = Utils::readHeader(stream, 4, false);
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return (id == "MPCK" || id.startsWith("MP+"));
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}
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////////////////////////////////////////////////////////////////////////////////
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// public members
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////////////////////////////////////////////////////////////////////////////////
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MPC::File::File(FileName file, bool readProperties, Properties::ReadStyle) :
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TagLib::File(file),
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d(new FilePrivate())
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{
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if(isOpen())
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read(readProperties);
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}
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MPC::File::File(IOStream *stream, bool readProperties, Properties::ReadStyle) :
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TagLib::File(stream),
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d(new FilePrivate())
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{
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if(isOpen())
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read(readProperties);
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}
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MPC::File::~File()
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{
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delete d;
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}
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TagLib::Tag *MPC::File::tag() const
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{
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return &d->tag;
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}
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PropertyMap MPC::File::properties() const
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{
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return d->tag.properties();
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}
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void MPC::File::removeUnsupportedProperties(const StringList &properties)
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{
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d->tag.removeUnsupportedProperties(properties);
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}
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PropertyMap MPC::File::setProperties(const PropertyMap &properties)
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{
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if(ID3v1Tag())
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ID3v1Tag()->setProperties(properties);
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return APETag(true)->setProperties(properties);
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}
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MPC::Properties *MPC::File::audioProperties() const
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{
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return d->properties;
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}
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bool MPC::File::save()
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{
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if(readOnly()) {
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debug("MPC::File::save() -- File is read only.");
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return false;
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}
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// Possibly strip ID3v2 tag
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if(!d->ID3v2Header && d->ID3v2Location >= 0) {
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removeBlock(d->ID3v2Location, d->ID3v2Size);
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if(d->APELocation >= 0)
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d->APELocation -= d->ID3v2Size;
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if(d->ID3v1Location >= 0)
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d->ID3v1Location -= d->ID3v2Size;
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d->ID3v2Location = -1;
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d->ID3v2Size = 0;
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}
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// Update ID3v1 tag
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if(ID3v1Tag() && !ID3v1Tag()->isEmpty()) {
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// ID3v1 tag is not empty. Update the old one or create a new one.
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if(d->ID3v1Location >= 0) {
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seek(d->ID3v1Location);
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}
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else {
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seek(0, End);
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d->ID3v1Location = tell();
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}
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writeBlock(ID3v1Tag()->render());
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}
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else {
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// ID3v1 tag is empty. Remove the old one.
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if(d->ID3v1Location >= 0) {
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truncate(d->ID3v1Location);
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d->ID3v1Location = -1;
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}
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}
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// Update APE tag
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if(APETag() && !APETag()->isEmpty()) {
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// APE tag is not empty. Update the old one or create a new one.
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if(d->APELocation < 0) {
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if(d->ID3v1Location >= 0)
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d->APELocation = d->ID3v1Location;
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else
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d->APELocation = length();
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}
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const ByteVector data = APETag()->render();
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insert(data, d->APELocation, d->APESize);
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if(d->ID3v1Location >= 0)
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d->ID3v1Location += (static_cast<long>(data.size()) - d->APESize);
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d->APESize = data.size();
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}
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else {
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// APE tag is empty. Remove the old one.
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if(d->APELocation >= 0) {
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removeBlock(d->APELocation, d->APESize);
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if(d->ID3v1Location >= 0)
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d->ID3v1Location -= d->APESize;
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d->APELocation = -1;
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d->APESize = 0;
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}
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}
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return true;
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}
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ID3v1::Tag *MPC::File::ID3v1Tag(bool create)
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{
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return d->tag.access<ID3v1::Tag>(MPCID3v1Index, create);
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}
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APE::Tag *MPC::File::APETag(bool create)
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{
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return d->tag.access<APE::Tag>(MPCAPEIndex, create);
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}
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void MPC::File::strip(int tags)
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{
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if(tags & ID3v1)
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d->tag.set(MPCID3v1Index, 0);
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if(tags & APE)
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d->tag.set(MPCAPEIndex, 0);
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if(!ID3v1Tag())
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APETag(true);
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if(tags & ID3v2) {
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delete d->ID3v2Header;
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d->ID3v2Header = 0;
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}
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}
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void MPC::File::remove(int tags)
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{
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strip(tags);
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}
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bool MPC::File::hasID3v1Tag() const
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{
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return (d->ID3v1Location >= 0);
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}
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bool MPC::File::hasAPETag() const
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{
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return (d->APELocation >= 0);
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}
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////////////////////////////////////////////////////////////////////////////////
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// private members
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////////////////////////////////////////////////////////////////////////////////
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void MPC::File::read(bool readProperties)
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{
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// Look for an ID3v2 tag
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d->ID3v2Location = Utils::findID3v2(this);
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if(d->ID3v2Location >= 0) {
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seek(d->ID3v2Location);
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d->ID3v2Header = new ID3v2::Header(readBlock(ID3v2::Header::size()));
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d->ID3v2Size = d->ID3v2Header->completeTagSize();
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}
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// Look for an ID3v1 tag
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d->ID3v1Location = Utils::findID3v1(this);
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if(d->ID3v1Location >= 0)
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d->tag.set(MPCID3v1Index, new ID3v1::Tag(this, d->ID3v1Location));
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// Look for an APE tag
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d->APELocation = Utils::findAPE(this, d->ID3v1Location);
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if(d->APELocation >= 0) {
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d->tag.set(MPCAPEIndex, new APE::Tag(this, d->APELocation));
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d->APESize = APETag()->footer()->completeTagSize();
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d->APELocation = d->APELocation + APE::Footer::size() - d->APESize;
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}
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if(d->ID3v1Location < 0)
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APETag(true);
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// Look for MPC metadata
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if(readProperties) {
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long streamLength;
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if(d->APELocation >= 0)
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streamLength = d->APELocation;
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else if(d->ID3v1Location >= 0)
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streamLength = d->ID3v1Location;
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else
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streamLength = length();
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if(d->ID3v2Location >= 0) {
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seek(d->ID3v2Location + d->ID3v2Size);
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streamLength -= (d->ID3v2Location + d->ID3v2Size);
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}
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else {
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seek(0);
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}
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d->properties = new Properties(this, streamLength);
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}
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}
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