2012-10-28 02:12:18 +02:00
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/***************************************************************************
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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 "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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2013-08-18 04:39:33 +02:00
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enum { MPCAPEIndex = 0, MPCID3v1Index = 1 };
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2012-10-28 02:12:18 +02:00
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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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scanned(false),
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hasAPE(false),
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hasID3v1(false),
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hasID3v2(false) {}
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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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uint APESize;
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long ID3v1Location;
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ID3v2::Header *ID3v2Header;
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long ID3v2Location;
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uint ID3v2Size;
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TagUnion tag;
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Properties *properties;
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bool scanned;
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// These indicate whether the file *on disk* has these tags, not if
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// this data structure does. This is used in computing offsets.
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bool hasAPE;
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bool hasID3v1;
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bool hasID3v2;
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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,
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Properties::ReadStyle propertiesStyle) : TagLib::File(file)
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{
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d = new FilePrivate;
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2013-08-18 04:39:33 +02:00
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if(isOpen())
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read(readProperties, propertiesStyle);
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2012-10-28 02:12:18 +02:00
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}
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MPC::File::File(IOStream *stream, bool readProperties,
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Properties::ReadStyle propertiesStyle) : TagLib::File(stream)
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{
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d = new FilePrivate;
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2013-08-18 04:39:33 +02:00
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if(isOpen())
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read(readProperties, propertiesStyle);
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2012-10-28 02:12:18 +02:00
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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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if(d->hasAPE)
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return d->tag.access<APE::Tag>(MPCAPEIndex, false)->properties();
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if(d->hasID3v1)
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return d->tag.access<ID3v1::Tag>(MPCID3v1Index, false)->properties();
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return PropertyMap();
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}
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void MPC::File::removeUnsupportedProperties(const StringList &properties)
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{
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if(d->hasAPE)
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d->tag.access<APE::Tag>(MPCAPEIndex, false)->removeUnsupportedProperties(properties);
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if(d->hasID3v1)
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d->tag.access<ID3v1::Tag>(MPCID3v1Index, false)->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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2013-08-18 04:39:33 +02:00
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if(d->hasID3v1)
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d->tag.access<APE::Tag>(MPCID3v1Index, false)->setProperties(properties);
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return d->tag.access<APE::Tag>(MPCAPEIndex, true)->setProperties(properties);
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2012-10-28 02:12:18 +02:00
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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->hasID3v2 && !d->ID3v2Header) {
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removeBlock(d->ID3v2Location, d->ID3v2Size);
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d->hasID3v2 = false;
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if(d->hasID3v1)
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d->ID3v1Location -= d->ID3v2Size;
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if(d->hasAPE)
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d->APELocation -= d->ID3v2Size;
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}
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// Update ID3v1 tag
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if(ID3v1Tag()) {
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if(d->hasID3v1) {
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seek(d->ID3v1Location);
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writeBlock(ID3v1Tag()->render());
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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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writeBlock(ID3v1Tag()->render());
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d->hasID3v1 = true;
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}
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} else
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if(d->hasID3v1) {
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removeBlock(d->ID3v1Location, 128);
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d->hasID3v1 = false;
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if(d->hasAPE) {
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if(d->APELocation > d->ID3v1Location)
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d->APELocation -= 128;
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}
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}
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// Update APE tag
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if(APETag()) {
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if(d->hasAPE)
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insert(APETag()->render(), d->APELocation, d->APESize);
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else {
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if(d->hasID3v1) {
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insert(APETag()->render(), d->ID3v1Location, 0);
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d->APESize = APETag()->footer()->completeTagSize();
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d->hasAPE = true;
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d->APELocation = d->ID3v1Location;
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d->ID3v1Location += d->APESize;
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}
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else {
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seek(0, End);
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d->APELocation = tell();
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writeBlock(APETag()->render());
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d->APESize = APETag()->footer()->completeTagSize();
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d->hasAPE = true;
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}
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}
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}
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else
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if(d->hasAPE) {
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removeBlock(d->APELocation, d->APESize);
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d->hasAPE = false;
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if(d->hasID3v1) {
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if(d->ID3v1Location > d->APELocation)
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d->ID3v1Location -= d->APESize;
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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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APETag(true);
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}
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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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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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}
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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->hasID3v1;
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}
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bool MPC::File::hasAPETag() const
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{
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return d->hasAPE;
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}
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2012-10-28 02:12:18 +02:00
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////////////////////////////////////////////////////////////////////////////////
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// private members
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////////////////////////////////////////////////////////////////////////////////
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void MPC::File::read(bool readProperties, Properties::ReadStyle /* propertiesStyle */)
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{
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// Look for an ID3v1 tag
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d->ID3v1Location = findID3v1();
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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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d->hasID3v1 = true;
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}
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// Look for an APE tag
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findAPE();
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d->APELocation = findAPE();
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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 + APETag()->footer()->size() - d->APESize;
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d->hasAPE = true;
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}
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if(!d->hasID3v1)
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APETag(true);
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// Look for and skip an ID3v2 tag
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d->ID3v2Location = findID3v2();
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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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d->hasID3v2 = true;
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}
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if(d->hasID3v2)
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seek(d->ID3v2Location + d->ID3v2Size);
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else
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seek(0);
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// Look for MPC metadata
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if(readProperties) {
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d->properties = new Properties(this, length() - d->ID3v2Size - d->APESize);
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}
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}
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long MPC::File::findAPE()
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{
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if(!isValid())
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return -1;
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if(d->hasID3v1)
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seek(-160, End);
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else
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seek(-32, End);
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long p = tell();
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if(readBlock(8) == APE::Tag::fileIdentifier())
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return p;
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return -1;
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}
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long MPC::File::findID3v1()
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{
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if(!isValid())
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return -1;
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seek(-128, End);
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long p = tell();
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if(readBlock(3) == ID3v1::Tag::fileIdentifier())
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return p;
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return -1;
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}
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long MPC::File::findID3v2()
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{
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if(!isValid())
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return -1;
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seek(0);
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if(readBlock(3) == ID3v2::Header::fileIdentifier())
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return 0;
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return -1;
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}
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