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312 lines
7.1 KiB
312 lines
7.1 KiB
/***************************************************************************
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copyright : (C) 2006 by Lukáš Lalinský
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email : lalinsky@gmail.com
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copyright : (C) 2004 by Allan Sandfeld Jensen
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email : kde@carewolf.org
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(original MPC implementation)
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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, *
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* MA 02110-1301 USA *
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***************************************************************************/
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#include <tbytevector.h>
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#include <tstring.h>
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#if 0
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#include <tdebug.h>
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#endif
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#include "wvfile.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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#include "combinedtag.h"
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using namespace TagLib;
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class WavPack::File::FilePrivate
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{
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public:
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FilePrivate() :
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APETag(0),
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APELocation(-1),
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APESize(0),
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ID3v1Tag(0),
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ID3v1Location(-1),
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tag(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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~FilePrivate()
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{
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if (tag != ID3v1Tag && tag != APETag) delete tag;
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delete ID3v1Tag;
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delete APETag;
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delete properties;
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}
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APE::Tag *APETag;
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long APELocation;
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uint APESize;
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ID3v1::Tag *ID3v1Tag;
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long ID3v1Location;
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Tag *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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};
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////////////////////////////////////////////////////////////////////////////////
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// public members
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////////////////////////////////////////////////////////////////////////////////
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WavPack::File::File(const char *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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read(readProperties, propertiesStyle);
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}
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WavPack::File::~File()
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{
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delete d;
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}
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TagLib::Tag *WavPack::File::tag() const
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{
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return d->tag;
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}
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WavPack::Properties *WavPack::File::audioProperties() const
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{
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return d->properties;
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}
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bool WavPack::File::save()
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{
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if(readOnly()) {
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#if 0
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debug("WavPack::File::save() -- File is read only.");
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#endif
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return false;
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}
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// Update ID3v1 tag
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if(d->ID3v1Tag) {
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if(d->hasID3v1) {
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seek(d->ID3v1Location);
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writeBlock(d->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(d->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(d->APETag) {
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if(d->hasAPE)
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insert(d->APETag->render(), d->APELocation, d->APESize);
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else {
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if(d->hasID3v1) {
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insert(d->APETag->render(), d->ID3v1Location, 0);
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d->APESize = d->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(d->APETag->render());
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d->APESize = d->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 *WavPack::File::ID3v1Tag(bool create)
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{
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if(!create || d->ID3v1Tag)
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return d->ID3v1Tag;
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// no ID3v1 tag exists and we've been asked to create one
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d->ID3v1Tag = new ID3v1::Tag;
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if(d->APETag)
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d->tag = new CombinedTag(d->APETag, d->ID3v1Tag);
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else
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d->tag = d->ID3v1Tag;
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return d->ID3v1Tag;
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}
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APE::Tag *WavPack::File::APETag(bool create)
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{
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if(!create || d->APETag)
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return d->APETag;
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// no APE tag exists and we've been asked to create one
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d->APETag = new APE::Tag;
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if(d->ID3v1Tag)
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d->tag = new CombinedTag(d->APETag, d->ID3v1Tag);
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else
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d->tag = d->APETag;
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return d->APETag;
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}
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void WavPack::File::remove(int tags)
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{
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if(tags & ID3v1) {
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delete d->ID3v1Tag;
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d->ID3v1Tag = 0;
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if(d->APETag)
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d->tag = d->APETag;
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else
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d->tag = d->APETag = new APE::Tag;
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}
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if(tags & APE) {
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delete d->APETag;
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d->APETag = 0;
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if(d->ID3v1Tag)
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d->tag = d->ID3v1Tag;
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else
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d->tag = d->APETag = new APE::Tag;
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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// private members
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////////////////////////////////////////////////////////////////////////////////
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void WavPack::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->ID3v1Tag = 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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d->APELocation = findAPE();
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if(d->APELocation >= 0) {
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d->APETag = new APE::Tag(this, d->APELocation);
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d->APESize = d->APETag->footer()->completeTagSize();
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d->APELocation = d->APELocation + d->APETag->footer()->size() - d->APESize;
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d->hasAPE = true;
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}
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if(d->hasID3v1 && d->hasAPE)
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d->tag = new CombinedTag(d->APETag, d->ID3v1Tag);
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else {
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if(d->hasID3v1)
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d->tag = d->ID3v1Tag;
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else {
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if(d->hasAPE)
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d->tag = d->APETag;
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else
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d->tag = d->APETag = new APE::Tag;
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}
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}
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// Look for WavPack audio properties
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if(readProperties) {
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seek(0);
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d->properties = new Properties(readBlock(WavPack::HeaderSize),
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length() - d->APESize);
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}
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}
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long WavPack::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 WavPack::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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