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Clementine-audio-player-Mac.../3rdparty/taglib/ape/apefile.cpp

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/***************************************************************************
copyright : (C) 2010 by Alex Novichkov
email : novichko@atnet.ru
copyright : (C) 2006 by Lukáš Lalinský
email : lalinsky@gmail.com
(original WavPack implementation)
copyright : (C) 2004 by Allan Sandfeld Jensen
email : kde@carewolf.org
(original MPC implementation)
***************************************************************************/
/***************************************************************************
* This library is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License version *
* 2.1 as published by the Free Software Foundation. *
* *
* This library is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this library; if not, write to the Free Software *
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA *
* 02110-1301 USA *
* *
* Alternatively, this file is available under the Mozilla Public *
* License Version 1.1. You may obtain a copy of the License at *
* http://www.mozilla.org/MPL/ *
***************************************************************************/
#include <tbytevector.h>
#include <tstring.h>
#include <tdebug.h>
#include <tagunion.h>
#include <id3v1tag.h>
#include <id3v2header.h>
#include <tpropertymap.h>
#include "apefile.h"
#include "apetag.h"
#include "apefooter.h"
using namespace TagLib;
namespace
{
enum { ApeAPEIndex = 0, ApeID3v1Index = 1 };
}
class APE::File::FilePrivate
{
public:
FilePrivate() :
APELocation(-1),
APESize(0),
ID3v1Location(-1),
ID3v2Header(0),
ID3v2Location(-1),
ID3v2Size(0),
properties(0),
hasAPE(false),
hasID3v1(false),
hasID3v2(false) {}
~FilePrivate()
{
delete ID3v2Header;
delete properties;
}
long APELocation;
uint APESize;
long ID3v1Location;
ID3v2::Header *ID3v2Header;
long ID3v2Location;
uint ID3v2Size;
TagUnion tag;
Properties *properties;
// These indicate whether the file *on disk* has these tags, not if
// this data structure does. This is used in computing offsets.
bool hasAPE;
bool hasID3v1;
bool hasID3v2;
};
////////////////////////////////////////////////////////////////////////////////
// public members
////////////////////////////////////////////////////////////////////////////////
APE::File::File(FileName file, bool readProperties, Properties::ReadStyle) :
TagLib::File(file),
d(new FilePrivate())
{
if(isOpen())
read(readProperties);
}
APE::File::File(IOStream *stream, bool readProperties, Properties::ReadStyle) :
TagLib::File(stream),
d(new FilePrivate())
{
if(isOpen())
read(readProperties);
}
APE::File::~File()
{
delete d;
}
TagLib::Tag *APE::File::tag() const
{
return &d->tag;
}
PropertyMap APE::File::properties() const
{
if(d->hasAPE)
return d->tag.access<APE::Tag>(ApeAPEIndex, false)->properties();
if(d->hasID3v1)
return d->tag.access<ID3v1::Tag>(ApeID3v1Index, false)->properties();
return PropertyMap();
}
void APE::File::removeUnsupportedProperties(const StringList &properties)
{
if(d->hasAPE)
d->tag.access<APE::Tag>(ApeAPEIndex, false)->removeUnsupportedProperties(properties);
if(d->hasID3v1)
d->tag.access<ID3v1::Tag>(ApeID3v1Index, false)->removeUnsupportedProperties(properties);
}
PropertyMap APE::File::setProperties(const PropertyMap &properties)
{
if(d->hasID3v1)
d->tag.access<ID3v1::Tag>(ApeID3v1Index, false)->setProperties(properties);
return d->tag.access<APE::Tag>(ApeAPEIndex, true)->setProperties(properties);
}
APE::Properties *APE::File::audioProperties() const
{
return d->properties;
}
bool APE::File::save()
{
if(readOnly()) {
debug("APE::File::save() -- File is read only.");
return false;
}
// Update ID3v1 tag
if(ID3v1Tag()) {
if(d->hasID3v1) {
seek(d->ID3v1Location);
writeBlock(ID3v1Tag()->render());
}
else {
seek(0, End);
d->ID3v1Location = tell();
writeBlock(ID3v1Tag()->render());
d->hasID3v1 = true;
}
}
else {
if(d->hasID3v1) {
removeBlock(d->ID3v1Location, 128);
d->hasID3v1 = false;
if(d->hasAPE) {
if(d->APELocation > d->ID3v1Location)
d->APELocation -= 128;
}
}
}
// Update APE tag
if(APETag()) {
if(d->hasAPE)
insert(APETag()->render(), d->APELocation, d->APESize);
else {
if(d->hasID3v1) {
insert(APETag()->render(), d->ID3v1Location, 0);
d->APESize = APETag()->footer()->completeTagSize();
d->hasAPE = true;
d->APELocation = d->ID3v1Location;
d->ID3v1Location += d->APESize;
}
else {
seek(0, End);
d->APELocation = tell();
writeBlock(APETag()->render());
d->APESize = APETag()->footer()->completeTagSize();
d->hasAPE = true;
}
}
}
else {
if(d->hasAPE) {
removeBlock(d->APELocation, d->APESize);
d->hasAPE = false;
if(d->hasID3v1) {
if(d->ID3v1Location > d->APELocation) {
d->ID3v1Location -= d->APESize;
}
}
}
}
return true;
}
ID3v1::Tag *APE::File::ID3v1Tag(bool create)
{
return d->tag.access<ID3v1::Tag>(ApeID3v1Index, create);
}
APE::Tag *APE::File::APETag(bool create)
{
return d->tag.access<APE::Tag>(ApeAPEIndex, create);
}
void APE::File::strip(int tags)
{
if(tags & ID3v1) {
d->tag.set(ApeID3v1Index, 0);
APETag(true);
}
if(tags & APE) {
d->tag.set(ApeAPEIndex, 0);
if(!ID3v1Tag())
APETag(true);
}
}
bool APE::File::hasAPETag() const
{
return d->hasAPE;
}
bool APE::File::hasID3v1Tag() const
{
return d->hasID3v1;
}
////////////////////////////////////////////////////////////////////////////////
// private members
////////////////////////////////////////////////////////////////////////////////
void APE::File::read(bool readProperties)
{
// Look for an ID3v2 tag
d->ID3v2Location = findID3v2();
if(d->ID3v2Location >= 0) {
seek(d->ID3v2Location);
d->ID3v2Header = new ID3v2::Header(readBlock(ID3v2::Header::size()));
d->ID3v2Size = d->ID3v2Header->completeTagSize();
d->hasID3v2 = true;
}
// Look for an ID3v1 tag
d->ID3v1Location = findID3v1();
if(d->ID3v1Location >= 0) {
d->tag.set(ApeID3v1Index, new ID3v1::Tag(this, d->ID3v1Location));
d->hasID3v1 = true;
}
// Look for an APE tag
d->APELocation = findAPE();
if(d->APELocation >= 0) {
d->tag.set(ApeAPEIndex, new APE::Tag(this, d->APELocation));
d->APESize = APETag()->footer()->completeTagSize();
d->APELocation = d->APELocation + APETag()->footer()->size() - d->APESize;
d->hasAPE = true;
}
if(!d->hasID3v1)
APETag(true);
// Look for APE audio properties
if(readProperties) {
long streamLength;
if(d->hasAPE)
streamLength = d->APELocation;
else if(d->hasID3v1)
streamLength = d->ID3v1Location;
else
streamLength = length();
if(d->hasID3v2) {
seek(d->ID3v2Location + d->ID3v2Size);
streamLength -= (d->ID3v2Location + d->ID3v2Size);
}
else {
seek(0);
}
d->properties = new Properties(this, streamLength);
}
}
long APE::File::findAPE()
{
if(!isValid())
return -1;
if(d->hasID3v1)
seek(-160, End);
else
seek(-32, End);
long p = tell();
if(readBlock(8) == APE::Tag::fileIdentifier())
return p;
return -1;
}
long APE::File::findID3v1()
{
if(!isValid())
return -1;
seek(-128, End);
long p = tell();
if(readBlock(3) == ID3v1::Tag::fileIdentifier())
return p;
return -1;
}
long APE::File::findID3v2()
{
if(!isValid())
return -1;
seek(0);
if(readBlock(3) == ID3v2::Header::fileIdentifier())
return 0;
return -1;
}
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