292 lines
7.6 KiB
C++
292 lines
7.6 KiB
C++
/***************************************************************************
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copyright : (C) 2010 by Alex Novichkov
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email : novichko@atnet.ru
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copyright : (C) 2006 by Lukáš Lalinský
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email : lalinsky@gmail.com
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(original WavPack implementation)
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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, 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 <memory>
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#include "tbytevector.h"
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#include "tstring.h"
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#include "tdebug.h"
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#include "tagunion.h"
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#include "id3v1tag.h"
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#include "id3v2header.h"
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#include "tpropertymap.h"
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#include "tagutils.h"
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#include "apefile.h"
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#include "apetag.h"
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#include "apefooter.h"
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using namespace Strawberry_TagLib::TagLib;
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namespace {
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enum { ApeAPEIndex = 0,
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ApeID3v1Index = 1 };
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}
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class APE::File::FilePrivate {
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public:
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FilePrivate() : APELocation(-1),
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APESize(0),
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ID3v1Location(-1),
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ID3v2Location(-1),
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ID3v2Size(0) {}
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long long APELocation;
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long long APESize;
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long long ID3v1Location;
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std::unique_ptr<ID3v2::Header> ID3v2Header;
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long long ID3v2Location;
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long long ID3v2Size;
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DoubleTagUnion tag;
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std::unique_ptr<AudioProperties> properties;
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};
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////////////////////////////////////////////////////////////////////////////////
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// static members
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////////////////////////////////////////////////////////////////////////////////
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bool APE::File::isSupported(IOStream *stream) {
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// An APE file has an ID "MAC " somewhere. An ID3v2 tag may precede.
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const ByteVector buffer = Utils::readHeader(stream, bufferSize(), true);
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return (buffer.find("MAC ") == 0);
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}
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////////////////////////////////////////////////////////////////////////////////
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// public members
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////////////////////////////////////////////////////////////////////////////////
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APE::File::File(FileName file, bool readProperties, AudioProperties::ReadStyle) : Strawberry_TagLib::TagLib::File(file), d(new FilePrivate()) {
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if (isOpen())
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read(readProperties);
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}
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APE::File::File(IOStream *stream, bool readProperties, AudioProperties::ReadStyle) : Strawberry_TagLib::TagLib::File(stream), d(new FilePrivate()) {
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if (isOpen())
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read(readProperties);
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}
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APE::File::~File() {
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delete d;
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}
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Strawberry_TagLib::TagLib::Tag *APE::File::tag() const {
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return &d->tag;
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}
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PropertyMap APE::File::setProperties(const PropertyMap &properties) {
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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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APE::AudioProperties *APE::File::audioProperties() const {
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return d->properties.get();
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}
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bool APE::File::save() {
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if (readOnly()) {
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debug("APE::File::save() -- File is read only.");
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return false;
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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 *APE::File::ID3v1Tag(bool create) {
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return d->tag.access<ID3v1::Tag>(ApeID3v1Index, create);
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}
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APE::Tag *APE::File::APETag(bool create) {
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return d->tag.access<APE::Tag>(ApeAPEIndex, create);
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}
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void APE::File::strip(int tags) {
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if (tags & ID3v1)
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d->tag.set(ApeID3v1Index, nullptr);
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if (tags & APE)
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d->tag.set(ApeAPEIndex, nullptr);
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if (!ID3v1Tag())
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APETag(true);
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}
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bool APE::File::hasAPETag() const {
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return (d->APELocation >= 0);
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}
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bool APE::File::hasID3v1Tag() const {
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return (d->ID3v1Location >= 0);
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}
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////////////////////////////////////////////////////////////////////////////////
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// private members
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////////////////////////////////////////////////////////////////////////////////
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void APE::File::read(bool readProperties) {
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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.reset(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(ApeID3v1Index, 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(ApeAPEIndex, 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 APE audio properties
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if (readProperties) {
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long 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.reset(new AudioProperties(this, streamLength));
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}
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}
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