157 lines
4.3 KiB
C++
157 lines
4.3 KiB
C++
/**************************************************************************
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copyright : (C) 2007 by Lukáš Lalinský
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email : lalinsky@gmail.com
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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 "tdebug.h"
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#include "tstring.h"
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#include "tpropertymap.h"
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#include "tagutils.h"
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#include "mp4atom.h"
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#include "mp4tag.h"
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#include "mp4file.h"
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using namespace Strawberry_TagLib::TagLib;
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namespace {
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bool checkValid(const MP4::AtomList &list) {
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for (MP4::AtomList::ConstIterator it = list.begin(); it != list.end(); ++it) {
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if ((*it)->length == 0)
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return false;
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if (!checkValid((*it)->children))
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return false;
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}
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return true;
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}
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} // namespace
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class MP4::File::FilePrivate {
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public:
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explicit FilePrivate() : tag(nullptr), atoms(nullptr), properties(nullptr) {}
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~FilePrivate() {
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delete atoms;
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delete tag;
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delete properties;
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}
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MP4::Tag *tag;
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MP4::Atoms *atoms;
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MP4::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 MP4::File::isSupported(IOStream *stream) {
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// An MP4 file has to have an "ftyp" box first.
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const ByteVector id = Utils::readHeader(stream, 8, false);
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return id.containsAt("ftyp", 4);
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}
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////////////////////////////////////////////////////////////////////////////////
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// public members
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////////////////////////////////////////////////////////////////////////////////
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MP4::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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MP4::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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MP4::File::~File() {
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delete d;
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}
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MP4::Tag *
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MP4::File::tag() const {
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return d->tag;
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}
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MP4::AudioProperties *
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MP4::File::audioProperties() const {
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return d->properties;
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}
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void MP4::File::read(bool readProperties) {
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if (!isValid())
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return;
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d->atoms = new Atoms(this);
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if (!checkValid(d->atoms->atoms)) {
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setValid(false);
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return;
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}
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// must have a moov atom, otherwise consider it invalid
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if (!d->atoms->find("moov")) {
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setValid(false);
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return;
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}
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d->tag = new Tag(this, d->atoms);
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if (readProperties) {
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d->properties = new AudioProperties(this, d->atoms);
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}
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}
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bool MP4::File::save() {
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if (readOnly()) {
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debug("MP4::File::save() -- File is read only.");
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return false;
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}
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if (!isValid()) {
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debug("MP4::File::save() -- Trying to save invalid file.");
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return false;
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}
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return d->tag->save();
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}
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bool MP4::File::hasMP4Tag() const {
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return (d->atoms->find("moov", "udta", "meta", "ilst") != nullptr);
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}
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