src/plugins/Input/mpeg/decodermpegfactory.cpp



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/***************************************************************************
 *   Copyright (C) 2008-2021 by Ilya Kotov                                 *
 *   forkotov02@ya.ru                                                      *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program 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 General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.         *
 ***************************************************************************/

#include <QDialog>
#include <QMessageBox>
#include <QSettings>
#include <QFile>
#include <QTextCodec>
#include <QtDebug>
#include <taglib/tag.h>
#include <taglib/fileref.h>
#include <taglib/id3v1tag.h>
#include <taglib/id3v2tag.h>
#include <taglib/apetag.h>
#include <taglib/tfile.h>
#include <taglib/mpegfile.h>
#include <taglib/tfilestream.h>
#include <taglib/id3v2tag.h>
#include <taglib/id3v2header.h>
#include <taglib/textidentificationframe.h>
#include <taglib/id3v2framefactory.h>
#include "tagextractor.h"
#include "mpegmetadatamodel.h"
#include "settingsdialog.h"
#ifdef WITH_MAD
#include "decoder_mad.h"
#endif
#ifdef WITH_MPG123
#include "decoder_mpg123.h"
#endif
#include "decodermpegfactory.h"

#define CSTR_TO_QSTR(str,utf) codec->toUnicode(str.toCString(utf)).trimmed()

// DecoderMPEGFactory

DecoderMPEGFactory::DecoderMPEGFactory()
{
    //detecting rusxmms patch
    m_using_rusxmms = false;
    char str[] = { char(0xF2), char(0xE5), char(0xF1), char(0xF2), '\0'};
    QTextCodec *codec = QTextCodec::codecForName("windows-1251");
    TagLib::String tstr(str);
    if(codec->toUnicode(str) == QString::fromUtf8(tstr.toCString(true)))
    {
        qDebug("DecoderMADFactory: found taglib with rusxmms patch");
        m_using_rusxmms = true;
        TagExtractor::setForceUtf8(m_using_rusxmms);
    }
}

bool DecoderMPEGFactory::canDecode(QIODevice *input) const
{
    char buf[8192];
    qint64 dataSize = sizeof(buf);

    if(input->peek(buf, sizeof(buf)) != sizeof(buf))
        return false;

    if (!memcmp(buf, "FLV", 3)) //skip Macromedia Flash Video
        return false;

    if (!memcmp(buf + 8, "WAVE", 4))
        return !memcmp(buf + 20, "U" ,1);

    if(!memcmp(buf, "ID3", 3))
    {
        TagLib::ByteVector byteVector(buf, dataSize);