qmmp3info.cpp

可以播放MP3,wma等文件格式的播放器

/* qmmp3info.cpp
 *
 * $Id: qmmp3info.cpp,v 1.8.2.2 2002/09/23 19:26:51 kyllingstad Exp $
 *
 * Apollo sound player: http://www.apolloplayer.org
 * Copyright(C) 2000-2002 Apollo Team.  See CREDITS file.
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * The GNU General Public License is also available online at:
 *
 * http://www.gnu.org/copyleft/gpl.html
 */

#ifdef ENABLE_ID3

#include "qmmp3info.h"
#include "util.h"

#include <iostream>
#include <stdlib.h>
#include <id3/misc_support.h>

/*!
  \class QmMp3Info qmmp3info.h
  \brief Provides functionality to retrieve ID3 fields.
*/


/*!
  Creates an MP3 information object to retrieve information from \a filename.
*/

QmMp3Info::QmMp3Info(
	const QString &filename)
	: QmSongInfo(),
      m_Filename(filename)
{
	m_pTag = new ID3_Tag(m_Filename);

    ID3_Tag::Iterator *i = m_pTag->CreateIterator();
    ID3_Frame* frame = 0;
    const char *tmp;
	QString temp;
	for (int i=0; i<QmSongInfo::Fields; ++i)
		m_Fields[i] = blank();

	int len = getMp3LengthInSeconds(filename);
	if (len != -1)
		m_Fields[Length] = QString::number(len);

	// rk: the heuristics could stand improvement:
	if (filename.contains("various", false))
		m_Fields[MultiArtist] = "1";
	
    /*
    cout << "id3lib version: "
         << ID3LIB_MAJOR_VERSION << "."
         << ID3LIB_MINOR_VERSION << "."
         << ID3LIB_PATCH_VERSION << std::endl;
    */
	
    while ((frame = i->GetNext()))
    {
		tmp = 0;
		
        switch(frame->GetID())
		{
        case ID3FID_ALBUM:
			tmp = frame->GetField(ID3FN_TEXT)->GetRawText();
			if(tmp)
				m_Fields[QmSongInfo::Album] = QString(tmp);
			break;
			
        case ID3FID_TITLE:
			tmp = frame->GetField(ID3FN_TEXT)->GetRawText();
			if(tmp)
				m_Fields[QmSongInfo::Title] = QString(tmp);
			break;
			
        case ID3FID_BAND:
			break;
			
        case ID3FID_LEADARTIST:
			tmp = frame->GetField(ID3FN_TEXT)->GetRawText();
			if(tmp)
				m_Fields[QmSongInfo::Artist] = QString(tmp);
			break;

		case ID3FID_CONTENTTYPE:
			tmp = frame->GetField(ID3FN_TEXT)->GetRawText();
			if (*tmp == '(')
			{
				char* end;
				long genre = strtol(tmp+1, &end, 10);
				if (genre==LONG_MIN || genre==LONG_MAX || end==(tmp+1))
					break;
				if (genre>=0 && genre<126)
					m_Fields[QmSongInfo::Genre] == genres[genre];
				/*! \todo read refinement */
			}
			else
				m_Fields[QmSongInfo::Genre] = QString(tmp);
			break;
			
        case ID3FID_TRACKNUM: 
 			tmp = frame->GetField(ID3FN_TEXT)->GetRawText();
 			if(tmp)
			{
				char *end;
				long num = strtol(tmp, &end, 10);
				if (num!=LONG_MIN && num!=LONG_MAX && end!=tmp)
					m_Fields[QmSongInfo::Track] = QString::number(num);
 				/*! \todo read refinement and store it in songitem */
 			}
			break;

        case ID3FID_SONGLEN:
            tmp = frame->GetField(ID3FN_TEXT)->GetRawText();
			
            if(tmp)
			{
                bool ok;
				long len = QString(tmp).toLong(&ok) / 1000;

				if(ok)
					m_Fields[QmSongInfo::Length] =  QString::number(len);
            }
            break;

		case ID3FID_YEAR:
			tmp = frame->GetField(ID3FN_TEXT)->GetRawText();
            if(tmp)
				m_Fields[QmSongInfo::Year] = QString(tmp);
            break;

		case ID3FID_COMMENT:
			tmp = frame->GetField(ID3FN_TEXT)->GetRawText();
			if(tmp)
				m_Fields[QmSongInfo::Comment] = QString(tmp);
			break;

        default:
			break;
        }
    }
	
    delete i;
}


QmMp3Info::QmMp3Info(const QmMp3Info &/*other*/)
    : QmSongInfo()
{
}

QmMp3Info& QmMp3Info::operator=(const QmMp3Info &/*rhs*/)
{
    return *this;
}


/*!

*/

QmMp3Info::~QmMp3Info()
{
	delete m_pTag;
}


/*!
  \return The value of the field \a f, or blank if the field does not exist.
 */

const QString&
QmMp3Info::get(
	Field f) const
{
	return m_Fields[f];
}


// list from: http://www.id3.org/id3v2.3.0.html
const char*
QmMp3Info::genres[] =
{"Blues",
"Classic Rock",
"Country",
"Dance",
"Disco",
"Funk",
"Grunge",
"Hip-Hop",
"Jazz",
"Metal",
"New Age",
"Oldies",
"Other",
"Pop",
"R&B",
"Rap",
"Reggae",
"Rock",
"Techno",
"Industrial",
"Alternative",
"Ska",
"Death Metal",
"Pranks",
"Soundtrack",
"Euro-Techno",
"Ambient",
"Trip-Hop",
"Vocal",
"Jazz+Funk",
"Fusion",
"Trance",
"Classical",
"Instrumental",
"Acid",
"House",
"Game",
"Sound Clip",
"Gospel",
"Noise",
"AlternRock",
"Bass",
"Soul",
"Punk",
"Space",
"Meditative",
"Instrumental Pop",
"Instrumental Rock",
"Ethnic",
"Gothic",
"Darkwave",
"Techno-Industrial",
"Electronic",
"Pop-Folk",
"Eurodance",
"Dream",
"Southern Rock",
"Comedy",
"Cult",
"Gangsta",
"Top 40",
"Christian Rap",
"Pop/Funk",
"Jungle",
"Native American",
"Cabaret",
"New Wave",
"Psychadelic",
"Rave",
"Showtunes",
"Trailer",
"Lo-Fi",
"Tribal",
"Acid Punk",
"Acid Jazz",
"Polka",
"Retro",
"Musical",
"Rock & Roll",
"Hard Rock",
"Folk",
"Folk-Rock",
"National Folk",
"Swing",
"Fast Fusion",
"Bebob",
"Latin",
"Revival",
"Celtic",
"Bluegrass",
"Avantgarde",
"Gothic Rock",
"Progressive Rock",
"Psychedelic Rock",
"Symphonic Rock",
"Slow Rock",
"Big Band",
"Chorus",
"Easy Listening",
"Acoustic",
"Humour",
"Speech",
"Chanson",
"Opera",
"Chamber Music",
"Sonata",
"Symphony",
"Booty Bass",
"Primus",
"Porn Groove",
"Satire",
"Slow Jam",
"Club",
"Tango",
"Samba",
"Folklore",
"Ballad",
"Power Ballad",
"Rhythmic Soul",
"Freestyle",
"Duet",
"Punk Rock",
"Drum Solo",
"A capella",
"Euro-House",
"Dance Hall"};

#endif // ENABLE_ID3