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Clementine-audio-player-Mac.../3rdparty/libechonest/Song.h

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6.5 KiB
C++

/****************************************************************************************
* Copyright (c) 2010 Leo Franchi <lfranchi@kde.org> *
* *
* 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, see <http://www.gnu.org/licenses/>. *
****************************************************************************************/
#ifndef ECHONEST_SONG_H
#define ECHONEST_SONG_H
#include "echonest_export.h"
#include "Track.h"
#include <QSharedData>
#include <QHash>
#include <QVariant>
#include <QDebug>
#include <QVector>
#include "Config.h"
class QNetworkReply;
class SongData;
namespace Echonest{
class DynamicPlaylist; // forward declare for friend declaration
class AudioSummary;
/**
* This encapsulates an Echo Nest song---use it if you wish to get information about a song,
* search for a song, etc.
*
* This class is implicitly shared.
*/
class ECHONEST_EXPORT Song
{
public:
enum SongInformationFlag {
AudioSummaryInformation = 0x01,
Tracks = 0x02,
Hotttnesss = 0x04,
ArtistHotttnesss = 0x08,
ArtistFamiliarity = 0x10,
ArtistLocation = 0x20
};
Q_DECLARE_FLAGS( SongInformation, SongInformationFlag )
enum SearchParam {
Title,
Artist,
Combined,
Description,
ArtistId,
Results,
MaxTempo,
MinTempo,
MaxDanceability,
MinDanceability,
MaxComplexity,
MinComplexity,
MaxDuration,
MinDuration,
MaxLoudness,
MinLoudness,
MaxFamiliarity,
MinFamiliarity,
MaxHotttnesss,
MinHotttnesss,
MaxLongitude,
MinLongitude,
Mode,
Key,
Sort
};
typedef QPair< Echonest::Song::SearchParam, QVariant > SearchParamData;
typedef QVector< SearchParamData > SearchParams;
Song();
Song( const QByteArray& id, const QString& title, const QByteArray& artistId, const QString& artistName );
Song( const Song& other );
Song& operator=(const Song& song);
~Song();
/**
* The following pieces of data are present in all Song objects, and do not require
* on-demand fetching.
*/
QByteArray id() const;
void setId( const QByteArray& id );
QString title() const;
void setTitle( const QString& title );
QString artistName() const;
void setArtistName( const QString& artistName );
QByteArray artistId() const;
void setArtistId( const QByteArray& artistId );
/**
* The following require fetching from The Echo Nest, so call
* fetchInformation() with the type of data you want first.
*
* If you ask for this information before calling parseInformation()
* with the respective data, the result is undefined.
*/
/**
* The full audio summary and analysis of this song.
*/
AudioSummary audioSummary() const;
void setAudioSummary( const AudioSummary& summary );
/**
* The associated Track objects with acoustic track information
*/
QVector< Track > tracks() const;
void setTracks( const QVector< Track >& tracks );
/**
* The "hotttnesss" metric of this song.
*/
qreal hotttnesss() const;
void setHotttnesss( qreal hotttnesss );
/**
* The "hotttnesss" metric of this song's artist.
*/
qreal artistHotttnesss() const;
void setArtistHotttnesss( qreal artistHotttnesss );
/**
* The familiarity metric of this song's artist.
*/
qreal artistFamiliarity() const;
void setArtistFamiliarity( qreal artistFamiliarity );
/**
* The location of this artist.
*/
QString artistLocation() const;
void setArtistLocation( const QString& artistLocation );
/**
* This fetch the data from The Echo Nest for the requested data, so it
* returns a QNetworkReply*. When the finished() signal is emitted
* from the QNetworkReply object call parseInformation() to save the
* data back to this Song object.
*
*/
QNetworkReply* fetchInformation( SongInformation parts ) const;
/**
* Search for a song from The Echo Nest with the given search parameters. See
* http://developer.echonest.com/docs/v4/song.html#search for a description of the
* parameters and data types.
*
* The result will contain the requested information from the SongInformation flags, and
* can be extracted in the parseSearch() function.
*
*/
static QNetworkReply* search( const SearchParams& params, SongInformation parts );
/**
* Parse the result of the fetchInformation() call.
* For each requested SongInformationFlag in the original request, the respective
* data will be saved to this Song object.
*/
void parseInformation( QNetworkReply* reply ) throw( ParseError );
/**
* Parse the result of the search() call.
*/
static QVector<Song> parseSearch( QNetworkReply* reply ) throw( ParseError );
/**
* Identify a song from a given Echo Nest fingerprint hash code
*
* NOTE this is currently not supported, as the Echo Nest hash code
* generator is not currently open source, so I don't care much
* for it.
*
* static QNetworkReply* identify( ) const;
*/
QString toString() const;
friend class DynamicPlaylist;
private:
static QByteArray searchParamToString( SearchParam param );
static void addQueryInformation( QUrl& url, SongInformation parts );
QSharedDataPointer<SongData> d;
};
typedef QVector< Song > SongList;
ECHONEST_EXPORT QDebug operator<<(QDebug d, const Song &song);
Q_DECLARE_OPERATORS_FOR_FLAGS(Song::SongInformation)
} // namespace
Q_DECLARE_METATYPE( Echonest::Song::SongInformation )
#endif