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Clementine-audio-player-Mac.../3rdparty/libechonest/Playlist.h
2011-11-23 16:10:33 +01:00

281 lines
13 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_PLAYLIST_H
#define ECHONEST_PLAYLIST_H
#include "echonest_export.h"
#include "Song.h"
#include <QSharedData>
#include <QDebug>
#include "Artist.h"
#include <QtCore/QString>
#include "Catalog.h"
class QNetworkReply;
class DynamicPlaylistData;
namespace Echonest{
typedef struct {
qreal served_time;
QByteArray artist_id;
QByteArray id;
QString artist_name;
QString title;
int rating;
} SessionItem;
typedef struct {
TermList terms;
SongList seed_songs;
// description .. what data is in here?
Artists banned_artists;
QVector< QString > rules;
QByteArray session_id;
Artists seeds;
QVector< SessionItem > skipped_songs;
QVector< SessionItem > banned_songs;
QString playlist_type;
Catalogs seed_catalogs;
QVector< SessionItem > rated_songs;
QVector< SessionItem > history;
} SessionInfo;
/**
* This encapsulates an Echo Nest dynamic playlist. It contains a playlist ID and
* the current song, and can fetch the next song.
*
* See http://developer.echonest.com/docs/v4/playlist.html#dynamic
* for more information
*/
class ECHONEST_EXPORT DynamicPlaylist
{
public:
/**
* The types of playlist that can be generated. Artist plays songs for the given artist,
* ArtistRadio takes into account similar artists, and ArtistDescription plays songs matching
* the given description.
*/
enum ArtistTypeEnum {
ArtistType,
ArtistRadioType,
ArtistDescriptionType,
CatalogType,
CatalogRadioType,
SongRadioType
};
/**
* Different ways to sort a generated playlist
*/
enum SortingType {
SortTempoAscending,
SortTempoDescending,
SortDurationAscending,
SortDurationDescending,
SortArtistFamiliarityAscending,
SortArtistFamiliarityDescending,
SortArtistHotttnessAscending,
SortArtistHotttnessDescending,
SortSongHotttnesssAscending,
SortSongHotttnesssDescending,
SortLatitudeAscending,
SortLatitudeDescending,
SortLongitudeAscending,
SortLongitudeDescending,
SortModeAscending,
SortModeDescending,
SortKeyAscending,
SortKeyDescending,
SortLoudnessAscending,
SortLoudnessDescending,
SortEnergyAscending,
SortEnergyDescending,
SortDanceabilityAscending,
SortDanceabilityDescending
};
/**
* Different ways of picking artists in Artist radios.
*/
enum ArtistPick {
PickSongHotttnesssAscending,
PickTempoAscending,
PickDurationAscending,
PickLoudnessAscending,
PickModeAscending,
PickKeyAscending,
PickSongHotttnesssDescending,
PickTempoDescending,
PickDurationDescending,
PickLoudnessDescending,
PickModeDescending,
PickKeyDescending
};
/**
* The various parameters that can be passed to the playlist building
* functions.
*/
enum PlaylistParam {
Type, /// The type of playlist to generate. Value is the DynamicPlaylist::ArtistTypeEnum enum
Format, /// Either xml (default) or xspf. If the result is xspf, the raw xspf playlist is returned, else the xml is parsed and exposed programmatically. If using XSPF, you must specify a catalog, the tracks bucket, and limit = true
Pick, /// How the artists are picked for each artist in ArtistType playlists. Value is Playlist::ArtistPick enum value.
Variety, /// 0 < variety < 1 The maximum variety of artists to be represented in the playlist. A higher number will allow for more variety in the artists.
ArtistId, /// ID(s) of seed artist(s) for the playlist
Artist, /// Artist names of seeds for playlist
ArtistSeedCatalog, /// ID of seed artist catalog for the playlist
SourceCatalog, /// ID of catalog (artist or song) for catalog type playlists
SongId, /// IDs of seed songs for the playlist
Description, /// Textual description for sort of songs that can be included in the playlist
Results, /// 0-100, how many sonsg to include in the playlist, default 15
MaxTempo, /// 0.0 < tempo < 500.0 (BPM) The maximum tempo for any included songs
MinTempo, /// 0.0 < tempo < 500.0 (BPM) the minimum tempo for any included songs
MaxDuration, /// 0.0 < duration < 3600.0 (seconds) the maximum duration of any song on the playlist
MinDuration, /// 0.0 < duration < 3600.0 (seconds) the minimum duration of any song on the playlist
MaxLoudness, /// -100.0 < loudness < 100.0 (dB) the maximum loudness of any song on the playlist
MinLoudness, /// -100.0 < loudness < 100.0 (dB) the minimum loudness of any song on the playlist
MinDanceability, /// 0 < danceability < 1 a measure of the minimum danceability of the song
MaxDanceability, /// 0 < danceability < 1 a measure of the maximum danceability of the song
MinEnergy, /// 0 < danceability < 1 a measure of the maximum energy of the song
MaxEnergy, /// 0 < danceability < 1 a measure of the maximum energy of the song
ArtistMaxFamiliarity, /// 0.0 < familiarity < 1.0 the maximum artist familiarity for songs in the playlist
ArtistMinFamiliarity, /// 0.0 < familiarity < 1.0 the minimum artist familiarity for songs in the playlist
ArtistMaxHotttnesss, /// 0.0 < hotttnesss < 1.0 the maximum hotttnesss for artists in the playlist
ArtistMinHotttnesss, /// 0.0 < hotttnesss < 1.0 the maximum hotttnesss for artists in the playlist
SongMaxHotttnesss, /// 0.0 < hotttnesss < 1.0 the maximum hotttnesss for songs in the playlist
SongMinHotttnesss, /// 0.0 < hotttnesss < 1.0 the maximum hotttnesss for songs in the playlist
ArtistMinLongitude, /// -180.0 < longitude < 180.0 the minimum longitude for the location of artists in the playlist
ArtistMaxLongitude, /// -180.0 < longitude < 180.0 the maximum longitude for the location of artists in the playlist
ArtistMinLatitude, /// -90.0 < latitude < 90.0 the minimum latitude for the location of artists in the playlist
ArtistMaxLatitude, /// -90.0 < latitude < 90.0 the maximum latitude for the location of artists in the playlist
Mode, /// (minor, major) 0, 1 the mode of songs in the playlist
Key, /// (c, c-sharp, d, e-flat, e, f, f-sharp, g, a-flat, a, b-flat, b) 0 - 11 the key of songs in the playlist
SongInformation, /// what sort of song information should be returned. Should be an Echonest::SongInformation object
Sort, /// SortingType enum, the type of sorting to use,
Limit, /// true, false if true songs will be limited to those that appear in the catalog specified by the id: bucket
Audio, /// true, false, if true songs will be limited to those that have associated audio
DMCA, /// true, false Only valid for dynamic playlists. Sets if playlist will follow DMCA rules (see web api doc for details)
ChainXSPF, /// true, false If true, returns an xspf for this dynamic playlist with 2 items. The second item will be a link to the API call for the next track in the chain. Please note that this sidesteps libechonest's handling of the tracks.
Mood, /// A mood to limit this playlist to, for example "happy" or "sad". Multiples of this param are okay. See the method Artist::listTerms for details on what moods are currently available
Style, /// A style to limit this playlist to, for example "happy" or "sad". Multiples of this param are okay. See the method Artist::listTerms for details on what styles are currently available
Adventurousness
};
typedef QPair< PlaylistParam, QVariant > PlaylistParamData;
typedef QVector< PlaylistParamData > PlaylistParams;
/**
* The various controls for a dynamic playlist.
*
* Please see The Echo Nest API documentation for more information
*/
enum DynamicControlItem {
Steer = 0,
SteerDescription,
Rating,
Ban
};
typedef QPair< DynamicControlItem, QString > DynamicControl;
typedef QVector< DynamicControl > DynamicControls;
DynamicPlaylist();
virtual ~DynamicPlaylist();
DynamicPlaylist( const DynamicPlaylist& other );
DynamicPlaylist& operator=( const DynamicPlaylist& playlist );
/**
* Start a dynamic playlist with the given parameters.
* Once the QNetworkReply has finished, pass it to parseStart()
* and the inital song will be populated and returned. The sessionId(), currentSong(),
* and fetchNextSong() methods will then be useful.
*/
QNetworkReply* start( const PlaylistParams& params ) const;
Song parseStart( QNetworkReply* ) throw( ParseError );
/**
* The session id of this dynamic playlist. If the playlist has ended, or has not been started,
* the result is empty.
*
*/
QByteArray sessionId() const;
void setSessionId( const QByteArray& id );
/**
* The current song of this dynamic playlist. Once this song has been played,
* or whenever is desired, call fetchNextSong() to get the next song.
*/
Song currentSong() const;
void setCurrentSong( const Song& song );
/**
* Queries The Echo Nest for the next playable song in this
* dynamic playlist.
*
* Once the query has emitted the finished() signal, pass it to parseNextSong(), which will
* return the new song to play. It will also set the current song to the newly parsed song.
*
* If the playlist has no more songs, the returned song object will be have no name nor id.
*
* @param rating The rating for the song that was just played. Ranges from 1 (lowest) to 5 (highest)
* @param controls The controls to apply when fetching the next track.
*
*/
QNetworkReply* fetchNextSong( int rating = -1 ) const;
QNetworkReply* fetchNextSong( const DynamicControls& controls ) const;
Song parseNextSong( QNetworkReply* reply );
/**
* Returns a description of this dynamic playlist session
*/
QNetworkReply* fetchSessionInfo() const;
SessionInfo parseSessionInfo( QNetworkReply* reply ) throw( ParseError );
/**
* Generate a static playlist, according to the desired criteria. Use parseXSPFPlaylist if
* you pass format=xspf to \c staticPlaylist().
*/
static QNetworkReply* staticPlaylist( const PlaylistParams& params );
static SongList parseStaticPlaylist( QNetworkReply* reply ) throw( ParseError );
/**
* Parse an xspf playlist. Returns the full xspf content with no modifications.
*/
static QByteArray parseXSPFPlaylist( QNetworkReply* reply ) throw( ParseError );
private:
static QByteArray playlistParamToString( PlaylistParam param );
static QNetworkReply* generateInternal( const PlaylistParams& params, const QByteArray& type );
static QByteArray playlistSortToString(SortingType sorting);
static QByteArray playlistArtistPickToString(ArtistPick pick);
static QByteArray dynamicControlToString(DynamicControlItem control);
QSharedDataPointer<DynamicPlaylistData> d;
};
ECHONEST_EXPORT QDebug operator<<(QDebug d, const Echonest::DynamicPlaylist& playlist);
} // namespace
Q_DECLARE_METATYPE( Echonest::DynamicPlaylist )
#endif