201 lines
10 KiB
C
201 lines
10 KiB
C
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/****************************************************************************************
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* Copyright (c) 2010 Leo Franchi <lfranchi@kde.org> *
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* *
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* This program is free software; you can redistribute it and/or modify it under *
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* the terms of the GNU General Public License as published by the Free Software *
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* Foundation; either version 2 of the License, or (at your option) any later *
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* version. *
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* *
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* This program is distributed in the hope that it will be useful, but WITHOUT ANY *
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A *
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* PARTICULAR PURPOSE. See the GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License along with *
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* this program. If not, see <http://www.gnu.org/licenses/>. *
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****************************************************************************************/
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#ifndef ECHONEST_PLAYLIST_H
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#define ECHONEST_PLAYLIST_H
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#include "echonest_export.h"
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#include "Song.h"
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#include <QSharedData>
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#include <QDebug>
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class QNetworkReply;
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class DynamicPlaylistData;
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namespace Echonest{
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/**
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* This encapsulates an Echo Nest dynamic playlist. It contains a playlist ID and
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* the current song, and can fetch the next song.
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*
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* See http://developer.echonest.com/docs/v4/playlist.html#dynamic
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* for more information
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*/
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class ECHONEST_EXPORT DynamicPlaylist
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{
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public:
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/**
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* The types of playlist that can be generated. Artist plays songs for the given artist,
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* ArtistRadio takes into account similar artists, adn ArtistDescription plays songs matching
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* the given description.
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*/
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enum ArtistTypeEnum {
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ArtistType,
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ArtistRadioType,
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ArtistDescriptionType
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};
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/**
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* Different ways to sort a generated playlist
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*/
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enum SortingType {
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SortTempoAscending,
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SortTempoDescending,
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SortDurationAscending,
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SortDurationDescending,
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SortArtistFamiliarityAscending,
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SortArtistFamiliarityDescending,
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SortArtistHotttnessAscending,
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SortArtistHotttnessDescending,
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SortSongHotttnesssAscending,
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SortSongHotttnesssDescending,
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SortLatitudeAscending,
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SortLatitudeDescending,
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SortLongitudeAscending,
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SortLongitudeDescending,
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SortModeAscending,
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SortModeDescending,
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SortKeyAscending,
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SortKeyDescending
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};
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/**
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* Different ways of picking artists in Artist radios.
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*/
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enum ArtistPick {
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PickSongHotttnesssAscending,
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PickTempoAscending,
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PickDurationAscending,
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PickLoudnessAscending,
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PickModeAscending,
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PickKeyAscending,
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PickSongHotttnesssDescending,
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PickTempoDescending,
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PickDurationDescending,
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PickLoudnessDescending,
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PickModeDescending,
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PickKeyDescending
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};
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/**
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* The various parameters that can be passed to the playlist building
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* functions.
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*/
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enum PlaylistParam {
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Type, /// The type of playlist to generate. Value is the DynamicPlaylist::ArtistTypeEnum enum
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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.
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Pick, /// How the artists are picked for each artist in ArtistType playlists. Value is Playlist::ArtistPick enum value.
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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.
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ArtistId, /// ID(s) of seed artist(s) for the playlist
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Artist, /// Artist names of seeds for playlist
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SongId, /// IDs of seed songs for the playlist
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Description, /// Textual description for sort of songs that can be included in the playlist
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Results, /// 0-100, how many sonsg to include in the playlist, default 15
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MaxTempo, /// 0.0 < tempo < 500.0 (BPM) The maximum tempo for any included songs
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MinTempo, /// 0.0 < tempo < 500.0 (BPM) the minimum tempo for any included songs
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MaxDuration, /// 0.0 < duration < 3600.0 (seconds) the maximum duration of any song on the playlist
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MinDuration, /// 0.0 < duration < 3600.0 (seconds) the minimum duration of any song on the playlist
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MaxLoudness, /// -100.0 < loudness < 100.0 (dB) the maximum loudness of any song on the playlist
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MinLoudness, /// -100.0 < loudness < 100.0 (dB) the minimum loudness of any song on the playlist
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ArtistMaxFamiliarity, /// 0.0 < familiarity < 1.0 the maximum artist familiarity for songs in the playlist
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ArtistMinFamiliarity, /// 0.0 < familiarity < 1.0 the minimum artist familiarity for songs in the playlist
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ArtistMaxHotttnesss, /// 0.0 < hotttnesss < 1.0 the maximum hotttnesss for artists in the playlist
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ArtistMinHotttnesss, /// 0.0 < hotttnesss < 1.0 the maximum hotttnesss for artists in the playlist
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SongMaxHotttnesss, /// 0.0 < hotttnesss < 1.0 the maximum hotttnesss for songs in the playlist
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SongMinHotttnesss, /// 0.0 < hotttnesss < 1.0 the maximum hotttnesss for songs in the playlist
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ArtistMinLongitude, /// -180.0 < longitude < 180.0 the minimum longitude for the location of artists in the playlist
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ArtistMaxLongitude, /// -180.0 < longitude < 180.0 the maximum longitude for the location of artists in the playlist
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ArtistMinLatitude, /// -90.0 < latitude < 90.0 the minimum latitude for the location of artists in the playlist
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ArtistMaxLatitude, /// -90.0 < latitude < 90.0 the maximum latitude for the location of artists in the playlist
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Mode, /// (minor, major) 0, 1 the mode of songs in the playlist
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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
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SongInformation, /// what sort of song information should be returned. Should be an Echonest::Song::SongInformation object
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Sort, /// SortingType enum, the type of sorting to use,
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Limit, /// true, false if true songs will be limited to those that appear in the catalog specified by the id: bucket
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Audio, /// true, false, if true songs will be limited to those that have associated audio
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DMCA /// true, false Only valid for dynamic playlists. Sets if playlist will follow DMCA rules (see web api doc for details)
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};
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typedef QPair< PlaylistParam, QVariant > PlaylistParamData;
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typedef QVector< PlaylistParamData > PlaylistParams;
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DynamicPlaylist();
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~DynamicPlaylist();
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DynamicPlaylist( const DynamicPlaylist& other );
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DynamicPlaylist& operator=( const DynamicPlaylist& playlist );
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/**
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* Start a dynamic playlist with the given parameters.
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* Once the QNetworkReply has finished, pass it to parseStart()
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* and the inital song will be populated and returned. The sessionId(), currentSong(),
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* and fetchNextSong() methods will then be useful.
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*/
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QNetworkReply* start( const PlaylistParams& params );
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Song parseStart( QNetworkReply* ) throw( ParseError );
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/**
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* The session id of this dynamic playlist. If the playlist has ended, or has not been started,
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* the result is empty.
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*
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*/
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QByteArray sessionId() const;
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void setSessionId( const QByteArray& id );
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/**
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* The current song of this dynamic playlist. Once this song has been played,
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* or whenever is desired, call fetchNextSong() to get the next song.
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*/
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Song currentSong() const;
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void setCurrentSong( const Song& song );
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/**
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* Queries The Echo Nest for the next playable song in this
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* dynamic playlist.
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*
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* Once the query has emitted the finished() signal, pass it to parseNextSong(), which will
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* return the new song to play. It will also set the current song to the newly parsed song.
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*
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* If the playlist has no more songs, the returned song object will be have no name nor id.
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*
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* @param rating The rating for the song that was just played. Ranges from 1 (lowest) to 5 (highest)
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*
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*/
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QNetworkReply* fetchNextSong( int rating = -1);
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Song parseNextSong( QNetworkReply* reply );
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/**
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* Generate a static playlist, according to the desired criteria.
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*/
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static QNetworkReply* staticPlaylist( const PlaylistParams& params );
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static SongList parseStaticPlaylist( QNetworkReply* reply ) throw( ParseError );
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private:
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static QByteArray playlistParamToString( PlaylistParam param );
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static QNetworkReply* generateInternal( const PlaylistParams& params, const QByteArray& type );
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static QByteArray playlistSortToString(SortingType sorting);
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static QByteArray playlistArtistPickToString(ArtistPick pick);
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QSharedDataPointer<DynamicPlaylistData> d;
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};
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ECHONEST_EXPORT QDebug operator<<(QDebug d, const Echonest::DynamicPlaylist& playlist);
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} // namespace
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#endif
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