499 lines
20 KiB
C++
499 lines
20 KiB
C++
/*
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* Copyright (C) 2017 Kevin Whitaker <eyecreate@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* 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
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include "GroovePlayer.h"
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#include "db/UserAction.h"
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#include <Wt/WLogger>
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#include <Wt/WServer>
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#include <Wt/WApplication>
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#include "WebInterface.h"
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#include <locale>
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#include <Wt/WLogger>
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#include <Wt/Dbo/Transaction>
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#include <groovefingerprinter/fingerprinter.h>
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#include <grooveplayer/player.h>
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GroovePlayerMgr::GroovePlayerMgr (std::string dbFile) : sqliteConnection(dbFile), connectionPool(&sqliteConnection, 3)
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{
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musicScanDir = std::filesystem::current_path()/"music";
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Wt::Dbo::Session sqlSession;
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sqlSession.setConnectionPool(connectionPool);
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sqlSession.mapClass<User>("user");
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sqlSession.mapClass<AudioTrack>("tracks");
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sqlSession.mapClass<UserAction>("actions");
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try
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{
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sqlSession.createTables();
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} catch(Wt::Dbo::Exception e)
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{
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Wt::log("info") << "Using Existing DB.";
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}
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groove_init();
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/*bool emptyTrackListing = false;
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{
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Wt::Dbo::Transaction transaction(sqlSession);
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int trackCount = sqlSession.query<int>("select count(fingerprint) from tracks");
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emptyTrackListing = trackCount==0;
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}
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if(emptyTrackListing)
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{
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grooveAudioScanner = new std::thread([this](){grooveAudioScannerLoop();});
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grooveEvents = new std::thread([this](){while(!this->finishedLaunchScan){std::this_thread::sleep_for(std::chrono::milliseconds(200));}[this](){grooveEventLoop();};});
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}
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else
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{*/
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grooveAudioScanner = new std::thread([this](){grooveAudioScannerLoop();});
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grooveEvents = new std::thread([this](){grooveEventLoop();});
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//}
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}
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std::list<const AudioTrack*> GroovePlayerMgr::getNextVoteBatch(Wt::Dbo::Session* session)
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{
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/**
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* This method will attempt to pick 3 tracks that will be up for selection next.
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*
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* The first track should be from the same album or artist.
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* The second track should be from the same genre.
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* The third track should be from something in a different genre.
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*
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* What is picked inside those requirements is a mix of random and TODO:based on past user actions(33% of time).
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*
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* The third track will be replaced by a recent request item if one exists.
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*/
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std::list<const AudioTrack*> selectedTracks;
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Wt::Dbo::Transaction transaction(*session);
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//First make sure there are at least 3 tracks to suggest.
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int trackCount = session->query<int>("select count(fingerprint) from tracks");
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if(trackCount < 3)
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{
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//Return empty list to show there are not enough tracks to allow voting.
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return selectedTracks;
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}
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//Determine first track
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int trackAlbumCount = session->query<int>("select count(fingerprint) from tracks").where("album = ?").bind(getCurrentTrack(session)->trackAlbumName);
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int trackArtistCount = session->query<int>("select count(fingerprint) from tracks").where("artist = ?").bind(getCurrentTrack(session)->trackArtistName);
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int computerSlightOfHand = rand() % 10 + 1;
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if(trackAlbumCount > 0 && computerSlightOfHand > 3)
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{
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//Pick item from album
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Wt::Dbo::ptr<AudioTrack> eligibleTrack = session->find<AudioTrack>().where("album = ?").limit(1).offset(rand() % trackAlbumCount).bind(getCurrentTrack(session)->trackAlbumName);
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selectedTracks.push_back(eligibleTrack.get());
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}
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else if(trackArtistCount > 0)
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{
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//Pick item from artist
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Wt::Dbo::ptr<AudioTrack> eligibleTrack = session->find<AudioTrack>().where("artist = ?").limit(1).offset(rand() % trackArtistCount).bind(getCurrentTrack(session)->trackArtistName);
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selectedTracks.push_back(eligibleTrack.get());
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}
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//Determine second track
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int trackGenreCount = session->query<int>("select count(fingerprint) from tracks").where("genre = ?").bind(getCurrentTrack(session)->trackGenre);
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if(trackGenreCount > 0)
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{
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//Pick item from genre
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Wt::Dbo::ptr<AudioTrack> eligibleTrack = session->find<AudioTrack>().where("genre = ?").limit(1).offset(rand() % trackGenreCount).bind(getCurrentTrack(session)->trackGenre);
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selectedTracks.push_back(eligibleTrack.get());
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}
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//Determine third track
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int trackNotGenreCount = session->query<int>("select count(fingerprint) from tracks").where("genre != ?").bind(getCurrentTrack(session)->trackGenre);
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if(requestQueue.size() > 0)
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{
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//There's a request. Pick one up front and put as third item.
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selectedTracks.push_back(requestQueue.front());
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}
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else if(trackNotGenreCount > 0)
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{
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//Pick from other genre
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Wt::Dbo::ptr<AudioTrack> eligibleTrack = session->find<AudioTrack>().where("genre != ?").limit(1).offset(rand() % trackNotGenreCount).bind(getCurrentTrack(session)->trackGenre);
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selectedTracks.push_back(eligibleTrack.get());
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}
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else
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{
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//Pick randomly
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Wt::Dbo::ptr<AudioTrack> eligibleTrack = session->find<AudioTrack>().limit(1).offset(rand() % trackCount);
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selectedTracks.push_back(eligibleTrack.get());
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}
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return selectedTracks;
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}
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void GroovePlayerMgr::grooveEventLoop()
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{
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/**
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* On first boot, random track that has been voted before will start(or random if no track has been played before).
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* When voting ends, if no vote was cast, the first will be picked 60% of the time with second being 30% of the time and third being picked 10% of the time.
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* Exception is if third track is the top request, then it is picked. If another song is voted over this, it will be put in back of request queue.
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*/
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Wt::Dbo::Session sqlSession;
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sqlSession.setConnectionPool(connectionPool);
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sqlSession.mapClass<User>("user");
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sqlSession.mapClass<AudioTrack>("tracks");
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sqlSession.mapClass<UserAction>("actions");
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Wt::Dbo::Transaction transaction(sqlSession);
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//Wait until at least one track is in DB.
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if(sqlSession.query<int>("select count(fingerprint) from tracks") < 1)
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{
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while(sqlSession.query<int>("select count(fingerprint) from tracks") < 1){}
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}
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//Pick initial track to bootstrap.
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int tracksPlayedBefore = sqlSession.query<int>("select count(fingerprint) from tracks as t join actions on (actions.action = 3 or actions.action = 2) and actions.track_id = t.id");
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const AudioTrack* selectedTrack;
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if (tracksPlayedBefore > 0)
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{
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selectedTrack = sqlSession.query<Wt::Dbo::ptr<AudioTrack>>("select t from tracks as t join actions on (actions.action = 3 or actions.action = 2) and actions.track_id = t.id").limit(1).offset(rand() % tracksPlayedBefore).resultValue().get();
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}
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else
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{
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int trackCount = sqlSession.query<int>("select count(fingerprint) from tracks");
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selectedTrack = sqlSession.find<AudioTrack>().limit(1).offset(rand() % trackCount).resultValue().get();
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}
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struct GroovePlaylist* playlist = groove_playlist_create();
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currentPlaylist = playlist;
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struct GroovePlayer* player = groove_player_create();
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if(!player) {return;}
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currentPlayer = player;
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groove_playlist_insert(playlist, groove_file_open(selectedTrack->trackPath.c_str()),1.0,1.0,nullptr);
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//Now boostrap player with initial data
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groove_player_attach(player, playlist);
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groove_playlist_play(playlist);
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Wt::WServer::instance()->postAll([&]() {
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Wt::WApplication* app = Wt::WApplication::instance();
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if(app != nullptr)
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{
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static_cast<WebInterface*>(app)->songChangedFromServer(getCurrentTrack(&sqlSession).get());
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}
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}
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);
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//Now start loop
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while(getInstance()->continueEventLoop)
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{
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std::this_thread::sleep_for(std::chrono::milliseconds(200));
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PlayerEvents event = getNextPlayerEvent(&sqlSession);
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if(event == NOTHING)
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{
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continue;
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}
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else if(event == GROOVE_NOWPLAYING)
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{
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//Pick new batch of tracks to vote on and inform UI of update.
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currentVoteBatch = getNextVoteBatch(&sqlSession);
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currentVoteStatus = std::map<const AudioTrack*, int>();
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std::for_each(currentVoteBatch.begin(),currentVoteBatch.end(),[&](const AudioTrack* item){
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currentVoteStatus.insert(std::pair<const AudioTrack*, int>(item,0));
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});
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Wt::WServer::instance()->postAll([&]() {
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Wt::WApplication* app = Wt::WApplication::instance();
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if(app != nullptr)
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{
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static_cast<WebInterface*>(app)->songChangedFromServer(getCurrentTrack(&sqlSession).get());
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static_cast<WebInterface*>(app)->voteTracksUpdatedFromServer(currentVoteBatch);
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}
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}
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);
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Wt::log("info") << "Track playing changed to: " << getCurrentTrack(&sqlSession).get()->trackName;
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}
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else if(event == VOTING_ENDED)
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{
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//Look at votes and add correct track to end of playlist.
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//If more than one track has highest votes, pick random. TODO:maybe base off of other play data instead.
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std::list<std::pair<const AudioTrack*,int>> trackWinners;
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for(std::map<const AudioTrack*,int>::iterator track = currentVoteStatus.begin(); track != currentVoteStatus.end(); track++)
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{
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//There nothing yet and there was at least a vote is an initial winner.
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if(trackWinners.size() == 0 && track->second > 0)
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{
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trackWinners.push_back(std::pair<const AudioTrack*, int>(track->first,track->second));
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continue;
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}
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//If there is a winner. Check if higher. If so, clear the list and add this one. If equal, add to list.
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if(trackWinners.size() > 0)
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{
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if(trackWinners.front().second < track->second)
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{
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trackWinners.clear();
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trackWinners.push_back(std::pair<const AudioTrack*,int>(track->first, track->second));
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}
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else if(trackWinners.front().second == track->second)
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{
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trackWinners.push_back(std::pair<const AudioTrack*, int>(track->first, track->second));
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}
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}
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}
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const AudioTrack* winner;
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//Randomly pick from winners(in case of tie), if there are any.
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if(trackWinners.size() > 0)
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{
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auto iter = trackWinners.begin();
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std::advance(iter,rand() % trackWinners.size());
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winner = (*iter).first;
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//Deal with requests if there are any.
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if(requestQueue.size() > 0)
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{
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//If winning track was a request, now you can remove it from request queue.
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if(requestQueue.front()->trackFingerprint == winner->trackFingerprint)
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{
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requestQueue.pop_front();
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}
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//Request didn't win. Put request at bottom of queue.
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else
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{
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requestQueue.push_back(requestQueue.front());
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requestQueue.pop_front();
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}
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}
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}
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else
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{
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//Pick request song if there are any.
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if(requestQueue.size() > 0)
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{
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winner = requestQueue.front();
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requestQueue.pop_front();
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}
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else
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{
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//Pick based on percentages.
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int pick = rand() % 10 +1;
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if(pick <= 6)
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{
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//First track wins
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winner = currentVoteBatch.front();
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}
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else if(pick <= 9)
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{
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//Second track wins.
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winner = (*currentVoteBatch.begin()++);
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}
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else
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{
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//Third track wins
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winner = (*currentVoteBatch.begin()+=2);
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}
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}
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}
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groove_playlist_insert(currentPlaylist,groove_file_open(winner->trackPath.c_str()),1.0,1.0,nullptr);
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Wt::log("info")<< "Voting has ended. Next track is: " << winner->trackName;
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}
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else if(event == VOTE_CAST)
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{
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//
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}
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else if(event == PLAYING_PAUSED)
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{
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//
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}
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else if(event == PLAYING_RESUMED)
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{
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//
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}
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else if(event == SKIP_REQUESTED)
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{
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//
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}
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else if(event == SKIP_VOTE_CAST)
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{
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//
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}
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else if(event == SKIP_VOTING_ENDED)
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{
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//
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}
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else if(event == ADMIN_FORCE_SKIP)
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{
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//
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}
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//TODO
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}
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currentPlaylist = nullptr;
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currentPlayer = nullptr;
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groove_player_detach(player);
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groove_player_destroy(player);
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groove_playlist_destroy(playlist);
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}
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void GroovePlayerMgr::shutdown()
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{
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continueEventLoop = false;
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}
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GroovePlayerMgr::PlayerEvents GroovePlayerMgr::getNextPlayerEvent(Wt::Dbo::Session* session)
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{
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double timeIntoTrack;
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groove_player_position(currentPlayer,nullptr,&timeIntoTrack);
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if(getCurrentTrack(session).get() != nullptr && getCurrentTrack(session)->trackLengthSeconds-timeIntoTrack < 3)
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{
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return VOTING_ENDED;
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}
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GroovePlayerEvent event;
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if(groove_player_event_get(this->currentPlayer,&event, 0) > 0)
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{
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if(event.type == GROOVE_EVENT_NOWPLAYING)
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{
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return GROOVE_NOWPLAYING;
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}
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}
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if(lastInternalEvents.size() > 0)
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{
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PlayerEvents event = lastInternalEvents.front();
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lastInternalEvents.pop_front();
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return event;
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}
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return NOTHING;
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}
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Wt::Dbo::ptr<AudioTrack> GroovePlayerMgr::getCurrentTrack(Wt::Dbo::Session* session)
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{
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Wt::Dbo::Transaction transaction(*session);
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GroovePlaylistItem* currentItem;
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groove_player_position(this->currentPlayer,¤tItem,nullptr);
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if(currentItem != nullptr)
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{
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Wt::Dbo::ptr<AudioTrack> track = session->find<AudioTrack>().where("path = ?").bind(currentItem->file->filename);
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return track;
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}
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return Wt::Dbo::ptr<AudioTrack>();
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}
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bool GroovePlayerMgr::addFileToTrackDBIfTagged(Wt::Dbo::Session* session, std::filesystem::path file)
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{
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//Now check if tags exist and put into DB.
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struct GrooveFile* gfile = groove_file_open(file.c_str());
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struct GrooveTag* artist_tag = groove_file_metadata_get(gfile, "artist", nullptr, 0);
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struct GrooveTag* album_tag = groove_file_metadata_get(gfile, "album", nullptr, 0);
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struct GrooveTag* name_tag = groove_file_metadata_get(gfile, "title", nullptr, 0);
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struct GrooveTag* genre_tag = groove_file_metadata_get(gfile, "genre", nullptr, 0);
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if(artist_tag == nullptr || album_tag == nullptr || name_tag == nullptr || genre_tag == nullptr)
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{
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//Only accept song with all metadata for DB.
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groove_file_close(gfile);
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return false;
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}
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//Take fingerprint and compare to DB.
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struct GrooveFingerprinter* fingerprinter = groove_fingerprinter_create();
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struct GrooveFingerprinterInfo info;
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struct GroovePlaylist* playlist = groove_playlist_create();
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groove_playlist_insert(playlist,gfile,1.0,1.0,nullptr);
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groove_fingerprinter_attach(fingerprinter, playlist);
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groove_fingerprinter_info_get(fingerprinter, &info, 1);
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double trackLen = info.duration;
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char* encodedFP;
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groove_fingerprinter_encode(info.fingerprint,info.fingerprint_size,&encodedFP);
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std::string fingerprint = std::string(encodedFP);
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groove_fingerprinter_dealloc(encodedFP);
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groove_fingerprinter_free_info(&info);
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groove_fingerprinter_detach(fingerprinter);
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groove_fingerprinter_destroy(fingerprinter);
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groove_playlist_destroy(playlist);
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Wt::Dbo::Transaction transaction(*session);
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int existing = session->query<int>("select count(fingerprint) from tracks").where("fingerprint = ?").bind(fingerprint);
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if(existing >0)
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{
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//This track has a duplicate already.
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groove_file_close(gfile);
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return false;
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}
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//Add to DB.
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AudioTrack* newTrack = new AudioTrack();
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newTrack->trackName = groove_tag_value(name_tag);
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newTrack->trackAlbumName = groove_tag_value(album_tag);
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newTrack->trackArtistName = groove_tag_value(artist_tag);
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newTrack->trackGenre = groove_tag_value(genre_tag);
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newTrack->trackLengthSeconds = trackLen;
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newTrack->trackFingerprint = fingerprint;
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newTrack->trackPath = file.string();
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session->add(newTrack);
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groove_file_close(gfile);
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return true;
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}
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void GroovePlayerMgr::removeOrphanedTracks(Wt::Dbo::Session* session)
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{
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Wt::Dbo::Transaction transaction(*session);
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Wt::Dbo::collection<Wt::Dbo::ptr<AudioTrack>> tracks = session->find<AudioTrack>();
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for(Wt::Dbo::collection<Wt::Dbo::ptr<AudioTrack>>::const_iterator i = tracks.begin(); i != tracks.end(); ++i)
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{
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if(!std::filesystem::exists(std::filesystem::path((*i)->trackPath)))
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{
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Wt::Dbo::ptr<AudioTrack> item = session->find<AudioTrack>().where("fingerprint = ?").bind((*i)->trackFingerprint);
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Wt::log("info") << (*i)->trackPath + " not found in filesystem. Removed from DB.";
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item.remove();
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}
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}
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}
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void GroovePlayerMgr::grooveAudioScannerLoop()
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{
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Wt::Dbo::Session sqlSession;
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sqlSession.setConnectionPool(connectionPool);
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sqlSession.mapClass<User>("user");
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sqlSession.mapClass<AudioTrack>("tracks");
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sqlSession.mapClass<UserAction>("actions");
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if(!std::filesystem::exists(musicScanDir))
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{
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std::filesystem::create_directory(musicScanDir);
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Wt::log("info") << "Directory "+std::filesystem::canonical(musicScanDir).string()+" didn't exist, so created.";
|
|
} else
|
|
{
|
|
Wt::log("info") << "Directory "+std::filesystem::canonical(musicScanDir).string()+" exists.";
|
|
}
|
|
for(std::filesystem::directory_entry p: std::filesystem::directory_iterator(musicScanDir))
|
|
{
|
|
std::string extensionLowered;
|
|
for(auto elem : p.path().extension().string())
|
|
{
|
|
extensionLowered.push_back(std::tolower(elem));
|
|
}
|
|
if(extensionLowered == ".mp3") //TODO:think about supporting more than mp3s.
|
|
{
|
|
if(addFileToTrackDBIfTagged(&sqlSession, p.path()))
|
|
{
|
|
Wt::log("info") << p.path().string() << " was added to DB";
|
|
}
|
|
}
|
|
else
|
|
{
|
|
Wt::log("info") << p.path().string() + " was not an accepted audio file.";
|
|
}
|
|
}
|
|
//Now check for tracks in DB without a file.
|
|
removeOrphanedTracks(&sqlSession);
|
|
finishedLaunchScan = true;
|
|
}
|
|
|