2010-03-24 00:11:46 +01:00
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/* This file is part of Clementine.
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Clementine 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 3 of the License, or
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(at your option) any later version.
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Clementine 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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You should have received a copy of the GNU General Public License
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along with Clementine. If not, see <http://www.gnu.org/licenses/>.
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*/
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2009-12-24 20:16:07 +01:00
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//Copyright: (C) 2003 Mark Kretschmann
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// (C) 2004 Max Howell, <max.howell@methylblue.com>
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//License: See COPYING
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#ifndef AMAROK_ENGINEBASE_H
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#define AMAROK_ENGINEBASE_H
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#include <QUrl>
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#include <QObject>
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#include <QList>
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#include <sys/types.h>
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#include <vector>
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2010-04-12 02:26:16 +02:00
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#include <boost/noncopyable.hpp>
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2009-12-24 20:16:07 +01:00
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2010-04-12 01:24:03 +02:00
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#include "engine_fwd.h"
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2010-04-12 01:24:03 +02:00
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namespace Engine {
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2010-04-12 01:24:03 +02:00
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typedef std::vector<int16_t> Scope;
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2010-04-12 02:26:16 +02:00
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class Base : public QObject, boost::noncopyable {
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Q_OBJECT
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public:
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virtual ~Base();
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virtual bool Init() = 0;
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virtual bool CanDecode(const QUrl &url) = 0;
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2010-04-21 15:55:30 +02:00
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virtual void StartPreloading(const QUrl&) {}
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virtual bool Play(uint offset = 0) = 0;
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virtual void Stop() = 0;
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virtual void Pause() = 0;
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virtual void Unpause() = 0;
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virtual void Seek( uint ms ) = 0;
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virtual State state() const = 0;
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virtual uint position() const = 0;
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virtual uint length() const { return 0; }
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// Helpers
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virtual bool Load(const QUrl &url, TrackChangeType change);
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bool Play(const QUrl &u, TrackChangeType c) { return Load(u, c) && Play(); }
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void SetVolume( uint value );
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// Simple accessors
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inline uint volume() const { return volume_; }
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virtual const Scope &scope() { return scope_; }
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bool is_crossfade_enabled() const { return crossfade_enabled_; }
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bool is_autocrossfade_enabled() const { return autocrossfade_enabled_; }
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static const char* kSettingsGroup;
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static const int kScopeSize = 1024;
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public slots:
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virtual void ReloadSettings();
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virtual void SetEqualizerEnabled(bool) {}
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virtual void SetEqualizerParameters(int preamp, const QList<int>& bandGains) {}
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signals:
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// Emitted when crossfading is enabled and the track is crossfade_duration_
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// away from finishing
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void TrackAboutToEnd();
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2010-04-12 01:24:03 +02:00
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void TrackEnded();
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void StatusText(const QString&);
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void Error(const QString&);
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void MetaData(const Engine::SimpleMetaBundle&);
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void StateChanged(Engine::State);
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protected:
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Base();
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virtual void SetVolumeSW( uint percent ) = 0;
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static uint MakeVolumeLogarithmic( uint volume );
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void EmitAboutToEnd();
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protected:
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uint volume_;
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QUrl url_;
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Scope scope_;
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bool fadeout_enabled_;
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int fadeout_duration_;
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bool crossfade_enabled_;
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bool autocrossfade_enabled_;
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private:
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bool about_to_end_emitted_;
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};
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2010-04-12 02:26:16 +02:00
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struct SimpleMetaBundle {
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QString title;
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QString artist;
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QString album;
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QString comment;
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QString genre;
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QString bitrate;
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QString samplerate;
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QString length;
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QString year;
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QString tracknr;
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};
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2010-04-12 01:24:03 +02:00
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} // namespace
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2009-12-24 20:16:07 +01:00
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#endif
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