166 lines
5.2 KiB
C++
166 lines
5.2 KiB
C++
/***************************************************************************
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* Copyright (C) 2003-2005 by Mark Kretschmann <markey@web.de> *
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* Copyright (C) 2005 by Jakub Stachowski <qbast@go2.pl> *
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* Portions Copyright (C) 2006 Paul Cifarelli <paul@cifarelli.net> *
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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 *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Steet, Fifth Floor, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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#ifndef AMAROK_GSTENGINE_H
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#define AMAROK_GSTENGINE_H
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#include "enginebase.h"
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#include <QString>
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#include <QTimerEvent>
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#include <QList>
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#include <QStringList>
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#include <QMutex>
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#include <gst/gst.h>
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#include <boost/shared_ptr.hpp>
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class QTimerEvent;
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class GstEnginePipeline;
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/**
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* @class GstEngine
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* @short GStreamer engine plugin
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* @author Mark Kretschmann <markey@web.de>
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*/
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class GstEngine : public Engine::Base {
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Q_OBJECT
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public:
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GstEngine();
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~GstEngine();
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struct PluginDetails {
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QString name;
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QString long_name;
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QString author;
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QString description;
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};
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typedef QList<PluginDetails> PluginDetailsList;
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static const char* kSettingsGroup;
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static const char* kAutoSink;
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bool init();
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bool canDecode(const QUrl& url);
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uint position() const;
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uint length() const;
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Engine::State state() const;
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const Engine::Scope& scope();
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void gstStatusText(const QString& str) { emit statusText( str ); }
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void gstMetaData(Engine::SimpleMetaBundle &bundle) { emit metaData( bundle ); }
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PluginDetailsList GetOutputsList() const { return GetPluginList( "Sink/Audio" ); }
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static bool DoesThisSinkSupportChangingTheOutputDeviceToAUserEditableString(const QString& name);
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static GstElement* CreateElement(
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const QString& factoryName, GstElement* bin = 0, const QString& name = 0);
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public slots:
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bool load(const QUrl&, bool stream);
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bool play(uint offset);
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void stop();
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void pause();
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void unpause();
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void seek(uint ms);
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/** Set whether equalizer is enabled */
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void setEqualizerEnabled(bool);
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/** Set equalizer preamp and gains, range -100..100. Gains are 10 values. */
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void setEqualizerParameters(int preamp, const QList<int>& bandGains);
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void ReloadSettings();
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protected:
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void setVolumeSW(uint percent);
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void timerEvent(QTimerEvent*);
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private slots:
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void EndOfStreamReached();
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void HandlePipelineError(const QString& message);
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void NewMetaData(const Engine::SimpleMetaBundle& bundle);
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void NewBuffer(GstBuffer* buf);
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void ClearScopeQ();
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private:
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// Callbacks
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static void CanDecodeNewPadCallback(GstElement*, GstPad*, gboolean, gpointer);
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static void CanDecodeLastCallback(GstElement*, gpointer);
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/** Get a list of available plugins from a specified Class */
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PluginDetailsList GetPluginList(const QString& classname) const;
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/** Construct the output pipeline */
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boost::shared_ptr<GstEnginePipeline> CreatePipeline(const QUrl& url);
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/** Beams the streaming buffer status to Amarok */
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void SendBufferStatus();
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/////////////////////////////////////////////////////////////////////////////////////
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// DATA MEMBERS
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/////////////////////////////////////////////////////////////////////////////////////
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// Interval of main timer, handles the volume fading
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static const int kTimerInterval = 40; //msec
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QString sink_;
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QString device_;
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boost::shared_ptr<GstEnginePipeline> current_pipeline_;
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//////////
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// scope
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//////////
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// delay queue for synchronizing samples to where the audio device is playing
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GQueue* delayq_;
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// the current set of samples for the scope, in case we don't have enough buffers yet
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// and end up with an incomplete buffer
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float current_scope_[SCOPESIZE];
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// the sample in m_currentScope we are working on
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int current_sample_;
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void UpdateScope();
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qint64 PruneScope();
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QMutex scope_mutex_;
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float fade_value_;
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bool equalizer_enabled_;
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int equalizer_preamp_;
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QList<int> equalizer_gains_;
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bool shutdown_;
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mutable bool can_decode_success_;
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mutable bool can_decode_last_;
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GstElement* can_decode_pipeline_;
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GstElement* can_decode_src_;
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GstElement* can_decode_bin_;
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};
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#endif /*AMAROK_GSTENGINE_H*/
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