131 lines
3.7 KiB
C++
131 lines
3.7 KiB
C++
/* 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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#ifndef GSTENGINEPIPELINE_H
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#define GSTENGINEPIPELINE_H
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#include <QObject>
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#include <QUrl>
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#include <QTimeLine>
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#include <gst/gst.h>
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#include "engine_fwd.h"
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class GstEngine;
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struct GstURIDecodeBin;
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class GstEnginePipeline : public QObject {
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Q_OBJECT
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public:
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GstEnginePipeline(GstEngine* engine);
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~GstEnginePipeline();
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// Call these setters before Init
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void set_output_device(const QString& sink, const QString& device);
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void set_forwards_buffers(bool v) { forwards_buffers_ = v; }
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// Creates the pipeline, returns false on error
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bool Init(const QUrl& url);
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// Control the music playback
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bool SetState(GstState state);
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bool Seek(qint64 nanosec);
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void SetEqualizerEnabled(bool enabled);
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void SetEqualizerParams(int preamp, const QList<int>& band_gains);
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void SetVolume(int percent);
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void StartFader(int duration_msec,
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QTimeLine::Direction direction = QTimeLine::Forward,
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QTimeLine::CurveShape shape = QTimeLine::LinearCurve);
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// If this is set then it will be loaded automatically when playback finishes
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// for gapless playback
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void SetNextUrl(const QUrl& url) { next_url_ = url; }
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// Get information about the music playback
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QUrl url() const { return url_; }
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bool is_valid() const { return valid_; }
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qint64 position() const;
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qint64 length() const;
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GstState state() const;
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public slots:
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void SetVolumeModifier(qreal mod);
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signals:
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void EndOfStreamReached(bool has_next_track);
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void MetadataFound(const Engine::SimpleMetaBundle& bundle);
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void BufferFound(GstBuffer* buf);
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void Error(const QString& message);
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void FaderFinished();
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private:
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// Static callbacks. The GstEnginePipeline instance is passed in the last
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// argument.
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static GstBusSyncReply BusCallbackSync(GstBus*, GstMessage*, gpointer);
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static gboolean BusCallback(GstBus*, GstMessage*, gpointer);
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static void NewPadCallback(GstElement*, GstPad*, gpointer);
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static bool HandoffCallback(GstPad*, GstBuffer*, gpointer);
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static void EventCallback(GstPad*, GstEvent*, gpointer);
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static void SourceDrainedCallback(GstURIDecodeBin*, gpointer);
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static bool StopUriDecodeBin(gpointer bin);
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void TagMessageReceived(GstMessage*);
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QString ParseTag(GstTagList* list, const char* tag) const;
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void ErrorMessageReceived(GstMessage*);
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void UpdateVolume();
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bool ReplaceDecodeBin(const QUrl& url);
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private:
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static const int kGstStateTimeoutNanosecs = 10000000;
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GstEngine* engine_;
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bool valid_;
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QString sink_;
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QString device_;
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bool forwards_buffers_;
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QUrl url_;
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QUrl next_url_;
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int volume_percent_;
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qreal volume_modifier_;
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QTimeLine* fader_;
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GstElement* pipeline_;
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// Bins
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// uridecodebin ! audiobin
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GstElement* uridecodebin_;
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GstElement* audiobin_;
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// Elements in the audiobin
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// audioconvert ! equalizer ! volume ! audioscale ! audioconvert ! audiosink
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GstElement* audioconvert_;
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GstElement* equalizer_;
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GstElement* volume_;
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GstElement* audioscale_;
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GstElement* audiosink_;
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uint bus_cb_id_;
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};
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#endif // GSTENGINEPIPELINE_H
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