105 lines
2.6 KiB
C++
105 lines
2.6 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 TRANSCODER_H
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#define TRANSCODER_H
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#include <gst/gst.h>
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#include <QObject>
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#include <QStringList>
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#include <QFutureWatcher>
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#include <QMetaType>
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#include <boost/scoped_ptr.hpp>
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class QEventLoop;
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class Transcoder;
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class TranscoderFormat {
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friend class Transcoder;
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public:
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virtual ~TranscoderFormat() {}
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virtual QString name() const = 0;
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virtual QString file_extension() const = 0;
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protected:
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virtual GstElement* CreateEncodeBin() const = 0;
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GstElement* CreateElement(const QString& factory_name, GstElement* bin = NULL,
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const QString& name = QString()) const;
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GstElement* CreateBin(const QStringList& elements) const;
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};
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Q_DECLARE_METATYPE(const TranscoderFormat*);
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class Transcoder : public QObject {
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Q_OBJECT
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public:
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Transcoder(QObject* parent = 0);
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~Transcoder();
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QList<const TranscoderFormat*> formats() const;
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void AddJob(const QString& input, const TranscoderFormat* output_format,
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const QString& output = QString());
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public slots:
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void Start();
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signals:
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void JobComplete(const QString& filename, bool success);
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void AllJobsComplete();
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private:
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// The description of a file to transcode - lives in the main thread.
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struct Job {
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QString input;
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QString output;
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const TranscoderFormat* output_format;
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};
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// State held by a job and shared across gstreamer callbacks - lives in the
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// job's thread.
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struct JobState {
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GstElement* convert_element;
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boost::scoped_ptr<QEventLoop> event_loop;
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bool success;
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};
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void RunJob(const Job& job);
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bool Transcode(const Job& job) const;
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static void NewPadCallback(GstElement*, GstPad* pad, gboolean, gpointer data);
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static gboolean BusCallback(GstBus*, GstMessage* msg, gpointer data);
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static GstBusSyncReply BusCallbackSync(GstBus*, GstMessage* msg, gpointer data);
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private slots:
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void JobsFinished();
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private:
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QList<TranscoderFormat*> formats_;
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QList<Job> jobs_;
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QFutureWatcher<void>* future_watcher_;
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};
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#endif // TRANSCODER_H
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