147 lines
4.1 KiB
C++
147 lines
4.1 KiB
C++
/* This file is part of Clementine.
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Copyright 2010, David Sansome <me@davidsansome.com>
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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 <QEvent>
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#include <QMetaType>
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#include <boost/shared_ptr.hpp>
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#include <boost/scoped_ptr.hpp>
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#include "core/song.h"
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struct TranscoderPreset {
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TranscoderPreset() : type_(Song::Type_Unknown) {}
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TranscoderPreset(Song::FileType type,
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const QString& name,
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const QString& extension,
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const QString& codec_mimetype,
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const QString& muxer_mimetype_ = QString());
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Song::FileType type_;
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QString name_;
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QString extension_;
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QString codec_mimetype_;
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QString muxer_mimetype_;
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};
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Q_DECLARE_METATYPE(TranscoderPreset);
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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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static TranscoderPreset PresetForFileType(Song::FileType type);
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static QList<TranscoderPreset> GetAllPresets();
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static Song::FileType PickBestFormat(QList<Song::FileType> supported);
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int max_threads() const { return max_threads_; }
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void set_max_threads(int count) { max_threads_ = count; }
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void AddJob(const QString& input, const TranscoderPreset& preset,
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const QString& output = QString());
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QMap<QString, float> GetProgress() const;
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int QueuedJobsCount() const { return queued_jobs_.count(); }
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public slots:
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void Start();
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void Cancel();
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signals:
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void JobComplete(const QString& filename, bool success);
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void LogLine(const QString& message);
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void AllJobsComplete();
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protected:
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bool event(QEvent* e);
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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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TranscoderPreset preset;
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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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JobState(const Job& job, Transcoder* parent)
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: job_(job), parent_(parent), convert_element_(NULL), bus_callback_id_(0) {}
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void PostFinished(bool success);
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void ReportError(GstMessage* msg);
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Job job_;
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Transcoder* parent_;
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boost::shared_ptr<GstElement> pipeline_;
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GstElement* convert_element_;
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int bus_callback_id_;
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};
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// Event passed from a GStreamer callback to the Transcoder when a job
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// finishes.
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struct JobFinishedEvent : public QEvent {
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JobFinishedEvent(JobState* state, bool success);
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static int sEventType;
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JobState* state_;
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bool success_;
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};
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enum StartJobStatus {
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StartedSuccessfully,
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FailedToStart,
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NoMoreJobs,
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AllThreadsBusy,
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};
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StartJobStatus MaybeStartNextJob();
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bool StartJob(const Job& job);
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GstElement* CreateElement(const QString& factory_name, GstElement* bin = NULL,
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const QString& name = QString());
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GstElement* CreateElementForMimeType(const QString& element_type,
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const QString& mime_type,
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GstElement* bin = NULL);
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void SetElementProperties(const QString& name, GObject* element);
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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:
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typedef QList<boost::shared_ptr<JobState> > JobStateList;
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int max_threads_;
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QList<Job> queued_jobs_;
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JobStateList current_jobs_;
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};
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#endif // TRANSCODER_H
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