148 lines
4.2 KiB
C++
148 lines
4.2 KiB
C++
/*
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* Strawberry Music Player
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* This file was part of Clementine.
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* Copyright 2010, David Sansome <me@davidsansome.com>
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* Copyright 2018-2019, Jonas Kvinge <jonas@jkvinge.net>
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*
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* Strawberry 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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*
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* Strawberry 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 Strawberry. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef TRANSCODER_H
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#define TRANSCODER_H
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#include "config.h"
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#include <memory>
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#include <glib.h>
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#include <glib-object.h>
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#include <gst/gst.h>
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#include <QObject>
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#include <QList>
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#include <QMap>
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#include <QMetaType>
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#include <QSet>
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#include <QString>
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#include <QEvent>
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#include "core/song.h"
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struct TranscoderPreset {
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explicit TranscoderPreset() : type_(Song::FileType_Unknown) {}
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TranscoderPreset(Song::FileType type, const QString &name, const QString &extension, const QString &codec_mimetype, 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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explicit Transcoder(QObject *parent = nullptr, const QString &settings_postfix = "");
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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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QString GetFile(const QString &input, const TranscoderPreset &preset, const QString output = QString());
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void AddJob(const QString &input, const TranscoderPreset &preset, const QString &output);
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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 &input, const QString &output, 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 job's thread.
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struct JobState {
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explicit JobState(const Job &job, Transcoder *parent)
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: job_(job),
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parent_(parent),
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pipeline_(nullptr),
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convert_element_(nullptr) {}
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~JobState();
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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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GstElement *pipeline_;
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GstElement *convert_element_;
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};
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// Event passed from a GStreamer callback to the Transcoder when a job finishes.
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struct JobFinishedEvent : public QEvent {
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explicit 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 = nullptr, const QString &name = QString());
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GstElement *CreateElementForMimeType(const QString &element_type, const QString &mime_type, GstElement *bin = nullptr);
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void SetElementProperties(const QString &name, GObject *object);
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static void NewPadCallback(GstElement*, GstPad *pad, 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<std::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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QString settings_postfix_;
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};
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#endif // TRANSCODER_H
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