strawberry-audio-player-win.../src/moodbar/moodbarpipeline.h

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/* This file was part of Clementine.
Copyright 2012, David Sansome <me@davidsansome.com>
Strawberry is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Strawberry is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Strawberry. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MOODBARPIPELINE_H
#define MOODBARPIPELINE_H
#include <QObject>
#include <QByteArray>
#include <QString>
#include <QUrl>
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#include <glib.h>
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#include <gst/gst.h>
#include <gst/app/gstappsink.h>
#include <memory>
class MoodbarBuilder;
// Creates moodbar data for a single local music file.
class MoodbarPipeline : public QObject {
Q_OBJECT
public:
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explicit MoodbarPipeline(const QUrl &local_filename, QObject *parent = nullptr);
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~MoodbarPipeline() override;
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bool success() const { return success_; }
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const QByteArray &data() const { return data_; }
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public slots:
void Start();
signals:
void Finished(bool success);
private:
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GstElement *CreateElement(const QString &factory_name);
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void ReportError(GstMessage *msg);
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void Stop(const bool success);
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void Cleanup();
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static void NewPadCallback(GstElement*, GstPad *pad, gpointer data);
static GstFlowReturn NewBufferCallback(GstAppSink *app_sink, gpointer self);
static gboolean BusCallback(GstBus*, GstMessage *msg, gpointer data);
static GstBusSyncReply BusCallbackSync(GstBus*, GstMessage *msg, gpointer data);
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private:
static const int kBands;
QUrl local_filename_;
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GstElement *pipeline_;
GstElement *convert_element_;
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std::unique_ptr<MoodbarBuilder> builder_;
bool success_;
bool running_;
QByteArray data_;
};
#endif // MOODBARPIPELINE_H