#ifndef GSTREAMER_H
#define GSTREAMER_H

/*
 * Copyright (C) 2007-2009 Sergio Pistone <sergio_pistone@yahoo.com.ar>
 * Copyright (C) 2010-2017 Mladen Milinkovic <max@smoothware.net>
 *
 * This program 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 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#include "videoplayer/waveformat.h"

#include <QString>
#include <QStringList>

#include <gst/gst.h>

namespace SubtitleComposer {
class GStreamer
{
	friend class GStreamerPlayerBackend;
	friend class StreamProcessor;

private:
	static bool init();
	static void deinit();

	static GstElement * createElement(const QString &types, const char *name);
	static GstElement * createElement(const QStringList &types, const char *name);

	static GstStateChangeReturn setElementState(GstElement *element, int state, unsigned timeout = 0);

	static WaveFormat formatFromAudioCaps(GstCaps *caps);
	static GstCaps * audioCapsFromFormat(const WaveFormat &format, bool addSampleRate = true);
	static GstCaps * textCapsFromEncoding(const char *encoding);

	static GstPadLinkReturn link(GstBin *bin, const char *srcElement, const char *dstElement, GstCaps *filter = 0);
	static GstPadLinkReturn link(GstBin *bin, const char *srcElement, const char *srcPad, const char *dstElement, const char *dstPad, GstCaps *filter = 0);

	static void freePipeline(GstPipeline **pipeline, GstBus **bus);

	static void inspectTags(GstTagList *tags, const QString &prefix = QString());
	static void inspectPad(GstPad *pad, const QString &prefix = QString());
	static void inspectCaps(GstCaps *caps, const QString &prefix = QString());
	static void inspectMessage(GstMessage *message);
	static void inspectObject(GObject *object);

private:
	static int s_inited;
};
}
#endif
