/** 
 * @file llmediaimplgstreamer.h
 * @author Tofu Linden
 * @brief implementation that supports media playback via GStreamer.
 *
 * $LicenseInfo:firstyear=2007&license=viewergpl$
 * 
 * Copyright (c) 2007-2008, Linden Research, Inc.
 * 
 * Second Life Viewer Source Code
 * The source code in this file ("Source Code") is provided by Linden Lab
 * to you under the terms of the GNU General Public License, version 2.0
 * ("GPL"), unless you have obtained a separate licensing agreement
 * ("Other License"), formally executed by you and Linden Lab.  Terms of
 * the GPL can be found in doc/GPL-license.txt in this distribution, or
 * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
 * 
 * There are special exceptions to the terms and conditions of the GPL as
 * it is applied to this Source Code. View the full text of the exception
 * in the file doc/FLOSS-exception.txt in this software distribution, or
 * online at http://secondlifegrid.net/programs/open_source/licensing/flossexception
 * 
 * By copying, modifying or distributing this software, you acknowledge
 * that you have read and understood your obligations described above,
 * and agree to abide by those obligations.
 * 
 * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
 * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
 * COMPLETENESS OR PERFORMANCE.
 * $/LicenseInfo$
 */

// header guard
#ifndef llmediaimplgstreamer_h
#define llmediaimplgstreamer_h

#include "llmediaimplcommon.h"
#include "llmediaimplfactory.h"

#if LL_GSTREAMER_ENABLED

extern "C" {
#include <stdio.h>
#include <gst/gst.h>

#include "apr_pools.h"
#include "apr_dso.h"
}

#include "llmediaimplgstreamervidplug.h"
#ifdef LL_GST_SOUNDSINK
#include "llmediaimplgstreamersndplug.h"
#endif // LL_GST_SOUNDSINK

class LLMediaManagerData;
class LLMediaImplMaker;

///////////////////////////////////////////////////////////////////////////
class LLMediaImplGStreamer:
	public LLMediaImplCommon
{
	public:
		LLMediaImplGStreamer ();
		virtual ~LLMediaImplGStreamer ();

		////////////////////////////////////////////////////////
		// implementation of the media public interface

		static bool startup( LLMediaManagerData* init_data );
		static bool closedown();

		/* virtual */ std::string getVersion();
		/* virtual */ bool navigateTo( const std::string url );
		/* virtual */ bool updateMedia();
		/* virtual */ unsigned char* getMediaData();
		/* virtual */ int getTextureFormatPrimary() const;
		/* virtual */ int getTextureFormatType() const;
		/* virtual */ int getTextureFormatInternal() const;
		/* virtual */ bool seek( double time );
	        /* virtual */ bool setVolume( float volume );

	        LLMediaEmitter< LLMediaObserver > getEventEmitter() const {return mEventEmitter;};

	private:
        	// misc
	        bool unload();
	        bool pause();
	        bool stop();
	        bool play();
	        static gboolean bus_callback (GstBus     *bus,
					      GstMessage *message,
					      gpointer    data);
		unsigned char* mediaData;
        	int mMediaRowbytes;

	        int mTextureFormatPrimary;
	        int mTextureFormatType;

	        // GStreamer-specific
        	GMainLoop *mPump; // event pump for this media
	        GstElement *mPlaybin;
		GstSLVideo *mVideoSink;
#ifdef LL_GST_SOUNDSINK
		GstSLSound *mAudioSink;
#endif // LL_GST_SOUNDSINK
};

class LLMediaImplGStreamerMaker : public LLMediaImplMaker
{
public: 
	LLMediaImplGStreamerMaker();
	LLMediaImplGStreamer* create()
	{
		return new LLMediaImplGStreamer();
	}
};

/////////////////////////////////////////////////////////////////////////
// Debug/Info/Warning macros.
#define STDERRMSG(...) do{\
    fprintf(stderr, "%s:%d: ", __FUNCTION__, __LINE__);\
    fprintf(stderr, __VA_ARGS__);\
    fputc('\n',stderr);\
  }while(0)
#define NULLMSG(...) do{}while(0)

#define DEBUGMSG NULLMSG
#define INFOMSG  STDERRMSG
#define WARNMSG  STDERRMSG
/////////////////////////////////////////////////////////////////////////

#endif // LL_GSTREAMER_ENABLED

#endif // llmediaimplgstreamer_h
