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flightgear/src/Viewer/viewmgr.hxx
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2022-10-20 20:29:11 +08:00

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// viewmgr.hxx -- class for managing all the views in the flightgear world.
//
// Written by Curtis Olson, started October 2000.
//
// Copyright (C) 2000 Curtis L. Olson - http://www.flightgear.org/~curt
//
// 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.
//
// $Id$
#ifndef _VIEWMGR_HXX
#define _VIEWMGR_HXX
#include <vector>
#include <simgear/compiler.h>
#include <simgear/structure/subsystem_mgr.hxx>
#include <simgear/props/props.hxx>
#include <simgear/props/tiedpropertylist.hxx>
#include <simgear/math/SGMath.hxx>
#include <simgear/screen/video-encoder.hxx>
// forward decls
namespace flightgear
{
class View;
typedef SGSharedPtr<flightgear::View> ViewPtr;
}
// Define a structure containing view information
class FGViewMgr : public SGSubsystem
{
public:
// Constructor
FGViewMgr( void );
// Destructor
~FGViewMgr( void );
// Subsystem API.
void bind() override;
void init() override;
void postinit() override;
void reinit() override;
void shutdown() override;
void unbind() override;
void update(double dt) override;
// Subsystem identification.
static const char* staticSubsystemClassId() { return "view-manager"; }
// getters
inline int size() const { return views.size(); }
int getCurrentViewIndex() const;
flightgear::View* get_current_view();
const flightgear::View* get_current_view() const;
flightgear::View* get_view( int i );
const flightgear::View* get_view( int i ) const;
flightgear::View* next_view();
flightgear::View* prev_view();
// Support for extra view windows. This only works if --compositer-viewer=1 was specified.
//
// Calls SviewPush().
void view_push();
// These all end up calling SviewCreate().
void clone_current_view(const SGPropertyNode* config);
void clone_last_pair(const SGPropertyNode* config);
void clone_last_pair_double(const SGPropertyNode* config);
void view_new(const SGPropertyNode* config);
// setters
void clear();
void add_view( flightgear::View * v );
// Start video encoding of main window.
//
// name
// If "", we generate a name containing aircraft name, date and
// time and with suffix /sim/video/container, and we also create a
// softlink with the same name excluding date and time. Both names are
// converted into paths by prepending with /sim/video/directory.
//
// Otherwise we prepend with /sim/video/directory, and do not create
// a softlink. In this case, <name> should end with a name that is a
// recognised video container, such as '.mp4'.
//
// List of supported containers can be found with 'ffmpeg -formats'.
// codec_name
// Name of codec or "" to use /sim/video/codec. Passed to
// avcodec_find_encoder_by_name(). List of supported codecs can be
// found with 'ffmpeg -codecs'.
// quality
// Encoding quality in range 0..1 or -1 to use /sim/video/quality.
// speed:
// Encoding speed in range 0..1 or -1 to use /sim/video/speed.
// bitrate
// Target bitratae in bits/sec or -1 to use /sim/video/bitrate.
//
// We show popup warning if values are out of range - quality and speed
// must be -1 or 0-1, bitrate must be >= 0.
//
// Returns false if we fail to start video encoding.
//
bool video_start(
const std::string& name="",
const std::string& codec="",
double quality=-1,
double speed=-1,
int bitrate=0
);
// Stop video encoding of main window.
//
void video_stop();
private:
simgear::TiedPropertyList _tiedProperties;
void setCurrentViewIndex(int newview);
bool _inited = false;
std::vector<SGPropertyNode_ptr> config_list;
SGPropertyNode_ptr _viewNumberProp;
typedef std::vector<flightgear::ViewPtr> viewer_list;
viewer_list views;
int _current = 0;
std::unique_ptr<simgear::VideoEncoder> _video_encoder;
};
#endif // _VIEWMGR_HXX