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// license:BSD-3-Clause
// copyright-holders:Couriersud
/***************************************************************************
osdmodule.h
OSD module manangement
*******************************************************************c********/
//#pragma once
#ifndef __OSDMODULE_H__
#define __OSDMODULE_H__
#include "osdcore.h"
#include "osdepend.h"
//============================================================
// TYPE DEFINITIONS
//============================================================
class osd_options;
class osd_module;
// ======================> osd_module
class osd_module
{
public:
osd_module(const char *type, const char *name)
: m_name(name), m_type(type)
{}
virtual ~osd_module() { }
const char * name() const { return m_name.c_str(); }
const char * type() const { return m_type.c_str(); }
virtual bool probe() { return true; }
virtual int init(const osd_options &options) = 0;
virtual void exit() { }
private:
std::string m_name;
std::string m_type;
};
// a module_type is simply a pointer to its alloc function
typedef osd_module *(*module_type)();
// this template function creates a stub which constructs a module
template<class _ModuleClass>
osd_module *module_creator()
{
void *p = osd_malloc(sizeof(_ModuleClass));
return new(p) _ModuleClass;
}
class osd_module_manager
{
public:
static const int MAX_MODULES = 32;
osd_module_manager();
~osd_module_manager();
void register_module(const module_type &mod_type);
bool type_has_name(const char *type, const char *name);
osd_module *get_module_generic(const char *type, const char *name);
template<class C>
C select_module(const char *type, const char *name = "")
{
return dynamic_cast<C>(select_module(type, name));
}
osd_module *select_module(const char *type, const char *name = "");
void get_module_names(const char *type, const int max, int *num, const char *names[]);
void init(const osd_options &options);
void exit();
private:
int get_module_index(const char *type, const char *name);
osd_module *m_modules[MAX_MODULES];
osd_module *m_selected[MAX_MODULES];
};
#define MODULE_DEFINITION(_id, _class) \
extern const module_type _id ; \
const module_type _id = &module_creator< _class >;
#define MODULE_NOT_SUPPORTED(_mod, _type, _name) \
class _mod : public osd_module { \
public: \
_mod () : osd_module(_type, _name) { } \
int init(const osd_options &options) { return -1; } \
bool probe() { return false; } \
};
#endif /* __OSDMODULE_H__ */
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