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@ r15913:089431d6de35
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Location: cpp/openttd-patchpack/source/src/driver.h
r15913:089431d6de35
2.8 KiB
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(svn r20607) -Fix: retain information about all base sets that are found and not only the latest version. This to stop confusing people that use newer versions of the base sets than those available via BaNaNaS.
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/*
* This file is part of OpenTTD.
* OpenTTD 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, version 2.
* OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file driver.h Base for all drivers (video, sound, music, etc). */
#ifndef DRIVER_H
#define DRIVER_H
#include "core/enum_type.hpp"
#include "core/string_compare_type.hpp"
#include <map>
const char *GetDriverParam(const char * const *parm, const char *name);
bool GetDriverParamBool(const char * const *parm, const char *name);
int GetDriverParamInt(const char * const *parm, const char *name, int def);
class Driver {
public:
virtual const char *Start(const char * const *parm) = 0;
virtual void Stop() = 0;
virtual ~Driver() { }
/** The type of driver */
enum Type {
DT_BEGIN = 0, ///< Helper for iteration
DT_MUSIC = 0, ///< A music driver, needs to be before sound to properly shut down extmidi forked music players
DT_SOUND, ///< A sound driver
DT_VIDEO, ///< A video driver
DT_END, ///< Helper for iteration
};
virtual const char *GetName() const = 0;
};
DECLARE_POSTFIX_INCREMENT(Driver::Type)
class DriverFactoryBase {
private:
Driver::Type type;
const char *name;
int priority;
typedef std::map<const char *, DriverFactoryBase *, StringCompare> Drivers;
static Drivers &GetDrivers()
{
static Drivers &s_drivers = *new Drivers();
return s_drivers;
}
static Driver **GetActiveDriver(Driver::Type type)
{
static Driver *s_driver[3] = { NULL, NULL, NULL };
return &s_driver[type];
}
static const char *GetDriverTypeName(Driver::Type type)
{
static const char * const driver_type_name[] = { "music", "sound", "video" };
return driver_type_name[type];
}
protected:
void RegisterDriver(const char *name, Driver::Type type, int priority);
public:
DriverFactoryBase() :
name(NULL)
{}
virtual ~DriverFactoryBase();
/**
* Shuts down all active drivers
*/
static void ShutdownDrivers()
{
for (Driver::Type dt = Driver::DT_BEGIN; dt < Driver::DT_END; dt++) {
Driver *driver = *GetActiveDriver(dt);
if (driver != NULL) driver->Stop();
}
}
static Driver *SelectDriver(const char *name, Driver::Type type);
static char *GetDriversInfo(char *p, const char *last);
/**
* Get a nice description of the driver-class.
*/
virtual const char *GetDescription() = 0;
/**
* Create an instance of this driver-class.
*/
virtual Driver *CreateInstance() = 0;
};
#endif /* DRIVER_H */
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