winamp/Src/Winamp/GEN.H

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2024-09-24 13:54:57 +01:00
#ifndef NULLSOFT_WINAMP_GEN_H
#define NULLSOFT_WINAMP_GEN_H
// General Purpose plugin interface
#include <windows.h>
typedef struct {
int version;
char* description;
int(__cdecl* init)();
void(__cdecl* config)();
void(__cdecl* quit)();
HWND hwndParent;
HINSTANCE hDllInstance;
} winampGeneralPurposePlugin;
// return values from the init(..) which determines if Winamp will continue loading
// and handling the plugin or if it will disregard the load attempt. If GEN_INIT_FAILURE
// is returned then the plugin will be listed as [NOT LOADED] on the plug-in prefs page.
#define GEN_INIT_SUCCESS 0
#define GEN_INIT_FAILURE 1
#define GPPHDR_VER 0x10
// added 5.64+
#define GPPHDR_VER_U 0x11
// specify GPPHDR_VER_U if you want to provide a unicode (wchar_t*) description and only work on 5.64+
// specify GPPHDR_VER to use the original (char*) description as before
// note: we are using the fact that sizeof(char*) == sizeof(wchar_t*) to be able to allow this
// so when using GPPHDR_VER_U you will need to cast description to (wchar_t*) to set
#ifdef __cplusplus
extern "C" {
#endif
typedef winampGeneralPurposePlugin* (__cdecl* winampGeneralPurposePluginGetter)();
#ifdef __cplusplus
}
#endif
// These are the return values to be used with the uninstall plugin export function:
// __declspec(dllexport) int __cdecl winampUninstallPlugin(HINSTANCE hDllInst, HWND hwndDlg, int param)
// which determines if Winamp can uninstall the plugin immediately or on winamp restart.
// If this is not exported then Winamp will assume an uninstall with reboot is the only way.
//
#define GEN_PLUGIN_UNINSTALL_NOW 0x1
#define GEN_PLUGIN_UNINSTALL_REBOOT 0x0
//
// Uninstall support was added from 5.0+ and uninstall now support from 5.5+ though note
// that it is down to you to ensure that if uninstall now is returned that it will not
// cause a crash i.e. don't use if you've been subclassing the main window.
//
// The HWND passed in the calling of winampUninstallPlugin(..) is the preference page HWND.
//
// The following is a psuedo example of using winampUninstallPlugin(..) which shows its usage:
//
//
// // use this as a control on saving settings as quit(..) will be called afterwards
// int no_uninstall = 1;
// __declspec(dllexport) int __cdecl winampUninstallPlugin(HINSTANCE hDllInst, HWND hwndDlg, int param){
// // prompt to remove our settings with default as no (just incase)
// if(MessageBox(hwndDlg,"Do you also want to remove the saved settings for this plugin?",
// plugin.description,MB_YESNO|MB_DEFBUTTON2) == IDYES)
// {
// // PLUGIN_NAME is the name of the section you save settings into
// // and this call will make the OS remove the setion passed
// WritePrivateProfileString(PLUGIN_NAME,0,0,ini_file);
// no_uninstall = 0;
// }
// // as we're doing too much in subclasses, etc we cannot allow for on-the-fly removal so need to do a normal reboot
// return GEN_PLUGIN_UNINSTALL_REBOOT;
// }
//
// For a general purpose plugin to be correctly detected by Winamp you need to ensure that
// the exported winampGetGeneralPurposePlugin(..) is exported as an undecorated function
// e.g.
// #ifdef __cplusplus
// extern "C" {
// #endif
// __declspec(dllexport) winampGeneralPurposePlugin * __cdecl winampGetGeneralPurposePlugin(){ return &plugin; }
// #ifdef __cplusplus
// }
// #endif
//
#endif