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vmrcli/src/interface.c

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/**
* @file interface.c
* @author Vincent Burel, Onyx and Iris (code@onyxandiris.online)
* @brief Functions for initializing the iVMR interface.
* Defines a single public function that returns a pointer to the interface.
* @version 0.13.0
* @date 2024-07-06
*
* @copyright Vincent Burel(c)2015-2021 All Rights Reserved
* https://github.com/vburel2018/Voicemeeter-SDK/blob/main/LICENSE
*
* Copyright (c) 2024 Onyx and Iris
* https://github.com/onyx-and-iris/vmrcli/blob/main/LICENSE
*/
#include <windows.h>
#include "interface.h"
#include "util.h"
#include "log.h"
#define PRAGMA_IgnoreWCastIncompatibleFuncTypes \
_Pragma("GCC diagnostic push") \
_Pragma("GCC diagnostic ignored \"-Wcast-function-type\"")
#define PRAGMA_Pop \
_Pragma("GCC diagnostic pop")
static long initialize_dll_interfaces(PT_VMR vmr);
static bool registry_get_voicemeeter_folder(char *dll_fullpath);
/**
* @brief Create an interface object
*
* @return PT_VMR Pointer to the iVMR interface
* May return NULL if the interface fails to initialize
*/
PT_VMR create_interface()
{
PT_VMR vmr = malloc(sizeof(T_VBVMR_INTERFACE));
if (vmr == NULL)
{
log_error("malloc failed to allocate memory");
return NULL;
}
LONG rep = initialize_dll_interfaces(vmr);
if (rep < 0)
{
if (rep == -100)
{
log_fatal("Voicemeeter is not installed");
}
else
{
log_fatal("Error loading Voicemeeter dll with code %d", rep);
}
free(vmr);
vmr = NULL;
}
return vmr;
}
/*******************************************************************************/
/** GET DLL INTERFACE **/
/*******************************************************************************/
#define DLL_FULLPATH_SZ 1024
#define DLL64_NAME "\\VoicemeeterRemote64.dll"
#define DLL32_NAME "\\VoicemeeterRemote.dll"
static long initialize_dll_interfaces(PT_VMR vmr)
{
HMODULE G_H_Module = NULL;
char dll_fullpath[DLL_FULLPATH_SZ];
memset(vmr, 0, sizeof(T_VBVMR_INTERFACE));
// get Voicemeeter installation directory
if (!registry_get_voicemeeter_folder(dll_fullpath))
{
// Voicemeeter not installed
return -100;
}
// use right dll according to O/S type
if (IS_64_BIT)
strncat(dll_fullpath, DLL64_NAME, DLL_FULLPATH_SZ - strlen(DLL64_NAME) - 1);
else
strncat(dll_fullpath, DLL32_NAME, DLL_FULLPATH_SZ - strlen(DLL32_NAME) - 1);
// Load Dll
G_H_Module = LoadLibrary(dll_fullpath);
if (G_H_Module == NULL)
return -101;
PRAGMA_IgnoreWCastIncompatibleFuncTypes;
// Get function pointers
vmr->VBVMR_Login = (T_VBVMR_Login)GetProcAddress(G_H_Module, "VBVMR_Login");
vmr->VBVMR_Logout = (T_VBVMR_Logout)GetProcAddress(G_H_Module, "VBVMR_Logout");
vmr->VBVMR_RunVoicemeeter = (T_VBVMR_RunVoicemeeter)GetProcAddress(G_H_Module, "VBVMR_RunVoicemeeter");
vmr->VBVMR_GetVoicemeeterType = (T_VBVMR_GetVoicemeeterType)GetProcAddress(G_H_Module, "VBVMR_GetVoicemeeterType");
vmr->VBVMR_GetVoicemeeterVersion = (T_VBVMR_GetVoicemeeterVersion)GetProcAddress(G_H_Module, "VBVMR_GetVoicemeeterVersion");
vmr->VBVMR_IsParametersDirty = (T_VBVMR_IsParametersDirty)GetProcAddress(G_H_Module, "VBVMR_IsParametersDirty");
vmr->VBVMR_GetParameterFloat = (T_VBVMR_GetParameterFloat)GetProcAddress(G_H_Module, "VBVMR_GetParameterFloat");
vmr->VBVMR_GetParameterStringA = (T_VBVMR_GetParameterStringA)GetProcAddress(G_H_Module, "VBVMR_GetParameterStringA");
vmr->VBVMR_GetParameterStringW = (T_VBVMR_GetParameterStringW)GetProcAddress(G_H_Module, "VBVMR_GetParameterStringW");
vmr->VBVMR_GetLevel = (T_VBVMR_GetLevel)GetProcAddress(G_H_Module, "VBVMR_GetLevel");
vmr->VBVMR_GetMidiMessage = (T_VBVMR_GetMidiMessage)GetProcAddress(G_H_Module, "VBVMR_GetMidiMessage");
vmr->VBVMR_SetParameterFloat = (T_VBVMR_SetParameterFloat)GetProcAddress(G_H_Module, "VBVMR_SetParameterFloat");
vmr->VBVMR_SetParameters = (T_VBVMR_SetParameters)GetProcAddress(G_H_Module, "VBVMR_SetParameters");
vmr->VBVMR_SetParametersW = (T_VBVMR_SetParametersW)GetProcAddress(G_H_Module, "VBVMR_SetParametersW");
vmr->VBVMR_SetParameterStringA = (T_VBVMR_SetParameterStringA)GetProcAddress(G_H_Module, "VBVMR_SetParameterStringA");
vmr->VBVMR_SetParameterStringW = (T_VBVMR_SetParameterStringW)GetProcAddress(G_H_Module, "VBVMR_SetParameterStringW");
vmr->VBVMR_Output_GetDeviceNumber = (T_VBVMR_Output_GetDeviceNumber)GetProcAddress(G_H_Module, "VBVMR_Output_GetDeviceNumber");
vmr->VBVMR_Output_GetDeviceDescA = (T_VBVMR_Output_GetDeviceDescA)GetProcAddress(G_H_Module, "VBVMR_Output_GetDeviceDescA");
vmr->VBVMR_Output_GetDeviceDescW = (T_VBVMR_Output_GetDeviceDescW)GetProcAddress(G_H_Module, "VBVMR_Output_GetDeviceDescW");
vmr->VBVMR_Input_GetDeviceNumber = (T_VBVMR_Input_GetDeviceNumber)GetProcAddress(G_H_Module, "VBVMR_Input_GetDeviceNumber");
vmr->VBVMR_Input_GetDeviceDescA = (T_VBVMR_Input_GetDeviceDescA)GetProcAddress(G_H_Module, "VBVMR_Input_GetDeviceDescA");
vmr->VBVMR_Input_GetDeviceDescW = (T_VBVMR_Input_GetDeviceDescW)GetProcAddress(G_H_Module, "VBVMR_Input_GetDeviceDescW");
vmr->VBVMR_MacroButton_IsDirty = (T_VBVMR_MacroButton_IsDirty)GetProcAddress(G_H_Module, "VBVMR_MacroButton_IsDirty");
vmr->VBVMR_MacroButton_GetStatus = (T_VBVMR_MacroButton_GetStatus)GetProcAddress(G_H_Module, "VBVMR_MacroButton_GetStatus");
vmr->VBVMR_MacroButton_SetStatus = (T_VBVMR_MacroButton_SetStatus)GetProcAddress(G_H_Module, "VBVMR_MacroButton_SetStatus");
PRAGMA_Pop;
// check pointers are valid
if (vmr->VBVMR_Login == NULL)
return -1;
if (vmr->VBVMR_Logout == NULL)
return -2;
if (vmr->VBVMR_RunVoicemeeter == NULL)
return -3;
if (vmr->VBVMR_GetVoicemeeterType == NULL)
return -4;
if (vmr->VBVMR_GetVoicemeeterVersion == NULL)
return -5;
if (vmr->VBVMR_IsParametersDirty == NULL)
return -6;
if (vmr->VBVMR_GetParameterFloat == NULL)
return -7;
if (vmr->VBVMR_GetParameterStringA == NULL)
return -8;
if (vmr->VBVMR_GetParameterStringW == NULL)
return -9;
if (vmr->VBVMR_GetLevel == NULL)
return -10;
if (vmr->VBVMR_SetParameterFloat == NULL)
return -11;
if (vmr->VBVMR_SetParameters == NULL)
return -12;
if (vmr->VBVMR_SetParametersW == NULL)
return -13;
if (vmr->VBVMR_SetParameterStringA == NULL)
return -14;
if (vmr->VBVMR_SetParameterStringW == NULL)
return -15;
if (vmr->VBVMR_GetMidiMessage == NULL)
return -16;
if (vmr->VBVMR_Output_GetDeviceNumber == NULL)
return -30;
if (vmr->VBVMR_Output_GetDeviceDescA == NULL)
return -31;
if (vmr->VBVMR_Output_GetDeviceDescW == NULL)
return -32;
if (vmr->VBVMR_Input_GetDeviceNumber == NULL)
return -33;
if (vmr->VBVMR_Input_GetDeviceDescA == NULL)
return -34;
if (vmr->VBVMR_Input_GetDeviceDescW == NULL)
return -35;
if (vmr->VBVMR_MacroButton_IsDirty == NULL)
return -36;
if (vmr->VBVMR_MacroButton_GetStatus == NULL)
return -37;
if (vmr->VBVMR_MacroButton_SetStatus == NULL)
return -38;
return 0;
}
/*******************************************************************************/
/** GET VOICEMEETER DIRECTORY **/
/*******************************************************************************/
#define INSTALLER_DIR_KEY "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall"
#define INSTALLER_UNINST_KEY "VB:Voicemeeter {17359A74-1236-5467}"
#ifndef KEY_WOW64_32KEY
#define KEY_WOW64_32KEY 0x0200
#endif
#define UNINSTALL_KEY_SZ 256
#define UNINSTALL_PATH_SZ 1024
static bool registry_get_voicemeeter_folder(char *dll_fullpath)
{
// build Voicemeeter uninstallation key
char uninstall_key[UNINSTALL_KEY_SZ];
snprintf(uninstall_key, UNINSTALL_KEY_SZ, "%s\\%s", INSTALLER_DIR_KEY, INSTALLER_UNINST_KEY);
// open key
HKEY result;
LONG rep = RegOpenKeyEx(HKEY_LOCAL_MACHINE, uninstall_key, 0, KEY_READ, &result);
if (rep != ERROR_SUCCESS)
{
// if not present we consider running in 64bit mode and force to read 32bit registry
rep = RegOpenKeyEx(HKEY_LOCAL_MACHINE, uninstall_key, 0, KEY_READ | KEY_WOW64_32KEY, &result);
}
if (rep != ERROR_SUCCESS)
return false;
// read uninstall path from registry
DWORD pptype = REG_SZ;
DWORD len_uninstall_path = UNINSTALL_PATH_SZ;
char uninstall_path[UNINSTALL_PATH_SZ] = {0};
rep = RegQueryValueEx(result, "UninstallString", 0, &pptype, (unsigned char *)uninstall_path, &len_uninstall_path);
RegCloseKey(result);
if (pptype != REG_SZ)
return false;
if (rep != ERROR_SUCCESS)
return false;
// remove name to get the path only
remove_last_part_of_path(uninstall_path);
snprintf(dll_fullpath, DLL_FULLPATH_SZ, uninstall_path);
return true;
}
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