source: trunk/src/dsound/initdsound.cpp@ 10080

Last change on this file since 10080 was 9232, checked in by sandervl, 23 years ago

YD: Load MMPM2 (MDM.DLL) on demand
File size: 8.0 KB
Line 
1/* $Id: initdsound.cpp,v 1.1 2002-09-14 08:31:25 sandervl Exp $
2 *
3 * DLL entry point
4 *
5 * Copyright 1998 Sander van Leeuwen
6 * Copyright 1998 Peter Fitzsimmons
7 *
8 *
9 * Project Odin Software License can be found in LICENSE.TXT
10 *
11 */
12
13/*-------------------------------------------------------------*/
14/* INITERM.C -- Source for a custom dynamic link library */
15/* initialization and termination (_DLL_InitTerm) */
16/* function. */
17/* */
18/* When called to perform initialization, this sample function */
19/* gets storage for an array of integers, and initializes its */
20/* elements with random integers. At termination time, it */
21/* frees the array. Substitute your own special processing. */
22/*-------------------------------------------------------------*/
23
24
25/* Include files */
26#define INCL_DOSMODULEMGR
27#define INCL_DOSPROCESS
28#define INCL_DOSERRORS
29#define INCL_OS2MM
30#include <os2wrap.h> //Odin32 OS/2 api wrappers
31#include <os2mewrap.h> //Odin32 OS/2 MMPM/2 api wrappers
32#include <stdlib.h>
33#include <stdio.h>
34#include <string.h>
35#include <odin.h>
36#include <win32type.h>
37#include <win32api.h>
38#include <winconst.h>
39#include <odinlx.h>
40#include <misc.h> /*PLF Wed 98-03-18 23:18:15*/
41#include <initdll.h>
42#include <custombuild.h>
43#include "initdsound.h"
44
45extern "C" {
46 //Win32 resource table (produced by wrc)
47 extern DWORD _Resource_PEResTab;
48}
49
50static HMODULE dllHandle = 0;
51static HMODULE MMPMLibraryHandle = 0;
52
53BOOL fdsMMPMAvailable = TRUE;
54
55DWORD (APIENTRY *pfnDSmciSendCommand)(WORD wDeviceID,
56 WORD wMessage,
57 DWORD dwParam1,
58 PVOID dwParam2,
59 WORD wUserParm) = NULL;
60DWORD (APIENTRY *pfnDSmciGetErrorString)(DWORD dwError,
61 LPSTR lpstrBuffer,
62 WORD wLength) = NULL;
63
64
65//******************************************************************************
66//******************************************************************************
67BOOL WINAPI LibMainDSound(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID fImpLoad)
68{
69 char szError[CCHMAXPATH];
70 HKEY hKey;
71
72 switch (fdwReason)
73 {
74 case DLL_PROCESS_ATTACH:
75
76 if(fdsMMPMAvailable == TRUE)
77 {//if audio access wasn't disabled already, check if mmpm2 is installed
78 // try to load the MDM library, not MMPM directly!!!
79 if (DosLoadModule(szError, sizeof(szError),
80 "MDM.DLL", &MMPMLibraryHandle) != NO_ERROR)
81 {
82 // this system has no MMPM :-(
83 fdsMMPMAvailable = FALSE;
84 }
85 else
86 {
87 /* detect if MMPM is available */
88 if (DosQueryProcAddr(MMPMLibraryHandle,
89 1, /* ORD_MCISENDCOMMAND */
90 NULL,
91 (PFN*)&pfnDSmciSendCommand) != NO_ERROR)
92 {
93 fdsMMPMAvailable = FALSE;
94 }
95 else
96 {
97 fdsMMPMAvailable = TRUE;
98 }
99
100 /* see if we can get the address for the mciGetErrorString function */
101 if (fdsMMPMAvailable == TRUE)
102 {
103 if (DosQueryProcAddr(MMPMLibraryHandle,
104 3, /* ORD_MCIGETERRORSTRING */
105 NULL,
106 (PFN*)&pfnDSmciGetErrorString) != NO_ERROR)
107 pfnDSmciGetErrorString = NULL;
108 }
109 dprintf(("MMPM/2 is available; hmod %x", MMPMLibraryHandle));
110 dprintf(("mciSendCommand %x", pfnDSmciSendCommand));
111 dprintf(("mciGetErrorString %x", pfnDSmciGetErrorString));
112 }
113 }
114
115 if(fdsMMPMAvailable && RegOpenKeyA(HKEY_LOCAL_MACHINE, CUSTOM_BUILD_OPTIONS_KEY, &hKey) == 0)
116 {
117 DWORD dwSize, dwType;
118 DWORD dwFlag;
119
120 dwSize = sizeof(dwFlag);
121 LONG rc = RegQueryValueExA(hKey, DISABLE_AUDIO_KEY,
122 NULL, &dwType,
123 (LPBYTE)&dwFlag,
124 &dwSize);
125
126 if(rc == 0 && dwType == REG_DWORD) {
127 if(dwFlag) {
128 fdsMMPMAvailable = FALSE;
129 pfnDSmciGetErrorString = NULL;
130 pfnDSmciSendCommand = NULL;
131 }
132 }
133 RegCloseKey(hKey);
134 }
135 return TRUE;
136
137 case DLL_THREAD_ATTACH:
138 case DLL_THREAD_DETACH:
139 return TRUE;
140
141 case DLL_PROCESS_DETACH:
142 if(MMPMLibraryHandle) DosFreeModule(MMPMLibraryHandle);
143 return TRUE;
144 }
145 return FALSE;
146}
147/****************************************************************************/
148/* _DLL_InitTerm is the function that gets called by the operating system */
149/* loader when it loads and frees this DLL for each process that accesses */
150/* this DLL. However, it only gets called the first time the DLL is loaded */
151/* and the last time it is freed for a particular process. The system */
152/* linkage convention MUST be used because the operating system loader is */
153/* calling this function. */
154/****************************************************************************/
155ULONG APIENTRY inittermDSound(ULONG hModule, ULONG ulFlag)
156{
157
158 /*-------------------------------------------------------------------------*/
159 /* If ulFlag is zero then the DLL is being loaded so initialization should */
160 /* be performed. If ulFlag is 1 then the DLL is being freed so */
161 /* termination should be performed. */
162 /*-------------------------------------------------------------------------*/
163
164 switch (ulFlag) {
165 case 0 :
166 {
167 dllHandle = RegisterLxDll(hModule, LibMainDSound, (PVOID)&_Resource_PEResTab);
168 if(dllHandle == 0)
169 return 0UL;
170
171 dprintf(("dsound init %s %s (%x)", __DATE__, __TIME__, inittermDSound));
172 break;
173 }
174
175 case 1 :
176 if(dllHandle) {
177 UnregisterLxDll(dllHandle);
178 }
179 break;
180 default :
181 return 0UL;
182 }
183
184 /***********************************************************/
185 /* A non-zero value must be returned to indicate success. */
186 /***********************************************************/
187 return 1UL;
188}
189//******************************************************************************
190//******************************************************************************
191
192DWORD APIENTRY dsmciSendCommand(WORD wDeviceID,
193 WORD wMessage,
194 DWORD dwParam1,
195 PVOID dwParam2,
196 WORD wUserParm)
197{
198 if(pfnDSmciSendCommand == NULL) {
199 DebugInt3();
200 return MCIERR_CANNOT_LOAD_DRIVER;
201 }
202 USHORT sel = RestoreOS2FS();
203 DWORD ret = pfnDSmciSendCommand(wDeviceID, wMessage, dwParam1, dwParam2, wUserParm);
204 SetFS(sel);
205 return ret;
206}
207//******************************************************************************
208//******************************************************************************
209DWORD APIENTRY dsmciGetErrorString(DWORD dwError,
210 LPSTR lpstrBuffer,
211 WORD wLength)
212{
213 if(pfnDSmciGetErrorString == NULL) {
214 DebugInt3();
215 return MCIERR_CANNOT_LOAD_DRIVER;
216 }
217 USHORT sel = RestoreOS2FS();
218 DWORD ret = pfnDSmciGetErrorString(dwError, lpstrBuffer, wLength);
219 SetFS(sel);
220 return ret;
221}
222//******************************************************************************
223//******************************************************************************
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