Update guide.md

docs/guide.md

@@ -48,11 +48,20 @@ sudo ln -s /lib/i386-linux-gnu/libglut.so /lib/i386-linux-gnu/libglut.so.3
 
 ### Let's Go Jungle Rev A
 
-- The game must be run in export mode to have the stereo sound option.
+The game must be run in export mode to have the stereo sound option.
 
 ### Outrun 2 SP SDX
 
-- You need to set `SKIP_OUTRUN_CABINET_CHECK` to 1 in `lindbergh.conf` to play in DX, SDX or Standard cabinet types.
+You need to set `SKIP_OUTRUN_CABINET_CHECK` to 1 in `lindbergh.conf` to play in DX, SDX or Standard cabinet types.
+
+### Ghost Squad / 2Spicy
+
+You may have sound issues complaining that the system cannot open `/dev[/sound]/dsp` in which case do the following:
+
+```
+sudo apt install pipewire-audio-client-libraries:i386
+sudo cp /usr/share/doc/pipewire/examples/alsa.conf.d/99-pipewire-default.conf /etc/alsa/conf.d/
+```
 
 ## Configuration File : lindbergh.conf
 

src/lindbergh/config.c

@@ -1,3 +1,4 @@
+#include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -1483,7 +1484,7 @@ KeyMapping getDefaultKeymap()
     return defaultKeyMapping;
 }
 
-int initConfig()
+int initConfig(const char* configFilePath)
 {
     config.emulateRideboard = 0;
     config.emulateDriveboard = 0;
@@ -1551,11 +1552,18 @@ int initConfig()
 
     config.inputMode = 0; // Default to all inputs
 
-    configFile = fopen(CONFIG_PATH, "r");
+    char filePath[PATH_MAX];
+    strncpy(filePath, CONFIG_PATH, PATH_MAX);
+    if (configFilePath != NULL && configFilePath[0] != '\0')
+    {
+        strncpy(filePath, configFilePath, PATH_MAX);
+    }
+
+    configFile = fopen(filePath, "r");
 
     if (configFile == NULL)
     {
-        log_warn("Cannot open %s, using default values.\n", CONFIG_PATH);
+        log_warn("Cannot open %s, using default values.\n", filePath);
         return 1;
     }
 

src/lindbergh/config.h

@@ -280,7 +280,7 @@ typedef struct
 } EmulatorConfig;
 
 KeyMapping getDefaultKeymap();
-int initConfig();
+int initConfig(const char* configFilePath);
 EmulatorConfig *getConfig();
 char *getGameName();
 char *getDVPName();

src/lindbergh/hook.c

@@ -185,7 +185,9 @@ void __attribute__((constructor)) hook_init()
     act.sa_flags = SA_SIGINFO;
     sigaction(SIGSEGV, &act, NULL);
 
-    initConfig();
+    char *(*_getenv)(const char *name) = dlsym(RTLD_NEXT, "getenv");
+    char* envPath = _getenv("LINDBERGH_CONFIG_PATH");
+    initConfig(envPath);
 
     if (getConfig()->fpsLimiter == 1)
     {
@@ -303,6 +305,15 @@ int open(const char *pathname, int flags, ...)
 
     int (*_open)(const char *pathname, int flags, ...) = dlsym(RTLD_NEXT, "open");
 
+    // Attempt to open /dev/dsp and /dev/dsp1
+    if (strcmp(pathname, "/dev/dsp") == 0) {
+        int dspFileDescriptor = _open("/dev/dsp", flags, mode);
+        if(dspFileDescriptor != -1)
+            return dspFileDescriptor;
+        
+        return _open("/dev/dsp1", flags, mode);
+    }
+
     if (strcmp(pathname, "/dev/lbb") == 0)
     {
         hooks[BASEBOARD] = _open(HOOK_FILE_NAME, flags, mode);

src/lindbergh/lindbergh.c

@@ -1,4 +1,5 @@
 #include <dirent.h>
+#include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -12,6 +13,7 @@
 #define LD_PRELOAD "LD_PRELOAD"
 #define PRELOAD_FILE_NAME "lindbergh.so"
 #define TEAM "bobbydilley, retrofan, dkeruza-neo, doozer, francesco, rolel, caviar-x"
+#define LINDBERGH_CONFIG_PATH "LINDBERGH_CONFIG_PATH"
 
 uint32_t elf_crc = 0;
 
@@ -119,6 +121,7 @@ void printUsage(char *argv[])
     printf("  --list-controllers  Lists available controllers and inputs\n");
     printf("  --version           Displays the version of the loader and team's names\n");
     printf("  --help              Displays this usage text\n");
+    printf("  --config | -c       Specifies configuration path\n");
 }
 
 /**
@@ -248,8 +251,9 @@ int main(int argc, char *argv[])
     int gdb = 0;
     int forceGame = 0;
     int segaboot = 0;
-
+    char extConfigPath[PATH_MAX] = {0};
     char forceGamePath[128] = {0};
+
     for (int i = 1; i < argc; i++)
     {
         if (strcmp(argv[i], "-t") == 0 || strcmp(argv[i], "--test") == 0)
@@ -269,7 +273,16 @@ int main(int argc, char *argv[])
             gdb = 1;
             continue;
         }
-
+        if (strcmp(argv[i], "-c") == 0 || strcmp(argv[i], "--config") == 0)
+        {
+            if (i+1 >= argc)
+            {
+                break;
+            }
+            strncpy(extConfigPath, argv[i+1], PATH_MAX);
+            i += 1;
+            continue;
+        }
         // Treat the argument as the game name
         strcpy(forceGamePath, argv[i]);
         forceGame = 1;
@@ -305,6 +318,10 @@ int main(int argc, char *argv[])
         strcat(temp, command);
         strcpy(command, temp);
     }
+    if (extConfigPath[0] != '\0')
+    {
+        setenv(LINDBERGH_CONFIG_PATH,extConfigPath,1);
+    }
 
     log_info("Starting $ %s", command);
 

src/lindbergh/log.h

@@ -4,7 +4,6 @@
 
 #include <stdarg.h>
 #include <stdio.h>
-#include <time.h>
 
 
 // Structure to hold the formatted message and its size

src/lindbergh/securityboard.c

@@ -2,6 +2,7 @@
 
 #include "securityboard.h"
 #include "log.h"
+#include "config.h"
 
 #define SECURITY_BOARD_FRONT_PANEL 0x38
 #define SECURITY_BOARD_FRONT_PANEL_NON_ROOT 0x1038
@@ -51,8 +52,10 @@ int securityBoardSetDipResolution(int width, int height)
         setResolutionDips(1, 1, 0);
     else if (width == 1360 && height == 768)
         setResolutionDips(1, 1, 1);
-    else
+    else {
-        log_warn("Resolution not compatible, using 640 x 480\n");
+        if(getConfig()->showDebugMessages)
+            log_warn("Resolution not original, setting dips to 640 x 480.\n");
+    }
 
     return 0;
 }