--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/openalbridge/wrappers.c	Sat Apr 17 08:30:34 2010 +0000
@@ -0,0 +1,165 @@
+/*
+ * OpenAL Bridge - a simple portable library for OpenAL interface
+ * Copyright (c) 2009 Vittorio Giovara <vittorio.giovara@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; version 2 of the License
+ *
+ * This program 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#include "wrappers.h"
+
+
+#ifdef __CPLUSPLUS
+extern "C" {
+#endif 
+    
+    extern ALint *Sources;
+    
+    void *Malloc (size_t nbytes) {
+        void *aptr;
+        
+        if ((aptr = malloc(nbytes)) == NULL)
+            err_dump("(%s) FATAL - not enough memory");
+        
+        return aptr;
+    }
+    
+    
+    void *Realloc (void *aptr, size_t nbytes) {
+        aptr = realloc(aptr, nbytes);
+        
+        if (aptr == NULL) 
+            err_dump("(%s) FATAL - not enough memory");
+        
+        return aptr;
+    }
+    
+    
+    FILE *Fopen (const char *fname, char *mode)	{
+        FILE *fp;
+        
+        fp = fopen(fname,mode);
+        if (fp == NULL)
+            err_ret("(%s) ERROR - can't open file %s in mode '%s'", prog, fname, mode);
+        
+        return fp;
+    }
+    
+    /*TODO make a proper error reporting routine*/
+    ALint AlGetError (const char *str) {
+        ALenum error;
+        
+        error = alGetError();
+        if (error != AL_NO_ERROR) {
+            err_msg(str, prog);
+            return error;
+        } else 
+            return AL_TRUE;
+    }
+    
+    ALint AlGetError2 (const char *str, int num) {
+        ALenum error;
+        
+        error = alGetError();
+        if (error != AL_NO_ERROR) {
+            err_msg(str, prog, num);
+            return error;
+        } else 
+            return AL_TRUE;
+    }
+    
+    void *helper_fadein(void *tmp) {
+        ALfloat gain;
+        ALfloat target_gain;
+        fade_t *fade;
+        uint32_t index; 
+        uint16_t quantity; 
+        
+        fade = tmp;
+        index = fade->index;
+        quantity = fade->quantity;
+        free (fade);
+        
+#ifdef DEBUG
+        err_msg("(%s) INFO - Fade-in in progress [index %d quantity %d]", prog, index, quantity);
+#endif
+        
+        /*save the volume desired after the fade*/
+        alGetSourcef(Sources[index], AL_GAIN, &target_gain);
+        if (target_gain > 1.0f || target_gain <= 0.0f)
+            target_gain = 1.0f;
+        
+        alSourcePlay(Sources[index]);
+        
+        for (gain = 0.0f ; gain <= target_gain; gain += (float) quantity/10000) {
+#ifdef TRACE
+            err_msg("(%s) DEBUG - Fade-in set gain to %f", gain);
+#endif
+            alSourcef(Sources[index], AL_GAIN, gain);
+            usleep(10000);
+        }
+        
+        AlGetError("(%s) WARN - Failed to set fade-in volume level");
+        
+#ifndef _WIN32
+        pthread_exit(NULL);
+#else
+        _endthread();
+#endif
+        return 0;
+    }
+    
+    void *helper_fadeout(void *tmp) {
+        ALfloat gain;
+        ALfloat old_gain;
+        fade_t *fade;
+        uint32_t index; 
+        uint16_t quantity; 
+        
+        fade = tmp;
+        index = fade->index;
+        quantity = fade->quantity;
+        free(fade);
+        
+#ifdef DEBUG
+        err_msg("(%s) INFO - Fade-out in progress [index %d quantity %d]", prog, index, quantity);
+#endif
+        
+        alGetSourcef(Sources[index], AL_GAIN, &old_gain);
+        
+        for (gain = old_gain; gain >= 0.00f; gain -= (float) quantity/10000) {
+#ifdef TRACE
+            err_msg("(%s) DEBUG - Fade-out set gain to %f", gain);
+#endif
+            alSourcef(Sources[index], AL_GAIN, gain);
+            usleep(10000);
+        }
+        
+        AlGetError("(%s) WARN - Failed to set fade-out volume level");
+        
+        /*stop that sound and reset its volume*/
+        alSourceStop (Sources[index]);
+        alSourcef (Sources[index], AL_GAIN, old_gain);	
+        
+#ifndef _WIN32
+        pthread_exit(NULL);
+#else
+        _endthread();
+#endif
+        return 0;
+    }
+    
+    
+#ifdef __CPLUSPLUS
+}
+#endif