+
−/*
+
− * OpenAL Bridge - a simple portable library for OpenAL interface
+
− * Copyright (c) 2009 Vittorio Giovara <vittorio.giovara@gmail.com>
+
− *
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− * 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;
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−    
+
−    void *Malloc (size_t nbytes) {
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−        void *aptr;
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−        if ((aptr = malloc(nbytes)) == NULL) {
+
−            fprintf(stderr, "ERROR: not enough memory! malloc() failed\n");
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−            exit(-1);
+
−        }
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−        return aptr;
+
−    }
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−    
+
−    
+
−    void *Realloc (void *aptr, size_t nbytes) {
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−        aptr = realloc(aptr, nbytes);
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−        
+
−        if (aptr == NULL) {
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−            fprintf(stderr, "ERROR: not enough memory! realloc() failed\n");
+
−            free(aptr);
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−            exit(-1);
+
−        }
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−        return aptr;
+
−    }
+
−    
+
−    
+
−    FILE *Fopen (const char *fname, char *mode)	{
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−        FILE *fp;
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−        if ((fp=fopen(fname,mode)) == NULL)
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−            fprintf (stderr, "ERROR: can't open file %s in mode '%s'\n", fname, mode);
+
−        return fp;
+
−    }
+
−    
+
−    
+
−    ALint AlGetError (const char *str) {
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−        ALenum error;
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−        
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−        error = alGetError();
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−        if (error != AL_NO_ERROR) {
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−            fprintf(stderr, str, error);
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−            return -2;
+
−        } else 
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−            return AL_TRUE;
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−    }
+
−    
+
−    ALint AlGetError2 (const char *str, int num) {
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−        ALenum error;
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−        
+
−        error = alGetError();
+
−        if (error != AL_NO_ERROR) {
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−            fprintf(stderr, str, error, num);
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−            return -2;
+
−        } else 
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−            return AL_TRUE;
+
−    }
+
−    
+
−#ifndef _WIN32
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−    void *helper_fadein(void *tmp) 
+
−#else
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−    void *helper_fadein(void *tmp) 
+
−#endif
+
−    {
+
−        ALfloat gain;
+
−        ALfloat target_gain;
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−        fade_t *fade;
+
−        uint32_t index; 
+
−        uint16_t quantity; 
+
−        
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−        fade = tmp;
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−        index = fade->index;
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−        quantity = fade->quantity;
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−        free (fade);
+
−        
+
−#ifdef DEBUG
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−        fprintf(stderr, "Fade-out: index %d quantity %d\n", index, quantity);
+
−#endif
+
−        
+
−        /*save the volume desired after the fade*/
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−        alGetSourcef(Sources[index], AL_GAIN, &target_gain);
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−        if (target_gain > 1.0f || target_gain <= 0.0f)
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−            target_gain = 1.0f;
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−        
+
−        alSourcePlay(Sources[index]);
+
−        
+
−        for (gain = 0.0f ; gain <= target_gain; gain += (float) quantity/10000) {
+
−#ifdef DEBUG
+
−            fprintf(stderr, "Fade-in: Set gain to: %f\n", gain);
+
−#endif
+
−            alSourcef(Sources[index], AL_GAIN, gain);
+
−            usleep(10000);
+
−        }
+
−        
+
−        AlGetError("ERROR %d: Setting fade in volume\n");
+
−        
+
−#ifndef _WIN32
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−        pthread_exit(NULL);
+
−#else
+
−        _endthread();
+
−#endif
+
−        return 0;
+
−    }
+
−    
+
−    
+
−#ifndef _WIN32
+
−    void *helper_fadeout(void *tmp) 
+
−#else
+
−    void *helper_fadeout(void *tmp) 	
+
−#endif
+
−    {
+
−        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
+
−        fprintf(stderr, "Fade-out: index %d quantity %d\n", index, quantity);
+
−#endif
+
−        
+
−        alGetSourcef(Sources[index], AL_GAIN, &old_gain);
+
−        
+
−        for (gain = old_gain; gain >= 0.00f; gain -= (float) quantity/10000) {
+
−#ifdef DEBUG
+
−            fprintf(stderr, "Fade-out: Set gain to %f\n", gain);
+
−#endif
+
−            alSourcef(Sources[index], AL_GAIN, gain);
+
−            usleep(10000);
+
−        }
+
−        
+
−        AlGetError("ERROR %d: Setting fade out volume\n");
+
−        
+
−        /*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