openalbridge/wrappers.c
author koda
Sun, 12 Jul 2009 15:42:54 +0000
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/*
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 * OpenAL Bridge - a simple portable library for OpenAL interface
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 * Copyright (c) 2009 Vittorio Giovara <vittorio.giovara@gmail.com>
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU Lesser General Public License as published by
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 * the Free Software Foundation; version 2 of the License
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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 */
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#include "wrappers.h"
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#ifdef __CPLUSPLUS
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extern "C" {
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#endif 
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    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) {
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            fprintf(stderr, "ERROR: not enough memory! malloc() failed\n");
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            exit(-1);
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        }
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        return aptr;
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    }
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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");
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            free(aptr);
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            exit(-1);
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        }
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        return aptr;
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    }
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    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);
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        return fp;
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    }
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    ALint AlGetError (const char *str) {
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        ALenum error;
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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;
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        } else 
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            return AL_TRUE;
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    }
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    ALint AlGetError2 (const char *str, int num) {
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        ALenum error;
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        error = alGetError();
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        if (error != AL_NO_ERROR) {
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            fprintf(stderr, str, error, num);
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            return -2;
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        } else 
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            return AL_TRUE;
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    }
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#ifndef _WIN32
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    void *helper_fadein(void *tmp) 
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#else
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    void *helper_fadein(void *tmp) 
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#endif
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    {
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        ALfloat gain;
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        ALfloat target_gain;
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        fade_t *fade;
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        uint32_t index; 
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        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);
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#ifdef DEBUG
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        fprintf(stderr, "Fade-out: index %d quantity %d\n", index, quantity);
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#endif
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        /*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]);
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        for (gain = 0.0f ; gain <= target_gain; gain += (float) quantity/10000) {
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#ifdef DEBUG
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            fprintf(stderr, "Fade-in: Set gain to: %f\n", gain);
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#endif
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            alSourcef(Sources[index], AL_GAIN, gain);
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            usleep(10000);
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        }
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        AlGetError("ERROR %d: Setting fade in volume\n");
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#ifndef _WIN32
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        pthread_exit(NULL);
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#else
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        _endthread();
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#endif
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        return 0;
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    }
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#ifndef _WIN32
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    void *helper_fadeout(void *tmp) 
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#else
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    void *helper_fadeout(void *tmp) 	
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#endif
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    {
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        ALfloat gain;
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        ALfloat old_gain;
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        fade_t *fade;
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        uint32_t index; 
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        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);
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#ifdef DEBUG
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        fprintf(stderr, "Fade-out: index %d quantity %d\n", index, quantity);
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#endif
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        alGetSourcef(Sources[index], AL_GAIN, &old_gain);
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        for (gain = old_gain; gain >= 0.00f; gain -= (float) quantity/10000) {
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#ifdef DEBUG
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            fprintf(stderr, "Fade-out: Set gain to %f\n", gain);
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#endif
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            alSourcef(Sources[index], AL_GAIN, gain);
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            usleep(10000);
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        }
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        AlGetError("ERROR %d: Setting fade out volume\n");
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        /*stop that sound and reset its volume*/
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        alSourceStop (Sources[index]);
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        alSourcef (Sources[index], AL_GAIN, old_gain);	
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#ifndef _WIN32
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        pthread_exit(NULL);
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#else
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        _endthread();
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#endif
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        return 0;
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    }
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#ifdef __CPLUSPLUS
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}
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82e7da49c26a -Smaxx' patch: checks for initialized openal + disables sound options if openal init fails
koda
parents: 2213
diff changeset
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#endif