misc/openalbridge/wrappers.c
author koda
Thu, 22 Apr 2010 17:43:12 +0000
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permissions -rw-r--r--
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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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#include "openalbridge_t.h"
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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,"(Bridge Fatal Error) - not enough memory");
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        abort();
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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,"(Bridge Fatal Error) - not enough memory");
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        abort();
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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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    fp = fopen(fname,mode);
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    if (fp == NULL)
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        fprintf(stderr,"(Bridge Error) - can't open file %s in mode '%s'", fname, mode);
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    return fp;
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}
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void helper_fade(void *tmp) {
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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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    al_fade_t type;
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    fade = tmp;
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    index = fade->index;
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    quantity = fade->quantity;
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    type = fade->type;
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    free (fade);
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    if (type == AL_FADE_IN) {
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#ifdef DEBUG
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        err_msg("(%s) INFO - Fade-in in progress [index %d quantity %d]", prog, 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 TRACE
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            err_msg("(%s) DEBUG - Fade-in set gain to %f", 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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    } else {
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        alGetSourcef(Sources[index], AL_GAIN, &target_gain);
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        for (gain = target_gain; gain >= 0.00f; gain -= (float) quantity/10000) {
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#ifdef TRACE
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            err_msg("(%s) DEBUG - Fade-out set gain to %f", 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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        if (AL_NO_ERROR != alGetError())
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            fprintf(stderr,"(Bridge Warning) - Failed to set fade-out effect");
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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, target_gain);
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    }
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    if (AL_NO_ERROR != alGetError())
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        fprintf(stderr,"(Bridge Warning) - Failed to set fade effect");
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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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}
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