/*

* 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"

#include "openalbridge_t.h"

extern ALint *Sources;

void *Malloc (size_t nbytes) {

    void *aptr;

    if ((aptr = malloc(nbytes)) == NULL) {

        fprintf(stderr,"(Bridge Fatal Error) - not enough memory");

        abort();

    }

    return aptr;

}

void *Realloc (void *aptr, size_t nbytes) {

    aptr = realloc(aptr, nbytes);

    if (aptr == NULL) {

        fprintf(stderr,"(Bridge Fatal Error) - not enough memory");

        abort();

    }

    return aptr;

}

FILE *Fopen (const char *fname, char *mode)	{

    FILE *fp;

    fp = fopen(fname,mode);

    if (fp == NULL)

        fprintf(stderr,"(Bridge Error) - can't open file %s in mode '%s'", fname, mode);

    return fp;

}

void helper_fade(void *tmp) {

    ALfloat gain;

    ALfloat target_gain;

    fade_t *fade;

    uint32_t index;

    uint16_t quantity;

    al_fade_t type;

    fade = tmp;

    index = fade->index;

    quantity = fade->quantity;

    type = fade->type;

    free (fade);

    if (type == AL_FADE_IN) {

#ifdef DEBUG

        fprintf(stderr,"(Bridge Info) - Fade-in in progress [index %d quantity %d]", 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);

        }

    } else {

        alGetSourcef(Sources[index], AL_GAIN, &target_gain);

        for (gain = target_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);

        }

        if (AL_NO_ERROR != alGetError())

            fprintf(stderr,"(Bridge Warning) - Failed to set fade-out effect");

        // stop that sound and reset its volume

        alSourceStop (Sources[index]);

        alSourcef (Sources[index], AL_GAIN, target_gain);

    }

    if (AL_NO_ERROR != alGetError())

        fprintf(stderr,"(Bridge Warning) - Failed to set fade effect");

#ifndef _WIN32

    pthread_exit(NULL);

#else

    _endthread();

#endif

}