/*

 * 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