/*
 * 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