1 /*

     2  * OpenAL Bridge - a simple portable library for OpenAL interface

     3  * Copyright (c) 2009 Vittorio Giovara <vittorio.giovara@gmail.com>

     4  *

     5  * This program is free software; you can redistribute it and/or modify

     6  * it under the terms of the GNU Lesser General Public License as published by

     7  * the Free Software Foundation; version 2 of the License

     8  *

     9  * This program is distributed in the hope that it will be useful,

    10  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    12  * GNU Lesser General Public License for more details.

    13  *

    14  * You should have received a copy of the GNU Lesser General Public License

    15  * along with this program; if not, write to the Free Software

    16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA

    17  */

    18 

    19 #include "wrappers.h"

    20 

    21 

    22 #ifdef __CPLUSPLUS

    23 extern "C" {

    24 #endif 

    25         

    26         extern ALint *Sources;

    27         

    28         void *Malloc (size_t nbytes) {

    29                 void *aptr;

    30                 

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

    32                         err_dump("(%s) FATAL - not enough memory");

    33                 

    34                 return aptr;

    35         }

    36         

    37         

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

    39                 aptr = realloc(aptr, nbytes);

    40                 

    41                 if (aptr == NULL) 

    42                         err_dump("(%s) FATAL - not enough memory");

    43                 

    44                 return aptr;

    45         }

    46         

    47         

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

    49                 FILE *fp;

    50                 

    51                 fp = fopen(fname,mode);

    52                 if (fp == NULL)

    53                         err_ret("(%s) ERROR - can't open file %s in mode '%s'", prog, fname, mode);

    54                 

    55                 return fp;

    56         }

    57         

    58         /*TODO make a proper error reporting routine*/

    59         ALint AlGetError (const char *str) {

    60                 ALenum error;

    61                 

    62                 error = alGetError();

    63                 if (error != AL_NO_ERROR) {

    64                         err_msg(str, prog);

    65                         return error;

    66                 } else 

    67                         return AL_TRUE;

    68         }

    69         

    70         ALint AlGetError2 (const char *str, int num) {

    71                 ALenum error;

    72                 

    73                 error = alGetError();

    74                 if (error != AL_NO_ERROR) {

    75                         err_msg(str, prog, num);

    76                         return error;

    77                 } else 

    78                         return AL_TRUE;

    79         }

    80         

    81         void *helper_fadein(void *tmp) {

    82                 ALfloat gain;

    83                 ALfloat target_gain;

    84                 fade_t *fade;

    85                 uint32_t index; 

    86                 uint16_t quantity; 

    87                 

    88                 fade = tmp;

    89                 index = fade->index;

    90                 quantity = fade->quantity;

    91                 free (fade);

    92                 

    93 #ifdef DEBUG

    94                 err_msg("(%s) INFO - Fade-in in progress [index %d quantity %d]", prog, index, quantity);

    95 #endif

    96                 

    97                 /*save the volume desired after the fade*/

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

    99                 if (target_gain > 1.0f || target_gain <= 0.0f)

   100                         target_gain = 1.0f;

   101                 

   102                 alSourcePlay(Sources[index]);

   103                 

   104                 for (gain = 0.0f ; gain <= target_gain; gain += (float) quantity/10000) {

   105 #ifdef TRACE

   106                         err_msg("(%s) DEBUG - Fade-in set gain to %f", gain);

   107 #endif

   108                         alSourcef(Sources[index], AL_GAIN, gain);

   109                         usleep(10000);

   110                 }

   111                 

   112                 AlGetError("(%s) WARN - Failed to set fade-in volume level");

   113                 

   114 #ifndef _WIN32

   115                 pthread_exit(NULL);

   116 #else

   117                 _endthread();

   118 #endif

   119                 return 0;

   120         }

   121         

   122         void *helper_fadeout(void *tmp) {

   123                 ALfloat gain;

   124                 ALfloat old_gain;

   125                 fade_t *fade;

   126                 uint32_t index; 

   127                 uint16_t quantity; 

   128                 

   129                 fade = tmp;

   130                 index = fade->index;

   131                 quantity = fade->quantity;

   132                 free(fade);

   133                 

   134 #ifdef DEBUG

   135                 err_msg("(%s) INFO - Fade-out in progress [index %d quantity %d]", prog, index, quantity);

   136 #endif

   137                 

   138                 alGetSourcef(Sources[index], AL_GAIN, &old_gain);

   139                 

   140                 for (gain = old_gain; gain >= 0.00f; gain -= (float) quantity/10000) {

   141 #ifdef TRACE

   142                         err_msg("(%s) DEBUG - Fade-out set gain to %f", gain);

   143 #endif

   144                         alSourcef(Sources[index], AL_GAIN, gain);

   145                         usleep(10000);

   146                 }

   147                 

   148                 AlGetError("(%s) WARN - Failed to set fade-out volume level");

   149                 

   150                 /*stop that sound and reset its volume*/

   151                 alSourceStop (Sources[index]);

   152                 alSourcef (Sources[index], AL_GAIN, old_gain);	

   153                 

   154 #ifndef _WIN32

   155                 pthread_exit(NULL);

   156 #else

   157                 _endthread();

   158 #endif

   159                 return 0;

   160         }

   161         

   162         

   163 #ifdef __CPLUSPLUS

   164 }

   165 #endif