out_sgi.c

   1 /*
   2
   3     PROGRAM_NAME PROGRAM_VERSION - PROGRAM_DESCRIPTION
   4
   5     Copyright (C) 2003 Angel Ortega <angel@triptico.com>
   6
   7     This program is free software; you can redistribute it and/or
   8     modify it under the terms of the GNU General Public License
   9     as published by the Free Software Foundation; either version 2
  10     of the License, or (at your option) any later version.
  11
  12     This program is distributed in the hope that it will be useful,
  13     but WITHOUT ANY WARRANTY; without even the implied warranty of
  14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15     GNU General Public License for more details.
  16
  17     You should have received a copy of the GNU General Public License
  18     along with this program; if not, write to the Free Software
  19     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20
  21     http://www.triptico.com
  22
  23 */
  24
  25 #include "config.h"
  26
  27 #ifdef SGI
  28
  29 #include <stdio.h>
  30 #include <dmedia/audio.h>
  31
  32 #include "core.h"
  33 #include "output.h"
  34
  35 /*******************
  36         Data
  37 ********************/
  38
  39 /* audio configuration */
  40 static ALconfig ac;
  41
  42 /* audio port */
  43 static ALport ap;
  44
  45 /* handmade buffering */
  46 #ifndef BUFFER_SIZE
  47 #define BUFFER_SIZE 65536
  48 #endif
  49
  50 static short int _buffer[BUFFER_SIZE];
  51 static int _bindex=0;
  52
  53
  54 /*******************
  55         Code
  56 ********************/
  57
  58 int _out_open_sgi(char * file)
  59 {
  60         ALpv p[1];
  61
  62         ac=alNewConfig();
  63
  64         if(!ac) return(-100);
  65
  66         if(alSetChannels(ac, AL_STEREO)==-1)
  67                 return(-101);
  68
  69         if(alSetWidth(ac, AL_SAMPLE_16)==-1)
  70                 return(-102);
  71
  72         if(alSetSampFmt(ac, AL_SAMPFMT_TWOSCOMP)==-1)
  73                 return(-103);
  74
  75         if(alSetQueueSize(ac, 131069)==-1)
  76                 return(-104);
  77
  78         if(alSetDevice(ac, AL_DEFAULT_OUTPUT)==-1)
  79                 return(-105);
  80
  81         p[0].param=AL_OUTPUT_RATE;
  82         p[0].value.ll=alDoubleToFixed((double)_frequency);
  83
  84         if(alSetParams(alGetDevice(ac), p, 1)==-1)
  85                 return(-106);
  86
  87         ap=alOpenPort("Ann Hell", "w", ac);
  88
  89         if(!ap) return(-107);
  90
  91         return(0);
  92 }
  93
  94
  95 int _out_write_sgi(float lsample, float rsample)
  96 {
  97         _buffer[_bindex++]=(short int) lsample;
  98         _buffer[_bindex++]=(short int) rsample;
  99
 100         if(_bindex==BUFFER_SIZE)
 101         {
 102                 alWriteFrames(ap, _buffer, BUFFER_SIZE / 2);
 103                 _bindex=0;
 104         }
 105
 106         return(0);
 107 }
 108
 109
 110 int _out_close_sgi(void)
 111 {
 112         alClosePort(ap);
 113         alFreeConfig(ac);
 114
 115         return(0);
 116 }
 117
 118 #endif /* SGI */