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 "output.h"
  33
  34 /*******************
  35         Data
  36 ********************/
  37
  38 extern int _frequency;
  39
  40 /* audio configuration */
  41 static ALconfig ac;
  42
  43 /* audio port */
  44 static ALport ap;
  45
  46 /* handmade buffering */
  47 #ifndef BUFFER_SIZE
  48 #define BUFFER_SIZE 65536
  49 #endif
  50
  51 static short _buffer[BUFFER_SIZE];
  52 static int _bindex=0;
  53
  54
  55 /*******************
  56         Code
  57 ********************/
  58
  59 int _out_open_sgi(char * file)
  60 {
  61         ALpv p[1];
  62
  63         ac=alNewConfig();
  64
  65         if(!ac) return(-100);
  66
  67         if(alSetChannels(ac, AL_STEREO)==-1)
  68                 return(-101);
  69
  70         if(alSetWidth(ac, AL_SAMPLE_16)==-1)
  71                 return(-102);
  72
  73         if(alSetSampFmt(ac, AL_SAMPFMT_TWOSCOMP)==-1)
  74                 return(-103);
  75
  76         if(alSetQueueSize(ac, 131069)==-1)
  77                 return(-104);
  78
  79         if(alSetDevice(ac, AL_DEFAULT_OUTPUT)==-1)
  80                 return(-105);
  81
  82         p[0].param=AL_OUTPUT_RATE;
  83         p[0].value.ll=alDoubleToFixed((double)_frequency);
  84
  85         if(alSetParams(alGetDevice(ac), p, 1)==-1)
  86                 return(-106);
  87
  88         ap=alOpenPort("Ann Hell", "w", ac);
  89
  90         if(!ap) return(-107);
  91
  92         return(0);
  93 }
  94
  95
  96 int _out_write_sgi(int lsample, int rsample)
  97 {
  98         _buffer[_bindex++]=(short)lsample;
  99         _buffer[_bindex++]=(short)rsample;
 100
 101         if(_bindex==BUFFER_SIZE)
 102         {
 103                 alWriteFrames(ap, _buffer, BUFFER_SIZE / 2);
 104                 _bindex=0;
 105         }
 106
 107         return(0);
 108 }
 109
 110
 111 int _out_close_sgi(void)
 112 {
 113         alClosePort(ap);
 114         alFreeConfig(ac);
 115
 116         return(0);
 117 }
 118
 119 #endif /* SGI */