examples/sgi.c

   1 /*
   2         Audio File Library
   3
   4         Copyright 1998-1999, Michael Pruett <michael@68k.org>
   5
   6         This program is free software; you can redistribute it and/or
   7         modify it under the terms of the GNU General Public License as
   8         published by the Free Software Foundation; either version 2 of
   9         the License, or (at your option) any later version.
  10
  11         This program is distributed in the hope that it will be
  12         useful, but WITHOUT ANY WARRANTY; without even the implied
  13         warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  14         PURPOSE.  See the GNU General Public License for more details.
  15
  16         You should have received a copy of the GNU General Public
  17         License along with this program; if not, write to the Free
  18         Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  19         MA 02111-1307, USA.
  20 */
  21
  22 /*
  23         sgi.c
  24
  25         These routines are used in SGI-specific test programs.
  26 */
  27
  28 #ifdef HAVE_CONFIG_H
  29 #include <config.h>
  30 #endif
  31
  32 #include <stdio.h>
  33 #include <unistd.h>
  34
  35 #include <audiofile.h>
  36
  37 #include <dmedia/audio.h>
  38
  39 /*
  40         Set the sample width of an audio configuration.
  41 */
  42 void setwidth (ALconfig config, int sampleWidth)
  43 {
  44         if (sampleWidth <= 8)
  45         {
  46                 printf("setting width to 8\n");
  47                 alSetWidth(config, AL_SAMPLE_8);
  48         }
  49         else if (sampleWidth <= 16)
  50         {
  51                 printf("setting width to 16\n");
  52                 alSetWidth(config, AL_SAMPLE_16);
  53         }
  54         else if (sampleWidth <= 24)
  55         {
  56                 printf("setting width to 24\n");
  57                 alSetWidth(config, AL_SAMPLE_24);
  58         }
  59 }
  60
  61 /*
  62         Set the sample format of an audio configuration.
  63 */
  64 void setsampleformat (ALconfig config, int audioFileSampleFormat)
  65 {
  66         if (audioFileSampleFormat == AF_SAMPFMT_TWOSCOMP)
  67         {
  68                 printf("setting sample format to 2's complement\n");
  69                 alSetSampFmt(config, AL_SAMPFMT_TWOSCOMP);
  70         }
  71         else if (audioFileSampleFormat == AF_SAMPFMT_FLOAT)
  72         {
  73                 printf("setting sample format to float\n");
  74                 alSetSampFmt(config, AL_SAMPFMT_FLOAT);
  75         }
  76         else if (audioFileSampleFormat == AF_SAMPFMT_DOUBLE)
  77         {
  78                 printf("setting sample format to double\n");
  79                 alSetSampFmt(config, AL_SAMPFMT_DOUBLE);
  80         }
  81 }
  82
  83 /*
  84         Set the sample rate of an audio port.
  85 */
  86 void setrate (ALport port, double rate)
  87 {
  88         int             rv;
  89         ALpv    params;
  90
  91         rv = alGetResource(port);
  92
  93         params.param = AL_RATE;
  94         params.value.ll = alDoubleToFixed(rate);
  95
  96         if (alSetParams(rv, &params, 1) < 0)
  97         {
  98                 printf("alSetParams failed: %s\n", alGetErrorString(oserror()));
  99         }
 100 }
 101
 102 /*
 103         Wait until the audio port has no more samples to play.
 104 */
 105 void waitport (ALport port)
 106 {
 107         while (alGetFilled(port) > 0)
 108                 sginap(1);
 109 }