output.c

   1 /*
   2
   3     output.c
   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 <stdio.h>
  26 #include <string.h>
  27 #include "output.h"
  28
  29 /* output drivers */
  30 #include "out_raw.h"
  31 #include "out_wav.h"
  32 #include "out_pipe.h"
  33 #include "out_oss.h"
  34 #include "out_sgi.h"
  35
  36 /*******************
  37         Data
  38 ********************/
  39
  40 static struct
  41 {
  42         char * name;
  43         int (* open)(char *);
  44         int (* write)(int, int);
  45         int (* close)(void);
  46 } _drivers[]={
  47         { "raw", _out_open_raw, _out_write_raw, _out_close_raw },
  48         { "wav", _out_open_wav, _out_write_wav, _out_close_wav },
  49         { "pipe", _out_open_pipe, _out_write_pipe, _out_close_pipe },
  50 #ifdef LINUX_OSS
  51         { "oss", _out_open_oss, _out_write_oss, _out_close_oss },
  52 #endif
  53 #ifdef SGI
  54         { "sgi", _out_open_sgi, _out_write_sgi, _out_close_sgi },
  55 #endif
  56         { NULL, NULL, NULL, NULL }
  57 };
  58
  59 /* driver in use */
  60 static int _driver=-1;
  61
  62 /*******************
  63         Code
  64 ********************/
  65
  66 int fget16(FILE * f)
  67 {
  68         int c;
  69
  70         c=fgetc(f);
  71         c+=(fgetc(f) * 256);
  72
  73         return(c);
  74 }
  75
  76
  77 void fput16(short int i, FILE * f)
  78 {
  79         fputc(i & 0x00ff, f);
  80         fputc((i & 0xff00) >> 8, f);
  81 }
  82
  83
  84 int fget32(FILE * f)
  85 {
  86         int c;
  87
  88         c=fgetc(f);
  89         c+=(fgetc(f) * 256);
  90         c+=(fgetc(f) * 65536);
  91         c+=(fgetc(f) * 16777216);
  92
  93         return(c);
  94 }
  95
  96
  97 void fput32(int i, FILE * f)
  98 {
  99         fputc(i & 0x000000ff, f);
 100         fputc((i & 0x0000ff00) >> 8, f);
 101         fputc((i & 0x00ff0000) >> 16, f);
 102         fputc((i & 0xff000000) >> 24, f);
 103 }
 104
 105
 106 int output_open(char * name, char * filename)
 107 {
 108         int n;
 109
 110         if(_driver != -1)
 111                 return(-1);
 112
 113         for(n=0;;n++)
 114         {
 115                 if(_drivers[n].name == NULL)
 116                         return(-2);
 117
 118                 if(strcmp(name, _drivers[n].name)==0)
 119                         break;
 120         }
 121
 122         _driver=n;
 123
 124         return(_drivers[_driver].open(filename));
 125 }
 126
 127
 128 int output_write(int lsample, int rsample)
 129 {
 130         return(_drivers[_driver].write(lsample, rsample));
 131 }
 132
 133
 134 int output_close(void)
 135 {
 136         int r;
 137
 138         r=_drivers[_driver].close();
 139         _driver=-1;
 140
 141         return(r);
 142 }