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