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 "config.h"
  26
  27 #include <stdio.h>
  28 #include <string.h>
  29
  30 #include "output.h"
  31
  32 /* output drivers */
  33 #include "out_raw.h"
  34 #include "out_wav.h"
  35 #include "out_pipe.h"
  36 #include "out_oss.h"
  37 #include "out_sgi.h"
  38
  39 /*******************
  40         Data
  41 ********************/
  42
  43 static struct
  44 {
  45         char * name;
  46         int (* open)(char *);
  47         int (* write)(int, int);
  48         int (* close)(void);
  49 } _drivers[]={
  50         { "raw", _out_open_raw, _out_write_raw, _out_close_raw },
  51         { "wav", _out_open_wav, _out_write_wav, _out_close_wav },
  52         { "pipe", _out_open_pipe, _out_write_pipe, _out_close_pipe },
  53 #ifdef LINUX_OSS
  54         { "oss", _out_open_oss, _out_write_oss, _out_close_oss },
  55 #endif
  56 #ifdef SGI
  57         { "sgi", _out_open_sgi, _out_write_sgi, _out_close_sgi },
  58 #endif
  59         { NULL, NULL, NULL, NULL }
  60 };
  61
  62 /* driver in use */
  63 static int _driver=-1;
  64
  65 /*******************
  66         Code
  67 ********************/
  68
  69 void fput16(short int i, FILE * f)
  70 {
  71         fputc(i & 0x00ff, f);
  72         fputc((i & 0xff00) >> 8, f);
  73 }
  74
  75
  76 void fput32(int i, FILE * f)
  77 {
  78         fputc(i & 0x000000ff, f);
  79         fputc((i & 0x0000ff00) >> 8, f);
  80         fputc((i & 0x00ff0000) >> 16, f);
  81         fputc((i & 0xff000000) >> 24, f);
  82 }
  83
  84
  85 void trim_samples(int * left, int * right)
  86 {
  87         if(*left < -32768) *left=-32768;
  88         if(*left > 32767) *left=32767;
  89         if(*right < -32768) *right=-32768;
  90         if(*right > 32767) *right=32767;
  91 }
  92
  93
  94 int output_open(char * name, char * filename)
  95 {
  96         int n;
  97
  98         if(_driver != -1)
  99                 return(-1);
 100
 101         for(n=0;;n++)
 102         {
 103                 if(_drivers[n].name == NULL)
 104                         return(-2);
 105
 106                 if(strcmp(name, _drivers[n].name)==0)
 107                         break;
 108         }
 109
 110         _driver=n;
 111
 112         return(_drivers[_driver].open(filename));
 113 }
 114
 115
 116 int output_write(int lsample, int rsample)
 117 {
 118         trim_samples(&lsample, &rsample);
 119
 120         return(_drivers[_driver].write(lsample, rsample));
 121 }
 122
 123
 124 int output_close(void)
 125 {
 126         int r;
 127
 128         r=_drivers[_driver].close();
 129         _driver=-1;
 130
 131         return(r);
 132 }