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 "core.h"
  31 #include "output.h"
  32
  33 /* output drivers */
  34 #include "out_raw.h"
  35 #include "out_wav.h"
  36 #include "out_pipe.h"
  37 #include "out_oss.h"
  38 #include "out_sgi.h"
  39
  40 /*******************
  41         Data
  42 ********************/
  43
  44 static struct
  45 {
  46         char * name;
  47         int (* open)(char *);
  48         int (* write)(int, int);
  49         int (* close)(void);
  50 } _drivers[]={
  51         { "raw", _out_open_raw, _out_write_raw, _out_close_raw },
  52         { "wav", _out_open_wav, _out_write_wav, _out_close_wav },
  53         { "pipe", _out_open_pipe, _out_write_pipe, _out_close_pipe },
  54 #ifdef LINUX_OSS
  55         { "oss", _out_open_oss, _out_write_oss, _out_close_oss },
  56 #endif
  57 #ifdef SGI
  58         { "sgi", _out_open_sgi, _out_write_sgi, _out_close_sgi },
  59 #endif
  60         { NULL, NULL, NULL, NULL }
  61 };
  62
  63 /* driver in use */
  64 static int _driver=-1;
  65
  66 /*******************
  67         Code
  68 ********************/
  69
  70 void fput16(short int i, FILE * f)
  71 {
  72         fputc(i & 0x00ff, f);
  73         fputc((i & 0xff00) >> 8, f);
  74 }
  75
  76
  77 void fput32(int i, FILE * f)
  78 {
  79         fputc(i & 0x000000ff, f);
  80         fputc((i & 0x0000ff00) >> 8, f);
  81         fputc((i & 0x00ff0000) >> 16, f);
  82         fputc((i & 0xff000000) >> 24, f);
  83 }
  84
  85
  86 void trim_samples(int * left, int * right)
  87 {
  88         if(*left < -32768) *left=-32768;
  89         if(*left > 32767) *left=32767;
  90         if(*right < -32768) *right=-32768;
  91         if(*right > 32767) *right=32767;
  92 }
  93
  94
  95 int output_open(char * name, char * filename)
  96 {
  97         int n;
  98
  99         if(_driver != -1)
 100                 return(-1);
 101
 102         for(n=0;;n++)
 103         {
 104                 if(_drivers[n].name == NULL)
 105                         return(-2);
 106
 107                 if(strcmp(name, _drivers[n].name)==0)
 108                         break;
 109         }
 110
 111         _driver=n;
 112
 113         return(_drivers[_driver].open(filename));
 114 }
 115
 116
 117 int output_write(int lsample, int rsample)
 118 {
 119         trim_samples(&lsample, &rsample);
 120
 121         return(_drivers[_driver].write(lsample, rsample));
 122 }
 123
 124
 125 int output_close(void)
 126 {
 127         int r;
 128
 129         r=_drivers[_driver].close();
 130         _driver=-1;
 131
 132         return(r);
 133 }