arch/sdl/rbaudio.c

   1 /* $Id: rbaudio.c,v 1.5 2003-03-15 13:12:07 btb Exp $ */
   2 /*
   3  *
   4  * SDL CD Audio functions
   5  *
   6  *
   7  */
   8
   9 #ifdef HAVE_CONFIG_H
  10 #include <conf.h>
  11 #endif
  12
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15
  16 #include <SDL.h>
  17
  18 #ifdef __linux__
  19 #include <sys/ioctl.h>
  20 #include <linux/cdrom.h>
  21 #endif
  22
  23 #include "pstypes.h"
  24 #include "error.h"
  25 #include "args.h"
  26 #include "rbaudio.h"
  27
  28 static SDL_CD *s_cd = NULL;
  29 extern int Redbook_playing;
  30 static int initialised = 0;
  31
  32 void RBAExit()
  33 {
  34         if (initialised)
  35         {
  36                 SDL_CDStop(s_cd);
  37                 SDL_CDClose(s_cd);
  38         }
  39 }
  40
  41 void RBAInit()
  42 {
  43         if (initialised) return;
  44         if (FindArg("-nocdrom")) return;
  45
  46         if (SDL_Init(SDL_INIT_CDROM) < 0)
  47         {
  48                 Warning("SDL library initialisation failed: %s.",SDL_GetError());
  49                 return;
  50         }
  51
  52         if (SDL_CDNumDrives() == 0)
  53         {
  54                 Warning("No cdrom drives found!\n");
  55                 return;
  56         }
  57         s_cd = SDL_CDOpen(0);
  58         if (s_cd == NULL) {
  59                 Warning("Could not open cdrom for redbook audio!\n");
  60                 return;
  61         }
  62         atexit(RBAExit);
  63         initialised = 1;
  64 }
  65
  66 int RBAEnabled()
  67 {
  68         return 1;
  69 }
  70
  71 void RBARegisterCD()
  72 {
  73
  74 }
  75
  76 int RBAPlayTrack(int a)
  77 {
  78         if (!initialised) return -1;
  79
  80         if (CD_INDRIVE(SDL_CDStatus(s_cd)) ) {
  81                 SDL_CDPlayTracks(s_cd, a-1, 0, 0, 0);
  82         }
  83         return a;
  84 }
  85
  86 void RBAStop()
  87 {
  88         if (!initialised) return;
  89         SDL_CDStop(s_cd);
  90 }
  91
  92 void RBASetVolume(int volume)
  93 {
  94 #ifdef __linux__
  95         int cdfile, level;
  96         struct cdrom_volctrl volctrl;
  97
  98         if (!initialised) return;
  99
 100         cdfile = s_cd->id;
 101         level = volume * 3;
 102
 103         if ((level<0) || (level>255)) {
 104                 fprintf(stderr, "illegal volume value (allowed values 0-255)\n");
 105                 return;
 106         }
 107
 108         volctrl.channel0
 109                 = volctrl.channel1
 110                 = volctrl.channel2
 111                 = volctrl.channel3
 112                 = level;
 113         if ( ioctl(cdfile, CDROMVOLCTRL, &volctrl) == -1 ) {
 114                 fprintf(stderr, "CDROMVOLCTRL ioctl failed\n");
 115                 return;
 116         }
 117 #endif
 118 }
 119
 120 void RBAPause()
 121 {
 122         if (!initialised) return;
 123         SDL_CDPause(s_cd);
 124 }
 125
 126 int RBAResume()
 127 {
 128         if (!initialised) return -1;
 129         SDL_CDResume(s_cd);
 130         return 1;
 131 }
 132
 133 int RBAGetNumberOfTracks()
 134 {
 135         if (!initialised) return -1;
 136         SDL_CDStatus(s_cd);
 137         return s_cd->numtracks;
 138 }
 139
 140 int RBAPlayTracks(int tracknum,int something)
 141 {
 142         if (!initialised) return -1;
 143         if (CD_INDRIVE(SDL_CDStatus(s_cd)) ) {
 144                 SDL_CDPlayTracks(s_cd, tracknum-1, 0, 0, 0);
 145         }
 146         return tracknum;
 147 }
 148
 149 int RBAGetTrackNum()
 150 {
 151         if (!initialised) return -1;
 152         SDL_CDStatus(s_cd);
 153         return s_cd->cur_track;
 154 }
 155
 156 int RBAPeekPlayStatus()
 157 {
 158         return (SDL_CDStatus(s_cd) == CD_PLAYING);
 159 }
 160
 161 int CD_blast_mixer()
 162 {
 163         return 0;
 164 }