workbench/devs/audio/audio_esys.c

   1 /*
   2      Copyright 2010, The AROS Development Team. All rights reserved.
   3      $Id$
   4  */
   5
   6 /*
   7  * audio.device
   8  *
   9  * by Nexus Development 2003
  10  * coded by Emanuele Cesaroni
  11  *
  12  * $Id$
  13  */
  14
  15 #include "audio_intern.h"
  16 #include <proto/dos.h>
  17
  18 /*
  19  *  InitSLAVE
  20  * -----------
  21  *
  22  * Initializes the slave process. Return 1 for successfull, 0 if fails.
  23  *
  24  */
  25
  26 STRPTR PROCESS_NAME = "audio.device slave";
  27
  28 BOOL InitSLAVE(struct IOAudio *ioaudio)
  29 {
  30     ULONG oldsignals;
  31
  32     struct TagItem NPTags[] =
  33     {
  34     { NP_Entry, (IPTR) & TaskBody },
  35     { NP_Name, (IPTR) PROCESS_NAME },
  36     { NP_Priority, 127 },
  37     { NP_StackSize, PROCESS_STACK },
  38     { TAG_DONE, 0 } };
  39
  40     ematsys = &ematsys0; // Here is inited the pointer.
  41     ematsys->ts_slavetask = NULL;
  42     ematsys->ts_initio = ioaudio; // This is the audioio used to wait the init signal from the slave process.
  43     ematsys->ts_opentask = FindTask(NULL);
  44     oldsignals = SetSignal(0, STOLEN_SIG);
  45
  46     if ((ematsys->ts_slavetask = (struct Task*) CreateNewProc(NPTags)))
  47     {
  48         Wait(STOLEN_SIG);
  49         if (ioaudio->ioa_Request.io_Error == IONOERROR)
  50         {
  51             SetSignal(oldsignals, STOLEN_SIG);
  52             return OKEY;
  53         }
  54
  55         ematsys->ts_slavetask = NULL;
  56     }
  57     SetSignal(oldsignals, STOLEN_SIG);
  58     return KEYO;
  59 }
  60
  61 /*
  62  *
  63  *  FreeSLAVE
  64  * -----------
  65  *
  66  * Frees the slave process.
  67  */
  68
  69 VOID FreeSLAVE(struct IOAudio *ioaudio)
  70 {
  71     if (ematsys->ts_slavetask)
  72     {
  73         audio_CLOSE(ioaudio, global_eta);
  74     }
  75 }
  76
  77 WORD GetMultiple(WORD d0, WORD d1)
  78 {
  79     WORD d2;
  80
  81     d2 = d0;
  82     d0 = d0 / d1;
  83     d0 = d0 * d1;
  84
  85     if (d0 == d2)
  86     {
  87         return d0;
  88     }
  89     else
  90     {
  91         return d0 + d1;
  92     }
  93 }
  94
  95 /*
  96  *
  97  *      InitESYS
  98  * ------------
  99  *
 100  *      Initialize some needed things for the system.
 101  *      0 success, 1 fail.
 102  */
 103
 104 BOOL InitESYS( VOID)
 105 {
 106     emasys = &emasys0; // Here initilized the pointer.
 107
 108     return 1;
 109
 110 }
 111
 112 /*
 113  *  FreeESYS
 114  * ----------
 115  *
 116  * Simply frees all the ESYS resources.
 117  *
 118  */
 119
 120 VOID FreeESYS( VOID)
 121 {
 122     emasys = &emasys0;
 123 }
 124