workbench/devs/AHI/Drivers/Void/void-playslave.c

   1
   2 #include <config.h>
   3
   4 #include <devices/ahi.h>
   5 #include <exec/execbase.h>
   6 #include <libraries/ahi_sub.h>
   7
   8 #include "DriverData.h"
   9 #include "library.h"
  10
  11 #define dd ((struct VoidData*) AudioCtrl->ahiac_DriverData)
  12
  13 /******************************************************************************
  14 ** The slave process **********************************************************
  15 ******************************************************************************/
  16
  17 #undef SysBase
  18
  19 void Slave( struct ExecBase* SysBase );
  20
  21 #if defined( __AROS__ )
  22
  23 #include <aros/asmcall.h>
  24
  25 AROS_UFH3(void, SlaveEntry,
  26           AROS_UFHA(STRPTR, argPtr, A0),
  27           AROS_UFHA(ULONG, argSize, D0),
  28           AROS_UFHA(struct ExecBase *, SysBase, A6))
  29 {
  30    AROS_USERFUNC_INIT
  31    Slave( SysBase );
  32    AROS_USERFUNC_EXIT
  33 }
  34
  35 #else
  36
  37 void SlaveEntry(void)
  38 {
  39   struct ExecBase* SysBase = *((struct ExecBase**) 4);
  40
  41   Slave( SysBase );
  42 }
  43 #endif
  44
  45 void
  46 Slave( struct ExecBase* SysBase )
  47 {
  48   struct AHIAudioCtrlDrv* AudioCtrl;
  49   struct DriverBase*      AHIsubBase;
  50   BOOL                    running;
  51   ULONG                   signals;
  52
  53   /* Note that in OS4, we cannot call FindTask(NULL) here, since IExec
  54    * is inside AHIsubBase! */
  55   AudioCtrl  = (struct AHIAudioCtrlDrv*) FindTask(NULL)->tc_UserData;
  56   AHIsubBase = (struct DriverBase*) dd->ahisubbase;
  57
  58   dd->slavesignal = AllocSignal( -1 );
  59
  60   if( dd->slavesignal != -1 )
  61   {
  62     // Everything set up. Tell Master we're alive and healthy.
  63
  64     Signal( (struct Task*) dd->mastertask,
  65             1L << dd->mastersignal );
  66
  67     running = TRUE;
  68
  69     while( running )
  70     {
  71       signals = SetSignal(0L,0L);
  72
  73       if( signals & ( SIGBREAKF_CTRL_C | (1L << dd->slavesignal) ) )
  74       {
  75         running = FALSE;
  76       }
  77       else
  78       {
  79         CallHookPkt( AudioCtrl->ahiac_PlayerFunc, AudioCtrl, NULL );
  80         CallHookPkt( AudioCtrl->ahiac_MixerFunc, AudioCtrl, dd->mixbuffer );
  81
  82         // The mixing buffer is now filled with AudioCtrl->ahiac_BuffSamples
  83         // of sample frames (type AudioCtrl->ahiac_BuffType). Send them
  84         // to the sound card here.
  85       }
  86     }
  87   }
  88
  89   FreeSignal( dd->slavesignal );
  90   dd->slavesignal = -1;
  91
  92   Forbid();
  93
  94   // Tell the Master we're dying
  95
  96   Signal( (struct Task*) dd->mastertask,
  97           1L << dd->mastersignal );
  98
  99   dd->slavetask = NULL;
 100
 101   // Multitaking will resume when we are dead.
 102 }