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(LONG, 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   struct VoidBase*        VoidBase;
  51   BOOL                    running;
  52   ULONG                   signals;
  53
  54   /* Note that in OS4, we cannot call FindTask(NULL) here, since IExec
  55    * is inside AHIsubBase! */
  56   AudioCtrl  = (struct AHIAudioCtrlDrv*) SysBase->ThisTask->tc_UserData;
  57   AHIsubBase = (struct DriverBase*) dd->ahisubbase;
  58   VoidBase   = (struct VoidBase*) AHIsubBase;
  59
  60   dd->slavesignal = AllocSignal( -1 );
  61
  62   if( dd->slavesignal != -1 )
  63   {
  64     // Everything set up. Tell Master we're alive and healthy.
  65
  66     Signal( (struct Task*) dd->mastertask,
  67             1L << dd->mastersignal );
  68
  69     running = TRUE;
  70
  71     while( running )
  72     {
  73       signals = SetSignal(0L,0L);
  74
  75       if( signals & ( SIGBREAKF_CTRL_C | (1L << dd->slavesignal) ) )
  76       {
  77         running = FALSE;
  78       }
  79       else
  80       {
  81         CallHookPkt( AudioCtrl->ahiac_PlayerFunc, AudioCtrl, NULL );
  82         CallHookPkt( AudioCtrl->ahiac_MixerFunc, AudioCtrl, dd->mixbuffer );
  83
  84         // The mixing buffer is now filled with AudioCtrl->ahiac_BuffSamples
  85         // of sample frames (type AudioCtrl->ahiac_BuffType). Send them
  86         // to the sound card here.
  87       }
  88     }
  89   }
  90
  91   FreeSignal( dd->slavesignal );
  92   dd->slavesignal = -1;
  93
  94   Forbid();
  95
  96   // Tell the Master we're dying
  97
  98   Signal( (struct Task*) dd->mastertask,
  99           1L << dd->mastersignal );
 100
 101   dd->slavetask = NULL;
 102
 103   // Multitaking will resume when we are dead.
 104 }