SpiAssociate - Example Code

The following code illustrates how to create a data stream from the file system to the digital audio card.

#define         INCL_ERRORS
#include        "os2.h"
#include        "os2me.h"
#include        "mcd.h"
#include        "audio.h"

  ULONG         ulRC;                   /* Error return code     */
  HID           hidSource;              /* Source handler ID     */
  HSTREAM       hStream;                /* Stream handle         */
  HMMIO         hmmioIn;                /* Handle to MMIO file   */
  ACB_MMIO      acb;                 /* Associate control  */
                                        /* block used to      /*
                                        /* Associate the file to */
                                        /* stream (play) */
  SZ          RecordFileName[260] = {"d:\mmos2
  \data\mumme.wav"};

                            .
                            .
                            .
/*-----------------------------------------------------------*/
/*  Create a data stream from the file system to the digital */
/*  connected to the speakers. (See SpiCreateStream.)        */
/*-----------------------------------------------------------*/
                            .
                            .
                            .

/*-------------------------------------------------------*/
/*  USE MMIO to access a digital audio object.           */
/*-------------------------------------------------------*/

  if ((hmmioIn = mmioOpen(PlayFileName,
                          NULL,
                          MMIO_READWRITE|
                          MMIO_DENYNONE))== NULL)
    return(ERROR_FILE_NOT_FOUND);   /* error! */

/*--------------------------------------------------------*/
/*  Fill in acb with data object information.             */
/*--------------------------------------------------------*/
  acb.ulACBLen  = sizeof(ACB_MMIO);
  acb.ulObjType = ACBTYPE_MMIO;
  acb.hmmio     = hmmioIn;

/*--------------------------------------------------------------------*/
/*  Associate the digital audio data object with the source handler.  */
/*--------------------------------------------------------------------*/
  if (ulRC = SpiAssociate (hStream, hidSource, (PACB)&acb))
    return (ulRC);