prj/tech/libsrc/sndutil/roneshot.c

   1 ////////////////////////////////////////////////////////////////////////
   2 //
   3 // (c) 1996 Looking Glass Technologies Inc.
   4 // Pat McElhatton
   5 //
   6 // Module name: Sound resource one-shot player
   7 // File name: roneshot.c
   8 //
   9 // Description: Play a sound resource in one-shot mode given its rez id
  10 //
  11 ////////////////////////////////////////////////////////////////////////
  12 #include <sndutil.h>
  13 #include <oneshot.h>
  14 #include <timelog.h>
  15 #include <mprintf.h>
  16 #include <memall.h>
  17
  18 //
  19 // getRezData - function to copy resource data into one-shot buffer
  20 //
  21 static void
  22 *getRezData( void     *pCBData,
  23              void     *pDst,
  24              uint32   nBytes )
  25 {
  26    sndOneShotStuff *pInfo;
  27
  28    pInfo = (sndOneShotStuff *) pCBData;
  29    ResExtractPartial( (Id) pInfo->extras[0], pDst, pInfo->playOffset, nBytes );
  30
  31    return pDst;
  32 }
  33
  34
  35 ////////////////////////////////////
  36 // CreateSoundRezOneShot - create a one-shot sound from a sound resource
  37 //
  38 // Takes:
  39 //    pMixer      audio mixer to play sounds on
  40 //    rezId       Id of sound resource to play
  41 //    endCB       app callback, invoked when sound is done playing
  42 //    pEndCBData  callback data for endCB
  43 //
  44 // Returns:     An ISndSample * that is ready to go.
  45 //
  46 ISndSample *
  47 CreateSoundRezOneShot( ISndMixer        *pMixer,
  48                        Id               rezId,
  49                        SndEndCallback   endCB,
  50                        void             *pEndCBData )
  51 {
  52    uint32 rezLen;
  53    ISndSample *pSample;
  54    sndOneShotStuff *pInfo;
  55
  56    pInfo = (sndOneShotStuff *) Malloc( sizeof( sndOneShotStuff ) );
  57    pInfo->extras[0] = rezId;
  58    rezLen = ResSize( rezId );
  59
  60    LOG2("CreateSoundRezOneShot %d rezId, %ld rezLen",
  61         rezId, rezLen );
  62    pSample = CreateSoundOneShot( pMixer, getRezData, pInfo, rezLen,
  63                                  endCB, pEndCBData );
  64         return pSample;
  65 }
  66