prj/tech/libsrc/sndsrc/fileseg.cpp

   1 ////////////////////////////////////////////////////////////////////////
   2 // $Source: x:/prj/tech/libsrc/sndsrc/RCS/fileseg.cpp $
   3 // $Author: PATMAC $
   4 // $Date: 1997/06/24 16:36:48 $
   5 // $Revision: 1.2 $
   6 //
   7 // (c) 1997 Looking Glass Technologies Inc.
   8 // Pat McElhatton
   9 //
  10 // Module name: file sound segment reader
  11 // File name: fileseg.cpp
  12 //
  13 // Description: low-level fetch of sound data from a .WAV file
  14 //
  15 ////////////////////////////////////////////////////////////////////////
  16
  17 #include <sndsegi.h>
  18 #include <mprintf.h>
  19
  20 cFileSegment::cFileSegment()
  21 {
  22    mpInFile = NULL;
  23 }
  24
  25 cFileSegment::~cFileSegment()
  26 {
  27    if ( mpInFile != NULL ) {
  28       fclose( mpInFile );
  29    }
  30 }
  31
  32 void
  33 cFileSegment::Init( char         *pName,
  34                     uint32       offset,
  35                     sSndAttribs  *pAttribs,
  36                     BOOL         doDouble )
  37 {
  38    mpInFile = fopen( pName, "rb" );
  39    assert( mpInFile != NULL );
  40
  41    InitBase( offset, pAttribs, doDouble );
  42 }
  43
  44 void *
  45 cFileSegment::GetRawData( void    *pDst,
  46                           uint32  nBytes )
  47 {
  48    int nRead;
  49    if ( mNeedsSeek ) {
  50       fseek( mpInFile, mSrcOffset, SEEK_SET );
  51    }
  52    //mprintf("fileseg %x   %d bytes @ %d seek: %d\n", this, nBytes, mSrcOffset, mNeedsSeek);
  53    nRead = fread( pDst, 1, nBytes, mpInFile );
  54    assert( nRead == nBytes );
  55
  56    return pDst;
  57 }
  58