wavep.c

DSP c64优化 ACT spraa14 mp3优化实例 与其优化应用报告配套

/*____________________________________________________________________________
        
        FreeAmp - The Free MP3 Player

        MP3 Decoder originally Copyright (C) 1995-1997 Xing Technology
        Corp.  http://www.xingtech.com

        Portions Copyright (C) 1998-1999 EMusic.com

        This program is free software; you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        the Free Software Foundation; either version 2 of the License, or
        (at your option) any later version.

        This program is distributed in the hope that it will be useful,
        but WITHOUT ANY WARRANTY; without even the implied warranty of
        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        GNU General Public License for more details.

        You should have received a copy of the GNU General Public License
        along with this program; if not, write to the Free Software
        Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
____________________________________________________________________________*/

/*---- wavep.c --------------------------------------------

WAVE FILE HEADER ROUTINES
with conditional pcm conversion to MS wave format
portable version

-----------------------------------------------------------*/
#include <stdlib.h>
#include <stdio.h>
#include <float.h>
#include <math.h>
#ifndef __TI_COMPILER_VERSION__
#ifdef WIN32
#include <io.h>
#else
#include <unistd.h>
#endif
#endif
#include "port.h"

typedef struct
{
   unsigned char riff[4];
   unsigned char size[4];
   unsigned char wave[4];
   unsigned char fmt[4];
   unsigned char fmtsize[4];
   unsigned char tag[2];
   unsigned char nChannels[2];
   unsigned char nSamplesPerSec[4];
   unsigned char nAvgBytesPerSec[4];
   unsigned char nBlockAlign[2];
   unsigned char nBitsPerSample[2];
   unsigned char data[4];
   unsigned char pcm_bytes[4];
}
BYTE_WAVE;

/*----------------------------------------------------------------
  pcm conversion to wave format

  This conversion code required for big endian machine, or,
  if sizeof(short) != 16 bits.
  Conversion routines may be used on any machine, but if
  not required, the do nothing macros in port.h can be used instead
  to reduce overhead.

-----------------------------------------------------------------*/
#ifndef LITTLE_SHORT16
#include "wcvt.ch"
#endif
/*-----------------------------------------------*/
int cvt_to_wave_test()
{
/*-- test for valid compile ---*/

   return sizeof(short) - 2;


}
/*-----------------------------------------------*/

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