shithub: opus-tools

ref: ec08f7bd88bf6598ad8b666b7c4d2c1162487838
dir: /src/wav_io.h/

/* Copyright (C) 2002 Jean-Marc Valin
   File: wav_io.h

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met:

   - Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.

   - Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#ifndef WAV_IO_H
#define WAV_IO_H

#include <stdio.h>
#include <opus_types.h>

#if !defined(__LITTLE_ENDIAN__) && ( defined(WORDS_BIGENDIAN) || defined(__BIG_ENDIAN__) )
# define le_short(s) ((short) ((unsigned short) (s) << 8) | ((unsigned short) (s) >> 8))
# define be_short(s) ((short) (s))
#else
# define le_short(s) ((short) (s))
# define be_short(s) ((short) ((unsigned short) (s) << 8) | ((unsigned short) (s) >> 8))
#endif

/** Convert little endian */
static inline opus_int32 le_int(opus_int32 i)
{
#if !defined(__LITTLE_ENDIAN__) && ( defined(WORDS_BIGENDIAN) || defined(__BIG_ENDIAN__) )
   opus_uint32 ui, ret;
   ui = i;
   ret =  ui>>24;
   ret |= (ui>>8)&0x0000ff00;
   ret |= (ui<<8)&0x00ff0000;
   ret |= (ui<<24);
   return ret;
#else
   return i;
#endif
}

static inline float get_le_float(float *ptr)
{
#if !defined(__LITTLE_ENDIAN__) && ( defined(WORDS_BIGENDIAN) || defined(__BIG_ENDIAN__) )
    float val;
    char *lebytes = (char *)ptr;
    char *nebytes = (char *)&val;
    nebytes[0] = lebytes[3];
    nebytes[1] = lebytes[2];
    nebytes[2] = lebytes[1];
    nebytes[3] = lebytes[0];
    return val;
#else
    return *ptr;
#endif
}

static inline float get_be_float(float *ptr)
{
#if !defined(__LITTLE_ENDIAN__) && ( defined(WORDS_BIGENDIAN) || defined(__BIG_ENDIAN__) )
    return *ptr;
#else
    float val;
    char *bebytes = (char *)ptr;
    char *nebytes = (char *)&val;
    nebytes[0] = bebytes[3];
    nebytes[1] = bebytes[2];
    nebytes[2] = bebytes[1];
    nebytes[3] = bebytes[0];
    return val;
#endif
}

static inline void put_le_float(float *ptr, float val)
{
#if !defined(__LITTLE_ENDIAN__) && ( defined(WORDS_BIGENDIAN) || defined(__BIG_ENDIAN__) )
    char *lebytes = (char *)ptr;
    char *nebytes = (char *)&val;
    lebytes[0] = nebytes[3];
    lebytes[1] = nebytes[2];
    lebytes[2] = nebytes[1];
    lebytes[3] = nebytes[0];
#else
    *ptr = val;
#endif
}

void adjust_wav_mapping(int mapping_family, int channels, unsigned char *stream_map);

int write_wav_header(FILE *file, int rate, int mapping_family, int channels, int fp);
int update_wav_header(FILE *file, int format, opus_int64 audio_size);

#endif