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/*
* Purpose: Helper functions used by audiofmt.c
*/
/*
*
* This file is part of Open Sound System.
*
* Copyright (C) 4Front Technologies 1996-2008.
*
* This this source file is released under GPL v2 license (no other versions).
* See the COPYING file included in the main directory of this source
* distribution for the license terms and conditions.
*
*/
/*ARGSUSED*/
static int
cnv_F8bits_T16bits (adev_p adev, dmap_p dmap, unsigned char **srcp, int *srcl,
unsigned char **tgtp, sample_parms * source, sample_parms * target)
{
unsigned char *p1 = *srcp;
short *p2 = (short*)*tgtp;
int len = *srcl;
int i, l;
VMEM_CHECK (p1, len);
VMEM_CHECK (p2, len * 2 / 1);
l = len / 1;
for (i = 0; i < l; i++)
p2[i] = ((int) p1[i] - 128) << 8;
*srcl = len * 2 / 1;
*srcp = (unsigned char*)p2;
*tgtp = p1;
return 0;
}
/*ARGSUSED*/
static int
cnv_F8bits_T32bits (adev_p adev, dmap_p dmap, unsigned char **srcp, int *srcl,
unsigned char **tgtp, sample_parms * source, sample_parms * target)
{
unsigned char *p1 = *srcp;
int *p2 = (int *)*tgtp;
int len = *srcl;
int i, l;
VMEM_CHECK (p1, len);
VMEM_CHECK (p2, len * 4 / 1);
l = len / 1;
for (i = 0; i < l; i++)
p2[i] = ((int) p1[i] - 128) << 24;
*srcl = len * 4 / 1;
*srcp = (unsigned char *)p2;
*tgtp = p1;
return 0;
}
/*ARGSUSED*/
static int
cnv_F16bits_T8bits (adev_p adev, dmap_p dmap, unsigned char **srcp, int *srcl,
unsigned char **tgtp, sample_parms * source, sample_parms * target)
{
short *p1 = (short*)*srcp;
unsigned char *p2 = *tgtp;
int len = *srcl;
int i, l;
VMEM_CHECK (p1, len);
VMEM_CHECK (p2, len * 1 / 2);
l = len / 2;
for (i = 0; i < l; i++)
p2[i] = (((int) p1[i]) >> 8) + 128;
*srcl = len * 1 / 2;
*srcp = (unsigned char *)p2;
*tgtp = (unsigned char *)p1;
return 0;
}
/*ARGSUSED*/
static int
cnv_F16bits_T32bits (adev_p adev, dmap_p dmap, unsigned char **srcp, int *srcl,
unsigned char **tgtp, sample_parms * source,
sample_parms * target)
{
short *p1 = (short *)*srcp;
int *p2 = (int *)*tgtp;
int len = *srcl;
int i, l;
VMEM_CHECK (p1, len);
VMEM_CHECK (p2, len * 4 / 2);
l = len / 2;
for (i = 0; i < l; i++)
p2[i] = ((int) p1[i]) << 16;
*srcl = len * 4 / 2;
*srcp = (unsigned char *)p2;
*tgtp = (unsigned char *)p1;
return 0;
}
/*ARGSUSED*/
static int
cnv_F32bits_T8bits (adev_p adev, dmap_p dmap, unsigned char **srcp, int *srcl,
unsigned char **tgtp, sample_parms * source, sample_parms * target)
{
int *p1 = (int*)*srcp;
unsigned char *p2 = *tgtp;
int len = *srcl;
int i, l;
VMEM_CHECK (p1, len);
VMEM_CHECK (p2, len * 1 / 4);
l = len / 4;
for (i = 0; i < l; i++)
p2[i] = (((int) p1[i]) >> 24) + 128;
*srcl = len * 1 / 4;
*srcp = p2;
*tgtp = (unsigned char *)p1;
return 0;
}
/*ARGSUSED*/
static int
cnv_F32bits_T16bits (adev_p adev, dmap_p dmap, unsigned char **srcp, int *srcl,
unsigned char **tgtp, sample_parms * source,
sample_parms * target)
{
int *p1 = (int *)*srcp;
short *p2 = (short *)*tgtp;
int len = *srcl;
int i, l;
VMEM_CHECK (p1, len);
VMEM_CHECK (p2, len * 2 / 4);
l = len / 4;
for (i = 0; i < l; i++)
p2[i] = (((int) p1[i]) >> 16);
*srcl = len * 2 / 4;
*srcp = (unsigned char *)p2;
*tgtp = (unsigned char *)p1;
return 0;
}
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