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Sweden-Number/dlls/dsound/dsound_convert.c

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/* DirectSound format conversion and mixing routines
*
* Copyright 2007 Maarten Lankhorst
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
/* 8 bits is unsigned, the rest is signed.
* First I tried to reuse existing stuff from alsa-lib, after that
* didn't work, I gave up and just went for individual hacks.
*
* 24 bit is expensive to do, due to unaligned access.
* In dlls/winex11.drv/dib_convert.c convert_888_to_0888_asis there is a way
* around it, but I'm happy current code works, maybe something for later.
*
* The ^ 0x80 flips the signed bit, this is the conversion from
* signed (-128.. 0.. 127) to unsigned (0...255)
* This is only temporary: All 8 bit data should be converted to signed.
* then when fed to the sound card, it should be converted to unsigned again.
*
* Sound is LITTLE endian
*/
#include "config.h"
#include <stdarg.h>
#define NONAMELESSSTRUCT
#define NONAMELESSUNION
#include "windef.h"
#include "winbase.h"
#include "mmsystem.h"
#include "winternl.h"
#include "wine/debug.h"
#include "dsound.h"
#include "dsdriver.h"
#include "dsound_private.h"
WINE_DEFAULT_DEBUG_CHANNEL(dsound);
#ifdef WORDS_BIGENDIAN
#define le16(x) RtlUshortByteSwap((x))
#define le32(x) RtlUlongByteSwap((x))
#else
#define le16(x) (x)
#define le32(x) (x)
#endif
static inline void src_advance(const void **src, UINT stride, INT *count, UINT *freqAcc, UINT adj)
{
*freqAcc += adj;
if (*freqAcc >= (1 << DSOUND_FREQSHIFT))
{
ULONG adv = (*freqAcc >> DSOUND_FREQSHIFT);
*freqAcc &= (1 << DSOUND_FREQSHIFT) - 1;
*(const char **)src += adv * stride;
*count -= adv;
}
}
static void convert_8_to_8 (const void *src, void *dst, UINT src_stride,
UINT dst_stride, INT count, UINT freqAcc, UINT adj)
{
while (count > 0)
{
*(BYTE *)dst = *(const BYTE *)src;
dst = (char *)dst + dst_stride;
src_advance(&src, src_stride, &count, &freqAcc, adj);
}
}
static void convert_8_to_16 (const void *src, void *dst, UINT src_stride,
UINT dst_stride, INT count, UINT freqAcc, UINT adj)
{
while (count > 0)
{
WORD dest = *(const BYTE *)src, *dest16 = dst;
*dest16 = le16(dest * 257 - 32768);
dst = (char *)dst + dst_stride;
src_advance(&src, src_stride, &count, &freqAcc, adj);
}
}
static void convert_8_to_24 (const void *src, void *dst, UINT src_stride,
UINT dst_stride, INT count, UINT freqAcc, UINT adj)
{
while (count > 0)
{
BYTE dest = *(const BYTE *)src;
BYTE *dest24 = dst;
dest24[0] = dest;
dest24[1] = dest;
dest24[2] = dest - 0x80;
dst = (char *)dst + dst_stride;
src_advance(&src, src_stride, &count, &freqAcc, adj);
}
}
static void convert_8_to_32 (const void *src, void *dst, UINT src_stride,
UINT dst_stride, INT count, UINT freqAcc, UINT adj)
{
while (count > 0)
{
DWORD dest = *(const BYTE *)src, *dest32 = dst;
*dest32 = le32(dest * 16843009 - 2147483648U);
dst = (char *)dst + dst_stride;
src_advance(&src, src_stride, &count, &freqAcc, adj);
}
}
static void convert_16_to_8 (const void *src, void *dst, UINT src_stride,
UINT dst_stride, INT count, UINT freqAcc, UINT adj)
{
while (count > 0)
{
BYTE *dst8 = dst;
*dst8 = (le16(*(const WORD *)src)) / 256;
*dst8 -= 0x80;
dst = (char *)dst + dst_stride;
src_advance(&src, src_stride, &count, &freqAcc, adj);
}
}
static void convert_16_to_16 (const void *src, void *dst, UINT src_stride,
UINT dst_stride, INT count, UINT freqAcc, UINT adj)
{
while (count > 0)
{
*(WORD *)dst = *(const WORD *)src;
dst = (char *)dst + dst_stride;
src_advance(&src, src_stride, &count, &freqAcc, adj);
}
}
static void convert_16_to_24 (const void *src, void *dst, UINT src_stride,
UINT dst_stride, INT count, UINT freqAcc, UINT adj)
{
while (count > 0)
{
WORD dest = le16(*(const WORD *)src);
BYTE *dest24 = dst;
dest24[0] = dest / 256;
dest24[1] = dest;
dest24[2] = dest / 256;
dst = (char *)dst + dst_stride;
src_advance(&src, src_stride, &count, &freqAcc, adj);
}
}
static void convert_16_to_32 (const void *src, void *dst, UINT src_stride,
UINT dst_stride, INT count, UINT freqAcc, UINT adj)
{
while (count > 0)
{
DWORD dest = *(const WORD *)src, *dest32 = dst;
*dest32 = dest * 65537;
dst = (char *)dst + dst_stride;
src_advance(&src, src_stride, &count, &freqAcc, adj);
}
}
static void convert_24_to_8 (const void *src, void *dst, UINT src_stride,
UINT dst_stride, INT count, UINT freqAcc, UINT adj)
{
while (count > 0)
{
BYTE *dst8 = dst;
*dst8 = ((const BYTE *)src)[2];
dst = (char *)dst + dst_stride;
src_advance(&src, src_stride, &count, &freqAcc, adj);
}
}
static void convert_24_to_16 (const void *src, void *dst, UINT src_stride,
UINT dst_stride, INT count, UINT freqAcc, UINT adj)
{
while (count > 0)
{
WORD *dest16 = dst;
const BYTE *source = src;
*dest16 = le16(source[2] * 256 + source[1]);
dst = (char *)dst + dst_stride;
src_advance(&src, src_stride, &count, &freqAcc, adj);
}
}
static void convert_24_to_24 (const void *src, void *dst, UINT src_stride,
UINT dst_stride, INT count, UINT freqAcc, UINT adj)
{
while (count > 0)
{
BYTE *dest24 = dst;
const BYTE *src24 = src;
dest24[0] = src24[0];
dest24[1] = src24[1];
dest24[2] = src24[2];
dst = (char *)dst + dst_stride;
src_advance(&src, src_stride, &count, &freqAcc, adj);
}
}
static void convert_24_to_32 (const void *src, void *dst, UINT src_stride,
UINT dst_stride, INT count, UINT freqAcc, UINT adj)
{
while (count > 0)
{
DWORD *dest32 = dst;
const BYTE *source = src;
*dest32 = le32(source[2] * 16777217 + source[1] * 65536 + source[0] * 256);
dst = (char *)dst + dst_stride;
src_advance(&src, src_stride, &count, &freqAcc, adj);
}
}
static void convert_32_to_8 (const void *src, void *dst, UINT src_stride,
UINT dst_stride, INT count, UINT freqAcc, UINT adj)
{
while (count > 0)
{
BYTE *dst8 = dst;
*dst8 = (le32(*(const DWORD *)src) / 16777216);
*dst8 -= 0x80;
dst = (char *)dst + dst_stride;
src_advance(&src, src_stride, &count, &freqAcc, adj);
}
}
static void convert_32_to_16 (const void *src, void *dst, UINT src_stride,
UINT dst_stride, INT count, UINT freqAcc, UINT adj)
{
while (count > 0)
{
WORD *dest16 = dst;
*dest16 = le16(le32(*(const DWORD *)src) / 65536);
dst = (char *)dst + dst_stride;
src_advance(&src, src_stride, &count, &freqAcc, adj);
}
}
static void convert_32_to_24 (const void *src, void *dst, UINT src_stride,
UINT dst_stride, INT count, UINT freqAcc, UINT adj)
{
while (count > 0)
{
DWORD dest = le32(*(const DWORD *)src);
BYTE *dest24 = dst;
dest24[0] = dest / 256;
dest24[1] = dest / 65536;
dest24[2] = dest / 16777216;
dst = (char *)dst + dst_stride;
src_advance(&src, src_stride, &count, &freqAcc, adj);
}
}
static void convert_32_to_32 (const void *src, void *dst, UINT src_stride,
UINT dst_stride, INT count, UINT freqAcc, UINT adj)
{
while (count > 0)
{
DWORD *dest = dst;
*dest = *(const DWORD *)src;
dst = (char *)dst + dst_stride;
src_advance(&src, src_stride, &count, &freqAcc, adj);
}
}
const bitsconvertfunc convertbpp[4][4] = {
{ convert_8_to_8, convert_8_to_16, convert_8_to_24, convert_8_to_32 },
{ convert_16_to_8, convert_16_to_16, convert_16_to_24, convert_16_to_32 },
{ convert_24_to_8, convert_24_to_16, convert_24_to_24, convert_24_to_32 },
{ convert_32_to_8, convert_32_to_16, convert_32_to_24, convert_32_to_32 },
};
static void mix8(signed char *src, INT *dst, unsigned len)
{
TRACE("%p - %p %d\n", src, dst, len);
while (len--)
/* 8-bit WAV is unsigned, it's here converted to signed, normalize function will convert it back again */
*(dst++) += (signed char)((BYTE)*(src++) - (BYTE)0x80);
}
static void mix16(SHORT *src, INT *dst, unsigned len)
{
TRACE("%p - %p %d\n", src, dst, len);
len /= 2;
while (len--)
{
*dst += le16(*src);
++dst; ++src;
}
}
static void mix24(BYTE *src, INT *dst, unsigned len)
{
TRACE("%p - %p %d\n", src, dst, len);
len /= 3;
while (len--)
{
DWORD field;
field = ((DWORD)src[2] << 16) + ((DWORD)src[1] << 8) + (DWORD)src[0];
if (src[2] & 0x80)
field |= 0xFF000000U;
*(dst++) += field;
++src;
}
}
static void mix32(INT *src, LONGLONG *dst, unsigned len)
{
TRACE("%p - %p %d\n", src, dst, len);
len /= 4;
while (len--)
*(dst++) += le32(*(src++));
}
const mixfunc mixfunctions[4] = {
(mixfunc)mix8,
(mixfunc)mix16,
(mixfunc)mix24,
(mixfunc)mix32
};
static void norm8(INT *src, signed char *dst, unsigned len)
{
TRACE("%p - %p %d\n", src, dst, len);
while (len--)
{
*dst = (*src) + 0x80;
if (*src < -0x80)
*dst = 0;
else if (*src > 0x7f)
*dst = 0xff;
++dst;
++src;
}
}
static void norm16(INT *src, SHORT *dst, unsigned len)
{
TRACE("%p - %p %d\n", src, dst, len);
len /= 2;
while (len--)
{
*dst = le16(*src);
if (*src <= -0x8000)
*dst = le16(0x8000);
else if (*src > 0x7fff)
*dst = le16(0x7fff);
++dst;
++src;
}
}
static void norm24(INT *src, BYTE *dst, unsigned len)
{
TRACE("%p - %p %d\n", src, dst, len);
len /= 3;
while (len--)
{
if (*src <= -0x800000)
{
dst[0] = 0;
dst[1] = 0;
dst[2] = 0x80;
}
else if (*src > 0x7fffff)
{
dst[0] = 0xff;
dst[1] = 0xff;
dst[2] = 0x7f;
}
else
{
dst[0] = *src;
dst[1] = *src >> 8;
dst[2] = *src >> 16;
}
++dst;
++src;
}
}
static void norm32(LONGLONG *src, INT *dst, unsigned len)
{
TRACE("%p - %p %d\n", src, dst, len);
len /= 4;
while (len--)
{
*dst = le32(*src);
if (*src <= -(LONGLONG)0x80000000)
*dst = le32(0x80000000);
else if (*src > 0x7fffffff)
*dst = le32(0x7fffffff);
++dst;
++src;
}
}
const normfunc normfunctions[4] = {
(normfunc)norm8,
(normfunc)norm16,
(normfunc)norm24,
(normfunc)norm32,
};
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