1 /* DirectSound format conversion and mixing routines
3 * Copyright 2007 Maarten Lankhorst
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
20 /* 8 bits is unsigned, the rest is signed.
21 * First I tried to reuse existing stuff from alsa-lib, after that
22 * didn't work, I gave up and just went for individual hacks.
24 * 24 bit is expensive to do, due to unaligned access.
25 * In dlls/winex11.drv/dib_convert.c convert_888_to_0888_asis there is a way
26 * around it, but I'm happy current code works, maybe something for later.
28 * The ^ 0x80 flips the signed bit, this is the conversion from
29 * signed (-128.. 0.. 127) to unsigned (0...255)
30 * This is only temporary: All 8 bit data should be converted to signed.
31 * then when fed to the sound card, it should be converted to unsigned again.
33 * Sound is LITTLE endian
40 #define NONAMELESSSTRUCT
41 #define NONAMELESSUNION
46 #include "wine/debug.h"
49 #include "dsound_private.h"
51 WINE_DEFAULT_DEBUG_CHANNEL(dsound);
53 #ifdef WORDS_BIGENDIAN
54 #define le16(x) RtlUshortByteSwap((x))
55 #define le32(x) RtlUlongByteSwap((x))
61 static inline void src_advance(const void **src, UINT stride, INT *count, UINT *freqAcc, UINT adj)
64 if (*freqAcc >= (1 << DSOUND_FREQSHIFT))
66 ULONG adv = (*freqAcc >> DSOUND_FREQSHIFT);
67 *freqAcc &= (1 << DSOUND_FREQSHIFT) - 1;
68 *(const char **)src += adv * stride;
73 static void convert_8_to_8 (const void *src, void *dst, UINT src_stride,
74 UINT dst_stride, INT count, UINT freqAcc, UINT adj)
78 *(BYTE *)dst = *(const BYTE *)src;
80 dst = (char *)dst + dst_stride;
81 src_advance(&src, src_stride, &count, &freqAcc, adj);
85 static void convert_8_to_16 (const void *src, void *dst, UINT src_stride,
86 UINT dst_stride, INT count, UINT freqAcc, UINT adj)
90 WORD dest = *(const BYTE *)src, *dest16 = dst;
91 *dest16 = le16(dest * 257 - 32768);
93 dst = (char *)dst + dst_stride;
94 src_advance(&src, src_stride, &count, &freqAcc, adj);
98 static void convert_8_to_24 (const void *src, void *dst, UINT src_stride,
99 UINT dst_stride, INT count, UINT freqAcc, UINT adj)
103 BYTE dest = *(const BYTE *)src;
107 dest24[2] = dest - 0x80;
109 dst = (char *)dst + dst_stride;
110 src_advance(&src, src_stride, &count, &freqAcc, adj);
114 static void convert_8_to_32 (const void *src, void *dst, UINT src_stride,
115 UINT dst_stride, INT count, UINT freqAcc, UINT adj)
119 DWORD dest = *(const BYTE *)src, *dest32 = dst;
120 *dest32 = le32(dest * 16843009 - 2147483648U);
122 dst = (char *)dst + dst_stride;
123 src_advance(&src, src_stride, &count, &freqAcc, adj);
127 static void convert_16_to_8 (const void *src, void *dst, UINT src_stride,
128 UINT dst_stride, INT count, UINT freqAcc, UINT adj)
133 *dst8 = (le16(*(const WORD *)src)) / 256;
136 dst = (char *)dst + dst_stride;
137 src_advance(&src, src_stride, &count, &freqAcc, adj);
141 static void convert_16_to_16 (const void *src, void *dst, UINT src_stride,
142 UINT dst_stride, INT count, UINT freqAcc, UINT adj)
146 *(WORD *)dst = *(const WORD *)src;
148 dst = (char *)dst + dst_stride;
149 src_advance(&src, src_stride, &count, &freqAcc, adj);
153 static void convert_16_to_24 (const void *src, void *dst, UINT src_stride,
154 UINT dst_stride, INT count, UINT freqAcc, UINT adj)
158 WORD dest = le16(*(const WORD *)src);
161 dest24[0] = dest / 256;
163 dest24[2] = dest / 256;
165 dst = (char *)dst + dst_stride;
166 src_advance(&src, src_stride, &count, &freqAcc, adj);
170 static void convert_16_to_32 (const void *src, void *dst, UINT src_stride,
171 UINT dst_stride, INT count, UINT freqAcc, UINT adj)
175 DWORD dest = *(const WORD *)src, *dest32 = dst;
176 *dest32 = dest * 65537;
178 dst = (char *)dst + dst_stride;
179 src_advance(&src, src_stride, &count, &freqAcc, adj);
183 static void convert_24_to_8 (const void *src, void *dst, UINT src_stride,
184 UINT dst_stride, INT count, UINT freqAcc, UINT adj)
189 *dst8 = ((const BYTE *)src)[2];
191 dst = (char *)dst + dst_stride;
192 src_advance(&src, src_stride, &count, &freqAcc, adj);
196 static void convert_24_to_16 (const void *src, void *dst, UINT src_stride,
197 UINT dst_stride, INT count, UINT freqAcc, UINT adj)
202 const BYTE *source = src;
203 *dest16 = le16(source[2] * 256 + source[1]);
205 dst = (char *)dst + dst_stride;
206 src_advance(&src, src_stride, &count, &freqAcc, adj);
210 static void convert_24_to_24 (const void *src, void *dst, UINT src_stride,
211 UINT dst_stride, INT count, UINT freqAcc, UINT adj)
216 const BYTE *src24 = src;
218 dest24[0] = src24[0];
219 dest24[1] = src24[1];
220 dest24[2] = src24[2];
222 dst = (char *)dst + dst_stride;
223 src_advance(&src, src_stride, &count, &freqAcc, adj);
227 static void convert_24_to_32 (const void *src, void *dst, UINT src_stride,
228 UINT dst_stride, INT count, UINT freqAcc, UINT adj)
233 const BYTE *source = src;
234 *dest32 = le32(source[2] * 16777217 + source[1] * 65536 + source[0] * 256);
236 dst = (char *)dst + dst_stride;
237 src_advance(&src, src_stride, &count, &freqAcc, adj);
241 static void convert_32_to_8 (const void *src, void *dst, UINT src_stride,
242 UINT dst_stride, INT count, UINT freqAcc, UINT adj)
247 *dst8 = (le32(*(const DWORD *)src) / 16777216);
250 dst = (char *)dst + dst_stride;
251 src_advance(&src, src_stride, &count, &freqAcc, adj);
255 static void convert_32_to_16 (const void *src, void *dst, UINT src_stride,
256 UINT dst_stride, INT count, UINT freqAcc, UINT adj)
261 *dest16 = le16(le32(*(const DWORD *)src) / 65536);
263 dst = (char *)dst + dst_stride;
264 src_advance(&src, src_stride, &count, &freqAcc, adj);
268 static void convert_32_to_24 (const void *src, void *dst, UINT src_stride,
269 UINT dst_stride, INT count, UINT freqAcc, UINT adj)
273 DWORD dest = le32(*(const DWORD *)src);
276 dest24[0] = dest / 256;
277 dest24[1] = dest / 65536;
278 dest24[2] = dest / 16777216;
280 dst = (char *)dst + dst_stride;
281 src_advance(&src, src_stride, &count, &freqAcc, adj);
285 static void convert_32_to_32 (const void *src, void *dst, UINT src_stride,
286 UINT dst_stride, INT count, UINT freqAcc, UINT adj)
291 *dest = *(const DWORD *)src;
293 dst = (char *)dst + dst_stride;
294 src_advance(&src, src_stride, &count, &freqAcc, adj);
298 const bitsconvertfunc convertbpp[4][4] = {
299 { convert_8_to_8, convert_8_to_16, convert_8_to_24, convert_8_to_32 },
300 { convert_16_to_8, convert_16_to_16, convert_16_to_24, convert_16_to_32 },
301 { convert_24_to_8, convert_24_to_16, convert_24_to_24, convert_24_to_32 },
302 { convert_32_to_8, convert_32_to_16, convert_32_to_24, convert_32_to_32 },
305 static void mix8(signed char *src, INT *dst, unsigned len)
307 TRACE("%p - %p %d\n", src, dst, len);
309 /* 8-bit WAV is unsigned, it's here converted to signed, normalize function will convert it back again */
310 *(dst++) += (signed char)((BYTE)*(src++) - (BYTE)0x80);
313 static void mix16(SHORT *src, INT *dst, unsigned len)
315 TRACE("%p - %p %d\n", src, dst, len);
324 static void mix24(BYTE *src, INT *dst, unsigned len)
326 TRACE("%p - %p %d\n", src, dst, len);
331 field = ((DWORD)src[2] << 16) + ((DWORD)src[1] << 8) + (DWORD)src[0];
333 field |= 0xFF000000U;
339 static void mix32(INT *src, LONGLONG *dst, unsigned len)
341 TRACE("%p - %p %d\n", src, dst, len);
344 *(dst++) += le32(*(src++));
347 const mixfunc mixfunctions[4] = {
354 static void norm8(INT *src, signed char *dst, unsigned len)
356 TRACE("%p - %p %d\n", src, dst, len);
359 *dst = (*src) + 0x80;
362 else if (*src > 0x7f)
369 static void norm16(INT *src, SHORT *dst, unsigned len)
371 TRACE("%p - %p %d\n", src, dst, len);
378 else if (*src > 0x7fff)
385 static void norm24(INT *src, BYTE *dst, unsigned len)
387 TRACE("%p - %p %d\n", src, dst, len);
391 if (*src <= -0x800000)
397 else if (*src > 0x7fffff)
414 static void norm32(LONGLONG *src, INT *dst, unsigned len)
416 TRACE("%p - %p %d\n", src, dst, len);
421 if (*src <= -(LONGLONG)0x80000000)
422 *dst = le32(0x80000000);
423 else if (*src > 0x7fffffff)
424 *dst = le32(0x7fffffff);
430 const normfunc normfunctions[4] = {