xref: /reactos/dll/win32/msacm32/pcmconverter.c (revision aad80191)
1 /* -*- tab-width: 8; c-basic-offset: 4 -*- */
2 
3 /*
4  *      MSACM32 library
5  *
6  *      Copyright 2000		Eric Pouech
7  *      Copyright 2004		Robert Reif
8  *
9  * This library is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * This library is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with this library; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
22  *
23  *	FIXME / TODO list
24  *	+ get rid of hack for PCM_DriverProc (msacm32.dll shouldn't export
25  *	  a DriverProc, but this would require implementing a generic
26  *	  embedded driver handling scheme in msacm32.dll which isn't done yet
27  */
28 
29 #include "config.h"
30 
31 #include <assert.h>
32 #include <stdarg.h>
33 #include <string.h>
34 
35 #include "windef.h"
36 #include "winbase.h"
37 #include "mmsystem.h"
38 #define NOBITMAP
39 #include "mmreg.h"
40 #include "msacm.h"
41 #include "wingdi.h"
42 #include "winnls.h"
43 #include "winuser.h"
44 
45 #include "msacmdrv.h"
46 #include "wineacm.h"
47 
48 #include "wine/debug.h"
49 
50 WINE_DEFAULT_DEBUG_CHANNEL(msacm);
51 
52 /***********************************************************************
53  *           PCM_drvOpen
54  */
55 static	DWORD	PCM_drvOpen(LPCSTR str, PACMDRVOPENDESCW adod)
56 {
57     TRACE("(%p, %p)\n", str, adod);
58 
59     return (adod == NULL) ||
60 	(adod->fccType == ACMDRIVERDETAILS_FCCTYPE_AUDIOCODEC &&
61 	 adod->fccComp == ACMDRIVERDETAILS_FCCCOMP_UNDEFINED);
62 }
63 
64 /***********************************************************************
65  *           PCM_drvClose
66  */
67 static	DWORD	PCM_drvClose(DWORD dwDevID)
68 {
69     TRACE("(%d)\n", dwDevID);
70 
71     return 1;
72 }
73 
74 #define	NUM_PCM_FORMATS	(sizeof(PCM_Formats) / sizeof(PCM_Formats[0]))
75 #define	NUM_OF(a,b)	((a)/(b))
76 
77 /* flags for fdwDriver */
78 #define PCM_RESAMPLE	1
79 
80 typedef void (*PCM_CONVERT_KEEP_RATE)(const unsigned char*, int, unsigned char*);
81 
82 typedef void (*PCM_CONVERT_CHANGE_RATE)(const DWORD, const unsigned char*, DWORD*, const DWORD, unsigned char*, DWORD*);
83 
84 /* data used while converting */
85 typedef struct tagAcmPcmData {
86     /* conversion routine, depending if rate conversion is required */
87     union {
88         PCM_CONVERT_KEEP_RATE cvtKeepRate;
89         PCM_CONVERT_CHANGE_RATE cvtChangeRate;
90     } cvt;
91 } AcmPcmData;
92 
93 /* table to list all supported formats... those are the basic ones. this
94  * also helps given a unique index to each of the supported formats
95  */
96 static const struct {
97     int		nChannels;
98     int		nBits;
99     int		rate;
100 } PCM_Formats[] = {
101     {1,  8,  8000}, {2,  8,  8000}, {1, 16,  8000}, {2, 16,  8000}, {1, 24,  8000}, {2, 24,  8000},
102     {1,  8, 11025}, {2,  8, 11025}, {1, 16, 11025}, {2, 16, 11025}, {1, 24, 11025}, {2, 24, 11025},
103     {1,  8, 22050}, {2,  8, 22050}, {1, 16, 22050}, {2, 16, 22050}, {1, 24, 22050}, {2, 24, 22050},
104     {1,  8, 44100}, {2,  8, 44100}, {1, 16, 44100}, {2, 16, 44100}, {1, 24, 44100}, {2, 24, 44100},
105     {1,  8, 48000}, {2,  8, 48000}, {1, 16, 48000}, {2, 16, 48000}, {1, 24, 48000}, {2, 24, 48000},
106     {1,  8, 96000}, {2,  8, 96000}, {1, 16, 96000}, {2, 16, 96000}, {1, 24, 96000}, {2, 24, 96000},
107 };
108 
109 /***********************************************************************
110  *           PCM_GetFormatIndex
111  */
112 static DWORD PCM_GetFormatIndex(LPWAVEFORMATEX wfx)
113 {
114     unsigned int i;
115     TRACE("(%p)\n", wfx);
116 
117     for (i = 0; i < NUM_PCM_FORMATS; i++) {
118 	if (wfx->nChannels == PCM_Formats[i].nChannels &&
119 	    wfx->nSamplesPerSec == PCM_Formats[i].rate &&
120 	    wfx->wBitsPerSample == PCM_Formats[i].nBits)
121 	    return i;
122     }
123     return 0xFFFFFFFF;
124 }
125 
126 /* PCM Conversions:
127  *
128  * parameters:
129  *	+ 8 bit unsigned vs 16 bit signed
130  *	+ mono vs stereo (1 or 2 channels)
131  *	+ sampling rate (8.0, 11.025, 22.05, 44.1 kHz are defined, but algo
132  *	  shall work in all cases)
133  *
134  * mono => stereo: copy the same sample on Left & Right channels
135  * stereo => mono: use the sum of Left & Right channels
136  */
137 
138 /***********************************************************************
139  *           C816
140  *
141  * Converts a 8 bit sample to a 16 bit one
142  */
143 static inline short C816(unsigned char b)
144 {
145     return (b - 128) << 8;
146 }
147 
148 /***********************************************************************
149  *           C168
150  *
151  * Converts a 16 bit sample to a 8 bit one (data loss !!)
152  */
153 static inline unsigned char C168(short s)
154 {
155     return HIBYTE(s) ^ (unsigned char)0x80;
156 }
157 
158 /***********************************************************************
159  *           C248
160  *
161  * Converts a 24 bit sample to a 8 bit one (data loss !!)
162  */
163 static inline unsigned char C248(int s)
164 {
165     return HIBYTE(HIWORD(s)) ^ (unsigned char)0x80;
166 }
167 
168 /***********************************************************************
169  *           C2416
170  *
171  * Converts a 24 bit sample to a 16 bit one (data loss !!)
172  */
173 static inline short C2416(int s)
174 {
175     return HIWORD(s);
176 }
177 
178 /***********************************************************************
179  *           R16
180  *
181  * Read a 16 bit sample (correctly handles endianness)
182  */
183 static inline short  R16(const unsigned char* src)
184 {
185     return (short)((unsigned short)src[0] | ((unsigned short)src[1] << 8));
186 }
187 
188 /***********************************************************************
189  *           R24
190  *
191  * Read a 24 bit sample (correctly handles endianness)
192  * Note, to support signed arithmetic, the values are shifted high in the int
193  * and low 8 bytes are unused.
194  */
195 static inline int R24(const unsigned char* src)
196 {
197     return ((int)src[0] | (int)src[1] << 8 | (int)src[2] << 16) << 8;
198 }
199 
200 /***********************************************************************
201  *           W16
202  *
203  * Write a 16 bit sample (correctly handles endianness)
204  */
205 static inline void  W16(unsigned char* dst, short s)
206 {
207     dst[0] = LOBYTE(s);
208     dst[1] = HIBYTE(s);
209 }
210 
211 /***********************************************************************
212  *           W24
213  *
214  * Write a 24 bit sample (correctly handles endianness)
215  */
216 static inline void  W24(unsigned char* dst, int s)
217 {
218     dst[0] = HIBYTE(LOWORD(s));
219     dst[1] = LOBYTE(HIWORD(s));
220     dst[2] = HIBYTE(HIWORD(s));
221 }
222 
223 /***********************************************************************
224  *           M24
225  *
226  * Convert the (l,r) 24 bit stereo sample into a 24 bit mono
227  * (takes the sum of the two values)
228  */
229 static inline int M24(int l, int r)
230 {
231     LONGLONG sum = l + r;
232 
233     /* clip sum to saturation */
234     if (sum > 0x7fffff00)
235         sum = 0x7fffff00;
236     else if (sum < -0x7fffff00)
237         sum = -0x7fffff00;
238 
239     return sum;
240 }
241 
242 /***********************************************************************
243  *           M16
244  *
245  * Convert the (l,r) 16 bit stereo sample into a 16 bit mono
246  * (takes the sum of the two values)
247  */
248 static inline short M16(short l, short r)
249 {
250     int	sum = l + r;
251 
252     /* clip sum to saturation */
253     if (sum > 32767)
254         sum = 32767;
255     else if (sum < -32768)
256         sum = -32768;
257 
258     return sum;
259 }
260 
261 /***********************************************************************
262  *           M8
263  *
264  * Convert the (l,r) 8 bit stereo sample into a 8 bit mono
265  * (takes the sum of the two values)
266  */
267 static inline unsigned char M8(unsigned char a, unsigned char b)
268 {
269     int l = a - 128;
270     int r = b - 128;
271     int	sum = (l + r) + 128;
272 
273     /* clip sum to saturation */
274     if (sum > 0xff)
275         sum = 0xff;
276     else if (sum < 0)
277         sum = 0;
278 
279     return sum;
280 }
281 
282 /* the conversion routines without rate conversion are labelled cvt<X><Y><N><M>K
283  * where :
284  * <X> is the (M)ono/(S)tereo configuration of  input channel
285  * <Y> is the (M)ono/(S)tereo configuration of output channel
286  * <N> is the number of bits of  input channel (8 or 16)
287  * <M> is the number of bits of output channel (8 or 16)
288  *
289  * in the parameters, ns is always the number of samples, so the size of input
290  * buffer (resp output buffer) is ns * (<X> == 'Mono' ? 1:2) * (<N> == 8 ? 1:2)
291  */
292 
293 static	void cvtMM88K(const unsigned char* src, int ns, unsigned char* dst)
294 {
295     TRACE("(%p, %d, %p)\n", src, ns, dst);
296     memcpy(dst, src, ns);
297 }
298 
299 static	void cvtSS88K(const unsigned char* src, int ns, unsigned char* dst)
300 {
301     TRACE("(%p, %d, %p)\n", src, ns, dst);
302     memcpy(dst, src, ns * 2);
303 }
304 
305 static	void cvtMM1616K(const unsigned char* src, int ns, unsigned char* dst)
306 {
307     TRACE("(%p, %d, %p)\n", src, ns, dst);
308     memcpy(dst, src, ns * 2);
309 }
310 
311 static	void cvtSS1616K(const unsigned char* src, int ns, unsigned char* dst)
312 {
313     TRACE("(%p, %d, %p)\n", src, ns, dst);
314     memcpy(dst, src, ns * 4);
315 }
316 
317 static	void cvtMS88K(const unsigned char* src, int ns, unsigned char* dst)
318 {
319     TRACE("(%p, %d, %p)\n", src, ns, dst);
320 
321     while (ns--) {
322 	*dst++ = *src;
323 	*dst++ = *src++;
324     }
325 }
326 
327 static	void cvtMS816K(const unsigned char* src, int ns, unsigned char* dst)
328 {
329     short	v;
330     TRACE("(%p, %d, %p)\n", src, ns, dst);
331 
332     while (ns--) {
333 	v = C816(*src++);
334 	W16(dst, v);		dst += 2;
335 	W16(dst, v);		dst += 2;
336     }
337 }
338 
339 static	void cvtMS168K(const unsigned char* src, int ns, unsigned char* dst)
340 {
341     unsigned char v;
342     TRACE("(%p, %d, %p)\n", src, ns, dst);
343 
344     while (ns--) {
345 	v = C168(R16(src));	src += 2;
346 	*dst++ = v;
347 	*dst++ = v;
348     }
349 }
350 
351 static	void cvtMS1616K(const unsigned char* src, int ns, unsigned char* dst)
352 {
353     short	v;
354     TRACE("(%p, %d, %p)\n", src, ns, dst);
355 
356     while (ns--) {
357 	v = R16(src);		src += 2;
358 	W16(dst, v);		dst += 2;
359 	W16(dst, v);		dst += 2;
360     }
361 }
362 
363 static	void cvtSM88K(const unsigned char* src, int ns, unsigned char* dst)
364 {
365     TRACE("(%p, %d, %p)\n", src, ns, dst);
366 
367     while (ns--) {
368 	*dst++ = M8(src[0], src[1]);
369 	src += 2;
370     }
371 }
372 
373 static	void cvtSM816K(const unsigned char* src, int ns, unsigned char* dst)
374 {
375     short	v;
376     TRACE("(%p, %d, %p)\n", src, ns, dst);
377 
378     while (ns--) {
379 	v = M16(C816(src[0]), C816(src[1]));
380 	src += 2;
381 	W16(dst, v);		dst += 2;
382     }
383 }
384 
385 static	void cvtSM168K(const unsigned char* src, int ns, unsigned char* dst)
386 {
387     TRACE("(%p, %d, %p)\n", src, ns, dst);
388 
389     while (ns--) {
390 	*dst++ = C168(M16(R16(src), R16(src + 2)));
391 	src += 4;
392     }
393 }
394 
395 static	void cvtSM1616K(const unsigned char* src, int ns, unsigned char* dst)
396 {
397     TRACE("(%p, %d, %p)\n", src, ns, dst);
398 
399     while (ns--) {
400 	W16(dst, M16(R16(src),R16(src+2)));	dst += 2;
401 	src += 4;
402     }
403 }
404 
405 static	void cvtMM816K(const unsigned char* src, int ns, unsigned char* dst)
406 {
407     TRACE("(%p, %d, %p)\n", src, ns, dst);
408 
409     while (ns--) {
410 	W16(dst, C816(*src++));		dst += 2;
411     }
412 }
413 
414 static	void cvtSS816K(const unsigned char* src, int ns, unsigned char* dst)
415 {
416     TRACE("(%p, %d, %p)\n", src, ns, dst);
417 
418     while (ns--) {
419 	W16(dst, C816(*src++));	dst += 2;
420 	W16(dst, C816(*src++));	dst += 2;
421     }
422 }
423 
424 static	void cvtMM168K(const unsigned char* src, int ns, unsigned char* dst)
425 {
426     TRACE("(%p, %d, %p)\n", src, ns, dst);
427 
428     while (ns--) {
429 	*dst++ = C168(R16(src));	src += 2;
430     }
431 }
432 
433 static	void cvtSS168K(const unsigned char* src, int ns, unsigned char* dst)
434 {
435     TRACE("(%p, %d, %p)\n", src, ns, dst);
436 
437     while (ns--) {
438 	*dst++ = C168(R16(src));	src += 2;
439 	*dst++ = C168(R16(src));	src += 2;
440     }
441 }
442 
443 static	void cvtMS248K(const unsigned char* src, int ns, unsigned char* dst)
444 {
445     unsigned char v;
446     TRACE("(%p, %d, %p)\n", src, ns, dst);
447 
448     while (ns--) {
449 	v = C248(R24(src));	src += 3;
450 	*dst++ = v;
451 	*dst++ = v;
452     }
453 }
454 
455 static	void cvtSM248K(const unsigned char* src, int ns, unsigned char* dst)
456 {
457     TRACE("(%p, %d, %p)\n", src, ns, dst);
458 
459     while (ns--) {
460 	*dst++ = C248(M24(R24(src), R24(src + 3)));
461 	src += 6;
462     }
463 }
464 
465 static	void cvtMM248K(const unsigned char* src, int ns, unsigned char* dst)
466 {
467     TRACE("(%p, %d, %p)\n", src, ns, dst);
468 
469     while (ns--) {
470 	*dst++ = C248(R24(src));	src += 3;
471     }
472 }
473 
474 static	void cvtSS248K(const unsigned char* src, int ns, unsigned char* dst)
475 {
476     TRACE("(%p, %d, %p)\n", src, ns, dst);
477 
478     while (ns--) {
479 	*dst++ = C248(R24(src));	src += 3;
480 	*dst++ = C248(R24(src));	src += 3;
481     }
482 }
483 
484 static	void cvtMS2416K(const unsigned char* src, int ns, unsigned char* dst)
485 {
486     short v;
487     TRACE("(%p, %d, %p)\n", src, ns, dst);
488 
489     while (ns--) {
490 	v = C2416(R24(src));	src += 3;
491 	W16(dst, v);	dst += 2;
492 	W16(dst, v);	dst += 2;
493     }
494 }
495 
496 static	void cvtSM2416K(const unsigned char* src, int ns, unsigned char* dst)
497 {
498     TRACE("(%p, %d, %p)\n", src, ns, dst);
499 
500     while (ns--) {
501 	W16(dst, C2416(M24(R24(src), R24(src + 3))));
502 	dst += 2;
503 	src += 6;
504     }
505 }
506 
507 static	void cvtMM2416K(const unsigned char* src, int ns, unsigned char* dst)
508 {
509     TRACE("(%p, %d, %p)\n", src, ns, dst);
510 
511     while (ns--) {
512 	W16(dst, C2416(R24(src)));	dst += 2; src += 3;
513     }
514 }
515 
516 static	void cvtSS2416K(const unsigned char* src, int ns, unsigned char* dst)
517 {
518     TRACE("(%p, %d, %p)\n", src, ns, dst);
519 
520     while (ns--) {
521 	W16(dst, C2416(R24(src)));	dst += 2; src += 3;
522 	W16(dst, C2416(R24(src)));	dst += 2; src += 3;
523     }
524 }
525 
526 
527 static const PCM_CONVERT_KEEP_RATE PCM_ConvertKeepRate[] = {
528     cvtSS88K,	cvtSM88K,   cvtMS88K,   cvtMM88K,
529     cvtSS816K,	cvtSM816K,  cvtMS816K,  cvtMM816K,
530     NULL, NULL, NULL, NULL, /* TODO: 8->24 */
531     cvtSS168K,	cvtSM168K,  cvtMS168K,  cvtMM168K,
532     cvtSS1616K, cvtSM1616K, cvtMS1616K, cvtMM1616K,
533     NULL, NULL, NULL, NULL, /* TODO: 16->24 */
534     cvtSS248K, cvtSM248K, cvtMS248K, cvtMM248K,
535     cvtSS2416K, cvtSM2416K, cvtMS2416K, cvtMM2416K,
536     NULL, NULL, NULL, NULL, /* TODO: 24->24 */
537 };
538 
539 /* the conversion routines with rate conversion are labelled cvt<X><Y><N><M>C
540  * where :
541  * <X> is the (M)ono/(S)tereo configuration of  input channel
542  * <Y> is the (M)ono/(S)tereo configuration of output channel
543  * <N> is the number of bits of  input channel (8 or 16)
544  * <M> is the number of bits of output channel (8 or 16)
545  *
546  */
547 
548 static void cvtSS88C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
549                      const DWORD dstRate, unsigned char *dst, DWORD *ndst)
550 {
551     DWORD error = srcRate / 2;
552     DWORD maxSrc = *nsrc, maxDst = *ndst;
553     *ndst = 0;
554     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
555         error += dstRate;
556         while (error > srcRate) {
557             if (*ndst == maxDst)
558                 return;
559             (*ndst)++;
560             error -= srcRate;
561 
562             *dst++ = src[0];
563             *dst++ = src[1];
564         }
565         src += 2;
566     }
567 }
568 
569 static void cvtSM88C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
570                      const DWORD dstRate, unsigned char *dst, DWORD *ndst)
571 {
572     DWORD error = srcRate / 2;
573     DWORD maxSrc = *nsrc, maxDst = *ndst;
574     *ndst = 0;
575     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
576         error += dstRate;
577         while (error > srcRate) {
578             if (*ndst == maxDst)
579                 return;
580             (*ndst)++;
581             error -= srcRate;
582 
583             *dst++ = M8(src[0], src[1]);
584         }
585         src += 2;
586     }
587 }
588 
589 static void cvtMS88C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
590                      const DWORD dstRate, unsigned char *dst, DWORD *ndst)
591 {
592     DWORD error = srcRate / 2;
593     DWORD maxSrc = *nsrc, maxDst = *ndst;
594     *ndst = 0;
595     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
596         error += dstRate;
597         while (error > srcRate) {
598             if (*ndst == maxDst)
599                 return;
600             (*ndst)++;
601             error -= srcRate;
602 
603             *dst++ = src[0];
604             *dst++ = src[0];
605         }
606         src += 1;
607     }
608 }
609 
610 static void cvtMM88C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
611                      const DWORD dstRate, unsigned char *dst, DWORD *ndst)
612 {
613     DWORD error = srcRate / 2;
614     DWORD maxSrc = *nsrc, maxDst = *ndst;
615     *ndst = 0;
616     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
617         error += dstRate;
618         while (error > srcRate) {
619             if (*ndst == maxDst)
620                 return;
621             (*ndst)++;
622             error -= srcRate;
623 
624             *dst++ = src[0];
625         }
626         src += 1;
627     }
628 }
629 
630 static void cvtSS816C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
631                       const DWORD dstRate, unsigned char *dst, DWORD *ndst)
632 {
633     DWORD error = srcRate / 2;
634     DWORD maxSrc = *nsrc, maxDst = *ndst;
635     *ndst = 0;
636     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
637         error += dstRate;
638         while (error > srcRate) {
639             if (*ndst == maxDst)
640                 return;
641             (*ndst)++;
642             error -= srcRate;
643 
644             W16(dst, C816(src[0])); dst += 2;
645             W16(dst, C816(src[1])); dst += 2;
646         }
647         src += 2;
648     }
649 }
650 
651 static void cvtSM816C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
652                       const DWORD dstRate, unsigned char *dst, DWORD *ndst)
653 {
654     DWORD error = srcRate / 2;
655     DWORD maxSrc = *nsrc, maxDst = *ndst;
656     *ndst = 0;
657     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
658         error += dstRate;
659         while (error > srcRate) {
660             if (*ndst == maxDst)
661                 return;
662             (*ndst)++;
663             error -= srcRate;
664 
665             W16(dst, M16(C816(src[0]), C816(src[1]))); dst += 2;
666         }
667         src += 2;
668     }
669 }
670 
671 static void cvtMS816C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
672                       const DWORD dstRate, unsigned char *dst, DWORD *ndst)
673 {
674     DWORD error = srcRate / 2;
675     DWORD maxSrc = *nsrc, maxDst = *ndst;
676     *ndst = 0;
677     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
678         error += dstRate;
679         while (error > srcRate) {
680             if (*ndst == maxDst)
681                 return;
682             (*ndst)++;
683             error -= srcRate;
684 
685             W16(dst, C816(src[0])); dst += 2;
686             W16(dst, C816(src[0])); dst += 2;
687         }
688         src += 1;
689     }
690 }
691 
692 static void cvtMM816C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
693                       const DWORD dstRate, unsigned char *dst, DWORD *ndst)
694 {
695     DWORD error = srcRate / 2;
696     DWORD maxSrc = *nsrc, maxDst = *ndst;
697     *ndst = 0;
698     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
699         error += dstRate;
700         while (error > srcRate) {
701             if (*ndst == maxDst)
702                 return;
703             (*ndst)++;
704             error -= srcRate;
705 
706             W16(dst, C816(src[0])); dst += 2;
707         }
708         src += 1;
709     }
710 }
711 
712 static void cvtSS168C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
713                       const DWORD dstRate, unsigned char *dst, DWORD *ndst)
714 {
715     DWORD error = srcRate / 2;
716     DWORD maxSrc = *nsrc, maxDst = *ndst;
717     *ndst = 0;
718     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
719         error += dstRate;
720         while (error > srcRate) {
721             if (*ndst == maxDst)
722                 return;
723             (*ndst)++;
724             error -= srcRate;
725 
726             *dst++ = C168(R16(src));
727             *dst++ = C168(R16(src + 2));
728         }
729         src += 4;
730     }
731 }
732 
733 static void cvtSM168C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
734                       const DWORD dstRate, unsigned char *dst, DWORD *ndst)
735 {
736     DWORD error = srcRate / 2;
737     DWORD maxSrc = *nsrc, maxDst = *ndst;
738     *ndst = 0;
739     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
740         error += dstRate;
741         while (error > srcRate) {
742             if (*ndst == maxDst)
743                 return;
744             (*ndst)++;
745             error -= srcRate;
746 
747             *dst++ = C168(M16(R16(src), R16(src + 2)));
748         }
749         src += 4;
750     }
751 }
752 
753 static void cvtMS168C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
754                       const DWORD dstRate, unsigned char *dst, DWORD *ndst)
755 {
756     DWORD error = srcRate / 2;
757     DWORD maxSrc = *nsrc, maxDst = *ndst;
758     *ndst = 0;
759     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
760         error += dstRate;
761         while (error > srcRate) {
762             if (*ndst == maxDst)
763                 return;
764             (*ndst)++;
765             error -= srcRate;
766 
767             *dst++ = C168(R16(src));
768             *dst++ = C168(R16(src));
769         }
770         src += 2;
771     }
772 }
773 
774 static void cvtMM168C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
775                       const DWORD dstRate, unsigned char *dst, DWORD *ndst)
776 {
777     DWORD error = srcRate / 2;
778     DWORD maxSrc = *nsrc, maxDst = *ndst;
779     *ndst = 0;
780     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
781         error += dstRate;
782         while (error > srcRate) {
783             if (*ndst == maxDst)
784                 return;
785             (*ndst)++;
786             error -= srcRate;
787 
788             *dst++ = C168(R16(src));
789         }
790         src += 2;
791     }
792 }
793 
794 static void cvtSS1616C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
795                        const DWORD dstRate, unsigned char *dst, DWORD *ndst)
796 {
797     DWORD error = srcRate / 2;
798     DWORD maxSrc = *nsrc, maxDst = *ndst;
799     *ndst = 0;
800     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
801         error += dstRate;
802         while (error > srcRate) {
803             if (*ndst == maxDst)
804                 return;
805             (*ndst)++;
806             error -= srcRate;
807 
808             W16(dst, R16(src)); dst += 2;
809             W16(dst, R16(src + 2)); dst += 2;
810         }
811         src += 4;
812     }
813 }
814 
815 static void cvtSM1616C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
816                        const DWORD dstRate, unsigned char *dst, DWORD *ndst)
817 {
818     DWORD error = srcRate / 2;
819     DWORD maxSrc = *nsrc, maxDst = *ndst;
820     *ndst = 0;
821     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
822         error += dstRate;
823         while (error > srcRate) {
824             if (*ndst == maxDst)
825                 return;
826             (*ndst)++;
827             error -= srcRate;
828 
829             W16(dst, M16(R16(src), R16(src + 2))); dst += 2;
830         }
831         src += 4;
832     }
833 }
834 
835 static void cvtMS1616C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
836                        const DWORD dstRate, unsigned char *dst, DWORD *ndst)
837 {
838     DWORD error = srcRate / 2;
839     DWORD maxSrc = *nsrc, maxDst = *ndst;
840     *ndst = 0;
841     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
842         error += dstRate;
843         while (error > srcRate) {
844             if (*ndst == maxDst)
845                 return;
846             (*ndst)++;
847             error -= srcRate;
848 
849             W16(dst, R16(src)); dst += 2;
850             W16(dst, R16(src)); dst += 2;
851         }
852         src += 2;
853     }
854 }
855 
856 static void cvtMM1616C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
857                        const DWORD dstRate, unsigned char *dst, DWORD *ndst)
858 {
859     DWORD error = srcRate / 2;
860     DWORD maxSrc = *nsrc, maxDst = *ndst;
861     *ndst = 0;
862     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
863         error += dstRate;
864         while (error > srcRate) {
865             if (*ndst == maxDst)
866                 return;
867             (*ndst)++;
868             error -= srcRate;
869 
870             W16(dst, R16(src)); dst += 2;
871         }
872         src += 2;
873     }
874 }
875 
876 static void cvtSS2424C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
877                        const DWORD dstRate, unsigned char *dst, DWORD *ndst)
878 {
879     DWORD error = srcRate / 2;
880     DWORD maxSrc = *nsrc, maxDst = *ndst;
881     *ndst = 0;
882     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
883         error += dstRate;
884         while (error > srcRate) {
885             if (*ndst == maxDst)
886                 return;
887             (*ndst)++;
888             error -= srcRate;
889 
890             W24(dst, R24(src)); dst += 3;
891             W24(dst, R24(src + 3)); dst += 3;
892         }
893         src += 6;
894     }
895 }
896 
897 static void cvtSM2424C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
898                        const DWORD dstRate, unsigned char *dst, DWORD *ndst)
899 {
900     DWORD error = srcRate / 2;
901     DWORD maxSrc = *nsrc, maxDst = *ndst;
902     *ndst = 0;
903     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
904         error += dstRate;
905         while (error > srcRate) {
906             if (*ndst == maxDst)
907                 return;
908             (*ndst)++;
909             error -= srcRate;
910 
911             W24(dst, M24(R24(src), R24(src + 3))); dst += 3;
912         }
913         src += 6;
914     }
915 }
916 
917 static void cvtMS2424C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
918                        const DWORD dstRate, unsigned char *dst, DWORD *ndst)
919 {
920     DWORD error = srcRate / 2;
921     DWORD maxSrc = *nsrc, maxDst = *ndst;
922     *ndst = 0;
923     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
924         error += dstRate;
925         while (error > srcRate) {
926             if (*ndst == maxDst)
927                 return;
928             (*ndst)++;
929             error -= srcRate;
930 
931             W24(dst, R24(src)); dst += 3;
932             W24(dst, R24(src)); dst += 3;
933         }
934         src += 3;
935     }
936 }
937 
938 static void cvtMM2424C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
939                        const DWORD dstRate, unsigned char *dst, DWORD *ndst)
940 {
941     DWORD error = srcRate / 2;
942     DWORD maxSrc = *nsrc, maxDst = *ndst;
943     *ndst = 0;
944     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
945         error += dstRate;
946         while (error > srcRate) {
947             if (*ndst == maxDst)
948                 return;
949             (*ndst)++;
950             error -= srcRate;
951 
952             W24(dst, R24(src)); dst += 3;
953         }
954         src += 3;
955     }
956 }
957 
958 static const PCM_CONVERT_CHANGE_RATE PCM_ConvertChangeRate[] = {
959     cvtSS88C,   cvtSM88C,   cvtMS88C,   cvtMM88C,
960     cvtSS816C,	cvtSM816C,  cvtMS816C,  cvtMM816C,
961     NULL, NULL, NULL, NULL, /* TODO: 8->24 */
962     cvtSS168C,	cvtSM168C,  cvtMS168C,  cvtMM168C,
963     cvtSS1616C, cvtSM1616C, cvtMS1616C, cvtMM1616C,
964     NULL, NULL, NULL, NULL, /* TODO: 16->24 */
965     NULL, NULL, NULL, NULL, /* TODO: 24->8 */
966     NULL, NULL, NULL, NULL, /* TODO: 24->16 */
967     cvtSS2424C, cvtSM2424C, cvtMS2424C, cvtMM2424C,
968 };
969 
970 /***********************************************************************
971  *           PCM_DriverDetails
972  *
973  */
974 static	LRESULT PCM_DriverDetails(PACMDRIVERDETAILSW add)
975 {
976     TRACE("(%p)\n", add);
977 
978     add->fccType = ACMDRIVERDETAILS_FCCTYPE_AUDIOCODEC;
979     add->fccComp = ACMDRIVERDETAILS_FCCCOMP_UNDEFINED;
980     add->wMid = MM_MICROSOFT;
981     add->wPid = MM_MSFT_ACM_PCM;
982     add->vdwACM = 0x01000000;
983     add->vdwDriver = 0x01000000;
984     add->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CONVERTER;
985     add->cFormatTags = 1;
986     add->cFilterTags = 0;
987     add->hicon = NULL;
988     MultiByteToWideChar( CP_ACP, 0, "MS-PCM", -1,
989                          add->szShortName, sizeof(add->szShortName)/sizeof(WCHAR) );
990     MultiByteToWideChar( CP_ACP, 0, "Wine PCM converter", -1,
991                          add->szLongName, sizeof(add->szLongName)/sizeof(WCHAR) );
992     MultiByteToWideChar( CP_ACP, 0, "Brought to you by the Wine team...", -1,
993                          add->szCopyright, sizeof(add->szCopyright)/sizeof(WCHAR) );
994     MultiByteToWideChar( CP_ACP, 0, "Refer to LICENSE file", -1,
995                          add->szLicensing, sizeof(add->szLicensing)/sizeof(WCHAR) );
996     add->szFeatures[0] = 0;
997 
998     return MMSYSERR_NOERROR;
999 }
1000 
1001 /***********************************************************************
1002  *           PCM_FormatTagDetails
1003  *
1004  */
1005 static	LRESULT	PCM_FormatTagDetails(PACMFORMATTAGDETAILSW aftd, DWORD dwQuery)
1006 {
1007     TRACE("(%p, %08x)\n", aftd, dwQuery);
1008 
1009     switch (dwQuery) {
1010     case ACM_FORMATTAGDETAILSF_INDEX:
1011 	if (aftd->dwFormatTagIndex != 0) {
1012             WARN("not possible\n");
1013             return ACMERR_NOTPOSSIBLE;
1014         }
1015 	break;
1016     case ACM_FORMATTAGDETAILSF_FORMATTAG:
1017 	if (aftd->dwFormatTag != WAVE_FORMAT_PCM) {
1018             WARN("not possible\n");
1019             return ACMERR_NOTPOSSIBLE;
1020         }
1021 	break;
1022     case ACM_FORMATTAGDETAILSF_LARGESTSIZE:
1023 	if (aftd->dwFormatTag != WAVE_FORMAT_UNKNOWN &&
1024 	    aftd->dwFormatTag != WAVE_FORMAT_PCM) {
1025             WARN("not possible\n");
1026 	    return ACMERR_NOTPOSSIBLE;
1027         }
1028 	break;
1029     default:
1030 	WARN("Unsupported query %08x\n", dwQuery);
1031 	return MMSYSERR_NOTSUPPORTED;
1032     }
1033 
1034     aftd->dwFormatTagIndex = 0;
1035     aftd->dwFormatTag = WAVE_FORMAT_PCM;
1036     aftd->cbFormatSize = sizeof(PCMWAVEFORMAT);
1037     aftd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CONVERTER;
1038     aftd->cStandardFormats = NUM_PCM_FORMATS;
1039     aftd->szFormatTag[0] = 0;
1040 
1041     return MMSYSERR_NOERROR;
1042 }
1043 
1044 /***********************************************************************
1045  *           PCM_FormatDetails
1046  *
1047  */
1048 static	LRESULT	PCM_FormatDetails(PACMFORMATDETAILSW afd, DWORD dwQuery)
1049 {
1050     TRACE("(%p, %08x)\n", afd, dwQuery);
1051 
1052     switch (dwQuery) {
1053     case ACM_FORMATDETAILSF_FORMAT:
1054 	if (PCM_GetFormatIndex(afd->pwfx) == 0xFFFFFFFF) {
1055             WARN("not possible\n");
1056             return ACMERR_NOTPOSSIBLE;
1057         }
1058 	break;
1059     case ACM_FORMATDETAILSF_INDEX:
1060 	assert(afd->dwFormatIndex < NUM_PCM_FORMATS);
1061 	afd->pwfx->wFormatTag = WAVE_FORMAT_PCM;
1062 	afd->pwfx->nChannels = PCM_Formats[afd->dwFormatIndex].nChannels;
1063 	afd->pwfx->nSamplesPerSec = PCM_Formats[afd->dwFormatIndex].rate;
1064 	afd->pwfx->wBitsPerSample = PCM_Formats[afd->dwFormatIndex].nBits;
1065 	/* native MSACM uses a PCMWAVEFORMAT structure, so cbSize is not
1066 	 * accessible afd->pwfx->cbSize = 0;
1067 	 */
1068 	afd->pwfx->nBlockAlign =
1069 	    (afd->pwfx->nChannels * afd->pwfx->wBitsPerSample) / 8;
1070 	afd->pwfx->nAvgBytesPerSec =
1071 	    afd->pwfx->nSamplesPerSec * afd->pwfx->nBlockAlign;
1072 	break;
1073     default:
1074 	WARN("Unsupported query %08x\n", dwQuery);
1075 	return MMSYSERR_NOTSUPPORTED;
1076     }
1077 
1078     afd->dwFormatTag = WAVE_FORMAT_PCM;
1079     afd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CONVERTER;
1080     afd->szFormat[0] = 0; /* let MSACM format this for us... */
1081     afd->cbwfx = sizeof(PCMWAVEFORMAT);
1082 
1083     return MMSYSERR_NOERROR;
1084 }
1085 
1086 /***********************************************************************
1087  *           PCM_FormatSuggest
1088  *
1089  */
1090 static	LRESULT	PCM_FormatSuggest(PACMDRVFORMATSUGGEST adfs)
1091 {
1092     TRACE("(%p)\n", adfs);
1093 
1094     /* some tests ... */
1095     if (adfs->cbwfxSrc < sizeof(PCMWAVEFORMAT) ||
1096         adfs->cbwfxDst < sizeof(PCMWAVEFORMAT) ||
1097         PCM_GetFormatIndex(adfs->pwfxSrc) == 0xFFFFFFFF) {
1098             WARN("not possible\n");
1099             return ACMERR_NOTPOSSIBLE;
1100     }
1101 
1102     /* is no suggestion for destination, then copy source value */
1103     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NCHANNELS)) {
1104         adfs->pwfxDst->nChannels = adfs->pwfxSrc->nChannels;
1105     }
1106     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NSAMPLESPERSEC)) {
1107         adfs->pwfxDst->nSamplesPerSec = adfs->pwfxSrc->nSamplesPerSec;
1108     }
1109     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WBITSPERSAMPLE)) {
1110         adfs->pwfxDst->wBitsPerSample = adfs->pwfxSrc->wBitsPerSample;
1111     }
1112     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WFORMATTAG)) {
1113         if (adfs->pwfxSrc->wFormatTag != WAVE_FORMAT_PCM) {
1114             WARN("source format 0x%x not supported\n", adfs->pwfxSrc->wFormatTag);
1115             return ACMERR_NOTPOSSIBLE;
1116         }
1117         adfs->pwfxDst->wFormatTag = adfs->pwfxSrc->wFormatTag;
1118     } else {
1119         if (adfs->pwfxDst->wFormatTag != WAVE_FORMAT_PCM) {
1120             WARN("destination format 0x%x not supported\n", adfs->pwfxDst->wFormatTag);
1121             return ACMERR_NOTPOSSIBLE;
1122         }
1123     }
1124     /* check if result is ok */
1125     if (PCM_GetFormatIndex(adfs->pwfxDst) == 0xFFFFFFFF) {
1126         WARN("not possible\n");
1127         return ACMERR_NOTPOSSIBLE;
1128     }
1129 
1130     /* recompute other values */
1131     adfs->pwfxDst->nBlockAlign = (adfs->pwfxDst->nChannels * adfs->pwfxDst->wBitsPerSample) / 8;
1132     adfs->pwfxDst->nAvgBytesPerSec = adfs->pwfxDst->nSamplesPerSec * adfs->pwfxDst->nBlockAlign;
1133 
1134     return MMSYSERR_NOERROR;
1135 }
1136 
1137 /***********************************************************************
1138  *           PCM_StreamOpen
1139  *
1140  */
1141 static	LRESULT	PCM_StreamOpen(PACMDRVSTREAMINSTANCE adsi)
1142 {
1143     AcmPcmData* apd;
1144     int idx;
1145     DWORD flags;
1146 
1147     TRACE("(%p)\n", adsi);
1148 
1149     assert(!(adsi->fdwOpen & ACM_STREAMOPENF_ASYNC));
1150 
1151     switch(adsi->pwfxSrc->wBitsPerSample){
1152     case 8:
1153         idx = 0;
1154         break;
1155     case 16:
1156         idx = 12;
1157         break;
1158     case 24:
1159         if (adsi->pwfxSrc->nBlockAlign != 3 * adsi->pwfxSrc->nChannels) {
1160             FIXME("Source: 24-bit samples must be packed\n");
1161             return MMSYSERR_NOTSUPPORTED;
1162         }
1163         idx = 24;
1164         break;
1165     default:
1166         FIXME("Unsupported source bit depth: %u\n", adsi->pwfxSrc->wBitsPerSample);
1167         return MMSYSERR_NOTSUPPORTED;
1168     }
1169 
1170     switch(adsi->pwfxDst->wBitsPerSample){
1171     case 8:
1172         break;
1173     case 16:
1174         idx += 4;
1175         break;
1176     case 24:
1177         if (adsi->pwfxDst->nBlockAlign != 3 * adsi->pwfxDst->nChannels) {
1178             FIXME("Destination: 24-bit samples must be packed\n");
1179             return MMSYSERR_NOTSUPPORTED;
1180         }
1181         idx += 8;
1182         break;
1183     default:
1184         FIXME("Unsupported destination bit depth: %u\n", adsi->pwfxDst->wBitsPerSample);
1185         return MMSYSERR_NOTSUPPORTED;
1186     }
1187 
1188     if (adsi->pwfxSrc->nChannels      == 1)  idx += 2;
1189 
1190     if (adsi->pwfxDst->nChannels      == 1)  idx += 1;
1191 
1192     apd = HeapAlloc(GetProcessHeap(), 0, sizeof(AcmPcmData));
1193     if (!apd)
1194         return MMSYSERR_NOMEM;
1195 
1196     if (adsi->pwfxSrc->nSamplesPerSec == adsi->pwfxDst->nSamplesPerSec) {
1197         flags = 0;
1198         apd->cvt.cvtKeepRate = PCM_ConvertKeepRate[idx];
1199     } else {
1200         flags = PCM_RESAMPLE;
1201         apd->cvt.cvtChangeRate = PCM_ConvertChangeRate[idx];
1202     }
1203 
1204     if(!apd->cvt.cvtChangeRate && !apd->cvt.cvtKeepRate){
1205         FIXME("Unimplemented conversion from %u -> %u bps\n",
1206             adsi->pwfxSrc->wBitsPerSample,
1207             adsi->pwfxDst->wBitsPerSample);
1208         HeapFree(GetProcessHeap(), 0, apd);
1209         return MMSYSERR_NOTSUPPORTED;
1210     }
1211 
1212     adsi->dwDriver = (DWORD_PTR)apd;
1213     adsi->fdwDriver = flags;
1214 
1215     return MMSYSERR_NOERROR;
1216 }
1217 
1218 /***********************************************************************
1219  *           PCM_StreamClose
1220  *
1221  */
1222 static	LRESULT	PCM_StreamClose(PACMDRVSTREAMINSTANCE adsi)
1223 {
1224     TRACE("(%p)\n", adsi);
1225 
1226     HeapFree(GetProcessHeap(), 0, (void*)adsi->dwDriver);
1227     return MMSYSERR_NOERROR;
1228 }
1229 
1230 /***********************************************************************
1231  *           PCM_round
1232  *
1233  */
1234 static	inline DWORD	PCM_round(DWORD a, DWORD b, DWORD c)
1235 {
1236     assert(c);
1237     /* to be sure, always return an entire number of c... */
1238     return ((double)a * (double)b + (double)c - 1) / (double)c;
1239 }
1240 
1241 /***********************************************************************
1242  *           PCM_StreamSize
1243  *
1244  */
1245 static	LRESULT PCM_StreamSize(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMSIZE adss)
1246 {
1247     DWORD	srcMask = ~(adsi->pwfxSrc->nBlockAlign - 1);
1248     DWORD	dstMask = ~(adsi->pwfxDst->nBlockAlign - 1);
1249 
1250     TRACE("(%p, %p)\n", adsi, adss);
1251 
1252     switch (adss->fdwSize) {
1253     case ACM_STREAMSIZEF_DESTINATION:
1254 	/* cbDstLength => cbSrcLength */
1255 	adss->cbSrcLength = PCM_round(adss->cbDstLength & dstMask,
1256 				      adsi->pwfxSrc->nAvgBytesPerSec,
1257 				      adsi->pwfxDst->nAvgBytesPerSec) & srcMask;
1258 	break;
1259     case ACM_STREAMSIZEF_SOURCE:
1260 	/* cbSrcLength => cbDstLength */
1261 	adss->cbDstLength =  PCM_round(adss->cbSrcLength & srcMask,
1262 				       adsi->pwfxDst->nAvgBytesPerSec,
1263 				       adsi->pwfxSrc->nAvgBytesPerSec) & dstMask;
1264 	break;
1265     default:
1266 	WARN("Unsupported query %08x\n", adss->fdwSize);
1267 	return MMSYSERR_NOTSUPPORTED;
1268     }
1269     return MMSYSERR_NOERROR;
1270 }
1271 
1272 /***********************************************************************
1273  *           PCM_StreamConvert
1274  *
1275  */
1276 static LRESULT PCM_StreamConvert(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMHEADER adsh)
1277 {
1278     AcmPcmData*	apd = (AcmPcmData*)adsi->dwDriver;
1279     DWORD	nsrc = NUM_OF(adsh->cbSrcLength, adsi->pwfxSrc->nBlockAlign);
1280     DWORD	ndst = NUM_OF(adsh->cbDstLength, adsi->pwfxDst->nBlockAlign);
1281 
1282     TRACE("(%p, %p)\n", adsi, adsh);
1283 
1284     TRACE("nsrc=%d,adsh->cbSrcLength=%d\n", nsrc, adsh->cbSrcLength);
1285     TRACE("ndst=%d,adsh->cbDstLength=%d\n", ndst, adsh->cbDstLength);
1286     TRACE("src [wFormatTag=%u, nChannels=%u, nSamplesPerSec=%u, nAvgBytesPerSec=%u, nBlockAlign=%u, wBitsPerSample=%u, cbSize=%u]\n",
1287           adsi->pwfxSrc->wFormatTag, adsi->pwfxSrc->nChannels, adsi->pwfxSrc->nSamplesPerSec, adsi->pwfxSrc->nAvgBytesPerSec,
1288           adsi->pwfxSrc->nBlockAlign, adsi->pwfxSrc->wBitsPerSample, adsi->pwfxSrc->cbSize);
1289     TRACE("dst [wFormatTag=%u, nChannels=%u, nSamplesPerSec=%u, nAvgBytesPerSec=%u, nBlockAlign=%u, wBitsPerSample=%u, cbSize=%u]\n",
1290           adsi->pwfxDst->wFormatTag, adsi->pwfxDst->nChannels, adsi->pwfxDst->nSamplesPerSec, adsi->pwfxDst->nAvgBytesPerSec,
1291           adsi->pwfxDst->nBlockAlign, adsi->pwfxDst->wBitsPerSample, adsi->pwfxDst->cbSize);
1292 
1293     if (adsh->fdwConvert &
1294 	~(ACM_STREAMCONVERTF_BLOCKALIGN|
1295 	  ACM_STREAMCONVERTF_END|
1296 	  ACM_STREAMCONVERTF_START)) {
1297 	FIXME("Unsupported fdwConvert (%08x), ignoring it\n", adsh->fdwConvert);
1298     }
1299     /* ACM_STREAMCONVERTF_BLOCKALIGN
1300      *	currently all conversions are block aligned, so do nothing for this flag
1301      * ACM_STREAMCONVERTF_END
1302      *	no pending data, so do nothing for this flag
1303      */
1304     if ((adsh->fdwConvert & ACM_STREAMCONVERTF_START) &&
1305 	(adsi->fdwDriver & PCM_RESAMPLE)) {
1306     }
1307 
1308     /* do the job */
1309     if (adsi->fdwDriver & PCM_RESAMPLE) {
1310         apd->cvt.cvtChangeRate(adsi->pwfxSrc->nSamplesPerSec, adsh->pbSrc, &nsrc,
1311                                adsi->pwfxDst->nSamplesPerSec, adsh->pbDst, &ndst);
1312     } else {
1313 	if (nsrc < ndst) ndst = nsrc; else nsrc = ndst;
1314 
1315 	/* nsrc is now equal to ndst */
1316 	apd->cvt.cvtKeepRate(adsh->pbSrc, nsrc, adsh->pbDst);
1317     }
1318 
1319     adsh->cbSrcLengthUsed = nsrc * adsi->pwfxSrc->nBlockAlign;
1320     adsh->cbDstLengthUsed = ndst * adsi->pwfxDst->nBlockAlign;
1321 
1322     return MMSYSERR_NOERROR;
1323 }
1324 
1325 /**************************************************************************
1326  * 			DriverProc (MSACM32.@)
1327  */
1328 LRESULT CALLBACK PCM_DriverProc(DWORD_PTR dwDevID, HDRVR hDriv, UINT wMsg,
1329 				       LPARAM dwParam1, LPARAM dwParam2)
1330 {
1331     TRACE("(%08lx %p %u %08lx %08lx);\n",
1332           dwDevID, hDriv, wMsg, dwParam1, dwParam2);
1333 
1334     switch (wMsg) {
1335     case DRV_LOAD:		return 1;
1336     case DRV_FREE:		return 1;
1337     case DRV_OPEN:		return PCM_drvOpen((LPSTR)dwParam1, (PACMDRVOPENDESCW)dwParam2);
1338     case DRV_CLOSE:		return PCM_drvClose(dwDevID);
1339     case DRV_ENABLE:		return 1;
1340     case DRV_DISABLE:		return 1;
1341     case DRV_QUERYCONFIGURE:	return 1;
1342     case DRV_CONFIGURE:		MessageBoxA(0, "MSACM PCM filter !", "Wine Driver", MB_OK); return 1;
1343     case DRV_INSTALL:		return DRVCNF_RESTART;
1344     case DRV_REMOVE:		return DRVCNF_RESTART;
1345 
1346     case ACMDM_DRIVER_NOTIFY:
1347 	/* no caching from other ACM drivers is done so far */
1348 	return MMSYSERR_NOERROR;
1349 
1350     case ACMDM_DRIVER_DETAILS:
1351 	return PCM_DriverDetails((PACMDRIVERDETAILSW)dwParam1);
1352 
1353     case ACMDM_FORMATTAG_DETAILS:
1354 	return PCM_FormatTagDetails((PACMFORMATTAGDETAILSW)dwParam1, dwParam2);
1355 
1356     case ACMDM_FORMAT_DETAILS:
1357 	return PCM_FormatDetails((PACMFORMATDETAILSW)dwParam1, dwParam2);
1358 
1359     case ACMDM_FORMAT_SUGGEST:
1360 	return PCM_FormatSuggest((PACMDRVFORMATSUGGEST)dwParam1);
1361 
1362     case ACMDM_STREAM_OPEN:
1363 	return PCM_StreamOpen((PACMDRVSTREAMINSTANCE)dwParam1);
1364 
1365     case ACMDM_STREAM_CLOSE:
1366 	return PCM_StreamClose((PACMDRVSTREAMINSTANCE)dwParam1);
1367 
1368     case ACMDM_STREAM_SIZE:
1369 	return PCM_StreamSize((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMSIZE)dwParam2);
1370 
1371     case ACMDM_STREAM_CONVERT:
1372 	return PCM_StreamConvert((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMHEADER)dwParam2);
1373 
1374     case ACMDM_HARDWARE_WAVE_CAPS_INPUT:
1375     case ACMDM_HARDWARE_WAVE_CAPS_OUTPUT:
1376 	/* this converter is not a hardware driver */
1377     case ACMDM_FILTERTAG_DETAILS:
1378     case ACMDM_FILTER_DETAILS:
1379 	/* this converter is not a filter */
1380     case ACMDM_STREAM_RESET:
1381 	/* only needed for asynchronous driver... we aren't, so just say it */
1382     case ACMDM_STREAM_PREPARE:
1383     case ACMDM_STREAM_UNPREPARE:
1384 	/* nothing special to do here... so don't do anything */
1385 	return MMSYSERR_NOTSUPPORTED;
1386 
1387     default:
1388 	return DefDriverProc(dwDevID, hDriv, wMsg, dwParam1, dwParam2);
1389     }
1390 }
1391