1 /* -*- tab-width: 8; c-basic-offset: 4 -*- */
6 * Copyright 2000 Eric Pouech
9 * + most of the computation should be done in fixed point arithmetic
10 * instead of floating point (16 bits for integral part, and 16 bits
11 * for fractional part for example)
12 * + implement PCM_FormatSuggest function
13 * + get rid of hack for PCM_DriverProc (msacm32.dll shouldn't export
14 * a DriverProc, but this would require implementing a generic
15 * embedded driver handling scheme in msacm32.dll which isn't done yet
32 #include "debugtools.h"
34 DEFAULT_DEBUG_CHANNEL(msacm);
36 /***********************************************************************
39 static DWORD PCM_drvOpen(LPCSTR str, PACMDRVOPENDESCW adod)
41 return (adod == NULL) ||
42 (adod->fccType == ACMDRIVERDETAILS_FCCTYPE_AUDIOCODEC &&
43 adod->fccComp == ACMDRIVERDETAILS_FCCCOMP_UNDEFINED);
46 /***********************************************************************
49 static DWORD PCM_drvClose(DWORD dwDevID)
54 #define NUM_PCM_FORMATS (sizeof(PCM_Formats) / sizeof(PCM_Formats[0]))
55 #define NUM_OF(a,b) (((a)+(b)-1)/(b))
57 /* flags for fdwDriver */
58 #define PCM_RESAMPLE 1
60 /* data used while converting */
61 typedef struct tagAcmPcmData {
62 /* conversion routine, depending if rate conversion is required */
64 void (*cvtKeepRate)(const unsigned char*, int, unsigned char*);
65 void (*cvtChangeRate)(struct tagAcmPcmData*, const unsigned char*,
66 LPDWORD, unsigned char*, LPDWORD);
68 /* the following fields are used only with rate conversion) */
69 DWORD srcPos; /* position in source stream */
70 double dstPos; /* position in destination stream */
71 double dstIncr; /* value to increment dst stream when src stream
72 is incremented by 1 */
73 /* last source stream value read */
75 unsigned char b; /* 8 bit value */
76 short s; /* 16 bit value */
77 } last[2]; /* two channels max (stereo) */
80 /* table to list all supported formats... those are the basic ones. this
81 * also helps given a unique index to each of the supported formats
88 {1, 8, 8000}, {2, 8, 8000}, {1, 16, 8000}, {2, 16, 8000},
89 {1, 8, 11025}, {2, 8, 11025}, {1, 16, 11025}, {2, 16, 11025},
90 {1, 8, 22050}, {2, 8, 22050}, {1, 16, 22050}, {2, 16, 22050},
91 {1, 8, 44100}, {2, 8, 44100}, {1, 16, 44100}, {2, 16, 44100},
94 /***********************************************************************
97 static DWORD PCM_GetFormatIndex(LPWAVEFORMATEX wfx)
101 for (i = 0; i < NUM_PCM_FORMATS; i++) {
102 if (wfx->nChannels == PCM_Formats[i].nChannels &&
103 wfx->nSamplesPerSec == PCM_Formats[i].rate &&
104 wfx->wBitsPerSample == PCM_Formats[i].nBits)
113 * + 8 bit unsigned vs 16 bit signed
114 * + mono vs stereo (1 or 2 channels)
115 * + sampling rate (8.0, 11.025, 22.05, 44.1 kHz are defined, but algo shall work
118 * mono => stereo: copy the same sample on Left & Right channels
119 * stereo =) mono: use the average value of samples from Left & Right channels
120 * resampling; we lookup for each destination sample the two source adjacent samples
121 * were src <= dst < src+1 (dst is increased by a fractional value which is
122 * equivalent to the increment by one on src); then we use a linear
123 * interpolation between src and src+1
126 /***********************************************************************
129 * Converts a 8 bit sample to a 16 bit one
131 static inline short C816(unsigned char b)
133 return (short)(b ^ 0x80) * 256;
136 /***********************************************************************
139 * Converts a 16 bit sample to a 8 bit one (data loss !!)
141 static inline unsigned char C168(short s)
143 return HIBYTE(s) ^ (unsigned char)0x80;
146 /***********************************************************************
149 * Read a 16 bit sample (correctly handles endianess)
151 static inline short R16(const unsigned char* src)
153 return (short)((unsigned short)src[0] | ((unsigned short)src[1] << 8));
156 /***********************************************************************
159 * Write a 16 bit sample (correctly handles endianess)
161 static inline void W16(unsigned char* dst, short s)
167 /***********************************************************************
170 * Convert the (l,r) 16 bit stereo sample into a 16 bit mono
171 * (takes the mid-point of the two values)
173 static inline short M16(short l, short r)
178 /***********************************************************************
181 * Convert the (l,r) 8 bit stereo sample into a 8 bit mono
182 * (takes the mid-point of the two values)
184 static inline unsigned char M8(unsigned char a, unsigned char b)
186 return (unsigned char)((a + b) / 2);
189 /* the conversion routines without rate conversion are labelled cvt<X><Y><N><M>K
191 * <X> is the (M)ono/(S)tereo configuration of input channel
192 * <Y> is the (M)ono/(S)tereo configuration of output channel
193 * <N> is the number of bits of input channel (8 or 16)
194 * <M> is the number of bits of output channel (8 or 16)
196 * in the parameters, ns is always the number of samples, so the size of input
197 * buffer (resp output buffer) is ns * (<X> == 'Mono' ? 1:2) * (<N> == 8 ? 1:2)
200 static void cvtMM88K(const unsigned char* src, int ns, unsigned char* dst)
202 memcpy(dst, src, ns);
205 static void cvtSS88K(const unsigned char* src, int ns, unsigned char* dst)
207 memcpy(dst, src, ns * 2);
210 static void cvtMM1616K(const unsigned char* src, int ns, unsigned char* dst)
212 memcpy(dst, src, ns * 2);
215 static void cvtSS1616K(const unsigned char* src, int ns, unsigned char* dst)
217 memcpy(dst, src, ns * 4);
220 static void cvtMS88K(const unsigned char* src, int ns, unsigned char* dst)
228 static void cvtMS816K(const unsigned char* src, int ns, unsigned char* dst)
234 W16(dst, v); dst += 2;
235 W16(dst, v); dst += 2;
239 static void cvtMS168K(const unsigned char* src, int ns, unsigned char* dst)
244 v = C168(R16(src)); src += 2;
250 static void cvtMS1616K(const unsigned char* src, int ns, unsigned char* dst)
255 v = R16(src); src += 2;
256 W16(dst, v); dst += 2;
257 W16(dst, v); dst += 2;
261 static void cvtSM88K(const unsigned char* src, int ns, unsigned char* dst)
264 *dst++ = M8(src[0], src[1]);
269 static void cvtSM816K(const unsigned char* src, int ns, unsigned char* dst)
274 v = M16(C816(src[0]), C816(src[1]));
276 W16(dst, v); dst += 2;
280 static void cvtSM168K(const unsigned char* src, int ns, unsigned char* dst)
283 *dst++ = C168(M16(R16(src), R16(src + 2)));
288 static void cvtSM1616K(const unsigned char* src, int ns, unsigned char* dst)
291 W16(dst, M16(R16(src),R16(src+2))); dst += 2;
296 static void cvtMM816K(const unsigned char* src, int ns, unsigned char* dst)
299 W16(dst, C816(*src++)); dst += 2;
303 static void cvtSS816K(const unsigned char* src, int ns, unsigned char* dst)
306 W16(dst, C816(*src++)); dst += 2;
307 W16(dst, C816(*src++)); dst += 2;
311 static void cvtMM168K(const unsigned char* src, int ns, unsigned char* dst)
314 *dst++ = C168(R16(src)); src += 2;
318 static void cvtSS168K(const unsigned char* src, int ns, unsigned char* dst)
321 *dst++ = C168(R16(src)); src += 2;
322 *dst++ = C168(R16(src)); src += 2;
326 static void (*PCM_ConvertKeepRate[16])(const unsigned char*, int, unsigned char*) = {
327 cvtSS88K, cvtSM88K, cvtMS88K, cvtMM88K,
328 cvtSS816K, cvtSM816K, cvtMS816K, cvtMM816K,
329 cvtSS168K, cvtSM168K, cvtMS168K, cvtMM168K,
330 cvtSS1616K, cvtSM1616K, cvtMS1616K, cvtMM1616K,
333 /***********************************************************************
336 * Interpolate the value at r (r in ]0, 1]) between the two points v1 and v2
337 * Linear interpolation is used
339 static inline double I(double v1, double v2, double r)
341 if (0.0 >= r || r > 1.0) FIXME("r!! %f\n", r);
342 return (1.0 - r) * v1 + r * v2;
345 static void cvtSS88C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
346 unsigned char* dst, LPDWORD ndst)
350 while (*nsrc != 0 && *ndst != 0) {
351 while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
352 if (*nsrc == 0) return;
353 apd->last[0].b = *src++;
354 apd->last[1].b = *src++;
358 /* now do the interpolation */
359 *dst++ = I(apd->last[0].b, src[0], r);
360 *dst++ = I(apd->last[1].b, src[1], r);
361 apd->dstPos += apd->dstIncr;
366 /* the conversion routines with rate conversion are labelled cvt<X><Y><N><M>C
368 * <X> is the (M)ono/(S)tereo configuration of input channel
369 * <Y> is the (M)ono/(S)tereo configuration of output channel
370 * <N> is the number of bits of input channel (8 or 16)
371 * <M> is the number of bits of output channel (8 or 16)
374 static void cvtSM88C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
375 unsigned char* dst, LPDWORD ndst)
379 while (*nsrc != 0 && *ndst != 0) {
380 while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
381 if (*nsrc == 0) return;
382 apd->last[0].b = *src++;
383 apd->last[1].b = *src++;
387 /* now do the interpolation */
388 *dst++ = I(M8(apd->last[0].b, apd->last[1].b), M8(src[0], src[1]), r);
389 apd->dstPos += apd->dstIncr;
394 static void cvtMS88C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
395 unsigned char* dst, LPDWORD ndst)
399 while (*nsrc != 0 && *ndst != 0) {
400 while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
401 if (*nsrc == 0) return;
402 apd->last[0].b = *src++;
406 /* now do the interpolation */
407 dst[0] = dst[1] = I(apd->last[0].b, src[0], r);
409 apd->dstPos += apd->dstIncr;
414 static void cvtMM88C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
415 unsigned char* dst, LPDWORD ndst)
419 while (*nsrc != 0 && *ndst != 0) {
420 while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
421 if (*nsrc == 0) return;
422 apd->last[0].b = *src++;
426 /* now do the interpolation */
427 *dst++ = I(apd->last[0].b, src[0], r);
428 apd->dstPos += apd->dstIncr;
433 static void cvtSS816C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
434 unsigned char* dst, LPDWORD ndst)
438 while (*nsrc != 0 && *ndst != 0) {
439 while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
440 if (*nsrc == 0) return;
441 apd->last[0].b = *src++;
442 apd->last[1].b = *src++;
446 /* now do the interpolation */
447 W16(dst, I(C816(apd->last[0].b), C816(src[0]), r)); dst += 2;
448 W16(dst, I(C816(apd->last[1].b), C816(src[1]), r)); dst += 2;
449 apd->dstPos += apd->dstIncr;
454 static void cvtSM816C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
455 unsigned char* dst, LPDWORD ndst)
459 while (*nsrc != 0 && *ndst != 0) {
460 while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
461 if (*nsrc == 0) return;
462 apd->last[0].b = *src++;
463 apd->last[1].b = *src++;
467 /* now do the interpolation */
468 W16(dst, I(M16(C816(apd->last[0].b), C816(apd->last[1].b)),
469 M16(C816(src[0]), C816(src[1])), r));
471 apd->dstPos += apd->dstIncr;
476 static void cvtMS816C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
477 unsigned char* dst, LPDWORD ndst)
482 while (*nsrc != 0 && *ndst != 0) {
483 while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
484 if (*nsrc == 0) return;
485 apd->last[0].b = *src++;
489 /* now do the interpolation */
490 v = I(C816(apd->last[0].b), C816(src[0]), r);
491 W16(dst, v); dst += 2;
492 W16(dst, v); dst += 2;
493 apd->dstPos += apd->dstIncr;
498 static void cvtMM816C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
499 unsigned char* dst, LPDWORD ndst)
503 while (*nsrc != 0 && *ndst != 0) {
504 while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
505 if (*nsrc == 0) return;
506 apd->last[0].b = *src++;
510 /* now do the interpolation */
511 W16(dst, I(C816(apd->last[0].b), C816(src[0]), r));
513 apd->dstPos += apd->dstIncr;
518 static void cvtSS168C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
519 unsigned char* dst, LPDWORD ndst)
523 while (*nsrc != 0 && *ndst != 0) {
524 while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
525 if (*nsrc == 0) return;
526 apd->last[0].s = R16(src); src += 2;
527 apd->last[1].s = R16(src); src += 2;
531 /* now do the interpolation */
532 *dst++ = C168(I(apd->last[0].s, R16(src) , r));
533 *dst++ = C168(I(apd->last[1].s, R16(src+2), r));
534 apd->dstPos += apd->dstIncr;
539 static void cvtSM168C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
540 unsigned char* dst, LPDWORD ndst)
544 while (*nsrc != 0 && *ndst != 0) {
545 while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
546 if (*nsrc == 0) return;
547 apd->last[0].s = R16(src); src += 2;
548 apd->last[1].s = R16(src); src += 2;
552 /* now do the interpolation */
553 *dst++ = C168(I(M16(apd->last[0].s, apd->last[1].s),
554 M16(R16(src), R16(src + 2)), r));
555 apd->dstPos += apd->dstIncr;
561 static void cvtMS168C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
562 unsigned char* dst, LPDWORD ndst)
566 while (*nsrc != 0 && *ndst != 0) {
567 while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
568 if (*nsrc == 0) return;
569 apd->last[0].s = R16(src); src += 2;
573 /* now do the interpolation */
574 dst[0] = dst[1] = C168(I(apd->last[0].s, R16(src), r)); dst += 2;
575 apd->dstPos += apd->dstIncr;
581 static void cvtMM168C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
582 unsigned char* dst, LPDWORD ndst)
586 while (*nsrc != 0 && *ndst != 0) {
587 while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
588 if (*nsrc == 0) return;
589 apd->last[0].s = R16(src); src += 2;
593 /* now do the interpolation */
594 *dst++ = C168(I(apd->last[0].s, R16(src), r));
595 apd->dstPos += apd->dstIncr;
600 static void cvtSS1616C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
601 unsigned char* dst, LPDWORD ndst)
605 while (*nsrc != 0 && *ndst != 0) {
606 while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
607 if (*nsrc == 0) return;
608 apd->last[0].s = R16(src); src += 2;
609 apd->last[1].s = R16(src); src += 2;
613 /* now do the interpolation */
614 W16(dst, I(apd->last[0].s, R16(src) , r)); dst += 2;
615 W16(dst, I(apd->last[1].s, R16(src+2), r)); dst += 2;
616 apd->dstPos += apd->dstIncr;
621 static void cvtSM1616C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
622 unsigned char* dst, LPDWORD ndst)
626 while (*nsrc != 0 && *ndst != 0) {
627 while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
628 if (*nsrc == 0) return;
629 apd->last[0].s = R16(src); src += 2;
630 apd->last[1].s = R16(src); src += 2;
634 /* now do the interpolation */
635 W16(dst, I(M16(apd->last[0].s, apd->last[1].s),
636 M16(R16(src), R16(src+2)), r));
638 apd->dstPos += apd->dstIncr;
643 static void cvtMS1616C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
644 unsigned char* dst, LPDWORD ndst)
649 while (*nsrc != 0 && *ndst != 0) {
650 while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
651 if (*nsrc == 0) return;
652 apd->last[0].s = R16(src); src += 2;
656 /* now do the interpolation */
657 v = I(apd->last[0].s, R16(src), r);
658 W16(dst, v); dst += 2;
659 W16(dst, v); dst += 2;
660 apd->dstPos += apd->dstIncr;
665 static void cvtMM1616C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
666 unsigned char* dst, LPDWORD ndst)
670 while (*nsrc != 0 && *ndst != 0) {
671 while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
672 if (*nsrc == 0) return;
673 apd->last[0].s = R16(src); src += 2;
677 /* now do the interpolation */
678 W16(dst, I(apd->last[0].s, R16(src), r)); dst += 2;
679 apd->dstPos += apd->dstIncr;
684 static void (*PCM_ConvertChangeRate[16])(AcmPcmData* apd,
685 const unsigned char* src, LPDWORD nsrc,
686 unsigned char* dst, LPDWORD ndst) = {
687 cvtSS88C, cvtSM88C, cvtMS88C, cvtMM88C,
688 cvtSS816C, cvtSM816C, cvtMS816C, cvtMM816C,
689 cvtSS168C, cvtSM168C, cvtMS168C, cvtMM168C,
690 cvtSS1616C, cvtSM1616C, cvtMS1616C, cvtMM1616C,
693 /***********************************************************************
697 static LRESULT PCM_DriverDetails(PACMDRIVERDETAILSW add)
699 add->fccType = ACMDRIVERDETAILS_FCCTYPE_AUDIOCODEC;
700 add->fccComp = ACMDRIVERDETAILS_FCCCOMP_UNDEFINED;
703 add->vdwACM = 0x01000000;
704 add->vdwDriver = 0x01000000;
705 add->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CONVERTER;
706 add->cFormatTags = 1;
707 add->cFilterTags = 0;
708 add->hicon = (HICON)0;
709 MultiByteToWideChar( CP_ACP, 0, "WINE-PCM", -1,
710 add->szShortName, sizeof(add->szShortName)/sizeof(WCHAR) );
711 MultiByteToWideChar( CP_ACP, 0, "Wine PCM converter", -1,
712 add->szLongName, sizeof(add->szLongName)/sizeof(WCHAR) );
713 MultiByteToWideChar( CP_ACP, 0, "Brought to you by the Wine team...", -1,
714 add->szCopyright, sizeof(add->szCopyright)/sizeof(WCHAR) );
715 MultiByteToWideChar( CP_ACP, 0, "Refer to LICENSE file", -1,
716 add->szLicensing, sizeof(add->szLicensing)/sizeof(WCHAR) );
717 add->szFeatures[0] = 0;
719 return MMSYSERR_NOERROR;
722 /***********************************************************************
723 * PCM_FormatTagDetails
726 static LRESULT PCM_FormatTagDetails(PACMFORMATTAGDETAILSW aftd, DWORD dwQuery)
729 case ACM_FORMATTAGDETAILSF_INDEX:
730 if (aftd->dwFormatTagIndex != 0) return ACMERR_NOTPOSSIBLE;
732 case ACM_FORMATTAGDETAILSF_FORMATTAG:
733 if (aftd->dwFormatTag != WAVE_FORMAT_PCM) return ACMERR_NOTPOSSIBLE;
735 case ACM_FORMATTAGDETAILSF_LARGESTSIZE:
736 if (aftd->dwFormatTag != WAVE_FORMAT_UNKNOWN &&
737 aftd->dwFormatTag != WAVE_FORMAT_PCM)
738 return ACMERR_NOTPOSSIBLE;
741 WARN("Unsupported query %08lx\n", dwQuery);
742 return MMSYSERR_NOTSUPPORTED;
745 aftd->dwFormatTagIndex = 0;
746 aftd->dwFormatTag = WAVE_FORMAT_PCM;
747 aftd->cbFormatSize = sizeof(PCMWAVEFORMAT);
748 aftd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CONVERTER;
749 aftd->cStandardFormats = NUM_PCM_FORMATS;
750 aftd->szFormatTag[0] = 0;
752 return MMSYSERR_NOERROR;
755 /***********************************************************************
759 static LRESULT PCM_FormatDetails(PACMFORMATDETAILSW afd, DWORD dwQuery)
762 case ACM_FORMATDETAILSF_FORMAT:
763 if (PCM_GetFormatIndex(afd->pwfx) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
765 case ACM_FORMATDETAILSF_INDEX:
766 assert(afd->dwFormatIndex < NUM_PCM_FORMATS);
767 afd->pwfx->wFormatTag = WAVE_FORMAT_PCM;
768 afd->pwfx->nChannels = PCM_Formats[afd->dwFormatIndex].nChannels;
769 afd->pwfx->nSamplesPerSec = PCM_Formats[afd->dwFormatIndex].rate;
770 afd->pwfx->wBitsPerSample = PCM_Formats[afd->dwFormatIndex].nBits;
771 /* native MSACM uses a PCMWAVEFORMAT structure, so cbSize is not accessible
772 * afd->pwfx->cbSize = 0;
774 afd->pwfx->nBlockAlign =
775 (afd->pwfx->nChannels * afd->pwfx->wBitsPerSample) / 8;
776 afd->pwfx->nAvgBytesPerSec =
777 afd->pwfx->nSamplesPerSec * afd->pwfx->nBlockAlign;
780 WARN("Unsupported query %08lx\n", dwQuery);
781 return MMSYSERR_NOTSUPPORTED;
784 afd->dwFormatTag = WAVE_FORMAT_PCM;
785 afd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CONVERTER;
786 afd->szFormat[0] = 0; /* let MSACM format this for us... */
787 afd->cbwfx = sizeof(PCMWAVEFORMAT);
789 return MMSYSERR_NOERROR;
792 /***********************************************************************
796 static LRESULT PCM_FormatSuggest(PACMDRVFORMATSUGGEST adfs)
799 if (adfs->cbwfxSrc < sizeof(PCMWAVEFORMAT) ||
800 adfs->cbwfxDst < sizeof(PCMWAVEFORMAT) ||
801 PCM_GetFormatIndex(adfs->pwfxSrc) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
803 /* is no suggestion for destination, then copy source value */
804 if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NCHANNELS)) {
805 adfs->pwfxDst->nChannels = adfs->pwfxSrc->nChannels;
807 if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NSAMPLESPERSEC)) {
808 adfs->pwfxDst->nSamplesPerSec = adfs->pwfxSrc->nSamplesPerSec;
810 if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WBITSPERSAMPLE)) {
811 adfs->pwfxDst->wBitsPerSample = adfs->pwfxSrc->wBitsPerSample;
813 if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WFORMATTAG)) {
814 if (adfs->pwfxSrc->wFormatTag != WAVE_FORMAT_PCM) return ACMERR_NOTPOSSIBLE;
815 adfs->pwfxDst->wFormatTag = adfs->pwfxSrc->wFormatTag;
817 /* check if result is ok */
818 if (PCM_GetFormatIndex(adfs->pwfxDst) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
820 /* recompute other values */
821 adfs->pwfxDst->nBlockAlign = (adfs->pwfxDst->nChannels * adfs->pwfxDst->wBitsPerSample) / 8;
822 adfs->pwfxDst->nAvgBytesPerSec = adfs->pwfxDst->nSamplesPerSec * adfs->pwfxDst->nBlockAlign;
824 return MMSYSERR_NOERROR;
827 /***********************************************************************
831 static void PCM_Reset(AcmPcmData* apd, int srcNumBits)
835 /* initialize with neutral value */
836 if (srcNumBits == 16) {
840 apd->last[0].b = (BYTE)0x80;
841 apd->last[1].b = (BYTE)0x80;
845 /***********************************************************************
849 static LRESULT PCM_StreamOpen(PACMDRVSTREAMINSTANCE adsi)
854 assert(!(adsi->fdwOpen & ACM_STREAMOPENF_ASYNC));
856 if (PCM_GetFormatIndex(adsi->pwfxSrc) == 0xFFFFFFFF ||
857 PCM_GetFormatIndex(adsi->pwfxDst) == 0xFFFFFFFF)
858 return ACMERR_NOTPOSSIBLE;
860 apd = HeapAlloc(GetProcessHeap(), 0, sizeof(AcmPcmData));
861 if (apd == 0) return MMSYSERR_NOMEM;
863 adsi->dwDriver = (DWORD)apd;
866 if (adsi->pwfxSrc->wBitsPerSample == 16) idx += 8;
867 if (adsi->pwfxDst->wBitsPerSample == 16) idx += 4;
868 if (adsi->pwfxSrc->nChannels == 1) idx += 2;
869 if (adsi->pwfxDst->nChannels == 1) idx += 1;
871 if (adsi->pwfxSrc->nSamplesPerSec == adsi->pwfxDst->nSamplesPerSec) {
872 apd->cvt.cvtKeepRate = PCM_ConvertKeepRate[idx];
874 adsi->fdwDriver |= PCM_RESAMPLE;
875 apd->dstIncr = (double)(adsi->pwfxSrc->nSamplesPerSec) /
876 (double)(adsi->pwfxDst->nSamplesPerSec);
877 PCM_Reset(apd, adsi->pwfxSrc->wBitsPerSample);
878 apd->cvt.cvtChangeRate = PCM_ConvertChangeRate[idx];
881 return MMSYSERR_NOERROR;
884 /***********************************************************************
888 static LRESULT PCM_StreamClose(PACMDRVSTREAMINSTANCE adsi)
890 HeapFree(GetProcessHeap(), 0, (void*)adsi->dwDriver);
891 return MMSYSERR_NOERROR;
894 /***********************************************************************
898 static inline DWORD PCM_round(DWORD a, DWORD b, DWORD c)
901 /* to be sure, always return an entire number of c... */
902 return ((double)a * (double)b + (double)c - 1) / (double)c;
905 /***********************************************************************
909 static LRESULT PCM_StreamSize(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMSIZE adss)
911 DWORD srcMask = ~(adsi->pwfxSrc->nBlockAlign - 1);
912 DWORD dstMask = ~(adsi->pwfxDst->nBlockAlign - 1);
914 switch (adss->fdwSize) {
915 case ACM_STREAMSIZEF_DESTINATION:
916 /* cbDstLength => cbSrcLength */
917 adss->cbSrcLength = PCM_round(adss->cbDstLength & dstMask,
918 adsi->pwfxSrc->nAvgBytesPerSec,
919 adsi->pwfxDst->nAvgBytesPerSec) & srcMask;
921 case ACM_STREAMSIZEF_SOURCE:
922 /* cbSrcLength => cbDstLength */
923 adss->cbDstLength = PCM_round(adss->cbSrcLength & srcMask,
924 adsi->pwfxDst->nAvgBytesPerSec,
925 adsi->pwfxSrc->nAvgBytesPerSec) & dstMask;
928 WARN("Unsupported query %08lx\n", adss->fdwSize);
929 return MMSYSERR_NOTSUPPORTED;
931 return MMSYSERR_NOERROR;
934 /***********************************************************************
938 static LRESULT PCM_StreamConvert(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMHEADER adsh)
940 AcmPcmData* apd = (AcmPcmData*)adsi->dwDriver;
941 DWORD nsrc = NUM_OF(adsh->cbSrcLength, adsi->pwfxSrc->nBlockAlign);
942 DWORD ndst = NUM_OF(adsh->cbDstLength, adsi->pwfxDst->nBlockAlign);
944 if (adsh->fdwConvert &
945 ~(ACM_STREAMCONVERTF_BLOCKALIGN|
946 ACM_STREAMCONVERTF_END|
947 ACM_STREAMCONVERTF_START)) {
948 FIXME("Unsupported fdwConvert (%08lx), ignoring it\n", adsh->fdwConvert);
950 /* ACM_STREAMCONVERTF_BLOCKALIGN
951 * currently all conversions are block aligned, so do nothing for this flag
952 * ACM_STREAMCONVERTF_END
953 * no pending data, so do nothing for this flag
955 if ((adsh->fdwConvert & ACM_STREAMCONVERTF_START) &&
956 (adsi->fdwDriver & PCM_RESAMPLE)) {
957 PCM_Reset(apd, adsi->pwfxSrc->wBitsPerSample);
961 if (adsi->fdwDriver & PCM_RESAMPLE) {
965 apd->cvt.cvtChangeRate(apd, adsh->pbSrc, &nsrc2, adsh->pbDst, &ndst2);
969 if (nsrc < ndst) ndst = nsrc; else nsrc = ndst;
971 /* nsrc is now equal to ndst */
972 apd->cvt.cvtKeepRate(adsh->pbSrc, nsrc, adsh->pbDst);
975 adsh->cbSrcLengthUsed = nsrc * adsi->pwfxSrc->nBlockAlign;
976 adsh->cbDstLengthUsed = ndst * adsi->pwfxDst->nBlockAlign;
978 return MMSYSERR_NOERROR;
981 /**************************************************************************
982 * DriverProc (MSACM32.@)
984 LRESULT CALLBACK PCM_DriverProc(DWORD dwDevID, HDRVR hDriv, UINT wMsg,
985 LPARAM dwParam1, LPARAM dwParam2)
987 TRACE("(%08lx %08lx %u %08lx %08lx);\n",
988 dwDevID, (DWORD)hDriv, wMsg, dwParam1, dwParam2);
991 case DRV_LOAD: return 1;
992 case DRV_FREE: return 1;
993 case DRV_OPEN: return PCM_drvOpen((LPSTR)dwParam1, (PACMDRVOPENDESCW)dwParam2);
994 case DRV_CLOSE: return PCM_drvClose(dwDevID);
995 case DRV_ENABLE: return 1;
996 case DRV_DISABLE: return 1;
997 case DRV_QUERYCONFIGURE: return 1;
998 case DRV_CONFIGURE: MessageBoxA(0, "MSACM PCM filter !", "Wine Driver", MB_OK); return 1;
999 case DRV_INSTALL: return DRVCNF_RESTART;
1000 case DRV_REMOVE: return DRVCNF_RESTART;
1002 case ACMDM_DRIVER_NOTIFY:
1003 /* no caching from other ACM drivers is done so far */
1004 return MMSYSERR_NOERROR;
1006 case ACMDM_DRIVER_DETAILS:
1007 return PCM_DriverDetails((PACMDRIVERDETAILSW)dwParam1);
1009 case ACMDM_FORMATTAG_DETAILS:
1010 return PCM_FormatTagDetails((PACMFORMATTAGDETAILSW)dwParam1, dwParam2);
1012 case ACMDM_FORMAT_DETAILS:
1013 return PCM_FormatDetails((PACMFORMATDETAILSW)dwParam1, dwParam2);
1015 case ACMDM_FORMAT_SUGGEST:
1016 return PCM_FormatSuggest((PACMDRVFORMATSUGGEST)dwParam1);
1018 case ACMDM_STREAM_OPEN:
1019 return PCM_StreamOpen((PACMDRVSTREAMINSTANCE)dwParam1);
1021 case ACMDM_STREAM_CLOSE:
1022 return PCM_StreamClose((PACMDRVSTREAMINSTANCE)dwParam1);
1024 case ACMDM_STREAM_SIZE:
1025 return PCM_StreamSize((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMSIZE)dwParam2);
1027 case ACMDM_STREAM_CONVERT:
1028 return PCM_StreamConvert((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMHEADER)dwParam2);
1030 case ACMDM_HARDWARE_WAVE_CAPS_INPUT:
1031 case ACMDM_HARDWARE_WAVE_CAPS_OUTPUT:
1032 /* this converter is not a hardware driver */
1033 case ACMDM_FILTERTAG_DETAILS:
1034 case ACMDM_FILTER_DETAILS:
1035 /* this converter is not a filter */
1036 case ACMDM_STREAM_RESET:
1037 /* only needed for asynchronous driver... we aren't, so just say it */
1038 case ACMDM_STREAM_PREPARE:
1039 case ACMDM_STREAM_UNPREPARE:
1040 /* nothing special to do here... so don't do anything */
1041 return MMSYSERR_NOTSUPPORTED;
1044 return DefDriverProc(dwDevID, hDriv, wMsg, dwParam1, dwParam2);