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Sweden-Number/dlls/msacm/pcmconverter.c

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/* -*- tab-width: 8; c-basic-offset: 4 -*- */
/*
* MSACM32 library
*
* Copyright 2000 Eric Pouech
*
* FIXME / TODO list
* + most of the computation should be done in fixed point arithmetic
* instead of floating point (16 bits for integral part, and 16 bits
* for fractional part for example)
* + implement PCM_FormatSuggest function
* + get rid of hack for PCM_DriverProc (msacm32.dll shouldn't export
* a DriverProc, but this would require implementing a generic
* embedded driver handling scheme in msacm32.dll which isn't done yet
*/
#include <assert.h>
#include "wine/winestring.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "msacm.h"
#include "msacmdrv.h"
#include "debugtools.h"
DEFAULT_DEBUG_CHANNEL(msacm);
/***********************************************************************
* PCM_drvOpen
*/
static DWORD PCM_drvOpen(LPCSTR str)
{
return 1;
}
/***********************************************************************
* PCM_drvClose
*/
static DWORD PCM_drvClose(DWORD dwDevID)
{
return 1;
}
#define NUM_PCM_FORMATS (sizeof(PCM_Formats) / sizeof(PCM_Formats[0]))
#define NUM_OF(a,b) (((a)+(b)-1)/(b))
/* flags for fdwDriver */
#define PCM_RESAMPLE 1
/* data used while converting */
typedef struct tagAcmPcmData {
/* conversion routine, depending if rate conversion is required */
union {
void (*cvtKeepRate)(const unsigned char*, int, unsigned char*);
void (*cvtChangeRate)(struct tagAcmPcmData*, const unsigned char*,
LPDWORD, unsigned char*, LPDWORD);
} cvt;
/* the following fields are used only with rate conversion) */
DWORD srcPos; /* position in source stream */
double dstPos; /* position in destination stream */
double dstIncr; /* value to increment dst stream when src stream
is incremented by 1 */
/* last source stream value read */
union {
unsigned char b; /* 8 bit value */
short s; /* 16 bit value */
} last[2]; /* two channels max (stereo) */
} AcmPcmData;
/* table to list all supported formats... those are the basic ones. this
* also helps given a unique index to each of the supported formats
*/
static struct {
int nChannels;
int nBits;
int rate;
} PCM_Formats[] = {
{1, 8, 8000}, {2, 8, 8000}, {1, 16, 8000}, {2, 16, 8000},
{1, 8, 11025}, {2, 8, 11025}, {1, 16, 11025}, {2, 16, 11025},
{1, 8, 22050}, {2, 8, 22050}, {1, 16, 22050}, {2, 16, 22050},
{1, 8, 44100}, {2, 8, 44100}, {1, 16, 44100}, {2, 16, 44100},
};
/***********************************************************************
* PCM_GetFormatIndex
*/
static DWORD PCM_GetFormatIndex(LPWAVEFORMATEX wfx)
{
int i;
for (i = 0; i < NUM_PCM_FORMATS; i++) {
if (wfx->nChannels == PCM_Formats[i].nChannels &&
wfx->nSamplesPerSec == PCM_Formats[i].rate &&
wfx->wBitsPerSample == PCM_Formats[i].nBits)
return i;
}
return 0xFFFFFFFF;
}
/* PCM Conversions:
*
* parameters:
* + 8 bit unsigned vs 16 bit signed
* + mono vs stereo (1 or 2 channels)
* + sampling rate (8.0, 11.025, 22.05, 44.1 kHz are defined, but algo shall work
* in all cases)
*
* mono => stereo: copy the same sample on Left & Right channels
* stereo =) mono: use the average value of samples from Left & Right channels
* resampling; we lookup for each destination sample the two source adjacent samples
* were src <= dst < src+1 (dst is increased by a fractional value which is
* equivalent to the increment by one on src); then we use a linear
* interpolation between src and src+1
*/
/***********************************************************************
* C816
*
* Converts a 8 bit sample to a 16 bit one
*/
static inline short C816(unsigned char b)
{
return (short)(b ^ 0x80) * 256;
}
/***********************************************************************
* C168
*
* Converts a 16 bit sample to a 8 bit one (data loss !!)
*/
static inline unsigned char C168(short s)
{
return HIBYTE(s) ^ (unsigned char)0x80;
}
/***********************************************************************
* R16
*
* Read a 16 bit sample (correctly handles endianess)
*/
static inline short R16(const unsigned char* src)
{
return (short)((unsigned short)src[0] | ((unsigned short)src[1] << 8));
}
/***********************************************************************
* W16
*
* Write a 16 bit sample (correctly handles endianess)
*/
static inline void W16(unsigned char* dst, short s)
{
dst[0] = LOBYTE(s);
dst[1] = HIBYTE(s);
}
/***********************************************************************
* M16
*
* Convert the (l,r) 16 bit stereo sample into a 16 bit mono
* (takes the mid-point of the two values)
*/
static inline short M16(short l, short r)
{
return (l + r) / 2;
}
/***********************************************************************
* M8
*
* Convert the (l,r) 8 bit stereo sample into a 8 bit mono
* (takes the mid-point of the two values)
*/
static inline unsigned char M8(unsigned char a, unsigned char b)
{
return (unsigned char)((a + b) / 2);
}
/* the conversion routines without rate conversion are labelled cvt<X><Y><N><M>K
* where :
* <X> is the (M)ono/(S)tereo configuration of input channel
* <Y> is the (M)ono/(S)tereo configuration of output channel
* <N> is the number of bits of input channel (8 or 16)
* <M> is the number of bits of output channel (8 or 16)
*
* in the parameters, ns is always the number of samples, so the size of input
* buffer (resp output buffer) is ns * (<X> == 'Mono' ? 1:2) * (<N> == 8 ? 1:2)
*/
static void cvtMM88K(const unsigned char* src, int ns, unsigned char* dst)
{
memcpy(dst, src, ns);
}
static void cvtSS88K(const unsigned char* src, int ns, unsigned char* dst)
{
memcpy(dst, src, ns * 2);
}
static void cvtMM1616K(const unsigned char* src, int ns, unsigned char* dst)
{
memcpy(dst, src, ns * 2);
}
static void cvtSS1616K(const unsigned char* src, int ns, unsigned char* dst)
{
memcpy(dst, src, ns * 4);
}
static void cvtMS88K(const unsigned char* src, int ns, unsigned char* dst)
{
while (ns--) {
*dst++ = *src;
*dst++ = *src++;
}
}
static void cvtMS816K(const unsigned char* src, int ns, unsigned char* dst)
{
short v;
while (ns--) {
v = C816(*src++);
W16(dst, v); dst += 2;
W16(dst, v); dst += 2;
}
}
static void cvtMS168K(const unsigned char* src, int ns, unsigned char* dst)
{
unsigned char v;
while (ns--) {
v = C168(R16(src)); src += 2;
*dst++ = v;
*dst++ = v;
}
}
static void cvtMS1616K(const unsigned char* src, int ns, unsigned char* dst)
{
short v;
while (ns--) {
v = R16(src); src += 2;
W16(dst, v); dst += 2;
W16(dst, v); dst += 2;
}
}
static void cvtSM88K(const unsigned char* src, int ns, unsigned char* dst)
{
while (ns--) {
*dst++ = M8(src[0], src[1]);
src += 2;
}
}
static void cvtSM816K(const unsigned char* src, int ns, unsigned char* dst)
{
short v;
while (ns--) {
v = M16(C816(src[0]), C816(src[1]));
src += 2;
W16(dst, v); dst += 2;
}
}
static void cvtSM168K(const unsigned char* src, int ns, unsigned char* dst)
{
while (ns--) {
*dst++ = C168(M16(R16(src), R16(src + 2)));
src += 4;
}
}
static void cvtSM1616K(const unsigned char* src, int ns, unsigned char* dst)
{
while (ns--) {
W16(dst, M16(R16(src),R16(src+2))); dst += 2;
src += 4;
}
}
static void cvtMM816K(const unsigned char* src, int ns, unsigned char* dst)
{
while (ns--) {
W16(dst, C816(*src++)); dst += 2;
}
}
static void cvtSS816K(const unsigned char* src, int ns, unsigned char* dst)
{
while (ns--) {
W16(dst, C816(*src++)); dst += 2;
W16(dst, C816(*src++)); dst += 2;
}
}
static void cvtMM168K(const unsigned char* src, int ns, unsigned char* dst)
{
while (ns--) {
*dst++ = C168(R16(src)); src += 2;
}
}
static void cvtSS168K(const unsigned char* src, int ns, unsigned char* dst)
{
while (ns--) {
*dst++ = C168(R16(src)); src += 2;
*dst++ = C168(R16(src)); src += 2;
}
}
static void (*PCM_ConvertKeepRate[16])(const unsigned char*, int, unsigned char*) = {
cvtSS88K, cvtSM88K, cvtMS88K, cvtMM88K,
cvtSS816K, cvtSM816K, cvtMS816K, cvtMM816K,
cvtSS168K, cvtSM168K, cvtMS168K, cvtMM168K,
cvtSS1616K, cvtSM1616K, cvtMS1616K, cvtMM1616K,
};
/***********************************************************************
* I
*
* Interpolate the value at r (r in ]0, 1]) between the two points v1 and v2
* Linear interpolation is used
*/
static inline double I(double v1, double v2, double r)
{
if (0.0 >= r || r > 1.0) FIXME("r!! %f\n", r);
return (1.0 - r) * v1 + r * v2;
}
static void cvtSS88C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
unsigned char* dst, LPDWORD ndst)
{
double r;
while (*nsrc != 0 && *ndst != 0) {
while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
if (*nsrc == 0) return;
apd->last[0].b = *src++;
apd->last[1].b = *src++;
apd->srcPos++;
(*nsrc)--;
}
/* now do the interpolation */
*dst++ = I(apd->last[0].b, src[0], r);
*dst++ = I(apd->last[1].b, src[1], r);
apd->dstPos += apd->dstIncr;
(*ndst)--;
}
}
/* the conversion routines with rate conversion are labelled cvt<X><Y><N><M>C
* where :
* <X> is the (M)ono/(S)tereo configuration of input channel
* <Y> is the (M)ono/(S)tereo configuration of output channel
* <N> is the number of bits of input channel (8 or 16)
* <M> is the number of bits of output channel (8 or 16)
*
*/
static void cvtSM88C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
unsigned char* dst, LPDWORD ndst)
{
double r;
while (*nsrc != 0 && *ndst != 0) {
while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
if (*nsrc == 0) return;
apd->last[0].b = *src++;
apd->last[1].b = *src++;
apd->srcPos++;
(*nsrc)--;
}
/* now do the interpolation */
*dst++ = I(M8(apd->last[0].b, apd->last[1].b), M8(src[0], src[1]), r);
apd->dstPos += apd->dstIncr;
(*ndst)--;
}
}
static void cvtMS88C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
unsigned char* dst, LPDWORD ndst)
{
double r;
while (*nsrc != 0 && *ndst != 0) {
while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
if (*nsrc == 0) return;
apd->last[0].b = *src++;
apd->srcPos++;
(*nsrc)--;
}
/* now do the interpolation */
dst[0] = dst[1] = I(apd->last[0].b, src[0], r);
dst += 2;
apd->dstPos += apd->dstIncr;
(*ndst)--;
}
}
static void cvtMM88C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
unsigned char* dst, LPDWORD ndst)
{
double r;
while (*nsrc != 0 && *ndst != 0) {
while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
if (*nsrc == 0) return;
apd->last[0].b = *src++;
apd->srcPos++;
(*nsrc)--;
}
/* now do the interpolation */
*dst++ = I(apd->last[0].b, src[0], r);
apd->dstPos += apd->dstIncr;
(*ndst)--;
}
}
static void cvtSS816C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
unsigned char* dst, LPDWORD ndst)
{
double r;
while (*nsrc != 0 && *ndst != 0) {
while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
if (*nsrc == 0) return;
apd->last[0].b = *src++;
apd->last[1].b = *src++;
apd->srcPos++;
(*nsrc)--;
}
/* now do the interpolation */
W16(dst, I(C816(apd->last[0].b), C816(src[0]), r)); dst += 2;
W16(dst, I(C816(apd->last[1].b), C816(src[1]), r)); dst += 2;
apd->dstPos += apd->dstIncr;
(*ndst)--;
}
}
static void cvtSM816C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
unsigned char* dst, LPDWORD ndst)
{
double r;
while (*nsrc != 0 && *ndst != 0) {
while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
if (*nsrc == 0) return;
apd->last[0].b = *src++;
apd->last[1].b = *src++;
apd->srcPos++;
(*nsrc)--;
}
/* now do the interpolation */
W16(dst, I(M16(C816(apd->last[0].b), C816(apd->last[1].b)),
M16(C816(src[0]), C816(src[1])), r));
dst += 2;
apd->dstPos += apd->dstIncr;
(*ndst)--;
}
}
static void cvtMS816C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
unsigned char* dst, LPDWORD ndst)
{
double r;
short v;
while (*nsrc != 0 && *ndst != 0) {
while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
if (*nsrc == 0) return;
apd->last[0].b = *src++;
apd->srcPos++;
(*nsrc)--;
}
/* now do the interpolation */
v = I(C816(apd->last[0].b), C816(src[0]), r);
W16(dst, v); dst += 2;
W16(dst, v); dst += 2;
apd->dstPos += apd->dstIncr;
(*ndst)--;
}
}
static void cvtMM816C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
unsigned char* dst, LPDWORD ndst)
{
double r;
while (*nsrc != 0 && *ndst != 0) {
while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
if (*nsrc == 0) return;
apd->last[0].b = *src++;
apd->srcPos++;
(*nsrc)--;
}
/* now do the interpolation */
W16(dst, I(C816(apd->last[0].b), C816(src[0]), r));
dst += 2;
apd->dstPos += apd->dstIncr;
(*ndst)--;
}
}
static void cvtSS168C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
unsigned char* dst, LPDWORD ndst)
{
double r;
while (*nsrc != 0 && *ndst != 0) {
while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
if (*nsrc == 0) return;
apd->last[0].s = R16(src); src += 2;
apd->last[1].s = R16(src); src += 2;
apd->srcPos++;
(*nsrc)--;
}
/* now do the interpolation */
*dst++ = C168(I(apd->last[0].s, R16(src) , r));
*dst++ = C168(I(apd->last[1].s, R16(src+2), r));
apd->dstPos += apd->dstIncr;
(*ndst)--;
}
}
static void cvtSM168C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
unsigned char* dst, LPDWORD ndst)
{
double r;
while (*nsrc != 0 && *ndst != 0) {
while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
if (*nsrc == 0) return;
apd->last[0].s = R16(src); src += 2;
apd->last[1].s = R16(src); src += 2;
apd->srcPos++;
(*nsrc)--;
}
/* now do the interpolation */
*dst++ = C168(I(M16(apd->last[0].s, apd->last[1].s),
M16(R16(src), R16(src + 2)), r));
apd->dstPos += apd->dstIncr;
(*ndst)--;
}
}
static void cvtMS168C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
unsigned char* dst, LPDWORD ndst)
{
double r;
while (*nsrc != 0 && *ndst != 0) {
while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
if (*nsrc == 0) return;
apd->last[0].s = R16(src); src += 2;
apd->srcPos++;
(*nsrc)--;
}
/* now do the interpolation */
dst[0] = dst[1] = C168(I(apd->last[0].s, R16(src), r)); dst += 2;
apd->dstPos += apd->dstIncr;
(*ndst)--;
}
}
static void cvtMM168C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
unsigned char* dst, LPDWORD ndst)
{
double r;
while (*nsrc != 0 && *ndst != 0) {
while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
if (*nsrc == 0) return;
apd->last[0].s = R16(src); src += 2;
apd->srcPos++;
(*nsrc)--;
}
/* now do the interpolation */
*dst++ = C168(I(apd->last[0].s, R16(src), r));
apd->dstPos += apd->dstIncr;
(*ndst)--;
}
}
static void cvtSS1616C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
unsigned char* dst, LPDWORD ndst)
{
double r;
while (*nsrc != 0 && *ndst != 0) {
while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
if (*nsrc == 0) return;
apd->last[0].s = R16(src); src += 2;
apd->last[1].s = R16(src); src += 2;
apd->srcPos++;
(*nsrc)--;
}
/* now do the interpolation */
W16(dst, I(apd->last[0].s, R16(src) , r)); dst += 2;
W16(dst, I(apd->last[1].s, R16(src+2), r)); dst += 2;
apd->dstPos += apd->dstIncr;
(*ndst)--;
}
}
static void cvtSM1616C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
unsigned char* dst, LPDWORD ndst)
{
double r;
while (*nsrc != 0 && *ndst != 0) {
while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
if (*nsrc == 0) return;
apd->last[0].s = R16(src); src += 2;
apd->last[1].s = R16(src); src += 2;
apd->srcPos++;
(*nsrc)--;
}
/* now do the interpolation */
W16(dst, I(M16(apd->last[0].s, apd->last[1].s),
M16(R16(src), R16(src+2)), r));
dst += 2;
apd->dstPos += apd->dstIncr;
(*ndst)--;
}
}
static void cvtMS1616C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
unsigned char* dst, LPDWORD ndst)
{
double r;
short v;
while (*nsrc != 0 && *ndst != 0) {
while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
if (*nsrc == 0) return;
apd->last[0].s = R16(src); src += 2;
apd->srcPos++;
(*nsrc)--;
}
/* now do the interpolation */
v = I(apd->last[0].s, R16(src), r);
W16(dst, v); dst += 2;
W16(dst, v); dst += 2;
apd->dstPos += apd->dstIncr;
(*ndst)--;
}
}
static void cvtMM1616C(AcmPcmData* apd, const unsigned char* src, LPDWORD nsrc,
unsigned char* dst, LPDWORD ndst)
{
double r;
while (*nsrc != 0 && *ndst != 0) {
while ((r = (double)apd->srcPos - apd->dstPos) <= 0) {
if (*nsrc == 0) return;
apd->last[0].s = R16(src); src += 2;
apd->srcPos++;
(*nsrc)--;
}
/* now do the interpolation */
W16(dst, I(apd->last[0].s, R16(src), r)); dst += 2;
apd->dstPos += apd->dstIncr;
(*ndst)--;
}
}
static void (*PCM_ConvertChangeRate[16])(AcmPcmData* apd,
const unsigned char* src, LPDWORD nsrc,
unsigned char* dst, LPDWORD ndst) = {
cvtSS88C, cvtSM88C, cvtMS88C, cvtMM88C,
cvtSS816C, cvtSM816C, cvtMS816C, cvtMM816C,
cvtSS168C, cvtSM168C, cvtMS168C, cvtMM168C,
cvtSS1616C, cvtSM1616C, cvtMS1616C, cvtMM1616C,
};
/***********************************************************************
* PCM_DriverDetails
*
*/
static LRESULT PCM_DriverDetails(PACMDRIVERDETAILSW add)
{
add->fccType = ACMDRIVERDETAILS_FCCTYPE_AUDIOCODEC;
add->fccComp = ACMDRIVERDETAILS_FCCCOMP_UNDEFINED;
add->wMid = 0xFF;
add->wPid = 0x00;
add->vdwACM = 0x01000000;
add->vdwDriver = 0x01000000;
add->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CONVERTER;
add->cFormatTags = 1;
add->cFilterTags = 0;
add->hicon = (HICON)0;
lstrcpyAtoW(add->szShortName, "WINE-PCM");
lstrcpyAtoW(add->szLongName, "Wine PCM converter");
lstrcpyAtoW(add->szCopyright, "Brought to you by the Wine team...");
lstrcpyAtoW(add->szLicensing, "Refer to LICENSE file");
add->szFeatures[0] = 0;
return MMSYSERR_NOERROR;
}
/***********************************************************************
* PCM_FormatTagDetails
*
*/
static LRESULT PCM_FormatTagDetails(PACMFORMATTAGDETAILSW aftd, DWORD dwQuery)
{
switch (dwQuery) {
case ACM_FORMATTAGDETAILSF_INDEX:
if (aftd->dwFormatTagIndex != 0) return ACMERR_NOTPOSSIBLE;
break;
case ACM_FORMATTAGDETAILSF_FORMATTAG:
if (aftd->dwFormatTag != WAVE_FORMAT_PCM) return ACMERR_NOTPOSSIBLE;
break;
case ACM_FORMATTAGDETAILSF_LARGESTSIZE:
if (aftd->dwFormatTag != WAVE_FORMAT_UNKNOWN &&
aftd->dwFormatTag != WAVE_FORMAT_UNKNOWN)
return ACMERR_NOTPOSSIBLE;
break;
default:
WARN("Unsupported query %08lx\n", dwQuery);
return MMSYSERR_NOTSUPPORTED;
}
aftd->dwFormatTagIndex = 0;
aftd->dwFormatTag = WAVE_FORMAT_PCM;
aftd->cbFormatSize = sizeof(PCMWAVEFORMAT);
aftd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CONVERTER;
aftd->cStandardFormats = NUM_PCM_FORMATS;
aftd->szFormatTag[0] = 0;
return MMSYSERR_NOERROR;
}
/***********************************************************************
* PCM_FormatDetails
*
*/
static LRESULT PCM_FormatDetails(PACMFORMATDETAILSW afd, DWORD dwQuery)
{
switch (dwQuery) {
case ACM_FORMATDETAILSF_FORMAT:
afd->dwFormatIndex = PCM_GetFormatIndex(afd->pwfx);
if (afd->dwFormatIndex == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
break;
case ACM_FORMATDETAILSF_INDEX:
assert(afd->dwFormatIndex < NUM_PCM_FORMATS);
afd->pwfx->wFormatTag = WAVE_FORMAT_PCM;
afd->pwfx->nChannels = PCM_Formats[afd->dwFormatIndex].nChannels;
afd->pwfx->nSamplesPerSec = PCM_Formats[afd->dwFormatIndex].rate;
afd->pwfx->wBitsPerSample = PCM_Formats[afd->dwFormatIndex].nBits;
/* native MSACM uses a PCMWAVEFORMAT structure, so cbSize is not accessible
* afd->pwfx->cbSize = 0;
*/
afd->pwfx->nBlockAlign =
(afd->pwfx->nChannels * afd->pwfx->wBitsPerSample) / 8;
afd->pwfx->nAvgBytesPerSec =
afd->pwfx->nSamplesPerSec * afd->pwfx->nBlockAlign;
break;
default:
WARN("Unsupported query %08lx\n", dwQuery);
return MMSYSERR_NOTSUPPORTED;
}
afd->dwFormatTag = WAVE_FORMAT_PCM;
afd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CONVERTER;
afd->szFormat[0] = 0; /* let MSACM format this for us... */
return MMSYSERR_NOERROR;
}
/***********************************************************************
* PCM_FormatSuggest
*
*/
static LRESULT PCM_FormatSuggest(PACMDRVFORMATSUGGEST adfs)
{
FIXME("(%p);\n", adfs);
return MMSYSERR_NOTSUPPORTED;
}
/***********************************************************************
* PCM_Reset
*
*/
static void PCM_Reset(AcmPcmData* apd, int srcNumBits)
{
apd->srcPos = 0;
apd->dstPos = 0;
/* initialize with neutral value */
if (srcNumBits == 16) {
apd->last[0].s = 0;
apd->last[1].s = 0;
} else {
apd->last[0].b = (BYTE)0x80;
apd->last[1].b = (BYTE)0x80;
}
}
/***********************************************************************
* PCM_StreamOpen
*
*/
static LRESULT PCM_StreamOpen(PACMDRVSTREAMINSTANCE adsi)
{
AcmPcmData* apd;
int idx = 0;
assert(!(adsi->fdwOpen & ACM_STREAMOPENF_ASYNC));
if (PCM_GetFormatIndex(adsi->pwfxSrc) == 0xFFFFFFFF ||
PCM_GetFormatIndex(adsi->pwfxDst) == 0xFFFFFFFF)
return ACMERR_NOTPOSSIBLE;
apd = HeapAlloc(GetProcessHeap(), 0, sizeof(AcmPcmData));
if (apd == 0) return MMSYSERR_NOMEM;
adsi->dwDriver = (DWORD)apd;
adsi->fdwDriver = 0;
if (adsi->pwfxSrc->wBitsPerSample == 16) idx += 8;
if (adsi->pwfxDst->wBitsPerSample == 16) idx += 4;
if (adsi->pwfxSrc->nChannels == 1) idx += 2;
if (adsi->pwfxDst->nChannels == 1) idx += 1;
if (adsi->pwfxSrc->nSamplesPerSec == adsi->pwfxDst->nSamplesPerSec) {
apd->cvt.cvtKeepRate = PCM_ConvertKeepRate[idx];
} else {
adsi->fdwDriver |= PCM_RESAMPLE;
apd->dstIncr = (double)(adsi->pwfxSrc->nSamplesPerSec) /
(double)(adsi->pwfxDst->nSamplesPerSec);
PCM_Reset(apd, adsi->pwfxSrc->wBitsPerSample);
apd->cvt.cvtChangeRate = PCM_ConvertChangeRate[idx];
}
return MMSYSERR_NOERROR;
}
/***********************************************************************
* PCM_StreamClose
*
*/
static LRESULT PCM_StreamClose(PACMDRVSTREAMINSTANCE adsi)
{
HeapFree(GetProcessHeap(), 0, (void*)adsi->dwDriver);
return MMSYSERR_NOERROR;
}
/***********************************************************************
* PCM_round
*
*/
static inline DWORD PCM_round(DWORD a, DWORD b, DWORD c)
{
assert(a && b && c);
/* to be sure, always return an entire number of c... */
return ((double)a * (double)b + (double)c - 1) / (double)c;
}
/***********************************************************************
* PCM_StreamSize
*
*/
static LRESULT PCM_StreamSize(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMSIZE adss)
{
switch (adss->fdwSize) {
case ACM_STREAMSIZEF_DESTINATION:
/* cbDstLength => cbSrcLength */
adss->cbSrcLength = PCM_round(adss->cbDstLength,
adsi->pwfxSrc->nAvgBytesPerSec,
adsi->pwfxDst->nAvgBytesPerSec);
break;
case ACM_STREAMSIZEF_SOURCE:
/* cbSrcLength => cbDstLength */
adss->cbDstLength = PCM_round(adss->cbSrcLength,
adsi->pwfxDst->nAvgBytesPerSec,
adsi->pwfxSrc->nAvgBytesPerSec);
break;
default:
WARN("Unsupported query %08lx\n", adss->fdwSize);
return MMSYSERR_NOTSUPPORTED;
}
return MMSYSERR_NOERROR;
}
/***********************************************************************
* PCM_StreamConvert
*
*/
static LRESULT PCM_StreamConvert(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMHEADER adsh)
{
AcmPcmData* apd = (AcmPcmData*)adsi->dwDriver;
DWORD nsrc = NUM_OF(adsh->cbSrcLength, adsi->pwfxSrc->nBlockAlign);
DWORD ndst = NUM_OF(adsh->cbDstLength, adsi->pwfxDst->nBlockAlign);
if (adsh->fdwConvert &
~(ACM_STREAMCONVERTF_BLOCKALIGN|
ACM_STREAMCONVERTF_END|
ACM_STREAMCONVERTF_START)) {
FIXME("Unsupported fdwConvert (%08lx), ignoring it\n", adsh->fdwConvert);
}
/* ACM_STREAMCONVERTF_BLOCKALIGN
* currently all conversions are block aligned, so do nothing for this flag
* ACM_STREAMCONVERTF_END
* no pending data, so do nothing for this flag
*/
if ((adsh->fdwConvert & ACM_STREAMCONVERTF_START) &&
(adsi->fdwDriver & PCM_RESAMPLE)) {
PCM_Reset(apd, adsi->pwfxSrc->wBitsPerSample);
}
/* do the job */
if (adsi->fdwDriver & PCM_RESAMPLE) {
DWORD nsrc2 = nsrc;
DWORD ndst2 = ndst;
apd->cvt.cvtChangeRate(apd, adsh->pbSrc, &nsrc2, adsh->pbDst, &ndst2);
nsrc -= nsrc2;
ndst -= ndst2;
} else {
if (nsrc < ndst) ndst = nsrc; else nsrc = ndst;
/* nsrc is now equal to ndst */
apd->cvt.cvtKeepRate(adsh->pbSrc, nsrc, adsh->pbDst);
}
adsh->cbSrcLengthUsed = nsrc * adsi->pwfxSrc->nBlockAlign;
adsh->cbDstLengthUsed = ndst * adsi->pwfxDst->nBlockAlign;
return MMSYSERR_NOERROR;
}
/**************************************************************************
* PCM_DriverProc [exported]
*/
LRESULT CALLBACK PCM_DriverProc(DWORD dwDevID, HDRVR hDriv, UINT wMsg,
LPARAM dwParam1, LPARAM dwParam2)
{
TRACE("(%08lx %08lx %u %08lx %08lx);\n",
dwDevID, (DWORD)hDriv, wMsg, dwParam1, dwParam2);
switch (wMsg) {
case DRV_LOAD: return 1;
case DRV_FREE: return 1;
case DRV_OPEN: return PCM_drvOpen((LPSTR)dwParam1);
case DRV_CLOSE: return PCM_drvClose(dwDevID);
case DRV_ENABLE: return 1;
case DRV_DISABLE: return 1;
case DRV_QUERYCONFIGURE: return 1;
case DRV_CONFIGURE: MessageBoxA(0, "MSACM PCM filter !", "Wine Driver", MB_OK); return 1;
case DRV_INSTALL: return DRVCNF_RESTART;
case DRV_REMOVE: return DRVCNF_RESTART;
case ACMDM_DRIVER_NOTIFY:
/* no caching from other ACM drivers is done so far */
return MMSYSERR_NOERROR;
case ACMDM_DRIVER_DETAILS:
return PCM_DriverDetails((PACMDRIVERDETAILSW)dwParam1);
case ACMDM_FORMATTAG_DETAILS:
return PCM_FormatTagDetails((PACMFORMATTAGDETAILSW)dwParam1, dwParam2);
case ACMDM_FORMAT_DETAILS:
return PCM_FormatDetails((PACMFORMATDETAILSW)dwParam1, dwParam2);
case ACMDM_FORMAT_SUGGEST:
return PCM_FormatSuggest((PACMDRVFORMATSUGGEST)dwParam1);
case ACMDM_STREAM_OPEN:
return PCM_StreamOpen((PACMDRVSTREAMINSTANCE)dwParam1);
case ACMDM_STREAM_CLOSE:
return PCM_StreamClose((PACMDRVSTREAMINSTANCE)dwParam1);
case ACMDM_STREAM_SIZE:
return PCM_StreamSize((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMSIZE)dwParam2);
case ACMDM_STREAM_CONVERT:
return PCM_StreamConvert((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMHEADER)dwParam2);
case ACMDM_HARDWARE_WAVE_CAPS_INPUT:
case ACMDM_HARDWARE_WAVE_CAPS_OUTPUT:
/* this converter is not a hardware driver */
case ACMDM_FILTERTAG_DETAILS:
case ACMDM_FILTER_DETAILS:
/* this converter is not a filter */
case ACMDM_STREAM_RESET:
/* only needed for asynchronous driver... we aren't, so just say it */
case ACMDM_STREAM_PREPARE:
case ACMDM_STREAM_UNPREPARE:
/* nothing special to do here... so don't do anything */
return MMSYSERR_NOTSUPPORTED;
default:
return DefDriverProc(dwDevID, hDriv, wMsg, dwParam1, dwParam2);
}
return 0;
}
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