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Sweden-Number/dlls/msacm/imaadp32/imaadp32.c

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/*
* IMA ADPCM handling
*
* Copyright (C) 2001,2002 Eric Pouech
*
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <assert.h>
#include <stdarg.h>
#include <string.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "winnls.h"
#include "mmsystem.h"
#include "mmreg.h"
#include "msacm.h"
#include "../msacmdrv.h"
#include "wine/debug.h"
/* see http://www.pcisys.net/~melanson/codecs/adpcm.txt for the details */
WINE_DEFAULT_DEBUG_CHANNEL(adpcm);
/***********************************************************************
* ADPCM_drvOpen
*/
static DWORD ADPCM_drvOpen(LPCSTR str)
{
return 1;
}
/***********************************************************************
* ADPCM_drvClose
*/
static DWORD ADPCM_drvClose(DWORD dwDevID)
{
return 1;
}
typedef struct tagAcmAdpcmData
{
void (*convert)(PACMDRVSTREAMINSTANCE adsi,
const unsigned char*, LPDWORD, unsigned char*, LPDWORD);
/* IMA encoding only */
BYTE stepIndexL;
BYTE stepIndexR;
/* short sample; */
} AcmAdpcmData;
/* table to list all supported formats... those are the basic ones. this
* also helps given a unique index to each of the supported formats
*/
typedef struct
{
int nChannels;
int nBits;
int rate;
} Format;
static Format 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},
};
static Format ADPCM_Formats[] =
{
{1, 4, 8000}, {2, 4, 8000}, {1, 4, 11025}, {2, 4, 11025},
{1, 4, 22050}, {2, 4, 22050}, {1, 4, 44100}, {2, 4, 44100},
};
#define NUM_PCM_FORMATS (sizeof(PCM_Formats) / sizeof(PCM_Formats[0]))
#define NUM_ADPCM_FORMATS (sizeof(ADPCM_Formats) / sizeof(ADPCM_Formats[0]))
/***********************************************************************
* ADPCM_GetFormatIndex
*/
static DWORD ADPCM_GetFormatIndex(LPWAVEFORMATEX wfx)
{
int i, hi;
Format* fmts;
switch (wfx->wFormatTag)
{
case WAVE_FORMAT_PCM:
hi = NUM_PCM_FORMATS;
fmts = PCM_Formats;
break;
case WAVE_FORMAT_IMA_ADPCM:
hi = NUM_ADPCM_FORMATS;
fmts = ADPCM_Formats;
break;
default:
return 0xFFFFFFFF;
}
for (i = 0; i < hi; i++)
{
if (wfx->nChannels == fmts[i].nChannels &&
wfx->nSamplesPerSec == fmts[i].rate &&
wfx->wBitsPerSample == fmts[i].nBits)
return i;
}
return 0xFFFFFFFF;
}
/***********************************************************************
* 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);
}
/* IMA (or DVI) APDCM codec routines */
static const unsigned IMA_StepTable[89] =
{
7, 8, 9, 10, 11, 12, 13, 14,
16, 17, 19, 21, 23, 25, 28, 31,
34, 37, 41, 45, 50, 55, 60, 66,
73, 80, 88, 97, 107, 118, 130, 143,
157, 173, 190, 209, 230, 253, 279, 307,
337, 371, 408, 449, 494, 544, 598, 658,
724, 796, 876, 963, 1060, 1166, 1282, 1411,
1552, 1707, 1878, 2066, 2272, 2499, 2749, 3024,
3327, 3660, 4026, 4428, 4871, 5358, 5894, 6484,
7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899,
15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794,
32767
};
static const int IMA_IndexTable[16] =
{
-1, -1, -1, -1, 2, 4, 6, 8,
-1, -1, -1, -1, 2, 4, 6, 8
};
static inline void clamp_step_index(int* stepIndex)
{
if (*stepIndex < 0 ) *stepIndex = 0;
if (*stepIndex > 88) *stepIndex = 88;
}
static inline void clamp_sample(int* sample)
{
if (*sample < -32768) *sample = -32768;
if (*sample > 32767) *sample = 32767;
}
static inline void process_nibble(unsigned char code, int* stepIndex, int* sample)
{
unsigned step;
int diff;
code &= 0x0F;
step = IMA_StepTable[*stepIndex];
diff = step >> 3;
if (code & 1) diff += step >> 2;
if (code & 2) diff += step >> 1;
if (code & 4) diff += step;
if (code & 8) *sample -= diff;
else *sample += diff;
clamp_sample(sample);
*stepIndex += IMA_IndexTable[code];
clamp_step_index(stepIndex);
}
static inline unsigned char generate_nibble(int in, int* stepIndex, int* sample)
{
int effdiff, diff = in - *sample;
unsigned step;
unsigned char code;
if (diff < 0)
{
diff = -diff;
code = 8;
}
else
{
code = 0;
}
step = IMA_StepTable[*stepIndex];
effdiff = (step >> 3);
if (diff >= step)
{
code |= 4;
diff -= step;
effdiff += step;
}
step >>= 1;
if (diff >= step)
{
code |= 2;
diff -= step;
effdiff += step;
}
step >>= 1;
if (diff >= step)
{
code |= 1;
effdiff += step;
}
if (code & 8) *sample -= effdiff;
else *sample += effdiff;
clamp_sample(sample);
*stepIndex += IMA_IndexTable[code];
clamp_step_index(stepIndex);
return code;
}
static void cvtSSima16K(PACMDRVSTREAMINSTANCE adsi,
const unsigned char* src, LPDWORD nsrc,
unsigned char* dst, LPDWORD ndst)
{
int i;
int sampleL, sampleR;
int stepIndexL, stepIndexR;
int nsamp_blk = ((LPIMAADPCMWAVEFORMAT)adsi->pwfxSrc)->wSamplesPerBlock;
int nsamp;
/* compute the number of entire blocks we can decode...
* it's the min of the number of entire blocks in source buffer and the number
* of entire blocks in destination buffer
*/
DWORD nblock = min(*nsrc / adsi->pwfxSrc->nBlockAlign,
*ndst / (nsamp_blk * 2 * 2));
*nsrc = nblock * adsi->pwfxSrc->nBlockAlign;
*ndst = nblock * (nsamp_blk * 2 * 2);
nsamp_blk--; /* remove the sample in block header */
for (; nblock > 0; nblock--)
{
const unsigned char* in_src = src;
/* handle headers first */
sampleL = R16(src);
stepIndexL = (unsigned)*(src + 2);
clamp_step_index(&stepIndexL);
src += 4;
W16(dst, sampleL); dst += 2;
sampleR = R16(src);
stepIndexR = (unsigned)*(src + 2);
clamp_step_index(&stepIndexR);
src += 4;
W16(dst, sampleR); dst += 2;
for (nsamp = nsamp_blk; nsamp > 0; nsamp -= 8)
{
for (i = 0; i < 4; i++)
{
process_nibble(*src, &stepIndexL, &sampleL);
W16(dst + (2 * i + 0) * 4 + 0, sampleL);
process_nibble(*src++ >> 4, &stepIndexL, &sampleL);
W16(dst + (2 * i + 1) * 4 + 0, sampleL);
}
for (i = 0; i < 4; i++)
{
process_nibble(*src , &stepIndexR, &sampleR);
W16(dst + (2 * i + 0) * 4 + 2, sampleR);
process_nibble(*src++ >>4, &stepIndexR, &sampleR);
W16(dst + (2 * i + 1) * 4 + 2, sampleR);
}
dst += 32;
}
/* we have now to realign the source pointer on block */
src = in_src + adsi->pwfxSrc->nBlockAlign;
}
}
static void cvtMMima16K(PACMDRVSTREAMINSTANCE adsi,
const unsigned char* src, LPDWORD nsrc,
unsigned char* dst, LPDWORD ndst)
{
int sample;
int stepIndex;
int nsamp_blk = ((LPIMAADPCMWAVEFORMAT)adsi->pwfxSrc)->wSamplesPerBlock;
int nsamp;
/* compute the number of entire blocks we can decode...
* it's the min of the number of entire blocks in source buffer and the number
* of entire blocks in destination buffer
*/
DWORD nblock = min(*nsrc / adsi->pwfxSrc->nBlockAlign,
*ndst / (nsamp_blk * 2));
*nsrc = nblock * adsi->pwfxSrc->nBlockAlign;
*ndst = nblock * nsamp_blk * 2;
nsamp_blk--; /* remove the sample in block header */
for (; nblock > 0; nblock--)
{
const unsigned char* in_src = src;
/* handle header first */
sample = R16(src);
stepIndex = (unsigned)*(src + 2);
clamp_step_index(&stepIndex);
src += 4;
W16(dst, sample); dst += 2;
for (nsamp = nsamp_blk; nsamp > 0; nsamp -= 2)
{
process_nibble(*src, &stepIndex, &sample);
W16(dst, sample); dst += 2;
process_nibble(*src++ >> 4, &stepIndex, &sample);
W16(dst, sample); dst += 2;
}
/* we have now to realign the source pointer on block */
src = in_src + adsi->pwfxSrc->nBlockAlign;
}
}
static void cvtSS16imaK(PACMDRVSTREAMINSTANCE adsi,
const unsigned char* src, LPDWORD nsrc,
unsigned char* dst, LPDWORD ndst)
{
int stepIndexL, stepIndexR;
int sampleL, sampleR;
BYTE code1, code2;
int nsamp_blk = ((LPIMAADPCMWAVEFORMAT)adsi->pwfxDst)->wSamplesPerBlock;
int i, nsamp;
/* compute the number of entire blocks we can decode...
* it's the min of the number of entire blocks in source buffer and the number
* of entire blocks in destination buffer
*/
DWORD nblock = min(*nsrc / (nsamp_blk * 2 * 2),
*ndst / adsi->pwfxDst->nBlockAlign);
*nsrc = nblock * (nsamp_blk * 2 * 2);
*ndst = nblock * adsi->pwfxDst->nBlockAlign;
stepIndexL = ((AcmAdpcmData*)adsi->dwDriver)->stepIndexL;
stepIndexR = ((AcmAdpcmData*)adsi->dwDriver)->stepIndexR;
nsamp_blk--; /* so that we won't count the sample in header while filling the block */
for (; nblock > 0; nblock--)
{
char* in_dst = dst;
/* generate header */
sampleL = R16(src); src += 2;
W16(dst, sampleL); dst += 2;
*dst = (unsigned char)(unsigned)stepIndexL;
dst += 2;
sampleR = R16(src); src += 2;
W16(dst, sampleR); dst += 2;
*dst = (unsigned char)(unsigned)stepIndexR;
dst += 2;
for (nsamp = nsamp_blk; nsamp > 0; nsamp -= 8)
{
for (i = 0; i < 4; i++)
{
code1 = generate_nibble(R16(src + (2 * i + 0) * 2 + 0),
&stepIndexL, &sampleL);
code2 = generate_nibble(R16(src + (2 * i + 1) * 2 + 0),
&stepIndexL, &sampleL);
*dst++ = (code1 << 4) | code2;
}
for (i = 0; i < 4; i++)
{
code1 = generate_nibble(R16(src + (2 * i + 0) * 2 + 1),
&stepIndexR, &sampleR);
code2 = generate_nibble(R16(src + (2 * i + 1) * 2 + 1),
&stepIndexR, &sampleR);
*dst++ = (code1 << 4) | code2;
}
src += 32;
}
dst = in_dst + adsi->pwfxDst->nBlockAlign;
}
((AcmAdpcmData*)adsi->dwDriver)->stepIndexL = stepIndexL;
((AcmAdpcmData*)adsi->dwDriver)->stepIndexR = stepIndexR;
}
static void cvtMM16imaK(PACMDRVSTREAMINSTANCE adsi,
const unsigned char* src, LPDWORD nsrc,
unsigned char* dst, LPDWORD ndst)
{
int stepIndex;
int sample;
BYTE code1, code2;
int nsamp_blk = ((LPIMAADPCMWAVEFORMAT)adsi->pwfxDst)->wSamplesPerBlock;
int nsamp;
/* compute the number of entire blocks we can decode...
* it's the min of the number of entire blocks in source buffer and the number
* of entire blocks in destination buffer
*/
DWORD nblock = min(*nsrc / (nsamp_blk * 2),
*ndst / adsi->pwfxDst->nBlockAlign);
*nsrc = nblock * (nsamp_blk * 2);
*ndst = nblock * adsi->pwfxDst->nBlockAlign;
stepIndex = ((AcmAdpcmData*)adsi->dwDriver)->stepIndexL;
nsamp_blk--; /* so that we won't count the sample in header while filling the block */
for (; nblock > 0; nblock--)
{
char* in_dst = dst;
/* generate header */
/* FIXME: what about the last effective sample from previous block ??? */
/* perhaps something like:
* sample += R16(src);
* clamp_sample(sample);
* and with :
* + saving the sample in adsi->dwDriver when all blocks are done
+ + reset should set the field in adsi->dwDriver to 0 too
*/
sample = R16(src); src += 2;
W16(dst, sample); dst += 2;
*dst = (unsigned char)(unsigned)stepIndex;
dst += 2;
for (nsamp = nsamp_blk; nsamp > 0; nsamp -= 2)
{
code1 = generate_nibble(R16(src), &stepIndex, &sample);
src += 2;
code2 = generate_nibble(R16(src), &stepIndex, &sample);
src += 2;
*dst++ = (code1 << 4) | code2;
}
dst = in_dst + adsi->pwfxDst->nBlockAlign;
}
((AcmAdpcmData*)adsi->dwDriver)->stepIndexL = stepIndex;
}
/***********************************************************************
* ADPCM_DriverDetails
*
*/
static LRESULT ADPCM_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_CODEC;
add->cFormatTags = 2; /* PCM, IMA ADPCM */
add->cFilterTags = 0;
add->hicon = NULL;
MultiByteToWideChar( CP_ACP, 0, "WINE-ADPCM", -1,
add->szShortName, sizeof(add->szShortName)/sizeof(WCHAR) );
MultiByteToWideChar( CP_ACP, 0, "Wine IMA ADPCM converter", -1,
add->szLongName, sizeof(add->szLongName)/sizeof(WCHAR) );
MultiByteToWideChar( CP_ACP, 0, "Brought to you by the Wine team...", -1,
add->szCopyright, sizeof(add->szCopyright)/sizeof(WCHAR) );
MultiByteToWideChar( CP_ACP, 0, "Refer to LICENSE file", -1,
add->szLicensing, sizeof(add->szLicensing)/sizeof(WCHAR) );
add->szFeatures[0] = 0;
return MMSYSERR_NOERROR;
}
/***********************************************************************
* ADPCM_FormatTagDetails
*
*/
static LRESULT ADPCM_FormatTagDetails(PACMFORMATTAGDETAILSW aftd, DWORD dwQuery)
{
static WCHAR szPcm[]={'P','C','M',0};
static WCHAR szImaAdPcm[]={'I','M','A',' ','A','d','P','C','M',0};
switch (dwQuery)
{
case ACM_FORMATTAGDETAILSF_INDEX:
if (aftd->dwFormatTagIndex >= 2) return ACMERR_NOTPOSSIBLE;
break;
case ACM_FORMATTAGDETAILSF_LARGESTSIZE:
if (aftd->dwFormatTag == WAVE_FORMAT_UNKNOWN)
{
aftd->dwFormatTagIndex = 1; /* WAVE_FORMAT_IMA_ADPCM is bigger than PCM */
break;
}
/* fall thru */
case ACM_FORMATTAGDETAILSF_FORMATTAG:
switch (aftd->dwFormatTag)
{
case WAVE_FORMAT_PCM: aftd->dwFormatTagIndex = 0; break;
case WAVE_FORMAT_IMA_ADPCM: aftd->dwFormatTagIndex = 1; break;
default: return ACMERR_NOTPOSSIBLE;
}
break;
default:
WARN("Unsupported query %08lx\n", dwQuery);
return MMSYSERR_NOTSUPPORTED;
}
aftd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
switch (aftd->dwFormatTagIndex)
{
case 0:
aftd->dwFormatTag = WAVE_FORMAT_PCM;
aftd->cbFormatSize = sizeof(PCMWAVEFORMAT);
aftd->cStandardFormats = NUM_PCM_FORMATS;
lstrcpyW(aftd->szFormatTag, szPcm);
break;
case 1:
aftd->dwFormatTag = WAVE_FORMAT_IMA_ADPCM;
aftd->cbFormatSize = sizeof(IMAADPCMWAVEFORMAT);
aftd->cStandardFormats = NUM_ADPCM_FORMATS;
lstrcpyW(aftd->szFormatTag, szImaAdPcm);
break;
}
return MMSYSERR_NOERROR;
}
/***********************************************************************
* ADPCM_FormatDetails
*
*/
static LRESULT ADPCM_FormatDetails(PACMFORMATDETAILSW afd, DWORD dwQuery)
{
switch (dwQuery)
{
case ACM_FORMATDETAILSF_FORMAT:
if (ADPCM_GetFormatIndex(afd->pwfx) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
break;
case ACM_FORMATDETAILSF_INDEX:
afd->pwfx->wFormatTag = afd->dwFormatTag;
switch (afd->dwFormatTag)
{
case WAVE_FORMAT_PCM:
if (afd->dwFormatIndex >= NUM_PCM_FORMATS) return ACMERR_NOTPOSSIBLE;
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;
case WAVE_FORMAT_IMA_ADPCM:
if (afd->dwFormatIndex >= NUM_ADPCM_FORMATS) return ACMERR_NOTPOSSIBLE;
afd->pwfx->nChannels = ADPCM_Formats[afd->dwFormatIndex].nChannels;
afd->pwfx->nSamplesPerSec = ADPCM_Formats[afd->dwFormatIndex].rate;
afd->pwfx->wBitsPerSample = ADPCM_Formats[afd->dwFormatIndex].nBits;
afd->pwfx->nBlockAlign = 1024;
/* we got 4 bits per sample */
afd->pwfx->nAvgBytesPerSec =
(afd->pwfx->nSamplesPerSec * 4) / 8;
if (afd->cbwfx >= sizeof(WAVEFORMATEX))
afd->pwfx->cbSize = sizeof(WORD);
if (afd->cbwfx >= sizeof(IMAADPCMWAVEFORMAT))
((IMAADPCMWAVEFORMAT*)afd->pwfx)->wSamplesPerBlock = (1024 - 4 * afd->pwfx->nChannels) * (2 / afd->pwfx->nChannels) + 1;
break;
default:
WARN("Unsupported tag %08lx\n", afd->dwFormatTag);
return MMSYSERR_INVALPARAM;
}
break;
default:
WARN("Unsupported query %08lx\n", dwQuery);
return MMSYSERR_NOTSUPPORTED;
}
afd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
afd->szFormat[0] = 0; /* let MSACM format this for us... */
return MMSYSERR_NOERROR;
}
/***********************************************************************
* ADPCM_FormatSuggest
*
*/
static LRESULT ADPCM_FormatSuggest(PACMDRVFORMATSUGGEST adfs)
{
/* some tests ... */
if (adfs->cbwfxSrc < sizeof(PCMWAVEFORMAT) ||
adfs->cbwfxDst < sizeof(PCMWAVEFORMAT) ||
ADPCM_GetFormatIndex(adfs->pwfxSrc) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
/* FIXME: should do those tests against the real size (according to format tag */
/* If no suggestion for destination, then copy source value */
if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NCHANNELS))
adfs->pwfxDst->nChannels = adfs->pwfxSrc->nChannels;
if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NSAMPLESPERSEC))
adfs->pwfxDst->nSamplesPerSec = adfs->pwfxSrc->nSamplesPerSec;
if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WBITSPERSAMPLE))
{
if (adfs->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM)
adfs->pwfxDst->wBitsPerSample = 4;
else
adfs->pwfxDst->wBitsPerSample = 16;
}
if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WFORMATTAG))
{
if (adfs->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM)
adfs->pwfxDst->wFormatTag = WAVE_FORMAT_IMA_ADPCM;
else
adfs->pwfxDst->wFormatTag = WAVE_FORMAT_PCM;
}
/* check if result is ok */
if (ADPCM_GetFormatIndex(adfs->pwfxDst) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
/* recompute other values */
switch (adfs->pwfxDst->wFormatTag)
{
case WAVE_FORMAT_PCM:
adfs->pwfxDst->nBlockAlign = (adfs->pwfxDst->nChannels * adfs->pwfxDst->wBitsPerSample) / 8;
adfs->pwfxDst->nAvgBytesPerSec = adfs->pwfxDst->nSamplesPerSec * adfs->pwfxDst->nBlockAlign;
break;
case WAVE_FORMAT_IMA_ADPCM:
adfs->pwfxDst->nBlockAlign = 1024;
/* FIXME: not handling header overhead */
adfs->pwfxDst->nAvgBytesPerSec = ((adfs->pwfxDst->nSamplesPerSec * 4) / 8) * adfs->pwfxSrc->nChannels;
((IMAADPCMWAVEFORMAT*)adfs->pwfxDst)->wSamplesPerBlock = (1024 - 4 * adfs->pwfxSrc->nChannels) * (2 / adfs->pwfxSrc->nChannels) + 1;
TRACE("setting spb=%u\n", ((IMAADPCMWAVEFORMAT*)adfs->pwfxDst)->wSamplesPerBlock);
break;
default:
FIXME("\n");
break;
}
return MMSYSERR_NOERROR;
}
/***********************************************************************
* ADPCM_Reset
*
*/
static void ADPCM_Reset(PACMDRVSTREAMINSTANCE adsi, AcmAdpcmData* aad)
{
aad->stepIndexL = aad->stepIndexR = 0;
}
/***********************************************************************
* ADPCM_StreamOpen
*
*/
static LRESULT ADPCM_StreamOpen(PACMDRVSTREAMINSTANCE adsi)
{
AcmAdpcmData* aad;
unsigned nspb;
assert(!(adsi->fdwOpen & ACM_STREAMOPENF_ASYNC));
if (ADPCM_GetFormatIndex(adsi->pwfxSrc) == 0xFFFFFFFF ||
ADPCM_GetFormatIndex(adsi->pwfxDst) == 0xFFFFFFFF)
return ACMERR_NOTPOSSIBLE;
aad = HeapAlloc(GetProcessHeap(), 0, sizeof(AcmAdpcmData));
if (aad == 0) return MMSYSERR_NOMEM;
adsi->dwDriver = (DWORD)aad;
if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
{
goto theEnd;
}
else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_IMA_ADPCM &&
adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
{
/* resampling or mono <=> stereo not available
* ADPCM algo only define 16 bit per sample output
*/
if (adsi->pwfxSrc->nSamplesPerSec != adsi->pwfxDst->nSamplesPerSec ||
adsi->pwfxSrc->nChannels != adsi->pwfxDst->nChannels ||
adsi->pwfxDst->wBitsPerSample != 16)
goto theEnd;
nspb = ((LPIMAADPCMWAVEFORMAT)adsi->pwfxSrc)->wSamplesPerBlock;
TRACE("spb=%u\n", nspb);
/* we check that in a block, after the header, samples are present on
* 4-sample packet pattern
* we also check that the block alignement is bigger than the expected size
*/
if (((nspb - 1) & 3) != 0) goto theEnd;
if ((((nspb - 1) / 2) + 4) * adsi->pwfxSrc->nChannels < adsi->pwfxSrc->nBlockAlign)
goto theEnd;
/* adpcm decoding... */
if (adsi->pwfxDst->wBitsPerSample == 16 && adsi->pwfxDst->nChannels == 2)
aad->convert = cvtSSima16K;
if (adsi->pwfxDst->wBitsPerSample == 16 && adsi->pwfxDst->nChannels == 1)
aad->convert = cvtMMima16K;
}
else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
adsi->pwfxDst->wFormatTag == WAVE_FORMAT_IMA_ADPCM)
{
if (adsi->pwfxSrc->nSamplesPerSec != adsi->pwfxDst->nSamplesPerSec ||
adsi->pwfxSrc->nChannels != adsi->pwfxDst->nChannels ||
adsi->pwfxSrc->wBitsPerSample != 16)
goto theEnd;
nspb = ((LPIMAADPCMWAVEFORMAT)adsi->pwfxDst)->wSamplesPerBlock;
TRACE("spb=%u\n", nspb);
/* we check that in a block, after the header, samples are present on
* 4-sample packet pattern
* we also check that the block alignement is bigger than the expected size
*/
if (((nspb - 1) & 3) != 0) goto theEnd;
if ((((nspb - 1) / 2) + 4) * adsi->pwfxDst->nChannels < adsi->pwfxDst->nBlockAlign)
goto theEnd;
/* adpcm coding... */
if (adsi->pwfxSrc->wBitsPerSample == 16 && adsi->pwfxSrc->nChannels == 2)
aad->convert = cvtSS16imaK;
if (adsi->pwfxSrc->wBitsPerSample == 16 && adsi->pwfxSrc->nChannels == 1)
aad->convert = cvtMM16imaK;
}
else goto theEnd;
ADPCM_Reset(adsi, aad);
return MMSYSERR_NOERROR;
theEnd:
HeapFree(GetProcessHeap(), 0, aad);
adsi->dwDriver = 0L;
return MMSYSERR_NOTSUPPORTED;
}
/***********************************************************************
* ADPCM_StreamClose
*
*/
static LRESULT ADPCM_StreamClose(PACMDRVSTREAMINSTANCE adsi)
{
HeapFree(GetProcessHeap(), 0, (void*)adsi->dwDriver);
return MMSYSERR_NOERROR;
}
/***********************************************************************
* ADPCM_round
*
*/
static inline DWORD ADPCM_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;
}
/***********************************************************************
* ADPCM_StreamSize
*
*/
static LRESULT ADPCM_StreamSize(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMSIZE adss)
{
switch (adss->fdwSize)
{
case ACM_STREAMSIZEF_DESTINATION:
/* cbDstLength => cbSrcLength */
if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
adsi->pwfxDst->wFormatTag == WAVE_FORMAT_IMA_ADPCM)
{
/* don't take block overhead into account, doesn't matter too much */
adss->cbSrcLength = adss->cbDstLength * 4;
}
else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_IMA_ADPCM &&
adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
{
FIXME("misses the block header overhead\n");
adss->cbSrcLength = 256 + adss->cbDstLength / 4;
}
else
{
return MMSYSERR_NOTSUPPORTED;
}
break;
case ACM_STREAMSIZEF_SOURCE:
/* cbSrcLength => cbDstLength */
if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
adsi->pwfxDst->wFormatTag == WAVE_FORMAT_IMA_ADPCM)
{
FIXME("misses the block header overhead\n");
adss->cbDstLength = 256 + adss->cbSrcLength / 4;
}
else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_IMA_ADPCM &&
adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
{
/* don't take block overhead into account, doesn't matter too much */
adss->cbDstLength = adss->cbSrcLength * 4;
}
else
{
return MMSYSERR_NOTSUPPORTED;
}
break;
default:
WARN("Unsupported query %08lx\n", adss->fdwSize);
return MMSYSERR_NOTSUPPORTED;
}
return MMSYSERR_NOERROR;
}
/***********************************************************************
* ADPCM_StreamConvert
*
*/
static LRESULT ADPCM_StreamConvert(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMHEADER adsh)
{
AcmAdpcmData* aad = (AcmAdpcmData*)adsi->dwDriver;
DWORD nsrc = adsh->cbSrcLength;
DWORD ndst = adsh->cbDstLength;
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))
{
ADPCM_Reset(adsi, aad);
}
aad->convert(adsi, adsh->pbSrc, &nsrc, adsh->pbDst, &ndst);
adsh->cbSrcLengthUsed = nsrc;
adsh->cbDstLengthUsed = ndst;
return MMSYSERR_NOERROR;
}
/**************************************************************************
* ADPCM_DriverProc [exported]
*/
LRESULT CALLBACK ADPCM_DriverProc(DWORD dwDevID, HDRVR hDriv, UINT wMsg,
LPARAM dwParam1, LPARAM dwParam2)
{
TRACE("(%08lx %08lx %04x %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 ADPCM_drvOpen((LPSTR)dwParam1);
case DRV_CLOSE: return ADPCM_drvClose(dwDevID);
case DRV_ENABLE: return 1;
case DRV_DISABLE: return 1;
case DRV_QUERYCONFIGURE: return 1;
case DRV_CONFIGURE: MessageBoxA(0, "MSACM IMA ADPCM 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 ADPCM_DriverDetails((PACMDRIVERDETAILSW)dwParam1);
case ACMDM_FORMATTAG_DETAILS:
return ADPCM_FormatTagDetails((PACMFORMATTAGDETAILSW)dwParam1, dwParam2);
case ACMDM_FORMAT_DETAILS:
return ADPCM_FormatDetails((PACMFORMATDETAILSW)dwParam1, dwParam2);
case ACMDM_FORMAT_SUGGEST:
return ADPCM_FormatSuggest((PACMDRVFORMATSUGGEST)dwParam1);
case ACMDM_STREAM_OPEN:
return ADPCM_StreamOpen((PACMDRVSTREAMINSTANCE)dwParam1);
case ACMDM_STREAM_CLOSE:
return ADPCM_StreamClose((PACMDRVSTREAMINSTANCE)dwParam1);
case ACMDM_STREAM_SIZE:
return ADPCM_StreamSize((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMSIZE)dwParam2);
case ACMDM_STREAM_CONVERT:
return ADPCM_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 */
return MMSYSERR_NOTSUPPORTED;
case ACMDM_STREAM_PREPARE:
case ACMDM_STREAM_UNPREPARE:
/* nothing special to do here... so don't do anything */
return MMSYSERR_NOERROR;
default:
return DefDriverProc(dwDevID, hDriv, wMsg, dwParam1, dwParam2);
}
return 0;
}
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