wavemap.c

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/* -*- tab-width: 8; c-basic-offset: 4 -*- */
/*
 * Wine Wave mapper driver
 *
 * Copyright    1999,2001 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */
 
/* TODOs
 *  + better protection against evilish dwUser parameters
 *  + use asynchronous ACM conversion
 *  + don't use callback functions when none is required in open
 *  + the buffer sizes may not be accurate, so there may be some
 *    remaining bytes in src and dst buffers after ACM conversions...
 *      those should be taken care of...
 */
 
#include <stdarg.h>
#include <string.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "mmddk.h"
#include "mmreg.h"
#include "msacm.h"
#include "wine/unicode.h"
#include "wine/debug.h"
 
WINE_DEFAULT_DEBUG_CHANNEL(wavemap);
 
typedef struct tagWAVEMAPDATA {
    struct tagWAVEMAPDATA*  self;
    union {
        struct {
            HWAVEOUT    hOuterWave;
            HWAVEOUT    hInnerWave;
        } out;
        struct {
            HWAVEIN hOuterWave;
            HWAVEIN hInnerWave;
        } in;
    } u;
    HACMSTREAM  hAcmStream;
    /* needed data to filter callbacks. Only needed when hAcmStream is not 0 */
    DWORD_PTR   dwCallback;
    DWORD_PTR   dwClientInstance;
    DWORD   dwFlags;
    /* ratio to compute position from a PCM playback to any format */
    DWORD       avgSpeedOuter;
    DWORD       avgSpeedInner;
    /* channel size of inner and outer */
    DWORD       nSamplesPerSecOuter;
    DWORD       nSamplesPerSecInner;
} WAVEMAPDATA;
 
static  BOOL    WAVEMAP_IsData(const WAVEMAPDATA* wm)
{
    return (!IsBadReadPtr(wm, sizeof(WAVEMAPDATA)) && wm->self == wm);
}
 
/*======================================================================*
 *                  WAVE OUT part                                       *
 *======================================================================*/
 
static void CALLBACK wodCallback(HWAVEOUT hWave, UINT uMsg, DWORD_PTR dwInstance,
                                 DWORD_PTR dwParam1, DWORD_PTR dwParam2)
{
    WAVEMAPDATA*    wom = (WAVEMAPDATA*)dwInstance;
 
    TRACE("(%p %u %ld %lx %lx);\n", hWave, uMsg, dwInstance, dwParam1, dwParam2);
 
    if (!WAVEMAP_IsData(wom)) {
    ERR("Bad data\n");
    return;
    }
 
    if (uMsg != WOM_OPEN && hWave != wom->u.out.hInnerWave)
    ERR("Shouldn't happen (%p %p)\n", hWave, wom->u.out.hInnerWave);
 
    switch (uMsg) {
    case WOM_OPEN:
    case WOM_CLOSE:
    /* dwParam1 & dwParam2 are supposed to be 0, nothing to do */
    break;
    case WOM_DONE:
    if (wom->hAcmStream) {
        LPWAVEHDR       lpWaveHdrDst = (LPWAVEHDR)dwParam1;
        PACMSTREAMHEADER    ash = (PACMSTREAMHEADER)((LPSTR)lpWaveHdrDst - sizeof(ACMSTREAMHEADER));
        LPWAVEHDR       lpWaveHdrSrc = (LPWAVEHDR)ash->dwUser;
 
        lpWaveHdrSrc->dwFlags &= ~WHDR_INQUEUE;
        lpWaveHdrSrc->dwFlags |= WHDR_DONE;
            dwParam1 = (DWORD_PTR)lpWaveHdrSrc;
    }
    break;
    default:
    ERR("Unknown msg %u\n", uMsg);
    }
 
    DriverCallback(wom->dwCallback, HIWORD(wom->dwFlags), (HDRVR)wom->u.out.hOuterWave,
           uMsg, wom->dwClientInstance, dwParam1, dwParam2);
}
 
/******************************************************************
 *      wodOpenHelper
 *
 *
 */
static  DWORD   wodOpenHelper(WAVEMAPDATA* wom, UINT idx,
                  LPWAVEOPENDESC lpDesc, LPWAVEFORMATEX lpwfx,
                  DWORD dwFlags)
{
    DWORD   ret;
 
    TRACE("(%p %04x %p %p %08x)\n", wom, idx, lpDesc, lpwfx, dwFlags);
 
    /* destination is always PCM, so the formulas below apply */
    lpwfx->nBlockAlign = (lpwfx->nChannels * lpwfx->wBitsPerSample) / 8;
    lpwfx->nAvgBytesPerSec = lpwfx->nSamplesPerSec * lpwfx->nBlockAlign;
    if (dwFlags & WAVE_FORMAT_QUERY) {
    ret = acmStreamOpen(NULL, 0, lpDesc->lpFormat, lpwfx, NULL, 0L, 0L, ACM_STREAMOPENF_QUERY);
    } else {
    ret = acmStreamOpen(&wom->hAcmStream, 0, lpDesc->lpFormat, lpwfx, NULL, 0L, 0L, 0L);
    }
    if (ret == MMSYSERR_NOERROR) {
        ret = waveOutOpen(&wom->u.out.hInnerWave, idx, lpwfx,
                          (DWORD_PTR)wodCallback, (DWORD_PTR)wom,
                          (dwFlags & ~CALLBACK_TYPEMASK) | CALLBACK_FUNCTION);
    if (ret != MMSYSERR_NOERROR && !(dwFlags & WAVE_FORMAT_QUERY)) {
        acmStreamClose(wom->hAcmStream, 0);
        wom->hAcmStream = 0;
    }
    }
    TRACE("ret = %08x\n", ret);
    return ret;
}
 
static  DWORD   wodOpen(DWORD_PTR *lpdwUser, LPWAVEOPENDESC lpDesc, DWORD dwFlags)
{
    UINT        ndlo, ndhi;
    UINT        i;
    WAVEMAPDATA*    wom = HeapAlloc(GetProcessHeap(), 0, sizeof(WAVEMAPDATA));
    DWORD               res;
 
    TRACE("(%p %p %08x)\n", lpdwUser, lpDesc, dwFlags);
 
    if (!wom) {
        WARN("no memory\n");
    return MMSYSERR_NOMEM;
    }
 
    ndhi = waveOutGetNumDevs();
    if (dwFlags & WAVE_MAPPED) {
    if (lpDesc->uMappedDeviceID >= ndhi) {
            WARN("invalid parameter: dwFlags WAVE_MAPPED\n");
            HeapFree(GetProcessHeap(), 0, wom);
            return MMSYSERR_INVALPARAM;
        }
    ndlo = lpDesc->uMappedDeviceID;
    ndhi = ndlo + 1;
    dwFlags &= ~WAVE_MAPPED;
    } else {
    ndlo = 0;
    }
    wom->self = wom;
    wom->dwCallback = lpDesc->dwCallback;
    wom->dwFlags = dwFlags;
    wom->dwClientInstance = lpDesc->dwInstance;
    wom->u.out.hOuterWave = (HWAVEOUT)lpDesc->hWave;
    wom->avgSpeedOuter = wom->avgSpeedInner = lpDesc->lpFormat->nAvgBytesPerSec;
    wom->nSamplesPerSecOuter = wom->nSamplesPerSecInner = lpDesc->lpFormat->nSamplesPerSec;
 
    for (i = ndlo; i < ndhi; i++) {
    /* if no ACM stuff is involved, no need to handle callbacks at this
     * level, this will be done transparently
     */
        if (waveOutOpen(&wom->u.out.hInnerWave, i, lpDesc->lpFormat,
                        (DWORD_PTR)wodCallback, (DWORD_PTR)wom,
                        (dwFlags & ~CALLBACK_TYPEMASK) | CALLBACK_FUNCTION | WAVE_FORMAT_DIRECT) == MMSYSERR_NOERROR) {
        wom->hAcmStream = 0;
        goto found;
    }
    }
 
    if ((dwFlags & WAVE_FORMAT_DIRECT) == 0) {
        WAVEFORMATEX    wfx;
 
        wfx.wFormatTag = WAVE_FORMAT_PCM;
        wfx.cbSize = 0; /* normally, this field is not used for PCM format, just in case */
        /* try some ACM stuff */
 
#define TRY(sps,bps)    wfx.nSamplesPerSec = (sps); wfx.wBitsPerSample = (bps); \
                        switch (res=wodOpenHelper(wom, i, lpDesc, &wfx, dwFlags | WAVE_FORMAT_DIRECT)) { \
                            case MMSYSERR_NOERROR: wom->avgSpeedInner = wfx.nAvgBytesPerSec; wom->nSamplesPerSecInner = wfx.nSamplesPerSec; goto found; \
                            case WAVERR_BADFORMAT: break; \
                            default: goto error; \
                        }
 
        if (lpDesc->lpFormat->wFormatTag != WAVE_FORMAT_PCM) {
            /* Format changed so keep sample rate and number of channels 
             * the same and just change the bit depth
             */
            for (i = ndlo; i < ndhi; i++) {
                wfx.nSamplesPerSec=lpDesc->lpFormat->nSamplesPerSec;
                wfx.nChannels = lpDesc->lpFormat->nChannels;
                TRY(wfx.nSamplesPerSec, 16);
                TRY(wfx.nSamplesPerSec, 8);
            }
        } else {
            /* Our resampling algorithm is quite primitive so first try
             * to just change the bit depth and number of channels
             */
            for (i = ndlo; i < ndhi; i++) {
                wfx.nSamplesPerSec=lpDesc->lpFormat->nSamplesPerSec;
                wfx.nChannels = lpDesc->lpFormat->nChannels;
                TRY(wfx.nSamplesPerSec, 16);
                TRY(wfx.nSamplesPerSec, 8);
                wfx.nChannels ^= 3;
                TRY(wfx.nSamplesPerSec, 16);
                TRY(wfx.nSamplesPerSec, 8);
            }
 
            for (i = ndlo; i < ndhi; i++) {
                /* first try with same stereo/mono option as source */
                wfx.nChannels = lpDesc->lpFormat->nChannels;
                TRY(96000, 16);
                TRY(48000, 16);
                TRY(44100, 16);
                TRY(22050, 16);
                TRY(11025, 16);
 
                /* 2^3 => 1, 1^3 => 2, so if stereo, try mono (and the other way around) */
                wfx.nChannels ^= 3;
                TRY(96000, 16);
                TRY(48000, 16);
                TRY(44100, 16);
                TRY(22050, 16);
                TRY(11025, 16);
 
                /* first try with same stereo/mono option as source */
                wfx.nChannels = lpDesc->lpFormat->nChannels;
                TRY(96000, 8);
                TRY(48000, 8);
                TRY(44100, 8);
                TRY(22050, 8);
                TRY(11025, 8);
 
                /* 2^3 => 1, 1^3 => 2, so if stereo, try mono (and the other way around) */
                wfx.nChannels ^= 3;
                TRY(96000, 8);
                TRY(48000, 8);
                TRY(44100, 8);
                TRY(22050, 8);
                TRY(11025, 8);
            }
        }
#undef TRY
    }
 
    HeapFree(GetProcessHeap(), 0, wom);
    WARN("ret = WAVERR_BADFORMAT\n");
    return WAVERR_BADFORMAT;
 
found:
    if (dwFlags & WAVE_FORMAT_QUERY) {
    *lpdwUser = 0L;
    HeapFree(GetProcessHeap(), 0, wom);
    } else {
        *lpdwUser = (DWORD_PTR)wom;
    }
    return MMSYSERR_NOERROR;
error:
    HeapFree(GetProcessHeap(), 0, wom);
    if (res==ACMERR_NOTPOSSIBLE) {
        WARN("ret = WAVERR_BADFORMAT\n");
        return WAVERR_BADFORMAT;
    }
    WARN("ret = 0x%08x\n", res);
    return res;
}
 
static  DWORD   wodClose(WAVEMAPDATA* wom)
{
    DWORD ret;
 
    TRACE("(%p)\n", wom);
 
    ret = waveOutClose(wom->u.out.hInnerWave);
    if (ret == MMSYSERR_NOERROR) {
    if (wom->hAcmStream) {
        ret = acmStreamClose(wom->hAcmStream, 0);
    }
    if (ret == MMSYSERR_NOERROR) {
        HeapFree(GetProcessHeap(), 0, wom);
    }
    }
    return ret;
}
 
static  DWORD   wodWrite(WAVEMAPDATA* wom, LPWAVEHDR lpWaveHdrSrc, DWORD dwParam2)
{
    PACMSTREAMHEADER    ash;
    LPWAVEHDR       lpWaveHdrDst;
 
    TRACE("(%p %p %08x)\n", wom, lpWaveHdrSrc, dwParam2);
 
    if (!wom->hAcmStream) {
    return waveOutWrite(wom->u.out.hInnerWave, lpWaveHdrSrc, dwParam2);
    }
 
    lpWaveHdrSrc->dwFlags |= WHDR_INQUEUE;
    ash = (PACMSTREAMHEADER)lpWaveHdrSrc->reserved;
    /* acmStreamConvert will actually check that the new size is less than initial size */
    ash->cbSrcLength = lpWaveHdrSrc->dwBufferLength;
    if (acmStreamConvert(wom->hAcmStream, ash, 0L) != MMSYSERR_NOERROR) {
        WARN("acmStreamConvert failed\n");
    return MMSYSERR_ERROR;
    }
 
    lpWaveHdrDst = (LPWAVEHDR)((LPSTR)ash + sizeof(ACMSTREAMHEADER));
    if (ash->cbSrcLength > ash->cbSrcLengthUsed)
        FIXME("Not all src buffer has been written, expect bogus sound\n");
    else if (ash->cbSrcLength < ash->cbSrcLengthUsed)
        ERR("Codec has read more data than it is allowed to\n");
 
    if (ash->cbDstLengthUsed == 0) {
        /* something went wrong in decoding */
        FIXME("Got 0 length\n");
        return MMSYSERR_ERROR;
    }
    lpWaveHdrDst->dwBufferLength = ash->cbDstLengthUsed;
    return waveOutWrite(wom->u.out.hInnerWave, lpWaveHdrDst, sizeof(*lpWaveHdrDst));
}
 
static  DWORD   wodPrepare(WAVEMAPDATA* wom, LPWAVEHDR lpWaveHdrSrc, DWORD dwParam2)
{
    PACMSTREAMHEADER    ash;
    DWORD       size;
    DWORD       dwRet;
    LPWAVEHDR       lpWaveHdrDst;
 
    TRACE("(%p %p %08x)\n", wom, lpWaveHdrSrc, dwParam2);
 
    if (!wom->hAcmStream)
    return waveOutPrepareHeader(wom->u.out.hInnerWave, lpWaveHdrSrc, dwParam2);
 
    if (acmStreamSize(wom->hAcmStream, lpWaveHdrSrc->dwBufferLength, &size, ACM_STREAMSIZEF_SOURCE) != MMSYSERR_NOERROR) {
        WARN("acmStreamSize failed\n");
    return MMSYSERR_ERROR;
    }
 
    ash = HeapAlloc(GetProcessHeap(), 0, sizeof(ACMSTREAMHEADER) + sizeof(WAVEHDR) + size);
    if (ash == NULL) {
        WARN("no memory\n");
    return MMSYSERR_NOMEM;
    }
 
    ash->cbStruct = sizeof(*ash);
    ash->fdwStatus = 0L;
    ash->dwUser = (DWORD_PTR)lpWaveHdrSrc;
    ash->pbSrc = (LPBYTE)lpWaveHdrSrc->lpData;
    ash->cbSrcLength = lpWaveHdrSrc->dwBufferLength;
    /* ash->cbSrcLengthUsed */
    ash->dwSrcUser = lpWaveHdrSrc->dwUser; /* FIXME ? */
    ash->pbDst = (LPBYTE)ash + sizeof(ACMSTREAMHEADER) + sizeof(WAVEHDR);
    ash->cbDstLength = size;
    /* ash->cbDstLengthUsed */
    ash->dwDstUser = 0; /* FIXME ? */
    dwRet = acmStreamPrepareHeader(wom->hAcmStream, ash, 0L);
    if (dwRet != MMSYSERR_NOERROR) {
        WARN("acmStreamPrepareHeader failed\n");
    goto errCleanUp;
    }
 
    lpWaveHdrDst = (LPWAVEHDR)((LPSTR)ash + sizeof(ACMSTREAMHEADER));
    lpWaveHdrDst->lpData = (LPSTR)ash->pbDst;
    lpWaveHdrDst->dwBufferLength = size; /* conversion is not done yet */
    lpWaveHdrDst->dwFlags = 0;
    lpWaveHdrDst->dwLoops = 0;
    dwRet = waveOutPrepareHeader(wom->u.out.hInnerWave, lpWaveHdrDst, sizeof(*lpWaveHdrDst));
    if (dwRet != MMSYSERR_NOERROR) {
        WARN("waveOutPrepareHeader failed\n");
    goto errCleanUp;
    }
 
    lpWaveHdrSrc->reserved = (DWORD_PTR)ash;
    lpWaveHdrSrc->dwFlags = WHDR_PREPARED;
    TRACE("=> (0)\n");
    return MMSYSERR_NOERROR;
errCleanUp:
    TRACE("=> (%d)\n", dwRet);
    HeapFree(GetProcessHeap(), 0, ash);
    return dwRet;
}
 
static  DWORD   wodUnprepare(WAVEMAPDATA* wom, LPWAVEHDR lpWaveHdrSrc, DWORD dwParam2)
{
    PACMSTREAMHEADER    ash;
    LPWAVEHDR       lpWaveHdrDst;
    DWORD       dwRet1, dwRet2;
 
    TRACE("(%p %p %08x)\n", wom, lpWaveHdrSrc, dwParam2);
 
    if (!wom->hAcmStream) {
    return waveOutUnprepareHeader(wom->u.out.hInnerWave, lpWaveHdrSrc, dwParam2);
    }
    ash = (PACMSTREAMHEADER)lpWaveHdrSrc->reserved;
    dwRet1 = acmStreamUnprepareHeader(wom->hAcmStream, ash, 0L);
 
    lpWaveHdrDst = (LPWAVEHDR)((LPSTR)ash + sizeof(ACMSTREAMHEADER));
    dwRet2 = waveOutUnprepareHeader(wom->u.out.hInnerWave, lpWaveHdrDst, sizeof(*lpWaveHdrDst));
 
    HeapFree(GetProcessHeap(), 0, ash);
 
    lpWaveHdrSrc->dwFlags &= ~WHDR_PREPARED;
    return (dwRet1 == MMSYSERR_NOERROR) ? dwRet2 : dwRet1;
}
 
static  DWORD   wodGetPosition(WAVEMAPDATA* wom, LPMMTIME lpTime, DWORD dwParam2)
{
    DWORD       val;
    MMTIME      timepos;
    TRACE("(%p %p %08x)\n", wom, lpTime, dwParam2);
 
    timepos = *lpTime;
 
    /* For TIME_MS, we're going to recalculate using TIME_BYTES */
    if (lpTime->wType == TIME_MS)
        timepos.wType = TIME_BYTES;
 
    /* This can change timepos.wType if the requested type is not supported */
    val = waveOutGetPosition(wom->u.out.hInnerWave, &timepos, dwParam2);
 
    if (timepos.wType == TIME_BYTES)
    {
        DWORD dwInnerSamplesPerOuter = wom->nSamplesPerSecInner / wom->nSamplesPerSecOuter;
        if (dwInnerSamplesPerOuter > 0)
        {
            DWORD dwInnerBytesPerSample = wom->avgSpeedInner / wom->nSamplesPerSecInner;
            DWORD dwInnerBytesPerOuterSample = dwInnerBytesPerSample * dwInnerSamplesPerOuter;
            DWORD remainder = 0;
 
            /* If we are up sampling (going from lower sample rate to higher),
            **   we need to make a special accommodation for times when we've
            **   written a partial output sample.  This happens frequently
            **   to us because we use msacm to do our up sampling, and it
            **   will up sample on an unaligned basis.
            ** For example, if you convert a 2 byte wide 8,000 'outer'
            **   buffer to a 2 byte wide 48,000 inner device, you would
            **   expect 2 bytes of input to produce 12 bytes of output.
            **   Instead, msacm will produce 8 bytes of output.
            **   But reporting our position as 1 byte of output is
            **   nonsensical; the output buffer position needs to be
            **   aligned on outer sample size, and aggressively rounded up.
            */
            remainder = timepos.u.cb % dwInnerBytesPerOuterSample;
            if (remainder > 0)
            {
                timepos.u.cb -= remainder;
                timepos.u.cb += dwInnerBytesPerOuterSample;
            }
        }
 
        lpTime->u.cb = MulDiv(timepos.u.cb, wom->avgSpeedOuter, wom->avgSpeedInner);
 
        /* Once we have the TIME_BYTES right, we can easily convert to TIME_MS */
        if (lpTime->wType == TIME_MS)
            lpTime->u.ms = MulDiv(lpTime->u.cb, 1000, wom->avgSpeedOuter);
        else
            lpTime->wType = TIME_BYTES;
    }
    else if (lpTime->wType == TIME_SAMPLES && timepos.wType == TIME_SAMPLES)
        lpTime->u.sample = MulDiv(timepos.u.sample, wom->nSamplesPerSecOuter, wom->nSamplesPerSecInner);
    else
        /* other time types don't require conversion */
        lpTime->u = timepos.u;
 
    return val;
}
 
static  DWORD   wodGetDevCaps(UINT wDevID, WAVEMAPDATA* wom, LPWAVEOUTCAPSW lpWaveCaps, DWORD dwParam2)
{
    static const WCHAR name[] = {'W','i','n','e',' ','w','a','v','e',' ','o','u','t',' ','m','a','p','p','e','r',0};
 
    TRACE("(%04x %p %p %08x)\n",wDevID, wom, lpWaveCaps, dwParam2);
 
    /* if opened low driver, forward message */
    if (WAVEMAP_IsData(wom))
        return waveOutGetDevCapsW((UINT_PTR)wom->u.out.hInnerWave, lpWaveCaps, dwParam2);
    /* else if no drivers, nothing to map so return bad device */
    if (waveOutGetNumDevs() == 0) {
        WARN("bad device id\n");
        return MMSYSERR_BADDEVICEID;
    }
    /* otherwise, return caps of mapper itself */
    if (wDevID == (UINT)-1 || wDevID == (UINT16)-1) {
    WAVEOUTCAPSW woc;
    woc.wMid = 0x00FF;
    woc.wPid = 0x0001;
    woc.vDriverVersion = 0x0332;
    lstrcpyW(woc.szPname, name);
    woc.dwFormats =
            WAVE_FORMAT_96M08 | WAVE_FORMAT_96S08 | WAVE_FORMAT_96M16 | WAVE_FORMAT_96S16 |
            WAVE_FORMAT_48M08 | WAVE_FORMAT_48S08 | WAVE_FORMAT_48M16 | WAVE_FORMAT_48S16 |
        WAVE_FORMAT_4M08 | WAVE_FORMAT_4S08 | WAVE_FORMAT_4M16 | WAVE_FORMAT_4S16 |
        WAVE_FORMAT_2M08 | WAVE_FORMAT_2S08 | WAVE_FORMAT_2M16 | WAVE_FORMAT_2S16 |
        WAVE_FORMAT_1M08 | WAVE_FORMAT_1S08 | WAVE_FORMAT_1M16 | WAVE_FORMAT_1S16;
    woc.wChannels = 2;
    woc.wReserved1 = 0;
    woc.dwSupport = WAVECAPS_VOLUME | WAVECAPS_LRVOLUME;
        memcpy(lpWaveCaps, &woc, min(dwParam2, sizeof(woc)));
 
    return MMSYSERR_NOERROR;
    }
    ERR("This shouldn't happen\n");
    return MMSYSERR_ERROR;
}
 
static  DWORD   wodGetVolume(UINT wDevID, WAVEMAPDATA* wom, LPDWORD lpVol)
{
    TRACE("(%04x %p %p)\n",wDevID, wom, lpVol);
 
    if (WAVEMAP_IsData(wom))
    return waveOutGetVolume(wom->u.out.hInnerWave, lpVol);
    return MMSYSERR_NOERROR;
}
 
static  DWORD   wodSetVolume(UINT wDevID, WAVEMAPDATA* wom, DWORD vol)
{
    TRACE("(%04x %p %08x)\n",wDevID, wom, vol);
 
    if (WAVEMAP_IsData(wom))
    return waveOutSetVolume(wom->u.out.hInnerWave, vol);
    return MMSYSERR_NOERROR;
}
 
static  DWORD   wodPause(WAVEMAPDATA* wom)
{
    TRACE("(%p)\n",wom);
 
    return waveOutPause(wom->u.out.hInnerWave);
}
 
static  DWORD   wodRestart(WAVEMAPDATA* wom)
{
    TRACE("(%p)\n",wom);
 
    return waveOutRestart(wom->u.out.hInnerWave);
}
 
static  DWORD   wodReset(WAVEMAPDATA* wom)
{
    TRACE("(%p)\n",wom);
 
    return waveOutReset(wom->u.out.hInnerWave);
}
 
static  DWORD   wodBreakLoop(WAVEMAPDATA* wom)
{
    TRACE("(%p)\n",wom);
 
    return waveOutBreakLoop(wom->u.out.hInnerWave);
}
 
static  DWORD   wodMapperStatus(WAVEMAPDATA* wom, DWORD flags, LPVOID ptr)
{
    UINT    id;
    DWORD   ret = MMSYSERR_NOTSUPPORTED;
 
    TRACE("(%p %08x %p)\n",wom, flags, ptr);
 
    switch (flags) {
    case WAVEOUT_MAPPER_STATUS_DEVICE:
    ret = waveOutGetID(wom->u.out.hInnerWave, &id);
    *(LPDWORD)ptr = id;
    break;
    case WAVEOUT_MAPPER_STATUS_MAPPED:
    FIXME("Unsupported flag=%d\n", flags);
    *(LPDWORD)ptr = 0; /* FIXME ?? */
    break;
    case WAVEOUT_MAPPER_STATUS_FORMAT:
    FIXME("Unsupported flag=%d\n", flags);
    /* ptr points to a WAVEFORMATEX struct - before or after streaming ? */
    *(LPDWORD)ptr = 0;
    break;
    default:
    FIXME("Unsupported flag=%d\n", flags);
    *(LPDWORD)ptr = 0;
    break;
    }
    return ret;
}
 
static  DWORD   wodMapperReconfigure(WAVEMAPDATA* wom, DWORD dwParam1, DWORD dwParam2)
{
    FIXME("(%p %08x %08x) stub!\n", wom, dwParam1, dwParam2);
 
    return MMSYSERR_NOERROR;
}
 
/**************************************************************************
 *              wodMessage (MSACM.@)
 */
DWORD WINAPI WAVEMAP_wodMessage(UINT wDevID, UINT wMsg, DWORD_PTR dwUser,
                                DWORD_PTR dwParam1, DWORD_PTR dwParam2)
{
    TRACE("(%u, %04X, %08lX, %08lX, %08lX);\n",
      wDevID, wMsg, dwUser, dwParam1, dwParam2);
 
    switch (wMsg) {
    case DRVM_INIT:
    case DRVM_EXIT:
    case DRVM_ENABLE:
    case DRVM_DISABLE:
    /* FIXME: Pretend this is supported */
    return 0;
    case WODM_OPEN:     return wodOpen      ((DWORD_PTR*)dwUser,      (LPWAVEOPENDESC)dwParam1,dwParam2);
    case WODM_CLOSE:        return wodClose     ((WAVEMAPDATA*)dwUser);
    case WODM_WRITE:        return wodWrite     ((WAVEMAPDATA*)dwUser, (LPWAVEHDR)dwParam1, dwParam2);
    case WODM_PAUSE:        return wodPause     ((WAVEMAPDATA*)dwUser);
    case WODM_GETPOS:       return wodGetPosition   ((WAVEMAPDATA*)dwUser, (LPMMTIME)dwParam1,  dwParam2);
    case WODM_BREAKLOOP:    return wodBreakLoop ((WAVEMAPDATA*)dwUser);
    case WODM_PREPARE:      return wodPrepare   ((WAVEMAPDATA*)dwUser, (LPWAVEHDR)dwParam1,     dwParam2);
    case WODM_UNPREPARE:    return wodUnprepare ((WAVEMAPDATA*)dwUser, (LPWAVEHDR)dwParam1,     dwParam2);
    case WODM_GETDEVCAPS:   return wodGetDevCaps    (wDevID, (WAVEMAPDATA*)dwUser, (LPWAVEOUTCAPSW)dwParam1,dwParam2);
    case WODM_GETNUMDEVS:   return 1;
    case WODM_GETPITCH:     return MMSYSERR_NOTSUPPORTED;
    case WODM_SETPITCH:     return MMSYSERR_NOTSUPPORTED;
    case WODM_GETPLAYBACKRATE:  return MMSYSERR_NOTSUPPORTED;
    case WODM_SETPLAYBACKRATE:  return MMSYSERR_NOTSUPPORTED;
    case WODM_GETVOLUME:    return wodGetVolume (wDevID, (WAVEMAPDATA*)dwUser, (LPDWORD)dwParam1);
    case WODM_SETVOLUME:    return wodSetVolume (wDevID, (WAVEMAPDATA*)dwUser, dwParam1);
    case WODM_RESTART:      return wodRestart   ((WAVEMAPDATA*)dwUser);
    case WODM_RESET:        return wodReset     ((WAVEMAPDATA*)dwUser);
    case WODM_MAPPER_STATUS:    return wodMapperStatus  ((WAVEMAPDATA*)dwUser, dwParam1, (LPVOID)dwParam2);
    case DRVM_MAPPER_RECONFIGURE: return wodMapperReconfigure((WAVEMAPDATA*)dwUser, dwParam1, dwParam2);
    /* known but not supported */
    case DRV_QUERYDEVICEINTERFACESIZE:
    case DRV_QUERYDEVICEINTERFACE:
        return MMSYSERR_NOTSUPPORTED;
    default:
    FIXME("unknown message %d!\n", wMsg);
    }
    return MMSYSERR_NOTSUPPORTED;
}
 
/*======================================================================*
 *                  WAVE IN part                                        *
 *======================================================================*/
 
static void CALLBACK widCallback(HWAVEIN hWave, UINT uMsg, DWORD_PTR dwInstance,
                                 DWORD_PTR dwParam1, DWORD_PTR dwParam2)
{
    WAVEMAPDATA* wim = (WAVEMAPDATA*)dwInstance;
 
    TRACE("(%p %u %lx %lx %lx);\n", hWave, uMsg, dwInstance, dwParam1, dwParam2);
 
    if (!WAVEMAP_IsData(wim)) {
    ERR("Bad data\n");
    return;
    }
 
    if (uMsg != WIM_OPEN && hWave != wim->u.in.hInnerWave)
    ERR("Shouldn't happen (%p %p)\n", hWave, wim->u.in.hInnerWave);
 
    switch (uMsg) {
    case WIM_OPEN:
    case WIM_CLOSE:
    /* dwParam1 & dwParam2 are supposed to be 0, nothing to do */
    break;
    case WIM_DATA:
    if (wim->hAcmStream) {
        LPWAVEHDR       lpWaveHdrSrc = (LPWAVEHDR)dwParam1;
        PACMSTREAMHEADER    ash = (PACMSTREAMHEADER)((LPSTR)lpWaveHdrSrc - sizeof(ACMSTREAMHEADER));
        LPWAVEHDR       lpWaveHdrDst = (LPWAVEHDR)ash->dwUser;
 
        /* convert data just gotten from waveIn into requested format */
        if (acmStreamConvert(wim->hAcmStream, ash, 0L) != MMSYSERR_NOERROR) {
        ERR("ACM conversion failed\n");
        return;
        } else {
        TRACE("Converted %d bytes into %d\n", ash->cbSrcLengthUsed, ash->cbDstLengthUsed);
        }
        /* and setup the wavehdr to return accordingly */
        lpWaveHdrDst->dwFlags &= ~WHDR_INQUEUE;
        lpWaveHdrDst->dwFlags |= WHDR_DONE;
        lpWaveHdrDst->dwBytesRecorded = ash->cbDstLengthUsed;
            dwParam1 = (DWORD_PTR)lpWaveHdrDst;
    }
    break;
    default:
    ERR("Unknown msg %u\n", uMsg);
    }
 
    DriverCallback(wim->dwCallback, HIWORD(wim->dwFlags), (HDRVR)wim->u.in.hOuterWave,
           uMsg, wim->dwClientInstance, dwParam1, dwParam2);
}
 
static  DWORD   widOpenHelper(WAVEMAPDATA* wim, UINT idx,
                  LPWAVEOPENDESC lpDesc, LPWAVEFORMATEX lpwfx,
                  DWORD dwFlags)
{
    DWORD   ret;
 
    TRACE("(%p %04x %p %p %08x)\n", wim, idx, lpDesc, lpwfx, dwFlags);
 
    /* source is always PCM, so the formulas below apply */
    lpwfx->nBlockAlign = (lpwfx->nChannels * lpwfx->wBitsPerSample) / 8;
    lpwfx->nAvgBytesPerSec = lpwfx->nSamplesPerSec * lpwfx->nBlockAlign;
    if (dwFlags & WAVE_FORMAT_QUERY) {
    ret = acmStreamOpen(NULL, 0, lpwfx, lpDesc->lpFormat, NULL, 0L, 0L, ACM_STREAMOPENF_QUERY);
    } else {
    ret = acmStreamOpen(&wim->hAcmStream, 0, lpwfx, lpDesc->lpFormat, NULL, 0L, 0L, 0L);
    }
    if (ret == MMSYSERR_NOERROR) {
        ret = waveInOpen(&wim->u.in.hInnerWave, idx, lpwfx,
                         (DWORD_PTR)widCallback, (DWORD_PTR)wim,
                         (dwFlags & ~CALLBACK_TYPEMASK) | CALLBACK_FUNCTION);
    if (ret != MMSYSERR_NOERROR && !(dwFlags & WAVE_FORMAT_QUERY)) {
        acmStreamClose(wim->hAcmStream, 0);
        wim->hAcmStream = 0;
    }
    }
    TRACE("ret = %08x\n", ret);
    return ret;
}
 
static  DWORD   widOpen(DWORD_PTR *lpdwUser, LPWAVEOPENDESC lpDesc, DWORD dwFlags)
{
    UINT        ndlo, ndhi;
    UINT        i;
    WAVEMAPDATA*    wim = HeapAlloc(GetProcessHeap(), 0, sizeof(WAVEMAPDATA));
    DWORD               res;
 
    TRACE("(%p %p %08x)\n", lpdwUser, lpDesc, dwFlags);
 
    if (!wim) {
        WARN("no memory\n");
    return MMSYSERR_NOMEM;
    }
 
    wim->self = wim;
    wim->dwCallback = lpDesc->dwCallback;
    wim->dwFlags = dwFlags;
    wim->dwClientInstance = lpDesc->dwInstance;
    wim->u.in.hOuterWave = (HWAVEIN)lpDesc->hWave;
 
    ndhi = waveInGetNumDevs();
    if (dwFlags & WAVE_MAPPED) {
    if (lpDesc->uMappedDeviceID >= ndhi) return MMSYSERR_INVALPARAM;
    ndlo = lpDesc->uMappedDeviceID;
    ndhi = ndlo + 1;
    dwFlags &= ~WAVE_MAPPED;
    } else {
    ndlo = 0;
    }
 
    wim->avgSpeedOuter = wim->avgSpeedInner = lpDesc->lpFormat->nAvgBytesPerSec;
    wim->nSamplesPerSecOuter = wim->nSamplesPerSecInner = lpDesc->lpFormat->nSamplesPerSec;
 
    for (i = ndlo; i < ndhi; i++) {
        if (waveInOpen(&wim->u.in.hInnerWave, i, lpDesc->lpFormat,
                       (DWORD_PTR)widCallback, (DWORD_PTR)wim,
                       (dwFlags & ~CALLBACK_TYPEMASK) | CALLBACK_FUNCTION | WAVE_FORMAT_DIRECT) == MMSYSERR_NOERROR) {
        wim->hAcmStream = 0;
        goto found;
    }
    }
 
    if ((dwFlags & WAVE_FORMAT_DIRECT) == 0)
    {
        WAVEFORMATEX    wfx;
 
        wfx.wFormatTag = WAVE_FORMAT_PCM;
        wfx.cbSize = 0; /* normally, this field is not used for PCM format, just in case */
        /* try some ACM stuff */
 
#define TRY(sps,bps)    wfx.nSamplesPerSec = (sps); wfx.wBitsPerSample = (bps); \
                        switch (res=widOpenHelper(wim, i, lpDesc, &wfx, dwFlags | WAVE_FORMAT_DIRECT)) { \
                        case MMSYSERR_NOERROR: wim->avgSpeedInner = wfx.nAvgBytesPerSec; wim->nSamplesPerSecInner = wfx.nSamplesPerSec; goto found; \
                        case WAVERR_BADFORMAT: break; \
                        default: goto error; \
                        }
 
        for (i = ndlo; i < ndhi; i++) {
        wfx.nSamplesPerSec=lpDesc->lpFormat->nSamplesPerSec;
            /* first try with same stereo/mono option as source */
            wfx.nChannels = lpDesc->lpFormat->nChannels;
            TRY(wfx.nSamplesPerSec, 16);
            TRY(wfx.nSamplesPerSec, 8);
            wfx.nChannels ^= 3;
            TRY(wfx.nSamplesPerSec, 16);
            TRY(wfx.nSamplesPerSec, 8);
    }
 
        for (i = ndlo; i < ndhi; i++) {
        wfx.nSamplesPerSec=lpDesc->lpFormat->nSamplesPerSec;
            /* first try with same stereo/mono option as source */
            wfx.nChannels = lpDesc->lpFormat->nChannels;
            TRY(96000, 16);
            TRY(48000, 16);
            TRY(44100, 16);
            TRY(22050, 16);
            TRY(11025, 16);
 
            /* 2^3 => 1, 1^3 => 2, so if stereo, try mono (and the other way around) */
            wfx.nChannels ^= 3;
            TRY(96000, 16);
            TRY(48000, 16);
            TRY(44100, 16);
            TRY(22050, 16);
            TRY(11025, 16);
 
            /* first try with same stereo/mono option as source */
            wfx.nChannels = lpDesc->lpFormat->nChannels;
            TRY(96000, 8);
            TRY(48000, 8);
            TRY(44100, 8);
            TRY(22050, 8);
            TRY(11025, 8);
 
            /* 2^3 => 1, 1^3 => 2, so if stereo, try mono (and the other way around) */
            wfx.nChannels ^= 3;
            TRY(96000, 8);
            TRY(48000, 8);
            TRY(44100, 8);
            TRY(22050, 8);
            TRY(11025, 8);
        }
#undef TRY
    }
 
    HeapFree(GetProcessHeap(), 0, wim);
    WARN("ret = WAVERR_BADFORMAT\n");
    return WAVERR_BADFORMAT;
found:
    if (dwFlags & WAVE_FORMAT_QUERY) {
    *lpdwUser = 0L;
    HeapFree(GetProcessHeap(), 0, wim);
    } else {
        *lpdwUser = (DWORD_PTR)wim;
        TRACE("Ok (stream=%p)\n", wim->hAcmStream);
    }
    return MMSYSERR_NOERROR;
error:
    HeapFree(GetProcessHeap(), 0, wim);
    if (res==ACMERR_NOTPOSSIBLE) {
        WARN("ret = WAVERR_BADFORMAT\n");
        return WAVERR_BADFORMAT;
    }
    WARN("ret = 0x%08x\n", res);
    return res;
}
 
static  DWORD   widClose(WAVEMAPDATA* wim)
{
    DWORD ret;
 
    TRACE("(%p)\n", wim);
 
    ret = waveInClose(wim->u.in.hInnerWave);
    if (ret == MMSYSERR_NOERROR) {
    if (wim->hAcmStream) {
        ret = acmStreamClose(wim->hAcmStream, 0);
    }
    if (ret == MMSYSERR_NOERROR) {
        HeapFree(GetProcessHeap(), 0, wim);
    }
    }
    return ret;
}
 
static  DWORD   widAddBuffer(WAVEMAPDATA* wim, LPWAVEHDR lpWaveHdrDst, DWORD dwParam2)
{
    PACMSTREAMHEADER    ash;
    LPWAVEHDR       lpWaveHdrSrc;
 
    TRACE("(%p %p %08x)\n", wim, lpWaveHdrDst, dwParam2);
 
    if (!wim->hAcmStream) {
    return waveInAddBuffer(wim->u.in.hInnerWave, lpWaveHdrDst, dwParam2);
    }
 
    lpWaveHdrDst->dwFlags |= WHDR_INQUEUE;
    ash = (PACMSTREAMHEADER)lpWaveHdrDst->reserved;
 
    lpWaveHdrSrc = (LPWAVEHDR)((LPSTR)ash + sizeof(ACMSTREAMHEADER));
    return waveInAddBuffer(wim->u.in.hInnerWave, lpWaveHdrSrc, sizeof(*lpWaveHdrSrc));
}
 
static  DWORD   widPrepare(WAVEMAPDATA* wim, LPWAVEHDR lpWaveHdrDst, DWORD dwParam2)
{
    PACMSTREAMHEADER    ash;
    DWORD       size;
    DWORD       dwRet;
    LPWAVEHDR       lpWaveHdrSrc;
 
    TRACE("(%p %p %08x)\n", wim, lpWaveHdrDst, dwParam2);
 
    if (!wim->hAcmStream) {
    return waveInPrepareHeader(wim->u.in.hInnerWave, lpWaveHdrDst, dwParam2);
    }
    if (acmStreamSize(wim->hAcmStream, lpWaveHdrDst->dwBufferLength, &size,
              ACM_STREAMSIZEF_DESTINATION) != MMSYSERR_NOERROR) {
        WARN("acmStreamSize failed\n");
    return MMSYSERR_ERROR;
    }
 
    ash = HeapAlloc(GetProcessHeap(), 0, sizeof(ACMSTREAMHEADER) + sizeof(WAVEHDR) + size);
    if (ash == NULL) {
        WARN("no memory\n");
    return MMSYSERR_NOMEM;
    }
 
    ash->cbStruct = sizeof(*ash);
    ash->fdwStatus = 0L;
    ash->dwUser = (DWORD_PTR)lpWaveHdrDst;
    ash->pbSrc = (LPBYTE)ash + sizeof(ACMSTREAMHEADER) + sizeof(WAVEHDR);
    ash->cbSrcLength = size;
    /* ash->cbSrcLengthUsed */
    ash->dwSrcUser = 0L; /* FIXME ? */
    ash->pbDst = (LPBYTE)lpWaveHdrDst->lpData;
    ash->cbDstLength = lpWaveHdrDst->dwBufferLength;
    /* ash->cbDstLengthUsed */
    ash->dwDstUser = lpWaveHdrDst->dwUser; /* FIXME ? */
    dwRet = acmStreamPrepareHeader(wim->hAcmStream, ash, 0L);
    if (dwRet != MMSYSERR_NOERROR) {
        WARN("acmStreamPrepareHeader failed\n");
    goto errCleanUp;
    }
 
    lpWaveHdrSrc = (LPWAVEHDR)((LPSTR)ash + sizeof(ACMSTREAMHEADER));
    lpWaveHdrSrc->lpData = (LPSTR)ash->pbSrc;
    lpWaveHdrSrc->dwBufferLength = size; /* conversion is not done yet */
    lpWaveHdrSrc->dwFlags = 0;
    lpWaveHdrSrc->dwLoops = 0;
    dwRet = waveInPrepareHeader(wim->u.in.hInnerWave, lpWaveHdrSrc, sizeof(*lpWaveHdrSrc));
    if (dwRet != MMSYSERR_NOERROR) {
        WARN("waveInPrepareHeader failed\n");
    goto errCleanUp;
    }
 
    lpWaveHdrDst->reserved = (DWORD_PTR)ash;
    lpWaveHdrDst->dwFlags = WHDR_PREPARED;
    TRACE("=> (0)\n");
    return MMSYSERR_NOERROR;
errCleanUp:
    TRACE("=> (%d)\n", dwRet);
    HeapFree(GetProcessHeap(), 0, ash);
    return dwRet;
}
 
static  DWORD   widUnprepare(WAVEMAPDATA* wim, LPWAVEHDR lpWaveHdrDst, DWORD dwParam2)
{
    PACMSTREAMHEADER    ash;
    LPWAVEHDR       lpWaveHdrSrc;
    DWORD       dwRet1, dwRet2;
 
    TRACE("(%p %p %08x)\n", wim, lpWaveHdrDst, dwParam2);
 
    if (!wim->hAcmStream) {
    return waveInUnprepareHeader(wim->u.in.hInnerWave, lpWaveHdrDst, dwParam2);
    }
    ash = (PACMSTREAMHEADER)lpWaveHdrDst->reserved;
    dwRet1 = acmStreamUnprepareHeader(wim->hAcmStream, ash, 0L);
 
    lpWaveHdrSrc = (LPWAVEHDR)((LPSTR)ash + sizeof(ACMSTREAMHEADER));
    dwRet2 = waveInUnprepareHeader(wim->u.in.hInnerWave, lpWaveHdrSrc, sizeof(*lpWaveHdrSrc));
 
    HeapFree(GetProcessHeap(), 0, ash);
 
    lpWaveHdrDst->dwFlags &= ~WHDR_PREPARED;
    return (dwRet1 == MMSYSERR_NOERROR) ? dwRet2 : dwRet1;
}
 
static  DWORD   widGetPosition(WAVEMAPDATA* wim, LPMMTIME lpTime, DWORD dwParam2)
{
    DWORD       val;
    MMTIME      timepos;
    TRACE("(%p %p %08x)\n", wim, lpTime, dwParam2);
 
    timepos = *lpTime;
 
    /* For TIME_MS, we're going to recalculate using TIME_BYTES */
    if (lpTime->wType == TIME_MS)
        timepos.wType = TIME_BYTES;
 
    /* This can change timepos.wType if the requested type is not supported */
    val = waveInGetPosition(wim->u.in.hInnerWave, &timepos, dwParam2);
 
    if (timepos.wType == TIME_BYTES)
    {
        DWORD dwInnerSamplesPerOuter = wim->nSamplesPerSecInner / wim->nSamplesPerSecOuter;
        if (dwInnerSamplesPerOuter > 0)
        {
            DWORD dwInnerBytesPerSample = wim->avgSpeedInner / wim->nSamplesPerSecInner;
            DWORD dwInnerBytesPerOuterSample = dwInnerBytesPerSample * dwInnerSamplesPerOuter;
            DWORD remainder = 0;
 
            /* If we are up sampling (going from lower sample rate to higher),
            **   we need to make a special accommodation for times when we've
            **   written a partial output sample.  This happens frequently
            **   to us because we use msacm to do our up sampling, and it
            **   will up sample on an unaligned basis.
            ** For example, if you convert a 2 byte wide 8,000 'outer'
            **   buffer to a 2 byte wide 48,000 inner device, you would
            **   expect 2 bytes of input to produce 12 bytes of output.
            **   Instead, msacm will produce 8 bytes of output.
            **   But reporting our position as 1 byte of output is
            **   nonsensical; the output buffer position needs to be
            **   aligned on outer sample size, and aggressively rounded up.
            */
            remainder = timepos.u.cb % dwInnerBytesPerOuterSample;
            if (remainder > 0)
            {
                timepos.u.cb -= remainder;
                timepos.u.cb += dwInnerBytesPerOuterSample;
            }
        }
 
        lpTime->u.cb = MulDiv(timepos.u.cb, wim->avgSpeedOuter, wim->avgSpeedInner);
 
        /* Once we have the TIME_BYTES right, we can easily convert to TIME_MS */
        if (lpTime->wType == TIME_MS)
            lpTime->u.ms = MulDiv(lpTime->u.cb, 1000, wim->avgSpeedOuter);
        else
            lpTime->wType = TIME_BYTES;
    }
    else if (lpTime->wType == TIME_SAMPLES && timepos.wType == TIME_SAMPLES)
        lpTime->u.sample = MulDiv(timepos.u.sample, wim->nSamplesPerSecOuter, wim->nSamplesPerSecInner);
    else
        /* other time types don't require conversion */
        lpTime->u = timepos.u;
 
    return val;
}
 
static  DWORD   widGetDevCaps(UINT wDevID, WAVEMAPDATA* wim, LPWAVEINCAPSW lpWaveCaps, DWORD dwParam2)
{
    TRACE("(%04x, %p %p %08x)\n", wDevID, wim, lpWaveCaps, dwParam2);
 
    /* if opened low driver, forward message */
    if (WAVEMAP_IsData(wim))
        return waveInGetDevCapsW((UINT_PTR)wim->u.in.hInnerWave, lpWaveCaps, dwParam2);
    /* else if no drivers, nothing to map so return bad device */
    if (waveInGetNumDevs() == 0) {
        WARN("bad device id\n");
        return MMSYSERR_BADDEVICEID;
    }
    /* otherwise, return caps of mapper itself */
    if (wDevID == (UINT)-1 || wDevID == (UINT16)-1) {
        WAVEINCAPSW wic;
        static const WCHAR init[] = {'W','i','n','e',' ','w','a','v','e',' ','i','n',' ','m','a','p','p','e','r',0};
    wic.wMid = 0x00FF;
    wic.wPid = 0x0001;
    wic.vDriverVersion = 0x0001;
    strcpyW(wic.szPname, init);
    wic.dwFormats =
            WAVE_FORMAT_96M08 | WAVE_FORMAT_96S08 | WAVE_FORMAT_96M16 | WAVE_FORMAT_96S16 |
            WAVE_FORMAT_48M08 | WAVE_FORMAT_48S08 | WAVE_FORMAT_48M16 | WAVE_FORMAT_48S16 |
        WAVE_FORMAT_4M08 | WAVE_FORMAT_4S08 | WAVE_FORMAT_4M16 | WAVE_FORMAT_4S16 |
        WAVE_FORMAT_2M08 | WAVE_FORMAT_2S08 | WAVE_FORMAT_2M16 | WAVE_FORMAT_2S16 |
        WAVE_FORMAT_1M08 | WAVE_FORMAT_1S08 | WAVE_FORMAT_1M16 | WAVE_FORMAT_1S16;
    wic.wChannels = 2;
    wic.wReserved1 = 0;
        memcpy(lpWaveCaps, &wic, min(dwParam2, sizeof(wic)));
 
    return MMSYSERR_NOERROR;
    }
    ERR("This shouldn't happen\n");
    return MMSYSERR_ERROR;
}
 
static  DWORD   widStop(WAVEMAPDATA* wim)
{
    TRACE("(%p)\n", wim);
 
    return waveInStop(wim->u.in.hInnerWave);
}
 
static  DWORD   widStart(WAVEMAPDATA* wim)
{
    TRACE("(%p)\n", wim);
 
    return waveInStart(wim->u.in.hInnerWave);
}
 
static  DWORD   widReset(WAVEMAPDATA* wim)
{
    TRACE("(%p)\n", wim);
 
    return waveInReset(wim->u.in.hInnerWave);
}
 
static  DWORD   widMapperStatus(WAVEMAPDATA* wim, DWORD flags, LPVOID ptr)
{
    UINT    id;
    DWORD   ret = MMSYSERR_NOTSUPPORTED;
 
    TRACE("(%p %08x %p)\n", wim, flags, ptr);
 
    switch (flags) {
    case WAVEIN_MAPPER_STATUS_DEVICE:
    ret = waveInGetID(wim->u.in.hInnerWave, &id);
    *(LPDWORD)ptr = id;
    break;
    case WAVEIN_MAPPER_STATUS_MAPPED:
    FIXME("Unsupported yet flag=%d\n", flags);
    *(LPDWORD)ptr = 0; /* FIXME ?? */
    break;
    case WAVEIN_MAPPER_STATUS_FORMAT:
    FIXME("Unsupported flag=%d\n", flags);
    /* ptr points to a WAVEFORMATEX struct  - before or after streaming ? */
    *(LPDWORD)ptr = 0; /* FIXME ?? */
    break;
    default:
    FIXME("Unsupported flag=%d\n", flags);
    *(LPDWORD)ptr = 0;
    break;
    }
    return ret;
}
 
static  DWORD   widMapperReconfigure(WAVEMAPDATA* wim, DWORD dwParam1, DWORD dwParam2)
{
    FIXME("(%p %08x %08x) stub!\n", wim, dwParam1, dwParam2);
 
    return MMSYSERR_NOERROR;
}
 
/**************************************************************************
 *              widMessage (MSACM.@)
 */
DWORD WINAPI WAVEMAP_widMessage(WORD wDevID, WORD wMsg, DWORD_PTR dwUser,
                                DWORD_PTR dwParam1, DWORD_PTR dwParam2)
{
    TRACE("(%u, %04X, %08lX, %08lX, %08lX);\n",
      wDevID, wMsg, dwUser, dwParam1, dwParam2);
 
    switch (wMsg) {
    case DRVM_INIT:
    case DRVM_EXIT:
    case DRVM_ENABLE:
    case DRVM_DISABLE:
    /* FIXME: Pretend this is supported */
    return 0;
 
    case WIDM_OPEN:     return widOpen          ((DWORD_PTR*)dwUser,     (LPWAVEOPENDESC)dwParam1, dwParam2);
    case WIDM_CLOSE:        return widClose         ((WAVEMAPDATA*)dwUser);
 
    case WIDM_ADDBUFFER:    return widAddBuffer     ((WAVEMAPDATA*)dwUser, (LPWAVEHDR)dwParam1,     dwParam2);
    case WIDM_PREPARE:      return widPrepare       ((WAVEMAPDATA*)dwUser, (LPWAVEHDR)dwParam1,     dwParam2);
    case WIDM_UNPREPARE:    return widUnprepare     ((WAVEMAPDATA*)dwUser, (LPWAVEHDR)dwParam1,     dwParam2);
    case WIDM_GETDEVCAPS:   return widGetDevCaps    (wDevID, (WAVEMAPDATA*)dwUser, (LPWAVEINCAPSW)dwParam1, dwParam2);
    case WIDM_GETNUMDEVS:   return 1;
    case WIDM_GETPOS:       return widGetPosition   ((WAVEMAPDATA*)dwUser, (LPMMTIME)dwParam1,  dwParam2);
    case WIDM_RESET:        return widReset         ((WAVEMAPDATA*)dwUser);
    case WIDM_START:        return widStart         ((WAVEMAPDATA*)dwUser);
    case WIDM_STOP:     return widStop          ((WAVEMAPDATA*)dwUser);
    case WIDM_MAPPER_STATUS:    return widMapperStatus  ((WAVEMAPDATA*)dwUser, dwParam1, (LPVOID)dwParam2);
    case DRVM_MAPPER_RECONFIGURE: return widMapperReconfigure((WAVEMAPDATA*)dwUser, dwParam1, dwParam2);
    /* known but not supported */
    case DRV_QUERYDEVICEINTERFACESIZE:
    case DRV_QUERYDEVICEINTERFACE:
        return MMSYSERR_NOTSUPPORTED;
    default:
    FIXME("unknown message %u!\n", wMsg);
    }
    return MMSYSERR_NOTSUPPORTED;
}
 
/*======================================================================*
 *                  Driver part                                         *
 *======================================================================*/
 
static  struct WINE_WAVEMAP* oss = NULL;
 
/**************************************************************************
 *              WAVEMAP_drvOpen         [internal]
 */
static LRESULT WAVEMAP_drvOpen(LPSTR str)
{
    TRACE("(%p)\n", str);
 
    if (oss)
    return 0;
 
    /* I know, this is ugly, but who cares... */
    oss = (struct WINE_WAVEMAP*)1;
    return 1;
}
 
/**************************************************************************
 *              WAVEMAP_drvClose        [internal]
 */
static LRESULT WAVEMAP_drvClose(DWORD_PTR dwDevID)
{
    TRACE("(%08lx)\n", dwDevID);
 
    if (oss) {
    oss = NULL;
    return 1;
    }
    return 0;
}
 
/**************************************************************************
 *              DriverProc (MSACM.@)
 */
LRESULT CALLBACK WAVEMAP_DriverProc(DWORD_PTR dwDevID, HDRVR hDriv, UINT wMsg,
                                    LPARAM dwParam1, LPARAM dwParam2)
{
    TRACE("(%08lX, %p, %08X, %08lX, %08lX)\n",
      dwDevID, hDriv, wMsg, dwParam1, dwParam2);
 
    switch(wMsg) {
    case DRV_LOAD:      return 1;
    case DRV_FREE:      return 1;
    case DRV_OPEN:      return WAVEMAP_drvOpen((LPSTR)dwParam1);
    case DRV_CLOSE:     return WAVEMAP_drvClose(dwDevID);
    case DRV_ENABLE:        return 1;
    case DRV_DISABLE:       return 1;
    case DRV_QUERYCONFIGURE:    return 1;
    case DRV_CONFIGURE:     MessageBoxA(0, "WAVEMAP MultiMedia Driver !", "Wave mapper Driver", MB_OK); return 1;
    case DRV_INSTALL:       return DRVCNF_RESTART;
    case DRV_REMOVE:        return DRVCNF_RESTART;
    default:
    return DefDriverProc(dwDevID, hDriv, wMsg, dwParam1, dwParam2);
    }
}