Added wave-in support and fixed a few bugs in the wave-out code.

[wine/multimedia.git] / dlls / winmm / winearts / audio.c

/* -*- tab-width: 8; c-basic-offset: 4 -*- */
/*
 * Wine Driver for aRts Sound Server
 *   http://www.arts-project.org
 *
 * Copyright 1994 Martin Ayotte
 *           1999 Eric Pouech (async playing in waveOut/waveIn)
 *           2000 Eric Pouech (loops in waveOut)
 *           2002 Chris Morgan (aRts version of this file)
 *
 * 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
 */
/* NOTE:
 *    with arts we cannot stop the audio that is already in
 *    the servers buffer, so to reduce delays during starting
 *    and stoppping of audio streams adjust the
 *    audio buffer size in the kde control center or in the
 *    artsd startup script
 *
 * FIXME:
 *      pause in waveOut does not work correctly in loop mode
 *
 *      does something need to be done in for WaveIn DirectSound?
 */

/*#define EMULATE_SB16*/

#include "config.h"

#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <fcntl.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winerror.h"
#include "wine/winuser16.h"
#include "mmddk.h"
#include "dsound.h"
#include "dsdriver.h"
#include "arts.h"
#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(wave);

#ifdef HAVE_ARTS

#include <artsc.h>

/* The following four #defines allow you to fine-tune the packet
 * settings in arts for better low-latency support. You must also
 * adjust the latency in the KDE arts control panel. I recommend 4
 * fragments, 1024 bytes.
 *
 * The following is from the ARTS documentation and explains what CCCC
 * and SSSS mean:
 * 
 * @li ARTS_P_PACKET_SETTINGS (rw) This is a way to configure packet
 * size & packet count at the same time.  The format is 0xCCCCSSSS,
 * where 2^SSSS is the packet size, and CCCC is the packet count. Note
 * that when writing this, you don't necessarily get the settings you
 * requested.
 */
#define WAVEOUT_PACKET_CCCC 0x000C
#define WAVEOUT_PACKET_SSSS 0x0008
#define WAVEIN_PACKET_CCCC  0x000C
#define WAVEIN_PACKET_SSSS  0x0008

#define BUFFER_REFILL_THRESHOLD 4

#define WAVEOUT_PACKET_SETTINGS ((WAVEOUT_PACKET_CCCC << 16) | (WAVEOUT_PACKET_SSSS))
#define WAVEIN_PACKET_SETTINGS  ((WAVEIN_PACKET_CCCC << 16) | (WAVEIN_PACKET_SSSS))

#define MAX_WAVEOUTDRV  (10)
#define MAX_WAVEINDRV   (10)

/* state diagram for waveOut writing:
 *
 * +---------+-------------+---------------+---------------------------------+
 * |  state  |  function   |     event     |            new state            |
 * +---------+-------------+---------------+---------------------------------+
 * |         | open()      |               | STOPPED                         |
 * | PAUSED  | write()     |               | PAUSED                          |
 * | STOPPED | write()     | <thrd create> | PLAYING                         |
 * | PLAYING | write()     | HEADER        | PLAYING                         |
 * | (other) | write()     | <error>       |                                 |
 * | (any)   | pause()     | PAUSING       | PAUSED                          |
 * | PAUSED  | restart()   | RESTARTING    | PLAYING (if no thrd => STOPPED) |
 * | (any)   | reset()     | RESETTING     | STOPPED                         |
 * | (any)   | close()     | CLOSING       | CLOSED                          |
 * +---------+-------------+---------------+---------------------------------+
 */

/* states of the playing device */
#define WINE_WS_PLAYING         0
#define WINE_WS_PAUSED          1
#define WINE_WS_STOPPED         2
#define WINE_WS_CLOSED          3

/* events to be send to device */
enum win_wm_message {
    WINE_WM_PAUSING = WM_USER + 1, WINE_WM_RESTARTING, WINE_WM_RESETTING, WINE_WM_HEADER,
    WINE_WM_UPDATE, WINE_WM_BREAKLOOP, WINE_WM_CLOSING, WINE_WM_STARTING, WINE_WM_STOPPING
};

typedef struct {
    enum win_wm_message         msg;    /* message identifier */
    DWORD                       param;  /* parameter for this message */
    HANDLE                      hEvent; /* if message is synchronous, handle of event for synchro */
} RING_MSG;

/* implement an in-process message ring for better performance
 * (compared to passing thru the server)
 * this ring will be used by the input (resp output) record (resp playback) routine
 */
#define ARTS_RING_BUFFER_INCREMENT      64
typedef struct {
    RING_MSG                    * messages;
    int                         ring_buffer_size;
    int                         msg_tosave;
    int                         msg_toget;
    HANDLE                      msg_event;
    CRITICAL_SECTION            msg_crst;
} ARTS_MSG_RING;

typedef struct {
    volatile int                state;                  /* one of the WINE_WS_ manifest constants */
    WAVEOPENDESC                waveDesc;
    WORD                        wFlags;
    PCMWAVEFORMAT               format;
    WAVEOUTCAPSA                caps;

    DWORD                       dwSleepTime;            /* Num of milliseconds to sleep between filling the dsp buffers */

    /* arts information */
    arts_stream_t               play_stream;            /* the stream structure we get from arts when opening a stream for playing */
    DWORD                       dwBufferSize;           /* size of whole buffer in bytes */
    int                         packetSettings;

    char*                       sound_buffer;
    long                        buffer_size;

    DWORD                       volume_left;            /* volume control information */
    DWORD                       volume_right;

    LPWAVEHDR                   lpQueuePtr;             /* start of queued WAVEHDRs (waiting to be notified) */
    LPWAVEHDR                   lpPlayPtr;              /* start of not yet fully played buffers */
    DWORD                       dwPartialOffset;        /* Offset of not yet written bytes in lpPlayPtr */

    LPWAVEHDR                   lpLoopPtr;              /* pointer of first buffer in loop, if any */
    DWORD                       dwLoops;                /* private copy of loop counter */

    DWORD                       dwPlayedTotal;          /* number of bytes actually played since opening */
    DWORD                       dwWrittenTotal;         /* number of bytes written to the audio device since opening */

    /* synchronization stuff */
    HANDLE                      hStartUpEvent;
    HANDLE                      hThread;
    DWORD                       dwThreadID;
    ARTS_MSG_RING               msgRing;
} WINE_WAVEOUT;

typedef struct {
    volatile int                state;                  /* one of the WINE_WS_ manifest constants */
    WAVEOPENDESC                waveDesc;
    WORD                        wFlags;
    PCMWAVEFORMAT               format;
    WAVEINCAPSA                 caps;

    /* arts information */
    arts_stream_t               record_stream;          /* the stream structure we get from arts when opening a stream for recording */
    int                         packetSettings;

    LPWAVEHDR                   lpQueuePtr;
    DWORD                       dwRecordedTotal;

    /* synchronization stuff */
    HANDLE                      hStartUpEvent;
    HANDLE                      hThread;
    DWORD                       dwThreadID;
    ARTS_MSG_RING               msgRing;
} WINE_WAVEIN;

static WINE_WAVEOUT     WOutDev   [MAX_WAVEOUTDRV];
static WINE_WAVEIN      WInDev    [MAX_WAVEINDRV];

static DWORD wodDsCreate(UINT wDevID, PIDSDRIVER* drv);
static DWORD wodDsDesc(UINT wDevID, PDSDRIVERDESC desc);
static DWORD wodDsGuid(UINT wDevID, LPGUID pGuid);

/* These strings used only for tracing */
static const char *wodPlayerCmdString[] = {
    "WINE_WM_PAUSING",
    "WINE_WM_RESTARTING",
    "WINE_WM_RESETTING",
    "WINE_WM_HEADER",
    "WINE_WM_UPDATE",
    "WINE_WM_BREAKLOOP",
    "WINE_WM_CLOSING",
    "WINE_WM_STARTING",
    "WINE_WM_STOPPING",
};

/*======================================================================*
 *                  Low level WAVE implementation                       *
 *======================================================================*/

/* Volume functions derived from Alsaplayer source */
/* length is the number of 16 bit samples */
void volume_effect16(void *bufin, void* bufout, int length, int left,
                int right, int  nChannels)
{
  short *d_out = (short *)bufout;
  short *d_in = (short *)bufin;
  int i, v;

/*
  TRACE("length == %d, nChannels == %d\n", length, nChannels);
*/

  if (right == -1) right = left;

  for(i = 0; i < length; i+=(nChannels))
  {
    v = (int) ((*(d_in++) * left) / 100);
    *(d_out++) = (v>32767) ? 32767 : ((v<-32768) ? -32768 : v);
    if(nChannels == 2)
    {
      v = (int) ((*(d_in++) * right) / 100);
      *(d_out++) = (v>32767) ? 32767 : ((v<-32768) ? -32768 : v);
    }
  }
}

/* length is the number of 8 bit samples */
void volume_effect8(void *bufin, void* bufout, int length, int left,
                int right, int  nChannels)
{
  BYTE *d_out = (BYTE *)bufout;
  BYTE *d_in = (BYTE *)bufin;
  int i, v;

/*
  TRACE("length == %d, nChannels == %d\n", length, nChannels);
*/

  if (right == -1) right = left;

  for(i = 0; i < length; i+=(nChannels))
  {
    v = (BYTE) ((*(d_in++) * left) / 100);
    *(d_out++) = (v>255) ? 255 : ((v<0) ? 0 : v);
    if(nChannels == 2)
    {
      v = (BYTE) ((*(d_in++) * right) / 100);
      *(d_out++) = (v>255) ? 255 : ((v<0) ? 0 : v);
    }
  }
}

/******************************************************************
 *              ARTS_CloseWaveOutDevice
 *
 */
void            ARTS_CloseWaveOutDevice(WINE_WAVEOUT* wwo)
{
  arts_close_stream(wwo->play_stream);  /* close the arts stream */
  wwo->play_stream = (arts_stream_t*)-1;

  /* free up the buffer we use for volume and reset the size */
  if(wwo->sound_buffer)
  {
    HeapFree(GetProcessHeap(), 0, wwo->sound_buffer);
    wwo->sound_buffer = NULL;
  }

  wwo->buffer_size = 0;
}

/******************************************************************
 *              ARTS_CloseWaveInDevice
 *
 */
void            ARTS_CloseWaveInDevice(WINE_WAVEIN* wwi)
{
  arts_close_stream(wwi->record_stream);        /* close the arts stream */
  wwi->record_stream = (arts_stream_t*)-1;
}

/******************************************************************
 *              ARTS_Init
 */
static int      ARTS_Init(void)
{
  return arts_init();  /* initialize arts and return errorcode */
}

/******************************************************************
 *              ARTS_WaveClose
 */
LONG            ARTS_WaveClose(void)
{
    int iDevice;

    /* close all open devices */
    for(iDevice = 0; iDevice < MAX_WAVEOUTDRV; iDevice++)
    {
      if(WOutDev[iDevice].play_stream != (arts_stream_t*)-1)
      {
        ARTS_CloseWaveOutDevice(&WOutDev[iDevice]);
      }
    }

    for(iDevice = 0; iDevice < MAX_WAVEINDRV; iDevice++)
    {
      if(WInDev[iDevice].record_stream != (arts_stream_t*)-1)
      {
        ARTS_CloseWaveInDevice(&WInDev[iDevice]);
      }
    }

    arts_free();    /* free up arts */
    return 1;
}

/******************************************************************
 *              ARTS_WaveInit
 *
 * Initialize internal structures from ARTS server info
 */
LONG ARTS_WaveInit(void)
{
    int         i;
    int         errorcode;

    TRACE("called\n");

    if ((errorcode = ARTS_Init()) < 0)
    {
        ERR("arts_init() failed (%d)\n", errorcode);
        return -1;
    }

    /* initialize all device handles to -1 */
    for (i = 0; i < MAX_WAVEOUTDRV; ++i)
    {
        WOutDev[i].play_stream = (arts_stream_t*)-1;
        memset(&WOutDev[i].caps, 0, sizeof(WOutDev[i].caps)); /* zero out
                                                        caps values */
    /* FIXME: some programs compare this string against the content of the registry
     * for MM drivers. The names have to match in order for the program to work
     * (e.g. MS win9x mplayer.exe)
     */
#ifdef EMULATE_SB16
        WOutDev[i].caps.wMid = 0x0002;
        WOutDev[i].caps.wPid = 0x0104;
        strcpy(WOutDev[i].caps.szPname, "SB16 Wave Out");
#else
        WOutDev[i].caps.wMid = 0x00FF;  /* Manufac ID */
        WOutDev[i].caps.wPid = 0x0001;  /* Product ID */
    /*    strcpy(WOutDev[i].caps.szPname, "OpenSoundSystem WAVOUT Driver");*/
        strcpy(WOutDev[i].caps.szPname, "CS4236/37/38");
#endif
        WOutDev[i].caps.vDriverVersion = 0x0100;
        WOutDev[i].caps.dwFormats = 0x00000000;
        WOutDev[i].caps.dwSupport = WAVECAPS_VOLUME;

        WOutDev[i].caps.wChannels = 2;
        WOutDev[i].caps.dwSupport |= WAVECAPS_LRVOLUME;

        WOutDev[i].caps.dwFormats |= WAVE_FORMAT_4M08;
        WOutDev[i].caps.dwFormats |= WAVE_FORMAT_4S08;
        WOutDev[i].caps.dwFormats |= WAVE_FORMAT_4S16;
        WOutDev[i].caps.dwFormats |= WAVE_FORMAT_4M16;
        WOutDev[i].caps.dwFormats |= WAVE_FORMAT_2M08;
        WOutDev[i].caps.dwFormats |= WAVE_FORMAT_2S08;
        WOutDev[i].caps.dwFormats |= WAVE_FORMAT_2M16;
        WOutDev[i].caps.dwFormats |= WAVE_FORMAT_2S16;
        WOutDev[i].caps.dwFormats |= WAVE_FORMAT_1M08;
        WOutDev[i].caps.dwFormats |= WAVE_FORMAT_1S08;
        WOutDev[i].caps.dwFormats |= WAVE_FORMAT_1M16;
        WOutDev[i].caps.dwFormats |= WAVE_FORMAT_1S16;
    }

    for (i = 0; i < MAX_WAVEINDRV; ++i)
    {
        WInDev[i].record_stream = (arts_stream_t*)-1;
        memset(&WInDev[i].caps, 0, sizeof(WInDev[i].caps)); /* zero out
                                                        caps values */
    /* FIXME: some programs compare this string against the content of the registry
     * for MM drivers. The names have to match in order for the program to work
     * (e.g. MS win9x mplayer.exe)
     */
#ifdef EMULATE_SB16
        WInDev[i].caps.wMid = 0x0002;
        WInDev[i].caps.wPid = 0x0104;
        strcpy(WInDev[i].caps.szPname, "SB16 Wave In");
#else
        WInDev[i].caps.wMid = 0x00FF;
        WInDev[i].caps.wPid = 0x0001;
        strcpy(WInDev[i].caps.szPname,"CS4236/37/38");
#endif
        WInDev[i].caps.vDriverVersion = 0x0100;
        WInDev[i].caps.dwFormats = 0x00000000;

        WInDev[i].caps.wChannels = 2;

        WInDev[i].caps.dwFormats |= WAVE_FORMAT_4M08;
        WInDev[i].caps.dwFormats |= WAVE_FORMAT_4S08;
        WInDev[i].caps.dwFormats |= WAVE_FORMAT_4S16;
        WInDev[i].caps.dwFormats |= WAVE_FORMAT_4M16;
        WInDev[i].caps.dwFormats |= WAVE_FORMAT_2M08;
        WInDev[i].caps.dwFormats |= WAVE_FORMAT_2S08;
        WInDev[i].caps.dwFormats |= WAVE_FORMAT_2M16;
        WInDev[i].caps.dwFormats |= WAVE_FORMAT_2S16;
        WInDev[i].caps.dwFormats |= WAVE_FORMAT_1M08;
        WInDev[i].caps.dwFormats |= WAVE_FORMAT_1S08;
        WInDev[i].caps.dwFormats |= WAVE_FORMAT_1M16;
        WInDev[i].caps.dwFormats |= WAVE_FORMAT_1S16;

        WInDev[i].caps.wReserved1 = 0;
    }
    return 0;
}

/******************************************************************
 *              ARTS_InitRingMessage
 *
 * Initialize the ring of messages for passing between driver's caller and playback/record
 * thread
 */
static int ARTS_InitRingMessage(ARTS_MSG_RING* mr)
{
    mr->msg_toget = 0;
    mr->msg_tosave = 0;
    mr->msg_event = CreateEventA(NULL, FALSE, FALSE, NULL);
    mr->ring_buffer_size = ARTS_RING_BUFFER_INCREMENT;
    mr->messages = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,mr->ring_buffer_size * sizeof(RING_MSG));
    InitializeCriticalSection(&mr->msg_crst);
    return 0;
}

/******************************************************************
 *              ARTS_DestroyRingMessage
 *
 */
static int ARTS_DestroyRingMessage(ARTS_MSG_RING* mr)
{
    CloseHandle(mr->msg_event);
    HeapFree(GetProcessHeap(),0,mr->messages);
    mr->messages=NULL;
    DeleteCriticalSection(&mr->msg_crst);
    return 0;
}

/******************************************************************
 *              ARTS_AddRingMessage
 *
 * Inserts a new message into the ring (should be called from DriverProc derivated routines)
 */
static int ARTS_AddRingMessage(ARTS_MSG_RING* mr, enum win_wm_message msg, DWORD param, BOOL wait)
{
    HANDLE      hEvent = INVALID_HANDLE_VALUE;

    EnterCriticalSection(&mr->msg_crst);
    if ((mr->msg_toget == ((mr->msg_tosave + 1) % mr->ring_buffer_size)))
    {
        int old_ring_buffer_size = mr->ring_buffer_size;
        mr->ring_buffer_size += ARTS_RING_BUFFER_INCREMENT;
        TRACE("mr->ring_buffer_size=%d\n",mr->ring_buffer_size);
        mr->messages = HeapReAlloc(GetProcessHeap(),0,mr->messages, mr->ring_buffer_size * sizeof(RING_MSG));
        /* Now we need to rearrange the ring buffer so that the new
           buffers just allocated are in between mr->msg_tosave and
           mr->msg_toget.
        */
        if (mr->msg_tosave < mr->msg_toget)
        {
            memmove(&(mr->messages[mr->msg_toget + ARTS_RING_BUFFER_INCREMENT]),
                    &(mr->messages[mr->msg_toget]),
                    sizeof(RING_MSG)*(old_ring_buffer_size - mr->msg_toget)
                    );
            mr->msg_toget += ARTS_RING_BUFFER_INCREMENT;
        }
    }
    if (wait)
    {
        hEvent = CreateEventA(NULL, FALSE, FALSE, NULL);
        if (hEvent == INVALID_HANDLE_VALUE)
        {
            ERR("can't create event !?\n");
            LeaveCriticalSection(&mr->msg_crst);
            return 0;
        }
        if (mr->msg_toget != mr->msg_tosave && mr->messages[mr->msg_toget].msg != WINE_WM_HEADER)
            FIXME("two fast messages in the queue!!!!\n");

        /* fast messages have to be added at the start of the queue */
        mr->msg_toget = (mr->msg_toget + mr->ring_buffer_size - 1) % mr->ring_buffer_size;

        mr->messages[mr->msg_toget].msg = msg;
        mr->messages[mr->msg_toget].param = param;
        mr->messages[mr->msg_toget].hEvent = hEvent;
    }
    else
    {
        mr->messages[mr->msg_tosave].msg = msg;
        mr->messages[mr->msg_tosave].param = param;
        mr->messages[mr->msg_tosave].hEvent = INVALID_HANDLE_VALUE;
        mr->msg_tosave = (mr->msg_tosave + 1) % mr->ring_buffer_size;
    }

    LeaveCriticalSection(&mr->msg_crst);

    SetEvent(mr->msg_event);    /* signal a new message */

    if (wait)
    {
        /* wait for playback/record thread to have processed the message */
        WaitForSingleObject(hEvent, INFINITE);
        CloseHandle(hEvent);
    }

    return 1;
}

/******************************************************************
 *              ARTS_RetrieveRingMessage
 *
 * Get a message from the ring. Should be called by the playback/record thread.
 */
static int ARTS_RetrieveRingMessage(ARTS_MSG_RING* mr,
                                   enum win_wm_message *msg, DWORD *param, HANDLE *hEvent)
{
    EnterCriticalSection(&mr->msg_crst);

    if (mr->msg_toget == mr->msg_tosave) /* buffer empty ? */
    {
        LeaveCriticalSection(&mr->msg_crst);
        return 0;
    }

    *msg = mr->messages[mr->msg_toget].msg;
    mr->messages[mr->msg_toget].msg = 0;
    *param = mr->messages[mr->msg_toget].param;
    *hEvent = mr->messages[mr->msg_toget].hEvent;
    mr->msg_toget = (mr->msg_toget + 1) % mr->ring_buffer_size;
    LeaveCriticalSection(&mr->msg_crst);
    return 1;
}

/*======================================================================*
 *                  Low level WAVE OUT implementation                   *
 *======================================================================*/

/**************************************************************************
 *                      wodNotifyClient                 [internal]
 */
static DWORD wodNotifyClient(WINE_WAVEOUT* wwo, WORD wMsg, DWORD dwParam1, DWORD dwParam2)
{
    TRACE("wMsg = 0x%04x dwParm1 = %04lX dwParam2 = %04lX\n", wMsg, dwParam1, dwParam2);

    switch (wMsg) {
    case WOM_OPEN:
    case WOM_CLOSE:
    case WOM_DONE:
        if (wwo->wFlags != DCB_NULL &&
            !DriverCallback(wwo->waveDesc.dwCallback, wwo->wFlags, (HDRVR)wwo->waveDesc.hWave,
                            wMsg, wwo->waveDesc.dwInstance, dwParam1, dwParam2)) {
            WARN("can't notify client !\n");
            return MMSYSERR_ERROR;
        }
        break;
    default:
        FIXME("Unknown callback message %u\n", wMsg);
        return MMSYSERR_INVALPARAM;
    }
    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                              wodUpdatePlayedTotal    [internal]
 *
 */
static BOOL wodUpdatePlayedTotal(WINE_WAVEOUT* wwo)
{
    /* total played is the bytes written less the bytes to write ;-) */
    wwo->dwPlayedTotal = wwo->dwWrittenTotal -
        (wwo->dwBufferSize -
        arts_stream_get(wwo->play_stream, ARTS_P_BUFFER_SPACE));

    return TRUE;
}

/**************************************************************************
 *                              wodPlayer_BeginWaveHdr          [internal]
 *
 * Makes the specified lpWaveHdr the currently playing wave header.
 * If the specified wave header is a begin loop and we're not already in
 * a loop, setup the loop.
 */
static void wodPlayer_BeginWaveHdr(WINE_WAVEOUT* wwo, LPWAVEHDR lpWaveHdr)
{
    wwo->lpPlayPtr = lpWaveHdr;

    if (!lpWaveHdr) return;

    if (lpWaveHdr->dwFlags & WHDR_BEGINLOOP) {
        if (wwo->lpLoopPtr) {
            WARN("Already in a loop. Discarding loop on this header (%p)\n", lpWaveHdr);
            TRACE("Already in a loop. Discarding loop on this header (%p)\n", lpWaveHdr);
        } else {
            TRACE("Starting loop (%ldx) with %p\n", lpWaveHdr->dwLoops, lpWaveHdr);
            wwo->lpLoopPtr = lpWaveHdr;
            /* Windows does not touch WAVEHDR.dwLoops,
             * so we need to make an internal copy */
            wwo->dwLoops = lpWaveHdr->dwLoops;
        }
    }
    wwo->dwPartialOffset = 0;
}

/**************************************************************************
 *                              wodPlayer_PlayPtrNext           [internal]
 *
 * Advance the play pointer to the next waveheader, looping if required.
 */
static LPWAVEHDR wodPlayer_PlayPtrNext(WINE_WAVEOUT* wwo)
{
    LPWAVEHDR lpWaveHdr = wwo->lpPlayPtr;

    wwo->dwPartialOffset = 0;
    if ((lpWaveHdr->dwFlags & WHDR_ENDLOOP) && wwo->lpLoopPtr) {
        /* We're at the end of a loop, loop if required */
        if (--wwo->dwLoops > 0) {
            wwo->lpPlayPtr = wwo->lpLoopPtr;
        } else {
            /* Handle overlapping loops correctly */
            if (wwo->lpLoopPtr != lpWaveHdr && (lpWaveHdr->dwFlags & WHDR_BEGINLOOP)) {
                FIXME("Correctly handled case ? (ending loop buffer also starts a new loop)\n");
                /* shall we consider the END flag for the closing loop or for
                 * the opening one or for both ???
                 * code assumes for closing loop only
                 */
            } else {
                lpWaveHdr = lpWaveHdr->lpNext;
            }
            wwo->lpLoopPtr = NULL;
            wodPlayer_BeginWaveHdr(wwo, lpWaveHdr);
        }
    } else {
        /* We're not in a loop.  Advance to the next wave header */
        wodPlayer_BeginWaveHdr(wwo, lpWaveHdr = lpWaveHdr->lpNext);
    }

    return lpWaveHdr;
}

/**************************************************************************
 *                           wodPlayer_NotifyWait               [internal]
 * Returns the number of milliseconds to wait before attempting to notify
 * completion of the specified wavehdr.
 * This is based on the number of bytes remaining to be written in the
 * wave.
 */
static DWORD wodPlayer_NotifyWait(const WINE_WAVEOUT* wwo, LPWAVEHDR lpWaveHdr)
{
    DWORD dwMillis;

    if(lpWaveHdr->reserved < wwo->dwPlayedTotal)
    {
        dwMillis = 1;
    }
    else
    {
        dwMillis = (lpWaveHdr->reserved - wwo->dwPlayedTotal) * 1000 / wwo->format.wf.nAvgBytesPerSec;
        if(!dwMillis) dwMillis = 1;
    }

    TRACE("dwMillis = %ld\n", dwMillis);

    return dwMillis;
}


/**************************************************************************
 *                           wodPlayer_WriteMaxFrags            [internal]
 * Writes the maximum number of bytes possible to the DSP and returns
 * the number of bytes written.
 */
static int wodPlayer_WriteMaxFrags(WINE_WAVEOUT* wwo, DWORD* bytes)
{
    /* Only attempt to write to free bytes */
    DWORD dwLength = wwo->lpPlayPtr->dwBufferLength - wwo->dwPartialOffset;
    int toWrite = min(dwLength, *bytes);
    int written;

    TRACE("Writing wavehdr %p.%lu[%lu]\n",
          wwo->lpPlayPtr, wwo->dwPartialOffset, wwo->lpPlayPtr->dwBufferLength);

    /* see if our buffer isn't large enough for the data we are writing */
    if(wwo->buffer_size < toWrite)
    {
      if(wwo->sound_buffer)
      {
        HeapRealloc(GetProcessHeap(), 0, wwo->sound_buffer, toWrite);
        wwo->buffer_size = toWrite;
      }
    }

    /* if we don't have a buffer then get one */
    if(!wwo->sound_buffer)
    {
      /* allocate some memory for the buffer */
      wwo->sound_buffer = HeapAlloc(GetProcessHeap(), 0, toWrite);
      wwo->buffer_size = toWrite;
    }

    /* if we don't have a buffer then error out */
    if(!wwo->sound_buffer)
    {
      ERR("error allocating sound_buffer memory\n");
      return 0;
    }

    TRACE("toWrite == %d\n", toWrite);

    /* apply volume to the bits */
    /* for single channel audio streams we only use the LEFT volume */
    if(wwo->format.wBitsPerSample == 16)
    {
      /* apply volume to the buffer we are about to send */
      /* divide toWrite(bytes) by 2 as volume processes by 16 bits */
      volume_effect16(wwo->lpPlayPtr->lpData + wwo->dwPartialOffset,
                wwo->sound_buffer, toWrite>>1, wwo->volume_left,
                wwo->volume_right, wwo->format.wf.nChannels);
    } else if(wwo->format.wBitsPerSample == 8)
    {
      /* apply volume to the buffer we are about to send */
      volume_effect8(wwo->lpPlayPtr->lpData + wwo->dwPartialOffset,
                wwo->sound_buffer, toWrite, wwo->volume_left,
                wwo->volume_right, wwo->format.wf.nChannels);
    } else
    {
      FIXME("unsupported wwo->format.wBitsPerSample of %d\n",
        wwo->format.wBitsPerSample);
    }

    /* send the audio data to arts for playing */
    written = arts_write(wwo->play_stream, wwo->sound_buffer, toWrite);

    TRACE("written = %d\n", written);

    if (written <= 0) 
    {
      *bytes = 0; /* apparently arts is actually full */
      return written; /* if we wrote nothing just return */
    }

    if (written >= dwLength)
        wodPlayer_PlayPtrNext(wwo);   /* If we wrote all current wavehdr, skip to the next one */
    else
        wwo->dwPartialOffset += written;    /* Remove the amount written */

    if (written < toWrite)
        *bytes = 0;
    else
        *bytes -= written;

    wwo->dwWrittenTotal += written; /* update stats on this wave device */

    return written; /* return the number of bytes written */
}


/**************************************************************************
 *                              wodPlayer_NotifyCompletions     [internal]
 *
 * Notifies and remove from queue all wavehdrs which have been played to
 * the speaker (ie. they have cleared the audio device).  If force is true,
 * we notify all wavehdrs and remove them all from the queue even if they
 * are unplayed or part of a loop.
 */
static DWORD wodPlayer_NotifyCompletions(WINE_WAVEOUT* wwo, BOOL force)
{
    LPWAVEHDR           lpWaveHdr;

    if (wwo->lpQueuePtr) {
        TRACE("lpWaveHdr=(%p), lpPlayPtr=(%p), lpLoopPtr=(%p), reserved=(%ld), dwWrittenTotal=(%ld), force=(%d)\n", 
              wwo->lpQueuePtr,
              wwo->lpPlayPtr,
              wwo->lpLoopPtr,
              wwo->lpQueuePtr->reserved,
              wwo->dwWrittenTotal,
              force);
    } else {
        TRACE("lpWaveHdr=(%p), lpPlayPtr=(%p), lpLoopPtr=(%p),  dwWrittenTotal=(%ld), force=(%d)\n", 
              wwo->lpQueuePtr,
              wwo->lpPlayPtr,
              wwo->lpLoopPtr,
              wwo->dwWrittenTotal,
              force);
    }

    /* Start from lpQueuePtr and keep notifying until:
     * - we hit an unwritten wavehdr
     * - we hit the beginning of a running loop
     * - we hit a wavehdr which hasn't finished playing
     */
    while ((lpWaveHdr = wwo->lpQueuePtr) &&
           (force ||
            (lpWaveHdr != wwo->lpPlayPtr &&
             lpWaveHdr != wwo->lpLoopPtr &&
             lpWaveHdr->reserved <= wwo->dwWrittenTotal))) {

        wwo->lpQueuePtr = lpWaveHdr->lpNext;

        lpWaveHdr->dwFlags &= ~WHDR_INQUEUE;
        lpWaveHdr->dwFlags |= WHDR_DONE;

        wodNotifyClient(wwo, WOM_DONE, (DWORD)lpWaveHdr, 0);
    }
    return  (lpWaveHdr && lpWaveHdr != wwo->lpPlayPtr && lpWaveHdr != wwo->lpLoopPtr) ?
        wodPlayer_NotifyWait(wwo, lpWaveHdr) : INFINITE;
}

/**************************************************************************
 *                              wodPlayer_Reset                 [internal]
 *
 * wodPlayer helper. Resets current output stream.
 */
static  void    wodPlayer_Reset(WINE_WAVEOUT* wwo, BOOL reset)
{
    wodUpdatePlayedTotal(wwo);

    wodPlayer_NotifyCompletions(wwo, FALSE); /* updates current notify list */

    /* we aren't able to flush any data that has already been written */
    /* to arts, otherwise we would do the flushing here */

    if (reset) {
        enum win_wm_message     msg;
        DWORD                   param;
        HANDLE                  ev;

        /* remove any buffer */
        wodPlayer_NotifyCompletions(wwo, TRUE);

        wwo->lpPlayPtr = wwo->lpQueuePtr = wwo->lpLoopPtr = NULL;
        wwo->state = WINE_WS_STOPPED;
        wwo->dwPlayedTotal = wwo->dwWrittenTotal = 0;

        wwo->dwPartialOffset = 0;        /* Clear partial wavehdr */

        /* remove any existing message in the ring */
        EnterCriticalSection(&wwo->msgRing.msg_crst);

        /* return all pending headers in queue */
        while (ARTS_RetrieveRingMessage(&wwo->msgRing, &msg, &param, &ev))
        {
            TRACE("flushing msg\n");
            if (msg != WINE_WM_HEADER)
            {
                FIXME("shouldn't have headers left\n");
                SetEvent(ev);
                continue;
            }
            ((LPWAVEHDR)param)->dwFlags &= ~WHDR_INQUEUE;
            ((LPWAVEHDR)param)->dwFlags |= WHDR_DONE;

            wodNotifyClient(wwo, WOM_DONE, param, 0);
        }
        ResetEvent(wwo->msgRing.msg_event);
        LeaveCriticalSection(&wwo->msgRing.msg_crst);
    } else {
        if (wwo->lpLoopPtr) {
            /* complicated case, not handled yet (could imply modifying the loop counter */
            FIXME("Pausing while in loop isn't correctly handled yet, except strange results\n");
            wwo->lpPlayPtr = wwo->lpLoopPtr;
            wwo->dwPartialOffset = 0;
            wwo->dwWrittenTotal = wwo->dwPlayedTotal; /* this is wrong !!! */
        } else {
            /* the data already written is going to be played, so take */
            /* this fact into account here */
            wwo->dwPlayedTotal = wwo->dwWrittenTotal;
        }
        wwo->state = WINE_WS_PAUSED;
    }
}

/**************************************************************************
 *                    wodPlayer_ProcessMessages                 [internal]
 */
static void wodPlayer_ProcessMessages(WINE_WAVEOUT* wwo)
{
    LPWAVEHDR           lpWaveHdr;
    enum win_wm_message msg;
    DWORD               param;
    HANDLE              ev;

    while (ARTS_RetrieveRingMessage(&wwo->msgRing, &msg, &param, &ev)) {
        TRACE("Received %s %lx\n", wodPlayerCmdString[msg - WM_USER - 1], param);
        switch (msg) {
        case WINE_WM_PAUSING:
            wodPlayer_Reset(wwo, FALSE);
            SetEvent(ev);
            break;
        case WINE_WM_RESTARTING:
            wwo->state = WINE_WS_PLAYING;
            SetEvent(ev);
            break;
        case WINE_WM_HEADER:
            lpWaveHdr = (LPWAVEHDR)param;

            /* insert buffer at the end of queue */
            {
                LPWAVEHDR*      wh;
                for (wh = &(wwo->lpQueuePtr); *wh; wh = &((*wh)->lpNext));
                *wh = lpWaveHdr;
            }
            if (!wwo->lpPlayPtr)
                wodPlayer_BeginWaveHdr(wwo,lpWaveHdr);
            if (wwo->state == WINE_WS_STOPPED)
                wwo->state = WINE_WS_PLAYING;
            break;
        case WINE_WM_RESETTING:
            wodPlayer_Reset(wwo, TRUE);
            SetEvent(ev);
            break;
        case WINE_WM_UPDATE:
            wodUpdatePlayedTotal(wwo);
            SetEvent(ev);
            break;
        case WINE_WM_BREAKLOOP:
            if (wwo->state == WINE_WS_PLAYING && wwo->lpLoopPtr != NULL) {
                /* ensure exit at end of current loop */
                wwo->dwLoops = 1;
            }
            SetEvent(ev);
            break;
        case WINE_WM_CLOSING:
            /* sanity check: this should not happen since the device must have been reset before */
            if (wwo->lpQueuePtr || wwo->lpPlayPtr) ERR("out of sync\n");
            wwo->hThread = 0;
            wwo->state = WINE_WS_CLOSED;
            SetEvent(ev);
            ExitThread(0);
            /* shouldn't go here */
        default:
            FIXME("unknown message %d\n", msg);
            break;
        }
    }
}

/**************************************************************************
 *                           wodPlayer_FeedDSP                  [internal]
 * Feed as much sound data as we can into the DSP and return the number of
 * milliseconds before it will be necessary to feed the DSP again.
 */
static DWORD wodPlayer_FeedDSP(WINE_WAVEOUT* wwo)
{
    DWORD       availInQ;

    wodUpdatePlayedTotal(wwo);
    availInQ = arts_stream_get(wwo->play_stream, ARTS_P_BUFFER_SPACE);
    TRACE("availInQ = %ld\n", availInQ);

    /* input queue empty */
    if (!wwo->lpPlayPtr) {
        TRACE("Run out of wavehdr:s... flushing\n");
        return INFINITE;
    }

    /* no more room... no need to try to feed */
    if(!availInQ)
    {
        TRACE("no more room, no need to try to feed\n");
        return wwo->dwSleepTime;
    }

    /* Feed from partial wavehdr */
    if (wwo->lpPlayPtr && wwo->dwPartialOffset != 0)
    {
        TRACE("feeding from partial wavehdr\n");
        wodPlayer_WriteMaxFrags(wwo, &availInQ);
    }

    /* Feed wavehdrs until we run out of wavehdrs or DSP space */
    if (!wwo->dwPartialOffset)
    {
        while(wwo->lpPlayPtr && availInQ)
        {
            TRACE("feeding waveheaders until we run out of space\n");
            /* note the value that dwPlayedTotal will return when this wave finishes playing */
            wwo->lpPlayPtr->reserved = wwo->dwWrittenTotal + wwo->lpPlayPtr->dwBufferLength;
            TRACE("reserved=(%ld) dwWrittenTotal=(%ld) dwBufferLength=(%ld)\n",
                  wwo->lpPlayPtr->reserved,
                  wwo->dwWrittenTotal,
                  wwo->lpPlayPtr->dwBufferLength
                );
            wodPlayer_WriteMaxFrags(wwo, &availInQ);
        }
    }

    if (!wwo->lpPlayPtr) {
        TRACE("Ran out of wavehdrs\n");
        return INFINITE;
    }

    return wwo->dwSleepTime;
}


/**************************************************************************
 *                              wodPlayer                       [internal]
 */
static  DWORD   CALLBACK        wodPlayer(LPVOID pmt)
{
    WORD          uDevID = (DWORD)pmt;
    WINE_WAVEOUT* wwo = (WINE_WAVEOUT*)&WOutDev[uDevID];
    DWORD         dwNextFeedTime = INFINITE;   /* Time before DSP needs feeding */
    DWORD         dwNextNotifyTime = INFINITE; /* Time before next wave completion */
    DWORD         dwSleepTime;

    wwo->state = WINE_WS_STOPPED;
    SetEvent(wwo->hStartUpEvent);

    for (;;) {
        /** Wait for the shortest time before an action is required.  If there
         *  are no pending actions, wait forever for a command.
         */
        dwSleepTime = min(dwNextFeedTime, dwNextNotifyTime);
        TRACE("waiting %lums (%lu,%lu)\n", dwSleepTime, dwNextFeedTime, dwNextNotifyTime);
        WaitForSingleObject(wwo->msgRing.msg_event, dwSleepTime);
        wodPlayer_ProcessMessages(wwo);
        if (wwo->state == WINE_WS_PLAYING) {
            dwNextFeedTime = wodPlayer_FeedDSP(wwo);
            dwNextNotifyTime = wodPlayer_NotifyCompletions(wwo, FALSE);
        } else {
            dwNextFeedTime = dwNextNotifyTime = INFINITE;
        }
    }
}

/**************************************************************************
 *                      wodGetDevCaps                           [internal]
 */
static DWORD wodGetDevCaps(WORD wDevID, LPWAVEOUTCAPSA lpCaps, DWORD dwSize)
{
    TRACE("(%u, %p, %lu);\n", wDevID, lpCaps, dwSize);

    if (lpCaps == NULL) return MMSYSERR_NOTENABLED;

    if (wDevID >= MAX_WAVEOUTDRV) {
        TRACE("MAX_WAVOUTDRV reached !\n");
        return MMSYSERR_BADDEVICEID;
    }

    memcpy(lpCaps, &WOutDev[wDevID].caps, min(dwSize, sizeof(*lpCaps)));
    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                              wodOpen                         [internal]
 */
static DWORD wodOpen(WORD wDevID, LPWAVEOPENDESC lpDesc, DWORD dwFlags)
{
    WINE_WAVEOUT*       wwo;

    TRACE("(%u, %p, %08lX);\n", wDevID, lpDesc, dwFlags);
    if (lpDesc == NULL) {
        WARN("Invalid Parameter !\n");
        return MMSYSERR_INVALPARAM;
    }
    if (wDevID >= MAX_WAVEOUTDRV) {
        TRACE("MAX_WAVOUTDRV reached !\n");
        return MMSYSERR_BADDEVICEID;
    }

    /* if this device is already open tell the app that it is allocated */
    if(WOutDev[wDevID].play_stream != (arts_stream_t*)-1)
    {
      TRACE("device already allocated\n");
      return MMSYSERR_ALLOCATED;
    }

    /* only PCM format is supported so far... */
    if (lpDesc->lpFormat->wFormatTag != WAVE_FORMAT_PCM ||
        lpDesc->lpFormat->nChannels == 0 ||
        lpDesc->lpFormat->nSamplesPerSec == 0) {
        WARN("Bad format: tag=%04X nChannels=%d nSamplesPerSec=%ld !\n",
             lpDesc->lpFormat->wFormatTag, lpDesc->lpFormat->nChannels,
             lpDesc->lpFormat->nSamplesPerSec);
        return WAVERR_BADFORMAT;
    }

    if (dwFlags & WAVE_FORMAT_QUERY) {
        TRACE("Query format: tag=%04X nChannels=%d nSamplesPerSec=%ld !\n",
             lpDesc->lpFormat->wFormatTag, lpDesc->lpFormat->nChannels,
             lpDesc->lpFormat->nSamplesPerSec);
        return MMSYSERR_NOERROR;
    }

    wwo = &WOutDev[wDevID];

    /* direct sound not supported, ignore the flag */
    dwFlags &= ~WAVE_DIRECTSOUND;

    wwo->wFlags = HIWORD(dwFlags & CALLBACK_TYPEMASK);

    memcpy(&wwo->waveDesc, lpDesc,           sizeof(WAVEOPENDESC));
    memcpy(&wwo->format,   lpDesc->lpFormat, sizeof(PCMWAVEFORMAT));

    if (wwo->format.wBitsPerSample == 0) {
        WARN("Resetting zeroed wBitsPerSample\n");
        wwo->format.wBitsPerSample = 8 *
            (wwo->format.wf.nAvgBytesPerSec /
             wwo->format.wf.nSamplesPerSec) /
            wwo->format.wf.nChannels;
    }

    wwo->play_stream = arts_play_stream(wwo->format.wf.nSamplesPerSec,
        wwo->format.wBitsPerSample, wwo->format.wf.nChannels, "winearts");

    /* clear these so we don't have any confusion ;-) */
    wwo->sound_buffer = 0;
    wwo->buffer_size = 0;

    arts_stream_set(wwo->play_stream, ARTS_P_BLOCKING, 0);    /* disable blocking on this stream */

    if(!wwo->play_stream) return MMSYSERR_ALLOCATED;

    /* Try to set the packet settings from constant and store the value that it
       was actually set to for future use */
    wwo->packetSettings = arts_stream_set(wwo->play_stream, ARTS_P_PACKET_SETTINGS, WAVEOUT_PACKET_SETTINGS);
    TRACE("Tried to set ARTS_P_PACKET_SETTINGS to (%x), actually set to (%x)\n", WAVEOUT_PACKET_SETTINGS, wwo->packetSettings);

    wwo->dwBufferSize = arts_stream_get(wwo->play_stream, ARTS_P_BUFFER_SIZE);
    TRACE("Buffer size is now (%ld)\n",wwo->dwBufferSize);

    wwo->dwPlayedTotal = 0;
    wwo->dwWrittenTotal = 0;

    wwo->dwSleepTime = ((1 << (wwo->packetSettings & 0xFFFF)) * 1000 * BUFFER_REFILL_THRESHOLD) / wwo->format.wf.nAvgBytesPerSec;

    /* Initialize volume to full level */
    wwo->volume_left = 100;
    wwo->volume_right = 100;

    ARTS_InitRingMessage(&wwo->msgRing);

    /* create player thread */
    if (!(dwFlags & WAVE_DIRECTSOUND)) {
        wwo->hStartUpEvent = CreateEventA(NULL, FALSE, FALSE, NULL);
        wwo->hThread = CreateThread(NULL, 0, wodPlayer, (LPVOID)(DWORD)wDevID, 0, &(wwo->dwThreadID));
        WaitForSingleObject(wwo->hStartUpEvent, INFINITE);
        CloseHandle(wwo->hStartUpEvent);
    } else {
        wwo->hThread = INVALID_HANDLE_VALUE;
        wwo->dwThreadID = 0;
    }
    wwo->hStartUpEvent = INVALID_HANDLE_VALUE;

    TRACE("stream=0x%lx, dwBufferSize=%ld\n",
          (long)wwo->play_stream, wwo->dwBufferSize);

    TRACE("wBitsPerSample=%u, nAvgBytesPerSec=%lu, nSamplesPerSec=%lu, nChannels=%u nBlockAlign=%u!\n",
          wwo->format.wBitsPerSample, wwo->format.wf.nAvgBytesPerSec,
          wwo->format.wf.nSamplesPerSec, wwo->format.wf.nChannels,
          wwo->format.wf.nBlockAlign);

    return wodNotifyClient(wwo, WOM_OPEN, 0L, 0L);
}

/**************************************************************************
 *                              wodClose                        [internal]
 */
static DWORD wodClose(WORD wDevID)
{
    DWORD               ret = MMSYSERR_NOERROR;
    WINE_WAVEOUT*       wwo;

    TRACE("(%u);\n", wDevID);

    if (wDevID >= MAX_WAVEOUTDRV || WOutDev[wDevID].play_stream  ==
        (arts_stream_t*)-1)
    {
        WARN("bad device ID !\n");
        return MMSYSERR_BADDEVICEID;
    }

    wwo = &WOutDev[wDevID];
    if (wwo->lpQueuePtr) {
        WARN("buffers still playing !\n");
        ret = WAVERR_STILLPLAYING;
    } else {
        TRACE("imhere[3-close]\n");
        if (wwo->hThread != INVALID_HANDLE_VALUE) {
            ARTS_AddRingMessage(&wwo->msgRing, WINE_WM_CLOSING, 0, TRUE);
        }

        ARTS_DestroyRingMessage(&wwo->msgRing);

        ARTS_CloseWaveOutDevice(wwo);   /* close the stream and clean things up */

        ret = wodNotifyClient(wwo, WOM_CLOSE, 0L, 0L);
    }
    return ret;
}

/**************************************************************************
 *                              wodWrite                        [internal]
 *
 */
static DWORD wodWrite(WORD wDevID, LPWAVEHDR lpWaveHdr, DWORD dwSize)
{
    TRACE("(%u, %p, %08lX);\n", wDevID, lpWaveHdr, dwSize);

    /* first, do the sanity checks... */
    if (wDevID >= MAX_WAVEOUTDRV || WOutDev[wDevID].play_stream ==
                (arts_stream_t*)-1)
    {
        WARN("bad dev ID !\n");
        return MMSYSERR_BADDEVICEID;
    }

    if (lpWaveHdr->lpData == NULL || !(lpWaveHdr->dwFlags & WHDR_PREPARED))
    {
        TRACE("unprepared\n");
        return WAVERR_UNPREPARED;
    }

    if (lpWaveHdr->dwFlags & WHDR_INQUEUE)
    {
        TRACE("still playing\n");
        return WAVERR_STILLPLAYING;
    }

    lpWaveHdr->dwFlags &= ~WHDR_DONE;
    lpWaveHdr->dwFlags |= WHDR_INQUEUE;
    lpWaveHdr->lpNext = 0;

    TRACE("adding ring message\n");
    ARTS_AddRingMessage(&WOutDev[wDevID].msgRing, WINE_WM_HEADER, (DWORD)lpWaveHdr, FALSE);

    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                              wodPrepare                      [internal]
 */
static DWORD wodPrepare(WORD wDevID, LPWAVEHDR lpWaveHdr, DWORD dwSize)
{
    TRACE("(%u, %p, %08lX);\n", wDevID, lpWaveHdr, dwSize);

    if (wDevID >= MAX_WAVEOUTDRV) {
        WARN("bad device ID !\n");
        return MMSYSERR_BADDEVICEID;
    }

    if (lpWaveHdr->dwFlags & WHDR_INQUEUE)
        return WAVERR_STILLPLAYING;

    lpWaveHdr->dwFlags |= WHDR_PREPARED;
    lpWaveHdr->dwFlags &= ~WHDR_DONE;
    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                              wodUnprepare                    [internal]
 */
static DWORD wodUnprepare(WORD wDevID, LPWAVEHDR lpWaveHdr, DWORD dwSize)
{
    TRACE("(%u, %p, %08lX);\n", wDevID, lpWaveHdr, dwSize);

    if (wDevID >= MAX_WAVEOUTDRV) {
        WARN("bad device ID !\n");
        return MMSYSERR_BADDEVICEID;
    }

    if (lpWaveHdr->dwFlags & WHDR_INQUEUE)
        return WAVERR_STILLPLAYING;

    lpWaveHdr->dwFlags &= ~WHDR_PREPARED;
    lpWaveHdr->dwFlags |= WHDR_DONE;

    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                      wodPause                                [internal]
 */
static DWORD wodPause(WORD wDevID)
{
    TRACE("(%u);!\n", wDevID);

    if (wDevID >= MAX_WAVEOUTDRV || WOutDev[wDevID].play_stream ==
                (arts_stream_t*)-1)
    {
        WARN("bad device ID !\n");
        return MMSYSERR_BADDEVICEID;
    }

    TRACE("imhere[3-PAUSING]\n");
    ARTS_AddRingMessage(&WOutDev[wDevID].msgRing, WINE_WM_PAUSING, 0, TRUE);

    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                      wodRestart                              [internal]
 */
static DWORD wodRestart(WORD wDevID)
{
    TRACE("(%u);\n", wDevID);

    if (wDevID >= MAX_WAVEOUTDRV || WOutDev[wDevID].play_stream ==
                (arts_stream_t*)-1)
    {
        WARN("bad device ID !\n");
        return MMSYSERR_BADDEVICEID;
    }

    if (WOutDev[wDevID].state == WINE_WS_PAUSED) {
        TRACE("imhere[3-RESTARTING]\n");
        ARTS_AddRingMessage(&WOutDev[wDevID].msgRing, WINE_WM_RESTARTING, 0, TRUE);
    }

    /* FIXME: is NotifyClient with WOM_DONE right ? (Comet Busters 1.3.3 needs this notification) */
    /* FIXME: Myst crashes with this ... hmm -MM
       return wodNotifyClient(wwo, WOM_DONE, 0L, 0L);
    */

    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                      wodReset                                [internal]
 */
static DWORD wodReset(WORD wDevID)
{
    TRACE("(%u);\n", wDevID);

    if (wDevID >= MAX_WAVEOUTDRV || WOutDev[wDevID].play_stream ==
        (arts_stream_t*)-1)
    {
        WARN("bad device ID !\n");
        return MMSYSERR_BADDEVICEID;
    }

    TRACE("imhere[3-RESET]\n");
    ARTS_AddRingMessage(&WOutDev[wDevID].msgRing, WINE_WM_RESETTING, 0, TRUE);

    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                              wodGetPosition                  [internal]
 */
static DWORD wodGetPosition(WORD wDevID, LPMMTIME lpTime, DWORD uSize)
{
    int                 time;
    DWORD               val;
    WINE_WAVEOUT*       wwo;

    TRACE("(%u, %p, %lu);\n", wDevID, lpTime, uSize);

    if (wDevID >= MAX_WAVEOUTDRV || WOutDev[wDevID].play_stream ==
        (arts_stream_t*)-1)
    {
        WARN("bad device ID !\n");
        return MMSYSERR_BADDEVICEID;
    }

    if (lpTime == NULL) return MMSYSERR_INVALPARAM;

    wwo = &WOutDev[wDevID];
    ARTS_AddRingMessage(&wwo->msgRing, WINE_WM_UPDATE, 0, TRUE);
    val = wwo->dwPlayedTotal;

    TRACE("wType=%04X wBitsPerSample=%u nSamplesPerSec=%lu nChannels=%u nAvgBytesPerSec=%lu\n",
          lpTime->wType, wwo->format.wBitsPerSample,
          wwo->format.wf.nSamplesPerSec, wwo->format.wf.nChannels,
          wwo->format.wf.nAvgBytesPerSec);
    TRACE("dwPlayedTotal=%lu\n", val);

    switch (lpTime->wType) {
    case TIME_BYTES:
        lpTime->u.cb = val;
        TRACE("TIME_BYTES=%lu\n", lpTime->u.cb);
        break;
    case TIME_SAMPLES:
        lpTime->u.sample = val * 8 / wwo->format.wBitsPerSample /wwo->format.wf.nChannels;
        TRACE("TIME_SAMPLES=%lu\n", lpTime->u.sample);
        break;
    case TIME_SMPTE:
        time = val / (wwo->format.wf.nAvgBytesPerSec / 1000);
        lpTime->u.smpte.hour = time / 108000;
        time -= lpTime->u.smpte.hour * 108000;
        lpTime->u.smpte.min = time / 1800;
        time -= lpTime->u.smpte.min * 1800;
        lpTime->u.smpte.sec = time / 30;
        time -= lpTime->u.smpte.sec * 30;
        lpTime->u.smpte.frame = time;
        lpTime->u.smpte.fps = 30;
        TRACE("TIME_SMPTE=%02u:%02u:%02u:%02u\n",
              lpTime->u.smpte.hour, lpTime->u.smpte.min,
              lpTime->u.smpte.sec, lpTime->u.smpte.frame);
        break;
    default:
        FIXME("Format %d not supported ! use TIME_MS !\n", lpTime->wType);
        lpTime->wType = TIME_MS;
    case TIME_MS:
        lpTime->u.ms = val / (wwo->format.wf.nAvgBytesPerSec / 1000);
        TRACE("TIME_MS=%lu\n", lpTime->u.ms);
        break;
    }
    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                              wodBreakLoop                    [internal]
 */
static DWORD wodBreakLoop(WORD wDevID)
{
    TRACE("(%u);\n", wDevID);

    if (wDevID >= MAX_WAVEOUTDRV || WOutDev[wDevID].play_stream ==
                (arts_stream_t*)-1)
    {
        WARN("bad device ID !\n");
        return MMSYSERR_BADDEVICEID;
    }
    ARTS_AddRingMessage(&WOutDev[wDevID].msgRing, WINE_WM_BREAKLOOP, 0, TRUE);
    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                              wodGetVolume                    [internal]
 */
static DWORD wodGetVolume(WORD wDevID, LPDWORD lpdwVol)
{
    DWORD left, right;

    left = WOutDev[wDevID].volume_left;
    right = WOutDev[wDevID].volume_right;

    TRACE("(%u, %p);\n", wDevID, lpdwVol);

    *lpdwVol = ((left * 0xFFFFl) / 100) + (((right * 0xFFFFl) / 100) <<
                16);

    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                              wodSetVolume                    [internal]
 */
static DWORD wodSetVolume(WORD wDevID, DWORD dwParam)
{
    DWORD left, right;

    left  = (LOWORD(dwParam) * 100) / 0xFFFFl;
    right = (HIWORD(dwParam) * 100) / 0xFFFFl;

    TRACE("(%u, %08lX);\n", wDevID, dwParam);

    WOutDev[wDevID].volume_left = left;
    WOutDev[wDevID].volume_right = right;

    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                              wodGetNumDevs                   [internal]
 */
static  DWORD   wodGetNumDevs(void)
{
    return MAX_WAVEOUTDRV;
}

/**************************************************************************
 *                              wodMessage (WINEARTS.@)
 */
DWORD WINAPI ARTS_wodMessage(UINT wDevID, UINT wMsg, DWORD dwUser,
                            DWORD dwParam1, DWORD 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          (wDevID, (LPWAVEOPENDESC)dwParam1,      dwParam2);
    case WODM_CLOSE:            return wodClose         (wDevID);
    case WODM_WRITE:            return wodWrite         (wDevID, (LPWAVEHDR)dwParam1,           dwParam2);
    case WODM_PAUSE:            return wodPause         (wDevID);
    case WODM_GETPOS:           return wodGetPosition   (wDevID, (LPMMTIME)dwParam1,            dwParam2);
    case WODM_BREAKLOOP:        return wodBreakLoop     (wDevID);
    case WODM_PREPARE:          return wodPrepare       (wDevID, (LPWAVEHDR)dwParam1,           dwParam2);
    case WODM_UNPREPARE:        return wodUnprepare     (wDevID, (LPWAVEHDR)dwParam1,           dwParam2);
    case WODM_GETDEVCAPS:       return wodGetDevCaps    (wDevID, (LPWAVEOUTCAPSA)dwParam1,      dwParam2);
    case WODM_GETNUMDEVS:       return wodGetNumDevs    ();
    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, (LPDWORD)dwParam1);
    case WODM_SETVOLUME:        return wodSetVolume     (wDevID, dwParam1);
    case WODM_RESTART:          return wodRestart       (wDevID);
    case WODM_RESET:            return wodReset         (wDevID);

    case DRV_QUERYDSOUNDIFACE:  return wodDsCreate      (wDevID, (PIDSDRIVER*)dwParam1);
    case DRV_QUERYDSOUNDDESC:   return wodDsDesc        (wDevID, (PDSDRIVERDESC)dwParam1);
    case DRV_QUERYDSOUNDGUID:   return wodDsGuid        (wDevID, (LPGUID)dwParam1);
    default:
        FIXME("unknown message %d!\n", wMsg);
    }
    return MMSYSERR_NOTSUPPORTED;
}

/*======================================================================*
 *                  Low level WAVE IN implementation                    *
 *======================================================================*/

/**************************************************************************
 *                              widGetNumDevs                   [internal]
 */
static  DWORD   widGetNumDevs(void)
{
    TRACE("%d \n",MAX_WAVEINDRV);
    return MAX_WAVEINDRV;
}

/**************************************************************************
 *                      widNotifyClient                 [internal]
 */
static DWORD widNotifyClient(WINE_WAVEIN* wwi, WORD wMsg, DWORD dwParam1, DWORD dwParam2)
{
    TRACE("wMsg = 0x%04x dwParm1 = %04lX dwParam2 = %04lX\n", wMsg, dwParam1, dwParam2);

    switch (wMsg) {
    case WIM_OPEN:
    case WIM_CLOSE:
    case WIM_DATA:
        if (wwi->wFlags != DCB_NULL &&
            !DriverCallback(wwi->waveDesc.dwCallback, wwi->wFlags,
                            (HDRVR)wwi->waveDesc.hWave, wMsg,
                            wwi->waveDesc.dwInstance, dwParam1, dwParam2)) {
            WARN("can't notify client !\n");
            return MMSYSERR_ERROR;
        }
        break;
    default:
        FIXME("Unknown callback message %u\n", wMsg);
        return MMSYSERR_INVALPARAM;
    }
    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                      widGetDevCaps                           [internal]
 */
static DWORD widGetDevCaps(WORD wDevID, LPWAVEINCAPSA lpCaps, DWORD dwSize)
{
    TRACE("(%u, %p, %lu);\n", wDevID, lpCaps, dwSize);

    if (lpCaps == NULL) return MMSYSERR_NOTENABLED;

    if (wDevID >= MAX_WAVEINDRV) {
        TRACE("MAX_WAVINDRV reached !\n");
        return MMSYSERR_BADDEVICEID;
    }

    memcpy(lpCaps, &WInDev[wDevID].caps, min(dwSize, sizeof(*lpCaps)));
    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                              widRecorder                     [internal]
 */
static  DWORD   CALLBACK        widRecorder(LPVOID pmt)
{
    WORD                uDevID = (DWORD)pmt;
    WINE_WAVEIN*        wwi = (WINE_WAVEIN*)&WInDev[uDevID];
    WAVEHDR*            lpWaveHdr;
    DWORD               dwSleepTime;
    DWORD               bytesRead;
    int                 dwBufferSpace;
    enum win_wm_message msg;
    DWORD               param;
    HANDLE              ev;

    SetEvent(wwi->hStartUpEvent);

    /* make sleep time to be # of ms to record one packet */
    dwSleepTime = ((1 << (wwi->packetSettings & 0xFFFF)) * 1000) / wwi->format.wf.nAvgBytesPerSec;
    TRACE("sleeptime=%ld ms\n", dwSleepTime);

    for(;;) {
        /* Oddly enough, dwBufferSpace is sometimes negative.... 
         * 
         * NOTE: If you remove this call to arts_stream_get() and
         * remove the && (dwBufferSpace > 0) the code will still
         * function correctly. I don't know which way is
         * faster/better.
         */
        dwBufferSpace = arts_stream_get(wwi->record_stream, ARTS_P_BUFFER_SPACE);
        TRACE("wwi->lpQueuePtr=(%p), wwi->state=(%d), dwBufferSpace=(%d)\n",wwi->lpQueuePtr,wwi->state,dwBufferSpace);

        /* read all data is arts input buffer. */
        if ((wwi->lpQueuePtr != NULL) && (wwi->state == WINE_WS_PLAYING) && (dwBufferSpace > 0))
        {
            lpWaveHdr = wwi->lpQueuePtr;
                
            TRACE("read as much as we can\n");
            while(wwi->lpQueuePtr)
            {
                TRACE("attempt to read %ld bytes\n",lpWaveHdr->dwBufferLength - lpWaveHdr->dwBytesRecorded);
                bytesRead = arts_read(wwi->record_stream,
                                      lpWaveHdr->lpData + lpWaveHdr->dwBytesRecorded,
                                      lpWaveHdr->dwBufferLength - lpWaveHdr->dwBytesRecorded);
                TRACE("bytesRead=%ld\n",bytesRead);
                if (bytesRead==0) break;
                
                lpWaveHdr->dwBytesRecorded      += bytesRead;
                wwi->dwRecordedTotal            += bytesRead;

                /* buffer full. notify client */
                if (lpWaveHdr->dwBytesRecorded >= lpWaveHdr->dwBufferLength)
                {
                    /* must copy the value of next waveHdr, because we have no idea of what
                     * will be done with the content of lpWaveHdr in callback
                     */
                    LPWAVEHDR   lpNext = lpWaveHdr->lpNext;

                    TRACE("waveHdr full.\n");
                    
                    lpWaveHdr->dwFlags &= ~WHDR_INQUEUE;
                    lpWaveHdr->dwFlags |=  WHDR_DONE;
                    
                    widNotifyClient(wwi, WIM_DATA, (DWORD)lpWaveHdr, 0);
                    lpWaveHdr = wwi->lpQueuePtr = lpNext;
                }
            }
        }

        /* wait for dwSleepTime or an event in thread's queue */
        WaitForSingleObject(wwi->msgRing.msg_event, dwSleepTime);

        while (ARTS_RetrieveRingMessage(&wwi->msgRing, &msg, &param, &ev))
        {
            TRACE("msg=%s param=0x%lx\n",wodPlayerCmdString[msg - WM_USER - 1], param);
            switch(msg) {
            case WINE_WM_PAUSING:
                wwi->state = WINE_WS_PAUSED;

                /* Put code here to "pause" arts recording
                 */

                SetEvent(ev);
                break;
            case WINE_WM_STARTING:
                wwi->state = WINE_WS_PLAYING;

                /* Put code here to "start" arts recording
                 */

                SetEvent(ev);
                break;
            case WINE_WM_HEADER:
                lpWaveHdr = (LPWAVEHDR)param;
                /* insert buffer at end of queue */
                {
                    LPWAVEHDR* wh;
                    int num_headers = 0;
                    for (wh = &(wwi->lpQueuePtr); *wh; wh = &((*wh)->lpNext))
                    {
                        num_headers++;

                    }
                    *wh=lpWaveHdr;
                }
                break;
            case WINE_WM_STOPPING:
                if (wwi->state != WINE_WS_STOPPED)
                {

                    /* Put code here to "stop" arts recording
                     */

                    /* return current buffer to app */
                    lpWaveHdr = wwi->lpQueuePtr;
                    if (lpWaveHdr)
                    {
                        LPWAVEHDR lpNext = lpWaveHdr->lpNext;
                        TRACE("stop %p %p\n", lpWaveHdr, lpWaveHdr->lpNext);
                        lpWaveHdr->dwFlags &= ~WHDR_INQUEUE;
                        lpWaveHdr->dwFlags |= WHDR_DONE;
                        widNotifyClient(wwi, WIM_DATA, (DWORD)lpWaveHdr, 0);
                        wwi->lpQueuePtr = lpNext;
                    }
                }
                wwi->state = WINE_WS_STOPPED;
                SetEvent(ev);
                break;
            case WINE_WM_RESETTING:
                wwi->state = WINE_WS_STOPPED;
                wwi->dwRecordedTotal = 0;

                /* return all buffers to the app */
                for (lpWaveHdr = wwi->lpQueuePtr; lpWaveHdr; lpWaveHdr = lpWaveHdr->lpNext) {
                    TRACE("reset %p %p\n", lpWaveHdr, lpWaveHdr->lpNext);
                    lpWaveHdr->dwFlags &= ~WHDR_INQUEUE;
                    lpWaveHdr->dwFlags |= WHDR_DONE;

                    widNotifyClient(wwi, WIM_DATA, (DWORD)lpWaveHdr, 0);
                }
                wwi->lpQueuePtr = NULL; 
                SetEvent(ev);
                break;
            case WINE_WM_CLOSING:
                wwi->hThread = 0;
                wwi->state = WINE_WS_CLOSED;
                SetEvent(ev);
                ExitThread(0);
                /* shouldn't go here */
            default:
                FIXME("unknown message %d\n", msg);
                break;
            }
        }
    }
    ExitThread(0);
    /* just for not generating compilation warnings... should never be executed */
    return 0;
}

/**************************************************************************
 *                              widOpen                         [internal]
 */
static DWORD widOpen(WORD wDevID, LPWAVEOPENDESC lpDesc, DWORD dwFlags)
{
    WINE_WAVEIN*        wwi;

    TRACE("(%u, %p %08lX);\n",wDevID, lpDesc, dwFlags);
    if (lpDesc == NULL) {
        WARN("Invalid Parametr (lpDesc == NULL)!\n");
        return MMSYSERR_INVALPARAM;
    }

    if (wDevID >= MAX_WAVEINDRV) {
        TRACE ("MAX_WAVEINDRV reached !\n");
        return MMSYSERR_BADDEVICEID;
    }

    /* if this device is already open tell the app that it is allocated */
    if(WInDev[wDevID].record_stream != (arts_stream_t*)-1)
    {
        TRACE("device already allocated\n");
        return MMSYSERR_ALLOCATED;
    }

    /* only PCM format is support so far... */
    if (lpDesc->lpFormat->wFormatTag != WAVE_FORMAT_PCM ||
        lpDesc->lpFormat->nChannels == 0 ||
        lpDesc->lpFormat->nSamplesPerSec == 0) {
        WARN("Bad format: tag=%04X nChannels=%d nSamplesPerSec=%ld !\n",
             lpDesc->lpFormat->wFormatTag, lpDesc->lpFormat->nChannels,
             lpDesc->lpFormat->nSamplesPerSec);
        return WAVERR_BADFORMAT;
    }

    if (dwFlags & WAVE_FORMAT_QUERY) {
        TRACE("Query format: tag=%04X nChannels=%d nSamplesPerSec=%ld !\n",
             lpDesc->lpFormat->wFormatTag, lpDesc->lpFormat->nChannels,
             lpDesc->lpFormat->nSamplesPerSec);
        return MMSYSERR_NOERROR;
    }

    wwi = &WInDev[wDevID];

    /* direct sound not supported, ignore the flag */
    dwFlags &= ~WAVE_DIRECTSOUND;

    wwi->wFlags = HIWORD(dwFlags & CALLBACK_TYPEMASK);
    
    memcpy(&wwi->waveDesc, lpDesc,           sizeof(WAVEOPENDESC));
    memcpy(&wwi->format,   lpDesc->lpFormat, sizeof(PCMWAVEFORMAT));

    if (wwi->format.wBitsPerSample == 0) {
        WARN("Resetting zerod wBitsPerSample\n");
        wwi->format.wBitsPerSample = 8 *
            (wwi->format.wf.nAvgBytesPerSec /
             wwi->format.wf.nSamplesPerSec) /
            wwi->format.wf.nChannels;
    }

    wwi->record_stream = arts_record_stream(wwi->format.wf.nSamplesPerSec,
                                            wwi->format.wBitsPerSample,
                                            wwi->format.wf.nChannels,
                                            "winearts");
    TRACE("(wwi->record_stream=%p)\n",wwi->record_stream);
    wwi->state = WINE_WS_STOPPED;

    wwi->packetSettings = arts_stream_set(wwi->record_stream, ARTS_P_PACKET_SETTINGS, WAVEIN_PACKET_SETTINGS);
    TRACE("Tried to set ARTS_P_PACKET_SETTINGS to (%x), actually set to (%x)\n", WAVEIN_PACKET_SETTINGS, wwi->packetSettings);
    TRACE("Buffer size is now (%d)\n", arts_stream_get(wwi->record_stream, ARTS_P_BUFFER_SIZE));

    if (wwi->lpQueuePtr) {
        WARN("Should have an empty queue (%p)\n", wwi->lpQueuePtr);
        wwi->lpQueuePtr = NULL;
    }
    arts_stream_set(wwi->record_stream, ARTS_P_BLOCKING, 0);    /* disable blocking on this stream */

    if(!wwi->record_stream) return MMSYSERR_ALLOCATED;

    wwi->dwRecordedTotal = 0;
    wwi->wFlags = HIWORD(dwFlags & CALLBACK_TYPEMASK);

    ARTS_InitRingMessage(&wwi->msgRing);

    /* create recorder thread */
    if (!(dwFlags & WAVE_DIRECTSOUND)) {
        wwi->hStartUpEvent = CreateEventA(NULL, FALSE, FALSE, NULL);
        wwi->hThread = CreateThread(NULL, 0, widRecorder, (LPVOID)(DWORD)wDevID, 0, &(wwi->dwThreadID));
        WaitForSingleObject(wwi->hStartUpEvent, INFINITE);
        CloseHandle(wwi->hStartUpEvent);
    } else {
        wwi->hThread = INVALID_HANDLE_VALUE;
        wwi->dwThreadID = 0;
    }
    wwi->hStartUpEvent = INVALID_HANDLE_VALUE;

    TRACE("wBitsPerSample=%u, nAvgBytesPerSec=%lu, nSamplesPerSec=%lu, nChannels=%u nBlockAlign=%u!\n",
          wwi->format.wBitsPerSample, wwi->format.wf.nAvgBytesPerSec,
          wwi->format.wf.nSamplesPerSec, wwi->format.wf.nChannels,
          wwi->format.wf.nBlockAlign);
    return widNotifyClient(wwi, WIM_OPEN, 0L, 0L);
}

/**************************************************************************
 *                              widClose                        [internal]
 */
static DWORD widClose(WORD wDevID)
{
    WINE_WAVEIN*        wwi;

    TRACE("(%u);\n", wDevID);
    if (wDevID >= MAX_WAVEINDRV || WInDev[wDevID].state == WINE_WS_CLOSED) {
        WARN("can't close !\n");
        return MMSYSERR_INVALHANDLE;
    }

    wwi = &WInDev[wDevID];

    if (wwi->lpQueuePtr != NULL) {
        WARN("still buffers open !\n");
        return WAVERR_STILLPLAYING;
    }

    ARTS_AddRingMessage(&wwi->msgRing, WINE_WM_CLOSING, 0, TRUE);
    ARTS_CloseWaveInDevice(wwi);
    wwi->state = WINE_WS_CLOSED;
    ARTS_DestroyRingMessage(&wwi->msgRing);
    return widNotifyClient(wwi, WIM_CLOSE, 0L, 0L);
}

/**************************************************************************
 *                              widAddBuffer            [internal]
 */
static DWORD widAddBuffer(WORD wDevID, LPWAVEHDR lpWaveHdr, DWORD dwSize)
{
    TRACE("(%u, %p, %08lX);\n", wDevID, lpWaveHdr, dwSize);

    if (wDevID >= MAX_WAVEINDRV || WInDev[wDevID].state == WINE_WS_CLOSED) {
        WARN("can't do it !\n");
        return MMSYSERR_INVALHANDLE;
    }
    if (!(lpWaveHdr->dwFlags & WHDR_PREPARED)) {
        TRACE("never been prepared !\n");
        return WAVERR_UNPREPARED;
    }
    if (lpWaveHdr->dwFlags & WHDR_INQUEUE) {
        TRACE("header already in use !\n");
        return WAVERR_STILLPLAYING;
    }

    lpWaveHdr->dwFlags |= WHDR_INQUEUE;
    lpWaveHdr->dwFlags &= ~WHDR_DONE;
    lpWaveHdr->dwBytesRecorded = 0;
    lpWaveHdr->lpNext = NULL;

    ARTS_AddRingMessage(&WInDev[wDevID].msgRing, WINE_WM_HEADER, (DWORD)lpWaveHdr, FALSE);
    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                              widPrepare                      [internal]
 */
static DWORD widPrepare(WORD wDevID, LPWAVEHDR lpWaveHdr, DWORD dwSize)
{
    TRACE("(%u, %p, %08lX);\n", wDevID, lpWaveHdr, dwSize);

    if (wDevID >= MAX_WAVEINDRV) return MMSYSERR_INVALHANDLE;

    if (lpWaveHdr->dwFlags & WHDR_INQUEUE)
        return WAVERR_STILLPLAYING;

    lpWaveHdr->dwFlags |= WHDR_PREPARED;
    lpWaveHdr->dwFlags &= ~WHDR_DONE;
    lpWaveHdr->dwBytesRecorded = 0;

    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                              widUnprepare                    [internal]
 */
static DWORD widUnprepare(WORD wDevID, LPWAVEHDR lpWaveHdr, DWORD dwSize)
{
    TRACE("(%u, %p, %08lX);\n", wDevID, lpWaveHdr, dwSize);
    if (wDevID >= MAX_WAVEINDRV) {
        WARN("bad device ID !\n");
        return MMSYSERR_INVALHANDLE;
    }

    if (lpWaveHdr->dwFlags & WHDR_INQUEUE) {
        TRACE("Still playing...\n");
        return WAVERR_STILLPLAYING;
    }

    lpWaveHdr->dwFlags &= ~WHDR_PREPARED;
    lpWaveHdr->dwFlags |= WHDR_DONE;

    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                      widStart                                [internal]
 */
static DWORD widStart(WORD wDevID)
{
    TRACE("(%u);\n", wDevID);
    if (wDevID >= MAX_WAVEINDRV || WInDev[wDevID].state == WINE_WS_CLOSED) {
        WARN("can't start recording !\n");
        return MMSYSERR_INVALHANDLE;
    }

    ARTS_AddRingMessage(&WInDev[wDevID].msgRing, WINE_WM_STARTING, 0, TRUE);
    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                      widStop                                 [internal]
 */
static DWORD widStop(WORD wDevID)
{
    TRACE("(%u);\n", wDevID);
    if (wDevID >= MAX_WAVEINDRV || WInDev[wDevID].state == WINE_WS_CLOSED) {
        WARN("can't stop !\n");
        return MMSYSERR_INVALHANDLE;
    }

    ARTS_AddRingMessage(&WInDev[wDevID].msgRing, WINE_WM_STOPPING, 0, TRUE);

    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                      widReset                                [internal]
 */
static DWORD widReset(WORD wDevID)
{
    TRACE("(%u);\n", wDevID);
    if (wDevID >= MAX_WAVEINDRV || WInDev[wDevID].state == WINE_WS_CLOSED) {
        WARN("can't reset !\n");
        return MMSYSERR_INVALHANDLE;
    }
    ARTS_AddRingMessage(&WInDev[wDevID].msgRing, WINE_WM_RESETTING, 0, TRUE);
    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                              widMessage (WINEARTS.6)
 */
DWORD WINAPI ARTS_widMessage(UINT wDevID, UINT wMsg, DWORD dwUser,
                            DWORD dwParam1, DWORD 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          (wDevID, (LPWAVEOPENDESC)dwParam1,      dwParam2);
    case WIDM_CLOSE:            return widClose         (wDevID);
    case WIDM_ADDBUFFER:        return widAddBuffer     (wDevID, (LPWAVEHDR)dwParam1, dwParam2);
    case WIDM_PREPARE:          return widPrepare       (wDevID, (LPWAVEHDR)dwParam1, dwParam2);
    case WIDM_UNPREPARE:        return widUnprepare     (wDevID, (LPWAVEHDR)dwParam1, dwParam2);
    case WIDM_GETDEVCAPS:       return widGetDevCaps    (wDevID, (LPWAVEINCAPSA)dwParam1,       dwParam2);
    case WIDM_GETNUMDEVS:       return widGetNumDevs    ();
    case WIDM_RESET:            return widReset         (wDevID);
    case WIDM_START:            return widStart         (wDevID);
    case WIDM_STOP:             return widStop          (wDevID);
    default:
        FIXME("unknown message %d!\n", wMsg);
    }
    return MMSYSERR_NOTSUPPORTED;
}

/*======================================================================*
 *                  Low level DSOUND implementation                     *
 *======================================================================*/
static DWORD wodDsCreate(UINT wDevID, PIDSDRIVER* drv)
{
    /* we can't perform memory mapping as we don't have a file stream
        interface with arts like we do with oss */
    MESSAGE("This sound card's driver does not support direct access\n");
    MESSAGE("The (slower) DirectSound HEL mode will be used instead.\n");
    return MMSYSERR_NOTSUPPORTED;
}

static DWORD wodDsDesc(UINT wDevID, PDSDRIVERDESC desc)
{
    memset(desc, 0, sizeof(*desc));
    strcpy(desc->szDesc, "Wine aRts DirectSound Driver");
    strcpy(desc->szDrvName, "winearts.drv");
    return MMSYSERR_NOERROR;
}

static DWORD wodDsGuid(UINT wDevID, LPGUID pGuid)
{
    memcpy(pGuid, &DSDEVID_DefaultPlayback, sizeof(GUID));
    return MMSYSERR_NOERROR;
}

#else /* !HAVE_ARTS */

/**************************************************************************
 *                              wodMessage (WINEARTS.@)
 */
DWORD WINAPI ARTS_wodMessage(WORD wDevID, WORD wMsg, DWORD dwUser,
                            DWORD dwParam1, DWORD dwParam2)
{
    FIXME("(%u, %04X, %08lX, %08lX, %08lX):stub\n", wDevID, wMsg, dwUser, dwParam1, dwParam2);
    return MMSYSERR_NOTENABLED;
}

/**************************************************************************
 *                              widMessage (WINEARTS.6)
 */
DWORD WINAPI ARTS_widMessage(UINT wDevID, UINT wMsg, DWORD dwUser,
                            DWORD dwParam1, DWORD dwParam2)
{
    FIXME("(%u, %04X, %08lX, %08lX, %08lX):stub\n", wDevID, wMsg, dwUser, dwParam1, dwParam2);
    return MMSYSERR_NOTENABLED;
}

#endif /* HAVE_ARTS */