msvideo_main.c

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/*
 * Copyright 1998 Marcus Meissner
 * Copyright 2000 Bradley Baetz
 * Copyright 2003 Michael Günnewig
 * Copyright 2005 Dmitry Timoshkov
 *
 * 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
 *
 * FIXME: This all assumes 32 bit codecs
 *      Win95 appears to prefer 32 bit codecs, even from 16 bit code.
 *      There is the ICOpenFunction16 to worry about still, though.
 *      
 * TODO
 *      - no thread safety
 */

#include <stdarg.h>
#include <stdio.h>
#include <string.h>

#include "windef.h"
#include "winbase.h"
#include "winreg.h"
#include "winnls.h"
#include "wingdi.h"
#include "winuser.h"
#include "commdlg.h"
#include "vfw.h"
#include "msvideo_private.h"
#include "wine/debug.h"

/* Drivers32 settings */
#define HKLM_DRIVERS32 "Software\\Microsoft\\Windows NT\\CurrentVersion\\Drivers32"

WINE_DEFAULT_DEBUG_CHANNEL(msvideo);

/* This one is a macro in order to work for both ASCII and Unicode */
#define fourcc_to_string(str, fcc) do { \
    (str)[0] = LOBYTE(LOWORD(fcc)); \
    (str)[1] = HIBYTE(LOWORD(fcc)); \
    (str)[2] = LOBYTE(HIWORD(fcc)); \
    (str)[3] = HIBYTE(HIWORD(fcc)); \
    } while(0)

static inline const char *wine_dbgstr_fcc( DWORD fcc )
{
    char fcc_str[5];
    fourcc_to_string(fcc_str, fcc);
    fcc_str[4] = '\0';
    /* Last byte may be ' ' in some cases like "DIB " */
    if (isalnum(fcc_str[0]) && isalnum(fcc_str[1]) && isalnum(fcc_str[2])
    && (isalnum(fcc_str[3]) || isspace(fcc_str[3])))
        return wine_dbg_sprintf("%s", fcc_str);
    return wine_dbg_sprintf("0x%08x", fcc);
}

static const char *wine_dbgstr_icerr( int ret )
{
    const char *str;
    if (ret <= ICERR_CUSTOM)
        return wine_dbg_sprintf("ICERR_CUSTOM (%d)", ret);
#define XX(x) case (x): str = #x; break
    switch (ret)
    {
        XX(ICERR_OK);
        XX(ICERR_DONTDRAW);
        XX(ICERR_NEWPALETTE);
        XX(ICERR_GOTOKEYFRAME);
        XX(ICERR_STOPDRAWING);
        XX(ICERR_UNSUPPORTED);
        XX(ICERR_BADFORMAT);
        XX(ICERR_MEMORY);
        XX(ICERR_INTERNAL);
        XX(ICERR_BADFLAGS);
        XX(ICERR_BADPARAM);
        XX(ICERR_BADSIZE);
        XX(ICERR_BADHANDLE);
        XX(ICERR_CANTUPDATE);
        XX(ICERR_ABORT);
        XX(ICERR_ERROR);
        XX(ICERR_BADBITDEPTH);
        XX(ICERR_BADIMAGESIZE);
        default: str = wine_dbg_sprintf("UNKNOWN (%d)", ret);
    }
#undef XX
    return str;
}

static WINE_HIC*        MSVIDEO_FirstHic /* = NULL */;

typedef struct _reg_driver reg_driver;
struct _reg_driver
{
    DWORD       fccType;
    DWORD       fccHandler;
    DRIVERPROC  proc;
    LPWSTR      name;
    reg_driver* next;
};

static reg_driver* reg_driver_list = NULL;

HMODULE MSVFW32_hModule;

BOOL WINAPI DllMain( HINSTANCE hinst, DWORD reason, LPVOID reserved )
{
    TRACE("%p,%x,%p\n", hinst, reason, reserved);

    switch(reason)
    {
        case DLL_PROCESS_ATTACH:
            DisableThreadLibraryCalls(hinst);
            MSVFW32_hModule = hinst;
            break;
    }
    return TRUE;
}

/******************************************************************
 *      MSVIDEO_SendMessage
 *
 *
 */
static LRESULT MSVIDEO_SendMessage(WINE_HIC* whic, UINT msg, DWORD_PTR lParam1, DWORD_PTR lParam2)
{
    LRESULT     ret;

#define XX(x) case x: TRACE("(%p,"#x",0x%08lx,0x%08lx)\n",whic,lParam1,lParam2); break

    switch (msg) {
        /* DRV_* */
        XX(DRV_LOAD);
        XX(DRV_ENABLE);
        XX(DRV_OPEN);
        XX(DRV_CLOSE);
        XX(DRV_DISABLE);
        XX(DRV_FREE);
        /* ICM_RESERVED+X */
        XX(ICM_ABOUT);
        XX(ICM_CONFIGURE);
        XX(ICM_GET);
        XX(ICM_GETINFO);
        XX(ICM_GETDEFAULTQUALITY);
        XX(ICM_GETQUALITY);
        XX(ICM_GETSTATE);
        XX(ICM_SETQUALITY);
        XX(ICM_SET);
        XX(ICM_SETSTATE);
        /* ICM_USER+X */
        XX(ICM_COMPRESS_FRAMES_INFO);
        XX(ICM_COMPRESS_GET_FORMAT);
        XX(ICM_COMPRESS_GET_SIZE);
        XX(ICM_COMPRESS_QUERY);
        XX(ICM_COMPRESS_BEGIN);
        XX(ICM_COMPRESS);
        XX(ICM_COMPRESS_END);
        XX(ICM_DECOMPRESS_GET_FORMAT);
        XX(ICM_DECOMPRESS_QUERY);
        XX(ICM_DECOMPRESS_BEGIN);
        XX(ICM_DECOMPRESS);
        XX(ICM_DECOMPRESS_END);
        XX(ICM_DECOMPRESS_SET_PALETTE);
        XX(ICM_DECOMPRESS_GET_PALETTE);
        XX(ICM_DRAW_QUERY);
        XX(ICM_DRAW_BEGIN);
        XX(ICM_DRAW_GET_PALETTE);
        XX(ICM_DRAW_START);
        XX(ICM_DRAW_STOP);
        XX(ICM_DRAW_END);
        XX(ICM_DRAW_GETTIME);
        XX(ICM_DRAW);
        XX(ICM_DRAW_WINDOW);
        XX(ICM_DRAW_SETTIME);
        XX(ICM_DRAW_REALIZE);
        XX(ICM_DRAW_FLUSH);
        XX(ICM_DRAW_RENDERBUFFER);
        XX(ICM_DRAW_START_PLAY);
        XX(ICM_DRAW_STOP_PLAY);
        XX(ICM_DRAW_SUGGESTFORMAT);
        XX(ICM_DRAW_CHANGEPALETTE);
        XX(ICM_GETBUFFERSWANTED);
        XX(ICM_GETDEFAULTKEYFRAMERATE);
        XX(ICM_DECOMPRESSEX_BEGIN);
        XX(ICM_DECOMPRESSEX_QUERY);
        XX(ICM_DECOMPRESSEX);
        XX(ICM_DECOMPRESSEX_END);
        XX(ICM_SET_STATUS_PROC);
    default:
        FIXME("(%p,0x%08x,0x%08lx,0x%08lx) unknown message\n",whic,msg,lParam1,lParam2);
    }

#undef XX

    if (whic->driverproc) {
    /* dwDriverId parameter is the value returned by the DRV_OPEN */
        ret = whic->driverproc(whic->driverId, whic->hdrv, msg, lParam1, lParam2);
    } else {
        ret = SendDriverMessage(whic->hdrv, msg, lParam1, lParam2);
    }

    TRACE(" -> %s\n", wine_dbgstr_icerr(ret));
    return ret;
}

static int compare_fourcc(DWORD fcc1, DWORD fcc2)
{
  char fcc_str1[4];
  char fcc_str2[4];
  fourcc_to_string(fcc_str1, fcc1);
  fourcc_to_string(fcc_str2, fcc2);
  return strncasecmp(fcc_str1, fcc_str2, 4);
}

static DWORD get_size_image(LONG width, LONG height, WORD depth)
{
    DWORD ret = width * depth;
    ret = (ret + 7) / 8;    /* divide by byte size, rounding up */
    ret = (ret + 3) & ~3;   /* align to 4 bytes */
    ret *= abs(height);
    return ret;
}

typedef BOOL (*enum_handler_t)(const char *name, const char *driver, unsigned int index, void *param);

static BOOL enum_drivers(DWORD fccType, enum_handler_t handler, void* param)
{
    char fccTypeStr[4];
    char name_buf[10];
    char buf[2048];

    DWORD i, cnt = 0, lRet;
    BOOL result = FALSE;
    HKEY hKey;

    fourcc_to_string(fccTypeStr, fccType);

    /* first, go through the registry entries */
    lRet = RegOpenKeyExA(HKEY_LOCAL_MACHINE, HKLM_DRIVERS32, 0, KEY_QUERY_VALUE, &hKey);
    if (lRet == ERROR_SUCCESS) 
    {
        i = 0;
        for (;;)
        {
            DWORD name_len = 10, driver_len = 128;
            lRet = RegEnumValueA(hKey, i++, name_buf, &name_len, 0, 0, (BYTE *)buf, &driver_len);
            if (lRet == ERROR_NO_MORE_ITEMS) break;
            if (name_len != 9 || name_buf[4] != '.') continue;
            if (fccType && strncasecmp(name_buf, fccTypeStr, 4)) continue;
            if ((result = handler(name_buf, buf, cnt++, param))) break;
        }
        RegCloseKey( hKey );
    }
    if (result) return result;

    /* if that didn't work, go through the values in system.ini */
    if (GetPrivateProfileSectionA("drivers32", buf, sizeof(buf), "system.ini")) 
    {
        char *s;
        for (s = buf; *s; s += strlen(s) + 1)
        {
            if (s[4] != '.' || s[9] != '=') continue;
            if (fccType && strncasecmp(s, fccTypeStr, 4)) continue;
            if ((result = handler(s, s + 10, cnt++, param))) break;
        }
    }

    return result;
}

/******************************************************************
 *      MSVIDEO_GetHicPtr
 *
 *
 */
static WINE_HIC*   MSVIDEO_GetHicPtr(HIC hic)
{
    WINE_HIC*   whic;

    for (whic = MSVIDEO_FirstHic; whic && whic->hic != hic; whic = whic->next);
    return whic;
}

/***********************************************************************
 *      VideoForWindowsVersion      [MSVFW32.2]
 *      VideoForWindowsVersion      [MSVIDEO.2]
 * Returns the version in major.minor form.
 * In Windows95 this returns 0x040003b6 (4.950)
 */
DWORD WINAPI VideoForWindowsVersion(void) 
{
    return 0x040003B6; /* 4.950 */
}

static BOOL ICInfo_enum_handler(const char *name, const char *driver, unsigned int nr, void *param)
{
    ICINFO *lpicinfo = param;
    DWORD fccType = mmioStringToFOURCCA(name, 0);
    DWORD fccHandler = mmioStringToFOURCCA(name + 5, 0);

    if (lpicinfo->fccHandler != nr && compare_fourcc(lpicinfo->fccHandler, fccHandler))
        return FALSE;

    lpicinfo->fccType = fccType;
    lpicinfo->fccHandler = fccHandler;
    lpicinfo->dwFlags = 0;
    lpicinfo->dwVersion = 0;
    lpicinfo->dwVersionICM = ICVERSION;
    lpicinfo->szName[0] = 0;
    lpicinfo->szDescription[0] = 0;
    MultiByteToWideChar(CP_ACP, 0, driver, -1, lpicinfo->szDriver, ARRAY_SIZE(lpicinfo->szDriver));

    return TRUE;
}

/***********************************************************************
 *      ICInfo              [MSVFW32.@]
 * Get information about an installable compressor. Return TRUE if there
 * is one.
 *
 * PARAMS
 *   fccType     [I] type of compressor (e.g. 'vidc')
 *   fccHandler  [I] real fcc for handler or <n>th compressor
 *   lpicinfo    [O] information about compressor
 */
BOOL VFWAPI ICInfo( DWORD fccType, DWORD fccHandler, ICINFO *lpicinfo)
{
    TRACE("(%s,%s,%p)\n",
          wine_dbgstr_fcc(fccType), wine_dbgstr_fcc(fccHandler), lpicinfo);

    lpicinfo->fccType = fccType;
    lpicinfo->fccHandler = fccHandler;
    return enum_drivers(fccType, ICInfo_enum_handler, lpicinfo);
}

static DWORD IC_HandleRef = 1;

/***********************************************************************
 *      ICInstall           [MSVFW32.@]
 */
BOOL VFWAPI ICInstall(DWORD fccType, DWORD fccHandler, LPARAM lParam, LPSTR szDesc, UINT wFlags) 
{
    reg_driver* driver;
    unsigned len;

    TRACE("(%s,%s,%p,%p,0x%08x)\n", wine_dbgstr_fcc(fccType), wine_dbgstr_fcc(fccHandler), (void*)lParam, szDesc, wFlags);

    /* Check if a driver is already registered */
    for (driver = reg_driver_list; driver; driver = driver->next)
    {
        if (!compare_fourcc(fccType, driver->fccType) &&
            !compare_fourcc(fccHandler, driver->fccHandler))
            break;
    }
    if (driver) return FALSE;

    /* Register the driver */
    driver = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(reg_driver));
    if (!driver) goto oom;
    driver->fccType = fccType;
    driver->fccHandler = fccHandler;

    switch(wFlags)
    {
    case ICINSTALL_FUNCTION:
        driver->proc = (DRIVERPROC)lParam;
    driver->name = NULL;
        break;
    case ICINSTALL_DRIVER:
    driver->proc = NULL;
        len = MultiByteToWideChar(CP_ACP, 0, (char*)lParam, -1, NULL, 0);
        driver->name = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR));
        if (!driver->name) goto oom;
        MultiByteToWideChar(CP_ACP, 0, (char*)lParam, -1, driver->name, len);
    break;
    default:
    ERR("Invalid flags!\n");
    HeapFree(GetProcessHeap(), 0, driver);
    return FALSE;
   }

   /* Insert our driver in the list*/
   driver->next = reg_driver_list;
   reg_driver_list = driver;
    
   return TRUE;
oom:
   HeapFree(GetProcessHeap(), 0, driver);
   return FALSE;
}

/***********************************************************************
 *      ICRemove            [MSVFW32.@]
 */
BOOL VFWAPI ICRemove(DWORD fccType, DWORD fccHandler, UINT wFlags) 
{
    reg_driver** pdriver;
    reg_driver*  drv;

    TRACE("(%s,%s,0x%08x)\n", wine_dbgstr_fcc(fccType), wine_dbgstr_fcc(fccHandler), wFlags);

    /* Check if a driver is already registered */
    for (pdriver = &reg_driver_list; *pdriver; pdriver = &(*pdriver)->next)
    {
        if (!compare_fourcc(fccType, (*pdriver)->fccType) &&
            !compare_fourcc(fccHandler, (*pdriver)->fccHandler))
            break;
    }
    if (!*pdriver)
        return FALSE;

    /* Remove the driver from the list */
    drv = *pdriver;
    *pdriver = (*pdriver)->next;
    HeapFree(GetProcessHeap(), 0, drv->name);
    HeapFree(GetProcessHeap(), 0, drv);
    
    return TRUE;  
}


/***********************************************************************
 *      ICOpen              [MSVFW32.@]
 * Opens an installable compressor. Return special handle.
 */
HIC VFWAPI ICOpen(DWORD fccType, DWORD fccHandler, UINT wMode) 
{
    WCHAR       codecname[10];
    ICOPEN      icopen;
    HDRVR       hdrv;
    WINE_HIC*           whic;
    static const WCHAR  drv32W[] = {'d','r','i','v','e','r','s','3','2','\0'};
    reg_driver*         driver;

    TRACE("(%s,%s,0x%08x)\n", wine_dbgstr_fcc(fccType), wine_dbgstr_fcc(fccHandler), wMode);

    if (!fccHandler) /* No specific handler, return the first valid for wMode */
    {
        HIC local;
        ICINFO info;
        DWORD loop = 0;
        info.dwSize = sizeof(info);
        while(ICInfo(fccType, loop++, &info))
        {
            /* Ensure fccHandler is not 0x0 because we will recurse on ICOpen */
            if(!info.fccHandler)
                continue;
            local = ICOpen(fccType, info.fccHandler, wMode);
            if (local != 0)
            {
                TRACE("Returning %s as default handler for %s\n",
                      wine_dbgstr_fcc(info.fccHandler), wine_dbgstr_fcc(fccType));
                return local;
            }
        }
    }

    /* Check if there is a registered driver that matches */
    driver = reg_driver_list;
    while(driver)
        if (!compare_fourcc(fccType, driver->fccType) &&
            !compare_fourcc(fccHandler, driver->fccHandler)) {
        fccType = driver->fccType;
        fccHandler = driver->fccHandler;
        break;
        } else
            driver = driver->next;

    if (driver && driver->proc)
        /* The driver has been registered at runtime with its driverproc */
        return ICOpenFunction(fccType, fccHandler, wMode, driver->proc);
  
    /* Well, lParam2 is in fact a LPVIDEO_OPEN_PARMS, but it has the
     * same layout as ICOPEN
     */
    icopen.dwSize      = sizeof(ICOPEN);
    icopen.fccType     = fccType;
    icopen.fccHandler  = fccHandler;
    icopen.dwVersion   = 0x00001000; /* FIXME */
    icopen.dwFlags     = wMode;
    icopen.dwError     = 0;
    icopen.pV1Reserved = NULL;
    icopen.pV2Reserved = NULL;
    icopen.dnDevNode   = 0; /* FIXME */

    if (!driver) {
        /* normalize to lower case as in 'vidc' */
        ((char*)&fccType)[0] = tolower(((char*)&fccType)[0]);
        ((char*)&fccType)[1] = tolower(((char*)&fccType)[1]);
        ((char*)&fccType)[2] = tolower(((char*)&fccType)[2]);
        ((char*)&fccType)[3] = tolower(((char*)&fccType)[3]);
        icopen.fccType = fccType;
        /* Seek the driver in the registry */
        fourcc_to_string(codecname, fccType);
        codecname[4] = '.';
        fourcc_to_string(codecname + 5, fccHandler);
        codecname[9] = '\0';

        hdrv = OpenDriver(codecname, drv32W, (LPARAM)&icopen);
        if (!hdrv)
            return 0;
    } else {
        /* The driver has been registered at runtime with its name */
        hdrv = OpenDriver(driver->name, NULL, (LPARAM)&icopen);
        if (!hdrv) 
            return 0; 
    }

    whic = HeapAlloc(GetProcessHeap(), 0, sizeof(WINE_HIC));
    if (!whic)
    {
        CloseDriver(hdrv, 0, 0);
        return FALSE;
    }
    whic->hdrv          = hdrv;
    whic->driverproc    = NULL;
    whic->type          = fccType;
    whic->handler       = fccHandler;
    while (MSVIDEO_GetHicPtr((HIC)(ULONG_PTR)IC_HandleRef) != NULL) IC_HandleRef++;
    whic->hic           = (HIC)(ULONG_PTR)IC_HandleRef++;
    whic->next          = MSVIDEO_FirstHic;
    MSVIDEO_FirstHic = whic;

    TRACE("=> %p\n", whic->hic);
    return whic->hic;
}

/***********************************************************************
 *      ICOpenFunction          [MSVFW32.@]
 */
HIC VFWAPI ICOpenFunction(DWORD fccType, DWORD fccHandler, UINT wMode, DRIVERPROC lpfnHandler)
{
    ICOPEN      icopen;
    WINE_HIC*   whic;

    TRACE("(%s,%s,%d,%p)\n",
          wine_dbgstr_fcc(fccType), wine_dbgstr_fcc(fccHandler), wMode, lpfnHandler);

    icopen.dwSize      = sizeof(ICOPEN);
    icopen.fccType     = fccType;
    icopen.fccHandler  = fccHandler;
    icopen.dwVersion   = ICVERSION;
    icopen.dwFlags     = wMode;
    icopen.dwError     = 0;
    icopen.pV1Reserved = NULL;
    icopen.pV2Reserved = NULL;
    icopen.dnDevNode   = 0; /* FIXME */

    whic = HeapAlloc(GetProcessHeap(), 0, sizeof(WINE_HIC));
    if (!whic) return 0;

    whic->driverproc   = lpfnHandler;
    while (MSVIDEO_GetHicPtr((HIC)(ULONG_PTR)IC_HandleRef) != NULL) IC_HandleRef++;
    whic->hic          = (HIC)(ULONG_PTR)IC_HandleRef++;
    whic->next         = MSVIDEO_FirstHic;
    MSVIDEO_FirstHic = whic;

    /* Now try opening/loading the driver. Taken from DRIVER_AddToList */
    /* What if the function is used more than once? */

    if (MSVIDEO_SendMessage(whic, DRV_LOAD, 0L, 0L) != DRV_SUCCESS) 
    {
        WARN("DRV_LOAD failed for hic %p\n", whic->hic);
        MSVIDEO_FirstHic = whic->next;
        HeapFree(GetProcessHeap(), 0, whic);
        return 0;
    }
    /* return value is not checked */
    MSVIDEO_SendMessage(whic, DRV_ENABLE, 0L, 0L);

    whic->driverId = (DWORD)MSVIDEO_SendMessage(whic, DRV_OPEN, 0, (DWORD_PTR)&icopen);
    /* FIXME: What should we put here? */
    whic->hdrv = NULL;
    
    if (whic->driverId == 0) 
    {
        WARN("DRV_OPEN failed for hic %p\n", whic->hic);
        MSVIDEO_FirstHic = whic->next;
        HeapFree(GetProcessHeap(), 0, whic);
        return 0;
    }

    TRACE("=> %p\n", whic->hic);
    return whic->hic;
}

/***********************************************************************
 *      ICGetInfo           [MSVFW32.@]
 */
LRESULT VFWAPI ICGetInfo(HIC hic, ICINFO *picinfo, DWORD cb) 
{
    LRESULT ret;
    WINE_HIC*   whic = MSVIDEO_GetHicPtr(hic);

    TRACE("(%p,%p,%d)\n", hic, picinfo, cb);

    if (!whic) return ICERR_BADHANDLE;
    if (!picinfo) return MMSYSERR_INVALPARAM;

    /* (WS) The field szDriver should be initialized because the driver 
     * is not obliged and often will not do it. Some applications, like
     * VirtualDub, rely on this field and will occasionally crash if it
     * goes uninitialized.
     */
    if (cb >= sizeof(ICINFO)) picinfo->szDriver[0] = '\0';

    ret = ICSendMessage(hic, ICM_GETINFO, (DWORD_PTR)picinfo, cb);

    /* (WS) When szDriver was not supplied by the driver itself, apparently 
     * Windows will set its value equal to the driver file name. This can
     * be obtained from the registry as we do here.
     */
    if (cb >= sizeof(ICINFO) && picinfo->szDriver[0] == 0)
    {
        ICINFO  ii;

        memset(&ii, 0, sizeof(ii));
        ii.dwSize = sizeof(ii);
        ICInfo(picinfo->fccType, picinfo->fccHandler, &ii);
        lstrcpyW(picinfo->szDriver, ii.szDriver);
    }

    return ret;
}

typedef struct {
    DWORD fccType;
    DWORD fccHandler;
    LPBITMAPINFOHEADER lpbiIn;
    LPBITMAPINFOHEADER lpbiOut;
    WORD wMode;
    DWORD querymsg;
    HIC hic;
} driver_info_t;

static HIC try_driver(driver_info_t *info)
{
    HIC   hic;

    if ((hic = ICOpen(info->fccType, info->fccHandler, info->wMode))) 
    {
    if (!ICSendMessage(hic, info->querymsg, (DWORD_PTR)info->lpbiIn, (DWORD_PTR)info->lpbiOut))
        return hic;
    ICClose(hic);
    }
    return 0;
}

static BOOL ICLocate_enum_handler(const char *name, const char *driver, unsigned int nr, void *param)
{
    driver_info_t *info = param;
    info->fccHandler = mmioStringToFOURCCA(name + 5, 0);
    info->hic = try_driver(info);
    return info->hic != 0;
}

/***********************************************************************
 *      ICLocate            [MSVFW32.@]
 */
HIC VFWAPI ICLocate(DWORD fccType, DWORD fccHandler, LPBITMAPINFOHEADER lpbiIn,
                    LPBITMAPINFOHEADER lpbiOut, WORD wMode)
{
    driver_info_t info;

    TRACE("(%s,%s,%p,%p,0x%04x)\n", 
          wine_dbgstr_fcc(fccType), wine_dbgstr_fcc(fccHandler), lpbiIn, lpbiOut, wMode);

    info.fccType = fccType;
    info.fccHandler = fccHandler;
    info.lpbiIn = lpbiIn;
    info.lpbiOut = lpbiOut;
    info.wMode = wMode;

    switch (wMode) 
    {
    case ICMODE_FASTCOMPRESS:
    case ICMODE_COMPRESS:
        info.querymsg = ICM_COMPRESS_QUERY;
        break;
    case ICMODE_FASTDECOMPRESS:
    case ICMODE_DECOMPRESS:
        info.querymsg = ICM_DECOMPRESS_QUERY;
        break;
    case ICMODE_DRAW:
        info.querymsg = ICM_DRAW_QUERY;
        break;
    default:
        WARN("Unknown mode (%d)\n", wMode);
        return 0;
    }

    /* Easy case: handler/type match, we just fire a query and return */
    info.hic = try_driver(&info);
    /* If it didn't work, try each driver in turn. 32 bit codecs only. */
    /* FIXME: Move this to an init routine? */
    if (!info.hic) enum_drivers(fccType, ICLocate_enum_handler, &info);

    if (info.hic) 
    {
        TRACE("=> %p\n", info.hic);
    return info.hic;
    }

    if (fccType == streamtypeVIDEO) 
        return ICLocate(ICTYPE_VIDEO, fccHandler, lpbiIn, lpbiOut, wMode);
    
    ERR("Required media codec '%s %s' not found!\n",
         wine_dbgstr_fcc(fccType), wine_dbgstr_fcc(fccHandler));
    return 0;
}

/***********************************************************************
 *      ICGetDisplayFormat          [MSVFW32.@]
 */
HIC VFWAPI ICGetDisplayFormat(HIC hic, BITMAPINFOHEADER *in, BITMAPINFOHEADER *out,
                              int depth, int width, int height)
{
    HIC tmphic = hic;

    TRACE("(%p, %p, %p, %d, %d, %d)\n", hic, in, out, depth, width, height);

    if (!tmphic)
    {
        tmphic = ICLocate(ICTYPE_VIDEO, 0, in, NULL, ICMODE_DECOMPRESS);
        if (!tmphic)
            return NULL;
    }

    if (ICDecompressQuery(tmphic, in, NULL))
        goto err;

    if (width <= 0 || height <= 0)
    {
        width = in->biWidth;
        height = in->biHeight;
    }

    if (!depth)
        depth = 32;

    *out = *in;
    out->biSize = sizeof(*out);
    out->biWidth = width;
    out->biHeight = height;
    out->biCompression = BI_RGB;
    out->biSizeImage = get_size_image(width, height, depth);

    /* first try the given depth */
    out->biBitCount = depth;
    out->biSizeImage = get_size_image(width, height, out->biBitCount);
    if (!ICDecompressQuery(tmphic, in, out))
    {
        if (depth == 8)
            ICDecompressGetPalette(tmphic, in, out);
        return tmphic;
    }

    /* then try 16, both with BI_RGB and BI_BITFIELDS */
    if (depth <= 16)
    {
        out->biBitCount = 16;
        out->biSizeImage = get_size_image(width, height, out->biBitCount);
        if (!ICDecompressQuery(tmphic, in, out))
            return tmphic;

        out->biCompression = BI_BITFIELDS;
        if (!ICDecompressQuery(tmphic, in, out))
            return tmphic;
        out->biCompression = BI_RGB;
    }

    /* then try 24 */
    if (depth <= 24)
    {
        out->biBitCount = 24;
        out->biSizeImage = get_size_image(width, height, out->biBitCount);
        if (!ICDecompressQuery(tmphic, in, out))
            return tmphic;
    }

    /* then try 32 */
    if (depth <= 32)
    {
        out->biBitCount = 32;
        out->biSizeImage = get_size_image(width, height, out->biBitCount);
        if (!ICDecompressQuery(tmphic, in, out))
            return tmphic;
    }

    /* as a last resort, try 32 bpp with the original width and height */
    out->biWidth = in->biWidth;
    out->biHeight = in->biHeight;
    out->biBitCount = 32;
    out->biSizeImage = get_size_image(out->biWidth, out->biHeight, out->biBitCount);
    if (!ICDecompressQuery(tmphic, in, out))
        return tmphic;

    /* finally, ask the compressor for its default output format */
    if (!ICSendMessage(tmphic, ICM_DECOMPRESS_GET_FORMAT, (DWORD_PTR)in, (DWORD_PTR)out))
        return tmphic;

err:
    if (hic != tmphic)
        ICClose(tmphic);

    return NULL;
}

/***********************************************************************
 *      ICCompress          [MSVFW32.@]
 */
DWORD VFWAPIV
ICCompress(
    HIC hic,DWORD dwFlags,LPBITMAPINFOHEADER lpbiOutput,LPVOID lpData,
    LPBITMAPINFOHEADER lpbiInput,LPVOID lpBits,LPDWORD lpckid,
    LPDWORD lpdwFlags,LONG lFrameNum,DWORD dwFrameSize,DWORD dwQuality,
    LPBITMAPINFOHEADER lpbiPrev,LPVOID lpPrev)
{
    ICCOMPRESS  iccmp;

    TRACE("(%p,%d,%p,%p,%p,%p,...)\n",hic,dwFlags,lpbiOutput,lpData,lpbiInput,lpBits);

    iccmp.dwFlags       = dwFlags;

    iccmp.lpbiOutput    = lpbiOutput;
    iccmp.lpOutput      = lpData;
    iccmp.lpbiInput     = lpbiInput;
    iccmp.lpInput       = lpBits;

    iccmp.lpckid        = lpckid;
    iccmp.lpdwFlags     = lpdwFlags;
    iccmp.lFrameNum     = lFrameNum;
    iccmp.dwFrameSize   = dwFrameSize;
    iccmp.dwQuality     = dwQuality;
    iccmp.lpbiPrev      = lpbiPrev;
    iccmp.lpPrev        = lpPrev;
    return ICSendMessage(hic,ICM_COMPRESS,(DWORD_PTR)&iccmp,sizeof(iccmp));
}

/***********************************************************************
 *      ICDecompress            [MSVFW32.@]
 */
DWORD VFWAPIV  ICDecompress(HIC hic,DWORD dwFlags,LPBITMAPINFOHEADER lpbiFormat,
                LPVOID lpData,LPBITMAPINFOHEADER lpbi,LPVOID lpBits)
{
    ICDECOMPRESS    icd;
    DWORD ret;

    TRACE("(%p,%d,%p,%p,%p,%p)\n",hic,dwFlags,lpbiFormat,lpData,lpbi,lpBits);

    icd.dwFlags = dwFlags;
    icd.lpbiInput   = lpbiFormat;
    icd.lpInput = lpData;

    icd.lpbiOutput  = lpbi;
    icd.lpOutput    = lpBits;
    icd.ckid    = 0;
    ret = ICSendMessage(hic,ICM_DECOMPRESS,(DWORD_PTR)&icd,sizeof(ICDECOMPRESS));

    return ret;
}


struct choose_compressor
{
    UINT flags;
    LPCSTR title;
    COMPVARS cv;
};

struct codec_info
{
    HIC hic;
    ICINFO icinfo;
};

static BOOL enum_compressors(HWND list, COMPVARS *pcv, BOOL enum_all)
{
    UINT id, total = 0;
    ICINFO icinfo;

    id = 0;

    while (ICInfo(pcv->fccType, id, &icinfo))
    {
        struct codec_info *ic;
        DWORD idx;
        HIC hic;

        id++;

        hic = ICOpen(icinfo.fccType, icinfo.fccHandler, ICMODE_COMPRESS);

        if (hic)
        {
            /* for unknown reason fccHandler reported by the driver
             * doesn't always work, use the one returned by ICInfo instead.
             */
            DWORD fccHandler = icinfo.fccHandler;

            if (!enum_all && pcv->lpbiIn)
            {
                if (ICCompressQuery(hic, pcv->lpbiIn, NULL) != ICERR_OK)
                {
                    TRACE("fccHandler %s doesn't support input DIB format %d\n",
                          wine_dbgstr_fcc(icinfo.fccHandler), pcv->lpbiIn->bmiHeader.biCompression);
                    ICClose(hic);
                    continue;
                }
            }

            ICGetInfo(hic, &icinfo, sizeof(icinfo));
            icinfo.fccHandler = fccHandler;

            idx = SendMessageW(list, CB_ADDSTRING, 0, (LPARAM)icinfo.szDescription);

            ic = HeapAlloc(GetProcessHeap(), 0, sizeof(struct codec_info));
            ic->icinfo = icinfo;
            ic->hic = hic;
            SendMessageW(list, CB_SETITEMDATA, idx, (LPARAM)ic);
        }
        total++;
    }

    return total != 0;
}

static INT_PTR CALLBACK icm_choose_compressor_dlgproc(HWND hdlg, UINT msg, WPARAM wparam, LPARAM lparam)
{
    switch (msg)
    {
    case WM_INITDIALOG:
    {
        struct codec_info *ic;
        WCHAR buf[128];
        struct choose_compressor *choose_comp = (struct choose_compressor *)lparam;

        SetWindowLongPtrW(hdlg, DWLP_USER, lparam);

        /* FIXME */
        choose_comp->flags &= ~(ICMF_CHOOSE_DATARATE | ICMF_CHOOSE_KEYFRAME);

        if (choose_comp->title)
            SetWindowTextA(hdlg, choose_comp->title);

        if (!(choose_comp->flags & ICMF_CHOOSE_DATARATE))
        {
            ShowWindow(GetDlgItem(hdlg, IDC_DATARATE_CHECKBOX), SW_HIDE);
            ShowWindow(GetDlgItem(hdlg, IDC_DATARATE), SW_HIDE);
            ShowWindow(GetDlgItem(hdlg, IDC_DATARATE_KB), SW_HIDE);
        }

        if (!(choose_comp->flags & ICMF_CHOOSE_KEYFRAME))
        {
            ShowWindow(GetDlgItem(hdlg, IDC_KEYFRAME_CHECKBOX), SW_HIDE);
            ShowWindow(GetDlgItem(hdlg, IDC_KEYFRAME), SW_HIDE);
            ShowWindow(GetDlgItem(hdlg, IDC_KEYFRAME_FRAMES), SW_HIDE);
        }

        /* FIXME */
        EnableWindow(GetDlgItem(hdlg, IDC_QUALITY_SCROLL), FALSE);
        EnableWindow(GetDlgItem(hdlg, IDC_QUALITY_TXT), FALSE);

        /*if (!(choose_comp->flags & ICMF_CHOOSE_PREVIEW))
            ShowWindow(GetDlgItem(hdlg, IDC_PREVIEW), SW_HIDE);*/

        LoadStringW(MSVFW32_hModule, IDS_FULLFRAMES, buf, 128);
        SendDlgItemMessageW(hdlg, IDC_COMP_LIST, CB_ADDSTRING, 0, (LPARAM)buf);

        ic = HeapAlloc(GetProcessHeap(), 0, sizeof(struct codec_info));
        ic->icinfo.fccType = streamtypeVIDEO;
        ic->icinfo.fccHandler = comptypeDIB;
        ic->hic = 0;
        SendDlgItemMessageW(hdlg, IDC_COMP_LIST, CB_SETITEMDATA, 0, (LPARAM)ic);

        enum_compressors(GetDlgItem(hdlg, IDC_COMP_LIST), &choose_comp->cv, choose_comp->flags & ICMF_CHOOSE_ALLCOMPRESSORS);

        SendDlgItemMessageW(hdlg, IDC_COMP_LIST, CB_SETCURSEL, 0, 0);
        SetFocus(GetDlgItem(hdlg, IDC_COMP_LIST));

        SetWindowLongPtrW(hdlg, DWLP_USER, (ULONG_PTR)choose_comp);
        break;
    }

    case WM_COMMAND:
        switch (LOWORD(wparam))
        {
        case IDC_COMP_LIST:
        {
            INT cur_sel;
            struct codec_info *ic;
            BOOL can_configure = FALSE, can_about = FALSE;
            struct choose_compressor *choose_comp;

            if (HIWORD(wparam) != CBN_SELCHANGE && HIWORD(wparam) != CBN_SETFOCUS)
                break;

            choose_comp = (struct choose_compressor *)GetWindowLongPtrW(hdlg, DWLP_USER);

            cur_sel = SendMessageW((HWND)lparam, CB_GETCURSEL, 0, 0);

            ic = (struct codec_info *)SendMessageW((HWND)lparam, CB_GETITEMDATA, cur_sel, 0);
            if (ic && ic->hic)
            {
                if (ICQueryConfigure(ic->hic) == DRVCNF_OK)
                    can_configure = TRUE;
                if (ICQueryAbout(ic->hic) == DRVCNF_OK)
                    can_about = TRUE;
            }
            EnableWindow(GetDlgItem(hdlg, IDC_CONFIGURE), can_configure);
            EnableWindow(GetDlgItem(hdlg, IDC_ABOUT), can_about);

            if (choose_comp->flags & ICMF_CHOOSE_DATARATE)
            {
                /* FIXME */
            }
            if (choose_comp->flags & ICMF_CHOOSE_KEYFRAME)
            {
                /* FIXME */
            }

            break;
        }

        case IDC_CONFIGURE:
        case IDC_ABOUT:
        {
            HWND list = GetDlgItem(hdlg, IDC_COMP_LIST);
            INT cur_sel;
            struct codec_info *ic;

            if (HIWORD(wparam) != BN_CLICKED)
                break;

            cur_sel = SendMessageW(list, CB_GETCURSEL, 0, 0);

            ic = (struct codec_info *)SendMessageW(list, CB_GETITEMDATA, cur_sel, 0);
            if (ic && ic->hic)
            {
                if (LOWORD(wparam) == IDC_CONFIGURE)
                    ICConfigure(ic->hic, hdlg);
                else
                    ICAbout(ic->hic, hdlg);
            }

            break;
        }

        case IDOK:
        {
            HWND list = GetDlgItem(hdlg, IDC_COMP_LIST);
            INT cur_sel;
            struct codec_info *ic;

            if (HIWORD(wparam) != BN_CLICKED)
                break;

            cur_sel = SendMessageW(list, CB_GETCURSEL, 0, 0);
            ic = (struct codec_info *)SendMessageW(list, CB_GETITEMDATA, cur_sel, 0);
            if (ic)
            {
                struct choose_compressor *choose_comp = (struct choose_compressor *)GetWindowLongPtrW(hdlg, DWLP_USER);

                choose_comp->cv.hic = ic->hic;
                choose_comp->cv.fccType = ic->icinfo.fccType;
                choose_comp->cv.fccHandler = ic->icinfo.fccHandler;
                /* FIXME: fill everything else */

                /* prevent closing the codec handle below */
                ic->hic = 0;
            }
        }
        /* fall through */
        case IDCANCEL:
        {
            HWND list = GetDlgItem(hdlg, IDC_COMP_LIST);
            INT idx = 0;

            if (HIWORD(wparam) != BN_CLICKED)
                break;

            while (1)
            {
                struct codec_info *ic;
    
                ic = (struct codec_info *)SendMessageW(list, CB_GETITEMDATA, idx++, 0);

                if (!ic || (LONG_PTR)ic == CB_ERR) break;

                if (ic->hic) ICClose(ic->hic);
                HeapFree(GetProcessHeap(), 0, ic);
            }

            EndDialog(hdlg, LOWORD(wparam) == IDOK);
            break;
        }

        default:
            break;
        }
        break;

    default:
        break;
    }

    return FALSE;
}

/***********************************************************************
 *      ICCompressorChoose   [MSVFW32.@]
 */
BOOL VFWAPI ICCompressorChoose(HWND hwnd, UINT uiFlags, LPVOID pvIn,
                               LPVOID lpData, PCOMPVARS pc, LPSTR lpszTitle)
{
    struct choose_compressor choose_comp;
    BOOL ret;

    TRACE("(%p,%08x,%p,%p,%p,%s)\n", hwnd, uiFlags, pvIn, lpData, pc, lpszTitle);

    if (!pc || pc->cbSize != sizeof(COMPVARS))
        return FALSE;

    if (!(pc->dwFlags & ICMF_COMPVARS_VALID))
    {
        pc->dwFlags   = 0;
        pc->fccType   = pc->fccHandler = 0;
        pc->hic       = NULL;
        pc->lpbiIn    = NULL;
        pc->lpbiOut   = NULL;
        pc->lpBitsOut = pc->lpBitsPrev = pc->lpState = NULL;
        pc->lQ        = ICQUALITY_DEFAULT;
        pc->lKey      = -1;
        pc->lDataRate = 300; /* kB */
        pc->lpState   = NULL;
        pc->cbState   = 0;
    }
    if (pc->fccType == 0)
        pc->fccType = ICTYPE_VIDEO;

    choose_comp.cv = *pc;
    choose_comp.flags = uiFlags;
    choose_comp.title = lpszTitle;

    ret = DialogBoxParamW(MSVFW32_hModule, MAKEINTRESOURCEW(ICM_CHOOSE_COMPRESSOR), hwnd,
                          icm_choose_compressor_dlgproc, (LPARAM)&choose_comp);

    if (ret)
    {
        *pc = choose_comp.cv;
        pc->dwFlags |= ICMF_COMPVARS_VALID;
    }

    return ret;
}


/***********************************************************************
 *      ICCompressorFree   [MSVFW32.@]
 */
void VFWAPI ICCompressorFree(PCOMPVARS pc)
{
  TRACE("(%p)\n",pc);

  if (pc != NULL && pc->cbSize == sizeof(COMPVARS)) {
    if (pc->hic != NULL) {
      ICClose(pc->hic);
      pc->hic = NULL;
    }
    HeapFree(GetProcessHeap(), 0, pc->lpbiIn);
    pc->lpbiIn = NULL;
    HeapFree(GetProcessHeap(), 0, pc->lpBitsOut);
    pc->lpBitsOut = NULL;
    HeapFree(GetProcessHeap(), 0, pc->lpBitsPrev);
    pc->lpBitsPrev = NULL;
    HeapFree(GetProcessHeap(), 0, pc->lpState);
    pc->lpState = NULL;
    pc->dwFlags = 0;
  }
}

/***********************************************************************
 *      ICSendMessage           [MSVFW32.@]
 */
LRESULT VFWAPI ICSendMessage(HIC hic, UINT msg, DWORD_PTR lParam1, DWORD_PTR lParam2) 
{
    WINE_HIC*   whic = MSVIDEO_GetHicPtr(hic);

    if (!whic) return ICERR_BADHANDLE;
    return MSVIDEO_SendMessage(whic, msg, lParam1, lParam2);
}

/***********************************************************************
 *      ICDrawBegin     [MSVFW32.@]
 */
DWORD VFWAPIV ICDrawBegin(
    HIC                hic,     /* [in] */
    DWORD              dwFlags, /* [in] flags */
    HPALETTE           hpal,    /* [in] palette to draw with */
    HWND               hwnd,    /* [in] window to draw to */
    HDC                hdc,     /* [in] HDC to draw to */
    INT                xDst,    /* [in] destination rectangle */
    INT                yDst,    /* [in] */
    INT                dxDst,   /* [in] */
    INT                dyDst,   /* [in] */
    LPBITMAPINFOHEADER lpbi,    /* [in] format of frame to draw */
    INT                xSrc,    /* [in] source rectangle */
    INT                ySrc,    /* [in] */
    INT                dxSrc,   /* [in] */
    INT                dySrc,   /* [in] */
    DWORD              dwRate,  /* [in] frames/second = (dwRate/dwScale) */
    DWORD              dwScale) /* [in] */
{

    ICDRAWBEGIN icdb;

    TRACE("(%p,%d,%p,%p,%p,%u,%u,%u,%u,%p,%u,%u,%u,%u,%d,%d)\n",
          hic, dwFlags, hpal, hwnd, hdc, xDst, yDst, dxDst, dyDst,
          lpbi, xSrc, ySrc, dxSrc, dySrc, dwRate, dwScale);

    icdb.dwFlags = dwFlags;
    icdb.hpal = hpal;
    icdb.hwnd = hwnd;
    icdb.hdc = hdc;
    icdb.xDst = xDst;
    icdb.yDst = yDst;
    icdb.dxDst = dxDst;
    icdb.dyDst = dyDst;
    icdb.lpbi = lpbi;
    icdb.xSrc = xSrc;
    icdb.ySrc = ySrc;
    icdb.dxSrc = dxSrc;
    icdb.dySrc = dySrc;
    icdb.dwRate = dwRate;
    icdb.dwScale = dwScale;
    return ICSendMessage(hic,ICM_DRAW_BEGIN,(DWORD_PTR)&icdb,sizeof(icdb));
}

/***********************************************************************
 *      ICDraw          [MSVFW32.@]
 */
DWORD VFWAPIV ICDraw(HIC hic, DWORD dwFlags, LPVOID lpFormat, LPVOID lpData, DWORD cbData, LONG lTime) {
    ICDRAW  icd;

    TRACE("(%p,%d,%p,%p,%d,%d)\n",hic,dwFlags,lpFormat,lpData,cbData,lTime);

    icd.dwFlags = dwFlags;
    icd.lpFormat = lpFormat;
    icd.lpData = lpData;
    icd.cbData = cbData;
    icd.lTime = lTime;

    return ICSendMessage(hic,ICM_DRAW,(DWORD_PTR)&icd,sizeof(icd));
}

/***********************************************************************
 *      ICClose         [MSVFW32.@]
 */
LRESULT WINAPI ICClose(HIC hic)
{
    WINE_HIC* whic = MSVIDEO_GetHicPtr(hic);
    WINE_HIC** p;

    TRACE("(%p)\n",hic);

    if (!whic) return ICERR_BADHANDLE;

    if (whic->driverproc) 
    {
        MSVIDEO_SendMessage(whic, DRV_CLOSE, 0, 0);
        MSVIDEO_SendMessage(whic, DRV_DISABLE, 0, 0);
        MSVIDEO_SendMessage(whic, DRV_FREE, 0, 0);
    }
    else
    {
        CloseDriver(whic->hdrv, 0, 0);
    }

    /* remove whic from list */
    for (p = &MSVIDEO_FirstHic; *p != NULL; p = &((*p)->next))
    {
        if ((*p) == whic)
        {
            *p = whic->next;
            break;
        }
    }

    HeapFree(GetProcessHeap(), 0, whic);
    return 0;
}



/***********************************************************************
 *      ICImageCompress [MSVFW32.@]
 */
HANDLE VFWAPI ICImageCompress(
    HIC hic, UINT uiFlags,
    LPBITMAPINFO lpbiIn, LPVOID lpBits,
    LPBITMAPINFO lpbiOut, LONG lQuality,
    LONG* plSize)
{
    FIXME("(%p,%08x,%p,%p,%p,%d,%p)\n",
        hic, uiFlags, lpbiIn, lpBits, lpbiOut, lQuality, plSize);

    return NULL;
}

/***********************************************************************
 *      ICImageDecompress   [MSVFW32.@]
 */

HANDLE VFWAPI ICImageDecompress(
    HIC hic, UINT uiFlags, LPBITMAPINFO lpbiIn,
    LPVOID lpBits, LPBITMAPINFO lpbiOut)
{
    HGLOBAL hMem = NULL;
    BYTE*   pMem = NULL;
    BOOL    bReleaseIC = FALSE;
    BYTE*   pHdr = NULL;
    ULONG   cbHdr = 0;
    BOOL    bSucceeded = FALSE;
    BOOL    bInDecompress = FALSE;
    DWORD   biSizeImage;

    TRACE("(%p,%08x,%p,%p,%p)\n",
        hic, uiFlags, lpbiIn, lpBits, lpbiOut);

    if ( hic == NULL )
    {
        hic = ICDecompressOpen( ICTYPE_VIDEO, 0, &lpbiIn->bmiHeader, (lpbiOut != NULL) ? &lpbiOut->bmiHeader : NULL );
        if ( hic == NULL )
        {
            WARN("no handler\n" );
            goto err;
        }
        bReleaseIC = TRUE;
    }
    if ( uiFlags != 0 )
    {
        FIXME( "unknown flag %08x\n", uiFlags );
        goto err;
    }
    if ( lpbiIn == NULL || lpBits == NULL )
    {
        WARN("invalid argument\n");
        goto err;
    }

    if ( lpbiOut != NULL )
    {
        if ( lpbiOut->bmiHeader.biSize != sizeof(BITMAPINFOHEADER) )
            goto err;
        cbHdr = sizeof(BITMAPINFOHEADER);
        if ( lpbiOut->bmiHeader.biCompression == 3 )
            cbHdr += sizeof(DWORD)*3;
        else
        if ( lpbiOut->bmiHeader.biBitCount <= 8 )
        {
            if ( lpbiOut->bmiHeader.biClrUsed == 0 )
                cbHdr += sizeof(RGBQUAD) * (1<<lpbiOut->bmiHeader.biBitCount);
            else
                cbHdr += sizeof(RGBQUAD) * lpbiOut->bmiHeader.biClrUsed;
        }
    }
    else
    {
        TRACE( "get format\n" );

        cbHdr = ICDecompressGetFormatSize(hic,lpbiIn);
        if ( cbHdr < sizeof(BITMAPINFOHEADER) )
            goto err;
        pHdr = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,cbHdr+sizeof(RGBQUAD)*256);
        if ( pHdr == NULL )
            goto err;
        if ( ICDecompressGetFormat( hic, lpbiIn, pHdr ) != ICERR_OK )
            goto err;
        lpbiOut = (BITMAPINFO*)pHdr;
        if ( lpbiOut->bmiHeader.biBitCount <= 8 &&
             ICDecompressGetPalette( hic, lpbiIn, lpbiOut ) != ICERR_OK &&
             lpbiIn->bmiHeader.biBitCount == lpbiOut->bmiHeader.biBitCount )
        {
            if ( lpbiIn->bmiHeader.biClrUsed == 0 )
                memcpy( lpbiOut->bmiColors, lpbiIn->bmiColors, sizeof(RGBQUAD)*(1<<lpbiOut->bmiHeader.biBitCount) );
            else
                memcpy( lpbiOut->bmiColors, lpbiIn->bmiColors, sizeof(RGBQUAD)*lpbiIn->bmiHeader.biClrUsed );
        }
        if ( lpbiOut->bmiHeader.biBitCount <= 8 &&
             lpbiOut->bmiHeader.biClrUsed == 0 )
            lpbiOut->bmiHeader.biClrUsed = 1<<lpbiOut->bmiHeader.biBitCount;

        lpbiOut->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
        cbHdr = sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD)*lpbiOut->bmiHeader.biClrUsed;
    }

    biSizeImage = lpbiOut->bmiHeader.biSizeImage;
    if ( biSizeImage == 0 )
        biSizeImage = get_size_image(lpbiOut->bmiHeader.biWidth, lpbiOut->bmiHeader.biHeight, lpbiOut->bmiHeader.biBitCount);

    TRACE( "call ICDecompressBegin\n" );

    if ( ICDecompressBegin( hic, lpbiIn, lpbiOut ) != ICERR_OK )
        goto err;
    bInDecompress = TRUE;

    TRACE( "cbHdr %d, biSizeImage %d\n", cbHdr, biSizeImage );

    hMem = GlobalAlloc( GMEM_MOVEABLE|GMEM_ZEROINIT, cbHdr + biSizeImage );
    if ( hMem == NULL )
    {
        WARN( "out of memory\n" );
        goto err;
    }
    pMem = GlobalLock( hMem );
    if ( pMem == NULL )
        goto err;
    memcpy( pMem, lpbiOut, cbHdr );

    TRACE( "call ICDecompress\n" );
    if ( ICDecompress( hic, 0, &lpbiIn->bmiHeader, lpBits, &lpbiOut->bmiHeader, pMem+cbHdr ) != ICERR_OK )
        goto err;

    bSucceeded = TRUE;
err:
    if ( bInDecompress )
        ICDecompressEnd( hic );
    if ( bReleaseIC )
        ICClose(hic);
        HeapFree(GetProcessHeap(),0,pHdr);
    if ( pMem != NULL )
        GlobalUnlock( hMem );
    if ( !bSucceeded && hMem != NULL )
    {
        GlobalFree(hMem); hMem = NULL;
    }

    return hMem;
}

/***********************************************************************
 *      ICSeqCompressFrame   [MSVFW32.@]
 */
LPVOID VFWAPI ICSeqCompressFrame(PCOMPVARS pc, UINT uiFlags, LPVOID lpBits, BOOL *pfKey, LONG *plSize)
{
    ICCOMPRESS* icComp = pc->lpState;
    DWORD ret;
    TRACE("(%p, 0x%08x, %p, %p, %p)\n", pc, uiFlags, lpBits, pfKey, plSize);

    if (pc->cbState != sizeof(ICCOMPRESS))
    {
       ERR("Invalid cbState %i\n", pc->cbState);
       return NULL;
    }

    if (!pc->lKeyCount++)
       icComp->dwFlags = ICCOMPRESS_KEYFRAME;
    else
    {
        if (pc->lKey && pc->lKeyCount == (pc->lKey - 1))
        /* No key frames if pc->lKey == 0 */
           pc->lKeyCount = 0;
        icComp->dwFlags = 0;
    }

    icComp->lpInput = lpBits;
    icComp->lFrameNum = pc->lFrame++;
    icComp->lpOutput = pc->lpBitsOut;
    icComp->lpPrev = pc->lpBitsPrev;
    ret = ICSendMessage(pc->hic, ICM_COMPRESS, (DWORD_PTR)icComp, sizeof(*icComp));

    if (ret == ICERR_OK)
    {
        LPVOID oldprev, oldout;

        if (icComp->dwFlags & AVIIF_KEYFRAME)
        {
            pc->lKeyCount = 1;
            *pfKey = TRUE;
            TRACE("Key frame\n");
        }
        else
            *pfKey = FALSE;

        *plSize = icComp->lpbiOutput->biSizeImage;

        /* We shift Prev and Out, so we don't have to allocate and release memory */
        oldprev = pc->lpBitsPrev;
        oldout = pc->lpBitsOut;
        pc->lpBitsPrev = oldout;
        pc->lpBitsOut = oldprev;

        TRACE("returning: %p, compressed frame size %u\n", icComp->lpOutput, *plSize);
        return icComp->lpOutput;
    }
    return NULL;
}

static void clear_compvars(PCOMPVARS pc)
{
    HeapFree(GetProcessHeap(), 0, pc->lpbiIn);
    HeapFree(GetProcessHeap(), 0, pc->lpBitsPrev);
    HeapFree(GetProcessHeap(), 0, pc->lpBitsOut);
    HeapFree(GetProcessHeap(), 0, pc->lpState);
    pc->lpbiIn = pc->lpBitsPrev = pc->lpBitsOut = pc->lpState = NULL;
    if (pc->dwFlags & 0x80000000)
    {
        HeapFree(GetProcessHeap(), 0, pc->lpbiOut);
        pc->lpbiOut = NULL;
        pc->dwFlags &= ~0x80000000;
    }
}

/***********************************************************************
 *      ICSeqCompressFrameEnd   [MSVFW32.@]
 */
void VFWAPI ICSeqCompressFrameEnd(PCOMPVARS pc)
{
    TRACE("(%p)\n", pc);
    ICSendMessage(pc->hic, ICM_COMPRESS_END, 0, 0);
    clear_compvars(pc);
}

/***********************************************************************
 *      ICSeqCompressFrameStart [MSVFW32.@]
 */
BOOL VFWAPI ICSeqCompressFrameStart(PCOMPVARS pc, LPBITMAPINFO lpbiIn)
{
    /* I'm ignoring bmiColors as I don't know what to do with it,
     * it doesn't appear to be used though
     */
    DWORD ret;
    ICCOMPRESS* icComp;
    pc->lpbiIn = HeapAlloc(GetProcessHeap(), 0, sizeof(BITMAPINFO));
    if (!pc->lpbiIn)
        return FALSE;

    *pc->lpbiIn = *lpbiIn;

    pc->lpState = HeapAlloc(GetProcessHeap(), 0, sizeof(ICCOMPRESS)
                            + sizeof(*icComp->lpckid) + sizeof(*icComp->lpdwFlags));
    if (!pc->lpState)
        goto error;

    pc->cbState = sizeof(ICCOMPRESS);

    if (!pc->lpbiOut)
    {
        /* Ask compressor for needed header size */
        int size = ICSendMessage(pc->hic, ICM_COMPRESS_GET_FORMAT,
                                 (DWORD_PTR)pc->lpbiIn, 0);
        if (size <= 0)
            goto error;

        pc->lpbiOut = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size);
        if (!pc->lpbiOut)
            goto error;
        /* Flag to show that we allocated lpbiOut for proper cleanup */
        pc->dwFlags |= 0x80000000;

        ret = ICSendMessage(pc->hic, ICM_COMPRESS_GET_FORMAT,
                            (DWORD_PTR)pc->lpbiIn, (DWORD_PTR)pc->lpbiOut);
        if (ret != ICERR_OK)
        {
            ERR("Could not get output format from compressor\n");
            goto error;
        }
        if (!pc->lpbiOut->bmiHeader.biSizeImage)
        {
            /* If we can't know the output frame size for sure at least allocate
             * the same size of the input frame and also at least 8Kb to be sure
             * that poor compressors will have enough memory to work if the input
             * frame is too small.
             */
            pc->lpbiOut->bmiHeader.biSizeImage = max(8192, pc->lpbiIn->bmiHeader.biSizeImage);
            ERR("Bad codec! Invalid output frame size, guessing from input\n");
        }
    }

    TRACE("Input: %ux%u, fcc %s, bpp %u, size %u\n",
          pc->lpbiIn->bmiHeader.biWidth, pc->lpbiIn->bmiHeader.biHeight,
          wine_dbgstr_fcc(pc->lpbiIn->bmiHeader.biCompression),
          pc->lpbiIn->bmiHeader.biBitCount,
          pc->lpbiIn->bmiHeader.biSizeImage);
    TRACE("Output: %ux%u, fcc %s, bpp %u, size %u\n",
          pc->lpbiOut->bmiHeader.biWidth, pc->lpbiOut->bmiHeader.biHeight,
          wine_dbgstr_fcc(pc->lpbiOut->bmiHeader.biCompression),
          pc->lpbiOut->bmiHeader.biBitCount,
          pc->lpbiOut->bmiHeader.biSizeImage);

    /* Buffer for compressed frame data */
    pc->lpBitsOut = HeapAlloc(GetProcessHeap(), 0, pc->lpbiOut->bmiHeader.biSizeImage);
    if (!pc->lpBitsOut)
        goto error;

    /* Buffer for previous compressed frame data */
    pc->lpBitsPrev = HeapAlloc(GetProcessHeap(), 0, pc->lpbiOut->bmiHeader.biSizeImage);
    if (!pc->lpBitsPrev)
        goto error;

    TRACE("Compvars:\n"
          "\tsize: %i\n"
          "\tflags: 0x%x\n"
          "\thic: %p\n"
          "\ttype: %s\n"
          "\thandler: %s\n"
          "\tin/out: %p/%p\n"
          "\tkey/data/quality: %i/%i/%i\n",
    pc->cbSize, pc->dwFlags, pc->hic, wine_dbgstr_fcc(pc->fccType),
    wine_dbgstr_fcc(pc->fccHandler), pc->lpbiIn, pc->lpbiOut, pc->lKey,
    pc->lDataRate, pc->lQ);

    ret = ICSendMessage(pc->hic, ICM_COMPRESS_BEGIN, (DWORD_PTR)pc->lpbiIn, (DWORD_PTR)pc->lpbiOut);
    if (ret == ICERR_OK)
    {
        icComp = pc->lpState;
        /* Initialise some variables */
        pc->lFrame = 0; pc->lKeyCount = 0;

        icComp->lpbiOutput = &pc->lpbiOut->bmiHeader;
        icComp->lpbiInput = &pc->lpbiIn->bmiHeader;
        icComp->lpckid = (DWORD *)(icComp + 1);
        *icComp->lpckid = 0;
        icComp->lpdwFlags = (DWORD *)((char *)(icComp + 1) + sizeof(*icComp->lpckid));
        *icComp->lpdwFlags = 0;
        icComp->dwFrameSize = 0;
        icComp->dwQuality = pc->lQ;
        icComp->lpbiPrev = &pc->lpbiIn->bmiHeader;
        return TRUE;
    }
error:
    clear_compvars(pc);
    return FALSE;
}

/***********************************************************************
 *      GetFileNamePreview   [MSVFW32.@]
 */
static BOOL GetFileNamePreview(LPVOID lpofn,BOOL bSave,BOOL bUnicode)
{
  CHAR    szFunctionName[20];
  BOOL    (*fnGetFileName)(LPVOID);
  HMODULE hComdlg32;
  BOOL    ret;

  FIXME("(%p,%d,%d), semi-stub!\n",lpofn,bSave,bUnicode);

  lstrcpyA(szFunctionName, (bSave ? "GetSaveFileName" : "GetOpenFileName"));
  lstrcatA(szFunctionName, (bUnicode ? "W" : "A"));

  hComdlg32 = LoadLibraryA("COMDLG32.DLL");
  if (hComdlg32 == NULL)
    return FALSE;

  fnGetFileName = (LPVOID)GetProcAddress(hComdlg32, szFunctionName);
  if (fnGetFileName == NULL)
  {
    FreeLibrary(hComdlg32);
    return FALSE;
  }

  /* FIXME: need to add OFN_ENABLEHOOK and our own handler */
  ret = fnGetFileName(lpofn);

  FreeLibrary(hComdlg32);
  return ret;
}

/***********************************************************************
 *      GetOpenFileNamePreviewA [MSVFW32.@]
 */
BOOL WINAPI GetOpenFileNamePreviewA(LPOPENFILENAMEA lpofn)
{
  FIXME("(%p), semi-stub!\n", lpofn);

  return GetFileNamePreview(lpofn, FALSE, FALSE);
}

/***********************************************************************
 *      GetOpenFileNamePreviewW [MSVFW32.@]
 */
BOOL WINAPI GetOpenFileNamePreviewW(LPOPENFILENAMEW lpofn)
{
  FIXME("(%p), semi-stub!\n", lpofn);

  return GetFileNamePreview(lpofn, FALSE, TRUE);
}

/***********************************************************************
 *      GetSaveFileNamePreviewA [MSVFW32.@]
 */
BOOL WINAPI GetSaveFileNamePreviewA(LPOPENFILENAMEA lpofn)
{
  FIXME("(%p), semi-stub!\n", lpofn);

  return GetFileNamePreview(lpofn, TRUE, FALSE);
}

/***********************************************************************
 *      GetSaveFileNamePreviewW [MSVFW32.@]
 */
BOOL WINAPI GetSaveFileNamePreviewW(LPOPENFILENAMEW lpofn)
{
  FIXME("(%p), semi-stub!\n", lpofn);

  return GetFileNamePreview(lpofn, TRUE, TRUE);
}