Null video codec driver

nullvidc.patch

diff --git a/configure.ac b/configure.ac
index 7096e2fb66..90adbb9f92 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3549,6 +3549,7 @@ WINE_CONFIG_MAKEFILE(dlls/ntoskrnl.exe)
 WINE_CONFIG_MAKEFILE(dlls/ntoskrnl.exe/tests)
 WINE_CONFIG_MAKEFILE(dlls/ntprint)
 WINE_CONFIG_MAKEFILE(dlls/ntprint/tests)
+WINE_CONFIG_MAKEFILE(dlls/nullvidc)
 WINE_CONFIG_MAKEFILE(dlls/objsel)
 WINE_CONFIG_MAKEFILE(dlls/odbc32)
 WINE_CONFIG_MAKEFILE(dlls/odbcbcp)
diff --git a/dlls/nullvidc/Makefile.in b/dlls/nullvidc/Makefile.in
new file mode 100644
index 0000000000..1dbe7333b5
--- /dev/null
+++ b/dlls/nullvidc/Makefile.in
@@ -0,0 +1,9 @@
+MODULE    = nullvidc.dll
+IMPORTS   = user32
+
+EXTRADLLFLAGS = -mno-cygwin
+
+C_SRCS = \
+	nullvidc.c
+
+RC_SRCS = nullvidc.rc
diff --git a/dlls/nullvidc/nullvidc.c b/dlls/nullvidc/nullvidc.c
new file mode 100644
index 0000000000..f795bf5149
--- /dev/null
+++ b/dlls/nullvidc/nullvidc.c
@@ -0,0 +1,305 @@
+#include <stdarg.h>
+#include "windef.h"
+#include "winbase.h"
+#include "wingdi.h"
+#include "winuser.h"
+#include "commdlg.h"
+#include "vfw.h"
+#include "mmsystem.h"
+#include "nullvidc_private.h"
+
+#include "wine/debug.h"
+
+WINE_DEFAULT_DEBUG_CHANNEL(nullvidc);
+
+static HINSTANCE NULL_hModule;
+
+#define NULL_MAGIC mmioFOURCC('n', 'u', 'l', 'l')
+#define compare_fourcc(fcc1, fcc2) (((fcc1)^(fcc2))&~0x20202020)
+
+typedef struct _NULL_Info {
+    DWORD dwMagic;
+    int depth;
+} NULL_Info;
+
+typedef BYTE uint8_t;
+
+
+static inline int get_stride(int width, int depth)
+{
+    return ((depth * width + 31) >> 3) & ~3;
+}
+
+
+static LRESULT NULL_DecompressQuery( NULL_Info *info, LPBITMAPINFO in, LPBITMAPINFO out )
+{
+    TRACE("ICM_DECOMPRESS_QUERY %p %p %p\n", info, in, out);
+
+    if( (info==NULL) || (info->dwMagic!=NULL_MAGIC) )
+        return ICERR_BADPARAM;
+
+    return ICERR_OK;
+}
+
+
+static LRESULT NULL_DecompressGetFormat( NULL_Info *info, LPBITMAPINFO in, LPBITMAPINFO out )
+{
+    DWORD size;
+
+    TRACE("ICM_DECOMPRESS_GETFORMAT %p %p %p\n", info, in, out);
+
+    if( (info==NULL) || (info->dwMagic!=NULL_MAGIC) )
+        return ICERR_BADPARAM;
+
+    size = in->bmiHeader.biSize;
+    if (in->bmiHeader.biBitCount <= 8)
+        size += in->bmiHeader.biClrUsed * sizeof(RGBQUAD);
+
+    if( out )
+    {
+        memcpy( out, in, size );
+        out->bmiHeader.biBitCount = 24;
+        out->bmiHeader.biCompression = BI_RGB;
+        out->bmiHeader.biSizeImage = get_stride(in->bmiHeader.biWidth, 24) * in->bmiHeader.biHeight;
+        return ICERR_OK;
+    }
+    return size;
+}
+
+
+static LRESULT NULL_DecompressBegin( NULL_Info *info, LPBITMAPINFO in, LPBITMAPINFO out )
+{
+    TRACE("ICM_DECOMPRESS_BEGIN %p %p %p\n", info, in, out);
+
+    if( (info==NULL) || (info->dwMagic!=NULL_MAGIC) )
+        return ICERR_BADPARAM;
+
+    TRACE("bitmap is %d bpp\n", in->bmiHeader.biBitCount);
+    if( in->bmiHeader.biBitCount == 8 )
+        info->depth = 8;
+    else if( in->bmiHeader.biBitCount == 16 )
+        info->depth = 16;
+    else if( in->bmiHeader.biBitCount == 24 )
+        info->depth = 24;
+    else if( in->bmiHeader.biBitCount == 32 )
+        info->depth = 32;
+    else
+    {
+        info->depth = 0;
+        FIXME("Unsupported output format %i\n", in->bmiHeader.biBitCount);
+    }
+
+    return ICERR_OK;
+}
+
+
+static void draw(void* output, int depth, LONG width, LONG height, LONG sz)
+{
+    LONG write_size;
+    BYTE *pixel_ptr, *pixel_end;
+
+    write_size = width * height * (depth / 8);
+    if (write_size > sz)
+        write_size = sz;
+
+    pixel_end = output + write_size;
+
+    for (pixel_ptr = output; pixel_ptr != pixel_end; pixel_ptr++) {
+        *pixel_ptr = 0;
+    }
+}
+
+
+static LRESULT NULL_Decompress( NULL_Info *info, ICDECOMPRESS *icd, DWORD size )
+{
+    LONG width, height, stride, sz, write_size;
+    void *output, *pixel_ptr, *pixel_end;
+
+    TRACE("ICM_DECOMPRESS %p %p %d\n", info, icd, size);
+
+    if( (info==NULL) || (info->dwMagic!=NULL_MAGIC) )
+        return ICERR_BADPARAM;
+
+    /* FIXME: flags are ignored */
+
+    width  = icd->lpbiInput->biWidth;
+    height = icd->lpbiInput->biHeight;
+    sz = icd->lpbiInput->biSizeImage;
+
+    output = icd->lpOutput;
+
+    draw(output, info->depth, width, height, sz);
+
+    return ICERR_OK;
+}
+
+
+static LRESULT NULL_DecompressEx( NULL_Info *info, ICDECOMPRESSEX *icd, DWORD size )
+{
+    LONG width, height, stride, sz;
+    void *output;
+
+    TRACE("ICM_DECOMPRESSEX %p %p %d\n", info, icd, size);
+
+    if( (info==NULL) || (info->dwMagic!=NULL_MAGIC) )
+        return ICERR_BADPARAM;
+
+    /* FIXME: flags are ignored */
+
+    width  = icd->lpbiSrc->biWidth;
+    height = icd->lpbiSrc->biHeight;
+    sz = icd->lpbiSrc->biSizeImage;
+
+    output = icd->lpDst;
+
+    draw(output, info->depth, width, height, sz);
+    return ICERR_OK;
+}
+
+
+static LRESULT NULL_GetInfo( NULL_Info *info, ICINFO *icinfo, DWORD dwSize )
+{
+    if (!icinfo) return sizeof(ICINFO);
+    if (dwSize < sizeof(ICINFO)) return 0;
+
+    icinfo->dwSize = sizeof(ICINFO);
+    icinfo->fccType = ICTYPE_VIDEO;
+    icinfo->fccHandler = info ? info->dwMagic : NULL_MAGIC;
+    icinfo->dwFlags = 0;
+    icinfo->dwVersion = ICVERSION;
+    icinfo->dwVersionICM = ICVERSION;
+
+    LoadStringW(NULL_hModule, IDS_NAME, icinfo->szName, ARRAY_SIZE(icinfo->szName));
+    LoadStringW(NULL_hModule, IDS_DESCRIPTION, icinfo->szDescription, ARRAY_SIZE(icinfo->szDescription));
+    /* msvfw32 will fill icinfo->szDriver for us */
+
+    return sizeof(ICINFO);
+}
+
+
+/***********************************************************************
+ *		DriverProc
+ */
+LRESULT WINAPI NULL_DriverProc( DWORD_PTR dwDriverId, HDRVR hdrvr, UINT msg,
+                                LPARAM lParam1, LPARAM lParam2 )
+{
+    NULL_Info *info = (NULL_Info *) dwDriverId;
+    LRESULT r = ICERR_UNSUPPORTED;
+
+    TRACE("%ld %p %04x %08lx %08lx\n", dwDriverId, hdrvr, msg, lParam1, lParam2);
+
+    switch( msg )
+    {
+    case DRV_LOAD:
+        TRACE("Loaded\n");
+        r = 1;
+        break;
+
+    case DRV_ENABLE:
+        break;
+
+    case DRV_OPEN:
+    {
+        ICINFO *icinfo = (ICINFO *)lParam2;
+
+        TRACE("Opened\n");
+
+        if (icinfo && compare_fourcc(icinfo->fccType, ICTYPE_VIDEO)) return 0;
+
+        info = HeapAlloc( GetProcessHeap(), 0, sizeof (NULL_Info) );
+        if( info )
+        {
+            memset( info, 0, sizeof *info );
+            info->dwMagic = NULL_MAGIC;
+        }
+        r = (LRESULT) info;
+        break;
+    }
+
+    case DRV_CLOSE:
+        TRACE("Closed\n");
+        HeapFree( GetProcessHeap(), 0, info );
+        break;
+
+    case DRV_DISABLE:
+        break;
+
+    case DRV_FREE:
+        break;
+
+    case ICM_GETINFO:
+        r = NULL_GetInfo( info, (ICINFO *)lParam1, (DWORD)lParam2 );
+        break;
+
+    case ICM_DECOMPRESS_QUERY:
+        r = NULL_DecompressQuery( info, (LPBITMAPINFO) lParam1,
+                                       (LPBITMAPINFO) lParam2 );
+        break;
+
+    case ICM_DECOMPRESS_GET_FORMAT:
+        r = NULL_DecompressGetFormat( info, (LPBITMAPINFO) lParam1,
+                                       (LPBITMAPINFO) lParam2 );
+        break;
+
+    case ICM_DECOMPRESS_GET_PALETTE:
+        FIXME("ICM_DECOMPRESS_GET_PALETTE\n");
+        break;
+
+    case ICM_DECOMPRESSEX_QUERY:
+        FIXME("ICM_DECOMPRESSEX_QUERY\n");
+        break;
+
+    case ICM_DECOMPRESS:
+        r = NULL_Decompress( info, (ICDECOMPRESS*) lParam1,
+                                  (DWORD) lParam2 );
+        break;
+
+    case ICM_DECOMPRESS_BEGIN:
+        r = NULL_DecompressBegin( info, (LPBITMAPINFO) lParam1,
+                                       (LPBITMAPINFO) lParam2 );
+        break;
+
+    case ICM_DECOMPRESSEX:
+        r = NULL_DecompressEx( info, (ICDECOMPRESSEX*) lParam1,
+                                  (DWORD) lParam2 );
+        break;
+
+    case ICM_DECOMPRESS_END:
+        r = ICERR_OK;
+        break;
+
+    case ICM_COMPRESS_QUERY:
+        r = ICERR_BADFORMAT;
+        /* fall through */
+    case ICM_COMPRESS_GET_FORMAT:
+    case ICM_COMPRESS_END:
+    case ICM_COMPRESS:
+        FIXME("compression not implemented\n");
+        break;
+
+    case ICM_CONFIGURE:
+        break;
+
+    default:
+        FIXME("Unknown message: %04x %ld %ld\n", msg, lParam1, lParam2);
+    }
+
+    return r;
+}
+
+/***********************************************************************
+ *		DllMain
+ */
+BOOL WINAPI DllMain(HINSTANCE hModule, DWORD dwReason, LPVOID lpReserved)
+{
+    TRACE("(%p,%d,%p)\n", hModule, dwReason, lpReserved);
+
+    switch (dwReason)
+    {
+    case DLL_PROCESS_ATTACH:
+        DisableThreadLibraryCalls(hModule);
+        NULL_hModule = hModule;
+        break;
+    }
+    return TRUE;
+}
diff --git a/dlls/nullvidc/nullvidc.rc b/dlls/nullvidc/nullvidc.rc
new file mode 100644
index 0000000000..399cb14e59
--- /dev/null
+++ b/dlls/nullvidc/nullvidc.rc
@@ -0,0 +1,11 @@
+#include "nullvidc_private.h"
+
+#pragma makedep po
+
+LANGUAGE LANG_ENGLISH, SUBLANG_DEFAULT
+
+STRINGTABLE
+{
+    IDS_NAME "#msgctxt#do not translate#MS-NULL"
+    IDS_DESCRIPTION "Wine null video codec"
+}
diff --git a/dlls/nullvidc/nullvidc.spec b/dlls/nullvidc/nullvidc.spec
new file mode 100644
index 0000000000..aec2706b8e
--- /dev/null
+++ b/dlls/nullvidc/nullvidc.spec
@@ -0,0 +1 @@
+@ stdcall -private DriverProc(long long long long long) NULL_DriverProc
diff --git a/dlls/nullvidc/nullvidc_private.h b/dlls/nullvidc/nullvidc_private.h
new file mode 100644
index 0000000000..f087460e56
--- /dev/null
+++ b/dlls/nullvidc/nullvidc_private.h
@@ -0,0 +1,9 @@
+#ifndef __NULLVIDC_PRIVATE_H
+#define __NULLVIDC_PRIVATE_H
+
+#include <windef.h>
+
+#define IDS_NAME        100
+#define IDS_DESCRIPTION 101
+
+#endif /* __NULLVIDC_PRIVATE_H */
-- 
2.25.1