|
ICM_COMPRESS_BEGIN
The ICM_COMPRESS_BEGIN message notifies a video compression driver to prepare
to compress data. You can send this message explicitly or by using the ICCompressBegin macro.
ICM_COMPRESS_BEGIN
wParam = (DWORD) (LPVOID) lpbiInput;
lParam = (DWORD) (LPVOID) lpbiOutput;
Parameters
lpbiInput
Address of a BITMAPINFO structure containing the input format.
lpbiOutput
Address of a BITMAPINFO structure containing the output format.
Return Values
Returns ICERR_OK if the driver supports the specified compression or
ICERR_BADFORMAT if the input or output format is not supported.
Remarks
The driver should allocate and initialize any tables or memory that it needs
for compressing the data formats when it receives the ICM_COMPRESS message.
VCM saves the settings of the most recent ICM_COMPRESS_BEGIN message. The
ICM_COMPRESS_BEGIN and ICM_COMPRESS_END messages do not nest. If your driver
receives ICM_COMPRESS_BEGIN before compression is stopped with ICM_COMPRESS_END, it
should restart compression with new parameters.
See Also
BITMAPINFO, ICM_COMPRESS, ICM_COMPRESS_END, ICCompressBegin
Related Links
Software for Delphi and C++ Builder developers
Software for Visual Studio .NET developers
Software for Visual Basic 6 developers
Delphi Tips&Tricks
MegaDetailed.NET
More Online Helps
Win32 Programmer's Reference (win32.hlp)
OLE Programmer's Reference (ole.hlp)
Microsoft Windows Pen API Programmer's Reference (penapi.hlp)
Microsoft Windows Sockets 2 Reference (sock2.hlp)
Microsoft Windows Telephony API (TAPI) Programmer's Reference (tapi.hlp)
Unix Manual Pages
|
