|
ICCompressBegin
The ICCompressBegin macro notifies a video compression driver to prepare to compress data. You
can use this macro or explicitly call the ICM_COMPRESS_BEGIN message.
DWORD ICCompressBegin(
hic,
|
| lpbiInput,
|
| lpbiOutput
|
| );
|
|
Parameters
hic
Handle of a compressor.
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 specified compression is supported 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 ICCompressBegin macro. The ICCompressBegin and ICCompressEnd 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, ICCompressEnd, ICM_COMPRESS_BEGIN
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