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Full Discussion: HP-UX 10.20 devices
Operating Systems HP-UX HP-UX 10.20 devices Post 14681 by LivinFree on Tuesday 5th of February 2002 05:02:51 AM
Old 02-05-2002
A simple way of looking at it is to say:

cat /dev/null > my_file
will make my_file zero-length, whereas

cat /dev/zero > my_file
will fill the file with NULL characters...

$ dd if=/dev/zero of=/my/home/test_file bs=1 count=10
$ xd test_file
0000000 0000 0000 0000 0000 0000
000000a
$

Be carefull not to "cat" zero zero to anywhere, lest your filesystem fill up relatively quickly...
 

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mlib_VideoColorUYV444int_to_ABGRint(3MLIB)		    mediaLib Library Functions			mlib_VideoColorUYV444int_to_ABGRint(3MLIB)

NAME
mlib_VideoColorUYV444int_to_ABGRint - color convert UYV interleaved to ABGR interleaved SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ] #include <mlib.h> void mlib_VideoColorUYV444int_to_ABGRint(mlib_u32 *ABGR, const mlib_u8 *UYV,const mlib_u8 *A_array, mlib_u8 A_const, mlib_s32 w,mlib_s32 h, mlib_s32 dlb, mlib_s32 slb, mlib_s32 alb); DESCRIPTION
The UYV pixel stream is converted into an ABGR pixel stream. All pixel components are 8-bit unsigned integers. All buffers have dimensions w and h. The alpha values for this function work in the following fashion: o If A_array pointer is not NULL, the values are taken from there. It has to have the same dimensions as the Y buffer. o If A_array pointer is NULL, the alpha values for every pixel are set to A_const. The following equation is used: |R| |1.1644 0.0000 1.5966| [|Y| | 16.0000|] |G| = |1.1644 -0.3920 -0.8132| * [|U| - |128.0000|] |B| |1.1644 2.0184 0.0000| [|V| |128.0000|] PARAMETERS
The function takes the following arguments: ABGR Pointer to output buffer. UYV Pointer to input buffer. A_array Array of alpha values. A_const Constant alpha value. w Image width in pixels. h Image height in lines. dlb Linebytes for output buffer. slb Linebytes for input buffer. alb Linebytes for alpha buffer. RETURN VALUES
None. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Committed | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
mlib_VideoColorYUV420seq_to_ARGBint(3MLIB), mlib_VideoColorYUV411seq_to_ARGBint(3MLIB), mlib_VideoColorYUV422seq_to_ARGBint(3MLIB), mlib_VideoColorYUV444seq_to_ARGBint(3MLIB), mlib_VideoColorYUV420seq_to_ABGRint(3MLIB), mlib_VideoColorYUV411seq_to_ABGRint(3MLIB), mlib_VideoColorYUV422seq_to_ABGRint(3MLIB), mlib_VideoColorYUV444seq_to_ABGRint(3MLIB), mlib_VideoColorYUYV422int_to_ARGBint(3MLIB), mlib_VideoColorYUV444int_to_ARGBint(3MLIB), mlib_VideoColorYUYV422int_to_ABGRint(3MLIB), mlib_VideoColorYUV444int_to_ABGRint(3MLIB), mlib_VideoColorUYVY422int_to_ARGBint(3MLIB), mlib_VideoColorUYVY422int_to_ABGRint(3MLIB), mlib_VideoColorUYV444int_to_ARGBint(3MLIB), attributes(5) SunOS 5.11 2 Mar 2007 mlib_VideoColorUYV444int_to_ABGRint(3MLIB)
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