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Full Discussion: C++ ASCI int values
Top Forums Programming C++ ASCI int values Post 302357663 by pondlife on Wednesday 30th of September 2009 10:25:20 AM
Old 09-30-2009
Quote:
Originally Posted by pludi
Nope. Both the signed and the unsigned char type are 1 Byte (8 bits) in size. The difference is that for a signed type, the MSB (most significant bit) is the sign indicator. So an unsigned char can go from 0 (0000 0000) to 255 (1111 1111), while a signed goes from 0 (0000 0000) to 127 (0111 1111) and -128 (1000 0000) to -1 (1111 1111)
Ahh, yes. I think I've got it. Both have the same number of bits available but the signed char has the MSB reserved for its sign indicator.

It's good to get the basics down early on Smilie

Thanks for your help Smilie
 

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LEARN ABOUT SUNOS

mlib_videocoloryuv444seq_to_abgrint

mlib_VideoColorYUV444seq_to_ABGRint(3MLIB)		    mediaLib Library Functions			mlib_VideoColorYUV444seq_to_ABGRint(3MLIB)

NAME

       mlib_VideoColorYUV444seq_to_ABGRint - color convert YUV sequential to ABGR interleaved

SYNOPSIS

       cc [ flag... ] file... -lmlib [ library... ]
       #include <mlib.h>

       void  mlib_VideoColorYUV444seq_to_ABGRint(mlib_u32  *ABGR,  const  mlib_u8  *Y, const mlib_u8 *U, const mlib_u8 *V, const mlib_u8 *A_array,
       mlib_u8 A_const, mlib_s32 w, mlib_s32 h, mlib_s32 dlb, mlib_s32 slb);

DESCRIPTION

       The Y, U, V pixel streams are 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.

       Y	       Pointer to Y input buffer.

       U	       Pointer to U input buffer.

       V	       Pointer to V 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 buffers.

RETURN VALUES

       None.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+
       |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_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),    mlib_VideoColorUYV444int_to_ABGRint(3MLIB),
       attributes(5)

SunOS 5.10							    10 Nov 2004 			mlib_VideoColorYUV444seq_to_ABGRint(3MLIB)
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