how to convert data from ASCII to Packed Decimal

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sdl_overlay

SDL_Overlay(3)							 SDL API Reference						    SDL_Overlay(3)

NAME

       SDL_Overlay - YUV video overlay

STRUCTURE DEFINITION

       typedef struct{
	 Uint32 format;
	 int w, h;
	 int planes;
	 Uint16 *pitches;
	 Uint8 **pixels;
	 Uint32 hw_overlay:1;
       } SDL_Overlay;

STRUCTURE DATA

       format		   Overlay format (see below)

       w, h		   Width and height of overlay

       planes		   Number of planes in the overlay. Usually either 1 or 3

       pitches		   An array of pitches, one for each plane. Pitch is the length of a row in bytes.

       pixels		   An array of pointers to teh data of each plane. The overlay should be locked before these pointers are used.

       hw_overlay	   This will be set to 1 if the overlay is hardware accelerated.

DESCRIPTION

       A  SDL_Overlay  is similar to a SDL_Surface except it stores a YUV overlay. All the fields are read only, except for pixels which should be
       locked before use. The format field stores the format of the overlay which is one of the following:

       #define SDL_YV12_OVERLAY  0x32315659  /* Planar mode: Y + V + U */
       #define SDL_IYUV_OVERLAY  0x56555949  /* Planar mode: Y + U + V */
       #define SDL_YUY2_OVERLAY  0x32595559  /* Packed mode: Y0+U0+Y1+V0 */
       #define SDL_UYVY_OVERLAY  0x59565955  /* Packed mode: U0+Y0+V0+Y1 */
       #define SDL_YVYU_OVERLAY  0x55595659  /* Packed mode: Y0+V0+Y1+U0 */

	More   information    on    YUV    formats    can    be    found    at	  http://www.webartz.com/fourcc/indexyuv.htm	(link	 to    URL
       http://www.webartz.com/fourcc/indexyuv.htm) .

SEE ALSO

       SDL_CreateYUVOverlay, SDL_LockYUVOverlay, SDL_UnlockYUVOverlay, SDL_FreeYUVOverlay

SDL
							      Tue 11 Sep 2001, 23:01						    SDL_Overlay(3)

Shell Programming and Scripting