img_pix_sat_c.c

dm642函数库

/* ======================================================================== */
/*  TEXAS INSTRUMENTS, INC.                                                 */
/*                                                                          */
/*  IMGLIB  DSP Image/Video Processing Library                              */
/*                                                                          */
/*  This library contains proprietary intellectual property of Texas        */
/*  Instruments, Inc.  The library and its source code are protected by     */
/*  various copyrights, and portions may also be protected by patents or    */
/*  other legal protections.                                                */
/*                                                                          */
/*  This software is licensed for use with Texas Instruments TMS320         */
/*  family DSPs.  This license was provided to you prior to installing      */
/*  the software.  You may review this license by consulting the file       */
/*  TI_license.PDF which accompanies the files in this library.             */
/* ------------------------------------------------------------------------ */
/*          Copyright (C) 2002 Texas Instruments, Incorporated.             */
/*                          All Rights Reserved.                            */
/* ======================================================================== */


/* ======================================================================== */
/*  TEXAS INSTRUMENTS, INC.                                                 */
/*                                                                          */
/*  NAME                                                                    */
/*      IMG_pix_sat                                                         */
/*                                                                          */
/*  REVISION DATE                                                           */
/*      02-Oct-2000                                                         */
/*                                                                          */
/*  USAGE                                                                   */
/*      This routine is C callable, and has the following C prototype:      */
/*                                                                          */
/*          void IMG_pix_sat                                                */
/*          (                                                               */
/*              int n,                            // Number of pixels //    */
/*              const short   *restrict in_data,  // Incoming data    //    */
/*              unsigned char *restrict out_data  // Outgoing data    //    */
/*          );                                                              */
/*                                                                          */
/*      This code performs the saturation of 16 bit signed numbers          */
/*      to 8 bit unsigned numbers. If the data is over 255 it is            */
/*      saturated to 255, if it is less than 0 it is saturated to 0.        */
/*                                                                          */
/*  DESCRIPTION                                                             */
/*      The function IMG_pix_sat() takes signed 16-bit input pixels and     */
/*      saturates them to unsigned 8-bit results.  Pixel values above       */
/*      255 are clamped to 255, and values below 0 are clamped to 0.        */
/*                                                                          */
/* ------------------------------------------------------------------------ */
/*            Copyright (c) 2002 Texas Instruments, Incorporated.           */
/*                           All Rights Reserved.                           */
/* ======================================================================== */
void IMG_pix_sat_c
(
    int                     n,
    const short   *restrict in_data,
    unsigned char *restrict out_data
)
{
    int i, pixel;

    for (i = 0; i < n; i++)
    {
        pixel = in_data[i];
        if (pixel > 0xFF)
        {
            out_data[i] = 0xFF;
        } else if (pixel < 0x00)
        {
            out_data[i] = 0x00;
        } else
        {
            out_data[i] = pixel;
        }
    }
}

/* ======================================================================== */
/*  End of file:  img_pix_sat.c                                             */
/* ------------------------------------------------------------------------ */
/*            Copyright (c) 2002 Texas Instruments, Incorporated.           */
/*                           All Rights Reserved.                           */
/* ======================================================================== */