omxipbm_addc_u8_c1r_sfs.c

The OpenMAX DL (Development Layer) APIs contain a comprehensive set of audio, video, signal processi

/**
*
* 
* File Name:  omxIPBM_AddC_U8_C1R_Sfs.c
* OpenMAX DL: v1.0.2
* Revision:   10586
* Date:       Wednesday, March 5, 2008
* 
* (c) Copyright 2007-2008 ARM Limited. All Rights Reserved.
* 
* 
*
* Description  : Image arithmetic operation - Add a constant to every
*                pixel in the ROI of a single channel source image.
*/

#include "omxtypes.h"
#include "armCOMM.h"
#include "armOMX.h"
#include "omxIP.h"

/**
 * Function:  omxIPBM_AddC_U8_C1R_Sfs   (4.2.1.2.2)
 *
 * Description:
 * Computes corresponding arithmetic operation with a constant and each 
 * element of the source ROI and places the scaled result in the destination 
 * image referenced by the pointer pDst. 
 *
 * Input Arguments:
 *   
 *   pSrc - pointer to the source ROI 
 *   srcStep - distance in bytes between the starts of consecutive lines in 
 *            the source image 
 *   value - constant for operation 
 *   dstStep - distance in bytes between the starts of consecutive lines in 
 *            the destination image 
 *   roiSize - size of the source and destination ROI in pixels 
 *   scaleFactor - scale factor value, valid in the range [-7,7] 
 *
 * Output Arguments:
 *   
 *   pDst - pointer to the destination ROI 
 *
 * Return Value:
 *    
 *    OMX_Sts_NoErr - no errors detected 
 *    OMX_Sts_BadArgErr - bad arguments detected; at least one of the 
 *              following is true: 
 *    -    pSrc or pDst is NULL 
 *    -    srcStep or dstStep is less than or equal to zero 
 *    -    roiSize has a field with zero or negative value. 
 *    -    scaleFactor is outside the range [-7,7] 
 *
 */
 
OMXResult omxIPBM_AddC_U8_C1R_Sfs(
                                      const OMX_U8* pSrc,
                                      OMX_INT srcStep,
                                      OMX_U8 value,
                                      OMX_U8* pDst,
                                      OMX_INT dstStep,
                                      OMXSize roiSize,
                                      OMX_INT scaleFactor
                                      )
{
    OMX_INT addWidth    = roiSize.width;
    OMX_INT addHeight   = roiSize.height;
    OMX_U16 round       = 0;
    OMX_INT i, j;

    armRetArgErrIf(!pSrc, OMX_Sts_BadArgErr);
    armRetArgErrIf(!pDst, OMX_Sts_BadArgErr);
    armRetArgErrIf(srcStep <= 0, OMX_Sts_BadArgErr);
    armRetArgErrIf(dstStep <= 0, OMX_Sts_BadArgErr);
    armRetArgErrIf(roiSize.width <= 0, OMX_Sts_BadArgErr);
    armRetArgErrIf(roiSize.height <= 0, OMX_Sts_BadArgErr);
    armRetArgErrIf(scaleFactor < -7 || scaleFactor > 7, OMX_Sts_BadArgErr);

    if(scaleFactor > 0)
    {
        round   = 1 << (scaleFactor - 1);   
    }
    if(scaleFactor >= 0)
    {
        for(i=0; i<addHeight; i++, pSrc+=srcStep, pDst+=dstStep)
        {
            for(j=0; j<addWidth; j++)
            {
                pDst[j] = (OMX_U8) armClip(OMX_MIN_U8, OMX_MAX_U8, (pSrc[j] + value + round) >> scaleFactor);
            }
        }
    }
    else
    {

        for(i=0; i<addHeight; i++, pSrc+=srcStep, pDst+=dstStep)
        {
            for(j=0; j<addWidth; j++)
            {
                pDst[j] = (OMX_U8) armClip(OMX_MIN_U8, OMX_MAX_U8, (pSrc[j] + value + round) << -scaleFactor);
            }
        }
    }
    return OMX_Sts_NoErr;
}

/* End of file */