omxipcs_ycbcr444tobgr888_u8_c3r.c

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

/**
 *
 * 
 * File Name:  omxIPCS_YCbCr444ToBGR888_U8_C3R.c
 * OpenMAX DL: v1.0.2
 * Revision:   10586
 * Date:       Wednesday, March 5, 2008
 * 
 * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved.
 * 
 * 
 *
 * Description  : Colour Conversion Routine - YUV444 to BGR888 in floating point.
 *                Both source and destination images are three-channel format.
 *
 */

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


/**
 * Function:  omxIPCS_YCbCr444ToBGR888_U8_C3R   (4.4.3.1.2)
 *
 * Description:
 * Converts a pixel-oriented YCbCr444 image to BGR888 or BGR565 color space.  
 * The ROI of the source image is pointed to by pSrc, and the result is placed 
 * into the ROI of the destination image pointed to by pDst. The input and 
 * output images are organized, respectively, as specified by the Table 4-1 
 * entries labeled  YCbCr444  and  BGR888 / BGR565.  
 *
 * Input Arguments:
 *   
 *   pSrc - pointer to the source ROI 
 *   srcStep - distance in bytes between the starts of consecutive lines in 
 *            the source image 
 *   dstStep - distance in bytes between the starts of consecutive lines in 
 *            the destination image 
 *   roiSize - size of the source and destination ROI in pixels 
 *
 * Output Arguments:
 *   
 *   pDst - pointer to the destination ROI 
 *
 * Return Value:
 *    
 *    OMX_Sts_NoErr - no error 
 *    OMX_Sts_BadArgErr - bad arguments detected; at least one of the 
 *              following is true: 
 *    -   pSrc or pDst is NULL 
 *    -   srcStep/3 < roiSize.width 
 *    -   omxIPCS_YCbCr444ToBGR888_U8_C3R() only: dstStep/3 < roiSize.width 
 *    -   omxIPCS_YCbCr444ToBGR565_U8_U16_C3R() only: dstStep/2 < roiSize.width 
 *    -   roiSize has a field with zero or negative value 
 *
 */
 
OMXResult omxIPCS_YCbCr444ToBGR888_U8_C3R(
        const OMX_U8 *pSrc,
        OMX_INT srcStep,
        OMX_U8 *pDst,
        OMX_INT dstStep,
        OMXSize roiSize
       )
{
    OMX_INT convWidth   = 3 * roiSize.width; /* convWidth is the bytes to read */
    OMX_INT convHeight  = roiSize.height;
    OMX_U8  Ydata, Udata, Vdata;
    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(srcStep/3 < roiSize.width, OMX_Sts_BadArgErr);
    armRetArgErrIf(dstStep/3 < roiSize.width, OMX_Sts_BadArgErr);
    for(i=0; i<convHeight; i++, pSrc+=srcStep, pDst+=dstStep)
    {
        for(j=0; j<convWidth; j+=3)
        {
            Ydata = pSrc[j];
            Udata = pSrc[j+1];
            Vdata = pSrc[j+2];
            armIPCS_ComputeRGBFromYUV_F32_U8(Ydata, Udata, Vdata, &pDst[j+2], &pDst[j+1], &pDst[j]);
        }
    }
    return OMX_Sts_NoErr;
}

/* End of file */