void YuvToRgbTask::kernel()

in renderscript-toolkit/src/main/cpp/YuvToRgb.cpp [122:231]
46 lines of code
11 McCabe index (conditional complexity)

void YuvToRgbTask::kernel(uchar4 *out, uint32_t xstart, uint32_t xend, uint32_t currentY) {
    //ALOGI("kernel out %p, xstart=%u, xend=%u, currentY=%u", out, xstart, xend, currentY);

    const uchar *y = mInY + (currentY * mStrideY);
    const uchar *v = mInV + ((currentY >> 1) * mStrideV);
    const uchar *u = mInU + ((currentY >> 1) * mStrideU);

    //ALOGI("pinY %p, pinV %p, pinU %p", pinY, pinV, pinU);

    uint32_t x1 = xstart;
    uint32_t x2 = xend;

    /*
    ALOGE("pinY, %p, Y, %p, currentY, %d, strideY, %zu", pinY, y, currentY, mStrideY);
    ALOGE("pinU, %p, U, %p, currentY, %d, strideU, %zu", pinU, u, currentY, mStrideU);
    ALOGE("pinV, %p, V, %p, currentY, %d, strideV, %zu", pinV, v, currentY, mStrideV);
    ALOGE("dimX, %d, dimY, %d", cp->alloc->mHal.drvState.lod[0].dimX,
          cp->alloc->mHal.drvState.lod[0].dimY);
    ALOGE("info->dim.x, %d, info->dim.y, %d", info->dim.x, info->dim.y);
    uchar* pinY = (uchar*)mInY;
    uchar* pinU = (uchar*)mInU;
    uchar* pinV = (uchar*)mInV;
    ALOGE("Y %p %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx "
          "%02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx",
          pinY, pinY[0], pinY[1], pinY[2], pinY[3], pinY[4], pinY[5], pinY[6], pinY[7], pinY[8],
          pinY[9], pinY[10], pinY[11], pinY[12], pinY[13], pinY[14], pinY[15]);
    ALOGE("Y %p %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx "
          "%02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx",
          pinY, pinY[16], pinY[17], pinY[18], pinY[19], pinY[20], pinY[21], pinY[22], pinY[23],
          pinY[24], pinY[25], pinY[26], pinY[27], pinY[28], pinY[29], pinY[30], pinY[31]);
    ALOGE("Y %p %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx "
          "%02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx",
          pinY, pinY[32], pinY[33], pinY[34], pinY[35], pinY[36], pinY[37], pinY[38], pinY[39],
          pinY[40], pinY[41], pinY[42], pinY[43], pinY[44], pinY[45], pinY[46], pinY[47]);

    ALOGE("U %p %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx "
          "%02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx",
          pinU, pinU[0], pinU[1], pinU[2], pinU[3], pinU[4], pinU[5], pinU[6], pinU[7], pinU[8],
          pinU[9], pinU[10], pinU[11], pinU[12], pinU[13], pinU[14], pinU[15]);
    ALOGE("U %p %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx "
          "%02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx",
          pinU, pinU[16], pinU[17], pinU[18], pinU[19], pinU[20], pinU[21], pinU[22], pinU[23],
          pinU[24], pinU[25], pinU[26], pinU[27], pinU[28], pinU[29], pinU[30], pinU[31]);
    ALOGE("U %p %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx "
          "%02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx",
          pinU, pinU[32], pinU[33], pinU[34], pinU[35], pinU[36], pinU[37], pinU[38], pinU[39],
          pinU[40], pinU[41], pinU[42], pinU[43], pinU[44], pinU[45], pinU[46], pinU[47]);

    ALOGE("V %p %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx "
          "%02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx",
          pinV, pinV[0], pinV[1], pinV[2], pinV[3], pinV[4], pinV[5], pinV[6], pinV[7], pinV[8],
          pinV[9], pinV[10], pinV[11], pinV[12], pinV[13], pinV[14], pinV[15]);
    ALOGE("V %p %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx "
          "%02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx",
          pinV, pinV[16], pinV[17], pinV[18], pinV[19], pinV[20], pinV[21], pinV[22], pinV[23],
          pinV[24], pinV[25], pinV[26], pinV[27], pinV[28], pinV[29], pinV[30], pinV[31]);
    ALOGE("V %p %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx "
          "%02hhx %02hhx %02hhx %02hhx %02hhx %02hhx %02hhx",
          pinV, pinV[32], pinV[33], pinV[34], pinV[35], pinV[36], pinV[37], pinV[38], pinV[39],
          pinV[40], pinV[41], pinV[42], pinV[43], pinV[44], pinV[45], pinV[46], pinV[47]);
    */

    /* If we start on an odd pixel then deal with it here and bump things along
     * so that subsequent code can carry on with even-odd pairing assumptions.
     */
    if((x1 & 1) && (x2 > x1)) {
        int cx = (x1 >> 1) * mCstep;
        *out = rsYuvToRGBA_uchar4(y[x1], u[cx], v[cx]);
        out++;
        x1++;
    }

#if defined(ARCH_ARM_USE_INTRINSICS)
    if((x2 > x1) && mUsesSimd) {
        int32_t len = x2 - x1;
        if (mCstep == 1) {
            rsdIntrinsicYuv2_K(out, y, u, v, x1, x2);
            x1 += len;
            out += len;
        } else if (mCstep == 2) {
            // Check for proper interleave
            intptr_t ipu = (intptr_t)u;
            intptr_t ipv = (intptr_t)v;

            if (ipu == (ipv + 1)) {
                rsdIntrinsicYuv_K(out, y, v, x1, x2);
                x1 += len;
                out += len;
            } else if (ipu == (ipv - 1)) {
                rsdIntrinsicYuvR_K(out, y, u, x1, x2);
                x1 += len;
                out += len;
            }
        }
    }
#endif

    if(x2 > x1) {
       // ALOGE("y %i  %i  %i", currentY, x1, x2);
        while(x1 < x2) {
            int cx = (x1 >> 1) * mCstep;
            *out = rsYuvToRGBA_uchar4(y[x1], u[cx], v[cx]);
            out++;
            x1++;
            *out = rsYuvToRGBA_uchar4(y[x1], u[cx], v[cx]);
            out++;
            x1++;
        }
    }
}