shithub: openh264

ref: 44a49b1fef3d2f50f313e1118eb193934c3bf621
dir: /codec/processing/src/scenechangedetection/SceneChangeDetectionCommon.cpp/

/*!
 * \copy
 *     Copyright (c)  2013, Cisco Systems
 *     All rights reserved.
 *
 *     Redistribution and use in source and binary forms, with or without
 *     modification, are permitted provided that the following conditions
 *     are met:
 *
 *        * Redistributions of source code must retain the above copyright
 *          notice, this list of conditions and the following disclaimer.
 *
 *        * Redistributions in binary form must reproduce the above copyright
 *          notice, this list of conditions and the following disclaimer in
 *          the documentation and/or other materials provided with the
 *          distribution.
 *
 *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *     "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *     LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 *     FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 *     COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 *     INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 *     BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 *     CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 *     LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 *     ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 *     POSSIBILITY OF SUCH DAMAGE.
 *
 */

#include "SceneChangeDetectionCommon.h"

WELSVP_NAMESPACE_BEGIN


int32_t WelsSampleSad8x8_c (uint8_t* pSrcY, int32_t iSrcStrideY, uint8_t* pRefY, int32_t iRefStrideY) {
  int32_t iSadSum = 0;
  uint8_t* pSrcA = pSrcY;
  uint8_t* pSrcB = pRefY;
  for (int32_t i = 0; i < 8; i++) {
    iSadSum += WELS_ABS ((pSrcA[0] - pSrcB[0]));
    iSadSum += WELS_ABS ((pSrcA[1] - pSrcB[1]));
    iSadSum += WELS_ABS ((pSrcA[2] - pSrcB[2]));
    iSadSum += WELS_ABS ((pSrcA[3] - pSrcB[3]));
    iSadSum += WELS_ABS ((pSrcA[4] - pSrcB[4]));
    iSadSum += WELS_ABS ((pSrcA[5] - pSrcB[5]));
    iSadSum += WELS_ABS ((pSrcA[6] - pSrcB[6]));
    iSadSum += WELS_ABS ((pSrcA[7] - pSrcB[7]));

    pSrcA += iSrcStrideY;
    pSrcB += iRefStrideY;
  }

  return iSadSum;
}

WELSVP_NAMESPACE_END