/*!

 * \copy

 *     Copyright (c)  2009-2013, 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 "ScrollDetection.h"

#include "ScrollDetectionFuncs.h"

#include "cpu.h"

WELSVP_NAMESPACE_BEGIN

EResult CScrollDetection::Process (int32_t iType, SPixMap* pSrcPixMap, SPixMap* pRefPixMap) {

  if (pRefPixMap->pPixel[0] == NULL || pSrcPixMap->pPixel[0] == NULL ||

      pRefPixMap->sRect.iRectWidth != pSrcPixMap->sRect.iRectWidth

      || pRefPixMap->sRect.iRectHeight != pSrcPixMap->sRect.iRectHeight) {

    return RET_INVALIDPARAM;

  }

  if (!m_sScrollDetectionParam.bMaskInfoAvailable)

    ScrollDetectionWithoutMask (pSrcPixMap, pRefPixMap);

  else

    ScrollDetectionWithMask (pSrcPixMap, pRefPixMap);

  return RET_SUCCESS;

}

EResult CScrollDetection::Set (int32_t iType, void* pParam) {

  if (pParam == NULL) {

    return RET_INVALIDPARAM;

  }

  m_sScrollDetectionParam = * ((SScrollDetectionParam*)pParam);

  return RET_SUCCESS;

}

EResult CScrollDetection::Get (int32_t iType, void* pParam) {

  if (pParam == NULL) {

    return RET_INVALIDPARAM;

  }

  * ((SScrollDetectionParam*)pParam) = m_sScrollDetectionParam;

  return RET_SUCCESS;

}

void CScrollDetection::ScrollDetectionWithMask (SPixMap* pSrcPixMap, SPixMap* pRefPixMap) {

  int32_t iStartX, iStartY, iWidth, iHeight;

  iStartX = m_sScrollDetectionParam.sMaskRect.iRectLeft;

  iStartY = m_sScrollDetectionParam.sMaskRect.iRectTop;

  iWidth = m_sScrollDetectionParam.sMaskRect.iRectWidth;

  iHeight = m_sScrollDetectionParam.sMaskRect.iRectHeight;

  iWidth /= 2;

  iStartX += iWidth / 2;

  m_sScrollDetectionParam.iScrollMvX = 0;

  m_sScrollDetectionParam.iScrollMvY = 0;

  m_sScrollDetectionParam.bScrollDetectFlag = false;

  if (iStartX >= 0 && iWidth > MINIMUM_DETECT_WIDTH && iHeight > 2 * CHECK_OFFSET) {

    ScrollDetectionCore (pSrcPixMap, pRefPixMap, iWidth, iHeight, iStartX, iStartY, m_sScrollDetectionParam);

  }

}

void CScrollDetection::ScrollDetectionWithoutMask (SPixMap* pSrcPixMap, SPixMap* pRefPixMap) {

  int32_t iStartX, iStartY, iWidth, iHeight;

  const int32_t kiPicBorderWidth = pSrcPixMap->sRect.iRectHeight >> 4;

  const int32_t kiRegionWidth = (int) (pSrcPixMap->sRect.iRectWidth - (kiPicBorderWidth << 1)) / 3;

  const int32_t kiRegionHeight = (pSrcPixMap->sRect.iRectHeight * 7) >> 3;

  const int32_t kiHieghtStride = (int) pSrcPixMap->sRect.iRectHeight * 5 / 24;

  for (int32_t i = 0; i < REGION_NUMBER; i++) {

    iStartX = kiPicBorderWidth + (i % 3) * kiRegionWidth;

    iStartY = -pSrcPixMap->sRect.iRectHeight * 7 / 48 + (int) (i / 3) * (kiHieghtStride);

    iWidth = kiRegionWidth;

    iHeight = kiRegionHeight;

    iWidth /= 2;

    iStartX += iWidth / 2;

    ScrollDetectionCore (pSrcPixMap, pRefPixMap, iWidth, iHeight, iStartX, iStartY, m_sScrollDetectionParam);

    if (m_sScrollDetectionParam.bScrollDetectFlag && m_sScrollDetectionParam.iScrollMvY)

      break;

  }

}

WELSVP_NAMESPACE_END