shithub: openh264

ref: 7dfc49ec396f4aa82f98d5dae297cd33bb534cdf
dir: /codec/processing/src/scrolldetection/ScrollDetection.cpp/

/*!
 * \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
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 */


#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 || pRefPixMap->pPixel[1] == NULL || pRefPixMap->pPixel[2] == NULL
    || pSrcPixMap->pPixel[0] == NULL || pSrcPixMap->pPixel[1] == NULL || pSrcPixMap->pPixel[2] == 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;

    m_sScrollDetectionParam.iScrollMvX = 0;
    m_sScrollDetectionParam.iScrollMvY = 0;
    m_sScrollDetectionParam.bScrollDetectFlag = false;

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

    if (m_sScrollDetectionParam.bScrollDetectFlag && m_sScrollDetectionParam.iScrollMvY)
      break;
  }
}

WELSVP_NAMESPACE_END