source/common/loopfilter.cpp

   1 /*****************************************************************************
   2 * Copyright (C) 2013 x265 project
   3 *
   4 * Authors: Praveen Kumar Tiwari <praveen@multicorewareinc.com>
   5 *          Dnyaneshwar Gorade <dnyaneshwar@multicorewareinc.com>
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License as published by
   9 * the Free Software Foundation; either version 2 of the License, or
  10 * (at your option) any later version.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU General Public License
  18 * along with this program; if not, write to the Free Software
  19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111, USA.
  20 *
  21 * This program is also available under a commercial proprietary license.
  22 * For more information, contact us at license @ x265.com.
  23 *****************************************************************************/
  24
  25 #include "common.h"
  26 #include "primitives.h"
  27
  28 #define PIXEL_MIN 0
  29 #define PIXEL_MAX ((1 << X265_DEPTH) - 1)
  30
  31 void processSaoCUE0(pixel * rec, int8_t * offsetEo, int width, int8_t signLeft)
  32 {
  33     int x;
  34     int8_t signRight;
  35     int8_t edgeType;
  36
  37     for (x = 0; x < width; x++)
  38     {
  39         signRight = ((rec[x] - rec[x + 1]) < 0) ? -1 : ((rec[x] - rec[x + 1]) > 0) ? 1 : 0;
  40         edgeType = signRight + signLeft + 2;
  41         signLeft  = -signRight;
  42
  43         short v = rec[x] + offsetEo[edgeType];
  44         rec[x] = (pixel)(v < 0 ? 0 : (v > (PIXEL_MAX)) ? (PIXEL_MAX) : v);
  45     }
  46 }
  47
  48 namespace x265 {
  49 void Setup_C_LoopFilterPrimitives(EncoderPrimitives &p)
  50 {
  51     p.saoCuOrgE0 = processSaoCUE0;
  52 }
  53 }