recon.c 3.5 KB
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/*
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 *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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 *
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 *  Use of this source code is governed by a BSD-style license
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 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
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 *  in the file PATENTS.  All contributing project authors may
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 *  be found in the AUTHORS file in the root of the source tree.
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 */


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#include "vpx_ports/config.h"
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#include "vpx_rtcd.h"
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#include "blockd.h"

void vp8_recon_b_c
(
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  unsigned char *pred_ptr,
  short *diff_ptr,
  unsigned char *dst_ptr,
  int stride
) {
  int r, c;

  for (r = 0; r < 4; r++) {
    for (c = 0; c < 4; c++) {
      int a = diff_ptr[c] + pred_ptr[c];

      if (a < 0)
        a = 0;

      if (a > 255)
        a = 255;

      dst_ptr[c] = (unsigned char) a;
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    }
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    dst_ptr += stride;
    diff_ptr += 16;
    pred_ptr += 16;
  }
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}

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void vp8_recon_uv_b_c
(
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  unsigned char *pred_ptr,
  short *diff_ptr,
  unsigned char *dst_ptr,
  int stride
) {
  int r, c;

  for (r = 0; r < 4; r++) {
    for (c = 0; c < 4; c++) {
      int a = diff_ptr[c] + pred_ptr[c];

      if (a < 0)
        a = 0;

      if (a > 255)
        a = 255;

      dst_ptr[c] = (unsigned char) a;
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    }
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    dst_ptr += stride;
    diff_ptr += 8;
    pred_ptr += 8;
  }
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}
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void vp8_recon4b_c
(
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  unsigned char *pred_ptr,
  short *diff_ptr,
  unsigned char *dst_ptr,
  int stride
) {
  int r, c;

  for (r = 0; r < 4; r++) {
    for (c = 0; c < 16; c++) {
      int a = diff_ptr[c] + pred_ptr[c];

      if (a < 0)
        a = 0;

      if (a > 255)
        a = 255;

      dst_ptr[c] = (unsigned char) a;
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    }
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    dst_ptr += stride;
    diff_ptr += 16;
    pred_ptr += 16;
  }
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}

void vp8_recon2b_c
(
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  unsigned char *pred_ptr,
  short *diff_ptr,
  unsigned char *dst_ptr,
  int stride
) {
  int r, c;

  for (r = 0; r < 4; r++) {
    for (c = 0; c < 8; c++) {
      int a = diff_ptr[c] + pred_ptr[c];

      if (a < 0)
        a = 0;

      if (a > 255)
        a = 255;

      dst_ptr[c] = (unsigned char) a;
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    }
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    dst_ptr += stride;
    diff_ptr += 8;
    pred_ptr += 8;
  }
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}

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#if CONFIG_SUPERBLOCKS
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void vp8_recon_mby_s_c(MACROBLOCKD *xd, uint8_t *dst) {
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  int x, y;
  BLOCKD *b = &xd->block[0];
  int stride = b->dst_stride;
  short *diff = b->diff;

  for (y = 0; y < 16; y++) {
    for (x = 0; x < 16; x++) {
      int a = dst[x] + diff[x];
      if (a < 0)
        a = 0;
      else if (a > 255)
        a = 255;
      dst[x] = a;
    }
    dst += stride;
    diff += 16;
  }
}

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void vp8_recon_mbuv_s_c(MACROBLOCKD *xd, uint8_t *udst, uint8_t *vdst) {
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  int x, y, i;
  uint8_t *dst = udst;

  for (i = 0; i < 2; i++, dst = vdst) {
    BLOCKD *b = &xd->block[16 + 4 * i];
    int stride = b->dst_stride;
    short *diff = b->diff;

    for (y = 0; y < 8; y++) {
      for (x = 0; x < 8; x++) {
        int a = dst[x] + diff[x];
        if (a < 0)
          a = 0;
        else if (a > 255)
          a = 255;
        dst[x] = a;
      }
      dst += stride;
      diff += 8;
    }
  }
}
#endif

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void vp8_recon_mby_c(MACROBLOCKD *xd) {
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  int i;
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  for (i = 0; i < 16; i += 4) {
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    BLOCKD *b = &xd->block[i];
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    vp8_recon4b(b->predictor, b->diff, *(b->base_dst) + b->dst, b->dst_stride);
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  }
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}

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void vp8_recon_mb_c(MACROBLOCKD *xd) {
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  int i;
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  for (i = 0; i < 16; i += 4) {
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    BLOCKD *b = &xd->block[i];
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    vp8_recon4b(b->predictor, b->diff, *(b->base_dst) + b->dst, b->dst_stride);
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  }
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  for (i = 16; i < 24; i += 2) {
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    BLOCKD *b = &xd->block[i];
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    vp8_recon2b(b->predictor, b->diff, *(b->base_dst) + b->dst, b->dst_stride);
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  }
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}