vp9_picklpf.c

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

#include <assert.h>
#include <limits.h>
#include "vp9/common/vp9_onyxc_int.h"
#include "vp9/encoder/vp9_onyx_int.h"
#include "vp9/encoder/vp9_picklpf.h"
#include "vp9/encoder/vp9_quantize.h"
#include "vpx_mem/vpx_mem.h"
#include "vpx_scale/vpx_scale.h"
#include "vp9/common/vp9_alloccommon.h"
#include "vp9/common/vp9_loopfilter.h"
#include "./vpx_scale_rtcd.h"

void vp9_yv12_copy_partial_frame_c(YV12_BUFFER_CONFIG *src_ybc,
                                   YV12_BUFFER_CONFIG *dst_ybc, int fraction) {
  const int height = src_ybc->y_height;
  const int stride = src_ybc->y_stride;
  const int offset = stride * ((height >> 5) * 16 - 8);
  const int lines_to_copy = MAX(height >> (fraction + 4), 1) << 4;

  assert(src_ybc->y_stride == dst_ybc->y_stride);
  vpx_memcpy(dst_ybc->y_buffer + offset, src_ybc->y_buffer + offset,
             stride * (lines_to_copy + 16));
}

static int calc_partial_ssl_err(YV12_BUFFER_CONFIG *source,
                                YV12_BUFFER_CONFIG *dest, int Fraction) {
  int i, j;
  int Total = 0;
  int srcoffset, dstoffset;
  uint8_t *src = source->y_buffer;
  uint8_t *dst = dest->y_buffer;

  int linestocopy = (source->y_height >> (Fraction + 4));

  if (linestocopy < 1)
    linestocopy = 1;

  linestocopy <<= 4;


  srcoffset = source->y_stride   * (dest->y_height >> 5) * 16;
  dstoffset = dest->y_stride     * (dest->y_height >> 5) * 16;

  src += srcoffset;
  dst += dstoffset;

  // Loop through the Y plane raw and reconstruction data summing (square differences)
  for (i = 0; i < linestocopy; i += 16) {
    for (j = 0; j < source->y_width; j += 16) {
      unsigned int sse;
      Total += vp9_mse16x16(src + j, source->y_stride, dst + j, dest->y_stride,
                            &sse);
    }

    src += 16 * source->y_stride;
    dst += 16 * dest->y_stride;
  }

  return Total;
}