/*
 *  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 "vpx_config.h"
#include "vp9/encoder/vp9_variance.h"
#include "vp9/common/vp9_pragmas.h"
#include "vpx_ports/mem.h"

extern void filter_block1d_h6_mmx
(
  const unsigned char *src_ptr,
  unsigned short *output_ptr,
  unsigned int src_pixels_per_line,
  unsigned int pixel_step,
  unsigned int output_height,
  unsigned int output_width,
  short *vp7_filter
);
extern void filter_block1d_v6_mmx
(
  const short *src_ptr,
  unsigned char *output_ptr,
  unsigned int pixels_per_line,
  unsigned int pixel_step,
  unsigned int output_height,
  unsigned int output_width,
  short *vp7_filter
);

extern unsigned int vp9_get_mb_ss_mmx(const short *src_ptr);
extern unsigned int vp9_get8x8var_mmx
(
  const unsigned char *src_ptr,
  int  source_stride,
  const unsigned char *ref_ptr,
  int  recon_stride,
  unsigned int *SSE,
  int *Sum
);
extern unsigned int vp9_get4x4var_mmx
(
  const unsigned char *src_ptr,
  int  source_stride,
  const unsigned char *ref_ptr,
  int  recon_stride,
  unsigned int *SSE,
  int *Sum
);
extern void vp9_filter_block2d_bil4x4_var_mmx
(
  const unsigned char *ref_ptr,
  int ref_pixels_per_line,
  const unsigned char *src_ptr,
  int src_pixels_per_line,
  const short *HFilter,
  const short *VFilter,
  int *sum,
  unsigned int *sumsquared
);
extern void vp9_filter_block2d_bil_var_mmx
(
  const unsigned char *ref_ptr,
  int ref_pixels_per_line,
  const unsigned char *src_ptr,
  int src_pixels_per_line,
  unsigned int Height,
  const short *HFilter,
  const short *VFilter,
  int *sum,
  unsigned int *sumsquared
);


unsigned int vp9_variance4x4_mmx(
  const unsigned char *src_ptr,
  int  source_stride,
  const unsigned char *ref_ptr,
  int  recon_stride,
  unsigned int *sse) {
  unsigned int var;
  int avg;

  vp9_get4x4var_mmx(src_ptr, source_stride, ref_ptr, recon_stride, &var, &avg);
  *sse = var;
  return (var - (((unsigned int)avg * avg) >> 4));

}

unsigned int vp9_variance8x8_mmx(
  const unsigned char *src_ptr,
  int  source_stride,
  const unsigned char *ref_ptr,
  int  recon_stride,
  unsigned int *sse) {
  unsigned int var;
  int avg;

  vp9_get8x8var_mmx(src_ptr, source_stride, ref_ptr, recon_stride, &var, &avg);
  *sse = var;

  return (var - (((unsigned int)avg * avg) >> 6));

}

unsigned int vp9_mse16x16_mmx(
  const unsigned char *src_ptr,
  int  source_stride,
  const unsigned char *ref_ptr,
  int  recon_stride,
  unsigned int *sse) {
  unsigned int sse0, sse1, sse2, sse3, var;
  int sum0, sum1, sum2, sum3;


  vp9_get8x8var_mmx(src_ptr, source_stride, ref_ptr, recon_stride, &sse0, &sum0);
  vp9_get8x8var_mmx(src_ptr + 8, source_stride, ref_ptr + 8, recon_stride, &sse1, &sum1);
  vp9_get8x8var_mmx(src_ptr + 8 * source_stride, source_stride, ref_ptr + 8 * recon_stride, recon_stride, &sse2, &sum2);
  vp9_get8x8var_mmx(src_ptr + 8 * source_stride + 8, source_stride, ref_ptr + 8 * recon_stride + 8, recon_stride, &sse3, &sum3);

  var = sse0 + sse1 + sse2 + sse3;
  *sse = var;
  return var;
}


unsigned int vp9_variance16x16_mmx(
  const unsigned char *src_ptr,
  int  source_stride,
  const unsigned char *ref_ptr,
  int  recon_stride,
  unsigned int *sse) {
  unsigned int sse0, sse1, sse2, sse3, var;
  int sum0, sum1, sum2, sum3, avg;


  vp9_get8x8var_mmx(src_ptr, source_stride, ref_ptr, recon_stride, &sse0, &sum0);
  vp9_get8x8var_mmx(src_ptr + 8, source_stride, ref_ptr + 8, recon_stride, &sse1, &sum1);
  vp9_get8x8var_mmx(src_ptr + 8 * source_stride, source_stride, ref_ptr + 8 * recon_stride, recon_stride, &sse2, &sum2);
  vp9_get8x8var_mmx(src_ptr + 8 * source_stride + 8, source_stride, ref_ptr + 8 * recon_stride + 8, recon_stride, &sse3, &sum3);

  var = sse0 + sse1 + sse2 + sse3;
  avg = sum0 + sum1 + sum2 + sum3;
  *sse = var;
  return (var - (((unsigned int)avg * avg) >> 8));
}

unsigned int vp9_variance16x8_mmx(
  const unsigned char *src_ptr,
  int  source_stride,
  const unsigned char *ref_ptr,
  int  recon_stride,
  unsigned int *sse) {
  unsigned int sse0, sse1, var;
  int sum0, sum1, avg;

  vp9_get8x8var_mmx(src_ptr, source_stride, ref_ptr, recon_stride, &sse0, &sum0);
  vp9_get8x8var_mmx(src_ptr + 8, source_stride, ref_ptr + 8, recon_stride, &sse1, &sum1);

  var = sse0 + sse1;
  avg = sum0 + sum1;
  *sse = var;
  return (var - (((unsigned int)avg * avg) >> 7));

}


unsigned int vp9_variance8x16_mmx(
  const unsigned char *src_ptr,
  int  source_stride,
  const unsigned char *ref_ptr,
  int  recon_stride,
  unsigned int *sse) {
  unsigned int sse0, sse1, var;
  int sum0, sum1, avg;

  vp9_get8x8var_mmx(src_ptr, source_stride, ref_ptr, recon_stride, &sse0, &sum0);
  vp9_get8x8var_mmx(src_ptr + 8 * source_stride, source_stride, ref_ptr + 8 * recon_stride, recon_stride, &sse1, &sum1);

  var = sse0 + sse1;
  avg = sum0 + sum1;
  *sse = var;

  return (var - (((unsigned int)avg * avg) >> 7));

}

DECLARE_ALIGNED(16, extern const short, vp9_bilinear_filters_mmx[16][8]);

unsigned int vp9_sub_pixel_variance4x4_mmx
(
  const unsigned char  *src_ptr,
  int  src_pixels_per_line,
  int  xoffset,
  int  yoffset,
  const unsigned char *dst_ptr,
  int dst_pixels_per_line,
  unsigned int *sse)

{
  int xsum;
  unsigned int xxsum;
  vp9_filter_block2d_bil4x4_var_mmx(
    src_ptr, src_pixels_per_line,
    dst_ptr, dst_pixels_per_line,
    vp9_bilinear_filters_mmx[xoffset], vp9_bilinear_filters_mmx[yoffset],
    &xsum, &xxsum
  );
  *sse = xxsum;
  return (xxsum - (((unsigned int)xsum * xsum) >> 4));
}


unsigned int vp9_sub_pixel_variance8x8_mmx
(
  const unsigned char  *src_ptr,
  int  src_pixels_per_line,
  int  xoffset,
  int  yoffset,
  const unsigned char *dst_ptr,
  int dst_pixels_per_line,
  unsigned int *sse
) {

  int xsum;
  unsigned int xxsum;
  vp9_filter_block2d_bil_var_mmx(
    src_ptr, src_pixels_per_line,
    dst_ptr, dst_pixels_per_line, 8,
    vp9_bilinear_filters_mmx[xoffset], vp9_bilinear_filters_mmx[yoffset],
    &xsum, &xxsum
  );
  *sse = xxsum;
  return (xxsum - (((unsigned int)xsum * xsum) >> 6));
}

unsigned int vp9_sub_pixel_variance16x16_mmx
(
  const unsigned char  *src_ptr,
  int  src_pixels_per_line,
  int  xoffset,
  int  yoffset,
  const unsigned char *dst_ptr,
  int dst_pixels_per_line,
  unsigned int *sse
) {

  int xsum0, xsum1;
  unsigned int xxsum0, xxsum1;

  vp9_filter_block2d_bil_var_mmx(
    src_ptr, src_pixels_per_line,
    dst_ptr, dst_pixels_per_line, 16,
    vp9_bilinear_filters_mmx[xoffset], vp9_bilinear_filters_mmx[yoffset],
    &xsum0, &xxsum0
  );

  vp9_filter_block2d_bil_var_mmx(
    src_ptr + 8, src_pixels_per_line,
    dst_ptr + 8, dst_pixels_per_line, 16,
    vp9_bilinear_filters_mmx[xoffset], vp9_bilinear_filters_mmx[yoffset],
    &xsum1, &xxsum1
  );

  xsum0 += xsum1;
  xxsum0 += xxsum1;

  *sse = xxsum0;
  return (xxsum0 - (((unsigned int)xsum0 * xsum0) >> 8));


}

unsigned int vp9_sub_pixel_mse16x16_mmx(
  const unsigned char  *src_ptr,
  int  src_pixels_per_line,
  int  xoffset,
  int  yoffset,
  const unsigned char *dst_ptr,
  int dst_pixels_per_line,
  unsigned int *sse
) {
  vp9_sub_pixel_variance16x16_mmx(src_ptr, src_pixels_per_line, xoffset, yoffset, dst_ptr, dst_pixels_per_line, sse);
  return *sse;
}

unsigned int vp9_sub_pixel_variance16x8_mmx
(
  const unsigned char  *src_ptr,
  int  src_pixels_per_line,
  int  xoffset,
  int  yoffset,
  const unsigned char *dst_ptr,
  int dst_pixels_per_line,
  unsigned int *sse
) {
  int xsum0, xsum1;
  unsigned int xxsum0, xxsum1;


  vp9_filter_block2d_bil_var_mmx(
    src_ptr, src_pixels_per_line,
    dst_ptr, dst_pixels_per_line, 8,
    vp9_bilinear_filters_mmx[xoffset], vp9_bilinear_filters_mmx[yoffset],
    &xsum0, &xxsum0
  );


  vp9_filter_block2d_bil_var_mmx(
    src_ptr + 8, src_pixels_per_line,
    dst_ptr + 8, dst_pixels_per_line, 8,
    vp9_bilinear_filters_mmx[xoffset], vp9_bilinear_filters_mmx[yoffset],
    &xsum1, &xxsum1
  );

  xsum0 += xsum1;
  xxsum0 += xxsum1;

  *sse = xxsum0;
  return (xxsum0 - (((unsigned int)xsum0 * xsum0) >> 7));
}

unsigned int vp9_sub_pixel_variance8x16_mmx
(
  const unsigned char  *src_ptr,
  int  src_pixels_per_line,
  int  xoffset,
  int  yoffset,
  const unsigned char *dst_ptr,
  int dst_pixels_per_line,
  unsigned int *sse
) {
  int xsum;
  unsigned int xxsum;
  vp9_filter_block2d_bil_var_mmx(
    src_ptr, src_pixels_per_line,
    dst_ptr, dst_pixels_per_line, 16,
    vp9_bilinear_filters_mmx[xoffset], vp9_bilinear_filters_mmx[yoffset],
    &xsum, &xxsum
  );
  *sse = xxsum;
  return (xxsum - (((unsigned int)xsum * xsum) >> 7));
}


unsigned int vp9_variance_halfpixvar16x16_h_mmx(
  const unsigned char *src_ptr,
  int  source_stride,
  const unsigned char *ref_ptr,
  int  recon_stride,
  unsigned int *sse) {
  return vp9_sub_pixel_variance16x16_mmx(src_ptr, source_stride, 8, 0,
                                         ref_ptr, recon_stride, sse);
}


unsigned int vp9_variance_halfpixvar16x16_v_mmx(
  const unsigned char *src_ptr,
  int  source_stride,
  const unsigned char *ref_ptr,
  int  recon_stride,
  unsigned int *sse) {
  return vp9_sub_pixel_variance16x16_mmx(src_ptr, source_stride, 0, 8,
                                         ref_ptr, recon_stride, sse);
}


unsigned int vp9_variance_halfpixvar16x16_hv_mmx(
  const unsigned char *src_ptr,
  int  source_stride,
  const unsigned char *ref_ptr,
  int  recon_stride,
  unsigned int *sse) {
  return vp9_sub_pixel_variance16x16_mmx(src_ptr, source_stride, 8, 8,
                                         ref_ptr, recon_stride, sse);
}