/*
 *  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 "./vp8_rtcd.h"
#include "vpx_config.h"
#include "vp8/common/variance.h"
#include "vpx_ports/mem.h"
#include "vp8/common/x86/filter_x86.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 *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 *filter
);

extern void vp8_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 vp8_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 vp8_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;
    vp8_filter_block2d_bil4x4_var_mmx(
        src_ptr, src_pixels_per_line,
        dst_ptr, dst_pixels_per_line,
        vp8_bilinear_filters_x86_4[xoffset], vp8_bilinear_filters_x86_4[yoffset],
        &xsum, &xxsum
    );
    *sse = xxsum;
    return (xxsum - (((unsigned int)xsum * xsum) >> 4));
}


unsigned int vp8_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;
    vp8_filter_block2d_bil_var_mmx(
        src_ptr, src_pixels_per_line,
        dst_ptr, dst_pixels_per_line, 8,
        vp8_bilinear_filters_x86_4[xoffset], vp8_bilinear_filters_x86_4[yoffset],
        &xsum, &xxsum
    );
    *sse = xxsum;
    return (xxsum - (((unsigned int)xsum * xsum) >> 6));
}

unsigned int vp8_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;


    vp8_filter_block2d_bil_var_mmx(
        src_ptr, src_pixels_per_line,
        dst_ptr, dst_pixels_per_line, 16,
        vp8_bilinear_filters_x86_4[xoffset], vp8_bilinear_filters_x86_4[yoffset],
        &xsum0, &xxsum0
    );


    vp8_filter_block2d_bil_var_mmx(
        src_ptr + 8, src_pixels_per_line,
        dst_ptr + 8, dst_pixels_per_line, 16,
        vp8_bilinear_filters_x86_4[xoffset], vp8_bilinear_filters_x86_4[yoffset],
        &xsum1, &xxsum1
    );

    xsum0 += xsum1;
    xxsum0 += xxsum1;

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


}

unsigned int vp8_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;


    vp8_filter_block2d_bil_var_mmx(
        src_ptr, src_pixels_per_line,
        dst_ptr, dst_pixels_per_line, 8,
        vp8_bilinear_filters_x86_4[xoffset], vp8_bilinear_filters_x86_4[yoffset],
        &xsum0, &xxsum0
    );


    vp8_filter_block2d_bil_var_mmx(
        src_ptr + 8, src_pixels_per_line,
        dst_ptr + 8, dst_pixels_per_line, 8,
        vp8_bilinear_filters_x86_4[xoffset], vp8_bilinear_filters_x86_4[yoffset],
        &xsum1, &xxsum1
    );

    xsum0 += xsum1;
    xxsum0 += xxsum1;

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

unsigned int vp8_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;
    vp8_filter_block2d_bil_var_mmx(
        src_ptr, src_pixels_per_line,
        dst_ptr, dst_pixels_per_line, 16,
        vp8_bilinear_filters_x86_4[xoffset], vp8_bilinear_filters_x86_4[yoffset],
        &xsum, &xxsum
    );
    *sse = xxsum;
    return (xxsum - (((unsigned int)xsum * xsum) >> 7));
}


unsigned int vp8_variance_halfpixvar16x16_h_mmx(
    const unsigned char *src_ptr,
    int  source_stride,
    const unsigned char *ref_ptr,
    int  recon_stride,
    unsigned int *sse)
{
    return vp8_sub_pixel_variance16x16_mmx(src_ptr, source_stride, 4, 0,
                                           ref_ptr, recon_stride, sse);
}


unsigned int vp8_variance_halfpixvar16x16_v_mmx(
    const unsigned char *src_ptr,
    int  source_stride,
    const unsigned char *ref_ptr,
    int  recon_stride,
    unsigned int *sse)
{
    return vp8_sub_pixel_variance16x16_mmx(src_ptr, source_stride, 0, 4,
                                           ref_ptr, recon_stride, sse);
}


unsigned int vp8_variance_halfpixvar16x16_hv_mmx(
    const unsigned char *src_ptr,
    int  source_stride,
    const unsigned char *ref_ptr,
    int  recon_stride,
    unsigned int *sse)
{
    return vp8_sub_pixel_variance16x16_mmx(src_ptr, source_stride, 4, 4,
                                           ref_ptr, recon_stride, sse);
}