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/*
* Copyright (c) 2010 The VP8 project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license and patent
* grant that can be found in the LICENSE file in the root of the source
* tree. All contributing project authors may be found in the AUTHORS
* file in the root of the source tree.
*/
#include "vpx_ports/config.h"
#include <math.h>
#include "subpixel.h"
#include "vpx_ports/mem.h"
#define BLOCK_HEIGHT_WIDTH 4
#define VP8_FILTER_WEIGHT 128
#define VP8_FILTER_SHIFT 7
DECLARE_ALIGNED(16, static const short, sub_pel_filters[8][6]) =
{
{ 0, 0, 128, 0, 0, 0 }, // note that 1/8 pel positions are just as per alpha -0.5 bicubic
{ 0, -6, 123, 12, -1, 0 },
{ 2, -11, 108, 36, -8, 1 }, // New 1/4 pel 6 tap filter
{ 0, -9, 93, 50, -6, 0 },
{ 3, -16, 77, 77, -16, 3 }, // New 1/2 pel 6 tap filter
{ 0, -6, 50, 93, -9, 0 },
{ 1, -8, 36, 108, -11, 2 }, // New 1/4 pel 6 tap filter
{ 0, -1, 12, 123, -6, 0 },
};
extern void vp8_filter_block2d_first_pass_armv6
(
unsigned char *src_ptr,
short *output_ptr,
unsigned int src_pixels_per_line,
unsigned int output_width,
unsigned int output_height,
const short *vp8_filter
);
extern void vp8_filter_block2d_second_pass_armv6
(
short *src_ptr,
unsigned char *output_ptr,
unsigned int output_pitch,
unsigned int cnt,
const short *vp8_filter
);
extern void vp8_filter_block2d_first_pass_only_armv6
(
unsigned char *src_ptr,
unsigned char *output_ptr,
unsigned int src_pixels_per_line,
unsigned int cnt,
unsigned int output_pitch,
const short *vp8_filter
);
extern void vp8_filter_block2d_second_pass_only_armv6
(
unsigned char *src_ptr,
unsigned char *output_ptr,
unsigned int src_pixels_per_line,
unsigned int cnt,
unsigned int output_pitch,
const short *vp8_filter
);
#if HAVE_ARMV6
void vp8_sixtap_predict_armv6
(
unsigned char *src_ptr,
int src_pixels_per_line,
int xoffset,
int yoffset,
unsigned char *dst_ptr,
int dst_pitch
)
{
const short *HFilter;
const short *VFilter;
DECLARE_ALIGNED_ARRAY(4, short, FData, 12*4); // Temp data bufffer used in filtering
HFilter = sub_pel_filters[xoffset]; // 6 tap
VFilter = sub_pel_filters[yoffset]; // 6 tap
// Vfilter is null. First pass only
if (xoffset && !yoffset)
{
//vp8_filter_block2d_first_pass_armv6 ( src_ptr, FData+2, src_pixels_per_line, 4, 4, HFilter );
//vp8_filter_block2d_second_pass_armv6 ( FData+2, dst_ptr, dst_pitch, 4, VFilter );
vp8_filter_block2d_first_pass_only_armv6(src_ptr, dst_ptr, src_pixels_per_line, 4, dst_pitch, HFilter);
}
// Hfilter is null. Second pass only
else if (!xoffset && yoffset)
{
vp8_filter_block2d_second_pass_only_armv6(src_ptr, dst_ptr, src_pixels_per_line, 4, dst_pitch, VFilter);
}
else
{
// Vfilter is a 4 tap filter
if (yoffset & 0x1)
vp8_filter_block2d_first_pass_armv6(src_ptr - src_pixels_per_line, FData + 1, src_pixels_per_line, 4, 7, HFilter);
// Vfilter is 6 tap filter
else
vp8_filter_block2d_first_pass_armv6(src_ptr - (2 * src_pixels_per_line), FData, src_pixels_per_line, 4, 9, HFilter);
vp8_filter_block2d_second_pass_armv6(FData + 2, dst_ptr, dst_pitch, 4, VFilter);
}
}
/*
void vp8_sixtap_predict8x4_armv6
(
unsigned char *src_ptr,
int src_pixels_per_line,
int xoffset,
int yoffset,
unsigned char *dst_ptr,
int dst_pitch
)
{
const short *HFilter;
const short *VFilter;
DECLARE_ALIGNED_ARRAY(4, short, FData, 16*8); // Temp data bufffer used in filtering
HFilter = sub_pel_filters[xoffset]; // 6 tap
VFilter = sub_pel_filters[yoffset]; // 6 tap
// if (xoffset && !yoffset)
// {
// vp8_filter_block2d_first_pass_only_armv6 ( src_ptr, dst_ptr, src_pixels_per_line, 8, dst_pitch, HFilter );
// }
// Hfilter is null. Second pass only
// else if (!xoffset && yoffset)
// {
// vp8_filter_block2d_second_pass_only_armv6 ( src_ptr, dst_ptr, src_pixels_per_line, 8, dst_pitch, VFilter );
// }
// else
// {
// if (yoffset & 0x1)
// vp8_filter_block2d_first_pass_armv6 ( src_ptr-src_pixels_per_line, FData+1, src_pixels_per_line, 8, 7, HFilter );
// else
vp8_filter_block2d_first_pass_armv6 ( src_ptr-(2*src_pixels_per_line), FData, src_pixels_per_line, 8, 9, HFilter );
vp8_filter_block2d_second_pass_armv6 ( FData+2, dst_ptr, dst_pitch, 4, 8, VFilter );
// }
}
*/
void vp8_sixtap_predict8x8_armv6
(
unsigned char *src_ptr,
int src_pixels_per_line,
int xoffset,
int yoffset,
unsigned char *dst_ptr,
int dst_pitch
)
{
const short *HFilter;
const short *VFilter;
DECLARE_ALIGNED_ARRAY(4, short, FData, 16*8); // Temp data bufffer used in filtering
HFilter = sub_pel_filters[xoffset]; // 6 tap
VFilter = sub_pel_filters[yoffset]; // 6 tap
if (xoffset && !yoffset)
{
vp8_filter_block2d_first_pass_only_armv6(src_ptr, dst_ptr, src_pixels_per_line, 8, dst_pitch, HFilter);
}
// Hfilter is null. Second pass only
else if (!xoffset && yoffset)
{
vp8_filter_block2d_second_pass_only_armv6(src_ptr, dst_ptr, src_pixels_per_line, 8, dst_pitch, VFilter);
}
else
{
if (yoffset & 0x1)
vp8_filter_block2d_first_pass_armv6(src_ptr - src_pixels_per_line, FData + 1, src_pixels_per_line, 8, 11, HFilter);
else
vp8_filter_block2d_first_pass_armv6(src_ptr - (2 * src_pixels_per_line), FData, src_pixels_per_line, 8, 13, HFilter);
vp8_filter_block2d_second_pass_armv6(FData + 2, dst_ptr, dst_pitch, 8, VFilter);
}
}
void vp8_sixtap_predict16x16_armv6
(
unsigned char *src_ptr,
int src_pixels_per_line,
int xoffset,
int yoffset,
unsigned char *dst_ptr,
int dst_pitch
)
{
const short *HFilter;
const short *VFilter;
DECLARE_ALIGNED_ARRAY(4, short, FData, 24*16); // Temp data bufffer used in filtering
HFilter = sub_pel_filters[xoffset]; // 6 tap
VFilter = sub_pel_filters[yoffset]; // 6 tap
if (xoffset && !yoffset)
{
vp8_filter_block2d_first_pass_only_armv6(src_ptr, dst_ptr, src_pixels_per_line, 16, dst_pitch, HFilter);
}
// Hfilter is null. Second pass only
else if (!xoffset && yoffset)
{
vp8_filter_block2d_second_pass_only_armv6(src_ptr, dst_ptr, src_pixels_per_line, 16, dst_pitch, VFilter);
}
else
{
if (yoffset & 0x1)
vp8_filter_block2d_first_pass_armv6(src_ptr - src_pixels_per_line, FData + 1, src_pixels_per_line, 16, 19, HFilter);
else
vp8_filter_block2d_first_pass_armv6(src_ptr - (2 * src_pixels_per_line), FData, src_pixels_per_line, 16, 21, HFilter);
vp8_filter_block2d_second_pass_armv6(FData + 2, dst_ptr, dst_pitch, 16, VFilter);
}
}
#endif
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