ref: dce0896249b9d3eebb52522beeebba00eface3b8
dir: /vp8/common/filter.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 <stdlib.h>
#include "filter.h"
#include "vpx_ports/mem.h"
DECLARE_ALIGNED(16, const short, vp8_bilinear_filters[SUBPEL_SHIFTS][2]) = {
#if SUBPEL_SHIFTS==16
{ 128, 0 },
{ 120, 8 },
{ 112, 16 },
{ 104, 24 },
{ 96, 32 },
{ 88, 40 },
{ 80, 48 },
{ 72, 56 },
{ 64, 64 },
{ 56, 72 },
{ 48, 80 },
{ 40, 88 },
{ 32, 96 },
{ 24, 104 },
{ 16, 112 },
{ 8, 120 }
#else
{ 128, 0 },
{ 112, 16 },
{ 96, 32 },
{ 80, 48 },
{ 64, 64 },
{ 48, 80 },
{ 32, 96 },
{ 16, 112 }
#endif /* SUBPEL_SHIFTS==16 */
};
#define FILTER_ALPHA 0
#define FILTER_ALPHA_SHARP 1
DECLARE_ALIGNED(16, const short, vp8_sub_pel_filters_8[SUBPEL_SHIFTS][8]) = {
#if SUBPEL_SHIFTS==16
#if FILTER_ALPHA == 0
/* Lagrangian interpolation filter */
{ 0, 0, 0, 128, 0, 0, 0, 0},
{ 0, 1, -5, 126, 8, -3, 1, 0},
{ -1, 3, -10, 122, 18, -6, 2, 0},
{ -1, 4, -13, 118, 27, -9, 3, -1},
{ -1, 4, -16, 112, 37, -11, 4, -1},
{ -1, 5, -18, 105, 48, -14, 4, -1},
{ -1, 5, -19, 97, 58, -16, 5, -1},
{ -1, 6, -19, 88, 68, -18, 5, -1},
{ -1, 6, -19, 78, 78, -19, 6, -1},
{ -1, 5, -18, 68, 88, -19, 6, -1},
{ -1, 5, -16, 58, 97, -19, 5, -1},
{ -1, 4, -14, 48, 105, -18, 5, -1},
{ -1, 4, -11, 37, 112, -16, 4, -1},
{ -1, 3, -9, 27, 118, -13, 4, -1},
{ 0, 2, -6, 18, 122, -10, 3, -1},
{ 0, 1, -3, 8, 126, -5, 1, 0}
#elif FILTER_ALPHA == 50
/* Generated using MATLAB:
* alpha = 0.5;
* b=intfilt(8,4,alpha);
* bi=round(128*b);
* ba=flipud(reshape([bi 0], 8, 8));
* disp(num2str(ba, '%d,'))
*/
{ 0, 0, 0, 128, 0, 0, 0, 0},
{ 0, 1, -5, 126, 8, -3, 1, 0},
{ 0, 2, -10, 122, 18, -6, 2, 0},
{ -1, 3, -13, 118, 27, -9, 3, 0},
{ -1, 4, -16, 112, 37, -11, 3, 0},
{ -1, 5, -17, 104, 48, -14, 4, -1},
{ -1, 5, -18, 96, 58, -16, 5, -1},
{ -1, 5, -19, 88, 68, -17, 5, -1},
{ -1, 5, -18, 78, 78, -18, 5, -1},
{ -1, 5, -17, 68, 88, -19, 5, -1},
{ -1, 5, -16, 58, 96, -18, 5, -1},
{ -1, 4, -14, 48, 104, -17, 5, -1},
{ 0, 3, -11, 37, 112, -16, 4, -1},
{ 0, 3, -9, 27, 118, -13, 3, -1},
{ 0, 2, -6, 18, 122, -10, 2, 0},
{ 0, 1, -3, 8, 126, -5, 1, 0}
#endif /* FILTER_ALPHA */
#else /* SUBPEL_SHIFTS==16 */
#if FILTER_ALPHA == 0
{ 0, 0, 0, 128, 0, 0, 0, 0},
{ -1, 3, -10, 122, 18, -6, 2, 0},
{ -1, 4, -16, 112, 37, -11, 4, -1},
{ -1, 5, -19, 97, 58, -16, 5, -1},
{ -1, 6, -19, 78, 78, -19, 6, -1},
{ -1, 5, -16, 58, 97, -19, 5, -1},
{ -1, 4, -11, 37, 112, -16, 4, -1},
{ 0, 2, -6, 18, 122, -10, 3, -1},
#elif FILTER_ALPHA == 50
/* alpha = 0.50 */
{ 0, 0, 0, 128, 0, 0, 0, 0},
{ 0, 2, -10, 122, 18, -6, 2, 0},
{ -1, 4, -16, 112, 37, -11, 3, 0},
{ -1, 5, -18, 96, 58, -16, 5, -1},
{ -1, 5, -18, 78, 78, -18, 5, -1},
{ -1, 5, -16, 58, 96, -18, 5, -1},
{ 0, 3, -11, 37, 112, -16, 4, -1},
{ 0, 2, -6, 18, 122, -10, 2, 0}
#endif /* FILTER_ALPHA */
#endif /* SUBPEL_SHIFTS==16 */
};
DECLARE_ALIGNED(16, const short, vp8_sub_pel_filters_8s[SUBPEL_SHIFTS][8]) = {
#if SUBPEL_SHIFTS==16
#if FILTER_ALPHA_SHARP == 1
/* dct based filter */
{0, 0, 0, 128, 0, 0, 0, 0},
{-1, 3, -7, 127, 8, -3, 1, 0},
{-2, 5, -13, 125, 17, -6, 3, -1},
{-3, 7, -17, 121, 27, -10, 5, -2},
{-4, 9, -20, 115, 37, -13, 6, -2},
{-4, 10, -23, 108, 48, -16, 8, -3},
{-4, 10, -24, 100, 59, -19, 9, -3},
{-4, 11, -24, 90, 70, -21, 10, -4},
{-4, 11, -23, 80, 80, -23, 11, -4},
{-4, 10, -21, 70, 90, -24, 11, -4},
{-3, 9, -19, 59, 100, -24, 10, -4},
{-3, 8, -16, 48, 108, -23, 10, -4},
{-2, 6, -13, 37, 115, -20, 9, -4},
{-2, 5, -10, 27, 121, -17, 7, -3},
{-1, 3, -6, 17, 125, -13, 5, -2},
{0, 1, -3, 8, 127, -7, 3, -1}
#elif FILTER_ALPHA_SHARP == 75
/* alpha = 0.75 */
{0, 0, 0, 128, 0, 0, 0, 0},
{-1, 2, -6, 126, 9, -3, 2, -1},
{-1, 4, -11, 123, 18, -7, 3, -1},
{-2, 6, -16, 119, 28, -10, 5, -2},
{-2, 7, -19, 113, 38, -13, 6, -2},
{-3, 8, -21, 106, 49, -16, 7, -2},
{-3, 9, -22, 99, 59, -19, 8, -3},
{-3, 9, -23, 90, 70, -21, 9, -3},
{-3, 9, -22, 80, 80, -22, 9, -3},
{-3, 9, -21, 70, 90, -23, 9, -3},
{-3, 8, -19, 59, 99, -22, 9, -3},
{-2, 7, -16, 49, 106, -21, 8, -3},
{-2, 6, -13, 38, 113, -19, 7, -2},
{-2, 5, -10, 28, 119, -16, 6, -2},
{-1, 3, -7, 18, 123, -11, 4, -1},
{-1, 2, -3, 9, 126, -6, 2, -1}
#elif FILTER_ALPHA_SHARP == 65
/* alpha = 0.65 */
{ 0, 0, 0, 128, 0, 0, 0, 0},
{ 0, 2, -6, 126, 8, -3, 1, 0},
{ -1, 3, -10, 123, 18, -6, 2, -1},
{ -1, 5, -14, 118, 27, -10, 4, -1},
{ -1, 5, -17, 112, 38, -13, 5, -1},
{ -2, 6, -19, 106, 48, -15, 5, -1},
{ -2, 7, -21, 98, 59, -17, 6, -2},
{ -2, 7, -21, 89, 69, -19, 7, -2},
{ -2, 7, -20, 79, 79, -20, 7, -2},
{ -2, 7, -19, 69, 89, -21, 7, -2},
{ -2, 6, -17, 59, 98, -21, 7, -2},
{ -1, 5, -15, 48, 106, -19, 6, -2},
{ -1, 5, -13, 38, 112, -17, 5, -1},
{ -1, 4, -10, 27, 118, -14, 5, -1},
{ -1, 2, -6, 18, 123, -10, 3, -1},
{ 0, 1, -3, 8, 126, -6, 2, 0}
#endif /* FILTER_ALPHA_SHARP */
#else /* SUBPEL_SHIFTS==16 */
#if FILTER_ALPHA_SHARP == 1
/* dct based filter */
{0, 0, 0, 128, 0, 0, 0, 0},
{-2, 5, -13, 125, 17, -6, 3, -1},
{-4, 9, -20, 115, 37, -13, 6, -2},
{-4, 10, -24, 100, 59, -19, 9, -3},
{-4, 10, -23, 81, 81, -23, 10, -4},
{-3, 9, -19, 59, 100, -24, 10, -4},
{-2, 6, -13, 37, 115, -20, 9, -4},
{-1, 3, -6, 17, 125, -13, 5, -2}
#elif FILTER_ALPHA_SHARP == 75
/* alpha = 0.75 */
{0, 0, 0, 128, 0, 0, 0, 0},
{-1, 4, -11, 123, 18, -7, 3, -1},
{-2, 7, -19, 113, 38, -13, 6, -2},
{-3, 9, -22, 99, 59, -19, 8, -3},
{-3, 9, -22, 80, 80, -22, 9, -3},
{-3, 8, -19, 59, 99, -22, 9, -3},
{-2, 6, -13, 38, 113, -19, 7, -2},
{-1, 3, -7, 18, 123, -11, 4, -1}
#elif FILTER_ALPHA_SHARP == 65
/* alpha = 0.65 */
{ 0, 0, 0, 128, 0, 0, 0, 0},
{ -1, 3, -10, 123, 18, -6, 2, -1},
{ -1, 5, -17, 112, 38, -13, 5, -1},
{ -2, 7, -21, 98, 59, -17, 6, -2},
{ -2, 7, -20, 79, 79, -20, 7, -2},
{ -2, 6, -17, 59, 98, -21, 7, -2},
{ -1, 5, -13, 38, 112, -17, 5, -1},
{ -1, 2, -6, 18, 123, -10, 3, -1}
#endif /* FILTER_ALPHA_SHARP */
#endif /* SUBPEL_SHIFTS==16 */
};
DECLARE_ALIGNED(16, const short, vp8_sub_pel_filters_6[SUBPEL_SHIFTS][6]) = {
#if SUBPEL_SHIFTS==16
{0, 0, 128, 0, 0, 0},
{1, -5, 125, 8, -2, 1},
{1, -8, 122, 17, -5, 1},
{2, -11, 116, 27, -8, 2},
{3, -14, 110, 37, -10, 2},
{3, -15, 103, 47, -12, 2},
{3, -16, 95, 57, -14, 3},
{3, -16, 86, 67, -15, 3},
{3, -16, 77, 77, -16, 3},
{3, -15, 67, 86, -16, 3},
{3, -14, 57, 95, -16, 3},
{2, -12, 47, 103, -15, 3},
{2, -10, 37, 110, -14, 3},
{2, -8, 27, 116, -11, 2},
{1, -5, 17, 122, -8, 1},
{1, -2, 8, 125, -5, 1}
#else
{ 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 },
#endif /* SUBPEL_SHIFTS==16 */
};
static void filter_block2d_first_pass_6
(
unsigned char *src_ptr,
int *output_ptr,
unsigned int src_pixels_per_line,
unsigned int pixel_step,
unsigned int output_height,
unsigned int output_width,
const short *vp8_filter
) {
unsigned int i, j;
int Temp;
for (i = 0; i < output_height; i++) {
for (j = 0; j < output_width; j++) {
Temp = ((int)src_ptr[-2 * (int)pixel_step] * vp8_filter[0]) +
((int)src_ptr[-1 * (int)pixel_step] * vp8_filter[1]) +
((int)src_ptr[0] * vp8_filter[2]) +
((int)src_ptr[pixel_step] * vp8_filter[3]) +
((int)src_ptr[2 * pixel_step] * vp8_filter[4]) +
((int)src_ptr[3 * pixel_step] * vp8_filter[5]) +
(VP8_FILTER_WEIGHT >> 1); /* Rounding */
/* Normalize back to 0-255 */
Temp = Temp >> VP8_FILTER_SHIFT;
if (Temp < 0)
Temp = 0;
else if (Temp > 255)
Temp = 255;
output_ptr[j] = Temp;
src_ptr++;
}
/* Next row... */
src_ptr += src_pixels_per_line - output_width;
output_ptr += output_width;
}
}
static void filter_block2d_second_pass_6
(
int *src_ptr,
unsigned char *output_ptr,
int output_pitch,
unsigned int src_pixels_per_line,
unsigned int pixel_step,
unsigned int output_height,
unsigned int output_width,
const short *vp8_filter
) {
unsigned int i, j;
int Temp;
for (i = 0; i < output_height; i++) {
for (j = 0; j < output_width; j++) {
/* Apply filter */
Temp = ((int)src_ptr[-2 * (int)pixel_step] * vp8_filter[0]) +
((int)src_ptr[-1 * (int)pixel_step] * vp8_filter[1]) +
((int)src_ptr[0] * vp8_filter[2]) +
((int)src_ptr[pixel_step] * vp8_filter[3]) +
((int)src_ptr[2 * pixel_step] * vp8_filter[4]) +
((int)src_ptr[3 * pixel_step] * vp8_filter[5]) +
(VP8_FILTER_WEIGHT >> 1); /* Rounding */
/* Normalize back to 0-255 */
Temp = Temp >> VP8_FILTER_SHIFT;
if (Temp < 0)
Temp = 0;
else if (Temp > 255)
Temp = 255;
output_ptr[j] = (unsigned char)Temp;
src_ptr++;
}
/* Start next row */
src_ptr += src_pixels_per_line - output_width;
output_ptr += output_pitch;
}
}
/*
* The only functional difference between filter_block2d_second_pass()
* and this function is that filter_block2d_second_pass() does a sixtap
* filter on the input and stores it in the output. This function
* (filter_block2d_second_pass_avg()) does a sixtap filter on the input,
* and then averages that with the content already present in the output
* ((filter_result + dest + 1) >> 1) and stores that in the output.
*/
static void filter_block2d_second_pass_avg_6
(
int *src_ptr,
unsigned char *output_ptr,
int output_pitch,
unsigned int src_pixels_per_line,
unsigned int pixel_step,
unsigned int output_height,
unsigned int output_width,
const short *vp8_filter
) {
unsigned int i, j;
int Temp;
for (i = 0; i < output_height; i++) {
for (j = 0; j < output_width; j++) {
/* Apply filter */
Temp = ((int)src_ptr[-2 * (int)pixel_step] * vp8_filter[0]) +
((int)src_ptr[-1 * (int)pixel_step] * vp8_filter[1]) +
((int)src_ptr[0] * vp8_filter[2]) +
((int)src_ptr[pixel_step] * vp8_filter[3]) +
((int)src_ptr[2 * pixel_step] * vp8_filter[4]) +
((int)src_ptr[3 * pixel_step] * vp8_filter[5]) +
(VP8_FILTER_WEIGHT >> 1); /* Rounding */
/* Normalize back to 0-255 */
Temp = Temp >> VP8_FILTER_SHIFT;
if (Temp < 0)
Temp = 0;
else if (Temp > 255)
Temp = 255;
output_ptr[j] = (unsigned char)((output_ptr[j] + Temp + 1) >> 1);
src_ptr++;
}
/* Start next row */
src_ptr += src_pixels_per_line - output_width;
output_ptr += output_pitch;
}
}
#define Interp_Extend 3
static void filter_block2d_6
(
unsigned char *src_ptr,
unsigned char *output_ptr,
unsigned int src_pixels_per_line,
int output_pitch,
const short *HFilter,
const short *VFilter
) {
int FData[(3 + Interp_Extend * 2) * 4]; /* Temp data buffer used in filtering */
/* First filter 1-D horizontally... */
filter_block2d_first_pass_6(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line), FData, src_pixels_per_line, 1,
3 + Interp_Extend * 2, 4, HFilter);
/* then filter verticaly... */
filter_block2d_second_pass_6(FData + 4 * (Interp_Extend - 1), output_ptr, output_pitch, 4, 4, 4, 4, VFilter);
}
void vp8_sixtap_predict_c
(
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;
HFilter = vp8_sub_pel_filters_6[xoffset]; /* 6 tap */
VFilter = vp8_sub_pel_filters_6[yoffset]; /* 6 tap */
filter_block2d_6(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter);
}
/*
* The difference between filter_block2d_6() and filter_block2d_avg_6 is
* that filter_block2d_6() does a 6-tap filter and stores it in the output
* buffer, whereas filter_block2d_avg_6() does the same 6-tap filter, and
* then averages that with the content already present in the output
* ((filter_result + dest + 1) >> 1) and stores that in the output.
*/
static void filter_block2d_avg_6
(
unsigned char *src_ptr,
unsigned char *output_ptr,
unsigned int src_pixels_per_line,
int output_pitch,
const short *HFilter,
const short *VFilter
) {
int FData[(3 + Interp_Extend * 2) * 4]; /* Temp data buffer used in filtering */
/* First filter 1-D horizontally... */
filter_block2d_first_pass_6(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line),
FData, src_pixels_per_line, 1,
3 + Interp_Extend * 2, 4, HFilter);
/* then filter verticaly... */
filter_block2d_second_pass_avg_6(FData + 4 * (Interp_Extend - 1), output_ptr,
output_pitch, 4, 4, 4, 4, VFilter);
}
void vp8_sixtap_predict_avg_c
(
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;
HFilter = vp8_sub_pel_filters_6[xoffset]; /* 6 tap */
VFilter = vp8_sub_pel_filters_6[yoffset]; /* 6 tap */
filter_block2d_avg_6(src_ptr, dst_ptr, src_pixels_per_line,
dst_pitch, HFilter, VFilter);
}
void vp8_sixtap_predict8x8_c
(
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;
// int FData[(7+Interp_Extend*2)*16]; /* Temp data buffer used in filtering */
int FData[(7 + Interp_Extend * 2) * 8]; /* Temp data buffer used in filtering */
HFilter = vp8_sub_pel_filters_6[xoffset]; /* 6 tap */
VFilter = vp8_sub_pel_filters_6[yoffset]; /* 6 tap */
/* First filter 1-D horizontally... */
filter_block2d_first_pass_6(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line), FData, src_pixels_per_line, 1,
7 + Interp_Extend * 2, 8, HFilter);
/* then filter verticaly... */
filter_block2d_second_pass_6(FData + 8 * (Interp_Extend - 1), dst_ptr, dst_pitch, 8, 8, 8, 8, VFilter);
}
void vp8_sixtap_predict_avg8x8_c
(
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;
// int FData[(7+Interp_Extend*2)*16]; /* Temp data buffer used in filtering */
int FData[(7 + Interp_Extend * 2) * 8]; /* Temp data buffer used in filtering */
HFilter = vp8_sub_pel_filters_6[xoffset]; /* 6 tap */
VFilter = vp8_sub_pel_filters_6[yoffset]; /* 6 tap */
/* First filter 1-D horizontally... */
filter_block2d_first_pass_6(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line), FData, src_pixels_per_line, 1,
7 + Interp_Extend * 2, 8, HFilter);
/* then filter verticaly... */
filter_block2d_second_pass_avg_6(FData + 8 * (Interp_Extend - 1), dst_ptr, dst_pitch, 8, 8, 8, 8, VFilter);
}
void vp8_sixtap_predict8x4_c
(
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;
// int FData[(7+Interp_Extend*2)*16]; /* Temp data buffer used in filtering */
int FData[(3 + Interp_Extend * 2) * 8]; /* Temp data buffer used in filtering */
HFilter = vp8_sub_pel_filters_6[xoffset]; /* 6 tap */
VFilter = vp8_sub_pel_filters_6[yoffset]; /* 6 tap */
/* First filter 1-D horizontally... */
filter_block2d_first_pass_6(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line), FData, src_pixels_per_line, 1,
3 + Interp_Extend * 2, 8, HFilter);
/* then filter verticaly... */
filter_block2d_second_pass_6(FData + 8 * (Interp_Extend - 1), dst_ptr, dst_pitch, 8, 8, 4, 8, VFilter);
}
void vp8_sixtap_predict16x16_c
(
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;
// int FData[(15+Interp_Extend*2)*24]; /* Temp data buffer used in filtering */
int FData[(15 + Interp_Extend * 2) * 16]; /* Temp data buffer used in filtering */
HFilter = vp8_sub_pel_filters_6[xoffset]; /* 6 tap */
VFilter = vp8_sub_pel_filters_6[yoffset]; /* 6 tap */
/* First filter 1-D horizontally... */
filter_block2d_first_pass_6(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line), FData, src_pixels_per_line, 1,
15 + Interp_Extend * 2, 16, HFilter);
/* then filter verticaly... */
filter_block2d_second_pass_6(FData + 16 * (Interp_Extend - 1), dst_ptr, dst_pitch, 16, 16, 16, 16, VFilter);
}
void vp8_sixtap_predict_avg16x16_c
(
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;
// int FData[(15+Interp_Extend*2)*24]; /* Temp data buffer used in filtering */
int FData[(15 + Interp_Extend * 2) * 16]; /* Temp data buffer used in filtering */
HFilter = vp8_sub_pel_filters_6[xoffset]; /* 6 tap */
VFilter = vp8_sub_pel_filters_6[yoffset]; /* 6 tap */
/* First filter 1-D horizontally... */
filter_block2d_first_pass_6(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line), FData,
src_pixels_per_line, 1, 15 + Interp_Extend * 2, 16, HFilter);
/* then filter verticaly... */
filter_block2d_second_pass_avg_6(FData + 16 * (Interp_Extend - 1), dst_ptr, dst_pitch,
16, 16, 16, 16, VFilter);
}
#undef Interp_Extend
#define Interp_Extend 4
static void filter_block2d_first_pass_8
(
unsigned char *src_ptr,
int *output_ptr,
unsigned int src_pixels_per_line,
unsigned int pixel_step,
unsigned int output_height,
unsigned int output_width,
const short *vp8_filter
) {
unsigned int i, j;
int Temp;
for (i = 0; i < output_height; i++) {
for (j = 0; j < output_width; j++) {
#if Interp_Extend == 4
Temp = ((int)src_ptr[-3 * (int)pixel_step] * vp8_filter[0]) +
((int)src_ptr[-2 * (int)pixel_step] * vp8_filter[1]) +
((int)src_ptr[-1 * (int)pixel_step] * vp8_filter[2]) +
((int)src_ptr[0] * vp8_filter[3]) +
((int)src_ptr[pixel_step] * vp8_filter[4]) +
((int)src_ptr[2 * pixel_step] * vp8_filter[5]) +
((int)src_ptr[3 * pixel_step] * vp8_filter[6]) +
((int)src_ptr[4 * pixel_step] * vp8_filter[7]) +
(VP8_FILTER_WEIGHT >> 1); /* Rounding */
#elif Interp_Extend == 5
Temp = ((int)src_ptr[-4 * (int)pixel_step] * vp8_filter[0]) +
((int)src_ptr[-3 * (int)pixel_step] * vp8_filter[1]) +
((int)src_ptr[-2 * (int)pixel_step] * vp8_filter[2]) +
((int)src_ptr[-1 * (int)pixel_step] * vp8_filter[3]) +
((int)src_ptr[0] * vp8_filter[4]) +
((int)src_ptr[pixel_step] * vp8_filter[5]) +
((int)src_ptr[2 * pixel_step] * vp8_filter[6]) +
((int)src_ptr[3 * pixel_step] * vp8_filter[7]) +
((int)src_ptr[4 * pixel_step] * vp8_filter[8]) +
((int)src_ptr[5 * pixel_step] * vp8_filter[9]) +
(VP8_FILTER_WEIGHT >> 1); /* Rounding */
#endif
/* Normalize back to 0-255 */
Temp = Temp >> VP8_FILTER_SHIFT;
if (Temp < 0)
Temp = 0;
else if (Temp > 255)
Temp = 255;
output_ptr[j] = Temp;
src_ptr++;
}
/* Next row... */
src_ptr += src_pixels_per_line - output_width;
output_ptr += output_width;
}
}
static void filter_block2d_second_pass_8
(
int *src_ptr,
unsigned char *output_ptr,
int output_pitch,
unsigned int src_pixels_per_line,
unsigned int pixel_step,
unsigned int output_height,
unsigned int output_width,
const short *vp8_filter
) {
unsigned int i, j;
int Temp;
for (i = 0; i < output_height; i++) {
for (j = 0; j < output_width; j++) {
/* Apply filter */
#if Interp_Extend == 4
Temp = ((int)src_ptr[-3 * (int)pixel_step] * vp8_filter[0]) +
((int)src_ptr[-2 * (int)pixel_step] * vp8_filter[1]) +
((int)src_ptr[-1 * (int)pixel_step] * vp8_filter[2]) +
((int)src_ptr[0] * vp8_filter[3]) +
((int)src_ptr[pixel_step] * vp8_filter[4]) +
((int)src_ptr[2 * pixel_step] * vp8_filter[5]) +
((int)src_ptr[3 * pixel_step] * vp8_filter[6]) +
((int)src_ptr[4 * pixel_step] * vp8_filter[7]) +
(VP8_FILTER_WEIGHT >> 1); /* Rounding */
#elif Interp_Extend == 5
Temp = ((int)src_ptr[-4 * (int)pixel_step] * vp8_filter[0]) +
((int)src_ptr[-3 * (int)pixel_step] * vp8_filter[1]) +
((int)src_ptr[-2 * (int)pixel_step] * vp8_filter[2]) +
((int)src_ptr[-1 * (int)pixel_step] * vp8_filter[3]) +
((int)src_ptr[0] * vp8_filter[4]) +
((int)src_ptr[pixel_step] * vp8_filter[5]) +
((int)src_ptr[2 * pixel_step] * vp8_filter[6]) +
((int)src_ptr[3 * pixel_step] * vp8_filter[7]) +
((int)src_ptr[4 * pixel_step] * vp8_filter[8]) +
((int)src_ptr[5 * pixel_step] * vp8_filter[9]) +
(VP8_FILTER_WEIGHT >> 1); /* Rounding */
#endif
/* Normalize back to 0-255 */
Temp = Temp >> VP8_FILTER_SHIFT;
if (Temp < 0)
Temp = 0;
else if (Temp > 255)
Temp = 255;
output_ptr[j] = (unsigned char)Temp;
src_ptr++;
}
/* Start next row */
src_ptr += src_pixels_per_line - output_width;
output_ptr += output_pitch;
}
}
/*
* The only functional difference between filter_block2d_second_pass()
* and this function is that filter_block2d_second_pass() does a sixtap
* filter on the input and stores it in the output. This function
* (filter_block2d_second_pass_avg()) does a sixtap filter on the input,
* and then averages that with the content already present in the output
* ((filter_result + dest + 1) >> 1) and stores that in the output.
*/
static void filter_block2d_second_pass_avg_8
(
int *src_ptr,
unsigned char *output_ptr,
int output_pitch,
unsigned int src_pixels_per_line,
unsigned int pixel_step,
unsigned int output_height,
unsigned int output_width,
const short *vp8_filter
) {
unsigned int i, j;
int Temp;
for (i = 0; i < output_height; i++) {
for (j = 0; j < output_width; j++) {
/* Apply filter */
#if Interp_Extend == 4
Temp = ((int)src_ptr[-3 * (int)pixel_step] * vp8_filter[0]) +
((int)src_ptr[-2 * (int)pixel_step] * vp8_filter[1]) +
((int)src_ptr[-1 * (int)pixel_step] * vp8_filter[2]) +
((int)src_ptr[0] * vp8_filter[3]) +
((int)src_ptr[pixel_step] * vp8_filter[4]) +
((int)src_ptr[2 * pixel_step] * vp8_filter[5]) +
((int)src_ptr[3 * pixel_step] * vp8_filter[6]) +
((int)src_ptr[4 * pixel_step] * vp8_filter[7]) +
(VP8_FILTER_WEIGHT >> 1); /* Rounding */
#elif Interp_Extend == 5
Temp = ((int)src_ptr[-4 * (int)pixel_step] * vp8_filter[0]) +
((int)src_ptr[-3 * (int)pixel_step] * vp8_filter[1]) +
((int)src_ptr[-2 * (int)pixel_step] * vp8_filter[2]) +
((int)src_ptr[-1 * (int)pixel_step] * vp8_filter[3]) +
((int)src_ptr[0] * vp8_filter[4]) +
((int)src_ptr[pixel_step] * vp8_filter[5]) +
((int)src_ptr[2 * pixel_step] * vp8_filter[6]) +
((int)src_ptr[3 * pixel_step] * vp8_filter[7]) +
((int)src_ptr[4 * pixel_step] * vp8_filter[8]) +
((int)src_ptr[5 * pixel_step] * vp8_filter[9]) +
(VP8_FILTER_WEIGHT >> 1); /* Rounding */
#endif
/* Normalize back to 0-255 */
Temp = Temp >> VP8_FILTER_SHIFT;
if (Temp < 0)
Temp = 0;
else if (Temp > 255)
Temp = 255;
output_ptr[j] = (unsigned char)((output_ptr[j] + Temp + 1) >> 1);
src_ptr++;
}
/* Start next row */
src_ptr += src_pixels_per_line - output_width;
output_ptr += output_pitch;
}
}
static void filter_block2d_8
(
unsigned char *src_ptr,
unsigned char *output_ptr,
unsigned int src_pixels_per_line,
int output_pitch,
const short *HFilter,
const short *VFilter
) {
int FData[(3 + Interp_Extend * 2) * 4]; /* Temp data buffer used in filtering */
/* First filter 1-D horizontally... */
filter_block2d_first_pass_8(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line), FData, src_pixels_per_line, 1,
3 + Interp_Extend * 2, 4, HFilter);
/* then filter verticaly... */
filter_block2d_second_pass_8(FData + 4 * (Interp_Extend - 1), output_ptr, output_pitch, 4, 4, 4, 4, VFilter);
}
static void filter_block2d_avg_8
(
unsigned char *src_ptr,
unsigned char *output_ptr,
unsigned int src_pixels_per_line,
int output_pitch,
const short *HFilter,
const short *VFilter
) {
int FData[(3 + Interp_Extend * 2) * 4]; /* Temp data buffer used in filtering */
/* First filter 1-D horizontally... */
filter_block2d_first_pass_8(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line), FData, src_pixels_per_line, 1,
3 + Interp_Extend * 2, 4, HFilter);
/* then filter verticaly... */
filter_block2d_second_pass_avg_8(FData + 4 * (Interp_Extend - 1), output_ptr, output_pitch, 4, 4, 4, 4, VFilter);
}
void vp8_eighttap_predict_c
(
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;
HFilter = vp8_sub_pel_filters_8[xoffset]; /* 8 tap */
VFilter = vp8_sub_pel_filters_8[yoffset]; /* 8 tap */
filter_block2d_8(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter);
}
void vp8_eighttap_predict_avg4x4_c
(
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;
HFilter = vp8_sub_pel_filters_8[xoffset]; /* 8 tap */
VFilter = vp8_sub_pel_filters_8[yoffset]; /* 8 tap */
filter_block2d_avg_8(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter);
}
void vp8_eighttap_predict_sharp_c
(
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;
HFilter = vp8_sub_pel_filters_8s[xoffset]; /* 8 tap */
VFilter = vp8_sub_pel_filters_8s[yoffset]; /* 8 tap */
filter_block2d_8(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter);
}
void vp8_eighttap_predict_avg4x4_sharp_c
(
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;
HFilter = vp8_sub_pel_filters_8s[xoffset]; /* 8 tap */
VFilter = vp8_sub_pel_filters_8s[yoffset]; /* 8 tap */
filter_block2d_avg_8(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter);
}
void vp8_eighttap_predict8x8_c
(
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;
// int FData[(7+Interp_Extend*2)*16]; /* Temp data buffer used in filtering */
int FData[(7 + Interp_Extend * 2) * 8]; /* Temp data buffer used in filtering */
HFilter = vp8_sub_pel_filters_8[xoffset]; /* 6 tap */
VFilter = vp8_sub_pel_filters_8[yoffset]; /* 6 tap */
/* First filter 1-D horizontally... */
filter_block2d_first_pass_8(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line), FData, src_pixels_per_line, 1,
7 + Interp_Extend * 2, 8, HFilter);
/* then filter verticaly... */
filter_block2d_second_pass_8(FData + 8 * (Interp_Extend - 1), dst_ptr, dst_pitch, 8, 8, 8, 8, VFilter);
}
void vp8_eighttap_predict8x8_sharp_c
(
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;
// int FData[(7+Interp_Extend*2)*16]; /* Temp data buffer used in filtering */
int FData[(7 + Interp_Extend * 2) * 8]; /* Temp data buffer used in filtering */
HFilter = vp8_sub_pel_filters_8s[xoffset]; /* 6 tap */
VFilter = vp8_sub_pel_filters_8s[yoffset]; /* 6 tap */
/* First filter 1-D horizontally... */
filter_block2d_first_pass_8(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line), FData, src_pixels_per_line, 1,
7 + Interp_Extend * 2, 8, HFilter);
/* then filter verticaly... */
filter_block2d_second_pass_8(FData + 8 * (Interp_Extend - 1), dst_ptr, dst_pitch, 8, 8, 8, 8, VFilter);
}
void vp8_eighttap_predict_avg8x8_c
(
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;
// int FData[(7+Interp_Extend*2)*16]; /* Temp data buffer used in filtering */
int FData[(7 + Interp_Extend * 2) * 8]; /* Temp data buffer used in filtering */
HFilter = vp8_sub_pel_filters_8[xoffset]; /* 6 tap */
VFilter = vp8_sub_pel_filters_8[yoffset]; /* 6 tap */
/* First filter 1-D horizontally... */
filter_block2d_first_pass_8(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line), FData, src_pixels_per_line, 1,
7 + Interp_Extend * 2, 8, HFilter);
/* then filter verticaly... */
filter_block2d_second_pass_avg_8(FData + 8 * (Interp_Extend - 1), dst_ptr, dst_pitch, 8, 8, 8, 8, VFilter);
}
void vp8_eighttap_predict_avg8x8_sharp_c
(
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;
// int FData[(7+Interp_Extend*2)*16]; /* Temp data buffer used in filtering */
int FData[(7 + Interp_Extend * 2) * 8]; /* Temp data buffer used in filtering */
HFilter = vp8_sub_pel_filters_8s[xoffset]; /* 6 tap */
VFilter = vp8_sub_pel_filters_8s[yoffset]; /* 6 tap */
/* First filter 1-D horizontally... */
filter_block2d_first_pass_8(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line), FData, src_pixels_per_line, 1,
7 + Interp_Extend * 2, 8, HFilter);
/* then filter verticaly... */
filter_block2d_second_pass_avg_8(FData + 8 * (Interp_Extend - 1), dst_ptr, dst_pitch, 8, 8, 8, 8, VFilter);
}
void vp8_eighttap_predict8x4_c
(
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;
// int FData[(7+Interp_Extend*2)*16]; /* Temp data buffer used in filtering */
int FData[(3 + Interp_Extend * 2) * 8]; /* Temp data buffer used in filtering */
HFilter = vp8_sub_pel_filters_8[xoffset]; /* 6 tap */
VFilter = vp8_sub_pel_filters_8[yoffset]; /* 6 tap */
/* First filter 1-D horizontally... */
filter_block2d_first_pass_8(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line), FData, src_pixels_per_line, 1,
3 + Interp_Extend * 2, 8, HFilter);
/* then filter verticaly... */
filter_block2d_second_pass_8(FData + 8 * (Interp_Extend - 1), dst_ptr, dst_pitch, 8, 8, 4, 8, VFilter);
}
void vp8_eighttap_predict8x4_sharp_c
(
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;
// int FData[(7+Interp_Extend*2)*16]; /* Temp data buffer used in filtering */
int FData[(3 + Interp_Extend * 2) * 8]; /* Temp data buffer used in filtering */
HFilter = vp8_sub_pel_filters_8s[xoffset]; /* 6 tap */
VFilter = vp8_sub_pel_filters_8s[yoffset]; /* 6 tap */
/* First filter 1-D horizontally... */
filter_block2d_first_pass_8(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line), FData, src_pixels_per_line, 1,
3 + Interp_Extend * 2, 8, HFilter);
/* then filter verticaly... */
filter_block2d_second_pass_8(FData + 8 * (Interp_Extend - 1), dst_ptr, dst_pitch, 8, 8, 4, 8, VFilter);
}
void vp8_eighttap_predict16x16_c
(
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;
// int FData[(15+Interp_Extend*2)*24]; /* Temp data buffer used in filtering */
int FData[(15 + Interp_Extend * 2) * 16]; /* Temp data buffer used in filtering */
HFilter = vp8_sub_pel_filters_8[xoffset]; /* 6 tap */
VFilter = vp8_sub_pel_filters_8[yoffset]; /* 6 tap */
/* First filter 1-D horizontally... */
filter_block2d_first_pass_8(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line), FData, src_pixels_per_line, 1,
15 + Interp_Extend * 2, 16, HFilter);
/* then filter verticaly... */
filter_block2d_second_pass_8(FData + 16 * (Interp_Extend - 1), dst_ptr, dst_pitch, 16, 16, 16, 16, VFilter);
}
void vp8_eighttap_predict16x16_sharp_c
(
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;
// int FData[(15+Interp_Extend*2)*24]; /* Temp data buffer used in filtering */
int FData[(15 + Interp_Extend * 2) * 16]; /* Temp data buffer used in filtering */
HFilter = vp8_sub_pel_filters_8s[xoffset]; /* 6 tap */
VFilter = vp8_sub_pel_filters_8s[yoffset]; /* 6 tap */
/* First filter 1-D horizontally... */
filter_block2d_first_pass_8(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line), FData, src_pixels_per_line, 1,
15 + Interp_Extend * 2, 16, HFilter);
/* then filter verticaly... */
filter_block2d_second_pass_8(FData + 16 * (Interp_Extend - 1), dst_ptr, dst_pitch, 16, 16, 16, 16, VFilter);
}
void vp8_eighttap_predict_avg16x16_c
(
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;
// int FData[(15+Interp_Extend*2)*24]; /* Temp data buffer used in filtering */
int FData[(15 + Interp_Extend * 2) * 16]; /* Temp data buffer used in filtering */
HFilter = vp8_sub_pel_filters_8[xoffset]; /* 6 tap */
VFilter = vp8_sub_pel_filters_8[yoffset]; /* 6 tap */
/* First filter 1-D horizontally... */
filter_block2d_first_pass_8(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line), FData,
src_pixels_per_line, 1, 15 + Interp_Extend * 2, 16, HFilter);
/* then filter verticaly... */
filter_block2d_second_pass_avg_8(FData + 16 * (Interp_Extend - 1), dst_ptr, dst_pitch,
16, 16, 16, 16, VFilter);
}
void vp8_eighttap_predict_avg16x16_sharp_c
(
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;
// int FData[(15+Interp_Extend*2)*24]; /* Temp data buffer used in filtering */
int FData[(15 + Interp_Extend * 2) * 16]; /* Temp data buffer used in filtering */
HFilter = vp8_sub_pel_filters_8s[xoffset]; /* 6 tap */
VFilter = vp8_sub_pel_filters_8s[yoffset]; /* 6 tap */
/* First filter 1-D horizontally... */
filter_block2d_first_pass_8(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line), FData,
src_pixels_per_line, 1, 15 + Interp_Extend * 2, 16, HFilter);
/* then filter verticaly... */
filter_block2d_second_pass_avg_8(FData + 16 * (Interp_Extend - 1), dst_ptr, dst_pitch,
16, 16, 16, 16, VFilter);
}
/****************************************************************************
*
* ROUTINE : filter_block2d_bil_first_pass
*
* INPUTS : UINT8 *src_ptr : Pointer to source block.
* UINT32 src_stride : Stride of source block.
* UINT32 height : Block height.
* UINT32 width : Block width.
* INT32 *vp8_filter : Array of 2 bi-linear filter taps.
*
* OUTPUTS : INT32 *dst_ptr : Pointer to filtered block.
*
* RETURNS : void
*
* FUNCTION : Applies a 1-D 2-tap bi-linear filter to the source block
* in the horizontal direction to produce the filtered output
* block. Used to implement first-pass of 2-D separable filter.
*
* SPECIAL NOTES : Produces INT32 output to retain precision for next pass.
* Two filter taps should sum to VP8_FILTER_WEIGHT.
*
****************************************************************************/
static void filter_block2d_bil_first_pass
(
unsigned char *src_ptr,
unsigned short *dst_ptr,
unsigned int src_stride,
unsigned int height,
unsigned int width,
const short *vp8_filter
) {
unsigned int i, j;
for (i = 0; i < height; i++) {
for (j = 0; j < width; j++) {
/* Apply bilinear filter */
dst_ptr[j] = (((int)src_ptr[0] * vp8_filter[0]) +
((int)src_ptr[1] * vp8_filter[1]) +
(VP8_FILTER_WEIGHT / 2)) >> VP8_FILTER_SHIFT;
src_ptr++;
}
/* Next row... */
src_ptr += src_stride - width;
dst_ptr += width;
}
}
/****************************************************************************
*
* ROUTINE : filter_block2d_bil_second_pass
*
* INPUTS : INT32 *src_ptr : Pointer to source block.
* UINT32 dst_pitch : Destination block pitch.
* UINT32 height : Block height.
* UINT32 width : Block width.
* INT32 *vp8_filter : Array of 2 bi-linear filter taps.
*
* OUTPUTS : UINT16 *dst_ptr : Pointer to filtered block.
*
* RETURNS : void
*
* FUNCTION : Applies a 1-D 2-tap bi-linear filter to the source block
* in the vertical direction to produce the filtered output
* block. Used to implement second-pass of 2-D separable filter.
*
* SPECIAL NOTES : Requires 32-bit input as produced by filter_block2d_bil_first_pass.
* Two filter taps should sum to VP8_FILTER_WEIGHT.
*
****************************************************************************/
static void filter_block2d_bil_second_pass
(
unsigned short *src_ptr,
unsigned char *dst_ptr,
int dst_pitch,
unsigned int height,
unsigned int width,
const short *vp8_filter
) {
unsigned int i, j;
int Temp;
for (i = 0; i < height; i++) {
for (j = 0; j < width; j++) {
/* Apply filter */
Temp = ((int)src_ptr[0] * vp8_filter[0]) +
((int)src_ptr[width] * vp8_filter[1]) +
(VP8_FILTER_WEIGHT / 2);
dst_ptr[j] = (unsigned int)(Temp >> VP8_FILTER_SHIFT);
src_ptr++;
}
/* Next row... */
dst_ptr += dst_pitch;
}
}
/*
* As before for filter_block2d_second_pass_avg(), the functional difference
* between filter_block2d_bil_second_pass() and filter_block2d_bil_second_pass_avg()
* is that filter_block2d_bil_second_pass() does a bilinear filter on input
* and stores the result in output; filter_block2d_bil_second_pass_avg(),
* instead, does a bilinear filter on input, averages the resulting value
* with the values already present in the output and stores the result of
* that back into the output ((filter_result + dest + 1) >> 1).
*/
static void filter_block2d_bil_second_pass_avg
(
unsigned short *src_ptr,
unsigned char *dst_ptr,
int dst_pitch,
unsigned int height,
unsigned int width,
const short *vp8_filter
) {
unsigned int i, j;
int Temp;
for (i = 0; i < height; i++) {
for (j = 0; j < width; j++) {
/* Apply filter */
Temp = ((int)src_ptr[0] * vp8_filter[0]) +
((int)src_ptr[width] * vp8_filter[1]) +
(VP8_FILTER_WEIGHT / 2);
dst_ptr[j] = (unsigned int)(((Temp >> VP8_FILTER_SHIFT) + dst_ptr[j] + 1) >> 1);
src_ptr++;
}
/* Next row... */
dst_ptr += dst_pitch;
}
}
/****************************************************************************
*
* ROUTINE : filter_block2d_bil
*
* INPUTS : UINT8 *src_ptr : Pointer to source block.
* UINT32 src_pitch : Stride of source block.
* UINT32 dst_pitch : Stride of destination block.
* INT32 *HFilter : Array of 2 horizontal filter taps.
* INT32 *VFilter : Array of 2 vertical filter taps.
* INT32 Width : Block width
* INT32 Height : Block height
*
* OUTPUTS : UINT16 *dst_ptr : Pointer to filtered block.
*
* RETURNS : void
*
* FUNCTION : 2-D filters an input block by applying a 2-tap
* bi-linear filter horizontally followed by a 2-tap
* bi-linear filter vertically on the result.
*
* SPECIAL NOTES : The largest block size can be handled here is 16x16
*
****************************************************************************/
static void filter_block2d_bil
(
unsigned char *src_ptr,
unsigned char *dst_ptr,
unsigned int src_pitch,
unsigned int dst_pitch,
const short *HFilter,
const short *VFilter,
int Width,
int Height
) {
unsigned short FData[17 * 16]; /* Temp data buffer used in filtering */
/* First filter 1-D horizontally... */
filter_block2d_bil_first_pass(src_ptr, FData, src_pitch, Height + 1, Width, HFilter);
/* then 1-D vertically... */
filter_block2d_bil_second_pass(FData, dst_ptr, dst_pitch, Height, Width, VFilter);
}
static void filter_block2d_bil_avg
(
unsigned char *src_ptr,
unsigned char *dst_ptr,
unsigned int src_pitch,
unsigned int dst_pitch,
const short *HFilter,
const short *VFilter,
int Width,
int Height
) {
unsigned short FData[17 * 16]; /* Temp data buffer used in filtering */
/* First filter 1-D horizontally... */
filter_block2d_bil_first_pass(src_ptr, FData, src_pitch, Height + 1, Width, HFilter);
/* then 1-D vertically... */
filter_block2d_bil_second_pass_avg(FData, dst_ptr, dst_pitch, Height, Width, VFilter);
}
void vp8_bilinear_predict4x4_c
(
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;
HFilter = vp8_bilinear_filters[xoffset];
VFilter = vp8_bilinear_filters[yoffset];
#if 0
{
int i;
unsigned char temp1[16];
unsigned char temp2[16];
bilinear_predict4x4_mmx(src_ptr, src_pixels_per_line, xoffset, yoffset, temp1, 4);
filter_block2d_bil(src_ptr, temp2, src_pixels_per_line, 4, HFilter, VFilter, 4, 4);
for (i = 0; i < 16; i++) {
if (temp1[i] != temp2[i]) {
bilinear_predict4x4_mmx(src_ptr, src_pixels_per_line, xoffset, yoffset, temp1, 4);
filter_block2d_bil(src_ptr, temp2, src_pixels_per_line, 4, HFilter, VFilter, 4, 4);
}
}
}
#endif
filter_block2d_bil(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter, 4, 4);
}
void vp8_bilinear_predict_avg4x4_c
(
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;
HFilter = vp8_bilinear_filters[xoffset];
VFilter = vp8_bilinear_filters[yoffset];
filter_block2d_bil_avg(src_ptr, dst_ptr, src_pixels_per_line,
dst_pitch, HFilter, VFilter, 4, 4);
}
void vp8_bilinear_predict8x8_c
(
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;
HFilter = vp8_bilinear_filters[xoffset];
VFilter = vp8_bilinear_filters[yoffset];
filter_block2d_bil(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter, 8, 8);
}
void vp8_bilinear_predict_avg8x8_c
(
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;
HFilter = vp8_bilinear_filters[xoffset];
VFilter = vp8_bilinear_filters[yoffset];
filter_block2d_bil_avg(src_ptr, dst_ptr, src_pixels_per_line,
dst_pitch, HFilter, VFilter, 8, 8);
}
void vp8_bilinear_predict8x4_c
(
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;
HFilter = vp8_bilinear_filters[xoffset];
VFilter = vp8_bilinear_filters[yoffset];
filter_block2d_bil(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter, 8, 4);
}
void vp8_bilinear_predict16x16_c
(
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;
HFilter = vp8_bilinear_filters[xoffset];
VFilter = vp8_bilinear_filters[yoffset];
filter_block2d_bil(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter, 16, 16);
}
void vp8_bilinear_predict_avg16x16_c
(
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;
HFilter = vp8_bilinear_filters[xoffset];
VFilter = vp8_bilinear_filters[yoffset];
filter_block2d_bil_avg(src_ptr, dst_ptr, src_pixels_per_line,
dst_pitch, HFilter, VFilter, 16, 16);
}