493 строки
14 KiB
C
493 строки
14 KiB
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 "filter.h"
|
|
|
|
DECLARE_ALIGNED(16, const short, vp8_bilinear_filters[8][2]) =
|
|
{
|
|
{ 128, 0 },
|
|
{ 112, 16 },
|
|
{ 96, 32 },
|
|
{ 80, 48 },
|
|
{ 64, 64 },
|
|
{ 48, 80 },
|
|
{ 32, 96 },
|
|
{ 16, 112 }
|
|
};
|
|
|
|
DECLARE_ALIGNED(16, const short, vp8_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 },
|
|
};
|
|
|
|
static void filter_block2d_first_pass
|
|
(
|
|
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
|
|
(
|
|
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;
|
|
}
|
|
}
|
|
|
|
|
|
static void filter_block2d
|
|
(
|
|
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[9*4]; /* Temp data buffer used in filtering */
|
|
|
|
/* First filter 1-D horizontally... */
|
|
filter_block2d_first_pass(src_ptr - (2 * src_pixels_per_line), FData, src_pixels_per_line, 1, 9, 4, HFilter);
|
|
|
|
/* then filter verticaly... */
|
|
filter_block2d_second_pass(FData + 8, output_ptr, output_pitch, 4, 4, 4, 4, VFilter);
|
|
}
|
|
|
|
|
|
void vp8_sixtap_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_sub_pel_filters[xoffset]; /* 6 tap */
|
|
VFilter = vp8_sub_pel_filters[yoffset]; /* 6 tap */
|
|
|
|
filter_block2d(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[13*16]; /* Temp data buffer used in filtering */
|
|
|
|
HFilter = vp8_sub_pel_filters[xoffset]; /* 6 tap */
|
|
VFilter = vp8_sub_pel_filters[yoffset]; /* 6 tap */
|
|
|
|
/* First filter 1-D horizontally... */
|
|
filter_block2d_first_pass(src_ptr - (2 * src_pixels_per_line), FData, src_pixels_per_line, 1, 13, 8, HFilter);
|
|
|
|
|
|
/* then filter verticaly... */
|
|
filter_block2d_second_pass(FData + 16, 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[13*16]; /* Temp data buffer used in filtering */
|
|
|
|
HFilter = vp8_sub_pel_filters[xoffset]; /* 6 tap */
|
|
VFilter = vp8_sub_pel_filters[yoffset]; /* 6 tap */
|
|
|
|
/* First filter 1-D horizontally... */
|
|
filter_block2d_first_pass(src_ptr - (2 * src_pixels_per_line), FData, src_pixels_per_line, 1, 9, 8, HFilter);
|
|
|
|
|
|
/* then filter verticaly... */
|
|
filter_block2d_second_pass(FData + 16, 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[21*24]; /* Temp data buffer used in filtering */
|
|
|
|
|
|
HFilter = vp8_sub_pel_filters[xoffset]; /* 6 tap */
|
|
VFilter = vp8_sub_pel_filters[yoffset]; /* 6 tap */
|
|
|
|
/* First filter 1-D horizontally... */
|
|
filter_block2d_first_pass(src_ptr - (2 * src_pixels_per_line), FData, src_pixels_per_line, 1, 21, 16, HFilter);
|
|
|
|
/* then filter verticaly... */
|
|
filter_block2d_second_pass(FData + 32, 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;
|
|
}
|
|
}
|
|
|
|
|
|
/****************************************************************************
|
|
*
|
|
* 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);
|
|
}
|
|
|
|
|
|
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_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_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);
|
|
}
|