822 lines
27 KiB
C
822 lines
27 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <stdlib.h>
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#include "filter.h"
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#include "vpx_ports/mem.h"
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DECLARE_ALIGNED(16, const short, vp8_bilinear_filters[8][2]) =
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{
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{ 128, 0 },
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{ 112, 16 },
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{ 96, 32 },
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{ 80, 48 },
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{ 64, 64 },
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{ 48, 80 },
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{ 32, 96 },
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{ 16, 112 }
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};
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#if CONFIG_ENHANCED_INTERP
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#define FILTER_ALPHA 90
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DECLARE_ALIGNED(16, const short, vp8_sub_pel_filters[8][2*INTERP_EXTEND]) =
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{
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/* Generated using MATLAB:
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* alpha = 0.9;
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* b=intfilt(8,4,alpha);
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* bi=round(128*b);
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* ba=flipud(reshape([bi 0], 8, 8));
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* disp(num2str(ba, '%d,'))
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*/
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#if FILTER_ALPHA == 90
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/* alpha = 0.90 */
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{ 0, 0, 0, 128, 0, 0, 0, 0},
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{-3, 6, -13, 125, 18, -8, 5, -2},
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{-5, 11, -21, 115, 39, -15, 9, -5},
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{-7, 14, -25, 100, 61, -21, 13, -7},
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{-7, 14, -25, 82, 82, -25, 14, -7},
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{-7, 13, -21, 61, 100, -25, 14, -7},
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{-5, 9, -15, 39, 115, -21, 11, -5},
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{-2, 5, -8, 18, 125, -13, 6, -3}
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#elif FILTER_ALPHA == 85
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/* alpha = 0.85 */
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{ 0, 0, 0, 128, 0, 0, 0, 0},
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{-2, 5, -12, 124, 18, -7, 4, -2},
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{-4, 10, -20, 114, 39, -15, 8, -4},
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{-5, 12, -24, 100, 60, -21, 11, -5},
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{-5, 12, -24, 81, 81, -24, 12, -5},
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{-5, 11, -21, 60, 100, -24, 12, -5},
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{-4, 8, -15, 39, 114, -20, 10, -4},
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{-2, 4, -7, 18, 124, -12, 5, -2}
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#elif FILTER_ALPHA == 75
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/* alpha = 0.75 */
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{ 0, 0, 0, 128, 0, 0, 0, 0},
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{-1, 4, -11, 123, 18, -7, 3, -1},
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{-2, 7, -19, 113, 38, -14, 6, -2},
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{-3, 9, -22, 98, 59, -19, 8, -3},
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{-3, 9, -22, 80, 80, -22, 9, -3},
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{-3, 8, -19, 59, 98, -22, 9, -3},
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{-2, 6, -14, 38, 113, -19, 7, -2},
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{-1, 3, -7, 18, 123, -11, 4, -1}
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#endif
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};
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#else
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DECLARE_ALIGNED(16, const short, vp8_sub_pel_filters[8][6]) =
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{
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{ 0, 0, 128, 0, 0, 0 }, /* note that 1/8 pel positions are just as per alpha -0.5 bicubic */
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{ 0, -6, 123, 12, -1, 0 },
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{ 2, -11, 108, 36, -8, 1 }, /* New 1/4 pel 6 tap filter */
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{ 0, -9, 93, 50, -6, 0 },
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{ 3, -16, 77, 77, -16, 3 }, /* New 1/2 pel 6 tap filter */
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{ 0, -6, 50, 93, -9, 0 },
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{ 1, -8, 36, 108, -11, 2 }, /* New 1/4 pel 6 tap filter */
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{ 0, -1, 12, 123, -6, 0 },
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};
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#endif
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static void filter_block2d_first_pass
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(
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unsigned char *src_ptr,
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int *output_ptr,
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unsigned int src_pixels_per_line,
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unsigned int pixel_step,
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unsigned int output_height,
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unsigned int output_width,
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const short *vp8_filter
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)
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{
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unsigned int i, j;
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int Temp;
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for (i = 0; i < output_height; i++)
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{
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for (j = 0; j < output_width; j++)
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{
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#if INTERP_EXTEND == 3
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Temp = ((int)src_ptr[-2 * (int)pixel_step] * vp8_filter[0]) +
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((int)src_ptr[-1 * (int)pixel_step] * vp8_filter[1]) +
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((int)src_ptr[0] * vp8_filter[2]) +
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((int)src_ptr[pixel_step] * vp8_filter[3]) +
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((int)src_ptr[2*pixel_step] * vp8_filter[4]) +
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((int)src_ptr[3*pixel_step] * vp8_filter[5]) +
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(VP8_FILTER_WEIGHT >> 1); /* Rounding */
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#elif INTERP_EXTEND == 4
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Temp = ((int)src_ptr[-3 * (int)pixel_step] * vp8_filter[0]) +
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((int)src_ptr[-2 * (int)pixel_step] * vp8_filter[1]) +
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((int)src_ptr[-1 * (int)pixel_step] * vp8_filter[2]) +
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((int)src_ptr[0] * vp8_filter[3]) +
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((int)src_ptr[pixel_step] * vp8_filter[4]) +
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((int)src_ptr[2 * pixel_step] * vp8_filter[5]) +
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((int)src_ptr[3 * pixel_step] * vp8_filter[6]) +
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((int)src_ptr[4 * pixel_step] * vp8_filter[7]) +
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(VP8_FILTER_WEIGHT >> 1); /* Rounding */
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#elif INTERP_EXTEND == 5
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Temp = ((int)src_ptr[-4 * (int)pixel_step] * vp8_filter[0]) +
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((int)src_ptr[-3 * (int)pixel_step] * vp8_filter[1]) +
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((int)src_ptr[-2 * (int)pixel_step] * vp8_filter[2]) +
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((int)src_ptr[-1 * (int)pixel_step] * vp8_filter[3]) +
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((int)src_ptr[0] * vp8_filter[4]) +
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((int)src_ptr[pixel_step] * vp8_filter[5]) +
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((int)src_ptr[2 * pixel_step] * vp8_filter[6]) +
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((int)src_ptr[3 * pixel_step] * vp8_filter[7]) +
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((int)src_ptr[4 * pixel_step] * vp8_filter[8]) +
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((int)src_ptr[5 * pixel_step] * vp8_filter[9]) +
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(VP8_FILTER_WEIGHT >> 1); /* Rounding */
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#endif
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/* Normalize back to 0-255 */
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Temp = Temp >> VP8_FILTER_SHIFT;
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if (Temp < 0)
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Temp = 0;
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else if (Temp > 255)
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Temp = 255;
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output_ptr[j] = Temp;
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src_ptr++;
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}
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/* Next row... */
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src_ptr += src_pixels_per_line - output_width;
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output_ptr += output_width;
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}
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}
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static void filter_block2d_second_pass
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(
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int *src_ptr,
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unsigned char *output_ptr,
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int output_pitch,
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unsigned int src_pixels_per_line,
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unsigned int pixel_step,
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unsigned int output_height,
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unsigned int output_width,
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const short *vp8_filter
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)
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{
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unsigned int i, j;
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int Temp;
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for (i = 0; i < output_height; i++)
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{
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for (j = 0; j < output_width; j++)
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{
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/* Apply filter */
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#if INTERP_EXTEND == 3
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Temp = ((int)src_ptr[-2 * (int)pixel_step] * vp8_filter[0]) +
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((int)src_ptr[-1 * (int)pixel_step] * vp8_filter[1]) +
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((int)src_ptr[0] * vp8_filter[2]) +
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((int)src_ptr[pixel_step] * vp8_filter[3]) +
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((int)src_ptr[2*pixel_step] * vp8_filter[4]) +
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((int)src_ptr[3*pixel_step] * vp8_filter[5]) +
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(VP8_FILTER_WEIGHT >> 1); /* Rounding */
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#elif INTERP_EXTEND == 4
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Temp = ((int)src_ptr[-3 * (int)pixel_step] * vp8_filter[0]) +
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((int)src_ptr[-2 * (int)pixel_step] * vp8_filter[1]) +
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((int)src_ptr[-1 * (int)pixel_step] * vp8_filter[2]) +
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((int)src_ptr[0] * vp8_filter[3]) +
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((int)src_ptr[pixel_step] * vp8_filter[4]) +
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((int)src_ptr[2 * pixel_step] * vp8_filter[5]) +
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((int)src_ptr[3 * pixel_step] * vp8_filter[6]) +
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((int)src_ptr[4 * pixel_step] * vp8_filter[7]) +
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(VP8_FILTER_WEIGHT >> 1); /* Rounding */
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#elif INTERP_EXTEND == 5
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Temp = ((int)src_ptr[-4 * (int)pixel_step] * vp8_filter[0]) +
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((int)src_ptr[-3 * (int)pixel_step] * vp8_filter[1]) +
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((int)src_ptr[-2 * (int)pixel_step] * vp8_filter[2]) +
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((int)src_ptr[-1 * (int)pixel_step] * vp8_filter[3]) +
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((int)src_ptr[0] * vp8_filter[4]) +
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((int)src_ptr[pixel_step] * vp8_filter[5]) +
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((int)src_ptr[2 * pixel_step] * vp8_filter[6]) +
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((int)src_ptr[3 * pixel_step] * vp8_filter[7]) +
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((int)src_ptr[4 * pixel_step] * vp8_filter[8]) +
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((int)src_ptr[5 * pixel_step] * vp8_filter[9]) +
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(VP8_FILTER_WEIGHT >> 1); /* Rounding */
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#endif
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/* Normalize back to 0-255 */
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Temp = Temp >> VP8_FILTER_SHIFT;
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if (Temp < 0)
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Temp = 0;
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else if (Temp > 255)
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Temp = 255;
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output_ptr[j] = (unsigned char)Temp;
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src_ptr++;
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}
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/* Start next row */
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src_ptr += src_pixels_per_line - output_width;
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output_ptr += output_pitch;
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}
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}
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/*
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* The only functional difference between filter_block2d_second_pass()
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* and this function is that filter_block2d_second_pass() does a sixtap
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* filter on the input and stores it in the output. This function
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* (filter_block2d_second_pass_avg()) does a sixtap filter on the input,
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* and then averages that with the content already present in the output
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* ((filter_result + dest + 1) >> 1) and stores that in the output.
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*/
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static void filter_block2d_second_pass_avg
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(
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int *src_ptr,
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unsigned char *output_ptr,
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int output_pitch,
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unsigned int src_pixels_per_line,
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unsigned int pixel_step,
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unsigned int output_height,
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unsigned int output_width,
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const short *vp8_filter
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)
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{
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unsigned int i, j;
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int Temp;
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for (i = 0; i < output_height; i++)
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{
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for (j = 0; j < output_width; j++)
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{
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/* Apply filter */
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#if INTERP_EXTEND == 3
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Temp = ((int)src_ptr[-2 * (int)pixel_step] * vp8_filter[0]) +
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((int)src_ptr[-1 * (int)pixel_step] * vp8_filter[1]) +
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((int)src_ptr[0] * vp8_filter[2]) +
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((int)src_ptr[pixel_step] * vp8_filter[3]) +
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((int)src_ptr[2*pixel_step] * vp8_filter[4]) +
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((int)src_ptr[3*pixel_step] * vp8_filter[5]) +
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(VP8_FILTER_WEIGHT >> 1); /* Rounding */
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#elif INTERP_EXTEND == 4
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Temp = ((int)src_ptr[-3 * (int)pixel_step] * vp8_filter[0]) +
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((int)src_ptr[-2 * (int)pixel_step] * vp8_filter[1]) +
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((int)src_ptr[-1 * (int)pixel_step] * vp8_filter[2]) +
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((int)src_ptr[0] * vp8_filter[3]) +
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((int)src_ptr[pixel_step] * vp8_filter[4]) +
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((int)src_ptr[2 * pixel_step] * vp8_filter[5]) +
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((int)src_ptr[3 * pixel_step] * vp8_filter[6]) +
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((int)src_ptr[4 * pixel_step] * vp8_filter[7]) +
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(VP8_FILTER_WEIGHT >> 1); /* Rounding */
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#elif INTERP_EXTEND == 5
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Temp = ((int)src_ptr[-4 * (int)pixel_step] * vp8_filter[0]) +
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((int)src_ptr[-3 * (int)pixel_step] * vp8_filter[1]) +
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((int)src_ptr[-2 * (int)pixel_step] * vp8_filter[2]) +
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((int)src_ptr[-1 * (int)pixel_step] * vp8_filter[3]) +
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((int)src_ptr[0] * vp8_filter[4]) +
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((int)src_ptr[pixel_step] * vp8_filter[5]) +
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((int)src_ptr[2 * pixel_step] * vp8_filter[6]) +
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((int)src_ptr[3 * pixel_step] * vp8_filter[7]) +
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((int)src_ptr[4 * pixel_step] * vp8_filter[8]) +
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((int)src_ptr[5 * pixel_step] * vp8_filter[9]) +
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(VP8_FILTER_WEIGHT >> 1); /* Rounding */
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#endif
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/* Normalize back to 0-255 */
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Temp = Temp >> VP8_FILTER_SHIFT;
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if (Temp < 0)
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Temp = 0;
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else if (Temp > 255)
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Temp = 255;
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output_ptr[j] = (unsigned char) ((output_ptr[j] + Temp + 1) >> 1);
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src_ptr++;
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}
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/* Start next row */
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src_ptr += src_pixels_per_line - output_width;
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output_ptr += output_pitch;
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}
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}
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static void filter_block2d
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(
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unsigned char *src_ptr,
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unsigned char *output_ptr,
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unsigned int src_pixels_per_line,
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int output_pitch,
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const short *HFilter,
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const short *VFilter
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)
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{
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int FData[(3+INTERP_EXTEND*2)*4]; /* Temp data buffer used in filtering */
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/* First filter 1-D horizontally... */
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filter_block2d_first_pass(src_ptr - ((INTERP_EXTEND-1) * src_pixels_per_line), FData, src_pixels_per_line, 1,
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3+INTERP_EXTEND*2, 4, HFilter);
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/* then filter verticaly... */
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filter_block2d_second_pass(FData + 4*(INTERP_EXTEND-1), output_ptr, output_pitch, 4, 4, 4, 4, VFilter);
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}
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void vp8_sixtap_predict_c
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(
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unsigned char *src_ptr,
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int src_pixels_per_line,
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int xoffset,
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int yoffset,
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unsigned char *dst_ptr,
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int dst_pitch
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)
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{
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const short *HFilter;
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const short *VFilter;
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HFilter = vp8_sub_pel_filters[xoffset]; /* 6 tap */
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VFilter = vp8_sub_pel_filters[yoffset]; /* 6 tap */
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filter_block2d(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter);
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}
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void vp8_sixtap_predict8x8_c
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(
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unsigned char *src_ptr,
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int src_pixels_per_line,
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int xoffset,
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int yoffset,
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unsigned char *dst_ptr,
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int dst_pitch
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)
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{
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const short *HFilter;
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const short *VFilter;
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// int FData[(7+INTERP_EXTEND*2)*16]; /* Temp data buffer used in filtering */
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int FData[(7+INTERP_EXTEND*2)*8]; /* Temp data buffer used in filtering */
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HFilter = vp8_sub_pel_filters[xoffset]; /* 6 tap */
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VFilter = vp8_sub_pel_filters[yoffset]; /* 6 tap */
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/* First filter 1-D horizontally... */
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filter_block2d_first_pass(src_ptr - ((INTERP_EXTEND-1) * src_pixels_per_line), FData, src_pixels_per_line, 1,
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7+INTERP_EXTEND*2, 8, HFilter);
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/* then filter verticaly... */
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filter_block2d_second_pass(FData + 8*(INTERP_EXTEND-1), dst_ptr, dst_pitch, 8, 8, 8, 8, VFilter);
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}
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void vp8_sixtap_predict_avg8x8_c
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(
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unsigned char *src_ptr,
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int src_pixels_per_line,
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int xoffset,
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int yoffset,
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unsigned char *dst_ptr,
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int dst_pitch
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)
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{
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const short *HFilter;
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const short *VFilter;
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// int FData[(7+INTERP_EXTEND*2)*16]; /* Temp data buffer used in filtering */
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int FData[(7+INTERP_EXTEND*2)*8]; /* Temp data buffer used in filtering */
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HFilter = vp8_sub_pel_filters[xoffset]; /* 6 tap */
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VFilter = vp8_sub_pel_filters[yoffset]; /* 6 tap */
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/* First filter 1-D horizontally... */
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filter_block2d_first_pass(src_ptr - ((INTERP_EXTEND-1) * src_pixels_per_line), FData, src_pixels_per_line, 1,
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7+INTERP_EXTEND*2, 8, HFilter);
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/* then filter verticaly... */
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filter_block2d_second_pass_avg(FData + 8*(INTERP_EXTEND-1), dst_ptr, dst_pitch, 8, 8, 8, 8, VFilter);
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}
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void vp8_sixtap_predict8x4_c
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(
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unsigned char *src_ptr,
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int src_pixels_per_line,
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int xoffset,
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int yoffset,
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unsigned char *dst_ptr,
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int dst_pitch
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)
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{
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const short *HFilter;
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const short *VFilter;
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// int FData[(7+INTERP_EXTEND*2)*16]; /* Temp data buffer used in filtering */
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int FData[(3+INTERP_EXTEND*2)*8]; /* Temp data buffer used in filtering */
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HFilter = vp8_sub_pel_filters[xoffset]; /* 6 tap */
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VFilter = vp8_sub_pel_filters[yoffset]; /* 6 tap */
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/* First filter 1-D horizontally... */
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filter_block2d_first_pass(src_ptr - ((INTERP_EXTEND-1) * src_pixels_per_line), FData, src_pixels_per_line, 1,
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3+INTERP_EXTEND*2, 8, HFilter);
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/* then filter verticaly... */
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filter_block2d_second_pass(FData + 8*(INTERP_EXTEND-1), dst_ptr, dst_pitch, 8, 8, 4, 8, VFilter);
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}
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void vp8_sixtap_predict16x16_c
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(
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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[xoffset]; /* 6 tap */
|
|
VFilter = vp8_sub_pel_filters[yoffset]; /* 6 tap */
|
|
|
|
/* First filter 1-D horizontally... */
|
|
filter_block2d_first_pass(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(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[xoffset]; /* 6 tap */
|
|
VFilter = vp8_sub_pel_filters[yoffset]; /* 6 tap */
|
|
|
|
/* First filter 1-D horizontally... */
|
|
filter_block2d_first_pass(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(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_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);
|
|
}
|