1 /* 2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 12 #include <math.h> 13 #include "subpixel.h" 14 15 #define BLOCK_HEIGHT_WIDTH 4 16 #define VP8_FILTER_WEIGHT 128 17 #define VP8_FILTER_SHIFT 7 18 19 static const short bilinear_filters[8][2] = 20 { 21 { 128, 0 }, 22 { 112, 16 }, 23 { 96, 32 }, 24 { 80, 48 }, 25 { 64, 64 }, 26 { 48, 80 }, 27 { 32, 96 }, 28 { 16, 112 } 29 }; 30 31 32 extern void vp8_filter_block2d_bil_first_pass_armv6 33 ( 34 unsigned char *src_ptr, 35 unsigned short *output_ptr, 36 unsigned int src_pixels_per_line, 37 unsigned int output_height, 38 unsigned int output_width, 39 const short *vp8_filter 40 ); 41 42 extern void vp8_filter_block2d_bil_second_pass_armv6 43 ( 44 unsigned short *src_ptr, 45 unsigned char *output_ptr, 46 int output_pitch, 47 unsigned int output_height, 48 unsigned int output_width, 49 const short *vp8_filter 50 ); 51 52 #if 0 53 void vp8_filter_block2d_bil_first_pass_6 54 ( 55 unsigned char *src_ptr, 56 unsigned short *output_ptr, 57 unsigned int src_pixels_per_line, 58 unsigned int output_height, 59 unsigned int output_width, 60 const short *vp8_filter 61 ) 62 { 63 unsigned int i, j; 64 65 for ( i=0; i<output_height; i++ ) 66 { 67 for ( j=0; j<output_width; j++ ) 68 { 69 /* Apply bilinear filter */ 70 output_ptr[j] = ( ( (int)src_ptr[0] * vp8_filter[0]) + 71 ((int)src_ptr[1] * vp8_filter[1]) + 72 (VP8_FILTER_WEIGHT/2) ) >> VP8_FILTER_SHIFT; 73 src_ptr++; 74 } 75 76 /* Next row... */ 77 src_ptr += src_pixels_per_line - output_width; 78 output_ptr += output_width; 79 } 80 } 81 82 void vp8_filter_block2d_bil_second_pass_6 83 ( 84 unsigned short *src_ptr, 85 unsigned char *output_ptr, 86 int output_pitch, 87 unsigned int output_height, 88 unsigned int output_width, 89 const short *vp8_filter 90 ) 91 { 92 unsigned int i,j; 93 int Temp; 94 95 for ( i=0; i<output_height; i++ ) 96 { 97 for ( j=0; j<output_width; j++ ) 98 { 99 /* Apply filter */ 100 Temp = ((int)src_ptr[0] * vp8_filter[0]) + 101 ((int)src_ptr[output_width] * vp8_filter[1]) + 102 (VP8_FILTER_WEIGHT/2); 103 output_ptr[j] = (unsigned int)(Temp >> VP8_FILTER_SHIFT); 104 src_ptr++; 105 } 106 107 /* Next row... */ 108 /*src_ptr += src_pixels_per_line - output_width;*/ 109 output_ptr += output_pitch; 110 } 111 } 112 #endif 113 114 void vp8_filter_block2d_bil_armv6 115 ( 116 unsigned char *src_ptr, 117 unsigned char *output_ptr, 118 unsigned int src_pixels_per_line, 119 unsigned int dst_pitch, 120 const short *HFilter, 121 const short *VFilter, 122 int Width, 123 int Height 124 ) 125 { 126 127 unsigned short FData[36*16]; /* Temp data bufffer used in filtering */ 128 129 /* First filter 1-D horizontally... */ 130 /* pixel_step = 1; */ 131 vp8_filter_block2d_bil_first_pass_armv6(src_ptr, FData, src_pixels_per_line, Height + 1, Width, HFilter); 132 133 /* then 1-D vertically... */ 134 vp8_filter_block2d_bil_second_pass_armv6(FData, output_ptr, dst_pitch, Height, Width, VFilter); 135 } 136 137 138 void vp8_bilinear_predict4x4_armv6 139 ( 140 unsigned char *src_ptr, 141 int src_pixels_per_line, 142 int xoffset, 143 int yoffset, 144 unsigned char *dst_ptr, 145 int dst_pitch 146 ) 147 { 148 const short *HFilter; 149 const short *VFilter; 150 151 HFilter = bilinear_filters[xoffset]; 152 VFilter = bilinear_filters[yoffset]; 153 154 vp8_filter_block2d_bil_armv6(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter, 4, 4); 155 } 156 157 void vp8_bilinear_predict8x8_armv6 158 ( 159 unsigned char *src_ptr, 160 int src_pixels_per_line, 161 int xoffset, 162 int yoffset, 163 unsigned char *dst_ptr, 164 int dst_pitch 165 ) 166 { 167 const short *HFilter; 168 const short *VFilter; 169 170 HFilter = bilinear_filters[xoffset]; 171 VFilter = bilinear_filters[yoffset]; 172 173 vp8_filter_block2d_bil_armv6(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter, 8, 8); 174 } 175 176 void vp8_bilinear_predict8x4_armv6 177 ( 178 unsigned char *src_ptr, 179 int src_pixels_per_line, 180 int xoffset, 181 int yoffset, 182 unsigned char *dst_ptr, 183 int dst_pitch 184 ) 185 { 186 const short *HFilter; 187 const short *VFilter; 188 189 HFilter = bilinear_filters[xoffset]; 190 VFilter = bilinear_filters[yoffset]; 191 192 vp8_filter_block2d_bil_armv6(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter, 8, 4); 193 } 194 195 void vp8_bilinear_predict16x16_armv6 196 ( 197 unsigned char *src_ptr, 198 int src_pixels_per_line, 199 int xoffset, 200 int yoffset, 201 unsigned char *dst_ptr, 202 int dst_pitch 203 ) 204 { 205 const short *HFilter; 206 const short *VFilter; 207 208 HFilter = bilinear_filters[xoffset]; 209 VFilter = bilinear_filters[yoffset]; 210 211 vp8_filter_block2d_bil_armv6(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter, 16, 16); 212 } 213
