1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libvpx/vp8/common/reconintra4x4.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,297 @@
1.4 +/*
1.5 + * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license
1.8 + * that can be found in the LICENSE file in the root of the source
1.9 + * tree. An additional intellectual property rights grant can be found
1.10 + * in the file PATENTS. All contributing project authors may
1.11 + * be found in the AUTHORS file in the root of the source tree.
1.12 + */
1.13 +
1.14 +
1.15 +#include "vpx_config.h"
1.16 +#include "vp8_rtcd.h"
1.17 +#include "blockd.h"
1.18 +
1.19 +void vp8_intra4x4_predict_c(unsigned char *Above,
1.20 + unsigned char *yleft, int left_stride,
1.21 + int _b_mode,
1.22 + unsigned char *dst, int dst_stride,
1.23 + unsigned char top_left)
1.24 +{
1.25 + int i, r, c;
1.26 + B_PREDICTION_MODE b_mode = (B_PREDICTION_MODE)_b_mode;
1.27 + unsigned char Left[4];
1.28 + Left[0] = yleft[0];
1.29 + Left[1] = yleft[left_stride];
1.30 + Left[2] = yleft[2 * left_stride];
1.31 + Left[3] = yleft[3 * left_stride];
1.32 +
1.33 + switch (b_mode)
1.34 + {
1.35 + case B_DC_PRED:
1.36 + {
1.37 + int expected_dc = 0;
1.38 +
1.39 + for (i = 0; i < 4; i++)
1.40 + {
1.41 + expected_dc += Above[i];
1.42 + expected_dc += Left[i];
1.43 + }
1.44 +
1.45 + expected_dc = (expected_dc + 4) >> 3;
1.46 +
1.47 + for (r = 0; r < 4; r++)
1.48 + {
1.49 + for (c = 0; c < 4; c++)
1.50 + {
1.51 + dst[c] = expected_dc;
1.52 + }
1.53 +
1.54 + dst += dst_stride;
1.55 + }
1.56 + }
1.57 + break;
1.58 + case B_TM_PRED:
1.59 + {
1.60 + /* prediction similar to true_motion prediction */
1.61 + for (r = 0; r < 4; r++)
1.62 + {
1.63 + for (c = 0; c < 4; c++)
1.64 + {
1.65 + int pred = Above[c] - top_left + Left[r];
1.66 +
1.67 + if (pred < 0)
1.68 + pred = 0;
1.69 +
1.70 + if (pred > 255)
1.71 + pred = 255;
1.72 +
1.73 + dst[c] = pred;
1.74 + }
1.75 +
1.76 + dst += dst_stride;
1.77 + }
1.78 + }
1.79 + break;
1.80 +
1.81 + case B_VE_PRED:
1.82 + {
1.83 +
1.84 + unsigned int ap[4];
1.85 + ap[0] = (top_left + 2 * Above[0] + Above[1] + 2) >> 2;
1.86 + ap[1] = (Above[0] + 2 * Above[1] + Above[2] + 2) >> 2;
1.87 + ap[2] = (Above[1] + 2 * Above[2] + Above[3] + 2) >> 2;
1.88 + ap[3] = (Above[2] + 2 * Above[3] + Above[4] + 2) >> 2;
1.89 +
1.90 + for (r = 0; r < 4; r++)
1.91 + {
1.92 + for (c = 0; c < 4; c++)
1.93 + {
1.94 +
1.95 + dst[c] = ap[c];
1.96 + }
1.97 +
1.98 + dst += dst_stride;
1.99 + }
1.100 +
1.101 + }
1.102 + break;
1.103 +
1.104 +
1.105 + case B_HE_PRED:
1.106 + {
1.107 +
1.108 + unsigned int lp[4];
1.109 + lp[0] = (top_left + 2 * Left[0] + Left[1] + 2) >> 2;
1.110 + lp[1] = (Left[0] + 2 * Left[1] + Left[2] + 2) >> 2;
1.111 + lp[2] = (Left[1] + 2 * Left[2] + Left[3] + 2) >> 2;
1.112 + lp[3] = (Left[2] + 2 * Left[3] + Left[3] + 2) >> 2;
1.113 +
1.114 + for (r = 0; r < 4; r++)
1.115 + {
1.116 + for (c = 0; c < 4; c++)
1.117 + {
1.118 + dst[c] = lp[r];
1.119 + }
1.120 +
1.121 + dst += dst_stride;
1.122 + }
1.123 + }
1.124 + break;
1.125 + case B_LD_PRED:
1.126 + {
1.127 + unsigned char *ptr = Above;
1.128 + dst[0 * dst_stride + 0] = (ptr[0] + ptr[1] * 2 + ptr[2] + 2) >> 2;
1.129 + dst[0 * dst_stride + 1] =
1.130 + dst[1 * dst_stride + 0] = (ptr[1] + ptr[2] * 2 + ptr[3] + 2) >> 2;
1.131 + dst[0 * dst_stride + 2] =
1.132 + dst[1 * dst_stride + 1] =
1.133 + dst[2 * dst_stride + 0] = (ptr[2] + ptr[3] * 2 + ptr[4] + 2) >> 2;
1.134 + dst[0 * dst_stride + 3] =
1.135 + dst[1 * dst_stride + 2] =
1.136 + dst[2 * dst_stride + 1] =
1.137 + dst[3 * dst_stride + 0] = (ptr[3] + ptr[4] * 2 + ptr[5] + 2) >> 2;
1.138 + dst[1 * dst_stride + 3] =
1.139 + dst[2 * dst_stride + 2] =
1.140 + dst[3 * dst_stride + 1] = (ptr[4] + ptr[5] * 2 + ptr[6] + 2) >> 2;
1.141 + dst[2 * dst_stride + 3] =
1.142 + dst[3 * dst_stride + 2] = (ptr[5] + ptr[6] * 2 + ptr[7] + 2) >> 2;
1.143 + dst[3 * dst_stride + 3] = (ptr[6] + ptr[7] * 2 + ptr[7] + 2) >> 2;
1.144 +
1.145 + }
1.146 + break;
1.147 + case B_RD_PRED:
1.148 + {
1.149 +
1.150 + unsigned char pp[9];
1.151 +
1.152 + pp[0] = Left[3];
1.153 + pp[1] = Left[2];
1.154 + pp[2] = Left[1];
1.155 + pp[3] = Left[0];
1.156 + pp[4] = top_left;
1.157 + pp[5] = Above[0];
1.158 + pp[6] = Above[1];
1.159 + pp[7] = Above[2];
1.160 + pp[8] = Above[3];
1.161 +
1.162 + dst[3 * dst_stride + 0] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2;
1.163 + dst[3 * dst_stride + 1] =
1.164 + dst[2 * dst_stride + 0] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2;
1.165 + dst[3 * dst_stride + 2] =
1.166 + dst[2 * dst_stride + 1] =
1.167 + dst[1 * dst_stride + 0] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2;
1.168 + dst[3 * dst_stride + 3] =
1.169 + dst[2 * dst_stride + 2] =
1.170 + dst[1 * dst_stride + 1] =
1.171 + dst[0 * dst_stride + 0] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2;
1.172 + dst[2 * dst_stride + 3] =
1.173 + dst[1 * dst_stride + 2] =
1.174 + dst[0 * dst_stride + 1] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2;
1.175 + dst[1 * dst_stride + 3] =
1.176 + dst[0 * dst_stride + 2] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2;
1.177 + dst[0 * dst_stride + 3] = (pp[6] + pp[7] * 2 + pp[8] + 2) >> 2;
1.178 +
1.179 + }
1.180 + break;
1.181 + case B_VR_PRED:
1.182 + {
1.183 +
1.184 + unsigned char pp[9];
1.185 +
1.186 + pp[0] = Left[3];
1.187 + pp[1] = Left[2];
1.188 + pp[2] = Left[1];
1.189 + pp[3] = Left[0];
1.190 + pp[4] = top_left;
1.191 + pp[5] = Above[0];
1.192 + pp[6] = Above[1];
1.193 + pp[7] = Above[2];
1.194 + pp[8] = Above[3];
1.195 +
1.196 +
1.197 + dst[3 * dst_stride + 0] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2;
1.198 + dst[2 * dst_stride + 0] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2;
1.199 + dst[3 * dst_stride + 1] =
1.200 + dst[1 * dst_stride + 0] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2;
1.201 + dst[2 * dst_stride + 1] =
1.202 + dst[0 * dst_stride + 0] = (pp[4] + pp[5] + 1) >> 1;
1.203 + dst[3 * dst_stride + 2] =
1.204 + dst[1 * dst_stride + 1] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2;
1.205 + dst[2 * dst_stride + 2] =
1.206 + dst[0 * dst_stride + 1] = (pp[5] + pp[6] + 1) >> 1;
1.207 + dst[3 * dst_stride + 3] =
1.208 + dst[1 * dst_stride + 2] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2;
1.209 + dst[2 * dst_stride + 3] =
1.210 + dst[0 * dst_stride + 2] = (pp[6] + pp[7] + 1) >> 1;
1.211 + dst[1 * dst_stride + 3] = (pp[6] + pp[7] * 2 + pp[8] + 2) >> 2;
1.212 + dst[0 * dst_stride + 3] = (pp[7] + pp[8] + 1) >> 1;
1.213 +
1.214 + }
1.215 + break;
1.216 + case B_VL_PRED:
1.217 + {
1.218 +
1.219 + unsigned char *pp = Above;
1.220 +
1.221 + dst[0 * dst_stride + 0] = (pp[0] + pp[1] + 1) >> 1;
1.222 + dst[1 * dst_stride + 0] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2;
1.223 + dst[2 * dst_stride + 0] =
1.224 + dst[0 * dst_stride + 1] = (pp[1] + pp[2] + 1) >> 1;
1.225 + dst[1 * dst_stride + 1] =
1.226 + dst[3 * dst_stride + 0] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2;
1.227 + dst[2 * dst_stride + 1] =
1.228 + dst[0 * dst_stride + 2] = (pp[2] + pp[3] + 1) >> 1;
1.229 + dst[3 * dst_stride + 1] =
1.230 + dst[1 * dst_stride + 2] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2;
1.231 + dst[0 * dst_stride + 3] =
1.232 + dst[2 * dst_stride + 2] = (pp[3] + pp[4] + 1) >> 1;
1.233 + dst[1 * dst_stride + 3] =
1.234 + dst[3 * dst_stride + 2] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2;
1.235 + dst[2 * dst_stride + 3] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2;
1.236 + dst[3 * dst_stride + 3] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2;
1.237 + }
1.238 + break;
1.239 +
1.240 + case B_HD_PRED:
1.241 + {
1.242 + unsigned char pp[9];
1.243 + pp[0] = Left[3];
1.244 + pp[1] = Left[2];
1.245 + pp[2] = Left[1];
1.246 + pp[3] = Left[0];
1.247 + pp[4] = top_left;
1.248 + pp[5] = Above[0];
1.249 + pp[6] = Above[1];
1.250 + pp[7] = Above[2];
1.251 + pp[8] = Above[3];
1.252 +
1.253 +
1.254 + dst[3 * dst_stride + 0] = (pp[0] + pp[1] + 1) >> 1;
1.255 + dst[3 * dst_stride + 1] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2;
1.256 + dst[2 * dst_stride + 0] =
1.257 + dst[3 * dst_stride + 2] = (pp[1] + pp[2] + 1) >> 1;
1.258 + dst[2 * dst_stride + 1] =
1.259 + dst[3 * dst_stride + 3] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2;
1.260 + dst[2 * dst_stride + 2] =
1.261 + dst[1 * dst_stride + 0] = (pp[2] + pp[3] + 1) >> 1;
1.262 + dst[2 * dst_stride + 3] =
1.263 + dst[1 * dst_stride + 1] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2;
1.264 + dst[1 * dst_stride + 2] =
1.265 + dst[0 * dst_stride + 0] = (pp[3] + pp[4] + 1) >> 1;
1.266 + dst[1 * dst_stride + 3] =
1.267 + dst[0 * dst_stride + 1] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2;
1.268 + dst[0 * dst_stride + 2] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2;
1.269 + dst[0 * dst_stride + 3] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2;
1.270 + }
1.271 + break;
1.272 +
1.273 +
1.274 + case B_HU_PRED:
1.275 + {
1.276 + unsigned char *pp = Left;
1.277 + dst[0 * dst_stride + 0] = (pp[0] + pp[1] + 1) >> 1;
1.278 + dst[0 * dst_stride + 1] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2;
1.279 + dst[0 * dst_stride + 2] =
1.280 + dst[1 * dst_stride + 0] = (pp[1] + pp[2] + 1) >> 1;
1.281 + dst[0 * dst_stride + 3] =
1.282 + dst[1 * dst_stride + 1] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2;
1.283 + dst[1 * dst_stride + 2] =
1.284 + dst[2 * dst_stride + 0] = (pp[2] + pp[3] + 1) >> 1;
1.285 + dst[1 * dst_stride + 3] =
1.286 + dst[2 * dst_stride + 1] = (pp[2] + pp[3] * 2 + pp[3] + 2) >> 2;
1.287 + dst[2 * dst_stride + 2] =
1.288 + dst[2 * dst_stride + 3] =
1.289 + dst[3 * dst_stride + 0] =
1.290 + dst[3 * dst_stride + 1] =
1.291 + dst[3 * dst_stride + 2] =
1.292 + dst[3 * dst_stride + 3] = pp[3];
1.293 + }
1.294 + break;
1.295 +
1.296 + default:
1.297 + break;
1.298 +
1.299 + }
1.300 +}
