pp_semaphore_luma.cpp revision 3306cfee3bf38ab207a0504e49c2d492bb73ffbf
1/* ------------------------------------------------------------------ 2 * Copyright (C) 1998-2009 PacketVideo 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 13 * express or implied. 14 * See the License for the specific language governing permissions 15 * and limitations under the License. 16 * ------------------------------------------------------------------- 17 */ 18/* 19------------------------------------------------------------------------------ 20 INPUT AND OUTPUT DEFINITIONS 21 22 Inputs: 23 xpred = x-axis coordinate of the MB used for prediction (int) 24 ypred = y-axis coordinate of the MB used for prediction (int) 25 pp_dec_y = pointer to the post processing semaphore for current 26 luminance frame (uint8) 27 pstprcTypPrv = pointer the previous frame's post processing type 28 (uint8) 29 ll = pointer to the buffer (int) 30 mv_loc = flag indicating location of the motion compensated 31 (x,y) position with respect to the luminance MB (int); 32 0 -> inside MB, 1 -> outside MB 33 dx = horizontal component of the motion vector (int) 34 dy = vertical component of the motion vector (int) 35 mvwidth = number of blocks per row (int) 36 width = luminance VOP width in pixels (int) 37 height = luminance VOP height in pixels (int) 38 39 Local Stores/Buffers/Pointers Needed: 40 None 41 42 Global Stores/Buffers/Pointers Needed: 43 None 44 45 Outputs: 46 msk_deblock = flag that indicates whether deblocking is to be 47 performed (msk_deblock = 0) or not (msk_deblock = 48 1) (uint8) 49 50 Pointers and Buffers Modified: 51 pp_dec_y contents are the updated semapohore propagation data 52 53 Local Stores Modified: 54 None 55 56 Global Stores Modified: 57 None 58 59------------------------------------------------------------------------------ 60 FUNCTION DESCRIPTION 61 62 This functions performs post processing semaphore propagation processing 63 after luminance prediction. 64 65*/ 66 67 68/*---------------------------------------------------------------------------- 69; INCLUDES 70----------------------------------------------------------------------------*/ 71#include "mp4dec_api.h" 72#include "mp4def.h" 73 74/*---------------------------------------------------------------------------- 75; MACROS 76; Define module specific macros here 77----------------------------------------------------------------------------*/ 78 79/*---------------------------------------------------------------------------- 80; DEFINES 81; Include all pre-processor statements here. Include conditional 82; compile variables also. 83----------------------------------------------------------------------------*/ 84 85/*---------------------------------------------------------------------------- 86; LOCAL FUNCTION DEFINITIONS 87; Function Prototype declaration 88----------------------------------------------------------------------------*/ 89 90/*---------------------------------------------------------------------------- 91; LOCAL STORE/BUFFER/POINTER DEFINITIONS 92; Variable declaration - defined here and used outside this module 93----------------------------------------------------------------------------*/ 94 95/*---------------------------------------------------------------------------- 96; EXTERNAL FUNCTION REFERENCES 97; Declare functions defined elsewhere and referenced in this module 98----------------------------------------------------------------------------*/ 99 100/*---------------------------------------------------------------------------- 101; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES 102; Declare variables used in this module but defined elsewhere 103----------------------------------------------------------------------------*/ 104#ifdef PV_POSTPROC_ON 105#ifdef __cplusplus 106extern "C" 107{ 108#endif 109 /*---------------------------------------------------------------------------- 110 ; FUNCTION CODE 111 ----------------------------------------------------------------------------*/ 112 uint8 pp_semaphore_luma( 113 int xpred, /* i */ 114 int ypred, /* i */ 115 uint8 *pp_dec_y, /* i/o */ 116 uint8 *pstprcTypPrv, /* i */ 117 int *ll, /* i */ 118 int *mv_loc, /* i/o */ 119 int dx, /* i */ 120 int dy, /* i */ 121 int mvwidth, /* i */ 122 int width, /* i */ 123 int height /* i */ 124 ) 125 { 126 /*---------------------------------------------------------------------------- 127 ; Define all local variables 128 ----------------------------------------------------------------------------*/ 129 int kk, mmvy, mmvx, nmvx, nmvy; 130 uint8 *pp_prev1, *pp_prev2, *pp_prev3, *pp_prev4; 131 uint8 msk_deblock = 0; /* 11/3/00 */ 132 133 /*---------------------------------------------------------------------------- 134 ; Function body here 135 ----------------------------------------------------------------------------*/ 136 /* Interframe Processing - 1 MV per MB */ 137 138 /* check whether the MV points outside the frame */ 139 if (xpred >= 0 && xpred <= ((width << 1) - (2*MB_SIZE)) && ypred >= 0 && 140 ypred <= ((height << 1) - (2*MB_SIZE))) 141 { /*****************************/ 142 /* (x,y) is inside the frame */ 143 /*****************************/ 144 145 /* 10/24/2000 post_processing semaphore */ 146 /* generation */ 147 148 /* 10/23/2000 no boundary checking*/ 149 *mv_loc = 0; 150 151 /* Calculate block x coordinate. Divide by 16 is for */ 152 /* converting half-pixel resolution to block */ 153 mmvx = xpred >> 4; 154 155 /* Calculate block y coordinate. Divide by 16 is for */ 156 /* converting half-pixel resolution to block */ 157 mmvy = ypred >> 4; 158 159 /* Find post processing semaphore location for block */ 160 /* used for prediction, i.e., */ 161 /* pp_prev1 = &pstprcTypPrv[mmvy*mvwidth][mmvx] */ 162 pp_prev1 = pstprcTypPrv + mmvx + mmvy * mvwidth; 163 164 /* Check if MV is a multiple of 16 */ 165 if ((dx&0xF) != 0) 166 { /* dx is not a multiple of 16 */ 167 168 /* pp_prev2 is the block to the right of */ 169 /* pp_prev1 block */ 170 pp_prev2 = pp_prev1 + 1; 171 172 if ((dy&0xF) != 0) 173 { /* dy is not a multiple of 16 */ 174 175 /* pp_prev3 is the block below */ 176 /* pp_prev1 block */ 177 pp_prev3 = pp_prev1 + mvwidth; 178 } 179 else 180 { /* dy is a multiple of 16 */ 181 182 pp_prev3 = pp_prev1; 183 } 184 185 /* pp_prev4 is the block to the right of */ 186 /* pp_prev3 block. */ 187 pp_prev4 = pp_prev3 + 1; 188 } 189 else 190 { /* dx is a multiple of 16 */ 191 192 pp_prev2 = pp_prev1; 193 194 if ((dy&0xF) != 0) 195 { /* dy is not a multiple of 16 */ 196 197 /* pp_prev3 is the block below */ 198 /* pp_prev1 block. */ 199 pp_prev3 = pp_prev1 + mvwidth; 200 } 201 else 202 { /* dy is a multiple of 16 */ 203 204 pp_prev3 = pp_prev1; 205 msk_deblock = 0x3; 206 } 207 208 pp_prev4 = pp_prev3; 209 } 210 211 /* Perform post processing semaphore propagation for each */ 212 /* of the 4 blocks in a MB. */ 213 for (kk = 0; kk < 4; kk++) 214 { 215 /* Deringing semaphore propagation */ 216 if ((*(pp_dec_y) & 4) == 0) 217 { 218 *(pp_dec_y) |= ((*(pp_prev1) | *(pp_prev2) | 219 *(pp_prev3) | *(pp_prev4)) & 0x4); 220 } 221 /* Deblocking semaphore propagation */ 222 /* 11/3/00, change the propagation for deblocking */ 223 if (msk_deblock == 0) 224 { 225 *(pp_dec_y) = 0; 226 } 227 228 pp_dec_y += ll[kk]; 229 pp_prev1 += ll[kk]; 230 pp_prev2 += ll[kk]; 231 pp_prev3 += ll[kk]; 232 pp_prev4 += ll[kk]; 233 } 234 235 } 236 else 237 { /******************************/ 238 /* (x,y) is outside the frame */ 239 /******************************/ 240 241 /* 10/24/2000 post_processing semaphore */ 242 /* generation */ 243 244 /* 10/23/2000 boundary checking*/ 245 *mv_loc = 1; 246 247 /* Perform post processing semaphore propagation for each */ 248 /* of the 4 blocks in a MB. */ 249 for (kk = 0; kk < 4; kk++) 250 { 251 /* Calculate block x coordinate and round (?). */ 252 /* Divide by 16 is for converting half-pixel */ 253 /* resolution to block. */ 254 mmvx = (xpred + ((kk & 1) << 3)) >> 4; 255 nmvx = mmvx; 256 257 /* Calculate block y coordinate and round (?). */ 258 /* Divide by 16 is for converting half-pixel */ 259 /* resolution to block. */ 260 mmvy = (ypred + ((kk & 2) << 2)) >> 4; 261 nmvy = mmvy; 262 263 /* Perform boundary checking */ 264 if (nmvx < 0) 265 { 266 nmvx = 0; 267 } 268 else if (nmvx > mvwidth - 1) 269 { 270 nmvx = mvwidth - 1; 271 } 272 273 if (nmvy < 0) 274 { 275 nmvy = 0; 276 } 277 else if (nmvy > (height >> 3) - 1) 278 { 279 nmvy = (height >> 3) - 1; 280 } 281 282 /* Find post processing semaphore location for block */ 283 /* used for prediction, i.e., */ 284 /* pp_prev1 = &pstprcTypPrv[nmvy*mvwidth][nmvx] */ 285 pp_prev1 = pstprcTypPrv + nmvx + nmvy * mvwidth; 286 287 /* Check if x component of MV is a multiple of 16 */ 288 /* and check if block x coordinate is out of bounds */ 289 if (((dx&0xF) != 0) && (mmvx + 1 < mvwidth - 1)) 290 { /* dx is not a multiple of 16 and the block */ 291 /* x coordinate is within the bounds */ 292 293 /* pp_prev2 is the block to the right of */ 294 /* pp_prev1 block */ 295 pp_prev2 = pp_prev1 + 1; 296 297 /* Check if y component of MV is a multiple */ 298 /* of 16 and check if block y coordinate is */ 299 /* out of bounds */ 300 if (((dy&0xF) != 0) && (mmvy + 1 < (height >> 3) - 1)) 301 { /* dy is not a multiple of 16 and */ 302 /* the block y coordinate is */ 303 /* within the bounds */ 304 305 /* pp_prev3 is the block below */ 306 /* pp_prev1 block */ 307 pp_prev3 = pp_prev1 + mvwidth; 308 309 /* all prediction are from different blocks */ 310 msk_deblock = 0x3; 311 } 312 else 313 { /* dy is a multiple of 16 or the block */ 314 /* y coordinate is out of bounds */ 315 316 pp_prev3 = pp_prev1; 317 } 318 319 /* pp_prev4 is the block to the right of */ 320 /* pp_prev3 block. */ 321 pp_prev4 = pp_prev3 + 1; 322 } 323 else 324 { /* dx is a multiple of 16 or the block x */ 325 /* coordinate is out of bounds */ 326 327 pp_prev2 = pp_prev1; 328 329 /* Check if y component of MV is a multiple */ 330 /* of 16 and check if block y coordinate is */ 331 /* out of bounds */ 332 if (((dy&0xF) != 0) && (mmvy + 1 < (height >> 3) - 1)) 333 { /* dy is not a multiple of 16 and */ 334 /* the block y coordinate is */ 335 /* within the bounds */ 336 337 /* pp_prev3 is the block below */ 338 /* pp_prev1 block. */ 339 pp_prev3 = pp_prev1 + mvwidth; 340 } 341 else 342 { /* dy is a multiple of 16 or the block */ 343 /* y coordinate is out of bounds */ 344 345 pp_prev3 = pp_prev1; 346 } 347 348 pp_prev4 = pp_prev3; 349 } 350 351 /* Deringing semaphore propagation */ 352 if ((*(pp_dec_y)&4) == 0) 353 { 354 *(pp_dec_y) |= ((*(pp_prev1) | 355 *(pp_prev2) | *(pp_prev3) | 356 *(pp_prev4)) & 0x4); 357 } 358 /* Deblocking semaphore propagation */ 359 /* 11/3/00, change the propaga= */ 360 /* tion for deblocking */ 361 if (msk_deblock == 0) 362 { 363 *(pp_dec_y) = 0; 364 } 365 366 pp_dec_y += ll[kk]; 367 } 368 } 369 370 /*---------------------------------------------------------------------------- 371 ; Return nothing or data or data pointer 372 ----------------------------------------------------------------------------*/ 373 return (msk_deblock); 374 } 375#ifdef __cplusplus 376} 377#endif 378#endif 379