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 <stdio.h> 14 #include <string.h> 15 #include <assert.h> 16 #include "onyx_int.h" 17 #include "tokenize.h" 18 #include "vpx_mem/vpx_mem.h" 19 20 /* Global event counters used for accumulating statistics across several 21 compressions, then generating context.c = initial stats. */ 22 23 #ifdef ENTROPY_STATS 24 _int64 context_counters[BLOCK_TYPES] [COEF_BANDS] [PREV_COEF_CONTEXTS] [vp8_coef_tokens]; 25 #endif 26 void vp8_stuff_mb(VP8_COMP *cpi, MACROBLOCKD *x, TOKENEXTRA **t) ; 27 void vp8_fix_contexts(MACROBLOCKD *x); 28 29 static TOKENVALUE dct_value_tokens[DCT_MAX_VALUE*2]; 30 const TOKENVALUE *vp8_dct_value_tokens_ptr; 31 static int dct_value_cost[DCT_MAX_VALUE*2]; 32 const int *vp8_dct_value_cost_ptr; 33 #if 0 34 int skip_true_count = 0; 35 int skip_false_count = 0; 36 #endif 37 static void fill_value_tokens() 38 { 39 40 TOKENVALUE *const t = dct_value_tokens + DCT_MAX_VALUE; 41 vp8_extra_bit_struct *const e = vp8_extra_bits; 42 43 int i = -DCT_MAX_VALUE; 44 int sign = 1; 45 46 do 47 { 48 if (!i) 49 sign = 0; 50 51 { 52 const int a = sign ? -i : i; 53 int eb = sign; 54 55 if (a > 4) 56 { 57 int j = 4; 58 59 while (++j < 11 && e[j].base_val <= a) {} 60 61 t[i].Token = --j; 62 eb |= (a - e[j].base_val) << 1; 63 } 64 else 65 t[i].Token = a; 66 67 t[i].Extra = eb; 68 } 69 70 // initialize the cost for extra bits for all possible coefficient value. 71 { 72 int cost = 0; 73 vp8_extra_bit_struct *p = vp8_extra_bits + t[i].Token; 74 75 if (p->base_val) 76 { 77 const int extra = t[i].Extra; 78 const int Length = p->Len; 79 80 if (Length) 81 cost += vp8_treed_cost(p->tree, p->prob, extra >> 1, Length); 82 83 cost += vp8_cost_bit(vp8_prob_half, extra & 1); /* sign */ 84 dct_value_cost[i + DCT_MAX_VALUE] = cost; 85 } 86 87 } 88 89 } 90 while (++i < DCT_MAX_VALUE); 91 92 vp8_dct_value_tokens_ptr = dct_value_tokens + DCT_MAX_VALUE; 93 vp8_dct_value_cost_ptr = dct_value_cost + DCT_MAX_VALUE; 94 } 95 96 static void tokenize2nd_order_b 97 ( 98 const BLOCKD *const b, 99 TOKENEXTRA **tp, 100 const int type, /* which plane: 0=Y no DC, 1=Y2, 2=UV, 3=Y with DC */ 101 const FRAME_TYPE frametype, 102 ENTROPY_CONTEXT *a, 103 ENTROPY_CONTEXT *l, 104 VP8_COMP *cpi 105 ) 106 { 107 int pt; /* near block/prev token context index */ 108 int c = 0; /* start at DC */ 109 const int eob = b->eob; /* one beyond last nonzero coeff */ 110 TOKENEXTRA *t = *tp; /* store tokens starting here */ 111 int x; 112 const short *qcoeff_ptr = b->qcoeff; 113 VP8_COMBINEENTROPYCONTEXTS(pt, *a, *l); 114 115 do 116 { 117 const int band = vp8_coef_bands[c]; 118 119 if (c < eob) 120 { 121 int rc = vp8_default_zig_zag1d[c]; 122 const int v = qcoeff_ptr[rc]; 123 124 assert(-DCT_MAX_VALUE <= v && v < (DCT_MAX_VALUE)); 125 126 t->Extra = vp8_dct_value_tokens_ptr[v].Extra; 127 x = vp8_dct_value_tokens_ptr[v].Token; 128 } 129 else 130 x = DCT_EOB_TOKEN; 131 132 t->Token = x; 133 t->context_tree = cpi->common.fc.coef_probs [type] [band] [pt]; 134 135 t->skip_eob_node = pt == 0 && ((band > 0 && type > 0) || (band > 1 && type == 0)); 136 137 ++cpi->coef_counts [type] [band] [pt] [x]; 138 } 139 while (pt = vp8_prev_token_class[x], ++t, c < eob && ++c < 16); 140 141 *tp = t; 142 pt = (c != !type); /* 0 <-> all coeff data is zero */ 143 *a = *l = pt; 144 145 } 146 147 static void tokenize1st_order_b 148 ( 149 const BLOCKD *const b, 150 TOKENEXTRA **tp, 151 const int type, /* which plane: 0=Y no DC, 1=Y2, 2=UV, 3=Y with DC */ 152 const FRAME_TYPE frametype, 153 ENTROPY_CONTEXT *a, 154 ENTROPY_CONTEXT *l, 155 VP8_COMP *cpi 156 ) 157 { 158 int pt; /* near block/prev token context index */ 159 int c = type ? 0 : 1; /* start at DC unless type 0 */ 160 const int eob = b->eob; /* one beyond last nonzero coeff */ 161 TOKENEXTRA *t = *tp; /* store tokens starting here */ 162 int x; 163 const short *qcoeff_ptr = b->qcoeff; 164 VP8_COMBINEENTROPYCONTEXTS(pt, *a, *l); 165 166 do 167 { 168 const int band = vp8_coef_bands[c]; 169 170 x = DCT_EOB_TOKEN; 171 172 if (c < eob) 173 { 174 int rc = vp8_default_zig_zag1d[c]; 175 const int v = qcoeff_ptr[rc]; 176 177 assert(-DCT_MAX_VALUE <= v && v < (DCT_MAX_VALUE)); 178 179 t->Extra = vp8_dct_value_tokens_ptr[v].Extra; 180 x = vp8_dct_value_tokens_ptr[v].Token; 181 } 182 183 t->Token = x; 184 t->context_tree = cpi->common.fc.coef_probs [type] [band] [pt]; 185 186 t->skip_eob_node = pt == 0 && ((band > 0 && type > 0) || (band > 1 && type == 0)); 187 188 ++cpi->coef_counts [type] [band] [pt] [x]; 189 } 190 while (pt = vp8_prev_token_class[x], ++t, c < eob && ++c < 16); 191 192 *tp = t; 193 pt = (c != !type); /* 0 <-> all coeff data is zero */ 194 *a = *l = pt; 195 196 } 197 198 199 static int mb_is_skippable(MACROBLOCKD *x) 200 { 201 int has_y2_block; 202 int skip = 1; 203 int i = 0; 204 205 has_y2_block = (x->mode_info_context->mbmi.mode != B_PRED 206 && x->mode_info_context->mbmi.mode != SPLITMV); 207 if (has_y2_block) 208 { 209 for (i = 0; i < 16; i++) 210 skip &= (x->block[i].eob < 2); 211 } 212 213 for (; i < 24 + has_y2_block; i++) 214 skip &= (!x->block[i].eob); 215 216 return skip; 217 } 218 219 220 void vp8_tokenize_mb(VP8_COMP *cpi, MACROBLOCKD *x, TOKENEXTRA **t) 221 { 222 ENTROPY_CONTEXT * A = (ENTROPY_CONTEXT *)x->above_context; 223 ENTROPY_CONTEXT * L = (ENTROPY_CONTEXT *)x->left_context; 224 int plane_type; 225 int b; 226 227 TOKENEXTRA *start = *t; 228 TOKENEXTRA *tp = *t; 229 230 x->mode_info_context->mbmi.dc_diff = 1; 231 232 #if 0 233 234 if (x->mbmi.force_no_skip) 235 { 236 x->mbmi.mb_skip_coeff = 1; 237 //reset for next_mb. 238 x->mbmi.force_no_skip = 0; 239 } 240 241 #endif 242 243 #if 1 244 245 x->mode_info_context->mbmi.mb_skip_coeff = mb_is_skippable(x); 246 if (x->mode_info_context->mbmi.mb_skip_coeff) 247 { 248 249 cpi->skip_true_count++; 250 251 if (!cpi->common.mb_no_coeff_skip) 252 vp8_stuff_mb(cpi, x, t) ; 253 else 254 { 255 vp8_fix_contexts(x); 256 } 257 258 if (x->mode_info_context->mbmi.mode != B_PRED && x->mode_info_context->mbmi.mode != SPLITMV) 259 x->mode_info_context->mbmi.dc_diff = 0; 260 else 261 x->mode_info_context->mbmi.dc_diff = 1; 262 263 264 return; 265 } 266 267 cpi->skip_false_count++; 268 #endif 269 #if 0 270 vpx_memcpy(cpi->coef_counts_backup, cpi->coef_counts, sizeof(cpi->coef_counts)); 271 #endif 272 273 if (x->mode_info_context->mbmi.mode == B_PRED || x->mode_info_context->mbmi.mode == SPLITMV) 274 { 275 plane_type = 3; 276 } 277 else 278 { 279 tokenize2nd_order_b(x->block + 24, t, 1, x->frame_type, 280 A + vp8_block2above[24], L + vp8_block2left[24], cpi); 281 plane_type = 0; 282 283 } 284 285 for (b = 0; b < 16; b++) 286 tokenize1st_order_b(x->block + b, t, plane_type, x->frame_type, 287 A + vp8_block2above[b], 288 L + vp8_block2left[b], cpi); 289 290 for (b = 16; b < 24; b++) 291 tokenize1st_order_b(x->block + b, t, 2, x->frame_type, 292 A + vp8_block2above[b], 293 L + vp8_block2left[b], cpi); 294 295 #if 0 296 297 if (cpi->common.mb_no_coeff_skip) 298 { 299 int skip = 1; 300 301 while ((tp != *t) && skip) 302 { 303 skip = (skip && (tp->Token == DCT_EOB_TOKEN)); 304 tp ++; 305 } 306 307 if (skip != x->mbmi.mb_skip_coeff) 308 skip += 0; 309 310 x->mbmi.mb_skip_coeff = skip; 311 312 if (x->mbmi.mb_skip_coeff == 1) 313 { 314 x->mbmi.dc_diff = 0; 315 //redo the coutnts 316 vpx_memcpy(cpi->coef_counts, cpi->coef_counts_backup, sizeof(cpi->coef_counts)); 317 318 *t = start; 319 cpi->skip_true_count++; 320 //skip_true_count++; 321 } 322 else 323 { 324 325 cpi->skip_false_count++; 326 //skip_false_count++; 327 } 328 } 329 330 #endif 331 } 332 333 334 #ifdef ENTROPY_STATS 335 336 void init_context_counters(void) 337 { 338 vpx_memset(context_counters, 0, sizeof(context_counters)); 339 } 340 341 void print_context_counters() 342 { 343 344 int type, band, pt, t; 345 346 FILE *const f = fopen("context.c", "w"); 347 348 fprintf(f, "#include \"entropy.h\"\n"); 349 350 fprintf(f, "\n/* *** GENERATED FILE: DO NOT EDIT *** */\n\n"); 351 352 fprintf(f, "int Contexts[BLOCK_TYPES] [COEF_BANDS] [PREV_COEF_CONTEXTS] [vp8_coef_tokens];\n\n"); 353 354 fprintf(f, "const int default_contexts[BLOCK_TYPES] [COEF_BANDS] [PREV_COEF_CONTEXTS] [vp8_coef_tokens] = {"); 355 356 # define Comma( X) (X? ",":"") 357 358 type = 0; 359 360 do 361 { 362 fprintf(f, "%s\n { /* block Type %d */", Comma(type), type); 363 364 band = 0; 365 366 do 367 { 368 fprintf(f, "%s\n { /* Coeff Band %d */", Comma(band), band); 369 370 pt = 0; 371 372 do 373 { 374 fprintf(f, "%s\n {", Comma(pt)); 375 376 t = 0; 377 378 do 379 { 380 const _int64 x = context_counters [type] [band] [pt] [t]; 381 const int y = (int) x; 382 383 assert(x == (_int64) y); /* no overflow handling yet */ 384 fprintf(f, "%s %d", Comma(t), y); 385 386 } 387 while (++t < vp8_coef_tokens); 388 389 fprintf(f, "}"); 390 } 391 while (++pt < PREV_COEF_CONTEXTS); 392 393 fprintf(f, "\n }"); 394 395 } 396 while (++band < COEF_BANDS); 397 398 fprintf(f, "\n }"); 399 } 400 while (++type < BLOCK_TYPES); 401 402 fprintf(f, "\n};\n"); 403 fclose(f); 404 } 405 #endif 406 407 408 void vp8_tokenize_initialize() 409 { 410 fill_value_tokens(); 411 } 412 413 414 static __inline void stuff2nd_order_b 415 ( 416 const BLOCKD *const b, 417 TOKENEXTRA **tp, 418 const int type, /* which plane: 0=Y no DC, 1=Y2, 2=UV, 3=Y with DC */ 419 const FRAME_TYPE frametype, 420 ENTROPY_CONTEXT *a, 421 ENTROPY_CONTEXT *l, 422 VP8_COMP *cpi 423 ) 424 { 425 int pt; /* near block/prev token context index */ 426 TOKENEXTRA *t = *tp; /* store tokens starting here */ 427 VP8_COMBINEENTROPYCONTEXTS(pt, *a, *l); 428 (void) frametype; 429 (void) type; 430 (void) b; 431 432 t->Token = DCT_EOB_TOKEN; 433 t->context_tree = cpi->common.fc.coef_probs [1] [0] [pt]; 434 t->skip_eob_node = 0; 435 ++cpi->coef_counts [1] [0] [pt] [DCT_EOB_TOKEN]; 436 ++t; 437 438 *tp = t; 439 pt = 0; 440 *a = *l = pt; 441 442 } 443 444 static __inline void stuff1st_order_b 445 ( 446 const BLOCKD *const b, 447 TOKENEXTRA **tp, 448 const int type, /* which plane: 0=Y no DC, 1=Y2, 2=UV, 3=Y with DC */ 449 const FRAME_TYPE frametype, 450 ENTROPY_CONTEXT *a, 451 ENTROPY_CONTEXT *l, 452 VP8_COMP *cpi 453 ) 454 { 455 int pt; /* near block/prev token context index */ 456 TOKENEXTRA *t = *tp; /* store tokens starting here */ 457 VP8_COMBINEENTROPYCONTEXTS(pt, *a, *l); 458 (void) frametype; 459 (void) type; 460 (void) b; 461 462 t->Token = DCT_EOB_TOKEN; 463 t->context_tree = cpi->common.fc.coef_probs [0] [1] [pt]; 464 t->skip_eob_node = 0; 465 ++cpi->coef_counts [0] [1] [pt] [DCT_EOB_TOKEN]; 466 ++t; 467 *tp = t; 468 pt = 0; /* 0 <-> all coeff data is zero */ 469 *a = *l = pt; 470 471 } 472 static __inline 473 void stuff1st_order_buv 474 ( 475 const BLOCKD *const b, 476 TOKENEXTRA **tp, 477 const int type, /* which plane: 0=Y no DC, 1=Y2, 2=UV, 3=Y with DC */ 478 const FRAME_TYPE frametype, 479 ENTROPY_CONTEXT *a, 480 ENTROPY_CONTEXT *l, 481 VP8_COMP *cpi 482 ) 483 { 484 int pt; /* near block/prev token context index */ 485 TOKENEXTRA *t = *tp; /* store tokens starting here */ 486 VP8_COMBINEENTROPYCONTEXTS(pt, *a, *l); 487 (void) frametype; 488 (void) type; 489 (void) b; 490 491 t->Token = DCT_EOB_TOKEN; 492 t->context_tree = cpi->common.fc.coef_probs [2] [0] [pt]; 493 t->skip_eob_node = 0; 494 ++cpi->coef_counts[2] [0] [pt] [DCT_EOB_TOKEN]; 495 ++t; 496 *tp = t; 497 pt = 0; /* 0 <-> all coeff data is zero */ 498 *a = *l = pt; 499 500 } 501 502 void vp8_stuff_mb(VP8_COMP *cpi, MACROBLOCKD *x, TOKENEXTRA **t) 503 { 504 ENTROPY_CONTEXT * A = (ENTROPY_CONTEXT *)x->above_context; 505 ENTROPY_CONTEXT * L = (ENTROPY_CONTEXT *)x->left_context; 506 int plane_type; 507 int b; 508 509 stuff2nd_order_b(x->block + 24, t, 1, x->frame_type, 510 A + vp8_block2above[24], L + vp8_block2left[24], cpi); 511 plane_type = 0; 512 513 514 if (x->mode_info_context->mbmi.mode != B_PRED && x->mode_info_context->mbmi.mode != SPLITMV) 515 x->mode_info_context->mbmi.dc_diff = 0; 516 else 517 x->mode_info_context->mbmi.dc_diff = 1; 518 519 520 for (b = 0; b < 16; b++) 521 stuff1st_order_b(x->block + b, t, plane_type, x->frame_type, 522 A + vp8_block2above[b], 523 L + vp8_block2left[b], cpi); 524 525 for (b = 16; b < 24; b++) 526 stuff1st_order_buv(x->block + b, t, 2, x->frame_type, 527 A + vp8_block2above[b], 528 L + vp8_block2left[b], cpi); 529 530 } 531 void vp8_fix_contexts(MACROBLOCKD *x) 532 { 533 /* Clear entropy contexts for Y2 blocks */ 534 if (x->mode_info_context->mbmi.mode != B_PRED && x->mode_info_context->mbmi.mode != SPLITMV) 535 { 536 vpx_memset(x->above_context, 0, sizeof(ENTROPY_CONTEXT_PLANES)); 537 vpx_memset(x->left_context, 0, sizeof(ENTROPY_CONTEXT_PLANES)); 538 } 539 else 540 { 541 vpx_memset(x->above_context, 0, sizeof(ENTROPY_CONTEXT_PLANES)-1); 542 vpx_memset(x->left_context, 0, sizeof(ENTROPY_CONTEXT_PLANES)-1); 543 } 544 545 } 546
