1/* 2 * RoQ Video Encoder. 3 * 4 * Copyright (C) 2007 Vitor Sessak <vitor1001@gmail.com> 5 * Copyright (C) 2004-2007 Eric Lasota 6 * Based on RoQ specs (C) 2001 Tim Ferguson 7 * 8 * This file is part of FFmpeg. 9 * 10 * FFmpeg is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU Lesser General Public 12 * License as published by the Free Software Foundation; either 13 * version 2.1 of the License, or (at your option) any later version. 14 * 15 * FFmpeg is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * Lesser General Public License for more details. 19 * 20 * You should have received a copy of the GNU Lesser General Public 21 * License along with FFmpeg; if not, write to the Free Software 22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 23 */ 24 25/** 26 * @file 27 * id RoQ encoder by Vitor. Based on the Switchblade3 library and the 28 * Switchblade3 FFmpeg glue by Eric Lasota. 29 */ 30 31/* 32 * COSTS: 33 * Level 1: 34 * SKIP - 2 bits 35 * MOTION - 2 + 8 bits 36 * CODEBOOK - 2 + 8 bits 37 * SUBDIVIDE - 2 + combined subcel cost 38 * 39 * Level 2: 40 * SKIP - 2 bits 41 * MOTION - 2 + 8 bits 42 * CODEBOOK - 2 + 8 bits 43 * SUBDIVIDE - 2 + 4*8 bits 44 * 45 * Maximum cost: 138 bits per cel 46 * 47 * Proper evaluation requires LCD fraction comparison, which requires 48 * Squared Error (SE) loss * savings increase 49 * 50 * Maximum savings increase: 136 bits 51 * Maximum SE loss without overflow: 31580641 52 * Components in 8x8 supercel: 192 53 * Maximum SE precision per component: 164482 54 * >65025, so no truncation is needed (phew) 55 */ 56 57#include <string.h> 58 59#include "libavutil/attributes.h" 60#include "libavutil/opt.h" 61#include "roqvideo.h" 62#include "bytestream.h" 63#include "elbg.h" 64#include "internal.h" 65#include "mathops.h" 66 67#define CHROMA_BIAS 1 68 69/** 70 * Maximum number of generated 4x4 codebooks. Can't be 256 to workaround a 71 * Quake 3 bug. 72 */ 73#define MAX_CBS_4x4 256 74 75#define MAX_CBS_2x2 256 ///< Maximum number of 2x2 codebooks. 76 77/* The cast is useful when multiplying it by INT_MAX */ 78#define ROQ_LAMBDA_SCALE ((uint64_t) FF_LAMBDA_SCALE) 79 80/* Macroblock support functions */ 81static void unpack_roq_cell(roq_cell *cell, uint8_t u[4*3]) 82{ 83 memcpy(u , cell->y, 4); 84 memset(u+4, cell->u, 4); 85 memset(u+8, cell->v, 4); 86} 87 88static void unpack_roq_qcell(uint8_t cb2[], roq_qcell *qcell, uint8_t u[4*4*3]) 89{ 90 int i,cp; 91 static const int offsets[4] = {0, 2, 8, 10}; 92 93 for (cp=0; cp<3; cp++) 94 for (i=0; i<4; i++) { 95 u[4*4*cp + offsets[i] ] = cb2[qcell->idx[i]*2*2*3 + 4*cp ]; 96 u[4*4*cp + offsets[i]+1] = cb2[qcell->idx[i]*2*2*3 + 4*cp+1]; 97 u[4*4*cp + offsets[i]+4] = cb2[qcell->idx[i]*2*2*3 + 4*cp+2]; 98 u[4*4*cp + offsets[i]+5] = cb2[qcell->idx[i]*2*2*3 + 4*cp+3]; 99 } 100} 101 102 103static void enlarge_roq_mb4(uint8_t base[3*16], uint8_t u[3*64]) 104{ 105 int x,y,cp; 106 107 for(cp=0; cp<3; cp++) 108 for(y=0; y<8; y++) 109 for(x=0; x<8; x++) 110 *u++ = base[(y/2)*4 + (x/2) + 16*cp]; 111} 112 113static inline int square(int x) 114{ 115 return x*x; 116} 117 118static inline int eval_sse(const uint8_t *a, const uint8_t *b, int count) 119{ 120 int diff=0; 121 122 while(count--) 123 diff += square(*b++ - *a++); 124 125 return diff; 126} 127 128// FIXME Could use DSPContext.sse, but it is not so speed critical (used 129// just for motion estimation). 130static int block_sse(uint8_t * const *buf1, uint8_t * const *buf2, int x1, int y1, 131 int x2, int y2, const int *stride1, const int *stride2, int size) 132{ 133 int i, k; 134 int sse=0; 135 136 for (k=0; k<3; k++) { 137 int bias = (k ? CHROMA_BIAS : 4); 138 for (i=0; i<size; i++) 139 sse += bias*eval_sse(buf1[k] + (y1+i)*stride1[k] + x1, 140 buf2[k] + (y2+i)*stride2[k] + x2, size); 141 } 142 143 return sse; 144} 145 146static int eval_motion_dist(RoqContext *enc, int x, int y, motion_vect vect, 147 int size) 148{ 149 int mx=vect.d[0]; 150 int my=vect.d[1]; 151 152 if (mx < -7 || mx > 7) 153 return INT_MAX; 154 155 if (my < -7 || my > 7) 156 return INT_MAX; 157 158 mx += x; 159 my += y; 160 161 if ((unsigned) mx > enc->width-size || (unsigned) my > enc->height-size) 162 return INT_MAX; 163 164 return block_sse(enc->frame_to_enc->data, enc->last_frame->data, x, y, 165 mx, my, 166 enc->frame_to_enc->linesize, enc->last_frame->linesize, 167 size); 168} 169 170/** 171 * @return distortion between two macroblocks 172 */ 173static inline int squared_diff_macroblock(uint8_t a[], uint8_t b[], int size) 174{ 175 int cp, sdiff=0; 176 177 for(cp=0;cp<3;cp++) { 178 int bias = (cp ? CHROMA_BIAS : 4); 179 sdiff += bias*eval_sse(a, b, size*size); 180 a += size*size; 181 b += size*size; 182 } 183 184 return sdiff; 185} 186 187typedef struct 188{ 189 int eval_dist[4]; 190 int best_bit_use; 191 int best_coding; 192 193 int subCels[4]; 194 motion_vect motion; 195 int cbEntry; 196} SubcelEvaluation; 197 198typedef struct 199{ 200 int eval_dist[4]; 201 int best_coding; 202 203 SubcelEvaluation subCels[4]; 204 205 motion_vect motion; 206 int cbEntry; 207 208 int sourceX, sourceY; 209} CelEvaluation; 210 211typedef struct 212{ 213 int numCB4; 214 int numCB2; 215 int usedCB2[MAX_CBS_2x2]; 216 int usedCB4[MAX_CBS_4x4]; 217 uint8_t unpacked_cb2[MAX_CBS_2x2*2*2*3]; 218 uint8_t unpacked_cb4[MAX_CBS_4x4*4*4*3]; 219 uint8_t unpacked_cb4_enlarged[MAX_CBS_4x4*8*8*3]; 220} RoqCodebooks; 221 222/** 223 * Temporary vars 224 */ 225typedef struct RoqTempData 226{ 227 CelEvaluation *cel_evals; 228 229 int f2i4[MAX_CBS_4x4]; 230 int i2f4[MAX_CBS_4x4]; 231 int f2i2[MAX_CBS_2x2]; 232 int i2f2[MAX_CBS_2x2]; 233 234 int mainChunkSize; 235 236 int numCB4; 237 int numCB2; 238 239 RoqCodebooks codebooks; 240 241 int *closest_cb2; 242 int used_option[4]; 243} RoqTempdata; 244 245/** 246 * Initialize cel evaluators and set their source coordinates 247 */ 248static void create_cel_evals(RoqContext *enc, RoqTempdata *tempData) 249{ 250 int n=0, x, y, i; 251 252 tempData->cel_evals = av_malloc_array(enc->width*enc->height/64, sizeof(CelEvaluation)); 253 254 /* Map to the ROQ quadtree order */ 255 for (y=0; y<enc->height; y+=16) 256 for (x=0; x<enc->width; x+=16) 257 for(i=0; i<4; i++) { 258 tempData->cel_evals[n ].sourceX = x + (i&1)*8; 259 tempData->cel_evals[n++].sourceY = y + (i&2)*4; 260 } 261} 262 263/** 264 * Get macroblocks from parts of the image 265 */ 266static void get_frame_mb(const AVFrame *frame, int x, int y, uint8_t mb[], int dim) 267{ 268 int i, j, cp; 269 270 for (cp=0; cp<3; cp++) { 271 int stride = frame->linesize[cp]; 272 for (i=0; i<dim; i++) 273 for (j=0; j<dim; j++) 274 *mb++ = frame->data[cp][(y+i)*stride + x + j]; 275 } 276} 277 278/** 279 * Find the codebook with the lowest distortion from an image 280 */ 281static int index_mb(uint8_t cluster[], uint8_t cb[], int numCB, 282 int *outIndex, int dim) 283{ 284 int i, lDiff = INT_MAX, pick=0; 285 286 /* Diff against the others */ 287 for (i=0; i<numCB; i++) { 288 int diff = squared_diff_macroblock(cluster, cb + i*dim*dim*3, dim); 289 if (diff < lDiff) { 290 lDiff = diff; 291 pick = i; 292 } 293 } 294 295 *outIndex = pick; 296 return lDiff; 297} 298 299#define EVAL_MOTION(MOTION) \ 300 do { \ 301 diff = eval_motion_dist(enc, j, i, MOTION, blocksize); \ 302 \ 303 if (diff < lowestdiff) { \ 304 lowestdiff = diff; \ 305 bestpick = MOTION; \ 306 } \ 307 } while(0) 308 309static void motion_search(RoqContext *enc, int blocksize) 310{ 311 static const motion_vect offsets[8] = { 312 {{ 0,-1}}, 313 {{ 0, 1}}, 314 {{-1, 0}}, 315 {{ 1, 0}}, 316 {{-1, 1}}, 317 {{ 1,-1}}, 318 {{-1,-1}}, 319 {{ 1, 1}}, 320 }; 321 322 int diff, lowestdiff, oldbest; 323 int off[3]; 324 motion_vect bestpick = {{0,0}}; 325 int i, j, k, offset; 326 327 motion_vect *last_motion; 328 motion_vect *this_motion; 329 motion_vect vect, vect2; 330 331 int max=(enc->width/blocksize)*enc->height/blocksize; 332 333 if (blocksize == 4) { 334 last_motion = enc->last_motion4; 335 this_motion = enc->this_motion4; 336 } else { 337 last_motion = enc->last_motion8; 338 this_motion = enc->this_motion8; 339 } 340 341 for (i=0; i<enc->height; i+=blocksize) 342 for (j=0; j<enc->width; j+=blocksize) { 343 lowestdiff = eval_motion_dist(enc, j, i, (motion_vect) {{0,0}}, 344 blocksize); 345 bestpick.d[0] = 0; 346 bestpick.d[1] = 0; 347 348 if (blocksize == 4) 349 EVAL_MOTION(enc->this_motion8[(i/8)*(enc->width/8) + j/8]); 350 351 offset = (i/blocksize)*enc->width/blocksize + j/blocksize; 352 if (offset < max && offset >= 0) 353 EVAL_MOTION(last_motion[offset]); 354 355 offset++; 356 if (offset < max && offset >= 0) 357 EVAL_MOTION(last_motion[offset]); 358 359 offset = (i/blocksize + 1)*enc->width/blocksize + j/blocksize; 360 if (offset < max && offset >= 0) 361 EVAL_MOTION(last_motion[offset]); 362 363 off[0]= (i/blocksize)*enc->width/blocksize + j/blocksize - 1; 364 off[1]= off[0] - enc->width/blocksize + 1; 365 off[2]= off[1] + 1; 366 367 if (i) { 368 369 for(k=0; k<2; k++) 370 vect.d[k]= mid_pred(this_motion[off[0]].d[k], 371 this_motion[off[1]].d[k], 372 this_motion[off[2]].d[k]); 373 374 EVAL_MOTION(vect); 375 for(k=0; k<3; k++) 376 EVAL_MOTION(this_motion[off[k]]); 377 } else if(j) 378 EVAL_MOTION(this_motion[off[0]]); 379 380 vect = bestpick; 381 382 oldbest = -1; 383 while (oldbest != lowestdiff) { 384 oldbest = lowestdiff; 385 for (k=0; k<8; k++) { 386 vect2 = vect; 387 vect2.d[0] += offsets[k].d[0]; 388 vect2.d[1] += offsets[k].d[1]; 389 EVAL_MOTION(vect2); 390 } 391 vect = bestpick; 392 } 393 offset = (i/blocksize)*enc->width/blocksize + j/blocksize; 394 this_motion[offset] = bestpick; 395 } 396} 397 398/** 399 * Get distortion for all options available to a subcel 400 */ 401static void gather_data_for_subcel(SubcelEvaluation *subcel, int x, 402 int y, RoqContext *enc, RoqTempdata *tempData) 403{ 404 uint8_t mb4[4*4*3]; 405 uint8_t mb2[2*2*3]; 406 int cluster_index; 407 int i, best_dist; 408 409 static const int bitsUsed[4] = {2, 10, 10, 34}; 410 411 if (enc->framesSinceKeyframe >= 1) { 412 subcel->motion = enc->this_motion4[y*enc->width/16 + x/4]; 413 414 subcel->eval_dist[RoQ_ID_FCC] = 415 eval_motion_dist(enc, x, y, 416 enc->this_motion4[y*enc->width/16 + x/4], 4); 417 } else 418 subcel->eval_dist[RoQ_ID_FCC] = INT_MAX; 419 420 if (enc->framesSinceKeyframe >= 2) 421 subcel->eval_dist[RoQ_ID_MOT] = block_sse(enc->frame_to_enc->data, 422 enc->current_frame->data, x, 423 y, x, y, 424 enc->frame_to_enc->linesize, 425 enc->current_frame->linesize, 426 4); 427 else 428 subcel->eval_dist[RoQ_ID_MOT] = INT_MAX; 429 430 cluster_index = y*enc->width/16 + x/4; 431 432 get_frame_mb(enc->frame_to_enc, x, y, mb4, 4); 433 434 subcel->eval_dist[RoQ_ID_SLD] = index_mb(mb4, 435 tempData->codebooks.unpacked_cb4, 436 tempData->codebooks.numCB4, 437 &subcel->cbEntry, 4); 438 439 subcel->eval_dist[RoQ_ID_CCC] = 0; 440 441 for(i=0;i<4;i++) { 442 subcel->subCels[i] = tempData->closest_cb2[cluster_index*4+i]; 443 444 get_frame_mb(enc->frame_to_enc, x+2*(i&1), 445 y+(i&2), mb2, 2); 446 447 subcel->eval_dist[RoQ_ID_CCC] += 448 squared_diff_macroblock(tempData->codebooks.unpacked_cb2 + subcel->subCels[i]*2*2*3, mb2, 2); 449 } 450 451 best_dist = INT_MAX; 452 for (i=0; i<4; i++) 453 if (ROQ_LAMBDA_SCALE*subcel->eval_dist[i] + enc->lambda*bitsUsed[i] < 454 best_dist) { 455 subcel->best_coding = i; 456 subcel->best_bit_use = bitsUsed[i]; 457 best_dist = ROQ_LAMBDA_SCALE*subcel->eval_dist[i] + 458 enc->lambda*bitsUsed[i]; 459 } 460} 461 462/** 463 * Get distortion for all options available to a cel 464 */ 465static void gather_data_for_cel(CelEvaluation *cel, RoqContext *enc, 466 RoqTempdata *tempData) 467{ 468 uint8_t mb8[8*8*3]; 469 int index = cel->sourceY*enc->width/64 + cel->sourceX/8; 470 int i, j, best_dist, divide_bit_use; 471 472 int bitsUsed[4] = {2, 10, 10, 0}; 473 474 if (enc->framesSinceKeyframe >= 1) { 475 cel->motion = enc->this_motion8[index]; 476 477 cel->eval_dist[RoQ_ID_FCC] = 478 eval_motion_dist(enc, cel->sourceX, cel->sourceY, 479 enc->this_motion8[index], 8); 480 } else 481 cel->eval_dist[RoQ_ID_FCC] = INT_MAX; 482 483 if (enc->framesSinceKeyframe >= 2) 484 cel->eval_dist[RoQ_ID_MOT] = block_sse(enc->frame_to_enc->data, 485 enc->current_frame->data, 486 cel->sourceX, cel->sourceY, 487 cel->sourceX, cel->sourceY, 488 enc->frame_to_enc->linesize, 489 enc->current_frame->linesize,8); 490 else 491 cel->eval_dist[RoQ_ID_MOT] = INT_MAX; 492 493 get_frame_mb(enc->frame_to_enc, cel->sourceX, cel->sourceY, mb8, 8); 494 495 cel->eval_dist[RoQ_ID_SLD] = 496 index_mb(mb8, tempData->codebooks.unpacked_cb4_enlarged, 497 tempData->codebooks.numCB4, &cel->cbEntry, 8); 498 499 gather_data_for_subcel(cel->subCels + 0, cel->sourceX+0, cel->sourceY+0, enc, tempData); 500 gather_data_for_subcel(cel->subCels + 1, cel->sourceX+4, cel->sourceY+0, enc, tempData); 501 gather_data_for_subcel(cel->subCels + 2, cel->sourceX+0, cel->sourceY+4, enc, tempData); 502 gather_data_for_subcel(cel->subCels + 3, cel->sourceX+4, cel->sourceY+4, enc, tempData); 503 504 cel->eval_dist[RoQ_ID_CCC] = 0; 505 divide_bit_use = 0; 506 for (i=0; i<4; i++) { 507 cel->eval_dist[RoQ_ID_CCC] += 508 cel->subCels[i].eval_dist[cel->subCels[i].best_coding]; 509 divide_bit_use += cel->subCels[i].best_bit_use; 510 } 511 512 best_dist = INT_MAX; 513 bitsUsed[3] = 2 + divide_bit_use; 514 515 for (i=0; i<4; i++) 516 if (ROQ_LAMBDA_SCALE*cel->eval_dist[i] + enc->lambda*bitsUsed[i] < 517 best_dist) { 518 cel->best_coding = i; 519 best_dist = ROQ_LAMBDA_SCALE*cel->eval_dist[i] + 520 enc->lambda*bitsUsed[i]; 521 } 522 523 tempData->used_option[cel->best_coding]++; 524 tempData->mainChunkSize += bitsUsed[cel->best_coding]; 525 526 if (cel->best_coding == RoQ_ID_SLD) 527 tempData->codebooks.usedCB4[cel->cbEntry]++; 528 529 if (cel->best_coding == RoQ_ID_CCC) 530 for (i=0; i<4; i++) { 531 if (cel->subCels[i].best_coding == RoQ_ID_SLD) 532 tempData->codebooks.usedCB4[cel->subCels[i].cbEntry]++; 533 else if (cel->subCels[i].best_coding == RoQ_ID_CCC) 534 for (j=0; j<4; j++) 535 tempData->codebooks.usedCB2[cel->subCels[i].subCels[j]]++; 536 } 537} 538 539static void remap_codebooks(RoqContext *enc, RoqTempdata *tempData) 540{ 541 int i, j, idx=0; 542 543 /* Make remaps for the final codebook usage */ 544 for (i=0; i<(enc->quake3_compat ? MAX_CBS_4x4-1 : MAX_CBS_4x4); i++) { 545 if (tempData->codebooks.usedCB4[i]) { 546 tempData->i2f4[i] = idx; 547 tempData->f2i4[idx] = i; 548 for (j=0; j<4; j++) 549 tempData->codebooks.usedCB2[enc->cb4x4[i].idx[j]]++; 550 idx++; 551 } 552 } 553 554 tempData->numCB4 = idx; 555 556 idx = 0; 557 for (i=0; i<MAX_CBS_2x2; i++) { 558 if (tempData->codebooks.usedCB2[i]) { 559 tempData->i2f2[i] = idx; 560 tempData->f2i2[idx] = i; 561 idx++; 562 } 563 } 564 tempData->numCB2 = idx; 565 566} 567 568/** 569 * Write codebook chunk 570 */ 571static void write_codebooks(RoqContext *enc, RoqTempdata *tempData) 572{ 573 int i, j; 574 uint8_t **outp= &enc->out_buf; 575 576 if (tempData->numCB2) { 577 bytestream_put_le16(outp, RoQ_QUAD_CODEBOOK); 578 bytestream_put_le32(outp, tempData->numCB2*6 + tempData->numCB4*4); 579 bytestream_put_byte(outp, tempData->numCB4); 580 bytestream_put_byte(outp, tempData->numCB2); 581 582 for (i=0; i<tempData->numCB2; i++) { 583 bytestream_put_buffer(outp, enc->cb2x2[tempData->f2i2[i]].y, 4); 584 bytestream_put_byte(outp, enc->cb2x2[tempData->f2i2[i]].u); 585 bytestream_put_byte(outp, enc->cb2x2[tempData->f2i2[i]].v); 586 } 587 588 for (i=0; i<tempData->numCB4; i++) 589 for (j=0; j<4; j++) 590 bytestream_put_byte(outp, tempData->i2f2[enc->cb4x4[tempData->f2i4[i]].idx[j]]); 591 592 } 593} 594 595static inline uint8_t motion_arg(motion_vect mot) 596{ 597 uint8_t ax = 8 - ((uint8_t) mot.d[0]); 598 uint8_t ay = 8 - ((uint8_t) mot.d[1]); 599 return ((ax&15)<<4) | (ay&15); 600} 601 602typedef struct 603{ 604 int typeSpool; 605 int typeSpoolLength; 606 uint8_t argumentSpool[64]; 607 uint8_t *args; 608 uint8_t **pout; 609} CodingSpool; 610 611/* NOTE: Typecodes must be spooled AFTER arguments!! */ 612static void write_typecode(CodingSpool *s, uint8_t type) 613{ 614 s->typeSpool |= (type & 3) << (14 - s->typeSpoolLength); 615 s->typeSpoolLength += 2; 616 if (s->typeSpoolLength == 16) { 617 bytestream_put_le16(s->pout, s->typeSpool); 618 bytestream_put_buffer(s->pout, s->argumentSpool, 619 s->args - s->argumentSpool); 620 s->typeSpoolLength = 0; 621 s->typeSpool = 0; 622 s->args = s->argumentSpool; 623 } 624} 625 626static void reconstruct_and_encode_image(RoqContext *enc, RoqTempdata *tempData, int w, int h, int numBlocks) 627{ 628 int i, j, k; 629 int x, y; 630 int subX, subY; 631 int dist=0; 632 633 roq_qcell *qcell; 634 CelEvaluation *eval; 635 636 CodingSpool spool; 637 638 spool.typeSpool=0; 639 spool.typeSpoolLength=0; 640 spool.args = spool.argumentSpool; 641 spool.pout = &enc->out_buf; 642 643 if (tempData->used_option[RoQ_ID_CCC]%2) 644 tempData->mainChunkSize+=8; //FIXME 645 646 /* Write the video chunk header */ 647 bytestream_put_le16(&enc->out_buf, RoQ_QUAD_VQ); 648 bytestream_put_le32(&enc->out_buf, tempData->mainChunkSize/8); 649 bytestream_put_byte(&enc->out_buf, 0x0); 650 bytestream_put_byte(&enc->out_buf, 0x0); 651 652 for (i=0; i<numBlocks; i++) { 653 eval = tempData->cel_evals + i; 654 655 x = eval->sourceX; 656 y = eval->sourceY; 657 dist += eval->eval_dist[eval->best_coding]; 658 659 switch (eval->best_coding) { 660 case RoQ_ID_MOT: 661 write_typecode(&spool, RoQ_ID_MOT); 662 break; 663 664 case RoQ_ID_FCC: 665 bytestream_put_byte(&spool.args, motion_arg(eval->motion)); 666 667 write_typecode(&spool, RoQ_ID_FCC); 668 ff_apply_motion_8x8(enc, x, y, 669 eval->motion.d[0], eval->motion.d[1]); 670 break; 671 672 case RoQ_ID_SLD: 673 bytestream_put_byte(&spool.args, tempData->i2f4[eval->cbEntry]); 674 write_typecode(&spool, RoQ_ID_SLD); 675 676 qcell = enc->cb4x4 + eval->cbEntry; 677 ff_apply_vector_4x4(enc, x , y , enc->cb2x2 + qcell->idx[0]); 678 ff_apply_vector_4x4(enc, x+4, y , enc->cb2x2 + qcell->idx[1]); 679 ff_apply_vector_4x4(enc, x , y+4, enc->cb2x2 + qcell->idx[2]); 680 ff_apply_vector_4x4(enc, x+4, y+4, enc->cb2x2 + qcell->idx[3]); 681 break; 682 683 case RoQ_ID_CCC: 684 write_typecode(&spool, RoQ_ID_CCC); 685 686 for (j=0; j<4; j++) { 687 subX = x + 4*(j&1); 688 subY = y + 2*(j&2); 689 690 switch(eval->subCels[j].best_coding) { 691 case RoQ_ID_MOT: 692 break; 693 694 case RoQ_ID_FCC: 695 bytestream_put_byte(&spool.args, 696 motion_arg(eval->subCels[j].motion)); 697 698 ff_apply_motion_4x4(enc, subX, subY, 699 eval->subCels[j].motion.d[0], 700 eval->subCels[j].motion.d[1]); 701 break; 702 703 case RoQ_ID_SLD: 704 bytestream_put_byte(&spool.args, 705 tempData->i2f4[eval->subCels[j].cbEntry]); 706 707 qcell = enc->cb4x4 + eval->subCels[j].cbEntry; 708 709 ff_apply_vector_2x2(enc, subX , subY , 710 enc->cb2x2 + qcell->idx[0]); 711 ff_apply_vector_2x2(enc, subX+2, subY , 712 enc->cb2x2 + qcell->idx[1]); 713 ff_apply_vector_2x2(enc, subX , subY+2, 714 enc->cb2x2 + qcell->idx[2]); 715 ff_apply_vector_2x2(enc, subX+2, subY+2, 716 enc->cb2x2 + qcell->idx[3]); 717 break; 718 719 case RoQ_ID_CCC: 720 for (k=0; k<4; k++) { 721 int cb_idx = eval->subCels[j].subCels[k]; 722 bytestream_put_byte(&spool.args, 723 tempData->i2f2[cb_idx]); 724 725 ff_apply_vector_2x2(enc, subX + 2*(k&1), subY + (k&2), 726 enc->cb2x2 + cb_idx); 727 } 728 break; 729 } 730 write_typecode(&spool, eval->subCels[j].best_coding); 731 } 732 break; 733 } 734 } 735 736 /* Flush the remainder of the argument/type spool */ 737 while (spool.typeSpoolLength) 738 write_typecode(&spool, 0x0); 739 740#if 0 741 uint8_t *fdata[3] = {enc->frame_to_enc->data[0], 742 enc->frame_to_enc->data[1], 743 enc->frame_to_enc->data[2]}; 744 uint8_t *cdata[3] = {enc->current_frame->data[0], 745 enc->current_frame->data[1], 746 enc->current_frame->data[2]}; 747 av_log(enc->avctx, AV_LOG_ERROR, "Expected distortion: %i Actual: %i\n", 748 dist, 749 block_sse(fdata, cdata, 0, 0, 0, 0, 750 enc->frame_to_enc->linesize, 751 enc->current_frame->linesize, 752 enc->width)); //WARNING: Square dimensions implied... 753#endif 754} 755 756 757/** 758 * Create a single YUV cell from a 2x2 section of the image 759 */ 760static inline void frame_block_to_cell(uint8_t *block, uint8_t * const *data, 761 int top, int left, const int *stride) 762{ 763 int i, j, u=0, v=0; 764 765 for (i=0; i<2; i++) 766 for (j=0; j<2; j++) { 767 int x = (top+i)*stride[0] + left + j; 768 *block++ = data[0][x]; 769 x = (top+i)*stride[1] + left + j; 770 u += data[1][x]; 771 v += data[2][x]; 772 } 773 774 *block++ = (u+2)/4; 775 *block++ = (v+2)/4; 776} 777 778/** 779 * Create YUV clusters for the entire image 780 */ 781static void create_clusters(const AVFrame *frame, int w, int h, uint8_t *yuvClusters) 782{ 783 int i, j, k, l; 784 785 for (i=0; i<h; i+=4) 786 for (j=0; j<w; j+=4) { 787 for (k=0; k < 2; k++) 788 for (l=0; l < 2; l++) 789 frame_block_to_cell(yuvClusters + (l + 2*k)*6, frame->data, 790 i+2*k, j+2*l, frame->linesize); 791 yuvClusters += 24; 792 } 793} 794 795static void generate_codebook(RoqContext *enc, RoqTempdata *tempdata, 796 int *points, int inputCount, roq_cell *results, 797 int size, int cbsize) 798{ 799 int i, j, k; 800 int c_size = size*size/4; 801 int *buf; 802 int *codebook = av_malloc_array(6*c_size, cbsize*sizeof(int)); 803 int *closest_cb; 804 805 if (size == 4) 806 closest_cb = av_malloc_array(6*c_size, inputCount*sizeof(int)); 807 else 808 closest_cb = tempdata->closest_cb2; 809 810 avpriv_init_elbg(points, 6*c_size, inputCount, codebook, cbsize, 1, closest_cb, &enc->randctx); 811 avpriv_do_elbg(points, 6*c_size, inputCount, codebook, cbsize, 1, closest_cb, &enc->randctx); 812 813 if (size == 4) 814 av_free(closest_cb); 815 816 buf = codebook; 817 for (i=0; i<cbsize; i++) 818 for (k=0; k<c_size; k++) { 819 for(j=0; j<4; j++) 820 results->y[j] = *buf++; 821 822 results->u = (*buf++ + CHROMA_BIAS/2)/CHROMA_BIAS; 823 results->v = (*buf++ + CHROMA_BIAS/2)/CHROMA_BIAS; 824 results++; 825 } 826 827 av_free(codebook); 828} 829 830static void generate_new_codebooks(RoqContext *enc, RoqTempdata *tempData) 831{ 832 int i,j; 833 RoqCodebooks *codebooks = &tempData->codebooks; 834 int max = enc->width*enc->height/16; 835 uint8_t mb2[3*4]; 836 roq_cell *results4 = av_malloc(sizeof(roq_cell)*MAX_CBS_4x4*4); 837 uint8_t *yuvClusters=av_malloc_array(max, sizeof(int)*6*4); 838 int *points = av_malloc_array(max, 6*4*sizeof(int)); 839 int bias; 840 841 /* Subsample YUV data */ 842 create_clusters(enc->frame_to_enc, enc->width, enc->height, yuvClusters); 843 844 /* Cast to integer and apply chroma bias */ 845 for (i=0; i<max*24; i++) { 846 bias = ((i%6)<4) ? 1 : CHROMA_BIAS; 847 points[i] = bias*yuvClusters[i]; 848 } 849 850 /* Create 4x4 codebooks */ 851 generate_codebook(enc, tempData, points, max, results4, 4, (enc->quake3_compat ? MAX_CBS_4x4-1 : MAX_CBS_4x4)); 852 853 codebooks->numCB4 = (enc->quake3_compat ? MAX_CBS_4x4-1 : MAX_CBS_4x4); 854 855 tempData->closest_cb2 = av_malloc_array(max, 4*sizeof(int)); 856 857 /* Create 2x2 codebooks */ 858 generate_codebook(enc, tempData, points, max*4, enc->cb2x2, 2, MAX_CBS_2x2); 859 860 codebooks->numCB2 = MAX_CBS_2x2; 861 862 /* Unpack 2x2 codebook clusters */ 863 for (i=0; i<codebooks->numCB2; i++) 864 unpack_roq_cell(enc->cb2x2 + i, codebooks->unpacked_cb2 + i*2*2*3); 865 866 /* Index all 4x4 entries to the 2x2 entries, unpack, and enlarge */ 867 for (i=0; i<codebooks->numCB4; i++) { 868 for (j=0; j<4; j++) { 869 unpack_roq_cell(&results4[4*i + j], mb2); 870 index_mb(mb2, codebooks->unpacked_cb2, codebooks->numCB2, 871 &enc->cb4x4[i].idx[j], 2); 872 } 873 unpack_roq_qcell(codebooks->unpacked_cb2, enc->cb4x4 + i, 874 codebooks->unpacked_cb4 + i*4*4*3); 875 enlarge_roq_mb4(codebooks->unpacked_cb4 + i*4*4*3, 876 codebooks->unpacked_cb4_enlarged + i*8*8*3); 877 } 878 879 av_free(yuvClusters); 880 av_free(points); 881 av_free(results4); 882} 883 884static int roq_encode_video(RoqContext *enc) 885{ 886 RoqTempdata *tempData = enc->tmpData; 887 int i; 888 889 memset(tempData, 0, sizeof(*tempData)); 890 891 create_cel_evals(enc, tempData); 892 893 generate_new_codebooks(enc, tempData); 894 895 if (enc->framesSinceKeyframe >= 1) { 896 motion_search(enc, 8); 897 motion_search(enc, 4); 898 } 899 900 retry_encode: 901 for (i=0; i<enc->width*enc->height/64; i++) 902 gather_data_for_cel(tempData->cel_evals + i, enc, tempData); 903 904 /* Quake 3 can't handle chunks bigger than 65535 bytes */ 905 if (tempData->mainChunkSize/8 > 65535 && enc->quake3_compat) { 906 if (enc->lambda > 100000) { 907 av_log(enc->avctx, AV_LOG_ERROR, "Cannot encode video in Quake compatible form\n"); 908 return AVERROR(EINVAL); 909 } 910 av_log(enc->avctx, AV_LOG_ERROR, 911 "Warning, generated a frame too big for Quake (%d > 65535), " 912 "now switching to a bigger qscale value.\n", 913 tempData->mainChunkSize/8); 914 enc->lambda *= 1.5; 915 tempData->mainChunkSize = 0; 916 memset(tempData->used_option, 0, sizeof(tempData->used_option)); 917 memset(tempData->codebooks.usedCB4, 0, 918 sizeof(tempData->codebooks.usedCB4)); 919 memset(tempData->codebooks.usedCB2, 0, 920 sizeof(tempData->codebooks.usedCB2)); 921 922 goto retry_encode; 923 } 924 925 remap_codebooks(enc, tempData); 926 927 write_codebooks(enc, tempData); 928 929 reconstruct_and_encode_image(enc, tempData, enc->width, enc->height, 930 enc->width*enc->height/64); 931 932 enc->avctx->coded_frame = enc->current_frame; 933 934 /* Rotate frame history */ 935 FFSWAP(AVFrame *, enc->current_frame, enc->last_frame); 936 FFSWAP(motion_vect *, enc->last_motion4, enc->this_motion4); 937 FFSWAP(motion_vect *, enc->last_motion8, enc->this_motion8); 938 939 av_free(tempData->cel_evals); 940 av_free(tempData->closest_cb2); 941 942 enc->framesSinceKeyframe++; 943 944 return 0; 945} 946 947static av_cold int roq_encode_end(AVCodecContext *avctx) 948{ 949 RoqContext *enc = avctx->priv_data; 950 951 av_frame_free(&enc->current_frame); 952 av_frame_free(&enc->last_frame); 953 954 av_free(enc->tmpData); 955 av_free(enc->this_motion4); 956 av_free(enc->last_motion4); 957 av_free(enc->this_motion8); 958 av_free(enc->last_motion8); 959 960 return 0; 961} 962 963static av_cold int roq_encode_init(AVCodecContext *avctx) 964{ 965 RoqContext *enc = avctx->priv_data; 966 967 av_lfg_init(&enc->randctx, 1); 968 969 enc->framesSinceKeyframe = 0; 970 if ((avctx->width & 0xf) || (avctx->height & 0xf)) { 971 av_log(avctx, AV_LOG_ERROR, "Dimensions must be divisible by 16\n"); 972 return AVERROR(EINVAL); 973 } 974 975 if (avctx->width > 65535 || avctx->height > 65535) { 976 av_log(avctx, AV_LOG_ERROR, "Dimensions are max %d\n", enc->quake3_compat ? 32768 : 65535); 977 return AVERROR(EINVAL); 978 } 979 980 if (((avctx->width)&(avctx->width-1))||((avctx->height)&(avctx->height-1))) 981 av_log(avctx, AV_LOG_ERROR, "Warning: dimensions not power of two, this is not supported by quake\n"); 982 983 enc->width = avctx->width; 984 enc->height = avctx->height; 985 986 enc->framesSinceKeyframe = 0; 987 enc->first_frame = 1; 988 989 enc->last_frame = av_frame_alloc(); 990 enc->current_frame = av_frame_alloc(); 991 if (!enc->last_frame || !enc->current_frame) { 992 roq_encode_end(avctx); 993 return AVERROR(ENOMEM); 994 } 995 996 enc->tmpData = av_malloc(sizeof(RoqTempdata)); 997 998 enc->this_motion4 = 999 av_mallocz_array((enc->width*enc->height/16), sizeof(motion_vect)); 1000 1001 enc->last_motion4 = 1002 av_malloc_array ((enc->width*enc->height/16), sizeof(motion_vect)); 1003 1004 enc->this_motion8 = 1005 av_mallocz_array((enc->width*enc->height/64), sizeof(motion_vect)); 1006 1007 enc->last_motion8 = 1008 av_malloc_array ((enc->width*enc->height/64), sizeof(motion_vect)); 1009 1010 return 0; 1011} 1012 1013static void roq_write_video_info_chunk(RoqContext *enc) 1014{ 1015 /* ROQ info chunk */ 1016 bytestream_put_le16(&enc->out_buf, RoQ_INFO); 1017 1018 /* Size: 8 bytes */ 1019 bytestream_put_le32(&enc->out_buf, 8); 1020 1021 /* Unused argument */ 1022 bytestream_put_byte(&enc->out_buf, 0x00); 1023 bytestream_put_byte(&enc->out_buf, 0x00); 1024 1025 /* Width */ 1026 bytestream_put_le16(&enc->out_buf, enc->width); 1027 1028 /* Height */ 1029 bytestream_put_le16(&enc->out_buf, enc->height); 1030 1031 /* Unused in Quake 3, mimics the output of the real encoder */ 1032 bytestream_put_byte(&enc->out_buf, 0x08); 1033 bytestream_put_byte(&enc->out_buf, 0x00); 1034 bytestream_put_byte(&enc->out_buf, 0x04); 1035 bytestream_put_byte(&enc->out_buf, 0x00); 1036} 1037 1038static int roq_encode_frame(AVCodecContext *avctx, AVPacket *pkt, 1039 const AVFrame *frame, int *got_packet) 1040{ 1041 RoqContext *enc = avctx->priv_data; 1042 int size, ret; 1043 1044 enc->avctx = avctx; 1045 1046 enc->frame_to_enc = frame; 1047 1048 if (frame->quality) 1049 enc->lambda = frame->quality - 1; 1050 else 1051 enc->lambda = 2*ROQ_LAMBDA_SCALE; 1052 1053 /* 138 bits max per 8x8 block + 1054 * 256 codebooks*(6 bytes 2x2 + 4 bytes 4x4) + 8 bytes frame header */ 1055 size = ((enc->width * enc->height / 64) * 138 + 7) / 8 + 256 * (6 + 4) + 8; 1056 if ((ret = ff_alloc_packet2(avctx, pkt, size)) < 0) 1057 return ret; 1058 enc->out_buf = pkt->data; 1059 1060 /* Check for I frame */ 1061 if (enc->framesSinceKeyframe == avctx->gop_size) 1062 enc->framesSinceKeyframe = 0; 1063 1064 if (enc->first_frame) { 1065 /* Alloc memory for the reconstruction data (we must know the stride 1066 for that) */ 1067 if ((ret = ff_get_buffer(avctx, enc->current_frame, 0)) < 0 || 1068 (ret = ff_get_buffer(avctx, enc->last_frame, 0)) < 0) 1069 return ret; 1070 1071 /* Before the first video frame, write a "video info" chunk */ 1072 roq_write_video_info_chunk(enc); 1073 1074 enc->first_frame = 0; 1075 } 1076 1077 /* Encode the actual frame */ 1078 if ((ret = roq_encode_video(enc)) < 0) 1079 return ret; 1080 1081 pkt->size = enc->out_buf - pkt->data; 1082 if (enc->framesSinceKeyframe == 1) 1083 pkt->flags |= AV_PKT_FLAG_KEY; 1084 *got_packet = 1; 1085 1086 return 0; 1087} 1088 1089#define OFFSET(x) offsetof(RoqContext, x) 1090#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM 1091static const AVOption options[] = { 1092 { "quake3_compat", "Whether to respect known limitations in Quake 3 decoder", OFFSET(quake3_compat), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, VE }, 1093 { NULL }, 1094}; 1095 1096static const AVClass roq_class = { 1097 .class_name = "RoQ", 1098 .item_name = av_default_item_name, 1099 .option = options, 1100 .version = LIBAVUTIL_VERSION_INT, 1101}; 1102 1103AVCodec ff_roq_encoder = { 1104 .name = "roqvideo", 1105 .long_name = NULL_IF_CONFIG_SMALL("id RoQ video"), 1106 .type = AVMEDIA_TYPE_VIDEO, 1107 .id = AV_CODEC_ID_ROQ, 1108 .priv_data_size = sizeof(RoqContext), 1109 .init = roq_encode_init, 1110 .encode2 = roq_encode_frame, 1111 .close = roq_encode_end, 1112 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUVJ444P, 1113 AV_PIX_FMT_NONE }, 1114 .priv_class = &roq_class, 1115}; 1116