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/lfg.h" 61#include "libavutil/opt.h" 62#include "roqvideo.h" 63#include "bytestream.h" 64#include "codec_internal.h" 65#include "elbg.h" 66#include "encode.h" 67#include "internal.h" 68#include "mathops.h" 69 70#define CHROMA_BIAS 1 71 72/** 73 * Maximum number of generated 4x4 codebooks. Can't be 256 to workaround a 74 * Quake 3 bug. 75 */ 76#define MAX_CBS_4x4 256 77 78#define MAX_CBS_2x2 256 ///< Maximum number of 2x2 codebooks. 79 80/* The cast is useful when multiplying it by INT_MAX */ 81#define ROQ_LAMBDA_SCALE ((uint64_t) FF_LAMBDA_SCALE) 82 83typedef struct RoqCodebooks { 84 int numCB4; 85 int numCB2; 86 int usedCB2[MAX_CBS_2x2]; 87 int usedCB4[MAX_CBS_4x4]; 88 uint8_t unpacked_cb2[MAX_CBS_2x2*2*2*3]; 89 uint8_t unpacked_cb4[MAX_CBS_4x4*4*4*3]; 90 uint8_t unpacked_cb4_enlarged[MAX_CBS_4x4*8*8*3]; 91} RoqCodebooks; 92 93/** 94 * Temporary vars 95 */ 96typedef struct RoqTempData 97{ 98 int f2i4[MAX_CBS_4x4]; 99 int i2f4[MAX_CBS_4x4]; 100 int f2i2[MAX_CBS_2x2]; 101 int i2f2[MAX_CBS_2x2]; 102 103 int mainChunkSize; 104 105 int numCB4; 106 int numCB2; 107 108 RoqCodebooks codebooks; 109 110 int used_option[4]; 111} RoqTempData; 112 113typedef struct SubcelEvaluation { 114 int eval_dist[4]; 115 int best_bit_use; 116 int best_coding; 117 118 int subCels[4]; 119 motion_vect motion; 120 int cbEntry; 121} SubcelEvaluation; 122 123typedef struct CelEvaluation { 124 int eval_dist[4]; 125 int best_coding; 126 127 SubcelEvaluation subCels[4]; 128 129 motion_vect motion; 130 int cbEntry; 131 132 int sourceX, sourceY; 133} CelEvaluation; 134 135typedef struct RoqEncContext { 136 RoqContext common; 137 struct ELBGContext *elbg; 138 AVLFG randctx; 139 uint64_t lambda; 140 141 motion_vect *this_motion4; 142 motion_vect *last_motion4; 143 144 motion_vect *this_motion8; 145 motion_vect *last_motion8; 146 147 unsigned int framesSinceKeyframe; 148 149 const AVFrame *frame_to_enc; 150 uint8_t *out_buf; 151 RoqTempData tmp_data; 152 roq_cell results4[4 * MAX_CBS_4x4]; 153 int tmp_codebook_buf[FFMAX(24 * MAX_CBS_4x4, 6 * MAX_CBS_2x2)]; 154 155 CelEvaluation *cel_evals; 156 int *closest_cb; 157 int *points; // Allocated together with closest_cb 158 159 int first_frame; 160 int quake3_compat; // Quake 3 compatibility option 161} RoqEncContext; 162 163/* Macroblock support functions */ 164static void unpack_roq_cell(roq_cell *cell, uint8_t u[4*3]) 165{ 166 memcpy(u , cell->y, 4); 167 memset(u+4, cell->u, 4); 168 memset(u+8, cell->v, 4); 169} 170 171static void unpack_roq_qcell(uint8_t cb2[], roq_qcell *qcell, uint8_t u[4*4*3]) 172{ 173 int i,cp; 174 static const int offsets[4] = {0, 2, 8, 10}; 175 176 for (cp=0; cp<3; cp++) 177 for (i=0; i<4; i++) { 178 u[4*4*cp + offsets[i] ] = cb2[qcell->idx[i]*2*2*3 + 4*cp ]; 179 u[4*4*cp + offsets[i]+1] = cb2[qcell->idx[i]*2*2*3 + 4*cp+1]; 180 u[4*4*cp + offsets[i]+4] = cb2[qcell->idx[i]*2*2*3 + 4*cp+2]; 181 u[4*4*cp + offsets[i]+5] = cb2[qcell->idx[i]*2*2*3 + 4*cp+3]; 182 } 183} 184 185 186static void enlarge_roq_mb4(uint8_t base[3*16], uint8_t u[3*64]) 187{ 188 int x,y,cp; 189 190 for(cp=0; cp<3; cp++) 191 for(y=0; y<8; y++) 192 for(x=0; x<8; x++) 193 *u++ = base[(y/2)*4 + (x/2) + 16*cp]; 194} 195 196static inline int square(int x) 197{ 198 return x*x; 199} 200 201static inline int eval_sse(const uint8_t *a, const uint8_t *b, int count) 202{ 203 int diff=0; 204 205 while(count--) 206 diff += square(*b++ - *a++); 207 208 return diff; 209} 210 211// FIXME Could use DSPContext.sse, but it is not so speed critical (used 212// just for motion estimation). 213static int block_sse(uint8_t * const *buf1, uint8_t * const *buf2, int x1, int y1, 214 int x2, int y2, const int *stride1, const int *stride2, int size) 215{ 216 int i, k; 217 int sse=0; 218 219 for (k=0; k<3; k++) { 220 int bias = (k ? CHROMA_BIAS : 4); 221 for (i=0; i<size; i++) 222 sse += bias*eval_sse(buf1[k] + (y1+i)*stride1[k] + x1, 223 buf2[k] + (y2+i)*stride2[k] + x2, size); 224 } 225 226 return sse; 227} 228 229static int eval_motion_dist(RoqEncContext *enc, int x, int y, motion_vect vect, 230 int size) 231{ 232 RoqContext *const roq = &enc->common; 233 int mx=vect.d[0]; 234 int my=vect.d[1]; 235 236 if (mx < -7 || mx > 7) 237 return INT_MAX; 238 239 if (my < -7 || my > 7) 240 return INT_MAX; 241 242 mx += x; 243 my += y; 244 245 if ((unsigned) mx > roq->width-size || (unsigned) my > roq->height-size) 246 return INT_MAX; 247 248 return block_sse(enc->frame_to_enc->data, roq->last_frame->data, x, y, 249 mx, my, 250 enc->frame_to_enc->linesize, roq->last_frame->linesize, 251 size); 252} 253 254/** 255 * @return distortion between two macroblocks 256 */ 257static inline int squared_diff_macroblock(uint8_t a[], uint8_t b[], int size) 258{ 259 int cp, sdiff=0; 260 261 for(cp=0;cp<3;cp++) { 262 int bias = (cp ? CHROMA_BIAS : 4); 263 sdiff += bias*eval_sse(a, b, size*size); 264 a += size*size; 265 b += size*size; 266 } 267 268 return sdiff; 269} 270 271/** 272 * Initialize cel evaluators and set their source coordinates 273 */ 274static int create_cel_evals(RoqEncContext *enc) 275{ 276 RoqContext *const roq = &enc->common; 277 278 enc->cel_evals = av_malloc_array(roq->width * roq->height / 64, sizeof(CelEvaluation)); 279 if (!enc->cel_evals) 280 return AVERROR(ENOMEM); 281 282 /* Map to the ROQ quadtree order */ 283 for (int y = 0, n = 0; y < roq->height; y += 16) 284 for (int x = 0; x < roq->width; x += 16) 285 for(int i = 0; i < 4; i++) { 286 enc->cel_evals[n ].sourceX = x + (i&1)*8; 287 enc->cel_evals[n++].sourceY = y + (i&2)*4; 288 } 289 290 return 0; 291} 292 293/** 294 * Get macroblocks from parts of the image 295 */ 296static void get_frame_mb(const AVFrame *frame, int x, int y, uint8_t mb[], int dim) 297{ 298 int i, j, cp; 299 300 for (cp=0; cp<3; cp++) { 301 int stride = frame->linesize[cp]; 302 for (i=0; i<dim; i++) 303 for (j=0; j<dim; j++) 304 *mb++ = frame->data[cp][(y+i)*stride + x + j]; 305 } 306} 307 308/** 309 * Find the codebook with the lowest distortion from an image 310 */ 311static int index_mb(uint8_t cluster[], uint8_t cb[], int numCB, 312 int *outIndex, int dim) 313{ 314 int i, lDiff = INT_MAX, pick=0; 315 316 /* Diff against the others */ 317 for (i=0; i<numCB; i++) { 318 int diff = squared_diff_macroblock(cluster, cb + i*dim*dim*3, dim); 319 if (diff < lDiff) { 320 lDiff = diff; 321 pick = i; 322 } 323 } 324 325 *outIndex = pick; 326 return lDiff; 327} 328 329#define EVAL_MOTION(MOTION) \ 330 do { \ 331 diff = eval_motion_dist(enc, j, i, MOTION, blocksize); \ 332 \ 333 if (diff < lowestdiff) { \ 334 lowestdiff = diff; \ 335 bestpick = MOTION; \ 336 } \ 337 } while(0) 338 339static void motion_search(RoqEncContext *enc, int blocksize) 340{ 341 static const motion_vect offsets[8] = { 342 {{ 0,-1}}, 343 {{ 0, 1}}, 344 {{-1, 0}}, 345 {{ 1, 0}}, 346 {{-1, 1}}, 347 {{ 1,-1}}, 348 {{-1,-1}}, 349 {{ 1, 1}}, 350 }; 351 352 RoqContext *const roq = &enc->common; 353 int diff, lowestdiff, oldbest; 354 int off[3]; 355 motion_vect bestpick = {{0,0}}; 356 int i, j, k, offset; 357 358 motion_vect *last_motion; 359 motion_vect *this_motion; 360 motion_vect vect, vect2; 361 const int max = (roq->width / blocksize) * roq->height / blocksize; 362 363 if (blocksize == 4) { 364 last_motion = enc->last_motion4; 365 this_motion = enc->this_motion4; 366 } else { 367 last_motion = enc->last_motion8; 368 this_motion = enc->this_motion8; 369 } 370 371 for (i = 0; i< roq->height; i += blocksize) 372 for (j = 0; j < roq->width; j += blocksize) { 373 lowestdiff = eval_motion_dist(enc, j, i, (motion_vect) {{0,0}}, 374 blocksize); 375 bestpick.d[0] = 0; 376 bestpick.d[1] = 0; 377 378 if (blocksize == 4) 379 EVAL_MOTION(enc->this_motion8[(i/8) * (roq->width/8) + j/8]); 380 381 offset = (i/blocksize) * roq->width / blocksize + j / blocksize; 382 if (offset < max && offset >= 0) 383 EVAL_MOTION(last_motion[offset]); 384 385 offset++; 386 if (offset < max && offset >= 0) 387 EVAL_MOTION(last_motion[offset]); 388 389 offset = (i/blocksize + 1) * roq->width / blocksize + j / blocksize; 390 if (offset < max && offset >= 0) 391 EVAL_MOTION(last_motion[offset]); 392 393 off[0]= (i/blocksize) * roq->width / blocksize + j/blocksize - 1; 394 off[1]= off[0] - roq->width / blocksize + 1; 395 off[2]= off[1] + 1; 396 397 if (i) { 398 399 for(k=0; k<2; k++) 400 vect.d[k]= mid_pred(this_motion[off[0]].d[k], 401 this_motion[off[1]].d[k], 402 this_motion[off[2]].d[k]); 403 404 EVAL_MOTION(vect); 405 for(k=0; k<3; k++) 406 EVAL_MOTION(this_motion[off[k]]); 407 } else if(j) 408 EVAL_MOTION(this_motion[off[0]]); 409 410 vect = bestpick; 411 412 oldbest = -1; 413 while (oldbest != lowestdiff) { 414 oldbest = lowestdiff; 415 for (k=0; k<8; k++) { 416 vect2 = vect; 417 vect2.d[0] += offsets[k].d[0]; 418 vect2.d[1] += offsets[k].d[1]; 419 EVAL_MOTION(vect2); 420 } 421 vect = bestpick; 422 } 423 offset = (i/blocksize) * roq->width / blocksize + j/blocksize; 424 this_motion[offset] = bestpick; 425 } 426} 427 428/** 429 * Get distortion for all options available to a subcel 430 */ 431static void gather_data_for_subcel(SubcelEvaluation *subcel, int x, 432 int y, RoqEncContext *enc) 433{ 434 RoqContext *const roq = &enc->common; 435 RoqTempData *const tempData = &enc->tmp_data; 436 uint8_t mb4[4*4*3]; 437 uint8_t mb2[2*2*3]; 438 int cluster_index; 439 int i, best_dist; 440 441 static const int bitsUsed[4] = {2, 10, 10, 34}; 442 443 if (enc->framesSinceKeyframe >= 1) { 444 subcel->motion = enc->this_motion4[y * roq->width / 16 + x / 4]; 445 446 subcel->eval_dist[RoQ_ID_FCC] = 447 eval_motion_dist(enc, x, y, 448 enc->this_motion4[y * roq->width / 16 + x / 4], 4); 449 } else 450 subcel->eval_dist[RoQ_ID_FCC] = INT_MAX; 451 452 if (enc->framesSinceKeyframe >= 2) 453 subcel->eval_dist[RoQ_ID_MOT] = block_sse(enc->frame_to_enc->data, 454 roq->current_frame->data, x, 455 y, x, y, 456 enc->frame_to_enc->linesize, 457 roq->current_frame->linesize, 458 4); 459 else 460 subcel->eval_dist[RoQ_ID_MOT] = INT_MAX; 461 462 cluster_index = y * roq->width / 16 + x / 4; 463 464 get_frame_mb(enc->frame_to_enc, x, y, mb4, 4); 465 466 subcel->eval_dist[RoQ_ID_SLD] = index_mb(mb4, 467 tempData->codebooks.unpacked_cb4, 468 tempData->codebooks.numCB4, 469 &subcel->cbEntry, 4); 470 471 subcel->eval_dist[RoQ_ID_CCC] = 0; 472 473 for(i=0;i<4;i++) { 474 subcel->subCels[i] = enc->closest_cb[cluster_index*4+i]; 475 476 get_frame_mb(enc->frame_to_enc, x+2*(i&1), 477 y+(i&2), mb2, 2); 478 479 subcel->eval_dist[RoQ_ID_CCC] += 480 squared_diff_macroblock(tempData->codebooks.unpacked_cb2 + subcel->subCels[i]*2*2*3, mb2, 2); 481 } 482 483 best_dist = INT_MAX; 484 for (i=0; i<4; i++) 485 if (ROQ_LAMBDA_SCALE*subcel->eval_dist[i] + enc->lambda*bitsUsed[i] < 486 best_dist) { 487 subcel->best_coding = i; 488 subcel->best_bit_use = bitsUsed[i]; 489 best_dist = ROQ_LAMBDA_SCALE*subcel->eval_dist[i] + 490 enc->lambda*bitsUsed[i]; 491 } 492} 493 494/** 495 * Get distortion for all options available to a cel 496 */ 497static void gather_data_for_cel(CelEvaluation *cel, RoqEncContext *enc) 498{ 499 RoqContext *const roq = &enc->common; 500 RoqTempData *const tempData = &enc->tmp_data; 501 uint8_t mb8[8*8*3]; 502 int index = cel->sourceY * roq->width / 64 + cel->sourceX/8; 503 int i, j, best_dist, divide_bit_use; 504 505 int bitsUsed[4] = {2, 10, 10, 0}; 506 507 if (enc->framesSinceKeyframe >= 1) { 508 cel->motion = enc->this_motion8[index]; 509 510 cel->eval_dist[RoQ_ID_FCC] = 511 eval_motion_dist(enc, cel->sourceX, cel->sourceY, 512 enc->this_motion8[index], 8); 513 } else 514 cel->eval_dist[RoQ_ID_FCC] = INT_MAX; 515 516 if (enc->framesSinceKeyframe >= 2) 517 cel->eval_dist[RoQ_ID_MOT] = block_sse(enc->frame_to_enc->data, 518 roq->current_frame->data, 519 cel->sourceX, cel->sourceY, 520 cel->sourceX, cel->sourceY, 521 enc->frame_to_enc->linesize, 522 roq->current_frame->linesize,8); 523 else 524 cel->eval_dist[RoQ_ID_MOT] = INT_MAX; 525 526 get_frame_mb(enc->frame_to_enc, cel->sourceX, cel->sourceY, mb8, 8); 527 528 cel->eval_dist[RoQ_ID_SLD] = 529 index_mb(mb8, tempData->codebooks.unpacked_cb4_enlarged, 530 tempData->codebooks.numCB4, &cel->cbEntry, 8); 531 532 gather_data_for_subcel(cel->subCels + 0, cel->sourceX+0, cel->sourceY+0, enc); 533 gather_data_for_subcel(cel->subCels + 1, cel->sourceX+4, cel->sourceY+0, enc); 534 gather_data_for_subcel(cel->subCels + 2, cel->sourceX+0, cel->sourceY+4, enc); 535 gather_data_for_subcel(cel->subCels + 3, cel->sourceX+4, cel->sourceY+4, enc); 536 537 cel->eval_dist[RoQ_ID_CCC] = 0; 538 divide_bit_use = 0; 539 for (i=0; i<4; i++) { 540 cel->eval_dist[RoQ_ID_CCC] += 541 cel->subCels[i].eval_dist[cel->subCels[i].best_coding]; 542 divide_bit_use += cel->subCels[i].best_bit_use; 543 } 544 545 best_dist = INT_MAX; 546 bitsUsed[3] = 2 + divide_bit_use; 547 548 for (i=0; i<4; i++) 549 if (ROQ_LAMBDA_SCALE*cel->eval_dist[i] + enc->lambda*bitsUsed[i] < 550 best_dist) { 551 cel->best_coding = i; 552 best_dist = ROQ_LAMBDA_SCALE*cel->eval_dist[i] + 553 enc->lambda*bitsUsed[i]; 554 } 555 556 tempData->used_option[cel->best_coding]++; 557 tempData->mainChunkSize += bitsUsed[cel->best_coding]; 558 559 if (cel->best_coding == RoQ_ID_SLD) 560 tempData->codebooks.usedCB4[cel->cbEntry]++; 561 562 if (cel->best_coding == RoQ_ID_CCC) 563 for (i=0; i<4; i++) { 564 if (cel->subCels[i].best_coding == RoQ_ID_SLD) 565 tempData->codebooks.usedCB4[cel->subCels[i].cbEntry]++; 566 else if (cel->subCels[i].best_coding == RoQ_ID_CCC) 567 for (j=0; j<4; j++) 568 tempData->codebooks.usedCB2[cel->subCels[i].subCels[j]]++; 569 } 570} 571 572static void remap_codebooks(RoqEncContext *enc) 573{ 574 RoqContext *const roq = &enc->common; 575 RoqTempData *const tempData = &enc->tmp_data; 576 int i, j, idx=0; 577 578 /* Make remaps for the final codebook usage */ 579 for (i=0; i<(enc->quake3_compat ? MAX_CBS_4x4-1 : MAX_CBS_4x4); i++) { 580 if (tempData->codebooks.usedCB4[i]) { 581 tempData->i2f4[i] = idx; 582 tempData->f2i4[idx] = i; 583 for (j=0; j<4; j++) 584 tempData->codebooks.usedCB2[roq->cb4x4[i].idx[j]]++; 585 idx++; 586 } 587 } 588 589 tempData->numCB4 = idx; 590 591 idx = 0; 592 for (i=0; i<MAX_CBS_2x2; i++) { 593 if (tempData->codebooks.usedCB2[i]) { 594 tempData->i2f2[i] = idx; 595 tempData->f2i2[idx] = i; 596 idx++; 597 } 598 } 599 tempData->numCB2 = idx; 600 601} 602 603/** 604 * Write codebook chunk 605 */ 606static void write_codebooks(RoqEncContext *enc) 607{ 608 RoqContext *const roq = &enc->common; 609 RoqTempData *const tempData = &enc->tmp_data; 610 int i, j; 611 uint8_t **outp= &enc->out_buf; 612 613 if (tempData->numCB2) { 614 bytestream_put_le16(outp, RoQ_QUAD_CODEBOOK); 615 bytestream_put_le32(outp, tempData->numCB2*6 + tempData->numCB4*4); 616 bytestream_put_byte(outp, tempData->numCB4); 617 bytestream_put_byte(outp, tempData->numCB2); 618 619 for (i=0; i<tempData->numCB2; i++) { 620 bytestream_put_buffer(outp, roq->cb2x2[tempData->f2i2[i]].y, 4); 621 bytestream_put_byte(outp, roq->cb2x2[tempData->f2i2[i]].u); 622 bytestream_put_byte(outp, roq->cb2x2[tempData->f2i2[i]].v); 623 } 624 625 for (i=0; i<tempData->numCB4; i++) 626 for (j=0; j<4; j++) 627 bytestream_put_byte(outp, tempData->i2f2[roq->cb4x4[tempData->f2i4[i]].idx[j]]); 628 629 } 630} 631 632static inline uint8_t motion_arg(motion_vect mot) 633{ 634 uint8_t ax = 8 - ((uint8_t) mot.d[0]); 635 uint8_t ay = 8 - ((uint8_t) mot.d[1]); 636 return ((ax&15)<<4) | (ay&15); 637} 638 639typedef struct CodingSpool { 640 int typeSpool; 641 int typeSpoolLength; 642 uint8_t argumentSpool[64]; 643 uint8_t *args; 644 uint8_t **pout; 645} CodingSpool; 646 647/* NOTE: Typecodes must be spooled AFTER arguments!! */ 648static void write_typecode(CodingSpool *s, uint8_t type) 649{ 650 s->typeSpool |= (type & 3) << (14 - s->typeSpoolLength); 651 s->typeSpoolLength += 2; 652 if (s->typeSpoolLength == 16) { 653 bytestream_put_le16(s->pout, s->typeSpool); 654 bytestream_put_buffer(s->pout, s->argumentSpool, 655 s->args - s->argumentSpool); 656 s->typeSpoolLength = 0; 657 s->typeSpool = 0; 658 s->args = s->argumentSpool; 659 } 660} 661 662static void reconstruct_and_encode_image(RoqEncContext *enc, 663 int w, int h, int numBlocks) 664{ 665 RoqContext *const roq = &enc->common; 666 RoqTempData *const tempData = &enc->tmp_data; 667 int i, j, k; 668 int x, y; 669 int subX, subY; 670 671 roq_qcell *qcell; 672 CelEvaluation *eval; 673 674 CodingSpool spool; 675 676 spool.typeSpool=0; 677 spool.typeSpoolLength=0; 678 spool.args = spool.argumentSpool; 679 spool.pout = &enc->out_buf; 680 681 if (tempData->used_option[RoQ_ID_CCC]%2) 682 tempData->mainChunkSize+=8; //FIXME 683 684 /* Write the video chunk header */ 685 bytestream_put_le16(&enc->out_buf, RoQ_QUAD_VQ); 686 bytestream_put_le32(&enc->out_buf, tempData->mainChunkSize/8); 687 bytestream_put_byte(&enc->out_buf, 0x0); 688 bytestream_put_byte(&enc->out_buf, 0x0); 689 690 for (i=0; i<numBlocks; i++) { 691 eval = enc->cel_evals + i; 692 693 x = eval->sourceX; 694 y = eval->sourceY; 695 696 switch (eval->best_coding) { 697 case RoQ_ID_MOT: 698 write_typecode(&spool, RoQ_ID_MOT); 699 break; 700 701 case RoQ_ID_FCC: 702 bytestream_put_byte(&spool.args, motion_arg(eval->motion)); 703 704 write_typecode(&spool, RoQ_ID_FCC); 705 ff_apply_motion_8x8(roq, x, y, 706 eval->motion.d[0], eval->motion.d[1]); 707 break; 708 709 case RoQ_ID_SLD: 710 bytestream_put_byte(&spool.args, tempData->i2f4[eval->cbEntry]); 711 write_typecode(&spool, RoQ_ID_SLD); 712 713 qcell = roq->cb4x4 + eval->cbEntry; 714 ff_apply_vector_4x4(roq, x , y , roq->cb2x2 + qcell->idx[0]); 715 ff_apply_vector_4x4(roq, x+4, y , roq->cb2x2 + qcell->idx[1]); 716 ff_apply_vector_4x4(roq, x , y+4, roq->cb2x2 + qcell->idx[2]); 717 ff_apply_vector_4x4(roq, x+4, y+4, roq->cb2x2 + qcell->idx[3]); 718 break; 719 720 case RoQ_ID_CCC: 721 write_typecode(&spool, RoQ_ID_CCC); 722 723 for (j=0; j<4; j++) { 724 subX = x + 4*(j&1); 725 subY = y + 2*(j&2); 726 727 switch(eval->subCels[j].best_coding) { 728 case RoQ_ID_MOT: 729 break; 730 731 case RoQ_ID_FCC: 732 bytestream_put_byte(&spool.args, 733 motion_arg(eval->subCels[j].motion)); 734 735 ff_apply_motion_4x4(roq, subX, subY, 736 eval->subCels[j].motion.d[0], 737 eval->subCels[j].motion.d[1]); 738 break; 739 740 case RoQ_ID_SLD: 741 bytestream_put_byte(&spool.args, 742 tempData->i2f4[eval->subCels[j].cbEntry]); 743 744 qcell = roq->cb4x4 + eval->subCels[j].cbEntry; 745 746 ff_apply_vector_2x2(roq, subX , subY , 747 roq->cb2x2 + qcell->idx[0]); 748 ff_apply_vector_2x2(roq, subX+2, subY , 749 roq->cb2x2 + qcell->idx[1]); 750 ff_apply_vector_2x2(roq, subX , subY+2, 751 roq->cb2x2 + qcell->idx[2]); 752 ff_apply_vector_2x2(roq, subX+2, subY+2, 753 roq->cb2x2 + qcell->idx[3]); 754 break; 755 756 case RoQ_ID_CCC: 757 for (k=0; k<4; k++) { 758 int cb_idx = eval->subCels[j].subCels[k]; 759 bytestream_put_byte(&spool.args, 760 tempData->i2f2[cb_idx]); 761 762 ff_apply_vector_2x2(roq, subX + 2*(k&1), subY + (k&2), 763 roq->cb2x2 + cb_idx); 764 } 765 break; 766 } 767 write_typecode(&spool, eval->subCels[j].best_coding); 768 } 769 break; 770 } 771 } 772 773 /* Flush the remainder of the argument/type spool */ 774 while (spool.typeSpoolLength) 775 write_typecode(&spool, 0x0); 776} 777 778 779/** 780 * Create a single YUV cell from a 2x2 section of the image 781 */ 782static inline void frame_block_to_cell(int *block, uint8_t * const *data, 783 int top, int left, const int *stride) 784{ 785 int i, j, u=0, v=0; 786 787 for (i=0; i<2; i++) 788 for (j=0; j<2; j++) { 789 int x = (top+i)*stride[0] + left + j; 790 *block++ = data[0][x]; 791 x = (top+i)*stride[1] + left + j; 792 u += data[1][x]; 793 v += data[2][x]; 794 } 795 796 *block++ = (u + 2) / 4 * CHROMA_BIAS; 797 *block++ = (v + 2) / 4 * CHROMA_BIAS; 798} 799 800/** 801 * Create YUV clusters for the entire image 802 */ 803static void create_clusters(const AVFrame *frame, int w, int h, int *points) 804{ 805 int i, j, k, l; 806 807 for (i=0; i<h; i+=4) 808 for (j=0; j<w; j+=4) { 809 for (k=0; k < 2; k++) 810 for (l=0; l < 2; l++) 811 frame_block_to_cell(points + (l + 2*k)*6, frame->data, 812 i+2*k, j+2*l, frame->linesize); 813 points += 24; 814 } 815} 816 817static int generate_codebook(RoqEncContext *enc, 818 int *points, int inputCount, roq_cell *results, 819 int size, int cbsize) 820{ 821 int i, j, k, ret = 0; 822 int c_size = size*size/4; 823 int *buf; 824 int *codebook = enc->tmp_codebook_buf; 825 int *closest_cb = enc->closest_cb; 826 827 ret = avpriv_elbg_do(&enc->elbg, points, 6 * c_size, inputCount, codebook, 828 cbsize, 1, closest_cb, &enc->randctx, 0); 829 if (ret < 0) 830 return ret; 831 832 buf = codebook; 833 for (i=0; i<cbsize; i++) 834 for (k=0; k<c_size; k++) { 835 for(j=0; j<4; j++) 836 results->y[j] = *buf++; 837 838 results->u = (*buf++ + CHROMA_BIAS/2)/CHROMA_BIAS; 839 results->v = (*buf++ + CHROMA_BIAS/2)/CHROMA_BIAS; 840 results++; 841 } 842 return 0; 843} 844 845static int generate_new_codebooks(RoqEncContext *enc) 846{ 847 int i, j, ret = 0; 848 RoqCodebooks *codebooks = &enc->tmp_data.codebooks; 849 RoqContext *const roq = &enc->common; 850 int max = roq->width * roq->height / 16; 851 uint8_t mb2[3*4]; 852 int *points = enc->points; 853 854 /* Subsample YUV data */ 855 create_clusters(enc->frame_to_enc, roq->width, roq->height, points); 856 857 codebooks->numCB4 = (enc->quake3_compat ? MAX_CBS_4x4-1 : MAX_CBS_4x4); 858 859 /* Create 4x4 codebooks */ 860 if ((ret = generate_codebook(enc, points, max, enc->results4, 861 4, codebooks->numCB4)) < 0) 862 return ret; 863 864 /* Create 2x2 codebooks */ 865 if ((ret = generate_codebook(enc, points, max * 4, 866 roq->cb2x2, 2, MAX_CBS_2x2)) < 0) 867 return ret; 868 869 codebooks->numCB2 = MAX_CBS_2x2; 870 871 /* Unpack 2x2 codebook clusters */ 872 for (i=0; i<codebooks->numCB2; i++) 873 unpack_roq_cell(roq->cb2x2 + i, codebooks->unpacked_cb2 + i*2*2*3); 874 875 /* Index all 4x4 entries to the 2x2 entries, unpack, and enlarge */ 876 for (i=0; i<codebooks->numCB4; i++) { 877 for (j=0; j<4; j++) { 878 unpack_roq_cell(&enc->results4[4*i + j], mb2); 879 index_mb(mb2, codebooks->unpacked_cb2, codebooks->numCB2, 880 &roq->cb4x4[i].idx[j], 2); 881 } 882 unpack_roq_qcell(codebooks->unpacked_cb2, roq->cb4x4 + i, 883 codebooks->unpacked_cb4 + i*4*4*3); 884 enlarge_roq_mb4(codebooks->unpacked_cb4 + i*4*4*3, 885 codebooks->unpacked_cb4_enlarged + i*8*8*3); 886 } 887 888 return 0; 889} 890 891static int roq_encode_video(RoqEncContext *enc) 892{ 893 RoqTempData *const tempData = &enc->tmp_data; 894 RoqContext *const roq = &enc->common; 895 int ret; 896 897 memset(tempData, 0, sizeof(*tempData)); 898 899 ret = generate_new_codebooks(enc); 900 if (ret < 0) 901 return ret; 902 903 if (enc->framesSinceKeyframe >= 1) { 904 motion_search(enc, 8); 905 motion_search(enc, 4); 906 } 907 908 retry_encode: 909 for (int i = 0; i < roq->width * roq->height / 64; i++) 910 gather_data_for_cel(enc->cel_evals + i, enc); 911 912 /* Quake 3 can't handle chunks bigger than 65535 bytes */ 913 if (tempData->mainChunkSize/8 > 65535 && enc->quake3_compat) { 914 if (enc->lambda > 100000) { 915 av_log(roq->avctx, AV_LOG_ERROR, "Cannot encode video in Quake compatible form\n"); 916 return AVERROR(EINVAL); 917 } 918 av_log(roq->avctx, AV_LOG_ERROR, 919 "Warning, generated a frame too big for Quake (%d > 65535), " 920 "now switching to a bigger qscale value.\n", 921 tempData->mainChunkSize/8); 922 enc->lambda *= 1.5; 923 tempData->mainChunkSize = 0; 924 memset(tempData->used_option, 0, sizeof(tempData->used_option)); 925 memset(tempData->codebooks.usedCB4, 0, 926 sizeof(tempData->codebooks.usedCB4)); 927 memset(tempData->codebooks.usedCB2, 0, 928 sizeof(tempData->codebooks.usedCB2)); 929 930 goto retry_encode; 931 } 932 933 remap_codebooks(enc); 934 935 write_codebooks(enc); 936 937 reconstruct_and_encode_image(enc, roq->width, roq->height, 938 roq->width * roq->height / 64); 939 940 /* Rotate frame history */ 941 FFSWAP(AVFrame *, roq->current_frame, roq->last_frame); 942 FFSWAP(motion_vect *, enc->last_motion4, enc->this_motion4); 943 FFSWAP(motion_vect *, enc->last_motion8, enc->this_motion8); 944 945 enc->framesSinceKeyframe++; 946 947 return 0; 948} 949 950static av_cold int roq_encode_end(AVCodecContext *avctx) 951{ 952 RoqEncContext *const enc = avctx->priv_data; 953 954 av_frame_free(&enc->common.current_frame); 955 av_frame_free(&enc->common.last_frame); 956 957 av_freep(&enc->cel_evals); 958 av_freep(&enc->closest_cb); 959 av_freep(&enc->this_motion4); 960 av_freep(&enc->last_motion4); 961 av_freep(&enc->this_motion8); 962 av_freep(&enc->last_motion8); 963 964 avpriv_elbg_free(&enc->elbg); 965 966 return 0; 967} 968 969static av_cold int roq_encode_init(AVCodecContext *avctx) 970{ 971 RoqEncContext *const enc = avctx->priv_data; 972 RoqContext *const roq = &enc->common; 973 974 av_lfg_init(&enc->randctx, 1); 975 976 roq->avctx = avctx; 977 978 enc->framesSinceKeyframe = 0; 979 if ((avctx->width & 0xf) || (avctx->height & 0xf)) { 980 av_log(avctx, AV_LOG_ERROR, "Dimensions must be divisible by 16\n"); 981 return AVERROR(EINVAL); 982 } 983 984 if (avctx->width > 65535 || avctx->height > 65535) { 985 av_log(avctx, AV_LOG_ERROR, "Dimensions are max %d\n", enc->quake3_compat ? 32768 : 65535); 986 return AVERROR(EINVAL); 987 } 988 989 if (((avctx->width)&(avctx->width-1))||((avctx->height)&(avctx->height-1))) 990 av_log(avctx, AV_LOG_ERROR, "Warning: dimensions not power of two, this is not supported by quake\n"); 991 992 roq->width = avctx->width; 993 roq->height = avctx->height; 994 995 enc->framesSinceKeyframe = 0; 996 enc->first_frame = 1; 997 998 roq->last_frame = av_frame_alloc(); 999 roq->current_frame = av_frame_alloc(); 1000 if (!roq->last_frame || !roq->current_frame) 1001 return AVERROR(ENOMEM); 1002 1003 enc->this_motion4 = 1004 av_calloc(roq->width * roq->height / 16, sizeof(*enc->this_motion4)); 1005 1006 enc->last_motion4 = 1007 av_malloc_array (roq->width * roq->height / 16, sizeof(motion_vect)); 1008 1009 enc->this_motion8 = 1010 av_calloc(roq->width * roq->height / 64, sizeof(*enc->this_motion8)); 1011 1012 enc->last_motion8 = 1013 av_malloc_array (roq->width * roq->height / 64, sizeof(motion_vect)); 1014 1015 /* 4x4 codebook needs 6 * 4 * 4 / 4 * width * height / 16 * sizeof(int); 1016 * and so does the points buffer. */ 1017 enc->closest_cb = 1018 av_malloc_array(roq->width * roq->height, 3 * sizeof(int)); 1019 1020 if (!enc->this_motion4 || !enc->last_motion4 || 1021 !enc->this_motion8 || !enc->last_motion8 || !enc->closest_cb) 1022 return AVERROR(ENOMEM); 1023 1024 enc->points = enc->closest_cb + roq->width * roq->height * 3 / 2; 1025 1026 return create_cel_evals(enc); 1027} 1028 1029static void roq_write_video_info_chunk(RoqEncContext *enc) 1030{ 1031 /* ROQ info chunk */ 1032 bytestream_put_le16(&enc->out_buf, RoQ_INFO); 1033 1034 /* Size: 8 bytes */ 1035 bytestream_put_le32(&enc->out_buf, 8); 1036 1037 /* Unused argument */ 1038 bytestream_put_byte(&enc->out_buf, 0x00); 1039 bytestream_put_byte(&enc->out_buf, 0x00); 1040 1041 /* Width */ 1042 bytestream_put_le16(&enc->out_buf, enc->common.width); 1043 1044 /* Height */ 1045 bytestream_put_le16(&enc->out_buf, enc->common.height); 1046 1047 /* Unused in Quake 3, mimics the output of the real encoder */ 1048 bytestream_put_byte(&enc->out_buf, 0x08); 1049 bytestream_put_byte(&enc->out_buf, 0x00); 1050 bytestream_put_byte(&enc->out_buf, 0x04); 1051 bytestream_put_byte(&enc->out_buf, 0x00); 1052} 1053 1054static int roq_encode_frame(AVCodecContext *avctx, AVPacket *pkt, 1055 const AVFrame *frame, int *got_packet) 1056{ 1057 RoqEncContext *const enc = avctx->priv_data; 1058 RoqContext *const roq = &enc->common; 1059 int size, ret; 1060 1061 roq->avctx = avctx; 1062 1063 enc->frame_to_enc = frame; 1064 1065 if (frame->quality) 1066 enc->lambda = frame->quality - 1; 1067 else 1068 enc->lambda = 2*ROQ_LAMBDA_SCALE; 1069 1070 /* 138 bits max per 8x8 block + 1071 * 256 codebooks*(6 bytes 2x2 + 4 bytes 4x4) + 8 bytes frame header */ 1072 size = ((roq->width * roq->height / 64) * 138 + 7) / 8 + 256 * (6 + 4) + 8; 1073 if ((ret = ff_alloc_packet(avctx, pkt, size)) < 0) 1074 return ret; 1075 enc->out_buf = pkt->data; 1076 1077 /* Check for I-frame */ 1078 if (enc->framesSinceKeyframe == avctx->gop_size) 1079 enc->framesSinceKeyframe = 0; 1080 1081 if (enc->first_frame) { 1082 /* Alloc memory for the reconstruction data (we must know the stride 1083 for that) */ 1084 if ((ret = ff_encode_alloc_frame(avctx, roq->current_frame)) < 0 || 1085 (ret = ff_encode_alloc_frame(avctx, roq->last_frame )) < 0) 1086 return ret; 1087 1088 /* Before the first video frame, write a "video info" chunk */ 1089 roq_write_video_info_chunk(enc); 1090 1091 enc->first_frame = 0; 1092 } 1093 1094 /* Encode the actual frame */ 1095 ret = roq_encode_video(enc); 1096 if (ret < 0) 1097 return ret; 1098 1099 pkt->size = enc->out_buf - pkt->data; 1100 if (enc->framesSinceKeyframe == 1) 1101 pkt->flags |= AV_PKT_FLAG_KEY; 1102 *got_packet = 1; 1103 1104 return 0; 1105} 1106 1107#define OFFSET(x) offsetof(RoqEncContext, x) 1108#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM 1109static const AVOption options[] = { 1110 { "quake3_compat", "Whether to respect known limitations in Quake 3 decoder", OFFSET(quake3_compat), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, VE }, 1111 { NULL }, 1112}; 1113 1114static const AVClass roq_class = { 1115 .class_name = "RoQ", 1116 .item_name = av_default_item_name, 1117 .option = options, 1118 .version = LIBAVUTIL_VERSION_INT, 1119}; 1120 1121const FFCodec ff_roq_encoder = { 1122 .p.name = "roqvideo", 1123 .p.long_name = NULL_IF_CONFIG_SMALL("id RoQ video"), 1124 .p.type = AVMEDIA_TYPE_VIDEO, 1125 .p.id = AV_CODEC_ID_ROQ, 1126 .priv_data_size = sizeof(RoqEncContext), 1127 .init = roq_encode_init, 1128 FF_CODEC_ENCODE_CB(roq_encode_frame), 1129 .close = roq_encode_end, 1130 .p.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUVJ444P, 1131 AV_PIX_FMT_NONE }, 1132 .p.priv_class = &roq_class, 1133 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP, 1134}; 1135