1/* 2 * Resolume DXV decoder 3 * Copyright (C) 2015 Vittorio Giovara <vittorio.giovara@gmail.com> 4 * Copyright (C) 2018 Paul B Mahol 5 * 6 * This file is part of FFmpeg. 7 * 8 * FFmpeg is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2.1 of the License, or (at your option) any later version. 12 * 13 * FFmpeg is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with FFmpeg; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22 23#include <stdint.h> 24 25#include "libavutil/imgutils.h" 26 27#include "mathops.h" 28#include "avcodec.h" 29#include "bytestream.h" 30#include "codec_internal.h" 31#include "lzf.h" 32#include "texturedsp.h" 33#include "thread.h" 34 35typedef struct DXVContext { 36 TextureDSPContext texdsp; 37 GetByteContext gbc; 38 39 uint8_t *tex_data; // Compressed texture 40 uint8_t *ctex_data; // Compressed texture 41 int tex_rat; // Compression ratio 42 int tex_step; // Distance between blocks 43 int ctex_step; // Distance between blocks 44 int64_t tex_size; // Texture size 45 int64_t ctex_size; // Texture size 46 47 /* Optimal number of slices for parallel decoding */ 48 int slice_count; 49 50 uint8_t *op_data[4]; // Opcodes 51 int64_t op_size[4]; // Opcodes size 52 53 int texture_block_w; 54 int texture_block_h; 55 56 int ctexture_block_w; 57 int ctexture_block_h; 58 59 /* Pointer to the selected decompression function */ 60 int (*tex_funct)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block); 61 int (*tex_funct_planar[2])(uint8_t *plane0, ptrdiff_t stride0, 62 uint8_t *plane1, ptrdiff_t stride1, 63 const uint8_t *block); 64} DXVContext; 65 66static void decompress_indices(uint8_t *dst, const uint8_t *src) 67{ 68 int block, i; 69 70 for (block = 0; block < 2; block++) { 71 int tmp = AV_RL24(src); 72 73 /* Unpack 8x3 bit from last 3 byte block */ 74 for (i = 0; i < 8; i++) 75 dst[i] = (tmp >> (i * 3)) & 0x7; 76 77 src += 3; 78 dst += 8; 79 } 80} 81 82static int extract_component(int yo0, int yo1, int code) 83{ 84 int yo; 85 86 if (yo0 == yo1) { 87 yo = yo0; 88 } else if (code == 0) { 89 yo = yo0; 90 } else if (code == 1) { 91 yo = yo1; 92 } else { 93 if (yo0 > yo1) { 94 yo = (uint8_t) (((8 - code) * yo0 + 95 (code - 1) * yo1) / 7); 96 } else { 97 if (code == 6) { 98 yo = 0; 99 } else if (code == 7) { 100 yo = 255; 101 } else { 102 yo = (uint8_t) (((6 - code) * yo0 + 103 (code - 1) * yo1) / 5); 104 } 105 } 106 } 107 108 return yo; 109} 110 111static int cocg_block(uint8_t *plane0, ptrdiff_t stride0, 112 uint8_t *plane1, ptrdiff_t stride1, 113 const uint8_t *block) 114{ 115 uint8_t co_indices[16]; 116 uint8_t cg_indices[16]; 117 uint8_t co0 = *(block); 118 uint8_t co1 = *(block + 1); 119 uint8_t cg0 = *(block + 8); 120 uint8_t cg1 = *(block + 9); 121 int x, y; 122 123 decompress_indices(co_indices, block + 2); 124 decompress_indices(cg_indices, block + 10); 125 126 for (y = 0; y < 4; y++) { 127 for (x = 0; x < 4; x++) { 128 int co_code = co_indices[x + y * 4]; 129 int cg_code = cg_indices[x + y * 4]; 130 131 plane0[x] = extract_component(cg0, cg1, cg_code); 132 plane1[x] = extract_component(co0, co1, co_code); 133 } 134 plane0 += stride0; 135 plane1 += stride1; 136 } 137 138 return 16; 139} 140 141static void yao_subblock(uint8_t *dst, uint8_t *yo_indices, 142 ptrdiff_t stride, const uint8_t *block) 143{ 144 uint8_t yo0 = *(block); 145 uint8_t yo1 = *(block + 1); 146 int x, y; 147 148 decompress_indices(yo_indices, block + 2); 149 150 for (y = 0; y < 4; y++) { 151 for (x = 0; x < 4; x++) { 152 int yo_code = yo_indices[x + y * 4]; 153 154 dst[x] = extract_component(yo0, yo1, yo_code); 155 } 156 dst += stride; 157 } 158} 159 160static int yo_block(uint8_t *dst, ptrdiff_t stride, 161 uint8_t *unused0, ptrdiff_t unused1, 162 const uint8_t *block) 163{ 164 uint8_t yo_indices[16]; 165 166 yao_subblock(dst, yo_indices, stride, block); 167 yao_subblock(dst + 4, yo_indices, stride, block + 8); 168 yao_subblock(dst + 8, yo_indices, stride, block + 16); 169 yao_subblock(dst + 12, yo_indices, stride, block + 24); 170 171 return 32; 172} 173 174static int yao_block(uint8_t *plane0, ptrdiff_t stride0, 175 uint8_t *plane3, ptrdiff_t stride1, 176 const uint8_t *block) 177{ 178 uint8_t yo_indices[16]; 179 uint8_t a_indices[16]; 180 181 yao_subblock(plane0, yo_indices, stride0, block); 182 yao_subblock(plane3, a_indices, stride1, block + 8); 183 yao_subblock(plane0 + 4, yo_indices, stride0, block + 16); 184 yao_subblock(plane3 + 4, a_indices, stride1, block + 24); 185 yao_subblock(plane0 + 8, yo_indices, stride0, block + 32); 186 yao_subblock(plane3 + 8, a_indices, stride1, block + 40); 187 yao_subblock(plane0 + 12, yo_indices, stride0, block + 48); 188 yao_subblock(plane3 + 12, a_indices, stride1, block + 56); 189 190 return 64; 191} 192 193static int decompress_texture_thread(AVCodecContext *avctx, void *arg, 194 int slice, int thread_nb) 195{ 196 DXVContext *ctx = avctx->priv_data; 197 AVFrame *frame = arg; 198 const uint8_t *d = ctx->tex_data; 199 int w_block = avctx->coded_width / ctx->texture_block_w; 200 int h_block = avctx->coded_height / ctx->texture_block_h; 201 int x, y; 202 int start_slice, end_slice; 203 204 start_slice = h_block * slice / ctx->slice_count; 205 end_slice = h_block * (slice + 1) / ctx->slice_count; 206 207 if (ctx->tex_funct) { 208 for (y = start_slice; y < end_slice; y++) { 209 uint8_t *p = frame->data[0] + y * frame->linesize[0] * ctx->texture_block_h; 210 int off = y * w_block; 211 for (x = 0; x < w_block; x++) { 212 ctx->tex_funct(p + x * 4 * ctx->texture_block_w, frame->linesize[0], 213 d + (off + x) * ctx->tex_step); 214 } 215 } 216 } else { 217 const uint8_t *c = ctx->ctex_data; 218 219 for (y = start_slice; y < end_slice; y++) { 220 uint8_t *p0 = frame->data[0] + y * frame->linesize[0] * ctx->texture_block_h; 221 uint8_t *p3 = ctx->tex_step != 64 ? NULL : frame->data[3] + y * frame->linesize[3] * ctx->texture_block_h; 222 int off = y * w_block; 223 for (x = 0; x < w_block; x++) { 224 ctx->tex_funct_planar[0](p0 + x * ctx->texture_block_w, frame->linesize[0], 225 p3 != NULL ? p3 + x * ctx->texture_block_w : NULL, frame->linesize[3], 226 d + (off + x) * ctx->tex_step); 227 } 228 } 229 230 w_block = (avctx->coded_width / 2) / ctx->ctexture_block_w; 231 h_block = (avctx->coded_height / 2) / ctx->ctexture_block_h; 232 start_slice = h_block * slice / ctx->slice_count; 233 end_slice = h_block * (slice + 1) / ctx->slice_count; 234 235 for (y = start_slice; y < end_slice; y++) { 236 uint8_t *p0 = frame->data[1] + y * frame->linesize[1] * ctx->ctexture_block_h; 237 uint8_t *p1 = frame->data[2] + y * frame->linesize[2] * ctx->ctexture_block_h; 238 int off = y * w_block; 239 for (x = 0; x < w_block; x++) { 240 ctx->tex_funct_planar[1](p0 + x * ctx->ctexture_block_w, frame->linesize[1], 241 p1 + x * ctx->ctexture_block_w, frame->linesize[2], 242 c + (off + x) * ctx->ctex_step); 243 } 244 } 245 } 246 247 return 0; 248} 249 250/* This scheme addresses already decoded elements depending on 2-bit status: 251 * 0 -> copy new element 252 * 1 -> copy one element from position -x 253 * 2 -> copy one element from position -(get_byte() + 2) * x 254 * 3 -> copy one element from position -(get_16le() + 0x102) * x 255 * x is always 2 for dxt1 and 4 for dxt5. */ 256#define CHECKPOINT(x) \ 257 do { \ 258 if (state == 0) { \ 259 if (bytestream2_get_bytes_left(gbc) < 4) \ 260 return AVERROR_INVALIDDATA; \ 261 value = bytestream2_get_le32(gbc); \ 262 state = 16; \ 263 } \ 264 op = value & 0x3; \ 265 value >>= 2; \ 266 state--; \ 267 switch (op) { \ 268 case 1: \ 269 idx = x; \ 270 break; \ 271 case 2: \ 272 idx = (bytestream2_get_byte(gbc) + 2) * x; \ 273 if (idx > pos) { \ 274 av_log(avctx, AV_LOG_ERROR, "idx %d > %d\n", idx, pos); \ 275 return AVERROR_INVALIDDATA; \ 276 } \ 277 break; \ 278 case 3: \ 279 idx = (bytestream2_get_le16(gbc) + 0x102) * x; \ 280 if (idx > pos) { \ 281 av_log(avctx, AV_LOG_ERROR, "idx %d > %d\n", idx, pos); \ 282 return AVERROR_INVALIDDATA; \ 283 } \ 284 break; \ 285 } \ 286 } while(0) 287 288static int dxv_decompress_dxt1(AVCodecContext *avctx) 289{ 290 DXVContext *ctx = avctx->priv_data; 291 GetByteContext *gbc = &ctx->gbc; 292 uint32_t value, prev, op; 293 int idx = 0, state = 0; 294 int pos = 2; 295 296 /* Copy the first two elements */ 297 AV_WL32(ctx->tex_data, bytestream2_get_le32(gbc)); 298 AV_WL32(ctx->tex_data + 4, bytestream2_get_le32(gbc)); 299 300 /* Process input until the whole texture has been filled */ 301 while (pos + 2 <= ctx->tex_size / 4) { 302 CHECKPOINT(2); 303 304 /* Copy two elements from a previous offset or from the input buffer */ 305 if (op) { 306 prev = AV_RL32(ctx->tex_data + 4 * (pos - idx)); 307 AV_WL32(ctx->tex_data + 4 * pos, prev); 308 pos++; 309 310 prev = AV_RL32(ctx->tex_data + 4 * (pos - idx)); 311 AV_WL32(ctx->tex_data + 4 * pos, prev); 312 pos++; 313 } else { 314 CHECKPOINT(2); 315 316 if (op) 317 prev = AV_RL32(ctx->tex_data + 4 * (pos - idx)); 318 else 319 prev = bytestream2_get_le32(gbc); 320 AV_WL32(ctx->tex_data + 4 * pos, prev); 321 pos++; 322 323 CHECKPOINT(2); 324 325 if (op) 326 prev = AV_RL32(ctx->tex_data + 4 * (pos - idx)); 327 else 328 prev = bytestream2_get_le32(gbc); 329 AV_WL32(ctx->tex_data + 4 * pos, prev); 330 pos++; 331 } 332 } 333 334 return 0; 335} 336 337typedef struct OpcodeTable { 338 int16_t next; 339 uint8_t val1; 340 uint8_t val2; 341} OpcodeTable; 342 343static int fill_ltable(GetByteContext *gb, uint32_t *table, int *nb_elements) 344{ 345 unsigned half = 512, bits = 1023, left = 1024, input, mask; 346 int value, counter = 0, rshift = 10, lshift = 30; 347 348 mask = bytestream2_get_le32(gb) >> 2; 349 while (left) { 350 if (counter >= 256) 351 return AVERROR_INVALIDDATA; 352 value = bits & mask; 353 left -= bits & mask; 354 mask >>= rshift; 355 lshift -= rshift; 356 table[counter++] = value; 357 if (lshift < 16) { 358 if (bytestream2_get_bytes_left(gb) <= 0) 359 return AVERROR_INVALIDDATA; 360 361 input = bytestream2_get_le16(gb); 362 mask += input << lshift; 363 lshift += 16; 364 } 365 if (left < half) { 366 half >>= 1; 367 bits >>= 1; 368 rshift--; 369 } 370 } 371 372 for (; !table[counter - 1]; counter--) 373 if (counter <= 0) 374 return AVERROR_INVALIDDATA; 375 376 *nb_elements = counter; 377 378 if (counter < 256) 379 memset(&table[counter], 0, 4 * (256 - counter)); 380 381 if (lshift >= 16) 382 bytestream2_seek(gb, -2, SEEK_CUR); 383 384 return 0; 385} 386 387static int fill_optable(unsigned *table0, OpcodeTable *table1, int nb_elements) 388{ 389 unsigned table2[256] = { 0 }; 390 unsigned x = 0; 391 int val0, val1, i, j = 2, k = 0; 392 393 table2[0] = table0[0]; 394 for (i = 0; i < nb_elements - 1; i++, table2[i] = val0) { 395 val0 = table0[i + 1] + table2[i]; 396 } 397 398 if (!table2[0]) { 399 do { 400 k++; 401 } while (!table2[k]); 402 } 403 404 j = 2; 405 for (i = 1024; i > 0; i--) { 406 for (table1[x].val1 = k; k < 256 && j > table2[k]; k++); 407 x = (x - 383) & 0x3FF; 408 j++; 409 } 410 411 if (nb_elements > 0) 412 memcpy(&table2[0], table0, 4 * nb_elements); 413 414 for (i = 0; i < 1024; i++) { 415 val0 = table1[i].val1; 416 val1 = table2[val0]; 417 table2[val0]++; 418 x = 31 - ff_clz(val1); 419 if (x > 10) 420 return AVERROR_INVALIDDATA; 421 table1[i].val2 = 10 - x; 422 table1[i].next = (val1 << table1[i].val2) - 1024; 423 } 424 425 return 0; 426} 427 428static int get_opcodes(GetByteContext *gb, uint32_t *table, uint8_t *dst, int op_size, int nb_elements) 429{ 430 OpcodeTable optable[1024]; 431 int sum, x, val, lshift, rshift, ret, i, idx; 432 int64_t size_in_bits; 433 unsigned endoffset, newoffset, offset; 434 unsigned next; 435 uint8_t *src = (uint8_t *)gb->buffer; 436 437 ret = fill_optable(table, optable, nb_elements); 438 if (ret < 0) 439 return ret; 440 441 size_in_bits = bytestream2_get_le32(gb); 442 endoffset = ((size_in_bits + 7) >> 3) - 4; 443 if (endoffset <= 0 || bytestream2_get_bytes_left(gb) < endoffset) 444 return AVERROR_INVALIDDATA; 445 446 offset = endoffset; 447 next = AV_RL32(src + endoffset); 448 rshift = (((size_in_bits & 0xFF) - 1) & 7) + 15; 449 lshift = 32 - rshift; 450 idx = (next >> rshift) & 0x3FF; 451 for (i = 0; i < op_size; i++) { 452 dst[i] = optable[idx].val1; 453 val = optable[idx].val2; 454 sum = val + lshift; 455 x = (next << lshift) >> 1 >> (31 - val); 456 newoffset = offset - (sum >> 3); 457 lshift = sum & 7; 458 idx = x + optable[idx].next; 459 offset = newoffset; 460 if (offset > endoffset) 461 return AVERROR_INVALIDDATA; 462 next = AV_RL32(src + offset); 463 } 464 465 bytestream2_skip(gb, (size_in_bits + 7 >> 3) - 4); 466 467 return 0; 468} 469 470static int dxv_decompress_opcodes(GetByteContext *gb, void *dstp, size_t op_size) 471{ 472 int pos = bytestream2_tell(gb); 473 int flag = bytestream2_peek_byte(gb); 474 475 if ((flag & 3) == 0) { 476 bytestream2_skip(gb, 1); 477 bytestream2_get_buffer(gb, dstp, op_size); 478 } else if ((flag & 3) == 1) { 479 bytestream2_skip(gb, 1); 480 memset(dstp, bytestream2_get_byte(gb), op_size); 481 } else { 482 uint32_t table[256]; 483 int ret, elements = 0; 484 485 ret = fill_ltable(gb, table, &elements); 486 if (ret < 0) 487 return ret; 488 ret = get_opcodes(gb, table, dstp, op_size, elements); 489 if (ret < 0) 490 return ret; 491 } 492 return bytestream2_tell(gb) - pos; 493} 494 495static int dxv_decompress_cgo(DXVContext *ctx, GetByteContext *gb, 496 uint8_t *tex_data, int tex_size, 497 uint8_t *op_data, int *oindex, 498 int op_size, 499 uint8_t **dstp, int *statep, 500 uint8_t **tab0, uint8_t **tab1, 501 int offset) 502{ 503 uint8_t *dst = *dstp; 504 uint8_t *tptr0, *tptr1, *tptr3; 505 int oi = *oindex; 506 int state = *statep; 507 int opcode, v, vv; 508 509 if (state <= 0) { 510 if (oi >= op_size) 511 return AVERROR_INVALIDDATA; 512 opcode = op_data[oi++]; 513 if (!opcode) { 514 v = bytestream2_get_byte(gb); 515 if (v == 255) { 516 do { 517 if (bytestream2_get_bytes_left(gb) <= 0) 518 return AVERROR_INVALIDDATA; 519 opcode = bytestream2_get_le16(gb); 520 v += opcode; 521 } while (opcode == 0xFFFF); 522 } 523 AV_WL32(dst, AV_RL32(dst - (8 + offset))); 524 AV_WL32(dst + 4, AV_RL32(dst - (4 + offset))); 525 state = v + 4; 526 goto done; 527 } 528 529 switch (opcode) { 530 case 1: 531 AV_WL32(dst, AV_RL32(dst - (8 + offset))); 532 AV_WL32(dst + 4, AV_RL32(dst - (4 + offset))); 533 break; 534 case 2: 535 vv = (8 + offset) * (bytestream2_get_le16(gb) + 1); 536 if (vv < 0 || vv > dst - tex_data) 537 return AVERROR_INVALIDDATA; 538 tptr0 = dst - vv; 539 v = AV_RL32(tptr0); 540 AV_WL32(dst, AV_RL32(tptr0)); 541 AV_WL32(dst + 4, AV_RL32(tptr0 + 4)); 542 tab0[0x9E3779B1 * (uint16_t)v >> 24] = dst; 543 tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFFu) >> 24] = dst + 2; 544 break; 545 case 3: 546 AV_WL32(dst, bytestream2_get_le32(gb)); 547 AV_WL32(dst + 4, bytestream2_get_le32(gb)); 548 tab0[0x9E3779B1 * AV_RL16(dst) >> 24] = dst; 549 tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFFu) >> 24] = dst + 2; 550 break; 551 case 4: 552 tptr3 = tab1[bytestream2_get_byte(gb)]; 553 if (!tptr3) 554 return AVERROR_INVALIDDATA; 555 AV_WL16(dst, bytestream2_get_le16(gb)); 556 AV_WL16(dst + 2, AV_RL16(tptr3)); 557 dst[4] = tptr3[2]; 558 AV_WL16(dst + 5, bytestream2_get_le16(gb)); 559 dst[7] = bytestream2_get_byte(gb); 560 tab0[0x9E3779B1 * AV_RL16(dst) >> 24] = dst; 561 break; 562 case 5: 563 tptr3 = tab1[bytestream2_get_byte(gb)]; 564 if (!tptr3) 565 return AVERROR_INVALIDDATA; 566 AV_WL16(dst, bytestream2_get_le16(gb)); 567 AV_WL16(dst + 2, bytestream2_get_le16(gb)); 568 dst[4] = bytestream2_get_byte(gb); 569 AV_WL16(dst + 5, AV_RL16(tptr3)); 570 dst[7] = tptr3[2]; 571 tab0[0x9E3779B1 * AV_RL16(dst) >> 24] = dst; 572 tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFFu) >> 24] = dst + 2; 573 break; 574 case 6: 575 tptr0 = tab1[bytestream2_get_byte(gb)]; 576 if (!tptr0) 577 return AVERROR_INVALIDDATA; 578 tptr1 = tab1[bytestream2_get_byte(gb)]; 579 if (!tptr1) 580 return AVERROR_INVALIDDATA; 581 AV_WL16(dst, bytestream2_get_le16(gb)); 582 AV_WL16(dst + 2, AV_RL16(tptr0)); 583 dst[4] = tptr0[2]; 584 AV_WL16(dst + 5, AV_RL16(tptr1)); 585 dst[7] = tptr1[2]; 586 tab0[0x9E3779B1 * AV_RL16(dst) >> 24] = dst; 587 break; 588 case 7: 589 v = (8 + offset) * (bytestream2_get_le16(gb) + 1); 590 if (v < 0 || v > dst - tex_data) 591 return AVERROR_INVALIDDATA; 592 tptr0 = dst - v; 593 AV_WL16(dst, bytestream2_get_le16(gb)); 594 AV_WL16(dst + 2, AV_RL16(tptr0 + 2)); 595 AV_WL32(dst + 4, AV_RL32(tptr0 + 4)); 596 tab0[0x9E3779B1 * AV_RL16(dst) >> 24] = dst; 597 tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFFu) >> 24] = dst + 2; 598 break; 599 case 8: 600 tptr1 = tab0[bytestream2_get_byte(gb)]; 601 if (!tptr1) 602 return AVERROR_INVALIDDATA; 603 AV_WL16(dst, AV_RL16(tptr1)); 604 AV_WL16(dst + 2, bytestream2_get_le16(gb)); 605 AV_WL32(dst + 4, bytestream2_get_le32(gb)); 606 tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFFu) >> 24] = dst + 2; 607 break; 608 case 9: 609 tptr1 = tab0[bytestream2_get_byte(gb)]; 610 if (!tptr1) 611 return AVERROR_INVALIDDATA; 612 tptr3 = tab1[bytestream2_get_byte(gb)]; 613 if (!tptr3) 614 return AVERROR_INVALIDDATA; 615 AV_WL16(dst, AV_RL16(tptr1)); 616 AV_WL16(dst + 2, AV_RL16(tptr3)); 617 dst[4] = tptr3[2]; 618 AV_WL16(dst + 5, bytestream2_get_le16(gb)); 619 dst[7] = bytestream2_get_byte(gb); 620 tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFFu) >> 24] = dst + 2; 621 break; 622 case 10: 623 tptr1 = tab0[bytestream2_get_byte(gb)]; 624 if (!tptr1) 625 return AVERROR_INVALIDDATA; 626 tptr3 = tab1[bytestream2_get_byte(gb)]; 627 if (!tptr3) 628 return AVERROR_INVALIDDATA; 629 AV_WL16(dst, AV_RL16(tptr1)); 630 AV_WL16(dst + 2, bytestream2_get_le16(gb)); 631 dst[4] = bytestream2_get_byte(gb); 632 AV_WL16(dst + 5, AV_RL16(tptr3)); 633 dst[7] = tptr3[2]; 634 tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFFu) >> 24] = dst + 2; 635 break; 636 case 11: 637 tptr0 = tab0[bytestream2_get_byte(gb)]; 638 if (!tptr0) 639 return AVERROR_INVALIDDATA; 640 tptr3 = tab1[bytestream2_get_byte(gb)]; 641 if (!tptr3) 642 return AVERROR_INVALIDDATA; 643 tptr1 = tab1[bytestream2_get_byte(gb)]; 644 if (!tptr1) 645 return AVERROR_INVALIDDATA; 646 AV_WL16(dst, AV_RL16(tptr0)); 647 AV_WL16(dst + 2, AV_RL16(tptr3)); 648 dst[4] = tptr3[2]; 649 AV_WL16(dst + 5, AV_RL16(tptr1)); 650 dst[7] = tptr1[2]; 651 break; 652 case 12: 653 tptr1 = tab0[bytestream2_get_byte(gb)]; 654 if (!tptr1) 655 return AVERROR_INVALIDDATA; 656 v = (8 + offset) * (bytestream2_get_le16(gb) + 1); 657 if (v < 0 || v > dst - tex_data) 658 return AVERROR_INVALIDDATA; 659 tptr0 = dst - v; 660 AV_WL16(dst, AV_RL16(tptr1)); 661 AV_WL16(dst + 2, AV_RL16(tptr0 + 2)); 662 AV_WL32(dst + 4, AV_RL32(tptr0 + 4)); 663 tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFFu) >> 24] = dst + 2; 664 break; 665 case 13: 666 AV_WL16(dst, AV_RL16(dst - (8 + offset))); 667 AV_WL16(dst + 2, bytestream2_get_le16(gb)); 668 AV_WL32(dst + 4, bytestream2_get_le32(gb)); 669 tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFFu) >> 24] = dst + 2; 670 break; 671 case 14: 672 tptr3 = tab1[bytestream2_get_byte(gb)]; 673 if (!tptr3) 674 return AVERROR_INVALIDDATA; 675 AV_WL16(dst, AV_RL16(dst - (8 + offset))); 676 AV_WL16(dst + 2, AV_RL16(tptr3)); 677 dst[4] = tptr3[2]; 678 AV_WL16(dst + 5, bytestream2_get_le16(gb)); 679 dst[7] = bytestream2_get_byte(gb); 680 tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFFu) >> 24] = dst + 2; 681 break; 682 case 15: 683 tptr3 = tab1[bytestream2_get_byte(gb)]; 684 if (!tptr3) 685 return AVERROR_INVALIDDATA; 686 AV_WL16(dst, AV_RL16(dst - (8 + offset))); 687 AV_WL16(dst + 2, bytestream2_get_le16(gb)); 688 dst[4] = bytestream2_get_byte(gb); 689 AV_WL16(dst + 5, AV_RL16(tptr3)); 690 dst[7] = tptr3[2]; 691 tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFFu) >> 24] = dst + 2; 692 break; 693 case 16: 694 tptr3 = tab1[bytestream2_get_byte(gb)]; 695 if (!tptr3) 696 return AVERROR_INVALIDDATA; 697 tptr1 = tab1[bytestream2_get_byte(gb)]; 698 if (!tptr1) 699 return AVERROR_INVALIDDATA; 700 AV_WL16(dst, AV_RL16(dst - (8 + offset))); 701 AV_WL16(dst + 2, AV_RL16(tptr3)); 702 dst[4] = tptr3[2]; 703 AV_WL16(dst + 5, AV_RL16(tptr1)); 704 dst[7] = tptr1[2]; 705 break; 706 case 17: 707 v = (8 + offset) * (bytestream2_get_le16(gb) + 1); 708 if (v < 0 || v > dst - tex_data) 709 return AVERROR_INVALIDDATA; 710 AV_WL16(dst, AV_RL16(dst - (8 + offset))); 711 AV_WL16(dst + 2, AV_RL16(&dst[-v + 2])); 712 AV_WL32(dst + 4, AV_RL32(&dst[-v + 4])); 713 tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFFu) >> 24] = dst + 2; 714 break; 715 default: 716 break; 717 } 718 } else { 719done: 720 AV_WL32(dst, AV_RL32(dst - (8 + offset))); 721 AV_WL32(dst + 4, AV_RL32(dst - (4 + offset))); 722 state--; 723 } 724 if (dst - tex_data + 8 > tex_size) 725 return AVERROR_INVALIDDATA; 726 dst += 8; 727 728 *oindex = oi; 729 *dstp = dst; 730 *statep = state; 731 732 return 0; 733} 734 735static int dxv_decompress_cocg(DXVContext *ctx, GetByteContext *gb, 736 uint8_t *tex_data, int tex_size, 737 uint8_t *op_data0, uint8_t *op_data1, 738 int max_op_size0, int max_op_size1) 739{ 740 uint8_t *dst, *tab2[256] = { 0 }, *tab0[256] = { 0 }, *tab3[256] = { 0 }, *tab1[256] = { 0 }; 741 int op_offset = bytestream2_get_le32(gb); 742 unsigned op_size0 = bytestream2_get_le32(gb); 743 unsigned op_size1 = bytestream2_get_le32(gb); 744 int data_start = bytestream2_tell(gb); 745 int skip0, skip1, oi0 = 0, oi1 = 0; 746 int ret, state0 = 0, state1 = 0; 747 748 if (op_offset < 12 || op_offset - 12 > bytestream2_get_bytes_left(gb)) 749 return AVERROR_INVALIDDATA; 750 751 dst = tex_data; 752 bytestream2_skip(gb, op_offset - 12); 753 if (op_size0 > max_op_size0) 754 return AVERROR_INVALIDDATA; 755 skip0 = dxv_decompress_opcodes(gb, op_data0, op_size0); 756 if (skip0 < 0) 757 return skip0; 758 if (op_size1 > max_op_size1) 759 return AVERROR_INVALIDDATA; 760 skip1 = dxv_decompress_opcodes(gb, op_data1, op_size1); 761 if (skip1 < 0) 762 return skip1; 763 bytestream2_seek(gb, data_start, SEEK_SET); 764 765 AV_WL32(dst, bytestream2_get_le32(gb)); 766 AV_WL32(dst + 4, bytestream2_get_le32(gb)); 767 AV_WL32(dst + 8, bytestream2_get_le32(gb)); 768 AV_WL32(dst + 12, bytestream2_get_le32(gb)); 769 770 tab0[0x9E3779B1 * AV_RL16(dst) >> 24] = dst; 771 tab1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFF) >> 24] = dst + 2; 772 tab2[0x9E3779B1 * AV_RL16(dst + 8) >> 24] = dst + 8; 773 tab3[0x9E3779B1 * (AV_RL32(dst + 10) & 0xFFFFFF) >> 24] = dst + 10; 774 dst += 16; 775 while (dst + 10 < tex_data + tex_size) { 776 ret = dxv_decompress_cgo(ctx, gb, tex_data, tex_size, op_data0, &oi0, op_size0, 777 &dst, &state0, tab0, tab1, 8); 778 if (ret < 0) 779 return ret; 780 ret = dxv_decompress_cgo(ctx, gb, tex_data, tex_size, op_data1, &oi1, op_size1, 781 &dst, &state1, tab2, tab3, 8); 782 if (ret < 0) 783 return ret; 784 } 785 786 bytestream2_seek(gb, data_start - 12 + op_offset + skip0 + skip1, SEEK_SET); 787 788 return 0; 789} 790 791static int dxv_decompress_yo(DXVContext *ctx, GetByteContext *gb, 792 uint8_t *tex_data, int tex_size, 793 uint8_t *op_data, int max_op_size) 794{ 795 int op_offset = bytestream2_get_le32(gb); 796 unsigned op_size = bytestream2_get_le32(gb); 797 int data_start = bytestream2_tell(gb); 798 uint8_t *dst, *table0[256] = { 0 }, *table1[256] = { 0 }; 799 int ret, state = 0, skip, oi = 0, v, vv; 800 801 if (op_offset < 8 || op_offset - 8 > bytestream2_get_bytes_left(gb)) 802 return AVERROR_INVALIDDATA; 803 804 dst = tex_data; 805 bytestream2_skip(gb, op_offset - 8); 806 if (op_size > max_op_size) 807 return AVERROR_INVALIDDATA; 808 skip = dxv_decompress_opcodes(gb, op_data, op_size); 809 if (skip < 0) 810 return skip; 811 bytestream2_seek(gb, data_start, SEEK_SET); 812 813 v = bytestream2_get_le32(gb); 814 AV_WL32(dst, v); 815 vv = bytestream2_get_le32(gb); 816 table0[0x9E3779B1 * (uint16_t)v >> 24] = dst; 817 AV_WL32(dst + 4, vv); 818 table1[0x9E3779B1 * (AV_RL32(dst + 2) & 0xFFFFFF) >> 24] = dst + 2; 819 dst += 8; 820 821 while (dst < tex_data + tex_size) { 822 ret = dxv_decompress_cgo(ctx, gb, tex_data, tex_size, op_data, &oi, op_size, 823 &dst, &state, table0, table1, 0); 824 if (ret < 0) 825 return ret; 826 } 827 828 bytestream2_seek(gb, data_start + op_offset + skip - 8, SEEK_SET); 829 830 return 0; 831} 832 833static int dxv_decompress_ycg6(AVCodecContext *avctx) 834{ 835 DXVContext *ctx = avctx->priv_data; 836 GetByteContext *gb = &ctx->gbc; 837 int ret; 838 839 ret = dxv_decompress_yo(ctx, gb, ctx->tex_data, ctx->tex_size, 840 ctx->op_data[0], ctx->op_size[0]); 841 if (ret < 0) 842 return ret; 843 844 return dxv_decompress_cocg(ctx, gb, ctx->ctex_data, ctx->ctex_size, 845 ctx->op_data[1], ctx->op_data[2], 846 ctx->op_size[1], ctx->op_size[2]); 847} 848 849static int dxv_decompress_yg10(AVCodecContext *avctx) 850{ 851 DXVContext *ctx = avctx->priv_data; 852 GetByteContext *gb = &ctx->gbc; 853 int ret; 854 855 ret = dxv_decompress_cocg(ctx, gb, ctx->tex_data, ctx->tex_size, 856 ctx->op_data[0], ctx->op_data[3], 857 ctx->op_size[0], ctx->op_size[3]); 858 if (ret < 0) 859 return ret; 860 861 return dxv_decompress_cocg(ctx, gb, ctx->ctex_data, ctx->ctex_size, 862 ctx->op_data[1], ctx->op_data[2], 863 ctx->op_size[1], ctx->op_size[2]); 864} 865 866static int dxv_decompress_dxt5(AVCodecContext *avctx) 867{ 868 DXVContext *ctx = avctx->priv_data; 869 GetByteContext *gbc = &ctx->gbc; 870 uint32_t value, op, prev; 871 int idx, state = 0; 872 int pos = 4; 873 int run = 0; 874 int probe, check; 875 876 /* Copy the first four elements */ 877 AV_WL32(ctx->tex_data + 0, bytestream2_get_le32(gbc)); 878 AV_WL32(ctx->tex_data + 4, bytestream2_get_le32(gbc)); 879 AV_WL32(ctx->tex_data + 8, bytestream2_get_le32(gbc)); 880 AV_WL32(ctx->tex_data + 12, bytestream2_get_le32(gbc)); 881 882 /* Process input until the whole texture has been filled */ 883 while (pos + 2 <= ctx->tex_size / 4) { 884 if (run) { 885 run--; 886 887 prev = AV_RL32(ctx->tex_data + 4 * (pos - 4)); 888 AV_WL32(ctx->tex_data + 4 * pos, prev); 889 pos++; 890 prev = AV_RL32(ctx->tex_data + 4 * (pos - 4)); 891 AV_WL32(ctx->tex_data + 4 * pos, prev); 892 pos++; 893 } else { 894 if (bytestream2_get_bytes_left(gbc) < 1) 895 return AVERROR_INVALIDDATA; 896 if (state == 0) { 897 value = bytestream2_get_le32(gbc); 898 state = 16; 899 } 900 op = value & 0x3; 901 value >>= 2; 902 state--; 903 904 switch (op) { 905 case 0: 906 /* Long copy */ 907 check = bytestream2_get_byte(gbc) + 1; 908 if (check == 256) { 909 do { 910 probe = bytestream2_get_le16(gbc); 911 check += probe; 912 } while (probe == 0xFFFF); 913 } 914 while (check && pos + 4 <= ctx->tex_size / 4) { 915 prev = AV_RL32(ctx->tex_data + 4 * (pos - 4)); 916 AV_WL32(ctx->tex_data + 4 * pos, prev); 917 pos++; 918 919 prev = AV_RL32(ctx->tex_data + 4 * (pos - 4)); 920 AV_WL32(ctx->tex_data + 4 * pos, prev); 921 pos++; 922 923 prev = AV_RL32(ctx->tex_data + 4 * (pos - 4)); 924 AV_WL32(ctx->tex_data + 4 * pos, prev); 925 pos++; 926 927 prev = AV_RL32(ctx->tex_data + 4 * (pos - 4)); 928 AV_WL32(ctx->tex_data + 4 * pos, prev); 929 pos++; 930 931 check--; 932 } 933 934 /* Restart (or exit) the loop */ 935 continue; 936 break; 937 case 1: 938 /* Load new run value */ 939 run = bytestream2_get_byte(gbc); 940 if (run == 255) { 941 do { 942 probe = bytestream2_get_le16(gbc); 943 run += probe; 944 } while (probe == 0xFFFF); 945 } 946 947 /* Copy two dwords from previous data */ 948 prev = AV_RL32(ctx->tex_data + 4 * (pos - 4)); 949 AV_WL32(ctx->tex_data + 4 * pos, prev); 950 pos++; 951 952 prev = AV_RL32(ctx->tex_data + 4 * (pos - 4)); 953 AV_WL32(ctx->tex_data + 4 * pos, prev); 954 pos++; 955 break; 956 case 2: 957 /* Copy two dwords from a previous index */ 958 idx = 8 + bytestream2_get_le16(gbc); 959 if (idx > pos || (unsigned int)(pos - idx) + 2 > ctx->tex_size / 4) 960 return AVERROR_INVALIDDATA; 961 prev = AV_RL32(ctx->tex_data + 4 * (pos - idx)); 962 AV_WL32(ctx->tex_data + 4 * pos, prev); 963 pos++; 964 965 prev = AV_RL32(ctx->tex_data + 4 * (pos - idx)); 966 AV_WL32(ctx->tex_data + 4 * pos, prev); 967 pos++; 968 break; 969 case 3: 970 /* Copy two dwords from input */ 971 prev = bytestream2_get_le32(gbc); 972 AV_WL32(ctx->tex_data + 4 * pos, prev); 973 pos++; 974 975 prev = bytestream2_get_le32(gbc); 976 AV_WL32(ctx->tex_data + 4 * pos, prev); 977 pos++; 978 break; 979 } 980 } 981 982 CHECKPOINT(4); 983 if (pos + 2 > ctx->tex_size / 4) 984 return AVERROR_INVALIDDATA; 985 986 /* Copy two elements from a previous offset or from the input buffer */ 987 if (op) { 988 if (idx > pos || (unsigned int)(pos - idx) + 2 > ctx->tex_size / 4) 989 return AVERROR_INVALIDDATA; 990 prev = AV_RL32(ctx->tex_data + 4 * (pos - idx)); 991 AV_WL32(ctx->tex_data + 4 * pos, prev); 992 pos++; 993 994 prev = AV_RL32(ctx->tex_data + 4 * (pos - idx)); 995 AV_WL32(ctx->tex_data + 4 * pos, prev); 996 pos++; 997 } else { 998 CHECKPOINT(4); 999 1000 if (op && (idx > pos || (unsigned int)(pos - idx) + 2 > ctx->tex_size / 4)) 1001 return AVERROR_INVALIDDATA; 1002 if (op) 1003 prev = AV_RL32(ctx->tex_data + 4 * (pos - idx)); 1004 else 1005 prev = bytestream2_get_le32(gbc); 1006 AV_WL32(ctx->tex_data + 4 * pos, prev); 1007 pos++; 1008 1009 CHECKPOINT(4); 1010 1011 if (op) 1012 prev = AV_RL32(ctx->tex_data + 4 * (pos - idx)); 1013 else 1014 prev = bytestream2_get_le32(gbc); 1015 AV_WL32(ctx->tex_data + 4 * pos, prev); 1016 pos++; 1017 } 1018 } 1019 1020 return 0; 1021} 1022 1023static int dxv_decompress_lzf(AVCodecContext *avctx) 1024{ 1025 DXVContext *ctx = avctx->priv_data; 1026 return ff_lzf_uncompress(&ctx->gbc, &ctx->tex_data, &ctx->tex_size); 1027} 1028 1029static int dxv_decompress_raw(AVCodecContext *avctx) 1030{ 1031 DXVContext *ctx = avctx->priv_data; 1032 GetByteContext *gbc = &ctx->gbc; 1033 1034 if (bytestream2_get_bytes_left(gbc) < ctx->tex_size) 1035 return AVERROR_INVALIDDATA; 1036 1037 bytestream2_get_buffer(gbc, ctx->tex_data, ctx->tex_size); 1038 return 0; 1039} 1040 1041static int dxv_decode(AVCodecContext *avctx, AVFrame *frame, 1042 int *got_frame, AVPacket *avpkt) 1043{ 1044 DXVContext *ctx = avctx->priv_data; 1045 GetByteContext *gbc = &ctx->gbc; 1046 int (*decompress_tex)(AVCodecContext *avctx); 1047 const char *msgcomp, *msgtext; 1048 uint32_t tag; 1049 int version_major, version_minor = 0; 1050 int size = 0, old_type = 0; 1051 int ret; 1052 1053 bytestream2_init(gbc, avpkt->data, avpkt->size); 1054 1055 ctx->texture_block_h = 4; 1056 ctx->texture_block_w = 4; 1057 1058 avctx->pix_fmt = AV_PIX_FMT_RGBA; 1059 avctx->colorspace = AVCOL_SPC_RGB; 1060 1061 ctx->tex_funct = NULL; 1062 ctx->tex_funct_planar[0] = NULL; 1063 ctx->tex_funct_planar[1] = NULL; 1064 1065 tag = bytestream2_get_le32(gbc); 1066 switch (tag) { 1067 case MKBETAG('D', 'X', 'T', '1'): 1068 decompress_tex = dxv_decompress_dxt1; 1069 ctx->tex_funct = ctx->texdsp.dxt1_block; 1070 ctx->tex_rat = 8; 1071 ctx->tex_step = 8; 1072 msgcomp = "DXTR1"; 1073 msgtext = "DXT1"; 1074 break; 1075 case MKBETAG('D', 'X', 'T', '5'): 1076 decompress_tex = dxv_decompress_dxt5; 1077 ctx->tex_funct = ctx->texdsp.dxt5_block; 1078 ctx->tex_rat = 4; 1079 ctx->tex_step = 16; 1080 msgcomp = "DXTR5"; 1081 msgtext = "DXT5"; 1082 break; 1083 case MKBETAG('Y', 'C', 'G', '6'): 1084 decompress_tex = dxv_decompress_ycg6; 1085 ctx->tex_funct_planar[0] = yo_block; 1086 ctx->tex_funct_planar[1] = cocg_block; 1087 ctx->tex_rat = 8; 1088 ctx->tex_step = 32; 1089 ctx->ctex_step = 16; 1090 msgcomp = "YOCOCG6"; 1091 msgtext = "YCG6"; 1092 ctx->ctex_size = avctx->coded_width * avctx->coded_height / 4; 1093 ctx->texture_block_h = 4; 1094 ctx->texture_block_w = 16; 1095 ctx->ctexture_block_h = 4; 1096 ctx->ctexture_block_w = 4; 1097 avctx->pix_fmt = AV_PIX_FMT_YUV420P; 1098 avctx->colorspace = AVCOL_SPC_YCOCG; 1099 break; 1100 case MKBETAG('Y', 'G', '1', '0'): 1101 decompress_tex = dxv_decompress_yg10; 1102 ctx->tex_funct_planar[0] = yao_block; 1103 ctx->tex_funct_planar[1] = cocg_block; 1104 ctx->tex_rat = 4; 1105 ctx->tex_step = 64; 1106 ctx->ctex_step = 16; 1107 msgcomp = "YAOCOCG10"; 1108 msgtext = "YG10"; 1109 ctx->ctex_size = avctx->coded_width * avctx->coded_height / 4; 1110 ctx->texture_block_h = 4; 1111 ctx->texture_block_w = 16; 1112 ctx->ctexture_block_h = 4; 1113 ctx->ctexture_block_w = 4; 1114 avctx->pix_fmt = AV_PIX_FMT_YUVA420P; 1115 avctx->colorspace = AVCOL_SPC_YCOCG; 1116 break; 1117 default: 1118 /* Old version does not have a real header, just size and type. */ 1119 size = tag & 0x00FFFFFF; 1120 old_type = tag >> 24; 1121 version_major = (old_type & 0x0F) - 1; 1122 1123 if (old_type & 0x80) { 1124 msgcomp = "RAW"; 1125 decompress_tex = dxv_decompress_raw; 1126 } else { 1127 msgcomp = "LZF"; 1128 decompress_tex = dxv_decompress_lzf; 1129 } 1130 1131 if (old_type & 0x40) { 1132 msgtext = "DXT5"; 1133 1134 ctx->tex_funct = ctx->texdsp.dxt5_block; 1135 ctx->tex_step = 16; 1136 } else if (old_type & 0x20 || version_major == 1) { 1137 msgtext = "DXT1"; 1138 1139 ctx->tex_funct = ctx->texdsp.dxt1_block; 1140 ctx->tex_step = 8; 1141 } else { 1142 av_log(avctx, AV_LOG_ERROR, "Unsupported header (0x%08"PRIX32")\n.", tag); 1143 return AVERROR_INVALIDDATA; 1144 } 1145 ctx->tex_rat = 1; 1146 break; 1147 } 1148 1149 ctx->slice_count = av_clip(avctx->thread_count, 1, 1150 avctx->coded_height / FFMAX(ctx->texture_block_h, 1151 ctx->ctexture_block_h)); 1152 1153 /* New header is 12 bytes long. */ 1154 if (!old_type) { 1155 version_major = bytestream2_get_byte(gbc) - 1; 1156 version_minor = bytestream2_get_byte(gbc); 1157 1158 /* Encoder copies texture data when compression is not advantageous. */ 1159 if (bytestream2_get_byte(gbc)) { 1160 msgcomp = "RAW"; 1161 ctx->tex_rat = 1; 1162 decompress_tex = dxv_decompress_raw; 1163 } 1164 1165 bytestream2_skip(gbc, 1); // unknown 1166 size = bytestream2_get_le32(gbc); 1167 } 1168 av_log(avctx, AV_LOG_DEBUG, 1169 "%s compression with %s texture (version %d.%d)\n", 1170 msgcomp, msgtext, version_major, version_minor); 1171 1172 if (size != bytestream2_get_bytes_left(gbc)) { 1173 av_log(avctx, AV_LOG_ERROR, 1174 "Incomplete or invalid file (header %d, left %u).\n", 1175 size, bytestream2_get_bytes_left(gbc)); 1176 return AVERROR_INVALIDDATA; 1177 } 1178 1179 ctx->tex_size = avctx->coded_width * avctx->coded_height * 4 / ctx->tex_rat; 1180 ret = av_reallocp(&ctx->tex_data, ctx->tex_size + AV_INPUT_BUFFER_PADDING_SIZE); 1181 if (ret < 0) 1182 return ret; 1183 1184 if (ctx->ctex_size) { 1185 int i; 1186 1187 ctx->op_size[0] = avctx->coded_width * avctx->coded_height / 16; 1188 ctx->op_size[1] = avctx->coded_width * avctx->coded_height / 32; 1189 ctx->op_size[2] = avctx->coded_width * avctx->coded_height / 32; 1190 ctx->op_size[3] = avctx->coded_width * avctx->coded_height / 16; 1191 1192 ret = av_reallocp(&ctx->ctex_data, ctx->ctex_size + AV_INPUT_BUFFER_PADDING_SIZE); 1193 if (ret < 0) 1194 return ret; 1195 for (i = 0; i < 4; i++) { 1196 ret = av_reallocp(&ctx->op_data[i], ctx->op_size[i]); 1197 if (ret < 0) 1198 return ret; 1199 } 1200 } 1201 1202 /* Decompress texture out of the intermediate compression. */ 1203 ret = decompress_tex(avctx); 1204 if (ret < 0) 1205 return ret; 1206 { 1207 int w_block = avctx->coded_width / ctx->texture_block_w; 1208 int h_block = avctx->coded_height / ctx->texture_block_h; 1209 if (w_block * h_block * ctx->tex_step > ctx->tex_size * 8LL) 1210 return AVERROR_INVALIDDATA; 1211 } 1212 1213 ret = ff_thread_get_buffer(avctx, frame, 0); 1214 if (ret < 0) 1215 return ret; 1216 1217 /* Now decompress the texture with the standard functions. */ 1218 avctx->execute2(avctx, decompress_texture_thread, 1219 frame, NULL, ctx->slice_count); 1220 1221 /* Frame is ready to be output. */ 1222 frame->pict_type = AV_PICTURE_TYPE_I; 1223 frame->key_frame = 1; 1224 *got_frame = 1; 1225 1226 return avpkt->size; 1227} 1228 1229static int dxv_init(AVCodecContext *avctx) 1230{ 1231 DXVContext *ctx = avctx->priv_data; 1232 int ret = av_image_check_size(avctx->width, avctx->height, 0, avctx); 1233 1234 if (ret < 0) { 1235 av_log(avctx, AV_LOG_ERROR, "Invalid image size %dx%d.\n", 1236 avctx->width, avctx->height); 1237 return ret; 1238 } 1239 1240 /* Codec requires 16x16 alignment. */ 1241 avctx->coded_width = FFALIGN(avctx->width, 16); 1242 avctx->coded_height = FFALIGN(avctx->height, 16); 1243 1244 ff_texturedsp_init(&ctx->texdsp); 1245 1246 return 0; 1247} 1248 1249static int dxv_close(AVCodecContext *avctx) 1250{ 1251 DXVContext *ctx = avctx->priv_data; 1252 1253 av_freep(&ctx->tex_data); 1254 av_freep(&ctx->ctex_data); 1255 av_freep(&ctx->op_data[0]); 1256 av_freep(&ctx->op_data[1]); 1257 av_freep(&ctx->op_data[2]); 1258 av_freep(&ctx->op_data[3]); 1259 1260 return 0; 1261} 1262 1263const FFCodec ff_dxv_decoder = { 1264 .p.name = "dxv", 1265 .p.long_name = NULL_IF_CONFIG_SMALL("Resolume DXV"), 1266 .p.type = AVMEDIA_TYPE_VIDEO, 1267 .p.id = AV_CODEC_ID_DXV, 1268 .init = dxv_init, 1269 FF_CODEC_DECODE_CB(dxv_decode), 1270 .close = dxv_close, 1271 .priv_data_size = sizeof(DXVContext), 1272 .p.capabilities = AV_CODEC_CAP_DR1 | 1273 AV_CODEC_CAP_SLICE_THREADS | 1274 AV_CODEC_CAP_FRAME_THREADS, 1275 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | 1276 FF_CODEC_CAP_INIT_CLEANUP, 1277}; 1278