1/* 2 * VC3/DNxHD decoder. 3 * Copyright (c) 2007 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com> 4 * Copyright (c) 2011 MirriAd Ltd 5 * Copyright (c) 2015 Christophe Gisquet 6 * 7 * 10 bit support added by MirriAd Ltd, Joseph Artsimovich <joseph@mirriad.com> 8 * Slice multithreading and MB interlaced support added by Christophe Gisquet 9 * 10 * This file is part of FFmpeg. 11 * 12 * FFmpeg is free software; you can redistribute it and/or 13 * modify it under the terms of the GNU Lesser General Public 14 * License as published by the Free Software Foundation; either 15 * version 2.1 of the License, or (at your option) any later version. 16 * 17 * FFmpeg is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 20 * Lesser General Public License for more details. 21 * 22 * You should have received a copy of the GNU Lesser General Public 23 * License along with FFmpeg; if not, write to the Free Software 24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 25 */ 26 27#include "libavutil/imgutils.h" 28#include "libavutil/mem_internal.h" 29 30#include "avcodec.h" 31#include "blockdsp.h" 32#include "codec_internal.h" 33#define UNCHECKED_BITSTREAM_READER 1 34#include "get_bits.h" 35#include "dnxhddata.h" 36#include "idctdsp.h" 37#include "internal.h" 38#include "profiles.h" 39#include "thread.h" 40 41typedef struct RowContext { 42 DECLARE_ALIGNED(32, int16_t, blocks)[12][64]; 43 int luma_scale[64]; 44 int chroma_scale[64]; 45 GetBitContext gb; 46 int last_dc[3]; 47 int last_qscale; 48 int errors; 49 /** -1:not set yet 0:off=RGB 1:on=YUV 2:variable */ 50 int format; 51} RowContext; 52 53typedef struct DNXHDContext { 54 AVCodecContext *avctx; 55 RowContext *rows; 56 BlockDSPContext bdsp; 57 const uint8_t* buf; 58 int buf_size; 59 int64_t cid; ///< compression id 60 unsigned int width, height; 61 enum AVPixelFormat pix_fmt; 62 unsigned int mb_width, mb_height; 63 uint32_t mb_scan_index[512]; 64 int data_offset; // End of mb_scan_index, where macroblocks start 65 int cur_field; ///< current interlaced field 66 VLC ac_vlc, dc_vlc, run_vlc; 67 IDCTDSPContext idsp; 68 ScanTable scantable; 69 const CIDEntry *cid_table; 70 int bit_depth; // 8, 10, 12 or 0 if not initialized at all. 71 int is_444; 72 int alpha; 73 int lla; 74 int mbaff; 75 int act; 76 int (*decode_dct_block)(const struct DNXHDContext *ctx, 77 RowContext *row, int n); 78} DNXHDContext; 79 80#define DNXHD_VLC_BITS 9 81#define DNXHD_DC_VLC_BITS 7 82 83static int dnxhd_decode_dct_block_8(const DNXHDContext *ctx, 84 RowContext *row, int n); 85static int dnxhd_decode_dct_block_10(const DNXHDContext *ctx, 86 RowContext *row, int n); 87static int dnxhd_decode_dct_block_10_444(const DNXHDContext *ctx, 88 RowContext *row, int n); 89static int dnxhd_decode_dct_block_12(const DNXHDContext *ctx, 90 RowContext *row, int n); 91static int dnxhd_decode_dct_block_12_444(const DNXHDContext *ctx, 92 RowContext *row, int n); 93 94static av_cold int dnxhd_decode_init(AVCodecContext *avctx) 95{ 96 DNXHDContext *ctx = avctx->priv_data; 97 98 ctx->avctx = avctx; 99 ctx->cid = -1; 100 if (avctx->colorspace == AVCOL_SPC_UNSPECIFIED) { 101 avctx->colorspace = AVCOL_SPC_BT709; 102 } 103 104 avctx->coded_width = FFALIGN(avctx->width, 16); 105 avctx->coded_height = FFALIGN(avctx->height, 16); 106 107 ctx->rows = av_calloc(avctx->thread_count, sizeof(*ctx->rows)); 108 if (!ctx->rows) 109 return AVERROR(ENOMEM); 110 111 return 0; 112} 113 114static int dnxhd_init_vlc(DNXHDContext *ctx, uint32_t cid, int bitdepth) 115{ 116 int ret; 117 if (cid != ctx->cid) { 118 const CIDEntry *cid_table = ff_dnxhd_get_cid_table(cid); 119 120 if (!cid_table) { 121 av_log(ctx->avctx, AV_LOG_ERROR, "unsupported cid %"PRIu32"\n", cid); 122 return AVERROR(ENOSYS); 123 } 124 if (cid_table->bit_depth != bitdepth && 125 cid_table->bit_depth != DNXHD_VARIABLE) { 126 av_log(ctx->avctx, AV_LOG_ERROR, "bit depth mismatches %d %d\n", 127 cid_table->bit_depth, bitdepth); 128 return AVERROR_INVALIDDATA; 129 } 130 ctx->cid_table = cid_table; 131 av_log(ctx->avctx, AV_LOG_VERBOSE, "Profile cid %"PRIu32".\n", cid); 132 133 ff_free_vlc(&ctx->ac_vlc); 134 ff_free_vlc(&ctx->dc_vlc); 135 ff_free_vlc(&ctx->run_vlc); 136 137 if ((ret = init_vlc(&ctx->ac_vlc, DNXHD_VLC_BITS, 257, 138 ctx->cid_table->ac_bits, 1, 1, 139 ctx->cid_table->ac_codes, 2, 2, 0)) < 0) 140 goto out; 141 if ((ret = init_vlc(&ctx->dc_vlc, DNXHD_DC_VLC_BITS, bitdepth > 8 ? 14 : 12, 142 ctx->cid_table->dc_bits, 1, 1, 143 ctx->cid_table->dc_codes, 1, 1, 0)) < 0) 144 goto out; 145 if ((ret = init_vlc(&ctx->run_vlc, DNXHD_VLC_BITS, 62, 146 ctx->cid_table->run_bits, 1, 1, 147 ctx->cid_table->run_codes, 2, 2, 0)) < 0) 148 goto out; 149 150 ctx->cid = cid; 151 } 152 ret = 0; 153out: 154 if (ret < 0) 155 av_log(ctx->avctx, AV_LOG_ERROR, "init_vlc failed\n"); 156 return ret; 157} 158 159static int dnxhd_get_profile(int cid) 160{ 161 switch(cid) { 162 case 1270: 163 return FF_PROFILE_DNXHR_444; 164 case 1271: 165 return FF_PROFILE_DNXHR_HQX; 166 case 1272: 167 return FF_PROFILE_DNXHR_HQ; 168 case 1273: 169 return FF_PROFILE_DNXHR_SQ; 170 case 1274: 171 return FF_PROFILE_DNXHR_LB; 172 } 173 return FF_PROFILE_DNXHD; 174} 175 176static int dnxhd_decode_header(DNXHDContext *ctx, AVFrame *frame, 177 const uint8_t *buf, int buf_size, 178 int first_field) 179{ 180 int i, cid, ret; 181 int old_bit_depth = ctx->bit_depth, bitdepth; 182 uint64_t header_prefix; 183 if (buf_size < 0x280) { 184 av_log(ctx->avctx, AV_LOG_ERROR, 185 "buffer too small (%d < 640).\n", buf_size); 186 return AVERROR_INVALIDDATA; 187 } 188 189 header_prefix = ff_dnxhd_parse_header_prefix(buf); 190 if (header_prefix == 0) { 191 av_log(ctx->avctx, AV_LOG_ERROR, 192 "unknown header 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X\n", 193 buf[0], buf[1], buf[2], buf[3], buf[4]); 194 return AVERROR_INVALIDDATA; 195 } 196 if (buf[5] & 2) { /* interlaced */ 197 ctx->cur_field = first_field ? buf[5] & 1 : !ctx->cur_field; 198 frame->interlaced_frame = 1; 199 frame->top_field_first = first_field ^ ctx->cur_field; 200 av_log(ctx->avctx, AV_LOG_DEBUG, 201 "interlaced %d, cur field %d\n", buf[5] & 3, ctx->cur_field); 202 } else { 203 ctx->cur_field = 0; 204 } 205 ctx->mbaff = (buf[0x6] >> 5) & 1; 206 ctx->alpha = buf[0x7] & 1; 207 ctx->lla = (buf[0x7] >> 1) & 1; 208 if (ctx->alpha) 209 avpriv_request_sample(ctx->avctx, "alpha"); 210 211 ctx->height = AV_RB16(buf + 0x18); 212 ctx->width = AV_RB16(buf + 0x1a); 213 214 switch(buf[0x21] >> 5) { 215 case 1: bitdepth = 8; break; 216 case 2: bitdepth = 10; break; 217 case 3: bitdepth = 12; break; 218 default: 219 av_log(ctx->avctx, AV_LOG_ERROR, 220 "Unknown bitdepth indicator (%d)\n", buf[0x21] >> 5); 221 return AVERROR_INVALIDDATA; 222 } 223 224 cid = AV_RB32(buf + 0x28); 225 226 ctx->avctx->profile = dnxhd_get_profile(cid); 227 228 if ((ret = dnxhd_init_vlc(ctx, cid, bitdepth)) < 0) 229 return ret; 230 if (ctx->mbaff && ctx->cid_table->cid != 1260) 231 av_log(ctx->avctx, AV_LOG_WARNING, 232 "Adaptive MB interlace flag in an unsupported profile.\n"); 233 234 switch ((buf[0x2C] >> 1) & 3) { 235 case 0: frame->colorspace = AVCOL_SPC_BT709; break; 236 case 1: frame->colorspace = AVCOL_SPC_BT2020_NCL; break; 237 case 2: frame->colorspace = AVCOL_SPC_BT2020_CL; break; 238 case 3: frame->colorspace = AVCOL_SPC_UNSPECIFIED; break; 239 } 240 241 ctx->act = buf[0x2C] & 1; 242 if (ctx->act && ctx->cid_table->cid != 1256 && ctx->cid_table->cid != 1270) 243 av_log(ctx->avctx, AV_LOG_WARNING, 244 "Adaptive color transform in an unsupported profile.\n"); 245 246 ctx->is_444 = (buf[0x2C] >> 6) & 1; 247 if (ctx->is_444) { 248 if (bitdepth == 8) { 249 avpriv_request_sample(ctx->avctx, "4:4:4 8 bits"); 250 return AVERROR_INVALIDDATA; 251 } else if (bitdepth == 10) { 252 ctx->decode_dct_block = dnxhd_decode_dct_block_10_444; 253 ctx->pix_fmt = ctx->act ? AV_PIX_FMT_YUV444P10 254 : AV_PIX_FMT_GBRP10; 255 } else { 256 ctx->decode_dct_block = dnxhd_decode_dct_block_12_444; 257 ctx->pix_fmt = ctx->act ? AV_PIX_FMT_YUV444P12 258 : AV_PIX_FMT_GBRP12; 259 } 260 } else if (bitdepth == 12) { 261 ctx->decode_dct_block = dnxhd_decode_dct_block_12; 262 ctx->pix_fmt = AV_PIX_FMT_YUV422P12; 263 } else if (bitdepth == 10) { 264 if (ctx->avctx->profile == FF_PROFILE_DNXHR_HQX) 265 ctx->decode_dct_block = dnxhd_decode_dct_block_10_444; 266 else 267 ctx->decode_dct_block = dnxhd_decode_dct_block_10; 268 ctx->pix_fmt = AV_PIX_FMT_YUV422P10; 269 } else { 270 ctx->decode_dct_block = dnxhd_decode_dct_block_8; 271 ctx->pix_fmt = AV_PIX_FMT_YUV422P; 272 } 273 274 ctx->avctx->bits_per_raw_sample = ctx->bit_depth = bitdepth; 275 if (ctx->bit_depth != old_bit_depth) { 276 ff_blockdsp_init(&ctx->bdsp, ctx->avctx); 277 ff_idctdsp_init(&ctx->idsp, ctx->avctx); 278 ff_init_scantable(ctx->idsp.idct_permutation, &ctx->scantable, 279 ff_zigzag_direct); 280 } 281 282 // make sure profile size constraints are respected 283 // DNx100 allows 1920->1440 and 1280->960 subsampling 284 if (ctx->width != ctx->cid_table->width && 285 ctx->cid_table->width != DNXHD_VARIABLE) { 286 av_reduce(&ctx->avctx->sample_aspect_ratio.num, 287 &ctx->avctx->sample_aspect_ratio.den, 288 ctx->width, ctx->cid_table->width, 255); 289 ctx->width = ctx->cid_table->width; 290 } 291 292 if (buf_size < ctx->cid_table->coding_unit_size) { 293 av_log(ctx->avctx, AV_LOG_ERROR, "incorrect frame size (%d < %u).\n", 294 buf_size, ctx->cid_table->coding_unit_size); 295 return AVERROR_INVALIDDATA; 296 } 297 298 ctx->mb_width = (ctx->width + 15)>> 4; 299 ctx->mb_height = AV_RB16(buf + 0x16c); 300 301 if ((ctx->height + 15) >> 4 == ctx->mb_height && frame->interlaced_frame) 302 ctx->height <<= 1; 303 304 av_log(ctx->avctx, AV_LOG_VERBOSE, "%dx%d, 4:%s %d bits, MBAFF=%d ACT=%d\n", 305 ctx->width, ctx->height, ctx->is_444 ? "4:4" : "2:2", 306 ctx->bit_depth, ctx->mbaff, ctx->act); 307 308 // Newer format supports variable mb_scan_index sizes 309 if (ctx->mb_height > 68 && ff_dnxhd_check_header_prefix_hr(header_prefix)) { 310 ctx->data_offset = 0x170 + (ctx->mb_height << 2); 311 } else { 312 if (ctx->mb_height > 68) { 313 av_log(ctx->avctx, AV_LOG_ERROR, 314 "mb height too big: %d\n", ctx->mb_height); 315 return AVERROR_INVALIDDATA; 316 } 317 ctx->data_offset = 0x280; 318 } 319 if ((ctx->mb_height << frame->interlaced_frame) > (ctx->height + 15) >> 4) { 320 av_log(ctx->avctx, AV_LOG_ERROR, 321 "mb height too big: %d\n", ctx->mb_height); 322 return AVERROR_INVALIDDATA; 323 } 324 325 if (buf_size < ctx->data_offset) { 326 av_log(ctx->avctx, AV_LOG_ERROR, 327 "buffer too small (%d < %d).\n", buf_size, ctx->data_offset); 328 return AVERROR_INVALIDDATA; 329 } 330 331 if (ctx->mb_height > FF_ARRAY_ELEMS(ctx->mb_scan_index)) { 332 av_log(ctx->avctx, AV_LOG_ERROR, 333 "mb_height too big (%d > %"SIZE_SPECIFIER").\n", ctx->mb_height, FF_ARRAY_ELEMS(ctx->mb_scan_index)); 334 return AVERROR_INVALIDDATA; 335 } 336 337 for (i = 0; i < ctx->mb_height; i++) { 338 ctx->mb_scan_index[i] = AV_RB32(buf + 0x170 + (i << 2)); 339 ff_dlog(ctx->avctx, "mb scan index %d, pos %d: %"PRIu32"\n", 340 i, 0x170 + (i << 2), ctx->mb_scan_index[i]); 341 if (buf_size - ctx->data_offset < ctx->mb_scan_index[i]) { 342 av_log(ctx->avctx, AV_LOG_ERROR, 343 "invalid mb scan index (%"PRIu32" vs %u).\n", 344 ctx->mb_scan_index[i], buf_size - ctx->data_offset); 345 return AVERROR_INVALIDDATA; 346 } 347 } 348 349 return 0; 350} 351 352static av_always_inline int dnxhd_decode_dct_block(const DNXHDContext *ctx, 353 RowContext *row, 354 int n, 355 int index_bits, 356 int level_bias, 357 int level_shift, 358 int dc_shift) 359{ 360 int i, j, index1, index2, len, flags; 361 int level, component, sign; 362 const int *scale; 363 const uint8_t *weight_matrix; 364 const uint8_t *ac_info = ctx->cid_table->ac_info; 365 int16_t *block = row->blocks[n]; 366 const int eob_index = ctx->cid_table->eob_index; 367 int ret = 0; 368 OPEN_READER(bs, &row->gb); 369 370 ctx->bdsp.clear_block(block); 371 372 if (!ctx->is_444) { 373 if (n & 2) { 374 component = 1 + (n & 1); 375 scale = row->chroma_scale; 376 weight_matrix = ctx->cid_table->chroma_weight; 377 } else { 378 component = 0; 379 scale = row->luma_scale; 380 weight_matrix = ctx->cid_table->luma_weight; 381 } 382 } else { 383 component = (n >> 1) % 3; 384 if (component) { 385 scale = row->chroma_scale; 386 weight_matrix = ctx->cid_table->chroma_weight; 387 } else { 388 scale = row->luma_scale; 389 weight_matrix = ctx->cid_table->luma_weight; 390 } 391 } 392 393 UPDATE_CACHE(bs, &row->gb); 394 GET_VLC(len, bs, &row->gb, ctx->dc_vlc.table, DNXHD_DC_VLC_BITS, 1); 395 if (len < 0) { 396 ret = len; 397 goto error; 398 } 399 if (len) { 400 level = GET_CACHE(bs, &row->gb); 401 LAST_SKIP_BITS(bs, &row->gb, len); 402 sign = ~level >> 31; 403 level = (NEG_USR32(sign ^ level, len) ^ sign) - sign; 404 row->last_dc[component] += level * (1 << dc_shift); 405 } 406 block[0] = row->last_dc[component]; 407 408 i = 0; 409 410 UPDATE_CACHE(bs, &row->gb); 411 GET_VLC(index1, bs, &row->gb, ctx->ac_vlc.table, 412 DNXHD_VLC_BITS, 2); 413 414 while (index1 != eob_index) { 415 level = ac_info[2*index1+0]; 416 flags = ac_info[2*index1+1]; 417 418 sign = SHOW_SBITS(bs, &row->gb, 1); 419 SKIP_BITS(bs, &row->gb, 1); 420 421 if (flags & 1) { 422 level += SHOW_UBITS(bs, &row->gb, index_bits) << 7; 423 SKIP_BITS(bs, &row->gb, index_bits); 424 } 425 426 if (flags & 2) { 427 UPDATE_CACHE(bs, &row->gb); 428 GET_VLC(index2, bs, &row->gb, ctx->run_vlc.table, 429 DNXHD_VLC_BITS, 2); 430 i += ctx->cid_table->run[index2]; 431 } 432 433 if (++i > 63) { 434 av_log(ctx->avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", n, i); 435 ret = -1; 436 break; 437 } 438 439 j = ctx->scantable.permutated[i]; 440 level *= scale[i]; 441 level += scale[i] >> 1; 442 if (level_bias < 32 || weight_matrix[i] != level_bias) 443 level += level_bias; // 1<<(level_shift-1) 444 level >>= level_shift; 445 446 block[j] = (level ^ sign) - sign; 447 448 UPDATE_CACHE(bs, &row->gb); 449 GET_VLC(index1, bs, &row->gb, ctx->ac_vlc.table, 450 DNXHD_VLC_BITS, 2); 451 } 452error: 453 CLOSE_READER(bs, &row->gb); 454 return ret; 455} 456 457static int dnxhd_decode_dct_block_8(const DNXHDContext *ctx, 458 RowContext *row, int n) 459{ 460 return dnxhd_decode_dct_block(ctx, row, n, 4, 32, 6, 0); 461} 462 463static int dnxhd_decode_dct_block_10(const DNXHDContext *ctx, 464 RowContext *row, int n) 465{ 466 return dnxhd_decode_dct_block(ctx, row, n, 6, 8, 4, 0); 467} 468 469static int dnxhd_decode_dct_block_10_444(const DNXHDContext *ctx, 470 RowContext *row, int n) 471{ 472 return dnxhd_decode_dct_block(ctx, row, n, 6, 32, 6, 0); 473} 474 475static int dnxhd_decode_dct_block_12(const DNXHDContext *ctx, 476 RowContext *row, int n) 477{ 478 return dnxhd_decode_dct_block(ctx, row, n, 6, 8, 4, 2); 479} 480 481static int dnxhd_decode_dct_block_12_444(const DNXHDContext *ctx, 482 RowContext *row, int n) 483{ 484 return dnxhd_decode_dct_block(ctx, row, n, 6, 32, 4, 2); 485} 486 487static int dnxhd_decode_macroblock(const DNXHDContext *ctx, RowContext *row, 488 AVFrame *frame, int x, int y) 489{ 490 int shift1 = ctx->bit_depth >= 10; 491 int dct_linesize_luma = frame->linesize[0]; 492 int dct_linesize_chroma = frame->linesize[1]; 493 uint8_t *dest_y, *dest_u, *dest_v; 494 int dct_y_offset, dct_x_offset; 495 int qscale, i, act; 496 int interlaced_mb = 0; 497 498 if (ctx->mbaff) { 499 interlaced_mb = get_bits1(&row->gb); 500 qscale = get_bits(&row->gb, 10); 501 } else { 502 qscale = get_bits(&row->gb, 11); 503 } 504 act = get_bits1(&row->gb); 505 if (act) { 506 if (!ctx->act) { 507 static int act_warned; 508 if (!act_warned) { 509 act_warned = 1; 510 av_log(ctx->avctx, AV_LOG_ERROR, 511 "ACT flag set, in violation of frame header.\n"); 512 } 513 } else if (row->format == -1) { 514 row->format = act; 515 } else if (row->format != act) { 516 row->format = 2; // Variable 517 } 518 } 519 520 if (qscale != row->last_qscale) { 521 for (i = 0; i < 64; i++) { 522 row->luma_scale[i] = qscale * ctx->cid_table->luma_weight[i]; 523 row->chroma_scale[i] = qscale * ctx->cid_table->chroma_weight[i]; 524 } 525 row->last_qscale = qscale; 526 } 527 528 for (i = 0; i < 8 + 4 * ctx->is_444; i++) { 529 if (ctx->decode_dct_block(ctx, row, i) < 0) 530 return AVERROR_INVALIDDATA; 531 } 532 533 if (frame->interlaced_frame) { 534 dct_linesize_luma <<= 1; 535 dct_linesize_chroma <<= 1; 536 } 537 538 dest_y = frame->data[0] + ((y * dct_linesize_luma) << 4) + (x << (4 + shift1)); 539 dest_u = frame->data[1] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444)); 540 dest_v = frame->data[2] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444)); 541 542 if (frame->interlaced_frame && ctx->cur_field) { 543 dest_y += frame->linesize[0]; 544 dest_u += frame->linesize[1]; 545 dest_v += frame->linesize[2]; 546 } 547 if (interlaced_mb) { 548 dct_linesize_luma <<= 1; 549 dct_linesize_chroma <<= 1; 550 } 551 552 dct_y_offset = interlaced_mb ? frame->linesize[0] : (dct_linesize_luma << 3); 553 dct_x_offset = 8 << shift1; 554 if (!ctx->is_444) { 555 ctx->idsp.idct_put(dest_y, dct_linesize_luma, row->blocks[0]); 556 ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, row->blocks[1]); 557 ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, row->blocks[4]); 558 ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, row->blocks[5]); 559 560 if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) { 561 dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3); 562 ctx->idsp.idct_put(dest_u, dct_linesize_chroma, row->blocks[2]); 563 ctx->idsp.idct_put(dest_v, dct_linesize_chroma, row->blocks[3]); 564 ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, row->blocks[6]); 565 ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, row->blocks[7]); 566 } 567 } else { 568 ctx->idsp.idct_put(dest_y, dct_linesize_luma, row->blocks[0]); 569 ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, row->blocks[1]); 570 ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, row->blocks[6]); 571 ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, row->blocks[7]); 572 573 if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) { 574 dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3); 575 ctx->idsp.idct_put(dest_u, dct_linesize_chroma, row->blocks[2]); 576 ctx->idsp.idct_put(dest_u + dct_x_offset, dct_linesize_chroma, row->blocks[3]); 577 ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, row->blocks[8]); 578 ctx->idsp.idct_put(dest_u + dct_y_offset + dct_x_offset, dct_linesize_chroma, row->blocks[9]); 579 ctx->idsp.idct_put(dest_v, dct_linesize_chroma, row->blocks[4]); 580 ctx->idsp.idct_put(dest_v + dct_x_offset, dct_linesize_chroma, row->blocks[5]); 581 ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, row->blocks[10]); 582 ctx->idsp.idct_put(dest_v + dct_y_offset + dct_x_offset, dct_linesize_chroma, row->blocks[11]); 583 } 584 } 585 586 return 0; 587} 588 589static int dnxhd_decode_row(AVCodecContext *avctx, void *data, 590 int rownb, int threadnb) 591{ 592 const DNXHDContext *ctx = avctx->priv_data; 593 uint32_t offset = ctx->mb_scan_index[rownb]; 594 RowContext *row = ctx->rows + threadnb; 595 int x, ret; 596 597 row->last_dc[0] = 598 row->last_dc[1] = 599 row->last_dc[2] = 1 << (ctx->bit_depth + 2); // for levels +2^(bitdepth-1) 600 ret = init_get_bits8(&row->gb, ctx->buf + offset, ctx->buf_size - offset); 601 if (ret < 0) { 602 row->errors++; 603 return ret; 604 } 605 for (x = 0; x < ctx->mb_width; x++) { 606 int ret = dnxhd_decode_macroblock(ctx, row, data, x, rownb); 607 if (ret < 0) { 608 row->errors++; 609 return ret; 610 } 611 } 612 613 return 0; 614} 615 616static int dnxhd_decode_frame(AVCodecContext *avctx, AVFrame *picture, 617 int *got_frame, AVPacket *avpkt) 618{ 619 const uint8_t *buf = avpkt->data; 620 int buf_size = avpkt->size; 621 DNXHDContext *ctx = avctx->priv_data; 622 int first_field = 1; 623 int ret, i; 624 625 ff_dlog(avctx, "frame size %d\n", buf_size); 626 627 for (i = 0; i < avctx->thread_count; i++) 628 ctx->rows[i].format = -1; 629 630decode_coding_unit: 631 if ((ret = dnxhd_decode_header(ctx, picture, buf, buf_size, first_field)) < 0) 632 return ret; 633 634 if ((avctx->width || avctx->height) && 635 (ctx->width != avctx->width || ctx->height != avctx->height)) { 636 av_log(avctx, AV_LOG_WARNING, "frame size changed: %dx%d -> %ux%u\n", 637 avctx->width, avctx->height, ctx->width, ctx->height); 638 first_field = 1; 639 } 640 if (avctx->pix_fmt != AV_PIX_FMT_NONE && avctx->pix_fmt != ctx->pix_fmt) { 641 av_log(avctx, AV_LOG_WARNING, "pix_fmt changed: %s -> %s\n", 642 av_get_pix_fmt_name(avctx->pix_fmt), av_get_pix_fmt_name(ctx->pix_fmt)); 643 first_field = 1; 644 } 645 646 avctx->pix_fmt = ctx->pix_fmt; 647 ret = ff_set_dimensions(avctx, ctx->width, ctx->height); 648 if (ret < 0) 649 return ret; 650 651 if (first_field) { 652 if ((ret = ff_thread_get_buffer(avctx, picture, 0)) < 0) 653 return ret; 654 picture->pict_type = AV_PICTURE_TYPE_I; 655 picture->key_frame = 1; 656 } 657 658 ctx->buf_size = buf_size - ctx->data_offset; 659 ctx->buf = buf + ctx->data_offset; 660 avctx->execute2(avctx, dnxhd_decode_row, picture, NULL, ctx->mb_height); 661 662 if (first_field && picture->interlaced_frame) { 663 buf += ctx->cid_table->coding_unit_size; 664 buf_size -= ctx->cid_table->coding_unit_size; 665 first_field = 0; 666 goto decode_coding_unit; 667 } 668 669 ret = 0; 670 for (i = 0; i < avctx->thread_count; i++) { 671 ret += ctx->rows[i].errors; 672 ctx->rows[i].errors = 0; 673 } 674 675 if (ctx->act) { 676 static int act_warned; 677 int format = ctx->rows[0].format; 678 for (i = 1; i < avctx->thread_count; i++) { 679 if (ctx->rows[i].format != format && 680 ctx->rows[i].format != -1 /* not run */) { 681 format = 2; 682 break; 683 } 684 } 685 switch (format) { 686 case -1: 687 case 2: 688 if (!act_warned) { 689 act_warned = 1; 690 av_log(ctx->avctx, AV_LOG_ERROR, 691 "Unsupported: variable ACT flag.\n"); 692 } 693 break; 694 case 0: 695 ctx->pix_fmt = ctx->bit_depth==10 696 ? AV_PIX_FMT_GBRP10 : AV_PIX_FMT_GBRP12; 697 break; 698 case 1: 699 ctx->pix_fmt = ctx->bit_depth==10 700 ? AV_PIX_FMT_YUV444P10 : AV_PIX_FMT_YUV444P12; 701 break; 702 } 703 } 704 avctx->pix_fmt = ctx->pix_fmt; 705 if (ret) { 706 av_log(ctx->avctx, AV_LOG_ERROR, "%d lines with errors\n", ret); 707 return AVERROR_INVALIDDATA; 708 } 709 710 *got_frame = 1; 711 return avpkt->size; 712} 713 714static av_cold int dnxhd_decode_close(AVCodecContext *avctx) 715{ 716 DNXHDContext *ctx = avctx->priv_data; 717 718 ff_free_vlc(&ctx->ac_vlc); 719 ff_free_vlc(&ctx->dc_vlc); 720 ff_free_vlc(&ctx->run_vlc); 721 722 av_freep(&ctx->rows); 723 724 return 0; 725} 726 727const FFCodec ff_dnxhd_decoder = { 728 .p.name = "dnxhd", 729 .p.long_name = NULL_IF_CONFIG_SMALL("VC3/DNxHD"), 730 .p.type = AVMEDIA_TYPE_VIDEO, 731 .p.id = AV_CODEC_ID_DNXHD, 732 .priv_data_size = sizeof(DNXHDContext), 733 .init = dnxhd_decode_init, 734 .close = dnxhd_decode_close, 735 FF_CODEC_DECODE_CB(dnxhd_decode_frame), 736 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS | 737 AV_CODEC_CAP_SLICE_THREADS, 738 .p.profiles = NULL_IF_CONFIG_SMALL(ff_dnxhd_profiles), 739 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, 740}; 741