1/* 2 * Indeo Video Interactive v5 compatible decoder 3 * Copyright (c) 2009 Maxim Poliakovski 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22/** 23 * @file 24 * Indeo Video Interactive version 5 decoder 25 * 26 * Indeo5 data is usually transported within .avi or .mov files. 27 * Known FOURCCs: 'IV50' 28 */ 29 30#define BITSTREAM_READER_LE 31#include "avcodec.h" 32#include "codec_internal.h" 33#include "get_bits.h" 34#include "ivi.h" 35#include "ivi_dsp.h" 36#include "indeo5data.h" 37 38/** 39 * Indeo5 frame types. 40 */ 41enum { 42 FRAMETYPE_INTRA = 0, 43 FRAMETYPE_INTER = 1, ///< non-droppable P-frame 44 FRAMETYPE_INTER_SCAL = 2, ///< droppable P-frame used in the scalability mode 45 FRAMETYPE_INTER_NOREF = 3, ///< droppable P-frame 46 FRAMETYPE_NULL = 4 ///< empty frame with no data 47}; 48 49#define IVI5_PIC_SIZE_ESC 15 50 51/** 52 * Decode Indeo5 GOP (Group of pictures) header. 53 * This header is present in key frames only. 54 * It defines parameters for all frames in a GOP. 55 * 56 * @param[in,out] ctx ptr to the decoder context 57 * @param[in] avctx ptr to the AVCodecContext 58 * @return result code: 0 = OK, -1 = error 59 */ 60static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx) 61{ 62 int result, i, p, tile_size, pic_size_indx, mb_size, blk_size, is_scalable; 63 int quant_mat, blk_size_changed = 0; 64 IVIBandDesc *band, *band1, *band2; 65 IVIPicConfig pic_conf; 66 67 ctx->gop_flags = get_bits(&ctx->gb, 8); 68 69 ctx->gop_hdr_size = (ctx->gop_flags & 1) ? get_bits(&ctx->gb, 16) : 0; 70 71 if (ctx->gop_flags & IVI5_IS_PROTECTED) 72 ctx->lock_word = get_bits_long(&ctx->gb, 32); 73 74 tile_size = (ctx->gop_flags & 0x40) ? 64 << get_bits(&ctx->gb, 2) : 0; 75 if (tile_size > 256) { 76 av_log(avctx, AV_LOG_ERROR, "Invalid tile size: %d\n", tile_size); 77 return AVERROR_INVALIDDATA; 78 } 79 80 /* decode number of wavelet bands */ 81 /* num_levels * 3 + 1 */ 82 pic_conf.luma_bands = get_bits(&ctx->gb, 2) * 3 + 1; 83 pic_conf.chroma_bands = get_bits1(&ctx->gb) * 3 + 1; 84 is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1; 85 if (is_scalable && (pic_conf.luma_bands != 4 || pic_conf.chroma_bands != 1)) { 86 av_log(avctx, AV_LOG_ERROR, "Scalability: unsupported subdivision! Luma bands: %d, chroma bands: %d\n", 87 pic_conf.luma_bands, pic_conf.chroma_bands); 88 return AVERROR_INVALIDDATA; 89 } 90 91 pic_size_indx = get_bits(&ctx->gb, 4); 92 if (pic_size_indx == IVI5_PIC_SIZE_ESC) { 93 pic_conf.pic_height = get_bits(&ctx->gb, 13); 94 pic_conf.pic_width = get_bits(&ctx->gb, 13); 95 } else { 96 pic_conf.pic_height = ivi5_common_pic_sizes[pic_size_indx * 2 + 1] << 2; 97 pic_conf.pic_width = ivi5_common_pic_sizes[pic_size_indx * 2 ] << 2; 98 } 99 100 if (ctx->gop_flags & 2) { 101 avpriv_report_missing_feature(avctx, "YV12 picture format"); 102 return AVERROR_PATCHWELCOME; 103 } 104 105 pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2; 106 pic_conf.chroma_width = (pic_conf.pic_width + 3) >> 2; 107 108 if (!tile_size) { 109 pic_conf.tile_height = pic_conf.pic_height; 110 pic_conf.tile_width = pic_conf.pic_width; 111 } else { 112 pic_conf.tile_height = pic_conf.tile_width = tile_size; 113 } 114 115 /* check if picture layout was changed and reallocate buffers */ 116 if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf) || ctx->gop_invalid) { 117 result = ff_ivi_init_planes(avctx, ctx->planes, &pic_conf, 0); 118 if (result < 0) { 119 av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n"); 120 return result; 121 } 122 ctx->pic_conf = pic_conf; 123 ctx->is_scalable = is_scalable; 124 blk_size_changed = 1; /* force reallocation of the internal structures */ 125 } 126 127 for (p = 0; p <= 1; p++) { 128 for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) { 129 band = &ctx->planes[p].bands[i]; 130 131 band->is_halfpel = get_bits1(&ctx->gb); 132 133 mb_size = get_bits1(&ctx->gb); 134 blk_size = 8 >> get_bits1(&ctx->gb); 135 mb_size = blk_size << !mb_size; 136 137 if (p==0 && blk_size==4) { 138 av_log(avctx, AV_LOG_ERROR, "4x4 luma blocks are unsupported!\n"); 139 return AVERROR_PATCHWELCOME; 140 } 141 142 blk_size_changed = mb_size != band->mb_size || blk_size != band->blk_size; 143 if (blk_size_changed) { 144 band->mb_size = mb_size; 145 band->blk_size = blk_size; 146 } 147 148 if (get_bits1(&ctx->gb)) { 149 avpriv_report_missing_feature(avctx, "Extended transform info"); 150 return AVERROR_PATCHWELCOME; 151 } 152 153 /* select transform function and scan pattern according to plane and band number */ 154 switch ((p << 2) + i) { 155 case 0: 156 band->inv_transform = ff_ivi_inverse_slant_8x8; 157 band->dc_transform = ff_ivi_dc_slant_2d; 158 band->scan = ff_zigzag_direct; 159 band->transform_size = 8; 160 break; 161 162 case 1: 163 band->inv_transform = ff_ivi_row_slant8; 164 band->dc_transform = ff_ivi_dc_row_slant; 165 band->scan = ff_ivi_vertical_scan_8x8; 166 band->transform_size = 8; 167 break; 168 169 case 2: 170 band->inv_transform = ff_ivi_col_slant8; 171 band->dc_transform = ff_ivi_dc_col_slant; 172 band->scan = ff_ivi_horizontal_scan_8x8; 173 band->transform_size = 8; 174 break; 175 176 case 3: 177 band->inv_transform = ff_ivi_put_pixels_8x8; 178 band->dc_transform = ff_ivi_put_dc_pixel_8x8; 179 band->scan = ff_ivi_horizontal_scan_8x8; 180 band->transform_size = 8; 181 break; 182 183 case 4: 184 band->inv_transform = ff_ivi_inverse_slant_4x4; 185 band->dc_transform = ff_ivi_dc_slant_2d; 186 band->scan = ff_ivi_direct_scan_4x4; 187 band->transform_size = 4; 188 break; 189 } 190 191 band->is_2d_trans = band->inv_transform == ff_ivi_inverse_slant_8x8 || 192 band->inv_transform == ff_ivi_inverse_slant_4x4; 193 194 if (band->transform_size != band->blk_size) { 195 av_log(avctx, AV_LOG_ERROR, "transform and block size mismatch (%d != %d)\n", band->transform_size, band->blk_size); 196 return AVERROR_INVALIDDATA; 197 } 198 199 /* select dequant matrix according to plane and band number */ 200 if (!p) { 201 quant_mat = (pic_conf.luma_bands > 1) ? i+1 : 0; 202 } else { 203 quant_mat = 5; 204 } 205 206 if (band->blk_size == 8) { 207 if(quant_mat >= 5){ 208 av_log(avctx, AV_LOG_ERROR, "quant_mat %d too large!\n", quant_mat); 209 return -1; 210 } 211 band->intra_base = &ivi5_base_quant_8x8_intra[quant_mat][0]; 212 band->inter_base = &ivi5_base_quant_8x8_inter[quant_mat][0]; 213 band->intra_scale = &ivi5_scale_quant_8x8_intra[quant_mat][0]; 214 band->inter_scale = &ivi5_scale_quant_8x8_inter[quant_mat][0]; 215 } else { 216 band->intra_base = ivi5_base_quant_4x4_intra; 217 band->inter_base = ivi5_base_quant_4x4_inter; 218 band->intra_scale = ivi5_scale_quant_4x4_intra; 219 band->inter_scale = ivi5_scale_quant_4x4_inter; 220 } 221 222 if (get_bits(&ctx->gb, 2)) { 223 av_log(avctx, AV_LOG_ERROR, "End marker missing!\n"); 224 return AVERROR_INVALIDDATA; 225 } 226 } 227 } 228 229 /* copy chroma parameters into the 2nd chroma plane */ 230 for (i = 0; i < pic_conf.chroma_bands; i++) { 231 band1 = &ctx->planes[1].bands[i]; 232 band2 = &ctx->planes[2].bands[i]; 233 234 band2->width = band1->width; 235 band2->height = band1->height; 236 band2->mb_size = band1->mb_size; 237 band2->blk_size = band1->blk_size; 238 band2->is_halfpel = band1->is_halfpel; 239 band2->intra_base = band1->intra_base; 240 band2->inter_base = band1->inter_base; 241 band2->intra_scale = band1->intra_scale; 242 band2->inter_scale = band1->inter_scale; 243 band2->scan = band1->scan; 244 band2->inv_transform = band1->inv_transform; 245 band2->dc_transform = band1->dc_transform; 246 band2->is_2d_trans = band1->is_2d_trans; 247 band2->transform_size= band1->transform_size; 248 } 249 250 /* reallocate internal structures if needed */ 251 if (blk_size_changed) { 252 result = ff_ivi_init_tiles(ctx->planes, pic_conf.tile_width, 253 pic_conf.tile_height); 254 if (result < 0) { 255 av_log(avctx, AV_LOG_ERROR, 256 "Couldn't reallocate internal structures!\n"); 257 return result; 258 } 259 } 260 261 if (ctx->gop_flags & 8) { 262 if (get_bits(&ctx->gb, 3)) { 263 av_log(avctx, AV_LOG_ERROR, "Alignment bits are not zero!\n"); 264 return AVERROR_INVALIDDATA; 265 } 266 267 if (get_bits1(&ctx->gb)) 268 skip_bits(&ctx->gb, 24); /* skip transparency fill color */ 269 } 270 271 align_get_bits(&ctx->gb); 272 273 skip_bits(&ctx->gb, 23); /* FIXME: unknown meaning */ 274 275 /* skip GOP extension if any */ 276 if (get_bits1(&ctx->gb)) { 277 do { 278 i = get_bits(&ctx->gb, 16); 279 } while (i & 0x8000); 280 } 281 282 align_get_bits(&ctx->gb); 283 284 return 0; 285} 286 287 288/** 289 * Skip a header extension. 290 * 291 * @param[in,out] gb the GetBit context 292 */ 293static inline int skip_hdr_extension(GetBitContext *gb) 294{ 295 int i, len; 296 297 do { 298 len = get_bits(gb, 8); 299 if (8*len > get_bits_left(gb)) 300 return AVERROR_INVALIDDATA; 301 for (i = 0; i < len; i++) skip_bits(gb, 8); 302 } while(len); 303 304 return 0; 305} 306 307 308/** 309 * Decode Indeo5 picture header. 310 * 311 * @param[in,out] ctx ptr to the decoder context 312 * @param[in] avctx ptr to the AVCodecContext 313 * @return result code: 0 = OK, -1 = error 314 */ 315static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx) 316{ 317 int ret; 318 319 if (get_bits(&ctx->gb, 5) != 0x1F) { 320 av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n"); 321 return AVERROR_INVALIDDATA; 322 } 323 324 ctx->prev_frame_type = ctx->frame_type; 325 ctx->frame_type = get_bits(&ctx->gb, 3); 326 if (ctx->frame_type >= 5) { 327 av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d \n", ctx->frame_type); 328 ctx->frame_type = FRAMETYPE_INTRA; 329 return AVERROR_INVALIDDATA; 330 } 331 332 ctx->frame_num = get_bits(&ctx->gb, 8); 333 334 if (ctx->frame_type == FRAMETYPE_INTRA) { 335 if ((ret = decode_gop_header(ctx, avctx)) < 0) { 336 av_log(avctx, AV_LOG_ERROR, "Invalid GOP header, skipping frames.\n"); 337 ctx->gop_invalid = 1; 338 return ret; 339 } 340 ctx->gop_invalid = 0; 341 } 342 343 if (ctx->frame_type == FRAMETYPE_INTER_SCAL && !ctx->is_scalable) { 344 av_log(avctx, AV_LOG_ERROR, "Scalable inter frame in non scalable stream\n"); 345 ctx->frame_type = FRAMETYPE_INTER; 346 return AVERROR_INVALIDDATA; 347 } 348 349 if (ctx->frame_type != FRAMETYPE_NULL) { 350 ctx->frame_flags = get_bits(&ctx->gb, 8); 351 352 ctx->pic_hdr_size = (ctx->frame_flags & 1) ? get_bits(&ctx->gb, 24) : 0; 353 354 ctx->checksum = (ctx->frame_flags & 0x10) ? get_bits(&ctx->gb, 16) : 0; 355 356 /* skip unknown extension if any */ 357 if (ctx->frame_flags & 0x20) 358 skip_hdr_extension(&ctx->gb); /* XXX: untested */ 359 360 /* decode macroblock huffman codebook */ 361 ret = ff_ivi_dec_huff_desc(&ctx->gb, ctx->frame_flags & 0x40, 362 IVI_MB_HUFF, &ctx->mb_vlc, avctx); 363 if (ret < 0) 364 return ret; 365 366 skip_bits(&ctx->gb, 3); /* FIXME: unknown meaning! */ 367 } 368 369 align_get_bits(&ctx->gb); 370 371 return 0; 372} 373 374 375/** 376 * Decode Indeo5 band header. 377 * 378 * @param[in,out] ctx ptr to the decoder context 379 * @param[in,out] band ptr to the band descriptor 380 * @param[in] avctx ptr to the AVCodecContext 381 * @return result code: 0 = OK, -1 = error 382 */ 383static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band, 384 AVCodecContext *avctx) 385{ 386 int i, ret; 387 uint8_t band_flags; 388 389 band_flags = get_bits(&ctx->gb, 8); 390 391 if (band_flags & 1) { 392 band->is_empty = 1; 393 return 0; 394 } 395 396 band->data_size = (ctx->frame_flags & 0x80) ? get_bits(&ctx->gb, 24) : 0; 397 398 band->inherit_mv = band_flags & 2; 399 band->inherit_qdelta = band_flags & 8; 400 band->qdelta_present = band_flags & 4; 401 if (!band->qdelta_present) band->inherit_qdelta = 1; 402 403 /* decode rvmap probability corrections if any */ 404 band->num_corr = 0; /* there are no corrections */ 405 if (band_flags & 0x10) { 406 band->num_corr = get_bits(&ctx->gb, 8); /* get number of correction pairs */ 407 if (band->num_corr > 61) { 408 av_log(avctx, AV_LOG_ERROR, "Too many corrections: %d\n", 409 band->num_corr); 410 return AVERROR_INVALIDDATA; 411 } 412 413 /* read correction pairs */ 414 for (i = 0; i < band->num_corr * 2; i++) 415 band->corr[i] = get_bits(&ctx->gb, 8); 416 } 417 418 /* select appropriate rvmap table for this band */ 419 band->rvmap_sel = (band_flags & 0x40) ? get_bits(&ctx->gb, 3) : 8; 420 421 /* decode block huffman codebook */ 422 ret = ff_ivi_dec_huff_desc(&ctx->gb, band_flags & 0x80, IVI_BLK_HUFF, 423 &band->blk_vlc, avctx); 424 if (ret < 0) 425 return ret; 426 427 band->checksum_present = get_bits1(&ctx->gb); 428 if (band->checksum_present) 429 band->checksum = get_bits(&ctx->gb, 16); 430 431 band->glob_quant = get_bits(&ctx->gb, 5); 432 433 /* skip unknown extension if any */ 434 if (band_flags & 0x20) { /* XXX: untested */ 435 align_get_bits(&ctx->gb); 436 skip_hdr_extension(&ctx->gb); 437 } 438 439 align_get_bits(&ctx->gb); 440 441 return 0; 442} 443 444 445/** 446 * Decode info (block type, cbp, quant delta, motion vector) 447 * for all macroblocks in the current tile. 448 * 449 * @param[in,out] ctx ptr to the decoder context 450 * @param[in,out] band ptr to the band descriptor 451 * @param[in,out] tile ptr to the tile descriptor 452 * @param[in] avctx ptr to the AVCodecContext 453 * @return result code: 0 = OK, -1 = error 454 */ 455static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band, 456 IVITile *tile, AVCodecContext *avctx) 457{ 458 int x, y, mv_x, mv_y, mv_delta, offs, mb_offset, 459 mv_scale, blks_per_mb, s; 460 IVIMbInfo *mb, *ref_mb; 461 int row_offset = band->mb_size * band->pitch; 462 463 mb = tile->mbs; 464 ref_mb = tile->ref_mbs; 465 offs = tile->ypos * band->pitch + tile->xpos; 466 467 if (!ref_mb && 468 ((band->qdelta_present && band->inherit_qdelta) || band->inherit_mv)) 469 return AVERROR_INVALIDDATA; 470 471 if (tile->num_MBs != IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size)) { 472 av_log(avctx, AV_LOG_ERROR, "Allocated tile size %d mismatches parameters %d\n", 473 tile->num_MBs, IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size)); 474 return AVERROR_INVALIDDATA; 475 } 476 477 /* scale factor for motion vectors */ 478 mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3); 479 mv_x = mv_y = 0; 480 481 for (y = tile->ypos; y < (tile->ypos + tile->height); y += band->mb_size) { 482 mb_offset = offs; 483 484 for (x = tile->xpos; x < (tile->xpos + tile->width); x += band->mb_size) { 485 mb->xpos = x; 486 mb->ypos = y; 487 mb->buf_offs = mb_offset; 488 489 if (get_bits1(&ctx->gb)) { 490 if (ctx->frame_type == FRAMETYPE_INTRA) { 491 av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n"); 492 return AVERROR_INVALIDDATA; 493 } 494 mb->type = 1; /* empty macroblocks are always INTER */ 495 mb->cbp = 0; /* all blocks are empty */ 496 497 mb->q_delta = 0; 498 if (!band->plane && !band->band_num && (ctx->frame_flags & 8)) { 499 mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, 500 IVI_VLC_BITS, 1); 501 mb->q_delta = IVI_TOSIGNED(mb->q_delta); 502 } 503 504 mb->mv_x = mb->mv_y = 0; /* no motion vector coded */ 505 if (band->inherit_mv && ref_mb){ 506 /* motion vector inheritance */ 507 if (mv_scale) { 508 mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale); 509 mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale); 510 } else { 511 mb->mv_x = ref_mb->mv_x; 512 mb->mv_y = ref_mb->mv_y; 513 } 514 } 515 } else { 516 if (band->inherit_mv && ref_mb) { 517 mb->type = ref_mb->type; /* copy mb_type from corresponding reference mb */ 518 } else if (ctx->frame_type == FRAMETYPE_INTRA) { 519 mb->type = 0; /* mb_type is always INTRA for intra-frames */ 520 } else { 521 mb->type = get_bits1(&ctx->gb); 522 } 523 524 blks_per_mb = band->mb_size != band->blk_size ? 4 : 1; 525 mb->cbp = get_bits(&ctx->gb, blks_per_mb); 526 527 mb->q_delta = 0; 528 if (band->qdelta_present) { 529 if (band->inherit_qdelta) { 530 if (ref_mb) mb->q_delta = ref_mb->q_delta; 531 } else if (mb->cbp || (!band->plane && !band->band_num && 532 (ctx->frame_flags & 8))) { 533 mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, 534 IVI_VLC_BITS, 1); 535 mb->q_delta = IVI_TOSIGNED(mb->q_delta); 536 } 537 } 538 539 if (!mb->type) { 540 mb->mv_x = mb->mv_y = 0; /* there is no motion vector in intra-macroblocks */ 541 } else { 542 if (band->inherit_mv && ref_mb){ 543 /* motion vector inheritance */ 544 if (mv_scale) { 545 mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale); 546 mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale); 547 } else { 548 mb->mv_x = ref_mb->mv_x; 549 mb->mv_y = ref_mb->mv_y; 550 } 551 } else { 552 /* decode motion vector deltas */ 553 mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, 554 IVI_VLC_BITS, 1); 555 mv_y += IVI_TOSIGNED(mv_delta); 556 mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, 557 IVI_VLC_BITS, 1); 558 mv_x += IVI_TOSIGNED(mv_delta); 559 mb->mv_x = mv_x; 560 mb->mv_y = mv_y; 561 } 562 } 563 } 564 565 s= band->is_halfpel; 566 if (mb->type) 567 if ( x + (mb->mv_x >>s) + (y+ (mb->mv_y >>s))*band->pitch < 0 || 568 x + ((mb->mv_x+s)>>s) + band->mb_size - 1 569 + (y+band->mb_size - 1 +((mb->mv_y+s)>>s))*band->pitch > band->bufsize - 1) { 570 av_log(avctx, AV_LOG_ERROR, "motion vector %d %d outside reference\n", x*s + mb->mv_x, y*s + mb->mv_y); 571 return AVERROR_INVALIDDATA; 572 } 573 574 mb++; 575 if (ref_mb) 576 ref_mb++; 577 mb_offset += band->mb_size; 578 } 579 580 offs += row_offset; 581 } 582 583 align_get_bits(&ctx->gb); 584 585 return 0; 586} 587 588 589/** 590 * Switch buffers. 591 * 592 * @param[in,out] ctx ptr to the decoder context 593 */ 594static void switch_buffers(IVI45DecContext *ctx) 595{ 596 switch (ctx->prev_frame_type) { 597 case FRAMETYPE_INTRA: 598 case FRAMETYPE_INTER: 599 ctx->buf_switch ^= 1; 600 ctx->dst_buf = ctx->buf_switch; 601 ctx->ref_buf = ctx->buf_switch ^ 1; 602 break; 603 case FRAMETYPE_INTER_SCAL: 604 if (!ctx->inter_scal) { 605 ctx->ref2_buf = 2; 606 ctx->inter_scal = 1; 607 } 608 FFSWAP(int, ctx->dst_buf, ctx->ref2_buf); 609 ctx->ref_buf = ctx->ref2_buf; 610 break; 611 case FRAMETYPE_INTER_NOREF: 612 break; 613 } 614 615 switch (ctx->frame_type) { 616 case FRAMETYPE_INTRA: 617 ctx->buf_switch = 0; 618 /* FALLTHROUGH */ 619 case FRAMETYPE_INTER: 620 ctx->inter_scal = 0; 621 ctx->dst_buf = ctx->buf_switch; 622 ctx->ref_buf = ctx->buf_switch ^ 1; 623 break; 624 case FRAMETYPE_INTER_SCAL: 625 case FRAMETYPE_INTER_NOREF: 626 case FRAMETYPE_NULL: 627 break; 628 } 629} 630 631 632static int is_nonnull_frame(IVI45DecContext *ctx) 633{ 634 return ctx->frame_type != FRAMETYPE_NULL; 635} 636 637 638/** 639 * Initialize Indeo5 decoder. 640 */ 641static av_cold int decode_init(AVCodecContext *avctx) 642{ 643 IVI45DecContext *ctx = avctx->priv_data; 644 int result; 645 646 ctx->gop_invalid = 1; 647 648 ff_ivi_init_static_vlc(); 649 650 /* copy rvmap tables in our context so we can apply changes to them */ 651 memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs)); 652 653 /* set the initial picture layout according to the basic profile: 654 there is only one band per plane (no scalability), only one tile (no local decoding) 655 and picture format = YVU9 */ 656 ctx->pic_conf.pic_width = avctx->width; 657 ctx->pic_conf.pic_height = avctx->height; 658 ctx->pic_conf.chroma_width = (avctx->width + 3) >> 2; 659 ctx->pic_conf.chroma_height = (avctx->height + 3) >> 2; 660 ctx->pic_conf.tile_width = avctx->width; 661 ctx->pic_conf.tile_height = avctx->height; 662 ctx->pic_conf.luma_bands = ctx->pic_conf.chroma_bands = 1; 663 664 result = ff_ivi_init_planes(avctx, ctx->planes, &ctx->pic_conf, 0); 665 if (result) { 666 av_log(avctx, AV_LOG_ERROR, "Couldn't allocate color planes!\n"); 667 return AVERROR_INVALIDDATA; 668 } 669 670 ctx->buf_switch = 0; 671 ctx->inter_scal = 0; 672 673 ctx->decode_pic_hdr = decode_pic_hdr; 674 ctx->decode_band_hdr = decode_band_hdr; 675 ctx->decode_mb_info = decode_mb_info; 676 ctx->switch_buffers = switch_buffers; 677 ctx->is_nonnull_frame = is_nonnull_frame; 678 679 ctx->is_indeo4 = 0; 680 681 avctx->pix_fmt = AV_PIX_FMT_YUV410P; 682 683 return 0; 684} 685 686const FFCodec ff_indeo5_decoder = { 687 .p.name = "indeo5", 688 .p.long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"), 689 .p.type = AVMEDIA_TYPE_VIDEO, 690 .p.id = AV_CODEC_ID_INDEO5, 691 .priv_data_size = sizeof(IVI45DecContext), 692 .init = decode_init, 693 .close = ff_ivi_decode_close, 694 FF_CODEC_DECODE_CB(ff_ivi_decode_frame), 695 .p.capabilities = AV_CODEC_CAP_DR1, 696 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP, 697}; 698