| 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 "get_bits.h" |
| 33 | #include "ivi_dsp.h" |
| 34 | #include "ivi_common.h" |
| 35 | #include "indeo5data.h" |
| 36 | |
| 37 | /** |
| 38 | * Indeo5 frame types. |
| 39 | */ |
| 40 | enum { |
| 41 | FRAMETYPE_INTRA = 0, |
| 42 | FRAMETYPE_INTER = 1, ///< non-droppable P-frame |
| 43 | FRAMETYPE_INTER_SCAL = 2, ///< droppable P-frame used in the scalability mode |
| 44 | FRAMETYPE_INTER_NOREF = 3, ///< droppable P-frame |
| 45 | FRAMETYPE_NULL = 4 ///< empty frame with no data |
| 46 | }; |
| 47 | |
| 48 | #define IVI5_PIC_SIZE_ESC 15 |
| 49 | |
| 50 | /** |
| 51 | * Decode Indeo5 GOP (Group of pictures) header. |
| 52 | * This header is present in key frames only. |
| 53 | * It defines parameters for all frames in a GOP. |
| 54 | * |
| 55 | * @param[in,out] ctx ptr to the decoder context |
| 56 | * @param[in] avctx ptr to the AVCodecContext |
| 57 | * @return result code: 0 = OK, -1 = error |
| 58 | */ |
| 59 | static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx) |
| 60 | { |
| 61 | int result, i, p, tile_size, pic_size_indx, mb_size, blk_size, is_scalable; |
| 62 | int quant_mat, blk_size_changed = 0; |
| 63 | IVIBandDesc *band, *band1, *band2; |
| 64 | IVIPicConfig pic_conf; |
| 65 | |
| 66 | ctx->gop_flags = get_bits(&ctx->gb, 8); |
| 67 | |
| 68 | ctx->gop_hdr_size = (ctx->gop_flags & 1) ? get_bits(&ctx->gb, 16) : 0; |
| 69 | |
| 70 | if (ctx->gop_flags & IVI5_IS_PROTECTED) |
| 71 | ctx->lock_word = get_bits_long(&ctx->gb, 32); |
| 72 | |
| 73 | tile_size = (ctx->gop_flags & 0x40) ? 64 << get_bits(&ctx->gb, 2) : 0; |
| 74 | if (tile_size > 256) { |
| 75 | av_log(avctx, AV_LOG_ERROR, "Invalid tile size: %d\n", tile_size); |
| 76 | return AVERROR_INVALIDDATA; |
| 77 | } |
| 78 | |
| 79 | /* decode number of wavelet bands */ |
| 80 | /* num_levels * 3 + 1 */ |
| 81 | pic_conf.luma_bands = get_bits(&ctx->gb, 2) * 3 + 1; |
| 82 | pic_conf.chroma_bands = get_bits1(&ctx->gb) * 3 + 1; |
| 83 | is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1; |
| 84 | if (is_scalable && (pic_conf.luma_bands != 4 || pic_conf.chroma_bands != 1)) { |
| 85 | av_log(avctx, AV_LOG_ERROR, "Scalability: unsupported subdivision! Luma bands: %d, chroma bands: %d\n", |
| 86 | pic_conf.luma_bands, pic_conf.chroma_bands); |
| 87 | return AVERROR_INVALIDDATA; |
| 88 | } |
| 89 | |
| 90 | pic_size_indx = get_bits(&ctx->gb, 4); |
| 91 | if (pic_size_indx == IVI5_PIC_SIZE_ESC) { |
| 92 | pic_conf.pic_height = get_bits(&ctx->gb, 13); |
| 93 | pic_conf.pic_width = get_bits(&ctx->gb, 13); |
| 94 | } else { |
| 95 | pic_conf.pic_height = ivi5_common_pic_sizes[pic_size_indx * 2 + 1] << 2; |
| 96 | pic_conf.pic_width = ivi5_common_pic_sizes[pic_size_indx * 2 ] << 2; |
| 97 | } |
| 98 | |
| 99 | if (ctx->gop_flags & 2) { |
| 100 | avpriv_report_missing_feature(avctx, "YV12 picture format"); |
| 101 | return AVERROR_PATCHWELCOME; |
| 102 | } |
| 103 | |
| 104 | pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2; |
| 105 | pic_conf.chroma_width = (pic_conf.pic_width + 3) >> 2; |
| 106 | |
| 107 | if (!tile_size) { |
| 108 | pic_conf.tile_height = pic_conf.pic_height; |
| 109 | pic_conf.tile_width = pic_conf.pic_width; |
| 110 | } else { |
| 111 | pic_conf.tile_height = pic_conf.tile_width = tile_size; |
| 112 | } |
| 113 | |
| 114 | /* check if picture layout was changed and reallocate buffers */ |
| 115 | if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf) || ctx->gop_invalid) { |
| 116 | result = ff_ivi_init_planes(ctx->planes, &pic_conf, 0); |
| 117 | if (result < 0) { |
| 118 | av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n"); |
| 119 | return result; |
| 120 | } |
| 121 | ctx->pic_conf = pic_conf; |
| 122 | ctx->is_scalable = is_scalable; |
| 123 | blk_size_changed = 1; /* force reallocation of the internal structures */ |
| 124 | } |
| 125 | |
| 126 | for (p = 0; p <= 1; p++) { |
| 127 | for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) { |
| 128 | band = &ctx->planes[p].bands[i]; |
| 129 | |
| 130 | band->is_halfpel = get_bits1(&ctx->gb); |
| 131 | |
| 132 | mb_size = get_bits1(&ctx->gb); |
| 133 | blk_size = 8 >> get_bits1(&ctx->gb); |
| 134 | mb_size = blk_size << !mb_size; |
| 135 | |
| 136 | if (p==0 && blk_size==4) { |
| 137 | av_log(avctx, AV_LOG_ERROR, "4x4 luma blocks are unsupported!\n"); |
| 138 | return AVERROR_PATCHWELCOME; |
| 139 | } |
| 140 | |
| 141 | blk_size_changed = mb_size != band->mb_size || blk_size != band->blk_size; |
| 142 | if (blk_size_changed) { |
| 143 | band->mb_size = mb_size; |
| 144 | band->blk_size = blk_size; |
| 145 | } |
| 146 | |
| 147 | if (get_bits1(&ctx->gb)) { |
| 148 | avpriv_report_missing_feature(avctx, "Extended transform info"); |
| 149 | return AVERROR_PATCHWELCOME; |
| 150 | } |
| 151 | |
| 152 | /* select transform function and scan pattern according to plane and band number */ |
| 153 | switch ((p << 2) + i) { |
| 154 | case 0: |
| 155 | band->inv_transform = ff_ivi_inverse_slant_8x8; |
| 156 | band->dc_transform = ff_ivi_dc_slant_2d; |
| 157 | band->scan = ff_zigzag_direct; |
| 158 | band->transform_size = 8; |
| 159 | break; |
| 160 | |
| 161 | case 1: |
| 162 | band->inv_transform = ff_ivi_row_slant8; |
| 163 | band->dc_transform = ff_ivi_dc_row_slant; |
| 164 | band->scan = ff_ivi_vertical_scan_8x8; |
| 165 | band->transform_size = 8; |
| 166 | break; |
| 167 | |
| 168 | case 2: |
| 169 | band->inv_transform = ff_ivi_col_slant8; |
| 170 | band->dc_transform = ff_ivi_dc_col_slant; |
| 171 | band->scan = ff_ivi_horizontal_scan_8x8; |
| 172 | band->transform_size = 8; |
| 173 | break; |
| 174 | |
| 175 | case 3: |
| 176 | band->inv_transform = ff_ivi_put_pixels_8x8; |
| 177 | band->dc_transform = ff_ivi_put_dc_pixel_8x8; |
| 178 | band->scan = ff_ivi_horizontal_scan_8x8; |
| 179 | band->transform_size = 8; |
| 180 | break; |
| 181 | |
| 182 | case 4: |
| 183 | band->inv_transform = ff_ivi_inverse_slant_4x4; |
| 184 | band->dc_transform = ff_ivi_dc_slant_2d; |
| 185 | band->scan = ff_ivi_direct_scan_4x4; |
| 186 | band->transform_size = 4; |
| 187 | break; |
| 188 | } |
| 189 | |
| 190 | band->is_2d_trans = band->inv_transform == ff_ivi_inverse_slant_8x8 || |
| 191 | band->inv_transform == ff_ivi_inverse_slant_4x4; |
| 192 | |
| 193 | if (band->transform_size != band->blk_size) { |
| 194 | av_log(avctx, AV_LOG_ERROR, "transform and block size mismatch (%d != %d)\n", band->transform_size, band->blk_size); |
| 195 | return AVERROR_INVALIDDATA; |
| 196 | } |
| 197 | |
| 198 | /* select dequant matrix according to plane and band number */ |
| 199 | if (!p) { |
| 200 | quant_mat = (pic_conf.luma_bands > 1) ? i+1 : 0; |
| 201 | } else { |
| 202 | quant_mat = 5; |
| 203 | } |
| 204 | |
| 205 | if (band->blk_size == 8) { |
| 206 | if(quant_mat >= 5){ |
| 207 | av_log(avctx, AV_LOG_ERROR, "quant_mat %d too large!\n", quant_mat); |
| 208 | return -1; |
| 209 | } |
| 210 | band->intra_base = &ivi5_base_quant_8x8_intra[quant_mat][0]; |
| 211 | band->inter_base = &ivi5_base_quant_8x8_inter[quant_mat][0]; |
| 212 | band->intra_scale = &ivi5_scale_quant_8x8_intra[quant_mat][0]; |
| 213 | band->inter_scale = &ivi5_scale_quant_8x8_inter[quant_mat][0]; |
| 214 | } else { |
| 215 | band->intra_base = ivi5_base_quant_4x4_intra; |
| 216 | band->inter_base = ivi5_base_quant_4x4_inter; |
| 217 | band->intra_scale = ivi5_scale_quant_4x4_intra; |
| 218 | band->inter_scale = ivi5_scale_quant_4x4_inter; |
| 219 | } |
| 220 | |
| 221 | if (get_bits(&ctx->gb, 2)) { |
| 222 | av_log(avctx, AV_LOG_ERROR, "End marker missing!\n"); |
| 223 | return AVERROR_INVALIDDATA; |
| 224 | } |
| 225 | } |
| 226 | } |
| 227 | |
| 228 | /* copy chroma parameters into the 2nd chroma plane */ |
| 229 | for (i = 0; i < pic_conf.chroma_bands; i++) { |
| 230 | band1 = &ctx->planes[1].bands[i]; |
| 231 | band2 = &ctx->planes[2].bands[i]; |
| 232 | |
| 233 | band2->width = band1->width; |
| 234 | band2->height = band1->height; |
| 235 | band2->mb_size = band1->mb_size; |
| 236 | band2->blk_size = band1->blk_size; |
| 237 | band2->is_halfpel = band1->is_halfpel; |
| 238 | band2->intra_base = band1->intra_base; |
| 239 | band2->inter_base = band1->inter_base; |
| 240 | band2->intra_scale = band1->intra_scale; |
| 241 | band2->inter_scale = band1->inter_scale; |
| 242 | band2->scan = band1->scan; |
| 243 | band2->inv_transform = band1->inv_transform; |
| 244 | band2->dc_transform = band1->dc_transform; |
| 245 | band2->is_2d_trans = band1->is_2d_trans; |
| 246 | band2->transform_size= band1->transform_size; |
| 247 | } |
| 248 | |
| 249 | /* reallocate internal structures if needed */ |
| 250 | if (blk_size_changed) { |
| 251 | result = ff_ivi_init_tiles(ctx->planes, pic_conf.tile_width, |
| 252 | pic_conf.tile_height); |
| 253 | if (result < 0) { |
| 254 | av_log(avctx, AV_LOG_ERROR, |
| 255 | "Couldn't reallocate internal structures!\n"); |
| 256 | return result; |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | if (ctx->gop_flags & 8) { |
| 261 | if (get_bits(&ctx->gb, 3)) { |
| 262 | av_log(avctx, AV_LOG_ERROR, "Alignment bits are not zero!\n"); |
| 263 | return AVERROR_INVALIDDATA; |
| 264 | } |
| 265 | |
| 266 | if (get_bits1(&ctx->gb)) |
| 267 | skip_bits_long(&ctx->gb, 24); /* skip transparency fill color */ |
| 268 | } |
| 269 | |
| 270 | align_get_bits(&ctx->gb); |
| 271 | |
| 272 | skip_bits(&ctx->gb, 23); /* FIXME: unknown meaning */ |
| 273 | |
| 274 | /* skip GOP extension if any */ |
| 275 | if (get_bits1(&ctx->gb)) { |
| 276 | do { |
| 277 | i = get_bits(&ctx->gb, 16); |
| 278 | } while (i & 0x8000); |
| 279 | } |
| 280 | |
| 281 | align_get_bits(&ctx->gb); |
| 282 | |
| 283 | return 0; |
| 284 | } |
| 285 | |
| 286 | |
| 287 | /** |
| 288 | * Skip a header extension. |
| 289 | * |
| 290 | * @param[in,out] gb the GetBit context |
| 291 | */ |
| 292 | static inline int skip_hdr_extension(GetBitContext *gb) |
| 293 | { |
| 294 | int i, len; |
| 295 | |
| 296 | do { |
| 297 | len = get_bits(gb, 8); |
| 298 | if (8*len > get_bits_left(gb)) |
| 299 | return AVERROR_INVALIDDATA; |
| 300 | for (i = 0; i < len; i++) skip_bits(gb, 8); |
| 301 | } while(len); |
| 302 | |
| 303 | return 0; |
| 304 | } |
| 305 | |
| 306 | |
| 307 | /** |
| 308 | * Decode Indeo5 picture header. |
| 309 | * |
| 310 | * @param[in,out] ctx ptr to the decoder context |
| 311 | * @param[in] avctx ptr to the AVCodecContext |
| 312 | * @return result code: 0 = OK, -1 = error |
| 313 | */ |
| 314 | static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx) |
| 315 | { |
| 316 | int ret; |
| 317 | |
| 318 | if (get_bits(&ctx->gb, 5) != 0x1F) { |
| 319 | av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n"); |
| 320 | return AVERROR_INVALIDDATA; |
| 321 | } |
| 322 | |
| 323 | ctx->prev_frame_type = ctx->frame_type; |
| 324 | ctx->frame_type = get_bits(&ctx->gb, 3); |
| 325 | if (ctx->frame_type >= 5) { |
| 326 | av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d \n", ctx->frame_type); |
| 327 | return AVERROR_INVALIDDATA; |
| 328 | } |
| 329 | |
| 330 | ctx->frame_num = get_bits(&ctx->gb, 8); |
| 331 | |
| 332 | if (ctx->frame_type == FRAMETYPE_INTRA) { |
| 333 | if ((ret = decode_gop_header(ctx, avctx)) < 0) { |
| 334 | av_log(avctx, AV_LOG_ERROR, "Invalid GOP header, skipping frames.\n"); |
| 335 | ctx->gop_invalid = 1; |
| 336 | return ret; |
| 337 | } |
| 338 | ctx->gop_invalid = 0; |
| 339 | } |
| 340 | |
| 341 | if (ctx->frame_type == FRAMETYPE_INTER_SCAL && !ctx->is_scalable) { |
| 342 | av_log(avctx, AV_LOG_ERROR, "Scalable inter frame in non scalable stream\n"); |
| 343 | ctx->frame_type = FRAMETYPE_INTER; |
| 344 | return AVERROR_INVALIDDATA; |
| 345 | } |
| 346 | |
| 347 | if (ctx->frame_type != FRAMETYPE_NULL) { |
| 348 | ctx->frame_flags = get_bits(&ctx->gb, 8); |
| 349 | |
| 350 | ctx->pic_hdr_size = (ctx->frame_flags & 1) ? get_bits_long(&ctx->gb, 24) : 0; |
| 351 | |
| 352 | ctx->checksum = (ctx->frame_flags & 0x10) ? get_bits(&ctx->gb, 16) : 0; |
| 353 | |
| 354 | /* skip unknown extension if any */ |
| 355 | if (ctx->frame_flags & 0x20) |
| 356 | skip_hdr_extension(&ctx->gb); /* XXX: untested */ |
| 357 | |
| 358 | /* decode macroblock huffman codebook */ |
| 359 | ret = ff_ivi_dec_huff_desc(&ctx->gb, ctx->frame_flags & 0x40, |
| 360 | IVI_MB_HUFF, &ctx->mb_vlc, avctx); |
| 361 | if (ret < 0) |
| 362 | return ret; |
| 363 | |
| 364 | skip_bits(&ctx->gb, 3); /* FIXME: unknown meaning! */ |
| 365 | } |
| 366 | |
| 367 | align_get_bits(&ctx->gb); |
| 368 | |
| 369 | return 0; |
| 370 | } |
| 371 | |
| 372 | |
| 373 | /** |
| 374 | * Decode Indeo5 band header. |
| 375 | * |
| 376 | * @param[in,out] ctx ptr to the decoder context |
| 377 | * @param[in,out] band ptr to the band descriptor |
| 378 | * @param[in] avctx ptr to the AVCodecContext |
| 379 | * @return result code: 0 = OK, -1 = error |
| 380 | */ |
| 381 | static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band, |
| 382 | AVCodecContext *avctx) |
| 383 | { |
| 384 | int i, ret; |
| 385 | uint8_t band_flags; |
| 386 | |
| 387 | band_flags = get_bits(&ctx->gb, 8); |
| 388 | |
| 389 | if (band_flags & 1) { |
| 390 | band->is_empty = 1; |
| 391 | return 0; |
| 392 | } |
| 393 | |
| 394 | band->data_size = (ctx->frame_flags & 0x80) ? get_bits_long(&ctx->gb, 24) : 0; |
| 395 | |
| 396 | band->inherit_mv = band_flags & 2; |
| 397 | band->inherit_qdelta = band_flags & 8; |
| 398 | band->qdelta_present = band_flags & 4; |
| 399 | if (!band->qdelta_present) band->inherit_qdelta = 1; |
| 400 | |
| 401 | /* decode rvmap probability corrections if any */ |
| 402 | band->num_corr = 0; /* there are no corrections */ |
| 403 | if (band_flags & 0x10) { |
| 404 | band->num_corr = get_bits(&ctx->gb, 8); /* get number of correction pairs */ |
| 405 | if (band->num_corr > 61) { |
| 406 | av_log(avctx, AV_LOG_ERROR, "Too many corrections: %d\n", |
| 407 | band->num_corr); |
| 408 | return AVERROR_INVALIDDATA; |
| 409 | } |
| 410 | |
| 411 | /* read correction pairs */ |
| 412 | for (i = 0; i < band->num_corr * 2; i++) |
| 413 | band->corr[i] = get_bits(&ctx->gb, 8); |
| 414 | } |
| 415 | |
| 416 | /* select appropriate rvmap table for this band */ |
| 417 | band->rvmap_sel = (band_flags & 0x40) ? get_bits(&ctx->gb, 3) : 8; |
| 418 | |
| 419 | /* decode block huffman codebook */ |
| 420 | ret = ff_ivi_dec_huff_desc(&ctx->gb, band_flags & 0x80, IVI_BLK_HUFF, |
| 421 | &band->blk_vlc, avctx); |
| 422 | if (ret < 0) |
| 423 | return ret; |
| 424 | |
| 425 | band->checksum_present = get_bits1(&ctx->gb); |
| 426 | if (band->checksum_present) |
| 427 | band->checksum = get_bits(&ctx->gb, 16); |
| 428 | |
| 429 | band->glob_quant = get_bits(&ctx->gb, 5); |
| 430 | |
| 431 | /* skip unknown extension if any */ |
| 432 | if (band_flags & 0x20) { /* XXX: untested */ |
| 433 | align_get_bits(&ctx->gb); |
| 434 | skip_hdr_extension(&ctx->gb); |
| 435 | } |
| 436 | |
| 437 | align_get_bits(&ctx->gb); |
| 438 | |
| 439 | return 0; |
| 440 | } |
| 441 | |
| 442 | |
| 443 | /** |
| 444 | * Decode info (block type, cbp, quant delta, motion vector) |
| 445 | * for all macroblocks in the current tile. |
| 446 | * |
| 447 | * @param[in,out] ctx ptr to the decoder context |
| 448 | * @param[in,out] band ptr to the band descriptor |
| 449 | * @param[in,out] tile ptr to the tile descriptor |
| 450 | * @param[in] avctx ptr to the AVCodecContext |
| 451 | * @return result code: 0 = OK, -1 = error |
| 452 | */ |
| 453 | static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band, |
| 454 | IVITile *tile, AVCodecContext *avctx) |
| 455 | { |
| 456 | int x, y, mv_x, mv_y, mv_delta, offs, mb_offset, |
| 457 | mv_scale, blks_per_mb, s; |
| 458 | IVIMbInfo *mb, *ref_mb; |
| 459 | int row_offset = band->mb_size * band->pitch; |
| 460 | |
| 461 | mb = tile->mbs; |
| 462 | ref_mb = tile->ref_mbs; |
| 463 | offs = tile->ypos * band->pitch + tile->xpos; |
| 464 | |
| 465 | if (!ref_mb && |
| 466 | ((band->qdelta_present && band->inherit_qdelta) || band->inherit_mv)) |
| 467 | return AVERROR_INVALIDDATA; |
| 468 | |
| 469 | if (tile->num_MBs != IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size)) { |
| 470 | av_log(avctx, AV_LOG_ERROR, "Allocated tile size %d mismatches parameters %d\n", |
| 471 | tile->num_MBs, IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size)); |
| 472 | return AVERROR_INVALIDDATA; |
| 473 | } |
| 474 | |
| 475 | /* scale factor for motion vectors */ |
| 476 | mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3); |
| 477 | mv_x = mv_y = 0; |
| 478 | |
| 479 | for (y = tile->ypos; y < (tile->ypos + tile->height); y += band->mb_size) { |
| 480 | mb_offset = offs; |
| 481 | |
| 482 | for (x = tile->xpos; x < (tile->xpos + tile->width); x += band->mb_size) { |
| 483 | mb->xpos = x; |
| 484 | mb->ypos = y; |
| 485 | mb->buf_offs = mb_offset; |
| 486 | |
| 487 | if (get_bits1(&ctx->gb)) { |
| 488 | if (ctx->frame_type == FRAMETYPE_INTRA) { |
| 489 | av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n"); |
| 490 | return AVERROR_INVALIDDATA; |
| 491 | } |
| 492 | mb->type = 1; /* empty macroblocks are always INTER */ |
| 493 | mb->cbp = 0; /* all blocks are empty */ |
| 494 | |
| 495 | mb->q_delta = 0; |
| 496 | if (!band->plane && !band->band_num && (ctx->frame_flags & 8)) { |
| 497 | mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, |
| 498 | IVI_VLC_BITS, 1); |
| 499 | mb->q_delta = IVI_TOSIGNED(mb->q_delta); |
| 500 | } |
| 501 | |
| 502 | mb->mv_x = mb->mv_y = 0; /* no motion vector coded */ |
| 503 | if (band->inherit_mv && ref_mb){ |
| 504 | /* motion vector inheritance */ |
| 505 | if (mv_scale) { |
| 506 | mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale); |
| 507 | mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale); |
| 508 | } else { |
| 509 | mb->mv_x = ref_mb->mv_x; |
| 510 | mb->mv_y = ref_mb->mv_y; |
| 511 | } |
| 512 | } |
| 513 | } else { |
| 514 | if (band->inherit_mv && ref_mb) { |
| 515 | mb->type = ref_mb->type; /* copy mb_type from corresponding reference mb */ |
| 516 | } else if (ctx->frame_type == FRAMETYPE_INTRA) { |
| 517 | mb->type = 0; /* mb_type is always INTRA for intra-frames */ |
| 518 | } else { |
| 519 | mb->type = get_bits1(&ctx->gb); |
| 520 | } |
| 521 | |
| 522 | blks_per_mb = band->mb_size != band->blk_size ? 4 : 1; |
| 523 | mb->cbp = get_bits(&ctx->gb, blks_per_mb); |
| 524 | |
| 525 | mb->q_delta = 0; |
| 526 | if (band->qdelta_present) { |
| 527 | if (band->inherit_qdelta) { |
| 528 | if (ref_mb) mb->q_delta = ref_mb->q_delta; |
| 529 | } else if (mb->cbp || (!band->plane && !band->band_num && |
| 530 | (ctx->frame_flags & 8))) { |
| 531 | mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, |
| 532 | IVI_VLC_BITS, 1); |
| 533 | mb->q_delta = IVI_TOSIGNED(mb->q_delta); |
| 534 | } |
| 535 | } |
| 536 | |
| 537 | if (!mb->type) { |
| 538 | mb->mv_x = mb->mv_y = 0; /* there is no motion vector in intra-macroblocks */ |
| 539 | } else { |
| 540 | if (band->inherit_mv && ref_mb){ |
| 541 | /* motion vector inheritance */ |
| 542 | if (mv_scale) { |
| 543 | mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale); |
| 544 | mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale); |
| 545 | } else { |
| 546 | mb->mv_x = ref_mb->mv_x; |
| 547 | mb->mv_y = ref_mb->mv_y; |
| 548 | } |
| 549 | } else { |
| 550 | /* decode motion vector deltas */ |
| 551 | mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, |
| 552 | IVI_VLC_BITS, 1); |
| 553 | mv_y += IVI_TOSIGNED(mv_delta); |
| 554 | mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, |
| 555 | IVI_VLC_BITS, 1); |
| 556 | mv_x += IVI_TOSIGNED(mv_delta); |
| 557 | mb->mv_x = mv_x; |
| 558 | mb->mv_y = mv_y; |
| 559 | } |
| 560 | } |
| 561 | } |
| 562 | |
| 563 | s= band->is_halfpel; |
| 564 | if (mb->type) |
| 565 | if ( x + (mb->mv_x >>s) + (y+ (mb->mv_y >>s))*band->pitch < 0 || |
| 566 | x + ((mb->mv_x+s)>>s) + band->mb_size - 1 |
| 567 | + (y+band->mb_size - 1 +((mb->mv_y+s)>>s))*band->pitch > band->bufsize - 1) { |
| 568 | av_log(avctx, AV_LOG_ERROR, "motion vector %d %d outside reference\n", x*s + mb->mv_x, y*s + mb->mv_y); |
| 569 | return AVERROR_INVALIDDATA; |
| 570 | } |
| 571 | |
| 572 | mb++; |
| 573 | if (ref_mb) |
| 574 | ref_mb++; |
| 575 | mb_offset += band->mb_size; |
| 576 | } |
| 577 | |
| 578 | offs += row_offset; |
| 579 | } |
| 580 | |
| 581 | align_get_bits(&ctx->gb); |
| 582 | |
| 583 | return 0; |
| 584 | } |
| 585 | |
| 586 | |
| 587 | /** |
| 588 | * Switch buffers. |
| 589 | * |
| 590 | * @param[in,out] ctx ptr to the decoder context |
| 591 | */ |
| 592 | static void switch_buffers(IVI45DecContext *ctx) |
| 593 | { |
| 594 | switch (ctx->prev_frame_type) { |
| 595 | case FRAMETYPE_INTRA: |
| 596 | case FRAMETYPE_INTER: |
| 597 | ctx->buf_switch ^= 1; |
| 598 | ctx->dst_buf = ctx->buf_switch; |
| 599 | ctx->ref_buf = ctx->buf_switch ^ 1; |
| 600 | break; |
| 601 | case FRAMETYPE_INTER_SCAL: |
| 602 | if (!ctx->inter_scal) { |
| 603 | ctx->ref2_buf = 2; |
| 604 | ctx->inter_scal = 1; |
| 605 | } |
| 606 | FFSWAP(int, ctx->dst_buf, ctx->ref2_buf); |
| 607 | ctx->ref_buf = ctx->ref2_buf; |
| 608 | break; |
| 609 | case FRAMETYPE_INTER_NOREF: |
| 610 | break; |
| 611 | } |
| 612 | |
| 613 | switch (ctx->frame_type) { |
| 614 | case FRAMETYPE_INTRA: |
| 615 | ctx->buf_switch = 0; |
| 616 | /* FALLTHROUGH */ |
| 617 | case FRAMETYPE_INTER: |
| 618 | ctx->inter_scal = 0; |
| 619 | ctx->dst_buf = ctx->buf_switch; |
| 620 | ctx->ref_buf = ctx->buf_switch ^ 1; |
| 621 | break; |
| 622 | case FRAMETYPE_INTER_SCAL: |
| 623 | case FRAMETYPE_INTER_NOREF: |
| 624 | case FRAMETYPE_NULL: |
| 625 | break; |
| 626 | } |
| 627 | } |
| 628 | |
| 629 | |
| 630 | static int is_nonnull_frame(IVI45DecContext *ctx) |
| 631 | { |
| 632 | return ctx->frame_type != FRAMETYPE_NULL; |
| 633 | } |
| 634 | |
| 635 | |
| 636 | /** |
| 637 | * Initialize Indeo5 decoder. |
| 638 | */ |
| 639 | static av_cold int decode_init(AVCodecContext *avctx) |
| 640 | { |
| 641 | IVI45DecContext *ctx = avctx->priv_data; |
| 642 | int result; |
| 643 | |
| 644 | ff_ivi_init_static_vlc(); |
| 645 | |
| 646 | /* copy rvmap tables in our context so we can apply changes to them */ |
| 647 | memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs)); |
| 648 | |
| 649 | /* set the initial picture layout according to the basic profile: |
| 650 | there is only one band per plane (no scalability), only one tile (no local decoding) |
| 651 | and picture format = YVU9 */ |
| 652 | ctx->pic_conf.pic_width = avctx->width; |
| 653 | ctx->pic_conf.pic_height = avctx->height; |
| 654 | ctx->pic_conf.chroma_width = (avctx->width + 3) >> 2; |
| 655 | ctx->pic_conf.chroma_height = (avctx->height + 3) >> 2; |
| 656 | ctx->pic_conf.tile_width = avctx->width; |
| 657 | ctx->pic_conf.tile_height = avctx->height; |
| 658 | ctx->pic_conf.luma_bands = ctx->pic_conf.chroma_bands = 1; |
| 659 | |
| 660 | result = ff_ivi_init_planes(ctx->planes, &ctx->pic_conf, 0); |
| 661 | if (result) { |
| 662 | av_log(avctx, AV_LOG_ERROR, "Couldn't allocate color planes!\n"); |
| 663 | return AVERROR_INVALIDDATA; |
| 664 | } |
| 665 | |
| 666 | ctx->buf_switch = 0; |
| 667 | ctx->inter_scal = 0; |
| 668 | |
| 669 | ctx->decode_pic_hdr = decode_pic_hdr; |
| 670 | ctx->decode_band_hdr = decode_band_hdr; |
| 671 | ctx->decode_mb_info = decode_mb_info; |
| 672 | ctx->switch_buffers = switch_buffers; |
| 673 | ctx->is_nonnull_frame = is_nonnull_frame; |
| 674 | |
| 675 | ctx->is_indeo4 = 0; |
| 676 | |
| 677 | avctx->pix_fmt = AV_PIX_FMT_YUV410P; |
| 678 | |
| 679 | return 0; |
| 680 | } |
| 681 | |
| 682 | AVCodec ff_indeo5_decoder = { |
| 683 | .name = "indeo5", |
| 684 | .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"), |
| 685 | .type = AVMEDIA_TYPE_VIDEO, |
| 686 | .id = AV_CODEC_ID_INDEO5, |
| 687 | .priv_data_size = sizeof(IVI45DecContext), |
| 688 | .init = decode_init, |
| 689 | .close = ff_ivi_decode_close, |
| 690 | .decode = ff_ivi_decode_frame, |
| 691 | .capabilities = CODEC_CAP_DR1, |
| 692 | }; |