| 1 | /* |
| 2 | * Indeo Video Interactive v4 compatible decoder |
| 3 | * Copyright (c) 2009-2011 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 4 decoder |
| 25 | * |
| 26 | * Indeo 4 data is usually transported within .avi or .mov files. |
| 27 | * Known FOURCCs: 'IV41' |
| 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 "indeo4data.h" |
| 36 | |
| 37 | #define IVI4_PIC_SIZE_ESC 7 |
| 38 | |
| 39 | |
| 40 | static const struct { |
| 41 | InvTransformPtr *inv_trans; |
| 42 | DCTransformPtr *dc_trans; |
| 43 | int is_2d_trans; |
| 44 | } transforms[18] = { |
| 45 | { ff_ivi_inverse_haar_8x8, ff_ivi_dc_haar_2d, 1 }, |
| 46 | { ff_ivi_row_haar8, ff_ivi_dc_haar_2d, 0 }, |
| 47 | { ff_ivi_col_haar8, ff_ivi_dc_haar_2d, 0 }, |
| 48 | { ff_ivi_put_pixels_8x8, ff_ivi_put_dc_pixel_8x8, 1 }, |
| 49 | { ff_ivi_inverse_slant_8x8, ff_ivi_dc_slant_2d, 1 }, |
| 50 | { ff_ivi_row_slant8, ff_ivi_dc_row_slant, 1 }, |
| 51 | { ff_ivi_col_slant8, ff_ivi_dc_col_slant, 1 }, |
| 52 | { NULL, NULL, 0 }, /* inverse DCT 8x8 */ |
| 53 | { NULL, NULL, 0 }, /* inverse DCT 8x1 */ |
| 54 | { NULL, NULL, 0 }, /* inverse DCT 1x8 */ |
| 55 | { ff_ivi_inverse_haar_4x4, ff_ivi_dc_haar_2d, 1 }, |
| 56 | { ff_ivi_inverse_slant_4x4, ff_ivi_dc_slant_2d, 1 }, |
| 57 | { NULL, NULL, 0 }, /* no transform 4x4 */ |
| 58 | { ff_ivi_row_haar4, ff_ivi_dc_haar_2d, 0 }, |
| 59 | { ff_ivi_col_haar4, ff_ivi_dc_haar_2d, 0 }, |
| 60 | { ff_ivi_row_slant4, ff_ivi_dc_row_slant, 0 }, |
| 61 | { ff_ivi_col_slant4, ff_ivi_dc_col_slant, 0 }, |
| 62 | { NULL, NULL, 0 }, /* inverse DCT 4x4 */ |
| 63 | }; |
| 64 | |
| 65 | /** |
| 66 | * Decode subdivision of a plane. |
| 67 | * This is a simplified version that checks for two supported subdivisions: |
| 68 | * - 1 wavelet band per plane, size factor 1:1, code pattern: 3 |
| 69 | * - 4 wavelet bands per plane, size factor 1:4, code pattern: 2,3,3,3,3 |
| 70 | * Anything else is either unsupported or corrupt. |
| 71 | * |
| 72 | * @param[in,out] gb the GetBit context |
| 73 | * @return number of wavelet bands or 0 on error |
| 74 | */ |
| 75 | static int decode_plane_subdivision(GetBitContext *gb) |
| 76 | { |
| 77 | int i; |
| 78 | |
| 79 | switch (get_bits(gb, 2)) { |
| 80 | case 3: |
| 81 | return 1; |
| 82 | case 2: |
| 83 | for (i = 0; i < 4; i++) |
| 84 | if (get_bits(gb, 2) != 3) |
| 85 | return 0; |
| 86 | return 4; |
| 87 | default: |
| 88 | return 0; |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | static inline int scale_tile_size(int def_size, int size_factor) |
| 93 | { |
| 94 | return size_factor == 15 ? def_size : (size_factor + 1) << 5; |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | * Decode Indeo 4 picture header. |
| 99 | * |
| 100 | * @param[in,out] ctx pointer to the decoder context |
| 101 | * @param[in] avctx pointer to the AVCodecContext |
| 102 | * @return result code: 0 = OK, negative number = error |
| 103 | */ |
| 104 | static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx) |
| 105 | { |
| 106 | int pic_size_indx, i, p; |
| 107 | IVIPicConfig pic_conf; |
| 108 | |
| 109 | if (get_bits(&ctx->gb, 18) != 0x3FFF8) { |
| 110 | av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n"); |
| 111 | return AVERROR_INVALIDDATA; |
| 112 | } |
| 113 | |
| 114 | ctx->prev_frame_type = ctx->frame_type; |
| 115 | ctx->frame_type = get_bits(&ctx->gb, 3); |
| 116 | if (ctx->frame_type == 7) { |
| 117 | av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d\n", ctx->frame_type); |
| 118 | return AVERROR_INVALIDDATA; |
| 119 | } |
| 120 | |
| 121 | #if IVI4_STREAM_ANALYSER |
| 122 | if (ctx->frame_type == IVI4_FRAMETYPE_BIDIR) |
| 123 | ctx->has_b_frames = 1; |
| 124 | #endif |
| 125 | |
| 126 | ctx->transp_status = get_bits1(&ctx->gb); |
| 127 | #if IVI4_STREAM_ANALYSER |
| 128 | if (ctx->transp_status) { |
| 129 | ctx->has_transp = 1; |
| 130 | } |
| 131 | #endif |
| 132 | |
| 133 | /* unknown bit: Mac decoder ignores this bit, XANIM returns error */ |
| 134 | if (get_bits1(&ctx->gb)) { |
| 135 | av_log(avctx, AV_LOG_ERROR, "Sync bit is set!\n"); |
| 136 | return AVERROR_INVALIDDATA; |
| 137 | } |
| 138 | |
| 139 | ctx->data_size = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 24) : 0; |
| 140 | |
| 141 | /* null frames don't contain anything else so we just return */ |
| 142 | if (ctx->frame_type >= IVI4_FRAMETYPE_NULL_FIRST) { |
| 143 | av_dlog(avctx, "Null frame encountered!\n"); |
| 144 | return 0; |
| 145 | } |
| 146 | |
| 147 | /* Check key lock status. If enabled - ignore lock word. */ |
| 148 | /* Usually we have to prompt the user for the password, but */ |
| 149 | /* we don't do that because Indeo 4 videos can be decoded anyway */ |
| 150 | if (get_bits1(&ctx->gb)) { |
| 151 | skip_bits_long(&ctx->gb, 32); |
| 152 | av_dlog(avctx, "Password-protected clip!\n"); |
| 153 | } |
| 154 | |
| 155 | pic_size_indx = get_bits(&ctx->gb, 3); |
| 156 | if (pic_size_indx == IVI4_PIC_SIZE_ESC) { |
| 157 | pic_conf.pic_height = get_bits(&ctx->gb, 16); |
| 158 | pic_conf.pic_width = get_bits(&ctx->gb, 16); |
| 159 | } else { |
| 160 | pic_conf.pic_height = ivi4_common_pic_sizes[pic_size_indx * 2 + 1]; |
| 161 | pic_conf.pic_width = ivi4_common_pic_sizes[pic_size_indx * 2 ]; |
| 162 | } |
| 163 | |
| 164 | /* Decode tile dimensions. */ |
| 165 | if (get_bits1(&ctx->gb)) { |
| 166 | pic_conf.tile_height = scale_tile_size(pic_conf.pic_height, get_bits(&ctx->gb, 4)); |
| 167 | pic_conf.tile_width = scale_tile_size(pic_conf.pic_width, get_bits(&ctx->gb, 4)); |
| 168 | #if IVI4_STREAM_ANALYSER |
| 169 | ctx->uses_tiling = 1; |
| 170 | #endif |
| 171 | } else { |
| 172 | pic_conf.tile_height = pic_conf.pic_height; |
| 173 | pic_conf.tile_width = pic_conf.pic_width; |
| 174 | } |
| 175 | |
| 176 | /* Decode chroma subsampling. We support only 4:4 aka YVU9. */ |
| 177 | if (get_bits(&ctx->gb, 2)) { |
| 178 | av_log(avctx, AV_LOG_ERROR, "Only YVU9 picture format is supported!\n"); |
| 179 | return AVERROR_INVALIDDATA; |
| 180 | } |
| 181 | pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2; |
| 182 | pic_conf.chroma_width = (pic_conf.pic_width + 3) >> 2; |
| 183 | |
| 184 | /* decode subdivision of the planes */ |
| 185 | pic_conf.luma_bands = decode_plane_subdivision(&ctx->gb); |
| 186 | pic_conf.chroma_bands = 0; |
| 187 | if (pic_conf.luma_bands) |
| 188 | pic_conf.chroma_bands = decode_plane_subdivision(&ctx->gb); |
| 189 | ctx->is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1; |
| 190 | if (ctx->is_scalable && (pic_conf.luma_bands != 4 || pic_conf.chroma_bands != 1)) { |
| 191 | av_log(avctx, AV_LOG_ERROR, "Scalability: unsupported subdivision! Luma bands: %d, chroma bands: %d\n", |
| 192 | pic_conf.luma_bands, pic_conf.chroma_bands); |
| 193 | return AVERROR_INVALIDDATA; |
| 194 | } |
| 195 | |
| 196 | /* check if picture layout was changed and reallocate buffers */ |
| 197 | if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf)) { |
| 198 | if (ff_ivi_init_planes(ctx->planes, &pic_conf, 1)) { |
| 199 | av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n"); |
| 200 | ctx->pic_conf.luma_bands = 0; |
| 201 | return AVERROR(ENOMEM); |
| 202 | } |
| 203 | |
| 204 | ctx->pic_conf = pic_conf; |
| 205 | |
| 206 | /* set default macroblock/block dimensions */ |
| 207 | for (p = 0; p <= 2; p++) { |
| 208 | for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) { |
| 209 | ctx->planes[p].bands[i].mb_size = !p ? (!ctx->is_scalable ? 16 : 8) : 4; |
| 210 | ctx->planes[p].bands[i].blk_size = !p ? 8 : 4; |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | if (ff_ivi_init_tiles(ctx->planes, ctx->pic_conf.tile_width, |
| 215 | ctx->pic_conf.tile_height)) { |
| 216 | av_log(avctx, AV_LOG_ERROR, |
| 217 | "Couldn't reallocate internal structures!\n"); |
| 218 | return AVERROR(ENOMEM); |
| 219 | } |
| 220 | } |
| 221 | |
| 222 | ctx->frame_num = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 20) : 0; |
| 223 | |
| 224 | /* skip decTimeEst field if present */ |
| 225 | if (get_bits1(&ctx->gb)) |
| 226 | skip_bits(&ctx->gb, 8); |
| 227 | |
| 228 | /* decode macroblock and block huffman codebooks */ |
| 229 | if (ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_MB_HUFF, &ctx->mb_vlc, avctx) || |
| 230 | ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_BLK_HUFF, &ctx->blk_vlc, avctx)) |
| 231 | return AVERROR_INVALIDDATA; |
| 232 | |
| 233 | ctx->rvmap_sel = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 8; |
| 234 | |
| 235 | ctx->in_imf = get_bits1(&ctx->gb); |
| 236 | ctx->in_q = get_bits1(&ctx->gb); |
| 237 | |
| 238 | ctx->pic_glob_quant = get_bits(&ctx->gb, 5); |
| 239 | |
| 240 | /* TODO: ignore this parameter if unused */ |
| 241 | ctx->unknown1 = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 0; |
| 242 | |
| 243 | ctx->checksum = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 16) : 0; |
| 244 | |
| 245 | /* skip picture header extension if any */ |
| 246 | while (get_bits1(&ctx->gb)) { |
| 247 | av_dlog(avctx, "Pic hdr extension encountered!\n"); |
| 248 | skip_bits(&ctx->gb, 8); |
| 249 | } |
| 250 | |
| 251 | if (get_bits1(&ctx->gb)) { |
| 252 | av_log(avctx, AV_LOG_ERROR, "Bad blocks bits encountered!\n"); |
| 253 | } |
| 254 | |
| 255 | align_get_bits(&ctx->gb); |
| 256 | |
| 257 | return 0; |
| 258 | } |
| 259 | |
| 260 | |
| 261 | /** |
| 262 | * Decode Indeo 4 band header. |
| 263 | * |
| 264 | * @param[in,out] ctx pointer to the decoder context |
| 265 | * @param[in,out] band pointer to the band descriptor |
| 266 | * @param[in] avctx pointer to the AVCodecContext |
| 267 | * @return result code: 0 = OK, negative number = error |
| 268 | */ |
| 269 | static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band, |
| 270 | AVCodecContext *avctx) |
| 271 | { |
| 272 | int plane, band_num, indx, transform_id, scan_indx; |
| 273 | int i; |
| 274 | int quant_mat; |
| 275 | |
| 276 | plane = get_bits(&ctx->gb, 2); |
| 277 | band_num = get_bits(&ctx->gb, 4); |
| 278 | if (band->plane != plane || band->band_num != band_num) { |
| 279 | av_log(avctx, AV_LOG_ERROR, "Invalid band header sequence!\n"); |
| 280 | return AVERROR_INVALIDDATA; |
| 281 | } |
| 282 | |
| 283 | band->is_empty = get_bits1(&ctx->gb); |
| 284 | if (!band->is_empty) { |
| 285 | int old_blk_size = band->blk_size; |
| 286 | /* skip header size |
| 287 | * If header size is not given, header size is 4 bytes. */ |
| 288 | if (get_bits1(&ctx->gb)) |
| 289 | skip_bits(&ctx->gb, 16); |
| 290 | |
| 291 | band->is_halfpel = get_bits(&ctx->gb, 2); |
| 292 | if (band->is_halfpel >= 2) { |
| 293 | av_log(avctx, AV_LOG_ERROR, "Invalid/unsupported mv resolution: %d!\n", |
| 294 | band->is_halfpel); |
| 295 | return AVERROR_INVALIDDATA; |
| 296 | } |
| 297 | #if IVI4_STREAM_ANALYSER |
| 298 | if (!band->is_halfpel) |
| 299 | ctx->uses_fullpel = 1; |
| 300 | #endif |
| 301 | |
| 302 | band->checksum_present = get_bits1(&ctx->gb); |
| 303 | if (band->checksum_present) |
| 304 | band->checksum = get_bits(&ctx->gb, 16); |
| 305 | |
| 306 | indx = get_bits(&ctx->gb, 2); |
| 307 | if (indx == 3) { |
| 308 | av_log(avctx, AV_LOG_ERROR, "Invalid block size!\n"); |
| 309 | return AVERROR_INVALIDDATA; |
| 310 | } |
| 311 | band->mb_size = 16 >> indx; |
| 312 | band->blk_size = 8 >> (indx >> 1); |
| 313 | |
| 314 | band->inherit_mv = get_bits1(&ctx->gb); |
| 315 | band->inherit_qdelta = get_bits1(&ctx->gb); |
| 316 | |
| 317 | band->glob_quant = get_bits(&ctx->gb, 5); |
| 318 | |
| 319 | if (!get_bits1(&ctx->gb) || ctx->frame_type == IVI4_FRAMETYPE_INTRA) { |
| 320 | transform_id = get_bits(&ctx->gb, 5); |
| 321 | if (transform_id >= FF_ARRAY_ELEMS(transforms) || |
| 322 | !transforms[transform_id].inv_trans) { |
| 323 | avpriv_request_sample(avctx, "Transform %d", transform_id); |
| 324 | return AVERROR_PATCHWELCOME; |
| 325 | } |
| 326 | if ((transform_id >= 7 && transform_id <= 9) || |
| 327 | transform_id == 17) { |
| 328 | avpriv_request_sample(avctx, "DCT transform"); |
| 329 | return AVERROR_PATCHWELCOME; |
| 330 | } |
| 331 | |
| 332 | if (transform_id < 10 && band->blk_size < 8) { |
| 333 | av_log(avctx, AV_LOG_ERROR, "wrong transform size!\n"); |
| 334 | return AVERROR_INVALIDDATA; |
| 335 | } |
| 336 | #if IVI4_STREAM_ANALYSER |
| 337 | if ((transform_id >= 0 && transform_id <= 2) || transform_id == 10) |
| 338 | ctx->uses_haar = 1; |
| 339 | #endif |
| 340 | |
| 341 | band->inv_transform = transforms[transform_id].inv_trans; |
| 342 | band->dc_transform = transforms[transform_id].dc_trans; |
| 343 | band->is_2d_trans = transforms[transform_id].is_2d_trans; |
| 344 | |
| 345 | if (transform_id < 10) |
| 346 | band->transform_size = 8; |
| 347 | else |
| 348 | band->transform_size = 4; |
| 349 | |
| 350 | if (band->blk_size != band->transform_size) { |
| 351 | av_log(avctx, AV_LOG_ERROR, "transform and block size mismatch (%d != %d)\n", band->transform_size, band->blk_size); |
| 352 | return AVERROR_INVALIDDATA; |
| 353 | } |
| 354 | |
| 355 | scan_indx = get_bits(&ctx->gb, 4); |
| 356 | if (scan_indx == 15) { |
| 357 | av_log(avctx, AV_LOG_ERROR, "Custom scan pattern encountered!\n"); |
| 358 | return AVERROR_INVALIDDATA; |
| 359 | } |
| 360 | if (scan_indx > 4 && scan_indx < 10) { |
| 361 | if (band->blk_size != 4) { |
| 362 | av_log(avctx, AV_LOG_ERROR, "mismatching scan table!\n"); |
| 363 | return AVERROR_INVALIDDATA; |
| 364 | } |
| 365 | } else if (band->blk_size != 8) { |
| 366 | av_log(avctx, AV_LOG_ERROR, "mismatching scan table!\n"); |
| 367 | return AVERROR_INVALIDDATA; |
| 368 | } |
| 369 | |
| 370 | band->scan = scan_index_to_tab[scan_indx]; |
| 371 | band->scan_size = band->blk_size; |
| 372 | |
| 373 | quant_mat = get_bits(&ctx->gb, 5); |
| 374 | if (quant_mat == 31) { |
| 375 | av_log(avctx, AV_LOG_ERROR, "Custom quant matrix encountered!\n"); |
| 376 | return AVERROR_INVALIDDATA; |
| 377 | } |
| 378 | if (quant_mat >= FF_ARRAY_ELEMS(quant_index_to_tab)) { |
| 379 | avpriv_request_sample(avctx, "Quantization matrix %d", |
| 380 | quant_mat); |
| 381 | return AVERROR_INVALIDDATA; |
| 382 | } |
| 383 | band->quant_mat = quant_mat; |
| 384 | } else { |
| 385 | if (old_blk_size != band->blk_size) { |
| 386 | av_log(avctx, AV_LOG_ERROR, |
| 387 | "The band block size does not match the configuration " |
| 388 | "inherited\n"); |
| 389 | return AVERROR_INVALIDDATA; |
| 390 | } |
| 391 | } |
| 392 | if (quant_index_to_tab[band->quant_mat] > 4 && band->blk_size == 4) { |
| 393 | av_log(avctx, AV_LOG_ERROR, "Invalid quant matrix for 4x4 block encountered!\n"); |
| 394 | band->quant_mat = 0; |
| 395 | return AVERROR_INVALIDDATA; |
| 396 | } |
| 397 | if (band->scan_size != band->blk_size) { |
| 398 | av_log(avctx, AV_LOG_ERROR, "mismatching scan table!\n"); |
| 399 | return AVERROR_INVALIDDATA; |
| 400 | } |
| 401 | if (band->transform_size == 8 && band->blk_size < 8) { |
| 402 | av_log(avctx, AV_LOG_ERROR, "mismatching transform_size!\n"); |
| 403 | return AVERROR_INVALIDDATA; |
| 404 | } |
| 405 | |
| 406 | /* decode block huffman codebook */ |
| 407 | if (!get_bits1(&ctx->gb)) |
| 408 | band->blk_vlc.tab = ctx->blk_vlc.tab; |
| 409 | else |
| 410 | if (ff_ivi_dec_huff_desc(&ctx->gb, 1, IVI_BLK_HUFF, |
| 411 | &band->blk_vlc, avctx)) |
| 412 | return AVERROR_INVALIDDATA; |
| 413 | |
| 414 | /* select appropriate rvmap table for this band */ |
| 415 | band->rvmap_sel = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 8; |
| 416 | |
| 417 | /* decode rvmap probability corrections if any */ |
| 418 | band->num_corr = 0; /* there is no corrections */ |
| 419 | if (get_bits1(&ctx->gb)) { |
| 420 | band->num_corr = get_bits(&ctx->gb, 8); /* get number of correction pairs */ |
| 421 | if (band->num_corr > 61) { |
| 422 | av_log(avctx, AV_LOG_ERROR, "Too many corrections: %d\n", |
| 423 | band->num_corr); |
| 424 | return AVERROR_INVALIDDATA; |
| 425 | } |
| 426 | |
| 427 | /* read correction pairs */ |
| 428 | for (i = 0; i < band->num_corr * 2; i++) |
| 429 | band->corr[i] = get_bits(&ctx->gb, 8); |
| 430 | } |
| 431 | } |
| 432 | |
| 433 | if (band->blk_size == 8) { |
| 434 | band->intra_base = &ivi4_quant_8x8_intra[quant_index_to_tab[band->quant_mat]][0]; |
| 435 | band->inter_base = &ivi4_quant_8x8_inter[quant_index_to_tab[band->quant_mat]][0]; |
| 436 | } else { |
| 437 | band->intra_base = &ivi4_quant_4x4_intra[quant_index_to_tab[band->quant_mat]][0]; |
| 438 | band->inter_base = &ivi4_quant_4x4_inter[quant_index_to_tab[band->quant_mat]][0]; |
| 439 | } |
| 440 | |
| 441 | /* Indeo 4 doesn't use scale tables */ |
| 442 | band->intra_scale = NULL; |
| 443 | band->inter_scale = NULL; |
| 444 | |
| 445 | align_get_bits(&ctx->gb); |
| 446 | |
| 447 | if (!band->scan) { |
| 448 | av_log(avctx, AV_LOG_ERROR, "band->scan not set\n"); |
| 449 | return AVERROR_INVALIDDATA; |
| 450 | } |
| 451 | |
| 452 | return 0; |
| 453 | } |
| 454 | |
| 455 | |
| 456 | /** |
| 457 | * Decode information (block type, cbp, quant delta, motion vector) |
| 458 | * for all macroblocks in the current tile. |
| 459 | * |
| 460 | * @param[in,out] ctx pointer to the decoder context |
| 461 | * @param[in,out] band pointer to the band descriptor |
| 462 | * @param[in,out] tile pointer to the tile descriptor |
| 463 | * @param[in] avctx pointer to the AVCodecContext |
| 464 | * @return result code: 0 = OK, negative number = error |
| 465 | */ |
| 466 | static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band, |
| 467 | IVITile *tile, AVCodecContext *avctx) |
| 468 | { |
| 469 | int x, y, mv_x, mv_y, mv_delta, offs, mb_offset, blks_per_mb, |
| 470 | mv_scale, mb_type_bits, s; |
| 471 | IVIMbInfo *mb, *ref_mb; |
| 472 | int row_offset = band->mb_size * band->pitch; |
| 473 | |
| 474 | mb = tile->mbs; |
| 475 | ref_mb = tile->ref_mbs; |
| 476 | offs = tile->ypos * band->pitch + tile->xpos; |
| 477 | |
| 478 | blks_per_mb = band->mb_size != band->blk_size ? 4 : 1; |
| 479 | mb_type_bits = ctx->frame_type == IVI4_FRAMETYPE_BIDIR ? 2 : 1; |
| 480 | |
| 481 | /* scale factor for motion vectors */ |
| 482 | mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3); |
| 483 | mv_x = mv_y = 0; |
| 484 | |
| 485 | if (((tile->width + band->mb_size-1)/band->mb_size) * ((tile->height + band->mb_size-1)/band->mb_size) != tile->num_MBs) { |
| 486 | av_log(avctx, AV_LOG_ERROR, "num_MBs mismatch %d %d %d %d\n", tile->width, tile->height, band->mb_size, tile->num_MBs); |
| 487 | return -1; |
| 488 | } |
| 489 | |
| 490 | for (y = tile->ypos; y < tile->ypos + tile->height; y += band->mb_size) { |
| 491 | mb_offset = offs; |
| 492 | |
| 493 | for (x = tile->xpos; x < tile->xpos + tile->width; x += band->mb_size) { |
| 494 | mb->xpos = x; |
| 495 | mb->ypos = y; |
| 496 | mb->buf_offs = mb_offset; |
| 497 | mb->b_mv_x = |
| 498 | mb->b_mv_y = 0; |
| 499 | |
| 500 | if (get_bits1(&ctx->gb)) { |
| 501 | if (ctx->frame_type == IVI4_FRAMETYPE_INTRA) { |
| 502 | av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n"); |
| 503 | return AVERROR_INVALIDDATA; |
| 504 | } |
| 505 | mb->type = 1; /* empty macroblocks are always INTER */ |
| 506 | mb->cbp = 0; /* all blocks are empty */ |
| 507 | |
| 508 | mb->q_delta = 0; |
| 509 | if (!band->plane && !band->band_num && ctx->in_q) { |
| 510 | mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, |
| 511 | IVI_VLC_BITS, 1); |
| 512 | mb->q_delta = IVI_TOSIGNED(mb->q_delta); |
| 513 | } |
| 514 | |
| 515 | mb->mv_x = mb->mv_y = 0; /* no motion vector coded */ |
| 516 | if (band->inherit_mv && ref_mb) { |
| 517 | /* motion vector inheritance */ |
| 518 | if (mv_scale) { |
| 519 | mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale); |
| 520 | mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale); |
| 521 | } else { |
| 522 | mb->mv_x = ref_mb->mv_x; |
| 523 | mb->mv_y = ref_mb->mv_y; |
| 524 | } |
| 525 | } |
| 526 | } else { |
| 527 | if (band->inherit_mv) { |
| 528 | /* copy mb_type from corresponding reference mb */ |
| 529 | if (!ref_mb) { |
| 530 | av_log(avctx, AV_LOG_ERROR, "ref_mb unavailable\n"); |
| 531 | return AVERROR_INVALIDDATA; |
| 532 | } |
| 533 | mb->type = ref_mb->type; |
| 534 | } else if (ctx->frame_type == IVI4_FRAMETYPE_INTRA || |
| 535 | ctx->frame_type == IVI4_FRAMETYPE_INTRA1) { |
| 536 | mb->type = 0; /* mb_type is always INTRA for intra-frames */ |
| 537 | } else { |
| 538 | mb->type = get_bits(&ctx->gb, mb_type_bits); |
| 539 | } |
| 540 | |
| 541 | mb->cbp = get_bits(&ctx->gb, blks_per_mb); |
| 542 | |
| 543 | mb->q_delta = 0; |
| 544 | if (band->inherit_qdelta) { |
| 545 | if (ref_mb) mb->q_delta = ref_mb->q_delta; |
| 546 | } else if (mb->cbp || (!band->plane && !band->band_num && |
| 547 | ctx->in_q)) { |
| 548 | mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, |
| 549 | IVI_VLC_BITS, 1); |
| 550 | mb->q_delta = IVI_TOSIGNED(mb->q_delta); |
| 551 | } |
| 552 | |
| 553 | if (!mb->type) { |
| 554 | mb->mv_x = mb->mv_y = 0; /* there is no motion vector in intra-macroblocks */ |
| 555 | } else { |
| 556 | if (band->inherit_mv) { |
| 557 | if (ref_mb) |
| 558 | /* motion vector inheritance */ |
| 559 | if (mv_scale) { |
| 560 | mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale); |
| 561 | mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale); |
| 562 | } else { |
| 563 | mb->mv_x = ref_mb->mv_x; |
| 564 | mb->mv_y = ref_mb->mv_y; |
| 565 | } |
| 566 | } else { |
| 567 | /* decode motion vector deltas */ |
| 568 | mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, |
| 569 | IVI_VLC_BITS, 1); |
| 570 | mv_y += IVI_TOSIGNED(mv_delta); |
| 571 | mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, |
| 572 | IVI_VLC_BITS, 1); |
| 573 | mv_x += IVI_TOSIGNED(mv_delta); |
| 574 | mb->mv_x = mv_x; |
| 575 | mb->mv_y = mv_y; |
| 576 | if (mb->type == 3) { |
| 577 | mv_delta = get_vlc2(&ctx->gb, |
| 578 | ctx->mb_vlc.tab->table, |
| 579 | IVI_VLC_BITS, 1); |
| 580 | mv_y += IVI_TOSIGNED(mv_delta); |
| 581 | mv_delta = get_vlc2(&ctx->gb, |
| 582 | ctx->mb_vlc.tab->table, |
| 583 | IVI_VLC_BITS, 1); |
| 584 | mv_x += IVI_TOSIGNED(mv_delta); |
| 585 | mb->b_mv_x = -mv_x; |
| 586 | mb->b_mv_y = -mv_y; |
| 587 | } |
| 588 | } |
| 589 | if (mb->type == 2) { |
| 590 | mb->b_mv_x = -mb->mv_x; |
| 591 | mb->b_mv_y = -mb->mv_y; |
| 592 | mb->mv_x = 0; |
| 593 | mb->mv_y = 0; |
| 594 | } |
| 595 | } |
| 596 | } |
| 597 | |
| 598 | s= band->is_halfpel; |
| 599 | if (mb->type) |
| 600 | if ( x + (mb->mv_x >>s) + (y+ (mb->mv_y >>s))*band->pitch < 0 || |
| 601 | x + ((mb->mv_x+s)>>s) + band->mb_size - 1 |
| 602 | + (y+band->mb_size - 1 +((mb->mv_y+s)>>s))*band->pitch > band->bufsize -1) { |
| 603 | av_log(avctx, AV_LOG_ERROR, "motion vector %d %d outside reference\n", x*s + mb->mv_x, y*s + mb->mv_y); |
| 604 | return AVERROR_INVALIDDATA; |
| 605 | } |
| 606 | |
| 607 | mb++; |
| 608 | if (ref_mb) |
| 609 | ref_mb++; |
| 610 | mb_offset += band->mb_size; |
| 611 | } |
| 612 | |
| 613 | offs += row_offset; |
| 614 | } |
| 615 | |
| 616 | align_get_bits(&ctx->gb); |
| 617 | |
| 618 | return 0; |
| 619 | } |
| 620 | |
| 621 | |
| 622 | /** |
| 623 | * Rearrange decoding and reference buffers. |
| 624 | * |
| 625 | * @param[in,out] ctx pointer to the decoder context |
| 626 | */ |
| 627 | static void switch_buffers(IVI45DecContext *ctx) |
| 628 | { |
| 629 | int is_prev_ref = 0, is_ref = 0; |
| 630 | |
| 631 | switch (ctx->prev_frame_type) { |
| 632 | case IVI4_FRAMETYPE_INTRA: |
| 633 | case IVI4_FRAMETYPE_INTRA1: |
| 634 | case IVI4_FRAMETYPE_INTER: |
| 635 | is_prev_ref = 1; |
| 636 | break; |
| 637 | } |
| 638 | |
| 639 | switch (ctx->frame_type) { |
| 640 | case IVI4_FRAMETYPE_INTRA: |
| 641 | case IVI4_FRAMETYPE_INTRA1: |
| 642 | case IVI4_FRAMETYPE_INTER: |
| 643 | is_ref = 1; |
| 644 | break; |
| 645 | } |
| 646 | |
| 647 | if (is_prev_ref && is_ref) { |
| 648 | FFSWAP(int, ctx->dst_buf, ctx->ref_buf); |
| 649 | } else if (is_prev_ref) { |
| 650 | FFSWAP(int, ctx->ref_buf, ctx->b_ref_buf); |
| 651 | FFSWAP(int, ctx->dst_buf, ctx->ref_buf); |
| 652 | } |
| 653 | } |
| 654 | |
| 655 | |
| 656 | static int is_nonnull_frame(IVI45DecContext *ctx) |
| 657 | { |
| 658 | return ctx->frame_type < IVI4_FRAMETYPE_NULL_FIRST; |
| 659 | } |
| 660 | |
| 661 | |
| 662 | static av_cold int decode_init(AVCodecContext *avctx) |
| 663 | { |
| 664 | IVI45DecContext *ctx = avctx->priv_data; |
| 665 | |
| 666 | ff_ivi_init_static_vlc(); |
| 667 | |
| 668 | /* copy rvmap tables in our context so we can apply changes to them */ |
| 669 | memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs)); |
| 670 | |
| 671 | /* Force allocation of the internal buffers */ |
| 672 | /* during picture header decoding. */ |
| 673 | ctx->pic_conf.pic_width = 0; |
| 674 | ctx->pic_conf.pic_height = 0; |
| 675 | |
| 676 | avctx->pix_fmt = AV_PIX_FMT_YUV410P; |
| 677 | |
| 678 | ctx->decode_pic_hdr = decode_pic_hdr; |
| 679 | ctx->decode_band_hdr = decode_band_hdr; |
| 680 | ctx->decode_mb_info = decode_mb_info; |
| 681 | ctx->switch_buffers = switch_buffers; |
| 682 | ctx->is_nonnull_frame = is_nonnull_frame; |
| 683 | |
| 684 | ctx->is_indeo4 = 1; |
| 685 | |
| 686 | ctx->dst_buf = 0; |
| 687 | ctx->ref_buf = 1; |
| 688 | ctx->b_ref_buf = 3; /* buffer 2 is used for scalability mode */ |
| 689 | ctx->p_frame = av_frame_alloc(); |
| 690 | if (!ctx->p_frame) |
| 691 | return AVERROR(ENOMEM); |
| 692 | |
| 693 | return 0; |
| 694 | } |
| 695 | |
| 696 | |
| 697 | AVCodec ff_indeo4_decoder = { |
| 698 | .name = "indeo4", |
| 699 | .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 4"), |
| 700 | .type = AVMEDIA_TYPE_VIDEO, |
| 701 | .id = AV_CODEC_ID_INDEO4, |
| 702 | .priv_data_size = sizeof(IVI45DecContext), |
| 703 | .init = decode_init, |
| 704 | .close = ff_ivi_decode_close, |
| 705 | .decode = ff_ivi_decode_frame, |
| 706 | .capabilities = CODEC_CAP_DR1, |
| 707 | }; |