| 1 | /* |
| 2 | * Duck/ON2 TrueMotion 2 Decoder |
| 3 | * Copyright (c) 2005 Konstantin Shishkov |
| 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 | * Duck TrueMotion2 decoder. |
| 25 | */ |
| 26 | |
| 27 | #include <inttypes.h> |
| 28 | |
| 29 | #include "avcodec.h" |
| 30 | #include "bswapdsp.h" |
| 31 | #include "bytestream.h" |
| 32 | #include "get_bits.h" |
| 33 | #include "internal.h" |
| 34 | |
| 35 | #define TM2_ESCAPE 0x80000000 |
| 36 | #define TM2_DELTAS 64 |
| 37 | |
| 38 | /* Huffman-coded streams of different types of blocks */ |
| 39 | enum TM2_STREAMS { |
| 40 | TM2_C_HI = 0, |
| 41 | TM2_C_LO, |
| 42 | TM2_L_HI, |
| 43 | TM2_L_LO, |
| 44 | TM2_UPD, |
| 45 | TM2_MOT, |
| 46 | TM2_TYPE, |
| 47 | TM2_NUM_STREAMS |
| 48 | }; |
| 49 | |
| 50 | /* Block types */ |
| 51 | enum TM2_BLOCKS { |
| 52 | TM2_HI_RES = 0, |
| 53 | TM2_MED_RES, |
| 54 | TM2_LOW_RES, |
| 55 | TM2_NULL_RES, |
| 56 | TM2_UPDATE, |
| 57 | TM2_STILL, |
| 58 | TM2_MOTION |
| 59 | }; |
| 60 | |
| 61 | typedef struct TM2Context { |
| 62 | AVCodecContext *avctx; |
| 63 | AVFrame *pic; |
| 64 | |
| 65 | GetBitContext gb; |
| 66 | BswapDSPContext bdsp; |
| 67 | |
| 68 | uint8_t *buffer; |
| 69 | int buffer_size; |
| 70 | |
| 71 | /* TM2 streams */ |
| 72 | int *tokens[TM2_NUM_STREAMS]; |
| 73 | int tok_lens[TM2_NUM_STREAMS]; |
| 74 | int tok_ptrs[TM2_NUM_STREAMS]; |
| 75 | int deltas[TM2_NUM_STREAMS][TM2_DELTAS]; |
| 76 | /* for blocks decoding */ |
| 77 | int D[4]; |
| 78 | int CD[4]; |
| 79 | int *last; |
| 80 | int *clast; |
| 81 | |
| 82 | /* data for current and previous frame */ |
| 83 | int *Y1_base, *U1_base, *V1_base, *Y2_base, *U2_base, *V2_base; |
| 84 | int *Y1, *U1, *V1, *Y2, *U2, *V2; |
| 85 | int y_stride, uv_stride; |
| 86 | int cur; |
| 87 | } TM2Context; |
| 88 | |
| 89 | /** |
| 90 | * Huffman codes for each of streams |
| 91 | */ |
| 92 | typedef struct TM2Codes { |
| 93 | VLC vlc; ///< table for FFmpeg bitstream reader |
| 94 | int bits; |
| 95 | int *recode; ///< table for converting from code indexes to values |
| 96 | int length; |
| 97 | } TM2Codes; |
| 98 | |
| 99 | /** |
| 100 | * structure for gathering Huffman codes information |
| 101 | */ |
| 102 | typedef struct TM2Huff { |
| 103 | int val_bits; ///< length of literal |
| 104 | int max_bits; ///< maximum length of code |
| 105 | int min_bits; ///< minimum length of code |
| 106 | int nodes; ///< total number of nodes in tree |
| 107 | int num; ///< current number filled |
| 108 | int max_num; ///< total number of codes |
| 109 | int *nums; ///< literals |
| 110 | uint32_t *bits; ///< codes |
| 111 | int *lens; ///< codelengths |
| 112 | } TM2Huff; |
| 113 | |
| 114 | static int tm2_read_tree(TM2Context *ctx, uint32_t prefix, int length, TM2Huff *huff) |
| 115 | { |
| 116 | int ret; |
| 117 | if (length > huff->max_bits) { |
| 118 | av_log(ctx->avctx, AV_LOG_ERROR, "Tree exceeded its given depth (%i)\n", |
| 119 | huff->max_bits); |
| 120 | return AVERROR_INVALIDDATA; |
| 121 | } |
| 122 | |
| 123 | if (!get_bits1(&ctx->gb)) { /* literal */ |
| 124 | if (length == 0) { |
| 125 | length = 1; |
| 126 | } |
| 127 | if (huff->num >= huff->max_num) { |
| 128 | av_log(ctx->avctx, AV_LOG_DEBUG, "Too many literals\n"); |
| 129 | return AVERROR_INVALIDDATA; |
| 130 | } |
| 131 | huff->nums[huff->num] = get_bits_long(&ctx->gb, huff->val_bits); |
| 132 | huff->bits[huff->num] = prefix; |
| 133 | huff->lens[huff->num] = length; |
| 134 | huff->num++; |
| 135 | return 0; |
| 136 | } else { /* non-terminal node */ |
| 137 | if ((ret = tm2_read_tree(ctx, prefix << 1, length + 1, huff)) < 0) |
| 138 | return ret; |
| 139 | if ((ret = tm2_read_tree(ctx, (prefix << 1) | 1, length + 1, huff)) < 0) |
| 140 | return ret; |
| 141 | } |
| 142 | return 0; |
| 143 | } |
| 144 | |
| 145 | static int tm2_build_huff_table(TM2Context *ctx, TM2Codes *code) |
| 146 | { |
| 147 | TM2Huff huff; |
| 148 | int res = 0; |
| 149 | |
| 150 | huff.val_bits = get_bits(&ctx->gb, 5); |
| 151 | huff.max_bits = get_bits(&ctx->gb, 5); |
| 152 | huff.min_bits = get_bits(&ctx->gb, 5); |
| 153 | huff.nodes = get_bits_long(&ctx->gb, 17); |
| 154 | huff.num = 0; |
| 155 | |
| 156 | /* check for correct codes parameters */ |
| 157 | if ((huff.val_bits < 1) || (huff.val_bits > 32) || |
| 158 | (huff.max_bits < 0) || (huff.max_bits > 25)) { |
| 159 | av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect tree parameters - literal " |
| 160 | "length: %i, max code length: %i\n", huff.val_bits, huff.max_bits); |
| 161 | return AVERROR_INVALIDDATA; |
| 162 | } |
| 163 | if ((huff.nodes <= 0) || (huff.nodes > 0x10000)) { |
| 164 | av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of Huffman tree " |
| 165 | "nodes: %i\n", huff.nodes); |
| 166 | return AVERROR_INVALIDDATA; |
| 167 | } |
| 168 | /* one-node tree */ |
| 169 | if (huff.max_bits == 0) |
| 170 | huff.max_bits = 1; |
| 171 | |
| 172 | /* allocate space for codes - it is exactly ceil(nodes / 2) entries */ |
| 173 | huff.max_num = (huff.nodes + 1) >> 1; |
| 174 | huff.nums = av_calloc(huff.max_num, sizeof(int)); |
| 175 | huff.bits = av_calloc(huff.max_num, sizeof(uint32_t)); |
| 176 | huff.lens = av_calloc(huff.max_num, sizeof(int)); |
| 177 | |
| 178 | if (!huff.nums || !huff.bits || !huff.lens) { |
| 179 | res = AVERROR(ENOMEM); |
| 180 | goto fail; |
| 181 | } |
| 182 | |
| 183 | res = tm2_read_tree(ctx, 0, 0, &huff); |
| 184 | |
| 185 | if (huff.num != huff.max_num) { |
| 186 | av_log(ctx->avctx, AV_LOG_ERROR, "Got less codes than expected: %i of %i\n", |
| 187 | huff.num, huff.max_num); |
| 188 | res = AVERROR_INVALIDDATA; |
| 189 | } |
| 190 | |
| 191 | /* convert codes to vlc_table */ |
| 192 | if (res >= 0) { |
| 193 | int i; |
| 194 | |
| 195 | res = init_vlc(&code->vlc, huff.max_bits, huff.max_num, |
| 196 | huff.lens, sizeof(int), sizeof(int), |
| 197 | huff.bits, sizeof(uint32_t), sizeof(uint32_t), 0); |
| 198 | if (res < 0) |
| 199 | av_log(ctx->avctx, AV_LOG_ERROR, "Cannot build VLC table\n"); |
| 200 | else { |
| 201 | code->bits = huff.max_bits; |
| 202 | code->length = huff.max_num; |
| 203 | code->recode = av_malloc_array(code->length, sizeof(int)); |
| 204 | if (!code->recode) { |
| 205 | res = AVERROR(ENOMEM); |
| 206 | goto fail; |
| 207 | } |
| 208 | for (i = 0; i < code->length; i++) |
| 209 | code->recode[i] = huff.nums[i]; |
| 210 | } |
| 211 | } |
| 212 | fail: |
| 213 | /* free allocated memory */ |
| 214 | av_free(huff.nums); |
| 215 | av_free(huff.bits); |
| 216 | av_free(huff.lens); |
| 217 | |
| 218 | return res; |
| 219 | } |
| 220 | |
| 221 | static void tm2_free_codes(TM2Codes *code) |
| 222 | { |
| 223 | av_free(code->recode); |
| 224 | if (code->vlc.table) |
| 225 | ff_free_vlc(&code->vlc); |
| 226 | } |
| 227 | |
| 228 | static inline int tm2_get_token(GetBitContext *gb, TM2Codes *code) |
| 229 | { |
| 230 | int val; |
| 231 | val = get_vlc2(gb, code->vlc.table, code->bits, 1); |
| 232 | if(val<0) |
| 233 | return -1; |
| 234 | return code->recode[val]; |
| 235 | } |
| 236 | |
| 237 | #define TM2_OLD_HEADER_MAGIC 0x00000100 |
| 238 | #define TM2_NEW_HEADER_MAGIC 0x00000101 |
| 239 | |
| 240 | static inline int tm2_read_header(TM2Context *ctx, const uint8_t *buf) |
| 241 | { |
| 242 | uint32_t magic = AV_RL32(buf); |
| 243 | |
| 244 | switch (magic) { |
| 245 | case TM2_OLD_HEADER_MAGIC: |
| 246 | avpriv_request_sample(ctx->avctx, "Old TM2 header"); |
| 247 | return 0; |
| 248 | case TM2_NEW_HEADER_MAGIC: |
| 249 | return 0; |
| 250 | default: |
| 251 | av_log(ctx->avctx, AV_LOG_ERROR, "Not a TM2 header: 0x%08"PRIX32"\n", |
| 252 | magic); |
| 253 | return AVERROR_INVALIDDATA; |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | static int tm2_read_deltas(TM2Context *ctx, int stream_id) |
| 258 | { |
| 259 | int d, mb; |
| 260 | int i, v; |
| 261 | |
| 262 | d = get_bits(&ctx->gb, 9); |
| 263 | mb = get_bits(&ctx->gb, 5); |
| 264 | |
| 265 | av_assert2(mb < 32); |
| 266 | if ((d < 1) || (d > TM2_DELTAS) || (mb < 1)) { |
| 267 | av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect delta table: %i deltas x %i bits\n", d, mb); |
| 268 | return AVERROR_INVALIDDATA; |
| 269 | } |
| 270 | |
| 271 | for (i = 0; i < d; i++) { |
| 272 | v = get_bits_long(&ctx->gb, mb); |
| 273 | if (v & (1 << (mb - 1))) |
| 274 | ctx->deltas[stream_id][i] = v - (1 << mb); |
| 275 | else |
| 276 | ctx->deltas[stream_id][i] = v; |
| 277 | } |
| 278 | for (; i < TM2_DELTAS; i++) |
| 279 | ctx->deltas[stream_id][i] = 0; |
| 280 | |
| 281 | return 0; |
| 282 | } |
| 283 | |
| 284 | static int tm2_read_stream(TM2Context *ctx, const uint8_t *buf, int stream_id, int buf_size) |
| 285 | { |
| 286 | int i, ret; |
| 287 | int skip = 0; |
| 288 | int len, toks, pos; |
| 289 | TM2Codes codes; |
| 290 | GetByteContext gb; |
| 291 | |
| 292 | if (buf_size < 4) { |
| 293 | av_log(ctx->avctx, AV_LOG_ERROR, "not enough space for len left\n"); |
| 294 | return AVERROR_INVALIDDATA; |
| 295 | } |
| 296 | |
| 297 | /* get stream length in dwords */ |
| 298 | bytestream2_init(&gb, buf, buf_size); |
| 299 | len = bytestream2_get_be32(&gb); |
| 300 | skip = len * 4 + 4; |
| 301 | |
| 302 | if (len == 0) |
| 303 | return 4; |
| 304 | |
| 305 | if (len >= INT_MAX/4-1 || len < 0 || skip > buf_size) { |
| 306 | av_log(ctx->avctx, AV_LOG_ERROR, "invalid stream size\n"); |
| 307 | return AVERROR_INVALIDDATA; |
| 308 | } |
| 309 | |
| 310 | toks = bytestream2_get_be32(&gb); |
| 311 | if (toks & 1) { |
| 312 | len = bytestream2_get_be32(&gb); |
| 313 | if (len == TM2_ESCAPE) { |
| 314 | len = bytestream2_get_be32(&gb); |
| 315 | } |
| 316 | if (len > 0) { |
| 317 | pos = bytestream2_tell(&gb); |
| 318 | if (skip <= pos) |
| 319 | return AVERROR_INVALIDDATA; |
| 320 | init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8); |
| 321 | if ((ret = tm2_read_deltas(ctx, stream_id)) < 0) |
| 322 | return ret; |
| 323 | bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2); |
| 324 | } |
| 325 | } |
| 326 | /* skip unused fields */ |
| 327 | len = bytestream2_get_be32(&gb); |
| 328 | if (len == TM2_ESCAPE) { /* some unknown length - could be escaped too */ |
| 329 | bytestream2_skip(&gb, 8); /* unused by decoder */ |
| 330 | } else { |
| 331 | bytestream2_skip(&gb, 4); /* unused by decoder */ |
| 332 | } |
| 333 | |
| 334 | pos = bytestream2_tell(&gb); |
| 335 | if (skip <= pos) |
| 336 | return AVERROR_INVALIDDATA; |
| 337 | init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8); |
| 338 | if ((ret = tm2_build_huff_table(ctx, &codes)) < 0) |
| 339 | return ret; |
| 340 | bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2); |
| 341 | |
| 342 | toks >>= 1; |
| 343 | /* check if we have sane number of tokens */ |
| 344 | if ((toks < 0) || (toks > 0xFFFFFF)) { |
| 345 | av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks); |
| 346 | tm2_free_codes(&codes); |
| 347 | return AVERROR_INVALIDDATA; |
| 348 | } |
| 349 | ret = av_reallocp_array(&ctx->tokens[stream_id], toks, sizeof(int)); |
| 350 | if (ret < 0) { |
| 351 | ctx->tok_lens[stream_id] = 0; |
| 352 | return ret; |
| 353 | } |
| 354 | ctx->tok_lens[stream_id] = toks; |
| 355 | len = bytestream2_get_be32(&gb); |
| 356 | if (len > 0) { |
| 357 | pos = bytestream2_tell(&gb); |
| 358 | if (skip <= pos) |
| 359 | return AVERROR_INVALIDDATA; |
| 360 | init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8); |
| 361 | for (i = 0; i < toks; i++) { |
| 362 | if (get_bits_left(&ctx->gb) <= 0) { |
| 363 | av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks); |
| 364 | return AVERROR_INVALIDDATA; |
| 365 | } |
| 366 | ctx->tokens[stream_id][i] = tm2_get_token(&ctx->gb, &codes); |
| 367 | if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS || ctx->tokens[stream_id][i]<0) { |
| 368 | av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n", |
| 369 | ctx->tokens[stream_id][i], stream_id, i); |
| 370 | return AVERROR_INVALIDDATA; |
| 371 | } |
| 372 | } |
| 373 | } else { |
| 374 | for (i = 0; i < toks; i++) { |
| 375 | ctx->tokens[stream_id][i] = codes.recode[0]; |
| 376 | if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS) { |
| 377 | av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n", |
| 378 | ctx->tokens[stream_id][i], stream_id, i); |
| 379 | return AVERROR_INVALIDDATA; |
| 380 | } |
| 381 | } |
| 382 | } |
| 383 | tm2_free_codes(&codes); |
| 384 | |
| 385 | return skip; |
| 386 | } |
| 387 | |
| 388 | static inline int GET_TOK(TM2Context *ctx,int type) |
| 389 | { |
| 390 | if (ctx->tok_ptrs[type] >= ctx->tok_lens[type]) { |
| 391 | av_log(ctx->avctx, AV_LOG_ERROR, "Read token from stream %i out of bounds (%i>=%i)\n", type, ctx->tok_ptrs[type], ctx->tok_lens[type]); |
| 392 | return 0; |
| 393 | } |
| 394 | if (type <= TM2_MOT) { |
| 395 | if (ctx->tokens[type][ctx->tok_ptrs[type]] >= TM2_DELTAS) { |
| 396 | av_log(ctx->avctx, AV_LOG_ERROR, "token %d is too large\n", ctx->tokens[type][ctx->tok_ptrs[type]]); |
| 397 | return 0; |
| 398 | } |
| 399 | return ctx->deltas[type][ctx->tokens[type][ctx->tok_ptrs[type]++]]; |
| 400 | } |
| 401 | return ctx->tokens[type][ctx->tok_ptrs[type]++]; |
| 402 | } |
| 403 | |
| 404 | /* blocks decoding routines */ |
| 405 | |
| 406 | /* common Y, U, V pointers initialisation */ |
| 407 | #define TM2_INIT_POINTERS() \ |
| 408 | int *last, *clast; \ |
| 409 | int *Y, *U, *V;\ |
| 410 | int Ystride, Ustride, Vstride;\ |
| 411 | \ |
| 412 | Ystride = ctx->y_stride;\ |
| 413 | Vstride = ctx->uv_stride;\ |
| 414 | Ustride = ctx->uv_stride;\ |
| 415 | Y = (ctx->cur?ctx->Y2:ctx->Y1) + by * 4 * Ystride + bx * 4;\ |
| 416 | V = (ctx->cur?ctx->V2:ctx->V1) + by * 2 * Vstride + bx * 2;\ |
| 417 | U = (ctx->cur?ctx->U2:ctx->U1) + by * 2 * Ustride + bx * 2;\ |
| 418 | last = ctx->last + bx * 4;\ |
| 419 | clast = ctx->clast + bx * 4; |
| 420 | |
| 421 | #define TM2_INIT_POINTERS_2() \ |
| 422 | int *Yo, *Uo, *Vo;\ |
| 423 | int oYstride, oUstride, oVstride;\ |
| 424 | \ |
| 425 | TM2_INIT_POINTERS();\ |
| 426 | oYstride = Ystride;\ |
| 427 | oVstride = Vstride;\ |
| 428 | oUstride = Ustride;\ |
| 429 | Yo = (ctx->cur?ctx->Y1:ctx->Y2) + by * 4 * oYstride + bx * 4;\ |
| 430 | Vo = (ctx->cur?ctx->V1:ctx->V2) + by * 2 * oVstride + bx * 2;\ |
| 431 | Uo = (ctx->cur?ctx->U1:ctx->U2) + by * 2 * oUstride + bx * 2; |
| 432 | |
| 433 | /* recalculate last and delta values for next blocks */ |
| 434 | #define TM2_RECALC_BLOCK(CHR, stride, last, CD) {\ |
| 435 | CD[0] = CHR[1] - last[1];\ |
| 436 | CD[1] = (int)CHR[stride + 1] - (int)CHR[1];\ |
| 437 | last[0] = (int)CHR[stride + 0];\ |
| 438 | last[1] = (int)CHR[stride + 1];} |
| 439 | |
| 440 | /* common operations - add deltas to 4x4 block of luma or 2x2 blocks of chroma */ |
| 441 | static inline void tm2_apply_deltas(TM2Context *ctx, int* Y, int stride, int *deltas, int *last) |
| 442 | { |
| 443 | int ct, d; |
| 444 | int i, j; |
| 445 | |
| 446 | for (j = 0; j < 4; j++){ |
| 447 | ct = ctx->D[j]; |
| 448 | for (i = 0; i < 4; i++){ |
| 449 | d = deltas[i + j * 4]; |
| 450 | ct += d; |
| 451 | last[i] += ct; |
| 452 | Y[i] = av_clip_uint8(last[i]); |
| 453 | } |
| 454 | Y += stride; |
| 455 | ctx->D[j] = ct; |
| 456 | } |
| 457 | } |
| 458 | |
| 459 | static inline void tm2_high_chroma(int *data, int stride, int *last, int *CD, int *deltas) |
| 460 | { |
| 461 | int i, j; |
| 462 | for (j = 0; j < 2; j++) { |
| 463 | for (i = 0; i < 2; i++) { |
| 464 | CD[j] += deltas[i + j * 2]; |
| 465 | last[i] += CD[j]; |
| 466 | data[i] = last[i]; |
| 467 | } |
| 468 | data += stride; |
| 469 | } |
| 470 | } |
| 471 | |
| 472 | static inline void tm2_low_chroma(int *data, int stride, int *clast, int *CD, int *deltas, int bx) |
| 473 | { |
| 474 | int t; |
| 475 | int l; |
| 476 | int prev; |
| 477 | |
| 478 | if (bx > 0) |
| 479 | prev = clast[-3]; |
| 480 | else |
| 481 | prev = 0; |
| 482 | t = (CD[0] + CD[1]) >> 1; |
| 483 | l = (prev - CD[0] - CD[1] + clast[1]) >> 1; |
| 484 | CD[1] = CD[0] + CD[1] - t; |
| 485 | CD[0] = t; |
| 486 | clast[0] = l; |
| 487 | |
| 488 | tm2_high_chroma(data, stride, clast, CD, deltas); |
| 489 | } |
| 490 | |
| 491 | static inline void tm2_hi_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by) |
| 492 | { |
| 493 | int i; |
| 494 | int deltas[16]; |
| 495 | TM2_INIT_POINTERS(); |
| 496 | |
| 497 | /* hi-res chroma */ |
| 498 | for (i = 0; i < 4; i++) { |
| 499 | deltas[i] = GET_TOK(ctx, TM2_C_HI); |
| 500 | deltas[i + 4] = GET_TOK(ctx, TM2_C_HI); |
| 501 | } |
| 502 | tm2_high_chroma(U, Ustride, clast, ctx->CD, deltas); |
| 503 | tm2_high_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas + 4); |
| 504 | |
| 505 | /* hi-res luma */ |
| 506 | for (i = 0; i < 16; i++) |
| 507 | deltas[i] = GET_TOK(ctx, TM2_L_HI); |
| 508 | |
| 509 | tm2_apply_deltas(ctx, Y, Ystride, deltas, last); |
| 510 | } |
| 511 | |
| 512 | static inline void tm2_med_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by) |
| 513 | { |
| 514 | int i; |
| 515 | int deltas[16]; |
| 516 | TM2_INIT_POINTERS(); |
| 517 | |
| 518 | /* low-res chroma */ |
| 519 | deltas[0] = GET_TOK(ctx, TM2_C_LO); |
| 520 | deltas[1] = deltas[2] = deltas[3] = 0; |
| 521 | tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx); |
| 522 | |
| 523 | deltas[0] = GET_TOK(ctx, TM2_C_LO); |
| 524 | deltas[1] = deltas[2] = deltas[3] = 0; |
| 525 | tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx); |
| 526 | |
| 527 | /* hi-res luma */ |
| 528 | for (i = 0; i < 16; i++) |
| 529 | deltas[i] = GET_TOK(ctx, TM2_L_HI); |
| 530 | |
| 531 | tm2_apply_deltas(ctx, Y, Ystride, deltas, last); |
| 532 | } |
| 533 | |
| 534 | static inline void tm2_low_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by) |
| 535 | { |
| 536 | int i; |
| 537 | int t1, t2; |
| 538 | int deltas[16]; |
| 539 | TM2_INIT_POINTERS(); |
| 540 | |
| 541 | /* low-res chroma */ |
| 542 | deltas[0] = GET_TOK(ctx, TM2_C_LO); |
| 543 | deltas[1] = deltas[2] = deltas[3] = 0; |
| 544 | tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx); |
| 545 | |
| 546 | deltas[0] = GET_TOK(ctx, TM2_C_LO); |
| 547 | deltas[1] = deltas[2] = deltas[3] = 0; |
| 548 | tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx); |
| 549 | |
| 550 | /* low-res luma */ |
| 551 | for (i = 0; i < 16; i++) |
| 552 | deltas[i] = 0; |
| 553 | |
| 554 | deltas[ 0] = GET_TOK(ctx, TM2_L_LO); |
| 555 | deltas[ 2] = GET_TOK(ctx, TM2_L_LO); |
| 556 | deltas[ 8] = GET_TOK(ctx, TM2_L_LO); |
| 557 | deltas[10] = GET_TOK(ctx, TM2_L_LO); |
| 558 | |
| 559 | if (bx > 0) |
| 560 | last[0] = (last[-1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3] + last[1]) >> 1; |
| 561 | else |
| 562 | last[0] = (last[1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3])>> 1; |
| 563 | last[2] = (last[1] + last[3]) >> 1; |
| 564 | |
| 565 | t1 = ctx->D[0] + ctx->D[1]; |
| 566 | ctx->D[0] = t1 >> 1; |
| 567 | ctx->D[1] = t1 - (t1 >> 1); |
| 568 | t2 = ctx->D[2] + ctx->D[3]; |
| 569 | ctx->D[2] = t2 >> 1; |
| 570 | ctx->D[3] = t2 - (t2 >> 1); |
| 571 | |
| 572 | tm2_apply_deltas(ctx, Y, Ystride, deltas, last); |
| 573 | } |
| 574 | |
| 575 | static inline void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by) |
| 576 | { |
| 577 | int i; |
| 578 | int ct; |
| 579 | int left, right, diff; |
| 580 | int deltas[16]; |
| 581 | TM2_INIT_POINTERS(); |
| 582 | |
| 583 | /* null chroma */ |
| 584 | deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0; |
| 585 | tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx); |
| 586 | |
| 587 | deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0; |
| 588 | tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx); |
| 589 | |
| 590 | /* null luma */ |
| 591 | for (i = 0; i < 16; i++) |
| 592 | deltas[i] = 0; |
| 593 | |
| 594 | ct = ctx->D[0] + ctx->D[1] + ctx->D[2] + ctx->D[3]; |
| 595 | |
| 596 | if (bx > 0) |
| 597 | left = last[-1] - ct; |
| 598 | else |
| 599 | left = 0; |
| 600 | |
| 601 | right = last[3]; |
| 602 | diff = right - left; |
| 603 | last[0] = left + (diff >> 2); |
| 604 | last[1] = left + (diff >> 1); |
| 605 | last[2] = right - (diff >> 2); |
| 606 | last[3] = right; |
| 607 | { |
| 608 | int tp = left; |
| 609 | |
| 610 | ctx->D[0] = (tp + (ct >> 2)) - left; |
| 611 | left += ctx->D[0]; |
| 612 | ctx->D[1] = (tp + (ct >> 1)) - left; |
| 613 | left += ctx->D[1]; |
| 614 | ctx->D[2] = ((tp + ct) - (ct >> 2)) - left; |
| 615 | left += ctx->D[2]; |
| 616 | ctx->D[3] = (tp + ct) - left; |
| 617 | } |
| 618 | tm2_apply_deltas(ctx, Y, Ystride, deltas, last); |
| 619 | } |
| 620 | |
| 621 | static inline void tm2_still_block(TM2Context *ctx, AVFrame *pic, int bx, int by) |
| 622 | { |
| 623 | int i, j; |
| 624 | TM2_INIT_POINTERS_2(); |
| 625 | |
| 626 | /* update chroma */ |
| 627 | for (j = 0; j < 2; j++) { |
| 628 | for (i = 0; i < 2; i++){ |
| 629 | U[i] = Uo[i]; |
| 630 | V[i] = Vo[i]; |
| 631 | } |
| 632 | U += Ustride; V += Vstride; |
| 633 | Uo += oUstride; Vo += oVstride; |
| 634 | } |
| 635 | U -= Ustride * 2; |
| 636 | V -= Vstride * 2; |
| 637 | TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD); |
| 638 | TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2)); |
| 639 | |
| 640 | /* update deltas */ |
| 641 | ctx->D[0] = Yo[3] - last[3]; |
| 642 | ctx->D[1] = Yo[3 + oYstride] - Yo[3]; |
| 643 | ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride]; |
| 644 | ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2]; |
| 645 | |
| 646 | for (j = 0; j < 4; j++) { |
| 647 | for (i = 0; i < 4; i++) { |
| 648 | Y[i] = Yo[i]; |
| 649 | last[i] = Yo[i]; |
| 650 | } |
| 651 | Y += Ystride; |
| 652 | Yo += oYstride; |
| 653 | } |
| 654 | } |
| 655 | |
| 656 | static inline void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int by) |
| 657 | { |
| 658 | int i, j; |
| 659 | int d; |
| 660 | TM2_INIT_POINTERS_2(); |
| 661 | |
| 662 | /* update chroma */ |
| 663 | for (j = 0; j < 2; j++) { |
| 664 | for (i = 0; i < 2; i++) { |
| 665 | U[i] = Uo[i] + GET_TOK(ctx, TM2_UPD); |
| 666 | V[i] = Vo[i] + GET_TOK(ctx, TM2_UPD); |
| 667 | } |
| 668 | U += Ustride; |
| 669 | V += Vstride; |
| 670 | Uo += oUstride; |
| 671 | Vo += oVstride; |
| 672 | } |
| 673 | U -= Ustride * 2; |
| 674 | V -= Vstride * 2; |
| 675 | TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD); |
| 676 | TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2)); |
| 677 | |
| 678 | /* update deltas */ |
| 679 | ctx->D[0] = Yo[3] - last[3]; |
| 680 | ctx->D[1] = Yo[3 + oYstride] - Yo[3]; |
| 681 | ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride]; |
| 682 | ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2]; |
| 683 | |
| 684 | for (j = 0; j < 4; j++) { |
| 685 | d = last[3]; |
| 686 | for (i = 0; i < 4; i++) { |
| 687 | Y[i] = Yo[i] + GET_TOK(ctx, TM2_UPD); |
| 688 | last[i] = Y[i]; |
| 689 | } |
| 690 | ctx->D[j] = last[3] - d; |
| 691 | Y += Ystride; |
| 692 | Yo += oYstride; |
| 693 | } |
| 694 | } |
| 695 | |
| 696 | static inline void tm2_motion_block(TM2Context *ctx, AVFrame *pic, int bx, int by) |
| 697 | { |
| 698 | int i, j; |
| 699 | int mx, my; |
| 700 | TM2_INIT_POINTERS_2(); |
| 701 | |
| 702 | mx = GET_TOK(ctx, TM2_MOT); |
| 703 | my = GET_TOK(ctx, TM2_MOT); |
| 704 | mx = av_clip(mx, -(bx * 4 + 4), ctx->avctx->width - bx * 4); |
| 705 | my = av_clip(my, -(by * 4 + 4), ctx->avctx->height - by * 4); |
| 706 | |
| 707 | if (4*bx+mx<0 || 4*by+my<0 || 4*bx+mx+4 > ctx->avctx->width || 4*by+my+4 > ctx->avctx->height) { |
| 708 | av_log(ctx->avctx, AV_LOG_ERROR, "MV out of picture\n"); |
| 709 | return; |
| 710 | } |
| 711 | |
| 712 | Yo += my * oYstride + mx; |
| 713 | Uo += (my >> 1) * oUstride + (mx >> 1); |
| 714 | Vo += (my >> 1) * oVstride + (mx >> 1); |
| 715 | |
| 716 | /* copy chroma */ |
| 717 | for (j = 0; j < 2; j++) { |
| 718 | for (i = 0; i < 2; i++) { |
| 719 | U[i] = Uo[i]; |
| 720 | V[i] = Vo[i]; |
| 721 | } |
| 722 | U += Ustride; |
| 723 | V += Vstride; |
| 724 | Uo += oUstride; |
| 725 | Vo += oVstride; |
| 726 | } |
| 727 | U -= Ustride * 2; |
| 728 | V -= Vstride * 2; |
| 729 | TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD); |
| 730 | TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2)); |
| 731 | |
| 732 | /* copy luma */ |
| 733 | for (j = 0; j < 4; j++) { |
| 734 | for (i = 0; i < 4; i++) { |
| 735 | Y[i] = Yo[i]; |
| 736 | } |
| 737 | Y += Ystride; |
| 738 | Yo += oYstride; |
| 739 | } |
| 740 | /* calculate deltas */ |
| 741 | Y -= Ystride * 4; |
| 742 | ctx->D[0] = Y[3] - last[3]; |
| 743 | ctx->D[1] = Y[3 + Ystride] - Y[3]; |
| 744 | ctx->D[2] = Y[3 + Ystride * 2] - Y[3 + Ystride]; |
| 745 | ctx->D[3] = Y[3 + Ystride * 3] - Y[3 + Ystride * 2]; |
| 746 | for (i = 0; i < 4; i++) |
| 747 | last[i] = Y[i + Ystride * 3]; |
| 748 | } |
| 749 | |
| 750 | static int tm2_decode_blocks(TM2Context *ctx, AVFrame *p) |
| 751 | { |
| 752 | int i, j; |
| 753 | int w = ctx->avctx->width, h = ctx->avctx->height, bw = w >> 2, bh = h >> 2, cw = w >> 1; |
| 754 | int type; |
| 755 | int keyframe = 1; |
| 756 | int *Y, *U, *V; |
| 757 | uint8_t *dst; |
| 758 | |
| 759 | for (i = 0; i < TM2_NUM_STREAMS; i++) |
| 760 | ctx->tok_ptrs[i] = 0; |
| 761 | |
| 762 | if (ctx->tok_lens[TM2_TYPE]<bw*bh) { |
| 763 | av_log(ctx->avctx,AV_LOG_ERROR,"Got %i tokens for %i blocks\n",ctx->tok_lens[TM2_TYPE],bw*bh); |
| 764 | return AVERROR_INVALIDDATA; |
| 765 | } |
| 766 | |
| 767 | memset(ctx->last, 0, 4 * bw * sizeof(int)); |
| 768 | memset(ctx->clast, 0, 4 * bw * sizeof(int)); |
| 769 | |
| 770 | for (j = 0; j < bh; j++) { |
| 771 | memset(ctx->D, 0, 4 * sizeof(int)); |
| 772 | memset(ctx->CD, 0, 4 * sizeof(int)); |
| 773 | for (i = 0; i < bw; i++) { |
| 774 | type = GET_TOK(ctx, TM2_TYPE); |
| 775 | switch(type) { |
| 776 | case TM2_HI_RES: |
| 777 | tm2_hi_res_block(ctx, p, i, j); |
| 778 | break; |
| 779 | case TM2_MED_RES: |
| 780 | tm2_med_res_block(ctx, p, i, j); |
| 781 | break; |
| 782 | case TM2_LOW_RES: |
| 783 | tm2_low_res_block(ctx, p, i, j); |
| 784 | break; |
| 785 | case TM2_NULL_RES: |
| 786 | tm2_null_res_block(ctx, p, i, j); |
| 787 | break; |
| 788 | case TM2_UPDATE: |
| 789 | tm2_update_block(ctx, p, i, j); |
| 790 | keyframe = 0; |
| 791 | break; |
| 792 | case TM2_STILL: |
| 793 | tm2_still_block(ctx, p, i, j); |
| 794 | keyframe = 0; |
| 795 | break; |
| 796 | case TM2_MOTION: |
| 797 | tm2_motion_block(ctx, p, i, j); |
| 798 | keyframe = 0; |
| 799 | break; |
| 800 | default: |
| 801 | av_log(ctx->avctx, AV_LOG_ERROR, "Skipping unknown block type %i\n", type); |
| 802 | } |
| 803 | } |
| 804 | } |
| 805 | |
| 806 | /* copy data from our buffer to AVFrame */ |
| 807 | Y = (ctx->cur?ctx->Y2:ctx->Y1); |
| 808 | U = (ctx->cur?ctx->U2:ctx->U1); |
| 809 | V = (ctx->cur?ctx->V2:ctx->V1); |
| 810 | dst = p->data[0]; |
| 811 | for (j = 0; j < h; j++) { |
| 812 | for (i = 0; i < w; i++) { |
| 813 | int y = Y[i], u = U[i >> 1], v = V[i >> 1]; |
| 814 | dst[3*i+0] = av_clip_uint8(y + v); |
| 815 | dst[3*i+1] = av_clip_uint8(y); |
| 816 | dst[3*i+2] = av_clip_uint8(y + u); |
| 817 | } |
| 818 | |
| 819 | /* horizontal edge extension */ |
| 820 | Y[-4] = Y[-3] = Y[-2] = Y[-1] = Y[0]; |
| 821 | Y[w + 3] = Y[w + 2] = Y[w + 1] = Y[w] = Y[w - 1]; |
| 822 | |
| 823 | /* vertical edge extension */ |
| 824 | if (j == 0) { |
| 825 | memcpy(Y - 4 - 1 * ctx->y_stride, Y - 4, ctx->y_stride); |
| 826 | memcpy(Y - 4 - 2 * ctx->y_stride, Y - 4, ctx->y_stride); |
| 827 | memcpy(Y - 4 - 3 * ctx->y_stride, Y - 4, ctx->y_stride); |
| 828 | memcpy(Y - 4 - 4 * ctx->y_stride, Y - 4, ctx->y_stride); |
| 829 | } else if (j == h - 1) { |
| 830 | memcpy(Y - 4 + 1 * ctx->y_stride, Y - 4, ctx->y_stride); |
| 831 | memcpy(Y - 4 + 2 * ctx->y_stride, Y - 4, ctx->y_stride); |
| 832 | memcpy(Y - 4 + 3 * ctx->y_stride, Y - 4, ctx->y_stride); |
| 833 | memcpy(Y - 4 + 4 * ctx->y_stride, Y - 4, ctx->y_stride); |
| 834 | } |
| 835 | |
| 836 | Y += ctx->y_stride; |
| 837 | if (j & 1) { |
| 838 | /* horizontal edge extension */ |
| 839 | U[-2] = U[-1] = U[0]; |
| 840 | V[-2] = V[-1] = V[0]; |
| 841 | U[cw + 1] = U[cw] = U[cw - 1]; |
| 842 | V[cw + 1] = V[cw] = V[cw - 1]; |
| 843 | |
| 844 | /* vertical edge extension */ |
| 845 | if (j == 1) { |
| 846 | memcpy(U - 2 - 1 * ctx->uv_stride, U - 2, ctx->uv_stride); |
| 847 | memcpy(V - 2 - 1 * ctx->uv_stride, V - 2, ctx->uv_stride); |
| 848 | memcpy(U - 2 - 2 * ctx->uv_stride, U - 2, ctx->uv_stride); |
| 849 | memcpy(V - 2 - 2 * ctx->uv_stride, V - 2, ctx->uv_stride); |
| 850 | } else if (j == h - 1) { |
| 851 | memcpy(U - 2 + 1 * ctx->uv_stride, U - 2, ctx->uv_stride); |
| 852 | memcpy(V - 2 + 1 * ctx->uv_stride, V - 2, ctx->uv_stride); |
| 853 | memcpy(U - 2 + 2 * ctx->uv_stride, U - 2, ctx->uv_stride); |
| 854 | memcpy(V - 2 + 2 * ctx->uv_stride, V - 2, ctx->uv_stride); |
| 855 | } |
| 856 | |
| 857 | U += ctx->uv_stride; |
| 858 | V += ctx->uv_stride; |
| 859 | } |
| 860 | dst += p->linesize[0]; |
| 861 | } |
| 862 | |
| 863 | return keyframe; |
| 864 | } |
| 865 | |
| 866 | static const int tm2_stream_order[TM2_NUM_STREAMS] = { |
| 867 | TM2_C_HI, TM2_C_LO, TM2_L_HI, TM2_L_LO, TM2_UPD, TM2_MOT, TM2_TYPE |
| 868 | }; |
| 869 | |
| 870 | #define TM2_HEADER_SIZE 40 |
| 871 | |
| 872 | static int decode_frame(AVCodecContext *avctx, |
| 873 | void *data, int *got_frame, |
| 874 | AVPacket *avpkt) |
| 875 | { |
| 876 | TM2Context * const l = avctx->priv_data; |
| 877 | const uint8_t *buf = avpkt->data; |
| 878 | int buf_size = avpkt->size & ~3; |
| 879 | AVFrame * const p = l->pic; |
| 880 | int offset = TM2_HEADER_SIZE; |
| 881 | int i, t, ret; |
| 882 | |
| 883 | av_fast_padded_malloc(&l->buffer, &l->buffer_size, buf_size); |
| 884 | if (!l->buffer) { |
| 885 | av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n"); |
| 886 | return AVERROR(ENOMEM); |
| 887 | } |
| 888 | |
| 889 | if ((ret = ff_reget_buffer(avctx, p)) < 0) |
| 890 | return ret; |
| 891 | |
| 892 | l->bdsp.bswap_buf((uint32_t *) l->buffer, (const uint32_t *) buf, |
| 893 | buf_size >> 2); |
| 894 | |
| 895 | if ((ret = tm2_read_header(l, l->buffer)) < 0) { |
| 896 | return ret; |
| 897 | } |
| 898 | |
| 899 | for (i = 0; i < TM2_NUM_STREAMS; i++) { |
| 900 | if (offset >= buf_size) { |
| 901 | av_log(avctx, AV_LOG_ERROR, "no space for tm2_read_stream\n"); |
| 902 | return AVERROR_INVALIDDATA; |
| 903 | } |
| 904 | |
| 905 | t = tm2_read_stream(l, l->buffer + offset, tm2_stream_order[i], |
| 906 | buf_size - offset); |
| 907 | if (t < 0) { |
| 908 | int j = tm2_stream_order[i]; |
| 909 | memset(l->tokens[j], 0, sizeof(**l->tokens) * l->tok_lens[j]); |
| 910 | return t; |
| 911 | } |
| 912 | offset += t; |
| 913 | } |
| 914 | p->key_frame = tm2_decode_blocks(l, p); |
| 915 | if (p->key_frame) |
| 916 | p->pict_type = AV_PICTURE_TYPE_I; |
| 917 | else |
| 918 | p->pict_type = AV_PICTURE_TYPE_P; |
| 919 | |
| 920 | l->cur = !l->cur; |
| 921 | *got_frame = 1; |
| 922 | ret = av_frame_ref(data, l->pic); |
| 923 | |
| 924 | return (ret < 0) ? ret : buf_size; |
| 925 | } |
| 926 | |
| 927 | static av_cold int decode_init(AVCodecContext *avctx) |
| 928 | { |
| 929 | TM2Context * const l = avctx->priv_data; |
| 930 | int i, w = avctx->width, h = avctx->height; |
| 931 | |
| 932 | if ((avctx->width & 3) || (avctx->height & 3)) { |
| 933 | av_log(avctx, AV_LOG_ERROR, "Width and height must be multiple of 4\n"); |
| 934 | return AVERROR(EINVAL); |
| 935 | } |
| 936 | |
| 937 | l->avctx = avctx; |
| 938 | avctx->pix_fmt = AV_PIX_FMT_BGR24; |
| 939 | |
| 940 | l->pic = av_frame_alloc(); |
| 941 | if (!l->pic) |
| 942 | return AVERROR(ENOMEM); |
| 943 | |
| 944 | ff_bswapdsp_init(&l->bdsp); |
| 945 | |
| 946 | l->last = av_malloc_array(w >> 2, 4 * sizeof(*l->last) ); |
| 947 | l->clast = av_malloc_array(w >> 2, 4 * sizeof(*l->clast)); |
| 948 | |
| 949 | for (i = 0; i < TM2_NUM_STREAMS; i++) { |
| 950 | l->tokens[i] = NULL; |
| 951 | l->tok_lens[i] = 0; |
| 952 | } |
| 953 | |
| 954 | w += 8; |
| 955 | h += 8; |
| 956 | l->Y1_base = av_calloc(w * h, sizeof(*l->Y1_base)); |
| 957 | l->Y2_base = av_calloc(w * h, sizeof(*l->Y2_base)); |
| 958 | l->y_stride = w; |
| 959 | w = (w + 1) >> 1; |
| 960 | h = (h + 1) >> 1; |
| 961 | l->U1_base = av_calloc(w * h, sizeof(*l->U1_base)); |
| 962 | l->V1_base = av_calloc(w * h, sizeof(*l->V1_base)); |
| 963 | l->U2_base = av_calloc(w * h, sizeof(*l->U2_base)); |
| 964 | l->V2_base = av_calloc(w * h, sizeof(*l->V1_base)); |
| 965 | l->uv_stride = w; |
| 966 | l->cur = 0; |
| 967 | if (!l->Y1_base || !l->Y2_base || !l->U1_base || |
| 968 | !l->V1_base || !l->U2_base || !l->V2_base || |
| 969 | !l->last || !l->clast) { |
| 970 | av_freep(&l->Y1_base); |
| 971 | av_freep(&l->Y2_base); |
| 972 | av_freep(&l->U1_base); |
| 973 | av_freep(&l->U2_base); |
| 974 | av_freep(&l->V1_base); |
| 975 | av_freep(&l->V2_base); |
| 976 | av_freep(&l->last); |
| 977 | av_freep(&l->clast); |
| 978 | av_frame_free(&l->pic); |
| 979 | return AVERROR(ENOMEM); |
| 980 | } |
| 981 | l->Y1 = l->Y1_base + l->y_stride * 4 + 4; |
| 982 | l->Y2 = l->Y2_base + l->y_stride * 4 + 4; |
| 983 | l->U1 = l->U1_base + l->uv_stride * 2 + 2; |
| 984 | l->U2 = l->U2_base + l->uv_stride * 2 + 2; |
| 985 | l->V1 = l->V1_base + l->uv_stride * 2 + 2; |
| 986 | l->V2 = l->V2_base + l->uv_stride * 2 + 2; |
| 987 | |
| 988 | return 0; |
| 989 | } |
| 990 | |
| 991 | static av_cold int decode_end(AVCodecContext *avctx) |
| 992 | { |
| 993 | TM2Context * const l = avctx->priv_data; |
| 994 | int i; |
| 995 | |
| 996 | av_free(l->last); |
| 997 | av_free(l->clast); |
| 998 | for (i = 0; i < TM2_NUM_STREAMS; i++) |
| 999 | av_freep(&l->tokens[i]); |
| 1000 | if (l->Y1) { |
| 1001 | av_freep(&l->Y1_base); |
| 1002 | av_freep(&l->U1_base); |
| 1003 | av_freep(&l->V1_base); |
| 1004 | av_freep(&l->Y2_base); |
| 1005 | av_freep(&l->U2_base); |
| 1006 | av_freep(&l->V2_base); |
| 1007 | } |
| 1008 | av_freep(&l->buffer); |
| 1009 | l->buffer_size = 0; |
| 1010 | |
| 1011 | av_frame_free(&l->pic); |
| 1012 | |
| 1013 | return 0; |
| 1014 | } |
| 1015 | |
| 1016 | AVCodec ff_truemotion2_decoder = { |
| 1017 | .name = "truemotion2", |
| 1018 | .long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 2.0"), |
| 1019 | .type = AVMEDIA_TYPE_VIDEO, |
| 1020 | .id = AV_CODEC_ID_TRUEMOTION2, |
| 1021 | .priv_data_size = sizeof(TM2Context), |
| 1022 | .init = decode_init, |
| 1023 | .close = decode_end, |
| 1024 | .decode = decode_frame, |
| 1025 | .capabilities = CODEC_CAP_DR1, |
| 1026 | }; |