Libav 0.7.1
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00001 /* 00002 * Duck/ON2 TrueMotion 2 Decoder 00003 * Copyright (c) 2005 Konstantin Shishkov 00004 * 00005 * This file is part of Libav. 00006 * 00007 * Libav is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Lesser General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2.1 of the License, or (at your option) any later version. 00011 * 00012 * Libav is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Lesser General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Lesser General Public 00018 * License along with Libav; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 00027 #include "avcodec.h" 00028 #include "get_bits.h" 00029 #include "dsputil.h" 00030 00031 #define TM2_ESCAPE 0x80000000 00032 #define TM2_DELTAS 64 00033 /* Huffman-coded streams of different types of blocks */ 00034 enum TM2_STREAMS{ TM2_C_HI = 0, TM2_C_LO, TM2_L_HI, TM2_L_LO, 00035 TM2_UPD, TM2_MOT, TM2_TYPE, TM2_NUM_STREAMS}; 00036 /* Block types */ 00037 enum TM2_BLOCKS{ TM2_HI_RES = 0, TM2_MED_RES, TM2_LOW_RES, TM2_NULL_RES, 00038 TM2_UPDATE, TM2_STILL, TM2_MOTION}; 00039 00040 typedef struct TM2Context{ 00041 AVCodecContext *avctx; 00042 AVFrame pic; 00043 00044 GetBitContext gb; 00045 DSPContext dsp; 00046 00047 /* TM2 streams */ 00048 int *tokens[TM2_NUM_STREAMS]; 00049 int tok_lens[TM2_NUM_STREAMS]; 00050 int tok_ptrs[TM2_NUM_STREAMS]; 00051 int deltas[TM2_NUM_STREAMS][TM2_DELTAS]; 00052 /* for blocks decoding */ 00053 int D[4]; 00054 int CD[4]; 00055 int *last; 00056 int *clast; 00057 00058 /* data for current and previous frame */ 00059 int *Y1, *U1, *V1, *Y2, *U2, *V2; 00060 int cur; 00061 } TM2Context; 00062 00066 typedef struct TM2Codes{ 00067 VLC vlc; 00068 int bits; 00069 int *recode; 00070 int length; 00071 } TM2Codes; 00072 00076 typedef struct TM2Huff{ 00077 int val_bits; 00078 int max_bits; 00079 int min_bits; 00080 int nodes; 00081 int num; 00082 int max_num; 00083 int *nums; 00084 uint32_t *bits; 00085 int *lens; 00086 } TM2Huff; 00087 00088 static int tm2_read_tree(TM2Context *ctx, uint32_t prefix, int length, TM2Huff *huff) 00089 { 00090 if(length > huff->max_bits) { 00091 av_log(ctx->avctx, AV_LOG_ERROR, "Tree exceeded its given depth (%i)\n", huff->max_bits); 00092 return -1; 00093 } 00094 00095 if(!get_bits1(&ctx->gb)) { /* literal */ 00096 if (length == 0) { 00097 length = 1; 00098 } 00099 if(huff->num >= huff->max_num) { 00100 av_log(ctx->avctx, AV_LOG_DEBUG, "Too many literals\n"); 00101 return -1; 00102 } 00103 huff->nums[huff->num] = get_bits_long(&ctx->gb, huff->val_bits); 00104 huff->bits[huff->num] = prefix; 00105 huff->lens[huff->num] = length; 00106 huff->num++; 00107 return 0; 00108 } else { /* non-terminal node */ 00109 if(tm2_read_tree(ctx, prefix << 1, length + 1, huff) == -1) 00110 return -1; 00111 if(tm2_read_tree(ctx, (prefix << 1) | 1, length + 1, huff) == -1) 00112 return -1; 00113 } 00114 return 0; 00115 } 00116 00117 static int tm2_build_huff_table(TM2Context *ctx, TM2Codes *code) 00118 { 00119 TM2Huff huff; 00120 int res = 0; 00121 00122 huff.val_bits = get_bits(&ctx->gb, 5); 00123 huff.max_bits = get_bits(&ctx->gb, 5); 00124 huff.min_bits = get_bits(&ctx->gb, 5); 00125 huff.nodes = get_bits_long(&ctx->gb, 17); 00126 huff.num = 0; 00127 00128 /* check for correct codes parameters */ 00129 if((huff.val_bits < 1) || (huff.val_bits > 32) || 00130 (huff.max_bits < 0) || (huff.max_bits > 32)) { 00131 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect tree parameters - literal length: %i, max code length: %i\n", 00132 huff.val_bits, huff.max_bits); 00133 return -1; 00134 } 00135 if((huff.nodes < 0) || (huff.nodes > 0x10000)) { 00136 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of Huffman tree nodes: %i\n", huff.nodes); 00137 return -1; 00138 } 00139 /* one-node tree */ 00140 if(huff.max_bits == 0) 00141 huff.max_bits = 1; 00142 00143 /* allocate space for codes - it is exactly ceil(nodes / 2) entries */ 00144 huff.max_num = (huff.nodes + 1) >> 1; 00145 huff.nums = av_mallocz(huff.max_num * sizeof(int)); 00146 huff.bits = av_mallocz(huff.max_num * sizeof(uint32_t)); 00147 huff.lens = av_mallocz(huff.max_num * sizeof(int)); 00148 00149 if(tm2_read_tree(ctx, 0, 0, &huff) == -1) 00150 res = -1; 00151 00152 if(huff.num != huff.max_num) { 00153 av_log(ctx->avctx, AV_LOG_ERROR, "Got less codes than expected: %i of %i\n", 00154 huff.num, huff.max_num); 00155 res = -1; 00156 } 00157 00158 /* convert codes to vlc_table */ 00159 if(res != -1) { 00160 int i; 00161 00162 res = init_vlc(&code->vlc, huff.max_bits, huff.max_num, 00163 huff.lens, sizeof(int), sizeof(int), 00164 huff.bits, sizeof(uint32_t), sizeof(uint32_t), 0); 00165 if(res < 0) { 00166 av_log(ctx->avctx, AV_LOG_ERROR, "Cannot build VLC table\n"); 00167 res = -1; 00168 } else 00169 res = 0; 00170 if(res != -1) { 00171 code->bits = huff.max_bits; 00172 code->length = huff.max_num; 00173 code->recode = av_malloc(code->length * sizeof(int)); 00174 for(i = 0; i < code->length; i++) 00175 code->recode[i] = huff.nums[i]; 00176 } 00177 } 00178 /* free allocated memory */ 00179 av_free(huff.nums); 00180 av_free(huff.bits); 00181 av_free(huff.lens); 00182 00183 return res; 00184 } 00185 00186 static void tm2_free_codes(TM2Codes *code) 00187 { 00188 av_free(code->recode); 00189 if(code->vlc.table) 00190 free_vlc(&code->vlc); 00191 } 00192 00193 static inline int tm2_get_token(GetBitContext *gb, TM2Codes *code) 00194 { 00195 int val; 00196 val = get_vlc2(gb, code->vlc.table, code->bits, 1); 00197 return code->recode[val]; 00198 } 00199 00200 static inline int tm2_read_header(TM2Context *ctx, const uint8_t *buf) 00201 { 00202 uint32_t magic; 00203 const uint8_t *obuf; 00204 00205 obuf = buf; 00206 00207 magic = AV_RL32(buf); 00208 buf += 4; 00209 00210 if(magic == 0x00000100) { /* old header */ 00211 /* av_log (ctx->avctx, AV_LOG_ERROR, "TM2 old header: not implemented (yet)\n"); */ 00212 return 40; 00213 } else if(magic == 0x00000101) { /* new header */ 00214 return 40; 00215 } else { 00216 av_log (ctx->avctx, AV_LOG_ERROR, "Not a TM2 header: 0x%08X\n", magic); 00217 return -1; 00218 } 00219 00220 return buf - obuf; 00221 } 00222 00223 static int tm2_read_deltas(TM2Context *ctx, int stream_id) { 00224 int d, mb; 00225 int i, v; 00226 00227 d = get_bits(&ctx->gb, 9); 00228 mb = get_bits(&ctx->gb, 5); 00229 00230 if((d < 1) || (d > TM2_DELTAS) || (mb < 1) || (mb > 32)) { 00231 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect delta table: %i deltas x %i bits\n", d, mb); 00232 return -1; 00233 } 00234 00235 for(i = 0; i < d; i++) { 00236 v = get_bits_long(&ctx->gb, mb); 00237 if(v & (1 << (mb - 1))) 00238 ctx->deltas[stream_id][i] = v - (1 << mb); 00239 else 00240 ctx->deltas[stream_id][i] = v; 00241 } 00242 for(; i < TM2_DELTAS; i++) 00243 ctx->deltas[stream_id][i] = 0; 00244 00245 return 0; 00246 } 00247 00248 static int tm2_read_stream(TM2Context *ctx, const uint8_t *buf, int stream_id, int buf_size) 00249 { 00250 int i; 00251 int cur = 0; 00252 int skip = 0; 00253 int len, toks; 00254 TM2Codes codes; 00255 00256 /* get stream length in dwords */ 00257 len = AV_RB32(buf); buf += 4; cur += 4; 00258 skip = len * 4 + 4; 00259 00260 if(len == 0) 00261 return 4; 00262 00263 if (len >= INT_MAX/4-1 || len < 0 || len > buf_size) { 00264 av_log(ctx->avctx, AV_LOG_ERROR, "Error, invalid stream size.\n"); 00265 return -1; 00266 } 00267 00268 toks = AV_RB32(buf); buf += 4; cur += 4; 00269 if(toks & 1) { 00270 len = AV_RB32(buf); buf += 4; cur += 4; 00271 if(len == TM2_ESCAPE) { 00272 len = AV_RB32(buf); buf += 4; cur += 4; 00273 } 00274 if(len > 0) { 00275 init_get_bits(&ctx->gb, buf, (skip - cur) * 8); 00276 if(tm2_read_deltas(ctx, stream_id) == -1) 00277 return -1; 00278 buf += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2; 00279 cur += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2; 00280 } 00281 } 00282 /* skip unused fields */ 00283 if(AV_RB32(buf) == TM2_ESCAPE) { 00284 buf += 4; cur += 4; /* some unknown length - could be escaped too */ 00285 } 00286 buf += 4; cur += 4; 00287 buf += 4; cur += 4; /* unused by decoder */ 00288 00289 init_get_bits(&ctx->gb, buf, (skip - cur) * 8); 00290 if(tm2_build_huff_table(ctx, &codes) == -1) 00291 return -1; 00292 buf += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2; 00293 cur += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2; 00294 00295 toks >>= 1; 00296 /* check if we have sane number of tokens */ 00297 if((toks < 0) || (toks > 0xFFFFFF)){ 00298 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks); 00299 tm2_free_codes(&codes); 00300 return -1; 00301 } 00302 ctx->tokens[stream_id] = av_realloc(ctx->tokens[stream_id], toks * sizeof(int)); 00303 ctx->tok_lens[stream_id] = toks; 00304 len = AV_RB32(buf); buf += 4; cur += 4; 00305 if(len > 0) { 00306 init_get_bits(&ctx->gb, buf, (skip - cur) * 8); 00307 for(i = 0; i < toks; i++) { 00308 if (get_bits_left(&ctx->gb) <= 0) { 00309 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks); 00310 return -1; 00311 } 00312 ctx->tokens[stream_id][i] = tm2_get_token(&ctx->gb, &codes); 00313 } 00314 } else { 00315 for(i = 0; i < toks; i++) 00316 ctx->tokens[stream_id][i] = codes.recode[0]; 00317 } 00318 tm2_free_codes(&codes); 00319 00320 return skip; 00321 } 00322 00323 static inline int GET_TOK(TM2Context *ctx,int type) { 00324 if(ctx->tok_ptrs[type] >= ctx->tok_lens[type]) { 00325 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]); 00326 return 0; 00327 } 00328 if(type <= TM2_MOT) 00329 return ctx->deltas[type][ctx->tokens[type][ctx->tok_ptrs[type]++]]; 00330 return ctx->tokens[type][ctx->tok_ptrs[type]++]; 00331 } 00332 00333 /* blocks decoding routines */ 00334 00335 /* common Y, U, V pointers initialisation */ 00336 #define TM2_INIT_POINTERS() \ 00337 int *last, *clast; \ 00338 int *Y, *U, *V;\ 00339 int Ystride, Ustride, Vstride;\ 00340 \ 00341 Ystride = ctx->avctx->width;\ 00342 Vstride = (ctx->avctx->width + 1) >> 1;\ 00343 Ustride = (ctx->avctx->width + 1) >> 1;\ 00344 Y = (ctx->cur?ctx->Y2:ctx->Y1) + by * 4 * Ystride + bx * 4;\ 00345 V = (ctx->cur?ctx->V2:ctx->V1) + by * 2 * Vstride + bx * 2;\ 00346 U = (ctx->cur?ctx->U2:ctx->U1) + by * 2 * Ustride + bx * 2;\ 00347 last = ctx->last + bx * 4;\ 00348 clast = ctx->clast + bx * 4; 00349 00350 #define TM2_INIT_POINTERS_2() \ 00351 int *Yo, *Uo, *Vo;\ 00352 int oYstride, oUstride, oVstride;\ 00353 \ 00354 TM2_INIT_POINTERS();\ 00355 oYstride = Ystride;\ 00356 oVstride = Vstride;\ 00357 oUstride = Ustride;\ 00358 Yo = (ctx->cur?ctx->Y1:ctx->Y2) + by * 4 * oYstride + bx * 4;\ 00359 Vo = (ctx->cur?ctx->V1:ctx->V2) + by * 2 * oVstride + bx * 2;\ 00360 Uo = (ctx->cur?ctx->U1:ctx->U2) + by * 2 * oUstride + bx * 2; 00361 00362 /* recalculate last and delta values for next blocks */ 00363 #define TM2_RECALC_BLOCK(CHR, stride, last, CD) {\ 00364 CD[0] = CHR[1] - last[1];\ 00365 CD[1] = (int)CHR[stride + 1] - (int)CHR[1];\ 00366 last[0] = (int)CHR[stride + 0];\ 00367 last[1] = (int)CHR[stride + 1];} 00368 00369 /* common operations - add deltas to 4x4 block of luma or 2x2 blocks of chroma */ 00370 static inline void tm2_apply_deltas(TM2Context *ctx, int* Y, int stride, int *deltas, int *last) 00371 { 00372 int ct, d; 00373 int i, j; 00374 00375 for(j = 0; j < 4; j++){ 00376 ct = ctx->D[j]; 00377 for(i = 0; i < 4; i++){ 00378 d = deltas[i + j * 4]; 00379 ct += d; 00380 last[i] += ct; 00381 Y[i] = av_clip_uint8(last[i]); 00382 } 00383 Y += stride; 00384 ctx->D[j] = ct; 00385 } 00386 } 00387 00388 static inline void tm2_high_chroma(int *data, int stride, int *last, int *CD, int *deltas) 00389 { 00390 int i, j; 00391 for(j = 0; j < 2; j++){ 00392 for(i = 0; i < 2; i++){ 00393 CD[j] += deltas[i + j * 2]; 00394 last[i] += CD[j]; 00395 data[i] = last[i]; 00396 } 00397 data += stride; 00398 } 00399 } 00400 00401 static inline void tm2_low_chroma(int *data, int stride, int *clast, int *CD, int *deltas, int bx) 00402 { 00403 int t; 00404 int l; 00405 int prev; 00406 00407 if(bx > 0) 00408 prev = clast[-3]; 00409 else 00410 prev = 0; 00411 t = (CD[0] + CD[1]) >> 1; 00412 l = (prev - CD[0] - CD[1] + clast[1]) >> 1; 00413 CD[1] = CD[0] + CD[1] - t; 00414 CD[0] = t; 00415 clast[0] = l; 00416 00417 tm2_high_chroma(data, stride, clast, CD, deltas); 00418 } 00419 00420 static inline void tm2_hi_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by) 00421 { 00422 int i; 00423 int deltas[16]; 00424 TM2_INIT_POINTERS(); 00425 00426 /* hi-res chroma */ 00427 for(i = 0; i < 4; i++) { 00428 deltas[i] = GET_TOK(ctx, TM2_C_HI); 00429 deltas[i + 4] = GET_TOK(ctx, TM2_C_HI); 00430 } 00431 tm2_high_chroma(U, Ustride, clast, ctx->CD, deltas); 00432 tm2_high_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas + 4); 00433 00434 /* hi-res luma */ 00435 for(i = 0; i < 16; i++) 00436 deltas[i] = GET_TOK(ctx, TM2_L_HI); 00437 00438 tm2_apply_deltas(ctx, Y, Ystride, deltas, last); 00439 } 00440 00441 static inline void tm2_med_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by) 00442 { 00443 int i; 00444 int deltas[16]; 00445 TM2_INIT_POINTERS(); 00446 00447 /* low-res chroma */ 00448 deltas[0] = GET_TOK(ctx, TM2_C_LO); 00449 deltas[1] = deltas[2] = deltas[3] = 0; 00450 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx); 00451 00452 deltas[0] = GET_TOK(ctx, TM2_C_LO); 00453 deltas[1] = deltas[2] = deltas[3] = 0; 00454 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx); 00455 00456 /* hi-res luma */ 00457 for(i = 0; i < 16; i++) 00458 deltas[i] = GET_TOK(ctx, TM2_L_HI); 00459 00460 tm2_apply_deltas(ctx, Y, Ystride, deltas, last); 00461 } 00462 00463 static inline void tm2_low_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by) 00464 { 00465 int i; 00466 int t1, t2; 00467 int deltas[16]; 00468 TM2_INIT_POINTERS(); 00469 00470 /* low-res chroma */ 00471 deltas[0] = GET_TOK(ctx, TM2_C_LO); 00472 deltas[1] = deltas[2] = deltas[3] = 0; 00473 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx); 00474 00475 deltas[0] = GET_TOK(ctx, TM2_C_LO); 00476 deltas[1] = deltas[2] = deltas[3] = 0; 00477 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx); 00478 00479 /* low-res luma */ 00480 for(i = 0; i < 16; i++) 00481 deltas[i] = 0; 00482 00483 deltas[ 0] = GET_TOK(ctx, TM2_L_LO); 00484 deltas[ 2] = GET_TOK(ctx, TM2_L_LO); 00485 deltas[ 8] = GET_TOK(ctx, TM2_L_LO); 00486 deltas[10] = GET_TOK(ctx, TM2_L_LO); 00487 00488 if(bx > 0) 00489 last[0] = (last[-1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3] + last[1]) >> 1; 00490 else 00491 last[0] = (last[1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3])>> 1; 00492 last[2] = (last[1] + last[3]) >> 1; 00493 00494 t1 = ctx->D[0] + ctx->D[1]; 00495 ctx->D[0] = t1 >> 1; 00496 ctx->D[1] = t1 - (t1 >> 1); 00497 t2 = ctx->D[2] + ctx->D[3]; 00498 ctx->D[2] = t2 >> 1; 00499 ctx->D[3] = t2 - (t2 >> 1); 00500 00501 tm2_apply_deltas(ctx, Y, Ystride, deltas, last); 00502 } 00503 00504 static inline void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by) 00505 { 00506 int i; 00507 int ct; 00508 int left, right, diff; 00509 int deltas[16]; 00510 TM2_INIT_POINTERS(); 00511 00512 /* null chroma */ 00513 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0; 00514 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx); 00515 00516 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0; 00517 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx); 00518 00519 /* null luma */ 00520 for(i = 0; i < 16; i++) 00521 deltas[i] = 0; 00522 00523 ct = ctx->D[0] + ctx->D[1] + ctx->D[2] + ctx->D[3]; 00524 00525 if(bx > 0) 00526 left = last[-1] - ct; 00527 else 00528 left = 0; 00529 00530 right = last[3]; 00531 diff = right - left; 00532 last[0] = left + (diff >> 2); 00533 last[1] = left + (diff >> 1); 00534 last[2] = right - (diff >> 2); 00535 last[3] = right; 00536 { 00537 int tp = left; 00538 00539 ctx->D[0] = (tp + (ct >> 2)) - left; 00540 left += ctx->D[0]; 00541 ctx->D[1] = (tp + (ct >> 1)) - left; 00542 left += ctx->D[1]; 00543 ctx->D[2] = ((tp + ct) - (ct >> 2)) - left; 00544 left += ctx->D[2]; 00545 ctx->D[3] = (tp + ct) - left; 00546 } 00547 tm2_apply_deltas(ctx, Y, Ystride, deltas, last); 00548 } 00549 00550 static inline void tm2_still_block(TM2Context *ctx, AVFrame *pic, int bx, int by) 00551 { 00552 int i, j; 00553 TM2_INIT_POINTERS_2(); 00554 00555 /* update chroma */ 00556 for(j = 0; j < 2; j++){ 00557 for(i = 0; i < 2; i++){ 00558 U[i] = Uo[i]; 00559 V[i] = Vo[i]; 00560 } 00561 U += Ustride; V += Vstride; 00562 Uo += oUstride; Vo += oVstride; 00563 } 00564 U -= Ustride * 2; 00565 V -= Vstride * 2; 00566 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD); 00567 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2)); 00568 00569 /* update deltas */ 00570 ctx->D[0] = Yo[3] - last[3]; 00571 ctx->D[1] = Yo[3 + oYstride] - Yo[3]; 00572 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride]; 00573 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2]; 00574 00575 for(j = 0; j < 4; j++){ 00576 for(i = 0; i < 4; i++){ 00577 Y[i] = Yo[i]; 00578 last[i] = Yo[i]; 00579 } 00580 Y += Ystride; 00581 Yo += oYstride; 00582 } 00583 } 00584 00585 static inline void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int by) 00586 { 00587 int i, j; 00588 int d; 00589 TM2_INIT_POINTERS_2(); 00590 00591 /* update chroma */ 00592 for(j = 0; j < 2; j++){ 00593 for(i = 0; i < 2; i++){ 00594 U[i] = Uo[i] + GET_TOK(ctx, TM2_UPD); 00595 V[i] = Vo[i] + GET_TOK(ctx, TM2_UPD); 00596 } 00597 U += Ustride; V += Vstride; 00598 Uo += oUstride; Vo += oVstride; 00599 } 00600 U -= Ustride * 2; 00601 V -= Vstride * 2; 00602 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD); 00603 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2)); 00604 00605 /* update deltas */ 00606 ctx->D[0] = Yo[3] - last[3]; 00607 ctx->D[1] = Yo[3 + oYstride] - Yo[3]; 00608 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride]; 00609 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2]; 00610 00611 for(j = 0; j < 4; j++){ 00612 d = last[3]; 00613 for(i = 0; i < 4; i++){ 00614 Y[i] = Yo[i] + GET_TOK(ctx, TM2_UPD); 00615 last[i] = Y[i]; 00616 } 00617 ctx->D[j] = last[3] - d; 00618 Y += Ystride; 00619 Yo += oYstride; 00620 } 00621 } 00622 00623 static inline void tm2_motion_block(TM2Context *ctx, AVFrame *pic, int bx, int by) 00624 { 00625 int i, j; 00626 int mx, my; 00627 TM2_INIT_POINTERS_2(); 00628 00629 mx = GET_TOK(ctx, TM2_MOT); 00630 my = GET_TOK(ctx, TM2_MOT); 00631 00632 Yo += my * oYstride + mx; 00633 Uo += (my >> 1) * oUstride + (mx >> 1); 00634 Vo += (my >> 1) * oVstride + (mx >> 1); 00635 00636 /* copy chroma */ 00637 for(j = 0; j < 2; j++){ 00638 for(i = 0; i < 2; i++){ 00639 U[i] = Uo[i]; 00640 V[i] = Vo[i]; 00641 } 00642 U += Ustride; V += Vstride; 00643 Uo += oUstride; Vo += oVstride; 00644 } 00645 U -= Ustride * 2; 00646 V -= Vstride * 2; 00647 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD); 00648 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2)); 00649 00650 /* copy luma */ 00651 for(j = 0; j < 4; j++){ 00652 for(i = 0; i < 4; i++){ 00653 Y[i] = Yo[i]; 00654 } 00655 Y += Ystride; 00656 Yo += oYstride; 00657 } 00658 /* calculate deltas */ 00659 Y -= Ystride * 4; 00660 ctx->D[0] = Y[3] - last[3]; 00661 ctx->D[1] = Y[3 + Ystride] - Y[3]; 00662 ctx->D[2] = Y[3 + Ystride * 2] - Y[3 + Ystride]; 00663 ctx->D[3] = Y[3 + Ystride * 3] - Y[3 + Ystride * 2]; 00664 for(i = 0; i < 4; i++) 00665 last[i] = Y[i + Ystride * 3]; 00666 } 00667 00668 static int tm2_decode_blocks(TM2Context *ctx, AVFrame *p) 00669 { 00670 int i, j; 00671 int bw, bh; 00672 int type; 00673 int keyframe = 1; 00674 int *Y, *U, *V; 00675 uint8_t *dst; 00676 00677 bw = ctx->avctx->width >> 2; 00678 bh = ctx->avctx->height >> 2; 00679 00680 for(i = 0; i < TM2_NUM_STREAMS; i++) 00681 ctx->tok_ptrs[i] = 0; 00682 00683 if (ctx->tok_lens[TM2_TYPE]<bw*bh){ 00684 av_log(ctx->avctx,AV_LOG_ERROR,"Got %i tokens for %i blocks\n",ctx->tok_lens[TM2_TYPE],bw*bh); 00685 return -1; 00686 } 00687 00688 memset(ctx->last, 0, 4 * bw * sizeof(int)); 00689 memset(ctx->clast, 0, 4 * bw * sizeof(int)); 00690 00691 for(j = 0; j < bh; j++) { 00692 memset(ctx->D, 0, 4 * sizeof(int)); 00693 memset(ctx->CD, 0, 4 * sizeof(int)); 00694 for(i = 0; i < bw; i++) { 00695 type = GET_TOK(ctx, TM2_TYPE); 00696 switch(type) { 00697 case TM2_HI_RES: 00698 tm2_hi_res_block(ctx, p, i, j); 00699 break; 00700 case TM2_MED_RES: 00701 tm2_med_res_block(ctx, p, i, j); 00702 break; 00703 case TM2_LOW_RES: 00704 tm2_low_res_block(ctx, p, i, j); 00705 break; 00706 case TM2_NULL_RES: 00707 tm2_null_res_block(ctx, p, i, j); 00708 break; 00709 case TM2_UPDATE: 00710 tm2_update_block(ctx, p, i, j); 00711 keyframe = 0; 00712 break; 00713 case TM2_STILL: 00714 tm2_still_block(ctx, p, i, j); 00715 keyframe = 0; 00716 break; 00717 case TM2_MOTION: 00718 tm2_motion_block(ctx, p, i, j); 00719 keyframe = 0; 00720 break; 00721 default: 00722 av_log(ctx->avctx, AV_LOG_ERROR, "Skipping unknown block type %i\n", type); 00723 } 00724 } 00725 } 00726 00727 /* copy data from our buffer to AVFrame */ 00728 Y = (ctx->cur?ctx->Y2:ctx->Y1); 00729 U = (ctx->cur?ctx->U2:ctx->U1); 00730 V = (ctx->cur?ctx->V2:ctx->V1); 00731 dst = p->data[0]; 00732 for(j = 0; j < ctx->avctx->height; j++){ 00733 for(i = 0; i < ctx->avctx->width; i++){ 00734 int y = Y[i], u = U[i >> 1], v = V[i >> 1]; 00735 dst[3*i+0] = av_clip_uint8(y + v); 00736 dst[3*i+1] = av_clip_uint8(y); 00737 dst[3*i+2] = av_clip_uint8(y + u); 00738 } 00739 Y += ctx->avctx->width; 00740 if (j & 1) { 00741 U += ctx->avctx->width >> 1; 00742 V += ctx->avctx->width >> 1; 00743 } 00744 dst += p->linesize[0]; 00745 } 00746 00747 return keyframe; 00748 } 00749 00750 static const int tm2_stream_order[TM2_NUM_STREAMS] = { 00751 TM2_C_HI, TM2_C_LO, TM2_L_HI, TM2_L_LO, TM2_UPD, TM2_MOT, TM2_TYPE 00752 }; 00753 00754 static int decode_frame(AVCodecContext *avctx, 00755 void *data, int *data_size, 00756 AVPacket *avpkt) 00757 { 00758 const uint8_t *buf = avpkt->data; 00759 int buf_size = avpkt->size; 00760 TM2Context * const l = avctx->priv_data; 00761 AVFrame * const p= (AVFrame*)&l->pic; 00762 int i, skip, t; 00763 uint8_t *swbuf; 00764 00765 swbuf = av_malloc(buf_size + FF_INPUT_BUFFER_PADDING_SIZE); 00766 if(!swbuf){ 00767 av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n"); 00768 return -1; 00769 } 00770 p->reference = 1; 00771 p->buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE; 00772 if(avctx->reget_buffer(avctx, p) < 0){ 00773 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); 00774 av_free(swbuf); 00775 return -1; 00776 } 00777 00778 l->dsp.bswap_buf((uint32_t*)swbuf, (const uint32_t*)buf, buf_size >> 2); 00779 skip = tm2_read_header(l, swbuf); 00780 00781 if(skip == -1){ 00782 av_free(swbuf); 00783 return -1; 00784 } 00785 00786 for(i = 0; i < TM2_NUM_STREAMS; i++){ 00787 t = tm2_read_stream(l, swbuf + skip, tm2_stream_order[i], buf_size); 00788 if(t == -1){ 00789 av_free(swbuf); 00790 return -1; 00791 } 00792 skip += t; 00793 } 00794 p->key_frame = tm2_decode_blocks(l, p); 00795 if(p->key_frame) 00796 p->pict_type = AV_PICTURE_TYPE_I; 00797 else 00798 p->pict_type = AV_PICTURE_TYPE_P; 00799 00800 l->cur = !l->cur; 00801 *data_size = sizeof(AVFrame); 00802 *(AVFrame*)data = l->pic; 00803 av_free(swbuf); 00804 00805 return buf_size; 00806 } 00807 00808 static av_cold int decode_init(AVCodecContext *avctx){ 00809 TM2Context * const l = avctx->priv_data; 00810 int i; 00811 00812 if((avctx->width & 3) || (avctx->height & 3)){ 00813 av_log(avctx, AV_LOG_ERROR, "Width and height must be multiple of 4\n"); 00814 return -1; 00815 } 00816 00817 l->avctx = avctx; 00818 l->pic.data[0]=NULL; 00819 avctx->pix_fmt = PIX_FMT_BGR24; 00820 00821 dsputil_init(&l->dsp, avctx); 00822 00823 l->last = av_malloc(4 * sizeof(int) * (avctx->width >> 2)); 00824 l->clast = av_malloc(4 * sizeof(int) * (avctx->width >> 2)); 00825 00826 for(i = 0; i < TM2_NUM_STREAMS; i++) { 00827 l->tokens[i] = NULL; 00828 l->tok_lens[i] = 0; 00829 } 00830 00831 l->Y1 = av_malloc(sizeof(int) * avctx->width * avctx->height); 00832 l->U1 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1)); 00833 l->V1 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1)); 00834 l->Y2 = av_malloc(sizeof(int) * avctx->width * avctx->height); 00835 l->U2 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1)); 00836 l->V2 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1)); 00837 l->cur = 0; 00838 00839 return 0; 00840 } 00841 00842 static av_cold int decode_end(AVCodecContext *avctx){ 00843 TM2Context * const l = avctx->priv_data; 00844 AVFrame *pic = &l->pic; 00845 int i; 00846 00847 av_free(l->last); 00848 av_free(l->clast); 00849 for(i = 0; i < TM2_NUM_STREAMS; i++) 00850 av_free(l->tokens[i]); 00851 if(l->Y1){ 00852 av_free(l->Y1); 00853 av_free(l->U1); 00854 av_free(l->V1); 00855 av_free(l->Y2); 00856 av_free(l->U2); 00857 av_free(l->V2); 00858 } 00859 00860 if (pic->data[0]) 00861 avctx->release_buffer(avctx, pic); 00862 00863 return 0; 00864 } 00865 00866 AVCodec ff_truemotion2_decoder = { 00867 "truemotion2", 00868 AVMEDIA_TYPE_VIDEO, 00869 CODEC_ID_TRUEMOTION2, 00870 sizeof(TM2Context), 00871 decode_init, 00872 NULL, 00873 decode_end, 00874 decode_frame, 00875 CODEC_CAP_DR1, 00876 .long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 2.0"), 00877 };