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00027 #include "avcodec.h"
00028 #include "bytestream.h"
00029 #include "get_bits.h"
00030 #include "dsputil.h"
00031
00032 #define TM2_ESCAPE 0x80000000
00033 #define TM2_DELTAS 64
00034
00035 enum TM2_STREAMS{ TM2_C_HI = 0, TM2_C_LO, TM2_L_HI, TM2_L_LO,
00036 TM2_UPD, TM2_MOT, TM2_TYPE, TM2_NUM_STREAMS};
00037
00038 enum TM2_BLOCKS{ TM2_HI_RES = 0, TM2_MED_RES, TM2_LOW_RES, TM2_NULL_RES,
00039 TM2_UPDATE, TM2_STILL, TM2_MOTION};
00040
00041 typedef struct TM2Context{
00042 AVCodecContext *avctx;
00043 AVFrame pic;
00044
00045 GetBitContext gb;
00046 DSPContext dsp;
00047
00048 uint8_t *buffer;
00049 int buffer_size;
00050
00051
00052 int *tokens[TM2_NUM_STREAMS];
00053 int tok_lens[TM2_NUM_STREAMS];
00054 int tok_ptrs[TM2_NUM_STREAMS];
00055 int deltas[TM2_NUM_STREAMS][TM2_DELTAS];
00056
00057 int D[4];
00058 int CD[4];
00059 int *last;
00060 int *clast;
00061
00062
00063 int *Y1_base, *U1_base, *V1_base, *Y2_base, *U2_base, *V2_base;
00064 int *Y1, *U1, *V1, *Y2, *U2, *V2;
00065 int y_stride, uv_stride;
00066 int cur;
00067 } TM2Context;
00068
00072 typedef struct TM2Codes{
00073 VLC vlc;
00074 int bits;
00075 int *recode;
00076 int length;
00077 } TM2Codes;
00078
00082 typedef struct TM2Huff{
00083 int val_bits;
00084 int max_bits;
00085 int min_bits;
00086 int nodes;
00087 int num;
00088 int max_num;
00089 int *nums;
00090 uint32_t *bits;
00091 int *lens;
00092 } TM2Huff;
00093
00094 static int tm2_read_tree(TM2Context *ctx, uint32_t prefix, int length, TM2Huff *huff)
00095 {
00096 if(length > huff->max_bits) {
00097 av_log(ctx->avctx, AV_LOG_ERROR, "Tree exceeded its given depth (%i)\n", huff->max_bits);
00098 return -1;
00099 }
00100
00101 if(!get_bits1(&ctx->gb)) {
00102 if (length == 0) {
00103 length = 1;
00104 }
00105 if(huff->num >= huff->max_num) {
00106 av_log(ctx->avctx, AV_LOG_DEBUG, "Too many literals\n");
00107 return -1;
00108 }
00109 huff->nums[huff->num] = get_bits_long(&ctx->gb, huff->val_bits);
00110 huff->bits[huff->num] = prefix;
00111 huff->lens[huff->num] = length;
00112 huff->num++;
00113 return 0;
00114 } else {
00115 if(tm2_read_tree(ctx, prefix << 1, length + 1, huff) == -1)
00116 return -1;
00117 if(tm2_read_tree(ctx, (prefix << 1) | 1, length + 1, huff) == -1)
00118 return -1;
00119 }
00120 return 0;
00121 }
00122
00123 static int tm2_build_huff_table(TM2Context *ctx, TM2Codes *code)
00124 {
00125 TM2Huff huff;
00126 int res = 0;
00127
00128 huff.val_bits = get_bits(&ctx->gb, 5);
00129 huff.max_bits = get_bits(&ctx->gb, 5);
00130 huff.min_bits = get_bits(&ctx->gb, 5);
00131 huff.nodes = get_bits_long(&ctx->gb, 17);
00132 huff.num = 0;
00133
00134
00135 if((huff.val_bits < 1) || (huff.val_bits > 32) ||
00136 (huff.max_bits < 0) || (huff.max_bits > 25)) {
00137 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect tree parameters - literal length: %i, max code length: %i\n",
00138 huff.val_bits, huff.max_bits);
00139 return -1;
00140 }
00141 if((huff.nodes <= 0) || (huff.nodes > 0x10000)) {
00142 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of Huffman tree nodes: %i\n", huff.nodes);
00143 return -1;
00144 }
00145
00146 if(huff.max_bits == 0)
00147 huff.max_bits = 1;
00148
00149
00150 huff.max_num = (huff.nodes + 1) >> 1;
00151 huff.nums = av_mallocz(huff.max_num * sizeof(int));
00152 huff.bits = av_mallocz(huff.max_num * sizeof(uint32_t));
00153 huff.lens = av_mallocz(huff.max_num * sizeof(int));
00154
00155 if(tm2_read_tree(ctx, 0, 0, &huff) == -1)
00156 res = -1;
00157
00158 if(huff.num != huff.max_num) {
00159 av_log(ctx->avctx, AV_LOG_ERROR, "Got less codes than expected: %i of %i\n",
00160 huff.num, huff.max_num);
00161 res = -1;
00162 }
00163
00164
00165 if(res != -1) {
00166 int i;
00167
00168 res = init_vlc(&code->vlc, huff.max_bits, huff.max_num,
00169 huff.lens, sizeof(int), sizeof(int),
00170 huff.bits, sizeof(uint32_t), sizeof(uint32_t), 0);
00171 if(res < 0) {
00172 av_log(ctx->avctx, AV_LOG_ERROR, "Cannot build VLC table\n");
00173 res = -1;
00174 } else
00175 res = 0;
00176 if(res != -1) {
00177 code->bits = huff.max_bits;
00178 code->length = huff.max_num;
00179 code->recode = av_malloc(code->length * sizeof(int));
00180 for(i = 0; i < code->length; i++)
00181 code->recode[i] = huff.nums[i];
00182 }
00183 }
00184
00185 av_free(huff.nums);
00186 av_free(huff.bits);
00187 av_free(huff.lens);
00188
00189 return res;
00190 }
00191
00192 static void tm2_free_codes(TM2Codes *code)
00193 {
00194 av_free(code->recode);
00195 if(code->vlc.table)
00196 free_vlc(&code->vlc);
00197 }
00198
00199 static inline int tm2_get_token(GetBitContext *gb, TM2Codes *code)
00200 {
00201 int val;
00202 val = get_vlc2(gb, code->vlc.table, code->bits, 1);
00203 return code->recode[val];
00204 }
00205
00206 static inline int tm2_read_header(TM2Context *ctx, const uint8_t *buf)
00207 {
00208 uint32_t magic;
00209 const uint8_t *obuf;
00210
00211 obuf = buf;
00212
00213 magic = AV_RL32(buf);
00214 buf += 4;
00215
00216 if(magic == 0x00000100) {
00217
00218 return 40;
00219 } else if(magic == 0x00000101) {
00220 return 40;
00221 } else {
00222 av_log (ctx->avctx, AV_LOG_ERROR, "Not a TM2 header: 0x%08X\n", magic);
00223 return -1;
00224 }
00225
00226 return buf - obuf;
00227 }
00228
00229 static int tm2_read_deltas(TM2Context *ctx, int stream_id) {
00230 int d, mb;
00231 int i, v;
00232
00233 d = get_bits(&ctx->gb, 9);
00234 mb = get_bits(&ctx->gb, 5);
00235
00236 if((d < 1) || (d > TM2_DELTAS) || (mb < 1) || (mb > 32)) {
00237 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect delta table: %i deltas x %i bits\n", d, mb);
00238 return -1;
00239 }
00240
00241 for(i = 0; i < d; i++) {
00242 v = get_bits_long(&ctx->gb, mb);
00243 if(v & (1 << (mb - 1)))
00244 ctx->deltas[stream_id][i] = v - (1 << mb);
00245 else
00246 ctx->deltas[stream_id][i] = v;
00247 }
00248 for(; i < TM2_DELTAS; i++)
00249 ctx->deltas[stream_id][i] = 0;
00250
00251 return 0;
00252 }
00253
00254 static int tm2_read_stream(TM2Context *ctx, const uint8_t *buf, int stream_id, int buf_size)
00255 {
00256 int i;
00257 int skip = 0;
00258 int len, toks, pos;
00259 TM2Codes codes;
00260 GetByteContext gb;
00261
00262
00263 bytestream2_init(&gb, buf, buf_size);
00264 len = bytestream2_get_be32(&gb);
00265 skip = len * 4 + 4;
00266
00267 if(len == 0)
00268 return 4;
00269
00270 if (len >= INT_MAX/4-1 || len < 0 || len > buf_size) {
00271 av_log(ctx->avctx, AV_LOG_ERROR, "Error, invalid stream size.\n");
00272 return -1;
00273 }
00274
00275 toks = bytestream2_get_be32(&gb);
00276 if(toks & 1) {
00277 len = bytestream2_get_be32(&gb);
00278 if(len == TM2_ESCAPE) {
00279 len = bytestream2_get_be32(&gb);
00280 }
00281 if(len > 0) {
00282 pos = bytestream2_tell(&gb);
00283 if (skip <= pos)
00284 return -1;
00285 init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
00286 if(tm2_read_deltas(ctx, stream_id) == -1)
00287 return -1;
00288 bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2);
00289 }
00290 }
00291
00292 len = bytestream2_get_be32(&gb);
00293 if(len == TM2_ESCAPE) {
00294 bytestream2_skip(&gb, 8);
00295 } else {
00296 bytestream2_skip(&gb, 4);
00297 }
00298
00299 pos = bytestream2_tell(&gb);
00300 if (skip <= pos)
00301 return -1;
00302 init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
00303 if(tm2_build_huff_table(ctx, &codes) == -1)
00304 return -1;
00305 bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2);
00306
00307 toks >>= 1;
00308
00309 if((toks < 0) || (toks > 0xFFFFFF)){
00310 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
00311 tm2_free_codes(&codes);
00312 return -1;
00313 }
00314 ctx->tokens[stream_id] = av_realloc(ctx->tokens[stream_id], toks * sizeof(int));
00315 ctx->tok_lens[stream_id] = toks;
00316 len = bytestream2_get_be32(&gb);
00317 if(len > 0) {
00318 pos = bytestream2_tell(&gb);
00319 if (skip <= pos)
00320 return -1;
00321 init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
00322 for(i = 0; i < toks; i++) {
00323 if (get_bits_left(&ctx->gb) <= 0) {
00324 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
00325 return -1;
00326 }
00327 ctx->tokens[stream_id][i] = tm2_get_token(&ctx->gb, &codes);
00328 if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS) {
00329 av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n",
00330 ctx->tokens[stream_id][i], stream_id, i);
00331 return AVERROR_INVALIDDATA;
00332 }
00333 }
00334 } else {
00335 for(i = 0; i < toks; i++) {
00336 ctx->tokens[stream_id][i] = codes.recode[0];
00337 if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS) {
00338 av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n",
00339 ctx->tokens[stream_id][i], stream_id, i);
00340 return AVERROR_INVALIDDATA;
00341 }
00342 }
00343 }
00344 tm2_free_codes(&codes);
00345
00346 return skip;
00347 }
00348
00349 static inline int GET_TOK(TM2Context *ctx,int type) {
00350 if(ctx->tok_ptrs[type] >= ctx->tok_lens[type]) {
00351 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]);
00352 return 0;
00353 }
00354 if(type <= TM2_MOT)
00355 return ctx->deltas[type][ctx->tokens[type][ctx->tok_ptrs[type]++]];
00356 return ctx->tokens[type][ctx->tok_ptrs[type]++];
00357 }
00358
00359
00360
00361
00362 #define TM2_INIT_POINTERS() \
00363 int *last, *clast; \
00364 int *Y, *U, *V;\
00365 int Ystride, Ustride, Vstride;\
00366 \
00367 Ystride = ctx->y_stride;\
00368 Vstride = ctx->uv_stride;\
00369 Ustride = ctx->uv_stride;\
00370 Y = (ctx->cur?ctx->Y2:ctx->Y1) + by * 4 * Ystride + bx * 4;\
00371 V = (ctx->cur?ctx->V2:ctx->V1) + by * 2 * Vstride + bx * 2;\
00372 U = (ctx->cur?ctx->U2:ctx->U1) + by * 2 * Ustride + bx * 2;\
00373 last = ctx->last + bx * 4;\
00374 clast = ctx->clast + bx * 4;
00375
00376 #define TM2_INIT_POINTERS_2() \
00377 int *Yo, *Uo, *Vo;\
00378 int oYstride, oUstride, oVstride;\
00379 \
00380 TM2_INIT_POINTERS();\
00381 oYstride = Ystride;\
00382 oVstride = Vstride;\
00383 oUstride = Ustride;\
00384 Yo = (ctx->cur?ctx->Y1:ctx->Y2) + by * 4 * oYstride + bx * 4;\
00385 Vo = (ctx->cur?ctx->V1:ctx->V2) + by * 2 * oVstride + bx * 2;\
00386 Uo = (ctx->cur?ctx->U1:ctx->U2) + by * 2 * oUstride + bx * 2;
00387
00388
00389 #define TM2_RECALC_BLOCK(CHR, stride, last, CD) {\
00390 CD[0] = CHR[1] - last[1];\
00391 CD[1] = (int)CHR[stride + 1] - (int)CHR[1];\
00392 last[0] = (int)CHR[stride + 0];\
00393 last[1] = (int)CHR[stride + 1];}
00394
00395
00396 static inline void tm2_apply_deltas(TM2Context *ctx, int* Y, int stride, int *deltas, int *last)
00397 {
00398 int ct, d;
00399 int i, j;
00400
00401 for(j = 0; j < 4; j++){
00402 ct = ctx->D[j];
00403 for(i = 0; i < 4; i++){
00404 d = deltas[i + j * 4];
00405 ct += d;
00406 last[i] += ct;
00407 Y[i] = av_clip_uint8(last[i]);
00408 }
00409 Y += stride;
00410 ctx->D[j] = ct;
00411 }
00412 }
00413
00414 static inline void tm2_high_chroma(int *data, int stride, int *last, int *CD, int *deltas)
00415 {
00416 int i, j;
00417 for(j = 0; j < 2; j++){
00418 for(i = 0; i < 2; i++){
00419 CD[j] += deltas[i + j * 2];
00420 last[i] += CD[j];
00421 data[i] = last[i];
00422 }
00423 data += stride;
00424 }
00425 }
00426
00427 static inline void tm2_low_chroma(int *data, int stride, int *clast, int *CD, int *deltas, int bx)
00428 {
00429 int t;
00430 int l;
00431 int prev;
00432
00433 if(bx > 0)
00434 prev = clast[-3];
00435 else
00436 prev = 0;
00437 t = (CD[0] + CD[1]) >> 1;
00438 l = (prev - CD[0] - CD[1] + clast[1]) >> 1;
00439 CD[1] = CD[0] + CD[1] - t;
00440 CD[0] = t;
00441 clast[0] = l;
00442
00443 tm2_high_chroma(data, stride, clast, CD, deltas);
00444 }
00445
00446 static inline void tm2_hi_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
00447 {
00448 int i;
00449 int deltas[16];
00450 TM2_INIT_POINTERS();
00451
00452
00453 for(i = 0; i < 4; i++) {
00454 deltas[i] = GET_TOK(ctx, TM2_C_HI);
00455 deltas[i + 4] = GET_TOK(ctx, TM2_C_HI);
00456 }
00457 tm2_high_chroma(U, Ustride, clast, ctx->CD, deltas);
00458 tm2_high_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas + 4);
00459
00460
00461 for(i = 0; i < 16; i++)
00462 deltas[i] = GET_TOK(ctx, TM2_L_HI);
00463
00464 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
00465 }
00466
00467 static inline void tm2_med_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
00468 {
00469 int i;
00470 int deltas[16];
00471 TM2_INIT_POINTERS();
00472
00473
00474 deltas[0] = GET_TOK(ctx, TM2_C_LO);
00475 deltas[1] = deltas[2] = deltas[3] = 0;
00476 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
00477
00478 deltas[0] = GET_TOK(ctx, TM2_C_LO);
00479 deltas[1] = deltas[2] = deltas[3] = 0;
00480 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
00481
00482
00483 for(i = 0; i < 16; i++)
00484 deltas[i] = GET_TOK(ctx, TM2_L_HI);
00485
00486 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
00487 }
00488
00489 static inline void tm2_low_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
00490 {
00491 int i;
00492 int t1, t2;
00493 int deltas[16];
00494 TM2_INIT_POINTERS();
00495
00496
00497 deltas[0] = GET_TOK(ctx, TM2_C_LO);
00498 deltas[1] = deltas[2] = deltas[3] = 0;
00499 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
00500
00501 deltas[0] = GET_TOK(ctx, TM2_C_LO);
00502 deltas[1] = deltas[2] = deltas[3] = 0;
00503 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
00504
00505
00506 for(i = 0; i < 16; i++)
00507 deltas[i] = 0;
00508
00509 deltas[ 0] = GET_TOK(ctx, TM2_L_LO);
00510 deltas[ 2] = GET_TOK(ctx, TM2_L_LO);
00511 deltas[ 8] = GET_TOK(ctx, TM2_L_LO);
00512 deltas[10] = GET_TOK(ctx, TM2_L_LO);
00513
00514 if(bx > 0)
00515 last[0] = (last[-1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3] + last[1]) >> 1;
00516 else
00517 last[0] = (last[1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3])>> 1;
00518 last[2] = (last[1] + last[3]) >> 1;
00519
00520 t1 = ctx->D[0] + ctx->D[1];
00521 ctx->D[0] = t1 >> 1;
00522 ctx->D[1] = t1 - (t1 >> 1);
00523 t2 = ctx->D[2] + ctx->D[3];
00524 ctx->D[2] = t2 >> 1;
00525 ctx->D[3] = t2 - (t2 >> 1);
00526
00527 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
00528 }
00529
00530 static inline void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
00531 {
00532 int i;
00533 int ct;
00534 int left, right, diff;
00535 int deltas[16];
00536 TM2_INIT_POINTERS();
00537
00538
00539 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
00540 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
00541
00542 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
00543 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
00544
00545
00546 for(i = 0; i < 16; i++)
00547 deltas[i] = 0;
00548
00549 ct = ctx->D[0] + ctx->D[1] + ctx->D[2] + ctx->D[3];
00550
00551 if(bx > 0)
00552 left = last[-1] - ct;
00553 else
00554 left = 0;
00555
00556 right = last[3];
00557 diff = right - left;
00558 last[0] = left + (diff >> 2);
00559 last[1] = left + (diff >> 1);
00560 last[2] = right - (diff >> 2);
00561 last[3] = right;
00562 {
00563 int tp = left;
00564
00565 ctx->D[0] = (tp + (ct >> 2)) - left;
00566 left += ctx->D[0];
00567 ctx->D[1] = (tp + (ct >> 1)) - left;
00568 left += ctx->D[1];
00569 ctx->D[2] = ((tp + ct) - (ct >> 2)) - left;
00570 left += ctx->D[2];
00571 ctx->D[3] = (tp + ct) - left;
00572 }
00573 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
00574 }
00575
00576 static inline void tm2_still_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
00577 {
00578 int i, j;
00579 TM2_INIT_POINTERS_2();
00580
00581
00582 for(j = 0; j < 2; j++){
00583 for(i = 0; i < 2; i++){
00584 U[i] = Uo[i];
00585 V[i] = Vo[i];
00586 }
00587 U += Ustride; V += Vstride;
00588 Uo += oUstride; Vo += oVstride;
00589 }
00590 U -= Ustride * 2;
00591 V -= Vstride * 2;
00592 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
00593 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
00594
00595
00596 ctx->D[0] = Yo[3] - last[3];
00597 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
00598 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
00599 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
00600
00601 for(j = 0; j < 4; j++){
00602 for(i = 0; i < 4; i++){
00603 Y[i] = Yo[i];
00604 last[i] = Yo[i];
00605 }
00606 Y += Ystride;
00607 Yo += oYstride;
00608 }
00609 }
00610
00611 static inline void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
00612 {
00613 int i, j;
00614 int d;
00615 TM2_INIT_POINTERS_2();
00616
00617
00618 for(j = 0; j < 2; j++){
00619 for(i = 0; i < 2; i++){
00620 U[i] = Uo[i] + GET_TOK(ctx, TM2_UPD);
00621 V[i] = Vo[i] + GET_TOK(ctx, TM2_UPD);
00622 }
00623 U += Ustride; V += Vstride;
00624 Uo += oUstride; Vo += oVstride;
00625 }
00626 U -= Ustride * 2;
00627 V -= Vstride * 2;
00628 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
00629 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
00630
00631
00632 ctx->D[0] = Yo[3] - last[3];
00633 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
00634 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
00635 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
00636
00637 for(j = 0; j < 4; j++){
00638 d = last[3];
00639 for(i = 0; i < 4; i++){
00640 Y[i] = Yo[i] + GET_TOK(ctx, TM2_UPD);
00641 last[i] = Y[i];
00642 }
00643 ctx->D[j] = last[3] - d;
00644 Y += Ystride;
00645 Yo += oYstride;
00646 }
00647 }
00648
00649 static inline void tm2_motion_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
00650 {
00651 int i, j;
00652 int mx, my;
00653 TM2_INIT_POINTERS_2();
00654
00655 mx = GET_TOK(ctx, TM2_MOT);
00656 my = GET_TOK(ctx, TM2_MOT);
00657 mx = av_clip(mx, -(bx * 4 + 4), ctx->avctx->width - bx * 4);
00658 my = av_clip(my, -(by * 4 + 4), ctx->avctx->height - by * 4);
00659
00660 Yo += my * oYstride + mx;
00661 Uo += (my >> 1) * oUstride + (mx >> 1);
00662 Vo += (my >> 1) * oVstride + (mx >> 1);
00663
00664
00665 for(j = 0; j < 2; j++){
00666 for(i = 0; i < 2; i++){
00667 U[i] = Uo[i];
00668 V[i] = Vo[i];
00669 }
00670 U += Ustride; V += Vstride;
00671 Uo += oUstride; Vo += oVstride;
00672 }
00673 U -= Ustride * 2;
00674 V -= Vstride * 2;
00675 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
00676 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
00677
00678
00679 for(j = 0; j < 4; j++){
00680 for(i = 0; i < 4; i++){
00681 Y[i] = Yo[i];
00682 }
00683 Y += Ystride;
00684 Yo += oYstride;
00685 }
00686
00687 Y -= Ystride * 4;
00688 ctx->D[0] = Y[3] - last[3];
00689 ctx->D[1] = Y[3 + Ystride] - Y[3];
00690 ctx->D[2] = Y[3 + Ystride * 2] - Y[3 + Ystride];
00691 ctx->D[3] = Y[3 + Ystride * 3] - Y[3 + Ystride * 2];
00692 for(i = 0; i < 4; i++)
00693 last[i] = Y[i + Ystride * 3];
00694 }
00695
00696 static int tm2_decode_blocks(TM2Context *ctx, AVFrame *p)
00697 {
00698 int i, j;
00699 int w = ctx->avctx->width, h = ctx->avctx->height, bw = w >> 2, bh = h >> 2, cw = w >> 1;
00700 int type;
00701 int keyframe = 1;
00702 int *Y, *U, *V;
00703 uint8_t *dst;
00704
00705 for(i = 0; i < TM2_NUM_STREAMS; i++)
00706 ctx->tok_ptrs[i] = 0;
00707
00708 if (ctx->tok_lens[TM2_TYPE]<bw*bh){
00709 av_log(ctx->avctx,AV_LOG_ERROR,"Got %i tokens for %i blocks\n",ctx->tok_lens[TM2_TYPE],bw*bh);
00710 return -1;
00711 }
00712
00713 memset(ctx->last, 0, 4 * bw * sizeof(int));
00714 memset(ctx->clast, 0, 4 * bw * sizeof(int));
00715
00716 for(j = 0; j < bh; j++) {
00717 memset(ctx->D, 0, 4 * sizeof(int));
00718 memset(ctx->CD, 0, 4 * sizeof(int));
00719 for(i = 0; i < bw; i++) {
00720 type = GET_TOK(ctx, TM2_TYPE);
00721 switch(type) {
00722 case TM2_HI_RES:
00723 tm2_hi_res_block(ctx, p, i, j);
00724 break;
00725 case TM2_MED_RES:
00726 tm2_med_res_block(ctx, p, i, j);
00727 break;
00728 case TM2_LOW_RES:
00729 tm2_low_res_block(ctx, p, i, j);
00730 break;
00731 case TM2_NULL_RES:
00732 tm2_null_res_block(ctx, p, i, j);
00733 break;
00734 case TM2_UPDATE:
00735 tm2_update_block(ctx, p, i, j);
00736 keyframe = 0;
00737 break;
00738 case TM2_STILL:
00739 tm2_still_block(ctx, p, i, j);
00740 keyframe = 0;
00741 break;
00742 case TM2_MOTION:
00743 tm2_motion_block(ctx, p, i, j);
00744 keyframe = 0;
00745 break;
00746 default:
00747 av_log(ctx->avctx, AV_LOG_ERROR, "Skipping unknown block type %i\n", type);
00748 }
00749 }
00750 }
00751
00752
00753 Y = (ctx->cur?ctx->Y2:ctx->Y1);
00754 U = (ctx->cur?ctx->U2:ctx->U1);
00755 V = (ctx->cur?ctx->V2:ctx->V1);
00756 dst = p->data[0];
00757 for(j = 0; j < h; j++){
00758 for(i = 0; i < w; i++){
00759 int y = Y[i], u = U[i >> 1], v = V[i >> 1];
00760 dst[3*i+0] = av_clip_uint8(y + v);
00761 dst[3*i+1] = av_clip_uint8(y);
00762 dst[3*i+2] = av_clip_uint8(y + u);
00763 }
00764
00765
00766 Y[-4] = Y[-3] = Y[-2] = Y[-1] = Y[0];
00767 Y[w + 3] = Y[w + 2] = Y[w + 1] = Y[w] = Y[w - 1];
00768
00769
00770 if (j == 0) {
00771 memcpy(Y - 4 - 1 * ctx->y_stride, Y - 4, ctx->y_stride);
00772 memcpy(Y - 4 - 2 * ctx->y_stride, Y - 4, ctx->y_stride);
00773 memcpy(Y - 4 - 3 * ctx->y_stride, Y - 4, ctx->y_stride);
00774 memcpy(Y - 4 - 4 * ctx->y_stride, Y - 4, ctx->y_stride);
00775 } else if (j == h - 1) {
00776 memcpy(Y - 4 + 1 * ctx->y_stride, Y - 4, ctx->y_stride);
00777 memcpy(Y - 4 + 2 * ctx->y_stride, Y - 4, ctx->y_stride);
00778 memcpy(Y - 4 + 3 * ctx->y_stride, Y - 4, ctx->y_stride);
00779 memcpy(Y - 4 + 4 * ctx->y_stride, Y - 4, ctx->y_stride);
00780 }
00781
00782 Y += ctx->y_stride;
00783 if (j & 1) {
00784
00785 U[-2] = U[-1] = U[0];
00786 V[-2] = V[-1] = V[0];
00787 U[cw + 1] = U[cw] = U[cw - 1];
00788 V[cw + 1] = V[cw] = V[cw - 1];
00789
00790
00791 if (j == 1) {
00792 memcpy(U - 2 - 1 * ctx->uv_stride, U - 2, ctx->uv_stride);
00793 memcpy(V - 2 - 1 * ctx->uv_stride, V - 2, ctx->uv_stride);
00794 memcpy(U - 2 - 2 * ctx->uv_stride, U - 2, ctx->uv_stride);
00795 memcpy(V - 2 - 2 * ctx->uv_stride, V - 2, ctx->uv_stride);
00796 } else if (j == h - 1) {
00797 memcpy(U - 2 + 1 * ctx->uv_stride, U - 2, ctx->uv_stride);
00798 memcpy(V - 2 + 1 * ctx->uv_stride, V - 2, ctx->uv_stride);
00799 memcpy(U - 2 + 2 * ctx->uv_stride, U - 2, ctx->uv_stride);
00800 memcpy(V - 2 + 2 * ctx->uv_stride, V - 2, ctx->uv_stride);
00801 }
00802
00803 U += ctx->uv_stride;
00804 V += ctx->uv_stride;
00805 }
00806 dst += p->linesize[0];
00807 }
00808
00809 return keyframe;
00810 }
00811
00812 static const int tm2_stream_order[TM2_NUM_STREAMS] = {
00813 TM2_C_HI, TM2_C_LO, TM2_L_HI, TM2_L_LO, TM2_UPD, TM2_MOT, TM2_TYPE
00814 };
00815
00816 static int decode_frame(AVCodecContext *avctx,
00817 void *data, int *data_size,
00818 AVPacket *avpkt)
00819 {
00820 const uint8_t *buf = avpkt->data;
00821 int buf_size = avpkt->size & ~3;
00822 TM2Context * const l = avctx->priv_data;
00823 AVFrame * const p= (AVFrame*)&l->pic;
00824 int i, skip, t;
00825
00826 av_fast_padded_malloc(&l->buffer, &l->buffer_size, buf_size);
00827 if(!l->buffer){
00828 av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n");
00829 return -1;
00830 }
00831 p->reference = 3;
00832 p->buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
00833 if(avctx->reget_buffer(avctx, p) < 0){
00834 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
00835 return -1;
00836 }
00837
00838 l->dsp.bswap_buf((uint32_t*)l->buffer, (const uint32_t*)buf, buf_size >> 2);
00839 skip = tm2_read_header(l, l->buffer);
00840
00841 if(skip == -1){
00842 return -1;
00843 }
00844
00845 for(i = 0; i < TM2_NUM_STREAMS; i++){
00846 if (skip >= buf_size) {
00847 return AVERROR_INVALIDDATA;
00848 }
00849 t = tm2_read_stream(l, l->buffer + skip, tm2_stream_order[i], buf_size - skip);
00850 if(t < 0){
00851 return t;
00852 }
00853 skip += t;
00854 }
00855 p->key_frame = tm2_decode_blocks(l, p);
00856 if(p->key_frame)
00857 p->pict_type = AV_PICTURE_TYPE_I;
00858 else
00859 p->pict_type = AV_PICTURE_TYPE_P;
00860
00861 l->cur = !l->cur;
00862 *data_size = sizeof(AVFrame);
00863 *(AVFrame*)data = l->pic;
00864
00865 return buf_size;
00866 }
00867
00868 static av_cold int decode_init(AVCodecContext *avctx){
00869 TM2Context * const l = avctx->priv_data;
00870 int i, w = avctx->width, h = avctx->height;
00871
00872 if((avctx->width & 3) || (avctx->height & 3)){
00873 av_log(avctx, AV_LOG_ERROR, "Width and height must be multiple of 4\n");
00874 return -1;
00875 }
00876
00877 l->avctx = avctx;
00878 l->pic.data[0]=NULL;
00879 avctx->pix_fmt = PIX_FMT_BGR24;
00880 avcodec_get_frame_defaults(&l->pic);
00881
00882 dsputil_init(&l->dsp, avctx);
00883
00884 l->last = av_malloc(4 * sizeof(*l->last) * (w >> 2));
00885 l->clast = av_malloc(4 * sizeof(*l->clast) * (w >> 2));
00886
00887 for(i = 0; i < TM2_NUM_STREAMS; i++) {
00888 l->tokens[i] = NULL;
00889 l->tok_lens[i] = 0;
00890 }
00891
00892 w += 8;
00893 h += 8;
00894 l->Y1_base = av_malloc(sizeof(*l->Y1_base) * w * h);
00895 l->Y2_base = av_malloc(sizeof(*l->Y2_base) * w * h);
00896 l->y_stride = w;
00897 w = (w + 1) >> 1;
00898 h = (h + 1) >> 1;
00899 l->U1_base = av_malloc(sizeof(*l->U1_base) * w * h);
00900 l->V1_base = av_malloc(sizeof(*l->V1_base) * w * h);
00901 l->U2_base = av_malloc(sizeof(*l->U2_base) * w * h);
00902 l->V2_base = av_malloc(sizeof(*l->V1_base) * w * h);
00903 l->uv_stride = w;
00904 l->cur = 0;
00905 if (!l->Y1_base || !l->Y2_base || !l->U1_base ||
00906 !l->V1_base || !l->U2_base || !l->V2_base ||
00907 !l->last || !l->clast) {
00908 av_freep(l->Y1_base);
00909 av_freep(l->Y2_base);
00910 av_freep(l->U1_base);
00911 av_freep(l->U2_base);
00912 av_freep(l->V1_base);
00913 av_freep(l->V2_base);
00914 av_freep(l->last);
00915 av_freep(l->clast);
00916 return AVERROR(ENOMEM);
00917 }
00918 l->Y1 = l->Y1_base + l->y_stride * 4 + 4;
00919 l->Y2 = l->Y2_base + l->y_stride * 4 + 4;
00920 l->U1 = l->U1_base + l->uv_stride * 2 + 2;
00921 l->U2 = l->U2_base + l->uv_stride * 2 + 2;
00922 l->V1 = l->V1_base + l->uv_stride * 2 + 2;
00923 l->V2 = l->V2_base + l->uv_stride * 2 + 2;
00924
00925 return 0;
00926 }
00927
00928 static av_cold int decode_end(AVCodecContext *avctx){
00929 TM2Context * const l = avctx->priv_data;
00930 AVFrame *pic = &l->pic;
00931 int i;
00932
00933 av_free(l->last);
00934 av_free(l->clast);
00935 for(i = 0; i < TM2_NUM_STREAMS; i++)
00936 av_free(l->tokens[i]);
00937 if(l->Y1){
00938 av_free(l->Y1_base);
00939 av_free(l->U1_base);
00940 av_free(l->V1_base);
00941 av_free(l->Y2_base);
00942 av_free(l->U2_base);
00943 av_free(l->V2_base);
00944 }
00945 av_freep(&l->buffer);
00946 l->buffer_size = 0;
00947
00948 if (pic->data[0])
00949 avctx->release_buffer(avctx, pic);
00950
00951 return 0;
00952 }
00953
00954 AVCodec ff_truemotion2_decoder = {
00955 .name = "truemotion2",
00956 .type = AVMEDIA_TYPE_VIDEO,
00957 .id = CODEC_ID_TRUEMOTION2,
00958 .priv_data_size = sizeof(TM2Context),
00959 .init = decode_init,
00960 .close = decode_end,
00961 .decode = decode_frame,
00962 .capabilities = CODEC_CAP_DR1,
00963 .long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 2.0"),
00964 };