00001
00002
00003
00004
00005
00006
00007
00008
00009
00010
00011
00012
00013
00014
00015
00016
00017
00018
00019
00020
00021
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
00049 int *tokens[TM2_NUM_STREAMS];
00050 int tok_lens[TM2_NUM_STREAMS];
00051 int tok_ptrs[TM2_NUM_STREAMS];
00052 int deltas[TM2_NUM_STREAMS][TM2_DELTAS];
00053
00054 int D[4];
00055 int CD[4];
00056 int *last;
00057 int *clast;
00058
00059
00060 int *Y1_base, *U1_base, *V1_base, *Y2_base, *U2_base, *V2_base;
00061 int *Y1, *U1, *V1, *Y2, *U2, *V2;
00062 int y_stride, uv_stride;
00063 int cur;
00064 } TM2Context;
00065
00069 typedef struct TM2Codes{
00070 VLC vlc;
00071 int bits;
00072 int *recode;
00073 int length;
00074 } TM2Codes;
00075
00079 typedef struct TM2Huff{
00080 int val_bits;
00081 int max_bits;
00082 int min_bits;
00083 int nodes;
00084 int num;
00085 int max_num;
00086 int *nums;
00087 uint32_t *bits;
00088 int *lens;
00089 } TM2Huff;
00090
00091 static int tm2_read_tree(TM2Context *ctx, uint32_t prefix, int length, TM2Huff *huff)
00092 {
00093 if(length > huff->max_bits) {
00094 av_log(ctx->avctx, AV_LOG_ERROR, "Tree exceeded its given depth (%i)\n", huff->max_bits);
00095 return -1;
00096 }
00097
00098 if(!get_bits1(&ctx->gb)) {
00099 if (length == 0) {
00100 length = 1;
00101 }
00102 if(huff->num >= huff->max_num) {
00103 av_log(ctx->avctx, AV_LOG_DEBUG, "Too many literals\n");
00104 return -1;
00105 }
00106 huff->nums[huff->num] = get_bits_long(&ctx->gb, huff->val_bits);
00107 huff->bits[huff->num] = prefix;
00108 huff->lens[huff->num] = length;
00109 huff->num++;
00110 return 0;
00111 } else {
00112 if(tm2_read_tree(ctx, prefix << 1, length + 1, huff) == -1)
00113 return -1;
00114 if(tm2_read_tree(ctx, (prefix << 1) | 1, length + 1, huff) == -1)
00115 return -1;
00116 }
00117 return 0;
00118 }
00119
00120 static int tm2_build_huff_table(TM2Context *ctx, TM2Codes *code)
00121 {
00122 TM2Huff huff;
00123 int res = 0;
00124
00125 huff.val_bits = get_bits(&ctx->gb, 5);
00126 huff.max_bits = get_bits(&ctx->gb, 5);
00127 huff.min_bits = get_bits(&ctx->gb, 5);
00128 huff.nodes = get_bits_long(&ctx->gb, 17);
00129 huff.num = 0;
00130
00131
00132 if((huff.val_bits < 1) || (huff.val_bits > 32) ||
00133 (huff.max_bits < 0) || (huff.max_bits > 25)) {
00134 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect tree parameters - literal length: %i, max code length: %i\n",
00135 huff.val_bits, huff.max_bits);
00136 return -1;
00137 }
00138 if((huff.nodes <= 0) || (huff.nodes > 0x10000)) {
00139 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of Huffman tree nodes: %i\n", huff.nodes);
00140 return -1;
00141 }
00142
00143 if(huff.max_bits == 0)
00144 huff.max_bits = 1;
00145
00146
00147 huff.max_num = (huff.nodes + 1) >> 1;
00148 huff.nums = av_mallocz(huff.max_num * sizeof(int));
00149 huff.bits = av_mallocz(huff.max_num * sizeof(uint32_t));
00150 huff.lens = av_mallocz(huff.max_num * sizeof(int));
00151
00152 if(tm2_read_tree(ctx, 0, 0, &huff) == -1)
00153 res = -1;
00154
00155 if(huff.num != huff.max_num) {
00156 av_log(ctx->avctx, AV_LOG_ERROR, "Got less codes than expected: %i of %i\n",
00157 huff.num, huff.max_num);
00158 res = -1;
00159 }
00160
00161
00162 if(res != -1) {
00163 int i;
00164
00165 res = init_vlc(&code->vlc, huff.max_bits, huff.max_num,
00166 huff.lens, sizeof(int), sizeof(int),
00167 huff.bits, sizeof(uint32_t), sizeof(uint32_t), 0);
00168 if(res < 0) {
00169 av_log(ctx->avctx, AV_LOG_ERROR, "Cannot build VLC table\n");
00170 res = -1;
00171 } else
00172 res = 0;
00173 if(res != -1) {
00174 code->bits = huff.max_bits;
00175 code->length = huff.max_num;
00176 code->recode = av_malloc(code->length * sizeof(int));
00177 for(i = 0; i < code->length; i++)
00178 code->recode[i] = huff.nums[i];
00179 }
00180 }
00181
00182 av_free(huff.nums);
00183 av_free(huff.bits);
00184 av_free(huff.lens);
00185
00186 return res;
00187 }
00188
00189 static void tm2_free_codes(TM2Codes *code)
00190 {
00191 av_free(code->recode);
00192 if(code->vlc.table)
00193 ff_free_vlc(&code->vlc);
00194 }
00195
00196 static inline int tm2_get_token(GetBitContext *gb, TM2Codes *code)
00197 {
00198 int val;
00199 val = get_vlc2(gb, code->vlc.table, code->bits, 1);
00200 return code->recode[val];
00201 }
00202
00203 static inline int tm2_read_header(TM2Context *ctx, const uint8_t *buf)
00204 {
00205 uint32_t magic;
00206 const uint8_t *obuf;
00207
00208 obuf = buf;
00209
00210 magic = AV_RL32(buf);
00211 buf += 4;
00212
00213 if(magic == 0x00000100) {
00214
00215 return 40;
00216 } else if(magic == 0x00000101) {
00217 return 40;
00218 } else {
00219 av_log (ctx->avctx, AV_LOG_ERROR, "Not a TM2 header: 0x%08X\n", magic);
00220 return -1;
00221 }
00222
00223 return buf - obuf;
00224 }
00225
00226 static int tm2_read_deltas(TM2Context *ctx, int stream_id) {
00227 int d, mb;
00228 int i, v;
00229
00230 d = get_bits(&ctx->gb, 9);
00231 mb = get_bits(&ctx->gb, 5);
00232
00233 if((d < 1) || (d > TM2_DELTAS) || (mb < 1) || (mb > 32)) {
00234 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect delta table: %i deltas x %i bits\n", d, mb);
00235 return -1;
00236 }
00237
00238 for(i = 0; i < d; i++) {
00239 v = get_bits_long(&ctx->gb, mb);
00240 if(v & (1 << (mb - 1)))
00241 ctx->deltas[stream_id][i] = v - (1 << mb);
00242 else
00243 ctx->deltas[stream_id][i] = v;
00244 }
00245 for(; i < TM2_DELTAS; i++)
00246 ctx->deltas[stream_id][i] = 0;
00247
00248 return 0;
00249 }
00250
00251 static int tm2_read_stream(TM2Context *ctx, const uint8_t *buf, int stream_id, int buf_size)
00252 {
00253 int i;
00254 int skip = 0;
00255 int len, toks, pos;
00256 TM2Codes codes;
00257 GetByteContext gb;
00258
00259
00260 bytestream2_init(&gb, buf, buf_size);
00261 len = bytestream2_get_be32(&gb);
00262 skip = len * 4 + 4;
00263
00264 if(len == 0)
00265 return 4;
00266
00267 if (len >= INT_MAX/4-1 || len < 0 || len > buf_size) {
00268 av_log(ctx->avctx, AV_LOG_ERROR, "Error, invalid stream size.\n");
00269 return -1;
00270 }
00271
00272 toks = bytestream2_get_be32(&gb);
00273 if(toks & 1) {
00274 len = bytestream2_get_be32(&gb);
00275 if(len == TM2_ESCAPE) {
00276 len = bytestream2_get_be32(&gb);
00277 }
00278 if(len > 0) {
00279 pos = bytestream2_tell(&gb);
00280 if (skip <= pos)
00281 return -1;
00282 init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
00283 if(tm2_read_deltas(ctx, stream_id) == -1)
00284 return -1;
00285 bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2);
00286 }
00287 }
00288
00289 len = bytestream2_get_be32(&gb);
00290 if(len == TM2_ESCAPE) {
00291 bytestream2_skip(&gb, 8);
00292 } else {
00293 bytestream2_skip(&gb, 4);
00294 }
00295
00296 pos = bytestream2_tell(&gb);
00297 if (skip <= pos)
00298 return -1;
00299 init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
00300 if(tm2_build_huff_table(ctx, &codes) == -1)
00301 return -1;
00302 bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2);
00303
00304 toks >>= 1;
00305
00306 if((toks < 0) || (toks > 0xFFFFFF)){
00307 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
00308 tm2_free_codes(&codes);
00309 return -1;
00310 }
00311 ctx->tokens[stream_id] = av_realloc(ctx->tokens[stream_id], toks * sizeof(int));
00312 ctx->tok_lens[stream_id] = toks;
00313 len = bytestream2_get_be32(&gb);
00314 if(len > 0) {
00315 pos = bytestream2_tell(&gb);
00316 if (skip <= pos)
00317 return -1;
00318 init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
00319 for(i = 0; i < toks; i++) {
00320 if (get_bits_left(&ctx->gb) <= 0) {
00321 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
00322 return -1;
00323 }
00324 ctx->tokens[stream_id][i] = tm2_get_token(&ctx->gb, &codes);
00325 if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS) {
00326 av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n",
00327 ctx->tokens[stream_id][i], stream_id, i);
00328 return AVERROR_INVALIDDATA;
00329 }
00330 }
00331 } else {
00332 for(i = 0; i < toks; i++) {
00333 ctx->tokens[stream_id][i] = codes.recode[0];
00334 if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS) {
00335 av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n",
00336 ctx->tokens[stream_id][i], stream_id, i);
00337 return AVERROR_INVALIDDATA;
00338 }
00339 }
00340 }
00341 tm2_free_codes(&codes);
00342
00343 return skip;
00344 }
00345
00346 static inline int GET_TOK(TM2Context *ctx,int type) {
00347 if(ctx->tok_ptrs[type] >= ctx->tok_lens[type]) {
00348 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]);
00349 return 0;
00350 }
00351 if(type <= TM2_MOT)
00352 return ctx->deltas[type][ctx->tokens[type][ctx->tok_ptrs[type]++]];
00353 return ctx->tokens[type][ctx->tok_ptrs[type]++];
00354 }
00355
00356
00357
00358
00359 #define TM2_INIT_POINTERS() \
00360 int *last, *clast; \
00361 int *Y, *U, *V;\
00362 int Ystride, Ustride, Vstride;\
00363 \
00364 Ystride = ctx->y_stride;\
00365 Vstride = ctx->uv_stride;\
00366 Ustride = ctx->uv_stride;\
00367 Y = (ctx->cur?ctx->Y2:ctx->Y1) + by * 4 * Ystride + bx * 4;\
00368 V = (ctx->cur?ctx->V2:ctx->V1) + by * 2 * Vstride + bx * 2;\
00369 U = (ctx->cur?ctx->U2:ctx->U1) + by * 2 * Ustride + bx * 2;\
00370 last = ctx->last + bx * 4;\
00371 clast = ctx->clast + bx * 4;
00372
00373 #define TM2_INIT_POINTERS_2() \
00374 int *Yo, *Uo, *Vo;\
00375 int oYstride, oUstride, oVstride;\
00376 \
00377 TM2_INIT_POINTERS();\
00378 oYstride = Ystride;\
00379 oVstride = Vstride;\
00380 oUstride = Ustride;\
00381 Yo = (ctx->cur?ctx->Y1:ctx->Y2) + by * 4 * oYstride + bx * 4;\
00382 Vo = (ctx->cur?ctx->V1:ctx->V2) + by * 2 * oVstride + bx * 2;\
00383 Uo = (ctx->cur?ctx->U1:ctx->U2) + by * 2 * oUstride + bx * 2;
00384
00385
00386 #define TM2_RECALC_BLOCK(CHR, stride, last, CD) {\
00387 CD[0] = CHR[1] - last[1];\
00388 CD[1] = (int)CHR[stride + 1] - (int)CHR[1];\
00389 last[0] = (int)CHR[stride + 0];\
00390 last[1] = (int)CHR[stride + 1];}
00391
00392
00393 static inline void tm2_apply_deltas(TM2Context *ctx, int* Y, int stride, int *deltas, int *last)
00394 {
00395 int ct, d;
00396 int i, j;
00397
00398 for(j = 0; j < 4; j++){
00399 ct = ctx->D[j];
00400 for(i = 0; i < 4; i++){
00401 d = deltas[i + j * 4];
00402 ct += d;
00403 last[i] += ct;
00404 Y[i] = av_clip_uint8(last[i]);
00405 }
00406 Y += stride;
00407 ctx->D[j] = ct;
00408 }
00409 }
00410
00411 static inline void tm2_high_chroma(int *data, int stride, int *last, int *CD, int *deltas)
00412 {
00413 int i, j;
00414 for(j = 0; j < 2; j++){
00415 for(i = 0; i < 2; i++){
00416 CD[j] += deltas[i + j * 2];
00417 last[i] += CD[j];
00418 data[i] = last[i];
00419 }
00420 data += stride;
00421 }
00422 }
00423
00424 static inline void tm2_low_chroma(int *data, int stride, int *clast, int *CD, int *deltas, int bx)
00425 {
00426 int t;
00427 int l;
00428 int prev;
00429
00430 if(bx > 0)
00431 prev = clast[-3];
00432 else
00433 prev = 0;
00434 t = (CD[0] + CD[1]) >> 1;
00435 l = (prev - CD[0] - CD[1] + clast[1]) >> 1;
00436 CD[1] = CD[0] + CD[1] - t;
00437 CD[0] = t;
00438 clast[0] = l;
00439
00440 tm2_high_chroma(data, stride, clast, CD, deltas);
00441 }
00442
00443 static inline void tm2_hi_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
00444 {
00445 int i;
00446 int deltas[16];
00447 TM2_INIT_POINTERS();
00448
00449
00450 for(i = 0; i < 4; i++) {
00451 deltas[i] = GET_TOK(ctx, TM2_C_HI);
00452 deltas[i + 4] = GET_TOK(ctx, TM2_C_HI);
00453 }
00454 tm2_high_chroma(U, Ustride, clast, ctx->CD, deltas);
00455 tm2_high_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas + 4);
00456
00457
00458 for(i = 0; i < 16; i++)
00459 deltas[i] = GET_TOK(ctx, TM2_L_HI);
00460
00461 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
00462 }
00463
00464 static inline void tm2_med_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
00465 {
00466 int i;
00467 int deltas[16];
00468 TM2_INIT_POINTERS();
00469
00470
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
00480 for(i = 0; i < 16; i++)
00481 deltas[i] = GET_TOK(ctx, TM2_L_HI);
00482
00483 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
00484 }
00485
00486 static inline void tm2_low_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
00487 {
00488 int i;
00489 int t1, t2;
00490 int deltas[16];
00491 TM2_INIT_POINTERS();
00492
00493
00494 deltas[0] = GET_TOK(ctx, TM2_C_LO);
00495 deltas[1] = deltas[2] = deltas[3] = 0;
00496 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
00497
00498 deltas[0] = GET_TOK(ctx, TM2_C_LO);
00499 deltas[1] = deltas[2] = deltas[3] = 0;
00500 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
00501
00502
00503 for(i = 0; i < 16; i++)
00504 deltas[i] = 0;
00505
00506 deltas[ 0] = GET_TOK(ctx, TM2_L_LO);
00507 deltas[ 2] = GET_TOK(ctx, TM2_L_LO);
00508 deltas[ 8] = GET_TOK(ctx, TM2_L_LO);
00509 deltas[10] = GET_TOK(ctx, TM2_L_LO);
00510
00511 if(bx > 0)
00512 last[0] = (last[-1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3] + last[1]) >> 1;
00513 else
00514 last[0] = (last[1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3])>> 1;
00515 last[2] = (last[1] + last[3]) >> 1;
00516
00517 t1 = ctx->D[0] + ctx->D[1];
00518 ctx->D[0] = t1 >> 1;
00519 ctx->D[1] = t1 - (t1 >> 1);
00520 t2 = ctx->D[2] + ctx->D[3];
00521 ctx->D[2] = t2 >> 1;
00522 ctx->D[3] = t2 - (t2 >> 1);
00523
00524 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
00525 }
00526
00527 static inline void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
00528 {
00529 int i;
00530 int ct;
00531 int left, right, diff;
00532 int deltas[16];
00533 TM2_INIT_POINTERS();
00534
00535
00536 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
00537 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
00538
00539 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
00540 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
00541
00542
00543 for(i = 0; i < 16; i++)
00544 deltas[i] = 0;
00545
00546 ct = ctx->D[0] + ctx->D[1] + ctx->D[2] + ctx->D[3];
00547
00548 if(bx > 0)
00549 left = last[-1] - ct;
00550 else
00551 left = 0;
00552
00553 right = last[3];
00554 diff = right - left;
00555 last[0] = left + (diff >> 2);
00556 last[1] = left + (diff >> 1);
00557 last[2] = right - (diff >> 2);
00558 last[3] = right;
00559 {
00560 int tp = left;
00561
00562 ctx->D[0] = (tp + (ct >> 2)) - left;
00563 left += ctx->D[0];
00564 ctx->D[1] = (tp + (ct >> 1)) - left;
00565 left += ctx->D[1];
00566 ctx->D[2] = ((tp + ct) - (ct >> 2)) - left;
00567 left += ctx->D[2];
00568 ctx->D[3] = (tp + ct) - left;
00569 }
00570 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
00571 }
00572
00573 static inline void tm2_still_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
00574 {
00575 int i, j;
00576 TM2_INIT_POINTERS_2();
00577
00578
00579 for(j = 0; j < 2; j++){
00580 for(i = 0; i < 2; i++){
00581 U[i] = Uo[i];
00582 V[i] = Vo[i];
00583 }
00584 U += Ustride; V += Vstride;
00585 Uo += oUstride; Vo += oVstride;
00586 }
00587 U -= Ustride * 2;
00588 V -= Vstride * 2;
00589 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
00590 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
00591
00592
00593 ctx->D[0] = Yo[3] - last[3];
00594 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
00595 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
00596 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
00597
00598 for(j = 0; j < 4; j++){
00599 for(i = 0; i < 4; i++){
00600 Y[i] = Yo[i];
00601 last[i] = Yo[i];
00602 }
00603 Y += Ystride;
00604 Yo += oYstride;
00605 }
00606 }
00607
00608 static inline void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
00609 {
00610 int i, j;
00611 int d;
00612 TM2_INIT_POINTERS_2();
00613
00614
00615 for(j = 0; j < 2; j++){
00616 for(i = 0; i < 2; i++){
00617 U[i] = Uo[i] + GET_TOK(ctx, TM2_UPD);
00618 V[i] = Vo[i] + GET_TOK(ctx, TM2_UPD);
00619 }
00620 U += Ustride; V += Vstride;
00621 Uo += oUstride; Vo += oVstride;
00622 }
00623 U -= Ustride * 2;
00624 V -= Vstride * 2;
00625 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
00626 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
00627
00628
00629 ctx->D[0] = Yo[3] - last[3];
00630 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
00631 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
00632 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
00633
00634 for(j = 0; j < 4; j++){
00635 d = last[3];
00636 for(i = 0; i < 4; i++){
00637 Y[i] = Yo[i] + GET_TOK(ctx, TM2_UPD);
00638 last[i] = Y[i];
00639 }
00640 ctx->D[j] = last[3] - d;
00641 Y += Ystride;
00642 Yo += oYstride;
00643 }
00644 }
00645
00646 static inline void tm2_motion_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
00647 {
00648 int i, j;
00649 int mx, my;
00650 TM2_INIT_POINTERS_2();
00651
00652 mx = GET_TOK(ctx, TM2_MOT);
00653 my = GET_TOK(ctx, TM2_MOT);
00654 mx = av_clip(mx, -(bx * 4 + 4), ctx->avctx->width - bx * 4);
00655 my = av_clip(my, -(by * 4 + 4), ctx->avctx->height - by * 4);
00656
00657 Yo += my * oYstride + mx;
00658 Uo += (my >> 1) * oUstride + (mx >> 1);
00659 Vo += (my >> 1) * oVstride + (mx >> 1);
00660
00661
00662 for(j = 0; j < 2; j++){
00663 for(i = 0; i < 2; i++){
00664 U[i] = Uo[i];
00665 V[i] = Vo[i];
00666 }
00667 U += Ustride; V += Vstride;
00668 Uo += oUstride; Vo += oVstride;
00669 }
00670 U -= Ustride * 2;
00671 V -= Vstride * 2;
00672 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
00673 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
00674
00675
00676 for(j = 0; j < 4; j++){
00677 for(i = 0; i < 4; i++){
00678 Y[i] = Yo[i];
00679 }
00680 Y += Ystride;
00681 Yo += oYstride;
00682 }
00683
00684 Y -= Ystride * 4;
00685 ctx->D[0] = Y[3] - last[3];
00686 ctx->D[1] = Y[3 + Ystride] - Y[3];
00687 ctx->D[2] = Y[3 + Ystride * 2] - Y[3 + Ystride];
00688 ctx->D[3] = Y[3 + Ystride * 3] - Y[3 + Ystride * 2];
00689 for(i = 0; i < 4; i++)
00690 last[i] = Y[i + Ystride * 3];
00691 }
00692
00693 static int tm2_decode_blocks(TM2Context *ctx, AVFrame *p)
00694 {
00695 int i, j;
00696 int w = ctx->avctx->width, h = ctx->avctx->height, bw = w >> 2, bh = h >> 2, cw = w >> 1;
00697 int type;
00698 int keyframe = 1;
00699 int *Y, *U, *V;
00700 uint8_t *dst;
00701
00702 for(i = 0; i < TM2_NUM_STREAMS; i++)
00703 ctx->tok_ptrs[i] = 0;
00704
00705 if (ctx->tok_lens[TM2_TYPE]<bw*bh){
00706 av_log(ctx->avctx,AV_LOG_ERROR,"Got %i tokens for %i blocks\n",ctx->tok_lens[TM2_TYPE],bw*bh);
00707 return -1;
00708 }
00709
00710 memset(ctx->last, 0, 4 * bw * sizeof(int));
00711 memset(ctx->clast, 0, 4 * bw * sizeof(int));
00712
00713 for(j = 0; j < bh; j++) {
00714 memset(ctx->D, 0, 4 * sizeof(int));
00715 memset(ctx->CD, 0, 4 * sizeof(int));
00716 for(i = 0; i < bw; i++) {
00717 type = GET_TOK(ctx, TM2_TYPE);
00718 switch(type) {
00719 case TM2_HI_RES:
00720 tm2_hi_res_block(ctx, p, i, j);
00721 break;
00722 case TM2_MED_RES:
00723 tm2_med_res_block(ctx, p, i, j);
00724 break;
00725 case TM2_LOW_RES:
00726 tm2_low_res_block(ctx, p, i, j);
00727 break;
00728 case TM2_NULL_RES:
00729 tm2_null_res_block(ctx, p, i, j);
00730 break;
00731 case TM2_UPDATE:
00732 tm2_update_block(ctx, p, i, j);
00733 keyframe = 0;
00734 break;
00735 case TM2_STILL:
00736 tm2_still_block(ctx, p, i, j);
00737 keyframe = 0;
00738 break;
00739 case TM2_MOTION:
00740 tm2_motion_block(ctx, p, i, j);
00741 keyframe = 0;
00742 break;
00743 default:
00744 av_log(ctx->avctx, AV_LOG_ERROR, "Skipping unknown block type %i\n", type);
00745 }
00746 }
00747 }
00748
00749
00750 Y = (ctx->cur?ctx->Y2:ctx->Y1);
00751 U = (ctx->cur?ctx->U2:ctx->U1);
00752 V = (ctx->cur?ctx->V2:ctx->V1);
00753 dst = p->data[0];
00754 for(j = 0; j < h; j++){
00755 for(i = 0; i < w; i++){
00756 int y = Y[i], u = U[i >> 1], v = V[i >> 1];
00757 dst[3*i+0] = av_clip_uint8(y + v);
00758 dst[3*i+1] = av_clip_uint8(y);
00759 dst[3*i+2] = av_clip_uint8(y + u);
00760 }
00761
00762
00763 Y[-4] = Y[-3] = Y[-2] = Y[-1] = Y[0];
00764 Y[w + 3] = Y[w + 2] = Y[w + 1] = Y[w] = Y[w - 1];
00765
00766
00767 if (j == 0) {
00768 memcpy(Y - 4 - 1 * ctx->y_stride, Y - 4, ctx->y_stride);
00769 memcpy(Y - 4 - 2 * ctx->y_stride, Y - 4, ctx->y_stride);
00770 memcpy(Y - 4 - 3 * ctx->y_stride, Y - 4, ctx->y_stride);
00771 memcpy(Y - 4 - 4 * ctx->y_stride, Y - 4, ctx->y_stride);
00772 } else if (j == h - 1) {
00773 memcpy(Y - 4 + 1 * ctx->y_stride, Y - 4, ctx->y_stride);
00774 memcpy(Y - 4 + 2 * ctx->y_stride, Y - 4, ctx->y_stride);
00775 memcpy(Y - 4 + 3 * ctx->y_stride, Y - 4, ctx->y_stride);
00776 memcpy(Y - 4 + 4 * ctx->y_stride, Y - 4, ctx->y_stride);
00777 }
00778
00779 Y += ctx->y_stride;
00780 if (j & 1) {
00781
00782 U[-2] = U[-1] = U[0];
00783 V[-2] = V[-1] = V[0];
00784 U[cw + 1] = U[cw] = U[cw - 1];
00785 V[cw + 1] = V[cw] = V[cw - 1];
00786
00787
00788 if (j == 1) {
00789 memcpy(U - 2 - 1 * ctx->uv_stride, U - 2, ctx->uv_stride);
00790 memcpy(V - 2 - 1 * ctx->uv_stride, V - 2, ctx->uv_stride);
00791 memcpy(U - 2 - 2 * ctx->uv_stride, U - 2, ctx->uv_stride);
00792 memcpy(V - 2 - 2 * ctx->uv_stride, V - 2, ctx->uv_stride);
00793 } else if (j == h - 1) {
00794 memcpy(U - 2 + 1 * ctx->uv_stride, U - 2, ctx->uv_stride);
00795 memcpy(V - 2 + 1 * ctx->uv_stride, V - 2, ctx->uv_stride);
00796 memcpy(U - 2 + 2 * ctx->uv_stride, U - 2, ctx->uv_stride);
00797 memcpy(V - 2 + 2 * ctx->uv_stride, V - 2, ctx->uv_stride);
00798 }
00799
00800 U += ctx->uv_stride;
00801 V += ctx->uv_stride;
00802 }
00803 dst += p->linesize[0];
00804 }
00805
00806 return keyframe;
00807 }
00808
00809 static const int tm2_stream_order[TM2_NUM_STREAMS] = {
00810 TM2_C_HI, TM2_C_LO, TM2_L_HI, TM2_L_LO, TM2_UPD, TM2_MOT, TM2_TYPE
00811 };
00812
00813 static int decode_frame(AVCodecContext *avctx,
00814 void *data, int *data_size,
00815 AVPacket *avpkt)
00816 {
00817 const uint8_t *buf = avpkt->data;
00818 int buf_size = avpkt->size & ~3;
00819 TM2Context * const l = avctx->priv_data;
00820 AVFrame * const p= (AVFrame*)&l->pic;
00821 int i, skip, t;
00822 uint8_t *swbuf;
00823
00824 swbuf = av_malloc(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
00825 if(!swbuf){
00826 av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n");
00827 return -1;
00828 }
00829 p->reference = 1;
00830 p->buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
00831 if(avctx->reget_buffer(avctx, p) < 0){
00832 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
00833 av_free(swbuf);
00834 return -1;
00835 }
00836
00837 l->dsp.bswap_buf((uint32_t*)swbuf, (const uint32_t*)buf, buf_size >> 2);
00838 skip = tm2_read_header(l, swbuf);
00839
00840 if(skip == -1){
00841 av_free(swbuf);
00842 return -1;
00843 }
00844
00845 for(i = 0; i < TM2_NUM_STREAMS; i++){
00846 if (skip >= buf_size) {
00847 av_free(swbuf);
00848 return AVERROR_INVALIDDATA;
00849 }
00850 t = tm2_read_stream(l, swbuf + skip, tm2_stream_order[i], buf_size - skip);
00851 if(t < 0){
00852 av_free(swbuf);
00853 return t;
00854 }
00855 skip += t;
00856 }
00857 p->key_frame = tm2_decode_blocks(l, p);
00858 if(p->key_frame)
00859 p->pict_type = AV_PICTURE_TYPE_I;
00860 else
00861 p->pict_type = AV_PICTURE_TYPE_P;
00862
00863 l->cur = !l->cur;
00864 *data_size = sizeof(AVFrame);
00865 *(AVFrame*)data = l->pic;
00866 av_free(swbuf);
00867
00868 return buf_size;
00869 }
00870
00871 static av_cold int decode_init(AVCodecContext *avctx){
00872 TM2Context * const l = avctx->priv_data;
00873 int i, w = avctx->width, h = avctx->height;
00874
00875 if((avctx->width & 3) || (avctx->height & 3)){
00876 av_log(avctx, AV_LOG_ERROR, "Width and height must be multiple of 4\n");
00877 return -1;
00878 }
00879
00880 l->avctx = avctx;
00881 l->pic.data[0]=NULL;
00882 avctx->pix_fmt = PIX_FMT_BGR24;
00883
00884 dsputil_init(&l->dsp, avctx);
00885
00886 l->last = av_malloc(4 * sizeof(*l->last) * (w >> 2));
00887 l->clast = av_malloc(4 * sizeof(*l->clast) * (w >> 2));
00888
00889 for(i = 0; i < TM2_NUM_STREAMS; i++) {
00890 l->tokens[i] = NULL;
00891 l->tok_lens[i] = 0;
00892 }
00893
00894 w += 8;
00895 h += 8;
00896 l->Y1_base = av_malloc(sizeof(*l->Y1_base) * w * h);
00897 l->Y2_base = av_malloc(sizeof(*l->Y2_base) * w * h);
00898 l->y_stride = w;
00899 w = (w + 1) >> 1;
00900 h = (h + 1) >> 1;
00901 l->U1_base = av_malloc(sizeof(*l->U1_base) * w * h);
00902 l->V1_base = av_malloc(sizeof(*l->V1_base) * w * h);
00903 l->U2_base = av_malloc(sizeof(*l->U2_base) * w * h);
00904 l->V2_base = av_malloc(sizeof(*l->V1_base) * w * h);
00905 l->uv_stride = w;
00906 l->cur = 0;
00907 if (!l->Y1_base || !l->Y2_base || !l->U1_base ||
00908 !l->V1_base || !l->U2_base || !l->V2_base ||
00909 !l->last || !l->clast) {
00910 av_freep(l->Y1_base);
00911 av_freep(l->Y2_base);
00912 av_freep(l->U1_base);
00913 av_freep(l->U2_base);
00914 av_freep(l->V1_base);
00915 av_freep(l->V2_base);
00916 av_freep(l->last);
00917 av_freep(l->clast);
00918 return AVERROR(ENOMEM);
00919 }
00920 l->Y1 = l->Y1_base + l->y_stride * 4 + 4;
00921 l->Y2 = l->Y2_base + l->y_stride * 4 + 4;
00922 l->U1 = l->U1_base + l->uv_stride * 2 + 2;
00923 l->U2 = l->U2_base + l->uv_stride * 2 + 2;
00924 l->V1 = l->V1_base + l->uv_stride * 2 + 2;
00925 l->V2 = l->V2_base + l->uv_stride * 2 + 2;
00926
00927 return 0;
00928 }
00929
00930 static av_cold int decode_end(AVCodecContext *avctx){
00931 TM2Context * const l = avctx->priv_data;
00932 AVFrame *pic = &l->pic;
00933 int i;
00934
00935 av_free(l->last);
00936 av_free(l->clast);
00937 for(i = 0; i < TM2_NUM_STREAMS; i++)
00938 av_free(l->tokens[i]);
00939 if(l->Y1){
00940 av_free(l->Y1_base);
00941 av_free(l->U1_base);
00942 av_free(l->V1_base);
00943 av_free(l->Y2_base);
00944 av_free(l->U2_base);
00945 av_free(l->V2_base);
00946 }
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 };