?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
aarch64: Add assembly support for -fsanitize=hwaddress tagged globals.
[libav.git] / libavcodec / truemotion2.c
blobcc3b0b76e0149fb3e7d7dbda8c06d377cb52467d
1 /*
2 * Duck/ON2 TrueMotion 2 Decoder
3 * Copyright (c) 2005 Konstantin Shishkov
4 *
5 * This file is part of Libav.
6 *
7 * Libav 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 * Libav 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 Libav; 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 "bitstream.h"
31 #include "bswapdsp.h"
32 #include "bytestream.h"
33 #include "internal.h"
34 #include "vlc.h"
35
36 #define TM2_ESCAPE 0x80000000
37 #define TM2_DELTAS 64
38
39 /* Huffman-coded streams of different types of blocks */
40 enum TM2_STREAMS {
41 TM2_C_HI = 0,
42 TM2_C_LO,
43 TM2_L_HI,
44 TM2_L_LO,
45 TM2_UPD,
46 TM2_MOT,
47 TM2_TYPE,
48 TM2_NUM_STREAMS
49 };
50
51 /* Block types */
52 enum TM2_BLOCKS {
53 TM2_HI_RES = 0,
54 TM2_MED_RES,
55 TM2_LOW_RES,
56 TM2_NULL_RES,
57 TM2_UPDATE,
58 TM2_STILL,
59 TM2_MOTION
60 };
61
62 typedef struct TM2Context {
63 AVCodecContext *avctx;
64 AVFrame *pic;
65
66 BitstreamContext bc;
67 BswapDSPContext bdsp;
68
69 /* TM2 streams */
70 int *tokens[TM2_NUM_STREAMS];
71 int tok_lens[TM2_NUM_STREAMS];
72 int tok_ptrs[TM2_NUM_STREAMS];
73 int deltas[TM2_NUM_STREAMS][TM2_DELTAS];
74 /* for blocks decoding */
75 int D[4];
76 int CD[4];
77 int *last;
78 int *clast;
79
80 /* data for current and previous frame */
81 int *Y1_base, *U1_base, *V1_base, *Y2_base, *U2_base, *V2_base;
82 int *Y1, *U1, *V1, *Y2, *U2, *V2;
83 int y_stride, uv_stride;
84 int cur;
85 } TM2Context;
86
87 /**
88 * Huffman codes for each of streams
89 */
90 typedef struct TM2Codes {
91 VLC vlc; ///< table for Libav bitstream reader
92 int bits;
93 int *recode; ///< table for converting from code indexes to values
94 int length;
95 } TM2Codes;
96
97 /**
98 * structure for gathering Huffman codes information
99 */
100 typedef struct TM2Huff {
101 int val_bits; ///< length of literal
102 int max_bits; ///< maximum length of code
103 int min_bits; ///< minimum length of code
104 int nodes; ///< total number of nodes in tree
105 int num; ///< current number filled
106 int max_num; ///< total number of codes
107 int *nums; ///< literals
108 uint32_t *bits; ///< codes
109 int *lens; ///< codelengths
110 } TM2Huff;
111
112 static int tm2_read_tree(TM2Context *ctx, uint32_t prefix, int length, TM2Huff *huff)
113 {
114 int ret;
115 if (length > huff->max_bits) {
116 av_log(ctx->avctx, AV_LOG_ERROR, "Tree exceeded its given depth (%i)\n",
117 huff->max_bits);
118 return AVERROR_INVALIDDATA;
119 }
120
121 if (!bitstream_read_bit(&ctx->bc)) { /* literal */
122 if (length == 0) {
123 length = 1;
124 }
125 if (huff->num >= huff->max_num) {
126 av_log(ctx->avctx, AV_LOG_DEBUG, "Too many literals\n");
127 return AVERROR_INVALIDDATA;
128 }
129 huff->nums[huff->num] = bitstream_read(&ctx->bc, huff->val_bits);
130 huff->bits[huff->num] = prefix;
131 huff->lens[huff->num] = length;
132 huff->num++;
133 return 0;
134 } else { /* non-terminal node */
135 if ((ret = tm2_read_tree(ctx, prefix << 1, length + 1, huff)) < 0)
136 return ret;
137 if ((ret = tm2_read_tree(ctx, (prefix << 1) | 1, length + 1, huff)) < 0)
138 return ret;
139 }
140 return 0;
141 }
142
143 static int tm2_build_huff_table(TM2Context *ctx, TM2Codes *code)
144 {
145 TM2Huff huff;
146 int res = 0;
147
148 huff.val_bits = bitstream_read(&ctx->bc, 5);
149 huff.max_bits = bitstream_read(&ctx->bc, 5);
150 huff.min_bits = bitstream_read(&ctx->bc, 5);
151 huff.nodes = bitstream_read(&ctx->bc, 17);
152 huff.num = 0;
153
154 /* check for correct codes parameters */
155 if ((huff.val_bits < 1) || (huff.val_bits > 32) ||
156 (huff.max_bits < 0) || (huff.max_bits > 25)) {
157 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect tree parameters - literal "
158 "length: %i, max code length: %i\n", huff.val_bits, huff.max_bits);
159 return AVERROR_INVALIDDATA;
160 }
161 if ((huff.nodes <= 0) || (huff.nodes > 0x10000)) {
162 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of Huffman tree "
163 "nodes: %i\n", huff.nodes);
164 return AVERROR_INVALIDDATA;
165 }
166 /* one-node tree */
167 if (huff.max_bits == 0)
168 huff.max_bits = 1;
169
170 /* allocate space for codes - it is exactly ceil(nodes / 2) entries */
171 huff.max_num = (huff.nodes + 1) >> 1;
172 huff.nums = av_mallocz(huff.max_num * sizeof(int));
173 huff.bits = av_mallocz(huff.max_num * sizeof(uint32_t));
174 huff.lens = av_mallocz(huff.max_num * sizeof(int));
175 if (!huff.nums || !huff.bits || !huff.lens) {
176 res = AVERROR(ENOMEM);
177 goto out;
178 }
179
180 res = tm2_read_tree(ctx, 0, 0, &huff);
181
182 if (huff.num != huff.max_num) {
183 av_log(ctx->avctx, AV_LOG_ERROR, "Got less codes than expected: %i of %i\n",
184 huff.num, huff.max_num);
185 res = AVERROR_INVALIDDATA;
186 }
187
188 /* convert codes to vlc_table */
189 if (res >= 0) {
190 int i;
191
192 res = init_vlc(&code->vlc, huff.max_bits, huff.max_num,
193 huff.lens, sizeof(int), sizeof(int),
194 huff.bits, sizeof(uint32_t), sizeof(uint32_t), 0);
195 if (res < 0)
196 av_log(ctx->avctx, AV_LOG_ERROR, "Cannot build VLC table\n");
197 else {
198 code->bits = huff.max_bits;
199 code->length = huff.max_num;
200 code->recode = av_malloc(code->length * sizeof(int));
201 if (!code->recode) {
202 res = AVERROR(ENOMEM);
203 goto out;
204 }
205 for (i = 0; i < code->length; i++)
206 code->recode[i] = huff.nums[i];
207 }
208 }
209
210 out:
211 /* free allocated memory */
212 av_free(huff.nums);
213 av_free(huff.bits);
214 av_free(huff.lens);
215
216 return res;
217 }
218
219 static void tm2_free_codes(TM2Codes *code)
220 {
221 av_free(code->recode);
222 if (code->vlc.table)
223 ff_free_vlc(&code->vlc);
224 }
225
226 static inline int tm2_get_token(BitstreamContext *bc, TM2Codes *code)
227 {
228 int val;
229 val = bitstream_read_vlc(bc, code->vlc.table, code->bits, 1);
230 return code->recode[val];
231 }
232
233 #define TM2_OLD_HEADER_MAGIC 0x00000100
234 #define TM2_NEW_HEADER_MAGIC 0x00000101
235
236 static inline int tm2_read_header(TM2Context *ctx, const uint8_t *buf)
237 {
238 uint32_t magic = AV_RL32(buf);
239
240 switch (magic) {
241 case TM2_OLD_HEADER_MAGIC:
242 avpriv_request_sample(ctx->avctx, "Old TM2 header");
243 return 0;
244 case TM2_NEW_HEADER_MAGIC:
245 return 0;
246 default:
247 av_log(ctx->avctx, AV_LOG_ERROR, "Not a TM2 header: 0x%08"PRIX32"\n",
248 magic);
249 return AVERROR_INVALIDDATA;
250 }
251 }
252
253 static int tm2_read_deltas(TM2Context *ctx, int stream_id)
254 {
255 int d, mb;
256 int i, v;
257
258 d = bitstream_read(&ctx->bc, 9);
259 mb = bitstream_read(&ctx->bc, 5);
260
261 if ((d < 1) || (d > TM2_DELTAS) || (mb < 1) || (mb > 32)) {
262 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect delta table: %i deltas x %i bits\n", d, mb);
263 return AVERROR_INVALIDDATA;
264 }
265
266 for (i = 0; i < d; i++) {
267 v = bitstream_read(&ctx->bc, mb);
268 if (v & (1 << (mb - 1)))
269 ctx->deltas[stream_id][i] = v - (1 << mb);
270 else
271 ctx->deltas[stream_id][i] = v;
272 }
273 for (; i < TM2_DELTAS; i++)
274 ctx->deltas[stream_id][i] = 0;
275
276 return 0;
277 }
278
279 static int tm2_read_stream(TM2Context *ctx, const uint8_t *buf, int stream_id, int buf_size)
280 {
281 int i, ret;
282 int skip = 0;
283 int len, toks, pos;
284 TM2Codes codes;
285 GetByteContext gb;
286
287 /* get stream length in dwords */
288 bytestream2_init(&gb, buf, buf_size);
289 len = bytestream2_get_be32(&gb);
290 skip = len * 4 + 4;
291
292 if (len == 0)
293 return 4;
294
295 if (len >= INT_MAX / 4 - 1 || len < 0 || skip > buf_size) {
296 av_log(ctx->avctx, AV_LOG_ERROR, "Error, invalid stream size.\n");
297 return AVERROR_INVALIDDATA;
298 }
299
300 toks = bytestream2_get_be32(&gb);
301 if (toks & 1) {
302 len = bytestream2_get_be32(&gb);
303 if (len == TM2_ESCAPE) {
304 len = bytestream2_get_be32(&gb);
305 }
306 if (len > 0) {
307 pos = bytestream2_tell(&gb);
308 if (skip <= pos)
309 return AVERROR_INVALIDDATA;
310 bitstream_init8(&ctx->bc, buf + pos, skip - pos);
311 if ((ret = tm2_read_deltas(ctx, stream_id)) < 0)
312 return ret;
313 bytestream2_skip(&gb, ((bitstream_tell(&ctx->bc) + 31) >> 5) << 2);
314 }
315 }
316 /* skip unused fields */
317 len = bytestream2_get_be32(&gb);
318 if (len == TM2_ESCAPE) { /* some unknown length - could be escaped too */
319 bytestream2_skip(&gb, 8); /* unused by decoder */
320 } else {
321 bytestream2_skip(&gb, 4); /* unused by decoder */
322 }
323
324 pos = bytestream2_tell(&gb);
325 if (skip <= pos)
326 return AVERROR_INVALIDDATA;
327 bitstream_init8(&ctx->bc, buf + pos, skip - pos);
328 if ((ret = tm2_build_huff_table(ctx, &codes)) < 0)
329 return ret;
330 bytestream2_skip(&gb, ((bitstream_tell(&ctx->bc) + 31) >> 5) << 2);
331
332 toks >>= 1;
333 /* check if we have sane number of tokens */
334 if ((toks < 0) || (toks > 0xFFFFFF)) {
335 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
336 tm2_free_codes(&codes);
337 return AVERROR_INVALIDDATA;
338 }
339 ctx->tokens[stream_id] = av_realloc(ctx->tokens[stream_id], toks * sizeof(int));
340 ctx->tok_lens[stream_id] = toks;
341 len = bytestream2_get_be32(&gb);
342 if (len > 0) {
343 pos = bytestream2_tell(&gb);
344 if (skip <= pos)
345 return AVERROR_INVALIDDATA;
346 bitstream_init8(&ctx->bc, buf + pos, skip - pos);
347 for (i = 0; i < toks; i++) {
348 if (bitstream_bits_left(&ctx->bc) <= 0) {
349 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
350 return AVERROR_INVALIDDATA;
351 }
352 ctx->tokens[stream_id][i] = tm2_get_token(&ctx->bc, &codes);
353 if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS) {
354 av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n",
355 ctx->tokens[stream_id][i], stream_id, i);
356 return AVERROR_INVALIDDATA;
357 }
358 }
359 } else {
360 for (i = 0; i < toks; i++) {
361 ctx->tokens[stream_id][i] = codes.recode[0];
362 if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS) {
363 av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n",
364 ctx->tokens[stream_id][i], stream_id, i);
365 return AVERROR_INVALIDDATA;
366 }
367 }
368 }
369 tm2_free_codes(&codes);
370
371 return skip;
372 }
373
374 static inline int GET_TOK(TM2Context *ctx,int type)
375 {
376 if (ctx->tok_ptrs[type] >= ctx->tok_lens[type]) {
377 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]);
378 return 0;
379 }
380 if (type <= TM2_MOT)
381 return ctx->deltas[type][ctx->tokens[type][ctx->tok_ptrs[type]++]];
382 return ctx->tokens[type][ctx->tok_ptrs[type]++];
383 }
384
385 /* blocks decoding routines */
386
387 /* common Y, U, V pointers initialisation */
388 #define TM2_INIT_POINTERS() \
389 int *last, *clast; \
390 int *Y, *U, *V;\
391 int Ystride, Ustride, Vstride;\
392 \
393 Ystride = ctx->y_stride;\
394 Vstride = ctx->uv_stride;\
395 Ustride = ctx->uv_stride;\
396 Y = (ctx->cur?ctx->Y2:ctx->Y1) + by * 4 * Ystride + bx * 4;\
397 V = (ctx->cur?ctx->V2:ctx->V1) + by * 2 * Vstride + bx * 2;\
398 U = (ctx->cur?ctx->U2:ctx->U1) + by * 2 * Ustride + bx * 2;\
399 last = ctx->last + bx * 4;\
400 clast = ctx->clast + bx * 4;
401
402 #define TM2_INIT_POINTERS_2() \
403 int *Yo, *Uo, *Vo;\
404 int oYstride, oUstride, oVstride;\
405 \
406 TM2_INIT_POINTERS();\
407 oYstride = Ystride;\
408 oVstride = Vstride;\
409 oUstride = Ustride;\
410 Yo = (ctx->cur?ctx->Y1:ctx->Y2) + by * 4 * oYstride + bx * 4;\
411 Vo = (ctx->cur?ctx->V1:ctx->V2) + by * 2 * oVstride + bx * 2;\
412 Uo = (ctx->cur?ctx->U1:ctx->U2) + by * 2 * oUstride + bx * 2;
413
414 /* recalculate last and delta values for next blocks */
415 #define TM2_RECALC_BLOCK(CHR, stride, last, CD) {\
416 CD[0] = CHR[1] - last[1];\
417 CD[1] = (int)CHR[stride + 1] - (int)CHR[1];\
418 last[0] = (int)CHR[stride + 0];\
419 last[1] = (int)CHR[stride + 1];}
420
421 /* common operations - add deltas to 4x4 block of luma or 2x2 blocks of chroma */
422 static inline void tm2_apply_deltas(TM2Context *ctx, int* Y, int stride, int *deltas, int *last)
423 {
424 int ct, d;
425 int i, j;
426
427 for (j = 0; j < 4; j++){
428 ct = ctx->D[j];
429 for (i = 0; i < 4; i++){
430 d = deltas[i + j * 4];
431 ct += d;
432 last[i] += ct;
433 Y[i] = av_clip_uint8(last[i]);
434 }
435 Y += stride;
436 ctx->D[j] = ct;
437 }
438 }
439
440 static inline void tm2_high_chroma(int *data, int stride, int *last, int *CD, int *deltas)
441 {
442 int i, j;
443 for (j = 0; j < 2; j++) {
444 for (i = 0; i < 2; i++) {
445 CD[j] += deltas[i + j * 2];
446 last[i] += CD[j];
447 data[i] = last[i];
448 }
449 data += stride;
450 }
451 }
452
453 static inline void tm2_low_chroma(int *data, int stride, int *clast, int *CD, int *deltas, int bx)
454 {
455 int t;
456 int l;
457 int prev;
458
459 if (bx > 0)
460 prev = clast[-3];
461 else
462 prev = 0;
463 t = (CD[0] + CD[1]) >> 1;
464 l = (prev - CD[0] - CD[1] + clast[1]) >> 1;
465 CD[1] = CD[0] + CD[1] - t;
466 CD[0] = t;
467 clast[0] = l;
468
469 tm2_high_chroma(data, stride, clast, CD, deltas);
470 }
471
472 static inline void tm2_hi_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
473 {
474 int i;
475 int deltas[16];
476 TM2_INIT_POINTERS();
477
478 /* hi-res chroma */
479 for (i = 0; i < 4; i++) {
480 deltas[i] = GET_TOK(ctx, TM2_C_HI);
481 deltas[i + 4] = GET_TOK(ctx, TM2_C_HI);
482 }
483 tm2_high_chroma(U, Ustride, clast, ctx->CD, deltas);
484 tm2_high_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas + 4);
485
486 /* hi-res luma */
487 for (i = 0; i < 16; i++)
488 deltas[i] = GET_TOK(ctx, TM2_L_HI);
489
490 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
491 }
492
493 static inline void tm2_med_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
494 {
495 int i;
496 int deltas[16];
497 TM2_INIT_POINTERS();
498
499 /* low-res chroma */
500 deltas[0] = GET_TOK(ctx, TM2_C_LO);
501 deltas[1] = deltas[2] = deltas[3] = 0;
502 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
503
504 deltas[0] = GET_TOK(ctx, TM2_C_LO);
505 deltas[1] = deltas[2] = deltas[3] = 0;
506 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
507
508 /* hi-res luma */
509 for (i = 0; i < 16; i++)
510 deltas[i] = GET_TOK(ctx, TM2_L_HI);
511
512 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
513 }
514
515 static inline void tm2_low_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
516 {
517 int i;
518 int t1, t2;
519 int deltas[16];
520 TM2_INIT_POINTERS();
521
522 /* low-res chroma */
523 deltas[0] = GET_TOK(ctx, TM2_C_LO);
524 deltas[1] = deltas[2] = deltas[3] = 0;
525 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
526
527 deltas[0] = GET_TOK(ctx, TM2_C_LO);
528 deltas[1] = deltas[2] = deltas[3] = 0;
529 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
530
531 /* low-res luma */
532 for (i = 0; i < 16; i++)
533 deltas[i] = 0;
534
535 deltas[ 0] = GET_TOK(ctx, TM2_L_LO);
536 deltas[ 2] = GET_TOK(ctx, TM2_L_LO);
537 deltas[ 8] = GET_TOK(ctx, TM2_L_LO);
538 deltas[10] = GET_TOK(ctx, TM2_L_LO);
539
540 if (bx > 0)
541 last[0] = (last[-1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3] + last[1]) >> 1;
542 else
543 last[0] = (last[1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3])>> 1;
544 last[2] = (last[1] + last[3]) >> 1;
545
546 t1 = ctx->D[0] + ctx->D[1];
547 ctx->D[0] = t1 >> 1;
548 ctx->D[1] = t1 - (t1 >> 1);
549 t2 = ctx->D[2] + ctx->D[3];
550 ctx->D[2] = t2 >> 1;
551 ctx->D[3] = t2 - (t2 >> 1);
552
553 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
554 }
555
556 static inline void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
557 {
558 int i;
559 int ct;
560 int left, right, diff;
561 int deltas[16];
562 TM2_INIT_POINTERS();
563
564 /* null chroma */
565 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
566 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
567
568 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
569 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
570
571 /* null luma */
572 for (i = 0; i < 16; i++)
573 deltas[i] = 0;
574
575 ct = ctx->D[0] + ctx->D[1] + ctx->D[2] + ctx->D[3];
576
577 if (bx > 0)
578 left = last[-1] - ct;
579 else
580 left = 0;
581
582 right = last[3];
583 diff = right - left;
584 last[0] = left + (diff >> 2);
585 last[1] = left + (diff >> 1);
586 last[2] = right - (diff >> 2);
587 last[3] = right;
588 {
589 int tp = left;
590
591 ctx->D[0] = (tp + (ct >> 2)) - left;
592 left += ctx->D[0];
593 ctx->D[1] = (tp + (ct >> 1)) - left;
594 left += ctx->D[1];
595 ctx->D[2] = ((tp + ct) - (ct >> 2)) - left;
596 left += ctx->D[2];
597 ctx->D[3] = (tp + ct) - left;
598 }
599 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
600 }
601
602 static inline void tm2_still_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
603 {
604 int i, j;
605 TM2_INIT_POINTERS_2();
606
607 /* update chroma */
608 for (j = 0; j < 2; j++) {
609 for (i = 0; i < 2; i++){
610 U[i] = Uo[i];
611 V[i] = Vo[i];
612 }
613 U += Ustride; V += Vstride;
614 Uo += oUstride; Vo += oVstride;
615 }
616 U -= Ustride * 2;
617 V -= Vstride * 2;
618 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
619 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
620
621 /* update deltas */
622 ctx->D[0] = Yo[3] - last[3];
623 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
624 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
625 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
626
627 for (j = 0; j < 4; j++) {
628 for (i = 0; i < 4; i++) {
629 Y[i] = Yo[i];
630 last[i] = Yo[i];
631 }
632 Y += Ystride;
633 Yo += oYstride;
634 }
635 }
636
637 static inline void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
638 {
639 int i, j;
640 int d;
641 TM2_INIT_POINTERS_2();
642
643 /* update chroma */
644 for (j = 0; j < 2; j++) {
645 for (i = 0; i < 2; i++) {
646 U[i] = Uo[i] + GET_TOK(ctx, TM2_UPD);
647 V[i] = Vo[i] + GET_TOK(ctx, TM2_UPD);
648 }
649 U += Ustride;
650 V += Vstride;
651 Uo += oUstride;
652 Vo += oVstride;
653 }
654 U -= Ustride * 2;
655 V -= Vstride * 2;
656 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
657 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
658
659 /* update deltas */
660 ctx->D[0] = Yo[3] - last[3];
661 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
662 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
663 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
664
665 for (j = 0; j < 4; j++) {
666 d = last[3];
667 for (i = 0; i < 4; i++) {
668 Y[i] = Yo[i] + GET_TOK(ctx, TM2_UPD);
669 last[i] = Y[i];
670 }
671 ctx->D[j] = last[3] - d;
672 Y += Ystride;
673 Yo += oYstride;
674 }
675 }
676
677 static inline void tm2_motion_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
678 {
679 int i, j;
680 int mx, my;
681 TM2_INIT_POINTERS_2();
682
683 mx = GET_TOK(ctx, TM2_MOT);
684 my = GET_TOK(ctx, TM2_MOT);
685 mx = av_clip(mx, -(bx * 4 + 4), ctx->avctx->width - bx * 4);
686 my = av_clip(my, -(by * 4 + 4), ctx->avctx->height - by * 4);
687
688 Yo += my * oYstride + mx;
689 Uo += (my >> 1) * oUstride + (mx >> 1);
690 Vo += (my >> 1) * oVstride + (mx >> 1);
691
692 /* copy chroma */
693 for (j = 0; j < 2; j++) {
694 for (i = 0; i < 2; i++) {
695 U[i] = Uo[i];
696 V[i] = Vo[i];
697 }
698 U += Ustride;
699 V += Vstride;
700 Uo += oUstride;
701 Vo += oVstride;
702 }
703 U -= Ustride * 2;
704 V -= Vstride * 2;
705 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
706 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
707
708 /* copy luma */
709 for (j = 0; j < 4; j++) {
710 for (i = 0; i < 4; i++) {
711 Y[i] = Yo[i];
712 }
713 Y += Ystride;
714 Yo += oYstride;
715 }
716 /* calculate deltas */
717 Y -= Ystride * 4;
718 ctx->D[0] = Y[3] - last[3];
719 ctx->D[1] = Y[3 + Ystride] - Y[3];
720 ctx->D[2] = Y[3 + Ystride * 2] - Y[3 + Ystride];
721 ctx->D[3] = Y[3 + Ystride * 3] - Y[3 + Ystride * 2];
722 for (i = 0; i < 4; i++)
723 last[i] = Y[i + Ystride * 3];
724 }
725
726 static int tm2_decode_blocks(TM2Context *ctx, AVFrame *p)
727 {
728 int i, j;
729 int w = ctx->avctx->width, h = ctx->avctx->height, bw = w >> 2, bh = h >> 2, cw = w >> 1;
730 int type;
731 int keyframe = 1;
732 int *Y, *U, *V;
733 uint8_t *dst;
734
735 for (i = 0; i < TM2_NUM_STREAMS; i++)
736 ctx->tok_ptrs[i] = 0;
737
738 if (ctx->tok_lens[TM2_TYPE]<bw*bh) {
739 av_log(ctx->avctx,AV_LOG_ERROR,"Got %i tokens for %i blocks\n",ctx->tok_lens[TM2_TYPE],bw*bh);
740 return AVERROR_INVALIDDATA;
741 }
742
743 memset(ctx->last, 0, 4 * bw * sizeof(int));
744 memset(ctx->clast, 0, 4 * bw * sizeof(int));
745
746 for (j = 0; j < bh; j++) {
747 memset(ctx->D, 0, 4 * sizeof(int));
748 memset(ctx->CD, 0, 4 * sizeof(int));
749 for (i = 0; i < bw; i++) {
750 type = GET_TOK(ctx, TM2_TYPE);
751 switch(type) {
752 case TM2_HI_RES:
753 tm2_hi_res_block(ctx, p, i, j);
754 break;
755 case TM2_MED_RES:
756 tm2_med_res_block(ctx, p, i, j);
757 break;
758 case TM2_LOW_RES:
759 tm2_low_res_block(ctx, p, i, j);
760 break;
761 case TM2_NULL_RES:
762 tm2_null_res_block(ctx, p, i, j);
763 break;
764 case TM2_UPDATE:
765 tm2_update_block(ctx, p, i, j);
766 keyframe = 0;
767 break;
768 case TM2_STILL:
769 tm2_still_block(ctx, p, i, j);
770 keyframe = 0;
771 break;
772 case TM2_MOTION:
773 tm2_motion_block(ctx, p, i, j);
774 keyframe = 0;
775 break;
776 default:
777 av_log(ctx->avctx, AV_LOG_ERROR, "Skipping unknown block type %i\n", type);
778 }
779 }
780 }
781
782 /* copy data from our buffer to AVFrame */
783 Y = (ctx->cur?ctx->Y2:ctx->Y1);
784 U = (ctx->cur?ctx->U2:ctx->U1);
785 V = (ctx->cur?ctx->V2:ctx->V1);
786 dst = p->data[0];
787 for (j = 0; j < h; j++) {
788 for (i = 0; i < w; i++) {
789 int y = Y[i], u = U[i >> 1], v = V[i >> 1];
790 dst[3*i+0] = av_clip_uint8(y + v);
791 dst[3*i+1] = av_clip_uint8(y);
792 dst[3*i+2] = av_clip_uint8(y + u);
793 }
794
795 /* horizontal edge extension */
796 Y[-4] = Y[-3] = Y[-2] = Y[-1] = Y[0];
797 Y[w + 3] = Y[w + 2] = Y[w + 1] = Y[w] = Y[w - 1];
798
799 /* vertical edge extension */
800 if (j == 0) {
801 memcpy(Y - 4 - 1 * ctx->y_stride, Y - 4, ctx->y_stride);
802 memcpy(Y - 4 - 2 * ctx->y_stride, Y - 4, ctx->y_stride);
803 memcpy(Y - 4 - 3 * ctx->y_stride, Y - 4, ctx->y_stride);
804 memcpy(Y - 4 - 4 * ctx->y_stride, Y - 4, ctx->y_stride);
805 } else if (j == h - 1) {
806 memcpy(Y - 4 + 1 * ctx->y_stride, Y - 4, ctx->y_stride);
807 memcpy(Y - 4 + 2 * ctx->y_stride, Y - 4, ctx->y_stride);
808 memcpy(Y - 4 + 3 * ctx->y_stride, Y - 4, ctx->y_stride);
809 memcpy(Y - 4 + 4 * ctx->y_stride, Y - 4, ctx->y_stride);
810 }
811
812 Y += ctx->y_stride;
813 if (j & 1) {
814 /* horizontal edge extension */
815 U[-2] = U[-1] = U[0];
816 V[-2] = V[-1] = V[0];
817 U[cw + 1] = U[cw] = U[cw - 1];
818 V[cw + 1] = V[cw] = V[cw - 1];
819
820 /* vertical edge extension */
821 if (j == 1) {
822 memcpy(U - 2 - 1 * ctx->uv_stride, U - 2, ctx->uv_stride);
823 memcpy(V - 2 - 1 * ctx->uv_stride, V - 2, ctx->uv_stride);
824 memcpy(U - 2 - 2 * ctx->uv_stride, U - 2, ctx->uv_stride);
825 memcpy(V - 2 - 2 * ctx->uv_stride, V - 2, ctx->uv_stride);
826 } else if (j == h - 1) {
827 memcpy(U - 2 + 1 * ctx->uv_stride, U - 2, ctx->uv_stride);
828 memcpy(V - 2 + 1 * ctx->uv_stride, V - 2, ctx->uv_stride);
829 memcpy(U - 2 + 2 * ctx->uv_stride, U - 2, ctx->uv_stride);
830 memcpy(V - 2 + 2 * ctx->uv_stride, V - 2, ctx->uv_stride);
831 }
832
833 U += ctx->uv_stride;
834 V += ctx->uv_stride;
835 }
836 dst += p->linesize[0];
837 }
838
839 return keyframe;
840 }
841
842 static const int tm2_stream_order[TM2_NUM_STREAMS] = {
843 TM2_C_HI, TM2_C_LO, TM2_L_HI, TM2_L_LO, TM2_UPD, TM2_MOT, TM2_TYPE
844 };
845
846 #define TM2_HEADER_SIZE 40
847
848 static int decode_frame(AVCodecContext *avctx,
849 void *data, int *got_frame,
850 AVPacket *avpkt)
851 {
852 TM2Context * const l = avctx->priv_data;
853 const uint8_t *buf = avpkt->data;
854 int buf_size = avpkt->size & ~3;
855 AVFrame * const p = l->pic;
856 int offset = TM2_HEADER_SIZE;
857 int i, t, ret;
858 uint8_t *swbuf;
859
860 swbuf = av_malloc(buf_size + AV_INPUT_BUFFER_PADDING_SIZE);
861 if (!swbuf) {
862 av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n");
863 return AVERROR(ENOMEM);
864 }
865
866 if ((ret = ff_reget_buffer(avctx, p)) < 0) {
867 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
868 av_free(swbuf);
869 return ret;
870 }
871
872 l->bdsp.bswap_buf((uint32_t *) swbuf, (const uint32_t *) buf,
873 buf_size >> 2);
874
875 if ((ret = tm2_read_header(l, swbuf)) < 0) {
876 av_free(swbuf);
877 return ret;
878 }
879
880 for (i = 0; i < TM2_NUM_STREAMS; i++) {
881 if (offset >= buf_size) {
882 av_free(swbuf);
883 return AVERROR_INVALIDDATA;
884 }
885 t = tm2_read_stream(l, swbuf + offset, tm2_stream_order[i],
886 buf_size - offset);
887 if (t < 0) {
888 av_free(swbuf);
889 return t;
890 }
891 offset += t;
892 }
893 p->key_frame = tm2_decode_blocks(l, p);
894 if (p->key_frame)
895 p->pict_type = AV_PICTURE_TYPE_I;
896 else
897 p->pict_type = AV_PICTURE_TYPE_P;
898
899 l->cur = !l->cur;
900 *got_frame = 1;
901 ret = av_frame_ref(data, l->pic);
902 av_free(swbuf);
903
904 return (ret < 0) ? ret : buf_size;
905 }
906
907 static av_cold int decode_init(AVCodecContext *avctx)
908 {
909 TM2Context * const l = avctx->priv_data;
910 int i, w = avctx->width, h = avctx->height;
911
912 if ((avctx->width & 3) || (avctx->height & 3)) {
913 av_log(avctx, AV_LOG_ERROR, "Width and height must be multiple of 4\n");
914 return AVERROR(EINVAL);
915 }
916
917 l->avctx = avctx;
918 avctx->pix_fmt = AV_PIX_FMT_BGR24;
919
920 l->pic = av_frame_alloc();
921 if (!l->pic)
922 return AVERROR(ENOMEM);
923
924 ff_bswapdsp_init(&l->bdsp);
925
926 l->last = av_malloc(4 * sizeof(*l->last) * (w >> 2));
927 l->clast = av_malloc(4 * sizeof(*l->clast) * (w >> 2));
928
929 for (i = 0; i < TM2_NUM_STREAMS; i++) {
930 l->tokens[i] = NULL;
931 l->tok_lens[i] = 0;
932 }
933
934 w += 8;
935 h += 8;
936 l->Y1_base = av_malloc(sizeof(*l->Y1_base) * w * h);
937 l->Y2_base = av_malloc(sizeof(*l->Y2_base) * w * h);
938 l->y_stride = w;
939 w = (w + 1) >> 1;
940 h = (h + 1) >> 1;
941 l->U1_base = av_malloc(sizeof(*l->U1_base) * w * h);
942 l->V1_base = av_malloc(sizeof(*l->V1_base) * w * h);
943 l->U2_base = av_malloc(sizeof(*l->U2_base) * w * h);
944 l->V2_base = av_malloc(sizeof(*l->V1_base) * w * h);
945 l->uv_stride = w;
946 l->cur = 0;
947 if (!l->Y1_base || !l->Y2_base || !l->U1_base ||
948 !l->V1_base || !l->U2_base || !l->V2_base ||
949 !l->last || !l->clast) {
950 av_freep(&l->Y1_base);
951 av_freep(&l->Y2_base);
952 av_freep(&l->U1_base);
953 av_freep(&l->U2_base);
954 av_freep(&l->V1_base);
955 av_freep(&l->V2_base);
956 av_freep(&l->last);
957 av_freep(&l->clast);
958 return AVERROR(ENOMEM);
959 }
960 l->Y1 = l->Y1_base + l->y_stride * 4 + 4;
961 l->Y2 = l->Y2_base + l->y_stride * 4 + 4;
962 l->U1 = l->U1_base + l->uv_stride * 2 + 2;
963 l->U2 = l->U2_base + l->uv_stride * 2 + 2;
964 l->V1 = l->V1_base + l->uv_stride * 2 + 2;
965 l->V2 = l->V2_base + l->uv_stride * 2 + 2;
966
967 return 0;
968 }
969
970 static av_cold int decode_end(AVCodecContext *avctx)
971 {
972 TM2Context * const l = avctx->priv_data;
973 int i;
974
975 av_free(l->last);
976 av_free(l->clast);
977 for (i = 0; i < TM2_NUM_STREAMS; i++)
978 av_free(l->tokens[i]);
979 if (l->Y1) {
980 av_free(l->Y1_base);
981 av_free(l->U1_base);
982 av_free(l->V1_base);
983 av_free(l->Y2_base);
984 av_free(l->U2_base);
985 av_free(l->V2_base);
986 }
987
988 av_frame_free(&l->pic);
989
990 return 0;
991 }
992
993 AVCodec ff_truemotion2_decoder = {
994 .name = "truemotion2",
995 .long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 2.0"),
996 .type = AVMEDIA_TYPE_VIDEO,
997 .id = AV_CODEC_ID_TRUEMOTION2,
998 .priv_data_size = sizeof(TM2Context),
999 .init = decode_init,
1000 .close = decode_end,
1001 .decode = decode_frame,
1002 .capabilities = AV_CODEC_CAP_DR1,
1003 };
Modern FFMPEG