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Imported Debian version 2.5.0~trusty1.1
[deb_ffmpeg.git] / ffmpeg / libavcodec / truemotion2.c
CommitLineData
2ba45a60
DM		 1/*
2 * Duck/ON2 TrueMotion 2 Decoder
3 * Copyright (c) 2005 Konstantin Shishkov
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22/**
23 * @file
24 * Duck TrueMotion2 decoder.
25 */
26
27#include <inttypes.h>
28
29#include "avcodec.h"
30#include "bswapdsp.h"
31#include "bytestream.h"
32#include "get_bits.h"
33#include "internal.h"
34
35#define TM2_ESCAPE 0x80000000
36#define TM2_DELTAS 64
37
38/* Huffman-coded streams of different types of blocks */
39enum TM2_STREAMS {
40 TM2_C_HI = 0,
41 TM2_C_LO,
42 TM2_L_HI,
43 TM2_L_LO,
44 TM2_UPD,
45 TM2_MOT,
46 TM2_TYPE,
47 TM2_NUM_STREAMS
48};
49
50/* Block types */
51enum TM2_BLOCKS {
52 TM2_HI_RES = 0,
53 TM2_MED_RES,
54 TM2_LOW_RES,
55 TM2_NULL_RES,
56 TM2_UPDATE,
57 TM2_STILL,
58 TM2_MOTION
59};
60
61typedef struct TM2Context {
62 AVCodecContext *avctx;
63 AVFrame *pic;
64
65 GetBitContext gb;
66 BswapDSPContext bdsp;
67
68 uint8_t *buffer;
69 int buffer_size;
70
71 /* TM2 streams */
72 int *tokens[TM2_NUM_STREAMS];
73 int tok_lens[TM2_NUM_STREAMS];
74 int tok_ptrs[TM2_NUM_STREAMS];
75 int deltas[TM2_NUM_STREAMS][TM2_DELTAS];
76 /* for blocks decoding */
77 int D[4];
78 int CD[4];
79 int *last;
80 int *clast;
81
82 /* data for current and previous frame */
83 int *Y1_base, *U1_base, *V1_base, *Y2_base, *U2_base, *V2_base;
84 int *Y1, *U1, *V1, *Y2, *U2, *V2;
85 int y_stride, uv_stride;
86 int cur;
87} TM2Context;
88
89/**
90* Huffman codes for each of streams
91*/
92typedef struct TM2Codes {
93 VLC vlc; ///< table for FFmpeg bitstream reader
94 int bits;
95 int *recode; ///< table for converting from code indexes to values
96 int length;
97} TM2Codes;
98
99/**
100* structure for gathering Huffman codes information
101*/
102typedef struct TM2Huff {
103 int val_bits; ///< length of literal
104 int max_bits; ///< maximum length of code
105 int min_bits; ///< minimum length of code
106 int nodes; ///< total number of nodes in tree
107 int num; ///< current number filled
108 int max_num; ///< total number of codes
109 int *nums; ///< literals
110 uint32_t *bits; ///< codes
111 int *lens; ///< codelengths
112} TM2Huff;
113
114static int tm2_read_tree(TM2Context *ctx, uint32_t prefix, int length, TM2Huff *huff)
115{
116 int ret;
117 if (length > huff->max_bits) {
118 av_log(ctx->avctx, AV_LOG_ERROR, "Tree exceeded its given depth (%i)\n",
119 huff->max_bits);
120 return AVERROR_INVALIDDATA;
121 }
122
123 if (!get_bits1(&ctx->gb)) { /* literal */
124 if (length == 0) {
125 length = 1;
126 }
127 if (huff->num >= huff->max_num) {
128 av_log(ctx->avctx, AV_LOG_DEBUG, "Too many literals\n");
129 return AVERROR_INVALIDDATA;
130 }
131 huff->nums[huff->num] = get_bits_long(&ctx->gb, huff->val_bits);
132 huff->bits[huff->num] = prefix;
133 huff->lens[huff->num] = length;
134 huff->num++;
135 return 0;
136 } else { /* non-terminal node */
137 if ((ret = tm2_read_tree(ctx, prefix << 1, length + 1, huff)) < 0)
138 return ret;
139 if ((ret = tm2_read_tree(ctx, (prefix << 1) | 1, length + 1, huff)) < 0)
140 return ret;
141 }
142 return 0;
143}
144
145static int tm2_build_huff_table(TM2Context *ctx, TM2Codes *code)
146{
147 TM2Huff huff;
148 int res = 0;
149
150 huff.val_bits = get_bits(&ctx->gb, 5);
151 huff.max_bits = get_bits(&ctx->gb, 5);
152 huff.min_bits = get_bits(&ctx->gb, 5);
153 huff.nodes = get_bits_long(&ctx->gb, 17);
154 huff.num = 0;
155
156 /* check for correct codes parameters */
157 if ((huff.val_bits < 1) || (huff.val_bits > 32) ||
158 (huff.max_bits < 0) || (huff.max_bits > 25)) {
159 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect tree parameters - literal "
160 "length: %i, max code length: %i\n", huff.val_bits, huff.max_bits);
161 return AVERROR_INVALIDDATA;
162 }
163 if ((huff.nodes <= 0) || (huff.nodes > 0x10000)) {
164 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of Huffman tree "
165 "nodes: %i\n", huff.nodes);
166 return AVERROR_INVALIDDATA;
167 }
168 /* one-node tree */
169 if (huff.max_bits == 0)
170 huff.max_bits = 1;
171
172 /* allocate space for codes - it is exactly ceil(nodes / 2) entries */
173 huff.max_num = (huff.nodes + 1) >> 1;
174 huff.nums = av_calloc(huff.max_num, sizeof(int));
175 huff.bits = av_calloc(huff.max_num, sizeof(uint32_t));
176 huff.lens = av_calloc(huff.max_num, sizeof(int));
177
178 if (!huff.nums || !huff.bits || !huff.lens) {
179 res = AVERROR(ENOMEM);
180 goto fail;
181 }
182
183 res = tm2_read_tree(ctx, 0, 0, &huff);
184
185 if (huff.num != huff.max_num) {
186 av_log(ctx->avctx, AV_LOG_ERROR, "Got less codes than expected: %i of %i\n",
187 huff.num, huff.max_num);
188 res = AVERROR_INVALIDDATA;
189 }
190
191 /* convert codes to vlc_table */
192 if (res >= 0) {
193 int i;
194
195 res = init_vlc(&code->vlc, huff.max_bits, huff.max_num,
196 huff.lens, sizeof(int), sizeof(int),
197 huff.bits, sizeof(uint32_t), sizeof(uint32_t), 0);
198 if (res < 0)
199 av_log(ctx->avctx, AV_LOG_ERROR, "Cannot build VLC table\n");
200 else {
201 code->bits = huff.max_bits;
202 code->length = huff.max_num;
203 code->recode = av_malloc_array(code->length, sizeof(int));
204 if (!code->recode) {
205 res = AVERROR(ENOMEM);
206 goto fail;
207 }
208 for (i = 0; i < code->length; i++)
209 code->recode[i] = huff.nums[i];
210 }
211 }
212fail:
213 /* free allocated memory */
214 av_free(huff.nums);
215 av_free(huff.bits);
216 av_free(huff.lens);
217
218 return res;
219}
220
221static void tm2_free_codes(TM2Codes *code)
222{
223 av_free(code->recode);
224 if (code->vlc.table)
225 ff_free_vlc(&code->vlc);
226}
227
228static inline int tm2_get_token(GetBitContext *gb, TM2Codes *code)
229{
230 int val;
231 val = get_vlc2(gb, code->vlc.table, code->bits, 1);
232 if(val<0)
233 return -1;
234 return code->recode[val];
235}
236
237#define TM2_OLD_HEADER_MAGIC 0x00000100
238#define TM2_NEW_HEADER_MAGIC 0x00000101
239
240static inline int tm2_read_header(TM2Context *ctx, const uint8_t *buf)
241{
242 uint32_t magic = AV_RL32(buf);
243
244 switch (magic) {
245 case TM2_OLD_HEADER_MAGIC:
246 avpriv_request_sample(ctx->avctx, "Old TM2 header");
247 return 0;
248 case TM2_NEW_HEADER_MAGIC:
249 return 0;
250 default:
251 av_log(ctx->avctx, AV_LOG_ERROR, "Not a TM2 header: 0x%08"PRIX32"\n",
252 magic);
253 return AVERROR_INVALIDDATA;
254 }
255}
256
257static int tm2_read_deltas(TM2Context *ctx, int stream_id)
258{
259 int d, mb;
260 int i, v;
261
262 d = get_bits(&ctx->gb, 9);
263 mb = get_bits(&ctx->gb, 5);
264
265 av_assert2(mb < 32);
266 if ((d < 1) || (d > TM2_DELTAS) || (mb < 1)) {
267 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect delta table: %i deltas x %i bits\n", d, mb);
268 return AVERROR_INVALIDDATA;
269 }
270
271 for (i = 0; i < d; i++) {
272 v = get_bits_long(&ctx->gb, mb);
273 if (v & (1 << (mb - 1)))
274 ctx->deltas[stream_id][i] = v - (1 << mb);
275 else
276 ctx->deltas[stream_id][i] = v;
277 }
278 for (; i < TM2_DELTAS; i++)
279 ctx->deltas[stream_id][i] = 0;
280
281 return 0;
282}
283
284static int tm2_read_stream(TM2Context *ctx, const uint8_t *buf, int stream_id, int buf_size)
285{
286 int i, ret;
287 int skip = 0;
288 int len, toks, pos;
289 TM2Codes codes;
290 GetByteContext gb;
291
292 if (buf_size < 4) {
293 av_log(ctx->avctx, AV_LOG_ERROR, "not enough space for len left\n");
294 return AVERROR_INVALIDDATA;
295 }
296
297 /* get stream length in dwords */
298 bytestream2_init(&gb, buf, buf_size);
299 len = bytestream2_get_be32(&gb);
300 skip = len * 4 + 4;
301
302 if (len == 0)
303 return 4;
304
305 if (len >= INT_MAX/4-1 || len < 0 || skip > buf_size) {
306 av_log(ctx->avctx, AV_LOG_ERROR, "invalid stream size\n");
307 return AVERROR_INVALIDDATA;
308 }
309
310 toks = bytestream2_get_be32(&gb);
311 if (toks & 1) {
312 len = bytestream2_get_be32(&gb);
313 if (len == TM2_ESCAPE) {
314 len = bytestream2_get_be32(&gb);
315 }
316 if (len > 0) {
317 pos = bytestream2_tell(&gb);
318 if (skip <= pos)
319 return AVERROR_INVALIDDATA;
320 init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
321 if ((ret = tm2_read_deltas(ctx, stream_id)) < 0)
322 return ret;
323 bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2);
324 }
325 }
326 /* skip unused fields */
327 len = bytestream2_get_be32(&gb);
328 if (len == TM2_ESCAPE) { /* some unknown length - could be escaped too */
329 bytestream2_skip(&gb, 8); /* unused by decoder */
330 } else {
331 bytestream2_skip(&gb, 4); /* unused by decoder */
332 }
333
334 pos = bytestream2_tell(&gb);
335 if (skip <= pos)
336 return AVERROR_INVALIDDATA;
337 init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
338 if ((ret = tm2_build_huff_table(ctx, &codes)) < 0)
339 return ret;
340 bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2);
341
342 toks >>= 1;
343 /* check if we have sane number of tokens */
344 if ((toks < 0) || (toks > 0xFFFFFF)) {
345 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
346 tm2_free_codes(&codes);
347 return AVERROR_INVALIDDATA;
348 }
349 ret = av_reallocp_array(&ctx->tokens[stream_id], toks, sizeof(int));
350 if (ret < 0) {
351 ctx->tok_lens[stream_id] = 0;
352 return ret;
353 }
354 ctx->tok_lens[stream_id] = toks;
355 len = bytestream2_get_be32(&gb);
356 if (len > 0) {
357 pos = bytestream2_tell(&gb);
358 if (skip <= pos)
359 return AVERROR_INVALIDDATA;
360 init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
361 for (i = 0; i < toks; i++) {
362 if (get_bits_left(&ctx->gb) <= 0) {
363 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
364 return AVERROR_INVALIDDATA;
365 }
366 ctx->tokens[stream_id][i] = tm2_get_token(&ctx->gb, &codes);
367 if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS || ctx->tokens[stream_id][i]<0) {
368 av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n",
369 ctx->tokens[stream_id][i], stream_id, i);
370 return AVERROR_INVALIDDATA;
371 }
372 }
373 } else {
374 for (i = 0; i < toks; i++) {
375 ctx->tokens[stream_id][i] = codes.recode[0];
376 if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS) {
377 av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n",
378 ctx->tokens[stream_id][i], stream_id, i);
379 return AVERROR_INVALIDDATA;
380 }
381 }
382 }
383 tm2_free_codes(&codes);
384
385 return skip;
386}
387
388static inline int GET_TOK(TM2Context *ctx,int type)
389{
390 if (ctx->tok_ptrs[type] >= ctx->tok_lens[type]) {
391 av_log(ctx->avctx, AV_LOG_ERROR, "Read token from stream %i out of bounds (%i>=%i)\n", type, ctx->tok_ptrs[type], ctx->tok_lens[type]);
392 return 0;
393 }
394 if (type <= TM2_MOT) {
395 if (ctx->tokens[type][ctx->tok_ptrs[type]] >= TM2_DELTAS) {
396 av_log(ctx->avctx, AV_LOG_ERROR, "token %d is too large\n", ctx->tokens[type][ctx->tok_ptrs[type]]);
397 return 0;
398 }
399 return ctx->deltas[type][ctx->tokens[type][ctx->tok_ptrs[type]++]];
400 }
401 return ctx->tokens[type][ctx->tok_ptrs[type]++];
402}
403
404/* blocks decoding routines */
405
406/* common Y, U, V pointers initialisation */
407#define TM2_INIT_POINTERS() \
408 int *last, *clast; \
409 int *Y, *U, *V;\
410 int Ystride, Ustride, Vstride;\
411\
412 Ystride = ctx->y_stride;\
413 Vstride = ctx->uv_stride;\
414 Ustride = ctx->uv_stride;\
415 Y = (ctx->cur?ctx->Y2:ctx->Y1) + by * 4 * Ystride + bx * 4;\
416 V = (ctx->cur?ctx->V2:ctx->V1) + by * 2 * Vstride + bx * 2;\
417 U = (ctx->cur?ctx->U2:ctx->U1) + by * 2 * Ustride + bx * 2;\
418 last = ctx->last + bx * 4;\
419 clast = ctx->clast + bx * 4;
420
421#define TM2_INIT_POINTERS_2() \
422 int *Yo, *Uo, *Vo;\
423 int oYstride, oUstride, oVstride;\
424\
425 TM2_INIT_POINTERS();\
426 oYstride = Ystride;\
427 oVstride = Vstride;\
428 oUstride = Ustride;\
429 Yo = (ctx->cur?ctx->Y1:ctx->Y2) + by * 4 * oYstride + bx * 4;\
430 Vo = (ctx->cur?ctx->V1:ctx->V2) + by * 2 * oVstride + bx * 2;\
431 Uo = (ctx->cur?ctx->U1:ctx->U2) + by * 2 * oUstride + bx * 2;
432
433/* recalculate last and delta values for next blocks */
434#define TM2_RECALC_BLOCK(CHR, stride, last, CD) {\
435 CD[0] = CHR[1] - last[1];\
436 CD[1] = (int)CHR[stride + 1] - (int)CHR[1];\
437 last[0] = (int)CHR[stride + 0];\
438 last[1] = (int)CHR[stride + 1];}
439
440/* common operations - add deltas to 4x4 block of luma or 2x2 blocks of chroma */
441static inline void tm2_apply_deltas(TM2Context *ctx, int* Y, int stride, int *deltas, int *last)
442{
443 int ct, d;
444 int i, j;
445
446 for (j = 0; j < 4; j++){
447 ct = ctx->D[j];
448 for (i = 0; i < 4; i++){
449 d = deltas[i + j * 4];
450 ct += d;
451 last[i] += ct;
452 Y[i] = av_clip_uint8(last[i]);
453 }
454 Y += stride;
455 ctx->D[j] = ct;
456 }
457}
458
459static inline void tm2_high_chroma(int *data, int stride, int *last, int *CD, int *deltas)
460{
461 int i, j;
462 for (j = 0; j < 2; j++) {
463 for (i = 0; i < 2; i++) {
464 CD[j] += deltas[i + j * 2];
465 last[i] += CD[j];
466 data[i] = last[i];
467 }
468 data += stride;
469 }
470}
471
472static inline void tm2_low_chroma(int *data, int stride, int *clast, int *CD, int *deltas, int bx)
473{
474 int t;
475 int l;
476 int prev;
477
478 if (bx > 0)
479 prev = clast[-3];
480 else
481 prev = 0;
482 t = (CD[0] + CD[1]) >> 1;
483 l = (prev - CD[0] - CD[1] + clast[1]) >> 1;
484 CD[1] = CD[0] + CD[1] - t;
485 CD[0] = t;
486 clast[0] = l;
487
488 tm2_high_chroma(data, stride, clast, CD, deltas);
489}
490
491static inline void tm2_hi_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
492{
493 int i;
494 int deltas[16];
495 TM2_INIT_POINTERS();
496
497 /* hi-res chroma */
498 for (i = 0; i < 4; i++) {
499 deltas[i] = GET_TOK(ctx, TM2_C_HI);
500 deltas[i + 4] = GET_TOK(ctx, TM2_C_HI);
501 }
502 tm2_high_chroma(U, Ustride, clast, ctx->CD, deltas);
503 tm2_high_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas + 4);
504
505 /* hi-res luma */
506 for (i = 0; i < 16; i++)
507 deltas[i] = GET_TOK(ctx, TM2_L_HI);
508
509 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
510}
511
512static inline void tm2_med_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
513{
514 int i;
515 int deltas[16];
516 TM2_INIT_POINTERS();
517
518 /* low-res chroma */
519 deltas[0] = GET_TOK(ctx, TM2_C_LO);
520 deltas[1] = deltas[2] = deltas[3] = 0;
521 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
522
523 deltas[0] = GET_TOK(ctx, TM2_C_LO);
524 deltas[1] = deltas[2] = deltas[3] = 0;
525 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
526
527 /* hi-res luma */
528 for (i = 0; i < 16; i++)
529 deltas[i] = GET_TOK(ctx, TM2_L_HI);
530
531 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
532}
533
534static inline void tm2_low_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
535{
536 int i;
537 int t1, t2;
538 int deltas[16];
539 TM2_INIT_POINTERS();
540
541 /* low-res chroma */
542 deltas[0] = GET_TOK(ctx, TM2_C_LO);
543 deltas[1] = deltas[2] = deltas[3] = 0;
544 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
545
546 deltas[0] = GET_TOK(ctx, TM2_C_LO);
547 deltas[1] = deltas[2] = deltas[3] = 0;
548 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
549
550 /* low-res luma */
551 for (i = 0; i < 16; i++)
552 deltas[i] = 0;
553
554 deltas[ 0] = GET_TOK(ctx, TM2_L_LO);
555 deltas[ 2] = GET_TOK(ctx, TM2_L_LO);
556 deltas[ 8] = GET_TOK(ctx, TM2_L_LO);
557 deltas[10] = GET_TOK(ctx, TM2_L_LO);
558
559 if (bx > 0)
560 last[0] = (last[-1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3] + last[1]) >> 1;
561 else
562 last[0] = (last[1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3])>> 1;
563 last[2] = (last[1] + last[3]) >> 1;
564
565 t1 = ctx->D[0] + ctx->D[1];
566 ctx->D[0] = t1 >> 1;
567 ctx->D[1] = t1 - (t1 >> 1);
568 t2 = ctx->D[2] + ctx->D[3];
569 ctx->D[2] = t2 >> 1;
570 ctx->D[3] = t2 - (t2 >> 1);
571
572 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
573}
574
575static inline void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
576{
577 int i;
578 int ct;
579 int left, right, diff;
580 int deltas[16];
581 TM2_INIT_POINTERS();
582
583 /* null chroma */
584 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
585 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
586
587 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
588 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
589
590 /* null luma */
591 for (i = 0; i < 16; i++)
592 deltas[i] = 0;
593
594 ct = ctx->D[0] + ctx->D[1] + ctx->D[2] + ctx->D[3];
595
596 if (bx > 0)
597 left = last[-1] - ct;
598 else
599 left = 0;
600
601 right = last[3];
602 diff = right - left;
603 last[0] = left + (diff >> 2);
604 last[1] = left + (diff >> 1);
605 last[2] = right - (diff >> 2);
606 last[3] = right;
607 {
608 int tp = left;
609
610 ctx->D[0] = (tp + (ct >> 2)) - left;
611 left += ctx->D[0];
612 ctx->D[1] = (tp + (ct >> 1)) - left;
613 left += ctx->D[1];
614 ctx->D[2] = ((tp + ct) - (ct >> 2)) - left;
615 left += ctx->D[2];
616 ctx->D[3] = (tp + ct) - left;
617 }
618 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
619}
620
621static inline void tm2_still_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
622{
623 int i, j;
624 TM2_INIT_POINTERS_2();
625
626 /* update chroma */
627 for (j = 0; j < 2; j++) {
628 for (i = 0; i < 2; i++){
629 U[i] = Uo[i];
630 V[i] = Vo[i];
631 }
632 U += Ustride; V += Vstride;
633 Uo += oUstride; Vo += oVstride;
634 }
635 U -= Ustride * 2;
636 V -= Vstride * 2;
637 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
638 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
639
640 /* update deltas */
641 ctx->D[0] = Yo[3] - last[3];
642 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
643 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
644 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
645
646 for (j = 0; j < 4; j++) {
647 for (i = 0; i < 4; i++) {
648 Y[i] = Yo[i];
649 last[i] = Yo[i];
650 }
651 Y += Ystride;
652 Yo += oYstride;
653 }
654}
655
656static inline void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
657{
658 int i, j;
659 int d;
660 TM2_INIT_POINTERS_2();
661
662 /* update chroma */
663 for (j = 0; j < 2; j++) {
664 for (i = 0; i < 2; i++) {
665 U[i] = Uo[i] + GET_TOK(ctx, TM2_UPD);
666 V[i] = Vo[i] + GET_TOK(ctx, TM2_UPD);
667 }
668 U += Ustride;
669 V += Vstride;
670 Uo += oUstride;
671 Vo += oVstride;
672 }
673 U -= Ustride * 2;
674 V -= Vstride * 2;
675 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
676 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
677
678 /* update deltas */
679 ctx->D[0] = Yo[3] - last[3];
680 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
681 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
682 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
683
684 for (j = 0; j < 4; j++) {
685 d = last[3];
686 for (i = 0; i < 4; i++) {
687 Y[i] = Yo[i] + GET_TOK(ctx, TM2_UPD);
688 last[i] = Y[i];
689 }
690 ctx->D[j] = last[3] - d;
691 Y += Ystride;
692 Yo += oYstride;
693 }
694}
695
696static inline void tm2_motion_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
697{
698 int i, j;
699 int mx, my;
700 TM2_INIT_POINTERS_2();
701
702 mx = GET_TOK(ctx, TM2_MOT);
703 my = GET_TOK(ctx, TM2_MOT);
704 mx = av_clip(mx, -(bx * 4 + 4), ctx->avctx->width - bx * 4);
705 my = av_clip(my, -(by * 4 + 4), ctx->avctx->height - by * 4);
706
707 if (4*bx+mx<0 || 4*by+my<0 || 4*bx+mx+4 > ctx->avctx->width || 4*by+my+4 > ctx->avctx->height) {
708 av_log(ctx->avctx, AV_LOG_ERROR, "MV out of picture\n");
709 return;
710 }
711
712 Yo += my * oYstride + mx;
713 Uo += (my >> 1) * oUstride + (mx >> 1);
714 Vo += (my >> 1) * oVstride + (mx >> 1);
715
716 /* copy chroma */
717 for (j = 0; j < 2; j++) {
718 for (i = 0; i < 2; i++) {
719 U[i] = Uo[i];
720 V[i] = Vo[i];
721 }
722 U += Ustride;
723 V += Vstride;
724 Uo += oUstride;
725 Vo += oVstride;
726 }
727 U -= Ustride * 2;
728 V -= Vstride * 2;
729 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
730 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
731
732 /* copy luma */
733 for (j = 0; j < 4; j++) {
734 for (i = 0; i < 4; i++) {
735 Y[i] = Yo[i];
736 }
737 Y += Ystride;
738 Yo += oYstride;
739 }
740 /* calculate deltas */
741 Y -= Ystride * 4;
742 ctx->D[0] = Y[3] - last[3];
743 ctx->D[1] = Y[3 + Ystride] - Y[3];
744 ctx->D[2] = Y[3 + Ystride * 2] - Y[3 + Ystride];
745 ctx->D[3] = Y[3 + Ystride * 3] - Y[3 + Ystride * 2];
746 for (i = 0; i < 4; i++)
747 last[i] = Y[i + Ystride * 3];
748}
749
750static int tm2_decode_blocks(TM2Context *ctx, AVFrame *p)
751{
752 int i, j;
753 int w = ctx->avctx->width, h = ctx->avctx->height, bw = w >> 2, bh = h >> 2, cw = w >> 1;
754 int type;
755 int keyframe = 1;
756 int *Y, *U, *V;
757 uint8_t *dst;
758
759 for (i = 0; i < TM2_NUM_STREAMS; i++)
760 ctx->tok_ptrs[i] = 0;
761
762 if (ctx->tok_lens[TM2_TYPE]<bw*bh) {
763 av_log(ctx->avctx,AV_LOG_ERROR,"Got %i tokens for %i blocks\n",ctx->tok_lens[TM2_TYPE],bw*bh);
764 return AVERROR_INVALIDDATA;
765 }
766
767 memset(ctx->last, 0, 4 * bw * sizeof(int));
768 memset(ctx->clast, 0, 4 * bw * sizeof(int));
769
770 for (j = 0; j < bh; j++) {
771 memset(ctx->D, 0, 4 * sizeof(int));
772 memset(ctx->CD, 0, 4 * sizeof(int));
773 for (i = 0; i < bw; i++) {
774 type = GET_TOK(ctx, TM2_TYPE);
775 switch(type) {
776 case TM2_HI_RES:
777 tm2_hi_res_block(ctx, p, i, j);
778 break;
779 case TM2_MED_RES:
780 tm2_med_res_block(ctx, p, i, j);
781 break;
782 case TM2_LOW_RES:
783 tm2_low_res_block(ctx, p, i, j);
784 break;
785 case TM2_NULL_RES:
786 tm2_null_res_block(ctx, p, i, j);
787 break;
788 case TM2_UPDATE:
789 tm2_update_block(ctx, p, i, j);
790 keyframe = 0;
791 break;
792 case TM2_STILL:
793 tm2_still_block(ctx, p, i, j);
794 keyframe = 0;
795 break;
796 case TM2_MOTION:
797 tm2_motion_block(ctx, p, i, j);
798 keyframe = 0;
799 break;
800 default:
801 av_log(ctx->avctx, AV_LOG_ERROR, "Skipping unknown block type %i\n", type);
802 }
803 }
804 }
805
806 /* copy data from our buffer to AVFrame */
807 Y = (ctx->cur?ctx->Y2:ctx->Y1);
808 U = (ctx->cur?ctx->U2:ctx->U1);
809 V = (ctx->cur?ctx->V2:ctx->V1);
810 dst = p->data[0];
811 for (j = 0; j < h; j++) {
812 for (i = 0; i < w; i++) {
813 int y = Y[i], u = U[i >> 1], v = V[i >> 1];
814 dst[3*i+0] = av_clip_uint8(y + v);
815 dst[3*i+1] = av_clip_uint8(y);
816 dst[3*i+2] = av_clip_uint8(y + u);
817 }
818
819 /* horizontal edge extension */
820 Y[-4] = Y[-3] = Y[-2] = Y[-1] = Y[0];
821 Y[w + 3] = Y[w + 2] = Y[w + 1] = Y[w] = Y[w - 1];
822
823 /* vertical edge extension */
824 if (j == 0) {
825 memcpy(Y - 4 - 1 * ctx->y_stride, Y - 4, ctx->y_stride);
826 memcpy(Y - 4 - 2 * ctx->y_stride, Y - 4, ctx->y_stride);
827 memcpy(Y - 4 - 3 * ctx->y_stride, Y - 4, ctx->y_stride);
828 memcpy(Y - 4 - 4 * ctx->y_stride, Y - 4, ctx->y_stride);
829 } else if (j == h - 1) {
830 memcpy(Y - 4 + 1 * ctx->y_stride, Y - 4, ctx->y_stride);
831 memcpy(Y - 4 + 2 * ctx->y_stride, Y - 4, ctx->y_stride);
832 memcpy(Y - 4 + 3 * ctx->y_stride, Y - 4, ctx->y_stride);
833 memcpy(Y - 4 + 4 * ctx->y_stride, Y - 4, ctx->y_stride);
834 }
835
836 Y += ctx->y_stride;
837 if (j & 1) {
838 /* horizontal edge extension */
839 U[-2] = U[-1] = U[0];
840 V[-2] = V[-1] = V[0];
841 U[cw + 1] = U[cw] = U[cw - 1];
842 V[cw + 1] = V[cw] = V[cw - 1];
843
844 /* vertical edge extension */
845 if (j == 1) {
846 memcpy(U - 2 - 1 * ctx->uv_stride, U - 2, ctx->uv_stride);
847 memcpy(V - 2 - 1 * ctx->uv_stride, V - 2, ctx->uv_stride);
848 memcpy(U - 2 - 2 * ctx->uv_stride, U - 2, ctx->uv_stride);
849 memcpy(V - 2 - 2 * ctx->uv_stride, V - 2, ctx->uv_stride);
850 } else if (j == h - 1) {
851 memcpy(U - 2 + 1 * ctx->uv_stride, U - 2, ctx->uv_stride);
852 memcpy(V - 2 + 1 * ctx->uv_stride, V - 2, ctx->uv_stride);
853 memcpy(U - 2 + 2 * ctx->uv_stride, U - 2, ctx->uv_stride);
854 memcpy(V - 2 + 2 * ctx->uv_stride, V - 2, ctx->uv_stride);
855 }
856
857 U += ctx->uv_stride;
858 V += ctx->uv_stride;
859 }
860 dst += p->linesize[0];
861 }
862
863 return keyframe;
864}
865
866static const int tm2_stream_order[TM2_NUM_STREAMS] = {
867 TM2_C_HI, TM2_C_LO, TM2_L_HI, TM2_L_LO, TM2_UPD, TM2_MOT, TM2_TYPE
868};
869
870#define TM2_HEADER_SIZE 40
871
872static int decode_frame(AVCodecContext *avctx,
873 void *data, int *got_frame,
874 AVPacket *avpkt)
875{
876 TM2Context * const l = avctx->priv_data;
877 const uint8_t *buf = avpkt->data;
878 int buf_size = avpkt->size & ~3;
879 AVFrame * const p = l->pic;
880 int offset = TM2_HEADER_SIZE;
881 int i, t, ret;
882
883 av_fast_padded_malloc(&l->buffer, &l->buffer_size, buf_size);
884 if (!l->buffer) {
885 av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n");
886 return AVERROR(ENOMEM);
887 }
888
889 if ((ret = ff_reget_buffer(avctx, p)) < 0)
890 return ret;
891
892 l->bdsp.bswap_buf((uint32_t *) l->buffer, (const uint32_t *) buf,
893 buf_size >> 2);
894
895 if ((ret = tm2_read_header(l, l->buffer)) < 0) {
896 return ret;
897 }
898
899 for (i = 0; i < TM2_NUM_STREAMS; i++) {
900 if (offset >= buf_size) {
901 av_log(avctx, AV_LOG_ERROR, "no space for tm2_read_stream\n");
902 return AVERROR_INVALIDDATA;
903 }
904
905 t = tm2_read_stream(l, l->buffer + offset, tm2_stream_order[i],
906 buf_size - offset);
907 if (t < 0) {
908 int j = tm2_stream_order[i];
909 memset(l->tokens[j], 0, sizeof(**l->tokens) * l->tok_lens[j]);
910 return t;
911 }
912 offset += t;
913 }
914 p->key_frame = tm2_decode_blocks(l, p);
915 if (p->key_frame)
916 p->pict_type = AV_PICTURE_TYPE_I;
917 else
918 p->pict_type = AV_PICTURE_TYPE_P;
919
920 l->cur = !l->cur;
921 *got_frame = 1;
922 ret = av_frame_ref(data, l->pic);
923
924 return (ret < 0) ? ret : buf_size;
925}
926
927static av_cold int decode_init(AVCodecContext *avctx)
928{
929 TM2Context * const l = avctx->priv_data;
930 int i, w = avctx->width, h = avctx->height;
931
932 if ((avctx->width & 3) || (avctx->height & 3)) {
933 av_log(avctx, AV_LOG_ERROR, "Width and height must be multiple of 4\n");
934 return AVERROR(EINVAL);
935 }
936
937 l->avctx = avctx;
938 avctx->pix_fmt = AV_PIX_FMT_BGR24;
939
940 l->pic = av_frame_alloc();
941 if (!l->pic)
942 return AVERROR(ENOMEM);
943
944 ff_bswapdsp_init(&l->bdsp);
945
946 l->last = av_malloc_array(w >> 2, 4 * sizeof(*l->last) );
947 l->clast = av_malloc_array(w >> 2, 4 * sizeof(*l->clast));
948
949 for (i = 0; i < TM2_NUM_STREAMS; i++) {
950 l->tokens[i] = NULL;
951 l->tok_lens[i] = 0;
952 }
953
954 w += 8;
955 h += 8;
956 l->Y1_base = av_calloc(w * h, sizeof(*l->Y1_base));
957 l->Y2_base = av_calloc(w * h, sizeof(*l->Y2_base));
958 l->y_stride = w;
959 w = (w + 1) >> 1;
960 h = (h + 1) >> 1;
961 l->U1_base = av_calloc(w * h, sizeof(*l->U1_base));
962 l->V1_base = av_calloc(w * h, sizeof(*l->V1_base));
963 l->U2_base = av_calloc(w * h, sizeof(*l->U2_base));
964 l->V2_base = av_calloc(w * h, sizeof(*l->V1_base));
965 l->uv_stride = w;
966 l->cur = 0;
967 if (!l->Y1_base || !l->Y2_base || !l->U1_base ||
968 !l->V1_base || !l->U2_base || !l->V2_base ||
969 !l->last || !l->clast) {
970 av_freep(&l->Y1_base);
971 av_freep(&l->Y2_base);
972 av_freep(&l->U1_base);
973 av_freep(&l->U2_base);
974 av_freep(&l->V1_base);
975 av_freep(&l->V2_base);
976 av_freep(&l->last);
977 av_freep(&l->clast);
978 av_frame_free(&l->pic);
979 return AVERROR(ENOMEM);
980 }
981 l->Y1 = l->Y1_base + l->y_stride * 4 + 4;
982 l->Y2 = l->Y2_base + l->y_stride * 4 + 4;
983 l->U1 = l->U1_base + l->uv_stride * 2 + 2;
984 l->U2 = l->U2_base + l->uv_stride * 2 + 2;
985 l->V1 = l->V1_base + l->uv_stride * 2 + 2;
986 l->V2 = l->V2_base + l->uv_stride * 2 + 2;
987
988 return 0;
989}
990
991static av_cold int decode_end(AVCodecContext *avctx)
992{
993 TM2Context * const l = avctx->priv_data;
994 int i;
995
996 av_free(l->last);
997 av_free(l->clast);
998 for (i = 0; i < TM2_NUM_STREAMS; i++)
f6fa7814 999 av_freep(&l->tokens[i]);
2ba45a60 1000 if (l->Y1) {
f6fa7814
DM		 1001 av_freep(&l->Y1_base);
1002 av_freep(&l->U1_base);
1003 av_freep(&l->V1_base);
1004 av_freep(&l->Y2_base);
1005 av_freep(&l->U2_base);
1006 av_freep(&l->V2_base);
2ba45a60
DM		 1007 }
1008 av_freep(&l->buffer);
1009 l->buffer_size = 0;
1010
1011 av_frame_free(&l->pic);
1012
1013 return 0;
1014}
1015
1016AVCodec ff_truemotion2_decoder = {
1017 .name = "truemotion2",
1018 .long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 2.0"),
1019 .type = AVMEDIA_TYPE_VIDEO,
1020 .id = AV_CODEC_ID_TRUEMOTION2,
1021 .priv_data_size = sizeof(TM2Context),
1022 .init = decode_init,
1023 .close = decode_end,
1024 .decode = decode_frame,
1025 .capabilities = CODEC_CAP_DR1,
1026};
ffmpeg Piment Noir Debian package repository