VirtualBox

source: vbox/trunk/src/libs/ffmpeg-20060710/libavcodec/truemotion2.c@ 9441

Last change on this file since 9441 was 5776, checked in by vboxsync, 17 years ago

ffmpeg: exported to OSE
File size: 24.7 KB
Line 
1/*
2 * Duck/ON2 TrueMotion 2 Decoder
3 * Copyright (c) 2005 Konstantin Shishkov
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 */
20
21/**
22 * @file truemotion2.c
23 * Duck TrueMotion2 decoder.
24 */
25
26#include "avcodec.h"
27#include "common.h"
28#include "bitstream.h"
29#include "dsputil.h"
30
31#define TM2_ESCAPE 0x80000000
32#define TM2_DELTAS 64
33/* Huffman-coded streams of different types of blocks */
34enum TM2_STREAMS{ TM2_C_HI = 0, TM2_C_LO, TM2_L_HI, TM2_L_LO,
35 TM2_UPD, TM2_MOT, TM2_TYPE, TM2_NUM_STREAMS};
36/* Block types */
37enum TM2_BLOCKS{ TM2_HI_RES = 0, TM2_MED_RES, TM2_LOW_RES, TM2_NULL_RES,
38 TM2_UPDATE, TM2_STILL, TM2_MOTION};
39
40typedef struct TM2Context{
41 AVCodecContext *avctx;
42 AVFrame pic;
43
44 GetBitContext gb;
45 DSPContext dsp;
46
47 /* TM2 streams */
48 int *tokens[TM2_NUM_STREAMS];
49 int tok_lens[TM2_NUM_STREAMS];
50 int tok_ptrs[TM2_NUM_STREAMS];
51 int deltas[TM2_NUM_STREAMS][TM2_DELTAS];
52 /* for blocks decoding */
53 int D[4];
54 int CD[4];
55 int *last;
56 int *clast;
57
58 /* data for current and previous frame */
59 int *Y1, *U1, *V1, *Y2, *U2, *V2;
60 int cur;
61} TM2Context;
62
63/**
64* Huffman codes for each of streams
65*/
66typedef struct TM2Codes{
67 VLC vlc; ///< table for FFmpeg bitstream reader
68 int bits;
69 int *recode; ///< table for converting from code indexes to values
70 int length;
71} TM2Codes;
72
73/**
74* structure for gathering Huffman codes information
75*/
76typedef struct TM2Huff{
77 int val_bits; ///< length of literal
78 int max_bits; ///< maximum length of code
79 int min_bits; ///< minimum length of code
80 int nodes; ///< total number of nodes in tree
81 int num; ///< current number filled
82 int max_num; ///< total number of codes
83 int *nums; ///< literals
84 uint32_t *bits; ///< codes
85 int *lens; ///< codelengths
86} TM2Huff;
87
88static int tm2_read_tree(TM2Context *ctx, uint32_t prefix, int length, TM2Huff *huff)
89{
90 if(length > huff->max_bits) {
91 av_log(ctx->avctx, AV_LOG_ERROR, "Tree exceeded its given depth (%i)\n", huff->max_bits);
92 return -1;
93 }
94
95 if(!get_bits1(&ctx->gb)) { /* literal */
96 if (length == 0) {
97 length = 1;
98 }
99 if(huff->num >= huff->max_num) {
100 av_log(ctx->avctx, AV_LOG_DEBUG, "Too many literals\n");
101 return -1;
102 }
103 huff->nums[huff->num] = get_bits_long(&ctx->gb, huff->val_bits);
104 huff->bits[huff->num] = prefix;
105 huff->lens[huff->num] = length;
106 huff->num++;
107 return 0;
108 } else { /* non-terminal node */
109 if(tm2_read_tree(ctx, prefix << 1, length + 1, huff) == -1)
110 return -1;
111 if(tm2_read_tree(ctx, (prefix << 1) | 1, length + 1, huff) == -1)
112 return -1;
113 }
114 return 0;
115}
116
117static int tm2_build_huff_table(TM2Context *ctx, TM2Codes *code)
118{
119 TM2Huff huff;
120 int res = 0;
121
122 huff.val_bits = get_bits(&ctx->gb, 5);
123 huff.max_bits = get_bits(&ctx->gb, 5);
124 huff.min_bits = get_bits(&ctx->gb, 5);
125 huff.nodes = get_bits_long(&ctx->gb, 17);
126 huff.num = 0;
127
128 /* check for correct codes parameters */
129 if((huff.val_bits < 1) || (huff.val_bits > 32) ||
130 (huff.max_bits < 0) || (huff.max_bits > 32)) {
131 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect tree parameters - literal length: %i, max code length: %i\n",
132 huff.val_bits, huff.max_bits);
133 return -1;
134 }
135 if((huff.nodes < 0) || (huff.nodes > 0x10000)) {
136 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of Huffman tree nodes: %i\n", huff.nodes);
137 return -1;
138 }
139 /* one-node tree */
140 if(huff.max_bits == 0)
141 huff.max_bits = 1;
142
143 /* allocate space for codes - it is exactly ceil(nodes / 2) entries */
144 huff.max_num = (huff.nodes + 1) >> 1;
145 huff.nums = av_mallocz(huff.max_num * sizeof(int));
146 huff.bits = av_mallocz(huff.max_num * sizeof(uint32_t));
147 huff.lens = av_mallocz(huff.max_num * sizeof(int));
148
149 if(tm2_read_tree(ctx, 0, 0, &huff) == -1)
150 res = -1;
151
152 if(huff.num != huff.max_num) {
153 av_log(ctx->avctx, AV_LOG_ERROR, "Got less codes than expected: %i of %i\n",
154 huff.num, huff.max_num);
155 res = -1;
156 }
157
158 /* convert codes to vlc_table */
159 if(res != -1) {
160 int i;
161
162 res = init_vlc(&code->vlc, huff.max_bits, huff.max_num,
163 huff.lens, sizeof(int), sizeof(int),
164 huff.bits, sizeof(uint32_t), sizeof(uint32_t), 0);
165 if(res < 0) {
166 av_log(ctx->avctx, AV_LOG_ERROR, "Cannot build VLC table\n");
167 res = -1;
168 } else
169 res = 0;
170 if(res != -1) {
171 code->bits = huff.max_bits;
172 code->length = huff.max_num;
173 code->recode = av_malloc(code->length * sizeof(int));
174 for(i = 0; i < code->length; i++)
175 code->recode[i] = huff.nums[i];
176 }
177 }
178 /* free allocated memory */
179 av_free(huff.nums);
180 av_free(huff.bits);
181 av_free(huff.lens);
182
183 return res;
184}
185
186static void tm2_free_codes(TM2Codes *code)
187{
188 if(code->recode)
189 av_free(code->recode);
190 if(code->vlc.table)
191 free_vlc(&code->vlc);
192}
193
194static inline int tm2_get_token(GetBitContext *gb, TM2Codes *code)
195{
196 int val;
197 val = get_vlc2(gb, code->vlc.table, code->bits, 1);
198 return code->recode[val];
199}
200
201static inline int tm2_read_header(TM2Context *ctx, uint8_t *buf)
202{
203 uint32_t magic;
204 uint8_t *obuf;
205 int length;
206
207 obuf = buf;
208
209 magic = LE_32(buf);
210 buf += 4;
211
212 if(magic == 0x00000100) { /* old header */
213/* av_log (ctx->avctx, AV_LOG_ERROR, "TM2 old header: not implemented (yet)\n"); */
214 return 40;
215 } else if(magic == 0x00000101) { /* new header */
216 int w, h, size, flags, xr, yr;
217
218 length = LE_32(buf);
219 buf += 4;
220
221 init_get_bits(&ctx->gb, buf, 32 * 8);
222 size = get_bits_long(&ctx->gb, 31);
223 h = get_bits(&ctx->gb, 15);
224 w = get_bits(&ctx->gb, 15);
225 flags = get_bits_long(&ctx->gb, 31);
226 yr = get_bits(&ctx->gb, 9);
227 xr = get_bits(&ctx->gb, 9);
228
229 return 40;
230 } else {
231 av_log (ctx->avctx, AV_LOG_ERROR, "Not a TM2 header: 0x%08X\n", magic);
232 return -1;
233 }
234
235 return (buf - obuf);
236}
237
238static int tm2_read_deltas(TM2Context *ctx, int stream_id) {
239 int d, mb;
240 int i, v;
241
242 d = get_bits(&ctx->gb, 9);
243 mb = get_bits(&ctx->gb, 5);
244
245 if((d < 1) || (d > TM2_DELTAS) || (mb < 1) || (mb > 32)) {
246 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect delta table: %i deltas x %i bits\n", d, mb);
247 return -1;
248 }
249
250 for(i = 0; i < d; i++) {
251 v = get_bits_long(&ctx->gb, mb);
252 if(v & (1 << (mb - 1)))
253 ctx->deltas[stream_id][i] = v - (1 << mb);
254 else
255 ctx->deltas[stream_id][i] = v;
256 }
257 for(; i < TM2_DELTAS; i++)
258 ctx->deltas[stream_id][i] = 0;
259
260 return 0;
261}
262
263static int tm2_read_stream(TM2Context *ctx, uint8_t *buf, int stream_id) {
264 int i;
265 int cur = 0;
266 int skip = 0;
267 int len, toks;
268 TM2Codes codes;
269
270 /* get stream length in dwords */
271 len = BE_32(buf); buf += 4; cur += 4;
272 skip = len * 4 + 4;
273
274 if(len == 0)
275 return 4;
276
277 toks = BE_32(buf); buf += 4; cur += 4;
278 if(toks & 1) {
279 len = BE_32(buf); buf += 4; cur += 4;
280 if(len == TM2_ESCAPE) {
281 len = BE_32(buf); buf += 4; cur += 4;
282 }
283 if(len > 0) {
284 init_get_bits(&ctx->gb, buf, (skip - cur) * 8);
285 if(tm2_read_deltas(ctx, stream_id) == -1)
286 return -1;
287 buf += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
288 cur += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
289 }
290 }
291 /* skip unused fields */
292 if(BE_32(buf) == TM2_ESCAPE) {
293 buf += 4; cur += 4; /* some unknown length - could be escaped too */
294 }
295 buf += 4; cur += 4;
296 buf += 4; cur += 4; /* unused by decoder */
297
298 init_get_bits(&ctx->gb, buf, (skip - cur) * 8);
299 if(tm2_build_huff_table(ctx, &codes) == -1)
300 return -1;
301 buf += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
302 cur += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
303
304 toks >>= 1;
305 /* check if we have sane number of tokens */
306 if((toks < 0) || (toks > 0xFFFFFF)){
307 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
308 tm2_free_codes(&codes);
309 return -1;
310 }
311 ctx->tokens[stream_id] = av_realloc(ctx->tokens[stream_id], toks * sizeof(int));
312 ctx->tok_lens[stream_id] = toks;
313 len = BE_32(buf); buf += 4; cur += 4;
314 if(len > 0) {
315 init_get_bits(&ctx->gb, buf, (skip - cur) * 8);
316 for(i = 0; i < toks; i++)
317 ctx->tokens[stream_id][i] = tm2_get_token(&ctx->gb, &codes);
318 } else {
319 for(i = 0; i < toks; i++)
320 ctx->tokens[stream_id][i] = codes.recode[0];
321 }
322 tm2_free_codes(&codes);
323
324 return skip;
325}
326
327static inline int GET_TOK(TM2Context *ctx,int type) {
328 if(ctx->tok_ptrs[type] >= ctx->tok_lens[type]) {
329 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]);
330 return 0;
331 }
332 if(type <= TM2_MOT)
333 return ctx->deltas[type][ctx->tokens[type][ctx->tok_ptrs[type]++]];
334 return ctx->tokens[type][ctx->tok_ptrs[type]++];
335}
336
337/* blocks decoding routines */
338
339/* common Y, U, V pointers initialisation */
340#define TM2_INIT_POINTERS() \
341 int *last, *clast; \
342 int *Y, *U, *V;\
343 int Ystride, Ustride, Vstride;\
344\
345 Ystride = ctx->avctx->width;\
346 Vstride = (ctx->avctx->width + 1) >> 1;\
347 Ustride = (ctx->avctx->width + 1) >> 1;\
348 Y = (ctx->cur?ctx->Y2:ctx->Y1) + by * 4 * Ystride + bx * 4;\
349 V = (ctx->cur?ctx->V2:ctx->V1) + by * 2 * Vstride + bx * 2;\
350 U = (ctx->cur?ctx->U2:ctx->U1) + by * 2 * Ustride + bx * 2;\
351 last = ctx->last + bx * 4;\
352 clast = ctx->clast + bx * 4;
353
354#define TM2_INIT_POINTERS_2() \
355 int *Yo, *Uo, *Vo;\
356 int oYstride, oUstride, oVstride;\
357\
358 TM2_INIT_POINTERS();\
359 oYstride = Ystride;\
360 oVstride = Vstride;\
361 oUstride = Ustride;\
362 Yo = (ctx->cur?ctx->Y1:ctx->Y2) + by * 4 * oYstride + bx * 4;\
363 Vo = (ctx->cur?ctx->V1:ctx->V2) + by * 2 * oVstride + bx * 2;\
364 Uo = (ctx->cur?ctx->U1:ctx->U2) + by * 2 * oUstride + bx * 2;
365
366/* recalculate last and delta values for next blocks */
367#define TM2_RECALC_BLOCK(CHR, stride, last, CD) {\
368 CD[0] = (CHR[1] - 128) - last[1];\
369 CD[1] = (int)CHR[stride + 1] - (int)CHR[1];\
370 last[0] = (int)CHR[stride + 0] - 128;\
371 last[1] = (int)CHR[stride + 1] - 128;}
372
373/* common operations - add deltas to 4x4 block of luma or 2x2 blocks of chroma */
374static inline void tm2_apply_deltas(TM2Context *ctx, int* Y, int stride, int *deltas, int *last)
375{
376 int ct, d;
377 int i, j;
378
379 for(j = 0; j < 4; j++){
380 ct = ctx->D[j];
381 for(i = 0; i < 4; i++){
382 d = deltas[i + j * 4];
383 ct += d;
384 last[i] += ct;
385 Y[i] = clip_uint8(last[i]);
386 }
387 Y += stride;
388 ctx->D[j] = ct;
389 }
390}
391
392static inline void tm2_high_chroma(int *data, int stride, int *last, int *CD, int *deltas)
393{
394 int i, j;
395 for(j = 0; j < 2; j++){
396 for(i = 0; i < 2; i++){
397 CD[j] += deltas[i + j * 2];
398 last[i] += CD[j];
399 data[i] = last[i] + 128;
400 }
401 data += stride;
402 }
403}
404
405static inline void tm2_low_chroma(int *data, int stride, int *clast, int *CD, int *deltas, int bx)
406{
407 int t;
408 int l;
409 int prev;
410
411 if(bx > 0)
412 prev = clast[-3];
413 else
414 prev = 0;
415 t = (CD[0] + CD[1]) >> 1;
416 l = (prev - CD[0] - CD[1] + clast[1]) >> 1;
417 CD[1] = CD[0] + CD[1] - t;
418 CD[0] = t;
419 clast[0] = l;
420
421 tm2_high_chroma(data, stride, clast, CD, deltas);
422}
423
424static inline void tm2_hi_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
425{
426 int i;
427 int deltas[16];
428 TM2_INIT_POINTERS();
429
430 /* hi-res chroma */
431 for(i = 0; i < 4; i++) {
432 deltas[i] = GET_TOK(ctx, TM2_C_HI);
433 deltas[i + 4] = GET_TOK(ctx, TM2_C_HI);
434 }
435 tm2_high_chroma(U, Ustride, clast, ctx->CD, deltas);
436 tm2_high_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas + 4);
437
438 /* hi-res luma */
439 for(i = 0; i < 16; i++)
440 deltas[i] = GET_TOK(ctx, TM2_L_HI);
441
442 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
443}
444
445static inline void tm2_med_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
446{
447 int i;
448 int deltas[16];
449 TM2_INIT_POINTERS();
450
451 /* low-res chroma */
452 deltas[0] = GET_TOK(ctx, TM2_C_LO);
453 deltas[1] = deltas[2] = deltas[3] = 0;
454 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
455
456 deltas[0] = GET_TOK(ctx, TM2_C_LO);
457 deltas[1] = deltas[2] = deltas[3] = 0;
458 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
459
460 /* hi-res luma */
461 for(i = 0; i < 16; i++)
462 deltas[i] = GET_TOK(ctx, TM2_L_HI);
463
464 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
465}
466
467static inline void tm2_low_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
468{
469 int i;
470 int t1, t2;
471 int deltas[16];
472 TM2_INIT_POINTERS();
473
474 /* low-res chroma */
475 deltas[0] = GET_TOK(ctx, TM2_C_LO);
476 deltas[1] = deltas[2] = deltas[3] = 0;
477 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
478
479 deltas[0] = GET_TOK(ctx, TM2_C_LO);
480 deltas[1] = deltas[2] = deltas[3] = 0;
481 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
482
483 /* low-res luma */
484 for(i = 0; i < 16; i++)
485 deltas[i] = 0;
486
487 deltas[ 0] = GET_TOK(ctx, TM2_L_LO);
488 deltas[ 2] = GET_TOK(ctx, TM2_L_LO);
489 deltas[ 8] = GET_TOK(ctx, TM2_L_LO);
490 deltas[10] = GET_TOK(ctx, TM2_L_LO);
491
492 if(bx > 0)
493 last[0] = (last[-1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3] + last[1]) >> 1;
494 else
495 last[0] = (last[1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3])>> 1;
496 last[2] = (last[1] + last[3]) >> 1;
497
498 t1 = ctx->D[0] + ctx->D[1];
499 ctx->D[0] = t1 >> 1;
500 ctx->D[1] = t1 - (t1 >> 1);
501 t2 = ctx->D[2] + ctx->D[3];
502 ctx->D[2] = t2 >> 1;
503 ctx->D[3] = t2 - (t2 >> 1);
504
505 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
506}
507
508static inline void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
509{
510 int i;
511 int ct;
512 int left, right, diff;
513 int deltas[16];
514 TM2_INIT_POINTERS();
515
516 /* null chroma */
517 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
518 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
519
520 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
521 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
522
523 /* null luma */
524 for(i = 0; i < 16; i++)
525 deltas[i] = 0;
526
527 ct = ctx->D[0] + ctx->D[1] + ctx->D[2] + ctx->D[3];
528
529 if(bx > 0)
530 left = last[-1] - ct;
531 else
532 left = 0;
533
534 right = last[3];
535 diff = right - left;
536 last[0] = left + (diff >> 2);
537 last[1] = left + (diff >> 1);
538 last[2] = right - (diff >> 2);
539 last[3] = right;
540 {
541 int tp = left;
542
543 ctx->D[0] = (tp + (ct >> 2)) - left;
544 left += ctx->D[0];
545 ctx->D[1] = (tp + (ct >> 1)) - left;
546 left += ctx->D[1];
547 ctx->D[2] = ((tp + ct) - (ct >> 2)) - left;
548 left += ctx->D[2];
549 ctx->D[3] = (tp + ct) - left;
550 }
551 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
552}
553
554static inline void tm2_still_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
555{
556 int i, j;
557 TM2_INIT_POINTERS_2();
558
559 /* update chroma */
560 for(j = 0; j < 2; j++){
561 for(i = 0; i < 2; i++){
562 U[i] = Uo[i];
563 V[i] = Vo[i];
564 }
565 U += Ustride; V += Vstride;
566 Uo += oUstride; Vo += oVstride;
567 }
568 U -= Ustride * 2;
569 V -= Vstride * 2;
570 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
571 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
572
573 /* update deltas */
574 ctx->D[0] = Yo[3] - last[3];
575 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
576 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
577 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
578
579 for(j = 0; j < 4; j++){
580 for(i = 0; i < 4; i++){
581 Y[i] = Yo[i];
582 last[i] = Yo[i];
583 }
584 Y += Ystride;
585 Yo += oYstride;
586 }
587}
588
589static inline void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
590{
591 int i, j;
592 int d;
593 TM2_INIT_POINTERS_2();
594
595 /* update chroma */
596 for(j = 0; j < 2; j++){
597 for(i = 0; i < 2; i++){
598 U[i] = Uo[i] + GET_TOK(ctx, TM2_UPD);
599 V[i] = Vo[i] + GET_TOK(ctx, TM2_UPD);
600 }
601 U += Ustride; V += Vstride;
602 Uo += oUstride; Vo += oVstride;
603 }
604 U -= Ustride * 2;
605 V -= Vstride * 2;
606 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
607 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
608
609 /* update deltas */
610 ctx->D[0] = Yo[3] - last[3];
611 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
612 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
613 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
614
615 for(j = 0; j < 4; j++){
616 d = last[3];
617 for(i = 0; i < 4; i++){
618 Y[i] = Yo[i] + GET_TOK(ctx, TM2_UPD);
619 last[i] = Y[i];
620 }
621 ctx->D[j] = last[3] - d;
622 Y += Ystride;
623 Yo += oYstride;
624 }
625}
626
627static inline void tm2_motion_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
628{
629 int i, j;
630 int mx, my;
631 TM2_INIT_POINTERS_2();
632
633 mx = GET_TOK(ctx, TM2_MOT);
634 my = GET_TOK(ctx, TM2_MOT);
635
636 Yo += my * oYstride + mx;
637 Uo += (my >> 1) * oUstride + (mx >> 1);
638 Vo += (my >> 1) * oVstride + (mx >> 1);
639
640 /* copy chroma */
641 for(j = 0; j < 2; j++){
642 for(i = 0; i < 2; i++){
643 U[i] = Uo[i];
644 V[i] = Vo[i];
645 }
646 U += Ustride; V += Vstride;
647 Uo += oUstride; Vo += oVstride;
648 }
649 U -= Ustride * 2;
650 V -= Vstride * 2;
651 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
652 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
653
654 /* copy luma */
655 for(j = 0; j < 4; j++){
656 for(i = 0; i < 4; i++){
657 Y[i] = Yo[i];
658 }
659 Y += Ystride;
660 Yo += oYstride;
661 }
662 /* calculate deltas */
663 Y -= Ystride * 4;
664 ctx->D[0] = Y[3] - last[3];
665 ctx->D[1] = Y[3 + Ystride] - Y[3];
666 ctx->D[2] = Y[3 + Ystride * 2] - Y[3 + Ystride];
667 ctx->D[3] = Y[3 + Ystride * 3] - Y[3 + Ystride * 2];
668 for(i = 0; i < 4; i++)
669 last[i] = Y[i + Ystride * 3];
670}
671
672static int tm2_decode_blocks(TM2Context *ctx, AVFrame *p)
673{
674 int i, j;
675 int bw, bh;
676 int type;
677 int keyframe = 1;
678 uint8_t *Y, *U, *V;
679 int *src;
680
681 bw = ctx->avctx->width >> 2;
682 bh = ctx->avctx->height >> 2;
683
684 for(i = 0; i < TM2_NUM_STREAMS; i++)
685 ctx->tok_ptrs[i] = 0;
686
687 if (ctx->tok_lens[TM2_TYPE]<bw*bh){
688 av_log(ctx->avctx,AV_LOG_ERROR,"Got %i tokens for %i blocks\n",ctx->tok_lens[TM2_TYPE],bw*bh);
689 return -1;
690 }
691
692 memset(ctx->last, 0, 4 * bw * sizeof(int));
693 memset(ctx->clast, 0, 4 * bw * sizeof(int));
694
695 for(j = 0; j < bh; j++) {
696 memset(ctx->D, 0, 4 * sizeof(int));
697 memset(ctx->CD, 0, 4 * sizeof(int));
698 for(i = 0; i < bw; i++) {
699 type = GET_TOK(ctx, TM2_TYPE);
700 switch(type) {
701 case TM2_HI_RES:
702 tm2_hi_res_block(ctx, p, i, j);
703 break;
704 case TM2_MED_RES:
705 tm2_med_res_block(ctx, p, i, j);
706 break;
707 case TM2_LOW_RES:
708 tm2_low_res_block(ctx, p, i, j);
709 break;
710 case TM2_NULL_RES:
711 tm2_null_res_block(ctx, p, i, j);
712 break;
713 case TM2_UPDATE:
714 tm2_update_block(ctx, p, i, j);
715 keyframe = 0;
716 break;
717 case TM2_STILL:
718 tm2_still_block(ctx, p, i, j);
719 keyframe = 0;
720 break;
721 case TM2_MOTION:
722 tm2_motion_block(ctx, p, i, j);
723 keyframe = 0;
724 break;
725 default:
726 av_log(ctx->avctx, AV_LOG_ERROR, "Skipping unknown block type %i\n", type);
727 }
728 }
729 }
730
731 /* copy data from our buffer to AVFrame */
732 Y = p->data[0];
733 src = (ctx->cur?ctx->Y2:ctx->Y1);
734 for(j = 0; j < ctx->avctx->height; j++){
735 for(i = 0; i < ctx->avctx->width; i++){
736 Y[i] = clip_uint8(*src++);
737 }
738 Y += p->linesize[0];
739 }
740 U = p->data[2];
741 src = (ctx->cur?ctx->U2:ctx->U1);
742 for(j = 0; j < (ctx->avctx->height + 1) >> 1; j++){
743 for(i = 0; i < (ctx->avctx->width + 1) >> 1; i++){
744 U[i] = clip_uint8(*src++);
745 }
746 U += p->linesize[2];
747 }
748 V = p->data[1];
749 src = (ctx->cur?ctx->V2:ctx->V1);
750 for(j = 0; j < (ctx->avctx->height + 1) >> 1; j++){
751 for(i = 0; i < (ctx->avctx->width + 1) >> 1; i++){
752 V[i] = clip_uint8(*src++);
753 }
754 V += p->linesize[1];
755 }
756
757 return keyframe;
758}
759
760static int decode_frame(AVCodecContext *avctx,
761 void *data, int *data_size,
762 uint8_t *buf, int buf_size)
763{
764 TM2Context * const l = avctx->priv_data;
765 AVFrame * const p= (AVFrame*)&l->pic;
766 int skip, t;
767
768 p->reference = 1;
769 p->buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
770 if(avctx->reget_buffer(avctx, p) < 0){
771 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
772 return -1;
773 }
774
775 l->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, buf_size >> 2);
776 skip = tm2_read_header(l, buf);
777
778 if(skip == -1)
779 return -1;
780
781 t = tm2_read_stream(l, buf + skip, TM2_C_HI);
782 if(t == -1)
783 return -1;
784 skip += t;
785 t = tm2_read_stream(l, buf + skip, TM2_C_LO);
786 if(t == -1)
787 return -1;
788 skip += t;
789 t = tm2_read_stream(l, buf + skip, TM2_L_HI);
790 if(t == -1)
791 return -1;
792 skip += t;
793 t = tm2_read_stream(l, buf + skip, TM2_L_LO);
794 if(t == -1)
795 return -1;
796 skip += t;
797 t = tm2_read_stream(l, buf + skip, TM2_UPD);
798 if(t == -1)
799 return -1;
800 skip += t;
801 t = tm2_read_stream(l, buf + skip, TM2_MOT);
802 if(t == -1)
803 return -1;
804 skip += t;
805 t = tm2_read_stream(l, buf + skip, TM2_TYPE);
806 if(t == -1)
807 return -1;
808 p->key_frame = tm2_decode_blocks(l, p);
809 if(p->key_frame)
810 p->pict_type = FF_I_TYPE;
811 else
812 p->pict_type = FF_P_TYPE;
813
814 l->cur = !l->cur;
815 *data_size = sizeof(AVFrame);
816 *(AVFrame*)data = l->pic;
817
818 return buf_size;
819}
820
821static int decode_init(AVCodecContext *avctx){
822 TM2Context * const l = avctx->priv_data;
823 int i;
824
825 if (avcodec_check_dimensions(avctx, avctx->height, avctx->width) < 0) {
826 return -1;
827 }
828 if((avctx->width & 3) || (avctx->height & 3)){
829 av_log(avctx, AV_LOG_ERROR, "Width and height must be multiple of 4\n");
830 return -1;
831 }
832
833 l->avctx = avctx;
834 l->pic.data[0]=NULL;
835 avctx->has_b_frames = 0;
836 avctx->pix_fmt = PIX_FMT_YUV420P;
837
838 dsputil_init(&l->dsp, avctx);
839
840 l->last = av_malloc(4 * sizeof(int) * (avctx->width >> 2));
841 l->clast = av_malloc(4 * sizeof(int) * (avctx->width >> 2));
842
843 for(i = 0; i < TM2_NUM_STREAMS; i++) {
844 l->tokens[i] = NULL;
845 l->tok_lens[i] = 0;
846 }
847
848 l->Y1 = av_malloc(sizeof(int) * avctx->width * avctx->height);
849 l->U1 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1));
850 l->V1 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1));
851 l->Y2 = av_malloc(sizeof(int) * avctx->width * avctx->height);
852 l->U2 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1));
853 l->V2 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1));
854 l->cur = 0;
855
856 return 0;
857}
858
859static int decode_end(AVCodecContext *avctx){
860 TM2Context * const l = avctx->priv_data;
861 int i;
862
863 if(l->last)
864 av_free(l->last);
865 if(l->clast)
866 av_free(l->clast);
867 for(i = 0; i < TM2_NUM_STREAMS; i++)
868 if(l->tokens[i])
869 av_free(l->tokens[i]);
870 if(l->Y1){
871 av_free(l->Y1);
872 av_free(l->U1);
873 av_free(l->V1);
874 av_free(l->Y2);
875 av_free(l->U2);
876 av_free(l->V2);
877 }
878 return 0;
879}
880
881AVCodec truemotion2_decoder = {
882 "truemotion2",
883 CODEC_TYPE_VIDEO,
884 CODEC_ID_TRUEMOTION2,
885 sizeof(TM2Context),
886 decode_init,
887 NULL,
888 decode_end,
889 decode_frame,
890 CODEC_CAP_DR1,
891};
Note: See TracBrowser for help on using the repository browser.

© 2024 Oracle Support Privacy / Do Not Sell My Info Terms of Use Trademark Policy Automated Access Etiquette