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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 */ | |
39 | enum 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 */ | |
51 | enum 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 | ||
61 | typedef 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 | */ | |
92 | typedef 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 | */ | |
102 | typedef 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 | ||
114 | static 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 | ||
145 | static 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 | } | |
212 | fail: | |
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 | ||
221 | static 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 | ||
228 | static 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 | ||
240 | static 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 | ||
257 | static 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 | ||
284 | static 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 | ||
388 | static 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 */ | |
441 | static 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 | ||
459 | static 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 | ||
472 | static 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 | ||
491 | static 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 | ||
512 | static 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 | ||
534 | static 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 | ||
575 | static 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 | ||
621 | static 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 | ||
656 | static 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 | ||
696 | static 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 | ||
750 | static 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 | ||
866 | static 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 | ||
872 | static 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 | ||
927 | static 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 | ||
991 | static 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 | ||
1016 | AVCodec 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 | }; |