FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/truemotion2.c
Date: 2026-01-14 03:33:33
Exec Total Coverage
Lines: 463 547 84.6%
Functions: 22 22 100.0%
Branches: 240 305 78.7%
Line Branch Exec Source
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 "libavutil/mem.h"
30 #include "avcodec.h"
31 #include "bswapdsp.h"
32 #include "bytestream.h"
33 #include "codec_internal.h"
34 #include "decode.h"
35 #include "get_bits.h"
36
37 #define TM2_ESCAPE 0x80000000
38 #define TM2_DELTAS 64
39
40 /* Huffman-coded streams of different types of blocks */
41 enum TM2_STREAMS {
42 TM2_C_HI = 0,
43 TM2_C_LO,
44 TM2_L_HI,
45 TM2_L_LO,
46 TM2_UPD,
47 TM2_MOT,
48 TM2_TYPE,
49 TM2_NUM_STREAMS
50 };
51
52 /* Block types */
53 enum TM2_BLOCKS {
54 TM2_HI_RES = 0,
55 TM2_MED_RES,
56 TM2_LOW_RES,
57 TM2_NULL_RES,
58 TM2_UPDATE,
59 TM2_STILL,
60 TM2_MOTION
61 };
62
63 typedef struct TM2Context {
64 AVCodecContext *avctx;
65 AVFrame *pic;
66
67 GetBitContext gb;
68 int error;
69 BswapDSPContext bdsp;
70
71 uint8_t *buffer;
72 int buffer_size;
73
74 /* TM2 streams */
75 int *tokens[TM2_NUM_STREAMS];
76 int tok_lens[TM2_NUM_STREAMS];
77 int tok_ptrs[TM2_NUM_STREAMS];
78 int deltas[TM2_NUM_STREAMS][TM2_DELTAS];
79 /* for blocks decoding */
80 int D[4];
81 int CD[4];
82 int *last;
83 int *clast;
84
85 /* data for current and previous frame */
86 int *Y_base, *UV_base;
87 int *Y1, *U1, *V1, *Y2, *U2, *V2;
88 int y_stride, uv_stride;
89 int cur;
90 } TM2Context;
91
92 /**
93 * Huffman codes for each of streams
94 */
95 typedef struct TM2Codes {
96 VLC vlc; ///< table for FFmpeg bitstream reader
97 int bits;
98 int *recode; ///< table for converting from code indexes to values
99 int length;
100 } TM2Codes;
101
102 /**
103 * structure for gathering Huffman codes information
104 */
105 typedef struct TM2Huff {
106 int val_bits; ///< length of literal
107 int max_bits; ///< maximum length of code
108 int min_bits; ///< minimum length of code
109 int nodes; ///< total number of nodes in tree
110 int num; ///< current number filled
111 int max_num; ///< total number of codes
112 int *nums; ///< literals
113 uint8_t *lens; ///< codelengths
114 } TM2Huff;
115
116 /**
117 *
118 * @returns the length of the longest code or an AVERROR code
119 */
120 3148 static int tm2_read_tree(TM2Context *ctx, int length, TM2Huff *huff)
121 {
122 int ret, ret2;
123
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 3148 if (length > huff->max_bits) {
124 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "Tree exceeded its given depth (%i)\n",
125 huff->max_bits);
126 ✗ return AVERROR_INVALIDDATA;
127 }
128
129
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 3148 if (!get_bits1(&ctx->gb)) { /* literal */
130
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 1670 if (length == 0) {
131 3 length = 1;
132 }
133
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 1670 if (huff->num >= huff->max_num) {
134 ✗ av_log(ctx->avctx, AV_LOG_DEBUG, "Too many literals\n");
135 ✗ return AVERROR_INVALIDDATA;
136 }
137 1670 huff->nums[huff->num] = get_bits_long(&ctx->gb, huff->val_bits);
138 1670 huff->lens[huff->num] = length;
139 1670 huff->num++;
140 1670 return length;
141 } else { /* non-terminal node */
142
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 1478 if ((ret2 = tm2_read_tree(ctx, length + 1, huff)) < 0)
143 ✗ return ret2;
144
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 1478 if ((ret = tm2_read_tree(ctx, length + 1, huff)) < 0)
145 ✗ return ret;
146 }
147 1478 return FFMAX(ret, ret2);
148 }
149
150 192 static int tm2_build_huff_table(TM2Context *ctx, TM2Codes *code)
151 {
152 TM2Huff huff;
153 192 int res = 0;
154
155 192 huff.val_bits = get_bits(&ctx->gb, 5);
156 192 huff.max_bits = get_bits(&ctx->gb, 5);
157 192 huff.min_bits = get_bits(&ctx->gb, 5);
158 192 huff.nodes = get_bits(&ctx->gb, 17);
159 192 huff.num = 0;
160
161 /* check for correct codes parameters */
162
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 192 if ((huff.val_bits < 1) || (huff.val_bits > 32) ||
163
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 192 (huff.max_bits < 0) || (huff.max_bits > 25)) {
164 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect tree parameters - literal "
165 "length: %i, max code length: %i\n", huff.val_bits, huff.max_bits);
166 ✗ return AVERROR_INVALIDDATA;
167 }
168
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 192 if ((huff.nodes <= 0) || (huff.nodes > 0x10000)) {
169 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of Huffman tree "
170 "nodes: %i\n", huff.nodes);
171 ✗ return AVERROR_INVALIDDATA;
172 }
173 /* one-node tree */
174
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 192 if (huff.max_bits == 0)
175 3 huff.max_bits = 1;
176
177 /* allocate space for codes - it is exactly ceil(nodes / 2) entries */
178 192 huff.max_num = (huff.nodes + 1) >> 1;
179 192 huff.nums = av_calloc(huff.max_num, sizeof(int));
180 192 huff.lens = av_mallocz(huff.max_num);
181
182
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 192 if (!huff.nums || !huff.lens) {
183 ✗ res = AVERROR(ENOMEM);
184 ✗ goto out;
185 }
186
187 192 res = tm2_read_tree(ctx, 0, &huff);
188
189
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 192 if (res >= 0 && res != huff.max_bits) {
190 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "Got less bits than expected: %i of %i\n",
191 res, huff.max_bits);
192 ✗ res = AVERROR_INVALIDDATA;
193 }
194
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 192 if (huff.num != huff.max_num) {
195 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "Got less codes than expected: %i of %i\n",
196 huff.num, huff.max_num);
197 ✗ res = AVERROR_INVALIDDATA;
198 }
199
200 /* convert codes to vlc_table */
201
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 192 if (res >= 0) {
202 192 res = ff_vlc_init_from_lengths(&code->vlc, huff.max_bits, huff.max_num,
203 192 huff.lens, sizeof(huff.lens[0]),
204 192 NULL, 0, 0, 0, 0, ctx->avctx);
205
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 192 if (res < 0)
206 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "Cannot build VLC table\n");
207 else {
208 192 code->bits = huff.max_bits;
209 192 code->length = huff.max_num;
210 192 code->recode = huff.nums;
211 192 huff.nums = NULL;
212 }
213 }
214
215 ✗ out:
216 /* free allocated memory */
217 192 av_free(huff.nums);
218 192 av_free(huff.lens);
219
220 192 return res;
221 }
222
223 192 static void tm2_free_codes(TM2Codes *code)
224 {
225 192 av_free(code->recode);
226 192 ff_vlc_free(&code->vlc);
227 192 }
228
229 2353240 static inline int tm2_get_token(GetBitContext *gb, TM2Codes *code)
230 {
231 int val;
232 2353240 val = get_vlc2(gb, code->vlc.table, code->bits, 1);
233
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 2353240 if(val<0)
234 ✗ return -1;
235 2353240 return code->recode[val];
236 }
237
238 #define TM2_OLD_HEADER_MAGIC 0x00000100
239 #define TM2_NEW_HEADER_MAGIC 0x00000101
240
241 30 static inline int tm2_read_header(TM2Context *ctx, const uint8_t *buf)
242 {
243 30 uint32_t magic = AV_RL32(buf);
244
245
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 30 switch (magic) {
246 ✗ case TM2_OLD_HEADER_MAGIC:
247 ✗ avpriv_request_sample(ctx->avctx, "Old TM2 header");
248 ✗ return 0;
249 30 case TM2_NEW_HEADER_MAGIC:
250 30 return 0;
251 ✗ default:
252 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "Not a TM2 header: 0x%08"PRIX32"\n",
253 magic);
254 ✗ return AVERROR_INVALIDDATA;
255 }
256 }
257
258 29 static int tm2_read_deltas(TM2Context *ctx, int stream_id)
259 {
260 int d, mb;
261 int i, v;
262
263 29 d = get_bits(&ctx->gb, 9);
264 29 mb = get_bits(&ctx->gb, 5);
265
266 av_assert2(mb < 32);
267
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 29 if ((d < 1) || (d > TM2_DELTAS) || (mb < 1)) {
268 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect delta table: %i deltas x %i bits\n", d, mb);
269 ✗ return AVERROR_INVALIDDATA;
270 }
271
272
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 594 for (i = 0; i < d; i++) {
273 565 v = get_bits_long(&ctx->gb, mb);
274
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 565 if (v & (1 << (mb - 1)))
275 270 ctx->deltas[stream_id][i] = v - (1U << mb);
276 else
277 295 ctx->deltas[stream_id][i] = v;
278 }
279
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 1320 for (; i < TM2_DELTAS; i++)
280 1291 ctx->deltas[stream_id][i] = 0;
281
282 29 return 0;
283 }
284
285 210 static int tm2_read_stream(TM2Context *ctx, const uint8_t *buf, int stream_id, int buf_size)
286 {
287 int i, ret;
288 210 int skip = 0;
289 int len, toks, pos;
290 TM2Codes codes;
291 GetByteContext gb;
292
293
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 210 if (buf_size < 4) {
294 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "not enough space for len left\n");
295 ✗ return AVERROR_INVALIDDATA;
296 }
297
298 /* get stream length in dwords */
299 210 bytestream2_init(&gb, buf, buf_size);
300 210 len = bytestream2_get_be32(&gb);
301
302
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 210 if (len == 0)
303 18 return 4;
304
305
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 192 if (len >= INT_MAX / 4 - 1 || len < 0 || len * 4 + 4 > buf_size) {
306 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "Error, invalid stream size.\n");
307 ✗ return AVERROR_INVALIDDATA;
308 }
309 192 skip = len * 4 + 4;
310
311 192 toks = bytestream2_get_be32(&gb);
312
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 192 if (toks & 1) {
313 162 len = bytestream2_get_be32(&gb);
314
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 162 if (len == TM2_ESCAPE) {
315 5 len = bytestream2_get_be32(&gb);
316 }
317
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 162 if (len > 0) {
318 29 pos = bytestream2_tell(&gb);
319
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 29 if (skip <= pos)
320 ✗ return AVERROR_INVALIDDATA;
321 29 init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
322
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 29 if ((ret = tm2_read_deltas(ctx, stream_id)) < 0)
323 ✗ return ret;
324 29 bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2);
325 }
326 }
327 /* skip unused fields */
328 192 len = bytestream2_get_be32(&gb);
329
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 192 if (len == TM2_ESCAPE) { /* some unknown length - could be escaped too */
330 ✗ bytestream2_skip(&gb, 8); /* unused by decoder */
331 } else {
332 192 bytestream2_skip(&gb, 4); /* unused by decoder */
333 }
334
335 192 pos = bytestream2_tell(&gb);
336
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 192 if (skip <= pos)
337 ✗ return AVERROR_INVALIDDATA;
338 192 init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
339
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 192 if ((ret = tm2_build_huff_table(ctx, &codes)) < 0)
340 ✗ return ret;
341 192 bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2);
342
343 192 toks >>= 1;
344 /* check if we have sane number of tokens */
345
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 192 if ((toks < 0) || (toks > 0xFFFFFF)) {
346 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
347 ✗ ret = AVERROR_INVALIDDATA;
348 ✗ goto end;
349 }
350 192 ret = av_reallocp_array(&ctx->tokens[stream_id], toks, sizeof(int));
351
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 192 if (ret < 0) {
352 ✗ ctx->tok_lens[stream_id] = 0;
353 ✗ goto end;
354 }
355 192 ctx->tok_lens[stream_id] = toks;
356 192 len = bytestream2_get_be32(&gb);
357
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 192 if (len > 0) {
358 189 pos = bytestream2_tell(&gb);
359
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 189 if (skip <= pos) {
360 ✗ ret = AVERROR_INVALIDDATA;
361 ✗ goto end;
362 }
363 189 init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
364
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 2353429 for (i = 0; i < toks; i++) {
365
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 2353240 if (get_bits_left(&ctx->gb) <= 0) {
366 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
367 ✗ ret = AVERROR_INVALIDDATA;
368 ✗ goto end;
369 }
370 2353240 ctx->tokens[stream_id][i] = tm2_get_token(&ctx->gb, &codes);
371
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 2353240 if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS || ctx->tokens[stream_id][i]<0) {
372 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n",
373 ✗ ctx->tokens[stream_id][i], stream_id, i);
374 ✗ ret = AVERROR_INVALIDDATA;
375 ✗ goto end;
376 }
377 }
378 } else {
379
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 3 if (len < 0) {
380 ✗ ret = AVERROR_INVALIDDATA;
381 ✗ goto end;
382 }
383
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 21 for (i = 0; i < toks; i++) {
384 18 ctx->tokens[stream_id][i] = codes.recode[0];
385
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 18 if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS) {
386 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n",
387 ✗ ctx->tokens[stream_id][i], stream_id, i);
388 ✗ ret = AVERROR_INVALIDDATA;
389 ✗ goto end;
390 }
391 }
392 }
393
394 192 ret = skip;
395
396 192 end:
397 192 tm2_free_codes(&codes);
398 192 return ret;
399 }
400
401 2353258 static inline int GET_TOK(TM2Context *ctx,int type)
402 {
403
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 2353258 if (ctx->tok_ptrs[type] >= ctx->tok_lens[type]) {
404 ✗ 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]);
405 ✗ ctx->error = 1;
406 ✗ return 0;
407 }
408
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 2353258 if (type <= TM2_MOT) {
409
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 2209258 if (ctx->tokens[type][ctx->tok_ptrs[type]] >= TM2_DELTAS) {
410 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "token %d is too large\n", ctx->tokens[type][ctx->tok_ptrs[type]]);
411 ✗ return 0;
412 }
413 2209258 return ctx->deltas[type][ctx->tokens[type][ctx->tok_ptrs[type]++]];
414 }
415 144000 return ctx->tokens[type][ctx->tok_ptrs[type]++];
416 }
417
418 /* blocks decoding routines */
419
420 /* common Y, U, V pointers initialisation */
421 #define TM2_INIT_POINTERS() \
422 int *last, *clast; \
423 int *Y, *U, *V;\
424 int Ystride, Ustride, Vstride;\
425 \
426 Ystride = ctx->y_stride;\
427 Vstride = ctx->uv_stride;\
428 Ustride = ctx->uv_stride;\
429 Y = (ctx->cur?ctx->Y2:ctx->Y1) + by * 4 * Ystride + bx * 4;\
430 V = (ctx->cur?ctx->V2:ctx->V1) + by * 2 * Vstride + bx * 2;\
431 U = (ctx->cur?ctx->U2:ctx->U1) + by * 2 * Ustride + bx * 2;\
432 last = ctx->last + bx * 4;\
433 clast = ctx->clast + bx * 4;
434
435 #define TM2_INIT_POINTERS_2() \
436 unsigned *Yo, *Uo, *Vo;\
437 int oYstride, oUstride, oVstride;\
438 \
439 TM2_INIT_POINTERS();\
440 oYstride = Ystride;\
441 oVstride = Vstride;\
442 oUstride = Ustride;\
443 Yo = (ctx->cur?ctx->Y1:ctx->Y2) + by * 4 * oYstride + bx * 4;\
444 Vo = (ctx->cur?ctx->V1:ctx->V2) + by * 2 * oVstride + bx * 2;\
445 Uo = (ctx->cur?ctx->U1:ctx->U2) + by * 2 * oUstride + bx * 2;
446
447 /* recalculate last and delta values for next blocks */
448 #define TM2_RECALC_BLOCK(CHR, stride, last, CD) {\
449 CD[0] = (unsigned)CHR[ 1] - (unsigned)last[1];\
450 CD[1] = (unsigned)CHR[stride + 1] - (unsigned) CHR[1];\
451 last[0] = (int)CHR[stride + 0];\
452 last[1] = (int)CHR[stride + 1];}
453
454 /* common operations - add deltas to 4x4 block of luma or 2x2 blocks of chroma */
455 116660 static inline void tm2_apply_deltas(TM2Context *ctx, int* Y, int stride, int *deltas, int *last)
456 {
457 unsigned ct, d;
458 int i, j;
459
460
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 583300 for (j = 0; j < 4; j++){
461 466640 ct = ctx->D[j];
462
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 2333200 for (i = 0; i < 4; i++){
463 1866560 d = deltas[i + j * 4];
464 1866560 ct += d;
465 1866560 last[i] += ct;
466 1866560 Y[i] = av_clip_uint8(last[i]);
467 }
468 466640 Y += stride;
469 466640 ctx->D[j] = ct;
470 }
471 116660 }
472
473 233320 static inline void tm2_high_chroma(int *data, int stride, int *last, unsigned *CD, int *deltas)
474 {
475 int i, j;
476
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 699960 for (j = 0; j < 2; j++) {
477
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 1399920 for (i = 0; i < 2; i++) {
478 933280 CD[j] += deltas[i + j * 2];
479 933280 last[i] += CD[j];
480 933280 data[i] = last[i];
481 }
482 466640 data += stride;
483 }
484 233320 }
485
486 99888 static inline void tm2_low_chroma(int *data, int stride, int *clast, unsigned *CD, int *deltas, int bx)
487 {
488 int t;
489 int l;
490 int prev;
491
492
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 99888 if (bx > 0)
493 99060 prev = clast[-3];
494 else
495 828 prev = 0;
496 99888 t = (int)(CD[0] + CD[1]) >> 1;
497 99888 l = (int)(prev - CD[0] - CD[1] + clast[1]) >> 1;
498 99888 CD[1] = CD[0] + CD[1] - t;
499 99888 CD[0] = t;
500 99888 clast[0] = l;
501
502 99888 tm2_high_chroma(data, stride, clast, CD, deltas);
503 99888 }
504
505 66716 static inline void tm2_hi_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
506 {
507 int i;
508 int deltas[16];
509
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 66716 TM2_INIT_POINTERS();
510
511 /* hi-res chroma */
512
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 333580 for (i = 0; i < 4; i++) {
513 266864 deltas[i] = GET_TOK(ctx, TM2_C_HI);
514 266864 deltas[i + 4] = GET_TOK(ctx, TM2_C_HI);
515 }
516 66716 tm2_high_chroma(U, Ustride, clast, ctx->CD, deltas);
517 66716 tm2_high_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas + 4);
518
519 /* hi-res luma */
520
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 1134172 for (i = 0; i < 16; i++)
521 1067456 deltas[i] = GET_TOK(ctx, TM2_L_HI);
522
523 66716 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
524 66716 }
525
526 22463 static inline void tm2_med_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
527 {
528 int i;
529 int deltas[16];
530
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 22463 TM2_INIT_POINTERS();
531
532 /* low-res chroma */
533 22463 deltas[0] = GET_TOK(ctx, TM2_C_LO);
534 22463 deltas[1] = deltas[2] = deltas[3] = 0;
535 22463 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
536
537 22463 deltas[0] = GET_TOK(ctx, TM2_C_LO);
538 22463 deltas[1] = deltas[2] = deltas[3] = 0;
539 22463 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
540
541 /* hi-res luma */
542
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 381871 for (i = 0; i < 16; i++)
543 359408 deltas[i] = GET_TOK(ctx, TM2_L_HI);
544
545 22463 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
546 22463 }
547
548 12092 static inline void tm2_low_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
549 {
550 int i;
551 int t1, t2;
552 int deltas[16];
553
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 12092 TM2_INIT_POINTERS();
554
555 /* low-res chroma */
556 12092 deltas[0] = GET_TOK(ctx, TM2_C_LO);
557 12092 deltas[1] = deltas[2] = deltas[3] = 0;
558 12092 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
559
560 12092 deltas[0] = GET_TOK(ctx, TM2_C_LO);
561 12092 deltas[1] = deltas[2] = deltas[3] = 0;
562 12092 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
563
564 /* low-res luma */
565
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 205564 for (i = 0; i < 16; i++)
566 193472 deltas[i] = 0;
567
568 12092 deltas[ 0] = GET_TOK(ctx, TM2_L_LO);
569 12092 deltas[ 2] = GET_TOK(ctx, TM2_L_LO);
570 12092 deltas[ 8] = GET_TOK(ctx, TM2_L_LO);
571 12092 deltas[10] = GET_TOK(ctx, TM2_L_LO);
572
573
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 12092 if (bx > 0)
574 12025 last[0] = (int)((unsigned)last[-1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3] + last[1]) >> 1;
575 else
576 67 last[0] = (int)((unsigned)last[1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3])>> 1;
577 12092 last[2] = (int)((unsigned)last[1] + last[3]) >> 1;
578
579 12092 t1 = ctx->D[0] + (unsigned)ctx->D[1];
580 12092 ctx->D[0] = t1 >> 1;
581 12092 ctx->D[1] = t1 - (t1 >> 1);
582 12092 t2 = ctx->D[2] + (unsigned)ctx->D[3];
583 12092 ctx->D[2] = t2 >> 1;
584 12092 ctx->D[3] = t2 - (t2 >> 1);
585
586 12092 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
587 12092 }
588
589 15389 static inline void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
590 {
591 int i;
592 int ct;
593 unsigned left, right;
594 int diff;
595 int deltas[16];
596
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 15389 TM2_INIT_POINTERS();
597
598 /* null chroma */
599 15389 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
600 15389 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
601
602 15389 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
603 15389 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
604
605 /* null luma */
606
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 261613 for (i = 0; i < 16; i++)
607 246224 deltas[i] = 0;
608
609 15389 ct = (unsigned)ctx->D[0] + ctx->D[1] + ctx->D[2] + ctx->D[3];
610
611
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 15389 if (bx > 0)
612 15315 left = last[-1] - (unsigned)ct;
613 else
614 74 left = 0;
615
616 15389 right = last[3];
617 15389 diff = right - left;
618 15389 last[0] = left + (diff >> 2);
619 15389 last[1] = left + (diff >> 1);
620 15389 last[2] = right - (diff >> 2);
621 15389 last[3] = right;
622 {
623 15389 unsigned tp = left;
624
625 15389 ctx->D[0] = (tp + (ct >> 2)) - left;
626 15389 left += ctx->D[0];
627 15389 ctx->D[1] = (tp + (ct >> 1)) - left;
628 15389 left += ctx->D[1];
629 15389 ctx->D[2] = ((tp + ct) - (ct >> 2)) - left;
630 15389 left += ctx->D[2];
631 15389 ctx->D[3] = (tp + ct) - left;
632 }
633 15389 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
634 15389 }
635
636 20959 static inline void tm2_still_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
637 {
638 int i, j;
639
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 20959 TM2_INIT_POINTERS_2();
640
641 /* update chroma */
642
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643
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 125754 for (i = 0; i < 2; i++){
644 83836 U[i] = Uo[i];
645 83836 V[i] = Vo[i];
646 }
647 41918 U += Ustride; V += Vstride;
648 41918 Uo += oUstride; Vo += oVstride;
649 }
650 20959 U -= Ustride * 2;
651 20959 V -= Vstride * 2;
652 20959 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
653 20959 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
654
655 /* update deltas */
656 20959 ctx->D[0] = Yo[3] - last[3];
657 20959 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
658 20959 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
659 20959 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
660
661
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662
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 419180 for (i = 0; i < 4; i++) {
663 335344 Y[i] = Yo[i];
664 335344 last[i] = Yo[i];
665 }
666 83836 Y += Ystride;
667 83836 Yo += oYstride;
668 }
669 20959 }
670
671 5383 static inline void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
672 {
673 int i, j;
674 unsigned d;
675
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 5383 TM2_INIT_POINTERS_2();
676
677 /* update chroma */
678
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679
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 32298 for (i = 0; i < 2; i++) {
680 21532 U[i] = Uo[i] + GET_TOK(ctx, TM2_UPD);
681 21532 V[i] = Vo[i] + GET_TOK(ctx, TM2_UPD);
682 }
683 10766 U += Ustride;
684 10766 V += Vstride;
685 10766 Uo += oUstride;
686 10766 Vo += oVstride;
687 }
688 5383 U -= Ustride * 2;
689 5383 V -= Vstride * 2;
690 5383 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
691 5383 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
692
693 /* update deltas */
694 5383 ctx->D[0] = Yo[3] - last[3];
695 5383 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
696 5383 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
697 5383 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
698
699
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 26915 for (j = 0; j < 4; j++) {
700 21532 d = last[3];
701
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 107660 for (i = 0; i < 4; i++) {
702 86128 Y[i] = Yo[i] + (unsigned)GET_TOK(ctx, TM2_UPD);
703 86128 last[i] = Y[i];
704 }
705 21532 ctx->D[j] = last[3] - d;
706 21532 Y += Ystride;
707 21532 Yo += oYstride;
708 }
709 5383 }
710
711 998 static inline void tm2_motion_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
712 {
713 int i, j;
714 int mx, my;
715
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 998 TM2_INIT_POINTERS_2();
716
717 998 mx = GET_TOK(ctx, TM2_MOT);
718 998 my = GET_TOK(ctx, TM2_MOT);
719 998 mx = av_clip(mx, -(bx * 4 + 4), ctx->avctx->width - bx * 4);
720 998 my = av_clip(my, -(by * 4 + 4), ctx->avctx->height - by * 4);
721
722
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 998 if (4*bx+mx<0 || 4*by+my<0 || 4*bx+mx+4 > ctx->avctx->width || 4*by+my+4 > ctx->avctx->height) {
723 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "MV out of picture\n");
724 ✗ return;
725 }
726
727 998 Yo += my * oYstride + mx;
728 998 Uo += (my >> 1) * oUstride + (mx >> 1);
729 998 Vo += (my >> 1) * oVstride + (mx >> 1);
730
731 /* copy chroma */
732
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733
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 5988 for (i = 0; i < 2; i++) {
734 3992 U[i] = Uo[i];
735 3992 V[i] = Vo[i];
736 }
737 1996 U += Ustride;
738 1996 V += Vstride;
739 1996 Uo += oUstride;
740 1996 Vo += oVstride;
741 }
742 998 U -= Ustride * 2;
743 998 V -= Vstride * 2;
744 998 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
745 998 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
746
747 /* copy luma */
748
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 4990 for (j = 0; j < 4; j++) {
749
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 19960 for (i = 0; i < 4; i++) {
750 15968 Y[i] = Yo[i];
751 }
752 3992 Y += Ystride;
753 3992 Yo += oYstride;
754 }
755 /* calculate deltas */
756 998 Y -= Ystride * 4;
757 998 ctx->D[0] = (unsigned)Y[3] - last[3];
758 998 ctx->D[1] = (unsigned)Y[3 + Ystride] - Y[3];
759 998 ctx->D[2] = (unsigned)Y[3 + Ystride * 2] - Y[3 + Ystride];
760 998 ctx->D[3] = (unsigned)Y[3 + Ystride * 3] - Y[3 + Ystride * 2];
761
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 4990 for (i = 0; i < 4; i++)
762 3992 last[i] = Y[i + Ystride * 3];
763 }
764
765 30 static int tm2_decode_blocks(TM2Context *ctx, AVFrame *p)
766 {
767 int i, j;
768 30 int w = ctx->avctx->width, h = ctx->avctx->height, bw = w >> 2, bh = h >> 2, cw = w >> 1;
769 int type;
770 30 int keyframe = 1;
771 int *Y, *U, *V;
772 uint8_t *dst;
773
774
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 240 for (i = 0; i < TM2_NUM_STREAMS; i++)
775 210 ctx->tok_ptrs[i] = 0;
776
777
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 30 if (ctx->tok_lens[TM2_TYPE]<bw*bh) {
778 ✗ av_log(ctx->avctx,AV_LOG_ERROR,"Got %i tokens for %i blocks\n",ctx->tok_lens[TM2_TYPE],bw*bh);
779 ✗ return AVERROR_INVALIDDATA;
780 }
781
782 30 memset(ctx->last, 0, 4 * bw * sizeof(int));
783 30 memset(ctx->clast, 0, 4 * bw * sizeof(int));
784
785
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 1830 for (j = 0; j < bh; j++) {
786 1800 memset(ctx->D, 0, 4 * sizeof(int));
787 1800 memset(ctx->CD, 0, 4 * sizeof(int));
788
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 145800 for (i = 0; i < bw; i++) {
789 144000 type = GET_TOK(ctx, TM2_TYPE);
790
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 144000 switch(type) {
791 66716 case TM2_HI_RES:
792 66716 tm2_hi_res_block(ctx, p, i, j);
793 66716 break;
794 22463 case TM2_MED_RES:
795 22463 tm2_med_res_block(ctx, p, i, j);
796 22463 break;
797 12092 case TM2_LOW_RES:
798 12092 tm2_low_res_block(ctx, p, i, j);
799 12092 break;
800 15389 case TM2_NULL_RES:
801 15389 tm2_null_res_block(ctx, p, i, j);
802 15389 break;
803 5383 case TM2_UPDATE:
804 5383 tm2_update_block(ctx, p, i, j);
805 5383 keyframe = 0;
806 5383 break;
807 20959 case TM2_STILL:
808 20959 tm2_still_block(ctx, p, i, j);
809 20959 keyframe = 0;
810 20959 break;
811 998 case TM2_MOTION:
812 998 tm2_motion_block(ctx, p, i, j);
813 998 keyframe = 0;
814 998 break;
815 ✗ default:
816 ✗ av_log(ctx->avctx, AV_LOG_ERROR, "Skipping unknown block type %i\n", type);
817 }
818
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 144000 if (ctx->error)
819 ✗ return AVERROR_INVALIDDATA;
820 }
821 }
822
823 /* copy data from our buffer to AVFrame */
824
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 30 Y = (ctx->cur?ctx->Y2:ctx->Y1);
825
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 30 U = (ctx->cur?ctx->U2:ctx->U1);
826
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 30 V = (ctx->cur?ctx->V2:ctx->V1);
827 30 dst = p->data[0];
828
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829
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 2311200 for (i = 0; i < w; i++) {
830 2304000 unsigned y = Y[i], u = U[i >> 1], v = V[i >> 1];
831 2304000 dst[3*i+0] = av_clip_uint8(y + v);
832 2304000 dst[3*i+1] = av_clip_uint8(y);
833 2304000 dst[3*i+2] = av_clip_uint8(y + u);
834 }
835
836 /* horizontal edge extension */
837 7200 Y[-4] = Y[-3] = Y[-2] = Y[-1] = Y[0];
838 7200 Y[w + 3] = Y[w + 2] = Y[w + 1] = Y[w] = Y[w - 1];
839
840 /* vertical edge extension */
841
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 7200 if (j == 0) {
842 30 memcpy(Y - 4 - 1 * ctx->y_stride, Y - 4, ctx->y_stride);
843 30 memcpy(Y - 4 - 2 * ctx->y_stride, Y - 4, ctx->y_stride);
844 30 memcpy(Y - 4 - 3 * ctx->y_stride, Y - 4, ctx->y_stride);
845 30 memcpy(Y - 4 - 4 * ctx->y_stride, Y - 4, ctx->y_stride);
846
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 7170 } else if (j == h - 1) {
847 30 memcpy(Y - 4 + 1 * ctx->y_stride, Y - 4, ctx->y_stride);
848 30 memcpy(Y - 4 + 2 * ctx->y_stride, Y - 4, ctx->y_stride);
849 30 memcpy(Y - 4 + 3 * ctx->y_stride, Y - 4, ctx->y_stride);
850 30 memcpy(Y - 4 + 4 * ctx->y_stride, Y - 4, ctx->y_stride);
851 }
852
853 7200 Y += ctx->y_stride;
854
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 7200 if (j & 1) {
855 /* horizontal edge extension */
856 3600 U[-2] = U[-1] = U[0];
857 3600 V[-2] = V[-1] = V[0];
858 3600 U[cw + 1] = U[cw] = U[cw - 1];
859 3600 V[cw + 1] = V[cw] = V[cw - 1];
860
861 /* vertical edge extension */
862
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 3600 if (j == 1) {
863 30 memcpy(U - 2 - 1 * ctx->uv_stride, U - 2, ctx->uv_stride);
864 30 memcpy(V - 2 - 1 * ctx->uv_stride, V - 2, ctx->uv_stride);
865 30 memcpy(U - 2 - 2 * ctx->uv_stride, U - 2, ctx->uv_stride);
866 30 memcpy(V - 2 - 2 * ctx->uv_stride, V - 2, ctx->uv_stride);
867
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 3570 } else if (j == h - 1) {
868 30 memcpy(U - 2 + 1 * ctx->uv_stride, U - 2, ctx->uv_stride);
869 30 memcpy(V - 2 + 1 * ctx->uv_stride, V - 2, ctx->uv_stride);
870 30 memcpy(U - 2 + 2 * ctx->uv_stride, U - 2, ctx->uv_stride);
871 30 memcpy(V - 2 + 2 * ctx->uv_stride, V - 2, ctx->uv_stride);
872 }
873
874 3600 U += ctx->uv_stride;
875 3600 V += ctx->uv_stride;
876 }
877 7200 dst += p->linesize[0];
878 }
879
880 30 return keyframe;
881 }
882
883 static const int tm2_stream_order[TM2_NUM_STREAMS] = {
884 TM2_C_HI, TM2_C_LO, TM2_L_HI, TM2_L_LO, TM2_UPD, TM2_MOT, TM2_TYPE
885 };
886
887 #define TM2_HEADER_SIZE 40
888
889 30 static int decode_frame(AVCodecContext *avctx, AVFrame *rframe,
890 int *got_frame, AVPacket *avpkt)
891 {
892 30 TM2Context * const l = avctx->priv_data;
893 30 const uint8_t *buf = avpkt->data;
894 30 int buf_size = avpkt->size & ~3;
895 30 AVFrame * const p = l->pic;
896 30 int offset = TM2_HEADER_SIZE;
897 int i, t, ret;
898
899 30 l->error = 0;
900
901 30 av_fast_padded_malloc(&l->buffer, &l->buffer_size, buf_size);
902
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 30 if (!l->buffer) {
903 ✗ av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n");
904 ✗ return AVERROR(ENOMEM);
905 }
906
907
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 30 if ((ret = ff_reget_buffer(avctx, p, 0)) < 0)
908 ✗ return ret;
909
910 30 l->bdsp.bswap_buf((uint32_t *) l->buffer, (const uint32_t *) buf,
911 buf_size >> 2);
912
913
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 30 if ((ret = tm2_read_header(l, l->buffer)) < 0) {
914 ✗ return ret;
915 }
916
917
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 240 for (i = 0; i < TM2_NUM_STREAMS; i++) {
918
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 210 if (offset >= buf_size) {
919 ✗ av_log(avctx, AV_LOG_ERROR, "no space for tm2_read_stream\n");
920 ✗ return AVERROR_INVALIDDATA;
921 }
922
923 210 t = tm2_read_stream(l, l->buffer + offset, tm2_stream_order[i],
924 buf_size - offset);
925
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 210 if (t < 0) {
926 ✗ int j = tm2_stream_order[i];
927 ✗ if (l->tok_lens[j])
928 ✗ memset(l->tokens[j], 0, sizeof(**l->tokens) * l->tok_lens[j]);
929 ✗ return t;
930 }
931 210 offset += t;
932 }
933
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 30 if (tm2_decode_blocks(l, p)) {
934 5 p->flags |= AV_FRAME_FLAG_KEY;
935 5 p->pict_type = AV_PICTURE_TYPE_I;
936 } else {
937 25 p->flags &= ~AV_FRAME_FLAG_KEY;
938 25 p->pict_type = AV_PICTURE_TYPE_P;
939 }
940
941 30 l->cur = !l->cur;
942 30 *got_frame = 1;
943 30 ret = av_frame_ref(rframe, l->pic);
944
945
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 30 return (ret < 0) ? ret : buf_size;
946 }
947
948 2 static av_cold int decode_init(AVCodecContext *avctx)
949 {
950 2 TM2Context * const l = avctx->priv_data;
951 2 int w = avctx->width, h = avctx->height;
952
953
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 2 if ((avctx->width & 3) || (avctx->height & 3)) {
954 ✗ av_log(avctx, AV_LOG_ERROR, "Width and height must be multiple of 4\n");
955 ✗ return AVERROR(EINVAL);
956 }
957
958 2 l->avctx = avctx;
959 2 avctx->pix_fmt = AV_PIX_FMT_BGR24;
960
961 2 l->pic = av_frame_alloc();
962
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 2 if (!l->pic)
963 ✗ return AVERROR(ENOMEM);
964
965 2 ff_bswapdsp_init(&l->bdsp);
966
967 2 l->last = av_malloc_array(w, 2 * sizeof(*l->last));
968
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 2 if (!l->last)
969 ✗ return AVERROR(ENOMEM);
970 2 l->clast = l->last + w;
971
972 2 w += 8;
973 2 h += 8;
974 2 l->Y_base = av_calloc(w * h, 2 * sizeof(*l->Y_base));
975
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 2 if (!l->Y_base)
976 ✗ return AVERROR(ENOMEM);
977 2 l->y_stride = w;
978 2 l->Y1 = l->Y_base + l->y_stride * 4 + 4;
979 2 l->Y2 = l->Y1 + w * h;
980 2 w = (w + 1) >> 1;
981 2 h = (h + 1) >> 1;
982 2 l->UV_base = av_calloc(w * h, 4 * sizeof(*l->UV_base));
983
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 2 if (!l->UV_base)
984 ✗ return AVERROR(ENOMEM);
985 2 l->uv_stride = w;
986 2 l->U1 = l->UV_base + l->uv_stride * 2 + 2;
987 2 l->U2 = l->U1 + w * h;
988 2 l->V1 = l->U2 + w * h;
989 2 l->V2 = l->V1 + w * h;
990
991 2 return 0;
992 }
993
994 2 static av_cold int decode_end(AVCodecContext *avctx)
995 {
996 2 TM2Context * const l = avctx->priv_data;
997 int i;
998
999 2 av_freep(&l->last);
1000
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 16 for (i = 0; i < TM2_NUM_STREAMS; i++)
1001 14 av_freep(&l->tokens[i]);
1002
1003 2 av_freep(&l->Y_base);
1004 2 av_freep(&l->UV_base);
1005 2 av_freep(&l->buffer);
1006 2 l->buffer_size = 0;
1007
1008 2 av_frame_free(&l->pic);
1009
1010 2 return 0;
1011 }
1012
1013 const FFCodec ff_truemotion2_decoder = {
1014 .p.name = "truemotion2",
1015 CODEC_LONG_NAME("Duck TrueMotion 2.0"),
1016 .p.type = AVMEDIA_TYPE_VIDEO,
1017 .p.id = AV_CODEC_ID_TRUEMOTION2,
1018 .priv_data_size = sizeof(TM2Context),
1019 .init = decode_init,
1020 .close = decode_end,
1021 FF_CODEC_DECODE_CB(decode_frame),
1022 .p.capabilities = AV_CODEC_CAP_DR1,
1023 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1024 };
1025