FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/truemotion2.c
Date: 2021-09-24 20:55:06
Exec Total Coverage
Lines: 463 547 84.6%
Branches: 241 307 78.5%

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 "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 int error;
67 BswapDSPContext bdsp;
68
69 uint8_t *buffer;
70 int buffer_size;
71
72 /* TM2 streams */
73 int *tokens[TM2_NUM_STREAMS];
74 int tok_lens[TM2_NUM_STREAMS];
75 int tok_ptrs[TM2_NUM_STREAMS];
76 int deltas[TM2_NUM_STREAMS][TM2_DELTAS];
77 /* for blocks decoding */
78 int D[4];
79 int CD[4];
80 int *last;
81 int *clast;
82
83 /* data for current and previous frame */
84 int *Y_base, *UV_base;
85 int *Y1, *U1, *V1, *Y2, *U2, *V2;
86 int y_stride, uv_stride;
87 int cur;
88 } TM2Context;
89
90 /**
91 * Huffman codes for each of streams
92 */
93 typedef struct TM2Codes {
94 VLC vlc; ///< table for FFmpeg bitstream reader
95 int bits;
96 int *recode; ///< table for converting from code indexes to values
97 int length;
98 } TM2Codes;
99
100 /**
101 * structure for gathering Huffman codes information
102 */
103 typedef struct TM2Huff {
104 int val_bits; ///< length of literal
105 int max_bits; ///< maximum length of code
106 int min_bits; ///< minimum length of code
107 int nodes; ///< total number of nodes in tree
108 int num; ///< current number filled
109 int max_num; ///< total number of codes
110 int *nums; ///< literals
111 uint8_t *lens; ///< codelengths
112 } TM2Huff;
113
114 /**
115 *
116 * @returns the length of the longest code or an AVERROR code
117 */
118 3148 static int tm2_read_tree(TM2Context *ctx, int length, TM2Huff *huff)
119 {
120 int ret, ret2;
121
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3148 if (length > huff->max_bits) {
122 av_log(ctx->avctx, AV_LOG_ERROR, "Tree exceeded its given depth (%i)\n",
123 huff->max_bits);
124 return AVERROR_INVALIDDATA;
125 }
126
127
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3148 if (!get_bits1(&ctx->gb)) { /* literal */
128
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1670 if (length == 0) {
129 3 length = 1;
130 }
131
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1670 if (huff->num >= huff->max_num) {
132 av_log(ctx->avctx, AV_LOG_DEBUG, "Too many literals\n");
133 return AVERROR_INVALIDDATA;
134 }
135 1670 huff->nums[huff->num] = get_bits_long(&ctx->gb, huff->val_bits);
136 1670 huff->lens[huff->num] = length;
137 1670 huff->num++;
138 1670 return length;
139 } else { /* non-terminal node */
140
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1478 if ((ret2 = tm2_read_tree(ctx, length + 1, huff)) < 0)
141 return ret2;
142
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1478 if ((ret = tm2_read_tree(ctx, length + 1, huff)) < 0)
143 return ret;
144 }
145 1478 return FFMAX(ret, ret2);
146 }
147
148 192 static int tm2_build_huff_table(TM2Context *ctx, TM2Codes *code)
149 {
150 TM2Huff huff;
151 192 int res = 0;
152
153 192 huff.val_bits = get_bits(&ctx->gb, 5);
154 192 huff.max_bits = get_bits(&ctx->gb, 5);
155 192 huff.min_bits = get_bits(&ctx->gb, 5);
156 192 huff.nodes = get_bits(&ctx->gb, 17);
157 192 huff.num = 0;
158
159 /* check for correct codes parameters */
160
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192 if ((huff.val_bits < 1) || (huff.val_bits > 32) ||
161
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192 (huff.max_bits < 0) || (huff.max_bits > 25)) {
162 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect tree parameters - literal "
163 "length: %i, max code length: %i\n", huff.val_bits, huff.max_bits);
164 return AVERROR_INVALIDDATA;
165 }
166
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192 if ((huff.nodes <= 0) || (huff.nodes > 0x10000)) {
167 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of Huffman tree "
168 "nodes: %i\n", huff.nodes);
169 return AVERROR_INVALIDDATA;
170 }
171 /* one-node tree */
172
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192 if (huff.max_bits == 0)
173 3 huff.max_bits = 1;
174
175 /* allocate space for codes - it is exactly ceil(nodes / 2) entries */
176 192 huff.max_num = (huff.nodes + 1) >> 1;
177 192 huff.nums = av_calloc(huff.max_num, sizeof(int));
178 192 huff.lens = av_mallocz(huff.max_num);
179
180
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192 if (!huff.nums || !huff.lens) {
181 res = AVERROR(ENOMEM);
182 goto out;
183 }
184
185 192 res = tm2_read_tree(ctx, 0, &huff);
186
187
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192 if (res >= 0 && res != huff.max_bits) {
188 av_log(ctx->avctx, AV_LOG_ERROR, "Got less bits than expected: %i of %i\n",
189 res, huff.max_bits);
190 res = AVERROR_INVALIDDATA;
191 }
192
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192 if (huff.num != huff.max_num) {
193 av_log(ctx->avctx, AV_LOG_ERROR, "Got less codes than expected: %i of %i\n",
194 huff.num, huff.max_num);
195 res = AVERROR_INVALIDDATA;
196 }
197
198 /* convert codes to vlc_table */
199
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192 if (res >= 0) {
200 192 res = ff_init_vlc_from_lengths(&code->vlc, huff.max_bits, huff.max_num,
201 192 huff.lens, sizeof(huff.lens[0]),
202 192 NULL, 0, 0, 0, 0, ctx->avctx);
203
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192 if (res < 0)
204 av_log(ctx->avctx, AV_LOG_ERROR, "Cannot build VLC table\n");
205 else {
206 192 code->bits = huff.max_bits;
207 192 code->length = huff.max_num;
208 192 code->recode = huff.nums;
209 192 huff.nums = NULL;
210 }
211 }
212
213 out:
214 /* free allocated memory */
215 192 av_free(huff.nums);
216 192 av_free(huff.lens);
217
218 192 return res;
219 }
220
221 192 static void tm2_free_codes(TM2Codes *code)
222 {
223 192 av_free(code->recode);
224
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192 if (code->vlc.table)
225 192 ff_free_vlc(&code->vlc);
226 192 }
227
228 2353240 static inline int tm2_get_token(GetBitContext *gb, TM2Codes *code)
229 {
230 int val;
231 2353240 val = get_vlc2(gb, code->vlc.table, code->bits, 1);
232
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2353240 if(val<0)
233 return -1;
234 2353240 return code->recode[val];
235 }
236
237 #define TM2_OLD_HEADER_MAGIC 0x00000100
238 #define TM2_NEW_HEADER_MAGIC 0x00000101
239
240 30 static inline int tm2_read_header(TM2Context *ctx, const uint8_t *buf)
241 {
242 30 uint32_t magic = AV_RL32(buf);
243
244
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30 switch (magic) {
245 case TM2_OLD_HEADER_MAGIC:
246 avpriv_request_sample(ctx->avctx, "Old TM2 header");
247 return 0;
248 30 case TM2_NEW_HEADER_MAGIC:
249 30 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 29 static int tm2_read_deltas(TM2Context *ctx, int stream_id)
258 {
259 int d, mb;
260 int i, v;
261
262 29 d = get_bits(&ctx->gb, 9);
263 29 mb = get_bits(&ctx->gb, 5);
264
265 av_assert2(mb < 32);
266
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29 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
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594 for (i = 0; i < d; i++) {
272 565 v = get_bits_long(&ctx->gb, mb);
273
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565 if (v & (1 << (mb - 1)))
274 270 ctx->deltas[stream_id][i] = v - (1U << mb);
275 else
276 295 ctx->deltas[stream_id][i] = v;
277 }
278
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1320 for (; i < TM2_DELTAS; i++)
279 1291 ctx->deltas[stream_id][i] = 0;
280
281 29 return 0;
282 }
283
284 210 static int tm2_read_stream(TM2Context *ctx, const uint8_t *buf, int stream_id, int buf_size)
285 {
286 int i, ret;
287 210 int skip = 0;
288 int len, toks, pos;
289 TM2Codes codes;
290 GetByteContext gb;
291
292
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210 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 */
298 210 bytestream2_init(&gb, buf, buf_size);
299 210 len = bytestream2_get_be32(&gb);
300
301
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210 if (len == 0)
302 18 return 4;
303
304
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192 if (len >= INT_MAX / 4 - 1 || len < 0 || len * 4 + 4 > buf_size) {
305 av_log(ctx->avctx, AV_LOG_ERROR, "Error, invalid stream size.\n");
306 return AVERROR_INVALIDDATA;
307 }
308 192 skip = len * 4 + 4;
309
310 192 toks = bytestream2_get_be32(&gb);
311
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192 if (toks & 1) {
312 162 len = bytestream2_get_be32(&gb);
313
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162 if (len == TM2_ESCAPE) {
314 5 len = bytestream2_get_be32(&gb);
315 }
316
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162 if (len > 0) {
317 29 pos = bytestream2_tell(&gb);
318
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29 if (skip <= pos)
319 return AVERROR_INVALIDDATA;
320 29 init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
321
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29 if ((ret = tm2_read_deltas(ctx, stream_id)) < 0)
322 return ret;
323 29 bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2);
324 }
325 }
326 /* skip unused fields */
327 192 len = bytestream2_get_be32(&gb);
328
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192 if (len == TM2_ESCAPE) { /* some unknown length - could be escaped too */
329 bytestream2_skip(&gb, 8); /* unused by decoder */
330 } else {
331 192 bytestream2_skip(&gb, 4); /* unused by decoder */
332 }
333
334 192 pos = bytestream2_tell(&gb);
335
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192 if (skip <= pos)
336 return AVERROR_INVALIDDATA;
337 192 init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
338
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192 if ((ret = tm2_build_huff_table(ctx, &codes)) < 0)
339 return ret;
340 192 bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2);
341
342 192 toks >>= 1;
343 /* check if we have sane number of tokens */
344
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192 if ((toks < 0) || (toks > 0xFFFFFF)) {
345 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
346 ret = AVERROR_INVALIDDATA;
347 goto end;
348 }
349 192 ret = av_reallocp_array(&ctx->tokens[stream_id], toks, sizeof(int));
350
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192 if (ret < 0) {
351 ctx->tok_lens[stream_id] = 0;
352 goto end;
353 }
354 192 ctx->tok_lens[stream_id] = toks;
355 192 len = bytestream2_get_be32(&gb);
356
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192 if (len > 0) {
357 189 pos = bytestream2_tell(&gb);
358
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189 if (skip <= pos) {
359 ret = AVERROR_INVALIDDATA;
360 goto end;
361 }
362 189 init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
363
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2353429 for (i = 0; i < toks; i++) {
364
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2353240 if (get_bits_left(&ctx->gb) <= 0) {
365 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
366 ret = AVERROR_INVALIDDATA;
367 goto end;
368 }
369 2353240 ctx->tokens[stream_id][i] = tm2_get_token(&ctx->gb, &codes);
370
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2353240 if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS || ctx->tokens[stream_id][i]<0) {
371 av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n",
372 ctx->tokens[stream_id][i], stream_id, i);
373 ret = AVERROR_INVALIDDATA;
374 goto end;
375 }
376 }
377 } else {
378
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3 if (len < 0) {
379 ret = AVERROR_INVALIDDATA;
380 goto end;
381 }
382
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21 for (i = 0; i < toks; i++) {
383 18 ctx->tokens[stream_id][i] = codes.recode[0];
384
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18 if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS) {
385 av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n",
386 ctx->tokens[stream_id][i], stream_id, i);
387 ret = AVERROR_INVALIDDATA;
388 goto end;
389 }
390 }
391 }
392
393 192 ret = skip;
394
395 192 end:
396 192 tm2_free_codes(&codes);
397 192 return ret;
398 }
399
400 2353258 static inline int GET_TOK(TM2Context *ctx,int type)
401 {
402
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2353258 if (ctx->tok_ptrs[type] >= ctx->tok_lens[type]) {
403 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]);
404 ctx->error = 1;
405 return 0;
406 }
407
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2353258 if (type <= TM2_MOT) {
408
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2209258 if (ctx->tokens[type][ctx->tok_ptrs[type]] >= TM2_DELTAS) {
409 av_log(ctx->avctx, AV_LOG_ERROR, "token %d is too large\n", ctx->tokens[type][ctx->tok_ptrs[type]]);
410 return 0;
411 }
412 2209258 return ctx->deltas[type][ctx->tokens[type][ctx->tok_ptrs[type]++]];
413 }
414 144000 return ctx->tokens[type][ctx->tok_ptrs[type]++];
415 }
416
417 /* blocks decoding routines */
418
419 /* common Y, U, V pointers initialisation */
420 #define TM2_INIT_POINTERS() \
421 int *last, *clast; \
422 int *Y, *U, *V;\
423 int Ystride, Ustride, Vstride;\
424 \
425 Ystride = ctx->y_stride;\
426 Vstride = ctx->uv_stride;\
427 Ustride = ctx->uv_stride;\
428 Y = (ctx->cur?ctx->Y2:ctx->Y1) + by * 4 * Ystride + bx * 4;\
429 V = (ctx->cur?ctx->V2:ctx->V1) + by * 2 * Vstride + bx * 2;\
430 U = (ctx->cur?ctx->U2:ctx->U1) + by * 2 * Ustride + bx * 2;\
431 last = ctx->last + bx * 4;\
432 clast = ctx->clast + bx * 4;
433
434 #define TM2_INIT_POINTERS_2() \
435 unsigned *Yo, *Uo, *Vo;\
436 int oYstride, oUstride, oVstride;\
437 \
438 TM2_INIT_POINTERS();\
439 oYstride = Ystride;\
440 oVstride = Vstride;\
441 oUstride = Ustride;\
442 Yo = (ctx->cur?ctx->Y1:ctx->Y2) + by * 4 * oYstride + bx * 4;\
443 Vo = (ctx->cur?ctx->V1:ctx->V2) + by * 2 * oVstride + bx * 2;\
444 Uo = (ctx->cur?ctx->U1:ctx->U2) + by * 2 * oUstride + bx * 2;
445
446 /* recalculate last and delta values for next blocks */
447 #define TM2_RECALC_BLOCK(CHR, stride, last, CD) {\
448 CD[0] = (unsigned)CHR[ 1] - (unsigned)last[1];\
449 CD[1] = (unsigned)CHR[stride + 1] - (unsigned) CHR[1];\
450 last[0] = (int)CHR[stride + 0];\
451 last[1] = (int)CHR[stride + 1];}
452
453 /* common operations - add deltas to 4x4 block of luma or 2x2 blocks of chroma */
454 116660 static inline void tm2_apply_deltas(TM2Context *ctx, int* Y, int stride, int *deltas, int *last)
455 {
456 unsigned ct, d;
457 int i, j;
458
459
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583300 for (j = 0; j < 4; j++){
460 466640 ct = ctx->D[j];
461
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2333200 for (i = 0; i < 4; i++){
462 1866560 d = deltas[i + j * 4];
463 1866560 ct += d;
464 1866560 last[i] += ct;
465 1866560 Y[i] = av_clip_uint8(last[i]);
466 }
467 466640 Y += stride;
468 466640 ctx->D[j] = ct;
469 }
470 116660 }
471
472 233320 static inline void tm2_high_chroma(int *data, int stride, int *last, unsigned *CD, int *deltas)
473 {
474 int i, j;
475
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699960 for (j = 0; j < 2; j++) {
476
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1399920 for (i = 0; i < 2; i++) {
477 933280 CD[j] += deltas[i + j * 2];
478 933280 last[i] += CD[j];
479 933280 data[i] = last[i];
480 }
481 466640 data += stride;
482 }
483 233320 }
484
485 99888 static inline void tm2_low_chroma(int *data, int stride, int *clast, unsigned *CD, int *deltas, int bx)
486 {
487 int t;
488 int l;
489 int prev;
490
491
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99888 if (bx > 0)
492 99060 prev = clast[-3];
493 else
494 828 prev = 0;
495 99888 t = (int)(CD[0] + CD[1]) >> 1;
496 99888 l = (int)(prev - CD[0] - CD[1] + clast[1]) >> 1;
497 99888 CD[1] = CD[0] + CD[1] - t;
498 99888 CD[0] = t;
499 99888 clast[0] = l;
500
501 99888 tm2_high_chroma(data, stride, clast, CD, deltas);
502 99888 }
503
504 66716 static inline void tm2_hi_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
505 {
506 int i;
507 int deltas[16];
508
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66716 TM2_INIT_POINTERS();
509
510 /* hi-res chroma */
511
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333580 for (i = 0; i < 4; i++) {
512 266864 deltas[i] = GET_TOK(ctx, TM2_C_HI);
513 266864 deltas[i + 4] = GET_TOK(ctx, TM2_C_HI);
514 }
515 66716 tm2_high_chroma(U, Ustride, clast, ctx->CD, deltas);
516 66716 tm2_high_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas + 4);
517
518 /* hi-res luma */
519
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1134172 for (i = 0; i < 16; i++)
520 1067456 deltas[i] = GET_TOK(ctx, TM2_L_HI);
521
522 66716 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
523 66716 }
524
525 22463 static inline void tm2_med_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
526 {
527 int i;
528 int deltas[16];
529
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22463 TM2_INIT_POINTERS();
530
531 /* low-res chroma */
532 22463 deltas[0] = GET_TOK(ctx, TM2_C_LO);
533 22463 deltas[1] = deltas[2] = deltas[3] = 0;
534 22463 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
535
536 22463 deltas[0] = GET_TOK(ctx, TM2_C_LO);
537 22463 deltas[1] = deltas[2] = deltas[3] = 0;
538 22463 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
539
540 /* hi-res luma */
541
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381871 for (i = 0; i < 16; i++)
542 359408 deltas[i] = GET_TOK(ctx, TM2_L_HI);
543
544 22463 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
545 22463 }
546
547 12092 static inline void tm2_low_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
548 {
549 int i;
550 int t1, t2;
551 int deltas[16];
552
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12092 TM2_INIT_POINTERS();
553
554 /* low-res chroma */
555 12092 deltas[0] = GET_TOK(ctx, TM2_C_LO);
556 12092 deltas[1] = deltas[2] = deltas[3] = 0;
557 12092 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
558
559 12092 deltas[0] = GET_TOK(ctx, TM2_C_LO);
560 12092 deltas[1] = deltas[2] = deltas[3] = 0;
561 12092 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
562
563 /* low-res luma */
564
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205564 for (i = 0; i < 16; i++)
565 193472 deltas[i] = 0;
566
567 12092 deltas[ 0] = GET_TOK(ctx, TM2_L_LO);
568 12092 deltas[ 2] = GET_TOK(ctx, TM2_L_LO);
569 12092 deltas[ 8] = GET_TOK(ctx, TM2_L_LO);
570 12092 deltas[10] = GET_TOK(ctx, TM2_L_LO);
571
572
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12092 if (bx > 0)
573 12025 last[0] = (int)((unsigned)last[-1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3] + last[1]) >> 1;
574 else
575 67 last[0] = (int)((unsigned)last[1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3])>> 1;
576 12092 last[2] = (int)((unsigned)last[1] + last[3]) >> 1;
577
578 12092 t1 = ctx->D[0] + (unsigned)ctx->D[1];
579 12092 ctx->D[0] = t1 >> 1;
580 12092 ctx->D[1] = t1 - (t1 >> 1);
581 12092 t2 = ctx->D[2] + (unsigned)ctx->D[3];
582 12092 ctx->D[2] = t2 >> 1;
583 12092 ctx->D[3] = t2 - (t2 >> 1);
584
585 12092 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
586 12092 }
587
588 15389 static inline void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
589 {
590 int i;
591 int ct;
592 unsigned left, right;
593 int diff;
594 int deltas[16];
595
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15389 TM2_INIT_POINTERS();
596
597 /* null chroma */
598 15389 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
599 15389 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
600
601 15389 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
602 15389 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
603
604 /* null luma */
605
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261613 for (i = 0; i < 16; i++)
606 246224 deltas[i] = 0;
607
608 15389 ct = (unsigned)ctx->D[0] + ctx->D[1] + ctx->D[2] + ctx->D[3];
609
610
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15389 if (bx > 0)
611 15315 left = last[-1] - (unsigned)ct;
612 else
613 74 left = 0;
614
615 15389 right = last[3];
616 15389 diff = right - left;
617 15389 last[0] = left + (diff >> 2);
618 15389 last[1] = left + (diff >> 1);
619 15389 last[2] = right - (diff >> 2);
620 15389 last[3] = right;
621 {
622 15389 unsigned tp = left;
623
624 15389 ctx->D[0] = (tp + (ct >> 2)) - left;
625 15389 left += ctx->D[0];
626 15389 ctx->D[1] = (tp + (ct >> 1)) - left;
627 15389 left += ctx->D[1];
628 15389 ctx->D[2] = ((tp + ct) - (ct >> 2)) - left;
629 15389 left += ctx->D[2];
630 15389 ctx->D[3] = (tp + ct) - left;
631 }
632 15389 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
633 15389 }
634
635 20959 static inline void tm2_still_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
636 {
637 int i, j;
638
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20959 TM2_INIT_POINTERS_2();
639
640 /* update chroma */
641
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62877 for (j = 0; j < 2; j++) {
642
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125754 for (i = 0; i < 2; i++){
643 83836 U[i] = Uo[i];
644 83836 V[i] = Vo[i];
645 }
646 41918 U += Ustride; V += Vstride;
647 41918 Uo += oUstride; Vo += oVstride;
648 }
649 20959 U -= Ustride * 2;
650 20959 V -= Vstride * 2;
651 20959 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
652 20959 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
653
654 /* update deltas */
655 20959 ctx->D[0] = Yo[3] - last[3];
656 20959 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
657 20959 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
658 20959 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
659
660
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104795 for (j = 0; j < 4; j++) {
661
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419180 for (i = 0; i < 4; i++) {
662 335344 Y[i] = Yo[i];
663 335344 last[i] = Yo[i];
664 }
665 83836 Y += Ystride;
666 83836 Yo += oYstride;
667 }
668 20959 }
669
670 5383 static inline void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
671 {
672 int i, j;
673 unsigned d;
674
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5383 TM2_INIT_POINTERS_2();
675
676 /* update chroma */
677
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16149 for (j = 0; j < 2; j++) {
678
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32298 for (i = 0; i < 2; i++) {
679 21532 U[i] = Uo[i] + GET_TOK(ctx, TM2_UPD);
680 21532 V[i] = Vo[i] + GET_TOK(ctx, TM2_UPD);
681 }
682 10766 U += Ustride;
683 10766 V += Vstride;
684 10766 Uo += oUstride;
685 10766 Vo += oVstride;
686 }
687 5383 U -= Ustride * 2;
688 5383 V -= Vstride * 2;
689 5383 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
690 5383 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
691
692 /* update deltas */
693 5383 ctx->D[0] = Yo[3] - last[3];
694 5383 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
695 5383 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
696 5383 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
697
698
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26915 for (j = 0; j < 4; j++) {
699 21532 d = last[3];
700
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107660 for (i = 0; i < 4; i++) {
701 86128 Y[i] = Yo[i] + (unsigned)GET_TOK(ctx, TM2_UPD);
702 86128 last[i] = Y[i];
703 }
704 21532 ctx->D[j] = last[3] - d;
705 21532 Y += Ystride;
706 21532 Yo += oYstride;
707 }
708 5383 }
709
710 998 static inline void tm2_motion_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
711 {
712 int i, j;
713 int mx, my;
714
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998 TM2_INIT_POINTERS_2();
715
716 998 mx = GET_TOK(ctx, TM2_MOT);
717 998 my = GET_TOK(ctx, TM2_MOT);
718 998 mx = av_clip(mx, -(bx * 4 + 4), ctx->avctx->width - bx * 4);
719 998 my = av_clip(my, -(by * 4 + 4), ctx->avctx->height - by * 4);
720
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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) {
722 av_log(ctx->avctx, AV_LOG_ERROR, "MV out of picture\n");
723 return;
724 }
725
726 998 Yo += my * oYstride + mx;
727 998 Uo += (my >> 1) * oUstride + (mx >> 1);
728 998 Vo += (my >> 1) * oVstride + (mx >> 1);
729
730 /* copy chroma */
731
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2994 for (j = 0; j < 2; j++) {
732
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5988 for (i = 0; i < 2; i++) {
733 3992 U[i] = Uo[i];
734 3992 V[i] = Vo[i];
735 }
736 1996 U += Ustride;
737 1996 V += Vstride;
738 1996 Uo += oUstride;
739 1996 Vo += oVstride;
740 }
741 998 U -= Ustride * 2;
742 998 V -= Vstride * 2;
743 998 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
744 998 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
745
746 /* copy luma */
747
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4990 for (j = 0; j < 4; j++) {
748
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19960 for (i = 0; i < 4; i++) {
749 15968 Y[i] = Yo[i];
750 }
751 3992 Y += Ystride;
752 3992 Yo += oYstride;
753 }
754 /* calculate deltas */
755 998 Y -= Ystride * 4;
756 998 ctx->D[0] = (unsigned)Y[3] - last[3];
757 998 ctx->D[1] = (unsigned)Y[3 + Ystride] - Y[3];
758 998 ctx->D[2] = (unsigned)Y[3 + Ystride * 2] - Y[3 + Ystride];
759 998 ctx->D[3] = (unsigned)Y[3 + Ystride * 3] - Y[3 + Ystride * 2];
760
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4990 for (i = 0; i < 4; i++)
761 3992 last[i] = Y[i + Ystride * 3];
762 }
763
764 30 static int tm2_decode_blocks(TM2Context *ctx, AVFrame *p)
765 {
766 int i, j;
767 30 int w = ctx->avctx->width, h = ctx->avctx->height, bw = w >> 2, bh = h >> 2, cw = w >> 1;
768 int type;
769 30 int keyframe = 1;
770 int *Y, *U, *V;
771 uint8_t *dst;
772
773
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240 for (i = 0; i < TM2_NUM_STREAMS; i++)
774 210 ctx->tok_ptrs[i] = 0;
775
776
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30 if (ctx->tok_lens[TM2_TYPE]<bw*bh) {
777 av_log(ctx->avctx,AV_LOG_ERROR,"Got %i tokens for %i blocks\n",ctx->tok_lens[TM2_TYPE],bw*bh);
778 return AVERROR_INVALIDDATA;
779 }
780
781 30 memset(ctx->last, 0, 4 * bw * sizeof(int));
782 30 memset(ctx->clast, 0, 4 * bw * sizeof(int));
783
784
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1830 for (j = 0; j < bh; j++) {
785 1800 memset(ctx->D, 0, 4 * sizeof(int));
786 1800 memset(ctx->CD, 0, 4 * sizeof(int));
787
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145800 for (i = 0; i < bw; i++) {
788 144000 type = GET_TOK(ctx, TM2_TYPE);
789
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144000 switch(type) {
790 66716 case TM2_HI_RES:
791 66716 tm2_hi_res_block(ctx, p, i, j);
792 66716 break;
793 22463 case TM2_MED_RES:
794 22463 tm2_med_res_block(ctx, p, i, j);
795 22463 break;
796 12092 case TM2_LOW_RES:
797 12092 tm2_low_res_block(ctx, p, i, j);
798 12092 break;
799 15389 case TM2_NULL_RES:
800 15389 tm2_null_res_block(ctx, p, i, j);
801 15389 break;
802 5383 case TM2_UPDATE:
803 5383 tm2_update_block(ctx, p, i, j);
804 5383 keyframe = 0;
805 5383 break;
806 20959 case TM2_STILL:
807 20959 tm2_still_block(ctx, p, i, j);
808 20959 keyframe = 0;
809 20959 break;
810 998 case TM2_MOTION:
811 998 tm2_motion_block(ctx, p, i, j);
812 998 keyframe = 0;
813 998 break;
814 default:
815 av_log(ctx->avctx, AV_LOG_ERROR, "Skipping unknown block type %i\n", type);
816 }
817
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144000 if (ctx->error)
818 return AVERROR_INVALIDDATA;
819 }
820 }
821
822 /* copy data from our buffer to AVFrame */
823
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30 Y = (ctx->cur?ctx->Y2:ctx->Y1);
824
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30 U = (ctx->cur?ctx->U2:ctx->U1);
825
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30 V = (ctx->cur?ctx->V2:ctx->V1);
826 30 dst = p->data[0];
827
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7230 for (j = 0; j < h; j++) {
828
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2311200 for (i = 0; i < w; i++) {
829 2304000 unsigned y = Y[i], u = U[i >> 1], v = V[i >> 1];
830 2304000 dst[3*i+0] = av_clip_uint8(y + v);
831 2304000 dst[3*i+1] = av_clip_uint8(y);
832 2304000 dst[3*i+2] = av_clip_uint8(y + u);
833 }
834
835 /* horizontal edge extension */
836 7200 Y[-4] = Y[-3] = Y[-2] = Y[-1] = Y[0];
837 7200 Y[w + 3] = Y[w + 2] = Y[w + 1] = Y[w] = Y[w - 1];
838
839 /* vertical edge extension */
840
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7200 if (j == 0) {
841 30 memcpy(Y - 4 - 1 * ctx->y_stride, Y - 4, ctx->y_stride);
842 30 memcpy(Y - 4 - 2 * ctx->y_stride, Y - 4, ctx->y_stride);
843 30 memcpy(Y - 4 - 3 * ctx->y_stride, Y - 4, ctx->y_stride);
844 30 memcpy(Y - 4 - 4 * ctx->y_stride, Y - 4, ctx->y_stride);
845
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7170 } else if (j == h - 1) {
846 30 memcpy(Y - 4 + 1 * ctx->y_stride, Y - 4, ctx->y_stride);
847 30 memcpy(Y - 4 + 2 * ctx->y_stride, Y - 4, ctx->y_stride);
848 30 memcpy(Y - 4 + 3 * ctx->y_stride, Y - 4, ctx->y_stride);
849 30 memcpy(Y - 4 + 4 * ctx->y_stride, Y - 4, ctx->y_stride);
850 }
851
852 7200 Y += ctx->y_stride;
853
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7200 if (j & 1) {
854 /* horizontal edge extension */
855 3600 U[-2] = U[-1] = U[0];
856 3600 V[-2] = V[-1] = V[0];
857 3600 U[cw + 1] = U[cw] = U[cw - 1];
858 3600 V[cw + 1] = V[cw] = V[cw - 1];
859
860 /* vertical edge extension */
861
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3600 if (j == 1) {
862 30 memcpy(U - 2 - 1 * ctx->uv_stride, U - 2, ctx->uv_stride);
863 30 memcpy(V - 2 - 1 * ctx->uv_stride, V - 2, ctx->uv_stride);
864 30 memcpy(U - 2 - 2 * ctx->uv_stride, U - 2, ctx->uv_stride);
865 30 memcpy(V - 2 - 2 * ctx->uv_stride, V - 2, ctx->uv_stride);
866
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3570 } else if (j == h - 1) {
867 30 memcpy(U - 2 + 1 * ctx->uv_stride, U - 2, ctx->uv_stride);
868 30 memcpy(V - 2 + 1 * ctx->uv_stride, V - 2, ctx->uv_stride);
869 30 memcpy(U - 2 + 2 * ctx->uv_stride, U - 2, ctx->uv_stride);
870 30 memcpy(V - 2 + 2 * ctx->uv_stride, V - 2, ctx->uv_stride);
871 }
872
873 3600 U += ctx->uv_stride;
874 3600 V += ctx->uv_stride;
875 }
876 7200 dst += p->linesize[0];
877 }
878
879 30 return keyframe;
880 }
881
882 static const int tm2_stream_order[TM2_NUM_STREAMS] = {
883 TM2_C_HI, TM2_C_LO, TM2_L_HI, TM2_L_LO, TM2_UPD, TM2_MOT, TM2_TYPE
884 };
885
886 #define TM2_HEADER_SIZE 40
887
888 30 static int decode_frame(AVCodecContext *avctx,
889 void *data, int *got_frame,
890 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 30 p->key_frame = tm2_decode_blocks(l, p);
934
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30 if (p->key_frame)
935 5 p->pict_type = AV_PICTURE_TYPE_I;
936 else
937 25 p->pict_type = AV_PICTURE_TYPE_P;
938
939 30 l->cur = !l->cur;
940 30 *got_frame = 1;
941 30 ret = av_frame_ref(data, l->pic);
942
943
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30 return (ret < 0) ? ret : buf_size;
944 }
945
946 2 static av_cold int decode_init(AVCodecContext *avctx)
947 {
948 2 TM2Context * const l = avctx->priv_data;
949 2 int w = avctx->width, h = avctx->height;
950
951
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2 if ((avctx->width & 3) || (avctx->height & 3)) {
952 av_log(avctx, AV_LOG_ERROR, "Width and height must be multiple of 4\n");
953 return AVERROR(EINVAL);
954 }
955
956 2 l->avctx = avctx;
957 2 avctx->pix_fmt = AV_PIX_FMT_BGR24;
958
959 2 l->pic = av_frame_alloc();
960
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2 if (!l->pic)
961 return AVERROR(ENOMEM);
962
963 2 ff_bswapdsp_init(&l->bdsp);
964
965 2 l->last = av_malloc_array(w, 2 * sizeof(*l->last));
966
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2 if (!l->last)
967 return AVERROR(ENOMEM);
968 2 l->clast = l->last + w;
969
970 2 w += 8;
971 2 h += 8;
972 2 l->Y_base = av_calloc(w * h, 2 * sizeof(*l->Y_base));
973
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2 if (!l->Y_base)
974 return AVERROR(ENOMEM);
975 2 l->y_stride = w;
976 2 l->Y1 = l->Y_base + l->y_stride * 4 + 4;
977 2 l->Y2 = l->Y1 + w * h;
978 2 w = (w + 1) >> 1;
979 2 h = (h + 1) >> 1;
980 2 l->UV_base = av_calloc(w * h, 4 * sizeof(*l->UV_base));
981
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2 if (!l->UV_base)
982 return AVERROR(ENOMEM);
983 2 l->uv_stride = w;
984 2 l->U1 = l->UV_base + l->uv_stride * 2 + 2;
985 2 l->U2 = l->U1 + w * h;
986 2 l->V1 = l->U2 + w * h;
987 2 l->V2 = l->V1 + w * h;
988
989 2 return 0;
990 }
991
992 2 static av_cold int decode_end(AVCodecContext *avctx)
993 {
994 2 TM2Context * const l = avctx->priv_data;
995 int i;
996
997 2 av_freep(&l->last);
998
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16 for (i = 0; i < TM2_NUM_STREAMS; i++)
999 14 av_freep(&l->tokens[i]);
1000
1001 2 av_freep(&l->Y_base);
1002 2 av_freep(&l->UV_base);
1003 2 av_freep(&l->buffer);
1004 2 l->buffer_size = 0;
1005
1006 2 av_frame_free(&l->pic);
1007
1008 2 return 0;
1009 }
1010
1011 const AVCodec ff_truemotion2_decoder = {
1012 .name = "truemotion2",
1013 .long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 2.0"),
1014 .type = AVMEDIA_TYPE_VIDEO,
1015 .id = AV_CODEC_ID_TRUEMOTION2,
1016 .priv_data_size = sizeof(TM2Context),
1017 .init = decode_init,
1018 .close = decode_end,
1019 .decode = decode_frame,
1020 .capabilities = AV_CODEC_CAP_DR1,
1021 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP | FF_CODEC_CAP_INIT_THREADSAFE,
1022 };
1023