Return on negative soff sizes, fixes issue 2515.
[libav.git] / libavcodec / truemotion2.c
CommitLineData
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1/*
2 * Duck/ON2 TrueMotion 2 Decoder
3 * Copyright (c) 2005 Konstantin Shishkov
4 *
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5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
64af6168 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
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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
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
64af6168 20 */
115329f1 21
64af6168 22/**
ba87f080 23 * @file
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24 * Duck TrueMotion2 decoder.
25 */
115329f1 26
64af6168 27#include "avcodec.h"
9106a698 28#include "get_bits.h"
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29#include "dsputil.h"
30
31#define TM2_ESCAPE 0x80000000
adeba281 32#define TM2_DELTAS 64
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33/* Huffman-coded streams of different types of blocks */
34enum TM2_STREAMS{ TM2_C_HI = 0, TM2_C_LO, TM2_L_HI, TM2_L_LO,
35 TM2_UPD, TM2_MOT, TM2_TYPE, TM2_NUM_STREAMS};
36/* Block types */
37enum TM2_BLOCKS{ TM2_HI_RES = 0, TM2_MED_RES, TM2_LOW_RES, TM2_NULL_RES,
38 TM2_UPDATE, TM2_STILL, TM2_MOTION};
39
40typedef struct TM2Context{
41 AVCodecContext *avctx;
42 AVFrame pic;
43
44 GetBitContext gb;
45 DSPContext dsp;
115329f1 46
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47 /* TM2 streams */
48 int *tokens[TM2_NUM_STREAMS];
49 int tok_lens[TM2_NUM_STREAMS];
50 int tok_ptrs[TM2_NUM_STREAMS];
51 int deltas[TM2_NUM_STREAMS][TM2_DELTAS];
52 /* for blocks decoding */
53 int D[4];
54 int CD[4];
55 int *last;
56 int *clast;
115329f1 57
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58 /* data for current and previous frame */
59 int *Y1, *U1, *V1, *Y2, *U2, *V2;
60 int cur;
61} TM2Context;
62
63/**
64* Huffman codes for each of streams
65*/
66typedef struct TM2Codes{
67 VLC vlc; ///< table for FFmpeg bitstream reader
68 int bits;
69 int *recode; ///< table for converting from code indexes to values
70 int length;
71} TM2Codes;
72
73/**
74* structure for gathering Huffman codes information
75*/
76typedef struct TM2Huff{
77 int val_bits; ///< length of literal
78 int max_bits; ///< maximum length of code
79 int min_bits; ///< minimum length of code
80 int nodes; ///< total number of nodes in tree
81 int num; ///< current number filled
82 int max_num; ///< total number of codes
83 int *nums; ///< literals
84 uint32_t *bits; ///< codes
85 int *lens; ///< codelengths
86} TM2Huff;
87
88static int tm2_read_tree(TM2Context *ctx, uint32_t prefix, int length, TM2Huff *huff)
89{
90 if(length > huff->max_bits) {
91 av_log(ctx->avctx, AV_LOG_ERROR, "Tree exceeded its given depth (%i)\n", huff->max_bits);
92 return -1;
93 }
94
95 if(!get_bits1(&ctx->gb)) { /* literal */
96 if (length == 0) {
97 length = 1;
98 }
99 if(huff->num >= huff->max_num) {
100 av_log(ctx->avctx, AV_LOG_DEBUG, "Too many literals\n");
101 return -1;
102 }
103 huff->nums[huff->num] = get_bits_long(&ctx->gb, huff->val_bits);
104 huff->bits[huff->num] = prefix;
105 huff->lens[huff->num] = length;
106 huff->num++;
107 return 0;
108 } else { /* non-terminal node */
109 if(tm2_read_tree(ctx, prefix << 1, length + 1, huff) == -1)
110 return -1;
111 if(tm2_read_tree(ctx, (prefix << 1) | 1, length + 1, huff) == -1)
112 return -1;
113 }
114 return 0;
115}
116
117static int tm2_build_huff_table(TM2Context *ctx, TM2Codes *code)
118{
119 TM2Huff huff;
120 int res = 0;
115329f1 121
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122 huff.val_bits = get_bits(&ctx->gb, 5);
123 huff.max_bits = get_bits(&ctx->gb, 5);
124 huff.min_bits = get_bits(&ctx->gb, 5);
125 huff.nodes = get_bits_long(&ctx->gb, 17);
126 huff.num = 0;
115329f1 127
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128 /* check for correct codes parameters */
129 if((huff.val_bits < 1) || (huff.val_bits > 32) ||
130 (huff.max_bits < 0) || (huff.max_bits > 32)) {
131 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect tree parameters - literal length: %i, max code length: %i\n",
132 huff.val_bits, huff.max_bits);
133 return -1;
134 }
135 if((huff.nodes < 0) || (huff.nodes > 0x10000)) {
136 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of Huffman tree nodes: %i\n", huff.nodes);
137 return -1;
138 }
139 /* one-node tree */
140 if(huff.max_bits == 0)
141 huff.max_bits = 1;
115329f1 142
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143 /* allocate space for codes - it is exactly ceil(nodes / 2) entries */
144 huff.max_num = (huff.nodes + 1) >> 1;
145 huff.nums = av_mallocz(huff.max_num * sizeof(int));
146 huff.bits = av_mallocz(huff.max_num * sizeof(uint32_t));
147 huff.lens = av_mallocz(huff.max_num * sizeof(int));
115329f1 148
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149 if(tm2_read_tree(ctx, 0, 0, &huff) == -1)
150 res = -1;
115329f1 151
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152 if(huff.num != huff.max_num) {
153 av_log(ctx->avctx, AV_LOG_ERROR, "Got less codes than expected: %i of %i\n",
154 huff.num, huff.max_num);
155 res = -1;
156 }
115329f1 157
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158 /* convert codes to vlc_table */
159 if(res != -1) {
160 int i;
115329f1 161
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162 res = init_vlc(&code->vlc, huff.max_bits, huff.max_num,
163 huff.lens, sizeof(int), sizeof(int),
164 huff.bits, sizeof(uint32_t), sizeof(uint32_t), 0);
165 if(res < 0) {
166 av_log(ctx->avctx, AV_LOG_ERROR, "Cannot build VLC table\n");
167 res = -1;
115329f1 168 } else
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169 res = 0;
170 if(res != -1) {
171 code->bits = huff.max_bits;
172 code->length = huff.max_num;
173 code->recode = av_malloc(code->length * sizeof(int));
174 for(i = 0; i < code->length; i++)
175 code->recode[i] = huff.nums[i];
176 }
177 }
178 /* free allocated memory */
179 av_free(huff.nums);
180 av_free(huff.bits);
181 av_free(huff.lens);
115329f1 182
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183 return res;
184}
185
186static void tm2_free_codes(TM2Codes *code)
187{
188 if(code->recode)
189 av_free(code->recode);
190 if(code->vlc.table)
191 free_vlc(&code->vlc);
192}
193
194static inline int tm2_get_token(GetBitContext *gb, TM2Codes *code)
195{
196 int val;
197 val = get_vlc2(gb, code->vlc.table, code->bits, 1);
198 return code->recode[val];
199}
200
a8a8f204 201static inline int tm2_read_header(TM2Context *ctx, const uint8_t *buf)
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202{
203 uint32_t magic;
a8a8f204 204 const uint8_t *obuf;
64af6168 205 int length;
115329f1 206
64af6168 207 obuf = buf;
115329f1 208
fead30d4 209 magic = AV_RL32(buf);
64af6168 210 buf += 4;
115329f1 211
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212 if(magic == 0x00000100) { /* old header */
213/* av_log (ctx->avctx, AV_LOG_ERROR, "TM2 old header: not implemented (yet)\n"); */
214 return 40;
215 } else if(magic == 0x00000101) { /* new header */
216 int w, h, size, flags, xr, yr;
115329f1 217
fead30d4 218 length = AV_RL32(buf);
64af6168 219 buf += 4;
115329f1 220
adeba281 221 init_get_bits(&ctx->gb, buf, 32 * 8);
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222 size = get_bits_long(&ctx->gb, 31);
223 h = get_bits(&ctx->gb, 15);
224 w = get_bits(&ctx->gb, 15);
225 flags = get_bits_long(&ctx->gb, 31);
226 yr = get_bits(&ctx->gb, 9);
227 xr = get_bits(&ctx->gb, 9);
115329f1 228
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229 return 40;
230 } else {
231 av_log (ctx->avctx, AV_LOG_ERROR, "Not a TM2 header: 0x%08X\n", magic);
232 return -1;
233 }
115329f1 234
ccd425e7 235 return buf - obuf;
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236}
237
238static int tm2_read_deltas(TM2Context *ctx, int stream_id) {
239 int d, mb;
240 int i, v;
115329f1 241
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242 d = get_bits(&ctx->gb, 9);
243 mb = get_bits(&ctx->gb, 5);
115329f1 244
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245 if((d < 1) || (d > TM2_DELTAS) || (mb < 1) || (mb > 32)) {
246 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect delta table: %i deltas x %i bits\n", d, mb);
247 return -1;
248 }
115329f1 249
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250 for(i = 0; i < d; i++) {
251 v = get_bits_long(&ctx->gb, mb);
252 if(v & (1 << (mb - 1)))
253 ctx->deltas[stream_id][i] = v - (1 << mb);
254 else
255 ctx->deltas[stream_id][i] = v;
256 }
257 for(; i < TM2_DELTAS; i++)
258 ctx->deltas[stream_id][i] = 0;
115329f1 259
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260 return 0;
261}
262
a8a8f204 263static int tm2_read_stream(TM2Context *ctx, const uint8_t *buf, int stream_id) {
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264 int i;
265 int cur = 0;
266 int skip = 0;
267 int len, toks;
268 TM2Codes codes;
115329f1 269
64af6168 270 /* get stream length in dwords */
fead30d4 271 len = AV_RB32(buf); buf += 4; cur += 4;
64af6168 272 skip = len * 4 + 4;
115329f1 273
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274 if(len == 0)
275 return 4;
115329f1 276
fead30d4 277 toks = AV_RB32(buf); buf += 4; cur += 4;
64af6168 278 if(toks & 1) {
fead30d4 279 len = AV_RB32(buf); buf += 4; cur += 4;
64af6168 280 if(len == TM2_ESCAPE) {
fead30d4 281 len = AV_RB32(buf); buf += 4; cur += 4;
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282 }
283 if(len > 0) {
adeba281 284 init_get_bits(&ctx->gb, buf, (skip - cur) * 8);
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285 if(tm2_read_deltas(ctx, stream_id) == -1)
286 return -1;
287 buf += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
288 cur += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
289 }
290 }
291 /* skip unused fields */
fead30d4 292 if(AV_RB32(buf) == TM2_ESCAPE) {
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293 buf += 4; cur += 4; /* some unknown length - could be escaped too */
294 }
295 buf += 4; cur += 4;
296 buf += 4; cur += 4; /* unused by decoder */
115329f1 297
adeba281 298 init_get_bits(&ctx->gb, buf, (skip - cur) * 8);
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299 if(tm2_build_huff_table(ctx, &codes) == -1)
300 return -1;
301 buf += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
302 cur += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
115329f1 303
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304 toks >>= 1;
305 /* check if we have sane number of tokens */
306 if((toks < 0) || (toks > 0xFFFFFF)){
307 av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
308 tm2_free_codes(&codes);
309 return -1;
310 }
311 ctx->tokens[stream_id] = av_realloc(ctx->tokens[stream_id], toks * sizeof(int));
312 ctx->tok_lens[stream_id] = toks;
fead30d4 313 len = AV_RB32(buf); buf += 4; cur += 4;
64af6168 314 if(len > 0) {
adeba281 315 init_get_bits(&ctx->gb, buf, (skip - cur) * 8);
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316 for(i = 0; i < toks; i++)
317 ctx->tokens[stream_id][i] = tm2_get_token(&ctx->gb, &codes);
318 } else {
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319 for(i = 0; i < toks; i++)
320 ctx->tokens[stream_id][i] = codes.recode[0];
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321 }
322 tm2_free_codes(&codes);
115329f1 323
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324 return skip;
325}
326
327static inline int GET_TOK(TM2Context *ctx,int type) {
328 if(ctx->tok_ptrs[type] >= ctx->tok_lens[type]) {
329 av_log(ctx->avctx, AV_LOG_ERROR, "Read token from stream %i out of bounds (%i>=%i)\n", type, ctx->tok_ptrs[type], ctx->tok_lens[type]);
330 return 0;
331 }
332 if(type <= TM2_MOT)
333 return ctx->deltas[type][ctx->tokens[type][ctx->tok_ptrs[type]++]];
334 return ctx->tokens[type][ctx->tok_ptrs[type]++];
335}
336
337/* blocks decoding routines */
338
339/* common Y, U, V pointers initialisation */
670924fd 340#define TM2_INIT_POINTERS() \
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341 int *last, *clast; \
342 int *Y, *U, *V;\
343 int Ystride, Ustride, Vstride;\
344\
345 Ystride = ctx->avctx->width;\
346 Vstride = (ctx->avctx->width + 1) >> 1;\
347 Ustride = (ctx->avctx->width + 1) >> 1;\
348 Y = (ctx->cur?ctx->Y2:ctx->Y1) + by * 4 * Ystride + bx * 4;\
349 V = (ctx->cur?ctx->V2:ctx->V1) + by * 2 * Vstride + bx * 2;\
350 U = (ctx->cur?ctx->U2:ctx->U1) + by * 2 * Ustride + bx * 2;\
351 last = ctx->last + bx * 4;\
352 clast = ctx->clast + bx * 4;
353
670924fd 354#define TM2_INIT_POINTERS_2() \
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355 int *Yo, *Uo, *Vo;\
356 int oYstride, oUstride, oVstride;\
357\
358 TM2_INIT_POINTERS();\
359 oYstride = Ystride;\
360 oVstride = Vstride;\
361 oUstride = Ustride;\
362 Yo = (ctx->cur?ctx->Y1:ctx->Y2) + by * 4 * oYstride + bx * 4;\
363 Vo = (ctx->cur?ctx->V1:ctx->V2) + by * 2 * oVstride + bx * 2;\
364 Uo = (ctx->cur?ctx->U1:ctx->U2) + by * 2 * oUstride + bx * 2;
365
366/* recalculate last and delta values for next blocks */
367#define TM2_RECALC_BLOCK(CHR, stride, last, CD) {\
96c5bc46 368 CD[0] = CHR[1] - last[1];\
64af6168 369 CD[1] = (int)CHR[stride + 1] - (int)CHR[1];\
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370 last[0] = (int)CHR[stride + 0];\
371 last[1] = (int)CHR[stride + 1];}
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372
373/* common operations - add deltas to 4x4 block of luma or 2x2 blocks of chroma */
374static inline void tm2_apply_deltas(TM2Context *ctx, int* Y, int stride, int *deltas, int *last)
375{
376 int ct, d;
377 int i, j;
115329f1 378
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379 for(j = 0; j < 4; j++){
380 ct = ctx->D[j];
381 for(i = 0; i < 4; i++){
382 d = deltas[i + j * 4];
383 ct += d;
384 last[i] += ct;
f66e4f5f 385 Y[i] = av_clip_uint8(last[i]);
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386 }
387 Y += stride;
388 ctx->D[j] = ct;
389 }
390}
391
392static inline void tm2_high_chroma(int *data, int stride, int *last, int *CD, int *deltas)
393{
394 int i, j;
395 for(j = 0; j < 2; j++){
396 for(i = 0; i < 2; i++){
397 CD[j] += deltas[i + j * 2];
398 last[i] += CD[j];
96c5bc46 399 data[i] = last[i];
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400 }
401 data += stride;
402 }
403}
404
405static inline void tm2_low_chroma(int *data, int stride, int *clast, int *CD, int *deltas, int bx)
406{
407 int t;
408 int l;
409 int prev;
410
411 if(bx > 0)
412 prev = clast[-3];
413 else
414 prev = 0;
415 t = (CD[0] + CD[1]) >> 1;
48fa22d7 416 l = (prev - CD[0] - CD[1] + clast[1]) >> 1;
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417 CD[1] = CD[0] + CD[1] - t;
418 CD[0] = t;
419 clast[0] = l;
115329f1 420
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421 tm2_high_chroma(data, stride, clast, CD, deltas);
422}
423
424static inline void tm2_hi_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
425{
426 int i;
427 int deltas[16];
428 TM2_INIT_POINTERS();
429
430 /* hi-res chroma */
431 for(i = 0; i < 4; i++) {
432 deltas[i] = GET_TOK(ctx, TM2_C_HI);
433 deltas[i + 4] = GET_TOK(ctx, TM2_C_HI);
434 }
435 tm2_high_chroma(U, Ustride, clast, ctx->CD, deltas);
436 tm2_high_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas + 4);
115329f1 437
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438 /* hi-res luma */
439 for(i = 0; i < 16; i++)
440 deltas[i] = GET_TOK(ctx, TM2_L_HI);
115329f1 441
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442 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
443}
444
445static inline void tm2_med_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
446{
447 int i;
448 int deltas[16];
449 TM2_INIT_POINTERS();
115329f1 450
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451 /* low-res chroma */
452 deltas[0] = GET_TOK(ctx, TM2_C_LO);
453 deltas[1] = deltas[2] = deltas[3] = 0;
454 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
455
456 deltas[0] = GET_TOK(ctx, TM2_C_LO);
457 deltas[1] = deltas[2] = deltas[3] = 0;
458 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
459
460 /* hi-res luma */
461 for(i = 0; i < 16; i++)
462 deltas[i] = GET_TOK(ctx, TM2_L_HI);
115329f1 463
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464 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
465}
466
467static inline void tm2_low_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
468{
469 int i;
470 int t1, t2;
471 int deltas[16];
472 TM2_INIT_POINTERS();
473
474 /* low-res chroma */
475 deltas[0] = GET_TOK(ctx, TM2_C_LO);
476 deltas[1] = deltas[2] = deltas[3] = 0;
477 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
478
479 deltas[0] = GET_TOK(ctx, TM2_C_LO);
480 deltas[1] = deltas[2] = deltas[3] = 0;
481 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
482
483 /* low-res luma */
484 for(i = 0; i < 16; i++)
485 deltas[i] = 0;
115329f1 486
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487 deltas[ 0] = GET_TOK(ctx, TM2_L_LO);
488 deltas[ 2] = GET_TOK(ctx, TM2_L_LO);
489 deltas[ 8] = GET_TOK(ctx, TM2_L_LO);
490 deltas[10] = GET_TOK(ctx, TM2_L_LO);
115329f1 491
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492 if(bx > 0)
493 last[0] = (last[-1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3] + last[1]) >> 1;
494 else
495 last[0] = (last[1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3])>> 1;
496 last[2] = (last[1] + last[3]) >> 1;
497
498 t1 = ctx->D[0] + ctx->D[1];
499 ctx->D[0] = t1 >> 1;
500 ctx->D[1] = t1 - (t1 >> 1);
501 t2 = ctx->D[2] + ctx->D[3];
502 ctx->D[2] = t2 >> 1;
503 ctx->D[3] = t2 - (t2 >> 1);
115329f1 504
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505 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
506}
507
508static inline void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
509{
510 int i;
511 int ct;
512 int left, right, diff;
513 int deltas[16];
514 TM2_INIT_POINTERS();
115329f1 515
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516 /* null chroma */
517 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
518 tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
519
520 deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
521 tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
115329f1 522
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523 /* null luma */
524 for(i = 0; i < 16; i++)
525 deltas[i] = 0;
526
527 ct = ctx->D[0] + ctx->D[1] + ctx->D[2] + ctx->D[3];
115329f1 528
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529 if(bx > 0)
530 left = last[-1] - ct;
531 else
532 left = 0;
115329f1 533
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534 right = last[3];
535 diff = right - left;
536 last[0] = left + (diff >> 2);
537 last[1] = left + (diff >> 1);
538 last[2] = right - (diff >> 2);
539 last[3] = right;
540 {
541 int tp = left;
115329f1 542
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543 ctx->D[0] = (tp + (ct >> 2)) - left;
544 left += ctx->D[0];
545 ctx->D[1] = (tp + (ct >> 1)) - left;
546 left += ctx->D[1];
547 ctx->D[2] = ((tp + ct) - (ct >> 2)) - left;
548 left += ctx->D[2];
549 ctx->D[3] = (tp + ct) - left;
550 }
551 tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
552}
553
554static inline void tm2_still_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
555{
556 int i, j;
557 TM2_INIT_POINTERS_2();
558
559 /* update chroma */
560 for(j = 0; j < 2; j++){
561 for(i = 0; i < 2; i++){
562 U[i] = Uo[i];
563 V[i] = Vo[i];
564 }
565 U += Ustride; V += Vstride;
566 Uo += oUstride; Vo += oVstride;
567 }
568 U -= Ustride * 2;
569 V -= Vstride * 2;
570 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
571 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
572
573 /* update deltas */
574 ctx->D[0] = Yo[3] - last[3];
575 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
576 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
577 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
578
579 for(j = 0; j < 4; j++){
580 for(i = 0; i < 4; i++){
581 Y[i] = Yo[i];
582 last[i] = Yo[i];
583 }
584 Y += Ystride;
585 Yo += oYstride;
586 }
587}
588
589static inline void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
590{
591 int i, j;
592 int d;
593 TM2_INIT_POINTERS_2();
115329f1 594
64af6168
MM
595 /* update chroma */
596 for(j = 0; j < 2; j++){
597 for(i = 0; i < 2; i++){
598 U[i] = Uo[i] + GET_TOK(ctx, TM2_UPD);
599 V[i] = Vo[i] + GET_TOK(ctx, TM2_UPD);
600 }
601 U += Ustride; V += Vstride;
602 Uo += oUstride; Vo += oVstride;
603 }
604 U -= Ustride * 2;
605 V -= Vstride * 2;
606 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
607 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
608
609 /* update deltas */
610 ctx->D[0] = Yo[3] - last[3];
611 ctx->D[1] = Yo[3 + oYstride] - Yo[3];
612 ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
613 ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
614
615 for(j = 0; j < 4; j++){
616 d = last[3];
617 for(i = 0; i < 4; i++){
618 Y[i] = Yo[i] + GET_TOK(ctx, TM2_UPD);
619 last[i] = Y[i];
620 }
621 ctx->D[j] = last[3] - d;
622 Y += Ystride;
623 Yo += oYstride;
624 }
625}
626
627static inline void tm2_motion_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
628{
629 int i, j;
630 int mx, my;
631 TM2_INIT_POINTERS_2();
632
633 mx = GET_TOK(ctx, TM2_MOT);
634 my = GET_TOK(ctx, TM2_MOT);
115329f1 635
64af6168
MM
636 Yo += my * oYstride + mx;
637 Uo += (my >> 1) * oUstride + (mx >> 1);
638 Vo += (my >> 1) * oVstride + (mx >> 1);
115329f1 639
64af6168
MM
640 /* copy chroma */
641 for(j = 0; j < 2; j++){
642 for(i = 0; i < 2; i++){
643 U[i] = Uo[i];
644 V[i] = Vo[i];
645 }
646 U += Ustride; V += Vstride;
647 Uo += oUstride; Vo += oVstride;
648 }
649 U -= Ustride * 2;
650 V -= Vstride * 2;
651 TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
652 TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
653
654 /* copy luma */
655 for(j = 0; j < 4; j++){
656 for(i = 0; i < 4; i++){
657 Y[i] = Yo[i];
658 }
659 Y += Ystride;
660 Yo += oYstride;
661 }
662 /* calculate deltas */
663 Y -= Ystride * 4;
664 ctx->D[0] = Y[3] - last[3];
665 ctx->D[1] = Y[3 + Ystride] - Y[3];
666 ctx->D[2] = Y[3 + Ystride * 2] - Y[3 + Ystride];
667 ctx->D[3] = Y[3 + Ystride * 3] - Y[3 + Ystride * 2];
668 for(i = 0; i < 4; i++)
669 last[i] = Y[i + Ystride * 3];
670}
671
672static int tm2_decode_blocks(TM2Context *ctx, AVFrame *p)
673{
674 int i, j;
675 int bw, bh;
676 int type;
677 int keyframe = 1;
96c5bc46
RD
678 int *Y, *U, *V;
679 uint8_t *dst;
115329f1 680
64af6168
MM
681 bw = ctx->avctx->width >> 2;
682 bh = ctx->avctx->height >> 2;
683
684 for(i = 0; i < TM2_NUM_STREAMS; i++)
685 ctx->tok_ptrs[i] = 0;
115329f1 686
64af6168
MM
687 if (ctx->tok_lens[TM2_TYPE]<bw*bh){
688 av_log(ctx->avctx,AV_LOG_ERROR,"Got %i tokens for %i blocks\n",ctx->tok_lens[TM2_TYPE],bw*bh);
689 return -1;
690 }
115329f1 691
64af6168
MM
692 memset(ctx->last, 0, 4 * bw * sizeof(int));
693 memset(ctx->clast, 0, 4 * bw * sizeof(int));
694
695 for(j = 0; j < bh; j++) {
696 memset(ctx->D, 0, 4 * sizeof(int));
697 memset(ctx->CD, 0, 4 * sizeof(int));
698 for(i = 0; i < bw; i++) {
699 type = GET_TOK(ctx, TM2_TYPE);
700 switch(type) {
701 case TM2_HI_RES:
702 tm2_hi_res_block(ctx, p, i, j);
703 break;
704 case TM2_MED_RES:
705 tm2_med_res_block(ctx, p, i, j);
706 break;
707 case TM2_LOW_RES:
708 tm2_low_res_block(ctx, p, i, j);
709 break;
710 case TM2_NULL_RES:
711 tm2_null_res_block(ctx, p, i, j);
712 break;
713 case TM2_UPDATE:
714 tm2_update_block(ctx, p, i, j);
715 keyframe = 0;
716 break;
717 case TM2_STILL:
718 tm2_still_block(ctx, p, i, j);
719 keyframe = 0;
720 break;
721 case TM2_MOTION:
722 tm2_motion_block(ctx, p, i, j);
723 keyframe = 0;
724 break;
725 default:
726 av_log(ctx->avctx, AV_LOG_ERROR, "Skipping unknown block type %i\n", type);
727 }
728 }
729 }
115329f1
DB
730
731 /* copy data from our buffer to AVFrame */
96c5bc46
RD
732 Y = (ctx->cur?ctx->Y2:ctx->Y1);
733 U = (ctx->cur?ctx->U2:ctx->U1);
734 V = (ctx->cur?ctx->V2:ctx->V1);
735 dst = p->data[0];
64af6168
MM
736 for(j = 0; j < ctx->avctx->height; j++){
737 for(i = 0; i < ctx->avctx->width; i++){
96c5bc46
RD
738 int y = Y[i], u = U[i >> 1], v = V[i >> 1];
739 dst[3*i+0] = av_clip_uint8(y + v);
740 dst[3*i+1] = av_clip_uint8(y);
741 dst[3*i+2] = av_clip_uint8(y + u);
64af6168 742 }
96c5bc46
RD
743 Y += ctx->avctx->width;
744 if (j & 1) {
745 U += ctx->avctx->width >> 1;
746 V += ctx->avctx->width >> 1;
64af6168 747 }
96c5bc46 748 dst += p->linesize[0];
64af6168 749 }
115329f1 750
64af6168
MM
751 return keyframe;
752}
753
a2a98637
KS
754static const int tm2_stream_order[TM2_NUM_STREAMS] = {
755 TM2_C_HI, TM2_C_LO, TM2_L_HI, TM2_L_LO, TM2_UPD, TM2_MOT, TM2_TYPE
756};
757
115329f1 758static int decode_frame(AVCodecContext *avctx,
64af6168 759 void *data, int *data_size,
7a00bbad 760 AVPacket *avpkt)
64af6168 761{
7a00bbad
TB
762 const uint8_t *buf = avpkt->data;
763 int buf_size = avpkt->size;
64af6168
MM
764 TM2Context * const l = avctx->priv_data;
765 AVFrame * const p= (AVFrame*)&l->pic;
a2a98637 766 int i, skip, t;
ad4d0b9e 767 uint8_t *swbuf;
64af6168 768
ad4d0b9e
KS
769 swbuf = av_malloc(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
770 if(!swbuf){
771 av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n");
772 return -1;
773 }
64af6168 774 p->reference = 1;
adeba281
MM
775 p->buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
776 if(avctx->reget_buffer(avctx, p) < 0){
64af6168 777 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
ad4d0b9e 778 av_free(swbuf);
64af6168
MM
779 return -1;
780 }
781
ad4d0b9e
KS
782 l->dsp.bswap_buf((uint32_t*)swbuf, (const uint32_t*)buf, buf_size >> 2);
783 skip = tm2_read_header(l, swbuf);
115329f1 784
ad4d0b9e
KS
785 if(skip == -1){
786 av_free(swbuf);
64af6168 787 return -1;
ad4d0b9e 788 }
115329f1 789
a2a98637 790 for(i = 0; i < TM2_NUM_STREAMS; i++){
ad4d0b9e 791 t = tm2_read_stream(l, swbuf + skip, tm2_stream_order[i]);
a2a98637 792 if(t == -1){
ad4d0b9e 793 av_free(swbuf);
a2a98637
KS
794 return -1;
795 }
796 skip += t;
797 }
64af6168
MM
798 p->key_frame = tm2_decode_blocks(l, p);
799 if(p->key_frame)
800 p->pict_type = FF_I_TYPE;
801 else
802 p->pict_type = FF_P_TYPE;
115329f1 803
64af6168
MM
804 l->cur = !l->cur;
805 *data_size = sizeof(AVFrame);
806 *(AVFrame*)data = l->pic;
ad4d0b9e 807 av_free(swbuf);
115329f1 808
64af6168
MM
809 return buf_size;
810}
811
98a6fff9 812static av_cold int decode_init(AVCodecContext *avctx){
64af6168
MM
813 TM2Context * const l = avctx->priv_data;
814 int i;
815
64af6168
MM
816 if((avctx->width & 3) || (avctx->height & 3)){
817 av_log(avctx, AV_LOG_ERROR, "Width and height must be multiple of 4\n");
818 return -1;
819 }
115329f1 820
64af6168
MM
821 l->avctx = avctx;
822 l->pic.data[0]=NULL;
96c5bc46 823 avctx->pix_fmt = PIX_FMT_BGR24;
64af6168
MM
824
825 dsputil_init(&l->dsp, avctx);
115329f1 826
64af6168
MM
827 l->last = av_malloc(4 * sizeof(int) * (avctx->width >> 2));
828 l->clast = av_malloc(4 * sizeof(int) * (avctx->width >> 2));
115329f1 829
64af6168
MM
830 for(i = 0; i < TM2_NUM_STREAMS; i++) {
831 l->tokens[i] = NULL;
832 l->tok_lens[i] = 0;
833 }
115329f1 834
64af6168
MM
835 l->Y1 = av_malloc(sizeof(int) * avctx->width * avctx->height);
836 l->U1 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1));
837 l->V1 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1));
838 l->Y2 = av_malloc(sizeof(int) * avctx->width * avctx->height);
839 l->U2 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1));
840 l->V2 = av_malloc(sizeof(int) * ((avctx->width + 1) >> 1) * ((avctx->height + 1) >> 1));
841 l->cur = 0;
115329f1 842
64af6168
MM
843 return 0;
844}
845
98a6fff9 846static av_cold int decode_end(AVCodecContext *avctx){
64af6168 847 TM2Context * const l = avctx->priv_data;
6d924b5a 848 AVFrame *pic = &l->pic;
64af6168
MM
849 int i;
850
851 if(l->last)
852 av_free(l->last);
853 if(l->clast)
854 av_free(l->clast);
855 for(i = 0; i < TM2_NUM_STREAMS; i++)
856 if(l->tokens[i])
857 av_free(l->tokens[i]);
858 if(l->Y1){
859 av_free(l->Y1);
860 av_free(l->U1);
861 av_free(l->V1);
862 av_free(l->Y2);
863 av_free(l->U2);
864 av_free(l->V2);
865 }
6d924b5a
KS
866
867 if (pic->data[0])
868 avctx->release_buffer(avctx, pic);
6d924b5a 869
64af6168
MM
870 return 0;
871}
872
873AVCodec truemotion2_decoder = {
874 "truemotion2",
72415b2a 875 AVMEDIA_TYPE_VIDEO,
64af6168
MM
876 CODEC_ID_TRUEMOTION2,
877 sizeof(TM2Context),
878 decode_init,
879 NULL,
880 decode_end,
881 decode_frame,
882 CODEC_CAP_DR1,
fe4bf374 883 .long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 2.0"),
64af6168 884};