Statistics
| Branch: | Revision:

ffmpeg / libavcodec / bink.c @ 54d4c0de

History | View | Annotate | Download (33.1 KB)

1
/*
2
 * Bink video decoder
3
 * Copyright (c) 2009 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
#include "avcodec.h"
23
#include "dsputil.h"
24
#include "binkdata.h"
25
#include "mathops.h"
26

    
27
#define ALT_BITSTREAM_READER_LE
28
#include "get_bits.h"
29

    
30
#define BINK_FLAG_ALPHA 0x00100000
31
#define BINK_FLAG_GRAY  0x00020000
32

    
33
static VLC bink_trees[16];
34

    
35
/**
36
 * IDs for different data types used in Bink video codec
37
 */
38
enum Sources {
39
    BINK_SRC_BLOCK_TYPES = 0, ///< 8x8 block types
40
    BINK_SRC_SUB_BLOCK_TYPES, ///< 16x16 block types (a subset of 8x8 block types)
41
    BINK_SRC_COLORS,          ///< pixel values used for different block types
42
    BINK_SRC_PATTERN,         ///< 8-bit values for 2-colour pattern fill
43
    BINK_SRC_X_OFF,           ///< X components of motion value
44
    BINK_SRC_Y_OFF,           ///< Y components of motion value
45
    BINK_SRC_INTRA_DC,        ///< DC values for intrablocks with DCT
46
    BINK_SRC_INTER_DC,        ///< DC values for intrablocks with DCT
47
    BINK_SRC_RUN,             ///< run lengths for special fill block
48

    
49
    BINK_NB_SRC
50
};
51

    
52
/**
53
 * data needed to decode 4-bit Huffman-coded value
54
 */
55
typedef struct Tree {
56
    int     vlc_num;  ///< tree number (in bink_trees[])
57
    uint8_t syms[16]; ///< leaf value to symbol mapping
58
} Tree;
59

    
60
#define GET_HUFF(gb, tree)  (tree).syms[get_vlc2(gb, bink_trees[(tree).vlc_num].table,\
61
                                                 bink_trees[(tree).vlc_num].bits, 1)]
62

    
63
/**
64
 * data structure used for decoding single Bink data type
65
 */
66
typedef struct Bundle {
67
    int     len;       ///< length of number of entries to decode (in bits)
68
    Tree    tree;      ///< Huffman tree-related data
69
    uint8_t *data;     ///< buffer for decoded symbols
70
    uint8_t *data_end; ///< buffer end
71
    uint8_t *cur_dec;  ///< pointer to the not yet decoded part of the buffer
72
    uint8_t *cur_ptr;  ///< pointer to the data that is not read from buffer yet
73
} Bundle;
74

    
75
/*
76
 * Decoder context
77
 */
78
typedef struct BinkContext {
79
    AVCodecContext *avctx;
80
    DSPContext     dsp;
81
    AVFrame        pic, last;
82
    int            version;              ///< internal Bink file version
83
    int            has_alpha;
84
    int            swap_planes;
85
    ScanTable      scantable;            ///< permutated scantable for DCT coeffs decoding
86

    
87
    Bundle         bundle[BINK_NB_SRC];  ///< bundles for decoding all data types
88
    Tree           col_high[16];         ///< trees for decoding high nibble in "colours" data type
89
    int            col_lastval;          ///< value of last decoded high nibble in "colours" data type
90
} BinkContext;
91

    
92
/**
93
 * Bink video block types
94
 */
95
enum BlockTypes {
96
    SKIP_BLOCK = 0, ///< skipped block
97
    SCALED_BLOCK,   ///< block has size 16x16
98
    MOTION_BLOCK,   ///< block is copied from previous frame with some offset
99
    RUN_BLOCK,      ///< block is composed from runs of colours with custom scan order
100
    RESIDUE_BLOCK,  ///< motion block with some difference added
101
    INTRA_BLOCK,    ///< intra DCT block
102
    FILL_BLOCK,     ///< block is filled with single colour
103
    INTER_BLOCK,    ///< motion block with DCT applied to the difference
104
    PATTERN_BLOCK,  ///< block is filled with two colours following custom pattern
105
    RAW_BLOCK,      ///< uncoded 8x8 block
106
};
107

    
108
/**
109
 * Initializes length length in all bundles.
110
 *
111
 * @param c     decoder context
112
 * @param width plane width
113
 * @param bw    plane width in 8x8 blocks
114
 */
115
static void init_lengths(BinkContext *c, int width, int bw)
116
{
117
    c->bundle[BINK_SRC_BLOCK_TYPES].len = av_log2((width >> 3) + 511) + 1;
118

    
119
    c->bundle[BINK_SRC_SUB_BLOCK_TYPES].len = av_log2((width >> 4) + 511) + 1;
120

    
121
    c->bundle[BINK_SRC_COLORS].len = av_log2((width >> 3)*64 + 511) + 1;
122

    
123
    c->bundle[BINK_SRC_INTRA_DC].len =
124
    c->bundle[BINK_SRC_INTER_DC].len =
125
    c->bundle[BINK_SRC_X_OFF].len =
126
    c->bundle[BINK_SRC_Y_OFF].len = av_log2((width >> 3) + 511) + 1;
127

    
128
    c->bundle[BINK_SRC_PATTERN].len = av_log2((bw << 3) + 511) + 1;
129

    
130
    c->bundle[BINK_SRC_RUN].len = av_log2((width >> 3)*48 + 511) + 1;
131
}
132

    
133
/**
134
 * Allocates memory for bundles.
135
 *
136
 * @param c decoder context
137
 */
138
static av_cold void init_bundles(BinkContext *c)
139
{
140
    int bw, bh, blocks;
141
    int i;
142

    
143
    bw = (c->avctx->width  + 7) >> 3;
144
    bh = (c->avctx->height + 7) >> 3;
145
    blocks = bw * bh;
146

    
147
    for (i = 0; i < BINK_NB_SRC; i++) {
148
        c->bundle[i].data = av_malloc(blocks * 64);
149
        c->bundle[i].data_end = c->bundle[i].data + blocks * 64;
150
    }
151
}
152

    
153
/**
154
 * Frees memory used by bundles.
155
 *
156
 * @param c decoder context
157
 */
158
static av_cold void free_bundles(BinkContext *c)
159
{
160
    int i;
161
    for (i = 0; i < BINK_NB_SRC; i++)
162
        av_freep(&c->bundle[i].data);
163
}
164

    
165
/**
166
 * Merges two consequent lists of equal size depending on bits read.
167
 *
168
 * @param gb   context for reading bits
169
 * @param dst  buffer where merged list will be written to
170
 * @param src  pointer to the head of the first list (the second lists starts at src+size)
171
 * @param size input lists size
172
 */
173
static void merge(GetBitContext *gb, uint8_t *dst, uint8_t *src, int size)
174
{
175
    uint8_t *src2 = src + size;
176
    int size2 = size;
177

    
178
    do {
179
        if (!get_bits1(gb)) {
180
            *dst++ = *src++;
181
            size--;
182
        } else {
183
            *dst++ = *src2++;
184
            size2--;
185
        }
186
    } while (size && size2);
187

    
188
    while (size--)
189
        *dst++ = *src++;
190
    while (size2--)
191
        *dst++ = *src2++;
192
}
193

    
194
/**
195
 * Reads information about Huffman tree used to decode data.
196
 *
197
 * @param gb   context for reading bits
198
 * @param tree pointer for storing tree data
199
 */
200
static void read_tree(GetBitContext *gb, Tree *tree)
201
{
202
    uint8_t tmp1[16], tmp2[16], *in = tmp1, *out = tmp2;
203
    int i, t, len;
204

    
205
    tree->vlc_num = get_bits(gb, 4);
206
    if (!tree->vlc_num) {
207
        for (i = 0; i < 16; i++)
208
            tree->syms[i] = i;
209
        return;
210
    }
211
    if (get_bits1(gb)) {
212
        len = get_bits(gb, 3);
213
        memset(tmp1, 0, sizeof(tmp1));
214
        for (i = 0; i <= len; i++) {
215
            tree->syms[i] = get_bits(gb, 4);
216
            tmp1[tree->syms[i]] = 1;
217
        }
218
        for (i = 0; i < 16; i++)
219
            if (!tmp1[i])
220
                tree->syms[++len] = i;
221
    } else {
222
        len = get_bits(gb, 2);
223
        for (i = 0; i < 16; i++)
224
            in[i] = i;
225
        for (i = 0; i <= len; i++) {
226
            int size = 1 << i;
227
            for (t = 0; t < 16; t += size << 1)
228
                merge(gb, out + t, in + t, size);
229
            FFSWAP(uint8_t*, in, out);
230
        }
231
        memcpy(tree->syms, in, 16);
232
    }
233
}
234

    
235
/**
236
 * Prepares bundle for decoding data.
237
 *
238
 * @param gb          context for reading bits
239
 * @param c           decoder context
240
 * @param bundle_num  number of the bundle to initialize
241
 */
242
static void read_bundle(GetBitContext *gb, BinkContext *c, int bundle_num)
243
{
244
    int i;
245

    
246
    if (bundle_num == BINK_SRC_COLORS) {
247
        for (i = 0; i < 16; i++)
248
            read_tree(gb, &c->col_high[i]);
249
        c->col_lastval = 0;
250
    }
251
    if (bundle_num != BINK_SRC_INTRA_DC && bundle_num != BINK_SRC_INTER_DC)
252
        read_tree(gb, &c->bundle[bundle_num].tree);
253
    c->bundle[bundle_num].cur_dec =
254
    c->bundle[bundle_num].cur_ptr = c->bundle[bundle_num].data;
255
}
256

    
257
/**
258
 * common check before starting decoding bundle data
259
 *
260
 * @param gb context for reading bits
261
 * @param b  bundle
262
 * @param t  variable where number of elements to decode will be stored
263
 */
264
#define CHECK_READ_VAL(gb, b, t) \
265
    if (!b->cur_dec || (b->cur_dec > b->cur_ptr)) \
266
        return 0; \
267
    t = get_bits(gb, b->len); \
268
    if (!t) { \
269
        b->cur_dec = NULL; \
270
        return 0; \
271
    } \
272

    
273
static int read_runs(AVCodecContext *avctx, GetBitContext *gb, Bundle *b)
274
{
275
    int t, v;
276
    const uint8_t *dec_end;
277

    
278
    CHECK_READ_VAL(gb, b, t);
279
    dec_end = b->cur_dec + t;
280
    if (dec_end > b->data_end) {
281
        av_log(avctx, AV_LOG_ERROR, "Run value went out of bounds\n");
282
        return -1;
283
    }
284
    if (get_bits1(gb)) {
285
        v = get_bits(gb, 4);
286
        memset(b->cur_dec, v, t);
287
        b->cur_dec += t;
288
    } else {
289
        while (b->cur_dec < dec_end)
290
            *b->cur_dec++ = GET_HUFF(gb, b->tree);
291
    }
292
    return 0;
293
}
294

    
295
static int read_motion_values(AVCodecContext *avctx, GetBitContext *gb, Bundle *b)
296
{
297
    int t, sign, v;
298
    const uint8_t *dec_end;
299

    
300
    CHECK_READ_VAL(gb, b, t);
301
    dec_end = b->cur_dec + t;
302
    if (dec_end > b->data_end) {
303
        av_log(avctx, AV_LOG_ERROR, "Too many motion values\n");
304
        return -1;
305
    }
306
    if (get_bits1(gb)) {
307
        v = get_bits(gb, 4);
308
        if (v) {
309
            sign = -get_bits1(gb);
310
            v = (v ^ sign) - sign;
311
        }
312
        memset(b->cur_dec, v, t);
313
        b->cur_dec += t;
314
    } else {
315
        do {
316
            v = GET_HUFF(gb, b->tree);
317
            if (v) {
318
                sign = -get_bits1(gb);
319
                v = (v ^ sign) - sign;
320
            }
321
            *b->cur_dec++ = v;
322
        } while (b->cur_dec < dec_end);
323
    }
324
    return 0;
325
}
326

    
327
const uint8_t bink_rlelens[4] = { 4, 8, 12, 32 };
328

    
329
static int read_block_types(AVCodecContext *avctx, GetBitContext *gb, Bundle *b)
330
{
331
    int t, v;
332
    int last = 0;
333
    const uint8_t *dec_end;
334

    
335
    CHECK_READ_VAL(gb, b, t);
336
    dec_end = b->cur_dec + t;
337
    if (dec_end > b->data_end) {
338
        av_log(avctx, AV_LOG_ERROR, "Too many block type values\n");
339
        return -1;
340
    }
341
    if (get_bits1(gb)) {
342
        v = get_bits(gb, 4);
343
        memset(b->cur_dec, v, t);
344
        b->cur_dec += t;
345
    } else {
346
        do {
347
            v = GET_HUFF(gb, b->tree);
348
            if (v < 12) {
349
                last = v;
350
                *b->cur_dec++ = v;
351
            } else {
352
                int run = bink_rlelens[v - 12];
353

    
354
                memset(b->cur_dec, last, run);
355
                b->cur_dec += run;
356
            }
357
        } while (b->cur_dec < dec_end);
358
    }
359
    return 0;
360
}
361

    
362
static int read_patterns(AVCodecContext *avctx, GetBitContext *gb, Bundle *b)
363
{
364
    int t, v;
365
    const uint8_t *dec_end;
366

    
367
    CHECK_READ_VAL(gb, b, t);
368
    dec_end = b->cur_dec + t;
369
    if (dec_end > b->data_end) {
370
        av_log(avctx, AV_LOG_ERROR, "Too many pattern values\n");
371
        return -1;
372
    }
373
    while (b->cur_dec < dec_end) {
374
        v  = GET_HUFF(gb, b->tree);
375
        v |= GET_HUFF(gb, b->tree) << 4;
376
        *b->cur_dec++ = v;
377
    }
378

    
379
    return 0;
380
}
381

    
382
static int read_colors(GetBitContext *gb, Bundle *b, BinkContext *c)
383
{
384
    int t, sign, v;
385
    const uint8_t *dec_end;
386

    
387
    CHECK_READ_VAL(gb, b, t);
388
    dec_end = b->cur_dec + t;
389
    if (dec_end > b->data_end) {
390
        av_log(c->avctx, AV_LOG_ERROR, "Too many color values\n");
391
        return -1;
392
    }
393
    if (get_bits1(gb)) {
394
        c->col_lastval = GET_HUFF(gb, c->col_high[c->col_lastval]);
395
        v = GET_HUFF(gb, b->tree);
396
        v = (c->col_lastval << 4) | v;
397
        if (c->version < 'i') {
398
            sign = ((int8_t) v) >> 7;
399
            v = ((v & 0x7F) ^ sign) - sign;
400
            v += 0x80;
401
        }
402
        memset(b->cur_dec, v, t);
403
        b->cur_dec += t;
404
    } else {
405
        while (b->cur_dec < dec_end) {
406
            c->col_lastval = GET_HUFF(gb, c->col_high[c->col_lastval]);
407
            v = GET_HUFF(gb, b->tree);
408
            v = (c->col_lastval << 4) | v;
409
            if (c->version < 'i') {
410
                sign = ((int8_t) v) >> 7;
411
                v = ((v & 0x7F) ^ sign) - sign;
412
                v += 0x80;
413
            }
414
            *b->cur_dec++ = v;
415
        }
416
    }
417
    return 0;
418
}
419

    
420
/** number of bits used to store first DC value in bundle */
421
#define DC_START_BITS 11
422

    
423
static int read_dcs(AVCodecContext *avctx, GetBitContext *gb, Bundle *b,
424
                    int start_bits, int has_sign)
425
{
426
    int i, j, len, len2, bsize, sign, v, v2;
427
    int16_t *dst = (int16_t*)b->cur_dec;
428

    
429
    CHECK_READ_VAL(gb, b, len);
430
    v = get_bits(gb, start_bits - has_sign);
431
    if (v && has_sign) {
432
        sign = -get_bits1(gb);
433
        v = (v ^ sign) - sign;
434
    }
435
    *dst++ = v;
436
    len--;
437
    for (i = 0; i < len; i += 8) {
438
        len2 = FFMIN(len - i, 8);
439
        bsize = get_bits(gb, 4);
440
        if (bsize) {
441
            for (j = 0; j < len2; j++) {
442
                v2 = get_bits(gb, bsize);
443
                if (v2) {
444
                    sign = -get_bits1(gb);
445
                    v2 = (v2 ^ sign) - sign;
446
                }
447
                v += v2;
448
                *dst++ = v;
449
                if (v < -32768 || v > 32767) {
450
                    av_log(avctx, AV_LOG_ERROR, "DC value went out of bounds: %d\n", v);
451
                    return -1;
452
                }
453
            }
454
        } else {
455
            for (j = 0; j < len2; j++)
456
                *dst++ = v;
457
        }
458
    }
459

    
460
    b->cur_dec = (uint8_t*)dst;
461
    return 0;
462
}
463

    
464
/**
465
 * Retrieves next value from bundle.
466
 *
467
 * @param c      decoder context
468
 * @param bundle bundle number
469
 */
470
static inline int get_value(BinkContext *c, int bundle)
471
{
472
    int16_t ret;
473

    
474
    if (bundle < BINK_SRC_X_OFF || bundle == BINK_SRC_RUN)
475
        return *c->bundle[bundle].cur_ptr++;
476
    if (bundle == BINK_SRC_X_OFF || bundle == BINK_SRC_Y_OFF)
477
        return (int8_t)*c->bundle[bundle].cur_ptr++;
478
    ret = *(int16_t*)c->bundle[bundle].cur_ptr;
479
    c->bundle[bundle].cur_ptr += 2;
480
    return ret;
481
}
482

    
483
/**
484
 * Reads 8x8 block of DCT coefficients.
485
 *
486
 * @param gb       context for reading bits
487
 * @param block    place for storing coefficients
488
 * @param scan     scan order table
489
 * @param is_intra tells what set of quantizer matrices to use
490
 * @return 0 for success, negative value in other cases
491
 */
492
static int read_dct_coeffs(GetBitContext *gb, DCTELEM block[64], const uint8_t *scan,
493
                           int is_intra)
494
{
495
    int coef_list[128];
496
    int mode_list[128];
497
    int i, t, mask, bits, ccoef, mode, sign;
498
    int list_start = 64, list_end = 64, list_pos;
499
    int coef_count = 0;
500
    int coef_idx[64];
501
    int quant_idx;
502
    const uint32_t *quant;
503

    
504
    coef_list[list_end] = 4;  mode_list[list_end++] = 0;
505
    coef_list[list_end] = 24; mode_list[list_end++] = 0;
506
    coef_list[list_end] = 44; mode_list[list_end++] = 0;
507
    coef_list[list_end] = 1;  mode_list[list_end++] = 3;
508
    coef_list[list_end] = 2;  mode_list[list_end++] = 3;
509
    coef_list[list_end] = 3;  mode_list[list_end++] = 3;
510

    
511
    bits = get_bits(gb, 4) - 1;
512
    for (mask = 1 << bits; bits >= 0; mask >>= 1, bits--) {
513
        list_pos = list_start;
514
        while (list_pos < list_end) {
515
            if (!(mode_list[list_pos] | coef_list[list_pos]) || !get_bits1(gb)) {
516
                list_pos++;
517
                continue;
518
            }
519
            ccoef = coef_list[list_pos];
520
            mode  = mode_list[list_pos];
521
            switch (mode) {
522
            case 0:
523
                coef_list[list_pos] = ccoef + 4;
524
                mode_list[list_pos] = 1;
525
            case 2:
526
                if (mode == 2) {
527
                    coef_list[list_pos]   = 0;
528
                    mode_list[list_pos++] = 0;
529
                }
530
                for (i = 0; i < 4; i++, ccoef++) {
531
                    if (get_bits1(gb)) {
532
                        coef_list[--list_start] = ccoef;
533
                        mode_list[  list_start] = 3;
534
                    } else {
535
                        int t;
536
                        if (!bits) {
537
                            t = 1 - (get_bits1(gb) << 1);
538
                        } else {
539
                            t = get_bits(gb, bits) | mask;
540
                            sign = -get_bits1(gb);
541
                            t = (t ^ sign) - sign;
542
                        }
543
                        block[scan[ccoef]] = t;
544
                        coef_idx[coef_count++] = ccoef;
545
                    }
546
                }
547
                break;
548
            case 1:
549
                mode_list[list_pos] = 2;
550
                for (i = 0; i < 3; i++) {
551
                    ccoef += 4;
552
                    coef_list[list_end]   = ccoef;
553
                    mode_list[list_end++] = 2;
554
                }
555
                break;
556
            case 3:
557
                if (!bits) {
558
                    t = 1 - (get_bits1(gb) << 1);
559
                } else {
560
                    t = get_bits(gb, bits) | mask;
561
                    sign = -get_bits1(gb);
562
                    t = (t ^ sign) - sign;
563
                }
564
                block[scan[ccoef]] = t;
565
                coef_idx[coef_count++] = ccoef;
566
                coef_list[list_pos]   = 0;
567
                mode_list[list_pos++] = 0;
568
                break;
569
            }
570
        }
571
    }
572

    
573
    quant_idx = get_bits(gb, 4);
574
    quant = is_intra ? bink_intra_quant[quant_idx]
575
                     : bink_inter_quant[quant_idx];
576
    block[0] = (block[0] * quant[0]) >> 11;
577
    for (i = 0; i < coef_count; i++) {
578
        int idx = coef_idx[i];
579
        block[scan[idx]] = (block[scan[idx]] * quant[idx]) >> 11;
580
    }
581

    
582
    return 0;
583
}
584

    
585
/**
586
 * Reads 8x8 block with residue after motion compensation.
587
 *
588
 * @param gb          context for reading bits
589
 * @param block       place to store read data
590
 * @param masks_count number of masks to decode
591
 * @return 0 on success, negative value in other cases
592
 */
593
static int read_residue(GetBitContext *gb, DCTELEM block[64], int masks_count)
594
{
595
    int coef_list[128];
596
    int mode_list[128];
597
    int i, sign, mask, ccoef, mode;
598
    int list_start = 64, list_end = 64, list_pos;
599
    int nz_coeff[64];
600
    int nz_coeff_count = 0;
601

    
602
    coef_list[list_end] =  4; mode_list[list_end++] = 0;
603
    coef_list[list_end] = 24; mode_list[list_end++] = 0;
604
    coef_list[list_end] = 44; mode_list[list_end++] = 0;
605
    coef_list[list_end] =  0; mode_list[list_end++] = 2;
606

    
607
    for (mask = 1 << get_bits(gb, 3); mask; mask >>= 1) {
608
        for (i = 0; i < nz_coeff_count; i++) {
609
            if (!get_bits1(gb))
610
                continue;
611
            if (block[nz_coeff[i]] < 0)
612
                block[nz_coeff[i]] -= mask;
613
            else
614
                block[nz_coeff[i]] += mask;
615
            masks_count--;
616
            if (masks_count < 0)
617
                return 0;
618
        }
619
        list_pos = list_start;
620
        while (list_pos < list_end) {
621
            if (!(coef_list[list_pos] | mode_list[list_pos]) || !get_bits1(gb)) {
622
                list_pos++;
623
                continue;
624
            }
625
            ccoef = coef_list[list_pos];
626
            mode  = mode_list[list_pos];
627
            switch (mode) {
628
            case 0:
629
                coef_list[list_pos] = ccoef + 4;
630
                mode_list[list_pos] = 1;
631
            case 2:
632
                if (mode == 2) {
633
                    coef_list[list_pos]   = 0;
634
                    mode_list[list_pos++] = 0;
635
                }
636
                for (i = 0; i < 4; i++, ccoef++) {
637
                    if (get_bits1(gb)) {
638
                        coef_list[--list_start] = ccoef;
639
                        mode_list[  list_start] = 3;
640
                    } else {
641
                        nz_coeff[nz_coeff_count++] = bink_scan[ccoef];
642
                        sign = -get_bits1(gb);
643
                        block[bink_scan[ccoef]] = (mask ^ sign) - sign;
644
                        masks_count--;
645
                        if (masks_count < 0)
646
                            return 0;
647
                    }
648
                }
649
                break;
650
            case 1:
651
                mode_list[list_pos] = 2;
652
                for (i = 0; i < 3; i++) {
653
                    ccoef += 4;
654
                    coef_list[list_end]   = ccoef;
655
                    mode_list[list_end++] = 2;
656
                }
657
                break;
658
            case 3:
659
                nz_coeff[nz_coeff_count++] = bink_scan[ccoef];
660
                sign = -get_bits1(gb);
661
                block[bink_scan[ccoef]] = (mask ^ sign) - sign;
662
                coef_list[list_pos]   = 0;
663
                mode_list[list_pos++] = 0;
664
                masks_count--;
665
                if (masks_count < 0)
666
                    return 0;
667
                break;
668
            }
669
        }
670
    }
671

    
672
    return 0;
673
}
674

    
675
static int bink_decode_plane(BinkContext *c, GetBitContext *gb, int plane_idx,
676
                             int is_chroma)
677
{
678
    int blk;
679
    int i, j, bx, by;
680
    uint8_t *dst, *prev, *ref, *ref_start, *ref_end;
681
    int v, col[2];
682
    const uint8_t *scan;
683
    int xoff, yoff;
684
    DECLARE_ALIGNED_16(DCTELEM, block[64]);
685
    DECLARE_ALIGNED_16(uint8_t, ublock[64]);
686
    int coordmap[64];
687

    
688
        const int stride = c->pic.linesize[plane_idx];
689
        int bw = is_chroma ? (c->avctx->width  + 15) >> 4 : (c->avctx->width  + 7) >> 3;
690
        int bh = is_chroma ? (c->avctx->height + 15) >> 4 : (c->avctx->height + 7) >> 3;
691
        int width = c->avctx->width >> is_chroma;
692

    
693
        init_lengths(c, FFMAX(width, 8), bw);
694
        for (i = 0; i < BINK_NB_SRC; i++)
695
            read_bundle(gb, c, i);
696

    
697
        ref_start = c->last.data[plane_idx];
698
        ref_end   = c->last.data[plane_idx]
699
                    + (bw - 1 + c->last.linesize[plane_idx] * (bh - 1)) * 8;
700

    
701
        for (i = 0; i < 64; i++)
702
            coordmap[i] = (i & 7) + (i >> 3) * stride;
703

    
704
        for (by = 0; by < bh; by++) {
705
            if (read_block_types(c->avctx, gb, &c->bundle[BINK_SRC_BLOCK_TYPES]) < 0)
706
                return -1;
707
            if (read_block_types(c->avctx, gb, &c->bundle[BINK_SRC_SUB_BLOCK_TYPES]) < 0)
708
                return -1;
709
            if (read_colors(gb, &c->bundle[BINK_SRC_COLORS], c) < 0)
710
                return -1;
711
            if (read_patterns(c->avctx, gb, &c->bundle[BINK_SRC_PATTERN]) < 0)
712
                return -1;
713
            if (read_motion_values(c->avctx, gb, &c->bundle[BINK_SRC_X_OFF]) < 0)
714
                return -1;
715
            if (read_motion_values(c->avctx, gb, &c->bundle[BINK_SRC_Y_OFF]) < 0)
716
                return -1;
717
            if (read_dcs(c->avctx, gb, &c->bundle[BINK_SRC_INTRA_DC], DC_START_BITS, 0) < 0)
718
                return -1;
719
            if (read_dcs(c->avctx, gb, &c->bundle[BINK_SRC_INTER_DC], DC_START_BITS, 1) < 0)
720
                return -1;
721
            if (read_runs(c->avctx, gb, &c->bundle[BINK_SRC_RUN]) < 0)
722
                return -1;
723

    
724
            if (by == bh)
725
                break;
726
            dst  = c->pic.data[plane_idx]  + 8*by*stride;
727
            prev = c->last.data[plane_idx] + 8*by*stride;
728
            for (bx = 0; bx < bw; bx++, dst += 8, prev += 8) {
729
                blk = get_value(c, BINK_SRC_BLOCK_TYPES);
730
                // 16x16 block type on odd line means part of the already decoded block, so skip it
731
                if ((by & 1) && blk == SCALED_BLOCK) {
732
                    bx++;
733
                    dst  += 8;
734
                    prev += 8;
735
                    continue;
736
                }
737
                switch (blk) {
738
                case SKIP_BLOCK:
739
                    c->dsp.put_pixels_tab[1][0](dst, prev, stride, 8);
740
                    break;
741
                case SCALED_BLOCK:
742
                    blk = get_value(c, BINK_SRC_SUB_BLOCK_TYPES);
743
                    switch (blk) {
744
                    case RUN_BLOCK:
745
                        scan = bink_patterns[get_bits(gb, 4)];
746
                        i = 0;
747
                        do {
748
                            int run = get_value(c, BINK_SRC_RUN) + 1;
749

    
750
                            i += run;
751
                            if (i > 64) {
752
                                av_log(c->avctx, AV_LOG_ERROR, "Run went out of bounds\n");
753
                                return -1;
754
                            }
755
                            if (get_bits1(gb)) {
756
                                v = get_value(c, BINK_SRC_COLORS);
757
                                for (j = 0; j < run; j++)
758
                                    ublock[*scan++] = v;
759
                            } else {
760
                                for (j = 0; j < run; j++)
761
                                    ublock[*scan++] = get_value(c, BINK_SRC_COLORS);
762
                            }
763
                        } while (i < 63);
764
                        if (i == 63)
765
                            ublock[*scan++] = get_value(c, BINK_SRC_COLORS);
766
                        break;
767
                    case INTRA_BLOCK:
768
                        c->dsp.clear_block(block);
769
                        block[0] = get_value(c, BINK_SRC_INTRA_DC);
770
                        read_dct_coeffs(gb, block, c->scantable.permutated, 1);
771
                        c->dsp.idct(block);
772
                        c->dsp.put_pixels_nonclamped(block, ublock, 8);
773
                        break;
774
                    case FILL_BLOCK:
775
                        v = get_value(c, BINK_SRC_COLORS);
776
                        c->dsp.fill_block_tab[0](dst, v, stride, 16);
777
                        break;
778
                    case PATTERN_BLOCK:
779
                        for (i = 0; i < 2; i++)
780
                            col[i] = get_value(c, BINK_SRC_COLORS);
781
                        for (j = 0; j < 8; j++) {
782
                            v = get_value(c, BINK_SRC_PATTERN);
783
                            for (i = 0; i < 8; i++, v >>= 1)
784
                                ublock[i + j*8] = col[v & 1];
785
                        }
786
                        break;
787
                    case RAW_BLOCK:
788
                        for (j = 0; j < 8; j++)
789
                            for (i = 0; i < 8; i++)
790
                                ublock[i + j*8] = get_value(c, BINK_SRC_COLORS);
791
                        break;
792
                    default:
793
                        av_log(c->avctx, AV_LOG_ERROR, "Incorrect 16x16 block type %d\n", blk);
794
                        return -1;
795
                    }
796
                    if (blk != FILL_BLOCK)
797
                        c->dsp.scale_block(ublock, dst, stride);
798
                    bx++;
799
                    dst  += 8;
800
                    prev += 8;
801
                    break;
802
                case MOTION_BLOCK:
803
                    xoff = get_value(c, BINK_SRC_X_OFF);
804
                    yoff = get_value(c, BINK_SRC_Y_OFF);
805
                    ref = prev + xoff + yoff * stride;
806
                    if (ref < ref_start || ref > ref_end) {
807
                        av_log(c->avctx, AV_LOG_ERROR, "Copy out of bounds @%d, %d\n",
808
                               bx*8 + xoff, by*8 + yoff);
809
                        return -1;
810
                    }
811
                    c->dsp.put_pixels_tab[1][0](dst, ref, stride, 8);
812
                    break;
813
                case RUN_BLOCK:
814
                    scan = bink_patterns[get_bits(gb, 4)];
815
                    i = 0;
816
                    do {
817
                        int run = get_value(c, BINK_SRC_RUN) + 1;
818

    
819
                        i += run;
820
                        if (i > 64) {
821
                            av_log(c->avctx, AV_LOG_ERROR, "Run went out of bounds\n");
822
                            return -1;
823
                        }
824
                        if (get_bits1(gb)) {
825
                            v = get_value(c, BINK_SRC_COLORS);
826
                            for (j = 0; j < run; j++)
827
                                dst[coordmap[*scan++]] = v;
828
                        } else {
829
                            for (j = 0; j < run; j++)
830
                                dst[coordmap[*scan++]] = get_value(c, BINK_SRC_COLORS);
831
                        }
832
                    } while (i < 63);
833
                    if (i == 63)
834
                        dst[coordmap[*scan++]] = get_value(c, BINK_SRC_COLORS);
835
                    break;
836
                case RESIDUE_BLOCK:
837
                    xoff = get_value(c, BINK_SRC_X_OFF);
838
                    yoff = get_value(c, BINK_SRC_Y_OFF);
839
                    ref = prev + xoff + yoff * stride;
840
                    if (ref < ref_start || ref > ref_end) {
841
                        av_log(c->avctx, AV_LOG_ERROR, "Copy out of bounds @%d, %d\n",
842
                               bx*8 + xoff, by*8 + yoff);
843
                        return -1;
844
                    }
845
                    c->dsp.put_pixels_tab[1][0](dst, ref, stride, 8);
846
                    c->dsp.clear_block(block);
847
                    v = get_bits(gb, 7);
848
                    read_residue(gb, block, v);
849
                    c->dsp.add_pixels8(dst, block, stride);
850
                    break;
851
                case INTRA_BLOCK:
852
                    c->dsp.clear_block(block);
853
                    block[0] = get_value(c, BINK_SRC_INTRA_DC);
854
                    read_dct_coeffs(gb, block, c->scantable.permutated, 1);
855
                    c->dsp.idct_put(dst, stride, block);
856
                    break;
857
                case FILL_BLOCK:
858
                    v = get_value(c, BINK_SRC_COLORS);
859
                    c->dsp.fill_block_tab[1](dst, v, stride, 8);
860
                    break;
861
                case INTER_BLOCK:
862
                    xoff = get_value(c, BINK_SRC_X_OFF);
863
                    yoff = get_value(c, BINK_SRC_Y_OFF);
864
                    ref = prev + xoff + yoff * stride;
865
                    c->dsp.put_pixels_tab[1][0](dst, ref, stride, 8);
866
                    c->dsp.clear_block(block);
867
                    block[0] = get_value(c, BINK_SRC_INTER_DC);
868
                    read_dct_coeffs(gb, block, c->scantable.permutated, 0);
869
                    c->dsp.idct_add(dst, stride, block);
870
                    break;
871
                case PATTERN_BLOCK:
872
                    for (i = 0; i < 2; i++)
873
                        col[i] = get_value(c, BINK_SRC_COLORS);
874
                    for (i = 0; i < 8; i++) {
875
                        v = get_value(c, BINK_SRC_PATTERN);
876
                        for (j = 0; j < 8; j++, v >>= 1)
877
                            dst[i*stride + j] = col[v & 1];
878
                    }
879
                    break;
880
                case RAW_BLOCK:
881
                    for (i = 0; i < 8; i++)
882
                        memcpy(dst + i*stride, c->bundle[BINK_SRC_COLORS].cur_ptr + i*8, 8);
883
                    c->bundle[BINK_SRC_COLORS].cur_ptr += 64;
884
                    break;
885
                default:
886
                    av_log(c->avctx, AV_LOG_ERROR, "Unknown block type %d\n", blk);
887
                    return -1;
888
                }
889
            }
890
        }
891
        if (get_bits_count(gb) & 0x1F) //next plane data starts at 32-bit boundary
892
            skip_bits_long(gb, 32 - (get_bits_count(gb) & 0x1F));
893

    
894
    return 0;
895
}
896

    
897
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *pkt)
898
{
899
    BinkContext * const c = avctx->priv_data;
900
    GetBitContext gb;
901
    int plane, plane_idx;
902
    int bits_count = pkt->size << 3;
903

    
904
    if(c->pic.data[0])
905
        avctx->release_buffer(avctx, &c->pic);
906

    
907
    if(avctx->get_buffer(avctx, &c->pic) < 0){
908
        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
909
        return -1;
910
    }
911

    
912
    init_get_bits(&gb, pkt->data, bits_count);
913
    if (c->has_alpha) {
914
        int aplane_bits = get_bits_long(&gb, 32) << 3;
915
        if (aplane_bits <= 32 || (aplane_bits & 0x1F)) {
916
            av_log(avctx, AV_LOG_ERROR, "Incorrect alpha plane size %d\n", aplane_bits);
917
            return -1;
918
        }
919
        skip_bits_long(&gb, aplane_bits - 32);
920
    }
921
    if (c->version >= 'i')
922
        skip_bits_long(&gb, 32);
923

    
924
    for (plane = 0; plane < 3; plane++) {
925
        plane_idx = (!plane || !c->swap_planes) ? plane : (plane ^ 3);
926

    
927
        if (bink_decode_plane(c, &gb, plane_idx, !!plane) < 0)
928
            return -1;
929
        if (get_bits_count(&gb) >= bits_count)
930
            break;
931
    }
932
    emms_c();
933

    
934
    *data_size = sizeof(AVFrame);
935
    *(AVFrame*)data = c->pic;
936

    
937
    FFSWAP(AVFrame, c->pic, c->last);
938

    
939
    /* always report that the buffer was completely consumed */
940
    return pkt->size;
941
}
942

    
943
static av_cold int decode_init(AVCodecContext *avctx)
944
{
945
    BinkContext * const c = avctx->priv_data;
946
    static VLC_TYPE table[16 * 128][2];
947
    int i;
948
    int flags;
949

    
950
    c->version = avctx->codec_tag >> 24;
951
    if (c->version < 'c') {
952
        av_log(avctx, AV_LOG_ERROR, "Too old version '%c'\n", c->version);
953
        return -1;
954
    }
955
    if (avctx->extradata_size < 4) {
956
        av_log(avctx, AV_LOG_ERROR, "Extradata missing or too short\n");
957
        return -1;
958
    }
959
    flags = AV_RL32(avctx->extradata);
960
    c->has_alpha = flags & BINK_FLAG_ALPHA;
961
    c->swap_planes = c->version >= 'i';
962
    if (!bink_trees[15].table) {
963
        for (i = 0; i < 16; i++) {
964
            const int maxbits = bink_tree_lens[i][15];
965
            bink_trees[i].table = table + i*128;
966
            bink_trees[i].table_allocated = 1 << maxbits;
967
            init_vlc(&bink_trees[i], maxbits, 16,
968
                     bink_tree_lens[i], 1, 1,
969
                     bink_tree_bits[i], 1, 1, INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);
970
        }
971
    }
972
    c->avctx = avctx;
973

    
974
    c->pic.data[0] = NULL;
975

    
976
    if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) {
977
        return 1;
978
    }
979

    
980
    avctx->pix_fmt = PIX_FMT_YUV420P;
981

    
982
    avctx->idct_algo = FF_IDCT_BINK;
983
    dsputil_init(&c->dsp, avctx);
984
    ff_init_scantable(c->dsp.idct_permutation, &c->scantable, bink_scan);
985

    
986
    init_bundles(c);
987

    
988
    return 0;
989
}
990

    
991
static av_cold int decode_end(AVCodecContext *avctx)
992
{
993
    BinkContext * const c = avctx->priv_data;
994

    
995
    if (c->pic.data[0])
996
        avctx->release_buffer(avctx, &c->pic);
997
    if (c->last.data[0])
998
        avctx->release_buffer(avctx, &c->last);
999

    
1000
    free_bundles(c);
1001
    return 0;
1002
}
1003

    
1004
AVCodec bink_decoder = {
1005
    "binkvideo",
1006
    CODEC_TYPE_VIDEO,
1007
    CODEC_ID_BINKVIDEO,
1008
    sizeof(BinkContext),
1009
    decode_init,
1010
    NULL,
1011
    decode_end,
1012
    decode_frame,
1013
    .long_name = NULL_IF_CONFIG_SMALL("Bink video"),
1014
};