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1
/*
2
 * Bink video decoder
3
 * Copyright (c) 2009 Konstantin Shishkov
4
 *
5
 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
11
 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20
 */
21

    
22
#include "libavcore/imgutils.h"
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#include "avcodec.h"
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#include "dsputil.h"
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#include "binkdata.h"
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#include "mathops.h"
27

    
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#define ALT_BITSTREAM_READER_LE
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#include "get_bits.h"
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#define BINK_FLAG_ALPHA 0x00100000
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#define BINK_FLAG_GRAY  0x00020000
33

    
34
static VLC bink_trees[16];
35

    
36
/**
37
 * IDs for different data types used in Bink video codec
38
 */
39
enum Sources {
40
    BINK_SRC_BLOCK_TYPES = 0, ///< 8x8 block types
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    BINK_SRC_SUB_BLOCK_TYPES, ///< 16x16 block types (a subset of 8x8 block types)
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    BINK_SRC_COLORS,          ///< pixel values used for different block types
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    BINK_SRC_PATTERN,         ///< 8-bit values for 2-colour pattern fill
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    BINK_SRC_X_OFF,           ///< X components of motion value
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    BINK_SRC_Y_OFF,           ///< Y components of motion value
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    BINK_SRC_INTRA_DC,        ///< DC values for intrablocks with DCT
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    BINK_SRC_INTER_DC,        ///< DC values for interblocks with DCT
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    BINK_SRC_RUN,             ///< run lengths for special fill block
49

    
50
    BINK_NB_SRC
51
};
52

    
53
/**
54
 * data needed to decode 4-bit Huffman-coded value
55
 */
56
typedef struct Tree {
57
    int     vlc_num;  ///< tree number (in bink_trees[])
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    uint8_t syms[16]; ///< leaf value to symbol mapping
59
} Tree;
60

    
61
#define GET_HUFF(gb, tree)  (tree).syms[get_vlc2(gb, bink_trees[(tree).vlc_num].table,\
62
                                                 bink_trees[(tree).vlc_num].bits, 1)]
63

    
64
/**
65
 * data structure used for decoding single Bink data type
66
 */
67
typedef struct Bundle {
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    int     len;       ///< length of number of entries to decode (in bits)
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    Tree    tree;      ///< Huffman tree-related data
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    uint8_t *data;     ///< buffer for decoded symbols
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    uint8_t *data_end; ///< buffer end
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    uint8_t *cur_dec;  ///< pointer to the not yet decoded part of the buffer
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    uint8_t *cur_ptr;  ///< pointer to the data that is not read from buffer yet
74
} Bundle;
75

    
76
/*
77
 * Decoder context
78
 */
79
typedef struct BinkContext {
80
    AVCodecContext *avctx;
81
    DSPContext     dsp;
82
    AVFrame        pic, last;
83
    int            version;              ///< internal Bink file version
84
    int            has_alpha;
85
    int            swap_planes;
86
    ScanTable      scantable;            ///< permutated scantable for DCT coeffs decoding
87

    
88
    Bundle         bundle[BINK_NB_SRC];  ///< bundles for decoding all data types
89
    Tree           col_high[16];         ///< trees for decoding high nibble in "colours" data type
90
    int            col_lastval;          ///< value of last decoded high nibble in "colours" data type
91
} BinkContext;
92

    
93
/**
94
 * Bink video block types
95
 */
96
enum BlockTypes {
97
    SKIP_BLOCK = 0, ///< skipped block
98
    SCALED_BLOCK,   ///< block has size 16x16
99
    MOTION_BLOCK,   ///< block is copied from previous frame with some offset
100
    RUN_BLOCK,      ///< block is composed from runs of colours with custom scan order
101
    RESIDUE_BLOCK,  ///< motion block with some difference added
102
    INTRA_BLOCK,    ///< intra DCT block
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    FILL_BLOCK,     ///< block is filled with single colour
104
    INTER_BLOCK,    ///< motion block with DCT applied to the difference
105
    PATTERN_BLOCK,  ///< block is filled with two colours following custom pattern
106
    RAW_BLOCK,      ///< uncoded 8x8 block
107
};
108

    
109
/**
110
 * Initialize length length in all bundles.
111
 *
112
 * @param c     decoder context
113
 * @param width plane width
114
 * @param bw    plane width in 8x8 blocks
115
 */
116
static void init_lengths(BinkContext *c, int width, int bw)
117
{
118
    c->bundle[BINK_SRC_BLOCK_TYPES].len = av_log2((width >> 3) + 511) + 1;
119

    
120
    c->bundle[BINK_SRC_SUB_BLOCK_TYPES].len = av_log2((width >> 4) + 511) + 1;
121

    
122
    c->bundle[BINK_SRC_COLORS].len = av_log2(bw*64 + 511) + 1;
123

    
124
    c->bundle[BINK_SRC_INTRA_DC].len =
125
    c->bundle[BINK_SRC_INTER_DC].len =
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    c->bundle[BINK_SRC_X_OFF].len =
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    c->bundle[BINK_SRC_Y_OFF].len = av_log2((width >> 3) + 511) + 1;
128

    
129
    c->bundle[BINK_SRC_PATTERN].len = av_log2((bw << 3) + 511) + 1;
130

    
131
    c->bundle[BINK_SRC_RUN].len = av_log2(bw*48 + 511) + 1;
132
}
133

    
134
/**
135
 * Allocate memory for bundles.
136
 *
137
 * @param c decoder context
138
 */
139
static av_cold void init_bundles(BinkContext *c)
140
{
141
    int bw, bh, blocks;
142
    int i;
143

    
144
    bw = (c->avctx->width  + 7) >> 3;
145
    bh = (c->avctx->height + 7) >> 3;
146
    blocks = bw * bh;
147

    
148
    for (i = 0; i < BINK_NB_SRC; i++) {
149
        c->bundle[i].data = av_malloc(blocks * 64);
150
        c->bundle[i].data_end = c->bundle[i].data + blocks * 64;
151
    }
152
}
153

    
154
/**
155
 * Free memory used by bundles.
156
 *
157
 * @param c decoder context
158
 */
159
static av_cold void free_bundles(BinkContext *c)
160
{
161
    int i;
162
    for (i = 0; i < BINK_NB_SRC; i++)
163
        av_freep(&c->bundle[i].data);
164
}
165

    
166
/**
167
 * Merge two consequent lists of equal size depending on bits read.
168
 *
169
 * @param gb   context for reading bits
170
 * @param dst  buffer where merged list will be written to
171
 * @param src  pointer to the head of the first list (the second lists starts at src+size)
172
 * @param size input lists size
173
 */
174
static void merge(GetBitContext *gb, uint8_t *dst, uint8_t *src, int size)
175
{
176
    uint8_t *src2 = src + size;
177
    int size2 = size;
178

    
179
    do {
180
        if (!get_bits1(gb)) {
181
            *dst++ = *src++;
182
            size--;
183
        } else {
184
            *dst++ = *src2++;
185
            size2--;
186
        }
187
    } while (size && size2);
188

    
189
    while (size--)
190
        *dst++ = *src++;
191
    while (size2--)
192
        *dst++ = *src2++;
193
}
194

    
195
/**
196
 * Read information about Huffman tree used to decode data.
197
 *
198
 * @param gb   context for reading bits
199
 * @param tree pointer for storing tree data
200
 */
201
static void read_tree(GetBitContext *gb, Tree *tree)
202
{
203
    uint8_t tmp1[16], tmp2[16], *in = tmp1, *out = tmp2;
204
    int i, t, len;
205

    
206
    tree->vlc_num = get_bits(gb, 4);
207
    if (!tree->vlc_num) {
208
        for (i = 0; i < 16; i++)
209
            tree->syms[i] = i;
210
        return;
211
    }
212
    if (get_bits1(gb)) {
213
        len = get_bits(gb, 3);
214
        memset(tmp1, 0, sizeof(tmp1));
215
        for (i = 0; i <= len; i++) {
216
            tree->syms[i] = get_bits(gb, 4);
217
            tmp1[tree->syms[i]] = 1;
218
        }
219
        for (i = 0; i < 16; i++)
220
            if (!tmp1[i])
221
                tree->syms[++len] = i;
222
    } else {
223
        len = get_bits(gb, 2);
224
        for (i = 0; i < 16; i++)
225
            in[i] = i;
226
        for (i = 0; i <= len; i++) {
227
            int size = 1 << i;
228
            for (t = 0; t < 16; t += size << 1)
229
                merge(gb, out + t, in + t, size);
230
            FFSWAP(uint8_t*, in, out);
231
        }
232
        memcpy(tree->syms, in, 16);
233
    }
234
}
235

    
236
/**
237
 * Prepare bundle for decoding data.
238
 *
239
 * @param gb          context for reading bits
240
 * @param c           decoder context
241
 * @param bundle_num  number of the bundle to initialize
242
 */
243
static void read_bundle(GetBitContext *gb, BinkContext *c, int bundle_num)
244
{
245
    int i;
246

    
247
    if (bundle_num == BINK_SRC_COLORS) {
248
        for (i = 0; i < 16; i++)
249
            read_tree(gb, &c->col_high[i]);
250
        c->col_lastval = 0;
251
    }
252
    if (bundle_num != BINK_SRC_INTRA_DC && bundle_num != BINK_SRC_INTER_DC)
253
        read_tree(gb, &c->bundle[bundle_num].tree);
254
    c->bundle[bundle_num].cur_dec =
255
    c->bundle[bundle_num].cur_ptr = c->bundle[bundle_num].data;
256
}
257

    
258
/**
259
 * common check before starting decoding bundle data
260
 *
261
 * @param gb context for reading bits
262
 * @param b  bundle
263
 * @param t  variable where number of elements to decode will be stored
264
 */
265
#define CHECK_READ_VAL(gb, b, t) \
266
    if (!b->cur_dec || (b->cur_dec > b->cur_ptr)) \
267
        return 0; \
268
    t = get_bits(gb, b->len); \
269
    if (!t) { \
270
        b->cur_dec = NULL; \
271
        return 0; \
272
    } \
273

    
274
static int read_runs(AVCodecContext *avctx, GetBitContext *gb, Bundle *b)
275
{
276
    int t, v;
277
    const uint8_t *dec_end;
278

    
279
    CHECK_READ_VAL(gb, b, t);
280
    dec_end = b->cur_dec + t;
281
    if (dec_end > b->data_end) {
282
        av_log(avctx, AV_LOG_ERROR, "Run value went out of bounds\n");
283
        return -1;
284
    }
285
    if (get_bits1(gb)) {
286
        v = get_bits(gb, 4);
287
        memset(b->cur_dec, v, t);
288
        b->cur_dec += t;
289
    } else {
290
        while (b->cur_dec < dec_end)
291
            *b->cur_dec++ = GET_HUFF(gb, b->tree);
292
    }
293
    return 0;
294
}
295

    
296
static int read_motion_values(AVCodecContext *avctx, GetBitContext *gb, Bundle *b)
297
{
298
    int t, sign, v;
299
    const uint8_t *dec_end;
300

    
301
    CHECK_READ_VAL(gb, b, t);
302
    dec_end = b->cur_dec + t;
303
    if (dec_end > b->data_end) {
304
        av_log(avctx, AV_LOG_ERROR, "Too many motion values\n");
305
        return -1;
306
    }
307
    if (get_bits1(gb)) {
308
        v = get_bits(gb, 4);
309
        if (v) {
310
            sign = -get_bits1(gb);
311
            v = (v ^ sign) - sign;
312
        }
313
        memset(b->cur_dec, v, t);
314
        b->cur_dec += t;
315
    } else {
316
        do {
317
            v = GET_HUFF(gb, b->tree);
318
            if (v) {
319
                sign = -get_bits1(gb);
320
                v = (v ^ sign) - sign;
321
            }
322
            *b->cur_dec++ = v;
323
        } while (b->cur_dec < dec_end);
324
    }
325
    return 0;
326
}
327

    
328
static const uint8_t bink_rlelens[4] = { 4, 8, 12, 32 };
329

    
330
static int read_block_types(AVCodecContext *avctx, GetBitContext *gb, Bundle *b)
331
{
332
    int t, v;
333
    int last = 0;
334
    const uint8_t *dec_end;
335

    
336
    CHECK_READ_VAL(gb, b, t);
337
    dec_end = b->cur_dec + t;
338
    if (dec_end > b->data_end) {
339
        av_log(avctx, AV_LOG_ERROR, "Too many block type values\n");
340
        return -1;
341
    }
342
    if (get_bits1(gb)) {
343
        v = get_bits(gb, 4);
344
        memset(b->cur_dec, v, t);
345
        b->cur_dec += t;
346
    } else {
347
        do {
348
            v = GET_HUFF(gb, b->tree);
349
            if (v < 12) {
350
                last = v;
351
                *b->cur_dec++ = v;
352
            } else {
353
                int run = bink_rlelens[v - 12];
354

    
355
                memset(b->cur_dec, last, run);
356
                b->cur_dec += run;
357
            }
358
        } while (b->cur_dec < dec_end);
359
    }
360
    return 0;
361
}
362

    
363
static int read_patterns(AVCodecContext *avctx, GetBitContext *gb, Bundle *b)
364
{
365
    int t, v;
366
    const uint8_t *dec_end;
367

    
368
    CHECK_READ_VAL(gb, b, t);
369
    dec_end = b->cur_dec + t;
370
    if (dec_end > b->data_end) {
371
        av_log(avctx, AV_LOG_ERROR, "Too many pattern values\n");
372
        return -1;
373
    }
374
    while (b->cur_dec < dec_end) {
375
        v  = GET_HUFF(gb, b->tree);
376
        v |= GET_HUFF(gb, b->tree) << 4;
377
        *b->cur_dec++ = v;
378
    }
379

    
380
    return 0;
381
}
382

    
383
static int read_colors(GetBitContext *gb, Bundle *b, BinkContext *c)
384
{
385
    int t, sign, v;
386
    const uint8_t *dec_end;
387

    
388
    CHECK_READ_VAL(gb, b, t);
389
    dec_end = b->cur_dec + t;
390
    if (dec_end > b->data_end) {
391
        av_log(c->avctx, AV_LOG_ERROR, "Too many color values\n");
392
        return -1;
393
    }
394
    if (get_bits1(gb)) {
395
        c->col_lastval = GET_HUFF(gb, c->col_high[c->col_lastval]);
396
        v = GET_HUFF(gb, b->tree);
397
        v = (c->col_lastval << 4) | v;
398
        if (c->version < 'i') {
399
            sign = ((int8_t) v) >> 7;
400
            v = ((v & 0x7F) ^ sign) - sign;
401
            v += 0x80;
402
        }
403
        memset(b->cur_dec, v, t);
404
        b->cur_dec += t;
405
    } else {
406
        while (b->cur_dec < dec_end) {
407
            c->col_lastval = GET_HUFF(gb, c->col_high[c->col_lastval]);
408
            v = GET_HUFF(gb, b->tree);
409
            v = (c->col_lastval << 4) | v;
410
            if (c->version < 'i') {
411
                sign = ((int8_t) v) >> 7;
412
                v = ((v & 0x7F) ^ sign) - sign;
413
                v += 0x80;
414
            }
415
            *b->cur_dec++ = v;
416
        }
417
    }
418
    return 0;
419
}
420

    
421
/** number of bits used to store first DC value in bundle */
422
#define DC_START_BITS 11
423

    
424
static int read_dcs(AVCodecContext *avctx, GetBitContext *gb, Bundle *b,
425
                    int start_bits, int has_sign)
426
{
427
    int i, j, len, len2, bsize, sign, v, v2;
428
    int16_t *dst = (int16_t*)b->cur_dec;
429

    
430
    CHECK_READ_VAL(gb, b, len);
431
    v = get_bits(gb, start_bits - has_sign);
432
    if (v && has_sign) {
433
        sign = -get_bits1(gb);
434
        v = (v ^ sign) - sign;
435
    }
436
    *dst++ = v;
437
    len--;
438
    for (i = 0; i < len; i += 8) {
439
        len2 = FFMIN(len - i, 8);
440
        bsize = get_bits(gb, 4);
441
        if (bsize) {
442
            for (j = 0; j < len2; j++) {
443
                v2 = get_bits(gb, bsize);
444
                if (v2) {
445
                    sign = -get_bits1(gb);
446
                    v2 = (v2 ^ sign) - sign;
447
                }
448
                v += v2;
449
                *dst++ = v;
450
                if (v < -32768 || v > 32767) {
451
                    av_log(avctx, AV_LOG_ERROR, "DC value went out of bounds: %d\n", v);
452
                    return -1;
453
                }
454
            }
455
        } else {
456
            for (j = 0; j < len2; j++)
457
                *dst++ = v;
458
        }
459
    }
460

    
461
    b->cur_dec = (uint8_t*)dst;
462
    return 0;
463
}
464

    
465
/**
466
 * Retrieve next value from bundle.
467
 *
468
 * @param c      decoder context
469
 * @param bundle bundle number
470
 */
471
static inline int get_value(BinkContext *c, int bundle)
472
{
473
    int16_t ret;
474

    
475
    if (bundle < BINK_SRC_X_OFF || bundle == BINK_SRC_RUN)
476
        return *c->bundle[bundle].cur_ptr++;
477
    if (bundle == BINK_SRC_X_OFF || bundle == BINK_SRC_Y_OFF)
478
        return (int8_t)*c->bundle[bundle].cur_ptr++;
479
    ret = *(int16_t*)c->bundle[bundle].cur_ptr;
480
    c->bundle[bundle].cur_ptr += 2;
481
    return ret;
482
}
483

    
484
/**
485
 * Read 8x8 block of DCT coefficients.
486
 *
487
 * @param gb       context for reading bits
488
 * @param block    place for storing coefficients
489
 * @param scan     scan order table
490
 * @param is_intra tells what set of quantizer matrices to use
491
 * @return 0 for success, negative value in other cases
492
 */
493
static int read_dct_coeffs(GetBitContext *gb, DCTELEM block[64], const uint8_t *scan,
494
                           int is_intra)
495
{
496
    int coef_list[128];
497
    int mode_list[128];
498
    int i, t, mask, bits, ccoef, mode, sign;
499
    int list_start = 64, list_end = 64, list_pos;
500
    int coef_count = 0;
501
    int coef_idx[64];
502
    int quant_idx;
503
    const uint32_t *quant;
504

    
505
    coef_list[list_end] = 4;  mode_list[list_end++] = 0;
506
    coef_list[list_end] = 24; mode_list[list_end++] = 0;
507
    coef_list[list_end] = 44; mode_list[list_end++] = 0;
508
    coef_list[list_end] = 1;  mode_list[list_end++] = 3;
509
    coef_list[list_end] = 2;  mode_list[list_end++] = 3;
510
    coef_list[list_end] = 3;  mode_list[list_end++] = 3;
511

    
512
    bits = get_bits(gb, 4) - 1;
513
    for (mask = 1 << bits; bits >= 0; mask >>= 1, bits--) {
514
        list_pos = list_start;
515
        while (list_pos < list_end) {
516
            if (!(mode_list[list_pos] | coef_list[list_pos]) || !get_bits1(gb)) {
517
                list_pos++;
518
                continue;
519
            }
520
            ccoef = coef_list[list_pos];
521
            mode  = mode_list[list_pos];
522
            switch (mode) {
523
            case 0:
524
                coef_list[list_pos] = ccoef + 4;
525
                mode_list[list_pos] = 1;
526
            case 2:
527
                if (mode == 2) {
528
                    coef_list[list_pos]   = 0;
529
                    mode_list[list_pos++] = 0;
530
                }
531
                for (i = 0; i < 4; i++, ccoef++) {
532
                    if (get_bits1(gb)) {
533
                        coef_list[--list_start] = ccoef;
534
                        mode_list[  list_start] = 3;
535
                    } else {
536
                        int t;
537
                        if (!bits) {
538
                            t = 1 - (get_bits1(gb) << 1);
539
                        } else {
540
                            t = get_bits(gb, bits) | mask;
541
                            sign = -get_bits1(gb);
542
                            t = (t ^ sign) - sign;
543
                        }
544
                        block[scan[ccoef]] = t;
545
                        coef_idx[coef_count++] = ccoef;
546
                    }
547
                }
548
                break;
549
            case 1:
550
                mode_list[list_pos] = 2;
551
                for (i = 0; i < 3; i++) {
552
                    ccoef += 4;
553
                    coef_list[list_end]   = ccoef;
554
                    mode_list[list_end++] = 2;
555
                }
556
                break;
557
            case 3:
558
                if (!bits) {
559
                    t = 1 - (get_bits1(gb) << 1);
560
                } else {
561
                    t = get_bits(gb, bits) | mask;
562
                    sign = -get_bits1(gb);
563
                    t = (t ^ sign) - sign;
564
                }
565
                block[scan[ccoef]] = t;
566
                coef_idx[coef_count++] = ccoef;
567
                coef_list[list_pos]   = 0;
568
                mode_list[list_pos++] = 0;
569
                break;
570
            }
571
        }
572
    }
573

    
574
    quant_idx = get_bits(gb, 4);
575
    quant = is_intra ? bink_intra_quant[quant_idx]
576
                     : bink_inter_quant[quant_idx];
577
    block[0] = (block[0] * quant[0]) >> 11;
578
    for (i = 0; i < coef_count; i++) {
579
        int idx = coef_idx[i];
580
        block[scan[idx]] = (block[scan[idx]] * quant[idx]) >> 11;
581
    }
582

    
583
    return 0;
584
}
585

    
586
/**
587
 * Read 8x8 block with residue after motion compensation.
588
 *
589
 * @param gb          context for reading bits
590
 * @param block       place to store read data
591
 * @param masks_count number of masks to decode
592
 * @return 0 on success, negative value in other cases
593
 */
594
static int read_residue(GetBitContext *gb, DCTELEM block[64], int masks_count)
595
{
596
    int coef_list[128];
597
    int mode_list[128];
598
    int i, sign, mask, ccoef, mode;
599
    int list_start = 64, list_end = 64, list_pos;
600
    int nz_coeff[64];
601
    int nz_coeff_count = 0;
602

    
603
    coef_list[list_end] =  4; mode_list[list_end++] = 0;
604
    coef_list[list_end] = 24; mode_list[list_end++] = 0;
605
    coef_list[list_end] = 44; mode_list[list_end++] = 0;
606
    coef_list[list_end] =  0; mode_list[list_end++] = 2;
607

    
608
    for (mask = 1 << get_bits(gb, 3); mask; mask >>= 1) {
609
        for (i = 0; i < nz_coeff_count; i++) {
610
            if (!get_bits1(gb))
611
                continue;
612
            if (block[nz_coeff[i]] < 0)
613
                block[nz_coeff[i]] -= mask;
614
            else
615
                block[nz_coeff[i]] += mask;
616
            masks_count--;
617
            if (masks_count < 0)
618
                return 0;
619
        }
620
        list_pos = list_start;
621
        while (list_pos < list_end) {
622
            if (!(coef_list[list_pos] | mode_list[list_pos]) || !get_bits1(gb)) {
623
                list_pos++;
624
                continue;
625
            }
626
            ccoef = coef_list[list_pos];
627
            mode  = mode_list[list_pos];
628
            switch (mode) {
629
            case 0:
630
                coef_list[list_pos] = ccoef + 4;
631
                mode_list[list_pos] = 1;
632
            case 2:
633
                if (mode == 2) {
634
                    coef_list[list_pos]   = 0;
635
                    mode_list[list_pos++] = 0;
636
                }
637
                for (i = 0; i < 4; i++, ccoef++) {
638
                    if (get_bits1(gb)) {
639
                        coef_list[--list_start] = ccoef;
640
                        mode_list[  list_start] = 3;
641
                    } else {
642
                        nz_coeff[nz_coeff_count++] = bink_scan[ccoef];
643
                        sign = -get_bits1(gb);
644
                        block[bink_scan[ccoef]] = (mask ^ sign) - sign;
645
                        masks_count--;
646
                        if (masks_count < 0)
647
                            return 0;
648
                    }
649
                }
650
                break;
651
            case 1:
652
                mode_list[list_pos] = 2;
653
                for (i = 0; i < 3; i++) {
654
                    ccoef += 4;
655
                    coef_list[list_end]   = ccoef;
656
                    mode_list[list_end++] = 2;
657
                }
658
                break;
659
            case 3:
660
                nz_coeff[nz_coeff_count++] = bink_scan[ccoef];
661
                sign = -get_bits1(gb);
662
                block[bink_scan[ccoef]] = (mask ^ sign) - sign;
663
                coef_list[list_pos]   = 0;
664
                mode_list[list_pos++] = 0;
665
                masks_count--;
666
                if (masks_count < 0)
667
                    return 0;
668
                break;
669
            }
670
        }
671
    }
672

    
673
    return 0;
674
}
675

    
676
static int bink_decode_plane(BinkContext *c, GetBitContext *gb, int plane_idx,
677
                             int is_chroma)
678
{
679
    int blk;
680
    int i, j, bx, by;
681
    uint8_t *dst, *prev, *ref, *ref_start, *ref_end;
682
    int v, col[2];
683
    const uint8_t *scan;
684
    int xoff, yoff;
685
    LOCAL_ALIGNED_16(DCTELEM, block, [64]);
686
    LOCAL_ALIGNED_16(uint8_t, ublock, [64]);
687
    int coordmap[64];
688

    
689
    const int stride = c->pic.linesize[plane_idx];
690
    int bw = is_chroma ? (c->avctx->width  + 15) >> 4 : (c->avctx->width  + 7) >> 3;
691
    int bh = is_chroma ? (c->avctx->height + 15) >> 4 : (c->avctx->height + 7) >> 3;
692
    int width = c->avctx->width >> is_chroma;
693

    
694
    init_lengths(c, FFMAX(width, 8), bw);
695
    for (i = 0; i < BINK_NB_SRC; i++)
696
        read_bundle(gb, c, i);
697

    
698
    ref_start = c->last.data[plane_idx];
699
    ref_end   = c->last.data[plane_idx]
700
                + (bw - 1 + c->last.linesize[plane_idx] * (bh - 1)) * 8;
701

    
702
    for (i = 0; i < 64; i++)
703
        coordmap[i] = (i & 7) + (i >> 3) * stride;
704

    
705
    for (by = 0; by < bh; by++) {
706
        if (read_block_types(c->avctx, gb, &c->bundle[BINK_SRC_BLOCK_TYPES]) < 0)
707
            return -1;
708
        if (read_block_types(c->avctx, gb, &c->bundle[BINK_SRC_SUB_BLOCK_TYPES]) < 0)
709
            return -1;
710
        if (read_colors(gb, &c->bundle[BINK_SRC_COLORS], c) < 0)
711
            return -1;
712
        if (read_patterns(c->avctx, gb, &c->bundle[BINK_SRC_PATTERN]) < 0)
713
            return -1;
714
        if (read_motion_values(c->avctx, gb, &c->bundle[BINK_SRC_X_OFF]) < 0)
715
            return -1;
716
        if (read_motion_values(c->avctx, gb, &c->bundle[BINK_SRC_Y_OFF]) < 0)
717
            return -1;
718
        if (read_dcs(c->avctx, gb, &c->bundle[BINK_SRC_INTRA_DC], DC_START_BITS, 0) < 0)
719
            return -1;
720
        if (read_dcs(c->avctx, gb, &c->bundle[BINK_SRC_INTER_DC], DC_START_BITS, 1) < 0)
721
            return -1;
722
        if (read_runs(c->avctx, gb, &c->bundle[BINK_SRC_RUN]) < 0)
723
            return -1;
724

    
725
        if (by == bh)
726
            break;
727
        dst  = c->pic.data[plane_idx]  + 8*by*stride;
728
        prev = c->last.data[plane_idx] + 8*by*stride;
729
        for (bx = 0; bx < bw; bx++, dst += 8, prev += 8) {
730
            blk = get_value(c, BINK_SRC_BLOCK_TYPES);
731
            // 16x16 block type on odd line means part of the already decoded block, so skip it
732
            if ((by & 1) && blk == SCALED_BLOCK) {
733
                bx++;
734
                dst  += 8;
735
                prev += 8;
736
                continue;
737
            }
738
            switch (blk) {
739
            case SKIP_BLOCK:
740
                c->dsp.put_pixels_tab[1][0](dst, prev, stride, 8);
741
                break;
742
            case SCALED_BLOCK:
743
                blk = get_value(c, BINK_SRC_SUB_BLOCK_TYPES);
744
                switch (blk) {
745
                case RUN_BLOCK:
746
                    scan = bink_patterns[get_bits(gb, 4)];
747
                    i = 0;
748
                    do {
749
                        int run = get_value(c, BINK_SRC_RUN) + 1;
750

    
751
                        i += run;
752
                        if (i > 64) {
753
                            av_log(c->avctx, AV_LOG_ERROR, "Run went out of bounds\n");
754
                            return -1;
755
                        }
756
                        if (get_bits1(gb)) {
757
                            v = get_value(c, BINK_SRC_COLORS);
758
                            for (j = 0; j < run; j++)
759
                                ublock[*scan++] = v;
760
                        } else {
761
                            for (j = 0; j < run; j++)
762
                                ublock[*scan++] = get_value(c, BINK_SRC_COLORS);
763
                        }
764
                    } while (i < 63);
765
                    if (i == 63)
766
                        ublock[*scan++] = get_value(c, BINK_SRC_COLORS);
767
                    break;
768
                case INTRA_BLOCK:
769
                    c->dsp.clear_block(block);
770
                    block[0] = get_value(c, BINK_SRC_INTRA_DC);
771
                    read_dct_coeffs(gb, block, c->scantable.permutated, 1);
772
                    c->dsp.idct(block);
773
                    c->dsp.put_pixels_nonclamped(block, ublock, 8);
774
                    break;
775
                case FILL_BLOCK:
776
                    v = get_value(c, BINK_SRC_COLORS);
777
                    c->dsp.fill_block_tab[0](dst, v, stride, 16);
778
                    break;
779
                case PATTERN_BLOCK:
780
                    for (i = 0; i < 2; i++)
781
                        col[i] = get_value(c, BINK_SRC_COLORS);
782
                    for (j = 0; j < 8; j++) {
783
                        v = get_value(c, BINK_SRC_PATTERN);
784
                        for (i = 0; i < 8; i++, v >>= 1)
785
                            ublock[i + j*8] = col[v & 1];
786
                    }
787
                    break;
788
                case RAW_BLOCK:
789
                    for (j = 0; j < 8; j++)
790
                        for (i = 0; i < 8; i++)
791
                            ublock[i + j*8] = get_value(c, BINK_SRC_COLORS);
792
                    break;
793
                default:
794
                    av_log(c->avctx, AV_LOG_ERROR, "Incorrect 16x16 block type %d\n", blk);
795
                    return -1;
796
                }
797
                if (blk != FILL_BLOCK)
798
                c->dsp.scale_block(ublock, dst, stride);
799
                bx++;
800
                dst  += 8;
801
                prev += 8;
802
                break;
803
            case MOTION_BLOCK:
804
                xoff = get_value(c, BINK_SRC_X_OFF);
805
                yoff = get_value(c, BINK_SRC_Y_OFF);
806
                ref = prev + xoff + yoff * stride;
807
                if (ref < ref_start || ref > ref_end) {
808
                    av_log(c->avctx, AV_LOG_ERROR, "Copy out of bounds @%d, %d\n",
809
                           bx*8 + xoff, by*8 + yoff);
810
                    return -1;
811
                }
812
                c->dsp.put_pixels_tab[1][0](dst, ref, stride, 8);
813
                break;
814
            case RUN_BLOCK:
815
                scan = bink_patterns[get_bits(gb, 4)];
816
                i = 0;
817
                do {
818
                    int run = get_value(c, BINK_SRC_RUN) + 1;
819

    
820
                    i += run;
821
                    if (i > 64) {
822
                        av_log(c->avctx, AV_LOG_ERROR, "Run went out of bounds\n");
823
                        return -1;
824
                    }
825
                    if (get_bits1(gb)) {
826
                        v = get_value(c, BINK_SRC_COLORS);
827
                        for (j = 0; j < run; j++)
828
                            dst[coordmap[*scan++]] = v;
829
                    } else {
830
                        for (j = 0; j < run; j++)
831
                            dst[coordmap[*scan++]] = get_value(c, BINK_SRC_COLORS);
832
                    }
833
                } while (i < 63);
834
                if (i == 63)
835
                    dst[coordmap[*scan++]] = get_value(c, BINK_SRC_COLORS);
836
                break;
837
            case RESIDUE_BLOCK:
838
                xoff = get_value(c, BINK_SRC_X_OFF);
839
                yoff = get_value(c, BINK_SRC_Y_OFF);
840
                ref = prev + xoff + yoff * stride;
841
                if (ref < ref_start || ref > ref_end) {
842
                    av_log(c->avctx, AV_LOG_ERROR, "Copy out of bounds @%d, %d\n",
843
                           bx*8 + xoff, by*8 + yoff);
844
                    return -1;
845
                }
846
                c->dsp.put_pixels_tab[1][0](dst, ref, stride, 8);
847
                c->dsp.clear_block(block);
848
                v = get_bits(gb, 7);
849
                read_residue(gb, block, v);
850
                c->dsp.add_pixels8(dst, block, stride);
851
                break;
852
            case INTRA_BLOCK:
853
                c->dsp.clear_block(block);
854
                block[0] = get_value(c, BINK_SRC_INTRA_DC);
855
                read_dct_coeffs(gb, block, c->scantable.permutated, 1);
856
                c->dsp.idct_put(dst, stride, block);
857
                break;
858
            case FILL_BLOCK:
859
                v = get_value(c, BINK_SRC_COLORS);
860
                c->dsp.fill_block_tab[1](dst, v, stride, 8);
861
                break;
862
            case INTER_BLOCK:
863
                xoff = get_value(c, BINK_SRC_X_OFF);
864
                yoff = get_value(c, BINK_SRC_Y_OFF);
865
                ref = prev + xoff + yoff * stride;
866
                c->dsp.put_pixels_tab[1][0](dst, ref, stride, 8);
867
                c->dsp.clear_block(block);
868
                block[0] = get_value(c, BINK_SRC_INTER_DC);
869
                read_dct_coeffs(gb, block, c->scantable.permutated, 0);
870
                c->dsp.idct_add(dst, stride, block);
871
                break;
872
            case PATTERN_BLOCK:
873
                for (i = 0; i < 2; i++)
874
                    col[i] = get_value(c, BINK_SRC_COLORS);
875
                for (i = 0; i < 8; i++) {
876
                    v = get_value(c, BINK_SRC_PATTERN);
877
                    for (j = 0; j < 8; j++, v >>= 1)
878
                        dst[i*stride + j] = col[v & 1];
879
                }
880
                break;
881
            case RAW_BLOCK:
882
                for (i = 0; i < 8; i++)
883
                    memcpy(dst + i*stride, c->bundle[BINK_SRC_COLORS].cur_ptr + i*8, 8);
884
                c->bundle[BINK_SRC_COLORS].cur_ptr += 64;
885
                break;
886
            default:
887
                av_log(c->avctx, AV_LOG_ERROR, "Unknown block type %d\n", blk);
888
                return -1;
889
            }
890
        }
891
    }
892
    if (get_bits_count(gb) & 0x1F) //next plane data starts at 32-bit boundary
893
        skip_bits_long(gb, 32 - (get_bits_count(gb) & 0x1F));
894

    
895
    return 0;
896
}
897

    
898
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *pkt)
899
{
900
    BinkContext * const c = avctx->priv_data;
901
    GetBitContext gb;
902
    int plane, plane_idx;
903
    int bits_count = pkt->size << 3;
904

    
905
    if(c->pic.data[0])
906
        avctx->release_buffer(avctx, &c->pic);
907

    
908
    if(avctx->get_buffer(avctx, &c->pic) < 0){
909
        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
910
        return -1;
911
    }
912

    
913
    init_get_bits(&gb, pkt->data, bits_count);
914
    if (c->has_alpha) {
915
        if (c->version >= 'i')
916
            skip_bits_long(&gb, 32);
917
        if (bink_decode_plane(c, &gb, 3, 0) < 0)
918
            return -1;
919
    }
920
    if (c->version >= 'i')
921
        skip_bits_long(&gb, 32);
922

    
923
    for (plane = 0; plane < 3; plane++) {
924
        plane_idx = (!plane || !c->swap_planes) ? plane : (plane ^ 3);
925

    
926
        if (bink_decode_plane(c, &gb, plane_idx, !!plane) < 0)
927
            return -1;
928
        if (get_bits_count(&gb) >= bits_count)
929
            break;
930
    }
931
    emms_c();
932

    
933
    *data_size = sizeof(AVFrame);
934
    *(AVFrame*)data = c->pic;
935

    
936
    FFSWAP(AVFrame, c->pic, c->last);
937

    
938
    /* always report that the buffer was completely consumed */
939
    return pkt->size;
940
}
941

    
942
static av_cold int decode_init(AVCodecContext *avctx)
943
{
944
    BinkContext * const c = avctx->priv_data;
945
    static VLC_TYPE table[16 * 128][2];
946
    int i;
947
    int flags;
948

    
949
    c->version = avctx->codec_tag >> 24;
950
    if (c->version < 'c') {
951
        av_log(avctx, AV_LOG_ERROR, "Too old version '%c'\n", c->version);
952
        return -1;
953
    }
954
    if (avctx->extradata_size < 4) {
955
        av_log(avctx, AV_LOG_ERROR, "Extradata missing or too short\n");
956
        return -1;
957
    }
958
    flags = AV_RL32(avctx->extradata);
959
    c->has_alpha = flags & BINK_FLAG_ALPHA;
960
    c->swap_planes = c->version >= 'h';
961
    if (!bink_trees[15].table) {
962
        for (i = 0; i < 16; i++) {
963
            const int maxbits = bink_tree_lens[i][15];
964
            bink_trees[i].table = table + i*128;
965
            bink_trees[i].table_allocated = 1 << maxbits;
966
            init_vlc(&bink_trees[i], maxbits, 16,
967
                     bink_tree_lens[i], 1, 1,
968
                     bink_tree_bits[i], 1, 1, INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);
969
        }
970
    }
971
    c->avctx = avctx;
972

    
973
    c->pic.data[0] = NULL;
974

    
975
    if (av_image_check_size(avctx->width, avctx->height, 0, avctx) < 0) {
976
        return 1;
977
    }
978

    
979
    avctx->pix_fmt = c->has_alpha ? PIX_FMT_YUVA420P : PIX_FMT_YUV420P;
980

    
981
    avctx->idct_algo = FF_IDCT_BINK;
982
    dsputil_init(&c->dsp, avctx);
983
    ff_init_scantable(c->dsp.idct_permutation, &c->scantable, bink_scan);
984

    
985
    init_bundles(c);
986

    
987
    return 0;
988
}
989

    
990
static av_cold int decode_end(AVCodecContext *avctx)
991
{
992
    BinkContext * const c = avctx->priv_data;
993

    
994
    if (c->pic.data[0])
995
        avctx->release_buffer(avctx, &c->pic);
996
    if (c->last.data[0])
997
        avctx->release_buffer(avctx, &c->last);
998

    
999
    free_bundles(c);
1000
    return 0;
1001
}
1002

    
1003
AVCodec ff_bink_decoder = {
1004
    "binkvideo",
1005
    AVMEDIA_TYPE_VIDEO,
1006
    CODEC_ID_BINKVIDEO,
1007
    sizeof(BinkContext),
1008
    decode_init,
1009
    NULL,
1010
    decode_end,
1011
    decode_frame,
1012
    .long_name = NULL_IF_CONFIG_SMALL("Bink video"),
1013
};