GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/scpr.c Lines: 0 418 0.0 %
Date: 2020-08-13 15:06:06 Branches: 0 259 0.0 %

Line Branch Exec Source
1
/*
2
 * ScreenPressor decoder
3
 *
4
 * Copyright (c) 2017 Paul B Mahol
5
 *
6
 * This file is part of FFmpeg.
7
 *
8
 * FFmpeg is free software; you can redistribute it and/or
9
 * modify it under the terms of the GNU Lesser General Public
10
 * License as published by the Free Software Foundation; either
11
 * version 2.1 of the License, or (at your option) any later version.
12
 *
13
 * FFmpeg is distributed in the hope that it will be useful,
14
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16
 * Lesser General Public License for more details.
17
 *
18
 * You should have received a copy of the GNU Lesser General Public
19
 * License along with FFmpeg; if not, write to the Free Software
20
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21
 */
22
23
#include <stdio.h>
24
#include <stdlib.h>
25
#include <string.h>
26
27
#include "avcodec.h"
28
#include "bytestream.h"
29
#include "internal.h"
30
#include "scpr.h"
31
#include "scpr3.h"
32
33
#define TOP  0x01000000
34
#define BOT    0x010000
35
36
#include "scpr3.c"
37
38
static void init_rangecoder(RangeCoder *rc, GetByteContext *gb)
39
{
40
    rc->code1 = 0;
41
    rc->range = 0xFFFFFFFFU;
42
    rc->code  = bytestream2_get_be32(gb);
43
}
44
45
static void reinit_tables(SCPRContext *s)
46
{
47
    int comp, i, j;
48
49
    for (comp = 0; comp < 3; comp++) {
50
        for (j = 0; j < 4096; j++) {
51
            if (s->pixel_model[comp][j].total_freq != 256) {
52
                for (i = 0; i < 256; i++)
53
                    s->pixel_model[comp][j].freq[i] = 1;
54
                for (i = 0; i < 16; i++)
55
                    s->pixel_model[comp][j].lookup[i] = 16;
56
                s->pixel_model[comp][j].total_freq = 256;
57
            }
58
        }
59
    }
60
61
    for (j = 0; j < 6; j++) {
62
        uint32_t *p = s->run_model[j];
63
        for (i = 0; i < 256; i++)
64
            p[i] = 1;
65
        p[256] = 256;
66
    }
67
68
    for (j = 0; j < 6; j++) {
69
        uint32_t *op = s->op_model[j];
70
        for (i = 0; i < 6; i++)
71
            op[i] = 1;
72
        op[6] = 6;
73
    }
74
75
    for (i = 0; i < 256; i++) {
76
        s->range_model[i] = 1;
77
        s->count_model[i] = 1;
78
    }
79
    s->range_model[256] = 256;
80
    s->count_model[256] = 256;
81
82
    for (i = 0; i < 5; i++) {
83
        s->fill_model[i] = 1;
84
    }
85
    s->fill_model[5] = 5;
86
87
    for (j = 0; j < 4; j++) {
88
        for (i = 0; i < 16; i++) {
89
            s->sxy_model[j][i] = 1;
90
        }
91
        s->sxy_model[j][16] = 16;
92
    }
93
94
    for (i = 0; i < 512; i++) {
95
        s->mv_model[0][i] = 1;
96
        s->mv_model[1][i] = 1;
97
    }
98
    s->mv_model[0][512] = 512;
99
    s->mv_model[1][512] = 512;
100
}
101
102
static int decode(GetByteContext *gb, RangeCoder *rc, uint32_t cumFreq, uint32_t freq, uint32_t total_freq)
103
{
104
    rc->code -= cumFreq * rc->range;
105
    rc->range *= freq;
106
107
    while (rc->range < TOP && bytestream2_get_bytes_left(gb) > 0) {
108
        uint32_t byte = bytestream2_get_byteu(gb);
109
        rc->code = (rc->code << 8) | byte;
110
        rc->range <<= 8;
111
    }
112
113
    return 0;
114
}
115
116
static int get_freq(RangeCoder *rc, uint32_t total_freq, uint32_t *freq)
117
{
118
    if (total_freq == 0)
119
        return AVERROR_INVALIDDATA;
120
121
    rc->range = rc->range / total_freq;
122
123
    if (rc->range == 0)
124
        return AVERROR_INVALIDDATA;
125
126
    *freq = rc->code / rc->range;
127
128
    return 0;
129
}
130
131
static int decode0(GetByteContext *gb, RangeCoder *rc, uint32_t cumFreq, uint32_t freq, uint32_t total_freq)
132
{
133
    uint32_t t;
134
135
    if (total_freq == 0)
136
        return AVERROR_INVALIDDATA;
137
138
    t = rc->range * (uint64_t)cumFreq / total_freq;
139
140
    rc->code1 += t + 1;
141
    rc->range = rc->range * (uint64_t)(freq + cumFreq) / total_freq - (t + 1);
142
143
    while (rc->range < TOP && bytestream2_get_bytes_left(gb) > 0) {
144
        uint32_t byte = bytestream2_get_byteu(gb);
145
        rc->code = (rc->code << 8) | byte;
146
        rc->code1 <<= 8;
147
        rc->range <<= 8;
148
    }
149
150
    return 0;
151
}
152
153
static int get_freq0(RangeCoder *rc, uint32_t total_freq, uint32_t *freq)
154
{
155
    if (rc->range == 0)
156
        return AVERROR_INVALIDDATA;
157
158
    *freq = total_freq * (uint64_t)(rc->code - rc->code1) / rc->range;
159
160
    return 0;
161
}
162
163
static int decode_value(SCPRContext *s, uint32_t *cnt, uint32_t maxc, uint32_t step, uint32_t *rval)
164
{
165
    GetByteContext *gb = &s->gb;
166
    RangeCoder *rc = &s->rc;
167
    uint32_t totfr = cnt[maxc];
168
    uint32_t value;
169
    uint32_t c = 0, cumfr = 0, cnt_c = 0;
170
    int i, ret;
171
172
    if ((ret = s->get_freq(rc, totfr, &value)) < 0)
173
        return ret;
174
175
    while (c < maxc) {
176
        cnt_c = cnt[c];
177
        if (value >= cumfr + cnt_c)
178
            cumfr += cnt_c;
179
        else
180
            break;
181
        c++;
182
    }
183
184
    if (c >= maxc)
185
        return AVERROR_INVALIDDATA;
186
187
    if ((ret = s->decode(gb, rc, cumfr, cnt_c, totfr)) < 0)
188
        return ret;
189
190
    cnt[c] = cnt_c + step;
191
    totfr += step;
192
    if (totfr > BOT) {
193
        totfr = 0;
194
        for (i = 0; i < maxc; i++) {
195
            uint32_t nc = (cnt[i] >> 1) + 1;
196
            cnt[i] = nc;
197
            totfr += nc;
198
        }
199
    }
200
201
    cnt[maxc] = totfr;
202
    *rval = c;
203
204
    return 0;
205
}
206
207
static int decode_unit(SCPRContext *s, PixelModel *pixel, uint32_t step, uint32_t *rval)
208
{
209
    GetByteContext *gb = &s->gb;
210
    RangeCoder *rc = &s->rc;
211
    uint32_t totfr = pixel->total_freq;
212
    uint32_t value, x = 0, cumfr = 0, cnt_x = 0;
213
    int i, j, ret, c, cnt_c;
214
215
    if ((ret = s->get_freq(rc, totfr, &value)) < 0)
216
        return ret;
217
218
    while (x < 16) {
219
        cnt_x = pixel->lookup[x];
220
        if (value >= cumfr + cnt_x)
221
            cumfr += cnt_x;
222
        else
223
            break;
224
        x++;
225
    }
226
227
    c = x * 16;
228
    cnt_c = 0;
229
    while (c < 256) {
230
        cnt_c = pixel->freq[c];
231
        if (value >= cumfr + cnt_c)
232
            cumfr += cnt_c;
233
        else
234
            break;
235
        c++;
236
    }
237
    if (x >= 16 || c >= 256) {
238
        return AVERROR_INVALIDDATA;
239
    }
240
241
    if ((ret = s->decode(gb, rc, cumfr, cnt_c, totfr)) < 0)
242
        return ret;
243
244
    pixel->freq[c] = cnt_c + step;
245
    pixel->lookup[x] = cnt_x + step;
246
    totfr += step;
247
    if (totfr > BOT) {
248
        totfr = 0;
249
        for (i = 0; i < 256; i++) {
250
            uint32_t nc = (pixel->freq[i] >> 1) + 1;
251
            pixel->freq[i] = nc;
252
            totfr += nc;
253
        }
254
        for (i = 0; i < 16; i++) {
255
            uint32_t sum = 0;
256
            uint32_t i16_17 = i << 4;
257
            for (j = 0; j < 16; j++)
258
                sum += pixel->freq[i16_17 + j];
259
            pixel->lookup[i] = sum;
260
        }
261
    }
262
    pixel->total_freq = totfr;
263
264
    *rval = c & s->cbits;
265
266
    return 0;
267
}
268
269
static int decode_units(SCPRContext *s, uint32_t *r, uint32_t *g, uint32_t *b,
270
                        int *cx, int *cx1)
271
{
272
    const int cxshift = s->cxshift;
273
    int ret;
274
275
    ret = decode_unit(s, &s->pixel_model[0][*cx + *cx1], 400, r);
276
    if (ret < 0)
277
        return ret;
278
279
    *cx1 = (*cx << 6) & 0xFC0;
280
    *cx = *r >> cxshift;
281
    ret = decode_unit(s, &s->pixel_model[1][*cx + *cx1], 400, g);
282
    if (ret < 0)
283
        return ret;
284
285
    *cx1 = (*cx << 6) & 0xFC0;
286
    *cx = *g >> cxshift;
287
    ret = decode_unit(s, &s->pixel_model[2][*cx + *cx1], 400, b);
288
    if (ret < 0)
289
        return ret;
290
291
    *cx1 = (*cx << 6) & 0xFC0;
292
    *cx = *b >> cxshift;
293
294
    return 0;
295
}
296
297
static int decompress_i(AVCodecContext *avctx, uint32_t *dst, int linesize)
298
{
299
    SCPRContext *s = avctx->priv_data;
300
    GetByteContext *gb = &s->gb;
301
    int cx = 0, cx1 = 0, k = 0;
302
    int run, off, y = 0, x = 0, ret;
303
    uint32_t clr = 0, r, g, b, backstep = linesize - avctx->width;
304
    uint32_t lx, ly, ptype;
305
306
    reinit_tables(s);
307
    bytestream2_skip(gb, 2);
308
    init_rangecoder(&s->rc, gb);
309
310
    while (k < avctx->width + 1) {
311
        ret = decode_units(s, &r, &g, &b, &cx, &cx1);
312
        if (ret < 0)
313
            return ret;
314
315
        ret = decode_value(s, s->run_model[0], 256, 400, &run);
316
        if (ret < 0)
317
            return ret;
318
        if (run <= 0)
319
            return AVERROR_INVALIDDATA;
320
321
        clr = (b << 16) + (g << 8) + r;
322
        k += run;
323
        while (run-- > 0) {
324
            if (y >= avctx->height)
325
                return AVERROR_INVALIDDATA;
326
327
            dst[y * linesize + x] = clr;
328
            lx = x;
329
            ly = y;
330
            x++;
331
            if (x >= avctx->width) {
332
                x = 0;
333
                y++;
334
            }
335
        }
336
    }
337
    off = -linesize - 1;
338
    ptype = 0;
339
340
    while (x < avctx->width && y < avctx->height) {
341
        ret = decode_value(s, s->op_model[ptype], 6, 1000, &ptype);
342
        if (ret < 0)
343
            return ret;
344
        if (ptype == 0) {
345
            ret = decode_units(s, &r, &g, &b, &cx, &cx1);
346
            if (ret < 0)
347
                return ret;
348
349
            clr = (b << 16) + (g << 8) + r;
350
        }
351
        if (ptype > 5)
352
            return AVERROR_INVALIDDATA;
353
        ret = decode_value(s, s->run_model[ptype], 256, 400, &run);
354
        if (ret < 0)
355
            return ret;
356
        if (run <= 0)
357
            return AVERROR_INVALIDDATA;
358
359
        ret = decode_run_i(avctx, ptype, run, &x, &y, clr,
360
                           dst, linesize, &lx, &ly,
361
                           backstep, off, &cx, &cx1);
362
        if (ret < 0)
363
            return ret;
364
    }
365
366
    return 0;
367
}
368
369
static int decompress_p(AVCodecContext *avctx,
370
                        uint32_t *dst, int linesize,
371
                        uint32_t *prev, int plinesize)
372
{
373
    SCPRContext *s = avctx->priv_data;
374
    GetByteContext *gb = &s->gb;
375
    int ret, temp = 0, min, max, x, y, cx = 0, cx1 = 0;
376
    int backstep = linesize - avctx->width;
377
378
    if (bytestream2_get_byte(gb) == 0)
379
        return 1;
380
    bytestream2_skip(gb, 1);
381
    init_rangecoder(&s->rc, gb);
382
383
    ret  = decode_value(s, s->range_model, 256, 1, &min);
384
    ret |= decode_value(s, s->range_model, 256, 1, &temp);
385
    if (ret < 0)
386
        return ret;
387
388
    min += temp << 8;
389
    ret  = decode_value(s, s->range_model, 256, 1, &max);
390
    ret |= decode_value(s, s->range_model, 256, 1, &temp);
391
    if (ret < 0)
392
        return ret;
393
394
    max += temp << 8;
395
    if (min > max || min >= s->nbcount)
396
        return AVERROR_INVALIDDATA;
397
398
    memset(s->blocks, 0, sizeof(*s->blocks) * s->nbcount);
399
400
    while (min <= max) {
401
        int fill, count;
402
403
        ret  = decode_value(s, s->fill_model,  5,   10, &fill);
404
        ret |= decode_value(s, s->count_model, 256, 20, &count);
405
        if (ret < 0)
406
            return ret;
407
        if (count <= 0)
408
            return AVERROR_INVALIDDATA;
409
410
        while (min < s->nbcount && count-- > 0) {
411
            s->blocks[min++] = fill;
412
        }
413
    }
414
415
    ret = av_frame_copy(s->current_frame, s->last_frame);
416
    if (ret < 0)
417
        return ret;
418
419
    for (y = 0; y < s->nby; y++) {
420
        for (x = 0; x < s->nbx; x++) {
421
            int sy1 = 0, sy2 = 16, sx1 = 0, sx2 = 16;
422
423
            if (s->blocks[y * s->nbx + x] == 0)
424
                continue;
425
426
            if (((s->blocks[y * s->nbx + x] - 1) & 1) > 0) {
427
                ret  = decode_value(s, s->sxy_model[0], 16, 100, &sx1);
428
                ret |= decode_value(s, s->sxy_model[1], 16, 100, &sy1);
429
                ret |= decode_value(s, s->sxy_model[2], 16, 100, &sx2);
430
                ret |= decode_value(s, s->sxy_model[3], 16, 100, &sy2);
431
                if (ret < 0)
432
                    return ret;
433
434
                sx2++;
435
                sy2++;
436
            }
437
            if (((s->blocks[y * s->nbx + x] - 1) & 2) > 0) {
438
                int i, j, by = y * 16, bx = x * 16;
439
                int mvx, mvy;
440
441
                ret  = decode_value(s, s->mv_model[0], 512, 100, &mvx);
442
                ret |= decode_value(s, s->mv_model[1], 512, 100, &mvy);
443
                if (ret < 0)
444
                    return ret;
445
446
                mvx -= 256;
447
                mvy -= 256;
448
449
                if (by + mvy + sy1 < 0 || bx + mvx + sx1 < 0 ||
450
                    by + mvy + sy1 >= avctx->height || bx + mvx + sx1 >= avctx->width)
451
                    return AVERROR_INVALIDDATA;
452
453
                for (i = 0; i < sy2 - sy1 && (by + sy1 + i) < avctx->height && (by + mvy + sy1 + i) < avctx->height; i++) {
454
                    for (j = 0; j < sx2 - sx1 && (bx + sx1 + j) < avctx->width && (bx + mvx + sx1 + j) < avctx->width; j++) {
455
                        dst[(by + i + sy1) * linesize + bx + sx1 + j] = prev[(by + mvy + sy1 + i) * plinesize + bx + sx1 + mvx + j];
456
                    }
457
                }
458
            } else {
459
                int run, bx = x * 16 + sx1, by = y * 16 + sy1;
460
                uint32_t r, g, b, clr, ptype = 0;
461
462
                for (; by < y * 16 + sy2 && by < avctx->height;) {
463
                    ret = decode_value(s, s->op_model[ptype], 6, 1000, &ptype);
464
                    if (ret < 0)
465
                        return ret;
466
                    if (ptype == 0) {
467
                        ret = decode_units(s, &r, &g, &b, &cx, &cx1);
468
                        if (ret < 0)
469
                            return ret;
470
471
                        clr = (b << 16) + (g << 8) + r;
472
                    }
473
                    if (ptype > 5)
474
                        return AVERROR_INVALIDDATA;
475
                    ret = decode_value(s, s->run_model[ptype], 256, 400, &run);
476
                    if (ret < 0)
477
                        return ret;
478
                    if (run <= 0)
479
                        return AVERROR_INVALIDDATA;
480
481
                    ret = decode_run_p(avctx, ptype, run, x, y, clr,
482
                                       dst, prev, linesize, plinesize, &bx, &by,
483
                                       backstep, sx1, sx2, &cx, &cx1);
484
                    if (ret < 0)
485
                        return ret;
486
                }
487
            }
488
        }
489
    }
490
491
    return 0;
492
}
493
494
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
495
                        AVPacket *avpkt)
496
{
497
    SCPRContext *s = avctx->priv_data;
498
    GetByteContext *gb = &s->gb;
499
    AVFrame *frame = data;
500
    int ret, type;
501
502
    if (avctx->bits_per_coded_sample == 16) {
503
        if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
504
            return ret;
505
    }
506
507
    if ((ret = ff_reget_buffer(avctx, s->current_frame, 0)) < 0)
508
        return ret;
509
510
    bytestream2_init(gb, avpkt->data, avpkt->size);
511
512
    type = bytestream2_peek_byte(gb);
513
514
    if (type == 2) {
515
        s->version = 1;
516
        s->get_freq = get_freq0;
517
        s->decode = decode0;
518
        frame->key_frame = 1;
519
        ret = decompress_i(avctx, (uint32_t *)s->current_frame->data[0],
520
                           s->current_frame->linesize[0] / 4);
521
    } else if (type == 18) {
522
        s->version = 2;
523
        s->get_freq = get_freq;
524
        s->decode = decode;
525
        frame->key_frame = 1;
526
        ret = decompress_i(avctx, (uint32_t *)s->current_frame->data[0],
527
                           s->current_frame->linesize[0] / 4);
528
    } else if (type == 34) {
529
        frame->key_frame = 1;
530
        s->version = 3;
531
        ret = decompress_i3(avctx, (uint32_t *)s->current_frame->data[0],
532
                            s->current_frame->linesize[0] / 4);
533
    } else if (type == 17 || type == 33) {
534
        uint32_t clr, *dst = (uint32_t *)s->current_frame->data[0];
535
        int y;
536
537
        if (bytestream2_get_bytes_left(gb) < 3)
538
            return AVERROR_INVALIDDATA;
539
540
        frame->key_frame = 1;
541
        bytestream2_skip(gb, 1);
542
        if (avctx->bits_per_coded_sample == 16) {
543
            uint16_t value = bytestream2_get_le16(gb);
544
            int r, g, b;
545
546
            r = (value      ) & 31;
547
            g = (value >>  5) & 31;
548
            b = (value >> 10) & 31;
549
            clr = (r << 16) + (g << 8) + b;
550
        } else {
551
            clr = bytestream2_get_le24(gb);
552
        }
553
        for (y = 0; y < avctx->height; y++) {
554
            dst[0] = clr;
555
            av_memcpy_backptr((uint8_t*)(dst+1), 4, 4*avctx->width - 4);
556
            dst += s->current_frame->linesize[0] / 4;
557
        }
558
    } else if (type == 0 || type == 1) {
559
        frame->key_frame = 0;
560
561
        if (s->version == 1 || s->version == 2)
562
            ret = decompress_p(avctx, (uint32_t *)s->current_frame->data[0],
563
                               s->current_frame->linesize[0] / 4,
564
                               (uint32_t *)s->last_frame->data[0],
565
                               s->last_frame->linesize[0] / 4);
566
        else
567
            ret = decompress_p3(avctx, (uint32_t *)s->current_frame->data[0],
568
                                s->current_frame->linesize[0] / 4,
569
                                (uint32_t *)s->last_frame->data[0],
570
                                s->last_frame->linesize[0] / 4);
571
        if (ret == 1)
572
            return avpkt->size;
573
    } else {
574
        return AVERROR_PATCHWELCOME;
575
    }
576
577
    if (ret < 0)
578
        return ret;
579
580
    if (bytestream2_get_bytes_left(gb) > 5)
581
        return AVERROR_INVALIDDATA;
582
583
    if (avctx->bits_per_coded_sample != 16) {
584
        ret = av_frame_ref(data, s->current_frame);
585
        if (ret < 0)
586
            return ret;
587
    } else {
588
        uint8_t *dst = frame->data[0];
589
        int x, y;
590
591
        ret = av_frame_copy(frame, s->current_frame);
592
        if (ret < 0)
593
            return ret;
594
595
        // scale up each sample by 8
596
        for (y = 0; y < avctx->height; y++) {
597
            // If the image is sufficiently aligned, compute 8 samples at once
598
            if (!(((uintptr_t)dst) & 7)) {
599
                uint64_t *dst64 = (uint64_t *)dst;
600
                int w = avctx->width>>1;
601
                for (x = 0; x < w; x++) {
602
                    dst64[x] = (dst64[x] << 3) & 0xFCFCFCFCFCFCFCFCULL;
603
                }
604
                x *= 8;
605
            } else
606
                x = 0;
607
            for (; x < avctx->width * 4; x++) {
608
                dst[x] = dst[x] << 3;
609
            }
610
            dst += frame->linesize[0];
611
        }
612
    }
613
614
    frame->pict_type = frame->key_frame ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
615
616
    FFSWAP(AVFrame *, s->current_frame, s->last_frame);
617
618
    frame->data[0]     += frame->linesize[0] * (avctx->height - 1);
619
    frame->linesize[0] *= -1;
620
621
    *got_frame = 1;
622
623
    return avpkt->size;
624
}
625
626
static av_cold int decode_init(AVCodecContext *avctx)
627
{
628
    SCPRContext *s = avctx->priv_data;
629
630
    switch (avctx->bits_per_coded_sample) {
631
    case 16: avctx->pix_fmt = AV_PIX_FMT_RGB0; break;
632
    case 24:
633
    case 32: avctx->pix_fmt = AV_PIX_FMT_BGR0; break;
634
    default:
635
        av_log(avctx, AV_LOG_ERROR, "Unsupported bitdepth %i\n", avctx->bits_per_coded_sample);
636
        return AVERROR_INVALIDDATA;
637
    }
638
639
    s->get_freq = get_freq0;
640
    s->decode = decode0;
641
642
    s->cxshift = avctx->bits_per_coded_sample == 16 ? 0 : 2;
643
    s->cbits = avctx->bits_per_coded_sample == 16 ? 0x1F : 0xFF;
644
    s->nbx = (avctx->width + 15) / 16;
645
    s->nby = (avctx->height + 15) / 16;
646
    s->nbcount = s->nbx * s->nby;
647
    s->blocks = av_malloc_array(s->nbcount, sizeof(*s->blocks));
648
    if (!s->blocks)
649
        return AVERROR(ENOMEM);
650
651
    s->last_frame = av_frame_alloc();
652
    s->current_frame = av_frame_alloc();
653
    if (!s->last_frame || !s->current_frame)
654
        return AVERROR(ENOMEM);
655
656
    return 0;
657
}
658
659
static av_cold int decode_close(AVCodecContext *avctx)
660
{
661
    SCPRContext *s = avctx->priv_data;
662
663
    av_freep(&s->blocks);
664
    av_frame_free(&s->last_frame);
665
    av_frame_free(&s->current_frame);
666
667
    return 0;
668
}
669
670
AVCodec ff_scpr_decoder = {
671
    .name             = "scpr",
672
    .long_name        = NULL_IF_CONFIG_SMALL("ScreenPressor"),
673
    .type             = AVMEDIA_TYPE_VIDEO,
674
    .id               = AV_CODEC_ID_SCPR,
675
    .priv_data_size   = sizeof(SCPRContext),
676
    .init             = decode_init,
677
    .close            = decode_close,
678
    .decode           = decode_frame,
679
    .capabilities     = AV_CODEC_CAP_DR1,
680
    .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE |
681
                        FF_CODEC_CAP_INIT_CLEANUP,
682
};