GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/pixlet.c Lines: 330 407 81.1 %
Date: 2019-11-22 03:34:36 Branches: 111 174 63.8 %

Line Branch Exec Source
1
/*
2
 * Apple Pixlet decoder
3
 * Copyright (c) 2016 Paul B Mahol
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 <stdint.h>
23
24
#include "libavutil/imgutils.h"
25
#include "libavutil/intmath.h"
26
#include "libavutil/opt.h"
27
28
#include "avcodec.h"
29
#include "bytestream.h"
30
#include "get_bits.h"
31
#include "internal.h"
32
#include "thread.h"
33
#include "unary.h"
34
35
#define NB_LEVELS 4
36
37
#define PIXLET_MAGIC 0xDEADBEEF
38
39
#define H 0
40
#define V 1
41
42
typedef struct SubBand {
43
    unsigned width, height;
44
    unsigned size;
45
    unsigned x, y;
46
} SubBand;
47
48
typedef struct PixletContext {
49
    AVClass *class;
50
51
    GetByteContext gb;
52
    GetBitContext bc;
53
54
    int levels;
55
    int depth;
56
    int w, h;
57
58
    int16_t *filter[2];
59
    int16_t *prediction;
60
    int64_t scaling[4][2][NB_LEVELS];
61
    SubBand band[4][NB_LEVELS * 3 + 1];
62
} PixletContext;
63
64
2
static av_cold int pixlet_init(AVCodecContext *avctx)
65
{
66
2
    avctx->pix_fmt     = AV_PIX_FMT_YUV420P16;
67
2
    avctx->color_range = AVCOL_RANGE_JPEG;
68
2
    return 0;
69
}
70
71
3
static void free_buffers(AVCodecContext *avctx)
72
{
73
3
    PixletContext *ctx = avctx->priv_data;
74
75
3
    av_freep(&ctx->filter[0]);
76
3
    av_freep(&ctx->filter[1]);
77
3
    av_freep(&ctx->prediction);
78
3
}
79
80
2
static av_cold int pixlet_close(AVCodecContext *avctx)
81
{
82
2
    PixletContext *ctx = avctx->priv_data;
83
2
    free_buffers(avctx);
84
2
    ctx->w = 0;
85
2
    ctx->h = 0;
86
2
    return 0;
87
}
88
89
1
static int init_decoder(AVCodecContext *avctx)
90
{
91
1
    PixletContext *ctx = avctx->priv_data;
92
    int i, plane;
93
94
1
    ctx->filter[0]  = av_malloc_array(ctx->h, sizeof(int16_t));
95
1
    ctx->filter[1]  = av_malloc_array(FFMAX(ctx->h, ctx->w) + 16, sizeof(int16_t));
96
1
    ctx->prediction = av_malloc_array((ctx->w >> NB_LEVELS), sizeof(int16_t));
97

1
    if (!ctx->filter[0] || !ctx->filter[1] || !ctx->prediction)
98
        return AVERROR(ENOMEM);
99
100
4
    for (plane = 0; plane < 3; plane++) {
101
3
        unsigned shift = plane > 0;
102
3
        unsigned w     = ctx->w >> shift;
103
3
        unsigned h     = ctx->h >> shift;
104
105
3
        ctx->band[plane][0].width  =  w >> NB_LEVELS;
106
3
        ctx->band[plane][0].height =  h >> NB_LEVELS;
107
3
        ctx->band[plane][0].size   = (w >> NB_LEVELS) * (h >> NB_LEVELS);
108
109
39
        for (i = 0; i < NB_LEVELS * 3; i++) {
110
36
            unsigned scale = ctx->levels - (i / 3);
111
112
36
            ctx->band[plane][i + 1].width  =  w >> scale;
113
36
            ctx->band[plane][i + 1].height =  h >> scale;
114
36
            ctx->band[plane][i + 1].size   = (w >> scale) * (h >> scale);
115
116
36
            ctx->band[plane][i + 1].x = (w >> scale) * (((i + 1) % 3) != 2);
117
36
            ctx->band[plane][i + 1].y = (h >> scale) * (((i + 1) % 3) != 1);
118
        }
119
    }
120
121
1
    return 0;
122
}
123
124
9
static int read_low_coeffs(AVCodecContext *avctx, int16_t *dst, int size,
125
                           int width, ptrdiff_t stride)
126
{
127
9
    PixletContext *ctx = avctx->priv_data;
128
9
    GetBitContext *bc = &ctx->bc;
129
9
    unsigned cnt1, nbits, k, j = 0, i = 0;
130
9
    int64_t value, state = 3;
131
9
    int rlen, escape, flag = 0;
132
133
12
    while (i < size) {
134
3
        nbits = FFMIN(ff_clz((state >> 8) + 3) ^ 0x1F, 14);
135
136
3
        cnt1 = get_unary(bc, 0, 8);
137
3
        if (cnt1 < 8) {
138
            value = show_bits(bc, nbits);
139
            if (value <= 1) {
140
                skip_bits(bc, nbits - 1);
141
                escape = ((1 << nbits) - 1) * cnt1;
142
            } else {
143
                skip_bits(bc, nbits);
144
                escape = value + ((1 << nbits) - 1) * cnt1 - 1;
145
            }
146
        } else {
147
3
            escape = get_bits(bc, 16);
148
        }
149
150
3
        value    = -((escape + flag) & 1) | 1;
151
3
        dst[j++] = value * ((escape + flag + 1) >> 1);
152
3
        i++;
153
3
        if (j == width) {
154
3
            j    = 0;
155
3
            dst += stride;
156
        }
157
3
        state = 120 * (escape + flag) + state - (120 * state >> 8);
158
3
        flag  = 0;
159
160

3
        if (state * 4ULL > 0xFF || i >= size)
161
3
            continue;
162
163
        nbits  = ((state + 8) >> 5) + (state ? ff_clz(state) : 32) - 24;
164
        escape = av_mod_uintp2(16383, nbits);
165
        cnt1   = get_unary(bc, 0, 8);
166
        if (cnt1 > 7) {
167
            rlen = get_bits(bc, 16);
168
        } else {
169
            value = show_bits(bc, nbits);
170
            if (value > 1) {
171
                skip_bits(bc, nbits);
172
                rlen = value + escape * cnt1 - 1;
173
            } else {
174
                skip_bits(bc, nbits - 1);
175
                rlen = escape * cnt1;
176
            }
177
        }
178
179
        if (rlen > size - i)
180
            return AVERROR_INVALIDDATA;
181
        i += rlen;
182
183
        for (k = 0; k < rlen; k++) {
184
            dst[j++] = 0;
185
            if (j == width) {
186
                j    = 0;
187
                dst += stride;
188
            }
189
        }
190
191
        state = 0;
192
        flag  = rlen < 0xFFFF ? 1 : 0;
193
    }
194
195
9
    align_get_bits(bc);
196
9
    return get_bits_count(bc) >> 3;
197
}
198
199
36
static int read_high_coeffs(AVCodecContext *avctx, uint8_t *src, int16_t *dst,
200
                            int size, int c, int a, int d,
201
                            int width, ptrdiff_t stride)
202
{
203
36
    PixletContext *ctx = avctx->priv_data;
204
36
    GetBitContext *bc = &ctx->bc;
205
36
    unsigned cnt1, shbits, rlen, nbits, length, i = 0, j = 0, k;
206
36
    int ret, escape, pfx, value, yflag, xflag, flag = 0;
207
36
    int64_t state = 3, tmp;
208
209
36
    ret = init_get_bits8(bc, src, bytestream2_get_bytes_left(&ctx->gb));
210
36
    if (ret < 0)
211
        return ret;
212
213
36
    if (a ^ (a >> 31)) {
214
36
        nbits = 33 - ff_clz(a ^ (a >> 31));
215
36
        if (nbits > 16)
216
            return AVERROR_INVALIDDATA;
217
    } else {
218
        nbits = 1;
219
    }
220
221
36
    length = 25 - nbits;
222
223
751
    while (i < size) {
224
715
        if (state >> 8 != -3)
225
715
            value = ff_clz((state >> 8) + 3) ^ 0x1F;
226
        else
227
            value = -1;
228
229
715
        cnt1 = get_unary(bc, 0, length);
230
715
        if (cnt1 >= length) {
231
46
            cnt1 = get_bits(bc, nbits);
232
        } else {
233
669
            pfx = 14 + ((((uint64_t)(value - 14)) >> 32) & (value - 14));
234

669
            if (pfx < 1 || pfx > 25)
235
                return AVERROR_INVALIDDATA;
236
669
            cnt1 *= (1 << pfx) - 1;
237
669
            shbits = show_bits(bc, pfx);
238
669
            if (shbits <= 1) {
239
394
                skip_bits(bc, pfx - 1);
240
            } else {
241
275
                skip_bits(bc, pfx);
242
275
                cnt1 += shbits - 1;
243
            }
244
        }
245
246
715
        xflag = flag + cnt1;
247
715
        yflag = xflag;
248
249
715
        if (flag + cnt1 == 0) {
250
251
            value = 0;
251
        } else {
252
464
            xflag &= 1u;
253
464
            tmp    = (int64_t)c * ((yflag + 1) >> 1) + (c >> 1);
254
464
            value  = xflag + (tmp ^ -xflag);
255
        }
256
257
715
        i++;
258
715
        dst[j++] = value;
259
715
        if (j == width) {
260
85
            j    = 0;
261
85
            dst += stride;
262
        }
263
715
        state += (int64_t)d * (uint64_t)yflag - ((int64_t)(d * (uint64_t)state) >> 8);
264
265
715
        flag = 0;
266
267

715
        if ((uint64_t)state > 0xFF / 4 || i >= size)
268
651
            continue;
269
270
64
        pfx    = ((state + 8) >> 5) + (state ? ff_clz(state) : 32) - 24;
271
64
        escape = av_mod_uintp2(16383, pfx);
272
64
        cnt1   = get_unary(bc, 0, 8);
273
64
        if (cnt1 < 8) {
274

62
            if (pfx < 1 || pfx > 25)
275
                return AVERROR_INVALIDDATA;
276
277
62
            value = show_bits(bc, pfx);
278
62
            if (value > 1) {
279
40
                skip_bits(bc, pfx);
280
40
                rlen = value + escape * cnt1 - 1;
281
            } else {
282
22
                skip_bits(bc, pfx - 1);
283
22
                rlen = escape * cnt1;
284
            }
285
        } else {
286
2
            if (get_bits1(bc))
287
                value = get_bits(bc, 16);
288
            else
289
2
                value = get_bits(bc, 8);
290
291
2
            rlen = value + 8 * escape;
292
        }
293
294

64
        if (rlen > 0xFFFF || i + rlen > size)
295
            return AVERROR_INVALIDDATA;
296
64
        i += rlen;
297
298
879
        for (k = 0; k < rlen; k++) {
299
815
            dst[j++] = 0;
300
815
            if (j == width) {
301
95
                j    = 0;
302
95
                dst += stride;
303
            }
304
        }
305
306
64
        state = 0;
307
64
        flag  = rlen < 0xFFFF ? 1 : 0;
308
    }
309
310
36
    align_get_bits(bc);
311
36
    return get_bits_count(bc) >> 3;
312
}
313
314
3
static int read_highpass(AVCodecContext *avctx, uint8_t *ptr,
315
                         int plane, AVFrame *frame)
316
{
317
3
    PixletContext *ctx = avctx->priv_data;
318
3
    ptrdiff_t stride = frame->linesize[plane] / 2;
319
    int i, ret;
320
321
39
    for (i = 0; i < ctx->levels * 3; i++) {
322
36
        int32_t a = bytestream2_get_be32(&ctx->gb);
323
36
        int32_t b = bytestream2_get_be32(&ctx->gb);
324
36
        int32_t c = bytestream2_get_be32(&ctx->gb);
325
36
        int32_t d = bytestream2_get_be32(&ctx->gb);
326
36
        int16_t *dest = (int16_t *)frame->data[plane] +
327
36
                        ctx->band[plane][i + 1].x +
328
36
                        ctx->band[plane][i + 1].y * stride;
329
36
        unsigned size = ctx->band[plane][i + 1].size;
330
36
        uint32_t magic = bytestream2_get_be32(&ctx->gb);
331
332
36
        if (magic != PIXLET_MAGIC) {
333
            av_log(avctx, AV_LOG_ERROR,
334
                   "wrong magic number: 0x%08"PRIX32" for plane %d, band %d\n",
335
                   magic, plane, i);
336
            return AVERROR_INVALIDDATA;
337
        }
338
339
36
        if (a == INT32_MIN)
340
            return AVERROR_INVALIDDATA;
341
342
36
        ret = read_high_coeffs(avctx, ptr + bytestream2_tell(&ctx->gb), dest, size,
343
36
                               c, (b >= FFABS(a)) ? b : a, d,
344
36
                               ctx->band[plane][i + 1].width, stride);
345
36
        if (ret < 0) {
346
            av_log(avctx, AV_LOG_ERROR,
347
                   "error in highpass coefficients for plane %d, band %d\n",
348
                   plane, i);
349
            return ret;
350
        }
351
36
        bytestream2_skip(&ctx->gb, ret);
352
    }
353
354
3
    return 0;
355
}
356
357
3
static void lowpass_prediction(int16_t *dst, int16_t *pred,
358
                               int width, int height, ptrdiff_t stride)
359
{
360
    int16_t val;
361
    int i, j;
362
363
3
    memset(pred, 0, width * sizeof(*pred));
364
365
7
    for (i = 0; i < height; i++) {
366
4
        val    = pred[0] + dst[0];
367
4
        dst[0] = pred[0] = val;
368
6
        for (j = 1; j < width; j++) {
369
2
            val     = pred[j] + dst[j];
370
2
            dst[j]  = pred[j] = val;
371
2
            dst[j] += dst[j-1];
372
        }
373
4
        dst += stride;
374
    }
375
3
}
376
377
240
static void filterfn(int16_t *dest, int16_t *tmp, unsigned size, int64_t scale)
378
{
379
    int16_t *low, *high, *ll, *lh, *hl, *hh;
380
    int hsize, i, j;
381
    int64_t value;
382
383
240
    hsize = size >> 1;
384
240
    low   = tmp + 4;
385
240
    high  = &low[hsize + 8];
386
387
240
    memcpy(low, dest, size);
388
240
    memcpy(high, dest + hsize, size);
389
390
240
    ll = &low[hsize];
391
240
    lh = &low[hsize];
392
240
    hl = &high[hsize];
393
240
    hh = hl;
394
1200
    for (i = 4, j = 2; i; i--, j++, ll--, hh++, lh++, hl--) {
395
960
        low[i - 5]  = low[j - 1];
396
960
        lh[0]       = ll[-1];
397
960
        high[i - 5] = high[j - 2];
398
960
        hh[0]       = hl[-2];
399
    }
400
401
2280
    for (i = 0; i < hsize; i++) {
402
2040
        value = (int64_t) low [i + 1] * -INT64_C(325392907)  +
403
2040
                (int64_t) low [i + 0] *  INT64_C(3687786320) +
404
2040
                (int64_t) low [i - 1] * -INT64_C(325392907)  +
405
2040
                (int64_t) high[i + 0] *  INT64_C(1518500249) +
406
2040
                (int64_t) high[i - 1] *  INT64_C(1518500249);
407
2040
        dest[i * 2] = av_clip_int16(((value >> 32) * scale) >> 32);
408
    }
409
410
2280
    for (i = 0; i < hsize; i++) {
411
2040
        value = (int64_t) low [i + 2] * -INT64_C(65078576)   +
412
2040
                (int64_t) low [i + 1] *  INT64_C(1583578880) +
413
2040
                (int64_t) low [i + 0] *  INT64_C(1583578880) +
414
2040
                (int64_t) low [i - 1] * -INT64_C(65078576)   +
415
2040
                (int64_t) high[i + 1] *  INT64_C(303700064)  +
416
2040
                (int64_t) high[i + 0] * -INT64_C(3644400640) +
417
2040
                (int64_t) high[i - 1] *  INT64_C(303700064);
418
2040
        dest[i * 2 + 1] = av_clip_int16(((value >> 32) * scale) >> 32);
419
    }
420
240
}
421
422
3
static void reconstruction(AVCodecContext *avctx, int16_t *dest,
423
                           unsigned width, unsigned height, ptrdiff_t stride,
424
                           int64_t *scaling_h, int64_t *scaling_v)
425
{
426
3
    PixletContext *ctx = avctx->priv_data;
427
    unsigned scaled_width, scaled_height;
428
    int16_t *ptr, *tmp;
429
    int i, j, k;
430
431
3
    scaled_width  = width  >> NB_LEVELS;
432
3
    scaled_height = height >> NB_LEVELS;
433
3
    tmp           = ctx->filter[0];
434
435
15
    for (i = 0; i < NB_LEVELS; i++) {
436
12
        int64_t scale_v = scaling_v[i];
437
12
        int64_t scale_h = scaling_h[i];
438
12
        scaled_width  <<= 1;
439
12
        scaled_height <<= 1;
440
441
12
        ptr = dest;
442
132
        for (j = 0; j < scaled_height; j++) {
443
120
            filterfn(ptr, ctx->filter[1], scaled_width, scale_v);
444
120
            ptr += stride;
445
        }
446
447
132
        for (j = 0; j < scaled_width; j++) {
448
120
            ptr = dest + j;
449
2160
            for (k = 0; k < scaled_height; k++) {
450
2040
                tmp[k] = *ptr;
451
2040
                ptr   += stride;
452
            }
453
454
120
            filterfn(tmp, ctx->filter[1], scaled_height, scale_h);
455
456
120
            ptr = dest + j;
457
2160
            for (k = 0; k < scaled_height; k++) {
458
2040
                *ptr = tmp[k];
459
2040
                ptr += stride;
460
            }
461
        }
462
    }
463
3
}
464
465
1
static void postprocess_luma(AVFrame *frame, int w, int h, int depth)
466
{
467
1
    uint16_t *dsty = (uint16_t *)frame->data[0];
468
1
    int16_t *srcy  = (int16_t *)frame->data[0];
469
1
    ptrdiff_t stridey = frame->linesize[0] / 2;
470
    int i, j;
471
472
33
    for (j = 0; j < h; j++) {
473
1056
        for (i = 0; i < w; i++) {
474
1024
            if (srcy[i] <= 0)
475
1
                dsty[i] = 0;
476
1023
            else if (srcy[i] > ((1 << depth) - 1))
477
                dsty[i] = 65535;
478
            else
479
1023
                dsty[i] = ((int64_t) srcy[i] * srcy[i] * 65535) /
480
1023
                          ((1 << depth) - 1) / ((1 << depth) - 1);
481
        }
482
32
        dsty += stridey;
483
32
        srcy += stridey;
484
    }
485
1
}
486
487
1
static void postprocess_chroma(AVFrame *frame, int w, int h, int depth)
488
{
489
1
    uint16_t *dstu = (uint16_t *)frame->data[1];
490
1
    uint16_t *dstv = (uint16_t *)frame->data[2];
491
1
    int16_t *srcu  = (int16_t *)frame->data[1];
492
1
    int16_t *srcv  = (int16_t *)frame->data[2];
493
1
    ptrdiff_t strideu = frame->linesize[1] / 2;
494
1
    ptrdiff_t stridev = frame->linesize[2] / 2;
495
1
    const unsigned add = 1 << (depth - 1);
496
1
    const unsigned shift = 16 - depth;
497
    int i, j;
498
499
17
    for (j = 0; j < h; j++) {
500
272
        for (i = 0; i < w; i++) {
501
256
            dstu[i] = av_clip_uintp2_c(add + srcu[i], depth) << shift;
502
256
            dstv[i] = av_clip_uintp2_c(add + srcv[i], depth) << shift;
503
        }
504
16
        dstu += strideu;
505
16
        dstv += stridev;
506
16
        srcu += strideu;
507
16
        srcv += stridev;
508
    }
509
1
}
510
511
3
static int decode_plane(AVCodecContext *avctx, int plane,
512
                        AVPacket *avpkt, AVFrame *frame)
513
{
514
3
    PixletContext *ctx = avctx->priv_data;
515
3
    ptrdiff_t stride   = frame->linesize[plane] / 2;
516
3
    unsigned shift     = plane > 0;
517
    int16_t *dst;
518
    int i, ret;
519
520
15
    for (i = ctx->levels - 1; i >= 0; i--) {
521
12
        int32_t h = sign_extend(bytestream2_get_be32(&ctx->gb), 32);
522
12
        int32_t v = sign_extend(bytestream2_get_be32(&ctx->gb), 32);
523
524

12
        if (!h || !v)
525
            return AVERROR_INVALIDDATA;
526
527
12
        ctx->scaling[plane][H][i] = (1000000ULL << 32) / h;
528
12
        ctx->scaling[plane][V][i] = (1000000ULL << 32) / v;
529
    }
530
531
3
    bytestream2_skip(&ctx->gb, 4);
532
533
3
    dst    = (int16_t *)frame->data[plane];
534
3
    dst[0] = sign_extend(bytestream2_get_be16(&ctx->gb), 16);
535
536
3
    ret = init_get_bits8(&ctx->bc, avpkt->data + bytestream2_tell(&ctx->gb),
537
3
                         bytestream2_get_bytes_left(&ctx->gb));
538
3
    if (ret < 0)
539
        return ret;
540
541
3
    ret = read_low_coeffs(avctx, dst + 1, ctx->band[plane][0].width - 1,
542
3
                          ctx->band[plane][0].width - 1, 0);
543
3
    if (ret < 0) {
544
        av_log(avctx, AV_LOG_ERROR,
545
               "error in lowpass coefficients for plane %d, top row\n", plane);
546
        return ret;
547
    }
548
549
3
    ret = read_low_coeffs(avctx, dst + stride,
550
3
                          ctx->band[plane][0].height - 1, 1, stride);
551
3
    if (ret < 0) {
552
        av_log(avctx, AV_LOG_ERROR,
553
               "error in lowpass coefficients for plane %d, left column\n",
554
               plane);
555
        return ret;
556
    }
557
558
3
    ret = read_low_coeffs(avctx, dst + stride + 1,
559
3
                          (ctx->band[plane][0].width - 1) * (ctx->band[plane][0].height - 1),
560
3
                          ctx->band[plane][0].width - 1, stride);
561
3
    if (ret < 0) {
562
        av_log(avctx, AV_LOG_ERROR,
563
               "error in lowpass coefficients for plane %d, rest\n", plane);
564
        return ret;
565
    }
566
567
3
    bytestream2_skip(&ctx->gb, ret);
568
3
    if (bytestream2_get_bytes_left(&ctx->gb) <= 0) {
569
        av_log(avctx, AV_LOG_ERROR, "no bytes left\n");
570
        return AVERROR_INVALIDDATA;
571
    }
572
573
3
    ret = read_highpass(avctx, avpkt->data, plane, frame);
574
3
    if (ret < 0)
575
        return ret;
576
577
3
    lowpass_prediction(dst, ctx->prediction, ctx->band[plane][0].width,
578
3
                       ctx->band[plane][0].height, stride);
579
580
3
    reconstruction(avctx, (int16_t *)frame->data[plane], ctx->w >> shift,
581
3
                   ctx->h >> shift, stride, ctx->scaling[plane][H],
582
3
                   ctx->scaling[plane][V]);
583
584
3
    return 0;
585
}
586
587
1
static int pixlet_decode_frame(AVCodecContext *avctx, void *data,
588
                               int *got_frame, AVPacket *avpkt)
589
{
590
1
    PixletContext *ctx = avctx->priv_data;
591
    int i, w, h, width, height, ret, version;
592
1
    AVFrame *p = data;
593
1
    ThreadFrame frame = { .f = data };
594
    uint32_t pktsize;
595
596
1
    bytestream2_init(&ctx->gb, avpkt->data, avpkt->size);
597
598
1
    pktsize = bytestream2_get_be32(&ctx->gb);
599

1
    if (pktsize <= 44 || pktsize - 4 > bytestream2_get_bytes_left(&ctx->gb)) {
600
        av_log(avctx, AV_LOG_ERROR, "Invalid packet size %"PRIu32"\n", pktsize);
601
        return AVERROR_INVALIDDATA;
602
    }
603
604
1
    version = bytestream2_get_le32(&ctx->gb);
605
1
    if (version != 1)
606
        avpriv_request_sample(avctx, "Version %d", version);
607
608
1
    bytestream2_skip(&ctx->gb, 4);
609
1
    if (bytestream2_get_be32(&ctx->gb) != 1)
610
        return AVERROR_INVALIDDATA;
611
1
    bytestream2_skip(&ctx->gb, 4);
612
613
1
    width  = bytestream2_get_be32(&ctx->gb);
614
1
    height = bytestream2_get_be32(&ctx->gb);
615
616
1
    if (    width > INT_MAX - (1U << (NB_LEVELS + 1))
617
1
        || height > INT_MAX - (1U << (NB_LEVELS + 1)))
618
        return AVERROR_INVALIDDATA;
619
620
1
    w = FFALIGN(width,  1 << (NB_LEVELS + 1));
621
1
    h = FFALIGN(height, 1 << (NB_LEVELS + 1));
622
623
1
    ctx->levels = bytestream2_get_be32(&ctx->gb);
624
1
    if (ctx->levels != NB_LEVELS)
625
        return AVERROR_INVALIDDATA;
626
1
    ctx->depth = bytestream2_get_be32(&ctx->gb);
627

1
    if (ctx->depth < 8 || ctx->depth > 15) {
628
        avpriv_request_sample(avctx, "Depth %d", ctx->depth);
629
        return AVERROR_INVALIDDATA;
630
    }
631
632
1
    ret = ff_set_dimensions(avctx, w, h);
633
1
    if (ret < 0)
634
        return ret;
635
1
    avctx->width  = width;
636
1
    avctx->height = height;
637
638

1
    if (ctx->w != w || ctx->h != h) {
639
1
        free_buffers(avctx);
640
1
        ctx->w = w;
641
1
        ctx->h = h;
642
643
1
        ret = init_decoder(avctx);
644
1
        if (ret < 0) {
645
            free_buffers(avctx);
646
            ctx->w = 0;
647
            ctx->h = 0;
648
            return ret;
649
        }
650
    }
651
652
1
    bytestream2_skip(&ctx->gb, 8);
653
654
1
    p->pict_type = AV_PICTURE_TYPE_I;
655
1
    p->key_frame = 1;
656
1
    p->color_range = AVCOL_RANGE_JPEG;
657
658
1
    ret = ff_thread_get_buffer(avctx, &frame, 0);
659
1
    if (ret < 0)
660
        return ret;
661
662
4
    for (i = 0; i < 3; i++) {
663
3
        ret = decode_plane(avctx, i, avpkt, frame.f);
664
3
        if (ret < 0)
665
            return ret;
666
3
        if (avctx->flags & AV_CODEC_FLAG_GRAY)
667
            break;
668
    }
669
670
1
    postprocess_luma(frame.f, ctx->w, ctx->h, ctx->depth);
671
1
    postprocess_chroma(frame.f, ctx->w >> 1, ctx->h >> 1, ctx->depth);
672
673
1
    *got_frame = 1;
674
675
1
    return pktsize;
676
}
677
678
#if HAVE_THREADS
679
static int pixlet_init_thread_copy(AVCodecContext *avctx)
680
{
681
    PixletContext *ctx = avctx->priv_data;
682
683
    ctx->filter[0]  = NULL;
684
    ctx->filter[1]  = NULL;
685
    ctx->prediction = NULL;
686
    ctx->w = 0;
687
    ctx->h = 0;
688
689
    return 0;
690
}
691
#endif /* HAVE_THREADS */
692
693
AVCodec ff_pixlet_decoder = {
694
    .name             = "pixlet",
695
    .long_name        = NULL_IF_CONFIG_SMALL("Apple Pixlet"),
696
    .type             = AVMEDIA_TYPE_VIDEO,
697
    .id               = AV_CODEC_ID_PIXLET,
698
    .init             = pixlet_init,
699
    .init_thread_copy = ONLY_IF_THREADS_ENABLED(pixlet_init_thread_copy),
700
    .close            = pixlet_close,
701
    .decode           = pixlet_decode_frame,
702
    .priv_data_size   = sizeof(PixletContext),
703
    .capabilities     = AV_CODEC_CAP_DR1 |
704
                        AV_CODEC_CAP_FRAME_THREADS,
705
    .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE |
706
                        FF_CODEC_CAP_INIT_CLEANUP,
707
};