GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/dxtory.c Lines: 52 475 10.9 %
Date: 2020-11-28 20:53:16 Branches: 13 193 6.7 %

Line Branch Exec Source
1
/*
2
 * Dxtory decoder
3
 *
4
 * Copyright (c) 2011 Konstantin Shishkov
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 <inttypes.h>
24
25
#include "libavutil/common.h"
26
#include "libavutil/intreadwrite.h"
27
28
#define BITSTREAM_READER_LE
29
#include "avcodec.h"
30
#include "bytestream.h"
31
#include "get_bits.h"
32
#include "internal.h"
33
#include "unary.h"
34
#include "thread.h"
35
36
2
static int64_t get_raw_size(enum AVPixelFormat fmt, int width, int height)
37
{
38

2
    switch (fmt) {
39
    case AV_PIX_FMT_RGB555LE:
40
    case AV_PIX_FMT_RGB565LE:
41
        return width * height * 2LL;
42
    case AV_PIX_FMT_RGB24:
43
    case AV_PIX_FMT_BGR24:
44
    case AV_PIX_FMT_YUV444P:
45
        return width * height * 3LL;
46
2
    case AV_PIX_FMT_YUV420P:
47
2
        return (int64_t)(width * height) + 2 * AV_CEIL_RSHIFT(width, 1) * AV_CEIL_RSHIFT(height, 1);
48
    case AV_PIX_FMT_YUV410P:
49
        return (int64_t)(width * height) + 2 * AV_CEIL_RSHIFT(width, 2) * AV_CEIL_RSHIFT(height, 2);
50
    }
51
52
    return 0;
53
}
54
55
4
static void do_vflip(AVCodecContext *avctx, AVFrame *pic, int vflip)
56
{
57
4
    if (!vflip)
58
4
        return;
59
60
    switch (pic->format) {
61
    case AV_PIX_FMT_YUV444P:
62
        pic->data[1] += (avctx->height - 1) * pic->linesize[1];
63
        pic->linesize[1] = -pic->linesize[1];
64
        pic->data[2] += (avctx->height - 1) * pic->linesize[2];
65
        pic->linesize[2] = -pic->linesize[2];
66
    case AV_PIX_FMT_RGB555LE:
67
    case AV_PIX_FMT_RGB565LE:
68
    case AV_PIX_FMT_BGR24:
69
    case AV_PIX_FMT_RGB24:
70
        pic->data[0] += (avctx->height - 1) * pic->linesize[0];
71
        pic->linesize[0] = -pic->linesize[0];
72
        break;
73
    case AV_PIX_FMT_YUV410P:
74
        pic->data[0] += (avctx->height - 1) * pic->linesize[0];
75
        pic->linesize[0] = -pic->linesize[0];
76
        pic->data[1] += (AV_CEIL_RSHIFT(avctx->height, 2) - 1) * pic->linesize[1];
77
        pic->linesize[1] = -pic->linesize[1];
78
        pic->data[2] += (AV_CEIL_RSHIFT(avctx->height, 2) - 1) * pic->linesize[2];
79
        pic->linesize[2] = -pic->linesize[2];
80
        break;
81
    case AV_PIX_FMT_YUV420P:
82
        pic->data[0] += (avctx->height - 1) * pic->linesize[0];
83
        pic->linesize[0] = -pic->linesize[0];
84
        pic->data[1] += (AV_CEIL_RSHIFT(avctx->height, 1) - 1) * pic->linesize[1];
85
        pic->linesize[1] = -pic->linesize[1];
86
        pic->data[2] += (AV_CEIL_RSHIFT(avctx->height, 1) - 1) * pic->linesize[2];
87
        pic->linesize[2] = -pic->linesize[2];
88
        break;
89
    }
90
}
91
92
static int dxtory_decode_v1_rgb(AVCodecContext *avctx, AVFrame *pic,
93
                                const uint8_t *src, int src_size,
94
                                int id, int bpp, uint32_t vflipped)
95
{
96
    ThreadFrame frame = { .f = pic };
97
    int h;
98
    uint8_t *dst;
99
    int ret;
100
101
    if (src_size < get_raw_size(id, avctx->width, avctx->height)) {
102
        av_log(avctx, AV_LOG_ERROR, "packet too small\n");
103
        return AVERROR_INVALIDDATA;
104
    }
105
106
    avctx->pix_fmt = id;
107
    if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
108
        return ret;
109
110
    do_vflip(avctx, pic, vflipped);
111
112
    dst = pic->data[0];
113
    for (h = 0; h < avctx->height; h++) {
114
        memcpy(dst, src, avctx->width * bpp);
115
        src += avctx->width * bpp;
116
        dst += pic->linesize[0];
117
    }
118
119
    do_vflip(avctx, pic, vflipped);
120
121
    return 0;
122
}
123
124
static int dxtory_decode_v1_410(AVCodecContext *avctx, AVFrame *pic,
125
                                const uint8_t *src, int src_size,
126
                                uint32_t vflipped)
127
{
128
    ThreadFrame frame = { .f = pic };
129
    int h, w;
130
    uint8_t *Y1, *Y2, *Y3, *Y4, *U, *V;
131
    int height, width, hmargin, vmargin;
132
    int huvborder;
133
    int ret;
134
135
    if (src_size < get_raw_size(AV_PIX_FMT_YUV410P, avctx->width, avctx->height)) {
136
        av_log(avctx, AV_LOG_ERROR, "packet too small\n");
137
        return AVERROR_INVALIDDATA;
138
    }
139
140
    avctx->pix_fmt = AV_PIX_FMT_YUV410P;
141
    if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
142
        return ret;
143
144
    do_vflip(avctx, pic, vflipped);
145
146
    height = avctx->height & ~3;
147
    width  = avctx->width  & ~3;
148
    hmargin = avctx->width  - width;
149
    vmargin = avctx->height - height;
150
    huvborder = AV_CEIL_RSHIFT(avctx->width, 2) - 1;
151
152
    Y1 = pic->data[0];
153
    Y2 = pic->data[0] + pic->linesize[0];
154
    Y3 = pic->data[0] + pic->linesize[0] * 2;
155
    Y4 = pic->data[0] + pic->linesize[0] * 3;
156
    U  = pic->data[1];
157
    V  = pic->data[2];
158
    for (h = 0; h < height; h += 4) {
159
        for (w = 0; w < width; w += 4) {
160
            AV_COPY32U(Y1 + w, src);
161
            AV_COPY32U(Y2 + w, src + 4);
162
            AV_COPY32U(Y3 + w, src + 8);
163
            AV_COPY32U(Y4 + w, src + 12);
164
            U[w >> 2] = src[16] + 0x80;
165
            V[w >> 2] = src[17] + 0x80;
166
            src += 18;
167
        }
168
        if (hmargin) {
169
            for (w = 0; w < hmargin; w++) {
170
                Y1[width + w] = src[w];
171
                Y2[width + w] = src[w + hmargin * 1];
172
                Y3[width + w] = src[w + hmargin * 2];
173
                Y4[width + w] = src[w + hmargin * 3];
174
            }
175
            src += 4 * hmargin;
176
            U[huvborder] = src[0] + 0x80;
177
            V[huvborder] = src[1] + 0x80;
178
            src += 2;
179
        }
180
        Y1 += pic->linesize[0] * 4;
181
        Y2 += pic->linesize[0] * 4;
182
        Y3 += pic->linesize[0] * 4;
183
        Y4 += pic->linesize[0] * 4;
184
        U  += pic->linesize[1];
185
        V  += pic->linesize[2];
186
    }
187
188
    if (vmargin) {
189
        for (w = 0; w < width; w += 4) {
190
            AV_COPY32U(Y1 + w, src);
191
            if (vmargin > 1)
192
                AV_COPY32U(Y2 + w, src + 4);
193
            if (vmargin > 2)
194
                AV_COPY32U(Y3 + w, src + 8);
195
            src += 4 * vmargin;
196
            U[w >> 2] = src[0] + 0x80;
197
            V[w >> 2] = src[1] + 0x80;
198
            src += 2;
199
        }
200
        if (hmargin) {
201
            for (w = 0; w < hmargin; w++) {
202
                AV_COPY32U(Y1 + w, src);
203
                if (vmargin > 1)
204
                    AV_COPY32U(Y2 + w, src + 4);
205
                if (vmargin > 2)
206
                    AV_COPY32U(Y3 + w, src + 8);
207
                src += 4 * vmargin;
208
            }
209
            U[huvborder] = src[0] + 0x80;
210
            V[huvborder] = src[1] + 0x80;
211
            src += 2;
212
        }
213
    }
214
215
    do_vflip(avctx, pic, vflipped);
216
217
    return 0;
218
}
219
220
2
static int dxtory_decode_v1_420(AVCodecContext *avctx, AVFrame *pic,
221
                                const uint8_t *src, int src_size,
222
                                uint32_t vflipped)
223
{
224
2
    ThreadFrame frame = { .f = pic };
225
    int h, w;
226
    uint8_t *Y1, *Y2, *U, *V;
227
    int height, width, hmargin, vmargin;
228
    int huvborder;
229
    int ret;
230
231
2
    if (src_size < get_raw_size(AV_PIX_FMT_YUV420P, avctx->width, avctx->height)) {
232
        av_log(avctx, AV_LOG_ERROR, "packet too small\n");
233
        return AVERROR_INVALIDDATA;
234
    }
235
236
2
    avctx->pix_fmt = AV_PIX_FMT_YUV420P;
237
2
    if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
238
        return ret;
239
240
2
    do_vflip(avctx, pic, vflipped);
241
242
2
    height = avctx->height & ~1;
243
2
    width  = avctx->width  & ~1;
244
2
    hmargin = avctx->width  - width;
245
2
    vmargin = avctx->height - height;
246
2
    huvborder = AV_CEIL_RSHIFT(avctx->width, 1) - 1;
247
248
2
    Y1 = pic->data[0];
249
2
    Y2 = pic->data[0] + pic->linesize[0];
250
2
    U  = pic->data[1];
251
2
    V  = pic->data[2];
252
722
    for (h = 0; h < height; h += 2) {
253
461520
        for (w = 0; w < width; w += 2) {
254
460800
            AV_COPY16(Y1 + w, src);
255
460800
            AV_COPY16(Y2 + w, src + 2);
256
460800
            U[w >> 1] = src[4] + 0x80;
257
460800
            V[w >> 1] = src[5] + 0x80;
258
460800
            src += 6;
259
        }
260
720
        if (hmargin) {
261
            Y1[width + 1] = src[0];
262
            Y2[width + 1] = src[1];
263
            U[huvborder] = src[2] + 0x80;
264
            V[huvborder] = src[3] + 0x80;
265
            src += 4;
266
        }
267
720
        Y1 += pic->linesize[0] << 1;
268
720
        Y2 += pic->linesize[0] << 1;
269
720
        U  += pic->linesize[1];
270
720
        V  += pic->linesize[2];
271
    }
272
273
2
    if (vmargin) {
274
        for (w = 0; w < width; w += 2) {
275
            AV_COPY16U(Y1 + w, src);
276
            U[w >> 1] = src[0] + 0x80;
277
            V[w >> 1] = src[1] + 0x80;
278
            src += 4;
279
        }
280
        if (hmargin) {
281
            Y1[w] = src[0];
282
            U[huvborder] = src[1] + 0x80;
283
            V[huvborder] = src[2] + 0x80;
284
            src += 3;
285
        }
286
    }
287
288
2
    do_vflip(avctx, pic, vflipped);
289
290
2
    return 0;
291
}
292
293
static int dxtory_decode_v1_444(AVCodecContext *avctx, AVFrame *pic,
294
                                const uint8_t *src, int src_size,
295
                                uint32_t vflipped)
296
{
297
    ThreadFrame frame = { .f = pic };
298
    int h, w;
299
    uint8_t *Y, *U, *V;
300
    int ret;
301
302
    if (src_size < get_raw_size(AV_PIX_FMT_YUV444P, avctx->width, avctx->height)) {
303
        av_log(avctx, AV_LOG_ERROR, "packet too small\n");
304
        return AVERROR_INVALIDDATA;
305
    }
306
307
    avctx->pix_fmt = AV_PIX_FMT_YUV444P;
308
    if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
309
        return ret;
310
311
    do_vflip(avctx, pic, vflipped);
312
313
    Y = pic->data[0];
314
    U = pic->data[1];
315
    V = pic->data[2];
316
    for (h = 0; h < avctx->height; h++) {
317
        for (w = 0; w < avctx->width; w++) {
318
            Y[w] = *src++;
319
            U[w] = *src++ ^ 0x80;
320
            V[w] = *src++ ^ 0x80;
321
        }
322
        Y += pic->linesize[0];
323
        U += pic->linesize[1];
324
        V += pic->linesize[2];
325
    }
326
327
    do_vflip(avctx, pic, vflipped);
328
329
    return 0;
330
}
331
332
static const uint8_t def_lru[8] = { 0x00, 0x20, 0x40, 0x60, 0x80, 0xA0, 0xC0, 0xFF };
333
static const uint8_t def_lru_555[8] = { 0x00, 0x08, 0x10, 0x18, 0x1F };
334
static const uint8_t def_lru_565[8] = { 0x00, 0x08, 0x10, 0x20, 0x30, 0x3F };
335
336
static inline uint8_t decode_sym(GetBitContext *gb, uint8_t lru[8])
337
{
338
    uint8_t c, val;
339
340
    c = get_unary(gb, 0, 8);
341
    if (!c) {
342
        val = get_bits(gb, 8);
343
        memmove(lru + 1, lru, sizeof(*lru) * (8 - 1));
344
    } else {
345
        val = lru[c - 1];
346
        memmove(lru + 1, lru, sizeof(*lru) * (c - 1));
347
    }
348
    lru[0] = val;
349
350
    return val;
351
}
352
353
static int check_slice_size(AVCodecContext *avctx,
354
                            const uint8_t *src, int src_size,
355
                            int slice_size, int off)
356
{
357
    int cur_slice_size;
358
359
    if (slice_size > src_size - off) {
360
        av_log(avctx, AV_LOG_ERROR,
361
               "invalid slice size %d (only %d bytes left)\n",
362
               slice_size, src_size - off);
363
        return AVERROR_INVALIDDATA;
364
    }
365
    if (slice_size <= 16) {
366
        av_log(avctx, AV_LOG_ERROR, "invalid slice size %d\n",
367
               slice_size);
368
        return AVERROR_INVALIDDATA;
369
    }
370
371
    cur_slice_size = AV_RL32(src + off);
372
    if (cur_slice_size != slice_size - 16) {
373
        av_log(avctx, AV_LOG_ERROR,
374
               "Slice sizes mismatch: got %d instead of %d\n",
375
               cur_slice_size, slice_size - 16);
376
    }
377
378
    return 0;
379
}
380
381
static int load_buffer(AVCodecContext *avctx,
382
                       const uint8_t *src, int src_size,
383
                       GetByteContext *gb,
384
                       int *nslices, int *off)
385
{
386
    bytestream2_init(gb, src, src_size);
387
    *nslices = bytestream2_get_le16(gb);
388
    *off = FFALIGN(*nslices * 4 + 2, 16);
389
    if (src_size < *off) {
390
        av_log(avctx, AV_LOG_ERROR, "no slice data\n");
391
        return AVERROR_INVALIDDATA;
392
    }
393
394
    if (!*nslices) {
395
        avpriv_request_sample(avctx, "%d slices for %dx%d", *nslices,
396
                              avctx->width, avctx->height);
397
        return AVERROR_PATCHWELCOME;
398
    }
399
400
    return 0;
401
}
402
403
static inline uint8_t decode_sym_565(GetBitContext *gb, uint8_t lru[8],
404
                                     int bits)
405
{
406
    uint8_t c, val;
407
408
    c = get_unary(gb, 0, bits);
409
    if (!c) {
410
        val = get_bits(gb, bits);
411
        memmove(lru + 1, lru, sizeof(*lru) * (6 - 1));
412
    } else {
413
        val = lru[c - 1];
414
        memmove(lru + 1, lru, sizeof(*lru) * (c - 1));
415
    }
416
    lru[0] = val;
417
418
    return val;
419
}
420
421
typedef int (*decode_slice_func)(GetBitContext *gb, AVFrame *frame,
422
                                 int line, int height, uint8_t lru[3][8]);
423
424
typedef void (*setup_lru_func)(uint8_t lru[3][8]);
425
426
static int dxtory_decode_v2(AVCodecContext *avctx, AVFrame *pic,
427
                            const uint8_t *src, int src_size,
428
                            decode_slice_func decode_slice,
429
                            setup_lru_func setup_lru,
430
                            enum AVPixelFormat fmt,
431
                            uint32_t vflipped)
432
{
433
    ThreadFrame frame = { .f = pic };
434
    GetByteContext gb, gb_check;
435
    GetBitContext  gb2;
436
    int nslices, slice, line = 0;
437
    uint32_t off, slice_size;
438
    uint64_t off_check;
439
    uint8_t lru[3][8];
440
    int ret;
441
442
    ret = load_buffer(avctx, src, src_size, &gb, &nslices, &off);
443
    if (ret < 0)
444
        return ret;
445
446
    off_check = off;
447
    gb_check = gb;
448
    for (slice = 0; slice < nslices; slice++) {
449
        slice_size = bytestream2_get_le32(&gb_check);
450
451
        if (slice_size <= 16 + (avctx->height * avctx->width / (8 * nslices)))
452
            return AVERROR_INVALIDDATA;
453
        off_check += slice_size;
454
    }
455
456
    if (off_check - avctx->discard_damaged_percentage*off_check/100 > src_size)
457
        return AVERROR_INVALIDDATA;
458
459
    avctx->pix_fmt = fmt;
460
    if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
461
        return ret;
462
463
    do_vflip(avctx, pic, vflipped);
464
465
    for (slice = 0; slice < nslices; slice++) {
466
        slice_size = bytestream2_get_le32(&gb);
467
468
        setup_lru(lru);
469
470
        ret = check_slice_size(avctx, src, src_size, slice_size, off);
471
        if (ret < 0)
472
            return ret;
473
474
        if ((ret = init_get_bits8(&gb2, src + off + 16, slice_size - 16)) < 0)
475
            return ret;
476
477
        line += decode_slice(&gb2, pic, line, avctx->height - line, lru);
478
479
        off += slice_size;
480
    }
481
482
    if (avctx->height - line) {
483
        avpriv_request_sample(avctx, "Not enough slice data available");
484
    }
485
486
    do_vflip(avctx, pic, vflipped);
487
488
    return 0;
489
}
490
491
av_always_inline
492
static int dx2_decode_slice_5x5(GetBitContext *gb, AVFrame *frame,
493
                                int line, int left, uint8_t lru[3][8],
494
                                int is_565)
495
{
496
    int x, y;
497
    int r, g, b;
498
    int width    = frame->width;
499
    int stride   = frame->linesize[0];
500
    uint8_t *dst = frame->data[0] + stride * line;
501
502
    for (y = 0; y < left && get_bits_left(gb) >= 3 * width; y++) {
503
        for (x = 0; x < width; x++) {
504
            b = decode_sym_565(gb, lru[0], 5);
505
            g = decode_sym_565(gb, lru[1], is_565 ? 6 : 5);
506
            r = decode_sym_565(gb, lru[2], 5);
507
            dst[x * 3 + 0] = (r << 3) | (r >> 2);
508
            dst[x * 3 + 1] = is_565 ? (g << 2) | (g >> 4) : (g << 3) | (g >> 2);
509
            dst[x * 3 + 2] = (b << 3) | (b >> 2);
510
        }
511
512
        dst += stride;
513
    }
514
515
    return y;
516
}
517
518
static void setup_lru_555(uint8_t lru[3][8])
519
{
520
    memcpy(lru[0], def_lru_555, 8 * sizeof(*def_lru));
521
    memcpy(lru[1], def_lru_555, 8 * sizeof(*def_lru));
522
    memcpy(lru[2], def_lru_555, 8 * sizeof(*def_lru));
523
}
524
525
static void setup_lru_565(uint8_t lru[3][8])
526
{
527
    memcpy(lru[0], def_lru_555, 8 * sizeof(*def_lru));
528
    memcpy(lru[1], def_lru_565, 8 * sizeof(*def_lru));
529
    memcpy(lru[2], def_lru_555, 8 * sizeof(*def_lru));
530
}
531
532
static int dx2_decode_slice_555(GetBitContext *gb, AVFrame *frame,
533
                                int line, int left, uint8_t lru[3][8])
534
{
535
    return dx2_decode_slice_5x5(gb, frame, line, left, lru, 0);
536
}
537
538
static int dx2_decode_slice_565(GetBitContext *gb, AVFrame *frame,
539
                                int line, int left, uint8_t lru[3][8])
540
{
541
    return dx2_decode_slice_5x5(gb, frame, line, left, lru, 1);
542
}
543
544
static int dxtory_decode_v2_565(AVCodecContext *avctx, AVFrame *pic,
545
                                const uint8_t *src, int src_size, int is_565,
546
                                uint32_t vflipped)
547
{
548
    enum AVPixelFormat fmt = AV_PIX_FMT_RGB24;
549
    if (is_565)
550
        return dxtory_decode_v2(avctx, pic, src, src_size,
551
                                dx2_decode_slice_565,
552
                                setup_lru_565,
553
                                fmt, vflipped);
554
    else
555
        return dxtory_decode_v2(avctx, pic, src, src_size,
556
                                dx2_decode_slice_555,
557
                                setup_lru_555,
558
                                fmt, vflipped);
559
}
560
561
static int dx2_decode_slice_rgb(GetBitContext *gb, AVFrame *frame,
562
                                int line, int left, uint8_t lru[3][8])
563
{
564
    int x, y;
565
    int width    = frame->width;
566
    int stride   = frame->linesize[0];
567
    uint8_t *dst = frame->data[0] + stride * line;
568
569
    for (y = 0; y < left && get_bits_left(gb) >= 3 * width; y++) {
570
        for (x = 0; x < width; x++) {
571
            dst[x * 3 + 0] = decode_sym(gb, lru[0]);
572
            dst[x * 3 + 1] = decode_sym(gb, lru[1]);
573
            dst[x * 3 + 2] = decode_sym(gb, lru[2]);
574
        }
575
576
        dst += stride;
577
    }
578
579
    return y;
580
}
581
582
static void default_setup_lru(uint8_t lru[3][8])
583
{
584
    int i;
585
586
    for (i = 0; i < 3; i++)
587
        memcpy(lru[i], def_lru, 8 * sizeof(*def_lru));
588
}
589
590
static int dxtory_decode_v2_rgb(AVCodecContext *avctx, AVFrame *pic,
591
                                const uint8_t *src, int src_size,
592
                                uint32_t vflipped)
593
{
594
    return dxtory_decode_v2(avctx, pic, src, src_size,
595
                            dx2_decode_slice_rgb,
596
                            default_setup_lru,
597
                            AV_PIX_FMT_BGR24, vflipped);
598
}
599
600
static int dx2_decode_slice_410(GetBitContext *gb, AVFrame *frame,
601
                                int line, int left,
602
                                uint8_t lru[3][8])
603
{
604
    int x, y, i, j;
605
    int width   = frame->width;
606
607
    int ystride = frame->linesize[0];
608
    int ustride = frame->linesize[1];
609
    int vstride = frame->linesize[2];
610
611
    uint8_t *Y  = frame->data[0] + ystride * line;
612
    uint8_t *U  = frame->data[1] + (ustride >> 2) * line;
613
    uint8_t *V  = frame->data[2] + (vstride >> 2) * line;
614
615
    int h, w, hmargin, vmargin;
616
    int huvborder;
617
618
    h = frame->height & ~3;
619
    w = frame->width  & ~3;
620
    hmargin = frame->width  - w;
621
    vmargin = frame->height - h;
622
    huvborder = AV_CEIL_RSHIFT(frame->width, 2) - 1;
623
624
    for (y = 0; y < left - 3 && get_bits_left(gb) >= 18 * w / 4 + hmargin * 4 + (!!hmargin * 2); y += 4) {
625
        for (x = 0; x < w; x += 4) {
626
            for (j = 0; j < 4; j++)
627
                for (i = 0; i < 4; i++)
628
                    Y[x + i + j * ystride] = decode_sym(gb, lru[0]);
629
            U[x >> 2] = decode_sym(gb, lru[1]) ^ 0x80;
630
            V[x >> 2] = decode_sym(gb, lru[2]) ^ 0x80;
631
        }
632
        if (hmargin) {
633
            for (j = 0; j < 4; j++)
634
                for (i = 0; i < hmargin; i++)
635
                    Y[x + i + j * ystride] = decode_sym(gb, lru[0]);
636
            U[huvborder] = decode_sym(gb, lru[1]) ^ 0x80;
637
            V[huvborder] = decode_sym(gb, lru[2]) ^ 0x80;
638
        }
639
640
        Y += ystride * 4;
641
        U += ustride;
642
        V += vstride;
643
    }
644
645
    if (vmargin && y + vmargin == left) {
646
        for (x = 0; x < width; x += 4) {
647
            for (j = 0; j < vmargin; j++)
648
                for (i = 0; i < 4; i++)
649
                    Y[x + i + j * ystride] = decode_sym(gb, lru[0]);
650
            U[x >> 2] = decode_sym(gb, lru[1]) ^ 0x80;
651
            V[x >> 2] = decode_sym(gb, lru[2]) ^ 0x80;
652
        }
653
        if (hmargin) {
654
            for (j = 0; j < vmargin; j++) {
655
                for (i = 0; i < hmargin; i++)
656
                    Y[x + i + j * ystride] = decode_sym(gb, lru[0]);
657
            }
658
            U[huvborder] = decode_sym(gb, lru[1]) ^ 0x80;
659
            V[huvborder] = decode_sym(gb, lru[2]) ^ 0x80;
660
        }
661
662
        y += vmargin;
663
    }
664
665
    return y;
666
}
667
668
669
static int dxtory_decode_v2_410(AVCodecContext *avctx, AVFrame *pic,
670
                                const uint8_t *src, int src_size,
671
                                uint32_t vflipped)
672
{
673
    return dxtory_decode_v2(avctx, pic, src, src_size,
674
                            dx2_decode_slice_410,
675
                            default_setup_lru,
676
                            AV_PIX_FMT_YUV410P, vflipped);
677
}
678
679
static int dx2_decode_slice_420(GetBitContext *gb, AVFrame *frame,
680
                                int line, int left,
681
                                uint8_t lru[3][8])
682
{
683
    int x, y;
684
685
    int width    = frame->width;
686
687
    int ystride = frame->linesize[0];
688
    int ustride = frame->linesize[1];
689
    int vstride = frame->linesize[2];
690
691
    uint8_t *Y  = frame->data[0] + ystride * line;
692
    uint8_t *U  = frame->data[1] + (ustride >> 1) * line;
693
    uint8_t *V  = frame->data[2] + (vstride >> 1) * line;
694
695
    int h, w, hmargin, vmargin;
696
    int huvborder;
697
698
    h = frame->height & ~1;
699
    w = frame->width  & ~1;
700
    hmargin = frame->width  - w;
701
    vmargin = frame->height - h;
702
    huvborder = AV_CEIL_RSHIFT(frame->width, 1) - 1;
703
704
    for (y = 0; y < left - 1 && get_bits_left(gb) >= 3 * w + hmargin * 4; y += 2) {
705
        for (x = 0; x < w; x += 2) {
706
            Y[x + 0 + 0 * ystride] = decode_sym(gb, lru[0]);
707
            Y[x + 1 + 0 * ystride] = decode_sym(gb, lru[0]);
708
            Y[x + 0 + 1 * ystride] = decode_sym(gb, lru[0]);
709
            Y[x + 1 + 1 * ystride] = decode_sym(gb, lru[0]);
710
            U[x >> 1] = decode_sym(gb, lru[1]) ^ 0x80;
711
            V[x >> 1] = decode_sym(gb, lru[2]) ^ 0x80;
712
        }
713
        if (hmargin) {
714
            Y[x + 0 * ystride] = decode_sym(gb, lru[0]);
715
            Y[x + 1 * ystride] = decode_sym(gb, lru[0]);
716
            U[huvborder] = decode_sym(gb, lru[1]) ^ 0x80;
717
            V[huvborder] = decode_sym(gb, lru[2]) ^ 0x80;
718
        }
719
720
        Y += ystride * 2;
721
        U += ustride;
722
        V += vstride;
723
    }
724
725
    if (vmargin) {
726
        for (x = 0; x < width; x += 2) {
727
            Y[x + 0]  = decode_sym(gb, lru[0]);
728
            U[x >> 1] = decode_sym(gb, lru[1]) ^ 0x80;
729
            V[x >> 1] = decode_sym(gb, lru[2]) ^ 0x80;
730
        }
731
        if (hmargin) {
732
            Y[x]         = decode_sym(gb, lru[0]);
733
            U[huvborder] = decode_sym(gb, lru[1]) ^ 0x80;
734
            V[huvborder] = decode_sym(gb, lru[2]) ^ 0x80;
735
        }
736
    }
737
738
    return y;
739
}
740
741
static int dxtory_decode_v2_420(AVCodecContext *avctx, AVFrame *pic,
742
                                const uint8_t *src, int src_size,
743
                                uint32_t vflipped)
744
{
745
    return dxtory_decode_v2(avctx, pic, src, src_size,
746
                            dx2_decode_slice_420,
747
                            default_setup_lru,
748
                            AV_PIX_FMT_YUV420P, vflipped);
749
}
750
751
static int dx2_decode_slice_444(GetBitContext *gb, AVFrame *frame,
752
                                int line, int left,
753
                                uint8_t lru[3][8])
754
{
755
    int x, y;
756
757
    int width   = frame->width;
758
759
    int ystride = frame->linesize[0];
760
    int ustride = frame->linesize[1];
761
    int vstride = frame->linesize[2];
762
763
    uint8_t *Y  = frame->data[0] + ystride * line;
764
    uint8_t *U  = frame->data[1] + ustride * line;
765
    uint8_t *V  = frame->data[2] + vstride * line;
766
767
    for (y = 0; y < left && get_bits_left(gb) >= 3 * width; y++) {
768
        for (x = 0; x < width; x++) {
769
            Y[x] = decode_sym(gb, lru[0]);
770
            U[x] = decode_sym(gb, lru[1]) ^ 0x80;
771
            V[x] = decode_sym(gb, lru[2]) ^ 0x80;
772
        }
773
774
        Y += ystride;
775
        U += ustride;
776
        V += vstride;
777
    }
778
779
    return y;
780
}
781
782
static int dxtory_decode_v2_444(AVCodecContext *avctx, AVFrame *pic,
783
                                const uint8_t *src, int src_size,
784
                                uint32_t vflipped)
785
{
786
    return dxtory_decode_v2(avctx, pic, src, src_size,
787
                            dx2_decode_slice_444,
788
                            default_setup_lru,
789
                            AV_PIX_FMT_YUV444P, vflipped);
790
}
791
792
2
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
793
                        AVPacket *avpkt)
794
{
795
2
    AVFrame *pic = data;
796
2
    const uint8_t *src = avpkt->data;
797
    uint32_t type;
798
    int vflipped, ret;
799
800
2
    if (avpkt->size < 16) {
801
        av_log(avctx, AV_LOG_ERROR, "packet too small\n");
802
        return AVERROR_INVALIDDATA;
803
    }
804
805
2
    type = AV_RB32(src);
806
2
    vflipped = !!(type & 0x20);
807
808



2
    switch (type) {
809
    case 0x01000021:
810
    case 0x01000001:
811
        ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
812
                                   AV_PIX_FMT_BGR24, 3, vflipped);
813
        break;
814
    case 0x01000029:
815
    case 0x01000009:
816
        ret = dxtory_decode_v2_rgb(avctx, pic, src + 16, avpkt->size - 16, vflipped);
817
        break;
818
2
    case 0x02000021:
819
    case 0x02000001:
820
2
        ret = dxtory_decode_v1_420(avctx, pic, src + 16, avpkt->size - 16, vflipped);
821
2
        break;
822
    case 0x02000029:
823
    case 0x02000009:
824
        ret = dxtory_decode_v2_420(avctx, pic, src + 16, avpkt->size - 16, vflipped);
825
        break;
826
    case 0x03000021:
827
    case 0x03000001:
828
        ret = dxtory_decode_v1_410(avctx, pic, src + 16, avpkt->size - 16, vflipped);
829
        break;
830
    case 0x03000029:
831
    case 0x03000009:
832
        ret = dxtory_decode_v2_410(avctx, pic, src + 16, avpkt->size - 16, vflipped);
833
        break;
834
    case 0x04000021:
835
    case 0x04000001:
836
        ret = dxtory_decode_v1_444(avctx, pic, src + 16, avpkt->size - 16, vflipped);
837
        break;
838
    case 0x04000029:
839
    case 0x04000009:
840
        ret = dxtory_decode_v2_444(avctx, pic, src + 16, avpkt->size - 16, vflipped);
841
        break;
842
    case 0x17000021:
843
    case 0x17000001:
844
        ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
845
                                   AV_PIX_FMT_RGB565LE, 2, vflipped);
846
        break;
847
    case 0x17000029:
848
    case 0x17000009:
849
        ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 1, vflipped);
850
        break;
851
    case 0x18000021:
852
    case 0x19000021:
853
    case 0x18000001:
854
    case 0x19000001:
855
        ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
856
                                   AV_PIX_FMT_RGB555LE, 2, vflipped);
857
        break;
858
    case 0x18000029:
859
    case 0x19000029:
860
    case 0x18000009:
861
    case 0x19000009:
862
        ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 0, vflipped);
863
        break;
864
    default:
865
        avpriv_request_sample(avctx, "Frame header %"PRIX32, type);
866
        return AVERROR_PATCHWELCOME;
867
    }
868
869
2
    if (ret)
870
        return ret;
871
872
2
    pic->pict_type = AV_PICTURE_TYPE_I;
873
2
    pic->key_frame = 1;
874
2
    *got_frame = 1;
875
876
2
    return avpkt->size;
877
}
878
879
AVCodec ff_dxtory_decoder = {
880
    .name           = "dxtory",
881
    .long_name      = NULL_IF_CONFIG_SMALL("Dxtory"),
882
    .type           = AVMEDIA_TYPE_VIDEO,
883
    .id             = AV_CODEC_ID_DXTORY,
884
    .decode         = decode_frame,
885
    .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
886
};