FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/dxtory.c
Date: 2021-09-23 20:34:37
Exec Total Coverage
Lines: 52 475 10.9%
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
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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
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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
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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
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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
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722 for (h = 0; h < height; h += 2) {
253
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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
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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] * 2;
268 720 Y2 += pic->linesize[0] * 2;
269 720 U += pic->linesize[1];
270 720 V += pic->linesize[2];
271 }
272
273
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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
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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
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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
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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 const 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 };
887