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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / dxtory.c
CommitLineData
2ba45a60
DM		 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#define BITSTREAM_READER_LE
26#include "avcodec.h"
27#include "bytestream.h"
28#include "get_bits.h"
29#include "internal.h"
30#include "unary.h"
31#include "libavutil/common.h"
32#include "libavutil/intreadwrite.h"
33
34static int dxtory_decode_v1_rgb(AVCodecContext *avctx, AVFrame *pic,
35 const uint8_t *src, int src_size,
36 int id, int bpp)
37{
38 int h;
39 uint8_t *dst;
40 int ret;
41
42 if (src_size < avctx->width * avctx->height * (int64_t)bpp) {
43 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
44 return AVERROR_INVALIDDATA;
45 }
46
47 avctx->pix_fmt = id;
48 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
49 return ret;
50
51 dst = pic->data[0];
52 for (h = 0; h < avctx->height; h++) {
53 memcpy(dst, src, avctx->width * bpp);
54 src += avctx->width * bpp;
55 dst += pic->linesize[0];
56 }
57
58 return 0;
59}
60
61static int dxtory_decode_v1_410(AVCodecContext *avctx, AVFrame *pic,
62 const uint8_t *src, int src_size)
63{
64 int h, w;
65 uint8_t *Y1, *Y2, *Y3, *Y4, *U, *V;
66 int ret;
67
68 if (src_size < avctx->width * avctx->height * 9L / 8) {
69 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
70 return AVERROR_INVALIDDATA;
71 }
72
73 avctx->pix_fmt = AV_PIX_FMT_YUV410P;
74 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
75 return ret;
76
77 Y1 = pic->data[0];
78 Y2 = pic->data[0] + pic->linesize[0];
79 Y3 = pic->data[0] + pic->linesize[0] * 2;
80 Y4 = pic->data[0] + pic->linesize[0] * 3;
81 U = pic->data[1];
82 V = pic->data[2];
83 for (h = 0; h < avctx->height; h += 4) {
84 for (w = 0; w < avctx->width; w += 4) {
85 AV_COPY32(Y1 + w, src);
86 AV_COPY32(Y2 + w, src + 4);
87 AV_COPY32(Y3 + w, src + 8);
88 AV_COPY32(Y4 + w, src + 12);
89 U[w >> 2] = src[16] + 0x80;
90 V[w >> 2] = src[17] + 0x80;
91 src += 18;
92 }
93 Y1 += pic->linesize[0] << 2;
94 Y2 += pic->linesize[0] << 2;
95 Y3 += pic->linesize[0] << 2;
96 Y4 += pic->linesize[0] << 2;
97 U += pic->linesize[1];
98 V += pic->linesize[2];
99 }
100
101 return 0;
102}
103
104static int dxtory_decode_v1_420(AVCodecContext *avctx, AVFrame *pic,
105 const uint8_t *src, int src_size)
106{
107 int h, w;
108 uint8_t *Y1, *Y2, *U, *V;
109 int ret;
110
111 if (src_size < avctx->width * avctx->height * 3L / 2) {
112 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
113 return AVERROR_INVALIDDATA;
114 }
115
116 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
117 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
118 return ret;
119
120 Y1 = pic->data[0];
121 Y2 = pic->data[0] + pic->linesize[0];
122 U = pic->data[1];
123 V = pic->data[2];
124 for (h = 0; h < avctx->height; h += 2) {
125 for (w = 0; w < avctx->width; w += 2) {
126 AV_COPY16(Y1 + w, src);
127 AV_COPY16(Y2 + w, src + 2);
128 U[w >> 1] = src[4] + 0x80;
129 V[w >> 1] = src[5] + 0x80;
130 src += 6;
131 }
132 Y1 += pic->linesize[0] << 1;
133 Y2 += pic->linesize[0] << 1;
134 U += pic->linesize[1];
135 V += pic->linesize[2];
136 }
137
138 return 0;
139}
140
141static int dxtory_decode_v1_444(AVCodecContext *avctx, AVFrame *pic,
142 const uint8_t *src, int src_size)
143{
144 int h, w;
145 uint8_t *Y, *U, *V;
146 int ret;
147
148 if (src_size < avctx->width * avctx->height * 3L) {
149 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
150 return AVERROR_INVALIDDATA;
151 }
152
153 avctx->pix_fmt = AV_PIX_FMT_YUV444P;
154 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
155 return ret;
156
157 Y = pic->data[0];
158 U = pic->data[1];
159 V = pic->data[2];
160 for (h = 0; h < avctx->height; h++) {
161 for (w = 0; w < avctx->width; w++) {
162 Y[w] = *src++;
163 U[w] = *src++ ^ 0x80;
164 V[w] = *src++ ^ 0x80;
165 }
166 Y += pic->linesize[0];
167 U += pic->linesize[1];
168 V += pic->linesize[2];
169 }
170
171 return 0;
172}
173
174static const uint8_t def_lru[8] = { 0x00, 0x20, 0x40, 0x60, 0x80, 0xA0, 0xC0, 0xFF };
175static const uint8_t def_lru_555[8] = { 0x00, 0x08, 0x10, 0x18, 0x1F };
176static const uint8_t def_lru_565[8] = { 0x00, 0x08, 0x10, 0x20, 0x30, 0x3F };
177
178static inline uint8_t decode_sym(GetBitContext *gb, uint8_t lru[8])
179{
180 uint8_t c, val;
181
182 c = get_unary(gb, 0, 8);
183 if (!c) {
184 val = get_bits(gb, 8);
185 memmove(lru + 1, lru, sizeof(*lru) * (8 - 1));
186 } else {
187 val = lru[c - 1];
188 memmove(lru + 1, lru, sizeof(*lru) * (c - 1));
189 }
190 lru[0] = val;
191
192 return val;
193}
194
195static inline uint8_t decode_sym_565(GetBitContext *gb, uint8_t lru[8],
196 int bits)
197{
198 uint8_t c, val;
199
200 c = get_unary(gb, 0, bits);
201 if (!c) {
202 val = get_bits(gb, bits);
203 memmove(lru + 1, lru, sizeof(*lru) * (6 - 1));
204 } else {
205 val = lru[c - 1];
206 memmove(lru + 1, lru, sizeof(*lru) * (c - 1));
207 }
208 lru[0] = val;
209
210 return val;
211}
212
213static int dx2_decode_slice_565(GetBitContext *gb, int width, int height,
214 uint8_t *dst, int stride, int is_565)
215{
216 int x, y;
217 int r, g, b;
218 uint8_t lru[3][8];
219
220 memcpy(lru[0], def_lru_555, 8 * sizeof(*def_lru));
221 memcpy(lru[1], is_565 ? def_lru_565 : def_lru_555, 8 * sizeof(*def_lru));
222 memcpy(lru[2], def_lru_555, 8 * sizeof(*def_lru));
223
224 for (y = 0; y < height; y++) {
225 for (x = 0; x < width; x++) {
226 b = decode_sym_565(gb, lru[0], 5);
227 g = decode_sym_565(gb, lru[1], is_565 ? 6 : 5);
228 r = decode_sym_565(gb, lru[2], 5);
229 dst[x * 3 + 0] = (r << 3) | (r >> 2);
230 dst[x * 3 + 1] = is_565 ? (g << 2) | (g >> 4) : (g << 3) | (g >> 2);
231 dst[x * 3 + 2] = (b << 3) | (b >> 2);
232 }
233
234 dst += stride;
235 }
236
237 return 0;
238}
239
240static int dxtory_decode_v2_565(AVCodecContext *avctx, AVFrame *pic,
241 const uint8_t *src, int src_size, int is_565)
242{
243 GetByteContext gb;
244 GetBitContext gb2;
245 int nslices, slice, slice_height;
246 uint32_t off, slice_size;
247 uint8_t *dst;
248 int ret;
249
250 bytestream2_init(&gb, src, src_size);
251 nslices = bytestream2_get_le16(&gb);
252 off = FFALIGN(nslices * 4 + 2, 16);
253 if (src_size < off) {
254 av_log(avctx, AV_LOG_ERROR, "no slice data\n");
255 return AVERROR_INVALIDDATA;
256 }
257
258 if (!nslices || avctx->height % nslices) {
259 avpriv_request_sample(avctx, "%d slices for %dx%d", nslices,
260 avctx->width, avctx->height);
261 return AVERROR_PATCHWELCOME;
262 }
263
264 slice_height = avctx->height / nslices;
265 avctx->pix_fmt = AV_PIX_FMT_RGB24;
266 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
267 return ret;
268
269 dst = pic->data[0];
270 for (slice = 0; slice < nslices; slice++) {
271 slice_size = bytestream2_get_le32(&gb);
272 if (slice_size > src_size - off) {
273 av_log(avctx, AV_LOG_ERROR,
274 "invalid slice size %"PRIu32" (only %"PRIu32" bytes left)\n",
275 slice_size, src_size - off);
276 return AVERROR_INVALIDDATA;
277 }
278 if (slice_size <= 16) {
279 av_log(avctx, AV_LOG_ERROR, "invalid slice size %"PRIu32"\n", slice_size);
280 return AVERROR_INVALIDDATA;
281 }
282
283 if (AV_RL32(src + off) != slice_size - 16) {
284 av_log(avctx, AV_LOG_ERROR,
285 "Slice sizes mismatch: got %"PRIu32" instead of %"PRIu32"\n",
286 AV_RL32(src + off), slice_size - 16);
287 }
288 init_get_bits(&gb2, src + off + 16, (slice_size - 16) * 8);
289 dx2_decode_slice_565(&gb2, avctx->width, slice_height, dst,
290 pic->linesize[0], is_565);
291
292 dst += pic->linesize[0] * slice_height;
293 off += slice_size;
294 }
295
296 return 0;
297}
298
299static int dx2_decode_slice_rgb(GetBitContext *gb, int width, int height,
300 uint8_t *dst, int stride)
301{
302 int x, y, i;
303 uint8_t lru[3][8];
304
305 for (i = 0; i < 3; i++)
306 memcpy(lru[i], def_lru, 8 * sizeof(*def_lru));
307
308 for (y = 0; y < height; y++) {
309 for (x = 0; x < width; x++) {
310 dst[x * 3 + 0] = decode_sym(gb, lru[0]);
311 dst[x * 3 + 1] = decode_sym(gb, lru[1]);
312 dst[x * 3 + 2] = decode_sym(gb, lru[2]);
313 }
314
315 dst += stride;
316 }
317
318 return 0;
319}
320
321static int dxtory_decode_v2_rgb(AVCodecContext *avctx, AVFrame *pic,
322 const uint8_t *src, int src_size)
323{
324 GetByteContext gb;
325 GetBitContext gb2;
326 int nslices, slice, slice_height;
327 uint32_t off, slice_size;
328 uint8_t *dst;
329 int ret;
330
331 bytestream2_init(&gb, src, src_size);
332 nslices = bytestream2_get_le16(&gb);
333 off = FFALIGN(nslices * 4 + 2, 16);
334 if (src_size < off) {
335 av_log(avctx, AV_LOG_ERROR, "no slice data\n");
336 return AVERROR_INVALIDDATA;
337 }
338
339 if (!nslices || avctx->height % nslices) {
340 avpriv_request_sample(avctx, "%d slices for %dx%d", nslices,
341 avctx->width, avctx->height);
342 return AVERROR_PATCHWELCOME;
343 }
344
345 slice_height = avctx->height / nslices;
346 avctx->pix_fmt = AV_PIX_FMT_BGR24;
347 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
348 return ret;
349
350 dst = pic->data[0];
351 for (slice = 0; slice < nslices; slice++) {
352 slice_size = bytestream2_get_le32(&gb);
353 if (slice_size > src_size - off) {
354 av_log(avctx, AV_LOG_ERROR,
355 "invalid slice size %"PRIu32" (only %"PRIu32" bytes left)\n",
356 slice_size, src_size - off);
357 return AVERROR_INVALIDDATA;
358 }
359 if (slice_size <= 16) {
360 av_log(avctx, AV_LOG_ERROR, "invalid slice size %"PRIu32"\n",
361 slice_size);
362 return AVERROR_INVALIDDATA;
363 }
364
365 if (AV_RL32(src + off) != slice_size - 16) {
366 av_log(avctx, AV_LOG_ERROR,
367 "Slice sizes mismatch: got %"PRIu32" instead of %"PRIu32"\n",
368 AV_RL32(src + off), slice_size - 16);
369 }
370 init_get_bits(&gb2, src + off + 16, (slice_size - 16) * 8);
371 dx2_decode_slice_rgb(&gb2, avctx->width, slice_height, dst,
372 pic->linesize[0]);
373
374 dst += pic->linesize[0] * slice_height;
375 off += slice_size;
376 }
377
378 return 0;
379}
380
381static int dx2_decode_slice_410(GetBitContext *gb, int width, int height,
382 uint8_t *Y, uint8_t *U, uint8_t *V,
383 int ystride, int ustride, int vstride)
384{
385 int x, y, i, j;
386 uint8_t lru[3][8];
387
388 for (i = 0; i < 3; i++)
389 memcpy(lru[i], def_lru, 8 * sizeof(*def_lru));
390
391 for (y = 0; y < height; y += 4) {
392 for (x = 0; x < width; x += 4) {
393 for (j = 0; j < 4; j++)
394 for (i = 0; i < 4; i++)
395 Y[x + i + j * ystride] = decode_sym(gb, lru[0]);
396 U[x >> 2] = decode_sym(gb, lru[1]) ^ 0x80;
397 V[x >> 2] = decode_sym(gb, lru[2]) ^ 0x80;
398 }
399
400 Y += ystride << 2;
401 U += ustride;
402 V += vstride;
403 }
404
405 return 0;
406}
407
408static int dxtory_decode_v2_410(AVCodecContext *avctx, AVFrame *pic,
409 const uint8_t *src, int src_size)
410{
411 GetByteContext gb;
412 GetBitContext gb2;
413 int nslices, slice, slice_height, ref_slice_height;
414 int cur_y, next_y;
415 uint32_t off, slice_size;
416 uint8_t *Y, *U, *V;
417 int ret;
418
419 bytestream2_init(&gb, src, src_size);
420 nslices = bytestream2_get_le16(&gb);
421 off = FFALIGN(nslices * 4 + 2, 16);
422 if (src_size < off) {
423 av_log(avctx, AV_LOG_ERROR, "no slice data\n");
424 return AVERROR_INVALIDDATA;
425 }
426
427 if (!nslices || avctx->height % nslices) {
428 avpriv_request_sample(avctx, "%d slices for %dx%d", nslices,
429 avctx->width, avctx->height);
430 return AVERROR_PATCHWELCOME;
431 }
432
433 ref_slice_height = avctx->height / nslices;
434 if ((avctx->width & 3) || (avctx->height & 3)) {
435 avpriv_request_sample(avctx, "Frame dimensions %dx%d",
436 avctx->width, avctx->height);
437 }
438
439 avctx->pix_fmt = AV_PIX_FMT_YUV410P;
440 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
441 return ret;
442
443 Y = pic->data[0];
444 U = pic->data[1];
445 V = pic->data[2];
446
447 cur_y = 0;
448 next_y = ref_slice_height;
449 for (slice = 0; slice < nslices; slice++) {
450 slice_size = bytestream2_get_le32(&gb);
451 slice_height = (next_y & ~3) - (cur_y & ~3);
452 if (slice_size > src_size - off) {
453 av_log(avctx, AV_LOG_ERROR,
454 "invalid slice size %"PRIu32" (only %"PRIu32" bytes left)\n",
455 slice_size, src_size - off);
456 return AVERROR_INVALIDDATA;
457 }
458 if (slice_size <= 16) {
459 av_log(avctx, AV_LOG_ERROR, "invalid slice size %"PRIu32"\n", slice_size);
460 return AVERROR_INVALIDDATA;
461 }
462
463 if (AV_RL32(src + off) != slice_size - 16) {
464 av_log(avctx, AV_LOG_ERROR,
465 "Slice sizes mismatch: got %"PRIu32" instead of %"PRIu32"\n",
466 AV_RL32(src + off), slice_size - 16);
467 }
468 init_get_bits(&gb2, src + off + 16, (slice_size - 16) * 8);
469 dx2_decode_slice_410(&gb2, avctx->width, slice_height, Y, U, V,
470 pic->linesize[0], pic->linesize[1],
471 pic->linesize[2]);
472
473 Y += pic->linesize[0] * slice_height;
474 U += pic->linesize[1] * (slice_height >> 2);
475 V += pic->linesize[2] * (slice_height >> 2);
476 off += slice_size;
477 cur_y = next_y;
478 next_y += ref_slice_height;
479 }
480
481 return 0;
482}
483
484static int dx2_decode_slice_420(GetBitContext *gb, int width, int height,
485 uint8_t *Y, uint8_t *U, uint8_t *V,
486 int ystride, int ustride, int vstride)
487{
488 int x, y, i;
489 uint8_t lru[3][8];
490
491 for (i = 0; i < 3; i++)
492 memcpy(lru[i], def_lru, 8 * sizeof(*def_lru));
493
494 for (y = 0; y < height; y+=2) {
495 for (x = 0; x < width; x += 2) {
496 Y[x + 0 + 0 * ystride] = decode_sym(gb, lru[0]);
497 Y[x + 1 + 0 * ystride] = decode_sym(gb, lru[0]);
498 Y[x + 0 + 1 * ystride] = decode_sym(gb, lru[0]);
499 Y[x + 1 + 1 * ystride] = decode_sym(gb, lru[0]);
500 U[x >> 1] = decode_sym(gb, lru[1]) ^ 0x80;
501 V[x >> 1] = decode_sym(gb, lru[2]) ^ 0x80;
502 }
503
504 Y += ystride << 1;
505 U += ustride;
506 V += vstride;
507 }
508
509 return 0;
510}
511
512static int dxtory_decode_v2_420(AVCodecContext *avctx, AVFrame *pic,
513 const uint8_t *src, int src_size)
514{
515 GetByteContext gb;
516 GetBitContext gb2;
517 int nslices, slice, slice_height, ref_slice_height;
518 int cur_y, next_y;
519 uint32_t off, slice_size;
520 uint8_t *Y, *U, *V;
521 int ret;
522
523 bytestream2_init(&gb, src, src_size);
524 nslices = bytestream2_get_le16(&gb);
525 off = FFALIGN(nslices * 4 + 2, 16);
526 if (src_size < off) {
527 av_log(avctx, AV_LOG_ERROR, "no slice data\n");
528 return AVERROR_INVALIDDATA;
529 }
530
531 if (!nslices || avctx->height % nslices) {
532 avpriv_request_sample(avctx, "%d slices for %dx%d", nslices,
533 avctx->width, avctx->height);
534 return AVERROR_PATCHWELCOME;
535 }
536
537 ref_slice_height = avctx->height / nslices;
538 if ((avctx->width & 1) || (avctx->height & 1)) {
539 avpriv_request_sample(avctx, "Frame dimensions %dx%d",
540 avctx->width, avctx->height);
541 }
542
543 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
544 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
545 return ret;
546
547 Y = pic->data[0];
548 U = pic->data[1];
549 V = pic->data[2];
550
551 cur_y = 0;
552 next_y = ref_slice_height;
553 for (slice = 0; slice < nslices; slice++) {
554 slice_size = bytestream2_get_le32(&gb);
555 slice_height = (next_y & ~1) - (cur_y & ~1);
556 if (slice_size > src_size - off) {
557 av_log(avctx, AV_LOG_ERROR,
558 "invalid slice size %"PRIu32" (only %"PRIu32" bytes left)\n",
559 slice_size, src_size - off);
560 return AVERROR_INVALIDDATA;
561 }
562 if (slice_size <= 16) {
563 av_log(avctx, AV_LOG_ERROR, "invalid slice size %"PRIu32"\n", slice_size);
564 return AVERROR_INVALIDDATA;
565 }
566
567 if (AV_RL32(src + off) != slice_size - 16) {
568 av_log(avctx, AV_LOG_ERROR,
569 "Slice sizes mismatch: got %"PRIu32" instead of %"PRIu32"\n",
570 AV_RL32(src + off), slice_size - 16);
571 }
572 init_get_bits(&gb2, src + off + 16, (slice_size - 16) * 8);
573 dx2_decode_slice_420(&gb2, avctx->width, slice_height, Y, U, V,
574 pic->linesize[0], pic->linesize[1],
575 pic->linesize[2]);
576
577 Y += pic->linesize[0] * slice_height;
578 U += pic->linesize[1] * (slice_height >> 1);
579 V += pic->linesize[2] * (slice_height >> 1);
580 off += slice_size;
581 cur_y = next_y;
582 next_y += ref_slice_height;
583 }
584
585 return 0;
586}
587
588static int dx2_decode_slice_444(GetBitContext *gb, int width, int height,
589 uint8_t *Y, uint8_t *U, uint8_t *V,
590 int ystride, int ustride, int vstride)
591{
592 int x, y, i;
593 uint8_t lru[3][8];
594
595 for (i = 0; i < 3; i++)
596 memcpy(lru[i], def_lru, 8 * sizeof(*def_lru));
597
598 for (y = 0; y < height; y++) {
599 for (x = 0; x < width; x++) {
600 Y[x] = decode_sym(gb, lru[0]);
601 U[x] = decode_sym(gb, lru[1]) ^ 0x80;
602 V[x] = decode_sym(gb, lru[2]) ^ 0x80;
603 }
604
605 Y += ystride;
606 U += ustride;
607 V += vstride;
608 }
609
610 return 0;
611}
612
613static int dxtory_decode_v2_444(AVCodecContext *avctx, AVFrame *pic,
614 const uint8_t *src, int src_size)
615{
616 GetByteContext gb;
617 GetBitContext gb2;
618 int nslices, slice, slice_height;
619 uint32_t off, slice_size;
620 uint8_t *Y, *U, *V;
621 int ret;
622
623 bytestream2_init(&gb, src, src_size);
624 nslices = bytestream2_get_le16(&gb);
625 off = FFALIGN(nslices * 4 + 2, 16);
626 if (src_size < off) {
627 av_log(avctx, AV_LOG_ERROR, "no slice data\n");
628 return AVERROR_INVALIDDATA;
629 }
630
631 if (!nslices || avctx->height % nslices) {
632 avpriv_request_sample(avctx, "%d slices for %dx%d", nslices,
633 avctx->width, avctx->height);
634 return AVERROR_PATCHWELCOME;
635 }
636
637 slice_height = avctx->height / nslices;
638
639 avctx->pix_fmt = AV_PIX_FMT_YUV444P;
640 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
641 return ret;
642
643 Y = pic->data[0];
644 U = pic->data[1];
645 V = pic->data[2];
646
647 for (slice = 0; slice < nslices; slice++) {
648 slice_size = bytestream2_get_le32(&gb);
649 if (slice_size > src_size - off) {
650 av_log(avctx, AV_LOG_ERROR,
651 "invalid slice size %"PRIu32" (only %"PRIu32" bytes left)\n",
652 slice_size, src_size - off);
653 return AVERROR_INVALIDDATA;
654 }
655 if (slice_size <= 16) {
656 av_log(avctx, AV_LOG_ERROR, "invalid slice size %"PRIu32"\n", slice_size);
657 return AVERROR_INVALIDDATA;
658 }
659
660 if (AV_RL32(src + off) != slice_size - 16) {
661 av_log(avctx, AV_LOG_ERROR,
662 "Slice sizes mismatch: got %"PRIu32" instead of %"PRIu32"\n",
663 AV_RL32(src + off), slice_size - 16);
664 }
665 init_get_bits(&gb2, src + off + 16, (slice_size - 16) * 8);
666 dx2_decode_slice_444(&gb2, avctx->width, slice_height, Y, U, V,
667 pic->linesize[0], pic->linesize[1],
668 pic->linesize[2]);
669
670 Y += pic->linesize[0] * slice_height;
671 U += pic->linesize[1] * slice_height;
672 V += pic->linesize[2] * slice_height;
673 off += slice_size;
674 }
675
676 return 0;
677}
678
679static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
680 AVPacket *avpkt)
681{
682 AVFrame *pic = data;
683 const uint8_t *src = avpkt->data;
684 int ret;
685
686 if (avpkt->size < 16) {
687 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
688 return AVERROR_INVALIDDATA;
689 }
690
691 switch (AV_RB32(src)) {
692 case 0x01000001:
693 ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
694 AV_PIX_FMT_BGR24, 3);
695 break;
696 case 0x01000009:
697 ret = dxtory_decode_v2_rgb(avctx, pic, src + 16, avpkt->size - 16);
698 break;
699 case 0x02000001:
700 ret = dxtory_decode_v1_420(avctx, pic, src + 16, avpkt->size - 16);
701 break;
702 case 0x02000009:
703 ret = dxtory_decode_v2_420(avctx, pic, src + 16, avpkt->size - 16);
704 break;
705 case 0x03000001:
706 ret = dxtory_decode_v1_410(avctx, pic, src + 16, avpkt->size - 16);
707 break;
708 case 0x03000009:
709 ret = dxtory_decode_v2_410(avctx, pic, src + 16, avpkt->size - 16);
710 break;
711 case 0x04000001:
712 ret = dxtory_decode_v1_444(avctx, pic, src + 16, avpkt->size - 16);
713 break;
714 case 0x04000009:
715 ret = dxtory_decode_v2_444(avctx, pic, src + 16, avpkt->size - 16);
716 break;
717 case 0x17000001:
718 ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
719 AV_PIX_FMT_RGB565LE, 2);
720 break;
721 case 0x17000009:
722 ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 1);
723 break;
724 case 0x18000001:
725 case 0x19000001:
726 ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
727 AV_PIX_FMT_RGB555LE, 2);
728 break;
729 case 0x18000009:
730 case 0x19000009:
731 ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 0);
732 break;
733 default:
734 avpriv_request_sample(avctx, "Frame header %"PRIX32, AV_RB32(src));
735 return AVERROR_PATCHWELCOME;
736 }
737
738 if (ret)
739 return ret;
740
741 pic->pict_type = AV_PICTURE_TYPE_I;
742 pic->key_frame = 1;
743 *got_frame = 1;
744
745 return avpkt->size;
746}
747
748AVCodec ff_dxtory_decoder = {
749 .name = "dxtory",
750 .long_name = NULL_IF_CONFIG_SMALL("Dxtory"),
751 .type = AVMEDIA_TYPE_VIDEO,
752 .id = AV_CODEC_ID_DXTORY,
753 .decode = decode_frame,
754 .capabilities = CODEC_CAP_DR1,
755};
ffmpeg Piment Noir Debian package repository