summaryrefslogtreecommitdiff
path: root/libavcodec/dxtory.c (plain)
blob: 6f8652ad499db66b6c3ed08ad05b0bd8d8b5456c
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
35static int dxtory_decode_v1_rgb(AVCodecContext *avctx, AVFrame *pic,
36 const uint8_t *src, int src_size,
37 int id, int bpp)
38{
39 int h;
40 uint8_t *dst;
41 int ret;
42
43 if (src_size < avctx->width * avctx->height * (int64_t)bpp) {
44 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
45 return AVERROR_INVALIDDATA;
46 }
47
48 avctx->pix_fmt = id;
49 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
50 return ret;
51
52 dst = pic->data[0];
53 for (h = 0; h < avctx->height; h++) {
54 memcpy(dst, src, avctx->width * bpp);
55 src += avctx->width * bpp;
56 dst += pic->linesize[0];
57 }
58
59 return 0;
60}
61
62static int dxtory_decode_v1_410(AVCodecContext *avctx, AVFrame *pic,
63 const uint8_t *src, int src_size)
64{
65 int h, w;
66 uint8_t *Y1, *Y2, *Y3, *Y4, *U, *V;
67 int ret;
68
69 if (src_size < FFALIGN(avctx->width, 4) * FFALIGN(avctx->height, 4) * 9LL / 8) {
70 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
71 return AVERROR_INVALIDDATA;
72 }
73
74 avctx->pix_fmt = AV_PIX_FMT_YUV410P;
75 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
76 return ret;
77
78 Y1 = pic->data[0];
79 Y2 = pic->data[0] + pic->linesize[0];
80 Y3 = pic->data[0] + pic->linesize[0] * 2;
81 Y4 = pic->data[0] + pic->linesize[0] * 3;
82 U = pic->data[1];
83 V = pic->data[2];
84 for (h = 0; h < avctx->height; h += 4) {
85 for (w = 0; w < avctx->width; w += 4) {
86 AV_COPY32U(Y1 + w, src);
87 AV_COPY32U(Y2 + w, src + 4);
88 AV_COPY32U(Y3 + w, src + 8);
89 AV_COPY32U(Y4 + w, src + 12);
90 U[w >> 2] = src[16] + 0x80;
91 V[w >> 2] = src[17] + 0x80;
92 src += 18;
93 }
94 Y1 += pic->linesize[0] << 2;
95 Y2 += pic->linesize[0] << 2;
96 Y3 += pic->linesize[0] << 2;
97 Y4 += pic->linesize[0] << 2;
98 U += pic->linesize[1];
99 V += pic->linesize[2];
100 }
101
102 return 0;
103}
104
105static int dxtory_decode_v1_420(AVCodecContext *avctx, AVFrame *pic,
106 const uint8_t *src, int src_size)
107{
108 int h, w;
109 uint8_t *Y1, *Y2, *U, *V;
110 int ret;
111
112 if (src_size < FFALIGN(avctx->width, 2) * FFALIGN(avctx->height, 2) * 3LL / 2) {
113 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
114 return AVERROR_INVALIDDATA;
115 }
116
117 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
118 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
119 return ret;
120
121 Y1 = pic->data[0];
122 Y2 = pic->data[0] + pic->linesize[0];
123 U = pic->data[1];
124 V = pic->data[2];
125 for (h = 0; h < avctx->height; h += 2) {
126 for (w = 0; w < avctx->width; w += 2) {
127 AV_COPY16(Y1 + w, src);
128 AV_COPY16(Y2 + w, src + 2);
129 U[w >> 1] = src[4] + 0x80;
130 V[w >> 1] = src[5] + 0x80;
131 src += 6;
132 }
133 Y1 += pic->linesize[0] << 1;
134 Y2 += pic->linesize[0] << 1;
135 U += pic->linesize[1];
136 V += pic->linesize[2];
137 }
138
139 return 0;
140}
141
142static int dxtory_decode_v1_444(AVCodecContext *avctx, AVFrame *pic,
143 const uint8_t *src, int src_size)
144{
145 int h, w;
146 uint8_t *Y, *U, *V;
147 int ret;
148
149 if (src_size < avctx->width * avctx->height * 3LL) {
150 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
151 return AVERROR_INVALIDDATA;
152 }
153
154 avctx->pix_fmt = AV_PIX_FMT_YUV444P;
155 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
156 return ret;
157
158 Y = pic->data[0];
159 U = pic->data[1];
160 V = pic->data[2];
161 for (h = 0; h < avctx->height; h++) {
162 for (w = 0; w < avctx->width; w++) {
163 Y[w] = *src++;
164 U[w] = *src++ ^ 0x80;
165 V[w] = *src++ ^ 0x80;
166 }
167 Y += pic->linesize[0];
168 U += pic->linesize[1];
169 V += pic->linesize[2];
170 }
171
172 return 0;
173}
174
175static const uint8_t def_lru[8] = { 0x00, 0x20, 0x40, 0x60, 0x80, 0xA0, 0xC0, 0xFF };
176static const uint8_t def_lru_555[8] = { 0x00, 0x08, 0x10, 0x18, 0x1F };
177static const uint8_t def_lru_565[8] = { 0x00, 0x08, 0x10, 0x20, 0x30, 0x3F };
178
179static inline uint8_t decode_sym(GetBitContext *gb, uint8_t lru[8])
180{
181 uint8_t c, val;
182
183 c = get_unary(gb, 0, 8);
184 if (!c) {
185 val = get_bits(gb, 8);
186 memmove(lru + 1, lru, sizeof(*lru) * (8 - 1));
187 } else {
188 val = lru[c - 1];
189 memmove(lru + 1, lru, sizeof(*lru) * (c - 1));
190 }
191 lru[0] = val;
192
193 return val;
194}
195
196static int check_slice_size(AVCodecContext *avctx,
197 const uint8_t *src, int src_size,
198 int slice_size, int off)
199{
200 int cur_slice_size;
201
202 if (slice_size > src_size - off) {
203 av_log(avctx, AV_LOG_ERROR,
204 "invalid slice size %d (only %d bytes left)\n",
205 slice_size, src_size - off);
206 return AVERROR_INVALIDDATA;
207 }
208 if (slice_size <= 16) {
209 av_log(avctx, AV_LOG_ERROR, "invalid slice size %d\n",
210 slice_size);
211 return AVERROR_INVALIDDATA;
212 }
213
214 cur_slice_size = AV_RL32(src + off);
215 if (cur_slice_size != slice_size - 16) {
216 av_log(avctx, AV_LOG_ERROR,
217 "Slice sizes mismatch: got %d instead of %d\n",
218 cur_slice_size, slice_size - 16);
219 }
220
221 return 0;
222}
223
224static int load_buffer(AVCodecContext *avctx,
225 const uint8_t *src, int src_size,
226 GetByteContext *gb,
227 int *nslices, int *off)
228{
229 bytestream2_init(gb, src, src_size);
230 *nslices = bytestream2_get_le16(gb);
231 *off = FFALIGN(*nslices * 4 + 2, 16);
232 if (src_size < *off) {
233 av_log(avctx, AV_LOG_ERROR, "no slice data\n");
234 return AVERROR_INVALIDDATA;
235 }
236
237 if (!*nslices) {
238 avpriv_request_sample(avctx, "%d slices for %dx%d", *nslices,
239 avctx->width, avctx->height);
240 return AVERROR_PATCHWELCOME;
241 }
242
243 return 0;
244}
245
246static inline uint8_t decode_sym_565(GetBitContext *gb, uint8_t lru[8],
247 int bits)
248{
249 uint8_t c, val;
250
251 c = get_unary(gb, 0, bits);
252 if (!c) {
253 val = get_bits(gb, bits);
254 memmove(lru + 1, lru, sizeof(*lru) * (6 - 1));
255 } else {
256 val = lru[c - 1];
257 memmove(lru + 1, lru, sizeof(*lru) * (c - 1));
258 }
259 lru[0] = val;
260
261 return val;
262}
263
264typedef int (*decode_slice_func)(GetBitContext *gb, AVFrame *frame,
265 int line, int height, uint8_t lru[3][8]);
266
267typedef void (*setup_lru_func)(uint8_t lru[3][8]);
268
269static int dxtory_decode_v2(AVCodecContext *avctx, AVFrame *pic,
270 const uint8_t *src, int src_size,
271 decode_slice_func decode_slice,
272 setup_lru_func setup_lru,
273 enum AVPixelFormat fmt)
274{
275 GetByteContext gb;
276 GetBitContext gb2;
277 int nslices, slice, line = 0;
278 uint32_t off, slice_size;
279 uint8_t lru[3][8];
280 int ret;
281
282 ret = load_buffer(avctx, src, src_size, &gb, &nslices, &off);
283 if (ret < 0)
284 return ret;
285
286 avctx->pix_fmt = fmt;
287 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
288 return ret;
289
290 for (slice = 0; slice < nslices; slice++) {
291 slice_size = bytestream2_get_le32(&gb);
292
293 setup_lru(lru);
294
295 ret = check_slice_size(avctx, src, src_size, slice_size, off);
296 if (ret < 0)
297 return ret;
298
299 if ((ret = init_get_bits8(&gb2, src + off + 16, slice_size - 16)) < 0)
300 return ret;
301
302 line += decode_slice(&gb2, pic, line, avctx->height - line, lru);
303
304 off += slice_size;
305 }
306
307 if (avctx->height - line) {
308 av_log(avctx, AV_LOG_VERBOSE,
309 "Not enough slice data available, "
310 "cropping the frame by %d pixels\n",
311 avctx->height - line);
312 avctx->height = line;
313 }
314
315 return 0;
316}
317
318av_always_inline
319static int dx2_decode_slice_5x5(GetBitContext *gb, AVFrame *frame,
320 int line, int left, uint8_t lru[3][8],
321 int is_565)
322{
323 int x, y;
324 int r, g, b;
325 int width = frame->width;
326 int stride = frame->linesize[0];
327 uint8_t *dst = frame->data[0] + stride * line;
328
329 for (y = 0; y < left && get_bits_left(gb) > 16; y++) {
330 for (x = 0; x < width; x++) {
331 b = decode_sym_565(gb, lru[0], 5);
332 g = decode_sym_565(gb, lru[1], is_565 ? 6 : 5);
333 r = decode_sym_565(gb, lru[2], 5);
334 dst[x * 3 + 0] = (r << 3) | (r >> 2);
335 dst[x * 3 + 1] = is_565 ? (g << 2) | (g >> 4) : (g << 3) | (g >> 2);
336 dst[x * 3 + 2] = (b << 3) | (b >> 2);
337 }
338
339 dst += stride;
340 }
341
342 return y;
343}
344
345static void setup_lru_555(uint8_t lru[3][8])
346{
347 memcpy(lru[0], def_lru_555, 8 * sizeof(*def_lru));
348 memcpy(lru[1], def_lru_555, 8 * sizeof(*def_lru));
349 memcpy(lru[2], def_lru_555, 8 * sizeof(*def_lru));
350}
351
352static void setup_lru_565(uint8_t lru[3][8])
353{
354 memcpy(lru[0], def_lru_555, 8 * sizeof(*def_lru));
355 memcpy(lru[1], def_lru_565, 8 * sizeof(*def_lru));
356 memcpy(lru[2], def_lru_555, 8 * sizeof(*def_lru));
357}
358
359static int dx2_decode_slice_555(GetBitContext *gb, AVFrame *frame,
360 int line, int left, uint8_t lru[3][8])
361{
362 return dx2_decode_slice_5x5(gb, frame, line, left, lru, 0);
363}
364
365static int dx2_decode_slice_565(GetBitContext *gb, AVFrame *frame,
366 int line, int left, uint8_t lru[3][8])
367{
368 return dx2_decode_slice_5x5(gb, frame, line, left, lru, 1);
369}
370
371static int dxtory_decode_v2_565(AVCodecContext *avctx, AVFrame *pic,
372 const uint8_t *src, int src_size, int is_565)
373{
374 enum AVPixelFormat fmt = AV_PIX_FMT_RGB24;
375 if (is_565)
376 return dxtory_decode_v2(avctx, pic, src, src_size,
377 dx2_decode_slice_565,
378 setup_lru_565,
379 fmt);
380 else
381 return dxtory_decode_v2(avctx, pic, src, src_size,
382 dx2_decode_slice_555,
383 setup_lru_555,
384 fmt);
385}
386
387static int dx2_decode_slice_rgb(GetBitContext *gb, AVFrame *frame,
388 int line, int left, uint8_t lru[3][8])
389{
390 int x, y;
391 int width = frame->width;
392 int stride = frame->linesize[0];
393 uint8_t *dst = frame->data[0] + stride * line;
394
395 for (y = 0; y < left && get_bits_left(gb) > 16; y++) {
396 for (x = 0; x < width; x++) {
397 dst[x * 3 + 0] = decode_sym(gb, lru[0]);
398 dst[x * 3 + 1] = decode_sym(gb, lru[1]);
399 dst[x * 3 + 2] = decode_sym(gb, lru[2]);
400 }
401
402 dst += stride;
403 }
404
405 return y;
406}
407
408static void default_setup_lru(uint8_t lru[3][8])
409{
410 int i;
411
412 for (i = 0; i < 3; i++)
413 memcpy(lru[i], def_lru, 8 * sizeof(*def_lru));
414}
415
416static int dxtory_decode_v2_rgb(AVCodecContext *avctx, AVFrame *pic,
417 const uint8_t *src, int src_size)
418{
419 return dxtory_decode_v2(avctx, pic, src, src_size,
420 dx2_decode_slice_rgb,
421 default_setup_lru,
422 AV_PIX_FMT_BGR24);
423}
424
425static int dx2_decode_slice_410(GetBitContext *gb, AVFrame *frame,
426 int line, int left,
427 uint8_t lru[3][8])
428{
429 int x, y, i, j;
430 int width = frame->width;
431
432 int ystride = frame->linesize[0];
433 int ustride = frame->linesize[1];
434 int vstride = frame->linesize[2];
435
436 uint8_t *Y = frame->data[0] + ystride * line;
437 uint8_t *U = frame->data[1] + (ustride >> 2) * line;
438 uint8_t *V = frame->data[2] + (vstride >> 2) * line;
439
440 for (y = 0; y < left - 3 && get_bits_left(gb) > 16; y += 4) {
441 for (x = 0; x < width; x += 4) {
442 for (j = 0; j < 4; j++)
443 for (i = 0; i < 4; i++)
444 Y[x + i + j * ystride] = decode_sym(gb, lru[0]);
445 U[x >> 2] = decode_sym(gb, lru[1]) ^ 0x80;
446 V[x >> 2] = decode_sym(gb, lru[2]) ^ 0x80;
447 }
448
449 Y += ystride << 2;
450 U += ustride;
451 V += vstride;
452 }
453
454 return y;
455}
456
457
458static int dxtory_decode_v2_410(AVCodecContext *avctx, AVFrame *pic,
459 const uint8_t *src, int src_size)
460{
461 return dxtory_decode_v2(avctx, pic, src, src_size,
462 dx2_decode_slice_410,
463 default_setup_lru,
464 AV_PIX_FMT_YUV410P);
465}
466
467static int dx2_decode_slice_420(GetBitContext *gb, AVFrame *frame,
468 int line, int left,
469 uint8_t lru[3][8])
470{
471 int x, y;
472
473 int width = frame->width;
474
475 int ystride = frame->linesize[0];
476 int ustride = frame->linesize[1];
477 int vstride = frame->linesize[2];
478
479 uint8_t *Y = frame->data[0] + ystride * line;
480 uint8_t *U = frame->data[1] + (ustride >> 1) * line;
481 uint8_t *V = frame->data[2] + (vstride >> 1) * line;
482
483
484 for (y = 0; y < left - 1 && get_bits_left(gb) > 16; y += 2) {
485 for (x = 0; x < width; x += 2) {
486 Y[x + 0 + 0 * ystride] = decode_sym(gb, lru[0]);
487 Y[x + 1 + 0 * ystride] = decode_sym(gb, lru[0]);
488 Y[x + 0 + 1 * ystride] = decode_sym(gb, lru[0]);
489 Y[x + 1 + 1 * ystride] = decode_sym(gb, lru[0]);
490 U[x >> 1] = decode_sym(gb, lru[1]) ^ 0x80;
491 V[x >> 1] = decode_sym(gb, lru[2]) ^ 0x80;
492 }
493
494 Y += ystride << 1;
495 U += ustride;
496 V += vstride;
497 }
498
499 return y;
500}
501
502static int dxtory_decode_v2_420(AVCodecContext *avctx, AVFrame *pic,
503 const uint8_t *src, int src_size)
504{
505 return dxtory_decode_v2(avctx, pic, src, src_size,
506 dx2_decode_slice_420,
507 default_setup_lru,
508 AV_PIX_FMT_YUV420P);
509}
510
511static int dx2_decode_slice_444(GetBitContext *gb, AVFrame *frame,
512 int line, int left,
513 uint8_t lru[3][8])
514{
515 int x, y;
516
517 int width = frame->width;
518
519 int ystride = frame->linesize[0];
520 int ustride = frame->linesize[1];
521 int vstride = frame->linesize[2];
522
523 uint8_t *Y = frame->data[0] + ystride * line;
524 uint8_t *U = frame->data[1] + ustride * line;
525 uint8_t *V = frame->data[2] + vstride * line;
526
527 for (y = 0; y < left && get_bits_left(gb) > 16; y++) {
528 for (x = 0; x < width; x++) {
529 Y[x] = decode_sym(gb, lru[0]);
530 U[x] = decode_sym(gb, lru[1]) ^ 0x80;
531 V[x] = decode_sym(gb, lru[2]) ^ 0x80;
532 }
533
534 Y += ystride;
535 U += ustride;
536 V += vstride;
537 }
538
539 return y;
540}
541
542static int dxtory_decode_v2_444(AVCodecContext *avctx, AVFrame *pic,
543 const uint8_t *src, int src_size)
544{
545 return dxtory_decode_v2(avctx, pic, src, src_size,
546 dx2_decode_slice_444,
547 default_setup_lru,
548 AV_PIX_FMT_YUV444P);
549}
550
551static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
552 AVPacket *avpkt)
553{
554 AVFrame *pic = data;
555 const uint8_t *src = avpkt->data;
556 int ret;
557
558 if (avpkt->size < 16) {
559 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
560 return AVERROR_INVALIDDATA;
561 }
562
563 switch (AV_RB32(src)) {
564 case 0x01000001:
565 ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
566 AV_PIX_FMT_BGR24, 3);
567 break;
568 case 0x01000009:
569 ret = dxtory_decode_v2_rgb(avctx, pic, src + 16, avpkt->size - 16);
570 break;
571 case 0x02000001:
572 ret = dxtory_decode_v1_420(avctx, pic, src + 16, avpkt->size - 16);
573 break;
574 case 0x02000009:
575 ret = dxtory_decode_v2_420(avctx, pic, src + 16, avpkt->size - 16);
576 break;
577 case 0x03000001:
578 ret = dxtory_decode_v1_410(avctx, pic, src + 16, avpkt->size - 16);
579 break;
580 case 0x03000009:
581 ret = dxtory_decode_v2_410(avctx, pic, src + 16, avpkt->size - 16);
582 break;
583 case 0x04000001:
584 ret = dxtory_decode_v1_444(avctx, pic, src + 16, avpkt->size - 16);
585 break;
586 case 0x04000009:
587 ret = dxtory_decode_v2_444(avctx, pic, src + 16, avpkt->size - 16);
588 break;
589 case 0x17000001:
590 ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
591 AV_PIX_FMT_RGB565LE, 2);
592 break;
593 case 0x17000009:
594 ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 1);
595 break;
596 case 0x18000001:
597 case 0x19000001:
598 ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
599 AV_PIX_FMT_RGB555LE, 2);
600 break;
601 case 0x18000009:
602 case 0x19000009:
603 ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 0);
604 break;
605 default:
606 avpriv_request_sample(avctx, "Frame header %"PRIX32, AV_RB32(src));
607 return AVERROR_PATCHWELCOME;
608 }
609
610 if (ret)
611 return ret;
612
613 pic->pict_type = AV_PICTURE_TYPE_I;
614 pic->key_frame = 1;
615 *got_frame = 1;
616
617 return avpkt->size;
618}
619
620AVCodec ff_dxtory_decoder = {
621 .name = "dxtory",
622 .long_name = NULL_IF_CONFIG_SMALL("Dxtory"),
623 .type = AVMEDIA_TYPE_VIDEO,
624 .id = AV_CODEC_ID_DXTORY,
625 .decode = decode_frame,
626 .capabilities = AV_CODEC_CAP_DR1,
627};
628
generated by cgit at 2024-05-17 05:48:54 (GMT)