FFmpeg
dxtory.c
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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/attributes.h"
26 #include "libavutil/common.h"
27 #include "libavutil/intreadwrite.h"
28 
29 #define BITSTREAM_READER_LE
30 #include "avcodec.h"
31 #include "bytestream.h"
32 #include "codec_internal.h"
33 #include "get_bits.h"
34 #include "unary.h"
35 #include "thread.h"
36 
37 static int64_t get_raw_size(enum AVPixelFormat fmt, int width, int height)
38 {
39  switch (fmt) {
40  case AV_PIX_FMT_RGB555LE:
41  case AV_PIX_FMT_RGB565LE:
42  return width * height * 2LL;
43  case AV_PIX_FMT_RGB24:
44  case AV_PIX_FMT_BGR24:
45  case AV_PIX_FMT_YUV444P:
46  return width * height * 3LL;
47  case AV_PIX_FMT_YUV420P:
48  return (int64_t)(width * height) + 2 * AV_CEIL_RSHIFT(width, 1) * AV_CEIL_RSHIFT(height, 1);
49  case AV_PIX_FMT_YUV410P:
50  return (int64_t)(width * height) + 2 * AV_CEIL_RSHIFT(width, 2) * AV_CEIL_RSHIFT(height, 2);
51  }
52 
53  return 0;
54 }
55 
56 static void do_vflip(AVCodecContext *avctx, AVFrame *pic, int vflip)
57 {
58  if (!vflip)
59  return;
60 
61  switch (pic->format) {
62  case AV_PIX_FMT_YUV444P:
63  pic->data[1] += (avctx->height - 1) * pic->linesize[1];
64  pic->linesize[1] = -pic->linesize[1];
65  pic->data[2] += (avctx->height - 1) * pic->linesize[2];
66  pic->linesize[2] = -pic->linesize[2];
67  av_fallthrough;
68  case AV_PIX_FMT_RGB555LE:
69  case AV_PIX_FMT_RGB565LE:
70  case AV_PIX_FMT_BGR24:
71  case AV_PIX_FMT_RGB24:
72  pic->data[0] += (avctx->height - 1) * pic->linesize[0];
73  pic->linesize[0] = -pic->linesize[0];
74  break;
75  case AV_PIX_FMT_YUV410P:
76  pic->data[0] += (avctx->height - 1) * pic->linesize[0];
77  pic->linesize[0] = -pic->linesize[0];
78  pic->data[1] += (AV_CEIL_RSHIFT(avctx->height, 2) - 1) * pic->linesize[1];
79  pic->linesize[1] = -pic->linesize[1];
80  pic->data[2] += (AV_CEIL_RSHIFT(avctx->height, 2) - 1) * pic->linesize[2];
81  pic->linesize[2] = -pic->linesize[2];
82  break;
83  case AV_PIX_FMT_YUV420P:
84  pic->data[0] += (avctx->height - 1) * pic->linesize[0];
85  pic->linesize[0] = -pic->linesize[0];
86  pic->data[1] += (AV_CEIL_RSHIFT(avctx->height, 1) - 1) * pic->linesize[1];
87  pic->linesize[1] = -pic->linesize[1];
88  pic->data[2] += (AV_CEIL_RSHIFT(avctx->height, 1) - 1) * pic->linesize[2];
89  pic->linesize[2] = -pic->linesize[2];
90  break;
91  }
92 }
93 
94 static int dxtory_decode_v1_rgb(AVCodecContext *avctx, AVFrame *pic,
95  const uint8_t *src, int src_size,
96  int id, int bpp, uint32_t vflipped)
97 {
98  int h;
99  uint8_t *dst;
100  int ret;
101 
102  if (src_size < get_raw_size(id, avctx->width, avctx->height)) {
103  av_log(avctx, AV_LOG_ERROR, "packet too small\n");
104  return AVERROR_INVALIDDATA;
105  }
106 
107  avctx->pix_fmt = id;
108  if ((ret = ff_thread_get_buffer(avctx, pic, 0)) < 0)
109  return ret;
110 
111  do_vflip(avctx, pic, vflipped);
112 
113  dst = pic->data[0];
114  for (h = 0; h < avctx->height; h++) {
115  memcpy(dst, src, avctx->width * bpp);
116  src += avctx->width * bpp;
117  dst += pic->linesize[0];
118  }
119 
120  do_vflip(avctx, pic, vflipped);
121 
122  return 0;
123 }
124 
125 static int dxtory_decode_v1_410(AVCodecContext *avctx, AVFrame *pic,
126  const uint8_t *src, int src_size,
127  uint32_t vflipped)
128 {
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, pic, 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 static int dxtory_decode_v1_420(AVCodecContext *avctx, AVFrame *pic,
221  const uint8_t *src, int src_size,
222  uint32_t vflipped)
223 {
224  int h, w;
225  uint8_t *Y1, *Y2, *U, *V;
226  int height, width, hmargin, vmargin;
227  int huvborder;
228  int ret;
229 
230  if (src_size < get_raw_size(AV_PIX_FMT_YUV420P, avctx->width, avctx->height)) {
231  av_log(avctx, AV_LOG_ERROR, "packet too small\n");
232  return AVERROR_INVALIDDATA;
233  }
234 
235  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
236  if ((ret = ff_thread_get_buffer(avctx, pic, 0)) < 0)
237  return ret;
238 
239  do_vflip(avctx, pic, vflipped);
240 
241  height = avctx->height & ~1;
242  width = avctx->width & ~1;
243  hmargin = avctx->width - width;
244  vmargin = avctx->height - height;
245  huvborder = AV_CEIL_RSHIFT(avctx->width, 1) - 1;
246 
247  Y1 = pic->data[0];
248  Y2 = pic->data[0] + pic->linesize[0];
249  U = pic->data[1];
250  V = pic->data[2];
251  for (h = 0; h < height; h += 2) {
252  for (w = 0; w < width; w += 2) {
253  AV_COPY16(Y1 + w, src);
254  AV_COPY16(Y2 + w, src + 2);
255  U[w >> 1] = src[4] + 0x80;
256  V[w >> 1] = src[5] + 0x80;
257  src += 6;
258  }
259  if (hmargin) {
260  Y1[width + 1] = src[0];
261  Y2[width + 1] = src[1];
262  U[huvborder] = src[2] + 0x80;
263  V[huvborder] = src[3] + 0x80;
264  src += 4;
265  }
266  Y1 += pic->linesize[0] * 2;
267  Y2 += pic->linesize[0] * 2;
268  U += pic->linesize[1];
269  V += pic->linesize[2];
270  }
271 
272  if (vmargin) {
273  for (w = 0; w < width; w += 2) {
274  AV_COPY16U(Y1 + w, src);
275  U[w >> 1] = src[0] + 0x80;
276  V[w >> 1] = src[1] + 0x80;
277  src += 4;
278  }
279  if (hmargin) {
280  Y1[w] = src[0];
281  U[huvborder] = src[1] + 0x80;
282  V[huvborder] = src[2] + 0x80;
283  src += 3;
284  }
285  }
286 
287  do_vflip(avctx, pic, vflipped);
288 
289  return 0;
290 }
291 
292 static int dxtory_decode_v1_444(AVCodecContext *avctx, AVFrame *pic,
293  const uint8_t *src, int src_size,
294  uint32_t vflipped)
295 {
296  int h, w;
297  uint8_t *Y, *U, *V;
298  int ret;
299 
300  if (src_size < get_raw_size(AV_PIX_FMT_YUV444P, avctx->width, avctx->height)) {
301  av_log(avctx, AV_LOG_ERROR, "packet too small\n");
302  return AVERROR_INVALIDDATA;
303  }
304 
305  avctx->pix_fmt = AV_PIX_FMT_YUV444P;
306  if ((ret = ff_thread_get_buffer(avctx, pic, 0)) < 0)
307  return ret;
308 
309  do_vflip(avctx, pic, vflipped);
310 
311  Y = pic->data[0];
312  U = pic->data[1];
313  V = pic->data[2];
314  for (h = 0; h < avctx->height; h++) {
315  for (w = 0; w < avctx->width; w++) {
316  Y[w] = *src++;
317  U[w] = *src++ ^ 0x80;
318  V[w] = *src++ ^ 0x80;
319  }
320  Y += pic->linesize[0];
321  U += pic->linesize[1];
322  V += pic->linesize[2];
323  }
324 
325  do_vflip(avctx, pic, vflipped);
326 
327  return 0;
328 }
329 
330 static const uint8_t def_lru[8] = { 0x00, 0x20, 0x40, 0x60, 0x80, 0xA0, 0xC0, 0xFF };
331 static const uint8_t def_lru_555[8] = { 0x00, 0x08, 0x10, 0x18, 0x1F };
332 static const uint8_t def_lru_565[8] = { 0x00, 0x08, 0x10, 0x20, 0x30, 0x3F };
333 
334 static inline uint8_t decode_sym(GetBitContext *gb, uint8_t lru[8])
335 {
336  uint8_t c, val;
337 
338  c = get_unary(gb, 0, 8);
339  if (!c) {
340  val = get_bits(gb, 8);
341  memmove(lru + 1, lru, sizeof(*lru) * (8 - 1));
342  } else {
343  val = lru[c - 1];
344  memmove(lru + 1, lru, sizeof(*lru) * (c - 1));
345  }
346  lru[0] = val;
347 
348  return val;
349 }
350 
351 static int check_slice_size(AVCodecContext *avctx,
352  const uint8_t *src, int src_size,
353  int slice_size, int off)
354 {
355  int cur_slice_size;
356 
357  if (slice_size > src_size - off) {
358  av_log(avctx, AV_LOG_ERROR,
359  "invalid slice size %d (only %d bytes left)\n",
360  slice_size, src_size - off);
361  return AVERROR_INVALIDDATA;
362  }
363  if (slice_size <= 16) {
364  av_log(avctx, AV_LOG_ERROR, "invalid slice size %d\n",
365  slice_size);
366  return AVERROR_INVALIDDATA;
367  }
368 
369  cur_slice_size = AV_RL32(src + off);
370  if (cur_slice_size != slice_size - 16) {
371  av_log(avctx, AV_LOG_ERROR,
372  "Slice sizes mismatch: got %d instead of %d\n",
373  cur_slice_size, slice_size - 16);
374  }
375 
376  return 0;
377 }
378 
379 static int load_buffer(AVCodecContext *avctx,
380  const uint8_t *src, int src_size,
381  GetByteContext *gb,
382  int *nslices, int *off)
383 {
384  bytestream2_init(gb, src, src_size);
385  *nslices = bytestream2_get_le16(gb);
386  *off = FFALIGN(*nslices * 4 + 2, 16);
387  if (src_size < *off) {
388  av_log(avctx, AV_LOG_ERROR, "no slice data\n");
389  return AVERROR_INVALIDDATA;
390  }
391 
392  if (!*nslices) {
393  avpriv_request_sample(avctx, "%d slices for %dx%d", *nslices,
394  avctx->width, avctx->height);
395  return AVERROR_PATCHWELCOME;
396  }
397 
398  return 0;
399 }
400 
401 static inline uint8_t decode_sym_565(GetBitContext *gb, uint8_t lru[8],
402  int bits)
403 {
404  uint8_t c, val;
405 
406  c = get_unary(gb, 0, bits);
407  if (!c) {
408  val = get_bits(gb, bits);
409  memmove(lru + 1, lru, sizeof(*lru) * (6 - 1));
410  } else {
411  val = lru[c - 1];
412  memmove(lru + 1, lru, sizeof(*lru) * (c - 1));
413  }
414  lru[0] = val;
415 
416  return val;
417 }
418 
419 typedef int (*decode_slice_func)(GetBitContext *gb, AVFrame *frame,
420  int line, int height, uint8_t lru[3][8]);
421 
422 typedef void (*setup_lru_func)(uint8_t lru[3][8]);
423 
424 static int dxtory_decode_v2(AVCodecContext *avctx, AVFrame *pic,
425  const uint8_t *src, int src_size,
426  decode_slice_func decode_slice,
427  setup_lru_func setup_lru,
428  enum AVPixelFormat fmt,
429  uint32_t vflipped)
430 {
431  GetByteContext gb, gb_check;
432  GetBitContext gb2;
433  int nslices, slice, line = 0;
434  uint32_t off, slice_size;
435  uint64_t off_check;
436  uint8_t lru[3][8];
437  int ret;
438 
439  ret = load_buffer(avctx, src, src_size, &gb, &nslices, &off);
440  if (ret < 0)
441  return ret;
442 
443  off_check = off;
444  gb_check = gb;
445  for (slice = 0; slice < nslices; slice++) {
446  slice_size = bytestream2_get_le32(&gb_check);
447 
448  if (slice_size <= 16 + (avctx->height * avctx->width / (8 * nslices)))
449  return AVERROR_INVALIDDATA;
450  off_check += slice_size;
451  }
452 
453  if (off_check - avctx->discard_damaged_percentage*off_check/100 > src_size)
454  return AVERROR_INVALIDDATA;
455 
456  avctx->pix_fmt = fmt;
457  if ((ret = ff_thread_get_buffer(avctx, pic, 0)) < 0)
458  return ret;
459 
460  do_vflip(avctx, pic, vflipped);
461 
462  for (slice = 0; slice < nslices; slice++) {
463  slice_size = bytestream2_get_le32(&gb);
464 
465  setup_lru(lru);
466 
467  ret = check_slice_size(avctx, src, src_size, slice_size, off);
468  if (ret < 0)
469  return ret;
470 
471  if ((ret = init_get_bits8(&gb2, src + off + 16, slice_size - 16)) < 0)
472  return ret;
473 
474  line += decode_slice(&gb2, pic, line, avctx->height - line, lru);
475 
476  off += slice_size;
477  }
478 
479  if (avctx->height - line) {
480  avpriv_request_sample(avctx, "Not enough slice data available");
481  }
482 
483  do_vflip(avctx, pic, vflipped);
484 
485  return 0;
486 }
487 
488 av_always_inline
489 static int dx2_decode_slice_5x5(GetBitContext *gb, AVFrame *frame,
490  int line, int left, uint8_t lru[3][8],
491  int is_565)
492 {
493  int x, y;
494  int r, g, b;
495  int width = frame->width;
496  int stride = frame->linesize[0];
497  uint8_t *dst = frame->data[0] + stride * line;
498 
499  for (y = 0; y < left && get_bits_left(gb) >= 3 * width; y++) {
500  for (x = 0; x < width; x++) {
501  b = decode_sym_565(gb, lru[0], 5);
502  g = decode_sym_565(gb, lru[1], is_565 ? 6 : 5);
503  r = decode_sym_565(gb, lru[2], 5);
504  dst[x * 3 + 0] = (r << 3) | (r >> 2);
505  dst[x * 3 + 1] = is_565 ? (g << 2) | (g >> 4) : (g << 3) | (g >> 2);
506  dst[x * 3 + 2] = (b << 3) | (b >> 2);
507  }
508 
509  dst += stride;
510  }
511 
512  return y;
513 }
514 
515 static void setup_lru_555(uint8_t lru[3][8])
516 {
517  memcpy(lru[0], def_lru_555, 8 * sizeof(*def_lru));
518  memcpy(lru[1], def_lru_555, 8 * sizeof(*def_lru));
519  memcpy(lru[2], def_lru_555, 8 * sizeof(*def_lru));
520 }
521 
522 static void setup_lru_565(uint8_t lru[3][8])
523 {
524  memcpy(lru[0], def_lru_555, 8 * sizeof(*def_lru));
525  memcpy(lru[1], def_lru_565, 8 * sizeof(*def_lru));
526  memcpy(lru[2], def_lru_555, 8 * sizeof(*def_lru));
527 }
528 
529 static int dx2_decode_slice_555(GetBitContext *gb, AVFrame *frame,
530  int line, int left, uint8_t lru[3][8])
531 {
532  return dx2_decode_slice_5x5(gb, frame, line, left, lru, 0);
533 }
534 
535 static int dx2_decode_slice_565(GetBitContext *gb, AVFrame *frame,
536  int line, int left, uint8_t lru[3][8])
537 {
538  return dx2_decode_slice_5x5(gb, frame, line, left, lru, 1);
539 }
540 
541 static int dxtory_decode_v2_565(AVCodecContext *avctx, AVFrame *pic,
542  const uint8_t *src, int src_size, int is_565,
543  uint32_t vflipped)
544 {
545  enum AVPixelFormat fmt = AV_PIX_FMT_RGB24;
546  if (is_565)
547  return dxtory_decode_v2(avctx, pic, src, src_size,
548  dx2_decode_slice_565,
549  setup_lru_565,
550  fmt, vflipped);
551  else
552  return dxtory_decode_v2(avctx, pic, src, src_size,
553  dx2_decode_slice_555,
554  setup_lru_555,
555  fmt, vflipped);
556 }
557 
558 static int dx2_decode_slice_rgb(GetBitContext *gb, AVFrame *frame,
559  int line, int left, uint8_t lru[3][8])
560 {
561  int x, y;
562  int width = frame->width;
563  int stride = frame->linesize[0];
564  uint8_t *dst = frame->data[0] + stride * line;
565 
566  for (y = 0; y < left && get_bits_left(gb) >= 3 * width; y++) {
567  for (x = 0; x < width; x++) {
568  dst[x * 3 + 0] = decode_sym(gb, lru[0]);
569  dst[x * 3 + 1] = decode_sym(gb, lru[1]);
570  dst[x * 3 + 2] = decode_sym(gb, lru[2]);
571  }
572 
573  dst += stride;
574  }
575 
576  return y;
577 }
578 
579 static void default_setup_lru(uint8_t lru[3][8])
580 {
581  int i;
582 
583  for (i = 0; i < 3; i++)
584  memcpy(lru[i], def_lru, 8 * sizeof(*def_lru));
585 }
586 
587 static int dxtory_decode_v2_rgb(AVCodecContext *avctx, AVFrame *pic,
588  const uint8_t *src, int src_size,
589  uint32_t vflipped)
590 {
591  return dxtory_decode_v2(avctx, pic, src, src_size,
592  dx2_decode_slice_rgb,
593  default_setup_lru,
594  AV_PIX_FMT_BGR24, vflipped);
595 }
596 
597 static int dx2_decode_slice_410(GetBitContext *gb, AVFrame *frame,
598  int line, int left,
599  uint8_t lru[3][8])
600 {
601  int x, y, i, j;
602  int width = frame->width;
603 
604  int ystride = frame->linesize[0];
605  int ustride = frame->linesize[1];
606  int vstride = frame->linesize[2];
607 
608  uint8_t *Y = frame->data[0] + ystride * line;
609  uint8_t *U = frame->data[1] + (ustride >> 2) * line;
610  uint8_t *V = frame->data[2] + (vstride >> 2) * line;
611 
612  int h, w, hmargin, vmargin;
613  int huvborder;
614 
615  h = frame->height & ~3;
616  w = frame->width & ~3;
617  hmargin = frame->width - w;
618  vmargin = frame->height - h;
619  huvborder = AV_CEIL_RSHIFT(frame->width, 2) - 1;
620 
621  for (y = 0; y < left - 3 && get_bits_left(gb) >= 18 * w / 4 + hmargin * 4 + (!!hmargin * 2); y += 4) {
622  for (x = 0; x < w; x += 4) {
623  for (j = 0; j < 4; j++)
624  for (i = 0; i < 4; i++)
625  Y[x + i + j * ystride] = decode_sym(gb, lru[0]);
626  U[x >> 2] = decode_sym(gb, lru[1]) ^ 0x80;
627  V[x >> 2] = decode_sym(gb, lru[2]) ^ 0x80;
628  }
629  if (hmargin) {
630  for (j = 0; j < 4; j++)
631  for (i = 0; i < hmargin; i++)
632  Y[x + i + j * ystride] = decode_sym(gb, lru[0]);
633  U[huvborder] = decode_sym(gb, lru[1]) ^ 0x80;
634  V[huvborder] = decode_sym(gb, lru[2]) ^ 0x80;
635  }
636 
637  Y += ystride * 4;
638  U += ustride;
639  V += vstride;
640  }
641 
642  if (vmargin && y + vmargin == left) {
643  for (x = 0; x < width; x += 4) {
644  for (j = 0; j < vmargin; j++)
645  for (i = 0; i < 4; i++)
646  Y[x + i + j * ystride] = decode_sym(gb, lru[0]);
647  U[x >> 2] = decode_sym(gb, lru[1]) ^ 0x80;
648  V[x >> 2] = decode_sym(gb, lru[2]) ^ 0x80;
649  }
650  if (hmargin) {
651  for (j = 0; j < vmargin; j++) {
652  for (i = 0; i < hmargin; i++)
653  Y[x + i + j * ystride] = decode_sym(gb, lru[0]);
654  }
655  U[huvborder] = decode_sym(gb, lru[1]) ^ 0x80;
656  V[huvborder] = decode_sym(gb, lru[2]) ^ 0x80;
657  }
658 
659  y += vmargin;
660  }
661 
662  return y;
663 }
664 
665 
666 static int dxtory_decode_v2_410(AVCodecContext *avctx, AVFrame *pic,
667  const uint8_t *src, int src_size,
668  uint32_t vflipped)
669 {
670  return dxtory_decode_v2(avctx, pic, src, src_size,
671  dx2_decode_slice_410,
672  default_setup_lru,
673  AV_PIX_FMT_YUV410P, vflipped);
674 }
675 
676 static int dx2_decode_slice_420(GetBitContext *gb, AVFrame *frame,
677  int line, int left,
678  uint8_t lru[3][8])
679 {
680  int x, y;
681 
682  int width = frame->width;
683 
684  int ystride = frame->linesize[0];
685  int ustride = frame->linesize[1];
686  int vstride = frame->linesize[2];
687 
688  uint8_t *Y = frame->data[0] + ystride * line;
689  uint8_t *U = frame->data[1] + (ustride >> 1) * line;
690  uint8_t *V = frame->data[2] + (vstride >> 1) * line;
691 
692  int h, w, hmargin, vmargin;
693  int huvborder;
694 
695  h = frame->height & ~1;
696  w = frame->width & ~1;
697  hmargin = frame->width - w;
698  vmargin = frame->height - h;
699  huvborder = AV_CEIL_RSHIFT(frame->width, 1) - 1;
700 
701  for (y = 0; y < left - 1 && get_bits_left(gb) >= 3 * w + hmargin * 4; y += 2) {
702  for (x = 0; x < w; x += 2) {
703  Y[x + 0 + 0 * ystride] = decode_sym(gb, lru[0]);
704  Y[x + 1 + 0 * ystride] = decode_sym(gb, lru[0]);
705  Y[x + 0 + 1 * ystride] = decode_sym(gb, lru[0]);
706  Y[x + 1 + 1 * ystride] = decode_sym(gb, lru[0]);
707  U[x >> 1] = decode_sym(gb, lru[1]) ^ 0x80;
708  V[x >> 1] = decode_sym(gb, lru[2]) ^ 0x80;
709  }
710  if (hmargin) {
711  Y[x + 0 * ystride] = decode_sym(gb, lru[0]);
712  Y[x + 1 * ystride] = decode_sym(gb, lru[0]);
713  U[huvborder] = decode_sym(gb, lru[1]) ^ 0x80;
714  V[huvborder] = decode_sym(gb, lru[2]) ^ 0x80;
715  }
716 
717  Y += ystride * 2;
718  U += ustride;
719  V += vstride;
720  }
721 
722  if (vmargin) {
723  for (x = 0; x < width; x += 2) {
724  Y[x + 0] = decode_sym(gb, lru[0]);
725  U[x >> 1] = decode_sym(gb, lru[1]) ^ 0x80;
726  V[x >> 1] = decode_sym(gb, lru[2]) ^ 0x80;
727  }
728  if (hmargin) {
729  Y[x] = decode_sym(gb, lru[0]);
730  U[huvborder] = decode_sym(gb, lru[1]) ^ 0x80;
731  V[huvborder] = decode_sym(gb, lru[2]) ^ 0x80;
732  }
733  }
734 
735  return y;
736 }
737 
738 static int dxtory_decode_v2_420(AVCodecContext *avctx, AVFrame *pic,
739  const uint8_t *src, int src_size,
740  uint32_t vflipped)
741 {
742  return dxtory_decode_v2(avctx, pic, src, src_size,
743  dx2_decode_slice_420,
744  default_setup_lru,
745  AV_PIX_FMT_YUV420P, vflipped);
746 }
747 
748 static int dx2_decode_slice_444(GetBitContext *gb, AVFrame *frame,
749  int line, int left,
750  uint8_t lru[3][8])
751 {
752  int x, y;
753 
754  int width = frame->width;
755 
756  int ystride = frame->linesize[0];
757  int ustride = frame->linesize[1];
758  int vstride = frame->linesize[2];
759 
760  uint8_t *Y = frame->data[0] + ystride * line;
761  uint8_t *U = frame->data[1] + ustride * line;
762  uint8_t *V = frame->data[2] + vstride * line;
763 
764  for (y = 0; y < left && get_bits_left(gb) >= 3 * width; y++) {
765  for (x = 0; x < width; x++) {
766  Y[x] = decode_sym(gb, lru[0]);
767  U[x] = decode_sym(gb, lru[1]) ^ 0x80;
768  V[x] = decode_sym(gb, lru[2]) ^ 0x80;
769  }
770 
771  Y += ystride;
772  U += ustride;
773  V += vstride;
774  }
775 
776  return y;
777 }
778 
779 static int dxtory_decode_v2_444(AVCodecContext *avctx, AVFrame *pic,
780  const uint8_t *src, int src_size,
781  uint32_t vflipped)
782 {
783  return dxtory_decode_v2(avctx, pic, src, src_size,
784  dx2_decode_slice_444,
785  default_setup_lru,
786  AV_PIX_FMT_YUV444P, vflipped);
787 }
788 
789 static int decode_frame(AVCodecContext *avctx, AVFrame *pic,
790  int *got_frame, AVPacket *avpkt)
791 {
792  const uint8_t *src = avpkt->data;
793  uint32_t type;
794  int vflipped, ret;
795 
796  if (avpkt->size < 16) {
797  av_log(avctx, AV_LOG_ERROR, "packet too small\n");
798  return AVERROR_INVALIDDATA;
799  }
800 
801  type = AV_RB32(src);
802  vflipped = !!(type & 0x20);
803 
804  switch (type) {
805  case 0x01000021:
806  case 0x01000001:
807  ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
808  AV_PIX_FMT_BGR24, 3, vflipped);
809  break;
810  case 0x01000029:
811  case 0x01000009:
812  ret = dxtory_decode_v2_rgb(avctx, pic, src + 16, avpkt->size - 16, vflipped);
813  break;
814  case 0x02000021:
815  case 0x02000001:
816  ret = dxtory_decode_v1_420(avctx, pic, src + 16, avpkt->size - 16, vflipped);
817  break;
818  case 0x02000029:
819  case 0x02000009:
820  ret = dxtory_decode_v2_420(avctx, pic, src + 16, avpkt->size - 16, vflipped);
821  break;
822  case 0x03000021:
823  case 0x03000001:
824  ret = dxtory_decode_v1_410(avctx, pic, src + 16, avpkt->size - 16, vflipped);
825  break;
826  case 0x03000029:
827  case 0x03000009:
828  ret = dxtory_decode_v2_410(avctx, pic, src + 16, avpkt->size - 16, vflipped);
829  break;
830  case 0x04000021:
831  case 0x04000001:
832  ret = dxtory_decode_v1_444(avctx, pic, src + 16, avpkt->size - 16, vflipped);
833  break;
834  case 0x04000029:
835  case 0x04000009:
836  ret = dxtory_decode_v2_444(avctx, pic, src + 16, avpkt->size - 16, vflipped);
837  break;
838  case 0x17000021:
839  case 0x17000001:
840  ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
841  AV_PIX_FMT_RGB565LE, 2, vflipped);
842  break;
843  case 0x17000029:
844  case 0x17000009:
845  ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 1, vflipped);
846  break;
847  case 0x18000021:
848  case 0x19000021:
849  case 0x18000001:
850  case 0x19000001:
851  ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
852  AV_PIX_FMT_RGB555LE, 2, vflipped);
853  break;
854  case 0x18000029:
855  case 0x19000029:
856  case 0x18000009:
857  case 0x19000009:
858  ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 0, vflipped);
859  break;
860  default:
861  avpriv_request_sample(avctx, "Frame header %"PRIX32, type);
862  return AVERROR_PATCHWELCOME;
863  }
864 
865  if (ret)
866  return ret;
867 
868  *got_frame = 1;
869 
870  return avpkt->size;
871 }
872 
873 const FFCodec ff_dxtory_decoder = {
874  .p.name = "dxtory",
875  CODEC_LONG_NAME("Dxtory"),
876  .p.type = AVMEDIA_TYPE_VIDEO,
877  .p.id = AV_CODEC_ID_DXTORY,
878  FF_CODEC_DECODE_CB(decode_frame),
879  .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
880 };
decode_slice_func
int(* decode_slice_func)(GetBitContext *gb, AVFrame *frame, int line, int height, uint8_t lru[3][8])
Definition: dxtory.c:419
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:71
get_bits_left
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:688
def_lru_565
static const uint8_t def_lru_565[8]
Definition: dxtory.c:332
r
const char * r
Definition: vf_curves.c:127
decode_slice
static int decode_slice(AVCodecContext *c, void *arg)
Definition: ffv1dec.c:377
GetByteContext
Definition: bytestream.h:33
setup_lru_func
void(* setup_lru_func)(uint8_t lru[3][8])
Definition: dxtory.c:422
int64_t
long long int64_t
Definition: coverity.c:34
def_lru
static const uint8_t def_lru[8]
Definition: dxtory.c:330
do_vflip
static void do_vflip(AVCodecContext *avctx, AVFrame *pic, int vflip)
Definition: dxtory.c:56
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:435
AVPacket::data
uint8_t * data
Definition: packet.h:595
b
#define b
Definition: input.c:43
ff_dxtory_decoder
const FFCodec ff_dxtory_decoder
Definition: dxtory.c:873
FFCodec
Definition: codec_internal.h:127
AV_PIX_FMT_BGR24
@ AV_PIX_FMT_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:76
thread.h
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:456
get_bits
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:337
load_buffer
static int load_buffer(AVCodecContext *avctx, const uint8_t *src, int src_size, GetByteContext *gb, int *nslices, int *off)
Definition: dxtory.c:379
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:131
GetBitContext
Definition: get_bits.h:109
dxtory_decode_v1_rgb
static int dxtory_decode_v1_rgb(AVCodecContext *avctx, AVFrame *pic, const uint8_t *src, int src_size, int id, int bpp, uint32_t vflipped)
Definition: dxtory.c:94
val
static double val(void *priv, double ch)
Definition: aeval.c:77
type
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf type
Definition: writing_filters.txt:86
dxtory_decode_v2_410
static int dxtory_decode_v2_410(AVCodecContext *avctx, AVFrame *pic, const uint8_t *src, int src_size, uint32_t vflipped)
Definition: dxtory.c:666
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:210
AV_COPY32U
#define AV_COPY32U(d, s)
Definition: intreadwrite.h:607
init_get_bits8
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:544
check_slice_size
static int check_slice_size(AVCodecContext *avctx, const uint8_t *src, int src_size, int slice_size, int off)
Definition: dxtory.c:351
FF_CODEC_DECODE_CB
#define FF_CODEC_DECODE_CB(func)
Definition: codec_internal.h:347
decode_sym_565
static uint8_t decode_sym_565(GetBitContext *gb, uint8_t lru[8], int bits)
Definition: dxtory.c:401
intreadwrite.h
dxtory_decode_v1_444
static int dxtory_decode_v1_444(AVCodecContext *avctx, AVFrame *pic, const uint8_t *src, int src_size, uint32_t vflipped)
Definition: dxtory.c:292
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:60
g
const char * g
Definition: vf_curves.c:128
ff_thread_get_buffer
int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f, int flags)
Wrapper around get_buffer() for frame-multithreaded codecs.
Definition: pthread_frame.c:1044
bits
uint8_t bits
Definition: vp3data.h:128
AV_COPY16U
#define AV_COPY16U(d, s)
Definition: intreadwrite.h:603
dxtory_decode_v2_rgb
static int dxtory_decode_v2_rgb(AVCodecContext *avctx, AVFrame *pic, const uint8_t *src, int src_size, uint32_t vflipped)
Definition: dxtory.c:587
get_bits.h
dxtory_decode_v1_410
static int dxtory_decode_v1_410(AVCodecContext *avctx, AVFrame *pic, const uint8_t *src, int src_size, uint32_t vflipped)
Definition: dxtory.c:125
AV_PIX_FMT_YUV420P
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:73
av_fallthrough
#define av_fallthrough
Definition: attributes.h:67
CODEC_LONG_NAME
#define CODEC_LONG_NAME(str)
Definition: codec_internal.h:332
AV_CODEC_CAP_FRAME_THREADS
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: codec.h:95
AV_PIX_FMT_RGB565LE
@ AV_PIX_FMT_RGB565LE
packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), little-endian
Definition: pixfmt.h:113
default_setup_lru
static void default_setup_lru(uint8_t lru[3][8])
Definition: dxtory.c:579
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:64
def_lru_555
static const uint8_t def_lru_555[8]
Definition: dxtory.c:331
V
#define V
Definition: avdct.c:32
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
get_unary
static int get_unary(GetBitContext *gb, int stop, int len)
Get unary code of limited length.
Definition: unary.h:46
get_raw_size
static int64_t get_raw_size(enum AVPixelFormat fmt, int width, int height)
Definition: dxtory.c:37
dx2_decode_slice_5x5
static av_always_inline int dx2_decode_slice_5x5(GetBitContext *gb, AVFrame *frame, int line, int left, uint8_t lru[3][8], int is_565)
Definition: dxtory.c:489
AV_PIX_FMT_RGB24
@ AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:75
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
AVPacket::size
int size
Definition: packet.h:596
dx2_decode_slice_444
static int dx2_decode_slice_444(GetBitContext *gb, AVFrame *frame, int line, int left, uint8_t lru[3][8])
Definition: dxtory.c:748
height
#define height
Definition: dsp.h:89
codec_internal.h
dst
uint8_t ptrdiff_t const uint8_t ptrdiff_t int intptr_t intptr_t int int16_t * dst
Definition: dsp.h:87
i
#define i(width, name, range_min, range_max)
Definition: cbs_h264.c:63
dxtory_decode_v2_420
static int dxtory_decode_v2_420(AVCodecContext *avctx, AVFrame *pic, const uint8_t *src, int src_size, uint32_t vflipped)
Definition: dxtory.c:738
AV_RB32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:96
AVFrame::format
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames,...
Definition: frame.h:522
line
Definition: graph2dot.c:48
attributes.h
decode_frame
static int decode_frame(AVCodecContext *avctx, AVFrame *pic, int *got_frame, AVPacket *avpkt)
Definition: dxtory.c:789
unary.h
dxtory_decode_v1_420
static int dxtory_decode_v1_420(AVCodecContext *avctx, AVFrame *pic, const uint8_t *src, int src_size, uint32_t vflipped)
Definition: dxtory.c:220
Y
#define Y
Definition: boxblur.h:37
AV_COPY16
#define AV_COPY16(d, s)
Definition: intreadwrite.h:630
AV_PIX_FMT_RGB555LE
@ AV_PIX_FMT_RGB555LE
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), little-endian, X=unused/undefined
Definition: pixfmt.h:115
common.h
av_always_inline
#define av_always_inline
Definition: attributes.h:76
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:179
setup_lru_555
static void setup_lru_555(uint8_t lru[3][8])
Definition: dxtory.c:515
AVCodecContext::height
int height
Definition: avcodec.h:600
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:639
setup_lru_565
static void setup_lru_565(uint8_t lru[3][8])
Definition: dxtory.c:522
avcodec.h
ret
ret
Definition: filter_design.txt:187
frame
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:265
dx2_decode_slice_420
static int dx2_decode_slice_420(GetBitContext *gb, AVFrame *frame, int line, int left, uint8_t lru[3][8])
Definition: dxtory.c:676
id
enum AVCodecID id
Definition: dts2pts.c:550
left
Tag MUST be and< 10hcoeff half pel interpolation filter coefficients, hcoeff[0] are the 2 middle coefficients[1] are the next outer ones and so on, resulting in a filter like:...eff[2], hcoeff[1], hcoeff[0], hcoeff[0], hcoeff[1], hcoeff[2] ... the sign of the coefficients is not explicitly stored but alternates after each coeff and coeff[0] is positive, so ...,+,-,+,-,+,+,-,+,-,+,... hcoeff[0] is not explicitly stored but found by subtracting the sum of all stored coefficients with signs from 32 hcoeff[0]=32 - hcoeff[1] - hcoeff[2] - ... a good choice for hcoeff and htaps is htaps=6 hcoeff={40,-10, 2} an alternative which requires more computations at both encoder and decoder side and may or may not be better is htaps=8 hcoeff={42,-14, 6,-2}ref_frames minimum of the number of available reference frames and max_ref_frames for example the first frame after a key frame always has ref_frames=1spatial_decomposition_type wavelet type 0 is a 9/7 symmetric compact integer wavelet 1 is a 5/3 symmetric compact integer wavelet others are reserved stored as delta from last, last is reset to 0 if always_reset||keyframeqlog quality(logarithmic quantizer scale) stored as delta from last, last is reset to 0 if always_reset||keyframemv_scale stored as delta from last, last is reset to 0 if always_reset||keyframe FIXME check that everything works fine if this changes between framesqbias dequantization bias stored as delta from last, last is reset to 0 if always_reset||keyframeblock_max_depth maximum depth of the block tree stored as delta from last, last is reset to 0 if always_reset||keyframequant_table quantization tableHighlevel bitstream structure:==============================--------------------------------------------|Header|--------------------------------------------|------------------------------------|||Block0||||split?||||yes no||||......... intra?||||:Block01 :yes no||||:Block02 :....... ..........||||:Block03 ::y DC ::ref index:||||:Block04 ::cb DC ::motion x :||||......... :cr DC ::motion y :||||....... ..........|||------------------------------------||------------------------------------|||Block1|||...|--------------------------------------------|------------ ------------ ------------|||Y subbands||Cb subbands||Cr subbands||||--- ---||--- ---||--- ---|||||LL0||HL0||||LL0||HL0||||LL0||HL0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||LH0||HH0||||LH0||HH0||||LH0||HH0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HL1||LH1||||HL1||LH1||||HL1||LH1|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HH1||HL2||||HH1||HL2||||HH1||HL2|||||...||...||...|||------------ ------------ ------------|--------------------------------------------Decoding process:=================------------|||Subbands|------------||||------------|Intra DC||||LL0 subband prediction ------------|\ Dequantization ------------------- \||Reference frames|\ IDWT|------- -------|Motion \|||Frame 0||Frame 1||Compensation . OBMC v -------|------- -------|--------------. \------> Frame n output Frame Frame<----------------------------------/|...|------------------- Range Coder:============Binary Range Coder:------------------- The implemented range coder is an adapted version based upon "Range encoding: an algorithm for removing redundancy from a digitised message." by G. N. N. Martin. The symbols encoded by the Snow range coder are bits(0|1). The associated probabilities are not fix but change depending on the symbol mix seen so far. bit seen|new state ---------+----------------------------------------------- 0|256 - state_transition_table[256 - old_state];1|state_transition_table[old_state];state_transition_table={ 0, 0, 0, 0, 0, 0, 0, 0, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 190, 191, 192, 194, 194, 195, 196, 197, 198, 199, 200, 201, 202, 202, 204, 205, 206, 207, 208, 209, 209, 210, 211, 212, 213, 215, 215, 216, 217, 218, 219, 220, 220, 222, 223, 224, 225, 226, 227, 227, 229, 229, 230, 231, 232, 234, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 248, 0, 0, 0, 0, 0, 0, 0};FIXME Range Coding of integers:------------------------- FIXME Neighboring Blocks:===================left and top are set to the respective blocks unless they are outside of the image in which case they are set to the Null block top-left is set to the top left block unless it is outside of the image in which case it is set to the left block if this block has no larger parent block or it is at the left side of its parent block and the top right block is not outside of the image then the top right block is used for top-right else the top-left block is used Null block y, cb, cr are 128 level, ref, mx and my are 0 Motion Vector Prediction:=========================1. the motion vectors of all the neighboring blocks are scaled to compensate for the difference of reference frames scaled_mv=(mv *(256 *(current_reference+1)/(mv.reference+1))+128)> the median of the scaled left
Definition: snow.txt:386
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:92
U
#define U(x)
Definition: vpx_arith.h:37
AVCodecContext
main external API structure.
Definition: avcodec.h:439
AVCodecContext::discard_damaged_percentage
int discard_damaged_percentage
The percentage of damaged samples to discard a frame.
Definition: avcodec.h:1829
dx2_decode_slice_565
static int dx2_decode_slice_565(GetBitContext *gb, AVFrame *frame, int line, int left, uint8_t lru[3][8])
Definition: dxtory.c:535
AV_PIX_FMT_YUV444P
@ AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:78
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:200
dx2_decode_slice_410
static int dx2_decode_slice_410(GetBitContext *gb, AVFrame *frame, int line, int left, uint8_t lru[3][8])
Definition: dxtory.c:597
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:37
w
uint8_t w
Definition: llvidencdsp.c:39
dxtory_decode_v2_444
static int dxtory_decode_v2_444(AVCodecContext *avctx, AVFrame *pic, const uint8_t *src, int src_size, uint32_t vflipped)
Definition: dxtory.c:779
FFALIGN
#define FFALIGN(x, a)
Definition: macros.h:78
AVPacket
This structure stores compressed data.
Definition: packet.h:572
dx2_decode_slice_rgb
static int dx2_decode_slice_rgb(GetBitContext *gb, AVFrame *frame, int line, int left, uint8_t lru[3][8])
Definition: dxtory.c:558
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:600
bytestream.h
bytestream2_init
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:137
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
Definition: frame.h:480
AV_PIX_FMT_YUV410P
@ AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:79
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
dxtory_decode_v2
static int dxtory_decode_v2(AVCodecContext *avctx, AVFrame *pic, const uint8_t *src, int src_size, decode_slice_func decode_slice, setup_lru_func setup_lru, enum AVPixelFormat fmt, uint32_t vflipped)
Definition: dxtory.c:424
dx2_decode_slice_555
static int dx2_decode_slice_555(GetBitContext *gb, AVFrame *frame, int line, int left, uint8_t lru[3][8])
Definition: dxtory.c:529
h
h
Definition: vp9dsp_template.c:2070
decode_sym
static uint8_t decode_sym(GetBitContext *gb, uint8_t lru[8])
Definition: dxtory.c:334
stride
#define stride
Definition: h264pred_template.c:536
AV_CODEC_ID_DXTORY
@ AV_CODEC_ID_DXTORY
Definition: codec_id.h:208
width
#define width
Definition: dsp.h:89
src
#define src
Definition: vp8dsp.c:248
line
The official guide to swscale for confused that consecutive non overlapping rectangles of slice_bottom special converter These generally are unscaled converters of common like for each output line the vertical scaler pulls lines from a ring buffer When the ring buffer does not contain the wanted line
Definition: swscale.txt:40
dxtory_decode_v2_565
static int dxtory_decode_v2_565(AVCodecContext *avctx, AVFrame *pic, const uint8_t *src, int src_size, int is_565, uint32_t vflipped)
Definition: dxtory.c:541
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