FFmpeg  4.4.6
ylc.c
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1 /*
2  * YUY2 Lossless Codec
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include <stdio.h>
22 #include <stdlib.h>
23 #include <string.h>
24 
25 #define YLC_VLC_BITS 10
26 
27 #include "libavutil/imgutils.h"
28 #include "libavutil/internal.h"
29 #include "libavutil/intreadwrite.h"
30 #include "libavutil/mem.h"
31 #include "avcodec.h"
32 #include "bswapdsp.h"
33 #include "get_bits.h"
34 #include "huffyuvdsp.h"
35 #include "internal.h"
36 #include "thread.h"
37 #include "unary.h"
38 
39 typedef struct YLCContext {
40  VLC vlc[4];
41  uint32_t table[256];
45 } YLCContext;
46 
48 {
49  YLCContext *s = avctx->priv_data;
50 
51  avctx->pix_fmt = AV_PIX_FMT_YUYV422;
52  ff_bswapdsp_init(&s->bdsp);
53 
54  return 0;
55 }
56 
57 typedef struct Node {
58  int16_t sym;
59  uint32_t count;
60  int16_t l, r;
61 } Node;
62 
63 static void get_tree_codes(uint32_t *bits, int16_t *lens, uint8_t *xlat,
64  Node *nodes, int node,
65  uint32_t pfx, int pl, int *pos)
66 {
67  int s;
68 
69  s = nodes[node].sym;
70  if (s != -1) {
71  bits[*pos] = (~pfx) & ((1ULL << FFMAX(pl, 1)) - 1);
72  lens[*pos] = FFMAX(pl, 1);
73  xlat[*pos] = s + (pl == 0);
74  (*pos)++;
75  } else {
76  pfx <<= 1;
77  pl++;
78  get_tree_codes(bits, lens, xlat, nodes, nodes[node].l, pfx, pl,
79  pos);
80  pfx |= 1;
81  get_tree_codes(bits, lens, xlat, nodes, nodes[node].r, pfx, pl,
82  pos);
83  }
84 }
85 
86 static int build_vlc(AVCodecContext *avctx, VLC *vlc, const uint32_t *table)
87 {
88  Node nodes[512];
89  uint32_t bits[256];
90  int16_t lens[256];
91  uint8_t xlat[256];
92  int cur_node, i, j, pos = 0;
93 
94  ff_free_vlc(vlc);
95 
96  for (i = 0; i < 256; i++) {
97  nodes[i].count = table[i];
98  nodes[i].sym = i;
99  nodes[i].l = i;
100  nodes[i].r = i;
101  }
102 
103  cur_node = 256;
104  j = 0;
105  do {
106  for (i = 0; ; i++) {
107  int new_node = j;
108  int first_node = cur_node;
109  int second_node = cur_node;
110  unsigned nd, st;
111 
112  nodes[cur_node].count = -1;
113 
114  do {
115  int val = nodes[new_node].count;
116  if (val && (val < nodes[first_node].count)) {
117  if (val >= nodes[second_node].count) {
118  first_node = new_node;
119  } else {
120  first_node = second_node;
121  second_node = new_node;
122  }
123  }
124  new_node += 1;
125  } while (new_node != cur_node);
126 
127  if (first_node == cur_node)
128  break;
129 
130  nd = nodes[second_node].count;
131  st = nodes[first_node].count;
132  nodes[second_node].count = 0;
133  nodes[first_node].count = 0;
134  if (nd >= UINT32_MAX - st) {
135  av_log(avctx, AV_LOG_ERROR, "count overflow\n");
136  return AVERROR_INVALIDDATA;
137  }
138  nodes[cur_node].count = nd + st;
139  nodes[cur_node].sym = -1;
140  nodes[cur_node].l = first_node;
141  nodes[cur_node].r = second_node;
142  cur_node++;
143  }
144  j++;
145  } while (cur_node - 256 == j);
146 
147  get_tree_codes(bits, lens, xlat, nodes, cur_node - 1, 0, 0, &pos);
148 
149  return ff_init_vlc_sparse(vlc, YLC_VLC_BITS, pos, lens, 2, 2,
150  bits, 4, 4, xlat, 1, 1, 0);
151 }
152 
153 static const uint8_t table_y1[] = {
154  0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
155  0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
156  0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
157  0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
158  0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
159  0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF,
160  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
161  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
162  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
163  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
164  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
165  0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
166  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
167  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
168  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
169  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
170  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
171  0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
172  0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
173  0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
174  0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
175  0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
176  0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02,
177  0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
178  0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
179  0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
180  0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
181  0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
182  0x02, 0x00,
183 };
184 
185 static const uint8_t table_u[] = {
186  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
187  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00,
188  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
189  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01,
190  0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
191  0x01, 0x01, 0x01, 0x01, 0x01, 0xFF, 0xFF, 0xFF,
192  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
193  0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00,
194  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
195  0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01,
196  0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
197  0x01, 0x01, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
198  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
199  0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
200  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
201  0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
202  0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0xFF,
203  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
204  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00,
205  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
206  0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01,
207  0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
208  0x01, 0x01, 0x01, 0x01, 0xFF, 0xFF, 0xFF, 0xFF,
209  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
210  0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00,
211  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
212  0x00, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
213  0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
214  0x01, 0x00,
215 };
216 
217 static const uint8_t table_y2[] = {
218  0xFC, 0xFC, 0xFC, 0xFD, 0xFD, 0xFD, 0xFE, 0xFE,
219  0xFE, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0xFC,
220  0xFC, 0xFC, 0xFD, 0xFD, 0xFD, 0xFE, 0xFE, 0xFE,
221  0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0xFC, 0xFC,
222  0xFC, 0xFD, 0xFD, 0xFD, 0xFE, 0xFE, 0xFE, 0xFF,
223  0xFF, 0xFF, 0x00, 0x00, 0x00, 0xFD, 0xFD, 0xFD,
224  0xFE, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0x00, 0x00,
225  0x00, 0x01, 0x01, 0x01, 0xFD, 0xFD, 0xFD, 0xFE,
226  0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00,
227  0x01, 0x01, 0x01, 0xFD, 0xFD, 0xFD, 0xFE, 0xFE,
228  0xFE, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x01,
229  0x01, 0x01, 0xFE, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF,
230  0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x02, 0x02,
231  0x02, 0xFE, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0x00,
232  0x00, 0x00, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02,
233  0xFE, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0x00, 0x00,
234  0x00, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0xFF,
235  0xFF, 0xFF, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01,
236  0x02, 0x02, 0x02, 0x03, 0x03, 0x03, 0xFF, 0xFF,
237  0xFF, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x02,
238  0x02, 0x02, 0x03, 0x03, 0x03, 0xFF, 0xFF, 0xFF,
239  0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x02, 0x02,
240  0x02, 0x03, 0x03, 0x03, 0x00, 0x00, 0x00, 0x01,
241  0x01, 0x01, 0x02, 0x02, 0x02, 0x03, 0x03, 0x03,
242  0x04, 0x04, 0x04, 0x00, 0x00, 0x00, 0x01, 0x01,
243  0x01, 0x02, 0x02, 0x02, 0x03, 0x03, 0x03, 0x04,
244  0x04, 0x04, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01,
245  0x02, 0x02, 0x02, 0x03, 0x03, 0x03, 0x04, 0x04,
246  0x04, 0x00,
247 };
248 
249 static const uint8_t table_v[] = {
250  0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00,
251  0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF,
252  0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01,
253  0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00,
254  0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF,
255  0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01,
256  0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00,
257  0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF,
258  0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01,
259  0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00,
260  0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF,
261  0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01,
262  0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00,
263  0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF,
264  0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01,
265  0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00,
266  0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF,
267  0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01,
268  0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00,
269  0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF,
270  0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01,
271  0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00,
272  0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF,
273  0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01,
274  0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00,
275  0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF,
276  0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01,
277  0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00,
278  0x01, 0x00,
279 };
280 
281 static int decode_frame(AVCodecContext *avctx,
282  void *data, int *got_frame,
283  AVPacket *avpkt)
284 {
285  int TL[4] = { 128, 128, 128, 128 };
286  int L[4] = { 128, 128, 128, 128 };
287  YLCContext *s = avctx->priv_data;
288  ThreadFrame frame = { .f = data };
289  const uint8_t *buf = avpkt->data;
290  int ret, x, y, toffset, boffset;
291  AVFrame * const p = data;
292  GetBitContext gb;
293  uint8_t *dst;
294 
295  if (avpkt->size <= 16)
296  return AVERROR_INVALIDDATA;
297 
298  if (AV_RL32(buf) != MKTAG('Y', 'L', 'C', '0') ||
299  AV_RL32(buf + 4) != 0)
300  return AVERROR_INVALIDDATA;
301 
302  toffset = AV_RL32(buf + 8);
303  if (toffset < 16 || toffset >= avpkt->size)
304  return AVERROR_INVALIDDATA;
305 
306  boffset = AV_RL32(buf + 12);
307  if (toffset >= boffset || boffset >= avpkt->size)
308  return AVERROR_INVALIDDATA;
309 
310  if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
311  return ret;
312 
313  av_fast_malloc(&s->buffer, &s->buffer_size,
314  FFMAX(boffset - toffset, avpkt->size - boffset)
316  if (!s->buffer)
317  return AVERROR(ENOMEM);
318 
319  memcpy(s->buffer, avpkt->data + toffset, boffset - toffset);
320  memset(s->buffer + boffset - toffset, 0, AV_INPUT_BUFFER_PADDING_SIZE);
321  s->bdsp.bswap_buf((uint32_t *) s->buffer,
322  (uint32_t *) s->buffer,
323  (boffset - toffset + 3) >> 2);
324  if ((ret = init_get_bits8(&gb, s->buffer, boffset - toffset)) < 0)
325  return ret;
326 
327  for (int i = 0; i < 4; i++) {
328  for (x = 0; x < 256; x++) {
329  unsigned len = get_unary(&gb, 1, 31);
330  uint32_t val = ((1U << len) - 1) + get_bits_long(&gb, len);
331 
332  s->table[x] = val;
333  }
334 
335  ret = build_vlc(avctx, &s->vlc[i], s->table);
336  if (ret < 0)
337  return ret;
338  }
339 
340  memcpy(s->buffer, avpkt->data + boffset, avpkt->size - boffset);
341  memset(s->buffer + avpkt->size - boffset, 0, AV_INPUT_BUFFER_PADDING_SIZE);
342  s->bdsp.bswap_buf((uint32_t *) s->buffer,
343  (uint32_t *) s->buffer,
344  (avpkt->size - boffset) >> 2);
345  if ((ret = init_get_bits8(&gb, s->buffer, avpkt->size - boffset)) < 0)
346  return ret;
347 
348  dst = p->data[0];
349  for (y = 0; y < avctx->height; y++) {
350  memset(dst, 0, avctx->width * 2);
351  dst += p->linesize[0];
352  }
353 
354  dst = p->data[0];
355  for (y = 0; y < avctx->height; y++) {
356  for (x = 0; x < avctx->width * 2 && y < avctx->height;) {
357  if (get_bits_left(&gb) <= 0)
358  return AVERROR_INVALIDDATA;
359 
360  if (get_bits1(&gb)) {
361  int val = get_vlc2(&gb, s->vlc[0].table, YLC_VLC_BITS, 3);
362  if (val < 0) {
363  return AVERROR_INVALIDDATA;
364  } else if (val < 0xE1) {
365  dst[x ] = table_y1[val];
366  dst[x + 1] = table_u[val];
367  dst[x + 2] = table_y2[val];
368  dst[x + 3] = table_v[val];
369  x += 4;
370  } else {
371  int incr = (val - 0xDF) * 4;
372  if (x + incr >= avctx->width * 2) {
373  int iy = ((x + incr) / (avctx->width * 2));
374  x = (x + incr) % (avctx->width * 2);
375  y += iy;
376  dst += iy * p->linesize[0];
377  } else {
378  x += incr;
379  }
380  }
381  } else {
382  int y1, y2, u, v;
383 
384  y1 = get_vlc2(&gb, s->vlc[1].table, YLC_VLC_BITS, 3);
385  u = get_vlc2(&gb, s->vlc[2].table, YLC_VLC_BITS, 3);
386  y2 = get_vlc2(&gb, s->vlc[1].table, YLC_VLC_BITS, 3);
387  v = get_vlc2(&gb, s->vlc[3].table, YLC_VLC_BITS, 3);
388  if (y1 < 0 || y2 < 0 || u < 0 || v < 0)
389  return AVERROR_INVALIDDATA;
390  dst[x ] = y1;
391  dst[x + 1] = u;
392  dst[x + 2] = y1 + y2;
393  dst[x + 3] = v;
394  x += 4;
395  }
396  }
397  dst += p->linesize[0];
398  }
399 
400  dst = p->data[0];
401  for (x = 0; x < avctx->width * 2; x += 4) {
402  dst[x ] = dst[x ] + L[0];
403  dst[x + 2] = L[0] = dst[x + 2] + L[0];
404  L[1] = dst[x + 1] + L[1];
405  dst[x + 1] = L[1];
406  L[2] = dst[x + 3] + L[2];
407  dst[x + 3] = L[2];
408  }
409  dst += p->linesize[0];
410 
411  for (y = 1; y < avctx->height; y++) {
412  x = 0;
413  dst[x ] = dst[x ] + L[0] + dst[x + 0 - p->linesize[0]] - TL[0];
414  dst[x + 2] = L[0] = dst[x + 2] + L[0] + dst[x + 2 - p->linesize[0]] - TL[0];
415  TL[0] = dst[x + 2 - p->linesize[0]];
416  L[1] = dst[x + 1] + L[1] + dst[x + 1 - p->linesize[0]] - TL[1];
417  dst[x + 1] = L[1];
418  TL[1] = dst[x + 1 - p->linesize[0]];
419  L[2] = dst[x + 3] + L[2] + dst[x + 3 - p->linesize[0]] - TL[2];
420  dst[x + 3] = L[2];
421  TL[2] = dst[x + 3 - p->linesize[0]];
422  for (x = 4; x < avctx->width * 2; x += 4) {
423  dst[x ] = dst[x ] + L[0] + dst[x + 0 - p->linesize[0]] - TL[0];
424  dst[x + 2] = L[0] = dst[x + 2] + L[0] + dst[x + 2 - p->linesize[0]] - TL[0];
425  TL[0] = dst[x + 2 - p->linesize[0]];
426  L[1] = dst[x + 1] + L[1] + dst[x + 1 - p->linesize[0]] - TL[1];
427  dst[x + 1] = L[1];
428  TL[1] = dst[x + 1 - p->linesize[0]];
429  L[2] = dst[x + 3] + L[2] + dst[x + 3 - p->linesize[0]] - TL[2];
430  dst[x + 3] = L[2];
431  TL[2] = dst[x + 3 - p->linesize[0]];
432  }
433  dst += p->linesize[0];
434  }
435 
437  p->key_frame = 1;
438  *got_frame = 1;
439 
440  return avpkt->size;
441 }
442 
444 {
445  YLCContext *s = avctx->priv_data;
446 
447  for (int i = 0; i < FF_ARRAY_ELEMS(s->vlc); i++)
448  ff_free_vlc(&s->vlc[i]);
449  av_freep(&s->buffer);
450  s->buffer_size = 0;
451 
452  return 0;
453 }
454 
456  .name = "ylc",
457  .long_name = NULL_IF_CONFIG_SMALL("YUY2 Lossless Codec"),
458  .type = AVMEDIA_TYPE_VIDEO,
459  .id = AV_CODEC_ID_YLC,
460  .priv_data_size = sizeof(YLCContext),
461  .init = decode_init,
462  .close = decode_end,
463  .decode = decode_frame,
465  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
466 };
static double val(void *priv, double ch)
Definition: aeval.c:76
#define L(x)
Definition: vp56_arith.h:36
#define av_cold
Definition: attributes.h:88
uint8_t
Libavcodec external API header.
#define AV_RL32
Definition: intreadwrite.h:146
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
int ff_init_vlc_sparse(VLC *vlc_arg, int nb_bits, int nb_codes, const void *bits, int bits_wrap, int bits_size, const void *codes, int codes_wrap, int codes_size, const void *symbols, int symbols_wrap, int symbols_size, int flags)
Definition: bitstream.c:323
void ff_free_vlc(VLC *vlc)
Definition: bitstream.c:431
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:264
#define s(width, name)
Definition: cbs_vp9.c:257
#define MKTAG(a, b, c, d)
Definition: common.h:478
#define FFMAX(a, b)
Definition: common.h:103
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
static AVFrame * frame
bitstream reader API header.
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:546
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
Definition: get_bits.h:797
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:849
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:498
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:677
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: codec.h:108
@ AV_CODEC_ID_YLC
Definition: codec_id.h:271
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding.
Definition: avcodec.h:215
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
Allocate a buffer, reusing the given one if large enough.
Definition: mem.c:502
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:274
misc image utilities
int i
Definition: input.c:407
av_cold void ff_bswapdsp_init(BswapDSPContext *c)
Definition: bswapdsp.c:49
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:41
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
Memory handling functions.
const char data[16]
Definition: mxf.c:142
@ AV_PIX_FMT_YUYV422
packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
Definition: pixfmt.h:67
static const uint16_t table[]
Definition: prosumer.c:206
FF_ENABLE_DEPRECATION_WARNINGS int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
Wrapper around get_buffer() for frame-multithreaded codecs.
#define FF_ARRAY_ELEMS(a)
unsigned int pos
Definition: spdifenc.c:412
main external API structure.
Definition: avcodec.h:536
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:746
int width
picture width / height.
Definition: avcodec.h:709
void * priv_data
Definition: avcodec.h:563
AVCodec.
Definition: codec.h:197
const char * name
Name of the codec implementation.
Definition: codec.h:204
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:332
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:396
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:349
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:401
This structure stores compressed data.
Definition: packet.h:346
int size
Definition: packet.h:370
uint8_t * data
Definition: packet.h:369
Definition: agm.c:915
int16_t r
Definition: mvha.c:53
uint32_t count
Definition: huffman.h:35
int16_t l
Definition: mvha.c:53
int16_t sym
Definition: huffman.h:33
Definition: vlc.h:26
Definition: ylc.c:39
BswapDSPContext bdsp
Definition: ylc.c:44
uint32_t table[256]
Definition: ylc.c:41
uint8_t * buffer
Definition: ylc.c:42
int buffer_size
Definition: ylc.c:43
VLC vlc[4]
Definition: ylc.c:40
#define av_freep(p)
#define av_log(a,...)
static int get_unary(GetBitContext *gb, int stop, int len)
Get unary code of limited length.
Definition: unary.h:46
const char * r
Definition: vf_curves.c:116
int len
uint8_t bits
Definition: vp3data.h:141
AVCodec ff_ylc_decoder
Definition: ylc.c:455
static int build_vlc(AVCodecContext *avctx, VLC *vlc, const uint32_t *table)
Definition: ylc.c:86
static const uint8_t table_v[]
Definition: ylc.c:249
static av_cold int decode_init(AVCodecContext *avctx)
Definition: ylc.c:47
static av_cold int decode_end(AVCodecContext *avctx)
Definition: ylc.c:443
#define YLC_VLC_BITS
Definition: ylc.c:25
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: ylc.c:281
static const uint8_t table_y1[]
Definition: ylc.c:153
static const uint8_t table_y2[]
Definition: ylc.c:217
static const uint8_t table_u[]
Definition: ylc.c:185
static void get_tree_codes(uint32_t *bits, int16_t *lens, uint8_t *xlat, Node *nodes, int node, uint32_t pfx, int pl, int *pos)
Definition: ylc.c:63