Libav
utvideodec.c
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1 /*
2  * Ut Video decoder
3  * Copyright (c) 2011 Konstantin Shishkov
4  *
5  * This file is part of Libav.
6  *
7  * Libav is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * Libav is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
27 #include <inttypes.h>
28 #include <stdlib.h>
29 
30 #include "libavutil/intreadwrite.h"
31 #include "libavutil/pixdesc.h"
32 #include "avcodec.h"
33 #include "bswapdsp.h"
34 #include "bytestream.h"
35 #include "get_bits.h"
36 #include "thread.h"
37 #include "utvideo.h"
38 
39 static int build_huff(const uint8_t *src, VLC *vlc, int *fsym)
40 {
41  int i;
42  HuffEntry he[256];
43  int last;
44  uint32_t codes[256];
45  uint8_t bits[256];
46  uint8_t syms[256];
47  uint32_t code;
48 
49  *fsym = -1;
50  for (i = 0; i < 256; i++) {
51  he[i].sym = i;
52  he[i].len = *src++;
53  }
54  qsort(he, 256, sizeof(*he), ff_ut_huff_cmp_len);
55 
56  if (!he[0].len) {
57  *fsym = he[0].sym;
58  return 0;
59  }
60  if (he[0].len > 32)
61  return -1;
62 
63  last = 255;
64  while (he[last].len == 255 && last)
65  last--;
66 
67  code = 1;
68  for (i = last; i >= 0; i--) {
69  codes[i] = code >> (32 - he[i].len);
70  bits[i] = he[i].len;
71  syms[i] = he[i].sym;
72  code += 0x80000000u >> (he[i].len - 1);
73  }
74 
75  return ff_init_vlc_sparse(vlc, FFMIN(he[last].len, 9), last + 1,
76  bits, sizeof(*bits), sizeof(*bits),
77  codes, sizeof(*codes), sizeof(*codes),
78  syms, sizeof(*syms), sizeof(*syms), 0);
79 }
80 
81 static int decode_plane(UtvideoContext *c, int plane_no,
82  uint8_t *dst, int step, int stride,
83  int width, int height,
84  const uint8_t *src, int use_pred)
85 {
86  int i, j, slice, pix;
87  int sstart, send;
88  VLC vlc;
89  GetBitContext gb;
90  int prev, fsym;
91  const int cmask = ~(!plane_no && c->avctx->pix_fmt == AV_PIX_FMT_YUV420P);
92 
93  if (build_huff(src, &vlc, &fsym)) {
94  av_log(c->avctx, AV_LOG_ERROR, "Cannot build Huffman codes\n");
95  return AVERROR_INVALIDDATA;
96  }
97  if (fsym >= 0) { // build_huff reported a symbol to fill slices with
98  send = 0;
99  for (slice = 0; slice < c->slices; slice++) {
100  uint8_t *dest;
101 
102  sstart = send;
103  send = (height * (slice + 1) / c->slices) & cmask;
104  dest = dst + sstart * stride;
105 
106  prev = 0x80;
107  for (j = sstart; j < send; j++) {
108  for (i = 0; i < width * step; i += step) {
109  pix = fsym;
110  if (use_pred) {
111  prev += pix;
112  pix = prev;
113  }
114  dest[i] = pix;
115  }
116  dest += stride;
117  }
118  }
119  return 0;
120  }
121 
122  src += 256;
123 
124  send = 0;
125  for (slice = 0; slice < c->slices; slice++) {
126  uint8_t *dest;
127  int slice_data_start, slice_data_end, slice_size;
128 
129  sstart = send;
130  send = (height * (slice + 1) / c->slices) & cmask;
131  dest = dst + sstart * stride;
132 
133  // slice offset and size validation was done earlier
134  slice_data_start = slice ? AV_RL32(src + slice * 4 - 4) : 0;
135  slice_data_end = AV_RL32(src + slice * 4);
136  slice_size = slice_data_end - slice_data_start;
137 
138  if (!slice_size) {
139  av_log(c->avctx, AV_LOG_ERROR, "Plane has more than one symbol "
140  "yet a slice has a length of zero.\n");
141  goto fail;
142  }
143 
144  memcpy(c->slice_bits, src + slice_data_start + c->slices * 4,
145  slice_size);
146  memset(c->slice_bits + slice_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
147  c->bdsp.bswap_buf((uint32_t *) c->slice_bits,
148  (uint32_t *) c->slice_bits,
149  (slice_data_end - slice_data_start + 3) >> 2);
150  init_get_bits(&gb, c->slice_bits, slice_size * 8);
151 
152  prev = 0x80;
153  for (j = sstart; j < send; j++) {
154  for (i = 0; i < width * step; i += step) {
155  if (get_bits_left(&gb) <= 0) {
157  "Slice decoding ran out of bits\n");
158  goto fail;
159  }
160  pix = get_vlc2(&gb, vlc.table, vlc.bits, 4);
161  if (pix < 0) {
162  av_log(c->avctx, AV_LOG_ERROR, "Decoding error\n");
163  goto fail;
164  }
165  if (use_pred) {
166  prev += pix;
167  pix = prev;
168  }
169  dest[i] = pix;
170  }
171  dest += stride;
172  }
173  if (get_bits_left(&gb) > 32)
175  "%d bits left after decoding slice\n", get_bits_left(&gb));
176  }
177 
178  ff_free_vlc(&vlc);
179 
180  return 0;
181 fail:
182  ff_free_vlc(&vlc);
183  return AVERROR_INVALIDDATA;
184 }
185 
186 static void restore_rgb_planes(uint8_t *src, int step, int stride, int width,
187  int height)
188 {
189  int i, j;
190  uint8_t r, g, b;
191 
192  for (j = 0; j < height; j++) {
193  for (i = 0; i < width * step; i += step) {
194  r = src[i];
195  g = src[i + 1];
196  b = src[i + 2];
197  src[i] = r + g - 0x80;
198  src[i + 2] = b + g - 0x80;
199  }
200  src += stride;
201  }
202 }
203 
204 static void restore_median(uint8_t *src, int step, int stride,
205  int width, int height, int slices, int rmode)
206 {
207  int i, j, slice;
208  int A, B, C;
209  uint8_t *bsrc;
210  int slice_start, slice_height;
211  const int cmask = ~rmode;
212 
213  for (slice = 0; slice < slices; slice++) {
214  slice_start = ((slice * height) / slices) & cmask;
215  slice_height = ((((slice + 1) * height) / slices) & cmask) -
216  slice_start;
217  if (!slice_height)
218  continue;
219 
220  bsrc = src + slice_start * stride;
221 
222  // first line - left neighbour prediction
223  bsrc[0] += 0x80;
224  A = bsrc[0];
225  for (i = step; i < width * step; i += step) {
226  bsrc[i] += A;
227  A = bsrc[i];
228  }
229  bsrc += stride;
230  if (slice_height == 1)
231  continue;
232  // second line - first element has top prediction, the rest uses median
233  C = bsrc[-stride];
234  bsrc[0] += C;
235  A = bsrc[0];
236  for (i = step; i < width * step; i += step) {
237  B = bsrc[i - stride];
238  bsrc[i] += mid_pred(A, B, (uint8_t)(A + B - C));
239  C = B;
240  A = bsrc[i];
241  }
242  bsrc += stride;
243  // the rest of lines use continuous median prediction
244  for (j = 2; j < slice_height; j++) {
245  for (i = 0; i < width * step; i += step) {
246  B = bsrc[i - stride];
247  bsrc[i] += mid_pred(A, B, (uint8_t)(A + B - C));
248  C = B;
249  A = bsrc[i];
250  }
251  bsrc += stride;
252  }
253  }
254 }
255 
256 /* UtVideo interlaced mode treats every two lines as a single one,
257  * so restoring function should take care of possible padding between
258  * two parts of the same "line".
259  */
260 static void restore_median_il(uint8_t *src, int step, int stride,
261  int width, int height, int slices, int rmode)
262 {
263  int i, j, slice;
264  int A, B, C;
265  uint8_t *bsrc;
266  int slice_start, slice_height;
267  const int cmask = ~(rmode ? 3 : 1);
268  const int stride2 = stride << 1;
269 
270  for (slice = 0; slice < slices; slice++) {
271  slice_start = ((slice * height) / slices) & cmask;
272  slice_height = ((((slice + 1) * height) / slices) & cmask) -
273  slice_start;
274  slice_height >>= 1;
275  if (!slice_height)
276  continue;
277 
278  bsrc = src + slice_start * stride;
279 
280  // first line - left neighbour prediction
281  bsrc[0] += 0x80;
282  A = bsrc[0];
283  for (i = step; i < width * step; i += step) {
284  bsrc[i] += A;
285  A = bsrc[i];
286  }
287  for (i = 0; i < width * step; i += step) {
288  bsrc[stride + i] += A;
289  A = bsrc[stride + i];
290  }
291  bsrc += stride2;
292  if (slice_height == 1)
293  continue;
294  // second line - first element has top prediction, the rest uses median
295  C = bsrc[-stride2];
296  bsrc[0] += C;
297  A = bsrc[0];
298  for (i = step; i < width * step; i += step) {
299  B = bsrc[i - stride2];
300  bsrc[i] += mid_pred(A, B, (uint8_t)(A + B - C));
301  C = B;
302  A = bsrc[i];
303  }
304  for (i = 0; i < width * step; i += step) {
305  B = bsrc[i - stride];
306  bsrc[stride + i] += mid_pred(A, B, (uint8_t)(A + B - C));
307  C = B;
308  A = bsrc[stride + i];
309  }
310  bsrc += stride2;
311  // the rest of lines use continuous median prediction
312  for (j = 2; j < slice_height; j++) {
313  for (i = 0; i < width * step; i += step) {
314  B = bsrc[i - stride2];
315  bsrc[i] += mid_pred(A, B, (uint8_t)(A + B - C));
316  C = B;
317  A = bsrc[i];
318  }
319  for (i = 0; i < width * step; i += step) {
320  B = bsrc[i - stride];
321  bsrc[i + stride] += mid_pred(A, B, (uint8_t)(A + B - C));
322  C = B;
323  A = bsrc[i + stride];
324  }
325  bsrc += stride2;
326  }
327  }
328 }
329 
330 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
331  AVPacket *avpkt)
332 {
333  const uint8_t *buf = avpkt->data;
334  int buf_size = avpkt->size;
335  UtvideoContext *c = avctx->priv_data;
336  int i, j;
337  const uint8_t *plane_start[5];
338  int plane_size, max_slice_size = 0, slice_start, slice_end, slice_size;
339  int ret;
340  GetByteContext gb;
341  ThreadFrame frame = { .f = data };
342 
343  if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) {
344  av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
345  return ret;
346  }
347 
348  ff_thread_finish_setup(avctx);
349 
350  /* parse plane structure to get frame flags and validate slice offsets */
351  bytestream2_init(&gb, buf, buf_size);
352  for (i = 0; i < c->planes; i++) {
353  plane_start[i] = gb.buffer;
354  if (bytestream2_get_bytes_left(&gb) < 256 + 4 * c->slices) {
355  av_log(avctx, AV_LOG_ERROR, "Insufficient data for a plane\n");
356  return AVERROR_INVALIDDATA;
357  }
358  bytestream2_skipu(&gb, 256);
359  slice_start = 0;
360  slice_end = 0;
361  for (j = 0; j < c->slices; j++) {
362  slice_end = bytestream2_get_le32u(&gb);
363  slice_size = slice_end - slice_start;
364  if (slice_end < 0 || slice_size < 0 ||
365  bytestream2_get_bytes_left(&gb) < slice_end + 1024LL) {
366  av_log(avctx, AV_LOG_ERROR, "Incorrect slice size\n");
367  return AVERROR_INVALIDDATA;
368  }
369  slice_start = slice_end;
370  max_slice_size = FFMAX(max_slice_size, slice_size);
371  }
372  plane_size = slice_end;
373  bytestream2_skipu(&gb, plane_size);
374  }
375  plane_start[c->planes] = gb.buffer;
377  av_log(avctx, AV_LOG_ERROR, "Not enough data for frame information\n");
378  return AVERROR_INVALIDDATA;
379  }
380  c->frame_info = bytestream2_get_le32u(&gb);
381  av_log(avctx, AV_LOG_DEBUG, "frame information flags %"PRIX32"\n",
382  c->frame_info);
383 
384  c->frame_pred = (c->frame_info >> 8) & 3;
385 
386  if (c->frame_pred == PRED_GRADIENT) {
387  avpriv_request_sample(avctx, "Frame with gradient prediction");
388  return AVERROR_PATCHWELCOME;
389  }
390 
392  max_slice_size + FF_INPUT_BUFFER_PADDING_SIZE);
393 
394  if (!c->slice_bits) {
395  av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n");
396  return AVERROR(ENOMEM);
397  }
398 
399  switch (c->avctx->pix_fmt) {
400  case AV_PIX_FMT_RGB24:
401  case AV_PIX_FMT_RGBA:
402  for (i = 0; i < c->planes; i++) {
403  ret = decode_plane(c, i, frame.f->data[0] + ff_ut_rgb_order[i],
404  c->planes, frame.f->linesize[0], avctx->width,
405  avctx->height, plane_start[i],
406  c->frame_pred == PRED_LEFT);
407  if (ret)
408  return ret;
409  if (c->frame_pred == PRED_MEDIAN) {
410  if (!c->interlaced) {
411  restore_median(frame.f->data[0] + ff_ut_rgb_order[i],
412  c->planes, frame.f->linesize[0], avctx->width,
413  avctx->height, c->slices, 0);
414  } else {
415  restore_median_il(frame.f->data[0] + ff_ut_rgb_order[i],
416  c->planes, frame.f->linesize[0],
417  avctx->width, avctx->height, c->slices,
418  0);
419  }
420  }
421  }
422  restore_rgb_planes(frame.f->data[0], c->planes, frame.f->linesize[0],
423  avctx->width, avctx->height);
424  break;
425  case AV_PIX_FMT_YUV420P:
426  for (i = 0; i < 3; i++) {
427  ret = decode_plane(c, i, frame.f->data[i], 1, frame.f->linesize[i],
428  avctx->width >> !!i, avctx->height >> !!i,
429  plane_start[i], c->frame_pred == PRED_LEFT);
430  if (ret)
431  return ret;
432  if (c->frame_pred == PRED_MEDIAN) {
433  if (!c->interlaced) {
434  restore_median(frame.f->data[i], 1, frame.f->linesize[i],
435  avctx->width >> !!i, avctx->height >> !!i,
436  c->slices, !i);
437  } else {
438  restore_median_il(frame.f->data[i], 1, frame.f->linesize[i],
439  avctx->width >> !!i,
440  avctx->height >> !!i,
441  c->slices, !i);
442  }
443  }
444  }
445  break;
446  case AV_PIX_FMT_YUV422P:
447  for (i = 0; i < 3; i++) {
448  ret = decode_plane(c, i, frame.f->data[i], 1, frame.f->linesize[i],
449  avctx->width >> !!i, avctx->height,
450  plane_start[i], c->frame_pred == PRED_LEFT);
451  if (ret)
452  return ret;
453  if (c->frame_pred == PRED_MEDIAN) {
454  if (!c->interlaced) {
455  restore_median(frame.f->data[i], 1, frame.f->linesize[i],
456  avctx->width >> !!i, avctx->height,
457  c->slices, 0);
458  } else {
459  restore_median_il(frame.f->data[i], 1, frame.f->linesize[i],
460  avctx->width >> !!i, avctx->height,
461  c->slices, 0);
462  }
463  }
464  }
465  break;
466  }
467 
468  frame.f->key_frame = 1;
469  frame.f->pict_type = AV_PICTURE_TYPE_I;
470  frame.f->interlaced_frame = !!c->interlaced;
471 
472  *got_frame = 1;
473 
474  /* always report that the buffer was completely consumed */
475  return buf_size;
476 }
477 
479 {
480  UtvideoContext * const c = avctx->priv_data;
481  int h_shift, v_shift;
482 
483  c->avctx = avctx;
484 
485  ff_bswapdsp_init(&c->bdsp);
486 
487  if (avctx->extradata_size < 16) {
488  av_log(avctx, AV_LOG_ERROR,
489  "Insufficient extradata size %d, should be at least 16\n",
490  avctx->extradata_size);
491  return AVERROR_INVALIDDATA;
492  }
493 
494  av_log(avctx, AV_LOG_DEBUG, "Encoder version %d.%d.%d.%d\n",
495  avctx->extradata[3], avctx->extradata[2],
496  avctx->extradata[1], avctx->extradata[0]);
497  av_log(avctx, AV_LOG_DEBUG, "Original format %"PRIX32"\n",
498  AV_RB32(avctx->extradata + 4));
499  c->frame_info_size = AV_RL32(avctx->extradata + 8);
500  c->flags = AV_RL32(avctx->extradata + 12);
501 
502  if (c->frame_info_size != 4)
503  avpriv_request_sample(avctx, "Frame info not 4 bytes");
504  av_log(avctx, AV_LOG_DEBUG, "Encoding parameters %08"PRIX32"\n", c->flags);
505  c->slices = (c->flags >> 24) + 1;
506  c->compression = c->flags & 1;
507  c->interlaced = c->flags & 0x800;
508 
509  c->slice_bits_size = 0;
510 
511  switch (avctx->codec_tag) {
512  case MKTAG('U', 'L', 'R', 'G'):
513  c->planes = 3;
514  avctx->pix_fmt = AV_PIX_FMT_RGB24;
515  break;
516  case MKTAG('U', 'L', 'R', 'A'):
517  c->planes = 4;
518  avctx->pix_fmt = AV_PIX_FMT_RGBA;
519  break;
520  case MKTAG('U', 'L', 'Y', '0'):
521  c->planes = 3;
522  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
523  avctx->colorspace = AVCOL_SPC_BT470BG;
524  break;
525  case MKTAG('U', 'L', 'Y', '2'):
526  c->planes = 3;
527  avctx->pix_fmt = AV_PIX_FMT_YUV422P;
528  avctx->colorspace = AVCOL_SPC_BT470BG;
529  break;
530  case MKTAG('U', 'L', 'H', '0'):
531  c->planes = 3;
532  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
533  avctx->colorspace = AVCOL_SPC_BT709;
534  break;
535  case MKTAG('U', 'L', 'H', '2'):
536  c->planes = 3;
537  avctx->pix_fmt = AV_PIX_FMT_YUV422P;
538  avctx->colorspace = AVCOL_SPC_BT709;
539  break;
540  default:
541  av_log(avctx, AV_LOG_ERROR, "Unknown Ut Video FOURCC provided (%08X)\n",
542  avctx->codec_tag);
543  return AVERROR_INVALIDDATA;
544  }
545 
546  av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &h_shift, &v_shift);
547  if ((avctx->width & ((1<<h_shift)-1)) ||
548  (avctx->height & ((1<<v_shift)-1))) {
549  avpriv_request_sample(avctx, "Odd dimensions");
550  return AVERROR_PATCHWELCOME;
551  }
552 
553  return 0;
554 }
555 
557 {
558  UtvideoContext * const c = avctx->priv_data;
559 
560  av_freep(&c->slice_bits);
561 
562  return 0;
563 }
564 
566  .name = "utvideo",
567  .long_name = NULL_IF_CONFIG_SMALL("Ut Video"),
568  .type = AVMEDIA_TYPE_VIDEO,
569  .id = AV_CODEC_ID_UTVIDEO,
570  .priv_data_size = sizeof(UtvideoContext),
571  .init = decode_init,
572  .close = decode_end,
573  .decode = decode_frame,
574  .capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,
575 };
static void restore_median(uint8_t *src, int step, int stride, int width, int height, int slices, int rmode)
Definition: utvideodec.c:204
void(* bswap_buf)(uint32_t *dst, const uint32_t *src, int w)
Definition: bswapdsp.h:25
also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
Definition: pixfmt.h:346
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
uint32_t flags
Definition: utvideo.h:72
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:129
AVFrame * f
Definition: thread.h:36
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:67
also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601 ...
Definition: pixfmt.h:350
int slice_bits_size
Definition: utvideo.h:81
int size
Definition: avcodec.h:974
static int decode_plane(UtvideoContext *c, int plane_no, uint8_t *dst, int step, int stride, int width, int height, const uint8_t *src, int use_pred)
Definition: utvideodec.c:81
static av_cold int decode_end(AVCodecContext *avctx)
Definition: utvideodec.c:556
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1270
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:132
int stride
Definition: mace.c:144
AVCodec.
Definition: avcodec.h:2812
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:198
int interlaced
Definition: utvideo.h:76
static int decode(MimicContext *ctx, int quality, int num_coeffs, int is_iframe)
Definition: mimic.c:275
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
int ff_init_vlc_sparse(VLC *vlc, 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:266
uint8_t bits
Definition: crc.c:251
uint8_t
#define av_cold
Definition: attributes.h:66
#define AV_RB32
Definition: intreadwrite.h:130
Multithreading support functions.
#define b
Definition: input.c:52
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1164
uint32_t frame_info
Definition: utvideo.h:72
static void restore_median_il(uint8_t *src, int step, int stride, int width, int height, int slices, int rmode)
Definition: utvideodec.c:260
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:684
const char data[16]
Definition: mxf.c:70
uint8_t * data
Definition: avcodec.h:973
const uint8_t * buffer
Definition: bytestream.h:33
static av_always_inline void bytestream2_skipu(GetByteContext *g, unsigned int size)
Definition: bytestream.h:167
bitstream reader API header.
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:320
#define B
Definition: huffyuv.h:49
void ff_thread_finish_setup(AVCodecContext *avctx)
If the codec defines update_thread_context(), call this when they are ready for the next thread to st...
const int ff_ut_rgb_order[4]
Definition: utvideo.c:33
#define r
Definition: input.c:51
static int build_huff(const uint8_t *src, VLC *vlc, int *fsym)
Definition: utvideodec.c:39
BswapDSPContext bdsp
Definition: utvideo.h:69
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:555
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
static av_cold int decode_init(AVCodecContext *avctx)
Definition: utvideodec.c:478
#define AVERROR(e)
Definition: error.h:43
uint8_t sym
Definition: utvideo.h:85
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:145
AVCodecContext * avctx
Definition: utvideo.h:68
g
Definition: yuv2rgb.c:535
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:144
static av_always_inline unsigned int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:151
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:169
const char * name
Name of the codec implementation.
Definition: avcodec.h:2819
uint32_t frame_info_size
Definition: utvideo.h:72
#define FFMAX(a, b)
Definition: common.h:55
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:96
Definition: get_bits.h:64
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:69
av_cold void ff_bswapdsp_init(BswapDSPContext *c)
Definition: bswapdsp.c:49
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:531
int compression
Definition: utvideo.h:75
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:196
#define FFMIN(a, b)
Definition: common.h:57
int width
picture width / height.
Definition: avcodec.h:1229
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:522
#define AV_RL32
Definition: intreadwrite.h:146
int bits
Definition: get_bits.h:65
#define AVERROR_PATCHWELCOME
Not yet implemented in Libav, patches welcome.
Definition: error.h:57
static void restore_rgb_planes(uint8_t *src, int step, int stride, int width, int height)
Definition: utvideodec.c:186
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: utvideodec.c:330
Common Ut Video header.
static int width
Definition: utils.c:156
int frame_pred
Definition: utvideo.h:77
uint8_t len
Definition: utvideo.h:86
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:153
int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
Wrapper around get_buffer() for frame-multithreaded codecs.
main external API structure.
Definition: avcodec.h:1050
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:490
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1082
int extradata_size
Definition: avcodec.h:1165
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:1775
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:375
#define mid_pred
Definition: mathops.h:98
static int step
Definition: avplay.c:247
Definition: vf_drawbox.c:37
uint8_t * slice_bits
Definition: utvideo.h:80
int ff_ut_huff_cmp_len(const void *a, const void *b)
Definition: utvideo.c:35
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:141
int height
Definition: gxfenc.c:72
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:388
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:65
#define CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:755
FF_ENABLE_DEPRECATION_WARNINGS int av_pix_fmt_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift)
Utility function to access log2_chroma_w log2_chroma_h from the pixel format AVPixFmtDescriptor.
Definition: pixdesc.c:1625
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:499
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2017
void * priv_data
Definition: avcodec.h:1092
int len
VLC_TYPE(* table)[2]
code, bits
Definition: get_bits.h:66
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:191
#define MKTAG(a, b, c, d)
Definition: common.h:238
AVCodec ff_utvideo_decoder
Definition: utvideodec.c:565
This structure stores compressed data.
Definition: avcodec.h:950
void ff_free_vlc(VLC *vlc)
Definition: bitstream.c:333