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 "avcodec.h"
32 #include "bswapdsp.h"
33 #include "bytestream.h"
34 #include "get_bits.h"
35 #include "thread.h"
36 #include "utvideo.h"
37 
38 static int build_huff(const uint8_t *src, VLC *vlc, int *fsym)
39 {
40  int i;
41  HuffEntry he[256];
42  int last;
43  uint32_t codes[256];
44  uint8_t bits[256];
45  uint8_t syms[256];
46  uint32_t code;
47 
48  *fsym = -1;
49  for (i = 0; i < 256; i++) {
50  he[i].sym = i;
51  he[i].len = *src++;
52  }
53  qsort(he, 256, sizeof(*he), ff_ut_huff_cmp_len);
54 
55  if (!he[0].len) {
56  *fsym = he[0].sym;
57  return 0;
58  }
59  if (he[0].len > 32)
60  return -1;
61 
62  last = 255;
63  while (he[last].len == 255 && last)
64  last--;
65 
66  code = 1;
67  for (i = last; i >= 0; i--) {
68  codes[i] = code >> (32 - he[i].len);
69  bits[i] = he[i].len;
70  syms[i] = he[i].sym;
71  code += 0x80000000u >> (he[i].len - 1);
72  }
73 
74  return ff_init_vlc_sparse(vlc, FFMIN(he[last].len, 9), last + 1,
75  bits, sizeof(*bits), sizeof(*bits),
76  codes, sizeof(*codes), sizeof(*codes),
77  syms, sizeof(*syms), sizeof(*syms), 0);
78 }
79 
80 static int decode_plane(UtvideoContext *c, int plane_no,
81  uint8_t *dst, int step, int stride,
82  int width, int height,
83  const uint8_t *src, int use_pred)
84 {
85  int i, j, slice, pix;
86  int sstart, send;
87  VLC vlc;
88  GetBitContext gb;
89  int prev, fsym;
90  const int cmask = ~(!plane_no && c->avctx->pix_fmt == AV_PIX_FMT_YUV420P);
91 
92  if (build_huff(src, &vlc, &fsym)) {
93  av_log(c->avctx, AV_LOG_ERROR, "Cannot build Huffman codes\n");
94  return AVERROR_INVALIDDATA;
95  }
96  if (fsym >= 0) { // build_huff reported a symbol to fill slices with
97  send = 0;
98  for (slice = 0; slice < c->slices; slice++) {
99  uint8_t *dest;
100 
101  sstart = send;
102  send = (height * (slice + 1) / c->slices) & cmask;
103  dest = dst + sstart * stride;
104 
105  prev = 0x80;
106  for (j = sstart; j < send; j++) {
107  for (i = 0; i < width * step; i += step) {
108  pix = fsym;
109  if (use_pred) {
110  prev += pix;
111  pix = prev;
112  }
113  dest[i] = pix;
114  }
115  dest += stride;
116  }
117  }
118  return 0;
119  }
120 
121  src += 256;
122 
123  send = 0;
124  for (slice = 0; slice < c->slices; slice++) {
125  uint8_t *dest;
126  int slice_data_start, slice_data_end, slice_size;
127 
128  sstart = send;
129  send = (height * (slice + 1) / c->slices) & cmask;
130  dest = dst + sstart * stride;
131 
132  // slice offset and size validation was done earlier
133  slice_data_start = slice ? AV_RL32(src + slice * 4 - 4) : 0;
134  slice_data_end = AV_RL32(src + slice * 4);
135  slice_size = slice_data_end - slice_data_start;
136 
137  if (!slice_size) {
138  av_log(c->avctx, AV_LOG_ERROR, "Plane has more than one symbol "
139  "yet a slice has a length of zero.\n");
140  goto fail;
141  }
142 
143  memcpy(c->slice_bits, src + slice_data_start + c->slices * 4,
144  slice_size);
145  memset(c->slice_bits + slice_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
146  c->bdsp.bswap_buf((uint32_t *) c->slice_bits,
147  (uint32_t *) c->slice_bits,
148  (slice_data_end - slice_data_start + 3) >> 2);
149  init_get_bits(&gb, c->slice_bits, slice_size * 8);
150 
151  prev = 0x80;
152  for (j = sstart; j < send; j++) {
153  for (i = 0; i < width * step; i += step) {
154  if (get_bits_left(&gb) <= 0) {
156  "Slice decoding ran out of bits\n");
157  goto fail;
158  }
159  pix = get_vlc2(&gb, vlc.table, vlc.bits, 4);
160  if (pix < 0) {
161  av_log(c->avctx, AV_LOG_ERROR, "Decoding error\n");
162  goto fail;
163  }
164  if (use_pred) {
165  prev += pix;
166  pix = prev;
167  }
168  dest[i] = pix;
169  }
170  dest += stride;
171  }
172  if (get_bits_left(&gb) > 32)
174  "%d bits left after decoding slice\n", get_bits_left(&gb));
175  }
176 
177  ff_free_vlc(&vlc);
178 
179  return 0;
180 fail:
181  ff_free_vlc(&vlc);
182  return AVERROR_INVALIDDATA;
183 }
184 
185 static void restore_rgb_planes(uint8_t *src, int step, int stride, int width,
186  int height)
187 {
188  int i, j;
189  uint8_t r, g, b;
190 
191  for (j = 0; j < height; j++) {
192  for (i = 0; i < width * step; i += step) {
193  r = src[i];
194  g = src[i + 1];
195  b = src[i + 2];
196  src[i] = r + g - 0x80;
197  src[i + 2] = b + g - 0x80;
198  }
199  src += stride;
200  }
201 }
202 
203 static void restore_median(uint8_t *src, int step, int stride,
204  int width, int height, int slices, int rmode)
205 {
206  int i, j, slice;
207  int A, B, C;
208  uint8_t *bsrc;
209  int slice_start, slice_height;
210  const int cmask = ~rmode;
211 
212  for (slice = 0; slice < slices; slice++) {
213  slice_start = ((slice * height) / slices) & cmask;
214  slice_height = ((((slice + 1) * height) / slices) & cmask) -
215  slice_start;
216 
217  bsrc = src + slice_start * stride;
218 
219  // first line - left neighbour prediction
220  bsrc[0] += 0x80;
221  A = bsrc[0];
222  for (i = step; i < width * step; i += step) {
223  bsrc[i] += A;
224  A = bsrc[i];
225  }
226  bsrc += stride;
227  if (slice_height == 1)
228  continue;
229  // second line - first element has top prediction, the rest uses median
230  C = bsrc[-stride];
231  bsrc[0] += C;
232  A = bsrc[0];
233  for (i = step; i < width * step; i += step) {
234  B = bsrc[i - stride];
235  bsrc[i] += mid_pred(A, B, (uint8_t)(A + B - C));
236  C = B;
237  A = bsrc[i];
238  }
239  bsrc += stride;
240  // the rest of lines use continuous median prediction
241  for (j = 2; j < slice_height; j++) {
242  for (i = 0; i < width * step; i += step) {
243  B = bsrc[i - stride];
244  bsrc[i] += mid_pred(A, B, (uint8_t)(A + B - C));
245  C = B;
246  A = bsrc[i];
247  }
248  bsrc += stride;
249  }
250  }
251 }
252 
253 /* UtVideo interlaced mode treats every two lines as a single one,
254  * so restoring function should take care of possible padding between
255  * two parts of the same "line".
256  */
257 static void restore_median_il(uint8_t *src, int step, int stride,
258  int width, int height, int slices, int rmode)
259 {
260  int i, j, slice;
261  int A, B, C;
262  uint8_t *bsrc;
263  int slice_start, slice_height;
264  const int cmask = ~(rmode ? 3 : 1);
265  const int stride2 = stride << 1;
266 
267  for (slice = 0; slice < slices; slice++) {
268  slice_start = ((slice * height) / slices) & cmask;
269  slice_height = ((((slice + 1) * height) / slices) & cmask) -
270  slice_start;
271  slice_height >>= 1;
272 
273  bsrc = src + slice_start * stride;
274 
275  // first line - left neighbour prediction
276  bsrc[0] += 0x80;
277  A = bsrc[0];
278  for (i = step; i < width * step; i += step) {
279  bsrc[i] += A;
280  A = bsrc[i];
281  }
282  for (i = 0; i < width * step; i += step) {
283  bsrc[stride + i] += A;
284  A = bsrc[stride + i];
285  }
286  bsrc += stride2;
287  if (slice_height == 1)
288  continue;
289  // second line - first element has top prediction, the rest uses median
290  C = bsrc[-stride2];
291  bsrc[0] += C;
292  A = bsrc[0];
293  for (i = step; i < width * step; i += step) {
294  B = bsrc[i - stride2];
295  bsrc[i] += mid_pred(A, B, (uint8_t)(A + B - C));
296  C = B;
297  A = bsrc[i];
298  }
299  for (i = 0; i < width * step; i += step) {
300  B = bsrc[i - stride];
301  bsrc[stride + i] += mid_pred(A, B, (uint8_t)(A + B - C));
302  C = B;
303  A = bsrc[stride + i];
304  }
305  bsrc += stride2;
306  // the rest of lines use continuous median prediction
307  for (j = 2; j < slice_height; j++) {
308  for (i = 0; i < width * step; i += step) {
309  B = bsrc[i - stride2];
310  bsrc[i] += mid_pred(A, B, (uint8_t)(A + B - C));
311  C = B;
312  A = bsrc[i];
313  }
314  for (i = 0; i < width * step; i += step) {
315  B = bsrc[i - stride];
316  bsrc[i + stride] += mid_pred(A, B, (uint8_t)(A + B - C));
317  C = B;
318  A = bsrc[i + stride];
319  }
320  bsrc += stride2;
321  }
322  }
323 }
324 
325 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
326  AVPacket *avpkt)
327 {
328  const uint8_t *buf = avpkt->data;
329  int buf_size = avpkt->size;
330  UtvideoContext *c = avctx->priv_data;
331  int i, j;
332  const uint8_t *plane_start[5];
333  int plane_size, max_slice_size = 0, slice_start, slice_end, slice_size;
334  int ret;
335  GetByteContext gb;
336  ThreadFrame frame = { .f = data };
337 
338  if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) {
339  av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
340  return ret;
341  }
342 
343  ff_thread_finish_setup(avctx);
344 
345  /* parse plane structure to get frame flags and validate slice offsets */
346  bytestream2_init(&gb, buf, buf_size);
347  for (i = 0; i < c->planes; i++) {
348  plane_start[i] = gb.buffer;
349  if (bytestream2_get_bytes_left(&gb) < 256 + 4 * c->slices) {
350  av_log(avctx, AV_LOG_ERROR, "Insufficient data for a plane\n");
351  return AVERROR_INVALIDDATA;
352  }
353  bytestream2_skipu(&gb, 256);
354  slice_start = 0;
355  slice_end = 0;
356  for (j = 0; j < c->slices; j++) {
357  slice_end = bytestream2_get_le32u(&gb);
358  slice_size = slice_end - slice_start;
359  if (slice_end < 0 || slice_size < 0 ||
360  bytestream2_get_bytes_left(&gb) < slice_end) {
361  av_log(avctx, AV_LOG_ERROR, "Incorrect slice size\n");
362  return AVERROR_INVALIDDATA;
363  }
364  slice_start = slice_end;
365  max_slice_size = FFMAX(max_slice_size, slice_size);
366  }
367  plane_size = slice_end;
368  bytestream2_skipu(&gb, plane_size);
369  }
370  plane_start[c->planes] = gb.buffer;
372  av_log(avctx, AV_LOG_ERROR, "Not enough data for frame information\n");
373  return AVERROR_INVALIDDATA;
374  }
375  c->frame_info = bytestream2_get_le32u(&gb);
376  av_log(avctx, AV_LOG_DEBUG, "frame information flags %"PRIX32"\n",
377  c->frame_info);
378 
379  c->frame_pred = (c->frame_info >> 8) & 3;
380 
381  if (c->frame_pred == PRED_GRADIENT) {
382  avpriv_request_sample(avctx, "Frame with gradient prediction");
383  return AVERROR_PATCHWELCOME;
384  }
385 
387  max_slice_size + FF_INPUT_BUFFER_PADDING_SIZE);
388 
389  if (!c->slice_bits) {
390  av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n");
391  return AVERROR(ENOMEM);
392  }
393 
394  switch (c->avctx->pix_fmt) {
395  case AV_PIX_FMT_RGB24:
396  case AV_PIX_FMT_RGBA:
397  for (i = 0; i < c->planes; i++) {
398  ret = decode_plane(c, i, frame.f->data[0] + ff_ut_rgb_order[i],
399  c->planes, frame.f->linesize[0], avctx->width,
400  avctx->height, plane_start[i],
401  c->frame_pred == PRED_LEFT);
402  if (ret)
403  return ret;
404  if (c->frame_pred == PRED_MEDIAN) {
405  if (!c->interlaced) {
406  restore_median(frame.f->data[0] + ff_ut_rgb_order[i],
407  c->planes, frame.f->linesize[0], avctx->width,
408  avctx->height, c->slices, 0);
409  } else {
410  restore_median_il(frame.f->data[0] + ff_ut_rgb_order[i],
411  c->planes, frame.f->linesize[0],
412  avctx->width, avctx->height, c->slices,
413  0);
414  }
415  }
416  }
417  restore_rgb_planes(frame.f->data[0], c->planes, frame.f->linesize[0],
418  avctx->width, avctx->height);
419  break;
420  case AV_PIX_FMT_YUV420P:
421  for (i = 0; i < 3; i++) {
422  ret = decode_plane(c, i, frame.f->data[i], 1, frame.f->linesize[i],
423  avctx->width >> !!i, avctx->height >> !!i,
424  plane_start[i], c->frame_pred == PRED_LEFT);
425  if (ret)
426  return ret;
427  if (c->frame_pred == PRED_MEDIAN) {
428  if (!c->interlaced) {
429  restore_median(frame.f->data[i], 1, frame.f->linesize[i],
430  avctx->width >> !!i, avctx->height >> !!i,
431  c->slices, !i);
432  } else {
433  restore_median_il(frame.f->data[i], 1, frame.f->linesize[i],
434  avctx->width >> !!i,
435  avctx->height >> !!i,
436  c->slices, !i);
437  }
438  }
439  }
440  break;
441  case AV_PIX_FMT_YUV422P:
442  for (i = 0; i < 3; i++) {
443  ret = decode_plane(c, i, frame.f->data[i], 1, frame.f->linesize[i],
444  avctx->width >> !!i, avctx->height,
445  plane_start[i], c->frame_pred == PRED_LEFT);
446  if (ret)
447  return ret;
448  if (c->frame_pred == PRED_MEDIAN) {
449  if (!c->interlaced) {
450  restore_median(frame.f->data[i], 1, frame.f->linesize[i],
451  avctx->width >> !!i, avctx->height,
452  c->slices, 0);
453  } else {
454  restore_median_il(frame.f->data[i], 1, frame.f->linesize[i],
455  avctx->width >> !!i, avctx->height,
456  c->slices, 0);
457  }
458  }
459  }
460  break;
461  }
462 
463  frame.f->key_frame = 1;
464  frame.f->pict_type = AV_PICTURE_TYPE_I;
465  frame.f->interlaced_frame = !!c->interlaced;
466 
467  *got_frame = 1;
468 
469  /* always report that the buffer was completely consumed */
470  return buf_size;
471 }
472 
474 {
475  UtvideoContext * const c = avctx->priv_data;
476 
477  c->avctx = avctx;
478 
479  ff_bswapdsp_init(&c->bdsp);
480 
481  if (avctx->extradata_size < 16) {
482  av_log(avctx, AV_LOG_ERROR,
483  "Insufficient extradata size %d, should be at least 16\n",
484  avctx->extradata_size);
485  return AVERROR_INVALIDDATA;
486  }
487 
488  av_log(avctx, AV_LOG_DEBUG, "Encoder version %d.%d.%d.%d\n",
489  avctx->extradata[3], avctx->extradata[2],
490  avctx->extradata[1], avctx->extradata[0]);
491  av_log(avctx, AV_LOG_DEBUG, "Original format %"PRIX32"\n",
492  AV_RB32(avctx->extradata + 4));
493  c->frame_info_size = AV_RL32(avctx->extradata + 8);
494  c->flags = AV_RL32(avctx->extradata + 12);
495 
496  if (c->frame_info_size != 4)
497  avpriv_request_sample(avctx, "Frame info not 4 bytes");
498  av_log(avctx, AV_LOG_DEBUG, "Encoding parameters %08"PRIX32"\n", c->flags);
499  c->slices = (c->flags >> 24) + 1;
500  c->compression = c->flags & 1;
501  c->interlaced = c->flags & 0x800;
502 
503  c->slice_bits_size = 0;
504 
505  switch (avctx->codec_tag) {
506  case MKTAG('U', 'L', 'R', 'G'):
507  c->planes = 3;
508  avctx->pix_fmt = AV_PIX_FMT_RGB24;
509  break;
510  case MKTAG('U', 'L', 'R', 'A'):
511  c->planes = 4;
512  avctx->pix_fmt = AV_PIX_FMT_RGBA;
513  break;
514  case MKTAG('U', 'L', 'Y', '0'):
515  c->planes = 3;
516  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
517  avctx->colorspace = AVCOL_SPC_BT470BG;
518  break;
519  case MKTAG('U', 'L', 'Y', '2'):
520  c->planes = 3;
521  avctx->pix_fmt = AV_PIX_FMT_YUV422P;
522  avctx->colorspace = AVCOL_SPC_BT470BG;
523  break;
524  case MKTAG('U', 'L', 'H', '0'):
525  c->planes = 3;
526  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
527  avctx->colorspace = AVCOL_SPC_BT709;
528  break;
529  case MKTAG('U', 'L', 'H', '2'):
530  c->planes = 3;
531  avctx->pix_fmt = AV_PIX_FMT_YUV422P;
532  avctx->colorspace = AVCOL_SPC_BT709;
533  break;
534  default:
535  av_log(avctx, AV_LOG_ERROR, "Unknown Ut Video FOURCC provided (%08X)\n",
536  avctx->codec_tag);
537  return AVERROR_INVALIDDATA;
538  }
539 
540  return 0;
541 }
542 
544 {
545  UtvideoContext * const c = avctx->priv_data;
546 
547  av_freep(&c->slice_bits);
548 
549  return 0;
550 }
551 
553  .name = "utvideo",
554  .long_name = NULL_IF_CONFIG_SMALL("Ut Video"),
555  .type = AVMEDIA_TYPE_VIDEO,
556  .id = AV_CODEC_ID_UTVIDEO,
557  .priv_data_size = sizeof(UtvideoContext),
558  .init = decode_init,
559  .close = decode_end,
560  .decode = decode_frame,
561  .capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,
562 };
static void restore_median(uint8_t *src, int step, int stride, int width, int height, int slices, int rmode)
Definition: utvideodec.c:203
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:80
static av_cold int decode_end(AVCodecContext *avctx)
Definition: utvideodec.c:543
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1254
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:130
int stride
Definition: mace.c:144
AVCodec.
Definition: avcodec.h:2796
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:257
#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:165
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:38
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:473
#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:150
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:149
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:168
const char * name
Name of the codec implementation.
Definition: avcodec.h:2803
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:1224
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
Definition: vf_drawbox.c:37
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:185
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: utvideodec.c:325
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:1759
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
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
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:2005
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:552
This structure stores compressed data.
Definition: avcodec.h:950
void ff_free_vlc(VLC *vlc)
Definition: bitstream.c:333