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 <stdlib.h>
28 
29 #include "libavutil/intreadwrite.h"
30 #include "avcodec.h"
31 #include "bytestream.h"
32 #include "get_bits.h"
33 #include "dsputil.h"
34 #include "thread.h"
35 #include "utvideo.h"
36 
37 static int build_huff(const uint8_t *src, VLC *vlc, int *fsym)
38 {
39  int i;
40  HuffEntry he[256];
41  int last;
42  uint32_t codes[256];
43  uint8_t bits[256];
44  uint8_t syms[256];
45  uint32_t code;
46 
47  *fsym = -1;
48  for (i = 0; i < 256; i++) {
49  he[i].sym = i;
50  he[i].len = *src++;
51  }
52  qsort(he, 256, sizeof(*he), ff_ut_huff_cmp_len);
53 
54  if (!he[0].len) {
55  *fsym = he[0].sym;
56  return 0;
57  }
58  if (he[0].len > 32)
59  return -1;
60 
61  last = 255;
62  while (he[last].len == 255 && last)
63  last--;
64 
65  code = 1;
66  for (i = last; i >= 0; i--) {
67  codes[i] = code >> (32 - he[i].len);
68  bits[i] = he[i].len;
69  syms[i] = he[i].sym;
70  code += 0x80000000u >> (he[i].len - 1);
71  }
72 
73  return ff_init_vlc_sparse(vlc, FFMIN(he[last].len, 9), last + 1,
74  bits, sizeof(*bits), sizeof(*bits),
75  codes, sizeof(*codes), sizeof(*codes),
76  syms, sizeof(*syms), sizeof(*syms), 0);
77 }
78 
79 static int decode_plane(UtvideoContext *c, int plane_no,
80  uint8_t *dst, int step, int stride,
81  int width, int height,
82  const uint8_t *src, int use_pred)
83 {
84  int i, j, slice, pix;
85  int sstart, send;
86  VLC vlc;
87  GetBitContext gb;
88  int prev, fsym;
89  const int cmask = ~(!plane_no && c->avctx->pix_fmt == AV_PIX_FMT_YUV420P);
90 
91  if (build_huff(src, &vlc, &fsym)) {
92  av_log(c->avctx, AV_LOG_ERROR, "Cannot build Huffman codes\n");
93  return AVERROR_INVALIDDATA;
94  }
95  if (fsym >= 0) { // build_huff reported a symbol to fill slices with
96  send = 0;
97  for (slice = 0; slice < c->slices; slice++) {
98  uint8_t *dest;
99 
100  sstart = send;
101  send = (height * (slice + 1) / c->slices) & cmask;
102  dest = dst + sstart * stride;
103 
104  prev = 0x80;
105  for (j = sstart; j < send; j++) {
106  for (i = 0; i < width * step; i += step) {
107  pix = fsym;
108  if (use_pred) {
109  prev += pix;
110  pix = prev;
111  }
112  dest[i] = pix;
113  }
114  dest += stride;
115  }
116  }
117  return 0;
118  }
119 
120  src += 256;
121 
122  send = 0;
123  for (slice = 0; slice < c->slices; slice++) {
124  uint8_t *dest;
125  int slice_data_start, slice_data_end, slice_size;
126 
127  sstart = send;
128  send = (height * (slice + 1) / c->slices) & cmask;
129  dest = dst + sstart * stride;
130 
131  // slice offset and size validation was done earlier
132  slice_data_start = slice ? AV_RL32(src + slice * 4 - 4) : 0;
133  slice_data_end = AV_RL32(src + slice * 4);
134  slice_size = slice_data_end - slice_data_start;
135 
136  if (!slice_size) {
137  av_log(c->avctx, AV_LOG_ERROR, "Plane has more than one symbol "
138  "yet a slice has a length of zero.\n");
139  goto fail;
140  }
141 
142  memcpy(c->slice_bits, src + slice_data_start + c->slices * 4,
143  slice_size);
144  memset(c->slice_bits + slice_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
145  c->dsp.bswap_buf((uint32_t *) c->slice_bits, (uint32_t *) c->slice_bits,
146  (slice_data_end - slice_data_start + 3) >> 2);
147  init_get_bits(&gb, c->slice_bits, slice_size * 8);
148 
149  prev = 0x80;
150  for (j = sstart; j < send; j++) {
151  for (i = 0; i < width * step; i += step) {
152  if (get_bits_left(&gb) <= 0) {
154  "Slice decoding ran out of bits\n");
155  goto fail;
156  }
157  pix = get_vlc2(&gb, vlc.table, vlc.bits, 4);
158  if (pix < 0) {
159  av_log(c->avctx, AV_LOG_ERROR, "Decoding error\n");
160  goto fail;
161  }
162  if (use_pred) {
163  prev += pix;
164  pix = prev;
165  }
166  dest[i] = pix;
167  }
168  dest += stride;
169  }
170  if (get_bits_left(&gb) > 32)
172  "%d bits left after decoding slice\n", get_bits_left(&gb));
173  }
174 
175  ff_free_vlc(&vlc);
176 
177  return 0;
178 fail:
179  ff_free_vlc(&vlc);
180  return AVERROR_INVALIDDATA;
181 }
182 
183 static void restore_rgb_planes(uint8_t *src, int step, int stride, int width,
184  int height)
185 {
186  int i, j;
187  uint8_t r, g, b;
188 
189  for (j = 0; j < height; j++) {
190  for (i = 0; i < width * step; i += step) {
191  r = src[i];
192  g = src[i + 1];
193  b = src[i + 2];
194  src[i] = r + g - 0x80;
195  src[i + 2] = b + g - 0x80;
196  }
197  src += stride;
198  }
199 }
200 
201 static void restore_median(uint8_t *src, int step, int stride,
202  int width, int height, int slices, int rmode)
203 {
204  int i, j, slice;
205  int A, B, C;
206  uint8_t *bsrc;
207  int slice_start, slice_height;
208  const int cmask = ~rmode;
209 
210  for (slice = 0; slice < slices; slice++) {
211  slice_start = ((slice * height) / slices) & cmask;
212  slice_height = ((((slice + 1) * height) / slices) & cmask) -
213  slice_start;
214 
215  bsrc = src + slice_start * stride;
216 
217  // first line - left neighbour prediction
218  bsrc[0] += 0x80;
219  A = bsrc[0];
220  for (i = step; i < width * step; i += step) {
221  bsrc[i] += A;
222  A = bsrc[i];
223  }
224  bsrc += stride;
225  if (slice_height == 1)
226  continue;
227  // second line - first element has top prediction, the rest uses median
228  C = bsrc[-stride];
229  bsrc[0] += C;
230  A = bsrc[0];
231  for (i = step; i < width * step; i += step) {
232  B = bsrc[i - stride];
233  bsrc[i] += mid_pred(A, B, (uint8_t)(A + B - C));
234  C = B;
235  A = bsrc[i];
236  }
237  bsrc += stride;
238  // the rest of lines use continuous median prediction
239  for (j = 2; j < slice_height; j++) {
240  for (i = 0; i < width * step; i += step) {
241  B = bsrc[i - stride];
242  bsrc[i] += mid_pred(A, B, (uint8_t)(A + B - C));
243  C = B;
244  A = bsrc[i];
245  }
246  bsrc += stride;
247  }
248  }
249 }
250 
251 /* UtVideo interlaced mode treats every two lines as a single one,
252  * so restoring function should take care of possible padding between
253  * two parts of the same "line".
254  */
255 static void restore_median_il(uint8_t *src, int step, int stride,
256  int width, int height, int slices, int rmode)
257 {
258  int i, j, slice;
259  int A, B, C;
260  uint8_t *bsrc;
261  int slice_start, slice_height;
262  const int cmask = ~(rmode ? 3 : 1);
263  const int stride2 = stride << 1;
264 
265  for (slice = 0; slice < slices; slice++) {
266  slice_start = ((slice * height) / slices) & cmask;
267  slice_height = ((((slice + 1) * height) / slices) & cmask) -
268  slice_start;
269  slice_height >>= 1;
270 
271  bsrc = src + slice_start * stride;
272 
273  // first line - left neighbour prediction
274  bsrc[0] += 0x80;
275  A = bsrc[0];
276  for (i = step; i < width * step; i += step) {
277  bsrc[i] += A;
278  A = bsrc[i];
279  }
280  for (i = 0; i < width * step; i += step) {
281  bsrc[stride + i] += A;
282  A = bsrc[stride + i];
283  }
284  bsrc += stride2;
285  if (slice_height == 1)
286  continue;
287  // second line - first element has top prediction, the rest uses median
288  C = bsrc[-stride2];
289  bsrc[0] += C;
290  A = bsrc[0];
291  for (i = step; i < width * step; i += step) {
292  B = bsrc[i - stride2];
293  bsrc[i] += mid_pred(A, B, (uint8_t)(A + B - C));
294  C = B;
295  A = bsrc[i];
296  }
297  for (i = 0; i < width * step; i += step) {
298  B = bsrc[i - stride];
299  bsrc[stride + i] += mid_pred(A, B, (uint8_t)(A + B - C));
300  C = B;
301  A = bsrc[stride + i];
302  }
303  bsrc += stride2;
304  // the rest of lines use continuous median prediction
305  for (j = 2; j < slice_height; j++) {
306  for (i = 0; i < width * step; i += step) {
307  B = bsrc[i - stride2];
308  bsrc[i] += mid_pred(A, B, (uint8_t)(A + B - C));
309  C = B;
310  A = bsrc[i];
311  }
312  for (i = 0; i < width * step; i += step) {
313  B = bsrc[i - stride];
314  bsrc[i + stride] += mid_pred(A, B, (uint8_t)(A + B - C));
315  C = B;
316  A = bsrc[i + stride];
317  }
318  bsrc += stride2;
319  }
320  }
321 }
322 
323 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
324  AVPacket *avpkt)
325 {
326  const uint8_t *buf = avpkt->data;
327  int buf_size = avpkt->size;
328  UtvideoContext *c = avctx->priv_data;
329  int i, j;
330  const uint8_t *plane_start[5];
331  int plane_size, max_slice_size = 0, slice_start, slice_end, slice_size;
332  int ret;
333  GetByteContext gb;
334  ThreadFrame frame = { .f = data };
335 
336  if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) {
337  av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
338  return ret;
339  }
340 
341  ff_thread_finish_setup(avctx);
342 
343  /* parse plane structure to get frame flags and validate slice offsets */
344  bytestream2_init(&gb, buf, buf_size);
345  for (i = 0; i < c->planes; i++) {
346  plane_start[i] = gb.buffer;
347  if (bytestream2_get_bytes_left(&gb) < 256 + 4 * c->slices) {
348  av_log(avctx, AV_LOG_ERROR, "Insufficient data for a plane\n");
349  return AVERROR_INVALIDDATA;
350  }
351  bytestream2_skipu(&gb, 256);
352  slice_start = 0;
353  slice_end = 0;
354  for (j = 0; j < c->slices; j++) {
355  slice_end = bytestream2_get_le32u(&gb);
356  slice_size = slice_end - slice_start;
357  if (slice_end < 0 || slice_size < 0 ||
358  bytestream2_get_bytes_left(&gb) < slice_end) {
359  av_log(avctx, AV_LOG_ERROR, "Incorrect slice size\n");
360  return AVERROR_INVALIDDATA;
361  }
362  slice_start = slice_end;
363  max_slice_size = FFMAX(max_slice_size, slice_size);
364  }
365  plane_size = slice_end;
366  bytestream2_skipu(&gb, plane_size);
367  }
368  plane_start[c->planes] = gb.buffer;
370  av_log(avctx, AV_LOG_ERROR, "Not enough data for frame information\n");
371  return AVERROR_INVALIDDATA;
372  }
373  c->frame_info = bytestream2_get_le32u(&gb);
374  av_log(avctx, AV_LOG_DEBUG, "frame information flags %X\n", c->frame_info);
375 
376  c->frame_pred = (c->frame_info >> 8) & 3;
377 
378  if (c->frame_pred == PRED_GRADIENT) {
379  avpriv_request_sample(avctx, "Frame with gradient prediction");
380  return AVERROR_PATCHWELCOME;
381  }
382 
384  max_slice_size + FF_INPUT_BUFFER_PADDING_SIZE);
385 
386  if (!c->slice_bits) {
387  av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n");
388  return AVERROR(ENOMEM);
389  }
390 
391  switch (c->avctx->pix_fmt) {
392  case AV_PIX_FMT_RGB24:
393  case AV_PIX_FMT_RGBA:
394  for (i = 0; i < c->planes; i++) {
395  ret = decode_plane(c, i, frame.f->data[0] + ff_ut_rgb_order[i],
396  c->planes, frame.f->linesize[0], avctx->width,
397  avctx->height, plane_start[i],
398  c->frame_pred == PRED_LEFT);
399  if (ret)
400  return ret;
401  if (c->frame_pred == PRED_MEDIAN) {
402  if (!c->interlaced) {
403  restore_median(frame.f->data[0] + ff_ut_rgb_order[i],
404  c->planes, frame.f->linesize[0], avctx->width,
405  avctx->height, c->slices, 0);
406  } else {
407  restore_median_il(frame.f->data[0] + ff_ut_rgb_order[i],
408  c->planes, frame.f->linesize[0],
409  avctx->width, avctx->height, c->slices,
410  0);
411  }
412  }
413  }
414  restore_rgb_planes(frame.f->data[0], c->planes, frame.f->linesize[0],
415  avctx->width, avctx->height);
416  break;
417  case AV_PIX_FMT_YUV420P:
418  for (i = 0; i < 3; i++) {
419  ret = decode_plane(c, i, frame.f->data[i], 1, frame.f->linesize[i],
420  avctx->width >> !!i, avctx->height >> !!i,
421  plane_start[i], c->frame_pred == PRED_LEFT);
422  if (ret)
423  return ret;
424  if (c->frame_pred == PRED_MEDIAN) {
425  if (!c->interlaced) {
426  restore_median(frame.f->data[i], 1, frame.f->linesize[i],
427  avctx->width >> !!i, avctx->height >> !!i,
428  c->slices, !i);
429  } else {
430  restore_median_il(frame.f->data[i], 1, frame.f->linesize[i],
431  avctx->width >> !!i,
432  avctx->height >> !!i,
433  c->slices, !i);
434  }
435  }
436  }
437  break;
438  case AV_PIX_FMT_YUV422P:
439  for (i = 0; i < 3; i++) {
440  ret = decode_plane(c, i, frame.f->data[i], 1, frame.f->linesize[i],
441  avctx->width >> !!i, avctx->height,
442  plane_start[i], c->frame_pred == PRED_LEFT);
443  if (ret)
444  return ret;
445  if (c->frame_pred == PRED_MEDIAN) {
446  if (!c->interlaced) {
447  restore_median(frame.f->data[i], 1, frame.f->linesize[i],
448  avctx->width >> !!i, avctx->height,
449  c->slices, 0);
450  } else {
451  restore_median_il(frame.f->data[i], 1, frame.f->linesize[i],
452  avctx->width >> !!i, avctx->height,
453  c->slices, 0);
454  }
455  }
456  }
457  break;
458  }
459 
460  frame.f->key_frame = 1;
461  frame.f->pict_type = AV_PICTURE_TYPE_I;
462  frame.f->interlaced_frame = !!c->interlaced;
463 
464  *got_frame = 1;
465 
466  /* always report that the buffer was completely consumed */
467  return buf_size;
468 }
469 
471 {
472  UtvideoContext * const c = avctx->priv_data;
473 
474  c->avctx = avctx;
475 
476  ff_dsputil_init(&c->dsp, avctx);
477 
478  if (avctx->extradata_size < 16) {
479  av_log(avctx, AV_LOG_ERROR,
480  "Insufficient extradata size %d, should be at least 16\n",
481  avctx->extradata_size);
482  return AVERROR_INVALIDDATA;
483  }
484 
485  av_log(avctx, AV_LOG_DEBUG, "Encoder version %d.%d.%d.%d\n",
486  avctx->extradata[3], avctx->extradata[2],
487  avctx->extradata[1], avctx->extradata[0]);
488  av_log(avctx, AV_LOG_DEBUG, "Original format %X\n",
489  AV_RB32(avctx->extradata + 4));
490  c->frame_info_size = AV_RL32(avctx->extradata + 8);
491  c->flags = AV_RL32(avctx->extradata + 12);
492 
493  if (c->frame_info_size != 4)
494  avpriv_request_sample(avctx, "Frame info not 4 bytes");
495  av_log(avctx, AV_LOG_DEBUG, "Encoding parameters %08X\n", c->flags);
496  c->slices = (c->flags >> 24) + 1;
497  c->compression = c->flags & 1;
498  c->interlaced = c->flags & 0x800;
499 
500  c->slice_bits_size = 0;
501 
502  switch (avctx->codec_tag) {
503  case MKTAG('U', 'L', 'R', 'G'):
504  c->planes = 3;
505  avctx->pix_fmt = AV_PIX_FMT_RGB24;
506  break;
507  case MKTAG('U', 'L', 'R', 'A'):
508  c->planes = 4;
509  avctx->pix_fmt = AV_PIX_FMT_RGBA;
510  break;
511  case MKTAG('U', 'L', 'Y', '0'):
512  c->planes = 3;
513  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
514  avctx->colorspace = AVCOL_SPC_BT470BG;
515  break;
516  case MKTAG('U', 'L', 'Y', '2'):
517  c->planes = 3;
518  avctx->pix_fmt = AV_PIX_FMT_YUV422P;
519  avctx->colorspace = AVCOL_SPC_BT470BG;
520  break;
521  case MKTAG('U', 'L', 'H', '0'):
522  c->planes = 3;
523  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
524  avctx->colorspace = AVCOL_SPC_BT709;
525  break;
526  case MKTAG('U', 'L', 'H', '2'):
527  c->planes = 3;
528  avctx->pix_fmt = AV_PIX_FMT_YUV422P;
529  avctx->colorspace = AVCOL_SPC_BT709;
530  break;
531  default:
532  av_log(avctx, AV_LOG_ERROR, "Unknown Ut Video FOURCC provided (%08X)\n",
533  avctx->codec_tag);
534  return AVERROR_INVALIDDATA;
535  }
536 
537  return 0;
538 }
539 
541 {
542  UtvideoContext * const c = avctx->priv_data;
543 
544  av_freep(&c->slice_bits);
545 
546  return 0;
547 }
548 
550  .name = "utvideo",
551  .long_name = NULL_IF_CONFIG_SMALL("Ut Video"),
552  .type = AVMEDIA_TYPE_VIDEO,
553  .id = AV_CODEC_ID_UTVIDEO,
554  .priv_data_size = sizeof(UtvideoContext),
555  .init = decode_init,
556  .close = decode_end,
557  .decode = decode_frame,
558  .capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,
559 };
static void restore_median(uint8_t *src, int step, int stride, int width, int height, int slices, int rmode)
Definition: utvideodec.c:201
av_cold void ff_dsputil_init(DSPContext *c, AVCodecContext *avctx)
Definition: dsputil.c:2440
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
#define B
Definition: dsputil.c:1836
uint32_t flags
Definition: utvideo.h:70
#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
int slice_bits_size
Definition: utvideo.h:79
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:79
static av_cold int decode_end(AVCodecContext *avctx)
Definition: utvideodec.c:540
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1247
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:2755
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:74
static int decode(MimicContext *ctx, int quality, int num_coeffs, int is_iframe)
Definition: mimic.c:269
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:216
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:1162
uint32_t frame_info
Definition: utvideo.h:70
static void restore_median_il(uint8_t *src, int step, int stride, int width, int height, int slices, int rmode)
Definition: utvideodec.c:255
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:711
const char data[16]
Definition: mxf.c:66
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:292
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:37
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:470
void(* bswap_buf)(uint32_t *dst, const uint32_t *src, int w)
Definition: dsputil.h:202
#define AVERROR(e)
Definition: error.h:43
uint8_t sym
Definition: utvideo.h:83
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:142
AVCodecContext * avctx
Definition: utvideo.h:67
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:148
const char * name
Name of the codec implementation.
Definition: avcodec.h:2762
uint32_t frame_info_size
Definition: utvideo.h:70
#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
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:509
int compression
Definition: utvideo.h:73
DSPContext dsp
Definition: utvideo.h:68
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:168
#define FFMIN(a, b)
Definition: common.h:57
int width
picture width / height.
Definition: avcodec.h:1217
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:183
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: utvideodec.c:323
Common Ut Video header.
static int width
Definition: utils.c:156
int frame_pred
Definition: utvideo.h:75
uint8_t len
Definition: utvideo.h:84
also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
Definition: avcodec.h:581
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:125
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:1054
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:489
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1080
int extradata_size
Definition: avcodec.h:1163
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:1747
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:94
static int step
Definition: avplay.c:247
uint8_t * slice_bits
Definition: utvideo.h:78
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:113
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:368
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:782
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:498
DSP utils.
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:1973
void * priv_data
Definition: avcodec.h:1090
int len
VLC_TYPE(* table)[2]
code, bits
Definition: get_bits.h:66
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:163
also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601 ...
Definition: avcodec.h:584
#define MKTAG(a, b, c, d)
Definition: common.h:238
AVCodec ff_utvideo_decoder
Definition: utvideodec.c:549
This structure stores compressed data.
Definition: avcodec.h:950
void ff_free_vlc(VLC *vlc)
Definition: bitstream.c:333