FFmpeg
utvideoenc.c
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1 /*
2  * Ut Video encoder
3  * Copyright (c) 2012 Jan Ekström
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg 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  * FFmpeg 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 FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * Ut Video encoder
25  */
26 
27 #include "libavutil/imgutils.h"
28 #include "libavutil/intreadwrite.h"
29 #include "libavutil/opt.h"
30 
31 #include "avcodec.h"
32 #include "internal.h"
33 #include "bswapdsp.h"
34 #include "bytestream.h"
35 #include "put_bits.h"
36 #include "mathops.h"
37 #include "utvideo.h"
38 #include "huffman.h"
39 
40 typedef struct HuffEntry {
41  uint16_t sym;
42  uint8_t len;
43  uint32_t code;
44 } HuffEntry;
45 
46 #if FF_API_PRIVATE_OPT
47 static const int ut_pred_order[5] = {
49 };
50 #endif
51 
52 /* Compare huffman tree nodes */
53 static int ut_huff_cmp_len(const void *a, const void *b)
54 {
55  const HuffEntry *aa = a, *bb = b;
56  return (aa->len - bb->len)*256 + aa->sym - bb->sym;
57 }
58 
59 /* Compare huffentry symbols */
60 static int huff_cmp_sym(const void *a, const void *b)
61 {
62  const HuffEntry *aa = a, *bb = b;
63  return aa->sym - bb->sym;
64 }
65 
67 {
68  UtvideoContext *c = avctx->priv_data;
69  int i;
70 
71  av_freep(&c->slice_bits);
72  for (i = 0; i < 4; i++)
73  av_freep(&c->slice_buffer[i]);
74 
75  return 0;
76 }
77 
79 {
80  UtvideoContext *c = avctx->priv_data;
81  int i, subsampled_height;
82  uint32_t original_format;
83 
84  c->avctx = avctx;
85  c->frame_info_size = 4;
86  c->slice_stride = FFALIGN(avctx->width, 32);
87 
88  switch (avctx->pix_fmt) {
89  case AV_PIX_FMT_GBRP:
90  c->planes = 3;
91  avctx->codec_tag = MKTAG('U', 'L', 'R', 'G');
92  original_format = UTVIDEO_RGB;
93  break;
94  case AV_PIX_FMT_GBRAP:
95  c->planes = 4;
96  avctx->codec_tag = MKTAG('U', 'L', 'R', 'A');
97  original_format = UTVIDEO_RGBA;
98  avctx->bits_per_coded_sample = 32;
99  break;
100  case AV_PIX_FMT_YUV420P:
101  if (avctx->width & 1 || avctx->height & 1) {
102  av_log(avctx, AV_LOG_ERROR,
103  "4:2:0 video requires even width and height.\n");
104  return AVERROR_INVALIDDATA;
105  }
106  c->planes = 3;
107  if (avctx->colorspace == AVCOL_SPC_BT709)
108  avctx->codec_tag = MKTAG('U', 'L', 'H', '0');
109  else
110  avctx->codec_tag = MKTAG('U', 'L', 'Y', '0');
111  original_format = UTVIDEO_420;
112  break;
113  case AV_PIX_FMT_YUV422P:
114  if (avctx->width & 1) {
115  av_log(avctx, AV_LOG_ERROR,
116  "4:2:2 video requires even width.\n");
117  return AVERROR_INVALIDDATA;
118  }
119  c->planes = 3;
120  if (avctx->colorspace == AVCOL_SPC_BT709)
121  avctx->codec_tag = MKTAG('U', 'L', 'H', '2');
122  else
123  avctx->codec_tag = MKTAG('U', 'L', 'Y', '2');
124  original_format = UTVIDEO_422;
125  break;
126  case AV_PIX_FMT_YUV444P:
127  c->planes = 3;
128  if (avctx->colorspace == AVCOL_SPC_BT709)
129  avctx->codec_tag = MKTAG('U', 'L', 'H', '4');
130  else
131  avctx->codec_tag = MKTAG('U', 'L', 'Y', '4');
132  original_format = UTVIDEO_444;
133  break;
134  default:
135  av_log(avctx, AV_LOG_ERROR, "Unknown pixel format: %d\n",
136  avctx->pix_fmt);
137  return AVERROR_INVALIDDATA;
138  }
139 
140  ff_bswapdsp_init(&c->bdsp);
142 
143 #if FF_API_PRIVATE_OPT
145  /* Check the prediction method, and error out if unsupported */
146  if (avctx->prediction_method < 0 || avctx->prediction_method > 4) {
147  av_log(avctx, AV_LOG_WARNING,
148  "Prediction method %d is not supported in Ut Video.\n",
149  avctx->prediction_method);
151  }
152 
153  if (avctx->prediction_method == FF_PRED_PLANE) {
154  av_log(avctx, AV_LOG_ERROR,
155  "Plane prediction is not supported in Ut Video.\n");
157  }
158 
159  /* Convert from libavcodec prediction type to Ut Video's */
160  if (avctx->prediction_method)
163 #endif
164 
165  if (c->frame_pred == PRED_GRADIENT) {
166  av_log(avctx, AV_LOG_ERROR, "Gradient prediction is not supported.\n");
168  }
169 
170  /*
171  * Check the asked slice count for obviously invalid
172  * values (> 256 or negative).
173  */
174  if (avctx->slices > 256 || avctx->slices < 0) {
175  av_log(avctx, AV_LOG_ERROR,
176  "Slice count %d is not supported in Ut Video (theoretical range is 0-256).\n",
177  avctx->slices);
178  return AVERROR(EINVAL);
179  }
180 
181  /* Check that the slice count is not larger than the subsampled height */
182  subsampled_height = avctx->height >> av_pix_fmt_desc_get(avctx->pix_fmt)->log2_chroma_h;
183  if (avctx->slices > subsampled_height) {
184  av_log(avctx, AV_LOG_ERROR,
185  "Slice count %d is larger than the subsampling-applied height %d.\n",
186  avctx->slices, subsampled_height);
187  return AVERROR(EINVAL);
188  }
189 
190  /* extradata size is 4 * 32 bits */
191  avctx->extradata_size = 16;
192 
193  avctx->extradata = av_mallocz(avctx->extradata_size +
195 
196  if (!avctx->extradata) {
197  av_log(avctx, AV_LOG_ERROR, "Could not allocate extradata.\n");
198  utvideo_encode_close(avctx);
199  return AVERROR(ENOMEM);
200  }
201 
202  for (i = 0; i < c->planes; i++) {
203  c->slice_buffer[i] = av_malloc(c->slice_stride * (avctx->height + 2) +
205  if (!c->slice_buffer[i]) {
206  av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer 1.\n");
207  utvideo_encode_close(avctx);
208  return AVERROR(ENOMEM);
209  }
210  }
211 
212  /*
213  * Set the version of the encoder.
214  * Last byte is "implementation ID", which is
215  * obtained from the creator of the format.
216  * Libavcodec has been assigned with the ID 0xF0.
217  */
218  AV_WB32(avctx->extradata, MKTAG(1, 0, 0, 0xF0));
219 
220  /*
221  * Set the "original format"
222  * Not used for anything during decoding.
223  */
224  AV_WL32(avctx->extradata + 4, original_format);
225 
226  /* Write 4 as the 'frame info size' */
227  AV_WL32(avctx->extradata + 8, c->frame_info_size);
228 
229  /*
230  * Set how many slices are going to be used.
231  * By default uses multiple slices depending on the subsampled height.
232  * This enables multithreading in the official decoder.
233  */
234  if (!avctx->slices) {
235  c->slices = subsampled_height / 120;
236 
237  if (!c->slices)
238  c->slices = 1;
239  else if (c->slices > 256)
240  c->slices = 256;
241  } else {
242  c->slices = avctx->slices;
243  }
244 
245  /* Set compression mode */
246  c->compression = COMP_HUFF;
247 
248  /*
249  * Set the encoding flags:
250  * - Slice count minus 1
251  * - Interlaced encoding mode flag, set to zero for now.
252  * - Compression mode (none/huff)
253  * And write the flags.
254  */
255  c->flags = (c->slices - 1) << 24;
256  c->flags |= 0 << 11; // bit field to signal interlaced encoding mode
257  c->flags |= c->compression;
258 
259  AV_WL32(avctx->extradata + 12, c->flags);
260 
261  return 0;
262 }
263 
264 static void mangle_rgb_planes(uint8_t *dst[4], ptrdiff_t dst_stride,
265  uint8_t *const src[4], int planes, const int stride[4],
266  int width, int height)
267 {
268  int i, j;
269  int k = 2 * dst_stride;
270  const uint8_t *sg = src[0];
271  const uint8_t *sb = src[1];
272  const uint8_t *sr = src[2];
273  const uint8_t *sa = src[3];
274  unsigned int g;
275 
276  for (j = 0; j < height; j++) {
277  if (planes == 3) {
278  for (i = 0; i < width; i++) {
279  g = sg[i];
280  dst[0][k] = g;
281  g += 0x80;
282  dst[1][k] = sb[i] - g;
283  dst[2][k] = sr[i] - g;
284  k++;
285  }
286  } else {
287  for (i = 0; i < width; i++) {
288  g = sg[i];
289  dst[0][k] = g;
290  g += 0x80;
291  dst[1][k] = sb[i] - g;
292  dst[2][k] = sr[i] - g;
293  dst[3][k] = sa[i];
294  k++;
295  }
296  sa += stride[3];
297  }
298  k += dst_stride - width;
299  sg += stride[0];
300  sb += stride[1];
301  sr += stride[2];
302  }
303 }
304 
305 #undef A
306 #undef B
307 
308 /* Write data to a plane with median prediction */
310  ptrdiff_t stride, int width, int height)
311 {
312  int i, j;
313  int A, B;
314  uint8_t prev;
315 
316  /* First line uses left neighbour prediction */
317  prev = 0x80; /* Set the initial value */
318  for (i = 0; i < width; i++) {
319  *dst++ = src[i] - prev;
320  prev = src[i];
321  }
322 
323  if (height == 1)
324  return;
325 
326  src += stride;
327 
328  /*
329  * Second line uses top prediction for the first sample,
330  * and median for the rest.
331  */
332  A = B = 0;
333 
334  /* Rest of the coded part uses median prediction */
335  for (j = 1; j < height; j++) {
336  c->llvidencdsp.sub_median_pred(dst, src - stride, src, width, &A, &B);
337  dst += width;
338  src += stride;
339  }
340 }
341 
342 /* Count the usage of values in a plane */
343 static void count_usage(uint8_t *src, int width,
344  int height, uint64_t *counts)
345 {
346  int i, j;
347 
348  for (j = 0; j < height; j++) {
349  for (i = 0; i < width; i++) {
350  counts[src[i]]++;
351  }
352  src += width;
353  }
354 }
355 
356 /* Calculate the actual huffman codes from the code lengths */
357 static void calculate_codes(HuffEntry *he)
358 {
359  int last, i;
360  uint32_t code;
361 
362  qsort(he, 256, sizeof(*he), ut_huff_cmp_len);
363 
364  last = 255;
365  while (he[last].len == 255 && last)
366  last--;
367 
368  code = 0;
369  for (i = last; i >= 0; i--) {
370  he[i].code = code >> (32 - he[i].len);
371  code += 0x80000000u >> (he[i].len - 1);
372  }
373 
374  qsort(he, 256, sizeof(*he), huff_cmp_sym);
375 }
376 
377 /* Write huffman bit codes to a memory block */
378 static int write_huff_codes(uint8_t *src, uint8_t *dst, int dst_size,
379  int width, int height, HuffEntry *he)
380 {
381  PutBitContext pb;
382  int i, j;
383  int count;
384 
385  init_put_bits(&pb, dst, dst_size);
386 
387  /* Write the codes */
388  for (j = 0; j < height; j++) {
389  for (i = 0; i < width; i++)
390  put_bits(&pb, he[src[i]].len, he[src[i]].code);
391 
392  src += width;
393  }
394 
395  /* Pad output to a 32-bit boundary */
396  count = put_bits_count(&pb) & 0x1F;
397 
398  if (count)
399  put_bits(&pb, 32 - count, 0);
400 
401  /* Get the amount of bits written */
402  count = put_bits_count(&pb);
403 
404  /* Flush the rest with zeroes */
405  flush_put_bits(&pb);
406 
407  return count;
408 }
409 
411  uint8_t *dst, ptrdiff_t stride, int plane_no,
412  int width, int height, PutByteContext *pb)
413 {
414  UtvideoContext *c = avctx->priv_data;
415  uint8_t lengths[256];
416  uint64_t counts[256] = { 0 };
417 
418  HuffEntry he[256];
419 
420  uint32_t offset = 0, slice_len = 0;
421  const int cmask = ~(!plane_no && avctx->pix_fmt == AV_PIX_FMT_YUV420P);
422  int i, sstart, send = 0;
423  int symbol;
424  int ret;
425 
426  /* Do prediction / make planes */
427  switch (c->frame_pred) {
428  case PRED_NONE:
429  for (i = 0; i < c->slices; i++) {
430  sstart = send;
431  send = height * (i + 1) / c->slices & cmask;
432  av_image_copy_plane(dst + sstart * width, width,
433  src + sstart * stride, stride,
434  width, send - sstart);
435  }
436  break;
437  case PRED_LEFT:
438  for (i = 0; i < c->slices; i++) {
439  sstart = send;
440  send = height * (i + 1) / c->slices & cmask;
441  c->llvidencdsp.sub_left_predict(dst + sstart * width, src + sstart * stride, stride, width, send - sstart);
442  }
443  break;
444  case PRED_MEDIAN:
445  for (i = 0; i < c->slices; i++) {
446  sstart = send;
447  send = height * (i + 1) / c->slices & cmask;
448  median_predict(c, src + sstart * stride, dst + sstart * width,
449  stride, width, send - sstart);
450  }
451  break;
452  default:
453  av_log(avctx, AV_LOG_ERROR, "Unknown prediction mode: %d\n",
454  c->frame_pred);
456  }
457 
458  /* Count the usage of values */
459  count_usage(dst, width, height, counts);
460 
461  /* Check for a special case where only one symbol was used */
462  for (symbol = 0; symbol < 256; symbol++) {
463  /* If non-zero count is found, see if it matches width * height */
464  if (counts[symbol]) {
465  /* Special case if only one symbol was used */
466  if (counts[symbol] == width * (int64_t)height) {
467  /*
468  * Write a zero for the single symbol
469  * used in the plane, else 0xFF.
470  */
471  for (i = 0; i < 256; i++) {
472  if (i == symbol)
473  bytestream2_put_byte(pb, 0);
474  else
475  bytestream2_put_byte(pb, 0xFF);
476  }
477 
478  /* Write zeroes for lengths */
479  for (i = 0; i < c->slices; i++)
480  bytestream2_put_le32(pb, 0);
481 
482  /* And that's all for that plane folks */
483  return 0;
484  }
485  break;
486  }
487  }
488 
489  /* Calculate huffman lengths */
490  if ((ret = ff_huff_gen_len_table(lengths, counts, 256, 1)) < 0)
491  return ret;
492 
493  /*
494  * Write the plane's header into the output packet:
495  * - huffman code lengths (256 bytes)
496  * - slice end offsets (gotten from the slice lengths)
497  */
498  for (i = 0; i < 256; i++) {
499  bytestream2_put_byte(pb, lengths[i]);
500 
501  he[i].len = lengths[i];
502  he[i].sym = i;
503  }
504 
505  /* Calculate the huffman codes themselves */
506  calculate_codes(he);
507 
508  send = 0;
509  for (i = 0; i < c->slices; i++) {
510  sstart = send;
511  send = height * (i + 1) / c->slices & cmask;
512 
513  /*
514  * Write the huffman codes to a buffer,
515  * get the offset in bits and convert to bytes.
516  */
517  offset += write_huff_codes(dst + sstart * width, c->slice_bits,
518  width * height + 4, width,
519  send - sstart, he) >> 3;
520 
521  slice_len = offset - slice_len;
522 
523  /* Byteswap the written huffman codes */
524  c->bdsp.bswap_buf((uint32_t *) c->slice_bits,
525  (uint32_t *) c->slice_bits,
526  slice_len >> 2);
527 
528  /* Write the offset to the stream */
529  bytestream2_put_le32(pb, offset);
530 
531  /* Seek to the data part of the packet */
532  bytestream2_seek_p(pb, 4 * (c->slices - i - 1) +
533  offset - slice_len, SEEK_CUR);
534 
535  /* Write the slices' data into the output packet */
536  bytestream2_put_buffer(pb, c->slice_bits, slice_len);
537 
538  /* Seek back to the slice offsets */
539  bytestream2_seek_p(pb, -4 * (c->slices - i - 1) - offset,
540  SEEK_CUR);
541 
542  slice_len = offset;
543  }
544 
545  /* And at the end seek to the end of written slice(s) */
546  bytestream2_seek_p(pb, offset, SEEK_CUR);
547 
548  return 0;
549 }
550 
552  const AVFrame *pic, int *got_packet)
553 {
554  UtvideoContext *c = avctx->priv_data;
555  PutByteContext pb;
556 
557  uint32_t frame_info;
558 
559  uint8_t *dst;
560 
561  int width = avctx->width, height = avctx->height;
562  int i, ret = 0;
563 
564  /* Allocate a new packet if needed, and set it to the pointer dst */
565  ret = ff_alloc_packet2(avctx, pkt, (256 + 4 * c->slices + width * height) *
566  c->planes + 4, 0);
567 
568  if (ret < 0)
569  return ret;
570 
571  dst = pkt->data;
572 
573  bytestream2_init_writer(&pb, dst, pkt->size);
574 
575  av_fast_padded_malloc(&c->slice_bits, &c->slice_bits_size, width * height + 4);
576 
577  if (!c->slice_bits) {
578  av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer 2.\n");
579  return AVERROR(ENOMEM);
580  }
581 
582  /* In case of RGB, mangle the planes to Ut Video's format */
583  if (avctx->pix_fmt == AV_PIX_FMT_GBRAP || avctx->pix_fmt == AV_PIX_FMT_GBRP)
585  c->planes, pic->linesize, width, height);
586 
587  /* Deal with the planes */
588  switch (avctx->pix_fmt) {
589  case AV_PIX_FMT_GBRP:
590  case AV_PIX_FMT_GBRAP:
591  for (i = 0; i < c->planes; i++) {
592  ret = encode_plane(avctx, c->slice_buffer[i] + 2 * c->slice_stride,
593  c->slice_buffer[i], c->slice_stride, i,
594  width, height, &pb);
595 
596  if (ret) {
597  av_log(avctx, AV_LOG_ERROR, "Error encoding plane %d.\n", i);
598  return ret;
599  }
600  }
601  break;
602  case AV_PIX_FMT_YUV444P:
603  for (i = 0; i < c->planes; i++) {
604  ret = encode_plane(avctx, pic->data[i], c->slice_buffer[0],
605  pic->linesize[i], i, width, height, &pb);
606 
607  if (ret) {
608  av_log(avctx, AV_LOG_ERROR, "Error encoding plane %d.\n", i);
609  return ret;
610  }
611  }
612  break;
613  case AV_PIX_FMT_YUV422P:
614  for (i = 0; i < c->planes; i++) {
615  ret = encode_plane(avctx, pic->data[i], c->slice_buffer[0],
616  pic->linesize[i], i, width >> !!i, height, &pb);
617 
618  if (ret) {
619  av_log(avctx, AV_LOG_ERROR, "Error encoding plane %d.\n", i);
620  return ret;
621  }
622  }
623  break;
624  case AV_PIX_FMT_YUV420P:
625  for (i = 0; i < c->planes; i++) {
626  ret = encode_plane(avctx, pic->data[i], c->slice_buffer[0],
627  pic->linesize[i], i, width >> !!i, height >> !!i,
628  &pb);
629 
630  if (ret) {
631  av_log(avctx, AV_LOG_ERROR, "Error encoding plane %d.\n", i);
632  return ret;
633  }
634  }
635  break;
636  default:
637  av_log(avctx, AV_LOG_ERROR, "Unknown pixel format: %d\n",
638  avctx->pix_fmt);
639  return AVERROR_INVALIDDATA;
640  }
641 
642  /*
643  * Write frame information (LE 32-bit unsigned)
644  * into the output packet.
645  * Contains the prediction method.
646  */
647  frame_info = c->frame_pred << 8;
648  bytestream2_put_le32(&pb, frame_info);
649 
650  /*
651  * At least currently Ut Video is IDR only.
652  * Set flags accordingly.
653  */
654 #if FF_API_CODED_FRAME
656  avctx->coded_frame->key_frame = 1;
659 #endif
660 
661  pkt->size = bytestream2_tell_p(&pb);
662  pkt->flags |= AV_PKT_FLAG_KEY;
663 
664  /* Packet should be done */
665  *got_packet = 1;
666 
667  return 0;
668 }
669 
670 #define OFFSET(x) offsetof(UtvideoContext, x)
671 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
672 static const AVOption options[] = {
673 { "pred", "Prediction method", OFFSET(frame_pred), AV_OPT_TYPE_INT, { .i64 = PRED_LEFT }, PRED_NONE, PRED_MEDIAN, VE, "pred" },
674  { "none", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = PRED_NONE }, INT_MIN, INT_MAX, VE, "pred" },
675  { "left", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = PRED_LEFT }, INT_MIN, INT_MAX, VE, "pred" },
676  { "gradient", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = PRED_GRADIENT }, INT_MIN, INT_MAX, VE, "pred" },
677  { "median", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = PRED_MEDIAN }, INT_MIN, INT_MAX, VE, "pred" },
678 
679  { NULL},
680 };
681 
682 static const AVClass utvideo_class = {
683  .class_name = "utvideo",
684  .item_name = av_default_item_name,
685  .option = options,
686  .version = LIBAVUTIL_VERSION_INT,
687 };
688 
690  .name = "utvideo",
691  .long_name = NULL_IF_CONFIG_SMALL("Ut Video"),
692  .type = AVMEDIA_TYPE_VIDEO,
693  .id = AV_CODEC_ID_UTVIDEO,
694  .priv_data_size = sizeof(UtvideoContext),
695  .priv_class = &utvideo_class,
697  .encode2 = utvideo_encode_frame,
698  .close = utvideo_encode_close,
699  .capabilities = AV_CODEC_CAP_FRAME_THREADS,
700  .pix_fmts = (const enum AVPixelFormat[]) {
703  },
704 };
also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
Definition: pixfmt.h:514
#define NULL
Definition: coverity.c:32
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static int ut_huff_cmp_len(const void *a, const void *b)
Definition: utvideoenc.c:53
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
This structure describes decoded (raw) audio or video data.
Definition: frame.h:314
static int encode_plane(AVCodecContext *avctx, uint8_t *src, uint8_t *dst, ptrdiff_t stride, int plane_no, int width, int height, PutByteContext *pb)
Definition: utvideoenc.c:410
AVOption.
Definition: opt.h:248
uint32_t flags
Definition: utvideo.h:72
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
misc image utilities
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:218
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
static int huff_cmp_sym(const void *a, const void *b)
Definition: utvideoenc.c:60
const char * g
Definition: vf_curves.c:115
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int slice_bits_size
Definition: utvideo.h:83
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:168
int size
Definition: packet.h:364
static av_always_inline void bytestream2_init_writer(PutByteContext *p, uint8_t *buf, int buf_size)
Definition: bytestream.h:147
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
LLVidEncDSPContext llvidencdsp
Definition: utvideo.h:70
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:36
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:741
static av_cold int utvideo_encode_init(AVCodecContext *avctx)
Definition: utvideoenc.c:78
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional AV_INPUT_BUFFER_PADDING_SIZE at the end w...
Definition: utils.c:72
static void median_predict(UtvideoContext *c, uint8_t *src, uint8_t *dst, ptrdiff_t stride, int width, int height)
Definition: utvideoenc.c:309
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
static AVPacket pkt
AVCodec.
Definition: codec.h:190
av_cold void ff_llvidencdsp_init(LLVidEncDSPContext *c)
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size)
Check AVPacket size and/or allocate data.
Definition: encode.c:33
uint8_t
#define av_cold
Definition: attributes.h:88
#define av_malloc(s)
AVOptions.
void(* bswap_buf)(uint32_t *dst, const uint32_t *src, int w)
Definition: bswapdsp.h:25
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
AVCodec ff_utvideo_encoder
Definition: utvideoenc.c:689
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:632
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:262
#define height
uint8_t * data
Definition: packet.h:363
static int utvideo_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pic, int *got_packet)
Definition: utvideoenc.c:551
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:1755
uint16_t code
Definition: magicyuv.c:50
#define A(x)
Definition: vp56_arith.h:28
#define FFALIGN(x, a)
Definition: macros.h:48
#define av_log(a,...)
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:401
#define src
Definition: vp8dsp.c:254
BswapDSPContext bdsp
Definition: utvideo.h:68
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
void(* sub_median_pred)(uint8_t *dst, const uint8_t *src1, const uint8_t *src2, intptr_t w, int *left, int *left_top)
Subtract HuffYUV&#39;s variant of median prediction.
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
#define B
Definition: huffyuvdsp.h:32
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:153
AVCodecContext * avctx
Definition: utvideo.h:66
const char * name
Name of the codec implementation.
Definition: codec.h:197
uint32_t frame_info_size
Definition: utvideo.h:72
GLsizei count
Definition: opengl_enc.c:108
static int write_huff_codes(uint8_t *src, uint8_t *dst, int dst_size, int width, int height, HuffEntry *he)
Definition: utvideoenc.c:378
static av_always_inline int bytestream2_tell_p(PutByteContext *p)
Definition: bytestream.h:197
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: codec.h:106
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:369
static int put_bits_count(PutBitContext *s)
Definition: put_bits.h:83
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
int compression
Definition: utvideo.h:75
static const AVOption options[]
Definition: utvideoenc.c:672
#define b
Definition: input.c:41
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:397
#define width
int width
picture width / height.
Definition: avcodec.h:704
static const AVClass utvideo_class
Definition: utvideoenc.c:682
static av_always_inline unsigned int bytestream2_put_buffer(PutByteContext *p, const uint8_t *src, unsigned int size)
Definition: bytestream.h:286
ptrdiff_t slice_stride
Definition: utvideo.h:81
static av_always_inline int bytestream2_seek_p(PutByteContext *p, int offset, int whence)
Definition: bytestream.h:236
#define OFFSET(x)
Definition: utvideoenc.c:670
Common Ut Video header.
int frame_pred
Definition: utvideo.h:77
uint8_t len
Definition: magicyuv.c:49
int ff_huff_gen_len_table(uint8_t *dst, const uint64_t *stats, int stats_size, int skip0)
Definition: huffman.c:58
Libavcodec external API header.
attribute_deprecated int prediction_method
Definition: avcodec.h:890
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:345
main external API structure.
Definition: avcodec.h:531
static const struct @324 planes[]
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> (&#39;D&#39;<<24) + (&#39;C&#39;<<16) + (&#39;B&#39;<<8) + &#39;A&#39;).
Definition: avcodec.h:556
int extradata_size
Definition: avcodec.h:633
Describe the class of an AVClass context structure.
Definition: log.h:67
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:1159
huffman tree builder and VLC generator
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:300
uint8_t * slice_bits
Definition: utvideo.h:82
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:328
static void mangle_rgb_planes(uint8_t *dst[4], ptrdiff_t dst_stride, uint8_t *const src[4], int planes, const int stride[4], int width, int height)
Definition: utvideoenc.c:264
static void calculate_codes(HuffEntry *he)
Definition: utvideoenc.c:357
static void count_usage(uint8_t *src, int width, int height, uint64_t *counts)
Definition: utvideoenc.c:343
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:104
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
common internal api header.
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:117
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:215
uint16_t sym
Definition: utvideoenc.c:41
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:1781
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
Definition: put_bits.h:64
#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
int slices
Number of slices.
Definition: avcodec.h:1182
av_cold void ff_bswapdsp_init(BswapDSPContext *c)
Definition: bswapdsp.c:49
void * priv_data
Definition: avcodec.h:558
uint8_t * slice_buffer[4]
Definition: utvideo.h:82
#define AVERROR_OPTION_NOT_FOUND
Option not found.
Definition: error.h:61
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:85
#define FF_PRED_PLANE
Definition: avcodec.h:892
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:392
#define av_freep(p)
#define VE
Definition: utvideoenc.c:671
void av_image_copy_plane(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int bytewidth, int height)
Copy image plane from src to dst.
Definition: imgutils.c:373
#define stride
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
#define MKTAG(a, b, c, d)
Definition: common.h:405
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
static av_cold int utvideo_encode_close(AVCodecContext *avctx)
Definition: utvideoenc.c:66
This structure stores compressed data.
Definition: packet.h:340
void(* sub_left_predict)(uint8_t *dst, uint8_t *src, ptrdiff_t stride, ptrdiff_t width, int height)
int i
Definition: input.c:407
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
static const int ut_pred_order[5]
Definition: utvideoenc.c:47
bitstream writer API