FFmpeg  4.4.6
utvideoenc.c
Go to the documentation of this file.
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);
141  ff_llvidencdsp_init(&c->llvidencdsp);
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)
161  c->frame_pred = ut_pred_order[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 - 1U) << 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)
584  mangle_rgb_planes(c->slice_buffer, c->slice_stride, pic->data,
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);
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 };
#define A(x)
Definition: vp56_arith.h:28
#define av_cold
Definition: attributes.h:88
uint8_t
Libavcodec external API header.
#define FF_PRED_PLANE
Definition: avcodec.h:897
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
static av_always_inline void bytestream2_init_writer(PutByteContext *p, uint8_t *buf, int buf_size)
Definition: bytestream.h:147
static av_always_inline int bytestream2_tell_p(PutByteContext *p)
Definition: bytestream.h:197
static av_always_inline int bytestream2_seek_p(PutByteContext *p, int offset, int whence)
Definition: bytestream.h:236
static av_always_inline unsigned int bytestream2_put_buffer(PutByteContext *p, const uint8_t *src, unsigned int size)
Definition: bytestream.h:286
#define MKTAG(a, b, c, d)
Definition: common.h:478
#define NULL
Definition: coverity.c:32
long long int64_t
Definition: coverity.c:34
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
@ AV_OPT_TYPE_CONST
Definition: opt.h:234
@ AV_OPT_TYPE_INT
Definition: opt.h:225
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: codec.h:108
@ AV_CODEC_ID_UTVIDEO
Definition: codec_id.h:202
#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
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:50
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:410
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR(e)
Definition: error.h:43
#define AVERROR_OPTION_NOT_FOUND
Option not found.
Definition: error.h:61
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
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
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
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
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:274
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
int ff_huff_gen_len_table(uint8_t *dst, const uint64_t *stats, int stats_size, int skip0)
Definition: huffman.c:58
huffman tree builder and VLC generator
#define B
Definition: huffyuvdsp.h:32
misc image utilities
int i
Definition: input.c:407
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:218
av_cold void ff_bswapdsp_init(BswapDSPContext *c)
Definition: bswapdsp.c:49
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:83
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:309
static const struct @322 planes[]
av_cold void ff_llvidencdsp_init(LLVidEncDSPContext *c)
int stride
Definition: mace.c:144
#define FFALIGN(x, a)
Definition: macros.h:48
AVOptions.
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
@ AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
@ AV_PIX_FMT_GBRAP
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:215
@ AV_PIX_FMT_GBRP
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:168
@ AVCOL_SPC_BT709
also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
Definition: pixfmt.h:514
bitstream writer API
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
Definition: put_bits.h:57
static int put_bits_count(PutBitContext *s)
Definition: put_bits.h:76
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:110
const uint8_t * code
Definition: spdifenc.c:413
Describe the class of an AVClass context structure.
Definition: log.h:67
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
main external API structure.
Definition: avcodec.h:536
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:746
int width
picture width / height.
Definition: avcodec.h:709
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:561
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:1744
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:1768
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:1164
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:637
attribute_deprecated int prediction_method
Definition: avcodec.h:895
int extradata_size
Definition: avcodec.h:638
void * priv_data
Definition: avcodec.h:563
int slices
Number of slices.
Definition: avcodec.h:1187
AVCodec.
Definition: codec.h:197
const char * name
Name of the codec implementation.
Definition: codec.h:204
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:332
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:396
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:349
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:401
AVOption.
Definition: opt.h:248
This structure stores compressed data.
Definition: packet.h:346
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:375
int size
Definition: packet.h:370
uint8_t * data
Definition: packet.h:369
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
Definition: exr.c:93
uint8_t len
Definition: exr.c:94
uint32_t code
Definition: exr.c:96
uint16_t sym
Definition: exr.c:95
#define av_freep(p)
#define av_malloc(s)
#define av_log(a,...)
#define src
Definition: vp8dsp.c:255
AVPacket * pkt
Definition: movenc.c:59
#define height
#define width
Common Ut Video header.
@ PRED_MEDIAN
Definition: utvideo.h:41
@ PRED_GRADIENT
Definition: utvideo.h:40
@ PRED_NONE
Definition: utvideo.h:38
@ PRED_LEFT
Definition: utvideo.h:39
@ COMP_HUFF
Definition: utvideo.h:46
@ UTVIDEO_420
Definition: utvideo.h:59
@ UTVIDEO_RGB
Definition: utvideo.h:57
@ UTVIDEO_RGBA
Definition: utvideo.h:58
@ UTVIDEO_444
Definition: utvideo.h:61
@ UTVIDEO_422
Definition: utvideo.h:60
AVCodec ff_utvideo_encoder
Definition: utvideoenc.c:689
static void calculate_codes(HuffEntry *he)
Definition: utvideoenc.c:357
static const AVOption options[]
Definition: utvideoenc.c:672
#define VE
Definition: utvideoenc.c:671
static int huff_cmp_sym(const void *a, const void *b)
Definition: utvideoenc.c:60
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
static void count_usage(uint8_t *src, int width, int height, uint64_t *counts)
Definition: utvideoenc.c:343
static int utvideo_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pic, int *got_packet)
Definition: utvideoenc.c:551
static const AVClass utvideo_class
Definition: utvideoenc.c:682
static void median_predict(UtvideoContext *c, uint8_t *src, uint8_t *dst, ptrdiff_t stride, int width, int height)
Definition: utvideoenc.c:309
static av_cold int utvideo_encode_close(AVCodecContext *avctx)
Definition: utvideoenc.c:66
static const int ut_pred_order[5]
Definition: utvideoenc.c:47
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 int ut_huff_cmp_len(const void *a, const void *b)
Definition: utvideoenc.c:53
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
#define OFFSET(x)
Definition: utvideoenc.c:670
static av_cold int utvideo_encode_init(AVCodecContext *avctx)
Definition: utvideoenc.c:78
const char * b
Definition: vf_curves.c:118
const char * g
Definition: vf_curves.c:117
static const uint8_t offset[127][2]
Definition: vf_spp.c:107
int len
static double c[64]