FFmpeg  4.4
mjpegenc.c
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1 /*
2  * MJPEG encoder
3  * Copyright (c) 2000, 2001 Fabrice Bellard
4  * Copyright (c) 2003 Alex Beregszaszi
5  * Copyright (c) 2003-2004 Michael Niedermayer
6  *
7  * Support for external huffman table, various fixes (AVID workaround),
8  * aspecting, new decode_frame mechanism and apple mjpeg-b support
9  * by Alex Beregszaszi
10  *
11  * This file is part of FFmpeg.
12  *
13  * FFmpeg is free software; you can redistribute it and/or
14  * modify it under the terms of the GNU Lesser General Public
15  * License as published by the Free Software Foundation; either
16  * version 2.1 of the License, or (at your option) any later version.
17  *
18  * FFmpeg is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21  * Lesser General Public License for more details.
22  *
23  * You should have received a copy of the GNU Lesser General Public
24  * License along with FFmpeg; if not, write to the Free Software
25  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26  */
27 
28 /**
29  * @file
30  * MJPEG encoder.
31  */
32 
33 #include "libavutil/pixdesc.h"
34 
35 #include "avcodec.h"
36 #include "jpegtables.h"
37 #include "mjpegenc_common.h"
38 #include "mjpegenc_huffman.h"
39 #include "mpegvideo.h"
40 #include "mjpeg.h"
41 #include "mjpegenc.h"
42 #include "profiles.h"
43 
44 static av_cold void init_uni_ac_vlc(const uint8_t huff_size_ac[256],
45  uint8_t *uni_ac_vlc_len)
46 {
47  for (int i = 0; i < 128; i++) {
48  int level = i - 64;
49  if (!level)
50  continue;
51  for (int run = 0; run < 64; run++) {
52  int len, code, nbits;
53  int alevel = FFABS(level);
54 
55  len = (run >> 4) * huff_size_ac[0xf0];
56 
57  nbits= av_log2_16bit(alevel) + 1;
58  code = ((15&run) << 4) | nbits;
59 
60  len += huff_size_ac[code] + nbits;
61 
62  uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
63  // We ignore EOB as its just a constant which does not change generally
64  }
65  }
66 }
67 
68 /**
69  * Encodes and outputs the entire frame in the JPEG format.
70  *
71  * @param s The MpegEncContext.
72  */
74 {
75  int nbits, code, table_id;
76  MJpegContext *m = s->mjpeg_ctx;
77  uint8_t *huff_size[4] = { m->huff_size_dc_luminance,
81  uint16_t *huff_code[4] = { m->huff_code_dc_luminance,
85  size_t total_bits = 0;
86  size_t bytes_needed;
87 
88  s->header_bits = get_bits_diff(s);
89  // Estimate the total size first
90  for (int i = 0; i < m->huff_ncode; i++) {
91  table_id = m->huff_buffer[i].table_id;
92  code = m->huff_buffer[i].code;
93  nbits = code & 0xf;
94 
95  total_bits += huff_size[table_id][code] + nbits;
96  }
97 
98  bytes_needed = (total_bits + 7) / 8;
99  ff_mpv_reallocate_putbitbuffer(s, bytes_needed, bytes_needed);
100 
101  for (int i = 0; i < m->huff_ncode; i++) {
102  table_id = m->huff_buffer[i].table_id;
103  code = m->huff_buffer[i].code;
104  nbits = code & 0xf;
105 
106  put_bits(&s->pb, huff_size[table_id][code], huff_code[table_id][code]);
107  if (nbits != 0) {
108  put_sbits(&s->pb, nbits, m->huff_buffer[i].mant);
109  }
110  }
111 
112  m->huff_ncode = 0;
113  s->i_tex_bits = get_bits_diff(s);
114 }
115 
116 /**
117  * Builds all 4 optimal Huffman tables.
118  *
119  * Uses the data stored in the JPEG buffer to compute the tables.
120  * Stores the Huffman tables in the bits_* and val_* arrays in the MJpegContext.
121  *
122  * @param m MJpegContext containing the JPEG buffer.
123  */
125 {
126  MJpegEncHuffmanContext dc_luminance_ctx;
127  MJpegEncHuffmanContext dc_chrominance_ctx;
128  MJpegEncHuffmanContext ac_luminance_ctx;
129  MJpegEncHuffmanContext ac_chrominance_ctx;
130  MJpegEncHuffmanContext *ctx[4] = { &dc_luminance_ctx,
131  &dc_chrominance_ctx,
132  &ac_luminance_ctx,
133  &ac_chrominance_ctx };
134  for (int i = 0; i < 4; i++)
136 
137  for (int i = 0; i < m->huff_ncode; i++) {
138  int table_id = m->huff_buffer[i].table_id;
139  int code = m->huff_buffer[i].code;
140 
142  }
143 
144  ff_mjpeg_encode_huffman_close(&dc_luminance_ctx,
146  m->val_dc_luminance, 12);
147  ff_mjpeg_encode_huffman_close(&dc_chrominance_ctx,
149  m->val_dc_chrominance, 12);
150  ff_mjpeg_encode_huffman_close(&ac_luminance_ctx,
152  m->val_ac_luminance, 256);
153  ff_mjpeg_encode_huffman_close(&ac_chrominance_ctx,
155  m->val_ac_chrominance, 256);
156 
160  m->val_dc_luminance);
164  m->val_dc_chrominance);
168  m->val_ac_luminance);
172  m->val_ac_chrominance);
173 }
174 
175 /**
176  * Writes the complete JPEG frame when optimal huffman tables are enabled,
177  * otherwise writes the stuffing.
178  *
179  * Header + values + stuffing.
180  *
181  * @param s The MpegEncContext.
182  * @return int Error code, 0 if successful.
183  */
185 {
186  PutBitContext *pbc = &s->pb;
187  int mb_y = s->mb_y - !s->mb_x;
188  int ret;
189  MJpegContext *m;
190 
191  m = s->mjpeg_ctx;
192 
193  if (s->huffman == HUFFMAN_TABLE_OPTIMAL) {
195 
196  // Replace the VLCs with the optimal ones.
197  // The default ones may be used for trellis during quantization.
200  s->intra_ac_vlc_length =
201  s->intra_ac_vlc_last_length = m->uni_ac_vlc_len;
202  s->intra_chroma_ac_vlc_length =
203  s->intra_chroma_ac_vlc_last_length = m->uni_chroma_ac_vlc_len;
204 
205  ff_mjpeg_encode_picture_header(s->avctx, &s->pb, &s->intra_scantable,
206  s->pred, s->intra_matrix, s->chroma_intra_matrix);
208  }
209 
210  ret = ff_mpv_reallocate_putbitbuffer(s, put_bits_count(&s->pb) / 8 + 100,
211  put_bits_count(&s->pb) / 4 + 1000);
212  if (ret < 0) {
213  av_log(s->avctx, AV_LOG_ERROR, "Buffer reallocation failed\n");
214  goto fail;
215  }
216 
217  ff_mjpeg_escape_FF(pbc, s->esc_pos);
218 
219  if ((s->avctx->active_thread_type & FF_THREAD_SLICE) && mb_y < s->mb_height - 1)
220  put_marker(pbc, RST0 + (mb_y&7));
221  s->esc_pos = put_bits_count(pbc) >> 3;
222 
223 fail:
224  for (int i = 0; i < 3; i++)
225  s->last_dc[i] = 128 << s->intra_dc_precision;
226 
227  return ret;
228 }
229 
231 {
232  MJpegContext *m = s->mjpeg_ctx;
233  size_t num_mbs, num_blocks, num_codes;
234  int blocks_per_mb;
235 
236  // We need to init this here as the mjpeg init is called before the common init,
237  s->mb_width = (s->width + 15) / 16;
238  s->mb_height = (s->height + 15) / 16;
239 
240  switch (s->chroma_format) {
241  case CHROMA_420: blocks_per_mb = 6; break;
242  case CHROMA_422: blocks_per_mb = 8; break;
243  case CHROMA_444: blocks_per_mb = 12; break;
244  default: av_assert0(0);
245  };
246 
247  // Make sure we have enough space to hold this frame.
248  num_mbs = s->mb_width * s->mb_height;
249  num_blocks = num_mbs * blocks_per_mb;
250  num_codes = num_blocks * 64;
251 
252  m->huff_buffer = av_malloc_array(num_codes, sizeof(MJpegHuffmanCode));
253  if (!m->huff_buffer)
254  return AVERROR(ENOMEM);
255  return 0;
256 }
257 
259 {
260  MJpegContext *m;
261 
262  av_assert0(s->slice_context_count == 1);
263 
264  if (s->width > 65500 || s->height > 65500) {
265  av_log(s, AV_LOG_ERROR, "JPEG does not support resolutions above 65500x65500\n");
266  return AVERROR(EINVAL);
267  }
268 
269  m = av_mallocz(sizeof(MJpegContext));
270  if (!m)
271  return AVERROR(ENOMEM);
272 
273  s->min_qcoeff=-1023;
274  s->max_qcoeff= 1023;
275 
276  // Build default Huffman tables.
277  // These may be overwritten later with more optimal Huffman tables, but
278  // they are needed at least right now for some processes like trellis.
295 
298  s->intra_ac_vlc_length =
299  s->intra_ac_vlc_last_length = m->uni_ac_vlc_len;
300  s->intra_chroma_ac_vlc_length =
301  s->intra_chroma_ac_vlc_last_length = m->uni_chroma_ac_vlc_len;
302 
303  // Buffers start out empty.
304  m->huff_ncode = 0;
305  s->mjpeg_ctx = m;
306 
307  if(s->huffman == HUFFMAN_TABLE_OPTIMAL)
308  return alloc_huffman(s);
309 
310  return 0;
311 }
312 
314 {
315  if (s->mjpeg_ctx) {
316  av_freep(&s->mjpeg_ctx->huff_buffer);
317  av_freep(&s->mjpeg_ctx);
318  }
319 }
320 
321 /**
322  * Add code and table_id to the JPEG buffer.
323  *
324  * @param s The MJpegContext which contains the JPEG buffer.
325  * @param table_id Which Huffman table the code belongs to.
326  * @param code The encoded exponent of the coefficients and the run-bits.
327  */
328 static inline void ff_mjpeg_encode_code(MJpegContext *s, uint8_t table_id, int code)
329 {
330  MJpegHuffmanCode *c = &s->huff_buffer[s->huff_ncode++];
331  c->table_id = table_id;
332  c->code = code;
333 }
334 
335 /**
336  * Add the coefficient's data to the JPEG buffer.
337  *
338  * @param s The MJpegContext which contains the JPEG buffer.
339  * @param table_id Which Huffman table the code belongs to.
340  * @param val The coefficient.
341  * @param run The run-bits.
342  */
343 static void ff_mjpeg_encode_coef(MJpegContext *s, uint8_t table_id, int val, int run)
344 {
345  int mant, code;
346 
347  if (val == 0) {
348  av_assert0(run == 0);
349  ff_mjpeg_encode_code(s, table_id, 0);
350  } else {
351  mant = val;
352  if (val < 0) {
353  val = -val;
354  mant--;
355  }
356 
357  code = (run << 4) | (av_log2_16bit(val) + 1);
358 
359  s->huff_buffer[s->huff_ncode].mant = mant;
360  ff_mjpeg_encode_code(s, table_id, code);
361  }
362 }
363 
364 /**
365  * Add the block's data into the JPEG buffer.
366  *
367  * @param s The MJpegEncContext that contains the JPEG buffer.
368  * @param block The block.
369  * @param n The block's index or number.
370  */
371 static void record_block(MpegEncContext *s, int16_t *block, int n)
372 {
373  int i, j, table_id;
374  int component, dc, last_index, val, run;
375  MJpegContext *m = s->mjpeg_ctx;
376 
377  /* DC coef */
378  component = (n <= 3 ? 0 : (n&1) + 1);
379  table_id = (n <= 3 ? 0 : 1);
380  dc = block[0]; /* overflow is impossible */
381  val = dc - s->last_dc[component];
382 
383  ff_mjpeg_encode_coef(m, table_id, val, 0);
384 
385  s->last_dc[component] = dc;
386 
387  /* AC coefs */
388 
389  run = 0;
390  last_index = s->block_last_index[n];
391  table_id |= 2;
392 
393  for(i=1;i<=last_index;i++) {
394  j = s->intra_scantable.permutated[i];
395  val = block[j];
396 
397  if (val == 0) {
398  run++;
399  } else {
400  while (run >= 16) {
401  ff_mjpeg_encode_code(m, table_id, 0xf0);
402  run -= 16;
403  }
404  ff_mjpeg_encode_coef(m, table_id, val, run);
405  run = 0;
406  }
407  }
408 
409  /* output EOB only if not already 64 values */
410  if (last_index < 63 || run != 0)
411  ff_mjpeg_encode_code(m, table_id, 0);
412 }
413 
414 static void encode_block(MpegEncContext *s, int16_t *block, int n)
415 {
416  int mant, nbits, code, i, j;
417  int component, dc, run, last_index, val;
418  MJpegContext *m = s->mjpeg_ctx;
419  uint8_t *huff_size_ac;
420  uint16_t *huff_code_ac;
421 
422  /* DC coef */
423  component = (n <= 3 ? 0 : (n&1) + 1);
424  dc = block[0]; /* overflow is impossible */
425  val = dc - s->last_dc[component];
426  if (n < 4) {
428  huff_size_ac = m->huff_size_ac_luminance;
429  huff_code_ac = m->huff_code_ac_luminance;
430  } else {
432  huff_size_ac = m->huff_size_ac_chrominance;
433  huff_code_ac = m->huff_code_ac_chrominance;
434  }
435  s->last_dc[component] = dc;
436 
437  /* AC coefs */
438 
439  run = 0;
440  last_index = s->block_last_index[n];
441  for(i=1;i<=last_index;i++) {
442  j = s->intra_scantable.permutated[i];
443  val = block[j];
444  if (val == 0) {
445  run++;
446  } else {
447  while (run >= 16) {
448  put_bits(&s->pb, huff_size_ac[0xf0], huff_code_ac[0xf0]);
449  run -= 16;
450  }
451  mant = val;
452  if (val < 0) {
453  val = -val;
454  mant--;
455  }
456 
457  nbits= av_log2_16bit(val) + 1;
458  code = (run << 4) | nbits;
459 
460  put_bits(&s->pb, huff_size_ac[code], huff_code_ac[code]);
461 
462  put_sbits(&s->pb, nbits, mant);
463  run = 0;
464  }
465  }
466 
467  /* output EOB only if not already 64 values */
468  if (last_index < 63 || run != 0)
469  put_bits(&s->pb, huff_size_ac[0], huff_code_ac[0]);
470 }
471 
472 void ff_mjpeg_encode_mb(MpegEncContext *s, int16_t block[12][64])
473 {
474  int i;
475  if (s->huffman == HUFFMAN_TABLE_OPTIMAL) {
476  if (s->chroma_format == CHROMA_444) {
477  record_block(s, block[0], 0);
478  record_block(s, block[2], 2);
479  record_block(s, block[4], 4);
480  record_block(s, block[8], 8);
481  record_block(s, block[5], 5);
482  record_block(s, block[9], 9);
483 
484  if (16*s->mb_x+8 < s->width) {
485  record_block(s, block[1], 1);
486  record_block(s, block[3], 3);
487  record_block(s, block[6], 6);
488  record_block(s, block[10], 10);
489  record_block(s, block[7], 7);
490  record_block(s, block[11], 11);
491  }
492  } else {
493  for(i=0;i<5;i++) {
494  record_block(s, block[i], i);
495  }
496  if (s->chroma_format == CHROMA_420) {
497  record_block(s, block[5], 5);
498  } else {
499  record_block(s, block[6], 6);
500  record_block(s, block[5], 5);
501  record_block(s, block[7], 7);
502  }
503  }
504  } else {
505  if (s->chroma_format == CHROMA_444) {
506  encode_block(s, block[0], 0);
507  encode_block(s, block[2], 2);
508  encode_block(s, block[4], 4);
509  encode_block(s, block[8], 8);
510  encode_block(s, block[5], 5);
511  encode_block(s, block[9], 9);
512 
513  if (16*s->mb_x+8 < s->width) {
514  encode_block(s, block[1], 1);
515  encode_block(s, block[3], 3);
516  encode_block(s, block[6], 6);
517  encode_block(s, block[10], 10);
518  encode_block(s, block[7], 7);
519  encode_block(s, block[11], 11);
520  }
521  } else {
522  for(i=0;i<5;i++) {
523  encode_block(s, block[i], i);
524  }
525  if (s->chroma_format == CHROMA_420) {
526  encode_block(s, block[5], 5);
527  } else {
528  encode_block(s, block[6], 6);
529  encode_block(s, block[5], 5);
530  encode_block(s, block[7], 7);
531  }
532  }
533 
534  s->i_tex_bits += get_bits_diff(s);
535  }
536 }
537 
538 #if CONFIG_AMV_ENCODER
539 // maximum over s->mjpeg_vsample[i]
540 #define V_MAX 2
541 static int amv_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
542  const AVFrame *pic_arg, int *got_packet)
543 {
544  MpegEncContext *s = avctx->priv_data;
545  AVFrame *pic;
546  int i, ret;
547  int chroma_h_shift, chroma_v_shift;
548 
549  av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_h_shift, &chroma_v_shift);
550 
551  if ((avctx->height & 15) && avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
552  av_log(avctx, AV_LOG_ERROR,
553  "Heights which are not a multiple of 16 might fail with some decoders, "
554  "use vstrict=-1 / -strict -1 to use %d anyway.\n", avctx->height);
555  av_log(avctx, AV_LOG_WARNING, "If you have a device that plays AMV videos, please test if videos "
556  "with such heights work with it and report your findings to ffmpeg-devel@ffmpeg.org\n");
557  return AVERROR_EXPERIMENTAL;
558  }
559 
560  pic = av_frame_clone(pic_arg);
561  if (!pic)
562  return AVERROR(ENOMEM);
563  //picture should be flipped upside-down
564  for(i=0; i < 3; i++) {
565  int vsample = i ? 2 >> chroma_v_shift : 2;
566  pic->data[i] += pic->linesize[i] * (vsample * s->height / V_MAX - 1);
567  pic->linesize[i] *= -1;
568  }
569  ret = ff_mpv_encode_picture(avctx, pkt, pic, got_packet);
570  av_frame_free(&pic);
571  return ret;
572 }
573 #endif
574 
575 #define OFFSET(x) offsetof(MpegEncContext, x)
576 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
577 static const AVOption options[] = {
579 { "pred", "Prediction method", OFFSET(pred), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, 3, VE, "pred" },
580  { "left", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "pred" },
581  { "plane", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE, "pred" },
582  { "median", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 3 }, INT_MIN, INT_MAX, VE, "pred" },
583 { "huffman", "Huffman table strategy", OFFSET(huffman), AV_OPT_TYPE_INT, { .i64 = HUFFMAN_TABLE_OPTIMAL }, 0, NB_HUFFMAN_TABLE_OPTION - 1, VE, "huffman" },
584  { "default", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = HUFFMAN_TABLE_DEFAULT }, INT_MIN, INT_MAX, VE, "huffman" },
585  { "optimal", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = HUFFMAN_TABLE_OPTIMAL }, INT_MIN, INT_MAX, VE, "huffman" },
586 { NULL},
587 };
588 
589 #if CONFIG_MJPEG_ENCODER
590 static const AVClass mjpeg_class = {
591  .class_name = "mjpeg encoder",
592  .item_name = av_default_item_name,
593  .option = options,
594  .version = LIBAVUTIL_VERSION_INT,
595 };
596 
598  .name = "mjpeg",
599  .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
600  .type = AVMEDIA_TYPE_VIDEO,
601  .id = AV_CODEC_ID_MJPEG,
602  .priv_data_size = sizeof(MpegEncContext),
604  .encode2 = ff_mpv_encode_picture,
605  .close = ff_mpv_encode_end,
608  .pix_fmts = (const enum AVPixelFormat[]) {
610  },
611  .priv_class = &mjpeg_class,
613 };
614 #endif
615 
616 #if CONFIG_AMV_ENCODER
617 static const AVClass amv_class = {
618  .class_name = "amv encoder",
619  .item_name = av_default_item_name,
620  .option = options,
621  .version = LIBAVUTIL_VERSION_INT,
622 };
623 
625  .name = "amv",
626  .long_name = NULL_IF_CONFIG_SMALL("AMV Video"),
627  .type = AVMEDIA_TYPE_VIDEO,
628  .id = AV_CODEC_ID_AMV,
629  .priv_data_size = sizeof(MpegEncContext),
631  .encode2 = amv_encode_picture,
632  .close = ff_mpv_encode_end,
634  .pix_fmts = (const enum AVPixelFormat[]) {
636  },
637  .priv_class = &amv_class,
638 };
639 #endif
static double val(void *priv, double ch)
Definition: aeval.c:76
AVCodec ff_mjpeg_encoder
AVCodec ff_amv_encoder
#define av_cold
Definition: attributes.h:88
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> dc
uint8_t
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
Libavcodec external API header.
#define FF_COMPLIANCE_UNOFFICIAL
Allow unofficial extensions.
Definition: avcodec.h:1605
#define FF_THREAD_SLICE
Decode more than one part of a single frame at once.
Definition: avcodec.h:1785
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
#define s(width, name)
Definition: cbs_vp9.c:257
#define fail()
Definition: checkasm.h:133
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
#define NULL
Definition: coverity.c:32
@ AV_OPT_TYPE_CONST
Definition: opt.h:234
@ AV_OPT_TYPE_INT
Definition: opt.h:225
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: codec.h:112
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: codec.h:108
@ AV_CODEC_ID_MJPEG
Definition: codec_id.h:56
@ AV_CODEC_ID_AMV
Definition: codec_id.h:156
#define AVERROR_EXPERIMENTAL
Requested feature is flagged experimental. Set strict_std_compliance if you really want to use it.
Definition: error.h:72
#define AVERROR(e)
Definition: error.h:43
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:540
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
#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
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
int i
Definition: input.c:407
#define av_log2_16bit
Definition: intmath.h:84
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:218
const uint8_t avpriv_mjpeg_val_dc[12]
Definition: jpegtables.c:67
const uint8_t avpriv_mjpeg_bits_ac_chrominance[17]
Definition: jpegtables.c:99
const uint8_t avpriv_mjpeg_val_ac_chrominance[]
Definition: jpegtables.c:102
const uint8_t avpriv_mjpeg_bits_dc_luminance[17]
Definition: jpegtables.c:65
const uint8_t avpriv_mjpeg_val_ac_luminance[]
Definition: jpegtables.c:75
const uint8_t avpriv_mjpeg_bits_dc_chrominance[17]
Definition: jpegtables.c:70
const uint8_t avpriv_mjpeg_bits_ac_luminance[17]
Definition: jpegtables.c:73
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:41
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: internal.h:49
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:303
MJPEG encoder and decoder.
@ RST0
Definition: mjpeg.h:61
void ff_mjpeg_encode_mb(MpegEncContext *s, int16_t block[12][64])
Definition: mjpegenc.c:472
static int alloc_huffman(MpegEncContext *s)
Definition: mjpegenc.c:230
static const AVOption options[]
Definition: mjpegenc.c:577
av_cold int ff_mjpeg_encode_init(MpegEncContext *s)
Definition: mjpegenc.c:258
#define VE
Definition: mjpegenc.c:576
static av_cold void init_uni_ac_vlc(const uint8_t huff_size_ac[256], uint8_t *uni_ac_vlc_len)
Definition: mjpegenc.c:44
static void ff_mjpeg_encode_code(MJpegContext *s, uint8_t table_id, int code)
Add code and table_id to the JPEG buffer.
Definition: mjpegenc.c:328
static void record_block(MpegEncContext *s, int16_t *block, int n)
Add the block's data into the JPEG buffer.
Definition: mjpegenc.c:371
static void encode_block(MpegEncContext *s, int16_t *block, int n)
Definition: mjpegenc.c:414
static void mjpeg_encode_picture_frame(MpegEncContext *s)
Encodes and outputs the entire frame in the JPEG format.
Definition: mjpegenc.c:73
int ff_mjpeg_encode_stuffing(MpegEncContext *s)
Writes the complete JPEG frame when optimal huffman tables are enabled, otherwise writes the stuffing...
Definition: mjpegenc.c:184
av_cold void ff_mjpeg_encode_close(MpegEncContext *s)
Definition: mjpegenc.c:313
#define OFFSET(x)
Definition: mjpegenc.c:575
static void ff_mjpeg_encode_coef(MJpegContext *s, uint8_t table_id, int val, int run)
Add the coefficient's data to the JPEG buffer.
Definition: mjpegenc.c:343
static void mjpeg_build_optimal_huffman(MJpegContext *m)
Builds all 4 optimal Huffman tables.
Definition: mjpegenc.c:124
MJPEG encoder.
@ HUFFMAN_TABLE_OPTIMAL
Compute and use optimal Huffman tables.
Definition: mjpegenc.h:97
@ NB_HUFFMAN_TABLE_OPTION
Definition: mjpegenc.h:98
@ HUFFMAN_TABLE_DEFAULT
Use the default Huffman tables.
Definition: mjpegenc.h:96
static void put_marker(PutBitContext *p, enum JpegMarker code)
Definition: mjpegenc.h:101
void ff_mjpeg_encode_picture_header(AVCodecContext *avctx, PutBitContext *pb, ScanTable *intra_scantable, int pred, uint16_t luma_intra_matrix[64], uint16_t chroma_intra_matrix[64])
void ff_mjpeg_escape_FF(PutBitContext *pb, int start)
void ff_mjpeg_build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code, const uint8_t *bits_table, const uint8_t *val_table)
void ff_mjpeg_encode_dc(PutBitContext *pb, int val, uint8_t *huff_size, uint16_t *huff_code)
void ff_mjpeg_encode_huffman_init(MJpegEncHuffmanContext *s)
void ff_mjpeg_encode_huffman_close(MJpegEncHuffmanContext *s, uint8_t bits[17], uint8_t val[], int max_nval)
Produces a Huffman encoding with a given input.
Huffman table generation for MJPEG encoder.
static void ff_mjpeg_encode_huffman_increment(MJpegEncHuffmanContext *s, uint8_t val)
mpegvideo header.
int ff_mpv_encode_end(AVCodecContext *avctx)
int ff_mpv_encode_picture(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
static int get_bits_diff(MpegEncContext *s)
Definition: mpegvideo.h:765
#define CHROMA_420
Definition: mpegvideo.h:488
#define UNI_AC_ENC_INDEX(run, level)
Definition: mpegvideo.h:318
#define CHROMA_444
Definition: mpegvideo.h:490
#define FF_MPV_COMMON_OPTS
Definition: mpegvideo.h:629
int ff_mpv_reallocate_putbitbuffer(MpegEncContext *s, size_t threshold, size_t size_increase)
#define CHROMA_422
Definition: mpegvideo.h:489
int ff_mpv_encode_init(AVCodecContext *avctx)
int av_pix_fmt_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift)
Utility function to access log2_chroma_w log2_chroma_h from the pixel format AVPixFmtDescriptor.
Definition: pixdesc.c:2601
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
@ AV_PIX_FMT_YUVJ422P
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:79
@ AV_PIX_FMT_YUVJ444P
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:80
@ AV_PIX_FMT_YUVJ420P
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:78
const AVProfile ff_mjpeg_profiles[]
Definition: profiles.c:169
static void put_sbits(PutBitContext *pb, int n, int32_t value)
Definition: put_bits.h:253
static int put_bits_count(PutBitContext *s)
Definition: put_bits.h:76
static const float pred[4]
Definition: siprdata.h:259
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 strict_std_compliance
strictly follow the standard (MPEG-4, ...).
Definition: avcodec.h:1601
void * priv_data
Definition: avcodec.h:563
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 linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:349
AVOption.
Definition: opt.h:248
This structure stores compressed data.
Definition: packet.h:346
Holds JPEG frame data and Huffman table data.
Definition: mjpegenc.h:59
uint8_t huff_size_dc_chrominance[12]
DC chrominance Huffman table size.
Definition: mjpegenc.h:63
uint8_t huff_size_ac_chrominance[256]
AC chrominance Huffman table size.
Definition: mjpegenc.h:68
uint8_t bits_dc_luminance[17]
DC luminance Huffman bits.
Definition: mjpegenc.h:77
uint8_t huff_size_dc_luminance[12]
DC luminance Huffman table size.
Definition: mjpegenc.h:61
uint8_t bits_ac_luminance[17]
AC luminance Huffman bits.
Definition: mjpegenc.h:83
uint16_t huff_code_ac_luminance[256]
AC luminance Huffman table codes.
Definition: mjpegenc.h:67
uint16_t huff_code_ac_chrominance[256]
AC chrominance Huffman table codes.
Definition: mjpegenc.h:69
MJpegHuffmanCode * huff_buffer
Buffer for Huffman code values.
Definition: mjpegenc.h:89
size_t huff_ncode
Number of current entries in the buffer.
Definition: mjpegenc.h:88
uint8_t val_ac_luminance[256]
AC luminance Huffman values.
Definition: mjpegenc.h:84
uint8_t val_ac_chrominance[256]
AC chrominance Huffman values.
Definition: mjpegenc.h:86
uint16_t huff_code_dc_chrominance[12]
DC chrominance Huffman table codes.
Definition: mjpegenc.h:64
uint8_t huff_size_ac_luminance[256]
AC luminance Huffman table size.
Definition: mjpegenc.h:66
uint8_t bits_dc_chrominance[17]
DC chrominance Huffman bits.
Definition: mjpegenc.h:79
uint8_t val_dc_luminance[12]
DC luminance Huffman values.
Definition: mjpegenc.h:78
uint16_t huff_code_dc_luminance[12]
DC luminance Huffman table codes.
Definition: mjpegenc.h:62
uint8_t uni_chroma_ac_vlc_len[64 *64 *2]
Storage for AC chrominance VLC (in MpegEncContext)
Definition: mjpegenc.h:74
uint8_t uni_ac_vlc_len[64 *64 *2]
Storage for AC luminance VLC (in MpegEncContext)
Definition: mjpegenc.h:72
uint8_t bits_ac_chrominance[17]
AC chrominance Huffman bits.
Definition: mjpegenc.h:85
uint8_t val_dc_chrominance[12]
DC chrominance Huffman values.
Definition: mjpegenc.h:80
Buffer of JPEG frame data.
Definition: mjpegenc.h:49
uint16_t mant
The mantissa.
Definition: mjpegenc.h:53
uint8_t table_id
The Huffman table id associated with the data.
Definition: mjpegenc.h:51
uint8_t code
The exponent.
Definition: mjpegenc.h:52
MpegEncContext.
Definition: mpegvideo.h:81
uint8_t run
Definition: svq3.c:205
uint8_t level
Definition: svq3.c:206
#define av_malloc_array(a, b)
#define av_freep(p)
#define av_log(a,...)
static int16_t block[64]
Definition: dct.c:116
AVPacket * pkt
Definition: movenc.c:59
AVFormatContext * ctx
Definition: movenc.c:48
int len
static double c[64]