FFmpeg  4.1.11
dnxhddec.c
Go to the documentation of this file.
1 /*
2  * VC3/DNxHD decoder.
3  * Copyright (c) 2007 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
4  * Copyright (c) 2011 MirriAd Ltd
5  * Copyright (c) 2015 Christophe Gisquet
6  *
7  * 10 bit support added by MirriAd Ltd, Joseph Artsimovich <joseph@mirriad.com>
8  * Slice multithreading and MB interlaced support added by Christophe Gisquet
9  *
10  * This file is part of FFmpeg.
11  *
12  * FFmpeg is free software; you can redistribute it and/or
13  * modify it under the terms of the GNU Lesser General Public
14  * License as published by the Free Software Foundation; either
15  * version 2.1 of the License, or (at your option) any later version.
16  *
17  * FFmpeg is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20  * Lesser General Public License for more details.
21  *
22  * You should have received a copy of the GNU Lesser General Public
23  * License along with FFmpeg; if not, write to the Free Software
24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25  */
26 
27 #include "libavutil/imgutils.h"
28 #include "libavutil/timer.h"
29 #include "avcodec.h"
30 #include "blockdsp.h"
31 #define UNCHECKED_BITSTREAM_READER 1
32 #include "get_bits.h"
33 #include "dnxhddata.h"
34 #include "idctdsp.h"
35 #include "internal.h"
36 #include "profiles.h"
37 #include "thread.h"
38 
39 typedef struct RowContext {
40  DECLARE_ALIGNED(16, int16_t, blocks)[12][64];
41  int luma_scale[64];
42  int chroma_scale[64];
44  int last_dc[3];
46  int errors;
47  /** -1:not set yet 0:off=RGB 1:on=YUV 2:variable */
48  int format;
49 } RowContext;
50 
51 typedef struct DNXHDContext {
55  const uint8_t* buf;
56  int buf_size;
57  int64_t cid; ///< compression id
58  unsigned int width, height;
60  unsigned int mb_width, mb_height;
61  uint32_t mb_scan_index[512];
62  int data_offset; // End of mb_scan_index, where macroblocks start
63  int cur_field; ///< current interlaced field
64  VLC ac_vlc, dc_vlc, run_vlc;
68  int bit_depth; // 8, 10, 12 or 0 if not initialized at all.
69  int is_444;
70  int alpha;
71  int lla;
72  int mbaff;
73  int act;
75  RowContext *row, int n);
76 } DNXHDContext;
77 
78 #define DNXHD_VLC_BITS 9
79 #define DNXHD_DC_VLC_BITS 7
80 
81 static int dnxhd_decode_dct_block_8(const DNXHDContext *ctx,
82  RowContext *row, int n);
84  RowContext *row, int n);
86  RowContext *row, int n);
88  RowContext *row, int n);
90  RowContext *row, int n);
91 
93 {
94  DNXHDContext *ctx = avctx->priv_data;
95 
96  ctx->avctx = avctx;
97  ctx->cid = -1;
98  if (avctx->colorspace == AVCOL_SPC_UNSPECIFIED) {
99  avctx->colorspace = AVCOL_SPC_BT709;
100  }
101 
102  avctx->coded_width = FFALIGN(avctx->width, 16);
103  avctx->coded_height = FFALIGN(avctx->height, 16);
104 
105  ctx->rows = av_mallocz_array(avctx->thread_count, sizeof(RowContext));
106  if (!ctx->rows)
107  return AVERROR(ENOMEM);
108 
109  return 0;
110 }
111 
112 static int dnxhd_init_vlc(DNXHDContext *ctx, uint32_t cid, int bitdepth)
113 {
114  int ret;
115  if (cid != ctx->cid) {
116  int index;
117 
118  if ((index = ff_dnxhd_get_cid_table(cid)) < 0) {
119  av_log(ctx->avctx, AV_LOG_ERROR, "unsupported cid %"PRIu32"\n", cid);
120  return AVERROR(ENOSYS);
121  }
122  if (ff_dnxhd_cid_table[index].bit_depth != bitdepth &&
124  av_log(ctx->avctx, AV_LOG_ERROR, "bit depth mismatches %d %d\n", ff_dnxhd_cid_table[index].bit_depth, bitdepth);
125  return AVERROR_INVALIDDATA;
126  }
128  av_log(ctx->avctx, AV_LOG_VERBOSE, "Profile cid %"PRIu32".\n", cid);
129 
130  ff_free_vlc(&ctx->ac_vlc);
131  ff_free_vlc(&ctx->dc_vlc);
132  ff_free_vlc(&ctx->run_vlc);
133 
134  if ((ret = init_vlc(&ctx->ac_vlc, DNXHD_VLC_BITS, 257,
135  ctx->cid_table->ac_bits, 1, 1,
136  ctx->cid_table->ac_codes, 2, 2, 0)) < 0)
137  goto out;
138  if ((ret = init_vlc(&ctx->dc_vlc, DNXHD_DC_VLC_BITS, bitdepth > 8 ? 14 : 12,
139  ctx->cid_table->dc_bits, 1, 1,
140  ctx->cid_table->dc_codes, 1, 1, 0)) < 0)
141  goto out;
142  if ((ret = init_vlc(&ctx->run_vlc, DNXHD_VLC_BITS, 62,
143  ctx->cid_table->run_bits, 1, 1,
144  ctx->cid_table->run_codes, 2, 2, 0)) < 0)
145  goto out;
146 
147  ctx->cid = cid;
148  }
149  ret = 0;
150 out:
151  if (ret < 0)
152  av_log(ctx->avctx, AV_LOG_ERROR, "init_vlc failed\n");
153  return ret;
154 }
155 
157 {
158  DNXHDContext *ctx = avctx->priv_data;
159 
160  ctx->avctx = avctx;
161  // make sure VLC tables will be loaded when cid is parsed
162  ctx->cid = -1;
163 
164  ctx->rows = av_mallocz_array(avctx->thread_count, sizeof(RowContext));
165  if (!ctx->rows)
166  return AVERROR(ENOMEM);
167 
168  return 0;
169 }
170 
171 static int dnxhd_get_profile(int cid)
172 {
173  switch(cid) {
174  case 1270:
175  return FF_PROFILE_DNXHR_444;
176  case 1271:
177  return FF_PROFILE_DNXHR_HQX;
178  case 1272:
179  return FF_PROFILE_DNXHR_HQ;
180  case 1273:
181  return FF_PROFILE_DNXHR_SQ;
182  case 1274:
183  return FF_PROFILE_DNXHR_LB;
184  }
185  return FF_PROFILE_DNXHD;
186 }
187 
189  const uint8_t *buf, int buf_size,
190  int first_field)
191 {
192  int i, cid, ret;
193  int old_bit_depth = ctx->bit_depth, bitdepth;
194  uint64_t header_prefix;
195  if (buf_size < 0x280) {
196  av_log(ctx->avctx, AV_LOG_ERROR,
197  "buffer too small (%d < 640).\n", buf_size);
198  return AVERROR_INVALIDDATA;
199  }
200 
201  header_prefix = ff_dnxhd_parse_header_prefix(buf);
202  if (header_prefix == 0) {
203  av_log(ctx->avctx, AV_LOG_ERROR,
204  "unknown header 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X\n",
205  buf[0], buf[1], buf[2], buf[3], buf[4]);
206  return AVERROR_INVALIDDATA;
207  }
208  if (buf[5] & 2) { /* interlaced */
209  ctx->cur_field = buf[5] & 1;
210  frame->interlaced_frame = 1;
211  frame->top_field_first = first_field ^ ctx->cur_field;
212  av_log(ctx->avctx, AV_LOG_DEBUG,
213  "interlaced %d, cur field %d\n", buf[5] & 3, ctx->cur_field);
214  } else {
215  ctx->cur_field = 0;
216  }
217  ctx->mbaff = (buf[0x6] >> 5) & 1;
218  ctx->alpha = buf[0x7] & 1;
219  ctx->lla = (buf[0x7] >> 1) & 1;
220  if (ctx->alpha)
221  avpriv_request_sample(ctx->avctx, "alpha");
222 
223  ctx->height = AV_RB16(buf + 0x18);
224  ctx->width = AV_RB16(buf + 0x1a);
225 
226  switch(buf[0x21] >> 5) {
227  case 1: bitdepth = 8; break;
228  case 2: bitdepth = 10; break;
229  case 3: bitdepth = 12; break;
230  default:
231  av_log(ctx->avctx, AV_LOG_ERROR,
232  "Unknown bitdepth indicator (%d)\n", buf[0x21] >> 5);
233  return AVERROR_INVALIDDATA;
234  }
235 
236  cid = AV_RB32(buf + 0x28);
237 
238  ctx->avctx->profile = dnxhd_get_profile(cid);
239 
240  if ((ret = dnxhd_init_vlc(ctx, cid, bitdepth)) < 0)
241  return ret;
242  if (ctx->mbaff && ctx->cid_table->cid != 1260)
244  "Adaptive MB interlace flag in an unsupported profile.\n");
245 
246  ctx->act = buf[0x2C] & 7;
247  if (ctx->act && ctx->cid_table->cid != 1256 && ctx->cid_table->cid != 1270)
249  "Adaptive color transform in an unsupported profile.\n");
250 
251  ctx->is_444 = (buf[0x2C] >> 6) & 1;
252  if (ctx->is_444) {
253  if (bitdepth == 8) {
254  avpriv_request_sample(ctx->avctx, "4:4:4 8 bits");
255  return AVERROR_INVALIDDATA;
256  } else if (bitdepth == 10) {
258  ctx->pix_fmt = ctx->act ? AV_PIX_FMT_YUV444P10
260  } else {
262  ctx->pix_fmt = ctx->act ? AV_PIX_FMT_YUV444P12
264  }
265  } else if (bitdepth == 12) {
268  } else if (bitdepth == 10) {
269  if (ctx->avctx->profile == FF_PROFILE_DNXHR_HQX)
271  else
274  } else {
277  }
278 
279  ctx->avctx->bits_per_raw_sample = ctx->bit_depth = bitdepth;
280  if (ctx->bit_depth != old_bit_depth) {
281  ff_blockdsp_init(&ctx->bdsp, ctx->avctx);
282  ff_idctdsp_init(&ctx->idsp, ctx->avctx);
285  }
286 
287  // make sure profile size constraints are respected
288  // DNx100 allows 1920->1440 and 1280->960 subsampling
289  if (ctx->width != ctx->cid_table->width &&
290  ctx->cid_table->width != DNXHD_VARIABLE) {
293  ctx->width, ctx->cid_table->width, 255);
294  ctx->width = ctx->cid_table->width;
295  }
296 
297  if (buf_size < ctx->cid_table->coding_unit_size) {
298  av_log(ctx->avctx, AV_LOG_ERROR, "incorrect frame size (%d < %u).\n",
299  buf_size, ctx->cid_table->coding_unit_size);
300  return AVERROR_INVALIDDATA;
301  }
302 
303  ctx->mb_width = (ctx->width + 15)>> 4;
304  ctx->mb_height = AV_RB16(buf + 0x16c);
305 
306  if ((ctx->height + 15) >> 4 == ctx->mb_height && frame->interlaced_frame)
307  ctx->height <<= 1;
308 
309  av_log(ctx->avctx, AV_LOG_VERBOSE, "%dx%d, 4:%s %d bits, MBAFF=%d ACT=%d\n",
310  ctx->width, ctx->height, ctx->is_444 ? "4:4" : "2:2",
311  ctx->bit_depth, ctx->mbaff, ctx->act);
312 
313  // Newer format supports variable mb_scan_index sizes
314  if (ctx->mb_height > 68 && ff_dnxhd_check_header_prefix_hr(header_prefix)) {
315  ctx->data_offset = 0x170 + (ctx->mb_height << 2);
316  } else {
317  if (ctx->mb_height > 68) {
318  av_log(ctx->avctx, AV_LOG_ERROR,
319  "mb height too big: %d\n", ctx->mb_height);
320  return AVERROR_INVALIDDATA;
321  }
322  ctx->data_offset = 0x280;
323  }
324  if ((ctx->mb_height << frame->interlaced_frame) > (ctx->height + 15) >> 4) {
325  av_log(ctx->avctx, AV_LOG_ERROR,
326  "mb height too big: %d\n", ctx->mb_height);
327  return AVERROR_INVALIDDATA;
328  }
329 
330  if (buf_size < ctx->data_offset) {
331  av_log(ctx->avctx, AV_LOG_ERROR,
332  "buffer too small (%d < %d).\n", buf_size, ctx->data_offset);
333  return AVERROR_INVALIDDATA;
334  }
335 
336  if (ctx->mb_height > FF_ARRAY_ELEMS(ctx->mb_scan_index)) {
337  av_log(ctx->avctx, AV_LOG_ERROR,
338  "mb_height too big (%d > %"SIZE_SPECIFIER").\n", ctx->mb_height, FF_ARRAY_ELEMS(ctx->mb_scan_index));
339  return AVERROR_INVALIDDATA;
340  }
341 
342  for (i = 0; i < ctx->mb_height; i++) {
343  ctx->mb_scan_index[i] = AV_RB32(buf + 0x170 + (i << 2));
344  ff_dlog(ctx->avctx, "mb scan index %d, pos %d: %"PRIu32"\n",
345  i, 0x170 + (i << 2), ctx->mb_scan_index[i]);
346  if (buf_size - ctx->data_offset < ctx->mb_scan_index[i]) {
347  av_log(ctx->avctx, AV_LOG_ERROR,
348  "invalid mb scan index (%"PRIu32" vs %u).\n",
349  ctx->mb_scan_index[i], buf_size - ctx->data_offset);
350  return AVERROR_INVALIDDATA;
351  }
352  }
353 
354  return 0;
355 }
356 
358  RowContext *row,
359  int n,
360  int index_bits,
361  int level_bias,
362  int level_shift,
363  int dc_shift)
364 {
365  int i, j, index1, index2, len, flags;
366  int level, component, sign;
367  const int *scale;
368  const uint8_t *weight_matrix;
369  const uint8_t *ac_info = ctx->cid_table->ac_info;
370  int16_t *block = row->blocks[n];
371  const int eob_index = ctx->cid_table->eob_index;
372  int ret = 0;
373  OPEN_READER(bs, &row->gb);
374 
375  ctx->bdsp.clear_block(block);
376 
377  if (!ctx->is_444) {
378  if (n & 2) {
379  component = 1 + (n & 1);
380  scale = row->chroma_scale;
381  weight_matrix = ctx->cid_table->chroma_weight;
382  } else {
383  component = 0;
384  scale = row->luma_scale;
385  weight_matrix = ctx->cid_table->luma_weight;
386  }
387  } else {
388  component = (n >> 1) % 3;
389  if (component) {
390  scale = row->chroma_scale;
391  weight_matrix = ctx->cid_table->chroma_weight;
392  } else {
393  scale = row->luma_scale;
394  weight_matrix = ctx->cid_table->luma_weight;
395  }
396  }
397 
398  UPDATE_CACHE(bs, &row->gb);
399  GET_VLC(len, bs, &row->gb, ctx->dc_vlc.table, DNXHD_DC_VLC_BITS, 1);
400  if (len < 0) {
401  ret = len;
402  goto error;
403  }
404  if (len) {
405  level = GET_CACHE(bs, &row->gb);
406  LAST_SKIP_BITS(bs, &row->gb, len);
407  sign = ~level >> 31;
408  level = (NEG_USR32(sign ^ level, len) ^ sign) - sign;
409  row->last_dc[component] += level * (1 << dc_shift);
410  }
411  block[0] = row->last_dc[component];
412 
413  i = 0;
414 
415  UPDATE_CACHE(bs, &row->gb);
416  GET_VLC(index1, bs, &row->gb, ctx->ac_vlc.table,
417  DNXHD_VLC_BITS, 2);
418 
419  while (index1 != eob_index) {
420  level = ac_info[2*index1+0];
421  flags = ac_info[2*index1+1];
422 
423  sign = SHOW_SBITS(bs, &row->gb, 1);
424  SKIP_BITS(bs, &row->gb, 1);
425 
426  if (flags & 1) {
427  level += SHOW_UBITS(bs, &row->gb, index_bits) << 7;
428  SKIP_BITS(bs, &row->gb, index_bits);
429  }
430 
431  if (flags & 2) {
432  UPDATE_CACHE(bs, &row->gb);
433  GET_VLC(index2, bs, &row->gb, ctx->run_vlc.table,
434  DNXHD_VLC_BITS, 2);
435  i += ctx->cid_table->run[index2];
436  }
437 
438  if (++i > 63) {
439  av_log(ctx->avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", n, i);
440  ret = -1;
441  break;
442  }
443 
444  j = ctx->scantable.permutated[i];
445  level *= scale[i];
446  level += scale[i] >> 1;
447  if (level_bias < 32 || weight_matrix[i] != level_bias)
448  level += level_bias; // 1<<(level_shift-1)
449  level >>= level_shift;
450 
451  block[j] = (level ^ sign) - sign;
452 
453  UPDATE_CACHE(bs, &row->gb);
454  GET_VLC(index1, bs, &row->gb, ctx->ac_vlc.table,
455  DNXHD_VLC_BITS, 2);
456  }
457 error:
458  CLOSE_READER(bs, &row->gb);
459  return ret;
460 }
461 
463  RowContext *row, int n)
464 {
465  return dnxhd_decode_dct_block(ctx, row, n, 4, 32, 6, 0);
466 }
467 
469  RowContext *row, int n)
470 {
471  return dnxhd_decode_dct_block(ctx, row, n, 6, 8, 4, 0);
472 }
473 
475  RowContext *row, int n)
476 {
477  return dnxhd_decode_dct_block(ctx, row, n, 6, 32, 6, 0);
478 }
479 
481  RowContext *row, int n)
482 {
483  return dnxhd_decode_dct_block(ctx, row, n, 6, 8, 4, 2);
484 }
485 
487  RowContext *row, int n)
488 {
489  return dnxhd_decode_dct_block(ctx, row, n, 6, 32, 4, 2);
490 }
491 
493  AVFrame *frame, int x, int y)
494 {
495  int shift1 = ctx->bit_depth >= 10;
496  int dct_linesize_luma = frame->linesize[0];
497  int dct_linesize_chroma = frame->linesize[1];
498  uint8_t *dest_y, *dest_u, *dest_v;
499  int dct_y_offset, dct_x_offset;
500  int qscale, i, act;
501  int interlaced_mb = 0;
502 
503  if (ctx->mbaff) {
504  interlaced_mb = get_bits1(&row->gb);
505  qscale = get_bits(&row->gb, 10);
506  } else {
507  qscale = get_bits(&row->gb, 11);
508  }
509  act = get_bits1(&row->gb);
510  if (act) {
511  if (!ctx->act) {
512  static int act_warned;
513  if (!act_warned) {
514  act_warned = 1;
515  av_log(ctx->avctx, AV_LOG_ERROR,
516  "ACT flag set, in violation of frame header.\n");
517  }
518  } else if (row->format == -1) {
519  row->format = act;
520  } else if (row->format != act) {
521  row->format = 2; // Variable
522  }
523  }
524 
525  if (qscale != row->last_qscale) {
526  for (i = 0; i < 64; i++) {
527  row->luma_scale[i] = qscale * ctx->cid_table->luma_weight[i];
528  row->chroma_scale[i] = qscale * ctx->cid_table->chroma_weight[i];
529  }
530  row->last_qscale = qscale;
531  }
532 
533  for (i = 0; i < 8 + 4 * ctx->is_444; i++) {
534  if (ctx->decode_dct_block(ctx, row, i) < 0)
535  return AVERROR_INVALIDDATA;
536  }
537 
538  if (frame->interlaced_frame) {
539  dct_linesize_luma <<= 1;
540  dct_linesize_chroma <<= 1;
541  }
542 
543  dest_y = frame->data[0] + ((y * dct_linesize_luma) << 4) + (x << (4 + shift1));
544  dest_u = frame->data[1] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
545  dest_v = frame->data[2] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
546 
547  if (frame->interlaced_frame && ctx->cur_field) {
548  dest_y += frame->linesize[0];
549  dest_u += frame->linesize[1];
550  dest_v += frame->linesize[2];
551  }
552  if (interlaced_mb) {
553  dct_linesize_luma <<= 1;
554  dct_linesize_chroma <<= 1;
555  }
556 
557  dct_y_offset = interlaced_mb ? frame->linesize[0] : (dct_linesize_luma << 3);
558  dct_x_offset = 8 << shift1;
559  if (!ctx->is_444) {
560  ctx->idsp.idct_put(dest_y, dct_linesize_luma, row->blocks[0]);
561  ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, row->blocks[1]);
562  ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, row->blocks[4]);
563  ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, row->blocks[5]);
564 
565  if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) {
566  dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3);
567  ctx->idsp.idct_put(dest_u, dct_linesize_chroma, row->blocks[2]);
568  ctx->idsp.idct_put(dest_v, dct_linesize_chroma, row->blocks[3]);
569  ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, row->blocks[6]);
570  ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, row->blocks[7]);
571  }
572  } else {
573  ctx->idsp.idct_put(dest_y, dct_linesize_luma, row->blocks[0]);
574  ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, row->blocks[1]);
575  ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, row->blocks[6]);
576  ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, row->blocks[7]);
577 
578  if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) {
579  dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3);
580  ctx->idsp.idct_put(dest_u, dct_linesize_chroma, row->blocks[2]);
581  ctx->idsp.idct_put(dest_u + dct_x_offset, dct_linesize_chroma, row->blocks[3]);
582  ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, row->blocks[8]);
583  ctx->idsp.idct_put(dest_u + dct_y_offset + dct_x_offset, dct_linesize_chroma, row->blocks[9]);
584  ctx->idsp.idct_put(dest_v, dct_linesize_chroma, row->blocks[4]);
585  ctx->idsp.idct_put(dest_v + dct_x_offset, dct_linesize_chroma, row->blocks[5]);
586  ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, row->blocks[10]);
587  ctx->idsp.idct_put(dest_v + dct_y_offset + dct_x_offset, dct_linesize_chroma, row->blocks[11]);
588  }
589  }
590 
591  return 0;
592 }
593 
595  int rownb, int threadnb)
596 {
597  const DNXHDContext *ctx = avctx->priv_data;
598  uint32_t offset = ctx->mb_scan_index[rownb];
599  RowContext *row = ctx->rows + threadnb;
600  int x;
601 
602  row->last_dc[0] =
603  row->last_dc[1] =
604  row->last_dc[2] = 1 << (ctx->bit_depth + 2); // for levels +2^(bitdepth-1)
605  init_get_bits(&row->gb, ctx->buf + offset, (ctx->buf_size - offset) << 3);
606  for (x = 0; x < ctx->mb_width; x++) {
607  //START_TIMER;
608  int ret = dnxhd_decode_macroblock(ctx, row, data, x, rownb);
609  if (ret < 0) {
610  row->errors++;
611  return ret;
612  }
613  //STOP_TIMER("decode macroblock");
614  }
615 
616  return 0;
617 }
618 
620  int *got_frame, AVPacket *avpkt)
621 {
622  const uint8_t *buf = avpkt->data;
623  int buf_size = avpkt->size;
624  DNXHDContext *ctx = avctx->priv_data;
625  ThreadFrame frame = { .f = data };
626  AVFrame *picture = data;
627  int first_field = 1;
628  int ret, i;
629 
630  ff_dlog(avctx, "frame size %d\n", buf_size);
631 
632  for (i = 0; i < avctx->thread_count; i++)
633  ctx->rows[i].format = -1;
634 
635 decode_coding_unit:
636  if ((ret = dnxhd_decode_header(ctx, picture, buf, buf_size, first_field)) < 0)
637  return ret;
638 
639  if ((avctx->width || avctx->height) &&
640  (ctx->width != avctx->width || ctx->height != avctx->height)) {
641  av_log(avctx, AV_LOG_WARNING, "frame size changed: %dx%d -> %ux%u\n",
642  avctx->width, avctx->height, ctx->width, ctx->height);
643  first_field = 1;
644  }
645  if (avctx->pix_fmt != AV_PIX_FMT_NONE && avctx->pix_fmt != ctx->pix_fmt) {
646  av_log(avctx, AV_LOG_WARNING, "pix_fmt changed: %s -> %s\n",
648  first_field = 1;
649  }
650 
651  avctx->pix_fmt = ctx->pix_fmt;
652  ret = ff_set_dimensions(avctx, ctx->width, ctx->height);
653  if (ret < 0)
654  return ret;
655 
656  if (first_field) {
657  if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
658  return ret;
659  picture->pict_type = AV_PICTURE_TYPE_I;
660  picture->key_frame = 1;
661  }
662 
663  ctx->buf_size = buf_size - ctx->data_offset;
664  ctx->buf = buf + ctx->data_offset;
665  avctx->execute2(avctx, dnxhd_decode_row, picture, NULL, ctx->mb_height);
666 
667  if (first_field && picture->interlaced_frame) {
668  buf += ctx->cid_table->coding_unit_size;
669  buf_size -= ctx->cid_table->coding_unit_size;
670  first_field = 0;
671  goto decode_coding_unit;
672  }
673 
674  ret = 0;
675  for (i = 0; i < avctx->thread_count; i++) {
676  ret += ctx->rows[i].errors;
677  ctx->rows[i].errors = 0;
678  }
679 
680  if (ctx->act) {
681  static int act_warned;
682  int format = ctx->rows[0].format;
683  for (i = 1; i < avctx->thread_count; i++) {
684  if (ctx->rows[i].format != format &&
685  ctx->rows[i].format != -1 /* not run */) {
686  format = 2;
687  break;
688  }
689  }
690  switch (format) {
691  case -1:
692  case 2:
693  if (!act_warned) {
694  act_warned = 1;
695  av_log(ctx->avctx, AV_LOG_ERROR,
696  "Unsupported: variable ACT flag.\n");
697  }
698  break;
699  case 0:
700  ctx->pix_fmt = ctx->bit_depth==10
702  break;
703  case 1:
704  ctx->pix_fmt = ctx->bit_depth==10
706  break;
707  }
708  }
709  avctx->pix_fmt = ctx->pix_fmt;
710  if (ret) {
711  av_log(ctx->avctx, AV_LOG_ERROR, "%d lines with errors\n", ret);
712  return AVERROR_INVALIDDATA;
713  }
714 
715  *got_frame = 1;
716  return avpkt->size;
717 }
718 
720 {
721  DNXHDContext *ctx = avctx->priv_data;
722 
723  ff_free_vlc(&ctx->ac_vlc);
724  ff_free_vlc(&ctx->dc_vlc);
725  ff_free_vlc(&ctx->run_vlc);
726 
727  av_freep(&ctx->rows);
728 
729  return 0;
730 }
731 
733  .name = "dnxhd",
734  .long_name = NULL_IF_CONFIG_SMALL("VC3/DNxHD"),
735  .type = AVMEDIA_TYPE_VIDEO,
736  .id = AV_CODEC_ID_DNXHD,
737  .priv_data_size = sizeof(DNXHDContext),
739  .close = dnxhd_decode_close,
741  .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS |
745 };
#define FF_PROFILE_DNXHD
Definition: avcodec.h:2874
also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
Definition: pixfmt.h:488
int cid
Definition: mxfenc.c:1948
static int dnxhd_decode_dct_block_8(const DNXHDContext *ctx, RowContext *row, int n)
Definition: dnxhddec.c:462
#define NULL
Definition: coverity.c:32
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static enum AVPixelFormat pix_fmt
This structure describes decoded (raw) audio or video data.
Definition: frame.h:226
const uint8_t * dc_bits
Definition: dnxhddata.h:52
IDCTDSPContext idsp
Definition: dnxhddec.c:65
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:1721
int64_t cid
compression id
Definition: dnxhddec.c:57
static int dnxhd_get_profile(int cid)
Definition: dnxhddec.c:171
misc image utilities
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:381
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
const uint8_t * luma_weight
Definition: dnxhddata.h:51
static int init_thread_copy(AVCodecContext *avctx)
Definition: tta.c:399
int(* decode_dct_block)(const struct DNXHDContext *ctx, RowContext *row, int n)
Definition: dnxhddec.c:74
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
Definition: utils.c:104
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
static av_cold int dnxhd_decode_init_thread_copy(AVCodecContext *avctx)
Definition: dnxhddec.c:156
void(* clear_block)(int16_t *block)
Definition: blockdsp.h:36
#define avpriv_request_sample(...)
Scantable.
Definition: idctdsp.h:31
int num
Numerator.
Definition: rational.h:59
int size
Definition: avcodec.h:1446
av_cold void ff_blockdsp_init(BlockDSPContext *c, AVCodecContext *avctx)
Definition: blockdsp.c:60
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:395
const CIDEntry ff_dnxhd_cid_table[]
Definition: dnxhddata.c:935
const uint16_t * run_codes
Definition: dnxhddata.h:55
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel...
Definition: avcodec.h:1912
RowContext * rows
Definition: dnxhddec.c:53
VLC run_vlc
Definition: dnxhddec.c:64
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1743
int errors
Definition: dnxhddec.c:46
uint8_t permutated[64]
Definition: idctdsp.h:33
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:2757
#define init_vlc(vlc, nb_bits, nb_codes, bits, bits_wrap, bits_size, codes, codes_wrap, codes_size, flags)
Definition: vlc.h:38
int profile
profile
Definition: avcodec.h:2859
VLC dc_vlc
Definition: dnxhddec.c:64
AVCodec.
Definition: avcodec.h:3424
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:42
int luma_scale[64]
Definition: dnxhddec.c:41
const uint8_t * buf
Definition: dnxhddec.c:55
static int16_t block[64]
Definition: dct.c:115
static av_cold int dnxhd_decode_close(AVCodecContext *avctx)
Definition: dnxhddec.c:719
uint8_t
#define av_cold
Definition: attributes.h:82
static int dnxhd_decode_dct_block_12(const DNXHDContext *ctx, RowContext *row, int n)
Definition: dnxhddec.c:480
const AVProfile ff_dnxhd_profiles[]
Definition: profiles.c:48
#define AV_RB32
Definition: intreadwrite.h:130
Multithreading support functions.
static AVFrame * frame
const char data[16]
Definition: mxf.c:91
#define DECLARE_ALIGNED(n, t, v)
Declare a variable that is aligned in memory.
Definition: mem.h:112
#define height
static av_always_inline int dnxhd_decode_dct_block(const DNXHDContext *ctx, RowContext *row, int n, int index_bits, int level_bias, int level_shift, int dc_shift)
Definition: dnxhddec.c:357
uint8_t * data
Definition: avcodec.h:1445
int format
-1:not set yet 0:off=RGB 1:on=YUV 2:variable
Definition: dnxhddec.c:48
#define ff_dlog(a,...)
const uint8_t * run_bits
Definition: dnxhddata.h:56
bitstream reader API header.
int bit_depth
Definition: dnxhddec.c:68
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
#define DNXHD_VLC_BITS
Definition: dnxhddec.c:78
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:373
unsigned int coding_unit_size
Definition: dnxhddata.h:46
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
Definition: rational.c:35
#define DNXHD_DC_VLC_BITS
Definition: dnxhddec.c:79
#define AV_PIX_FMT_YUV422P12
Definition: pixfmt.h:384
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:870
high precision timer, useful to profile code
#define FFALIGN(x, a)
Definition: macros.h:48
enum AVPixelFormat pix_fmt
Definition: dnxhddec.c:59
#define av_log(a,...)
static int first_field(const struct video_data *s)
Definition: v4l2.c:230
VLC ac_vlc
Definition: dnxhddec.c:64
const uint8_t * ac_bits
Definition: dnxhddata.h:54
const uint8_t * ac_info
Definition: dnxhddata.h:54
const uint16_t * ac_codes
Definition: dnxhddata.h:53
#define UPDATE_CACHE(name, gb)
Definition: get_bits.h:178
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:258
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int ff_dnxhd_get_cid_table(int cid)
Definition: dnxhddata.c:1078
unsigned int width
Definition: dnxhddata.h:44
static const int shift1[6]
Definition: dxa.c:50
static int dnxhd_decode_row(AVCodecContext *avctx, void *data, int rownb, int threadnb)
Definition: dnxhddec.c:594
#define AV_RB16
Definition: intreadwrite.h:53
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1613
unsigned int height
Definition: dnxhddec.c:58
const uint8_t * dc_codes
Definition: dnxhddata.h:52
const char * name
Name of the codec implementation.
Definition: avcodec.h:3431
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:382
#define FF_PROFILE_DNXHR_LB
Definition: avcodec.h:2875
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
#define CLOSE_READER(name, gb)
Definition: get_bits.h:149
static int dnxhd_decode_dct_block_10_444(const DNXHDContext *ctx, RowContext *row, int n)
Definition: dnxhddec.c:474
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:1024
static av_always_inline uint64_t ff_dnxhd_parse_header_prefix(const uint8_t *buf)
Definition: dnxhddata.h:86
Definition: vlc.h:26
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
const uint8_t * chroma_weight
Definition: dnxhddata.h:51
#define SKIP_BITS(name, gb, num)
Definition: get_bits.h:193
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:227
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:309
int width
picture width / height.
Definition: avcodec.h:1706
#define NEG_USR32(a, s)
Definition: mathops.h:166
static void decode_dct_block(RangeCoder *c, DCTBlockCoder *bc, uint8_t *dst, ptrdiff_t stride, int block_size, int *block, int mb_x, int mb_y)
Definition: mss3.c:565
const uint8_t * run
Definition: dnxhddata.h:56
static void bit_depth(AudioStatsContext *s, uint64_t mask, uint64_t imask, AVRational *depth)
Definition: af_astats.c:155
AVFormatContext * ctx
Definition: movenc.c:48
#define LAST_SKIP_BITS(name, gb, num)
Definition: get_bits.h:199
ScanTable scantable
Definition: dnxhddec.c:66
int n
Definition: avisynth_c.h:684
unsigned int mb_width
Definition: dnxhddec.c:60
#define GET_VLC(code, name, gb, table, bits, max_depth)
If the vlc code is invalid and max_depth=1, then no bits will be removed.
Definition: get_bits.h:671
uint8_t idct_permutation[64]
IDCT input permutation.
Definition: idctdsp.h:96
#define FF_PROFILE_DNXHR_HQ
Definition: avcodec.h:2877
void(* idct_put)(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
block -> idct -> clip to unsigned 8 bit -> dest.
Definition: idctdsp.h:72
if(ret< 0)
Definition: vf_mcdeint.c:279
static void error(const char *err)
static int dnxhd_decode_macroblock(const DNXHDContext *ctx, RowContext *row, AVFrame *frame, int x, int y)
Definition: dnxhddec.c:492
#define SHOW_UBITS(name, gb, num)
Definition: get_bits.h:211
#define FF_ARRAY_ELEMS(a)
int thread_count
thread count is used to decide how many independent tasks should be passed to execute() ...
Definition: avcodec.h:2785
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:1028
int bit_depth
Definition: dnxhddata.h:49
int(* execute2)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count)
The codec may call this to execute several independent things.
Definition: avcodec.h:2845
unsigned int width
Definition: dnxhddec.c:58
Libavcodec external API header.
int last_qscale
Definition: dnxhddec.c:45
int16_t blocks[12][64]
Definition: dnxhddec.c:40
int cur_field
current interlaced field
Definition: dnxhddec.c:63
unsigned int mb_height
Definition: dnxhddec.c:60
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:257
int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
Wrapper around get_buffer() for frame-multithreaded codecs.
static int dnxhd_decode_dct_block_10(const DNXHDContext *ctx, RowContext *row, int n)
Definition: dnxhddec.c:468
main external API structure.
Definition: avcodec.h:1533
#define OPEN_READER(name, gb)
Definition: get_bits.h:138
void * buf
Definition: avisynth_c.h:690
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:487
int coded_height
Definition: avcodec.h:1721
int eob_index
Definition: dnxhddata.h:50
int index
Definition: gxfenc.c:89
int chroma_scale[64]
Definition: dnxhddec.c:42
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:2157
static av_always_inline uint64_t ff_dnxhd_check_header_prefix_hr(uint64_t prefix)
Definition: dnxhddata.h:67
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:615
#define GET_CACHE(name, gb)
Definition: get_bits.h:215
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:98
#define FF_PROFILE_DNXHR_SQ
Definition: avcodec.h:2876
int is_444
Definition: dnxhddec.c:69
#define AV_PIX_FMT_GBRP12
Definition: pixfmt.h:396
#define SIZE_SPECIFIER
Definition: internal.h:264
#define flags(name, subs,...)
Definition: cbs_av1.c:610
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:380
#define AV_PIX_FMT_YUV444P12
Definition: pixfmt.h:386
static int dnxhd_init_vlc(DNXHDContext *ctx, uint32_t cid, int bitdepth)
Definition: dnxhddec.c:112
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:240
uint8_t level
Definition: svq3.c:207
uint32_t mb_scan_index[512]
Definition: dnxhddec.c:61
#define DNXHD_VARIABLE
Indicate that a CIDEntry value must be read in the bitstream.
Definition: dnxhddata.h:40
#define SHOW_SBITS(name, gb, num)
Definition: get_bits.h:212
int
#define FF_PROFILE_DNXHR_HQX
Definition: avcodec.h:2878
GetBitContext gb
Definition: dnxhddec.c:43
common internal api header.
int data_offset
Definition: dnxhddec.c:62
int den
Denominator.
Definition: rational.h:60
#define FF_PROFILE_DNXHR_444
Definition: avcodec.h:2879
int buf_size
Definition: dnxhddec.c:56
void * priv_data
Definition: avcodec.h:1560
av_cold void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable)
Definition: idctdsp.c:29
av_cold void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx)
Definition: idctdsp.c:238
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:378
static int dnxhd_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: dnxhddec.c:619
int len
VLC_TYPE(* table)[2]
code, bits
Definition: vlc.h:28
AVCodecContext * avctx
Definition: dnxhddec.c:52
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:304
BlockDSPContext bdsp
Definition: dnxhddec.c:54
AVCodec ff_dnxhd_decoder
Definition: dnxhddec.c:732
const CIDEntry * cid_table
Definition: dnxhddec.c:67
FILE * out
Definition: movenc.c:54
#define av_freep(p)
#define av_always_inline
Definition: attributes.h:39
int cid
Definition: dnxhddata.h:43
static int dnxhd_decode_header(DNXHDContext *ctx, AVFrame *frame, const uint8_t *buf, int buf_size, int first_field)
Definition: dnxhddec.c:188
const char * av_get_pix_fmt_name(enum AVPixelFormat pix_fmt)
Return the short name for a pixel format, NULL in case pix_fmt is unknown.
Definition: pixdesc.c:2362
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
This structure stores compressed data.
Definition: avcodec.h:1422
void ff_free_vlc(VLC *vlc)
Definition: bitstream.c:359
int last_dc[3]
Definition: dnxhddec.c:44
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:968
static int dnxhd_decode_dct_block_12_444(const DNXHDContext *ctx, RowContext *row, int n)
Definition: dnxhddec.c:486
static av_cold int dnxhd_decode_init(AVCodecContext *avctx)
Definition: dnxhddec.c:92
void * av_mallocz_array(size_t nmemb, size_t size)
Allocate a memory block for an array with av_mallocz().
Definition: mem.c:191