FFmpeg: libavcodec/dnxhddec.c Source File

FFmpeg
dnxhddec.c
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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 "thread.h"
37 
38  typedef struct RowContext {
39   DECLARE_ALIGNED(16, int16_t, blocks)[12][64];
40   int luma_scale[64];
41   int chroma_scale[64];
42   GetBitContext gb;
43   int last_dc[3];
44   int last_qscale;
45   int errors;
46  /** -1:not set yet 0:off=RGB 1:on=YUV 2:variable */
47   int format;
48 } RowContext;
49 
50  typedef struct DNXHDContext {
51   AVCodecContext *avctx;
52   RowContext *rows;
53   BlockDSPContext bdsp;
54   const uint8_t* buf;
55   int buf_size;
56   int64_t cid; ///< compression id
57   unsigned int width, height;
58   enum AVPixelFormat pix_fmt;
59   unsigned int mb_width, mb_height;
60   uint32_t mb_scan_index[256];
61   int data_offset; // End of mb_scan_index, where macroblocks start
62   int cur_field; ///< current interlaced field
63   VLC ac_vlc, dc_vlc, run_vlc;
64   IDCTDSPContext idsp;
65   ScanTable scantable;
66   const CIDEntry *cid_table;
67   int bit_depth; // 8, 10, 12 or 0 if not initialized at all.
68   int is_444;
69   int mbaff;
70   int act;
71   int (*decode_dct_block)(const struct DNXHDContext *ctx,
72  RowContext *row, int n);
73 } DNXHDContext;
74 
75  #define DNXHD_VLC_BITS 9
76  #define DNXHD_DC_VLC_BITS 7
77 
78 static int dnxhd_decode_dct_block_8(const DNXHDContext *ctx,
79  RowContext *row, int n);
80 static int dnxhd_decode_dct_block_10(const DNXHDContext *ctx,
81  RowContext *row, int n);
82 static int dnxhd_decode_dct_block_10_444(const DNXHDContext *ctx,
83  RowContext *row, int n);
84 static int dnxhd_decode_dct_block_12(const DNXHDContext *ctx,
85  RowContext *row, int n);
86 static int dnxhd_decode_dct_block_12_444(const DNXHDContext *ctx,
87  RowContext *row, int n);
88 
89  static av_cold int dnxhd_decode_init(AVCodecContext *avctx)
90 {
91  DNXHDContext *ctx = avctx->priv_data;
92 
93  ctx->avctx = avctx;
94  ctx->cid = -1;
95  avctx->colorspace = AVCOL_SPC_BT709;
96 
97  avctx->coded_width = FFALIGN(avctx->width, 16);
98  avctx->coded_height = FFALIGN(avctx->height, 16);
99 
100  ctx->rows = av_mallocz_array(avctx->thread_count, sizeof(RowContext));
101  if (!ctx->rows)
102  return AVERROR(ENOMEM);
103 
104  return 0;
105 }
106 
107  static int dnxhd_init_vlc(DNXHDContext *ctx, uint32_t cid, int bitdepth)
108 {
109  if (cid != ctx->cid) {
110  int index;
111 
112  if ((index = ff_dnxhd_get_cid_table(cid)) < 0) {
113  av_log(ctx->avctx, AV_LOG_ERROR, "unsupported cid %d\n", cid);
114  return AVERROR(ENOSYS);
115  }
116  if (ff_dnxhd_cid_table[index].bit_depth != bitdepth &&
117  ff_dnxhd_cid_table[index].bit_depth != DNXHD_VARIABLE) {
118  av_log(ctx->avctx, AV_LOG_ERROR, "bit depth mismatches %d %d\n", ff_dnxhd_cid_table[index].bit_depth, bitdepth);
119  return AVERROR_INVALIDDATA;
120  }
121  if (bitdepth > 10) {
122  avpriv_request_sample(ctx->avctx, "DNXHR 12-bit");
123  if (ctx->avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL)
124  return AVERROR_PATCHWELCOME;
125  }
126  ctx->cid_table = &ff_dnxhd_cid_table[index];
127  av_log(ctx->avctx, AV_LOG_VERBOSE, "Profile cid %d.\n", cid);
128 
129  ff_free_vlc(&ctx->ac_vlc);
130  ff_free_vlc(&ctx->dc_vlc);
131  ff_free_vlc(&ctx->run_vlc);
132 
133  init_vlc(&ctx->ac_vlc, DNXHD_VLC_BITS, 257,
134  ctx->cid_table->ac_bits, 1, 1,
135  ctx->cid_table->ac_codes, 2, 2, 0);
136  init_vlc(&ctx->dc_vlc, DNXHD_DC_VLC_BITS, bitdepth + 4,
137  ctx->cid_table->dc_bits, 1, 1,
138  ctx->cid_table->dc_codes, 1, 1, 0);
139  init_vlc(&ctx->run_vlc, DNXHD_VLC_BITS, 62,
140  ctx->cid_table->run_bits, 1, 1,
141  ctx->cid_table->run_codes, 2, 2, 0);
142 
143  ctx->cid = cid;
144  }
145  return 0;
146 }
147 
148  static av_cold int dnxhd_decode_init_thread_copy(AVCodecContext *avctx)
149 {
150  DNXHDContext *ctx = avctx->priv_data;
151 
152  // make sure VLC tables will be loaded when cid is parsed
153  ctx->cid = -1;
154 
155  ctx->rows = av_mallocz_array(avctx->thread_count, sizeof(RowContext));
156  if (!ctx->rows)
157  return AVERROR(ENOMEM);
158 
159  return 0;
160 }
161 
162  static int dnxhd_decode_header(DNXHDContext *ctx, AVFrame *frame,
163  const uint8_t *buf, int buf_size,
164  int first_field)
165 {
166  int i, cid, ret;
167  int old_bit_depth = ctx->bit_depth, bitdepth;
168  uint64_t header_prefix;
169  if (buf_size < 0x280) {
170  av_log(ctx->avctx, AV_LOG_ERROR,
171  "buffer too small (%d < 640).\n", buf_size);
172  return AVERROR_INVALIDDATA;
173  }
174 
175  header_prefix = avpriv_dnxhd_parse_header_prefix(buf);
176  if (header_prefix == 0) {
177  av_log(ctx->avctx, AV_LOG_ERROR,
178  "unknown header 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X\n",
179  buf[0], buf[1], buf[2], buf[3], buf[4]);
180  return AVERROR_INVALIDDATA;
181  }
182  if (buf[5] & 2) { /* interlaced */
183  ctx->cur_field = buf[5] & 1;
184  frame->interlaced_frame = 1;
185  frame->top_field_first = first_field ^ ctx->cur_field;
186  av_log(ctx->avctx, AV_LOG_DEBUG,
187  "interlaced %d, cur field %d\n", buf[5] & 3, ctx->cur_field);
188  } else {
189  ctx->cur_field = 0;
190  }
191  ctx->mbaff = (buf[0x6] >> 5) & 1;
192 
193  ctx->height = AV_RB16(buf + 0x18);
194  ctx->width = AV_RB16(buf + 0x1a);
195 
196  switch(buf[0x21] >> 5) {
197  case 1: bitdepth = 8; break;
198  case 2: bitdepth = 10; break;
199  case 3: bitdepth = 12; break;
200  default:
201  av_log(ctx->avctx, AV_LOG_ERROR,
202  "Unknown bitdepth indicator (%d)\n", buf[0x21] >> 5);
203  return AVERROR_INVALIDDATA;
204  }
205 
206  cid = AV_RB32(buf + 0x28);
207  if ((ret = dnxhd_init_vlc(ctx, cid, bitdepth)) < 0)
208  return ret;
209  if (ctx->mbaff && ctx->cid_table->cid != 1260)
210  av_log(ctx->avctx, AV_LOG_WARNING,
211  "Adaptive MB interlace flag in an unsupported profile.\n");
212 
213  ctx->act = buf[0x2C] & 7;
214  if (ctx->act && ctx->cid_table->cid != 1256 && ctx->cid_table->cid != 1270)
215  av_log(ctx->avctx, AV_LOG_WARNING,
216  "Adaptive color transform in an unsupported profile.\n");
217 
218  ctx->is_444 = (buf[0x2C] >> 6) & 1;
219  if (ctx->is_444) {
220  if (bitdepth == 8) {
221  avpriv_request_sample(ctx->avctx, "4:4:4 8 bits\n");
222  return AVERROR_INVALIDDATA;
223  } else if (bitdepth == 10) {
224  ctx->decode_dct_block = dnxhd_decode_dct_block_10_444;
225  ctx->pix_fmt = ctx->act ? AV_PIX_FMT_YUV444P10
226  : AV_PIX_FMT_GBRP10;
227  } else {
228  ctx->decode_dct_block = dnxhd_decode_dct_block_12_444;
229  ctx->pix_fmt = ctx->act ? AV_PIX_FMT_YUV444P12
230  : AV_PIX_FMT_GBRP12;
231  }
232  } else if (bitdepth == 12) {
233  ctx->decode_dct_block = dnxhd_decode_dct_block_12;
234  ctx->pix_fmt = AV_PIX_FMT_YUV422P12;
235  } else if (bitdepth == 10) {
236  ctx->decode_dct_block = dnxhd_decode_dct_block_10;
237  ctx->pix_fmt = AV_PIX_FMT_YUV422P10;
238  } else {
239  ctx->decode_dct_block = dnxhd_decode_dct_block_8;
240  ctx->pix_fmt = AV_PIX_FMT_YUV422P;
241  }
242 
243  ctx->avctx->bits_per_raw_sample = ctx->bit_depth = bitdepth;
244  if (ctx->bit_depth != old_bit_depth) {
245  ff_blockdsp_init(&ctx->bdsp, ctx->avctx);
246  ff_idctdsp_init(&ctx->idsp, ctx->avctx);
247  ff_init_scantable(ctx->idsp.idct_permutation, &ctx->scantable,
248  ff_zigzag_direct);
249  }
250 
251  // make sure profile size constraints are respected
252  // DNx100 allows 1920->1440 and 1280->960 subsampling
253  if (ctx->width != ctx->cid_table->width &&
254  ctx->cid_table->width != DNXHD_VARIABLE) {
255  av_reduce(&ctx->avctx->sample_aspect_ratio.num,
256  &ctx->avctx->sample_aspect_ratio.den,
257  ctx->width, ctx->cid_table->width, 255);
258  ctx->width = ctx->cid_table->width;
259  }
260 
261  if (buf_size < ctx->cid_table->coding_unit_size) {
262  av_log(ctx->avctx, AV_LOG_ERROR, "incorrect frame size (%d < %d).\n",
263  buf_size, ctx->cid_table->coding_unit_size);
264  return AVERROR_INVALIDDATA;
265  }
266 
267  ctx->mb_width = (ctx->width + 15)>> 4;
268  ctx->mb_height = buf[0x16d];
269 
270  if ((ctx->height + 15) >> 4 == ctx->mb_height && frame->interlaced_frame)
271  ctx->height <<= 1;
272 
273  av_log(ctx->avctx, AV_LOG_VERBOSE, "%dx%d, 4:%s %d bits, MBAFF=%d ACT=%d\n",
274  ctx->width, ctx->height, ctx->is_444 ? "4:4" : "2:2",
275  ctx->bit_depth, ctx->mbaff, ctx->act);
276 
277  // Newer format supports variable mb_scan_index sizes
278  if (header_prefix == DNXHD_HEADER_HR2) {
279  ctx->data_offset = 0x170 + (ctx->mb_height << 2);
280  } else {
281  if (ctx->mb_height > 68 ||
282  (ctx->mb_height << frame->interlaced_frame) > (ctx->height + 15) >> 4) {
283  av_log(ctx->avctx, AV_LOG_ERROR,
284  "mb height too big: %d\n", ctx->mb_height);
285  return AVERROR_INVALIDDATA;
286  }
287  ctx->data_offset = 0x280;
288  }
289 
290  if (buf_size < ctx->data_offset) {
291  av_log(ctx->avctx, AV_LOG_ERROR,
292  "buffer too small (%d < %d).\n", buf_size, ctx->data_offset);
293  return AVERROR_INVALIDDATA;
294  }
295 
296  av_assert0((unsigned)ctx->mb_height <= FF_ARRAY_ELEMS(ctx->mb_scan_index));
297 
298  for (i = 0; i < ctx->mb_height; i++) {
299  ctx->mb_scan_index[i] = AV_RB32(buf + 0x170 + (i << 2));
300  ff_dlog(ctx->avctx, "mb scan index %d, pos %d: %u\n", i, 0x170 + (i << 2), ctx->mb_scan_index[i]);
301  if (buf_size - ctx->data_offset < ctx->mb_scan_index[i]) {
302  av_log(ctx->avctx, AV_LOG_ERROR,
303  "invalid mb scan index (%u vs %u).\n",
304  ctx->mb_scan_index[i], buf_size - ctx->data_offset);
305  return AVERROR_INVALIDDATA;
306  }
307  }
308 
309  return 0;
310 }
311 
312  static av_always_inline int dnxhd_decode_dct_block(const DNXHDContext *ctx,
313  RowContext *row,
314  int n,
315  int index_bits,
316  int level_bias,
317  int level_shift,
318  int dc_shift)
319 {
320  int i, j, index1, index2, len, flags;
321  int level, component, sign;
322  const int *scale;
323  const uint8_t *weight_matrix;
324  const uint8_t *ac_info = ctx->cid_table->ac_info;
325  int16_t *block = row->blocks[n];
326  const int eob_index = ctx->cid_table->eob_index;
327  int ret = 0;
328  OPEN_READER(bs, &row->gb);
329 
330  ctx->bdsp.clear_block(block);
331 
332  if (!ctx->is_444) {
333  if (n & 2) {
334  component = 1 + (n & 1);
335  scale = row->chroma_scale;
336  weight_matrix = ctx->cid_table->chroma_weight;
337  } else {
338  component = 0;
339  scale = row->luma_scale;
340  weight_matrix = ctx->cid_table->luma_weight;
341  }
342  } else {
343  component = (n >> 1) % 3;
344  if (component) {
345  scale = row->chroma_scale;
346  weight_matrix = ctx->cid_table->chroma_weight;
347  } else {
348  scale = row->luma_scale;
349  weight_matrix = ctx->cid_table->luma_weight;
350  }
351  }
352 
353  UPDATE_CACHE(bs, &row->gb);
354  GET_VLC(len, bs, &row->gb, ctx->dc_vlc.table, DNXHD_DC_VLC_BITS, 1);
355  if (len) {
356  level = GET_CACHE(bs, &row->gb);
357  LAST_SKIP_BITS(bs, &row->gb, len);
358  sign = ~level >> 31;
359  level = (NEG_USR32(sign ^ level, len) ^ sign) - sign;
360  row->last_dc[component] += level * (1 << dc_shift);
361  }
362  block[0] = row->last_dc[component];
363 
364  i = 0;
365 
366  UPDATE_CACHE(bs, &row->gb);
367  GET_VLC(index1, bs, &row->gb, ctx->ac_vlc.table,
368  DNXHD_VLC_BITS, 2);
369 
370  while (index1 != eob_index) {
371  level = ac_info[2*index1+0];
372  flags = ac_info[2*index1+1];
373 
374  sign = SHOW_SBITS(bs, &row->gb, 1);
375  SKIP_BITS(bs, &row->gb, 1);
376 
377  if (flags & 1) {
378  level += SHOW_UBITS(bs, &row->gb, index_bits) << 7;
379  SKIP_BITS(bs, &row->gb, index_bits);
380  }
381 
382  if (flags & 2) {
383  UPDATE_CACHE(bs, &row->gb);
384  GET_VLC(index2, bs, &row->gb, ctx->run_vlc.table,
385  DNXHD_VLC_BITS, 2);
386  i += ctx->cid_table->run[index2];
387  }
388 
389  if (++i > 63) {
390  av_log(ctx->avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", n, i);
391  ret = -1;
392  break;
393  }
394 
395  j = ctx->scantable.permutated[i];
396  level *= scale[i];
397  level += scale[i] >> 1;
398  if (level_bias < 32 || weight_matrix[i] != level_bias)
399  level += level_bias; // 1<<(level_shift-1)
400  level >>= level_shift;
401 
402  block[j] = (level ^ sign) - sign;
403 
404  UPDATE_CACHE(bs, &row->gb);
405  GET_VLC(index1, bs, &row->gb, ctx->ac_vlc.table,
406  DNXHD_VLC_BITS, 2);
407  }
408 
409  CLOSE_READER(bs, &row->gb);
410  return ret;
411 }
412 
413  static int dnxhd_decode_dct_block_8(const DNXHDContext *ctx,
414  RowContext *row, int n)
415 {
416  return dnxhd_decode_dct_block(ctx, row, n, 4, 32, 6, 0);
417 }
418 
419  static int dnxhd_decode_dct_block_10(const DNXHDContext *ctx,
420  RowContext *row, int n)
421 {
422  return dnxhd_decode_dct_block(ctx, row, n, 6, 8, 4, 0);
423 }
424 
425  static int dnxhd_decode_dct_block_10_444(const DNXHDContext *ctx,
426  RowContext *row, int n)
427 {
428  return dnxhd_decode_dct_block(ctx, row, n, 6, 32, 6, 0);
429 }
430 
431  static int dnxhd_decode_dct_block_12(const DNXHDContext *ctx,
432  RowContext *row, int n)
433 {
434  return dnxhd_decode_dct_block(ctx, row, n, 6, 8, 4, 2);
435 }
436 
437  static int dnxhd_decode_dct_block_12_444(const DNXHDContext *ctx,
438  RowContext *row, int n)
439 {
440  return dnxhd_decode_dct_block(ctx, row, n, 6, 32, 4, 2);
441 }
442 
443  static int dnxhd_decode_macroblock(const DNXHDContext *ctx, RowContext *row,
444  AVFrame *frame, int x, int y)
445 {
446  int shift1 = ctx->bit_depth >= 10;
447  int dct_linesize_luma = frame->linesize[0];
448  int dct_linesize_chroma = frame->linesize[1];
449  uint8_t *dest_y, *dest_u, *dest_v;
450  int dct_y_offset, dct_x_offset;
451  int qscale, i, act;
452  int interlaced_mb = 0;
453 
454  if (ctx->mbaff) {
455  interlaced_mb = get_bits1(&row->gb);
456  qscale = get_bits(&row->gb, 10);
457  } else {
458  qscale = get_bits(&row->gb, 11);
459  }
460  act = get_bits1(&row->gb);
461  if (act) {
462  if (!ctx->act) {
463  static int act_warned;
464  if (!act_warned) {
465  act_warned = 1;
466  av_log(ctx->avctx, AV_LOG_ERROR,
467  "ACT flag set, in violation of frame header.\n");
468  }
469  } else if (row->format == -1) {
470  row->format = act;
471  } else if (row->format != act) {
472  row->format = 2; // Variable
473  }
474  }
475 
476  if (qscale != row->last_qscale) {
477  for (i = 0; i < 64; i++) {
478  row->luma_scale[i] = qscale * ctx->cid_table->luma_weight[i];
479  row->chroma_scale[i] = qscale * ctx->cid_table->chroma_weight[i];
480  }
481  row->last_qscale = qscale;
482  }
483 
484  for (i = 0; i < 8 + 4 * ctx->is_444; i++) {
485  if (ctx->decode_dct_block(ctx, row, i) < 0)
486  return AVERROR_INVALIDDATA;
487  }
488 
489  if (frame->interlaced_frame) {
490  dct_linesize_luma <<= 1;
491  dct_linesize_chroma <<= 1;
492  }
493 
494  dest_y = frame->data[0] + ((y * dct_linesize_luma) << 4) + (x << (4 + shift1));
495  dest_u = frame->data[1] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
496  dest_v = frame->data[2] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
497 
498  if (frame->interlaced_frame && ctx->cur_field) {
499  dest_y += frame->linesize[0];
500  dest_u += frame->linesize[1];
501  dest_v += frame->linesize[2];
502  }
503  if (interlaced_mb) {
504  dct_linesize_luma <<= 1;
505  dct_linesize_chroma <<= 1;
506  }
507 
508  dct_y_offset = interlaced_mb ? frame->linesize[0] : (dct_linesize_luma << 3);
509  dct_x_offset = 8 << shift1;
510  if (!ctx->is_444) {
511  ctx->idsp.idct_put(dest_y, dct_linesize_luma, row->blocks[0]);
512  ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, row->blocks[1]);
513  ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, row->blocks[4]);
514  ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, row->blocks[5]);
515 
516  if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) {
517  dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3);
518  ctx->idsp.idct_put(dest_u, dct_linesize_chroma, row->blocks[2]);
519  ctx->idsp.idct_put(dest_v, dct_linesize_chroma, row->blocks[3]);
520  ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, row->blocks[6]);
521  ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, row->blocks[7]);
522  }
523  } else {
524  ctx->idsp.idct_put(dest_y, dct_linesize_luma, row->blocks[0]);
525  ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, row->blocks[1]);
526  ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, row->blocks[6]);
527  ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, row->blocks[7]);
528 
529  if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) {
530  dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3);
531  ctx->idsp.idct_put(dest_u, dct_linesize_chroma, row->blocks[2]);
532  ctx->idsp.idct_put(dest_u + dct_x_offset, dct_linesize_chroma, row->blocks[3]);
533  ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, row->blocks[8]);
534  ctx->idsp.idct_put(dest_u + dct_y_offset + dct_x_offset, dct_linesize_chroma, row->blocks[9]);
535  ctx->idsp.idct_put(dest_v, dct_linesize_chroma, row->blocks[4]);
536  ctx->idsp.idct_put(dest_v + dct_x_offset, dct_linesize_chroma, row->blocks[5]);
537  ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, row->blocks[10]);
538  ctx->idsp.idct_put(dest_v + dct_y_offset + dct_x_offset, dct_linesize_chroma, row->blocks[11]);
539  }
540  }
541 
542  return 0;
543 }
544 
545  static int dnxhd_decode_row(AVCodecContext *avctx, void *data,
546  int rownb, int threadnb)
547 {
548  const DNXHDContext *ctx = avctx->priv_data;
549  uint32_t offset = ctx->mb_scan_index[rownb];
550  RowContext *row = ctx->rows + threadnb;
551  int x;
552 
553  row->last_dc[0] =
554  row->last_dc[1] =
555  row->last_dc[2] = 1 << (ctx->bit_depth + 2); // for levels +2^(bitdepth-1)
556  init_get_bits(&row->gb, ctx->buf + offset, (ctx->buf_size - offset) << 3);
557  for (x = 0; x < ctx->mb_width; x++) {
558  //START_TIMER;
559  int ret = dnxhd_decode_macroblock(ctx, row, data, x, rownb);
560  if (ret < 0) {
561  row->errors++;
562  return ret;
563  }
564  //STOP_TIMER("decode macroblock");
565  }
566 
567  return 0;
568 }
569 
570  static int dnxhd_decode_frame(AVCodecContext *avctx, void *data,
571  int *got_frame, AVPacket *avpkt)
572 {
573  const uint8_t *buf = avpkt->data;
574  int buf_size = avpkt->size;
575  DNXHDContext *ctx = avctx->priv_data;
576  ThreadFrame frame = { .f = data };
577  AVFrame *picture = data;
578  int first_field = 1;
579  int ret, i;
580 
581  ff_dlog(avctx, "frame size %d\n", buf_size);
582 
583  for (i = 0; i < avctx->thread_count; i++)
584  ctx->rows[i].format = -1;
585 
586 decode_coding_unit:
587  if ((ret = dnxhd_decode_header(ctx, picture, buf, buf_size, first_field)) < 0)
588  return ret;
589 
590  if ((avctx->width || avctx->height) &&
591  (ctx->width != avctx->width || ctx->height != avctx->height)) {
592  av_log(avctx, AV_LOG_WARNING, "frame size changed: %dx%d -> %dx%d\n",
593  avctx->width, avctx->height, ctx->width, ctx->height);
594  first_field = 1;
595  }
596  if (avctx->pix_fmt != AV_PIX_FMT_NONE && avctx->pix_fmt != ctx->pix_fmt) {
597  av_log(avctx, AV_LOG_WARNING, "pix_fmt changed: %s -> %s\n",
598  av_get_pix_fmt_name(avctx->pix_fmt), av_get_pix_fmt_name(ctx->pix_fmt));
599  first_field = 1;
600  }
601 
602  avctx->pix_fmt = ctx->pix_fmt;
603  ret = ff_set_dimensions(avctx, ctx->width, ctx->height);
604  if (ret < 0)
605  return ret;
606 
607  if (first_field) {
608  if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
609  return ret;
610  picture->pict_type = AV_PICTURE_TYPE_I;
611  picture->key_frame = 1;
612  }
613 
614  ctx->buf_size = buf_size - ctx->data_offset;
615  ctx->buf = buf + ctx->data_offset;
616  avctx->execute2(avctx, dnxhd_decode_row, picture, NULL, ctx->mb_height);
617 
618  if (first_field && picture->interlaced_frame) {
619  buf += ctx->cid_table->coding_unit_size;
620  buf_size -= ctx->cid_table->coding_unit_size;
621  first_field = 0;
622  goto decode_coding_unit;
623  }
624 
625  ret = 0;
626  for (i = 0; i < avctx->thread_count; i++) {
627  ret += ctx->rows[i].errors;
628  ctx->rows[i].errors = 0;
629  }
630 
631  if (ctx->act) {
632  static int act_warned;
633  int format = ctx->rows[0].format;
634  for (i = 1; i < avctx->thread_count; i++) {
635  if (ctx->rows[i].format != format &&
636  ctx->rows[i].format != -1 /* not run */) {
637  format = 2;
638  break;
639  }
640  }
641  switch (format) {
642  case -1:
643  case 2:
644  if (!act_warned) {
645  act_warned = 1;
646  av_log(ctx->avctx, AV_LOG_ERROR,
647  "Unsupported: variable ACT flag.\n");
648  }
649  break;
650  case 0:
651  ctx->pix_fmt = ctx->bit_depth==10
652  ? AV_PIX_FMT_GBRP10 : AV_PIX_FMT_GBRP12;
653  break;
654  case 1:
655  ctx->pix_fmt = ctx->bit_depth==10
656  ? AV_PIX_FMT_YUV444P10 : AV_PIX_FMT_YUV444P12;
657  break;
658  }
659  }
660  avctx->pix_fmt = ctx->pix_fmt;
661  if (ret) {
662  av_log(ctx->avctx, AV_LOG_ERROR, "%d lines with errors\n", ret);
663  return AVERROR_INVALIDDATA;
664  }
665 
666  *got_frame = 1;
667  return avpkt->size;
668 }
669 
670  static av_cold int dnxhd_decode_close(AVCodecContext *avctx)
671 {
672  DNXHDContext *ctx = avctx->priv_data;
673 
674  ff_free_vlc(&ctx->ac_vlc);
675  ff_free_vlc(&ctx->dc_vlc);
676  ff_free_vlc(&ctx->run_vlc);
677 
678  av_freep(&ctx->rows);
679 
680  return 0;
681 }
682 
683  AVCodec ff_dnxhd_decoder = {
684  .name = "dnxhd",
685  .long_name = NULL_IF_CONFIG_SMALL("VC3/DNxHD"),
686  .type = AVMEDIA_TYPE_VIDEO,
687  .id = AV_CODEC_ID_DNXHD,
688  .priv_data_size = sizeof(DNXHDContext),
689  .init = dnxhd_decode_init,
690  .close = dnxhd_decode_close,
691  .decode = dnxhd_decode_frame,
692  .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS |
693  AV_CODEC_CAP_SLICE_THREADS,
694  .init_thread_copy = ONLY_IF_THREADS_ENABLED(dnxhd_decode_init_thread_copy),
695 };
AVCOL_SPC_BT709
also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
Definition: pixfmt.h:422
FF_COMPLIANCE_EXPERIMENTAL
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:2746
dnxhd_decode_dct_block_8
static int dnxhd_decode_dct_block_8(const DNXHDContext *ctx, RowContext *row, int n)
Definition: dnxhddec.c:413
NULL
#define NULL
Definition: coverity.c:32
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
AV_CODEC_ID_DNXHD
Definition: avcodec.h:206
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:181
CIDEntry::dc_bits
const uint8_t * dc_bits
Definition: dnxhddata.h:53
DNXHDContext::idsp
IDCTDSPContext idsp
Definition: dnxhddec.c:64
data
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
BlockDSPContext::clear_block
void(* clear_block)(int16_t *block)
Definition: blockdsp.h:35
AVCodecContext::coded_width
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:1726
ctx
AVFormatContext * ctx
Definition: movenc-test.c:48
DNXHDContext::cid
int64_t cid
compression id
Definition: dnxhddec.c:56
imgutils.h
misc image utilities
get_bits
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:260
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
CIDEntry::luma_weight
const uint8_t * luma_weight
Definition: dnxhddata.h:52
init_thread_copy
static int init_thread_copy(AVCodecContext *avctx)
Definition: tta.c:390
ff_set_dimensions
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:209
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
dnxhd_decode_init_thread_copy
static av_cold int dnxhd_decode_init_thread_copy(AVCodecContext *avctx)
Definition: dnxhddec.c:148
ScanTable
Scantable.
Definition: idctdsp.h:29
AVRational::num
int num
numerator
Definition: rational.h:44
AVPacket::size
int size
Definition: avcodec.h:1468
AV_PIX_FMT_GBRP10
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:346
ff_dnxhd_cid_table
const CIDEntry ff_dnxhd_cid_table[]
Definition: dnxhddata.c:934
CIDEntry::run_codes
const uint16_t * run_codes
Definition: dnxhddata.h:56
DECLARE_ALIGNED
#define DECLARE_ALIGNED(n, t, v)
Definition: mem.h:53
AVCodecContext::sample_aspect_ratio
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:1935
DNXHDContext::rows
RowContext * rows
Definition: dnxhddec.c:52
DNXHDContext::run_vlc
VLC run_vlc
Definition: dnxhddec.c:63
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1752
RowContext::errors
int errors
Definition: dnxhddec.c:45
ScanTable::permutated
uint8_t permutated[64]
Definition: idctdsp.h:31
AVCodecContext::bits_per_raw_sample
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:2924
AV_RB16
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
Definition: bytestream.h:87
DNXHDContext::dc_vlc
VLC dc_vlc
Definition: dnxhddec.c:63
AVCodec
AVCodec.
Definition: avcodec.h:3392
RowContext::luma_scale
int luma_scale[64]
Definition: dnxhddec.c:40
DNXHDContext::buf
const uint8_t * buf
Definition: dnxhddec.c:54
dnxhd_decode_close
static av_cold int dnxhd_decode_close(AVCodecContext *avctx)
Definition: dnxhddec.c:670
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
avpriv_request_sample
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
uint8_t
uint8_t
Definition: audio_convert.c:194
av_cold
#define av_cold
Definition: attributes.h:82
dnxhd_decode_dct_block_12
static int dnxhd_decode_dct_block_12(const DNXHDContext *ctx, RowContext *row, int n)
Definition: dnxhddec.c:431
thread.h
Multithreading support functions.
AV_RB32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
frame
static AVFrame * frame
Definition: demuxing_decoding.c:53
dnxhd_decode_dct_block
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:312
AVPacket::data
uint8_t * data
Definition: avcodec.h:1467
RowContext::format
int format
-1:not set yet 0:off=RGB 1:on=YUV 2:variable
Definition: dnxhddec.c:47
ff_dlog
#define ff_dlog(a,...)
Definition: tableprint_vlc.h:29
CIDEntry::run_bits
const uint8_t * run_bits
Definition: dnxhddata.h:57
get_bits.h
bitstream reader API header.
DNXHDContext::bit_depth
int bit_depth
Definition: dnxhddec.c:67
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
DNXHD_VLC_BITS
#define DNXHD_VLC_BITS
Definition: dnxhddec.c:75
AVFrame::interlaced_frame
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:312
CIDEntry::coding_unit_size
unsigned int coding_unit_size
Definition: dnxhddata.h:47
DNXHD_DC_VLC_BITS
#define DNXHD_DC_VLC_BITS
Definition: dnxhddec.c:76
AV_PIX_FMT_YUV422P12
#define AV_PIX_FMT_YUV422P12
Definition: pixfmt.h:335
AV_CODEC_FLAG_GRAY
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:762
timer.h
high precision timer, useful to profile code
FFALIGN
#define FFALIGN(x, a)
Definition: macros.h:48
DNXHDContext::pix_fmt
enum AVPixelFormat pix_fmt
Definition: dnxhddec.c:58
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
first_field
static int first_field(const struct video_data *s)
Definition: v4l2.c:228
DNXHDContext::ac_vlc
VLC ac_vlc
Definition: dnxhddec.c:63
CIDEntry::ac_bits
const uint8_t * ac_bits
Definition: dnxhddata.h:55
CIDEntry::ac_info
const uint8_t * ac_info
Definition: dnxhddata.h:55
CIDEntry::ac_codes
const uint16_t * ac_codes
Definition: dnxhddata.h:54
UPDATE_CACHE
#define UPDATE_CACHE(name, gb)
Definition: get_bits.h:173
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
ff_dnxhd_get_cid_table
int ff_dnxhd_get_cid_table(int cid)
Definition: dnxhddata.c:1081
CIDEntry::width
unsigned int width
Definition: dnxhddata.h:45
shift1
static const int shift1[6]
Definition: dxa.c:50
dnxhd_decode_row
static int dnxhd_decode_row(AVCodecContext *avctx, void *data, int rownb, int threadnb)
Definition: dnxhddec.c:545
avpriv_dnxhd_parse_header_prefix
uint64_t avpriv_dnxhd_parse_header_prefix(const uint8_t *buf)
Definition: dnxhddata.c:1106
AVERROR
#define AVERROR(e)
Definition: error.h:43
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
AVCodecContext::flags
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1627
DNXHDContext::height
unsigned int height
Definition: dnxhddec.c:57
CIDEntry::dc_codes
const uint8_t * dc_codes
Definition: dnxhddata.h:53
AVCodec::name
const char * name
Name of the codec implementation.
Definition: avcodec.h:3399
AV_PIX_FMT_YUV444P10
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:333
offset
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
CLOSE_READER
#define CLOSE_READER(name, gb)
Definition: get_bits.h:144
dnxhd_decode_dct_block_10_444
static int dnxhd_decode_dct_block_10_444(const DNXHDContext *ctx, RowContext *row, int n)
Definition: dnxhddec.c:425
AV_CODEC_CAP_FRAME_THREADS
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:919
VLC
Definition: get_bits.h:63
DNXHDContext::mb_scan_index
uint32_t mb_scan_index[256]
Definition: dnxhddec.c:60
AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:67
CIDEntry::chroma_weight
const uint8_t * chroma_weight
Definition: dnxhddata.h:52
SKIP_BITS
#define SKIP_BITS(name, gb, num)
Definition: get_bits.h:188
ONLY_IF_THREADS_ENABLED
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:215
av_reduce
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
AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:266
AVFrame::pict_type
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:252
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:1711
NEG_USR32
#define NEG_USR32(a, s)
Definition: mathops.h:174
CIDEntry::run
const uint8_t * run
Definition: dnxhddata.h:57
DNXHDContext::act
int act
Definition: dnxhddec.c:70
LAST_SKIP_BITS
#define LAST_SKIP_BITS(name, gb, num)
Definition: get_bits.h:194
DNXHDContext::scantable
ScanTable scantable
Definition: dnxhddec.c:65
n
int n
Definition: avisynth_c.h:547
DNXHDContext::mb_width
unsigned int mb_width
Definition: dnxhddec.c:59
GET_VLC
#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:497
IDCTDSPContext::idct_permutation
uint8_t idct_permutation[64]
IDCT input permutation.
Definition: idctdsp.h:94
AVCodecContext::height
int height
Definition: avcodec.h:1711
DNXHD_HEADER_HR2
#define DNXHD_HEADER_HR2
Definition: dnxhddata.h:38
dnxhd_decode_macroblock
static int dnxhd_decode_macroblock(const DNXHDContext *ctx, RowContext *row, AVFrame *frame, int x, int y)
Definition: dnxhddec.c:443
SHOW_UBITS
#define SHOW_UBITS(name, gb, num)
Definition: get_bits.h:206
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen_template.c:36
AVCodecContext::thread_count
int thread_count
thread count is used to decide how many independent tasks should be passed to execute() ...
Definition: avcodec.h:2954
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
AV_CODEC_CAP_SLICE_THREADS
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:923
IDCTDSPContext::idct_put
void(* idct_put)(uint8_t *dest, int line_size, int16_t *block)
block -> idct -> clip to unsigned 8 bit -> dest.
Definition: idctdsp.h:70
CIDEntry::bit_depth
int bit_depth
Definition: dnxhddata.h:50
DNXHDContext::width
unsigned int width
Definition: dnxhddec.c:57
avcodec.h
Libavcodec external API header.
RowContext::last_qscale
int last_qscale
Definition: dnxhddec.c:44
RowContext::blocks
int16_t blocks[12][64]
Definition: dnxhddec.c:39
DNXHDContext::cur_field
int cur_field
current interlaced field
Definition: dnxhddec.c:62
DNXHDContext::mb_height
unsigned int mb_height
Definition: dnxhddec.c:59
ff_blockdsp_init
av_cold void ff_blockdsp_init(BlockDSPContext *c, AVCodecContext *avctx)
Definition: blockdsp.c:58
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:209
ff_thread_get_buffer
int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
Wrapper around get_buffer() for frame-multithreaded codecs.
Definition: pthread_frame.c:843
dnxhd_decode_dct_block_10
static int dnxhd_decode_dct_block_10(const DNXHDContext *ctx, RowContext *row, int n)
Definition: dnxhddec.c:419
AVCodecContext
main external API structure.
Definition: avcodec.h:1532
format
static const char * format
Definition: movenc-test.c:47
DNXHDContext::mbaff
int mbaff
Definition: dnxhddec.c:69
OPEN_READER
#define OPEN_READER(name, gb)
Definition: get_bits.h:133
init_vlc
#define init_vlc(vlc, nb_bits, nb_codes,bits, bits_wrap, bits_size,codes, codes_wrap, codes_size,flags)
Definition: get_bits.h:465
buf
void * buf
Definition: avisynth_c.h:553
get_bits1
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:312
AVCodecContext::coded_height
int coded_height
Definition: avcodec.h:1726
CIDEntry::eob_index
int eob_index
Definition: dnxhddata.h:51
index
int index
Definition: gxfenc.c:89
RowContext::chroma_scale
int chroma_scale[64]
Definition: dnxhddec.c:41
AVCodecContext::colorspace
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:2255
init_get_bits
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:418
GET_CACHE
#define GET_CACHE(name, gb)
Definition: get_bits.h:210
ff_zigzag_direct
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:98
DNXHDContext::is_444
int is_444
Definition: dnxhddec.c:68
AV_PIX_FMT_GBRP12
#define AV_PIX_FMT_GBRP12
Definition: pixfmt.h:347
AV_PIX_FMT_YUV422P10
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:331
flags
static int flags
Definition: cpu.c:47
AV_PIX_FMT_YUV444P12
#define AV_PIX_FMT_YUV444P12
Definition: pixfmt.h:337
dnxhd_init_vlc
static int dnxhd_init_vlc(DNXHDContext *ctx, uint32_t cid, int bitdepth)
Definition: dnxhddec.c:107
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:192
level
uint8_t level
Definition: svq3.c:150
DNXHD_VARIABLE
#define DNXHD_VARIABLE
Indicate that a CIDEntry value must be read in the bitstream.
Definition: dnxhddata.h:41
decode
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:572
SHOW_SBITS
#define SHOW_SBITS(name, gb, num)
Definition: get_bits.h:207
RowContext::gb
GetBitContext gb
Definition: dnxhddec.c:42
internal.h
common internal api header.
if
if(ret< 0)
Definition: vf_mcdeint.c:282
DNXHDContext::data_offset
int data_offset
Definition: dnxhddec.c:61
DNXHDContext::decode_dct_block
int(* decode_dct_block)(const struct DNXHDContext *ctx, RowContext *row, int n)
Definition: dnxhddec.c:71
bit_depth
static unsigned bit_depth(uint64_t mask)
Definition: af_astats.c:128
AVRational::den
int den
denominator
Definition: rational.h:45
DNXHDContext::buf_size
int buf_size
Definition: dnxhddec.c:55
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:1574
ff_init_scantable
av_cold void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable)
Definition: idctdsp.c:29
ff_idctdsp_init
av_cold void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx)
Definition: idctdsp.c:241
AVFrame::top_field_first
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:317
dnxhd_decode_frame
static int dnxhd_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: dnxhddec.c:570
len
int len
Definition: vorbis_enc_data.h:452
AVCodecContext::execute2
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:3014
VLC::table
VLC_TYPE(* table)[2]
code, bits
Definition: get_bits.h:65
DNXHDContext::avctx
AVCodecContext * avctx
Definition: dnxhddec.c:51
AVFrame::key_frame
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:247
DNXHDContext::bdsp
BlockDSPContext bdsp
Definition: dnxhddec.c:53
ff_dnxhd_decoder
AVCodec ff_dnxhd_decoder
Definition: dnxhddec.c:683
DNXHDContext::cid_table
const CIDEntry * cid_table
Definition: dnxhddec.c:66
av_mallocz_array
static void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.h:229
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:193
av_always_inline
#define av_always_inline
Definition: attributes.h:39
CIDEntry::cid
int cid
Definition: dnxhddata.h:44
dnxhd_decode_header
static int dnxhd_decode_header(DNXHDContext *ctx, AVFrame *frame, const uint8_t *buf, int buf_size, int first_field)
Definition: dnxhddec.c:162
av_get_pix_fmt_name
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:2078
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:61
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1444
ff_free_vlc
void ff_free_vlc(VLC *vlc)
Definition: bitstream.c:360
RowContext::last_dc
int last_dc[3]
Definition: dnxhddec.c:43
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:856
AVCodecContext::strict_std_compliance
int strict_std_compliance
strictly follow the standard (MPEG4, ...).
Definition: avcodec.h:2741
dnxhd_decode_dct_block_12_444
static int dnxhd_decode_dct_block_12_444(const DNXHDContext *ctx, RowContext *row, int n)
Definition: dnxhddec.c:437
dnxhd_decode_init
static av_cold int dnxhd_decode_init(AVCodecContext *avctx)
Definition: dnxhddec.c:89
block
static int16_t block[64]
Definition: dct-test.c:112
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