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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  *
6  * 10 bit support added by MirriAd Ltd, Joseph Artsimovich <joseph@mirriad.com>
7  *
8  * This file is part of FFmpeg.
9  *
10  * FFmpeg is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU Lesser General Public
12  * License as published by the Free Software Foundation; either
13  * version 2.1 of the License, or (at your option) any later version.
14  *
15  * FFmpeg is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18  * Lesser General Public License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public
21  * License along with FFmpeg; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23  */
24 
25 #include "libavutil/imgutils.h"
26 #include "libavutil/timer.h"
27 #include "avcodec.h"
28 #include "blockdsp.h"
29 #include "get_bits.h"
30 #include "dnxhddata.h"
31 #include "idctdsp.h"
32 #include "internal.h"
33 #include "thread.h"
34 
35 typedef struct DNXHDContext {
39  int64_t cid; ///< compression id
40  unsigned int width, height;
42  unsigned int mb_width, mb_height;
43  uint32_t mb_scan_index[68]; /* max for 1080p */
44  int cur_field; ///< current interlaced field
46  int last_dc[3];
48  DECLARE_ALIGNED(16, int16_t, blocks)[12][64];
51  int bit_depth; // 8, 10 or 0 if not initialized at all.
52  int is_444;
53  void (*decode_dct_block)(struct DNXHDContext *ctx, int16_t *block,
54  int n, int qscale);
56  int luma_scale[64];
57  int chroma_scale[64];
58 } DNXHDContext;
59 
60 #define DNXHD_VLC_BITS 9
61 #define DNXHD_DC_VLC_BITS 7
62 
63 static void dnxhd_decode_dct_block_8(DNXHDContext *ctx, int16_t *block,
64  int n, int qscale);
65 static void dnxhd_decode_dct_block_10(DNXHDContext *ctx, int16_t *block,
66  int n, int qscale);
67 static void dnxhd_decode_dct_block_10_444(DNXHDContext *ctx, int16_t *block,
68  int n, int qscale);
69 
71 {
72  DNXHDContext *ctx = avctx->priv_data;
73 
74  ctx->avctx = avctx;
75  ctx->cid = -1;
76  return 0;
77 }
78 
79 static int dnxhd_init_vlc(DNXHDContext *ctx, uint32_t cid)
80 {
81  if (cid != ctx->cid) {
82  int index;
83 
84  if ((index = ff_dnxhd_get_cid_table(cid)) < 0) {
85  av_log(ctx->avctx, AV_LOG_ERROR, "unsupported cid %d\n", cid);
86  return AVERROR(ENOSYS);
87  }
88  if (ff_dnxhd_cid_table[index].bit_depth != ctx->bit_depth) {
89  av_log(ctx->avctx, AV_LOG_ERROR, "bit depth mismatches %d %d\n", ff_dnxhd_cid_table[index].bit_depth, ctx->bit_depth);
90  return AVERROR_INVALIDDATA;
91  }
93 
94  ff_free_vlc(&ctx->ac_vlc);
95  ff_free_vlc(&ctx->dc_vlc);
96  ff_free_vlc(&ctx->run_vlc);
97 
98  init_vlc(&ctx->ac_vlc, DNXHD_VLC_BITS, 257,
99  ctx->cid_table->ac_bits, 1, 1,
100  ctx->cid_table->ac_codes, 2, 2, 0);
101  init_vlc(&ctx->dc_vlc, DNXHD_DC_VLC_BITS, ctx->bit_depth + 4,
102  ctx->cid_table->dc_bits, 1, 1,
103  ctx->cid_table->dc_codes, 1, 1, 0);
104  init_vlc(&ctx->run_vlc, DNXHD_VLC_BITS, 62,
105  ctx->cid_table->run_bits, 1, 1,
106  ctx->cid_table->run_codes, 2, 2, 0);
107 
110  ctx->cid = cid;
111  }
112  return 0;
113 }
114 
116  const uint8_t *buf, int buf_size,
117  int first_field)
118 {
119  static const uint8_t header_prefix[] = { 0x00, 0x00, 0x02, 0x80, 0x01 };
120  static const uint8_t header_prefix444[] = { 0x00, 0x00, 0x02, 0x80, 0x02 };
121  int i, cid, ret;
122  int old_bit_depth = ctx->bit_depth;
123 
124  if (buf_size < 0x280) {
125  av_log(ctx->avctx, AV_LOG_ERROR, "buffer too small (%d < 640).\n",
126  buf_size);
127  return AVERROR_INVALIDDATA;
128  }
129 
130  if (memcmp(buf, header_prefix, 5) && memcmp(buf, header_prefix444, 5)) {
131  av_log(ctx->avctx, AV_LOG_ERROR, "error in header\n");
132  return AVERROR_INVALIDDATA;
133  }
134  if (buf[5] & 2) { /* interlaced */
135  ctx->cur_field = buf[5] & 1;
136  frame->interlaced_frame = 1;
137  frame->top_field_first = first_field ^ ctx->cur_field;
138  av_log(ctx->avctx, AV_LOG_DEBUG,
139  "interlaced %d, cur field %d\n", buf[5] & 3, ctx->cur_field);
140  }
141 
142  ctx->height = AV_RB16(buf + 0x18);
143  ctx->width = AV_RB16(buf + 0x1a);
144 
145  av_dlog(ctx->avctx, "width %d, height %d\n", ctx->width, ctx->height);
146 
147  if (buf[0x21] == 0x58) { /* 10 bit */
148  ctx->bit_depth = ctx->avctx->bits_per_raw_sample = 10;
149 
150  if (buf[0x4] == 0x2) {
153  ctx->is_444 = 1;
154  } else {
157  ctx->is_444 = 0;
158  }
159  } else if (buf[0x21] == 0x38) { /* 8 bit */
160  ctx->bit_depth = ctx->avctx->bits_per_raw_sample = 8;
161 
163  ctx->is_444 = 0;
165  } else {
166  av_log(ctx->avctx, AV_LOG_ERROR, "invalid bit depth value (%d).\n",
167  buf[0x21]);
168  return AVERROR_INVALIDDATA;
169  }
170  if (ctx->bit_depth != old_bit_depth) {
171  ff_blockdsp_init(&ctx->bdsp, ctx->avctx);
172  ff_idctdsp_init(&ctx->idsp, ctx->avctx);
173  }
174 
175  cid = AV_RB32(buf + 0x28);
176  av_dlog(ctx->avctx, "compression id %d\n", cid);
177 
178  if ((ret = dnxhd_init_vlc(ctx, cid)) < 0)
179  return ret;
180 
181  // make sure profile size constraints are respected
182  // DNx100 allows 1920->1440 and 1280->960 subsampling
183  if (ctx->width != ctx->cid_table->width) {
186  ctx->width, ctx->cid_table->width, 255);
187  ctx->width = ctx->cid_table->width;
188  }
189 
190  if (buf_size < ctx->cid_table->coding_unit_size) {
191  av_log(ctx->avctx, AV_LOG_ERROR, "incorrect frame size (%d < %d).\n",
192  buf_size, ctx->cid_table->coding_unit_size);
193  return AVERROR_INVALIDDATA;
194  }
195 
196  ctx->mb_width = ctx->width >> 4;
197  ctx->mb_height = buf[0x16d];
198 
199  av_dlog(ctx->avctx,
200  "mb width %d, mb height %d\n", ctx->mb_width, ctx->mb_height);
201 
202  if ((ctx->height + 15) >> 4 == ctx->mb_height && frame->interlaced_frame)
203  ctx->height <<= 1;
204 
205  if (ctx->mb_height > 68 ||
206  (ctx->mb_height << frame->interlaced_frame) > (ctx->height + 15) >> 4) {
207  av_log(ctx->avctx, AV_LOG_ERROR,
208  "mb height too big: %d\n", ctx->mb_height);
209  return AVERROR_INVALIDDATA;
210  }
211 
212  for (i = 0; i < ctx->mb_height; i++) {
213  ctx->mb_scan_index[i] = AV_RB32(buf + 0x170 + (i << 2));
214  av_dlog(ctx->avctx, "mb scan index %d\n", ctx->mb_scan_index[i]);
215  if (buf_size < ctx->mb_scan_index[i] + 0x280LL) {
216  av_log(ctx->avctx, AV_LOG_ERROR,
217  "invalid mb scan index (%d < %d).\n",
218  buf_size, ctx->mb_scan_index[i] + 0x280);
219  return AVERROR_INVALIDDATA;
220  }
221  }
222 
223  return 0;
224 }
225 
227  int16_t *block, int n,
228  int qscale,
229  int index_bits,
230  int level_bias,
231  int level_shift)
232 {
233  int i, j, index1, index2, len, flags;
234  int level, component, sign;
235  const int *scale;
236  const uint8_t *weight_matrix;
237  const uint8_t *ac_level = ctx->cid_table->ac_level;
238  const uint8_t *ac_flags = ctx->cid_table->ac_flags;
239  const int eob_index = ctx->cid_table->eob_index;
240  OPEN_READER(bs, &ctx->gb);
241 
242  if (!ctx->is_444) {
243  if (n & 2) {
244  component = 1 + (n & 1);
245  scale = ctx->chroma_scale;
246  weight_matrix = ctx->cid_table->chroma_weight;
247  } else {
248  component = 0;
249  scale = ctx->luma_scale;
250  weight_matrix = ctx->cid_table->luma_weight;
251  }
252  } else {
253  component = (n >> 1) % 3;
254  if (component) {
255  scale = ctx->chroma_scale;
256  weight_matrix = ctx->cid_table->chroma_weight;
257  } else {
258  scale = ctx->luma_scale;
259  weight_matrix = ctx->cid_table->luma_weight;
260  }
261  }
262 
263  UPDATE_CACHE(bs, &ctx->gb);
264  GET_VLC(len, bs, &ctx->gb, ctx->dc_vlc.table, DNXHD_DC_VLC_BITS, 1);
265  if (len) {
266  level = GET_CACHE(bs, &ctx->gb);
267  LAST_SKIP_BITS(bs, &ctx->gb, len);
268  sign = ~level >> 31;
269  level = (NEG_USR32(sign ^ level, len) ^ sign) - sign;
270  ctx->last_dc[component] += level;
271  }
272  block[0] = ctx->last_dc[component];
273 
274  i = 0;
275 
276  UPDATE_CACHE(bs, &ctx->gb);
277  GET_VLC(index1, bs, &ctx->gb, ctx->ac_vlc.table,
278  DNXHD_VLC_BITS, 2);
279 
280  while (index1 != eob_index) {
281  level = ac_level[index1];
282  flags = ac_flags[index1];
283 
284  sign = SHOW_SBITS(bs, &ctx->gb, 1);
285  SKIP_BITS(bs, &ctx->gb, 1);
286 
287  if (flags & 1) {
288  level += SHOW_UBITS(bs, &ctx->gb, index_bits) << 7;
289  SKIP_BITS(bs, &ctx->gb, index_bits);
290  }
291 
292  if (flags & 2) {
293  UPDATE_CACHE(bs, &ctx->gb);
294  GET_VLC(index2, bs, &ctx->gb, ctx->run_vlc.table,
295  DNXHD_VLC_BITS, 2);
296  i += ctx->cid_table->run[index2];
297  }
298 
299  if (++i > 63) {
300  av_log(ctx->avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", n, i);
301  break;
302  }
303 
304  j = ctx->scantable.permutated[i];
305  level *= scale[i];
306  if (level_bias < 32 || weight_matrix[i] != level_bias)
307  level += level_bias;
308  level >>= level_shift;
309 
310  block[j] = (level ^ sign) - sign;
311 
312  UPDATE_CACHE(bs, &ctx->gb);
313  GET_VLC(index1, bs, &ctx->gb, ctx->ac_vlc.table,
314  DNXHD_VLC_BITS, 2);
315  }
316 
317  CLOSE_READER(bs, &ctx->gb);
318 }
319 
320 static void dnxhd_decode_dct_block_8(DNXHDContext *ctx, int16_t *block,
321  int n, int qscale)
322 {
323  dnxhd_decode_dct_block(ctx, block, n, qscale, 4, 32, 6);
324 }
325 
326 static void dnxhd_decode_dct_block_10(DNXHDContext *ctx, int16_t *block,
327  int n, int qscale)
328 {
329  dnxhd_decode_dct_block(ctx, block, n, qscale, 6, 8, 4);
330 }
331 
333  int n, int qscale)
334 {
335  dnxhd_decode_dct_block(ctx, block, n, qscale, 6, 32, 6);
336 }
337 
339  int x, int y)
340 {
341  int shift1 = ctx->bit_depth == 10;
342  int dct_linesize_luma = frame->linesize[0];
343  int dct_linesize_chroma = frame->linesize[1];
344  uint8_t *dest_y, *dest_u, *dest_v;
345  int dct_y_offset, dct_x_offset;
346  int qscale, i;
347 
348  qscale = get_bits(&ctx->gb, 11);
349  skip_bits1(&ctx->gb);
350 
351  if (qscale != ctx->last_qscale) {
352  for (i = 0; i < 64; i++) {
353  ctx->luma_scale[i] = qscale * ctx->cid_table->luma_weight[i];
354  ctx->chroma_scale[i] = qscale * ctx->cid_table->chroma_weight[i];
355  }
356  ctx->last_qscale = qscale;
357  }
358 
359  for (i = 0; i < 8; i++) {
360  ctx->bdsp.clear_block(ctx->blocks[i]);
361  ctx->decode_dct_block(ctx, ctx->blocks[i], i, qscale);
362  }
363  if (ctx->is_444) {
364  for (; i < 12; i++) {
365  ctx->bdsp.clear_block(ctx->blocks[i]);
366  ctx->decode_dct_block(ctx, ctx->blocks[i], i, qscale);
367  }
368  }
369 
370  if (frame->interlaced_frame) {
371  dct_linesize_luma <<= 1;
372  dct_linesize_chroma <<= 1;
373  }
374 
375  dest_y = frame->data[0] + ((y * dct_linesize_luma) << 4) + (x << (4 + shift1));
376  dest_u = frame->data[1] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
377  dest_v = frame->data[2] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
378 
379  if (frame->interlaced_frame && ctx->cur_field) {
380  dest_y += frame->linesize[0];
381  dest_u += frame->linesize[1];
382  dest_v += frame->linesize[2];
383  }
384 
385  dct_y_offset = dct_linesize_luma << 3;
386  dct_x_offset = 8 << shift1;
387  if (!ctx->is_444) {
388  ctx->idsp.idct_put(dest_y, dct_linesize_luma, ctx->blocks[0]);
389  ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, ctx->blocks[1]);
390  ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, ctx->blocks[4]);
391  ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, ctx->blocks[5]);
392 
393  if (!(ctx->avctx->flags & CODEC_FLAG_GRAY)) {
394  dct_y_offset = dct_linesize_chroma << 3;
395  ctx->idsp.idct_put(dest_u, dct_linesize_chroma, ctx->blocks[2]);
396  ctx->idsp.idct_put(dest_v, dct_linesize_chroma, ctx->blocks[3]);
397  ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, ctx->blocks[6]);
398  ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, ctx->blocks[7]);
399  }
400  } else {
401  ctx->idsp.idct_put(dest_y, dct_linesize_luma, ctx->blocks[0]);
402  ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, ctx->blocks[1]);
403  ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, ctx->blocks[6]);
404  ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, ctx->blocks[7]);
405 
406  if (!(ctx->avctx->flags & CODEC_FLAG_GRAY)) {
407  dct_y_offset = dct_linesize_chroma << 3;
408  ctx->idsp.idct_put(dest_u, dct_linesize_chroma, ctx->blocks[2]);
409  ctx->idsp.idct_put(dest_u + dct_x_offset, dct_linesize_chroma, ctx->blocks[3]);
410  ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, ctx->blocks[8]);
411  ctx->idsp.idct_put(dest_u + dct_y_offset + dct_x_offset, dct_linesize_chroma, ctx->blocks[9]);
412  ctx->idsp.idct_put(dest_v, dct_linesize_chroma, ctx->blocks[4]);
413  ctx->idsp.idct_put(dest_v + dct_x_offset, dct_linesize_chroma, ctx->blocks[5]);
414  ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, ctx->blocks[10]);
415  ctx->idsp.idct_put(dest_v + dct_y_offset + dct_x_offset, dct_linesize_chroma, ctx->blocks[11]);
416  }
417  }
418 
419  return 0;
420 }
421 
423  const uint8_t *buf, int buf_size)
424 {
425  int x, y;
426  for (y = 0; y < ctx->mb_height; y++) {
427  ctx->last_dc[0] =
428  ctx->last_dc[1] =
429  ctx->last_dc[2] = 1 << (ctx->bit_depth + 2); // for levels +2^(bitdepth-1)
430  init_get_bits(&ctx->gb, buf + ctx->mb_scan_index[y], (buf_size - ctx->mb_scan_index[y]) << 3);
431  for (x = 0; x < ctx->mb_width; x++) {
432  //START_TIMER;
433  dnxhd_decode_macroblock(ctx, frame, x, y);
434  //STOP_TIMER("decode macroblock");
435  }
436  }
437  return 0;
438 }
439 
441  int *got_frame, AVPacket *avpkt)
442 {
443  const uint8_t *buf = avpkt->data;
444  int buf_size = avpkt->size;
445  DNXHDContext *ctx = avctx->priv_data;
446  ThreadFrame frame = { .f = data };
447  AVFrame *picture = data;
448  int first_field = 1;
449  int ret;
450 
451  av_dlog(avctx, "frame size %d\n", buf_size);
452 
453 decode_coding_unit:
454  if ((ret = dnxhd_decode_header(ctx, picture, buf, buf_size, first_field)) < 0)
455  return ret;
456 
457  if ((avctx->width || avctx->height) &&
458  (ctx->width != avctx->width || ctx->height != avctx->height)) {
459  av_log(avctx, AV_LOG_WARNING, "frame size changed: %dx%d -> %dx%d\n",
460  avctx->width, avctx->height, ctx->width, ctx->height);
461  first_field = 1;
462  }
463  if (avctx->pix_fmt != AV_PIX_FMT_NONE && avctx->pix_fmt != ctx->pix_fmt) {
464  av_log(avctx, AV_LOG_WARNING, "pix_fmt changed: %s -> %s\n",
466  first_field = 1;
467  }
468 
469  avctx->pix_fmt = ctx->pix_fmt;
470  ret = ff_set_dimensions(avctx, ctx->width, ctx->height);
471  if (ret < 0)
472  return ret;
473 
474  if (first_field) {
475  if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
476  return ret;
477  picture->pict_type = AV_PICTURE_TYPE_I;
478  picture->key_frame = 1;
479  }
480 
481  dnxhd_decode_macroblocks(ctx, picture, buf + 0x280, buf_size - 0x280);
482 
483  if (first_field && picture->interlaced_frame) {
484  buf += ctx->cid_table->coding_unit_size;
485  buf_size -= ctx->cid_table->coding_unit_size;
486  first_field = 0;
487  goto decode_coding_unit;
488  }
489 
490  *got_frame = 1;
491  return avpkt->size;
492 }
493 
495 {
496  DNXHDContext *ctx = avctx->priv_data;
497 
498  ff_free_vlc(&ctx->ac_vlc);
499  ff_free_vlc(&ctx->dc_vlc);
500  ff_free_vlc(&ctx->run_vlc);
501  return 0;
502 }
503 
505  .name = "dnxhd",
506  .long_name = NULL_IF_CONFIG_SMALL("VC3/DNxHD"),
507  .type = AVMEDIA_TYPE_VIDEO,
508  .id = AV_CODEC_ID_DNXHD,
509  .priv_data_size = sizeof(DNXHDContext),
511  .close = dnxhd_decode_close,
513  .capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,
514 };
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
This structure describes decoded (raw) audio or video data.
Definition: frame.h:163
const uint8_t * ac_level
Definition: dnxhddata.h:41
const uint8_t * dc_bits
Definition: dnxhddata.h:39
IDCTDSPContext idsp
Definition: dnxhddec.c:47
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
void(* clear_block)(int16_t *block)
Definition: blockdsp.h:35
int64_t cid
compression id
Definition: dnxhddec.c:39
misc image utilities
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:260
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:181
const uint8_t * luma_weight
Definition: dnxhddata.h:38
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:229
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int last_dc[3]
Definition: dnxhddec.c:46
Scantable.
Definition: idctdsp.h:29
int num
numerator
Definition: rational.h:44
int size
Definition: avcodec.h:1161
const CIDEntry ff_dnxhd_cid_table[]
Definition: dnxhddata.c:989
const uint16_t * run_codes
Definition: dnxhddata.h:43
#define DECLARE_ALIGNED(n, t, v)
Definition: mem.h:53
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:1621
VLC run_vlc
Definition: dnxhddec.c:45
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1442
void(* decode_dct_block)(struct DNXHDContext *ctx, int16_t *block, int n, int qscale)
Definition: dnxhddec.c:53
av_dlog(ac->avr,"%d samples - audio_convert: %s to %s (%s)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic?ac->func_descr_generic:ac->func_descr)
uint8_t permutated[64]
Definition: idctdsp.h:31
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:2725
VLC dc_vlc
Definition: dnxhddec.c:45
AVCodec.
Definition: avcodec.h:3173
static av_cold int dnxhd_decode_close(AVCodecContext *avctx)
Definition: dnxhddec.c:494
uint8_t
#define av_cold
Definition: attributes.h:74
#define AV_RB32
Definition: intreadwrite.h:130
Multithreading support functions.
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:787
static AVFrame * frame
uint8_t * data
Definition: avcodec.h:1160
const uint8_t * run_bits
Definition: dnxhddata.h:44
bitstream reader API header.
int bit_depth
Definition: dnxhddec.c:51
#define DNXHD_VLC_BITS
Definition: dnxhddec.c:60
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:359
unsigned int coding_unit_size
Definition: dnxhddata.h:34
#define DNXHD_DC_VLC_BITS
Definition: dnxhddec.c:61
high precision timer, useful to profile code
enum AVPixelFormat pix_fmt
Definition: dnxhddec.c:41
#define av_log(a,...)
static int first_field(const struct video_data *s)
Definition: v4l2.c:228
VLC ac_vlc
Definition: dnxhddec.c:45
const uint8_t * ac_bits
Definition: dnxhddata.h:41
const uint16_t * ac_codes
Definition: dnxhddata.h:40
#define UPDATE_CACHE(name, gb)
Definition: get_bits.h:173
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:175
int ff_dnxhd_get_cid_table(int cid)
Definition: dnxhddata.c:1088
unsigned int width
Definition: dnxhddata.h:31
static const int shift1[6]
Definition: dxa.c:50
int luma_scale[64]
Definition: dnxhddec.c:56
#define AV_RB16
Definition: intreadwrite.h:53
#define AVERROR(e)
Definition: error.h:43
uint32_t mb_scan_index[68]
Definition: dnxhddec.c:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:180
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:196
int flags
CODEC_FLAG_*.
Definition: avcodec.h:1333
unsigned int height
Definition: dnxhddec.c:40
const uint8_t * dc_codes
Definition: dnxhddata.h:39
const char * name
Name of the codec implementation.
Definition: avcodec.h:3180
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:360
#define CLOSE_READER(name, gb)
Definition: get_bits.h:144
Libavcodec external API header.
Definition: get_bits.h:63
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:72
const uint8_t * chroma_weight
Definition: dnxhddata.h:38
#define SKIP_BITS(name, gb, num)
Definition: get_bits.h:188
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
static av_always_inline void dnxhd_decode_dct_block(DNXHDContext *ctx, int16_t *block, int n, int qscale, int index_bits, int level_bias, int level_shift)
Definition: dnxhddec.c:226
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:234
float y
int last_qscale
Definition: dnxhddec.c:55
ret
Definition: avfilter.c:974
int width
picture width / height.
Definition: avcodec.h:1412
#define NEG_USR32(a, s)
Definition: mathops.h:175
const uint8_t * run
Definition: dnxhddata.h:44
static void dnxhd_decode_dct_block_10(DNXHDContext *ctx, int16_t *block, int n, int qscale)
Definition: dnxhddec.c:326
#define LAST_SKIP_BITS(name, gb, num)
Definition: get_bits.h:194
ScanTable scantable
Definition: dnxhddec.c:49
int n
Definition: avisynth_c.h:589
unsigned int mb_width
Definition: dnxhddec.c:42
#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:489
uint8_t idct_permutation[64]
IDCT input permutation.
Definition: idctdsp.h:94
static int dnxhd_init_vlc(DNXHDContext *ctx, uint32_t cid)
Definition: dnxhddec.c:79
#define SHOW_UBITS(name, gb, num)
Definition: get_bits.h:206
static int dnxhd_decode_macroblocks(DNXHDContext *ctx, AVFrame *frame, const uint8_t *buf, int buf_size)
Definition: dnxhddec.c:422
void(* idct_put)(uint8_t *dest, int line_size, int16_t *block)
block -> idct -> clip to unsigned 8 bit -> dest.
Definition: idctdsp.h:70
int bit_depth
Definition: dnxhddata.h:36
const uint8_t * ac_flags
Definition: dnxhddata.h:42
unsigned int width
Definition: dnxhddec.c:40
int cur_field
current interlaced field
Definition: dnxhddec.c:44
unsigned int mb_height
Definition: dnxhddec.c:42
av_cold void ff_blockdsp_init(BlockDSPContext *c, AVCodecContext *avctx)
Definition: blockdsp.c:58
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:191
int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
Wrapper around get_buffer() for frame-multithreaded codecs.
int chroma_scale[64]
Definition: dnxhddec.c:57
main external API structure.
Definition: avcodec.h:1239
static void(WINAPI *cond_broadcast)(pthread_cond_t *cond)
#define OPEN_READER(name, gb)
Definition: get_bits.h:133
#define init_vlc(vlc, nb_bits, nb_codes,bits, bits_wrap, bits_size,codes, codes_wrap, codes_size,flags)
Definition: get_bits.h:457
void * buf
Definition: avisynth_c.h:595
static void dnxhd_decode_dct_block_10_444(DNXHDContext *ctx, int16_t *block, int n, int qscale)
Definition: dnxhddec.c:332
static void skip_bits1(GetBitContext *s)
Definition: get_bits.h:329
int eob_index
Definition: dnxhddata.h:37
int index
Definition: gxfenc.c:89
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:410
#define GET_CACHE(name, gb)
Definition: get_bits.h:210
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:117
int is_444
Definition: dnxhddec.c:52
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:359
static int flags
Definition: cpu.c:47
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:174
uint8_t level
Definition: svq3.c:150
static void dnxhd_decode_dct_block_8(DNXHDContext *ctx, int16_t *block, int n, int qscale)
Definition: dnxhddec.c:320
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:520
#define SHOW_SBITS(name, gb, num)
Definition: get_bits.h:207
common internal api header.
#define CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:864
#define CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:736
GetBitContext gb
Definition: dnxhddec.c:37
int den
denominator
Definition: rational.h:45
void * priv_data
Definition: avcodec.h:1281
static int dnxhd_decode_macroblock(DNXHDContext *ctx, AVFrame *frame, int x, int y)
Definition: dnxhddec.c:338
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:241
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:364
static int dnxhd_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: dnxhddec.c:440
int len
VLC_TYPE(* table)[2]
code, bits
Definition: get_bits.h:65
AVCodecContext * avctx
Definition: dnxhddec.c:36
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:229
BlockDSPContext bdsp
Definition: dnxhddec.c:38
AVCodec ff_dnxhd_decoder
Definition: dnxhddec.c:504
const CIDEntry * cid_table
Definition: dnxhddec.c:50
#define av_always_inline
Definition: attributes.h:37
static int dnxhd_decode_header(DNXHDContext *ctx, AVFrame *frame, const uint8_t *buf, int buf_size, int first_field)
Definition: dnxhddec.c:115
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:1950
AVPixelFormat
Pixel format.
Definition: pixfmt.h:66
This structure stores compressed data.
Definition: avcodec.h:1137
void ff_free_vlc(VLC *vlc)
Definition: bitstream.c:356
static av_cold int dnxhd_decode_init(AVCodecContext *avctx)
Definition: dnxhddec.c:70
int16_t blocks[12][64]
Definition: dnxhddec.c:48
static int16_t block[64]
Definition: dct-test.c:110