FFmpeg
diracdec.c
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1 /*
2  * Copyright (C) 2007 Marco Gerards <marco@gnu.org>
3  * Copyright (C) 2009 David Conrad
4  * Copyright (C) 2011 Jordi Ortiz
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 /**
24  * @file
25  * Dirac Decoder
26  * @author Marco Gerards <marco@gnu.org>, David Conrad, Jordi Ortiz <nenjordi@gmail.com>
27  */
28 
29 #include "libavutil/mem_internal.h"
30 #include "libavutil/pixdesc.h"
31 #include "libavutil/thread.h"
32 #include "avcodec.h"
33 #include "get_bits.h"
34 #include "codec_internal.h"
35 #include "decode.h"
36 #include "golomb.h"
37 #include "dirac_arith.h"
38 #include "dirac_vlc.h"
39 #include "mpegpicture.h"
40 #include "mpegvideoencdsp.h"
41 #include "dirac_dwt.h"
42 #include "dirac.h"
43 #include "diractab.h"
44 #include "diracdsp.h"
45 #include "videodsp.h"
46 
47 /**
48  * The spec limits this to 3 for frame coding, but in practice can be as high as 6
49  */
50 #define MAX_REFERENCE_FRAMES 8
51 #define MAX_DELAY 5 /* limit for main profile for frame coding (TODO: field coding) */
52 #define MAX_FRAMES (MAX_REFERENCE_FRAMES + MAX_DELAY + 1)
53 #define MAX_QUANT 255 /* max quant for VC-2 */
54 #define MAX_BLOCKSIZE 32 /* maximum xblen/yblen we support */
55 
56 /**
57  * DiracBlock->ref flags, if set then the block does MC from the given ref
58  */
59 #define DIRAC_REF_MASK_REF1 1
60 #define DIRAC_REF_MASK_REF2 2
61 #define DIRAC_REF_MASK_GLOBAL 4
62 
63 /**
64  * Value of Picture.reference when Picture is not a reference picture, but
65  * is held for delayed output.
66  */
67 #define DELAYED_PIC_REF 4
68 
69 #define CALC_PADDING(size, depth) \
70  (((size + (1 << depth) - 1) >> depth) << depth)
71 
72 #define DIVRNDUP(a, b) (((a) + (b) - 1) / (b))
73 
74 typedef struct {
76  int interpolated[3]; /* 1 if hpel[] is valid */
77  uint8_t *hpel[3][4];
78  uint8_t *hpel_base[3][4];
79  int reference;
80  unsigned picture_number;
81 } DiracFrame;
82 
83 typedef struct {
84  union {
85  int16_t mv[2][2];
86  int16_t dc[3];
87  } u; /* anonymous unions aren't in C99 :( */
88  uint8_t ref;
89 } DiracBlock;
90 
91 typedef struct SubBand {
92  int level;
94  int stride; /* in bytes */
95  int width;
96  int height;
97  int pshift;
98  int quant;
99  uint8_t *ibuf;
100  struct SubBand *parent;
101 
102  /* for low delay */
103  unsigned length;
104  const uint8_t *coeff_data;
105 } SubBand;
106 
107 typedef struct Plane {
109 
110  int width;
111  int height;
112  ptrdiff_t stride;
113 
114  /* block length */
115  uint8_t xblen;
116  uint8_t yblen;
117  /* block separation (block n+1 starts after this many pixels in block n) */
118  uint8_t xbsep;
119  uint8_t ybsep;
120  /* amount of overspill on each edge (half of the overlap between blocks) */
121  uint8_t xoffset;
122  uint8_t yoffset;
123 
125 } Plane;
126 
127 /* Used by Low Delay and High Quality profiles */
128 typedef struct DiracSlice {
130  int slice_x;
131  int slice_y;
132  int bytes;
133 } DiracSlice;
134 
135 typedef struct DiracContext {
144  int64_t frame_number; /* number of the next frame to display */
148 
149  int bit_depth; /* bit depth */
150  int pshift; /* pixel shift = bit_depth > 8 */
151 
152  int zero_res; /* zero residue flag */
153  int is_arith; /* whether coeffs use arith or golomb coding */
154  int core_syntax; /* use core syntax only */
155  int low_delay; /* use the low delay syntax */
156  int hq_picture; /* high quality picture, enables low_delay */
157  int ld_picture; /* use low delay picture, turns on low_delay */
158  int dc_prediction; /* has dc prediction */
159  int globalmc_flag; /* use global motion compensation */
160  int num_refs; /* number of reference pictures */
161 
162  /* wavelet decoding */
163  unsigned wavelet_depth; /* depth of the IDWT */
164  unsigned wavelet_idx;
165 
166  /**
167  * schroedinger older than 1.0.8 doesn't store
168  * quant delta if only one codebook exists in a band
169  */
170  unsigned old_delta_quant;
171  unsigned codeblock_mode;
172 
173  unsigned num_x; /* number of horizontal slices */
174  unsigned num_y; /* number of vertical slices */
175 
176  uint8_t *thread_buf; /* Per-thread buffer for coefficient storage */
177  int threads_num_buf; /* Current # of buffers allocated */
178  int thread_buf_size; /* Each thread has a buffer this size */
179 
182 
183  struct {
184  unsigned width;
185  unsigned height;
187 
188  struct {
189  AVRational bytes; /* average bytes per slice */
190  uint8_t quant[MAX_DWT_LEVELS][4]; /* [DIRAC_STD] E.1 */
191  } lowdelay;
192 
193  struct {
194  unsigned prefix_bytes;
195  uint64_t size_scaler;
196  } highquality;
197 
198  struct {
199  int pan_tilt[2]; /* pan/tilt vector */
200  int zrs[2][2]; /* zoom/rotate/shear matrix */
201  int perspective[2]; /* perspective vector */
202  unsigned zrs_exp;
203  unsigned perspective_exp;
204  } globalmc[2];
205 
206  /* motion compensation */
207  uint8_t mv_precision; /* [DIRAC_STD] REFS_WT_PRECISION */
208  int16_t weight[2]; /* [DIRAC_STD] REF1_WT and REF2_WT */
209  unsigned weight_log2denom; /* [DIRAC_STD] REFS_WT_PRECISION */
210 
211  int blwidth; /* number of blocks (horizontally) */
212  int blheight; /* number of blocks (vertically) */
213  int sbwidth; /* number of superblocks (horizontally) */
214  int sbheight; /* number of superblocks (vertically) */
215 
216  uint8_t *sbsplit;
218 
219  uint8_t *edge_emu_buffer[4];
221 
222  uint16_t *mctmp; /* buffer holding the MC data multiplied by OBMC weights */
223  uint8_t *mcscratch;
225 
227 
228  void (*put_pixels_tab[4])(uint8_t *dst, const uint8_t *src[5], int stride, int h);
229  void (*avg_pixels_tab[4])(uint8_t *dst, const uint8_t *src[5], int stride, int h);
230  void (*add_obmc)(uint16_t *dst, const uint8_t *src, int stride, const uint8_t *obmc_weight, int yblen);
233 
236 
240 } DiracContext;
241 
248 };
249 
250 /* magic number division by 3 from schroedinger */
251 static inline int divide3(int x)
252 {
253  return (int)((x+1U)*21845 + 10922) >> 16;
254 }
255 
256 static DiracFrame *remove_frame(DiracFrame *framelist[], unsigned picnum)
257 {
258  DiracFrame *remove_pic = NULL;
259  int i, remove_idx = -1;
260 
261  for (i = 0; framelist[i]; i++)
262  if (framelist[i]->picture_number == picnum) {
263  remove_pic = framelist[i];
264  remove_idx = i;
265  }
266 
267  if (remove_pic)
268  for (i = remove_idx; framelist[i]; i++)
269  framelist[i] = framelist[i+1];
270 
271  return remove_pic;
272 }
273 
274 static int add_frame(DiracFrame *framelist[], int maxframes, DiracFrame *frame)
275 {
276  int i;
277  for (i = 0; i < maxframes; i++)
278  if (!framelist[i]) {
279  framelist[i] = frame;
280  return 0;
281  }
282  return -1;
283 }
284 
286 {
287  int sbwidth = DIVRNDUP(s->seq.width, 4);
288  int sbheight = DIVRNDUP(s->seq.height, 4);
289  int i, w, h, top_padding;
290 
291  /* todo: think more about this / use or set Plane here */
292  for (i = 0; i < 3; i++) {
293  int max_xblen = MAX_BLOCKSIZE >> (i ? s->chroma_x_shift : 0);
294  int max_yblen = MAX_BLOCKSIZE >> (i ? s->chroma_y_shift : 0);
295  w = s->seq.width >> (i ? s->chroma_x_shift : 0);
296  h = s->seq.height >> (i ? s->chroma_y_shift : 0);
297 
298  /* we allocate the max we support here since num decompositions can
299  * change from frame to frame. Stride is aligned to 16 for SIMD, and
300  * 1<<MAX_DWT_LEVELS top padding to avoid if(y>0) in arith decoding
301  * MAX_BLOCKSIZE padding for MC: blocks can spill up to half of that
302  * on each side */
303  top_padding = FFMAX(1<<MAX_DWT_LEVELS, max_yblen/2);
304  w = FFALIGN(CALC_PADDING(w, MAX_DWT_LEVELS), 8); /* FIXME: Should this be 16 for SSE??? */
305  h = top_padding + CALC_PADDING(h, MAX_DWT_LEVELS) + max_yblen/2;
306 
307  s->plane[i].idwt.buf_base = av_calloc(w + max_xblen, h * (2 << s->pshift));
308  s->plane[i].idwt.tmp = av_malloc_array((w+16), 2 << s->pshift);
309  s->plane[i].idwt.buf = s->plane[i].idwt.buf_base + (top_padding*w)*(2 << s->pshift);
310  if (!s->plane[i].idwt.buf_base || !s->plane[i].idwt.tmp)
311  return AVERROR(ENOMEM);
312  }
313 
314  /* fixme: allocate using real stride here */
315  s->sbsplit = av_malloc_array(sbwidth, sbheight);
316  s->blmotion = av_malloc_array(sbwidth, sbheight * 16 * sizeof(*s->blmotion));
317 
318  if (!s->sbsplit || !s->blmotion)
319  return AVERROR(ENOMEM);
320  return 0;
321 }
322 
324 {
325  int w = s->seq.width;
326  int h = s->seq.height;
327 
328  av_assert0(stride >= w);
329  stride += 64;
330 
331  if (s->buffer_stride >= stride)
332  return 0;
333  s->buffer_stride = 0;
334 
335  av_freep(&s->edge_emu_buffer_base);
336  memset(s->edge_emu_buffer, 0, sizeof(s->edge_emu_buffer));
337  av_freep(&s->mctmp);
338  av_freep(&s->mcscratch);
339 
340  s->edge_emu_buffer_base = av_malloc_array(stride, MAX_BLOCKSIZE);
341 
342  s->mctmp = av_malloc_array((stride+MAX_BLOCKSIZE), (h+MAX_BLOCKSIZE) * sizeof(*s->mctmp));
343  s->mcscratch = av_malloc_array(stride, MAX_BLOCKSIZE);
344 
345  if (!s->edge_emu_buffer_base || !s->mctmp || !s->mcscratch)
346  return AVERROR(ENOMEM);
347 
348  s->buffer_stride = stride;
349  return 0;
350 }
351 
353 {
354  int i, j, k;
355 
356  for (i = 0; i < MAX_FRAMES; i++) {
357  if (s->all_frames[i].avframe->data[0]) {
358  av_frame_unref(s->all_frames[i].avframe);
359  memset(s->all_frames[i].interpolated, 0, sizeof(s->all_frames[i].interpolated));
360  }
361 
362  for (j = 0; j < 3; j++)
363  for (k = 1; k < 4; k++)
364  av_freep(&s->all_frames[i].hpel_base[j][k]);
365  }
366 
367  memset(s->ref_frames, 0, sizeof(s->ref_frames));
368  memset(s->delay_frames, 0, sizeof(s->delay_frames));
369 
370  for (i = 0; i < 3; i++) {
371  av_freep(&s->plane[i].idwt.buf_base);
372  av_freep(&s->plane[i].idwt.tmp);
373  }
374 
375  s->buffer_stride = 0;
376  av_freep(&s->sbsplit);
377  av_freep(&s->blmotion);
378  av_freep(&s->edge_emu_buffer_base);
379 
380  av_freep(&s->mctmp);
381  av_freep(&s->mcscratch);
382 }
383 
385 
387 {
388  DiracContext *s = avctx->priv_data;
389  int i, ret;
390 
391  s->avctx = avctx;
392  s->frame_number = -1;
393 
394  s->thread_buf = NULL;
395  s->threads_num_buf = -1;
396  s->thread_buf_size = -1;
397 
398  ff_diracdsp_init(&s->diracdsp);
399  ff_mpegvideoencdsp_init(&s->mpvencdsp, avctx);
400  ff_videodsp_init(&s->vdsp, 8);
401 
402  for (i = 0; i < MAX_FRAMES; i++) {
403  s->all_frames[i].avframe = av_frame_alloc();
404  if (!s->all_frames[i].avframe) {
405  while (i > 0)
406  av_frame_free(&s->all_frames[--i].avframe);
407  return AVERROR(ENOMEM);
408  }
409  }
411  if (ret != 0)
412  return AVERROR_UNKNOWN;
413 
414  return 0;
415 }
416 
418 {
419  DiracContext *s = avctx->priv_data;
421  s->seen_sequence_header = 0;
422  s->frame_number = -1;
423 }
424 
426 {
427  DiracContext *s = avctx->priv_data;
428  int i;
429 
430  dirac_decode_flush(avctx);
431  for (i = 0; i < MAX_FRAMES; i++)
432  av_frame_free(&s->all_frames[i].avframe);
433 
434  av_freep(&s->thread_buf);
435  av_freep(&s->slice_params_buf);
436 
437  return 0;
438 }
439 
440 static inline int coeff_unpack_golomb(GetBitContext *gb, int qfactor, int qoffset)
441 {
442  int coeff = dirac_get_se_golomb(gb);
443  const unsigned sign = FFSIGN(coeff);
444  if (coeff)
445  coeff = sign*((sign * coeff * qfactor + qoffset) >> 2);
446  return coeff;
447 }
448 
449 #define SIGN_CTX(x) (CTX_SIGN_ZERO + ((x) > 0) - ((x) < 0))
450 
451 #define UNPACK_ARITH(n, type) \
452  static inline void coeff_unpack_arith_##n(DiracArith *c, int qfactor, int qoffset, \
453  SubBand *b, type *buf, int x, int y) \
454  { \
455  int sign, sign_pred = 0, pred_ctx = CTX_ZPZN_F1; \
456  unsigned coeff; \
457  const int mstride = -(b->stride >> (1+b->pshift)); \
458  if (b->parent) { \
459  const type *pbuf = (type *)b->parent->ibuf; \
460  const int stride = b->parent->stride >> (1+b->parent->pshift); \
461  pred_ctx += !!pbuf[stride * (y>>1) + (x>>1)] << 1; \
462  } \
463  if (b->orientation == subband_hl) \
464  sign_pred = buf[mstride]; \
465  if (x) { \
466  pred_ctx += !(buf[-1] | buf[mstride] | buf[-1 + mstride]); \
467  if (b->orientation == subband_lh) \
468  sign_pred = buf[-1]; \
469  } else { \
470  pred_ctx += !buf[mstride]; \
471  } \
472  coeff = dirac_get_arith_uint(c, pred_ctx, CTX_COEFF_DATA); \
473  if (coeff) { \
474  coeff = (coeff * qfactor + qoffset) >> 2; \
475  sign = dirac_get_arith_bit(c, SIGN_CTX(sign_pred)); \
476  coeff = (coeff ^ -sign) + sign; \
477  } \
478  *buf = coeff; \
479  } \
480 
481 UNPACK_ARITH(8, int16_t)
483 
484 /**
485  * Decode the coeffs in the rectangle defined by left, right, top, bottom
486  * [DIRAC_STD] 13.4.3.2 Codeblock unpacking loop. codeblock()
487  */
488 static inline int codeblock(const DiracContext *s, SubBand *b,
489  GetBitContext *gb, DiracArith *c,
490  int left, int right, int top, int bottom,
491  int blockcnt_one, int is_arith)
492 {
493  int x, y, zero_block;
494  int qoffset, qfactor;
495  uint8_t *buf;
496 
497  /* check for any coded coefficients in this codeblock */
498  if (!blockcnt_one) {
499  if (is_arith)
500  zero_block = dirac_get_arith_bit(c, CTX_ZERO_BLOCK);
501  else
502  zero_block = get_bits1(gb);
503 
504  if (zero_block)
505  return 0;
506  }
507 
508  if (s->codeblock_mode && !(s->old_delta_quant && blockcnt_one)) {
509  int quant;
510  if (is_arith)
512  else
514  if (quant > INT_MAX - b->quant || b->quant + quant < 0) {
515  av_log(s->avctx, AV_LOG_ERROR, "Invalid quant\n");
516  return AVERROR_INVALIDDATA;
517  }
518  b->quant += quant;
519  }
520 
521  if (b->quant > (DIRAC_MAX_QUANT_INDEX - 1)) {
522  av_log(s->avctx, AV_LOG_ERROR, "Unsupported quant %d\n", b->quant);
523  b->quant = 0;
524  return AVERROR_INVALIDDATA;
525  }
526 
527  qfactor = ff_dirac_qscale_tab[b->quant];
528  /* TODO: context pointer? */
529  if (!s->num_refs)
530  qoffset = ff_dirac_qoffset_intra_tab[b->quant] + 2;
531  else
532  qoffset = ff_dirac_qoffset_inter_tab[b->quant] + 2;
533 
534  buf = b->ibuf + top * b->stride;
535  if (is_arith) {
536  for (y = top; y < bottom; y++) {
537  if (c->error)
538  return c->error;
539  for (x = left; x < right; x++) {
540  if (b->pshift) {
541  coeff_unpack_arith_10(c, qfactor, qoffset, b, (int32_t*)(buf)+x, x, y);
542  } else {
543  coeff_unpack_arith_8(c, qfactor, qoffset, b, (int16_t*)(buf)+x, x, y);
544  }
545  }
546  buf += b->stride;
547  }
548  } else {
549  for (y = top; y < bottom; y++) {
550  if (get_bits_left(gb) < 1)
551  return AVERROR_INVALIDDATA;
552  for (x = left; x < right; x++) {
553  int val = coeff_unpack_golomb(gb, qfactor, qoffset);
554  if (b->pshift) {
555  AV_WN32(&buf[4*x], val);
556  } else {
557  AV_WN16(&buf[2*x], val);
558  }
559  }
560  buf += b->stride;
561  }
562  }
563  return 0;
564 }
565 
566 /**
567  * Dirac Specification ->
568  * 13.3 intra_dc_prediction(band)
569  */
570 #define INTRA_DC_PRED(n, type) \
571  static inline void intra_dc_prediction_##n(SubBand *b) \
572  { \
573  type *buf = (type*)b->ibuf; \
574  int x, y; \
575  \
576  for (x = 1; x < b->width; x++) \
577  buf[x] += buf[x-1]; \
578  buf += (b->stride >> (1+b->pshift)); \
579  \
580  for (y = 1; y < b->height; y++) { \
581  buf[0] += buf[-(b->stride >> (1+b->pshift))]; \
582  \
583  for (x = 1; x < b->width; x++) { \
584  int pred = buf[x - 1] + buf[x - (b->stride >> (1+b->pshift))] + buf[x - (b->stride >> (1+b->pshift))-1]; \
585  buf[x] += divide3(pred); \
586  } \
587  buf += (b->stride >> (1+b->pshift)); \
588  } \
589  } \
590 
591 INTRA_DC_PRED(8, int16_t)
592 INTRA_DC_PRED(10, uint32_t)
593 
594 /**
595  * Dirac Specification ->
596  * 13.4.2 Non-skipped subbands. subband_coeffs()
597  */
599  SubBand *b, int is_arith)
600 {
601  int cb_x, cb_y, left, right, top, bottom;
602  DiracArith c;
603  GetBitContext gb;
604  int cb_width = s->codeblock[b->level + (b->orientation != subband_ll)].width;
605  int cb_height = s->codeblock[b->level + (b->orientation != subband_ll)].height;
606  int blockcnt_one = (cb_width + cb_height) == 2;
607  int ret;
608 
609  if (!b->length)
610  return 0;
611 
612  init_get_bits8(&gb, b->coeff_data, b->length);
613 
614  if (is_arith)
615  ff_dirac_init_arith_decoder(&c, &gb, b->length);
616 
617  top = 0;
618  for (cb_y = 0; cb_y < cb_height; cb_y++) {
619  bottom = (b->height * (cb_y+1LL)) / cb_height;
620  left = 0;
621  for (cb_x = 0; cb_x < cb_width; cb_x++) {
622  right = (b->width * (cb_x+1LL)) / cb_width;
623  ret = codeblock(s, b, &gb, &c, left, right, top, bottom, blockcnt_one, is_arith);
624  if (ret < 0)
625  return ret;
626  left = right;
627  }
628  top = bottom;
629  }
630 
631  if (b->orientation == subband_ll && s->num_refs == 0) {
632  if (s->pshift) {
633  intra_dc_prediction_10(b);
634  } else {
635  intra_dc_prediction_8(b);
636  }
637  }
638  return 0;
639 }
640 
641 static int decode_subband_arith(AVCodecContext *avctx, void *b)
642 {
643  const DiracContext *s = avctx->priv_data;
644  return decode_subband_internal(s, b, 1);
645 }
646 
647 static int decode_subband_golomb(AVCodecContext *avctx, void *arg)
648 {
649  const DiracContext *s = avctx->priv_data;
650  SubBand **b = arg;
651  return decode_subband_internal(s, *b, 0);
652 }
653 
654 /**
655  * Dirac Specification ->
656  * [DIRAC_STD] 13.4.1 core_transform_data()
657  */
659 {
660  AVCodecContext *avctx = s->avctx;
662  enum dirac_subband orientation;
663  int level, num_bands = 0;
664  int ret[3*MAX_DWT_LEVELS+1];
665  int i;
666  int damaged_count = 0;
667 
668  /* Unpack all subbands at all levels. */
669  for (level = 0; level < s->wavelet_depth; level++) {
670  for (orientation = !!level; orientation < 4; orientation++) {
671  SubBand *b = &s->plane[comp].band[level][orientation];
672  bands[num_bands++] = b;
673 
674  align_get_bits(&s->gb);
675  /* [DIRAC_STD] 13.4.2 subband() */
676  b->length = get_interleaved_ue_golomb(&s->gb);
677  if (b->length) {
678  b->quant = get_interleaved_ue_golomb(&s->gb);
679  if (b->quant > (DIRAC_MAX_QUANT_INDEX - 1)) {
680  av_log(s->avctx, AV_LOG_ERROR, "Unsupported quant %d\n", b->quant);
681  b->quant = 0;
682  return AVERROR_INVALIDDATA;
683  }
684  align_get_bits(&s->gb);
685  b->coeff_data = s->gb.buffer + get_bits_count(&s->gb)/8;
686  if (b->length > FFMAX(get_bits_left(&s->gb)/8, 0)) {
687  b->length = FFMAX(get_bits_left(&s->gb)/8, 0);
688  damaged_count ++;
689  }
690  skip_bits_long(&s->gb, b->length*8);
691  }
692  }
693  /* arithmetic coding has inter-level dependencies, so we can only execute one level at a time */
694  if (s->is_arith)
695  avctx->execute(avctx, decode_subband_arith, &s->plane[comp].band[level][!!level],
696  ret + 3*level + !!level, 4-!!level, sizeof(SubBand));
697  }
698  /* golomb coding has no inter-level dependencies, so we can execute all subbands in parallel */
699  if (!s->is_arith)
700  avctx->execute(avctx, decode_subband_golomb, bands, ret, num_bands, sizeof(SubBand*));
701 
702  for (i = 0; i < s->wavelet_depth * 3 + 1; i++) {
703  if (ret[i] < 0)
704  damaged_count++;
705  }
706  if (damaged_count > (s->wavelet_depth * 3 + 1) /2)
707  return AVERROR_INVALIDDATA;
708 
709  return 0;
710 }
711 
712 #define PARSE_VALUES(type, x, gb, ebits, buf1, buf2) \
713  type *buf = (type *)buf1; \
714  buf[x] = coeff_unpack_golomb(gb, qfactor, qoffset); \
715  if (get_bits_count(gb) >= ebits) \
716  return; \
717  if (buf2) { \
718  buf = (type *)buf2; \
719  buf[x] = coeff_unpack_golomb(gb, qfactor, qoffset); \
720  if (get_bits_count(gb) >= ebits) \
721  return; \
722  } \
723 
724 static void decode_subband(const DiracContext *s, GetBitContext *gb, int quant,
725  int slice_x, int slice_y, int bits_end,
726  const SubBand *b1, const SubBand *b2)
727 {
728  int left = b1->width * slice_x / s->num_x;
729  int right = b1->width *(slice_x+1) / s->num_x;
730  int top = b1->height * slice_y / s->num_y;
731  int bottom = b1->height *(slice_y+1) / s->num_y;
732 
733  int qfactor, qoffset;
734 
735  uint8_t *buf1 = b1->ibuf + top * b1->stride;
736  uint8_t *buf2 = b2 ? b2->ibuf + top * b2->stride: NULL;
737  int x, y;
738 
739  if (quant > (DIRAC_MAX_QUANT_INDEX - 1)) {
740  av_log(s->avctx, AV_LOG_ERROR, "Unsupported quant %d\n", quant);
741  return;
742  }
743  qfactor = ff_dirac_qscale_tab[quant];
744  qoffset = ff_dirac_qoffset_intra_tab[quant] + 2;
745  /* we have to constantly check for overread since the spec explicitly
746  requires this, with the meaning that all remaining coeffs are set to 0 */
747  if (get_bits_count(gb) >= bits_end)
748  return;
749 
750  if (s->pshift) {
751  for (y = top; y < bottom; y++) {
752  for (x = left; x < right; x++) {
753  PARSE_VALUES(int32_t, x, gb, bits_end, buf1, buf2);
754  }
755  buf1 += b1->stride;
756  if (buf2)
757  buf2 += b2->stride;
758  }
759  }
760  else {
761  for (y = top; y < bottom; y++) {
762  for (x = left; x < right; x++) {
763  PARSE_VALUES(int16_t, x, gb, bits_end, buf1, buf2);
764  }
765  buf1 += b1->stride;
766  if (buf2)
767  buf2 += b2->stride;
768  }
769  }
770 }
771 
772 /**
773  * Dirac Specification ->
774  * 13.5.2 Slices. slice(sx,sy)
775  */
776 static int decode_lowdelay_slice(AVCodecContext *avctx, void *arg)
777 {
778  const DiracContext *s = avctx->priv_data;
779  DiracSlice *slice = arg;
780  GetBitContext *gb = &slice->gb;
781  enum dirac_subband orientation;
782  int level, quant, chroma_bits, chroma_end;
783 
784  int quant_base = get_bits(gb, 7); /*[DIRAC_STD] qindex */
785  int length_bits = av_log2(8 * slice->bytes)+1;
786  int luma_bits = get_bits_long(gb, length_bits);
787  int luma_end = get_bits_count(gb) + FFMIN(luma_bits, get_bits_left(gb));
788 
789  /* [DIRAC_STD] 13.5.5.2 luma_slice_band */
790  for (level = 0; level < s->wavelet_depth; level++)
791  for (orientation = !!level; orientation < 4; orientation++) {
792  quant = FFMAX(quant_base - s->lowdelay.quant[level][orientation], 0);
793  decode_subband(s, gb, quant, slice->slice_x, slice->slice_y, luma_end,
794  &s->plane[0].band[level][orientation], NULL);
795  }
796 
797  /* consume any unused bits from luma */
798  skip_bits_long(gb, get_bits_count(gb) - luma_end);
799 
800  chroma_bits = 8*slice->bytes - 7 - length_bits - luma_bits;
801  chroma_end = get_bits_count(gb) + FFMIN(chroma_bits, get_bits_left(gb));
802  /* [DIRAC_STD] 13.5.5.3 chroma_slice_band */
803  for (level = 0; level < s->wavelet_depth; level++)
804  for (orientation = !!level; orientation < 4; orientation++) {
805  quant = FFMAX(quant_base - s->lowdelay.quant[level][orientation], 0);
806  decode_subband(s, gb, quant, slice->slice_x, slice->slice_y, chroma_end,
807  &s->plane[1].band[level][orientation],
808  &s->plane[2].band[level][orientation]);
809  }
810 
811  return 0;
812 }
813 
814 typedef struct SliceCoeffs {
815  int left;
816  int top;
817  int tot_h;
818  int tot_v;
819  int tot;
820 } SliceCoeffs;
821 
822 static int subband_coeffs(const DiracContext *s, int x, int y, int p,
824 {
825  int level, coef = 0;
826  for (level = 0; level < s->wavelet_depth; level++) {
827  SliceCoeffs *o = &c[level];
828  const SubBand *b = &s->plane[p].band[level][3]; /* orientation doens't matter */
829  o->top = b->height * y / s->num_y;
830  o->left = b->width * x / s->num_x;
831  o->tot_h = ((b->width * (x + 1)) / s->num_x) - o->left;
832  o->tot_v = ((b->height * (y + 1)) / s->num_y) - o->top;
833  o->tot = o->tot_h*o->tot_v;
834  coef += o->tot * (4 - !!level);
835  }
836  return coef;
837 }
838 
839 /**
840  * VC-2 Specification ->
841  * 13.5.3 hq_slice(sx,sy)
842  */
843 static int decode_hq_slice(const DiracContext *s, DiracSlice *slice, uint8_t *tmp_buf)
844 {
845  int i, level, orientation, quant_idx;
846  int qfactor[MAX_DWT_LEVELS][4], qoffset[MAX_DWT_LEVELS][4];
847  GetBitContext *gb = &slice->gb;
848  SliceCoeffs coeffs_num[MAX_DWT_LEVELS];
849 
850  skip_bits_long(gb, 8*s->highquality.prefix_bytes);
851  quant_idx = get_bits(gb, 8);
852 
853  if (quant_idx > DIRAC_MAX_QUANT_INDEX - 1) {
854  av_log(s->avctx, AV_LOG_ERROR, "Invalid quantization index - %i\n", quant_idx);
855  return AVERROR_INVALIDDATA;
856  }
857 
858  /* Slice quantization (slice_quantizers() in the specs) */
859  for (level = 0; level < s->wavelet_depth; level++) {
860  for (orientation = !!level; orientation < 4; orientation++) {
861  const int quant = FFMAX(quant_idx - s->lowdelay.quant[level][orientation], 0);
862  qfactor[level][orientation] = ff_dirac_qscale_tab[quant];
863  qoffset[level][orientation] = ff_dirac_qoffset_intra_tab[quant] + 2;
864  }
865  }
866 
867  /* Luma + 2 Chroma planes */
868  for (i = 0; i < 3; i++) {
869  int coef_num, coef_par, off = 0;
870  int64_t length = s->highquality.size_scaler*get_bits(gb, 8);
871  int64_t bits_end = get_bits_count(gb) + 8*length;
872  const uint8_t *addr = align_get_bits(gb);
873 
874  if (length*8 > get_bits_left(gb)) {
875  av_log(s->avctx, AV_LOG_ERROR, "end too far away\n");
876  return AVERROR_INVALIDDATA;
877  }
878 
879  coef_num = subband_coeffs(s, slice->slice_x, slice->slice_y, i, coeffs_num);
880 
881  if (s->pshift)
882  coef_par = ff_dirac_golomb_read_32bit(addr, length,
883  tmp_buf, coef_num);
884  else
885  coef_par = ff_dirac_golomb_read_16bit(addr, length,
886  tmp_buf, coef_num);
887 
888  if (coef_num > coef_par) {
889  const int start_b = coef_par * (1 << (s->pshift + 1));
890  const int end_b = coef_num * (1 << (s->pshift + 1));
891  memset(&tmp_buf[start_b], 0, end_b - start_b);
892  }
893 
894  for (level = 0; level < s->wavelet_depth; level++) {
895  const SliceCoeffs *c = &coeffs_num[level];
896  for (orientation = !!level; orientation < 4; orientation++) {
897  const SubBand *b1 = &s->plane[i].band[level][orientation];
898  uint8_t *buf = b1->ibuf + c->top * b1->stride + (c->left << (s->pshift + 1));
899 
900  /* Change to c->tot_h <= 4 for AVX2 dequantization */
901  const int qfunc = s->pshift + 2*(c->tot_h <= 2);
902  s->diracdsp.dequant_subband[qfunc](&tmp_buf[off], buf, b1->stride,
903  qfactor[level][orientation],
904  qoffset[level][orientation],
905  c->tot_v, c->tot_h);
906 
907  off += c->tot << (s->pshift + 1);
908  }
909  }
910 
911  skip_bits_long(gb, bits_end - get_bits_count(gb));
912  }
913 
914  return 0;
915 }
916 
917 static int decode_hq_slice_row(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
918 {
919  int i;
920  const DiracContext *s = avctx->priv_data;
921  DiracSlice *slices = ((DiracSlice *)arg) + s->num_x*jobnr;
922  uint8_t *thread_buf = &s->thread_buf[s->thread_buf_size*threadnr];
923  for (i = 0; i < s->num_x; i++)
924  decode_hq_slice(s, &slices[i], thread_buf);
925  return 0;
926 }
927 
928 /**
929  * Dirac Specification ->
930  * 13.5.1 low_delay_transform_data()
931  */
933 {
934  AVCodecContext *avctx = s->avctx;
935  int slice_x, slice_y, bufsize;
936  int64_t coef_buf_size, bytes = 0;
937  const uint8_t *buf;
938  DiracSlice *slices;
940  int slice_num = 0;
941 
942  if (s->slice_params_num_buf != (s->num_x * s->num_y)) {
943  s->slice_params_buf = av_realloc_f(s->slice_params_buf, s->num_x * s->num_y, sizeof(DiracSlice));
944  if (!s->slice_params_buf) {
945  av_log(s->avctx, AV_LOG_ERROR, "slice params buffer allocation failure\n");
946  s->slice_params_num_buf = 0;
947  return AVERROR(ENOMEM);
948  }
949  s->slice_params_num_buf = s->num_x * s->num_y;
950  }
951  slices = s->slice_params_buf;
952 
953  /* 8 becacuse that's how much the golomb reader could overread junk data
954  * from another plane/slice at most, and 512 because SIMD */
955  coef_buf_size = subband_coeffs(s, s->num_x - 1, s->num_y - 1, 0, tmp) + 8;
956  coef_buf_size = (coef_buf_size << (1 + s->pshift)) + 512;
957 
958  if (s->threads_num_buf != avctx->thread_count ||
959  s->thread_buf_size != coef_buf_size) {
960  s->threads_num_buf = avctx->thread_count;
961  s->thread_buf_size = coef_buf_size;
962  s->thread_buf = av_realloc_f(s->thread_buf, avctx->thread_count, s->thread_buf_size);
963  if (!s->thread_buf) {
964  av_log(s->avctx, AV_LOG_ERROR, "thread buffer allocation failure\n");
965  return AVERROR(ENOMEM);
966  }
967  }
968 
969  align_get_bits(&s->gb);
970  /*[DIRAC_STD] 13.5.2 Slices. slice(sx,sy) */
971  buf = s->gb.buffer + get_bits_count(&s->gb)/8;
972  bufsize = get_bits_left(&s->gb);
973 
974  if (s->hq_picture) {
975  int i;
976 
977  for (slice_y = 0; bufsize > 0 && slice_y < s->num_y; slice_y++) {
978  for (slice_x = 0; bufsize > 0 && slice_x < s->num_x; slice_x++) {
979  bytes = s->highquality.prefix_bytes + 1;
980  for (i = 0; i < 3; i++) {
981  if (bytes <= bufsize/8)
982  bytes += buf[bytes] * s->highquality.size_scaler + 1;
983  }
984  if (bytes >= INT_MAX || bytes*8 > bufsize) {
985  av_log(s->avctx, AV_LOG_ERROR, "too many bytes\n");
986  return AVERROR_INVALIDDATA;
987  }
988 
989  slices[slice_num].bytes = bytes;
990  slices[slice_num].slice_x = slice_x;
991  slices[slice_num].slice_y = slice_y;
992  init_get_bits(&slices[slice_num].gb, buf, bufsize);
993  slice_num++;
994 
995  buf += bytes;
996  if (bufsize/8 >= bytes)
997  bufsize -= bytes*8;
998  else
999  bufsize = 0;
1000  }
1001  }
1002 
1003  if (s->num_x*s->num_y != slice_num) {
1004  av_log(s->avctx, AV_LOG_ERROR, "too few slices\n");
1005  return AVERROR_INVALIDDATA;
1006  }
1007 
1008  avctx->execute2(avctx, decode_hq_slice_row, slices, NULL, s->num_y);
1009  } else {
1010  for (slice_y = 0; bufsize > 0 && slice_y < s->num_y; slice_y++) {
1011  for (slice_x = 0; bufsize > 0 && slice_x < s->num_x; slice_x++) {
1012  bytes = (slice_num+1) * (int64_t)s->lowdelay.bytes.num / s->lowdelay.bytes.den
1013  - slice_num * (int64_t)s->lowdelay.bytes.num / s->lowdelay.bytes.den;
1014  if (bytes >= INT_MAX || bytes*8 > bufsize) {
1015  av_log(s->avctx, AV_LOG_ERROR, "too many bytes\n");
1016  return AVERROR_INVALIDDATA;
1017  }
1018  slices[slice_num].bytes = bytes;
1019  slices[slice_num].slice_x = slice_x;
1020  slices[slice_num].slice_y = slice_y;
1021  init_get_bits(&slices[slice_num].gb, buf, bufsize);
1022  slice_num++;
1023 
1024  buf += bytes;
1025  if (bufsize/8 >= bytes)
1026  bufsize -= bytes*8;
1027  else
1028  bufsize = 0;
1029  }
1030  }
1031  avctx->execute(avctx, decode_lowdelay_slice, slices, NULL, slice_num,
1032  sizeof(DiracSlice)); /* [DIRAC_STD] 13.5.2 Slices */
1033  }
1034 
1035  if (s->dc_prediction) {
1036  if (s->pshift) {
1037  intra_dc_prediction_10(&s->plane[0].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */
1038  intra_dc_prediction_10(&s->plane[1].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */
1039  intra_dc_prediction_10(&s->plane[2].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */
1040  } else {
1041  intra_dc_prediction_8(&s->plane[0].band[0][0]);
1042  intra_dc_prediction_8(&s->plane[1].band[0][0]);
1043  intra_dc_prediction_8(&s->plane[2].band[0][0]);
1044  }
1045  }
1046 
1047  return 0;
1048 }
1049 
1051 {
1052  int i, w, h, level, orientation;
1053 
1054  for (i = 0; i < 3; i++) {
1055  Plane *p = &s->plane[i];
1056 
1057  p->width = s->seq.width >> (i ? s->chroma_x_shift : 0);
1058  p->height = s->seq.height >> (i ? s->chroma_y_shift : 0);
1059  p->idwt.width = w = CALC_PADDING(p->width , s->wavelet_depth);
1060  p->idwt.height = h = CALC_PADDING(p->height, s->wavelet_depth);
1061  p->idwt.stride = FFALIGN(p->idwt.width, 8) << (1 + s->pshift);
1062 
1063  for (level = s->wavelet_depth-1; level >= 0; level--) {
1064  w = w>>1;
1065  h = h>>1;
1066  for (orientation = !!level; orientation < 4; orientation++) {
1067  SubBand *b = &p->band[level][orientation];
1068 
1069  b->pshift = s->pshift;
1070  b->ibuf = p->idwt.buf;
1071  b->level = level;
1072  b->stride = p->idwt.stride << (s->wavelet_depth - level);
1073  b->width = w;
1074  b->height = h;
1075  b->orientation = orientation;
1076 
1077  if (orientation & 1)
1078  b->ibuf += w << (1+b->pshift);
1079  if (orientation > 1)
1080  b->ibuf += (b->stride>>1);
1081 
1082  if (level)
1083  b->parent = &p->band[level-1][orientation];
1084  }
1085  }
1086 
1087  if (i > 0) {
1088  p->xblen = s->plane[0].xblen >> s->chroma_x_shift;
1089  p->yblen = s->plane[0].yblen >> s->chroma_y_shift;
1090  p->xbsep = s->plane[0].xbsep >> s->chroma_x_shift;
1091  p->ybsep = s->plane[0].ybsep >> s->chroma_y_shift;
1092  }
1093 
1094  p->xoffset = (p->xblen - p->xbsep)/2;
1095  p->yoffset = (p->yblen - p->ybsep)/2;
1096  }
1097 }
1098 
1099 /**
1100  * Unpack the motion compensation parameters
1101  * Dirac Specification ->
1102  * 11.2 Picture prediction data. picture_prediction()
1103  */
1105 {
1106  static const uint8_t default_blen[] = { 4, 12, 16, 24 };
1107 
1108  GetBitContext *gb = &s->gb;
1109  unsigned idx, ref;
1110 
1111  align_get_bits(gb);
1112  /* [DIRAC_STD] 11.2.2 Block parameters. block_parameters() */
1113  /* Luma and Chroma are equal. 11.2.3 */
1114  idx = get_interleaved_ue_golomb(gb); /* [DIRAC_STD] index */
1115 
1116  if (idx > 4) {
1117  av_log(s->avctx, AV_LOG_ERROR, "Block prediction index too high\n");
1118  return AVERROR_INVALIDDATA;
1119  }
1120 
1121  if (idx == 0) {
1122  s->plane[0].xblen = get_interleaved_ue_golomb(gb);
1123  s->plane[0].yblen = get_interleaved_ue_golomb(gb);
1124  s->plane[0].xbsep = get_interleaved_ue_golomb(gb);
1125  s->plane[0].ybsep = get_interleaved_ue_golomb(gb);
1126  } else {
1127  /*[DIRAC_STD] preset_block_params(index). Table 11.1 */
1128  s->plane[0].xblen = default_blen[idx-1];
1129  s->plane[0].yblen = default_blen[idx-1];
1130  s->plane[0].xbsep = 4 * idx;
1131  s->plane[0].ybsep = 4 * idx;
1132  }
1133  /*[DIRAC_STD] 11.2.4 motion_data_dimensions()
1134  Calculated in function dirac_unpack_block_motion_data */
1135 
1136  if (s->plane[0].xblen % (1 << s->chroma_x_shift) != 0 ||
1137  s->plane[0].yblen % (1 << s->chroma_y_shift) != 0 ||
1138  !s->plane[0].xblen || !s->plane[0].yblen) {
1139  av_log(s->avctx, AV_LOG_ERROR,
1140  "invalid x/y block length (%d/%d) for x/y chroma shift (%d/%d)\n",
1141  s->plane[0].xblen, s->plane[0].yblen, s->chroma_x_shift, s->chroma_y_shift);
1142  return AVERROR_INVALIDDATA;
1143  }
1144  if (!s->plane[0].xbsep || !s->plane[0].ybsep || s->plane[0].xbsep < s->plane[0].xblen/2 || s->plane[0].ybsep < s->plane[0].yblen/2) {
1145  av_log(s->avctx, AV_LOG_ERROR, "Block separation too small\n");
1146  return AVERROR_INVALIDDATA;
1147  }
1148  if (s->plane[0].xbsep > s->plane[0].xblen || s->plane[0].ybsep > s->plane[0].yblen) {
1149  av_log(s->avctx, AV_LOG_ERROR, "Block separation greater than size\n");
1150  return AVERROR_INVALIDDATA;
1151  }
1152  if (FFMAX(s->plane[0].xblen, s->plane[0].yblen) > MAX_BLOCKSIZE) {
1153  av_log(s->avctx, AV_LOG_ERROR, "Unsupported large block size\n");
1154  return AVERROR_PATCHWELCOME;
1155  }
1156 
1157  /*[DIRAC_STD] 11.2.5 Motion vector precision. motion_vector_precision()
1158  Read motion vector precision */
1159  s->mv_precision = get_interleaved_ue_golomb(gb);
1160  if (s->mv_precision > 3) {
1161  av_log(s->avctx, AV_LOG_ERROR, "MV precision finer than eighth-pel\n");
1162  return AVERROR_INVALIDDATA;
1163  }
1164 
1165  /*[DIRAC_STD] 11.2.6 Global motion. global_motion()
1166  Read the global motion compensation parameters */
1167  s->globalmc_flag = get_bits1(gb);
1168  if (s->globalmc_flag) {
1169  memset(s->globalmc, 0, sizeof(s->globalmc));
1170  /* [DIRAC_STD] pan_tilt(gparams) */
1171  for (ref = 0; ref < s->num_refs; ref++) {
1172  if (get_bits1(gb)) {
1173  s->globalmc[ref].pan_tilt[0] = dirac_get_se_golomb(gb);
1174  s->globalmc[ref].pan_tilt[1] = dirac_get_se_golomb(gb);
1175  }
1176  /* [DIRAC_STD] zoom_rotate_shear(gparams)
1177  zoom/rotation/shear parameters */
1178  if (get_bits1(gb)) {
1179  s->globalmc[ref].zrs_exp = get_interleaved_ue_golomb(gb);
1180  s->globalmc[ref].zrs[0][0] = dirac_get_se_golomb(gb);
1181  s->globalmc[ref].zrs[0][1] = dirac_get_se_golomb(gb);
1182  s->globalmc[ref].zrs[1][0] = dirac_get_se_golomb(gb);
1183  s->globalmc[ref].zrs[1][1] = dirac_get_se_golomb(gb);
1184  } else {
1185  s->globalmc[ref].zrs[0][0] = 1;
1186  s->globalmc[ref].zrs[1][1] = 1;
1187  }
1188  /* [DIRAC_STD] perspective(gparams) */
1189  if (get_bits1(gb)) {
1190  s->globalmc[ref].perspective_exp = get_interleaved_ue_golomb(gb);
1191  s->globalmc[ref].perspective[0] = dirac_get_se_golomb(gb);
1192  s->globalmc[ref].perspective[1] = dirac_get_se_golomb(gb);
1193  }
1194  if (s->globalmc[ref].perspective_exp + (uint64_t)s->globalmc[ref].zrs_exp > 30) {
1195  return AVERROR_INVALIDDATA;
1196  }
1197 
1198  }
1199  }
1200 
1201  /*[DIRAC_STD] 11.2.7 Picture prediction mode. prediction_mode()
1202  Picture prediction mode, not currently used. */
1203  if (get_interleaved_ue_golomb(gb)) {
1204  av_log(s->avctx, AV_LOG_ERROR, "Unknown picture prediction mode\n");
1205  return AVERROR_INVALIDDATA;
1206  }
1207 
1208  /* [DIRAC_STD] 11.2.8 Reference picture weight. reference_picture_weights()
1209  just data read, weight calculation will be done later on. */
1210  s->weight_log2denom = 1;
1211  s->weight[0] = 1;
1212  s->weight[1] = 1;
1213 
1214  if (get_bits1(gb)) {
1215  s->weight_log2denom = get_interleaved_ue_golomb(gb);
1216  if (s->weight_log2denom < 1 || s->weight_log2denom > 8) {
1217  av_log(s->avctx, AV_LOG_ERROR, "weight_log2denom unsupported or invalid\n");
1218  s->weight_log2denom = 1;
1219  return AVERROR_INVALIDDATA;
1220  }
1221  s->weight[0] = dirac_get_se_golomb(gb);
1222  if (s->num_refs == 2)
1223  s->weight[1] = dirac_get_se_golomb(gb);
1224  }
1225  return 0;
1226 }
1227 
1228 /**
1229  * Dirac Specification ->
1230  * 11.3 Wavelet transform data. wavelet_transform()
1231  */
1233 {
1234  GetBitContext *gb = &s->gb;
1235  int i, level;
1236  unsigned tmp;
1237 
1238 #define CHECKEDREAD(dst, cond, errmsg) \
1239  tmp = get_interleaved_ue_golomb(gb); \
1240  if (cond) { \
1241  av_log(s->avctx, AV_LOG_ERROR, errmsg); \
1242  return AVERROR_INVALIDDATA; \
1243  }\
1244  dst = tmp;
1245 
1246  align_get_bits(gb);
1247 
1248  s->zero_res = s->num_refs ? get_bits1(gb) : 0;
1249  if (s->zero_res)
1250  return 0;
1251 
1252  /*[DIRAC_STD] 11.3.1 Transform parameters. transform_parameters() */
1253  CHECKEDREAD(s->wavelet_idx, tmp > 6, "wavelet_idx is too big\n")
1254 
1255  CHECKEDREAD(s->wavelet_depth, tmp > MAX_DWT_LEVELS || tmp < 1, "invalid number of DWT decompositions\n")
1256 
1257  if (!s->low_delay) {
1258  /* Codeblock parameters (core syntax only) */
1259  if (get_bits1(gb)) {
1260  for (i = 0; i <= s->wavelet_depth; i++) {
1261  CHECKEDREAD(s->codeblock[i].width , tmp < 1 || tmp > (s->avctx->width >>s->wavelet_depth-i), "codeblock width invalid\n")
1262  CHECKEDREAD(s->codeblock[i].height, tmp < 1 || tmp > (s->avctx->height>>s->wavelet_depth-i), "codeblock height invalid\n")
1263  }
1264 
1265  CHECKEDREAD(s->codeblock_mode, tmp > 1, "unknown codeblock mode\n")
1266  }
1267  else {
1268  for (i = 0; i <= s->wavelet_depth; i++)
1269  s->codeblock[i].width = s->codeblock[i].height = 1;
1270  }
1271  }
1272  else {
1273  s->num_x = get_interleaved_ue_golomb(gb);
1274  s->num_y = get_interleaved_ue_golomb(gb);
1275  if (s->num_x * s->num_y == 0 || s->num_x * (uint64_t)s->num_y > INT_MAX ||
1276  s->num_x * (uint64_t)s->avctx->width > INT_MAX ||
1277  s->num_y * (uint64_t)s->avctx->height > INT_MAX ||
1278  s->num_x > s->avctx->width ||
1279  s->num_y > s->avctx->height
1280  ) {
1281  av_log(s->avctx,AV_LOG_ERROR,"Invalid numx/y\n");
1282  s->num_x = s->num_y = 0;
1283  return AVERROR_INVALIDDATA;
1284  }
1285  if (s->ld_picture) {
1286  s->lowdelay.bytes.num = get_interleaved_ue_golomb(gb);
1287  s->lowdelay.bytes.den = get_interleaved_ue_golomb(gb);
1288  if (s->lowdelay.bytes.den <= 0) {
1289  av_log(s->avctx,AV_LOG_ERROR,"Invalid lowdelay.bytes.den\n");
1290  return AVERROR_INVALIDDATA;
1291  }
1292  } else if (s->hq_picture) {
1293  s->highquality.prefix_bytes = get_interleaved_ue_golomb(gb);
1294  s->highquality.size_scaler = get_interleaved_ue_golomb(gb);
1295  if (s->highquality.prefix_bytes >= INT_MAX / 8) {
1296  av_log(s->avctx,AV_LOG_ERROR,"too many prefix bytes\n");
1297  return AVERROR_INVALIDDATA;
1298  }
1299  }
1300 
1301  /* [DIRAC_STD] 11.3.5 Quantisation matrices (low-delay syntax). quant_matrix() */
1302  if (get_bits1(gb)) {
1303  av_log(s->avctx,AV_LOG_DEBUG,"Low Delay: Has Custom Quantization Matrix!\n");
1304  /* custom quantization matrix */
1305  for (level = 0; level < s->wavelet_depth; level++) {
1306  for (i = !!level; i < 4; i++) {
1307  s->lowdelay.quant[level][i] = get_interleaved_ue_golomb(gb);
1308  }
1309  }
1310  } else {
1311  if (s->wavelet_depth > 4) {
1312  av_log(s->avctx,AV_LOG_ERROR,"Mandatory custom low delay matrix missing for depth %d\n", s->wavelet_depth);
1313  return AVERROR_INVALIDDATA;
1314  }
1315  /* default quantization matrix */
1316  for (level = 0; level < s->wavelet_depth; level++)
1317  for (i = 0; i < 4; i++) {
1318  s->lowdelay.quant[level][i] = ff_dirac_default_qmat[s->wavelet_idx][level][i];
1319  /* haar with no shift differs for different depths */
1320  if (s->wavelet_idx == 3)
1321  s->lowdelay.quant[level][i] += 4*(s->wavelet_depth-1 - level);
1322  }
1323  }
1324  }
1325  return 0;
1326 }
1327 
1328 static inline int pred_sbsplit(uint8_t *sbsplit, int stride, int x, int y)
1329 {
1330  static const uint8_t avgsplit[7] = { 0, 0, 1, 1, 1, 2, 2 };
1331 
1332  if (!(x|y))
1333  return 0;
1334  else if (!y)
1335  return sbsplit[-1];
1336  else if (!x)
1337  return sbsplit[-stride];
1338 
1339  return avgsplit[sbsplit[-1] + sbsplit[-stride] + sbsplit[-stride-1]];
1340 }
1341 
1342 static inline int pred_block_mode(DiracBlock *block, int stride, int x, int y, int refmask)
1343 {
1344  int pred;
1345 
1346  if (!(x|y))
1347  return 0;
1348  else if (!y)
1349  return block[-1].ref & refmask;
1350  else if (!x)
1351  return block[-stride].ref & refmask;
1352 
1353  /* return the majority */
1354  pred = (block[-1].ref & refmask) + (block[-stride].ref & refmask) + (block[-stride-1].ref & refmask);
1355  return (pred >> 1) & refmask;
1356 }
1357 
1358 static inline void pred_block_dc(DiracBlock *block, int stride, int x, int y)
1359 {
1360  int i, n = 0;
1361 
1362  memset(block->u.dc, 0, sizeof(block->u.dc));
1363 
1364  if (x && !(block[-1].ref & 3)) {
1365  for (i = 0; i < 3; i++)
1366  block->u.dc[i] += block[-1].u.dc[i];
1367  n++;
1368  }
1369 
1370  if (y && !(block[-stride].ref & 3)) {
1371  for (i = 0; i < 3; i++)
1372  block->u.dc[i] += block[-stride].u.dc[i];
1373  n++;
1374  }
1375 
1376  if (x && y && !(block[-1-stride].ref & 3)) {
1377  for (i = 0; i < 3; i++)
1378  block->u.dc[i] += block[-1-stride].u.dc[i];
1379  n++;
1380  }
1381 
1382  if (n == 2) {
1383  for (i = 0; i < 3; i++)
1384  block->u.dc[i] = (block->u.dc[i]+1)>>1;
1385  } else if (n == 3) {
1386  for (i = 0; i < 3; i++)
1387  block->u.dc[i] = divide3(block->u.dc[i]);
1388  }
1389 }
1390 
1391 static inline void pred_mv(DiracBlock *block, int stride, int x, int y, int ref)
1392 {
1393  int16_t *pred[3];
1394  int refmask = ref+1;
1395  int mask = refmask | DIRAC_REF_MASK_GLOBAL; /* exclude gmc blocks */
1396  int n = 0;
1397 
1398  if (x && (block[-1].ref & mask) == refmask)
1399  pred[n++] = block[-1].u.mv[ref];
1400 
1401  if (y && (block[-stride].ref & mask) == refmask)
1402  pred[n++] = block[-stride].u.mv[ref];
1403 
1404  if (x && y && (block[-stride-1].ref & mask) == refmask)
1405  pred[n++] = block[-stride-1].u.mv[ref];
1406 
1407  switch (n) {
1408  case 0:
1409  block->u.mv[ref][0] = 0;
1410  block->u.mv[ref][1] = 0;
1411  break;
1412  case 1:
1413  block->u.mv[ref][0] = pred[0][0];
1414  block->u.mv[ref][1] = pred[0][1];
1415  break;
1416  case 2:
1417  block->u.mv[ref][0] = (pred[0][0] + pred[1][0] + 1) >> 1;
1418  block->u.mv[ref][1] = (pred[0][1] + pred[1][1] + 1) >> 1;
1419  break;
1420  case 3:
1421  block->u.mv[ref][0] = mid_pred(pred[0][0], pred[1][0], pred[2][0]);
1422  block->u.mv[ref][1] = mid_pred(pred[0][1], pred[1][1], pred[2][1]);
1423  break;
1424  }
1425 }
1426 
1427 static void global_mv(DiracContext *s, DiracBlock *block, int x, int y, int ref)
1428 {
1429  int ez = s->globalmc[ref].zrs_exp;
1430  int ep = s->globalmc[ref].perspective_exp;
1431  int (*A)[2] = s->globalmc[ref].zrs;
1432  int *b = s->globalmc[ref].pan_tilt;
1433  int *c = s->globalmc[ref].perspective;
1434 
1435  int64_t m = (1<<ep) - (c[0]*(int64_t)x + c[1]*(int64_t)y);
1436  int64_t mx = m * (uint64_t)((A[0][0] * (int64_t)x + A[0][1]*(int64_t)y) + (1LL<<ez) * b[0]);
1437  int64_t my = m * (uint64_t)((A[1][0] * (int64_t)x + A[1][1]*(int64_t)y) + (1LL<<ez) * b[1]);
1438 
1439  block->u.mv[ref][0] = (mx + (1<<(ez+ep))) >> (ez+ep);
1440  block->u.mv[ref][1] = (my + (1<<(ez+ep))) >> (ez+ep);
1441 }
1442 
1444  int stride, int x, int y)
1445 {
1446  int i;
1447 
1449  block->ref ^= dirac_get_arith_bit(arith, CTX_PMODE_REF1);
1450 
1451  if (s->num_refs == 2) {
1453  block->ref ^= dirac_get_arith_bit(arith, CTX_PMODE_REF2) << 1;
1454  }
1455 
1456  if (!block->ref) {
1457  pred_block_dc(block, stride, x, y);
1458  for (i = 0; i < 3; i++)
1459  block->u.dc[i] += (unsigned)dirac_get_arith_int(arith+1+i, CTX_DC_F1, CTX_DC_DATA);
1460  return;
1461  }
1462 
1463  if (s->globalmc_flag) {
1465  block->ref ^= dirac_get_arith_bit(arith, CTX_GLOBAL_BLOCK) << 2;
1466  }
1467 
1468  for (i = 0; i < s->num_refs; i++)
1469  if (block->ref & (i+1)) {
1470  if (block->ref & DIRAC_REF_MASK_GLOBAL) {
1471  global_mv(s, block, x, y, i);
1472  } else {
1473  pred_mv(block, stride, x, y, i);
1474  block->u.mv[i][0] += (unsigned)dirac_get_arith_int(arith + 4 + 2 * i, CTX_MV_F1, CTX_MV_DATA);
1475  block->u.mv[i][1] += (unsigned)dirac_get_arith_int(arith + 5 + 2 * i, CTX_MV_F1, CTX_MV_DATA);
1476  }
1477  }
1478 }
1479 
1480 /**
1481  * Copies the current block to the other blocks covered by the current superblock split mode
1482  */
1484 {
1485  int x, y;
1486  DiracBlock *dst = block;
1487 
1488  for (x = 1; x < size; x++)
1489  dst[x] = *block;
1490 
1491  for (y = 1; y < size; y++) {
1492  dst += stride;
1493  for (x = 0; x < size; x++)
1494  dst[x] = *block;
1495  }
1496 }
1497 
1498 /**
1499  * Dirac Specification ->
1500  * 12. Block motion data syntax
1501  */
1503 {
1504  GetBitContext *gb = &s->gb;
1505  uint8_t *sbsplit = s->sbsplit;
1506  int i, x, y, q, p;
1507  DiracArith arith[8];
1508 
1509  align_get_bits(gb);
1510 
1511  /* [DIRAC_STD] 11.2.4 and 12.2.1 Number of blocks and superblocks */
1512  s->sbwidth = DIVRNDUP(s->seq.width, 4*s->plane[0].xbsep);
1513  s->sbheight = DIVRNDUP(s->seq.height, 4*s->plane[0].ybsep);
1514  s->blwidth = 4 * s->sbwidth;
1515  s->blheight = 4 * s->sbheight;
1516 
1517  /* [DIRAC_STD] 12.3.1 Superblock splitting modes. superblock_split_modes()
1518  decode superblock split modes */
1519  ff_dirac_init_arith_decoder(arith, gb, get_interleaved_ue_golomb(gb)); /* get_interleaved_ue_golomb(gb) is the length */
1520  for (y = 0; y < s->sbheight; y++) {
1521  for (x = 0; x < s->sbwidth; x++) {
1522  unsigned int split = dirac_get_arith_uint(arith, CTX_SB_F1, CTX_SB_DATA);
1523  if (split > 2)
1524  return AVERROR_INVALIDDATA;
1525  sbsplit[x] = (split + pred_sbsplit(sbsplit+x, s->sbwidth, x, y)) % 3;
1526  }
1527  sbsplit += s->sbwidth;
1528  }
1529 
1530  /* setup arith decoding */
1532  for (i = 0; i < s->num_refs; i++) {
1533  ff_dirac_init_arith_decoder(arith + 4 + 2 * i, gb, get_interleaved_ue_golomb(gb));
1534  ff_dirac_init_arith_decoder(arith + 5 + 2 * i, gb, get_interleaved_ue_golomb(gb));
1535  }
1536  for (i = 0; i < 3; i++)
1538 
1539  for (y = 0; y < s->sbheight; y++)
1540  for (x = 0; x < s->sbwidth; x++) {
1541  int blkcnt = 1 << s->sbsplit[y * s->sbwidth + x];
1542  int step = 4 >> s->sbsplit[y * s->sbwidth + x];
1543 
1544  for (q = 0; q < blkcnt; q++)
1545  for (p = 0; p < blkcnt; p++) {
1546  int bx = 4 * x + p*step;
1547  int by = 4 * y + q*step;
1548  DiracBlock *block = &s->blmotion[by*s->blwidth + bx];
1549  decode_block_params(s, arith, block, s->blwidth, bx, by);
1550  propagate_block_data(block, s->blwidth, step);
1551  }
1552  }
1553 
1554  for (i = 0; i < 4 + 2*s->num_refs; i++) {
1555  if (arith[i].error)
1556  return arith[i].error;
1557  }
1558 
1559  return 0;
1560 }
1561 
1562 static int weight(int i, int blen, int offset)
1563 {
1564 #define ROLLOFF(i) offset == 1 ? ((i) ? 5 : 3) : \
1565  (1 + (6*(i) + offset - 1) / (2*offset - 1))
1566 
1567  if (i < 2*offset)
1568  return ROLLOFF(i);
1569  else if (i > blen-1 - 2*offset)
1570  return ROLLOFF(blen-1 - i);
1571  return 8;
1572 }
1573 
1574 static void init_obmc_weight_row(Plane *p, uint8_t *obmc_weight, int stride,
1575  int left, int right, int wy)
1576 {
1577  int x;
1578  for (x = 0; left && x < p->xblen >> 1; x++)
1579  obmc_weight[x] = wy*8;
1580  for (; x < p->xblen >> right; x++)
1581  obmc_weight[x] = wy*weight(x, p->xblen, p->xoffset);
1582  for (; x < p->xblen; x++)
1583  obmc_weight[x] = wy*8;
1584  for (; x < stride; x++)
1585  obmc_weight[x] = 0;
1586 }
1587 
1588 static void init_obmc_weight(Plane *p, uint8_t *obmc_weight, int stride,
1589  int left, int right, int top, int bottom)
1590 {
1591  int y;
1592  for (y = 0; top && y < p->yblen >> 1; y++) {
1593  init_obmc_weight_row(p, obmc_weight, stride, left, right, 8);
1594  obmc_weight += stride;
1595  }
1596  for (; y < p->yblen >> bottom; y++) {
1597  int wy = weight(y, p->yblen, p->yoffset);
1598  init_obmc_weight_row(p, obmc_weight, stride, left, right, wy);
1599  obmc_weight += stride;
1600  }
1601  for (; y < p->yblen; y++) {
1602  init_obmc_weight_row(p, obmc_weight, stride, left, right, 8);
1603  obmc_weight += stride;
1604  }
1605 }
1606 
1607 static void init_obmc_weights(DiracContext *s, Plane *p, int by)
1608 {
1609  int top = !by;
1610  int bottom = by == s->blheight-1;
1611 
1612  /* don't bother re-initing for rows 2 to blheight-2, the weights don't change */
1613  if (top || bottom || by == 1) {
1614  init_obmc_weight(p, s->obmc_weight[0], MAX_BLOCKSIZE, 1, 0, top, bottom);
1615  init_obmc_weight(p, s->obmc_weight[1], MAX_BLOCKSIZE, 0, 0, top, bottom);
1616  init_obmc_weight(p, s->obmc_weight[2], MAX_BLOCKSIZE, 0, 1, top, bottom);
1617  }
1618 }
1619 
1620 static const uint8_t epel_weights[4][4][4] = {
1621  {{ 16, 0, 0, 0 },
1622  { 12, 4, 0, 0 },
1623  { 8, 8, 0, 0 },
1624  { 4, 12, 0, 0 }},
1625  {{ 12, 0, 4, 0 },
1626  { 9, 3, 3, 1 },
1627  { 6, 6, 2, 2 },
1628  { 3, 9, 1, 3 }},
1629  {{ 8, 0, 8, 0 },
1630  { 6, 2, 6, 2 },
1631  { 4, 4, 4, 4 },
1632  { 2, 6, 2, 6 }},
1633  {{ 4, 0, 12, 0 },
1634  { 3, 1, 9, 3 },
1635  { 2, 2, 6, 6 },
1636  { 1, 3, 3, 9 }}
1637 };
1638 
1639 /**
1640  * For block x,y, determine which of the hpel planes to do bilinear
1641  * interpolation from and set src[] to the location in each hpel plane
1642  * to MC from.
1643  *
1644  * @return the index of the put_dirac_pixels_tab function to use
1645  * 0 for 1 plane (fpel,hpel), 1 for 2 planes (qpel), 2 for 4 planes (qpel), and 3 for epel
1646  */
1647 static int mc_subpel(DiracContext *s, DiracBlock *block, const uint8_t *src[5],
1648  int x, int y, int ref, int plane)
1649 {
1650  Plane *p = &s->plane[plane];
1651  uint8_t **ref_hpel = s->ref_pics[ref]->hpel[plane];
1652  int motion_x = block->u.mv[ref][0];
1653  int motion_y = block->u.mv[ref][1];
1654  int mx, my, i, epel, nplanes = 0;
1655 
1656  if (plane) {
1657  motion_x >>= s->chroma_x_shift;
1658  motion_y >>= s->chroma_y_shift;
1659  }
1660 
1661  mx = motion_x & ~(-1U << s->mv_precision);
1662  my = motion_y & ~(-1U << s->mv_precision);
1663  motion_x >>= s->mv_precision;
1664  motion_y >>= s->mv_precision;
1665  /* normalize subpel coordinates to epel */
1666  /* TODO: template this function? */
1667  mx <<= 3 - s->mv_precision;
1668  my <<= 3 - s->mv_precision;
1669 
1670  x += motion_x;
1671  y += motion_y;
1672  epel = (mx|my)&1;
1673 
1674  /* hpel position */
1675  if (!((mx|my)&3)) {
1676  nplanes = 1;
1677  src[0] = ref_hpel[(my>>1)+(mx>>2)] + y*p->stride + x;
1678  } else {
1679  /* qpel or epel */
1680  nplanes = 4;
1681  for (i = 0; i < 4; i++)
1682  src[i] = ref_hpel[i] + y*p->stride + x;
1683 
1684  /* if we're interpolating in the right/bottom halves, adjust the planes as needed
1685  we increment x/y because the edge changes for half of the pixels */
1686  if (mx > 4) {
1687  src[0] += 1;
1688  src[2] += 1;
1689  x++;
1690  }
1691  if (my > 4) {
1692  src[0] += p->stride;
1693  src[1] += p->stride;
1694  y++;
1695  }
1696 
1697  /* hpel planes are:
1698  [0]: F [1]: H
1699  [2]: V [3]: C */
1700  if (!epel) {
1701  /* check if we really only need 2 planes since either mx or my is
1702  a hpel position. (epel weights of 0 handle this there) */
1703  if (!(mx&3)) {
1704  /* mx == 0: average [0] and [2]
1705  mx == 4: average [1] and [3] */
1706  src[!mx] = src[2 + !!mx];
1707  nplanes = 2;
1708  } else if (!(my&3)) {
1709  src[0] = src[(my>>1) ];
1710  src[1] = src[(my>>1)+1];
1711  nplanes = 2;
1712  }
1713  } else {
1714  /* adjust the ordering if needed so the weights work */
1715  if (mx > 4) {
1716  FFSWAP(const uint8_t *, src[0], src[1]);
1717  FFSWAP(const uint8_t *, src[2], src[3]);
1718  }
1719  if (my > 4) {
1720  FFSWAP(const uint8_t *, src[0], src[2]);
1721  FFSWAP(const uint8_t *, src[1], src[3]);
1722  }
1723  src[4] = epel_weights[my&3][mx&3];
1724  }
1725  }
1726 
1727  /* fixme: v/h _edge_pos */
1728  if (x + p->xblen > p->width +EDGE_WIDTH/2 ||
1729  y + p->yblen > p->height+EDGE_WIDTH/2 ||
1730  x < 0 || y < 0) {
1731  for (i = 0; i < nplanes; i++) {
1732  s->vdsp.emulated_edge_mc(s->edge_emu_buffer[i], src[i],
1733  p->stride, p->stride,
1734  p->xblen, p->yblen, x, y,
1735  p->width+EDGE_WIDTH/2, p->height+EDGE_WIDTH/2);
1736  src[i] = s->edge_emu_buffer[i];
1737  }
1738  }
1739  return (nplanes>>1) + epel;
1740 }
1741 
1742 static void add_dc(uint16_t *dst, int dc, int stride,
1743  uint8_t *obmc_weight, int xblen, int yblen)
1744 {
1745  int x, y;
1746  dc += 128;
1747 
1748  for (y = 0; y < yblen; y++) {
1749  for (x = 0; x < xblen; x += 2) {
1750  dst[x ] += dc * obmc_weight[x ];
1751  dst[x+1] += dc * obmc_weight[x+1];
1752  }
1753  dst += stride;
1754  obmc_weight += MAX_BLOCKSIZE;
1755  }
1756 }
1757 
1759  uint16_t *mctmp, uint8_t *obmc_weight,
1760  int plane, int dstx, int dsty)
1761 {
1762  Plane *p = &s->plane[plane];
1763  const uint8_t *src[5];
1764  int idx;
1765 
1766  switch (block->ref&3) {
1767  case 0: /* DC */
1768  add_dc(mctmp, block->u.dc[plane], p->stride, obmc_weight, p->xblen, p->yblen);
1769  return;
1770  case 1:
1771  case 2:
1772  idx = mc_subpel(s, block, src, dstx, dsty, (block->ref&3)-1, plane);
1773  s->put_pixels_tab[idx](s->mcscratch, src, p->stride, p->yblen);
1774  if (s->weight_func)
1775  s->weight_func(s->mcscratch, p->stride, s->weight_log2denom,
1776  s->weight[0] + s->weight[1], p->yblen);
1777  break;
1778  case 3:
1779  idx = mc_subpel(s, block, src, dstx, dsty, 0, plane);
1780  s->put_pixels_tab[idx](s->mcscratch, src, p->stride, p->yblen);
1781  idx = mc_subpel(s, block, src, dstx, dsty, 1, plane);
1782  if (s->biweight_func) {
1783  /* fixme: +32 is a quick hack */
1784  s->put_pixels_tab[idx](s->mcscratch + 32, src, p->stride, p->yblen);
1785  s->biweight_func(s->mcscratch, s->mcscratch+32, p->stride, s->weight_log2denom,
1786  s->weight[0], s->weight[1], p->yblen);
1787  } else
1788  s->avg_pixels_tab[idx](s->mcscratch, src, p->stride, p->yblen);
1789  break;
1790  }
1791  s->add_obmc(mctmp, s->mcscratch, p->stride, obmc_weight, p->yblen);
1792 }
1793 
1794 static void mc_row(DiracContext *s, DiracBlock *block, uint16_t *mctmp, int plane, int dsty)
1795 {
1796  Plane *p = &s->plane[plane];
1797  int x, dstx = p->xbsep - p->xoffset;
1798 
1799  block_mc(s, block, mctmp, s->obmc_weight[0], plane, -p->xoffset, dsty);
1800  mctmp += p->xbsep;
1801 
1802  for (x = 1; x < s->blwidth-1; x++) {
1803  block_mc(s, block+x, mctmp, s->obmc_weight[1], plane, dstx, dsty);
1804  dstx += p->xbsep;
1805  mctmp += p->xbsep;
1806  }
1807  block_mc(s, block+x, mctmp, s->obmc_weight[2], plane, dstx, dsty);
1808 }
1809 
1810 static void select_dsp_funcs(DiracContext *s, int width, int height, int xblen, int yblen)
1811 {
1812  int idx = 0;
1813  if (xblen > 8)
1814  idx = 1;
1815  if (xblen > 16)
1816  idx = 2;
1817 
1818  memcpy(s->put_pixels_tab, s->diracdsp.put_dirac_pixels_tab[idx], sizeof(s->put_pixels_tab));
1819  memcpy(s->avg_pixels_tab, s->diracdsp.avg_dirac_pixels_tab[idx], sizeof(s->avg_pixels_tab));
1820  s->add_obmc = s->diracdsp.add_dirac_obmc[idx];
1821  if (s->weight_log2denom > 1 || s->weight[0] != 1 || s->weight[1] != 1) {
1822  s->weight_func = s->diracdsp.weight_dirac_pixels_tab[idx];
1823  s->biweight_func = s->diracdsp.biweight_dirac_pixels_tab[idx];
1824  } else {
1825  s->weight_func = NULL;
1826  s->biweight_func = NULL;
1827  }
1828 }
1829 
1830 static int interpolate_refplane(DiracContext *s, DiracFrame *ref, int plane, int width, int height)
1831 {
1832  /* chroma allocates an edge of 8 when subsampled
1833  which for 4:2:2 means an h edge of 16 and v edge of 8
1834  just use 8 for everything for the moment */
1835  int i, edge = EDGE_WIDTH/2;
1836 
1837  ref->hpel[plane][0] = ref->avframe->data[plane];
1838  s->mpvencdsp.draw_edges(ref->hpel[plane][0], ref->avframe->linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM); /* EDGE_TOP | EDGE_BOTTOM values just copied to make it build, this needs to be ensured */
1839 
1840  /* no need for hpel if we only have fpel vectors */
1841  if (!s->mv_precision)
1842  return 0;
1843 
1844  for (i = 1; i < 4; i++) {
1845  if (!ref->hpel_base[plane][i])
1846  ref->hpel_base[plane][i] = av_malloc((height+2*edge) * ref->avframe->linesize[plane] + 32);
1847  if (!ref->hpel_base[plane][i]) {
1848  return AVERROR(ENOMEM);
1849  }
1850  /* we need to be 16-byte aligned even for chroma */
1851  ref->hpel[plane][i] = ref->hpel_base[plane][i] + edge*ref->avframe->linesize[plane] + 16;
1852  }
1853 
1854  if (!ref->interpolated[plane]) {
1855  s->diracdsp.dirac_hpel_filter(ref->hpel[plane][1], ref->hpel[plane][2],
1856  ref->hpel[plane][3], ref->hpel[plane][0],
1857  ref->avframe->linesize[plane], width, height);
1858  s->mpvencdsp.draw_edges(ref->hpel[plane][1], ref->avframe->linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM);
1859  s->mpvencdsp.draw_edges(ref->hpel[plane][2], ref->avframe->linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM);
1860  s->mpvencdsp.draw_edges(ref->hpel[plane][3], ref->avframe->linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM);
1861  }
1862  ref->interpolated[plane] = 1;
1863 
1864  return 0;
1865 }
1866 
1867 /**
1868  * Dirac Specification ->
1869  * 13.0 Transform data syntax. transform_data()
1870  */
1872 {
1873  DWTContext d;
1874  int y, i, comp, dsty;
1875  int ret;
1876 
1877  if (s->low_delay) {
1878  /* [DIRAC_STD] 13.5.1 low_delay_transform_data() */
1879  if (!s->hq_picture) {
1880  for (comp = 0; comp < 3; comp++) {
1881  Plane *p = &s->plane[comp];
1882  memset(p->idwt.buf, 0, p->idwt.stride * p->idwt.height);
1883  }
1884  }
1885  if (!s->zero_res) {
1886  if ((ret = decode_lowdelay(s)) < 0)
1887  return ret;
1888  }
1889  }
1890 
1891  for (comp = 0; comp < 3; comp++) {
1892  Plane *p = &s->plane[comp];
1893  uint8_t *frame = s->current_picture->avframe->data[comp];
1894 
1895  /* FIXME: small resolutions */
1896  for (i = 0; i < 4; i++)
1897  s->edge_emu_buffer[i] = s->edge_emu_buffer_base + i*FFALIGN(p->width, 16);
1898 
1899  if (!s->zero_res && !s->low_delay)
1900  {
1901  memset(p->idwt.buf, 0, p->idwt.stride * p->idwt.height);
1902  ret = decode_component(s, comp); /* [DIRAC_STD] 13.4.1 core_transform_data() */
1903  if (ret < 0)
1904  return ret;
1905  }
1906  ret = ff_spatial_idwt_init(&d, &p->idwt, s->wavelet_idx+2,
1907  s->wavelet_depth, s->bit_depth);
1908  if (ret < 0)
1909  return ret;
1910 
1911  if (!s->num_refs) { /* intra */
1912  for (y = 0; y < p->height; y += 16) {
1913  int idx = (s->bit_depth - 8) >> 1;
1914  ff_spatial_idwt_slice2(&d, y+16); /* decode */
1915  s->diracdsp.put_signed_rect_clamped[idx](frame + y*p->stride,
1916  p->stride,
1917  p->idwt.buf + y*p->idwt.stride,
1918  p->idwt.stride, p->width, 16);
1919  }
1920  } else { /* inter */
1921  int rowheight = p->ybsep*p->stride;
1922 
1923  select_dsp_funcs(s, p->width, p->height, p->xblen, p->yblen);
1924 
1925  for (i = 0; i < s->num_refs; i++) {
1926  int ret = interpolate_refplane(s, s->ref_pics[i], comp, p->width, p->height);
1927  if (ret < 0)
1928  return ret;
1929  }
1930 
1931  memset(s->mctmp, 0, 4*p->yoffset*p->stride);
1932 
1933  dsty = -p->yoffset;
1934  for (y = 0; y < s->blheight; y++) {
1935  int h = 0,
1936  start = FFMAX(dsty, 0);
1937  uint16_t *mctmp = s->mctmp + y*rowheight;
1938  DiracBlock *blocks = s->blmotion + y*s->blwidth;
1939 
1940  init_obmc_weights(s, p, y);
1941 
1942  if (y == s->blheight-1 || start+p->ybsep > p->height)
1943  h = p->height - start;
1944  else
1945  h = p->ybsep - (start - dsty);
1946  if (h < 0)
1947  break;
1948 
1949  memset(mctmp+2*p->yoffset*p->stride, 0, 2*rowheight);
1950  mc_row(s, blocks, mctmp, comp, dsty);
1951 
1952  mctmp += (start - dsty)*p->stride + p->xoffset;
1953  ff_spatial_idwt_slice2(&d, start + h); /* decode */
1954  /* NOTE: add_rect_clamped hasn't been templated hence the shifts.
1955  * idwt.stride is passed as pixels, not in bytes as in the rest of the decoder */
1956  s->diracdsp.add_rect_clamped(frame + start*p->stride, mctmp, p->stride,
1957  (int16_t*)(p->idwt.buf) + start*(p->idwt.stride >> 1), (p->idwt.stride >> 1), p->width, h);
1958 
1959  dsty += p->ybsep;
1960  }
1961  }
1962  }
1963 
1964 
1965  return 0;
1966 }
1967 
1969 {
1970  int ret, i;
1971  int chroma_x_shift, chroma_y_shift;
1972  ret = av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_x_shift,
1973  &chroma_y_shift);
1974  if (ret < 0)
1975  return ret;
1976 
1977  f->width = avctx->width + 2 * EDGE_WIDTH;
1978  f->height = avctx->height + 2 * EDGE_WIDTH + 2;
1979  ret = ff_get_buffer(avctx, f, flags);
1980  if (ret < 0)
1981  return ret;
1982 
1983  for (i = 0; f->data[i]; i++) {
1984  int offset = (EDGE_WIDTH >> (i && i<3 ? chroma_y_shift : 0)) *
1985  f->linesize[i] + 32;
1986  f->data[i] += offset;
1987  }
1988  f->width = avctx->width;
1989  f->height = avctx->height;
1990 
1991  return 0;
1992 }
1993 
1994 /**
1995  * Dirac Specification ->
1996  * 11.1.1 Picture Header. picture_header()
1997  */
1999 {
2000  unsigned retire, picnum;
2001  int i, j, ret;
2002  int64_t refdist, refnum;
2003  GetBitContext *gb = &s->gb;
2004 
2005  /* [DIRAC_STD] 11.1.1 Picture Header. picture_header() PICTURE_NUM */
2006  picnum = s->current_picture->picture_number = get_bits_long(gb, 32);
2007 
2008 
2009  av_log(s->avctx,AV_LOG_DEBUG,"PICTURE_NUM: %d\n",picnum);
2010 
2011  /* if this is the first keyframe after a sequence header, start our
2012  reordering from here */
2013  if (s->frame_number < 0)
2014  s->frame_number = picnum;
2015 
2016  s->ref_pics[0] = s->ref_pics[1] = NULL;
2017  for (i = 0; i < s->num_refs; i++) {
2018  refnum = (picnum + dirac_get_se_golomb(gb)) & 0xFFFFFFFF;
2019  refdist = INT64_MAX;
2020 
2021  /* find the closest reference to the one we want */
2022  /* Jordi: this is needed if the referenced picture hasn't yet arrived */
2023  for (j = 0; j < MAX_REFERENCE_FRAMES && refdist; j++)
2024  if (s->ref_frames[j]
2025  && FFABS(s->ref_frames[j]->picture_number - refnum) < refdist) {
2026  s->ref_pics[i] = s->ref_frames[j];
2027  refdist = FFABS(s->ref_frames[j]->picture_number - refnum);
2028  }
2029 
2030  if (!s->ref_pics[i] || refdist)
2031  av_log(s->avctx, AV_LOG_DEBUG, "Reference not found\n");
2032 
2033  /* if there were no references at all, allocate one */
2034  if (!s->ref_pics[i])
2035  for (j = 0; j < MAX_FRAMES; j++)
2036  if (!s->all_frames[j].avframe->data[0]) {
2037  s->ref_pics[i] = &s->all_frames[j];
2038  ret = get_buffer_with_edge(s->avctx, s->ref_pics[i]->avframe, AV_GET_BUFFER_FLAG_REF);
2039  if (ret < 0)
2040  return ret;
2041  break;
2042  }
2043 
2044  if (!s->ref_pics[i]) {
2045  av_log(s->avctx, AV_LOG_ERROR, "Reference could not be allocated\n");
2046  return AVERROR_INVALIDDATA;
2047  }
2048 
2049  }
2050 
2051  /* retire the reference frames that are not used anymore */
2052  if (s->current_picture->reference) {
2053  retire = (picnum + dirac_get_se_golomb(gb)) & 0xFFFFFFFF;
2054  if (retire != picnum) {
2055  DiracFrame *retire_pic = remove_frame(s->ref_frames, retire);
2056 
2057  if (retire_pic)
2058  retire_pic->reference &= DELAYED_PIC_REF;
2059  else
2060  av_log(s->avctx, AV_LOG_DEBUG, "Frame to retire not found\n");
2061  }
2062 
2063  /* if reference array is full, remove the oldest as per the spec */
2064  while (add_frame(s->ref_frames, MAX_REFERENCE_FRAMES, s->current_picture)) {
2065  av_log(s->avctx, AV_LOG_ERROR, "Reference frame overflow\n");
2066  remove_frame(s->ref_frames, s->ref_frames[0]->picture_number)->reference &= DELAYED_PIC_REF;
2067  }
2068  }
2069 
2070  if (s->num_refs) {
2071  ret = dirac_unpack_prediction_parameters(s); /* [DIRAC_STD] 11.2 Picture Prediction Data. picture_prediction() */
2072  if (ret < 0)
2073  return ret;
2074  ret = dirac_unpack_block_motion_data(s); /* [DIRAC_STD] 12. Block motion data syntax */
2075  if (ret < 0)
2076  return ret;
2077  }
2078  ret = dirac_unpack_idwt_params(s); /* [DIRAC_STD] 11.3 Wavelet transform data */
2079  if (ret < 0)
2080  return ret;
2081 
2082  init_planes(s);
2083  return 0;
2084 }
2085 
2086 static int get_delayed_pic(DiracContext *s, AVFrame *picture, int *got_frame)
2087 {
2088  DiracFrame *out = s->delay_frames[0];
2089  int i, out_idx = 0;
2090  int ret;
2091 
2092  /* find frame with lowest picture number */
2093  for (i = 1; s->delay_frames[i]; i++)
2094  if (s->delay_frames[i]->picture_number < out->picture_number) {
2095  out = s->delay_frames[i];
2096  out_idx = i;
2097  }
2098 
2099  for (i = out_idx; s->delay_frames[i]; i++)
2100  s->delay_frames[i] = s->delay_frames[i+1];
2101 
2102  if (out) {
2103  out->reference ^= DELAYED_PIC_REF;
2104  if((ret = av_frame_ref(picture, out->avframe)) < 0)
2105  return ret;
2106  *got_frame = 1;
2107  }
2108 
2109  return 0;
2110 }
2111 
2112 /**
2113  * Dirac Specification ->
2114  * 9.6 Parse Info Header Syntax. parse_info()
2115  * 4 byte start code + byte parse code + 4 byte size + 4 byte previous size
2116  */
2117 #define DATA_UNIT_HEADER_SIZE 13
2118 
2119 /* [DIRAC_STD] dirac_decode_data_unit makes reference to the while defined in 9.3
2120  inside the function parse_sequence() */
2121 static int dirac_decode_data_unit(AVCodecContext *avctx, const uint8_t *buf, int size)
2122 {
2123  DiracContext *s = avctx->priv_data;
2124  DiracFrame *pic = NULL;
2125  AVDiracSeqHeader *dsh;
2126  int ret, i;
2127  uint8_t parse_code;
2128  unsigned tmp;
2129 
2131  return AVERROR_INVALIDDATA;
2132 
2133  parse_code = buf[4];
2134 
2135  init_get_bits(&s->gb, &buf[13], 8*(size - DATA_UNIT_HEADER_SIZE));
2136 
2137  if (parse_code == DIRAC_PCODE_SEQ_HEADER) {
2138  if (s->seen_sequence_header)
2139  return 0;
2140 
2141  /* [DIRAC_STD] 10. Sequence header */
2143  if (ret < 0) {
2144  av_log(avctx, AV_LOG_ERROR, "error parsing sequence header");
2145  return ret;
2146  }
2147 
2149  ret = AVERROR(ERANGE);
2150  if (ret >= 0)
2151  ret = ff_set_dimensions(avctx, dsh->width, dsh->height);
2152  if (ret < 0) {
2153  av_freep(&dsh);
2154  return ret;
2155  }
2156 
2157  ff_set_sar(avctx, dsh->sample_aspect_ratio);
2158  avctx->pix_fmt = dsh->pix_fmt;
2159  avctx->color_range = dsh->color_range;
2160  avctx->color_trc = dsh->color_trc;
2161  avctx->color_primaries = dsh->color_primaries;
2162  avctx->colorspace = dsh->colorspace;
2163  avctx->profile = dsh->profile;
2164  avctx->level = dsh->level;
2165  avctx->framerate = dsh->framerate;
2166  s->bit_depth = dsh->bit_depth;
2167  s->version.major = dsh->version.major;
2168  s->version.minor = dsh->version.minor;
2169  s->seq = *dsh;
2170  av_freep(&dsh);
2171 
2172  s->pshift = s->bit_depth > 8;
2173 
2175  &s->chroma_x_shift,
2176  &s->chroma_y_shift);
2177  if (ret < 0)
2178  return ret;
2179 
2181  if (ret < 0)
2182  return ret;
2183 
2184  s->seen_sequence_header = 1;
2185  } else if (parse_code == DIRAC_PCODE_END_SEQ) { /* [DIRAC_STD] End of Sequence */
2187  s->seen_sequence_header = 0;
2188  } else if (parse_code == DIRAC_PCODE_AUX) {
2189  if (buf[13] == 1) { /* encoder implementation/version */
2190  int ver[3];
2191  /* versions older than 1.0.8 don't store quant delta for
2192  subbands with only one codeblock */
2193  if (sscanf(buf+14, "Schroedinger %d.%d.%d", ver, ver+1, ver+2) == 3)
2194  if (ver[0] == 1 && ver[1] == 0 && ver[2] <= 7)
2195  s->old_delta_quant = 1;
2196  }
2197  } else if (parse_code & 0x8) { /* picture data unit */
2198  if (!s->seen_sequence_header) {
2199  av_log(avctx, AV_LOG_DEBUG, "Dropping frame without sequence header\n");
2200  return AVERROR_INVALIDDATA;
2201  }
2202 
2203  /* find an unused frame */
2204  for (i = 0; i < MAX_FRAMES; i++)
2205  if (s->all_frames[i].avframe->data[0] == NULL)
2206  pic = &s->all_frames[i];
2207  if (!pic) {
2208  av_log(avctx, AV_LOG_ERROR, "framelist full\n");
2209  return AVERROR_INVALIDDATA;
2210  }
2211 
2212  av_frame_unref(pic->avframe);
2213 
2214  /* [DIRAC_STD] Defined in 9.6.1 ... */
2215  tmp = parse_code & 0x03; /* [DIRAC_STD] num_refs() */
2216  if (tmp > 2) {
2217  av_log(avctx, AV_LOG_ERROR, "num_refs of 3\n");
2218  return AVERROR_INVALIDDATA;
2219  }
2220  s->num_refs = tmp;
2221  s->is_arith = (parse_code & 0x48) == 0x08; /* [DIRAC_STD] using_ac() */
2222  s->low_delay = (parse_code & 0x88) == 0x88; /* [DIRAC_STD] is_low_delay() */
2223  s->core_syntax = (parse_code & 0x88) == 0x08; /* [DIRAC_STD] is_core_syntax() */
2224  s->ld_picture = (parse_code & 0xF8) == 0xC8; /* [DIRAC_STD] is_ld_picture() */
2225  s->hq_picture = (parse_code & 0xF8) == 0xE8; /* [DIRAC_STD] is_hq_picture() */
2226  s->dc_prediction = (parse_code & 0x28) == 0x08; /* [DIRAC_STD] using_dc_prediction() */
2227  pic->reference = (parse_code & 0x0C) == 0x0C; /* [DIRAC_STD] is_reference() */
2228  if (s->num_refs == 0) /* [DIRAC_STD] is_intra() */
2229  pic->avframe->flags |= AV_FRAME_FLAG_KEY;
2230  else
2231  pic->avframe->flags &= ~AV_FRAME_FLAG_KEY;
2232  pic->avframe->pict_type = s->num_refs + 1; /* Definition of AVPictureType in avutil.h */
2233 
2234  /* VC-2 Low Delay has a different parse code than the Dirac Low Delay */
2235  if (s->version.minor == 2 && parse_code == 0x88)
2236  s->ld_picture = 1;
2237 
2238  if (s->low_delay && !(s->ld_picture || s->hq_picture) ) {
2239  av_log(avctx, AV_LOG_ERROR, "Invalid low delay flag\n");
2240  return AVERROR_INVALIDDATA;
2241  }
2242 
2243  if ((ret = get_buffer_with_edge(avctx, pic->avframe, (parse_code & 0x0C) == 0x0C ? AV_GET_BUFFER_FLAG_REF : 0)) < 0)
2244  return ret;
2245  s->current_picture = pic;
2246  s->plane[0].stride = pic->avframe->linesize[0];
2247  s->plane[1].stride = pic->avframe->linesize[1];
2248  s->plane[2].stride = pic->avframe->linesize[2];
2249 
2250  if (alloc_buffers(s, FFMAX3(FFABS(s->plane[0].stride), FFABS(s->plane[1].stride), FFABS(s->plane[2].stride))) < 0)
2251  return AVERROR(ENOMEM);
2252 
2253  /* [DIRAC_STD] 11.1 Picture parse. picture_parse() */
2255  if (ret < 0)
2256  return ret;
2257 
2258  /* [DIRAC_STD] 13.0 Transform data syntax. transform_data() */
2260  if (ret < 0)
2261  return ret;
2262  }
2263  return 0;
2264 }
2265 
2266 static int dirac_decode_frame(AVCodecContext *avctx, AVFrame *picture,
2267  int *got_frame, AVPacket *pkt)
2268 {
2269  DiracContext *s = avctx->priv_data;
2270  const uint8_t *buf = pkt->data;
2271  int buf_size = pkt->size;
2272  int i, buf_idx = 0;
2273  int ret;
2274  unsigned data_unit_size;
2275 
2276  /* release unused frames */
2277  for (i = 0; i < MAX_FRAMES; i++)
2278  if (s->all_frames[i].avframe->data[0] && !s->all_frames[i].reference) {
2279  av_frame_unref(s->all_frames[i].avframe);
2280  memset(s->all_frames[i].interpolated, 0, sizeof(s->all_frames[i].interpolated));
2281  }
2282 
2283  s->current_picture = NULL;
2284  *got_frame = 0;
2285 
2286  /* end of stream, so flush delayed pics */
2287  if (buf_size == 0)
2288  return get_delayed_pic(s, picture, got_frame);
2289 
2290  for (;;) {
2291  /*[DIRAC_STD] Here starts the code from parse_info() defined in 9.6
2292  [DIRAC_STD] PARSE_INFO_PREFIX = "BBCD" as defined in ISO/IEC 646
2293  BBCD start code search */
2294  for (; buf_idx + DATA_UNIT_HEADER_SIZE < buf_size; buf_idx++) {
2295  if (buf[buf_idx ] == 'B' && buf[buf_idx+1] == 'B' &&
2296  buf[buf_idx+2] == 'C' && buf[buf_idx+3] == 'D')
2297  break;
2298  }
2299  /* BBCD found or end of data */
2300  if (buf_idx + DATA_UNIT_HEADER_SIZE >= buf_size)
2301  break;
2302 
2303  data_unit_size = AV_RB32(buf+buf_idx+5);
2304  if (data_unit_size > buf_size - buf_idx || !data_unit_size) {
2305  if(data_unit_size > buf_size - buf_idx)
2306  av_log(s->avctx, AV_LOG_ERROR,
2307  "Data unit with size %d is larger than input buffer, discarding\n",
2308  data_unit_size);
2309  buf_idx += 4;
2310  continue;
2311  }
2312  /* [DIRAC_STD] dirac_decode_data_unit makes reference to the while defined in 9.3 inside the function parse_sequence() */
2313  ret = dirac_decode_data_unit(avctx, buf+buf_idx, data_unit_size);
2314  if (ret < 0)
2315  {
2316  av_log(s->avctx, AV_LOG_ERROR,"Error in dirac_decode_data_unit\n");
2317  return ret;
2318  }
2319  buf_idx += data_unit_size;
2320  }
2321 
2322  if (!s->current_picture)
2323  return buf_size;
2324 
2325  if (s->current_picture->picture_number > s->frame_number) {
2326  DiracFrame *delayed_frame = remove_frame(s->delay_frames, s->frame_number);
2327 
2328  s->current_picture->reference |= DELAYED_PIC_REF;
2329 
2330  if (add_frame(s->delay_frames, MAX_DELAY, s->current_picture)) {
2331  unsigned min_num = s->delay_frames[0]->picture_number;
2332  /* Too many delayed frames, so we display the frame with the lowest pts */
2333  av_log(avctx, AV_LOG_ERROR, "Delay frame overflow\n");
2334 
2335  for (i = 1; s->delay_frames[i]; i++)
2336  if (s->delay_frames[i]->picture_number < min_num)
2337  min_num = s->delay_frames[i]->picture_number;
2338 
2339  delayed_frame = remove_frame(s->delay_frames, min_num);
2340  add_frame(s->delay_frames, MAX_DELAY, s->current_picture);
2341  }
2342 
2343  if (delayed_frame) {
2344  delayed_frame->reference ^= DELAYED_PIC_REF;
2345  if((ret = av_frame_ref(picture, delayed_frame->avframe)) < 0)
2346  return ret;
2347  s->frame_number = delayed_frame->picture_number + 1LL;
2348  *got_frame = 1;
2349  }
2350  } else if (s->current_picture->picture_number == s->frame_number) {
2351  /* The right frame at the right time :-) */
2352  if((ret = av_frame_ref(picture, s->current_picture->avframe)) < 0)
2353  return ret;
2354  s->frame_number = s->current_picture->picture_number + 1LL;
2355  *got_frame = 1;
2356  }
2357 
2358  return buf_idx;
2359 }
2360 
2362  .p.name = "dirac",
2363  CODEC_LONG_NAME("BBC Dirac VC-2"),
2364  .p.type = AVMEDIA_TYPE_VIDEO,
2365  .p.id = AV_CODEC_ID_DIRAC,
2366  .priv_data_size = sizeof(DiracContext),
2368  .close = dirac_decode_end,
2371  .flush = dirac_decode_flush,
2372 };
error
static void error(const char *err)
Definition: target_bsf_fuzzer.c:31
DWTPlane::buf
uint8_t * buf
Definition: dirac_dwt.h:41
DATA_UNIT_HEADER_SIZE
#define DATA_UNIT_HEADER_SIZE
Dirac Specification -> 9.6 Parse Info Header Syntax.
Definition: diracdec.c:2117
A
#define A(x)
Definition: vpx_arith.h:28
DiracContext::put_pixels_tab
void(* put_pixels_tab[4])(uint8_t *dst, const uint8_t *src[5], int stride, int h)
Definition: diracdec.c:228
DiracContext::blmotion
DiracBlock * blmotion
Definition: diracdec.c:217
av_dirac_parse_sequence_header
int av_dirac_parse_sequence_header(AVDiracSeqHeader **pdsh, const uint8_t *buf, size_t buf_size, void *log_ctx)
Parse a Dirac sequence header.
Definition: dirac.c:403
skip_bits_long
static void skip_bits_long(GetBitContext *s, int n)
Skips the specified number of bits.
Definition: get_bits.h:278
DiracContext::num_y
unsigned num_y
Definition: diracdec.c:174
level
uint8_t level
Definition: svq3.c:204
DiracContext::globalmc
struct DiracContext::@78 globalmc[2]
get_bits_left
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:695
DiracContext::blwidth
int blwidth
Definition: diracdec.c:211
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
DiracVersionInfo
Definition: dirac.h:80
AVCodecContext::colorspace
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:685
SliceCoeffs::left
int left
Definition: diracdec.c:815
mem_internal.h
out
FILE * out
Definition: movenc.c:54
EDGE_BOTTOM
#define EDGE_BOTTOM
Definition: mpegvideoencdsp.h:30
comp
static void comp(unsigned char *dst, ptrdiff_t dst_stride, unsigned char *src, ptrdiff_t src_stride, int add)
Definition: eamad.c:80
u
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:250
thread.h
DiracBlock::ref
uint8_t ref
Definition: diracdec.c:88
DiracFrame::picture_number
unsigned picture_number
Definition: diracdec.c:80
subband_hh
@ subband_hh
Definition: diracdec.c:246
CTX_MV_DATA
#define CTX_MV_DATA
Definition: dirac_arith.h:75
MAX_DWT_LEVELS
#define MAX_DWT_LEVELS
The spec limits the number of wavelet decompositions to 4 for both level 1 (VC-2) and 128 (long-gop d...
Definition: dirac.h:49
free_sequence_buffers
static void free_sequence_buffers(DiracContext *s)
Definition: diracdec.c:352
get_bits_long
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:421
epel_weights
static const uint8_t epel_weights[4][4][4]
Definition: diracdec.c:1620
AV_CODEC_ID_DIRAC
@ AV_CODEC_ID_DIRAC
Definition: codec_id.h:168
dirac_decode_picture_header
static int dirac_decode_picture_header(DiracContext *s)
Dirac Specification -> 11.1.1 Picture Header.
Definition: diracdec.c:1998
SliceCoeffs::tot
int tot
Definition: diracdec.c:819
int64_t
long long int64_t
Definition: coverity.c:34
mv
static const int8_t mv[256][2]
Definition: 4xm.c:80
DiracContext::wavelet_idx
unsigned wavelet_idx
Definition: diracdec.c:164
get_bits_count
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:266
dirac_unpack_prediction_parameters
static int dirac_unpack_prediction_parameters(DiracContext *s)
Unpack the motion compensation parameters Dirac Specification -> 11.2 Picture prediction data.
Definition: diracdec.c:1104
DIRAC_REF_MASK_REF1
#define DIRAC_REF_MASK_REF1
DiracBlock->ref flags, if set then the block does MC from the given ref.
Definition: diracdec.c:59
DiracContext::avctx
AVCodecContext * avctx
Definition: diracdec.c:136
get_interleaved_ue_golomb
static unsigned get_interleaved_ue_golomb(GetBitContext *gb)
Definition: golomb.h:143
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:130
AVDiracSeqHeader::color_trc
enum AVColorTransferCharacteristic color_trc
Definition: dirac.h:113
DiracVersionInfo::major
int major
Definition: dirac.h:81
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:344
tmp
static uint8_t tmp[11]
Definition: aes_ctr.c:28
pixdesc.h
SubBand::stride
int stride
Definition: diracdec.c:94
step
trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But a word about which is also called distortion Distortion can be quantified by almost any quality measurement one chooses the sum of squared differences is used but more complex methods that consider psychovisual effects can be used as well It makes no difference in this discussion First step
Definition: rate_distortion.txt:58
DWTPlane
Definition: dirac_dwt.h:37
AVCodecContext::color_trc
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
Definition: avcodec.h:678
w
uint8_t w
Definition: llviddspenc.c:38
AVPacket::data
uint8_t * data
Definition: packet.h:522
SubBand::width
int width
Definition: cfhd.h:111
SubBand::level
int level
Definition: diracdec.c:92
DiracContext::biweight_func
dirac_biweight_func biweight_func
Definition: diracdec.c:232
CTX_SB_F1
#define CTX_SB_F1
Definition: dirac_arith.h:69
CTX_ZERO_BLOCK
@ CTX_ZERO_BLOCK
Definition: dirac_arith.h:58
b
#define b
Definition: input.c:41
DiracContext::perspective_exp
unsigned perspective_exp
Definition: diracdec.c:203
DiracContext::bit_depth
int bit_depth
Definition: diracdec.c:149
decode_lowdelay_slice
static int decode_lowdelay_slice(AVCodecContext *avctx, void *arg)
Dirac Specification -> 13.5.2 Slices.
Definition: diracdec.c:776
FFCodec
Definition: codec_internal.h:127
DiracContext::mpvencdsp
MpegvideoEncDSPContext mpvencdsp
Definition: diracdec.c:137
dirac_biweight_func
void(* dirac_biweight_func)(uint8_t *dst, const uint8_t *src, int stride, int log2_denom, int weightd, int weights, int h)
Definition: diracdsp.h:28
init_planes
static void init_planes(DiracContext *s)
Definition: diracdec.c:1050
dirac_dwt.h
DIRAC_REF_MASK_GLOBAL
#define DIRAC_REF_MASK_GLOBAL
Definition: diracdec.c:61
dirac_arith_init
static AVOnce dirac_arith_init
Definition: diracdec.c:384
AVFrame::flags
int flags
Frame flags, a combination of AV_FRAME_FLAGS.
Definition: frame.h:616
FFMAX
#define FFMAX(a, b)
Definition: macros.h:47
DiracContext::delay_frames
DiracFrame * delay_frames[MAX_DELAY+1]
Definition: diracdec.c:238
AVERROR_UNKNOWN
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
Definition: error.h:73
ff_dirac_qscale_tab
const int32_t ff_dirac_qscale_tab[116]
Definition: diractab.c:34
DiracContext::lowdelay
struct DiracContext::@76 lowdelay
AVDiracSeqHeader::color_range
enum AVColorRange color_range
Definition: dirac.h:111
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:94
MAX_DELAY
#define MAX_DELAY
Definition: diracdec.c:51
DiracArith
Definition: dirac_arith.h:79
dirac_get_arith_int
static int dirac_get_arith_int(DiracArith *c, int follow_ctx, int data_ctx)
Definition: dirac_arith.h:194
CHECKEDREAD
#define CHECKEDREAD(dst, cond, errmsg)
decode_subband
static void decode_subband(const DiracContext *s, GetBitContext *gb, int quant, int slice_x, int slice_y, int bits_end, const SubBand *b1, const SubBand *b2)
Definition: diracdec.c:724
DiracContext::mcscratch
uint8_t * mcscratch
Definition: diracdec.c:223
init_get_bits
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:514
AVDiracSeqHeader::sample_aspect_ratio
AVRational sample_aspect_ratio
Definition: dirac.h:108
DiracContext::current_picture
DiracFrame * current_picture
Definition: diracdec.c:234
alloc_buffers
static int alloc_buffers(DiracContext *s, int stride)
Definition: diracdec.c:323
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:30
DiracContext::zrs
int zrs[2][2]
Definition: diracdec.c:200
diractab.h
ff_dirac_default_qmat
const uint8_t ff_dirac_default_qmat[7][4][4]
Definition: diractab.c:24
DiracFrame
Definition: diracdec.c:74
CTX_DC_F1
#define CTX_DC_F1
Definition: dirac_arith.h:76
ff_mpegvideoencdsp_init
av_cold void ff_mpegvideoencdsp_init(MpegvideoEncDSPContext *c, AVCodecContext *avctx)
Definition: mpegvideoencdsp.c:232
AVCodecContext::framerate
AVRational framerate
Definition: avcodec.h:560
golomb.h
exp golomb vlc stuff
decode_subband_arith
static int decode_subband_arith(AVCodecContext *avctx, void *b)
Definition: diracdec.c:641
get_bits
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:335
AVDiracSeqHeader::level
int level
Definition: dirac.h:105
SubBand::parent
struct SubBand * parent
Definition: diracdec.c:100
subband_lh
@ subband_lh
Definition: diracdec.c:245
codeblock
static int codeblock(const DiracContext *s, SubBand *b, GetBitContext *gb, DiracArith *c, int left, int right, int top, int bottom, int blockcnt_one, int is_arith)
Decode the coeffs in the rectangle defined by left, right, top, bottom [DIRAC_STD] 13....
Definition: diracdec.c:488
DiracContext::ld_picture
int ld_picture
Definition: diracdec.c:157
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:131
b1
static double b1(void *priv, double x, double y)
Definition: vf_xfade.c:2035
DiracContext::edge_emu_buffer
uint8_t * edge_emu_buffer[4]
Definition: diracdec.c:219
AVDiracSeqHeader::version
DiracVersionInfo version
Definition: dirac.h:116
DiracContext::num_refs
int num_refs
Definition: diracdec.c:160
ff_spatial_idwt_init
int ff_spatial_idwt_init(DWTContext *d, DWTPlane *p, enum dwt_type type, int decomposition_count, int bit_depth)
Definition: dirac_dwt.c:36
DiracContext::sbheight
int sbheight
Definition: diracdec.c:214
AVCodecContext::thread_count
int thread_count
thread count is used to decide how many independent tasks should be passed to execute()
Definition: avcodec.h:1582
FFSIGN
#define FFSIGN(a)
Definition: common.h:73
GetBitContext
Definition: get_bits.h:108
DiracContext::blheight
int blheight
Definition: diracdec.c:212
val
static double val(void *priv, double ch)
Definition: aeval.c:78
dirac_unpack_block_motion_data
static int dirac_unpack_block_motion_data(DiracContext *s)
Dirac Specification ->
Definition: diracdec.c:1502
av_pix_fmt_get_chroma_sub_sample
int av_pix_fmt_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift)
Utility function to access log2_chroma_w log2_chroma_h from the pixel format AVPixFmtDescriptor.
Definition: pixdesc.c:2990
decode_component
static int decode_component(DiracContext *s, int comp)
Dirac Specification -> [DIRAC_STD] 13.4.1 core_transform_data()
Definition: diracdec.c:658
ff_videodsp_init
av_cold void ff_videodsp_init(VideoDSPContext *ctx, int bpc)
Definition: videodsp.c:39
DiracSlice::gb
GetBitContext gb
Definition: diracdec.c:129
pred_sbsplit
static int pred_sbsplit(uint8_t *sbsplit, int stride, int x, int y)
Definition: diracdec.c:1328
pred_block_dc
static void pred_block_dc(DiracBlock *block, int stride, int x, int y)
Definition: diracdec.c:1358
dirac.h
decode_subband_internal
static av_always_inline int decode_subband_internal(const DiracContext *s, SubBand *b, int is_arith)
Dirac Specification -> 13.4.2 Non-skipped subbands.
Definition: diracdec.c:598
select_dsp_funcs
static void select_dsp_funcs(DiracContext *s, int width, int height, int xblen, int yblen)
Definition: diracdec.c:1810
av_frame_alloc
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:118
diracdsp.h
DiracContext::hq_picture
int hq_picture
Definition: diracdec.c:156
DiracSlice::bytes
int bytes
Definition: diracdec.c:132
quant
static const uint8_t quant[64]
Definition: vmixdec.c:71
dirac_weight_func
void(* dirac_weight_func)(uint8_t *block, int stride, int log2_denom, int weight, int h)
Definition: diracdsp.h:27
AVCodecContext::color_primaries
enum AVColorPrimaries color_primaries
Chromaticity coordinates of the source primaries.
Definition: avcodec.h:671
DiracContext::perspective
int perspective[2]
Definition: diracdec.c:201
ff_thread_once
static int ff_thread_once(char *control, void(*routine)(void))
Definition: thread.h:205
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
AVDiracSeqHeader::bit_depth
int bit_depth
Definition: dirac.h:117
av_cold
#define av_cold
Definition: attributes.h:90
DiracContext::sbwidth
int sbwidth
Definition: diracdec.c:213
init_get_bits8
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:545
coeff_unpack_golomb
static int coeff_unpack_golomb(GetBitContext *gb, int qfactor, int qoffset)
Definition: diracdec.c:440
AV_FRAME_FLAG_KEY
#define AV_FRAME_FLAG_KEY
A flag to mark frames that are keyframes.
Definition: frame.h:595
DiracContext::chroma_y_shift
int chroma_y_shift
Definition: diracdec.c:147
mask
static const uint16_t mask[17]
Definition: lzw.c:38
ff_dirac_decoder
const FFCodec ff_dirac_decoder
Definition: diracdec.c:2361
ROLLOFF
#define ROLLOFF(i)
width
#define width
FF_CODEC_DECODE_CB
#define FF_CODEC_DECODE_CB(func)
Definition: codec_internal.h:287
s
#define s(width, name)
Definition: cbs_vp9.c:198
DiracSlice::slice_x
int slice_x
Definition: diracdec.c:130
DiracContext::zero_res
int zero_res
Definition: diracdec.c:152
DiracContext::mctmp
uint16_t * mctmp
Definition: diracdec.c:222
Plane::xbsep
uint8_t xbsep
Definition: diracdec.c:118
AV_GET_BUFFER_FLAG_REF
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
Definition: avcodec.h:425
MAX_REFERENCE_FRAMES
#define MAX_REFERENCE_FRAMES
The spec limits this to 3 for frame coding, but in practice can be as high as 6.
Definition: diracdec.c:50
ff_dirac_init_arith_decoder
void ff_dirac_init_arith_decoder(DiracArith *c, GetBitContext *gb, int length)
Definition: dirac_arith.c:96
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:40
AVDiracSeqHeader::profile
int profile
Definition: dirac.h:104
CTX_DELTA_Q_F
@ CTX_DELTA_Q_F
Definition: dirac_arith.h:59
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
DiracContext::version
DiracVersionInfo version
Definition: diracdec.c:140
decode.h
get_bits.h
DiracContext::size_scaler
uint64_t size_scaler
Definition: diracdec.c:195
DWTPlane::stride
int stride
Definition: dirac_dwt.h:40
AVCodecContext::max_pixels
int64_t max_pixels
The number of pixels per image to maximally accept.
Definition: avcodec.h:1934
Plane::idwt
DWTPlane idwt
Definition: diracdec.c:108
bands
static const float bands[]
Definition: af_superequalizer.c:56
DiracContext::seen_sequence_header
int seen_sequence_header
Definition: diracdec.c:143
DiracContext::diracdsp
DiracDSPContext diracdsp
Definition: diracdec.c:139
CODEC_LONG_NAME
#define CODEC_LONG_NAME(str)
Definition: codec_internal.h:272
frame
static AVFrame * frame
Definition: demux_decode.c:54
arg
const char * arg
Definition: jacosubdec.c:67
FFABS
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
if
if(ret)
Definition: filter_design.txt:179
DiracContext::weight
int16_t weight[2]
Definition: diracdec.c:208
AVDiracSeqHeader::framerate
AVRational framerate
Definition: dirac.h:107
av_realloc_f
#define av_realloc_f(p, o, n)
Definition: tableprint_vlc.h:32
DiracContext::slice_params_buf
DiracSlice * slice_params_buf
Definition: diracdec.c:180
DiracContext::edge_emu_buffer_base
uint8_t * edge_emu_buffer_base
Definition: diracdec.c:220
dirac_get_arith_bit
static int dirac_get_arith_bit(DiracArith *c, int ctx)
Definition: dirac_arith.h:137
mc_row
static void mc_row(DiracContext *s, DiracBlock *block, uint16_t *mctmp, int plane, int dsty)
Definition: diracdec.c:1794
ff_dirac_qoffset_inter_tab
const int ff_dirac_qoffset_inter_tab[122]
Definition: diractab.c:72
AV_ONCE_INIT
#define AV_ONCE_INIT
Definition: thread.h:203
DIVRNDUP
#define DIVRNDUP(a, b)
Definition: diracdec.c:72
decode_hq_slice_row
static int decode_hq_slice_row(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
Definition: diracdec.c:917
DiracContext::weight_func
dirac_weight_func weight_func
Definition: diracdec.c:231
NULL
#define NULL
Definition: coverity.c:32
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:64
dirac_decode_frame_internal
static int dirac_decode_frame_internal(DiracContext *s)
Dirac Specification -> 13.0 Transform data syntax.
Definition: diracdec.c:1871
AVCodecContext::color_range
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: avcodec.h:695
SliceCoeffs::tot_v
int tot_v
Definition: diracdec.c:818
decode_lowdelay
static int decode_lowdelay(DiracContext *s)
Dirac Specification -> 13.5.1 low_delay_transform_data()
Definition: diracdec.c:932
subband_coeffs
static int subband_coeffs(const DiracContext *s, int x, int y, int p, SliceCoeffs c[MAX_DWT_LEVELS])
Definition: diracdec.c:822
EDGE_WIDTH
#define EDGE_WIDTH
Definition: mpegpicture.h:34
DiracContext::dc_prediction
int dc_prediction
Definition: diracdec.c:158
DiracContext::wavelet_depth
unsigned wavelet_depth
Definition: diracdec.c:163
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
AVDiracSeqHeader::colorspace
enum AVColorSpace colorspace
Definition: dirac.h:114
DiracSlice::slice_y
int slice_y
Definition: diracdec.c:131
DiracContext::ref_frames
DiracFrame * ref_frames[MAX_REFERENCE_FRAMES+1]
Definition: diracdec.c:237
get_bits1
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:388
DiracContext::old_delta_quant
unsigned old_delta_quant
schroedinger older than 1.0.8 doesn't store quant delta if only one codebook exists in a band
Definition: diracdec.c:170
ff_set_sar
int ff_set_sar(AVCodecContext *avctx, AVRational sar)
Check that the provided sample aspect ratio is valid and set it on the codec context.
Definition: utils.c:109
dirac_get_arith_uint
static int dirac_get_arith_uint(DiracArith *c, int follow_ctx, int data_ctx)
Definition: dirac_arith.h:178
CTX_MV_F1
#define CTX_MV_F1
Definition: dirac_arith.h:74
DIRAC_MAX_QUANT_INDEX
#define DIRAC_MAX_QUANT_INDEX
Definition: diractab.h:41
DIRAC_PCODE_AUX
@ DIRAC_PCODE_AUX
Definition: dirac.h:64
AVCodecContext::level
int level
Encoding level descriptor.
Definition: avcodec.h:1783
DiracContext::thread_buf_size
int thread_buf_size
Definition: diracdec.c:178
subband_ll
@ subband_ll
Definition: diracdec.c:243
AVOnce
#define AVOnce
Definition: thread.h:202
DiracContext::is_arith
int is_arith
Definition: diracdec.c:153
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
DiracContext::width
unsigned width
Definition: diracdec.c:184
weight
static int weight(int i, int blen, int offset)
Definition: diracdec.c:1562
ff_spatial_idwt_slice2
void ff_spatial_idwt_slice2(DWTContext *d, int y)
Definition: dirac_dwt.c:69
dirac_subband
dirac_subband
Definition: diracdec.c:242
DELAYED_PIC_REF
#define DELAYED_PIC_REF
Value of Picture.reference when Picture is not a reference picture, but is held for delayed output.
Definition: diracdec.c:67
add_frame
static int add_frame(DiracFrame *framelist[], int maxframes, DiracFrame *frame)
Definition: diracdec.c:274
DiracContext::codeblock
struct DiracContext::@75 codeblock[MAX_DWT_LEVELS+1]
INTRA_DC_PRED
#define INTRA_DC_PRED(n, type)
Dirac Specification -> 13.3 intra_dc_prediction(band)
Definition: diracdec.c:570
f
f
Definition: af_crystalizer.c:121
dirac_decode_end
static av_cold int dirac_decode_end(AVCodecContext *avctx)
Definition: diracdec.c:425
AVFrame::pict_type
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:446
ff_get_buffer
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1569
init
int(* init)(AVBSFContext *ctx)
Definition: dts2pts.c:365
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
Plane::yoffset
uint8_t yoffset
Definition: diracdec.c:122
Plane::yblen
uint8_t yblen
Definition: diracdec.c:116
AVPacket::size
int size
Definition: packet.h:523
dc
Tag MUST be and< 10hcoeff half pel interpolation filter coefficients, hcoeff[0] are the 2 middle coefficients[1] are the next outer ones and so on, resulting in a filter like:...eff[2], hcoeff[1], hcoeff[0], hcoeff[0], hcoeff[1], hcoeff[2] ... the sign of the coefficients is not explicitly stored but alternates after each coeff and coeff[0] is positive, so ...,+,-,+,-,+,+,-,+,-,+,... hcoeff[0] is not explicitly stored but found by subtracting the sum of all stored coefficients with signs from 32 hcoeff[0]=32 - hcoeff[1] - hcoeff[2] - ... a good choice for hcoeff and htaps is htaps=6 hcoeff={40,-10, 2} an alternative which requires more computations at both encoder and decoder side and may or may not be better is htaps=8 hcoeff={42,-14, 6,-2}ref_frames minimum of the number of available reference frames and max_ref_frames for example the first frame after a key frame always has ref_frames=1spatial_decomposition_type wavelet type 0 is a 9/7 symmetric compact integer wavelet 1 is a 5/3 symmetric compact integer wavelet others are reserved stored as delta from last, last is reset to 0 if always_reset||keyframeqlog quality(logarithmic quantizer scale) stored as delta from last, last is reset to 0 if always_reset||keyframemv_scale stored as delta from last, last is reset to 0 if always_reset||keyframe FIXME check that everything works fine if this changes between framesqbias dequantization bias stored as delta from last, last is reset to 0 if always_reset||keyframeblock_max_depth maximum depth of the block tree stored as delta from last, last is reset to 0 if always_reset||keyframequant_table quantization tableHighlevel bitstream structure:==============================--------------------------------------------|Header|--------------------------------------------|------------------------------------|||Block0||||split?||||yes no||||......... intra?||||:Block01 :yes no||||:Block02 :....... ..........||||:Block03 ::y DC ::ref index:||||:Block04 ::cb DC ::motion x :||||......... :cr DC ::motion y :||||....... ..........|||------------------------------------||------------------------------------|||Block1|||...|--------------------------------------------|------------ ------------ ------------|||Y subbands||Cb subbands||Cr subbands||||--- ---||--- ---||--- ---|||||LL0||HL0||||LL0||HL0||||LL0||HL0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||LH0||HH0||||LH0||HH0||||LH0||HH0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HL1||LH1||||HL1||LH1||||HL1||LH1|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HH1||HL2||||HH1||HL2||||HH1||HL2|||||...||...||...|||------------ ------------ ------------|--------------------------------------------Decoding process:=================------------|||Subbands|------------||||------------|Intra DC||||LL0 subband prediction ------------|\ Dequantization ------------------- \||Reference frames|\ IDWT|------- -------|Motion \|||Frame 0||Frame 1||Compensation . OBMC v -------|------- -------|--------------. \------> Frame n output Frame Frame<----------------------------------/|...|------------------- Range Coder:============Binary Range Coder:------------------- The implemented range coder is an adapted version based upon "Range encoding: an algorithm for removing redundancy from a digitised message." by G. N. N. Martin. The symbols encoded by the Snow range coder are bits(0|1). The associated probabilities are not fix but change depending on the symbol mix seen so far. bit seen|new state ---------+----------------------------------------------- 0|256 - state_transition_table[256 - old_state];1|state_transition_table[old_state];state_transition_table={ 0, 0, 0, 0, 0, 0, 0, 0, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 190, 191, 192, 194, 194, 195, 196, 197, 198, 199, 200, 201, 202, 202, 204, 205, 206, 207, 208, 209, 209, 210, 211, 212, 213, 215, 215, 216, 217, 218, 219, 220, 220, 222, 223, 224, 225, 226, 227, 227, 229, 229, 230, 231, 232, 234, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 248, 0, 0, 0, 0, 0, 0, 0};FIXME Range Coding of integers:------------------------- FIXME Neighboring Blocks:===================left and top are set to the respective blocks unless they are outside of the image in which case they are set to the Null block top-left is set to the top left block unless it is outside of the image in which case it is set to the left block if this block has no larger parent block or it is at the left side of its parent block and the top right block is not outside of the image then the top right block is used for top-right else the top-left block is used Null block y, cb, cr are 128 level, ref, mx and my are 0 Motion Vector Prediction:=========================1. the motion vectors of all the neighboring blocks are scaled to compensate for the difference of reference frames scaled_mv=(mv *(256 *(current_reference+1)/(mv.reference+1))+128)> the median of the scaled top and top right vectors is used as motion vector prediction the used motion vector is the sum of the predictor and(mvx_diff, mvy_diff) *mv_scale Intra DC Prediction block[y][x] dc[1]
Definition: snow.txt:400
av_frame_ref
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Definition: frame.c:354
codec_internal.h
DECLARE_ALIGNED
#define DECLARE_ALIGNED(n, t, v)
Definition: mem_internal.h:109
Plane::height
int height
Definition: cfhd.h:119
AV_WN32
#define AV_WN32(p, v)
Definition: intreadwrite.h:374
DiracContext::gb
GetBitContext gb
Definition: diracdec.c:141
init_obmc_weight_row
static void init_obmc_weight_row(Plane *p, uint8_t *obmc_weight, int stride, int left, int right, int wy)
Definition: diracdec.c:1574
DiracContext::codeblock_mode
unsigned codeblock_mode
Definition: diracdec.c:171
size
int size
Definition: twinvq_data.h:10344
DiracContext::chroma_x_shift
int chroma_x_shift
Definition: diracdec.c:146
SubBand::length
unsigned length
Definition: diracdec.c:103
DiracContext::seq
AVDiracSeqHeader seq
Definition: diracdec.c:142
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:96
DiracContext::bytes
AVRational bytes
Definition: diracdec.c:189
dirac_vlc.h
DiracContext::weight_log2denom
unsigned weight_log2denom
Definition: diracdec.c:209
SubBand
Definition: cfhd.h:108
DiracContext::thread_buf
uint8_t * thread_buf
Definition: diracdec.c:176
split
static char * split(char *message, char delim)
Definition: af_channelmap.c:80
height
#define height
b2
static double b2(void *priv, double x, double y)
Definition: vf_xfade.c:2036
Plane::width
int width
Definition: cfhd.h:118
mpegpicture.h
AV_CODEC_CAP_SLICE_THREADS
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: codec.h:114
dirac_get_se_golomb
static int dirac_get_se_golomb(GetBitContext *gb)
Definition: golomb.h:359
offset
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
Definition: writing_filters.txt:86
add_dc
static void add_dc(uint16_t *dst, int dc, int stride, uint8_t *obmc_weight, int xblen, int yblen)
Definition: diracdec.c:1742
DIRAC_PCODE_SEQ_HEADER
@ DIRAC_PCODE_SEQ_HEADER
Definition: dirac.h:62
get_buffer_with_edge
static int get_buffer_with_edge(AVCodecContext *avctx, AVFrame *f, int flags)
Definition: diracdec.c:1968
pred_block_mode
static int pred_block_mode(DiracBlock *block, int stride, int x, int y, int refmask)
Definition: diracdec.c:1342
subband_nb
@ subband_nb
Definition: diracdec.c:247
init_obmc_weights
static void init_obmc_weights(DiracContext *s, Plane *p, int by)
Definition: diracdec.c:1607
Plane::stride
ptrdiff_t stride
Definition: cfhd.h:120
DiracContext::num_x
unsigned num_x
Definition: diracdec.c:173
DiracContext::prefix_bytes
unsigned prefix_bytes
Definition: diracdec.c:194
MpegvideoEncDSPContext
Definition: mpegvideoencdsp.h:32
DiracBlock
Definition: diracdec.c:83
dirac_decode_frame
static int dirac_decode_frame(AVCodecContext *avctx, AVFrame *picture, int *got_frame, AVPacket *pkt)
Definition: diracdec.c:2266
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:255
DiracContext::low_delay
int low_delay
Definition: diracdec.c:155
pred_mv
static void pred_mv(DiracBlock *block, int stride, int x, int y, int ref)
Definition: diracdec.c:1391
UNPACK_ARITH
#define UNPACK_ARITH(n, type)
Definition: diracdec.c:451
alloc_sequence_buffers
static int alloc_sequence_buffers(DiracContext *s)
Definition: diracdec.c:285
DiracDSPContext
Definition: diracdsp.h:30
DIRAC_REF_MASK_REF2
#define DIRAC_REF_MASK_REF2
Definition: diracdec.c:60
PARSE_VALUES
#define PARSE_VALUES(type, x, gb, ebits, buf1, buf2)
Definition: diracdec.c:712
decode_block_params
static void decode_block_params(DiracContext *s, DiracArith arith[8], DiracBlock *block, int stride, int x, int y)
Definition: diracdec.c:1443
decode_hq_slice
static int decode_hq_slice(const DiracContext *s, DiracSlice *slice, uint8_t *tmp_buf)
VC-2 Specification -> 13.5.3 hq_slice(sx,sy)
Definition: diracdec.c:843
ff_dirac_golomb_read_16bit
int ff_dirac_golomb_read_16bit(const uint8_t *buf, int bytes, uint8_t *_dst, int coeffs)
Definition: dirac_vlc.c:1095
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:31
SubBand::ibuf
uint8_t * ibuf
Definition: diracdec.c:99
DiracContext::globalmc_flag
int globalmc_flag
Definition: diracdec.c:159
CTX_PMODE_REF2
#define CTX_PMODE_REF2
Definition: dirac_arith.h:72
av_always_inline
#define av_always_inline
Definition: attributes.h:49
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
DiracFrame::avframe
AVFrame * avframe
Definition: diracdec.c:75
av_frame_unref
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:576
dirac_arith.h
ff_dirac_init_arith_tables
av_cold void ff_dirac_init_arith_tables(void)
Definition: dirac_arith.c:86
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:194
MAX_BLOCKSIZE
#define MAX_BLOCKSIZE
Definition: diracdec.c:54
mc_subpel
static int mc_subpel(DiracContext *s, DiracBlock *block, const uint8_t *src[5], int x, int y, int ref, int plane)
For block x,y, determine which of the hpel planes to do bilinear interpolation from and set src[] to ...
Definition: diracdec.c:1647
AVCodecContext::height
int height
Definition: avcodec.h:618
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:657
DiracSlice
Definition: diracdec.c:128
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Definition: mem.c:262
interpolate_refplane
static int interpolate_refplane(DiracContext *s, DiracFrame *ref, int plane, int width, int height)
Definition: diracdec.c:1830
DWTContext
Definition: dirac_dwt.h:54
SliceCoeffs::tot_h
int tot_h
Definition: diracdec.c:817
DiracContext::core_syntax
int core_syntax
Definition: diracdec.c:154
DiracVersionInfo::minor
int minor
Definition: dirac.h:82
avcodec.h
stride
#define stride
Definition: h264pred_template.c:537
DiracContext::mv_precision
uint8_t mv_precision
Definition: diracdec.c:207
DiracContext::height
unsigned height
Definition: diracdec.c:185
SubBand::coeff_data
const uint8_t * coeff_data
Definition: diracdec.c:104
DiracContext::highquality
struct DiracContext::@77 highquality
AVDiracSeqHeader
Definition: dirac.h:85
mid_pred
#define mid_pred
Definition: mathops.h:98
SliceCoeffs::top
int top
Definition: diracdec.c:816
ret
ret
Definition: filter_design.txt:187
pred
static const float pred[4]
Definition: siprdata.h:259
Plane::xoffset
uint8_t xoffset
Definition: diracdec.c:121
SliceCoeffs
Definition: diracdec.c:814
FFSWAP
#define FFSWAP(type, a, b)
Definition: macros.h:52
SubBand::pshift
int pshift
Definition: diracdec.c:97
DiracContext::pan_tilt
int pan_tilt[2]
Definition: diracdec.c:199
SubBand::quant
int quant
Definition: diracdec.c:98
align_get_bits
static const uint8_t * align_get_bits(GetBitContext *s)
Definition: get_bits.h:561
left
Tag MUST be and< 10hcoeff half pel interpolation filter coefficients, hcoeff[0] are the 2 middle coefficients[1] are the next outer ones and so on, resulting in a filter like:...eff[2], hcoeff[1], hcoeff[0], hcoeff[0], hcoeff[1], hcoeff[2] ... the sign of the coefficients is not explicitly stored but alternates after each coeff and coeff[0] is positive, so ...,+,-,+,-,+,+,-,+,-,+,... hcoeff[0] is not explicitly stored but found by subtracting the sum of all stored coefficients with signs from 32 hcoeff[0]=32 - hcoeff[1] - hcoeff[2] - ... a good choice for hcoeff and htaps is htaps=6 hcoeff={40,-10, 2} an alternative which requires more computations at both encoder and decoder side and may or may not be better is htaps=8 hcoeff={42,-14, 6,-2}ref_frames minimum of the number of available reference frames and max_ref_frames for example the first frame after a key frame always has ref_frames=1spatial_decomposition_type wavelet type 0 is a 9/7 symmetric compact integer wavelet 1 is a 5/3 symmetric compact integer wavelet others are reserved stored as delta from last, last is reset to 0 if always_reset||keyframeqlog quality(logarithmic quantizer scale) stored as delta from last, last is reset to 0 if always_reset||keyframemv_scale stored as delta from last, last is reset to 0 if always_reset||keyframe FIXME check that everything works fine if this changes between framesqbias dequantization bias stored as delta from last, last is reset to 0 if always_reset||keyframeblock_max_depth maximum depth of the block tree stored as delta from last, last is reset to 0 if always_reset||keyframequant_table quantization tableHighlevel bitstream structure:==============================--------------------------------------------|Header|--------------------------------------------|------------------------------------|||Block0||||split?||||yes no||||......... intra?||||:Block01 :yes no||||:Block02 :....... ..........||||:Block03 ::y DC ::ref index:||||:Block04 ::cb DC ::motion x :||||......... :cr DC ::motion y :||||....... ..........|||------------------------------------||------------------------------------|||Block1|||...|--------------------------------------------|------------ ------------ ------------|||Y subbands||Cb subbands||Cr subbands||||--- ---||--- ---||--- ---|||||LL0||HL0||||LL0||HL0||||LL0||HL0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||LH0||HH0||||LH0||HH0||||LH0||HH0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HL1||LH1||||HL1||LH1||||HL1||LH1|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HH1||HL2||||HH1||HL2||||HH1||HL2|||||...||...||...|||------------ ------------ ------------|--------------------------------------------Decoding process:=================------------|||Subbands|------------||||------------|Intra DC||||LL0 subband prediction ------------|\ Dequantization ------------------- \||Reference frames|\ IDWT|------- -------|Motion \|||Frame 0||Frame 1||Compensation . OBMC v -------|------- -------|--------------. \------> Frame n output Frame Frame<----------------------------------/|...|------------------- Range Coder:============Binary Range Coder:------------------- The implemented range coder is an adapted version based upon "Range encoding: an algorithm for removing redundancy from a digitised message." by G. N. N. Martin. The symbols encoded by the Snow range coder are bits(0|1). The associated probabilities are not fix but change depending on the symbol mix seen so far. bit seen|new state ---------+----------------------------------------------- 0|256 - state_transition_table[256 - old_state];1|state_transition_table[old_state];state_transition_table={ 0, 0, 0, 0, 0, 0, 0, 0, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 190, 191, 192, 194, 194, 195, 196, 197, 198, 199, 200, 201, 202, 202, 204, 205, 206, 207, 208, 209, 209, 210, 211, 212, 213, 215, 215, 216, 217, 218, 219, 220, 220, 222, 223, 224, 225, 226, 227, 227, 229, 229, 230, 231, 232, 234, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 248, 0, 0, 0, 0, 0, 0, 0};FIXME Range Coding of integers:------------------------- FIXME Neighboring Blocks:===================left and top are set to the respective blocks unless they are outside of the image in which case they are set to the Null block top-left is set to the top left block unless it is outside of the image in which case it is set to the left block if this block has no larger parent block or it is at the left side of its parent block and the top right block is not outside of the image then the top right block is used for top-right else the top-left block is used Null block y, cb, cr are 128 level, ref, mx and my are 0 Motion Vector Prediction:=========================1. the motion vectors of all the neighboring blocks are scaled to compensate for the difference of reference frames scaled_mv=(mv *(256 *(current_reference+1)/(mv.reference+1))+128)> the median of the scaled left
Definition: snow.txt:386
remove_frame
static DiracFrame * remove_frame(DiracFrame *framelist[], unsigned picnum)
Definition: diracdec.c:256
U
#define U(x)
Definition: vpx_arith.h:37
ff_dirac_golomb_read_32bit
int ff_dirac_golomb_read_32bit(const uint8_t *buf, int bytes, uint8_t *_dst, int coeffs)
Definition: dirac_vlc.c:1115
DIRAC_PCODE_END_SEQ
@ DIRAC_PCODE_END_SEQ
Definition: dirac.h:63
AVDiracSeqHeader::pix_fmt
enum AVPixelFormat pix_fmt
Definition: dirac.h:110
decode_subband_golomb
static int decode_subband_golomb(AVCodecContext *avctx, void *arg)
Definition: diracdec.c:647
DiracContext
Definition: diracdec.c:135
ff_dirac_qoffset_intra_tab
const int32_t ff_dirac_qoffset_intra_tab[120]
Definition: diractab.c:53
CTX_SB_DATA
#define CTX_SB_DATA
Definition: dirac_arith.h:70
DiracContext::add_obmc
void(* add_obmc)(uint16_t *dst, const uint8_t *src, int stride, const uint8_t *obmc_weight, int yblen)
Definition: diracdec.c:230
AVCodecContext
main external API structure.
Definition: avcodec.h:445
EDGE_TOP
#define EDGE_TOP
Definition: mpegvideoencdsp.h:29
AVCodecContext::execute
int(* execute)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size)
The codec may call this to execute several independent things.
Definition: avcodec.h:1612
subband_hl
@ subband_hl
Definition: diracdec.c:244
DiracContext::all_frames
DiracFrame all_frames[MAX_FRAMES]
Definition: diracdec.c:239
AVCodecContext::profile
int profile
profile
Definition: avcodec.h:1639
mpegvideoencdsp.h
CALC_PADDING
#define CALC_PADDING(size, depth)
Definition: diracdec.c:69
ref
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:112
DiracContext::threads_num_buf
int threads_num_buf
Definition: diracdec.c:177
DiracContext::vdsp
VideoDSPContext vdsp
Definition: diracdec.c:138
AV_CODEC_CAP_DELAY
#define AV_CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: codec.h:76
CTX_GLOBAL_BLOCK
#define CTX_GLOBAL_BLOCK
Definition: dirac_arith.h:73
Plane
Definition: cfhd.h:117
DiracFrame::reference
int reference
Definition: diracdec.c:79
divide3
static int divide3(int x)
Definition: diracdec.c:251
VideoDSPContext
Definition: videodsp.h:40
Plane::xblen
uint8_t xblen
Definition: diracdec.c:115
DiracContext::quant
uint8_t quant[MAX_DWT_LEVELS][4]
Definition: diracdec.c:190
DiracContext::plane
Plane plane[3]
Definition: diracdec.c:145
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
Plane::band
SubBand band[DWT_LEVELS_3D][4]
Definition: cfhd.h:130
propagate_block_data
static void propagate_block_data(DiracBlock *block, int stride, int size)
Copies the current block to the other blocks covered by the current superblock split mode.
Definition: diracdec.c:1483
DiracContext::buffer_stride
int buffer_stride
Definition: diracdec.c:224
DiracContext::slice_params_num_buf
int slice_params_num_buf
Definition: diracdec.c:181
Plane::ybsep
uint8_t ybsep
Definition: diracdec.c:119
AVDiracSeqHeader::width
unsigned width
Definition: dirac.h:86
CTX_PMODE_REF1
#define CTX_PMODE_REF1
Definition: dirac_arith.h:71
FFALIGN
#define FFALIGN(x, a)
Definition: macros.h:78
AVPacket
This structure stores compressed data.
Definition: packet.h:499
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:472
global_mv
static void global_mv(DiracContext *s, DiracBlock *block, int x, int y, int ref)
Definition: diracdec.c:1427
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
DiracContext::avg_pixels_tab
void(* avg_pixels_tab[4])(uint8_t *dst, const uint8_t *src[5], int stride, int h)
Definition: diracdec.c:229
videodsp.h
FFMAX3
#define FFMAX3(a, b, c)
Definition: macros.h:48
DiracContext::ref_pics
DiracFrame * ref_pics[2]
Definition: diracdec.c:235
d
d
Definition: ffmpeg_filter.c:409
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:618
int32_t
int32_t
Definition: audioconvert.c:56
DiracContext::sbsplit
uint8_t * sbsplit
Definition: diracdec.c:216
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:482
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
Definition: frame.h:389
AVDiracSeqHeader::height
unsigned height
Definition: dirac.h:87
block
The exact code depends on how similar the blocks are and how related they are to the block
Definition: filter_design.txt:207
coeff
static const double coeff[2][5]
Definition: vf_owdenoise.c:79
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
CTX_DELTA_Q_DATA
@ CTX_DELTA_Q_DATA
Definition: dirac_arith.h:60
dirac_decode_data_unit
static int dirac_decode_data_unit(AVCodecContext *avctx, const uint8_t *buf, int size)
Definition: diracdec.c:2121
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
dirac_decode_init
static av_cold int dirac_decode_init(AVCodecContext *avctx)
Definition: diracdec.c:386
h
h
Definition: vp9dsp_template.c:2038
ff_diracdsp_init
av_cold void ff_diracdsp_init(DiracDSPContext *c)
Definition: diracdsp.c:221
dirac_unpack_idwt_params
static int dirac_unpack_idwt_params(DiracContext *s)
Dirac Specification -> 11.3 Wavelet transform data.
Definition: diracdec.c:1232
DiracContext::zrs_exp
unsigned zrs_exp
Definition: diracdec.c:202
DiracContext::obmc_weight
uint8_t obmc_weight[3][MAX_BLOCKSIZE *MAX_BLOCKSIZE]
Definition: diracdec.c:226
DWTPlane::width
int width
Definition: dirac_dwt.h:38
dirac_decode_flush
static void dirac_decode_flush(AVCodecContext *avctx)
Definition: diracdec.c:417
int
int
Definition: ffmpeg_filter.c:409
DiracContext::frame_number
int64_t frame_number
Definition: diracdec.c:144
DiracArith::error
int error
Definition: dirac_arith.h:88
AVDiracSeqHeader::color_primaries
enum AVColorPrimaries color_primaries
Definition: dirac.h:112
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:1631
av_log2
int av_log2(unsigned v)
Definition: intmath.c:26
CTX_DC_DATA
#define CTX_DC_DATA
Definition: dirac_arith.h:77
get_delayed_pic
static int get_delayed_pic(DiracContext *s, AVFrame *picture, int *got_frame)
Definition: diracdec.c:2086
SubBand::height
int height
Definition: cfhd.h:113
DiracContext::pshift
int pshift
Definition: diracdec.c:150
MAX_FRAMES
#define MAX_FRAMES
Definition: diracdec.c:52
SubBand::orientation
int orientation
Definition: diracdec.c:93
init_obmc_weight
static void init_obmc_weight(Plane *p, uint8_t *obmc_weight, int stride, int left, int right, int top, int bottom)
Definition: diracdec.c:1588
block_mc
static void block_mc(DiracContext *s, DiracBlock *block, uint16_t *mctmp, uint8_t *obmc_weight, int plane, int dstx, int dsty)
Definition: diracdec.c:1758
DWTPlane::height
int height
Definition: dirac_dwt.h:39
AV_WN16
#define AV_WN16(p, v)
Definition: intreadwrite.h:370