FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/diracdec.c
Date: 2026-01-20 15:28:03
Exec Total Coverage
Lines: 901 1176 76.6%
Functions: 47 52 90.4%
Branches: 569 855 66.5%
Line Branch Exec Source
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.h"
30 #include "libavutil/mem_internal.h"
31 #include "libavutil/pixdesc.h"
32 #include "libavutil/thread.h"
33 #include "avcodec.h"
34 #include "get_bits.h"
35 #include "codec_internal.h"
36 #include "decode.h"
37 #include "golomb.h"
38 #include "dirac_arith.h"
39 #include "dirac_vlc.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 #define EDGE_WIDTH 16
48
49 /**
50 * The spec limits this to 3 for frame coding, but in practice can be as high as 6
51 */
52 #define MAX_REFERENCE_FRAMES 8
53 #define MAX_DELAY 5 /* limit for main profile for frame coding (TODO: field coding) */
54 #define MAX_FRAMES (MAX_REFERENCE_FRAMES + MAX_DELAY + 1)
55 #define MAX_QUANT 255 /* max quant for VC-2 */
56 #define MAX_BLOCKSIZE 32 /* maximum xblen/yblen we support */
57
58 /**
59 * DiracBlock->ref flags, if set then the block does MC from the given ref
60 */
61 #define DIRAC_REF_MASK_REF1 1
62 #define DIRAC_REF_MASK_REF2 2
63 #define DIRAC_REF_MASK_GLOBAL 4
64
65 /**
66 * Value of Picture.reference when Picture is not a reference picture, but
67 * is held for delayed output.
68 */
69 #define DELAYED_PIC_REF 4
70
71 #define CALC_PADDING(size, depth) \
72 (((size + (1 << depth) - 1) >> depth) << depth)
73
74 #define DIVRNDUP(a, b) (((a) + (b) - 1) / (b))
75
76 typedef struct {
77 AVFrame *avframe;
78 int interpolated[3]; /* 1 if hpel[] is valid */
79 uint8_t *hpel[3][4];
80 uint8_t *hpel_base[3][4];
81 int reference;
82 unsigned picture_number;
83 } DiracFrame;
84
85 typedef struct {
86 union {
87 int16_t mv[2][2];
88 int16_t dc[3];
89 } u; /* anonymous unions aren't in C99 :( */
90 uint8_t ref;
91 } DiracBlock;
92
93 typedef struct SubBand {
94 int level;
95 int orientation;
96 int stride; /* in bytes */
97 int width;
98 int height;
99 int pshift;
100 int quant;
101 uint8_t *ibuf;
102 struct SubBand *parent;
103
104 /* for low delay */
105 unsigned length;
106 const uint8_t *coeff_data;
107 } SubBand;
108
109 typedef struct Plane {
110 DWTPlane idwt;
111
112 int width;
113 int height;
114 ptrdiff_t stride;
115
116 /* block length */
117 uint8_t xblen;
118 uint8_t yblen;
119 /* block separation (block n+1 starts after this many pixels in block n) */
120 uint8_t xbsep;
121 uint8_t ybsep;
122 /* amount of overspill on each edge (half of the overlap between blocks) */
123 uint8_t xoffset;
124 uint8_t yoffset;
125
126 SubBand band[MAX_DWT_LEVELS][4];
127 } Plane;
128
129 /* Used by Low Delay and High Quality profiles */
130 typedef struct DiracSlice {
131 GetBitContext gb;
132 int slice_x;
133 int slice_y;
134 int bytes;
135 } DiracSlice;
136
137 typedef struct DiracContext {
138 AVCodecContext *avctx;
139 MpegvideoEncDSPContext mpvencdsp;
140 VideoDSPContext vdsp;
141 DiracDSPContext diracdsp;
142 DiracVersionInfo version;
143 GetBitContext gb;
144 AVDiracSeqHeader seq;
145 int seen_sequence_header;
146 int64_t frame_number; /* number of the next frame to display */
147 Plane plane[3];
148 int chroma_x_shift;
149 int chroma_y_shift;
150
151 int bit_depth; /* bit depth */
152 int pshift; /* pixel shift = bit_depth > 8 */
153
154 int zero_res; /* zero residue flag */
155 int is_arith; /* whether coeffs use arith or golomb coding */
156 int core_syntax; /* use core syntax only */
157 int low_delay; /* use the low delay syntax */
158 int hq_picture; /* high quality picture, enables low_delay */
159 int ld_picture; /* use low delay picture, turns on low_delay */
160 int dc_prediction; /* has dc prediction */
161 int globalmc_flag; /* use global motion compensation */
162 int num_refs; /* number of reference pictures */
163
164 /* wavelet decoding */
165 unsigned wavelet_depth; /* depth of the IDWT */
166 unsigned wavelet_idx;
167
168 /**
169 * schroedinger older than 1.0.8 doesn't store
170 * quant delta if only one codebook exists in a band
171 */
172 unsigned old_delta_quant;
173 unsigned codeblock_mode;
174
175 unsigned num_x; /* number of horizontal slices */
176 unsigned num_y; /* number of vertical slices */
177
178 uint8_t *thread_buf; /* Per-thread buffer for coefficient storage */
179 int threads_num_buf; /* Current # of buffers allocated */
180 int thread_buf_size; /* Each thread has a buffer this size */
181
182 DiracSlice *slice_params_buf;
183 int slice_params_num_buf;
184
185 struct {
186 unsigned width;
187 unsigned height;
188 } codeblock[MAX_DWT_LEVELS+1];
189
190 struct {
191 AVRational bytes; /* average bytes per slice */
192 uint8_t quant[MAX_DWT_LEVELS][4]; /* [DIRAC_STD] E.1 */
193 } lowdelay;
194
195 struct {
196 unsigned prefix_bytes;
197 uint64_t size_scaler;
198 } highquality;
199
200 struct {
201 int pan_tilt[2]; /* pan/tilt vector */
202 int zrs[2][2]; /* zoom/rotate/shear matrix */
203 int perspective[2]; /* perspective vector */
204 unsigned zrs_exp;
205 unsigned perspective_exp;
206 } globalmc[2];
207
208 /* motion compensation */
209 uint8_t mv_precision; /* [DIRAC_STD] REFS_WT_PRECISION */
210 int16_t weight[2]; /* [DIRAC_STD] REF1_WT and REF2_WT */
211 unsigned weight_log2denom; /* [DIRAC_STD] REFS_WT_PRECISION */
212
213 int blwidth; /* number of blocks (horizontally) */
214 int blheight; /* number of blocks (vertically) */
215 int sbwidth; /* number of superblocks (horizontally) */
216 int sbheight; /* number of superblocks (vertically) */
217
218 uint8_t *sbsplit;
219 DiracBlock *blmotion;
220
221 uint8_t *edge_emu_buffer[4];
222 uint8_t *edge_emu_buffer_base;
223
224 uint16_t *mctmp; /* buffer holding the MC data multiplied by OBMC weights */
225 uint8_t *mcscratch;
226 int buffer_stride;
227
228 DECLARE_ALIGNED(16, uint8_t, obmc_weight)[3][MAX_BLOCKSIZE*MAX_BLOCKSIZE];
229
230 void (*put_pixels_tab[4])(uint8_t *dst, const uint8_t *src[5], int stride, int h);
231 void (*avg_pixels_tab[4])(uint8_t *dst, const uint8_t *src[5], int stride, int h);
232 void (*add_obmc)(uint16_t *dst, const uint8_t *src, int stride, const uint8_t *obmc_weight, int yblen);
233 dirac_weight_func weight_func;
234 dirac_biweight_func biweight_func;
235
236 DiracFrame *current_picture;
237 DiracFrame *ref_pics[2];
238
239 DiracFrame *ref_frames[MAX_REFERENCE_FRAMES+1];
240 DiracFrame *delay_frames[MAX_DELAY+1];
241 DiracFrame all_frames[MAX_FRAMES];
242 } DiracContext;
243
244 enum dirac_subband {
245 subband_ll = 0,
246 subband_hl = 1,
247 subband_lh = 2,
248 subband_hh = 3,
249 subband_nb,
250 };
251
252 /* magic number division by 3 from schroedinger */
253 55371 static inline int divide3(int x)
254 {
255 55371 return (int)((x+1U)*21845 + 10922) >> 16;
256 }
257
258 14 static DiracFrame *remove_frame(DiracFrame *framelist[], unsigned picnum)
259 {
260 14 DiracFrame *remove_pic = NULL;
261 14 int i, remove_idx = -1;
262
263
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 39 for (i = 0; framelist[i]; i++)
264
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 25 if (framelist[i]->picture_number == picnum) {
265 13 remove_pic = framelist[i];
266 13 remove_idx = i;
267 }
268
269
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 14 if (remove_pic)
270
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 32 for (i = remove_idx; framelist[i]; i++)
271 19 framelist[i] = framelist[i+1];
272
273 14 return remove_pic;
274 }
275
276 18 static int add_frame(DiracFrame *framelist[], int maxframes, DiracFrame *frame)
277 {
278 int i;
279
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280
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 33 if (!framelist[i]) {
281 18 framelist[i] = frame;
282 18 return 0;
283 }
284 ✗ return -1;
285 }
286
287 70 static int alloc_sequence_buffers(DiracContext *s)
288 {
289 70 int sbwidth = DIVRNDUP(s->seq.width, 4);
290 70 int sbheight = DIVRNDUP(s->seq.height, 4);
291 int i, w, h, top_padding;
292
293 /* todo: think more about this / use or set Plane here */
294
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 280 for (i = 0; i < 3; i++) {
295
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 210 int max_xblen = MAX_BLOCKSIZE >> (i ? s->chroma_x_shift : 0);
296
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 210 int max_yblen = MAX_BLOCKSIZE >> (i ? s->chroma_y_shift : 0);
297
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 210 w = s->seq.width >> (i ? s->chroma_x_shift : 0);
298
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 210 h = s->seq.height >> (i ? s->chroma_y_shift : 0);
299
300 /* we allocate the max we support here since num decompositions can
301 * change from frame to frame. Stride is aligned to 16 for SIMD, and
302 * 1<<MAX_DWT_LEVELS top padding to avoid if(y>0) in arith decoding
303 * MAX_BLOCKSIZE padding for MC: blocks can spill up to half of that
304 * on each side */
305
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 210 top_padding = FFMAX(1<<MAX_DWT_LEVELS, max_yblen/2);
306 210 w = FFALIGN(CALC_PADDING(w, MAX_DWT_LEVELS), 8); /* FIXME: Should this be 16 for SSE??? */
307 210 h = top_padding + CALC_PADDING(h, MAX_DWT_LEVELS) + max_yblen/2;
308
309 210 s->plane[i].idwt.buf_base = av_calloc(w + max_xblen, h * (2 << s->pshift));
310 210 s->plane[i].idwt.tmp = av_malloc_array((w+16), 2 << s->pshift);
311 210 s->plane[i].idwt.buf = s->plane[i].idwt.buf_base + (top_padding*w)*(2 << s->pshift);
312
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 210 if (!s->plane[i].idwt.buf_base || !s->plane[i].idwt.tmp)
313 ✗ return AVERROR(ENOMEM);
314 }
315
316 /* fixme: allocate using real stride here */
317 70 s->sbsplit = av_malloc_array(sbwidth, sbheight);
318 70 s->blmotion = av_malloc_array(sbwidth, sbheight * 16 * sizeof(*s->blmotion));
319
320
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 70 if (!s->sbsplit || !s->blmotion)
321 ✗ return AVERROR(ENOMEM);
322 70 return 0;
323 }
324
325 260 static int alloc_buffers(DiracContext *s, int stride)
326 {
327 260 int w = s->seq.width;
328 260 int h = s->seq.height;
329
330
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 260 av_assert0(stride >= w);
331 260 stride += 64;
332
333
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 260 if (s->buffer_stride >= stride)
334 190 return 0;
335 70 s->buffer_stride = 0;
336
337 70 av_freep(&s->edge_emu_buffer_base);
338 70 memset(s->edge_emu_buffer, 0, sizeof(s->edge_emu_buffer));
339 70 av_freep(&s->mctmp);
340 70 av_freep(&s->mcscratch);
341
342 70 s->edge_emu_buffer_base = av_malloc_array(stride, MAX_BLOCKSIZE);
343
344 70 s->mctmp = av_malloc_array((stride+MAX_BLOCKSIZE), (h+MAX_BLOCKSIZE) * sizeof(*s->mctmp));
345 70 s->mcscratch = av_malloc_array(stride, MAX_BLOCKSIZE);
346
347
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 70 if (!s->edge_emu_buffer_base || !s->mctmp || !s->mcscratch)
348 ✗ return AVERROR(ENOMEM);
349
350 70 s->buffer_stride = stride;
351 70 return 0;
352 }
353
354 70 static av_cold void free_sequence_buffers(DiracContext *s)
355 {
356 int i, j, k;
357
358
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359
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 980 if (s->all_frames[i].avframe->data[0]) {
360 38 av_frame_unref(s->all_frames[i].avframe);
361 38 memset(s->all_frames[i].interpolated, 0, sizeof(s->all_frames[i].interpolated));
362 }
363
364
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365
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366 8820 av_freep(&s->all_frames[i].hpel_base[j][k]);
367 }
368
369 70 memset(s->ref_frames, 0, sizeof(s->ref_frames));
370 70 memset(s->delay_frames, 0, sizeof(s->delay_frames));
371
372
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 280 for (i = 0; i < 3; i++) {
373 210 av_freep(&s->plane[i].idwt.buf_base);
374 210 av_freep(&s->plane[i].idwt.tmp);
375 }
376
377 70 s->buffer_stride = 0;
378 70 av_freep(&s->sbsplit);
379 70 av_freep(&s->blmotion);
380 70 av_freep(&s->edge_emu_buffer_base);
381
382 70 av_freep(&s->mctmp);
383 70 av_freep(&s->mcscratch);
384 70 }
385
386 static AVOnce dirac_arith_init = AV_ONCE_INIT;
387
388 70 static av_cold int dirac_decode_init(AVCodecContext *avctx)
389 {
390 70 DiracContext *s = avctx->priv_data;
391 int i, ret;
392
393 70 s->avctx = avctx;
394 70 s->frame_number = -1;
395
396 70 s->thread_buf = NULL;
397 70 s->threads_num_buf = -1;
398 70 s->thread_buf_size = -1;
399
400 70 ff_diracdsp_init(&s->diracdsp);
401 70 ff_mpegvideoencdsp_init(&s->mpvencdsp, avctx);
402 70 ff_videodsp_init(&s->vdsp, 8);
403
404
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405 980 s->all_frames[i].avframe = av_frame_alloc();
406
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 980 if (!s->all_frames[i].avframe)
407 ✗ return AVERROR(ENOMEM);
408 }
409 70 ret = ff_thread_once(&dirac_arith_init, ff_dirac_init_arith_tables);
410
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 70 if (ret != 0)
411 ✗ return AVERROR_UNKNOWN;
412
413 70 return 0;
414 }
415
416 ✗ static av_cold void dirac_decode_flush(AVCodecContext *avctx)
417 {
418 ✗ DiracContext *s = avctx->priv_data;
419 ✗ free_sequence_buffers(s);
420 ✗ s->seen_sequence_header = 0;
421 ✗ s->frame_number = -1;
422 ✗ }
423
424 70 static av_cold int dirac_decode_end(AVCodecContext *avctx)
425 {
426 70 DiracContext *s = avctx->priv_data;
427 int i;
428
429 // Necessary in case dirac_decode_init() failed
430
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 70 if (s->all_frames[MAX_FRAMES - 1].avframe)
431 70 free_sequence_buffers(s);
432
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433 980 av_frame_free(&s->all_frames[i].avframe);
434
435 70 av_freep(&s->thread_buf);
436 70 av_freep(&s->slice_params_buf);
437
438 70 return 0;
439 }
440
441 1949239 static inline int coeff_unpack_golomb(GetBitContext *gb, int qfactor, int qoffset)
442 {
443 1949239 int coeff = dirac_get_se_golomb(gb);
444
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 1949239 const unsigned sign = FFSIGN(coeff);
445
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 1949239 if (coeff)
446 336797 coeff = sign*((sign * coeff * qfactor + qoffset) >> 2);
447 1949239 return coeff;
448 }
449
450 #define SIGN_CTX(x) (CTX_SIGN_ZERO + ((x) > 0) - ((x) < 0))
451
452 #define UNPACK_ARITH(n, type) \
453 static inline void coeff_unpack_arith_##n(DiracArith *c, int qfactor, int qoffset, \
454 SubBand *b, type *buf, int x, int y) \
455 { \
456 int sign, sign_pred = 0, pred_ctx = CTX_ZPZN_F1; \
457 unsigned coeff; \
458 const int mstride = -(b->stride >> (1+b->pshift)); \
459 if (b->parent) { \
460 const type *pbuf = (type *)b->parent->ibuf; \
461 const int stride = b->parent->stride >> (1+b->parent->pshift); \
462 pred_ctx += !!pbuf[stride * (y>>1) + (x>>1)] << 1; \
463 } \
464 if (b->orientation == subband_hl) \
465 sign_pred = buf[mstride]; \
466 if (x) { \
467 pred_ctx += !(buf[-1] | buf[mstride] | buf[-1 + mstride]); \
468 if (b->orientation == subband_lh) \
469 sign_pred = buf[-1]; \
470 } else { \
471 pred_ctx += !buf[mstride]; \
472 } \
473 coeff = dirac_get_arith_uint(c, pred_ctx, CTX_COEFF_DATA); \
474 if (coeff) { \
475 coeff = (coeff * qfactor + qoffset) >> 2; \
476 sign = dirac_get_arith_bit(c, SIGN_CTX(sign_pred)); \
477 coeff = (coeff ^ -sign) + sign; \
478 } \
479 *buf = coeff; \
480 } \
481
482
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 337100 UNPACK_ARITH(8, int16_t)
483 ✗ UNPACK_ARITH(10, int32_t)
484
485 /**
486 * Decode the coeffs in the rectangle defined by left, right, top, bottom
487 * [DIRAC_STD] 13.4.3.2 Codeblock unpacking loop. codeblock()
488 */
489 82699 static inline int codeblock(const DiracContext *s, SubBand *b,
490 GetBitContext *gb, DiracArith *c,
491 int left, int right, int top, int bottom,
492 int blockcnt_one, int is_arith)
493 {
494 int x, y, zero_block;
495 int qoffset, qfactor;
496 uint8_t *buf;
497
498 /* check for any coded coefficients in this codeblock */
499
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 82699 if (!blockcnt_one) {
500
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 82635 if (is_arith)
501 82635 zero_block = dirac_get_arith_bit(c, CTX_ZERO_BLOCK);
502 else
503 ✗ zero_block = get_bits1(gb);
504
505
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 82635 if (zero_block)
506 77258 return 0;
507 }
508
509
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 5441 if (s->codeblock_mode && !(s->old_delta_quant && blockcnt_one)) {
510 int quant;
511 ✗ if (is_arith)
512 ✗ quant = dirac_get_arith_int(c, CTX_DELTA_Q_F, CTX_DELTA_Q_DATA);
513 else
514 ✗ quant = dirac_get_se_golomb(gb);
515 ✗ if (quant > INT_MAX - b->quant || b->quant + quant < 0) {
516 ✗ av_log(s->avctx, AV_LOG_ERROR, "Invalid quant\n");
517 ✗ return AVERROR_INVALIDDATA;
518 }
519 ✗ b->quant += quant;
520 }
521
522
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 5441 if (b->quant > (DIRAC_MAX_QUANT_INDEX - 1)) {
523 ✗ av_log(s->avctx, AV_LOG_ERROR, "Unsupported quant %d\n", b->quant);
524 ✗ b->quant = 0;
525 ✗ return AVERROR_INVALIDDATA;
526 }
527
528 5441 qfactor = ff_dirac_qscale_tab[b->quant];
529 /* TODO: context pointer? */
530
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 5441 if (!s->num_refs)
531 1700 qoffset = ff_dirac_qoffset_intra_tab[b->quant] + 2;
532 else
533 3741 qoffset = ff_dirac_qoffset_inter_tab[b->quant] + 2;
534
535 5441 buf = b->ibuf + top * b->stride;
536
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 5441 if (is_arith) {
537
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 46055 for (y = top; y < bottom; y++) {
538
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 40614 if (c->error)
539 ✗ return c->error;
540
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 377714 for (x = left; x < right; x++) {
541
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 337100 if (b->pshift) {
542 ✗ coeff_unpack_arith_10(c, qfactor, qoffset, b, (int32_t*)(buf)+x, x, y);
543 } else {
544 337100 coeff_unpack_arith_8(c, qfactor, qoffset, b, (int16_t*)(buf)+x, x, y);
545 }
546 }
547 40614 buf += b->stride;
548 }
549 } else {
550 ✗ for (y = top; y < bottom; y++) {
551 ✗ if (get_bits_left(gb) < 1)
552 ✗ return AVERROR_INVALIDDATA;
553 ✗ for (x = left; x < right; x++) {
554 ✗ int val = coeff_unpack_golomb(gb, qfactor, qoffset);
555 ✗ if (b->pshift) {
556 ✗ AV_WN32(&buf[4*x], val);
557 } else {
558 ✗ AV_WN16(&buf[2*x], val);
559 }
560 }
561 ✗ buf += b->stride;
562 }
563 }
564 5441 return 0;
565 }
566
567 /**
568 * Dirac Specification ->
569 * 13.3 intra_dc_prediction(band)
570 */
571 #define INTRA_DC_PRED(n, type) \
572 static inline void intra_dc_prediction_##n(SubBand *b) \
573 { \
574 type *buf = (type*)b->ibuf; \
575 int x, y; \
576 \
577 for (x = 1; x < b->width; x++) \
578 buf[x] += buf[x-1]; \
579 buf += (b->stride >> (1+b->pshift)); \
580 \
581 for (y = 1; y < b->height; y++) { \
582 buf[0] += buf[-(b->stride >> (1+b->pshift))]; \
583 \
584 for (x = 1; x < b->width; x++) { \
585 int pred = buf[x - 1] + buf[x - (b->stride >> (1+b->pshift))] + buf[x - (b->stride >> (1+b->pshift))-1]; \
586 buf[x] += divide3(pred); \
587 } \
588 buf += (b->stride >> (1+b->pshift)); \
589 } \
590 } \
591
592
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 59400 INTRA_DC_PRED(8, int16_t)
593 ✗ INTRA_DC_PRED(10, uint32_t)
594
595 /**
596 * Dirac Specification ->
597 * 13.4.2 Non-skipped subbands. subband_coeffs()
598 */
599 930 static av_always_inline int decode_subband_internal(const DiracContext *s,
600 SubBand *b, int is_arith)
601 {
602 int cb_x, cb_y, left, right, top, bottom;
603 DiracArith c;
604 GetBitContext gb;
605 930 int cb_width = s->codeblock[b->level + (b->orientation != subband_ll)].width;
606 930 int cb_height = s->codeblock[b->level + (b->orientation != subband_ll)].height;
607 930 int blockcnt_one = (cb_width + cb_height) == 2;
608 int ret;
609
610
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 930 if (!b->length)
611 263 return 0;
612
613 667 init_get_bits8(&gb, b->coeff_data, b->length);
614
615
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 667 if (is_arith)
616 667 ff_dirac_init_arith_decoder(&c, &gb, b->length);
617
618 667 top = 0;
619
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 5972 for (cb_y = 0; cb_y < cb_height; cb_y++) {
620 5305 bottom = (b->height * (cb_y+1LL)) / cb_height;
621 5305 left = 0;
622
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 88004 for (cb_x = 0; cb_x < cb_width; cb_x++) {
623 82699 right = (b->width * (cb_x+1LL)) / cb_width;
624 82699 ret = codeblock(s, b, &gb, &c, left, right, top, bottom, blockcnt_one, is_arith);
625
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 82699 if (ret < 0)
626 ✗ return ret;
627 82699 left = right;
628 }
629 5305 top = bottom;
630 }
631
632
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 667 if (b->orientation == subband_ll && s->num_refs == 0) {
633
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 6 if (s->pshift) {
634 ✗ intra_dc_prediction_10(b);
635 } else {
636 6 intra_dc_prediction_8(b);
637 }
638 }
639 667 return 0;
640 }
641
642 930 static int decode_subband_arith(AVCodecContext *avctx, void *b)
643 {
644 930 const DiracContext *s = avctx->priv_data;
645 930 return decode_subband_internal(s, b, 1);
646 }
647
648 ✗ static int decode_subband_golomb(AVCodecContext *avctx, void *arg)
649 {
650 ✗ const DiracContext *s = avctx->priv_data;
651 ✗ SubBand **b = arg;
652 ✗ return decode_subband_internal(s, *b, 0);
653 }
654
655 /**
656 * Dirac Specification ->
657 * [DIRAC_STD] 13.4.1 core_transform_data()
658 */
659 93 static int decode_component(DiracContext *s, int comp)
660 {
661 93 AVCodecContext *avctx = s->avctx;
662 SubBand *bands[3*MAX_DWT_LEVELS+1];
663 enum dirac_subband orientation;
664 93 int level, num_bands = 0;
665 int ret[3*MAX_DWT_LEVELS+1];
666 int i;
667 93 int damaged_count = 0;
668
669 /* Unpack all subbands at all levels. */
670
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 372 for (level = 0; level < s->wavelet_depth; level++) {
671
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 1209 for (orientation = !!level; orientation < 4; orientation++) {
672 930 SubBand *b = &s->plane[comp].band[level][orientation];
673 930 bands[num_bands++] = b;
674
675 930 align_get_bits(&s->gb);
676 /* [DIRAC_STD] 13.4.2 subband() */
677 930 b->length = get_interleaved_ue_golomb(&s->gb);
678
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 930 if (b->length) {
679 667 b->quant = get_interleaved_ue_golomb(&s->gb);
680
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 667 if (b->quant > (DIRAC_MAX_QUANT_INDEX - 1)) {
681 ✗ av_log(s->avctx, AV_LOG_ERROR, "Unsupported quant %d\n", b->quant);
682 ✗ b->quant = 0;
683 ✗ return AVERROR_INVALIDDATA;
684 }
685 667 align_get_bits(&s->gb);
686 667 b->coeff_data = s->gb.buffer + get_bits_count(&s->gb)/8;
687
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 667 if (b->length > FFMAX(get_bits_left(&s->gb)/8, 0)) {
688 ✗ b->length = FFMAX(get_bits_left(&s->gb)/8, 0);
689 ✗ damaged_count ++;
690 }
691 667 skip_bits_long(&s->gb, b->length*8);
692 }
693 }
694 /* arithmetic coding has inter-level dependencies, so we can only execute one level at a time */
695
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 279 if (s->is_arith)
696
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 279 avctx->execute(avctx, decode_subband_arith, &s->plane[comp].band[level][!!level],
697
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 279 ret + 3*level + !!level, 4-!!level, sizeof(SubBand));
698 }
699 /* golomb coding has no inter-level dependencies, so we can execute all subbands in parallel */
700
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 93 if (!s->is_arith)
701 ✗ avctx->execute(avctx, decode_subband_golomb, bands, ret, num_bands, sizeof(SubBand*));
702
703
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 1023 for (i = 0; i < s->wavelet_depth * 3 + 1; i++) {
704
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 930 if (ret[i] < 0)
705 ✗ damaged_count++;
706 }
707
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 93 if (damaged_count > (s->wavelet_depth * 3 + 1) /2)
708 ✗ return AVERROR_INVALIDDATA;
709
710 93 return 0;
711 }
712
713 #define PARSE_VALUES(type, x, gb, ebits, buf1, buf2) \
714 type *buf = (type *)buf1; \
715 buf[x] = coeff_unpack_golomb(gb, qfactor, qoffset); \
716 if (get_bits_count(gb) >= ebits) \
717 return; \
718 if (buf2) { \
719 buf = (type *)buf2; \
720 buf[x] = coeff_unpack_golomb(gb, qfactor, qoffset); \
721 if (get_bits_count(gb) >= ebits) \
722 return; \
723 } \
724
725 186000 static void decode_subband(const DiracContext *s, GetBitContext *gb, int quant,
726 int slice_x, int slice_y, int bits_end,
727 const SubBand *b1, const SubBand *b2)
728 {
729 186000 int left = b1->width * slice_x / s->num_x;
730 186000 int right = b1->width *(slice_x+1) / s->num_x;
731 186000 int top = b1->height * slice_y / s->num_y;
732 186000 int bottom = b1->height *(slice_y+1) / s->num_y;
733
734 int qfactor, qoffset;
735
736 186000 uint8_t *buf1 = b1->ibuf + top * b1->stride;
737
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 186000 uint8_t *buf2 = b2 ? b2->ibuf + top * b2->stride: NULL;
738 int x, y;
739
740
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 186000 if (quant > (DIRAC_MAX_QUANT_INDEX - 1)) {
741 ✗ av_log(s->avctx, AV_LOG_ERROR, "Unsupported quant %d\n", quant);
742 ✗ return;
743 }
744 186000 qfactor = ff_dirac_qscale_tab[quant];
745 186000 qoffset = ff_dirac_qoffset_intra_tab[quant] + 2;
746 /* we have to constantly check for overread since the spec explicitly
747 requires this, with the meaning that all remaining coeffs are set to 0 */
748
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 186000 if (get_bits_count(gb) >= bits_end)
749 38746 return;
750
751
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 147254 if (s->pshift) {
752 ✗ for (y = top; y < bottom; y++) {
753 ✗ for (x = left; x < right; x++) {
754 ✗ PARSE_VALUES(int32_t, x, gb, bits_end, buf1, buf2);
755 }
756 ✗ buf1 += b1->stride;
757 ✗ if (buf2)
758 ✗ buf2 += b2->stride;
759 }
760 }
761 else {
762
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 518899 for (y = top; y < bottom; y++) {
763
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 1836007 for (x = left; x < right; x++) {
764
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 1464362 PARSE_VALUES(int16_t, x, gb, bits_end, buf1, buf2);
765 }
766 371645 buf1 += b1->stride;
767
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 371645 if (buf2)
768 173605 buf2 += b2->stride;
769 }
770 }
771 }
772
773 /**
774 * Dirac Specification ->
775 * 13.5.2 Slices. slice(sx,sy)
776 */
777 9300 static int decode_lowdelay_slice(AVCodecContext *avctx, void *arg)
778 {
779 9300 const DiracContext *s = avctx->priv_data;
780 9300 DiracSlice *slice = arg;
781 9300 GetBitContext *gb = &slice->gb;
782 enum dirac_subband orientation;
783 int level, quant, chroma_bits, chroma_end;
784
785 9300 int quant_base = get_bits(gb, 7); /*[DIRAC_STD] qindex */
786 9300 int length_bits = av_log2(8 * slice->bytes)+1;
787 9300 int luma_bits = get_bits_long(gb, length_bits);
788
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 9300 int luma_end = get_bits_count(gb) + FFMIN(luma_bits, get_bits_left(gb));
789
790 /* [DIRAC_STD] 13.5.5.2 luma_slice_band */
791
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 37200 for (level = 0; level < s->wavelet_depth; level++)
792
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 120900 for (orientation = !!level; orientation < 4; orientation++) {
793 93000 quant = FFMAX(quant_base - s->lowdelay.quant[level][orientation], 0);
794 93000 decode_subband(s, gb, quant, slice->slice_x, slice->slice_y, luma_end,
795 &s->plane[0].band[level][orientation], NULL);
796 }
797
798 /* consume any unused bits from luma */
799 9300 skip_bits_long(gb, get_bits_count(gb) - luma_end);
800
801 9300 chroma_bits = 8*slice->bytes - 7 - length_bits - luma_bits;
802
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 9300 chroma_end = get_bits_count(gb) + FFMIN(chroma_bits, get_bits_left(gb));
803 /* [DIRAC_STD] 13.5.5.3 chroma_slice_band */
804
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 37200 for (level = 0; level < s->wavelet_depth; level++)
805
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 120900 for (orientation = !!level; orientation < 4; orientation++) {
806 93000 quant = FFMAX(quant_base - s->lowdelay.quant[level][orientation], 0);
807 93000 decode_subband(s, gb, quant, slice->slice_x, slice->slice_y, chroma_end,
808 &s->plane[1].band[level][orientation],
809 &s->plane[2].band[level][orientation]);
810 }
811
812 9300 return 0;
813 }
814
815 typedef struct SliceCoeffs {
816 int left;
817 int top;
818 int tot_h;
819 int tot_v;
820 int tot;
821 } SliceCoeffs;
822
823 117841 static int subband_coeffs(const DiracContext *s, int x, int y, int p,
824 SliceCoeffs c[MAX_DWT_LEVELS])
825 {
826 117841 int level, coef = 0;
827
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 589174 for (level = 0; level < s->wavelet_depth; level++) {
828 471333 SliceCoeffs *o = &c[level];
829 471333 const SubBand *b = &s->plane[p].band[level][3]; /* orientation doesn't matter */
830 471333 o->top = b->height * y / s->num_y;
831 471333 o->left = b->width * x / s->num_x;
832 471333 o->tot_h = ((b->width * (x + 1)) / s->num_x) - o->left;
833 471333 o->tot_v = ((b->height * (y + 1)) / s->num_y) - o->top;
834 471333 o->tot = o->tot_h*o->tot_v;
835
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 471333 coef += o->tot * (4 - !!level);
836 }
837 117841 return coef;
838 }
839
840 /**
841 * VC-2 Specification ->
842 * 13.5.3 hq_slice(sx,sy)
843 */
844 39204 static int decode_hq_slice(const DiracContext *s, DiracSlice *slice, uint8_t *tmp_buf)
845 {
846 int i, level, orientation, quant_idx;
847 int qfactor[MAX_DWT_LEVELS][4], qoffset[MAX_DWT_LEVELS][4];
848 39204 GetBitContext *gb = &slice->gb;
849 SliceCoeffs coeffs_num[MAX_DWT_LEVELS];
850
851 39204 skip_bits_long(gb, 8*s->highquality.prefix_bytes);
852 39204 quant_idx = get_bits(gb, 8);
853
854
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 39204 if (quant_idx > DIRAC_MAX_QUANT_INDEX - 1) {
855 ✗ av_log(s->avctx, AV_LOG_ERROR, "Invalid quantization index - %i\n", quant_idx);
856 ✗ return AVERROR_INVALIDDATA;
857 }
858
859 /* Slice quantization (slice_quantizers() in the specs) */
860
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 196020 for (level = 0; level < s->wavelet_depth; level++) {
861
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 666468 for (orientation = !!level; orientation < 4; orientation++) {
862 509652 const int quant = FFMAX(quant_idx - s->lowdelay.quant[level][orientation], 0);
863 509652 qfactor[level][orientation] = ff_dirac_qscale_tab[quant];
864 509652 qoffset[level][orientation] = ff_dirac_qoffset_intra_tab[quant] + 2;
865 }
866 }
867
868 /* Luma + 2 Chroma planes */
869
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 156816 for (i = 0; i < 3; i++) {
870 117612 int coef_num, coef_par, off = 0;
871 117612 int64_t length = s->highquality.size_scaler*get_bits(gb, 8);
872 117612 int64_t bits_end = get_bits_count(gb) + 8*length;
873 117612 const uint8_t *addr = align_get_bits(gb);
874
875
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 117612 if (length*8 > get_bits_left(gb)) {
876 ✗ av_log(s->avctx, AV_LOG_ERROR, "end too far away\n");
877 ✗ return AVERROR_INVALIDDATA;
878 }
879
880 117612 coef_num = subband_coeffs(s, slice->slice_x, slice->slice_y, i, coeffs_num);
881
882
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 117612 if (s->pshift)
883 85536 coef_par = ff_dirac_golomb_read_32bit(addr, length,
884 tmp_buf, coef_num);
885 else
886 32076 coef_par = ff_dirac_golomb_read_16bit(addr, length,
887 tmp_buf, coef_num);
888
889
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 117612 if (coef_num > coef_par) {
890 ✗ const int start_b = coef_par * (1 << (s->pshift + 1));
891 ✗ const int end_b = coef_num * (1 << (s->pshift + 1));
892 ✗ memset(&tmp_buf[start_b], 0, end_b - start_b);
893 }
894
895
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 588060 for (level = 0; level < s->wavelet_depth; level++) {
896 470448 const SliceCoeffs *c = &coeffs_num[level];
897
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 1999404 for (orientation = !!level; orientation < 4; orientation++) {
898 1528956 const SubBand *b1 = &s->plane[i].band[level][orientation];
899 1528956 uint8_t *buf = b1->ibuf + c->top * b1->stride + (c->left << (s->pshift + 1));
900
901 /* Change to c->tot_h <= 4 for AVX2 dequantization */
902
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 1528956 const int qfunc = s->pshift + 2*(c->tot_h <= 2);
903 1528956 s->diracdsp.dequant_subband[qfunc](&tmp_buf[off], buf, b1->stride,
904 qfactor[level][orientation],
905 qoffset[level][orientation],
906 1528956 c->tot_v, c->tot_h);
907
908 1528956 off += c->tot << (s->pshift + 1);
909 }
910 }
911
912 117612 skip_bits_long(gb, bits_end - get_bits_count(gb));
913 }
914
915 39204 return 0;
916 }
917
918 3564 static int decode_hq_slice_row(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
919 {
920 int i;
921 3564 const DiracContext *s = avctx->priv_data;
922 3564 DiracSlice *slices = ((DiracSlice *)arg) + s->num_x*jobnr;
923 3564 uint8_t *thread_buf = &s->thread_buf[s->thread_buf_size*threadnr];
924
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 42768 for (i = 0; i < s->num_x; i++)
925 39204 decode_hq_slice(s, &slices[i], thread_buf);
926 3564 return 0;
927 }
928
929 /**
930 * Dirac Specification ->
931 * 13.5.1 low_delay_transform_data()
932 */
933 229 static int decode_lowdelay(DiracContext *s)
934 {
935 229 AVCodecContext *avctx = s->avctx;
936 int slice_x, slice_y, bufsize;
937 229 int64_t coef_buf_size, bytes = 0;
938 const uint8_t *buf;
939 DiracSlice *slices;
940 SliceCoeffs tmp[MAX_DWT_LEVELS];
941 229 int slice_num = 0;
942
943
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 229 if (s->slice_params_num_buf != (s->num_x * s->num_y)) {
944 68 s->slice_params_buf = av_realloc_f(s->slice_params_buf, s->num_x * s->num_y, sizeof(DiracSlice));
945
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 68 if (!s->slice_params_buf) {
946 ✗ av_log(s->avctx, AV_LOG_ERROR, "slice params buffer allocation failure\n");
947 ✗ s->slice_params_num_buf = 0;
948 ✗ return AVERROR(ENOMEM);
949 }
950 68 s->slice_params_num_buf = s->num_x * s->num_y;
951 }
952 229 slices = s->slice_params_buf;
953
954 /* 8 becacuse that's how much the golomb reader could overread junk data
955 * from another plane/slice at most, and 512 because SIMD */
956 229 coef_buf_size = subband_coeffs(s, s->num_x - 1, s->num_y - 1, 0, tmp) + 8;
957 229 coef_buf_size = (coef_buf_size << (1 + s->pshift)) + 512;
958
959
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 229 if (s->threads_num_buf != avctx->thread_count ||
960
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 161 s->thread_buf_size != coef_buf_size) {
961 68 s->threads_num_buf = avctx->thread_count;
962 68 s->thread_buf_size = coef_buf_size;
963 68 s->thread_buf = av_realloc_f(s->thread_buf, avctx->thread_count, s->thread_buf_size);
964
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 68 if (!s->thread_buf) {
965 ✗ av_log(s->avctx, AV_LOG_ERROR, "thread buffer allocation failure\n");
966 ✗ return AVERROR(ENOMEM);
967 }
968 }
969
970 229 align_get_bits(&s->gb);
971 /*[DIRAC_STD] 13.5.2 Slices. slice(sx,sy) */
972 229 buf = s->gb.buffer + get_bits_count(&s->gb)/8;
973 229 bufsize = get_bits_left(&s->gb);
974
975
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 229 if (s->hq_picture) {
976 int i;
977
978
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979
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 42768 for (slice_x = 0; bufsize > 0 && slice_x < s->num_x; slice_x++) {
980 39204 bytes = s->highquality.prefix_bytes + 1;
981
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 156816 for (i = 0; i < 3; i++) {
982
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 117612 if (bytes <= bufsize/8)
983 117612 bytes += buf[bytes] * s->highquality.size_scaler + 1;
984 }
985
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 39204 if (bytes >= INT_MAX || bytes*8 > bufsize) {
986 ✗ av_log(s->avctx, AV_LOG_ERROR, "too many bytes\n");
987 ✗ return AVERROR_INVALIDDATA;
988 }
989
990 39204 slices[slice_num].bytes = bytes;
991 39204 slices[slice_num].slice_x = slice_x;
992 39204 slices[slice_num].slice_y = slice_y;
993 39204 init_get_bits(&slices[slice_num].gb, buf, bufsize);
994 39204 slice_num++;
995
996 39204 buf += bytes;
997
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 39204 if (bufsize/8 >= bytes)
998 39204 bufsize -= bytes*8;
999 else
1000 ✗ bufsize = 0;
1001 }
1002 }
1003
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 198 if (s->num_x*s->num_y != slice_num) {
1005 ✗ av_log(s->avctx, AV_LOG_ERROR, "too few slices\n");
1006 ✗ return AVERROR_INVALIDDATA;
1007 }
1008
1009 198 avctx->execute2(avctx, decode_hq_slice_row, slices, NULL, s->num_y);
1010 } else {
1011
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 496 for (slice_y = 0; bufsize > 0 && slice_y < s->num_y; slice_y++) {
1012
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 9765 for (slice_x = 0; bufsize > 0 && slice_x < s->num_x; slice_x++) {
1013 9300 bytes = (slice_num+1) * (int64_t)s->lowdelay.bytes.num / s->lowdelay.bytes.den
1014 9300 - slice_num * (int64_t)s->lowdelay.bytes.num / s->lowdelay.bytes.den;
1015
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 9300 if (bytes >= INT_MAX || bytes*8 > bufsize) {
1016 ✗ av_log(s->avctx, AV_LOG_ERROR, "too many bytes\n");
1017 ✗ return AVERROR_INVALIDDATA;
1018 }
1019 9300 slices[slice_num].bytes = bytes;
1020 9300 slices[slice_num].slice_x = slice_x;
1021 9300 slices[slice_num].slice_y = slice_y;
1022 9300 init_get_bits(&slices[slice_num].gb, buf, bufsize);
1023 9300 slice_num++;
1024
1025 9300 buf += bytes;
1026
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 9300 if (bufsize/8 >= bytes)
1027 9300 bufsize -= bytes*8;
1028 else
1029 ✗ bufsize = 0;
1030 }
1031 }
1032 31 avctx->execute(avctx, decode_lowdelay_slice, slices, NULL, slice_num,
1033 sizeof(DiracSlice)); /* [DIRAC_STD] 13.5.2 Slices */
1034 }
1035
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 229 if (s->dc_prediction) {
1037
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 31 if (s->pshift) {
1038 ✗ intra_dc_prediction_10(&s->plane[0].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */
1039 ✗ intra_dc_prediction_10(&s->plane[1].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */
1040 ✗ intra_dc_prediction_10(&s->plane[2].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */
1041 } else {
1042 31 intra_dc_prediction_8(&s->plane[0].band[0][0]);
1043 31 intra_dc_prediction_8(&s->plane[1].band[0][0]);
1044 31 intra_dc_prediction_8(&s->plane[2].band[0][0]);
1045 }
1046 }
1047
1048 229 return 0;
1049 }
1050
1051 260 static void init_planes(DiracContext *s)
1052 {
1053 int i, w, h, level, orientation;
1054
1055
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 1040 for (i = 0; i < 3; i++) {
1056 780 Plane *p = &s->plane[i];
1057
1058
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 780 p->width = s->seq.width >> (i ? s->chroma_x_shift : 0);
1059
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 780 p->height = s->seq.height >> (i ? s->chroma_y_shift : 0);
1060 780 p->idwt.width = w = CALC_PADDING(p->width , s->wavelet_depth);
1061 780 p->idwt.height = h = CALC_PADDING(p->height, s->wavelet_depth);
1062 780 p->idwt.stride = FFALIGN(p->idwt.width, 8) << (1 + s->pshift);
1063
1064
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 3714 for (level = s->wavelet_depth-1; level >= 0; level--) {
1065 2934 w = w>>1;
1066 2934 h = h>>1;
1067
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 12516 for (orientation = !!level; orientation < 4; orientation++) {
1068 9582 SubBand *b = &p->band[level][orientation];
1069
1070 9582 b->pshift = s->pshift;
1071 9582 b->ibuf = p->idwt.buf;
1072 9582 b->level = level;
1073 9582 b->stride = p->idwt.stride << (s->wavelet_depth - level);
1074 9582 b->width = w;
1075 9582 b->height = h;
1076 9582 b->orientation = orientation;
1077
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 9582 if (orientation & 1)
1079 5868 b->ibuf += w << (1+b->pshift);
1080
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 9582 if (orientation > 1)
1081 5868 b->ibuf += (b->stride>>1);
1082
1083
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 9582 if (level)
1084 6462 b->parent = &p->band[level-1][orientation];
1085 }
1086 }
1087
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 780 if (i > 0) {
1089 520 p->xblen = s->plane[0].xblen >> s->chroma_x_shift;
1090 520 p->yblen = s->plane[0].yblen >> s->chroma_y_shift;
1091 520 p->xbsep = s->plane[0].xbsep >> s->chroma_x_shift;
1092 520 p->ybsep = s->plane[0].ybsep >> s->chroma_y_shift;
1093 }
1094
1095 780 p->xoffset = (p->xblen - p->xbsep)/2;
1096 780 p->yoffset = (p->yblen - p->ybsep)/2;
1097 }
1098 260 }
1099
1100 /**
1101 * Unpack the motion compensation parameters
1102 * Dirac Specification ->
1103 * 11.2 Picture prediction data. picture_prediction()
1104 */
1105 29 static int dirac_unpack_prediction_parameters(DiracContext *s)
1106 {
1107 static const uint8_t default_blen[] = { 4, 12, 16, 24 };
1108
1109 29 GetBitContext *gb = &s->gb;
1110 unsigned idx, ref;
1111
1112 29 align_get_bits(gb);
1113 /* [DIRAC_STD] 11.2.2 Block parameters. block_parameters() */
1114 /* Luma and Chroma are equal. 11.2.3 */
1115 29 idx = get_interleaved_ue_golomb(gb); /* [DIRAC_STD] index */
1116
1117
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 29 if (idx > 4) {
1118 ✗ av_log(s->avctx, AV_LOG_ERROR, "Block prediction index too high\n");
1119 ✗ return AVERROR_INVALIDDATA;
1120 }
1121
1122
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 29 if (idx == 0) {
1123 29 s->plane[0].xblen = get_interleaved_ue_golomb(gb);
1124 29 s->plane[0].yblen = get_interleaved_ue_golomb(gb);
1125 29 s->plane[0].xbsep = get_interleaved_ue_golomb(gb);
1126 29 s->plane[0].ybsep = get_interleaved_ue_golomb(gb);
1127 } else {
1128 /*[DIRAC_STD] preset_block_params(index). Table 11.1 */
1129 ✗ s->plane[0].xblen = default_blen[idx-1];
1130 ✗ s->plane[0].yblen = default_blen[idx-1];
1131 ✗ s->plane[0].xbsep = 4 * idx;
1132 ✗ s->plane[0].ybsep = 4 * idx;
1133 }
1134 /*[DIRAC_STD] 11.2.4 motion_data_dimensions()
1135 Calculated in function dirac_unpack_block_motion_data */
1136
1137
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 29 if (s->plane[0].xblen % (1 << s->chroma_x_shift) != 0 ||
1138
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 29 s->plane[0].yblen % (1 << s->chroma_y_shift) != 0 ||
1139
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 29 !s->plane[0].xblen || !s->plane[0].yblen) {
1140 ✗ av_log(s->avctx, AV_LOG_ERROR,
1141 "invalid x/y block length (%d/%d) for x/y chroma shift (%d/%d)\n",
1142 ✗ s->plane[0].xblen, s->plane[0].yblen, s->chroma_x_shift, s->chroma_y_shift);
1143 ✗ return AVERROR_INVALIDDATA;
1144 }
1145
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 29 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) {
1146 ✗ av_log(s->avctx, AV_LOG_ERROR, "Block separation too small\n");
1147 ✗ return AVERROR_INVALIDDATA;
1148 }
1149
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 29 if (s->plane[0].xbsep > s->plane[0].xblen || s->plane[0].ybsep > s->plane[0].yblen) {
1150 ✗ av_log(s->avctx, AV_LOG_ERROR, "Block separation greater than size\n");
1151 ✗ return AVERROR_INVALIDDATA;
1152 }
1153
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 29 if (FFMAX(s->plane[0].xblen, s->plane[0].yblen) > MAX_BLOCKSIZE) {
1154 ✗ av_log(s->avctx, AV_LOG_ERROR, "Unsupported large block size\n");
1155 ✗ return AVERROR_PATCHWELCOME;
1156 }
1157
1158 /*[DIRAC_STD] 11.2.5 Motion vector precision. motion_vector_precision()
1159 Read motion vector precision */
1160 29 s->mv_precision = get_interleaved_ue_golomb(gb);
1161
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 29 if (s->mv_precision > 3) {
1162 ✗ av_log(s->avctx, AV_LOG_ERROR, "MV precision finer than eighth-pel\n");
1163 ✗ return AVERROR_INVALIDDATA;
1164 }
1165
1166 /*[DIRAC_STD] 11.2.6 Global motion. global_motion()
1167 Read the global motion compensation parameters */
1168 29 s->globalmc_flag = get_bits1(gb);
1169
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 29 if (s->globalmc_flag) {
1170 ✗ memset(s->globalmc, 0, sizeof(s->globalmc));
1171 /* [DIRAC_STD] pan_tilt(gparams) */
1172 ✗ for (ref = 0; ref < s->num_refs; ref++) {
1173 ✗ if (get_bits1(gb)) {
1174 ✗ s->globalmc[ref].pan_tilt[0] = dirac_get_se_golomb(gb);
1175 ✗ s->globalmc[ref].pan_tilt[1] = dirac_get_se_golomb(gb);
1176 }
1177 /* [DIRAC_STD] zoom_rotate_shear(gparams)
1178 zoom/rotation/shear parameters */
1179 ✗ if (get_bits1(gb)) {
1180 ✗ s->globalmc[ref].zrs_exp = get_interleaved_ue_golomb(gb);
1181 ✗ s->globalmc[ref].zrs[0][0] = dirac_get_se_golomb(gb);
1182 ✗ s->globalmc[ref].zrs[0][1] = dirac_get_se_golomb(gb);
1183 ✗ s->globalmc[ref].zrs[1][0] = dirac_get_se_golomb(gb);
1184 ✗ s->globalmc[ref].zrs[1][1] = dirac_get_se_golomb(gb);
1185 } else {
1186 ✗ s->globalmc[ref].zrs[0][0] = 1;
1187 ✗ s->globalmc[ref].zrs[1][1] = 1;
1188 }
1189 /* [DIRAC_STD] perspective(gparams) */
1190 ✗ if (get_bits1(gb)) {
1191 ✗ s->globalmc[ref].perspective_exp = get_interleaved_ue_golomb(gb);
1192 ✗ s->globalmc[ref].perspective[0] = dirac_get_se_golomb(gb);
1193 ✗ s->globalmc[ref].perspective[1] = dirac_get_se_golomb(gb);
1194 }
1195 ✗ if (s->globalmc[ref].perspective_exp + (uint64_t)s->globalmc[ref].zrs_exp > 30) {
1196 ✗ return AVERROR_INVALIDDATA;
1197 }
1198
1199 }
1200 }
1201
1202 /*[DIRAC_STD] 11.2.7 Picture prediction mode. prediction_mode()
1203 Picture prediction mode, not currently used. */
1204
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 29 if (get_interleaved_ue_golomb(gb)) {
1205 ✗ av_log(s->avctx, AV_LOG_ERROR, "Unknown picture prediction mode\n");
1206 ✗ return AVERROR_INVALIDDATA;
1207 }
1208
1209 /* [DIRAC_STD] 11.2.8 Reference picture weight. reference_picture_weights()
1210 just data read, weight calculation will be done later on. */
1211 29 s->weight_log2denom = 1;
1212 29 s->weight[0] = 1;
1213 29 s->weight[1] = 1;
1214
1215
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 29 if (get_bits1(gb)) {
1216 ✗ s->weight_log2denom = get_interleaved_ue_golomb(gb);
1217 ✗ if (s->weight_log2denom < 1 || s->weight_log2denom > 8) {
1218 ✗ av_log(s->avctx, AV_LOG_ERROR, "weight_log2denom unsupported or invalid\n");
1219 ✗ s->weight_log2denom = 1;
1220 ✗ return AVERROR_INVALIDDATA;
1221 }
1222 ✗ s->weight[0] = dirac_get_se_golomb(gb);
1223 ✗ if (s->num_refs == 2)
1224 ✗ s->weight[1] = dirac_get_se_golomb(gb);
1225 }
1226 29 return 0;
1227 }
1228
1229 /**
1230 * Dirac Specification ->
1231 * 11.3 Wavelet transform data. wavelet_transform()
1232 */
1233 260 static int dirac_unpack_idwt_params(DiracContext *s)
1234 {
1235 260 GetBitContext *gb = &s->gb;
1236 int i, level;
1237 unsigned tmp;
1238
1239 #define CHECKEDREAD(dst, cond, errmsg) \
1240 tmp = get_interleaved_ue_golomb(gb); \
1241 if (cond) { \
1242 av_log(s->avctx, AV_LOG_ERROR, errmsg); \
1243 return AVERROR_INVALIDDATA; \
1244 }\
1245 dst = tmp;
1246
1247 260 align_get_bits(gb);
1248
1249
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 260 s->zero_res = s->num_refs ? get_bits1(gb) : 0;
1250
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 260 if (s->zero_res)
1251 ✗ return 0;
1252
1253 /*[DIRAC_STD] 11.3.1 Transform parameters. transform_parameters() */
1254
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 260 CHECKEDREAD(s->wavelet_idx, tmp > 6, "wavelet_idx is too big\n")
1255
1256
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 260 CHECKEDREAD(s->wavelet_depth, tmp > MAX_DWT_LEVELS || tmp < 1, "invalid number of DWT decompositions\n")
1257
1258
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 260 if (!s->low_delay) {
1259 /* Codeblock parameters (core syntax only) */
1260
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 31 if (get_bits1(gb)) {
1261
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 155 for (i = 0; i <= s->wavelet_depth; i++) {
1262
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 124 CHECKEDREAD(s->codeblock[i].width , tmp < 1 || tmp > (s->avctx->width >>s->wavelet_depth-i), "codeblock width invalid\n")
1263
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 124 CHECKEDREAD(s->codeblock[i].height, tmp < 1 || tmp > (s->avctx->height>>s->wavelet_depth-i), "codeblock height invalid\n")
1264 }
1265
1266
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 31 CHECKEDREAD(s->codeblock_mode, tmp > 1, "unknown codeblock mode\n")
1267 }
1268 else {
1269 ✗ for (i = 0; i <= s->wavelet_depth; i++)
1270 ✗ s->codeblock[i].width = s->codeblock[i].height = 1;
1271 }
1272 }
1273 else {
1274 229 s->num_x = get_interleaved_ue_golomb(gb);
1275 229 s->num_y = get_interleaved_ue_golomb(gb);
1276
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 229 if (s->num_x * s->num_y == 0 || s->num_x * (uint64_t)s->num_y > INT_MAX ||
1277
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 229 s->num_x * (uint64_t)s->avctx->width > INT_MAX ||
1278
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 229 s->num_y * (uint64_t)s->avctx->height > INT_MAX ||
1279
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 229 s->num_x > s->avctx->width ||
1280
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 229 s->num_y > s->avctx->height
1281 ) {
1282 ✗ av_log(s->avctx,AV_LOG_ERROR,"Invalid numx/y\n");
1283 ✗ s->num_x = s->num_y = 0;
1284 ✗ return AVERROR_INVALIDDATA;
1285 }
1286
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 229 if (s->ld_picture) {
1287 31 s->lowdelay.bytes.num = get_interleaved_ue_golomb(gb);
1288 31 s->lowdelay.bytes.den = get_interleaved_ue_golomb(gb);
1289
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 31 if (s->lowdelay.bytes.den <= 0) {
1290 ✗ av_log(s->avctx,AV_LOG_ERROR,"Invalid lowdelay.bytes.den\n");
1291 ✗ return AVERROR_INVALIDDATA;
1292 }
1293
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 198 } else if (s->hq_picture) {
1294 198 s->highquality.prefix_bytes = get_interleaved_ue_golomb(gb);
1295 198 s->highquality.size_scaler = get_interleaved_ue_golomb(gb);
1296
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 198 if (s->highquality.prefix_bytes >= INT_MAX / 8) {
1297 ✗ av_log(s->avctx,AV_LOG_ERROR,"too many prefix bytes\n");
1298 ✗ return AVERROR_INVALIDDATA;
1299 }
1300 }
1301
1302 /* [DIRAC_STD] 11.3.5 Quantisation matrices (low-delay syntax). quant_matrix() */
1303
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 229 if (get_bits1(gb)) {
1304 ✗ av_log(s->avctx,AV_LOG_DEBUG,"Low Delay: Has Custom Quantization Matrix!\n");
1305 /* custom quantization matrix */
1306 ✗ for (level = 0; level < s->wavelet_depth; level++) {
1307 ✗ for (i = !!level; i < 4; i++) {
1308 ✗ s->lowdelay.quant[level][i] = get_interleaved_ue_golomb(gb);
1309 }
1310 }
1311 } else {
1312
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 229 if (s->wavelet_depth > 4) {
1313 ✗ av_log(s->avctx,AV_LOG_ERROR,"Mandatory custom low delay matrix missing for depth %d\n", s->wavelet_depth);
1314 ✗ return AVERROR_INVALIDDATA;
1315 }
1316 /* default quantization matrix */
1317
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 1114 for (level = 0; level < s->wavelet_depth; level++)
1318
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 4425 for (i = 0; i < 4; i++) {
1319 3540 s->lowdelay.quant[level][i] = ff_dirac_default_qmat[s->wavelet_idx][level][i];
1320 /* haar with no shift differs for different depths */
1321
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 3540 if (s->wavelet_idx == 3)
1322 ✗ s->lowdelay.quant[level][i] += 4*(s->wavelet_depth-1 - level);
1323 }
1324 }
1325 }
1326 260 return 0;
1327 }
1328
1329 2320 static inline int pred_sbsplit(uint8_t *sbsplit, int stride, int x, int y)
1330 {
1331 static const uint8_t avgsplit[7] = { 0, 0, 1, 1, 1, 2, 2 };
1332
1333
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 2320 if (!(x|y))
1334 29 return 0;
1335
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 2291 else if (!y)
1336 261 return sbsplit[-1];
1337
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 2030 else if (!x)
1338 203 return sbsplit[-stride];
1339
1340 1827 return avgsplit[sbsplit[-1] + sbsplit[-stride] + sbsplit[-stride-1]];
1341 }
1342
1343 8493 static inline int pred_block_mode(DiracBlock *block, int stride, int x, int y, int refmask)
1344 {
1345 int pred;
1346
1347
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 8493 if (!(x|y))
1348 57 return 0;
1349
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 8436 else if (!y)
1350 545 return block[-1].ref & refmask;
1351
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 7891 else if (!x)
1352 399 return block[-stride].ref & refmask;
1353
1354 /* return the majority */
1355 7492 pred = (block[-1].ref & refmask) + (block[-stride].ref & refmask) + (block[-stride-1].ref & refmask);
1356 7492 return (pred >> 1) & refmask;
1357 }
1358
1359 754 static inline void pred_block_dc(DiracBlock *block, int stride, int x, int y)
1360 {
1361 754 int i, n = 0;
1362
1363 754 memset(block->u.dc, 0, sizeof(block->u.dc));
1364
1365
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 754 if (x && !(block[-1].ref & 3)) {
1366
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 1752 for (i = 0; i < 3; i++)
1367 1314 block->u.dc[i] += block[-1].u.dc[i];
1368 438 n++;
1369 }
1370
1371
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 754 if (y && !(block[-stride].ref & 3)) {
1372
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 1616 for (i = 0; i < 3; i++)
1373 1212 block->u.dc[i] += block[-stride].u.dc[i];
1374 404 n++;
1375 }
1376
1377
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 754 if (x && y && !(block[-1-stride].ref & 3)) {
1378
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 1372 for (i = 0; i < 3; i++)
1379 1029 block->u.dc[i] += block[-1-stride].u.dc[i];
1380 343 n++;
1381 }
1382
1383
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 754 if (n == 2) {
1384
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 880 for (i = 0; i < 3; i++)
1385 660 block->u.dc[i] = (block->u.dc[i]+1)>>1;
1386
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 534 } else if (n == 3) {
1387
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 656 for (i = 0; i < 3; i++)
1388 492 block->u.dc[i] = divide3(block->u.dc[i]);
1389 }
1390 754 }
1391
1392 5951 static inline void pred_mv(DiracBlock *block, int stride, int x, int y, int ref)
1393 {
1394 int16_t *pred[3];
1395 5951 int refmask = ref+1;
1396 5951 int mask = refmask | DIRAC_REF_MASK_GLOBAL; /* exclude gmc blocks */
1397 5951 int n = 0;
1398
1399
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 5951 if (x && (block[-1].ref & mask) == refmask)
1400 4890 pred[n++] = block[-1].u.mv[ref];
1401
1402
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 5951 if (y && (block[-stride].ref & mask) == refmask)
1403 4719 pred[n++] = block[-stride].u.mv[ref];
1404
1405
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 5951 if (x && y && (block[-stride-1].ref & mask) == refmask)
1406 4313 pred[n++] = block[-stride-1].u.mv[ref];
1407
1408
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 5951 switch (n) {
1409 304 case 0:
1410 304 block->u.mv[ref][0] = 0;
1411 304 block->u.mv[ref][1] = 0;
1412 304 break;
1413 1266 case 1:
1414 1266 block->u.mv[ref][0] = pred[0][0];
1415 1266 block->u.mv[ref][1] = pred[0][1];
1416 1266 break;
1417 487 case 2:
1418 487 block->u.mv[ref][0] = (pred[0][0] + pred[1][0] + 1) >> 1;
1419 487 block->u.mv[ref][1] = (pred[0][1] + pred[1][1] + 1) >> 1;
1420 487 break;
1421 3894 case 3:
1422 3894 block->u.mv[ref][0] = mid_pred(pred[0][0], pred[1][0], pred[2][0]);
1423 3894 block->u.mv[ref][1] = mid_pred(pred[0][1], pred[1][1], pred[2][1]);
1424 3894 break;
1425 }
1426 5951 }
1427
1428 ✗ static void global_mv(DiracContext *s, DiracBlock *block, int x, int y, int ref)
1429 {
1430 ✗ int ez = s->globalmc[ref].zrs_exp;
1431 ✗ int ep = s->globalmc[ref].perspective_exp;
1432 ✗ int (*A)[2] = s->globalmc[ref].zrs;
1433 ✗ int *b = s->globalmc[ref].pan_tilt;
1434 ✗ int *c = s->globalmc[ref].perspective;
1435
1436 ✗ int64_t m = (1<<ep) - (c[0]*(int64_t)x + c[1]*(int64_t)y);
1437 ✗ int64_t mx = m * (uint64_t)((A[0][0] * (int64_t)x + A[0][1]*(int64_t)y) + (1LL<<ez) * b[0]);
1438 ✗ int64_t my = m * (uint64_t)((A[1][0] * (int64_t)x + A[1][1]*(int64_t)y) + (1LL<<ez) * b[1]);
1439
1440 ✗ block->u.mv[ref][0] = (mx + (1<<(ez+ep))) >> (ez+ep);
1441 ✗ block->u.mv[ref][1] = (my + (1<<(ez+ep))) >> (ez+ep);
1442 ✗ }
1443
1444 4348 static void decode_block_params(DiracContext *s, DiracArith arith[8], DiracBlock *block,
1445 int stride, int x, int y)
1446 {
1447 int i;
1448
1449 4348 block->ref = pred_block_mode(block, stride, x, y, DIRAC_REF_MASK_REF1);
1450 4348 block->ref ^= dirac_get_arith_bit(arith, CTX_PMODE_REF1);
1451
1452
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 4348 if (s->num_refs == 2) {
1453 4145 block->ref |= pred_block_mode(block, stride, x, y, DIRAC_REF_MASK_REF2);
1454 4145 block->ref ^= dirac_get_arith_bit(arith, CTX_PMODE_REF2) << 1;
1455 }
1456
1457
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 4348 if (!block->ref) {
1458 754 pred_block_dc(block, stride, x, y);
1459
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 3016 for (i = 0; i < 3; i++)
1460 2262 block->u.dc[i] += (unsigned)dirac_get_arith_int(arith+1+i, CTX_DC_F1, CTX_DC_DATA);
1461 754 return;
1462 }
1463
1464
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 3594 if (s->globalmc_flag) {
1465 ✗ block->ref |= pred_block_mode(block, stride, x, y, DIRAC_REF_MASK_GLOBAL);
1466 ✗ block->ref ^= dirac_get_arith_bit(arith, CTX_GLOBAL_BLOCK) << 2;
1467 }
1468
1469
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 10636 for (i = 0; i < s->num_refs; i++)
1470
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 7042 if (block->ref & (i+1)) {
1471
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 5951 if (block->ref & DIRAC_REF_MASK_GLOBAL) {
1472 ✗ global_mv(s, block, x, y, i);
1473 } else {
1474 5951 pred_mv(block, stride, x, y, i);
1475 5951 block->u.mv[i][0] += (unsigned)dirac_get_arith_int(arith + 4 + 2 * i, CTX_MV_F1, CTX_MV_DATA);
1476 5951 block->u.mv[i][1] += (unsigned)dirac_get_arith_int(arith + 5 + 2 * i, CTX_MV_F1, CTX_MV_DATA);
1477 }
1478 }
1479 }
1480
1481 /**
1482 * Copies the current block to the other blocks covered by the current superblock split mode
1483 */
1484 4348 static void propagate_block_data(DiracBlock *block, int stride, int size)
1485 {
1486 int x, y;
1487 4348 DiracBlock *dst = block;
1488
1489
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 11112 for (x = 1; x < size; x++)
1490 6764 dst[x] = *block;
1491
1492
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 11112 for (y = 1; y < size; y++) {
1493 6764 dst += stride;
1494
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 32772 for (x = 0; x < size; x++)
1495 26008 dst[x] = *block;
1496 }
1497 4348 }
1498
1499 /**
1500 * Dirac Specification ->
1501 * 12. Block motion data syntax
1502 */
1503 29 static int dirac_unpack_block_motion_data(DiracContext *s)
1504 {
1505 29 GetBitContext *gb = &s->gb;
1506 29 uint8_t *sbsplit = s->sbsplit;
1507 int i, x, y, q, p;
1508 DiracArith arith[8];
1509
1510 29 align_get_bits(gb);
1511
1512 /* [DIRAC_STD] 11.2.4 and 12.2.1 Number of blocks and superblocks */
1513 29 s->sbwidth = DIVRNDUP(s->seq.width, 4*s->plane[0].xbsep);
1514 29 s->sbheight = DIVRNDUP(s->seq.height, 4*s->plane[0].ybsep);
1515 29 s->blwidth = 4 * s->sbwidth;
1516 29 s->blheight = 4 * s->sbheight;
1517
1518 /* [DIRAC_STD] 12.3.1 Superblock splitting modes. superblock_split_modes()
1519 decode superblock split modes */
1520 29 ff_dirac_init_arith_decoder(arith, gb, get_interleaved_ue_golomb(gb)); /* get_interleaved_ue_golomb(gb) is the length */
1521
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 261 for (y = 0; y < s->sbheight; y++) {
1522
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 2552 for (x = 0; x < s->sbwidth; x++) {
1523 2320 unsigned int split = dirac_get_arith_uint(arith, CTX_SB_F1, CTX_SB_DATA);
1524
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 2320 if (split > 2)
1525 ✗ return AVERROR_INVALIDDATA;
1526 2320 sbsplit[x] = (split + pred_sbsplit(sbsplit+x, s->sbwidth, x, y)) % 3;
1527 }
1528 232 sbsplit += s->sbwidth;
1529 }
1530
1531 /* setup arith decoding */
1532 29 ff_dirac_init_arith_decoder(arith, gb, get_interleaved_ue_golomb(gb));
1533
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 86 for (i = 0; i < s->num_refs; i++) {
1534 57 ff_dirac_init_arith_decoder(arith + 4 + 2 * i, gb, get_interleaved_ue_golomb(gb));
1535 57 ff_dirac_init_arith_decoder(arith + 5 + 2 * i, gb, get_interleaved_ue_golomb(gb));
1536 }
1537
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 116 for (i = 0; i < 3; i++)
1538 87 ff_dirac_init_arith_decoder(arith+1+i, gb, get_interleaved_ue_golomb(gb));
1539
1540
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 261 for (y = 0; y < s->sbheight; y++)
1541
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 2552 for (x = 0; x < s->sbwidth; x++) {
1542 2320 int blkcnt = 1 << s->sbsplit[y * s->sbwidth + x];
1543 2320 int step = 4 >> s->sbsplit[y * s->sbwidth + x];
1544
1545
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 5098 for (q = 0; q < blkcnt; q++)
1546
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 7126 for (p = 0; p < blkcnt; p++) {
1547 4348 int bx = 4 * x + p*step;
1548 4348 int by = 4 * y + q*step;
1549 4348 DiracBlock *block = &s->blmotion[by*s->blwidth + bx];
1550 4348 decode_block_params(s, arith, block, s->blwidth, bx, by);
1551 4348 propagate_block_data(block, s->blwidth, step);
1552 }
1553 }
1554
1555
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 259 for (i = 0; i < 4 + 2*s->num_refs; i++) {
1556
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 230 if (arith[i].error)
1557 ✗ return arith[i].error;
1558 }
1559
1560 29 return 0;
1561 }
1562
1563 72384 static int weight(int i, int blen, int offset)
1564 {
1565 #define ROLLOFF(i) offset == 1 ? ((i) ? 5 : 3) : \
1566 (1 + (6*(i) + offset - 1) / (2*offset - 1))
1567
1568
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 72384 if (i < 2*offset)
1569
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 36192 return ROLLOFF(i);
1570
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 36192 else if (i > blen-1 - 2*offset)
1571
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 36192 return ROLLOFF(blen-1 - i);
1572 ✗ return 8;
1573 }
1574
1575 8352 static void init_obmc_weight_row(Plane *p, uint8_t *obmc_weight, int stride,
1576 int left, int right, int wy)
1577 {
1578 int x;
1579
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 25056 for (x = 0; left && x < p->xblen >> 1; x++)
1580 16704 obmc_weight[x] = wy*8;
1581
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 75168 for (; x < p->xblen >> right; x++)
1582 66816 obmc_weight[x] = wy*weight(x, p->xblen, p->xoffset);
1583
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 25056 for (; x < p->xblen; x++)
1584 16704 obmc_weight[x] = wy*8;
1585
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 175392 for (; x < stride; x++)
1586 167040 obmc_weight[x] = 0;
1587 8352 }
1588
1589 783 static void init_obmc_weight(Plane *p, uint8_t *obmc_weight, int stride,
1590 int left, int right, int top, int bottom)
1591 {
1592 int y;
1593
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 2175 for (y = 0; top && y < p->yblen >> 1; y++) {
1594 1392 init_obmc_weight_row(p, obmc_weight, stride, left, right, 8);
1595 1392 obmc_weight += stride;
1596 }
1597
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 6351 for (; y < p->yblen >> bottom; y++) {
1598 5568 int wy = weight(y, p->yblen, p->yoffset);
1599 5568 init_obmc_weight_row(p, obmc_weight, stride, left, right, wy);
1600 5568 obmc_weight += stride;
1601 }
1602
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 2175 for (; y < p->yblen; y++) {
1603 1392 init_obmc_weight_row(p, obmc_weight, stride, left, right, 8);
1604 1392 obmc_weight += stride;
1605 }
1606 783 }
1607
1608 2784 static void init_obmc_weights(DiracContext *s, Plane *p, int by)
1609 {
1610 2784 int top = !by;
1611 2784 int bottom = by == s->blheight-1;
1612
1613 /* don't bother re-initing for rows 2 to blheight-2, the weights don't change */
1614
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 2784 if (top || bottom || by == 1) {
1615 261 init_obmc_weight(p, s->obmc_weight[0], MAX_BLOCKSIZE, 1, 0, top, bottom);
1616 261 init_obmc_weight(p, s->obmc_weight[1], MAX_BLOCKSIZE, 0, 0, top, bottom);
1617 261 init_obmc_weight(p, s->obmc_weight[2], MAX_BLOCKSIZE, 0, 1, top, bottom);
1618 }
1619 2784 }
1620
1621 static const uint8_t epel_weights[4][4][4] = {
1622 {{ 16, 0, 0, 0 },
1623 { 12, 4, 0, 0 },
1624 { 8, 8, 0, 0 },
1625 { 4, 12, 0, 0 }},
1626 {{ 12, 0, 4, 0 },
1627 { 9, 3, 3, 1 },
1628 { 6, 6, 2, 2 },
1629 { 3, 9, 1, 3 }},
1630 {{ 8, 0, 8, 0 },
1631 { 6, 2, 6, 2 },
1632 { 4, 4, 4, 4 },
1633 { 2, 6, 2, 6 }},
1634 {{ 4, 0, 12, 0 },
1635 { 3, 1, 9, 3 },
1636 { 2, 2, 6, 6 },
1637 { 1, 3, 3, 9 }}
1638 };
1639
1640 /**
1641 * For block x,y, determine which of the hpel planes to do bilinear
1642 * interpolation from and set src[] to the location in each hpel plane
1643 * to MC from.
1644 *
1645 * @return the index of the put_dirac_pixels_tab function to use
1646 * 0 for 1 plane (fpel,hpel), 1 for 2 planes (qpel), 2 for 4 planes (qpel), and 3 for epel
1647 */
1648 199452 static int mc_subpel(DiracContext *s, DiracBlock *block, const uint8_t *src[5],
1649 int x, int y, int ref, int plane)
1650 {
1651 199452 Plane *p = &s->plane[plane];
1652 199452 uint8_t **ref_hpel = s->ref_pics[ref]->hpel[plane];
1653 199452 int motion_x = block->u.mv[ref][0];
1654 199452 int motion_y = block->u.mv[ref][1];
1655 199452 int mx, my, i, epel, nplanes = 0;
1656
1657
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 199452 if (plane) {
1658 132968 motion_x >>= s->chroma_x_shift;
1659 132968 motion_y >>= s->chroma_y_shift;
1660 }
1661
1662 199452 mx = motion_x & ~(-1U << s->mv_precision);
1663 199452 my = motion_y & ~(-1U << s->mv_precision);
1664 199452 motion_x >>= s->mv_precision;
1665 199452 motion_y >>= s->mv_precision;
1666 /* normalize subpel coordinates to epel */
1667 /* TODO: template this function? */
1668 199452 mx <<= 3 - s->mv_precision;
1669 199452 my <<= 3 - s->mv_precision;
1670
1671 199452 x += motion_x;
1672 199452 y += motion_y;
1673 199452 epel = (mx|my)&1;
1674
1675 /* hpel position */
1676
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 199452 if (!((mx|my)&3)) {
1677 199452 nplanes = 1;
1678 199452 src[0] = ref_hpel[(my>>1)+(mx>>2)] + y*p->stride + x;
1679 } else {
1680 /* qpel or epel */
1681 ✗ nplanes = 4;
1682 ✗ for (i = 0; i < 4; i++)
1683 ✗ src[i] = ref_hpel[i] + y*p->stride + x;
1684
1685 /* if we're interpolating in the right/bottom halves, adjust the planes as needed
1686 we increment x/y because the edge changes for half of the pixels */
1687 ✗ if (mx > 4) {
1688 ✗ src[0] += 1;
1689 ✗ src[2] += 1;
1690 ✗ x++;
1691 }
1692 ✗ if (my > 4) {
1693 ✗ src[0] += p->stride;
1694 ✗ src[1] += p->stride;
1695 ✗ y++;
1696 }
1697
1698 /* hpel planes are:
1699 [0]: F [1]: H
1700 [2]: V [3]: C */
1701 ✗ if (!epel) {
1702 /* check if we really only need 2 planes since either mx or my is
1703 a hpel position. (epel weights of 0 handle this there) */
1704 ✗ if (!(mx&3)) {
1705 /* mx == 0: average [0] and [2]
1706 mx == 4: average [1] and [3] */
1707 ✗ src[!mx] = src[2 + !!mx];
1708 ✗ nplanes = 2;
1709 ✗ } else if (!(my&3)) {
1710 ✗ src[0] = src[(my>>1) ];
1711 ✗ src[1] = src[(my>>1)+1];
1712 ✗ nplanes = 2;
1713 }
1714 } else {
1715 /* adjust the ordering if needed so the weights work */
1716 ✗ if (mx > 4) {
1717 ✗ FFSWAP(const uint8_t *, src[0], src[1]);
1718 ✗ FFSWAP(const uint8_t *, src[2], src[3]);
1719 }
1720 ✗ if (my > 4) {
1721 ✗ FFSWAP(const uint8_t *, src[0], src[2]);
1722 ✗ FFSWAP(const uint8_t *, src[1], src[3]);
1723 }
1724 ✗ src[4] = epel_weights[my&3][mx&3];
1725 }
1726 }
1727
1728 /* fixme: v/h _edge_pos */
1729
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 199452 if (x + p->xblen > p->width +EDGE_WIDTH/2 ||
1730
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 199293 y + p->yblen > p->height+EDGE_WIDTH/2 ||
1731
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 191702 x < 0 || y < 0) {
1732
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 27830 for (i = 0; i < nplanes; i++) {
1733 13915 s->vdsp.emulated_edge_mc(s->edge_emu_buffer[i], src[i],
1734 p->stride, p->stride,
1735 13915 p->xblen, p->yblen, x, y,
1736 13915 p->width+EDGE_WIDTH/2, p->height+EDGE_WIDTH/2);
1737 13915 src[i] = s->edge_emu_buffer[i];
1738 }
1739 }
1740 199452 return (nplanes>>1) + epel;
1741 }
1742
1743 2262 static void add_dc(uint16_t *dst, int dc, int stride,
1744 uint8_t *obmc_weight, int xblen, int yblen)
1745 {
1746 int x, y;
1747 2262 dc += 128;
1748
1749
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 26390 for (y = 0; y < yblen; y++) {
1750
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 168896 for (x = 0; x < xblen; x += 2) {
1751 144768 dst[x ] += dc * obmc_weight[x ];
1752 144768 dst[x+1] += dc * obmc_weight[x+1];
1753 }
1754 24128 dst += stride;
1755 24128 obmc_weight += MAX_BLOCKSIZE;
1756 }
1757 2262 }
1758
1759 107880 static void block_mc(DiracContext *s, DiracBlock *block,
1760 uint16_t *mctmp, uint8_t *obmc_weight,
1761 int plane, int dstx, int dsty)
1762 {
1763 107880 Plane *p = &s->plane[plane];
1764 const uint8_t *src[5];
1765 int idx;
1766
1767
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 107880 switch (block->ref&3) {
1768 2262 case 0: /* DC */
1769 2262 add_dc(mctmp, block->u.dc[plane], p->stride, obmc_weight, p->xblen, p->yblen);
1770 2262 return;
1771 11784 case 1:
1772 case 2:
1773 11784 idx = mc_subpel(s, block, src, dstx, dsty, (block->ref&3)-1, plane);
1774 11784 s->put_pixels_tab[idx](s->mcscratch, src, p->stride, p->yblen);
1775
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 11784 if (s->weight_func)
1776 ✗ s->weight_func(s->mcscratch, p->stride, s->weight_log2denom,
1777 ✗ s->weight[0] + s->weight[1], p->yblen);
1778 11784 break;
1779 93834 case 3:
1780 93834 idx = mc_subpel(s, block, src, dstx, dsty, 0, plane);
1781 93834 s->put_pixels_tab[idx](s->mcscratch, src, p->stride, p->yblen);
1782 93834 idx = mc_subpel(s, block, src, dstx, dsty, 1, plane);
1783
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 93834 if (s->biweight_func) {
1784 /* fixme: +32 is a quick hack */
1785 ✗ s->put_pixels_tab[idx](s->mcscratch + 32, src, p->stride, p->yblen);
1786 ✗ s->biweight_func(s->mcscratch, s->mcscratch+32, p->stride, s->weight_log2denom,
1787 ✗ s->weight[0], s->weight[1], p->yblen);
1788 } else
1789 93834 s->avg_pixels_tab[idx](s->mcscratch, src, p->stride, p->yblen);
1790 93834 break;
1791 }
1792 105618 s->add_obmc(mctmp, s->mcscratch, p->stride, obmc_weight, p->yblen);
1793 }
1794
1795 2697 static void mc_row(DiracContext *s, DiracBlock *block, uint16_t *mctmp, int plane, int dsty)
1796 {
1797 2697 Plane *p = &s->plane[plane];
1798 2697 int x, dstx = p->xbsep - p->xoffset;
1799
1800 2697 block_mc(s, block, mctmp, s->obmc_weight[0], plane, -p->xoffset, dsty);
1801 2697 mctmp += p->xbsep;
1802
1803
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 105183 for (x = 1; x < s->blwidth-1; x++) {
1804 102486 block_mc(s, block+x, mctmp, s->obmc_weight[1], plane, dstx, dsty);
1805 102486 dstx += p->xbsep;
1806 102486 mctmp += p->xbsep;
1807 }
1808 2697 block_mc(s, block+x, mctmp, s->obmc_weight[2], plane, dstx, dsty);
1809 2697 }
1810
1811 87 static void select_dsp_funcs(DiracContext *s, int width, int height, int xblen, int yblen)
1812 {
1813 87 int idx = 0;
1814
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 87 if (xblen > 8)
1815 29 idx = 1;
1816
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 87 if (xblen > 16)
1817 ✗ idx = 2;
1818
1819 87 memcpy(s->put_pixels_tab, s->diracdsp.put_dirac_pixels_tab[idx], sizeof(s->put_pixels_tab));
1820 87 memcpy(s->avg_pixels_tab, s->diracdsp.avg_dirac_pixels_tab[idx], sizeof(s->avg_pixels_tab));
1821 87 s->add_obmc = s->diracdsp.add_dirac_obmc[idx];
1822
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 87 if (s->weight_log2denom > 1 || s->weight[0] != 1 || s->weight[1] != 1) {
1823 ✗ s->weight_func = s->diracdsp.weight_dirac_pixels_tab[idx];
1824 ✗ s->biweight_func = s->diracdsp.biweight_dirac_pixels_tab[idx];
1825 } else {
1826 87 s->weight_func = NULL;
1827 87 s->biweight_func = NULL;
1828 }
1829 87 }
1830
1831 171 static int interpolate_refplane(DiracContext *s, DiracFrame *ref, int plane, int width, int height)
1832 {
1833 /* chroma allocates an edge of 8 when subsampled
1834 which for 4:2:2 means an h edge of 16 and v edge of 8
1835 just use 8 for everything for the moment */
1836 171 int i, edge = EDGE_WIDTH/2;
1837
1838 171 ref->hpel[plane][0] = ref->avframe->data[plane];
1839 171 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 */
1840
1841 /* no need for hpel if we only have fpel vectors */
1842
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 171 if (!s->mv_precision)
1843 171 return 0;
1844
1845 ✗ for (i = 1; i < 4; i++) {
1846 ✗ if (!ref->hpel_base[plane][i])
1847 ✗ ref->hpel_base[plane][i] = av_malloc((height+2*edge) * ref->avframe->linesize[plane] + 32);
1848 ✗ if (!ref->hpel_base[plane][i]) {
1849 ✗ return AVERROR(ENOMEM);
1850 }
1851 /* we need to be 16-byte aligned even for chroma */
1852 ✗ ref->hpel[plane][i] = ref->hpel_base[plane][i] + edge*ref->avframe->linesize[plane] + 16;
1853 }
1854
1855 ✗ if (!ref->interpolated[plane]) {
1856 ✗ s->diracdsp.dirac_hpel_filter(ref->hpel[plane][1], ref->hpel[plane][2],
1857 ✗ ref->hpel[plane][3], ref->hpel[plane][0],
1858 ✗ ref->avframe->linesize[plane], width, height);
1859 ✗ s->mpvencdsp.draw_edges(ref->hpel[plane][1], ref->avframe->linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM);
1860 ✗ s->mpvencdsp.draw_edges(ref->hpel[plane][2], ref->avframe->linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM);
1861 ✗ s->mpvencdsp.draw_edges(ref->hpel[plane][3], ref->avframe->linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM);
1862 }
1863 ✗ ref->interpolated[plane] = 1;
1864
1865 ✗ return 0;
1866 }
1867
1868 /**
1869 * Dirac Specification ->
1870 * 13.0 Transform data syntax. transform_data()
1871 */
1872 260 static int dirac_decode_frame_internal(DiracContext *s)
1873 {
1874 DWTContext d;
1875 int y, i, comp, dsty;
1876 int ret;
1877
1878
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 260 if (s->low_delay) {
1879 /* [DIRAC_STD] 13.5.1 low_delay_transform_data() */
1880
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 229 if (!s->hq_picture) {
1881
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 124 for (comp = 0; comp < 3; comp++) {
1882 93 Plane *p = &s->plane[comp];
1883 93 memset(p->idwt.buf, 0, p->idwt.stride * p->idwt.height);
1884 }
1885 }
1886
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 229 if (!s->zero_res) {
1887
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 229 if ((ret = decode_lowdelay(s)) < 0)
1888 ✗ return ret;
1889 }
1890 }
1891
1892
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 1040 for (comp = 0; comp < 3; comp++) {
1893 780 Plane *p = &s->plane[comp];
1894 780 uint8_t *frame = s->current_picture->avframe->data[comp];
1895
1896 /* FIXME: small resolutions */
1897
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 3900 for (i = 0; i < 4; i++)
1898 3120 s->edge_emu_buffer[i] = s->edge_emu_buffer_base + i*FFALIGN(p->width, 16);
1899
1900
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 780 if (!s->zero_res && !s->low_delay)
1901 {
1902 93 memset(p->idwt.buf, 0, p->idwt.stride * p->idwt.height);
1903 93 ret = decode_component(s, comp); /* [DIRAC_STD] 13.4.1 core_transform_data() */
1904
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 93 if (ret < 0)
1905 ✗ return ret;
1906 }
1907 780 ret = ff_spatial_idwt_init(&d, &p->idwt, s->wavelet_idx+2,
1908 780 s->wavelet_depth, s->bit_depth);
1909
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 780 if (ret < 0)
1910 ✗ return ret;
1911
1912
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 780 if (!s->num_refs) { /* intra */
1913
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 11436 for (y = 0; y < p->height; y += 16) {
1914 10743 int idx = (s->bit_depth - 8) >> 1;
1915 10743 ff_spatial_idwt_slice2(&d, y+16); /* decode */
1916 10743 s->diracdsp.put_signed_rect_clamped[idx](frame + y*p->stride,
1917 10743 p->stride,
1918 10743 p->idwt.buf + y*p->idwt.stride,
1919 p->idwt.stride, p->width, 16);
1920 }
1921 } else { /* inter */
1922 87 int rowheight = p->ybsep*p->stride;
1923
1924 87 select_dsp_funcs(s, p->width, p->height, p->xblen, p->yblen);
1925
1926
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 258 for (i = 0; i < s->num_refs; i++) {
1927 171 int ret = interpolate_refplane(s, s->ref_pics[i], comp, p->width, p->height);
1928
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 171 if (ret < 0)
1929 ✗ return ret;
1930 }
1931
1932 87 memset(s->mctmp, 0, 4*p->yoffset*p->stride);
1933
1934 87 dsty = -p->yoffset;
1935
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 2784 for (y = 0; y < s->blheight; y++) {
1936 2784 int h = 0,
1937 2784 start = FFMAX(dsty, 0);
1938 2784 uint16_t *mctmp = s->mctmp + y*rowheight;
1939 2784 DiracBlock *blocks = s->blmotion + y*s->blwidth;
1940
1941 2784 init_obmc_weights(s, p, y);
1942
1943
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 2784 if (y == s->blheight-1 || start+p->ybsep > p->height)
1944 174 h = p->height - start;
1945 else
1946 2610 h = p->ybsep - (start - dsty);
1947
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 2784 if (h < 0)
1948 87 break;
1949
1950 2697 memset(mctmp+2*p->yoffset*p->stride, 0, 2*rowheight);
1951 2697 mc_row(s, blocks, mctmp, comp, dsty);
1952
1953 2697 mctmp += (start - dsty)*p->stride + p->xoffset;
1954 2697 ff_spatial_idwt_slice2(&d, start + h); /* decode */
1955 /* NOTE: add_rect_clamped hasn't been templated hence the shifts.
1956 * idwt.stride is passed as pixels, not in bytes as in the rest of the decoder */
1957 2697 s->diracdsp.add_rect_clamped(frame + start*p->stride, mctmp, p->stride,
1958 2697 (int16_t*)(p->idwt.buf) + start*(p->idwt.stride >> 1), (p->idwt.stride >> 1), p->width, h);
1959
1960 2697 dsty += p->ybsep;
1961 }
1962 }
1963 }
1964
1965
1966 260 return 0;
1967 }
1968
1969 260 static int get_buffer_with_edge(AVCodecContext *avctx, AVFrame *f, int flags)
1970 {
1971 int ret, i;
1972 int chroma_x_shift, chroma_y_shift;
1973 260 ret = av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_x_shift,
1974 &chroma_y_shift);
1975
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 260 if (ret < 0)
1976 ✗ return ret;
1977
1978 260 f->width = avctx->width + 2 * EDGE_WIDTH;
1979 260 f->height = avctx->height + 2 * EDGE_WIDTH + 2;
1980 260 ret = ff_get_buffer(avctx, f, flags);
1981
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 260 if (ret < 0)
1982 ✗ return ret;
1983
1984
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 1040 for (i = 0; f->data[i]; i++) {
1985
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 780 int offset = (EDGE_WIDTH >> (i && i<3 ? chroma_y_shift : 0)) *
1986 780 f->linesize[i] + 32;
1987 780 f->data[i] += offset;
1988 }
1989 260 f->width = avctx->width;
1990 260 f->height = avctx->height;
1991
1992 260 return 0;
1993 }
1994
1995 /**
1996 * Dirac Specification ->
1997 * 11.1.1 Picture Header. picture_header()
1998 */
1999 260 static int dirac_decode_picture_header(DiracContext *s)
2000 {
2001 unsigned retire, picnum;
2002 int i, j, ret;
2003 int64_t refdist, refnum;
2004 260 GetBitContext *gb = &s->gb;
2005
2006 /* [DIRAC_STD] 11.1.1 Picture Header. picture_header() PICTURE_NUM */
2007 260 picnum = s->current_picture->picture_number = get_bits_long(gb, 32);
2008
2009
2010 260 av_log(s->avctx,AV_LOG_DEBUG,"PICTURE_NUM: %d\n",picnum);
2011
2012 /* if this is the first keyframe after a sequence header, start our
2013 reordering from here */
2014
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 260 if (s->frame_number < 0)
2015 70 s->frame_number = picnum;
2016
2017 260 s->ref_pics[0] = s->ref_pics[1] = NULL;
2018
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 317 for (i = 0; i < s->num_refs; i++) {
2019 57 refnum = (picnum + dirac_get_se_golomb(gb)) & 0xFFFFFFFF;
2020 57 refdist = INT64_MAX;
2021
2022 /* find the closest reference to the one we want */
2023 /* Jordi: this is needed if the referenced picture hasn't yet arrived */
2024
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 184 for (j = 0; j < MAX_REFERENCE_FRAMES && refdist; j++)
2025
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 127 if (s->ref_frames[j]
2026
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 127 && FFABS(s->ref_frames[j]->picture_number - refnum) < refdist) {
2027 127 s->ref_pics[i] = s->ref_frames[j];
2028 127 refdist = FFABS(s->ref_frames[j]->picture_number - refnum);
2029 }
2030
2031
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 57 if (!s->ref_pics[i] || refdist)
2032 ✗ av_log(s->avctx, AV_LOG_DEBUG, "Reference not found\n");
2033
2034 /* if there were no references at all, allocate one */
2035
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 57 if (!s->ref_pics[i])
2036 ✗ for (j = 0; j < MAX_FRAMES; j++)
2037 ✗ if (!s->all_frames[j].avframe->data[0]) {
2038 ✗ s->ref_pics[i] = &s->all_frames[j];
2039 ✗ ret = get_buffer_with_edge(s->avctx, s->ref_pics[i]->avframe, AV_GET_BUFFER_FLAG_REF);
2040 ✗ if (ret < 0)
2041 ✗ return ret;
2042 ✗ break;
2043 }
2044
2045
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 57 if (!s->ref_pics[i]) {
2046 ✗ av_log(s->avctx, AV_LOG_ERROR, "Reference could not be allocated\n");
2047 ✗ return AVERROR_INVALIDDATA;
2048 }
2049
2050 }
2051
2052 /* retire the reference frames that are not used anymore */
2053
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 260 if (s->current_picture->reference) {
2054 10 retire = (picnum + dirac_get_se_golomb(gb)) & 0xFFFFFFFF;
2055
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 10 if (retire != picnum) {
2056 6 DiracFrame *retire_pic = remove_frame(s->ref_frames, retire);
2057
2058
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 6 if (retire_pic)
2059 6 retire_pic->reference &= DELAYED_PIC_REF;
2060 else
2061 ✗ av_log(s->avctx, AV_LOG_DEBUG, "Frame to retire not found\n");
2062 }
2063
2064 /* if reference array is full, remove the oldest as per the spec */
2065
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 10 while (add_frame(s->ref_frames, MAX_REFERENCE_FRAMES, s->current_picture)) {
2066 ✗ av_log(s->avctx, AV_LOG_ERROR, "Reference frame overflow\n");
2067 ✗ remove_frame(s->ref_frames, s->ref_frames[0]->picture_number)->reference &= DELAYED_PIC_REF;
2068 }
2069 }
2070
2071
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 260 if (s->num_refs) {
2072 29 ret = dirac_unpack_prediction_parameters(s); /* [DIRAC_STD] 11.2 Picture Prediction Data. picture_prediction() */
2073
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 29 if (ret < 0)
2074 ✗ return ret;
2075 29 ret = dirac_unpack_block_motion_data(s); /* [DIRAC_STD] 12. Block motion data syntax */
2076
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 29 if (ret < 0)
2077 ✗ return ret;
2078 }
2079 260 ret = dirac_unpack_idwt_params(s); /* [DIRAC_STD] 11.3 Wavelet transform data */
2080
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 260 if (ret < 0)
2081 ✗ return ret;
2082
2083 260 init_planes(s);
2084 260 return 0;
2085 }
2086
2087 36 static int get_delayed_pic(DiracContext *s, AVFrame *picture, int *got_frame)
2088 {
2089 36 DiracFrame *out = s->delay_frames[0];
2090 36 int i, out_idx = 0;
2091 int ret;
2092
2093 /* find frame with lowest picture number */
2094
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 36 for (i = 1; s->delay_frames[i]; i++)
2095 ✗ if (s->delay_frames[i]->picture_number < out->picture_number) {
2096 ✗ out = s->delay_frames[i];
2097 ✗ out_idx = i;
2098 }
2099
2100
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 37 for (i = out_idx; s->delay_frames[i]; i++)
2101 1 s->delay_frames[i] = s->delay_frames[i+1];
2102
2103
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 36 if (out) {
2104 1 out->reference ^= DELAYED_PIC_REF;
2105
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 1 if((ret = av_frame_ref(picture, out->avframe)) < 0)
2106 ✗ return ret;
2107 1 *got_frame = 1;
2108 }
2109
2110 36 return 0;
2111 }
2112
2113 /**
2114 * Dirac Specification ->
2115 * 9.6 Parse Info Header Syntax. parse_info()
2116 * 4 byte start code + byte parse code + 4 byte size + 4 byte previous size
2117 */
2118 #define DATA_UNIT_HEADER_SIZE 13
2119
2120 /* [DIRAC_STD] dirac_decode_data_unit makes reference to the while defined in 9.3
2121 inside the function parse_sequence() */
2122 757 static int dirac_decode_data_unit(AVCodecContext *avctx, const uint8_t *buf, int size)
2123 {
2124 757 DiracContext *s = avctx->priv_data;
2125 757 DiracFrame *pic = NULL;
2126 AVDiracSeqHeader *dsh;
2127 int ret, i;
2128 uint8_t parse_code;
2129 unsigned tmp;
2130
2131
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 757 if (size < DATA_UNIT_HEADER_SIZE)
2132 ✗ return AVERROR_INVALIDDATA;
2133
2134 757 parse_code = buf[4];
2135
2136 757 init_get_bits(&s->gb, &buf[13], 8*(size - DATA_UNIT_HEADER_SIZE));
2137
2138
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 757 if (parse_code == DIRAC_PCODE_SEQ_HEADER) {
2139
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 231 if (s->seen_sequence_header)
2140 161 return 0;
2141
2142 /* [DIRAC_STD] 10. Sequence header */
2143 70 ret = av_dirac_parse_sequence_header(&dsh, buf + DATA_UNIT_HEADER_SIZE, size - DATA_UNIT_HEADER_SIZE, avctx);
2144
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 70 if (ret < 0) {
2145 ✗ av_log(avctx, AV_LOG_ERROR, "error parsing sequence header");
2146 ✗ return ret;
2147 }
2148
2149
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 70 if (CALC_PADDING((int64_t)dsh->width, MAX_DWT_LEVELS) * CALC_PADDING((int64_t)dsh->height, MAX_DWT_LEVELS) * 5LL > avctx->max_pixels)
2150 ✗ ret = AVERROR(ERANGE);
2151
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 70 if (ret >= 0)
2152 70 ret = ff_set_dimensions(avctx, dsh->width, dsh->height);
2153
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 70 if (ret < 0) {
2154 ✗ av_freep(&dsh);
2155 ✗ return ret;
2156 }
2157
2158 70 ff_set_sar(avctx, dsh->sample_aspect_ratio);
2159 70 avctx->pix_fmt = dsh->pix_fmt;
2160 70 avctx->color_range = dsh->color_range;
2161 70 avctx->color_trc = dsh->color_trc;
2162 70 avctx->color_primaries = dsh->color_primaries;
2163 70 avctx->colorspace = dsh->colorspace;
2164 70 avctx->profile = dsh->profile;
2165 70 avctx->level = dsh->level;
2166 70 avctx->framerate = dsh->framerate;
2167 70 s->bit_depth = dsh->bit_depth;
2168 70 s->version.major = dsh->version.major;
2169 70 s->version.minor = dsh->version.minor;
2170 70 s->seq = *dsh;
2171 70 av_freep(&dsh);
2172
2173 70 s->pshift = s->bit_depth > 8;
2174
2175 70 ret = av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt,
2176 &s->chroma_x_shift,
2177 &s->chroma_y_shift);
2178
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 70 if (ret < 0)
2179 ✗ return ret;
2180
2181 70 ret = alloc_sequence_buffers(s);
2182
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 70 if (ret < 0)
2183 ✗ return ret;
2184
2185 70 s->seen_sequence_header = 1;
2186
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 526 } else if (parse_code == DIRAC_PCODE_END_SEQ) { /* [DIRAC_STD] End of Sequence */
2187 ✗ free_sequence_buffers(s);
2188 ✗ s->seen_sequence_header = 0;
2189
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 526 } else if (parse_code == DIRAC_PCODE_AUX) {
2190
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 266 if (buf[13] == 1) { /* encoder implementation/version */
2191 int ver[3];
2192 /* versions older than 1.0.8 don't store quant delta for
2193 subbands with only one codeblock */
2194
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 4 if (sscanf(buf+14, "Schroedinger %d.%d.%d", ver, ver+1, ver+2) == 3)
2195
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 4 if (ver[0] == 1 && ver[1] == 0 && ver[2] <= 7)
2196 ✗ s->old_delta_quant = 1;
2197 }
2198
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 260 } else if (parse_code & 0x8) { /* picture data unit */
2199
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 260 if (!s->seen_sequence_header) {
2200 ✗ av_log(avctx, AV_LOG_DEBUG, "Dropping frame without sequence header\n");
2201 ✗ return AVERROR_INVALIDDATA;
2202 }
2203
2204 /* find an unused frame */
2205
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 3900 for (i = 0; i < MAX_FRAMES; i++)
2206
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 3640 if (s->all_frames[i].avframe->data[0] == NULL)
2207 3559 pic = &s->all_frames[i];
2208
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 260 if (!pic) {
2209 ✗ av_log(avctx, AV_LOG_ERROR, "framelist full\n");
2210 ✗ return AVERROR_INVALIDDATA;
2211 }
2212
2213 260 av_frame_unref(pic->avframe);
2214
2215 /* [DIRAC_STD] Defined in 9.6.1 ... */
2216 260 tmp = parse_code & 0x03; /* [DIRAC_STD] num_refs() */
2217
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 260 if (tmp > 2) {
2218 ✗ av_log(avctx, AV_LOG_ERROR, "num_refs of 3\n");
2219 ✗ return AVERROR_INVALIDDATA;
2220 }
2221 260 s->num_refs = tmp;
2222 260 s->is_arith = (parse_code & 0x48) == 0x08; /* [DIRAC_STD] using_ac() */
2223 260 s->low_delay = (parse_code & 0x88) == 0x88; /* [DIRAC_STD] is_low_delay() */
2224 260 s->core_syntax = (parse_code & 0x88) == 0x08; /* [DIRAC_STD] is_core_syntax() */
2225 260 s->ld_picture = (parse_code & 0xF8) == 0xC8; /* [DIRAC_STD] is_ld_picture() */
2226 260 s->hq_picture = (parse_code & 0xF8) == 0xE8; /* [DIRAC_STD] is_hq_picture() */
2227 260 s->dc_prediction = (parse_code & 0x28) == 0x08; /* [DIRAC_STD] using_dc_prediction() */
2228 260 pic->reference = (parse_code & 0x0C) == 0x0C; /* [DIRAC_STD] is_reference() */
2229
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 260 if (s->num_refs == 0) /* [DIRAC_STD] is_intra() */
2230 231 pic->avframe->flags |= AV_FRAME_FLAG_KEY;
2231 else
2232 29 pic->avframe->flags &= ~AV_FRAME_FLAG_KEY;
2233 260 pic->avframe->pict_type = s->num_refs + 1; /* Definition of AVPictureType in avutil.h */
2234
2235 /* VC-2 Low Delay has a different parse code than the Dirac Low Delay */
2236
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 260 if (s->version.minor == 2 && parse_code == 0x88)
2237 31 s->ld_picture = 1;
2238
2239
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 260 if (s->low_delay && !(s->ld_picture || s->hq_picture) ) {
2240 ✗ av_log(avctx, AV_LOG_ERROR, "Invalid low delay flag\n");
2241 ✗ return AVERROR_INVALIDDATA;
2242 }
2243
2244
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 260 if ((ret = get_buffer_with_edge(avctx, pic->avframe, (parse_code & 0x0C) == 0x0C ? AV_GET_BUFFER_FLAG_REF : 0)) < 0)
2245 ✗ return ret;
2246 260 s->current_picture = pic;
2247 260 s->plane[0].stride = pic->avframe->linesize[0];
2248 260 s->plane[1].stride = pic->avframe->linesize[1];
2249 260 s->plane[2].stride = pic->avframe->linesize[2];
2250
2251
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 260 if (alloc_buffers(s, FFMAX3(FFABS(s->plane[0].stride), FFABS(s->plane[1].stride), FFABS(s->plane[2].stride))) < 0)
2252 ✗ return AVERROR(ENOMEM);
2253
2254 /* [DIRAC_STD] 11.1 Picture parse. picture_parse() */
2255 260 ret = dirac_decode_picture_header(s);
2256
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 260 if (ret < 0)
2257 ✗ return ret;
2258
2259 /* [DIRAC_STD] 13.0 Transform data syntax. transform_data() */
2260 260 ret = dirac_decode_frame_internal(s);
2261
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 260 if (ret < 0)
2262 ✗ return ret;
2263 }
2264 596 return 0;
2265 }
2266
2267 298 static int dirac_decode_frame(AVCodecContext *avctx, AVFrame *picture,
2268 int *got_frame, AVPacket *pkt)
2269 {
2270 298 DiracContext *s = avctx->priv_data;
2271 298 const uint8_t *buf = pkt->data;
2272 298 int buf_size = pkt->size;
2273 298 int i, buf_idx = 0;
2274 int ret;
2275 unsigned data_unit_size;
2276
2277 /* release unused frames */
2278
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 4470 for (i = 0; i < MAX_FRAMES; i++)
2279
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 4172 if (s->all_frames[i].avframe->data[0] && !s->all_frames[i].reference) {
2280 222 av_frame_unref(s->all_frames[i].avframe);
2281 222 memset(s->all_frames[i].interpolated, 0, sizeof(s->all_frames[i].interpolated));
2282 }
2283
2284 298 s->current_picture = NULL;
2285 298 *got_frame = 0;
2286
2287 /* end of stream, so flush delayed pics */
2288
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 298 if (buf_size == 0)
2289 36 return get_delayed_pic(s, picture, got_frame);
2290
2291 for (;;) {
2292 /*[DIRAC_STD] Here starts the code from parse_info() defined in 9.6
2293 [DIRAC_STD] PARSE_INFO_PREFIX = "BBCD" as defined in ISO/IEC 646
2294 BBCD start code search */
2295
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 1019 for (; buf_idx + DATA_UNIT_HEADER_SIZE < buf_size; buf_idx++) {
2296
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 757 if (buf[buf_idx ] == 'B' && buf[buf_idx+1] == 'B' &&
2297
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 757 buf[buf_idx+2] == 'C' && buf[buf_idx+3] == 'D')
2298 757 break;
2299 }
2300 /* BBCD found or end of data */
2301
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 1019 if (buf_idx + DATA_UNIT_HEADER_SIZE >= buf_size)
2302 262 break;
2303
2304 757 data_unit_size = AV_RB32(buf+buf_idx+5);
2305
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 757 if (data_unit_size > buf_size - buf_idx || !data_unit_size) {
2306 ✗ if(data_unit_size > buf_size - buf_idx)
2307 ✗ av_log(s->avctx, AV_LOG_ERROR,
2308 "Data unit with size %d is larger than input buffer, discarding\n",
2309 data_unit_size);
2310 ✗ buf_idx += 4;
2311 ✗ continue;
2312 }
2313 /* [DIRAC_STD] dirac_decode_data_unit makes reference to the while defined in 9.3 inside the function parse_sequence() */
2314 757 ret = dirac_decode_data_unit(avctx, buf+buf_idx, data_unit_size);
2315
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 757 if (ret < 0)
2316 {
2317 ✗ av_log(s->avctx, AV_LOG_ERROR,"Error in dirac_decode_data_unit\n");
2318 ✗ return ret;
2319 }
2320 757 buf_idx += data_unit_size;
2321 }
2322
2323
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 262 if (!s->current_picture)
2324 2 return buf_size;
2325
2326
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 260 if (s->current_picture->picture_number > s->frame_number) {
2327 8 DiracFrame *delayed_frame = remove_frame(s->delay_frames, s->frame_number);
2328
2329 8 s->current_picture->reference |= DELAYED_PIC_REF;
2330
2331
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 8 if (add_frame(s->delay_frames, MAX_DELAY, s->current_picture)) {
2332 ✗ unsigned min_num = s->delay_frames[0]->picture_number;
2333 /* Too many delayed frames, so we display the frame with the lowest pts */
2334 ✗ av_log(avctx, AV_LOG_ERROR, "Delay frame overflow\n");
2335
2336 ✗ for (i = 1; s->delay_frames[i]; i++)
2337 ✗ if (s->delay_frames[i]->picture_number < min_num)
2338 ✗ min_num = s->delay_frames[i]->picture_number;
2339
2340 ✗ delayed_frame = remove_frame(s->delay_frames, min_num);
2341 ✗ add_frame(s->delay_frames, MAX_DELAY, s->current_picture);
2342 }
2343
2344
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 8 if (delayed_frame) {
2345 7 delayed_frame->reference ^= DELAYED_PIC_REF;
2346
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 7 if((ret = av_frame_ref(picture, delayed_frame->avframe)) < 0)
2347 ✗ return ret;
2348 7 s->frame_number = delayed_frame->picture_number + 1LL;
2349 7 *got_frame = 1;
2350 }
2351
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 252 } else if (s->current_picture->picture_number == s->frame_number) {
2352 /* The right frame at the right time :-) */
2353
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 252 if((ret = av_frame_ref(picture, s->current_picture->avframe)) < 0)
2354 ✗ return ret;
2355 252 s->frame_number = s->current_picture->picture_number + 1LL;
2356 252 *got_frame = 1;
2357 }
2358
2359 260 return buf_idx;
2360 }
2361
2362 const FFCodec ff_dirac_decoder = {
2363 .p.name = "dirac",
2364 CODEC_LONG_NAME("BBC Dirac VC-2"),
2365 .p.type = AVMEDIA_TYPE_VIDEO,
2366 .p.id = AV_CODEC_ID_DIRAC,
2367 .priv_data_size = sizeof(DiracContext),
2368 .init = dirac_decode_init,
2369 .close = dirac_decode_end,
2370 FF_CODEC_DECODE_CB(dirac_decode_frame),
2371 .p.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS | AV_CODEC_CAP_DR1,
2372 .flush = dirac_decode_flush,
2373 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
2374 };
2375