FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/diracdec.c
Date: 2022-07-05 19:52:29
Exec Total Coverage
Lines: 904 1174 77.0%
Branches: 568 855 66.4%

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_internal.h"
30 #include "libavutil/pixdesc.h"
31 #include "libavutil/thread.h"
32 #include "avcodec.h"
33 #include "get_bits.h"
34 #include "bytestream.h"
35 #include "codec_internal.h"
36 #include "internal.h"
37 #include "golomb.h"
38 #include "dirac_arith.h"
39 #include "dirac_vlc.h"
40 #include "mpeg12data.h"
41 #include "mpegpicture.h"
42 #include "mpegvideoencdsp.h"
43 #include "dirac_dwt.h"
44 #include "dirac.h"
45 #include "diractab.h"
46 #include "diracdsp.h"
47 #include "videodsp.h"
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 } DiracFrame;
83
84 typedef struct {
85 union {
86 int16_t mv[2][2];
87 int16_t dc[3];
88 } u; /* anonymous unions aren't in C99 :( */
89 uint8_t ref;
90 } DiracBlock;
91
92 typedef struct SubBand {
93 int level;
94 int orientation;
95 int stride; /* in bytes */
96 int width;
97 int height;
98 int pshift;
99 int quant;
100 uint8_t *ibuf;
101 struct SubBand *parent;
102
103 /* for low delay */
104 unsigned length;
105 const uint8_t *coeff_data;
106 } SubBand;
107
108 typedef struct Plane {
109 DWTPlane idwt;
110
111 int width;
112 int height;
113 ptrdiff_t stride;
114
115 /* block length */
116 uint8_t xblen;
117 uint8_t yblen;
118 /* block separation (block n+1 starts after this many pixels in block n) */
119 uint8_t xbsep;
120 uint8_t ybsep;
121 /* amount of overspill on each edge (half of the overlap between blocks) */
122 uint8_t xoffset;
123 uint8_t yoffset;
124
125 SubBand band[MAX_DWT_LEVELS][4];
126 } Plane;
127
128 /* Used by Low Delay and High Quality profiles */
129 typedef struct DiracSlice {
130 GetBitContext gb;
131 int slice_x;
132 int slice_y;
133 int bytes;
134 } DiracSlice;
135
136 typedef struct DiracContext {
137 AVCodecContext *avctx;
138 MpegvideoEncDSPContext mpvencdsp;
139 VideoDSPContext vdsp;
140 DiracDSPContext diracdsp;
141 DiracVersionInfo version;
142 GetBitContext gb;
143 AVDiracSeqHeader seq;
144 int seen_sequence_header;
145 int64_t frame_number; /* number of the next frame to display */
146 Plane plane[3];
147 int chroma_x_shift;
148 int chroma_y_shift;
149
150 int bit_depth; /* bit depth */
151 int pshift; /* pixel shift = bit_depth > 8 */
152
153 int zero_res; /* zero residue flag */
154 int is_arith; /* whether coeffs use arith or golomb coding */
155 int core_syntax; /* use core syntax only */
156 int low_delay; /* use the low delay syntax */
157 int hq_picture; /* high quality picture, enables low_delay */
158 int ld_picture; /* use low delay picture, turns on low_delay */
159 int dc_prediction; /* has dc prediction */
160 int globalmc_flag; /* use global motion compensation */
161 int num_refs; /* number of reference pictures */
162
163 /* wavelet decoding */
164 unsigned wavelet_depth; /* depth of the IDWT */
165 unsigned wavelet_idx;
166
167 /**
168 * schroedinger older than 1.0.8 doesn't store
169 * quant delta if only one codebook exists in a band
170 */
171 unsigned old_delta_quant;
172 unsigned codeblock_mode;
173
174 unsigned num_x; /* number of horizontal slices */
175 unsigned num_y; /* number of vertical slices */
176
177 uint8_t *thread_buf; /* Per-thread buffer for coefficient storage */
178 int threads_num_buf; /* Current # of buffers allocated */
179 int thread_buf_size; /* Each thread has a buffer this size */
180
181 DiracSlice *slice_params_buf;
182 int slice_params_num_buf;
183
184 struct {
185 unsigned width;
186 unsigned height;
187 } codeblock[MAX_DWT_LEVELS+1];
188
189 struct {
190 AVRational bytes; /* average bytes per slice */
191 uint8_t quant[MAX_DWT_LEVELS][4]; /* [DIRAC_STD] E.1 */
192 } lowdelay;
193
194 struct {
195 unsigned prefix_bytes;
196 uint64_t size_scaler;
197 } highquality;
198
199 struct {
200 int pan_tilt[2]; /* pan/tilt vector */
201 int zrs[2][2]; /* zoom/rotate/shear matrix */
202 int perspective[2]; /* perspective vector */
203 unsigned zrs_exp;
204 unsigned perspective_exp;
205 } globalmc[2];
206
207 /* motion compensation */
208 uint8_t mv_precision; /* [DIRAC_STD] REFS_WT_PRECISION */
209 int16_t weight[2]; /* [DIRAC_STD] REF1_WT and REF2_WT */
210 unsigned weight_log2denom; /* [DIRAC_STD] REFS_WT_PRECISION */
211
212 int blwidth; /* number of blocks (horizontally) */
213 int blheight; /* number of blocks (vertically) */
214 int sbwidth; /* number of superblocks (horizontally) */
215 int sbheight; /* number of superblocks (vertically) */
216
217 uint8_t *sbsplit;
218 DiracBlock *blmotion;
219
220 uint8_t *edge_emu_buffer[4];
221 uint8_t *edge_emu_buffer_base;
222
223 uint16_t *mctmp; /* buffer holding the MC data multiplied by OBMC weights */
224 uint8_t *mcscratch;
225 int buffer_stride;
226
227 DECLARE_ALIGNED(16, uint8_t, obmc_weight)[3][MAX_BLOCKSIZE*MAX_BLOCKSIZE];
228
229 void (*put_pixels_tab[4])(uint8_t *dst, const uint8_t *src[5], int stride, int h);
230 void (*avg_pixels_tab[4])(uint8_t *dst, const uint8_t *src[5], int stride, int h);
231 void (*add_obmc)(uint16_t *dst, const uint8_t *src, int stride, const uint8_t *obmc_weight, int yblen);
232 dirac_weight_func weight_func;
233 dirac_biweight_func biweight_func;
234
235 DiracFrame *current_picture;
236 DiracFrame *ref_pics[2];
237
238 DiracFrame *ref_frames[MAX_REFERENCE_FRAMES+1];
239 DiracFrame *delay_frames[MAX_DELAY+1];
240 DiracFrame all_frames[MAX_FRAMES];
241 } DiracContext;
242
243 enum dirac_subband {
244 subband_ll = 0,
245 subband_hl = 1,
246 subband_lh = 2,
247 subband_hh = 3,
248 subband_nb,
249 };
250
251 /* magic number division by 3 from schroedinger */
252 55371 static inline int divide3(int x)
253 {
254 55371 return (int)((x+1U)*21845 + 10922) >> 16;
255 }
256
257 14 static DiracFrame *remove_frame(DiracFrame *framelist[], int picnum)
258 {
259 14 DiracFrame *remove_pic = NULL;
260 14 int i, remove_idx = -1;
261
262
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39 for (i = 0; framelist[i]; i++)
263
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25 if (framelist[i]->avframe->display_picture_number == picnum) {
264 13 remove_pic = framelist[i];
265 13 remove_idx = i;
266 }
267
268
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14 if (remove_pic)
269
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32 for (i = remove_idx; framelist[i]; i++)
270 19 framelist[i] = framelist[i+1];
271
272 14 return remove_pic;
273 }
274
275 18 static int add_frame(DiracFrame *framelist[], int maxframes, DiracFrame *frame)
276 {
277 int i;
278
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33 for (i = 0; i < maxframes; i++)
279
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33 if (!framelist[i]) {
280 18 framelist[i] = frame;
281 18 return 0;
282 }
283 return -1;
284 }
285
286 70 static int alloc_sequence_buffers(DiracContext *s)
287 {
288 70 int sbwidth = DIVRNDUP(s->seq.width, 4);
289 70 int sbheight = DIVRNDUP(s->seq.height, 4);
290 int i, w, h, top_padding;
291
292 /* todo: think more about this / use or set Plane here */
293
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280 for (i = 0; i < 3; i++) {
294
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210 int max_xblen = MAX_BLOCKSIZE >> (i ? s->chroma_x_shift : 0);
295
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210 int max_yblen = MAX_BLOCKSIZE >> (i ? s->chroma_y_shift : 0);
296
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210 w = s->seq.width >> (i ? s->chroma_x_shift : 0);
297
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210 h = s->seq.height >> (i ? s->chroma_y_shift : 0);
298
299 /* we allocate the max we support here since num decompositions can
300 * change from frame to frame. Stride is aligned to 16 for SIMD, and
301 * 1<<MAX_DWT_LEVELS top padding to avoid if(y>0) in arith decoding
302 * MAX_BLOCKSIZE padding for MC: blocks can spill up to half of that
303 * on each side */
304
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210 top_padding = FFMAX(1<<MAX_DWT_LEVELS, max_yblen/2);
305 210 w = FFALIGN(CALC_PADDING(w, MAX_DWT_LEVELS), 8); /* FIXME: Should this be 16 for SSE??? */
306 210 h = top_padding + CALC_PADDING(h, MAX_DWT_LEVELS) + max_yblen/2;
307
308 210 s->plane[i].idwt.buf_base = av_calloc(w + max_xblen, h * (2 << s->pshift));
309 210 s->plane[i].idwt.tmp = av_malloc_array((w+16), 2 << s->pshift);
310 210 s->plane[i].idwt.buf = s->plane[i].idwt.buf_base + (top_padding*w)*(2 << s->pshift);
311
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210 if (!s->plane[i].idwt.buf_base || !s->plane[i].idwt.tmp)
312 return AVERROR(ENOMEM);
313 }
314
315 /* fixme: allocate using real stride here */
316 70 s->sbsplit = av_malloc_array(sbwidth, sbheight);
317 70 s->blmotion = av_malloc_array(sbwidth, sbheight * 16 * sizeof(*s->blmotion));
318
319
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70 if (!s->sbsplit || !s->blmotion)
320 return AVERROR(ENOMEM);
321 70 return 0;
322 }
323
324 260 static int alloc_buffers(DiracContext *s, int stride)
325 {
326 260 int w = s->seq.width;
327 260 int h = s->seq.height;
328
329
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260 av_assert0(stride >= w);
330 260 stride += 64;
331
332
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260 if (s->buffer_stride >= stride)
333 190 return 0;
334 70 s->buffer_stride = 0;
335
336 70 av_freep(&s->edge_emu_buffer_base);
337 70 memset(s->edge_emu_buffer, 0, sizeof(s->edge_emu_buffer));
338 70 av_freep(&s->mctmp);
339 70 av_freep(&s->mcscratch);
340
341 70 s->edge_emu_buffer_base = av_malloc_array(stride, MAX_BLOCKSIZE);
342
343 70 s->mctmp = av_malloc_array((stride+MAX_BLOCKSIZE), (h+MAX_BLOCKSIZE) * sizeof(*s->mctmp));
344 70 s->mcscratch = av_malloc_array(stride, MAX_BLOCKSIZE);
345
346
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70 if (!s->edge_emu_buffer_base || !s->mctmp || !s->mcscratch)
347 return AVERROR(ENOMEM);
348
349 70 s->buffer_stride = stride;
350 70 return 0;
351 }
352
353 70 static void free_sequence_buffers(DiracContext *s)
354 {
355 int i, j, k;
356
357
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1050 for (i = 0; i < MAX_FRAMES; i++) {
358
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980 if (s->all_frames[i].avframe->data[0]) {
359 38 av_frame_unref(s->all_frames[i].avframe);
360 38 memset(s->all_frames[i].interpolated, 0, sizeof(s->all_frames[i].interpolated));
361 }
362
363
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364
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11760 for (k = 1; k < 4; k++)
365 8820 av_freep(&s->all_frames[i].hpel_base[j][k]);
366 }
367
368 70 memset(s->ref_frames, 0, sizeof(s->ref_frames));
369 70 memset(s->delay_frames, 0, sizeof(s->delay_frames));
370
371
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280 for (i = 0; i < 3; i++) {
372 210 av_freep(&s->plane[i].idwt.buf_base);
373 210 av_freep(&s->plane[i].idwt.tmp);
374 }
375
376 70 s->buffer_stride = 0;
377 70 av_freep(&s->sbsplit);
378 70 av_freep(&s->blmotion);
379 70 av_freep(&s->edge_emu_buffer_base);
380
381 70 av_freep(&s->mctmp);
382 70 av_freep(&s->mcscratch);
383 70 }
384
385 static AVOnce dirac_arith_init = AV_ONCE_INIT;
386
387 70 static av_cold int dirac_decode_init(AVCodecContext *avctx)
388 {
389 70 DiracContext *s = avctx->priv_data;
390 int i, ret;
391
392 70 s->avctx = avctx;
393 70 s->frame_number = -1;
394
395 70 s->thread_buf = NULL;
396 70 s->threads_num_buf = -1;
397 70 s->thread_buf_size = -1;
398
399 70 ff_diracdsp_init(&s->diracdsp);
400 70 ff_mpegvideoencdsp_init(&s->mpvencdsp, avctx);
401 70 ff_videodsp_init(&s->vdsp, 8);
402
403
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1050 for (i = 0; i < MAX_FRAMES; i++) {
404 980 s->all_frames[i].avframe = av_frame_alloc();
405
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980 if (!s->all_frames[i].avframe) {
406 while (i > 0)
407 av_frame_free(&s->all_frames[--i].avframe);
408 return AVERROR(ENOMEM);
409 }
410 }
411 70 ret = ff_thread_once(&dirac_arith_init, ff_dirac_init_arith_tables);
412
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70 if (ret != 0)
413 return AVERROR_UNKNOWN;
414
415 70 return 0;
416 }
417
418 70 static void dirac_decode_flush(AVCodecContext *avctx)
419 {
420 70 DiracContext *s = avctx->priv_data;
421 70 free_sequence_buffers(s);
422 70 s->seen_sequence_header = 0;
423 70 s->frame_number = -1;
424 70 }
425
426 70 static av_cold int dirac_decode_end(AVCodecContext *avctx)
427 {
428 70 DiracContext *s = avctx->priv_data;
429 int i;
430
431 70 dirac_decode_flush(avctx);
432
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1050 for (i = 0; i < MAX_FRAMES; i++)
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(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(DiracContext *s, SubBand *b, int is_arith)
600 {
601 int cb_x, cb_y, left, right, top, bottom;
602 DiracArith c;
603 GetBitContext gb;
604 930 int cb_width = s->codeblock[b->level + (b->orientation != subband_ll)].width;
605 930 int cb_height = s->codeblock[b->level + (b->orientation != subband_ll)].height;
606 930 int blockcnt_one = (cb_width + cb_height) == 2;
607 int ret;
608
609
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930 if (!b->length)
610 263 return 0;
611
612 667 init_get_bits8(&gb, b->coeff_data, b->length);
613
614
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667 if (is_arith)
615 667 ff_dirac_init_arith_decoder(&c, &gb, b->length);
616
617 667 top = 0;
618
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5972 for (cb_y = 0; cb_y < cb_height; cb_y++) {
619 5305 bottom = (b->height * (cb_y+1LL)) / cb_height;
620 5305 left = 0;
621
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88004 for (cb_x = 0; cb_x < cb_width; cb_x++) {
622 82699 right = (b->width * (cb_x+1LL)) / cb_width;
623 82699 ret = codeblock(s, b, &gb, &c, left, right, top, bottom, blockcnt_one, is_arith);
624
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82699 if (ret < 0)
625 return ret;
626 82699 left = right;
627 }
628 5305 top = bottom;
629 }
630
631
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667 if (b->orientation == subband_ll && s->num_refs == 0) {
632
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6 if (s->pshift) {
633 intra_dc_prediction_10(b);
634 } else {
635 6 intra_dc_prediction_8(b);
636 }
637 }
638 667 return 0;
639 }
640
641 930 static int decode_subband_arith(AVCodecContext *avctx, void *b)
642 {
643 930 DiracContext *s = avctx->priv_data;
644 930 return decode_subband_internal(s, b, 1);
645 }
646
647 static int decode_subband_golomb(AVCodecContext *avctx, void *arg)
648 {
649 DiracContext *s = avctx->priv_data;
650 SubBand **b = arg;
651 return decode_subband_internal(s, *b, 0);
652 }
653
654 /**
655 * Dirac Specification ->
656 * [DIRAC_STD] 13.4.1 core_transform_data()
657 */
658 93 static int decode_component(DiracContext *s, int comp)
659 {
660 93 AVCodecContext *avctx = s->avctx;
661 SubBand *bands[3*MAX_DWT_LEVELS+1];
662 enum dirac_subband orientation;
663 93 int level, num_bands = 0;
664 int ret[3*MAX_DWT_LEVELS+1];
665 int i;
666 93 int damaged_count = 0;
667
668 /* Unpack all subbands at all levels. */
669
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372 for (level = 0; level < s->wavelet_depth; level++) {
670
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1209 for (orientation = !!level; orientation < 4; orientation++) {
671 930 SubBand *b = &s->plane[comp].band[level][orientation];
672 930 bands[num_bands++] = b;
673
674 930 align_get_bits(&s->gb);
675 /* [DIRAC_STD] 13.4.2 subband() */
676 930 b->length = get_interleaved_ue_golomb(&s->gb);
677
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930 if (b->length) {
678 667 b->quant = get_interleaved_ue_golomb(&s->gb);
679
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667 if (b->quant > (DIRAC_MAX_QUANT_INDEX - 1)) {
680 av_log(s->avctx, AV_LOG_ERROR, "Unsupported quant %d\n", b->quant);
681 b->quant = 0;
682 return AVERROR_INVALIDDATA;
683 }
684 667 align_get_bits(&s->gb);
685 667 b->coeff_data = s->gb.buffer + get_bits_count(&s->gb)/8;
686
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667 if (b->length > FFMAX(get_bits_left(&s->gb)/8, 0)) {
687 b->length = FFMAX(get_bits_left(&s->gb)/8, 0);
688 damaged_count ++;
689 }
690 667 skip_bits_long(&s->gb, b->length*8);
691 }
692 }
693 /* arithmetic coding has inter-level dependencies, so we can only execute one level at a time */
694
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279 if (s->is_arith)
695
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279 avctx->execute(avctx, decode_subband_arith, &s->plane[comp].band[level][!!level],
696
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279 ret + 3*level + !!level, 4-!!level, sizeof(SubBand));
697 }
698 /* golomb coding has no inter-level dependencies, so we can execute all subbands in parallel */
699
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93 if (!s->is_arith)
700 avctx->execute(avctx, decode_subband_golomb, bands, ret, num_bands, sizeof(SubBand*));
701
702
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1023 for (i = 0; i < s->wavelet_depth * 3 + 1; i++) {
703
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930 if (ret[i] < 0)
704 damaged_count++;
705 }
706
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93 if (damaged_count > (s->wavelet_depth * 3 + 1) /2)
707 return AVERROR_INVALIDDATA;
708
709 93 return 0;
710 }
711
712 #define PARSE_VALUES(type, x, gb, ebits, buf1, buf2) \
713 type *buf = (type *)buf1; \
714 buf[x] = coeff_unpack_golomb(gb, qfactor, qoffset); \
715 if (get_bits_count(gb) >= ebits) \
716 return; \
717 if (buf2) { \
718 buf = (type *)buf2; \
719 buf[x] = coeff_unpack_golomb(gb, qfactor, qoffset); \
720 if (get_bits_count(gb) >= ebits) \
721 return; \
722 } \
723
724 186000 static void decode_subband(DiracContext *s, GetBitContext *gb, int quant,
725 int slice_x, int slice_y, int bits_end,
726 SubBand *b1, SubBand *b2)
727 {
728 186000 int left = b1->width * slice_x / s->num_x;
729 186000 int right = b1->width *(slice_x+1) / s->num_x;
730 186000 int top = b1->height * slice_y / s->num_y;
731 186000 int bottom = b1->height *(slice_y+1) / s->num_y;
732
733 int qfactor, qoffset;
734
735 186000 uint8_t *buf1 = b1->ibuf + top * b1->stride;
736
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186000 uint8_t *buf2 = b2 ? b2->ibuf + top * b2->stride: NULL;
737 int x, y;
738
739
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186000 if (quant > (DIRAC_MAX_QUANT_INDEX - 1)) {
740 av_log(s->avctx, AV_LOG_ERROR, "Unsupported quant %d\n", quant);
741 return;
742 }
743 186000 qfactor = ff_dirac_qscale_tab[quant];
744 186000 qoffset = ff_dirac_qoffset_intra_tab[quant] + 2;
745 /* we have to constantly check for overread since the spec explicitly
746 requires this, with the meaning that all remaining coeffs are set to 0 */
747
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186000 if (get_bits_count(gb) >= bits_end)
748 38746 return;
749
750
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147254 if (s->pshift) {
751 for (y = top; y < bottom; y++) {
752 for (x = left; x < right; x++) {
753 PARSE_VALUES(int32_t, x, gb, bits_end, buf1, buf2);
754 }
755 buf1 += b1->stride;
756 if (buf2)
757 buf2 += b2->stride;
758 }
759 }
760 else {
761
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518899 for (y = top; y < bottom; y++) {
762
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1836007 for (x = left; x < right; x++) {
763
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1464362 PARSE_VALUES(int16_t, x, gb, bits_end, buf1, buf2);
764 }
765 371645 buf1 += b1->stride;
766
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371645 if (buf2)
767 173605 buf2 += b2->stride;
768 }
769 }
770 }
771
772 /**
773 * Dirac Specification ->
774 * 13.5.2 Slices. slice(sx,sy)
775 */
776 9300 static int decode_lowdelay_slice(AVCodecContext *avctx, void *arg)
777 {
778 9300 DiracContext *s = avctx->priv_data;
779 9300 DiracSlice *slice = arg;
780 9300 GetBitContext *gb = &slice->gb;
781 enum dirac_subband orientation;
782 int level, quant, chroma_bits, chroma_end;
783
784 9300 int quant_base = get_bits(gb, 7); /*[DIRAC_STD] qindex */
785 9300 int length_bits = av_log2(8 * slice->bytes)+1;
786 9300 int luma_bits = get_bits_long(gb, length_bits);
787
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9300 int luma_end = get_bits_count(gb) + FFMIN(luma_bits, get_bits_left(gb));
788
789 /* [DIRAC_STD] 13.5.5.2 luma_slice_band */
790
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37200 for (level = 0; level < s->wavelet_depth; level++)
791
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120900 for (orientation = !!level; orientation < 4; orientation++) {
792 93000 quant = FFMAX(quant_base - s->lowdelay.quant[level][orientation], 0);
793 93000 decode_subband(s, gb, quant, slice->slice_x, slice->slice_y, luma_end,
794 &s->plane[0].band[level][orientation], NULL);
795 }
796
797 /* consume any unused bits from luma */
798 9300 skip_bits_long(gb, get_bits_count(gb) - luma_end);
799
800 9300 chroma_bits = 8*slice->bytes - 7 - length_bits - luma_bits;
801
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9300 chroma_end = get_bits_count(gb) + FFMIN(chroma_bits, get_bits_left(gb));
802 /* [DIRAC_STD] 13.5.5.3 chroma_slice_band */
803
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37200 for (level = 0; level < s->wavelet_depth; level++)
804
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120900 for (orientation = !!level; orientation < 4; orientation++) {
805 93000 quant = FFMAX(quant_base - s->lowdelay.quant[level][orientation], 0);
806 93000 decode_subband(s, gb, quant, slice->slice_x, slice->slice_y, chroma_end,
807 &s->plane[1].band[level][orientation],
808 &s->plane[2].band[level][orientation]);
809 }
810
811 9300 return 0;
812 }
813
814 typedef struct SliceCoeffs {
815 int left;
816 int top;
817 int tot_h;
818 int tot_v;
819 int tot;
820 } SliceCoeffs;
821
822 117841 static int subband_coeffs(DiracContext *s, int x, int y, int p,
823 SliceCoeffs c[MAX_DWT_LEVELS])
824 {
825 117841 int level, coef = 0;
826
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589174 for (level = 0; level < s->wavelet_depth; level++) {
827 471333 SliceCoeffs *o = &c[level];
828 471333 SubBand *b = &s->plane[p].band[level][3]; /* orientation doens't matter */
829 471333 o->top = b->height * y / s->num_y;
830 471333 o->left = b->width * x / s->num_x;
831 471333 o->tot_h = ((b->width * (x + 1)) / s->num_x) - o->left;
832 471333 o->tot_v = ((b->height * (y + 1)) / s->num_y) - o->top;
833 471333 o->tot = o->tot_h*o->tot_v;
834
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471333 coef += o->tot * (4 - !!level);
835 }
836 117841 return coef;
837 }
838
839 /**
840 * VC-2 Specification ->
841 * 13.5.3 hq_slice(sx,sy)
842 */
843 39204 static int decode_hq_slice(DiracContext *s, DiracSlice *slice, uint8_t *tmp_buf)
844 {
845 int i, level, orientation, quant_idx;
846 int qfactor[MAX_DWT_LEVELS][4], qoffset[MAX_DWT_LEVELS][4];
847 39204 GetBitContext *gb = &slice->gb;
848 SliceCoeffs coeffs_num[MAX_DWT_LEVELS];
849
850 39204 skip_bits_long(gb, 8*s->highquality.prefix_bytes);
851 39204 quant_idx = get_bits(gb, 8);
852
853
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39204 if (quant_idx > DIRAC_MAX_QUANT_INDEX - 1) {
854 av_log(s->avctx, AV_LOG_ERROR, "Invalid quantization index - %i\n", quant_idx);
855 return AVERROR_INVALIDDATA;
856 }
857
858 /* Slice quantization (slice_quantizers() in the specs) */
859
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196020 for (level = 0; level < s->wavelet_depth; level++) {
860
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666468 for (orientation = !!level; orientation < 4; orientation++) {
861 509652 const int quant = FFMAX(quant_idx - s->lowdelay.quant[level][orientation], 0);
862 509652 qfactor[level][orientation] = ff_dirac_qscale_tab[quant];
863 509652 qoffset[level][orientation] = ff_dirac_qoffset_intra_tab[quant] + 2;
864 }
865 }
866
867 /* Luma + 2 Chroma planes */
868
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156816 for (i = 0; i < 3; i++) {
869 117612 int coef_num, coef_par, off = 0;
870 117612 int64_t length = s->highquality.size_scaler*get_bits(gb, 8);
871 117612 int64_t bits_end = get_bits_count(gb) + 8*length;
872 117612 const uint8_t *addr = align_get_bits(gb);
873
874
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117612 if (length*8 > get_bits_left(gb)) {
875 av_log(s->avctx, AV_LOG_ERROR, "end too far away\n");
876 return AVERROR_INVALIDDATA;
877 }
878
879 117612 coef_num = subband_coeffs(s, slice->slice_x, slice->slice_y, i, coeffs_num);
880
881
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117612 if (s->pshift)
882 85536 coef_par = ff_dirac_golomb_read_32bit(addr, length,
883 tmp_buf, coef_num);
884 else
885 32076 coef_par = ff_dirac_golomb_read_16bit(addr, length,
886 tmp_buf, coef_num);
887
888
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117612 if (coef_num > coef_par) {
889 const int start_b = coef_par * (1 << (s->pshift + 1));
890 const int end_b = coef_num * (1 << (s->pshift + 1));
891 memset(&tmp_buf[start_b], 0, end_b - start_b);
892 }
893
894
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588060 for (level = 0; level < s->wavelet_depth; level++) {
895 470448 const SliceCoeffs *c = &coeffs_num[level];
896
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1999404 for (orientation = !!level; orientation < 4; orientation++) {
897 1528956 const SubBand *b1 = &s->plane[i].band[level][orientation];
898 1528956 uint8_t *buf = b1->ibuf + c->top * b1->stride + (c->left << (s->pshift + 1));
899
900 /* Change to c->tot_h <= 4 for AVX2 dequantization */
901
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1528956 const int qfunc = s->pshift + 2*(c->tot_h <= 2);
902 1528956 s->diracdsp.dequant_subband[qfunc](&tmp_buf[off], buf, b1->stride,
903 qfactor[level][orientation],
904 qoffset[level][orientation],
905 1528956 c->tot_v, c->tot_h);
906
907 1528956 off += c->tot << (s->pshift + 1);
908 }
909 }
910
911 117612 skip_bits_long(gb, bits_end - get_bits_count(gb));
912 }
913
914 39204 return 0;
915 }
916
917 3564 static int decode_hq_slice_row(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
918 {
919 int i;
920 3564 DiracContext *s = avctx->priv_data;
921 3564 DiracSlice *slices = ((DiracSlice *)arg) + s->num_x*jobnr;
922 3564 uint8_t *thread_buf = &s->thread_buf[s->thread_buf_size*threadnr];
923
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42768 for (i = 0; i < s->num_x; i++)
924 39204 decode_hq_slice(s, &slices[i], thread_buf);
925 3564 return 0;
926 }
927
928 /**
929 * Dirac Specification ->
930 * 13.5.1 low_delay_transform_data()
931 */
932 229 static int decode_lowdelay(DiracContext *s)
933 {
934 229 AVCodecContext *avctx = s->avctx;
935 int slice_x, slice_y, bufsize;
936 229 int64_t coef_buf_size, bytes = 0;
937 const uint8_t *buf;
938 DiracSlice *slices;
939 SliceCoeffs tmp[MAX_DWT_LEVELS];
940 229 int slice_num = 0;
941
942
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229 if (s->slice_params_num_buf != (s->num_x * s->num_y)) {
943 68 s->slice_params_buf = av_realloc_f(s->slice_params_buf, s->num_x * s->num_y, sizeof(DiracSlice));
944
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68 if (!s->slice_params_buf) {
945 av_log(s->avctx, AV_LOG_ERROR, "slice params buffer allocation failure\n");
946 s->slice_params_num_buf = 0;
947 return AVERROR(ENOMEM);
948 }
949 68 s->slice_params_num_buf = s->num_x * s->num_y;
950 }
951 229 slices = s->slice_params_buf;
952
953 /* 8 becacuse that's how much the golomb reader could overread junk data
954 * from another plane/slice at most, and 512 because SIMD */
955 229 coef_buf_size = subband_coeffs(s, s->num_x - 1, s->num_y - 1, 0, tmp) + 8;
956 229 coef_buf_size = (coef_buf_size << (1 + s->pshift)) + 512;
957
958
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229 if (s->threads_num_buf != avctx->thread_count ||
959
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161 s->thread_buf_size != coef_buf_size) {
960 68 s->threads_num_buf = avctx->thread_count;
961 68 s->thread_buf_size = coef_buf_size;
962 68 s->thread_buf = av_realloc_f(s->thread_buf, avctx->thread_count, s->thread_buf_size);
963
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68 if (!s->thread_buf) {
964 av_log(s->avctx, AV_LOG_ERROR, "thread buffer allocation failure\n");
965 return AVERROR(ENOMEM);
966 }
967 }
968
969 229 align_get_bits(&s->gb);
970 /*[DIRAC_STD] 13.5.2 Slices. slice(sx,sy) */
971 229 buf = s->gb.buffer + get_bits_count(&s->gb)/8;
972 229 bufsize = get_bits_left(&s->gb);
973
974
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229 if (s->hq_picture) {
975 int i;
976
977
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3762 for (slice_y = 0; bufsize > 0 && slice_y < s->num_y; slice_y++) {
978
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42768 for (slice_x = 0; bufsize > 0 && slice_x < s->num_x; slice_x++) {
979 39204 bytes = s->highquality.prefix_bytes + 1;
980
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156816 for (i = 0; i < 3; i++) {
981
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117612 if (bytes <= bufsize/8)
982 117612 bytes += buf[bytes] * s->highquality.size_scaler + 1;
983 }
984
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39204 if (bytes >= INT_MAX || bytes*8 > bufsize) {
985 av_log(s->avctx, AV_LOG_ERROR, "too many bytes\n");
986 return AVERROR_INVALIDDATA;
987 }
988
989 39204 slices[slice_num].bytes = bytes;
990 39204 slices[slice_num].slice_x = slice_x;
991 39204 slices[slice_num].slice_y = slice_y;
992 39204 init_get_bits(&slices[slice_num].gb, buf, bufsize);
993 39204 slice_num++;
994
995 39204 buf += bytes;
996
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39204 if (bufsize/8 >= bytes)
997 39204 bufsize -= bytes*8;
998 else
999 bufsize = 0;
1000 }
1001 }
1002
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198 if (s->num_x*s->num_y != slice_num) {
1004 av_log(s->avctx, AV_LOG_ERROR, "too few slices\n");
1005 return AVERROR_INVALIDDATA;
1006 }
1007
1008 198 avctx->execute2(avctx, decode_hq_slice_row, slices, NULL, s->num_y);
1009 } else {
1010
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496 for (slice_y = 0; bufsize > 0 && slice_y < s->num_y; slice_y++) {
1011
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9765 for (slice_x = 0; bufsize > 0 && slice_x < s->num_x; slice_x++) {
1012 9300 bytes = (slice_num+1) * (int64_t)s->lowdelay.bytes.num / s->lowdelay.bytes.den
1013 9300 - slice_num * (int64_t)s->lowdelay.bytes.num / s->lowdelay.bytes.den;
1014
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9300 if (bytes >= INT_MAX || bytes*8 > bufsize) {
1015 av_log(s->avctx, AV_LOG_ERROR, "too many bytes\n");
1016 return AVERROR_INVALIDDATA;
1017 }
1018 9300 slices[slice_num].bytes = bytes;
1019 9300 slices[slice_num].slice_x = slice_x;
1020 9300 slices[slice_num].slice_y = slice_y;
1021 9300 init_get_bits(&slices[slice_num].gb, buf, bufsize);
1022 9300 slice_num++;
1023
1024 9300 buf += bytes;
1025
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9300 if (bufsize/8 >= bytes)
1026 9300 bufsize -= bytes*8;
1027 else
1028 bufsize = 0;
1029 }
1030 }
1031 31 avctx->execute(avctx, decode_lowdelay_slice, slices, NULL, slice_num,
1032 sizeof(DiracSlice)); /* [DIRAC_STD] 13.5.2 Slices */
1033 }
1034
1035
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229 if (s->dc_prediction) {
1036
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31 if (s->pshift) {
1037 intra_dc_prediction_10(&s->plane[0].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */
1038 intra_dc_prediction_10(&s->plane[1].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */
1039 intra_dc_prediction_10(&s->plane[2].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */
1040 } else {
1041 31 intra_dc_prediction_8(&s->plane[0].band[0][0]);
1042 31 intra_dc_prediction_8(&s->plane[1].band[0][0]);
1043 31 intra_dc_prediction_8(&s->plane[2].band[0][0]);
1044 }
1045 }
1046
1047 229 return 0;
1048 }
1049
1050 260 static void init_planes(DiracContext *s)
1051 {
1052 int i, w, h, level, orientation;
1053
1054
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1040 for (i = 0; i < 3; i++) {
1055 780 Plane *p = &s->plane[i];
1056
1057
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780 p->width = s->seq.width >> (i ? s->chroma_x_shift : 0);
1058
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780 p->height = s->seq.height >> (i ? s->chroma_y_shift : 0);
1059 780 p->idwt.width = w = CALC_PADDING(p->width , s->wavelet_depth);
1060 780 p->idwt.height = h = CALC_PADDING(p->height, s->wavelet_depth);
1061 780 p->idwt.stride = FFALIGN(p->idwt.width, 8) << (1 + s->pshift);
1062
1063
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3714 for (level = s->wavelet_depth-1; level >= 0; level--) {
1064 2934 w = w>>1;
1065 2934 h = h>>1;
1066
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12516 for (orientation = !!level; orientation < 4; orientation++) {
1067 9582 SubBand *b = &p->band[level][orientation];
1068
1069 9582 b->pshift = s->pshift;
1070 9582 b->ibuf = p->idwt.buf;
1071 9582 b->level = level;
1072 9582 b->stride = p->idwt.stride << (s->wavelet_depth - level);
1073 9582 b->width = w;
1074 9582 b->height = h;
1075 9582 b->orientation = orientation;
1076
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9582 if (orientation & 1)
1078 5868 b->ibuf += w << (1+b->pshift);
1079
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9582 if (orientation > 1)
1080 5868 b->ibuf += (b->stride>>1);
1081
1082
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9582 if (level)
1083 6462 b->parent = &p->band[level-1][orientation];
1084 }
1085 }
1086
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780 if (i > 0) {
1088 520 p->xblen = s->plane[0].xblen >> s->chroma_x_shift;
1089 520 p->yblen = s->plane[0].yblen >> s->chroma_y_shift;
1090 520 p->xbsep = s->plane[0].xbsep >> s->chroma_x_shift;
1091 520 p->ybsep = s->plane[0].ybsep >> s->chroma_y_shift;
1092 }
1093
1094 780 p->xoffset = (p->xblen - p->xbsep)/2;
1095 780 p->yoffset = (p->yblen - p->ybsep)/2;
1096 }
1097 260 }
1098
1099 /**
1100 * Unpack the motion compensation parameters
1101 * Dirac Specification ->
1102 * 11.2 Picture prediction data. picture_prediction()
1103 */
1104 29 static int dirac_unpack_prediction_parameters(DiracContext *s)
1105 {
1106 static const uint8_t default_blen[] = { 4, 12, 16, 24 };
1107
1108 29 GetBitContext *gb = &s->gb;
1109 unsigned idx, ref;
1110
1111 29 align_get_bits(gb);
1112 /* [DIRAC_STD] 11.2.2 Block parameters. block_parameters() */
1113 /* Luma and Chroma are equal. 11.2.3 */
1114 29 idx = get_interleaved_ue_golomb(gb); /* [DIRAC_STD] index */
1115
1116
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29 if (idx > 4) {
1117 av_log(s->avctx, AV_LOG_ERROR, "Block prediction index too high\n");
1118 return AVERROR_INVALIDDATA;
1119 }
1120
1121
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29 if (idx == 0) {
1122 29 s->plane[0].xblen = get_interleaved_ue_golomb(gb);
1123 29 s->plane[0].yblen = get_interleaved_ue_golomb(gb);
1124 29 s->plane[0].xbsep = get_interleaved_ue_golomb(gb);
1125 29 s->plane[0].ybsep = get_interleaved_ue_golomb(gb);
1126 } else {
1127 /*[DIRAC_STD] preset_block_params(index). Table 11.1 */
1128 s->plane[0].xblen = default_blen[idx-1];
1129 s->plane[0].yblen = default_blen[idx-1];
1130 s->plane[0].xbsep = 4 * idx;
1131 s->plane[0].ybsep = 4 * idx;
1132 }
1133 /*[DIRAC_STD] 11.2.4 motion_data_dimensions()
1134 Calculated in function dirac_unpack_block_motion_data */
1135
1136
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29 if (s->plane[0].xblen % (1 << s->chroma_x_shift) != 0 ||
1137
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29 s->plane[0].yblen % (1 << s->chroma_y_shift) != 0 ||
1138
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29 !s->plane[0].xblen || !s->plane[0].yblen) {
1139 av_log(s->avctx, AV_LOG_ERROR,
1140 "invalid x/y block length (%d/%d) for x/y chroma shift (%d/%d)\n",
1141 s->plane[0].xblen, s->plane[0].yblen, s->chroma_x_shift, s->chroma_y_shift);
1142 return AVERROR_INVALIDDATA;
1143 }
1144
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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) {
1145 av_log(s->avctx, AV_LOG_ERROR, "Block separation too small\n");
1146 return AVERROR_INVALIDDATA;
1147 }
1148
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29 if (s->plane[0].xbsep > s->plane[0].xblen || s->plane[0].ybsep > s->plane[0].yblen) {
1149 av_log(s->avctx, AV_LOG_ERROR, "Block separation greater than size\n");
1150 return AVERROR_INVALIDDATA;
1151 }
1152
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29 if (FFMAX(s->plane[0].xblen, s->plane[0].yblen) > MAX_BLOCKSIZE) {
1153 av_log(s->avctx, AV_LOG_ERROR, "Unsupported large block size\n");
1154 return AVERROR_PATCHWELCOME;
1155 }
1156
1157 /*[DIRAC_STD] 11.2.5 Motion vector precision. motion_vector_precision()
1158 Read motion vector precision */
1159 29 s->mv_precision = get_interleaved_ue_golomb(gb);
1160
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29 if (s->mv_precision > 3) {
1161 av_log(s->avctx, AV_LOG_ERROR, "MV precision finer than eighth-pel\n");
1162 return AVERROR_INVALIDDATA;
1163 }
1164
1165 /*[DIRAC_STD] 11.2.6 Global motion. global_motion()
1166 Read the global motion compensation parameters */
1167 29 s->globalmc_flag = get_bits1(gb);
1168
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29 if (s->globalmc_flag) {
1169 memset(s->globalmc, 0, sizeof(s->globalmc));
1170 /* [DIRAC_STD] pan_tilt(gparams) */
1171 for (ref = 0; ref < s->num_refs; ref++) {
1172 if (get_bits1(gb)) {
1173 s->globalmc[ref].pan_tilt[0] = dirac_get_se_golomb(gb);
1174 s->globalmc[ref].pan_tilt[1] = dirac_get_se_golomb(gb);
1175 }
1176 /* [DIRAC_STD] zoom_rotate_shear(gparams)
1177 zoom/rotation/shear parameters */
1178 if (get_bits1(gb)) {
1179 s->globalmc[ref].zrs_exp = get_interleaved_ue_golomb(gb);
1180 s->globalmc[ref].zrs[0][0] = dirac_get_se_golomb(gb);
1181 s->globalmc[ref].zrs[0][1] = dirac_get_se_golomb(gb);
1182 s->globalmc[ref].zrs[1][0] = dirac_get_se_golomb(gb);
1183 s->globalmc[ref].zrs[1][1] = dirac_get_se_golomb(gb);
1184 } else {
1185 s->globalmc[ref].zrs[0][0] = 1;
1186 s->globalmc[ref].zrs[1][1] = 1;
1187 }
1188 /* [DIRAC_STD] perspective(gparams) */
1189 if (get_bits1(gb)) {
1190 s->globalmc[ref].perspective_exp = get_interleaved_ue_golomb(gb);
1191 s->globalmc[ref].perspective[0] = dirac_get_se_golomb(gb);
1192 s->globalmc[ref].perspective[1] = dirac_get_se_golomb(gb);
1193 }
1194 if (s->globalmc[ref].perspective_exp + (uint64_t)s->globalmc[ref].zrs_exp > 30) {
1195 return AVERROR_INVALIDDATA;
1196 }
1197
1198 }
1199 }
1200
1201 /*[DIRAC_STD] 11.2.7 Picture prediction mode. prediction_mode()
1202 Picture prediction mode, not currently used. */
1203
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29 if (get_interleaved_ue_golomb(gb)) {
1204 av_log(s->avctx, AV_LOG_ERROR, "Unknown picture prediction mode\n");
1205 return AVERROR_INVALIDDATA;
1206 }
1207
1208 /* [DIRAC_STD] 11.2.8 Reference picture weight. reference_picture_weights()
1209 just data read, weight calculation will be done later on. */
1210 29 s->weight_log2denom = 1;
1211 29 s->weight[0] = 1;
1212 29 s->weight[1] = 1;
1213
1214
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29 if (get_bits1(gb)) {
1215 s->weight_log2denom = get_interleaved_ue_golomb(gb);
1216 if (s->weight_log2denom < 1 || s->weight_log2denom > 8) {
1217 av_log(s->avctx, AV_LOG_ERROR, "weight_log2denom unsupported or invalid\n");
1218 s->weight_log2denom = 1;
1219 return AVERROR_INVALIDDATA;
1220 }
1221 s->weight[0] = dirac_get_se_golomb(gb);
1222 if (s->num_refs == 2)
1223 s->weight[1] = dirac_get_se_golomb(gb);
1224 }
1225 29 return 0;
1226 }
1227
1228 /**
1229 * Dirac Specification ->
1230 * 11.3 Wavelet transform data. wavelet_transform()
1231 */
1232 260 static int dirac_unpack_idwt_params(DiracContext *s)
1233 {
1234 260 GetBitContext *gb = &s->gb;
1235 int i, level;
1236 unsigned tmp;
1237
1238 #define CHECKEDREAD(dst, cond, errmsg) \
1239 tmp = get_interleaved_ue_golomb(gb); \
1240 if (cond) { \
1241 av_log(s->avctx, AV_LOG_ERROR, errmsg); \
1242 return AVERROR_INVALIDDATA; \
1243 }\
1244 dst = tmp;
1245
1246 260 align_get_bits(gb);
1247
1248
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260 s->zero_res = s->num_refs ? get_bits1(gb) : 0;
1249
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260 if (s->zero_res)
1250 return 0;
1251
1252 /*[DIRAC_STD] 11.3.1 Transform parameters. transform_parameters() */
1253
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260 CHECKEDREAD(s->wavelet_idx, tmp > 6, "wavelet_idx is too big\n")
1254
1255
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260 CHECKEDREAD(s->wavelet_depth, tmp > MAX_DWT_LEVELS || tmp < 1, "invalid number of DWT decompositions\n")
1256
1257
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260 if (!s->low_delay) {
1258 /* Codeblock parameters (core syntax only) */
1259
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31 if (get_bits1(gb)) {
1260
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155 for (i = 0; i <= s->wavelet_depth; i++) {
1261
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124 CHECKEDREAD(s->codeblock[i].width , tmp < 1 || tmp > (s->avctx->width >>s->wavelet_depth-i), "codeblock width invalid\n")
1262
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124 CHECKEDREAD(s->codeblock[i].height, tmp < 1 || tmp > (s->avctx->height>>s->wavelet_depth-i), "codeblock height invalid\n")
1263 }
1264
1265
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31 CHECKEDREAD(s->codeblock_mode, tmp > 1, "unknown codeblock mode\n")
1266 }
1267 else {
1268 for (i = 0; i <= s->wavelet_depth; i++)
1269 s->codeblock[i].width = s->codeblock[i].height = 1;
1270 }
1271 }
1272 else {
1273 229 s->num_x = get_interleaved_ue_golomb(gb);
1274 229 s->num_y = get_interleaved_ue_golomb(gb);
1275
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229 if (s->num_x * s->num_y == 0 || s->num_x * (uint64_t)s->num_y > INT_MAX ||
1276
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229 s->num_x * (uint64_t)s->avctx->width > INT_MAX ||
1277
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229 s->num_y * (uint64_t)s->avctx->height > INT_MAX ||
1278
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229 s->num_x > s->avctx->width ||
1279
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229 s->num_y > s->avctx->height
1280 ) {
1281 av_log(s->avctx,AV_LOG_ERROR,"Invalid numx/y\n");
1282 s->num_x = s->num_y = 0;
1283 return AVERROR_INVALIDDATA;
1284 }
1285
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229 if (s->ld_picture) {
1286 31 s->lowdelay.bytes.num = get_interleaved_ue_golomb(gb);
1287 31 s->lowdelay.bytes.den = get_interleaved_ue_golomb(gb);
1288
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31 if (s->lowdelay.bytes.den <= 0) {
1289 av_log(s->avctx,AV_LOG_ERROR,"Invalid lowdelay.bytes.den\n");
1290 return AVERROR_INVALIDDATA;
1291 }
1292
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198 } else if (s->hq_picture) {
1293 198 s->highquality.prefix_bytes = get_interleaved_ue_golomb(gb);
1294 198 s->highquality.size_scaler = get_interleaved_ue_golomb(gb);
1295
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198 if (s->highquality.prefix_bytes >= INT_MAX / 8) {
1296 av_log(s->avctx,AV_LOG_ERROR,"too many prefix bytes\n");
1297 return AVERROR_INVALIDDATA;
1298 }
1299 }
1300
1301 /* [DIRAC_STD] 11.3.5 Quantisation matrices (low-delay syntax). quant_matrix() */
1302
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229 if (get_bits1(gb)) {
1303 av_log(s->avctx,AV_LOG_DEBUG,"Low Delay: Has Custom Quantization Matrix!\n");
1304 /* custom quantization matrix */
1305 for (level = 0; level < s->wavelet_depth; level++) {
1306 for (i = !!level; i < 4; i++) {
1307 s->lowdelay.quant[level][i] = get_interleaved_ue_golomb(gb);
1308 }
1309 }
1310 } else {
1311
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229 if (s->wavelet_depth > 4) {
1312 av_log(s->avctx,AV_LOG_ERROR,"Mandatory custom low delay matrix missing for depth %d\n", s->wavelet_depth);
1313 return AVERROR_INVALIDDATA;
1314 }
1315 /* default quantization matrix */
1316
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1114 for (level = 0; level < s->wavelet_depth; level++)
1317
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4425 for (i = 0; i < 4; i++) {
1318 3540 s->lowdelay.quant[level][i] = ff_dirac_default_qmat[s->wavelet_idx][level][i];
1319 /* haar with no shift differs for different depths */
1320
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3540 if (s->wavelet_idx == 3)
1321 s->lowdelay.quant[level][i] += 4*(s->wavelet_depth-1 - level);
1322 }
1323 }
1324 }
1325 260 return 0;
1326 }
1327
1328 2320 static inline int pred_sbsplit(uint8_t *sbsplit, int stride, int x, int y)
1329 {
1330 static const uint8_t avgsplit[7] = { 0, 0, 1, 1, 1, 2, 2 };
1331
1332
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2320 if (!(x|y))
1333 29 return 0;
1334
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2291 else if (!y)
1335 261 return sbsplit[-1];
1336
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2030 else if (!x)
1337 203 return sbsplit[-stride];
1338
1339 1827 return avgsplit[sbsplit[-1] + sbsplit[-stride] + sbsplit[-stride-1]];
1340 }
1341
1342 8493 static inline int pred_block_mode(DiracBlock *block, int stride, int x, int y, int refmask)
1343 {
1344 int pred;
1345
1346
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8493 if (!(x|y))
1347 57 return 0;
1348
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8436 else if (!y)
1349 545 return block[-1].ref & refmask;
1350
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7891 else if (!x)
1351 399 return block[-stride].ref & refmask;
1352
1353 /* return the majority */
1354 7492 pred = (block[-1].ref & refmask) + (block[-stride].ref & refmask) + (block[-stride-1].ref & refmask);
1355 7492 return (pred >> 1) & refmask;
1356 }
1357
1358 754 static inline void pred_block_dc(DiracBlock *block, int stride, int x, int y)
1359 {
1360 754 int i, n = 0;
1361
1362 754 memset(block->u.dc, 0, sizeof(block->u.dc));
1363
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754 if (x && !(block[-1].ref & 3)) {
1365
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1752 for (i = 0; i < 3; i++)
1366 1314 block->u.dc[i] += block[-1].u.dc[i];
1367 438 n++;
1368 }
1369
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754 if (y && !(block[-stride].ref & 3)) {
1371
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1616 for (i = 0; i < 3; i++)
1372 1212 block->u.dc[i] += block[-stride].u.dc[i];
1373 404 n++;
1374 }
1375
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754 if (x && y && !(block[-1-stride].ref & 3)) {
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1372 for (i = 0; i < 3; i++)
1378 1029 block->u.dc[i] += block[-1-stride].u.dc[i];
1379 343 n++;
1380 }
1381
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754 if (n == 2) {
1383
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880 for (i = 0; i < 3; i++)
1384 660 block->u.dc[i] = (block->u.dc[i]+1)>>1;
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534 } else if (n == 3) {
1386
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656 for (i = 0; i < 3; i++)
1387 492 block->u.dc[i] = divide3(block->u.dc[i]);
1388 }
1389 754 }
1390
1391 5951 static inline void pred_mv(DiracBlock *block, int stride, int x, int y, int ref)
1392 {
1393 int16_t *pred[3];
1394 5951 int refmask = ref+1;
1395 5951 int mask = refmask | DIRAC_REF_MASK_GLOBAL; /* exclude gmc blocks */
1396 5951 int n = 0;
1397
1398
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5951 if (x && (block[-1].ref & mask) == refmask)
1399 4890 pred[n++] = block[-1].u.mv[ref];
1400
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5951 if (y && (block[-stride].ref & mask) == refmask)
1402 4719 pred[n++] = block[-stride].u.mv[ref];
1403
1404
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5951 if (x && y && (block[-stride-1].ref & mask) == refmask)
1405 4313 pred[n++] = block[-stride-1].u.mv[ref];
1406
1407
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5951 switch (n) {
1408 304 case 0:
1409 304 block->u.mv[ref][0] = 0;
1410 304 block->u.mv[ref][1] = 0;
1411 304 break;
1412 1266 case 1:
1413 1266 block->u.mv[ref][0] = pred[0][0];
1414 1266 block->u.mv[ref][1] = pred[0][1];
1415 1266 break;
1416 487 case 2:
1417 487 block->u.mv[ref][0] = (pred[0][0] + pred[1][0] + 1) >> 1;
1418 487 block->u.mv[ref][1] = (pred[0][1] + pred[1][1] + 1) >> 1;
1419 487 break;
1420 3894 case 3:
1421 3894 block->u.mv[ref][0] = mid_pred(pred[0][0], pred[1][0], pred[2][0]);
1422 3894 block->u.mv[ref][1] = mid_pred(pred[0][1], pred[1][1], pred[2][1]);
1423 3894 break;
1424 }
1425 5951 }
1426
1427 static void global_mv(DiracContext *s, DiracBlock *block, int x, int y, int ref)
1428 {
1429 int ez = s->globalmc[ref].zrs_exp;
1430 int ep = s->globalmc[ref].perspective_exp;
1431 int (*A)[2] = s->globalmc[ref].zrs;
1432 int *b = s->globalmc[ref].pan_tilt;
1433 int *c = s->globalmc[ref].perspective;
1434
1435 int64_t m = (1<<ep) - (c[0]*(int64_t)x + c[1]*(int64_t)y);
1436 int64_t mx = m * (uint64_t)((A[0][0] * (int64_t)x + A[0][1]*(int64_t)y) + (1LL<<ez) * b[0]);
1437 int64_t my = m * (uint64_t)((A[1][0] * (int64_t)x + A[1][1]*(int64_t)y) + (1LL<<ez) * b[1]);
1438
1439 block->u.mv[ref][0] = (mx + (1<<(ez+ep))) >> (ez+ep);
1440 block->u.mv[ref][1] = (my + (1<<(ez+ep))) >> (ez+ep);
1441 }
1442
1443 4348 static void decode_block_params(DiracContext *s, DiracArith arith[8], DiracBlock *block,
1444 int stride, int x, int y)
1445 {
1446 int i;
1447
1448 4348 block->ref = pred_block_mode(block, stride, x, y, DIRAC_REF_MASK_REF1);
1449 4348 block->ref ^= dirac_get_arith_bit(arith, CTX_PMODE_REF1);
1450
1451
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4348 if (s->num_refs == 2) {
1452 4145 block->ref |= pred_block_mode(block, stride, x, y, DIRAC_REF_MASK_REF2);
1453 4145 block->ref ^= dirac_get_arith_bit(arith, CTX_PMODE_REF2) << 1;
1454 }
1455
1456
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4348 if (!block->ref) {
1457 754 pred_block_dc(block, stride, x, y);
1458
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3016 for (i = 0; i < 3; i++)
1459 2262 block->u.dc[i] += (unsigned)dirac_get_arith_int(arith+1+i, CTX_DC_F1, CTX_DC_DATA);
1460 754 return;
1461 }
1462
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3594 if (s->globalmc_flag) {
1464 block->ref |= pred_block_mode(block, stride, x, y, DIRAC_REF_MASK_GLOBAL);
1465 block->ref ^= dirac_get_arith_bit(arith, CTX_GLOBAL_BLOCK) << 2;
1466 }
1467
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10636 for (i = 0; i < s->num_refs; i++)
1469
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7042 if (block->ref & (i+1)) {
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5951 if (block->ref & DIRAC_REF_MASK_GLOBAL) {
1471 global_mv(s, block, x, y, i);
1472 } else {
1473 5951 pred_mv(block, stride, x, y, i);
1474 5951 block->u.mv[i][0] += (unsigned)dirac_get_arith_int(arith + 4 + 2 * i, CTX_MV_F1, CTX_MV_DATA);
1475 5951 block->u.mv[i][1] += (unsigned)dirac_get_arith_int(arith + 5 + 2 * i, CTX_MV_F1, CTX_MV_DATA);
1476 }
1477 }
1478 }
1479
1480 /**
1481 * Copies the current block to the other blocks covered by the current superblock split mode
1482 */
1483 4348 static void propagate_block_data(DiracBlock *block, int stride, int size)
1484 {
1485 int x, y;
1486 4348 DiracBlock *dst = block;
1487
1488
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11112 for (x = 1; x < size; x++)
1489 6764 dst[x] = *block;
1490
1491
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11112 for (y = 1; y < size; y++) {
1492 6764 dst += stride;
1493
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32772 for (x = 0; x < size; x++)
1494 26008 dst[x] = *block;
1495 }
1496 4348 }
1497
1498 /**
1499 * Dirac Specification ->
1500 * 12. Block motion data syntax
1501 */
1502 29 static int dirac_unpack_block_motion_data(DiracContext *s)
1503 {
1504 29 GetBitContext *gb = &s->gb;
1505 29 uint8_t *sbsplit = s->sbsplit;
1506 int i, x, y, q, p;
1507 DiracArith arith[8];
1508
1509 29 align_get_bits(gb);
1510
1511 /* [DIRAC_STD] 11.2.4 and 12.2.1 Number of blocks and superblocks */
1512 29 s->sbwidth = DIVRNDUP(s->seq.width, 4*s->plane[0].xbsep);
1513 29 s->sbheight = DIVRNDUP(s->seq.height, 4*s->plane[0].ybsep);
1514 29 s->blwidth = 4 * s->sbwidth;
1515 29 s->blheight = 4 * s->sbheight;
1516
1517 /* [DIRAC_STD] 12.3.1 Superblock splitting modes. superblock_split_modes()
1518 decode superblock split modes */
1519 29 ff_dirac_init_arith_decoder(arith, gb, get_interleaved_ue_golomb(gb)); /* get_interleaved_ue_golomb(gb) is the length */
1520
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261 for (y = 0; y < s->sbheight; y++) {
1521
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2552 for (x = 0; x < s->sbwidth; x++) {
1522 2320 unsigned int split = dirac_get_arith_uint(arith, CTX_SB_F1, CTX_SB_DATA);
1523
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2320 if (split > 2)
1524 return AVERROR_INVALIDDATA;
1525 2320 sbsplit[x] = (split + pred_sbsplit(sbsplit+x, s->sbwidth, x, y)) % 3;
1526 }
1527 232 sbsplit += s->sbwidth;
1528 }
1529
1530 /* setup arith decoding */
1531 29 ff_dirac_init_arith_decoder(arith, gb, get_interleaved_ue_golomb(gb));
1532
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86 for (i = 0; i < s->num_refs; i++) {
1533 57 ff_dirac_init_arith_decoder(arith + 4 + 2 * i, gb, get_interleaved_ue_golomb(gb));
1534 57 ff_dirac_init_arith_decoder(arith + 5 + 2 * i, gb, get_interleaved_ue_golomb(gb));
1535 }
1536
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116 for (i = 0; i < 3; i++)
1537 87 ff_dirac_init_arith_decoder(arith+1+i, gb, get_interleaved_ue_golomb(gb));
1538
1539
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261 for (y = 0; y < s->sbheight; y++)
1540
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2552 for (x = 0; x < s->sbwidth; x++) {
1541 2320 int blkcnt = 1 << s->sbsplit[y * s->sbwidth + x];
1542 2320 int step = 4 >> s->sbsplit[y * s->sbwidth + x];
1543
1544
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5098 for (q = 0; q < blkcnt; q++)
1545
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7126 for (p = 0; p < blkcnt; p++) {
1546 4348 int bx = 4 * x + p*step;
1547 4348 int by = 4 * y + q*step;
1548 4348 DiracBlock *block = &s->blmotion[by*s->blwidth + bx];
1549 4348 decode_block_params(s, arith, block, s->blwidth, bx, by);
1550 4348 propagate_block_data(block, s->blwidth, step);
1551 }
1552 }
1553
1554
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259 for (i = 0; i < 4 + 2*s->num_refs; i++) {
1555
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230 if (arith[i].error)
1556 return arith[i].error;
1557 }
1558
1559 29 return 0;
1560 }
1561
1562 72384 static int weight(int i, int blen, int offset)
1563 {
1564 #define ROLLOFF(i) offset == 1 ? ((i) ? 5 : 3) : \
1565 (1 + (6*(i) + offset - 1) / (2*offset - 1))
1566
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72384 if (i < 2*offset)
1568
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36192 return ROLLOFF(i);
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36192 else if (i > blen-1 - 2*offset)
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36192 return ROLLOFF(blen-1 - i);
1571 return 8;
1572 }
1573
1574 8352 static void init_obmc_weight_row(Plane *p, uint8_t *obmc_weight, int stride,
1575 int left, int right, int wy)
1576 {
1577 int x;
1578
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25056 for (x = 0; left && x < p->xblen >> 1; x++)
1579 16704 obmc_weight[x] = wy*8;
1580
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75168 for (; x < p->xblen >> right; x++)
1581 66816 obmc_weight[x] = wy*weight(x, p->xblen, p->xoffset);
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25056 for (; x < p->xblen; x++)
1583 16704 obmc_weight[x] = wy*8;
1584
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175392 for (; x < stride; x++)
1585 167040 obmc_weight[x] = 0;
1586 8352 }
1587
1588 783 static void init_obmc_weight(Plane *p, uint8_t *obmc_weight, int stride,
1589 int left, int right, int top, int bottom)
1590 {
1591 int y;
1592
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2175 for (y = 0; top && y < p->yblen >> 1; y++) {
1593 1392 init_obmc_weight_row(p, obmc_weight, stride, left, right, 8);
1594 1392 obmc_weight += stride;
1595 }
1596
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6351 for (; y < p->yblen >> bottom; y++) {
1597 5568 int wy = weight(y, p->yblen, p->yoffset);
1598 5568 init_obmc_weight_row(p, obmc_weight, stride, left, right, wy);
1599 5568 obmc_weight += stride;
1600 }
1601
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2175 for (; y < p->yblen; y++) {
1602 1392 init_obmc_weight_row(p, obmc_weight, stride, left, right, 8);
1603 1392 obmc_weight += stride;
1604 }
1605 783 }
1606
1607 2784 static void init_obmc_weights(DiracContext *s, Plane *p, int by)
1608 {
1609 2784 int top = !by;
1610 2784 int bottom = by == s->blheight-1;
1611
1612 /* don't bother re-initing for rows 2 to blheight-2, the weights don't change */
1613
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2784 if (top || bottom || by == 1) {
1614 261 init_obmc_weight(p, s->obmc_weight[0], MAX_BLOCKSIZE, 1, 0, top, bottom);
1615 261 init_obmc_weight(p, s->obmc_weight[1], MAX_BLOCKSIZE, 0, 0, top, bottom);
1616 261 init_obmc_weight(p, s->obmc_weight[2], MAX_BLOCKSIZE, 0, 1, top, bottom);
1617 }
1618 2784 }
1619
1620 static const uint8_t epel_weights[4][4][4] = {
1621 {{ 16, 0, 0, 0 },
1622 { 12, 4, 0, 0 },
1623 { 8, 8, 0, 0 },
1624 { 4, 12, 0, 0 }},
1625 {{ 12, 0, 4, 0 },
1626 { 9, 3, 3, 1 },
1627 { 6, 6, 2, 2 },
1628 { 3, 9, 1, 3 }},
1629 {{ 8, 0, 8, 0 },
1630 { 6, 2, 6, 2 },
1631 { 4, 4, 4, 4 },
1632 { 2, 6, 2, 6 }},
1633 {{ 4, 0, 12, 0 },
1634 { 3, 1, 9, 3 },
1635 { 2, 2, 6, 6 },
1636 { 1, 3, 3, 9 }}
1637 };
1638
1639 /**
1640 * For block x,y, determine which of the hpel planes to do bilinear
1641 * interpolation from and set src[] to the location in each hpel plane
1642 * to MC from.
1643 *
1644 * @return the index of the put_dirac_pixels_tab function to use
1645 * 0 for 1 plane (fpel,hpel), 1 for 2 planes (qpel), 2 for 4 planes (qpel), and 3 for epel
1646 */
1647 199452 static int mc_subpel(DiracContext *s, DiracBlock *block, const uint8_t *src[5],
1648 int x, int y, int ref, int plane)
1649 {
1650 199452 Plane *p = &s->plane[plane];
1651 199452 uint8_t **ref_hpel = s->ref_pics[ref]->hpel[plane];
1652 199452 int motion_x = block->u.mv[ref][0];
1653 199452 int motion_y = block->u.mv[ref][1];
1654 199452 int mx, my, i, epel, nplanes = 0;
1655
1656
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199452 if (plane) {
1657 132968 motion_x >>= s->chroma_x_shift;
1658 132968 motion_y >>= s->chroma_y_shift;
1659 }
1660
1661 199452 mx = motion_x & ~(-1U << s->mv_precision);
1662 199452 my = motion_y & ~(-1U << s->mv_precision);
1663 199452 motion_x >>= s->mv_precision;
1664 199452 motion_y >>= s->mv_precision;
1665 /* normalize subpel coordinates to epel */
1666 /* TODO: template this function? */
1667 199452 mx <<= 3 - s->mv_precision;
1668 199452 my <<= 3 - s->mv_precision;
1669
1670 199452 x += motion_x;
1671 199452 y += motion_y;
1672 199452 epel = (mx|my)&1;
1673
1674 /* hpel position */
1675
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199452 if (!((mx|my)&3)) {
1676 199452 nplanes = 1;
1677 199452 src[0] = ref_hpel[(my>>1)+(mx>>2)] + y*p->stride + x;
1678 } else {
1679 /* qpel or epel */
1680 nplanes = 4;
1681 for (i = 0; i < 4; i++)
1682 src[i] = ref_hpel[i] + y*p->stride + x;
1683
1684 /* if we're interpolating in the right/bottom halves, adjust the planes as needed
1685 we increment x/y because the edge changes for half of the pixels */
1686 if (mx > 4) {
1687 src[0] += 1;
1688 src[2] += 1;
1689 x++;
1690 }
1691 if (my > 4) {
1692 src[0] += p->stride;
1693 src[1] += p->stride;
1694 y++;
1695 }
1696
1697 /* hpel planes are:
1698 [0]: F [1]: H
1699 [2]: V [3]: C */
1700 if (!epel) {
1701 /* check if we really only need 2 planes since either mx or my is
1702 a hpel position. (epel weights of 0 handle this there) */
1703 if (!(mx&3)) {
1704 /* mx == 0: average [0] and [2]
1705 mx == 4: average [1] and [3] */
1706 src[!mx] = src[2 + !!mx];
1707 nplanes = 2;
1708 } else if (!(my&3)) {
1709 src[0] = src[(my>>1) ];
1710 src[1] = src[(my>>1)+1];
1711 nplanes = 2;
1712 }
1713 } else {
1714 /* adjust the ordering if needed so the weights work */
1715 if (mx > 4) {
1716 FFSWAP(const uint8_t *, src[0], src[1]);
1717 FFSWAP(const uint8_t *, src[2], src[3]);
1718 }
1719 if (my > 4) {
1720 FFSWAP(const uint8_t *, src[0], src[2]);
1721 FFSWAP(const uint8_t *, src[1], src[3]);
1722 }
1723 src[4] = epel_weights[my&3][mx&3];
1724 }
1725 }
1726
1727 /* fixme: v/h _edge_pos */
1728
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199452 if (x + p->xblen > p->width +EDGE_WIDTH/2 ||
1729
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199293 y + p->yblen > p->height+EDGE_WIDTH/2 ||
1730
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191702 x < 0 || y < 0) {
1731
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27830 for (i = 0; i < nplanes; i++) {
1732 13915 s->vdsp.emulated_edge_mc(s->edge_emu_buffer[i], src[i],
1733 p->stride, p->stride,
1734 13915 p->xblen, p->yblen, x, y,
1735 13915 p->width+EDGE_WIDTH/2, p->height+EDGE_WIDTH/2);
1736 13915 src[i] = s->edge_emu_buffer[i];
1737 }
1738 }
1739 199452 return (nplanes>>1) + epel;
1740 }
1741
1742 2262 static void add_dc(uint16_t *dst, int dc, int stride,
1743 uint8_t *obmc_weight, int xblen, int yblen)
1744 {
1745 int x, y;
1746 2262 dc += 128;
1747
1748
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26390 for (y = 0; y < yblen; y++) {
1749
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168896 for (x = 0; x < xblen; x += 2) {
1750 144768 dst[x ] += dc * obmc_weight[x ];
1751 144768 dst[x+1] += dc * obmc_weight[x+1];
1752 }
1753 24128 dst += stride;
1754 24128 obmc_weight += MAX_BLOCKSIZE;
1755 }
1756 2262 }
1757
1758 107880 static void block_mc(DiracContext *s, DiracBlock *block,
1759 uint16_t *mctmp, uint8_t *obmc_weight,
1760 int plane, int dstx, int dsty)
1761 {
1762 107880 Plane *p = &s->plane[plane];
1763 const uint8_t *src[5];
1764 int idx;
1765
1766
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107880 switch (block->ref&3) {
1767 2262 case 0: /* DC */
1768 2262 add_dc(mctmp, block->u.dc[plane], p->stride, obmc_weight, p->xblen, p->yblen);
1769 2262 return;
1770 11784 case 1:
1771 case 2:
1772 11784 idx = mc_subpel(s, block, src, dstx, dsty, (block->ref&3)-1, plane);
1773 11784 s->put_pixels_tab[idx](s->mcscratch, src, p->stride, p->yblen);
1774
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11784 if (s->weight_func)
1775 s->weight_func(s->mcscratch, p->stride, s->weight_log2denom,
1776 s->weight[0] + s->weight[1], p->yblen);
1777 11784 break;
1778 93834 case 3:
1779 93834 idx = mc_subpel(s, block, src, dstx, dsty, 0, plane);
1780 93834 s->put_pixels_tab[idx](s->mcscratch, src, p->stride, p->yblen);
1781 93834 idx = mc_subpel(s, block, src, dstx, dsty, 1, plane);
1782
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93834 if (s->biweight_func) {
1783 /* fixme: +32 is a quick hack */
1784 s->put_pixels_tab[idx](s->mcscratch + 32, src, p->stride, p->yblen);
1785 s->biweight_func(s->mcscratch, s->mcscratch+32, p->stride, s->weight_log2denom,
1786 s->weight[0], s->weight[1], p->yblen);
1787 } else
1788 93834 s->avg_pixels_tab[idx](s->mcscratch, src, p->stride, p->yblen);
1789 93834 break;
1790 }
1791 105618 s->add_obmc(mctmp, s->mcscratch, p->stride, obmc_weight, p->yblen);
1792 }
1793
1794 2697 static void mc_row(DiracContext *s, DiracBlock *block, uint16_t *mctmp, int plane, int dsty)
1795 {
1796 2697 Plane *p = &s->plane[plane];
1797 2697 int x, dstx = p->xbsep - p->xoffset;
1798
1799 2697 block_mc(s, block, mctmp, s->obmc_weight[0], plane, -p->xoffset, dsty);
1800 2697 mctmp += p->xbsep;
1801
1802
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105183 for (x = 1; x < s->blwidth-1; x++) {
1803 102486 block_mc(s, block+x, mctmp, s->obmc_weight[1], plane, dstx, dsty);
1804 102486 dstx += p->xbsep;
1805 102486 mctmp += p->xbsep;
1806 }
1807 2697 block_mc(s, block+x, mctmp, s->obmc_weight[2], plane, dstx, dsty);
1808 2697 }
1809
1810 87 static void select_dsp_funcs(DiracContext *s, int width, int height, int xblen, int yblen)
1811 {
1812 87 int idx = 0;
1813
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87 if (xblen > 8)
1814 29 idx = 1;
1815
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87 if (xblen > 16)
1816 idx = 2;
1817
1818 87 memcpy(s->put_pixels_tab, s->diracdsp.put_dirac_pixels_tab[idx], sizeof(s->put_pixels_tab));
1819 87 memcpy(s->avg_pixels_tab, s->diracdsp.avg_dirac_pixels_tab[idx], sizeof(s->avg_pixels_tab));
1820 87 s->add_obmc = s->diracdsp.add_dirac_obmc[idx];
1821
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87 if (s->weight_log2denom > 1 || s->weight[0] != 1 || s->weight[1] != 1) {
1822 s->weight_func = s->diracdsp.weight_dirac_pixels_tab[idx];
1823 s->biweight_func = s->diracdsp.biweight_dirac_pixels_tab[idx];
1824 } else {
1825 87 s->weight_func = NULL;
1826 87 s->biweight_func = NULL;
1827 }
1828 87 }
1829
1830 171 static int interpolate_refplane(DiracContext *s, DiracFrame *ref, int plane, int width, int height)
1831 {
1832 /* chroma allocates an edge of 8 when subsampled
1833 which for 4:2:2 means an h edge of 16 and v edge of 8
1834 just use 8 for everything for the moment */
1835 171 int i, edge = EDGE_WIDTH/2;
1836
1837 171 ref->hpel[plane][0] = ref->avframe->data[plane];
1838 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 */
1839
1840 /* no need for hpel if we only have fpel vectors */
1841
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171 if (!s->mv_precision)
1842 171 return 0;
1843
1844 for (i = 1; i < 4; i++) {
1845 if (!ref->hpel_base[plane][i])
1846 ref->hpel_base[plane][i] = av_malloc((height+2*edge) * ref->avframe->linesize[plane] + 32);
1847 if (!ref->hpel_base[plane][i]) {
1848 return AVERROR(ENOMEM);
1849 }
1850 /* we need to be 16-byte aligned even for chroma */
1851 ref->hpel[plane][i] = ref->hpel_base[plane][i] + edge*ref->avframe->linesize[plane] + 16;
1852 }
1853
1854 if (!ref->interpolated[plane]) {
1855 s->diracdsp.dirac_hpel_filter(ref->hpel[plane][1], ref->hpel[plane][2],
1856 ref->hpel[plane][3], ref->hpel[plane][0],
1857 ref->avframe->linesize[plane], width, height);
1858 s->mpvencdsp.draw_edges(ref->hpel[plane][1], ref->avframe->linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM);
1859 s->mpvencdsp.draw_edges(ref->hpel[plane][2], ref->avframe->linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM);
1860 s->mpvencdsp.draw_edges(ref->hpel[plane][3], ref->avframe->linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM);
1861 }
1862 ref->interpolated[plane] = 1;
1863
1864 return 0;
1865 }
1866
1867 /**
1868 * Dirac Specification ->
1869 * 13.0 Transform data syntax. transform_data()
1870 */
1871 260 static int dirac_decode_frame_internal(DiracContext *s)
1872 {
1873 DWTContext d;
1874 int y, i, comp, dsty;
1875 int ret;
1876
1877
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260 if (s->low_delay) {
1878 /* [DIRAC_STD] 13.5.1 low_delay_transform_data() */
1879
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229 if (!s->hq_picture) {
1880
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124 for (comp = 0; comp < 3; comp++) {
1881 93 Plane *p = &s->plane[comp];
1882 93 memset(p->idwt.buf, 0, p->idwt.stride * p->idwt.height);
1883 }
1884 }
1885
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229 if (!s->zero_res) {
1886
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229 if ((ret = decode_lowdelay(s)) < 0)
1887 return ret;
1888 }
1889 }
1890
1891
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1040 for (comp = 0; comp < 3; comp++) {
1892 780 Plane *p = &s->plane[comp];
1893 780 uint8_t *frame = s->current_picture->avframe->data[comp];
1894
1895 /* FIXME: small resolutions */
1896
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3900 for (i = 0; i < 4; i++)
1897 3120 s->edge_emu_buffer[i] = s->edge_emu_buffer_base + i*FFALIGN(p->width, 16);
1898
1899
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780 if (!s->zero_res && !s->low_delay)
1900 {
1901 93 memset(p->idwt.buf, 0, p->idwt.stride * p->idwt.height);
1902 93 ret = decode_component(s, comp); /* [DIRAC_STD] 13.4.1 core_transform_data() */
1903
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93 if (ret < 0)
1904 return ret;
1905 }
1906 780 ret = ff_spatial_idwt_init(&d, &p->idwt, s->wavelet_idx+2,
1907 780 s->wavelet_depth, s->bit_depth);
1908
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780 if (ret < 0)
1909 return ret;
1910
1911
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780 if (!s->num_refs) { /* intra */
1912
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11436 for (y = 0; y < p->height; y += 16) {
1913 10743 int idx = (s->bit_depth - 8) >> 1;
1914 10743 ff_spatial_idwt_slice2(&d, y+16); /* decode */
1915 10743 s->diracdsp.put_signed_rect_clamped[idx](frame + y*p->stride,
1916 10743 p->stride,
1917 10743 p->idwt.buf + y*p->idwt.stride,
1918 p->idwt.stride, p->width, 16);
1919 }
1920 } else { /* inter */
1921 87 int rowheight = p->ybsep*p->stride;
1922
1923 87 select_dsp_funcs(s, p->width, p->height, p->xblen, p->yblen);
1924
1925
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258 for (i = 0; i < s->num_refs; i++) {
1926 171 int ret = interpolate_refplane(s, s->ref_pics[i], comp, p->width, p->height);
1927
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171 if (ret < 0)
1928 return ret;
1929 }
1930
1931 87 memset(s->mctmp, 0, 4*p->yoffset*p->stride);
1932
1933 87 dsty = -p->yoffset;
1934
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2784 for (y = 0; y < s->blheight; y++) {
1935 2784 int h = 0,
1936 2784 start = FFMAX(dsty, 0);
1937 2784 uint16_t *mctmp = s->mctmp + y*rowheight;
1938 2784 DiracBlock *blocks = s->blmotion + y*s->blwidth;
1939
1940 2784 init_obmc_weights(s, p, y);
1941
1942
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2784 if (y == s->blheight-1 || start+p->ybsep > p->height)
1943 174 h = p->height - start;
1944 else
1945 2610 h = p->ybsep - (start - dsty);
1946
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2784 if (h < 0)
1947 87 break;
1948
1949 2697 memset(mctmp+2*p->yoffset*p->stride, 0, 2*rowheight);
1950 2697 mc_row(s, blocks, mctmp, comp, dsty);
1951
1952 2697 mctmp += (start - dsty)*p->stride + p->xoffset;
1953 2697 ff_spatial_idwt_slice2(&d, start + h); /* decode */
1954 /* NOTE: add_rect_clamped hasn't been templated hence the shifts.
1955 * idwt.stride is passed as pixels, not in bytes as in the rest of the decoder */
1956 2697 s->diracdsp.add_rect_clamped(frame + start*p->stride, mctmp, p->stride,
1957 2697 (int16_t*)(p->idwt.buf) + start*(p->idwt.stride >> 1), (p->idwt.stride >> 1), p->width, h);
1958
1959 2697 dsty += p->ybsep;
1960 }
1961 }
1962 }
1963
1964
1965 260 return 0;
1966 }
1967
1968 260 static int get_buffer_with_edge(AVCodecContext *avctx, AVFrame *f, int flags)
1969 {
1970 int ret, i;
1971 int chroma_x_shift, chroma_y_shift;
1972 260 ret = av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_x_shift,
1973 &chroma_y_shift);
1974
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260 if (ret < 0)
1975 return ret;
1976
1977 260 f->width = avctx->width + 2 * EDGE_WIDTH;
1978 260 f->height = avctx->height + 2 * EDGE_WIDTH + 2;
1979 260 ret = ff_get_buffer(avctx, f, flags);
1980
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260 if (ret < 0)
1981 return ret;
1982
1983
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1040 for (i = 0; f->data[i]; i++) {
1984
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780 int offset = (EDGE_WIDTH >> (i && i<3 ? chroma_y_shift : 0)) *
1985 780 f->linesize[i] + 32;
1986 780 f->data[i] += offset;
1987 }
1988 260 f->width = avctx->width;
1989 260 f->height = avctx->height;
1990
1991 260 return 0;
1992 }
1993
1994 /**
1995 * Dirac Specification ->
1996 * 11.1.1 Picture Header. picture_header()
1997 */
1998 260 static int dirac_decode_picture_header(DiracContext *s)
1999 {
2000 unsigned retire, picnum;
2001 int i, j, ret;
2002 int64_t refdist, refnum;
2003 260 GetBitContext *gb = &s->gb;
2004
2005 /* [DIRAC_STD] 11.1.1 Picture Header. picture_header() PICTURE_NUM */
2006 260 picnum = s->current_picture->avframe->display_picture_number = get_bits_long(gb, 32);
2007
2008
2009 260 av_log(s->avctx,AV_LOG_DEBUG,"PICTURE_NUM: %d\n",picnum);
2010
2011 /* if this is the first keyframe after a sequence header, start our
2012 reordering from here */
2013
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260 if (s->frame_number < 0)
2014 70 s->frame_number = picnum;
2015
2016 260 s->ref_pics[0] = s->ref_pics[1] = NULL;
2017
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317 for (i = 0; i < s->num_refs; i++) {
2018 57 refnum = (picnum + dirac_get_se_golomb(gb)) & 0xFFFFFFFF;
2019 57 refdist = INT64_MAX;
2020
2021 /* find the closest reference to the one we want */
2022 /* Jordi: this is needed if the referenced picture hasn't yet arrived */
2023
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184 for (j = 0; j < MAX_REFERENCE_FRAMES && refdist; j++)
2024
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127 if (s->ref_frames[j]
2025
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127 && FFABS(s->ref_frames[j]->avframe->display_picture_number - refnum) < refdist) {
2026 127 s->ref_pics[i] = s->ref_frames[j];
2027 127 refdist = FFABS(s->ref_frames[j]->avframe->display_picture_number - refnum);
2028 }
2029
2030
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57 if (!s->ref_pics[i] || refdist)
2031 av_log(s->avctx, AV_LOG_DEBUG, "Reference not found\n");
2032
2033 /* if there were no references at all, allocate one */
2034
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57 if (!s->ref_pics[i])
2035 for (j = 0; j < MAX_FRAMES; j++)
2036 if (!s->all_frames[j].avframe->data[0]) {
2037 s->ref_pics[i] = &s->all_frames[j];
2038 ret = get_buffer_with_edge(s->avctx, s->ref_pics[i]->avframe, AV_GET_BUFFER_FLAG_REF);
2039 if (ret < 0)
2040 return ret;
2041 break;
2042 }
2043
2044
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57 if (!s->ref_pics[i]) {
2045 av_log(s->avctx, AV_LOG_ERROR, "Reference could not be allocated\n");
2046 return AVERROR_INVALIDDATA;
2047 }
2048
2049 }
2050
2051 /* retire the reference frames that are not used anymore */
2052
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260 if (s->current_picture->reference) {
2053 10 retire = (picnum + dirac_get_se_golomb(gb)) & 0xFFFFFFFF;
2054
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10 if (retire != picnum) {
2055 6 DiracFrame *retire_pic = remove_frame(s->ref_frames, retire);
2056
2057
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6 if (retire_pic)
2058 6 retire_pic->reference &= DELAYED_PIC_REF;
2059 else
2060 av_log(s->avctx, AV_LOG_DEBUG, "Frame to retire not found\n");
2061 }
2062
2063 /* if reference array is full, remove the oldest as per the spec */
2064
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10 while (add_frame(s->ref_frames, MAX_REFERENCE_FRAMES, s->current_picture)) {
2065 av_log(s->avctx, AV_LOG_ERROR, "Reference frame overflow\n");
2066 remove_frame(s->ref_frames, s->ref_frames[0]->avframe->display_picture_number)->reference &= DELAYED_PIC_REF;
2067 }
2068 }
2069
2070
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260 if (s->num_refs) {
2071 29 ret = dirac_unpack_prediction_parameters(s); /* [DIRAC_STD] 11.2 Picture Prediction Data. picture_prediction() */
2072
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29 if (ret < 0)
2073 return ret;
2074 29 ret = dirac_unpack_block_motion_data(s); /* [DIRAC_STD] 12. Block motion data syntax */
2075
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29 if (ret < 0)
2076 return ret;
2077 }
2078 260 ret = dirac_unpack_idwt_params(s); /* [DIRAC_STD] 11.3 Wavelet transform data */
2079
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260 if (ret < 0)
2080 return ret;
2081
2082 260 init_planes(s);
2083 260 return 0;
2084 }
2085
2086 36 static int get_delayed_pic(DiracContext *s, AVFrame *picture, int *got_frame)
2087 {
2088 36 DiracFrame *out = s->delay_frames[0];
2089 36 int i, out_idx = 0;
2090 int ret;
2091
2092 /* find frame with lowest picture number */
2093
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36 for (i = 1; s->delay_frames[i]; i++)
2094 if (s->delay_frames[i]->avframe->display_picture_number < out->avframe->display_picture_number) {
2095 out = s->delay_frames[i];
2096 out_idx = i;
2097 }
2098
2099
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37 for (i = out_idx; s->delay_frames[i]; i++)
2100 1 s->delay_frames[i] = s->delay_frames[i+1];
2101
2102
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36 if (out) {
2103 1 out->reference ^= DELAYED_PIC_REF;
2104
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1 if((ret = av_frame_ref(picture, out->avframe)) < 0)
2105 return ret;
2106 1 *got_frame = 1;
2107 }
2108
2109 36 return 0;
2110 }
2111
2112 /**
2113 * Dirac Specification ->
2114 * 9.6 Parse Info Header Syntax. parse_info()
2115 * 4 byte start code + byte parse code + 4 byte size + 4 byte previous size
2116 */
2117 #define DATA_UNIT_HEADER_SIZE 13
2118
2119 /* [DIRAC_STD] dirac_decode_data_unit makes reference to the while defined in 9.3
2120 inside the function parse_sequence() */
2121 757 static int dirac_decode_data_unit(AVCodecContext *avctx, const uint8_t *buf, int size)
2122 {
2123 757 DiracContext *s = avctx->priv_data;
2124 757 DiracFrame *pic = NULL;
2125 AVDiracSeqHeader *dsh;
2126 int ret, i;
2127 uint8_t parse_code;
2128 unsigned tmp;
2129
2130
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757 if (size < DATA_UNIT_HEADER_SIZE)
2131 return AVERROR_INVALIDDATA;
2132
2133 757 parse_code = buf[4];
2134
2135 757 init_get_bits(&s->gb, &buf[13], 8*(size - DATA_UNIT_HEADER_SIZE));
2136
2137
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757 if (parse_code == DIRAC_PCODE_SEQ_HEADER) {
2138
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231 if (s->seen_sequence_header)
2139 161 return 0;
2140
2141 /* [DIRAC_STD] 10. Sequence header */
2142 70 ret = av_dirac_parse_sequence_header(&dsh, buf + DATA_UNIT_HEADER_SIZE, size - DATA_UNIT_HEADER_SIZE, avctx);
2143
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70 if (ret < 0) {
2144 av_log(avctx, AV_LOG_ERROR, "error parsing sequence header");
2145 return ret;
2146 }
2147
2148
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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)
2149 ret = AVERROR(ERANGE);
2150
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70 if (ret >= 0)
2151 70 ret = ff_set_dimensions(avctx, dsh->width, dsh->height);
2152
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70 if (ret < 0) {
2153 av_freep(&dsh);
2154 return ret;
2155 }
2156
2157 70 ff_set_sar(avctx, dsh->sample_aspect_ratio);
2158 70 avctx->pix_fmt = dsh->pix_fmt;
2159 70 avctx->color_range = dsh->color_range;
2160 70 avctx->color_trc = dsh->color_trc;
2161 70 avctx->color_primaries = dsh->color_primaries;
2162 70 avctx->colorspace = dsh->colorspace;
2163 70 avctx->profile = dsh->profile;
2164 70 avctx->level = dsh->level;
2165 70 avctx->framerate = dsh->framerate;
2166 70 s->bit_depth = dsh->bit_depth;
2167 70 s->version.major = dsh->version.major;
2168 70 s->version.minor = dsh->version.minor;
2169 70 s->seq = *dsh;
2170 70 av_freep(&dsh);
2171
2172 70 s->pshift = s->bit_depth > 8;
2173
2174 70 ret = av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt,
2175 &s->chroma_x_shift,
2176 &s->chroma_y_shift);
2177
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70 if (ret < 0)
2178 return ret;
2179
2180 70 ret = alloc_sequence_buffers(s);
2181
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70 if (ret < 0)
2182 return ret;
2183
2184 70 s->seen_sequence_header = 1;
2185
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526 } else if (parse_code == DIRAC_PCODE_END_SEQ) { /* [DIRAC_STD] End of Sequence */
2186 free_sequence_buffers(s);
2187 s->seen_sequence_header = 0;
2188
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526 } else if (parse_code == DIRAC_PCODE_AUX) {
2189
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266 if (buf[13] == 1) { /* encoder implementation/version */
2190 int ver[3];
2191 /* versions older than 1.0.8 don't store quant delta for
2192 subbands with only one codeblock */
2193
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4 if (sscanf(buf+14, "Schroedinger %d.%d.%d", ver, ver+1, ver+2) == 3)
2194
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4 if (ver[0] == 1 && ver[1] == 0 && ver[2] <= 7)
2195 s->old_delta_quant = 1;
2196 }
2197
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260 } else if (parse_code & 0x8) { /* picture data unit */
2198
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260 if (!s->seen_sequence_header) {
2199 av_log(avctx, AV_LOG_DEBUG, "Dropping frame without sequence header\n");
2200 return AVERROR_INVALIDDATA;
2201 }
2202
2203 /* find an unused frame */
2204
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3900 for (i = 0; i < MAX_FRAMES; i++)
2205
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3640 if (s->all_frames[i].avframe->data[0] == NULL)
2206 3559 pic = &s->all_frames[i];
2207
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260 if (!pic) {
2208 av_log(avctx, AV_LOG_ERROR, "framelist full\n");
2209 return AVERROR_INVALIDDATA;
2210 }
2211
2212 260 av_frame_unref(pic->avframe);
2213
2214 /* [DIRAC_STD] Defined in 9.6.1 ... */
2215 260 tmp = parse_code & 0x03; /* [DIRAC_STD] num_refs() */
2216
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260 if (tmp > 2) {
2217 av_log(avctx, AV_LOG_ERROR, "num_refs of 3\n");
2218 return AVERROR_INVALIDDATA;
2219 }
2220 260 s->num_refs = tmp;
2221 260 s->is_arith = (parse_code & 0x48) == 0x08; /* [DIRAC_STD] using_ac() */
2222 260 s->low_delay = (parse_code & 0x88) == 0x88; /* [DIRAC_STD] is_low_delay() */
2223 260 s->core_syntax = (parse_code & 0x88) == 0x08; /* [DIRAC_STD] is_core_syntax() */
2224 260 s->ld_picture = (parse_code & 0xF8) == 0xC8; /* [DIRAC_STD] is_ld_picture() */
2225 260 s->hq_picture = (parse_code & 0xF8) == 0xE8; /* [DIRAC_STD] is_hq_picture() */
2226 260 s->dc_prediction = (parse_code & 0x28) == 0x08; /* [DIRAC_STD] using_dc_prediction() */
2227 260 pic->reference = (parse_code & 0x0C) == 0x0C; /* [DIRAC_STD] is_reference() */
2228 260 pic->avframe->key_frame = s->num_refs == 0; /* [DIRAC_STD] is_intra() */
2229 260 pic->avframe->pict_type = s->num_refs + 1; /* Definition of AVPictureType in avutil.h */
2230
2231 /* VC-2 Low Delay has a different parse code than the Dirac Low Delay */
2232
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260 if (s->version.minor == 2 && parse_code == 0x88)
2233 31 s->ld_picture = 1;
2234
2235
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260 if (s->low_delay && !(s->ld_picture || s->hq_picture) ) {
2236 av_log(avctx, AV_LOG_ERROR, "Invalid low delay flag\n");
2237 return AVERROR_INVALIDDATA;
2238 }
2239
2240
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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)
2241 return ret;
2242 260 s->current_picture = pic;
2243 260 s->plane[0].stride = pic->avframe->linesize[0];
2244 260 s->plane[1].stride = pic->avframe->linesize[1];
2245 260 s->plane[2].stride = pic->avframe->linesize[2];
2246
2247
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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)
2248 return AVERROR(ENOMEM);
2249
2250 /* [DIRAC_STD] 11.1 Picture parse. picture_parse() */
2251 260 ret = dirac_decode_picture_header(s);
2252
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260 if (ret < 0)
2253 return ret;
2254
2255 /* [DIRAC_STD] 13.0 Transform data syntax. transform_data() */
2256 260 ret = dirac_decode_frame_internal(s);
2257
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260 if (ret < 0)
2258 return ret;
2259 }
2260 596 return 0;
2261 }
2262
2263 298 static int dirac_decode_frame(AVCodecContext *avctx, AVFrame *picture,
2264 int *got_frame, AVPacket *pkt)
2265 {
2266 298 DiracContext *s = avctx->priv_data;
2267 298 const uint8_t *buf = pkt->data;
2268 298 int buf_size = pkt->size;
2269 298 int i, buf_idx = 0;
2270 int ret;
2271 unsigned data_unit_size;
2272
2273 /* release unused frames */
2274
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4470 for (i = 0; i < MAX_FRAMES; i++)
2275
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4172 if (s->all_frames[i].avframe->data[0] && !s->all_frames[i].reference) {
2276 222 av_frame_unref(s->all_frames[i].avframe);
2277 222 memset(s->all_frames[i].interpolated, 0, sizeof(s->all_frames[i].interpolated));
2278 }
2279
2280 298 s->current_picture = NULL;
2281 298 *got_frame = 0;
2282
2283 /* end of stream, so flush delayed pics */
2284
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298 if (buf_size == 0)
2285 36 return get_delayed_pic(s, picture, got_frame);
2286
2287 for (;;) {
2288 /*[DIRAC_STD] Here starts the code from parse_info() defined in 9.6
2289 [DIRAC_STD] PARSE_INFO_PREFIX = "BBCD" as defined in ISO/IEC 646
2290 BBCD start code search */
2291
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1019 for (; buf_idx + DATA_UNIT_HEADER_SIZE < buf_size; buf_idx++) {
2292
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757 if (buf[buf_idx ] == 'B' && buf[buf_idx+1] == 'B' &&
2293
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757 buf[buf_idx+2] == 'C' && buf[buf_idx+3] == 'D')
2294 757 break;
2295 }
2296 /* BBCD found or end of data */
2297
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1019 if (buf_idx + DATA_UNIT_HEADER_SIZE >= buf_size)
2298 262 break;
2299
2300 757 data_unit_size = AV_RB32(buf+buf_idx+5);
2301
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757 if (data_unit_size > buf_size - buf_idx || !data_unit_size) {
2302 if(data_unit_size > buf_size - buf_idx)
2303 av_log(s->avctx, AV_LOG_ERROR,
2304 "Data unit with size %d is larger than input buffer, discarding\n",
2305 data_unit_size);
2306 buf_idx += 4;
2307 continue;
2308 }
2309 /* [DIRAC_STD] dirac_decode_data_unit makes reference to the while defined in 9.3 inside the function parse_sequence() */
2310 757 ret = dirac_decode_data_unit(avctx, buf+buf_idx, data_unit_size);
2311
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757 if (ret < 0)
2312 {
2313 av_log(s->avctx, AV_LOG_ERROR,"Error in dirac_decode_data_unit\n");
2314 return ret;
2315 }
2316 757 buf_idx += data_unit_size;
2317 }
2318
2319
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262 if (!s->current_picture)
2320 2 return buf_size;
2321
2322
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260 if (s->current_picture->avframe->display_picture_number > s->frame_number) {
2323 8 DiracFrame *delayed_frame = remove_frame(s->delay_frames, s->frame_number);
2324
2325 8 s->current_picture->reference |= DELAYED_PIC_REF;
2326
2327
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8 if (add_frame(s->delay_frames, MAX_DELAY, s->current_picture)) {
2328 int min_num = s->delay_frames[0]->avframe->display_picture_number;
2329 /* Too many delayed frames, so we display the frame with the lowest pts */
2330 av_log(avctx, AV_LOG_ERROR, "Delay frame overflow\n");
2331
2332 for (i = 1; s->delay_frames[i]; i++)
2333 if (s->delay_frames[i]->avframe->display_picture_number < min_num)
2334 min_num = s->delay_frames[i]->avframe->display_picture_number;
2335
2336 delayed_frame = remove_frame(s->delay_frames, min_num);
2337 add_frame(s->delay_frames, MAX_DELAY, s->current_picture);
2338 }
2339
2340
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8 if (delayed_frame) {
2341 7 delayed_frame->reference ^= DELAYED_PIC_REF;
2342
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7 if((ret = av_frame_ref(picture, delayed_frame->avframe)) < 0)
2343 return ret;
2344 7 *got_frame = 1;
2345 }
2346
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252 } else if (s->current_picture->avframe->display_picture_number == s->frame_number) {
2347 /* The right frame at the right time :-) */
2348
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252 if((ret = av_frame_ref(picture, s->current_picture->avframe)) < 0)
2349 return ret;
2350 252 *got_frame = 1;
2351 }
2352
2353
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260 if (*got_frame)
2354 259 s->frame_number = picture->display_picture_number + 1LL;
2355
2356 260 return buf_idx;
2357 }
2358
2359 const FFCodec ff_dirac_decoder = {
2360 .p.name = "dirac",
2361 .p.long_name = NULL_IF_CONFIG_SMALL("BBC Dirac VC-2"),
2362 .p.type = AVMEDIA_TYPE_VIDEO,
2363 .p.id = AV_CODEC_ID_DIRAC,
2364 .priv_data_size = sizeof(DiracContext),
2365 .init = dirac_decode_init,
2366 .close = dirac_decode_end,
2367 FF_CODEC_DECODE_CB(dirac_decode_frame),
2368 .p.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS | AV_CODEC_CAP_DR1,
2369 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
2370 .flush = dirac_decode_flush,
2371 };
2372