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1 | /* |
2 | * Copyright (C) 2007 Marco Gerards <marco@gnu.org> | |
3 | * Copyright (C) 2009 David Conrad | |
4 | * Copyright (C) 2011 Jordi Ortiz | |
5 | * | |
6 | * This file is part of FFmpeg. | |
7 | * | |
8 | * FFmpeg is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License as published by the Free Software Foundation; either | |
11 | * version 2.1 of the License, or (at your option) any later version. | |
12 | * | |
13 | * FFmpeg is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * Lesser General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public | |
19 | * License along with FFmpeg; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | */ | |
22 | ||
23 | /** | |
24 | * @file | |
25 | * Dirac Decoder | |
26 | * @author Marco Gerards <marco@gnu.org>, David Conrad, Jordi Ortiz <nenjordi@gmail.com> | |
27 | */ | |
28 | ||
29 | #include "avcodec.h" | |
30 | #include "get_bits.h" | |
31 | #include "bytestream.h" | |
32 | #include "internal.h" | |
33 | #include "golomb.h" | |
34 | #include "dirac_arith.h" | |
35 | #include "mpeg12data.h" | |
36 | #include "libavcodec/mpegvideo.h" | |
37 | #include "mpegvideoencdsp.h" | |
38 | #include "dirac_dwt.h" | |
39 | #include "dirac.h" | |
40 | #include "diracdsp.h" | |
41 | #include "videodsp.h" | |
42 | ||
43 | /** | |
44 | * The spec limits the number of wavelet decompositions to 4 for both | |
45 | * level 1 (VC-2) and 128 (long-gop default). | |
46 | * 5 decompositions is the maximum before >16-bit buffers are needed. | |
47 | * Schroedinger allows this for DD 9,7 and 13,7 wavelets only, limiting | |
48 | * the others to 4 decompositions (or 3 for the fidelity filter). | |
49 | * | |
50 | * We use this instead of MAX_DECOMPOSITIONS to save some memory. | |
51 | */ | |
52 | #define MAX_DWT_LEVELS 5 | |
53 | ||
54 | /** | |
55 | * The spec limits this to 3 for frame coding, but in practice can be as high as 6 | |
56 | */ | |
57 | #define MAX_REFERENCE_FRAMES 8 | |
58 | #define MAX_DELAY 5 /* limit for main profile for frame coding (TODO: field coding) */ | |
59 | #define MAX_FRAMES (MAX_REFERENCE_FRAMES + MAX_DELAY + 1) | |
60 | #define MAX_QUANT 68 /* max quant for VC-2 */ | |
61 | #define MAX_BLOCKSIZE 32 /* maximum xblen/yblen we support */ | |
62 | ||
63 | /** | |
64 | * DiracBlock->ref flags, if set then the block does MC from the given ref | |
65 | */ | |
66 | #define DIRAC_REF_MASK_REF1 1 | |
67 | #define DIRAC_REF_MASK_REF2 2 | |
68 | #define DIRAC_REF_MASK_GLOBAL 4 | |
69 | ||
70 | /** | |
71 | * Value of Picture.reference when Picture is not a reference picture, but | |
72 | * is held for delayed output. | |
73 | */ | |
74 | #define DELAYED_PIC_REF 4 | |
75 | ||
76 | #define CALC_PADDING(size, depth) \ | |
77 | (((size + (1 << depth) - 1) >> depth) << depth) | |
78 | ||
79 | #define DIVRNDUP(a, b) (((a) + (b) - 1) / (b)) | |
80 | ||
81 | typedef struct { | |
82 | AVFrame *avframe; | |
83 | int interpolated[3]; /* 1 if hpel[] is valid */ | |
84 | uint8_t *hpel[3][4]; | |
85 | uint8_t *hpel_base[3][4]; | |
86 | } DiracFrame; | |
87 | ||
88 | typedef struct { | |
89 | union { | |
90 | int16_t mv[2][2]; | |
91 | int16_t dc[3]; | |
92 | } u; /* anonymous unions aren't in C99 :( */ | |
93 | uint8_t ref; | |
94 | } DiracBlock; | |
95 | ||
96 | typedef struct SubBand { | |
97 | int level; | |
98 | int orientation; | |
99 | int stride; | |
100 | int width; | |
101 | int height; | |
102 | int quant; | |
103 | IDWTELEM *ibuf; | |
104 | struct SubBand *parent; | |
105 | ||
106 | /* for low delay */ | |
107 | unsigned length; | |
108 | const uint8_t *coeff_data; | |
109 | } SubBand; | |
110 | ||
111 | typedef struct Plane { | |
112 | int width; | |
113 | int height; | |
114 | ptrdiff_t stride; | |
115 | ||
116 | int idwt_width; | |
117 | int idwt_height; | |
118 | int idwt_stride; | |
119 | IDWTELEM *idwt_buf; | |
120 | IDWTELEM *idwt_buf_base; | |
121 | IDWTELEM *idwt_tmp; | |
122 | ||
123 | /* block length */ | |
124 | uint8_t xblen; | |
125 | uint8_t yblen; | |
126 | /* block separation (block n+1 starts after this many pixels in block n) */ | |
127 | uint8_t xbsep; | |
128 | uint8_t ybsep; | |
129 | /* amount of overspill on each edge (half of the overlap between blocks) */ | |
130 | uint8_t xoffset; | |
131 | uint8_t yoffset; | |
132 | ||
133 | SubBand band[MAX_DWT_LEVELS][4]; | |
134 | } Plane; | |
135 | ||
136 | typedef struct DiracContext { | |
137 | AVCodecContext *avctx; | |
138 | MpegvideoEncDSPContext mpvencdsp; | |
139 | VideoDSPContext vdsp; | |
140 | DiracDSPContext diracdsp; | |
141 | GetBitContext gb; | |
142 | dirac_source_params source; | |
143 | int seen_sequence_header; | |
144 | int frame_number; /* number of the next frame to display */ | |
145 | Plane plane[3]; | |
146 | int chroma_x_shift; | |
147 | int chroma_y_shift; | |
148 | ||
149 | int zero_res; /* zero residue flag */ | |
150 | int is_arith; /* whether coeffs use arith or golomb coding */ | |
151 | int low_delay; /* use the low delay syntax */ | |
152 | int globalmc_flag; /* use global motion compensation */ | |
153 | int num_refs; /* number of reference pictures */ | |
154 | ||
155 | /* wavelet decoding */ | |
156 | unsigned wavelet_depth; /* depth of the IDWT */ | |
157 | unsigned wavelet_idx; | |
158 | ||
159 | /** | |
160 | * schroedinger older than 1.0.8 doesn't store | |
161 | * quant delta if only one codebook exists in a band | |
162 | */ | |
163 | unsigned old_delta_quant; | |
164 | unsigned codeblock_mode; | |
165 | ||
166 | struct { | |
167 | unsigned width; | |
168 | unsigned height; | |
169 | } codeblock[MAX_DWT_LEVELS+1]; | |
170 | ||
171 | struct { | |
172 | unsigned num_x; /* number of horizontal slices */ | |
173 | unsigned num_y; /* number of vertical slices */ | |
174 | AVRational bytes; /* average bytes per slice */ | |
175 | uint8_t quant[MAX_DWT_LEVELS][4]; /* [DIRAC_STD] E.1 */ | |
176 | } lowdelay; | |
177 | ||
178 | struct { | |
179 | int pan_tilt[2]; /* pan/tilt vector */ | |
180 | int zrs[2][2]; /* zoom/rotate/shear matrix */ | |
181 | int perspective[2]; /* perspective vector */ | |
182 | unsigned zrs_exp; | |
183 | unsigned perspective_exp; | |
184 | } globalmc[2]; | |
185 | ||
186 | /* motion compensation */ | |
187 | uint8_t mv_precision; /* [DIRAC_STD] REFS_WT_PRECISION */ | |
188 | int16_t weight[2]; /* [DIRAC_STD] REF1_WT and REF2_WT */ | |
189 | unsigned weight_log2denom; /* [DIRAC_STD] REFS_WT_PRECISION */ | |
190 | ||
191 | int blwidth; /* number of blocks (horizontally) */ | |
192 | int blheight; /* number of blocks (vertically) */ | |
193 | int sbwidth; /* number of superblocks (horizontally) */ | |
194 | int sbheight; /* number of superblocks (vertically) */ | |
195 | ||
196 | uint8_t *sbsplit; | |
197 | DiracBlock *blmotion; | |
198 | ||
199 | uint8_t *edge_emu_buffer[4]; | |
200 | uint8_t *edge_emu_buffer_base; | |
201 | ||
202 | uint16_t *mctmp; /* buffer holding the MC data multiplied by OBMC weights */ | |
203 | uint8_t *mcscratch; | |
204 | int buffer_stride; | |
205 | ||
206 | DECLARE_ALIGNED(16, uint8_t, obmc_weight)[3][MAX_BLOCKSIZE*MAX_BLOCKSIZE]; | |
207 | ||
208 | void (*put_pixels_tab[4])(uint8_t *dst, const uint8_t *src[5], int stride, int h); | |
209 | void (*avg_pixels_tab[4])(uint8_t *dst, const uint8_t *src[5], int stride, int h); | |
210 | void (*add_obmc)(uint16_t *dst, const uint8_t *src, int stride, const uint8_t *obmc_weight, int yblen); | |
211 | dirac_weight_func weight_func; | |
212 | dirac_biweight_func biweight_func; | |
213 | ||
214 | DiracFrame *current_picture; | |
215 | DiracFrame *ref_pics[2]; | |
216 | ||
217 | DiracFrame *ref_frames[MAX_REFERENCE_FRAMES+1]; | |
218 | DiracFrame *delay_frames[MAX_DELAY+1]; | |
219 | DiracFrame all_frames[MAX_FRAMES]; | |
220 | } DiracContext; | |
221 | ||
222 | /** | |
223 | * Dirac Specification -> | |
224 | * Parse code values. 9.6.1 Table 9.1 | |
225 | */ | |
226 | enum dirac_parse_code { | |
227 | pc_seq_header = 0x00, | |
228 | pc_eos = 0x10, | |
229 | pc_aux_data = 0x20, | |
230 | pc_padding = 0x30, | |
231 | }; | |
232 | ||
233 | enum dirac_subband { | |
234 | subband_ll = 0, | |
235 | subband_hl = 1, | |
236 | subband_lh = 2, | |
237 | subband_hh = 3, | |
238 | subband_nb, | |
239 | }; | |
240 | ||
241 | static const uint8_t default_qmat[][4][4] = { | |
242 | { { 5, 3, 3, 0}, { 0, 4, 4, 1}, { 0, 5, 5, 2}, { 0, 6, 6, 3} }, | |
243 | { { 4, 2, 2, 0}, { 0, 4, 4, 2}, { 0, 5, 5, 3}, { 0, 7, 7, 5} }, | |
244 | { { 5, 3, 3, 0}, { 0, 4, 4, 1}, { 0, 5, 5, 2}, { 0, 6, 6, 3} }, | |
245 | { { 8, 4, 4, 0}, { 0, 4, 4, 0}, { 0, 4, 4, 0}, { 0, 4, 4, 0} }, | |
246 | { { 8, 4, 4, 0}, { 0, 4, 4, 0}, { 0, 4, 4, 0}, { 0, 4, 4, 0} }, | |
247 | { { 0, 4, 4, 8}, { 0, 8, 8, 12}, { 0, 13, 13, 17}, { 0, 17, 17, 21} }, | |
248 | { { 3, 1, 1, 0}, { 0, 4, 4, 2}, { 0, 6, 6, 5}, { 0, 9, 9, 7} }, | |
249 | }; | |
250 | ||
251 | static const int qscale_tab[MAX_QUANT+1] = { | |
252 | 4, 5, 6, 7, 8, 10, 11, 13, | |
253 | 16, 19, 23, 27, 32, 38, 45, 54, | |
254 | 64, 76, 91, 108, 128, 152, 181, 215, | |
255 | 256, 304, 362, 431, 512, 609, 724, 861, | |
256 | 1024, 1218, 1448, 1722, 2048, 2435, 2896, 3444, | |
257 | 4096, 4871, 5793, 6889, 8192, 9742, 11585, 13777, | |
258 | 16384, 19484, 23170, 27554, 32768, 38968, 46341, 55109, | |
259 | 65536, 77936 | |
260 | }; | |
261 | ||
262 | static const int qoffset_intra_tab[MAX_QUANT+1] = { | |
263 | 1, 2, 3, 4, 4, 5, 6, 7, | |
264 | 8, 10, 12, 14, 16, 19, 23, 27, | |
265 | 32, 38, 46, 54, 64, 76, 91, 108, | |
266 | 128, 152, 181, 216, 256, 305, 362, 431, | |
267 | 512, 609, 724, 861, 1024, 1218, 1448, 1722, | |
268 | 2048, 2436, 2897, 3445, 4096, 4871, 5793, 6889, | |
269 | 8192, 9742, 11585, 13777, 16384, 19484, 23171, 27555, | |
270 | 32768, 38968 | |
271 | }; | |
272 | ||
273 | static const int qoffset_inter_tab[MAX_QUANT+1] = { | |
274 | 1, 2, 2, 3, 3, 4, 4, 5, | |
275 | 6, 7, 9, 10, 12, 14, 17, 20, | |
276 | 24, 29, 34, 41, 48, 57, 68, 81, | |
277 | 96, 114, 136, 162, 192, 228, 272, 323, | |
278 | 384, 457, 543, 646, 768, 913, 1086, 1292, | |
279 | 1536, 1827, 2172, 2583, 3072, 3653, 4344, 5166, | |
280 | 6144, 7307, 8689, 10333, 12288, 14613, 17378, 20666, | |
281 | 24576, 29226 | |
282 | }; | |
283 | ||
284 | /* magic number division by 3 from schroedinger */ | |
285 | static inline int divide3(int x) | |
286 | { | |
287 | return ((x+1)*21845 + 10922) >> 16; | |
288 | } | |
289 | ||
290 | static DiracFrame *remove_frame(DiracFrame *framelist[], int picnum) | |
291 | { | |
292 | DiracFrame *remove_pic = NULL; | |
293 | int i, remove_idx = -1; | |
294 | ||
295 | for (i = 0; framelist[i]; i++) | |
296 | if (framelist[i]->avframe->display_picture_number == picnum) { | |
297 | remove_pic = framelist[i]; | |
298 | remove_idx = i; | |
299 | } | |
300 | ||
301 | if (remove_pic) | |
302 | for (i = remove_idx; framelist[i]; i++) | |
303 | framelist[i] = framelist[i+1]; | |
304 | ||
305 | return remove_pic; | |
306 | } | |
307 | ||
308 | static int add_frame(DiracFrame *framelist[], int maxframes, DiracFrame *frame) | |
309 | { | |
310 | int i; | |
311 | for (i = 0; i < maxframes; i++) | |
312 | if (!framelist[i]) { | |
313 | framelist[i] = frame; | |
314 | return 0; | |
315 | } | |
316 | return -1; | |
317 | } | |
318 | ||
319 | static int alloc_sequence_buffers(DiracContext *s) | |
320 | { | |
321 | int sbwidth = DIVRNDUP(s->source.width, 4); | |
322 | int sbheight = DIVRNDUP(s->source.height, 4); | |
323 | int i, w, h, top_padding; | |
324 | ||
325 | /* todo: think more about this / use or set Plane here */ | |
326 | for (i = 0; i < 3; i++) { | |
327 | int max_xblen = MAX_BLOCKSIZE >> (i ? s->chroma_x_shift : 0); | |
328 | int max_yblen = MAX_BLOCKSIZE >> (i ? s->chroma_y_shift : 0); | |
329 | w = s->source.width >> (i ? s->chroma_x_shift : 0); | |
330 | h = s->source.height >> (i ? s->chroma_y_shift : 0); | |
331 | ||
332 | /* we allocate the max we support here since num decompositions can | |
333 | * change from frame to frame. Stride is aligned to 16 for SIMD, and | |
334 | * 1<<MAX_DWT_LEVELS top padding to avoid if(y>0) in arith decoding | |
335 | * MAX_BLOCKSIZE padding for MC: blocks can spill up to half of that | |
336 | * on each side */ | |
337 | top_padding = FFMAX(1<<MAX_DWT_LEVELS, max_yblen/2); | |
338 | w = FFALIGN(CALC_PADDING(w, MAX_DWT_LEVELS), 8); /* FIXME: Should this be 16 for SSE??? */ | |
339 | h = top_padding + CALC_PADDING(h, MAX_DWT_LEVELS) + max_yblen/2; | |
340 | ||
341 | s->plane[i].idwt_buf_base = av_mallocz_array((w+max_xblen), h * sizeof(IDWTELEM)); | |
342 | s->plane[i].idwt_tmp = av_malloc_array((w+16), sizeof(IDWTELEM)); | |
343 | s->plane[i].idwt_buf = s->plane[i].idwt_buf_base + top_padding*w; | |
344 | if (!s->plane[i].idwt_buf_base || !s->plane[i].idwt_tmp) | |
345 | return AVERROR(ENOMEM); | |
346 | } | |
347 | ||
348 | /* fixme: allocate using real stride here */ | |
349 | s->sbsplit = av_malloc_array(sbwidth, sbheight); | |
350 | s->blmotion = av_malloc_array(sbwidth, sbheight * 16 * sizeof(*s->blmotion)); | |
351 | ||
352 | if (!s->sbsplit || !s->blmotion) | |
353 | return AVERROR(ENOMEM); | |
354 | return 0; | |
355 | } | |
356 | ||
357 | static int alloc_buffers(DiracContext *s, int stride) | |
358 | { | |
359 | int w = s->source.width; | |
360 | int h = s->source.height; | |
361 | ||
362 | av_assert0(stride >= w); | |
363 | stride += 64; | |
364 | ||
365 | if (s->buffer_stride >= stride) | |
366 | return 0; | |
367 | s->buffer_stride = 0; | |
368 | ||
369 | av_freep(&s->edge_emu_buffer_base); | |
370 | memset(s->edge_emu_buffer, 0, sizeof(s->edge_emu_buffer)); | |
371 | av_freep(&s->mctmp); | |
372 | av_freep(&s->mcscratch); | |
373 | ||
374 | s->edge_emu_buffer_base = av_malloc_array(stride, MAX_BLOCKSIZE); | |
375 | ||
376 | s->mctmp = av_malloc_array((stride+MAX_BLOCKSIZE), (h+MAX_BLOCKSIZE) * sizeof(*s->mctmp)); | |
377 | s->mcscratch = av_malloc_array(stride, MAX_BLOCKSIZE); | |
378 | ||
379 | if (!s->edge_emu_buffer_base || !s->mctmp || !s->mcscratch) | |
380 | return AVERROR(ENOMEM); | |
381 | ||
382 | s->buffer_stride = stride; | |
383 | return 0; | |
384 | } | |
385 | ||
386 | static void free_sequence_buffers(DiracContext *s) | |
387 | { | |
388 | int i, j, k; | |
389 | ||
390 | for (i = 0; i < MAX_FRAMES; i++) { | |
391 | if (s->all_frames[i].avframe->data[0]) { | |
392 | av_frame_unref(s->all_frames[i].avframe); | |
393 | memset(s->all_frames[i].interpolated, 0, sizeof(s->all_frames[i].interpolated)); | |
394 | } | |
395 | ||
396 | for (j = 0; j < 3; j++) | |
397 | for (k = 1; k < 4; k++) | |
398 | av_freep(&s->all_frames[i].hpel_base[j][k]); | |
399 | } | |
400 | ||
401 | memset(s->ref_frames, 0, sizeof(s->ref_frames)); | |
402 | memset(s->delay_frames, 0, sizeof(s->delay_frames)); | |
403 | ||
404 | for (i = 0; i < 3; i++) { | |
405 | av_freep(&s->plane[i].idwt_buf_base); | |
406 | av_freep(&s->plane[i].idwt_tmp); | |
407 | } | |
408 | ||
409 | s->buffer_stride = 0; | |
410 | av_freep(&s->sbsplit); | |
411 | av_freep(&s->blmotion); | |
412 | av_freep(&s->edge_emu_buffer_base); | |
413 | ||
414 | av_freep(&s->mctmp); | |
415 | av_freep(&s->mcscratch); | |
416 | } | |
417 | ||
418 | static av_cold int dirac_decode_init(AVCodecContext *avctx) | |
419 | { | |
420 | DiracContext *s = avctx->priv_data; | |
421 | int i; | |
422 | ||
423 | s->avctx = avctx; | |
424 | s->frame_number = -1; | |
425 | ||
426 | ff_diracdsp_init(&s->diracdsp); | |
427 | ff_mpegvideoencdsp_init(&s->mpvencdsp, avctx); | |
428 | ff_videodsp_init(&s->vdsp, 8); | |
429 | ||
430 | for (i = 0; i < MAX_FRAMES; i++) { | |
431 | s->all_frames[i].avframe = av_frame_alloc(); | |
432 | if (!s->all_frames[i].avframe) { | |
433 | while (i > 0) | |
434 | av_frame_free(&s->all_frames[--i].avframe); | |
435 | return AVERROR(ENOMEM); | |
436 | } | |
437 | } | |
438 | ||
439 | return 0; | |
440 | } | |
441 | ||
442 | static void dirac_decode_flush(AVCodecContext *avctx) | |
443 | { | |
444 | DiracContext *s = avctx->priv_data; | |
445 | free_sequence_buffers(s); | |
446 | s->seen_sequence_header = 0; | |
447 | s->frame_number = -1; | |
448 | } | |
449 | ||
450 | static av_cold int dirac_decode_end(AVCodecContext *avctx) | |
451 | { | |
452 | DiracContext *s = avctx->priv_data; | |
453 | int i; | |
454 | ||
455 | dirac_decode_flush(avctx); | |
456 | for (i = 0; i < MAX_FRAMES; i++) | |
457 | av_frame_free(&s->all_frames[i].avframe); | |
458 | ||
459 | return 0; | |
460 | } | |
461 | ||
462 | #define SIGN_CTX(x) (CTX_SIGN_ZERO + ((x) > 0) - ((x) < 0)) | |
463 | ||
464 | static inline void coeff_unpack_arith(DiracArith *c, int qfactor, int qoffset, | |
465 | SubBand *b, IDWTELEM *buf, int x, int y) | |
466 | { | |
467 | int coeff, sign; | |
468 | int sign_pred = 0; | |
469 | int pred_ctx = CTX_ZPZN_F1; | |
470 | ||
471 | /* Check if the parent subband has a 0 in the corresponding position */ | |
472 | if (b->parent) | |
473 | pred_ctx += !!b->parent->ibuf[b->parent->stride * (y>>1) + (x>>1)] << 1; | |
474 | ||
475 | if (b->orientation == subband_hl) | |
476 | sign_pred = buf[-b->stride]; | |
477 | ||
478 | /* Determine if the pixel has only zeros in its neighbourhood */ | |
479 | if (x) { | |
480 | pred_ctx += !(buf[-1] | buf[-b->stride] | buf[-1-b->stride]); | |
481 | if (b->orientation == subband_lh) | |
482 | sign_pred = buf[-1]; | |
483 | } else { | |
484 | pred_ctx += !buf[-b->stride]; | |
485 | } | |
486 | ||
487 | coeff = dirac_get_arith_uint(c, pred_ctx, CTX_COEFF_DATA); | |
488 | if (coeff) { | |
489 | coeff = (coeff * qfactor + qoffset + 2) >> 2; | |
490 | sign = dirac_get_arith_bit(c, SIGN_CTX(sign_pred)); | |
491 | coeff = (coeff ^ -sign) + sign; | |
492 | } | |
493 | *buf = coeff; | |
494 | } | |
495 | ||
496 | static inline int coeff_unpack_golomb(GetBitContext *gb, int qfactor, int qoffset) | |
497 | { | |
498 | int sign, coeff; | |
499 | ||
500 | coeff = svq3_get_ue_golomb(gb); | |
501 | if (coeff) { | |
502 | coeff = (coeff * qfactor + qoffset + 2) >> 2; | |
503 | sign = get_bits1(gb); | |
504 | coeff = (coeff ^ -sign) + sign; | |
505 | } | |
506 | return coeff; | |
507 | } | |
508 | ||
509 | /** | |
510 | * Decode the coeffs in the rectangle defined by left, right, top, bottom | |
511 | * [DIRAC_STD] 13.4.3.2 Codeblock unpacking loop. codeblock() | |
512 | */ | |
513 | static inline void codeblock(DiracContext *s, SubBand *b, | |
514 | GetBitContext *gb, DiracArith *c, | |
515 | int left, int right, int top, int bottom, | |
516 | int blockcnt_one, int is_arith) | |
517 | { | |
518 | int x, y, zero_block; | |
519 | int qoffset, qfactor; | |
520 | IDWTELEM *buf; | |
521 | ||
522 | /* check for any coded coefficients in this codeblock */ | |
523 | if (!blockcnt_one) { | |
524 | if (is_arith) | |
525 | zero_block = dirac_get_arith_bit(c, CTX_ZERO_BLOCK); | |
526 | else | |
527 | zero_block = get_bits1(gb); | |
528 | ||
529 | if (zero_block) | |
530 | return; | |
531 | } | |
532 | ||
533 | if (s->codeblock_mode && !(s->old_delta_quant && blockcnt_one)) { | |
534 | int quant = b->quant; | |
535 | if (is_arith) | |
536 | quant += dirac_get_arith_int(c, CTX_DELTA_Q_F, CTX_DELTA_Q_DATA); | |
537 | else | |
538 | quant += dirac_get_se_golomb(gb); | |
539 | if (quant < 0) { | |
540 | av_log(s->avctx, AV_LOG_ERROR, "Invalid quant\n"); | |
541 | return; | |
542 | } | |
543 | b->quant = quant; | |
544 | } | |
545 | ||
546 | b->quant = FFMIN(b->quant, MAX_QUANT); | |
547 | ||
548 | qfactor = qscale_tab[b->quant]; | |
549 | /* TODO: context pointer? */ | |
550 | if (!s->num_refs) | |
551 | qoffset = qoffset_intra_tab[b->quant]; | |
552 | else | |
553 | qoffset = qoffset_inter_tab[b->quant]; | |
554 | ||
555 | buf = b->ibuf + top * b->stride; | |
556 | for (y = top; y < bottom; y++) { | |
557 | for (x = left; x < right; x++) { | |
558 | /* [DIRAC_STD] 13.4.4 Subband coefficients. coeff_unpack() */ | |
559 | if (is_arith) | |
560 | coeff_unpack_arith(c, qfactor, qoffset, b, buf+x, x, y); | |
561 | else | |
562 | buf[x] = coeff_unpack_golomb(gb, qfactor, qoffset); | |
563 | } | |
564 | buf += b->stride; | |
565 | } | |
566 | } | |
567 | ||
568 | /** | |
569 | * Dirac Specification -> | |
570 | * 13.3 intra_dc_prediction(band) | |
571 | */ | |
572 | static inline void intra_dc_prediction(SubBand *b) | |
573 | { | |
574 | IDWTELEM *buf = 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; | |
580 | ||
581 | for (y = 1; y < b->height; y++) { | |
582 | buf[0] += buf[-b->stride]; | |
583 | ||
584 | for (x = 1; x < b->width; x++) { | |
585 | int pred = buf[x - 1] + buf[x - b->stride] + buf[x - b->stride-1]; | |
586 | buf[x] += divide3(pred); | |
587 | } | |
588 | buf += b->stride; | |
589 | } | |
590 | } | |
591 | ||
592 | /** | |
593 | * Dirac Specification -> | |
594 | * 13.4.2 Non-skipped subbands. subband_coeffs() | |
595 | */ | |
596 | static av_always_inline void decode_subband_internal(DiracContext *s, SubBand *b, int is_arith) | |
597 | { | |
598 | int cb_x, cb_y, left, right, top, bottom; | |
599 | DiracArith c; | |
600 | GetBitContext gb; | |
601 | int cb_width = s->codeblock[b->level + (b->orientation != subband_ll)].width; | |
602 | int cb_height = s->codeblock[b->level + (b->orientation != subband_ll)].height; | |
603 | int blockcnt_one = (cb_width + cb_height) == 2; | |
604 | ||
605 | if (!b->length) | |
606 | return; | |
607 | ||
608 | init_get_bits8(&gb, b->coeff_data, b->length); | |
609 | ||
610 | if (is_arith) | |
611 | ff_dirac_init_arith_decoder(&c, &gb, b->length); | |
612 | ||
613 | top = 0; | |
614 | for (cb_y = 0; cb_y < cb_height; cb_y++) { | |
615 | bottom = (b->height * (cb_y+1LL)) / cb_height; | |
616 | left = 0; | |
617 | for (cb_x = 0; cb_x < cb_width; cb_x++) { | |
618 | right = (b->width * (cb_x+1LL)) / cb_width; | |
619 | codeblock(s, b, &gb, &c, left, right, top, bottom, blockcnt_one, is_arith); | |
620 | left = right; | |
621 | } | |
622 | top = bottom; | |
623 | } | |
624 | ||
625 | if (b->orientation == subband_ll && s->num_refs == 0) | |
626 | intra_dc_prediction(b); | |
627 | } | |
628 | ||
629 | static int decode_subband_arith(AVCodecContext *avctx, void *b) | |
630 | { | |
631 | DiracContext *s = avctx->priv_data; | |
632 | decode_subband_internal(s, b, 1); | |
633 | return 0; | |
634 | } | |
635 | ||
636 | static int decode_subband_golomb(AVCodecContext *avctx, void *arg) | |
637 | { | |
638 | DiracContext *s = avctx->priv_data; | |
639 | SubBand **b = arg; | |
640 | decode_subband_internal(s, *b, 0); | |
641 | return 0; | |
642 | } | |
643 | ||
644 | /** | |
645 | * Dirac Specification -> | |
646 | * [DIRAC_STD] 13.4.1 core_transform_data() | |
647 | */ | |
648 | static void decode_component(DiracContext *s, int comp) | |
649 | { | |
650 | AVCodecContext *avctx = s->avctx; | |
651 | SubBand *bands[3*MAX_DWT_LEVELS+1]; | |
652 | enum dirac_subband orientation; | |
653 | int level, num_bands = 0; | |
654 | ||
655 | /* Unpack all subbands at all levels. */ | |
656 | for (level = 0; level < s->wavelet_depth; level++) { | |
657 | for (orientation = !!level; orientation < 4; orientation++) { | |
658 | SubBand *b = &s->plane[comp].band[level][orientation]; | |
659 | bands[num_bands++] = b; | |
660 | ||
661 | align_get_bits(&s->gb); | |
662 | /* [DIRAC_STD] 13.4.2 subband() */ | |
663 | b->length = svq3_get_ue_golomb(&s->gb); | |
664 | if (b->length) { | |
665 | b->quant = svq3_get_ue_golomb(&s->gb); | |
666 | align_get_bits(&s->gb); | |
667 | b->coeff_data = s->gb.buffer + get_bits_count(&s->gb)/8; | |
668 | b->length = FFMIN(b->length, FFMAX(get_bits_left(&s->gb)/8, 0)); | |
669 | skip_bits_long(&s->gb, b->length*8); | |
670 | } | |
671 | } | |
672 | /* arithmetic coding has inter-level dependencies, so we can only execute one level at a time */ | |
673 | if (s->is_arith) | |
674 | avctx->execute(avctx, decode_subband_arith, &s->plane[comp].band[level][!!level], | |
675 | NULL, 4-!!level, sizeof(SubBand)); | |
676 | } | |
677 | /* golomb coding has no inter-level dependencies, so we can execute all subbands in parallel */ | |
678 | if (!s->is_arith) | |
679 | avctx->execute(avctx, decode_subband_golomb, bands, NULL, num_bands, sizeof(SubBand*)); | |
680 | } | |
681 | ||
682 | /* [DIRAC_STD] 13.5.5.2 Luma slice subband data. luma_slice_band(level,orient,sx,sy) --> if b2 == NULL */ | |
683 | /* [DIRAC_STD] 13.5.5.3 Chroma slice subband data. chroma_slice_band(level,orient,sx,sy) --> if b2 != NULL */ | |
684 | static void lowdelay_subband(DiracContext *s, GetBitContext *gb, int quant, | |
685 | int slice_x, int slice_y, int bits_end, | |
686 | SubBand *b1, SubBand *b2) | |
687 | { | |
688 | int left = b1->width * slice_x / s->lowdelay.num_x; | |
689 | int right = b1->width *(slice_x+1) / s->lowdelay.num_x; | |
690 | int top = b1->height * slice_y / s->lowdelay.num_y; | |
691 | int bottom = b1->height *(slice_y+1) / s->lowdelay.num_y; | |
692 | ||
693 | int qfactor = qscale_tab[FFMIN(quant, MAX_QUANT)]; | |
694 | int qoffset = qoffset_intra_tab[FFMIN(quant, MAX_QUANT)]; | |
695 | ||
696 | IDWTELEM *buf1 = b1->ibuf + top * b1->stride; | |
697 | IDWTELEM *buf2 = b2 ? b2->ibuf + top * b2->stride : NULL; | |
698 | int x, y; | |
699 | /* we have to constantly check for overread since the spec explicitly | |
700 | requires this, with the meaning that all remaining coeffs are set to 0 */ | |
701 | if (get_bits_count(gb) >= bits_end) | |
702 | return; | |
703 | ||
704 | for (y = top; y < bottom; y++) { | |
705 | for (x = left; x < right; x++) { | |
706 | buf1[x] = coeff_unpack_golomb(gb, qfactor, qoffset); | |
707 | if (get_bits_count(gb) >= bits_end) | |
708 | return; | |
709 | if (buf2) { | |
710 | buf2[x] = coeff_unpack_golomb(gb, qfactor, qoffset); | |
711 | if (get_bits_count(gb) >= bits_end) | |
712 | return; | |
713 | } | |
714 | } | |
715 | buf1 += b1->stride; | |
716 | if (buf2) | |
717 | buf2 += b2->stride; | |
718 | } | |
719 | } | |
720 | ||
721 | struct lowdelay_slice { | |
722 | GetBitContext gb; | |
723 | int slice_x; | |
724 | int slice_y; | |
725 | int bytes; | |
726 | }; | |
727 | ||
728 | ||
729 | /** | |
730 | * Dirac Specification -> | |
731 | * 13.5.2 Slices. slice(sx,sy) | |
732 | */ | |
733 | static int decode_lowdelay_slice(AVCodecContext *avctx, void *arg) | |
734 | { | |
735 | DiracContext *s = avctx->priv_data; | |
736 | struct lowdelay_slice *slice = arg; | |
737 | GetBitContext *gb = &slice->gb; | |
738 | enum dirac_subband orientation; | |
739 | int level, quant, chroma_bits, chroma_end; | |
740 | ||
741 | int quant_base = get_bits(gb, 7); /*[DIRAC_STD] qindex */ | |
742 | int length_bits = av_log2(8 * slice->bytes)+1; | |
743 | int luma_bits = get_bits_long(gb, length_bits); | |
744 | int luma_end = get_bits_count(gb) + FFMIN(luma_bits, get_bits_left(gb)); | |
745 | ||
746 | /* [DIRAC_STD] 13.5.5.2 luma_slice_band */ | |
747 | for (level = 0; level < s->wavelet_depth; level++) | |
748 | for (orientation = !!level; orientation < 4; orientation++) { | |
749 | quant = FFMAX(quant_base - s->lowdelay.quant[level][orientation], 0); | |
750 | lowdelay_subband(s, gb, quant, slice->slice_x, slice->slice_y, luma_end, | |
751 | &s->plane[0].band[level][orientation], NULL); | |
752 | } | |
753 | ||
754 | /* consume any unused bits from luma */ | |
755 | skip_bits_long(gb, get_bits_count(gb) - luma_end); | |
756 | ||
757 | chroma_bits = 8*slice->bytes - 7 - length_bits - luma_bits; | |
758 | chroma_end = get_bits_count(gb) + FFMIN(chroma_bits, get_bits_left(gb)); | |
759 | /* [DIRAC_STD] 13.5.5.3 chroma_slice_band */ | |
760 | for (level = 0; level < s->wavelet_depth; level++) | |
761 | for (orientation = !!level; orientation < 4; orientation++) { | |
762 | quant = FFMAX(quant_base - s->lowdelay.quant[level][orientation], 0); | |
763 | lowdelay_subband(s, gb, quant, slice->slice_x, slice->slice_y, chroma_end, | |
764 | &s->plane[1].band[level][orientation], | |
765 | &s->plane[2].band[level][orientation]); | |
766 | } | |
767 | ||
768 | return 0; | |
769 | } | |
770 | ||
771 | /** | |
772 | * Dirac Specification -> | |
773 | * 13.5.1 low_delay_transform_data() | |
774 | */ | |
775 | static void decode_lowdelay(DiracContext *s) | |
776 | { | |
777 | AVCodecContext *avctx = s->avctx; | |
778 | int slice_x, slice_y, bytes, bufsize; | |
779 | const uint8_t *buf; | |
780 | struct lowdelay_slice *slices; | |
781 | int slice_num = 0; | |
782 | ||
783 | slices = av_mallocz_array(s->lowdelay.num_x, s->lowdelay.num_y * sizeof(struct lowdelay_slice)); | |
784 | ||
785 | align_get_bits(&s->gb); | |
786 | /*[DIRAC_STD] 13.5.2 Slices. slice(sx,sy) */ | |
787 | buf = s->gb.buffer + get_bits_count(&s->gb)/8; | |
788 | bufsize = get_bits_left(&s->gb); | |
789 | ||
790 | for (slice_y = 0; bufsize > 0 && slice_y < s->lowdelay.num_y; slice_y++) | |
791 | for (slice_x = 0; bufsize > 0 && slice_x < s->lowdelay.num_x; slice_x++) { | |
792 | bytes = (slice_num+1) * s->lowdelay.bytes.num / s->lowdelay.bytes.den | |
793 | - slice_num * s->lowdelay.bytes.num / s->lowdelay.bytes.den; | |
794 | ||
795 | slices[slice_num].bytes = bytes; | |
796 | slices[slice_num].slice_x = slice_x; | |
797 | slices[slice_num].slice_y = slice_y; | |
798 | init_get_bits(&slices[slice_num].gb, buf, bufsize); | |
799 | slice_num++; | |
800 | ||
801 | buf += bytes; | |
802 | bufsize -= bytes*8; | |
803 | } | |
804 | ||
805 | avctx->execute(avctx, decode_lowdelay_slice, slices, NULL, slice_num, | |
806 | sizeof(struct lowdelay_slice)); /* [DIRAC_STD] 13.5.2 Slices */ | |
807 | intra_dc_prediction(&s->plane[0].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */ | |
808 | intra_dc_prediction(&s->plane[1].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */ | |
809 | intra_dc_prediction(&s->plane[2].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */ | |
810 | av_free(slices); | |
811 | } | |
812 | ||
813 | static void init_planes(DiracContext *s) | |
814 | { | |
815 | int i, w, h, level, orientation; | |
816 | ||
817 | for (i = 0; i < 3; i++) { | |
818 | Plane *p = &s->plane[i]; | |
819 | ||
820 | p->width = s->source.width >> (i ? s->chroma_x_shift : 0); | |
821 | p->height = s->source.height >> (i ? s->chroma_y_shift : 0); | |
822 | p->idwt_width = w = CALC_PADDING(p->width , s->wavelet_depth); | |
823 | p->idwt_height = h = CALC_PADDING(p->height, s->wavelet_depth); | |
824 | p->idwt_stride = FFALIGN(p->idwt_width, 8); | |
825 | ||
826 | for (level = s->wavelet_depth-1; level >= 0; level--) { | |
827 | w = w>>1; | |
828 | h = h>>1; | |
829 | for (orientation = !!level; orientation < 4; orientation++) { | |
830 | SubBand *b = &p->band[level][orientation]; | |
831 | ||
832 | b->ibuf = p->idwt_buf; | |
833 | b->level = level; | |
834 | b->stride = p->idwt_stride << (s->wavelet_depth - level); | |
835 | b->width = w; | |
836 | b->height = h; | |
837 | b->orientation = orientation; | |
838 | ||
839 | if (orientation & 1) | |
840 | b->ibuf += w; | |
841 | if (orientation > 1) | |
842 | b->ibuf += b->stride>>1; | |
843 | ||
844 | if (level) | |
845 | b->parent = &p->band[level-1][orientation]; | |
846 | } | |
847 | } | |
848 | ||
849 | if (i > 0) { | |
850 | p->xblen = s->plane[0].xblen >> s->chroma_x_shift; | |
851 | p->yblen = s->plane[0].yblen >> s->chroma_y_shift; | |
852 | p->xbsep = s->plane[0].xbsep >> s->chroma_x_shift; | |
853 | p->ybsep = s->plane[0].ybsep >> s->chroma_y_shift; | |
854 | } | |
855 | ||
856 | p->xoffset = (p->xblen - p->xbsep)/2; | |
857 | p->yoffset = (p->yblen - p->ybsep)/2; | |
858 | } | |
859 | } | |
860 | ||
861 | /** | |
862 | * Unpack the motion compensation parameters | |
863 | * Dirac Specification -> | |
864 | * 11.2 Picture prediction data. picture_prediction() | |
865 | */ | |
866 | static int dirac_unpack_prediction_parameters(DiracContext *s) | |
867 | { | |
868 | static const uint8_t default_blen[] = { 4, 12, 16, 24 }; | |
869 | static const uint8_t default_bsep[] = { 4, 8, 12, 16 }; | |
870 | ||
871 | GetBitContext *gb = &s->gb; | |
872 | unsigned idx, ref; | |
873 | ||
874 | align_get_bits(gb); | |
875 | /* [DIRAC_STD] 11.2.2 Block parameters. block_parameters() */ | |
876 | /* Luma and Chroma are equal. 11.2.3 */ | |
877 | idx = svq3_get_ue_golomb(gb); /* [DIRAC_STD] index */ | |
878 | ||
879 | if (idx > 4) { | |
880 | av_log(s->avctx, AV_LOG_ERROR, "Block prediction index too high\n"); | |
881 | return -1; | |
882 | } | |
883 | ||
884 | if (idx == 0) { | |
885 | s->plane[0].xblen = svq3_get_ue_golomb(gb); | |
886 | s->plane[0].yblen = svq3_get_ue_golomb(gb); | |
887 | s->plane[0].xbsep = svq3_get_ue_golomb(gb); | |
888 | s->plane[0].ybsep = svq3_get_ue_golomb(gb); | |
889 | } else { | |
890 | /*[DIRAC_STD] preset_block_params(index). Table 11.1 */ | |
891 | s->plane[0].xblen = default_blen[idx-1]; | |
892 | s->plane[0].yblen = default_blen[idx-1]; | |
893 | s->plane[0].xbsep = default_bsep[idx-1]; | |
894 | s->plane[0].ybsep = default_bsep[idx-1]; | |
895 | } | |
896 | /*[DIRAC_STD] 11.2.4 motion_data_dimensions() | |
897 | Calculated in function dirac_unpack_block_motion_data */ | |
898 | ||
899 | 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) { | |
900 | av_log(s->avctx, AV_LOG_ERROR, "Block separation too small\n"); | |
901 | return -1; | |
902 | } | |
903 | if (s->plane[0].xbsep > s->plane[0].xblen || s->plane[0].ybsep > s->plane[0].yblen) { | |
904 | av_log(s->avctx, AV_LOG_ERROR, "Block separation greater than size\n"); | |
905 | return -1; | |
906 | } | |
907 | if (FFMAX(s->plane[0].xblen, s->plane[0].yblen) > MAX_BLOCKSIZE) { | |
908 | av_log(s->avctx, AV_LOG_ERROR, "Unsupported large block size\n"); | |
909 | return -1; | |
910 | } | |
911 | ||
912 | /*[DIRAC_STD] 11.2.5 Motion vector precision. motion_vector_precision() | |
913 | Read motion vector precision */ | |
914 | s->mv_precision = svq3_get_ue_golomb(gb); | |
915 | if (s->mv_precision > 3) { | |
916 | av_log(s->avctx, AV_LOG_ERROR, "MV precision finer than eighth-pel\n"); | |
917 | return -1; | |
918 | } | |
919 | ||
920 | /*[DIRAC_STD] 11.2.6 Global motion. global_motion() | |
921 | Read the global motion compensation parameters */ | |
922 | s->globalmc_flag = get_bits1(gb); | |
923 | if (s->globalmc_flag) { | |
924 | memset(s->globalmc, 0, sizeof(s->globalmc)); | |
925 | /* [DIRAC_STD] pan_tilt(gparams) */ | |
926 | for (ref = 0; ref < s->num_refs; ref++) { | |
927 | if (get_bits1(gb)) { | |
928 | s->globalmc[ref].pan_tilt[0] = dirac_get_se_golomb(gb); | |
929 | s->globalmc[ref].pan_tilt[1] = dirac_get_se_golomb(gb); | |
930 | } | |
931 | /* [DIRAC_STD] zoom_rotate_shear(gparams) | |
932 | zoom/rotation/shear parameters */ | |
933 | if (get_bits1(gb)) { | |
934 | s->globalmc[ref].zrs_exp = svq3_get_ue_golomb(gb); | |
935 | s->globalmc[ref].zrs[0][0] = dirac_get_se_golomb(gb); | |
936 | s->globalmc[ref].zrs[0][1] = dirac_get_se_golomb(gb); | |
937 | s->globalmc[ref].zrs[1][0] = dirac_get_se_golomb(gb); | |
938 | s->globalmc[ref].zrs[1][1] = dirac_get_se_golomb(gb); | |
939 | } else { | |
940 | s->globalmc[ref].zrs[0][0] = 1; | |
941 | s->globalmc[ref].zrs[1][1] = 1; | |
942 | } | |
943 | /* [DIRAC_STD] perspective(gparams) */ | |
944 | if (get_bits1(gb)) { | |
945 | s->globalmc[ref].perspective_exp = svq3_get_ue_golomb(gb); | |
946 | s->globalmc[ref].perspective[0] = dirac_get_se_golomb(gb); | |
947 | s->globalmc[ref].perspective[1] = dirac_get_se_golomb(gb); | |
948 | } | |
949 | } | |
950 | } | |
951 | ||
952 | /*[DIRAC_STD] 11.2.7 Picture prediction mode. prediction_mode() | |
953 | Picture prediction mode, not currently used. */ | |
954 | if (svq3_get_ue_golomb(gb)) { | |
955 | av_log(s->avctx, AV_LOG_ERROR, "Unknown picture prediction mode\n"); | |
956 | return -1; | |
957 | } | |
958 | ||
959 | /* [DIRAC_STD] 11.2.8 Reference picture weight. reference_picture_weights() | |
960 | just data read, weight calculation will be done later on. */ | |
961 | s->weight_log2denom = 1; | |
962 | s->weight[0] = 1; | |
963 | s->weight[1] = 1; | |
964 | ||
965 | if (get_bits1(gb)) { | |
966 | s->weight_log2denom = svq3_get_ue_golomb(gb); | |
967 | s->weight[0] = dirac_get_se_golomb(gb); | |
968 | if (s->num_refs == 2) | |
969 | s->weight[1] = dirac_get_se_golomb(gb); | |
970 | } | |
971 | return 0; | |
972 | } | |
973 | ||
974 | /** | |
975 | * Dirac Specification -> | |
976 | * 11.3 Wavelet transform data. wavelet_transform() | |
977 | */ | |
978 | static int dirac_unpack_idwt_params(DiracContext *s) | |
979 | { | |
980 | GetBitContext *gb = &s->gb; | |
981 | int i, level; | |
982 | unsigned tmp; | |
983 | ||
984 | #define CHECKEDREAD(dst, cond, errmsg) \ | |
985 | tmp = svq3_get_ue_golomb(gb); \ | |
986 | if (cond) { \ | |
987 | av_log(s->avctx, AV_LOG_ERROR, errmsg); \ | |
988 | return -1; \ | |
989 | }\ | |
990 | dst = tmp; | |
991 | ||
992 | align_get_bits(gb); | |
993 | ||
994 | s->zero_res = s->num_refs ? get_bits1(gb) : 0; | |
995 | if (s->zero_res) | |
996 | return 0; | |
997 | ||
998 | /*[DIRAC_STD] 11.3.1 Transform parameters. transform_parameters() */ | |
999 | CHECKEDREAD(s->wavelet_idx, tmp > 6, "wavelet_idx is too big\n") | |
1000 | ||
1001 | CHECKEDREAD(s->wavelet_depth, tmp > MAX_DWT_LEVELS || tmp < 1, "invalid number of DWT decompositions\n") | |
1002 | ||
1003 | if (!s->low_delay) { | |
1004 | /* Codeblock parameters (core syntax only) */ | |
1005 | if (get_bits1(gb)) { | |
1006 | for (i = 0; i <= s->wavelet_depth; i++) { | |
1007 | CHECKEDREAD(s->codeblock[i].width , tmp < 1 || tmp > (s->avctx->width >>s->wavelet_depth-i), "codeblock width invalid\n") | |
1008 | CHECKEDREAD(s->codeblock[i].height, tmp < 1 || tmp > (s->avctx->height>>s->wavelet_depth-i), "codeblock height invalid\n") | |
1009 | } | |
1010 | ||
1011 | CHECKEDREAD(s->codeblock_mode, tmp > 1, "unknown codeblock mode\n") | |
1012 | } else | |
1013 | for (i = 0; i <= s->wavelet_depth; i++) | |
1014 | s->codeblock[i].width = s->codeblock[i].height = 1; | |
1015 | } else { | |
1016 | /* Slice parameters + quantization matrix*/ | |
1017 | /*[DIRAC_STD] 11.3.4 Slice coding Parameters (low delay syntax only). slice_parameters() */ | |
1018 | s->lowdelay.num_x = svq3_get_ue_golomb(gb); | |
1019 | s->lowdelay.num_y = svq3_get_ue_golomb(gb); | |
1020 | s->lowdelay.bytes.num = svq3_get_ue_golomb(gb); | |
1021 | s->lowdelay.bytes.den = svq3_get_ue_golomb(gb); | |
1022 | ||
1023 | if (s->lowdelay.bytes.den <= 0) { | |
1024 | av_log(s->avctx,AV_LOG_ERROR,"Invalid lowdelay.bytes.den\n"); | |
1025 | return AVERROR_INVALIDDATA; | |
1026 | } | |
1027 | ||
1028 | /* [DIRAC_STD] 11.3.5 Quantisation matrices (low-delay syntax). quant_matrix() */ | |
1029 | if (get_bits1(gb)) { | |
1030 | av_log(s->avctx,AV_LOG_DEBUG,"Low Delay: Has Custom Quantization Matrix!\n"); | |
1031 | /* custom quantization matrix */ | |
1032 | s->lowdelay.quant[0][0] = svq3_get_ue_golomb(gb); | |
1033 | for (level = 0; level < s->wavelet_depth; level++) { | |
1034 | s->lowdelay.quant[level][1] = svq3_get_ue_golomb(gb); | |
1035 | s->lowdelay.quant[level][2] = svq3_get_ue_golomb(gb); | |
1036 | s->lowdelay.quant[level][3] = svq3_get_ue_golomb(gb); | |
1037 | } | |
1038 | } else { | |
1039 | if (s->wavelet_depth > 4) { | |
1040 | av_log(s->avctx,AV_LOG_ERROR,"Mandatory custom low delay matrix missing for depth %d\n", s->wavelet_depth); | |
1041 | return AVERROR_INVALIDDATA; | |
1042 | } | |
1043 | /* default quantization matrix */ | |
1044 | for (level = 0; level < s->wavelet_depth; level++) | |
1045 | for (i = 0; i < 4; i++) { | |
1046 | s->lowdelay.quant[level][i] = default_qmat[s->wavelet_idx][level][i]; | |
1047 | /* haar with no shift differs for different depths */ | |
1048 | if (s->wavelet_idx == 3) | |
1049 | s->lowdelay.quant[level][i] += 4*(s->wavelet_depth-1 - level); | |
1050 | } | |
1051 | } | |
1052 | } | |
1053 | return 0; | |
1054 | } | |
1055 | ||
1056 | static inline int pred_sbsplit(uint8_t *sbsplit, int stride, int x, int y) | |
1057 | { | |
1058 | static const uint8_t avgsplit[7] = { 0, 0, 1, 1, 1, 2, 2 }; | |
1059 | ||
1060 | if (!(x|y)) | |
1061 | return 0; | |
1062 | else if (!y) | |
1063 | return sbsplit[-1]; | |
1064 | else if (!x) | |
1065 | return sbsplit[-stride]; | |
1066 | ||
1067 | return avgsplit[sbsplit[-1] + sbsplit[-stride] + sbsplit[-stride-1]]; | |
1068 | } | |
1069 | ||
1070 | static inline int pred_block_mode(DiracBlock *block, int stride, int x, int y, int refmask) | |
1071 | { | |
1072 | int pred; | |
1073 | ||
1074 | if (!(x|y)) | |
1075 | return 0; | |
1076 | else if (!y) | |
1077 | return block[-1].ref & refmask; | |
1078 | else if (!x) | |
1079 | return block[-stride].ref & refmask; | |
1080 | ||
1081 | /* return the majority */ | |
1082 | pred = (block[-1].ref & refmask) + (block[-stride].ref & refmask) + (block[-stride-1].ref & refmask); | |
1083 | return (pred >> 1) & refmask; | |
1084 | } | |
1085 | ||
1086 | static inline void pred_block_dc(DiracBlock *block, int stride, int x, int y) | |
1087 | { | |
1088 | int i, n = 0; | |
1089 | ||
1090 | memset(block->u.dc, 0, sizeof(block->u.dc)); | |
1091 | ||
1092 | if (x && !(block[-1].ref & 3)) { | |
1093 | for (i = 0; i < 3; i++) | |
1094 | block->u.dc[i] += block[-1].u.dc[i]; | |
1095 | n++; | |
1096 | } | |
1097 | ||
1098 | if (y && !(block[-stride].ref & 3)) { | |
1099 | for (i = 0; i < 3; i++) | |
1100 | block->u.dc[i] += block[-stride].u.dc[i]; | |
1101 | n++; | |
1102 | } | |
1103 | ||
1104 | if (x && y && !(block[-1-stride].ref & 3)) { | |
1105 | for (i = 0; i < 3; i++) | |
1106 | block->u.dc[i] += block[-1-stride].u.dc[i]; | |
1107 | n++; | |
1108 | } | |
1109 | ||
1110 | if (n == 2) { | |
1111 | for (i = 0; i < 3; i++) | |
1112 | block->u.dc[i] = (block->u.dc[i]+1)>>1; | |
1113 | } else if (n == 3) { | |
1114 | for (i = 0; i < 3; i++) | |
1115 | block->u.dc[i] = divide3(block->u.dc[i]); | |
1116 | } | |
1117 | } | |
1118 | ||
1119 | static inline void pred_mv(DiracBlock *block, int stride, int x, int y, int ref) | |
1120 | { | |
1121 | int16_t *pred[3]; | |
1122 | int refmask = ref+1; | |
1123 | int mask = refmask | DIRAC_REF_MASK_GLOBAL; /* exclude gmc blocks */ | |
1124 | int n = 0; | |
1125 | ||
1126 | if (x && (block[-1].ref & mask) == refmask) | |
1127 | pred[n++] = block[-1].u.mv[ref]; | |
1128 | ||
1129 | if (y && (block[-stride].ref & mask) == refmask) | |
1130 | pred[n++] = block[-stride].u.mv[ref]; | |
1131 | ||
1132 | if (x && y && (block[-stride-1].ref & mask) == refmask) | |
1133 | pred[n++] = block[-stride-1].u.mv[ref]; | |
1134 | ||
1135 | switch (n) { | |
1136 | case 0: | |
1137 | block->u.mv[ref][0] = 0; | |
1138 | block->u.mv[ref][1] = 0; | |
1139 | break; | |
1140 | case 1: | |
1141 | block->u.mv[ref][0] = pred[0][0]; | |
1142 | block->u.mv[ref][1] = pred[0][1]; | |
1143 | break; | |
1144 | case 2: | |
1145 | block->u.mv[ref][0] = (pred[0][0] + pred[1][0] + 1) >> 1; | |
1146 | block->u.mv[ref][1] = (pred[0][1] + pred[1][1] + 1) >> 1; | |
1147 | break; | |
1148 | case 3: | |
1149 | block->u.mv[ref][0] = mid_pred(pred[0][0], pred[1][0], pred[2][0]); | |
1150 | block->u.mv[ref][1] = mid_pred(pred[0][1], pred[1][1], pred[2][1]); | |
1151 | break; | |
1152 | } | |
1153 | } | |
1154 | ||
1155 | static void global_mv(DiracContext *s, DiracBlock *block, int x, int y, int ref) | |
1156 | { | |
1157 | int ez = s->globalmc[ref].zrs_exp; | |
1158 | int ep = s->globalmc[ref].perspective_exp; | |
1159 | int (*A)[2] = s->globalmc[ref].zrs; | |
1160 | int *b = s->globalmc[ref].pan_tilt; | |
1161 | int *c = s->globalmc[ref].perspective; | |
1162 | ||
1163 | int m = (1<<ep) - (c[0]*x + c[1]*y); | |
1164 | int mx = m * ((A[0][0] * x + A[0][1]*y) + (1<<ez) * b[0]); | |
1165 | int my = m * ((A[1][0] * x + A[1][1]*y) + (1<<ez) * b[1]); | |
1166 | ||
1167 | block->u.mv[ref][0] = (mx + (1<<(ez+ep))) >> (ez+ep); | |
1168 | block->u.mv[ref][1] = (my + (1<<(ez+ep))) >> (ez+ep); | |
1169 | } | |
1170 | ||
1171 | static void decode_block_params(DiracContext *s, DiracArith arith[8], DiracBlock *block, | |
1172 | int stride, int x, int y) | |
1173 | { | |
1174 | int i; | |
1175 | ||
1176 | block->ref = pred_block_mode(block, stride, x, y, DIRAC_REF_MASK_REF1); | |
1177 | block->ref ^= dirac_get_arith_bit(arith, CTX_PMODE_REF1); | |
1178 | ||
1179 | if (s->num_refs == 2) { | |
1180 | block->ref |= pred_block_mode(block, stride, x, y, DIRAC_REF_MASK_REF2); | |
1181 | block->ref ^= dirac_get_arith_bit(arith, CTX_PMODE_REF2) << 1; | |
1182 | } | |
1183 | ||
1184 | if (!block->ref) { | |
1185 | pred_block_dc(block, stride, x, y); | |
1186 | for (i = 0; i < 3; i++) | |
1187 | block->u.dc[i] += dirac_get_arith_int(arith+1+i, CTX_DC_F1, CTX_DC_DATA); | |
1188 | return; | |
1189 | } | |
1190 | ||
1191 | if (s->globalmc_flag) { | |
1192 | block->ref |= pred_block_mode(block, stride, x, y, DIRAC_REF_MASK_GLOBAL); | |
1193 | block->ref ^= dirac_get_arith_bit(arith, CTX_GLOBAL_BLOCK) << 2; | |
1194 | } | |
1195 | ||
1196 | for (i = 0; i < s->num_refs; i++) | |
1197 | if (block->ref & (i+1)) { | |
1198 | if (block->ref & DIRAC_REF_MASK_GLOBAL) { | |
1199 | global_mv(s, block, x, y, i); | |
1200 | } else { | |
1201 | pred_mv(block, stride, x, y, i); | |
1202 | block->u.mv[i][0] += dirac_get_arith_int(arith + 4 + 2 * i, CTX_MV_F1, CTX_MV_DATA); | |
1203 | block->u.mv[i][1] += dirac_get_arith_int(arith + 5 + 2 * i, CTX_MV_F1, CTX_MV_DATA); | |
1204 | } | |
1205 | } | |
1206 | } | |
1207 | ||
1208 | /** | |
1209 | * Copies the current block to the other blocks covered by the current superblock split mode | |
1210 | */ | |
1211 | static void propagate_block_data(DiracBlock *block, int stride, int size) | |
1212 | { | |
1213 | int x, y; | |
1214 | DiracBlock *dst = block; | |
1215 | ||
1216 | for (x = 1; x < size; x++) | |
1217 | dst[x] = *block; | |
1218 | ||
1219 | for (y = 1; y < size; y++) { | |
1220 | dst += stride; | |
1221 | for (x = 0; x < size; x++) | |
1222 | dst[x] = *block; | |
1223 | } | |
1224 | } | |
1225 | ||
1226 | /** | |
1227 | * Dirac Specification -> | |
1228 | * 12. Block motion data syntax | |
1229 | */ | |
1230 | static int dirac_unpack_block_motion_data(DiracContext *s) | |
1231 | { | |
1232 | GetBitContext *gb = &s->gb; | |
1233 | uint8_t *sbsplit = s->sbsplit; | |
1234 | int i, x, y, q, p; | |
1235 | DiracArith arith[8]; | |
1236 | ||
1237 | align_get_bits(gb); | |
1238 | ||
1239 | /* [DIRAC_STD] 11.2.4 and 12.2.1 Number of blocks and superblocks */ | |
1240 | s->sbwidth = DIVRNDUP(s->source.width, 4*s->plane[0].xbsep); | |
1241 | s->sbheight = DIVRNDUP(s->source.height, 4*s->plane[0].ybsep); | |
1242 | s->blwidth = 4 * s->sbwidth; | |
1243 | s->blheight = 4 * s->sbheight; | |
1244 | ||
1245 | /* [DIRAC_STD] 12.3.1 Superblock splitting modes. superblock_split_modes() | |
1246 | decode superblock split modes */ | |
1247 | ff_dirac_init_arith_decoder(arith, gb, svq3_get_ue_golomb(gb)); /* svq3_get_ue_golomb(gb) is the length */ | |
1248 | for (y = 0; y < s->sbheight; y++) { | |
1249 | for (x = 0; x < s->sbwidth; x++) { | |
1250 | unsigned int split = dirac_get_arith_uint(arith, CTX_SB_F1, CTX_SB_DATA); | |
1251 | if (split > 2) | |
1252 | return -1; | |
1253 | sbsplit[x] = (split + pred_sbsplit(sbsplit+x, s->sbwidth, x, y)) % 3; | |
1254 | } | |
1255 | sbsplit += s->sbwidth; | |
1256 | } | |
1257 | ||
1258 | /* setup arith decoding */ | |
1259 | ff_dirac_init_arith_decoder(arith, gb, svq3_get_ue_golomb(gb)); | |
1260 | for (i = 0; i < s->num_refs; i++) { | |
1261 | ff_dirac_init_arith_decoder(arith + 4 + 2 * i, gb, svq3_get_ue_golomb(gb)); | |
1262 | ff_dirac_init_arith_decoder(arith + 5 + 2 * i, gb, svq3_get_ue_golomb(gb)); | |
1263 | } | |
1264 | for (i = 0; i < 3; i++) | |
1265 | ff_dirac_init_arith_decoder(arith+1+i, gb, svq3_get_ue_golomb(gb)); | |
1266 | ||
1267 | for (y = 0; y < s->sbheight; y++) | |
1268 | for (x = 0; x < s->sbwidth; x++) { | |
1269 | int blkcnt = 1 << s->sbsplit[y * s->sbwidth + x]; | |
1270 | int step = 4 >> s->sbsplit[y * s->sbwidth + x]; | |
1271 | ||
1272 | for (q = 0; q < blkcnt; q++) | |
1273 | for (p = 0; p < blkcnt; p++) { | |
1274 | int bx = 4 * x + p*step; | |
1275 | int by = 4 * y + q*step; | |
1276 | DiracBlock *block = &s->blmotion[by*s->blwidth + bx]; | |
1277 | decode_block_params(s, arith, block, s->blwidth, bx, by); | |
1278 | propagate_block_data(block, s->blwidth, step); | |
1279 | } | |
1280 | } | |
1281 | ||
1282 | return 0; | |
1283 | } | |
1284 | ||
1285 | static int weight(int i, int blen, int offset) | |
1286 | { | |
1287 | #define ROLLOFF(i) offset == 1 ? ((i) ? 5 : 3) : \ | |
1288 | (1 + (6*(i) + offset - 1) / (2*offset - 1)) | |
1289 | ||
1290 | if (i < 2*offset) | |
1291 | return ROLLOFF(i); | |
1292 | else if (i > blen-1 - 2*offset) | |
1293 | return ROLLOFF(blen-1 - i); | |
1294 | return 8; | |
1295 | } | |
1296 | ||
1297 | static void init_obmc_weight_row(Plane *p, uint8_t *obmc_weight, int stride, | |
1298 | int left, int right, int wy) | |
1299 | { | |
1300 | int x; | |
1301 | for (x = 0; left && x < p->xblen >> 1; x++) | |
1302 | obmc_weight[x] = wy*8; | |
1303 | for (; x < p->xblen >> right; x++) | |
1304 | obmc_weight[x] = wy*weight(x, p->xblen, p->xoffset); | |
1305 | for (; x < p->xblen; x++) | |
1306 | obmc_weight[x] = wy*8; | |
1307 | for (; x < stride; x++) | |
1308 | obmc_weight[x] = 0; | |
1309 | } | |
1310 | ||
1311 | static void init_obmc_weight(Plane *p, uint8_t *obmc_weight, int stride, | |
1312 | int left, int right, int top, int bottom) | |
1313 | { | |
1314 | int y; | |
1315 | for (y = 0; top && y < p->yblen >> 1; y++) { | |
1316 | init_obmc_weight_row(p, obmc_weight, stride, left, right, 8); | |
1317 | obmc_weight += stride; | |
1318 | } | |
1319 | for (; y < p->yblen >> bottom; y++) { | |
1320 | int wy = weight(y, p->yblen, p->yoffset); | |
1321 | init_obmc_weight_row(p, obmc_weight, stride, left, right, wy); | |
1322 | obmc_weight += stride; | |
1323 | } | |
1324 | for (; y < p->yblen; y++) { | |
1325 | init_obmc_weight_row(p, obmc_weight, stride, left, right, 8); | |
1326 | obmc_weight += stride; | |
1327 | } | |
1328 | } | |
1329 | ||
1330 | static void init_obmc_weights(DiracContext *s, Plane *p, int by) | |
1331 | { | |
1332 | int top = !by; | |
1333 | int bottom = by == s->blheight-1; | |
1334 | ||
1335 | /* don't bother re-initing for rows 2 to blheight-2, the weights don't change */ | |
1336 | if (top || bottom || by == 1) { | |
1337 | init_obmc_weight(p, s->obmc_weight[0], MAX_BLOCKSIZE, 1, 0, top, bottom); | |
1338 | init_obmc_weight(p, s->obmc_weight[1], MAX_BLOCKSIZE, 0, 0, top, bottom); | |
1339 | init_obmc_weight(p, s->obmc_weight[2], MAX_BLOCKSIZE, 0, 1, top, bottom); | |
1340 | } | |
1341 | } | |
1342 | ||
1343 | static const uint8_t epel_weights[4][4][4] = { | |
1344 | {{ 16, 0, 0, 0 }, | |
1345 | { 12, 4, 0, 0 }, | |
1346 | { 8, 8, 0, 0 }, | |
1347 | { 4, 12, 0, 0 }}, | |
1348 | {{ 12, 0, 4, 0 }, | |
1349 | { 9, 3, 3, 1 }, | |
1350 | { 6, 6, 2, 2 }, | |
1351 | { 3, 9, 1, 3 }}, | |
1352 | {{ 8, 0, 8, 0 }, | |
1353 | { 6, 2, 6, 2 }, | |
1354 | { 4, 4, 4, 4 }, | |
1355 | { 2, 6, 2, 6 }}, | |
1356 | {{ 4, 0, 12, 0 }, | |
1357 | { 3, 1, 9, 3 }, | |
1358 | { 2, 2, 6, 6 }, | |
1359 | { 1, 3, 3, 9 }} | |
1360 | }; | |
1361 | ||
1362 | /** | |
1363 | * For block x,y, determine which of the hpel planes to do bilinear | |
1364 | * interpolation from and set src[] to the location in each hpel plane | |
1365 | * to MC from. | |
1366 | * | |
1367 | * @return the index of the put_dirac_pixels_tab function to use | |
1368 | * 0 for 1 plane (fpel,hpel), 1 for 2 planes (qpel), 2 for 4 planes (qpel), and 3 for epel | |
1369 | */ | |
1370 | static int mc_subpel(DiracContext *s, DiracBlock *block, const uint8_t *src[5], | |
1371 | int x, int y, int ref, int plane) | |
1372 | { | |
1373 | Plane *p = &s->plane[plane]; | |
1374 | uint8_t **ref_hpel = s->ref_pics[ref]->hpel[plane]; | |
1375 | int motion_x = block->u.mv[ref][0]; | |
1376 | int motion_y = block->u.mv[ref][1]; | |
1377 | int mx, my, i, epel, nplanes = 0; | |
1378 | ||
1379 | if (plane) { | |
1380 | motion_x >>= s->chroma_x_shift; | |
1381 | motion_y >>= s->chroma_y_shift; | |
1382 | } | |
1383 | ||
1384 | mx = motion_x & ~(-1U << s->mv_precision); | |
1385 | my = motion_y & ~(-1U << s->mv_precision); | |
1386 | motion_x >>= s->mv_precision; | |
1387 | motion_y >>= s->mv_precision; | |
1388 | /* normalize subpel coordinates to epel */ | |
1389 | /* TODO: template this function? */ | |
1390 | mx <<= 3 - s->mv_precision; | |
1391 | my <<= 3 - s->mv_precision; | |
1392 | ||
1393 | x += motion_x; | |
1394 | y += motion_y; | |
1395 | epel = (mx|my)&1; | |
1396 | ||
1397 | /* hpel position */ | |
1398 | if (!((mx|my)&3)) { | |
1399 | nplanes = 1; | |
1400 | src[0] = ref_hpel[(my>>1)+(mx>>2)] + y*p->stride + x; | |
1401 | } else { | |
1402 | /* qpel or epel */ | |
1403 | nplanes = 4; | |
1404 | for (i = 0; i < 4; i++) | |
1405 | src[i] = ref_hpel[i] + y*p->stride + x; | |
1406 | ||
1407 | /* if we're interpolating in the right/bottom halves, adjust the planes as needed | |
1408 | we increment x/y because the edge changes for half of the pixels */ | |
1409 | if (mx > 4) { | |
1410 | src[0] += 1; | |
1411 | src[2] += 1; | |
1412 | x++; | |
1413 | } | |
1414 | if (my > 4) { | |
1415 | src[0] += p->stride; | |
1416 | src[1] += p->stride; | |
1417 | y++; | |
1418 | } | |
1419 | ||
1420 | /* hpel planes are: | |
1421 | [0]: F [1]: H | |
1422 | [2]: V [3]: C */ | |
1423 | if (!epel) { | |
1424 | /* check if we really only need 2 planes since either mx or my is | |
1425 | a hpel position. (epel weights of 0 handle this there) */ | |
1426 | if (!(mx&3)) { | |
1427 | /* mx == 0: average [0] and [2] | |
1428 | mx == 4: average [1] and [3] */ | |
1429 | src[!mx] = src[2 + !!mx]; | |
1430 | nplanes = 2; | |
1431 | } else if (!(my&3)) { | |
1432 | src[0] = src[(my>>1) ]; | |
1433 | src[1] = src[(my>>1)+1]; | |
1434 | nplanes = 2; | |
1435 | } | |
1436 | } else { | |
1437 | /* adjust the ordering if needed so the weights work */ | |
1438 | if (mx > 4) { | |
1439 | FFSWAP(const uint8_t *, src[0], src[1]); | |
1440 | FFSWAP(const uint8_t *, src[2], src[3]); | |
1441 | } | |
1442 | if (my > 4) { | |
1443 | FFSWAP(const uint8_t *, src[0], src[2]); | |
1444 | FFSWAP(const uint8_t *, src[1], src[3]); | |
1445 | } | |
1446 | src[4] = epel_weights[my&3][mx&3]; | |
1447 | } | |
1448 | } | |
1449 | ||
1450 | /* fixme: v/h _edge_pos */ | |
1451 | if (x + p->xblen > p->width +EDGE_WIDTH/2 || | |
1452 | y + p->yblen > p->height+EDGE_WIDTH/2 || | |
1453 | x < 0 || y < 0) { | |
1454 | for (i = 0; i < nplanes; i++) { | |
1455 | s->vdsp.emulated_edge_mc(s->edge_emu_buffer[i], src[i], | |
1456 | p->stride, p->stride, | |
1457 | p->xblen, p->yblen, x, y, | |
1458 | p->width+EDGE_WIDTH/2, p->height+EDGE_WIDTH/2); | |
1459 | src[i] = s->edge_emu_buffer[i]; | |
1460 | } | |
1461 | } | |
1462 | return (nplanes>>1) + epel; | |
1463 | } | |
1464 | ||
1465 | static void add_dc(uint16_t *dst, int dc, int stride, | |
1466 | uint8_t *obmc_weight, int xblen, int yblen) | |
1467 | { | |
1468 | int x, y; | |
1469 | dc += 128; | |
1470 | ||
1471 | for (y = 0; y < yblen; y++) { | |
1472 | for (x = 0; x < xblen; x += 2) { | |
1473 | dst[x ] += dc * obmc_weight[x ]; | |
1474 | dst[x+1] += dc * obmc_weight[x+1]; | |
1475 | } | |
1476 | dst += stride; | |
1477 | obmc_weight += MAX_BLOCKSIZE; | |
1478 | } | |
1479 | } | |
1480 | ||
1481 | static void block_mc(DiracContext *s, DiracBlock *block, | |
1482 | uint16_t *mctmp, uint8_t *obmc_weight, | |
1483 | int plane, int dstx, int dsty) | |
1484 | { | |
1485 | Plane *p = &s->plane[plane]; | |
1486 | const uint8_t *src[5]; | |
1487 | int idx; | |
1488 | ||
1489 | switch (block->ref&3) { | |
1490 | case 0: /* DC */ | |
1491 | add_dc(mctmp, block->u.dc[plane], p->stride, obmc_weight, p->xblen, p->yblen); | |
1492 | return; | |
1493 | case 1: | |
1494 | case 2: | |
1495 | idx = mc_subpel(s, block, src, dstx, dsty, (block->ref&3)-1, plane); | |
1496 | s->put_pixels_tab[idx](s->mcscratch, src, p->stride, p->yblen); | |
1497 | if (s->weight_func) | |
1498 | s->weight_func(s->mcscratch, p->stride, s->weight_log2denom, | |
1499 | s->weight[0] + s->weight[1], p->yblen); | |
1500 | break; | |
1501 | case 3: | |
1502 | idx = mc_subpel(s, block, src, dstx, dsty, 0, plane); | |
1503 | s->put_pixels_tab[idx](s->mcscratch, src, p->stride, p->yblen); | |
1504 | idx = mc_subpel(s, block, src, dstx, dsty, 1, plane); | |
1505 | if (s->biweight_func) { | |
1506 | /* fixme: +32 is a quick hack */ | |
1507 | s->put_pixels_tab[idx](s->mcscratch + 32, src, p->stride, p->yblen); | |
1508 | s->biweight_func(s->mcscratch, s->mcscratch+32, p->stride, s->weight_log2denom, | |
1509 | s->weight[0], s->weight[1], p->yblen); | |
1510 | } else | |
1511 | s->avg_pixels_tab[idx](s->mcscratch, src, p->stride, p->yblen); | |
1512 | break; | |
1513 | } | |
1514 | s->add_obmc(mctmp, s->mcscratch, p->stride, obmc_weight, p->yblen); | |
1515 | } | |
1516 | ||
1517 | static void mc_row(DiracContext *s, DiracBlock *block, uint16_t *mctmp, int plane, int dsty) | |
1518 | { | |
1519 | Plane *p = &s->plane[plane]; | |
1520 | int x, dstx = p->xbsep - p->xoffset; | |
1521 | ||
1522 | block_mc(s, block, mctmp, s->obmc_weight[0], plane, -p->xoffset, dsty); | |
1523 | mctmp += p->xbsep; | |
1524 | ||
1525 | for (x = 1; x < s->blwidth-1; x++) { | |
1526 | block_mc(s, block+x, mctmp, s->obmc_weight[1], plane, dstx, dsty); | |
1527 | dstx += p->xbsep; | |
1528 | mctmp += p->xbsep; | |
1529 | } | |
1530 | block_mc(s, block+x, mctmp, s->obmc_weight[2], plane, dstx, dsty); | |
1531 | } | |
1532 | ||
1533 | static void select_dsp_funcs(DiracContext *s, int width, int height, int xblen, int yblen) | |
1534 | { | |
1535 | int idx = 0; | |
1536 | if (xblen > 8) | |
1537 | idx = 1; | |
1538 | if (xblen > 16) | |
1539 | idx = 2; | |
1540 | ||
1541 | memcpy(s->put_pixels_tab, s->diracdsp.put_dirac_pixels_tab[idx], sizeof(s->put_pixels_tab)); | |
1542 | memcpy(s->avg_pixels_tab, s->diracdsp.avg_dirac_pixels_tab[idx], sizeof(s->avg_pixels_tab)); | |
1543 | s->add_obmc = s->diracdsp.add_dirac_obmc[idx]; | |
1544 | if (s->weight_log2denom > 1 || s->weight[0] != 1 || s->weight[1] != 1) { | |
1545 | s->weight_func = s->diracdsp.weight_dirac_pixels_tab[idx]; | |
1546 | s->biweight_func = s->diracdsp.biweight_dirac_pixels_tab[idx]; | |
1547 | } else { | |
1548 | s->weight_func = NULL; | |
1549 | s->biweight_func = NULL; | |
1550 | } | |
1551 | } | |
1552 | ||
1553 | static void interpolate_refplane(DiracContext *s, DiracFrame *ref, int plane, int width, int height) | |
1554 | { | |
1555 | /* chroma allocates an edge of 8 when subsampled | |
1556 | which for 4:2:2 means an h edge of 16 and v edge of 8 | |
1557 | just use 8 for everything for the moment */ | |
1558 | int i, edge = EDGE_WIDTH/2; | |
1559 | ||
1560 | ref->hpel[plane][0] = ref->avframe->data[plane]; | |
1561 | 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 */ | |
1562 | ||
1563 | /* no need for hpel if we only have fpel vectors */ | |
1564 | if (!s->mv_precision) | |
1565 | return; | |
1566 | ||
1567 | for (i = 1; i < 4; i++) { | |
1568 | if (!ref->hpel_base[plane][i]) | |
1569 | ref->hpel_base[plane][i] = av_malloc((height+2*edge) * ref->avframe->linesize[plane] + 32); | |
1570 | /* we need to be 16-byte aligned even for chroma */ | |
1571 | ref->hpel[plane][i] = ref->hpel_base[plane][i] + edge*ref->avframe->linesize[plane] + 16; | |
1572 | } | |
1573 | ||
1574 | if (!ref->interpolated[plane]) { | |
1575 | s->diracdsp.dirac_hpel_filter(ref->hpel[plane][1], ref->hpel[plane][2], | |
1576 | ref->hpel[plane][3], ref->hpel[plane][0], | |
1577 | ref->avframe->linesize[plane], width, height); | |
1578 | s->mpvencdsp.draw_edges(ref->hpel[plane][1], ref->avframe->linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM); | |
1579 | s->mpvencdsp.draw_edges(ref->hpel[plane][2], ref->avframe->linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM); | |
1580 | s->mpvencdsp.draw_edges(ref->hpel[plane][3], ref->avframe->linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM); | |
1581 | } | |
1582 | ref->interpolated[plane] = 1; | |
1583 | } | |
1584 | ||
1585 | /** | |
1586 | * Dirac Specification -> | |
1587 | * 13.0 Transform data syntax. transform_data() | |
1588 | */ | |
1589 | static int dirac_decode_frame_internal(DiracContext *s) | |
1590 | { | |
1591 | DWTContext d; | |
1592 | int y, i, comp, dsty; | |
1593 | ||
1594 | if (s->low_delay) { | |
1595 | /* [DIRAC_STD] 13.5.1 low_delay_transform_data() */ | |
1596 | for (comp = 0; comp < 3; comp++) { | |
1597 | Plane *p = &s->plane[comp]; | |
1598 | memset(p->idwt_buf, 0, p->idwt_stride * p->idwt_height * sizeof(IDWTELEM)); | |
1599 | } | |
1600 | if (!s->zero_res) | |
1601 | decode_lowdelay(s); | |
1602 | } | |
1603 | ||
1604 | for (comp = 0; comp < 3; comp++) { | |
1605 | Plane *p = &s->plane[comp]; | |
1606 | uint8_t *frame = s->current_picture->avframe->data[comp]; | |
1607 | ||
1608 | /* FIXME: small resolutions */ | |
1609 | for (i = 0; i < 4; i++) | |
1610 | s->edge_emu_buffer[i] = s->edge_emu_buffer_base + i*FFALIGN(p->width, 16); | |
1611 | ||
1612 | if (!s->zero_res && !s->low_delay) | |
1613 | { | |
1614 | memset(p->idwt_buf, 0, p->idwt_stride * p->idwt_height * sizeof(IDWTELEM)); | |
1615 | decode_component(s, comp); /* [DIRAC_STD] 13.4.1 core_transform_data() */ | |
1616 | } | |
1617 | if (ff_spatial_idwt_init2(&d, p->idwt_buf, p->idwt_width, p->idwt_height, p->idwt_stride, | |
1618 | s->wavelet_idx+2, s->wavelet_depth, p->idwt_tmp)) | |
1619 | return -1; | |
1620 | ||
1621 | if (!s->num_refs) { /* intra */ | |
1622 | for (y = 0; y < p->height; y += 16) { | |
1623 | ff_spatial_idwt_slice2(&d, y+16); /* decode */ | |
1624 | s->diracdsp.put_signed_rect_clamped(frame + y*p->stride, p->stride, | |
1625 | p->idwt_buf + y*p->idwt_stride, p->idwt_stride, p->width, 16); | |
1626 | } | |
1627 | } else { /* inter */ | |
1628 | int rowheight = p->ybsep*p->stride; | |
1629 | ||
1630 | select_dsp_funcs(s, p->width, p->height, p->xblen, p->yblen); | |
1631 | ||
1632 | for (i = 0; i < s->num_refs; i++) | |
1633 | interpolate_refplane(s, s->ref_pics[i], comp, p->width, p->height); | |
1634 | ||
1635 | memset(s->mctmp, 0, 4*p->yoffset*p->stride); | |
1636 | ||
1637 | dsty = -p->yoffset; | |
1638 | for (y = 0; y < s->blheight; y++) { | |
1639 | int h = 0, | |
1640 | start = FFMAX(dsty, 0); | |
1641 | uint16_t *mctmp = s->mctmp + y*rowheight; | |
1642 | DiracBlock *blocks = s->blmotion + y*s->blwidth; | |
1643 | ||
1644 | init_obmc_weights(s, p, y); | |
1645 | ||
1646 | if (y == s->blheight-1 || start+p->ybsep > p->height) | |
1647 | h = p->height - start; | |
1648 | else | |
1649 | h = p->ybsep - (start - dsty); | |
1650 | if (h < 0) | |
1651 | break; | |
1652 | ||
1653 | memset(mctmp+2*p->yoffset*p->stride, 0, 2*rowheight); | |
1654 | mc_row(s, blocks, mctmp, comp, dsty); | |
1655 | ||
1656 | mctmp += (start - dsty)*p->stride + p->xoffset; | |
1657 | ff_spatial_idwt_slice2(&d, start + h); /* decode */ | |
1658 | s->diracdsp.add_rect_clamped(frame + start*p->stride, mctmp, p->stride, | |
1659 | p->idwt_buf + start*p->idwt_stride, p->idwt_stride, p->width, h); | |
1660 | ||
1661 | dsty += p->ybsep; | |
1662 | } | |
1663 | } | |
1664 | } | |
1665 | ||
1666 | ||
1667 | return 0; | |
1668 | } | |
1669 | ||
1670 | static int get_buffer_with_edge(AVCodecContext *avctx, AVFrame *f, int flags) | |
1671 | { | |
1672 | int ret, i; | |
1673 | int chroma_x_shift, chroma_y_shift; | |
1674 | avcodec_get_chroma_sub_sample(avctx->pix_fmt, &chroma_x_shift, &chroma_y_shift); | |
1675 | ||
1676 | f->width = avctx->width + 2 * EDGE_WIDTH; | |
1677 | f->height = avctx->height + 2 * EDGE_WIDTH + 2; | |
1678 | ret = ff_get_buffer(avctx, f, flags); | |
1679 | if (ret < 0) | |
1680 | return ret; | |
1681 | ||
1682 | for (i = 0; f->data[i]; i++) { | |
1683 | int offset = (EDGE_WIDTH >> (i && i<3 ? chroma_y_shift : 0)) * | |
1684 | f->linesize[i] + 32; | |
1685 | f->data[i] += offset; | |
1686 | } | |
1687 | f->width = avctx->width; | |
1688 | f->height = avctx->height; | |
1689 | ||
1690 | return 0; | |
1691 | } | |
1692 | ||
1693 | /** | |
1694 | * Dirac Specification -> | |
1695 | * 11.1.1 Picture Header. picture_header() | |
1696 | */ | |
1697 | static int dirac_decode_picture_header(DiracContext *s) | |
1698 | { | |
1699 | int retire, picnum; | |
1700 | int i, j, refnum, refdist; | |
1701 | GetBitContext *gb = &s->gb; | |
1702 | ||
1703 | /* [DIRAC_STD] 11.1.1 Picture Header. picture_header() PICTURE_NUM */ | |
1704 | picnum = s->current_picture->avframe->display_picture_number = get_bits_long(gb, 32); | |
1705 | ||
1706 | ||
1707 | av_log(s->avctx,AV_LOG_DEBUG,"PICTURE_NUM: %d\n",picnum); | |
1708 | ||
1709 | /* if this is the first keyframe after a sequence header, start our | |
1710 | reordering from here */ | |
1711 | if (s->frame_number < 0) | |
1712 | s->frame_number = picnum; | |
1713 | ||
1714 | s->ref_pics[0] = s->ref_pics[1] = NULL; | |
1715 | for (i = 0; i < s->num_refs; i++) { | |
1716 | refnum = picnum + dirac_get_se_golomb(gb); | |
1717 | refdist = INT_MAX; | |
1718 | ||
1719 | /* find the closest reference to the one we want */ | |
1720 | /* Jordi: this is needed if the referenced picture hasn't yet arrived */ | |
1721 | for (j = 0; j < MAX_REFERENCE_FRAMES && refdist; j++) | |
1722 | if (s->ref_frames[j] | |
1723 | && FFABS(s->ref_frames[j]->avframe->display_picture_number - refnum) < refdist) { | |
1724 | s->ref_pics[i] = s->ref_frames[j]; | |
1725 | refdist = FFABS(s->ref_frames[j]->avframe->display_picture_number - refnum); | |
1726 | } | |
1727 | ||
1728 | if (!s->ref_pics[i] || refdist) | |
1729 | av_log(s->avctx, AV_LOG_DEBUG, "Reference not found\n"); | |
1730 | ||
1731 | /* if there were no references at all, allocate one */ | |
1732 | if (!s->ref_pics[i]) | |
1733 | for (j = 0; j < MAX_FRAMES; j++) | |
1734 | if (!s->all_frames[j].avframe->data[0]) { | |
1735 | s->ref_pics[i] = &s->all_frames[j]; | |
1736 | get_buffer_with_edge(s->avctx, s->ref_pics[i]->avframe, AV_GET_BUFFER_FLAG_REF); | |
1737 | break; | |
1738 | } | |
1739 | } | |
1740 | ||
1741 | /* retire the reference frames that are not used anymore */ | |
1742 | if (s->current_picture->avframe->reference) { | |
1743 | retire = picnum + dirac_get_se_golomb(gb); | |
1744 | if (retire != picnum) { | |
1745 | DiracFrame *retire_pic = remove_frame(s->ref_frames, retire); | |
1746 | ||
1747 | if (retire_pic) | |
1748 | retire_pic->avframe->reference &= DELAYED_PIC_REF; | |
1749 | else | |
1750 | av_log(s->avctx, AV_LOG_DEBUG, "Frame to retire not found\n"); | |
1751 | } | |
1752 | ||
1753 | /* if reference array is full, remove the oldest as per the spec */ | |
1754 | while (add_frame(s->ref_frames, MAX_REFERENCE_FRAMES, s->current_picture)) { | |
1755 | av_log(s->avctx, AV_LOG_ERROR, "Reference frame overflow\n"); | |
1756 | remove_frame(s->ref_frames, s->ref_frames[0]->avframe->display_picture_number)->avframe->reference &= DELAYED_PIC_REF; | |
1757 | } | |
1758 | } | |
1759 | ||
1760 | if (s->num_refs) { | |
1761 | if (dirac_unpack_prediction_parameters(s)) /* [DIRAC_STD] 11.2 Picture Prediction Data. picture_prediction() */ | |
1762 | return -1; | |
1763 | if (dirac_unpack_block_motion_data(s)) /* [DIRAC_STD] 12. Block motion data syntax */ | |
1764 | return -1; | |
1765 | } | |
1766 | if (dirac_unpack_idwt_params(s)) /* [DIRAC_STD] 11.3 Wavelet transform data */ | |
1767 | return -1; | |
1768 | ||
1769 | init_planes(s); | |
1770 | return 0; | |
1771 | } | |
1772 | ||
1773 | static int get_delayed_pic(DiracContext *s, AVFrame *picture, int *got_frame) | |
1774 | { | |
1775 | DiracFrame *out = s->delay_frames[0]; | |
1776 | int i, out_idx = 0; | |
1777 | int ret; | |
1778 | ||
1779 | /* find frame with lowest picture number */ | |
1780 | for (i = 1; s->delay_frames[i]; i++) | |
1781 | if (s->delay_frames[i]->avframe->display_picture_number < out->avframe->display_picture_number) { | |
1782 | out = s->delay_frames[i]; | |
1783 | out_idx = i; | |
1784 | } | |
1785 | ||
1786 | for (i = out_idx; s->delay_frames[i]; i++) | |
1787 | s->delay_frames[i] = s->delay_frames[i+1]; | |
1788 | ||
1789 | if (out) { | |
1790 | out->avframe->reference ^= DELAYED_PIC_REF; | |
1791 | *got_frame = 1; | |
1792 | if((ret = av_frame_ref(picture, out->avframe)) < 0) | |
1793 | return ret; | |
1794 | } | |
1795 | ||
1796 | return 0; | |
1797 | } | |
1798 | ||
1799 | /** | |
1800 | * Dirac Specification -> | |
1801 | * 9.6 Parse Info Header Syntax. parse_info() | |
1802 | * 4 byte start code + byte parse code + 4 byte size + 4 byte previous size | |
1803 | */ | |
1804 | #define DATA_UNIT_HEADER_SIZE 13 | |
1805 | ||
1806 | /* [DIRAC_STD] dirac_decode_data_unit makes reference to the while defined in 9.3 | |
1807 | inside the function parse_sequence() */ | |
1808 | static int dirac_decode_data_unit(AVCodecContext *avctx, const uint8_t *buf, int size) | |
1809 | { | |
1810 | DiracContext *s = avctx->priv_data; | |
1811 | DiracFrame *pic = NULL; | |
1812 | int ret, i, parse_code = buf[4]; | |
1813 | unsigned tmp; | |
1814 | ||
1815 | if (size < DATA_UNIT_HEADER_SIZE) | |
1816 | return -1; | |
1817 | ||
1818 | init_get_bits(&s->gb, &buf[13], 8*(size - DATA_UNIT_HEADER_SIZE)); | |
1819 | ||
1820 | if (parse_code == pc_seq_header) { | |
1821 | if (s->seen_sequence_header) | |
1822 | return 0; | |
1823 | ||
1824 | /* [DIRAC_STD] 10. Sequence header */ | |
1825 | if (avpriv_dirac_parse_sequence_header(avctx, &s->gb, &s->source)) | |
1826 | return -1; | |
1827 | ||
1828 | avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_x_shift, &s->chroma_y_shift); | |
1829 | ||
1830 | if (alloc_sequence_buffers(s)) | |
1831 | return -1; | |
1832 | ||
1833 | s->seen_sequence_header = 1; | |
1834 | } else if (parse_code == pc_eos) { /* [DIRAC_STD] End of Sequence */ | |
1835 | free_sequence_buffers(s); | |
1836 | s->seen_sequence_header = 0; | |
1837 | } else if (parse_code == pc_aux_data) { | |
1838 | if (buf[13] == 1) { /* encoder implementation/version */ | |
1839 | int ver[3]; | |
1840 | /* versions older than 1.0.8 don't store quant delta for | |
1841 | subbands with only one codeblock */ | |
1842 | if (sscanf(buf+14, "Schroedinger %d.%d.%d", ver, ver+1, ver+2) == 3) | |
1843 | if (ver[0] == 1 && ver[1] == 0 && ver[2] <= 7) | |
1844 | s->old_delta_quant = 1; | |
1845 | } | |
1846 | } else if (parse_code & 0x8) { /* picture data unit */ | |
1847 | if (!s->seen_sequence_header) { | |
1848 | av_log(avctx, AV_LOG_DEBUG, "Dropping frame without sequence header\n"); | |
1849 | return -1; | |
1850 | } | |
1851 | ||
1852 | /* find an unused frame */ | |
1853 | for (i = 0; i < MAX_FRAMES; i++) | |
1854 | if (s->all_frames[i].avframe->data[0] == NULL) | |
1855 | pic = &s->all_frames[i]; | |
1856 | if (!pic) { | |
1857 | av_log(avctx, AV_LOG_ERROR, "framelist full\n"); | |
1858 | return -1; | |
1859 | } | |
1860 | ||
1861 | av_frame_unref(pic->avframe); | |
1862 | ||
1863 | /* [DIRAC_STD] Defined in 9.6.1 ... */ | |
1864 | tmp = parse_code & 0x03; /* [DIRAC_STD] num_refs() */ | |
1865 | if (tmp > 2) { | |
1866 | av_log(avctx, AV_LOG_ERROR, "num_refs of 3\n"); | |
1867 | return -1; | |
1868 | } | |
1869 | s->num_refs = tmp; | |
1870 | s->is_arith = (parse_code & 0x48) == 0x08; /* [DIRAC_STD] using_ac() */ | |
1871 | s->low_delay = (parse_code & 0x88) == 0x88; /* [DIRAC_STD] is_low_delay() */ | |
1872 | pic->avframe->reference = (parse_code & 0x0C) == 0x0C; /* [DIRAC_STD] is_reference() */ | |
1873 | pic->avframe->key_frame = s->num_refs == 0; /* [DIRAC_STD] is_intra() */ | |
1874 | pic->avframe->pict_type = s->num_refs + 1; /* Definition of AVPictureType in avutil.h */ | |
1875 | ||
1876 | if ((ret = get_buffer_with_edge(avctx, pic->avframe, (parse_code & 0x0C) == 0x0C ? AV_GET_BUFFER_FLAG_REF : 0)) < 0) | |
1877 | return ret; | |
1878 | s->current_picture = pic; | |
1879 | s->plane[0].stride = pic->avframe->linesize[0]; | |
1880 | s->plane[1].stride = pic->avframe->linesize[1]; | |
1881 | s->plane[2].stride = pic->avframe->linesize[2]; | |
1882 | ||
1883 | if (alloc_buffers(s, FFMAX3(FFABS(s->plane[0].stride), FFABS(s->plane[1].stride), FFABS(s->plane[2].stride))) < 0) | |
1884 | return AVERROR(ENOMEM); | |
1885 | ||
1886 | /* [DIRAC_STD] 11.1 Picture parse. picture_parse() */ | |
1887 | if (dirac_decode_picture_header(s)) | |
1888 | return -1; | |
1889 | ||
1890 | /* [DIRAC_STD] 13.0 Transform data syntax. transform_data() */ | |
1891 | if (dirac_decode_frame_internal(s)) | |
1892 | return -1; | |
1893 | } | |
1894 | return 0; | |
1895 | } | |
1896 | ||
1897 | static int dirac_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *pkt) | |
1898 | { | |
1899 | DiracContext *s = avctx->priv_data; | |
1900 | AVFrame *picture = data; | |
1901 | uint8_t *buf = pkt->data; | |
1902 | int buf_size = pkt->size; | |
1903 | int i, data_unit_size, buf_idx = 0; | |
1904 | int ret; | |
1905 | ||
1906 | /* release unused frames */ | |
1907 | for (i = 0; i < MAX_FRAMES; i++) | |
1908 | if (s->all_frames[i].avframe->data[0] && !s->all_frames[i].avframe->reference) { | |
1909 | av_frame_unref(s->all_frames[i].avframe); | |
1910 | memset(s->all_frames[i].interpolated, 0, sizeof(s->all_frames[i].interpolated)); | |
1911 | } | |
1912 | ||
1913 | s->current_picture = NULL; | |
1914 | *got_frame = 0; | |
1915 | ||
1916 | /* end of stream, so flush delayed pics */ | |
1917 | if (buf_size == 0) | |
1918 | return get_delayed_pic(s, (AVFrame *)data, got_frame); | |
1919 | ||
1920 | for (;;) { | |
1921 | /*[DIRAC_STD] Here starts the code from parse_info() defined in 9.6 | |
1922 | [DIRAC_STD] PARSE_INFO_PREFIX = "BBCD" as defined in ISO/IEC 646 | |
1923 | BBCD start code search */ | |
1924 | for (; buf_idx + DATA_UNIT_HEADER_SIZE < buf_size; buf_idx++) { | |
1925 | if (buf[buf_idx ] == 'B' && buf[buf_idx+1] == 'B' && | |
1926 | buf[buf_idx+2] == 'C' && buf[buf_idx+3] == 'D') | |
1927 | break; | |
1928 | } | |
1929 | /* BBCD found or end of data */ | |
1930 | if (buf_idx + DATA_UNIT_HEADER_SIZE >= buf_size) | |
1931 | break; | |
1932 | ||
1933 | data_unit_size = AV_RB32(buf+buf_idx+5); | |
1934 | if (buf_idx + data_unit_size > buf_size || !data_unit_size) { | |
1935 | if(buf_idx + data_unit_size > buf_size) | |
1936 | av_log(s->avctx, AV_LOG_ERROR, | |
1937 | "Data unit with size %d is larger than input buffer, discarding\n", | |
1938 | data_unit_size); | |
1939 | buf_idx += 4; | |
1940 | continue; | |
1941 | } | |
1942 | /* [DIRAC_STD] dirac_decode_data_unit makes reference to the while defined in 9.3 inside the function parse_sequence() */ | |
1943 | if (dirac_decode_data_unit(avctx, buf+buf_idx, data_unit_size)) | |
1944 | { | |
1945 | av_log(s->avctx, AV_LOG_ERROR,"Error in dirac_decode_data_unit\n"); | |
1946 | return -1; | |
1947 | } | |
1948 | buf_idx += data_unit_size; | |
1949 | } | |
1950 | ||
1951 | if (!s->current_picture) | |
1952 | return buf_size; | |
1953 | ||
1954 | if (s->current_picture->avframe->display_picture_number > s->frame_number) { | |
1955 | DiracFrame *delayed_frame = remove_frame(s->delay_frames, s->frame_number); | |
1956 | ||
1957 | s->current_picture->avframe->reference |= DELAYED_PIC_REF; | |
1958 | ||
1959 | if (add_frame(s->delay_frames, MAX_DELAY, s->current_picture)) { | |
1960 | int min_num = s->delay_frames[0]->avframe->display_picture_number; | |
1961 | /* Too many delayed frames, so we display the frame with the lowest pts */ | |
1962 | av_log(avctx, AV_LOG_ERROR, "Delay frame overflow\n"); | |
1963 | ||
1964 | for (i = 1; s->delay_frames[i]; i++) | |
1965 | if (s->delay_frames[i]->avframe->display_picture_number < min_num) | |
1966 | min_num = s->delay_frames[i]->avframe->display_picture_number; | |
1967 | ||
1968 | delayed_frame = remove_frame(s->delay_frames, min_num); | |
1969 | add_frame(s->delay_frames, MAX_DELAY, s->current_picture); | |
1970 | } | |
1971 | ||
1972 | if (delayed_frame) { | |
1973 | delayed_frame->avframe->reference ^= DELAYED_PIC_REF; | |
1974 | if((ret=av_frame_ref(data, delayed_frame->avframe)) < 0) | |
1975 | return ret; | |
1976 | *got_frame = 1; | |
1977 | } | |
1978 | } else if (s->current_picture->avframe->display_picture_number == s->frame_number) { | |
1979 | /* The right frame at the right time :-) */ | |
1980 | if((ret=av_frame_ref(data, s->current_picture->avframe)) < 0) | |
1981 | return ret; | |
1982 | *got_frame = 1; | |
1983 | } | |
1984 | ||
1985 | if (*got_frame) | |
1986 | s->frame_number = picture->display_picture_number + 1; | |
1987 | ||
1988 | return buf_idx; | |
1989 | } | |
1990 | ||
1991 | AVCodec ff_dirac_decoder = { | |
1992 | .name = "dirac", | |
1993 | .long_name = NULL_IF_CONFIG_SMALL("BBC Dirac VC-2"), | |
1994 | .type = AVMEDIA_TYPE_VIDEO, | |
1995 | .id = AV_CODEC_ID_DIRAC, | |
1996 | .priv_data_size = sizeof(DiracContext), | |
1997 | .init = dirac_decode_init, | |
1998 | .close = dirac_decode_end, | |
1999 | .decode = dirac_decode_frame, | |
2000 | .capabilities = CODEC_CAP_DELAY, | |
2001 | .flush = dirac_decode_flush, | |
2002 | }; |