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1 | /* |
2 | * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at> | |
3 | * Copyright (C) 2006 Robert Edele <yartrebo@earthlink.net> | |
4 | * | |
5 | * This file is part of FFmpeg. | |
6 | * | |
7 | * FFmpeg is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2.1 of the License, or (at your option) any later version. | |
11 | * | |
12 | * FFmpeg is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with FFmpeg; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | #ifndef AVCODEC_SNOW_H | |
23 | #define AVCODEC_SNOW_H | |
24 | ||
25 | #include "hpeldsp.h" | |
26 | #include "me_cmp.h" | |
27 | #include "qpeldsp.h" | |
28 | #include "snow_dwt.h" | |
29 | ||
30 | #include "rangecoder.h" | |
31 | #include "mathops.h" | |
32 | #include "mpegvideo.h" | |
33 | #include "h264qpel.h" | |
34 | ||
35 | #define MID_STATE 128 | |
36 | ||
37 | #define MAX_PLANES 4 | |
38 | #define QSHIFT 5 | |
39 | #define QROOT (1<<QSHIFT) | |
40 | #define LOSSLESS_QLOG -128 | |
41 | #define FRAC_BITS 4 | |
42 | #define MAX_REF_FRAMES 8 | |
43 | ||
44 | #define LOG2_OBMC_MAX 8 | |
45 | #define OBMC_MAX (1<<(LOG2_OBMC_MAX)) | |
46 | typedef struct BlockNode{ | |
47 | int16_t mx; | |
48 | int16_t my; | |
49 | uint8_t ref; | |
50 | uint8_t color[3]; | |
51 | uint8_t type; | |
52 | //#define TYPE_SPLIT 1 | |
53 | #define BLOCK_INTRA 1 | |
54 | #define BLOCK_OPT 2 | |
55 | //#define TYPE_NOCOLOR 4 | |
56 | uint8_t level; //FIXME merge into type? | |
57 | }BlockNode; | |
58 | ||
59 | static const BlockNode null_block= { //FIXME add border maybe | |
60 | .color= {128,128,128}, | |
61 | .mx= 0, | |
62 | .my= 0, | |
63 | .ref= 0, | |
64 | .type= 0, | |
65 | .level= 0, | |
66 | }; | |
67 | ||
68 | #define LOG2_MB_SIZE 4 | |
69 | #define MB_SIZE (1<<LOG2_MB_SIZE) | |
70 | #define ENCODER_EXTRA_BITS 4 | |
71 | #define HTAPS_MAX 8 | |
72 | ||
73 | typedef struct x_and_coeff{ | |
74 | int16_t x; | |
75 | uint16_t coeff; | |
76 | } x_and_coeff; | |
77 | ||
78 | typedef struct SubBand{ | |
79 | int level; | |
80 | int stride; | |
81 | int width; | |
82 | int height; | |
83 | int qlog; ///< log(qscale)/log[2^(1/6)] | |
84 | DWTELEM *buf; | |
85 | IDWTELEM *ibuf; | |
86 | int buf_x_offset; | |
87 | int buf_y_offset; | |
88 | int stride_line; ///< Stride measured in lines, not pixels. | |
89 | x_and_coeff * x_coeff; | |
90 | struct SubBand *parent; | |
91 | uint8_t state[/*7*2*/ 7 + 512][32]; | |
92 | }SubBand; | |
93 | ||
94 | typedef struct Plane{ | |
95 | int width; | |
96 | int height; | |
97 | SubBand band[MAX_DECOMPOSITIONS][4]; | |
98 | ||
99 | int htaps; | |
100 | int8_t hcoeff[HTAPS_MAX/2]; | |
101 | int diag_mc; | |
102 | int fast_mc; | |
103 | ||
104 | int last_htaps; | |
105 | int8_t last_hcoeff[HTAPS_MAX/2]; | |
106 | int last_diag_mc; | |
107 | }Plane; | |
108 | ||
109 | typedef struct SnowContext{ | |
110 | AVClass *class; | |
111 | AVCodecContext *avctx; | |
112 | RangeCoder c; | |
113 | MECmpContext mecc; | |
114 | HpelDSPContext hdsp; | |
115 | QpelDSPContext qdsp; | |
116 | VideoDSPContext vdsp; | |
117 | H264QpelContext h264qpel; | |
118 | MpegvideoEncDSPContext mpvencdsp; | |
119 | SnowDWTContext dwt; | |
120 | const AVFrame *new_picture; | |
121 | AVFrame *input_picture; ///< new_picture with the internal linesizes | |
122 | AVFrame *current_picture; | |
123 | AVFrame *last_picture[MAX_REF_FRAMES]; | |
124 | uint8_t *halfpel_plane[MAX_REF_FRAMES][4][4]; | |
125 | AVFrame *mconly_picture; | |
126 | // uint8_t q_context[16]; | |
127 | uint8_t header_state[32]; | |
128 | uint8_t block_state[128 + 32*128]; | |
129 | int keyframe; | |
130 | int always_reset; | |
131 | int version; | |
132 | int spatial_decomposition_type; | |
133 | int last_spatial_decomposition_type; | |
134 | int temporal_decomposition_type; | |
135 | int spatial_decomposition_count; | |
136 | int last_spatial_decomposition_count; | |
137 | int temporal_decomposition_count; | |
138 | int max_ref_frames; | |
139 | int ref_frames; | |
140 | int16_t (*ref_mvs[MAX_REF_FRAMES])[2]; | |
141 | uint32_t *ref_scores[MAX_REF_FRAMES]; | |
142 | DWTELEM *spatial_dwt_buffer; | |
143 | DWTELEM *temp_dwt_buffer; | |
144 | IDWTELEM *spatial_idwt_buffer; | |
145 | IDWTELEM *temp_idwt_buffer; | |
146 | int *run_buffer; | |
147 | int colorspace_type; | |
148 | int chroma_h_shift; | |
149 | int chroma_v_shift; | |
150 | int spatial_scalability; | |
151 | int qlog; | |
152 | int last_qlog; | |
153 | int lambda; | |
154 | int lambda2; | |
155 | int pass1_rc; | |
156 | int mv_scale; | |
157 | int last_mv_scale; | |
158 | int qbias; | |
159 | int last_qbias; | |
160 | #define QBIAS_SHIFT 3 | |
161 | int b_width; | |
162 | int b_height; | |
163 | int block_max_depth; | |
164 | int last_block_max_depth; | |
165 | int nb_planes; | |
166 | Plane plane[MAX_PLANES]; | |
167 | BlockNode *block; | |
168 | #define ME_CACHE_SIZE 1024 | |
169 | unsigned me_cache[ME_CACHE_SIZE]; | |
170 | unsigned me_cache_generation; | |
171 | slice_buffer sb; | |
172 | int memc_only; | |
173 | int no_bitstream; | |
174 | ||
175 | MpegEncContext m; // needed for motion estimation, should not be used for anything else, the idea is to eventually make the motion estimation independent of MpegEncContext, so this will be removed then (FIXME/XXX) | |
176 | ||
177 | uint8_t *scratchbuf; | |
178 | uint8_t *emu_edge_buffer; | |
179 | }SnowContext; | |
180 | ||
181 | /* Tables */ | |
182 | extern const uint8_t * const ff_obmc_tab[4]; | |
183 | extern uint8_t ff_qexp[QROOT]; | |
184 | extern int ff_scale_mv_ref[MAX_REF_FRAMES][MAX_REF_FRAMES]; | |
185 | ||
186 | /* C bits used by mmx/sse2/altivec */ | |
187 | ||
188 | static av_always_inline void snow_interleave_line_header(int * i, int width, IDWTELEM * low, IDWTELEM * high){ | |
189 | (*i) = (width) - 2; | |
190 | ||
191 | if (width & 1){ | |
192 | low[(*i)+1] = low[((*i)+1)>>1]; | |
193 | (*i)--; | |
194 | } | |
195 | } | |
196 | ||
197 | static av_always_inline void snow_interleave_line_footer(int * i, IDWTELEM * low, IDWTELEM * high){ | |
198 | for (; (*i)>=0; (*i)-=2){ | |
199 | low[(*i)+1] = high[(*i)>>1]; | |
200 | low[*i] = low[(*i)>>1]; | |
201 | } | |
202 | } | |
203 | ||
204 | static av_always_inline void snow_horizontal_compose_lift_lead_out(int i, IDWTELEM * dst, IDWTELEM * src, IDWTELEM * ref, int width, int w, int lift_high, int mul, int add, int shift){ | |
205 | for(; i<w; i++){ | |
206 | dst[i] = src[i] - ((mul * (ref[i] + ref[i + 1]) + add) >> shift); | |
207 | } | |
208 | ||
209 | if((width^lift_high)&1){ | |
210 | dst[w] = src[w] - ((mul * 2 * ref[w] + add) >> shift); | |
211 | } | |
212 | } | |
213 | ||
214 | static av_always_inline void snow_horizontal_compose_liftS_lead_out(int i, IDWTELEM * dst, IDWTELEM * src, IDWTELEM * ref, int width, int w){ | |
215 | for(; i<w; i++){ | |
216 | dst[i] = src[i] + ((ref[i] + ref[(i+1)]+W_BO + 4 * src[i]) >> W_BS); | |
217 | } | |
218 | ||
219 | if(width&1){ | |
220 | dst[w] = src[w] + ((2 * ref[w] + W_BO + 4 * src[w]) >> W_BS); | |
221 | } | |
222 | } | |
223 | ||
224 | /* common code */ | |
225 | ||
226 | int ff_snow_common_init(AVCodecContext *avctx); | |
227 | int ff_snow_common_init_after_header(AVCodecContext *avctx); | |
228 | void ff_snow_common_end(SnowContext *s); | |
229 | void ff_snow_release_buffer(AVCodecContext *avctx); | |
230 | void ff_snow_reset_contexts(SnowContext *s); | |
231 | int ff_snow_alloc_blocks(SnowContext *s); | |
232 | int ff_snow_frame_start(SnowContext *s); | |
233 | void ff_snow_pred_block(SnowContext *s, uint8_t *dst, uint8_t *tmp, ptrdiff_t stride, | |
234 | int sx, int sy, int b_w, int b_h, BlockNode *block, | |
235 | int plane_index, int w, int h); | |
236 | int ff_snow_get_buffer(SnowContext *s, AVFrame *frame); | |
237 | /* common inline functions */ | |
238 | //XXX doublecheck all of them should stay inlined | |
239 | ||
240 | static inline void snow_set_blocks(SnowContext *s, int level, int x, int y, int l, int cb, int cr, int mx, int my, int ref, int type){ | |
241 | const int w= s->b_width << s->block_max_depth; | |
242 | const int rem_depth= s->block_max_depth - level; | |
243 | const int index= (x + y*w) << rem_depth; | |
244 | const int block_w= 1<<rem_depth; | |
245 | BlockNode block; | |
246 | int i,j; | |
247 | ||
248 | block.color[0]= l; | |
249 | block.color[1]= cb; | |
250 | block.color[2]= cr; | |
251 | block.mx= mx; | |
252 | block.my= my; | |
253 | block.ref= ref; | |
254 | block.type= type; | |
255 | block.level= level; | |
256 | ||
257 | for(j=0; j<block_w; j++){ | |
258 | for(i=0; i<block_w; i++){ | |
259 | s->block[index + i + j*w]= block; | |
260 | } | |
261 | } | |
262 | } | |
263 | ||
264 | static inline void pred_mv(SnowContext *s, int *mx, int *my, int ref, | |
265 | const BlockNode *left, const BlockNode *top, const BlockNode *tr){ | |
266 | if(s->ref_frames == 1){ | |
267 | *mx = mid_pred(left->mx, top->mx, tr->mx); | |
268 | *my = mid_pred(left->my, top->my, tr->my); | |
269 | }else{ | |
270 | const int *scale = ff_scale_mv_ref[ref]; | |
271 | *mx = mid_pred((left->mx * scale[left->ref] + 128) >>8, | |
272 | (top ->mx * scale[top ->ref] + 128) >>8, | |
273 | (tr ->mx * scale[tr ->ref] + 128) >>8); | |
274 | *my = mid_pred((left->my * scale[left->ref] + 128) >>8, | |
275 | (top ->my * scale[top ->ref] + 128) >>8, | |
276 | (tr ->my * scale[tr ->ref] + 128) >>8); | |
277 | } | |
278 | } | |
279 | ||
280 | static av_always_inline int same_block(BlockNode *a, BlockNode *b){ | |
281 | if((a->type&BLOCK_INTRA) && (b->type&BLOCK_INTRA)){ | |
282 | return !((a->color[0] - b->color[0]) | (a->color[1] - b->color[1]) | (a->color[2] - b->color[2])); | |
283 | }else{ | |
284 | return !((a->mx - b->mx) | (a->my - b->my) | (a->ref - b->ref) | ((a->type ^ b->type)&BLOCK_INTRA)); | |
285 | } | |
286 | } | |
287 | ||
288 | //FIXME name cleanup (b_w, block_w, b_width stuff) | |
289 | //XXX should we really inline it? | |
290 | static av_always_inline void add_yblock(SnowContext *s, int sliced, slice_buffer *sb, IDWTELEM *dst, uint8_t *dst8, const uint8_t *obmc, int src_x, int src_y, int b_w, int b_h, int w, int h, int dst_stride, int src_stride, int obmc_stride, int b_x, int b_y, int add, int offset_dst, int plane_index){ | |
291 | const int b_width = s->b_width << s->block_max_depth; | |
292 | const int b_height= s->b_height << s->block_max_depth; | |
293 | const int b_stride= b_width; | |
294 | BlockNode *lt= &s->block[b_x + b_y*b_stride]; | |
295 | BlockNode *rt= lt+1; | |
296 | BlockNode *lb= lt+b_stride; | |
297 | BlockNode *rb= lb+1; | |
298 | uint8_t *block[4]; | |
299 | int tmp_step= src_stride >= 7*MB_SIZE ? MB_SIZE : MB_SIZE*src_stride; | |
300 | uint8_t *tmp = s->scratchbuf; | |
301 | uint8_t *ptmp; | |
302 | int x,y; | |
303 | ||
304 | if(b_x<0){ | |
305 | lt= rt; | |
306 | lb= rb; | |
307 | }else if(b_x + 1 >= b_width){ | |
308 | rt= lt; | |
309 | rb= lb; | |
310 | } | |
311 | if(b_y<0){ | |
312 | lt= lb; | |
313 | rt= rb; | |
314 | }else if(b_y + 1 >= b_height){ | |
315 | lb= lt; | |
316 | rb= rt; | |
317 | } | |
318 | ||
319 | if(src_x<0){ //FIXME merge with prev & always round internal width up to *16 | |
320 | obmc -= src_x; | |
321 | b_w += src_x; | |
322 | if(!sliced && !offset_dst) | |
323 | dst -= src_x; | |
324 | src_x=0; | |
325 | } | |
326 | if(src_x + b_w > w){ | |
327 | b_w = w - src_x; | |
328 | } | |
329 | if(src_y<0){ | |
330 | obmc -= src_y*obmc_stride; | |
331 | b_h += src_y; | |
332 | if(!sliced && !offset_dst) | |
333 | dst -= src_y*dst_stride; | |
334 | src_y=0; | |
335 | } | |
336 | if(src_y + b_h> h){ | |
337 | b_h = h - src_y; | |
338 | } | |
339 | ||
340 | if(b_w<=0 || b_h<=0) return; | |
341 | ||
342 | av_assert2(src_stride > 2*MB_SIZE + 5); | |
343 | ||
344 | if(!sliced && offset_dst) | |
345 | dst += src_x + src_y*dst_stride; | |
346 | dst8+= src_x + src_y*src_stride; | |
347 | // src += src_x + src_y*src_stride; | |
348 | ||
349 | ptmp= tmp + 3*tmp_step; | |
350 | block[0]= ptmp; | |
351 | ptmp+=tmp_step; | |
352 | ff_snow_pred_block(s, block[0], tmp, src_stride, src_x, src_y, b_w, b_h, lt, plane_index, w, h); | |
353 | ||
354 | if(same_block(lt, rt)){ | |
355 | block[1]= block[0]; | |
356 | }else{ | |
357 | block[1]= ptmp; | |
358 | ptmp+=tmp_step; | |
359 | ff_snow_pred_block(s, block[1], tmp, src_stride, src_x, src_y, b_w, b_h, rt, plane_index, w, h); | |
360 | } | |
361 | ||
362 | if(same_block(lt, lb)){ | |
363 | block[2]= block[0]; | |
364 | }else if(same_block(rt, lb)){ | |
365 | block[2]= block[1]; | |
366 | }else{ | |
367 | block[2]= ptmp; | |
368 | ptmp+=tmp_step; | |
369 | ff_snow_pred_block(s, block[2], tmp, src_stride, src_x, src_y, b_w, b_h, lb, plane_index, w, h); | |
370 | } | |
371 | ||
372 | if(same_block(lt, rb) ){ | |
373 | block[3]= block[0]; | |
374 | }else if(same_block(rt, rb)){ | |
375 | block[3]= block[1]; | |
376 | }else if(same_block(lb, rb)){ | |
377 | block[3]= block[2]; | |
378 | }else{ | |
379 | block[3]= ptmp; | |
380 | ff_snow_pred_block(s, block[3], tmp, src_stride, src_x, src_y, b_w, b_h, rb, plane_index, w, h); | |
381 | } | |
382 | if(sliced){ | |
383 | s->dwt.inner_add_yblock(obmc, obmc_stride, block, b_w, b_h, src_x,src_y, src_stride, sb, add, dst8); | |
384 | }else{ | |
385 | for(y=0; y<b_h; y++){ | |
386 | //FIXME ugly misuse of obmc_stride | |
387 | const uint8_t *obmc1= obmc + y*obmc_stride; | |
388 | const uint8_t *obmc2= obmc1+ (obmc_stride>>1); | |
389 | const uint8_t *obmc3= obmc1+ obmc_stride*(obmc_stride>>1); | |
390 | const uint8_t *obmc4= obmc3+ (obmc_stride>>1); | |
391 | for(x=0; x<b_w; x++){ | |
392 | int v= obmc1[x] * block[3][x + y*src_stride] | |
393 | +obmc2[x] * block[2][x + y*src_stride] | |
394 | +obmc3[x] * block[1][x + y*src_stride] | |
395 | +obmc4[x] * block[0][x + y*src_stride]; | |
396 | ||
397 | v <<= 8 - LOG2_OBMC_MAX; | |
398 | if(FRAC_BITS != 8){ | |
399 | v >>= 8 - FRAC_BITS; | |
400 | } | |
401 | if(add){ | |
402 | v += dst[x + y*dst_stride]; | |
403 | v = (v + (1<<(FRAC_BITS-1))) >> FRAC_BITS; | |
404 | if(v&(~255)) v= ~(v>>31); | |
405 | dst8[x + y*src_stride] = v; | |
406 | }else{ | |
407 | dst[x + y*dst_stride] -= v; | |
408 | } | |
409 | } | |
410 | } | |
411 | } | |
412 | } | |
413 | ||
414 | static av_always_inline void predict_slice(SnowContext *s, IDWTELEM *buf, int plane_index, int add, int mb_y){ | |
415 | Plane *p= &s->plane[plane_index]; | |
416 | const int mb_w= s->b_width << s->block_max_depth; | |
417 | const int mb_h= s->b_height << s->block_max_depth; | |
418 | int x, y, mb_x; | |
419 | int block_size = MB_SIZE >> s->block_max_depth; | |
420 | int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size; | |
421 | int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size; | |
422 | const uint8_t *obmc = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth]; | |
423 | const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size; | |
424 | int ref_stride= s->current_picture->linesize[plane_index]; | |
425 | uint8_t *dst8= s->current_picture->data[plane_index]; | |
426 | int w= p->width; | |
427 | int h= p->height; | |
428 | av_assert2(s->chroma_h_shift == s->chroma_v_shift); // obmc params assume squares | |
429 | if(s->keyframe || (s->avctx->debug&512)){ | |
430 | if(mb_y==mb_h) | |
431 | return; | |
432 | ||
433 | if(add){ | |
434 | for(y=block_h*mb_y; y<FFMIN(h,block_h*(mb_y+1)); y++){ | |
435 | for(x=0; x<w; x++){ | |
436 | int v= buf[x + y*w] + (128<<FRAC_BITS) + (1<<(FRAC_BITS-1)); | |
437 | v >>= FRAC_BITS; | |
438 | if(v&(~255)) v= ~(v>>31); | |
439 | dst8[x + y*ref_stride]= v; | |
440 | } | |
441 | } | |
442 | }else{ | |
443 | for(y=block_h*mb_y; y<FFMIN(h,block_h*(mb_y+1)); y++){ | |
444 | for(x=0; x<w; x++){ | |
445 | buf[x + y*w]-= 128<<FRAC_BITS; | |
446 | } | |
447 | } | |
448 | } | |
449 | ||
450 | return; | |
451 | } | |
452 | ||
453 | for(mb_x=0; mb_x<=mb_w; mb_x++){ | |
454 | add_yblock(s, 0, NULL, buf, dst8, obmc, | |
455 | block_w*mb_x - block_w/2, | |
456 | block_h*mb_y - block_h/2, | |
457 | block_w, block_h, | |
458 | w, h, | |
459 | w, ref_stride, obmc_stride, | |
460 | mb_x - 1, mb_y - 1, | |
461 | add, 1, plane_index); | |
462 | } | |
463 | } | |
464 | ||
465 | static av_always_inline void predict_plane(SnowContext *s, IDWTELEM *buf, int plane_index, int add){ | |
466 | const int mb_h= s->b_height << s->block_max_depth; | |
467 | int mb_y; | |
468 | for(mb_y=0; mb_y<=mb_h; mb_y++) | |
469 | predict_slice(s, buf, plane_index, add, mb_y); | |
470 | } | |
471 | ||
472 | static inline void set_blocks(SnowContext *s, int level, int x, int y, int l, int cb, int cr, int mx, int my, int ref, int type){ | |
473 | const int w= s->b_width << s->block_max_depth; | |
474 | const int rem_depth= s->block_max_depth - level; | |
475 | const int index= (x + y*w) << rem_depth; | |
476 | const int block_w= 1<<rem_depth; | |
477 | const int block_h= 1<<rem_depth; //FIXME "w!=h" | |
478 | BlockNode block; | |
479 | int i,j; | |
480 | ||
481 | block.color[0]= l; | |
482 | block.color[1]= cb; | |
483 | block.color[2]= cr; | |
484 | block.mx= mx; | |
485 | block.my= my; | |
486 | block.ref= ref; | |
487 | block.type= type; | |
488 | block.level= level; | |
489 | ||
490 | for(j=0; j<block_h; j++){ | |
491 | for(i=0; i<block_w; i++){ | |
492 | s->block[index + i + j*w]= block; | |
493 | } | |
494 | } | |
495 | } | |
496 | ||
497 | static inline void init_ref(MotionEstContext *c, uint8_t *src[3], uint8_t *ref[3], uint8_t *ref2[3], int x, int y, int ref_index){ | |
498 | SnowContext *s = c->avctx->priv_data; | |
499 | const int offset[3]= { | |
500 | y*c-> stride + x, | |
501 | ((y*c->uvstride + x)>>s->chroma_h_shift), | |
502 | ((y*c->uvstride + x)>>s->chroma_h_shift), | |
503 | }; | |
504 | int i; | |
505 | for(i=0; i<3; i++){ | |
506 | c->src[0][i]= src [i]; | |
507 | c->ref[0][i]= ref [i] + offset[i]; | |
508 | } | |
509 | av_assert2(!ref_index); | |
510 | } | |
511 | ||
512 | ||
513 | /* bitstream functions */ | |
514 | ||
515 | extern const int8_t ff_quant3bA[256]; | |
516 | ||
517 | #define QEXPSHIFT (7-FRAC_BITS+8) //FIXME try to change this to 0 | |
518 | ||
519 | static inline void put_symbol(RangeCoder *c, uint8_t *state, int v, int is_signed){ | |
520 | int i; | |
521 | ||
522 | if(v){ | |
523 | const int a= FFABS(v); | |
524 | const int e= av_log2(a); | |
525 | const int el= FFMIN(e, 10); | |
526 | put_rac(c, state+0, 0); | |
527 | ||
528 | for(i=0; i<el; i++){ | |
529 | put_rac(c, state+1+i, 1); //1..10 | |
530 | } | |
531 | for(; i<e; i++){ | |
532 | put_rac(c, state+1+9, 1); //1..10 | |
533 | } | |
534 | put_rac(c, state+1+FFMIN(i,9), 0); | |
535 | ||
536 | for(i=e-1; i>=el; i--){ | |
537 | put_rac(c, state+22+9, (a>>i)&1); //22..31 | |
538 | } | |
539 | for(; i>=0; i--){ | |
540 | put_rac(c, state+22+i, (a>>i)&1); //22..31 | |
541 | } | |
542 | ||
543 | if(is_signed) | |
544 | put_rac(c, state+11 + el, v < 0); //11..21 | |
545 | }else{ | |
546 | put_rac(c, state+0, 1); | |
547 | } | |
548 | } | |
549 | ||
550 | static inline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed){ | |
551 | if(get_rac(c, state+0)) | |
552 | return 0; | |
553 | else{ | |
554 | int i, e, a; | |
555 | e= 0; | |
556 | while(get_rac(c, state+1 + FFMIN(e,9))){ //1..10 | |
557 | e++; | |
558 | } | |
559 | ||
560 | a= 1; | |
561 | for(i=e-1; i>=0; i--){ | |
562 | a += a + get_rac(c, state+22 + FFMIN(i,9)); //22..31 | |
563 | } | |
564 | ||
565 | e= -(is_signed && get_rac(c, state+11 + FFMIN(e,10))); //11..21 | |
566 | return (a^e)-e; | |
567 | } | |
568 | } | |
569 | ||
570 | static inline void put_symbol2(RangeCoder *c, uint8_t *state, int v, int log2){ | |
571 | int i; | |
572 | int r= log2>=0 ? 1<<log2 : 1; | |
573 | ||
574 | av_assert2(v>=0); | |
575 | av_assert2(log2>=-4); | |
576 | ||
577 | while(v >= r){ | |
578 | put_rac(c, state+4+log2, 1); | |
579 | v -= r; | |
580 | log2++; | |
581 | if(log2>0) r+=r; | |
582 | } | |
583 | put_rac(c, state+4+log2, 0); | |
584 | ||
585 | for(i=log2-1; i>=0; i--){ | |
586 | put_rac(c, state+31-i, (v>>i)&1); | |
587 | } | |
588 | } | |
589 | ||
590 | static inline int get_symbol2(RangeCoder *c, uint8_t *state, int log2){ | |
591 | int i; | |
592 | int r= log2>=0 ? 1<<log2 : 1; | |
593 | int v=0; | |
594 | ||
595 | av_assert2(log2>=-4); | |
596 | ||
597 | while(log2<28 && get_rac(c, state+4+log2)){ | |
598 | v+= r; | |
599 | log2++; | |
600 | if(log2>0) r+=r; | |
601 | } | |
602 | ||
603 | for(i=log2-1; i>=0; i--){ | |
604 | v+= get_rac(c, state+31-i)<<i; | |
605 | } | |
606 | ||
607 | return v; | |
608 | } | |
609 | ||
610 | static inline void unpack_coeffs(SnowContext *s, SubBand *b, SubBand * parent, int orientation){ | |
611 | const int w= b->width; | |
612 | const int h= b->height; | |
613 | int x,y; | |
614 | ||
615 | int run, runs; | |
616 | x_and_coeff *xc= b->x_coeff; | |
617 | x_and_coeff *prev_xc= NULL; | |
618 | x_and_coeff *prev2_xc= xc; | |
619 | x_and_coeff *parent_xc= parent ? parent->x_coeff : NULL; | |
620 | x_and_coeff *prev_parent_xc= parent_xc; | |
621 | ||
622 | runs= get_symbol2(&s->c, b->state[30], 0); | |
623 | if(runs-- > 0) run= get_symbol2(&s->c, b->state[1], 3); | |
624 | else run= INT_MAX; | |
625 | ||
626 | for(y=0; y<h; y++){ | |
627 | int v=0; | |
628 | int lt=0, t=0, rt=0; | |
629 | ||
630 | if(y && prev_xc->x == 0){ | |
631 | rt= prev_xc->coeff; | |
632 | } | |
633 | for(x=0; x<w; x++){ | |
634 | int p=0; | |
635 | const int l= v; | |
636 | ||
637 | lt= t; t= rt; | |
638 | ||
639 | if(y){ | |
640 | if(prev_xc->x <= x) | |
641 | prev_xc++; | |
642 | if(prev_xc->x == x + 1) | |
643 | rt= prev_xc->coeff; | |
644 | else | |
645 | rt=0; | |
646 | } | |
647 | if(parent_xc){ | |
648 | if(x>>1 > parent_xc->x){ | |
649 | parent_xc++; | |
650 | } | |
651 | if(x>>1 == parent_xc->x){ | |
652 | p= parent_xc->coeff; | |
653 | } | |
654 | } | |
655 | if(/*ll|*/l|lt|t|rt|p){ | |
656 | int context= av_log2(/*FFABS(ll) + */3*(l>>1) + (lt>>1) + (t&~1) + (rt>>1) + (p>>1)); | |
657 | ||
658 | v=get_rac(&s->c, &b->state[0][context]); | |
659 | if(v){ | |
660 | v= 2*(get_symbol2(&s->c, b->state[context + 2], context-4) + 1); | |
661 | v+=get_rac(&s->c, &b->state[0][16 + 1 + 3 + ff_quant3bA[l&0xFF] + 3*ff_quant3bA[t&0xFF]]); | |
662 | if ((uint16_t)v != v) { | |
663 | av_log(s->avctx, AV_LOG_ERROR, "Coefficient damaged\n"); | |
664 | v = 1; | |
665 | } | |
666 | xc->x=x; | |
667 | (xc++)->coeff= v; | |
668 | } | |
669 | }else{ | |
670 | if(!run){ | |
671 | if(runs-- > 0) run= get_symbol2(&s->c, b->state[1], 3); | |
672 | else run= INT_MAX; | |
673 | v= 2*(get_symbol2(&s->c, b->state[0 + 2], 0-4) + 1); | |
674 | v+=get_rac(&s->c, &b->state[0][16 + 1 + 3]); | |
675 | if ((uint16_t)v != v) { | |
676 | av_log(s->avctx, AV_LOG_ERROR, "Coefficient damaged\n"); | |
677 | v = 1; | |
678 | } | |
679 | ||
680 | xc->x=x; | |
681 | (xc++)->coeff= v; | |
682 | }else{ | |
683 | int max_run; | |
684 | run--; | |
685 | v=0; | |
686 | av_assert2(run >= 0); | |
687 | if(y) max_run= FFMIN(run, prev_xc->x - x - 2); | |
688 | else max_run= FFMIN(run, w-x-1); | |
689 | if(parent_xc) | |
690 | max_run= FFMIN(max_run, 2*parent_xc->x - x - 1); | |
691 | av_assert2(max_run >= 0 && max_run <= run); | |
692 | ||
693 | x+= max_run; | |
694 | run-= max_run; | |
695 | } | |
696 | } | |
697 | } | |
698 | (xc++)->x= w+1; //end marker | |
699 | prev_xc= prev2_xc; | |
700 | prev2_xc= xc; | |
701 | ||
702 | if(parent_xc){ | |
703 | if(y&1){ | |
704 | while(parent_xc->x != parent->width+1) | |
705 | parent_xc++; | |
706 | parent_xc++; | |
707 | prev_parent_xc= parent_xc; | |
708 | }else{ | |
709 | parent_xc= prev_parent_xc; | |
710 | } | |
711 | } | |
712 | } | |
713 | ||
714 | (xc++)->x= w+1; //end marker | |
715 | } | |
716 | ||
717 | #endif /* AVCODEC_SNOW_H */ |