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2ba45a60 DM |
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" | |
f6fa7814 DM |
32 | |
33 | #define FF_MPV_OFFSET(x) (offsetof(MpegEncContext, x) + offsetof(SnowContext, m)) | |
2ba45a60 DM |
34 | #include "mpegvideo.h" |
35 | #include "h264qpel.h" | |
36 | ||
37 | #define MID_STATE 128 | |
38 | ||
39 | #define MAX_PLANES 4 | |
40 | #define QSHIFT 5 | |
41 | #define QROOT (1<<QSHIFT) | |
42 | #define LOSSLESS_QLOG -128 | |
43 | #define FRAC_BITS 4 | |
44 | #define MAX_REF_FRAMES 8 | |
45 | ||
46 | #define LOG2_OBMC_MAX 8 | |
47 | #define OBMC_MAX (1<<(LOG2_OBMC_MAX)) | |
48 | typedef struct BlockNode{ | |
49 | int16_t mx; | |
50 | int16_t my; | |
51 | uint8_t ref; | |
52 | uint8_t color[3]; | |
53 | uint8_t type; | |
54 | //#define TYPE_SPLIT 1 | |
55 | #define BLOCK_INTRA 1 | |
56 | #define BLOCK_OPT 2 | |
57 | //#define TYPE_NOCOLOR 4 | |
58 | uint8_t level; //FIXME merge into type? | |
59 | }BlockNode; | |
60 | ||
61 | static const BlockNode null_block= { //FIXME add border maybe | |
62 | .color= {128,128,128}, | |
63 | .mx= 0, | |
64 | .my= 0, | |
65 | .ref= 0, | |
66 | .type= 0, | |
67 | .level= 0, | |
68 | }; | |
69 | ||
70 | #define LOG2_MB_SIZE 4 | |
71 | #define MB_SIZE (1<<LOG2_MB_SIZE) | |
72 | #define ENCODER_EXTRA_BITS 4 | |
73 | #define HTAPS_MAX 8 | |
74 | ||
75 | typedef struct x_and_coeff{ | |
76 | int16_t x; | |
77 | uint16_t coeff; | |
78 | } x_and_coeff; | |
79 | ||
80 | typedef struct SubBand{ | |
81 | int level; | |
82 | int stride; | |
83 | int width; | |
84 | int height; | |
85 | int qlog; ///< log(qscale)/log[2^(1/6)] | |
86 | DWTELEM *buf; | |
87 | IDWTELEM *ibuf; | |
88 | int buf_x_offset; | |
89 | int buf_y_offset; | |
90 | int stride_line; ///< Stride measured in lines, not pixels. | |
91 | x_and_coeff * x_coeff; | |
92 | struct SubBand *parent; | |
93 | uint8_t state[/*7*2*/ 7 + 512][32]; | |
94 | }SubBand; | |
95 | ||
96 | typedef struct Plane{ | |
97 | int width; | |
98 | int height; | |
99 | SubBand band[MAX_DECOMPOSITIONS][4]; | |
100 | ||
101 | int htaps; | |
102 | int8_t hcoeff[HTAPS_MAX/2]; | |
103 | int diag_mc; | |
104 | int fast_mc; | |
105 | ||
106 | int last_htaps; | |
107 | int8_t last_hcoeff[HTAPS_MAX/2]; | |
108 | int last_diag_mc; | |
109 | }Plane; | |
110 | ||
111 | typedef struct SnowContext{ | |
112 | AVClass *class; | |
113 | AVCodecContext *avctx; | |
114 | RangeCoder c; | |
115 | MECmpContext mecc; | |
116 | HpelDSPContext hdsp; | |
117 | QpelDSPContext qdsp; | |
118 | VideoDSPContext vdsp; | |
119 | H264QpelContext h264qpel; | |
120 | MpegvideoEncDSPContext mpvencdsp; | |
121 | SnowDWTContext dwt; | |
122 | const AVFrame *new_picture; | |
123 | AVFrame *input_picture; ///< new_picture with the internal linesizes | |
124 | AVFrame *current_picture; | |
125 | AVFrame *last_picture[MAX_REF_FRAMES]; | |
126 | uint8_t *halfpel_plane[MAX_REF_FRAMES][4][4]; | |
127 | AVFrame *mconly_picture; | |
128 | // uint8_t q_context[16]; | |
129 | uint8_t header_state[32]; | |
130 | uint8_t block_state[128 + 32*128]; | |
131 | int keyframe; | |
132 | int always_reset; | |
133 | int version; | |
134 | int spatial_decomposition_type; | |
135 | int last_spatial_decomposition_type; | |
136 | int temporal_decomposition_type; | |
137 | int spatial_decomposition_count; | |
138 | int last_spatial_decomposition_count; | |
139 | int temporal_decomposition_count; | |
140 | int max_ref_frames; | |
141 | int ref_frames; | |
142 | int16_t (*ref_mvs[MAX_REF_FRAMES])[2]; | |
143 | uint32_t *ref_scores[MAX_REF_FRAMES]; | |
144 | DWTELEM *spatial_dwt_buffer; | |
145 | DWTELEM *temp_dwt_buffer; | |
146 | IDWTELEM *spatial_idwt_buffer; | |
147 | IDWTELEM *temp_idwt_buffer; | |
148 | int *run_buffer; | |
149 | int colorspace_type; | |
150 | int chroma_h_shift; | |
151 | int chroma_v_shift; | |
152 | int spatial_scalability; | |
153 | int qlog; | |
154 | int last_qlog; | |
155 | int lambda; | |
156 | int lambda2; | |
157 | int pass1_rc; | |
158 | int mv_scale; | |
159 | int last_mv_scale; | |
160 | int qbias; | |
161 | int last_qbias; | |
162 | #define QBIAS_SHIFT 3 | |
163 | int b_width; | |
164 | int b_height; | |
165 | int block_max_depth; | |
166 | int last_block_max_depth; | |
167 | int nb_planes; | |
168 | Plane plane[MAX_PLANES]; | |
169 | BlockNode *block; | |
170 | #define ME_CACHE_SIZE 1024 | |
171 | unsigned me_cache[ME_CACHE_SIZE]; | |
172 | unsigned me_cache_generation; | |
173 | slice_buffer sb; | |
174 | int memc_only; | |
175 | int no_bitstream; | |
176 | ||
177 | 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) | |
178 | ||
179 | uint8_t *scratchbuf; | |
180 | uint8_t *emu_edge_buffer; | |
181 | }SnowContext; | |
182 | ||
183 | /* Tables */ | |
184 | extern const uint8_t * const ff_obmc_tab[4]; | |
185 | extern uint8_t ff_qexp[QROOT]; | |
186 | extern int ff_scale_mv_ref[MAX_REF_FRAMES][MAX_REF_FRAMES]; | |
187 | ||
188 | /* C bits used by mmx/sse2/altivec */ | |
189 | ||
190 | static av_always_inline void snow_interleave_line_header(int * i, int width, IDWTELEM * low, IDWTELEM * high){ | |
191 | (*i) = (width) - 2; | |
192 | ||
193 | if (width & 1){ | |
194 | low[(*i)+1] = low[((*i)+1)>>1]; | |
195 | (*i)--; | |
196 | } | |
197 | } | |
198 | ||
199 | static av_always_inline void snow_interleave_line_footer(int * i, IDWTELEM * low, IDWTELEM * high){ | |
200 | for (; (*i)>=0; (*i)-=2){ | |
201 | low[(*i)+1] = high[(*i)>>1]; | |
202 | low[*i] = low[(*i)>>1]; | |
203 | } | |
204 | } | |
205 | ||
206 | 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){ | |
207 | for(; i<w; i++){ | |
208 | dst[i] = src[i] - ((mul * (ref[i] + ref[i + 1]) + add) >> shift); | |
209 | } | |
210 | ||
211 | if((width^lift_high)&1){ | |
212 | dst[w] = src[w] - ((mul * 2 * ref[w] + add) >> shift); | |
213 | } | |
214 | } | |
215 | ||
216 | static av_always_inline void snow_horizontal_compose_liftS_lead_out(int i, IDWTELEM * dst, IDWTELEM * src, IDWTELEM * ref, int width, int w){ | |
217 | for(; i<w; i++){ | |
218 | dst[i] = src[i] + ((ref[i] + ref[(i+1)]+W_BO + 4 * src[i]) >> W_BS); | |
219 | } | |
220 | ||
221 | if(width&1){ | |
222 | dst[w] = src[w] + ((2 * ref[w] + W_BO + 4 * src[w]) >> W_BS); | |
223 | } | |
224 | } | |
225 | ||
226 | /* common code */ | |
227 | ||
228 | int ff_snow_common_init(AVCodecContext *avctx); | |
229 | int ff_snow_common_init_after_header(AVCodecContext *avctx); | |
230 | void ff_snow_common_end(SnowContext *s); | |
231 | void ff_snow_release_buffer(AVCodecContext *avctx); | |
232 | void ff_snow_reset_contexts(SnowContext *s); | |
233 | int ff_snow_alloc_blocks(SnowContext *s); | |
234 | int ff_snow_frame_start(SnowContext *s); | |
235 | void ff_snow_pred_block(SnowContext *s, uint8_t *dst, uint8_t *tmp, ptrdiff_t stride, | |
f6fa7814 | 236 | int sx, int sy, int b_w, int b_h, const BlockNode *block, |
2ba45a60 DM |
237 | int plane_index, int w, int h); |
238 | int ff_snow_get_buffer(SnowContext *s, AVFrame *frame); | |
239 | /* common inline functions */ | |
240 | //XXX doublecheck all of them should stay inlined | |
241 | ||
242 | 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){ | |
243 | const int w= s->b_width << s->block_max_depth; | |
244 | const int rem_depth= s->block_max_depth - level; | |
245 | const int index= (x + y*w) << rem_depth; | |
246 | const int block_w= 1<<rem_depth; | |
247 | BlockNode block; | |
248 | int i,j; | |
249 | ||
250 | block.color[0]= l; | |
251 | block.color[1]= cb; | |
252 | block.color[2]= cr; | |
253 | block.mx= mx; | |
254 | block.my= my; | |
255 | block.ref= ref; | |
256 | block.type= type; | |
257 | block.level= level; | |
258 | ||
259 | for(j=0; j<block_w; j++){ | |
260 | for(i=0; i<block_w; i++){ | |
261 | s->block[index + i + j*w]= block; | |
262 | } | |
263 | } | |
264 | } | |
265 | ||
266 | static inline void pred_mv(SnowContext *s, int *mx, int *my, int ref, | |
267 | const BlockNode *left, const BlockNode *top, const BlockNode *tr){ | |
268 | if(s->ref_frames == 1){ | |
269 | *mx = mid_pred(left->mx, top->mx, tr->mx); | |
270 | *my = mid_pred(left->my, top->my, tr->my); | |
271 | }else{ | |
272 | const int *scale = ff_scale_mv_ref[ref]; | |
273 | *mx = mid_pred((left->mx * scale[left->ref] + 128) >>8, | |
274 | (top ->mx * scale[top ->ref] + 128) >>8, | |
275 | (tr ->mx * scale[tr ->ref] + 128) >>8); | |
276 | *my = mid_pred((left->my * scale[left->ref] + 128) >>8, | |
277 | (top ->my * scale[top ->ref] + 128) >>8, | |
278 | (tr ->my * scale[tr ->ref] + 128) >>8); | |
279 | } | |
280 | } | |
281 | ||
282 | static av_always_inline int same_block(BlockNode *a, BlockNode *b){ | |
283 | if((a->type&BLOCK_INTRA) && (b->type&BLOCK_INTRA)){ | |
284 | return !((a->color[0] - b->color[0]) | (a->color[1] - b->color[1]) | (a->color[2] - b->color[2])); | |
285 | }else{ | |
286 | return !((a->mx - b->mx) | (a->my - b->my) | (a->ref - b->ref) | ((a->type ^ b->type)&BLOCK_INTRA)); | |
287 | } | |
288 | } | |
289 | ||
290 | //FIXME name cleanup (b_w, block_w, b_width stuff) | |
291 | //XXX should we really inline it? | |
292 | 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){ | |
293 | const int b_width = s->b_width << s->block_max_depth; | |
294 | const int b_height= s->b_height << s->block_max_depth; | |
295 | const int b_stride= b_width; | |
296 | BlockNode *lt= &s->block[b_x + b_y*b_stride]; | |
297 | BlockNode *rt= lt+1; | |
298 | BlockNode *lb= lt+b_stride; | |
299 | BlockNode *rb= lb+1; | |
300 | uint8_t *block[4]; | |
301 | int tmp_step= src_stride >= 7*MB_SIZE ? MB_SIZE : MB_SIZE*src_stride; | |
302 | uint8_t *tmp = s->scratchbuf; | |
303 | uint8_t *ptmp; | |
304 | int x,y; | |
305 | ||
306 | if(b_x<0){ | |
307 | lt= rt; | |
308 | lb= rb; | |
309 | }else if(b_x + 1 >= b_width){ | |
310 | rt= lt; | |
311 | rb= lb; | |
312 | } | |
313 | if(b_y<0){ | |
314 | lt= lb; | |
315 | rt= rb; | |
316 | }else if(b_y + 1 >= b_height){ | |
317 | lb= lt; | |
318 | rb= rt; | |
319 | } | |
320 | ||
321 | if(src_x<0){ //FIXME merge with prev & always round internal width up to *16 | |
322 | obmc -= src_x; | |
323 | b_w += src_x; | |
324 | if(!sliced && !offset_dst) | |
325 | dst -= src_x; | |
326 | src_x=0; | |
327 | } | |
328 | if(src_x + b_w > w){ | |
329 | b_w = w - src_x; | |
330 | } | |
331 | if(src_y<0){ | |
332 | obmc -= src_y*obmc_stride; | |
333 | b_h += src_y; | |
334 | if(!sliced && !offset_dst) | |
335 | dst -= src_y*dst_stride; | |
336 | src_y=0; | |
337 | } | |
338 | if(src_y + b_h> h){ | |
339 | b_h = h - src_y; | |
340 | } | |
341 | ||
342 | if(b_w<=0 || b_h<=0) return; | |
343 | ||
344 | av_assert2(src_stride > 2*MB_SIZE + 5); | |
345 | ||
346 | if(!sliced && offset_dst) | |
347 | dst += src_x + src_y*dst_stride; | |
348 | dst8+= src_x + src_y*src_stride; | |
349 | // src += src_x + src_y*src_stride; | |
350 | ||
351 | ptmp= tmp + 3*tmp_step; | |
352 | block[0]= ptmp; | |
353 | ptmp+=tmp_step; | |
354 | ff_snow_pred_block(s, block[0], tmp, src_stride, src_x, src_y, b_w, b_h, lt, plane_index, w, h); | |
355 | ||
356 | if(same_block(lt, rt)){ | |
357 | block[1]= block[0]; | |
358 | }else{ | |
359 | block[1]= ptmp; | |
360 | ptmp+=tmp_step; | |
361 | ff_snow_pred_block(s, block[1], tmp, src_stride, src_x, src_y, b_w, b_h, rt, plane_index, w, h); | |
362 | } | |
363 | ||
364 | if(same_block(lt, lb)){ | |
365 | block[2]= block[0]; | |
366 | }else if(same_block(rt, lb)){ | |
367 | block[2]= block[1]; | |
368 | }else{ | |
369 | block[2]= ptmp; | |
370 | ptmp+=tmp_step; | |
371 | ff_snow_pred_block(s, block[2], tmp, src_stride, src_x, src_y, b_w, b_h, lb, plane_index, w, h); | |
372 | } | |
373 | ||
374 | if(same_block(lt, rb) ){ | |
375 | block[3]= block[0]; | |
376 | }else if(same_block(rt, rb)){ | |
377 | block[3]= block[1]; | |
378 | }else if(same_block(lb, rb)){ | |
379 | block[3]= block[2]; | |
380 | }else{ | |
381 | block[3]= ptmp; | |
382 | ff_snow_pred_block(s, block[3], tmp, src_stride, src_x, src_y, b_w, b_h, rb, plane_index, w, h); | |
383 | } | |
384 | if(sliced){ | |
385 | s->dwt.inner_add_yblock(obmc, obmc_stride, block, b_w, b_h, src_x,src_y, src_stride, sb, add, dst8); | |
386 | }else{ | |
387 | for(y=0; y<b_h; y++){ | |
388 | //FIXME ugly misuse of obmc_stride | |
389 | const uint8_t *obmc1= obmc + y*obmc_stride; | |
390 | const uint8_t *obmc2= obmc1+ (obmc_stride>>1); | |
391 | const uint8_t *obmc3= obmc1+ obmc_stride*(obmc_stride>>1); | |
392 | const uint8_t *obmc4= obmc3+ (obmc_stride>>1); | |
393 | for(x=0; x<b_w; x++){ | |
394 | int v= obmc1[x] * block[3][x + y*src_stride] | |
395 | +obmc2[x] * block[2][x + y*src_stride] | |
396 | +obmc3[x] * block[1][x + y*src_stride] | |
397 | +obmc4[x] * block[0][x + y*src_stride]; | |
398 | ||
399 | v <<= 8 - LOG2_OBMC_MAX; | |
400 | if(FRAC_BITS != 8){ | |
401 | v >>= 8 - FRAC_BITS; | |
402 | } | |
403 | if(add){ | |
404 | v += dst[x + y*dst_stride]; | |
405 | v = (v + (1<<(FRAC_BITS-1))) >> FRAC_BITS; | |
406 | if(v&(~255)) v= ~(v>>31); | |
407 | dst8[x + y*src_stride] = v; | |
408 | }else{ | |
409 | dst[x + y*dst_stride] -= v; | |
410 | } | |
411 | } | |
412 | } | |
413 | } | |
414 | } | |
415 | ||
416 | static av_always_inline void predict_slice(SnowContext *s, IDWTELEM *buf, int plane_index, int add, int mb_y){ | |
417 | Plane *p= &s->plane[plane_index]; | |
418 | const int mb_w= s->b_width << s->block_max_depth; | |
419 | const int mb_h= s->b_height << s->block_max_depth; | |
420 | int x, y, mb_x; | |
421 | int block_size = MB_SIZE >> s->block_max_depth; | |
422 | int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size; | |
423 | int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size; | |
424 | const uint8_t *obmc = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth]; | |
425 | const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size; | |
426 | int ref_stride= s->current_picture->linesize[plane_index]; | |
427 | uint8_t *dst8= s->current_picture->data[plane_index]; | |
428 | int w= p->width; | |
429 | int h= p->height; | |
430 | av_assert2(s->chroma_h_shift == s->chroma_v_shift); // obmc params assume squares | |
431 | if(s->keyframe || (s->avctx->debug&512)){ | |
432 | if(mb_y==mb_h) | |
433 | return; | |
434 | ||
435 | if(add){ | |
436 | for(y=block_h*mb_y; y<FFMIN(h,block_h*(mb_y+1)); y++){ | |
437 | for(x=0; x<w; x++){ | |
438 | int v= buf[x + y*w] + (128<<FRAC_BITS) + (1<<(FRAC_BITS-1)); | |
439 | v >>= FRAC_BITS; | |
440 | if(v&(~255)) v= ~(v>>31); | |
441 | dst8[x + y*ref_stride]= v; | |
442 | } | |
443 | } | |
444 | }else{ | |
445 | for(y=block_h*mb_y; y<FFMIN(h,block_h*(mb_y+1)); y++){ | |
446 | for(x=0; x<w; x++){ | |
447 | buf[x + y*w]-= 128<<FRAC_BITS; | |
448 | } | |
449 | } | |
450 | } | |
451 | ||
452 | return; | |
453 | } | |
454 | ||
455 | for(mb_x=0; mb_x<=mb_w; mb_x++){ | |
456 | add_yblock(s, 0, NULL, buf, dst8, obmc, | |
457 | block_w*mb_x - block_w/2, | |
458 | block_h*mb_y - block_h/2, | |
459 | block_w, block_h, | |
460 | w, h, | |
461 | w, ref_stride, obmc_stride, | |
462 | mb_x - 1, mb_y - 1, | |
463 | add, 1, plane_index); | |
464 | } | |
465 | } | |
466 | ||
467 | static av_always_inline void predict_plane(SnowContext *s, IDWTELEM *buf, int plane_index, int add){ | |
468 | const int mb_h= s->b_height << s->block_max_depth; | |
469 | int mb_y; | |
470 | for(mb_y=0; mb_y<=mb_h; mb_y++) | |
471 | predict_slice(s, buf, plane_index, add, mb_y); | |
472 | } | |
473 | ||
474 | 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){ | |
475 | const int w= s->b_width << s->block_max_depth; | |
476 | const int rem_depth= s->block_max_depth - level; | |
477 | const int index= (x + y*w) << rem_depth; | |
478 | const int block_w= 1<<rem_depth; | |
479 | const int block_h= 1<<rem_depth; //FIXME "w!=h" | |
480 | BlockNode block; | |
481 | int i,j; | |
482 | ||
483 | block.color[0]= l; | |
484 | block.color[1]= cb; | |
485 | block.color[2]= cr; | |
486 | block.mx= mx; | |
487 | block.my= my; | |
488 | block.ref= ref; | |
489 | block.type= type; | |
490 | block.level= level; | |
491 | ||
492 | for(j=0; j<block_h; j++){ | |
493 | for(i=0; i<block_w; i++){ | |
494 | s->block[index + i + j*w]= block; | |
495 | } | |
496 | } | |
497 | } | |
498 | ||
499 | 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){ | |
500 | SnowContext *s = c->avctx->priv_data; | |
501 | const int offset[3]= { | |
502 | y*c-> stride + x, | |
503 | ((y*c->uvstride + x)>>s->chroma_h_shift), | |
504 | ((y*c->uvstride + x)>>s->chroma_h_shift), | |
505 | }; | |
506 | int i; | |
507 | for(i=0; i<3; i++){ | |
508 | c->src[0][i]= src [i]; | |
509 | c->ref[0][i]= ref [i] + offset[i]; | |
510 | } | |
511 | av_assert2(!ref_index); | |
512 | } | |
513 | ||
514 | ||
515 | /* bitstream functions */ | |
516 | ||
517 | extern const int8_t ff_quant3bA[256]; | |
518 | ||
519 | #define QEXPSHIFT (7-FRAC_BITS+8) //FIXME try to change this to 0 | |
520 | ||
521 | static inline void put_symbol(RangeCoder *c, uint8_t *state, int v, int is_signed){ | |
522 | int i; | |
523 | ||
524 | if(v){ | |
525 | const int a= FFABS(v); | |
526 | const int e= av_log2(a); | |
527 | const int el= FFMIN(e, 10); | |
528 | put_rac(c, state+0, 0); | |
529 | ||
530 | for(i=0; i<el; i++){ | |
531 | put_rac(c, state+1+i, 1); //1..10 | |
532 | } | |
533 | for(; i<e; i++){ | |
534 | put_rac(c, state+1+9, 1); //1..10 | |
535 | } | |
536 | put_rac(c, state+1+FFMIN(i,9), 0); | |
537 | ||
538 | for(i=e-1; i>=el; i--){ | |
539 | put_rac(c, state+22+9, (a>>i)&1); //22..31 | |
540 | } | |
541 | for(; i>=0; i--){ | |
542 | put_rac(c, state+22+i, (a>>i)&1); //22..31 | |
543 | } | |
544 | ||
545 | if(is_signed) | |
546 | put_rac(c, state+11 + el, v < 0); //11..21 | |
547 | }else{ | |
548 | put_rac(c, state+0, 1); | |
549 | } | |
550 | } | |
551 | ||
552 | static inline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed){ | |
553 | if(get_rac(c, state+0)) | |
554 | return 0; | |
555 | else{ | |
556 | int i, e, a; | |
557 | e= 0; | |
558 | while(get_rac(c, state+1 + FFMIN(e,9))){ //1..10 | |
559 | e++; | |
560 | } | |
561 | ||
562 | a= 1; | |
563 | for(i=e-1; i>=0; i--){ | |
564 | a += a + get_rac(c, state+22 + FFMIN(i,9)); //22..31 | |
565 | } | |
566 | ||
567 | e= -(is_signed && get_rac(c, state+11 + FFMIN(e,10))); //11..21 | |
568 | return (a^e)-e; | |
569 | } | |
570 | } | |
571 | ||
572 | static inline void put_symbol2(RangeCoder *c, uint8_t *state, int v, int log2){ | |
573 | int i; | |
574 | int r= log2>=0 ? 1<<log2 : 1; | |
575 | ||
576 | av_assert2(v>=0); | |
577 | av_assert2(log2>=-4); | |
578 | ||
579 | while(v >= r){ | |
580 | put_rac(c, state+4+log2, 1); | |
581 | v -= r; | |
582 | log2++; | |
583 | if(log2>0) r+=r; | |
584 | } | |
585 | put_rac(c, state+4+log2, 0); | |
586 | ||
587 | for(i=log2-1; i>=0; i--){ | |
588 | put_rac(c, state+31-i, (v>>i)&1); | |
589 | } | |
590 | } | |
591 | ||
592 | static inline int get_symbol2(RangeCoder *c, uint8_t *state, int log2){ | |
593 | int i; | |
594 | int r= log2>=0 ? 1<<log2 : 1; | |
595 | int v=0; | |
596 | ||
597 | av_assert2(log2>=-4); | |
598 | ||
599 | while(log2<28 && get_rac(c, state+4+log2)){ | |
600 | v+= r; | |
601 | log2++; | |
602 | if(log2>0) r+=r; | |
603 | } | |
604 | ||
605 | for(i=log2-1; i>=0; i--){ | |
606 | v+= get_rac(c, state+31-i)<<i; | |
607 | } | |
608 | ||
609 | return v; | |
610 | } | |
611 | ||
612 | static inline void unpack_coeffs(SnowContext *s, SubBand *b, SubBand * parent, int orientation){ | |
613 | const int w= b->width; | |
614 | const int h= b->height; | |
615 | int x,y; | |
616 | ||
617 | int run, runs; | |
618 | x_and_coeff *xc= b->x_coeff; | |
619 | x_and_coeff *prev_xc= NULL; | |
620 | x_and_coeff *prev2_xc= xc; | |
621 | x_and_coeff *parent_xc= parent ? parent->x_coeff : NULL; | |
622 | x_and_coeff *prev_parent_xc= parent_xc; | |
623 | ||
624 | runs= get_symbol2(&s->c, b->state[30], 0); | |
625 | if(runs-- > 0) run= get_symbol2(&s->c, b->state[1], 3); | |
626 | else run= INT_MAX; | |
627 | ||
628 | for(y=0; y<h; y++){ | |
629 | int v=0; | |
630 | int lt=0, t=0, rt=0; | |
631 | ||
632 | if(y && prev_xc->x == 0){ | |
633 | rt= prev_xc->coeff; | |
634 | } | |
635 | for(x=0; x<w; x++){ | |
636 | int p=0; | |
637 | const int l= v; | |
638 | ||
639 | lt= t; t= rt; | |
640 | ||
641 | if(y){ | |
642 | if(prev_xc->x <= x) | |
643 | prev_xc++; | |
644 | if(prev_xc->x == x + 1) | |
645 | rt= prev_xc->coeff; | |
646 | else | |
647 | rt=0; | |
648 | } | |
649 | if(parent_xc){ | |
650 | if(x>>1 > parent_xc->x){ | |
651 | parent_xc++; | |
652 | } | |
653 | if(x>>1 == parent_xc->x){ | |
654 | p= parent_xc->coeff; | |
655 | } | |
656 | } | |
657 | if(/*ll|*/l|lt|t|rt|p){ | |
658 | int context= av_log2(/*FFABS(ll) + */3*(l>>1) + (lt>>1) + (t&~1) + (rt>>1) + (p>>1)); | |
659 | ||
660 | v=get_rac(&s->c, &b->state[0][context]); | |
661 | if(v){ | |
662 | v= 2*(get_symbol2(&s->c, b->state[context + 2], context-4) + 1); | |
663 | v+=get_rac(&s->c, &b->state[0][16 + 1 + 3 + ff_quant3bA[l&0xFF] + 3*ff_quant3bA[t&0xFF]]); | |
664 | if ((uint16_t)v != v) { | |
665 | av_log(s->avctx, AV_LOG_ERROR, "Coefficient damaged\n"); | |
666 | v = 1; | |
667 | } | |
668 | xc->x=x; | |
669 | (xc++)->coeff= v; | |
670 | } | |
671 | }else{ | |
672 | if(!run){ | |
673 | if(runs-- > 0) run= get_symbol2(&s->c, b->state[1], 3); | |
674 | else run= INT_MAX; | |
675 | v= 2*(get_symbol2(&s->c, b->state[0 + 2], 0-4) + 1); | |
676 | v+=get_rac(&s->c, &b->state[0][16 + 1 + 3]); | |
677 | if ((uint16_t)v != v) { | |
678 | av_log(s->avctx, AV_LOG_ERROR, "Coefficient damaged\n"); | |
679 | v = 1; | |
680 | } | |
681 | ||
682 | xc->x=x; | |
683 | (xc++)->coeff= v; | |
684 | }else{ | |
685 | int max_run; | |
686 | run--; | |
687 | v=0; | |
688 | av_assert2(run >= 0); | |
689 | if(y) max_run= FFMIN(run, prev_xc->x - x - 2); | |
690 | else max_run= FFMIN(run, w-x-1); | |
691 | if(parent_xc) | |
692 | max_run= FFMIN(max_run, 2*parent_xc->x - x - 1); | |
693 | av_assert2(max_run >= 0 && max_run <= run); | |
694 | ||
695 | x+= max_run; | |
696 | run-= max_run; | |
697 | } | |
698 | } | |
699 | } | |
700 | (xc++)->x= w+1; //end marker | |
701 | prev_xc= prev2_xc; | |
702 | prev2_xc= xc; | |
703 | ||
704 | if(parent_xc){ | |
705 | if(y&1){ | |
706 | while(parent_xc->x != parent->width+1) | |
707 | parent_xc++; | |
708 | parent_xc++; | |
709 | prev_parent_xc= parent_xc; | |
710 | }else{ | |
711 | parent_xc= prev_parent_xc; | |
712 | } | |
713 | } | |
714 | } | |
715 | ||
716 | (xc++)->x= w+1; //end marker | |
717 | } | |
718 | ||
719 | #endif /* AVCODEC_SNOW_H */ |