Go to most recent revision | Details | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
4349 | Serge | 1 | /* |
2 | * Copyright (C) 2004 Michael Niedermayer |
||
3 | * Copyright (C) 2006 Robert Edele |
||
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 "dsputil.h" |
||
26 | #include "hpeldsp.h" |
||
27 | #include "snow_dwt.h" |
||
28 | |||
29 | #include "rangecoder.h" |
||
30 | #include "mathops.h" |
||
31 | #include "mpegvideo.h" |
||
32 | #include "h264qpel.h" |
||
33 | |||
34 | #define MID_STATE 128 |
||
35 | |||
36 | #define MAX_PLANES 4 |
||
37 | #define QSHIFT 5 |
||
38 | #define QROOT (1< |
||
39 | #define LOSSLESS_QLOG -128 |
||
40 | #define FRAC_BITS 4 |
||
41 | #define MAX_REF_FRAMES 8 |
||
42 | |||
43 | #define LOG2_OBMC_MAX 8 |
||
44 | #define OBMC_MAX (1<<(LOG2_OBMC_MAX)) |
||
45 | typedef struct BlockNode{ |
||
46 | int16_t mx; |
||
47 | int16_t my; |
||
48 | uint8_t ref; |
||
49 | uint8_t color[3]; |
||
50 | uint8_t type; |
||
51 | //#define TYPE_SPLIT 1 |
||
52 | #define BLOCK_INTRA 1 |
||
53 | #define BLOCK_OPT 2 |
||
54 | //#define TYPE_NOCOLOR 4 |
||
55 | uint8_t level; //FIXME merge into type? |
||
56 | }BlockNode; |
||
57 | |||
58 | static const BlockNode null_block= { //FIXME add border maybe |
||
59 | .color= {128,128,128}, |
||
60 | .mx= 0, |
||
61 | .my= 0, |
||
62 | .ref= 0, |
||
63 | .type= 0, |
||
64 | .level= 0, |
||
65 | }; |
||
66 | |||
67 | #define LOG2_MB_SIZE 4 |
||
68 | #define MB_SIZE (1< |
||
69 | #define ENCODER_EXTRA_BITS 4 |
||
70 | #define HTAPS_MAX 8 |
||
71 | |||
72 | typedef struct x_and_coeff{ |
||
73 | int16_t x; |
||
74 | uint16_t coeff; |
||
75 | } x_and_coeff; |
||
76 | |||
77 | typedef struct SubBand{ |
||
78 | int level; |
||
79 | int stride; |
||
80 | int width; |
||
81 | int height; |
||
82 | int qlog; ///< log(qscale)/log[2^(1/6)] |
||
83 | DWTELEM *buf; |
||
84 | IDWTELEM *ibuf; |
||
85 | int buf_x_offset; |
||
86 | int buf_y_offset; |
||
87 | int stride_line; ///< Stride measured in lines, not pixels. |
||
88 | x_and_coeff * x_coeff; |
||
89 | struct SubBand *parent; |
||
90 | uint8_t state[/*7*2*/ 7 + 512][32]; |
||
91 | }SubBand; |
||
92 | |||
93 | typedef struct Plane{ |
||
94 | int width; |
||
95 | int height; |
||
96 | SubBand band[MAX_DECOMPOSITIONS][4]; |
||
97 | |||
98 | int htaps; |
||
99 | int8_t hcoeff[HTAPS_MAX/2]; |
||
100 | int diag_mc; |
||
101 | int fast_mc; |
||
102 | |||
103 | int last_htaps; |
||
104 | int8_t last_hcoeff[HTAPS_MAX/2]; |
||
105 | int last_diag_mc; |
||
106 | }Plane; |
||
107 | |||
108 | typedef struct SnowContext{ |
||
109 | AVClass *class; |
||
110 | AVCodecContext *avctx; |
||
111 | RangeCoder c; |
||
112 | DSPContext dsp; |
||
113 | HpelDSPContext hdsp; |
||
114 | VideoDSPContext vdsp; |
||
115 | H264QpelContext h264qpel; |
||
116 | SnowDWTContext dwt; |
||
117 | AVFrame *new_picture; |
||
118 | AVFrame *input_picture; ///< new_picture with the internal linesizes |
||
119 | AVFrame *current_picture; |
||
120 | AVFrame *last_picture[MAX_REF_FRAMES]; |
||
121 | uint8_t *halfpel_plane[MAX_REF_FRAMES][4][4]; |
||
122 | AVFrame *mconly_picture; |
||
123 | // uint8_t q_context[16]; |
||
124 | uint8_t header_state[32]; |
||
125 | uint8_t block_state[128 + 32*128]; |
||
126 | int keyframe; |
||
127 | int always_reset; |
||
128 | int version; |
||
129 | int spatial_decomposition_type; |
||
130 | int last_spatial_decomposition_type; |
||
131 | int temporal_decomposition_type; |
||
132 | int spatial_decomposition_count; |
||
133 | int last_spatial_decomposition_count; |
||
134 | int temporal_decomposition_count; |
||
135 | int max_ref_frames; |
||
136 | int ref_frames; |
||
137 | int16_t (*ref_mvs[MAX_REF_FRAMES])[2]; |
||
138 | uint32_t *ref_scores[MAX_REF_FRAMES]; |
||
139 | DWTELEM *spatial_dwt_buffer; |
||
140 | DWTELEM *temp_dwt_buffer; |
||
141 | IDWTELEM *spatial_idwt_buffer; |
||
142 | IDWTELEM *temp_idwt_buffer; |
||
143 | int *run_buffer; |
||
144 | int colorspace_type; |
||
145 | int chroma_h_shift; |
||
146 | int chroma_v_shift; |
||
147 | int spatial_scalability; |
||
148 | int qlog; |
||
149 | int last_qlog; |
||
150 | int lambda; |
||
151 | int lambda2; |
||
152 | int pass1_rc; |
||
153 | int mv_scale; |
||
154 | int last_mv_scale; |
||
155 | int qbias; |
||
156 | int last_qbias; |
||
157 | #define QBIAS_SHIFT 3 |
||
158 | int b_width; |
||
159 | int b_height; |
||
160 | int block_max_depth; |
||
161 | int last_block_max_depth; |
||
162 | int nb_planes; |
||
163 | Plane plane[MAX_PLANES]; |
||
164 | BlockNode *block; |
||
165 | #define ME_CACHE_SIZE 1024 |
||
166 | unsigned me_cache[ME_CACHE_SIZE]; |
||
167 | unsigned me_cache_generation; |
||
168 | slice_buffer sb; |
||
169 | int memc_only; |
||
170 | int no_bitstream; |
||
171 | |||
172 | 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) |
||
173 | |||
174 | uint8_t *scratchbuf; |
||
175 | uint8_t *emu_edge_buffer; |
||
176 | }SnowContext; |
||
177 | |||
178 | /* Tables */ |
||
179 | extern const uint8_t * const ff_obmc_tab[4]; |
||
180 | extern uint8_t ff_qexp[QROOT]; |
||
181 | extern int ff_scale_mv_ref[MAX_REF_FRAMES][MAX_REF_FRAMES]; |
||
182 | |||
183 | /* C bits used by mmx/sse2/altivec */ |
||
184 | |||
185 | static av_always_inline void snow_interleave_line_header(int * i, int width, IDWTELEM * low, IDWTELEM * high){ |
||
186 | (*i) = (width) - 2; |
||
187 | |||
188 | if (width & 1){ |
||
189 | low[(*i)+1] = low[((*i)+1)>>1]; |
||
190 | (*i)--; |
||
191 | } |
||
192 | } |
||
193 | |||
194 | static av_always_inline void snow_interleave_line_footer(int * i, IDWTELEM * low, IDWTELEM * high){ |
||
195 | for (; (*i)>=0; (*i)-=2){ |
||
196 | low[(*i)+1] = high[(*i)>>1]; |
||
197 | low[*i] = low[(*i)>>1]; |
||
198 | } |
||
199 | } |
||
200 | |||
201 | 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){ |
||
202 | for(; i |
||
203 | dst[i] = src[i] - ((mul * (ref[i] + ref[i + 1]) + add) >> shift); |
||
204 | } |
||
205 | |||
206 | if((width^lift_high)&1){ |
||
207 | dst[w] = src[w] - ((mul * 2 * ref[w] + add) >> shift); |
||
208 | } |
||
209 | } |
||
210 | |||
211 | static av_always_inline void snow_horizontal_compose_liftS_lead_out(int i, IDWTELEM * dst, IDWTELEM * src, IDWTELEM * ref, int width, int w){ |
||
212 | for(; i |
||
213 | dst[i] = src[i] + ((ref[i] + ref[(i+1)]+W_BO + 4 * src[i]) >> W_BS); |
||
214 | } |
||
215 | |||
216 | if(width&1){ |
||
217 | dst[w] = src[w] + ((2 * ref[w] + W_BO + 4 * src[w]) >> W_BS); |
||
218 | } |
||
219 | } |
||
220 | |||
221 | /* common code */ |
||
222 | |||
223 | int ff_snow_common_init(AVCodecContext *avctx); |
||
224 | int ff_snow_common_init_after_header(AVCodecContext *avctx); |
||
225 | void ff_snow_common_end(SnowContext *s); |
||
226 | void ff_snow_release_buffer(AVCodecContext *avctx); |
||
227 | void ff_snow_reset_contexts(SnowContext *s); |
||
228 | int ff_snow_alloc_blocks(SnowContext *s); |
||
229 | int ff_snow_frame_start(SnowContext *s); |
||
230 | void ff_snow_pred_block(SnowContext *s, uint8_t *dst, uint8_t *tmp, ptrdiff_t stride, |
||
231 | int sx, int sy, int b_w, int b_h, BlockNode *block, |
||
232 | int plane_index, int w, int h); |
||
233 | /* common inline functions */ |
||
234 | //XXX doublecheck all of them should stay inlined |
||
235 | |||
236 | 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){ |
||
237 | const int w= s->b_width << s->block_max_depth; |
||
238 | const int rem_depth= s->block_max_depth - level; |
||
239 | const int index= (x + y*w) << rem_depth; |
||
240 | const int block_w= 1< |
||
241 | BlockNode block; |
||
242 | int i,j; |
||
243 | |||
244 | block.color[0]= l; |
||
245 | block.color[1]= cb; |
||
246 | block.color[2]= cr; |
||
247 | block.mx= mx; |
||
248 | block.my= my; |
||
249 | block.ref= ref; |
||
250 | block.type= type; |
||
251 | block.level= level; |
||
252 | |||
253 | for(j=0; j |
||
254 | for(i=0; i |
||
255 | s->block[index + i + j*w]= block; |
||
256 | } |
||
257 | } |
||
258 | } |
||
259 | |||
260 | static inline void pred_mv(SnowContext *s, int *mx, int *my, int ref, |
||
261 | const BlockNode *left, const BlockNode *top, const BlockNode *tr){ |
||
262 | if(s->ref_frames == 1){ |
||
263 | *mx = mid_pred(left->mx, top->mx, tr->mx); |
||
264 | *my = mid_pred(left->my, top->my, tr->my); |
||
265 | }else{ |
||
266 | const int *scale = ff_scale_mv_ref[ref]; |
||
267 | *mx = mid_pred((left->mx * scale[left->ref] + 128) >>8, |
||
268 | (top ->mx * scale[top ->ref] + 128) >>8, |
||
269 | (tr ->mx * scale[tr ->ref] + 128) >>8); |
||
270 | *my = mid_pred((left->my * scale[left->ref] + 128) >>8, |
||
271 | (top ->my * scale[top ->ref] + 128) >>8, |
||
272 | (tr ->my * scale[tr ->ref] + 128) >>8); |
||
273 | } |
||
274 | } |
||
275 | |||
276 | static av_always_inline int same_block(BlockNode *a, BlockNode *b){ |
||
277 | if((a->type&BLOCK_INTRA) && (b->type&BLOCK_INTRA)){ |
||
278 | return !((a->color[0] - b->color[0]) | (a->color[1] - b->color[1]) | (a->color[2] - b->color[2])); |
||
279 | }else{ |
||
280 | return !((a->mx - b->mx) | (a->my - b->my) | (a->ref - b->ref) | ((a->type ^ b->type)&BLOCK_INTRA)); |
||
281 | } |
||
282 | } |
||
283 | |||
284 | //FIXME name cleanup (b_w, block_w, b_width stuff) |
||
285 | //XXX should we really inline it? |
||
286 | 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){ |
||
287 | const int b_width = s->b_width << s->block_max_depth; |
||
288 | const int b_height= s->b_height << s->block_max_depth; |
||
289 | const int b_stride= b_width; |
||
290 | BlockNode *lt= &s->block[b_x + b_y*b_stride]; |
||
291 | BlockNode *rt= lt+1; |
||
292 | BlockNode *lb= lt+b_stride; |
||
293 | BlockNode *rb= lb+1; |
||
294 | uint8_t *block[4]; |
||
295 | int tmp_step= src_stride >= 7*MB_SIZE ? MB_SIZE : MB_SIZE*src_stride; |
||
296 | uint8_t *tmp = s->scratchbuf; |
||
297 | uint8_t *ptmp; |
||
298 | int x,y; |
||
299 | |||
300 | if(b_x<0){ |
||
301 | lt= rt; |
||
302 | lb= rb; |
||
303 | }else if(b_x + 1 >= b_width){ |
||
304 | rt= lt; |
||
305 | rb= lb; |
||
306 | } |
||
307 | if(b_y<0){ |
||
308 | lt= lb; |
||
309 | rt= rb; |
||
310 | }else if(b_y + 1 >= b_height){ |
||
311 | lb= lt; |
||
312 | rb= rt; |
||
313 | } |
||
314 | |||
315 | if(src_x<0){ //FIXME merge with prev & always round internal width up to *16 |
||
316 | obmc -= src_x; |
||
317 | b_w += src_x; |
||
318 | if(!sliced && !offset_dst) |
||
319 | dst -= src_x; |
||
320 | src_x=0; |
||
321 | }else if(src_x + b_w > w){ |
||
322 | b_w = w - src_x; |
||
323 | } |
||
324 | if(src_y<0){ |
||
325 | obmc -= src_y*obmc_stride; |
||
326 | b_h += src_y; |
||
327 | if(!sliced && !offset_dst) |
||
328 | dst -= src_y*dst_stride; |
||
329 | src_y=0; |
||
330 | }else if(src_y + b_h> h){ |
||
331 | b_h = h - src_y; |
||
332 | } |
||
333 | |||
334 | if(b_w<=0 || b_h<=0) return; |
||
335 | |||
336 | av_assert2(src_stride > 2*MB_SIZE + 5); |
||
337 | |||
338 | if(!sliced && offset_dst) |
||
339 | dst += src_x + src_y*dst_stride; |
||
340 | dst8+= src_x + src_y*src_stride; |
||
341 | // src += src_x + src_y*src_stride; |
||
342 | |||
343 | ptmp= tmp + 3*tmp_step; |
||
344 | block[0]= ptmp; |
||
345 | ptmp+=tmp_step; |
||
346 | ff_snow_pred_block(s, block[0], tmp, src_stride, src_x, src_y, b_w, b_h, lt, plane_index, w, h); |
||
347 | |||
348 | if(same_block(lt, rt)){ |
||
349 | block[1]= block[0]; |
||
350 | }else{ |
||
351 | block[1]= ptmp; |
||
352 | ptmp+=tmp_step; |
||
353 | ff_snow_pred_block(s, block[1], tmp, src_stride, src_x, src_y, b_w, b_h, rt, plane_index, w, h); |
||
354 | } |
||
355 | |||
356 | if(same_block(lt, lb)){ |
||
357 | block[2]= block[0]; |
||
358 | }else if(same_block(rt, lb)){ |
||
359 | block[2]= block[1]; |
||
360 | }else{ |
||
361 | block[2]= ptmp; |
||
362 | ptmp+=tmp_step; |
||
363 | ff_snow_pred_block(s, block[2], tmp, src_stride, src_x, src_y, b_w, b_h, lb, plane_index, w, h); |
||
364 | } |
||
365 | |||
366 | if(same_block(lt, rb) ){ |
||
367 | block[3]= block[0]; |
||
368 | }else if(same_block(rt, rb)){ |
||
369 | block[3]= block[1]; |
||
370 | }else if(same_block(lb, rb)){ |
||
371 | block[3]= block[2]; |
||
372 | }else{ |
||
373 | block[3]= ptmp; |
||
374 | ff_snow_pred_block(s, block[3], tmp, src_stride, src_x, src_y, b_w, b_h, rb, plane_index, w, h); |
||
375 | } |
||
376 | if(sliced){ |
||
377 | s->dwt.inner_add_yblock(obmc, obmc_stride, block, b_w, b_h, src_x,src_y, src_stride, sb, add, dst8); |
||
378 | }else{ |
||
379 | for(y=0; y |
||
380 | //FIXME ugly misuse of obmc_stride |
||
381 | const uint8_t *obmc1= obmc + y*obmc_stride; |
||
382 | const uint8_t *obmc2= obmc1+ (obmc_stride>>1); |
||
383 | const uint8_t *obmc3= obmc1+ obmc_stride*(obmc_stride>>1); |
||
384 | const uint8_t *obmc4= obmc3+ (obmc_stride>>1); |
||
385 | for(x=0; x |
||
386 | int v= obmc1[x] * block[3][x + y*src_stride] |
||
387 | +obmc2[x] * block[2][x + y*src_stride] |
||
388 | +obmc3[x] * block[1][x + y*src_stride] |
||
389 | +obmc4[x] * block[0][x + y*src_stride]; |
||
390 | |||
391 | v <<= 8 - LOG2_OBMC_MAX; |
||
392 | if(FRAC_BITS != 8){ |
||
393 | v >>= 8 - FRAC_BITS; |
||
394 | } |
||
395 | if(add){ |
||
396 | v += dst[x + y*dst_stride]; |
||
397 | v = (v + (1<<(FRAC_BITS-1))) >> FRAC_BITS; |
||
398 | if(v&(~255)) v= ~(v>>31); |
||
399 | dst8[x + y*src_stride] = v; |
||
400 | }else{ |
||
401 | dst[x + y*dst_stride] -= v; |
||
402 | } |
||
403 | } |
||
404 | } |
||
405 | } |
||
406 | } |
||
407 | |||
408 | static av_always_inline void predict_slice(SnowContext *s, IDWTELEM *buf, int plane_index, int add, int mb_y){ |
||
409 | Plane *p= &s->plane[plane_index]; |
||
410 | const int mb_w= s->b_width << s->block_max_depth; |
||
411 | const int mb_h= s->b_height << s->block_max_depth; |
||
412 | int x, y, mb_x; |
||
413 | int block_size = MB_SIZE >> s->block_max_depth; |
||
414 | int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size; |
||
415 | int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size; |
||
416 | const uint8_t *obmc = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth]; |
||
417 | const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size; |
||
418 | int ref_stride= s->current_picture->linesize[plane_index]; |
||
419 | uint8_t *dst8= s->current_picture->data[plane_index]; |
||
420 | int w= p->width; |
||
421 | int h= p->height; |
||
422 | av_assert2(s->chroma_h_shift == s->chroma_v_shift); // obmc params assume squares |
||
423 | if(s->keyframe || (s->avctx->debug&512)){ |
||
424 | if(mb_y==mb_h) |
||
425 | return; |
||
426 | |||
427 | if(add){ |
||
428 | for(y=block_h*mb_y; y |
||
429 | for(x=0; x |
||
430 | int v= buf[x + y*w] + (128< |
||
431 | v >>= FRAC_BITS; |
||
432 | if(v&(~255)) v= ~(v>>31); |
||
433 | dst8[x + y*ref_stride]= v; |
||
434 | } |
||
435 | } |
||
436 | }else{ |
||
437 | for(y=block_h*mb_y; y |
||
438 | for(x=0; x |
||
439 | buf[x + y*w]-= 128< |
||
440 | } |
||
441 | } |
||
442 | } |
||
443 | |||
444 | return; |
||
445 | } |
||
446 | |||
447 | for(mb_x=0; mb_x<=mb_w; mb_x++){ |
||
448 | add_yblock(s, 0, NULL, buf, dst8, obmc, |
||
449 | block_w*mb_x - block_w/2, |
||
450 | block_h*mb_y - block_h/2, |
||
451 | block_w, block_h, |
||
452 | w, h, |
||
453 | w, ref_stride, obmc_stride, |
||
454 | mb_x - 1, mb_y - 1, |
||
455 | add, 1, plane_index); |
||
456 | } |
||
457 | } |
||
458 | |||
459 | static av_always_inline void predict_plane(SnowContext *s, IDWTELEM *buf, int plane_index, int add){ |
||
460 | const int mb_h= s->b_height << s->block_max_depth; |
||
461 | int mb_y; |
||
462 | for(mb_y=0; mb_y<=mb_h; mb_y++) |
||
463 | predict_slice(s, buf, plane_index, add, mb_y); |
||
464 | } |
||
465 | |||
466 | 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){ |
||
467 | const int w= s->b_width << s->block_max_depth; |
||
468 | const int rem_depth= s->block_max_depth - level; |
||
469 | const int index= (x + y*w) << rem_depth; |
||
470 | const int block_w= 1< |
||
471 | const int block_h= 1< |
||
472 | BlockNode block; |
||
473 | int i,j; |
||
474 | |||
475 | block.color[0]= l; |
||
476 | block.color[1]= cb; |
||
477 | block.color[2]= cr; |
||
478 | block.mx= mx; |
||
479 | block.my= my; |
||
480 | block.ref= ref; |
||
481 | block.type= type; |
||
482 | block.level= level; |
||
483 | |||
484 | for(j=0; j |
||
485 | for(i=0; i |
||
486 | s->block[index + i + j*w]= block; |
||
487 | } |
||
488 | } |
||
489 | } |
||
490 | |||
491 | 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){ |
||
492 | SnowContext *s = c->avctx->priv_data; |
||
493 | const int offset[3]= { |
||
494 | y*c-> stride + x, |
||
495 | ((y*c->uvstride + x)>>s->chroma_h_shift), |
||
496 | ((y*c->uvstride + x)>>s->chroma_h_shift), |
||
497 | }; |
||
498 | int i; |
||
499 | for(i=0; i<3; i++){ |
||
500 | c->src[0][i]= src [i]; |
||
501 | c->ref[0][i]= ref [i] + offset[i]; |
||
502 | } |
||
503 | av_assert2(!ref_index); |
||
504 | } |
||
505 | |||
506 | |||
507 | /* bitstream functions */ |
||
508 | |||
509 | extern const int8_t ff_quant3bA[256]; |
||
510 | |||
511 | #define QEXPSHIFT (7-FRAC_BITS+8) //FIXME try to change this to 0 |
||
512 | |||
513 | static inline void put_symbol(RangeCoder *c, uint8_t *state, int v, int is_signed){ |
||
514 | int i; |
||
515 | |||
516 | if(v){ |
||
517 | const int a= FFABS(v); |
||
518 | const int e= av_log2(a); |
||
519 | const int el= FFMIN(e, 10); |
||
520 | put_rac(c, state+0, 0); |
||
521 | |||
522 | for(i=0; i |
||
523 | put_rac(c, state+1+i, 1); //1..10 |
||
524 | } |
||
525 | for(; i |
||
526 | put_rac(c, state+1+9, 1); //1..10 |
||
527 | } |
||
528 | put_rac(c, state+1+FFMIN(i,9), 0); |
||
529 | |||
530 | for(i=e-1; i>=el; i--){ |
||
531 | put_rac(c, state+22+9, (a>>i)&1); //22..31 |
||
532 | } |
||
533 | for(; i>=0; i--){ |
||
534 | put_rac(c, state+22+i, (a>>i)&1); //22..31 |
||
535 | } |
||
536 | |||
537 | if(is_signed) |
||
538 | put_rac(c, state+11 + el, v < 0); //11..21 |
||
539 | }else{ |
||
540 | put_rac(c, state+0, 1); |
||
541 | } |
||
542 | } |
||
543 | |||
544 | static inline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed){ |
||
545 | if(get_rac(c, state+0)) |
||
546 | return 0; |
||
547 | else{ |
||
548 | int i, e, a; |
||
549 | e= 0; |
||
550 | while(get_rac(c, state+1 + FFMIN(e,9))){ //1..10 |
||
551 | e++; |
||
552 | } |
||
553 | |||
554 | a= 1; |
||
555 | for(i=e-1; i>=0; i--){ |
||
556 | a += a + get_rac(c, state+22 + FFMIN(i,9)); //22..31 |
||
557 | } |
||
558 | |||
559 | e= -(is_signed && get_rac(c, state+11 + FFMIN(e,10))); //11..21 |
||
560 | return (a^e)-e; |
||
561 | } |
||
562 | } |
||
563 | |||
564 | static inline void put_symbol2(RangeCoder *c, uint8_t *state, int v, int log2){ |
||
565 | int i; |
||
566 | int r= log2>=0 ? 1< |
||
567 | |||
568 | av_assert2(v>=0); |
||
569 | av_assert2(log2>=-4); |
||
570 | |||
571 | while(v >= r){ |
||
572 | put_rac(c, state+4+log2, 1); |
||
573 | v -= r; |
||
574 | log2++; |
||
575 | if(log2>0) r+=r; |
||
576 | } |
||
577 | put_rac(c, state+4+log2, 0); |
||
578 | |||
579 | for(i=log2-1; i>=0; i--){ |
||
580 | put_rac(c, state+31-i, (v>>i)&1); |
||
581 | } |
||
582 | } |
||
583 | |||
584 | static inline int get_symbol2(RangeCoder *c, uint8_t *state, int log2){ |
||
585 | int i; |
||
586 | int r= log2>=0 ? 1< |
||
587 | int v=0; |
||
588 | |||
589 | av_assert2(log2>=-4); |
||
590 | |||
591 | while(log2<28 && get_rac(c, state+4+log2)){ |
||
592 | v+= r; |
||
593 | log2++; |
||
594 | if(log2>0) r+=r; |
||
595 | } |
||
596 | |||
597 | for(i=log2-1; i>=0; i--){ |
||
598 | v+= get_rac(c, state+31-i)< |
||
599 | } |
||
600 | |||
601 | return v; |
||
602 | } |
||
603 | |||
604 | static inline void unpack_coeffs(SnowContext *s, SubBand *b, SubBand * parent, int orientation){ |
||
605 | const int w= b->width; |
||
606 | const int h= b->height; |
||
607 | int x,y; |
||
608 | |||
609 | int run, runs; |
||
610 | x_and_coeff *xc= b->x_coeff; |
||
611 | x_and_coeff *prev_xc= NULL; |
||
612 | x_and_coeff *prev2_xc= xc; |
||
613 | x_and_coeff *parent_xc= parent ? parent->x_coeff : NULL; |
||
614 | x_and_coeff *prev_parent_xc= parent_xc; |
||
615 | |||
616 | runs= get_symbol2(&s->c, b->state[30], 0); |
||
617 | if(runs-- > 0) run= get_symbol2(&s->c, b->state[1], 3); |
||
618 | else run= INT_MAX; |
||
619 | |||
620 | for(y=0; y |
||
621 | int v=0; |
||
622 | int lt=0, t=0, rt=0; |
||
623 | |||
624 | if(y && prev_xc->x == 0){ |
||
625 | rt= prev_xc->coeff; |
||
626 | } |
||
627 | for(x=0; x |
||
628 | int p=0; |
||
629 | const int l= v; |
||
630 | |||
631 | lt= t; t= rt; |
||
632 | |||
633 | if(y){ |
||
634 | if(prev_xc->x <= x) |
||
635 | prev_xc++; |
||
636 | if(prev_xc->x == x + 1) |
||
637 | rt= prev_xc->coeff; |
||
638 | else |
||
639 | rt=0; |
||
640 | } |
||
641 | if(parent_xc){ |
||
642 | if(x>>1 > parent_xc->x){ |
||
643 | parent_xc++; |
||
644 | } |
||
645 | if(x>>1 == parent_xc->x){ |
||
646 | p= parent_xc->coeff; |
||
647 | } |
||
648 | } |
||
649 | if(/*ll|*/l|lt|t|rt|p){ |
||
650 | int context= av_log2(/*FFABS(ll) + */3*(l>>1) + (lt>>1) + (t&~1) + (rt>>1) + (p>>1)); |
||
651 | |||
652 | v=get_rac(&s->c, &b->state[0][context]); |
||
653 | if(v){ |
||
654 | v= 2*(get_symbol2(&s->c, b->state[context + 2], context-4) + 1); |
||
655 | v+=get_rac(&s->c, &b->state[0][16 + 1 + 3 + ff_quant3bA[l&0xFF] + 3*ff_quant3bA[t&0xFF]]); |
||
656 | |||
657 | xc->x=x; |
||
658 | (xc++)->coeff= v; |
||
659 | } |
||
660 | }else{ |
||
661 | if(!run){ |
||
662 | if(runs-- > 0) run= get_symbol2(&s->c, b->state[1], 3); |
||
663 | else run= INT_MAX; |
||
664 | v= 2*(get_symbol2(&s->c, b->state[0 + 2], 0-4) + 1); |
||
665 | v+=get_rac(&s->c, &b->state[0][16 + 1 + 3]); |
||
666 | |||
667 | xc->x=x; |
||
668 | (xc++)->coeff= v; |
||
669 | }else{ |
||
670 | int max_run; |
||
671 | run--; |
||
672 | v=0; |
||
673 | av_assert2(run >= 0); |
||
674 | if(y) max_run= FFMIN(run, prev_xc->x - x - 2); |
||
675 | else max_run= FFMIN(run, w-x-1); |
||
676 | if(parent_xc) |
||
677 | max_run= FFMIN(max_run, 2*parent_xc->x - x - 1); |
||
678 | av_assert2(max_run >= 0 && max_run <= run); |
||
679 | |||
680 | x+= max_run; |
||
681 | run-= max_run; |
||
682 | } |
||
683 | } |
||
684 | } |
||
685 | (xc++)->x= w+1; //end marker |
||
686 | prev_xc= prev2_xc; |
||
687 | prev2_xc= xc; |
||
688 | |||
689 | if(parent_xc){ |
||
690 | if(y&1){ |
||
691 | while(parent_xc->x != parent->width+1) |
||
692 | parent_xc++; |
||
693 | parent_xc++; |
||
694 | prev_parent_xc= parent_xc; |
||
695 | }else{ |
||
696 | parent_xc= prev_parent_xc; |
||
697 | } |
||
698 | } |
||
699 | } |
||
700 | |||
701 | (xc++)->x= w+1; //end marker |
||
702 | } |
||
703 | |||
704 | #endif /* AVCODEC_SNOW_H */=>=> |