| 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 */ |