/* * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at> * Copyright (C) 2006 Robert Edele <yartrebo@earthlink.net> * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef AVCODEC_SNOW_H #define AVCODEC_SNOW_H #include "dsputil.h" #include "dwt.h" #include "rangecoder.h" #include "mathops.h" #include "mpegvideo.h" #define MID_STATE 128 #define MAX_PLANES 4 #define QSHIFT 5 #define QROOT (1<<QSHIFT) #define LOSSLESS_QLOG -128 #define FRAC_BITS 4 #define MAX_REF_FRAMES 8 #define LOG2_OBMC_MAX 8 #define OBMC_MAX (1<<(LOG2_OBMC_MAX)) typedef struct BlockNode{ int16_t mx; int16_t my; uint8_t ref; uint8_t color[3]; uint8_t type; //#define TYPE_SPLIT 1 #define BLOCK_INTRA 1 #define BLOCK_OPT 2 //#define TYPE_NOCOLOR 4 uint8_t level; //FIXME merge into type? }BlockNode; static const BlockNode null_block= { //FIXME add border maybe .color= {128,128,128}, .mx= 0, .my= 0, .ref= 0, .type= 0, .level= 0, }; #define LOG2_MB_SIZE 4 #define MB_SIZE (1<<LOG2_MB_SIZE) #define ENCODER_EXTRA_BITS 4 #define HTAPS_MAX 8 typedef struct x_and_coeff{ int16_t x; uint16_t coeff; } x_and_coeff; typedef struct SubBand{ int level; int stride; int width; int height; int qlog; ///< log(qscale)/log[2^(1/6)] DWTELEM *buf; IDWTELEM *ibuf; int buf_x_offset; int buf_y_offset; int stride_line; ///< Stride measured in lines, not pixels. x_and_coeff * x_coeff; struct SubBand *parent; uint8_t state[/*7*2*/ 7 + 512][32]; }SubBand; typedef struct Plane{ int width; int height; SubBand band[MAX_DECOMPOSITIONS][4]; int htaps; int8_t hcoeff[HTAPS_MAX/2]; int diag_mc; int fast_mc; int last_htaps; int8_t last_hcoeff[HTAPS_MAX/2]; int last_diag_mc; }Plane; typedef struct SnowContext{ AVClass *class; AVCodecContext *avctx; RangeCoder c; DSPContext dsp; DWTContext dwt; AVFrame new_picture; AVFrame input_picture; ///< new_picture with the internal linesizes AVFrame current_picture; AVFrame last_picture[MAX_REF_FRAMES]; uint8_t *halfpel_plane[MAX_REF_FRAMES][4][4]; AVFrame mconly_picture; // uint8_t q_context[16]; uint8_t header_state[32]; uint8_t block_state[128 + 32*128]; int keyframe; int always_reset; int version; int spatial_decomposition_type; int last_spatial_decomposition_type; int temporal_decomposition_type; int spatial_decomposition_count; int last_spatial_decomposition_count; int temporal_decomposition_count; int max_ref_frames; int ref_frames; int16_t (*ref_mvs[MAX_REF_FRAMES])[2]; uint32_t *ref_scores[MAX_REF_FRAMES]; DWTELEM *spatial_dwt_buffer; IDWTELEM *spatial_idwt_buffer; int colorspace_type; int chroma_h_shift; int chroma_v_shift; int spatial_scalability; int qlog; int last_qlog; int lambda; int lambda2; int pass1_rc; int mv_scale; int last_mv_scale; int qbias; int last_qbias; #define QBIAS_SHIFT 3 int b_width; int b_height; int block_max_depth; int last_block_max_depth; Plane plane[MAX_PLANES]; BlockNode *block; #define ME_CACHE_SIZE 1024 unsigned me_cache[ME_CACHE_SIZE]; unsigned me_cache_generation; slice_buffer sb; int memc_only; 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) uint8_t *scratchbuf; }SnowContext; /* Tables */ extern const uint8_t * const obmc_tab[4]; #ifdef __sgi // Avoid a name clash on SGI IRIX #undef qexp #endif extern uint8_t qexp[QROOT]; extern int scale_mv_ref[MAX_REF_FRAMES][MAX_REF_FRAMES]; /* C bits used by mmx/sse2/altivec */ static av_always_inline void snow_interleave_line_header(int * i, int width, IDWTELEM * low, IDWTELEM * high){ (*i) = (width) - 2; if (width & 1){ low[(*i)+1] = low[((*i)+1)>>1]; (*i)--; } } static av_always_inline void snow_interleave_line_footer(int * i, IDWTELEM * low, IDWTELEM * high){ for (; (*i)>=0; (*i)-=2){ low[(*i)+1] = high[(*i)>>1]; low[*i] = low[(*i)>>1]; } } 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){ for(; i<w; i++){ dst[i] = src[i] - ((mul * (ref[i] + ref[i + 1]) + add) >> shift); } if((width^lift_high)&1){ dst[w] = src[w] - ((mul * 2 * ref[w] + add) >> shift); } } static av_always_inline void snow_horizontal_compose_liftS_lead_out(int i, IDWTELEM * dst, IDWTELEM * src, IDWTELEM * ref, int width, int w){ for(; i<w; i++){ dst[i] = src[i] + ((ref[i] + ref[(i+1)]+W_BO + 4 * src[i]) >> W_BS); } if(width&1){ dst[w] = src[w] + ((2 * ref[w] + W_BO + 4 * src[w]) >> W_BS); } } /* common code */ int ff_snow_common_init(AVCodecContext *avctx); int ff_snow_common_init_after_header(AVCodecContext *avctx); void ff_snow_common_end(SnowContext *s); void ff_snow_release_buffer(AVCodecContext *avctx); void ff_snow_reset_contexts(SnowContext *s); int ff_snow_alloc_blocks(SnowContext *s); int ff_snow_frame_start(SnowContext *s); void ff_snow_pred_block(SnowContext *s, uint8_t *dst, uint8_t *tmp, int stride, int sx, int sy, int b_w, int b_h, BlockNode *block, int plane_index, int w, int h); /* common inline functions */ //XXX doublecheck all of them should stay inlined 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){ const int w= s->b_width << s->block_max_depth; const int rem_depth= s->block_max_depth - level; const int index= (x + y*w) << rem_depth; const int block_w= 1<<rem_depth; BlockNode block; int i,j; block.color[0]= l; block.color[1]= cb; block.color[2]= cr; block.mx= mx; block.my= my; block.ref= ref; block.type= type; block.level= level; for(j=0; j<block_w; j++){ for(i=0; i<block_w; i++){ s->block[index + i + j*w]= block; } } } static inline void pred_mv(SnowContext *s, int *mx, int *my, int ref, const BlockNode *left, const BlockNode *top, const BlockNode *tr){ if(s->ref_frames == 1){ *mx = mid_pred(left->mx, top->mx, tr->mx); *my = mid_pred(left->my, top->my, tr->my); }else{ const int *scale = scale_mv_ref[ref]; *mx = mid_pred((left->mx * scale[left->ref] + 128) >>8, (top ->mx * scale[top ->ref] + 128) >>8, (tr ->mx * scale[tr ->ref] + 128) >>8); *my = mid_pred((left->my * scale[left->ref] + 128) >>8, (top ->my * scale[top ->ref] + 128) >>8, (tr ->my * scale[tr ->ref] + 128) >>8); } } static av_always_inline int same_block(BlockNode *a, BlockNode *b){ if((a->type&BLOCK_INTRA) && (b->type&BLOCK_INTRA)){ return !((a->color[0] - b->color[0]) | (a->color[1] - b->color[1]) | (a->color[2] - b->color[2])); }else{ return !((a->mx - b->mx) | (a->my - b->my) | (a->ref - b->ref) | ((a->type ^ b->type)&BLOCK_INTRA)); } } //FIXME name cleanup (b_w, block_w, b_width stuff) //XXX should we really inline it? 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){ const int b_width = s->b_width << s->block_max_depth; const int b_height= s->b_height << s->block_max_depth; const int b_stride= b_width; BlockNode *lt= &s->block[b_x + b_y*b_stride]; BlockNode *rt= lt+1; BlockNode *lb= lt+b_stride; BlockNode *rb= lb+1; uint8_t *block[4]; int tmp_step= src_stride >= 7*MB_SIZE ? MB_SIZE : MB_SIZE*src_stride; uint8_t *tmp = s->scratchbuf; uint8_t *ptmp; int x,y; if(b_x<0){ lt= rt; lb= rb; }else if(b_x + 1 >= b_width){ rt= lt; rb= lb; } if(b_y<0){ lt= lb; rt= rb; }else if(b_y + 1 >= b_height){ lb= lt; rb= rt; } if(src_x<0){ //FIXME merge with prev & always round internal width up to *16 obmc -= src_x; b_w += src_x; if(!sliced && !offset_dst) dst -= src_x; src_x=0; }else if(src_x + b_w > w){ b_w = w - src_x; } if(src_y<0){ obmc -= src_y*obmc_stride; b_h += src_y; if(!sliced && !offset_dst) dst -= src_y*dst_stride; src_y=0; }else if(src_y + b_h> h){ b_h = h - src_y; } if(b_w<=0 || b_h<=0) return; assert(src_stride > 2*MB_SIZE + 5); if(!sliced && offset_dst) dst += src_x + src_y*dst_stride; dst8+= src_x + src_y*src_stride; // src += src_x + src_y*src_stride; ptmp= tmp + 3*tmp_step; block[0]= ptmp; ptmp+=tmp_step; ff_snow_pred_block(s, block[0], tmp, src_stride, src_x, src_y, b_w, b_h, lt, plane_index, w, h); if(same_block(lt, rt)){ block[1]= block[0]; }else{ block[1]= ptmp; ptmp+=tmp_step; ff_snow_pred_block(s, block[1], tmp, src_stride, src_x, src_y, b_w, b_h, rt, plane_index, w, h); } if(same_block(lt, lb)){ block[2]= block[0]; }else if(same_block(rt, lb)){ block[2]= block[1]; }else{ block[2]= ptmp; ptmp+=tmp_step; ff_snow_pred_block(s, block[2], tmp, src_stride, src_x, src_y, b_w, b_h, lb, plane_index, w, h); } if(same_block(lt, rb) ){ block[3]= block[0]; }else if(same_block(rt, rb)){ block[3]= block[1]; }else if(same_block(lb, rb)){ block[3]= block[2]; }else{ block[3]= ptmp; ff_snow_pred_block(s, block[3], tmp, src_stride, src_x, src_y, b_w, b_h, rb, plane_index, w, h); } if(sliced){ s->dwt.inner_add_yblock(obmc, obmc_stride, block, b_w, b_h, src_x,src_y, src_stride, sb, add, dst8); }else{ for(y=0; y<b_h; y++){ //FIXME ugly misuse of obmc_stride const uint8_t *obmc1= obmc + y*obmc_stride; const uint8_t *obmc2= obmc1+ (obmc_stride>>1); const uint8_t *obmc3= obmc1+ obmc_stride*(obmc_stride>>1); const uint8_t *obmc4= obmc3+ (obmc_stride>>1); for(x=0; x<b_w; x++){ int v= obmc1[x] * block[3][x + y*src_stride] +obmc2[x] * block[2][x + y*src_stride] +obmc3[x] * block[1][x + y*src_stride] +obmc4[x] * block[0][x + y*src_stride]; v <<= 8 - LOG2_OBMC_MAX; if(FRAC_BITS != 8){ v >>= 8 - FRAC_BITS; } if(add){ v += dst[x + y*dst_stride]; v = (v + (1<<(FRAC_BITS-1))) >> FRAC_BITS; if(v&(~255)) v= ~(v>>31); dst8[x + y*src_stride] = v; }else{ dst[x + y*dst_stride] -= v; } } } } } static av_always_inline void predict_slice(SnowContext *s, IDWTELEM *buf, int plane_index, int add, int mb_y){ Plane *p= &s->plane[plane_index]; const int mb_w= s->b_width << s->block_max_depth; const int mb_h= s->b_height << s->block_max_depth; int x, y, mb_x; int block_size = MB_SIZE >> s->block_max_depth; int block_w = plane_index ? block_size/2 : block_size; const uint8_t *obmc = plane_index ? obmc_tab[s->block_max_depth+1] : obmc_tab[s->block_max_depth]; const int obmc_stride= plane_index ? block_size : 2*block_size; int ref_stride= s->current_picture.linesize[plane_index]; uint8_t *dst8= s->current_picture.data[plane_index]; int w= p->width; int h= p->height; if(s->keyframe || (s->avctx->debug&512)){ if(mb_y==mb_h) return; if(add){ for(y=block_w*mb_y; y<FFMIN(h,block_w*(mb_y+1)); y++){ for(x=0; x<w; x++){ int v= buf[x + y*w] + (128<<FRAC_BITS) + (1<<(FRAC_BITS-1)); v >>= FRAC_BITS; if(v&(~255)) v= ~(v>>31); dst8[x + y*ref_stride]= v; } } }else{ for(y=block_w*mb_y; y<FFMIN(h,block_w*(mb_y+1)); y++){ for(x=0; x<w; x++){ buf[x + y*w]-= 128<<FRAC_BITS; } } } return; } for(mb_x=0; mb_x<=mb_w; mb_x++){ add_yblock(s, 0, NULL, buf, dst8, obmc, block_w*mb_x - block_w/2, block_w*mb_y - block_w/2, block_w, block_w, w, h, w, ref_stride, obmc_stride, mb_x - 1, mb_y - 1, add, 1, plane_index); } } static av_always_inline void predict_plane(SnowContext *s, IDWTELEM *buf, int plane_index, int add){ const int mb_h= s->b_height << s->block_max_depth; int mb_y; for(mb_y=0; mb_y<=mb_h; mb_y++) predict_slice(s, buf, plane_index, add, mb_y); } 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){ const int w= s->b_width << s->block_max_depth; const int rem_depth= s->block_max_depth - level; const int index= (x + y*w) << rem_depth; const int block_w= 1<<rem_depth; BlockNode block; int i,j; block.color[0]= l; block.color[1]= cb; block.color[2]= cr; block.mx= mx; block.my= my; block.ref= ref; block.type= type; block.level= level; for(j=0; j<block_w; j++){ for(i=0; i<block_w; i++){ s->block[index + i + j*w]= block; } } } 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){ const int offset[3]= { y*c-> stride + x, ((y*c->uvstride + x)>>1), ((y*c->uvstride + x)>>1), }; int i; for(i=0; i<3; i++){ c->src[0][i]= src [i]; c->ref[0][i]= ref [i] + offset[i]; } assert(!ref_index); } /* bitstream functions */ extern const int8_t quant3bA[256]; #define QEXPSHIFT (7-FRAC_BITS+8) //FIXME try to change this to 0 static inline void put_symbol(RangeCoder *c, uint8_t *state, int v, int is_signed){ int i; if(v){ const int a= FFABS(v); const int e= av_log2(a); const int el= FFMIN(e, 10); put_rac(c, state+0, 0); for(i=0; i<el; i++){ put_rac(c, state+1+i, 1); //1..10 } for(; i<e; i++){ put_rac(c, state+1+9, 1); //1..10 } put_rac(c, state+1+FFMIN(i,9), 0); for(i=e-1; i>=el; i--){ put_rac(c, state+22+9, (a>>i)&1); //22..31 } for(; i>=0; i--){ put_rac(c, state+22+i, (a>>i)&1); //22..31 } if(is_signed) put_rac(c, state+11 + el, v < 0); //11..21 }else{ put_rac(c, state+0, 1); } } static inline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed){ if(get_rac(c, state+0)) return 0; else{ int i, e, a; e= 0; while(get_rac(c, state+1 + FFMIN(e,9))){ //1..10 e++; } a= 1; for(i=e-1; i>=0; i--){ a += a + get_rac(c, state+22 + FFMIN(i,9)); //22..31 } e= -(is_signed && get_rac(c, state+11 + FFMIN(e,10))); //11..21 return (a^e)-e; } } static inline void put_symbol2(RangeCoder *c, uint8_t *state, int v, int log2){ int i; int r= log2>=0 ? 1<<log2 : 1; assert(v>=0); assert(log2>=-4); while(v >= r){ put_rac(c, state+4+log2, 1); v -= r; log2++; if(log2>0) r+=r; } put_rac(c, state+4+log2, 0); for(i=log2-1; i>=0; i--){ put_rac(c, state+31-i, (v>>i)&1); } } static inline int get_symbol2(RangeCoder *c, uint8_t *state, int log2){ int i; int r= log2>=0 ? 1<<log2 : 1; int v=0; assert(log2>=-4); while(get_rac(c, state+4+log2)){ v+= r; log2++; if(log2>0) r+=r; } for(i=log2-1; i>=0; i--){ v+= get_rac(c, state+31-i)<<i; } return v; } static inline void unpack_coeffs(SnowContext *s, SubBand *b, SubBand * parent, int orientation){ const int w= b->width; const int h= b->height; int x,y; int run, runs; x_and_coeff *xc= b->x_coeff; x_and_coeff *prev_xc= NULL; x_and_coeff *prev2_xc= xc; x_and_coeff *parent_xc= parent ? parent->x_coeff : NULL; x_and_coeff *prev_parent_xc= parent_xc; runs= get_symbol2(&s->c, b->state[30], 0); if(runs-- > 0) run= get_symbol2(&s->c, b->state[1], 3); else run= INT_MAX; for(y=0; y<h; y++){ int v=0; int lt=0, t=0, rt=0; if(y && prev_xc->x == 0){ rt= prev_xc->coeff; } for(x=0; x<w; x++){ int p=0; const int l= v; lt= t; t= rt; if(y){ if(prev_xc->x <= x) prev_xc++; if(prev_xc->x == x + 1) rt= prev_xc->coeff; else rt=0; } if(parent_xc){ if(x>>1 > parent_xc->x){ parent_xc++; } if(x>>1 == parent_xc->x){ p= parent_xc->coeff; } } if(/*ll|*/l|lt|t|rt|p){ int context= av_log2(/*FFABS(ll) + */3*(l>>1) + (lt>>1) + (t&~1) + (rt>>1) + (p>>1)); v=get_rac(&s->c, &b->state[0][context]); if(v){ v= 2*(get_symbol2(&s->c, b->state[context + 2], context-4) + 1); v+=get_rac(&s->c, &b->state[0][16 + 1 + 3 + quant3bA[l&0xFF] + 3*quant3bA[t&0xFF]]); xc->x=x; (xc++)->coeff= v; } }else{ if(!run){ if(runs-- > 0) run= get_symbol2(&s->c, b->state[1], 3); else run= INT_MAX; v= 2*(get_symbol2(&s->c, b->state[0 + 2], 0-4) + 1); v+=get_rac(&s->c, &b->state[0][16 + 1 + 3]); xc->x=x; (xc++)->coeff= v; }else{ int max_run; run--; v=0; if(y) max_run= FFMIN(run, prev_xc->x - x - 2); else max_run= FFMIN(run, w-x-1); if(parent_xc) max_run= FFMIN(max_run, 2*parent_xc->x - x - 1); x+= max_run; run-= max_run; } } } (xc++)->x= w+1; //end marker prev_xc= prev2_xc; prev2_xc= xc; if(parent_xc){ if(y&1){ while(parent_xc->x != parent->width+1) parent_xc++; parent_xc++; prev_parent_xc= parent_xc; }else{ parent_xc= prev_parent_xc; } } } (xc++)->x= w+1; //end marker } #endif /* AVCODEC_SNOW_H */