| /* |
| * 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 "libavutil/motion_vector.h" |
| |
| #include "hpeldsp.h" |
| #include "me_cmp.h" |
| #include "qpeldsp.h" |
| #include "snow_dwt.h" |
| |
| #include "rangecoder.h" |
| #include "mathops.h" |
| |
| #define FF_MPV_OFFSET(x) (offsetof(MpegEncContext, x) + offsetof(SnowContext, m)) |
| #include "mpegvideo.h" |
| #include "h264qpel.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; |
| MECmpContext mecc; |
| HpelDSPContext hdsp; |
| QpelDSPContext qdsp; |
| VideoDSPContext vdsp; |
| H264QpelContext h264qpel; |
| MpegvideoEncDSPContext mpvencdsp; |
| SnowDWTContext dwt; |
| 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; |
| DWTELEM *temp_dwt_buffer; |
| IDWTELEM *spatial_idwt_buffer; |
| IDWTELEM *temp_idwt_buffer; |
| int *run_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; |
| int nb_planes; |
| 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; |
| int no_bitstream; |
| int intra_penalty; |
| int motion_est; |
| int iterative_dia_size; |
| int scenechange_threshold; |
| |
| 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; |
| uint8_t *emu_edge_buffer; |
| |
| AVMotionVector *avmv; |
| int avmv_index; |
| uint64_t encoding_error[AV_NUM_DATA_POINTERS]; |
| |
| int pred; |
| }SnowContext; |
| |
| /* Tables */ |
| extern const uint8_t * const ff_obmc_tab[4]; |
| extern uint8_t ff_qexp[QROOT]; |
| extern int ff_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, ptrdiff_t stride, |
| int sx, int sy, int b_w, int b_h, const BlockNode *block, |
| int plane_index, int w, int h); |
| int ff_snow_get_buffer(SnowContext *s, AVFrame *frame); |
| /* 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 = ff_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]; |
| // When src_stride is large enough, it is possible to interleave the blocks. |
| // Otherwise the blocks are written sequentially in the tmp buffer. |
| 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; |
| } |
| 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; |
| } |
| if(src_y + b_h> h){ |
| b_h = h - src_y; |
| } |
| |
| if(b_w<=0 || b_h<=0) return; |
| |
| 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>>s->chroma_h_shift : block_size; |
| int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size; |
| const uint8_t *obmc = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth]; |
| const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 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; |
| av_assert2(s->chroma_h_shift == s->chroma_v_shift); // obmc params assume squares |
| if(s->keyframe || (s->avctx->debug&512)){ |
| if(mb_y==mb_h) |
| return; |
| |
| if(add){ |
| for(y=block_h*mb_y; y<FFMIN(h,block_h*(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_h*mb_y; y<FFMIN(h,block_h*(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_h*mb_y - block_h/2, |
| block_w, block_h, |
| 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; |
| const int block_h= 1<<rem_depth; //FIXME "w!=h" |
| 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_h; 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){ |
| SnowContext *s = c->avctx->priv_data; |
| const int offset[3]= { |
| y*c-> stride + x, |
| ((y*c->uvstride + x)>>s->chroma_h_shift), |
| ((y*c->uvstride + x)>>s->chroma_h_shift), |
| }; |
| int i; |
| for(i=0; i<3; i++){ |
| c->src[0][i]= src [i]; |
| c->ref[0][i]= ref [i] + offset[i]; |
| } |
| av_assert2(!ref_index); |
| } |
| |
| |
| /* bitstream functions */ |
| |
| extern const int8_t ff_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++; |
| if (e > 31) |
| return AVERROR_INVALIDDATA; |
| } |
| |
| 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; |
| |
| av_assert2(v>=0); |
| av_assert2(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; |
| |
| av_assert2(log2>=-4); |
| |
| while(log2<28 && 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 + ff_quant3bA[l&0xFF] + 3*ff_quant3bA[t&0xFF]]); |
| if ((uint16_t)v != v) { |
| av_log(s->avctx, AV_LOG_ERROR, "Coefficient damaged\n"); |
| v = 1; |
| } |
| 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]); |
| if ((uint16_t)v != v) { |
| av_log(s->avctx, AV_LOG_ERROR, "Coefficient damaged\n"); |
| v = 1; |
| } |
| |
| xc->x=x; |
| (xc++)->coeff= v; |
| }else{ |
| int max_run; |
| run--; |
| v=0; |
| av_assert2(run >= 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); |
| av_assert2(max_run >= 0 && max_run <= run); |
| |
| 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 */ |
