0,0 → 1,729 |
/* |
* 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; |
const 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; |
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; |
|
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; |
}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 */ |