diff options
author | povaddict <povaddict@users.sourceforge.net> | 2010-02-10 02:16:44 +0300 |
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committer | povaddict <povaddict@users.sourceforge.net> | 2010-02-10 02:16:44 +0300 |
commit | 726a91b12a7524e45e7a901c9e4883af5b1bffe6 (patch) | |
tree | f5d25e3b2e84c92f4901280c73d5d3d7e6c3cd19 /src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/intrax8.c | |
parent | 02183f6e47ad4ea1057de9950482f291f2ae4290 (diff) |
Rename several directories to use MixedCase instead of lowercase.
They now mostly match the case used in #includes,
and they're consistent with the names of the .h files they contain.
git-svn-id: https://mpc-hc.svn.sourceforge.net/svnroot/mpc-hc/trunk@1648 10f7b99b-c216-0410-bff0-8a66a9350fd8
Diffstat (limited to 'src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/intrax8.c')
-rw-r--r-- | src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/intrax8.c | 789 |
1 files changed, 789 insertions, 0 deletions
diff --git a/src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/intrax8.c b/src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/intrax8.c new file mode 100644 index 000000000..70e3bff75 --- /dev/null +++ b/src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/intrax8.c @@ -0,0 +1,789 @@ +/* + * 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 + */ + +/** + * @file libavcodec/intrax8.c + * @brief IntraX8 (J-Frame) subdecoder, used by WMV2 and VC-1 + */ + +#include "avcodec.h" +#include "get_bits.h" +#include "mpegvideo.h" +#include "msmpeg4data.h" +#include "intrax8huf.h" +#include "intrax8.h" + +#define MAX_TABLE_DEPTH(table_bits, max_bits) ((max_bits+table_bits-1)/table_bits) + +#define DC_VLC_BITS 9 +#define AC_VLC_BITS 9 +#define OR_VLC_BITS 7 + +#define DC_VLC_MTD MAX_TABLE_DEPTH(DC_VLC_BITS, MAX_DC_VLC_BITS) +#define AC_VLC_MTD MAX_TABLE_DEPTH(AC_VLC_BITS, MAX_AC_VLC_BITS) +#define OR_VLC_MTD MAX_TABLE_DEPTH(OR_VLC_BITS, MAX_OR_VLC_BITS) + +static VLC j_ac_vlc[2][2][8]; //[quant<13],[intra/inter],[select] +static VLC j_dc_vlc[2][8]; //[quant], [select] +static VLC j_orient_vlc[2][4]; //[quant], [select] + +static av_cold void x8_vlc_init(void){ + int i; + int offset = 0; + int sizeidx = 0; + static const uint16_t sizes[8*4 + 8*2 + 2 + 4] = { + 576, 548, 582, 618, 546, 616, 560, 642, + 584, 582, 704, 664, 512, 544, 656, 640, + 512, 648, 582, 566, 532, 614, 596, 648, + 586, 552, 584, 590, 544, 578, 584, 624, + + 528, 528, 526, 528, 536, 528, 526, 544, + 544, 512, 512, 528, 528, 544, 512, 544, + + 128, 128, 128, 128, 128, 128}; + + static VLC_TYPE table[28150][2]; + +#define init_ac_vlc(dst,src) \ + dst.table = &table[offset]; \ + dst.table_allocated = sizes[sizeidx]; \ + offset += sizes[sizeidx++]; \ + init_vlc(&dst, \ + AC_VLC_BITS,77, \ + &src[1],4,2, \ + &src[0],4,2, \ + INIT_VLC_USE_NEW_STATIC) +//set ac tables + for(i=0;i<8;i++){ + init_ac_vlc( j_ac_vlc[0][0][i], x8_ac0_highquant_table[i][0] ); + init_ac_vlc( j_ac_vlc[0][1][i], x8_ac1_highquant_table[i][0] ); + init_ac_vlc( j_ac_vlc[1][0][i], x8_ac0_lowquant_table [i][0] ); + init_ac_vlc( j_ac_vlc[1][1][i], x8_ac1_lowquant_table [i][0] ); + } +#undef init_ac_vlc + +//set dc tables +#define init_dc_vlc(dst,src) \ + dst.table = &table[offset]; \ + dst.table_allocated = sizes[sizeidx]; \ + offset += sizes[sizeidx++]; \ + init_vlc(&dst, \ + DC_VLC_BITS,34, \ + &src[1],4,2, \ + &src[0],4,2, \ + INIT_VLC_USE_NEW_STATIC); + for(i=0;i<8;i++){ + init_dc_vlc( j_dc_vlc[0][i], x8_dc_highquant_table[i][0]); + init_dc_vlc( j_dc_vlc[1][i], x8_dc_lowquant_table [i][0]); + } +#undef init_dc_vlc + +//set orient tables +#define init_or_vlc(dst,src) \ + dst.table = &table[offset]; \ + dst.table_allocated = sizes[sizeidx]; \ + offset += sizes[sizeidx++]; \ + init_vlc(&dst, \ + OR_VLC_BITS,12, \ + &src[1],4,2, \ + &src[0],4,2, \ + INIT_VLC_USE_NEW_STATIC); + for(i=0;i<2;i++){ + init_or_vlc( j_orient_vlc[0][i], x8_orient_highquant_table[i][0]); + } + for(i=0;i<4;i++){ + init_or_vlc( j_orient_vlc[1][i], x8_orient_lowquant_table [i][0]) + } + if (offset != sizeof(table)/sizeof(VLC_TYPE)/2) + av_log(NULL, AV_LOG_ERROR, "table size %i does not match needed %i\n", (int)(sizeof(table)/sizeof(VLC_TYPE)/2), offset); +} +#undef init_or_vlc + +static void x8_reset_vlc_tables(IntraX8Context * w){ + memset(w->j_dc_vlc,0,sizeof(w->j_dc_vlc)); + memset(w->j_ac_vlc,0,sizeof(w->j_ac_vlc)); + w->j_orient_vlc=NULL; +} + +static inline void x8_select_ac_table(IntraX8Context * const w , int mode){ + MpegEncContext * const s= w->s; + int table_index; + + assert(mode<4); + + if( w->j_ac_vlc[mode] ) return; + + table_index = get_bits(&s->gb, 3); + w->j_ac_vlc[mode] = &j_ac_vlc[w->quant<13][mode>>1][table_index];//2 modes use same tables + assert(w->j_ac_vlc[mode]); +} + +static inline int x8_get_orient_vlc(IntraX8Context * w){ + MpegEncContext * const s= w->s; + int table_index; + + if(!w->j_orient_vlc ){ + table_index = get_bits(&s->gb, 1+(w->quant<13) ); + w->j_orient_vlc = &j_orient_vlc[w->quant<13][table_index]; + } + assert(w->j_orient_vlc); + assert(w->j_orient_vlc->table); + + return get_vlc2(&s->gb, w->j_orient_vlc->table, OR_VLC_BITS, OR_VLC_MTD); +} + +#define extra_bits(eb) (eb) +#define extra_run (0xFF<<8) +#define extra_level (0x00<<8) +#define run_offset(r) ((r)<<16) +#define level_offset(l) ((l)<<24) +static const uint32_t ac_decode_table[]={ + /*46*/ extra_bits(3) | extra_run | run_offset(16) | level_offset( 0), + /*47*/ extra_bits(3) | extra_run | run_offset(24) | level_offset( 0), + /*48*/ extra_bits(2) | extra_run | run_offset( 4) | level_offset( 1), + /*49*/ extra_bits(3) | extra_run | run_offset( 8) | level_offset( 1), + + /*50*/ extra_bits(5) | extra_run | run_offset(32) | level_offset( 0), + /*51*/ extra_bits(4) | extra_run | run_offset(16) | level_offset( 1), + + /*52*/ extra_bits(2) | extra_level | run_offset( 0) | level_offset( 4), + /*53*/ extra_bits(2) | extra_level | run_offset( 0) | level_offset( 8), + /*54*/ extra_bits(2) | extra_level | run_offset( 0) | level_offset(12), + /*55*/ extra_bits(3) | extra_level | run_offset( 0) | level_offset(16), + /*56*/ extra_bits(3) | extra_level | run_offset( 0) | level_offset(24), + + /*57*/ extra_bits(2) | extra_level | run_offset( 1) | level_offset( 3), + /*58*/ extra_bits(3) | extra_level | run_offset( 1) | level_offset( 7), + + /*59*/ extra_bits(2) | extra_run | run_offset(16) | level_offset( 0), + /*60*/ extra_bits(2) | extra_run | run_offset(20) | level_offset( 0), + /*61*/ extra_bits(2) | extra_run | run_offset(24) | level_offset( 0), + /*62*/ extra_bits(2) | extra_run | run_offset(28) | level_offset( 0), + /*63*/ extra_bits(4) | extra_run | run_offset(32) | level_offset( 0), + /*64*/ extra_bits(4) | extra_run | run_offset(48) | level_offset( 0), + + /*65*/ extra_bits(2) | extra_run | run_offset( 4) | level_offset( 1), + /*66*/ extra_bits(3) | extra_run | run_offset( 8) | level_offset( 1), + /*67*/ extra_bits(4) | extra_run | run_offset(16) | level_offset( 1), + + /*68*/ extra_bits(2) | extra_level | run_offset( 0) | level_offset( 4), + /*69*/ extra_bits(3) | extra_level | run_offset( 0) | level_offset( 8), + /*70*/ extra_bits(4) | extra_level | run_offset( 0) | level_offset(16), + + /*71*/ extra_bits(2) | extra_level | run_offset( 1) | level_offset( 3), + /*72*/ extra_bits(3) | extra_level | run_offset( 1) | level_offset( 7), +}; +//extra_bits = 3bits; extra_run/level = 1 bit; run_offset = 6bits; level_offset = 5 bits; +#undef extra_bits +#undef extra_run +#undef extra_level +#undef run_offset +#undef level_offset + +static void x8_get_ac_rlf(IntraX8Context * const w, const int mode, + int * const run, int * const level, int * const final){ + MpegEncContext * const s= w->s; + int i,e; + +// x8_select_ac_table(w,mode); + i = get_vlc2(&s->gb, w->j_ac_vlc[mode]->table, AC_VLC_BITS, AC_VLC_MTD); + + if(i<46){ //[0-45] + int t,l; + if(i<0){ + (*level)=(*final)=//prevent 'may be used unilitialized' + (*run)=64;//this would cause error exit in the ac loop + return; + } + + (*final) = t = (i>22); + i-=23*t; +/* + i== 0-15 r=0-15 l=0 ;r=i& %01111 + i==16-19 r=0-3 l=1 ;r=i& %00011 + i==20-21 r=0-1 l=2 ;r=i& %00001 + i==22 r=0 l=3 ;r=i& %00000 +l=lut_l[i/2]={0,0,0,0,0,0,0,0,1,1,2,3}[i>>1];// 11 10'01 01'00 00'00 00'00 00'00 00 => 0xE50000 +t=lut_mask[l]={0x0f,0x03,0x01,0x00}[l]; as i<256 the higher bits do not matter */ + l=(0xE50000>>(i&(0x1E)))&3;/*0x1E or (~1) or ((i>>1)<<1)*/ + t=(0x01030F>>(l<<3)); + + (*run) = i&t; + (*level) = l; + }else if(i<73){//[46-72] + uint32_t sm; + uint32_t mask; + + i-=46; + sm=ac_decode_table[i]; + + e=get_bits(&s->gb,sm&0xF);sm>>=8;//3bits + mask=sm&0xff;sm>>=8; //1bit + + (*run) =(sm&0xff) + (e&( mask));//6bits + (*level)=(sm>>8) + (e&(~mask));//5bits + (*final)=i>(58-46); + }else if(i<75){//[73-74] + static const uint8_t crazy_mix_runlevel[32]={ + 0x22,0x32,0x33,0x53,0x23,0x42,0x43,0x63, + 0x24,0x52,0x34,0x73,0x25,0x62,0x44,0x83, + 0x26,0x72,0x35,0x54,0x27,0x82,0x45,0x64, + 0x28,0x92,0x36,0x74,0x29,0xa2,0x46,0x84}; + + (*final)=!(i&1); + e=get_bits(&s->gb,5);//get the extra bits + (*run) =crazy_mix_runlevel[e]>>4; + (*level)=crazy_mix_runlevel[e]&0x0F; + }else{ + (*level)=get_bits( &s->gb, 7-3*(i&1)); + (*run) =get_bits( &s->gb, 6); + (*final)=get_bits1(&s->gb); + } + return; +} + +//static const uint8_t dc_extra_sbits[] ={0, 1,1, 1,1, 2,2, 3,3, 4,4, 5,5, 6,6, 7,7 }; +static const uint8_t dc_index_offset[] ={ 0, 1,2, 3,4, 5,7, 9,13, 17,25, 33,49, 65,97, 129,193}; + +static int x8_get_dc_rlf(IntraX8Context * const w,int const mode, int * const level, int * const final){ + MpegEncContext * const s= w->s; + int i,e,c; + + assert(mode<3); + if( !w->j_dc_vlc[mode] ) { + int table_index; + table_index = get_bits(&s->gb, 3); + //4 modes, same table + w->j_dc_vlc[mode]= &j_dc_vlc[w->quant<13][table_index]; + } + assert(w->j_dc_vlc); + assert(w->j_dc_vlc[mode]->table); + + i=get_vlc2(&s->gb, w->j_dc_vlc[mode]->table, DC_VLC_BITS, DC_VLC_MTD); + + /*(i>=17) {i-=17;final=1;}*/ + c= i>16; + (*final)=c; + i-=17*c; + + if(i<=0){ + (*level)=0; + return -i; + } + c=(i+1)>>1;//hackish way to calculate dc_extra_sbits[] + c-=c>1; + + e=get_bits(&s->gb,c);//get the extra bits + i=dc_index_offset[i]+(e>>1); + + e= -(e & 1);//0,0xffffff + (*level)= (i ^ e) - e;// (i^0)-0 , (i^0xff)-(-1) + return 0; +} +//end of huffman + +static int x8_setup_spatial_predictor(IntraX8Context * const w, const int chroma){ + MpegEncContext * const s= w->s; + int range; + int sum; + int quant; + + s->dsp.x8_setup_spatial_compensation(s->dest[chroma], s->edge_emu_buffer, + s->current_picture.linesize[chroma>0], + &range, &sum, w->edges); + if(chroma){ + w->orient=w->chroma_orient; + quant=w->quant_dc_chroma; + }else{ + quant=w->quant; + } + + w->flat_dc=0; + if(range < quant || range < 3){ + w->orient=0; + if(range < 3){//yep you read right, a +-1 idct error may break decoding! + w->flat_dc=1; + sum+=9; + w->predicted_dc = (sum*6899)>>17;//((1<<17)+9)/(8+8+1+2)=6899 + } + } + if(chroma) + return 0; + + assert(w->orient < 3); + if(range < 2*w->quant){ + if( (w->edges&3) == 0){ + if(w->orient==1) w->orient=11; + if(w->orient==2) w->orient=10; + }else{ + w->orient=0; + } + w->raw_orient=0; + }else{ + static const uint8_t prediction_table[3][12]={ + {0,8,4, 10,11, 2,6,9,1,3,5,7}, + {4,0,8, 11,10, 3,5,2,6,9,1,7}, + {8,0,4, 10,11, 1,7,2,6,9,3,5} + }; + w->raw_orient=x8_get_orient_vlc(w); + if(w->raw_orient<0) return -1; + assert(w->raw_orient < 12 ); + assert(w->orient<3); + w->orient=prediction_table[w->orient][w->raw_orient]; + } + return 0; +} + +static void x8_update_predictions(IntraX8Context * const w, const int orient, const int est_run ){ + MpegEncContext * const s= w->s; + + w->prediction_table[s->mb_x*2+(s->mb_y&1)] = (est_run<<2) + 1*(orient==4) + 2*(orient==8); +/* + y=2n+0 ->//0 2 4 + y=2n+1 ->//1 3 5 +*/ +} +static void x8_get_prediction_chroma(IntraX8Context * const w){ + MpegEncContext * const s= w->s; + + w->edges = 1*( !(s->mb_x>>1) ); + w->edges|= 2*( !(s->mb_y>>1) ); + w->edges|= 4*( s->mb_x >= (2*s->mb_width-1) );//mb_x for chroma would always be odd + + w->raw_orient=0; + if(w->edges&3){//lut_co[8]={inv,4,8,8, inv,4,8,8}<- =>{1,1,0,0;1,1,0,0} => 0xCC + w->chroma_orient=4<<((0xCC>>w->edges)&1); + return; + } + w->chroma_orient = (w->prediction_table[2*s->mb_x-2] & 0x03)<<2;//block[x-1][y|1-1)] +} + +static void x8_get_prediction(IntraX8Context * const w){ + MpegEncContext * const s= w->s; + int a,b,c,i; + + w->edges = 1*( !s->mb_x ); + w->edges|= 2*( !s->mb_y ); + w->edges|= 4*( s->mb_x >= (2*s->mb_width-1) ); + + switch(w->edges&3){ + case 0: + break; + case 1: + //take the one from the above block[0][y-1] + w->est_run = w->prediction_table[!(s->mb_y&1)]>>2; + w->orient = 1; + return; + case 2: + //take the one from the previous block[x-1][0] + w->est_run = w->prediction_table[2*s->mb_x-2]>>2; + w->orient = 2; + return; + case 3: + w->est_run = 16; + w->orient = 0; + return; + } + //no edge cases + b= w->prediction_table[2*s->mb_x + !(s->mb_y&1) ];//block[x ][y-1] + a= w->prediction_table[2*s->mb_x-2 + (s->mb_y&1) ];//block[x-1][y ] + c= w->prediction_table[2*s->mb_x-2 + !(s->mb_y&1) ];//block[x-1][y-1] + + w->est_run = FFMIN(b,a); + /* This condition has nothing to do with w->edges, even if it looks + similar it would trigger if e.g. x=3;y=2; + I guess somebody wrote something wrong and it became standard. */ + if( (s->mb_x & s->mb_y) != 0 ) w->est_run=FFMIN(c,w->est_run); + w->est_run>>=2; + + a&=3; + b&=3; + c&=3; + + i=( 0xFFEAF4C4>>(2*b+8*a) )&3; + if(i!=3) w->orient=i; + else w->orient=( 0xFFEAD8>>(2*c+8*(w->quant>12)) )&3; +/* +lut1[b][a]={ +->{0, 1, 0, pad}, + {0, 1, X, pad}, + {2, 2, 2, pad}} + pad 2 2 2; pad X 1 0; pad 0 1 0 <- +-> 11 10 '10 10 '11 11'01 00 '11 00'01 00=>0xEAF4C4 + +lut2[q>12][c]={ + ->{0,2,1,pad}, + {2,2,2,pad}} + pad 2 2 2; pad 1 2 0 <- +-> 11 10'10 10 '11 01'10 00=>0xEAD8 +*/ +} + + +static void x8_ac_compensation(IntraX8Context * const w, int const direction, int const dc_level){ + MpegEncContext * const s= w->s; + int t; +#define B(x,y) s->block[0][s->dsp.idct_permutation[(x)+(y)*8]] +#define T(x) ((x) * dc_level + 0x8000) >> 16; + switch(direction){ + case 0: + t = T(3811);//h + B(1,0) -= t; + B(0,1) -= t; + + t = T(487);//e + B(2,0) -= t; + B(0,2) -= t; + + t = T(506);//f + B(3,0) -= t; + B(0,3) -= t; + + t = T(135);//c + B(4,0) -= t; + B(0,4) -= t; + B(2,1) += t; + B(1,2) += t; + B(3,1) += t; + B(1,3) += t; + + t = T(173);//d + B(5,0) -= t; + B(0,5) -= t; + + t = T(61);//b + B(6,0) -= t; + B(0,6) -= t; + B(5,1) += t; + B(1,5) += t; + + t = T(42); //a + B(7,0) -= t; + B(0,7) -= t; + B(4,1) += t; + B(1,4) += t; + B(4,4) += t; + + t = T(1084);//g + B(1,1) += t; + + s->block_last_index[0] = FFMAX(s->block_last_index[0], 7*8); + break; + case 1: + B(0,1) -= T(6269); + B(0,3) -= T( 708); + B(0,5) -= T( 172); + B(0,7) -= T( 73); + + s->block_last_index[0] = FFMAX(s->block_last_index[0], 7*8); + break; + case 2: + B(1,0) -= T(6269); + B(3,0) -= T( 708); + B(5,0) -= T( 172); + B(7,0) -= T( 73); + + s->block_last_index[0] = FFMAX(s->block_last_index[0], 7); + break; + } +#undef B +#undef T +} + +static void dsp_x8_put_solidcolor(uint8_t const pix, uint8_t * dst, int const linesize){ + int k; + for(k=0;k<8;k++){ + memset(dst,pix,8); + dst+=linesize; + } +} + +static const int16_t quant_table[64] = { + 256, 256, 256, 256, 256, 256, 259, 262, + 265, 269, 272, 275, 278, 282, 285, 288, + 292, 295, 299, 303, 306, 310, 314, 317, + 321, 325, 329, 333, 337, 341, 345, 349, + 353, 358, 362, 366, 371, 375, 379, 384, + 389, 393, 398, 403, 408, 413, 417, 422, + 428, 433, 438, 443, 448, 454, 459, 465, + 470, 476, 482, 488, 493, 499, 505, 511 +}; + +static int x8_decode_intra_mb(IntraX8Context* const w, const int chroma){ + MpegEncContext * const s= w->s; + + uint8_t * scantable; + int final,run,level; + int ac_mode,dc_mode,est_run,dc_level; + int pos,n; + int zeros_only; + int use_quant_matrix; + int sign; + + assert(w->orient<12); + s->dsp.clear_block(s->block[0]); + + if(chroma){ + dc_mode=2; + }else{ + dc_mode=!!w->est_run;//0,1 + } + + if(x8_get_dc_rlf(w, dc_mode, &dc_level, &final)) return -1; + n=0; + zeros_only=0; + if(!final){//decode ac + use_quant_matrix=w->use_quant_matrix; + if(chroma){ + ac_mode = 1; + est_run = 64;//not used + }else{ + if (w->raw_orient < 3){ + use_quant_matrix = 0; + } + if(w->raw_orient > 4){ + ac_mode = 0; + est_run = 64; + }else{ + if(w->est_run > 1){ + ac_mode = 2; + est_run=w->est_run; + }else{ + ac_mode = 3; + est_run = 64; + } + } + } + x8_select_ac_table(w,ac_mode); + /*scantable_selector[12]={0,2,0,1,1,1,0,2,2,0,1,2};<- + -> 10'01' 00'10' 10'00' 01'01' 01'00' 10'00 =>0x928548 */ + scantable = w->scantable[ (0x928548>>(2*w->orient))&3 ].permutated; + pos=0; + do { + n++; + if( n >= est_run ){ + ac_mode=3; + x8_select_ac_table(w,3); + } + + x8_get_ac_rlf(w,ac_mode,&run,&level,&final); + + pos+=run+1; + if(pos>63){ + //this also handles vlc error in x8_get_ac_rlf + return -1; + } + level= (level+1) * w->dquant; + level+= w->qsum; + + sign = - get_bits1(&s->gb); + level = (level ^ sign) - sign; + + if(use_quant_matrix){ + level = (level*quant_table[pos])>>8; + } + s->block[0][ scantable[pos] ]=level; + }while(!final); + + s->block_last_index[0]=pos; + }else{//DC only + s->block_last_index[0]=0; + if(w->flat_dc && ((unsigned)(dc_level+1)) < 3){//[-1;1] + int32_t divide_quant= !chroma ? w->divide_quant_dc_luma: + w->divide_quant_dc_chroma; + int32_t dc_quant = !chroma ? w->quant: + w->quant_dc_chroma; + + //original intent dc_level+=predicted_dc/quant; but it got lost somewhere in the rounding + dc_level+= (w->predicted_dc*divide_quant + (1<<12) )>>13; + + dsp_x8_put_solidcolor( av_clip_uint8((dc_level*dc_quant+4)>>3), + s->dest[chroma], s->current_picture.linesize[!!chroma]); + + goto block_placed; + } + zeros_only = (dc_level == 0); + } + if(!chroma){ + s->block[0][0] = dc_level*w->quant; + }else{ + s->block[0][0] = dc_level*w->quant_dc_chroma; + } + + //there is !zero_only check in the original, but dc_level check is enough + if( (unsigned int)(dc_level+1) >= 3 && (w->edges&3) != 3 ){ + int direction; + /*ac_comp_direction[orient] = { 0, 3, 3, 1, 1, 0, 0, 0, 2, 2, 2, 1 };<- + -> 01'10' 10'10' 00'00' 00'01' 01'11' 11'00 =>0x6A017C */ + direction= (0x6A017C>>(w->orient*2))&3; + if (direction != 3){ + x8_ac_compensation(w, direction, s->block[0][0]);//modify block_last[] + } + } + + if(w->flat_dc){ + dsp_x8_put_solidcolor(w->predicted_dc, s->dest[chroma], s->current_picture.linesize[!!chroma]); + }else{ + s->dsp.x8_spatial_compensation[w->orient]( s->edge_emu_buffer, + s->dest[chroma], + s->current_picture.linesize[!!chroma] ); + } + if(!zeros_only) + s->dsp.idct_add ( s->dest[chroma], + s->current_picture.linesize[!!chroma], + s->block[0] ); + +block_placed: + + if(!chroma){ + x8_update_predictions(w,w->orient,n); + } + + if(s->loop_filter){ + uint8_t* ptr = s->dest[chroma]; + int linesize = s->current_picture.linesize[!!chroma]; + + if(!( (w->edges&2) || ( zeros_only && (w->orient|4)==4 ) )){ + s->dsp.x8_h_loop_filter(ptr, linesize, w->quant); + } + if(!( (w->edges&1) || ( zeros_only && (w->orient|8)==8 ) )){ + s->dsp.x8_v_loop_filter(ptr, linesize, w->quant); + } + } + return 0; +} + +static void x8_init_block_index(MpegEncContext *s){ //FIXME maybe merge with ff_* +//not s->linesize as this would be wrong for field pics +//not that IntraX8 has interlacing support ;) + const int linesize = s->current_picture.linesize[0]; + const int uvlinesize= s->current_picture.linesize[1]; + + s->dest[0] = s->current_picture.data[0]; + s->dest[1] = s->current_picture.data[1]; + s->dest[2] = s->current_picture.data[2]; + + s->dest[0] += s->mb_y * linesize << 3; + s->dest[1] += ( s->mb_y&(~1) ) * uvlinesize << 2;//chroma blocks are on add rows + s->dest[2] += ( s->mb_y&(~1) ) * uvlinesize << 2; +} + +/** + * Initialize IntraX8 frame decoder. + * Requires valid MpegEncContext with valid s->mb_width before calling. + * @param w pointer to IntraX8Context + * @param s pointer to MpegEncContext of the parent codec + */ +av_cold void ff_intrax8_common_init(IntraX8Context * w, MpegEncContext * const s){ + + w->s=s; + x8_vlc_init(); + assert(s->mb_width>0); + w->prediction_table=av_mallocz(s->mb_width*2*2);//two rows, 2 blocks per cannon mb + + ff_init_scantable(s->dsp.idct_permutation, &w->scantable[0], wmv1_scantable[0]); + ff_init_scantable(s->dsp.idct_permutation, &w->scantable[1], wmv1_scantable[2]); + ff_init_scantable(s->dsp.idct_permutation, &w->scantable[2], wmv1_scantable[3]); +} + +/** + * Destroy IntraX8 frame structure. + * @param w pointer to IntraX8Context + */ +av_cold void ff_intrax8_common_end(IntraX8Context * w) +{ + av_freep(&w->prediction_table); +} + +/** + * Decode single IntraX8 frame. + * The parent codec must fill s->loopfilter and s->gb (bitstream). + * The parent codec must call MPV_frame_start(), ff_er_frame_start() before calling this function. + * The parent codec must call ff_er_frame_end(), MPV_frame_end() after calling this function. + * This function does not use MPV_decode_mb(). + * lowres decoding is theoretically impossible. + * @param w pointer to IntraX8Context + * @param dquant doubled quantizer, it would be odd in case of VC-1 halfpq==1. + * @param quant_offset offset away from zero + */ +//FIXME extern uint8_t wmv3_dc_scale_table[32]; +int ff_intrax8_decode_picture(IntraX8Context * const w, int dquant, int quant_offset){ + MpegEncContext * const s= w->s; + int mb_xy; + assert(s); + w->use_quant_matrix = get_bits1(&s->gb); + + w->dquant = dquant; + w->quant = dquant >> 1; + w->qsum = quant_offset; + + w->divide_quant_dc_luma = ((1<<16) + (w->quant>>1)) / w->quant; + if(w->quant < 5){ + w->quant_dc_chroma = w->quant; + w->divide_quant_dc_chroma = w->divide_quant_dc_luma; + }else{ + w->quant_dc_chroma = w->quant+((w->quant+3)>>3); + w->divide_quant_dc_chroma = ((1<<16) + (w->quant_dc_chroma>>1)) / w->quant_dc_chroma; + } + x8_reset_vlc_tables(w); + + s->resync_mb_x=0; + s->resync_mb_y=0; + + for(s->mb_y=0; s->mb_y < s->mb_height*2; s->mb_y++){ + x8_init_block_index(s); + mb_xy=(s->mb_y>>1)*s->mb_stride; + + for(s->mb_x=0; s->mb_x < s->mb_width*2; s->mb_x++){ + x8_get_prediction(w); + if(x8_setup_spatial_predictor(w,0)) goto error; + if(x8_decode_intra_mb(w,0)) goto error; + + if( s->mb_x & s->mb_y & 1 ){ + x8_get_prediction_chroma(w); + + /*when setting up chroma, no vlc is read, + so no error condition can be reached*/ + x8_setup_spatial_predictor(w,1); + if(x8_decode_intra_mb(w,1)) goto error; + + x8_setup_spatial_predictor(w,2); + if(x8_decode_intra_mb(w,2)) goto error; + + s->dest[1]+= 8; + s->dest[2]+= 8; + + /*emulate MB info in the relevant tables*/ + s->mbskip_table [mb_xy]=0; + s->mbintra_table[mb_xy]=1; + s->current_picture.qscale_table[mb_xy]=w->quant; + mb_xy++; + } + s->dest[0]+= 8; + } + if(s->mb_y&1){ + ff_draw_horiz_band(s, (s->mb_y-1)*8, 16); + } + } + +error: + ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, + (s->mb_x>>1)-1, (s->mb_y>>1)-1, + (AC_END|DC_END|MV_END) ); + return 0; +} |