diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/intrax8.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/intrax8.c | 764 |
1 files changed, 0 insertions, 764 deletions
diff --git a/contrib/ffmpeg/libavcodec/intrax8.c b/contrib/ffmpeg/libavcodec/intrax8.c deleted file mode 100644 index 0436deb4c..000000000 --- a/contrib/ffmpeg/libavcodec/intrax8.c +++ /dev/null @@ -1,764 +0,0 @@ -/* - * 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 intrax8.c - * @brief IntraX8 (J-Frame) subdecoder, used by WMV2 and VC-1 - */ - -#include "avcodec.h" -#include "bitstream.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 void x8_vlc_init(){ - int i; - -#define init_ac_vlc(dst,src) \ - init_vlc(&dst, \ - AC_VLC_BITS,77, \ - &src[1],4,2, \ - &src[0],4,2, \ - 1) -//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) \ - init_vlc(&dst, \ - DC_VLC_BITS,34, \ - &src[1],4,2, \ - &src[0],4,2, \ - 1); - 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) \ - init_vlc(&dst, \ - OR_VLC_BITS,12, \ - &src[1],4,2, \ - &src[0],4,2, \ - 1); - 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]) - } -} -#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); - memset(s->block[0],0x00,64*sizeof(DCTELEM)); - - 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 - */ -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 - */ -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; -} |