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serge |
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/* |
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leyer3.c: the layer 3 decoder |
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copyright 1995-2008 by the mpg123 project - free software under the terms of the LGPL 2.1 |
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see COPYING and AUTHORS files in distribution or http://mpg123.org |
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initially written by Michael Hipp |
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Dear visitor: |
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If you feel you don't understand fully the works of this file, your feeling might be correct. |
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Optimize-TODO: put short bands into the band-field without the stride of 3 reals |
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Length-optimze: unify long and short band code where it is possible |
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The int-vs-pointer situation has to be cleaned up. |
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*/ |
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#include "mpg123lib_intern.h" |
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#include "huffman.h" |
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#include "getbits.h" |
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#include "debug.h" |
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/* define CUT_SFB21 if you want to cut-off the frequency above 16kHz */ |
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#if 0 |
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#define CUT_SFB21 |
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#endif |
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#ifdef REAL_IS_FIXED |
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#define NEW_DCT9 |
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#include "l3_integer_tables.h" |
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#else |
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/* static one-time calculated tables... or so */ |
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static real ispow[8207]; |
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static real aa_ca[8],aa_cs[8]; |
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static real win[4][36]; |
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static real win1[4][36]; |
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real COS9[9]; /* dct36_3dnow wants to use that */ |
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static real COS6_1,COS6_2; |
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real tfcos36[9]; /* dct36_3dnow wants to use that */ |
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static real tfcos12[3]; |
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#define NEW_DCT9 |
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#ifdef NEW_DCT9 |
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static real cos9[3],cos18[3]; |
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static real tan1_1[16],tan2_1[16],tan1_2[16],tan2_2[16]; |
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static real pow1_1[2][16],pow2_1[2][16],pow1_2[2][16],pow2_2[2][16]; |
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#endif |
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#endif |
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/* Decoder state data, living on the stack of do_layer3. */ |
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struct gr_info_s |
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{ |
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int scfsi; |
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unsigned part2_3_length; |
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unsigned big_values; |
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unsigned scalefac_compress; |
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unsigned block_type; |
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unsigned mixed_block_flag; |
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unsigned table_select[3]; |
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unsigned subblock_gain[3]; |
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unsigned maxband[3]; |
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unsigned maxbandl; |
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unsigned maxb; |
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unsigned region1start; |
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unsigned region2start; |
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unsigned preflag; |
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unsigned scalefac_scale; |
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unsigned count1table_select; |
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real *full_gain[3]; |
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real *pow2gain; |
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}; |
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struct III_sideinfo |
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{ |
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unsigned main_data_begin; |
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unsigned private_bits; |
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/* Hm, funny... struct inside struct... */ |
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struct { struct gr_info_s gr[2]; } ch[2]; |
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}; |
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struct bandInfoStruct |
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{ |
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int longIdx[23]; |
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int longDiff[22]; |
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int shortIdx[14]; |
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int shortDiff[13]; |
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}; |
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/* Techy details about our friendly MPEG data. Fairly constant over the years;-) */ |
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const struct bandInfoStruct bandInfo[9] = |
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{ |
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{ /* MPEG 1.0 */ |
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{0,4,8,12,16,20,24,30,36,44,52,62,74, 90,110,134,162,196,238,288,342,418,576}, |
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{4,4,4,4,4,4,6,6,8, 8,10,12,16,20,24,28,34,42,50,54, 76,158}, |
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{0,4*3,8*3,12*3,16*3,22*3,30*3,40*3,52*3,66*3, 84*3,106*3,136*3,192*3}, |
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{4,4,4,4,6,8,10,12,14,18,22,30,56} |
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}, |
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{ |
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{0,4,8,12,16,20,24,30,36,42,50,60,72, 88,106,128,156,190,230,276,330,384,576}, |
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{4,4,4,4,4,4,6,6,6, 8,10,12,16,18,22,28,34,40,46,54, 54,192}, |
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{0,4*3,8*3,12*3,16*3,22*3,28*3,38*3,50*3,64*3, 80*3,100*3,126*3,192*3}, |
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{4,4,4,4,6,6,10,12,14,16,20,26,66} |
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}, |
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{ |
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{0,4,8,12,16,20,24,30,36,44,54,66,82,102,126,156,194,240,296,364,448,550,576}, |
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{4,4,4,4,4,4,6,6,8,10,12,16,20,24,30,38,46,56,68,84,102, 26}, |
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{0,4*3,8*3,12*3,16*3,22*3,30*3,42*3,58*3,78*3,104*3,138*3,180*3,192*3}, |
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{4,4,4,4,6,8,12,16,20,26,34,42,12} |
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}, |
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{ /* MPEG 2.0 */ |
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{0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576}, |
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{6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54 } , |
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{0,4*3,8*3,12*3,18*3,24*3,32*3,42*3,56*3,74*3,100*3,132*3,174*3,192*3} , |
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{4,4,4,6,6,8,10,14,18,26,32,42,18 } |
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}, |
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{ /* Twiddling 3 values here (not just 330->332!) fixed bug 1895025. */ |
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{0,6,12,18,24,30,36,44,54,66,80,96,114,136,162,194,232,278,332,394,464,540,576}, |
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{6,6,6,6,6,6,8,10,12,14,16,18,22,26,32,38,46,54,62,70,76,36 }, |
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{0,4*3,8*3,12*3,18*3,26*3,36*3,48*3,62*3,80*3,104*3,136*3,180*3,192*3}, |
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{4,4,4,6,8,10,12,14,18,24,32,44,12 } |
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}, |
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{ |
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{0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576}, |
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{6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54 }, |
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{0,4*3,8*3,12*3,18*3,26*3,36*3,48*3,62*3,80*3,104*3,134*3,174*3,192*3}, |
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{4,4,4,6,8,10,12,14,18,24,30,40,18 } |
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}, |
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{ /* MPEG 2.5 */ |
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{0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576}, |
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{6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54}, |
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{0,12,24,36,54,78,108,144,186,240,312,402,522,576}, |
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{4,4,4,6,8,10,12,14,18,24,30,40,18} |
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}, |
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{ |
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{0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576}, |
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{6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54}, |
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{0,12,24,36,54,78,108,144,186,240,312,402,522,576}, |
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{4,4,4,6,8,10,12,14,18,24,30,40,18} |
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}, |
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{ |
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{0,12,24,36,48,60,72,88,108,132,160,192,232,280,336,400,476,566,568,570,572,574,576}, |
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{12,12,12,12,12,12,16,20,24,28,32,40,48,56,64,76,90,2,2,2,2,2}, |
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{0, 24, 48, 72,108,156,216,288,372,480,486,492,498,576}, |
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{8,8,8,12,16,20,24,28,36,2,2,2,26} |
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} |
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}; |
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static int mapbuf0[9][152]; |
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static int mapbuf1[9][156]; |
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static int mapbuf2[9][44]; |
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static int *map[9][3]; |
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static int *mapend[9][3]; |
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152 |
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static unsigned int n_slen2[512]; /* MPEG 2.0 slen for 'normal' mode */ |
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static unsigned int i_slen2[256]; /* MPEG 2.0 slen for intensity stereo */ |
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/* Some helpers used in init_layer3 */ |
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#ifdef OPT_MMXORSSE |
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real init_layer3_gainpow2_mmx(mpg123_handle *fr, int i) |
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{ |
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if(!fr->p.down_sample) return DOUBLE_TO_REAL(16384.0 * pow((double)2.0,-0.25 * (double) (i+210) )); |
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else return DOUBLE_TO_REAL(pow((double)2.0,-0.25 * (double) (i+210))); |
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} |
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#endif |
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real init_layer3_gainpow2(mpg123_handle *fr, int i) |
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{ |
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#if defined(REAL_IS_FIXED) && defined(PRECALC_TABLES) |
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return gainpow2[i+256]; |
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#else |
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return DOUBLE_TO_REAL_SCALE_LAYER3(pow((double)2.0,-0.25 * (double) (i+210)),i+256); |
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#endif |
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} |
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174 |
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175 |
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/* init tables for layer-3 ... specific with the downsampling... */ |
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void init_layer3(void) |
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{ |
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int i,j,k,l; |
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180 |
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#if !defined(REAL_IS_FIXED) || !defined(PRECALC_TABLES) |
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for(i=0;i<8207;i++) |
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ispow[i] = DOUBLE_TO_REAL_POW43(pow((double)i,(double)4.0/3.0)); |
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184 |
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for(i=0;i<8;i++) |
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{ |
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const double Ci[8] = {-0.6,-0.535,-0.33,-0.185,-0.095,-0.041,-0.0142,-0.0037}; |
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double sq = sqrt(1.0+Ci[i]*Ci[i]); |
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aa_cs[i] = DOUBLE_TO_REAL(1.0/sq); |
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aa_ca[i] = DOUBLE_TO_REAL(Ci[i]/sq); |
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} |
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for(i=0;i<18;i++) |
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{ |
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win[0][i] = win[1][i] = |
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DOUBLE_TO_REAL( 0.5*sin(M_PI/72.0 * (double)(2*(i+0) +1)) / cos(M_PI * (double)(2*(i+0) +19) / 72.0) ); |
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win[0][i+18] = win[3][i+18] = |
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DOUBLE_TO_REAL( 0.5*sin(M_PI/72.0 * (double)(2*(i+18)+1)) / cos(M_PI * (double)(2*(i+18)+19) / 72.0) ); |
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} |
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for(i=0;i<6;i++) |
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{ |
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win[1][i+18] = DOUBLE_TO_REAL(0.5 / cos ( M_PI * (double) (2*(i+18)+19) / 72.0 )); |
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win[3][i+12] = DOUBLE_TO_REAL(0.5 / cos ( M_PI * (double) (2*(i+12)+19) / 72.0 )); |
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win[1][i+24] = DOUBLE_TO_REAL(0.5 * sin( M_PI / 24.0 * (double) (2*i+13) ) / cos ( M_PI * (double) (2*(i+24)+19) / 72.0 )); |
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win[1][i+30] = win[3][i] = DOUBLE_TO_REAL(0.0); |
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win[3][i+6 ] = DOUBLE_TO_REAL(0.5 * sin( M_PI / 24.0 * (double) (2*i+1 ) ) / cos ( M_PI * (double) (2*(i+6 )+19) / 72.0 )); |
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} |
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208 |
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for(i=0;i<9;i++) |
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COS9[i] = DOUBLE_TO_REAL(cos( M_PI / 18.0 * (double) i)); |
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211 |
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for(i=0;i<9;i++) |
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tfcos36[i] = DOUBLE_TO_REAL(0.5 / cos ( M_PI * (double) (i*2+1) / 36.0 )); |
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214 |
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for(i=0;i<3;i++) |
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tfcos12[i] = DOUBLE_TO_REAL(0.5 / cos ( M_PI * (double) (i*2+1) / 12.0 )); |
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217 |
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COS6_1 = DOUBLE_TO_REAL(cos( M_PI / 6.0 * (double) 1)); |
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COS6_2 = DOUBLE_TO_REAL(cos( M_PI / 6.0 * (double) 2)); |
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220 |
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#ifdef NEW_DCT9 |
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cos9[0] = DOUBLE_TO_REAL(cos(1.0*M_PI/9.0)); |
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cos9[1] = DOUBLE_TO_REAL(cos(5.0*M_PI/9.0)); |
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cos9[2] = DOUBLE_TO_REAL(cos(7.0*M_PI/9.0)); |
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cos18[0] = DOUBLE_TO_REAL(cos(1.0*M_PI/18.0)); |
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cos18[1] = DOUBLE_TO_REAL(cos(11.0*M_PI/18.0)); |
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cos18[2] = DOUBLE_TO_REAL(cos(13.0*M_PI/18.0)); |
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#endif |
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229 |
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for(i=0;i<12;i++) |
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{ |
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win[2][i] = DOUBLE_TO_REAL(0.5 * sin( M_PI / 24.0 * (double) (2*i+1) ) / cos ( M_PI * (double) (2*i+7) / 24.0 )); |
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} |
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234 |
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for(i=0;i<16;i++) |
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{ |
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double t = tan( (double) i * M_PI / 12.0 ); |
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tan1_1[i] = DOUBLE_TO_REAL_15(t / (1.0+t)); |
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tan2_1[i] = DOUBLE_TO_REAL_15(1.0 / (1.0 + t)); |
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tan1_2[i] = DOUBLE_TO_REAL_15(M_SQRT2 * t / (1.0+t)); |
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tan2_2[i] = DOUBLE_TO_REAL_15(M_SQRT2 / (1.0 + t)); |
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242 |
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for(j=0;j<2;j++) |
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{ |
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double base = pow(2.0,-0.25*(j+1.0)); |
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double p1=1.0,p2=1.0; |
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if(i > 0) |
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{ |
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if( i & 1 ) p1 = pow(base,(i+1.0)*0.5); |
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else p2 = pow(base,i*0.5); |
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} |
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pow1_1[j][i] = DOUBLE_TO_REAL_15(p1); |
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pow2_1[j][i] = DOUBLE_TO_REAL_15(p2); |
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pow1_2[j][i] = DOUBLE_TO_REAL_15(M_SQRT2 * p1); |
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pow2_2[j][i] = DOUBLE_TO_REAL_15(M_SQRT2 * p2); |
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} |
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} |
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#endif |
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259 |
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260 |
for(j=0;j<4;j++) |
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{ |
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const int len[4] = { 36,36,12,36 }; |
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for(i=0;i |
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264 |
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265 |
for(i=1;i |
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} |
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267 |
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for(j=0;j<9;j++) |
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{ |
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const struct bandInfoStruct *bi = &bandInfo[j]; |
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int *mp; |
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272 |
int cb,lwin; |
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const int *bdf; |
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274 |
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mp = map[j][0] = mapbuf0[j]; |
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bdf = bi->longDiff; |
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for(i=0,cb = 0; cb < 8 ; cb++,i+=*bdf++) |
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{ |
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*mp++ = (*bdf) >> 1; |
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*mp++ = i; |
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*mp++ = 3; |
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282 |
*mp++ = cb; |
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283 |
} |
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bdf = bi->shortDiff+3; |
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for(cb=3;cb<13;cb++) |
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{ |
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287 |
int l = (*bdf++) >> 1; |
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288 |
for(lwin=0;lwin<3;lwin++) |
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{ |
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*mp++ = l; |
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*mp++ = i + lwin; |
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*mp++ = lwin; |
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293 |
*mp++ = cb; |
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294 |
} |
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295 |
i += 6*l; |
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296 |
} |
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297 |
mapend[j][0] = mp; |
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298 |
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299 |
mp = map[j][1] = mapbuf1[j]; |
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|
300 |
bdf = bi->shortDiff+0; |
|
|
301 |
for(i=0,cb=0;cb<13;cb++) |
|
|
302 |
{ |
|
|
303 |
int l = (*bdf++) >> 1; |
|
|
304 |
for(lwin=0;lwin<3;lwin++) |
|
|
305 |
{ |
|
|
306 |
*mp++ = l; |
|
|
307 |
*mp++ = i + lwin; |
|
|
308 |
*mp++ = lwin; |
|
|
309 |
*mp++ = cb; |
|
|
310 |
} |
|
|
311 |
i += 6*l; |
|
|
312 |
} |
|
|
313 |
mapend[j][1] = mp; |
|
|
314 |
|
|
|
315 |
mp = map[j][2] = mapbuf2[j]; |
|
|
316 |
bdf = bi->longDiff; |
|
|
317 |
for(cb = 0; cb < 22 ; cb++) |
|
|
318 |
{ |
|
|
319 |
*mp++ = (*bdf++) >> 1; |
|
|
320 |
*mp++ = cb; |
|
|
321 |
} |
|
|
322 |
mapend[j][2] = mp; |
|
|
323 |
} |
|
|
324 |
|
|
|
325 |
/* Now for some serious loopings! */ |
|
|
326 |
for(i=0;i<5;i++) |
|
|
327 |
for(j=0;j<6;j++) |
|
|
328 |
for(k=0;k<6;k++) |
|
|
329 |
{ |
|
|
330 |
int n = k + j * 6 + i * 36; |
|
|
331 |
i_slen2[n] = i|(j<<3)|(k<<6)|(3<<12); |
|
|
332 |
} |
|
|
333 |
for(i=0;i<4;i++) |
|
|
334 |
for(j=0;j<4;j++) |
|
|
335 |
for(k=0;k<4;k++) |
|
|
336 |
{ |
|
|
337 |
int n = k + j * 4 + i * 16; |
|
|
338 |
i_slen2[n+180] = i|(j<<3)|(k<<6)|(4<<12); |
|
|
339 |
} |
|
|
340 |
for(i=0;i<4;i++) |
|
|
341 |
for(j=0;j<3;j++) |
|
|
342 |
{ |
|
|
343 |
int n = j + i * 3; |
|
|
344 |
i_slen2[n+244] = i|(j<<3) | (5<<12); |
|
|
345 |
n_slen2[n+500] = i|(j<<3) | (2<<12) | (1<<15); |
|
|
346 |
} |
|
|
347 |
for(i=0;i<5;i++) |
|
|
348 |
for(j=0;j<5;j++) |
|
|
349 |
for(k=0;k<4;k++) |
|
|
350 |
for(l=0;l<4;l++) |
|
|
351 |
{ |
|
|
352 |
int n = l + k * 4 + j * 16 + i * 80; |
|
|
353 |
n_slen2[n] = i|(j<<3)|(k<<6)|(l<<9)|(0<<12); |
|
|
354 |
} |
|
|
355 |
for(i=0;i<5;i++) |
|
|
356 |
for(j=0;j<5;j++) |
|
|
357 |
for(k=0;k<4;k++) |
|
|
358 |
{ |
|
|
359 |
int n = k + j * 4 + i * 20; |
|
|
360 |
n_slen2[n+400] = i|(j<<3)|(k<<6)|(1<<12); |
|
|
361 |
} |
|
|
362 |
} |
|
|
363 |
|
|
|
364 |
|
|
|
365 |
void init_layer3_stuff(mpg123_handle *fr, real (*gainpow2)(mpg123_handle *fr, int i)) |
|
|
366 |
{ |
|
|
367 |
int i,j; |
|
|
368 |
|
|
|
369 |
for(i=-256;i<118+4;i++) fr->gainpow2[i+256] = gainpow2(fr,i); |
|
|
370 |
|
|
|
371 |
for(j=0;j<9;j++) |
|
|
372 |
{ |
|
|
373 |
for(i=0;i<23;i++) |
|
|
374 |
{ |
|
|
375 |
fr->longLimit[j][i] = (bandInfo[j].longIdx[i] - 1 + 8) / 18 + 1; |
|
|
376 |
if(fr->longLimit[j][i] > (fr->down_sample_sblimit) ) |
|
|
377 |
fr->longLimit[j][i] = fr->down_sample_sblimit; |
|
|
378 |
} |
|
|
379 |
for(i=0;i<14;i++) |
|
|
380 |
{ |
|
|
381 |
fr->shortLimit[j][i] = (bandInfo[j].shortIdx[i] - 1) / 18 + 1; |
|
|
382 |
if(fr->shortLimit[j][i] > (fr->down_sample_sblimit) ) |
|
|
383 |
fr->shortLimit[j][i] = fr->down_sample_sblimit; |
|
|
384 |
} |
|
|
385 |
} |
|
|
386 |
} |
|
|
387 |
|
|
|
388 |
/* |
|
|
389 |
Observe! |
|
|
390 |
Now come the actualy decoding routines. |
|
|
391 |
*/ |
|
|
392 |
|
|
|
393 |
/* read additional side information (for MPEG 1 and MPEG 2) */ |
|
|
394 |
static int III_get_side_info(mpg123_handle *fr, struct III_sideinfo *si,int stereo, int ms_stereo,long sfreq,int single) |
|
|
395 |
{ |
|
|
396 |
int ch, gr; |
|
|
397 |
int powdiff = (single == SINGLE_MIX) ? 4 : 0; |
|
|
398 |
|
|
|
399 |
const int tabs[2][5] = { { 2,9,5,3,4 } , { 1,8,1,2,9 } }; |
|
|
400 |
const int *tab = tabs[fr->lsf]; |
|
|
401 |
|
|
|
402 |
si->main_data_begin = getbits(fr, tab[1]); |
|
|
403 |
|
|
|
404 |
if(si->main_data_begin > fr->bitreservoir) |
|
|
405 |
{ |
|
|
406 |
if(VERBOSE2) fprintf(stderr, "Note: missing %d bytes in bit reservoir for frame %li\n", (int)(si->main_data_begin - fr->bitreservoir), (long)fr->num); |
|
|
407 |
|
|
|
408 |
/* overwrite main_data_begin for the really available bit reservoir */ |
|
|
409 |
backbits(fr, tab[1]); |
|
|
410 |
if(fr->lsf == 0) |
|
|
411 |
{ |
|
|
412 |
fr->wordpointer[0] = (unsigned char) (fr->bitreservoir >> 1); |
|
|
413 |
fr->wordpointer[1] = (unsigned char) ((fr->bitreservoir & 1) << 7); |
|
|
414 |
} |
|
|
415 |
else fr->wordpointer[0] = (unsigned char) fr->bitreservoir; |
|
|
416 |
|
|
|
417 |
/* zero "side-info" data for a silence-frame |
|
|
418 |
without touching audio data used as bit reservoir for following frame */ |
|
|
419 |
memset(fr->wordpointer+2, 0, fr->ssize-2); |
|
|
420 |
|
|
|
421 |
/* reread the new bit reservoir offset */ |
|
|
422 |
si->main_data_begin = getbits(fr, tab[1]); |
|
|
423 |
} |
|
|
424 |
|
|
|
425 |
/* Keep track of the available data bytes for the bit reservoir. |
|
|
426 |
Think: Substract the 2 crc bytes in parser already? */ |
|
|
427 |
fr->bitreservoir = fr->bitreservoir + fr->framesize - fr->ssize - (fr->error_protection ? 2 : 0); |
|
|
428 |
/* Limit the reservoir to the max for MPEG 1.0 or 2.x . */ |
|
|
429 |
if(fr->bitreservoir > (unsigned int) (fr->lsf == 0 ? 511 : 255)) |
|
|
430 |
fr->bitreservoir = (fr->lsf == 0 ? 511 : 255); |
|
|
431 |
|
|
|
432 |
/* Now back into less commented territory. It's code. It works. */ |
|
|
433 |
|
|
|
434 |
if (stereo == 1) |
|
|
435 |
si->private_bits = getbits_fast(fr, tab[2]); |
|
|
436 |
else |
|
|
437 |
si->private_bits = getbits_fast(fr, tab[3]); |
|
|
438 |
|
|
|
439 |
if(!fr->lsf) for(ch=0; ch |
|
|
440 |
{ |
|
|
441 |
si->ch[ch].gr[0].scfsi = -1; |
|
|
442 |
si->ch[ch].gr[1].scfsi = getbits_fast(fr, 4); |
|
|
443 |
} |
|
|
444 |
|
|
|
445 |
for (gr=0; gr |
|
|
446 |
for (ch=0; ch |
|
|
447 |
{ |
|
|
448 |
register struct gr_info_s *gr_info = &(si->ch[ch].gr[gr]); |
|
|
449 |
|
|
|
450 |
gr_info->part2_3_length = getbits(fr, 12); |
|
|
451 |
gr_info->big_values = getbits(fr, 9); |
|
|
452 |
if(gr_info->big_values > 288) |
|
|
453 |
{ |
|
|
454 |
error("big_values too large!"); |
|
|
455 |
gr_info->big_values = 288; |
|
|
456 |
} |
|
|
457 |
gr_info->pow2gain = fr->gainpow2+256 - getbits_fast(fr, 8) + powdiff; |
|
|
458 |
if(ms_stereo) gr_info->pow2gain += 2; |
|
|
459 |
|
|
|
460 |
gr_info->scalefac_compress = getbits(fr, tab[4]); |
|
|
461 |
|
|
|
462 |
if(get1bit(fr)) |
|
|
463 |
{ /* window switch flag */ |
|
|
464 |
int i; |
|
|
465 |
gr_info->block_type = getbits_fast(fr, 2); |
|
|
466 |
gr_info->mixed_block_flag = get1bit(fr); |
|
|
467 |
gr_info->table_select[0] = getbits_fast(fr, 5); |
|
|
468 |
gr_info->table_select[1] = getbits_fast(fr, 5); |
|
|
469 |
/* |
|
|
470 |
table_select[2] not needed, because there is no region2, |
|
|
471 |
but to satisfy some verification tools we set it either. |
|
|
472 |
*/ |
|
|
473 |
gr_info->table_select[2] = 0; |
|
|
474 |
for(i=0;i<3;i++) |
|
|
475 |
gr_info->full_gain[i] = gr_info->pow2gain + (getbits_fast(fr, 3)<<3); |
|
|
476 |
|
|
|
477 |
if(gr_info->block_type == 0) |
|
|
478 |
{ |
|
|
479 |
error("Blocktype == 0 and window-switching == 1 not allowed."); |
|
|
480 |
return 1; |
|
|
481 |
} |
|
|
482 |
|
|
|
483 |
/* region_count/start parameters are implicit in this case. */ |
|
|
484 |
if( (!fr->lsf || (gr_info->block_type == 2)) && !fr->mpeg25) |
|
|
485 |
{ |
|
|
486 |
gr_info->region1start = 36>>1; |
|
|
487 |
gr_info->region2start = 576>>1; |
|
|
488 |
} |
|
|
489 |
else |
|
|
490 |
{ |
|
|
491 |
if(fr->mpeg25) |
|
|
492 |
{ |
|
|
493 |
int r0c,r1c; |
|
|
494 |
if((gr_info->block_type == 2) && (!gr_info->mixed_block_flag) ) r0c = 5; |
|
|
495 |
else r0c = 7; |
|
|
496 |
|
|
|
497 |
r1c = 20 - r0c; |
|
|
498 |
gr_info->region1start = bandInfo[sfreq].longIdx[r0c+1] >> 1 ; |
|
|
499 |
gr_info->region2start = bandInfo[sfreq].longIdx[r0c+1+r1c+1] >> 1; |
|
|
500 |
} |
|
|
501 |
else |
|
|
502 |
{ |
|
|
503 |
gr_info->region1start = 54>>1; |
|
|
504 |
gr_info->region2start = 576>>1; |
|
|
505 |
} |
|
|
506 |
} |
|
|
507 |
} |
|
|
508 |
else |
|
|
509 |
{ |
|
|
510 |
int i,r0c,r1c; |
|
|
511 |
for (i=0; i<3; i++) |
|
|
512 |
gr_info->table_select[i] = getbits_fast(fr, 5); |
|
|
513 |
|
|
|
514 |
r0c = getbits_fast(fr, 4); |
|
|
515 |
r1c = getbits_fast(fr, 3); |
|
|
516 |
gr_info->region1start = bandInfo[sfreq].longIdx[r0c+1] >> 1 ; |
|
|
517 |
gr_info->region2start = bandInfo[sfreq].longIdx[r0c+1+r1c+1] >> 1; |
|
|
518 |
|
|
|
519 |
if(r0c + r1c + 2 > 22) gr_info->region2start = 576>>1; |
|
|
520 |
else gr_info->region2start = bandInfo[sfreq].longIdx[r0c+1+r1c+1] >> 1; |
|
|
521 |
|
|
|
522 |
gr_info->block_type = 0; |
|
|
523 |
gr_info->mixed_block_flag = 0; |
|
|
524 |
} |
|
|
525 |
if(!fr->lsf) gr_info->preflag = get1bit(fr); |
|
|
526 |
|
|
|
527 |
gr_info->scalefac_scale = get1bit(fr); |
|
|
528 |
gr_info->count1table_select = get1bit(fr); |
|
|
529 |
} |
|
|
530 |
return 0; |
|
|
531 |
} |
|
|
532 |
|
|
|
533 |
|
|
|
534 |
/* read scalefactors */ |
|
|
535 |
static int III_get_scale_factors_1(mpg123_handle *fr, int *scf,struct gr_info_s *gr_info,int ch,int gr) |
|
|
536 |
{ |
|
|
537 |
const unsigned char slen[2][16] = |
|
|
538 |
{ |
|
|
539 |
{0, 0, 0, 0, 3, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4}, |
|
|
540 |
{0, 1, 2, 3, 0, 1, 2, 3, 1, 2, 3, 1, 2, 3, 2, 3} |
|
|
541 |
}; |
|
|
542 |
int numbits; |
|
|
543 |
int num0 = slen[0][gr_info->scalefac_compress]; |
|
|
544 |
int num1 = slen[1][gr_info->scalefac_compress]; |
|
|
545 |
|
|
|
546 |
if(gr_info->block_type == 2) |
|
|
547 |
{ |
|
|
548 |
int i=18; |
|
|
549 |
numbits = (num0 + num1) * 18; |
|
|
550 |
|
|
|
551 |
if(gr_info->mixed_block_flag) |
|
|
552 |
{ |
|
|
553 |
for (i=8;i;i--) |
|
|
554 |
*scf++ = getbits_fast(fr, num0); |
|
|
555 |
|
|
|
556 |
i = 9; |
|
|
557 |
numbits -= num0; /* num0 * 17 + num1 * 18 */ |
|
|
558 |
} |
|
|
559 |
|
|
|
560 |
for(;i;i--) *scf++ = getbits_fast(fr, num0); |
|
|
561 |
|
|
|
562 |
for(i = 18; i; i--) *scf++ = getbits_fast(fr, num1); |
|
|
563 |
|
|
|
564 |
*scf++ = 0; *scf++ = 0; *scf++ = 0; /* short[13][0..2] = 0 */ |
|
|
565 |
} |
|
|
566 |
else |
|
|
567 |
{ |
|
|
568 |
int i; |
|
|
569 |
int scfsi = gr_info->scfsi; |
|
|
570 |
|
|
|
571 |
if(scfsi < 0) |
|
|
572 |
{ /* scfsi < 0 => granule == 0 */ |
|
|
573 |
for(i=11;i;i--) *scf++ = getbits_fast(fr, num0); |
|
|
574 |
|
|
|
575 |
for(i=10;i;i--) *scf++ = getbits_fast(fr, num1); |
|
|
576 |
|
|
|
577 |
numbits = (num0 + num1) * 10 + num0; |
|
|
578 |
*scf++ = 0; |
|
|
579 |
} |
|
|
580 |
else |
|
|
581 |
{ |
|
|
582 |
numbits = 0; |
|
|
583 |
if(!(scfsi & 0x8)) |
|
|
584 |
{ |
|
|
585 |
for (i=0;i<6;i++) *scf++ = getbits_fast(fr, num0); |
|
|
586 |
|
|
|
587 |
numbits += num0 * 6; |
|
|
588 |
} |
|
|
589 |
else scf += 6; |
|
|
590 |
|
|
|
591 |
if(!(scfsi & 0x4)) |
|
|
592 |
{ |
|
|
593 |
for (i=0;i<5;i++) *scf++ = getbits_fast(fr, num0); |
|
|
594 |
|
|
|
595 |
numbits += num0 * 5; |
|
|
596 |
} |
|
|
597 |
else scf += 5; |
|
|
598 |
|
|
|
599 |
if(!(scfsi & 0x2)) |
|
|
600 |
{ |
|
|
601 |
for(i=0;i<5;i++) *scf++ = getbits_fast(fr, num1); |
|
|
602 |
|
|
|
603 |
numbits += num1 * 5; |
|
|
604 |
} |
|
|
605 |
else scf += 5; |
|
|
606 |
|
|
|
607 |
if(!(scfsi & 0x1)) |
|
|
608 |
{ |
|
|
609 |
for (i=0;i<5;i++) *scf++ = getbits_fast(fr, num1); |
|
|
610 |
|
|
|
611 |
numbits += num1 * 5; |
|
|
612 |
} |
|
|
613 |
else scf += 5; |
|
|
614 |
|
|
|
615 |
*scf++ = 0; /* no l[21] in original sources */ |
|
|
616 |
} |
|
|
617 |
} |
|
|
618 |
return numbits; |
|
|
619 |
} |
|
|
620 |
|
|
|
621 |
|
|
|
622 |
static int III_get_scale_factors_2(mpg123_handle *fr, int *scf,struct gr_info_s *gr_info,int i_stereo) |
|
|
623 |
{ |
|
|
624 |
const unsigned char *pnt; |
|
|
625 |
int i,j,n=0,numbits=0; |
|
|
626 |
unsigned int slen; |
|
|
627 |
|
|
|
628 |
const unsigned char stab[3][6][4] = |
|
|
629 |
{ |
|
|
630 |
{ |
|
|
631 |
{ 6, 5, 5,5 } , { 6, 5, 7,3 } , { 11,10,0,0}, |
|
|
632 |
{ 7, 7, 7,0 } , { 6, 6, 6,3 } , { 8, 8,5,0} |
|
|
633 |
}, |
|
|
634 |
{ |
|
|
635 |
{ 9, 9, 9,9 } , { 9, 9,12,6 } , { 18,18,0,0}, |
|
|
636 |
{12,12,12,0 } , {12, 9, 9,6 } , { 15,12,9,0} |
|
|
637 |
}, |
|
|
638 |
{ |
|
|
639 |
{ 6, 9, 9,9 } , { 6, 9,12,6 } , { 15,18,0,0}, |
|
|
640 |
{ 6,15,12,0 } , { 6,12, 9,6 } , { 6,18,9,0} |
|
|
641 |
} |
|
|
642 |
}; |
|
|
643 |
|
|
|
644 |
if(i_stereo) /* i_stereo AND second channel -> do_layer3() checks this */ |
|
|
645 |
slen = i_slen2[gr_info->scalefac_compress>>1]; |
|
|
646 |
else |
|
|
647 |
slen = n_slen2[gr_info->scalefac_compress]; |
|
|
648 |
|
|
|
649 |
gr_info->preflag = (slen>>15) & 0x1; |
|
|
650 |
|
|
|
651 |
n = 0; |
|
|
652 |
if( gr_info->block_type == 2 ) |
|
|
653 |
{ |
|
|
654 |
n++; |
|
|
655 |
if(gr_info->mixed_block_flag) n++; |
|
|
656 |
} |
|
|
657 |
|
|
|
658 |
pnt = stab[n][(slen>>12)&0x7]; |
|
|
659 |
|
|
|
660 |
for(i=0;i<4;i++) |
|
|
661 |
{ |
|
|
662 |
int num = slen & 0x7; |
|
|
663 |
slen >>= 3; |
|
|
664 |
if(num) |
|
|
665 |
{ |
|
|
666 |
for(j=0;j<(int)(pnt[i]);j++) *scf++ = getbits_fast(fr, num); |
|
|
667 |
|
|
|
668 |
numbits += pnt[i] * num; |
|
|
669 |
} |
|
|
670 |
else |
|
|
671 |
for(j=0;j<(int)(pnt[i]);j++) *scf++ = 0; |
|
|
672 |
} |
|
|
673 |
|
|
|
674 |
n = (n << 1) + 1; |
|
|
675 |
for(i=0;i |
|
|
676 |
|
|
|
677 |
return numbits; |
|
|
678 |
} |
|
|
679 |
|
|
|
680 |
static const int pretab1[22] = {0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,2,2,3,3,3,2,0}; |
|
|
681 |
static const int pretab2[22] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; |
|
|
682 |
|
|
|
683 |
/* |
|
|
684 |
Dequantize samples |
|
|
685 |
...includes Huffman decoding |
|
|
686 |
*/ |
|
|
687 |
|
|
|
688 |
/* 24 is enough because tab13 has max. a 19 bit huffvector */ |
|
|
689 |
#define BITSHIFT ((sizeof(long)-1)*8) |
|
|
690 |
#define REFRESH_MASK \ |
|
|
691 |
while(num < BITSHIFT) { \ |
|
|
692 |
mask |= ((unsigned long)getbyte(fr))<<(BITSHIFT-num); \ |
|
|
693 |
num += 8; \ |
|
|
694 |
part2remain -= 8; } |
|
|
695 |
|
|
|
696 |
static int III_dequantize_sample(mpg123_handle *fr, real xr[SBLIMIT][SSLIMIT],int *scf, struct gr_info_s *gr_info,int sfreq,int part2bits) |
|
|
697 |
{ |
|
|
698 |
int shift = 1 + gr_info->scalefac_scale; |
|
|
699 |
real *xrpnt = (real *) xr; |
|
|
700 |
int l[3],l3; |
|
|
701 |
int part2remain = gr_info->part2_3_length - part2bits; |
|
|
702 |
int *me; |
|
|
703 |
#ifdef REAL_IS_FIXED |
|
|
704 |
int gainpow2_scale_idx = 378; |
|
|
705 |
#endif |
|
|
706 |
|
|
|
707 |
/* mhipp tree has this split up a bit... */ |
|
|
708 |
int num=getbitoffset(fr); |
|
|
709 |
long mask; |
|
|
710 |
/* We must split this, because for num==0 the shift is undefined if you do it in one step. */ |
|
|
711 |
mask = ((unsigned long) getbits(fr, num))< |
|
|
712 |
mask <<= 8-num; |
|
|
713 |
part2remain -= num; |
|
|
714 |
|
|
|
715 |
{ |
|
|
716 |
int bv = gr_info->big_values; |
|
|
717 |
int region1 = gr_info->region1start; |
|
|
718 |
int region2 = gr_info->region2start; |
|
|
719 |
if(region1 > region2) |
|
|
720 |
{ |
|
|
721 |
/* |
|
|
722 |
That's not optimal: it fixes a segfault with fuzzed data, but also apparently triggers where it shouldn't, see bug 1641196. |
|
|
723 |
The benefit of not crashing / having this security risk is bigger than these few frames of a lame-3.70 file that aren't audible anyway. |
|
|
724 |
But still, I want to know if indeed this check or the old lame is at fault. |
|
|
725 |
*/ |
|
|
726 |
error("You got some really nasty file there... region1>region2!"); |
|
|
727 |
return 1; |
|
|
728 |
} |
|
|
729 |
l3 = ((576>>1)-bv)>>1; |
|
|
730 |
|
|
|
731 |
/* we may lose the 'odd' bit here !! check this later again */ |
|
|
732 |
if(bv <= region1) |
|
|
733 |
{ |
|
|
734 |
l[0] = bv; |
|
|
735 |
l[1] = 0; |
|
|
736 |
l[2] = 0; |
|
|
737 |
} |
|
|
738 |
else |
|
|
739 |
{ |
|
|
740 |
l[0] = region1; |
|
|
741 |
if(bv <= region2) |
|
|
742 |
{ |
|
|
743 |
l[1] = bv - l[0]; |
|
|
744 |
l[2] = 0; |
|
|
745 |
} |
|
|
746 |
else |
|
|
747 |
{ |
|
|
748 |
l[1] = region2 - l[0]; |
|
|
749 |
l[2] = bv - region2; |
|
|
750 |
} |
|
|
751 |
} |
|
|
752 |
} |
|
|
753 |
|
|
|
754 |
if(gr_info->block_type == 2) |
|
|
755 |
{ |
|
|
756 |
/* decoding with short or mixed mode BandIndex table */ |
|
|
757 |
int i,max[4]; |
|
|
758 |
int step=0,lwin=3,cb=0; |
|
|
759 |
register real v = 0.0; |
|
|
760 |
register int *m,mc; |
|
|
761 |
|
|
|
762 |
if(gr_info->mixed_block_flag) |
|
|
763 |
{ |
|
|
764 |
max[3] = -1; |
|
|
765 |
max[0] = max[1] = max[2] = 2; |
|
|
766 |
m = map[sfreq][0]; |
|
|
767 |
me = mapend[sfreq][0]; |
|
|
768 |
} |
|
|
769 |
else |
|
|
770 |
{ |
|
|
771 |
max[0] = max[1] = max[2] = max[3] = -1; |
|
|
772 |
/* max[3] not really needed in this case */ |
|
|
773 |
m = map[sfreq][1]; |
|
|
774 |
me = mapend[sfreq][1]; |
|
|
775 |
} |
|
|
776 |
|
|
|
777 |
mc = 0; |
|
|
778 |
for(i=0;i<2;i++) |
|
|
779 |
{ |
|
|
780 |
int lp = l[i]; |
|
|
781 |
struct newhuff *h = ht+gr_info->table_select[i]; |
|
|
782 |
for(;lp;lp--,mc--) |
|
|
783 |
{ |
|
|
784 |
register int x,y; |
|
|
785 |
if( (!mc) ) |
|
|
786 |
{ |
|
|
787 |
mc = *m++; |
|
|
788 |
xrpnt = ((real *) xr) + (*m++); |
|
|
789 |
lwin = *m++; |
|
|
790 |
cb = *m++; |
|
|
791 |
if(lwin == 3) |
|
|
792 |
{ |
|
|
793 |
#ifdef REAL_IS_FIXED |
|
|
794 |
gainpow2_scale_idx = (int)(gr_info->pow2gain + (*scf << shift) - fr->gainpow2); |
|
|
795 |
#endif |
|
|
796 |
v = gr_info->pow2gain[(*scf++) << shift]; |
|
|
797 |
step = 1; |
|
|
798 |
} |
|
|
799 |
else |
|
|
800 |
{ |
|
|
801 |
#ifdef REAL_IS_FIXED |
|
|
802 |
gainpow2_scale_idx = (int)(gr_info->full_gain[lwin] + (*scf << shift) - fr->gainpow2); |
|
|
803 |
#endif |
|
|
804 |
v = gr_info->full_gain[lwin][(*scf++) << shift]; |
|
|
805 |
step = 3; |
|
|
806 |
} |
|
|
807 |
} |
|
|
808 |
{ |
|
|
809 |
register short *val = h->table; |
|
|
810 |
REFRESH_MASK; |
|
|
811 |
while((y=*val++)<0) |
|
|
812 |
{ |
|
|
813 |
if (mask < 0) val -= y; |
|
|
814 |
|
|
|
815 |
num--; |
|
|
816 |
mask <<= 1; |
|
|
817 |
} |
|
|
818 |
x = y >> 4; |
|
|
819 |
y &= 0xf; |
|
|
820 |
} |
|
|
821 |
if(x == 15 && h->linbits) |
|
|
822 |
{ |
|
|
823 |
max[lwin] = cb; |
|
|
824 |
REFRESH_MASK; |
|
|
825 |
x += ((unsigned long) mask) >> (BITSHIFT+8-h->linbits); |
|
|
826 |
num -= h->linbits+1; |
|
|
827 |
mask <<= h->linbits; |
|
|
828 |
if(mask < 0) *xrpnt = REAL_MUL_SCALE_LAYER3(-ispow[x], v, gainpow2_scale_idx); |
|
|
829 |
else *xrpnt = REAL_MUL_SCALE_LAYER3( ispow[x], v, gainpow2_scale_idx); |
|
|
830 |
|
|
|
831 |
mask <<= 1; |
|
|
832 |
} |
|
|
833 |
else if(x) |
|
|
834 |
{ |
|
|
835 |
max[lwin] = cb; |
|
|
836 |
if(mask < 0) *xrpnt = REAL_MUL_SCALE_LAYER3(-ispow[x], v, gainpow2_scale_idx); |
|
|
837 |
else *xrpnt = REAL_MUL_SCALE_LAYER3( ispow[x], v, gainpow2_scale_idx); |
|
|
838 |
|
|
|
839 |
num--; |
|
|
840 |
mask <<= 1; |
|
|
841 |
} |
|
|
842 |
else *xrpnt = DOUBLE_TO_REAL(0.0); |
|
|
843 |
|
|
|
844 |
xrpnt += step; |
|
|
845 |
if(y == 15 && h->linbits) |
|
|
846 |
{ |
|
|
847 |
max[lwin] = cb; |
|
|
848 |
REFRESH_MASK; |
|
|
849 |
y += ((unsigned long) mask) >> (BITSHIFT+8-h->linbits); |
|
|
850 |
num -= h->linbits+1; |
|
|
851 |
mask <<= h->linbits; |
|
|
852 |
if(mask < 0) *xrpnt = REAL_MUL_SCALE_LAYER3(-ispow[y], v, gainpow2_scale_idx); |
|
|
853 |
else *xrpnt = REAL_MUL_SCALE_LAYER3( ispow[y], v, gainpow2_scale_idx); |
|
|
854 |
|
|
|
855 |
mask <<= 1; |
|
|
856 |
} |
|
|
857 |
else if(y) |
|
|
858 |
{ |
|
|
859 |
max[lwin] = cb; |
|
|
860 |
if(mask < 0) *xrpnt = REAL_MUL_SCALE_LAYER3(-ispow[y], v, gainpow2_scale_idx); |
|
|
861 |
else *xrpnt = REAL_MUL_SCALE_LAYER3( ispow[y], v, gainpow2_scale_idx); |
|
|
862 |
|
|
|
863 |
num--; |
|
|
864 |
mask <<= 1; |
|
|
865 |
} |
|
|
866 |
else *xrpnt = DOUBLE_TO_REAL(0.0); |
|
|
867 |
|
|
|
868 |
xrpnt += step; |
|
|
869 |
} |
|
|
870 |
} |
|
|
871 |
|
|
|
872 |
for(;l3 && (part2remain+num > 0);l3--) |
|
|
873 |
{ |
|
|
874 |
struct newhuff* h; |
|
|
875 |
register short* val; |
|
|
876 |
register short a; |
|
|
877 |
/* |
|
|
878 |
This is only a humble hack to prevent a special segfault. |
|
|
879 |
More insight into the real workings is still needed. |
|
|
880 |
Especially why there are (valid?) files that make xrpnt exceed the array with 4 bytes without segfaulting, more seems to be really bad, though. |
|
|
881 |
*/ |
|
|
882 |
#ifdef DEBUG |
|
|
883 |
if(!(xrpnt < &xr[SBLIMIT][0])) |
|
|
884 |
{ |
|
|
885 |
if(VERBOSE) debug2("attempted soft xrpnt overflow (%p !< %p) ?", (void*) xrpnt, (void*) &xr[SBLIMIT][0]); |
|
|
886 |
} |
|
|
887 |
#endif |
|
|
888 |
if(!(xrpnt < &xr[SBLIMIT][0]+5)) |
|
|
889 |
{ |
|
|
890 |
if(NOQUIET) error2("attempted xrpnt overflow (%p !< %p)", (void*) xrpnt, (void*) &xr[SBLIMIT][0]); |
|
|
891 |
return 2; |
|
|
892 |
} |
|
|
893 |
h = htc+gr_info->count1table_select; |
|
|
894 |
val = h->table; |
|
|
895 |
|
|
|
896 |
REFRESH_MASK; |
|
|
897 |
while((a=*val++)<0) |
|
|
898 |
{ |
|
|
899 |
if(mask < 0) val -= a; |
|
|
900 |
|
|
|
901 |
num--; |
|
|
902 |
mask <<= 1; |
|
|
903 |
} |
|
|
904 |
if(part2remain+num <= 0) |
|
|
905 |
{ |
|
|
906 |
num -= part2remain+num; |
|
|
907 |
break; |
|
|
908 |
} |
|
|
909 |
|
|
|
910 |
for(i=0;i<4;i++) |
|
|
911 |
{ |
|
|
912 |
if(!(i & 1)) |
|
|
913 |
{ |
|
|
914 |
if(!mc) |
|
|
915 |
{ |
|
|
916 |
mc = *m++; |
|
|
917 |
xrpnt = ((real *) xr) + (*m++); |
|
|
918 |
lwin = *m++; |
|
|
919 |
cb = *m++; |
|
|
920 |
if(lwin == 3) |
|
|
921 |
{ |
|
|
922 |
#ifdef REAL_IS_FIXED |
|
|
923 |
gainpow2_scale_idx = (int)(gr_info->pow2gain + (*scf << shift) - fr->gainpow2); |
|
|
924 |
#endif |
|
|
925 |
v = gr_info->pow2gain[(*scf++) << shift]; |
|
|
926 |
step = 1; |
|
|
927 |
} |
|
|
928 |
else |
|
|
929 |
{ |
|
|
930 |
#ifdef REAL_IS_FIXED |
|
|
931 |
gainpow2_scale_idx = (int)(gr_info->full_gain[lwin] + (*scf << shift) - fr->gainpow2); |
|
|
932 |
#endif |
|
|
933 |
v = gr_info->full_gain[lwin][(*scf++) << shift]; |
|
|
934 |
step = 3; |
|
|
935 |
} |
|
|
936 |
} |
|
|
937 |
mc--; |
|
|
938 |
} |
|
|
939 |
if( (a & (0x8>>i)) ) |
|
|
940 |
{ |
|
|
941 |
max[lwin] = cb; |
|
|
942 |
if(part2remain+num <= 0) |
|
|
943 |
break; |
|
|
944 |
|
|
|
945 |
if(mask < 0) *xrpnt = -REAL_SCALE_LAYER3(v, gainpow2_scale_idx); |
|
|
946 |
else *xrpnt = REAL_SCALE_LAYER3(v, gainpow2_scale_idx); |
|
|
947 |
|
|
|
948 |
num--; |
|
|
949 |
mask <<= 1; |
|
|
950 |
} |
|
|
951 |
else *xrpnt = DOUBLE_TO_REAL(0.0); |
|
|
952 |
|
|
|
953 |
xrpnt += step; |
|
|
954 |
} |
|
|
955 |
} |
|
|
956 |
|
|
|
957 |
if(lwin < 3) |
|
|
958 |
{ /* short band? */ |
|
|
959 |
while(1) |
|
|
960 |
{ |
|
|
961 |
for(;mc > 0;mc--) |
|
|
962 |
{ |
|
|
963 |
*xrpnt = DOUBLE_TO_REAL(0.0); xrpnt += 3; /* short band -> step=3 */ |
|
|
964 |
*xrpnt = DOUBLE_TO_REAL(0.0); xrpnt += 3; |
|
|
965 |
} |
|
|
966 |
if(m >= me) |
|
|
967 |
break; |
|
|
968 |
|
|
|
969 |
mc = *m++; |
|
|
970 |
xrpnt = ((real *) xr) + *m++; |
|
|
971 |
if(*m++ == 0) |
|
|
972 |
break; /* optimize: field will be set to zero at the end of the function */ |
|
|
973 |
|
|
|
974 |
m++; /* cb */ |
|
|
975 |
} |
|
|
976 |
} |
|
|
977 |
|
|
|
978 |
gr_info->maxband[0] = max[0]+1; |
|
|
979 |
gr_info->maxband[1] = max[1]+1; |
|
|
980 |
gr_info->maxband[2] = max[2]+1; |
|
|
981 |
gr_info->maxbandl = max[3]+1; |
|
|
982 |
|
|
|
983 |
{ |
|
|
984 |
int rmax = max[0] > max[1] ? max[0] : max[1]; |
|
|
985 |
rmax = (rmax > max[2] ? rmax : max[2]) + 1; |
|
|
986 |
gr_info->maxb = rmax ? fr->shortLimit[sfreq][rmax] : fr->longLimit[sfreq][max[3]+1]; |
|
|
987 |
} |
|
|
988 |
|
|
|
989 |
} |
|
|
990 |
else |
|
|
991 |
{ |
|
|
992 |
/* decoding with 'long' BandIndex table (block_type != 2) */ |
|
|
993 |
const int *pretab = gr_info->preflag ? pretab1 : pretab2; |
|
|
994 |
int i,max = -1; |
|
|
995 |
int cb = 0; |
|
|
996 |
int *m = map[sfreq][2]; |
|
|
997 |
register real v = 0.0; |
|
|
998 |
int mc = 0; |
|
|
999 |
|
|
|
1000 |
/* long hash table values */ |
|
|
1001 |
for(i=0;i<3;i++) |
|
|
1002 |
{ |
|
|
1003 |
int lp = l[i]; |
|
|
1004 |
struct newhuff *h = ht+gr_info->table_select[i]; |
|
|
1005 |
|
|
|
1006 |
for(;lp;lp--,mc--) |
|
|
1007 |
{ |
|
|
1008 |
int x,y; |
|
|
1009 |
if(!mc) |
|
|
1010 |
{ |
|
|
1011 |
mc = *m++; |
|
|
1012 |
cb = *m++; |
|
|
1013 |
#ifdef CUT_SFB21 |
|
|
1014 |
if(cb == 21) |
|
|
1015 |
v = 0.0; |
|
|
1016 |
else |
|
|
1017 |
#endif |
|
|
1018 |
{ |
|
|
1019 |
#ifdef REAL_IS_FIXED |
|
|
1020 |
gainpow2_scale_idx = (int)(gr_info->pow2gain + (*scf << shift) - fr->gainpow2); |
|
|
1021 |
#endif |
|
|
1022 |
v = gr_info->pow2gain[(*(scf++) + (*pretab++)) << shift]; |
|
|
1023 |
} |
|
|
1024 |
} |
|
|
1025 |
{ |
|
|
1026 |
register short *val = h->table; |
|
|
1027 |
REFRESH_MASK; |
|
|
1028 |
while((y=*val++)<0) |
|
|
1029 |
{ |
|
|
1030 |
if (mask < 0) val -= y; |
|
|
1031 |
|
|
|
1032 |
num--; |
|
|
1033 |
mask <<= 1; |
|
|
1034 |
} |
|
|
1035 |
x = y >> 4; |
|
|
1036 |
y &= 0xf; |
|
|
1037 |
} |
|
|
1038 |
|
|
|
1039 |
if(x == 15 && h->linbits) |
|
|
1040 |
{ |
|
|
1041 |
max = cb; |
|
|
1042 |
REFRESH_MASK; |
|
|
1043 |
x += ((unsigned long) mask) >> (BITSHIFT+8-h->linbits); |
|
|
1044 |
num -= h->linbits+1; |
|
|
1045 |
mask <<= h->linbits; |
|
|
1046 |
if(mask < 0) *xrpnt++ = REAL_MUL_SCALE_LAYER3(-ispow[x], v, gainpow2_scale_idx); |
|
|
1047 |
else *xrpnt++ = REAL_MUL_SCALE_LAYER3( ispow[x], v, gainpow2_scale_idx); |
|
|
1048 |
|
|
|
1049 |
mask <<= 1; |
|
|
1050 |
} |
|
|
1051 |
else if(x) |
|
|
1052 |
{ |
|
|
1053 |
max = cb; |
|
|
1054 |
if(mask < 0) *xrpnt++ = REAL_MUL_SCALE_LAYER3(-ispow[x], v, gainpow2_scale_idx); |
|
|
1055 |
else *xrpnt++ = REAL_MUL_SCALE_LAYER3( ispow[x], v, gainpow2_scale_idx); |
|
|
1056 |
num--; |
|
|
1057 |
|
|
|
1058 |
mask <<= 1; |
|
|
1059 |
} |
|
|
1060 |
else *xrpnt++ = DOUBLE_TO_REAL(0.0); |
|
|
1061 |
|
|
|
1062 |
if(y == 15 && h->linbits) |
|
|
1063 |
{ |
|
|
1064 |
max = cb; |
|
|
1065 |
REFRESH_MASK; |
|
|
1066 |
y += ((unsigned long) mask) >> (BITSHIFT+8-h->linbits); |
|
|
1067 |
num -= h->linbits+1; |
|
|
1068 |
mask <<= h->linbits; |
|
|
1069 |
if(mask < 0) *xrpnt++ = REAL_MUL_SCALE_LAYER3(-ispow[y], v, gainpow2_scale_idx); |
|
|
1070 |
else *xrpnt++ = REAL_MUL_SCALE_LAYER3( ispow[y], v, gainpow2_scale_idx); |
|
|
1071 |
|
|
|
1072 |
mask <<= 1; |
|
|
1073 |
} |
|
|
1074 |
else if(y) |
|
|
1075 |
{ |
|
|
1076 |
max = cb; |
|
|
1077 |
if(mask < 0) *xrpnt++ = REAL_MUL_SCALE_LAYER3(-ispow[y], v, gainpow2_scale_idx); |
|
|
1078 |
else *xrpnt++ = REAL_MUL_SCALE_LAYER3( ispow[y], v, gainpow2_scale_idx); |
|
|
1079 |
|
|
|
1080 |
num--; |
|
|
1081 |
mask <<= 1; |
|
|
1082 |
} |
|
|
1083 |
else *xrpnt++ = DOUBLE_TO_REAL(0.0); |
|
|
1084 |
} |
|
|
1085 |
} |
|
|
1086 |
|
|
|
1087 |
/* short (count1table) values */ |
|
|
1088 |
for(;l3 && (part2remain+num > 0);l3--) |
|
|
1089 |
{ |
|
|
1090 |
struct newhuff *h = htc+gr_info->count1table_select; |
|
|
1091 |
register short *val = h->table,a; |
|
|
1092 |
|
|
|
1093 |
REFRESH_MASK; |
|
|
1094 |
while((a=*val++)<0) |
|
|
1095 |
{ |
|
|
1096 |
if (mask < 0) val -= a; |
|
|
1097 |
|
|
|
1098 |
num--; |
|
|
1099 |
mask <<= 1; |
|
|
1100 |
} |
|
|
1101 |
if(part2remain+num <= 0) |
|
|
1102 |
{ |
|
|
1103 |
num -= part2remain+num; |
|
|
1104 |
break; |
|
|
1105 |
} |
|
|
1106 |
|
|
|
1107 |
for(i=0;i<4;i++) |
|
|
1108 |
{ |
|
|
1109 |
if(!(i & 1)) |
|
|
1110 |
{ |
|
|
1111 |
if(!mc) |
|
|
1112 |
{ |
|
|
1113 |
mc = *m++; |
|
|
1114 |
cb = *m++; |
|
|
1115 |
#ifdef CUT_SFB21 |
|
|
1116 |
if(cb == 21) |
|
|
1117 |
v = 0.0; |
|
|
1118 |
else |
|
|
1119 |
#endif |
|
|
1120 |
{ |
|
|
1121 |
#ifdef REAL_IS_FIXED |
|
|
1122 |
gainpow2_scale_idx = (int)(gr_info->pow2gain + (*scf << shift) - fr->gainpow2); |
|
|
1123 |
#endif |
|
|
1124 |
v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift]; |
|
|
1125 |
} |
|
|
1126 |
} |
|
|
1127 |
mc--; |
|
|
1128 |
} |
|
|
1129 |
if( (a & (0x8>>i)) ) |
|
|
1130 |
{ |
|
|
1131 |
max = cb; |
|
|
1132 |
if(part2remain+num <= 0) |
|
|
1133 |
break; |
|
|
1134 |
|
|
|
1135 |
if(mask < 0) *xrpnt++ = -REAL_SCALE_LAYER3(v, gainpow2_scale_idx); |
|
|
1136 |
else *xrpnt++ = REAL_SCALE_LAYER3(v, gainpow2_scale_idx); |
|
|
1137 |
|
|
|
1138 |
num--; |
|
|
1139 |
mask <<= 1; |
|
|
1140 |
} |
|
|
1141 |
else *xrpnt++ = DOUBLE_TO_REAL(0.0); |
|
|
1142 |
} |
|
|
1143 |
} |
|
|
1144 |
|
|
|
1145 |
gr_info->maxbandl = max+1; |
|
|
1146 |
gr_info->maxb = fr->longLimit[sfreq][gr_info->maxbandl]; |
|
|
1147 |
} |
|
|
1148 |
|
|
|
1149 |
part2remain += num; |
|
|
1150 |
backbits(fr, num); |
|
|
1151 |
num = 0; |
|
|
1152 |
|
|
|
1153 |
while(xrpnt < &xr[SBLIMIT][0]) |
|
|
1154 |
*xrpnt++ = DOUBLE_TO_REAL(0.0); |
|
|
1155 |
|
|
|
1156 |
while( part2remain > 16 ) |
|
|
1157 |
{ |
|
|
1158 |
skipbits(fr, 16); /* Dismiss stuffing Bits */ |
|
|
1159 |
part2remain -= 16; |
|
|
1160 |
} |
|
|
1161 |
if(part2remain > 0) skipbits(fr, part2remain); |
|
|
1162 |
else if(part2remain < 0) |
|
|
1163 |
{ |
|
|
1164 |
debug1("Can't rewind stream by %d bits!",-part2remain); |
|
|
1165 |
return 1; /* -> error */ |
|
|
1166 |
} |
|
|
1167 |
return 0; |
|
|
1168 |
} |
|
|
1169 |
|
|
|
1170 |
|
|
|
1171 |
/* calculate real channel values for Joint-I-Stereo-mode */ |
|
|
1172 |
static void III_i_stereo(real xr_buf[2][SBLIMIT][SSLIMIT],int *scalefac, struct gr_info_s *gr_info,int sfreq,int ms_stereo,int lsf) |
|
|
1173 |
{ |
|
|
1174 |
real (*xr)[SBLIMIT*SSLIMIT] = (real (*)[SBLIMIT*SSLIMIT] ) xr_buf; |
|
|
1175 |
const struct bandInfoStruct *bi = &bandInfo[sfreq]; |
|
|
1176 |
|
|
|
1177 |
const real *tab1,*tab2; |
|
|
1178 |
|
|
|
1179 |
#if 1 |
|
|
1180 |
int tab; |
|
|
1181 |
/* TODO: optimize as static */ |
|
|
1182 |
const real *tabs[3][2][2] = |
|
|
1183 |
{ |
|
|
1184 |
{ { tan1_1,tan2_1 } , { tan1_2,tan2_2 } }, |
|
|
1185 |
{ { pow1_1[0],pow2_1[0] } , { pow1_2[0],pow2_2[0] } }, |
|
|
1186 |
{ { pow1_1[1],pow2_1[1] } , { pow1_2[1],pow2_2[1] } } |
|
|
1187 |
}; |
|
|
1188 |
|
|
|
1189 |
tab = lsf + (gr_info->scalefac_compress & lsf); |
|
|
1190 |
tab1 = tabs[tab][ms_stereo][0]; |
|
|
1191 |
tab2 = tabs[tab][ms_stereo][1]; |
|
|
1192 |
#else |
|
|
1193 |
if(lsf) |
|
|
1194 |
{ |
|
|
1195 |
int p = gr_info->scalefac_compress & 0x1; |
|
|
1196 |
if(ms_stereo) |
|
|
1197 |
{ |
|
|
1198 |
tab1 = pow1_2[p]; |
|
|
1199 |
tab2 = pow2_2[p]; |
|
|
1200 |
} |
|
|
1201 |
else |
|
|
1202 |
{ |
|
|
1203 |
tab1 = pow1_1[p]; |
|
|
1204 |
tab2 = pow2_1[p]; |
|
|
1205 |
} |
|
|
1206 |
} |
|
|
1207 |
else |
|
|
1208 |
{ |
|
|
1209 |
if(ms_stereo) |
|
|
1210 |
{ |
|
|
1211 |
tab1 = tan1_2; |
|
|
1212 |
tab2 = tan2_2; |
|
|
1213 |
} |
|
|
1214 |
else |
|
|
1215 |
{ |
|
|
1216 |
tab1 = tan1_1; |
|
|
1217 |
tab2 = tan2_1; |
|
|
1218 |
} |
|
|
1219 |
} |
|
|
1220 |
#endif |
|
|
1221 |
|
|
|
1222 |
if(gr_info->block_type == 2) |
|
|
1223 |
{ |
|
|
1224 |
int lwin,do_l = 0; |
|
|
1225 |
if( gr_info->mixed_block_flag ) do_l = 1; |
|
|
1226 |
|
|
|
1227 |
for(lwin=0;lwin<3;lwin++) |
|
|
1228 |
{ /* process each window */ |
|
|
1229 |
/* get first band with zero values */ |
|
|
1230 |
int is_p,sb,idx,sfb = gr_info->maxband[lwin]; /* sfb is minimal 3 for mixed mode */ |
|
|
1231 |
if(sfb > 3) do_l = 0; |
|
|
1232 |
|
|
|
1233 |
for(;sfb<12;sfb++) |
|
|
1234 |
{ |
|
|
1235 |
is_p = scalefac[sfb*3+lwin-gr_info->mixed_block_flag]; /* scale: 0-15 */ |
|
|
1236 |
if(is_p != 7) |
|
|
1237 |
{ |
|
|
1238 |
real t1,t2; |
|
|
1239 |
sb = bi->shortDiff[sfb]; |
|
|
1240 |
idx = bi->shortIdx[sfb] + lwin; |
|
|
1241 |
t1 = tab1[is_p]; t2 = tab2[is_p]; |
|
|
1242 |
for (; sb > 0; sb--,idx+=3) |
|
|
1243 |
{ |
|
|
1244 |
real v = xr[0][idx]; |
|
|
1245 |
xr[0][idx] = REAL_MUL_15(v, t1); |
|
|
1246 |
xr[1][idx] = REAL_MUL_15(v, t2); |
|
|
1247 |
} |
|
|
1248 |
} |
|
|
1249 |
} |
|
|
1250 |
|
|
|
1251 |
#if 1 |
|
|
1252 |
/* in the original: copy 10 to 11 , here: copy 11 to 12 |
|
|
1253 |
maybe still wrong??? (copy 12 to 13?) */ |
|
|
1254 |
is_p = scalefac[11*3+lwin-gr_info->mixed_block_flag]; /* scale: 0-15 */ |
|
|
1255 |
sb = bi->shortDiff[12]; |
|
|
1256 |
idx = bi->shortIdx[12] + lwin; |
|
|
1257 |
#else |
|
|
1258 |
is_p = scalefac[10*3+lwin-gr_info->mixed_block_flag]; /* scale: 0-15 */ |
|
|
1259 |
sb = bi->shortDiff[11]; |
|
|
1260 |
idx = bi->shortIdx[11] + lwin; |
|
|
1261 |
#endif |
|
|
1262 |
if(is_p != 7) |
|
|
1263 |
{ |
|
|
1264 |
real t1,t2; |
|
|
1265 |
t1 = tab1[is_p]; t2 = tab2[is_p]; |
|
|
1266 |
for( ; sb > 0; sb--,idx+=3 ) |
|
|
1267 |
{ |
|
|
1268 |
real v = xr[0][idx]; |
|
|
1269 |
xr[0][idx] = REAL_MUL_15(v, t1); |
|
|
1270 |
xr[1][idx] = REAL_MUL_15(v, t2); |
|
|
1271 |
} |
|
|
1272 |
} |
|
|
1273 |
} /* end for(lwin; .. ; . ) */ |
|
|
1274 |
|
|
|
1275 |
/* also check l-part, if ALL bands in the three windows are 'empty' and mode = mixed_mode */ |
|
|
1276 |
if(do_l) |
|
|
1277 |
{ |
|
|
1278 |
int sfb = gr_info->maxbandl; |
|
|
1279 |
int idx; |
|
|
1280 |
if(sfb > 21) return; /* similarity fix related to CVE-2006-1655 */ |
|
|
1281 |
|
|
|
1282 |
idx = bi->longIdx[sfb]; |
|
|
1283 |
for( ; sfb<8; sfb++ ) |
|
|
1284 |
{ |
|
|
1285 |
int sb = bi->longDiff[sfb]; |
|
|
1286 |
int is_p = scalefac[sfb]; /* scale: 0-15 */ |
|
|
1287 |
if(is_p != 7) |
|
|
1288 |
{ |
|
|
1289 |
real t1,t2; |
|
|
1290 |
t1 = tab1[is_p]; t2 = tab2[is_p]; |
|
|
1291 |
for( ; sb > 0; sb--,idx++) |
|
|
1292 |
{ |
|
|
1293 |
real v = xr[0][idx]; |
|
|
1294 |
xr[0][idx] = REAL_MUL_15(v, t1); |
|
|
1295 |
xr[1][idx] = REAL_MUL_15(v, t2); |
|
|
1296 |
} |
|
|
1297 |
} |
|
|
1298 |
else idx += sb; |
|
|
1299 |
} |
|
|
1300 |
} |
|
|
1301 |
} |
|
|
1302 |
else |
|
|
1303 |
{ /* ((gr_info->block_type != 2)) */ |
|
|
1304 |
int sfb = gr_info->maxbandl; |
|
|
1305 |
int is_p,idx; |
|
|
1306 |
if(sfb > 21) return; /* tightened fix for CVE-2006-1655 */ |
|
|
1307 |
|
|
|
1308 |
idx = bi->longIdx[sfb]; |
|
|
1309 |
for ( ; sfb<21; sfb++) |
|
|
1310 |
{ |
|
|
1311 |
int sb = bi->longDiff[sfb]; |
|
|
1312 |
is_p = scalefac[sfb]; /* scale: 0-15 */ |
|
|
1313 |
if(is_p != 7) |
|
|
1314 |
{ |
|
|
1315 |
real t1,t2; |
|
|
1316 |
t1 = tab1[is_p]; t2 = tab2[is_p]; |
|
|
1317 |
for( ; sb > 0; sb--,idx++) |
|
|
1318 |
{ |
|
|
1319 |
real v = xr[0][idx]; |
|
|
1320 |
xr[0][idx] = REAL_MUL_15(v, t1); |
|
|
1321 |
xr[1][idx] = REAL_MUL_15(v, t2); |
|
|
1322 |
} |
|
|
1323 |
} |
|
|
1324 |
else idx += sb; |
|
|
1325 |
} |
|
|
1326 |
|
|
|
1327 |
is_p = scalefac[20]; |
|
|
1328 |
if(is_p != 7) |
|
|
1329 |
{ /* copy l-band 20 to l-band 21 */ |
|
|
1330 |
int sb; |
|
|
1331 |
real t1 = tab1[is_p],t2 = tab2[is_p]; |
|
|
1332 |
|
|
|
1333 |
for( sb = bi->longDiff[21]; sb > 0; sb--,idx++ ) |
|
|
1334 |
{ |
|
|
1335 |
real v = xr[0][idx]; |
|
|
1336 |
xr[0][idx] = REAL_MUL_15(v, t1); |
|
|
1337 |
xr[1][idx] = REAL_MUL_15(v, t2); |
|
|
1338 |
} |
|
|
1339 |
} |
|
|
1340 |
} |
|
|
1341 |
} |
|
|
1342 |
|
|
|
1343 |
|
|
|
1344 |
static void III_antialias(real xr[SBLIMIT][SSLIMIT],struct gr_info_s *gr_info) |
|
|
1345 |
{ |
|
|
1346 |
int sblim; |
|
|
1347 |
|
|
|
1348 |
if(gr_info->block_type == 2) |
|
|
1349 |
{ |
|
|
1350 |
if(!gr_info->mixed_block_flag) return; |
|
|
1351 |
|
|
|
1352 |
sblim = 1; |
|
|
1353 |
} |
|
|
1354 |
else sblim = gr_info->maxb-1; |
|
|
1355 |
|
|
|
1356 |
/* 31 alias-reduction operations between each pair of sub-bands */ |
|
|
1357 |
/* with 8 butterflies between each pair */ |
|
|
1358 |
|
|
|
1359 |
{ |
|
|
1360 |
int sb; |
|
|
1361 |
real *xr1=(real *) xr[1]; |
|
|
1362 |
|
|
|
1363 |
for(sb=sblim; sb; sb--,xr1+=10) |
|
|
1364 |
{ |
|
|
1365 |
int ss; |
|
|
1366 |
real *cs=aa_cs,*ca=aa_ca; |
|
|
1367 |
real *xr2 = xr1; |
|
|
1368 |
|
|
|
1369 |
for(ss=7;ss>=0;ss--) |
|
|
1370 |
{ /* upper and lower butterfly inputs */ |
|
|
1371 |
register real bu = *--xr2,bd = *xr1; |
|
|
1372 |
*xr2 = REAL_MUL(bu, *cs) - REAL_MUL(bd, *ca); |
|
|
1373 |
*xr1++ = REAL_MUL(bd, *cs++) + REAL_MUL(bu, *ca++); |
|
|
1374 |
} |
|
|
1375 |
} |
|
|
1376 |
} |
|
|
1377 |
} |
|
|
1378 |
|
|
|
1379 |
/* |
|
|
1380 |
This is an optimized DCT from Jeff Tsay's maplay 1.2+ package. |
|
|
1381 |
Saved one multiplication by doing the 'twiddle factor' stuff |
|
|
1382 |
together with the window mul. (MH) |
|
|
1383 |
|
|
|
1384 |
This uses Byeong Gi Lee's Fast Cosine Transform algorithm, but the |
|
|
1385 |
9 point IDCT needs to be reduced further. Unfortunately, I don't |
|
|
1386 |
know how to do that, because 9 is not an even number. - Jeff. |
|
|
1387 |
|
|
|
1388 |
Original Message: |
|
|
1389 |
|
|
|
1390 |
9 Point Inverse Discrete Cosine Transform |
|
|
1391 |
|
|
|
1392 |
This piece of code is Copyright 1997 Mikko Tommila and is freely usable |
|
|
1393 |
by anybody. The algorithm itself is of course in the public domain. |
|
|
1394 |
|
|
|
1395 |
Again derived heuristically from the 9-point WFTA. |
|
|
1396 |
|
|
|
1397 |
The algorithm is optimized (?) for speed, not for small rounding errors or |
|
|
1398 |
good readability. |
|
|
1399 |
|
|
|
1400 |
36 additions, 11 multiplications |
|
|
1401 |
|
|
|
1402 |
Again this is very likely sub-optimal. |
|
|
1403 |
|
|
|
1404 |
The code is optimized to use a minimum number of temporary variables, |
|
|
1405 |
so it should compile quite well even on 8-register Intel x86 processors. |
|
|
1406 |
This makes the code quite obfuscated and very difficult to understand. |
|
|
1407 |
|
|
|
1408 |
References: |
|
|
1409 |
[1] S. Winograd: "On Computing the Discrete Fourier Transform", |
|
|
1410 |
Mathematics of Computation, Volume 32, Number 141, January 1978, |
|
|
1411 |
Pages 175-199 |
|
|
1412 |
*/ |
|
|
1413 |
|
|
|
1414 |
/* Calculation of the inverse MDCT |
|
|
1415 |
used to be static without 3dnow - does that really matter? */ |
|
|
1416 |
void dct36(real *inbuf,real *o1,real *o2,real *wintab,real *tsbuf) |
|
|
1417 |
{ |
|
|
1418 |
#ifdef NEW_DCT9 |
|
|
1419 |
real tmp[18]; |
|
|
1420 |
#endif |
|
|
1421 |
|
|
|
1422 |
{ |
|
|
1423 |
register real *in = inbuf; |
|
|
1424 |
|
|
|
1425 |
in[17]+=in[16]; in[16]+=in[15]; in[15]+=in[14]; |
|
|
1426 |
in[14]+=in[13]; in[13]+=in[12]; in[12]+=in[11]; |
|
|
1427 |
in[11]+=in[10]; in[10]+=in[9]; in[9] +=in[8]; |
|
|
1428 |
in[8] +=in[7]; in[7] +=in[6]; in[6] +=in[5]; |
|
|
1429 |
in[5] +=in[4]; in[4] +=in[3]; in[3] +=in[2]; |
|
|
1430 |
in[2] +=in[1]; in[1] +=in[0]; |
|
|
1431 |
|
|
|
1432 |
in[17]+=in[15]; in[15]+=in[13]; in[13]+=in[11]; in[11]+=in[9]; |
|
|
1433 |
in[9] +=in[7]; in[7] +=in[5]; in[5] +=in[3]; in[3] +=in[1]; |
|
|
1434 |
|
|
|
1435 |
|
|
|
1436 |
#ifdef NEW_DCT9 |
|
|
1437 |
#if 1 |
|
|
1438 |
{ |
|
|
1439 |
real t3; |
|
|
1440 |
{ |
|
|
1441 |
real t0, t1, t2; |
|
|
1442 |
|
|
|
1443 |
t0 = REAL_MUL(COS6_2, (in[8] + in[16] - in[4])); |
|
|
1444 |
t1 = REAL_MUL(COS6_2, in[12]); |
|
|
1445 |
|
|
|
1446 |
t3 = in[0]; |
|
|
1447 |
t2 = t3 - t1 - t1; |
|
|
1448 |
tmp[1] = tmp[7] = t2 - t0; |
|
|
1449 |
tmp[4] = t2 + t0 + t0; |
|
|
1450 |
t3 += t1; |
|
|
1451 |
|
|
|
1452 |
t2 = REAL_MUL(COS6_1, (in[10] + in[14] - in[2])); |
|
|
1453 |
tmp[1] -= t2; |
|
|
1454 |
tmp[7] += t2; |
|
|
1455 |
} |
|
|
1456 |
{ |
|
|
1457 |
real t0, t1, t2; |
|
|
1458 |
|
|
|
1459 |
t0 = REAL_MUL(cos9[0], (in[4] + in[8] )); |
|
|
1460 |
t1 = REAL_MUL(cos9[1], (in[8] - in[16])); |
|
|
1461 |
t2 = REAL_MUL(cos9[2], (in[4] + in[16])); |
|
|
1462 |
|
|
|
1463 |
tmp[2] = tmp[6] = t3 - t0 - t2; |
|
|
1464 |
tmp[0] = tmp[8] = t3 + t0 + t1; |
|
|
1465 |
tmp[3] = tmp[5] = t3 - t1 + t2; |
|
|
1466 |
} |
|
|
1467 |
} |
|
|
1468 |
{ |
|
|
1469 |
real t1, t2, t3; |
|
|
1470 |
|
|
|
1471 |
t1 = REAL_MUL(cos18[0], (in[2] + in[10])); |
|
|
1472 |
t2 = REAL_MUL(cos18[1], (in[10] - in[14])); |
|
|
1473 |
t3 = REAL_MUL(COS6_1, in[6]); |
|
|
1474 |
|
|
|
1475 |
{ |
|
|
1476 |
real t0 = t1 + t2 + t3; |
|
|
1477 |
tmp[0] += t0; |
|
|
1478 |
tmp[8] -= t0; |
|
|
1479 |
} |
|
|
1480 |
|
|
|
1481 |
t2 -= t3; |
|
|
1482 |
t1 -= t3; |
|
|
1483 |
|
|
|
1484 |
t3 = REAL_MUL(cos18[2], (in[2] + in[14])); |
|
|
1485 |
|
|
|
1486 |
t1 += t3; |
|
|
1487 |
tmp[3] += t1; |
|
|
1488 |
tmp[5] -= t1; |
|
|
1489 |
|
|
|
1490 |
t2 -= t3; |
|
|
1491 |
tmp[2] += t2; |
|
|
1492 |
tmp[6] -= t2; |
|
|
1493 |
} |
|
|
1494 |
|
|
|
1495 |
#else |
|
|
1496 |
{ |
|
|
1497 |
real t0, t1, t2, t3, t4, t5, t6, t7; |
|
|
1498 |
|
|
|
1499 |
t1 = REAL_MUL(COS6_2, in[12]); |
|
|
1500 |
t2 = REAL_MUL(COS6_2, (in[8] + in[16] - in[4])); |
|
|
1501 |
|
|
|
1502 |
t3 = in[0] + t1; |
|
|
1503 |
t4 = in[0] - t1 - t1; |
|
|
1504 |
t5 = t4 - t2; |
|
|
1505 |
tmp[4] = t4 + t2 + t2; |
|
|
1506 |
|
|
|
1507 |
t0 = REAL_MUL(cos9[0], (in[4] + in[8])); |
|
|
1508 |
t1 = REAL_MUL(cos9[1], (in[8] - in[16])); |
|
|
1509 |
|
|
|
1510 |
t2 = REAL_MUL(cos9[2], (in[4] + in[16])); |
|
|
1511 |
|
|
|
1512 |
t6 = t3 - t0 - t2; |
|
|
1513 |
t0 += t3 + t1; |
|
|
1514 |
t3 += t2 - t1; |
|
|
1515 |
|
|
|
1516 |
t2 = REAL_MUL(cos18[0], (in[2] + in[10])); |
|
|
1517 |
t4 = REAL_MUL(cos18[1], (in[10] - in[14])); |
|
|
1518 |
t7 = REAL_MUL(COS6_1, in[6]); |
|
|
1519 |
|
|
|
1520 |
t1 = t2 + t4 + t7; |
|
|
1521 |
tmp[0] = t0 + t1; |
|
|
1522 |
tmp[8] = t0 - t1; |
|
|
1523 |
t1 = REAL_MUL(cos18[2], (in[2] + in[14])); |
|
|
1524 |
t2 += t1 - t7; |
|
|
1525 |
|
|
|
1526 |
tmp[3] = t3 + t2; |
|
|
1527 |
t0 = REAL_MUL(COS6_1, (in[10] + in[14] - in[2])); |
|
|
1528 |
tmp[5] = t3 - t2; |
|
|
1529 |
|
|
|
1530 |
t4 -= t1 + t7; |
|
|
1531 |
|
|
|
1532 |
tmp[1] = t5 - t0; |
|
|
1533 |
tmp[7] = t5 + t0; |
|
|
1534 |
tmp[2] = t6 + t4; |
|
|
1535 |
tmp[6] = t6 - t4; |
|
|
1536 |
} |
|
|
1537 |
#endif |
|
|
1538 |
|
|
|
1539 |
{ |
|
|
1540 |
real t0, t1, t2, t3, t4, t5, t6, t7; |
|
|
1541 |
|
|
|
1542 |
t1 = REAL_MUL(COS6_2, in[13]); |
|
|
1543 |
t2 = REAL_MUL(COS6_2, (in[9] + in[17] - in[5])); |
|
|
1544 |
|
|
|
1545 |
t3 = in[1] + t1; |
|
|
1546 |
t4 = in[1] - t1 - t1; |
|
|
1547 |
t5 = t4 - t2; |
|
|
1548 |
|
|
|
1549 |
t0 = REAL_MUL(cos9[0], (in[5] + in[9])); |
|
|
1550 |
t1 = REAL_MUL(cos9[1], (in[9] - in[17])); |
|
|
1551 |
|
|
|
1552 |
tmp[13] = REAL_MUL((t4 + t2 + t2), tfcos36[17-13]); |
|
|
1553 |
t2 = REAL_MUL(cos9[2], (in[5] + in[17])); |
|
|
1554 |
|
|
|
1555 |
t6 = t3 - t0 - t2; |
|
|
1556 |
t0 += t3 + t1; |
|
|
1557 |
t3 += t2 - t1; |
|
|
1558 |
|
|
|
1559 |
t2 = REAL_MUL(cos18[0], (in[3] + in[11])); |
|
|
1560 |
t4 = REAL_MUL(cos18[1], (in[11] - in[15])); |
|
|
1561 |
t7 = REAL_MUL(COS6_1, in[7]); |
|
|
1562 |
|
|
|
1563 |
t1 = t2 + t4 + t7; |
|
|
1564 |
tmp[17] = REAL_MUL((t0 + t1), tfcos36[17-17]); |
|
|
1565 |
tmp[9] = REAL_MUL((t0 - t1), tfcos36[17-9]); |
|
|
1566 |
t1 = REAL_MUL(cos18[2], (in[3] + in[15])); |
|
|
1567 |
t2 += t1 - t7; |
|
|
1568 |
|
|
|
1569 |
tmp[14] = REAL_MUL((t3 + t2), tfcos36[17-14]); |
|
|
1570 |
t0 = REAL_MUL(COS6_1, (in[11] + in[15] - in[3])); |
|
|
1571 |
tmp[12] = REAL_MUL((t3 - t2), tfcos36[17-12]); |
|
|
1572 |
|
|
|
1573 |
t4 -= t1 + t7; |
|
|
1574 |
|
|
|
1575 |
tmp[16] = REAL_MUL((t5 - t0), tfcos36[17-16]); |
|
|
1576 |
tmp[10] = REAL_MUL((t5 + t0), tfcos36[17-10]); |
|
|
1577 |
tmp[15] = REAL_MUL((t6 + t4), tfcos36[17-15]); |
|
|
1578 |
tmp[11] = REAL_MUL((t6 - t4), tfcos36[17-11]); |
|
|
1579 |
} |
|
|
1580 |
|
|
|
1581 |
#define MACRO(v) { \ |
|
|
1582 |
real tmpval; \ |
|
|
1583 |
tmpval = tmp[(v)] + tmp[17-(v)]; \ |
|
|
1584 |
out2[9+(v)] = REAL_MUL(tmpval, w[27+(v)]); \ |
|
|
1585 |
out2[8-(v)] = REAL_MUL(tmpval, w[26-(v)]); \ |
|
|
1586 |
tmpval = tmp[(v)] - tmp[17-(v)]; \ |
|
|
1587 |
ts[SBLIMIT*(8-(v))] = out1[8-(v)] + REAL_MUL(tmpval, w[8-(v)]); \ |
|
|
1588 |
ts[SBLIMIT*(9+(v))] = out1[9+(v)] + REAL_MUL(tmpval, w[9+(v)]); } |
|
|
1589 |
|
|
|
1590 |
{ |
|
|
1591 |
register real *out2 = o2; |
|
|
1592 |
register real *w = wintab; |
|
|
1593 |
register real *out1 = o1; |
|
|
1594 |
register real *ts = tsbuf; |
|
|
1595 |
|
|
|
1596 |
MACRO(0); |
|
|
1597 |
MACRO(1); |
|
|
1598 |
MACRO(2); |
|
|
1599 |
MACRO(3); |
|
|
1600 |
MACRO(4); |
|
|
1601 |
MACRO(5); |
|
|
1602 |
MACRO(6); |
|
|
1603 |
MACRO(7); |
|
|
1604 |
MACRO(8); |
|
|
1605 |
} |
|
|
1606 |
|
|
|
1607 |
#else |
|
|
1608 |
|
|
|
1609 |
{ |
|
|
1610 |
|
|
|
1611 |
#define MACRO0(v) { \ |
|
|
1612 |
real tmp; \ |
|
|
1613 |
out2[9+(v)] = REAL_MUL((tmp = sum0 + sum1), w[27+(v)]); \ |
|
|
1614 |
out2[8-(v)] = REAL_MUL(tmp, w[26-(v)]); } \ |
|
|
1615 |
sum0 -= sum1; \ |
|
|
1616 |
ts[SBLIMIT*(8-(v))] = out1[8-(v)] + REAL_MUL(sum0, w[8-(v)]); \ |
|
|
1617 |
ts[SBLIMIT*(9+(v))] = out1[9+(v)] + REAL_MUL(sum0, w[9+(v)]); |
|
|
1618 |
#define MACRO1(v) { \ |
|
|
1619 |
real sum0,sum1; \ |
|
|
1620 |
sum0 = tmp1a + tmp2a; \ |
|
|
1621 |
sum1 = REAL_MUL((tmp1b + tmp2b), tfcos36[(v)]); \ |
|
|
1622 |
MACRO0(v); } |
|
|
1623 |
#define MACRO2(v) { \ |
|
|
1624 |
real sum0,sum1; \ |
|
|
1625 |
sum0 = tmp2a - tmp1a; \ |
|
|
1626 |
sum1 = REAL_MUL((tmp2b - tmp1b), tfcos36[(v)]); \ |
|
|
1627 |
MACRO0(v); } |
|
|
1628 |
|
|
|
1629 |
register const real *c = COS9; |
|
|
1630 |
register real *out2 = o2; |
|
|
1631 |
register real *w = wintab; |
|
|
1632 |
register real *out1 = o1; |
|
|
1633 |
register real *ts = tsbuf; |
|
|
1634 |
|
|
|
1635 |
real ta33,ta66,tb33,tb66; |
|
|
1636 |
|
|
|
1637 |
ta33 = REAL_MUL(in[2*3+0], c[3]); |
|
|
1638 |
ta66 = REAL_MUL(in[2*6+0], c[6]); |
|
|
1639 |
tb33 = REAL_MUL(in[2*3+1], c[3]); |
|
|
1640 |
tb66 = REAL_MUL(in[2*6+1], c[6]); |
|
|
1641 |
|
|
|
1642 |
{ |
|
|
1643 |
real tmp1a,tmp2a,tmp1b,tmp2b; |
|
|
1644 |
tmp1a = REAL_MUL(in[2*1+0], c[1]) + ta33 + REAL_MUL(in[2*5+0], c[5]) + REAL_MUL(in[2*7+0], c[7]); |
|
|
1645 |
tmp1b = REAL_MUL(in[2*1+1], c[1]) + tb33 + REAL_MUL(in[2*5+1], c[5]) + REAL_MUL(in[2*7+1], c[7]); |
|
|
1646 |
tmp2a = REAL_MUL(in[2*2+0], c[2]) + REAL_MUL(in[2*4+0], c[4]) + ta66 + REAL_MUL(in[2*8+0], c[8]); |
|
|
1647 |
tmp2b = REAL_MUL(in[2*2+1], c[2]) + REAL_MUL(in[2*4+1], c[4]) + tb66 + REAL_MUL(in[2*8+1], c[8]); |
|
|
1648 |
|
|
|
1649 |
MACRO1(0); |
|
|
1650 |
MACRO2(8); |
|
|
1651 |
} |
|
|
1652 |
|
|
|
1653 |
{ |
|
|
1654 |
real tmp1a,tmp2a,tmp1b,tmp2b; |
|
|
1655 |
tmp1a = REAL_MUL(( in[2*1+0] - in[2*5+0] - in[2*7+0] ), c[3]); |
|
|
1656 |
tmp1b = REAL_MUL(( in[2*1+1] - in[2*5+1] - in[2*7+1] ), c[3]); |
|
|
1657 |
tmp2a = REAL_MUL(( in[2*2+0] - in[2*4+0] - in[2*8+0] ), c[6]) - in[2*6+0] + in[2*0+0]; |
|
|
1658 |
tmp2b = REAL_MUL(( in[2*2+1] - in[2*4+1] - in[2*8+1] ), c[6]) - in[2*6+1] + in[2*0+1]; |
|
|
1659 |
|
|
|
1660 |
MACRO1(1); |
|
|
1661 |
MACRO2(7); |
|
|
1662 |
} |
|
|
1663 |
|
|
|
1664 |
{ |
|
|
1665 |
real tmp1a,tmp2a,tmp1b,tmp2b; |
|
|
1666 |
tmp1a = REAL_MUL(in[2*1+0], c[5]) - ta33 - REAL_MUL(in[2*5+0], c[7]) + REAL_MUL(in[2*7+0], c[1]); |
|
|
1667 |
tmp1b = REAL_MUL(in[2*1+1], c[5]) - tb33 - REAL_MUL(in[2*5+1], c[7]) + REAL_MUL(in[2*7+1], c[1]); |
|
|
1668 |
tmp2a = - REAL_MUL(in[2*2+0], c[8]) - REAL_MUL(in[2*4+0], c[2]) + ta66 + REAL_MUL(in[2*8+0], c[4]); |
|
|
1669 |
tmp2b = - REAL_MUL(in[2*2+1], c[8]) - REAL_MUL(in[2*4+1], c[2]) + tb66 + REAL_MUL(in[2*8+1], c[4]); |
|
|
1670 |
|
|
|
1671 |
MACRO1(2); |
|
|
1672 |
MACRO2(6); |
|
|
1673 |
} |
|
|
1674 |
|
|
|
1675 |
{ |
|
|
1676 |
real tmp1a,tmp2a,tmp1b,tmp2b; |
|
|
1677 |
tmp1a = REAL_MUL(in[2*1+0], c[7]) - ta33 + REAL_MUL(in[2*5+0], c[1]) - REAL_MUL(in[2*7+0], c[5]); |
|
|
1678 |
tmp1b = REAL_MUL(in[2*1+1], c[7]) - tb33 + REAL_MUL(in[2*5+1], c[1]) - REAL_MUL(in[2*7+1], c[5]); |
|
|
1679 |
tmp2a = - REAL_MUL(in[2*2+0], c[4]) + REAL_MUL(in[2*4+0], c[8]) + ta66 - REAL_MUL(in[2*8+0], c[2]); |
|
|
1680 |
tmp2b = - REAL_MUL(in[2*2+1], c[4]) + REAL_MUL(in[2*4+1], c[8]) + tb66 - REAL_MUL(in[2*8+1], c[2]); |
|
|
1681 |
|
|
|
1682 |
MACRO1(3); |
|
|
1683 |
MACRO2(5); |
|
|
1684 |
} |
|
|
1685 |
|
|
|
1686 |
{ |
|
|
1687 |
real sum0,sum1; |
|
|
1688 |
sum0 = in[2*0+0] - in[2*2+0] + in[2*4+0] - in[2*6+0] + in[2*8+0]; |
|
|
1689 |
sum1 = REAL_MUL((in[2*0+1] - in[2*2+1] + in[2*4+1] - in[2*6+1] + in[2*8+1] ), tfcos36[4]); |
|
|
1690 |
MACRO0(4); |
|
|
1691 |
} |
|
|
1692 |
} |
|
|
1693 |
#endif |
|
|
1694 |
|
|
|
1695 |
} |
|
|
1696 |
} |
|
|
1697 |
|
|
|
1698 |
|
|
|
1699 |
/* new DCT12 */ |
|
|
1700 |
static void dct12(real *in,real *rawout1,real *rawout2,register real *wi,register real *ts) |
|
|
1701 |
{ |
|
|
1702 |
#define DCT12_PART1 \ |
|
|
1703 |
in5 = in[5*3]; \ |
|
|
1704 |
in5 += (in4 = in[4*3]); \ |
|
|
1705 |
in4 += (in3 = in[3*3]); \ |
|
|
1706 |
in3 += (in2 = in[2*3]); \ |
|
|
1707 |
in2 += (in1 = in[1*3]); \ |
|
|
1708 |
in1 += (in0 = in[0*3]); \ |
|
|
1709 |
\ |
|
|
1710 |
in5 += in3; in3 += in1; \ |
|
|
1711 |
\ |
|
|
1712 |
in2 = REAL_MUL(in2, COS6_1); \ |
|
|
1713 |
in3 = REAL_MUL(in3, COS6_1); |
|
|
1714 |
|
|
|
1715 |
#define DCT12_PART2 \ |
|
|
1716 |
in0 += REAL_MUL(in4, COS6_2); \ |
|
|
1717 |
\ |
|
|
1718 |
in4 = in0 + in2; \ |
|
|
1719 |
in0 -= in2; \ |
|
|
1720 |
\ |
|
|
1721 |
in1 += REAL_MUL(in5, COS6_2); \ |
|
|
1722 |
\ |
|
|
1723 |
in5 = REAL_MUL((in1 + in3), tfcos12[0]); \ |
|
|
1724 |
in1 = REAL_MUL((in1 - in3), tfcos12[2]); \ |
|
|
1725 |
\ |
|
|
1726 |
in3 = in4 + in5; \ |
|
|
1727 |
in4 -= in5; \ |
|
|
1728 |
\ |
|
|
1729 |
in2 = in0 + in1; \ |
|
|
1730 |
in0 -= in1; |
|
|
1731 |
|
|
|
1732 |
{ |
|
|
1733 |
real in0,in1,in2,in3,in4,in5; |
|
|
1734 |
register real *out1 = rawout1; |
|
|
1735 |
ts[SBLIMIT*0] = out1[0]; ts[SBLIMIT*1] = out1[1]; ts[SBLIMIT*2] = out1[2]; |
|
|
1736 |
ts[SBLIMIT*3] = out1[3]; ts[SBLIMIT*4] = out1[4]; ts[SBLIMIT*5] = out1[5]; |
|
|
1737 |
|
|
|
1738 |
DCT12_PART1 |
|
|
1739 |
|
|
|
1740 |
{ |
|
|
1741 |
real tmp0,tmp1 = (in0 - in4); |
|
|
1742 |
{ |
|
|
1743 |
real tmp2 = REAL_MUL((in1 - in5), tfcos12[1]); |
|
|
1744 |
tmp0 = tmp1 + tmp2; |
|
|
1745 |
tmp1 -= tmp2; |
|
|
1746 |
} |
|
|
1747 |
ts[(17-1)*SBLIMIT] = out1[17-1] + REAL_MUL(tmp0, wi[11-1]); |
|
|
1748 |
ts[(12+1)*SBLIMIT] = out1[12+1] + REAL_MUL(tmp0, wi[6+1]); |
|
|
1749 |
ts[(6 +1)*SBLIMIT] = out1[6 +1] + REAL_MUL(tmp1, wi[1]); |
|
|
1750 |
ts[(11-1)*SBLIMIT] = out1[11-1] + REAL_MUL(tmp1, wi[5-1]); |
|
|
1751 |
} |
|
|
1752 |
|
|
|
1753 |
DCT12_PART2 |
|
|
1754 |
|
|
|
1755 |
ts[(17-0)*SBLIMIT] = out1[17-0] + REAL_MUL(in2, wi[11-0]); |
|
|
1756 |
ts[(12+0)*SBLIMIT] = out1[12+0] + REAL_MUL(in2, wi[6+0]); |
|
|
1757 |
ts[(12+2)*SBLIMIT] = out1[12+2] + REAL_MUL(in3, wi[6+2]); |
|
|
1758 |
ts[(17-2)*SBLIMIT] = out1[17-2] + REAL_MUL(in3, wi[11-2]); |
|
|
1759 |
|
|
|
1760 |
ts[(6 +0)*SBLIMIT] = out1[6+0] + REAL_MUL(in0, wi[0]); |
|
|
1761 |
ts[(11-0)*SBLIMIT] = out1[11-0] + REAL_MUL(in0, wi[5-0]); |
|
|
1762 |
ts[(6 +2)*SBLIMIT] = out1[6+2] + REAL_MUL(in4, wi[2]); |
|
|
1763 |
ts[(11-2)*SBLIMIT] = out1[11-2] + REAL_MUL(in4, wi[5-2]); |
|
|
1764 |
} |
|
|
1765 |
|
|
|
1766 |
in++; |
|
|
1767 |
|
|
|
1768 |
{ |
|
|
1769 |
real in0,in1,in2,in3,in4,in5; |
|
|
1770 |
register real *out2 = rawout2; |
|
|
1771 |
|
|
|
1772 |
DCT12_PART1 |
|
|
1773 |
|
|
|
1774 |
{ |
|
|
1775 |
real tmp0,tmp1 = (in0 - in4); |
|
|
1776 |
{ |
|
|
1777 |
real tmp2 = REAL_MUL((in1 - in5), tfcos12[1]); |
|
|
1778 |
tmp0 = tmp1 + tmp2; |
|
|
1779 |
tmp1 -= tmp2; |
|
|
1780 |
} |
|
|
1781 |
out2[5-1] = REAL_MUL(tmp0, wi[11-1]); |
|
|
1782 |
out2[0+1] = REAL_MUL(tmp0, wi[6+1]); |
|
|
1783 |
ts[(12+1)*SBLIMIT] += REAL_MUL(tmp1, wi[1]); |
|
|
1784 |
ts[(17-1)*SBLIMIT] += REAL_MUL(tmp1, wi[5-1]); |
|
|
1785 |
} |
|
|
1786 |
|
|
|
1787 |
DCT12_PART2 |
|
|
1788 |
|
|
|
1789 |
out2[5-0] = REAL_MUL(in2, wi[11-0]); |
|
|
1790 |
out2[0+0] = REAL_MUL(in2, wi[6+0]); |
|
|
1791 |
out2[0+2] = REAL_MUL(in3, wi[6+2]); |
|
|
1792 |
out2[5-2] = REAL_MUL(in3, wi[11-2]); |
|
|
1793 |
|
|
|
1794 |
ts[(12+0)*SBLIMIT] += REAL_MUL(in0, wi[0]); |
|
|
1795 |
ts[(17-0)*SBLIMIT] += REAL_MUL(in0, wi[5-0]); |
|
|
1796 |
ts[(12+2)*SBLIMIT] += REAL_MUL(in4, wi[2]); |
|
|
1797 |
ts[(17-2)*SBLIMIT] += REAL_MUL(in4, wi[5-2]); |
|
|
1798 |
} |
|
|
1799 |
|
|
|
1800 |
in++; |
|
|
1801 |
|
|
|
1802 |
{ |
|
|
1803 |
real in0,in1,in2,in3,in4,in5; |
|
|
1804 |
register real *out2 = rawout2; |
|
|
1805 |
out2[12]=out2[13]=out2[14]=out2[15]=out2[16]=out2[17]=0.0; |
|
|
1806 |
|
|
|
1807 |
DCT12_PART1 |
|
|
1808 |
|
|
|
1809 |
{ |
|
|
1810 |
real tmp0,tmp1 = (in0 - in4); |
|
|
1811 |
{ |
|
|
1812 |
real tmp2 = REAL_MUL((in1 - in5), tfcos12[1]); |
|
|
1813 |
tmp0 = tmp1 + tmp2; |
|
|
1814 |
tmp1 -= tmp2; |
|
|
1815 |
} |
|
|
1816 |
out2[11-1] = REAL_MUL(tmp0, wi[11-1]); |
|
|
1817 |
out2[6 +1] = REAL_MUL(tmp0, wi[6+1]); |
|
|
1818 |
out2[0+1] += REAL_MUL(tmp1, wi[1]); |
|
|
1819 |
out2[5-1] += REAL_MUL(tmp1, wi[5-1]); |
|
|
1820 |
} |
|
|
1821 |
|
|
|
1822 |
DCT12_PART2 |
|
|
1823 |
|
|
|
1824 |
out2[11-0] = REAL_MUL(in2, wi[11-0]); |
|
|
1825 |
out2[6 +0] = REAL_MUL(in2, wi[6+0]); |
|
|
1826 |
out2[6 +2] = REAL_MUL(in3, wi[6+2]); |
|
|
1827 |
out2[11-2] = REAL_MUL(in3, wi[11-2]); |
|
|
1828 |
|
|
|
1829 |
out2[0+0] += REAL_MUL(in0, wi[0]); |
|
|
1830 |
out2[5-0] += REAL_MUL(in0, wi[5-0]); |
|
|
1831 |
out2[0+2] += REAL_MUL(in4, wi[2]); |
|
|
1832 |
out2[5-2] += REAL_MUL(in4, wi[5-2]); |
|
|
1833 |
} |
|
|
1834 |
} |
|
|
1835 |
|
|
|
1836 |
|
|
|
1837 |
static void III_hybrid(real fsIn[SBLIMIT][SSLIMIT], real tsOut[SSLIMIT][SBLIMIT], int ch,struct gr_info_s *gr_info, mpg123_handle *fr) |
|
|
1838 |
{ |
|
|
1839 |
real (*block)[2][SBLIMIT*SSLIMIT] = fr->hybrid_block; |
|
|
1840 |
int *blc = fr->hybrid_blc; |
|
|
1841 |
|
|
|
1842 |
real *tspnt = (real *) tsOut; |
|
|
1843 |
real *rawout1,*rawout2; |
|
|
1844 |
int bt = 0; |
|
|
1845 |
size_t sb = 0; |
|
|
1846 |
|
|
|
1847 |
{ |
|
|
1848 |
int b = blc[ch]; |
|
|
1849 |
rawout1=block[b][ch]; |
|
|
1850 |
b=-b+1; |
|
|
1851 |
rawout2=block[b][ch]; |
|
|
1852 |
blc[ch] = b; |
|
|
1853 |
} |
|
|
1854 |
|
|
|
1855 |
if(gr_info->mixed_block_flag) |
|
|
1856 |
{ |
|
|
1857 |
sb = 2; |
|
|
1858 |
opt_dct36(fr)(fsIn[0],rawout1,rawout2,win[0],tspnt); |
|
|
1859 |
opt_dct36(fr)(fsIn[1],rawout1+18,rawout2+18,win1[0],tspnt+1); |
|
|
1860 |
rawout1 += 36; rawout2 += 36; tspnt += 2; |
|
|
1861 |
} |
|
|
1862 |
|
|
|
1863 |
bt = gr_info->block_type; |
|
|
1864 |
if(bt == 2) |
|
|
1865 |
{ |
|
|
1866 |
for(; sbmaxb; sb+=2,tspnt+=2,rawout1+=36,rawout2+=36) |
|
|
1867 |
{ |
|
|
1868 |
dct12(fsIn[sb] ,rawout1 ,rawout2 ,win[2] ,tspnt); |
|
|
1869 |
dct12(fsIn[sb+1],rawout1+18,rawout2+18,win1[2],tspnt+1); |
|
|
1870 |
} |
|
|
1871 |
} |
|
|
1872 |
else |
|
|
1873 |
{ |
|
|
1874 |
for(; sbmaxb; sb+=2,tspnt+=2,rawout1+=36,rawout2+=36) |
|
|
1875 |
{ |
|
|
1876 |
opt_dct36(fr)(fsIn[sb],rawout1,rawout2,win[bt],tspnt); |
|
|
1877 |
opt_dct36(fr)(fsIn[sb+1],rawout1+18,rawout2+18,win1[bt],tspnt+1); |
|
|
1878 |
} |
|
|
1879 |
} |
|
|
1880 |
|
|
|
1881 |
for(;sb |
|
|
1882 |
{ |
|
|
1883 |
int i; |
|
|
1884 |
for(i=0;i |
|
|
1885 |
{ |
|
|
1886 |
tspnt[i*SBLIMIT] = *rawout1++; |
|
|
1887 |
*rawout2++ = DOUBLE_TO_REAL(0.0); |
|
|
1888 |
} |
|
|
1889 |
} |
|
|
1890 |
} |
|
|
1891 |
|
|
|
1892 |
|
|
|
1893 |
/* And at the end... the main layer3 handler */ |
|
|
1894 |
int do_layer3(mpg123_handle *fr) |
|
|
1895 |
{ |
|
|
1896 |
int gr, ch, ss,clip=0; |
|
|
1897 |
int scalefacs[2][39]; /* max 39 for short[13][3] mode, mixed: 38, long: 22 */ |
|
|
1898 |
struct III_sideinfo sideinfo; |
|
|
1899 |
int stereo = fr->stereo; |
|
|
1900 |
int single = fr->single; |
|
|
1901 |
int ms_stereo,i_stereo; |
|
|
1902 |
int sfreq = fr->sampling_frequency; |
|
|
1903 |
int stereo1,granules; |
|
|
1904 |
|
|
|
1905 |
if(stereo == 1) |
|
|
1906 |
{ /* stream is mono */ |
|
|
1907 |
stereo1 = 1; |
|
|
1908 |
single = SINGLE_LEFT; |
|
|
1909 |
} |
|
|
1910 |
else if(single != SINGLE_STEREO) /* stream is stereo, but force to mono */ |
|
|
1911 |
stereo1 = 1; |
|
|
1912 |
else |
|
|
1913 |
stereo1 = 2; |
|
|
1914 |
|
|
|
1915 |
if(fr->mode == MPG_MD_JOINT_STEREO) |
|
|
1916 |
{ |
|
|
1917 |
ms_stereo = (fr->mode_ext & 0x2)>>1; |
|
|
1918 |
i_stereo = fr->mode_ext & 0x1; |
|
|
1919 |
} |
|
|
1920 |
else ms_stereo = i_stereo = 0; |
|
|
1921 |
|
|
|
1922 |
granules = fr->lsf ? 1 : 2; |
|
|
1923 |
|
|
|
1924 |
/* quick hack to keep the music playing */ |
|
|
1925 |
/* after having seen this nasty test file... */ |
|
|
1926 |
if(III_get_side_info(fr, &sideinfo,stereo,ms_stereo,sfreq,single)) |
|
|
1927 |
{ |
|
|
1928 |
if(NOQUIET) error("bad frame - unable to get valid sideinfo"); |
|
|
1929 |
return clip; |
|
|
1930 |
} |
|
|
1931 |
|
|
|
1932 |
set_pointer(fr,sideinfo.main_data_begin); |
|
|
1933 |
|
|
|
1934 |
for(gr=0;gr |
|
|
1935 |
{ |
|
|
1936 |
ALIGNED(16) real hybridIn[2][SBLIMIT][SSLIMIT]; |
|
|
1937 |
ALIGNED(16) real hybridOut[2][SSLIMIT][SBLIMIT]; |
|
|
1938 |
|
|
|
1939 |
{ |
|
|
1940 |
struct gr_info_s *gr_info = &(sideinfo.ch[0].gr[gr]); |
|
|
1941 |
long part2bits; |
|
|
1942 |
if(fr->lsf) |
|
|
1943 |
part2bits = III_get_scale_factors_2(fr, scalefacs[0],gr_info,0); |
|
|
1944 |
else |
|
|
1945 |
part2bits = III_get_scale_factors_1(fr, scalefacs[0],gr_info,0,gr); |
|
|
1946 |
|
|
|
1947 |
if(III_dequantize_sample(fr, hybridIn[0], scalefacs[0],gr_info,sfreq,part2bits)) |
|
|
1948 |
{ |
|
|
1949 |
if(VERBOSE2) error("dequantization failed!"); |
|
|
1950 |
return clip; |
|
|
1951 |
} |
|
|
1952 |
} |
|
|
1953 |
|
|
|
1954 |
if(stereo == 2) |
|
|
1955 |
{ |
|
|
1956 |
struct gr_info_s *gr_info = &(sideinfo.ch[1].gr[gr]); |
|
|
1957 |
long part2bits; |
|
|
1958 |
if(fr->lsf) |
|
|
1959 |
part2bits = III_get_scale_factors_2(fr, scalefacs[1],gr_info,i_stereo); |
|
|
1960 |
else |
|
|
1961 |
part2bits = III_get_scale_factors_1(fr, scalefacs[1],gr_info,1,gr); |
|
|
1962 |
|
|
|
1963 |
if(III_dequantize_sample(fr, hybridIn[1],scalefacs[1],gr_info,sfreq,part2bits)) |
|
|
1964 |
{ |
|
|
1965 |
if(VERBOSE2) error("dequantization failed!"); |
|
|
1966 |
return clip; |
|
|
1967 |
} |
|
|
1968 |
|
|
|
1969 |
if(ms_stereo) |
|
|
1970 |
{ |
|
|
1971 |
int i; |
|
|
1972 |
unsigned int maxb = sideinfo.ch[0].gr[gr].maxb; |
|
|
1973 |
if(sideinfo.ch[1].gr[gr].maxb > maxb) maxb = sideinfo.ch[1].gr[gr].maxb; |
|
|
1974 |
|
|
|
1975 |
for(i=0;i |
|
|
1976 |
{ |
|
|
1977 |
real tmp0 = ((real *)hybridIn[0])[i]; |
|
|
1978 |
real tmp1 = ((real *)hybridIn[1])[i]; |
|
|
1979 |
((real *)hybridIn[0])[i] = tmp0 + tmp1; |
|
|
1980 |
((real *)hybridIn[1])[i] = tmp0 - tmp1; |
|
|
1981 |
} |
|
|
1982 |
} |
|
|
1983 |
|
|
|
1984 |
if(i_stereo) III_i_stereo(hybridIn,scalefacs[1],gr_info,sfreq,ms_stereo,fr->lsf); |
|
|
1985 |
|
|
|
1986 |
if(ms_stereo || i_stereo || (single == SINGLE_MIX) ) |
|
|
1987 |
{ |
|
|
1988 |
if(gr_info->maxb > sideinfo.ch[0].gr[gr].maxb) |
|
|
1989 |
sideinfo.ch[0].gr[gr].maxb = gr_info->maxb; |
|
|
1990 |
else |
|
|
1991 |
gr_info->maxb = sideinfo.ch[0].gr[gr].maxb; |
|
|
1992 |
} |
|
|
1993 |
|
|
|
1994 |
switch(single) |
|
|
1995 |
{ |
|
|
1996 |
case SINGLE_MIX: |
|
|
1997 |
{ |
|
|
1998 |
register int i; |
|
|
1999 |
register real *in0 = (real *) hybridIn[0],*in1 = (real *) hybridIn[1]; |
|
|
2000 |
for(i=0;imaxb;i++,in0++) |
|
|
2001 |
*in0 = (*in0 + *in1++); /* *0.5 done by pow-scale */ |
|
|
2002 |
} |
|
|
2003 |
break; |
|
|
2004 |
case SINGLE_RIGHT: |
|
|
2005 |
{ |
|
|
2006 |
register int i; |
|
|
2007 |
register real *in0 = (real *) hybridIn[0],*in1 = (real *) hybridIn[1]; |
|
|
2008 |
for(i=0;imaxb;i++) |
|
|
2009 |
*in0++ = *in1++; |
|
|
2010 |
} |
|
|
2011 |
break; |
|
|
2012 |
} |
|
|
2013 |
} |
|
|
2014 |
|
|
|
2015 |
for(ch=0;ch |
|
|
2016 |
{ |
|
|
2017 |
struct gr_info_s *gr_info = &(sideinfo.ch[ch].gr[gr]); |
|
|
2018 |
III_antialias(hybridIn[ch],gr_info); |
|
|
2019 |
III_hybrid(hybridIn[ch], hybridOut[ch], ch,gr_info, fr); |
|
|
2020 |
} |
|
|
2021 |
|
|
|
2022 |
#ifdef OPT_I486 |
|
|
2023 |
if(single != SINGLE_STEREO || fr->af.encoding != MPG123_ENC_SIGNED_16 || fr->down_sample != 0) |
|
|
2024 |
{ |
|
|
2025 |
#endif |
|
|
2026 |
for(ss=0;ss |
|
|
2027 |
{ |
|
|
2028 |
if(single != SINGLE_STEREO) |
|
|
2029 |
clip += (fr->synth_mono)(hybridOut[0][ss], fr); |
|
|
2030 |
else |
|
|
2031 |
clip += (fr->synth_stereo)(hybridOut[0][ss], hybridOut[1][ss], fr); |
|
|
2032 |
|
|
|
2033 |
} |
|
|
2034 |
#ifdef OPT_I486 |
|
|
2035 |
} else |
|
|
2036 |
{ |
|
|
2037 |
/* Only stereo, 16 bits benefit from the 486 optimization. */ |
|
|
2038 |
ss=0; |
|
|
2039 |
while(ss < SSLIMIT) |
|
|
2040 |
{ |
|
|
2041 |
int n; |
|
|
2042 |
n=(fr->buffer.size - fr->buffer.fill) / (2*2*32); |
|
|
2043 |
if(n > (SSLIMIT-ss)) n=SSLIMIT-ss; |
|
|
2044 |
|
|
|
2045 |
/* Clip counting makes no sense with this function. */ |
|
|
2046 |
absynth_1to1_i486(hybridOut[0][ss], 0, fr, n); |
|
|
2047 |
absynth_1to1_i486(hybridOut[1][ss], 1, fr, n); |
|
|
2048 |
ss+=n; |
|
|
2049 |
fr->buffer.fill+=(2*2*32)*n; |
|
|
2050 |
} |
|
|
2051 |
} |
|
|
2052 |
#endif |
|
|
2053 |
} |
|
|
2054 |
|
|
|
2055 |
return clip; |
|
|
2056 |
} |