3 /********************************************************************
5 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
6 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
7 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
8 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
10 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 *
11 * by the Xiph.Org Foundation https://xiph.org/ *
13 ********************************************************************
15 function: lookup data; generated by lookups.pl; edit there
17 ********************************************************************/
19 #ifndef _V_LOOKUP_DATA_H_
37 print "#define COS_LOOKUP_SZ $cos_sz\n";
38 print "static float COS_LOOKUP[COS_LOOKUP_SZ+1]={\n";
40 for($i=0;$i<=$cos_sz;){
42 for($j=0;$j<4 && $i<=$cos_sz;$j++){
43 printf "%+.13f,", cos(3.14159265358979323846*($i++)/$cos_sz) ;
49 print "#define INVSQ_LOOKUP_SZ $invsq_sz\n";
50 print "static float INVSQ_LOOKUP[INVSQ_LOOKUP_SZ+1]={\n";
52 for($i=0;$i<=$invsq_sz;){
54 for($j=0;$j<4 && $i<=$invsq_sz;$j++){
55 my$indexmap=$i++/$invsq_sz*.5+.5;
56 printf "%.12f,", 1./sqrt($indexmap);
62 print "#define INVSQ2EXP_LOOKUP_MIN $invsq2exp_min\n";
63 print "#define INVSQ2EXP_LOOKUP_MAX $invsq2exp_max\n";
64 print "static float INVSQ2EXP_LOOKUP[INVSQ2EXP_LOOKUP_MAX-\\\n".
65 " INVSQ2EXP_LOOKUP_MIN+1]={\n";
67 for($i=$invsq2exp_min;$i<=$invsq2exp_max;){
69 for($j=0;$j<4 && $i<=$invsq2exp_max;$j++){
70 printf "%15.10g,", 2**($i++*-.5);
74 print "};\n\n#endif\n\n";
78 $fromdB2_sz=1<<$fromdB_shift;
79 $fromdB_gran=1<<($fromdB_shift-$fromdB2_shift);
80 print "#define FROMdB_LOOKUP_SZ $fromdB_sz\n";
81 print "#define FROMdB2_LOOKUP_SZ $fromdB2_sz\n";
82 print "#define FROMdB_SHIFT $fromdB_shift\n";
83 print "#define FROMdB2_SHIFT $fromdB2_shift\n";
84 print "#define FROMdB2_MASK ".((1<<$fromdB_shift)-1)."\n";
86 print "static float FROMdB_LOOKUP[FROMdB_LOOKUP_SZ]={\n";
88 for($i=0;$i<$fromdB_sz;){
90 for($j=0;$j<4 && $i<$fromdB_sz;$j++){
91 printf "%15.10g,", 10**(.05*(-$fromdB_gran*$i++));
97 print "static float FROMdB2_LOOKUP[FROMdB2_LOOKUP_SZ]={\n";
99 for($i=0;$i<$fromdB2_sz;){
101 for($j=0;$j<4 && $i<$fromdB_sz;$j++){
102 printf "%15.10g,", 10**(.05*(-$fromdB_gran/$fromdB2_sz*(.5+$i++)));
106 print "};\n\n#ifdef INT_LOOKUP\n\n";
109 $iisz=0x10000>>$invsq_i_shift;
110 print "#define INVSQ_LOOKUP_I_SHIFT $invsq_i_shift\n";
111 print "#define INVSQ_LOOKUP_I_MASK ".(0x0ffff>>(16-$invsq_i_shift))."\n";
112 print "static long INVSQ_LOOKUP_I[$iisz+1]={\n";
113 for($i=0;$i<=$iisz;){
115 for($j=0;$j<4 && $i<=$iisz;$j++){
116 my$indexmap=$i++/$iisz*.5+.5;
117 printf "%8d,", int(1./sqrt($indexmap)*65536.+.5);
123 $cisz=0x10000>>$cos_i_shift;
124 print "#define COS_LOOKUP_I_SHIFT $cos_i_shift\n";
125 print "#define COS_LOOKUP_I_MASK ".(0x0ffff>>(16-$cos_i_shift))."\n";
126 print "#define COS_LOOKUP_I_SZ $cisz\n";
127 print "static long COS_LOOKUP_I[COS_LOOKUP_I_SZ+1]={\n";
129 for($i=0;$i<=$cisz;){
131 for($j=0;$j<4 && $i<=$cisz;$j++){
132 printf "%8d,", int(cos(3.14159265358979323846*($i++)/$cos_sz)*16384.+.5) ;
139 print "#endif\n\n#endif\n";