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URL https://opencores.org/ocsvn/sqmusic/sqmusic/trunk

Subversion Repositories sqmusic

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  • This comparison shows the changes necessary to convert path 
    /sqmusic/trunk/cpp
    from Rev 17 to Rev 18
    ↔ Reverse comparison
  •

Rev 17 → Rev 18

/args.h
47,12 → 47,20
argument_t* def_arg;
std::string program_name;
argument_t help_arg;
void clean_args() {
for( int j=0; j<legal_args.size(); j++ ) {
argument_t& a = *legal_args[j];
if( a.short_name=="-h" && a.long_name!="help" )
{ help_arg.short_name.clear(); break; } // remove -h for help if already used
}
}
void throw_error( std::string x ) /*throw const char**/ { throw x.c_str(); }
public:
void throw_error( std::string x ) /*throw const char**/ { throw x.c_str(); }
Args( int argc, char *argv[], arg_vector_t& legal_args ) //throw const char *
: legal_args( legal_args ),
help_arg( legal_args, "help", argument_t::flag, "Display usage information")
{
{
clean_args(); // eliminate duplicated values
// look for default argument
def_arg=NULL;
for( int j=0; j<legal_args.size(); j++ ) {
132,7 → 140,7
std::cout << "\t";
std::string aux;
if( !a.long_name.empty() ) aux = a.long_name;
if( !a.long_name.empty() && !a.long_name.empty() ) aux += " | ";
if( !a.long_name.empty() && !a.short_name.empty() ) aux += " | ";
if( !a.short_name.empty() ) aux+= a.short_name;
std::cout << brackets( a, aux );
switch( a.type ) {
/sintable.cc
0,0 → 1,121
/*
sintable: sine wave table generator
Based on MAME's fm.c file.
 
(c) Jose Tejada Gomez, May 2013
You can use this file following the GNU GENERAL PUBLIC LICENSE version 3
Read the details of the license in:
http://www.gnu.org/licenses/gpl.txt
Send comments to: jose.tejada at ieee.org
 
*/
 
#include <iostream>
#include <cmath>
#include "../cpp/args.h"
 
using namespace std;
 
#define ENV_BITS 10
#define ENV_LEN (1<<ENV_BITS)
#define ENV_STEP (128.0/ENV_LEN)
#define TL_RES_LEN (256) /* 8 bits addressing (real chip) */
#define SIN_BITS 10
#define SIN_LEN (1<<SIN_BITS)
#define SIN_MASK (SIN_LEN-1)
 
signed int tl_tab[TL_RES_LEN];
unsigned int sin_tab[SIN_LEN];
 
void init_tables(void) // copied from fm.c
{
signed int i,x;
signed int n;
double o,m;
 
for (x=0; x<TL_RES_LEN; x++)
{
m = (1<<16) / pow(2, (x+1) * (ENV_STEP/4.0) / 8.0);
m = floor(m);
 
/* we never reach (1<<16) here due to the (x+1) */
/* result fits within 16 bits at maximum */
 
n = (int)m; /* 16 bits here */
n >>= 4; /* 12 bits here */
if (n&1) /* round to nearest */
n = (n>>1)+1;
else
n = n>>1;
/* 11 bits here (rounded) */
n <<= 2; /* 13 bits here (as in real chip) */
tl_tab[ x ] = n;
}
 
for (i=0; i<SIN_LEN; i++)
{
/* non-standard sinus */
m = sin( ((i*2)+1) * M_PI / SIN_LEN ); /* checked against the real chip */
 
/* we never reach zero here due to ((i*2)+1) */
if (m>0.0)
o = 8*log(1.0/m)/log(2.0); /* convert to 'decibels' */
else
o = 8*log(-1.0/m)/log(2.0); /* convert to 'decibels' */
 
o = o / (ENV_STEP/4);
 
n = (int)(2.0*o);
if (n&1) /* round to nearest */
n = (n>>1)+1;
else
n = n>>1;
 
sin_tab[ i ] = n*2 + (m>=0.0? 0: 1 );
/*logerror("FM.C: sin [%4i]= %4i (tl_tab value=%5i)\n", i, sin_tab[i],tl_tab[sin_tab[i]]);*/
}
}
 
void dump_tl_tab() {
for( int i=0; i<TL_RES_LEN; i++ ) {
cout << tl_tab[i] << "\n";
}
}
 
void dump_sin_tab() {
for( int i=0; i<SIN_LEN; i++ ) {
cout << sin_tab[i] << "\n";
}
}
 
void dump_composite() {
// cout.setf( ios::hex, ios::basefield );
for( int i=0; i<SIN_LEN; i++ ) {
cout << sin_tab[i] << "," << tl_tab[ sin_tab[i] ] << "\n";
}
}
 
unsigned conv( double x ) {
double xmax = 0xFFFFF; // 20 bits, all ones
return (unsigned)(xmax* 20*log(x+0.5));
}
 
int main(int argc, char *argv[]) {
arg_vector_t legal_args;
argument_t arg_hex( legal_args, "hex", argument_t::flag,
"set output to hexadecimal mode" );
argument_t arg_sin( legal_args, "sin", argument_t::flag,
"dump sine wave" );
argument_t arg_pow( legal_args, "pow", argument_t::flag,
"dump power table" );
Args args_parser( argc, argv, legal_args );
if( args_parser.help_request() ) { return 0; }
if( argc==1 ) { args_parser.show_help(); return 0; }
init_tables();
//dump_composite();
if( arg_hex.is_set() ) cout.setf( ios::hex, ios::basefield );
if( arg_pow.is_set() ) dump_tl_tab();
if( arg_sin.is_set() ) dump_sin_tab();
return 0;
}

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