static Node *
decl()
{
Node *n, *init;
char *name;
CTy *type, *basety;
SrcPos *pos;
Sym *sym;
Vec *syms;
int sclass;
pos = &tok->pos;
syms = vec();
basety = declspecs(&sclass);
while(tok->k != ';' && tok->k != TOKEOF) {
type = declarator(basety, &name, &init);
switch(sclass){
case SCNONE:
if(isglobal()) {
sclass = SCGLOBAL;
} else {
sclass = SCAUTO;
}
break;
case SCTYPEDEF:
if(init)
errorposf(pos, "typedef cannot have an initializer");
break;
}
if(!name)
errorposf(pos, "decl needs to specify a name");
sym = definesym(pos, sclass, name, type, init);
vecappend(syms, sym);
if(isglobal() && tok->k == '{') {
if(init)
errorposf(pos, "function declaration has an initializer");
if(type->t != CFUNC)
errorposf(pos, "expected a function");
curfunc = mknode(NFUNC, pos);
curfunc->type = type;
curfunc->Func.name = name;
curfunc->Func.params = vec();
curfunc->Func.stkslots = vec();
fbody();
definesym(pos, sclass, name, type, curfunc);
curfunc = 0;
goto done;
}
if(tok->k == ',')
next();
else
break;
}
expect(';');
done:
n = mknode(NDECL, pos);
n->Decl.syms = syms;
return n;
}
static void test_resampler(void)
{
std::string fbody("sweep_440-3520_1s");
mcon::Vector<double> input;
mfio::Wave wave;
wave.Read(fbody + std::string(".wav"), input);
const int baseFs = wave.GetSamplingRate();
const int targetFs = 16000;
const double fp = 0.35;
const double fs = 0.45;
masp::Resampler resampler(targetFs, baseFs, fp, fs);
resampler.MakeFilterByWindowType(masp::Resampler::HANNING);
{
mcon::Vector<double> coefs;
resampler.GetCoefficients(coefs);
LOG("Length=%d\n", static_cast<int>(coefs.GetLength()));
}
{
mcon::Vector<double> output;
resampler.Convert(output, input);
output *= 32767.0/output.GetMaximumAbsolute();
mfio::Wave w(targetFs, wave.GetNumChannels(), wave.GetBitDepth());
w.Write(fbody + std::string("_resampled1.wav"), output);
}
const double ripple = 0.01;
const double decay = 80;
resampler.MakeFilterBySpec(ripple, decay);
{
mcon::Vector<double> coefs;
resampler.GetCoefficients(coefs);
LOG("Length=%d\n", static_cast<int>(coefs.GetLength()));
}
{
mcon::Vector<double> output;
resampler.Convert(output, input);
output *= 32767.0/output.GetMaximumAbsolute();
mfio::Wave w(targetFs, wave.GetNumChannels(), wave.GetBitDepth());
w.Write(fbody + std::string("_resampled2.wav"), output);
}
// サンプルの数を変更する
// ==> 実質的に周波数変換？
// ==> 違う気がする...
{
const int N = 100;
const double ratio = 1.5;
const double fp = 0.35;
const double fs = 0.45;
const double ripple = 0.01;
const double decay = 80;
mcon::Vector<double> src(N);
for (int k = 0; k < N; ++k)
{
src[k] = k;
}
resampler.Initialize(static_cast<int>(ratio * N), N, fp, fs);
resampler.MakeFilterBySpec(ripple, decay);
mcon::Vector<double> dst;
resampler.Convert(dst, src);
mfio::Csv::Write("sample_count_convert.csv", dst);
}
}