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CUETools.DSP.Resampler: split classes into separate files.

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This commit is contained in:
karamanolev
2011-10-24 15:45:37 +00:00
parent 7a6e2eb5aa
commit 5c3afc77be
18 changed files with 1150 additions and 1101 deletions
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44
CUETools.DSP.Resampler/Internal/poly_fir1_1_t.cs Normal file
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namespace CUETools.DSP.Resampler.Internal
{
class poly_fir1_1_t : poly_fir1_t
{
const int COEF_INTERP = 1;
const double MULT32 = (65536.0 * 65536.0);
internal poly_fir1_1_t(int phase_bits)
: base(phase_bits)
{
}
internal unsafe override void fn(stage_t p, fifo_t output_fifo)
{
int i, num_in = p.occupancy, max_num_out = (int)(1 + num_in * p.out_in_ratio);
int output_offs = output_fifo.reserve(max_num_out);
fixed (byte* pinput = &p.fifo.data[p.offset], poutput = &output_fifo.data[output_offs])
{
double* input = (double*)pinput;
double* output = (double*)poutput;
for (i = 0; (p.at >> 32) < num_in; ++i, p.at += p.step)
{
double* at = input + (p.at >> 32);
uint fraction = (uint)(p.at & 0xffffffff);
int phase = (int)(fraction >> (32 - phase_bits));
double x = (double)(fraction << phase_bits) * (1 / MULT32);
double sum = 0;
for (int j = 0; j < pf.num_coefs; j++)
{
double a = p.shared.poly_fir_coefs[poly_fir1_t.coef_idx(COEF_INTERP, pf.num_coefs, phase, 0, j)];
double b = p.shared.poly_fir_coefs[poly_fir1_t.coef_idx(COEF_INTERP, pf.num_coefs, phase, 1, j)];
sum += (b * x + a) * at[j];
}
output[i] = sum;
}
//assert(max_num_out - i >= 0);
output_fifo.trim_by(max_num_out - i);
p.fifo.read((int)(p.at >> 32), null);
p.at &= 0xffffffff;
}
}
}
}