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CUETools.Flake: better use of new window functions

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This commit is contained in:
Grigory Chudov
2014-12-08 22:18:34 -05:00
parent c671f200df
commit 6201101ccf
14 changed files with 679 additions and 707 deletions
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24
CUETools.Codecs/LPC.cs
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@@ -5,9 +5,9 @@ namespace CUETools.Codecs
public class lpc
{
public const int MAX_LPC_ORDER = 32;
public const int MAX_LPC_WINDOWS = 8;
public const int MAX_LPC_WINDOWS = 16;
public const int MAX_LPC_PRECISIONS = 4;
public const int MAX_LPC_SECTIONS = 32;
public const int MAX_LPC_SECTIONS = 128;
public unsafe static void window_welch(float* window, int L)
{
@@ -47,9 +47,8 @@ namespace CUETools.Codecs
window[n] = (float)(1.0 - 1.93 * Math.Cos(2.0 * Math.PI * n / N) + 1.29 * Math.Cos(4.0 * Math.PI * n / N) - 0.388 * Math.Cos(6.0 * Math.PI * n / N) + 0.0322 * Math.Cos(8.0 * Math.PI * n / N));
}
public unsafe static void window_tukey(float* window, int L)
public unsafe static void window_tukey(float* window, int L, double p)
{
double p = 0.5;
int z = 0;
int Np = (int)(p / 2.0 * L) - z;
if (Np > 0)
@@ -63,28 +62,29 @@ namespace CUETools.Codecs
}
}
public unsafe static void window_punchout_tukey(float* window, int L, double p, double start, double end)
public unsafe static void window_punchout_tukey(float* window, int L, double p, double p1, double start, double end)
{
int start_n = (int)(start * L);
int end_n = (int)(end * L);
int Np = (int)(p / 2.0 * L);
int Np1 = (int)(p1 / 2.0 * L);
int i, n = 0;
if (start_n != 0)
{
for (i = 1; n < Np; n++, i++)
window[n] = (float)(0.5 - 0.5 * Math.Cos(Math.PI * i / Np));
for (; n < start_n - Np; n++)
for (; n < start_n - Np1; n++)
window[n] = 1.0f;
for (i = Np; n < start_n; n++, i--)
window[n] = (float)(0.5 - 0.5 * Math.Cos(Math.PI * i / Np));
for (i = Np1; n < start_n; n++, i--)
window[n] = (float)(0.5 - 0.5 * Math.Cos(Math.PI * i / Np1));
}
for (; n < end_n; n++)
window[n] = 0.0f;
if (end_n != L)
{
for (i = 1; n < end_n + Np; n++, i++)
window[n] = (float)(0.5 - 0.5 * Math.Cos(Math.PI * i / Np));
for (i = 1; n < end_n + Np1; n++, i++)
window[n] = (float)(0.5 - 0.5 * Math.Cos(Math.PI * i / Np1));
for (; n < L - Np; n++)
window[n] = 1.0f;
for (i = Np; n < L; n++, i--)
@@ -358,11 +358,11 @@ namespace CUETools.Codecs
}
static public unsafe void
compute_autocorr_glue(/*const*/ int* data, float* window, int offs, int sz, int min, int lag, double* autoc)
compute_autocorr_glue(/*const*/ int* data, float* window, int offs, int offs1, int min, int lag, double* autoc)
{
double* data1 = stackalloc double[lag + lag];
for (int i = -lag; i < lag; i++)
data1[i + lag] = offs + i >= 0 && offs + i < sz ? data[offs + i] * window[offs + i] : 0;
data1[i + lag] = offs + i >= 0 && offs + i < offs1 ? data[offs + i] * window[offs + i] : 0;
for (int i = min; i <= lag; ++i)
{
double temp = 0;