claunia/cuetools.net
1
0
Fork 0
mirror of https://github.com/claunia/cuetools.net.git synced 2025-12-16 18:14:25 +00:00
Code Issues Packages Projects Releases Wiki Activity

flake optimized

Browse Source
This commit is contained in:
chudov
2009-08-26 17:30:17 +00:00
parent c1c83e9e5f
commit 108c9c328c
6 changed files with 203 additions and 136 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
CUETools.Codecs.FLAKE/lpc.cs
View File

@@ -29,6 +29,7 @@ namespace CUETools.Codecs.FLAKE
{
public const int MAX_LPC_ORDER = 32;
public const int MAX_LPC_WINDOWS = 4;
public const int MAX_LPC_PRECISIONS = 4;
/**
* Apply Welch window function to audio block
@@ -50,7 +51,7 @@ namespace CUETools.Codecs.FLAKE
* A Welch window function is applied before calculation.
*/
static public unsafe void
compute_autocorr(/*const*/ int* data, uint len, uint lag, double* autoc, double* window)
compute_autocorr(/*const*/ int* data, uint len, uint min, uint lag, double* autoc, double* window)
{
double* data1 = stackalloc double[(int)len + 16];
uint i, j;
@@ -65,7 +66,7 @@ namespace CUETools.Codecs.FLAKE
}
data1[len] = 0;
for (i = 0; i <= lag; ++i)
for (i = min; i <= lag; ++i)
{
temp = 1.0;
temp2 = 1.0;
@@ -289,10 +290,10 @@ namespace CUETools.Codecs.FLAKE
{
double* autoc = stackalloc double[MAX_LPC_ORDER + 1];
compute_autocorr(samples, blocksize, max_order + 1, autoc, window);
compute_autocorr(samples, blocksize, 0, max_order, autoc, window);
uint opt_order = max_order;
if (omethod == OrderMethod.Estimate || omethod == OrderMethod.EstSearch)
if (omethod == OrderMethod.Estimate)
opt_order = compute_lpc_coefs_est(autoc, max_order, lpcs);
else
compute_lpc_coefs(autoc, max_order, null, lpcs);