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authorMichael Niedermayer <michaelni@gmx.at>2006-07-14 10:03:09 +0000
committerMichael Niedermayer <michaelni@gmx.at>2006-07-14 10:03:09 +0000
commit82ab5ad7b2e23515a0e83a0434a5b32cc44a1b31 (patch)
tree6dd5dfbcd2f121a1c69e1472709b09258d7cacdc /libavutil/lls.h
parent29e4710a702a300e19923e6e9ae1057dd3d8e610 (diff)
downloadffmpeg-82ab5ad7b2e23515a0e83a0434a5b32cc44a1b31.tar.gz
linear least squares solver using cholesky factorization
Originally committed as revision 5740 to svn://svn.ffmpeg.org/ffmpeg/trunk
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+/*
+ * linear least squares model
+ *
+ * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef LLS_H
+#define LLS_H
+
+#define MAX_VARS 32
+
+//FIXME avoid direct access to LLSModel from outside
+
+/**
+ * Linear least squares model.
+ */
+typedef struct LLSModel{
+ double covariance[MAX_VARS+1][MAX_VARS+1];
+ double coeff[MAX_VARS];
+ int indep_count;
+}LLSModel;
+
+void av_init_lls(LLSModel *m, int indep_count);
+void av_update_lls(LLSModel *m, double *param, double decay);
+double av_solve_lls(LLSModel *m, double threshold);
+double av_evaluate_lls(LLSModel *m, double *param);
+
+#endif