[FFmpeg-devel] [PATCH 1/2] avutil: rename lls to lls2

Michael Niedermayer michaelni at gmx.at
Sat Nov 16 00:01:10 CET 2013


Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
---
 libavcodec/lpc.c         |    2 +-
 libavutil/Makefile       |    4 +-
 libavutil/lls.c          |  179 ----------------------------------------------
 libavutil/lls.h          |   71 ------------------
 libavutil/lls2.c         |  179 ++++++++++++++++++++++++++++++++++++++++++++++
 libavutil/lls2.h         |   71 ++++++++++++++++++
 libavutil/x86/lls_init.c |    2 +-
 7 files changed, 254 insertions(+), 254 deletions(-)
 delete mode 100644 libavutil/lls.c
 delete mode 100644 libavutil/lls.h
 create mode 100644 libavutil/lls2.c
 create mode 100644 libavutil/lls2.h

diff --git a/libavcodec/lpc.c b/libavcodec/lpc.c
index 1d52edf..1989030 100644
--- a/libavcodec/lpc.c
+++ b/libavcodec/lpc.c
@@ -20,7 +20,7 @@
  */
 
 #include "libavutil/common.h"
-#include "libavutil/lls.h"
+#include "libavutil/lls2.h"
 
 #define LPC_USE_DOUBLE
 #include "lpc.h"
diff --git a/libavutil/Makefile b/libavutil/Makefile
index 7b3b439..5d42893 100644
--- a/libavutil/Makefile
+++ b/libavutil/Makefile
@@ -90,7 +90,7 @@ OBJS = adler32.o                                                        \
        intfloat_readwrite.o                                             \
        intmath.o                                                        \
        lfg.o                                                            \
-       lls.o                                                            \
+       lls2.o                                                           \
        log.o                                                            \
        log2_tab.o                                                       \
        mathematics.o                                                    \
@@ -143,7 +143,7 @@ TESTPROGS = adler32                                                     \
             fifo                                                        \
             hmac                                                        \
             lfg                                                         \
-            lls                                                         \
+            lls2                                                        \
             md5                                                         \
             murmur3                                                     \
             opt                                                         \
diff --git a/libavutil/lls.c b/libavutil/lls.c
deleted file mode 100644
index abed8ef..0000000
--- a/libavutil/lls.c
+++ /dev/null
@@ -1,179 +0,0 @@
-/*
- * linear least squares model
- *
- * Copyright (c) 2006 Michael Niedermayer <michaelni at gmx.at>
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg 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 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg 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 FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * @file
- * linear least squares model
- */
-
-#include <math.h>
-#include <string.h>
-
-#include "attributes.h"
-#include "version.h"
-#include "lls.h"
-
-static void update_lls(LLSModel *m, double *var)
-{
-    int i, j;
-
-    for (i = 0; i <= m->indep_count; i++) {
-        for (j = i; j <= m->indep_count; j++) {
-            m->covariance[i][j] += var[i] * var[j];
-        }
-    }
-}
-
-void avpriv_solve_lls(LLSModel *m, double threshold, unsigned short min_order)
-{
-    int i, j, k;
-    double (*factor)[MAX_VARS_ALIGN] = (void *) &m->covariance[1][0];
-    double (*covar) [MAX_VARS_ALIGN] = (void *) &m->covariance[1][1];
-    double *covar_y                = m->covariance[0];
-    int count                      = m->indep_count;
-
-    for (i = 0; i < count; i++) {
-        for (j = i; j < count; j++) {
-            double sum = covar[i][j];
-
-            for (k = i - 1; k >= 0; k--)
-                sum -= factor[i][k] * factor[j][k];
-
-            if (i == j) {
-                if (sum < threshold)
-                    sum = 1.0;
-                factor[i][i] = sqrt(sum);
-            } else {
-                factor[j][i] = sum / factor[i][i];
-            }
-        }
-    }
-
-    for (i = 0; i < count; i++) {
-        double sum = covar_y[i + 1];
-
-        for (k = i - 1; k >= 0; k--)
-            sum -= factor[i][k] * m->coeff[0][k];
-
-        m->coeff[0][i] = sum / factor[i][i];
-    }
-
-    for (j = count - 1; j >= min_order; j--) {
-        for (i = j; i >= 0; i--) {
-            double sum = m->coeff[0][i];
-
-            for (k = i + 1; k <= j; k++)
-                sum -= factor[k][i] * m->coeff[j][k];
-
-            m->coeff[j][i] = sum / factor[i][i];
-        }
-
-        m->variance[j] = covar_y[0];
-
-        for (i = 0; i <= j; i++) {
-            double sum = m->coeff[j][i] * covar[i][i] - 2 * covar_y[i + 1];
-
-            for (k = 0; k < i; k++)
-                sum += 2 * m->coeff[j][k] * covar[k][i];
-
-            m->variance[j] += m->coeff[j][i] * sum;
-        }
-    }
-}
-
-static double evaluate_lls(LLSModel *m, double *param, int order)
-{
-    int i;
-    double out = 0;
-
-    for (i = 0; i <= order; i++)
-        out += param[i] * m->coeff[order][i];
-
-    return out;
-}
-
-av_cold void avpriv_init_lls(LLSModel *m, int indep_count)
-{
-    memset(m, 0, sizeof(LLSModel));
-    m->indep_count = indep_count;
-    m->update_lls = update_lls;
-    m->evaluate_lls = evaluate_lls;
-    if (ARCH_X86)
-        ff_init_lls_x86(m);
-}
-
-#if FF_API_LLS_PRIVATE
-av_cold void av_init_lls(LLSModel *m, int indep_count)
-{
-    avpriv_init_lls(m, indep_count);
-}
-void av_update_lls(LLSModel *m, double *param, double decay)
-{
-    m->update_lls(m, param);
-}
-void av_solve_lls(LLSModel *m, double threshold, int min_order)
-{
-    avpriv_solve_lls(m, threshold, min_order);
-}
-double av_evaluate_lls(LLSModel *m, double *param, int order)
-{
-    return m->evaluate_lls(m, param, order);
-}
-#endif /* FF_API_LLS_PRIVATE */
-
-#ifdef TEST
-
-#include <stdio.h>
-#include <limits.h>
-#include "lfg.h"
-
-int main(void)
-{
-    LLSModel m;
-    int i, order;
-    AVLFG lfg;
-
-    av_lfg_init(&lfg, 1);
-    avpriv_init_lls(&m, 3);
-
-    for (i = 0; i < 100; i++) {
-        LOCAL_ALIGNED(32, double, var, [4]);
-        double eval;
-
-        var[0] = (av_lfg_get(&lfg) / (double) UINT_MAX - 0.5) * 2;
-        var[1] = var[0] + av_lfg_get(&lfg) / (double) UINT_MAX - 0.5;
-        var[2] = var[1] + av_lfg_get(&lfg) / (double) UINT_MAX - 0.5;
-        var[3] = var[2] + av_lfg_get(&lfg) / (double) UINT_MAX - 0.5;
-        m.update_lls(&m, var);
-        avpriv_solve_lls(&m, 0.001, 0);
-        for (order = 0; order < 3; order++) {
-            eval = m.evaluate_lls(&m, var + 1, order);
-            printf("real:%9f order:%d pred:%9f var:%f coeffs:%f %9f %9f\n",
-                   var[0], order, eval, sqrt(m.variance[order] / (i + 1)),
-                   m.coeff[order][0], m.coeff[order][1],
-                   m.coeff[order][2]);
-        }
-    }
-    return 0;
-}
-
-#endif
diff --git a/libavutil/lls.h b/libavutil/lls.h
deleted file mode 100644
index c62d78a..0000000
--- a/libavutil/lls.h
+++ /dev/null
@@ -1,71 +0,0 @@
-/*
- * linear least squares model
- *
- * Copyright (c) 2006 Michael Niedermayer <michaelni at gmx.at>
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg 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 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg 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 FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#ifndef AVUTIL_LLS_H
-#define AVUTIL_LLS_H
-
-#include "common.h"
-#include "mem.h"
-#include "version.h"
-
-#define MAX_VARS 32
-#define MAX_VARS_ALIGN FFALIGN(MAX_VARS+1,4)
-
-//FIXME avoid direct access to LLSModel from outside
-
-/**
- * Linear least squares model.
- */
-typedef struct LLSModel {
-    DECLARE_ALIGNED(32, double, covariance[MAX_VARS_ALIGN][MAX_VARS_ALIGN]);
-    DECLARE_ALIGNED(32, double, coeff[MAX_VARS][MAX_VARS]);
-    double variance[MAX_VARS];
-    int indep_count;
-    /**
-     * Take the outer-product of var[] with itself, and add to the covariance matrix.
-     * @param m this context
-     * @param var training samples, starting with the value to be predicted
-     *            32-byte aligned, and any padding elements must be initialized
-     *            (i.e not denormal/nan).
-     */
-    void (*update_lls)(struct LLSModel *m, double *var);
-    /**
-     * Inner product of var[] and the LPC coefs.
-     * @param m this context
-     * @param var training samples, excluding the value to be predicted. unaligned.
-     * @param order lpc order
-     */
-    double (*evaluate_lls)(struct LLSModel *m, double *var, int order);
-} LLSModel;
-
-void avpriv_init_lls(LLSModel *m, int indep_count);
-void ff_init_lls_x86(LLSModel *m);
-void avpriv_solve_lls(LLSModel *m, double threshold, unsigned short min_order);
-
-#if FF_API_LLS_PRIVATE
-void av_init_lls(LLSModel *m, int indep_count);
-void av_update_lls(LLSModel *m, double *param, double decay);
-void av_solve_lls(LLSModel *m, double threshold, int min_order);
-double av_evaluate_lls(LLSModel *m, double *param, int order);
-#endif /* FF_API_LLS_PRIVATE */
-
-#endif /* AVUTIL_LLS_H */
diff --git a/libavutil/lls2.c b/libavutil/lls2.c
new file mode 100644
index 0000000..f381ebc
--- /dev/null
+++ b/libavutil/lls2.c
@@ -0,0 +1,179 @@
+/*
+ * linear least squares model
+ *
+ * Copyright (c) 2006 Michael Niedermayer <michaelni at gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * linear least squares model
+ */
+
+#include <math.h>
+#include <string.h>
+
+#include "attributes.h"
+#include "version.h"
+#include "lls2.h"
+
+static void update_lls(LLSModel *m, double *var)
+{
+    int i, j;
+
+    for (i = 0; i <= m->indep_count; i++) {
+        for (j = i; j <= m->indep_count; j++) {
+            m->covariance[i][j] += var[i] * var[j];
+        }
+    }
+}
+
+void avpriv_solve_lls(LLSModel *m, double threshold, unsigned short min_order)
+{
+    int i, j, k;
+    double (*factor)[MAX_VARS_ALIGN] = (void *) &m->covariance[1][0];
+    double (*covar) [MAX_VARS_ALIGN] = (void *) &m->covariance[1][1];
+    double *covar_y                = m->covariance[0];
+    int count                      = m->indep_count;
+
+    for (i = 0; i < count; i++) {
+        for (j = i; j < count; j++) {
+            double sum = covar[i][j];
+
+            for (k = i - 1; k >= 0; k--)
+                sum -= factor[i][k] * factor[j][k];
+
+            if (i == j) {
+                if (sum < threshold)
+                    sum = 1.0;
+                factor[i][i] = sqrt(sum);
+            } else {
+                factor[j][i] = sum / factor[i][i];
+            }
+        }
+    }
+
+    for (i = 0; i < count; i++) {
+        double sum = covar_y[i + 1];
+
+        for (k = i - 1; k >= 0; k--)
+            sum -= factor[i][k] * m->coeff[0][k];
+
+        m->coeff[0][i] = sum / factor[i][i];
+    }
+
+    for (j = count - 1; j >= min_order; j--) {
+        for (i = j; i >= 0; i--) {
+            double sum = m->coeff[0][i];
+
+            for (k = i + 1; k <= j; k++)
+                sum -= factor[k][i] * m->coeff[j][k];
+
+            m->coeff[j][i] = sum / factor[i][i];
+        }
+
+        m->variance[j] = covar_y[0];
+
+        for (i = 0; i <= j; i++) {
+            double sum = m->coeff[j][i] * covar[i][i] - 2 * covar_y[i + 1];
+
+            for (k = 0; k < i; k++)
+                sum += 2 * m->coeff[j][k] * covar[k][i];
+
+            m->variance[j] += m->coeff[j][i] * sum;
+        }
+    }
+}
+
+static double evaluate_lls(LLSModel *m, double *param, int order)
+{
+    int i;
+    double out = 0;
+
+    for (i = 0; i <= order; i++)
+        out += param[i] * m->coeff[order][i];
+
+    return out;
+}
+
+av_cold void avpriv_init_lls(LLSModel *m, int indep_count)
+{
+    memset(m, 0, sizeof(LLSModel));
+    m->indep_count = indep_count;
+    m->update_lls = update_lls;
+    m->evaluate_lls = evaluate_lls;
+    if (ARCH_X86)
+        ff_init_lls_x86(m);
+}
+
+#if FF_API_LLS_PRIVATE
+av_cold void av_init_lls(LLSModel *m, int indep_count)
+{
+    avpriv_init_lls(m, indep_count);
+}
+void av_update_lls(LLSModel *m, double *param, double decay)
+{
+    m->update_lls(m, param);
+}
+void av_solve_lls(LLSModel *m, double threshold, int min_order)
+{
+    avpriv_solve_lls(m, threshold, min_order);
+}
+double av_evaluate_lls(LLSModel *m, double *param, int order)
+{
+    return m->evaluate_lls(m, param, order);
+}
+#endif /* FF_API_LLS_PRIVATE */
+
+#ifdef TEST
+
+#include <stdio.h>
+#include <limits.h>
+#include "lfg.h"
+
+int main(void)
+{
+    LLSModel m;
+    int i, order;
+    AVLFG lfg;
+
+    av_lfg_init(&lfg, 1);
+    avpriv_init_lls(&m, 3);
+
+    for (i = 0; i < 100; i++) {
+        LOCAL_ALIGNED(32, double, var, [4]);
+        double eval;
+
+        var[0] = (av_lfg_get(&lfg) / (double) UINT_MAX - 0.5) * 2;
+        var[1] = var[0] + av_lfg_get(&lfg) / (double) UINT_MAX - 0.5;
+        var[2] = var[1] + av_lfg_get(&lfg) / (double) UINT_MAX - 0.5;
+        var[3] = var[2] + av_lfg_get(&lfg) / (double) UINT_MAX - 0.5;
+        m.update_lls(&m, var);
+        avpriv_solve_lls(&m, 0.001, 0);
+        for (order = 0; order < 3; order++) {
+            eval = m.evaluate_lls(&m, var + 1, order);
+            printf("real:%9f order:%d pred:%9f var:%f coeffs:%f %9f %9f\n",
+                   var[0], order, eval, sqrt(m.variance[order] / (i + 1)),
+                   m.coeff[order][0], m.coeff[order][1],
+                   m.coeff[order][2]);
+        }
+    }
+    return 0;
+}
+
+#endif
diff --git a/libavutil/lls2.h b/libavutil/lls2.h
new file mode 100644
index 0000000..c62d78a
--- /dev/null
+++ b/libavutil/lls2.h
@@ -0,0 +1,71 @@
+/*
+ * linear least squares model
+ *
+ * Copyright (c) 2006 Michael Niedermayer <michaelni at gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_LLS_H
+#define AVUTIL_LLS_H
+
+#include "common.h"
+#include "mem.h"
+#include "version.h"
+
+#define MAX_VARS 32
+#define MAX_VARS_ALIGN FFALIGN(MAX_VARS+1,4)
+
+//FIXME avoid direct access to LLSModel from outside
+
+/**
+ * Linear least squares model.
+ */
+typedef struct LLSModel {
+    DECLARE_ALIGNED(32, double, covariance[MAX_VARS_ALIGN][MAX_VARS_ALIGN]);
+    DECLARE_ALIGNED(32, double, coeff[MAX_VARS][MAX_VARS]);
+    double variance[MAX_VARS];
+    int indep_count;
+    /**
+     * Take the outer-product of var[] with itself, and add to the covariance matrix.
+     * @param m this context
+     * @param var training samples, starting with the value to be predicted
+     *            32-byte aligned, and any padding elements must be initialized
+     *            (i.e not denormal/nan).
+     */
+    void (*update_lls)(struct LLSModel *m, double *var);
+    /**
+     * Inner product of var[] and the LPC coefs.
+     * @param m this context
+     * @param var training samples, excluding the value to be predicted. unaligned.
+     * @param order lpc order
+     */
+    double (*evaluate_lls)(struct LLSModel *m, double *var, int order);
+} LLSModel;
+
+void avpriv_init_lls(LLSModel *m, int indep_count);
+void ff_init_lls_x86(LLSModel *m);
+void avpriv_solve_lls(LLSModel *m, double threshold, unsigned short min_order);
+
+#if FF_API_LLS_PRIVATE
+void av_init_lls(LLSModel *m, int indep_count);
+void av_update_lls(LLSModel *m, double *param, double decay);
+void av_solve_lls(LLSModel *m, double threshold, int min_order);
+double av_evaluate_lls(LLSModel *m, double *param, int order);
+#endif /* FF_API_LLS_PRIVATE */
+
+#endif /* AVUTIL_LLS_H */
diff --git a/libavutil/x86/lls_init.c b/libavutil/x86/lls_init.c
index 181ca38..b2424b3 100644
--- a/libavutil/x86/lls_init.c
+++ b/libavutil/x86/lls_init.c
@@ -20,7 +20,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#include "libavutil/lls.h"
+#include "libavutil/lls2.h"
 #include "libavutil/x86/cpu.h"
 
 void ff_update_lls_sse2(LLSModel *m, double *var);
-- 
1.7.9.5



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