20 files changed, 85 insertions, 50 deletions
diff --git a/libavcodec/aacenc_utils.h b/libavcodec/aacenc_utils.h
index 07f7337..bb1dcb4 100644
--- a/libavcodec/aacenc_utils.h
+++ b/libavcodec/aacenc_utils.h
@@ -28,7 +28,7 @@
 #ifndef AVCODEC_AACENC_UTILS_H
 #define AVCODEC_AACENC_UTILS_H
 
-#include "libavutil/internal.h"
+#include "libavutil/ffmath.h"
 #include "aac.h"
 #include "aacenctab.h"
 #include "aactab.h"
diff --git a/libavcodec/aacpsy.c b/libavcodec/aacpsy.c
index 8643fe7..0898baf 100644
--- a/libavcodec/aacpsy.c
+++ b/libavcodec/aacpsy.c
@@ -25,8 +25,7 @@
  */
 
 #include "libavutil/attributes.h"
-#include "libavutil/internal.h"
-#include "libavutil/libm.h"
+#include "libavutil/ffmath.h"
 
 #include "avcodec.h"
 #include "aactab.h"
diff --git a/libavcodec/acelp_pitch_delay.c b/libavcodec/acelp_pitch_delay.c
index c2533b1..8ec1ba3 100644
--- a/libavcodec/acelp_pitch_delay.c
+++ b/libavcodec/acelp_pitch_delay.c
@@ -21,9 +21,8 @@
  */
 
 #include "libavutil/common.h"
+#include "libavutil/ffmath.h"
 #include "libavutil/float_dsp.h"
-#include "libavutil/internal.h"
-#include "libavutil/libm.h"
 #include "libavutil/mathematics.h"
 #include "avcodec.h"
 #include "acelp_pitch_delay.h"
diff --git a/libavcodec/cngdec.c b/libavcodec/cngdec.c
index 0251086..34f8814 100644
--- a/libavcodec/cngdec.c
+++ b/libavcodec/cngdec.c
@@ -22,7 +22,7 @@
 #include <math.h>
 
 #include "libavutil/common.h"
-#include "libavutil/internal.h"
+#include "libavutil/ffmath.h"
 #include "avcodec.h"
 #include "celp_filters.h"
 #include "internal.h"
diff --git a/libavcodec/dcaenc.c b/libavcodec/dcaenc.c
index 70e9230..ab40e37 100644
--- a/libavcodec/dcaenc.c
+++ b/libavcodec/dcaenc.c
@@ -24,7 +24,7 @@
 #include "libavutil/avassert.h"
 #include "libavutil/channel_layout.h"
 #include "libavutil/common.h"
-#include "libavutil/internal.h"
+#include "libavutil/ffmath.h"
 #include "avcodec.h"
 #include "dca.h"
 #include "dcadata.h"
diff --git a/libavcodec/imc.c b/libavcodec/imc.c
index 085ec09..850bc9d 100644
--- a/libavcodec/imc.c
+++ b/libavcodec/imc.c
@@ -35,9 +35,9 @@
 #include <stdio.h>
 
 #include "libavutil/channel_layout.h"
+#include "libavutil/ffmath.h"
 #include "libavutil/float_dsp.h"
 #include "libavutil/internal.h"
-#include "libavutil/libm.h"
 #include "avcodec.h"
 #include "bswapdsp.h"
 #include "get_bits.h"
diff --git a/libavcodec/on2avc.c b/libavcodec/on2avc.c
index 62c71cc..3064c6f 100644
--- a/libavcodec/on2avc.c
+++ b/libavcodec/on2avc.c
@@ -21,8 +21,8 @@
  */
 
 #include "libavutil/channel_layout.h"
+#include "libavutil/ffmath.h"
 #include "libavutil/float_dsp.h"
-#include "libavutil/internal.h"
 #include "avcodec.h"
 #include "bytestream.h"
 #include "fft.h"
diff --git a/libavcodec/opus.c b/libavcodec/opus.c
index f2b8ecc..47f2657 100644
--- a/libavcodec/opus.c
+++ b/libavcodec/opus.c
@@ -27,7 +27,7 @@
 #include <stdint.h>
 
 #include "libavutil/error.h"
-#include "libavutil/internal.h"
+#include "libavutil/ffmath.h"
 
 #include "opus.h"
 #include "vorbis.h"
diff --git a/libavcodec/wmadec.c b/libavcodec/wmadec.c
index 1a84323..7130bf6 100644
--- a/libavcodec/wmadec.c
+++ b/libavcodec/wmadec.c
@@ -34,8 +34,7 @@
  */
 
 #include "libavutil/attributes.h"
-#include "libavutil/internal.h"
-#include "libavutil/libm.h"
+#include "libavutil/ffmath.h"
 
 #include "avcodec.h"
 #include "internal.h"
diff --git a/libavcodec/wmaenc.c b/libavcodec/wmaenc.c
index d0727e6..418e958 100644
--- a/libavcodec/wmaenc.c
+++ b/libavcodec/wmaenc.c
@@ -20,7 +20,7 @@
  */
 
 #include "libavutil/attributes.h"
-#include "libavutil/internal.h"
+#include "libavutil/ffmath.h"
 
 #include "avcodec.h"
 #include "internal.h"
diff --git a/libavcodec/wmaprodec.c b/libavcodec/wmaprodec.c
index 2ea59e9..2cc1b09 100644
--- a/libavcodec/wmaprodec.c
+++ b/libavcodec/wmaprodec.c
@@ -88,8 +88,8 @@
 
 #include <inttypes.h>
 
+#include "libavutil/ffmath.h"
 #include "libavutil/float_dsp.h"
-#include "libavutil/internal.h"
 #include "libavutil/intfloat.h"
 #include "libavutil/intreadwrite.h"
 #include "avcodec.h"
diff --git a/libavfilter/af_anequalizer.c b/libavfilter/af_anequalizer.c
index a344c77..2403460 100644
--- a/libavfilter/af_anequalizer.c
+++ b/libavfilter/af_anequalizer.c
@@ -21,6 +21,7 @@
 
 #include "libavutil/intreadwrite.h"
 #include "libavutil/avstring.h"
+#include "libavutil/ffmath.h"
 #include "libavutil/opt.h"
 #include "libavutil/parseutils.h"
 #include "avfilter.h"
diff --git a/libavfilter/af_compand.c b/libavfilter/af_compand.c
index b746364..0bb719f 100644
--- a/libavfilter/af_compand.c
+++ b/libavfilter/af_compand.c
@@ -29,6 +29,7 @@
 
 #include "libavutil/avassert.h"
 #include "libavutil/avstring.h"
+#include "libavutil/ffmath.h"
 #include "libavutil/opt.h"
 #include "libavutil/samplefmt.h"
 #include "audio.h"
diff --git a/libavfilter/af_volume.c b/libavfilter/af_volume.c
index 3913e7b..4d6b916 100644
--- a/libavfilter/af_volume.c
+++ b/libavfilter/af_volume.c
@@ -27,6 +27,7 @@
 #include "libavutil/channel_layout.h"
 #include "libavutil/common.h"
 #include "libavutil/eval.h"
+#include "libavutil/ffmath.h"
 #include "libavutil/float_dsp.h"
 #include "libavutil/intreadwrite.h"
 #include "libavutil/opt.h"
diff --git a/libavfilter/f_ebur128.c b/libavfilter/f_ebur128.c
index c4b30b4..59eaedd 100644
--- a/libavfilter/f_ebur128.c
+++ b/libavfilter/f_ebur128.c
@@ -33,6 +33,7 @@
 #include "libavutil/avstring.h"
 #include "libavutil/channel_layout.h"
 #include "libavutil/dict.h"
+#include "libavutil/ffmath.h"
 #include "libavutil/xga_font_data.h"
 #include "libavutil/opt.h"
 #include "libavutil/timestamp.h"
diff --git a/libavfilter/vaf_spectrumsynth.c b/libavfilter/vaf_spectrumsynth.c
index 8d4014e..ee394b4 100644
--- a/libavfilter/vaf_spectrumsynth.c
+++ b/libavfilter/vaf_spectrumsynth.c
@@ -27,6 +27,7 @@
 #include "libavcodec/avfft.h"
 #include "libavutil/avassert.h"
 #include "libavutil/channel_layout.h"
+#include "libavutil/ffmath.h"
 #include "libavutil/opt.h"
 #include "libavutil/parseutils.h"
 #include "avfilter.h"
diff --git a/libavfilter/vsrc_testsrc.c b/libavfilter/vsrc_testsrc.c
index a75dd4c..f0c0985 100644
--- a/libavfilter/vsrc_testsrc.c
+++ b/libavfilter/vsrc_testsrc.c
@@ -37,6 +37,7 @@
 
 #include "libavutil/avassert.h"
 #include "libavutil/common.h"
+#include "libavutil/ffmath.h"
 #include "libavutil/opt.h"
 #include "libavutil/imgutils.h"
 #include "libavutil/intreadwrite.h"
diff --git a/libavutil/eval.c b/libavutil/eval.c
index 2acbbb4..37b8511 100644
--- a/libavutil/eval.c
+++ b/libavutil/eval.c
@@ -31,6 +31,7 @@
 #include "avutil.h"
 #include "common.h"
 #include "eval.h"
+#include "ffmath.h"
 #include "internal.h"
 #include "log.h"
 #include "mathematics.h"
diff --git a/libavutil/ffmath.h b/libavutil/ffmath.h
new file mode 100644
index 0000000..aad1347
--- /dev/null
+++ b/libavutil/ffmath.h
@@ -0,0 +1,67 @@
+/*
+ * copyright (c) 2016 Ganesh Ajjanagadde <gajjanag@gmail.com>
+ *
+ * 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
+ * internal math functions header
+ */
+
+#ifndef AVUTIL_FFMATH_H
+#define AVUTIL_FFMATH_H
+
+#include "attributes.h"
+#include "libm.h"
+
+/**
+ * Compute 10^x for floating point values. Note: this function is by no means
+ * "correctly rounded", and is meant as a fast, reasonably accurate approximation.
+ * For instance, maximum relative error for the double precision variant is
+ * ~ 1e-13 for very small and very large values.
+ * This is ~2x faster than GNU libm's approach, which is still off by 2ulp on
+ * some inputs.
+ * @param x exponent
+ * @return 10^x
+ */
+static av_always_inline double ff_exp10(double x)
+{
+    return exp2(M_LOG2_10 * x);
+}
+
+static av_always_inline float ff_exp10f(float x)
+{
+    return exp2f(M_LOG2_10 * x);
+}
+
+/**
+ * Compute x^y for floating point x, y. Note: this function is faster than the
+ * libm variant due to mainly 2 reasons:
+ * 1. It does not handle any edge cases. In particular, this is only guaranteed
+ * to work correctly for x > 0.
+ * 2. It is not as accurate as a standard nearly "correctly rounded" libm variant.
+ * @param x base
+ * @param y exponent
+ * @return x^y
+ */
+static av_always_inline float ff_fast_powf(float x, float y)
+{
+    return expf(logf(x) * y);
+}
+
+#endif /* AVUTIL_FFMATH_H */
diff --git a/libavutil/internal.h b/libavutil/internal.h
index 340e18b..61784b5 100644
--- a/libavutil/internal.h
+++ b/libavutil/internal.h
@@ -295,42 +295,6 @@ static av_always_inline av_const int64_t ff_rint64_clip(double a, int64_t amin,
 }
 
 /**
- * Compute 10^x for floating point values. Note: this function is by no means
- * "correctly rounded", and is meant as a fast, reasonably accurate approximation.
- * For instance, maximum relative error for the double precision variant is
- * ~ 1e-13 for very small and very large values.
- * This is ~2x faster than GNU libm's approach, which is still off by 2ulp on
- * some inputs.
- * @param x exponent
- * @return 10^x
- */
-static av_always_inline double ff_exp10(double x)
-{
-    return exp2(M_LOG2_10 * x);
-}
-
-static av_always_inline float ff_exp10f(float x)
-{
-    return exp2f(M_LOG2_10 * x);
-}
-
-/**
- * Compute x^y for floating point x, y. Note: this function is faster than the
- * libm variant due to mainly 2 reasons:
- * 1. It does not handle any edge cases. In particular, this is only guaranteed
- * to work correctly for x > 0.
- * 2. It is not as accurate as a standard nearly "correctly rounded" libm variant.
- * @param x base
- * @param y exponent
- * @return x^y
- */
-static av_always_inline float ff_fast_powf(float x, float y)
-{
-    return expf(logf(x) * y);
-}
-
-
-/**
  * A wrapper for open() setting O_CLOEXEC.
  */
 av_warn_unused_result