diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index aaf9ceb4f97327bfae392c4e9ebf2d62b4c7ea00..fa70216c9c176a56886a11bb32958f2014aeeafc 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -27,7 +27,7 @@ OBJS = allcodecs.o                                                      \
 OBJS-$(CONFIG_AANDCT)                  += aandcttab.o
 OBJS-$(CONFIG_AC3DSP)                  += ac3dsp.o
 OBJS-$(CONFIG_ENCODERS)                += faandct.o jfdctfst.o jfdctint.o
-OBJS-$(CONFIG_DCT)                     += dct.o
+OBJS-$(CONFIG_DCT)                     += dct.o dct32_fixed.o dct32_float.o
 OBJS-$(CONFIG_DWT)                     += dwt.o
 OBJS-$(CONFIG_DXVA2)                   += dxva2.o
 FFT-OBJS-$(CONFIG_HARDCODED_TABLES)    += cos_tables.o cos_fixed_tables.o
diff --git a/libavcodec/dct.c b/libavcodec/dct.c
index caa6bdb4b4b407e3b1003519e5926b4bdd6144c8..5c63af30a1a536347ab1f4f81711645441ce9bd9 100644
--- a/libavcodec/dct.c
+++ b/libavcodec/dct.c
@@ -30,9 +30,7 @@
 #include <math.h>
 #include "libavutil/mathematics.h"
 #include "dct.h"
-
-#define DCT32_FLOAT
-#include "dct32.c"
+#include "dct32.h"
 
 /* sin((M_PI * x / (2*n)) */
 #define SIN(s,n,x) (s->costab[(n) - (x)])
@@ -210,7 +208,7 @@ av_cold int ff_dct_init(DCTContext *s, int nbits, enum DCTTransformType inverse)
         }
     }
 
-    s->dct32 = dct32;
+    s->dct32 = ff_dct32_float;
     if (HAVE_MMX)     ff_dct_init_mmx(s);
 
     return 0;
diff --git a/libavcodec/dct32.c b/libavcodec/dct32.c
index ae99d889965d79126b9a03204c10d706675d99f8..272e0dbf955bd9e0bca40f07ad1b35eebd8b4bf0 100644
--- a/libavcodec/dct32.c
+++ b/libavcodec/dct32.c
@@ -19,10 +19,19 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#ifdef DCT32_FLOAT
+#include "dct32.h"
+#include "mathops.h"
+
+#if DCT32_FLOAT
+#   define dct32 ff_dct32_float
 #   define FIXHR(x)       ((float)(x))
 #   define MULH3(x, y, s) ((s)*(y)*(x))
 #   define INTFLOAT float
+#else
+#   define dct32 ff_dct32_fixed
+#   define FIXHR(a)       ((int)((a) * (1LL<<32) + 0.5))
+#   define MULH3(x, y, s) MULH((s)*(x), y)
+#   define INTFLOAT int
 #endif
 
 
@@ -103,7 +112,7 @@
 #define ADD(a, b) val##a += val##b
 
 /* DCT32 without 1/sqrt(2) coef zero scaling. */
-static void dct32(INTFLOAT *out, const INTFLOAT *tab)
+void dct32(INTFLOAT *out, const INTFLOAT *tab)
 {
     INTFLOAT tmp0, tmp1;
 
diff --git a/libavcodec/dct32.h b/libavcodec/dct32.h
new file mode 100644
index 0000000000000000000000000000000000000000..110338d25c5e4295fd61e760f76efb3aa52fea7b
--- /dev/null
+++ b/libavcodec/dct32.h
@@ -0,0 +1,25 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_DCT32_H
+#define AVCODEC_DCT32_H
+
+void ff_dct32_float(float *dst, const float *src);
+void ff_dct32_fixed(int *dst, const int *src);
+
+#endif
diff --git a/libavcodec/dct32_fixed.c b/libavcodec/dct32_fixed.c
new file mode 100644
index 0000000000000000000000000000000000000000..7eb9dc1a532cf134e181f1bc4afc579dfafb31ea
--- /dev/null
+++ b/libavcodec/dct32_fixed.c
@@ -0,0 +1,20 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#define DCT32_FLOAT 0
+#include "dct32.c"
diff --git a/libavcodec/dct32_float.c b/libavcodec/dct32_float.c
new file mode 100644
index 0000000000000000000000000000000000000000..727ec3caca1c9ba07430420d7599378b889380da
--- /dev/null
+++ b/libavcodec/dct32_float.c
@@ -0,0 +1,20 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#define DCT32_FLOAT 1
+#include "dct32.c"
diff --git a/libavcodec/mpegaudiodec.c b/libavcodec/mpegaudiodec.c
index 8c42e09666750c69cd6ac4d0a735293dab82363c..35e217ea3e111218379e464be595b555de6e6275 100644
--- a/libavcodec/mpegaudiodec.c
+++ b/libavcodec/mpegaudiodec.c
@@ -29,6 +29,7 @@
 #include "get_bits.h"
 #include "dsputil.h"
 #include "mathops.h"
+#include "dct32.h"
 
 /*
  * TODO:
@@ -68,12 +69,6 @@
 #include "mpegaudiodata.h"
 #include "mpegaudiodectab.h"
 
-#if CONFIG_FLOAT
-#    include "fft.h"
-#else
-#    include "dct32.c"
-#endif
-
 static void compute_antialias(MPADecodeContext *s, GranuleDef *g);
 static void apply_window_mp3_c(MPA_INT *synth_buf, MPA_INT *window,
                                int *dither_state, OUT_INT *samples, int incr);
@@ -637,7 +632,7 @@ void ff_mpa_synth_filter(MPA_INT *synth_buf_ptr, int *synth_buf_offset,
     offset = *synth_buf_offset;
     synth_buf = synth_buf_ptr + offset;
 
-    dct32(synth_buf, sb_samples);
+    ff_dct32_fixed(synth_buf, sb_samples);
     apply_window_mp3_c(synth_buf, window, dither_state, samples, incr);
 
     offset = (offset - 32) & 511;