diff --git a/configure b/configure
index 096ba3b28b..2c6eeead58 100755
--- a/configure
+++ b/configure
@@ -102,7 +102,6 @@ show_help(){
   echo "  --enable-amr-nb          enable amr-nb floating point audio codec"
   echo "  --enable-amr-nb-fixed    enable amr-nb fixed-point codec"
   echo "  --enable-amr-wb          enable amr-wb floating point audio codec"
-  echo "  --enable-amr-if2         enable amr-wb IF2 audio codec"
   echo ""
   echo "Advanced options (experts only):"
   echo "  --source-path=PATH       path to source code [$source_path]"
@@ -640,7 +639,6 @@ CMDLINE_SELECT="
     $CONFIG_LIST
     $TARGET_LIST
     $THREADS_LIST
-    amr_if2
     debug
     extra_warnings
     shared
@@ -765,7 +763,6 @@ v4l2="yes"
 v4l="yes"
 
 # libraries
-amr_if2="no"
 amr_nb="no"
 amr_nb_fixed="no"
 amr_wb="no"
@@ -1587,11 +1584,13 @@ for thread in $THREADS_LIST; do
     fi
 done
 
-enabled_any amr_nb amr_nb_fixed amr_wb amr_if2 && enable amr
+enabled_any amr_nb amr_nb_fixed amr_wb && enable amr
 enabled_all amr_nb amr_nb_fixed &&
     die "Only one of amr_nb and amr_nb_fixed may be enabled."
 
 # these are off by default, so fail if requested and not available
+enabled amr_nb     && require libamrnb amrnb/interf_dec.h Speech_Decode_Frame_init -lamrnb -lm
+enabled amr_wb     && require libamrwb amrwb/dec_if.h D_IF_init -lamrwb -lm
 enabled liba52     && require liba52 a52dec/a52.h a52_init -la52
 enabled libdts     && require libdts dts.h dts_init -ldts -lm
 enabled libgsm     && require libgsm gsm.h gsm_create -lgsm
@@ -1868,7 +1867,6 @@ echo "zlib enabled              $zlib"
 echo "AMR-NB float support      $amr_nb"
 echo "AMR-NB fixed support      $amr_nb_fixed"
 echo "AMR-WB float support      $amr_wb"
-echo "AMR-WB IF2 support        $amr_if2"
 if disabled gpl; then
     echo "License: LGPL"
 else
@@ -2006,10 +2004,6 @@ echo "SRC_PATH=\"$source_path\"" >> config.mak
 echo "SRC_PATH_BARE=$source_path" >> config.mak
 echo "BUILD_ROOT=\"$PWD\"" >> config.mak
 
-if enabled amr_if2; then
-  echo "AMR_CFLAGS=-DIF2=1" >> config.mak
-fi
-
 # Apparently it's not possible to portably echo a backslash.
 if enabled asmalign_pot; then
   printf '#define ASMALIGN(ZEROBITS) ".align " #ZEROBITS "\\n\\t"\n' >> $TMPH
@@ -2054,8 +2048,6 @@ if enabled source_path_used; then
          libavcodec/mlib \
          libavcodec/ppc \
          libavcodec/amr \
-         libavcodec/amr_float \
-         libavcodec/amrwb_float \
          libpostproc \
          libavutil \
          libswscale \
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index f1a168557b..9292c85b3f 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -4,7 +4,7 @@
 #
 include ../config.mak
 
-CFLAGS+=-I$(SRC_PATH)/libswscale $(AMR_CFLAGS)
+CFLAGS+=-I$(SRC_PATH)/libswscale
 
 OBJS= bitstream.o \
       utils.o \
@@ -270,33 +270,11 @@ OBJS-$(CONFIG_X264)                    += x264.o
 OBJS-$(CONFIG_XVID)                    += xvidff.o xvid_rc.o
 
 OBJS-$(CONFIG_AMR)                     += amr.o
-OBJS-$(CONFIG_AMR_NB)                  += amr_float/sp_dec.o     \
-                                          amr_float/sp_enc.o     \
-                                          amr_float/interf_dec.o \
-                                          amr_float/interf_enc.o
-
 ifeq ($(CONFIG_AMR_NB_FIXED),yes)
 EXTRAOBJS += amr/*.o
 EXTRADEPS=amrlibs
 endif
 
-OBJS-$(CONFIG_AMR_WB)                  += amrwb_float/dec_acelp.o \
-                                          amrwb_float/dec_dtx.o   \
-                                          amrwb_float/dec_gain.o  \
-                                          amrwb_float/dec_if.o    \
-                                          amrwb_float/dec_lpc.o   \
-                                          amrwb_float/dec_main.o  \
-                                          amrwb_float/dec_rom.o   \
-                                          amrwb_float/dec_util.o  \
-                                          amrwb_float/enc_acelp.o \
-                                          amrwb_float/enc_dtx.o   \
-                                          amrwb_float/enc_gain.o  \
-                                          amrwb_float/enc_if.o    \
-                                          amrwb_float/enc_lpc.o   \
-                                          amrwb_float/enc_main.o  \
-                                          amrwb_float/enc_rom.o   \
-                                          amrwb_float/enc_util.o  \
-                                          amrwb_float/if_rom.o
 
 OBJS-$(CONFIG_AAC_PARSER)              += parser.o
 OBJS-$(CONFIG_AC3_PARSER)              += parser.o ac3.o
@@ -433,10 +411,8 @@ clean::
 	   ps2/*.o ps2/*~ \
 	   sh4/*.o sh4/*~ \
 	   sparc/*.o sparc/*~ \
-	   amr_float/*.o \
 	   apiexample $(TESTS)
 	-$(MAKE) -C amr clean
-	-$(MAKE) -C amrwb_float -f makefile.gcc clean
 
 apiexample: apiexample.o $(LIB)
 
diff --git a/libavcodec/amr.c b/libavcodec/amr.c
index 0a462542de..3ded25edd9 100644
--- a/libavcodec/amr.c
+++ b/libavcodec/amr.c
@@ -82,8 +82,8 @@
 #include "amr/e_homing.h"
 
 #else
-#include "amr_float/interf_dec.h"
-#include "amr_float/interf_enc.h"
+#include <amrnb/interf_dec.h>
+#include <amrnb/interf_enc.h>
 #endif
 
 static const char *nb_bitrate_unsupported =
@@ -532,8 +532,9 @@ AVCodec amr_nb_encoder =
 #define typedef_h
 #endif
 
-#include "amrwb_float/enc_if.h"
-#include "amrwb_float/dec_if.h"
+#include <amrwb/enc_if.h>
+#include <amrwb/dec_if.h>
+#include <amrwb/if_rom.h>
 
 /* Common code for fixed and float version*/
 typedef struct AMRWB_bitrates
@@ -652,8 +653,6 @@ static int amr_wb_decode_init(AVCodecContext * avctx)
     return 0;
 }
 
-extern const UWord8 block_size[];
-
 static int amr_wb_decode_frame(AVCodecContext * avctx,
             void *data, int *data_size,
             uint8_t * buf, int buf_size)