diff --git a/libavcodec/binkaudio.c b/libavcodec/binkaudio.c
index 1dceeb74c3..adffc6b2b6 100644
--- a/libavcodec/binkaudio.c
+++ b/libavcodec/binkaudio.c
@@ -35,7 +35,7 @@
 #include "dct.h"
 #include "rdft.h"
 #include "fmtconvert.h"
-#include "libavutil/intfloat_readwrite.h"
+#include "libavutil/intfloat.h"
 
 extern const uint16_t ff_wma_critical_freqs[25];
 
@@ -193,8 +193,8 @@ static int decode_block(BinkAudioContext *s, int16_t *out, int use_dct)
         if (s->version_b) {
             if (get_bits_left(gb) < 64)
                 return AVERROR_INVALIDDATA;
-            coeffs[0] = av_int2flt(get_bits(gb, 32)) * s->root;
-            coeffs[1] = av_int2flt(get_bits(gb, 32)) * s->root;
+            coeffs[0] = av_int2float(get_bits_long(gb, 32)) * s->root;
+            coeffs[1] = av_int2float(get_bits_long(gb, 32)) * s->root;
         } else {
             if (get_bits_left(gb) < 58)
                 return AVERROR_INVALIDDATA;
diff --git a/libavformat/4xm.c b/libavformat/4xm.c
index 6dc919e1bf..ccbe3add3f 100644
--- a/libavformat/4xm.c
+++ b/libavformat/4xm.c
@@ -28,7 +28,7 @@
  */
 
 #include "libavutil/intreadwrite.h"
-#include "libavutil/intfloat_readwrite.h"
+#include "libavutil/intfloat.h"
 #include "avformat.h"
 #include "internal.h"
 
@@ -131,7 +131,7 @@ static int fourxm_read_header(AVFormatContext *s,
         size = AV_RL32(&header[i + 4]);
 
         if (fourcc_tag == std__TAG) {
-            fourxm->fps = av_int2flt(AV_RL32(&header[i + 12]));
+            fourxm->fps = av_int2float(AV_RL32(&header[i + 12]));
         } else if (fourcc_tag == vtrk_TAG) {
             /* check that there is enough data */
             if (size != vtrk_SIZE) {
diff --git a/libavformat/aiffdec.c b/libavformat/aiffdec.c
index f54a7ffafe..0e69d02c8c 100644
--- a/libavformat/aiffdec.c
+++ b/libavformat/aiffdec.c
@@ -19,7 +19,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#include "libavutil/intfloat_readwrite.h"
+#include "libavutil/mathematics.h"
 #include "libavutil/dict.h"
 #include "avformat.h"
 #include "internal.h"
@@ -88,7 +88,8 @@ static void get_meta(AVFormatContext *s, const char *key, int size)
 static unsigned int get_aiff_header(AVIOContext *pb, AVCodecContext *codec,
                              int size, unsigned version)
 {
-    AVExtFloat ext;
+    int exp;
+    uint64_t val;
     double sample_rate;
     unsigned int num_frames;
 
@@ -99,8 +100,9 @@ static unsigned int get_aiff_header(AVIOContext *pb, AVCodecContext *codec,
     num_frames = avio_rb32(pb);
     codec->bits_per_coded_sample = avio_rb16(pb);
 
-    avio_read(pb, (uint8_t*)&ext, sizeof(ext));/* Sample rate is in */
-    sample_rate = av_ext2dbl(ext);          /* 80 bits BE IEEE extended float */
+    exp = avio_rb16(pb);
+    val = avio_rb64(pb);
+    sample_rate = ldexp(val, exp - 16383 - 63);
     codec->sample_rate = sample_rate;
     size -= 18;
 
diff --git a/libavformat/aiffenc.c b/libavformat/aiffenc.c
index df43688d40..2916d26fc6 100644
--- a/libavformat/aiffenc.c
+++ b/libavformat/aiffenc.c
@@ -19,7 +19,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#include "libavutil/intfloat_readwrite.h"
+#include "libavutil/intfloat.h"
 #include "avformat.h"
 #include "internal.h"
 #include "aiff.h"
@@ -36,7 +36,7 @@ static int aiff_write_header(AVFormatContext *s)
     AIFFOutputContext *aiff = s->priv_data;
     AVIOContext *pb = s->pb;
     AVCodecContext *enc = s->streams[0]->codec;
-    AVExtFloat sample_rate;
+    uint64_t sample_rate;
     int aifc = 0;
 
     /* First verify if format is ok */
@@ -82,8 +82,9 @@ static int aiff_write_header(AVFormatContext *s)
 
     avio_wb16(pb, enc->bits_per_coded_sample); /* Sample size */
 
-    sample_rate = av_dbl2ext((double)enc->sample_rate);
-    avio_write(pb, (uint8_t*)&sample_rate, sizeof(sample_rate));
+    sample_rate = av_double2int(enc->sample_rate);
+    avio_wb16(pb, (sample_rate >> 52) + (16383 - 1023));
+    avio_wb64(pb, UINT64_C(1) << 63 | sample_rate << 11);
 
     if (aifc) {
         avio_wl32(pb, enc->codec_tag);
diff --git a/libavformat/cafdec.c b/libavformat/cafdec.c
index 36d7ad431d..4efc40f1af 100644
--- a/libavformat/cafdec.c
+++ b/libavformat/cafdec.c
@@ -30,7 +30,7 @@
 #include "riff.h"
 #include "isom.h"
 #include "libavutil/intreadwrite.h"
-#include "libavutil/intfloat_readwrite.h"
+#include "libavutil/intfloat.h"
 #include "libavutil/dict.h"
 #include "caf.h"
 
@@ -68,7 +68,7 @@ static int read_desc_chunk(AVFormatContext *s)
 
     /* parse format description */
     st->codec->codec_type  = AVMEDIA_TYPE_AUDIO;
-    st->codec->sample_rate = av_int2dbl(avio_rb64(pb));
+    st->codec->sample_rate = av_int2double(avio_rb64(pb));
     st->codec->codec_tag   = avio_rb32(pb);
     flags = avio_rb32(pb);
     caf->bytes_per_packet  = avio_rb32(pb);
diff --git a/libavformat/ffmdec.c b/libavformat/ffmdec.c
index 114576707e..9cee3ad64f 100644
--- a/libavformat/ffmdec.c
+++ b/libavformat/ffmdec.c
@@ -20,7 +20,7 @@
  */
 
 #include "libavutil/intreadwrite.h"
-#include "libavutil/intfloat_readwrite.h"
+#include "libavutil/intfloat.h"
 #include "avformat.h"
 #include "internal.h"
 #include "ffm.h"
@@ -325,10 +325,10 @@ static int ffm_read_header(AVFormatContext *s, AVFormatParameters *ap)
             codec->rc_max_rate = avio_rb32(pb);
             codec->rc_min_rate = avio_rb32(pb);
             codec->rc_buffer_size = avio_rb32(pb);
-            codec->i_quant_factor = av_int2dbl(avio_rb64(pb));
-            codec->b_quant_factor = av_int2dbl(avio_rb64(pb));
-            codec->i_quant_offset = av_int2dbl(avio_rb64(pb));
-            codec->b_quant_offset = av_int2dbl(avio_rb64(pb));
+            codec->i_quant_factor = av_int2double(avio_rb64(pb));
+            codec->b_quant_factor = av_int2double(avio_rb64(pb));
+            codec->i_quant_offset = av_int2double(avio_rb64(pb));
+            codec->b_quant_offset = av_int2double(avio_rb64(pb));
             codec->dct_algo = avio_rb32(pb);
             codec->strict_std_compliance = avio_rb32(pb);
             codec->max_b_frames = avio_rb32(pb);
@@ -340,7 +340,7 @@ static int ffm_read_header(AVFormatContext *s, AVFormatParameters *ap)
             codec->mb_decision = avio_rb32(pb);
             codec->nsse_weight = avio_rb32(pb);
             codec->frame_skip_cmp = avio_rb32(pb);
-            codec->rc_buffer_aggressivity = av_int2dbl(avio_rb64(pb));
+            codec->rc_buffer_aggressivity = av_int2double(avio_rb64(pb));
             codec->codec_tag = avio_rb32(pb);
             codec->thread_count = avio_r8(pb);
             codec->coder_type = avio_rb32(pb);
@@ -350,8 +350,8 @@ static int ffm_read_header(AVFormatContext *s, AVFormatParameters *ap)
             codec->keyint_min = avio_rb32(pb);
             codec->scenechange_threshold = avio_rb32(pb);
             codec->b_frame_strategy = avio_rb32(pb);
-            codec->qcompress = av_int2dbl(avio_rb64(pb));
-            codec->qblur = av_int2dbl(avio_rb64(pb));
+            codec->qcompress = av_int2double(avio_rb64(pb));
+            codec->qblur = av_int2double(avio_rb64(pb));
             codec->max_qdiff = avio_rb32(pb);
             codec->refs = avio_rb32(pb);
             break;
diff --git a/libavformat/ffmenc.c b/libavformat/ffmenc.c
index af32e71b7d..d304f57ac4 100644
--- a/libavformat/ffmenc.c
+++ b/libavformat/ffmenc.c
@@ -20,7 +20,7 @@
  */
 
 #include "libavutil/intreadwrite.h"
-#include "libavutil/intfloat_readwrite.h"
+#include "libavutil/intfloat.h"
 #include "avformat.h"
 #include "internal.h"
 #include "ffm.h"
@@ -137,10 +137,10 @@ static int ffm_write_header(AVFormatContext *s)
             avio_wb32(pb, codec->rc_max_rate);
             avio_wb32(pb, codec->rc_min_rate);
             avio_wb32(pb, codec->rc_buffer_size);
-            avio_wb64(pb, av_dbl2int(codec->i_quant_factor));
-            avio_wb64(pb, av_dbl2int(codec->b_quant_factor));
-            avio_wb64(pb, av_dbl2int(codec->i_quant_offset));
-            avio_wb64(pb, av_dbl2int(codec->b_quant_offset));
+            avio_wb64(pb, av_double2int(codec->i_quant_factor));
+            avio_wb64(pb, av_double2int(codec->b_quant_factor));
+            avio_wb64(pb, av_double2int(codec->i_quant_offset));
+            avio_wb64(pb, av_double2int(codec->b_quant_offset));
             avio_wb32(pb, codec->dct_algo);
             avio_wb32(pb, codec->strict_std_compliance);
             avio_wb32(pb, codec->max_b_frames);
@@ -152,7 +152,7 @@ static int ffm_write_header(AVFormatContext *s)
             avio_wb32(pb, codec->mb_decision);
             avio_wb32(pb, codec->nsse_weight);
             avio_wb32(pb, codec->frame_skip_cmp);
-            avio_wb64(pb, av_dbl2int(codec->rc_buffer_aggressivity));
+            avio_wb64(pb, av_double2int(codec->rc_buffer_aggressivity));
             avio_wb32(pb, codec->codec_tag);
             avio_w8(pb, codec->thread_count);
             avio_wb32(pb, codec->coder_type);
@@ -162,8 +162,8 @@ static int ffm_write_header(AVFormatContext *s)
             avio_wb32(pb, codec->keyint_min);
             avio_wb32(pb, codec->scenechange_threshold);
             avio_wb32(pb, codec->b_frame_strategy);
-            avio_wb64(pb, av_dbl2int(codec->qcompress));
-            avio_wb64(pb, av_dbl2int(codec->qblur));
+            avio_wb64(pb, av_double2int(codec->qcompress));
+            avio_wb64(pb, av_double2int(codec->qblur));
             avio_wb32(pb, codec->max_qdiff);
             avio_wb32(pb, codec->refs);
             break;
diff --git a/libavformat/flvdec.c b/libavformat/flvdec.c
index 51a8126904..4fc5a4949e 100644
--- a/libavformat/flvdec.c
+++ b/libavformat/flvdec.c
@@ -26,7 +26,7 @@
 
 #include "libavutil/avstring.h"
 #include "libavutil/dict.h"
-#include "libavutil/intfloat_readwrite.h"
+#include "libavutil/intfloat.h"
 #include "libavutil/mathematics.h"
 #include "libavcodec/bytestream.h"
 #include "libavcodec/mpeg4audio.h"
@@ -189,7 +189,7 @@ static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, AVStream
         for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
             if (avio_r8(ioc) != AMF_DATA_TYPE_NUMBER)
                 goto finish;
-            num_val = av_int2dbl(avio_rb64(ioc));
+            num_val = av_int2double(avio_rb64(ioc));
             current_array[i] = num_val;
         }
         if (times && filepositions) {
@@ -230,7 +230,7 @@ static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vst
 
     switch(amf_type) {
         case AMF_DATA_TYPE_NUMBER:
-            num_val = av_int2dbl(avio_rb64(ioc)); break;
+            num_val = av_int2double(avio_rb64(ioc)); break;
         case AMF_DATA_TYPE_BOOL:
             num_val = avio_r8(ioc); break;
         case AMF_DATA_TYPE_STRING:
diff --git a/libavformat/flvenc.c b/libavformat/flvenc.c
index 84466aa8a0..dfa17e0374 100644
--- a/libavformat/flvenc.c
+++ b/libavformat/flvenc.c
@@ -19,7 +19,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#include "libavutil/intfloat_readwrite.h"
+#include "libavutil/intfloat.h"
 #include "avformat.h"
 #include "flv.h"
 #include "internal.h"
@@ -162,7 +162,7 @@ static void put_avc_eos_tag(AVIOContext *pb, unsigned ts) {
 static void put_amf_double(AVIOContext *pb, double d)
 {
     avio_w8(pb, AMF_DATA_TYPE_NUMBER);
-    avio_wb64(pb, av_dbl2int(d));
+    avio_wb64(pb, av_double2int(d));
 }
 
 static void put_amf_bool(AVIOContext *pb, int b) {
diff --git a/libavformat/gxfenc.c b/libavformat/gxfenc.c
index 69650c697b..124064fc55 100644
--- a/libavformat/gxfenc.c
+++ b/libavformat/gxfenc.c
@@ -19,7 +19,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#include "libavutil/intfloat_readwrite.h"
+#include "libavutil/intfloat.h"
 #include "libavutil/mathematics.h"
 #include "avformat.h"
 #include "internal.h"
@@ -520,8 +520,8 @@ static int gxf_write_umf_media_dv(AVIOContext *pb, GXFStreamContext *sc)
 
 static int gxf_write_umf_media_audio(AVIOContext *pb, GXFStreamContext *sc)
 {
-    avio_wl64(pb, av_dbl2int(1)); /* sound level to begin to */
-    avio_wl64(pb, av_dbl2int(1)); /* sound level to begin to */
+    avio_wl64(pb, av_double2int(1)); /* sound level to begin to */
+    avio_wl64(pb, av_double2int(1)); /* sound level to begin to */
     avio_wl32(pb, 0); /* number of fields over which to ramp up sound level */
     avio_wl32(pb, 0); /* number of fields over which to ramp down sound level */
     avio_wl32(pb, 0); /* reserved */
diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
index b61c819ce3..2684d6e6d9 100644
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@@ -38,7 +38,7 @@
 #include "rm.h"
 #include "matroska.h"
 #include "libavcodec/mpeg4audio.h"
-#include "libavutil/intfloat_readwrite.h"
+#include "libavutil/intfloat.h"
 #include "libavutil/intreadwrite.h"
 #include "libavutil/avstring.h"
 #include "libavutil/lzo.h"
@@ -624,9 +624,9 @@ static int ebml_read_float(AVIOContext *pb, int size, double *num)
     if (size == 0) {
         *num = 0;
     } else if (size == 4) {
-        *num= av_int2flt(avio_rb32(pb));
-    } else if(size==8){
-        *num= av_int2dbl(avio_rb64(pb));
+        *num = av_int2float(avio_rb32(pb));
+    } else if (size == 8){
+        *num = av_int2double(avio_rb64(pb));
     } else
         return AVERROR_INVALIDDATA;
 
diff --git a/libavformat/matroskaenc.c b/libavformat/matroskaenc.c
index 9f8d5d853b..e93dd65dff 100644
--- a/libavformat/matroskaenc.c
+++ b/libavformat/matroskaenc.c
@@ -29,7 +29,7 @@
 #include "avlanguage.h"
 #include "libavutil/samplefmt.h"
 #include "libavutil/intreadwrite.h"
-#include "libavutil/intfloat_readwrite.h"
+#include "libavutil/intfloat.h"
 #include "libavutil/mathematics.h"
 #include "libavutil/random_seed.h"
 #include "libavutil/lfg.h"
@@ -185,7 +185,7 @@ static void put_ebml_float(AVIOContext *pb, unsigned int elementid, double val)
 {
     put_ebml_id(pb, elementid);
     put_ebml_num(pb, 8, 0);
-    avio_wb64(pb, av_dbl2int(val));
+    avio_wb64(pb, av_double2int(val));
 }
 
 static void put_ebml_binary(AVIOContext *pb, unsigned int elementid,
diff --git a/libavformat/mov.c b/libavformat/mov.c
index eef53e6d66..d9fb8fb991 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -26,7 +26,7 @@
 //#define MOV_EXPORT_ALL_METADATA
 
 #include "libavutil/intreadwrite.h"
-#include "libavutil/intfloat_readwrite.h"
+#include "libavutil/intfloat.h"
 #include "libavutil/mathematics.h"
 #include "libavutil/avstring.h"
 #include "libavutil/dict.h"
@@ -1218,7 +1218,7 @@ int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
                     avio_rb32(pb); /* bytes per sample */
                 } else if (version==2) {
                     avio_rb32(pb); /* sizeof struct only */
-                    st->codec->sample_rate = av_int2dbl(avio_rb64(pb)); /* float 64 */
+                    st->codec->sample_rate = av_int2double(avio_rb64(pb)); /* float 64 */
                     st->codec->channels = avio_rb32(pb);
                     avio_rb32(pb); /* always 0x7F000000 */
                     st->codec->bits_per_coded_sample = avio_rb32(pb); /* bits per channel if sound is uncompressed */
diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 92588007ce..d1076c34c4 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -32,7 +32,7 @@
 #include "libavcodec/put_bits.h"
 #include "internal.h"
 #include "libavutil/avstring.h"
-#include "libavutil/intfloat_readwrite.h"
+#include "libavutil/intfloat.h"
 #include "libavutil/mathematics.h"
 #include "libavutil/opt.h"
 #include "libavutil/dict.h"
@@ -468,7 +468,7 @@ static int mov_write_audio_tag(AVIOContext *pb, MOVTrack *track)
         avio_wb16(pb, 0);
         avio_wb32(pb, 0x00010000);
         avio_wb32(pb, 72);
-        avio_wb64(pb, av_dbl2int(track->timescale));
+        avio_wb64(pb, av_double2int(track->timescale));
         avio_wb32(pb, track->enc->channels);
         avio_wb32(pb, 0x7F000000);
         avio_wb32(pb, av_get_bits_per_sample(track->enc->codec_id));
diff --git a/libavformat/nuv.c b/libavformat/nuv.c
index ddca4fecff..262c4c58e9 100644
--- a/libavformat/nuv.c
+++ b/libavformat/nuv.c
@@ -20,7 +20,7 @@
  */
 
 #include "libavutil/intreadwrite.h"
-#include "libavutil/intfloat_readwrite.h"
+#include "libavutil/intfloat.h"
 #include "avformat.h"
 #include "internal.h"
 #include "riff.h"
@@ -140,10 +140,10 @@ static int nuv_header(AVFormatContext *s, AVFormatParameters *ap) {
     avio_rl32(pb); // unused, "desiredheight"
     avio_r8(pb); // 'P' == progressive, 'I' == interlaced
     avio_skip(pb, 3); // padding
-    aspect = av_int2dbl(avio_rl64(pb));
+    aspect = av_int2double(avio_rl64(pb));
     if (aspect > 0.9999 && aspect < 1.0001)
         aspect = 4.0 / 3.0;
-    fps = av_int2dbl(avio_rl64(pb));
+    fps = av_int2double(avio_rl64(pb));
 
     // number of packets per stream type, -1 means unknown, e.g. streaming
     v_packs = avio_rl32(pb);
diff --git a/libavformat/rtmppkt.c b/libavformat/rtmppkt.c
index 6bf641a742..8c455a09f0 100644
--- a/libavformat/rtmppkt.c
+++ b/libavformat/rtmppkt.c
@@ -21,7 +21,7 @@
 
 #include "libavcodec/bytestream.h"
 #include "libavutil/avstring.h"
-#include "libavutil/intfloat_readwrite.h"
+#include "libavutil/intfloat.h"
 #include "avformat.h"
 
 #include "rtmppkt.h"
@@ -37,7 +37,7 @@ void ff_amf_write_bool(uint8_t **dst, int val)
 void ff_amf_write_number(uint8_t **dst, double val)
 {
     bytestream_put_byte(dst, AMF_DATA_TYPE_NUMBER);
-    bytestream_put_be64(dst, av_dbl2int(val));
+    bytestream_put_be64(dst, av_double2int(val));
 }
 
 void ff_amf_write_string(uint8_t **dst, const char *str)
@@ -318,7 +318,7 @@ int ff_amf_get_field_value(const uint8_t *data, const uint8_t *data_end,
         if (size == namelen && !memcmp(data-size, name, namelen)) {
             switch (*data++) {
             case AMF_DATA_TYPE_NUMBER:
-                snprintf(dst, dst_size, "%g", av_int2dbl(AV_RB64(data)));
+                snprintf(dst, dst_size, "%g", av_int2double(AV_RB64(data)));
                 break;
             case AMF_DATA_TYPE_BOOL:
                 snprintf(dst, dst_size, "%s", *data ? "true" : "false");
@@ -370,7 +370,7 @@ static void ff_amf_tag_contents(void *ctx, const uint8_t *data, const uint8_t *d
         return;
     switch (*data++) {
     case AMF_DATA_TYPE_NUMBER:
-        av_log(ctx, AV_LOG_DEBUG, " number %g\n", av_int2dbl(AV_RB64(data)));
+        av_log(ctx, AV_LOG_DEBUG, " number %g\n", av_int2double(AV_RB64(data)));
         return;
     case AMF_DATA_TYPE_BOOL:
         av_log(ctx, AV_LOG_DEBUG, " bool %d\n", *data);
diff --git a/libavformat/rtmpproto.c b/libavformat/rtmpproto.c
index 69acd864dc..53d912e3c6 100644
--- a/libavformat/rtmpproto.c
+++ b/libavformat/rtmpproto.c
@@ -26,7 +26,7 @@
 
 #include "libavcodec/bytestream.h"
 #include "libavutil/avstring.h"
-#include "libavutil/intfloat_readwrite.h"
+#include "libavutil/intfloat.h"
 #include "libavutil/lfg.h"
 #include "libavutil/sha.h"
 #include "avformat.h"
@@ -615,7 +615,7 @@ static int rtmp_parse_result(URLContext *s, RTMPContext *rt, RTMPPacket *pkt)
                 /* hack for Wowza Media Server, it does not send result for
                  * releaseStream and FCPublish calls */
                 if (!pkt->data[10]) {
-                    int pkt_id = (int) av_int2dbl(AV_RB64(pkt->data + 11));
+                    int pkt_id = av_int2double(AV_RB64(pkt->data + 11));
                     if (pkt_id == rt->create_stream_invoke)
                         rt->state = STATE_CONNECTING;
                 }
@@ -626,7 +626,7 @@ static int rtmp_parse_result(URLContext *s, RTMPContext *rt, RTMPPacket *pkt)
                 if (pkt->data[10] || pkt->data[19] != 5 || pkt->data[20]) {
                     av_log(s, AV_LOG_WARNING, "Unexpected reply on connect()\n");
                 } else {
-                    rt->main_channel_id = (int) av_int2dbl(AV_RB64(pkt->data + 21));
+                    rt->main_channel_id = av_int2double(AV_RB64(pkt->data + 21));
                 }
                 if (rt->is_input) {
                     gen_play(s, rt);
diff --git a/libavformat/soxdec.c b/libavformat/soxdec.c
index 3e426bea00..1074b3fb2a 100644
--- a/libavformat/soxdec.c
+++ b/libavformat/soxdec.c
@@ -30,7 +30,7 @@
  */
 
 #include "libavutil/intreadwrite.h"
-#include "libavutil/intfloat_readwrite.h"
+#include "libavutil/intfloat.h"
 #include "libavutil/dict.h"
 #include "avformat.h"
 #include "internal.h"
@@ -62,14 +62,14 @@ static int sox_read_header(AVFormatContext *s,
         st->codec->codec_id = CODEC_ID_PCM_S32LE;
         header_size         = avio_rl32(pb);
         avio_skip(pb, 8); /* sample count */
-        sample_rate         = av_int2dbl(avio_rl64(pb));
+        sample_rate         = av_int2double(avio_rl64(pb));
         st->codec->channels = avio_rl32(pb);
         comment_size        = avio_rl32(pb);
     } else {
         st->codec->codec_id = CODEC_ID_PCM_S32BE;
         header_size         = avio_rb32(pb);
         avio_skip(pb, 8); /* sample count */
-        sample_rate         = av_int2dbl(avio_rb64(pb));
+        sample_rate         = av_int2double(avio_rb64(pb));
         st->codec->channels = avio_rb32(pb);
         comment_size        = avio_rb32(pb);
     }
diff --git a/libavformat/soxenc.c b/libavformat/soxenc.c
index b89203c542..55d5bd98c0 100644
--- a/libavformat/soxenc.c
+++ b/libavformat/soxenc.c
@@ -30,7 +30,7 @@
  */
 
 #include "libavutil/intreadwrite.h"
-#include "libavutil/intfloat_readwrite.h"
+#include "libavutil/intfloat.h"
 #include "libavutil/dict.h"
 #include "avformat.h"
 #include "avio_internal.h"
@@ -59,14 +59,14 @@ static int sox_write_header(AVFormatContext *s)
         ffio_wfourcc(pb, ".SoX");
         avio_wl32(pb, sox->header_size);
         avio_wl64(pb, 0); /* number of samples */
-        avio_wl64(pb, av_dbl2int(enc->sample_rate));
+        avio_wl64(pb, av_double2int(enc->sample_rate));
         avio_wl32(pb, enc->channels);
         avio_wl32(pb, comment_size);
     } else if (enc->codec_id == CODEC_ID_PCM_S32BE) {
         ffio_wfourcc(pb, "XoS.");
         avio_wb32(pb, sox->header_size);
         avio_wb64(pb, 0); /* number of samples */
-        avio_wb64(pb, av_dbl2int(enc->sample_rate));
+        avio_wb64(pb, av_double2int(enc->sample_rate));
         avio_wb32(pb, enc->channels);
         avio_wb32(pb, comment_size);
     } else {
diff --git a/libavformat/thp.c b/libavformat/thp.c
index 5b1d180f4b..25efcbba82 100644
--- a/libavformat/thp.c
+++ b/libavformat/thp.c
@@ -20,7 +20,7 @@
  */
 
 #include "libavutil/intreadwrite.h"
-#include "libavutil/intfloat_readwrite.h"
+#include "libavutil/intfloat.h"
 #include "avformat.h"
 #include "internal.h"
 
@@ -69,7 +69,7 @@ static int thp_read_header(AVFormatContext *s,
                            avio_rb32(pb); /* Max buf size.  */
                            avio_rb32(pb); /* Max samples.  */
 
-    thp->fps             = av_d2q(av_int2flt(avio_rb32(pb)), INT_MAX);
+    thp->fps             = av_d2q(av_int2float(avio_rb32(pb)), INT_MAX);
     thp->framecnt        = avio_rb32(pb);
     thp->first_framesz   = avio_rb32(pb);
                            avio_rb32(pb); /* Data size.  */
diff --git a/libavformat/wtv.c b/libavformat/wtv.c
index 0cef6fb240..e4b9ae573a 100644
--- a/libavformat/wtv.c
+++ b/libavformat/wtv.c
@@ -26,7 +26,7 @@
  */
 
 #include "libavutil/intreadwrite.h"
-#include "libavutil/intfloat_readwrite.h"
+#include "libavutil/intfloat.h"
 #include "libavutil/dict.h"
 #include "avformat.h"
 #include "internal.h"
@@ -458,7 +458,7 @@ static void crazytime_to_iso8601(char *buf, int buf_size, int64_t value)
  */
 static void oledate_to_iso8601(char *buf, int buf_size, int64_t value)
 {
-    time_t t = 631112400LL + 86400*av_int2dbl(value);
+    time_t t = 631112400LL + 86400*av_int2double(value);
     strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
 }
 
@@ -523,7 +523,7 @@ static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int ty
         else if (!strcmp(key, "WM/WMRVExpirationDate"))
             oledate_to_iso8601(buf, buf_size, num);
         else if (!strcmp(key, "WM/WMRVBitrate"))
-            snprintf(buf, buf_size, "%f", av_int2dbl(num));
+            snprintf(buf, buf_size, "%f", av_int2double(num));
         else
             snprintf(buf, buf_size, "%"PRIi64, num);
     } else if (type == 5 && length == 2) {
diff --git a/libavutil/intfloat.h b/libavutil/intfloat.h
new file mode 100644
index 0000000000..9db624a6ce
--- /dev/null
+++ b/libavutil/intfloat.h
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2011 Mans Rullgard
+ *
+ * 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 AVUTIL_INTFLOAT_H
+#define AVUTIL_INTFLOAT_H
+
+#include <stdint.h>
+#include "attributes.h"
+
+union av_intfloat32 {
+    uint32_t i;
+    float    f;
+};
+
+union av_intfloat64 {
+    uint64_t i;
+    double   f;
+};
+
+/**
+ * Reinterpret a 32-bit integer as a float.
+ */
+static av_always_inline float av_int2float(uint32_t i)
+{
+    union av_intfloat32 v = { .i = i };
+    return v.f;
+}
+
+/**
+ * Reinterpret a float as a 32-bit integer.
+ */
+static av_always_inline uint32_t av_float2int(float f)
+{
+    union av_intfloat32 v = { .f = f };
+    return v.i;
+}
+
+/**
+ * Reinterpret a 64-bit integer as a double.
+ */
+static av_always_inline double av_int2double(uint64_t i)
+{
+    union av_intfloat64 v = { .i = i };
+    return v.f;
+}
+
+/**
+ * Reinterpret a double as a 64-bit integer.
+ */
+static av_always_inline uint64_t av_double2int(double f)
+{
+    union av_intfloat64 v = { .f = f };
+    return v.i;
+}
+
+#endif /* AVUTIL_INTFLOAT_H */
diff --git a/libavutil/intfloat_readwrite.h b/libavutil/intfloat_readwrite.h
index 10ecbed76c..f093b92cd2 100644
--- a/libavutil/intfloat_readwrite.h
+++ b/libavutil/intfloat_readwrite.h
@@ -30,11 +30,11 @@ typedef struct AVExtFloat  {
     uint8_t mantissa[8];
 } AVExtFloat;
 
-double av_int2dbl(int64_t v) av_const;
-float av_int2flt(int32_t v) av_const;
-double av_ext2dbl(const AVExtFloat ext) av_const;
-int64_t av_dbl2int(double d) av_const;
-int32_t av_flt2int(float d) av_const;
-AVExtFloat av_dbl2ext(double d) av_const;
+attribute_deprecated double av_int2dbl(int64_t v) av_const;
+attribute_deprecated float av_int2flt(int32_t v) av_const;
+attribute_deprecated double av_ext2dbl(const AVExtFloat ext) av_const;
+attribute_deprecated int64_t av_dbl2int(double d) av_const;
+attribute_deprecated int32_t av_flt2int(float d) av_const;
+attribute_deprecated AVExtFloat av_dbl2ext(double d) av_const;
 
 #endif /* AVUTIL_INTFLOAT_READWRITE_H */