initial nut muxer and demuxer (demuxer is not fail safe)

Originally committed as revision 2211 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/Makefile

@@ -14,7 +14,8 @@ PPOBJS=
 # mux and demuxes
 OBJS+=mpeg.o mpegts.o mpegtsenc.o ffm.o crc.o img.o raw.o rm.o \
       avienc.o avidec.o wav.o swf.o au.o gif.o mov.o mpjpeg.o dvcore.o dv.o \
-      yuv4mpeg.o 4xm.o flvenc.o flvdec.o movenc.o psxstr.o idroq.o ipmovie.o
+      yuv4mpeg.o 4xm.o flvenc.o flvdec.o movenc.o psxstr.o idroq.o ipmovie.o \
+      nut.o
 
 ifeq ($(CONFIG_RISKY),yes)
 OBJS+= asf.o

libavformat/allformats.c

@@ -78,6 +78,8 @@ void av_register_all(void)
     dv1394_init();
 #endif
 
+    nut_init();
+
     /* image formats */
     av_register_image_format(&pnm_image_format);
     av_register_image_format(&pbm_image_format);

libavformat/avformat.h

@@ -392,6 +392,9 @@ int roq_init(void);
 /* ipmovie.c */
 int ipmovie_init(void);
 
+/* nut.c */
+int nut_init(void);
+
 #include "rtp.h"
 
 #include "rtsp.h"

libavformat/avienc.c

@@ -184,6 +184,21 @@ unsigned int codec_get_bmp_tag(int id)
     return codec_get_tag(codec_bmp_tags, id);
 }
 
+unsigned int codec_get_wav_tag(int id)
+{
+    return codec_get_tag(codec_wav_tags, id);
+}
+
+enum CodecID codec_get_bmp_id(unsigned int tag)
+{
+    return codec_get_id(codec_bmp_tags, tag);
+}
+
+enum CodecID codec_get_wav_id(unsigned int tag)
+{
+    return codec_get_id(codec_wav_tags, tag);
+}
+
 /* BITMAPINFOHEADER header */
 void put_bmp_header(ByteIOContext *pb, AVCodecContext *enc, const CodecTag *tags, int for_asf)
 {