[FFmpeg-cvslog] nut: use a define for the nut version

[Luca Barbato]

ffmpeg | branch: master | Luca Barbato <lu_zero at gentoo.org> | Sat May  4 12:47:15 2013 +0200| [46c1917350f58dfab84e41919e6c02d43950db8c] | committer: Luca Barbato

nut: use a define for the nut version

Ease switching version in the future and make evident why that value.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=46c1917350f58dfab84e41919e6c02d43950db8c
---

 libavformat/nut.h    |    2 ++
 libavformat/nutdec.c |    2 +-
 libavformat/nutenc.c |    2 +-
 3 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/libavformat/nut.h b/libavformat/nut.h
index 89b0248..8e5767d 100644
--- a/libavformat/nut.h
+++ b/libavformat/nut.h
@@ -39,6 +39,8 @@
 
 #define MAX_DISTANCE (1024*32-1)
 
+#define NUT_VERSION 3
+
 typedef enum{
     FLAG_KEY        =   1, ///<if set, frame is keyframe
     FLAG_EOR        =   2, ///<if set, stream has no relevance on presentation. (EOR)
diff --git a/libavformat/nutdec.c b/libavformat/nutdec.c
index cee411b..00c9ae3 100644
--- a/libavformat/nutdec.c
+++ b/libavformat/nutdec.c
@@ -213,7 +213,7 @@ static int decode_main_header(NUTContext *nut)
     end  = get_packetheader(nut, bc, 1, MAIN_STARTCODE);
     end += avio_tell(bc);
 
-    GET_V(tmp, tmp >= 2 && tmp <= 3);
+    GET_V(tmp, tmp >= 2 && tmp <= NUT_VERSION);
     GET_V(stream_count, tmp > 0 && tmp <= NUT_MAX_STREAMS);
 
     nut->max_distance = ffio_read_varlen(bc);
diff --git a/libavformat/nutenc.c b/libavformat/nutenc.c
index df70f94..7234cd9 100644
--- a/libavformat/nutenc.c
+++ b/libavformat/nutenc.c
@@ -323,7 +323,7 @@ static void write_mainheader(NUTContext *nut, AVIOContext *bc)
         tmp_head_idx;
     int64_t tmp_match;
 
-    ff_put_v(bc, 3); /* version */
+    ff_put_v(bc, NUT_VERSION);
     ff_put_v(bc, nut->avf->nb_streams);
     ff_put_v(bc, nut->max_distance);
     ff_put_v(bc, nut->time_base_count);