fast header checker added

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@4711 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 9 insertions, 0 deletions

diff --git a/libmpdemux/mp3_hdr.h b/libmpdemux/mp3_hdr.h
new file mode 100644
index 0000000000..9635760a95
--- /dev/null
+++ b/libmpdemux/mp3_hdr.h
@@ -0,0 +1,9 @@
+
+int mp_decode_mp3_header(unsigned char* hbuf);
+
+static inline int mp_check_mp3_header(unsigned int head){
+    if( (head & 0x0000e0ff) != 0x0000e0ff ||  
+        (head & 0x00fc0000) == 0x00fc0000) return 0;
+    if(mp_decode_mp3_header((unsigned char*)(&head))<=0) return 0;
+    return 1;
+}