Added a small vlc_fourcc_GetCodecFromString helper.

include/vlc_fourcc.h

@@ -313,7 +313,7 @@
 #define VLC_CODEC_MP3       VLC_FOURCC('m','p','3',' ')
 
 /**
- * It returns the codec associatedto a fourcc within a ES category.
+ * It returns the codec associated to a fourcc within a ES category.
  *
  * If not found, it will return the given fourcc.
  * If found, it will allways be one of the VLC_CODEC_ defined above.
@@ -322,6 +322,17 @@
  */
 VLC_EXPORT( vlc_fourcc_t, vlc_fourcc_GetCodec, ( int i_cat, vlc_fourcc_t i_fourcc ) );
 
+/**
+ * It returns the codec associated to a fourcc store in a zero terminated
+ * string.
+ *
+ * If the string is NULL or does not have exactly 4 charateres, it will
+ * return 0, otherwise it behaves like vlc_fourcc_GetCodec.
+ *
+ * Provided for convenience.
+ */
+VLC_EXPORT( vlc_fourcc_t, vlc_fourcc_GetCodecFromString, ( int i_cat, const char * ) );
+
 /**
  * It returns the description of the given fourcc or NULL if not found.
  *

src/libvlccore.sym

@@ -453,6 +453,7 @@ vlc_event_send
 __vlc_execve
 vlc_fastmem_register
 vlc_fourcc_GetCodec
+vlc_fourcc_GetCodecFromString
 vlc_fourcc_GetDescription
 vlc_freeaddrinfo
 vlc_gai_strerror

src/misc/fourcc.c

@@ -1186,6 +1186,15 @@ vlc_fourcc_t vlc_fourcc_GetCodec( int i_cat, vlc_fourcc_t i_fourcc )
     return CreateFourcc( e.p_class );
 }
 
+vlc_fourcc_t vlc_fourcc_GetCodecFromString( int i_cat, const char *psz_fourcc )
+{
+    if( !psz_fourcc || strlen(psz_fourcc) != 4 )
+        return 0;
+    return vlc_fourcc_GetCodec( i_cat,
+                                VLC_FOURCC( psz_fourcc[0], psz_fourcc[1],
+                                            psz_fourcc[2], psz_fourcc[3] ) );
+}
+
 /* */
 const char *vlc_fourcc_GetDescription( int i_cat, vlc_fourcc_t i_fourcc )
 {