http/utils: move mime -> demuxer maping from http to utils

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/http.c

@@ -357,10 +357,8 @@ static int process_line(URLContext *h, char *line, int line_count,
                 s->willclose = 1;
         } else if (!av_strcasecmp (tag, "Server") && !av_strcasecmp (p, "AkamaiGHost")) {
             s->is_akamai = 1;
-        } else if (!av_strcasecmp (tag, "Content-Type")) {
-            if (!av_strcasecmp (p, "audio/aacp")) {
-                av_free(s->demuxer); s->demuxer = av_strdup("aac");
-            }
+        } else if (!av_strcasecmp (tag, "Content-Type") && p) {
+            av_free(s->demuxer); s->demuxer = av_strdup(p);
         }
     }
     return 1;

libavformat/utils.c

@@ -429,7 +429,9 @@ int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
     }
 
     if (!*fmt && pb && pb->av_class && av_opt_get(pb, "demuxer", AV_OPT_SEARCH_CHILDREN, &demuxer_name) >= 0 && demuxer_name) {
-        *fmt = av_find_input_format(demuxer_name);
+        if (!av_strcasecmp(demuxer_name, "audio/aacp")) {
+            *fmt = av_find_input_format("aac");
+        }
     }
 
     for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;