Metadata support for Buffersize gt 1K

Author: pschatzmann

src/AudioMetaData/MetaDataID3.h

@@ -69,7 +69,11 @@ class MetaDataID3Base {
 
     /// find the tag position in the string - if not found we return -1;
     int findTag(const char* tag, const char*str, size_t len){
-        if (len>1600 || str==nullptr || len<=0) return -1;
+        if (str==nullptr || len<=0) return -1;
+        // The tags are usally in the first 500 bytes - we limit the search
+        if (len>1600){
+            len = 1600;
+        }
         size_t tag_len = strlen(tag);
         for (size_t j=0;j<=len-tag_len-1;j++){
             if (memcmp(str+j,tag, tag_len)==0){
@@ -422,8 +426,10 @@ class MetaDataID3V2 : public MetaDataID3Base  {
                         int l = min(calcSize(frame_header.size)-1, (uint32_t) 256);
                         memset(result,0,256);
                         strncpy((char*)result, (char*) data+tag_pos+ID3FrameSize, l);
-                        if (isAscii(l))
+                        int checkLen = min(l, 10);
+                        if (isAscii(checkLen)){
                             processNotify();
+                        }
                     } else {
                         partial_tag = tag;
                     }