avio: Support private options in URLProtocols

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

libavformat/avio.c

@@ -145,8 +145,31 @@ static int url_alloc_for_protocol (URLContext **puc, struct URLProtocol *up,
     if (up->priv_data_size) {
         uc->priv_data = av_mallocz(up->priv_data_size);
         if (up->priv_data_class) {
+            char *start = strchr(uc->filename, ',');
             *(const AVClass**)uc->priv_data = up->priv_data_class;
             av_opt_set_defaults(uc->priv_data);
+            if(start){
+                int ret= 0;
+                char *p= start;
+                char sep= *++p;
+                char *key, *val;
+                p++;
+                while(ret >= 0 && (key= strchr(p, sep)) && p<key && (val = strchr(key+1, sep))){
+                    *val= *key= 0;
+                    ret= av_opt_set(uc->priv_data, p, key+1, 0);
+                    if (ret == AVERROR_OPTION_NOT_FOUND)
+                        av_log(uc, AV_LOG_ERROR, "Key '%s' not found.\n", p);
+                    *val= *key= sep;
+                    p= val+1;
+                }
+                if(ret<0 || p!=key){
+                    av_log(uc, AV_LOG_ERROR, "Error parsing options string %s\n", start);
+                    av_freep(&uc->priv_data);
+                    av_freep(&uc);
+                    goto fail;
+                }
+                memmove(start, key+1, strlen(key));
+            }
         }
     }
     if (int_cb)
@@ -277,6 +300,8 @@ int ffurl_alloc(URLContext **puc, const char *filename, int flags,
     else
         av_strlcpy(proto_str, filename, FFMIN(proto_end-filename+1, sizeof(proto_str)));
 
+    if ((ptr = strchr(proto_str, ',')))
+        *ptr = '\0';
     av_strlcpy(proto_nested, proto_str, sizeof(proto_nested));
     if ((ptr = strchr(proto_nested, '+')))
         *ptr = '\0';