avio: Rename avclass symbols relating to avio

Don't prefix them ffio_url, which is misleading, sounding too
much like the urlprotocol layer (like ffurl_*).
Signed-off-by: Martin Storsjö <martin@martin.st>

libavformat/avio_internal.h

@@ -25,7 +25,7 @@
 
 #include "libavutil/log.h"
 
-extern const AVClass ffio_url_class;
+extern const AVClass ff_avio_class;
 
 int ffio_init_context(AVIOContext *s,
                   unsigned char *buffer,

libavformat/aviobuf.c

@@ -40,28 +40,28 @@
  */
 #define SHORT_SEEK_THRESHOLD 4096
 
-static void *ffio_url_child_next(void *obj, void *prev)
+static void *ff_avio_child_next(void *obj, void *prev)
 {
     AVIOContext *s = obj;
     return prev ? NULL : s->opaque;
 }
 
-static const AVClass *ffio_url_child_class_next(const AVClass *prev)
+static const AVClass *ff_avio_child_class_next(const AVClass *prev)
 {
     return prev ? NULL : &ffurl_context_class;
 }
 
-static const AVOption ffio_url_options[] = {
+static const AVOption ff_avio_options[] = {
     { NULL },
 };
 
-const AVClass ffio_url_class = {
+const AVClass ff_avio_class = {
     .class_name = "AVIOContext",
     .item_name  = av_default_item_name,
     .version    = LIBAVUTIL_VERSION_INT,
-    .option     = ffio_url_options,
-    .child_next = ffio_url_child_next,
-    .child_class_next = ffio_url_child_class_next,
+    .option     = ff_avio_options,
+    .child_next = ff_avio_child_next,
+    .child_class_next = ff_avio_child_class_next,
 };
 
 static void fill_buffer(AVIOContext *s);
@@ -703,7 +703,7 @@ int ffio_fdopen(AVIOContext **s, URLContext *h)
         (*s)->read_pause = (int (*)(void *, int))h->prot->url_read_pause;
         (*s)->read_seek  = (int64_t (*)(void *, int, int64_t, int))h->prot->url_read_seek;
     }
-    (*s)->av_class = &ffio_url_class;
+    (*s)->av_class = &ff_avio_class;
     return 0;
 }
 

libavformat/options.c

@@ -55,7 +55,7 @@ static const AVClass *format_child_class_next(const AVClass *prev)
     AVOutputFormat *ofmt = NULL;
 
     if (!prev)
-        return &ffio_url_class;
+        return &ff_avio_class;
 
     while ((ifmt = av_iformat_next(ifmt)))
         if (ifmt->priv_class == prev)