added url_get_filename()

Originally committed as revision 1438 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/avio.c

@@ -61,11 +61,12 @@ int url_open(URLContext **puc, const char *filename, int flags)
     err = -ENOENT;
     goto fail;
  found:
-    uc = av_malloc(sizeof(URLContext));
+    uc = av_malloc(sizeof(URLContext) + strlen(filename));
     if (!uc) {
         err = -ENOMEM;
         goto fail;
     }
+    strcpy(uc->filename, filename);
     uc->prot = up;
     uc->flags = flags;
     uc->is_streamed = 0; /* default = not streamed */
@@ -154,3 +155,8 @@ int url_get_max_packet_size(URLContext *h)
 {
     return h->max_packet_size;
 }
+
+void url_get_filename(URLContext *h, char *buf, int buf_size)
+{
+    pstrcpy(buf, buf_size, h->filename);
+}

libavformat/avio.h

@@ -13,6 +13,7 @@ struct URLContext {
     int is_streamed;  /* true if streamed (no seek possible), default = false */
     int max_packet_size;  /* if non zero, the stream is packetized with this max packet size */
     void *priv_data;
+    char filename[1]; /* specified filename */
 };
 
 typedef struct URLContext URLContext;
@@ -35,6 +36,8 @@ int url_close(URLContext *h);
 int url_exist(const char *filename);
 offset_t url_filesize(URLContext *h);
 int url_get_max_packet_size(URLContext *h);
+void url_get_filename(URLContext *h, char *buf, int buf_size);
+
 /* not implemented */
 int url_poll(URLPollEntry *poll_table, int n, int timeout);