lavf/avio: Extend API with avio_move() and avio_delete()

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

doc/APIchanges

@@ -15,6 +15,10 @@ libavutil:     2014-08-09
 
 API changes, most recent first:
 
+2015-xx-xx - xxxxxxx - lavf 56.38.100 - avio.h url.h
+  Add avio_move(), avio_delete().
+  Extend URLProtocol with url_move(), url_delete().
+
 -------- 8< --------- FFmpeg 2.7 was cut here -------- 8< ---------
 
 2015-06-04 - cc17b43 - lswr  1.2.100

libavformat/avio.c

@@ -421,6 +421,44 @@ int avio_check(const char *url, int flags)
     return ret;
 }
 
+int avio_move(const char *url_src, const char *url_dst)
+{
+    URLContext *h_src, *h_dst;
+    int ret = ffurl_alloc(&h_src, url_src, AVIO_FLAG_READ_WRITE, NULL);
+    if (ret < 0)
+        return ret;
+    ret = ffurl_alloc(&h_dst, url_dst, AVIO_FLAG_WRITE, NULL);
+    if (ret < 0) {
+        ffurl_close(h_src);
+        return ret;
+    }
+
+    if (h_src->prot == h_dst->prot && h_src->prot->url_move)
+        ret = h_src->prot->url_move(h_src, h_dst);
+    else
+        ret = AVERROR(ENOSYS);
+
+    ffurl_close(h_src);
+    ffurl_close(h_dst);
+    return ret;
+}
+
+int avio_delete(const char *url)
+{
+    URLContext *h;
+    int ret = ffurl_alloc(&h, url, AVIO_FLAG_WRITE, NULL);
+    if (ret < 0)
+        return ret;
+
+    if (h->prot->url_delete)
+        ret = h->prot->url_delete(h);
+    else
+        ret = AVERROR(ENOSYS);
+
+    ffurl_close(h);
+    return ret;
+}
+
 int avio_open_dir(AVIODirContext **s, const char *url, AVDictionary **options)
 {
     URLContext *h = NULL;

libavformat/avio.h

@@ -229,6 +229,25 @@ const char *avio_find_protocol_name(const char *url);
  */
 int avio_check(const char *url, int flags);
 
+/**
+ * Move or rename a resource.
+ *
+ * @note url_src and url_dst should share the same protocol and authority.
+ *
+ * @param url_src url to resource to be moved
+ * @param url_dst new url to resource if the operation succeeded
+ * @return >=0 on success or negative on error.
+ */
+int avio_move(const char *url_src, const char *url_dst);
+
+/**
+ * Delete a resource.
+ *
+ * @param url resource to be deleted.
+ * @return >=0 on success or negative on error.
+ */
+int avio_delete(const char *url);
+
 /**
  * Open directory for reading.
  *

libavformat/url.h

@@ -90,6 +90,8 @@ typedef struct URLProtocol {
     int (*url_open_dir)(URLContext *h);
     int (*url_read_dir)(URLContext *h, AVIODirEntry **next);
     int (*url_close_dir)(URLContext *h);
+    int (*url_delete)(URLContext *h);
+    int (*url_move)(URLContext *h_src, URLContext *h_dst);
 } URLProtocol;
 
 /**

libavformat/version.h

@@ -30,7 +30,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVFORMAT_VERSION_MAJOR 56
-#define LIBAVFORMAT_VERSION_MINOR  37
+#define LIBAVFORMAT_VERSION_MINOR  38
 #define LIBAVFORMAT_VERSION_MICRO 100
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \