avformat: Add functions for doing global network initialization

Signed-off-by: Martin Storsjö <martin@martin.st>

doc/APIchanges

@@ -13,6 +13,9 @@ libavutil:   2011-04-18
 
 API changes, most recent first:
 
+2011-11-xx - xxxxxxx - lavf 53.13.0
+  Add avformat_network_init()/avformat_network_uninit()
+
 2011-xx-xx - xxxxxxx - lavc 53.15.0
   Remove avcodec_parse_frame.
   Deprecate AVCodecContext.parse_only and CODEC_CAP_PARSE_ONLY.

libavformat/avformat.h

@@ -1743,4 +1743,19 @@ int avformat_query_codec(AVOutputFormat *ofmt, enum CodecID codec_id, int std_co
  */
 const AVClass *avformat_get_class(void);
 
+/**
+ * Do global initialization of network components. This is optional,
+ * but recommended, since it avoids the overhead of implicitly
+ * doing the setup for each session.
+ *
+ * Since the next major version bump, calling this function will become
+ * mandatory if using network protocols.
+ */
+int avformat_network_init(void);
+
+/**
+ * Undo the initialization done by avformat_network_init.
+ */
+int avformat_network_deinit(void);
+
 #endif /* AVFORMAT_AVFORMAT_H */

libavformat/utils.c

@@ -3964,3 +3964,23 @@ int avformat_query_codec(AVOutputFormat *ofmt, enum CodecID codec_id, int std_co
     }
     return AVERROR_PATCHWELCOME;
 }
+
+int avformat_network_init(void)
+{
+#if CONFIG_NETWORK
+    int ret;
+    if ((ret = ff_network_init()) < 0)
+        return ret;
+    ff_tls_init();
+#endif
+    return 0;
+}
+
+int avformat_network_deinit(void)
+{
+#if CONFIG_NETWORK
+    ff_network_close();
+    ff_tls_deinit();
+#endif
+    return 0;
+}

libavformat/version.h

@@ -24,7 +24,7 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVFORMAT_VERSION_MAJOR 53
-#define LIBAVFORMAT_VERSION_MINOR 12
+#define LIBAVFORMAT_VERSION_MINOR 13
 #define LIBAVFORMAT_VERSION_MICRO  0
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \