@@ -13,6 +13,9 @@ libavutil:   2009-03-08

 API changes, most recent first:

+2011-02-XX - XXXXXXX - lavf 52.XX.0 - avio.h

+  Add flag for non-blocking protocols: URL_FLAG_NONBLOCK

+

 2011-02-04 - f124b08 - lavf 52.96.0 - avformat_free_context()

   Add avformat_free_context() in avformat.h.

@@ -63,9 +63,32 @@ typedef struct URLPollEntry {

     int revents;

 } URLPollEntry;

-#define URL_RDONLY 0

-#define URL_WRONLY 1

-#define URL_RDWR   2

+/**

+ * @defgroup open_modes URL open modes

+ * The flags argument to url_open and cosins must be one of the following

+ * constants, optionally ORed with other flags.

+ * @{

+ */

+#define URL_RDONLY 0  /**< read-only */

+#define URL_WRONLY 1  /**< write-only */

+#define URL_RDWR   2  /**< read-write */

+/**

+ * @}

+ */

+

+/**

+ * Use non-blocking mode.

+ * If this flag is set, operations on the context will return

+ * AVERROR(EAGAIN) if they can not be performed immediately.

+ * If this flag is not set, operations on the context will never return

+ * AVERROR(EAGAIN).

+ * Note that this flag does not affect the opening/connecting of the

+ * context. Connecting a protocol will always block if necessary (e.g. on

+ * network protocols) but never hang (e.g. on busy devices).

+ * Warning: non-blocking protocols is work-in-progress; this flag may be

+ * silently ignored.

+ */

+#define URL_FLAG_NONBLOCK 4

 typedef int URLInterruptCB(void);