@@ -994,6 +994,17 @@ typedef struct AVFormatContext {

      */

     int error_recognition;

+    /**

+     * Custom interrupt callbacks for the I/O layer.

+     *

+     * decoding: set by the user before avformat_open_input().

+     * encoding: set by the user before avformat_write_header()

+     * (mainly useful for AVFMT_NOFILE formats). The callback

+     * should also be passed to avio_open2() if it's used to

+     * open the file.

+     */

+    AVIOInterruptCB interrupt_callback;

+

     /*****************************************************************

      * All fields below this line are not part of the public API. They

      * may not be used outside of libavformat and can be changed and

@@ -36,6 +36,22 @@

 #define AVIO_SEEKABLE_NORMAL 0x0001 /**< Seeking works like for a local file */

 /**

+ * Callback for checking whether to abort blocking functions.

+ * AVERROR_EXIT is returned in this case by the interrupted

+ * function. During blocking operations, callback is called with

+ * opaque as parameter. If the callback returns 1, the

+ * blocking operation will be aborted.

+ *

+ * No members can be added to this struct without a major bump, if

+ * new elements have been added after this struct in AVFormatContext

+ * or AVIOContext.

+ */

+typedef struct {

+    int (*callback)(void*);

+    void *opaque;

+} AVIOInterruptCB;

+

+/**

  * Bytestream IO Context.

  * New fields can be added to the end with minor version bumps.

  * Removal, reordering and changes to existing fields require a major

@@ -109,6 +125,7 @@ typedef struct URLContext {

     void *priv_data;

     char *filename; /**< specified URL */

     int is_connected;

+    AVIOInterruptCB interrupt_callback;

 } URLContext;

 #define URL_PROTOCOL_FLAG_NESTED_SCHEME 1 /*< The protocol name can be the first part of a nested protocol scheme */

@@ -42,6 +42,7 @@ typedef struct URLContext {

     int max_packet_size;        /**< if non zero, the stream is packetized with this max packet size */

     int is_streamed;            /**< true if streamed (no seek possible), default = false */

     int is_connected;

+    AVIOInterruptCB interrupt_callback;

 } URLContext;

 typedef struct URLProtocol {