* @return count of autodetected devices, negative on error.
* @note device argument takes precedence over device_name when both are set.
*/
-int avdevice_list_input_sources(struct AVInputFormat *device, const char *device_name,
+int avdevice_list_input_sources(const AVInputFormat *device, const char *device_name,
AVDictionary *device_options, AVDeviceInfoList **device_list);
-int avdevice_list_output_sinks(struct AVOutputFormat *device, const char *device_name,
+int avdevice_list_output_sinks(const AVOutputFormat *device, const char *device_name,
AVDictionary *device_options, AVDeviceInfoList **device_list);
/**