lavd/avdevice: introduce helper functions for sink/sources listing

Signed-off-by: Lukasz Marek <lukasz.m.luki2@gmail.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/libavdevice/avdevice.h b/libavdevice/avdevice.h
index a39522819e..2d675b012d 100644
--- a/libavdevice/avdevice.h
+++ b/libavdevice/avdevice.h
@@ -484,4 +484,26 @@ int avdevice_list_devices(struct AVFormatContext *s, AVDeviceInfoList **device_l
  */
 void avdevice_free_list_devices(AVDeviceInfoList **device_list);
 
+/**
+ * List devices.
+ *
+ * Returns available device names and their parameters.
+ * These are convinient wrappers for avdevice_list_devices().
+ * Device context is allocated and deallocated internally.
+ *
+ * @param device           device format. May be NULL if device name is set.
+ * @param device_name      device name. May be NULL if device format is set.
+ * @param device_options   An AVDictionary filled with device-private options. May be NULL.
+ *                         The same options must be passed later to avformat_write_header() for output
+ *                         devices or avformat_open_input() for input devices, or at any other place
+ *                         that affects device-private options.
+ * @param[out] device_list list of autodetected devices
+ * @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,
+                                AVDictionary *device_options, AVDeviceInfoList **device_list);
+int avdevice_list_output_sinks(struct AVOutputFormat *device, const char *device_name,
+                               AVDictionary *device_options, AVDeviceInfoList **device_list);
+
 #endif /* AVDEVICE_AVDEVICE_H */