Add parameter to specify storage location

Allows the client to specify if a media file should be stored on internal or external storage (if available).

Author: follesoe

protobuf_definitions/control.proto

@@ -50,10 +50,12 @@ message WatchdogCtrl {
 // Issue a command to start video recording.
 message RecordCtrl {
   RecordOn record_on = 1; // Message specifying which cameras to record.
+  StorageLocation storage_location = 2; // Storage location to use for the recordings.
 }
 
 // Issue a command to take a picture.
 message TakePictureCtrl {
+  StorageLocation storage_location = 1; // Storage location to use for the picture.
 }
 
 // Issue a command to start compass calibration.

protobuf_definitions/message_formats.proto

@@ -599,6 +599,15 @@ message RecordOn {
   bool multibeam = 3; // Record multibeam.
 }
 
+// Storage location.
+//
+// Used to specify which storage location to use for recording photos and videos.
+enum StorageLocation {
+  STORAGE_LOCATION_UNSPECIFIED = 0; // Unspecified.
+  STORAGE_LOCATION_INTERNAL = 1; // Internal storage of the drone.
+  STORAGE_LOCATION_REMOVABLE = 2; // Removable storage device.
+}
+
 // Storage space.
 message StorageSpace {
   int64 total_space = 1; // Total bytes of storage space (B).
@@ -814,7 +823,6 @@ enum StreamingProtocol {
   STREAMING_PROTOCOL_RTSP_MJPEG = 2; // RTSP streaming protocol using MJPEG codec.
 }
 
-
 // Camera parameters.
 message CameraParameters {
   int32 h264_bitrate = 1; // Bitrate of the h264 stream (bit/sec).