Use Default Trait

The default values must be reviewed

example/src/main.rs

@@ -18,11 +18,7 @@ fn main() {
       }
 
       //TODO valores por defecto
-      let NDI_find_create_desc = NDIlib_find_create_t {
-          show_local_sources: false,
-          p_groups: ptr::null(),
-          p_extra_ips: ptr::null()
-      };
+      let NDI_find_create_desc: NDIlib_find_create_t = Default::default();
       let pNDI_find = NDIlib_find_create_v2(&NDI_find_create_desc);
       if pNDI_find.is_null() {
           println!("Cannot run NDI: NDIlib_find_create_v2 error.");
@@ -54,10 +50,8 @@ fn main() {
       let p_ndi_name = CString::new("Galicaster NDI Receiver").unwrap();
       let NDI_recv_create_desc = NDIlib_recv_create_v3_t {
           source_to_connect_to: *p_sources,
-          allow_video_fields: true,
-          bandwidth: NDIlib_recv_bandwidth_e_NDIlib_recv_bandwidth_highest,
-          color_format: NDIlib_recv_color_format_e_NDIlib_recv_color_format_BGRX_BGRA,
-          p_ndi_name: p_ndi_name.as_ptr(), //ptr::null(),
+          p_ndi_name: p_ndi_name.as_ptr(), 
+          ..Default::default()
       };
 
 
@@ -71,10 +65,7 @@ fn main() {
       NDIlib_find_destroy(pNDI_find);
 
       // We are now going to mark this source as being on program output for tally purposes (but not on preview)
-      let tally_state = NDIlib_tally_t {
-          on_program: true,
-          on_preview: true,
-      };
+      let tally_state: NDIlib_tally_t = Default::default();
       NDIlib_recv_set_tally(pNDI_recv, &tally_state);
 
 
@@ -92,39 +83,11 @@ fn main() {
 
       loop {
 
-          let video_frame = NDIlib_video_frame_v2_t {
-              xres: 0,
-              yres: 0,
-              FourCC: 0,
-              frame_rate_N: 0,
-              frame_rate_D: 0,
-              picture_aspect_ratio: 0.0,
-              frame_format_type: 0,
-              timecode: 0,
-              p_data: ptr::null(),
-              line_stride_in_bytes: 0,
-              p_metadata: ptr::null(),
-              timestamp: 0,
-          };
+          let video_frame: NDIlib_video_frame_v2_t = Default::default();
+          let audio_frame: NDIlib_audio_frame_v2_t = Default::default();
+          let metadata_frame: NDIlib_metadata_frame_t = Default::default();
 
 
-          let audio_frame = NDIlib_audio_frame_v2_t {
-              sample_rate: 0,
-              no_channels: 0,
-              no_samples: 0,
-              timecode: 0,
-              p_data: ptr::null(),
-              channel_stride_in_bytes: 0,
-              p_metadata: ptr::null(),
-              timestamp: 0,
-          };
-
-          let metadata_frame = NDIlib_metadata_frame_t {
-              length: 0,
-              timecode: 0,
-              p_data: ptr::null(),
-          };
-
           let frame_type = NDIlib_recv_capture_v2(pNDI_recv, &video_frame, &audio_frame, &metadata_frame, 1000);
 
 

example/src/ndilib.rs

@@ -1,5 +1,7 @@
 #![allow(non_camel_case_types, non_upper_case_globals)]
 
+use std::ptr;
+
 #[link(name = "ndi")]
 extern "C" {
     pub fn NDIlib_initialize() -> bool;
@@ -43,6 +45,17 @@ pub struct NDIlib_find_create_t {
     pub p_extra_ips: *const ::std::os::raw::c_char,
 }
 
+impl Default for NDIlib_find_create_t {
+    fn default() -> Self {
+        NDIlib_find_create_t { 
+            show_local_sources: true,
+            p_groups: ptr::null(),
+            p_extra_ips: ptr::null()
+        }
+    }
+}
+
+
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]
 pub struct NDIlib_source_t {
@@ -50,6 +63,15 @@ pub struct NDIlib_source_t {
     pub p_ip_address: *const ::std::os::raw::c_char,
 }
 
+impl Default for NDIlib_source_t {
+    fn default() -> Self { 
+        NDIlib_source_t { 
+            p_ndi_name: ptr::null(),
+            p_ip_address: ptr::null()
+        }
+    }
+}
+
 
 //TODO review enum
 pub type NDIlib_frame_type_e = i32;
@@ -89,6 +111,18 @@ pub struct NDIlib_recv_create_v3_t {
     pub p_ndi_name: *const ::std::os::raw::c_char,
 }
 
+impl Default for NDIlib_recv_create_v3_t {
+    fn default() -> Self { 
+        NDIlib_recv_create_v3_t {
+            source_to_connect_to: Default::default(),
+            allow_video_fields: true,
+            bandwidth: NDIlib_recv_bandwidth_e_NDIlib_recv_bandwidth_highest,
+            color_format: NDIlib_recv_color_format_e_NDIlib_recv_color_format_UYVY_BGRA,
+            p_ndi_name: ptr::null()
+        }
+    }
+}
+
 pub type NDIlib_recv_instance_t = *mut ::std::os::raw::c_void;
 
 
@@ -99,14 +133,36 @@ pub struct NDIlib_tally_t {
     pub on_preview: bool,
 }
 
+impl Default for NDIlib_tally_t {
+    fn default() -> Self {
+        NDIlib_tally_t {
+            on_program: false,
+            on_preview: false
+        }
+    }
+}
+
 #[repr(C)]
 #[derive(Debug,Copy,Clone)]
 pub struct NDIlib_metadata_frame_t {
     pub length: ::std::os::raw::c_int,
-    pub timecode: i64,
+    pub timecode: i64, 
     pub p_data: *const ::std::os::raw::c_char,
 }
 
+
+impl Default for NDIlib_metadata_frame_t {
+    fn default() -> Self {
+        NDIlib_metadata_frame_t {
+            length: 0,
+            timecode: 0, //NDIlib_send_timecode_synthesize,
+            p_data: ptr::null()
+        }
+    }
+}
+
+
+
 #[repr(C)]
 #[derive(Debug,Copy,Clone)]
 pub struct NDIlib_video_frame_v2_t {
@@ -124,6 +180,25 @@ pub struct NDIlib_video_frame_v2_t {
     pub timestamp: i64,
 }
 
+impl Default for NDIlib_video_frame_v2_t {
+    fn default() -> Self {
+        NDIlib_video_frame_v2_t {
+            xres: 0,
+            yres: 0,
+            FourCC: 0,
+            frame_rate_N: 0,
+            frame_rate_D: 0,
+            picture_aspect_ratio: 0.0,
+            frame_format_type: 0,
+            timecode: 0,  //NDIlib_send_timecode_synthesize,
+            p_data: ptr::null(),
+            line_stride_in_bytes: 0,
+            p_metadata: ptr::null(),
+            timestamp: 0
+        }
+    }
+}
+
 
 #[repr(C)]
 #[derive(Debug,Copy,Clone)]
@@ -137,3 +212,18 @@ pub struct NDIlib_audio_frame_v2_t {
     pub p_metadata: *const ::std::os::raw::c_char,
     pub timestamp: i64,
 }
+
+impl Default for NDIlib_audio_frame_v2_t {
+    fn default() -> Self {
+        NDIlib_audio_frame_v2_t {
+            sample_rate: 48000,
+            no_channels: 2,
+            no_samples: 0,
+            timecode: 0, //NDIlib_send_timecode_synthesize,
+            p_data: ptr::null(),
+            channel_stride_in_bytes: 0,
+            p_metadata: ptr::null(),
+            timestamp: 0
+        }
+    }
+}