RsFileSink writes buffers to a file

src/rsfilesink.rs

@@ -76,7 +76,16 @@ impl Sink for FileSink {
         match self.location {
             None => return false,
             Some(ref location) => {
-                return true;
+                match File::create(location.as_path()) {
+                    Ok(file) => {
+                        self.file = Some(file);
+                        return true;
+                    },
+                    Err(err) => {
+                        println_err!("Could not open file for writing '{}': {}", location.to_str().unwrap_or("Non-UTF8 path"), err.to_string());
+                        return false;
+                    }
+                }
             },
         }
     }
@@ -88,8 +97,20 @@ impl Sink for FileSink {
         true
     }
 
-    fn render(&mut self) -> Result<usize, GstFlowReturn> {
-        println!("Got a buffer!");
-        Err(GstFlowReturn::Ok)
+    fn render(&mut self, data: &mut [u8]) -> GstFlowReturn {
+        match self.file {
+            None => return GstFlowReturn::Error,
+            Some(ref mut f) => {
+                match f.write_all(data) {
+                    Ok(_) => {
+                        return GstFlowReturn::Ok
+                    },
+                    Err(err) => {
+                        println_err!("Failed to write: {}", err);
+                        return GstFlowReturn::Error
+                    },
+                }
+            },
+        }
     }
 }

src/rssink.c

@@ -16,7 +16,7 @@ static GHashTable *sinks;
 
 /* Declarations for Rust code */
 extern gboolean sinks_register (void *plugin);
-extern GstFlowReturn sink_render (void * filesink);
+extern GstFlowReturn sink_render (void * filesink, void * data, size_t data_len);
 extern gboolean sink_set_uri (void * filesink, const char *uri);
 extern char * sink_get_uri (void * filesink);
 extern gboolean sink_start (void * filesink);
@@ -132,9 +132,12 @@ static GstFlowReturn
 gst_rs_sink_render (GstBaseSink * basesink, GstBuffer * buffer)
 {
   GstRsSink *sink = GST_RS_SINK (basesink);
+  GstMapInfo map;
   GstFlowReturn ret;
 
-  ret = sink_render (sink->instance);
+  gst_buffer_map (buffer, &map, GST_MAP_READ);
+  ret = sink_render (sink->instance, map.data, map.size);
+  gst_buffer_unmap (buffer, &map);
 
   return ret;
 }

src/rssink.rs

@@ -1,5 +1,6 @@
 use libc::{c_char};
 use std::ffi::{CStr, CString};
+use std::slice;
 use std::ptr;
 
 use utils::*;
@@ -9,7 +10,7 @@ pub trait Sink {
     fn get_uri(&self) -> Option<String>;
     fn start(&mut self) -> bool;
     fn stop(&mut self) -> bool;
-    fn render(&mut self) -> Result<usize, GstFlowReturn>;
+    fn render(&mut self, data: &mut [u8]) -> GstFlowReturn;
 }
 
 #[no_mangle]
@@ -37,15 +38,11 @@ pub extern "C" fn sink_get_uri(ptr: *mut Box<Sink>) -> *mut c_char {
 }
 
 #[no_mangle]
-pub extern "C" fn sink_render(ptr: *mut Box<Sink>) -> GstFlowReturn {
+pub extern "C" fn sink_render(ptr: *mut Box<Sink>, data_ptr: *mut u8, data_len: usize) -> GstFlowReturn {
     let source: &mut Box<Sink> = unsafe { &mut *ptr };
 
-    match source.render() {
-        Ok(data) => {
-            GstFlowReturn::Ok
-        },
-        Err(ret) => ret,
-    }
+    let mut data = unsafe { slice::from_raw_parts_mut(data_ptr, data_len) };
+    source.render(data)
 }
 
 #[no_mangle]