From 056293a24427c19ba2970512398cccbddcce051e Mon Sep 17 00:00:00 2001
From: lummax <luogpg@googlemail.com>
Date: Wed, 9 Sep 2015 19:19:45 +0200
Subject: [PATCH] filter/graph: add `dump()` method

---
 src/filter/graph.rs | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/filter/graph.rs b/src/filter/graph.rs
index 8005843..cf754c9 100644
--- a/src/filter/graph.rs
+++ b/src/filter/graph.rs
@@ -1,5 +1,6 @@
 use std::ptr;
-use std::ffi::CString;
+use std::ffi::{CString, CStr};
+use std::str::from_utf8_unchecked;
 
 use ffi::*;
 use libc::c_int;
@@ -76,6 +77,18 @@ impl Graph {
 		}
 	}
 
+	pub fn dump(&self) -> String {
+		unsafe {
+			let ptr    = avfilter_graph_dump(self.as_ptr(), ptr::null());
+			let cstr   = from_utf8_unchecked(CStr::from_ptr((ptr)).to_bytes());
+			let string = cstr.to_owned();
+
+			av_free(ptr as *mut _);
+
+			string
+		}
+	}
+
 	pub fn input(&mut self, name: &str, pad: usize) -> Result<Parser, Error> {
 		Parser::new(self).input(name, pad)
 	}