ffmpeg_next_crossfix/util/dictionary/
mutable.rs

1use std::ffi::CString;
2use std::fmt;
3use std::marker::PhantomData;
4use std::ops::Deref;
5
6use super::immutable;
7use ffi::*;
8
9pub struct Ref<'a> {
10    ptr: *mut AVDictionary,
11    imm: immutable::Ref<'a>,
12
13    _marker: PhantomData<&'a ()>,
14}
15
16impl<'a> Ref<'a> {
17    pub unsafe fn wrap(ptr: *mut AVDictionary) -> Self {
18        Ref {
19            ptr,
20            imm: immutable::Ref::wrap(ptr),
21            _marker: PhantomData,
22        }
23    }
24
25    pub unsafe fn as_mut_ptr(&self) -> *mut AVDictionary {
26        self.ptr
27    }
28}
29
30impl<'a> Ref<'a> {
31    pub fn set(&mut self, key: &str, value: &str) {
32        unsafe {
33            let key = CString::new(key).unwrap();
34            let value = CString::new(value).unwrap();
35            let mut ptr = self.as_mut_ptr();
36
37            if av_dict_set(&mut ptr, key.as_ptr(), value.as_ptr(), 0) < 0 {
38                panic!("out of memory");
39            }
40
41            self.ptr = ptr;
42            self.imm = immutable::Ref::wrap(ptr);
43        }
44    }
45}
46
47impl<'a> Deref for Ref<'a> {
48    type Target = immutable::Ref<'a>;
49
50    fn deref(&self) -> &Self::Target {
51        &self.imm
52    }
53}
54
55impl<'a> fmt::Debug for Ref<'a> {
56    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
57        self.imm.fmt(fmt)
58    }
59}
ffmpeg_next_crossfix/util/dictionary/mutable.rs

ffmpeg_next_crossfix/util/dictionary/
mutable.rs
