ffmpeg_next/util/dictionary/
mutable.rs

1use std::ffi::CString;
2use std::fmt;
3use std::marker::PhantomData;
4use std::ops::Deref;
5
6use super::immutable;
7use crate::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        unsafe {
19            Ref {
20                ptr,
21                imm: immutable::Ref::wrap(ptr),
22                _marker: PhantomData,
23            }
24        }
25    }
26
27    pub unsafe fn as_mut_ptr(&self) -> *mut AVDictionary {
28        self.ptr
29    }
30}
31
32impl<'a> Ref<'a> {
33    pub fn set(&mut self, key: &str, value: &str) {
34        unsafe {
35            let key = CString::new(key).unwrap();
36            let value = CString::new(value).unwrap();
37            let mut ptr = self.as_mut_ptr();
38
39            if av_dict_set(&mut ptr, key.as_ptr(), value.as_ptr(), 0) < 0 {
40                panic!("out of memory");
41            }
42
43            self.ptr = ptr;
44            self.imm = immutable::Ref::wrap(ptr);
45        }
46    }
47}
48
49impl<'a> Deref for Ref<'a> {
50    type Target = immutable::Ref<'a>;
51
52    fn deref(&self) -> &Self::Target {
53        &self.imm
54    }
55}
56
57impl<'a> fmt::Debug for Ref<'a> {
58    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
59        self.imm.fmt(fmt)
60    }
61}
ffmpeg_next/util/dictionary/mutable.rs

ffmpeg_next/util/dictionary/
mutable.rs
