ffmpeg_next/util/dictionary/
iter.rs

1use std::ffi::{CStr, CString};
2use std::marker::PhantomData;
3use std::ptr;
4use std::str::from_utf8_unchecked;
5
6use ffi::*;
7
8pub struct Iter<'a> {
9    ptr: *const AVDictionary,
10    cur: *mut AVDictionaryEntry,
11
12    _marker: PhantomData<&'a ()>,
13}
14
15impl<'a> Iter<'a> {
16    pub fn new(dictionary: *const AVDictionary) -> Self {
17        Iter {
18            ptr: dictionary,
19            cur: ptr::null_mut(),
20
21            _marker: PhantomData,
22        }
23    }
24}
25
26impl<'a> Iterator for Iter<'a> {
27    type Item = (&'a str, &'a str);
28
29    fn next(&mut self) -> Option<<Self as Iterator>::Item> {
30        unsafe {
31            let empty = CString::new("").unwrap();
32            let entry = av_dict_get(self.ptr, empty.as_ptr(), self.cur, AV_DICT_IGNORE_SUFFIX);
33
34            if !entry.is_null() {
35                let key = from_utf8_unchecked(CStr::from_ptr((*entry).key).to_bytes());
36                let val = from_utf8_unchecked(CStr::from_ptr((*entry).value).to_bytes());
37
38                self.cur = entry;
39
40                Some((key, val))
41            } else {
42                None
43            }
44        }
45    }
46}
ffmpeg_next/util/dictionary/iter.rs

ffmpeg_next/util/dictionary/
iter.rs
