ffmpeg_the_third/format/stream/
stream_mut.rs

1use std::mem;
2use std::ops::Deref;
3
4use super::Stream;
5use crate::ffi::*;
6use crate::format::context::common::Context;
7use crate::AsPtr;
8use crate::{codec, Dictionary, Rational};
9
10pub struct StreamMut<'a> {
11    context: &'a mut Context,
12    index: usize,
13
14    immutable: Stream<'a>,
15}
16
17impl<'a> StreamMut<'a> {
18    pub unsafe fn wrap(context: &mut Context, index: usize) -> StreamMut<'_> {
19        StreamMut {
20            context: mem::transmute_copy(&context),
21            index,
22
23            immutable: Stream::wrap(mem::transmute_copy(&context), index),
24        }
25    }
26
27    pub unsafe fn as_mut_ptr(&mut self) -> *mut AVStream {
28        *(*self.context.as_mut_ptr()).streams.add(self.index)
29    }
30}
31
32impl<'a> StreamMut<'a> {
33    pub fn set_time_base<R: Into<Rational>>(&mut self, value: R) {
34        unsafe {
35            (*self.as_mut_ptr()).time_base = value.into().into();
36        }
37    }
38
39    pub fn set_rate<R: Into<Rational>>(&mut self, value: R) {
40        unsafe {
41            (*self.as_mut_ptr()).r_frame_rate = value.into().into();
42        }
43    }
44
45    pub fn set_avg_frame_rate<R: Into<Rational>>(&mut self, value: R) {
46        unsafe {
47            (*self.as_mut_ptr()).avg_frame_rate = value.into().into();
48        }
49    }
50
51    pub fn parameters_mut(&mut self) -> codec::ParametersMut<'_> {
52        unsafe {
53            codec::ParametersMut::from_raw((*self.as_mut_ptr()).codecpar)
54                .expect("codecpar is non-null")
55        }
56    }
57
58    pub fn set_parameters<P: AsPtr<AVCodecParameters>>(&mut self, parameters: P) {
59        unsafe {
60            avcodec_parameters_copy((*self.as_mut_ptr()).codecpar, parameters.as_ptr());
61        }
62    }
63
64    pub fn copy_parameters_from_context(&mut self, ctx: &codec::Context) {
65        unsafe {
66            avcodec_parameters_from_context((*self.as_mut_ptr()).codecpar, ctx.as_ptr());
67        }
68    }
69
70    pub fn set_metadata(&mut self, metadata: Dictionary) {
71        unsafe {
72            let metadata = metadata.disown();
73            (*self.as_mut_ptr()).metadata = metadata;
74        }
75    }
76}
77
78impl<'a> Deref for StreamMut<'a> {
79    type Target = Stream<'a>;
80
81    fn deref(&self) -> &Self::Target {
82        &self.immutable
83    }
84}
ffmpeg_the_third/format/stream/stream_mut.rs

ffmpeg_the_third/format/stream/
stream_mut.rs
