ffmpeg_rs/codec/decoder/
decoder.rs

1use std::ops::{Deref, DerefMut};
2use std::ptr;
3
4use super::{Audio, Check, Conceal, Opened, Subtitle, Video};
5use codec::{traits, Context};
6use ffi::*;
7use {Dictionary, Discard, Error, Rational};
8
9pub struct Decoder(pub Context);
10
11impl Decoder {
12    pub fn open(mut self) -> Result<Opened, Error> {
13        unsafe {
14            match avcodec_open2(self.as_mut_ptr(), ptr::null(), ptr::null_mut()) {
15                0 => Ok(Opened(self)),
16                e => Err(Error::from(e)),
17            }
18        }
19    }
20
21    pub fn open_as<D: traits::Decoder>(mut self, codec: D) -> Result<Opened, Error> {
22        unsafe {
23            if let Some(codec) = codec.decoder() {
24                match avcodec_open2(self.as_mut_ptr(), codec.as_ptr(), ptr::null_mut()) {
25                    0 => Ok(Opened(self)),
26                    e => Err(Error::from(e)),
27                }
28            } else {
29                Err(Error::DecoderNotFound)
30            }
31        }
32    }
33
34    pub fn open_as_with<D: traits::Decoder>(
35        mut self,
36        codec: D,
37        options: Dictionary,
38    ) -> Result<Opened, Error> {
39        unsafe {
40            if let Some(codec) = codec.decoder() {
41                let mut opts = options.disown();
42                let res = avcodec_open2(self.as_mut_ptr(), codec.as_ptr(), &mut opts);
43
44                Dictionary::own(opts);
45
46                match res {
47                    0 => Ok(Opened(self)),
48                    e => Err(Error::from(e)),
49                }
50            } else {
51                Err(Error::DecoderNotFound)
52            }
53        }
54    }
55
56    pub fn video(self) -> Result<Video, Error> {
57        if let Some(codec) = super::find(self.id()) {
58            self.open_as(codec).and_then(|o| o.video())
59        } else {
60            Err(Error::DecoderNotFound)
61        }
62    }
63
64    pub fn audio(self) -> Result<Audio, Error> {
65        if let Some(codec) = super::find(self.id()) {
66            self.open_as(codec).and_then(|o| o.audio())
67        } else {
68            Err(Error::DecoderNotFound)
69        }
70    }
71
72    pub fn subtitle(self) -> Result<Subtitle, Error> {
73        if let Some(codec) = super::find(self.id()) {
74            self.open_as(codec).and_then(|o| o.subtitle())
75        } else {
76            Err(Error::DecoderNotFound)
77        }
78    }
79
80    pub fn conceal(&mut self, value: Conceal) {
81        unsafe {
82            (*self.as_mut_ptr()).error_concealment = value.bits();
83        }
84    }
85
86    pub fn check(&mut self, value: Check) {
87        unsafe {
88            (*self.as_mut_ptr()).err_recognition = value.bits();
89        }
90    }
91
92    pub fn skip_loop_filter(&mut self, value: Discard) {
93        unsafe {
94            (*self.as_mut_ptr()).skip_loop_filter = value.into();
95        }
96    }
97
98    pub fn skip_idct(&mut self, value: Discard) {
99        unsafe {
100            (*self.as_mut_ptr()).skip_idct = value.into();
101        }
102    }
103
104    pub fn skip_frame(&mut self, value: Discard) {
105        unsafe {
106            (*self.as_mut_ptr()).skip_frame = value.into();
107        }
108    }
109
110    pub fn time_base(&self) -> Rational {
111        unsafe { Rational::from((*self.as_ptr()).time_base) }
112    }
113}
114
115impl Deref for Decoder {
116    type Target = Context;
117
118    fn deref(&self) -> &<Self as Deref>::Target {
119        &self.0
120    }
121}
122
123impl DerefMut for Decoder {
124    fn deref_mut(&mut self) -> &mut <Self as Deref>::Target {
125        &mut self.0
126    }
127}
128
129impl AsRef<Context> for Decoder {
130    fn as_ref(&self) -> &Context {
131        self
132    }
133}
134
135impl AsMut<Context> for Decoder {
136    fn as_mut(&mut self) -> &mut Context {
137        &mut self.0
138    }
139}
ffmpeg_rs/codec/decoder/decoder.rs

ffmpeg_rs/codec/decoder/
decoder.rs
