ffmpeg_next/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) = self.codec() {
58            self.open_as(codec).and_then(|o| o.video())
59        } else if let Some(codec) = super::find(self.id()) {
60            self.open_as(codec).and_then(|o| o.video())
61        } else {
62            Err(Error::DecoderNotFound)
63        }
64    }
65
66    pub fn audio(self) -> Result<Audio, Error> {
67        if let Some(codec) = self.codec() {
68            self.open_as(codec).and_then(|o| o.audio())
69        } else if let Some(codec) = super::find(self.id()) {
70            self.open_as(codec).and_then(|o| o.audio())
71        } else {
72            Err(Error::DecoderNotFound)
73        }
74    }
75
76    pub fn subtitle(self) -> Result<Subtitle, Error> {
77        if let Some(codec) = super::find(self.id()) {
78            self.open_as(codec).and_then(|o| o.subtitle())
79        } else {
80            Err(Error::DecoderNotFound)
81        }
82    }
83
84    pub fn conceal(&mut self, value: Conceal) {
85        unsafe {
86            (*self.as_mut_ptr()).error_concealment = value.bits();
87        }
88    }
89
90    pub fn check(&mut self, value: Check) {
91        unsafe {
92            (*self.as_mut_ptr()).err_recognition = value.bits();
93        }
94    }
95
96    pub fn skip_loop_filter(&mut self, value: Discard) {
97        unsafe {
98            (*self.as_mut_ptr()).skip_loop_filter = value.into();
99        }
100    }
101
102    pub fn skip_idct(&mut self, value: Discard) {
103        unsafe {
104            (*self.as_mut_ptr()).skip_idct = value.into();
105        }
106    }
107
108    pub fn skip_frame(&mut self, value: Discard) {
109        unsafe {
110            (*self.as_mut_ptr()).skip_frame = value.into();
111        }
112    }
113
114    pub fn packet_time_base(&self) -> Rational {
115        unsafe { Rational::from((*self.as_ptr()).pkt_timebase) }
116    }
117
118    pub fn set_packet_time_base<R: Into<Rational>>(&mut self, value: R) {
119        unsafe {
120            (*self.as_mut_ptr()).pkt_timebase = value.into().into();
121        }
122    }
123}
124
125impl Deref for Decoder {
126    type Target = Context;
127
128    fn deref(&self) -> &<Self as Deref>::Target {
129        &self.0
130    }
131}
132
133impl DerefMut for Decoder {
134    fn deref_mut(&mut self) -> &mut <Self as Deref>::Target {
135        &mut self.0
136    }
137}
138
139impl AsRef<Context> for Decoder {
140    fn as_ref(&self) -> &Context {
141        self
142    }
143}
144
145impl AsMut<Context> for Decoder {
146    fn as_mut(&mut self) -> &mut Context {
147        &mut self.0
148    }
149}
ffmpeg_next/codec/decoder/decoder.rs

ffmpeg_next/codec/decoder/
decoder.rs
