ffmpeg_next/codec/
codec.rs

1use std::ffi::CStr;
2use std::str::from_utf8_unchecked;
3
4use super::{Audio, Capabilities, Id, Profile, Video};
5use ffi::*;
6use {media, Error};
7
8#[derive(PartialEq, Eq, Copy, Clone)]
9pub struct Codec {
10    ptr: *const AVCodec,
11}
12
13unsafe impl Send for Codec {}
14unsafe impl Sync for Codec {}
15
16impl Codec {
17    pub unsafe fn wrap(ptr: *const AVCodec) -> Self {
18        Codec { ptr }
19    }
20
21    pub unsafe fn as_ptr(&self) -> *const AVCodec {
22        self.ptr as *const _
23    }
24}
25
26impl Codec {
27    pub fn is_encoder(&self) -> bool {
28        unsafe { av_codec_is_encoder(self.as_ptr()) != 0 }
29    }
30
31    pub fn is_decoder(&self) -> bool {
32        unsafe { av_codec_is_decoder(self.as_ptr()) != 0 }
33    }
34
35    pub fn name(&self) -> &str {
36        unsafe { from_utf8_unchecked(CStr::from_ptr((*self.as_ptr()).name).to_bytes()) }
37    }
38
39    pub fn description(&self) -> &str {
40        unsafe {
41            let long_name = (*self.as_ptr()).long_name;
42            if long_name.is_null() {
43                ""
44            } else {
45                from_utf8_unchecked(CStr::from_ptr(long_name).to_bytes())
46            }
47        }
48    }
49
50    pub fn medium(&self) -> media::Type {
51        unsafe { media::Type::from((*self.as_ptr()).type_) }
52    }
53
54    pub fn id(&self) -> Id {
55        unsafe { Id::from((*self.as_ptr()).id) }
56    }
57
58    pub fn is_video(&self) -> bool {
59        self.medium() == media::Type::Video
60    }
61
62    pub fn video(self) -> Result<Video, Error> {
63        unsafe {
64            if self.medium() == media::Type::Video {
65                Ok(Video::new(self))
66            } else {
67                Err(Error::InvalidData)
68            }
69        }
70    }
71
72    pub fn is_audio(&self) -> bool {
73        self.medium() == media::Type::Audio
74    }
75
76    pub fn audio(self) -> Result<Audio, Error> {
77        unsafe {
78            if self.medium() == media::Type::Audio {
79                Ok(Audio::new(self))
80            } else {
81                Err(Error::InvalidData)
82            }
83        }
84    }
85
86    pub fn max_lowres(&self) -> i32 {
87        unsafe { (*self.as_ptr()).max_lowres.into() }
88    }
89
90    pub fn capabilities(&self) -> Capabilities {
91        unsafe { Capabilities::from_bits_truncate((*self.as_ptr()).capabilities as u32) }
92    }
93
94    pub fn profiles(&self) -> Option<ProfileIter> {
95        unsafe {
96            if (*self.as_ptr()).profiles.is_null() {
97                None
98            } else {
99                Some(ProfileIter::new(self.id(), (*self.as_ptr()).profiles))
100            }
101        }
102    }
103}
104
105pub struct ProfileIter {
106    id: Id,
107    ptr: *const AVProfile,
108}
109
110impl ProfileIter {
111    pub fn new(id: Id, ptr: *const AVProfile) -> Self {
112        ProfileIter { id, ptr }
113    }
114}
115
116impl Iterator for ProfileIter {
117    type Item = Profile;
118
119    fn next(&mut self) -> Option<<Self as Iterator>::Item> {
120        unsafe {
121            if (*self.ptr).profile == FF_PROFILE_UNKNOWN {
122                return None;
123            }
124
125            let profile = Profile::from((self.id, (*self.ptr).profile));
126            self.ptr = self.ptr.offset(1);
127
128            Some(profile)
129        }
130    }
131}
ffmpeg_next/codec/codec.rs

ffmpeg_next/codec/
codec.rs
