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use std::ffi::CStr; use std::str::from_utf8_unchecked; use super::{Audio, Capabilities, Id, Profile, Video}; use ffi::*; use {media, Error}; #[derive(PartialEq, Eq, Copy, Clone)] pub struct Codec { ptr: *mut AVCodec, } unsafe impl Send for Codec {} unsafe impl Sync for Codec {} impl Codec { pub unsafe fn wrap(ptr: *mut AVCodec) -> Self { Codec { ptr: ptr } } pub unsafe fn as_ptr(&self) -> *const AVCodec { self.ptr as *const _ } pub unsafe fn as_mut_ptr(&mut self) -> *mut AVCodec { self.ptr } } impl Codec { pub fn is_encoder(&self) -> bool { unsafe { av_codec_is_encoder(self.as_ptr()) != 0 } } pub fn is_decoder(&self) -> bool { unsafe { av_codec_is_decoder(self.as_ptr()) != 0 } } pub fn name(&self) -> &str { unsafe { from_utf8_unchecked(CStr::from_ptr((*self.as_ptr()).name).to_bytes()) } } pub fn description(&self) -> &str { unsafe { from_utf8_unchecked(CStr::from_ptr((*self.as_ptr()).long_name).to_bytes()) } } pub fn medium(&self) -> media::Type { unsafe { media::Type::from((*self.as_ptr()).type_) } } pub fn id(&self) -> Id { unsafe { Id::from((*self.as_ptr()).id) } } pub fn is_video(&self) -> bool { self.medium() == media::Type::Video } pub fn video(self) -> Result<Video, Error> { unsafe { if self.medium() == media::Type::Video { Ok(Video::new(self)) } else { Err(Error::InvalidData) } } } pub fn is_audio(&self) -> bool { self.medium() == media::Type::Audio } pub fn audio(self) -> Result<Audio, Error> { unsafe { if self.medium() == media::Type::Audio { Ok(Audio::new(self)) } else { Err(Error::InvalidData) } } } pub fn max_lowres(&self) -> i32 { unsafe { av_codec_get_max_lowres(self.as_ptr()) } } pub fn capabilities(&self) -> Capabilities { unsafe { Capabilities::from_bits_truncate((*self.as_ptr()).capabilities as u32) } } pub fn profiles(&self) -> Option<ProfileIter> { unsafe { if (*self.as_ptr()).profiles.is_null() { None } else { Some(ProfileIter::new(self.id(), (*self.as_ptr()).profiles)) } } } } pub struct ProfileIter { id: Id, ptr: *const AVProfile, } impl ProfileIter { pub fn new(id: Id, ptr: *const AVProfile) -> Self { ProfileIter { id: id, ptr: ptr } } } impl Iterator for ProfileIter { type Item = Profile; fn next(&mut self) -> Option<<Self as Iterator>::Item> { unsafe { if (*self.ptr).profile == FF_PROFILE_UNKNOWN { return None; } let profile = Profile::from((self.id, (*self.ptr).profile)); self.ptr = self.ptr.offset(1); Some(profile) } } }