This is a SDWebImage coder plugin to add AV1 Image File Format (AVIF) support. Which is built based on the open-sourced libavif codec.
This AVIF coder plugin currently support AVIF still image decoding. Including alpha channel, as well as 10bit/12bit HDR images.
The AVIF encoding is also supported now. Which always encode as 8-bit depth images.
AVIF image spec is still in evolve. And the current upstream AVIF codec is a simple implementation. The encoding time may be long for large images.
Since we rely on the external codec libavif. We may periodically update the dependency and bump version. Make sure you're using the latest version as possible as you can :)
libavif is a still image codec. But AVIF is based on the AV1 Video standard. So it need a AV1 codec for support. This relationship is just like HEIF(image) and HEVC(video) codec.
By default, libavif is built with aom codec support. aom is the first AV1 codec during the standard draft implementation.
dav1d is the new and next generation AV1 codec, focused on speed and correctness.
From v0.3.0, libavif can built with dav1d. For CocoaPods user, you can simply use the subspec for this. Carthage for optional dav1d codec is not supported currently.
- iOS 8
- macOS 10.10
- tvOS 9.0
- watchOS 2.0
SDWebImageAVIFCoder is available through CocoaPods. To install it, simply add the following line to your Podfile:
pod 'SDWebImageAVIFCoder'Note: From version 0.4.0, if you want to use dav1d instead aom for libavif which we dependent on, control the subspec of libavif instead:
pod 'SDWebImageAVIFCoder'
pod 'libavif/libdav1d'Note: From version 0.2.0, the dependency libavif and libaom use the portable C implementation to works on Apple platforms. If you need the pre-built library with SIMD/AVX and assembly optimization, try the 0.1.0 version.
SDWebImageAVIFCoder is available through Carthage.
github "SDWebImage/SDWebImageAVIFCoder"
To use AVIF coder, you should firstly add the SDImageAVIFCoder.sharedCoder to the coders manager. Then you can call the View Category method to start load AVIF images.
- Objective-C
SDImageAVIFCoder *AVIFCoder = SDImageAVIFCoder.sharedCoder;
[[SDImageCodersManager sharedManager] addCoder:AVIFCoder];
UIImageView *imageView;
[imageView sd_setImageWithURL:url];- Swift
let AVIFCoder = SDImageAVIFCoder.shared
SDImageCodersManager.shared.addCoder(AVIFCoder)
let imageView: UIImageView
imageView.sd_setImage(with: url)
The images are from AV1 Still Image File Format Specification Test Files.
AVIF is a new image format, which lack of related toolchains like Browser or Desktop Viewer support.
You can try AVIFQuickLook QuickLook plugin on macOS to view it in Finder.
You can also try using avif.js to view it online by using Chrome's AV1 codec.
DreamPiggy, lizhuoli1126@126.com
SDWebImageAVIFCoder is available under the MIT license. See the LICENSE file for more info.