This is an incomplete/WIP Swift implementation of Action Message Format Encoding and Decoding. Originally built for use in a Swift RTMP implementation in the video broadcast space.
Making AMF parse into Swift Codable objects/structs is quite limiting, inside the confines of the Swift type system and how custom Codable Encoder/Decoders needs to be written to work. It is almost impossible not to loose information/order when encoding in and out of AMF.
A good example of Decoding working (for AMF0) is found in the testAMFObject() test inside the AMF0DecodingTests, which uses real AMF0 in an RTMP situation. Round trip tests demonstrate encoding too.
This implementation will get more battled/performance tested once deployed with an RTMP implementation.
Currently running at an OK >60% coverage
TODO:
Both
Refactor away side effecty lazy vars to bubble up throws a bit better
Remove some boilerplate with types not easily represented in AMF, but are in Swift
AMF0
Better tested reference decoding
Reference encoding implementation
XML Document Type
More unit tests in general
AMF3
Reference decoding
Reference encoding
Typed, Dynamic, Externalizable Objects (currently only Anonymous is supported)
XML Type
ByteArray Type
Vector Types
Dictionary Type
Sparse ECMA (to be parsed into a dictionary) of the Array Type
Keying by types other than strings
RTMP based tests
More tests
THANKS!
Massive thanks to @mattt for his Flight School Guide to Swift Codable, specifically his MessagePack implementation and DIY Codable Encoder / Decoder Kit both of which were invaluable in understanding how to write a custom Codable Encoder/Decoder and to the existing (but rather dated) CocoaAMF for getting my head around AMF (especially AMF3 - which is totally nutty - with it’s proprietary Unsigned29Int that itself is bit shifted all over the place).
Swift AMF Encoder/Decoder, using Codable.
This is an incomplete/WIP Swift implementation of Action Message Format Encoding and Decoding. Originally built for use in a Swift RTMP implementation in the video broadcast space.
Making AMF parse into Swift Codable objects/structs is quite limiting, inside the confines of the Swift type system and how custom Codable Encoder/Decoders needs to be written to work. It is almost impossible not to loose information/order when encoding in and out of AMF.
A good example of Decoding working (for AMF0) is found in the
testAMFObject()test inside theAMF0DecodingTests, which uses real AMF0 in an RTMP situation. Round trip tests demonstrate encoding too.This implementation will get more battled/performance tested once deployed with an RTMP implementation.
Currently running at an OK >60% coverage
TODO:
Both
lazy vars to bubble upthrowsa bit betterAMF0
AMF3
THANKS!
Massive thanks to @mattt for his Flight School Guide to Swift Codable, specifically his MessagePack implementation and DIY Codable Encoder / Decoder Kit both of which were invaluable in understanding how to write a custom Codable Encoder/Decoder and to the existing (but rather dated) CocoaAMF for getting my head around AMF (especially AMF3 - which is totally nutty - with it’s proprietary Unsigned29Int that itself is bit shifted all over the place).