mirror of
https://github.com/Laurent2916/Diffusers.jl.git
synced 2024-11-08 14:38:58 +00:00
100 lines
2.9 KiB
Julia
100 lines
2.9 KiB
Julia
using Flux
|
|
import Flux._show_children
|
|
import Flux._big_show
|
|
|
|
|
|
abstract type AbstractParallel end
|
|
|
|
_maybe_forward(layer::AbstractParallel, x::AbstractArray, ys::AbstractArray...) = layer(x, ys...)
|
|
_maybe_forward(layer::Parallel, x::AbstractArray, ys::AbstractArray...) = layer(x, ys...)
|
|
_maybe_forward(layer, x::AbstractArray, ys::AbstractArray...) = layer(x)
|
|
|
|
"""
|
|
ConditionalChain(layers...)
|
|
|
|
Based off `Flux.Chain` except takes in multiple inputs.
|
|
If a layer is of type `AbstractParallel` it uses all inputs else it uses only the first one.
|
|
The first input can therefore be conditioned on the other inputs.
|
|
"""
|
|
struct ConditionalChain{T<:Union{Tuple,NamedTuple}} <: AbstractParallel
|
|
layers::T
|
|
end
|
|
Flux.@functor ConditionalChain
|
|
|
|
ConditionalChain(xs...) = ConditionalChain(xs)
|
|
function ConditionalChain(; kw...)
|
|
:layers in keys(kw) && throw(ArgumentError("a Chain cannot have a named layer called `layers`"))
|
|
isempty(kw) && return ConditionalChain(())
|
|
ConditionalChain(values(kw))
|
|
end
|
|
|
|
Flux.@forward ConditionalChain.layers Base.getindex, Base.length, Base.first, Base.last,
|
|
Base.iterate, Base.lastindex, Base.keys, Base.firstindex
|
|
|
|
Base.getindex(c::ConditionalChain, i::AbstractArray) = ConditionalChain(c.layers[i]...)
|
|
|
|
function (c::ConditionalChain)(x, ys...)
|
|
for layer in c.layers
|
|
x = _maybe_forward(layer, x, ys...)
|
|
end
|
|
x
|
|
end
|
|
|
|
function Base.show(io::IO, c::ConditionalChain)
|
|
print(io, "ConditionalChain(")
|
|
Flux._show_layers(io, c.layers)
|
|
print(io, ")")
|
|
end
|
|
|
|
function _big_show(io::IO, m::ConditionalChain{T}, indent::Integer=0, name=nothing) where {T<:NamedTuple}
|
|
println(io, " "^indent, isnothing(name) ? "" : "$name = ", "ConditionalChain(")
|
|
for k in Base.keys(m.layers)
|
|
_big_show(io, m.layers[k], indent + 2, k)
|
|
end
|
|
if indent == 0
|
|
print(io, ") ")
|
|
_big_finale(io, m)
|
|
else
|
|
println(io, " "^indent, ")", ",")
|
|
end
|
|
end
|
|
|
|
"""
|
|
ConditionalSkipConnection(layers, connection)
|
|
|
|
The output is equivalent to `connection(layers(x, ys...), x)`.
|
|
Based off Flux.SkipConnection except it passes multiple arguments to layers.
|
|
"""
|
|
struct ConditionalSkipConnection{T,F} <: AbstractParallel
|
|
layers::T
|
|
connection::F
|
|
end
|
|
|
|
Flux.@functor ConditionalSkipConnection
|
|
|
|
function (skip::ConditionalSkipConnection)(x, ys...)
|
|
skip.connection(skip.layers(x, ys...), x)
|
|
end
|
|
|
|
function Base.show(io::IO, b::ConditionalSkipConnection)
|
|
print(io, "ConditionalSkipConnection(", b.layers, ", ", b.connection, ")")
|
|
end
|
|
|
|
### Show. Copied from Flux.jl/src/layers/show.jl
|
|
|
|
for T in [
|
|
:ConditionalChain, ConditionalSkipConnection
|
|
]
|
|
@eval function Base.show(io::IO, m::MIME"text/plain", x::$T)
|
|
if get(io, :typeinfo, nothing) === nothing # e.g. top level in REPL
|
|
Flux._big_show(io, x)
|
|
elseif !get(io, :compact, false) # e.g. printed inside a Vector, but not a Matrix
|
|
Flux._layer_show(io, x)
|
|
else
|
|
show(io, x)
|
|
end
|
|
end
|
|
end
|
|
|
|
_show_children(c::ConditionalChain) = c.layers
|