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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,145 @@ | ||
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| function define_packed(ty::DataType) | ||
| packed_offsets = cumsum([sizeof(x) for x in ty.types]) | ||
| sz = pop!(packed_offsets) | ||
| pushfirst!(packed_offsets, 0) | ||
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| @eval begin | ||
| function Base.read(io::IO, ::Type{$ty}) | ||
| bytes = read!(io, Array{UInt8}(undef, $sz...)) | ||
| hdr = $(Expr(:new, ty, [:(unsafe_load(convert(Ptr{$(ty.types[i])}, pointer(bytes)+$(packed_offsets[i])))) for i = 1:length(packed_offsets)]...,)) | ||
| if hdr.sizeof_hdr == ntoh(Int32(348)) | ||
| return byteswap(hdr), true | ||
| end | ||
| hdr, false | ||
| end | ||
| function Base.write(io::IO, x::$ty) | ||
| bytes = UInt8[] | ||
| for name in fieldnames($ty) | ||
| append!(bytes, reinterpret(UInt8, [getfield(x,name)])) | ||
| end | ||
| write(io, bytes) | ||
| $sz | ||
| end | ||
| end | ||
| nothing | ||
| end | ||
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| mutable struct NIfTI1Header | ||
| sizeof_hdr::Int32 | ||
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| data_type::NTuple{10,UInt8} | ||
| db_name::NTuple{18,UInt8} | ||
| extents::Int32 | ||
| session_error::Int16 | ||
| regular::Int8 | ||
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| dim_info::Int8 | ||
| dim::NTuple{8,Int16} | ||
| intent_p1::Float32 | ||
| intent_p2::Float32 | ||
| intent_p3::Float32 | ||
| intent_code::Int16 | ||
| datatype::Int16 | ||
| bitpix::Int16 | ||
| slice_start::Int16 | ||
| pixdim::NTuple{8,Float32} | ||
| vox_offset::Float32 | ||
| scl_slope::Float32 | ||
| scl_inter::Float32 | ||
| slice_end::Int16 | ||
| slice_code::Int8 | ||
| xyzt_units::Int8 | ||
| cal_max::Float32 | ||
| cal_min::Float32 | ||
| slice_duration::Float32 | ||
| toffset::Float32 | ||
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| glmax::Int32 | ||
| glmin::Int32 | ||
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| descrip::NTuple{80,UInt8} | ||
| aux_file::NTuple{24,UInt8} | ||
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| qform_code::Int16 | ||
| sform_code::Int16 | ||
| quatern_b::Float32 | ||
| quatern_c::Float32 | ||
| quatern_d::Float32 | ||
| qoffset_x::Float32 | ||
| qoffset_y::Float32 | ||
| qoffset_z::Float32 | ||
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| srow_x::NTuple{4,Float32} | ||
| srow_y::NTuple{4,Float32} | ||
| srow_z::NTuple{4,Float32} | ||
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| intent_name::NTuple{16,UInt8} | ||
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| magic::NTuple{4,UInt8} | ||
| end | ||
| define_packed(NIfTI1Header) | ||
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| # byteswapping | ||
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| function byteswap(hdr::NIfTI1Header) | ||
| for fn in fieldnames(typeof(hdr)) | ||
| val = getfield(hdr, fn) | ||
| if isa(val, Number) && sizeof(val) > 1 | ||
| setfield!(hdr, fn, ntoh(val)) | ||
| elseif isa(val, NTuple) && sizeof(eltype(val)) > 1 | ||
| setfield!(hdr, fn, map(ntoh, val)) | ||
| end | ||
| end | ||
| hdr | ||
| end | ||
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| """ | ||
| freqdim(x)::Int | ||
| Returns the frequency dimension. | ||
| """ | ||
| freqdim(x::NIfTI1Header) = Int(getfield(x, :dim_info) & 0x03) | ||
| freqdim(x) = freqdim(header(x)) | ||
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| """ | ||
| phasedim(x)::Int | ||
| Returns the phase dimension. | ||
| """ | ||
| phasedim(x::NIfTI1Header) = Int((getfield(x, :dim_info) >> 2) & 0x03) | ||
| phasedim(x) = phasedim(header(x)) | ||
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| """ | ||
| slicedim(x)::Int | ||
| Returns the slice dimension. | ||
| """ | ||
| slicedim(x::NIfTI1Header) = Int((getfield(x, :dim_info) >> 4) & 0x03) | ||
| slicedim(x) = slicedim(header(x)) | ||
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| """ | ||
| slice_start(x)::Int | ||
| Which slice corresponds to the first slice acquired during MRI acquisition (i.e. not padded slices). | ||
| """ | ||
| slice_start(x::NIfTI1Header) = Int(getfield(x, :slice_start)) + 1 | ||
| slice_start(x) = slice_start(header(x)) | ||
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| """ | ||
| slice_end(x)::Int | ||
| Which slice corresponds to the last slice acquired during MRI acquisition (i.e. not padded slices). | ||
| """ | ||
| slice_end(x::NIfTI1Header) = Int(getfield(x, :slice_end)) + 1 | ||
| slice_end(x) = slice_end(header(x)) | ||
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| """ | ||
| slice_duration(x) | ||
| Time to acquire one slice | ||
| """ | ||
| slice_duration(x::NIfTI1Header) = getfield(x, :slice_duration) | ||
| slice_duration(x) = slice_duration(header(x)) | ||
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@JuliaRegistrator register
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Registration pull request created: JuliaRegistries/General/57225
After the above pull request is merged, it is recommended that a tag is created on this repository for the registered package version.
This will be done automatically if the Julia TagBot GitHub Action is installed, or can be done manually through the github interface, or via: