ort_custom_op 0.2.0

A library for writing custom operators for the onnxruntime in Rust.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142

use crate::api::ElementType;
use crate::bindings::{OrtApi, OrtKernelContext};

use ndarray::{ArrayD, ArrayViewD};

/// Trait which qualifies types to be used as input to the
/// `kernel_compute` function of the custom operator.
pub trait Inputs<'s> {
    const INPUT_TYPES: &'static [ElementType];
    fn from_ort(api: &OrtApi, ctx: &'s OrtKernelContext) -> Self;
}

/// Trait which qualifies types to be used as outputs by the
/// `kernel_compute` function of the custom operator.
pub trait Outputs {
    const OUTPUT_TYPES: &'static [ElementType];
    fn write_to_ort(self, api: &OrtApi, ctx: &mut OrtKernelContext);
}

trait Input<'s> {
    const INPUT_TYPE: ElementType;

    fn from_ort(api: &OrtApi, ctx: &'s OrtKernelContext, idx: usize) -> Self;
}

macro_rules! impl_input_non_string {
    ($ty:ty, $variant:tt) => {
        impl<'s> Input<'s> for ArrayViewD<'s, $ty> {
            const INPUT_TYPE: ElementType = ElementType::$variant;

            fn from_ort(api: &OrtApi, ctx: &'s OrtKernelContext, idx: usize) -> Self {
                api.get_input_array::<$ty>(ctx, idx)
                    .expect("Loading input data of given type failed.")
            }
        }
    };
}

impl_input_non_string!(bool, Bool);
impl_input_non_string!(f32, F32);
impl_input_non_string!(f64, F64);
impl_input_non_string!(i32, I32);
impl_input_non_string!(i64, I64);
impl_input_non_string!(u16, U16);
impl_input_non_string!(u32, U32);
impl_input_non_string!(u64, U64);
impl_input_non_string!(u8, U8);

impl<'s> Input<'s> for ArrayD<String> {
    const INPUT_TYPE: ElementType = ElementType::String;

    fn from_ort(api: &OrtApi, ctx: &'s OrtKernelContext, idx: usize) -> Self {
        api.get_input_array_string(ctx, idx)
            .expect("Loading input data of given type failed.")
    }
}

macro_rules! impl_inputs {
    ($($idx:literal),+; $($param:tt),+  ) => {
        impl<'s, $($param,)*> Inputs<'s> for ($($param,)*)
        where
            $($param : Input<'s>,)*
        {
            const INPUT_TYPES: &'static [ElementType] = &[$(<$param as Input>::INPUT_TYPE),*];
            fn from_ort(api: &OrtApi, ctx: &'s OrtKernelContext) -> Self {

                (
                    $($param::from_ort(api, ctx, $idx), )*
                )
            }
        }
    };
}
impl_inputs! {0; A}
impl_inputs! {0, 1; A, B}
impl_inputs! {0, 1, 2; A, B, C}
impl_inputs! {0, 1, 2, 3; A, B, C, D}
impl_inputs! {0, 1, 2, 3, 4; A, B, C, D, E}
impl_inputs! {0, 1, 2, 3, 4, 5; A, B, C, D, E, F}

trait Output {
    const OUTPUT_TYPE: ElementType;

    fn write_to_ort(self, api: &OrtApi, ctx: &mut OrtKernelContext, idx: usize);
}

macro_rules! impl_output_non_string {
    ($ty:ty, $variant:tt) => {
        impl<'s> Output for ArrayD<$ty> {
            const OUTPUT_TYPE: ElementType = ElementType::$variant;

            fn write_to_ort(self, api: &OrtApi, ctx: &mut OrtKernelContext, idx: usize) {
                let shape = self.shape();
                let shape_i64: Vec<_> = shape.iter().map(|v| *v as i64).collect();
                let val = unsafe { api.get_output(ctx, idx, &shape_i64) }.unwrap();
                let mut arr = api.get_tensor_data_mut(val, &shape).unwrap();
                arr.assign(&self);
            }
        }
    };
}

impl Output for ArrayD<String> {
    const OUTPUT_TYPE: ElementType = ElementType::String;

    fn write_to_ort(self, api: &OrtApi, ctx: &mut OrtKernelContext, idx: usize) {
        api.fill_string_tensor(ctx, idx, self).unwrap();
    }
}

impl_output_non_string!(bool, Bool);
impl_output_non_string!(f32, F32);
impl_output_non_string!(f64, F64);
impl_output_non_string!(i32, I32);
impl_output_non_string!(i64, I64);
impl_output_non_string!(u16, U16);
impl_output_non_string!(u32, U32);
impl_output_non_string!(u64, U64);
impl_output_non_string!(u8, U8);

// TODO: Impl string output

macro_rules! impl_outputs {
    ($($idx:tt),+; $($param:tt),+  ) => {
        impl<'s, $($param,)*> Outputs for ($($param,)*)
        where
            $($param : Output,)*
        {
            const OUTPUT_TYPES: &'static [ElementType] = &[$(<$param as Output>::OUTPUT_TYPE),*];
            fn write_to_ort(self, api: &OrtApi, ctx: &mut OrtKernelContext,) {
                $(self.$idx.write_to_ort(api, ctx, $idx);)*
            }
        }
    };
}

impl_outputs! {0; A}
impl_outputs! {0, 1; A, B}
impl_outputs! {0, 1, 2; A, B, C}
impl_outputs! {0, 1, 2, 3; A, B, C, D}
impl_outputs! {0, 1, 2, 3, 4; A, B, C, D, E}
impl_outputs! {0, 1, 2, 3, 4, 5; A, B, C, D, E, F}