futuresdr 0.0.39

An Experimental Async SDR Runtime for Heterogeneous Architectures.
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

use std::collections::HashMap;

use crate::runtime::BlockMeta;
use crate::runtime::MessageOutputs;
use crate::runtime::Pmt;
use crate::runtime::Result;
use crate::runtime::WorkIo;

/// Forward messages.
#[derive(Block)]
#[message_inputs(r#in)]
#[message_outputs(out)]
#[null_kernel]
pub struct MessageAnnotator {
    annotation_prototype: HashMap<String, Pmt>,
    payload_field_name: Option<String>,
}

impl MessageAnnotator {
    /// Create MessageCopy block
    pub fn new(annotation: HashMap<String, Pmt>, payload_field_name: Option<&str>) -> Self {
        Self {
            annotation_prototype: annotation,
            payload_field_name: payload_field_name.map(String::from),
        }
    }

    async fn r#in(
        &mut self,
        io: &mut WorkIo,
        mio: &mut MessageOutputs,
        _meta: &mut BlockMeta,
        p: Pmt,
    ) -> Result<Pmt> {
        if let Some(payload_field_name) = self.payload_field_name.clone() {
            match p {
                Pmt::Finished => {
                    io.finished = true;
                }
                p => {
                    let mut annotated_message = self.annotation_prototype.clone();
                    annotated_message.insert(payload_field_name, p);
                    mio.post("out", Pmt::MapStrPmt(annotated_message)).await?;
                }
            }
        } else {
            match p {
                Pmt::Finished => {
                    io.finished = true;
                }
                Pmt::MapStrPmt(mut annotated_message) => {
                    annotated_message.extend(self.annotation_prototype.clone());
                    mio.post("out", Pmt::MapStrPmt(annotated_message)).await?;
                }
                _ => return Ok(Pmt::InvalidValue),
            }
        }
        Ok(Pmt::Ok)
    }
}