89 lines
2.1 KiB
Rust
89 lines
2.1 KiB
Rust
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use bincode::{Decode, Encode};
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use crate::Error;
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const SIGNAL_DATA_LENGTH: usize = 4;
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const NETWORK_DATA_LENGTH: usize = 6;
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type SignalBufferReturn = [u8; SIGNAL_DATA_LENGTH];
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type NetworkBufferReturn = [u8; NETWORK_DATA_LENGTH];
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static BINCODE_CONFIG: bincode::config::Configuration<bincode::config::BigEndian> =
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bincode::config::standard().with_big_endian();
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#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Encode, Decode)]
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pub struct Speaker {
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id: u8,
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}
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impl Speaker {
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pub fn new(id: u8) -> Self {
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Self { id }
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}
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pub fn get_id(&self) -> u8 {
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self.id
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}
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}
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#[derive(Debug, Encode, Decode)]
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pub enum SignalType {
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AudioDatum,
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SpeakerLeft,
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}
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#[derive(Debug, Encode, Decode)]
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pub struct Signal {
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signal_type: SignalType,
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speaker: Speaker,
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data: [u8; SIGNAL_DATA_LENGTH],
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}
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impl Signal {
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pub fn unpack(data: NetworkBufferReturn) -> Result<Self, Error> {
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Ok(bincode::decode_from_slice::<Self, _>(&data, BINCODE_CONFIG)
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.map_err(|inner| Error::Deserialization(inner.to_string()))?
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.0)
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}
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fn pack(self) -> NetworkBufferReturn {
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let encoded = serialize(self);
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assert_eq!(encoded.len(), NETWORK_DATA_LENGTH);
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let mut buffer = NetworkBufferReturn::default();
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buffer.copy_from_slice(&encoded);
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buffer
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}
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pub fn pack_audio_datum(speaker: Speaker, audio_datum: f32) -> NetworkBufferReturn {
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let signal = Self {
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signal_type: SignalType::AudioDatum,
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speaker,
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data: audio_datum.to_be_bytes(),
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};
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Self::pack(signal)
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}
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pub fn pack_speaker_left(speaker: Speaker) -> NetworkBufferReturn {
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let signal = Self {
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signal_type: SignalType::SpeakerLeft,
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speaker,
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data: SignalBufferReturn::default(),
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};
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signal.pack()
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}
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}
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fn serialize<E>(value: E) -> Vec<u8>
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where
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E: bincode::enc::Encode,
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{
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bincode::encode_to_vec(value, BINCODE_CONFIG)
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.map_err(|inner| Error::Serialization(inner.to_string()))
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.unwrap()
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}
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