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Rhino Speech-to-Intent
Rust Quick Start

Rust SDKs will no longer be maintained after July 15, 2025. If you plan to use the Rhino Speech-to-Intent Rust SDK for commercial purposes, please contact us.

Platforms

  • Linux (x86_64)
  • macOS (x86_64, arm64)
  • Windows (x86_64)
  • Raspberry Pi (Zero, 3, 4, 5)

Requirements

  • Picovoice Account & AccessKey
  • Rust 1.54+
  • Cargo

Picovoice Account & AccessKey

Signup or Login to Picovoice Console to get your AccessKey. Make sure to keep your AccessKey secret.

Quick Start

Setup

  1. Download and install Rust.

  2. Add pv_rhino to the Cargo.toml manifest:

[dependencies]
pv_rhino = "*"

Usage

Create an instance of Rhino Speech-to-Intent using either a pre-built context file (.rhn) from the Rhino GitHub Repository or a custom context created with the Picovoice Console:

use rhino::{Rhino, RhinoBuilder};
let rhino: Rhino = RhinoBuilder::new(
"${ACCESS_KEY}",
"${CONTEXT_FILE_PATH}",
)
.init()
.expect("Unable to create Rhino");

Pass in frames of audio to the .process function:

fn next_audio_frame() -> Vec<i16> {
// ..
}
loop {
let audio_frame: Vec<i16> = next_audio_frame();
if let Ok(is_finalized) = rhino.process(&audio_frame) {
if is_finalized {
if let Ok(inference) = rhino.get_inference() {
if inference.is_understood {
let intent = inference.intent.unwrap();
let slots = inference.slots;
// take action based on inferred intent and slot values
} else {
// handle unsupported commands
}
}
}
}
}

Custom Contexts

Create custom context files using the Picovoice Console. Download the custom context file (.rhn) and pass it into the RhinoBuilder constructor.

Non-English Languages

Use the corresponding model file (.pv) to process non-English contexts. The model files for all supported languages are available on the Rhino Speech-to-Intent GitHub repository.

Pass in the model file using the model_path builder method to change the detection language:

let rhino: Rhino = RhinoBuilder::new(
"${ACCESS_KEY}",
"${CONTEXT_FILE_PATH}",
)
.model_path("${MODEL_FILE_PATH}")
.init()
.expect("Unable to create Rhino");

Demo

For the Rhino Speech-to-Intent Rust SDK, we offer demo applications that demonstrate how to use the Speech-to-Intent engine on real-time audio streams (i.e. microphone input) and audio files.

Setup

Clone the Rhino Speech-to-Intent GitHub Repository:

git clone --recurse-submodules https://github.com/Picovoice/rhino.git

Usage

Use the --help flag to see the usage options for the demo:

cd rhino/demo/rust/micdemo
cargo run --release -- --help

Ensure you have a working microphone connected to your system and run the following command to make inferences based on the given context file:

cargo run --release -- --access_key "${ACCESS_KEY}" --context_path "${CONTEXT_FILE_PATH}"

For more information on our Rhino Speech-to-Intent demos for Rust, head over to our GitHub repository.

Resources

Package

  • pv_rhino on crates.io

API

  • pv_rhino Rust API Docs

GitHub

  • Rhino Speech-to-Intent Rust SDK on GitHub
  • Rhino Speech-to-Intent Rust Demos on GitHub

Benchmark

  • Speech-to-Intent Benchmark

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