grpc-swift/Examples/Google/SpeechToText

Speech-To-Text gRPC iOS Example

Description

This application demonstrates Bidirectional Streaming to convert streamed audio data into text and display the Server processing live using gRPC Swift, built on top of SwiftNIO. Much of the gRPC specific logic can be found in Sources/SpeechService.swift.

Technologies

• gRPC Swift
• Google Speech-To-Text API
• SnapKit

Prerequisites

Please be sure to perform the preliminary steps in Examples/Google/README, specifically enabling "Cloud Speech-to-Text API" from Machine Learning section

Acquiring an API Key

This project requires a Google Cloud API Key. Please register and create an API key in order to consume the API.

Project Setup

1. Clone the repository
2. Navigate to the root directory (Examples/Google/SpeechToText)
3. Run make protos to pull the most recent .proto files from the googleapis repository
4. run make generate to leverage the protoc plugin to generate the Swift interfaces
   • Note: Please refer to Getting the protoc Plugins. For this tutorial, the Makefile requires that the protoc-gen-grpc-swift and protoc-gen-swift are on the users PATH.
5. Open the .xcodeproj
6. Open the Constants.swift file and assign your generated Google Cloud API Key to the apiKey variable.
   • Note: Once you add the API Key, feel free to remove the forced warning/reminder on line 23.
7. Run the application!

Helpful Links

• Getting Started with Speech APIs

NOTE: Implementation of the AudioStreamManager is based off of Google's Example Audio Streaming