TtsApiTest tests Chrome TTS extension APIs.TtsControllerDelegateImplUnittest in chrome/browser/speech TtsControllerUnittest in content/browser/speech PATTS is the built-in Chrome OS text-to-speech engine.
TtsEngineExtensionAPI forwards speech events to PATTS, or the network speech engine, or, coming soon, third-party speech engines. Platform APIs are in content/browser/speech, expect for Chrome OS's, which is in chrome/browser/speech.May differ by system, including Mac, Wind, Android, Arc++, and Chrome OS The TtsControllerDelegateImpl (in chrome/) provides chrome OS specific functionality. The TtsControllerImpl (in content/) processes utterances and sends them to the correct output engine. This allows web apps to do text-to-speech via the device's speech synthesizer.Ī WebSpeechSynthesisUtterance is created by window.SpeechSynthesis The extension is passed an Options object in, which is translated into a tts_controller Utterance.Ĭhrome implements Window.SpeechSynthesis from the Web Speech API. Input to the extension is first processed in the TtsExtensionApi.
#MAC CODE FOR TEXT TO SPEECH MAC#
The chrome.tts extension API allows extensions to request speech across Windows, Mac or Chrome OS, using native speech synthesis.
Code structureĪ brief outline of the flow from speech request to the resulting speech on any platform. This document is an overview of the relevant code and code structure around synthesized speech. Chrome and Chrome OS allow developers to produce synthesized speech.
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