components/arc/common/tts.mojom

// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Next MinVersion: 2

module arc.mojom;

[Extensible]
enum TtsEventType {
  START = 0,
  END,
  INTERRUPTED,
  ERROR
};

// Represents a tts utterance sent from Chrome to Android.
struct TtsUtterance {
  uint32 utteranceId;
  string text;
  double rate;
  double pitch;
};

// Next Method ID: 1
interface TtsHost {
  // Notifies Chrome of Android tts events.
  OnTtsEvent@0(uint32 utteranceId,
               TtsEventType event_type,
               uint32 charIndex,
               string error_msg);
};

// Next Method ID: 4
interface TtsInstance {
  // DEPRECATED: Please use Init@3 instead.
  InitDeprecated@0(TtsHost host_ptr);

  // Establishes full-duplex communication with the host.
  [MinVersion=1] Init@3(TtsHost host_ptr) => ();

  // Sends an utterance to Android for synthesis.
  Speak@1(TtsUtterance utterance);

  // Sends a stop request to Android text to speech.
  Stop@2();
};