chromium/content/browser/speech/speech_recognition_engine.h

// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_ENGINE_H_
#define CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_ENGINE_H_

#include <vector>

#include "components/speech/audio_buffer.h"
#include "content/common/content_export.h"
#include "media/base/audio_parameters.h"
#include "media/mojo/mojom/speech_recognition_error.mojom.h"
#include "media/mojo/mojom/speech_recognition_result.mojom.h"

namespace blink {
namespace mojom {
class SpeechRecognitionError;
}  // namespace mojom
}  // namespace blink

namespace content {

// This is the interface for any speech recognition engine, local or network.
//
// The expected call sequence is:
// StartRecognition      Mandatory at beginning of SR.
//   TakeAudioChunk      For every audio chunk pushed.
//   AudioChunksEnded    Finalize the audio stream (omitted in case of errors).
// EndRecognition        Mandatory at end of SR (even on errors).
//
// No delegate callbacks are performed before StartRecognition or after
// EndRecognition. If a recognition was started, the caller can free the
// SpeechRecognitionEngine only after calling EndRecognition.

class CONTENT_EXPORT SpeechRecognitionEngine { … };

}  // namespace content

#endif  // CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_ENGINE_H_