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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_SPEECH_CHROME_SPEECH_RECOGNITION_SERVICE_H_
#define CHROME_BROWSER_SPEECH_CHROME_SPEECH_RECOGNITION_SERVICE_H_
#include <string>
#include "base/containers/flat_map.h"
#include "base/files/file_path.h"
#include "base/memory/raw_ptr.h"
#include "base/scoped_observation.h"
#include "chrome/browser/speech/speech_recognition_service.h"
#include "components/soda/soda_installer.h"
#include "media/mojo/mojom/speech_recognition_service.mojom.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
namespace content {
class BrowserContext;
} // namespace content
namespace speech {
// Provides a mojo endpoint in the browser that allows the renderer process to
// launch and initialize the sandboxed speech recognition service
// process.
class ChromeSpeechRecognitionService : public SpeechRecognitionService,
public speech::SodaInstaller::Observer {
public:
explicit ChromeSpeechRecognitionService(content::BrowserContext* context);
ChromeSpeechRecognitionService(const ChromeSpeechRecognitionService&) =
delete;
ChromeSpeechRecognitionService& operator=(const SpeechRecognitionService&) =
delete;
~ChromeSpeechRecognitionService() override;
// SpeechRecognitionService:
void BindSpeechRecognitionContext(
mojo::PendingReceiver<media::mojom::SpeechRecognitionContext> receiver)
override;
void BindAudioSourceSpeechRecognitionContext(
mojo::PendingReceiver<media::mojom::AudioSourceSpeechRecognitionContext>
receiver) override;
// SodaInstaller::Observer:
void OnSodaInstalled(speech::LanguageCode language_code) override;
void OnSodaInstallError(speech::LanguageCode language_code,
speech::SodaInstaller::ErrorCode error_code) override;
void OnSodaProgress(speech::LanguageCode language_code,
int progress) override;
protected:
content::BrowserContext* context() { return context_; }
private:
// Launches the speech recognition service in a sandboxed utility process.
void LaunchIfNotRunning();
// Gets the path of the SODA configuration file for the selected language.
base::flat_map<std::string, base::FilePath> GetSodaConfigPaths();
// The browser context associated with the keyed service.
raw_ptr<content::BrowserContext> context_;
// The remote to the speech recognition service. The browser will not launch a
// new speech recognition service process if this remote is already bound.
mojo::Remote<media::mojom::SpeechRecognitionService>
speech_recognition_service_;
base::ScopedObservation<speech::SodaInstaller,
speech::SodaInstaller::Observer>
soda_installer_observer_{this};
};
} // namespace speech
#endif // CHROME_BROWSER_SPEECH_CHROME_SPEECH_RECOGNITION_SERVICE_H_
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