speech_synthesizer_service.h

// Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef SPEECH_SYNTHESIS_SPEECH_SYNTHESIZER_SERVICE_H_
#define SPEECH_SYNTHESIS_SPEECH_SYNTHESIZER_SERVICE_H_

#include <chromeos/dbus/abstract_dbus_service.h>
#include <chromeos/dbus/dbus.h>
#include <chromeos/dbus/service_constants.h>

#include "pico/pico_tts_engine.h"
#include "threading.h"
#include "tts_engine.h"
#include "tts_service.h"

namespace speech_synthesis {
namespace gobject {
struct SpeechSynthesizer;
} // namespace gobject

// Provides a wrapper for exporting SpeechSynthesizerInterface to
// D-Bus and entering the glib run loop.
//
// ::g_type_init() must be called before this class is used.
class SpeechSynthesizerService : public chromeos::dbus::AbstractDbusService {
 public:
  explicit SpeechSynthesizerService();
  virtual ~SpeechSynthesizerService();

  ////////////////////////////////////////////////////////////////////////////
  // Implementing chromeos::dbus::AbstractDbusService
  virtual bool Initialize();
  virtual bool Reset();

  virtual bool Run();

  virtual const char* service_name() const {
    return kSpeechSynthesizerServiceName;
  }
  virtual const char* service_path() const {
    return kSpeechSynthesizerServicePath;
  }
  virtual const char* service_interface() const {
    return kSpeechSynthesizerInterface;
  }
  virtual GObject* service_object() const {
    return G_OBJECT(speech_synthesizer_.get());
  }

  // Interface function prototypes which wrap service.
  gboolean Speak(gchar *text,
                 GError **error);
  gboolean SetProperties(gchar *properties,
                         GError **error);
  gboolean Stop(GError **error);
  gboolean IsSpeaking(gboolean *OUT_isSpeaking_requested,
                GError **error);

protected:
 virtual GMainLoop* main_loop() { return main_loop_; }

 private:
  TtsService *ttsService;
  TtsEngine *engine;
  AudioOutput *audio_output;
  UtteranceOptions *utterance_options;

  scoped_ptr<gobject::SpeechSynthesizer> speech_synthesizer_;
  GMainLoop* main_loop_;

  gboolean AddProperties(gchar *properties);
};

} // namespace speech_synthesis
#endif // SPEECH_SYNTHESIS_SPEECH_SYNTHESIZER_SERVICE_H_