C# SpeechSynthesizer.SetOutputToAudioStream方法代码示例

        public void SpeakMessage(AudioVideoFlow flow, string message)
        {
            try
            {
                SpeechSynthesizer synth = new SpeechSynthesizer();
                SpeechAudioFormatInfo formatInfo = new SpeechAudioFormatInfo(16000, AudioBitsPerSample.Sixteen, Microsoft.Speech.AudioFormat.AudioChannel.Mono);
                SpeechSynthesisConnector connector = new SpeechSynthesisConnector();

                synth.SetOutputToAudioStream(connector.Stream, formatInfo);

                connector.AttachFlow(flow);
                connector.Start();

                synth.SpeakCompleted += new EventHandler<SpeakCompletedEventArgs>(
                    (sender, args) =>
                    {
                        connector.Stop();
                        synth.Dispose();
                    });

                synth.SpeakAsync(message);
            }
            catch (Exception ex)
            {
                Console.WriteLine("Failed to play the message. {0}", ex);
            }

        }

        private static void SynthToCam(string text, CameraWindow cw)
        {
            var synthFormat = new System.Speech.AudioFormat.SpeechAudioFormatInfo(System.Speech.AudioFormat.EncodingFormat.Pcm, 11025, 16, 1, 22100, 2, null);
            using (var synthesizer = new SpeechSynthesizer())
            {
                using (var waveStream = new MemoryStream())
                {

                    //write some silence to the stream to allow camera to initialise properly
                    var silence = new byte[1 * 22050];
                    waveStream.Write(silence, 0, silence.Length);

                    var pbuilder = new PromptBuilder();
                    var pStyle = new PromptStyle
                    {
                        Emphasis = PromptEmphasis.Strong,
                        Rate = PromptRate.Slow,
                        Volume = PromptVolume.ExtraLoud
                    };

                    pbuilder.StartStyle(pStyle);
                    pbuilder.StartParagraph();
                    pbuilder.StartVoice(VoiceGender.Male, VoiceAge.Adult, 2);
                    pbuilder.StartSentence();
                    pbuilder.AppendText(text);
                    pbuilder.EndSentence();
                    pbuilder.EndVoice();
                    pbuilder.EndParagraph();
                    pbuilder.EndStyle();

                    synthesizer.SetOutputToAudioStream(waveStream, synthFormat);
                    synthesizer.Speak(pbuilder);
                    synthesizer.SetOutputToNull();

                    //write some silence to the stream to allow camera to end properly
                    waveStream.Write(silence, 0, silence.Length);
                    waveStream.Seek(0, SeekOrigin.Begin);

                    var ds = new DirectStream(waveStream) { RecordingFormat = new WaveFormat(11025, 16, 1) };
                    var talkTarget = TalkHelper.GetTalkTarget(cw.Camobject, ds); 
                    ds.Start();
                    talkTarget.Start();
                    while (ds.IsRunning)
                    {
                        Thread.Sleep(100);
                    }
                    ds.Stop();
                    talkTarget.Stop();
                    talkTarget = null;
                    ds = null;
                }
            }


        }

 public void AddEndpoint(string ID, Stream outstream)
 {
     SpeechSynthesizer voice = new SpeechSynthesizer();
     if (outstream == null) voice.SetOutputToDefaultAudioDevice();
     else voice.SetOutputToAudioStream(outstream, new System.Speech.AudioFormat.SpeechAudioFormatInfo(
         16000, System.Speech.AudioFormat.AudioBitsPerSample.Sixteen, System.Speech.AudioFormat.AudioChannel.Mono));
     //if (chkIVONA.Checked) voice.SelectVoice("IVONA 2 Amy");
     //else voice.SelectVoice("Microsoft Anna")
     voices.Add(ID, voice);
     outStreams.Add(ID, outstream);
 }

        public void StartWithWelcome(AudioVideoFlow flow, LyncServer server)
        {
            _flow = flow;
            _server = server;
           //attach speech synthasis to audio flow
            _speechSynthesisConnector.AttachFlow(_flow);

            _speechSynthesizer = new SpeechSynthesizer();
            _speechSynthesizer.SetOutputToAudioStream(_speechSynthesisConnector, audioformat);
            _speechSynthesizer.SelectVoice("Microsoft Hazel Desktop");  //slightly more english

            var toneController = new ToneController(); //this is for the DTMF tones
            toneController.AttachFlow(_flow);
           
            _speechSynthesisConnector.Start();

            _speechSynthesizer.Speak("Welcome to the UCMA IVR Demo!");
            SpeakMenuOptions();
            toneController.ToneReceived += toneController_ToneReceived;
        }

        protected override void OnLoad(EventArgs e)
        {
            Visible = false;
            ShowInTaskbar = false;
            base.OnLoad(e);
 
            /*
             *  Get all installed voices
             * 
             */
            var voices = speech.GetInstalledVoices();
            string voice = "";
 
            foreach (InstalledVoice v in voices)
            {
                if (v.Enabled)
                    //voice = v.VoiceInfo.Name;
                    Console.WriteLine(v.VoiceInfo.Name);
                    
            }

            queuetimer = new System.Timers.Timer(250);
            queuetimer.Elapsed += (object sender, ElapsedEventArgs ev) => 
            {
                TTSRequest r;
                if (Queue.TryDequeue(out r))
                {
                    Console.WriteLine("dequeing off of concurrent queue...");
                    if (r.Interrupt)
                    {
                        // stop current TTS
                            if (IsSpeaking)
                            {
                                //speech.StopSpeaking();
                            }
                            if (IsSounding)
                            {
                                //sound.Stop();
                                if(sound.PlaybackState == PlaybackState.Playing) {
                                    sound.Stop(); 
                                }
                            }
                        // clear queue
                        SpeechQueue.Clear();
                    }
                    if(!r.Reset) {
                        SpeechQueue.Enqueue(r);
                    }
                    RequestCount++;
                }
                
                var eventdata = new Hashtable();
                eventdata.Add("ProcessedRequests", RequestCount);
                eventdata.Add("QueuedRequests", SpeechQueue.Count);
                eventdata.Add("IsSpeaking", IsSounding);
                InstrumentationEvent blam = new InstrumentationEvent();
                blam.EventName = "status";
                blam.Data = eventdata;
                NotifyGui(blam.EventMessage());  
            };

            // when this timer fires, it will pull off of the speech queue and speak it
            // the long delay also adds a little pause between tts requests.
            speechtimer = new System.Timers.Timer(250);
            speechtimer.Elapsed += (object sender, ElapsedEventArgs ev) =>
            {
                if (IsSpeaking.Equals(false))
                {
                    if (SpeechQueue.Count > 0)
                    {
                        TTSRequest r = SpeechQueue.Dequeue();
                        Console.WriteLine("dequeuing off of speech queue");
                        IsSpeaking = true;
                        speechtimer.Enabled = false;

                        //speech.SpeakAsync(r.Text);

                        //using (speech = new SpeechSynthesizer()) {
                        speech = new SpeechSynthesizer();
                            speech.SpeakCompleted += speech_SpeakCompleted;
                            format = new SpeechAudioFormatInfo(EncodingFormat.ALaw, 8000, 8, 1, 1, 2, null);
                            //format = new SpeechAudioFormatInfo(11025, AudioBitsPerSample.Sixteen, AudioChannel.Mono);
                           // var si = speech.GetType().GetMethod("SetOutputStream", BindingFlags.Instance | BindingFlags.NonPublic);
                            stream = new MemoryStream();
                            //si.Invoke(speech, new object[] { stream, format, true, true });
                            //speech.SetOutputToWaveStream(stream);
                            speech.SetOutputToAudioStream(stream, format);
                            speech.SelectVoice(config.getVoice (r.Language, r.Voice));
                            int rate = (r.Speed * 2 - 10);
                            
                            Console.WriteLine(rate);
                            try
                            {
                                speech.Rate = rate;
                            }
                            catch (ArgumentOutOfRangeException ex)
                            {
                                speech.Rate = 0;
                            }
                            speech.SpeakAsync(r.Text);
//.........这里部分代码省略.........

        private static byte[] GenerateVoiceAnnouncement(string announcement)
        {
            var synthesizer = new SpeechSynthesizer();
            var waveStream = new MemoryStream();
            var firstOrDefault = synthesizer.GetInstalledVoices()
                .FirstOrDefault(x => x.VoiceInfo.Name.ToUpper().Contains("DAVID"));
            if (firstOrDefault != null)
                synthesizer.SelectVoice(
                    firstOrDefault
                        .VoiceInfo.Name);
            synthesizer.SetOutputToAudioStream(waveStream,
                new SpeechAudioFormatInfo(EncodingFormat.Pcm,
                    44100, 16, 2, 176400, 2, null));
            synthesizer.Volume = 100;
            synthesizer.Rate = 1;
            synthesizer.Speak(announcement);
            synthesizer.SetOutputToNull();

            return waveStream.ToArray();
        }

        private void SendTextToSpeech(object obj) {
            Connection c = (Connection)obj;
            ConnectionStream stream = new ConnectionStream(c);
            SpeechSynthesizer s = new SpeechSynthesizer();
            using (MemoryStream memStream = new MemoryStream()) {
                s.SetOutputToAudioStream(memStream, new SpeechAudioFormatInfo(EncodingFormat.ALaw,
                    8000, 8, 1, 8000, 1, null));
                s.Speak(_textToSpeak);
                memStream.Seek(0, SeekOrigin.Begin);

                using (ConnectionWriter writer = new ConnectionWriter(stream)) {
                    writer.Reverse = true;
                    writer.Write(memStream);
                }
            }
        }