重新想象 Windows 8.1 Store Apps (87) - TTS: Speak Text, Speak SSML

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重新想象 Windows 8.1 Store Apps (87) - TTS: Speak Text, Speak SSML

作者：webabcd

介绍
重新想象 Windows 8.1 Store Apps 之 TTS（Text To Speech）

• Speak Text
• Speak SSML

示例
1、演示如何通过 TTS 朗读一段文本，以及如何将其保存为音频文件
SpeakText.xaml

<Page

    x:Class="Windows81.TTS.SpeakText"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    xmlns:local="using:Windows81.TTS"

    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

    mc:Ignorable="d">

    <Grid Background="Transparent">

        <StackPanel Margin="120 0 0 0">

            <!--用于播放音频-->

            <MediaElement Name="mediaElement" AutoPlay="False" />

            <TextBlock Name="lblMsg" FontSize="14.667" Margin="0 10 0 0" />

            <!--需要被 TTS 的文本-->

            <TextBlock Name="lblText" FontSize="14.667" Margin="0 10 0 0" Text="TTS 是 Text To Speech 的缩写，即“从文本到语音”，是人机对话的一部分，让机器能够说话。" />

            <!--开始 TTS-->

            <Button Name="btnSpeakText" Content="Speek Text" Click="btnSpeakText_Click" Margin="0 10 0 0" />

            <!--保存 TTS 转换出的音频文件-->

            <Button Name="btnSaveAudio" Content="Save Audio" Click="btnSaveAudio_Click" Margin="0 10 0 0" />

        </StackPanel>

    </Grid>

</Page>

SpeakText.xaml.cs

/*

 * 演示如何通过 TTS 朗读一段文本，以及如何将其保存为音频文件

 *

 * 注：Windows Phone 中的“TTS, 语音识别, 语音命令”请参见：http://www.cnblogs.com/webabcd/archive/2014/01/02/3501356.html

 */

using System;

using System.Collections.Generic;

using Windows.Media.SpeechSynthesis;

using Windows.Storage;

using Windows.Storage.Pickers;

using Windows.Storage.Streams;

using Windows.UI.Popups;

using Windows.UI.Xaml;

using Windows.UI.Xaml.Controls;

using Windows.UI.Xaml.Media;

namespace Windows81.TTS

{

    public sealed partial class SpeakText : Page

    {

        // TTS 引擎

        private SpeechSynthesizer _synthesizer = new SpeechSynthesizer();

        public SpeakText()

        {

            this.InitializeComponent();

            lblMsg.Text = "系统支持的语音有：";

            // TTS 引擎所支持的全部语音信息

            var voices = SpeechSynthesizer.AllVoices;

            foreach (VoiceInformation voice in voices)

            {

                lblMsg.Text += voice.DisplayName + ", ";

            }

            lblMsg.Text += Environment.NewLine;

            // 获取或设置当前 TTS 引擎所使用的语音

            lblMsg.Text += "当前 TTS 使用的语音是：" +　_synthesizer.Voice.DisplayName;

            // SpeechSynthesizer 实现了 IDisposable 接口

            // _synthesizer.Dispose();

            this.mediaElement.CurrentStateChanged += mediaElement_CurrentStateChanged;

        }

        void mediaElement_CurrentStateChanged(object sender, RoutedEventArgs e)

        {

            if (mediaElement.CurrentState == MediaElementState.Paused)

            {

                btnSpeakText.IsEnabled = true;

            }

        }

        // 播放 TTS 音频

        private async void btnSpeakText_Click(object sender, RoutedEventArgs e)

        {

            // TTS 引擎生成的音频流

            SpeechSynthesisStream synthesisStream;

            try

            {

                // 通过 TTS 引擎将字符串转换成音频流

                synthesisStream = await _synthesizer.SynthesizeTextToStreamAsync(lblText.Text);

            }

            catch (Exception ex)

            {

                lblMsg.Text = ex.ToString();

                synthesisStream = null;

                btnSpeakText.IsEnabled = true;

            }

            // 播放音频流

            mediaElement.AutoPlay = true;

            mediaElement.SetSource(synthesisStream, synthesisStream.ContentType);

            mediaElement.Play();

        }

        // 保存 TTS 音频

        private async void btnSaveAudio_Click(object sender, RoutedEventArgs e)

        {

            FileSavePicker savePicker = new FileSavePicker();

            savePicker.DefaultFileExtension = ".wav";

            savePicker.FileTypeChoices.Add("Audio file", new List<string>() { ".wav" });

            StorageFile file = await savePicker.PickSaveFileAsync();

            if (file != null)

            {

                btnSaveAudio.IsEnabled = false;

                SpeechSynthesisStream synthesisStream;

                try

                {

                    synthesisStream = await _synthesizer.SynthesizeTextToStreamAsync(lblText.Text);

                }

                catch (Exception ex)

                {

                    lblMsg.Text = ex.ToString();

                    synthesisStream = null;

                    btnSaveAudio.IsEnabled = true;

                }

                // 保存音频数据到文件

                Windows.Storage.Streams.Buffer buffer = new Windows.Storage.Streams.Buffer();

                IRandomAccessStream writeStream = (IRandomAccessStream)await file.OpenAsync(FileAccessMode.ReadWrite);

                IOutputStream outputStream = writeStream.GetOutputStreamAt();

                DataWriter dataWriter = new DataWriter(outputStream);

                while (synthesisStream.Position < synthesisStream.Size)

                {

                    await synthesisStream.ReadAsync(buffer, , InputStreamOptions.None);

                    dataWriter.WriteBuffer(buffer);

                }

                dataWriter.StoreAsync().AsTask().Wait();

                outputStream.FlushAsync().AsTask().Wait();

                btnSaveAudio.IsEnabled = true;

            }

        }

    }

}

2、演示如何通过 TTS 朗读 SSML 协议文档，以及如何将其保存为音频文件
SpeakSSML.xaml

<Page

    x:Class="Windows81.TTS.SpeakSSML"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    xmlns:local="using:Windows81.TTS"

    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

    mc:Ignorable="d">

    <Grid Background="Transparent">

        <StackPanel Margin="120 0 0 0">

            <!--用于播放音频-->

            <MediaElement Name="mediaElement" AutoPlay="False" />

            <TextBlock Name="lblMsg" FontSize="14.667" Margin="0 10 0 0" />

            <!--开始 TTS-->

            <Button Name="btnSpeakSSML" Content="Speek SSML" Click="btnSpeakSSML_Click" Margin="0 10 0 0" />

            <!--保存 TTS 转换出的音频文件-->

            <Button Name="btnSaveAudio" Content="Save Audio" Click="btnSaveAudio_Click" Margin="0 10 0 0" />

        </StackPanel>

    </Grid>

</Page>

SpeakSSML.xaml.cs

/*

 * 演示如何通过 TTS 朗读 SSML 协议文档，以及如何将其保存为音频文件

 *

 * 注：Windows Phone 中的“TTS, 语音识别, 语音命令”请参见：http://www.cnblogs.com/webabcd/archive/2014/01/02/3501356.html

 *

 *

 * 另外：

 * 1、SSML - Speech Synthesis Markup Language

 * 2、微软关于 ssml 的说明：http://msdn.microsoft.com/en-us/library/hh361578

 * 3、W3C 关于 ssml 的说明：http://www.w3.org/TR/speech-synthesis/

 */

using System;

using System.Collections.Generic;

using Windows.Media.SpeechSynthesis;

using Windows.Storage;

using Windows.Storage.Pickers;

using Windows.Storage.Streams;

using Windows.UI.Popups;

using Windows.UI.Xaml;

using Windows.UI.Xaml.Controls;

using Windows.UI.Xaml.Media;

namespace Windows81.TTS

{

    public sealed partial class SpeakSSML : Page

    {

        // TTS 引擎

        private SpeechSynthesizer _synthesizer = new SpeechSynthesizer();

        public SpeakSSML()

        {

            this.InitializeComponent();

            lblMsg.Text = "系统支持的语音有：";

            // TTS 引擎所支持的全部语音信息

            var voices = SpeechSynthesizer.AllVoices;

            foreach (VoiceInformation voice in voices)

            {

                lblMsg.Text += voice.DisplayName + ", ";

            }

            lblMsg.Text += Environment.NewLine;

            // 获取或设置当前 TTS 引擎所使用的语音

            lblMsg.Text += "当前 TTS 使用的语音是：" + _synthesizer.Voice.DisplayName;

            // SpeechSynthesizer 实现了 IDisposable 接口

            // _synthesizer.Dispose();

            this.mediaElement.CurrentStateChanged += mediaElement_CurrentStateChanged;

        }

        void mediaElement_CurrentStateChanged(object sender, RoutedEventArgs e)

        {

            if (mediaElement.CurrentState == MediaElementState.Paused)

            {

                btnSpeakSSML.IsEnabled = true;

            }

        }

        // 播放 TTS 音频（SSML）

        private async void btnSpeakSSML_Click(object sender, RoutedEventArgs e)

        {

            // TTS 引擎生成的音频流

            SpeechSynthesisStream synthesisStream;

            try

            {

                // 构造一个 SSML 协议文档

                string ssml = "<speak version=\"1.0\" xmlns=\"http://www.w3.org/2001/10/synthesis\" xml:lang=\"zh-CN\">"; // 中文

                ssml += "<voice gender=\"male\">"; // 男声

                ssml += "<prosody rate=\"-50%\">"; // 语速放慢 50%

                ssml += "TTS 是 Text To Speech 的缩写，即“从文本到语音”，是人机对话的一部分，让机器能够说话。";

                ssml += "</prosody>";

                ssml += "</voice>";

                ssml += "</speak>";

                // 通过 TTS 引擎将 SSML 协议文档转换成音频流

                synthesisStream = await _synthesizer.SynthesizeSsmlToStreamAsync(ssml);

            }

            catch (Exception ex)

            {

                lblMsg.Text = ex.ToString();

                synthesisStream = null;

                btnSpeakSSML.IsEnabled = true;

            }

            // 播放音频流

            mediaElement.AutoPlay = true;

            mediaElement.SetSource(synthesisStream, synthesisStream.ContentType);

            mediaElement.Play();

        }

        // 保存 TTS 音频（SSML）

        private async void btnSaveAudio_Click(object sender, RoutedEventArgs e)

        {

            FileSavePicker savePicker = new FileSavePicker();

            savePicker.DefaultFileExtension = ".wav";

            savePicker.FileTypeChoices.Add("Audio file", new List<string>() { ".wav" });

            StorageFile file = await savePicker.PickSaveFileAsync();

            if (file != null)

            {

                btnSaveAudio.IsEnabled = false;

                SpeechSynthesisStream synthesisStream;

                try

                {

                    // 构造一个 SSML 协议文档

                    string ssml = "<speak version=\"1.0\" xmlns=\"http://www.w3.org/2001/10/synthesis\" xml:lang=\"zh-CN\">"; // 中文

                    ssml += "<voice gender=\"male\">"; // 男声

                    ssml += "<prosody rate=\"-50%\">"; // 语速放慢 50%

                    ssml += "TTS 是 Text To Speech 的缩写，即“从文本到语音”，是人机对话的一部分，让机器能够说话。";

                    ssml += "</prosody>";

                    ssml += "</voice>";

                    ssml += "</speak>";

                    // 通过 TTS 引擎将 SSML 协议文档转换成音频流

                    synthesisStream = await _synthesizer.SynthesizeSsmlToStreamAsync(ssml);

                }

                catch (Exception ex)

                {

                    lblMsg.Text = ex.ToString();

                    synthesisStream = null;

                    btnSaveAudio.IsEnabled = true;

                }

                // 保存音频数据到文件

                Windows.Storage.Streams.Buffer buffer = new Windows.Storage.Streams.Buffer();

                IRandomAccessStream writeStream = (IRandomAccessStream)await file.OpenAsync(FileAccessMode.ReadWrite);

                IOutputStream outputStream = writeStream.GetOutputStreamAt();

                DataWriter dataWriter = new DataWriter(outputStream);

                while (synthesisStream.Position < synthesisStream.Size)

                {

                    await synthesisStream.ReadAsync(buffer, , InputStreamOptions.None);

                    dataWriter.WriteBuffer(buffer);

                }

                dataWriter.StoreAsync().AsTask().Wait();

                outputStream.FlushAsync().AsTask().Wait();

                btnSaveAudio.IsEnabled = true;

            }

        }

    }

}

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