using Apewer.Models;
using System;
using System.Collections.Generic;
using System.Text;
// using System.Threading.Tasks;
using System.IO;
using Apewer.Internals.Interop;
#if NET40_OR_GREATER
using System.Speech.Synthesis;
#endif
namespace Apewer
{
/// 音频实用工具。
public sealed class AudioUtility
{
private AudioUtility() { }
#region WAVE 校验。
private static int mmioFOURCC(char ch0, char ch1, char ch2, char ch3)
{
int num = 0;
num |= ch0;
num |= (int)((uint)ch1 << 8);
num |= (int)((uint)ch2 << 16);
return num | (int)((uint)ch3 << 24);
}
private static int BytesToInt(byte ch0, byte ch1, byte ch2, byte ch3)
{
return mmioFOURCC((char)ch3, (char)ch2, (char)ch1, (char)ch0);
}
private static short BytesToInt16(byte ch0, byte ch1)
{
int num = ch1 | ch0 << 8;
return (short)num;
}
/// 检查字节数组是 WAVE。
public static bool IsWave(params byte[] data)
{
if (data == null || data.LongLength < 1L) return false;
int num = 0;
short num2 = -1;
bool flag = false;
if (data.Length < 12) return false; // throw new InvalidOperationException(SR.GetString("SoundAPIInvalidWaveHeader"));
if (data[0] == 82 && data[1] == 73 && data[2] == 70 && data[3] == 70)
{
if (data[8] == 87 && data[9] == 65 && data[10] == 86 && data[11] == 69)
{
num = 12;
int num3 = data.Length;
while (!flag && num < num3 - 8)
{
if (data[num] == 102 && data[num + 1] == 109 && data[num + 2] == 116 && data[num + 3] == 32)
{
flag = true;
int num4 = BytesToInt(data[num + 7], data[num + 6], data[num + 5], data[num + 4]);
int num5 = 16;
if (num4 != num5)
{
int num6 = 18;
if (num3 < num + 8 + num6 - 1) return false; // throw new InvalidOperationException(SR.GetString("SoundAPIInvalidWaveHeader"));
short num7 = BytesToInt16(data[num + 8 + num6 - 1], data[num + 8 + num6 - 2]);
if (num7 + num6 != num4) return false; // throw new InvalidOperationException(SR.GetString("SoundAPIInvalidWaveHeader"));
}
if (num3 < num + 9) return false; // throw new InvalidOperationException(SR.GetString("SoundAPIInvalidWaveHeader"));
num2 = BytesToInt16(data[num + 9], data[num + 8]);
num += num4 + 8;
}
else
{
num += 8 + BytesToInt(data[num + 7], data[num + 6], data[num + 5], data[num + 4]);
}
}
if (!flag) return false; // throw new InvalidOperationException(SR.GetString("SoundAPIInvalidWaveHeader"));
if (num2 == 1) return true;
if (num2 == 2) return true;
if (num2 == 3) return true;
return false; // throw new InvalidOperationException(SR.GetString("SoundAPIFormatNotSupported"));
}
return false; // throw new InvalidOperationException(SR.GetString("SoundAPIInvalidWaveHeader"));
}
return false; // throw new InvalidOperationException(SR.GetString("SoundAPIInvalidWaveHeader"));
}
#endregion
#region WinMM 控制。
/// WinMM:播放音频。
/// 波形数据。
/// 循环播放。
public static void Play(byte[] wave, bool loop = false)
{
if (wave == null || wave.LongLength == 0) return;
int flag = loop ? 9 : 1;
try { WinMM.PlaySound(wave, IntPtr.Zero, 6 | flag); } catch { }
}
/// WinMM:停止播放。
public static void Stop()
{
try { WinMM.PlaySound(null as string, IntPtr.Zero, 64); } catch { }
}
private static void MessageBeep(int type)
{
try { User32.MessageBeep(type); } catch { }
}
/// 播放系统声音。
public static void Asterisk() => MessageBeep(64);
/// 播放系统声音。
public static void Beep() => MessageBeep(0);
/// 播放系统声音。
public static void Exclamation() => MessageBeep(48);
/// 播放系统声音。
public static void Hand() => MessageBeep(16);
/// 播放系统声音。
public static void Question() => MessageBeep(32);
#endregion
#if NET40_OR_GREATER
/// 列举所有 Speech Voices 的 Name。
public static List ListVoices()
{
var list = new List();
using (var synthesizer = new SpeechSynthesizer())
{
var installed = synthesizer.GetInstalledVoices();
foreach (var voice in installed)
{
list.Add(voice.VoiceInfo.Name);
}
}
return list;
}
/// 获取 Voice 信息。
public static VoiceInfo GetVoice(string name)
{
if (string.IsNullOrEmpty(name)) return null;
using (var synthesizer = new SpeechSynthesizer())
{
var installed = synthesizer.GetInstalledVoices();
foreach (var voice in installed)
{
if (voice.VoiceInfo.Name == name) return voice.VoiceInfo;
}
}
return null;
}
/// 讲述文本,默认为异步执行。
public static void Speak(string text, string voice = null, bool async = true)
{
if (string.IsNullOrEmpty(text)) return;
if (async)
{
var wave = Render(text, voice);
Play(wave);
}
else
{
using (var synthesizer = new SpeechSynthesizer())
{
try
{
if (!string.IsNullOrEmpty(voice)) synthesizer.SelectVoice(voice);
synthesizer.Speak(text);
}
catch { }
}
}
}
/// 渲染为音频数据。
public static byte[] Render(string text, string voice = null)
{
if (string.IsNullOrEmpty(text)) return null;
using (var memory = new MemoryStream())
{
using (var synthesizer = new SpeechSynthesizer())
{
try
{
if (!string.IsNullOrEmpty(voice)) synthesizer.SelectVoice(voice);
synthesizer.SetOutputToWaveStream(memory);
synthesizer.Speak(text);
}
catch { }
}
var bytes = memory.ToArray();
return bytes;
}
}
#endif
}
}