unity 通过更改系统方式调整全部声音的音量 - 纳金网

using UnityEngine;
using System.Runtime.InteropServices;
using System;
using DG.Tweening;
using UnityEngine.UI;
[DisallowMultipleComponent]
public class SoundManger : MonoBehaviour
{
#region System
[DllImport("user32.dll")]
static extern void keybd_event(byte bVk, byte bScan, UInt32 dwFlags, UInt32 dwExtraInfo);
[DllImport("user32.dll")]
static extern Byte MapVirtualKey(UInt32 uCode, UInt32 uMapType);
private const byte VK_VOLUME_MUTE = 0xAD;
private const byte VK_VOLUME_DOWN = 0xAE;
private const byte VK_VOLUME_UP = 0xAF;
private const UInt32 KEYEVENTF_EXTENDEDKEY = 0x0001;
private const UInt32 KEYEVENTF_KEYUP = 0x0002;
/// <summary>
/// 改变系统音量大小，增加
/// </summary>
public void SystemVolumeUp()
{
keybd_event(VK_VOLUME_UP, MapVirtualKey(VK_VOLUME_UP, 0), KEYEVENTF_EXTENDEDKEY, 0);
keybd_event(VK_VOLUME_UP, MapVirtualKey(VK_VOLUME_UP, 0), KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
}
/// <summary>
/// 改变系统音量大小，减小
/// </summary>
public void SystemVolumeDown()
{
keybd_event(VK_VOLUME_DOWN, MapVirtualKey(VK_VOLUME_DOWN, 0), KEYEVENTF_EXTENDEDKEY, 0);
keybd_event(VK_VOLUME_DOWN, MapVirtualKey(VK_VOLUME_DOWN, 0), KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
}
/// <summary>
/// 改变系统音量大小，静音
/// </summary>
public void SystemMute()
{
keybd_event(VK_VOLUME_MUTE, MapVirtualKey(VK_VOLUME_MUTE, 0), KEYEVENTF_EXTENDEDKEY, 0);
keybd_event(VK_VOLUME_MUTE, MapVirtualKey(VK_VOLUME_MUTE, 0), KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
}
#endregion
#region Program
[DllImport("Winmm.dll")]
private static extern int waveOutSetVolume(int hwo, System.UInt32 pdwVolume);
[DllImport("Winmm.dll")]
private static extern uint waveOutGetVolume(int hwo, out System.UInt32 pdwVolume);
private const int volumeMinScope = 0;
private const int volumeMaxScope = 100;
private int lastVolume = 0;
private int volume = 100;
public int Volume
{
get { return volume; }
set
{
volume = value;
AudioSlider.value = volume;
SetCurrentVolume();
}
}
private void SetCurrentVolume()
{
volume = volume < volumeMinScope ? volumeMinScope : volume;
volume = volume > volumeMaxScope ? volumeMaxScope : volume;
//先把trackbar的value值映射到0x0000～0xFFFF范围
System.UInt32 Value = (System.UInt32)((double)0xffff * volume / (volumeMaxScope - volumeMinScope));
//限制value的取值范围
Value = Value < 0 ? 0 : Value;
Value = Value > 0xffff ? 0xffff : Value;
print(volume);
System.UInt32 left = Value; //左声道音量
System.UInt32 right = Value; //右声道音量
waveOutSetVolume(0, left << 16 | right); //"<<"左移，“|”逻辑或运算
}
/// <summary>
/// 改变程序音量，增加
/// </summary>
/// <param name="value">增加的幅度</param>
public void ProgramVolumeUp(int value = 2)
{
Volume += value;
}
/// <summary>
/// 改变程序音量，减少
/// </summary>
/// <param name="value">减少的幅度</param>
public void ProgramVolumeDown(int value = 2)
{
Volume -= value;
}
/// <summary>
/// 改成程序音量，静音
/// </summary>
public void ProgramMute()
{
int temp = lastVolume;
lastVolume = volume;
Volume = temp;
}
#endregion
public enum MangerType
{
Program,
System,
}
public MangerType mangerType = MangerType.Program;
public Slider AudioSlider;
uint i = 0;
void Start()
{
AudioSlider.maxValue = volumeMaxScope;
MessageManager.RecviveMessage("Audio", (kv) =>
{
if (kv.Key.Contains("add"))
{
SystemVolumeUp();
}
else if (kv.Key.Contains("minish"))
{
SystemVolumeDown();
}
//SliderUp();
//CancelInvoke();
//Invoke("SliderDown",3);
});
}
void SliderUp()
{
AudioSlider.GetComponent<RectTransform>().DOAnchorPosY(70, 2);
}
void SliderDown()
{
AudioSlider.GetComponent<RectTransform>().DOAnchorPosY(-70, 2);
}
private void Update()
{
switch (mangerType)
{
case MangerType.Program:
if (Input.GetKeyDown(KeyCode.UpArrow))
ProgramVolumeUp();
if (Input.GetKeyDown(KeyCode.DownArrow))
ProgramVolumeDown();
if (Input.GetKeyDown(KeyCode.Space))
ProgramMute();
break;
case MangerType.System:
if (Input.GetKeyDown(KeyCode.UpArrow))
SystemVolumeUp();
if (Input.GetKeyDown(KeyCode.DownArrow))
SystemVolumeDown();
if (Input.GetKeyDown(KeyCode.Space))
SystemMute();
break;
}
}
}

复制代码