VB 多种格式的音乐播放模块

Public Declare Function mciSendString Lib "winmm.dll" Alias "mciSendStringA" (ByVal lpstrCommand As String, ByVal lpstrReturnString As String, ByVal uReturnLength As Long, ByVal hwndCallback As Long) As Long

Public Declare Function mciGetDeviceID Lib "winmm.dll" Alias "mciGetDeviceIDA" (ByVal lpstrName As String) As Long

Public Declare Function waveOutGetVolume Lib "winmm.dll" (ByVal uDeviceID As Long, lpdwVolume As Long) As Long

Public Declare Function GetWindowLong Lib "USER32" Alias "GetWindowLongA" (ByVal Hwnd As Long, ByVal nIndex As Long) As Long

Public Declare Function CallWindowProc Lib "USER32" Alias "CallWindowProcA" (ByVal lpPrevWndFunc As Long, ByVal Hwnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long

Public Declare Function SetWindowLong Lib "USER32" Alias "SetWindowLongA" (ByVal Hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long

Public Declare Function GetShortPathName Lib "kernel32" Alias "GetShortPathNameA" (ByVal lpszLongPath As String, ByVal lpszShortPath As String, ByVal cchBuffer As Long) As Long

Enum PlayTypeName
File = 1
CDAudio = 2
VCD = 3
RealPlay = 4
End Enum
Dim PlayType As PlayTypeName
Enum AudioSource
H = 0 ' "stereo"
L = 1 '"left"
R = 2 '"right"
End Enum
Enum Playstate
停止 = 1
暂停 = 2
播放 = 3
End Enum
Dim hWndMusic As Long
Dim prevWndproc As Long


'打开MCI设备，FILENAME为文件名,传值代表成功与否
Public Function OpenMusic(FileName As String, Optional Hwnd As Long) As Boolean
OpenMusic = False
Dim ShortPathName As String * 255
Dim RefShortName As String
Dim RefInt As Long
Dim MciCommand As String
Dim DriverID As String

CloseMusic '关闭 已经打开的歌曲 才可以打开新的歌曲
'获取短文件名
GetShortPathName FileName, ShortPathName, 255
RefShortName = Left(ShortPathName, InStr(1, ShortPathName, Chr(0)) - 1)
'MCI命令
DriverID = GetDriverID(RefShortName)
If DriverID = "RealPlayer" Then
PlayType = RealPlay
Exit Function
End If
MciCommand = "open " & RefShortName & " type " & DriverID & " alias NOWMUSIC"

'根据不同的格式加载不同的解码器

If DriverID = "AVIVideo" Or DriverID = "MPEGVideo" Or DriverID = "MPEGVideo2" Then
If Hwnd <> 0 Then
MciCommand = MciCommand + " parent " & Hwnd & " style child"
hWndMusic = GetWindowHandle
prevWndproc = GetWindowLong(hWndMusic, -4)
SetWindowLong hWndMusic, -4, AddressOf WndProc
Else
MciCommand = MciCommand + " style overlapped "
End If
End If

RefInt = mciSendString(MciCommand, vbNull, 0, 0)
mciSendString "set NOWMUSIC time format milliseconds", vbNullString, 0, 0
If RefInt = 0 Then
OpenMusic = True
LrcForm.LRC1.Sotp '关闭 已经打开的歌词
SongName = Trim$(Mid$(FileName, InStrRev(FileName, "\") + 1, Len(FileName))) & " " '滤除前面的路径
Naccuracy = 0 '还原歌词调整值 为 0
End If
End Function
Function WndProc(ByVal Hwnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
If Msg = &H202 Then
MsgBox "OK"
End If
WndProc = CallWindowProc(prevWndproc, Hwnd, Msg, wParam, lParam)
End Function

'根据文件名，确定设备
Public Function GetDriverID(ff As String) As String
Select Case UCase(Right(ff, 3))
Case "MID", "RMI", "IDI"
GetDriverID = "Sequencer"
Case "WAV"
GetDriverID = "Waveaudio"
Case "ASX", "IVF", "LSF", "LSX", "P2V", "WAX", "WVX", ".WM", "WMX", "WMP"
GetDriverID = "MPEGVideo2"
Case ".RM", "RAM", ".RA", "MVB"
GetDriverID = "RealPlayer"
Case Else
GetDriverID = "MPEGVideo"
End Select
End Function


'播放文件
Public Function PlayMusic() As Boolean
Dim RefInt As Long
PlayMusic = False
RefInt = mciSendString("play NOWMUSIC", vbNull, 0, 0)
If RefInt = 0 Then
PlayMusic = True: DownloadLrc '加载 或下 载歌词
SetVolume ((Mian.Button1(6).Left - 660)) / 640 * 1000 '计算当前音量大小 '最大为1000
'检测播放速度 800 慢 1200 快
If menu.SpeedDown.Checked Then SetSpeed 800
If menu.SpeedUp.Checked Then SetSpeed 1200
'检测声道 默认 立体
If menu.AudioLeft.Checked Then SetAudioSource L '左声道
If menu.AudioRight.Checked Then SetAudioSource R
End If
End Function


'获取媒体的长度
Public Function GetMusicLength() As Long
Dim RefStr As String * 80
mciSendString "status NOWMUSIC length", RefStr, 80, 0
GetMusicLength = Val(RefStr)
End Function

'获取媒体的长度 00:00
Public Function GetMusicLengthString() As String
Dim RefStr As String * 80
mciSendString "status NOWMUSIC length", RefStr, 80, 0
GetMusicLengthString = CStr(Format(Int(Val(RefStr) \ 1000 \ 60), "00") & "：" & Format(Val(RefStr) \ 1000 Mod 60, "00.") & Val(RefStr) \ 100 Mod 10)
End Function
'设置当前播放进度条的长度 最长是 1980

Public Function HScrollWidth() As Long
Dim RefStr As String * 80
mciSendString "status NOWMUSIC position", RefStr, 80, 0
If Int(Val(RefStr)) <= 0 Then HScrollWidth = 1980: Exit Function
HScrollWidth = 1980 / GetMusicLength * Val(RefStr) ' * 1980
End Function
'设置当前播放进度条的长度和播放位置

Public Sub HScrollValue(Value As Single)
SetMusicPos ((1980 - (4240 - Value)) / 1980 * GetMusicLength) ' * Val(RefStr) ' * 1980
End Sub

'获取当前播放进度 毫秒
Public Function GetMusicPos() As Long
Dim RefStr As String * 80
mciSendString "status NOWMUSIC position", RefStr, 80, 0
GetMusicPos = Val(RefStr)
End Function

'获取当前播放进度 格式 00：00.0
Public Function GetMusicPosString() As String
Dim RefStr As String * 80
mciSendString "status NOWMUSIC position", RefStr, 80, 0
GetMusicPosString = CStr(Format(Int(Val(RefStr) \ 1000 \ 60), "00") & "：" & Format(Val(RefStr) \ 1000 Mod 60, "00.") & Val(RefStr) \ 100 Mod 10)
End Function

'获取媒体的当前进度
Public Function SetMusicPos(Position As Long) As Boolean
Dim RefInt As Long
SetMusicPos = False
RefInt = mciSendString("seek NOWMUSIC to " & Position, vbNull, 0, 0)
If RefInt = 0 Then PlayMusic: SetMusicPos = True
End Function

'暂停播放
Public Function PauseMusic() As Boolean
Dim RefInt As Long
PauseMusic = False
RefInt = mciSendString("pause NOWMUSIC", vbNull, 0, 0)
If RefInt = 0 Then PauseMusic = True
End Function

'关闭媒体
Public Function CloseMusic() As Boolean
Dim RefInt As Long
CloseMusic = False
RefInt = mciSendString("close NOWMUSIC", vbNull, 0, 0)
If RefInt = 0 Then CloseMusic = True
End Function

'全屏播放
Public Function PlayFullScreen() As Boolean
Dim RefInt As Long
PlayFullScreen = False
RefInt = mciSendString("play NOWMUSIC fullscreen", vbNull, 0, 0)
If RefInt = 0 Then PlayFullScreen = True
End Function

'设置声音大小
Public Function SetVolume(Volume As Long) As Boolean
Dim RefInt As Long
SetVolume = False
RefInt = mciSendString("setaudio NOWMUSIC volume to " & Volume, vbNull, 0, 0)
If RefInt = 0 Then SetVolume = True
End Function
'设置声道
'======================================================
Public Function SetAudioSource(sAudioSource As AudioSource) As Boolean
Dim RefInt As Long
Dim strSource As String
Select Case sAudioSource
Case 1: strSource = "left"
Case 2: strSource = "right"
Case 0: strSource = "stereo"
End Select
SetAudioSource = False
RefInt = mciSendString("setaudio NOWMUSIC source to " & strSource, vbNull, 0, 0)
If RefInt = 0 Then SetAudioSource = True
End Function

'设置播放速度
Public Function SetSpeed(Speed As Long) As Boolean
Dim RefInt As Long
SetSpeed = False
RefInt = mciSendString("set NOWMUSIC speed " & Speed, vbNull, 0, 0)
If RefInt = 0 Then SetSpeed = True
End Function

'静音True为静音，FALSE为取消静音
Public Function SetAudioOnOff(AudioOff As Boolean) As Boolean
Dim RefInt As Long
Dim OnOff As String
SetAudioOff = False
If AudioOff Then OnOff = "off" Else OnOff = "on"
RefInt = mciSendString("setaudio NOWMUSIC " & OnOff, vbNull, 0, 0)
If RefInt = 0 Then SetAudioOff = True
End Function

'获得当前媒体的状态是不是在播放
Public Function IsPlaying() As Playstate
Dim sl As String * 255
mciSendString "status NOWMUSIC mode", sl, Len(sl), 0
'MsgBox sl
If Left(sl, 7) = "playing" Or Left(sl, 2) = "播放" Then
IsPlaying = 播放
ElseIf Left(sl, 7) = "stopped" Or Left(sl, 2) = "停止" Then
IsPlaying = 停止
Else
IsPlaying = 暂停
End If
End Function

'获得播放窗口的handle
Public Function GetWindowHandle() As Long
Dim RefStr As String * 160
mciSendString "status NOWMUSIC window handle", RefStr, 80, 0
GetWindowHandle = Val(RefStr)
End Function

'获取DeviceID
Public Function GetDeviceID() As Long
GetDeviceID = mciGetDeviceID("NOWMUSIC")
End Function