wavesee.frm

显示wav文件波形图,用于wav文件分析研究.

VERSION 5.00
Object = "{F9043C88-F6F2-101A-A3C9-08002B2F49FB}#1.2#0"; "comdlg32.ocx"
Begin VB.Form WaveSee 
   Caption         =   "Form1"
   ClientHeight    =   6315
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   10620
   LinkTopic       =   "Form1"
   ScaleHeight     =   6315
   ScaleWidth      =   10620
   StartUpPosition =   3  '窗口缺省
   Begin MSComDlg.CommonDialog dlgGetFile 
      Left            =   2040
      Top             =   5520
      _ExtentX        =   847
      _ExtentY        =   847
      _Version        =   393216
   End
   Begin VB.PictureBox Picture1 
      Appearance      =   0  'Flat
      AutoRedraw      =   -1  'True
      BackColor       =   &H80000005&
      ForeColor       =   &H80000008&
      Height          =   5295
      Left            =   0
      ScaleHeight     =   5265
      ScaleWidth      =   10545
      TabIndex        =   1
      Top             =   120
      Width           =   10575
   End
   Begin VB.CommandButton Command1 
      Caption         =   "Command1"
      Height          =   375
      Left            =   0
      TabIndex        =   0
      Top             =   5520
      Width           =   1695
   End
End
Attribute VB_Name = "WaveSee"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Sub Command1_Click()
    Dim sFileName As String
    Dim hRIFF     As RIFFHead
    Dim hWAVE     As WAVEHead
    Dim hWAVEEx   As WAVEHeadEx
    Dim fn
    Dim WData()   As Byte
    
    dlgGetFile.Filter = "*.wav"
    dlgGetFile.ShowOpen
    sFileName = dlgGetFile.FileName
    If sFileName = "" Then Exit Sub
    
    fn = FreeFile()
    Open sFileName For Binary Access Read Shared As #fn
        Get #fn, , hRIFF
        If hRIFF.WaveHeadSize = 16 Then
            Get #fn, , hWAVE
            ReDim WData(0 To hWAVE.DataSize - 1)
            k = hWAVE.DataSize - 1
        Else
            Get #fn, , hWAVEEx
            ReDim WData(0 To hWAVEEx.DataSize - 1)
            k = hWAVEEx.DataSize - 1
        End If
        Get #fn, , WData
    Close #fn
    Picture1.Scale (0, 256)-(k, 0)
    Picture1.Cls
    For i = 0 To k
        Picture1.Line -(i, WData(i))
    Next i
End Sub