Split File Wav em VB6

votos
0

Preciso de ajuda para corrigir o código VB6 em anexo, que é suposto ter um arquivo de áudio e dividi-lo em 5 partes iguais.

Esta é a forma como este código deve funcionar:

A primeira parte começa a partir do início do arquivo Track.wav. A segunda parte começa a partir de onde a primeira parte dividida terminou. A terceira parte começa a partir de onde a segunda parte dividida terminou. A quarta parte começa a partir de onde a terceira parte dividida terminou. A quinta parte começa a partir de onde a quarta parte de divisão terminou.

Essencialmente cada uma das partes do arquivo é uma continuação da parte anterior da divisão de arquivo. Após a separação tenho 1.wav, 2.wav, 3.wav. 4.wav e 5.wav todos derivados de um arquivo Track.wav. O código já anexado divide o arquivo em cinco partes iguais, mas o problema é que todas as partes de áudio são o mesmo que a primeira parte, em vez de uma continuação.

Preciso de ajuda para obter este fixo para o trabalho como deveria em VB6 (não .NET). Eu ficaria grato por sua ajuda com isso.

Dim Wavlength As Integer

Private Sub Command1_Click()

On Error Resume Next

DoFirstWav

Me.SetFocus

End Sub

Private Sub DoFirstWav()

On Error Resume Next

Dim ByteData() As Byte
Dim FirstWav As Integer

FirstWav = Wavlength / 5

ByteData = ReadFile(App.Path & \Track.wav, 1, FirstWav & 0000)
Call WriteFile(App.Path & \Segments\1.wav, ByteData)

DoSecondWav

End Sub

Private Sub DoSecondWav()

On Error Resume Next

Dim ByteData() As Byte
Dim SecondWav As Integer

SecondWav = Wavlength / 5

ByteData = ReadFile(App.Path & \Track.wav, 1, SecondWav & 0000)
Call WriteFile(App.Path & \Segments\2.wav, ByteData)

DoThirdWav

End Sub

Private Sub DoThirdWav()

On Error Resume Next

Dim ByteData() As Byte
Dim ThirdWav As Integer

ThirdWav = Wavlength / 5

ByteData = ReadFile(App.Path & \Track.wav, 1, ThirdWav & 0000)
Call WriteFile(App.Path & \Segments\3.wav, ByteData)

DoFourthWav

End Sub

Private Sub DoFourthWav()

On Error Resume Next

Dim ByteData() As Byte
Dim FourthWav As Integer

FourthWav = Wavlength / 5

ByteData = ReadFile(App.Path & \Track.wav, 1, FourthWav & 0000)
Call WriteFile(App.Path & \Segments\4.wav, ByteData)

DoFifthWav

End Sub

Private Sub DoFifthWav()

On Error Resume Next

Dim ByteData() As Byte
Dim FifthWav As Integer

FifthWav = Wavlength / 5

ByteData = ReadFile(App.Path & \Track.wav, 1, FifthWav & 0000)
Call WriteFile(App.Path & \Segments\5.wav, ByteData)

MsgBox Wav Split Successfully, vbInformation

End

End Sub

Private Function ReadFile(ByVal strFileName As String, Optional ByVal lngStartPos As Long = 1, Optional ByVal lngFileSize As Long = -1) As Byte()

On Error Resume Next

Dim FilNum As Integer

FilNum = FreeFile

Open strFileName For Binary As #FilNum
    If lngFileSize = -1 Then
        ReDim ReadFile(LOF(FilNum) - lngStartPos)
        Else
        ReDim ReadFile(lngFileSize - 1)
    End If
    Get #FilNum, lngStartPos, ReadFile
Close #FilNum

End Function

Private Function WriteFile(ByVal strFileName As String, ByteData() As Byte, Optional ByVal lngStartPos As Long = -1, Optional ByVal OverWrite As Boolean = True)

On Error Resume Next

Dim FilNum As Integer

FilNum = FreeFile

If OverWrite = True And Dir(strFileName) <>  Then
    Kill strFileName
End If

Open strFileName For Binary As #FilNum
    If lngStartPos = -1 Then
        Put #FilNum, LOF(FilNum) + 1, ByteData
        Else
        Put #FilNum, l, ByteData
    End If
Close #FilNum

End Function

Private Sub Form_Load()

On Error Resume Next

Dim MyInt As Integer
Dim MyByte As Byte
Dim MyStr As String * 4
Dim MyLong As Long
Dim SampleRate, BytesPerSample, FileSize As Long

Open App.Path & \Track.wav For Binary Access Read Lock Read As #1
    Get #1, , MyStr:    Debug.Print Riff = ; MyStr
    Get #1, , MyLong:   Debug.Print File size = ; MyLong
    FileSize = MyLong
    Get #1, , MyStr:    Debug.Print Wave = ; MyStr
    Get #1, , MyStr:    Debug.Print Format = ; MyStr
    Get #1, , MyLong:   Debug.Print Any = ; MyLong
    Get #1, , MyInt:    Debug.Print formatTag = ; MyInt
    Get #1, , MyInt:    Debug.Print Channels = ; MyInt
    Get #1, , MyLong:   Debug.Print Samples per Sec = ; MyLong
    SampleRate = MyLong
    Get #1, , MyInt:    Debug.Print Bytes per Sec = ; MyInt
    Get #1, , MyInt:    Debug.Print BlockAlign = ; MyInt
    Get #1, , MyInt:    Debug.Print Bytes per Sample = ; MyInt
    BytesPerSample = MyInt
Close #1

Wavlength = FileSize / (SampleRate * BytesPerSample)

End Sub
Publicado 14/02/2020 em 00:01
fonte usuário
Em outras línguas...                            


2 respostas

votos
1

Esta questão é bastante envolvidos, especialmente se cada parte precisa ser jogável. A razão é que cada arquivo que você cria precisa ter um registro de cabeçalho válido. Para complicar ainda mais, aparece um registo de cabeçalho pode ser 44 bytes, 46 bytes, ou mesmo de outros tamanhos.

Eu trabalhei para fora de um código básico com base em seu post que parece trabalho para o arquivo WAV que eu testei:

Option Explicit

Private Const HEADER_SIZE As Long = 46
Private Const CHUNK_COUNT As Long = 5

Private HeaderData(HEADER_SIZE) As Byte
Private ChunkSize As Long

Private Sub Form_Load()
   Dim MyInt As Integer
   Dim MyByte As Byte
   Dim MyStr As String * 4
   Dim MyLong As Long
   Dim FileSize As Long

   Open App.Path & "\Track.wav" For Binary Access Read Lock Read As #1
   Get #1, , MyStr:    Debug.Print "Riff = "; MyStr
   Get #1, , MyLong:   Debug.Print "File size = "; MyLong
   Get #1, , MyStr:    Debug.Print "Wave = "; MyStr
   Get #1, , MyStr:    Debug.Print "Format = "; MyStr
   Get #1, , MyLong:   Debug.Print "Any = "; MyLong
   Get #1, , MyInt:    Debug.Print "formatTag = "; MyInt
   Get #1, , MyInt:    Debug.Print "Channels = "; MyInt
   Get #1, , MyLong:   Debug.Print "Samples per Sec = "; MyLong
   Get #1, , MyInt:    Debug.Print "Bytes per Sec = "; MyInt
   Get #1, , MyInt:    Debug.Print "BlockAlign = "; MyInt
   Get #1, , MyInt:    Debug.Print "Bytes per Sample = "; MyInt
   Get #1, , MyInt:    Debug.Print "Something = "; MyInt  'for my wave file, I needed 2 extra bytes
   Get #1, , MyStr:    Debug.Print "SubchunkID = "; MyStr
   Get #1, , FileSize: Debug.Print "SubchunkSize = "; FileSize
   Get #1, 1, HeaderData  'the size changes depending upon the file
   Close #1

   ChunkSize = CLng(FileSize / CHUNK_COUNT)  'you might loose some data here
End Sub

Private Sub Command1_Click()
   Dim i As Integer
   Dim ByteData() As Byte
   Dim StartPos As Long

   For i = 1 To CHUNK_COUNT
      StartPos = HEADER_SIZE + ((i - 1) * ChunkSize)
      ByteData = ReadFile(App.Path & "\Track.wav", StartPos, ChunkSize)
      Call WriteFile(App.Path & "\Segments\" & i & ".wav", HeaderData, ByteData)
   Next

   MsgBox "Wav Split Successfully", vbInformation
   End
End Sub

Private Function ReadFile(ByVal strFileName As String, ByVal lngStartPos As Long, ByVal lngFileSize As Long) As Byte()
   On Error Resume Next

   Dim FilNum As Integer

   FilNum = FreeFile

   ReDim ReadFile(lngFileSize - 1)

   Open strFileName For Binary As #FilNum

   Get #FilNum, lngStartPos, ReadFile

   Close #FilNum
End Function

Private Function WriteFile(ByVal strFileName As String, HeaderData() As Byte, ByteData() As Byte, Optional ByVal OverWrite As Boolean = True)
   On Error Resume Next

   Dim FilNum As Integer

   FilNum = FreeFile

   If OverWrite = True And Dir(strFileName) <> "" Then
       Kill strFileName
   End If

   Open strFileName For Binary As #FilNum

   Put #FilNum, LOF(FilNum) + 1, HeaderData
   Put #FilNum, HEADER_SIZE, ByteData

   Close #FilNum
End Function

I eliminado um monte de código duplicado através da implementação de um Forloop. Nesse loop, eu calcular a posição inicial para a leitura, e também passar o registro de cabeçalho para o Write.

Mais uma vez, gostaria de salientar que este é muito básico e não vai funcionar para todos os arquivos WAV. Você pode ajustar manualmente o header_size se ele não funciona para o seu arquivo.

Provavelmente as necessidades de registro de cabeçalho para ser modificada para refletir o tamanho correto do novo arquivo, em vez de usar o cabeçalho do arquivo original.

Isso deve ajudar a começar.

Respondeu 17/02/2020 em 00:25
fonte usuário

votos
0

Este é o código de trabalho. Tenho certeza que alguém pode precisar de algo como este no futuro, si pensei que eu ia postar aqui.


Dim Wavlength As Long
Dim PartLength As Integer
Dim WavHeader() As Byte

Private Sub Command1_Click()

On Error Resume Next

WavHeader = ReadFile(App.Path & "\Track.wav", 1, 320)

PartLength = Wavlength / 6 - 2

DoFirstWav

End Sub

Private Sub DoFirstWav()

On Error Resume Next

Dim ByteData() As Byte
Dim FirstWav As Integer

ByteData = ReadFile(App.Path & "\Track.wav", 1, PartLength & "0000")
Call WriteFile(App.Path & "\Segments\1.wav", ByteData)

DoSecondWav

End Sub

Private Sub DoSecondWav()

On Error Resume Next

Dim ByteData() As Byte
Dim ByteRead() As Byte
Dim SecondWav As Integer

SecondWav = PartLength

ByteRead = ReadFile(App.Path & "\Track.wav", SecondWav & "0000", PartLength & "0000")

ReDim ByteData(UBound(WavHeader) + UBound(ByteRead)) As Byte

For i = 0 To UBound(WavHeader)
    ByteData(i) = WavHeader(i)
Next i

For i = 0 To UBound(ByteRead)
    ByteData(UBound(WavHeader) + i) = ByteRead(i)
Next i

Call WriteFile(App.Path & "\Segments\2.wav", ByteData)

DoThirdWav

End Sub

Private Sub DoThirdWav()

On Error Resume Next

Dim ByteData() As Byte
Dim ByteRead() As Byte
Dim ThirdWav As Integer

ThirdWav = PartLength * 2 + 1

ByteRead = ReadFile(App.Path & "\Track.wav", ThirdWav & "0000", PartLength & "0000")

ReDim ByteData(UBound(WavHeader) + UBound(ByteRead)) As Byte

For i = 0 To UBound(WavHeader)
    ByteData(i) = WavHeader(i)
Next i

For i = 0 To UBound(ByteRead)
    ByteData(UBound(WavHeader) + i) = ByteRead(i)
Next i

Call WriteFile(App.Path & "\Segments\3.wav", ByteData)

DoFourthWav

End Sub

Private Sub DoFourthWav()

On Error Resume Next

Dim ByteData() As Byte
Dim ByteRead() As Byte
Dim FourthWav As Integer

FourthWav = PartLength * 3 + 1

ByteRead = ReadFile(App.Path & "\Track.wav", FourthWav & "0000", PartLength & "0000")

ReDim ByteData(UBound(WavHeader) + UBound(ByteRead)) As Byte

For i = 0 To UBound(WavHeader)
    ByteData(i) = WavHeader(i)
Next i

For i = 0 To UBound(ByteRead)
    ByteData(UBound(WavHeader) + i) = ByteRead(i)
Next i

Call WriteFile(App.Path & "\Segments\4.wav", ByteData)

DoFifthWav

End Sub

Private Sub DoFifthWav()

On Error Resume Next

Dim ByteData() As Byte
Dim ByteRead() As Byte
Dim FifthWav As Integer

FifthWav = PartLength * 4 + 1

ByteRead = ReadFile(App.Path & "\Track.wav", FifthWav & "0000", PartLength & "0000")

ReDim ByteData(UBound(WavHeader) + UBound(ByteRead)) As Byte

For i = 0 To UBound(WavHeader)
    ByteData(i) = WavHeader(i)
Next i

For i = 0 To UBound(ByteRead)
    ByteData(UBound(WavHeader) + i) = ByteRead(i)
Next i

Call WriteFile(App.Path & "\Segments\5.wav", ByteData)

End Sub

Private Function ReadFile(ByVal strFileName As String, Optional ByVal lngStartPos As Long = 1, Optional ByVal lngFileSize As Long = -1) As Byte()

On Error Resume Next

Dim FilNum As Integer

FilNum = FreeFile

Open strFileName For Binary As #FilNum
    If lngFileSize = -1 Then
        ReDim ReadFile(LOF(FilNum) - lngStartPos)
        Else
        ReDim ReadFile(lngFileSize - 1)
    End If
    Get #FilNum, lngStartPos, ReadFile
Close #FilNum

End Function

Private Function WriteFile(ByVal strFileName As String, ByteData() As Byte, Optional ByVal lngStartPos As Long = -1, Optional ByVal OverWrite As Boolean = True)

On Error Resume Next

Dim FilNum As Integer

FilNum = FreeFile

If OverWrite = True And Dir(strFileName) <> "" Then
    Kill strFileName
End If

Open strFileName For Binary As #FilNum
    If lngStartPos = -1 Then
        Put #FilNum, LOF(FilNum) + 1, ByteData
        Else
        Put #FilNum, l, ByteData
    End If
Close #FilNum

End Function

Private Sub Form_Load()

On Error Resume Next

Dim MyInt As Integer
Dim MyByte As Byte
Dim MyStr As String * 4
Dim MyLong As Long
Dim SampleRate, BytesPerSample, FileSize As Long

Open App.Path & "\Track.wav" For Binary Access Read Lock Read As #1
    Get #1, , MyStr:    Debug.Print "Riff = "; MyStr
    Get #1, , MyLong:   Debug.Print "File size = "; MyLong
    FileSize = MyLong
    Get #1, , MyStr:    Debug.Print "Wave = "; MyStr
    Get #1, , MyStr:    Debug.Print "Format = "; MyStr
    Get #1, , MyLong:   Debug.Print "Any = "; MyLong
    Get #1, , MyInt:    Debug.Print "formatTag = "; MyInt
    Get #1, , MyInt:    Debug.Print "Channels = "; MyInt
    Get #1, , MyLong:   Debug.Print "Samples per Sec = "; MyLong
    SampleRate = MyLong
    Get #1, , MyInt:    Debug.Print "Bytes per Sec = "; MyInt
    Get #1, , MyInt:    Debug.Print "BlockAlign = "; MyInt
    Get #1, , MyInt:    Debug.Print "Bytes per Sample = "; MyInt
    BytesPerSample = MyInt

Close #1

Wavlength = FileSize \ (SampleRate * BytesPerSample)

Debug.Print "Wavlength"; Wavlength

End Sub
Respondeu 18/02/2020 em 01:41
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