frmdsptest.frm

bass player system api c++

VERSION 5.00
Object = "{F9043C88-F6F2-101A-A3C9-08002B2F49FB}#1.2#0"; "comdlg32.ocx"
Begin VB.Form frmDSPtest 
   BorderStyle     =   3  'Fixed Dialog
   Caption         =   "BASS simple DSP test"
   ClientHeight    =   1185
   ClientLeft      =   45
   ClientTop       =   435
   ClientWidth     =   4515
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   1185
   ScaleWidth      =   4515
   StartUpPosition =   2  'CenterScreen
   Begin VB.CheckBox chkSwap 
      Caption         =   "swap"
      Height          =   315
      Left            =   3360
      TabIndex        =   4
      Top             =   720
      Width           =   855
   End
   Begin VB.CheckBox chkFlange 
      Caption         =   "flanger"
      Height          =   315
      Left            =   2280
      TabIndex        =   3
      Top             =   720
      Width           =   855
   End
   Begin VB.CheckBox chkEcho 
      Caption         =   "echo"
      Height          =   315
      Left            =   1200
      TabIndex        =   2
      Top             =   720
      Width           =   735
   End
   Begin MSComDlg.CommonDialog cmd 
      Left            =   3960
      Top             =   0
      _ExtentX        =   847
      _ExtentY        =   847
      _Version        =   393216
   End
   Begin VB.CheckBox chkRotate 
      Caption         =   "rotate"
      Height          =   315
      Left            =   240
      TabIndex        =   1
      Top             =   720
      Width           =   735
   End
   Begin VB.CommandButton cmdOpen 
      Caption         =   "click here to open a file..."
      Height          =   375
      Left            =   120
      TabIndex        =   0
      Top             =   120
      Width           =   4335
   End
End
Attribute VB_Name = "frmDSPtest"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
'////////////////////////////////////////////////////////////////////////////////
' frmDSPtest.frm - Copyright (c) 2003-2007 (: JOBnik! :) [Arthur Aminov, ISRAEL]
'                                                        [http://www.jobnik.org]
'                                                        [  [e-mail]  ]
'
' Other source: modDSPtest.bas
'
' BASS simple DSP test
' Originally translated from - dsptest.c - Example of Ian Luck
'////////////////////////////////////////////////////////////////////////////////

Option Explicit
 
' display error messages
Sub Error_(ByVal es As String)
    Call MsgBox(es & vbCrLf & vbCrLf & "error code: " & BASS_ErrorGetCode, vbExclamation, "Error")
End Sub

Private Sub Form_Load()
    ' change and set the current path, to prevent from VB not finding BASS.DLL
    ChDrive App.Path
    ChDir App.Path

    ' check the correct BASS was loaded
    If (HiWord(BASS_GetVersion) <> BASSVERSION) Then
        Call MsgBox("An incorrect version of BASS.DLL was loaded", vbCritical)
        End
    End If

    ' enable floating-point DSP
    Call BASS_SetConfig(BASS_CONFIG_FLOATDSP, BASSTRUE)

    ' initialize - default device
    If (BASS_Init(-1, 44100, 0, Me.hWnd, 0) = 0) Then
        Call Error_("Can't initialize device")
        Unload Me
    End If

    ' check for floating-point capability
    floatable = BASS_StreamCreate(44100, 2, BASS_SAMPLE_FLOAT, 0, 0)
    If (floatable) Then     ' woohoo!
        Call BASS_StreamFree(floatable)
        floatable = BASS_SAMPLE_FLOAT
    End If

    rotdsp = 0
    echdsp = 0
    fladsp = 0
    swpdsp = 0
End Sub

Private Sub Form_Unload(Cancel As Integer)
     Call BASS_Free
End Sub

' toggle "rotate"
Private Sub chkRotate_Click()
    If (chkRotate.value = vbChecked) Then
        rotpos = 0.7853981
        rotdsp = BASS_ChannelSetDSP(chan, AddressOf Rotate, 0, 3)
    Else
        Call BASS_ChannelRemoveDSP(chan, rotdsp)
    End If
End Sub

' toggle "echo"
Private Sub chkEcho_Click()
    If (chkEcho.value = vbChecked) Then
        echpos = 0
        echdsp = BASS_ChannelSetDSP(chan, AddressOf Echo, 0, 2)
    Else
        Call BASS_ChannelRemoveDSP(chan, echdsp)
    End If
End Sub

' toggle "flanger"
Private Sub chkFlange_Click()
    If (chkFlange.value = vbChecked) Then
        flapos = 0
        flas = FLABUFLEN / 2
        flasinc = 0.002
        fladsp = BASS_ChannelSetDSP(chan, AddressOf Flange, 0, 1)
    Else
        Call BASS_ChannelRemoveDSP(chan, fladsp)
    End If
End Sub

' toggle "swapper"
Private Sub chkSwap_Click()
    If (chkSwap.value = vbChecked) Then
        swpdsp = BASS_ChannelSetDSP(chan, AddressOf Swapper, 0, 0)
    Else
        Call BASS_ChannelRemoveDSP(chan, swpdsp)
    End If
End Sub

Private Sub cmdOpen_Click()
    On Local Error Resume Next    ' if Cancel pressed...

    cmd.CancelError = True
    cmd.flags = cdlOFNExplorer Or cdlOFNFileMustExist Or cdlOFNHideReadOnly
    cmd.DialogTitle = "Open"
    cmd.Filter = "playable files|*.mo3;*.xm;*.mod;*.s3m;*.it;*.mtm;*.umx;*.mp3;*.mp2;*.mp1;*.ogg;*.wav;*.aif|All files|*.*"
    cmd.ShowOpen

    ' if cancel was pressed, exit the procedure
    If Err.Number = 32755 Then Exit Sub

    ' free both MOD and stream, it must be one of them! :)
    Call BASS_MusicFree(chan)
    Call BASS_StreamFree(chan)

    chan = BASS_StreamCreateFile(BASSFALSE, StrPtr(cmd.filename), 0, 0, BASS_SAMPLE_LOOP Or floatable)
    If (chan = 0) Then chan = BASS_MusicLoad(BASSFALSE, StrPtr(cmd.filename), 0, 0, BASS_MUSIC_LOOP Or BASS_MUSIC_RAMPS Or floatable, 0)

    ' whatever it is, it ain't playable
    If (chan = 0) Then
        cmdOpen.Caption = "click here to open a file..."
        Call Error_("Can't play the file")
        Exit Sub
    End If

    Dim info As BASS_CHANNELINFO
    Call BASS_ChannelGetInfo(chan, info)

    If (info.chans <> 2) Then ' only stereo is allowed
        cmdOpen.Caption = "click here to open a file..."
        Call BASS_MusicFree(chan)
        Call BASS_StreamFree(chan)
        Call Error_("only stereo sources are supported")
        Exit Sub
    End If
    
    cmdOpen.Caption = GetFileName(cmd.filename)
    
    ' setup DSPs on new channel
    chkRotate_Click
    chkEcho_Click
    chkFlange_Click
    chkSwap_Click
    
    ' play it!
    Call BASS_ChannelPlay(chan, BASSFALSE)
End Sub

'--------------------
' useful function :)
'--------------------

' get file name from file path
Public Function GetFileName(ByVal fp As String) As String
    GetFileName = Mid(fp, InStrRev(fp, "\") + 1)
End Function