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I may be starting an application before long which will receive digital audio streams, and then run these streams through an algorithm before passing the streams back out of the application (sort of a filter). I've not really processed digital audio streams before, and I'd like a reference to begin with. I am best with C++, but I'm not against using some other language like BASIC if it is necessary, but I'd prefer to stick with what I am the most comfortable with. If anybody has experience with receiving and processing digital audio streams, could you please guide me with a book or two that would be a good starting point to learn from? I'd greatly appreciate it. Thank you!!!  
Douglas A. Wright
dawrigh3@kent.edu
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If you are doing this on a Win32 platform. You should probably look at DirectX DirectShow. If you download the SDK there are a bunch of Audio Filter Examples. DirectX has a comprehensive framework for encoding, decoding and transcoding media streams.
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I am trying to write a Win32 WinSock app and nothing is working! winsock2.h by itself gives me 70 errors (and i linked the lib file). winsock 1 refuses to let me use SOCKADDR_IN, so what is going on?
-- Steve
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Include ws2tcpip.h.
Kuphryn
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Hi,
In my program I keep getting this error whenever I move my dialog or, OnOK and OnCancel.
It says:
Debug Assertion Failed.
File: winctrl2.cpp
Line: 1202
In winctrl2.cpp I have gone to the line 1202:
BOOL CImageList::Attach(HIMAGELIST hImageList)
{
1202: ASSERT(m_hImageList == NULL); // only attach once, detach on destroy
ASSERT(FromHandlePermanent(hImageList) == NULL);
if (hImageList == NULL)
return FALSE;
CHandleMap* pMap = afxMapHIMAGELIST(TRUE);
ASSERT(pMap != NULL);
pMap->SetPermanent(m_hImageList = hImageList, this);
return TRUE;
}
It has something to do with the ImgaeList that I added to the Tree control in my program.
I added the tree control like this:
m_nTree.SetImageList(&m_ImageList, TVSIL_NORMAL);
In ONOK and OnCancel I even added following line:
m_ImageList.Detach();
Still I keep getting the assertion error.
Can anybody help please?
Thanks,
Binayak
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You attach the Imagelist to the tree control more than once.
if you attach a imagelist to the tree ,the m_HImageList will not be NULL, if you attach again ,the ASSERT(m_HImageList==NULL) will break, so you should init the tree imagelist in the OnInitDialog() and don't init again.
I think is it.
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Hi,
I'm sure I attached to the tree control only once and that is in the onInitDialog().
Still this is not working. Any other suggestions?
Thanks,
Binayak
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You could try to protect the adding of the image list with a bool variable:
In your dialog, add a bool variable firstTime, set to true in constructor.
Modify the part where you add the imagelist to look like this:
if (firstTime)
{
m_Tree.SetImageList(&m_TreeImageList, TVSIL_NORMAL);
firstTime = false;
}Additionally, I think you can drop the calls to detach(), as this will be done automagically when the tree goes away.
Who is 'General Failure'? And why is he reading my harddisk?!?
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Hi,
Thanks for your reply.
I tried doing what you said.
But, in this case also if I try to move my dialog box, I keep getting the same error (debug assertions failed)
I'm including call stack and part of code with this:
Call stack: shows line 140 which is shown in the code.
L! 77f9180c()
_CrtDbgReport(int 2, const char * 0x5f4cd0c0 THIS_FILE, int 1202, const char * 0x00000000, const char * 0x00000000) line 353
AfxAssertFailedLine(const char * 0x5f4cd0c0 THIS_FILE, int 1202) line 39 + 20 bytes
CImageList::Attach(_IMAGELIST * 0x00141e70) line 1202 + 24 bytes
CImageList::Create(unsigned int 131, int 13, int 1, unsigned long 16777215) line 1183
CMfcTree::OnInitDialog() line 140
AfxDlgProc(HWND__ * 0x01f31c2e, unsigned int 272, unsigned int 18619602, unsigned int 18619602) line 35 + 14 bytes
USER32! 77e3a244()
USER32! 77e28b4b()
USER32! 77e2d2b2()
USER32! 77e16b21()
USER32! 77e16b44()
CWnd::DefWindowProcA(unsigned int 272, unsigned int 18619602, long 0) line 1000 + 32 bytes
CWnd::Default() line 249
CDialog::HandleInitDialog(unsigned int 18619602, unsigned int 18619602) line 624 + 8 bytes
CWnd::OnWndMsg(unsigned int 272, unsigned int 18619602, long 0, long * 0x001294b4) line 1815 + 17 bytes
CWnd::WindowProc(unsigned int 272, unsigned int 18619602, long 0) line 1585 + 30 bytes
AfxCallWndProc(CWnd * 0x00129838, HWND__ * 0x01f31c2e, unsigned int 272, unsigned int 18619602, long 0) line 215 + 26 bytes
AfxWndProc(HWND__ * 0x01f31c2e, unsigned int 272, unsigned int 18619602, long 0) line 368
AfxWndProcBase(HWND__ * 0x01f31c2e, unsigned int 272, unsigned int 18619602, long 0) line 220 + 21 bytes
USER32! 77e3a244()
USER32! 77e16362()
USER32! 77e29c20()
USER32! 77e2caa8()
USER32! 77e2ca6b()
CWnd::CreateDlgIndirect(const DLGTEMPLATE * 0x00437c30, CWnd * 0x002f70e8 {CTempWnd hWnd=0x03541c1c}, HINSTANCE__ * 0x00400000) line 327 + 36 bytes
CDialog::DoModal() line 531 + 32 bytes
CMyTreeView::OnDraw(CDC * 0x00129b30) line 61 + 11 bytes
CView::OnPaint() line 185
CWnd::OnWndMsg(unsigned int 15, unsigned int 0, long 0, long * 0x00129ca4) line 1825
CWnd::WindowProc(unsigned int 15, unsigned int 0, long 0) line 1585 + 30 bytes
AfxCallWndProc(CWnd * 0x002f4fc8, HWND__ * 0x09c71a58, unsigned int 15, unsigned int 0, long 0) line 215 + 26 bytes
AfxWndProc(HWND__ * 0x09c71a58, unsigned int 15, unsigned int 0, long 0) line 368
AfxWndProcBase(HWND__ * 0x09c71a58, unsigned int 15, unsigned int 0, long 0) line 220 + 21 bytes
USER32! 77e3a244()
USER32! 77e14730()
USER32! 77e1558a()
NTDLL! 77f91a7f()
USER32! 77e1a792()
USER32! 77e43ed5()
USER32! 77e33f6a()
USER32! 77e34306()
USER32! 77e337fb()
USER32! 77e34091()
USER32! 77e3322c()
__crtMessageBoxA(const char * 0x0012a3ec, const char * 0x102579a0 `string', unsigned int 73746) line 65
CrtMessageWindow(int 2, const char * 0x5f4cd0c0 THIS_FILE, const char * 0x0012b520, const char * 0x00000000, const char * 0x0012d544) line 520 + 22 bytes
_CrtDbgReport(int 2, const char * 0x5f4cd0c0 THIS_FILE, int 1202, const char * 0x00000000, const char * 0x00000000) line 419 + 76 bytes
AfxAssertFailedLine(const char * 0x5f4cd0c0 THIS_FILE, int 1202) line 39 + 20 bytes
CImageList::Attach(_IMAGELIST * 0x0013f750) line 1202 + 24 bytes
CImageList::Create(unsigned int 131, int 13, int 1, unsigned long 16777215) line 1183
CMfcTree::OnInitDialog() line 140
AfxDlgProc(HWND__ * 0x00da1d1e, unsigned int 272, unsigned int 15998044, unsigned int 15998044) line 35 + 14 bytes
USER32! 77e3a244()
USER32! 77e28b4b()
USER32! 77e2d2b2()
USER32! 77e16b21()
USER32! 77e16b44()
CWnd::DefWindowProcA(unsigned int 272, unsigned int 15998044, long 0) line 1000 + 32 bytes
CWnd::Default() line 249
CDialog::HandleInitDialog(unsigned int 15998044, unsigned int 15998044) line 624 + 8 bytes
CWnd::OnWndMsg(unsigned int 272, unsigned int 15998044, long 0, long * 0x0012e894) line 1815 + 17 bytes
CWnd::WindowProc(unsigned int 272, unsigned int 15998044, long 0) line 1585 + 30 bytes
AfxCallWndProc(CWnd * 0x0012ec18, HWND__ * 0x00da1d1e, unsigned int 272, unsigned int 15998044, long 0) line 215 + 26 bytes
AfxWndProc(HWND__ * 0x00da1d1e, unsigned int 272, unsigned int 15998044, long 0) line 368
AfxWndProcBase(HWND__ * 0x00da1d1e, unsigned int 272, unsigned int 15998044, long 0) line 220 + 21 bytes
USER32! 77e3a244()
USER32! 77e16362()
USER32! 77e29c20()
USER32! 77e2caa8()
USER32! 77e2ca6b()
CWnd::CreateDlgIndirect(const DLGTEMPLATE * 0x00437c30, CWnd * 0x0012f858, HINSTANCE__ * 0x00400000) line 327 + 36 bytes
CDialog::DoModal() line 531 + 32 bytes
CMyTreeView::OnDraw(CDC * 0x0012ef10) line 61 + 11 bytes
CView::OnPaint() line 185
CWnd::OnWndMsg(unsigned int 15, unsigned int 0, long 0, long * 0x0012f084) line 1825
CWnd::WindowProc(unsigned int 15, unsigned int 0, long 0) line 1585 + 30 bytes
AfxCallWndProc(CWnd * 0x002f4fc8, HWND__ * 0x09c71a58, unsigned int 15, unsigned int 0, long 0) line 215 + 26 bytes
AfxWndProc(HWND__ * 0x09c71a58, unsigned int 15, unsigned int 0, long 0) line 368
AfxWndProcBase(HWND__ * 0x09c71a58, unsigned int 15, unsigned int 0, long 0) line 220 + 21 bytes
USER32! 77e3a244()
USER32! 77e14730()
USER32! 77e1558a()
NTDLL! 77f91a7f()
USER32! 77e2917a()
USER32! 77e2d2b2()
USER32! 77e16b21()
USER32! 77e16b44()
CWnd::DefWindowProcA(unsigned int 274, unsigned int 61458, long 328197) line 1000 + 32 bytes
CWnd::WindowProc(unsigned int 274, unsigned int 61458, long 328197) line 1586 + 26 bytes
AfxCallWndProc(CWnd * 0x0012f858, HWND__ * 0x01d519fa, unsigned int 274, unsigned int 61458, long 328197) line 215 + 26 bytes
AfxWndProc(HWND__ * 0x01d519fa, unsigned int 274, unsigned int 61458, long 328197) line 368
AfxWndProcBase(HWND__ * 0x01d519fa, unsigned int 274, unsigned int 61458, long 328197) line 220 + 21 bytes
USER32! 77e3a244()
USER32! 77e14730()
USER32! 77e1558a()
NTDLL! 77f91a7f()
USER32! 77e2917a()
USER32! 77e2d2b2()
USER32! 77e16b21()
USER32! 77e16b44()
CWnd::DefWindowProcA(unsigned int 161, unsigned int 2, long 328197) line 1000 + 32 bytes
CWnd::WindowProc(unsigned int 161, unsigned int 2, long 328197) line 1586 + 26 bytes
AfxCallWndProc(CWnd * 0x0012f858, HWND__ * 0x01d519fa, unsigned int 161, unsigned int 2, long 328197) line 215 + 26 bytes
AfxWndProc(HWND__ * 0x01d519fa, unsigned int 161, unsigned int 2, long 328197) line 368
AfxWndProcBase(HWND__ * 0x01d519fa, unsigned int 161, unsigned int 2, long 328197) line 220 + 21 bytes
USER32! 77e3a244()
USER32! 77e145e5()
USER32! 77e15b51()
CWnd::RunModalLoop(unsigned long 4) line 3478 + 19 bytes
CDialog::DoModal() line 539 + 12 bytes
CMyTreeView::OnDraw(CDC * 0x0012fb50) line 61 + 11 bytes
CView::OnPaint() line 185
CWnd::OnWndMsg(unsigned int 15, unsigned int 0, long 0, long * 0x0012fcc4) line 1825
CWnd::WindowProc(unsigned int 15, unsigned int 0, long 0) line 1585 + 30 bytes
AfxCallWndProc(CWnd * 0x002f4fc8, HWND__ * 0x09c71a58, unsigned int 15, unsigned int 0, long 0) line 215 + 26 bytes
AfxWndProc(HWND__ * 0x09c71a58, unsigned int 15, unsigned int 0, long 0) line 368
AfxWndProcBase(HWND__ * 0x09c71a58, unsigned int 15, unsigned int 0, long 0) line 220 + 21 bytes
USER32! 77e3a244()
USER32! 77e14730()
USER32! 77e1558a()
NTDLL! 77f91a7f()
CTreeApp::InitInstance() line 96
AfxWinMain(HINSTANCE__ * 0x00400000, HINSTANCE__ * 0x00000000, char * 0x00132a08, int 1) line 39 + 11 bytes
WinMain(HINSTANCE__ * 0x00400000, HINSTANCE__ * 0x00000000, char * 0x00132a08, int 1) line 30
WinMainCRTStartup() line 330 + 54 bytes
KERNEL32! 77ea847c()
code:
BOOL CMfcTree::OnInitDialog()
{
CDialog::OnInitDialog();
m_ImageList.Create(IDB_BITMAP1, 13, 1, RGB(255,255,255));
if ( firstTime ) //line 140
{
m_nTree.SetImageList(&m_ImageList, TVSIL_NORMAL);
firstTime = false;
}
HTREEITEM hItem = m_nTree.InsertItem( "Root", 0,2,TVI_ROOT );
m_nTree.SelectItem (hItem);
for (int count =0 ; count <15 ; count ++)
{
OnBUTTONAddA() ;
m_nTree.SelectItem (hItem);
}
m_nTree.SelectItem (hItem);
showRoot();
m_nAddA.ShowWindow ( SW_HIDE );
//XML
//XML
return TRUE; // return TRUE unless you set the focus to a control
// EXCEPTION: OCX Property Pages should return FALSE
}
Binayak Bhattacharyya
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Hmm.
Seems like your imagelist creation is failing?
Please check the return value of m_ImageList.Create(..).
Nonzero is signaling an error.
Who is 'General Failure'? And why is he reading my harddisk?!?
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I have checked the return value of Create(...)
It's true.
any other suggestions?
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Hello,
Sorry for my c++ stupid question but i really forgot to get the size of an array in a func 
typedef struct<br />
{<br />
char *item;<br />
int top;<br />
int bottom;<br />
} Item;<br />
<br />
<br />
void Draw( Item* item )<br />
{<br />
<br />
int nSize = sizeof(*item) / sizeof(Item);<br />
<br />
}<br />
<br />
main()<br />
{<br />
Item array[] = { ... };<br />
Draw( array );<br />
}
Any idea ?
Best Regards,
Hadi
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You can't do that. The array is actually passed into the function as a pointer, not as an array. This means that sizeof(item) will always be 4. Instead you should either pass through the size of the array as a separate parameter, or even better, use an STL container such as a vector, which includes its size within the container itself.
Dave
http://www.cloudsofheaven.org
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Thanks alot for reply Dave 
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Here is my thought about your array:
The elements can be linked together,so it is a link list, is it
Maximal index of your array can be used to count the array's size
why do you want to count it in that way?
Here are two ways to find the size of the array
1.Add a function to count the size by using the property of link list like the following:
CountSize(Ietm array)
{
int count=1;
while(array->item!=NULL)
{
count++;
array->item=array->item->item;
}
return count;
}
2.Get the size directly by its maximal index
Maybe it is not very OK.
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The best advice one can give is to call std::vector::size().
[plugSTL]
This would mean that you need to switch to the STL-vectors, but that would be a good idea anyway.
[/plugSTL]
Who is 'General Failure'? And why is he reading my harddisk?!?
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Could someone please tell me how to make the background of a dialog a bitmap? I am using MFC on VC++ 6.0.
<marquee>Hosam Aly Mahmoud
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Take a look at this.
HPS HwndSpy - GUI developer's aid to visually
locate and inspect windows. For the month of August
only, use coupon code CP-81239 for 30% off.
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Thank you very much!
<marquee behavior="alternate">Hosam Aly Mahmoud
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like this:
void CAaDlg::OnPaint()
{
if (IsIconic())
{
CPaintDC dc(this); // device context for painting
SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);
// Center icon in client rectangle
int cxIcon = GetSystemMetrics(SM_CXICON);
int cyIcon = GetSystemMetrics(SM_CYICON);
CRect rect;
GetClientRect(&rect);
int x = (rect.Width() - cxIcon + 1) / 2;
int y = (rect.Height() - cyIcon + 1) / 2;
// Draw the icon
dc.DrawIcon(x, y, m_hIcon);
}
else
{
CRect rect;
GetClientRect(&rect);
CPaintDC dc(this);
CBitmap bitmap;
BITMAP Bitmap;
bitmap.LoadBitmap(IDB_BITMAP1);
bitmap.GetObject(sizeof(BITMAP),&Bitmap);
CDC dcMem;
dcMem.CreateCompatibleDC(&dc);
CBitmap* poldbitmap=dcMem.SelectObject(&bitmap);
dc.StretchBlt(0,0,rect.Width(),rect.Height(),
&dcMem,0,0,Bitmap.bmWidth,Bitmap.bmHeight,SRCCOPY);
dcMem.SelectObject(poldbitmap);
dcMem.DeleteDC();
}
}
void CAaDlg::OnSize(UINT nType, int cx, int cy)
{
CDialog::OnSize(nType, cx, cy);
// TODO: Add your message handler code here
Invalidate(TRUE);
}
may be useful!
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Thank you for your reply. But shouldn't this be handled in the WM_ERASEBKGND message (or the corresponding OnEraseBkgnd function)? Which one is better?
Thank you again.
<marquee behavior="alternate">Hosam Aly Mahmoud
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Could you please tell me how to know how much free physical RAM exists on a system at a certain time? Also, if I have a process that allocates RAM using new, is there a way to guarantee that the allocated RAM does not go into the virtual memory, but rather stay in the physical RAM until I delete it (or the process ends)?
Sorry for my language, and thanks for your help.
<marquee behavior="alternate">Hosam Aly Mahmoud
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GlobalMemoryStatus() and VirtualLock()
John
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Thank you very much. The GlobalMemoryStatus() is great. But I could not understand VirtualLock(). Could you kindly help me with it?
<marquee behavior="alternate">Hosam Aly Mahmoud
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