C / C++ / MFC

How do i use acmFormatEnum? All help is appreciated!

13-Aug-02 9:26

udayGovekar wrote:
what should be done to provide the resize option to user for modeless dialog

http://www.codeproject.com/dialog/resizabledialog.asp[^]

Tomasz Sowinski -- http://www.shooltz.com

What is "scratch" and why can everything be made from it?

redeemer13-Aug-02 9:10

redeemer

13-Aug-02 9:10

I'm trying to enumerate all the different formats of a specific driver but acmFormatEnum keeps returning MMSYSERR_INVALPARAM (At least one parameter is invalid.). Anyone have an example of how to do this? Here's my code (id is a valid driver identifier of a driver):

ACMFORMATTAGDETAILS acmTagDetails;
<br>
void StartEnum()
{
	HACMDRIVER hAcm;

	acmDriverOpen(&hAcm, id, 0);
	
	acmTagDetails.cbStruct = sizeof(ACMFORMATTAGDETAILS);
	acmFormatTagEnum(hAcm, &acmTagDetails, acmTagCallback, NULL, 0);

	acmDriverClose(hAcm, 0);
}
<br>

BOOL WINAPI acmTagCallback(HACMDRIVERID hadid, LPACMFORMATTAGDETAILS paftd, DWORD dwInstance,DWORD fdwSupport)
{
	ACMFORMATDETAILS acmFormat;
	HACMDRIVER hAcm;

	memset(&acmFormat, 0, sizeof acmFormat);
	acmFormat.cbStruct = sizeof(ACMFORMATDETAILS);
	acmMetrics(NULL, ACM_METRIC_MAX_SIZE_FORMAT, &acmFormat.cbwfx);
	acmFormat.pwfx = (WAVEFORMATEX *)malloc(acmFormat.cbwfx);

	acmDriverOpen(&hAcm, hadid, 0);
	acmFormatEnum(hAcm, &acmFormat, formatCallback, NULL, ACM_FORMATENUMF_WFORMATTAG);
	acmDriverClose(hAcm, 0);

	return TRUE;
}
<br>

BOOL WINAPI formatCallback(HACMDRIVERID hadid, LPACMFORMATDETAILS pafd, DWORD dwInstance, DWORD fdwSupport)
{
	ACMDRIVERDETAILS details;

	details.cbStruct = sizeof(details);

	acmDriverDetails(hadid, &details, NULL);

	SendMessage(GetDlgItem(ghWnd, IDC_FORMATS), LB_INSERTSTRING, 0, (LPARAM)details.szLongName);

	return TRUE;
}

Thanks for your help!

-Rune Svendsen

Re: How do i use acmFormatEnum? All help is appreciated!

Ernest Laurentin13-Aug-02 10:46

Ernest Laurentin

13-Aug-02 10:46

You have to many members not initialized in acmTagCallback. MSDN says that for ACM_FORMATENUMF_WFORMATTAG, you must initialized dwFormatTag member of the ACMFORMATDETAILS structure must be equal to the wFormatTag member of WAVEFORMATEX. By the way, you need to free the memory you allocate with malloc or you may want to use a local variable : WAVEFORMATEX waveFormat = { 0 }; and assign it to acmFormat.pwfx = &wafeFormat; You still need to initialize wafeFormat with the format that you are looking
for. An 8Khz, 8-bit, 1 channel may be your starting point. Sorry if I don't have code to show you right now!
Good luck

VOTD:"5. The Lord loves righteousness and justice;
the Earth is full of his unfailing love. "-Psalm 33:5

Re: How do i use acmFormatEnum? All help is appreciated!

Ernest Laurentin14-Aug-02 17:40

Ernest Laurentin

14-Aug-02 17:40

Try to initialize your WAVEFORMATEX struct with this function:

void InitFormat(LPWAVEFORMATEX pwfx, WORD wChannel, DWORD dwSamplesPerSec, WORD wBitsPerSample)
{
_ASSERTE( NULL != pwfx );
pwfx->cbSize = sizeof(WAVEFORMATEX);
pwfx->wFormatTag = WAVE_FORMAT_PCM;
pwfx->nChannels = wChannel;
pwfx->nSamplesPerSec = dwSamplesPerSec;
pwfx->nAvgBytesPerSec = dwSamplesPerSec * wChannel * (wBitsPerSample>>3);
pwfx->wBitsPerSample = wBitsPerSample;
pwfx->nBlockAlign = wChannel * (wBitsPerSample>>3);
}

VOTD:"5 I know that the Lord is great, that our Lord is greater than all gods.
6 The Lord does whatever pleases him, in the heavens and on the earth, in the seas and all their depths."- Psalm 135:5-6

COleSafeArray

Mazdak13-Aug-02 9:08

Mazdak

13-Aug-02 9:08

Something drive me tired and crazy.I want to put ten sting into COleSafeArray.Could someone pleaseeee give me a sample code?

Mazy

"If I go crazy then will you still
Call me Superman
If I’m alive and well, will you be
There holding my hand
I’ll keep you by my side with
My superhuman might
Kryptonite"Kryptonite-3 Doors Down

Re: COleSafeArray

Ernest Laurentin13-Aug-02 10:06

Ernest Laurentin

13-Aug-02 10:06

COleSafeArray saVector;
SAFEARRAYBOUND rgsabound[1];
rgsabound[0].lLbound = 0;
rgsabound[0].cElements = 10;

// creates a 1 dimensional safearray of type VT_BSTR
// with size 10 elements, with the index starting at 0
saVector.Create(VT_BSTR, 1, rgsabounds);
long index;
_bstr_t val = "Your string"; // or inside of the loop
for(index=0; index<10; index++)
{
  saVector.PutElement(index, (const WCHAR*)val);
}

VOTD:"5. The Lord loves righteousness and justice;
the Earth is full of his unfailing love. "-Psalm 33:5

char representation of a double

senorbuckwheat13-Aug-02 8:22

senorbuckwheat

13-Aug-02 8:22

Hi,

I am looking for a way to convert a double to the char representation, ie. put double, which is eight bytes, to char[8];
Example:

double nDb = 12.34;
char szDb[8];

szdB would hold the character representation of nDb which might look something like:
[0] 0''
[1] 0''
[2] 0''
[3] 0''
[4] 0''
[5] 0''
[6] 51'3'
[7] 64'@'

Thank you.

Re: char representation of a double

C^hris L^osinger13-Aug-02 8:30

C^hris L^osinger

13-Aug-02 8:30

try snprintf

-c

Conservative:
One who admires radicals centuries after they're dead.
-- Leo C. Rosten

image effects!

Re: char representation of a double

Tomasz Sowinski13-Aug-02 8:31

modal dialog range checking

13-Aug-02 8:31

memcpy(szDb, &nDB, sizeof(double));

or, if you want to save keystrokes

(double & )szDb = nDb;

Tomasz Sowinski -- http://www.shooltz.com

What is "scratch" and why can everything be made from it?

jimNLX13-Aug-02 8:19

13-Aug-02 8:19

I call a modal dialog to input a number. The var that i added to the class has limits but these don't get checked until the calling (parent) dialog closes. Is there an option that I need to set or do i need to range ckeck on my own?

This is my call:

if(GetNumDlg.DoModal() == IDOK)
{

calleddialog = 0;

m_leftscale = atoi(GetNumDlg.m_numdisplayed);
UpdateData(FALSE);

//This will set the focus to another control to keep this dialog from popping up
//everytime focus returns
//

CEdit* pNextField = (CEdit*)GetDlgItem(IDOK); pNextField->SetFocus();

}

Tomasz Sowinski13-Aug-02 8:21

13-Aug-02 8:21

Can't you map your edit control to int variable with range validation? You can do this in ClassWizard.

Tomasz Sowinski -- http://www.shooltz.com

What is "scratch" and why can everything be made from it?

jimNLX13-Aug-02 8:23

13-Aug-02 8:23

that is where I set the var up and I did use the range checking for it...just doest seem to check it until I try to exit the calling window.\thanks

Tomasz Sowinski13-Aug-02 8:28

13-Aug-02 8:28

I'm not really sure what exactly are you doing. In the code you've posted you have atoi call. This means that your dialog has string variable, not integer one.

Tomasz Sowinski -- http://www.shooltz.com

What is "scratch" and why can everything be made from it?

jimNLX13-Aug-02 8:43

13-Aug-02 8:43

This is where the problem lies. This is a pop up number entry keyboard. I have two vars one is a string and the other is the integer. I use the string to create the number...make any sence?

Tomasz Sowinski13-Aug-02 9:13

13-Aug-02 9:13

Do you have range validation in GetNumDlg?

Tomasz Sowinski -- http://www.shooltz.com

What is "scratch" and why can everything be made from it?

jimNLX13-Aug-02 9:28

13-Aug-02 9:28

calleddialog = 1;
if(GetNumDlg.DoModal() == IDOK)
{

calleddialog = 0;

m_rightscale = atoi(GetNumDlg.m_numdisplayed);
UpdateData(FALSE);

m_rightscale is where the value (int) is placed and returned to the edit box. This var is setup in the wizzard with a range. I'm thinking that I need another var in the getnumdlg to check the range on.

Thanks for the help...

Tomasz Sowinski13-Aug-02 9:30