I'm trying to enumerate all the different formats for a specific format type, but every time i run the acmFormatEnum function it returns MMSYSERR_INVALPARAM meaning "At least one parameter is invalid.". Anyone know how to use that function? Anyone have some examples? All help is greatly appreciated, here's my code. I start by running the TagEnum function:

ACMFORMATTAGDETAILS acmTagDetails;

void TagEnum()
{
HACMDRIVER hAcm;

acmDriverOpen(&hAcm, id, 0);

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

acmDriverClose(hAcm, 0);

}

BOOL WINAPI acmTagCallback(HACMDRIVERID hadid, LPACMFORMATTAGDETAILS paftd, DWORD dwInstance,DWORD fdwSupport)
{
ACMFORMATDETAILS acmFormat;
WAVEFORMATEX waveFormat = { 0 };
HACMDRIVER hAcm;

memset(&acmFormat, 0, sizeof(acmFormat));
acmFormat.cbStruct = sizeof(acmFormat);
acmFormat.cbwfx = sizeof(waveFormat);
acmFormat.pwfx = &waveFormat;
acmFormat.dwFormatTag = acmTagDetails.dwFormatTag;

waveFormat.wFormatTag = acmTagDetails.dwFormatTag;

acmDriverOpen(&hAcm, hadid, 0);
acmFormatEnum(hAcm, &acmFormat, formatCallback, NULL, ACM\_FORMATENUMF\_WFORMATTAG);
acmDriverClose(hAcm, 0);

return TRUE;

}

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;

}

id is a HACMDRIVERID holding a valid driver id of a driver. Anyone have a clue what could be wrong or have some examples? All help is apprecaited. -Rune Svendsen

When i try to compile a program, VirtualDub actually (www.virtualdub.com), it says that INVALID_SET_FILE_POINTER is an unknown identifier. Accoring to MSDN it's defined in winbase.h (include windows.h) but when i search for that phrase (INVALID_SET_FILE_POINTER) in my include folder, no results are found. Anyone know what could be wrong? Thanks

Are they sent to my email or what? cause my email address is runes@hotpop.com

Sure, can i get your email address?

It's a WAVEFORMATEX structure used to restrict the formats showed, so only 16-bits per sample formats are showed in the list.

I just tried to run some code i got directly from MSDN, non-modified, but at the acmFormatChoose line it gives me a message about a "breakpoint called from code at 0xXXXXXX", anyone have a clue what's wrong?

MMRESULT mmr;
ACMFORMATCHOOSE afc;
WAVEFORMATEX wfxSelection;
WAVEFORMATEX wfxEnum;

// Initialize the ACMFORMATCHOOSE members.
memset(&afc, 0, sizeof(afc));

afc.cbStruct = sizeof(afc);
afc.fdwStyle = 0L; // no special style flags
afc.hwndOwner = ghWnd; // hwnd of parent window
afc.pwfx = &wfxSelection; // wfx to receive selection
afc.cbwfx = sizeof(wfxSelection);
afc.pszTitle = TEXT("16 Bit PCM Selection");

// Request that all 16-bit PCM formats be displayed for the user
// to select from.
memset(&wfxEnum, 0, sizeof(wfxEnum));

wfxEnum.wFormatTag = WAVE_FORMAT_PCM;
wfxEnum.wBitsPerSample = 16;

afc.fdwEnum = ACM_FORMATENUMF_WFORMATTAG | ACM_FORMATENUMF_WBITSPERSAMPLE;
afc.pwfxEnum = &wfxEnum;

mmr = acmFormatChoose(&afc);
if ((MMSYSERR_NOERROR != mmr) && (ACMERR_CANCELED != mmr))
{
// There was a fatal error in bringing up the list
// dialog box (probably invalid input parameters).
}

Thankyou in advance. -Rune Svendsen

I have some code where i try to display a dialog box where a user can choose a specific format. I've filled all the parts of the struct that needs to be filled accoring to the MSDN, but still i get an unhandled exception when running the function. Here's my code:

ACMFORMATCHOOSE acmChoose;
WAVEFORMATEX fmtChoose = { 0 };

acmChoose.pwfx = &fmtChoose;
acmChoose.cbwfx = sizeof(fmtChoose);
acmChoose.cbStruct = sizeof(acmChoose);
acmChoose.hwndOwner = ghWnd;

acmFormatChoose(&acmChoose);

Where ghWnd is a valid handle to my main window. Anyone know what could be wrong? Thankyou all, all input is appreciated. -Rune Svendsen

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;

void StartEnum()
{
HACMDRIVER hAcm;

acmDriverOpen(&hAcm, id, 0);

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

acmDriverClose(hAcm, 0);

}

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;

}

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

umm, not sure if it makes much sense, but this is the contens of it when the message appears: NTDLL! 77f9f9df() NTDLL! 77fb4966() NTDLL! 77fb3bdc() NTDLL! 77fa7131() NTDLL! 77fca4cb() MSMS001! 01ac7b68() MSMS001! 01ac7539() MSMS001! 01abfcf7() VCT3216! 01254326()

1. I have tried removing everything from the callback function except return true;, and when i do that the messagebox doesn't appear, but in the Debug fan (the one where there's Build, Debug, Find In Files 1 etc.) it says First-chance exception in MP3.exe (MSACM32.DLL): 0xC0000005: Access Violation. First-chance exception in MP3.exe (MSACM32.DLL): 0xC0000005: Access Violation. (yes, the statement is shown twice) 2. The line where i call the function that uses the callback function is as follows:

acmDriverEnum(listCallback, NULL, ACM_DRIVERENUMF_DISABLED);

The prototype of the callback is:

BOOL WINAPI listCallback (HACMDRIVERID hadid, DWORD dwInstance, DWORD fdwSupport);

but that is actually not the original callback function definition, it's like this:

BOOL ACMDRIVERENUMCB acmDriverEnumCallback(HACMDRIVERID hadid, DWORD dwInstance, DWORD fdwSupport);

the reason i changed it was that it wouldn't compile when i used ACMDRIVERENUMCB, a lot of compile errors showed. so i asked what could be wrong and one said that maby ACMDRIVERENUMCB was just a typedef of WINAPI so i used that, could that be where the problem lies? Thanks for your help.

Sorry for my ignorance, but what is the call stack and how to i review it? Thanks.

I get this error when using acmDriverEnum to enumerate all the different codecs on my system, this is the callback function:

BOOL WINAPI listCallback(HACMDRIVERID hadid, DWORD dwInstance, DWORD fdwSupport)
{
if (fdwSupport & ACMDRIVERDETAILS_SUPPORTF_CODEC)
{
ACMDRIVERDETAILS details;

	details.cbStruct = sizeof(details);

	acmDriverDetails(hadid, &details, NULL);

	SendMessage(GetDlgItem(ghWnd, IDC\_CODECS), LB\_INSERTSTRING, 0, (LPARAM)details.szLongName);
}

return true;

}

In this routine i simply check if the current driver is a codec, and if it is i add the name of it to a listbox. The error happens when i have looped though all of the different codecs and the return true; statement has been executed. After that it jumps to some assembly code, and this is the stament it gives me the message after completing:

call dword ptr [ebp+8]

When that statement has been executed, the "User breakpoint called from code at 0x77f9f9df" message appears, and it jumps to this statement:

int 3

I've never experienced this message before and i haven't got a clue what it means. All help appreciated. -Rune Svendsen

What does that mean? The messagebox appears and it goes into assembly debugging, i'm trying to enumerate all the available compression driver on the system, here's the code:

void onConvert()
{
acmDriverEnum((ACMDRIVERENUMCB)listCallback, NULL, ACM_DRIVERENUMF_DISABLED);
}

BOOL WINAPI listCallback(HACMDRIVERID hadid, DWORD dwInstance, DWORD fdwSupport)
{
if (fdwSupport == ACMDRIVERDETAILS_SUPPORTF_CODEC)
{
ACMDRIVERDETAILS details;
int box;
int test;
details.cbStruct = sizeof(details);

	box = acmDriverDetails(hadid, &details, NULL);

	SendMessage(GetDlgItem(ghWnd, IDC\_CODECS), LB\_ADDSTRING, 0, (LPARAM)details.szLongName);
}

return true;

}

First i call the onConvert and then it uses the listCallback function to enumerate the different drivers. Thanks in advance -Redeemer

Thankyou! Solved it all!

I'm making a list of all the available audio decoders in the system by calling acmDriverEnum, but i get some compile errors that i can't figure out how to get rid of, here's the callback prototype:

BOOL ACMDRIVERENUMCB listCallback(HACMDRIVERID hadid, DWORD dwInstance, DWORD fdwSupport);

and here's the callback function (not finished yet, i just want it to compile):

BOOL ACMDRIVERENUMCB listCallback(HACMDRIVERID hadid, DWORD dwInstance, DWORD fdwSupport)
{
if (fwdSupport == ACMDRIVERDETAILS_SUPPORTF_CODEC)
{
ACMDRIVERDETAILS details;

	acmDriverDetails(hadid, &details, 0);
}

}

these are the compile errors i get: e:\mp3organizer\convertaudio\main.h(5) : error C2146: syntax error : missing ';' before identifier 'listCallback' e:\mp3organizer\convertaudio\main.h(5) : error C2377: 'ACMDRIVERENUMCB' : redefinition; typedef cannot be overloaded with any other symbol e:\program files\microsoft visual studio\vc98\include\msacm.h(250) : see declaration of 'ACMDRIVERENUMCB' e:\mp3organizer\convertaudio\main.h(5) : fatal error C1004: unexpected end of file found All help appreciated, thankyou.

Anyone know a good ACM audio compression turorial? Thanks in advance.

I'm trying to show an Open File dialog but it won't show and i can't figure out what i'm doing wrong, here's the code:

{
OPENFILENAME ofn;
char szFileNames[(MAX_PATH+1)*1000+2];
const char szFilter[] = "MP3 Files (*.mp3)\0" "*.mp3\0";

szFileNames\[0\] = 0;
ofn.lStructSize = sizeof(OPENFILENAME);

ofn.hwndOwner = ghWnd;
ofn.lpstrFilter = szFilter;
ofn.lpstrCustomFilter = (LPSTR)NULL;
ofn.nFilterIndex = 1;
ofn.lpstrFile = szFileNames;
ofn.nMaxFile = sizeof(szFileNames);
ofn.lpstrFileTitle = NULL;
ofn.lpstrTitle = (LPSTR)NULL;
ofn.Flags = OFN\_ENABLESIZING | OFN\_FILEMUSTEXIST | OFN\_HIDEREADONLY | OFN\_PATHMUSTEXIST | OFN\_ALLOWMULTISELECT | OFN\_EXPLORER;
ofn.nFileOffset = 0;
ofn.nFileExtension = 0;
ofn.lpstrDefExt = "mp3";

GetOpenFileName(&ofn);

Thanks in advance -Rune Svendsen

WHen i try to compile a program including commdlg.h i get 102 compiling errors. almost everyone of them are because of undeclared identifiers like APIENTRY, UINT and DWORD. i don't understand why it gives me so many errors and why it can't recognize DWORD and UINT. what's wrong?

Thanks, it was the lpstrInitialDir.

here's the code, when i get to the GetOpenFileName line it gives me an unhandled exception, i can't figure out what's wrong, here's the code:

void OnBrowse()
{
OPENFILENAME ofn;
char szFileName[MAX_PATH+1];
const char szFilter[] = "All Files (*.*)\0" "*.*\0";

szFileName\[0\] = '\\0';
ofn.lStructSize = sizeof(OPENFILENAME);

ofn.hwndOwner = ghWnd;
ofn.lpstrFilter = szFilter;
ofn.lpstrCustomFilter = (LPSTR)NULL;
ofn.nFilterIndex = 1;
ofn.lpstrFile = szFileName;
ofn.nMaxFile = sizeof(szFileName);
ofn.lpstrFileTitle = NULL;
ofn.lpstrTitle = (LPSTR)NULL;
ofn.Flags = OFN\_ENABLESIZING | OFN\_FILEMUSTEXIST | OFN\_HIDEREADONLY | OFN\_PATHMUSTEXIST | OFN\_EXPLORER;
ofn.nFileOffset = 0;
ofn.nFileExtension = 0;
ofn.lpstrDefExt = "txt";


if (GetOpenFileName(&ofn))
	SetDlgItemText(ghWnd, IDC\_LIST, szFileName);

}

Thanks in advance. -Rune Svendsen