C / C++ / MFC

Re: problem with mmsystem.h

15-Feb-02 8:09

Sorry but I don't know which part of the code I have to give you so I prefer to give you the all thing...
SORRY FOR THE INCONVENIENCE

#include "stdafx.h"
#include "mci.h"

//////////////////////////////////////////////////////////////////////////
// CMciDevice implementation
//

// Common Modes
const DWORD CMciDevice::ModeNotReady = MCI_MODE_NOT_READY;
const DWORD CMciDevice::ModePause = MCI_MODE_PAUSE;
const DWORD CMciDevice::ModePlay = MCI_MODE_PLAY;
const DWORD CMciDevice::ModeStop = MCI_MODE_STOP;
const DWORD CMciDevice::ModeOpen = MCI_MODE_OPEN;
const DWORD CMciDevice::ModeRecord = MCI_MODE_RECORD;
const DWORD CMciDevice::ModeSeek = MCI_MODE_SEEK;
// Common status
const DWORD CMciDevice::StatusReady = MCI_STATUS_READY;
const DWORD CMciDevice::StatusMediaPresent = MCI_STATUS_MEDIA_PRESENT;
const DWORD CMciDevice::StatusMode = MCI_STATUS_MODE;
const DWORD CMciDevice::StatusNumberOfTracks = MCI_STATUS_NUMBER_OF_TRACKS;
// Common capabilites
const DWORD CMciDevice::GetdevcapsCanEject = MCI_GETDEVCAPS_CAN_EJECT;
const DWORD CMciDevice::GetdevcapsCanPlay = MCI_GETDEVCAPS_CAN_PLAY;
const DWORD CMciDevice::GetdevcapsCanRecord = MCI_GETDEVCAPS_CAN_RECORD;
const DWORD CMciDevice::GetdevcapsCanSave = MCI_GETDEVCAPS_CAN_SAVE;
const DWORD CMciDevice::GetdevcapsCompound = MCI_GETDEVCAPS_COMPOUND_DEVICE;
const DWORD CMciDevice::GetdevcapsDeviceType = MCI_GETDEVCAPS_DEVICE_TYPE;
const DWORD CMciDevice::GetdevcapsHasAudio = MCI_GETDEVCAPS_HAS_AUDIO;
const DWORD CMciDevice::GetdevcapsHasVideo = MCI_GETDEVCAPS_HAS_VIDEO;
const DWORD CMciDevice::GetdevcapsUsesFiles = MCI_GETDEVCAPS_USES_FILES;

const DWORD CMciDevice::InfoProduct = MCI_INFO_PRODUCT;

const DWORD CMciDevice::DevtypeAnimation = MCI_DEVTYPE_ANIMATION;
const DWORD CMciDevice::DevtypeCdaudio = MCI_DEVTYPE_CD_AUDIO;
const DWORD CMciDevice::DevtypeDat = MCI_DEVTYPE_DAT;
const DWORD CMciDevice::DevtypeDigitalvideo = MCI_DEVTYPE_DIGITAL_VIDEO;
const DWORD CMciDevice::DevtypeOther = MCI_DEVTYPE_OTHER;
const DWORD CMciDevice::DevtypeOverlay = MCI_DEVTYPE_OVERLAY;
const DWORD CMciDevice::DevtypeScanner = MCI_DEVTYPE_SCANNER;
const DWORD CMciDevice::DevtypeSequencer = MCI_DEVTYPE_SEQUENCER;
const DWORD CMciDevice::DevtypeVcr = MCI_DEVTYPE_VCR;
const DWORD CMciDevice::DevtypeVideodisc = MCI_DEVTYPE_VIDEODISC;
const DWORD CMciDevice::DevtypeWaveaudio = MCI_DEVTYPE_WAVEFORM_AUDIO;

CMciDevice::CMciDevice() {
m_wDeviceID = NULL;
m_hMainWnd = NULL;
m_bReportErrors = FALSE;
}

CMciDevice::~CMciDevice() {
}

// Open by device name (obtained by the registry or system.ini)
DWORD CMciDevice::Open(LPCSTR lpstrName, BOOL bShareable /*=FALSE*/)
{
ASSERT(lpstrName != NULL);

DWORD dwReturn;
MCI_OPEN_PARMS mciOpenParms;

// Open a device by specifying the device name.
mciOpenParms.lpstrDeviceType = lpstrName;

DWORD dwFlags = MCI_OPEN_TYPE|MCI_WAIT;
if (bShareable) dwFlags |= MCI_OPEN_SHAREABLE;

dwReturn = SendCommand(MCI_OPEN, dwFlags, (DWORD)(LPVOID) &mciOpenParms);

if (dwReturn == 0) {
// The device opened successfully; get the device ID.
m_wDeviceID = mciOpenParms.wDeviceID;
}

return dwReturn;
}

// Open by device type
DWORD CMciDevice::Open(DWORD dwDeviceType, BOOL bShareable /*=FALSE*/)
{
DWORD dwReturn;
MCI_OPEN_PARMS mciOpenParms;

// Opens a device by specifying a device-type constant.
mciOpenParms.lpstrDeviceType = (LPCSTR) dwDeviceType;

DWORD dwFlags = MCI_OPEN_TYPE|MCI_OPEN_TYPE_ID|MCI_WAIT;
if (bShareable) dwFlags |= MCI_OPEN_SHAREABLE;

dwReturn = SendCommand(MCI_OPEN, dwFlags,
(DWORD)(LPVOID) &mciOpenParms);

if (dwReturn == 0) {
// The device opened successfully; get the device ID.
m_wDeviceID = mciOpenParms.wDeviceID;
}

return dwReturn;
}

// Closes the device
DWORD CMciDevice::Close() {
MCI_GENERIC_PARMS mciGenericParms;
mciGenericParms.dwCallback = (DWORD) m_hMainWnd;
return SendCommand(MCI_CLOSE, 0, (DWORD) &mciGenericParms);
}

// Gets the current callback window
HWND CMciDevice::GetCallbackHwnd() const {
return m_hMainWnd;
}

// Set the current callback window
void CMciDevice::SetCallbackWnd(CWnd *pWnd) {
ASSERT(pWnd != NULL);
m_hMainWnd = pWnd->GetSafeHwnd();
}

// Set the current callback window
void CMciDevice::SetCallbackWnd(HWND hWnd) {
ASSERT(hWnd != NULL);
m_hMainWnd = hWnd;
}

// Attaches the MCI device to a device already opened
void CMciDevice::Attach(UINT wDeviceID) {
m_wDeviceID = wDeviceID;
}

// Gets the device ID
MCIDEVICEID CMciDevice::GetDeviceID() const {
return m_wDeviceID;
}

// mciSendCommand with error handling
DWORD CMciDevice::SendCommand(UINT uMsg, DWORD fdwCommand, DWORD dwParam) {
DWORD dwReturn;
if (dwReturn = mciSendCommand(m_wDeviceID, uMsg, fdwCommand, dwParam)) {
m_dwLastError = dwReturn;
if (m_bReportErrors)
ShowError(dwReturn);
}
return dwReturn;
}

MCIERROR CMciDevice::GetLastError() const {
return m_dwLastError;
}

// Generic MCI_GETDEVCAPS_ITEM command: good for all devices
DWORD CMciDevice::GetDevCaps(DWORD dwDevcaps, BOOL bItem /*=FALSE*/) {
MCI_GETDEVCAPS_PARMS mciCapsParms;

mciCapsParms.dwCallback = (DWORD) m_hMainWnd;
mciCapsParms.dwReturn = 0;

if (bItem) {
mciCapsParms.dwItem = dwDevcaps;
dwDevcaps |= MCI_GETDEVCAPS_ITEM;
}

SendCommand(MCI_GETDEVCAPS, dwDevcaps, (DWORD) &mciCapsParms);

return mciCapsParms.dwReturn;
}

// Generic MCI_INFO command
DWORD CMciDevice::GetInfo(DWORD dwInfo, LPSTR lpstrReturn, DWORD dwRetSize) {
MCI_INFO_PARMS mciInfoParms;

mciInfoParms.dwCallback = (DWORD) m_hMainWnd;
mciInfoParms.lpstrReturn = lpstrReturn;
mciInfoParms.dwRetSize = dwRetSize;

return SendCommand(MCI_INFO, dwInfo, (DWORD) &mciInfoParms);
}

// Set error report on/off
void CMciDevice::ReportErrors(BOOL bReport /*=TRUE*/) {
m_bReportErrors = bReport;
}

// Uses mciGetErrorString to get a textual description of an MCI error.
// Displays the error description using MessageBox.
void CMciDevice::ShowError(DWORD dwError)
{
char szErrorBuf[MAXERRORLENGTH];
MessageBeep(MB_ICONEXCLAMATION);

CWnd* pMainWnd = AfxGetApp()->m_pMainWnd;
ASSERT(pMainWnd != NULL);
HWND hMainWnd = pMainWnd->GetSafeHwnd();

if(mciGetErrorString(dwError, (LPSTR) szErrorBuf, MAXERRORLENGTH)) {
MessageBox(hMainWnd, szErrorBuf, _T("MCI Error"),
MB_ICONEXCLAMATION);
}
else
MessageBox(hMainWnd, _T("Unknown Error"), _T("MCI Error"),
MB_ICONEXCLAMATION);
}

// Closes all MCI devices opened by the application.
// Waits until devices are closed before returning.
DWORD CMciDevice::CloseAll()
{
DWORD dwReturn;

if (dwReturn = mciSendCommand(MCI_ALL_DEVICE_ID, MCI_CLOSE, MCI_WAIT, NULL))
ShowError(dwReturn);
return dwReturn;
}

DWORD CMciDevice::GetMode() {
return GetStatus(StatusMode);
}

// Generic MCI_STATUS command
DWORD CMciDevice::GetStatus(DWORD dwItem) {
MCI_STATUS_PARMS mciStatusParms;
mciStatusParms.dwCallback = (DWORD) m_hMainWnd;
mciStatusParms.dwItem = dwItem;
mciStatusParms.dwReturn = 0;

SendCommand(MCI_STATUS, MCI_STATUS_ITEM, (DWORD) &mciStatusParms);

return mciStatusParms.dwReturn;
}

Joaquín M López Muñoz15-Feb-02 9:25

Re: problem with mmsystem.h

15-Feb-02 9:25

It's all very weird. Your code seems fine at first glance. Try the following:

Switch off the precompiled headers option for the project and do a "Rebuild all".
If this fails, please post your stdafx.h (if we go on like this, I'll be able to steal your project ).

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

starn15-Feb-02 9:45

15-Feb-02 9:45

Sorry but I found these codes in a tutorial at
http://codeguru.earthweb.com/multimedia/cd_audio.shtml

I don't have a lot of experience with C++
I only know some bases
In fact, I have to make a program that play a CD audio, transorm the datas in a specific norm and send them through Fast ethernet to an other computer...
And I m lost in all these functions and classes...
I m trying to find some codes to play a CD , control a buffer... I know it's going to be hard ...
Do you know any good books on these topics ?

and I don't know how to switch off the precompiler header ....

// stdafx.h : include file for standard system include files,
// or project specific include files that are used frequently, but
// are changed infrequently
//

//#define VC_EXTRALEAN // Exclude rarely-used stuff from Windows headers

#include <afxwin.h> // MFC core and standard components
#include <afxext.h> // MFC extensions
#ifndef _AFX_NO_AFXCMN_SUPPORT
#include <afxcmn.h> // MFC support for Windows 95 Common Controls
#endif // _AFX_NO_AFXCMN_SUPPORT

I found it!

Joaquín M López Muñoz15-Feb-02 10:11

15-Feb-02 10:11

Hey starn, this was tough Smile | :)

Apparently there's a problem with mmsystem.h in VC++ 6.0. Follow this article in Usenet explaining how to solve it.

The guy talks about "preprocesor settings". I guess you won't know where those are (because you didn't know how to switch precompiled headers off either). Select Project->Settings, there you'll find lots of stuff, including the preprocessor settings and the precompiled headers options. Give yourself sometime to get used to the IDE.

Good luck with your project.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

starn16-Feb-02 4:32

16-Feb-02 4:32

I just woke up, I m from Belgium and I couldn't wait for your answer last night because my friends came to pick me up to go out.I haven't tried your solution yet but I wanted to thank you a lot !!!
I'll tell you if it's working or not, thanks again Big Grin | :-D

Joaquín M López Muñoz16-Feb-02 5:05

16-Feb-02 5:05

I couldn't wait for your answer last night because my friends came to pick me up to go out.
Same here Smile | :)

I posted this answer just before going out for a couple of drinks --my friends were running out of patience.

I'll tell you if it's working or not, thanks again
Please do it. You are welcome.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

starn16-Feb-02 5:37

16-Feb-02 5:37

I m sorry to tell you that I still got the 2 same errors... And I think I did everything correctly... Cry | :((

You're from Spain, I love Spain soooo much! I went to Madrid a few month ago, crazy city!!and we went , me and my girlfriend, to Ibiza twice the past two years.
Anyway, thanks for trying to solve my problem.My ears are wide open if you have an other solution Smile | :)

At least, I know that I m not the only one that got this problem...

Joaquín M López Muñoz16-Feb-02 6:04

16-Feb-02 6:04

Oh, this is becoming personal Smile | :)

Usually this kind of errors don't last that long...

I'd try to load the offending project from the URL you provided some messages ago, but on weekends I've got no IDE handy.
Do a search on groups.google.com for "mmsystem.h C2146". Apparently a lot of people have run into the same problem in the past. Try to follow the advice given there. Sorry I couldn't be more helpful. Good luck!

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

starn16-Feb-02 6:14

16-Feb-02 6:14

thanks a lot, i'll try that, have a nice week-end...
Wink | ;)

reading files

RK_200015-Feb-02 6:42

RK_2000

15-Feb-02 6:42

I have done a fair chunk of reading and writing from/to files, but I was wondering if there is anyway of not specifying the input buffer's size when you are reading in. For instance, I would like to read in an entire line, but I don't want to read it into a TCHAR x[1000], I want to read it into something more flexible.

how would i do this?

Nish Nishant15-Feb-02 6:52

Nish Nishant

15-Feb-02 6:52

Read into a CString.

Nish

Nish was here, now Nish has gone;
He left his soul, to turn you on;
Those who knew Nish, knew him well;
Those who didn't, can go to hell.

I like to Jig | [Dance]

on the Code Project

Sonork ID 100.9786 voidmain
www.busterboy.org

alex.barylski15-Feb-02 6:52

alex.barylski

15-Feb-02 6:52

Holy christ nice timing Nish! Smile | :)

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Joaquín M López Muñoz15-Feb-02 6:54

15-Feb-02 6:54

This is unfair Smile | :)

my answer gets listed the last, yet its associated time is prior than the others' !!

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

alex.barylski15-Feb-02 7:09

alex.barylski

15-Feb-02 7:09

Joaquín M López Muñoz wrote:
This is unfair my answer gets listed the last, yet its associated time is prior than the others' !!

Poke tongue | ;-P

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Nish Nishant15-Feb-02 8:16

Nish Nishant

15-Feb-02 8:16

Joaquín M López Muñoz wrote:
my answer gets listed the last, yet its associated time is prior than the others' !!

Thats cause you used STL in your answer.
Chris M might not like that much.

Nish Big Grin | :-D

Nish was here, now Nish has gone;
He left his soul, to turn you on;
Those who knew Nish, knew him well;
Those who didn't, can go to hell.

I like to Jig | [Dance]

on the Code Project

Sonork ID 100.9786 voidmain
www.busterboy.org

Joaquín M López Muñoz15-Feb-02 9:20

15-Feb-02 9:20

LOL

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

alex.barylski15-Feb-02 6:52

alex.barylski

15-Feb-02 6:52

CFile myFile("theFile.dat", options);

int nSize = 663;

char* buff = new char[nSize];

myFile.Read(&buff, nSize);

delete [] buff;

I think this is what yer after...

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Joaquín M López Muñoz15-Feb-02 6:51

15-Feb-02 6:51

If you are into iostreams, this is the way:

std::istream in;
std::string str;
...
std::getline(in,str);

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Navier15-Feb-02 11:53

Navier

15-Feb-02 11:53

That's definitely the way I'd do it (you need an ifstream though not an istream) you get all the flexibility in the world and code re-use goes up 'cos you're not having to talk MFC. You can always use .c_str() on it if you need to get down and dirty. Why does anybody use anything else?

I hear The Prisoner and 7of9 aren't getting along too well these days.

Run to For's at once

Steven Richardson15-Feb-02 5:42

Steven Richardson

15-Feb-02 5:42

how do you run two for's at once?

Roger Allen15-Feb-02 5:53

Roger Allen

15-Feb-02 5:53

int i = 0 ;
int j = 0 ;

for ( ; i < 10 && j < 10 ; ++i, ++j)
{
}

Maybe that would do the job. I originally put i++, j++, but then I thought "Holy crap, I'll get blasted by all those c++ efficiency coders out there"

Roger Allen
Sonork 100.10016

If I'm not breathing, I'm either dead or holding my breath.
A fool jabbers, while a wise man listens. But is he so wise to listen to the fool?
Please step to the rear of the car and make room for more victims. - John Simmons the Outlaw programmer, 1st Feb 2002, in the lounge

Steven Richardson15-Feb-02 6:01

Steven Richardson

15-Feb-02 6:01

thanks worked great

Nish Nishant15-Feb-02 6:08

Nish Nishant

15-Feb-02 6:08

Ooops!
I misunderstood your question.
Please ignore my reply Smile | :)

Nish

Nish was here, now Nish has gone;
He left his soul, to turn you on;
Those who knew Nish, knew him well;
Those who didn't, can go to hell.

I like to Jig | [Dance]

on the Code Project

Sonork ID 100.9786 voidmain
www.busterboy.org