Can I compile in VC2008 with a makefile?

[Anna Smidt]

After having programmed since 8 years only VB6 I want to learn C++.NET now.
It's amazing that everything has to be prepared first. For example I
want to build the DirectShow baseclass, but the only files I found in
the PSDK\Samples\Mu ltimedia\Direct Show\BaseClasse s are

..cpp
..h
makefile

I would like to ask how I should compile them because I was thinking
that I would have a .sln file. Or can I use the makefile somehow in
VC++2008.NET. Btw, when talking about VC++2008, should I say VC9?

[SvenC]

Hi Anna,

thanks, you're really nice. I know this link.
I don't have any problems running an OpenCV application, but there is
a bug in the OpenCV libraries themselves. I want to fix it and then
rebuild it. Maybe it's easy, but at 4 in the morning I gave up :-)
I will try it again now.

Sometimes a break is quite helpful ;-)

Just come back with source and compiler errors if you can't find out
yourself what's wrong. There are quite some helpful eyes around here.

--
SvenC

[Granville Barnett]

"SvenC" <Sv***@nospam.n ospamwrote in message
news:uX******** ******@TK2MSFTN GP03.phx.gbl...

Hi Anna,

>thanks, you're really nice. I know this link.
I don't have any problems running an OpenCV application, but there is
a bug in the OpenCV libraries themselves. I want to fix it and then
rebuild it. Maybe it's easy, but at 4 in the morning I gave up :-)
I will try it again now.

Sometimes a break is quite helpful ;-)

Just come back with source and compiler errors if you can't find out
yourself what's wrong. There are quite some helpful eyes around here.

--
SvenC

I would definatley give their build instructions a close read, sometimes you
may have to set some env variables manually as well (I know...).

Let us know how you get on.

Granville

[Anna Smidt]

Hi Sven,

it's all going well :-) I'm really happy! At least there is nothing that
really blocks me from going on.

I have a question:

I have this class:

class asmmovieavi
{
public:
asmmovieavi(): capimg(0), capture(0), image(0){ }
~asmmovieavi(){ Close();}

// Open a AVI file
void Open(const char* videofile);

//capture from live camera
void CaptureCamera() ;

// Close it
void Close();

// Get concrete frame of the video
// Notice: for speed up you have no need to release the returned image
IplImage* ReadFrame(int frame_no = -2);

// frame count of this video
const int FrameCount()con st
{return (int)cvGetCaptu reProperty(capt ure, CV_CAP_PROP_FRA ME_COUNT);}

const int Type()const{ return avi_or_cam; }

private:
IplImage* capimg;//captured from video
IplImage *image;
CvCapture* capture;
int avi_or_cam; //0:avi, 1:cam

};

I think it's a beginner's misunderstandin g, but I don't see where const
char* videofile goes. I mean to me it looks as if the class doesn't
really do anything with "videofile" . I thought that void Open was a
public void that I one can call when he has a handle to the class. At
least I am calling this void in another part of my code, so I'm
wondering what it does.
Even more strange to me is "void Close()". It seems to be hanging around
in there doing nothing.

Thanks again a lot.
Anna

[Ben Voigt [C++ MVP]]

Anna Smidt wrote:

Hi Sven,

it's all going well :-) I'm really happy! At least there is nothing
that really blocks me from going on.

I have a question:

I have this class:

class asmmovieavi
{
public:
asmmovieavi(): capimg(0), capture(0), image(0){ }
~asmmovieavi(){ Close();}

// Open a AVI file
void Open(const char* videofile);

//capture from live camera
void CaptureCamera() ;

// Close it
void Close();

// Get concrete frame of the video
// Notice: for speed up you have no need to release the returned image
IplImage* ReadFrame(int frame_no = -2);

// frame count of this video
const int FrameCount()con st
{return (int)cvGetCaptu reProperty(capt ure, CV_CAP_PROP_FRA ME_COUNT);}

const int Type()const{ return avi_or_cam; }

private:
IplImage* capimg;//captured from video
IplImage *image;
CvCapture* capture;
int avi_or_cam; //0:avi, 1:cam

};

I think it's a beginner's misunderstandin g, but I don't see where
const char* videofile goes. I mean to me it looks as if the class
doesn't really do anything with "videofile" . I thought that void Open
was a public void that I one can call when he has a handle to the
class. At least I am calling this void in another part of my code, so
I'm wondering what it does.
Even more strange to me is "void Close()". It seems to be hanging
around in there doing nothing.

This is a totally new question, you should have started a new thread with an
appropriate subject line.

To answer your question, the lines you show are prototypes aka forward
declarations. The actual code implementing these functions is elsewhere.
This separation of interface and implementation is something that many other
C-syntax languages (Java, C#, etc) do not allow.

>
Thanks again a lot.
Anna

[Anna Smidt]

Thank you!
Anna