C / C++ / MFC

10-Jul-04 20:58

Hi!

I am newbie to programming in VC and really need some urgent help with executing command lines using VC.

i have a commandline encoder called encoder.exe . From MS-DOS prompt, I can execute the encoder by the following command line:

encoder hello.wav

where hello.wav is an input file to the encoder.exe and is found in the same directory as encoder. 2 files, hello.ogg and hello.phn will be generated by the encoder.

my problem is now how to execute the command line in VC? real sorry for this seemingly simply qn. i m a poor web searcher and after surfing the net for 1 whole day, i can hardly understand how i can even get started.

palbano10-Jul-04 21:36

10-Jul-04 21:36

I am not sure this is what you are asking but if it is... go into the Project/Settings and set the Debug/Program Arguments to:

hello.wav

Then start the debugger.

"No matter where you go, there your are." - Buckaroo Banzai

-pete

wb11-Jul-04 0:19

11-Jul-04 0:19

i guess it will work like this..

system("encoder hello.wav");

pork chop11-Jul-04 3:35

11-Jul-04 3:35

Hi!

Thanks to all for the prompt replies! Smile | :)

system("encoder hello.wav");

the above line works and it's great! thks!

I've also tried the following and it works too

SHELLEXECUTEINFO ShExecInfo = {0};<br />
ShExecInfo.cbSize = sizeof(SHELLEXECUTEINFO);<br />
ShExecInfo.fMask = SEE_MASK_NOCLOSEPROCESS;<br />
ShExecInfo.hwnd = NULL;<br />
ShExecInfo.lpVerb = NULL;<br />
ShExecInfo.lpFile = "oggenc.exe";<br />
ShExecInfo.lpParameters = "test.wav";<br />
ShExecInfo.lpDirectory = NULL;<br />
ShExecInfo.nShow = SW_HIDE;<br />
ShExecInfo.hInstApp = NULL;<br />
ShellExecuteEx(&ShExecInfo);

this might useful as the command prompt does not flash across the screen when executed Big Grin | :-D

thanks again!

wb11-Jul-04 3:57

11-Jul-04 3:57

yea! but its much longer Smile | :)

and dont forget to close the handle..

if(ShellExecuteEx(&inf)) {
  WaitForSingleObject(inf.hProcess,-1); //block until other process has finished
  CloseHandle(inf.hProcess);
}

pork chop12-Jul-04 3:41

12-Jul-04 3:41

hey thanks so much!

i'm still pretty new to VC executing commandline and will be most thankful if anyone has any useful website or articles to share Wink | ;)

pork chop14-Jul-04 18:45

problem reading id3v2 tags

14-Jul-04 18:45

hi!

i wonder if anyones knows how to execute commandline using javascript? I'm doing a website that needs to using a commandline encoder....

CPropertySheet question

hongheo7610-Jul-04 19:12

hongheo76

10-Jul-04 19:12

I am creating a tab dialog with several tabs.

After inserting the property sheet with 2 tabs, I tried to add some controls to Property Page 1.

If I double click on a control (say, a button) on Property Page 1, VC complains: Cannot add new member.

I thought it was because I hadn't created a class for it, so, I used Class Wizard create a CPage1::public CPropertyPage. Nothing changed !

Again, I opened Class wizard and double clicked on IDC_BUTTON1, then let VC create the new function OnButton1(). In the body of this function, I just MessageBox("Button")

However, when I ran the program, the Property Page1 showed up with the button, but when I clicked on it, nothing happened. And still, when I clicked on other controls, I received the same complains by VC: Can not add new member

Could any one tell me what's wrong with my program & give me step-by-step instructions on how to create a tab dialog ? For some reason, Googling CPropertySheet Tutorial didn't produce any good results.

Thanks so much for any help.

user31610-Jul-04 16:39

user316

10-Jul-04 16:39

Hello everyone.
I'm trying to properly read an id3v2 tag.
I've been trying for days now to figure it out but I cant seem to get it right.

here is what i have so far:

<br />
#include <iostream><br />
#include <string><br />
#include <fstream><br />
<br />
int main(int argc, char * argv[])<br />
{<br />
  if (argc != 2) {<br />
    cout<<"usage: id3v2 filename.mp3\n";<br />
    exit(0);<br />
  }<br />
<br />
  ifstream in;<br />
  in.open(argv[1]);<br />
<br />
  //read in the header.<br />
  char header[10];<br />
  in.read(header,10);<br />
  header[10] = '\0';<br />
<br />
  //make sure the tag exists.<br />
  if(header[0] == 'I' && header[1] == 'D' && header[2] == '3'){<br />
      //get header size.<br />
      int hSize = ((header[3] & 127) << 21) |<br />
                   ((header[4] & 127) << 14) |<br />
                   ((header[5] & 127) <<  7) |<br />
                   (header[6] & 127);<br />
<br />
      //get the version of the tag.<br />
      int versionMajor, versionMinor;<br />
      versionMajor = header[3];<br />
      versionMinor = header[4];<br />
<br />
      //get the flags.<br />
      bool unsynchronisation,compression,experimental,extended,footer;<br />
      unsynchronisation = false;<br />
      compression       = false;<br />
      experimental      = false;<br />
      extended          = false;<br />
      footer            = false;<br />
<br />
      //not sure if this is correct.<br />
      //Dont really completely understand the 0x80,0x40,etc..<br />
      switch(versionMajor){<br />
          case 2:<br />
               // %ab000000 in v2.2<br />
               unsynchronisation = (bool)(header[5] & 0x80);  // a - Unsynchronisation<br />
               compression       = (bool)(header[5] & 0x40);  // b - Compression<br />
               break;<br />
<br />
          case 3:<br />
               //%abc00000 in v2.3<br />
               unsynchronisation = (bool)(header[5] & 0x80); // a - Unsynchronisation<br />
               extended          = (bool)(header[5] & 0x40); // b - Extended header<br />
               experimental      = (bool)(header[5] & 0x20); // c - Experimental indicator<br />
               break;<br />
<br />
          case 4:<br />
               // %abcd0000 in v2.4<br />
               unsynchronisation = (bool)(header[5] & 0x80); // a - Unsynchronisation<br />
               extended          = (bool)(header[5] & 0x40); // b - Extended header<br />
               experimental      = (bool)(header[5] & 0x20); // c - Experimental indicator<br />
               footer            = (bool)(header[5] & 0x10); // d - Footer present<br />
               break;<br />
      }<br />
<br />
      //size of all of the frames.<br />
      int sizeOfFrames;<br />
      sizeOfFrames = hSize - 10; //- 10 to disclude the actual header.<br />
      /*  not sure if this should apply.<br />
      if(extended){<br />
           cout<<"extended\n";<br />
           char extHeader[4];<br />
           in.read(extHeader, 4);<br />
           int extSize;<br />
           extSize =  ((header[0] & 127) << 21) |<br />
                   ((header[1] & 127) << 14) |<br />
                   ((header[2] & 127) <<  7) |<br />
                   (header[3] & 127);<br />
          in.seekg(extSize);<br />
          sizeOfFrames -= extSize;<br />
      }<br />
      if(footer)<br />
          sizeOfFrames -= 10; //disclude the footer.<br />
      */<br />
<br />
      cout<<"sizeOfFrames="<<sizeOfFrames<<endl;<br />
      cout<<"\n\n";<br />
<br />
          while(sizeOfFrames > 0){<br />
              char frameId[4];<br />
              char frameData[6];<br />
              int frameSize;<br />
<br />
              in.read(frameId,4); //read the frame id 'TIT2',etc..<br />
              in.read(frameData,6); //read the rest of the frame header.<br />
<br />
              frameId[4]   = '\0'; //add null terminator to end of string.<br />
              frameData[6] = '\0'; //add null terminator to end of string.<br />
<br />
              //get the size of the frame.<br />
              frameSize =  ((frameData[0] & 127) << 21) |<br />
                        ((frameData[1] & 127) << 14) |<br />
                        ((frameData[2] & 127) <<  7) |<br />
                        (frameData[3] & 127);<br />
<br />
              if((frameSize > 0) && (frameSize < sizeOfFrames)){<br />
<br />
                    char tagInfo[frameSize];<br />
                    in.read(tagInfo,frameSize);<br />
                    tagInfo[frameSize] = '\0'; //add null terminator to end of string.<br />
<br />
                    cout<<"frameId="<<frameId<<"\n";<br />
                    cout<<"frameSize="<<frameSize<<"\n";<br />
                    cout<<"tagInfo=";<br />
                    for(int x=0;x<sizeof(tagInfo);x++)<br />
                            cout<<tagInfo[x]; //for some reason i cant just cout<<tagInfo<<"\n\n";<br />
                    cout<<"\n\n";<br />
<br />
              }<br />
              sizeOfFrames -= frameSize;<br />
          }<br />
          if(versionMajor == 2){<br />
                  ; //to do?<br />
          }<br />
      }<br />
  system("pause");<br />
  return 0;<br />
}<br />

Sometimes it will read a bunch of garbage in from the file and print out
unexpected results, and other times it reads the id3 tag just fine.
for example: i used winamp to modify the id3v2 tag of one of my mp3 files adding the year. Then i ran this code again and it produced the unexpected results. A different mp3 file already had the year in its id3v2 tag, and when i ran this code, the program read the id3 tag just fine.

I'm almost sure that the frames have to be read differently depending on which version the tag is. I'm not sure if thats the problem or how to go about doing that.

I found someone else's code from another website that i have been trying to go off of to figure this out.

you can find it here:
http://tebl.homelinux.com/projects.php
just scroll down and click on "ID3V2"
and then click on "id3v2.c"
(sorry i cant give a direct link)

I compiled and ran the code from this website, and it reads the id3 tags for mp3 files just fine!!
So this just adds to my frustration.. I have someone else's code in front of me that works, and i still cant figure this out writing it on my own.

one thing though, i want to use fstream to do this because im most comfortable with it, and i dont want to use any structures or classes.
Just trying to write it flat and easy until i can understand everything.

Could anyone help me with the problems in my code?
I cant seem to figure out what im doing wrong.
Thanks for your time.

Re: problem reading id3v2 tags

palbano10-Jul-04 17:09

Re: problem reading id3v2 tags

10-Jul-04 17:09

ifstream in;
in.open(argv[1], ios::in | ios::binary);

That's the first thing is saw.

"No matter where you go, there your are." - Buckaroo Banzai

-pete

user31611-Jul-04 18:34

user316

11-Jul-04 18:34

thanks, i forgot that flag. That helped a little bit. The problem is when i get the frame size sometimes it is incorrect. Or my loop is setup wrong?
This is how im determining the size of each frame of the id3 tag.

int frameSize = ((frameData[0] & 127) << 21) |
((frameData[1] & 127) << 14) |
((frameData[2] & 127) << 7) |
(frameData[3] & 127);

I got this code from another program and dont really understand it very much.
like ((frameData[0] & 127) why 127? and then followed by << 21 why 21?
how were these numbers were pulled out of the hat?

is this correct in determining the frame size?

OpenGL & GDI+

mostafa_pasha10-Jul-04 10:50

mostafa_pasha

10-Jul-04 10:50

Hi Dears,
I read application that use two view , first with GDI+ and Second with OpenGL.
Is there any conflict between these ?
and Can i do that ?

Best Regards,

OpenGL & GDI+

mostafa_pasha10-Jul-04 10:48

mostafa_pasha

10-Jul-04 10:48

Hi Dears,

Serial & Parrallel Communication!

mostafa_pasha10-Jul-04 10:38

mostafa_pasha

10-Jul-04 10:38

Hi Dears,
I wanna know , how i can access serial and parallel? and if i start to do that
with subject i should learn.

Best Regards,

Re: Serial & Parrallel Communication!

palbano10-Jul-04 17:00

10-Jul-04 17:00

mostafa_pasha wrote:
how i can access serial and parallel?

CreateFile()

mostafa_pasha wrote:
with subject i should learn.

I don't understand the question. Developing applications that use communication mechanisms generally requires a broad range of topics.

"No matter where you go, there your are." - Buckaroo Banzai

-pete

Debug Vs. Release

Neelesh K J Jain10-Jul-04 10:30

Neelesh K J Jain

10-Jul-04 10:30

Hello Friends,
This time I got another question for you.

In the Settings, we have got two options either we can go for Debug mode or Release Mode.
What are the main differences between the Debug Mode and the Release Mode? Which mode we have to choose?

Thank you
Bye friends.

Re: Debug Vs. Release

palbano10-Jul-04 10:34