Audio Track - NSIS Forums

Napek
8th December 2001 10:58 UTC

Audio Track
Can I somehow check with my installer if audio track exist on cd?

F. Heidenreich
8th December 2001 11:09 UTC

Hi Napek,

if you know the full path to the audio track you could use the IfFileExists command, if you don't know the full path you probably could use the depth-first scan mentioned in this article.

~ Florian

Napek
8th December 2001 21:03 UTC

I got a cd with data and audio track and i want installer to check if data track exist if is this possible

petersa
11th December 2001 03:50 UTC

Hi Napek,

You should be able to check for your data track by checking if certain files exist on the CD.

If you are familiar with a programming language, you can use MCI to count the number of tracks on a CD. You would need to write a small app to do this though.

I reckon it would be real cool if someone wrote a small app that allows you to pass an MCI command as a parameter, and the output was written to a small file. Any takers? :D

Napek
11th December 2001 19:56 UTC

I don't want to check for data track w want to my instaler to check if exist audio track on cd with installer. I want it for some kind of primitive protection i want change TOC of cd that you can't copy audio track and if cou copy cd file by file it wont be work if audio track doesn't exist.

petersa
13th December 2001 10:32 UTC

Originally posted by Napek
i want installer to check if data track exist

Originally posted by Napek
I don't want to check for data track

Just use MCI to check how many tracks exist on the CD. If only one track exists on it then the CD has been improperly copied, because there are no audio tracks.

If you want even better protection, you can use MCI to measure the length of each and every (data and audio) track, and if one of them differs, you know the CD has been copied.

Which programming languages are you familiar with? Pretty much every language supports MCI.

Napek
13th December 2001 18:55 UTC

Amos on Amiga & scripts for Flash :) If yo can write for me that something you talking about and i can put it in NSIS script i'll be very happy :)

F. Heidenreich
13th December 2001 22:08 UTC

Napek, I quickhacked a NSIS extension DLL for you, which pushes the number of audio tracks of the CD in drive $0 on top of the stack - please note that it's a quick hack - source is included ;).

Use it, modify it and let me know if someone has any improvements or additions to it.

Regards,
~ Florian

F. Heidenreich
14th December 2001 13:01 UTC

At petersas suggestion I improved the nsisext_mci.dll a little bit to take any mci command string from stack and execute it. Sources and a small example is included. Error strings or result strings are copied to $0.

Have Fun :)
~ Florian

Napek
14th December 2001 20:58 UTC

Thanks :) I'll check what i can do with this and reply tommorow.

petersa
15th December 2001 10:05 UTC

Thanks to Florian's excellent work, people are now able to use video files (AVIs, MPEGs, ...) as splash screens!

If anyone's interested, let me know and I'll post the MCI code.

I reckon this deserves its own thread.

Napek
15th December 2001 20:14 UTC

Ok now i got number of audio tracks and its very good but you say that lenght of audio track can be checked too. Is it possible to add something like this to nsisext_mci?

F. Heidenreich
16th December 2001 12:28 UTC

It's already possible with nsisext_mci :) Try this:


Name "nsisext_mci"
OutFile "nsisext_mci.exe"
AutoCloseWindow true

Function .onInit
  SetOutPath $TEMP
  File nsisext_mci.dll
  CallInstDLL nsisext_mci.dll nsisGetFirstCDROMDrive
  StrCpy $2 "open $0 type cdaudio alias nsis wait"
  StrCpy $1 "status nsis number of tracks wait"
  StrCpy $0 "status nsis length track 1"
  Push $0
  Push $1
  Push $2
  CallInstDLL nsisext_mci.dll nsisMCISendString
  MessageBox MB_OK "Length of track 1: $0"
FunctionEnd

Section
  ; Rest of the setup...
SectionEnd

Function .onInstSuccess
  Delete nsisext_mci.dll
FunctionEnd

For more mci command see the mci reference at MSDN

~ Florian

Napek
18th December 2001 15:31 UTC

I try to use something like this:

StrCpy $6 x (or reading value from registry where x is number of tracks)
StrCmp $0 $6 OK BAD
OK:
MessageBox............
BAD:
MessageBox............

And it wont work why?

And how to compare lenght of track on cd with lenght of track that i give as a variable for example track on cd has 30 sec and on my install cd that skould be 28 sec and installer goto BAD: or OK:

F. Heidenreich
18th December 2001 21:15 UTC

It works ;)

Have a look at this small script and change the numbers I'm comparing to, to your specific requests:


Name "nsisext_mci"
OutFile "nsisext_mci.exe"
AutoCloseWindow true

Function .onInit
  SetOutPath $TEMP
  File nsisext_mci.dll

# getting information from nsisext_mci
# get the first CD-ROM  drive
  CallInstDLL nsisext_mci.dll nsisGetFirstCDROMDrive
# copy drive to $R0
  StrCpy $R0 $0
# do the track thing
  StrCpy $1 "open $R0 type cdaudio alias nsis wait"
  StrCpy $0 "status nsis number of tracks wait"
  Push $0
  Push $1
  CallInstDLL nsisext_mci.dll nsisMCISendString
  MessageBox MB_OK "Number of tracks: $0"
  StrCpy $R1 $0
# do the length thing in milliseconds
  StrCpy $1 "set nsis time format milliseconds wait"
  StrCpy $0 "status nsis length track 1 wait"
  Push $0
  Push $1
  CallInstDLL nsisext_mci.dll nsisMCISendString
  MessageBox MB_OK "Length of track 1: $0 ms"
  StrCpy $R2 $0
# close the device
  StrCpy $0 "close nsis"
  Push $0
  CallInstDLL nsisext_mci.dll nsisMCISendString

# proove number of tracks
# 18 or what ever your track count is
  IntCmp $R1 18 lblTrackOK lblTrackBAD
  lblTrackBAD:
    MessageBox MB_OK "BAD CD!"
    Abort
  lblTrackOK:
    MessageBox MB_OK "GOOD CD!"

# prove track length
# 321294 or what ever your length of track 1 is (in ms)
  IntCmp $R2 321294 lblLengthOK lblLengthBAD
  lblLengthBAD:
    MessageBox MB_OK "BAD length!"
    Abort
  lblLengthOK:
    MessageBox MB_OK "GOOD length!"
FunctionEnd

Section
  ; Rest of the setup...
SectionEnd

Function .onInstSuccess
  Delete "$TEMP\nsisext_mci.dll"
FunctionEnd

~ Florian

eccles
19th December 2001 00:10 UTC

btw, you can simplify some of that e.g. by changing

  StrCpy $1 "open $R0 type cdaudio alias nsis wait"
  StrCpy $0 "status nsis number of tracks wait"
  Push $0
  Push $1
  CallInstDLL nsisext_mci.dll nsisMCISendString

  Push "status nsis number of tracks wait"
  Push "open $R0 type cdaudio alias nsis wait"
  CallInstDLL nsisext_mci.dll nsisMCISendString

--
Dave.

F. Heidenreich
19th December 2001 09:06 UTC

Thanks Dave, - it was my first time on NSIS stack :)
~ Florian

Napek
19th December 2001 20:17 UTC

Everything working fine BUT if no cd in cd-rom there is an error message mybe you can do something with this and one more thing secconds will be better to check lenght of the track. I got hope that us work will be added to NSIS :). F. Heidenreich you great :)

F. Heidenreich
19th December 2001 20:32 UTC

You could comment out the MessageBox calls - no error messages will pop up.
And to compare to seconds simply divide the milliseconds by 1000 (IntOp $R2 $R2 / 1000 in the sample script).

~ Florian

[edit]And thanks for your praise :)[/edit]

Napek
20th December 2001 16:54 UTC

:) HOW? :)

F. Heidenreich
20th December 2001 17:08 UTC

Quote from documentation:

Lines beginning with ; or # are comments.

See http://www.firehose.net/free/nsis/makensis.htm#IntOp for IntOp documentation.

I've included my last sample script for this thread. And for the next time: please have a look in the NSIS documentation before you post a question. Thanks in advance.

~ Florian

Napek
23rd December 2001 21:15 UTC

Hmmm everything was ok but i've was got old version of NSIS and on NSIS v1.91 everything works fine :)

petersa
24th December 2001 11:09 UTC

Actually, you can even check if there's a CD in the drive using MCI. Not sure how, but it's possible! So you can even throw up a box like 'Please insert the CD.' or something.