Using AZID.DLL with Delphi - who can help?

LigH · 20th December 2001, 20:21

Dear friends,

I'm trying hard to use the AZID.DLL in an own Delphi program. But I get very strange problems, so I hope someone has much experience in both C and Delphi and can give me good hints how to solve them.

As far as I found out, "cdecl" calling mode is required, and the "int" fields in the ac3opts record really are longint wide. Now my problem is the callback function in ac3_readframe: The buffer address is not the same as the address of the allocated buffer, instead it jumps around like crazy but each time seems to request 1 byte. On request I could give you more details - but please announce private help first, I don't want to discuss every detail here.

DSPguru · 24th December 2001, 10:46

hi LigH !
azid will read 1 byte after 1 byte until he finds the syncinfo, then it will read 4 bytes (in order to find the frame size), and then it will read the whold frame (hundreds of bytes).

LigH · 26th December 2001, 10:03

It read 1 byte at least a hundred times (before I got tired to run my program step by step and let it run from there) - after minutes it was still reading, and all I could do was kill the process. And each time it reads one byte, it reads it to a different address, and this address is not the location of the allocated buffer - that's what I call strange. I guess I forgot one pointer dereferencing; I'll try again and tell you more soon (currently I'm not at home).

DSPguru · 27th December 2001, 18:29

it will keep on reading byte after byte unless it finds syncword. (2 bytes total), than it will read the rest of syncinfo (4 more bytes), and then it will read the whole frame into the buffer you supplied.

LigH · 28th December 2001, 16:53

He, DSPguru, I'm not stupid - I already got your first message

And I also was true - I just forgot to dereference a pointer (therefore I read from the file not into the buffer, but over the buffer address). Problem found and solved... on to the next one

DSPguru · 28th December 2001, 17:24

good luck !

20th December 2001, 20:21	#1 \| Link
LigH German doom9/Gleitz SuMo Join Date: Oct 2001 Location: Germany, Gardelegen Posts: 1,464	Using AZID.DLL with Delphi - who can help? Dear friends, I'm trying hard to use the AZID.DLL in an own Delphi program. But I get very strange problems, so I hope someone has much experience in both C and Delphi and can give me good hints how to solve them. As far as I found out, "cdecl" calling mode is required, and the "int" fields in the ac3opts record really are longint wide. Now my problem is the callback function in ac3_readframe: The buffer address is not the same as the address of the allocated buffer, instead it jumps around like crazy but each time seems to request 1 byte. On request I could give you more details - but please announce private help first, I don't want to discuss every detail here.

24th December 2001, 10:46	#2 \| Link
DSPguru BeSweet Author Join Date: Oct 2001 Location: On top of a supercompact cardinal Posts: 3,506	hi LigH ! azid will read 1 byte after 1 byte until he finds the syncinfo, then it will read 4 bytes (in order to find the frame size), and then it will read the whold frame (hundreds of bytes). __________________ FAQs : BeSweet, Audio :readfaq: Homepage : DSPguru's Webpage http://dspguru.notrace.dk/cs.gif Guides : Multilingual Guides of my tools http://dspguru.notrace.dk/1zhelp.gif

27th December 2001, 18:29	#4 \| Link
DSPguru BeSweet Author Join Date: Oct 2001 Location: On top of a supercompact cardinal Posts: 3,506	it will keep on reading byte after byte unless it finds syncword. (2 bytes total), than it will read the rest of syncinfo (4 more bytes), and then it will read the whole frame into the buffer you supplied. __________________ FAQs : BeSweet, Audio :readfaq: Homepage : DSPguru's Webpage http://dspguru.notrace.dk/cs.gif Guides : Multilingual Guides of my tools http://dspguru.notrace.dk/1zhelp.gif Last edited by DSPguru; 27th December 2001 at 18:32.

28th December 2001, 17:24	#6 \| Link
DSPguru BeSweet Author Join Date: Oct 2001 Location: On top of a supercompact cardinal Posts: 3,506	good luck ! __________________ FAQs : BeSweet, Audio :readfaq: Homepage : DSPguru's Webpage http://dspguru.notrace.dk/cs.gif Guides : Multilingual Guides of my tools http://dspguru.notrace.dk/1zhelp.gif

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26th December 2001, 10:03	#3 \| Link
LigH German doom9/Gleitz SuMo Join Date: Oct 2001 Location: Germany, Gardelegen Posts: 1,464	It read 1 byte at least a hundred times (before I got tired to run my program step by step and let it run from there) - after minutes it was still reading, and all I could do was kill the process. And each time it reads one byte, it reads it to a different address, and this address is not the location of the allocated buffer - that's what I call strange. I guess I forgot one pointer dereferencing; I'll try again and tell you more soon (currently I'm not at home).

28th December 2001, 16:53	#5 \| Link
LigH German doom9/Gleitz SuMo Join Date: Oct 2001 Location: Germany, Gardelegen Posts: 1,464	He, DSPguru, I'm not stupid - I already got your first message And I also was true - I just forgot to dereference a pointer (therefore I read from the file not into the buffer, but over the buffer address). Problem found and solved... on to the next one