When I use lzma920/C/Util/7z/7zmain test in ipad1 to decompression a bit large bigger 7z file , I found equipment memory burstmemory What method can be solved？
Program collapse place in this FOR cycle inside
static SRes SzDecodeLzma(CSzCoderInfo *coder, UInt64 inSize, ILookInStream *inStream,
Byte *outBuffer, SizeT outSize, ISzAlloc *allocMain)
I'm sorry my English is very poor
Please write more details.
What archive do you decompress (size, number of files, amd so on).
Did you make any changes in source code?
It is a file of 200M basic inside is JPG and BMP files, compressed into 7z format is 4.4 M. Then I use 7zmian to decompression this 4.4M file 。In the emulator ， ipad2, ipad3 can decompressed 。Only in ipad1 cannot decompression。
I don't have altered code ！
I can be sure that is ipad1 memory on the burst ！ What should I change ANSI - C LZMA let big 7z files can be in ipad1 on decompression ？ thank you！
ANSI-C LZMA Decoder allocates whole solid block in RAM for decompression.
If you compress files for these 7z files, don't use solid copmression or use small solid block size.
don't use solid copmression or use small solid block size ？ What should I do and how to modify the ANSI-C LZMA code？ thank you！
You can't change ANSI-C LZMA decoder code.
But if you compress these 7z files, you can change compression settings, so ANSI-C LZMA decoder code will work.
If you don't control archive creating, you can't change anything. In that case you must use C++ code from p7zip instead.
change compression settings ？Where is it set up？ Can you tell me the location of the specific Settings In the code ？
You can change compression settings from command line:
1) default settings:
7z a archive1.7z *.JPG *.BMP
you need BIG ram amount to decompress archive1.7z with ANSI-C LZMA Decoder
2) changed settings (with solid mode off)
7z a archive2.7z *.JPG *.BMP -ms-
So probably you will be able to decompress archive2.7z in iPad1 with small RAM size.
7z decompression of the command line help in ANSI-C LZMA is this :
"Usage: 7zDec <command> <archive_name>\n\n"
" e: Extract files from archive (without using directory names)\n"
" l: List contents of archive\n"
" t: Test integrity of archive\n"
" x: eXtract files with full paths\n"
Didn't you say that the command line format ？ Thank you for your answer
I mean full 7z.exe from 7-Zip for Windows.
Oh 。。My goodness ！！！