chdkptp - alternative ptp client

reyalp

blackhole
The last few days I've been playing with Ubuntu 20.04 under VM and chdkptp works pretty well, both versions, CLI and GUI.
In the latest distribution libreadline.so.6 has been upgraded to libreadline.so.8, this solves the problem:
[code]cd / lib / x86_64-linux-gnu /
sudo ln -s libreadline.so.8.0 libreadline.so.6
sudo ln -s libhistory.so.8.0 libhistory.so.6[/code]
I have no clue about working on Linux, the last time I worked on a Unix / Linux system was in the early 90s, maybe there is a better solution but I only remembered this. 😁

Thanks for the report.

Which chdkptp build is this? The 921 snapshot is supposed have readline and the related libraries statically linked to avoid this.

Using symlinks like this isn't recommended since the ABIs are actually different, but I suspect it would work for chdkptp in this case.

The next step is compiling under Linux. 😛

It should be relatively easy these days
download and configure external libraries with
misc/setup-ext-libs.bash
then make to build. editing config.mk shouldn't be required any more (if you are building in an existing source tree, it would be good to remove any old config.mk and start fresh).

blackhole

reyalp
Which chdkptp build is this? The 921 snapshot is supposed have readline and the related libraries statically linked to avoid this.

Using symlinks like this isn't recommended since the ABIs are actually different, but I suspect it would work for chdkptp in this case.

Older r795,I didn't choose the latest one, I was just interested in whether it works under VM. This way I struggled a bit and learned something new.

It should be relatively easy these days
download and configure external libraries with
misc/setup-ext-libs.bash
then make to build. editing config.mk shouldn't be required any more (if you are building in an existing source tree, it would be good to remove any old config.mk and start fresh).

Thanks for the advice!

philmoz

For review - quick & dirty patch to make chdkptp work with Lua 5.3.

Changes:
- copy code for luaL_register and luaL_optint from Lua 5.2 to luautil.h & luautil.c
- add fixes for deprecated loadstring, unpack and table.maxn functions in main.lua
- change %d format strings to %.0f (Lua 5.3 won't convert float to int unless the float is an exact integer value)

All tests in 'test.lua' and 'camtests.lua' pass on MacOS Catalina and Debian (LMDE 2).
IUP/CD GUI appears to work correctly (Debian).

Notes:
- table.maxn patch uses #t for table length, not sure if this is ok as the two are not identical
- there may still be other '%d' format strings that need changing.

Phil.

chdkptp-lua53.patch

5.47KB

reyalp

philmoz
For review - quick & dirty patch to make chdkptp work with Lua 5.3.

Thanks, much appreciated.

Out of curiosity, did you run into something that requires to you use 5.3? The current recommended process using misc/setup-ext-libs.bash should be completely self contained without dependency on system installed Lua.

Supporting 5.3 and dropping 5.1 support have been on my TODO list forever, so it's not wasted effort in any case.

Caefix

😳 if (os.stat(LOG_NAME)) then
Lua 5.3.4 Copyright (C) 1994-2017 Lua.org, PUC-Rio
File:52: attempt to call a nil value (field 'stat')

reyalp

Caefix
😳 if (os.stat(LOG_NAME)) then
Lua 5.3.4 Copyright (C) 1994-2017 Lua.org, PUC-Rio
File:52: attempt to call a nil value (field 'stat')

os.stat is a CHDK addition to camera side Lua (which is still version 5.1). If you want equivalent operations in chdkptp PC side Lua, you would use lfs.attributes

Caefix

😀 Maybe You want to test Emulator with Keywords updated until set_clock here:

[upl-file uuid=56f40f9f-a5bf-4ab0-9f7d-80a8a88fc920 size=20.16KB url=https://chdk.setepontos.com/assets/files/2026-04-13/1776115820-165788-hostlua-5571.zip]hostlua#5571.zip[/upl-file]

reyalp

philmoz
Notes:
- table.maxn patch uses #t for table length, not sure if this is ok as the two are not identical

I had to jog my memory a bit for this one, but it's not. From the 5.1 manual (maxn was already deprecated in 5.2)

Returns the largest positive numerical index of the given table, or zero if the table has no positive numerical indices. (To do its job this function does a linear traversal of the whole table.)

This allows holes, which ends up being important for cases like camera side code doing

return 1, nil, 2

and the PC side code putting return values the values into an array (see con_methods:exec toward the end)

I should add something to camtests for this.

There are also some other cases that rely on this behavior.

Anyway, this can be fixed with a trivial, inefficient Lua implementation of maxn.

philmoz

reyalp

philmoz
Notes:
- table.maxn patch uses #t for table length, not sure if this is ok as the two are not identical

I had to jog my memory a bit for this one, but it's not. From the 5.1 manual (maxn was already deprecated in 5.2)
Anyway, this can be fixed with a trivial, inefficient Lua implementation of maxn.

Thanks for that. To avoid any conversion issue I copied the C code for maxn from 5.2 and added it to the 'sys' table on startup.

Updated patch also fixes lsignal.c (luaL_register), %d format strings in gui_live_stats.lua and a copy/paste typo in gui_user.lua.

Phil.

chdkptp-lua53-v2.patch

7.79KB

reyalp

Wow, nice work. I'll have to think about what the way forward is, it would be nice not to maintain two parallel versions of the GUI.

I just checked in the 5.3 support stuff, along with support in makefile and setup scripts, in r948

Everything defaults to Lua 5.2. To use Lua 5.3
misc/setup-ext-libs.bash -lua-ver=53
add USE_LUA_VER=53 to config.mk
misc/bin-snapshot.bash -libs=linux-lua53
(Windows doesn't require -libs since it's all static)

I think there are still some corner cases involving integer format strings, but I don't expect the changes to cause any problems in 5.2.

reyalp

Split the lgi / new gui discussion to https://chdk.setepontos.com/d/14117

It's a little disjointed with the Lua 5.3 stuff (which I mostly left here), but I think it makes sense to have it's own thread, and this one is already quite long 😉

c_joerg

Since my Windows Update from 7 to 10, my CHDKPTP no longer works.
The libusb0.dll cannot be found.
I've already tried to reinstall the driver with zadig-2.5.exe, but it didn't work.
What else can i do?

Caefix

😳 Use Zadig again, itÂ´s easy to miss a mouseclick.

c_joerg

It works again now. I can't say what exactly it was. I just used a different USB port.

reyalp

Build 964 is posted on the files pages: https://app.assembla.com/spaces/chdkptp/documents

Main purpose is to provide a build that supports CHDK 1.5 Canon raw remote shoot. I also added a CLI command 'clock' which allows setting the camera clock or synchronizing it to the host. Other tweaks and fixes are listed in the changelog https://app.assembla.com/spaces/chdkptp/wiki/Changelog

Linux builds tested on Raspberry Pi OS (formerly raspbian) 10, Debian 10, Ubuntu 20.04 and 20.10, Fedora 31 and 33.

These builds are still use Lua 5.2, and do not include philmoz alternate GUI.

reyalp

The chdkptp trunk now supports philmoz lgi gui. Details: https://chdk.setepontos.com/d/14117

openuas

reyalp
The chdkptp trunk now supports philmoz lgi gui. Details: https://chdk.setepontos.com/d/14117

Awesome!

Caefix

reyalp
os.stat is a CHDK addition to camera side Lua (which is still version 5.1). If you want equivalent operations in chdkptp PC side Lua, you would use lfs.attributes

http://keplerproject.github.io/luafilesystem/manual.html 😀

ToyJammer

Hi all! Thanks for making this great program!!

I'm using a s95 and my live viewport shows only the top half? What am I doing wrong? Photos turn out fine - I just can't see half of what I'm shooting!!

Thanks for any advice / guidance 😀

reyalp

ToyJammer
Hi all! Thanks for making this great program!!

I'm using a s95 and my live viewport shows only the top half? What am I doing wrong? Photos turn out fine - I just can't see half of what I'm shooting!!

It looks like the viewport functions in the s95 port are probably incomplete, which firmware do you have?

Also, can you check the zebra function like described here https://chdk.fandom.com/wiki/Testing#Zebra_test (using the camera LCD, not chdkptp)

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