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ffsds4

Crappy DoubleShock4 simulator.

plz let me on PSXHAX again.

Usage

Make sure the UDC driver module for your board and libcomposite module are loaded. If testing on PC, use dummy_hcd as the UDC driver. Also, make sure libaio is installed on both your target and development systems since python-functionfs requires it.

To start ffsds4 using pipenv, run:

pipenv install # after checkout
pipenv run start-with-sudo -k <path to a DS4Key> --username=$USER

To create an executable for easy transport and faster startup, use:

pipenv install --dev # after checkout

# Make a standalone package
pipenv run package

# Make a single file executable
pipenv run package-onefile

Note that targeting Arm-based hardware requires the use of emulators and like (such as QEMU) or a real Arm-based hardware that runs a Linux distro similar enough to the target board (in terms of libc version).

If ffsds4 fails with -EBUSY, try unloading the kernel module g_ffs. If the module is built-in (e.g. on Manjaro ARM for Pinephone), blacklist gfs_init function by adding initcall_blacklist=gfs_init to the kernel cmdline and reboot the system.

Profiling

Run ffsds4 with parameter --profile path/to/result.profile to enable profiler.

Result is saved as standard Python profile/cProfile dump file. This file can be decoded using Python's profile or cProfile module.

To visualize the result using snakeviz, make sure you installed the development dependencies, then run

pipenv run snakeviz path/to/result.profile

Alternatively you could use tuna, which sometimes produces better graph than snakeviz but has less features:

pipenv run tuna path/to/result.profile