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The Linux kernel configuration item CONFIG_SND_PCMTEST
:
CONFIG_DEBUG_FS
snd-pcmtest
Say 'Y' or 'M' to include support for the Virtual PCM test driver. This driver is aimed at extended testing of the userspace applications which use the ALSA API, as well as the PCM middle layer testing.
It can generate random or pattern-based data into the capture stream, check the playback stream for containing the selected pattern, inject time delays during capture/playback, redefine the RESET ioctl operation to perform the PCM middle layer testing and inject errors during the PCM callbacks. It supports both interleaved and non-interleaved access modes. You can find the corresponding selftest in the 'alsa' selftests folder.
Raw data from LKDDb:
lkddb module snd-pcmtest CONFIG_SND_PCMTEST : sound/drivers/Kconfig : "Virtual PCM test driver" # in 6.5–6.14, 6.15-rc+HEAD
lkddb platform "pcmtest" : CONFIG_SND CONFIG_SND_PCMTEST : sound/drivers/pcmtest.c # in 6.5–6.14, 6.15-rc+HEAD
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Automatically generated (in year 2025). See also LKDDb sources on GitLab