PCM samples are transferred by the PCM interrupt routine from the memory of the ALSA playback device to the RAVENNA buffer and from the RAVENNA buffer to the memory of the ALSA capture device.
This patch will enabled the use of the ALSA plugins and it has been testes with the ALSA Dmix plugin.
This patch applies to issues #7 and #15.
This is the same approach already used with Linux Kernel 4.x, but in Linux Kernel 5.x tasklet_hrtimer helper functions were removed.
This fixes issue #12
- removed changes to driver/MTAL_LKernelAPI.c in ravenna-alsa-lkm-kernel-v5.patch
- added patch ravenna-alsa-lkm-disable-ptp-checksum.patch to the driver to the disable UDP checksum verification for the incoming PTP packets
- changed build.sh script to use new driver revision and apply the new patch
- added handling of the sink status flag "all_muted" in daemon, WebUI and regression tests
- updated documentation
- added patch to ravenna-alsa-lkm module to support AM824 codec and associated conversion functions
- added support for AM824 codec to daemon and in WebUI
- modifed demo to test 8 channels of AM824 with 6 samples per packet @ 48Khz (125us x packet)
- added patch to ALSA RAVENNA/AES67 Driver
- switched to CLANG compiler in order to compile the daemon succesfully
- disabled valgind memory check in daemon regression tests for ARM.
Demo and daemon regression test work properly.
Tests have been executed on the BeagleBone® Black board with ARM Cortex-A8 32-Bit and Ubuntu 18.04 distro
