blob: 4c714764b826e4e9cf919f6b18d94d34f1859cf6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
Alsa Virtual Sound Driver
--------------------------
The ALSA Virtual Sound Driver (AVIRT) aims to provide a Linux kernel solution to the issue of audio routing in kernel-space, as well as security per-stream, and dynamic configuration of streams at the kernel level.
A top-level abstract dynamic audio driver is presented to the user-space via an ALSA middle-layer card. From there, respective low-level "real" audio drivers can subscribe to it as an "Audio Path".
The top-level driver is configured (currently) using module parameters, as is the norm for sound drivers in the Linux tree, however this will utilise a configfs configuration implementation in future.
A sample dummy Audio Path is provided as an example to show how a low-level audio driver would subscribe to AVIRT, and accept audio routing for playback.
## Building
### Out Of Tree
The kernel modules can be built either in-tree, or out-of-tree.
To build both AVIRT and the dummy Audio Path out-of-tree, use the following command:
```sh
$ CONFIG_AVIRT=m CONFIG_AVIRT_BUILDLOCAL=y CONFIG_AVIRT_DUMMYAPSUMMARY = "Instrument Cluster receiver application"
DESCRIPTION = "AGL demonstration instrument cluster XDG remote display application"
HOMEPAGE = "https://gerrit.automotivelinux.org/gerrit/#/admin/projects/apps/agl-cluster-demo-receiver"
SECTION = "apps"
LICENSE = "Apache-2.0 & MIT"
LIC_FILES_CHKSUM = "file://LICENSE;md5=374fee6a7817f1e1a5a7bfb7b7989553"
DEPENDS = " \
wayland wayland-native \
agl-compositor \
gstreamer1.0 gstreamer1.0-plugins-base gstreamer1.0-plugins-bad \
"
PV = "1.0+git${SRCPV}"
SRC_URI = "git://gerrit.automotivelinux.org/gerrit/apps/agl-cluster-demo-receiver;protocol=https;branch=${AGL_BRANCH} \
file://cluster-receiver.service \
"
SRCREV = "4af517a670a67ca6d9535784ecd5be0e95d659e0"
S = "${WORKDIR}/git"
inherit cmake pkgconfig
do_install:append() {
insta
|
