pipewire/spa/plugins/alsa
Wim Taymans fb74ab9054 alsa: add volume limits
Add 3 levels of volume limits.

1. Add api.acp.min-volume and api.acp.max-valume on the ACP devices that
   is applied to all noded from this device
2. Add api.acp.device.<node-name>.min-volume and
   api.acp.device.<node-name>.max-volume that is applied to all nodes
   from the device with the given node-name.
3. Add api.acp.port.<port-name>.min-volume and
   api.acp.port.<port-name>.max-volume that is applied to all ports
   from the device with the given port-name.

The volume settings on an ALSA nodes can either go through the device on
the Routes (ports) to control the hardware mixer volumes and then the
remainder is performed on the nodes in software by the channel mixer.

We need to set the limits on the channel mixer when the hardware mixer
does not have routes.

This is not an easy way to set the volume limits but it provides a
static configuration option to enforce the limits. An easier
configuration option will also make it easier to change/bypass the
limits, which these options can guard against.

See #5266, #4323, #1517
2026-06-08 10:46:56 +02:00
..
acp alsa: add volume limits 2026-06-08 10:46:56 +02:00
mixer acp: partially revert f76327e076 2026-04-28 12:01:06 +02:00
90-pipewire-alsa.rules alsa-card-profiles: Add config for a couple of JBL gaming headsets 2026-01-22 15:35:05 +00:00
acp-tool.c spa/plugins: include <stdlib.h> for alloca() on non-linux 2026-03-12 09:21:40 +00:00
alsa-acp-device.c Add explicit cast to struct spa_event * result of spa_pod_builder_pop 2026-05-11 09:53:18 +00:00
alsa-compress-offload-device.c spa: alsa: avoid potential uninitialized variable use 2024-09-18 19:54:13 +00:00
alsa-compress-offload-sink.c treewide: replace EBADFD with posix EBADF 2026-05-27 13:36:39 +02:00
alsa-pcm-device.c spa: alsa: avoid potential uninitialized variable use 2024-09-18 19:54:13 +00:00
alsa-pcm-sink.c spa: acp: get and emit UCM information for SplitPCM devices 2024-12-21 16:03:19 +02:00
alsa-pcm-source.c spa: acp: get and emit UCM information for SplitPCM devices 2024-12-21 16:03:19 +02:00
alsa-pcm.c alsa: avoid rounding down period_size 2026-06-04 16:54:37 +02:00
alsa-pcm.h spa: alsa: actually set the channel map when use-chmap=true 2026-01-05 15:37:05 +00:00
alsa-seq-bridge.c alsa-seq: add : between client and port name 2026-04-15 11:20:18 +02:00
alsa-seq.c midi: don't write trailing continuation 0xf0 for SysEx 2026-06-01 13:08:11 +02:00
alsa-seq.h alsa-seq: handle SysEx without snd_midi_event_t 2026-05-21 12:45:43 +02:00
alsa-udev.c security: bound alloca size for udev property strings 2026-04-29 14:22:33 +02:00
alsa.c meson: fix build with missing libudev-devel 2024-02-06 11:49:40 +01:00
alsa.h spa: remove unnecessary indirection for some spa_log_topics 2023-10-06 13:08:24 +00:00
compress-offload-api-util.c alsa-compress-offload: Add device object and udev based autodetection 2023-09-02 08:28:22 +00:00
compress-offload-api-util.h alsa-compress-offload: Add device object and udev based autodetection 2023-09-02 08:28:22 +00:00
compress-offload-api.c treewide: replace EBADFD with posix EBADF 2026-05-27 13:36:39 +02:00
compress-offload-api.h alsa-compress-offload: Add device object and udev based autodetection 2023-09-02 08:28:22 +00:00
meson.build meson: fix build with missing libudev-devel 2024-02-06 11:49:40 +01:00
test-hw-params.c treewide: use SPDX tags to specify copyright information 2023-02-16 10:54:48 +00:00
test-timer.c fix compilation some more 2024-06-18 15:41:12 +02:00