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pipewire/spa/plugins/alsa
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Stefan Binding 7f07448a80 spa: acp: Allow Volume control which supports mute to be used as a hardware mute 
Some devices have a hardware volume control, but not a dedicated
hardware mute control. In some of these cases, the volume control is
described as having a hardware mute when volume is 0. This is described
in the TLV information of the volume control, when the
SNDRV_CTL_TLVD_DB_SCALE_MUTE flag is set in the TLV structure.
If set, alsa-lib will set the minimum dB value to -99999.99dB, which
can be detected inside PipeWire.

PipeWire can then use this hardware volume control to apply hardware
mute, when set.

In order to be able to set volumes and mutes separately, changing the
volume whilst muted will save the value, but not write it to the
hardware. When the device is unmuted, the saved value will be restored.

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
2025-05-05 07:40:29 +00:00
..
acp spa: acp: Allow Volume control which supports mute to be used as a hardware mute 2025-05-05 07:40:29 +00:00
mixer acp: Sennheiser GSX stereo profile 2025-03-20 12:24:56 +00:00
90-pipewire-alsa.rules 90-pipewire-alsa.rules: Check firewire before pci 2025-02-07 16:43:52 +01:00
acp-tool.c spa: acp: make spa-acp-tool debug output easier to read 2025-03-09 16:15:56 +02:00
alsa-acp-device.c acp: remove channel limit from API 2025-04-04 15:46:03 +02:00
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 Fix typos 2024-05-22 09:19:34 +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-pcm: recognize headroom to calculate max_error and max_resync 2025-03-03 12:26:05 +01:00
alsa-pcm.h spa: acp: get and emit UCM information for SplitPCM devices 2024-12-21 16:03:19 +02:00
alsa-seq-bridge.c spa: alsa: support also MIDI-1.0 IO for ALSA seq 2025-03-10 18:12:54 +00:00
alsa-seq.c alsa-seq: add the source only on success 2025-04-28 09:47:22 +02:00
alsa-seq.h spa: fix ALSA UMP support detection in meson 2025-03-10 18:12:54 +00:00
alsa-udev.c alsa: add option to skip the busy check 2024-03-22 12:42:48 +01:00
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 alsa-compress-offload-sink: major sink rework 2023-02-24 14:15:13 +01:00
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