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spa: alsa: Add a mechanism for external volume control

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Currently enabled at device creation and delegated to an external entity
via a varlink protocol.
This commit is contained in:
Arun Raghavan 2026-02-11 15:06:56 -08:00
parent 6e1fe332ef
commit ce6961bc08
9 changed files with 758 additions and 88 deletions
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9
spa/plugins/alsa/acp/acp.h
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@ -11,6 +11,11 @@
#include <poll.h>
#include <string.h>
#include <spa/param/audio/volume.h>
#include <spa/support/varlink.h>
#include "ext-volume.h"
#ifdef __cplusplus
extern "C" {
#else
@ -239,6 +244,8 @@ struct acp_device {
int64_t latency_ns;
uint32_t codecs[32];
uint32_t n_codecs;
uint32_t ext_volume_flags;
};
struct acp_card_profile {
@ -277,6 +284,8 @@ struct acp_card {
struct acp_port **ports;
uint32_t preferred_input_port_index;
uint32_t preferred_output_port_index;
struct spa_acp_ext_volume ext_volume;
};
struct acp_card *acp_card_new(uint32_t index, const struct acp_dict *props);