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pulse: use metadata to store default source/sink

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The metadata is implemented by the session manager and it can decide
what to do when the defaults change. It can also choose to save
(some of) the metadata to a database.

The metadata is also shared between applications so that changes can
be picked up immediately.
This commit is contained in:
Wim Taymans 2020-07-07 17:09:46 +02:00
parent 2991a814cd
commit ee54cb96aa
5 changed files with 232 additions and 11 deletions
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96
pipewire-pulseaudio/src/context.c
View file

@ -23,10 +23,12 @@
#include <spa/param/props.h>
#include <pipewire/pipewire.h>
#include <extensions/metadata.h>
#include <pulse/context.h>
#include <pulse/timeval.h>
#include <pulse/error.h>
#include <pulse/xmalloc.h>
#include "internal.h"
@ -402,7 +404,7 @@ static struct global *find_node_for_route(pa_context *c, struct global *card, ui
spa_list_for_each(n, &c->globals, link) {
if (strcmp(n->type, PW_TYPE_INTERFACE_Node) != 0)
continue;
pw_log_info("%d/%d %d/%d",
pw_log_debug("%d/%d %d/%d",
n->node_info.device_id, card->id,
n->node_info.profile_device_id, device);
if (n->node_info.device_id != card->id)
@ -936,6 +938,36 @@ struct global_info client_info = {
.destroy = client_destroy,
};
static int metadata_property(void *object,
uint32_t subject,
const char *key,
const char *type,
const char *value)
{
struct global *global = object;
return pa_metadata_update(global, subject, key, type, value);
}
static const struct pw_metadata_events metadata_events = {
PW_VERSION_METADATA_EVENTS,
.property = metadata_property,
};
static void metadata_destroy(void *data)
{
struct global *global = data;
pa_context *c = global->context;
if (c->metadata == global)
c->metadata = NULL;
pw_array_clear(&global->metadata_info.metadata);
}
struct global_info metadata_info = {
.version = PW_VERSION_METADATA,
.events = &metadata_events,
.destroy = metadata_destroy,
};
static void proxy_removed(void *data)
{
struct global *g = data;
@ -1091,6 +1123,12 @@ static int set_mask(pa_context *c, struct global *g)
!f->init)
emit_event(c, f, PA_SUBSCRIPTION_EVENT_CHANGE);
} else if (strcmp(g->type, PW_TYPE_INTERFACE_Metadata) == 0) {
if (c->metadata == NULL) {
ginfo = &metadata_info;
c->metadata = g;
}
pw_array_init(&g->metadata_info.metadata, 64);
} else {
return 0;
}
@ -1529,19 +1567,56 @@ pa_operation* pa_context_exit_daemon(pa_context *c, pa_context_success_cb_t cb,
return o;
}
struct default_node {
uint32_t mask;
pa_context_success_cb_t cb;
void *userdata;
char *name;
const char *key;
};
static void do_default_node(pa_operation *o, void *userdata)
{
struct default_node *d = userdata;
pa_context *c = o->context;
struct global *g;
int error = 0;
pw_log_debug("%p", c);
g = pa_context_find_global_by_name(c, d->mask, d->name);
if (g == NULL) {
error = PA_ERR_NOENTITY;
} else if (c->metadata) {
pw_metadata_set_property(c->metadata->proxy,
PW_ID_CORE, d->key, "text/plain", d->name);
} else {
error = PA_ERR_NOTIMPLEMENTED;
}
if (error != 0)
pa_context_set_error(c, error);
if (d->cb)
d->cb(c, error != 0 ? -1 : 1, d->userdata);
pa_operation_done(o);
pa_xfree(d->name);
}
SPA_EXPORT
pa_operation* pa_context_set_default_sink(pa_context *c, const char *name, pa_context_success_cb_t cb, void *userdata)
{
pa_operation *o;
struct success_data *d;
struct default_node *d;
o = pa_operation_new(c, NULL, on_success, sizeof(struct success_data));
pa_context_ensure_registry(c);
o = pa_operation_new(c, NULL, do_default_node, sizeof(*d));
d = o->userdata;
d->error = PA_ERR_NOTIMPLEMENTED;
d->mask = PA_SUBSCRIPTION_MASK_SINK;
d->name = pa_xstrdup(name);
d->key = "http://pipewire.org/metadata/default-audio-sink",
d->cb = cb;
d->userdata = userdata;
pa_operation_sync(o);
pw_log_warn("Not Implemented");
return o;
}
@ -1550,15 +1625,18 @@ SPA_EXPORT
pa_operation* pa_context_set_default_source(pa_context *c, const char *name, pa_context_success_cb_t cb, void *userdata)
{
pa_operation *o;
struct success_data *d;
struct default_node *d;
o = pa_operation_new(c, NULL, on_success, sizeof(struct success_data));
pa_context_ensure_registry(c);
o = pa_operation_new(c, NULL, do_default_node, sizeof(*d));
d = o->userdata;
d->error = PA_ERR_NOTIMPLEMENTED;
d->mask = PA_SUBSCRIPTION_MASK_SOURCE;
d->name = pa_xstrdup(name);
d->key = "http://pipewire.org/metadata/default-audio-source",
d->cb = cb;
d->userdata = userdata;
pa_operation_sync(o);
pw_log_warn("Not Implemented");
return o;
}