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alsa-monitor: parse device events

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Parse the device events and set the Props from the ObjectConfig
as the Props param on the node.
This propagates the software volume from the device to the
node.
This commit is contained in:
Wim Taymans 2020-07-06 17:26:01 +02:00
parent b9d412e618
commit 8e6b276d51
1 changed files with 31 additions and 1 deletions
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32
src/examples/media-session/alsa-monitor.c
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@ -33,6 +33,7 @@
#include <alsa/asoundlib.h> #include <alsa/asoundlib.h>
#include <spa/monitor/device.h> #include <spa/monitor/device.h>
#include <spa/monitor/event.h>
#include <spa/node/node.h> #include <spa/node/node.h>
#include <spa/node/keys.h> #include <spa/node/keys.h>
#include <spa/utils/result.h> #include <spa/utils/result.h>
@ -41,6 +42,7 @@
#include <spa/utils/keys.h> #include <spa/utils/keys.h>
#include <spa/param/props.h> #include <spa/param/props.h>
#include <spa/pod/builder.h> #include <spa/pod/builder.h>
#include <spa/pod/parser.h>
#include <spa/debug/dict.h> #include <spa/debug/dict.h>
#include <spa/debug/pod.h> #include <spa/debug/pod.h>
#include <spa/support/dbus.h> #include <spa/support/dbus.h>
@ -351,10 +353,38 @@ static void alsa_device_object_info(void *data, uint32_t id,
} }
} }
static void alsa_device_event(void *data, const struct spa_event *event)
{
struct device *device = data;
struct node *node;
uint32_t id, type;
struct spa_pod *props = NULL;
if (spa_pod_parse_object(&event->pod,
SPA_TYPE_EVENT_Device, &type,
SPA_EVENT_DEVICE_Object, SPA_POD_Int(&id),
SPA_EVENT_DEVICE_Props, SPA_POD_OPT_Pod(&props)) < 0)
return;
if ((node = alsa_find_node(device, id)) == NULL)
return;
switch (type) {
case SPA_DEVICE_EVENT_ObjectConfig:
if (props)
pw_node_set_param((struct pw_node*)node->snode->obj.proxy,
SPA_PARAM_Props, 0, props);
break;
default:
break;
}
}
static const struct spa_device_events alsa_device_events = { static const struct spa_device_events alsa_device_events = {
SPA_VERSION_DEVICE_EVENTS, SPA_VERSION_DEVICE_EVENTS,
.info = alsa_device_info, .info = alsa_device_info,
.object_info = alsa_device_object_info .object_info = alsa_device_object_info,
.event = alsa_device_event,
}; };
static struct device *alsa_find_device(struct impl *impl, uint32_t id) static struct device *alsa_find_device(struct impl *impl, uint32_t id)