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control: add control objects

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Add control objects for all controllable properties on ports.
Try to link compatible control properties in autolink.
Allocate shared memory for the output property memory and configure
the io area on the ports when the controls are linked.
Send the shared memfd to clients when the io area is configured.
Add port_set_io support in remote.c, mmap the control io area and
set on the port.
Add some param helpers
Add volume control to export-source update the volume before
sending each buffer.
This commit is contained in:
Wim Taymans 2017-11-30 16:36:29 +01:00
parent 91a3670610
commit 541553be1c
19 changed files with 577 additions and 34 deletions
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20
src/modules/module-autolink.c
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@ -28,6 +28,7 @@
#include "pipewire/link.h"
#include "pipewire/log.h"
#include "pipewire/module.h"
#include "pipewire/control.h"
#include "pipewire/private.h"
struct impl {
@ -142,6 +143,23 @@ link_state_changed(void *data, enum pw_link_state old, enum pw_link_state state,
}
}
static void try_link_controls(struct impl *impl, struct pw_port *port, struct pw_port *target)
{
struct pw_control *cin, *cout;
int res;
spa_list_for_each(cout, &port->control_list[SPA_DIRECTION_OUTPUT], port_link) {
spa_list_for_each(cin, &target->control_list[SPA_DIRECTION_INPUT], port_link) {
pw_log_debug("controls %d <-> %d", cin->id, cout->id);
if (cin->id == cout->id) {
if ((res = pw_control_link(cout, cin)) < 0)
pw_log_error("failed to link controls: %s", spa_strerror(res));
}
}
}
}
static void
link_destroy(void *data)
{
@ -210,6 +228,8 @@ static void try_link_port(struct pw_node *node, struct pw_port *port, struct nod
spa_list_append(&info->links, &ld->l);
pw_link_register(link, NULL, pw_module_get_global(impl->module));
try_link_controls(impl, port, target);
return;
error: