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v4l2: add support fot G_CTRL

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Get the current values of the controls and add those to the Props.

Emit a Props param changed event when we update properties.
This commit is contained in:
Wim Taymans 2023-04-18 16:27:55 +02:00
parent 74b1b63c3d
commit b59766c3d1
2 changed files with 100 additions and 38 deletions
Download patch file Download diff file Expand all files Collapse all files

101
spa/plugins/v4l2/v4l2-source.c
View file

@ -63,7 +63,8 @@ struct buffer {
struct control {
uint32_t id;
uint32_t ctrl_id;
double value;
uint32_t type;
int32_t value;
};
struct port {
@ -148,6 +149,37 @@ struct impl {
#include "v4l2-utils.c"
static const struct spa_dict_item info_items[] = {
{ SPA_KEY_DEVICE_API, "v4l2" },
{ SPA_KEY_MEDIA_CLASS, "Video/Source" },
{ SPA_KEY_MEDIA_ROLE, "Camera" },
{ SPA_KEY_NODE_DRIVER, "true" },
};
static void emit_node_info(struct impl *this, bool full)
{
uint64_t old = full ? this->info.change_mask : 0;
if (full)
this->info.change_mask = this->info_all;
if (this->info.change_mask) {
this->info.props = &SPA_DICT_INIT_ARRAY(info_items);
spa_node_emit_info(&this->hooks, &this->info);
this->info.change_mask = old;
}
}
static void emit_port_info(struct impl *this, struct port *port, bool full)
{
uint64_t old = full ? port->info.change_mask : 0;
if (full)
port->info.change_mask = port->info_all;
if (port->info.change_mask) {
spa_node_emit_port_info(&this->hooks,
SPA_DIRECTION_OUTPUT, 0, &port->info);
port->info.change_mask = old;
}
}
static int port_get_format(struct port *port,
uint32_t index,
const struct spa_pod *filter,
@ -255,14 +287,40 @@ static int impl_node_enum_params(void *object, int seq,
case SPA_PARAM_Props:
{
struct props *p = &this->props;
struct spa_pod_frame f;
struct port *port = &this->out_ports[0];
uint32_t i;
if ((res = spa_v4l2_update_controls(this)) < 0) {
spa_log_error(this->log, "error: %s", spa_strerror(res));
return res;
}
switch (result.index) {
case 0:
param = spa_pod_builder_add_object(&b,
SPA_TYPE_OBJECT_Props, id,
spa_pod_builder_push_object(&b, &f, SPA_TYPE_OBJECT_Props, id);
spa_pod_builder_add(&b,
SPA_PROP_device, SPA_POD_String(p->device),
SPA_PROP_deviceName, SPA_POD_String(p->device_name),
SPA_PROP_deviceFd, SPA_POD_Int(p->device_fd));
SPA_PROP_deviceFd, SPA_POD_Int(p->device_fd),
0);
for (i = 0; i < port->n_controls; i++) {
struct control *c = &port->controls[i];
spa_pod_builder_prop(&b, c->id, 0);
switch (c->type) {
case SPA_TYPE_Int:
spa_pod_builder_int(&b, c->value);
break;
case SPA_TYPE_Bool:
spa_pod_builder_bool(&b, c->value);
break;
default:
spa_pod_builder_int(&b, c->value);
break;
}
}
param = spa_pod_builder_pop(&b, &f);
break;
default:
return 0;
@ -322,7 +380,9 @@ static int impl_node_set_param(void *object,
break;
}
}
this->info.change_mask |= SPA_NODE_CHANGE_MASK_PARAMS;
this->params[NODE_Props].flags ^= SPA_PARAM_INFO_SERIAL;
emit_node_info(this, true);
break;
}
default:
@ -399,37 +459,6 @@ static int impl_node_send_command(void *object, const struct spa_command *comman
return 0;
}
static const struct spa_dict_item info_items[] = {
{ SPA_KEY_DEVICE_API, "v4l2" },
{ SPA_KEY_MEDIA_CLASS, "Video/Source" },
{ SPA_KEY_MEDIA_ROLE, "Camera" },
{ SPA_KEY_NODE_DRIVER, "true" },
};
static void emit_node_info(struct impl *this, bool full)
{
uint64_t old = full ? this->info.change_mask : 0;
if (full)
this->info.change_mask = this->info_all;
if (this->info.change_mask) {
this->info.props = &SPA_DICT_INIT_ARRAY(info_items);
spa_node_emit_info(&this->hooks, &this->info);
this->info.change_mask = old;
}
}
static void emit_port_info(struct impl *this, struct port *port, bool full)
{
uint64_t old = full ? port->info.change_mask : 0;
if (full)
port->info.change_mask = port->info_all;
if (port->info.change_mask) {
spa_node_emit_port_info(&this->hooks,
SPA_DIRECTION_OUTPUT, 0, &port->info);
port->info.change_mask = old;
}
}
static int
impl_node_add_listener(void *object,
struct spa_hook *listener,

37
spa/plugins/v4l2/v4l2-utils.c
View file

@ -1139,10 +1139,9 @@ spa_v4l2_enum_controls(struct impl *this, int seq,
spa_log_debug(this->log, "Control '%s' %d %d", queryctrl.name, prop_id, ctrl_id);
port->n_controls++;
switch (queryctrl.type) {
case V4L2_CTRL_TYPE_INTEGER:
port->controls[port->n_controls].type = SPA_TYPE_Int;
param = spa_pod_builder_add_object(&b,
SPA_TYPE_OBJECT_PropInfo, SPA_PARAM_PropInfo,
SPA_PROP_INFO_id, SPA_POD_Id(prop_id),
@ -1154,6 +1153,7 @@ spa_v4l2_enum_controls(struct impl *this, int seq,
SPA_PROP_INFO_description, SPA_POD_String(queryctrl.name));
break;
case V4L2_CTRL_TYPE_BOOLEAN:
port->controls[port->n_controls].type = SPA_TYPE_Bool;
param = spa_pod_builder_add_object(&b,
SPA_TYPE_OBJECT_PropInfo, SPA_PARAM_PropInfo,
SPA_PROP_INFO_id, SPA_POD_Id(prop_id),
@ -1165,6 +1165,7 @@ spa_v4l2_enum_controls(struct impl *this, int seq,
struct v4l2_querymenu querymenu;
struct spa_pod_builder_state state;
port->controls[port->n_controls].type = SPA_TYPE_Int;
spa_pod_builder_push_object(&b, &f[0], SPA_TYPE_OBJECT_PropInfo, SPA_PARAM_PropInfo);
spa_pod_builder_add(&b,
SPA_PROP_INFO_id, SPA_POD_Id(prop_id),
@ -1205,6 +1206,9 @@ spa_v4l2_enum_controls(struct impl *this, int seq,
goto next;
}
port->n_controls++;
if (spa_pod_filter(&b, &result.param, param, filter) < 0)
goto next;
@ -1219,6 +1223,35 @@ spa_v4l2_enum_controls(struct impl *this, int seq,
return res;
}
static int
spa_v4l2_update_controls(struct impl *this)
{
struct port *port = &this->out_ports[0];
struct spa_v4l2_device *dev = &port->dev;
int res;
uint32_t i;
if ((res = spa_v4l2_open(dev, this->props.device)) < 0)
return res;
for (i = 0; i < port->n_controls; i++) {
struct control *c = &port->controls[i];
struct v4l2_control control;
spa_zero(control);
control.id = c->ctrl_id;
if (xioctl(dev->fd, VIDIOC_G_CTRL, &control) < 0) {
res = -errno;
goto done;
}
c->value = control.value;
}
res = 0;
done:
spa_v4l2_close(dev);
return res;
}
static int
spa_v4l2_set_control(struct impl *this, uint32_t id,
const struct spa_pod_prop *prop)