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libcamera: map controls to standard ids

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Map the control id from libcamera to standard pipewire ones and
vice versa.
This commit is contained in:
Wim Taymans 2023-02-05 10:27:47 +01:00
parent 50a1e2db22
commit 73cc5d1dde
1 changed files with 43 additions and 3 deletions
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46
spa/plugins/libcamera/libcamera-utils.cpp
View file

@ -35,6 +35,7 @@
#include <limits.h> #include <limits.h>
#include <linux/media.h> #include <linux/media.h>
#include <libcamera/control_ids.h>
int spa_libcamera_open(struct impl *impl) int spa_libcamera_open(struct impl *impl)
{ {
@ -458,6 +459,38 @@ error:
} }
static struct {
uint32_t id;
uint32_t spa_id;
} control_map[] = {
{ libcamera::controls::BRIGHTNESS, SPA_PROP_brightness },
{ libcamera::controls::CONTRAST, SPA_PROP_contrast },
{ libcamera::controls::SATURATION, SPA_PROP_saturation },
{ libcamera::controls::EXPOSURE_TIME, SPA_PROP_exposure },
{ libcamera::controls::ANALOGUE_GAIN, SPA_PROP_gain },
{ libcamera::controls::SHARPNESS, SPA_PROP_sharpness },
};
static uint32_t control_to_prop_id(struct impl *impl, uint32_t control_id)
{
SPA_FOR_EACH_ELEMENT_VAR(control_map, c) {
if (c->id == control_id)
return c->spa_id;
}
return SPA_PROP_START_CUSTOM + control_id;
}
static uint32_t prop_id_to_control(struct impl *impl, uint32_t prop_id)
{
SPA_FOR_EACH_ELEMENT_VAR(control_map, c) {
if (c->spa_id == prop_id)
return c->id;
}
if (prop_id >= SPA_PROP_START_CUSTOM)
return prop_id - SPA_PROP_START_CUSTOM;
return SPA_ID_INVALID;
}
static int static int
spa_libcamera_enum_controls(struct impl *impl, struct port *port, int seq, spa_libcamera_enum_controls(struct impl *impl, struct port *port, int seq,
uint32_t start, uint32_t num, uint32_t start, uint32_t num,
@ -469,7 +502,7 @@ spa_libcamera_enum_controls(struct impl *impl, struct port *port, int seq,
struct spa_pod_frame f[2]; struct spa_pod_frame f[2];
struct spa_result_node_params result; struct spa_result_node_params result;
struct spa_pod *ctrl; struct spa_pod *ctrl;
uint32_t count = 0, skip; uint32_t count = 0, skip, id;
int res; int res;
const ControlId *ctrl_id; const ControlId *ctrl_id;
ControlInfo ctrl_info; ControlInfo ctrl_info;
@ -492,10 +525,12 @@ next:
ctrl_id = it->first; ctrl_id = it->first;
ctrl_info = it->second; ctrl_info = it->second;
id = control_to_prop_id(impl, ctrl_id->id());
spa_pod_builder_init(&b, buffer, sizeof(buffer)); spa_pod_builder_init(&b, buffer, sizeof(buffer));
spa_pod_builder_push_object(&b, &f[0], SPA_TYPE_OBJECT_PropInfo, SPA_PARAM_PropInfo); spa_pod_builder_push_object(&b, &f[0], SPA_TYPE_OBJECT_PropInfo, SPA_PARAM_PropInfo);
spa_pod_builder_add(&b, spa_pod_builder_add(&b,
SPA_PROP_INFO_id, SPA_POD_Id(ctrl_id->id()), SPA_PROP_INFO_id, SPA_POD_Id(id),
SPA_PROP_INFO_description, SPA_POD_String(ctrl_id->name().c_str()), SPA_PROP_INFO_description, SPA_POD_String(ctrl_id->name().c_str()),
0); 0);
@ -601,8 +636,13 @@ spa_libcamera_set_control(struct impl *impl, const struct spa_pod_prop *prop)
const ControlId *ctrl_id; const ControlId *ctrl_id;
int res; int res;
struct val d; struct val d;
uint32_t control_id;
auto v = info.idmap().find(prop->key); control_id = prop_id_to_control(impl, prop->key);
if (control_id == SPA_ID_INVALID)
return -ENOENT;
auto v = info.idmap().find(control_id);
if (v == info.idmap().end()) if (v == info.idmap().end())
return -ENOENT; return -ENOENT;