mirror of
https://gitlab.freedesktop.org/pipewire/pipewire
synced 2024-09-20 00:11:31 +00:00
b2c38a2b3b
Use manager to hotplug devices Use StreamConfig to enumerate formats
413 lines
9.9 KiB
C++
413 lines
9.9 KiB
C++
/* Spa libcamera manager
|
|
*
|
|
* Copyright © 2021 Wim Taymans
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the next
|
|
* paragraph) shall be included in all copies or substantial portions of the
|
|
* Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
* DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#include <stddef.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <limits.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
|
|
|
|
#include <libcamera/camera.h>
|
|
#include <libcamera/camera_manager.h>
|
|
|
|
#include <linux/videodev2.h>
|
|
|
|
using namespace libcamera;
|
|
|
|
#include <spa/support/log.h>
|
|
#include <spa/utils/type.h>
|
|
#include <spa/utils/keys.h>
|
|
#include <spa/utils/names.h>
|
|
#include <spa/utils/result.h>
|
|
#include <spa/utils/string.h>
|
|
#include <spa/support/loop.h>
|
|
#include <spa/support/plugin.h>
|
|
#include <spa/monitor/device.h>
|
|
#include <spa/monitor/utils.h>
|
|
|
|
#include "libcamera.h"
|
|
#include "libcamera-manager.hpp"
|
|
|
|
#define MAX_DEVICES 64
|
|
|
|
struct global {
|
|
int ref;
|
|
CameraManager *manager;
|
|
};
|
|
|
|
static struct global global;
|
|
|
|
struct device {
|
|
uint32_t id;
|
|
std::shared_ptr<Camera> camera;
|
|
};
|
|
|
|
typedef struct impl {
|
|
struct spa_handle handle;
|
|
struct spa_device device;
|
|
|
|
struct spa_log *log;
|
|
struct spa_loop *main_loop;
|
|
|
|
struct spa_hook_list hooks;
|
|
|
|
uint64_t info_all;
|
|
struct spa_device_info info;
|
|
|
|
CameraManager *manager;
|
|
void addCamera(std::shared_ptr<libcamera::Camera> camera);
|
|
void removeCamera(std::shared_ptr<libcamera::Camera> camera);
|
|
|
|
struct device devices[MAX_DEVICES];
|
|
uint32_t n_devices;
|
|
} Impl;
|
|
|
|
int libcamera_manager_release(CameraManager *manager)
|
|
{
|
|
if (global.manager != manager)
|
|
return -EINVAL;
|
|
|
|
if (--global.ref == 0) {
|
|
global.manager->stop();
|
|
delete global.manager;
|
|
global.manager = NULL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
CameraManager *libcamera_manager_acquire(void)
|
|
{
|
|
int res;
|
|
|
|
if (global.ref++ == 0) {
|
|
global.manager = new CameraManager();
|
|
if (global.manager == NULL)
|
|
return NULL;
|
|
|
|
if ((res = global.manager->start()) < 0) {
|
|
libcamera_manager_release(global.manager);
|
|
errno = -res;
|
|
return NULL;
|
|
}
|
|
}
|
|
return global.manager;
|
|
}
|
|
|
|
static struct device *add_device(struct impl *impl, std::shared_ptr<Camera> camera)
|
|
{
|
|
struct device *device;
|
|
uint32_t id;
|
|
|
|
if (impl->n_devices >= MAX_DEVICES)
|
|
return NULL;
|
|
id = impl->n_devices++;
|
|
device = &impl->devices[id];
|
|
device->id = id;
|
|
device->camera = camera;
|
|
return device;
|
|
}
|
|
|
|
static struct device *find_device(struct impl *impl, std::shared_ptr<Camera> camera)
|
|
{
|
|
uint32_t i;
|
|
for (i = 0; i < impl->n_devices; i++) {
|
|
if (impl->devices[i].camera == camera)
|
|
return &impl->devices[i];
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static void remove_device(struct impl *impl, struct device *device)
|
|
{
|
|
*device = impl->devices[--impl->n_devices];
|
|
}
|
|
|
|
static void clear_devices(struct impl *impl)
|
|
{
|
|
impl->n_devices = 0;
|
|
}
|
|
|
|
static int emit_object_info(struct impl *impl, struct device *device)
|
|
{
|
|
struct spa_device_object_info info;
|
|
uint32_t id = device->id;
|
|
struct spa_dict_item items[20];
|
|
struct spa_dict dict;
|
|
uint32_t n_items = 0;
|
|
char path[256];
|
|
|
|
info = SPA_DEVICE_OBJECT_INFO_INIT();
|
|
|
|
info.type = SPA_TYPE_INTERFACE_Device;
|
|
info.factory_name = SPA_NAME_API_LIBCAMERA_DEVICE;
|
|
info.change_mask = SPA_DEVICE_OBJECT_CHANGE_MASK_FLAGS |
|
|
SPA_DEVICE_OBJECT_CHANGE_MASK_PROPS;
|
|
info.flags = 0;
|
|
|
|
#define ADD_ITEM(key, value) items[n_items++] = SPA_DICT_ITEM_INIT(key, value)
|
|
ADD_ITEM(SPA_KEY_DEVICE_ENUM_API,"libcamera.manager");
|
|
ADD_ITEM(SPA_KEY_DEVICE_API, "libcamera");
|
|
ADD_ITEM(SPA_KEY_MEDIA_CLASS, "Video/Device");
|
|
snprintf(path, sizeof(path), "%s", device->camera->id().c_str());
|
|
ADD_ITEM(SPA_KEY_API_LIBCAMERA_PATH, path);
|
|
#undef ADD_ITEM
|
|
|
|
dict = SPA_DICT_INIT(items, n_items);
|
|
info.props = &dict;
|
|
spa_device_emit_object_info(&impl->hooks, id, &info);
|
|
|
|
return 1;
|
|
}
|
|
|
|
void Impl::addCamera(std::shared_ptr<Camera> camera)
|
|
{
|
|
struct impl *impl = this;
|
|
struct device *device;
|
|
|
|
spa_log_info(impl->log, "new camera");
|
|
|
|
if ((device = find_device(impl, camera)) != NULL)
|
|
return;
|
|
|
|
if ((device = add_device(impl, camera)) == NULL)
|
|
return;
|
|
|
|
emit_object_info(impl, device);
|
|
}
|
|
|
|
void Impl::removeCamera(std::shared_ptr<Camera> camera)
|
|
{
|
|
struct impl *impl = this;
|
|
struct device *device;
|
|
|
|
spa_log_info(impl->log, "camera removed");
|
|
if ((device = find_device(impl, camera)) == NULL)
|
|
return;
|
|
|
|
remove_device(impl, device);
|
|
}
|
|
|
|
static int start_monitor(struct impl *impl)
|
|
{
|
|
impl->manager->cameraAdded.connect(impl, &Impl::addCamera);
|
|
impl->manager->cameraRemoved.connect(impl, &Impl::removeCamera);
|
|
return 0;
|
|
}
|
|
|
|
static int stop_monitor(struct impl *impl)
|
|
{
|
|
if (impl->manager != NULL) {
|
|
impl->manager->cameraAdded.disconnect(impl, &Impl::addCamera);
|
|
impl->manager->cameraRemoved.disconnect(impl, &Impl::removeCamera);
|
|
}
|
|
clear_devices (impl);
|
|
return 0;
|
|
}
|
|
|
|
static int enum_devices(struct impl *impl)
|
|
{
|
|
auto cameras = impl->manager->cameras();
|
|
|
|
for (const std::shared_ptr<Camera> &cam : cameras) {
|
|
impl->addCamera(cam);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const struct spa_dict_item device_info_items[] = {
|
|
{ SPA_KEY_DEVICE_API, "libcamera" },
|
|
{ SPA_KEY_DEVICE_NICK, "libcamera-manager" },
|
|
};
|
|
|
|
static void emit_device_info(struct impl *impl, bool full)
|
|
{
|
|
uint64_t old = full ? impl->info.change_mask : 0;
|
|
if (full)
|
|
impl->info.change_mask = impl->info_all;
|
|
if (impl->info.change_mask) {
|
|
struct spa_dict dict;
|
|
dict = SPA_DICT_INIT_ARRAY(device_info_items);
|
|
impl->info.props = &dict;
|
|
spa_device_emit_info(&impl->hooks, &impl->info);
|
|
impl->info.change_mask = old;
|
|
}
|
|
}
|
|
|
|
static void impl_hook_removed(struct spa_hook *hook)
|
|
{
|
|
struct impl *impl = (struct impl*)hook->priv;
|
|
if (spa_hook_list_is_empty(&impl->hooks)) {
|
|
stop_monitor(impl);
|
|
if (impl->manager)
|
|
libcamera_manager_release(impl->manager);
|
|
impl->manager = NULL;
|
|
}
|
|
}
|
|
|
|
static int
|
|
impl_device_add_listener(void *object, struct spa_hook *listener,
|
|
const struct spa_device_events *events, void *data)
|
|
{
|
|
int res;
|
|
struct impl *impl = (struct impl*) object;
|
|
struct spa_hook_list save;
|
|
|
|
spa_return_val_if_fail(impl != NULL, -EINVAL);
|
|
spa_return_val_if_fail(events != NULL, -EINVAL);
|
|
|
|
impl->manager = libcamera_manager_acquire();
|
|
if (impl->manager == NULL)
|
|
return -errno;
|
|
|
|
spa_hook_list_isolate(&impl->hooks, &save, listener, events, data);
|
|
|
|
emit_device_info(impl, true);
|
|
|
|
if ((res = enum_devices(impl)) < 0)
|
|
return res;
|
|
|
|
if ((res = start_monitor(impl)) < 0)
|
|
return res;
|
|
|
|
spa_hook_list_join(&impl->hooks, &save);
|
|
|
|
listener->removed = impl_hook_removed;
|
|
listener->priv = impl;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct spa_device_methods impl_device = {
|
|
SPA_VERSION_DEVICE_METHODS,
|
|
.add_listener = impl_device_add_listener,
|
|
};
|
|
|
|
static int impl_get_interface(struct spa_handle *handle, const char *type, void **interface)
|
|
{
|
|
struct impl *impl;
|
|
|
|
spa_return_val_if_fail(handle != NULL, -EINVAL);
|
|
spa_return_val_if_fail(interface != NULL, -EINVAL);
|
|
|
|
impl = (struct impl *) handle;
|
|
|
|
if (spa_streq(type, SPA_TYPE_INTERFACE_Device))
|
|
*interface = &impl->device;
|
|
else
|
|
return -ENOENT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int impl_clear(struct spa_handle *handle)
|
|
{
|
|
struct impl *impl = (struct impl *) handle;
|
|
stop_monitor(impl);
|
|
if (impl->manager)
|
|
libcamera_manager_release(impl->manager);
|
|
impl->manager = NULL;
|
|
return 0;
|
|
}
|
|
|
|
static size_t
|
|
impl_get_size(const struct spa_handle_factory *factory,
|
|
const struct spa_dict *params)
|
|
{
|
|
return sizeof(struct impl);
|
|
}
|
|
|
|
static int
|
|
impl_init(const struct spa_handle_factory *factory,
|
|
struct spa_handle *handle,
|
|
const struct spa_dict *info,
|
|
const struct spa_support *support,
|
|
uint32_t n_support)
|
|
{
|
|
struct impl *impl;
|
|
|
|
spa_return_val_if_fail(factory != NULL, -EINVAL);
|
|
spa_return_val_if_fail(handle != NULL, -EINVAL);
|
|
|
|
handle->get_interface = impl_get_interface;
|
|
handle->clear = impl_clear;
|
|
|
|
impl = (struct impl *) handle;
|
|
|
|
impl->log = (struct spa_log*)spa_support_find(support, n_support, SPA_TYPE_INTERFACE_Log);
|
|
libcamera_log_topic_init(impl->log);
|
|
|
|
impl->main_loop = (struct spa_loop*)spa_support_find(support, n_support, SPA_TYPE_INTERFACE_Loop);
|
|
if (impl->main_loop == NULL) {
|
|
spa_log_error(impl->log, "a main-loop is needed");
|
|
return -EINVAL;
|
|
}
|
|
spa_hook_list_init(&impl->hooks);
|
|
|
|
impl->device.iface = SPA_INTERFACE_INIT(
|
|
SPA_TYPE_INTERFACE_Device,
|
|
SPA_VERSION_DEVICE,
|
|
&impl_device, impl);
|
|
|
|
impl->info = SPA_DEVICE_INFO_INIT();
|
|
impl->info_all = SPA_DEVICE_CHANGE_MASK_FLAGS |
|
|
SPA_DEVICE_CHANGE_MASK_PROPS;
|
|
impl->info.flags = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct spa_interface_info impl_interfaces[] = {
|
|
{SPA_TYPE_INTERFACE_Device,},
|
|
};
|
|
|
|
static int
|
|
impl_enum_interface_info(const struct spa_handle_factory *factory,
|
|
const struct spa_interface_info **info,
|
|
uint32_t *index)
|
|
{
|
|
spa_return_val_if_fail(factory != NULL, -EINVAL);
|
|
spa_return_val_if_fail(info != NULL, -EINVAL);
|
|
spa_return_val_if_fail(index != NULL, -EINVAL);
|
|
|
|
if (*index >= SPA_N_ELEMENTS(impl_interfaces))
|
|
return 0;
|
|
|
|
*info = &impl_interfaces[(*index)++];
|
|
return 1;
|
|
}
|
|
|
|
extern "C" {
|
|
const struct spa_handle_factory spa_libcamera_manager_factory = {
|
|
SPA_VERSION_HANDLE_FACTORY,
|
|
SPA_NAME_API_LIBCAMERA_ENUM_MANAGER,
|
|
NULL,
|
|
impl_get_size,
|
|
impl_init,
|
|
impl_enum_interface_info,
|
|
};
|
|
}
|