Megapixels/tools/list_devices.c

#include "device.h"
#include <linux/media.h>
#include <stdio.h>

int
main(int argc, char *argv[])
{
        MPDeviceList *list = mp_device_list_new();

        while (list) {
                MPDevice *device = mp_device_list_get(list);

                const struct media_device_info *info = mp_device_get_info(device);
                printf("%s (%s) %s\n", info->model, info->driver, info->serial);
                printf("  Bus Info: %s\n", info->bus_info);
                printf("  Media Version: %d\n", info->media_version);
                printf("  HW Revision: %d\n", info->hw_revision);
                printf("  Driver Version: %d\n", info->driver_version);

                const struct media_v2_entity *entities =
                        mp_device_get_entities(device);
                size_t num = mp_device_get_num_entities(device);
                printf("  Entities (%ld):\n", num);
                for (int i = 0; i < num; ++i) {
                        printf("    %d %s (%d)\n",
                               entities[i].id,
                               entities[i].name,
                               entities[i].function);
                }

                const struct media_v2_interface *interfaces =
                        mp_device_get_interfaces(device);
                num = mp_device_get_num_interfaces(device);
                printf("  Interfaces (%ld):\n", num);
                for (int i = 0; i < num; ++i) {
                        printf("    %d (%d - %d) devnode %d:%d\n",
                               interfaces[i].id,
                               interfaces[i].intf_type,
                               interfaces[i].flags,
                               interfaces[i].devnode.major,
                               interfaces[i].devnode.minor);
                }

                const struct media_v2_pad *pads = mp_device_get_pads(device);
                num = mp_device_get_num_pads(device);
                printf("  Pads (%ld):\n", num);
                for (int i = 0; i < num; ++i) {
                        printf("    %d for device:%d (%d)\n",
                               pads[i].id,
                               pads[i].entity_id,
                               pads[i].flags);
                }

                const struct media_v2_link *links = mp_device_get_links(device);
                num = mp_device_get_num_links(device);
                printf("  Links (%ld):\n", num);
                for (int i = 0; i < num; ++i) {
                        printf("    %d from:%d to:%d (%d)\n",
                               links[i].id,
                               links[i].source_id,
                               links[i].sink_id,
                               links[i].flags);
                }

                list = mp_device_list_next(list);
        }

        mp_device_list_free(list);
}