A GTK3 camera application that knows how to deal with the media request api
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#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);