186 lines
5.5 KiB
C
186 lines
5.5 KiB
C
#include "camera.h"
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#include "device.h"
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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double get_time()
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{
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struct timeval t;
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struct timezone tzp;
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gettimeofday(&t, &tzp);
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return t.tv_sec + t.tv_usec*1e-6;
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}
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void on_capture(MPImage image, void *user_data)
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{
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size_t num_bytes = mp_pixel_format_width_to_bytes(image.pixel_format, image.width) * image.height;
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uint8_t *data = malloc(num_bytes);
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memcpy(data, image.data, num_bytes);
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printf(" first byte: %d.", data[0]);
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free(data);
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}
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int main(int argc, char *argv[])
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{
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if (argc != 2 && argc != 3) {
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printf("Usage: ./test_camera <media_device_name> [<sub_device_name>]\n");
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return 1;
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}
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char *video_name = argv[1];
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char *subdev_name = NULL;
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if (argc == 3) {
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subdev_name = argv[2];
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}
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double find_start = get_time();
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// First find the device
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MPDevice *device = mp_device_find(video_name);
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if (!device) {
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printf("Device not found\n");
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return 1;
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}
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double find_end = get_time();
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printf("Finding the device took %fms\n", (find_end - find_start) * 1000);
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int video_fd;
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uint32_t video_entity_id;
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{
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const struct media_v2_entity *entity = mp_device_find_entity(device, video_name);
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if (!entity) {
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printf("Unable to find video device interface\n");
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return 1;
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}
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video_entity_id = entity->id;
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const struct media_v2_interface *iface = mp_device_find_entity_interface(device, video_entity_id);
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char buf[256];
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if (!mp_find_device_path(iface->devnode, buf, 256)) {
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printf("Unable to find video device path\n");
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return 1;
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}
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video_fd = open(buf, O_RDWR);
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if (video_fd == -1) {
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printf("Unable to open video device\n");
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return 1;
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}
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}
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int subdev_fd = -1;
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if (subdev_name)
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{
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const struct media_v2_entity *entity = mp_device_find_entity(device, subdev_name);
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if (!entity) {
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printf("Unable to find sub-device\n");
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return 1;
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}
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const struct media_v2_pad *source_pad = mp_device_get_pad_from_entity(device, entity->id);
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const struct media_v2_pad *sink_pad = mp_device_get_pad_from_entity(device, video_entity_id);
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// Disable other links
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const struct media_v2_entity *entities = mp_device_get_entities(device);
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for (int i = 0; i < mp_device_get_num_entities(device); ++i) {
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if (entities[i].id != video_entity_id && entities[i].id != entity->id) {
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const struct media_v2_pad *pad = mp_device_get_pad_from_entity(device, entities[i].id);
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mp_device_setup_link(device, pad->id, sink_pad->id, false);
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}
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}
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// Then enable ours
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mp_device_setup_link(device, source_pad->id, sink_pad->id, true);
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const struct media_v2_interface *iface = mp_device_find_entity_interface(device, entity->id);
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char buf[256];
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if (!mp_find_device_path(iface->devnode, buf, 256)) {
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printf("Unable to find sub-device path\n");
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return 1;
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}
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subdev_fd = open(buf, O_RDWR);
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if (subdev_fd == -1) {
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printf("Unable to open sub-device\n");
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return 1;
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}
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}
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double open_end = get_time();
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printf("Opening the device took %fms\n", (open_end - find_end) * 1000);
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MPCamera *camera = mp_camera_new(video_fd, subdev_fd);
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MPControlList *controls = mp_camera_list_controls(camera);
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double control_list_end = get_time();
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printf("Available controls: (took %fms)\n", (control_list_end - open_end) * 1000);
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for (MPControlList *list = controls; list; list = mp_control_list_next(list)) {
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MPControl *c = mp_control_list_get(list);
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printf(" %32s id:%s type:%s default:%d\n", c->name, mp_control_id_to_str(c->id), mp_control_type_to_str(c->type), c->default_value);
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}
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double mode_list_begin = get_time();
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MPCameraModeList *modes = mp_camera_list_available_modes(camera);
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double mode_list_end = get_time();
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printf("Available modes: (took %fms)\n", (mode_list_end - mode_list_begin) * 1000);
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for (MPCameraModeList *list = modes; list; list = mp_camera_mode_list_next(list)) {
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MPCameraMode *m = mp_camera_mode_list_get(list);
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printf(" %dx%d interval:%d/%d fmt:%s\n", m->width, m->height, m->frame_interval.numerator, m->frame_interval.denominator, mp_pixel_format_to_str(m->pixel_format));
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// Skip really slow framerates
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if (m->frame_interval.denominator < 15) {
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printf(" Skipping…\n");
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continue;
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}
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double start_capture = get_time();
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mp_camera_set_mode(camera, m);
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mp_camera_start_capture(camera);
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double last = get_time();
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printf(" Testing 10 captures, starting took %fms\n", (last - start_capture) * 1000);
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for (int i = 0; i < 10; ++i) {
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mp_camera_capture_image(camera, on_capture, NULL);
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double now = get_time();
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printf(" capture took %fms\n", (now - last) * 1000);
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last = now;
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}
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mp_camera_stop_capture(camera);
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}
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double cleanup_start = get_time();
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mp_camera_free(camera);
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close(video_fd);
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if (subdev_fd != -1)
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close(subdev_fd);
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mp_device_close(device);
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double cleanup_end = get_time();
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printf("Cleanup took %fms\n", (cleanup_end - cleanup_start) * 1000);
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}
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