#include #include #include #include #include #include #include #include #include #include #include #include #include #include "ini.h" #include "bayer.h" enum io_method { IO_METHOD_READ, IO_METHOD_MMAP, IO_METHOD_USERPTR, }; struct buffer { void *start; size_t length; }; struct buffer *buffers; static int *outbuffer; static unsigned int n_buffers; static enum io_method io = IO_METHOD_MMAP; // Rear camera static char *rear_dev_name; static int *rear_entity_id; static char *rear_dev[20]; static int rear_width = -1; static int rear_height = -1; static int rear_rotate = 0; static int rear_fmt = V4L2_PIX_FMT_RGB24; static int rear_mbus = MEDIA_BUS_FMT_RGB888_1X24; // Front camera static char *front_dev_name; static int *front_entity_id; static char *front_dev[20]; static int front_width = -1; static int front_height = -1; static int front_rotate = 0; static int front_fmt = V4L2_PIX_FMT_RGB24; static int front_mbus = MEDIA_BUS_FMT_RGB888_1X24; // Camera interface static char *media_drv_name; static int *interface_entity_id; static char *dev_name[20]; static int media_fd; // State static int current_width = -1; static int current_height = -1; static int current_fmt = 0; static int current_rotate = 0; static int capture = 0; static cairo_surface_t *surface = NULL; static int preview_width = -1; static int preview_height = -1; // Widgets GObject *preview; static int xioctl(int fd, int request, void *arg) { int r; do { r = ioctl(fd, request, arg); } while (r == -1 && errno == EINTR); return r; } static void errno_exit(const char *s) { fprintf(stderr, "%s error %d, %s\n", s, errno, strerror(errno)); exit(EXIT_FAILURE); } static void start_capturing(int fd) { enum v4l2_buf_type type; switch (io) { case IO_METHOD_READ: /* Nothing to do. */ break; case IO_METHOD_MMAP: for (int i = 0; i < n_buffers; ++i) { struct v4l2_buffer buf = { .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, .memory = V4L2_MEMORY_MMAP, .index = i, }; if (xioctl(fd, VIDIOC_QBUF, &buf) == -1) { errno_exit("VIDIOC_QBUF"); } } type = V4L2_BUF_TYPE_VIDEO_CAPTURE; if (xioctl(fd, VIDIOC_STREAMON, &type) == -1) { errno_exit("VIDIOC_STREAMON"); } break; case IO_METHOD_USERPTR: for (int i = 0; i < n_buffers; ++i) { struct v4l2_buffer buf = { .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, .memory = V4L2_MEMORY_USERPTR, .index = i, }; buf.m.userptr = (unsigned long) buffers[i].start; buf.length = buffers[i].length; if (xioctl(fd, VIDIOC_QBUF, &buf) == -1) { errno_exit("VIDIOC_QBUF"); } } type = V4L2_BUF_TYPE_VIDEO_CAPTURE; if (xioctl(fd, VIDIOC_STREAMON, &type) == -1) { errno_exit("VIDIOC_STREAMON"); } break; } } static void init_mmap(int fd) { struct v4l2_requestbuffers req = {0}; req.count = 4; req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; req.memory = V4L2_MEMORY_MMAP; if (xioctl(fd, VIDIOC_REQBUFS, &req) == -1) { if (errno == EINVAL) { fprintf(stderr, "%s does not support memory mapping", *dev_name); exit(EXIT_FAILURE); } else { errno_exit("VIDIOC_REQBUFS"); } } if (req.count < 2) { fprintf(stderr, "Insufficient buffer memory on %s\n", *dev_name); exit(EXIT_FAILURE); } buffers = calloc(req.count, sizeof(buffers[0])); if (!buffers) { fprintf(stderr, "Out of memory\\n"); exit(EXIT_FAILURE); } for (n_buffers = 0; n_buffers < req.count; ++n_buffers) { struct v4l2_buffer buf = { .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, .memory = V4L2_MEMORY_MMAP, .index = n_buffers, }; if (xioctl(fd, VIDIOC_QUERYBUF, &buf) == -1) { errno_exit("VIDIOC_QUERYBUF"); } buffers[n_buffers].length = buf.length; buffers[n_buffers].start = mmap(NULL /* start anywhere */, buf.length, PROT_READ | PROT_WRITE /* required */, MAP_SHARED /* recommended */, fd, buf.m.offset); if (MAP_FAILED == buffers[n_buffers].start) { errno_exit("mmap"); } } } static void init_sensor(char* fn, int width, int height, int mbus) { int fd; struct v4l2_subdev_format fmt; fd = open(fn, O_RDWR); g_printerr("Setting sensor to %dx%d fmt %d\n", width, height, mbus); fmt.pad = 0; fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; fmt.format.code = mbus; fmt.format.width = width; fmt.format.height = height; fmt.format.field = V4L2_FIELD_ANY; if (xioctl(fd, VIDIOC_SUBDEV_S_FMT, &fmt) == -1) { errno_exit("VIDIOC_SUBDEV_S_FMT"); } g_printerr("Driver returned %dx%d fmt %d\n", fmt.format.width, fmt.format.height, fmt.format.code); close(fd); } static void init_device(int fd) { struct v4l2_capability cap; if (xioctl(fd, VIDIOC_QUERYCAP, &cap) == -1) { if (errno == EINVAL) { fprintf(stderr, "%s is no V4L2 device\n", *dev_name); exit(EXIT_FAILURE); } else { errno_exit("VIDIOC_QUERYCAP"); } } if (!(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)) { fprintf(stderr, "%s is no video capture device\n", *dev_name); exit(EXIT_FAILURE); } switch (io) { case IO_METHOD_READ: if (!(cap.capabilities & V4L2_CAP_READWRITE)) { fprintf(stderr, "%s does not support read i/o\n", *dev_name); exit(EXIT_FAILURE); } break; case IO_METHOD_MMAP: case IO_METHOD_USERPTR: if (!(cap.capabilities & V4L2_CAP_STREAMING)) { fprintf(stderr, "%s does not support streaming i/o\n", *dev_name); exit(EXIT_FAILURE); } break; } /* Select video input, video standard and tune here. */ struct v4l2_cropcap cropcap = { .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, }; struct v4l2_crop crop = {0}; if (xioctl(fd, VIDIOC_CROPCAP, &cropcap) == 0) { crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; crop.c = cropcap.defrect; /* reset to default */ if (xioctl(fd, VIDIOC_S_CROP, &crop) == -1) { switch (errno) { case EINVAL: /* Cropping not supported. */ break; default: /* Errors ignored. */ break; } } } else { /* Errors ignored. */ } struct v4l2_format fmt = { .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, }; if (current_width > 0) { g_printerr("Setting camera to %dx%d fmt %d\n", current_width, current_height, current_fmt); fmt.fmt.pix.width = current_width; fmt.fmt.pix.height = current_height; fmt.fmt.pix.pixelformat = current_fmt; fmt.fmt.pix.field = V4L2_FIELD_ANY; if (xioctl(fd, VIDIOC_S_FMT, &fmt) == -1) { errno_exit("VIDIOC_S_FMT"); } g_printerr("Driver returned %dx%d fmt %d\n", fmt.fmt.pix.width, fmt.fmt.pix.height, fmt.fmt.pix.pixelformat); /* Note VIDIOC_S_FMT may change width and height. */ } else { g_printerr("Querying camera format\n"); /* Preserve original settings as set by v4l2-ctl for example */ if (xioctl(fd, VIDIOC_G_FMT, &fmt) == -1) { errno_exit("VIDIOC_G_FMT"); } g_printerr("Driver returned %dx%d fmt %d\n", fmt.fmt.pix.width, fmt.fmt.pix.height, fmt.fmt.pix.pixelformat); current_width = fmt.fmt.pix.width; current_height = fmt.fmt.pix.height; } current_fmt = fmt.fmt.pix.pixelformat; /* Buggy driver paranoia. */ unsigned int min = fmt.fmt.pix.width * 2; if (fmt.fmt.pix.bytesperline < min) { fmt.fmt.pix.bytesperline = min; } min = fmt.fmt.pix.bytesperline * fmt.fmt.pix.height; if (fmt.fmt.pix.sizeimage < min) { fmt.fmt.pix.sizeimage = min; } switch (io) { case IO_METHOD_READ: //init_read(fmt.fmt.pix.sizeimage); break; case IO_METHOD_MMAP: init_mmap(fd); break; case IO_METHOD_USERPTR: //init_userp(fmt.fmt.pix.sizeimage); break; } } static void process_image(const int *p, int size) { clock_t t; time_t rawtime; struct tm tim; uint8_t *pixels; double time_taken; char fname[255]; char timestamp[30]; GdkPixbuf *pixbuf; GdkPixbuf *pixbufrot; GError *error = NULL; double scale; cairo_t *cr; t = clock(); dc1394bayer_method_t method = DC1394_BAYER_METHOD_DOWNSAMPLE; dc1394color_filter_t filter = DC1394_COLOR_FILTER_BGGR; if(capture){ method = DC1394_BAYER_METHOD_SIMPLE; // method = DC1394_BAYER_METHOD_VNG is slightly sharper but takes 10 seconds; pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, current_width, current_height); }else{ pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, current_width/2, current_height/2); } pixels = gdk_pixbuf_get_pixels(pixbuf); dc1394_bayer_decoding_8bit((const uint8_t*)p, pixels, current_width, current_height, filter, method); if (current_rotate == 0) { pixbufrot = pixbuf; } else if (current_rotate == 90) { pixbufrot = gdk_pixbuf_rotate_simple(pixbuf, GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE); } else if (current_rotate == 180) { pixbufrot = gdk_pixbuf_rotate_simple(pixbuf, GDK_PIXBUF_ROTATE_UPSIDEDOWN); } else if (current_rotate == 270) { pixbufrot = gdk_pixbuf_rotate_simple(pixbuf, GDK_PIXBUF_ROTATE_CLOCKWISE); } if (capture){ time(&rawtime); tim =*(localtime(&rawtime)); strftime(timestamp, 30, "%F %T", &tim); sprintf(fname, "%s/Pictures/Photo-%s.jpg", getenv("HOME"), timestamp); printf("Saving image\n"); gdk_pixbuf_save(pixbufrot, fname, "jpeg", &error, "quality", "85", NULL); if(error != NULL) { g_printerr(error->message); g_clear_error(&error); } } else { scale = (double)preview_width/gdk_pixbuf_get_width(pixbufrot); cr = cairo_create(surface); cairo_set_source_rgb(cr, 0,0,0); cairo_paint(cr); gdk_cairo_set_source_pixbuf(cr, pixbufrot, 0, 0); cairo_scale(cr, scale, scale); cairo_pattern_set_extend(cairo_get_source(cr), CAIRO_EXTEND_NONE); cairo_paint(cr); gtk_widget_queue_draw_area(preview, 0, 0, preview_width, preview_height); } capture = 0; t = clock() - t; time_taken = ((double)t)/CLOCKS_PER_SEC; printf("%f fps\n", 1.0/time_taken); } static gboolean preview_draw (GtkWidget *widget, cairo_t *cr, gpointer data) { cairo_set_source_surface(cr, surface, 0,0); cairo_paint(cr); return FALSE; } static gboolean preview_configure (GtkWidget *widget, GdkEventConfigure *event) { cairo_t *cr; if (surface) cairo_surface_destroy(surface); surface = gdk_window_create_similar_surface (gtk_widget_get_window(widget), CAIRO_CONTENT_COLOR, gtk_widget_get_allocated_width (widget), gtk_widget_get_allocated_height (widget)); preview_width = gtk_widget_get_allocated_width(widget); preview_height = gtk_widget_get_allocated_height(widget); cr = cairo_create(surface); cairo_set_source_rgb(cr, 0, 0, 0); cairo_paint(cr); cairo_destroy(cr); return TRUE; } static int read_frame(int fd) { struct v4l2_buffer buf = {0}; switch (io) { case IO_METHOD_READ: if (read(fd, buffers[0].start, buffers[0].length) == -1) { switch (errno) { case EAGAIN: return 0; case EIO: /* Could ignore EIO, see spec. */ /* fallthrough */ default: errno_exit("read"); break; } } process_image(buffers[0].start, buffers[0].length); break; case IO_METHOD_MMAP: buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; buf.memory = V4L2_MEMORY_MMAP; if (xioctl(fd, VIDIOC_DQBUF, &buf) == -1) { switch (errno) { case EAGAIN: return 0; case EIO: /* Could ignore EIO, see spec. */ /* fallthrough */ default: errno_exit("VIDIOC_DQBUF"); break; } } //assert(buf.index < n_buffers); process_image(buffers[buf.index].start, buf.bytesused); if (xioctl(fd, VIDIOC_QBUF, &buf) == -1) { errno_exit("VIDIOC_QBUF"); } break; case IO_METHOD_USERPTR: buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; buf.memory = V4L2_MEMORY_USERPTR; if (xioctl(fd, VIDIOC_DQBUF, &buf) == -1) { switch (errno) { case EAGAIN: return 0; case EIO: /* Could ignore EIO, see spec. */ /* fallthrough */ default: errno_exit("VIDIOC_DQBUF"); break; } } unsigned int i; for (i = 0; i < n_buffers; ++i) { if (buf.m.userptr == (unsigned long) buffers[i].start && buf.length == buffers[i].length) { break; } } //assert(i < n_buffers); process_image((void *) buf.m.userptr, buf.bytesused); if (xioctl(fd, VIDIOC_QBUF, &buf) == -1) { errno_exit("VIDIOC_QBUF"); } break; } return 1; } static gboolean get_frame(int fd) { while (1) { fd_set fds; struct timeval tv; int r; FD_ZERO(&fds); FD_SET(fd, &fds); /* Timeout. */ tv.tv_sec = 2; tv.tv_usec = 0; r = select(fd + 1, &fds, NULL, NULL, &tv); if (r == -1) { if (EINTR == errno) { continue; } errno_exit("select"); } else if (r == 0) { fprintf(stderr, "select timeout\\n"); exit(EXIT_FAILURE); } if (read_frame(fd)) { break; } /* EAGAIN - continue select loop. */ } return TRUE; } static int config_ini_handler(void *user, const char *section, const char *name, const char *value) { if (strcmp(section, "rear") == 0) { if (strcmp(name, "width") == 0) { rear_width = strtol(value, NULL, 10); } else if (strcmp(name, "height") == 0) { rear_height = strtol(value, NULL, 10); } else if (strcmp(name, "rotate") == 0) { rear_rotate = strtol(value, NULL, 10); } else if (strcmp(name, "fmt") == 0) { if (strcmp(value, "RGB") == 0) { rear_fmt = V4L2_PIX_FMT_RGB24; } else if (strcmp(value, "UYVY") == 0) { rear_fmt = V4L2_PIX_FMT_UYVY; } else if (strcmp(value, "YUYV") == 0) { rear_fmt = V4L2_PIX_FMT_YUYV; } else if (strcmp(value, "JPEG") == 0) { rear_fmt = V4L2_PIX_FMT_JPEG; } else if (strcmp(value, "NV12") == 0) { rear_fmt = V4L2_PIX_FMT_NV12; } else if (strcmp(value, "YUV420") == 0 || strcmp(value, "I420") == 0 || strcmp(value, "YU12") == 0) { rear_fmt = V4L2_PIX_FMT_YUV420; } else if (strcmp(value, "YVU420") == 0 || strcmp(value, "YV12") == 0) { rear_fmt = V4L2_PIX_FMT_YVU420; } else if (strcmp(value, "RGGB8") == 0) { rear_fmt = V4L2_PIX_FMT_SRGGB8; } else if (strcmp(value, "BGGR8") == 0) { rear_fmt = V4L2_PIX_FMT_SBGGR8; rear_mbus = MEDIA_BUS_FMT_SBGGR8_1X8; } else if (strcmp(value, "GRBG8") == 0) { rear_fmt = V4L2_PIX_FMT_SGRBG8; } else if (strcmp(value, "GBRG8") == 0) { rear_fmt = V4L2_PIX_FMT_SGBRG8; } else { g_printerr("Unsupported pixelformat %s\n", value); exit(1); } } else if (strcmp(name, "driver") == 0){ rear_dev_name = strdup(value); } else { g_printerr("Unknown key '%s' in [rear]\n", name); exit(1); } } else if (strcmp(section, "front") == 0) { if (strcmp(name, "width") == 0) { front_width = strtol(value, NULL, 10); } else if (strcmp(name, "height") == 0) { front_height = strtol(value, NULL, 10); } else if (strcmp(name, "rotate") == 0) { front_rotate = strtol(value, NULL, 10); } else if (strcmp(name, "fmt") == 0) { if (strcmp(value, "RGB") == 0) { front_fmt = V4L2_PIX_FMT_RGB24; } else if (strcmp(value, "UYVY") == 0) { front_fmt = V4L2_PIX_FMT_UYVY; } else if (strcmp(value, "YUYV") == 0) { front_fmt = V4L2_PIX_FMT_YUYV; } else if (strcmp(value, "JPEG") == 0) { front_fmt = V4L2_PIX_FMT_JPEG; } else if (strcmp(value, "NV12") == 0) { front_fmt = V4L2_PIX_FMT_NV12; } else if (strcmp(value, "YUV420") == 0 || strcmp(value, "I420") == 0 || strcmp(value, "YU12") == 0) { front_fmt = V4L2_PIX_FMT_YUV420; } else if (strcmp(value, "YVU420") == 0 || strcmp(value, "YV12") == 0) { front_fmt = V4L2_PIX_FMT_YVU420; } else if (strcmp(value, "RGGB8") == 0) { front_fmt = V4L2_PIX_FMT_SRGGB8; } else if (strcmp(value, "BGGR8") == 0) { front_fmt = V4L2_PIX_FMT_SBGGR8; front_mbus = MEDIA_BUS_FMT_SBGGR8_1X8; } else if (strcmp(value, "GRBG8") == 0) { front_fmt = V4L2_PIX_FMT_SGRBG8; } else if (strcmp(value, "GBRG8") == 0) { front_fmt = V4L2_PIX_FMT_SGBRG8; } else { g_printerr("Unsupported pixelformat %s\n", value); exit(1); } } else if (strcmp(name, "driver") == 0){ front_dev_name = strdup(value); } else { g_printerr("Unknown key '%s' in [front]\n", name); exit(1); } } else if (strcmp(section, "device") == 0) { if (strcmp(name, "csi") == 0) { media_drv_name = strdup(value); } else { g_printerr("Unknown key '%s' in [device]\n", name); exit(1); } } else { g_printerr("Unknown section '%s' in config file\n", section); exit(1); } return 1; } int find_dev_node(int maj, int min, char* fnbuf) { DIR *d; struct dirent *dir; struct stat info; d = opendir("/dev"); while ((dir = readdir(d)) != NULL) { sprintf(fnbuf, "/dev/%s", dir->d_name); stat(fnbuf, &info); if (!S_ISCHR(info.st_mode)){ continue; } if (major(info.st_rdev) == maj && minor(info.st_rdev) == min) { return 0; } } return -1; } int setup_rear() { struct media_link_desc link = {0}; // Disable the interface<->front link link.flags = 0; link.source.entity = front_entity_id; link.source.index = 0; link.sink.entity = interface_entity_id; link.sink.index = 0; if(xioctl(media_fd, MEDIA_IOC_SETUP_LINK, &link) < 0){ g_printerr("Could not disable front camera link\n"); return -1; } // Enable the interface<->rear link link.flags = MEDIA_LNK_FL_ENABLED; link.source.entity = rear_entity_id; link.source.index = 0; link.sink.entity = interface_entity_id; link.sink.index = 0; if(xioctl(media_fd, MEDIA_IOC_SETUP_LINK, &link) < 0){ g_printerr("Could not enable rear camera link\n"); return -1; } current_width = rear_width; current_height = rear_height; current_fmt = rear_fmt; current_rotate = rear_rotate; // Find camera node init_sensor(rear_dev, rear_width, rear_height, rear_mbus); return 0; } int setup_front() { struct media_link_desc link = {0}; // Disable the interface<->rear link link.flags = 0; link.source.entity = rear_entity_id; link.source.index = 0; link.sink.entity = interface_entity_id; link.sink.index = 0; if(xioctl(media_fd, MEDIA_IOC_SETUP_LINK, &link) < 0){ g_printerr("Could not disable front camera link\n"); return -1; } // Enable the interface<->rear link link.flags = MEDIA_LNK_FL_ENABLED; link.source.entity = front_entity_id; link.source.index = 0; link.sink.entity = interface_entity_id; link.sink.index = 0; if(xioctl(media_fd, MEDIA_IOC_SETUP_LINK, &link) < 0){ g_printerr("Could not enable rear camera link\n"); return -1; } current_width = front_width; current_height = front_height; current_fmt = front_fmt; current_rotate = front_rotate; // Find camera node init_sensor(front_dev, front_width, front_height, front_mbus); return 0; } int find_cameras() { struct media_entity_desc entity = {0}; int ret; int found = 0; while (1) { entity.id = entity.id | MEDIA_ENT_ID_FLAG_NEXT; ret = xioctl(media_fd, MEDIA_IOC_ENUM_ENTITIES, &entity); if (ret < 0){ break; } printf("At node %s, (0x%x)\n", entity.name, entity.type); if(strncmp(entity.name, front_dev_name, strlen(front_dev_name)) == 0) { front_entity_id = entity.id; find_dev_node(entity.dev.major, entity.dev.minor, front_dev); printf("Found front cam, is %s at %s\n", entity.name, front_dev); found++; } if(strncmp(entity.name, rear_dev_name, strlen(rear_dev_name)) == 0) { rear_entity_id = entity.id; find_dev_node(entity.dev.major, entity.dev.minor, rear_dev); printf("Found rear cam, is %s at %s\n", entity.name, rear_dev); found++; } if (entity.type == MEDIA_ENT_F_IO_V4L) { interface_entity_id = entity.id; find_dev_node(entity.dev.major, entity.dev.minor, dev_name); printf("Found v4l2 interface node at %s\n", dev_name); } } if(found < 2){ return -1; } return 0; } int find_media_fd() { DIR *d; struct dirent *dir; int fd; char fnbuf[20]; struct media_device_info mdi = {0}; d = opendir("/dev"); while ((dir = readdir(d)) != NULL) { if(strncmp(dir->d_name, "media", 5) == 0) { sprintf(fnbuf, "/dev/%s", dir->d_name); printf("Checking %s\n", fnbuf); fd = open(fnbuf, O_RDWR); xioctl(fd, MEDIA_IOC_DEVICE_INFO, &mdi); printf("Found media device: %s\n", mdi.driver); if (strcmp(mdi.driver, media_drv_name) == 0){ media_fd = fd; return 0; } close(fd); } } return 1; } void on_shutter_clicked(GtkWidget *widget, gpointer user_data) { capture = 1; } int main(int argc, char *argv[]) { if (argc != 2) { g_printerr("Usage: camera configfile\n"); return 1; } GError *error = NULL; gtk_init(&argc, &argv); g_object_set(gtk_settings_get_default(), "gtk-application-prefer-dark-theme", TRUE, NULL); GtkBuilder *builder = gtk_builder_new(); char *glade_file = "/usr/share/megapixels/ui/camera.glade"; if (access("camera.glade", F_OK) != -1) { glade_file = "camera.glade"; } if (gtk_builder_add_from_file(builder, glade_file, &error) == 0) { g_printerr("Error loading file: %s\n", error->message); g_clear_error(&error); return 1; } GObject *window = gtk_builder_get_object(builder, "window"); GObject *preview_box = gtk_builder_get_object(builder, "preview_box"); GObject *shutter = gtk_builder_get_object(builder, "shutter"); GObject *settings_btn = gtk_builder_get_object(builder, "settings"); preview = gtk_builder_get_object(builder, "preview"); g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL); g_signal_connect(shutter, "clicked", G_CALLBACK(on_shutter_clicked), NULL); g_signal_connect(preview, "draw", G_CALLBACK(preview_draw), NULL); g_signal_connect(preview, "configure-event", G_CALLBACK(preview_configure), NULL); GtkCssProvider *provider = gtk_css_provider_new(); if (access("camera.css", F_OK) != -1) { gtk_css_provider_load_from_path(provider, "camera.css", NULL); } else { gtk_css_provider_load_from_path(provider, "/usr/share/camera/ui/camera.css", NULL); } GtkStyleContext *context = gtk_widget_get_style_context(preview_box); gtk_style_context_add_provider(context, GTK_STYLE_PROVIDER(provider), GTK_STYLE_PROVIDER_PRIORITY_USER); int result = ini_parse(argv[1], config_ini_handler, NULL); if (result == -1) { g_printerr("Config file not found\n"); return 1; } else if (result == -2) { g_printerr("Could not allocate memory to parse config file\n"); return 1; } else if (result != 0) { g_printerr("Could not parse config file\n"); return 1; } if (find_media_fd() == -1) { g_printerr("Could not find the media node\n"); return 1; } if (find_cameras() == -1) { g_printerr("Could not find the cameras\n"); return 1; } setup_rear(); int fd = open(dev_name, O_RDWR); if (fd == -1) { g_printerr("Error opening video device: %s\n", dev_name); return 1; } init_device(fd); start_capturing(fd); // Get a new frame every 34ms ~30fps printf("window show\n"); gtk_widget_show(window); g_idle_add(get_frame, fd); gtk_main(); return 0; }