start a photobooth sample program

1 files changed, 125 insertions, 0 deletions

diff --git a/examples/sample-photobooth.c b/examples/sample-photobooth.c
new file mode 100644
index 000000000..c96378ab8
--- /dev/null
+++ b/examples/sample-photobooth.c
@@ -0,0 +1,125 @@
+/* compile with gcc -Wall -o sample-photobooth -lgphoto2 sample-photobooth.c
+ * 
+ */
+
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include <signal.h>
+#include <gphoto2/gphoto2.h>
+
+#include "samples.h"
+
+static void errordumper(GPLogLevel level, const char *domain, const char *str,
+                 void *data) {
+/*	printf("%s (data %p)\n", str,data);*/
+}
+
+/* set by signal handler */
+static int capture_now = 0;
+static int read_config = 0;
+
+static int
+capture_to_file(Camera *camera, GPContext *context, char *fn) {
+	int fd, retval;
+	CameraFile *file;
+	CameraFilePath camera_file_path;
+
+	retval = gp_camera_capture(camera, GP_CAPTURE_IMAGE, &camera_file_path, context);
+	if (retval < GP_OK) return retval;
+
+	fd = open(fn, O_CREAT | O_WRONLY, 0644);
+	retval = gp_file_new_from_fd(&file, fd);
+	if (retval < GP_OK) {
+		close(fd);
+		unlink(fn);
+		return retval;
+	}
+
+	retval = gp_camera_file_get(camera, camera_file_path.folder, camera_file_path.name,
+		     GP_FILE_TYPE_NORMAL, file, context);
+	if (retval < GP_OK) {
+		gp_file_free(file);
+		unlink(fn);
+		return retval;
+	}
+
+	retval = gp_camera_file_delete(camera, camera_file_path.folder, camera_file_path.name, context);
+	gp_file_free(file);
+	return GP_OK;
+}
+
+static void
+sig_handler_capture_now (int sig_num)
+{
+        signal (SIGUSR1, sig_handler_capture_now);
+        capture_now = 1;
+}
+
+static void
+sig_handler_read_config (int sig_num)
+{
+        signal (SIGUSR2, sig_handler_read_config);
+        read_config = 1;
+}
+
+int
+main(int argc, char **argv) {
+	Camera	*camera;
+	int	retval;
+	int	capturecnt = 0;
+	GPContext *context = sample_create_context();
+
+	printf("Sample photobooth.\n");
+	printf("Continously stores previews in 'preview.jpg'.\n");
+	printf("kill -USR1 %d to take a capture.\n", getpid());
+	printf("kill -USR2 %d to read the 'config.txt'.\n", getpid());
+	printf("kill -TERM %d to finish.\n", getpid());
+
+        signal (SIGUSR1, sig_handler_capture_now);
+        signal (SIGUSR2, sig_handler_read_config);
+
+	gp_log_add_func(GP_LOG_ERROR, errordumper, 0);
+	gp_camera_new(&camera);
+
+	retval = gp_camera_init(camera, context);
+	if (retval != GP_OK) {
+		printf("  Retval: %d\n", retval);
+		exit (1);
+	}
+
+	while (1) {
+		CameraFile *file;
+		char output_file[32];
+
+		if (capture_now) {
+			capture_now = 0;
+			sprintf(output_file, "image-%03d.jpg", capturecnt++);
+			capture_to_file(camera, context, output_file);
+		}
+
+		retval = gp_file_new(&file);
+		if (retval != GP_OK) {
+			fprintf(stderr,"gp_file_new: %d\n", retval);
+			exit(1);
+		}
+
+		retval = gp_camera_capture_preview(camera, file, context);
+		if (retval != GP_OK) {
+			fprintf(stderr,"gp_camera_capture_preview failed: %d\n", retval);
+			exit(1);
+		}
+		retval = gp_file_save(file, "preview.jpg");
+		if (retval != GP_OK) {
+			fprintf(stderr,"saving preview failed: %d\n", retval);
+			exit(1);
+		}
+		gp_file_unref(file);
+	}
+	gp_camera_exit(camera, context);
+	return 0;
+}