added a minimalistic capture sample

git-svn-id: https://svn.code.sf.net/p/gphoto/code/trunk/libgphoto2@12733 67ed7778-7388-44ab-90cf-0a291f65f57c

2 files changed, 123 insertions, 1 deletions

diff --git a/examples/Makefile.am b/examples/Makefile.am
index e20fc2f83..4da77511a 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -21,12 +21,13 @@ INSTALL_TESTS_ENVIRONMENT = env \
 CLEANFILES = $(check_SCRIPTS)
 
 
-noinst_PROGRAMS += sample-autodetect sample-multi-detect lunkwill-canon-capture sample-owner sample-preview
+noinst_PROGRAMS += sample-autodetect sample-multi-detect lunkwill-canon-capture sample-owner sample-preview sample-capture
 
 sample_autodetect_SOURCES = sample-autodetect.c samples.h context.c config.c
 sample_owner_SOURCES = sample-owner.c samples.h context.c config.c
 sample_multi_detect_SOURCES = sample-multi-detect.c samples.h autodetect.c context.c config.c
 lunkwill_canon_capture_SOURCES = lunkwill-canon-capture.c context.c samples.h config.c
+sample_capture_SOURCES = sample-capture.c context.c samples.h config.c
 sample_preview_SOURCES = preview.c samples.h context.c config.c
 
 LDADD = $(top_builddir)/libgphoto2/libgphoto2.la \
diff --git a/examples/sample-capture.c b/examples/sample-capture.c
new file mode 100644
index 000000000..5ace242a8
--- /dev/null
+++ b/examples/sample-capture.c
@@ -0,0 +1,121 @@
+/* 
+ * This code released into the public domain 21 July 2008
+ * 
+ * This program does the equivalent of:
+ * gphoto2 --shell
+ *   > set-config capture=1
+ *   > capture-image-and-download
+ * compile with gcc -Wall -o canon-capture -lgphoto2 canon-capture.c
+ *
+ * Taken from: http://credentiality2.blogspot.com/2008/07/linux-libgphoto2-image-capture-from.html 
+ *
+ * and condensed into simple capture sample
+ */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include <gphoto2/gphoto2.h>
+
+#include "samples.h"
+
+static void errordumper(GPLogLevel level, const char *domain, const char *format,
+                 va_list args, void *data) {
+  vfprintf(stdout, format, args);
+  fprintf(stdout, "\n");
+}
+
+static void
+capture_to_memory(Camera *camera, GPContext *context, const char **ptr, unsigned long int *size) {
+	int retval;
+	CameraFile *file;
+	CameraFilePath camera_file_path;
+
+	printf("Capturing.\n");
+
+	/* NOP: This gets overridden in the library to /capt0000.jpg */
+	strcpy(camera_file_path.folder, "/");
+	strcpy(camera_file_path.name, "foo.jpg");
+
+	retval = gp_camera_capture(camera, GP_CAPTURE_IMAGE, &camera_file_path, context);
+	printf("  Retval: %d\n", retval);
+
+	printf("Pathname on the camera: %s/%s\n", camera_file_path.folder, camera_file_path.name);
+
+	retval = gp_file_new(&file);
+	printf("  Retval: %d\n", retval);
+	retval = gp_camera_file_get(camera, camera_file_path.folder, camera_file_path.name,
+		     GP_FILE_TYPE_NORMAL, file, context);
+	printf("  Retval: %d\n", retval);
+
+	gp_file_get_data_and_size (file, ptr, size);
+
+	printf("Deleting.\n");
+	retval = gp_camera_file_delete(camera, camera_file_path.folder, camera_file_path.name,
+			context);
+	printf("  Retval: %d\n", retval);
+
+	gp_file_free(file);
+}
+
+static void
+capture_to_file(Camera *camera, GPContext *context, char *fn) {
+	int fd, retval;
+	CameraFile *file;
+	CameraFilePath camera_file_path;
+
+	printf("Capturing.\n");
+
+	/* NOP: This gets overridden in the library to /capt0000.jpg */
+	strcpy(camera_file_path.folder, "/");
+	strcpy(camera_file_path.name, "foo.jpg");
+
+	retval = gp_camera_capture(camera, GP_CAPTURE_IMAGE, &camera_file_path, context);
+	printf("  Retval: %d\n", retval);
+
+	printf("Pathname on the camera: %s/%s\n", camera_file_path.folder, camera_file_path.name);
+
+	fd = open(fn, O_CREAT | O_WRONLY, 0644);
+	retval = gp_file_new_from_fd(&file, fd);
+	printf("  Retval: %d\n", retval);
+	retval = gp_camera_file_get(camera, camera_file_path.folder, camera_file_path.name,
+		     GP_FILE_TYPE_NORMAL, file, context);
+	printf("  Retval: %d\n", retval);
+
+	printf("Deleting.\n");
+	retval = gp_camera_file_delete(camera, camera_file_path.folder, camera_file_path.name,
+			context);
+	printf("  Retval: %d\n", retval);
+
+	gp_file_free(file);
+}
+
+int
+main(int argc, char **argv) {
+	Camera	*camera;
+	int	retval;
+	GPContext *context = sample_create_context();
+
+	gp_log_add_func(GP_LOG_ERROR, errordumper, NULL);
+	gp_camera_new(&camera);
+
+	/* When I set GP_LOG_DEBUG instead of GP_LOG_ERROR above, I noticed that the
+	 * init function seems to traverse the entire filesystem on the camera.  This
+	 * is partly why it takes so long.
+	 * (Marcus: the ptp2 driver does this by default currently.)
+	 */
+	printf("Camera init.  Takes about 10 seconds.\n");
+	retval = gp_camera_init(camera, context);
+	if (retval != GP_OK) {
+		printf("  Retval: %d\n", retval);
+		exit (1);
+	}
+	capture_to_file(camera, context, "foo.jpg");
+	gp_camera_exit(camera, context);
+	return 0;
+}