From 6de83f98c5f4d5fb696f413aa9dbe49ab4515661 Mon Sep 17 00:00:00 2001
From: Matthias Vogelgesang <matthias.vogelgesang@ipe.fzk.de>
Date: Thu, 17 Mar 2011 15:38:38 +0100
Subject: Expose grab-by-callback via camera and add asynchronous grabbing
 example

---
 test/CMakeLists.txt |  2 ++
 test/grab-async.c   | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 48 insertions(+)
 create mode 100644 test/grab-async.c

(limited to 'test')

diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 3ea7414..287f9ea 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -15,9 +15,11 @@ file(COPY ${CMAKE_CURRENT_SOURCE_DIR}/control.glade
 # --- Build targets -----------------------------------------------------------
 add_executable(enum enum.c)
 add_executable(grab grab.c)
+add_executable(grab-async grab-async.c)
 
 target_link_libraries(enum uca)
 target_link_libraries(grab uca)
+target_link_libraries(grab-async uca)
 
 if (GTK2_FOUND)
     include_directories(${GTK2_INCLUDE_DIRS})
diff --git a/test/grab-async.c b/test/grab-async.c
new file mode 100644
index 0000000..8086d92
--- /dev/null
+++ b/test/grab-async.c
@@ -0,0 +1,46 @@
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include "uca.h"
+#include "uca-cam.h"
+
+void grab_callback(uint32_t image_number, void *buffer)
+{
+    printf("got picture number %i\n", image_number);
+}
+
+int main(int argc, char *argv[])
+{
+    struct uca *u = uca_init(NULL);
+    if (u == NULL) {
+        printf("Couldn't find a camera\n");
+        return 1;
+    }
+
+    /* take first camera */
+    struct uca_camera *cam = u->cameras;
+
+    uint32_t val = 1;
+    cam->set_property(cam, UCA_PROP_EXPOSURE, &val);
+    val = 0;
+    cam->set_property(cam, UCA_PROP_DELAY, &val);
+    val = 10;
+    cam->set_property(cam, UCA_PROP_FRAMERATE, &val);
+
+    uint32_t width, height, bits;
+    cam->get_property(cam, UCA_PROP_WIDTH, &width, 0);
+    cam->get_property(cam, UCA_PROP_HEIGHT, &height, 0);
+    cam->get_property(cam, UCA_PROP_BITDEPTH, &bits, 0);
+
+    uca_cam_alloc(cam, 10);
+
+    cam->register_callback(cam, &grab_callback);
+    cam->start_recording(cam);
+    printf("waiting for 10 seconds\n");
+    sleep(10);
+    cam->stop_recording(cam);
+
+    uca_destroy(u);
+    return 0;
+}
-- 
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