2 files changed, 207 insertions, 0 deletions
diff --git a/test/gstreamer/gstreamer_single_stream_test.cpp b/test/gstreamer/gstreamer_single_stream_test.cpp
new file mode 100644
index 00000000..a805fb8a
--- /dev/null
+++ b/test/gstreamer/gstreamer_single_stream_test.cpp
@@ -0,0 +1,188 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2021, Vedant Paranjape
+ *
+ * gstreamer_single_stream_test.cpp - GStreamer single stream capture test
+ */
+
+#include <iostream>
+#include <unistd.h>
+
+#include <libcamera/base/utils.h>
+
+#include "libcamera/internal/source_paths.h"
+
+#include <gst/gst.h>
+
+#include "test.h"
+
+using namespace std;
+
+extern "C" {
+const char *__asan_default_options()
+{
+	/*
+	 * Disable leak detection due to a known global variable initialization
+	 * leak in glib's g_quark_init(). This should ideally be handled by
+	 * using a suppression file instead of disabling leak detection.
+	 */
+	return "detect_leaks=false";
+}
+}
+
+class GstreamerSingleStreamTest : public Test
+{
+protected:
+	int init() override
+	{
+		/*
+		 * GStreamer spawns a process to run the gst-plugin-scanner
+		 * helper. If libcamera is compiled with ASan enabled, and as
+		 * GStreamer is most likely not, this will cause the ASan link
+		 * order check to fail when gst-plugin-scanner dlopen()s the
+		 * plugin as many libraries will have already been loaded by
+		 * then. Work around this issue by disabling the link order
+		 * check. This will only affect child processes, as ASan is
+		 * already loaded for this process by the time this code is
+		 * executed, and should thus hopefully be safe.
+		 *
+		 * This option is not available in gcc older than 8, the only
+		 * option in that case is to skip the test.
+		 */
+#if defined(__SANITIZE_ADDRESS__) && !defined(__clang__) && __GNUC__ < 8
+		return TestSkip;
+#endif
+		setenv("ASAN_OPTIONS", "verify_asan_link_order=0", 1);
+
+		/* Initialize GStreamer */
+		GError *errInit = nullptr;
+		if (!gst_init_check(nullptr, nullptr, &errInit)) {
+			g_printerr("Could not initialize GStreamer: %s\n",
+				   errInit ? errInit->message : "unknown error");
+			if (errInit)
+				g_error_free(errInit);
+
+			return TestFail;
+		}
+
+		/*
+		 * Remove the system libcamera plugin, if any, and add the
+		 * plugin from the build directory.
+		 */
+		GstRegistry *registry = gst_registry_get();
+		GstPlugin *plugin = gst_registry_lookup(registry, "libgstlibcamera.so");
+		if (plugin) {
+			gst_registry_remove_plugin(registry, plugin);
+			gst_object_unref(plugin);
+		}
+
+		std::string path = libcamera::utils::libcameraBuildPath()
+				 + "src/gstreamer";
+		if (!gst_registry_scan_path(registry, path.c_str())) {
+			g_printerr("Failed to add plugin to registry\n");
+			gst_deinit();
+			return TestFail;
+		}
+
+		/* Create the elements */
+		libcameraSrc_ = gst_element_factory_make("libcamerasrc", "libcamera");
+		convert0_ = gst_element_factory_make("videoconvert", "convert0");
+		sink0_ = gst_element_factory_make("fakesink", "sink0");
+
+		/* Create the empty pipeline_ */
+		pipeline_ = gst_pipeline_new("test-pipeline");
+
+		if (!pipeline_ || !convert0_ || !sink0_ || !libcameraSrc_) {
+			g_printerr("Not all elements could be created. %p.%p.%p.%p\n",
+				   pipeline_, convert0_, sink0_, libcameraSrc_);
+			if (pipeline_)
+				gst_object_unref(pipeline_);
+			if (convert0_)
+				gst_object_unref(convert0_);
+			if (sink0_)
+				gst_object_unref(sink0_);
+			if (libcameraSrc_)
+				gst_object_unref(libcameraSrc_);
+			gst_deinit();
+
+			return TestFail;
+		}
+
+		return TestPass;
+	}
+
+	void cleanup() override
+	{
+		gst_object_unref(pipeline_);
+		gst_deinit();
+	}
+
+	int run() override
+	{
+		GstStateChangeReturn ret;
+
+		/* Build the pipeline */
+		gst_bin_add_many(GST_BIN(pipeline_), libcameraSrc_, convert0_, sink0_, NULL);
+		if (gst_element_link_many(libcameraSrc_, convert0_, sink0_, NULL) != TRUE) {
+			g_printerr("Elements could not be linked.\n");
+			return TestFail;
+		}
+
+		/* Start playing */
+		ret = gst_element_set_state(pipeline_, GST_STATE_PLAYING);
+		if (ret == GST_STATE_CHANGE_FAILURE) {
+			g_printerr("Unable to set the pipeline to the playing state.\n");
+			return TestFail;
+		}
+
+		/* Wait until error or EOS or timeout after 2 seconds */
+		constexpr GstMessageType msgType =
+			static_cast<GstMessageType>(GST_MESSAGE_ERROR | GST_MESSAGE_EOS);
+		constexpr GstClockTime timeout = 2000000000;
+
+		g_autoptr(GstBus) bus = gst_element_get_bus(pipeline_);
+		g_autoptr(GstMessage) msg = gst_bus_timed_pop_filtered(bus, timeout, msgType);
+
+		gst_element_set_state(pipeline_, GST_STATE_NULL);
+
+		/* Parse error message */
+		if (msg == NULL)
+			return TestPass;
+
+		switch (GST_MESSAGE_TYPE(msg)) {
+		case GST_MESSAGE_ERROR:
+			gstreamer_print_error(msg);
+			break;
+		case GST_MESSAGE_EOS:
+			g_print("End-Of-Stream reached.\n");
+			break;
+		default:
+			g_printerr("Unexpected message received.\n");
+			break;
+		}
+
+		return TestFail;
+	}
+
+private:
+	void gstreamer_print_error(GstMessage *msg)
+	{
+		GError *err;
+		gchar *debug_info;
+
+		gst_message_parse_error(msg, &err, &debug_info);
+		g_printerr("Error received from element %s: %s\n",
+			   GST_OBJECT_NAME(msg->src), err->message);
+		g_printerr("Debugging information: %s\n",
+			   debug_info ? debug_info : "none");
+		g_clear_error(&err);
+		g_free(debug_info);
+	}
+
+	GstElement *pipeline_;
+	GstElement *libcameraSrc_;
+	GstElement *convert0_;
+	GstElement *sink0_;
+};
+
+TEST_REGISTER(GstreamerSingleStreamTest)
diff --git a/test/gstreamer/meson.build b/test/gstreamer/meson.build
new file mode 100644
index 00000000..b99aa0da
--- /dev/null
+++ b/test/gstreamer/meson.build
@@ -0,0 +1,19 @@
+# SPDX-License-Identifier: CC0-1.0
+
+if not gst_enabled
+    subdir_done()
+endif
+
+gstreamer_tests = [
+    ['single_stream_test',   'gstreamer_single_stream_test.cpp'],
+]
+gstreamer_dep = dependency('gstreamer-1.0', required: true)
+
+foreach t : gstreamer_tests
+    exe = executable(t[0], t[1],
+                     dependencies : [libcamera_private, gstreamer_dep],
+                     link_with : test_libraries,
+                     include_directories : test_includes_internal)
+
+    test(t[0], exe, suite : 'gstreamer', is_parallel : false)
+endforeach