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/* 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 by default 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 causes 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. Fix this issue by disabling spawning of a
* child helper process when scanning the build directory for
* plugins.
*/
gst_registry_fork_set_enabled(false);
/* Initialize GStreamer */
g_autoptr(GError) errInit = NULL;
if (!gst_init_check(nullptr, nullptr, &errInit)) {
g_printerr("Could not initialize GStreamer: %s\n",
errInit ? errInit->message : "unknown error");
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 = 2 * GST_SECOND;
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)
{
g_autoptr(GError) err = NULL;
g_autofree gchar *debug_info = NULL;
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");
}
GstElement *pipeline_;
GstElement *libcameraSrc_;
GstElement *convert0_;
GstElement *sink0_;
};
TEST_REGISTER(GstreamerSingleStreamTest)
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