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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2021, Vedant Paranjape
*
* libcamera Gstreamer element API tests
*/
#include <libcamera/libcamera.h>
#include <libcamera/base/utils.h>
#include "gstreamer_test.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";
}
}
GstreamerTest::GstreamerTest(unsigned int numStreams)
: pipeline_(nullptr), libcameraSrc_(nullptr)
{
/*
* 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");
status_ = TestFail;
return;
}
/*
* Remove the system libcamera plugin, if any, and add the
* plugin from the build directory.
*/
GstRegistry *registry = gst_registry_get();
g_autoptr(GstPlugin) plugin = gst_registry_lookup(registry, "libgstlibcamera.so");
if (plugin)
gst_registry_remove_plugin(registry, 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");
status_ = TestFail;
return;
}
/*
* Atleast one camera should be available with numStreams streams,
* otherwise skip the test entirely.
*/
if (!checkMinCameraStreamsAndSetCameraName(numStreams)) {
status_ = TestSkip;
return;
}
status_ = TestPass;
}
bool GstreamerTest::checkMinCameraStreamsAndSetCameraName(unsigned int numStreams)
{
libcamera::CameraManager cm;
bool cameraFound = false;
cm.start();
for (auto &camera : cm.cameras()) {
if (camera->streams().size() < numStreams)
continue;
cameraFound = true;
cameraName_ = camera->id();
break;
}
cm.stop();
return cameraFound;
}
GstreamerTest::~GstreamerTest()
{
g_clear_object(&pipeline_);
g_clear_object(&libcameraSrc_);
gst_deinit();
}
int GstreamerTest::createPipeline()
{
libcameraSrc_ = gst_element_factory_make("libcamerasrc", "libcamera");
pipeline_ = gst_pipeline_new("test-pipeline");
if (!libcameraSrc_ || !pipeline_) {
g_printerr("Unable to create pipeline %p.%p\n",
libcameraSrc_, pipeline_);
return TestFail;
}
g_object_set(libcameraSrc_, "camera-name", cameraName_.c_str(), NULL);
g_object_ref_sink(libcameraSrc_);
return TestPass;
}
int GstreamerTest::startPipeline()
{
GstStateChangeReturn ret;
/* 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;
}
return TestPass;
}
int GstreamerTest::processEvent()
{
/* 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:
printError(msg);
break;
case GST_MESSAGE_EOS:
g_print("End-Of-Stream reached.\n");
break;
default:
g_printerr("Unexpected message received.\n");
break;
}
return TestFail;
}
void GstreamerTest::printError(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");
}
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