[libcamera-devel] [PATCH v4] test: gstreamer: Add a test for gstreamer multi stream

[paul.elder at ideasonboard.com]

Hi Vedant,

On Fri, Sep 24, 2021 at 02:08:21PM +0530, Vedant Paranjape wrote:
> This patch adds a test to test if multi stream using libcamera's
> gstreamer element works.
> 
> Test will run only on devices that support multistream capture, eg.,
> devices that use IPU3 and raspberrypi pipeline. This was tested on
> a Raspberry Pi 4B+.
> 
> Signed-off-by: Vedant Paranjape <vedantparanjape160201 at gmail.com>
> Reviewed-by: Nicolas Dufresne <nicolas.dufresne at collabora.com>
> ---
>  .../gstreamer/gstreamer_multi_stream_test.cpp | 124 ++++++++++++++++++
>  test/gstreamer/meson.build                    |   1 +
>  2 files changed, 125 insertions(+)
>  create mode 100644 test/gstreamer/gstreamer_multi_stream_test.cpp
> 
> diff --git a/test/gstreamer/gstreamer_multi_stream_test.cpp b/test/gstreamer/gstreamer_multi_stream_test.cpp
> new file mode 100644
> index 000000000000..6a9a6f2509cb
> --- /dev/null
> +++ b/test/gstreamer/gstreamer_multi_stream_test.cpp
> @@ -0,0 +1,124 @@
> +/* SPDX-License-Identifier: GPL-2.0-or-later */
> +/*
> + * Copyright (C) 2021, Vedant Paranjape
> + *
> + * gstreamer_multi_stream_test.cpp - GStreamer multi stream capture test
> + */
> +
> +#include <iostream>
> +#include <unistd.h>
> +
> +#include <libcamera/libcamera.h>
> +
> +#include <gst/gst.h>
> +
> +#include "gstreamer_test.h"
> +#include "test.h"

Could you please later send a patch to remove the unnecessary includes
from the single stream test?

> +
> +using namespace std;
> +
> +class GstreamerMultiStreamTest : public GstreamerTest, public Test
> +{
> +public:
> +	GstreamerMultiStreamTest()
> +		: GstreamerTest()
> +	{
> +	}
> +
> +protected:
> +	int init() override
> +	{
> +		if (status_ != TestPass)
> +			return status_;
> +
> +		/* Check if platform support multistream output */

s/support/supports/

s/output/capture/

I'll do these changes when applying.


Looks good!

Reviewed-by: Paul Elder <paul.elder at ideasonboard.com>

> +		libcamera::CameraManager cm;
> +		cm.start();
> +		bool cameraFound = false;
> +		for (auto &camera : cm.cameras()) {
> +			if (camera->streams().size() > 1) {
> +				cameraName_ = camera->id();
> +				cameraFound = true;
> +				cm.stop();
> +				break;
> +			}
> +		}
> +
> +		if (!cameraFound) {
> +			cm.stop();
> +			return TestSkip;
> +		}
> +
> +		const gchar *streamDescription = "queue ! fakesink";
> +		g_autoptr(GError) error = NULL;
> +
> +		stream0_ = gst_parse_bin_from_description_full(streamDescription, TRUE,
> +							       NULL,
> +							       GST_PARSE_FLAG_FATAL_ERRORS,
> +							       &error);
> +		if (!stream0_) {
> +			g_printerr("Stream0 could not be created (%s)\n", error->message);
> +			return TestFail;
> +		}
> +		g_object_ref_sink(stream0_);
> +
> +		stream1_ = gst_parse_bin_from_description_full(streamDescription, TRUE,
> +							       NULL,
> +							       GST_PARSE_FLAG_FATAL_ERRORS,
> +							       &error);
> +		if (!stream1_) {
> +			g_printerr("Stream1 could not be created (%s)\n", error->message);
> +			return TestFail;
> +		}
> +		g_object_ref_sink(stream1_);
> +
> +		if (createPipeline() != TestPass)
> +			return TestFail;
> +
> +		return TestPass;
> +	}
> +
> +	int run() override
> +	{
> +		g_object_set(libcameraSrc_, "camera-name", cameraName_.c_str(), NULL);
> +
> +		/* Build the pipeline */
> +		gst_bin_add_many(GST_BIN(pipeline_), libcameraSrc_,
> +				 stream0_, stream1_, NULL);
> +
> +		g_autoptr(GstPad) src_pad = gst_element_get_static_pad(libcameraSrc_, "src");
> +		g_autoptr(GstPad) request_pad = gst_element_get_request_pad(libcameraSrc_, "src_%u");
> +
> +		{
> +			g_autoptr(GstPad) queue0_sink_pad = gst_element_get_static_pad(stream0_, "sink");
> +			g_autoptr(GstPad) queue1_sink_pad = gst_element_get_static_pad(stream1_, "sink");
> +
> +			if (gst_pad_link(src_pad, queue0_sink_pad) != GST_PAD_LINK_OK ||
> +			    gst_pad_link(request_pad, queue1_sink_pad) != GST_PAD_LINK_OK) {
> +				g_printerr("Pads could not be linked.\n");
> +				return TestFail;
> +			}
> +		}
> +
> +		if (startPipeline() != TestPass)
> +			return TestFail;
> +
> +		if (processEvent() != TestPass)
> +			return TestFail;
> +
> +		return TestPass;
> +	}
> +
> +	void cleanup() override
> +	{
> +		g_clear_object(&stream0_);
> +		g_clear_object(&stream1_);
> +	}
> +
> +private:
> +	std::string cameraName_;
> +	GstElement *stream0_;
> +	GstElement *stream1_;
> +};
> +
> +TEST_REGISTER(GstreamerMultiStreamTest)
> diff --git a/test/gstreamer/meson.build b/test/gstreamer/meson.build
> index aca53b920365..10058fc5206f 100644
> --- a/test/gstreamer/meson.build
> +++ b/test/gstreamer/meson.build
> @@ -6,6 +6,7 @@ endif
>  
>  gstreamer_tests = [
>      ['single_stream_test',   'gstreamer_single_stream_test.cpp'],
> +    ['multi_stream_test',    'gstreamer_multi_stream_test.cpp'],
>  ]
>  gstreamer_dep = dependency('gstreamer-1.0', required: true)
>  
> -- 
> 2.25.1
>