[libcamera-devel] [PATCH v3 3/3] test: v4l2_videodevice: Verify the Dequeue Watchdog
Naushir Patuck
naush at raspberrypi.com
Tue Mar 29 13:29:29 CEST 2022
From: Kieran Bingham <kieran.bingham at ideasonboard.com>
Add a test that captures 5 frames, with a short (5ms) watchdog.
The default framerate of the VIMC pipeline should ensure that
we never meet this watchdog, and the timeout should activate.
Signed-off-by: Kieran Bingham <kieran.bingham at ideasonboard.com>
Signed-off-by: Naushir Patuck <naush at raspberrypi.com>
---
test/v4l2_videodevice/dequeue_watchdog.cpp | 96 ++++++++++++++++++++++
test/v4l2_videodevice/meson.build | 1 +
2 files changed, 97 insertions(+)
create mode 100644 test/v4l2_videodevice/dequeue_watchdog.cpp
diff --git a/test/v4l2_videodevice/dequeue_watchdog.cpp b/test/v4l2_videodevice/dequeue_watchdog.cpp
new file mode 100644
index 000000000000..0cb4de6f81a0
--- /dev/null
+++ b/test/v4l2_videodevice/dequeue_watchdog.cpp
@@ -0,0 +1,96 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2022, Ideas on Board Oy.
+ *
+ * libcamera V4L2 dequeue watchdog test
+ */
+
+#include <iostream>
+
+#include <libcamera/base/event_dispatcher.h>
+#include <libcamera/base/thread.h>
+#include <libcamera/base/timer.h>
+
+#include <libcamera/framebuffer.h>
+
+#include "v4l2_videodevice_test.h"
+
+using namespace libcamera;
+using namespace std::chrono_literals;
+
+class DequeueWatchdogTest : public V4L2VideoDeviceTest
+{
+public:
+ DequeueWatchdogTest()
+ : V4L2VideoDeviceTest("vimc", "Raw Capture 0"), frames_(0), barks_(0) {}
+
+protected:
+ int run()
+ {
+ constexpr unsigned int bufferCount = 8;
+
+ EventDispatcher *dispatcher = Thread::current()->eventDispatcher();
+ Timer timeout;
+
+ int ret = capture_->allocateBuffers(bufferCount, &buffers_);
+ if (ret < 0)
+ return TestFail;
+
+ capture_->dequeueTimeout.connect(this, &DequeueWatchdogTest::barkCounter);
+ capture_->setDequeueTimeout(5ms);
+
+ capture_->bufferReady.connect(this, &DequeueWatchdogTest::receiveBuffer);
+
+ for (const std::unique_ptr<FrameBuffer> &buffer : buffers_) {
+ if (capture_->queueBuffer(buffer.get())) {
+ std::cout << "Failed to queue buffer" << std::endl;
+ return TestFail;
+ }
+ }
+
+ capture_->streamOn();
+
+ timeout.start(5s);
+ while (timeout.isRunning()) {
+ dispatcher->processEvents();
+ if (frames_ > 5)
+ break;
+ }
+
+ std::cout << "Processed " << frames_ << " frames_ and heard "
+ << barks_ << " barks_" << std::endl;
+
+ if (!barks_) {
+ std::cout << "Failed to hear any barks_." << std::endl;
+ return TestFail;
+ }
+
+ capture_->streamOff();
+
+ return TestPass;
+ }
+
+private:
+ void receiveBuffer(FrameBuffer *buffer)
+ {
+ if (buffer->metadata().status == FrameMetadata::FrameCancelled)
+ return;
+
+ std::cout << "Buffer received" << std::endl;
+ frames_++;
+
+ /* Requeue the buffer for further use. */
+ capture_->queueBuffer(buffer);
+ }
+
+ void barkCounter()
+ {
+ std::cout << "Watchdog is barking" << std::endl;
+ barks_++;
+ }
+
+ unsigned int frames_;
+ unsigned int barks_;
+};
+
+TEST_REGISTER(DequeueWatchdogTest)
diff --git a/test/v4l2_videodevice/meson.build b/test/v4l2_videodevice/meson.build
index 643f82edce5e..7a26f53d106a 100644
--- a/test/v4l2_videodevice/meson.build
+++ b/test/v4l2_videodevice/meson.build
@@ -6,6 +6,7 @@ v4l2_videodevice_tests = [
['double_open', 'double_open.cpp'],
['controls', 'controls.cpp'],
['formats', 'formats.cpp'],
+ ['dequeue_watchdog', 'dequeue_watchdog.cpp'],
['request_buffers', 'request_buffers.cpp'],
['buffer_cache', 'buffer_cache.cpp'],
['stream_on_off', 'stream_on_off.cpp'],
--
2.25.1
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