test: camera: Add capture test

Correctly configure the camera using the default configuration and run a
capture session for 100 milliseconds, which is plenty of time, in tests
over 600 requests completed using the vimc pipeline.

The test passes if at least the number of buffers used in the capture
times two number of requests completes to prove we cycle through all
buffers.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

test/camera/capture.cpp

@@ -0,0 +1,142 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * libcamera Camera API tests
+ */
+
+#include <iostream>
+
+#include "camera_test.h"
+
+using namespace std;
+
+namespace {
+
+class Capture : public CameraTest
+{
+protected:
+	unsigned int completeBuffersCount_;
+	unsigned int completeRequestsCount_;
+
+	void bufferComplete(Request *request, Buffer *buffer)
+	{
+		if (buffer->status() != Buffer::BufferSuccess)
+			return;
+
+		completeBuffersCount_++;
+	}
+
+	void requestComplete(Request *request, const std::map<Stream *, Buffer *> &buffers)
+	{
+		if (request->status() != Request::RequestComplete)
+			return;
+
+		completeRequestsCount_++;
+
+		/* Reuse the buffers for a new request. */
+		request = camera_->createRequest();
+		request->setBuffers(buffers);
+		camera_->queueRequest(request);
+	}
+
+	int run()
+	{
+		Stream *stream = *camera_->streams().begin();
+		std::set<Stream *> streams = { stream };
+		std::map<Stream *, StreamConfiguration> conf =
+			camera_->streamConfiguration(streams);
+		StreamConfiguration *sconf = &conf.begin()->second;
+
+		if (!configurationValid(streams, conf)) {
+			cout << "Failed to read default configuration" << endl;
+			return TestFail;
+		}
+
+		if (camera_->acquire()) {
+			cout << "Failed to acquire the camera" << endl;
+			return TestFail;
+		}
+
+		if (camera_->configureStreams(conf)) {
+			cout << "Failed to set default configuration" << endl;
+			return TestFail;
+		}
+
+		if (camera_->allocateBuffers()) {
+			cout << "Failed to allocate buffers" << endl;
+			return TestFail;
+		}
+
+		BufferPool &pool = stream->bufferPool();
+		std::vector<Request *> requests;
+		for (Buffer &buffer : pool.buffers()) {
+			Request *request = camera_->createRequest();
+			if (!request) {
+				cout << "Failed to create request" << endl;
+				return TestFail;
+			}
+
+			std::map<Stream *, Buffer *> map = { { stream, &buffer } };
+			if (request->setBuffers(map)) {
+				cout << "Failed to associating buffer with request" << endl;
+				return TestFail;
+			}
+
+			requests.push_back(request);
+		}
+
+		completeRequestsCount_ = 0;
+		completeBuffersCount_ = 0;
+
+		camera_->bufferCompleted.connect(this, &Capture::bufferComplete);
+		camera_->requestCompleted.connect(this, &Capture::requestComplete);
+
+		if (camera_->start()) {
+			cout << "Failed to start camera" << endl;
+			return TestFail;
+		}
+
+		for (Request *request : requests) {
+			if (camera_->queueRequest(request)) {
+				cout << "Failed to queue request" << endl;
+				return TestFail;
+			}
+		}
+
+		EventDispatcher *dispatcher = CameraManager::instance()->eventDispatcher();
+
+		Timer timer;
+		timer.start(100);
+		while (timer.isRunning())
+			dispatcher->processEvents();
+
+		if (completeRequestsCount_ <= sconf->bufferCount * 2) {
+			cout << "Failed to capture enough frames (got "
+			     << completeRequestsCount_ << " expected at least "
+			     << sconf->bufferCount * 2 << ")" << endl;
+			return TestFail;
+		}
+
+		if (completeRequestsCount_ != completeBuffersCount_) {
+			cout << "Number of completed buffers and requests differ" << endl;
+			return TestFail;
+		}
+
+		if (camera_->stop()) {
+			cout << "Failed to stop camera" << endl;
+			return TestFail;
+		}
+
+		if (camera_->freeBuffers()) {
+			cout << "Failed to free buffers" << endl;
+			return TestFail;
+		}
+
+		return TestPass;
+	}
+};
+
+} /* namespace */
+
+TEST_REGISTER(Capture);