libcamera, android, cam, gstreamer, qcam, v4l2: Reuse Request

Allow reuse of the Request object by implementing reuse(). This means
the applications now have the responsibility of freeing the Request
objects, so make all libcamera users (cam, qcam, v4l2-compat, gstreamer,
android) do so.

Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>

3 files changed, 17 insertions, 18 deletions

diff --git a/test/camera/buffer_import.cpp b/test/camera/buffer_import.cpp
index 64e96264..72ce7b79 100644
--- a/test/camera/buffer_import.cpp
+++ b/test/camera/buffer_import.cpp
@@ -58,7 +58,7 @@ protected:
 		const Stream *stream = buffers.begin()->first;
 		FrameBuffer *buffer = buffers.begin()->second;
 
-		request = camera_->createRequest();
+		request->reuse();
 		request->addBuffer(stream, buffer);
 		camera_->queueRequest(request);
 	}
@@ -98,9 +98,8 @@ protected:
 		if (ret != TestPass)
 			return ret;
 
-		std::vector<Request *> requests;
 		for (const std::unique_ptr<FrameBuffer> &buffer : source.buffers()) {
-			Request *request = camera_->createRequest();
+			std::unique_ptr<Request> request = camera_->createRequest();
 			if (!request) {
 				std::cout << "Failed to create request" << std::endl;
 				return TestFail;
@@ -111,7 +110,7 @@ protected:
 				return TestFail;
 			}
 
-			requests.push_back(request);
+			requests_.push_back(std::move(request));
 		}
 
 		completeRequestsCount_ = 0;
@@ -125,8 +124,8 @@ protected:
 			return TestFail;
 		}
 
-		for (Request *request : requests) {
-			if (camera_->queueRequest(request)) {
+		for (std::unique_ptr<Request> &request : requests_) {
+			if (camera_->queueRequest(request.get())) {
 				std::cout << "Failed to queue request" << std::endl;
 				return TestFail;
 			}
@@ -160,6 +159,8 @@ protected:
 	}
 
 private:
+	std::vector<std::unique_ptr<Request>> requests_;
+
 	unsigned int completeBuffersCount_;
 	unsigned int completeRequestsCount_;
 	std::unique_ptr<CameraConfiguration> config_;
diff --git a/test/camera/capture.cpp b/test/camera/capture.cpp
index 51bbd258..c0770801 100644
--- a/test/camera/capture.cpp
+++ b/test/camera/capture.cpp
@@ -52,7 +52,7 @@ protected:
 		const Stream *stream = buffers.begin()->first;
 		FrameBuffer *buffer = buffers.begin()->second;
 
-		request = camera_->createRequest();
+		request->reuse();
 		request->addBuffer(stream, buffer);
 		camera_->queueRequest(request);
 	}
@@ -98,9 +98,8 @@ protected:
 		if (ret < 0)
 			return TestFail;
 
-		std::vector<Request *> requests;
 		for (const std::unique_ptr<FrameBuffer> &buffer : allocator_->buffers(stream)) {
-			Request *request = camera_->createRequest();
+			std::unique_ptr<Request> request = camera_->createRequest();
 			if (!request) {
 				cout << "Failed to create request" << endl;
 				return TestFail;
@@ -111,7 +110,7 @@ protected:
 				return TestFail;
 			}
 
-			requests.push_back(request);
+			requests_.push_back(std::move(request));
 		}
 
 		completeRequestsCount_ = 0;
@@ -125,8 +124,8 @@ protected:
 			return TestFail;
 		}
 
-		for (Request *request : requests) {
-			if (camera_->queueRequest(request)) {
+		for (std::unique_ptr<Request> &request : requests_) {
+			if (camera_->queueRequest(request.get())) {
 				cout << "Failed to queue request" << endl;
 				return TestFail;
 			}
@@ -161,6 +160,8 @@ protected:
 		return TestPass;
 	}
 
+	std::vector<std::unique_ptr<Request>> requests_;
+
 	std::unique_ptr<CameraConfiguration> config_;
 	FrameBufferAllocator *allocator_;
 };
diff --git a/test/camera/statemachine.cpp b/test/camera/statemachine.cpp
index 28faeb91..e63ab298 100644
--- a/test/camera/statemachine.cpp
+++ b/test/camera/statemachine.cpp
@@ -101,13 +101,10 @@ protected:
 			return TestFail;
 
 		/* Test operations which should pass. */
-		Request *request2 = camera_->createRequest();
+		std::unique_ptr<Request> request2 = camera_->createRequest();
 		if (!request2)
 			return TestFail;
 
-		/* Never handed to hardware so need to manually delete it. */
-		delete request2;
-
 		/* Test valid state transitions, end in Running state. */
 		if (camera_->release())
 			return TestFail;
@@ -146,7 +143,7 @@ protected:
 			return TestFail;
 
 		/* Test operations which should pass. */
-		Request *request = camera_->createRequest();
+		std::unique_ptr<Request> request = camera_->createRequest();
 		if (!request)
 			return TestFail;
 
@@ -154,7 +151,7 @@ protected:
 		if (request->addBuffer(stream, allocator_->buffers(stream)[0].get()))
 			return TestFail;
 
-		if (camera_->queueRequest(request))
+		if (camera_->queueRequest(request.get()))
 			return TestFail;
 
 		/* Test valid state transitions, end in Available state. */