[PATCH v4 1/3] libcamera: pipeline_handler: Provide cancelRequest

[Milan Zamazal]

Let's extract the two occurrences of canceling a request to a common
helper.  This is especially useful for the followup patch, which needs
to cancel a request from outside.

Signed-off-by: Milan Zamazal <mzamazal at redhat.com>
---
 include/libcamera/internal/pipeline_handler.h |  1 +
 src/libcamera/pipeline_handler.cpp            | 23 +++++++++++++------
 2 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/include/libcamera/internal/pipeline_handler.h b/include/libcamera/internal/pipeline_handler.h
index 0d3808036..fb28a18d0 100644
--- a/include/libcamera/internal/pipeline_handler.h
+++ b/include/libcamera/internal/pipeline_handler.h
@@ -60,6 +60,7 @@ public:
 
 	bool completeBuffer(Request *request, FrameBuffer *buffer);
 	void completeRequest(Request *request);
+	void cancelRequest(Request *request);
 
 	std::string configurationFile(const std::string &subdir,
 				      const std::string &name) const;
diff --git a/src/libcamera/pipeline_handler.cpp b/src/libcamera/pipeline_handler.cpp
index e59404691..c9cb11f0f 100644
--- a/src/libcamera/pipeline_handler.cpp
+++ b/src/libcamera/pipeline_handler.cpp
@@ -367,9 +367,7 @@ void PipelineHandler::stop(Camera *camera)
 	while (!waitingRequests_.empty()) {
 		Request *request = waitingRequests_.front();
 		waitingRequests_.pop();
-
-		request->_d()->cancel();
-		completeRequest(request);
+		cancelRequest(request);
 	}
 
 	/* Make sure no requests are pending. */
@@ -470,10 +468,8 @@ void PipelineHandler::doQueueRequest(Request *request)
 	}
 
 	int ret = queueRequestDevice(camera, request);
-	if (ret) {
-		request->_d()->cancel();
-		completeRequest(request);
-	}
+	if (ret)
+		cancelRequest(request);
 }
 
 /**
@@ -568,6 +564,19 @@ void PipelineHandler::completeRequest(Request *request)
 	}
 }
 
+/**
+ * \brief Cancel request and signal its completion
+ * \param[in] request The request to cancel
+ *
+ * This function cancels the request in addition to its completion. The same
+ * rules as for completeRequest() apply.
+ */
+void PipelineHandler::cancelRequest(Request *request)
+{
+	request->_d()->cancel();
+	completeRequest(request);
+}
+
 /**
  * \brief Retrieve the absolute path to a platform configuration file
  * \param[in] subdir The pipeline handler specific subdirectory name
-- 
2.44.1