libcamera: pipeline: Introduce stopDevice()

Since a queue of waiting Requests has been introduced, not all Requests
queued to the PipelineHandler are immediately queued to the device.

As a Camera can be stopped at any time, it is required to complete the
waiting requests after the ones queued to the device had been completed.

Introduce a pure virtual PipelineHandler::stopDevice() function to be
implemented by pipeline handlers and make the PipelineHandler::stop()
function call it before completing pending requests.

Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/libcamera/pipeline/uvcvideo/uvcvideo.cpp b/src/libcamera/pipeline/uvcvideo/uvcvideo.cpp
index 264f5370..40654a0b 100644
--- a/src/libcamera/pipeline/uvcvideo/uvcvideo.cpp
+++ b/src/libcamera/pipeline/uvcvideo/uvcvideo.cpp
@@ -74,7 +74,7 @@ public:
 			       std::vector<std::unique_ptr<FrameBuffer>> *buffers) override;
 
 	int start(Camera *camera, const ControlList *controls) override;
-	void stop(Camera *camera) override;
+	void stopDevice(Camera *camera) override;
 
 	int queueRequestDevice(Camera *camera, Request *request) override;
 
@@ -250,7 +250,7 @@ int PipelineHandlerUVC::start(Camera *camera, [[maybe_unused]] const ControlList
 	return 0;
 }
 
-void PipelineHandlerUVC::stop(Camera *camera)
+void PipelineHandlerUVC::stopDevice(Camera *camera)
 {
 	UVCCameraData *data = cameraData(camera);
 	data->video_->streamOff();