[libcamera-devel] [PATCH 2/2] libcamera: pipeline: uvcvideo: add pipeline handler for uvcvideo

[Niklas Söderlund]

Provide a pipeline handler for uvcvideo devices. The entity names for
uvc devices are different for different cameras so matching on entity
names is not possible in the generic case. This leaves options to create
specialized uvc pipeline handlers if needed to fit a specific models
needs.

Signed-off-by: Niklas Söderlund <niklas.soderlund at ragnatech.se>
---
 src/libcamera/pipeline/meson.build  |  1 +
 src/libcamera/pipeline/uvcvideo.cpp | 59 +++++++++++++++++++++++++++++
 2 files changed, 60 insertions(+)
 create mode 100644 src/libcamera/pipeline/uvcvideo.cpp

diff --git a/src/libcamera/pipeline/meson.build b/src/libcamera/pipeline/meson.build
index 615ecd20f1a21141..4da5d8cf9c4384bb 100644
--- a/src/libcamera/pipeline/meson.build
+++ b/src/libcamera/pipeline/meson.build
@@ -1,3 +1,4 @@
 libcamera_sources += files([
+    'uvcvideo.cpp',
     'vimc.cpp',
 ])
diff --git a/src/libcamera/pipeline/uvcvideo.cpp b/src/libcamera/pipeline/uvcvideo.cpp
new file mode 100644
index 0000000000000000..2579782e90caec5a
--- /dev/null
+++ b/src/libcamera/pipeline/uvcvideo.cpp
@@ -0,0 +1,59 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * uvcvideo.cpp - Pipeline handler for uvcvideo devices
+ */
+
+#include <libcamera/camera.h>
+#include <libcamera/camera_manager.h>
+
+#include "device_enumerator.h"
+#include "media_device.h"
+#include "pipeline_handler.h"
+
+namespace libcamera {
+
+class PipeHandlerUvcvideo : public PipelineHandler
+{
+public:
+	PipeHandlerUvcvideo();
+	~PipeHandlerUvcvideo();
+
+	bool match(CameraManager *manager, DeviceEnumerator *enumerator);
+
+private:
+	MediaDevice *dev_;
+};
+
+PipeHandlerUvcvideo::PipeHandlerUvcvideo()
+	: dev_(nullptr)
+{
+}
+
+PipeHandlerUvcvideo::~PipeHandlerUvcvideo()
+{
+	if (dev_)
+		dev_->release();
+}
+
+bool PipeHandlerUvcvideo::match(CameraManager *manager, DeviceEnumerator *enumerator)
+{
+	DeviceMatch dm("uvcvideo");
+
+	dev_ = enumerator->search(dm);
+
+	if (!dev_)
+		return false;
+
+	dev_->acquire();
+
+	std::shared_ptr<Camera> camera = Camera::create(dev_->model());
+	manager->addCamera(std::move(camera));
+
+	return true;
+}
+
+REGISTER_PIPELINE_HANDLER(PipeHandlerUvcvideo);
+
+} /* namespace libcamera */
-- 
2.20.1