[libcamera-devel] [PATCH 1/9] libcamera: pipeline: Introduce skeleton Vivid Pipeline

[Kieran Bingham]

Provide all of the skeleton stubs to succesfully compile
and register a new Pipeline Handler for the Vivid test device.

Meson must be reconfigured to ensure that this pipeline handler is
included in the selected pipelines configuration, and after building, we
can test that the PipelineHandler is successfully registered by listing
the cameras on the system with LIBCAMERA_LOG_LEVELS enabled:

"""
LIBCAMERA_LOG_LEVELS=Pipeline:0 ./build-vivid/src/cam/cam -l
[230:30:03.624102821] [2867886] DEBUG Pipeline pipeline_handler.cpp:680 Registered pipeline handler "PipelineHandlerVivid"
Available cameras:
"""

Signed-off-by: Kieran Bingham <kieran.bingham at ideasonboard.com>
---
 meson_options.txt                        |  2 +-
 src/libcamera/pipeline/vivid/meson.build |  5 ++
 src/libcamera/pipeline/vivid/vivid.cpp   | 78 ++++++++++++++++++++++++
 3 files changed, 84 insertions(+), 1 deletion(-)
 create mode 100644 src/libcamera/pipeline/vivid/meson.build
 create mode 100644 src/libcamera/pipeline/vivid/vivid.cpp

diff --git a/meson_options.txt b/meson_options.txt
index e9e815fde366..ea38f1553240 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -16,7 +16,7 @@ option('gstreamer',
 
 option('pipelines',
         type : 'array',
-        choices : ['ipu3', 'raspberrypi', 'rkisp1', 'simple', 'uvcvideo', 'vimc'],
+        choices : ['ipu3', 'raspberrypi', 'rkisp1', 'simple', 'uvcvideo', 'vimc', 'vivid'],
         description : 'Select which pipeline handlers to include')
 
 option('qcam',
diff --git a/src/libcamera/pipeline/vivid/meson.build b/src/libcamera/pipeline/vivid/meson.build
new file mode 100644
index 000000000000..086bb825387c
--- /dev/null
+++ b/src/libcamera/pipeline/vivid/meson.build
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: CC0-1.0
+
+libcamera_sources += files([
+    'vivid.cpp',
+])
diff --git a/src/libcamera/pipeline/vivid/vivid.cpp b/src/libcamera/pipeline/vivid/vivid.cpp
new file mode 100644
index 000000000000..4418f616fe84
--- /dev/null
+++ b/src/libcamera/pipeline/vivid/vivid.cpp
@@ -0,0 +1,78 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2020, Google Inc.
+ *
+ * vivid.cpp - Pipeline handler for the vivid capture device
+ */
+
+#include "libcamera/internal/log.h"
+#include "libcamera/internal/pipeline_handler.h"
+
+namespace libcamera {
+
+LOG_DEFINE_CATEGORY(VIVID)
+
+class PipelineHandlerVivid : public PipelineHandler
+{
+public:
+	PipelineHandlerVivid(CameraManager *manager);
+
+	CameraConfiguration *generateConfiguration(Camera *camera,
+						   const StreamRoles &roles) override;
+	int configure(Camera *camera, CameraConfiguration *config) override;
+
+	int exportFrameBuffers(Camera *camera, Stream *stream,
+			       std::vector<std::unique_ptr<FrameBuffer>> *buffers) override;
+
+	int start(Camera *camera) override;
+	void stop(Camera *camera) override;
+
+	int queueRequestDevice(Camera *camera, Request *request) override;
+
+	bool match(DeviceEnumerator *enumerator) override;
+};
+
+PipelineHandlerVivid::PipelineHandlerVivid(CameraManager *manager)
+	: PipelineHandler(manager)
+{
+}
+
+CameraConfiguration *PipelineHandlerVivid::generateConfiguration(Camera *camera,
+								 const StreamRoles &roles)
+{
+	return nullptr;
+}
+
+int PipelineHandlerVivid::configure(Camera *camera, CameraConfiguration *config)
+{
+	return -1;
+}
+
+int PipelineHandlerVivid::exportFrameBuffers(Camera *camera, Stream *stream,
+					     std::vector<std::unique_ptr<FrameBuffer>> *buffers)
+{
+	return -1;
+}
+
+int PipelineHandlerVivid::start(Camera *camera)
+{
+	return -1;
+}
+
+void PipelineHandlerVivid::stop(Camera *camera)
+{
+}
+
+int PipelineHandlerVivid::queueRequestDevice(Camera *camera, Request *request)
+{
+	return -1;
+}
+
+bool PipelineHandlerVivid::match(DeviceEnumerator *enumerator)
+{
+	return false;
+}
+
+REGISTER_PIPELINE_HANDLER(PipelineHandlerVivid);
+
+} /* namespace libcamera */
-- 
2.25.1