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-rw-r--r--include/libcamera/internal/converter.h108
-rw-r--r--include/libcamera/internal/meson.build1
2 files changed, 109 insertions, 0 deletions
diff --git a/include/libcamera/internal/converter.h b/include/libcamera/internal/converter.h
new file mode 100644
index 00000000..834ec5ab
--- /dev/null
+++ b/include/libcamera/internal/converter.h
@@ -0,0 +1,108 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2020, Laurent Pinchart
+ * Copyright 2022 NXP
+ *
+ * converter.h - Generic format converter interface
+ */
+
+#pragma once
+
+#include <functional>
+#include <initializer_list>
+#include <map>
+#include <memory>
+#include <string>
+#include <tuple>
+#include <vector>
+
+#include <libcamera/base/class.h>
+#include <libcamera/base/signal.h>
+
+#include <libcamera/geometry.h>
+
+namespace libcamera {
+
+class FrameBuffer;
+class MediaDevice;
+class PixelFormat;
+struct StreamConfiguration;
+
+class Converter
+{
+public:
+ Converter(MediaDevice *media);
+ virtual ~Converter();
+
+ virtual int loadConfiguration(const std::string &filename) = 0;
+
+ virtual bool isValid() const = 0;
+
+ virtual std::vector<PixelFormat> formats(PixelFormat input) = 0;
+ virtual SizeRange sizes(const Size &input) = 0;
+
+ virtual std::tuple<unsigned int, unsigned int>
+ strideAndFrameSize(const PixelFormat &pixelFormat, const Size &size) = 0;
+
+ virtual int configure(const StreamConfiguration &inputCfg,
+ const std::vector<std::reference_wrapper<StreamConfiguration>> &outputCfgs) = 0;
+ virtual int exportBuffers(unsigned int output, unsigned int count,
+ std::vector<std::unique_ptr<FrameBuffer>> *buffers) = 0;
+
+ virtual int start() = 0;
+ virtual void stop() = 0;
+
+ virtual int queueBuffers(FrameBuffer *input,
+ const std::map<unsigned int, FrameBuffer *> &outputs) = 0;
+
+ Signal<FrameBuffer *> inputBufferReady;
+ Signal<FrameBuffer *> outputBufferReady;
+
+ const std::string &deviceNode() const { return deviceNode_; }
+
+private:
+ std::string deviceNode_;
+};
+
+class ConverterFactoryBase
+{
+public:
+ ConverterFactoryBase(const std::string name, std::initializer_list<std::string> compatibles);
+ virtual ~ConverterFactoryBase() = default;
+
+ const std::vector<std::string> &compatibles() const { return compatibles_; }
+
+ static std::unique_ptr<Converter> create(MediaDevice *media);
+ static std::vector<ConverterFactoryBase *> &factories();
+ static std::vector<std::string> names();
+
+private:
+ LIBCAMERA_DISABLE_COPY_AND_MOVE(ConverterFactoryBase)
+
+ static void registerType(ConverterFactoryBase *factory);
+
+ virtual std::unique_ptr<Converter> createInstance(MediaDevice *media) const = 0;
+
+ std::string name_;
+ std::vector<std::string> compatibles_;
+};
+
+template<typename _Converter>
+class ConverterFactory : public ConverterFactoryBase
+{
+public:
+ ConverterFactory(const char *name, std::initializer_list<std::string> compatibles)
+ : ConverterFactoryBase(name, compatibles)
+ {
+ }
+
+ std::unique_ptr<Converter> createInstance(MediaDevice *media) const override
+ {
+ return std::make_unique<_Converter>(media);
+ }
+};
+
+#define REGISTER_CONVERTER(name, converter, compatibles) \
+ static ConverterFactory<converter> global_##converter##Factory(name, compatibles);
+
+} /* namespace libcamera */
diff --git a/include/libcamera/internal/meson.build b/include/libcamera/internal/meson.build
index f8be86e0..341af8a2 100644
--- a/include/libcamera/internal/meson.build
+++ b/include/libcamera/internal/meson.build
@@ -19,6 +19,7 @@ libcamera_internal_headers = files([
'camera_sensor_properties.h',
'control_serializer.h',
'control_validator.h',
+ 'converter.h',
'delayed_controls.h',
'device_enumerator.h',
'device_enumerator_sysfs.h',