1 files changed, 77 insertions, 0 deletions
diff --git a/include/libcamera/internal/v4l2_subdevice.h b/include/libcamera/internal/v4l2_subdevice.h
new file mode 100644
index 00000000..1be454f0
--- /dev/null
+++ b/include/libcamera/internal/v4l2_subdevice.h
@@ -0,0 +1,77 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * v4l2_subdevice.h - V4L2 Subdevice
+ */
+#ifndef __LIBCAMERA_V4L2_SUBDEVICE_H__
+#define __LIBCAMERA_V4L2_SUBDEVICE_H__
+
+#include <string>
+#include <vector>
+
+#include <libcamera/geometry.h>
+
+#include "libcamera/internal/formats.h"
+#include "libcamera/internal/log.h"
+#include "libcamera/internal/media_object.h"
+#include "libcamera/internal/v4l2_device.h"
+
+namespace libcamera {
+
+class MediaDevice;
+
+struct V4L2SubdeviceFormat {
+	uint32_t mbus_code;
+	Size size;
+
+	const std::string toString() const;
+	uint8_t bitsPerPixel() const;
+};
+
+class V4L2Subdevice : public V4L2Device
+{
+public:
+	enum Whence {
+		ActiveFormat,
+		TryFormat,
+	};
+
+	explicit V4L2Subdevice(const MediaEntity *entity);
+	V4L2Subdevice(const V4L2Subdevice &) = delete;
+	V4L2Subdevice &operator=(const V4L2Subdevice &) = delete;
+	~V4L2Subdevice();
+
+	int open();
+
+	const MediaEntity *entity() const { return entity_; }
+
+	int getSelection(unsigned int pad, unsigned int target,
+			 Rectangle *rect);
+	int setSelection(unsigned int pad, unsigned int target,
+			 Rectangle *rect);
+
+	ImageFormats formats(unsigned int pad);
+
+	int getFormat(unsigned int pad, V4L2SubdeviceFormat *format,
+		      Whence whence = ActiveFormat);
+	int setFormat(unsigned int pad, V4L2SubdeviceFormat *format,
+		      Whence whence = ActiveFormat);
+
+	static V4L2Subdevice *fromEntityName(const MediaDevice *media,
+					     const std::string &entity);
+
+protected:
+	std::string logPrefix() const;
+
+private:
+	std::vector<unsigned int> enumPadCodes(unsigned int pad);
+	std::vector<SizeRange> enumPadSizes(unsigned int pad,
+					    unsigned int code);
+
+	const MediaEntity *entity_;
+};
+
+} /* namespace libcamera */
+
+#endif /* __LIBCAMERA_V4L2_SUBDEVICE_H__ */