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Diffstat (limited to 'include/libcamera/internal/converter/converter_v4l2_m2m.h')
-rw-r--r--include/libcamera/internal/converter/converter_v4l2_m2m.h98
1 files changed, 98 insertions, 0 deletions
diff --git a/include/libcamera/internal/converter/converter_v4l2_m2m.h b/include/libcamera/internal/converter/converter_v4l2_m2m.h
new file mode 100644
index 00000000..815916d0
--- /dev/null
+++ b/include/libcamera/internal/converter/converter_v4l2_m2m.h
@@ -0,0 +1,98 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2020, Laurent Pinchart
+ * Copyright 2022 NXP
+ *
+ * converter_v4l2_m2m.h - V4l2 M2M Format converter interface
+ */
+
+#pragma once
+
+#include <functional>
+#include <map>
+#include <memory>
+#include <string>
+#include <tuple>
+#include <vector>
+
+#include <libcamera/base/log.h>
+#include <libcamera/base/signal.h>
+
+#include <libcamera/pixel_format.h>
+
+#include "libcamera/internal/converter.h"
+
+namespace libcamera {
+
+class FrameBuffer;
+class MediaDevice;
+class Size;
+class SizeRange;
+struct StreamConfiguration;
+class V4L2M2MDevice;
+
+class V4L2M2MConverter : public Converter
+{
+public:
+ V4L2M2MConverter(MediaDevice *media);
+
+ int loadConfiguration([[maybe_unused]] const std::string &filename) { return 0; }
+ bool isValid() const { return m2m_ != nullptr; }
+
+ std::vector<PixelFormat> formats(PixelFormat input);
+ SizeRange sizes(const Size &input);
+
+ std::tuple<unsigned int, unsigned int>
+ strideAndFrameSize(const PixelFormat &pixelFormat, const Size &size);
+
+ int configure(const StreamConfiguration &inputCfg,
+ const std::vector<std::reference_wrapper<StreamConfiguration>> &outputCfg);
+ int exportBuffers(unsigned int ouput, unsigned int count,
+ std::vector<std::unique_ptr<FrameBuffer>> *buffers);
+
+ int start();
+ void stop();
+
+ int queueBuffers(FrameBuffer *input,
+ const std::map<unsigned int, FrameBuffer *> &outputs);
+
+private:
+ class Stream : protected Loggable
+ {
+ public:
+ Stream(V4L2M2MConverter *converter, unsigned int index);
+
+ bool isValid() const { return m2m_ != nullptr; }
+
+ int configure(const StreamConfiguration &inputCfg,
+ const StreamConfiguration &outputCfg);
+ int exportBuffers(unsigned int count,
+ std::vector<std::unique_ptr<FrameBuffer>> *buffers);
+
+ int start();
+ void stop();
+
+ int queueBuffers(FrameBuffer *input, FrameBuffer *output);
+
+ protected:
+ std::string logPrefix() const override;
+
+ private:
+ void captureBufferReady(FrameBuffer *buffer);
+ void outputBufferReady(FrameBuffer *buffer);
+
+ V4L2M2MConverter *converter_;
+ unsigned int index_;
+ std::unique_ptr<V4L2M2MDevice> m2m_;
+
+ unsigned int inputBufferCount_;
+ unsigned int outputBufferCount_;
+ };
+
+ std::unique_ptr<V4L2M2MDevice> m2m_;
+
+ std::vector<Stream> streams_;
+ std::map<FrameBuffer *, unsigned int> queue_;
+};
+
+} /* namespace libcamera */