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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2020, Laurent Pinchart
*
* converter.h - Format converter for simple pipeline handler
*/
#pragma once
#include <functional>
#include <map>
#include <memory>
#include <string>
#include <tuple>
#include <vector>
#include <libcamera/pixel_format.h>
#include <libcamera/base/log.h>
#include <libcamera/base/signal.h>
namespace libcamera {
class FrameBuffer;
class MediaDevice;
class Size;
class SizeRange;
struct StreamConfiguration;
class V4L2M2MDevice;
class SimpleConverter
{
public:
SimpleConverter(MediaDevice *media);
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);
Signal<FrameBuffer *> inputBufferReady;
Signal<FrameBuffer *> outputBufferReady;
private:
class Stream : protected Loggable
{
public:
Stream(SimpleConverter *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);
SimpleConverter *converter_;
unsigned int index_;
std::unique_ptr<V4L2M2MDevice> m2m_;
unsigned int inputBufferCount_;
unsigned int outputBufferCount_;
};
std::string deviceNode_;
std::unique_ptr<V4L2M2MDevice> m2m_;
std::vector<Stream> streams_;
std::map<FrameBuffer *, unsigned int> queue_;
};
} /* namespace libcamera */
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