libcamera/vivid.git - libcamera pipeline handler for VIVID

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/* SPDX-License-Identifier: LGPL-2.1-or-later */ /* * Copyright (C) 2020, Raspberry Pi (Trading) Ltd. * * rpi_stream.h - Raspberry Pi device stream abstraction class. */ #ifndef __LIBCAMERA_PIPELINE_RPI_STREAM_H__ #define __LIBCAMERA_PIPELINE_RPI_STREAM_H__ #include <queue> #include <string> #include <unordered_map> #include <vector> #include <libcamera/ipa/raspberrypi.h> #include <libcamera/stream.h> #include "libcamera/internal/v4l2_videodevice.h" namespace libcamera { namespace RPi { using BufferMap = std::unordered_map<unsigned int, FrameBuffer *>; /* * Device stream abstraction for either an internal or external stream. * Used for both Unicam and the ISP. */ class Stream : public libcamera::Stream { public: Stream() : id_(RPi::BufferMask::ID) { } Stream(const char *name, MediaEntity *dev, bool importOnly = false) : external_(false), importOnly_(importOnly), name_(name), dev_(std::make_unique<V4L2VideoDevice>(dev)), id_(RPi::BufferMask::ID) { } V4L2VideoDevice *dev() const; std::string name() const; bool isImporter() const; void reset(); void setExternal(bool external); bool isExternal() const; void setExportedBuffers(std::vector<std::unique_ptr<FrameBuffer>> *buffers); const BufferMap &getBuffers() const; int getBufferId(FrameBuffer *buffer) const; void setExternalBuffer(FrameBuffer *buffer); void removeExternalBuffer(FrameBuffer *buffer); int prepareBuffers(unsigned int count); int queueBuffer(FrameBuffer *buffer); void returnBuffer(FrameBuffer *buffer); int queueAllBuffers(); void releaseBuffers(); private: class IdGenerator { public: IdGenerator(int max) : max_(max), id_(0) { } int get() { int id; if (!recycle_.empty()) { id = recycle_.front(); recycle_.pop(); } else { id = id_++; ASSERT(id_ <= max_); } return id; } void release(int id) { recycle_.push(id); } void reset() { id_ = 0; recycle_ = {}; } private: int max_; int id_; std::queue<int> recycle_; }; void clearBuffers(); int queueToDevice(FrameBuffer *buffer); /* * Indicates that this stream is active externally, i.e. the buffers * might be provided by (and returned to) the application. */ bool external_;


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