fca7602c3c
Add a new field to the Buffer class to report its completion status, with a new cancel() method to mark the buffer as cancelled. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
93 lines
1.5 KiB
C++
93 lines
1.5 KiB
C++
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* Copyright (C) 2019, Google Inc.
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*
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* buffer.h - Buffer handling
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*/
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#ifndef __LIBCAMERA_BUFFER_H__
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#define __LIBCAMERA_BUFFER_H__
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#include <stdint.h>
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#include <vector>
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#include <libcamera/signal.h>
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namespace libcamera {
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class BufferPool;
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class Plane final
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{
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public:
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Plane();
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~Plane();
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int dmabuf() const { return fd_; }
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int setDmabuf(int fd, unsigned int length);
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void *mem();
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unsigned int length() const { return length_; }
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private:
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int mmap();
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int munmap();
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int fd_;
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unsigned int length_;
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void *mem_;
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};
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class Buffer final
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{
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public:
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enum Status {
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BufferSuccess,
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BufferError,
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BufferCancelled,
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};
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Buffer();
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unsigned int index() const { return index_; }
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unsigned int bytesused() const { return bytesused_; }
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uint64_t timestamp() const { return timestamp_; }
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unsigned int sequence() const { return sequence_; }
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Status status() const { return status_; }
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std::vector<Plane> &planes() { return planes_; }
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Signal<Buffer *> completed;
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private:
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friend class BufferPool;
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friend class V4L2Device;
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void cancel();
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unsigned int index_;
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unsigned int bytesused_;
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uint64_t timestamp_;
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unsigned int sequence_;
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Status status_;
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std::vector<Plane> planes_;
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};
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class BufferPool final
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{
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public:
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~BufferPool();
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void createBuffers(unsigned int count);
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void destroyBuffers();
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unsigned int count() const { return buffers_.size(); }
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std::vector<Buffer> &buffers() { return buffers_; }
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private:
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std::vector<Buffer> buffers_;
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};
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} /* namespace libcamera */
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#endif /* __LIBCAMERA_BUFFER_H__ */
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