diff options
Diffstat (limited to 'src/libcamera/framebuffer.cpp')
| -rw-r--r-- | src/libcamera/framebuffer.cpp | 150 |
1 files changed, 0 insertions, 150 deletions
diff --git a/src/libcamera/framebuffer.cpp b/src/libcamera/framebuffer.cpp index 41e6e68f..42c73134 100644 --- a/src/libcamera/framebuffer.cpp +++ b/src/libcamera/framebuffer.cpp @@ -8,11 +8,6 @@ #include <libcamera/framebuffer.h> #include "libcamera/internal/framebuffer.h" -#include <errno.h> -#include <string.h> -#include <sys/mman.h> -#include <unistd.h> - #include <libcamera/base/log.h> /** @@ -251,149 +246,4 @@ Request *FrameBuffer::request() const * indicate that the metadata is invalid. */ -/** - * \class MappedBuffer - * \brief Provide an interface to support managing memory mapped buffers - * - * The MappedBuffer interface provides access to a set of MappedPlanes which - * are available for access by the CPU. - * - * This class is not meant to be constructed directly, but instead derived - * classes should be used to implement the correct mapping of a source buffer. - * - * This allows treating CPU accessible memory through a generic interface - * regardless of whether it originates from a libcamera FrameBuffer or other - * source. - */ - -/** - * \typedef MappedBuffer::Plane - * \brief A mapped region of memory accessible to the CPU - * - * The MappedBuffer::Plane uses the Span interface to describe the mapped memory - * region. - */ - -/** - * \brief Construct an empty MappedBuffer - */ -MappedBuffer::MappedBuffer() - : error_(0) -{ -} - -/** - * \brief Move constructor, construct the MappedBuffer with the contents of \a - * other using move semantics - * \param[in] other The other MappedBuffer - * - * Moving a MappedBuffer moves the mappings contained in the \a other to the new - * MappedBuffer and invalidates the \a other. - * - * No mappings are unmapped or destroyed in this process. - */ -MappedBuffer::MappedBuffer(MappedBuffer &&other) -{ - *this = std::move(other); -} - -/** - * \brief Move assignment operator, replace the mappings with those of \a other -* \param[in] other The other MappedBuffer - * - * Moving a MappedBuffer moves the mappings contained in the \a other to the new - * MappedBuffer and invalidates the \a other. - * - * No mappings are unmapped or destroyed in this process. - */ -MappedBuffer &MappedBuffer::operator=(MappedBuffer &&other) -{ - error_ = other.error_; - maps_ = std::move(other.maps_); - other.error_ = -ENOENT; - - return *this; -} - -MappedBuffer::~MappedBuffer() -{ - for (Plane &map : maps_) - munmap(map.data(), map.size()); -} - -/** - * \fn MappedBuffer::isValid() - * \brief Check if the MappedBuffer instance is valid - * \return True if the MappedBuffer has valid mappings, false otherwise - */ - -/** - * \fn MappedBuffer::error() - * \brief Retrieve the map error status - * - * This function retrieves the error status from the MappedBuffer. - * The error status is a negative number as defined by errno.h. If - * no error occurred, this function returns 0. - * - * \return The map error code - */ - -/** - * \fn MappedBuffer::maps() - * \brief Retrieve the mapped planes - * - * This function retrieves the successfully mapped planes stored as a vector - * of Span<uint8_t> to provide access to the mapped memory. - * - * \return A vector of the mapped planes - */ - -/** - * \var MappedBuffer::error_ - * \brief Stores the error value if present - * - * MappedBuffer derived classes shall set this to a negative value as defined - * by errno.h if an error occured during the mapping process. - */ - -/** - * \var MappedBuffer::maps_ - * \brief Stores the internal mapped planes - * - * MappedBuffer derived classes shall store the mappings they create in this - * vector which is parsed during destruct to unmap any memory mappings which - * completed successfully. - */ - -/** - * \class MappedFrameBuffer - * \brief Map a FrameBuffer using the MappedBuffer interface - */ - -/** - * \brief Map all planes of a FrameBuffer - * \param[in] buffer FrameBuffer to be mapped - * \param[in] flags Protection flags to apply to map - * - * Construct an object to map a frame buffer for CPU access. - * The flags are passed directly to mmap and should be either PROT_READ, - * PROT_WRITE, or a bitwise-or combination of both. - */ -MappedFrameBuffer::MappedFrameBuffer(const FrameBuffer *buffer, int flags) -{ - maps_.reserve(buffer->planes().size()); - - for (const FrameBuffer::Plane &plane : buffer->planes()) { - void *address = mmap(nullptr, plane.length, flags, - MAP_SHARED, plane.fd.fd(), 0); - if (address == MAP_FAILED) { - error_ = -errno; - LOG(Buffer, Error) << "Failed to mmap plane"; - break; - } - - maps_.emplace_back(static_cast<uint8_t *>(address), plane.length); - } -} - } /* namespace libcamera */ |