From patchwork Mon Dec 30 12:04:50 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Niklas_S=C3=B6derlund?= X-Patchwork-Id: 2455 Return-Path: Received: from bin-mail-out-06.binero.net (bin-mail-out-06.binero.net [195.74.38.229]) by lancelot.ideasonboard.com (Postfix) with ESMTPS id A3F596046B for ; Mon, 30 Dec 2019 13:05:53 +0100 (CET) X-Halon-ID: b9b1ae93-2afc-11ea-a00b-005056917a89 Authorized-sender: niklas@soderlund.pp.se Received: from bismarck.berto.se (p4fca2fd0.dip0.t-ipconnect.de [79.202.47.208]) by bin-vsp-out-01.atm.binero.net (Halon) with ESMTPA id b9b1ae93-2afc-11ea-a00b-005056917a89; Mon, 30 Dec 2019 13:05:52 +0100 (CET) From: =?utf-8?q?Niklas_S=C3=B6derlund?= To: libcamera-devel@lists.libcamera.org Date: Mon, 30 Dec 2019 13:04:50 +0100 Message-Id: <20191230120510.938333-6-niklas.soderlund@ragnatech.se> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191230120510.938333-1-niklas.soderlund@ragnatech.se> References: <20191230120510.938333-1-niklas.soderlund@ragnatech.se> MIME-Version: 1.0 Subject: [libcamera-devel] [PATCH v2 05/25] libcamera: buffers: Remove Plane class X-BeenThere: libcamera-devel@lists.libcamera.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 30 Dec 2019 12:05:53 -0000 There are no users left of the Plane class, drop it. Signed-off-by: Niklas Söderlund Reviewed-by: Laurent Pinchart Reviewed-by: Jacopo Mondi Reviewed-by: Laurent Pinchart --- include/libcamera/buffer.h | 21 ------ src/libcamera/buffer.cpp | 149 ------------------------------------- 2 files changed, 170 deletions(-) diff --git a/include/libcamera/buffer.h b/include/libcamera/buffer.h index 71633492e4752efb..2d8885e9f3a1234f 100644 --- a/include/libcamera/buffer.h +++ b/include/libcamera/buffer.h @@ -65,27 +65,6 @@ private: unsigned int cookie_; }; -class Plane final -{ -public: - Plane(); - ~Plane(); - - int dmabuf() const { return fd_; } - int setDmabuf(int fd, unsigned int length); - - void *mem(); - unsigned int length() const { return length_; } - -private: - int mmap(); - int munmap(); - - int fd_; - unsigned int length_; - void *mem_; -}; - class BufferMemory final { public: diff --git a/src/libcamera/buffer.cpp b/src/libcamera/buffer.cpp index fde0b33511c64c9e..3ea982306843b116 100644 --- a/src/libcamera/buffer.cpp +++ b/src/libcamera/buffer.cpp @@ -85,155 +85,6 @@ LOG_DEFINE_CATEGORY(Buffer) * \brief Array holding plane specific metadata */ -/** - * \class Plane - * \brief A memory region to store a single plane of a frame - * - * Planar pixel formats use multiple memory regions to store planes - * corresponding to the different colour components of a frame. The Plane class - * tracks the specific details of a memory region used to store a single plane - * for a given frame and provides the means to access the memory, both for the - * application and for DMA. A Buffer then contains one or multiple planes - * depending on its pixel format. - * - * To support DMA access, planes are associated with dmabuf objects represented - * by file handles. Each plane carries a dmabuf file handle and an offset within - * the buffer. Those file handles may refer to the same dmabuf object, depending - * on whether the devices accessing the memory regions composing the image - * support non-contiguous DMA to planes ore require DMA-contiguous memory. - * - * To support CPU access, planes carry the CPU address of their backing memory. - * Similarly to the dmabuf file handles, the CPU addresses for planes composing - * an image may or may not be contiguous. - */ - -Plane::Plane() - : fd_(-1), length_(0), mem_(0) -{ -} - -Plane::~Plane() -{ - munmap(); - - if (fd_ != -1) - close(fd_); -} - -/** - * \fn Plane::dmabuf() - * \brief Get the dmabuf file handle backing the buffer - */ - -/** - * \brief Set the dmabuf file handle backing the buffer - * \param[in] fd The dmabuf file handle - * \param[in] length The size of the memory region - * - * The \a fd dmabuf file handle is duplicated and stored. The caller may close - * the original file handle. - * - * \return 0 on success or a negative error code otherwise - */ -int Plane::setDmabuf(int fd, unsigned int length) -{ - if (fd < 0) { - LOG(Buffer, Error) << "Invalid dmabuf fd provided"; - return -EINVAL; - } - - if (fd_ != -1) { - close(fd_); - fd_ = -1; - } - - fd_ = dup(fd); - if (fd_ == -1) { - int ret = -errno; - LOG(Buffer, Error) - << "Failed to duplicate dmabuf: " << strerror(-ret); - return ret; - } - - length_ = length; - - return 0; -} - -/** - * \brief Map the plane memory data to a CPU accessible address - * - * The file descriptor to map the memory from must be set by a call to - * setDmaBuf() before calling this function. - * - * \sa setDmaBuf() - * - * \return 0 on success or a negative error code otherwise - */ -int Plane::mmap() -{ - void *map; - - if (mem_) - return 0; - - map = ::mmap(NULL, length_, PROT_READ | PROT_WRITE, MAP_SHARED, fd_, 0); - if (map == MAP_FAILED) { - int ret = -errno; - LOG(Buffer, Error) - << "Failed to mmap plane: " << strerror(-ret); - return ret; - } - - mem_ = map; - - return 0; -} - -/** - * \brief Unmap any existing CPU accessible mapping - * - * Unmap the memory mapped by an earlier call to mmap(). - * - * \return 0 on success or a negative error code otherwise - */ -int Plane::munmap() -{ - int ret = 0; - - if (mem_) - ret = ::munmap(mem_, length_); - - if (ret) { - ret = -errno; - LOG(Buffer, Warning) - << "Failed to unmap plane: " << strerror(-ret); - } else { - mem_ = 0; - } - - return ret; -} - -/** - * \fn Plane::mem() - * \brief Retrieve the CPU accessible memory address of the Plane - * \return The CPU accessible memory address on success or nullptr otherwise. - */ -void *Plane::mem() -{ - if (!mem_) - mmap(); - - return mem_; -} - -/** - * \fn Plane::length() const - * \brief Retrieve the length of the memory region - * \return The length of the memory region - */ - /** * \class BufferMemory * \brief A memory buffer to store an image