From patchwork Fri Sep 18 13:50:34 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jacopo Mondi X-Patchwork-Id: 9659 Return-Path: X-Original-To: parsemail@patchwork.libcamera.org Delivered-To: parsemail@patchwork.libcamera.org Received: from lancelot.ideasonboard.com (lancelot.ideasonboard.com [92.243.16.209]) by patchwork.libcamera.org (Postfix) with ESMTPS id 2741EBF01C for ; Fri, 18 Sep 2020 13:47:18 +0000 (UTC) Received: from lancelot.ideasonboard.com (localhost [IPv6:::1]) by lancelot.ideasonboard.com (Postfix) with ESMTP id 0312662FC4; Fri, 18 Sep 2020 15:47:18 +0200 (CEST) Received: from relay2-d.mail.gandi.net (relay2-d.mail.gandi.net [217.70.183.194]) by lancelot.ideasonboard.com (Postfix) with ESMTPS id 26EE062F4F for ; Fri, 18 Sep 2020 15:47:17 +0200 (CEST) X-Originating-IP: 93.34.118.233 Received: from uno.lan (93-34-118-233.ip49.fastwebnet.it [93.34.118.233]) (Authenticated sender: jacopo@jmondi.org) by relay2-d.mail.gandi.net (Postfix) with ESMTPSA id A022240006; Fri, 18 Sep 2020 13:47:15 +0000 (UTC) From: Jacopo Mondi To: libcamera-devel@lists.libcamera.org Date: Fri, 18 Sep 2020 15:50:34 +0200 Message-Id: <20200918135041.91492-2-jacopo@jmondi.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200918135041.91492-1-jacopo@jmondi.org> References: <20200918135041.91492-1-jacopo@jmondi.org> MIME-Version: 1.0 Subject: [libcamera-devel] [PATCH v2 1/8] android: camera_device: Add CameraStream::Type 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: , Cc: hanlinchen@chromium.org Errors-To: libcamera-devel-bounces@lists.libcamera.org Sender: "libcamera-devel" Define the CameraStream::Type enumeration and assign it to each CameraStream instance at construction time. The CameraStream type will be used to decide if memory needs to be allocated on its behalf or if the stream is backed by memory externally allocated by the Android framework. Reviewed-by: Kieran Bingham Reviewed-by: Hirokazu Honda Reviewed-by: Niklas Söderlund Signed-off-by: Jacopo Mondi --- src/android/camera_device.cpp | 14 ++++-- src/android/camera_device.h | 87 ++++++++++++++++++++++++++++++++++- 2 files changed, 96 insertions(+), 5 deletions(-) diff --git a/src/android/camera_device.cpp b/src/android/camera_device.cpp index 70d77a17ef43..e4ffbc02c2da 100644 --- a/src/android/camera_device.cpp +++ b/src/android/camera_device.cpp @@ -169,9 +169,11 @@ MappedCamera3Buffer::MappedCamera3Buffer(const buffer_handle_t camera3buffer, } } -CameraStream::CameraStream(PixelFormat format, Size size, +CameraStream::CameraStream(PixelFormat format, Size size, Type type, unsigned int index, Encoder *encoder) - : format_(format), size_(size), index_(index), encoder_(encoder) + + : format_(format), size_(size), type_(type), index_(index), + encoder_(encoder) { } @@ -1222,12 +1224,14 @@ int CameraDevice::configureStreams(camera3_stream_configuration_t *stream_list) config_->addConfiguration(streamConfiguration); unsigned int index = config_->size() - 1; - streams_.emplace_back(format, size, index); + streams_.emplace_back(format, size, CameraStream::Type::Direct, + index); stream->priv = static_cast(&streams_.back()); } /* Now handle the MJPEG streams, adding a new stream if required. */ if (jpegStream) { + CameraStream::Type type; int index = -1; /* Search for a compatible stream in the non-JPEG ones. */ @@ -1245,6 +1249,7 @@ int CameraDevice::configureStreams(camera3_stream_configuration_t *stream_list) LOG(HAL, Info) << "Android JPEG stream mapped to libcamera stream " << i; + type = CameraStream::Type::Mapped; index = i; break; } @@ -1269,6 +1274,7 @@ int CameraDevice::configureStreams(camera3_stream_configuration_t *stream_list) LOG(HAL, Info) << "Adding " << streamConfiguration.toString() << " for MJPEG support"; + type = CameraStream::Type::Internal; config_->addConfiguration(streamConfiguration); index = config_->size() - 1; } @@ -1287,7 +1293,7 @@ int CameraDevice::configureStreams(camera3_stream_configuration_t *stream_list) return ret; } - streams_.emplace_back(formats::MJPEG, cfg.size, index, encoder); + streams_.emplace_back(formats::MJPEG, cfg.size, type, index, encoder); jpegStream->priv = static_cast(&streams_.back()); } diff --git a/src/android/camera_device.h b/src/android/camera_device.h index 1837748d2efc..9a9406cc257c 100644 --- a/src/android/camera_device.h +++ b/src/android/camera_device.h @@ -30,17 +30,102 @@ class CameraMetadata; class CameraStream { public: + /* + * Enumeration of CameraStream types. + * + * A camera stream associates an Android stream to a libcamera stream. + * This enumeration describes how the two streams are associated and how + * and where data produced from libcamera are delivered to the + * Android framework. + * + * Direct: + * + * The Android stream is directly mapped onto a libcamera stream: frames + * are delivered by the library directly in the memory location + * specified by the Android stream (buffer_handle_t->data) and provided + * to the framework as they are. The Android stream characteristics are + * directly translated to the libcamera stream configuration. + * + * +-----+ +-----+ + * | A | | L | + * +-----+ +-----+ + * | | + * V V + * +-----+ +------+ + * | B |<---------------| FB | + * +-----+ +------+ + * + * + * Internal: + * + * Data for the Android stream is produced by processing a libcamera + * stream created by the HAL for that purpose. The libcamera stream + * needs to be supplied with intermediate buffers where the library + * delivers frames to be processed and then provided to the framework. + * The libcamera stream configuration is not a direct translation of the + * Android stream characteristics, but it describes the format and size + * required for the processing procedure to produce frames in the + * Android required format. + * + * +-----+ +-----+ +-----+ + * | A | | L |--->| FB | + * +-----+ +-----+ +-----+ + * | | | + * V V | + * +-----+ +------+ | + * | B | | B |<----+ + * +-----+ +------+ + * ^ | + * |-------Processing------| + * + * + * Mapped: + * + * Data for the Android stream is produced by processing a libcamera + * stream associated with another CameraStream. Mapped camera streams do + * not need any memory to be reserved for them as they process data + * produced by libcamera for a different stream whose format and size + * is compatible with the processing procedure requirements to produce + * frames in the Android required format. + * + * +-----+ +-----+ +-----+ + * | A | | A' | | L | + * +-----+ +-----+ +-----+ + * | | | + * V V V + * +-----+ +-----+ +------+ + * | B | | B' |<---------| FB | + * +-----+ +-----+ +------+ + * ^ | + * |--Processing--| + * + * + * -------------------------------------------------------------------- + * A = Android stream + * L = libcamera stream + * B = memory buffer + * FB = libcamera FrameBuffer + * "Processing" = Frame processing procedure (Encoding, scaling etc) + */ + enum class Type { + Direct, + Internal, + Mapped, + }; + CameraStream(libcamera::PixelFormat format, libcamera::Size size, - unsigned int index, Encoder *encoder = nullptr); + Type type, unsigned int index, Encoder *encoder = nullptr); const libcamera::PixelFormat &format() const { return format_; } const libcamera::Size &size() const { return size_; } + Type type() const { return type_; } unsigned int index() const { return index_; } Encoder *encoder() const { return encoder_.get(); } private: libcamera::PixelFormat format_; libcamera::Size size_; + Type type_; /* * The index of the libcamera StreamConfiguration as added during * configureStreams(). A single libcamera Stream may be used to deliver