From patchwork Fri Mar 1 15:40:59 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jacopo Mondi X-Patchwork-Id: 696 Return-Path: Received: from relay6-d.mail.gandi.net (relay6-d.mail.gandi.net [217.70.183.198]) by lancelot.ideasonboard.com (Postfix) with ESMTPS id 8DD1B610C0 for ; Fri, 1 Mar 2019 16:40:42 +0100 (CET) X-Originating-IP: 2.224.242.101 Received: from uno.lan (2-224-242-101.ip172.fastwebnet.it [2.224.242.101]) (Authenticated sender: jacopo@jmondi.org) by relay6-d.mail.gandi.net (Postfix) with ESMTPSA id 185B2C0002; Fri, 1 Mar 2019 15:40:41 +0000 (UTC) From: Jacopo Mondi To: libcamera-devel@lists.libcamera.org Date: Fri, 1 Mar 2019 16:40:59 +0100 Message-Id: <20190301154103.19588-2-jacopo@jmondi.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190301154103.19588-1-jacopo@jmondi.org> References: <20190301154103.19588-1-jacopo@jmondi.org> MIME-Version: 1.0 Subject: [libcamera-devel] [PATCH v7 1/5] libcamera: v4l2_subdevice: Implement ENUM_FRAME_SIZES X-BeenThere: libcamera-devel@lists.libcamera.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 01 Mar 2019 15:40:42 -0000 Implement format and size enumeration methods to list all the available subdevice image resolutions and formats. Signed-off-by: Jacopo Mondi --- src/libcamera/geometry.cpp | 34 ++++++++++ src/libcamera/include/geometry.h | 12 ++++ src/libcamera/include/v4l2_subdevice.h | 11 +++- src/libcamera/v4l2_subdevice.cpp | 87 ++++++++++++++++++++++++++ 4 files changed, 142 insertions(+), 2 deletions(-) diff --git a/src/libcamera/geometry.cpp b/src/libcamera/geometry.cpp index 57f4fc7716d9..b6b6592bdfec 100644 --- a/src/libcamera/geometry.cpp +++ b/src/libcamera/geometry.cpp @@ -46,4 +46,38 @@ namespace libcamera { * \brief The distance between the top and bottom sides */ +/** + * \struct SizeRange + * \brief Describe a range of image sizes + * + * SizeRange describes a range of image sizes included in the (minWidth, + * minHeight) - (maxWidth, maxHeight) interval. If the minimum and + * maximum sizes are identical it represents a single image resolution. + */ + +/** + * \fn SizeRange::SizeRange() + * \brief Construct a size range + */ + +/** + * \var SizeRange::minWidth + * \brief The minimum image width + */ + +/** + * \var SizeRange::minHeight + * \brief The minimum image height + */ + +/** + * \var SizeRange::maxWidth + * \brief The maximum image width + */ + +/** + * \var SizeRange::maxHeight + * \brief The maximum image height + */ + } /* namespace libcamera */ diff --git a/src/libcamera/include/geometry.h b/src/libcamera/include/geometry.h index cc146da7cb0d..eadc4ed4f9cb 100644 --- a/src/libcamera/include/geometry.h +++ b/src/libcamera/include/geometry.h @@ -17,6 +17,18 @@ struct Rectangle { unsigned int h; }; +struct SizeRange { + SizeRange(unsigned int minW, unsigned int minH, + unsigned int maxW, unsigned int maxH) + : minWidth(minW), minHeight(minH), maxWidth(maxW), + maxHeight(maxH) {} + + unsigned int minWidth; + unsigned int minHeight; + unsigned int maxWidth; + unsigned int maxHeight; +}; + } /* namespace libcamera */ #endif /* __LIBCAMERA_GEOMETRY_H__ */ diff --git a/src/libcamera/include/v4l2_subdevice.h b/src/libcamera/include/v4l2_subdevice.h index 669e79f9a9fd..1cc0fab73103 100644 --- a/src/libcamera/include/v4l2_subdevice.h +++ b/src/libcamera/include/v4l2_subdevice.h @@ -7,15 +7,16 @@ #ifndef __LIBCAMERA_V4L2_SUBDEVICE_H__ #define __LIBCAMERA_V4L2_SUBDEVICE_H__ +#include #include +#include +#include "geometry.h" #include "log.h" #include "media_object.h" namespace libcamera { -struct Rectangle; - struct V4L2SubdeviceFormat { uint32_t mbus_code; uint32_t width; @@ -39,6 +40,9 @@ public: int setCrop(unsigned int pad, Rectangle *rect); int setCompose(unsigned int pad, Rectangle *rect); + const std::map> + formats(unsigned int pad); + int getFormat(unsigned int pad, V4L2SubdeviceFormat *format); int setFormat(unsigned int pad, V4L2SubdeviceFormat *format); @@ -46,6 +50,9 @@ protected: std::string logPrefix() const; private: + int enumPadSizes(unsigned int pad, unsigned int code, + std::vector *size); + int setSelection(unsigned int pad, unsigned int target, Rectangle *rect); diff --git a/src/libcamera/v4l2_subdevice.cpp b/src/libcamera/v4l2_subdevice.cpp index 87377762664d..394ed0f061f3 100644 --- a/src/libcamera/v4l2_subdevice.cpp +++ b/src/libcamera/v4l2_subdevice.cpp @@ -183,6 +183,59 @@ int V4L2Subdevice::setCompose(unsigned int pad, Rectangle *rect) return setSelection(pad, V4L2_SEL_TGT_COMPOSE, rect); } +/** + * \brief List the sub-device image resolutions and formats on \a pad + * \param[in] pad The 0-indexed pad number to enumerate formats on + * + * Retrieve a list of image formats and sizes on the \a pad of a video + * subdevice. Subdevices can report either a list of discrete sizes they + * support or a list of intervals expressed as a [min-max] sizes range. + * + * Each image size list is associated with a media bus pixel code for which + * the reported resolutions are supported. + * + * \return A map of image formats associated with a list of image sizes, or + * an empty map on error or if the pad does not exist + */ +const std::map> +V4L2Subdevice::formats(unsigned int pad) +{ + std::map> formatMap = {}; + struct v4l2_subdev_mbus_code_enum mbusEnum = {}; + int ret; + + if (pad >= entity_->pads().size()) { + LOG(V4L2Subdev, Error) << "Invalid pad: " << pad; + return formatMap; + } + + mbusEnum.pad = pad; + mbusEnum.index = 0; + mbusEnum.which = V4L2_SUBDEV_FORMAT_ACTIVE; + while (true) { + ret = ioctl(fd_, VIDIOC_SUBDEV_ENUM_MBUS_CODE, &mbusEnum); + if (ret) + break; + + ret = enumPadSizes(pad, mbusEnum.code, + &formatMap[mbusEnum.code]); + if (ret) + break; + + mbusEnum.index++; + } + + if (ret && (errno != EINVAL && errno != ENOTTY)) { + ret = -errno; + LOG(V4L2Subdev, Error) + << "Unable to enumerate formats on pad " << pad + << ": " << strerror(-ret); + formatMap.clear(); + } + + return formatMap; +} + /** * \brief Retrieve the image format set on one of the V4L2 subdevice pads * \param[in] pad The 0-indexed pad number the format is to be retrieved from @@ -248,6 +301,40 @@ int V4L2Subdevice::setFormat(unsigned int pad, V4L2SubdeviceFormat *format) return 0; } +int V4L2Subdevice::enumPadSizes(unsigned int pad,unsigned int code, + std::vector *sizes) +{ + struct v4l2_subdev_frame_size_enum sizeEnum = {}; + int ret; + + sizeEnum.index = 0; + sizeEnum.pad = pad; + sizeEnum.code = code; + sizeEnum.which = V4L2_SUBDEV_FORMAT_ACTIVE; + while (true) { + ret = ioctl(fd_, VIDIOC_SUBDEV_ENUM_FRAME_SIZE, &sizeEnum); + if (ret) + break; + + sizes->emplace_back(sizeEnum.min_width, sizeEnum.min_height, + sizeEnum.max_width, sizeEnum.max_height); + + sizeEnum.index++; + } + + if (ret && (errno != EINVAL && errno != ENOTTY)) { + ret = -errno; + LOG(V4L2Subdev, Error) + << "Unable to enumerate sizes on pad " << pad + << ": " << strerror(-ret); + sizes->clear(); + + return ret; + } + + return 0; +} + int V4L2Subdevice::setSelection(unsigned int pad, unsigned int target, Rectangle *rect) {