diff options
| -rw-r--r-- | src/libcamera/geometry.cpp | 34 | ||||
| -rw-r--r-- | src/libcamera/include/geometry.h | 12 | ||||
| -rw-r--r-- | src/libcamera/include/v4l2_subdevice.h | 11 | ||||
| -rw-r--r-- | 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 57f4fc77..b6b6592b 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 cc146da7..eadc4ed4 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 669e79f9..1cc0fab7 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 <map> #include <string> +#include <vector> +#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<unsigned int, std::vector<SizeRange>> + 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<SizeRange> *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 87377762..394ed0f0 100644 --- a/src/libcamera/v4l2_subdevice.cpp +++ b/src/libcamera/v4l2_subdevice.cpp @@ -184,6 +184,59 @@ int V4L2Subdevice::setCompose(unsigned int pad, Rectangle *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<unsigned int, std::vector<SizeRange>> +V4L2Subdevice::formats(unsigned int pad) +{ + std::map<unsigned int, std::vector<SizeRange>> 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 * \param[out] format The image bus format @@ -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<SizeRange> *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) { |