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-rw-r--r--src/libcamera/v4l2_videodevice.cpp32
1 files changed, 32 insertions, 0 deletions
diff --git a/src/libcamera/v4l2_videodevice.cpp b/src/libcamera/v4l2_videodevice.cpp
index 93cb1697..14eba056 100644
--- a/src/libcamera/v4l2_videodevice.cpp
+++ b/src/libcamera/v4l2_videodevice.cpp
@@ -1215,6 +1215,38 @@ std::vector<SizeRange> V4L2VideoDevice::enumSizes(V4L2PixelFormat pixelFormat)
}
/**
+ * \brief Get the selection rectangle for \a target
+ * \param[in] target The selection target defined by the V4L2_SEL_TGT_* flags
+ * \param[out] rect The selection rectangle to retrieve
+ *
+ * \todo Define a V4L2SelectionTarget enum for the selection target
+ *
+ * \return 0 on success or a negative error code otherwise
+ */
+int V4L2VideoDevice::getSelection(unsigned int target, Rectangle *rect)
+{
+ struct v4l2_selection sel = {};
+
+ sel.type = bufferType_;
+ sel.target = target;
+ sel.flags = 0;
+
+ int ret = ioctl(VIDIOC_G_SELECTION, &sel);
+ if (ret < 0) {
+ LOG(V4L2, Error) << "Unable to get rectangle " << target
+ << ": " << strerror(-ret);
+ return ret;
+ }
+
+ rect->x = sel.r.left;
+ rect->y = sel.r.top;
+ rect->width = sel.r.width;
+ rect->height = sel.r.height;
+
+ return 0;
+}
+
+/**
* \brief Set a selection rectangle \a rect for \a target
* \param[in] target The selection target defined by the V4L2_SEL_TGT_* flags
* \param[inout] rect The selection rectangle to be applied