utils: tuning: Add requirements file and update readme

Add a requirements file to ease the installation and use of the tuning
scripts. Document that in the readme. No debian packages are provided as
rawpy is not packaged as deb. So pip has to be used anyways.

Also add pyyaml which was missing in the dependencies.

Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>

utils/tuning/README.rst

@@ -1,11 +1,20 @@
 .. SPDX-License-Identifier: CC-BY-SA-4.0
 
-.. TODO: Write an overview of libtuning
+libcamera tuning tools
+======================
 
-Dependencies
-------------
+.. Note:: The tuning tools are still very much work in progress. If in doubt,
+    please ask on the mailing list.
+
+.. todo::
+    Write documentation
+
+Installation of dependencies
+----------------------------
+
+::
+    # Using a venv
+    python3 -m venv venv
+    . ./venv/bin/activate
+    pip3 install -r requirements.txt
 
-- numpy
-- opencv-python
-- py3exiv2
-- rawpy

utils/tuning/requirements.txt

@@ -0,0 +1,5 @@
+numpy
+opencv-python
+py3exiv2
+pyyaml
+rawpy