[libcamera-devel] [PATCH v6 11/12] apps: cam: Add option to set stream orientation

[Jacopo Mondi]

Add a '--orientation|-o' option to the cam test application to set
an orientation to the image stream.

Supported values are the ones obtained by applying flips to the camera
sensor:
- rot0: no rotation
- rot180: rotate 180 degrees
- flip: vertical flip
- mirror: horizontal flip

Signed-off-by: Jacopo Mondi <jacopo.mondi at ideasonboard.com>
Reviewed-by: David Plowman <david.plowman at raspberrypi.com>
---
 src/apps/cam/camera_session.cpp | 18 ++++++++++++++++++
 src/apps/cam/main.cpp           |  5 +++++
 src/apps/cam/main.h             |  1 +
 3 files changed, 24 insertions(+)

diff --git a/src/apps/cam/camera_session.cpp b/src/apps/cam/camera_session.cpp
index 066e397b5f47..8447f932dfc7 100644
--- a/src/apps/cam/camera_session.cpp
+++ b/src/apps/cam/camera_session.cpp
@@ -65,6 +65,24 @@ CameraSession::CameraSession(CameraManager *cm,
 		return;
 	}
 
+	if (options_.isSet(OptOrientation)) {
+		std::string orientOpt = options_[OptOrientation].toString();
+		static const std::map<std::string, libcamera::Orientation> orientations{
+			{ "rot0", libcamera::Orientation::Rotate0 },
+			{ "rot180", libcamera::Orientation::Rotate180 },
+			{ "mirror", libcamera::Orientation::Rotate0Mirror },
+			{ "flip", libcamera::Orientation::Rotate180Mirror },
+		};
+
+		auto orientation = orientations.find(orientOpt);
+		if (orientation == orientations.end()) {
+			std::cerr << "Invalid orientation " << orientOpt << std::endl;
+			return;
+		}
+
+		config->orientation = orientation->second;
+	}
+
 	/* Apply configuration if explicitly requested. */
 	if (StreamKeyValueParser::updateConfiguration(config.get(),
 						      options_[OptStream])) {
diff --git a/src/apps/cam/main.cpp b/src/apps/cam/main.cpp
index 5d8a57bc14e5..179cc3769b03 100644
--- a/src/apps/cam/main.cpp
+++ b/src/apps/cam/main.cpp
@@ -133,6 +133,11 @@ int CamApp::parseOptions(int argc, char *argv[])
 			 "Capture until interrupted by user or until <count> frames captured",
 			 "capture", ArgumentOptional, "count", false,
 			 OptCamera);
+
+	parser.addOption(OptOrientation, OptionString,
+			 "Desired image orientation (rot0, rot180, mirror, flip)",
+			 "orientation", ArgumentRequired, "orientation", false,
+			 OptCamera);
 #ifdef HAVE_KMS
 	parser.addOption(OptDisplay, OptionString,
 			 "Display viewfinder through DRM/KMS on specified connector",
diff --git a/src/apps/cam/main.h b/src/apps/cam/main.h
index 526aecece3f3..4aa959b32e13 100644
--- a/src/apps/cam/main.h
+++ b/src/apps/cam/main.h
@@ -17,6 +17,7 @@ enum {
 	OptList = 'l',
 	OptListProperties = 'p',
 	OptMonitor = 'm',
+	OptOrientation = 'o',
 	OptSDL = 'S',
 	OptStream = 's',
 	OptListControls = 256,
-- 
2.42.0