From 46c5a547a90ed5e8149b8d0b9ef71fa978de92d4 Mon Sep 17 00:00:00 2001
From: Devaev Maxim <mdevaev@gmail.com>
Date: Mon, 17 Aug 2020 03:49:29 +0300
Subject: [PATCH] options to flip image

---
 src/device.c  |  2 ++
 src/device.h  |  2 ++
 src/options.c | 10 ++++++++++
 3 files changed, 14 insertions(+)

diff --git a/src/device.c b/src/device.c
index 2ca848d..ce0dd42 100644
--- a/src/device.c
+++ b/src/device.c
@@ -736,6 +736,8 @@ static void _device_apply_controls(struct device_t *dev) {
 	CONTROL_MANUAL_CID	(								V4L2_CID_BACKLIGHT_COMPENSATION,	backlight_compensation);
 	CONTROL_AUTO_CID	(V4L2_CID_AUTO_WHITE_BALANCE,	V4L2_CID_WHITE_BALANCE_TEMPERATURE,	white_balance);
 	CONTROL_AUTO_CID	(V4L2_CID_AUTOGAIN,				V4L2_CID_GAIN,						gain);
+	CONTROL_MANUAL_CID	(								V4L2_CID_VFLIP,						flip_vertical);
+	CONTROL_MANUAL_CID	(								V4L2_CID_HFLIP,						flip_horizontal);
 
 #	undef CONTROL_AUTO_CID
 #	undef CONTROL_MANUAL_CID
diff --git a/src/device.h b/src/device.h
index bd0b4e2..6853d0d 100644
--- a/src/device.h
+++ b/src/device.h
@@ -90,6 +90,8 @@ struct controls_t {
 	struct control_t backlight_compensation;
 	struct control_t white_balance;
 	struct control_t gain;
+	struct control_t flip_vertical;
+	struct control_t flip_horizontal;
 };
 
 struct device_t {
diff --git a/src/options.c b/src/options.c
index 11f8141..389d6bf 100644
--- a/src/options.c
+++ b/src/options.c
@@ -92,6 +92,8 @@ enum _OPT_VALUES {
 	_O_BACKLIGHT_COMPENSATION,
 	_O_WHITE_BALANCE,
 	_O_GAIN,
+	_O_FLIP_VERTICAL,
+	_O_FLIP_HORIZONTAL,
 
 	_O_USER,
 	_O_PASSWD,
@@ -155,6 +157,8 @@ static const struct option _LONG_OPTS[] = {
 	{"backlight-compensation",	required_argument,	NULL,	_O_BACKLIGHT_COMPENSATION},
 	{"white-balance",			required_argument,	NULL,	_O_WHITE_BALANCE},
 	{"gain",					required_argument,	NULL,	_O_GAIN},
+	{"flip-vertical",			required_argument,	NULL,	_O_FLIP_VERTICAL},
+	{"flip-horizontal",			required_argument,	NULL,	_O_FLIP_HORIZONTAL},
 
 	{"host",					required_argument,	NULL,	_O_HOST},
 	{"port",					required_argument,	NULL,	_O_PORT},
@@ -360,6 +364,8 @@ int options_parse(struct options_t *options, struct device_t *dev, struct encode
 				OPT_CTL_DEFAULT_NOBREAK(backlight_compensation);
 				OPT_CTL_DEFAULT_NOBREAK(white_balance);
 				OPT_CTL_DEFAULT_NOBREAK(gain);
+				OPT_CTL_DEFAULT_NOBREAK(flip_vertical);
+				OPT_CTL_DEFAULT_NOBREAK(flip_horizontal);
 				break;
 			case _O_BRIGHTNESS:				OPT_CTL_AUTO(brightness);
 			case _O_CONTRAST:				OPT_CTL_MANUAL(contrast);
@@ -370,6 +376,8 @@ int options_parse(struct options_t *options, struct device_t *dev, struct encode
 			case _O_BACKLIGHT_COMPENSATION:	OPT_CTL_MANUAL(backlight_compensation);
 			case _O_WHITE_BALANCE:			OPT_CTL_AUTO(white_balance);
 			case _O_GAIN:					OPT_CTL_AUTO(gain);
+			case _O_FLIP_VERTICAL:			OPT_CTL_MANUAL(flip_vertical);
+			case _O_FLIP_HORIZONTAL:		OPT_CTL_MANUAL(flip_horizontal);
 
 			case _O_HOST:				OPT_SET(server->host, optarg);
 			case _O_PORT:				OPT_NUMBER("--port", server->port, 1, 65535, 0);
@@ -600,6 +608,8 @@ static void _help(struct device_t *dev, struct encoder_t *encoder, struct http_s
 	printf("    --backlight-compensation <N|default>  ─ Set backlight compensation. Default: no change.\n\n");
 	printf("    --white-balance <N|auto|default>  ───── Set white balance. Default: no change.\n\n");
 	printf("    --gain <N|auto|default>  ────────────── Set gain. Default: no change.\n\n");
+	printf("    --flip-vertical <1|0|default>  ──────── Set vertical flip. Default: no change.\n\n");
+	printf("    --flip-horizontal <1|0|default>  ────── Set horizontal flip. Default: no change.\n\n");
 	printf("    Hint: use v4l2-ctl --list-ctrls-menus to query available controls of the device.\n\n");
 	printf("HTTP server options:\n");
 	printf("════════════════════\n");