From 73897e4f1125629566a7cef0ecbaf0015d22ec75 Mon Sep 17 00:00:00 2001
From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Date: Thu, 20 Mar 2014 00:15:42 +0100
Subject: live: Add crop support

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 live.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 47 insertions(+), 4 deletions(-)

diff --git a/live.c b/live.c
index d1785da..6d53b46 100644
--- a/live.c
+++ b/live.c
@@ -289,7 +289,8 @@ static struct omap3_isp_operations isp_ops = {
 };
 
 static int viewfinder_init(struct omap3_isp_device *isp,
-			   const struct v4l2_rect *rect)
+			   const struct v4l2_rect *rect,
+			   struct v4l2_rect *crop)
 {
 	struct v4l2_mbus_framefmt view_format;
 	struct v4l2_buffers_pool *pool;
@@ -300,7 +301,7 @@ static int viewfinder_init(struct omap3_isp_device *isp,
 	view_format.width = rect->width;
 	view_format.height = rect->height;
 
-	ret = omap3_isp_viewfinder_setup(isp, NULL, &view_format);
+	ret = omap3_isp_viewfinder_setup(isp, crop, &view_format);
 	if (ret < 0) {
 		printf("error: unable to setup viewfinder\n");
 		return ret;
@@ -761,11 +762,43 @@ static void sigint_handler(int signal __attribute__((__unused__)))
 	events_stop(&events);
 }
 
+static int parse_crop(const char *p, struct v4l2_rect *crop)
+{
+	char *end;
+
+	if (*p++ != '(')
+		return -EINVAL;
+
+	crop->left = strtoul(p, &end, 10);
+	if (*end != ',')
+		return -EINVAL;
+
+	p = end + 1;
+	crop->top = strtoul(p, &end, 10);
+	if (*end++ != ')')
+		return -EINVAL;
+	if (*end != '/')
+		return -EINVAL;
+
+	p = end + 1;
+	crop->width = strtoul(p, &end, 10);
+	if (*end != 'x')
+		return -EINVAL;
+
+	p = end + 1;
+	crop->height = strtoul(p, &end, 10);
+	if (*end != '\0')
+		return -EINVAL;
+
+	return 0;
+}
+
 static void usage(const char *argv0)
 {
 	printf("Usage: %s [options]\n", argv0);
 	printf("Supported options:\n");
 	printf("-b, --buffers n		Use n display buffers\n");
+	printf("-c, --crop (x,y)/wxh	Set the sensor crop rectangle\n");
 	printf("-h, --help		Show this help screen\n");
 	printf("-s, --skip n		Skip display of n frames out of n+1\n");
 	printf("    --aewb param=value	Set AEWB algorithm parameter 'param' to 'value'\n");
@@ -793,6 +826,7 @@ static void usage(const char *argv0)
 
 static struct option opts[] = {
 	{ "aewb", 1, 0, OPT_AEWB_PARAM },
+	{ "crop", 1, 0, 'c' },
 	{ "disable-aewb", 0, 0, OPT_AEWB_DISABLE },
 	{ "help", 0, 0, 'h' },
 	{ "saturation", 1, 0, OPT_SATURATION },
@@ -806,22 +840,31 @@ int main(int argc __attribute__((__unused__)), char *argv[] __attribute__((__unu
 	struct timespec start, end;
 	struct iq_params iq_params;
 	unsigned int buffers = 3;
+	struct v4l2_rect crop;
 	struct v4l2_rect rect;
 	int exit_code = EXIT_FAILURE;
 	const char *vo_devname;
 	unsigned int colorkey;
 	bool enable_aewb = true;
+	bool enable_crop = false;
 	float fps;
 	int ret;
 	int c;
 
 	iq_params_init(&iq_params);
 
-	while ((c = getopt_long(argc, argv, "b:hs:z", opts, NULL)) != -1) {
+	while ((c = getopt_long(argc, argv, "b:c:hs:z", opts, NULL)) != -1) {
 		switch (c) {
 		case 'b':
 			buffers = atoi(optarg);
 			break;
+		case 'c':
+			if (parse_crop(optarg, &crop)) {
+				printf("invalid crop rectangle %s.\n", optarg);
+				return 1;
+			}
+			enable_crop = true;
+			break;
 		case 'h':
 			usage(argv[0]);
 			return 0;
@@ -894,7 +937,7 @@ int main(int argc __attribute__((__unused__)), char *argv[] __attribute__((__unu
 		goto cleanup;
 	}
 
-	ret = viewfinder_init(isp, &rect);
+	ret = viewfinder_init(isp, &rect, enable_crop ? &crop : NULL);
 	if (ret < 0)
 		goto cleanup;
 
-- 
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