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From d43a9444fc5f7655a8acd2978039667a04222ba0 Mon Sep 17 00:00:00 2001
From: Kiran Nataraju <knataraju@ti.com>
Date: Fri, 27 Aug 2010 09:00:57 +0200
Subject: [PATCH 02/11] v4l2sink: Add rotation support.
Signed-off-by: Kiran Nataraju <knataraju@ti.com>
Signed-off-by: Daniel Diaz <ddiaz@ti.com>
---
sys/v4l2/gstv4l2sink.c | 34 ++++++++++++++++++++++++++++++++++
sys/v4l2/gstv4l2sink.h | 1 +
2 files changed, 35 insertions(+), 0 deletions(-)
diff --git a/sys/v4l2/gstv4l2sink.c b/sys/v4l2/gstv4l2sink.c
index aa6785c..5abf915 100644
--- a/sys/v4l2/gstv4l2sink.c
+++ b/sys/v4l2/gstv4l2sink.c
@@ -72,6 +72,10 @@ GST_DEBUG_CATEGORY (v4l2sink_debug);
#define PROP_DEF_MIN_QUEUED_BUFS 1
#define DEFAULT_PROP_DEVICE "/dev/video1"
+#define MIN_ROTATION_ANGLE 0
+#define MAX_ROTATION_ANGLE 360
+#define DEFAULT_ROTATION_ANGLE 0
+
enum
{
PROP_0,
@@ -86,6 +90,7 @@ enum
PROP_CROP_LEFT,
PROP_CROP_WIDTH,
PROP_CROP_HEIGHT,
+ PROP_ROTATION,
};
@@ -220,6 +225,7 @@ static GstFlowReturn gst_v4l2sink_buffer_alloc (GstBaseSink * bsink,
guint64 offset, guint size, GstCaps * caps, GstBuffer ** buf);
static GstFlowReturn gst_v4l2sink_show_frame (GstBaseSink * bsink,
GstBuffer * buf);
+static void gst_v4l2sink_set_rotation (GstV4l2Sink * v4l2sink);
static void
gst_v4l2sink_base_init (gpointer g_class)
@@ -306,6 +312,11 @@ gst_v4l2sink_class_init (GstV4l2SinkClass * klass)
"The height of the video crop; default is equal to negotiated image height",
0, 0xffffffff, 0, G_PARAM_READWRITE));
+ g_object_class_install_property (gobject_class, PROP_ROTATION,
+ g_param_spec_int ("rotation", "Rotation angle",
+ "Rotation angle for the image", MIN_ROTATION_ANGLE,
+ MAX_ROTATION_ANGLE, DEFAULT_ROTATION_ANGLE, G_PARAM_READWRITE));
+
basesink_class->get_caps = GST_DEBUG_FUNCPTR (gst_v4l2sink_get_caps);
basesink_class->set_caps = GST_DEBUG_FUNCPTR (gst_v4l2sink_set_caps);
basesink_class->buffer_alloc = GST_DEBUG_FUNCPTR (gst_v4l2sink_buffer_alloc);
@@ -336,6 +347,7 @@ gst_v4l2sink_init (GstV4l2Sink * v4l2sink, GstV4l2SinkClass * klass)
v4l2sink->overlay_fields_set = 0;
v4l2sink->crop_fields_set = 0;
v4l2sink->state = 0;
+ v4l2sink->rotation = 0;
}
@@ -475,6 +487,20 @@ gst_v4l2sink_sync_crop_fields (GstV4l2Sink * v4l2sink)
}
}
+static void
+gst_v4l2sink_set_rotation (GstV4l2Sink * v4l2sink)
+{
+ if (GST_V4L2_IS_OPEN (v4l2sink->v4l2object)) {
+ struct v4l2_control control;
+ gint fd = v4l2sink->v4l2object->video_fd;
+
+ memset (&control, 0x00, sizeof (struct v4l2_control));
+ control.id = V4L2_CID_ROTATE;
+ control.value = v4l2sink->rotation;
+ g_return_if_fail (v4l2_ioctl (fd, VIDIOC_S_CTRL, &control) >= 0);
+ }
+}
+
static void
gst_v4l2sink_set_property (GObject * object,
@@ -531,6 +557,10 @@ gst_v4l2sink_set_property (GObject * object,
v4l2sink->crop_fields_set |= RECT_HEIGHT_SET;
gst_v4l2sink_sync_crop_fields (v4l2sink);
break;
+ case PROP_ROTATION:
+ v4l2sink->rotation = g_value_get_int (value);
+ gst_v4l2sink_set_rotation (v4l2sink);
+ break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@@ -578,6 +608,9 @@ gst_v4l2sink_get_property (GObject * object,
case PROP_CROP_HEIGHT:
g_value_set_uint (value, v4l2sink->crop.height);
break;
+ case PROP_ROTATION:
+ g_value_set_int (value, v4l2sink->rotation);
+ break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@@ -600,6 +633,7 @@ gst_v4l2sink_change_state (GstElement * element, GstStateChange transition)
/* open the device */
if (!gst_v4l2_object_start (v4l2sink->v4l2object))
return GST_STATE_CHANGE_FAILURE;
+ gst_v4l2sink_set_rotation (v4l2sink);
break;
default:
break;
diff --git a/sys/v4l2/gstv4l2sink.h b/sys/v4l2/gstv4l2sink.h
index 8fe8222..1239621 100644
--- a/sys/v4l2/gstv4l2sink.h
+++ b/sys/v4l2/gstv4l2sink.h
@@ -75,6 +75,7 @@ struct _GstV4l2Sink {
guint8 overlay_fields_set, crop_fields_set;
guint8 state;
+ gint rotation;
};
struct _GstV4l2SinkClass {
--
1.7.1
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