1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
From 20378daaef4f4adb36d879879d6ab6d007a82636 Mon Sep 17 00:00:00 2001
From: Rob Clark <rob@ti.com>
Date: Mon, 24 May 2010 16:49:20 -0500
Subject: [PATCH 4/5] Add GstEventCrop event
This event can be used to set cropping / region-of-interest to take effect
on the following buffer.
---
gst/gstevent.c | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
gst/gstevent.h | 11 +++++++++
gst/gstquark.c | 2 +-
gst/gstquark.h | 5 +++-
4 files changed, 79 insertions(+), 2 deletions(-)
diff --git a/gst/gstevent.c b/gst/gstevent.c
index 6d2cc8b..d04df79 100644
--- a/gst/gstevent.c
+++ b/gst/gstevent.c
@@ -116,6 +116,7 @@ static GstEventQuarks event_quarks[] = {
{GST_EVENT_TAG, "tag", 0},
{GST_EVENT_BUFFERSIZE, "buffersize", 0},
{GST_EVENT_SINK_MESSAGE, "sink-message", 0},
+ {GST_EVENT_CROP, "crop", 0},
{GST_EVENT_QOS, "qos", 0},
{GST_EVENT_SEEK, "seek", 0},
{GST_EVENT_NAVIGATION, "navigation", 0},
@@ -1231,3 +1232,65 @@ gst_event_parse_sink_message (GstEvent * event, GstMessage ** msg)
GST_MESSAGE (gst_value_dup_mini_object (gst_structure_id_get_value
(event->structure, GST_QUARK (MESSAGE))));
}
+
+/**
+ * gst_event_new_crop:
+ * @top: the new offset to top of sub-image
+ * @left: the new offset to left of sub-image
+ * @width: the new width
+ * @height: the new height
+ *
+ * Create a new crop event.
+ */
+GstEvent *
+gst_event_new_crop (gint top, gint left, gint width, gint height)
+{
+ GstEvent *event;
+ GstStructure *structure;
+
+ GST_CAT_INFO (GST_CAT_EVENT, "creating crop event: %d,%d %dx%d",
+ top, left, width, height);
+
+ structure = gst_structure_id_new (GST_QUARK (EVENT_CROP),
+ GST_QUARK (TOP), G_TYPE_INT, top,
+ GST_QUARK (LEFT), G_TYPE_INT, left,
+ GST_QUARK (WIDTH), G_TYPE_INT, width,
+ GST_QUARK (HEIGHT), G_TYPE_INT, height, NULL);
+ event = gst_event_new_custom (GST_EVENT_CROP, structure);
+
+ return event;
+}
+
+/**
+ * gst_event_parse_crop:
+ * @event: The event to query
+ * @top: A pointer to store top offset in
+ * @left: A pointer to store left offset in
+ * @width: A pointer to store width in
+ * @height: A pointer to store height in
+ *
+ * Parse the crop event.
+ */
+void
+gst_event_parse_crop (GstEvent * event, gint * top, gint * left,
+ gint * width, gint * height)
+{
+ const GstStructure *structure;
+
+ g_return_if_fail (GST_IS_EVENT (event));
+ g_return_if_fail (GST_EVENT_TYPE (event) == GST_EVENT_CROP);
+
+ structure = gst_event_get_structure (event);
+ if (top)
+ *top = g_value_get_int (gst_structure_id_get_value (structure,
+ GST_QUARK (TOP)));
+ if (left)
+ *left = g_value_get_int (gst_structure_id_get_value (structure,
+ GST_QUARK (LEFT)));
+ if (width)
+ *width = g_value_get_int (gst_structure_id_get_value (structure,
+ GST_QUARK (WIDTH)));
+ if (height)
+ *height = g_value_get_int (gst_structure_id_get_value (structure,
+ GST_QUARK (HEIGHT)));
+}
diff --git a/gst/gstevent.h b/gst/gstevent.h
index 9568514..ae08829 100644
--- a/gst/gstevent.h
+++ b/gst/gstevent.h
@@ -93,6 +93,10 @@ typedef enum {
* @GST_EVENT_SINK_MESSAGE: An event that sinks turn into a message. Used to
* send messages that should be emitted in sync with
* rendering.
+ * @GST_EVENT_CROP: An event that can set horizontal (pan/scan) and vertical
+ * (tilt/scan) offset and width/height within a larger
+ * image. This event precedes the buffer to which it
+ * applies.
* @GST_EVENT_QOS: A quality message. Used to indicate to upstream elements
* that the downstream elements are being starved of or
* flooded with data.
@@ -133,6 +137,7 @@ typedef enum {
GST_EVENT_TAG = GST_EVENT_MAKE_TYPE (7, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)),
GST_EVENT_BUFFERSIZE = GST_EVENT_MAKE_TYPE (8, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)),
GST_EVENT_SINK_MESSAGE = GST_EVENT_MAKE_TYPE (9, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)),
+ GST_EVENT_CROP = GST_EVENT_MAKE_TYPE (10, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)),
/* upstream events */
GST_EVENT_QOS = GST_EVENT_MAKE_TYPE (15, FLAG(UPSTREAM)),
GST_EVENT_SEEK = GST_EVENT_MAKE_TYPE (16, FLAG(UPSTREAM)),
@@ -484,6 +489,12 @@ GstEvent* gst_event_new_step (GstFormat format, guint64 amoun
void gst_event_parse_step (GstEvent *event, GstFormat *format, guint64 *amount,
gdouble *rate, gboolean *flush, gboolean *intermediate);
+/* crop event */
+GstEvent * gst_event_new_crop (gint top, gint left, gint width, gint height);
+void gst_event_parse_crop (GstEvent * event, gint * top, gint * left,
+ gint * width, gint * height);
+
+
G_END_DECLS
#endif /* __GST_EVENT_H__ */
diff --git a/gst/gstquark.c b/gst/gstquark.c
index 58badca..f8716cc 100644
--- a/gst/gstquark.c
+++ b/gst/gstquark.c
@@ -50,7 +50,7 @@ static const gchar *_quark_strings[] = {
"intermediate", "GstMessageStepStart", "active", "eos", "sink-message",
"message", "GstMessageQOS", "running-time", "stream-time", "jitter",
"quality", "processed", "dropped", "buffering-ranges", "GstQueryBuffers",
- "caps", "count", "width", "height"
+ "caps", "count", "width", "height", "GstEventCrop", "top", "left"
};
GQuark _priv_gst_quark_table[GST_QUARK_MAX];
diff --git a/gst/gstquark.h b/gst/gstquark.h
index f4c8e0f..6eeb77f 100644
--- a/gst/gstquark.h
+++ b/gst/gstquark.h
@@ -132,8 +132,11 @@ typedef enum _GstQuarkId
GST_QUARK_COUNT = 103,
GST_QUARK_WIDTH = 104,
GST_QUARK_HEIGHT = 105,
+ GST_QUARK_EVENT_CROP = 106,
+ GST_QUARK_TOP = 107,
+ GST_QUARK_LEFT = 108,
- GST_QUARK_MAX = 106
+ GST_QUARK_MAX = 109
} GstQuarkId;
extern GQuark _priv_gst_quark_table[GST_QUARK_MAX];
--
1.7.1
|
GitWeb