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gstreamer/gst/videocrop/gstvideocrop.c
Nicolas Dufresne 1ad8ebac44 videocrop: Add support for automatic cropping 
This change enable automatic cropping using -1 set to left, top, right or
bottom property. In the case both side are set to automatic cropping, the
croping will be done equally on both side (in the odd case, right and
bottom cropping will be 1 pixel more).

https://bugzilla.gnome.org/show_bug.cgi?id=687761
2012-11-07 11:20:24 +01:00

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/* GStreamer video frame cropping
* Copyright (C) 2006 Tim-Philipp Müller <tim centricular net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-videocrop
* @see_also: #GstVideoBox
*
* This element crops video frames, meaning it can remove parts of the
* picture on the left, right, top or bottom of the picture and output
* a smaller picture than the input picture, with the unwanted parts at the
* border removed.
*
* The videocrop element is similar to the videobox element, but its main
* goal is to support a multitude of formats as efficiently as possible.
* Unlike videbox, it cannot add borders to the picture and unlike videbox
* it will always output images in exactly the same format as the input image.
*
* If there is nothing to crop, the element will operate in pass-through mode.
*
* Note that no special efforts are made to handle chroma-subsampled formats
* in the case of odd-valued cropping and compensate for sub-unit chroma plane
* shifts for such formats in the case where the #GstVideoCrop:left or
* #GstVideoCrop:top property is set to an odd number. This doesn't matter for
* most use cases, but it might matter for yours.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch-1.0 -v videotestsrc ! videocrop top=42 left=1 right=4 bottom=0 ! ximagesink
* ]|
* </refsect2>
*/
/* TODO:
* - for packed formats, we could avoid memcpy() in case crop_left
* and crop_right are 0 and just create a sub-buffer of the input
* buffer
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/video/video.h>
#include "gstvideocrop.h"
#include "gstaspectratiocrop.h"
#include <string.h>
GST_DEBUG_CATEGORY_STATIC (videocrop_debug);
#define GST_CAT_DEFAULT videocrop_debug
enum
{
ARG_0,
ARG_LEFT,
ARG_RIGHT,
ARG_TOP,
ARG_BOTTOM
};
#define VIDEO_CROP_CAPS \
GST_VIDEO_CAPS_MAKE ("{ RGBx, xRGB, BGRx, xBGR, " \
"RGBA, ARGB, BGRA, ABGR, RGB, BGR, AYUV, YUY2, " \
"YVYU, UYVY, I420, RGB16, RGB15, GRAY8 }")
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (VIDEO_CROP_CAPS)
);
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (VIDEO_CROP_CAPS)
);
#define gst_video_crop_parent_class parent_class
G_DEFINE_TYPE (GstVideoCrop, gst_video_crop, GST_TYPE_VIDEO_FILTER);
static void gst_video_crop_finalize (GObject * object);
static void gst_video_crop_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_video_crop_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstCaps *gst_video_crop_transform_caps (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps, GstCaps * filter_caps);
static gboolean gst_video_crop_src_event (GstBaseTransform * trans,
GstEvent * event);
static gboolean gst_video_crop_set_info (GstVideoFilter * vfilter, GstCaps * in,
GstVideoInfo * in_info, GstCaps * out, GstVideoInfo * out_info);
static GstFlowReturn gst_video_crop_transform_frame (GstVideoFilter * vfilter,
GstVideoFrame * in_frame, GstVideoFrame * out_frame);
static gboolean
gst_video_crop_src_event (GstBaseTransform * trans, GstEvent * event)
{
GstEvent *new_event;
GstStructure *new_structure;
const GstStructure *structure;
const gchar *event_name;
double pointer_x;
double pointer_y;
GstVideoCrop *vcrop = GST_VIDEO_CROP (trans);
new_event = NULL;
GST_OBJECT_LOCK (vcrop);
if (GST_EVENT_TYPE (event) == GST_EVENT_NAVIGATION &&
(vcrop->crop_left != 0 || vcrop->crop_top != 0)) {
structure = gst_event_get_structure (event);
event_name = gst_structure_get_string (structure, "event");
if (event_name &&
(strcmp (event_name, "mouse-move") == 0 ||
strcmp (event_name, "mouse-button-press") == 0 ||
strcmp (event_name, "mouse-button-release") == 0)) {
if (gst_structure_get_double (structure, "pointer_x", &pointer_x) &&
gst_structure_get_double (structure, "pointer_y", &pointer_y)) {
new_structure = gst_structure_copy (structure);
gst_structure_set (new_structure,
"pointer_x", G_TYPE_DOUBLE, (double) (pointer_x + vcrop->crop_left),
"pointer_y", G_TYPE_DOUBLE, (double) (pointer_y + vcrop->crop_top),
NULL);
new_event = gst_event_new_navigation (new_structure);
gst_event_unref (event);
} else {
GST_WARNING_OBJECT (vcrop, "Failed to read navigation event");
}
}
}
GST_OBJECT_UNLOCK (vcrop);
return GST_BASE_TRANSFORM_CLASS (parent_class)->src_event (trans,
(new_event ? new_event : event));
}
static void
gst_video_crop_class_init (GstVideoCropClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *element_class;
GstBaseTransformClass *basetransform_class;
GstVideoFilterClass *vfilter_class;
gobject_class = (GObjectClass *) klass;
element_class = (GstElementClass *) klass;
basetransform_class = (GstBaseTransformClass *) klass;
vfilter_class = (GstVideoFilterClass *) klass;
gobject_class->finalize = gst_video_crop_finalize;
gobject_class->set_property = gst_video_crop_set_property;
gobject_class->get_property = gst_video_crop_get_property;
g_object_class_install_property (gobject_class, ARG_LEFT,
g_param_spec_int ("left", "Left",
"Pixels to crop at left (-1 to auto-crop)", -1, G_MAXINT, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, ARG_RIGHT,
g_param_spec_int ("right", "Right",
"Pixels to crop at right (-1 to auto-crop)", -1, G_MAXINT, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, ARG_TOP,
g_param_spec_int ("top", "Top",
"Pixels to crop at top (-1 to auto-crop)", -1, G_MAXINT, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, ARG_BOTTOM,
g_param_spec_int ("bottom", "Bottom",
"Pixels to crop at bottom (-1 to auto-crop)", -1, G_MAXINT, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_template));
gst_element_class_set_static_metadata (element_class, "Crop",
"Filter/Effect/Video",
"Crops video into a user-defined region",
"Tim-Philipp Müller <tim centricular net>");
basetransform_class->transform_caps =
GST_DEBUG_FUNCPTR (gst_video_crop_transform_caps);
basetransform_class->src_event = GST_DEBUG_FUNCPTR (gst_video_crop_src_event);
vfilter_class->set_info = GST_DEBUG_FUNCPTR (gst_video_crop_set_info);
vfilter_class->transform_frame =
GST_DEBUG_FUNCPTR (gst_video_crop_transform_frame);
}
static void
gst_video_crop_init (GstVideoCrop * vcrop)
{
vcrop->crop_right = 0;
vcrop->crop_left = 0;
vcrop->crop_top = 0;
vcrop->crop_bottom = 0;
g_mutex_init (&vcrop->lock);
}
static void
gst_video_crop_finalize (GObject * object)
{
GstVideoCrop *vcrop;
vcrop = GST_VIDEO_CROP (object);
g_mutex_clear (&vcrop->lock);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
#define ROUND_DOWN_2(n) ((n)&(~1))
static void
gst_video_crop_transform_packed_complex (GstVideoCrop * vcrop,
GstVideoFrame * in_frame, GstVideoFrame * out_frame)
{
guint8 *in_data, *out_data;
guint i, dx;
gint width, height;
gint in_stride;
gint out_stride;
width = GST_VIDEO_FRAME_WIDTH (out_frame);
height = GST_VIDEO_FRAME_HEIGHT (out_frame);
in_data = GST_VIDEO_FRAME_PLANE_DATA (in_frame, 0);
out_data = GST_VIDEO_FRAME_PLANE_DATA (out_frame, 0);
in_stride = GST_VIDEO_FRAME_PLANE_STRIDE (in_frame, 0);
out_stride = GST_VIDEO_FRAME_PLANE_STRIDE (out_frame, 0);
in_data += vcrop->crop_top * in_stride;
/* rounding down here so we end up at the start of a macro-pixel and not
* in the middle of one */
in_data += ROUND_DOWN_2 (vcrop->crop_left) *
GST_VIDEO_FRAME_COMP_PSTRIDE (in_frame, 0);
dx = width * GST_VIDEO_FRAME_COMP_PSTRIDE (out_frame, 0);
/* UYVY = 4:2:2 - [U0 Y0 V0 Y1] [U2 Y2 V2 Y3] [U4 Y4 V4 Y5]
* YUYV = 4:2:2 - [Y0 U0 Y1 V0] [Y2 U2 Y3 V2] [Y4 U4 Y5 V4] = YUY2 */
if ((vcrop->crop_left % 2) != 0) {
for (i = 0; i < height; ++i) {
gint j;
memcpy (out_data, in_data, dx);
/* move just the Y samples one pixel to the left, don't worry about
* chroma shift */
for (j = vcrop->macro_y_off; j < out_stride - 2; j += 2)
out_data[j] = in_data[j + 2];
in_data += in_stride;
out_data += out_stride;
}
} else {
for (i = 0; i < height; ++i) {
memcpy (out_data, in_data, dx);
in_data += in_stride;
out_data += out_stride;
}
}
}
static void
gst_video_crop_transform_packed_simple (GstVideoCrop * vcrop,
GstVideoFrame * in_frame, GstVideoFrame * out_frame)
{
guint8 *in_data, *out_data;
gint width, height;
guint i, dx;
gint in_stride, out_stride;
width = GST_VIDEO_FRAME_WIDTH (out_frame);
height = GST_VIDEO_FRAME_HEIGHT (out_frame);
in_data = GST_VIDEO_FRAME_PLANE_DATA (in_frame, 0);
out_data = GST_VIDEO_FRAME_PLANE_DATA (out_frame, 0);
in_stride = GST_VIDEO_FRAME_PLANE_STRIDE (in_frame, 0);
out_stride = GST_VIDEO_FRAME_PLANE_STRIDE (out_frame, 0);
in_data += vcrop->crop_top * in_stride;
in_data += vcrop->crop_left * GST_VIDEO_FRAME_COMP_PSTRIDE (in_frame, 0);
dx = width * GST_VIDEO_FRAME_COMP_PSTRIDE (out_frame, 0);
for (i = 0; i < height; ++i) {
memcpy (out_data, in_data, dx);
in_data += in_stride;
out_data += out_stride;
}
}
static void
gst_video_crop_transform_planar (GstVideoCrop * vcrop,
GstVideoFrame * in_frame, GstVideoFrame * out_frame)
{
gint width, height;
guint8 *y_out, *u_out, *v_out;
guint8 *y_in, *u_in, *v_in;
guint i, dx;
width = GST_VIDEO_FRAME_WIDTH (out_frame);
height = GST_VIDEO_FRAME_HEIGHT (out_frame);
/* Y plane */
y_in = GST_VIDEO_FRAME_PLANE_DATA (in_frame, 0);
y_out = GST_VIDEO_FRAME_PLANE_DATA (out_frame, 0);
y_in +=
(vcrop->crop_top * GST_VIDEO_FRAME_PLANE_STRIDE (in_frame,
0)) + vcrop->crop_left;
dx = width;
for (i = 0; i < height; ++i) {
memcpy (y_out, y_in, dx);
y_in += GST_VIDEO_FRAME_PLANE_STRIDE (in_frame, 0);
y_out += GST_VIDEO_FRAME_PLANE_STRIDE (out_frame, 0);
}
/* U + V planes */
u_in = GST_VIDEO_FRAME_PLANE_DATA (in_frame, 1);
u_out = GST_VIDEO_FRAME_PLANE_DATA (out_frame, 1);
u_in += (vcrop->crop_top / 2) * GST_VIDEO_FRAME_PLANE_STRIDE (in_frame, 1);
u_in += vcrop->crop_left / 2;
v_in = GST_VIDEO_FRAME_PLANE_DATA (in_frame, 2);
v_out = GST_VIDEO_FRAME_PLANE_DATA (out_frame, 2);
v_in += (vcrop->crop_top / 2) * GST_VIDEO_FRAME_PLANE_STRIDE (in_frame, 2);
v_in += vcrop->crop_left / 2;
dx = GST_ROUND_UP_2 (width) / 2;
for (i = 0; i < GST_ROUND_UP_2 (height) / 2; ++i) {
memcpy (u_out, u_in, dx);
memcpy (v_out, v_in, dx);
u_in += GST_VIDEO_FRAME_PLANE_STRIDE (in_frame, 1);
u_out += GST_VIDEO_FRAME_PLANE_STRIDE (out_frame, 1);
v_in += GST_VIDEO_FRAME_PLANE_STRIDE (in_frame, 2);
v_out += GST_VIDEO_FRAME_PLANE_STRIDE (out_frame, 2);
}
}
static GstFlowReturn
gst_video_crop_transform_frame (GstVideoFilter * vfilter,
GstVideoFrame * in_frame, GstVideoFrame * out_frame)
{
GstVideoCrop *vcrop = GST_VIDEO_CROP (vfilter);
g_mutex_lock (&vcrop->lock);
switch (vcrop->packing) {
case VIDEO_CROP_PIXEL_FORMAT_PACKED_SIMPLE:
gst_video_crop_transform_packed_simple (vcrop, in_frame, out_frame);
break;
case VIDEO_CROP_PIXEL_FORMAT_PACKED_COMPLEX:
gst_video_crop_transform_packed_complex (vcrop, in_frame, out_frame);
break;
case VIDEO_CROP_PIXEL_FORMAT_PLANAR:
gst_video_crop_transform_planar (vcrop, in_frame, out_frame);
break;
default:
g_assert_not_reached ();
}
g_mutex_unlock (&vcrop->lock);
return GST_FLOW_OK;
}
static gint
gst_video_crop_transform_dimension (gint val, gint delta)
{
gint64 new_val = (gint64) val + (gint64) delta;
new_val = CLAMP (new_val, 1, G_MAXINT);
return (gint) new_val;
}
static gboolean
gst_video_crop_transform_dimension_value (const GValue * src_val,
gint delta, GValue * dest_val, GstPadDirection direction, gboolean dynamic)
{
gboolean ret = TRUE;
if (G_VALUE_HOLDS_INT (src_val)) {
gint ival = g_value_get_int (src_val);
ival = gst_video_crop_transform_dimension (ival, delta);
if (dynamic) {
if (direction == GST_PAD_SRC) {
if (ival == G_MAXINT) {
g_value_init (dest_val, G_TYPE_INT);
g_value_set_int (dest_val, ival);
} else {
g_value_init (dest_val, GST_TYPE_INT_RANGE);
gst_value_set_int_range (dest_val, ival, G_MAXINT);
}
} else {
if (ival == 1) {
g_value_init (dest_val, G_TYPE_INT);
g_value_set_int (dest_val, ival);
} else {
g_value_init (dest_val, GST_TYPE_INT_RANGE);
gst_value_set_int_range (dest_val, 1, ival);
}
}
} else {
g_value_init (dest_val, G_TYPE_INT);
g_value_set_int (dest_val, ival);
}
} else if (GST_VALUE_HOLDS_INT_RANGE (src_val)) {
gint min = gst_value_get_int_range_min (src_val);
gint max = gst_value_get_int_range_max (src_val);
min = gst_video_crop_transform_dimension (min, delta);
max = gst_video_crop_transform_dimension (max, delta);
if (dynamic) {
if (direction == GST_PAD_SRC)
max = G_MAXINT;
else
min = 1;
}
if (min == max) {
g_value_init (dest_val, G_TYPE_INT);
g_value_set_int (dest_val, min);
} else {
g_value_init (dest_val, GST_TYPE_INT_RANGE);
gst_value_set_int_range (dest_val, min, max);
}
} else if (GST_VALUE_HOLDS_LIST (src_val)) {
gint i;
g_value_init (dest_val, GST_TYPE_LIST);
for (i = 0; i < gst_value_list_get_size (src_val); ++i) {
const GValue *list_val;
GValue newval = { 0, };
list_val = gst_value_list_get_value (src_val, i);
if (gst_video_crop_transform_dimension_value (list_val, delta, &newval,
direction, dynamic))
gst_value_list_append_value (dest_val, &newval);
g_value_unset (&newval);
}
if (gst_value_list_get_size (dest_val) == 0) {
g_value_unset (dest_val);
ret = FALSE;
}
} else {
ret = FALSE;
}
return ret;
}
/* TODO use filter_caps */
static GstCaps *
gst_video_crop_transform_caps (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps, GstCaps * filter_caps)
{
GstVideoCrop *vcrop;
GstCaps *other_caps;
gint dy, dx, i, left, right, bottom, top;
gboolean w_dynamic, h_dynamic;
vcrop = GST_VIDEO_CROP (trans);
GST_OBJECT_LOCK (vcrop);
GST_LOG_OBJECT (vcrop, "l=%d,r=%d,b=%d,t=%d",
vcrop->prop_left, vcrop->prop_right, vcrop->prop_bottom, vcrop->prop_top);
w_dynamic = (vcrop->prop_left == -1 || vcrop->prop_right == -1);
h_dynamic = (vcrop->prop_top == -1 || vcrop->prop_bottom == -1);
left = (vcrop->prop_left == -1) ? 0 : vcrop->prop_left;
right = (vcrop->prop_right == -1) ? 0 : vcrop->prop_right;
bottom = (vcrop->prop_bottom == -1) ? 0 : vcrop->prop_bottom;
top = (vcrop->prop_top == -1) ? 0 : vcrop->prop_top;
if (direction == GST_PAD_SRC) {
dx = left + right;
dy = top + bottom;
} else {
dx = 0 - (left + right);
dy = 0 - (top + bottom);
}
GST_OBJECT_UNLOCK (vcrop);
GST_LOG_OBJECT (vcrop, "transforming caps %" GST_PTR_FORMAT, caps);
other_caps = gst_caps_new_empty ();
for (i = 0; i < gst_caps_get_size (caps); ++i) {
const GValue *v;
GstStructure *structure, *new_structure;
GValue w_val = { 0, }, h_val = {
0,};
structure = gst_caps_get_structure (caps, i);
v = gst_structure_get_value (structure, "width");
if (!gst_video_crop_transform_dimension_value (v, dx, &w_val, direction,
w_dynamic)) {
GST_WARNING_OBJECT (vcrop, "could not tranform width value with dx=%d"
", caps structure=%" GST_PTR_FORMAT, dx, structure);
continue;
}
v = gst_structure_get_value (structure, "height");
if (!gst_video_crop_transform_dimension_value (v, dy, &h_val, direction,
h_dynamic)) {
g_value_unset (&w_val);
GST_WARNING_OBJECT (vcrop, "could not tranform height value with dy=%d"
", caps structure=%" GST_PTR_FORMAT, dy, structure);
continue;
}
new_structure = gst_structure_copy (structure);
gst_structure_set_value (new_structure, "width", &w_val);
gst_structure_set_value (new_structure, "height", &h_val);
g_value_unset (&w_val);
g_value_unset (&h_val);
GST_LOG_OBJECT (vcrop, "transformed structure %2d: %" GST_PTR_FORMAT
" => %" GST_PTR_FORMAT, i, structure, new_structure);
gst_caps_append_structure (other_caps, new_structure);
}
if (!gst_caps_is_empty (other_caps) && filter_caps) {
GstCaps *tmp = gst_caps_intersect_full (filter_caps, other_caps,
GST_CAPS_INTERSECT_FIRST);
gst_caps_replace (&other_caps, tmp);
gst_caps_unref (tmp);
}
return other_caps;
}
static gboolean
gst_video_crop_set_info (GstVideoFilter * vfilter, GstCaps * in,
GstVideoInfo * in_info, GstCaps * out, GstVideoInfo * out_info)
{
GstVideoCrop *crop = GST_VIDEO_CROP (vfilter);
int dx, dy;
crop->crop_left = crop->prop_left;
crop->crop_right = crop->prop_right;
crop->crop_top = crop->prop_top;
crop->crop_bottom = crop->prop_bottom;
dx = GST_VIDEO_INFO_WIDTH (in_info) - GST_VIDEO_INFO_WIDTH (out_info);
dy = GST_VIDEO_INFO_HEIGHT (in_info) - GST_VIDEO_INFO_HEIGHT (out_info);
if (crop->prop_left == -1 && crop->prop_right == -1) {
crop->crop_left = dx / 2;
crop->crop_right = dx / 2 + (dx & 1);
} else if (crop->prop_left == -1) {
if (G_UNLIKELY (crop->prop_right > dx))
goto cropping_too_much;
crop->crop_left = dx - crop->prop_right;
} else if (crop->prop_right == -1) {
if (G_UNLIKELY (crop->prop_left > dx))
goto cropping_too_much;
crop->crop_right = dx - crop->prop_left;
}
if (crop->prop_top == -1 && crop->prop_bottom == -1) {
crop->crop_top = dy / 2;
crop->crop_bottom = dy / 2 + (dy & 1);
} else if (crop->prop_top == -1) {
if (G_UNLIKELY (crop->prop_bottom > dy))
goto cropping_too_much;
crop->crop_top = dy - crop->prop_bottom;
} else if (crop->prop_bottom == -1) {
if (G_UNLIKELY (crop->prop_top > dy))
goto cropping_too_much;
crop->crop_bottom = dy - crop->prop_top;
}
if (G_UNLIKELY ((crop->crop_left + crop->crop_right) >=
GST_VIDEO_INFO_WIDTH (in_info)
|| (crop->crop_top + crop->crop_bottom) >=
GST_VIDEO_INFO_HEIGHT (in_info)))
goto cropping_too_much;
GST_LOG_OBJECT (crop, "incaps = %" GST_PTR_FORMAT ", outcaps = %"
GST_PTR_FORMAT, in, out);
if ((crop->crop_left | crop->crop_right | crop->crop_top | crop->
crop_bottom) == 0) {
GST_LOG_OBJECT (crop, "we are using passthrough");
gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (crop), TRUE);
} else {
GST_LOG_OBJECT (crop, "we are not using passthrough");
gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (crop), FALSE);
}
if (GST_VIDEO_INFO_IS_RGB (in_info)
|| GST_VIDEO_INFO_IS_GRAY (in_info)) {
crop->packing = VIDEO_CROP_PIXEL_FORMAT_PACKED_SIMPLE;
} else {
switch (GST_VIDEO_INFO_FORMAT (in_info)) {
case GST_VIDEO_FORMAT_AYUV:
crop->packing = VIDEO_CROP_PIXEL_FORMAT_PACKED_SIMPLE;
break;
case GST_VIDEO_FORMAT_YVYU:
case GST_VIDEO_FORMAT_YUY2:
case GST_VIDEO_FORMAT_UYVY:
crop->packing = VIDEO_CROP_PIXEL_FORMAT_PACKED_COMPLEX;
if (GST_VIDEO_INFO_FORMAT (in_info) == GST_VIDEO_FORMAT_UYVY) {
/* UYVY = 4:2:2 - [U0 Y0 V0 Y1] [U2 Y2 V2 Y3] [U4 Y4 V4 Y5] */
crop->macro_y_off = 1;
} else {
/* YUYV = 4:2:2 - [Y0 U0 Y1 V0] [Y2 U2 Y3 V2] [Y4 U4 Y5 V4] = YUY2 */
crop->macro_y_off = 0;
}
break;
case GST_VIDEO_FORMAT_GRAY8:
crop->packing = VIDEO_CROP_PIXEL_FORMAT_PACKED_SIMPLE;
break;
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
crop->packing = VIDEO_CROP_PIXEL_FORMAT_PLANAR;
break;
default:
goto unknown_format;
}
}
return TRUE;
/* ERROR */
cropping_too_much:
{
GST_WARNING_OBJECT (crop, "we are cropping too much");
return FALSE;
}
unknown_format:
{
GST_WARNING_OBJECT (crop, "Unsupported format");
return FALSE;
}
}
static void
gst_video_crop_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstVideoCrop *video_crop;
video_crop = GST_VIDEO_CROP (object);
/* don't modify while we are transforming */
g_mutex_lock (&video_crop->lock);
/* protect with the object lock so that we can read them */
GST_OBJECT_LOCK (video_crop);
switch (prop_id) {
case ARG_LEFT:
video_crop->prop_left = g_value_get_int (value);
break;
case ARG_RIGHT:
video_crop->prop_right = g_value_get_int (value);
break;
case ARG_TOP:
video_crop->prop_top = g_value_get_int (value);
break;
case ARG_BOTTOM:
video_crop->prop_bottom = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_LOG_OBJECT (video_crop, "l=%d,r=%d,b=%d,t=%d",
video_crop->crop_left, video_crop->crop_right, video_crop->crop_bottom,
video_crop->crop_top);
GST_OBJECT_UNLOCK (video_crop);
gst_base_transform_reconfigure_src (GST_BASE_TRANSFORM (video_crop));
g_mutex_unlock (&video_crop->lock);
}
static void
gst_video_crop_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstVideoCrop *video_crop;
video_crop = GST_VIDEO_CROP (object);
GST_OBJECT_LOCK (video_crop);
switch (prop_id) {
case ARG_LEFT:
g_value_set_int (value, video_crop->prop_left);
break;
case ARG_RIGHT:
g_value_set_int (value, video_crop->prop_right);
break;
case ARG_TOP:
g_value_set_int (value, video_crop->prop_top);
break;
case ARG_BOTTOM:
g_value_set_int (value, video_crop->prop_bottom);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_OBJECT_UNLOCK (video_crop);
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (videocrop_debug, "videocrop", 0, "videocrop");
if (gst_element_register (plugin, "videocrop", GST_RANK_NONE,
GST_TYPE_VIDEO_CROP)
&& gst_element_register (plugin, "aspectratiocrop", GST_RANK_NONE,
GST_TYPE_ASPECT_RATIO_CROP))
return TRUE;
return FALSE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
videocrop,
"Crops video into a user-defined region",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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