gstreamer/gst-libs/gst/gl/gstglupload.c

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/*
* GStreamer
* Copyright (C) 2012-2014 Matthew Waters <ystree00@gmail.com>
*
* 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
2012-11-08 11:53:56 +00:00
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include "gl.h"
#include "gstglupload.h"
#if GST_GL_HAVE_PLATFORM_EGL
#include "egl/gsteglimagememory.h"
#endif
/**
* SECTION:gstglupload
* @short_description: an object that uploads to GL textures
* @see_also: #GstGLDownload, #GstGLMemory
*
* #GstGLUpload is an object that uploads data from system memory into GL textures.
*
* A #GstGLUpload can be created with gst_gl_upload_new()
*/
#define USING_OPENGL(context) (gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL, 1, 0))
#define USING_OPENGL3(context) (gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL3, 3, 1))
#define USING_GLES(context) (gst_gl_context_check_gl_version (context, GST_GL_API_GLES, 1, 0))
#define USING_GLES2(context) (gst_gl_context_check_gl_version (context, GST_GL_API_GLES2, 2, 0))
#define USING_GLES3(context) (gst_gl_context_check_gl_version (context, GST_GL_API_GLES2, 3, 0))
GST_DEBUG_CATEGORY_STATIC (gst_gl_upload_debug);
#define GST_CAT_DEFAULT gst_gl_upload_debug
typedef struct _UploadMethod UploadMethod;
struct _GstGLUploadPrivate
{
GstVideoInfo in_info;
GstVideoInfo out_info;
GstCaps *in_caps;
GstCaps *out_caps;
GstGLColorConvert *convert;
GstBuffer *outbuf;
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const UploadMethod *method;
gpointer method_impl;
int method_i;
};
typedef enum
{
METHOD_FLAG_CAN_SHARE_CONTEXT = 1,
} GstGLUploadMethodFlags;
struct _UploadMethod
{
const gchar *name;
GstGLUploadMethodFlags flags;
gpointer (*new) (GstGLUpload * upload);
gboolean (*accept) (gpointer impl, GstBuffer * buffer, GstCaps * in_caps,
GstCaps * out_caps);
GstGLUploadReturn (*perform) (gpointer impl, GstBuffer * buffer,
GstBuffer ** outbuf);
void (*release) (gpointer impl, GstBuffer * buffer);
void (*free) (gpointer impl);
} _UploadMethod;
struct GLMemoryUpload
{
GstGLUpload *upload;
};
static gpointer
_gl_memory_upload_new (GstGLUpload * upload)
{
struct GLMemoryUpload *mem = g_new0 (struct GLMemoryUpload, 1);
mem->upload = upload;
return mem;
}
static gboolean
_gl_memory_upload_accept (gpointer impl, GstBuffer * buffer, GstCaps * in_caps,
GstCaps * out_caps)
{
struct GLMemoryUpload *upload = impl;
GstCapsFeatures *features, *gl_features;
gboolean ret = TRUE;
int i;
gl_features =
gst_caps_features_from_string (GST_CAPS_FEATURE_MEMORY_GL_MEMORY);
features = gst_caps_get_features (out_caps, 0);
if (!gst_caps_features_is_equal (features, gl_features))
ret = FALSE;
gst_caps_features_free (gl_features);
if (!ret)
return FALSE;
if (gst_buffer_n_memory (buffer) !=
GST_VIDEO_INFO_N_PLANES (&upload->upload->priv->in_info))
return FALSE;
for (i = 0; i < GST_VIDEO_INFO_N_PLANES (&upload->upload->priv->in_info); i++) {
GstMemory *mem = gst_buffer_peek_memory (buffer, i);
if (!gst_is_gl_memory (mem))
return FALSE;
}
return TRUE;
}
static GstGLUploadReturn
_gl_memory_upload_perform (gpointer impl, GstBuffer * buffer,
GstBuffer ** outbuf)
{
struct GLMemoryUpload *upload = impl;
GstGLMemory *gl_mem;
int i;
for (i = 0; i < GST_VIDEO_INFO_N_PLANES (&upload->upload->priv->in_info); i++) {
GstMemory *mem = gst_buffer_peek_memory (buffer, i);
gl_mem = (GstGLMemory *) mem;
if (!gst_gl_context_can_share (upload->upload->context, gl_mem->context))
return GST_GL_UPLOAD_UNSHARED_GL_CONTEXT;
}
*outbuf = gst_buffer_ref (buffer);
return GST_GL_UPLOAD_DONE;
}
static void
_gl_memory_upload_release (gpointer impl, GstBuffer * buffer)
{
}
static void
_gl_memory_upload_free (gpointer impl)
{
g_free (impl);
}
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static const UploadMethod _gl_memory_upload = {
"GLMemory",
METHOD_FLAG_CAN_SHARE_CONTEXT,
&_gl_memory_upload_new,
&_gl_memory_upload_accept,
&_gl_memory_upload_perform,
&_gl_memory_upload_release,
&_gl_memory_upload_free
};
#if GST_GL_HAVE_PLATFORM_EGL
struct EGLImageUpload
{
GstGLUpload *upload;
};
static gpointer
_egl_image_upload_new (GstGLUpload * upload)
{
struct EGLImageUpload *image = g_new0 (struct EGLImageUpload, 1);
image->upload = upload;
return image;
}
static gboolean
_egl_image_upload_accept (gpointer impl, GstBuffer * buffer, GstCaps * in_caps,
GstCaps * out_caps)
{
struct EGLImageUpload *image = impl;
GstCapsFeatures *features, *gl_features;
gboolean ret = TRUE;
int i;
gl_features =
gst_caps_features_from_string (GST_CAPS_FEATURE_MEMORY_EGL_IMAGE);
features = gst_caps_get_features (in_caps, 0);
if (!gst_caps_features_is_equal (features, gl_features))
ret = FALSE;
gst_caps_features_free (gl_features);
gl_features =
gst_caps_features_from_string (GST_CAPS_FEATURE_MEMORY_GL_MEMORY);
features = gst_caps_get_features (out_caps, 0);
if (!gst_caps_features_is_equal (features, gl_features))
ret = FALSE;
gst_caps_features_free (gl_features);
if (!ret)
return FALSE;
if (gst_buffer_n_memory (buffer) !=
GST_VIDEO_INFO_N_PLANES (&image->upload->priv->in_info))
return FALSE;
for (i = 0; i < GST_VIDEO_INFO_N_PLANES (&image->upload->priv->in_info); i++) {
GstMemory *mem = gst_buffer_peek_memory (buffer, i);
if (!gst_is_egl_image_memory (mem))
return FALSE;
}
return TRUE;
}
static GstGLUploadReturn
_egl_image_upload_perform (gpointer impl, GstBuffer * buffer,
GstBuffer ** outbuf)
{
struct EGLImageUpload *image = impl;
guint i;
/* FIXME: buffer pool */
*outbuf = gst_buffer_new ();
gst_gl_memory_setup_buffer (image->upload->context,
&image->upload->priv->out_info, NULL, *outbuf);
for (i = 0; i < GST_VIDEO_INFO_N_PLANES (&image->upload->priv->in_info); i++) {
GstMemory *mem = gst_buffer_peek_memory (buffer, i);
GstGLMemory *out_gl_mem =
(GstGLMemory *) gst_buffer_peek_memory (*outbuf, i);
const GstGLFuncs *gl = NULL;
gl = GST_GL_CONTEXT (((GstEGLImageMemory *) mem)->context)->gl_vtable;
gl->ActiveTexture (GL_TEXTURE0 + i);
gl->BindTexture (GL_TEXTURE_2D, out_gl_mem->tex_id);
gl->EGLImageTargetTexture2D (GL_TEXTURE_2D,
gst_egl_image_memory_get_image (mem));
}
if (GST_IS_GL_BUFFER_POOL (buffer->pool))
gst_gl_buffer_pool_replace_last_buffer (GST_GL_BUFFER_POOL (buffer->pool),
buffer);
return GST_GL_UPLOAD_DONE;
}
static void
_egl_image_upload_release (gpointer impl, GstBuffer * buffer)
{
}
static void
_egl_image_upload_free (gpointer impl)
{
g_free (impl);
}
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static const UploadMethod _egl_image_upload = {
"EGLImage",
0,
&_egl_image_upload_new,
&_egl_image_upload_accept,
&_egl_image_upload_perform,
&_egl_image_upload_release,
&_egl_image_upload_free
};
#endif
struct GLUploadMeta
{
GstGLUpload *upload;
gboolean result;
GstVideoGLTextureUploadMeta *meta;
guint texture_ids[GST_VIDEO_MAX_PLANES];
};
static gpointer
_upload_meta_upload_new (GstGLUpload * upload)
{
struct GLUploadMeta *meta = g_new0 (struct GLUploadMeta, 1);
meta->upload = upload;
return meta;
}
static gboolean
_upload_meta_upload_accept (gpointer impl, GstBuffer * buffer,
GstCaps * in_caps, GstCaps * out_caps)
{
struct GLUploadMeta *upload = impl;
GstCapsFeatures *features, *gl_features;
GstVideoGLTextureUploadMeta *meta;
gboolean ret = TRUE;
features = gst_caps_get_features (in_caps, 0);
gl_features =
gst_caps_features_from_string
(GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META);
if (!gst_caps_features_is_equal (features, gl_features))
ret = FALSE;
gst_caps_features_free (gl_features);
if ((meta = gst_buffer_get_video_gl_texture_upload_meta (buffer)) == NULL)
return FALSE;
gl_features =
gst_caps_features_from_string (GST_CAPS_FEATURE_MEMORY_GL_MEMORY);
features = gst_caps_get_features (out_caps, 0);
if (!gst_caps_features_is_equal (features, gl_features))
ret = FALSE;
gst_caps_features_free (gl_features);
if (!ret)
return ret;
if (meta->texture_type[0] != GST_VIDEO_GL_TEXTURE_TYPE_RGBA) {
GST_FIXME_OBJECT (upload, "only single rgba texture supported");
return FALSE;
}
if (meta->texture_orientation !=
GST_VIDEO_GL_TEXTURE_ORIENTATION_X_NORMAL_Y_NORMAL) {
GST_FIXME_OBJECT (upload, "only x-normal, y-normal textures supported");
return FALSE;
}
return TRUE;
}
/*
* Uploads using gst_video_gl_texture_upload_meta_upload().
* i.e. consumer of GstVideoGLTextureUploadMeta
*/
static void
_do_upload_with_meta (GstGLContext * context, struct GLUploadMeta *upload)
{
if (!gst_video_gl_texture_upload_meta_upload (upload->meta,
upload->texture_ids)) {
upload->result = FALSE;
return;
}
upload->result = TRUE;
}
static GstGLUploadReturn
_upload_meta_upload_perform (gpointer impl, GstBuffer * buffer,
GstBuffer ** outbuf)
{
struct GLUploadMeta *upload = impl;
int i;
GST_LOG_OBJECT (upload, "Attempting upload with GstVideoGLTextureUploadMeta");
upload->meta = gst_buffer_get_video_gl_texture_upload_meta (buffer);
/* FIXME: buffer pool */
*outbuf = gst_buffer_new ();
gst_gl_memory_setup_buffer (upload->upload->context,
&upload->upload->priv->in_info, NULL, *outbuf);
for (i = 0; i < GST_VIDEO_MAX_PLANES; i++) {
guint tex_id = 0;
if (i < GST_VIDEO_INFO_N_PLANES (&upload->upload->priv->in_info)) {
GstMemory *mem = gst_buffer_peek_memory (*outbuf, i);
tex_id = ((GstGLMemory *) mem)->tex_id;
}
upload->texture_ids[i] = tex_id;
}
GST_LOG ("Uploading with GLTextureUploadMeta with textures %i,%i,%i,%i",
upload->texture_ids[0], upload->texture_ids[1], upload->texture_ids[2],
upload->texture_ids[3]);
gst_gl_context_thread_add (upload->upload->context,
(GstGLContextThreadFunc) _do_upload_with_meta, upload);
if (!upload->result)
return GST_GL_UPLOAD_ERROR;
return GST_GL_UPLOAD_DONE;
}
static void
_upload_meta_upload_release (gpointer impl, GstBuffer * buffer)
{
}
static void
_upload_meta_upload_free (gpointer impl)
{
struct GLUploadMeta *upload = impl;
gint i;
for (i = 0; i < GST_VIDEO_MAX_PLANES; i++) {
if (upload->texture_ids[i])
gst_gl_context_del_texture (upload->upload->context,
&upload->texture_ids[i]);
}
g_free (upload);
}
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static const UploadMethod _upload_meta_upload = {
"UploadMeta",
METHOD_FLAG_CAN_SHARE_CONTEXT,
&_upload_meta_upload_new,
&_upload_meta_upload_accept,
&_upload_meta_upload_perform,
&_upload_meta_upload_release,
&_upload_meta_upload_free
};
struct RawUpload
{
GstGLUpload *upload;
GstGLMemory *in_tex[GST_VIDEO_MAX_PLANES];
GstVideoFrame in_frame;
};
static gpointer
_raw_data_upload_new (GstGLUpload * upload)
{
struct RawUpload *raw = g_new0 (struct RawUpload, 1);
raw->upload = upload;
return raw;
}
static gboolean
_raw_data_upload_accept (gpointer impl, GstBuffer * buffer, GstCaps * in_caps,
GstCaps * out_caps)
{
struct RawUpload *raw = impl;
GstCapsFeatures *features, *gl_features;
gboolean ret = TRUE;
gl_features =
gst_caps_features_from_string (GST_CAPS_FEATURE_MEMORY_GL_MEMORY);
features = gst_caps_get_features (out_caps, 0);
if (!gst_caps_features_is_equal (features, gl_features))
ret = FALSE;
gst_caps_features_free (gl_features);
if (!ret)
return ret;
if (!gst_video_frame_map (&raw->in_frame, &raw->upload->priv->in_info, buffer,
GST_MAP_READ))
return FALSE;
raw->upload->priv->in_info = raw->in_frame.info;
return TRUE;
}
static GstGLUploadReturn
_raw_data_upload_perform (gpointer impl, GstBuffer * buffer,
GstBuffer ** outbuf)
{
struct RawUpload *raw = impl;
int i;
if (!raw->in_tex[0])
gst_gl_memory_setup_wrapped (raw->upload->context,
&raw->upload->priv->in_info, NULL, raw->in_frame.data, raw->in_tex);
for (i = 0; i < GST_VIDEO_MAX_PLANES; i++) {
if (raw->in_tex[i]) {
raw->in_tex[i]->data = raw->in_frame.data[i];
GST_GL_MEMORY_FLAG_SET (raw->in_tex[i], GST_GL_MEMORY_FLAG_NEED_UPLOAD);
}
}
*outbuf = gst_buffer_new ();
for (i = 0; i < GST_VIDEO_INFO_N_PLANES (&raw->upload->priv->in_info); i++) {
gst_buffer_append_memory (*outbuf,
gst_memory_ref ((GstMemory *) raw->in_tex[i]));
}
return GST_GL_UPLOAD_DONE;
}
static void
_raw_data_upload_release (gpointer impl, GstBuffer * buffer)
{
struct RawUpload *raw = impl;
gst_video_frame_unmap (&raw->in_frame);
}
static void
_raw_data_upload_free (gpointer impl)
{
struct RawUpload *raw = impl;
int i;
for (i = 0; i < GST_VIDEO_MAX_PLANES; i++) {
if (raw->in_tex[i])
gst_memory_unref ((GstMemory *) raw->in_tex[i]);
}
g_free (raw);
}
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static const UploadMethod _raw_data_upload = {
"Raw Data",
0,
&_raw_data_upload_new,
&_raw_data_upload_accept,
&_raw_data_upload_perform,
&_raw_data_upload_release,
&_raw_data_upload_free
};
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static const UploadMethod *upload_methods[] = { &_gl_memory_upload,
#if GST_GL_HAVE_PLATFORM_EGL
&_egl_image_upload,
#endif
&_upload_meta_upload, &_raw_data_upload
};
#define DEBUG_INIT \
GST_DEBUG_CATEGORY_INIT (gst_gl_upload_debug, "glupload", 0, "upload");
G_DEFINE_TYPE_WITH_CODE (GstGLUpload, gst_gl_upload, GST_TYPE_OBJECT,
DEBUG_INIT);
static void gst_gl_upload_finalize (GObject * object);
static void gst_gl_upload_release_buffer_unlocked (GstGLUpload * upload);
#define GST_GL_UPLOAD_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), \
GST_TYPE_GL_UPLOAD, GstGLUploadPrivate))
static void
gst_gl_upload_class_init (GstGLUploadClass * klass)
{
g_type_class_add_private (klass, sizeof (GstGLUploadPrivate));
G_OBJECT_CLASS (klass)->finalize = gst_gl_upload_finalize;
}
static void
gst_gl_upload_init (GstGLUpload * upload)
{
upload->priv = GST_GL_UPLOAD_GET_PRIVATE (upload);
}
/**
* gst_gl_upload_new:
* @context: a #GstGLContext
*
* Returns: a new #GstGLUpload object
*/
GstGLUpload *
gst_gl_upload_new (GstGLContext * context)
{
GstGLUpload *upload = g_object_new (GST_TYPE_GL_UPLOAD, NULL);
upload->context = gst_object_ref (context);
return upload;
}
static void
gst_gl_upload_finalize (GObject * object)
{
GstGLUpload *upload;
upload = GST_GL_UPLOAD (object);
gst_gl_upload_release_buffer_unlocked (upload);
if (upload->priv->method_impl)
upload->priv->method->free (upload->priv->method_impl);
upload->priv->method_i = 0;
if (upload->context) {
gst_object_unref (upload->context);
upload->context = NULL;
}
if (upload->priv->convert) {
gst_object_unref (upload->priv->convert);
upload->priv->convert = NULL;
}
if (upload->priv->in_caps) {
gst_caps_unref (upload->priv->in_caps);
upload->priv->in_caps = NULL;
}
if (upload->priv->out_caps) {
gst_caps_unref (upload->priv->out_caps);
upload->priv->out_caps = NULL;
}
G_OBJECT_CLASS (gst_gl_upload_parent_class)->finalize (object);
}
static gboolean
_gst_gl_upload_set_caps_unlocked (GstGLUpload * upload, GstCaps * in_caps,
GstCaps * out_caps)
{
g_return_val_if_fail (upload != NULL, FALSE);
g_return_val_if_fail (gst_caps_is_fixed (in_caps), FALSE);
if (upload->priv->in_caps && upload->priv->out_caps
&& gst_caps_is_equal (upload->priv->in_caps, in_caps)
&& gst_caps_is_equal (upload->priv->out_caps, out_caps))
return TRUE;
gst_caps_replace (&upload->priv->in_caps, in_caps);
gst_caps_replace (&upload->priv->out_caps, out_caps);
gst_video_info_from_caps (&upload->priv->in_info, in_caps);
gst_video_info_from_caps (&upload->priv->out_info, out_caps);
if (upload->priv->method_impl)
upload->priv->method->free (upload->priv->method_impl);
upload->priv->method_impl = NULL;
upload->priv->method_i = 0;
return TRUE;
}
/**
* gst_gl_upload_set_caps:
* @upload: a #GstGLUpload
* @in_caps: input #GstCaps
* @out_caps: output #GstCaps
*
* Initializes @upload with the information required for upload.
*
* Returns: whether @in_caps and @out_caps could be set on @upload
*/
gboolean
gst_gl_upload_set_caps (GstGLUpload * upload, GstCaps * in_caps,
GstCaps * out_caps)
{
gboolean ret;
GST_OBJECT_LOCK (upload);
ret = _gst_gl_upload_set_caps_unlocked (upload, in_caps, out_caps);
GST_OBJECT_UNLOCK (upload);
return ret;
}
/**
* gst_gl_upload_get_caps:
* @upload: a #GstGLUpload
* @in_caps: (transfer full): (allow-none): (out): the input #GstCaps
* @ou_caps: (transfer full): (allow-none): (out): the output #GstCaps
*
* Returns: (transfer none): The #GstCaps set by gst_gl_upload_set_caps()
*/
void
gst_gl_upload_get_caps (GstGLUpload * upload, GstCaps ** in_caps,
GstCaps ** out_caps)
{
GST_OBJECT_LOCK (upload);
if (in_caps)
*in_caps =
upload->priv->in_caps ? gst_caps_ref (upload->priv->in_caps) : NULL;
if (out_caps)
*out_caps =
upload->priv->out_caps ? gst_caps_ref (upload->priv->out_caps) : NULL;
GST_OBJECT_UNLOCK (upload);
}
static void
gst_gl_upload_release_buffer_unlocked (GstGLUpload * upload)
{
if (upload->priv->outbuf && upload->priv->method_impl) {
upload->priv->method->release (upload->priv->method_impl,
upload->priv->outbuf);
gst_buffer_replace (&upload->priv->outbuf, NULL);
}
}
/**
* gst_gl_upload_release_buffer:
* @upload: a #GstGLUpload
*
* Releases any buffers currently referenced by @upload
*/
void
gst_gl_upload_release_buffer (GstGLUpload * upload)
{
g_return_if_fail (upload != NULL);
GST_OBJECT_LOCK (upload);
gst_gl_upload_release_buffer_unlocked (upload);
GST_OBJECT_UNLOCK (upload);
}
static gboolean
_upload_find_method (GstGLUpload * upload)
{
if (upload->priv->method_i >= G_N_ELEMENTS (upload_methods))
return FALSE;
if (upload->priv->method_impl)
upload->priv->method->free (upload->priv->method_impl);
upload->priv->method = upload_methods[upload->priv->method_i];
upload->priv->method_impl = upload->priv->method->new (upload);
GST_DEBUG_OBJECT (upload, "attempting upload with uploader %s",
upload->priv->method->name);
upload->priv->method_i++;
return TRUE;
}
/**
* gst_gl_upload_perform_with_buffer:
* @upload: a #GstGLUpload
* @buffer: a #GstBuffer
* @outbuf_ptr: (allow-none): resulting buffer
*
* Uploads @buffer to the texture given by @tex_id. @tex_id is valid
* until gst_gl_upload_release_buffer() is called.
*
* Returns: whether the upload was successful
*/
GstGLUploadReturn
gst_gl_upload_perform_with_buffer (GstGLUpload * upload, GstBuffer * buffer,
GstBuffer ** outbuf_ptr)
{
GstGLUploadReturn ret = GST_GL_UPLOAD_ERROR;
g_return_val_if_fail (GST_IS_GL_UPLOAD (upload), FALSE);
g_return_val_if_fail (GST_IS_BUFFER (buffer), FALSE);
GST_OBJECT_LOCK (upload);
gst_gl_upload_release_buffer_unlocked (upload);
#define NEXT_METHOD \
do { \
if (!_upload_find_method (upload)) { \
GST_OBJECT_UNLOCK (upload); \
return FALSE; \
} \
goto restart; \
} while (0)
if (!upload->priv->method_impl)
_upload_find_method (upload);
restart:
if (!upload->priv->method->accept (upload->priv->method_impl, buffer,
upload->priv->in_caps, upload->priv->out_caps))
NEXT_METHOD;
ret =
upload->priv->method->perform (upload->priv->method_impl, buffer,
&upload->priv->outbuf);
if (ret == GST_GL_UPLOAD_UNSHARED_GL_CONTEXT) {
upload->priv->method->free (upload->priv->method_impl);
upload->priv->method = &_raw_data_upload;
upload->priv->method_impl = upload->priv->method->new (upload);
goto restart;
} else if (ret == GST_GL_UPLOAD_DONE) {
/* we are done */
} else {
gst_gl_upload_release_buffer_unlocked (upload);
upload->priv->method->free (upload->priv->method_impl);
NEXT_METHOD;
}
if (outbuf_ptr)
*outbuf_ptr = gst_buffer_ref (upload->priv->outbuf);
GST_OBJECT_UNLOCK (upload);
return ret;
#undef NEXT_METHOD
}