gstreamer/ext/opencv/gstopencvbasetrans.c
2010-09-08 17:15:50 -03:00

304 lines
9.8 KiB
C

/*
* GStreamer
* Copyright (C) 2010 Thiago Santos <thiago.sousa.santos@collabora.co.uk>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Alternatively, the contents of this file may be used under the
* GNU Lesser General Public License Version 2.1 (the "LGPL"), in
* which case the following provisions apply instead of the ones
* mentioned above:
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* TODO opencv can do scaling for some cases */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <gst/gst.h>
#include "gstopencvbasetrans.h"
#include "gstopencvutils.h"
GST_DEBUG_CATEGORY_STATIC (gst_opencv_base_transform_debug);
#define GST_CAT_DEFAULT gst_opencv_base_transform_debug
/* Filter signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
PROP_0
};
static GstElementClass *parent_class = NULL;
static void gst_opencv_base_transform_class_init (GstOpencvBaseTransformClass *
klass);
static void gst_opencv_base_transform_init (GstOpencvBaseTransform * trans,
GstOpencvBaseTransformClass * klass);
static void gst_opencv_base_transform_base_init (gpointer gclass);
static gboolean gst_opencv_base_transform_set_caps (GstBaseTransform * trans,
GstCaps * incaps, GstCaps * outcaps);
static GstFlowReturn gst_opencv_base_transform_transform_ip (GstBaseTransform *
trans, GstBuffer * buf);
static GstFlowReturn gst_opencv_base_transform_transform (GstBaseTransform *
trans, GstBuffer * inbuf, GstBuffer * outbuf);
static gboolean gst_opencv_base_transform_get_unit_size (GstBaseTransform *
trans, GstCaps * caps, guint * size);
static void gst_opencv_base_transform_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_opencv_base_transform_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
GType
gst_opencv_base_transform_get_type (void)
{
static volatile gsize opencv_base_transform_type = 0;
if (g_once_init_enter (&opencv_base_transform_type)) {
GType _type;
static const GTypeInfo opencv_base_transform_info = {
sizeof (GstOpencvBaseTransformClass),
(GBaseInitFunc) gst_opencv_base_transform_base_init,
NULL,
(GClassInitFunc) gst_opencv_base_transform_class_init,
NULL,
NULL,
sizeof (GstOpencvBaseTransform),
0,
(GInstanceInitFunc) gst_opencv_base_transform_init,
};
_type = g_type_register_static (GST_TYPE_BASE_TRANSFORM,
"GstOpencvBaseTransform", &opencv_base_transform_info,
G_TYPE_FLAG_ABSTRACT);
g_once_init_leave (&opencv_base_transform_type, _type);
}
return opencv_base_transform_type;
}
/* Clean up */
static void
gst_opencv_base_transform_finalize (GObject * obj)
{
GstOpencvBaseTransform *transform = GST_OPENCV_BASE_TRANSFORM (obj);
if (transform->cvImage)
cvReleaseImage (&transform->cvImage);
G_OBJECT_CLASS (parent_class)->finalize (obj);
}
/* GObject vmethod implementations */
static void
gst_opencv_base_transform_base_init (gpointer gclass)
{
}
static void
gst_opencv_base_transform_class_init (GstOpencvBaseTransformClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstBaseTransformClass *basetrans_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
basetrans_class = (GstBaseTransformClass *) klass;
parent_class = g_type_class_peek_parent (klass);
GST_DEBUG_CATEGORY_INIT (gst_opencv_base_transform_debug,
"opencvbasetransform", 0, "opencvbasetransform element");
gobject_class->finalize =
GST_DEBUG_FUNCPTR (gst_opencv_base_transform_finalize);
gobject_class->set_property = gst_opencv_base_transform_set_property;
gobject_class->get_property = gst_opencv_base_transform_get_property;
basetrans_class->transform = gst_opencv_base_transform_transform;
basetrans_class->transform_ip = gst_opencv_base_transform_transform_ip;
basetrans_class->set_caps = gst_opencv_base_transform_set_caps;
basetrans_class->get_unit_size = gst_opencv_base_transform_get_unit_size;
}
static void
gst_opencv_base_transform_init (GstOpencvBaseTransform * transform,
GstOpencvBaseTransformClass * bclass)
{
}
static GstFlowReturn
gst_opencv_base_transform_transform (GstBaseTransform * trans,
GstBuffer * inbuf, GstBuffer * outbuf)
{
GstOpencvBaseTransform *transform;
GstOpencvBaseTransformClass *fclass;
transform = GST_OPENCV_BASE_TRANSFORM (trans);
fclass = GST_OPENCV_BASE_TRANSFORM_GET_CLASS (transform);
g_return_val_if_fail (fclass->cv_trans_func != NULL, GST_FLOW_ERROR);
g_return_val_if_fail (transform->cvImage != NULL, GST_FLOW_ERROR);
g_return_val_if_fail (transform->out_cvImage != NULL, GST_FLOW_ERROR);
transform->cvImage->imageData = (char *) GST_BUFFER_DATA (inbuf);
transform->out_cvImage->imageData = (char *) GST_BUFFER_DATA (outbuf);
return fclass->cv_trans_func (transform, inbuf, transform->cvImage, outbuf,
transform->out_cvImage);
}
static GstFlowReturn
gst_opencv_base_transform_transform_ip (GstBaseTransform * trans,
GstBuffer * buffer)
{
GstOpencvBaseTransform *transform;
GstOpencvBaseTransformClass *fclass;
transform = GST_OPENCV_BASE_TRANSFORM (trans);
fclass = GST_OPENCV_BASE_TRANSFORM_GET_CLASS (transform);
g_return_val_if_fail (fclass->cv_trans_ip_func != NULL, GST_FLOW_ERROR);
g_return_val_if_fail (transform->cvImage != NULL, GST_FLOW_ERROR);
buffer = gst_buffer_make_writable (buffer);
transform->cvImage->imageData = (char *) GST_BUFFER_DATA (buffer);
/* FIXME how to release buffer? */
return fclass->cv_trans_ip_func (transform, buffer, transform->cvImage);
}
static gboolean
gst_opencv_base_transform_set_caps (GstBaseTransform * trans, GstCaps * incaps,
GstCaps * outcaps)
{
GstOpencvBaseTransform *transform = GST_OPENCV_BASE_TRANSFORM (trans);
gint in_width, in_height;
gint in_depth, in_channels;
gint out_width, out_height;
gint out_depth, out_channels;
GError *in_err = NULL;
GError *out_err = NULL;
if (!gst_opencv_parse_iplimage_params_from_caps (incaps, &in_width,
&in_height, &in_depth, &in_channels, &in_err)) {
GST_WARNING_OBJECT (transform, "Failed to parse input caps: %s",
in_err->message);
g_error_free (in_err);
return FALSE;
}
if (!gst_opencv_parse_iplimage_params_from_caps (outcaps, &out_width,
&out_height, &out_depth, &out_channels, &out_err)) {
GST_WARNING_OBJECT (transform, "Failed to parse output caps: %s",
out_err->message);
g_error_free (out_err);
return FALSE;
}
if (transform->cvImage) {
cvReleaseImage (&transform->cvImage);
}
if (transform->out_cvImage) {
cvReleaseImage (&transform->out_cvImage);
}
transform->cvImage =
cvCreateImageHeader (cvSize (in_width, in_height), in_depth, in_channels);
transform->out_cvImage =
cvCreateImageHeader (cvSize (out_width, out_height), out_depth,
out_channels);
gst_base_transform_set_in_place (GST_BASE_TRANSFORM (transform),
transform->in_place);
return TRUE;
}
static gboolean
gst_opencv_base_transform_get_unit_size (GstBaseTransform * trans,
GstCaps * caps, guint * size)
{
gint width, height;
gint bpp;
GstStructure *structure;
structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_int (structure, "width", &width) ||
!gst_structure_get_int (structure, "height", &height) ||
!gst_structure_get_int (structure, "bpp", &bpp)) {
return FALSE;
}
*size = width * height * bpp / 8;
return TRUE;
}
static void
gst_opencv_base_transform_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_opencv_base_transform_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
void
gst_opencv_base_transform_set_in_place (GstOpencvBaseTransform * transform,
gboolean ip)
{
transform->in_place = ip;
gst_base_transform_set_in_place (GST_BASE_TRANSFORM (transform), ip);
}