gstreamer/ext/libmng/gstmngenc.c

250 lines
6.3 KiB
C
Raw Normal View History

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* Filter:
* Copyright (C) 2000 Donald A. Graft
*
* 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.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <gst/gst.h>
#include "gstmngenc.h"
#include <gst/video/video.h>
#define MAX_HEIGHT 4096
GstElementDetails gst_mngenc_details = {
"MNG encoder",
"Codec/Encoder/Image",
"Encode a video frame to an .mng video",
"Wim Taymans <wim@fluendo.com>",
};
/* Filter signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
#define DEFAULT_SNAPSHOT TRUE
enum
{
ARG_0,
ARG_SNAPSHOT,
ARG_NEWMEDIA
};
static void gst_mngenc_base_init (gpointer g_class);
static void gst_mngenc_class_init (GstMngEncClass * klass);
static void gst_mngenc_init (GstMngEnc * mngenc);
static void gst_mngenc_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_mngenc_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static void gst_mngenc_chain (GstPad * pad, GstData * _data);
GstPadTemplate *mngenc_src_template, *mngenc_sink_template;
static GstElementClass *parent_class = NULL;
GType
gst_mngenc_get_type (void)
{
static GType mngenc_type = 0;
if (!mngenc_type) {
static const GTypeInfo mngenc_info = {
sizeof (GstMngEncClass),
gst_mngenc_base_init,
NULL,
(GClassInitFunc) gst_mngenc_class_init,
NULL,
NULL,
sizeof (GstMngEnc),
0,
(GInstanceInitFunc) gst_mngenc_init,
};
mngenc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstMngEnc",
&mngenc_info, 0);
}
return mngenc_type;
}
static GstCaps *
mng_caps_factory (void)
{
return gst_caps_new_simple ("video/x-mng",
"width", GST_TYPE_INT_RANGE, 16, 4096,
"height", GST_TYPE_INT_RANGE, 16, 4096,
"framerate", GST_TYPE_DOUBLE_RANGE, 0.0, G_MAXDOUBLE, NULL);
}
static GstCaps *
raw_caps_factory (void)
{
return gst_caps_from_string (GST_VIDEO_CAPS_RGB);
}
static void
gst_mngenc_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
GstCaps *raw_caps, *mng_caps;
raw_caps = raw_caps_factory ();
mng_caps = mng_caps_factory ();
mngenc_sink_template = gst_pad_template_new ("sink", GST_PAD_SINK,
GST_PAD_ALWAYS, raw_caps);
mngenc_src_template = gst_pad_template_new ("src", GST_PAD_SRC,
GST_PAD_ALWAYS, mng_caps);
gst_element_class_add_pad_template (element_class, mngenc_sink_template);
gst_element_class_add_pad_template (element_class, mngenc_src_template);
gst_element_class_set_details (element_class, &gst_mngenc_details);
}
static void
gst_mngenc_class_init (GstMngEncClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
g_object_class_install_property (gobject_class, ARG_SNAPSHOT,
g_param_spec_boolean ("snapshot", "Snapshot",
"Send EOS after encoding a frame, useful for snapshots",
DEFAULT_SNAPSHOT, (GParamFlags) G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, ARG_NEWMEDIA,
g_param_spec_boolean ("newmedia", "newmedia",
"Send new media discontinuity after encoding each frame",
FALSE, (GParamFlags) G_PARAM_READWRITE));
gstelement_class->get_property = gst_mngenc_get_property;
gstelement_class->set_property = gst_mngenc_set_property;
}
static GstPadLinkReturn
gst_mngenc_sinklink (GstPad * pad, const GstCaps * caps)
{
GstMngEnc *mngenc;
gdouble fps;
GstStructure *structure;
mngenc = GST_MNGENC (gst_pad_get_parent (pad));
structure = gst_caps_get_structure (caps, 0);
gst_structure_get_int (structure, "width", &mngenc->width);
gst_structure_get_int (structure, "height", &mngenc->height);
gst_structure_get_double (structure, "framerate", &fps);
gst_structure_get_int (structure, "bpp", &mngenc->bpp);
caps = gst_caps_new_simple ("video/x-mng",
"framerate", G_TYPE_DOUBLE, fps,
"width", G_TYPE_INT, mngenc->width,
"height", G_TYPE_INT, mngenc->height, NULL);
return gst_pad_try_set_caps (mngenc->srcpad, caps);
}
static void
gst_mngenc_init (GstMngEnc * mngenc)
{
mngenc->sinkpad = gst_pad_new_from_template (mngenc_sink_template, "sink");
gst_element_add_pad (GST_ELEMENT (mngenc), mngenc->sinkpad);
mngenc->srcpad = gst_pad_new ("src", GST_PAD_SRC);
gst_element_add_pad (GST_ELEMENT (mngenc), mngenc->srcpad);
gst_pad_set_chain_function (mngenc->sinkpad, gst_mngenc_chain);
gst_pad_set_link_function (mngenc->sinkpad, gst_mngenc_sinklink);
mngenc->snapshot = DEFAULT_SNAPSHOT;
mngenc->newmedia = FALSE;
}
static void
gst_mngenc_chain (GstPad * pad, GstData * _data)
{
GstBuffer *buf = GST_BUFFER (_data);
GstMngEnc *mngenc;
mngenc = GST_MNGENC (gst_pad_get_parent (pad));
/* FIXME, do something here */
gst_buffer_unref (buf);
}
static void
gst_mngenc_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstMngEnc *mngenc;
mngenc = GST_MNGENC (object);
switch (prop_id) {
case ARG_SNAPSHOT:
g_value_set_boolean (value, mngenc->snapshot);
break;
case ARG_NEWMEDIA:
g_value_set_boolean (value, mngenc->newmedia);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_mngenc_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstMngEnc *mngenc;
mngenc = GST_MNGENC (object);
switch (prop_id) {
case ARG_SNAPSHOT:
mngenc->snapshot = g_value_get_boolean (value);
break;
case ARG_NEWMEDIA:
mngenc->newmedia = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}