gstreamer/ext/gdk_pixbuf/gstgdkpixbuf.c

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/*
* gstgdkpixbuf.c
* GStreamer
* Copyright (C) 1999-2001 Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) 2003 David A. Schleef <ds@schleef.org>
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gst/video/video.h>
#include <string.h>
#include "gstgdkpixbuf.h"
GST_DEBUG_CATEGORY_STATIC (gst_gdk_pixbuf_debug);
#define GST_CAT_DEFAULT gst_gdk_pixbuf_debug
static GstElementDetails plugin_details = {
"GdkPixbuf image decoder",
"Codec/Decoder/Image",
"Decodes images in a video stream using GdkPixbuf",
"David A. Schleef <ds@schleef.org>",
};
/* Filter signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_SILENT
};
static GstStaticPadTemplate gst_gdk_pixbuf_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("image/png; "
"image/jpeg; "
"image/gif; "
"image/x-icon; "
"application/x-navi-animation; "
"image/x-cmu-raster; "
"image/x-sun-raster; "
"image/x-pixmap; "
"image/tiff; "
"image/x-portable-anymap; "
"image/x-portable-bitmap; "
"image/x-portable-graymap; "
"image/x-portable-pixmap; "
"image/bmp; "
"image/x-bmp; "
"image/x-MS-bmp; "
"image/vnd.wap.wbmp; " "image/x-bitmap; " "image/x-tga")
);
static GstStaticPadTemplate gst_gdk_pixbuf_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_RGB)
);
static void gst_gdk_pixbuf_base_init (gpointer g_class);
static void gst_gdk_pixbuf_class_init (GstGdkPixbufClass * klass);
static void gst_gdk_pixbuf_init (GstGdkPixbuf * filter);
static void gst_gdk_pixbuf_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_gdk_pixbuf_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_gdk_pixbuf_chain (GstPad * pad, GstData * _data);
#ifdef enable_typefind
static void gst_gdk_pixbuf_type_find (GstTypeFind * tf, gpointer ignore);
#endif
static GstElementClass *parent_class = NULL;
static GstPadLinkReturn
gst_gdk_pixbuf_sink_link (GstPad * pad, const GstCaps * caps)
{
GstGdkPixbuf *filter;
filter = GST_GDK_PIXBUF (gst_pad_get_parent (pad));
g_return_val_if_fail (filter != NULL, GST_PAD_LINK_REFUSED);
g_return_val_if_fail (GST_IS_GDK_PIXBUF (filter), GST_PAD_LINK_REFUSED);
filter->framerate = 1.0;
gst_structure_get_double (gst_caps_get_structure (caps, 0), "framerate",
&filter->framerate);
return GST_PAD_LINK_OK;
}
#if GDK_PIXBUF_MAJOR == 2 && GDK_PIXBUF_MINOR < 2
/* gdk-pixbuf prior to 2.2 didn't have gdk_pixbuf_get_formats().
* These are just the formats that gdk-pixbuf is known to support.
* But maybe not -- it may have been compiled without an external
* library. */
static GstCaps *
gst_gdk_pixbuf_get_capslist (void)
{
return gst_caps_copy (gst_static_caps_get (&gst_gdk_pixbuf_sink_template.
static_caps));
}
#else
static GstCaps *
gst_gdk_pixbuf_get_capslist (void)
{
GSList *slist;
GSList *slist0;
GdkPixbufFormat *pixbuf_format;
char **mimetypes;
char **mimetype;
GstCaps *capslist = NULL;
capslist = gst_caps_new_empty ();
slist0 = gdk_pixbuf_get_formats ();
for (slist = slist0; slist; slist = g_slist_next (slist)) {
pixbuf_format = slist->data;
mimetypes = gdk_pixbuf_format_get_mime_types (pixbuf_format);
for (mimetype = mimetypes; *mimetype; mimetype++) {
gst_caps_append_structure (capslist, gst_structure_new (*mimetype, NULL));
}
g_free (mimetypes);
}
g_slist_free (slist0);
return capslist;
}
#endif
static GstCaps *
gst_gdk_pixbuf_sink_getcaps (GstPad * pad)
{
GstGdkPixbuf *filter;
filter = GST_GDK_PIXBUF (gst_pad_get_parent (pad));
g_return_val_if_fail (filter != NULL, NULL);
g_return_val_if_fail (GST_IS_GDK_PIXBUF (filter), NULL);
return gst_gdk_pixbuf_get_capslist ();
}
GType
gst_gdk_pixbuf_get_type (void)
{
static GType plugin_type = 0;
if (!plugin_type) {
static const GTypeInfo plugin_info = {
sizeof (GstGdkPixbufClass),
gst_gdk_pixbuf_base_init,
NULL,
(GClassInitFunc) gst_gdk_pixbuf_class_init,
NULL,
NULL,
sizeof (GstGdkPixbuf),
0,
(GInstanceInitFunc) gst_gdk_pixbuf_init,
};
plugin_type = g_type_register_static (GST_TYPE_ELEMENT,
"GstGdkPixbuf", &plugin_info, 0);
}
return plugin_type;
}
static void
gst_gdk_pixbuf_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_gdk_pixbuf_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_gdk_pixbuf_sink_template));
gst_element_class_set_details (element_class, &plugin_details);
}
/* initialize the plugin's class */
static void
gst_gdk_pixbuf_class_init (GstGdkPixbufClass * 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_SILENT,
g_param_spec_boolean ("silent", "Silent", "Produce verbose output ?",
FALSE, G_PARAM_READWRITE));
gobject_class->set_property = gst_gdk_pixbuf_set_property;
gobject_class->get_property = gst_gdk_pixbuf_get_property;
}
static void
gst_gdk_pixbuf_init (GstGdkPixbuf * filter)
{
filter->sinkpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_gdk_pixbuf_sink_template), "sink");
gst_pad_set_link_function (filter->sinkpad, gst_gdk_pixbuf_sink_link);
gst_pad_set_getcaps_function (filter->sinkpad, gst_gdk_pixbuf_sink_getcaps);
filter->srcpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_gdk_pixbuf_src_template), "src");
gst_pad_use_explicit_caps (filter->srcpad);
gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);
gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);
gst_pad_set_chain_function (filter->sinkpad, gst_gdk_pixbuf_chain);
GST_FLAG_SET (GST_ELEMENT (filter), GST_ELEMENT_EVENT_AWARE);
}
static void
gst_gdk_pixbuf_chain (GstPad * pad, GstData * _data)
{
GstBuffer *buf = GST_BUFFER (_data);
GstGdkPixbuf *filter;
GError *error = NULL;
gboolean push_buffer = FALSE;
gboolean dump_buffer = FALSE;
gboolean got_eos = FALSE;
GST_DEBUG ("gst_gdk_pixbuf_chain");
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (buf != NULL);
filter = GST_GDK_PIXBUF (GST_OBJECT_PARENT (pad));
g_return_if_fail (GST_IS_GDK_PIXBUF (filter));
if (GST_IS_EVENT (_data)) {
GstEvent *event = GST_EVENT (buf);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_EOS:
push_buffer = TRUE;
got_eos = TRUE;
break;
case GST_EVENT_DISCONTINUOUS:
dump_buffer = TRUE;
break;
default:
gst_pad_event_default (pad, event);
return;
}
}
if (filter->last_timestamp != GST_BUFFER_TIMESTAMP (buf)) {
push_buffer = TRUE;
}
if (push_buffer) {
if (filter->pixbuf_loader != NULL) {
GstBuffer *outbuf;
GdkPixbuf *pixbuf;
GError *error = NULL;
if (!gdk_pixbuf_loader_close (filter->pixbuf_loader, &error)) {
GST_ELEMENT_ERROR (filter, LIBRARY, SHUTDOWN, (NULL), (error->message));
g_error_free (error);
return;
}
pixbuf = gdk_pixbuf_loader_get_pixbuf (filter->pixbuf_loader);
if (filter->image_size == 0) {
GstCaps *caps;
filter->width = gdk_pixbuf_get_width (pixbuf);
filter->height = gdk_pixbuf_get_height (pixbuf);
filter->rowstride = gdk_pixbuf_get_rowstride (pixbuf);
filter->image_size = filter->rowstride * filter->height;
caps = gst_caps_copy (gst_pad_get_pad_template_caps (filter->srcpad));
gst_caps_set_simple (caps,
"width", G_TYPE_INT, filter->width,
"height", G_TYPE_INT, filter->height,
"framerate", G_TYPE_DOUBLE, filter->framerate, NULL);
gst_pad_set_explicit_caps (filter->srcpad, caps);
}
outbuf = gst_pad_alloc_buffer (filter->srcpad, GST_BUFFER_OFFSET_NONE,
filter->image_size);
GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (buf);
memcpy (GST_BUFFER_DATA (outbuf), gdk_pixbuf_get_pixels (pixbuf),
filter->image_size);
gst_pad_push (filter->srcpad, GST_DATA (outbuf));
g_object_unref (G_OBJECT (filter->pixbuf_loader));
filter->pixbuf_loader = NULL;
dump_buffer = FALSE;
}
}
if (dump_buffer) {
if (filter->pixbuf_loader != NULL) {
gdk_pixbuf_loader_close (filter->pixbuf_loader, NULL);
g_object_unref (G_OBJECT (filter->pixbuf_loader));
filter->pixbuf_loader = NULL;
}
}
if (GST_IS_BUFFER (_data)) {
if (filter->pixbuf_loader == NULL) {
filter->pixbuf_loader = gdk_pixbuf_loader_new ();
filter->last_timestamp = GST_BUFFER_TIMESTAMP (buf);
}
gdk_pixbuf_loader_write (filter->pixbuf_loader, GST_BUFFER_DATA (buf),
GST_BUFFER_SIZE (buf), &error);
gst_buffer_unref (buf);
}
if (got_eos) {
gst_pad_event_default (pad, GST_EVENT (_data));
}
}
static void
gst_gdk_pixbuf_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstGdkPixbuf *filter;
g_return_if_fail (GST_IS_GDK_PIXBUF (object));
filter = GST_GDK_PIXBUF (object);
switch (prop_id) {
case ARG_SILENT:
//filter->silent = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_gdk_pixbuf_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstGdkPixbuf *filter;
g_return_if_fail (GST_IS_GDK_PIXBUF (object));
filter = GST_GDK_PIXBUF (object);
switch (prop_id) {
case ARG_SILENT:
//g_value_set_boolean (value, filter->silent);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
#define GST_GDK_PIXBUF_TYPE_FIND_SIZE 1024
#ifdef enable_typefind
static void
gst_gdk_pixbuf_type_find (GstTypeFind * tf, gpointer ignore)
{
guint8 *data;
GdkPixbufLoader *pixbuf_loader;
GdkPixbufFormat *format;
data = gst_type_find_peek (tf, 0, GST_GDK_PIXBUF_TYPE_FIND_SIZE);
if (data == NULL)
return;
GST_DEBUG ("creating new loader");
pixbuf_loader = gdk_pixbuf_loader_new ();
gdk_pixbuf_loader_write (pixbuf_loader, data, GST_GDK_PIXBUF_TYPE_FIND_SIZE,
NULL);
format = gdk_pixbuf_loader_get_format (pixbuf_loader);
if (format != NULL) {
GstCaps *caps;
gchar **p;
gchar **mlist = gdk_pixbuf_format_get_mime_types (format);
for (p = mlist; *p; ++p) {
GST_DEBUG ("suggesting mime type %s", *p);
caps = gst_caps_new_simple (*p, NULL);
gst_type_find_suggest (tf, GST_TYPE_FIND_MINIMUM, caps);
gst_caps_free (caps);
}
g_strfreev (mlist);
}
GST_DEBUG ("closing pixbuf loader, hope it doesn't hang ...");
/* librsvg 2.4.x has a bug where it triggers an endless loop in trying
to close a gzip that's not an svg; fixed upstream but no good way
to work around it */
gdk_pixbuf_loader_close (pixbuf_loader, NULL);
GST_DEBUG ("closed pixbuf loader");
g_object_unref (G_OBJECT (pixbuf_loader));
}
#endif
/* entry point to initialize the plug-in
* initialize the plug-in itself
* register the element factories and pad templates
* register the features
*/
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_gdk_pixbuf_debug, "gdkpixbuf", 0,
"gdk pixbuf loader");
if (!gst_element_register (plugin, "gdkpixbufdec", GST_RANK_NONE,
GST_TYPE_GDK_PIXBUF))
return FALSE;
#ifdef enable_typefind
gst_type_find_register (plugin, "image/*", GST_RANK_MARGINAL,
gst_gdk_pixbuf_type_find, NULL, GST_CAPS_ANY, NULL);
#endif
/* plugin initialisation succeeded */
return TRUE;
}
/* this is the structure that gst-register looks for
* so keep the name plugin_desc, or you cannot get your plug-in registered */
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"gdkpixbuf",
"GDK Pixbuf decoder", plugin_init, VERSION, "LGPL", GST_PACKAGE, GST_ORIGIN)