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557 lines
16 KiB
C
557 lines
16 KiB
C
/* GStreamer GdkPixbuf-based image decoder
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* Copyright (C) 1999-2001 Erik Walthinsen <omega@cse.ogi.edu>
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* Copyright (C) 2003 David A. Schleef <ds@schleef.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst.h>
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#include <gst/video/video.h>
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include <string.h>
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#include "gstgdkpixbuf.h"
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#include "gstgdkpixbufsink.h"
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#include "pixbufscale.h"
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GST_DEBUG_CATEGORY_STATIC (gst_gdk_pixbuf_debug);
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#define GST_CAT_DEFAULT gst_gdk_pixbuf_debug
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enum
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{
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ARG_0,
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ARG_SILENT /* FIXME 0.11: remove */
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};
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static GstStaticPadTemplate gst_gdk_pixbuf_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("image/png; "
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/* "image/jpeg; " disabled because we can't handle MJPEG */
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"image/gif; "
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"image/x-icon; "
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"application/x-navi-animation; "
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"image/x-cmu-raster; "
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"image/x-sun-raster; "
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"image/x-pixmap; "
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"image/tiff; "
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"image/x-portable-anymap; "
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"image/x-portable-bitmap; "
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"image/x-portable-graymap; "
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"image/x-portable-pixmap; "
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"image/bmp; "
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"image/x-bmp; "
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"image/x-MS-bmp; "
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"image/vnd.wap.wbmp; " "image/x-bitmap; " "image/x-tga; "
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"image/x-pcx; image/svg; image/svg+xml")
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);
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static GstStaticPadTemplate gst_gdk_pixbuf_src_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_RGB "; " GST_VIDEO_CAPS_RGBA)
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);
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static void gst_gdk_pixbuf_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_gdk_pixbuf_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstStateChangeReturn
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gst_gdk_pixbuf_change_state (GstElement * element, GstStateChange transition);
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static GstFlowReturn gst_gdk_pixbuf_chain (GstPad * pad, GstBuffer * buffer);
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static gboolean gst_gdk_pixbuf_sink_event (GstPad * pad, GstEvent * event);
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#ifdef enable_typefind
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static void gst_gdk_pixbuf_type_find (GstTypeFind * tf, gpointer ignore);
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#endif
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GST_BOILERPLATE (GstGdkPixbuf, gst_gdk_pixbuf, GstElement, GST_TYPE_ELEMENT);
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static gboolean
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gst_gdk_pixbuf_sink_setcaps (GstPad * pad, GstCaps * caps)
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{
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GstGdkPixbuf *filter;
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const GValue *framerate;
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GstStructure *s;
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filter = GST_GDK_PIXBUF (GST_PAD_PARENT (pad));
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s = gst_caps_get_structure (caps, 0);
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if ((framerate = gst_structure_get_value (s, "framerate")) != NULL) {
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filter->framerate_numerator = gst_value_get_fraction_numerator (framerate);
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filter->framerate_denominator =
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gst_value_get_fraction_denominator (framerate);
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GST_DEBUG_OBJECT (filter, "got framerate of %d/%d fps => packetized mode",
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filter->framerate_numerator, filter->framerate_denominator);
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} else {
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filter->framerate_numerator = 0;
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filter->framerate_denominator = 1;
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GST_DEBUG_OBJECT (filter, "no framerate, assuming single image");
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}
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return TRUE;
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}
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static GstCaps *
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gst_gdk_pixbuf_get_capslist (void)
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{
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GSList *slist;
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GSList *slist0;
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GstCaps *capslist = NULL;
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GstCaps *return_caps = NULL;
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GstCaps *tmpl_caps;
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capslist = gst_caps_new_empty ();
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slist0 = gdk_pixbuf_get_formats ();
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for (slist = slist0; slist; slist = g_slist_next (slist)) {
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GdkPixbufFormat *pixbuf_format;
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char **mimetypes;
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char **mimetype;
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pixbuf_format = slist->data;
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mimetypes = gdk_pixbuf_format_get_mime_types (pixbuf_format);
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for (mimetype = mimetypes; *mimetype; mimetype++) {
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gst_caps_append_structure (capslist, gst_structure_new (*mimetype, NULL));
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}
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g_strfreev (mimetypes);
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}
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g_slist_free (slist0);
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tmpl_caps = gst_static_caps_get (&gst_gdk_pixbuf_sink_template.static_caps);
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return_caps = gst_caps_intersect (capslist, tmpl_caps);
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gst_caps_unref (tmpl_caps);
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gst_caps_unref (capslist);
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return return_caps;
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}
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static GstCaps *
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gst_gdk_pixbuf_sink_getcaps (GstPad * pad)
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{
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return gst_gdk_pixbuf_get_capslist ();
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}
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static void
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gst_gdk_pixbuf_base_init (gpointer g_class)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_gdk_pixbuf_src_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_gdk_pixbuf_sink_template));
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gst_element_class_set_details_simple (element_class,
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"GdkPixbuf image decoder", "Codec/Decoder/Image",
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"Decodes images in a video stream using GdkPixbuf",
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"David A. Schleef <ds@schleef.org>, Renato Filho <renato.filho@indt.org.br>");
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}
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/* initialize the plugin's class */
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static void
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gst_gdk_pixbuf_class_init (GstGdkPixbufClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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gobject_class->set_property = gst_gdk_pixbuf_set_property;
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gobject_class->get_property = gst_gdk_pixbuf_get_property;
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g_object_class_install_property (gobject_class, ARG_SILENT,
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g_param_spec_boolean ("silent", "Silent",
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"Produce verbose output ? (deprecated)", FALSE, G_PARAM_READWRITE));
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gstelement_class->change_state =
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GST_DEBUG_FUNCPTR (gst_gdk_pixbuf_change_state);
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}
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static void
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gst_gdk_pixbuf_init (GstGdkPixbuf * filter, GstGdkPixbufClass * klass)
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{
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filter->sinkpad =
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gst_pad_new_from_static_template (&gst_gdk_pixbuf_sink_template, "sink");
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gst_pad_set_setcaps_function (filter->sinkpad,
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GST_DEBUG_FUNCPTR (gst_gdk_pixbuf_sink_setcaps));
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gst_pad_set_getcaps_function (filter->sinkpad,
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GST_DEBUG_FUNCPTR (gst_gdk_pixbuf_sink_getcaps));
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gst_pad_set_chain_function (filter->sinkpad,
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GST_DEBUG_FUNCPTR (gst_gdk_pixbuf_chain));
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gst_pad_set_event_function (filter->sinkpad,
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GST_DEBUG_FUNCPTR (gst_gdk_pixbuf_sink_event));
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gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);
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filter->srcpad =
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gst_pad_new_from_static_template (&gst_gdk_pixbuf_src_template, "src");
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gst_pad_use_fixed_caps (filter->srcpad);
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gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);
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filter->last_timestamp = GST_CLOCK_TIME_NONE;
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filter->pixbuf_loader = NULL;
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}
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static GstFlowReturn
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gst_gdk_pixbuf_flush (GstGdkPixbuf * filter)
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{
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GstBuffer *outbuf;
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GdkPixbuf *pixbuf;
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int y;
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guint8 *out_pix;
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guint8 *in_pix;
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int in_rowstride;
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GstFlowReturn ret;
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GstCaps *caps = NULL;
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gint n_channels;
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pixbuf = gdk_pixbuf_loader_get_pixbuf (filter->pixbuf_loader);
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if (pixbuf == NULL)
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goto no_pixbuf;
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if (filter->image_size == 0) {
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filter->width = gdk_pixbuf_get_width (pixbuf);
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filter->height = gdk_pixbuf_get_height (pixbuf);
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filter->rowstride = gdk_pixbuf_get_rowstride (pixbuf);
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filter->image_size = filter->rowstride * filter->height;
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n_channels = gdk_pixbuf_get_n_channels (pixbuf);
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switch (n_channels) {
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case 3:
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caps = gst_caps_from_string (GST_VIDEO_CAPS_RGB);
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break;
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case 4:
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caps = gst_caps_from_string (GST_VIDEO_CAPS_RGBA);
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break;
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default:
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goto channels_not_supported;
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}
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gst_caps_set_simple (caps,
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"width", G_TYPE_INT, filter->width,
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"height", G_TYPE_INT, filter->height,
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"framerate", GST_TYPE_FRACTION, filter->framerate_numerator,
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filter->framerate_denominator, NULL);
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GST_DEBUG ("Set size to %dx%d", filter->width, filter->height);
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gst_pad_set_caps (filter->srcpad, caps);
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gst_caps_unref (caps);
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}
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ret = gst_pad_alloc_buffer_and_set_caps (filter->srcpad,
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GST_BUFFER_OFFSET_NONE,
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filter->image_size, GST_PAD_CAPS (filter->srcpad), &outbuf);
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if (ret != GST_FLOW_OK)
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goto no_buffer;
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GST_BUFFER_TIMESTAMP (outbuf) = filter->last_timestamp;
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GST_BUFFER_DURATION (outbuf) = GST_CLOCK_TIME_NONE;
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in_pix = gdk_pixbuf_get_pixels (pixbuf);
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in_rowstride = gdk_pixbuf_get_rowstride (pixbuf);
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out_pix = GST_BUFFER_DATA (outbuf);
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/* FIXME, last line might not have rowstride pixels */
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for (y = 0; y < filter->height; y++) {
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memcpy (out_pix, in_pix, filter->rowstride);
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in_pix += in_rowstride;
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out_pix += filter->rowstride;
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}
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GST_DEBUG ("pushing... %d bytes", GST_BUFFER_SIZE (outbuf));
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ret = gst_pad_push (filter->srcpad, outbuf);
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if (ret != GST_FLOW_OK)
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GST_DEBUG_OBJECT (filter, "flow: %s", gst_flow_get_name (ret));
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return ret;
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/* ERRORS */
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no_pixbuf:
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{
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GST_ELEMENT_ERROR (filter, STREAM, DECODE, (NULL), ("error geting pixbuf"));
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return GST_FLOW_ERROR;
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}
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channels_not_supported:
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{
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GST_ELEMENT_ERROR (filter, STREAM, DECODE, (NULL),
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("%d channels not supported", n_channels));
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return GST_FLOW_ERROR;
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}
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no_buffer:
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{
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GST_DEBUG ("Failed to create outbuffer - %s", gst_flow_get_name (ret));
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return ret;
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}
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}
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static gboolean
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gst_gdk_pixbuf_sink_event (GstPad * pad, GstEvent * event)
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{
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GstFlowReturn res = GST_FLOW_OK;
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gboolean ret = TRUE;
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GstGdkPixbuf *pixbuf;
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pixbuf = GST_GDK_PIXBUF (gst_pad_get_parent (pad));
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_EOS:
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if (pixbuf->pixbuf_loader != NULL) {
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gdk_pixbuf_loader_close (pixbuf->pixbuf_loader, NULL);
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res = gst_gdk_pixbuf_flush (pixbuf);
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g_object_unref (G_OBJECT (pixbuf->pixbuf_loader));
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pixbuf->pixbuf_loader = NULL;
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/* as long as we don't have flow returns for event functions we need
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* to post an error here, or the application might never know that
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* things failed */
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if (res != GST_FLOW_OK && res != GST_FLOW_WRONG_STATE) {
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GST_ELEMENT_ERROR (pixbuf, STREAM, FAILED, (NULL),
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("Flow: %s", gst_flow_get_name (res)));
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}
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}
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break;
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case GST_EVENT_NEWSEGMENT:
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case GST_EVENT_FLUSH_STOP:
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if (pixbuf->pixbuf_loader != NULL) {
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gdk_pixbuf_loader_close (pixbuf->pixbuf_loader, NULL);
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g_object_unref (G_OBJECT (pixbuf->pixbuf_loader));
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pixbuf->pixbuf_loader = NULL;
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}
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break;
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default:
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break;
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}
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if (res == GST_FLOW_OK) {
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ret = gst_pad_event_default (pad, event);
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} else {
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ret = FALSE;
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}
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gst_object_unref (pixbuf);
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return ret;
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}
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static GstFlowReturn
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gst_gdk_pixbuf_chain (GstPad * pad, GstBuffer * buf)
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{
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GstGdkPixbuf *filter;
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GstFlowReturn ret = GST_FLOW_OK;
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GError *error = NULL;
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GstClockTime timestamp;
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guint8 *data;
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guint size;
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filter = GST_GDK_PIXBUF (gst_pad_get_parent (pad));
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timestamp = GST_BUFFER_TIMESTAMP (buf);
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if (GST_CLOCK_TIME_IS_VALID (timestamp))
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filter->last_timestamp = timestamp;
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GST_LOG_OBJECT (filter, "buffer with ts: %" GST_TIME_FORMAT,
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GST_TIME_ARGS (timestamp));
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if (filter->pixbuf_loader == NULL)
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filter->pixbuf_loader = gdk_pixbuf_loader_new ();
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data = GST_BUFFER_DATA (buf);
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size = GST_BUFFER_SIZE (buf);
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GST_LOG_OBJECT (filter, "Writing buffer size %d", size);
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if (!gdk_pixbuf_loader_write (filter->pixbuf_loader, data, size, &error))
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goto error;
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/* packetised mode? */
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if (filter->framerate_numerator != 0) {
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gdk_pixbuf_loader_close (filter->pixbuf_loader, NULL);
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ret = gst_gdk_pixbuf_flush (filter);
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g_object_unref (filter->pixbuf_loader);
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filter->pixbuf_loader = NULL;
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}
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gst_buffer_unref (buf);
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gst_object_unref (filter);
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return ret;
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/* ERRORS */
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error:
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{
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GST_ELEMENT_ERROR (filter, STREAM, DECODE, (NULL),
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("gdk_pixbuf_loader_write error: %s", error->message));
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g_error_free (error);
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gst_buffer_unref (buf);
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gst_object_unref (filter);
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return GST_FLOW_ERROR;
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}
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}
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static void
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gst_gdk_pixbuf_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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switch (prop_id) {
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case ARG_SILENT:
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/* filter->silent = g_value_get_boolean (value); */
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_gdk_pixbuf_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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switch (prop_id) {
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case ARG_SILENT:
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/* g_value_set_boolean (value, filter->silent); */
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static GstStateChangeReturn
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gst_gdk_pixbuf_change_state (GstElement * element, GstStateChange transition)
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{
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GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
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GstGdkPixbuf *dec = GST_GDK_PIXBUF (element);
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switch (transition) {
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case GST_STATE_CHANGE_READY_TO_PAUSED:
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/* default to single image mode, setcaps function might not be called */
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dec->framerate_numerator = 0;
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dec->framerate_denominator = 1;
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break;
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default:
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break;
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}
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ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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if (ret == GST_STATE_CHANGE_FAILURE)
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return ret;
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switch (transition) {
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case GST_STATE_CHANGE_PAUSED_TO_READY:
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dec->framerate_numerator = 0;
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dec->framerate_denominator = 0;
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break;
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default:
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break;
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}
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return ret;
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}
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#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_MARGINAL,
|
|
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
|
|
|
|
if (!gst_element_register (plugin, "gdkpixbufsink", GST_RANK_NONE,
|
|
GST_TYPE_GDK_PIXBUF_SINK))
|
|
return FALSE;
|
|
|
|
if (!pixbufscale_init (plugin))
|
|
return FALSE;
|
|
|
|
/* 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",
|
|
"GdkPixbuf-based image decoder, scaler and sink",
|
|
plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
|