putting in apoc's png encoder, needs some cleanup

Original commit message from CVS:
putting in apoc's png encoder, needs some cleanup

1 files changed, 117 insertions, 0 deletions

diff --git a/ext/libpng/gstpng.c b/ext/libpng/gstpng.c
new file mode 100644
index 00000000..61dfe0b2
--- /dev/null
+++ b/ext/libpng/gstpng.c
@@ -0,0 +1,117 @@
+/* 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.
+ *
+ */
+
+#include <string.h>
+#include <gst/gst.h>
+#include "gstpng.h"
+
+
+struct _elements_entry {
+  gchar *name;
+  GType (*type) (void);
+  GstElementDetails *details;
+  gboolean (*factoryinit) (GstElementFactory *factory);
+};
+
+static struct _elements_entry _elements[] = {
+  { "pngenc",  	gst_pngenc_get_type, 		&gst_pngenc_details, 		NULL },
+  { NULL, 0 },
+};
+
+
+GstPadTemplate* 
+gst_png_src_factory (void)
+{
+  static GstPadTemplate *templ = NULL;
+  if (!templ) {
+    templ = GST_PAD_TEMPLATE_NEW ( 
+  		"src",
+  		GST_PAD_SRC,
+  		GST_PAD_ALWAYS,
+  		GST_CAPS_NEW (
+  		  "png_src",
+  		  "video/raw",
+		  NULL
+		)
+  	     );
+  }
+  return templ;
+}
+
+GstPadTemplate* 
+gst_png_sink_factory (void)
+{
+  static GstPadTemplate *templ = NULL;
+  if (!templ) {
+    templ = GST_PAD_TEMPLATE_NEW ( 
+  		"sink",
+  		GST_PAD_SINK,
+  		GST_PAD_ALWAYS,
+  		GST_CAPS_NEW (
+  		  "png_sink",
+  		  "video/raw",
+  		    "format",         GST_PROPS_FOURCC (GST_STR_FOURCC ("RGB ")),
+  		    "bpp",            GST_PROPS_INT (24),
+		    "red_mask",       GST_PROPS_INT (0xff0000),
+                    "green_mask",     GST_PROPS_INT (0xff00),
+                    "blue_mask",      GST_PROPS_INT (0xff),
+  		    "width",          GST_PROPS_INT_RANGE (16, 4096),
+  		    "height",         GST_PROPS_INT_RANGE (16, 4096)
+		)
+  	     );
+  }
+  return templ;
+}
+
+
+static gboolean
+plugin_init (GModule * module, GstPlugin * plugin)
+{
+  GstElementFactory *factory;
+  gint i = 0;
+
+  while (_elements[i].name) {
+    factory = gst_element_factory_new (_elements[i].name,
+                                      (_elements[i].type) (),
+                                       _elements[i].details);
+
+    if (!factory) {
+      g_warning ("gst_png_new failed for `%s'",
+                 _elements[i].name);
+      continue;
+    }
+    
+    gst_element_factory_add_pad_template (factory, gst_png_src_factory ());
+    gst_element_factory_add_pad_template (factory, gst_png_sink_factory ());
+
+    gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
+    if (_elements[i].factoryinit) {
+      _elements[i].factoryinit (factory);
+    }
+    i++;
+  }
+
+  return TRUE;
+}
+
+GstPluginDesc plugin_desc = {
+  GST_VERSION_MAJOR,
+  GST_VERSION_MINOR,
+  "png",
+  plugin_init
+};