add initial version of gdkpixbuf loader for gtk that is capable of loading AVI and mpeg videos as GdkPixbufAnimation....

Original commit message from CVS:
add initial version of gdkpixbuf loader for gtk that is capable of loading AVI and mpeg videos as GdkPixbufAnimation. I'm not sure if such a thing would be useful or too much trouble, so I'll throw it at enough testers to figure it out ;) We might want to disable it by defualt though in the future. (Currently there is not even a configure switch implemented to disable it.)
This includes a fix to not use GError in gstgdkpixbuf's typefind function and to only return GST_TYPE_FIND_MINIMUM when doing typefinding via gdk as this breaks quite a bit with the GStreamer loader installed.

1 files changed, 109 insertions, 0 deletions

diff --git a/ext/gdk_pixbuf/gstgdkanimation.h b/ext/gdk_pixbuf/gstgdkanimation.h
new file mode 100644
index 00000000..de5ce053
--- /dev/null
+++ b/ext/gdk_pixbuf/gstgdkanimation.h
@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2003 Benjamin Otte <in7y118@public.uni-hamburg.de>
+ *
+ * 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.
+ */
+
+#ifndef __GST_LOADER_H__
+#define __GST_LOADER_H__
+
+#include <gst/gst.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gdk-pixbuf/gdk-pixbuf-animation.h>
+#include <gdk-pixbuf/gdk-pixbuf-io.h>
+#include <stdio.h>
+
+G_BEGIN_DECLS
+
+/* how many bytes we need to have available before we dare to start a new iteration */
+#define GST_GDK_BUFFER_SIZE 102400
+
+
+#define GST_TYPE_GDK_ANIMATION			(gst_gdk_animation_get_type())
+#define GST_GDK_ANIMATION(obj)			(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GDK_ANIMATION,GstGdkAnimation))
+#define GST_GDK_ANIMATION_CLASS(klass)		(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GDK_ANIMATION,GstGdkAnimation))
+#define GST_IS_GDK_ANIMATION(obj)		(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GDK_ANIMATION))
+#define GST_IS_GDK_ANIMATION_CLASS(obj)		(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GDK_ANIMATION))
+
+typedef struct _GstGdkAnimation      GstGdkAnimation;
+typedef struct _GstGdkAnimationClass GstGdkAnimationClass;
+
+typedef struct _GstGdkAnimationIter GstGdkAnimationIter;
+typedef struct _GstGdkAnimationIterClass GstGdkAnimationIterClass;
+
+struct _GstGdkAnimation
+{
+  GdkPixbufAnimation		parent;
+
+  /* name of temporary buffer file */
+  gchar *			temp_location;
+  /* file descriptor to temporary file or 0 if we're done writing */
+  int				temp_fd;
+  /* functions to notify the loader */
+
+
+  /* size of image */
+  gint				width;
+  gint				height;
+  gint				bpp;
+};
+
+struct _GstGdkAnimationClass 
+{
+  GdkPixbufAnimationClass	parent_class;
+};
+
+GType gst_gdk_animation_get_type (void);
+
+GdkPixbufAnimation *gst_gdk_animation_new_from_file (FILE *f, GError **error);
+
+
+#define GST_TYPE_GDK_ANIMATION_ITER		(gst_gdk_animation_iter_get_type ())
+#define GST_GDK_ANIMATION_ITER(object)		(G_TYPE_CHECK_INSTANCE_CAST ((object), GST_TYPE_GDK_ANIMATION_ITER, GstGdkAnimationIter))
+#define GST_IS_GDK_ANIMATION_ITER(object)	(G_TYPE_CHECK_INSTANCE_TYPE ((object), GST_TYPE_GDK_ANIMATION_ITER))
+
+#define GST_GDK_ANIMATION_ITER_CLASS(klass)	(G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_GDK_ANIMATION_ITER, GstGdkAnimationIterClass))
+#define GST_IS_GDK_ANIMATION_ITER_CLASS(klass)	(G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_GDK_ANIMATION_ITER))
+#define GST_GDK_ANIMATION_ITER_GET_CLASS(obj)	(G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_GDK_ANIMATION_ITER, GstGdkAnimationIterClass))
+
+struct _GstGdkAnimationIter {
+  GdkPixbufAnimationIter	parent;
+        
+  /* our animation */
+  GstGdkAnimation *		ani;
+  /* start timeval */
+  GTimeVal			start;
+  /* timestamp of last buffer */
+  GstClockTime			last_timestamp;
+  
+  /* pipeline we're using */
+  GstElement *			pipeline;
+  gboolean			eos;
+  
+  /* current image and the buffers containing the data */
+  GdkPixbuf *			pixbuf;
+  GQueue *			buffers;
+};
+
+struct _GstGdkAnimationIterClass {
+  GdkPixbufAnimationIterClass	parent_class;
+};
+
+GType gst_gdk_animation_iter_get_type (void) G_GNUC_CONST;
+
+G_END_DECLS
+
+#endif /* __GST_GDK_ANIMATION_H__ */