Working LV2 plugin discovery.

- Separate gstsignalprocessor into a separate library (not sure if this
  is in the right place, but it works for now anyway)
- Create LV2 element based on LADSPA element, port most discovery
  functionality

1 files changed, 124 insertions, 0 deletions

diff --git a/gst-libs/gst/signalprocessor/gstsignalprocessor.h b/gst-libs/gst/signalprocessor/gstsignalprocessor.h
new file mode 100644
index 00000000..d6f0d0b0
--- /dev/null
+++ b/gst-libs/gst/signalprocessor/gstsignalprocessor.h
@@ -0,0 +1,124 @@
+/* GStreamer
+ * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
+ *                    2005 Wim Taymans <wim@fluendo.com>
+ *
+ * gstsignalprocessor.h:
+ *
+ * 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_SIGNAL_PROCESSOR_H__
+#define __GST_SIGNAL_PROCESSOR_H__
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+
+typedef enum 
+{
+  GST_SIGNAL_PROCESSOR_CLASS_FLAG_CAN_PROCESS_IN_PLACE = 1<<0
+} GstSignalProcessorClassFlags;
+
+#define GST_SIGNAL_PROCESSOR_CLASS_CAN_PROCESS_IN_PLACE(klass)		\
+  (GST_SIGNAL_PROCESSOR_CLASS (klass)->flags & 				\
+   GST_SIGNAL_PROCESSOR_CLASS_FLAG_CAN_PROCESS_IN_PLACE)
+#define GST_SIGNAL_PROCESSOR_CLASS_SET_CAN_PROCESS_IN_PLACE(klass)	\
+  GST_SIGNAL_PROCESSOR_CLASS (klass)->flags |=				\
+    GST_SIGNAL_PROCESSOR_CLASS_FLAG_CAN_PROCESS_IN_PLACE
+
+typedef enum 
+{
+  GST_SIGNAL_PROCESSOR_STATE_NULL,
+  GST_SIGNAL_PROCESSOR_STATE_INITIALIZED,
+  GST_SIGNAL_PROCESSOR_STATE_RUNNING
+} GstSignalProcessorState;
+
+
+#define GST_TYPE_SIGNAL_PROCESSOR            (gst_signal_processor_get_type())
+#define GST_SIGNAL_PROCESSOR(obj)            (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SIGNAL_PROCESSOR,GstSignalProcessor))
+#define GST_SIGNAL_PROCESSOR_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_SIGNAL_PROCESSOR,GstSignalProcessorClass))
+#define GST_SIGNAL_PROCESSOR_GET_CLASS(obj) \
+        (G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_SIGNAL_PROCESSOR,GstSignalProcessorClass))
+#define GST_IS_SIGNAL_PROCESSOR(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_SIGNAL_PROCESSOR))
+#define GST_IS_SIGNAL_PROCESSOR_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_SIGNAL_PROCESSOR))
+
+#define GST_SIGNAL_PROCESSOR_IS_INITIALIZED(obj) \
+  (GST_SIGNAL_PROCESSOR (obj)->state >= GST_SIGNAL_PROCESSOR_STATE_INITIALIZED)
+#define GST_SIGNAL_PROCESSOR_IS_RUNNING(obj) \
+  (GST_SIGNAL_PROCESSOR (obj)->state == GST_SIGNAL_PROCESSOR_STATE_RUNNING)
+
+typedef struct _GstSignalProcessor GstSignalProcessor;
+typedef struct _GstSignalProcessorClass GstSignalProcessorClass;
+
+
+struct _GstSignalProcessor {
+  GstElement     element;
+
+  GstCaps *caps;
+
+  guint sample_rate;
+
+  GstSignalProcessorState state;
+
+  GstFlowReturn flow_state;
+
+  GstActivateMode mode;
+
+  /* pending inputs before processing can take place */
+  guint pending_in;
+  /* panding outputs to be filled */
+  guint pending_out;
+
+  gfloat *control_in;
+  gfloat **audio_in;
+  gfloat *control_out;
+  gfloat **audio_out;
+};
+
+struct _GstSignalProcessorClass {
+  GstElementClass parent_class;
+
+  /*< public >*/
+  guint num_control_in;
+  guint num_audio_in;
+  guint num_control_out;
+  guint num_audio_out;
+
+  guint flags;
+
+  /* virtual methods for subclasses */
+
+  gboolean      (*setup)        (GstSignalProcessor *self, guint sample_rate);
+  gboolean      (*start)        (GstSignalProcessor *self);
+  void          (*stop)         (GstSignalProcessor *self);
+  void          (*cleanup)      (GstSignalProcessor *self);
+  void          (*process)      (GstSignalProcessor *self, guint num_frames);
+  gboolean      (*event)        (GstSignalProcessor *self, GstEvent *event);
+};
+
+
+GType gst_signal_processor_get_type (void);
+void gst_signal_processor_class_add_pad_template (GstSignalProcessorClass *klass,
+    const gchar *name, GstPadDirection direction, guint index);
+
+
+
+G_END_DECLS
+
+
+#endif /* __GST_SIGNAL_PROCESSOR_H__ */