[MOVED FROM GST-P-FARSIGHT] Add liveadder element

20080329004518-3e2dc-40e4746fe82bbc5a871f03fe6ff6048f436c9f85.gz

gst/liveadder/Makefile.am

@@ -0,0 +1,8 @@
+plugin_LTLIBRARIES = libgstliveadder.la
+
+libgstliveadder_la_SOURCES = liveadder.c
+libgstliveadder_la_CFLAGS = $(GST_CFLAGS) $(GST_PLUGINS_BASE_CFLAGS) $(ERROR_CFLAGS)
+libgstliveadder_la_LIBADD = $(GST_LIBS_LIBS)
+libgstliveadder_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS) $(GST_BASE_LIBS) $(GST_PLUGINS_BASE_LIBS) -lgstaudio-0.10
+
+noinst_HEADERS = liveadder.h

gst/liveadder/liveadder.h

@@ -0,0 +1,104 @@
+/*
+ * Farsight Voice+Video library
+ *
+ *  Copyright 2008 Collabora Ltd
+ *  Copyright 2008 Nokia Corporation
+ *   @author: Olivier Crete <olivier.crete@collabora.co.uk>
+ *
+ * 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_LIVE_ADDER_H__
+#define __GST_LIVE_ADDER_H__
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_LIVE_ADDER            (gst_live_adder_get_type())
+#define GST_LIVE_ADDER(obj)            (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_LIVE_ADDER,GstLiveAdder))
+#define GST_IS_LIVE_ADDER(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_LIVE_ADDER))
+#define GST_LIVE_ADDER_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_LIVE_ADDER,GstLiveAdderClass))
+#define GST_IS_LIVE_ADDER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_LIVE_ADDER))
+#define GST_LIVE_ADDER_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_LIVE_ADDER,GstLiveAdderClass))
+
+typedef struct _GstLiveAdder             GstLiveAdder;
+typedef struct _GstLiveAdderClass        GstLiveAdderClass;
+
+typedef enum {
+  GST_LIVE_ADDER_FORMAT_UNSET,
+  GST_LIVE_ADDER_FORMAT_INT,
+  GST_LIVE_ADDER_FORMAT_FLOAT
+} GstLiveAdderFormat;
+
+typedef void (*GstLiveAdderFunction) (gpointer out, gpointer in, guint size);
+
+/**
+ * GstLiveAdder:
+ *
+ * The adder object structure.
+ */
+struct _GstLiveAdder {
+  GstElement      element;
+
+  GstPad         *srcpad;
+  /* pad counter, used for creating unique request pads */
+  gint            padcount;
+  GList          *sinkpads;
+
+  GstFlowReturn   srcresult;
+  GstClockID      clock_id;
+
+  /* the queue is ordered head to tail */
+  GQueue         *buffers;
+  GCond          *not_empty_cond;
+
+  GstClockTime    next_timestamp;
+
+  /* the next are valid for both int and float */
+  GstLiveAdderFormat  format;
+  gint            rate;
+  gint            channels;
+  gint            width;
+  gint            endianness;
+
+  /* the next are valid only for format == GST_LIVE_ADDER_FORMAT_INT */
+  gint            depth;
+  gboolean        is_signed;
+
+  /* number of bytes per sample, actually width/8 * channels */
+  gint            bps;
+
+  /* function to add samples */
+  GstLiveAdderFunction func;
+
+  GstClockTime    latency_ms;
+  GstClockTime    peer_latency;
+};
+
+struct _GstLiveAdderClass {
+  GstElementClass parent_class;
+};
+
+GType    gst_live_adder_get_type (void);
+
+G_END_DECLS
+
+
+#endif /* __GST_LIVE_ADDER_H__ */