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

12 files changed, 704 insertions, 7 deletions

diff --git a/configure.ac b/configure.ac
index 29daf842..ac22aef5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -960,7 +960,7 @@ AG_GST_CHECK_FEATURE(LADSPA, [ladspa], ladspa, [
 dnl *** LV2 ***
 translit(dnm, m, l) AM_CONDITIONAL(USE_LV2, true)
 AG_GST_CHECK_FEATURE(LV2, [lv2], lv2, [
-  PKG_CHECK_MODULES(SLV2, slv2 >= 0.6.0, HAVE_SLV2="yes", HAVE_SLV2="no")
+  PKG_CHECK_MODULES(SLV2, slv2 >= 0.6.0, HAVE_LV2="yes", HAVE_LV2="no")
   AC_SUBST(SLV2_CFLAGS)
   AC_SUBST(SLV2_LIBS)
 ])
@@ -1644,6 +1644,7 @@ gst-libs/Makefile
 gst-libs/gst/Makefile
 gst-libs/gst/dshow/Makefile
 gst-libs/gst/interfaces/Makefile
+gst-libs/gst/signalprocessor/Makefile
 sys/Makefile
 sys/dshowdecwrapper/Makefile
 sys/acmenc/Makefile
@@ -1691,6 +1692,7 @@ ext/ivorbis/Makefile
 ext/jack/Makefile
 ext/jp2k/Makefile
 ext/ladspa/Makefile
+ext/lv2/Makefile
 ext/libmms/Makefile
 ext/Makefile
 ext/metadata/Makefile
diff --git a/ext/Makefile.am b/ext/Makefile.am
index f96337f9..8d395057 100644
--- a/ext/Makefile.am
+++ b/ext/Makefile.am
@@ -154,6 +154,12 @@ else
 LADSPA_DIR =
 endif
 
+if USE_LV2
+LV2_DIR = lv2
+else
+LV2_DIR =
+endif
+
 # if USE_LCS
 # LCS_DIR=lcs
 # else
@@ -351,6 +357,7 @@ SUBDIRS=\
 	$(JACK_DIR) \
 	$(JP2K_DIR) \
 	$(LADSPA_DIR) \
+	$(LV2_DIR) \
 	$(LCS_DIR) \
 	$(LIBFAME_DIR) \
 	$(LIBMMS_DIR) \
diff --git a/ext/ladspa/Makefile.am b/ext/ladspa/Makefile.am
index 0ea92746..00582ed7 100644
--- a/ext/ladspa/Makefile.am
+++ b/ext/ladspa/Makefile.am
@@ -1,9 +1,9 @@
 plugin_LTLIBRARIES = libgstladspa.la
 
-libgstladspa_la_SOURCES = gstsignalprocessor.c gstladspa.c
+libgstladspa_la_SOURCES = gstladspa.c
 libgstladspa_la_CFLAGS = $(GST_PLUGINS_BASE_CFLAGS) $(GST_CONTROLLER_CFLAGS) $(GST_CFLAGS) $(LRDF_CFLAGS)
-libgstladspa_la_LIBADD = $(GST_PLUGINS_BASE_LIBS) -lgstaudio-$(GST_MAJORMINOR) $(LIBM) $(LRDF_LIBS)
+libgstladspa_la_LIBADD = $(GST_PLUGINS_BASE_LIBS) -lgstaudio-$(GST_MAJORMINOR) $(LIBM) $(LRDF_LIBS) ../../gst-libs/gst/signalprocessor/libgstsignalprocessor.la
 libgstladspa_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
 libgstladspa_la_LIBTOOLFLAGS = --tag=disable-static
 
-noinst_HEADERS = gstsignalprocessor.h gstladspa.h
+noinst_HEADERS = gstladspa.h
diff --git a/ext/ladspa/gstladspa.h b/ext/ladspa/gstladspa.h
index 7ab94791..f51d6233 100644
--- a/ext/ladspa/gstladspa.h
+++ b/ext/ladspa/gstladspa.h
@@ -28,7 +28,7 @@
 
 #include <gst/gst.h>
 
-#include "gstsignalprocessor.h"
+#include "../../gst-libs/gst/signalprocessor/gstsignalprocessor.h"
 
 
 G_BEGIN_DECLS
diff --git a/ext/lv2/Makefile.am b/ext/lv2/Makefile.am
new file mode 100644
index 00000000..f10c7acf
--- /dev/null
+++ b/ext/lv2/Makefile.am
@@ -0,0 +1,9 @@
+plugin_LTLIBRARIES = libgstlv2.la
+
+libgstlv2_la_SOURCES = gstlv2.c
+libgstlv2_la_CFLAGS = $(GST_PLUGINS_BASE_CFLAGS) $(GST_CONTROLLER_CFLAGS) $(GST_CFLAGS) $(SLV2_CFLAGS)
+libgstlv2_la_LIBADD = $(GST_PLUGINS_BASE_LIBS) -lgstaudio-$(GST_MAJORMINOR) $(LIBM) $(SLV2_LIBS) ../../gst-libs/gst/signalprocessor/libgstsignalprocessor.la
+libgstlv2_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
+libgstlv2_la_LIBTOOLFLAGS = --tag=disable-static
+
+noinst_HEADERS = gstlv2.h
diff --git a/ext/lv2/gstlv2.c b/ext/lv2/gstlv2.c
new file mode 100644
index 00000000..5d05f603
--- /dev/null
+++ b/ext/lv2/gstlv2.c
@@ -0,0 +1,588 @@
+/* GStreamer
+ * Copyright (C) 1999 Erik Walthinsen <omega@cse.ogi.edu>
+ *               2001 Steve Baker <stevebaker_org@yahoo.co.uk>
+ *               2003 Andy Wingo <wingo at pobox.com>
+ *
+ * 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include <string.h>
+#include <math.h>
+#include <gst/audio/audio.h>
+#include <gst/controller/gstcontroller.h>
+
+#include "gstlv2.h"
+#include <slv2/slv2.h>
+
+#define GST_SLV2_PLUGIN_QDATA g_quark_from_static_string("slv2-plugin")
+
+static void gst_lv2_set_property (GObject * object,
+    guint prop_id, const GValue * value, GParamSpec * pspec);
+
+static void gst_lv2_get_property (GObject * object,
+    guint prop_id, GValue * value, GParamSpec * pspec);
+
+static gboolean gst_lv2_setup (GstSignalProcessor * sigproc, guint sample_rate);
+static gboolean gst_lv2_start (GstSignalProcessor * sigproc);
+static void gst_lv2_stop (GstSignalProcessor * sigproc);
+static void gst_lv2_cleanup (GstSignalProcessor * sigproc);
+static void gst_lv2_process (GstSignalProcessor * sigproc, guint nframes);
+
+static SLV2World world;
+SLV2Value audio_class;
+SLV2Value control_class;
+SLV2Value input_class;
+SLV2Value output_class;
+SLV2Value integer_prop;
+SLV2Value toggled_prop;
+
+static GstSignalProcessorClass *parent_class;
+
+static GstPlugin *gst_lv2_plugin;
+
+GST_DEBUG_CATEGORY_STATIC (lv2_debug);
+#define GST_CAT_DEFAULT lv2_debug
+
+
+static void
+gst_lv2_base_init (gpointer g_class)
+{
+  GstLV2Class *klass = (GstLV2Class *) g_class;
+  GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+  GstSignalProcessorClass *gsp_class = GST_SIGNAL_PROCESSOR_CLASS (g_class);
+  GstElementDetails *details;
+  SLV2Plugin lv2plugin;
+  SLV2Value val;
+  guint j, audio_in_count, audio_out_count, control_in_count, control_out_count;
+  gchar *klass_tags;
+
+  GST_DEBUG ("base_init %p", g_class);
+
+  lv2plugin = (SLV2Plugin) g_type_get_qdata (G_OBJECT_CLASS_TYPE (klass),
+      GST_SLV2_PLUGIN_QDATA);
+
+  g_assert (lv2plugin);
+
+  /* pad templates */
+  gsp_class->num_audio_in = 0;
+  gsp_class->num_audio_out = 0;
+  /* properties */
+  gsp_class->num_control_in = 0;
+  gsp_class->num_control_out = 0;
+
+  for (j = 0; j < slv2_plugin_get_num_ports (lv2plugin); j++) {
+    SLV2Port port = slv2_plugin_get_port_by_index (lv2plugin, j);
+    if (slv2_port_is_a (lv2plugin, port, audio_class)) {
+      gchar *name =
+          g_strdup (slv2_value_as_string (slv2_port_get_symbol (lv2plugin,
+                  port)));
+
+      GST_DEBUG ("LV2 port name: \"%s\"", name);
+
+      if (slv2_port_is_a (lv2plugin, port, input_class))
+        gst_signal_processor_class_add_pad_template (gsp_class, name,
+            GST_PAD_SINK, gsp_class->num_audio_in++);
+      else if (slv2_port_is_a (lv2plugin, port, output_class))
+        gst_signal_processor_class_add_pad_template (gsp_class, name,
+            GST_PAD_SRC, gsp_class->num_audio_out++);
+      /* TODO: else ignore plugin */
+
+      g_free (name);
+    } else if (slv2_port_is_a (lv2plugin, port, control_class)) {
+      if (slv2_port_is_a (lv2plugin, port, input_class))
+        gsp_class->num_control_in++;
+      else if (slv2_port_is_a (lv2plugin, port, output_class))
+        gsp_class->num_control_out++;
+      /* TODO: else ignore plugin */
+    }
+    /* TODO: else ignore plugin */
+  }
+
+  /* construct the element details struct */
+  details = g_new0 (GstElementDetails, 1);
+  val = slv2_plugin_get_name (lv2plugin);
+  if (val) {
+    details->longname = g_strdup (slv2_value_as_string (val));
+    slv2_value_free (val);
+  } else {
+    details->longname = g_strdup ("no description available");
+  }
+  details->description = details->longname;
+  val = slv2_plugin_get_author_name (lv2plugin);
+  if (val) {
+    details->author = g_strdup (slv2_value_as_string (val));
+    slv2_value_free (val);
+  } else {
+    details->author = g_strdup ("no author available");
+  }
+
+  if (gsp_class->num_audio_in == 0)
+    klass_tags = "Source/Audio/LV2";
+  else if (gsp_class->num_audio_out == 0) {
+    if (gsp_class->num_control_out == 0)
+      klass_tags = "Sink/Audio/LV2";
+    else
+      klass_tags = "Sink/Analyzer/Audio/LV2";
+  } else
+    klass_tags = "Filter/Effect/Audio/LV2";
+
+  details->klass = klass_tags;
+  GST_INFO ("tags : %s", details->klass);
+  gst_element_class_set_details (element_class, details);
+  g_free (details->longname);
+  g_free (details->author);
+  g_free (details);
+
+  klass->audio_in_portnums = g_new0 (gint, gsp_class->num_audio_in);
+  klass->audio_out_portnums = g_new0 (gint, gsp_class->num_audio_out);
+  klass->control_in_portnums = g_new0 (gint, gsp_class->num_control_in);
+  klass->control_out_portnums = g_new0 (gint, gsp_class->num_control_out);
+
+  audio_in_count = audio_out_count = control_in_count = control_out_count = 0;
+
+  for (j = 0; j < slv2_plugin_get_num_ports (lv2plugin); j++) {
+    SLV2Port port = slv2_plugin_get_port_by_index (lv2plugin, j);
+    gboolean is_input = slv2_port_is_a (lv2plugin, port, input_class);
+    if (slv2_port_is_a (lv2plugin, port, audio_class)) {
+      if (is_input)
+        klass->audio_in_portnums[audio_in_count++] = j;
+      else
+        klass->audio_out_portnums[audio_out_count++] = j;
+    } else if (slv2_port_is_a (lv2plugin, port, control_class)) {
+      if (is_input)
+        klass->control_in_portnums[control_in_count++] = j;
+      else
+        klass->control_out_portnums[control_out_count++] = j;
+    }
+  }
+
+  g_assert (audio_in_count == gsp_class->num_audio_in);
+  g_assert (audio_out_count == gsp_class->num_audio_out);
+  g_assert (control_in_count == gsp_class->num_control_in);
+  g_assert (control_out_count == gsp_class->num_control_out);
+
+  /*if (!LV2_IS_INPLACE_BROKEN (desc->Properties))
+     GST_SIGNAL_PROCESSOR_CLASS_SET_CAN_PROCESS_IN_PLACE (klass); */
+
+  klass->plugin = lv2plugin;
+}
+
+static gchar *
+gst_lv2_class_get_param_name (GstLV2Class * klass, gint portnum)
+{
+  SLV2Plugin lv2plugin = klass->plugin;
+  SLV2Port port = slv2_plugin_get_port_by_index (lv2plugin, portnum);
+  return g_strdup (slv2_value_as_string (slv2_port_get_symbol (lv2plugin,
+              port)));
+}
+
+static GParamSpec *
+gst_lv2_class_get_param_spec (GstLV2Class * klass, gint portnum)
+{
+  SLV2Plugin lv2plugin = klass->plugin;
+  SLV2Port port = slv2_plugin_get_port_by_index (lv2plugin, portnum);
+  SLV2Value lv2def, lv2min, lv2max;
+  GParamSpec *ret;
+  gchar *name;
+  gint perms;
+  gfloat lower = 0.0f, upper = 1.0f, def = 0.0f;
+
+  name = gst_lv2_class_get_param_name (klass, portnum);
+  perms = G_PARAM_READABLE;
+  if (slv2_port_is_a (lv2plugin, port, input_class))
+    perms |= G_PARAM_WRITABLE | G_PARAM_CONSTRUCT;
+  if (slv2_port_is_a (lv2plugin, port, control_class))
+    perms |= GST_PARAM_CONTROLLABLE;
+
+  if (slv2_port_has_property (lv2plugin, port, toggled_prop)) {
+    ret = g_param_spec_boolean (name, name, name, FALSE, perms);
+    g_free (name);
+    return ret;
+  }
+
+  slv2_port_get_range (lv2plugin, port, &lv2def, &lv2min, &lv2max);
+
+  if (lv2def)
+    def = slv2_value_as_float (lv2def);
+  if (lv2min)
+    lower = slv2_value_as_float (lv2min);
+  if (lv2max)
+    upper = slv2_value_as_float (lv2max);
+
+  if (def < lower) {
+    fprintf (stderr, "ERROR: %s BAD LOWER %f > %f\n",
+        slv2_value_as_string (slv2_plugin_get_uri (lv2plugin)), lower, def);
+    lower = def;
+  }
+
+  if (def > upper) {
+    fprintf (stderr, "ERROR: %s BAD UPPER %f < %f\n",
+        slv2_value_as_string (slv2_plugin_get_uri (lv2plugin)), upper, def);
+    upper = def;
+  }
+
+  if (slv2_port_has_property (lv2plugin, port, integer_prop))
+    ret = g_param_spec_int (name, name, name, lower, upper, def, perms);
+  else
+    ret = g_param_spec_float (name, name, name, lower, upper, def, perms);
+
+  g_free (name);
+
+  return ret;
+}
+
+static void
+gst_lv2_class_init (GstLV2Class * klass, SLV2Plugin lv2plugin)
+{
+  GObjectClass *gobject_class;
+  GstSignalProcessorClass *gsp_class;
+  gint i;
+
+  GST_DEBUG ("class_init %p", klass);
+
+  gobject_class = (GObjectClass *) klass;
+  gobject_class->set_property = gst_lv2_set_property;
+  gobject_class->get_property = gst_lv2_get_property;
+
+  gsp_class = GST_SIGNAL_PROCESSOR_CLASS (klass);
+  gsp_class->setup = gst_lv2_setup;
+  gsp_class->start = gst_lv2_start;
+  gsp_class->stop = gst_lv2_stop;
+  gsp_class->cleanup = gst_lv2_cleanup;
+  gsp_class->process = gst_lv2_process;
+
+  klass->plugin = lv2plugin;
+
+  /* register properties */
+
+  for (i = 0; i < gsp_class->num_control_in; i++) {
+    GParamSpec *p;
+
+    p = gst_lv2_class_get_param_spec (klass, klass->control_in_portnums[i]);
+
+    /* properties have an offset of 1 */
+    g_object_class_install_property (G_OBJECT_CLASS (klass), i + 1, p);
+  }
+
+  for (i = 0; i < gsp_class->num_control_out; i++) {
+    GParamSpec *p;
+
+    p = gst_lv2_class_get_param_spec (klass, klass->control_out_portnums[i]);
+
+    /* properties have an offset of 1, and we already added num_control_in */
+    g_object_class_install_property (G_OBJECT_CLASS (klass),
+        gsp_class->num_control_in + i + 1, p);
+  }
+}
+
+static void
+gst_lv2_init (GstLV2 * lv2, GstLV2Class * klass)
+{
+#if 0
+  lv2->plugin = klass->plugin;
+  lv2->instance = NULL;
+  lv2->activated = FALSE;
+  lv2->inplace_broken = LV2_IS_INPLACE_BROKEN (lv2->descriptor->Properties);
+#endif
+}
+
+static void
+gst_lv2_set_property (GObject * object, guint prop_id, const GValue * value,
+    GParamSpec * pspec)
+{
+#if 0
+  GstSignalProcessor *gsp;
+  GstSignalProcessorClass *gsp_class;
+
+  gsp = GST_SIGNAL_PROCESSOR (object);
+  gsp_class = GST_SIGNAL_PROCESSOR_GET_CLASS (object);
+
+  /* remember, properties have an offset of 1 */
+  prop_id--;
+
+  /* only input ports */
+  g_return_if_fail (prop_id < gsp_class->num_control_in);
+
+  /* now see what type it is */
+  switch (pspec->value_type) {
+    case G_TYPE_BOOLEAN:
+      gsp->control_in[prop_id] = g_value_get_boolean (value) ? 1.f : 0.f;
+      break;
+    case G_TYPE_INT:
+      gsp->control_in[prop_id] = g_value_get_int (value);
+      break;
+    case G_TYPE_FLOAT:
+      gsp->control_in[prop_id] = g_value_get_float (value);
+      break;
+    default:
+      g_assert_not_reached ();
+  }
+#endif
+}
+
+static void
+gst_lv2_get_property (GObject * object, guint prop_id, GValue * value,
+    GParamSpec * pspec)
+{
+#if 0
+  GstSignalProcessor *gsp;
+  GstSignalProcessorClass *gsp_class;
+  gfloat *controls;
+
+  gsp = GST_SIGNAL_PROCESSOR (object);
+  gsp_class = GST_SIGNAL_PROCESSOR_GET_CLASS (object);
+
+  /* remember, properties have an offset of 1 */
+  prop_id--;
+
+  if (prop_id < gsp_class->num_control_in) {
+    controls = gsp->control_in;
+  } else if (prop_id < gsp_class->num_control_in + gsp_class->num_control_out) {
+    controls = gsp->control_out;
+    prop_id -= gsp_class->num_control_in;
+  } else {
+    g_return_if_reached ();
+  }
+
+  /* now see what type it is */
+  switch (pspec->value_type) {
+    case G_TYPE_BOOLEAN:
+      g_value_set_boolean (value, controls[prop_id] > 0.5);
+      break;
+    case G_TYPE_INT:
+      g_value_set_int (value, CLAMP (controls[prop_id], G_MININT, G_MAXINT));
+      break;
+    case G_TYPE_FLOAT:
+      g_value_set_float (value, controls[prop_id]);
+      break;
+    default:
+      g_return_if_reached ();
+  }
+#endif
+}
+
+static gboolean
+gst_lv2_setup (GstSignalProcessor * gsp, guint sample_rate)
+{
+#if 0
+  GstLV2 *ladspa;
+  GstLV2Class *oclass;
+  GstSignalProcessorClass *gsp_class;
+  LV2_Descriptor *desc;
+  int i;
+
+  gsp_class = GST_SIGNAL_PROCESSOR_GET_CLASS (gsp);
+  ladspa = (GstLV2 *) gsp;
+  oclass = (GstLV2Class *) gsp_class;
+  desc = ladspa->descriptor;
+
+  g_return_val_if_fail (ladspa->handle == NULL, FALSE);
+  g_return_val_if_fail (ladspa->activated == FALSE, FALSE);
+
+  GST_DEBUG_OBJECT (ladspa, "instantiating the plugin at %d Hz", sample_rate);
+
+  ladspa->handle = desc->instantiate (desc, sample_rate);
+
+  g_return_val_if_fail (ladspa->handle != NULL, FALSE);
+
+  /* connect the control ports */
+  for (i = 0; i < gsp_class->num_control_in; i++)
+    desc->connect_port (ladspa->handle,
+        oclass->control_in_portnums[i], &(gsp->control_in[i]));
+  for (i = 0; i < gsp_class->num_control_out; i++)
+    desc->connect_port (ladspa->handle,
+        oclass->control_out_portnums[i], &(gsp->control_out[i]));
+#endif
+  return TRUE;
+}
+
+static gboolean
+gst_lv2_start (GstSignalProcessor * gsp)
+{
+#if 0
+  GstLV2 *ladspa;
+  LV2_Descriptor *desc;
+
+  ladspa = (GstLV2 *) gsp;
+  desc = ladspa->descriptor;
+
+  g_return_val_if_fail (ladspa->activated == FALSE, FALSE);
+  g_return_val_if_fail (ladspa->handle != NULL, FALSE);
+
+  GST_DEBUG_OBJECT (ladspa, "activating");
+
+  if (desc->activate)
+    desc->activate (ladspa->handle);
+
+  ladspa->activated = TRUE;
+#endif
+
+  return TRUE;
+}
+
+static void
+gst_lv2_stop (GstSignalProcessor * gsp)
+{
+#if 0
+  GstLV2 *ladspa;
+  LV2_Descriptor *desc;
+
+  ladspa = (GstLV2 *) gsp;
+  desc = ladspa->descriptor;
+
+  g_return_if_fail (ladspa->activated == TRUE);
+  g_return_if_fail (ladspa->handle != NULL);
+
+  GST_DEBUG_OBJECT (ladspa, "deactivating");
+
+  if (desc->activate)
+    desc->activate (ladspa->handle);
+
+  ladspa->activated = FALSE;
+#endif
+}
+
+static void
+gst_lv2_cleanup (GstSignalProcessor * gsp)
+{
+#if 0
+  GstLV2 *ladspa;
+  LV2_Descriptor *desc;
+
+  ladspa = (GstLV2 *) gsp;
+  desc = ladspa->descriptor;
+
+  g_return_if_fail (ladspa->activated == FALSE);
+  g_return_if_fail (ladspa->handle != NULL);
+
+  GST_DEBUG_OBJECT (ladspa, "cleaning up");
+
+  if (desc->cleanup)
+    desc->cleanup (ladspa->handle);
+
+  ladspa->handle = NULL;
+#endif
+}
+
+static void
+gst_lv2_process (GstSignalProcessor * gsp, guint nframes)
+{
+#if 0
+  GstSignalProcessorClass *gsp_class;
+  GstLV2 *ladspa;
+  GstLV2Class *oclass;
+  LV2_Descriptor *desc;
+  guint i;
+
+  gsp_class = GST_SIGNAL_PROCESSOR_GET_CLASS (gsp);
+  ladspa = (GstLV2 *) gsp;
+  oclass = (GstLV2Class *) gsp_class;
+  desc = ladspa->descriptor;
+
+  for (i = 0; i < gsp_class->num_audio_in; i++)
+    desc->connect_port (ladspa->handle, oclass->audio_in_portnums[i],
+        gsp->audio_in[i]);
+  for (i = 0; i < gsp_class->num_audio_out; i++)
+    desc->connect_port (ladspa->handle, oclass->audio_out_portnums[i],
+        gsp->audio_out[i]);
+
+  desc->run (ladspa->handle, nframes);
+#endif
+}
+
+/* search the plugin path
+ */
+static gboolean
+lv2_plugin_discover (void)
+{
+  unsigned i;
+  SLV2Plugins plugins = slv2_world_get_all_plugins (world);
+  for (i = 0; i < slv2_plugins_size (plugins); ++i) {
+    SLV2Plugin lv2plugin = slv2_plugins_get_at (plugins, i);
+    GTypeInfo typeinfo = {
+      sizeof (GstLV2Class),
+      (GBaseInitFunc) gst_lv2_base_init,
+      NULL,
+      (GClassInitFunc) gst_lv2_class_init,
+      NULL,
+      lv2plugin,
+      sizeof (GstLV2),
+      0,
+      (GInstanceInitFunc) gst_lv2_init,
+    };
+
+    GType type;
+
+    /* construct the type name from plugin URI */
+    gchar *type_name = g_strdup_printf ("%s",
+        slv2_value_as_uri (slv2_plugin_get_uri (lv2plugin)));
+    g_strcanon (type_name, G_CSET_A_2_Z G_CSET_a_2_z G_CSET_DIGITS "-+", '-');
+
+    /* if it's already registered, drop it */
+    if (g_type_from_name (type_name))
+      goto next;
+
+    /* create the type */
+    type =
+        g_type_register_static (GST_TYPE_SIGNAL_PROCESSOR, type_name, &typeinfo,
+        0);
+
+    /* FIXME: not needed anymore when we can add pad templates, etc in class_init
+     * as class_data contains the LADSPA_Descriptor too */
+    g_type_set_qdata (type, GST_SLV2_PLUGIN_QDATA, (gpointer) lv2plugin);
+
+    if (!gst_element_register (gst_lv2_plugin, type_name, GST_RANK_NONE, type))
+      goto next;
+
+  next:
+    g_free (type_name);
+  }
+  return TRUE;
+}
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+  GST_DEBUG_CATEGORY_INIT (lv2_debug, "lv2",
+      GST_DEBUG_FG_GREEN | GST_DEBUG_BG_BLACK | GST_DEBUG_BOLD, "LV2");
+
+  world = slv2_world_new ();
+  slv2_world_load_all (world);
+
+  audio_class = slv2_value_new_uri (world, SLV2_PORT_CLASS_AUDIO);
+  control_class = slv2_value_new_uri (world, SLV2_PORT_CLASS_CONTROL);
+  input_class = slv2_value_new_uri (world, SLV2_PORT_CLASS_INPUT);
+  output_class = slv2_value_new_uri (world, SLV2_PORT_CLASS_OUTPUT);
+  integer_prop =
+      slv2_value_new_uri (world, "http://lv2plug.in/ns/lv2core#integer");
+  toggled_prop =
+      slv2_value_new_uri (world, "http://lv2plug.in/ns/lv2core#toggled");
+
+  parent_class = g_type_class_ref (GST_TYPE_SIGNAL_PROCESSOR);
+
+  gst_lv2_plugin = plugin;
+
+  return lv2_plugin_discover ();
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+    GST_VERSION_MINOR,
+    "lv2",
+    "All LV2 plugins",
+    plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
diff --git a/ext/lv2/gstlv2.h b/ext/lv2/gstlv2.h
new file mode 100644
index 00000000..f76235b4
--- /dev/null
+++ b/ext/lv2/gstlv2.h
@@ -0,0 +1,76 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * gstladspa.h: Header for LV2 plugin
+ *
+ * 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_LV2_H__
+#define __GST_LV2_H__
+
+
+#include <slv2/slv2.h>
+
+#include <gst/gst.h>
+
+#include "../../gst-libs/gst/signalprocessor/gstsignalprocessor.h"
+
+
+G_BEGIN_DECLS
+
+
+typedef struct _lv2_control_info {
+  gchar *name;
+  gchar *param_name;
+  gfloat lowerbound, upperbound;
+  gfloat def;
+  gboolean lower, upper, samplerate;
+  gboolean toggled, logarithmic, integer, writable;
+} lv2_control_info;
+
+
+typedef struct _GstLV2 GstLV2;
+typedef struct _GstLV2Class GstLV2Class;
+
+
+struct _GstLV2 {
+  GstSignalProcessor parent;
+
+  SLV2Plugin *plugin;
+  SLV2Instance *instance;
+
+  gboolean activated;
+  gboolean inplace_broken;
+};
+
+struct _GstLV2Class {
+  GstSignalProcessorClass parent_class;
+
+  SLV2Plugin plugin;
+
+  gint *audio_in_portnums;
+  gint *audio_out_portnums;
+  gint *control_in_portnums;
+  gint *control_out_portnums;
+};
+
+
+G_END_DECLS
+
+
+#endif /* __GST_LV2_H__ */
diff --git a/gst-libs/gst/Makefile.am b/gst-libs/gst/Makefile.am
index c50f8f4b..3471a759 100644
--- a/gst-libs/gst/Makefile.am
+++ b/gst-libs/gst/Makefile.am
@@ -1,5 +1,5 @@
 
-SUBDIRS = interfaces
+SUBDIRS = interfaces signalprocessor
 
 noinst_HEADERS = gst-i18n-plugin.h gettext.h
-DIST_SUBDIRS = dshow interfaces
+DIST_SUBDIRS = dshow interfaces signalprocessor
diff --git a/gst-libs/gst/signalprocessor/.gitignore b/gst-libs/gst/signalprocessor/.gitignore
new file mode 100644
index 00000000..08f5ed37
--- /dev/null
+++ b/gst-libs/gst/signalprocessor/.gitignore
@@ -0,0 +1,7 @@
+Makefile
+Makefile.in
+*.o
+*.lo
+*.la
+.deps
+.libs
diff --git a/gst-libs/gst/signalprocessor/Makefile.am b/gst-libs/gst/signalprocessor/Makefile.am
new file mode 100644
index 00000000..a8455390
--- /dev/null
+++ b/gst-libs/gst/signalprocessor/Makefile.am
@@ -0,0 +1,8 @@
+lib_LTLIBRARIES = libgstsignalprocessor.la
+
+noinst_HEADERS = gstsignalprocessor.h
+
+libgstsignalprocessor_la_SOURCES = gstsignalprocessor.c
+libgstsignalprocessor_la_CFLAGS = $(GST_PLUGINS_BASE_CFLAGS) $(GST_CFLAGS)
+libgstsignalprocessor_la_LDFLAGS = $(GST_PLUGINS_BASE_LIBS)
+
diff --git a/ext/ladspa/gstsignalprocessor.c b/gst-libs/gst/signalprocessor/gstsignalprocessor.c
index c46ae7a8..c46ae7a8 100644
--- a/ext/ladspa/gstsignalprocessor.c
+++ b/gst-libs/gst/signalprocessor/gstsignalprocessor.c
diff --git a/ext/ladspa/gstsignalprocessor.h b/gst-libs/gst/signalprocessor/gstsignalprocessor.h
index d6f0d0b0..d6f0d0b0 100644
--- a/ext/ladspa/gstsignalprocessor.h
+++ b/gst-libs/gst/signalprocessor/gstsignalprocessor.h