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

4 files changed, 4 insertions, 1152 deletions

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/ladspa/gstsignalprocessor.c b/ext/ladspa/gstsignalprocessor.c
deleted file mode 100644
index c46ae7a8..00000000
--- a/ext/ladspa/gstsignalprocessor.c
+++ /dev/null
@@ -1,1024 +0,0 @@
-/* GStreamer
- * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
- *                    2000 Wim Taymans <wtay@chello.be>
- *                    2005 Wim Taymans <wim@fluendo.com>
- *
- * gstsignalprocessor.c: 
- *
- * 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.
- */
-
-/*
- * SECTION:gstsignalprocessor
- *
- * This baseclass allows to write elements that need data on all pads before
- * their processing function can run.
- *
- * In push mode (gst_signal_processor_chain) it operates as follows:
- * 1. store each received buffer on the pad and decrement pending_in
- * 2. when pending_in==0, process as much as we can and push outputs
- *
- * In pull mode (gst_signal_processor_getrange) is operates as follows:
- * 1. if there is an output ready, deliver
- * 2. otherwise pull from each sink-pad, process requested frames and deliver
- *    the buffer
- */
-
-#include <stdlib.h>
-
-#ifdef HAVE_CONFIG_H
-#  include "config.h"
-#endif
-
-#include <gst/audio/audio.h>
-#include "gstsignalprocessor.h"
-
-
-GST_DEBUG_CATEGORY_STATIC (gst_signal_processor_debug);
-#define GST_CAT_DEFAULT gst_signal_processor_debug
-
-/* FIXME: this is mono only */
-static GstStaticCaps template_caps =
-GST_STATIC_CAPS (GST_AUDIO_FLOAT_STANDARD_PAD_TEMPLATE_CAPS);
-
-#define GST_TYPE_SIGNAL_PROCESSOR_PAD_TEMPLATE \
-    (gst_signal_processor_pad_template_get_type ())
-#define GST_SIGNAL_PROCESSOR_PAD_TEMPLATE(obj) \
-    (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SIGNAL_PROCESSOR_PAD_TEMPLATE,\
-    GstSignalProcessorPadTemplate))
-typedef struct _GstSignalProcessorPadTemplate GstSignalProcessorPadTemplate;
-typedef GstPadTemplateClass GstSignalProcessorPadTemplateClass;
-
-struct _GstSignalProcessorPadTemplate
-{
-  GstPadTemplate parent;
-
-  guint index;
-};
-
-static GType
-gst_signal_processor_pad_template_get_type (void)
-{
-  static GType type = 0;
-
-  if (!type) {
-    static const GTypeInfo info = {
-      sizeof (GstSignalProcessorPadTemplateClass), NULL, NULL, NULL, NULL,
-      NULL, sizeof (GstSignalProcessorPadTemplate), 0, NULL
-    };
-
-    type = g_type_register_static (GST_TYPE_PAD_TEMPLATE,
-        "GstSignalProcessorPadTemplate", &info, 0);
-  }
-  return type;
-}
-
-/*
- * gst_signal_processor_class_add_pad_template:
- * @klass: element class
- * @name: pad name
- * @direction: pad direction (src/sink)
- * @index: index for the pad per direction (starting from 0)
- *
- */
-void
-gst_signal_processor_class_add_pad_template (GstSignalProcessorClass * klass,
-    const gchar * name, GstPadDirection direction, guint index)
-{
-  GstPadTemplate *new;
-  GstCaps *caps;
-
-  g_return_if_fail (GST_IS_SIGNAL_PROCESSOR_CLASS (klass));
-  g_return_if_fail (name != NULL);
-  g_return_if_fail (direction == GST_PAD_SRC || direction == GST_PAD_SINK);
-
-  /* FIXME: would be nice to have the template as a parameter, right now this can
-   * only create mono pads */
-  caps = gst_caps_copy (gst_static_caps_get (&template_caps));
-
-  new = g_object_new (gst_signal_processor_pad_template_get_type (),
-      "name", name, "name-template", name,
-      "direction", direction, "presence", GST_PAD_ALWAYS, "caps", caps, NULL);
-
-  GST_SIGNAL_PROCESSOR_PAD_TEMPLATE (new)->index = index;
-
-  gst_element_class_add_pad_template (GST_ELEMENT_CLASS (klass), new);
-}
-
-
-#define GST_TYPE_SIGNAL_PROCESSOR_PAD (gst_signal_processor_pad_get_type ())
-#define GST_SIGNAL_PROCESSOR_PAD(obj) \
-    (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SIGNAL_PROCESSOR_PAD,\
-    GstSignalProcessorPad))
-typedef struct _GstSignalProcessorPad GstSignalProcessorPad;
-typedef GstPadClass GstSignalProcessorPadClass;
-
-struct _GstSignalProcessorPad
-{
-  GstPad parent;
-
-  GstBuffer *pen;
-
-  /* index for the pad per direction (starting from 0) */
-  guint index;
-
-  /* these are only used for sink pads */
-  guint samples_avail;          /* available mono sample frames */
-  gfloat *data;                 /* data pointer to read from / write to */
-};
-
-static GType
-gst_signal_processor_pad_get_type (void)
-{
-  static GType type = 0;
-
-  if (!type) {
-    static const GTypeInfo info = {
-      sizeof (GstSignalProcessorPadClass), NULL, NULL, NULL, NULL,
-      NULL, sizeof (GstSignalProcessorPad), 0, NULL
-    };
-
-    type = g_type_register_static (GST_TYPE_PAD,
-        "GstSignalProcessorPad", &info, 0);
-  }
-  return type;
-}
-
-
-GST_BOILERPLATE (GstSignalProcessor, gst_signal_processor, GstElement,
-    GST_TYPE_ELEMENT);
-
-
-static void gst_signal_processor_finalize (GObject * object);
-static gboolean gst_signal_processor_src_activate_pull (GstPad * pad,
-    gboolean active);
-static gboolean gst_signal_processor_sink_activate_push (GstPad * pad,
-    gboolean active);
-static GstStateChangeReturn gst_signal_processor_change_state (GstElement *
-    element, GstStateChange transition);
-
-static gboolean gst_signal_processor_event (GstPad * pad, GstEvent * event);
-static GstFlowReturn gst_signal_processor_getrange (GstPad * pad,
-    guint64 offset, guint length, GstBuffer ** buffer);
-static GstFlowReturn gst_signal_processor_chain (GstPad * pad,
-    GstBuffer * buffer);
-static gboolean gst_signal_processor_setcaps (GstPad * pad, GstCaps * caps);
-
-
-static void
-gst_signal_processor_base_init (gpointer g_class)
-{
-  GST_DEBUG_CATEGORY_INIT (gst_signal_processor_debug, "gst-dsp", 0,
-      "signalprocessor element");
-}
-
-static void
-gst_signal_processor_class_init (GstSignalProcessorClass * klass)
-{
-  GObjectClass *gobject_class;
-  GstElementClass *gstelement_class;
-
-  gobject_class = G_OBJECT_CLASS (klass);
-  gstelement_class = GST_ELEMENT_CLASS (klass);
-
-  gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_signal_processor_finalize);
-
-  gstelement_class->change_state =
-      GST_DEBUG_FUNCPTR (gst_signal_processor_change_state);
-}
-
-static void
-gst_signal_processor_add_pad_from_template (GstSignalProcessor * self,
-    GstPadTemplate * templ)
-{
-  GstPad *new;
-
-  new = g_object_new (GST_TYPE_SIGNAL_PROCESSOR_PAD,
-      "name", GST_OBJECT_NAME (templ), "direction", templ->direction,
-      "template", templ, NULL);
-  GST_SIGNAL_PROCESSOR_PAD (new)->index =
-      GST_SIGNAL_PROCESSOR_PAD_TEMPLATE (templ)->index;
-
-  gst_pad_set_setcaps_function (new,
-      GST_DEBUG_FUNCPTR (gst_signal_processor_setcaps));
-
-  if (templ->direction == GST_PAD_SINK) {
-    GST_DEBUG ("added new sink pad");
-
-    gst_pad_set_event_function (new,
-        GST_DEBUG_FUNCPTR (gst_signal_processor_event));
-    gst_pad_set_chain_function (new,
-        GST_DEBUG_FUNCPTR (gst_signal_processor_chain));
-    gst_pad_set_activatepush_function (new,
-        GST_DEBUG_FUNCPTR (gst_signal_processor_sink_activate_push));
-  } else {
-    GST_DEBUG ("added new src pad");
-
-    gst_pad_set_getrange_function (new,
-        GST_DEBUG_FUNCPTR (gst_signal_processor_getrange));
-    gst_pad_set_activatepull_function (new,
-        GST_DEBUG_FUNCPTR (gst_signal_processor_src_activate_pull));
-  }
-
-  gst_element_add_pad (GST_ELEMENT (self), new);
-}
-
-static void
-gst_signal_processor_init (GstSignalProcessor * self,
-    GstSignalProcessorClass * klass)
-{
-  GList *templates;
-
-  templates =
-      gst_element_class_get_pad_template_list (GST_ELEMENT_CLASS (klass));
-
-  while (templates) {
-    GstPadTemplate *templ = GST_PAD_TEMPLATE (templates->data);
-
-    gst_signal_processor_add_pad_from_template (self, templ);
-    templates = templates->next;
-  }
-
-  self->state = GST_SIGNAL_PROCESSOR_STATE_NULL;
-
-  self->audio_in = g_new0 (gfloat *, klass->num_audio_in);
-  self->control_in = g_new0 (gfloat, klass->num_control_in);
-  self->audio_out = g_new0 (gfloat *, klass->num_audio_out);
-  self->control_out = g_new0 (gfloat, klass->num_control_out);
-
-  /* init */
-  self->pending_in = klass->num_audio_in;
-  self->pending_out = 0;
-
-  self->sample_rate = 0;
-}
-
-static void
-gst_signal_processor_finalize (GObject * object)
-{
-  GstSignalProcessor *self = GST_SIGNAL_PROCESSOR (object);
-
-  g_free (self->audio_in);
-  self->audio_in = NULL;
-  g_free (self->control_in);
-  self->control_in = NULL;
-  g_free (self->audio_out);
-  self->audio_out = NULL;
-  g_free (self->control_out);
-  self->control_out = NULL;
-
-  G_OBJECT_CLASS (parent_class)->finalize (object);
-}
-
-static gboolean
-gst_signal_processor_setup (GstSignalProcessor * self, guint sample_rate)
-{
-  GstSignalProcessorClass *klass;
-  gboolean ret = TRUE;
-
-  klass = GST_SIGNAL_PROCESSOR_GET_CLASS (self);
-
-  GST_INFO_OBJECT (self, "setup()");
-
-  g_return_val_if_fail (self->state == GST_SIGNAL_PROCESSOR_STATE_NULL, FALSE);
-
-  if (klass->setup)
-    ret = klass->setup (self, sample_rate);
-
-  if (!ret)
-    goto setup_failed;
-
-  self->state = GST_SIGNAL_PROCESSOR_STATE_INITIALIZED;
-
-  return ret;
-
-setup_failed:
-  {
-    GST_INFO_OBJECT (self, "setup() failed at %u Hz", sample_rate);
-    return ret;
-  }
-}
-
-static gboolean
-gst_signal_processor_start (GstSignalProcessor * self)
-{
-  GstSignalProcessorClass *klass;
-  gboolean ret = TRUE;
-
-  klass = GST_SIGNAL_PROCESSOR_GET_CLASS (self);
-
-  g_return_val_if_fail (self->state == GST_SIGNAL_PROCESSOR_STATE_INITIALIZED,
-      FALSE);
-
-  GST_INFO_OBJECT (self, "start()");
-
-  if (klass->start)
-    ret = klass->start (self);
-
-  if (!ret)
-    goto start_failed;
-
-  self->state = GST_SIGNAL_PROCESSOR_STATE_RUNNING;
-
-  return ret;
-
-start_failed:
-  {
-    GST_INFO_OBJECT (self, "start() failed");
-    return ret;
-  }
-}
-
-static void
-gst_signal_processor_stop (GstSignalProcessor * self)
-{
-  GstSignalProcessorClass *klass;
-  GstElement *elem;
-  GList *sinks;
-
-  klass = GST_SIGNAL_PROCESSOR_GET_CLASS (self);
-  elem = GST_ELEMENT (self);
-
-  GST_INFO_OBJECT (self, "stop()");
-
-  g_return_if_fail (self->state == GST_SIGNAL_PROCESSOR_STATE_RUNNING);
-
-  if (klass->stop)
-    klass->stop (self);
-
-  for (sinks = elem->sinkpads; sinks; sinks = sinks->next)
-    /* force set_caps when going to RUNNING, see note in _setcaps () */
-    gst_pad_set_caps (GST_PAD (sinks->data), NULL);
-
-  /* should also flush our buffers perhaps? */
-
-  self->state = GST_SIGNAL_PROCESSOR_STATE_INITIALIZED;
-}
-
-static void
-gst_signal_processor_cleanup (GstSignalProcessor * self)
-{
-  GstSignalProcessorClass *klass;
-
-  klass = GST_SIGNAL_PROCESSOR_GET_CLASS (self);
-
-  GST_INFO_OBJECT (self, "cleanup()");
-
-  g_return_if_fail (self->state == GST_SIGNAL_PROCESSOR_STATE_INITIALIZED);
-
-  if (klass->cleanup)
-    klass->cleanup (self);
-
-  self->state = GST_SIGNAL_PROCESSOR_STATE_NULL;
-}
-
-static gboolean
-gst_signal_processor_setcaps_pull (GstSignalProcessor * self, GstPad * pad,
-    GstCaps * caps)
-{
-  if (GST_PAD_IS_SRC (pad)) {
-    GList *l;
-
-    for (l = GST_ELEMENT (self)->sinkpads; l; l = l->next)
-      if (!gst_pad_set_caps (GST_PAD (l->data), caps))
-        goto src_setcaps_failed;
-  } else {
-    GstPad *peer;
-    gboolean res;
-
-    peer = gst_pad_get_peer (pad);
-    if (!peer)
-      goto unlinked_sink;
-
-    res = gst_pad_set_caps (peer, caps);
-    gst_object_unref (peer);
-
-    if (!res)
-      goto peer_setcaps_failed;
-  }
-
-  return TRUE;
-
-src_setcaps_failed:
-  {
-    /* not logging, presumably the sink pad already logged */
-    return FALSE;
-  }
-unlinked_sink:
-  {
-    GST_WARNING_OBJECT (self, "unlinked sink pad %" GST_PTR_FORMAT ", I wonder "
-        "how we passed activate_pull()", pad);
-    return FALSE;
-  }
-peer_setcaps_failed:
-  {
-    GST_INFO_OBJECT (self, "peer of %" GST_PTR_FORMAT " did not accept caps",
-        pad);
-    return FALSE;
-  }
-}
-
-static gboolean
-gst_signal_processor_setcaps (GstPad * pad, GstCaps * caps)
-{
-  GstSignalProcessor *self;
-
-  self = GST_SIGNAL_PROCESSOR (gst_pad_get_parent (pad));
-
-  if (self->mode == GST_ACTIVATE_PULL && !gst_caps_is_equal (caps, self->caps)
-      && !gst_signal_processor_setcaps_pull (self, pad, caps))
-    goto setcaps_pull_failed;
-
-  /* the whole processor has one caps; if the sample rate changes, let subclass
-     implementations know */
-  if (!gst_caps_is_equal (caps, self->caps)) {
-    GstStructure *s;
-    gint sample_rate;
-
-    GST_DEBUG_OBJECT (pad, "got caps %" GST_PTR_FORMAT, caps);
-
-    s = gst_caps_get_structure (caps, 0);
-    if (!gst_structure_get_int (s, "rate", &sample_rate)) {
-      GST_WARNING ("got no sample-rate");
-      goto impossible;
-    }
-
-    GST_DEBUG_OBJECT (self, "Got rate=%d", sample_rate);
-
-    if (GST_SIGNAL_PROCESSOR_IS_RUNNING (self))
-      gst_signal_processor_stop (self);
-    if (GST_SIGNAL_PROCESSOR_IS_INITIALIZED (self))
-      gst_signal_processor_cleanup (self);
-
-    if (!gst_signal_processor_setup (self, sample_rate))
-      goto start_or_setup_failed;
-
-    self->sample_rate = sample_rate;
-    gst_caps_replace (&self->caps, caps);
-  } else {
-    GST_DEBUG_OBJECT (self, "skipping, have caps already");
-  }
-
-  /* we use this method to manage the processor's state, hence the caps clearing
-     in stop(). so it can be that we enter here just to manage the processor's
-     state, to take it to RUNNING from already being INITIALIZED with the right
-     sample rate (e.g., when having gone PLAYING->READY->PLAYING). make sure
-     when we leave that the processor is RUNNING. */
-  if (!GST_SIGNAL_PROCESSOR_IS_INITIALIZED (self)
-      && !gst_signal_processor_setup (self, self->sample_rate))
-    goto start_or_setup_failed;
-  if (!GST_SIGNAL_PROCESSOR_IS_RUNNING (self)
-      && !gst_signal_processor_start (self))
-    goto start_or_setup_failed;
-
-  gst_object_unref (self);
-
-  return TRUE;
-
-start_or_setup_failed:
-  {
-    gst_object_unref (self);
-    return FALSE;
-  }
-setcaps_pull_failed:
-  {
-    gst_object_unref (self);
-    return FALSE;
-  }
-impossible:
-  {
-    g_critical ("something impossible happened");
-    gst_object_unref (self);
-    return FALSE;
-  }
-}
-
-static gboolean
-gst_signal_processor_event (GstPad * pad, GstEvent * event)
-{
-  GstSignalProcessor *self;
-  GstSignalProcessorClass *bclass;
-  gboolean ret;
-
-  self = GST_SIGNAL_PROCESSOR (gst_pad_get_parent (pad));
-  bclass = GST_SIGNAL_PROCESSOR_GET_CLASS (self);
-
-  /* FIXME, this probably isn't the correct interface: what about return values,
-   * what about overriding event_default
-   * Sync with GstBaseTransform::gst_base_transform_sink_event */
-  if (bclass->event)
-    bclass->event (self, event);
-
-  switch (GST_EVENT_TYPE (event)) {
-    case GST_EVENT_FLUSH_START:
-      break;
-    case GST_EVENT_FLUSH_STOP:
-      /* clear errors now */
-      self->flow_state = GST_FLOW_OK;
-      break;
-    default:
-      break;
-  }
-  ret = gst_pad_event_default (pad, event);
-
-  gst_object_unref (self);
-
-  return ret;
-}
-
-static guint
-gst_signal_processor_prepare (GstSignalProcessor * self, guint nframes)
-{
-  GstElement *elem = (GstElement *) self;
-  GstSignalProcessorClass *klass;
-  GList *sinks, *srcs;
-  guint samples_avail = nframes;
-
-  klass = GST_SIGNAL_PROCESSOR_GET_CLASS (self);
-
-  /* first, assign audio_in pointers, and determine the number of samples that
-   * we can process */
-  for (sinks = elem->sinkpads; sinks; sinks = sinks->next) {
-    GstSignalProcessorPad *sinkpad;
-
-    sinkpad = (GstSignalProcessorPad *) sinks->data;
-    g_assert (sinkpad->samples_avail > 0);
-    samples_avail = MIN (samples_avail, sinkpad->samples_avail);
-    self->audio_in[sinkpad->index] = sinkpad->data;
-  }
-
-  /* FIXME: return if samples_avail==0 ? */
-
-  /* now assign output buffers. we can avoid allocation by reusing input
-     buffers, but only if process() can work in place, and if the input buffer
-     is the exact size of the number of samples we are processing. */
-  sinks = elem->sinkpads;
-  srcs = elem->srcpads;
-  if (GST_SIGNAL_PROCESSOR_CLASS_CAN_PROCESS_IN_PLACE (klass)) {
-    while (sinks && srcs) {
-      GstSignalProcessorPad *sinkpad, *srcpad;
-
-      sinkpad = (GstSignalProcessorPad *) sinks->data;
-      srcpad = (GstSignalProcessorPad *) srcs->data;
-
-      if (GST_BUFFER_SIZE (sinkpad->pen) == samples_avail * sizeof (gfloat)) {
-        /* reusable, yay */
-        g_assert (sinkpad->samples_avail == samples_avail);
-        srcpad->pen = sinkpad->pen;
-        sinkpad->pen = NULL;
-        self->audio_out[srcpad->index] = sinkpad->data;
-        self->pending_out++;
-
-        srcs = srcs->next;
-      }
-
-      sinks = sinks->next;
-    }
-  }
-
-  g_return_val_if_fail (GST_SIGNAL_PROCESSOR_IS_RUNNING (self), 0);
-
-  /* now allocate for any remaining outputs */
-  while (srcs) {
-    GstSignalProcessorPad *srcpad;
-    GstFlowReturn ret;
-
-    srcpad = (GstSignalProcessorPad *) srcs->data;
-
-    ret =
-        gst_pad_alloc_buffer_and_set_caps (GST_PAD (srcpad), -1,
-        samples_avail * sizeof (gfloat), self->caps, &srcpad->pen);
-
-    if (ret != GST_FLOW_OK) {
-      self->flow_state = ret;
-      return 0;
-    } else {
-      self->audio_out[srcpad->index] = (gfloat *) GST_BUFFER_DATA (srcpad->pen);
-      self->pending_out++;
-    }
-
-    srcs = srcs->next;
-  }
-
-  return samples_avail;
-}
-
-static void
-gst_signal_processor_update_inputs (GstSignalProcessor * self, guint nprocessed)
-{
-  GstElement *elem = (GstElement *) self;
-  GList *sinks;
-
-  for (sinks = elem->sinkpads; sinks; sinks = sinks->next) {
-    GstSignalProcessorPad *sinkpad;
-
-    sinkpad = (GstSignalProcessorPad *) sinks->data;
-    g_assert (sinkpad->samples_avail >= nprocessed);
-
-    if (sinkpad->pen && sinkpad->samples_avail == nprocessed) {
-      /* used up this buffer, unpen */
-      gst_buffer_unref (sinkpad->pen);
-      sinkpad->pen = NULL;
-    }
-
-    if (!sinkpad->pen) {
-      /* this buffer was used up */
-      self->pending_in++;
-      sinkpad->data = NULL;
-      sinkpad->samples_avail = 0;
-    } else {
-      /* advance ->data pointers and decrement ->samples_avail, unreffing buffer
-         if no samples are left */
-      sinkpad->samples_avail -= nprocessed;
-      sinkpad->data += nprocessed;      /* gfloat* arithmetic */
-    }
-  }
-}
-
-static void
-gst_signal_processor_process (GstSignalProcessor * self, guint nframes)
-{
-  GstElement *elem;
-  GstSignalProcessorClass *klass;
-
-  /* check if we have buffers enqueued */
-  g_return_if_fail (self->pending_in == 0);
-  g_return_if_fail (self->pending_out == 0);
-
-  elem = GST_ELEMENT (self);
-
-  /* check how much input is available and prepare output buffers */
-  nframes = gst_signal_processor_prepare (self, nframes);
-  if (G_UNLIKELY (nframes == 0))
-    goto flow_error;
-
-  klass = GST_SIGNAL_PROCESSOR_GET_CLASS (self);
-
-  GST_LOG_OBJECT (self, "process(%u)", nframes);
-
-  klass->process (self, nframes);
-
-  gst_signal_processor_update_inputs (self, nframes);
-
-  return;
-
-flow_error:
-  {
-    GST_WARNING ("gst_pad_alloc_buffer_and_set_caps() returned %d",
-        self->flow_state);
-    return;
-  }
-}
-
-static void
-gst_signal_processor_pen_buffer (GstSignalProcessor * self, GstPad * pad,
-    GstBuffer * buffer)
-{
-  GstSignalProcessorPad *spad = (GstSignalProcessorPad *) pad;
-
-  if (spad->pen)
-    goto had_buffer;
-
-  /* keep the reference */
-  spad->pen = buffer;
-  spad->data = (gfloat *) GST_BUFFER_DATA (buffer);
-  spad->samples_avail = GST_BUFFER_SIZE (buffer) / sizeof (float);
-
-  g_assert (self->pending_in != 0);
-
-  self->pending_in--;
-
-  return;
-
-  /* ERRORS */
-had_buffer:
-  {
-    GST_WARNING ("Pad %s:%s already has penned buffer",
-        GST_DEBUG_PAD_NAME (pad));
-    gst_buffer_unref (buffer);
-    return;
-  }
-}
-
-static void
-gst_signal_processor_flush (GstSignalProcessor * self)
-{
-  GList *pads;
-  GstSignalProcessorClass *klass;
-
-  klass = GST_SIGNAL_PROCESSOR_GET_CLASS (self);
-
-  GST_INFO_OBJECT (self, "flush()");
-
-  /* release enqueued buffers */
-  for (pads = GST_ELEMENT (self)->pads; pads; pads = pads->next) {
-    GstSignalProcessorPad *spad = (GstSignalProcessorPad *) pads->data;
-
-    if (spad->pen) {
-      gst_buffer_unref (spad->pen);
-      spad->pen = NULL;
-      spad->data = NULL;
-      spad->samples_avail = 0;
-    }
-  }
-
-  /* no outputs prepared and inputs for each pad needed */
-  self->pending_out = 0;
-  self->pending_in = klass->num_audio_in;
-}
-
-static void
-gst_signal_processor_do_pulls (GstSignalProcessor * self, guint nframes)
-{
-  GList *sinkpads;
-
-  /* FIXME: not threadsafe atm */
-
-  sinkpads = GST_ELEMENT (self)->sinkpads;
-
-  for (; sinkpads; sinkpads = sinkpads->next) {
-    GstSignalProcessorPad *spad = (GstSignalProcessorPad *) sinkpads->data;
-    GstFlowReturn ret = GST_FLOW_OK;
-    GstBuffer *buf;
-
-    if (spad->pen) {
-      g_warning ("Unexpectedly full buffer pen for pad %s:%s",
-          GST_DEBUG_PAD_NAME (spad));
-      continue;
-    }
-
-    ret =
-        gst_pad_pull_range (GST_PAD (spad), -1, nframes * sizeof (gfloat),
-        &buf);
-
-    if (ret != GST_FLOW_OK) {
-      gst_signal_processor_flush (self);
-      self->flow_state = ret;
-      return;
-    } else if (!buf) {
-      g_critical ("Pull failed to make a buffer!");
-      self->flow_state = GST_FLOW_ERROR;
-      return;
-    } else {
-      gst_signal_processor_pen_buffer (self, GST_PAD (spad), buf);
-    }
-  }
-
-  if (self->pending_in != 0) {
-    g_critical ("Something wierd happened...");
-    self->flow_state = GST_FLOW_ERROR;
-  } else {
-    gst_signal_processor_process (self, nframes);
-  }
-}
-
-static GstFlowReturn
-gst_signal_processor_getrange (GstPad * pad, guint64 offset,
-    guint length, GstBuffer ** buffer)
-{
-  GstSignalProcessor *self;
-  GstSignalProcessorPad *spad = (GstSignalProcessorPad *) pad;
-  GstFlowReturn ret = GST_FLOW_ERROR;
-
-  self = GST_SIGNAL_PROCESSOR (gst_pad_get_parent (pad));
-
-  if (spad->pen) {
-    *buffer = spad->pen;
-    spad->pen = NULL;
-    g_assert (self->pending_out != 0);
-    self->pending_out--;
-    ret = GST_FLOW_OK;
-  } else {
-    gst_signal_processor_do_pulls (self, length / sizeof (gfloat));
-    if (!spad->pen) {
-      /* this is an error condition */
-      *buffer = NULL;
-      ret = self->flow_state;
-    } else {
-      *buffer = spad->pen;
-      spad->pen = NULL;
-      self->pending_out--;
-      ret = GST_FLOW_OK;
-    }
-  }
-
-  GST_DEBUG_OBJECT (self, "returns %s", gst_flow_get_name (ret));
-
-  gst_object_unref (self);
-
-  return ret;
-}
-
-static void
-gst_signal_processor_do_pushes (GstSignalProcessor * self)
-{
-  GList *srcpads;
-
-  /* not threadsafe atm */
-
-  srcpads = GST_ELEMENT (self)->srcpads;
-
-  for (; srcpads; srcpads = srcpads->next) {
-    GstSignalProcessorPad *spad = (GstSignalProcessorPad *) srcpads->data;
-    GstFlowReturn ret = GST_FLOW_OK;
-    GstBuffer *buffer;
-
-    if (!spad->pen) {
-      g_warning ("Unexpectedly empty buffer pen for pad %s:%s",
-          GST_DEBUG_PAD_NAME (spad));
-      continue;
-    }
-
-    /* take buffer from pen */
-    buffer = spad->pen;
-    spad->pen = NULL;
-
-    ret = gst_pad_push (GST_PAD (spad), buffer);
-
-    if (ret != GST_FLOW_OK) {
-      gst_signal_processor_flush (self);
-      self->flow_state = ret;
-      return;
-    } else {
-      g_assert (self->pending_out > 0);
-      self->pending_out--;
-    }
-  }
-
-  if (self->pending_out != 0) {
-    g_critical ("Something wierd happened...");
-    self->flow_state = GST_FLOW_ERROR;
-  }
-}
-
-static GstFlowReturn
-gst_signal_processor_chain (GstPad * pad, GstBuffer * buffer)
-{
-  GstSignalProcessor *self;
-
-  self = GST_SIGNAL_PROCESSOR (gst_pad_get_parent (pad));
-
-  gst_signal_processor_pen_buffer (self, pad, buffer);
-
-  if (self->pending_in == 0) {
-    gst_signal_processor_process (self, G_MAXUINT);
-
-    gst_signal_processor_do_pushes (self);
-  }
-
-  gst_object_unref (self);
-
-  return self->flow_state;
-}
-
-static gboolean
-gst_signal_processor_sink_activate_push (GstPad * pad, gboolean active)
-{
-  gboolean result = TRUE;
-  GstSignalProcessor *self;
-  GstSignalProcessorClass *bclass;
-
-  self = GST_SIGNAL_PROCESSOR (gst_pad_get_parent (pad));
-  bclass = GST_SIGNAL_PROCESSOR_GET_CLASS (self);
-
-  if (active) {
-    if (self->mode == GST_ACTIVATE_NONE) {
-      self->mode = GST_ACTIVATE_PUSH;
-      result = TRUE;
-    } else if (self->mode == GST_ACTIVATE_PUSH) {
-      result = TRUE;
-    } else {
-      g_warning ("foo");
-      result = FALSE;
-    }
-  } else {
-    if (self->mode == GST_ACTIVATE_NONE) {
-      result = TRUE;
-    } else if (self->mode == GST_ACTIVATE_PUSH) {
-      self->mode = GST_ACTIVATE_NONE;
-      result = TRUE;
-    } else {
-      g_warning ("foo");
-      result = FALSE;
-    }
-  }
-
-  GST_DEBUG_OBJECT (self, "result : %d", result);
-
-  gst_object_unref (self);
-
-  return result;
-}
-
-static gboolean
-gst_signal_processor_src_activate_pull (GstPad * pad, gboolean active)
-{
-  gboolean result = TRUE;
-  GstSignalProcessor *self;
-  GstSignalProcessorClass *bclass;
-
-  self = GST_SIGNAL_PROCESSOR (gst_pad_get_parent (pad));
-  bclass = GST_SIGNAL_PROCESSOR_GET_CLASS (self);
-
-  if (active) {
-    if (self->mode == GST_ACTIVATE_NONE) {
-      GList *l;
-
-      for (l = GST_ELEMENT (self)->sinkpads; l; l = l->next)
-        result &= gst_pad_activate_pull (pad, active);
-      if (result)
-        self->mode = GST_ACTIVATE_PULL;
-    } else if (self->mode == GST_ACTIVATE_PULL) {
-      result = TRUE;
-    } else {
-      g_warning ("foo");
-      result = FALSE;
-    }
-  } else {
-    if (self->mode == GST_ACTIVATE_NONE) {
-      result = TRUE;
-    } else if (self->mode == GST_ACTIVATE_PULL) {
-      GList *l;
-
-      for (l = GST_ELEMENT (self)->sinkpads; l; l = l->next)
-        result &= gst_pad_activate_pull (pad, active);
-      if (result)
-        self->mode = GST_ACTIVATE_NONE;
-      result = TRUE;
-    } else {
-      g_warning ("foo");
-      result = FALSE;
-    }
-  }
-
-  GST_DEBUG_OBJECT (self, "result : %d", result);
-
-  gst_object_unref (self);
-
-  return result;
-}
-
-static GstStateChangeReturn
-gst_signal_processor_change_state (GstElement * element,
-    GstStateChange transition)
-{
-  GstSignalProcessor *self;
-  GstStateChangeReturn result;
-
-  self = GST_SIGNAL_PROCESSOR (element);
-
-  switch (transition) {
-    case GST_STATE_CHANGE_NULL_TO_READY:
-      break;
-    case GST_STATE_CHANGE_READY_TO_PAUSED:
-      self->flow_state = GST_FLOW_OK;
-      break;
-    case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
-      break;
-    default:
-      break;
-  }
-
-  if ((result =
-          GST_ELEMENT_CLASS (parent_class)->change_state (element,
-              transition)) == GST_STATE_CHANGE_FAILURE)
-    goto failure;
-
-  switch (transition) {
-    case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
-      break;
-    case GST_STATE_CHANGE_PAUSED_TO_READY:
-      if (GST_SIGNAL_PROCESSOR_IS_RUNNING (self))
-        gst_signal_processor_stop (self);
-      gst_signal_processor_flush (self);
-      break;
-    case GST_STATE_CHANGE_READY_TO_NULL:
-      if (GST_SIGNAL_PROCESSOR_IS_INITIALIZED (self))
-        gst_signal_processor_cleanup (self);
-      break;
-    default:
-      break;
-  }
-
-  return result;
-
-  /* ERRORS */
-failure:
-  {
-    GST_DEBUG_OBJECT (element, "parent failed state change");
-    return result;
-  }
-}
diff --git a/ext/ladspa/gstsignalprocessor.h b/ext/ladspa/gstsignalprocessor.h
deleted file mode 100644
index d6f0d0b0..00000000
--- a/ext/ladspa/gstsignalprocessor.h
+++ /dev/null
@@ -1,124 +0,0 @@
-/* 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__ */