add missing files

Original commit message from CVS:
add missing files

2 files changed, 799 insertions, 0 deletions

diff --git a/ext/ladspa/gstsignalprocessor.c b/ext/ladspa/gstsignalprocessor.c
new file mode 100644
index 00000000..4b9bcb9d
--- /dev/null
+++ b/ext/ladspa/gstsignalprocessor.c
@@ -0,0 +1,704 @@
+/* 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.
+ */
+
+
+#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
+
+
+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;
+}
+
+void
+gst_signal_processor_class_add_pad_template (GstSignalProcessorClass * klass,
+    const gchar * name, GstPadDirection direction, guint index)
+{
+  GstPadTemplate *new;
+
+  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);
+
+  new = g_object_new (gst_signal_processor_pad_template_get_type (),
+      "name", name, NULL);
+
+  GST_PAD_TEMPLATE_NAME_TEMPLATE (new) = g_strdup (name);
+  GST_PAD_TEMPLATE_DIRECTION (new) = direction;
+  GST_PAD_TEMPLATE_PRESENCE (new) = GST_PAD_ALWAYS;
+  GST_PAD_TEMPLATE_CAPS (new) = gst_caps_copy (gst_static_caps_get
+      (&template_caps));
+  GST_SIGNAL_PROCESSOR_PAD_TEMPLATE (new)->index = index;
+
+  gst_element_class_add_pad_template (GST_ELEMENT_CLASS (klass), new);
+  gst_object_unref (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;
+
+  guint index;
+};
+
+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 void gst_signal_processor_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec);
+static void gst_signal_processor_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec);
+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 GstElementStateReturn gst_signal_processor_change_state (GstElement *
+    element);
+
+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);
+  gobject_class->set_property =
+      GST_DEBUG_FUNCPTR (gst_signal_processor_set_property);
+  gobject_class->get_property =
+      GST_DEBUG_FUNCPTR (gst_signal_processor_get_property);
+
+  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_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_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_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)
+{
+  GList *templates;
+
+  GST_DEBUG ("gst_signal_processor_init");
+
+  templates =
+      gst_element_class_get_pad_template_list (GST_ELEMENT_GET_CLASS (self));
+
+  while (templates) {
+    GstPadTemplate *templ = GST_PAD_TEMPLATE (templates->data);
+
+    gst_signal_processor_add_pad_from_template (self, templ);
+    templates = templates->next;
+  }
+}
+
+static void
+gst_signal_processor_finalize (GObject * object)
+{
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static gboolean
+gst_signal_processor_setcaps (GstPad * pad, GstCaps * caps)
+{
+  GstSignalProcessor *self;
+  GstSignalProcessorClass *klass;
+
+  self = GST_SIGNAL_PROCESSOR (GST_PAD_PARENT (pad));
+  klass = GST_SIGNAL_PROCESSOR_GET_CLASS (self);
+
+  if (caps != self->caps) {
+    GstStructure *s;
+    gint sample_rate, buffer_frames;
+
+    s = gst_caps_get_structure (caps, 0);
+    if (!gst_structure_get_int (s, "rate", &sample_rate))
+      return FALSE;
+    if (!gst_structure_get_int (s, "buffer-frames", &buffer_frames))
+      return FALSE;
+
+    if (!klass->setup (self, sample_rate, buffer_frames))
+      return FALSE;
+
+    self->sample_rate = sample_rate;
+    self->buffer_frames = buffer_frames;
+  }
+
+  /* FIXME: handle was_active, etc */
+
+  return TRUE;
+}
+
+static gboolean
+gst_signal_processor_event (GstPad * pad, GstEvent * event)
+{
+  GstSignalProcessor *self;
+  GstSignalProcessorClass *bclass;
+  gboolean ret = FALSE;
+  gboolean unlock;
+
+  self = GST_SIGNAL_PROCESSOR (GST_PAD_PARENT (pad));
+  bclass = GST_SIGNAL_PROCESSOR_GET_CLASS (self);
+
+  if (bclass->event)
+    bclass->event (self, event);
+
+  unlock = FALSE;
+
+  switch (GST_EVENT_TYPE (event)) {
+    case GST_EVENT_FLUSH_STOP:
+    case GST_EVENT_EOS:
+      GST_STREAM_LOCK (pad);
+      unlock = TRUE;
+      break;
+    default:
+      break;
+  }
+  ret = gst_pad_event_default (pad, event);
+  if (unlock)
+    GST_STREAM_UNLOCK (pad);
+
+  return ret;
+}
+
+static void
+gst_signal_processor_process (GstSignalProcessor * self)
+{
+  GstElement *elem;
+  GList *l1, *l2;
+  GstSignalProcessorClass *klass;
+
+  g_return_if_fail (self->pending_in == 0);
+  g_return_if_fail (self->pending_out == 0);
+
+  /* arrange the output buffers */
+  for (l1 = elem->sinkpads, l2 = elem->srcpads; l1 || l2;
+      l1 = l1->next, l2 = l2->next) {
+    GstSignalProcessorPad *srcpad, *sinkpad;
+
+    if (!l2) {
+      /* the output buffers have been covered, yay */
+      break;
+    } else if (!l1) {
+      /* need to alloc some output buffers */
+      for (; l2; l2 = l2->next) {
+        GstFlowReturn ret;
+
+        srcpad = (GstSignalProcessorPad *) l2->data;
+
+        ret = gst_pad_alloc_buffer (GST_PAD (srcpad), -1, self->buffer_frames,
+            GST_PAD_CAPS (srcpad), &srcpad->pen);
+
+        if (ret != GST_FLOW_OK) {
+          self->state = ret;
+          return;
+        } else {
+          self->audio_out[srcpad->index] =
+              (gfloat *) GST_BUFFER_DATA (srcpad->pen);
+          self->pending_out++;
+        }
+      }
+      break;
+    } else {
+      /* copy input to output */
+      sinkpad = (GstSignalProcessorPad *) l1->data;
+      srcpad = (GstSignalProcessorPad *) l2->data;
+
+      srcpad->pen = sinkpad->pen;
+      sinkpad->pen = NULL;
+      self->audio_out[srcpad->index] = (gfloat *) GST_BUFFER_DATA (srcpad->pen);
+      self->pending_out++;
+    }
+  }
+
+  klass = GST_SIGNAL_PROCESSOR_GET_CLASS (self);
+
+  klass->process (self, self->buffer_frames);
+
+  /* free unneeded input buffers */
+
+  for (l1 = elem->sinkpads; l1; l1 = l1->next) {
+    GstSignalProcessorPad *sinkpad = (GstSignalProcessorPad *) l1->data;
+
+    if (sinkpad->pen) {
+      gst_buffer_unref (sinkpad->pen);
+      sinkpad->pen = NULL;
+    }
+  }
+}
+
+static void
+gst_signal_processor_pen_buffer (GstSignalProcessor * self, GstPad * pad,
+    GstBuffer * buffer)
+{
+  GstSignalProcessorPad *spad = (GstSignalProcessorPad *) pad;
+
+  if (spad->pen) {
+    g_critical ("Pad %s:%s already has penned buffer",
+        GST_DEBUG_PAD_NAME (pad));
+    gst_buffer_unref (buffer);
+    return;
+  }
+
+  /* keep the reference */
+  spad->pen = buffer;
+  self->audio_in[spad->index] = (gfloat *) GST_BUFFER_DATA (buffer);
+
+  g_assert (self->pending_in != 0);
+
+  self->pending_in--;
+
+  if (self->pending_in == 0) {
+    gst_signal_processor_process (self);
+  }
+}
+
+static void
+gst_signal_processor_flush (GstSignalProcessor * self)
+{
+  GList *pads;
+
+  pads = GST_ELEMENT (self)->pads;
+
+  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;
+    }
+  }
+}
+
+static void
+gst_signal_processor_do_pulls (GstSignalProcessor * self)
+{
+  GList *sinkpads;
+
+  /* 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, self->buffer_frames, &buf);
+
+    if (ret != GST_FLOW_OK) {
+      self->state = ret;
+      gst_signal_processor_flush (self);
+      return;
+    } else if (!buf) {
+      g_critical ("Pull failed to make a buffer!");
+      self->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->state = GST_FLOW_ERROR;
+  } else {
+    gst_signal_processor_process (self);
+  }
+}
+
+static GstFlowReturn
+gst_signal_processor_getrange (GstPad * pad, guint64 offset,
+    guint length, GstBuffer ** buffer)
+{
+  GstSignalProcessor *self;
+  GstSignalProcessorPad *spad = (GstSignalProcessorPad *) pad;
+  GstFlowReturn ret;
+
+  self = GST_SIGNAL_PROCESSOR (GST_PAD_PARENT (pad));
+
+  GST_STREAM_LOCK (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);
+    if (!spad->pen) {
+      *buffer = NULL;
+      ret = self->state;
+    } else {
+      *buffer = spad->pen;
+      spad->pen = NULL;
+      self->pending_out--;
+      ret = GST_FLOW_OK;
+    }
+  }
+
+  GST_STREAM_UNLOCK (pad);
+
+  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;
+
+    if (!spad->pen) {
+      g_warning ("Unexpectedly empty buffer pen for pad %s:%s",
+          GST_DEBUG_PAD_NAME (spad));
+      continue;
+    }
+
+    ret = gst_pad_push (GST_PAD (spad), spad->pen);
+
+    if (ret != GST_FLOW_OK) {
+      self->state = ret;
+      gst_signal_processor_flush (self);
+      return;
+    } else {
+      spad->pen = NULL;
+      g_assert (self->pending_out > 0);
+      self->pending_out--;
+    }
+  }
+
+  if (self->pending_out != 0) {
+    g_critical ("Something wierd happened...");
+    self->state = GST_FLOW_ERROR;
+  }
+}
+
+static GstFlowReturn
+gst_signal_processor_chain (GstPad * pad, GstBuffer * buffer)
+{
+  GstSignalProcessor *self;
+
+  self = GST_SIGNAL_PROCESSOR (GST_PAD_PARENT (pad));
+
+  GST_STREAM_LOCK (pad);
+
+  gst_signal_processor_pen_buffer (self, pad, buffer);
+
+  if (self->pending_in == 0) {
+    gst_signal_processor_process (self);
+
+    gst_signal_processor_do_pushes (self);
+  }
+
+  GST_STREAM_UNLOCK (pad);
+
+  return self->state;
+}
+
+static void
+gst_signal_processor_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  /* GstSignalProcessor *self = GST_SIGNAL_PROCESSOR (object); */
+
+  switch (prop_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_signal_processor_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec)
+{
+  /* GstSignalProcessor *self = GST_SIGNAL_PROCESSOR (object); */
+
+  switch (prop_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static gboolean
+gst_signal_processor_sink_activate_push (GstPad * pad, gboolean active)
+{
+  gboolean result = TRUE;
+  GstSignalProcessor *self;
+  GstSignalProcessorClass *bclass;
+
+  self = GST_SIGNAL_PROCESSOR (GST_OBJECT_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;
+    }
+  }
+
+  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_OBJECT_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;
+    }
+  }
+
+  return result;
+}
+
+static GstElementStateReturn
+gst_signal_processor_change_state (GstElement * element)
+{
+  GstSignalProcessor *self;
+  GstSignalProcessorClass *klass;
+  GstElementState transition;
+  GstElementStateReturn result;
+
+  self = GST_SIGNAL_PROCESSOR (element);
+  klass = GST_SIGNAL_PROCESSOR_GET_CLASS (self);
+
+  transition = GST_STATE_TRANSITION (element);
+
+  switch (transition) {
+    case GST_STATE_NULL_TO_READY:
+      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);
+      break;
+    case GST_STATE_READY_TO_PAUSED:
+      break;
+    case GST_STATE_PAUSED_TO_PLAYING:
+      break;
+    default:
+      break;
+  }
+
+  result = GST_ELEMENT_CLASS (parent_class)->change_state (element);
+
+  switch (transition) {
+    case GST_STATE_PLAYING_TO_PAUSED:
+      break;
+    case GST_STATE_PAUSED_TO_READY:
+      break;
+    case GST_STATE_READY_TO_NULL:
+      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;
+      break;
+    default:
+      break;
+  }
+
+  return result;
+}
diff --git a/ext/ladspa/gstsignalprocessor.h b/ext/ladspa/gstsignalprocessor.h
new file mode 100644
index 00000000..fec8a7cd
--- /dev/null
+++ b/ext/ladspa/gstsignalprocessor.h
@@ -0,0 +1,95 @@
+/* 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
+
+
+#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(obj)(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_SIGNAL_PROCESSOR))
+
+
+typedef struct _GstSignalProcessor GstSignalProcessor;
+typedef struct _GstSignalProcessorClass GstSignalProcessorClass;
+
+
+struct _GstSignalProcessor {
+  GstElement	 element;
+
+  GstCaps *caps;
+
+  guint sample_rate;
+  guint buffer_frames;
+
+  GstFlowReturn state;
+
+  GstActivateMode mode;
+
+  guint pending_in;
+  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;
+
+  /* virtual methods for subclasses */
+
+  gboolean	(*setup)        (GstSignalProcessor *self, guint sample_rate,
+                                 guint buffer_frames);
+  gboolean      (*start)        (GstSignalProcessor *self);
+  gboolean      (*stop)         (GstSignalProcessor *self);
+  gboolean      (*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__ */