gst/deinterlace2/: Add a deinterlacer plugin based on the tvtime/DScaler deinterlacer, which was relicensed to LGPL f...

Original commit message from CVS:
Based on a patch by: Martin Eikermann <meiker at upb dot de>
* gst/deinterlace2/Makefile.am:
* gst/deinterlace2/gstdeinterlace2.c:
(gst_deinterlace2_method_get_type),
(gst_deinterlace2_fields_get_type),
(gst_deinterlace2_field_layout_get_type),
(gst_deinterlace2_base_init), (gst_deinterlace2_class_init),
(gst_deinterlace2_init), (gst_deinterlace2_set_method),
(gst_deinterlace2_set_property), (gst_deinterlace2_get_property),
(gst_deinterlace2_finalize), (gst_deinterlace2_pop_history),
(gst_deinterlace2_head_history), (gst_deinterlace2_push_history),
(gst_deinterlace2_deinterlace_scanlines), (gst_deinterlace2_chain),
(gst_deinterlace2_setcaps), (gst_deinterlace2_sink_event),
(gst_deinterlace2_change_state), (gst_deinterlace2_src_event),
(gst_deinterlace2_src_query), (gst_deinterlace2_src_query_types),
(plugin_init):
* gst/deinterlace2/gstdeinterlace2.h:
* gst/deinterlace2/tvtime/greedy.c: (copy_scanline),
(deinterlace_greedy_packed422_scanline_mmxext),
(dscaler_greedyl_get_method):
* gst/deinterlace2/tvtime/greedyh.asm:
* gst/deinterlace2/tvtime/greedyh.c:
(deinterlace_frame_di_greedyh), (dscaler_greedyh_get_method),
(greedyh_init), (greedyh_filter_mmx), (greedyh_filter_3dnow),
(greedyh_filter_sse):
* gst/deinterlace2/tvtime/greedyh.h:
* gst/deinterlace2/tvtime/greedyhmacros.h:
* gst/deinterlace2/tvtime/mmx.h:
* gst/deinterlace2/tvtime/plugins.h:
* gst/deinterlace2/tvtime/speedtools.h:
* gst/deinterlace2/tvtime/speedy.c: (multiply_alpha), (clip255),
(comb_factor_packed422_scanline_mmx),
(diff_factor_packed422_scanline_c),
(diff_factor_packed422_scanline_mmx),
(diff_packed422_block8x8_mmx), (diff_packed422_block8x8_c),
(packed444_to_packed422_scanline_c),
(packed422_to_packed444_scanline_c),
(packed422_to_packed444_rec601_scanline_c),
(vfilter_chroma_121_packed422_scanline_mmx),
(vfilter_chroma_121_packed422_scanline_c),
(vfilter_chroma_332_packed422_scanline_mmx),
(vfilter_chroma_332_packed422_scanline_c),
(kill_chroma_packed422_inplace_scanline_mmx),
(kill_chroma_packed422_inplace_scanline_c),
(invert_colour_packed422_inplace_scanline_mmx),
(invert_colour_packed422_inplace_scanline_c),
(mirror_packed422_inplace_scanline_c),
(interpolate_packed422_scanline_c),
(convert_uyvy_to_yuyv_scanline_mmx),
(convert_uyvy_to_yuyv_scanline_c),
(interpolate_packed422_scanline_mmx),
(interpolate_packed422_scanline_mmxext),
(blit_colour_packed422_scanline_c),
(blit_colour_packed422_scanline_mmx),
(blit_colour_packed422_scanline_mmxext),
(blit_colour_packed4444_scanline_c),
(blit_colour_packed4444_scanline_mmx),
(blit_colour_packed4444_scanline_mmxext), (small_memcpy),
(speedy_memcpy_c), (speedy_memcpy_mmx), (speedy_memcpy_mmxext),
(blit_packed422_scanline_c), (blit_packed422_scanline_mmx),
(blit_packed422_scanline_mmxext),
(composite_colour4444_alpha_to_packed422_scanline_c),
(composite_colour4444_alpha_to_packed422_scanline_mmxext),
(composite_packed4444_alpha_to_packed422_scanline_c),
(composite_packed4444_alpha_to_packed422_scanline_mmxext),
(composite_packed4444_to_packed422_scanline_c),
(composite_packed4444_to_packed422_scanline_mmxext),
(composite_alphamask_to_packed4444_scanline_c),
(composite_alphamask_to_packed4444_scanline_mmxext),
(composite_alphamask_alpha_to_packed4444_scanline_c),
(premultiply_packed4444_scanline_c),
(premultiply_packed4444_scanline_mmxext),
(blend_packed422_scanline_c), (blend_packed422_scanline_mmxext),
(quarter_blit_vertical_packed422_scanline_mmxext),
(quarter_blit_vertical_packed422_scanline_c),
(subpix_blit_vertical_packed422_scanline_c),
(a8_subpix_blit_scanline_c), (myround), (init_RGB_to_YCbCr_tables),
(init_YCbCr_to_RGB_tables), (rgb24_to_packed444_rec601_scanline_c),
(rgba32_to_packed4444_rec601_scanline_c),
(packed444_to_rgb24_rec601_scanline_c),
(packed444_to_nonpremultiplied_packed4444_scanline_c),
(aspect_adjust_packed4444_scanline_c), (setup_speedy_calls),
(speedy_get_accel):
* gst/deinterlace2/tvtime/speedy.h:
* gst/deinterlace2/tvtime/sse.h:
* gst/deinterlace2/tvtime/tomsmocomp.c: (Fieldcopy),
(deinterlace_frame_di_tomsmocomp), (dscaler_tomsmocomp_get_method),
(tomsmocomp_init), (tomsmocomp_filter_mmx),
(tomsmocomp_filter_3dnow), (tomsmocomp_filter_sse):
* gst/deinterlace2/tvtime/tomsmocomp.h:
* gst/deinterlace2/tvtime/tomsmocomp/SearchLoop0A.inc:
* gst/deinterlace2/tvtime/tomsmocomp/SearchLoopBottom.inc:
* gst/deinterlace2/tvtime/tomsmocomp/SearchLoopEdgeA.inc:
* gst/deinterlace2/tvtime/tomsmocomp/SearchLoopEdgeA8.inc:
* gst/deinterlace2/tvtime/tomsmocomp/SearchLoopOddA.inc:
* gst/deinterlace2/tvtime/tomsmocomp/SearchLoopOddA2.inc:
* gst/deinterlace2/tvtime/tomsmocomp/SearchLoopOddA6.inc:
* gst/deinterlace2/tvtime/tomsmocomp/SearchLoopOddAH.inc:
* gst/deinterlace2/tvtime/tomsmocomp/SearchLoopOddAH2.inc:
* gst/deinterlace2/tvtime/tomsmocomp/SearchLoopTop.inc:
* gst/deinterlace2/tvtime/tomsmocomp/SearchLoopVA.inc:
* gst/deinterlace2/tvtime/tomsmocomp/SearchLoopVAH.inc:
* gst/deinterlace2/tvtime/tomsmocomp/StrangeBob.inc:
* gst/deinterlace2/tvtime/tomsmocomp/TomsMoCompAll.inc:
* gst/deinterlace2/tvtime/tomsmocomp/TomsMoCompAll2.inc:
* gst/deinterlace2/tvtime/tomsmocomp/WierdBob.inc:
* gst/deinterlace2/tvtime/vfir.c: (deinterlace_line),
(deinterlace_scanline_vfir), (copy_scanline),
(dscaler_vfir_get_method):
* gst/deinterlace2/tvtime/x86-64_macros.inc:
Add a deinterlacer plugin based on the tvtime/DScaler deinterlacer,
which was relicensed to LGPL for GStreamer and in theory provides
better and faster results than the simple deinterlace element.
Fixes bug #163578.
Ported to GStreamer 0.10 but still not enabled or included in the
build system by default because of bad artefacts caused by a bug
somewhere and as it can be only build on x86/amd64 ATM and requires
special CFLAGS. Will be fixed soon.

1 files changed, 893 insertions, 0 deletions

diff --git a/gst/deinterlace2/gstdeinterlace2.c b/gst/deinterlace2/gstdeinterlace2.c
new file mode 100644
index 00000000..450a31c9
--- /dev/null
+++ b/gst/deinterlace2/gstdeinterlace2.c
@@ -0,0 +1,893 @@
+/*
+ * GStreamer
+ * Copyright (C) 2005 Martin Eikermann <meiker@upb.de>
+ * Copyright (C) 2008 Sebastian Dröge <slomo@circular-chaos.org>
+ *
+ * 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 "gstdeinterlace2.h"
+#include <gst/gst.h>
+#include <gst/video/video.h>
+
+#include "tvtime/plugins.h"
+#include "tvtime/speedy.h"
+
+GST_DEBUG_CATEGORY_STATIC (deinterlace2_debug);
+#define GST_CAT_DEFAULT (deinterlace2_debug)
+
+/* Object signals and args */
+enum
+{
+  LAST_SIGNAL
+};
+
+/* Arguments */
+enum
+{
+  ARG_0,
+  ARG_METHOD,
+  ARG_FIELDS,
+  ARG_FIELD_LAYOUT
+};
+
+#define GST_TYPE_DEINTERLACE2_METHOD (gst_deinterlace2_method_get_type ())
+static GType
+gst_deinterlace2_method_get_type (void)
+{
+  static GType deinterlace2_method_type = 0;
+
+  static const GEnumValue method_types[] = {
+    {GST_DEINTERLACE2_TOM, "Toms Motion Compensation", "tomsmc"},
+    {GST_DEINTERLACE2_GREEDY_H, "Greedy High Motion", "greedyh"},
+    {GST_DEINTERLACE2_GREEDY_L, "Greedy Low Motion", "greedyl"},
+    {GST_DEINTERLACE2_VFIR, "Vertical Blur", "vfir"},
+    {0, NULL, NULL},
+  };
+
+  if (!deinterlace2_method_type) {
+    deinterlace2_method_type =
+        g_enum_register_static ("GstDeinterlace2Methods", method_types);
+  }
+  return deinterlace2_method_type;
+}
+
+#define GST_TYPE_DEINTERLACE2_FIELDS (gst_deinterlace2_fields_get_type ())
+static GType
+gst_deinterlace2_fields_get_type (void)
+{
+  static GType deinterlace2_fields_type = 0;
+
+  static const GEnumValue fields_types[] = {
+    {GST_DEINTERLACE2_ALL, "All fields", "all"},
+    {GST_DEINTERLACE2_TF, "Top fields only", "top"},
+    {GST_DEINTERLACE2_BF, "Bottom fields only", "bottom"},
+    {0, NULL, NULL},
+  };
+
+  if (!deinterlace2_fields_type) {
+    deinterlace2_fields_type =
+        g_enum_register_static ("GstDeinterlace2Fields", fields_types);
+  }
+  return deinterlace2_fields_type;
+}
+
+#define GST_TYPE_DEINTERLACE2_FIELD_LAYOUT (gst_deinterlace2_field_layout_get_type ())
+static GType
+gst_deinterlace2_field_layout_get_type (void)
+{
+  static GType deinterlace2_field_layout_type = 0;
+
+  static const GEnumValue field_layout_types[] = {
+    {GST_DEINTERLACE2_LAYOUT_AUTO, "Auto detection", "auto"},
+    {GST_DEINTERLACE2_LAYOUT_TFF, "Top field first", "tff"},
+    {GST_DEINTERLACE2_LAYOUT_BFF, "Bottom field first", "bff"},
+    {0, NULL, NULL},
+  };
+
+  if (!deinterlace2_field_layout_type) {
+    deinterlace2_field_layout_type =
+        g_enum_register_static ("GstDeinterlace2FieldLayout",
+        field_layout_types);
+  }
+  return deinterlace2_field_layout_type;
+}
+
+static GstStaticPadTemplate src_templ = GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("YUY2"))
+    );
+
+static GstStaticPadTemplate sink_templ = GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("YUY2"))
+    );
+
+static void gst_deinterlace2_finalize (GObject * object);
+
+static void gst_deinterlace2_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec);
+static void gst_deinterlace2_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec);
+
+static gboolean gst_deinterlace2_setcaps (GstPad * pad, GstCaps * caps);
+
+static gboolean gst_deinterlace2_sink_event (GstPad * pad, GstEvent * event);
+
+static GstFlowReturn gst_deinterlace2_chain (GstPad * pad, GstBuffer * buffer);
+
+static GstStateChangeReturn gst_deinterlace2_change_state (GstElement * element,
+    GstStateChange transition);
+
+static gboolean gst_deinterlace2_src_event (GstPad * pad, GstEvent * event);
+
+static gboolean gst_deinterlace2_src_query (GstPad * pad, GstQuery * query);
+
+static const GstQueryType *gst_deinterlace2_src_query_types (GstPad * pad);
+
+static void gst_deinterlace2_deinterlace_scanlines (GstDeinterlace2 * object);
+
+GST_BOILERPLATE (GstDeinterlace2, gst_deinterlace2, GstElement,
+    GST_TYPE_ELEMENT);
+
+static void
+gst_deinterlace2_base_init (gpointer klass)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&src_templ));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&sink_templ));
+
+  gst_element_class_set_details_simple (element_class,
+      "Deinterlacer",
+      "Filter/Video",
+      "Deinterlace Methods ported from DScaler/TvTime",
+      "Martin Eikermann <meiker@upb.de>, "
+      "Sebastian Dröge <slomo@circular-chaos.org>");
+}
+
+static void
+gst_deinterlace2_class_init (GstDeinterlace2Class * klass)
+{
+  GObjectClass *gobject_class = (GObjectClass *) klass;
+
+  GstElementClass *element_class = (GstElementClass *) klass;
+
+  gobject_class->set_property = gst_deinterlace2_set_property;
+  gobject_class->get_property = gst_deinterlace2_get_property;
+  gobject_class->finalize = gst_deinterlace2_finalize;
+
+  g_object_class_install_property (gobject_class, ARG_METHOD,
+      g_param_spec_enum ("method",
+          "Method",
+          "Deinterlace Method",
+          GST_TYPE_DEINTERLACE2_METHOD,
+          GST_DEINTERLACE2_GREEDY_H, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)
+      );
+
+  g_object_class_install_property (gobject_class, ARG_FIELDS,
+      g_param_spec_enum ("fields",
+          "fields",
+          "Fields to use for deinterlacing",
+          GST_TYPE_DEINTERLACE2_FIELDS,
+          GST_DEINTERLACE2_ALL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)
+      );
+
+
+  g_object_class_install_property (gobject_class, ARG_FIELDS,
+      g_param_spec_enum ("tff",
+          "tff",
+          "Deinterlace top field first",
+          GST_TYPE_DEINTERLACE2_FIELD_LAYOUT,
+          GST_DEINTERLACE2_LAYOUT_AUTO,
+          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)
+      );
+
+  element_class->change_state =
+      GST_DEBUG_FUNCPTR (gst_deinterlace2_change_state);
+}
+
+static void
+gst_deinterlace2_init (GstDeinterlace2 * object, GstDeinterlace2Class * klass)
+{
+  object->sinkpad = gst_pad_new_from_static_template (&sink_templ, "sink");
+  gst_pad_set_chain_function (object->sinkpad,
+      GST_DEBUG_FUNCPTR (gst_deinterlace2_chain));
+  gst_pad_set_event_function (object->sinkpad,
+      GST_DEBUG_FUNCPTR (gst_deinterlace2_sink_event));
+  gst_pad_set_setcaps_function (object->sinkpad,
+      GST_DEBUG_FUNCPTR (gst_deinterlace2_setcaps));
+  gst_pad_set_getcaps_function (object->sinkpad,
+      GST_DEBUG_FUNCPTR (gst_pad_proxy_getcaps));
+  gst_element_add_pad (GST_ELEMENT (object), object->sinkpad);
+
+  object->srcpad = gst_pad_new_from_static_template (&src_templ, "src");
+  gst_pad_set_event_function (object->srcpad,
+      GST_DEBUG_FUNCPTR (gst_deinterlace2_src_event));
+  gst_pad_set_query_type_function (object->srcpad,
+      GST_DEBUG_FUNCPTR (gst_deinterlace2_src_query_types));
+  gst_pad_set_query_function (object->srcpad,
+      GST_DEBUG_FUNCPTR (gst_deinterlace2_src_query));
+  gst_pad_set_setcaps_function (object->srcpad,
+      GST_DEBUG_FUNCPTR (gst_deinterlace2_setcaps));
+  gst_pad_set_getcaps_function (object->srcpad,
+      GST_DEBUG_FUNCPTR (gst_pad_proxy_getcaps));
+  gst_element_add_pad (GST_ELEMENT (object), object->srcpad);
+
+  gst_element_no_more_pads (GST_ELEMENT (object));
+
+  object->cpu_feature_flags = oil_cpu_get_flags ();
+
+  setup_speedy_calls (object->cpu_feature_flags, 0);
+  object->pMemcpy = speedy_memcpy;
+
+  object->method = dscaler_tomsmocomp_get_method ();
+
+  object->history_count = 0;
+
+  object->field_layout = GST_DEINTERLACE2_LAYOUT_AUTO;
+
+  object->out_buf = NULL;
+  object->output_stride = 0;
+  object->line_length = 0;
+  object->frame_width = 0;
+  object->frame_height = 0;
+  object->field_height = 0;
+  object->field_stride = 0;
+
+  object->fields = GST_DEINTERLACE2_ALL;
+
+  object->bottom_field = TRUE;
+}
+
+static void
+gst_deinterlace2_set_method (GstDeinterlace2 * object,
+    GstDeinterlace2Methods method)
+{
+
+  switch (method) {
+    case GST_DEINTERLACE2_TOM:
+      object->method_id = method;
+      object->method = dscaler_tomsmocomp_get_method ();
+      break;
+    case GST_DEINTERLACE2_GREEDY_H:
+      object->method_id = method;
+      object->method = dscaler_greedyh_get_method ();
+      break;
+    case GST_DEINTERLACE2_GREEDY_L:
+      object->method_id = method;
+      object->method = dscaler_greedyl_get_method ();
+      break;
+    case GST_DEINTERLACE2_VFIR:
+      object->method_id = method;
+      object->method = dscaler_vfir_get_method ();
+      break;
+    default:
+      GST_WARNING ("Invalid Deinterlacer Method");
+  }
+
+
+  if (object->method->deinterlace_frame == NULL)
+    object->method->deinterlace_frame = gst_deinterlace2_deinterlace_scanlines;
+
+  /* TODO: if current method requires less fields in the history,
+     pop the diff from field_history.
+   */
+
+}
+
+static void
+gst_deinterlace2_set_property (GObject * _object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstDeinterlace2 *object;
+
+  g_return_if_fail (GST_IS_DEINTERLACE2 (_object));
+  object = GST_DEINTERLACE2 (_object);
+
+  switch (prop_id) {
+    case ARG_METHOD:
+      gst_deinterlace2_set_method (object, g_value_get_enum (value));
+      break;
+    case ARG_FIELDS:
+      object->fields = g_value_get_enum (value);
+      break;
+    case ARG_FIELD_LAYOUT:
+      object->field_layout = g_value_get_enum (value);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+  }
+
+}
+
+static void
+gst_deinterlace2_get_property (GObject * _object, guint prop_id,
+    GValue * value, GParamSpec * pspec)
+{
+  GstDeinterlace2 *object;
+
+  g_return_if_fail (GST_IS_DEINTERLACE2 (_object));
+  object = GST_DEINTERLACE2 (_object);
+
+  switch (prop_id) {
+    case ARG_METHOD:
+      g_value_set_enum (value, object->method_id);
+      break;
+    case ARG_FIELDS:
+      g_value_set_enum (value, object->fields);
+      break;
+    case ARG_FIELD_LAYOUT:
+      g_value_set_enum (value, object->field_layout);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+  }
+}
+
+static void
+gst_deinterlace2_finalize (GObject * object)
+{
+  G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+static GstBuffer *
+gst_deinterlace2_pop_history (GstDeinterlace2 * object)
+{
+  GstBuffer *buffer = NULL;
+
+  g_assert (object->history_count > 0);
+
+  buffer = object->field_history[object->history_count - 1].buf;
+
+  object->history_count--;
+  GST_DEBUG ("pop, size(history): %d", object->history_count);
+
+  return buffer;
+}
+
+#if 0
+static GstBuffer *
+gst_deinterlace2_head_history (GstDeinterlace2 * object)
+{
+  return object->field_history[object->history_count - 1].buf;
+}
+#endif
+
+
+/* invariant: field with smallest timestamp is object->field_history[object->history_count-1]
+
+*/
+
+static void
+gst_deinterlace2_push_history (GstDeinterlace2 * object, GstBuffer * buffer)
+{
+  int i = 1;
+
+  GstClockTime timestamp;
+
+  GstClockTime field_diff;
+
+  g_assert (object->history_count < MAX_FIELD_HISTORY - 2);
+
+  for (i = MAX_FIELD_HISTORY - 1; i >= 2; i--) {
+    object->field_history[i].buf = object->field_history[i - 2].buf;
+    object->field_history[i].flags = object->field_history[i - 2].flags;
+  }
+
+  if (object->field_layout == GST_DEINTERLACE2_LAYOUT_AUTO) {
+    GST_WARNING ("Could not detect field layout. Assuming top field first.");
+    object->field_layout = GST_DEINTERLACE2_LAYOUT_TFF;
+  }
+
+
+  if (object->field_layout == GST_DEINTERLACE2_LAYOUT_TFF) {
+    GST_DEBUG ("Top field first");
+    object->field_history[0].buf =
+        gst_buffer_create_sub (buffer, object->line_length,
+        GST_BUFFER_SIZE (buffer) - object->line_length);
+    object->field_history[0].flags = PICTURE_INTERLACED_BOTTOM;
+    object->field_history[1].buf = buffer;
+    object->field_history[1].flags = PICTURE_INTERLACED_TOP;
+  } else {
+    GST_DEBUG ("Bottom field first");
+    object->field_history[0].buf = buffer;
+    object->field_history[0].flags = PICTURE_INTERLACED_TOP;
+    object->field_history[1].buf =
+        gst_buffer_create_sub (buffer, object->line_length,
+        GST_BUFFER_SIZE (buffer) - object->line_length);
+    object->field_history[1].flags = PICTURE_INTERLACED_BOTTOM;
+  }
+
+  /* Timestamps are assigned to the field buffers under the assumption that
+     the timestamp of the buffer equals the first fields timestamp */
+
+  timestamp = GST_BUFFER_TIMESTAMP (buffer);
+  field_diff = GST_SECOND / (object->frame_rate_d * 2) / object->frame_rate_n;
+  GST_BUFFER_TIMESTAMP (object->field_history[0].buf) = timestamp + field_diff;
+  GST_BUFFER_TIMESTAMP (object->field_history[1].buf) = timestamp;
+
+  object->history_count += 2;
+  GST_DEBUG ("push, size(history): %d", object->history_count);
+}
+
+/* some methods support only deinterlace_/copy_scanline functions.
+   This funtion calls them in the right manner. */
+static void
+gst_deinterlace2_deinterlace_scanlines (GstDeinterlace2 * object)
+{
+
+  gint line = 1;
+
+  gint cur_field_idx = object->history_count - object->method->fields_required;
+
+  GST_INFO ("cur_field_idx: %d", cur_field_idx);
+
+  guint8 *out_data = GST_BUFFER_DATA (object->out_buf);
+
+  guint8 *cur_field =
+      GST_BUFFER_DATA (object->field_history[cur_field_idx].buf);
+  guint8 *last_field = NULL;
+
+  guint8 *second_last_field = NULL;
+
+  /* method can just handle up to 3 history fields, 
+     bcs until now there isn't a plugin (with interp./copy scanline methods)
+     that uses more */
+  g_assert (object->method->fields_required <= 3);
+
+  if (object->method->fields_required >= 2) {
+    last_field = GST_BUFFER_DATA (object->field_history[cur_field_idx + 1].buf);
+  }
+  if (object->method->fields_required >= 3) {
+    second_last_field =
+        GST_BUFFER_DATA (object->field_history[cur_field_idx + 2].buf);
+  }
+
+  if (object->field_history[cur_field_idx].flags == PICTURE_INTERLACED_BOTTOM) {
+    /* double the first scanline of the bottom field */
+    blit_packed422_scanline (out_data, cur_field, object->frame_width);
+    out_data += object->output_stride;
+  }
+
+  blit_packed422_scanline (out_data, cur_field, object->frame_width);
+  out_data += object->output_stride;
+  line++;
+
+  for (; line <= object->field_height;) {
+    deinterlace_scanline_data_t data;
+
+    /* interp. scanline */
+    data.t0 = cur_field;
+    data.b0 = cur_field + object->field_stride;
+
+    if (last_field != NULL) {
+      data.tt1 = last_field;
+      data.m1 = last_field + object->field_stride;
+      data.bb1 = last_field + (object->field_stride * 2);
+
+      last_field += object->field_stride;
+    }
+
+    if (second_last_field != NULL) {
+      data.t2 = second_last_field;
+      data.b2 = second_last_field + object->field_stride;
+    }
+
+    /* set valid data for corner cases */
+    if (line == 2) {
+      data.tt1 = data.bb1;
+    } else if (line == object->field_height) {
+      data.bb1 = data.tt1;
+    }
+
+    object->method->interpolate_scanline (object, &data, out_data);
+    out_data += object->output_stride;
+
+    /* copy a scanline */
+    data.tt0 = cur_field;
+    data.m0 = cur_field + (object->field_stride);
+    data.bb0 = cur_field + (object->field_stride * 2);
+    cur_field += object->field_stride;
+
+    if (last_field != NULL) {
+      data.t1 = last_field;
+      data.b1 = last_field + object->field_stride;
+    }
+
+    if (second_last_field != NULL) {
+      data.tt2 = second_last_field;
+      data.m2 = second_last_field + (object->field_stride);
+      data.bb2 = second_last_field + (object->field_stride * 2);
+      second_last_field += object->field_stride;
+    }
+
+    /* set valid data for corner cases */
+    if (line == object->field_height) {
+      data.bb0 = data.tt0;
+      data.bb2 = data.tt2;
+      data.b1 = data.t1;
+    }
+
+    object->method->copy_scanline (object, &data, out_data);
+    out_data += object->output_stride;
+    line++;
+  }
+
+  if (object->field_history[cur_field_idx].flags == PICTURE_INTERLACED_TOP) {
+    /* double the last scanline of the top field */
+    blit_packed422_scanline (out_data, cur_field, object->frame_width);
+  }
+}
+
+static GstFlowReturn
+gst_deinterlace2_chain (GstPad * pad, GstBuffer * buf)
+{
+  //GstBuffer *out_buf = NULL;
+  GstDeinterlace2 *object = NULL;
+
+  GstClockTime timestamp;
+
+  //GstFlowReturn ret = GST_FLOW_OK;
+
+  object = GST_DEINTERLACE2 (GST_PAD_PARENT (pad));
+
+  gst_deinterlace2_push_history (object, buf);
+  buf = NULL;
+
+  if (object->method != NULL) {
+    int cur_field_idx = 0;
+
+    /* Not enough fields in the history */
+    if (object->history_count < object->method->fields_required + 1) {
+      /* TODO: do bob or just forward frame */
+      GST_DEBUG ("HistoryCount=%d", object->history_count);
+      return GST_FLOW_OK;
+    }
+
+    if (object->fields == GST_DEINTERLACE2_ALL)
+      GST_DEBUG ("All fields");
+    if (object->fields == GST_DEINTERLACE2_TF)
+      GST_DEBUG ("Top fields");
+    if (object->fields == GST_DEINTERLACE2_BF)
+      GST_DEBUG ("Bottom fields");
+
+    cur_field_idx = object->history_count - object->method->fields_required;
+
+    if ((object->field_history[cur_field_idx].flags == PICTURE_INTERLACED_TOP
+            && object->fields == GST_DEINTERLACE2_TF) ||
+        object->fields == GST_DEINTERLACE2_ALL) {
+      GST_DEBUG ("deinterlacing top field");
+
+      /* create new buffer */
+      object->out_buf = gst_buffer_new_and_alloc (object->frame_size);
+      gst_buffer_set_caps (object->out_buf, GST_PAD_CAPS (object->srcpad));
+
+      /* do magic calculus */
+      if (object->method->deinterlace_frame != NULL) {
+        object->method->deinterlace_frame (object);
+
+        buf = gst_deinterlace2_pop_history (object);
+        timestamp = GST_BUFFER_TIMESTAMP (buf);
+        gst_buffer_unref (buf);
+
+        GST_BUFFER_TIMESTAMP (object->out_buf) = timestamp;
+        gst_pad_push (object->srcpad, object->out_buf);
+      }
+    }
+    /* no calculation done: remove excess field */
+    else if (object->field_history[cur_field_idx].flags ==
+        PICTURE_INTERLACED_TOP && object->fields == GST_DEINTERLACE2_BF) {
+      GST_DEBUG ("Removing unused top field");
+      buf = gst_deinterlace2_pop_history (object);
+      gst_buffer_unref (buf);
+    }
+
+    cur_field_idx = object->history_count - object->method->fields_required;
+
+    /* deinterlace bottom_field */
+    if ((object->field_history[cur_field_idx].flags == PICTURE_INTERLACED_BOTTOM
+            && object->fields == GST_DEINTERLACE2_BF) ||
+        object->fields == GST_DEINTERLACE2_ALL) {
+      GST_DEBUG ("deinterlacing bottom field");
+
+      /* create new buffer */
+      object->out_buf = gst_buffer_new_and_alloc (object->frame_size);
+      gst_buffer_set_caps (object->out_buf, GST_PAD_CAPS (object->srcpad));
+
+      /* do magic calculus */
+      if (object->method->deinterlace_frame != NULL) {
+        object->method->deinterlace_frame (object);
+
+        buf = gst_deinterlace2_pop_history (object);
+        timestamp = GST_BUFFER_TIMESTAMP (buf);
+        gst_buffer_unref (buf);
+
+        GST_BUFFER_TIMESTAMP (object->out_buf) = timestamp;
+        gst_pad_push (object->srcpad, object->out_buf);
+      }
+    }
+    /* no calculation done: remove excess field */
+    else if (object->field_history[cur_field_idx].flags ==
+        PICTURE_INTERLACED_BOTTOM && object->fields == GST_DEINTERLACE2_TF) {
+      GST_DEBUG ("Removing unused bottom field");
+      buf = gst_deinterlace2_pop_history (object);
+      gst_buffer_unref (buf);
+    }
+
+
+  } else {
+    object->out_buf = gst_deinterlace2_pop_history (object);
+    gst_pad_push (object->srcpad, object->out_buf);
+  }
+  GST_DEBUG ("----chain end ----\n\n");
+
+  return GST_FLOW_OK;
+}
+
+static gboolean
+gst_deinterlace2_setcaps (GstPad * pad, GstCaps * caps)
+{
+  gboolean res = TRUE;
+
+  GstDeinterlace2 *object = GST_DEINTERLACE2 (gst_pad_get_parent (pad));
+
+  GstPad *otherpad;
+
+  GstStructure *structure;
+
+  GstVideoFormat fmt;
+
+  guint32 fourcc;
+
+  otherpad = (pad == object->srcpad) ? object->sinkpad : object->srcpad;
+
+  if (!gst_pad_accept_caps (otherpad, caps)
+      || !gst_pad_set_caps (otherpad, caps))
+    goto caps_not_accepted;
+
+  structure = gst_caps_get_structure (caps, 0);
+
+  res = gst_structure_get_int (structure, "width", &object->frame_width);
+  res &= gst_structure_get_int (structure, "height", &object->frame_height);
+  res &=
+      gst_structure_get_fraction (structure, "framerate", &object->frame_rate_n,
+      &object->frame_rate_d);
+  res &= gst_structure_get_fourcc (structure, "format", &fourcc);
+  /* TODO: get interlaced, field_layout, field_order */
+  if (!res)
+    goto invalid_caps;
+
+  /* TODO: introduce object->field_stride */
+  object->field_height = object->frame_height / 2;
+
+  fmt = gst_video_format_from_fourcc (fourcc);
+
+  /* TODO: only true if fields are subbuffers of interlaced frames,
+     change when the buffer-fields concept has landed */
+  object->field_stride =
+      gst_video_format_get_row_stride (fmt, 0, object->frame_width) * 2;
+  object->output_stride =
+      gst_video_format_get_row_stride (fmt, 0, object->frame_width);
+
+  /* in bytes */
+  object->line_length =
+      gst_video_format_get_row_stride (fmt, 0, object->frame_width);
+  object->frame_size =
+      gst_video_format_get_size (fmt, object->frame_width,
+      object->frame_height);
+
+  GST_DEBUG_OBJECT (object, "Set caps: %" GST_PTR_FORMAT, caps);
+
+done:
+
+  gst_object_unref (object);
+  return res;
+
+invalid_caps:
+  res = FALSE;
+  GST_ERROR_OBJECT (object, "Invalid caps: %" GST_PTR_FORMAT, caps);
+  goto done;
+
+caps_not_accepted:
+  res = FALSE;
+  GST_ERROR_OBJECT (object, "Caps not accepted: %" GST_PTR_FORMAT, caps);
+  goto done;
+}
+
+static gboolean
+gst_deinterlace2_sink_event (GstPad * pad, GstEvent * event)
+{
+  gboolean res = TRUE;
+
+  GstDeinterlace2 *object = GST_DEINTERLACE2 (gst_pad_get_parent (pad));
+
+  GST_LOG_OBJECT (pad, "received %s event", GST_EVENT_TYPE_NAME (event));
+
+  switch (GST_EVENT_TYPE (event)) {
+    case GST_EVENT_FLUSH_STOP:
+    case GST_EVENT_EOS:
+    case GST_EVENT_NEWSEGMENT:
+      /* TODO: reset history */
+
+      /* fall through */
+    default:
+      res = gst_pad_event_default (pad, event);
+      break;
+  }
+
+  gst_object_unref (object);
+  return res;
+}
+
+static GstStateChangeReturn
+gst_deinterlace2_change_state (GstElement * element, GstStateChange transition)
+{
+  GstStateChangeReturn ret;
+
+  switch (transition) {
+    case GST_STATE_CHANGE_NULL_TO_READY:
+      break;
+    case GST_STATE_CHANGE_READY_TO_PAUSED:
+      break;
+    case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
+      break;
+    default:
+      break;
+  }
+
+  ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+  if (ret != GST_STATE_CHANGE_SUCCESS)
+    return ret;
+
+  switch (transition) {
+    case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
+      break;
+    case GST_STATE_CHANGE_PAUSED_TO_READY:
+      /* TODO: reset history, clean up, etc */
+      break;
+    case GST_STATE_CHANGE_READY_TO_NULL:
+    default:
+      break;
+  }
+
+  return ret;
+}
+
+static gboolean
+gst_deinterlace2_src_event (GstPad * pad, GstEvent * event)
+{
+  GstDeinterlace2 *object = GST_DEINTERLACE2 (gst_pad_get_parent (pad));
+
+  gboolean res;
+
+  GST_DEBUG_OBJECT (pad, "received %s event", GST_EVENT_TYPE_NAME (event));
+
+  switch (GST_EVENT_TYPE (event)) {
+    default:
+      res = gst_pad_event_default (pad, event);
+      break;
+  }
+
+  gst_object_unref (object);
+
+  return res;
+}
+
+static gboolean
+gst_deinterlace2_src_query (GstPad * pad, GstQuery * query)
+{
+  GstDeinterlace2 *object = GST_DEINTERLACE2 (gst_pad_get_parent (pad));
+
+  gboolean res = FALSE;
+
+  GST_LOG_OBJECT (object, "%s query", GST_QUERY_TYPE_NAME (query));
+
+  switch (GST_QUERY_TYPE (query)) {
+    case GST_QUERY_LATENCY:
+    {
+      GstClockTime min, max;
+
+      gboolean live;
+
+      GstPad *peer;
+
+      if ((peer = gst_pad_get_peer (object->sinkpad))) {
+        if ((res = gst_pad_query (peer, query))) {
+          GstClockTime latency;
+
+          gst_query_parse_latency (query, &live, &min, &max);
+
+          GST_DEBUG ("Peer latency: min %"
+              GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
+              GST_TIME_ARGS (min), GST_TIME_ARGS (max));
+
+          /* TODO: calculate our own latency from framerate
+           *       and object->method->fields_required */
+          /* add our own latency */
+
+          latency =
+              gst_util_uint64_scale (object->method->fields_required *
+              GST_SECOND, object->frame_rate_d, object->frame_rate_n);
+
+          GST_DEBUG ("Our latency: min %" GST_TIME_FORMAT
+              ", max %" GST_TIME_FORMAT,
+              GST_TIME_ARGS (latency), GST_TIME_ARGS (latency));
+
+          min += latency;
+          if (max != GST_CLOCK_TIME_NONE)
+            max += latency;
+          else
+            max = latency;
+
+          GST_DEBUG ("Calculated total latency : min %"
+              GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
+              GST_TIME_ARGS (min), GST_TIME_ARGS (max));
+
+          gst_query_set_latency (query, live, min, max);
+        }
+        gst_object_unref (peer);
+      }
+      break;
+    }
+    default:
+      res = gst_pad_query_default (pad, query);
+      break;
+  }
+
+  gst_object_unref (object);
+  return res;
+}
+
+static const GstQueryType *
+gst_deinterlace2_src_query_types (GstPad * pad)
+{
+  static const GstQueryType types[] = {
+    GST_QUERY_LATENCY,
+    GST_QUERY_NONE
+  };
+  return types;
+}
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+  GST_DEBUG_CATEGORY_INIT (deinterlace2_debug, "deinterlace2", 0,
+      "Deinterlacer");
+
+  oil_init ();
+
+  if (!gst_element_register (plugin, "deinterlace2", GST_RANK_NONE,
+          GST_TYPE_DEINTERLACE2)) {
+    return FALSE;
+  }
+
+  return TRUE;
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+    GST_VERSION_MINOR,
+    "deinterlace2",
+    "Deinterlacer", plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME,
+    GST_PACKAGE_ORIGIN);