interlace: new element

configure.ac

@@ -284,6 +284,7 @@ AG_GST_CHECK_PLUGIN(geometrictransform)
 AG_GST_CHECK_PLUGIN(h264parse)
 AG_GST_CHECK_PLUGIN(hdvparse)
 AG_GST_CHECK_PLUGIN(id3tag)
+AG_GST_CHECK_PLUGIN(interlace)
 AG_GST_CHECK_PLUGIN(invtelecine)
 AG_GST_CHECK_PLUGIN(ivfparse)
 AG_GST_CHECK_PLUGIN(jpegformat)
@@ -1698,6 +1699,7 @@ gst/geometrictransform/Makefile
 gst/h264parse/Makefile
 gst/hdvparse/Makefile
 gst/id3tag/Makefile
+gst/interlace/Makefile
 gst/invtelecine/Makefile
 gst/ivfparse/Makefile
 gst/jpegformat/Makefile

gst/interlace/Makefile.am

@@ -0,0 +1,17 @@
+plugin_LTLIBRARIES = libgstinterlace.la
+
+libgstinterlace_la_SOURCES = \
+	gstinterlace.c
+
+libgstinterlace_la_CFLAGS = \
+	$(GST_CFLAGS) \
+	$(GST_PLUGINS_BASE_CFLAGS)
+
+libgstinterlace_la_LIBADD = \
+	$(GST_LIBS) \
+	$(GST_PLUGINS_BASE_LIBS) -lgstvideo-@GST_MAJORMINOR@ \
+	$(LIBM)
+
+libgstinterlace_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
+libgstinterlace_la_LIBTOOLFLAGS = --tag=disable-static
+

gst/interlace/gstinterlace.c

@@ -0,0 +1,457 @@
+/* GStreamer
+ * Copyright (C) 2010 David A. Schleef <ds@schleef.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 <gst/gst.h>
+#include <gst/video/video.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+
+GST_DEBUG_CATEGORY (gst_interlace_debug);
+#define GST_CAT_DEFAULT gst_interlace_debug
+
+#define GST_TYPE_INTERLACE \
+  (gst_interlace_get_type())
+#define GST_INTERLACE(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_INTERLACE,GstInterlace))
+#define GST_INTERLACE_DEC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_INTERLACE,GstInterlaceClass))
+#define GST_IS_GST_INTERLACE(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_INTERLACE))
+#define GST_IS_GST_INTERLACE_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_INTERLACE))
+
+typedef struct _GstInterlace GstInterlace;
+typedef struct _GstInterlaceClass GstInterlaceClass;
+
+struct _GstInterlace
+{
+  GstElement element;
+
+  GstPad *srcpad;
+  GstPad *sinkpad;
+  GstCaps *srccaps;
+
+  /* properties */
+  gboolean top_field_first;
+
+  /* state */
+  int width;
+  int height;
+  GstVideoFormat format;
+  GstBuffer *stored_frame;
+
+};
+
+struct _GstInterlaceClass
+{
+  GstElementClass element_class;
+
+};
+
+enum
+{
+  ARG_0,
+  PROP_TOP_FIELD_FIRST
+};
+
+static GstStaticPadTemplate gst_interlace_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{YUY2,UYVY,I420,YV12}")
+        ",interlaced=TRUE")
+    );
+
+static GstStaticPadTemplate gst_interlace_sink_template =
+GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{YUY2,UYVY,I420,YV12}")
+        ",interlaced=FALSE")
+    );
+
+static void gst_interlace_base_init (gpointer g_class);
+static void gst_interlace_class_init (GstInterlaceClass * klass);
+static void gst_interlace_init (GstInterlace * interlace);
+static GstFlowReturn gst_interlace_chain (GstPad * pad, GstBuffer * buffer);
+
+static void gst_interlace_set_property (GObject * object,
+    guint prop_id, const GValue * value, GParamSpec * pspec);
+static void gst_interlace_get_property (GObject * object,
+    guint prop_id, GValue * value, GParamSpec * pspec);
+
+static gboolean gst_interlace_setcaps (GstPad * pad, GstCaps * caps);
+static GstCaps *gst_interlace_getcaps (GstPad * pad);
+static GstStateChangeReturn gst_interlace_change_state (GstElement * element,
+    GstStateChange transition);
+
+static GstElementClass *parent_class = NULL;
+
+
+static GType
+gst_interlace_get_type (void)
+{
+  static GType interlace_type = 0;
+
+  if (!interlace_type) {
+    static const GTypeInfo interlace_info = {
+      sizeof (GstInterlaceClass),
+      gst_interlace_base_init,
+      NULL,
+      (GClassInitFunc) gst_interlace_class_init,
+      NULL,
+      NULL,
+      sizeof (GstInterlace),
+      0,
+      (GInstanceInitFunc) gst_interlace_init,
+    };
+
+    interlace_type = g_type_register_static (GST_TYPE_ELEMENT,
+        "GstInterlace", &interlace_info, 0);
+  }
+
+  return interlace_type;
+}
+
+static void
+gst_interlace_base_init (gpointer g_class)
+{
+
+  GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+
+  gst_element_class_set_details_simple (element_class,
+      "Inverse Telecine filter", "Filter/Video",
+      "Detects and reconstructs progressive content from telecine video",
+      "Entropy Wave <ds@entropywave.com>");
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_interlace_sink_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_interlace_src_template));
+}
+
+static void
+gst_interlace_class_init (GstInterlaceClass * klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  parent_class = g_type_class_peek_parent (klass);
+
+  object_class->set_property = gst_interlace_set_property;
+  object_class->get_property = gst_interlace_get_property;
+
+  element_class->change_state = gst_interlace_change_state;
+
+  g_object_class_install_property (object_class, PROP_TOP_FIELD_FIRST,
+      g_param_spec_boolean ("top-field-first", "top field first",
+          "Interlaced stream should be top field first", FALSE,
+          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+}
+
+static void
+gst_interlace_init (GstInterlace * interlace)
+{
+  GST_DEBUG ("gst_interlace_init");
+  interlace->sinkpad =
+      gst_pad_new_from_static_template (&gst_interlace_sink_template, "sink");
+  gst_element_add_pad (GST_ELEMENT (interlace), interlace->sinkpad);
+  gst_pad_set_chain_function (interlace->sinkpad, gst_interlace_chain);
+  gst_pad_set_setcaps_function (interlace->sinkpad, gst_interlace_setcaps);
+  gst_pad_set_getcaps_function (interlace->sinkpad, gst_interlace_getcaps);
+
+  interlace->srcpad =
+      gst_pad_new_from_static_template (&gst_interlace_src_template, "src");
+  gst_element_add_pad (GST_ELEMENT (interlace), interlace->srcpad);
+  gst_pad_set_setcaps_function (interlace->srcpad, gst_interlace_setcaps);
+  gst_pad_set_getcaps_function (interlace->srcpad, gst_interlace_getcaps);
+
+  interlace->top_field_first = FALSE;
+}
+
+static GstCaps *
+gst_interlace_getcaps (GstPad * pad)
+{
+  GstInterlace *interlace;
+  GstPad *otherpad;
+  GstCaps *othercaps;
+  GstCaps *icaps;
+  GstStructure *structure;
+  int i;
+
+  interlace = GST_INTERLACE (gst_pad_get_parent (pad));
+
+  otherpad =
+      (pad == interlace->srcpad) ? interlace->sinkpad : interlace->srcpad;
+
+  othercaps = gst_pad_peer_get_caps (otherpad);
+  if (othercaps == NULL) {
+    icaps = gst_caps_copy (gst_pad_get_pad_template_caps (otherpad));
+  } else {
+    icaps = gst_caps_intersect (othercaps,
+        gst_pad_get_pad_template_caps (otherpad));
+  }
+
+  for (i = 0; i < gst_caps_get_size (icaps); i++) {
+    structure = gst_caps_get_structure (icaps, i);
+
+    if (pad == interlace->srcpad) {
+      gst_structure_set (structure, "interlaced", G_TYPE_BOOLEAN, TRUE, NULL);
+    } else {
+      gst_structure_set (structure, "interlaced", G_TYPE_BOOLEAN, FALSE, NULL);
+    }
+  }
+
+  return icaps;
+}
+
+static gboolean
+gst_interlace_setcaps (GstPad * pad, GstCaps * caps)
+{
+  GstInterlace *interlace;
+  gboolean ret;
+  int width, height;
+  GstVideoFormat format;
+  gboolean interlaced = TRUE;
+  int fps_n, fps_d;
+  GstPad *otherpad;
+  GstCaps *othercaps;
+  GstStructure *structure;
+
+  interlace = GST_INTERLACE (gst_pad_get_parent (pad));
+
+  otherpad =
+      (pad == interlace->srcpad) ? interlace->sinkpad : interlace->srcpad;
+
+  ret = gst_video_format_parse_caps (caps, &format, &width, &height);
+  gst_video_format_parse_caps_interlaced (caps, &interlaced);
+  ret &= gst_video_parse_caps_framerate (caps, &fps_n, &fps_d);
+
+  if (!ret)
+    goto error;
+
+  othercaps = gst_caps_copy (caps);
+
+  structure = gst_caps_get_structure (othercaps, 0);
+
+  if (pad == interlace->srcpad) {
+    gst_structure_set (structure,
+        "interlaced", G_TYPE_BOOLEAN, FALSE,
+        "framerate", GST_TYPE_FRACTION, fps_n * 2, fps_d, NULL);
+  } else {
+    gst_structure_set (structure,
+        "interlaced", G_TYPE_BOOLEAN, TRUE,
+        "framerate", GST_TYPE_FRACTION, fps_n, fps_d * 2, NULL);
+  }
+
+  ret = gst_pad_set_caps (otherpad, othercaps);
+  if (!ret)
+    goto error;
+
+  interlace->format = format;
+  interlace->width = width;
+  interlace->height = height;
+
+  if (pad == interlace->sinkpad) {
+    interlace->srccaps = gst_caps_ref (othercaps);
+  } else {
+    interlace->srccaps = gst_caps_ref (caps);
+  }
+
+error:
+  g_object_unref (interlace);
+
+  return ret;
+}
+
+static void
+copy_field (GstInterlace * interlace, GstBuffer * d, GstBuffer * s,
+    int field_index)
+{
+  int j;
+  guint8 *dest;
+  guint8 *src;
+  int width = interlace->width;
+  int height = interlace->height;
+
+  if (interlace->format == GST_VIDEO_FORMAT_I420 ||
+      interlace->format == GST_VIDEO_FORMAT_YV12) {
+    /* planar 4:2:0 */
+    for (j = field_index; j < height; j += 2) {
+      dest = GST_BUFFER_DATA (d) + j * width;
+      src = GST_BUFFER_DATA (s) + j * width;
+      memcpy (dest, src, width);
+    }
+    for (j = field_index; j < height / 2; j += 2) {
+      dest = GST_BUFFER_DATA (d) + width * height + j * width / 2;
+      src = GST_BUFFER_DATA (s) + width * height + j * width / 2;
+      memcpy (dest, src, width / 2);
+    }
+    for (j = field_index; j < height / 2; j += 2) {
+      dest =
+          GST_BUFFER_DATA (d) + width * height + width / 2 * height / 2 +
+          j * width / 2;
+      src =
+          GST_BUFFER_DATA (s) + width * height + width / 2 * height / 2 +
+          j * width / 2;
+      memcpy (dest, src, width / 2);
+    }
+  } else {
+    /* packed 4:2:2 */
+    for (j = field_index; j < height; j += 2) {
+      dest = GST_BUFFER_DATA (d) + j * width * 2;
+      src = GST_BUFFER_DATA (s) + j * width * 2;
+      memcpy (dest, src, width * 2);
+    }
+  }
+}
+
+
+static GstFlowReturn
+gst_interlace_chain (GstPad * pad, GstBuffer * buffer)
+{
+  GstInterlace *interlace = GST_INTERLACE (gst_pad_get_parent (pad));
+  GstFlowReturn ret;
+
+  GST_DEBUG ("Received buffer at %u:%02u:%02u:%09u",
+      (guint) (GST_BUFFER_TIMESTAMP (buffer) / (GST_SECOND * 60 * 60)),
+      (guint) ((GST_BUFFER_TIMESTAMP (buffer) / (GST_SECOND * 60)) % 60),
+      (guint) ((GST_BUFFER_TIMESTAMP (buffer) / GST_SECOND) % 60),
+      (guint) (GST_BUFFER_TIMESTAMP (buffer) % GST_SECOND));
+
+  GST_DEBUG ("duration %" GST_TIME_FORMAT " flags %04x %s %s %s",
+      GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)),
+      GST_BUFFER_FLAGS (buffer),
+      (GST_BUFFER_FLAGS (buffer) & GST_VIDEO_BUFFER_TFF) ? "tff" : "",
+      (GST_BUFFER_FLAGS (buffer) & GST_VIDEO_BUFFER_RFF) ? "rff" : "",
+      (GST_BUFFER_FLAGS (buffer) & GST_VIDEO_BUFFER_ONEFIELD) ? "onefield" :
+      "");
+
+  if (GST_BUFFER_FLAGS (buffer) & GST_BUFFER_FLAG_DISCONT) {
+    GST_ERROR ("discont");
+
+  }
+
+  if (interlace->stored_frame == NULL) {
+    interlace->stored_frame = buffer;
+    ret = GST_FLOW_OK;
+  } else {
+    GstBuffer *output_buffer;
+
+    output_buffer = gst_buffer_new_and_alloc (GST_BUFFER_SIZE (buffer));
+
+    copy_field (interlace, output_buffer, interlace->stored_frame,
+        !interlace->top_field_first);
+    copy_field (interlace, output_buffer, buffer, interlace->top_field_first);
+
+    GST_BUFFER_TIMESTAMP (output_buffer) =
+        GST_BUFFER_TIMESTAMP (interlace->stored_frame);
+    GST_BUFFER_DURATION (output_buffer) =
+        GST_BUFFER_DURATION (interlace->stored_frame) +
+        GST_BUFFER_DURATION (buffer);
+    gst_buffer_set_caps (output_buffer, interlace->srccaps);
+
+    if (interlace->top_field_first) {
+      GST_BUFFER_FLAG_SET (output_buffer, GST_VIDEO_BUFFER_TFF);
+    }
+
+    ret = gst_pad_push (interlace->srcpad, output_buffer);
+
+    gst_buffer_unref (buffer);
+    gst_buffer_unref (interlace->stored_frame);
+    interlace->stored_frame = NULL;
+  }
+
+  gst_object_unref (interlace);
+
+  return ret;
+}
+
+static void
+gst_interlace_set_property (GObject * object,
+    guint prop_id, const GValue * value, GParamSpec * pspec)
+{
+  GstInterlace *interlace = GST_INTERLACE (object);
+
+  switch (prop_id) {
+    case PROP_TOP_FIELD_FIRST:
+      interlace->top_field_first = g_value_get_boolean (value);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_interlace_get_property (GObject * object,
+    guint prop_id, GValue * value, GParamSpec * pspec)
+{
+  GstInterlace *interlace = GST_INTERLACE (object);
+
+  switch (prop_id) {
+    case PROP_TOP_FIELD_FIRST:
+      g_value_set_boolean (value, interlace->top_field_first);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static GstStateChangeReturn
+gst_interlace_change_state (GstElement * element, GstStateChange transition)
+{
+  //GstInterlace *interlace = GST_INTERLACE (element);
+
+  switch (transition) {
+    case GST_STATE_CHANGE_PAUSED_TO_READY:
+      //gst_interlace_reset (interlace);
+      break;
+    default:
+      break;
+  }
+
+  if (parent_class->change_state)
+    return parent_class->change_state (element, transition);
+
+  return GST_STATE_CHANGE_SUCCESS;
+}
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+  GST_DEBUG_CATEGORY_INIT (gst_interlace_debug, "interlace", 0,
+      "interlace element");
+
+  return gst_element_register (plugin, "interlace", GST_RANK_NONE,
+      GST_TYPE_INTERLACE);
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+    GST_VERSION_MINOR,
+    "interlace",
+    "Create an interlaced video stream",
+    plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)