Added libcolorspace plugin

Original commit message from CVS:
Added libcolorspace plugin

2 files changed, 542 insertions, 0 deletions

diff --git a/ext/lcs/Makefile.am b/ext/lcs/Makefile.am
new file mode 100644
index 00000000..8a4c1d6f
--- /dev/null
+++ b/ext/lcs/Makefile.am
@@ -0,0 +1,10 @@
+plugindir = $(libdir)/gst
+
+plugin_LTLIBRARIES = libgstcolorspace.la
+
+libgstcolorspace_la_SOURCES = gstcolorspace.c 
+libgstcolorspace_la_CFLAGS = $(GST_CFLAGS) $(LCS_CFLAGS)
+libgstcolorspace_la_LIBADD = $(LCS_LIBS)
+libgstcolorspace_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
+
+noinst_HEADERS = 
diff --git a/ext/lcs/gstcolorspace.c b/ext/lcs/gstcolorspace.c
new file mode 100644
index 00000000..8bad1b96
--- /dev/null
+++ b/ext/lcs/gstcolorspace.c
@@ -0,0 +1,532 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * 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 <gst/gst.h>
+#include <lcs/lcs.h>
+
+#define GST_TYPE_COLORSPACE \
+  (gst_colorspace_get_type())
+#define GST_COLORSPACE(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_COLORSPACE,GstColorspace))
+#define GST_COLORSPACE_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ULAW,GstColorspace))
+#define GST_IS_COLORSPACE(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_COLORSPACE))
+#define GST_IS_COLORSPACE_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_COLORSPACE))
+
+typedef struct _GstColorspace GstColorspace;
+typedef struct _GstColorspaceClass GstColorspaceClass;
+
+typedef enum {
+  GST_COLORSPACE_NONE,
+  GST_COLORSPACE_LCS,
+} GstColorSpaceConverterType;
+
+struct _GstColorspace {
+  GstElement 	 element;
+
+  GstPad 	*sinkpad, *srcpad;
+
+  LCSConverter 	*converter;
+  
+  GstColorSpaceConverterType type;
+  gint 		width, height;
+  gboolean 	disabled;
+
+  GstCaps	*sinkcaps;
+  
+  GstBufferPool *pool;
+};
+
+struct _GstColorspaceClass {
+  GstElementClass parent_class;
+};
+
+
+static GstElementDetails colorspace_details = {
+  "Colorspace converter",
+  "Filter/Effect",
+  "Converts video from one colorspace to another",
+  VERSION,
+  "Wim Taymans <wim.taymans@chello.be>",
+  "(C) 2001",
+};
+
+
+/* Stereo signals and args */
+enum {
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum {
+  ARG_0,
+  ARG_SOURCE,
+  ARG_DEST,
+};
+
+GST_PADTEMPLATE_FACTORY (colorspace_src_template_factory,
+  "src",
+  GST_PAD_SRC,
+  GST_PAD_ALWAYS,
+  GST_CAPS_NEW (
+    "colorspace_src",
+    "video/raw",
+      "format",		GST_PROPS_LIST (
+	                  GST_PROPS_FOURCC (GST_STR_FOURCC ("I420")),
+	                  GST_PROPS_FOURCC (GST_STR_FOURCC ("YUY2")),
+	                  GST_PROPS_FOURCC (GST_STR_FOURCC ("RGB "))
+	                ),
+      "width", 		GST_PROPS_INT_RANGE (0, G_MAXINT),
+      "height",		GST_PROPS_INT_RANGE (0, G_MAXINT) 
+  )
+)
+
+GST_PADTEMPLATE_FACTORY (colorspace_sink_template_factory,
+  "sink",
+  GST_PAD_SINK,
+  GST_PAD_ALWAYS,
+  GST_CAPS_NEW (
+    "colorspace_sink",
+    "video/raw",
+      "format",		GST_PROPS_LIST (
+	                  GST_PROPS_FOURCC (GST_STR_FOURCC ("I420")),
+	                  GST_PROPS_FOURCC (GST_STR_FOURCC ("YUY2")),
+	                  GST_PROPS_FOURCC (GST_STR_FOURCC ("RGB "))
+	                ),
+      "width", 		GST_PROPS_INT_RANGE (0, G_MAXINT),
+      "height",		GST_PROPS_INT_RANGE (0, G_MAXINT) 
+  )
+)
+
+static GType 		gst_colorspace_get_type 		(void);
+
+static void		gst_colorspace_class_init		(GstColorspaceClass *klass);
+static void		gst_colorspace_init			(GstColorspace *space);
+
+static void		gst_colorspace_set_property		(GObject *object, guint prop_id, 
+								 const GValue *value, GParamSpec *pspec);
+static void		gst_colorspace_get_property		(GObject *object, guint prop_id, 
+								 GValue *value, GParamSpec *pspec);
+
+static GstPadConnectReturn
+			gst_colorspace_sinkconnect		(GstPad *pad, GstCaps *caps);
+static GstPadConnectReturn
+			gst_colorspace_srcconnect 		(GstPad *pad, GstCaps *caps);
+static GstPadConnectReturn
+			gst_colorspace_srcconnect_func 		(GstPad *pad, GstCaps *caps, gboolean newcaps);
+static void		gst_colorspace_chain			(GstPad *pad, GstBuffer *buf);
+static GstElementStateReturn
+			gst_colorspace_change_state 		(GstElement *element);
+
+static GstElementClass *parent_class = NULL;
+/*static guint gst_colorspace_signals[LAST_SIGNAL] = { 0 }; */
+
+static GstBufferPool* 
+colorspace_get_bufferpool (GstPad *pad)
+{
+  GstColorspace *space;
+
+  space = GST_COLORSPACE (gst_pad_get_parent (pad));
+
+  if (space->type == GST_COLORSPACE_NONE && !space->disabled)
+    return gst_pad_get_bufferpool (space->srcpad);
+  else
+    return NULL;
+}
+
+static const LCSFormat*
+colorspace_find_lcs_format (GstCaps *caps)
+{
+  const LCSFormat *format = NULL;
+  guint32 space;
+
+  gst_caps_get_fourcc_int (caps, "format", &space);
+
+  if (space == GST_MAKE_FOURCC ('R','G','B',' ')) {
+    gint mask, bpp;
+
+    gulong red_bits, red_shift;
+    gulong green_bits, green_shift;
+    gulong blue_bits, blue_shift;
+     
+    gst_caps_get_int (caps, "bpp", &bpp);
+    gst_caps_get_int (caps, "red_mask", &mask);
+    lcs_utils_mask_to_shift (mask, &red_bits, &red_shift);
+    gst_caps_get_int (caps, "green_mask", &mask);
+    lcs_utils_mask_to_shift (mask, &green_bits, &green_shift);
+    gst_caps_get_int (caps, "blue_mask", &mask);
+    lcs_utils_mask_to_shift (mask, &blue_bits, &blue_shift);
+
+    format = lcs_format_new_simple_rgb_packed (red_bits, green_bits, blue_bits, 0,
+		    red_shift, green_shift, blue_shift, 0, bpp);
+
+    g_print ("%lu %lu %lu %lu %lu %lu %s\n", red_bits, green_bits, blue_bits, 
+		    red_shift, green_shift, blue_shift, lcs_format_get_layout (format));
+  }
+  else {
+    gchar fourcc[5];
+
+    lcs_utils_fourcc_to_string (space, fourcc);
+    format = lcs_alias_find_format (fourcc);
+  }
+
+  return format;
+}
+
+static gboolean 
+colorspace_setup_converter (GstColorspace *space, GstCaps *from_caps, GstCaps *to_caps)
+{
+  const LCSFormat *from_format = NULL;
+  const LCSFormat *to_format = NULL;
+
+  g_return_val_if_fail (to_caps != NULL, FALSE);
+  g_return_val_if_fail (from_caps != NULL, FALSE);
+
+  from_format 	= colorspace_find_lcs_format (from_caps);
+  to_format 	= colorspace_find_lcs_format (to_caps);
+	  
+  space->converter = lcs_get_converter (from_format, to_format, LCS_FLAG_FAST);
+
+  if (space->converter) {
+    space->type = GST_COLORSPACE_LCS;
+    return TRUE;
+  }
+
+  return FALSE;
+}
+
+static GstCaps*
+gst_colorspace_getcaps (GstPad *pad, GstCaps *caps)
+{
+  GstColorspace *space;
+  GstCaps *result;
+  GstCaps *peercaps;
+  GstCaps *ourcaps;
+  
+  space = GST_COLORSPACE (gst_pad_get_parent (pad));
+
+  /* we can do everything our peer can... */
+  peercaps = gst_caps_copy (gst_pad_get_allowed_caps (space->srcpad));
+  /* and our own template of course */
+  ourcaps = gst_caps_copy (gst_pad_get_padtemplate_caps (pad));
+
+  /* merge them together, we prefer the peercaps first */
+  result = gst_caps_prepend (ourcaps, peercaps);
+
+  return result;
+}
+
+static GstPadConnectReturn
+gst_colorspace_sinkconnect (GstPad *pad, GstCaps *caps)
+{
+  GstColorspace *space;
+  GstPad *peer;
+
+  space = GST_COLORSPACE (gst_pad_get_parent (pad));
+
+  if (!GST_CAPS_IS_FIXED (caps)) {
+    return GST_PAD_CONNECT_DELAYED;
+  }
+
+  gst_caps_get_int (caps, "width", &space->width);
+  gst_caps_get_int (caps, "height", &space->height);
+
+  GST_INFO (GST_CAT_PROPERTIES, "size: %dx%d", space->width, space->height);
+
+  space->sinkcaps = caps;
+
+  peer = gst_pad_get_peer (pad);
+  if (peer) {
+    if (!gst_colorspace_srcconnect_func (pad, gst_pad_get_allowed_caps (space->srcpad), FALSE)) {
+      space->sinkcaps = NULL;
+      return GST_PAD_CONNECT_REFUSED;
+    }
+  }
+
+  return GST_PAD_CONNECT_OK;
+}
+
+static GstPadConnectReturn
+gst_colorspace_srcconnect (GstPad *pad, GstCaps *caps)
+{
+  return gst_colorspace_srcconnect_func (pad, caps, TRUE);
+}
+
+static GstPadConnectReturn
+gst_colorspace_srcconnect_func (GstPad *pad, GstCaps *caps, gboolean newcaps)
+{
+  GstColorspace *space;
+  GstCaps *peercaps;
+  GstCaps *ourcaps;
+  
+  space = GST_COLORSPACE (gst_pad_get_parent (pad));
+
+  /* we cannot operate if we didn't get src caps */
+  ourcaps = space->sinkcaps;
+  if (!ourcaps) {
+    if (newcaps)
+      gst_pad_recalc_allowed_caps (space->sinkpad);
+
+    return GST_PAD_CONNECT_DELAYED;
+  }
+
+  /* first see if we can do the format natively by filtering the peer caps 
+   * with our incomming caps */
+  peercaps = gst_caps_intersect (caps, ourcaps); 
+  if (peercaps) {
+    /* see if the peer likes it too, it should as the caps say so.. */
+    if (gst_pad_try_set_caps (space->srcpad, peercaps)) {
+      space->type = GST_COLORSPACE_NONE;
+      space->disabled = FALSE;
+      return GST_PAD_CONNECT_DONE;
+    }
+  }
+  /* then see what the peer has that matches the size */
+  peercaps = gst_caps_intersect (caps,
+		  GST_CAPS_NEW (
+		   "colorspace_filter",
+		   "video/raw",
+		     "width",   GST_PROPS_INT (space->width),
+		     "height",  GST_PROPS_INT (space->height)
+		  ));
+
+  /* we are looping over the caps, so we have to get rid of the lists */
+  peercaps = gst_caps_normalize (peercaps);
+
+  /* loop over all possibilities and select the first one we can convert and
+   * is accepted by the peer */
+  while (peercaps) {
+    if (colorspace_setup_converter (space, ourcaps, peercaps)) {
+      if (gst_pad_try_set_caps (space->srcpad, peercaps)) {
+        space->disabled = FALSE;
+        return GST_PAD_CONNECT_DONE;
+      }
+    }
+    peercaps = peercaps->next;
+  }
+  
+  gst_element_error (GST_ELEMENT (space), "could not agree on caps with peer pads");
+  /* we disable ourself here */
+  space->disabled = TRUE;
+
+  return GST_PAD_CONNECT_REFUSED;
+}
+
+static GType
+gst_colorspace_get_type (void)
+{
+  static GType colorspace_type = 0;
+
+  if (!colorspace_type) {
+    static const GTypeInfo colorspace_info = {
+      sizeof(GstColorspaceClass),
+      NULL,
+      NULL,
+      (GClassInitFunc)gst_colorspace_class_init,
+      NULL,
+      NULL,
+      sizeof(GstColorspace),
+      0,
+      (GInstanceInitFunc)gst_colorspace_init,
+    };
+    colorspace_type = g_type_register_static(GST_TYPE_ELEMENT, "GstColorspaceLCS", &colorspace_info, 0);
+  }
+  return colorspace_type;
+}
+
+static void
+gst_colorspace_class_init (GstColorspaceClass *klass)
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+
+  gobject_class = (GObjectClass*)klass;
+  gstelement_class = (GstElementClass*)klass;
+
+  parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
+
+  gobject_class->set_property = gst_colorspace_set_property;
+  gobject_class->get_property = gst_colorspace_get_property;
+
+  gstelement_class->change_state = gst_colorspace_change_state;
+}
+
+static void
+gst_colorspace_init (GstColorspace *space)
+{
+  space->sinkpad = gst_pad_new_from_template (
+		  GST_PADTEMPLATE_GET (colorspace_sink_template_factory), "sink");
+  gst_pad_set_connect_function (space->sinkpad, gst_colorspace_sinkconnect);
+  gst_pad_set_getcaps_function (space->sinkpad, gst_colorspace_getcaps);
+  gst_pad_set_bufferpool_function (space->sinkpad, colorspace_get_bufferpool);
+  gst_pad_set_chain_function(space->sinkpad,gst_colorspace_chain);
+  gst_element_add_pad(GST_ELEMENT(space),space->sinkpad);
+
+  space->srcpad = gst_pad_new_from_template (
+		  GST_PADTEMPLATE_GET (colorspace_src_template_factory), "src");
+  gst_element_add_pad(GST_ELEMENT(space),space->srcpad);
+  gst_pad_set_connect_function (space->srcpad, gst_colorspace_srcconnect);
+
+  space->pool = NULL;
+  space->disabled = TRUE;
+}
+
+static void
+gst_colorspace_chain (GstPad *pad,GstBuffer *buf)
+{
+  GstColorspace *space;
+  GstBuffer *outbuf = NULL;
+
+  g_return_if_fail (pad != NULL);
+  g_return_if_fail (GST_IS_PAD (pad));
+  g_return_if_fail (buf != NULL);
+
+  space = GST_COLORSPACE (gst_pad_get_parent (pad));
+  
+  g_return_if_fail (space != NULL);
+  g_return_if_fail (GST_IS_COLORSPACE (space));
+
+  if (space->disabled) {
+    gst_buffer_unref (buf);
+    return;
+  }
+
+  if (space->type == GST_COLORSPACE_NONE) {
+    outbuf = buf;
+  }
+  else {
+    if (space->pool) {
+      outbuf = gst_buffer_new_from_pool (space->pool, 0, 0);
+    }
+
+    if (!outbuf) {
+      guint size;
+      outbuf = gst_buffer_new ();
+
+      lcs_format_buffer_size (
+		      lcs_convert_get_dest_format (space->converter),
+		      space->width, space->height, &size);
+
+      GST_BUFFER_SIZE (outbuf) = size;
+      GST_BUFFER_DATA (outbuf) = g_malloc (GST_BUFFER_SIZE (outbuf));
+    }
+
+    if (space->type == GST_COLORSPACE_LCS) {
+       lcs_convert_auto (space->converter, 
+		       	 GST_BUFFER_DATA (buf), 
+		       	 GST_BUFFER_DATA (outbuf), 
+			 space->width, space->height);
+    }
+
+    GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
+
+    gst_buffer_unref (buf);
+  }
+  gst_pad_push (space->srcpad, outbuf);
+}
+
+static GstElementStateReturn
+gst_colorspace_change_state (GstElement *element)
+{
+  GstColorspace *space;
+
+  space = GST_COLORSPACE (element);
+
+  switch (GST_STATE_TRANSITION (element)) {
+    case GST_STATE_PAUSED_TO_PLAYING:
+      space->pool = gst_pad_get_bufferpool (space->srcpad);
+      break;
+    case GST_STATE_PLAYING_TO_PAUSED:
+      space->pool = NULL;
+      break;
+  }
+
+  parent_class->change_state (element);
+
+  return GST_STATE_SUCCESS;
+}
+
+static void
+gst_colorspace_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
+{
+  GstColorspace *space;
+
+  /* it's not null if we got it, but it might not be ours */
+  g_return_if_fail(GST_IS_COLORSPACE(object));
+  space = GST_COLORSPACE(object);
+
+  switch (prop_id) {
+    default:
+      break;
+  }
+}
+
+static void
+gst_colorspace_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
+{
+  GstColorspace *space;
+
+  /* it's not null if we got it, but it might not be ours */
+  g_return_if_fail(GST_IS_COLORSPACE(object));
+  space = GST_COLORSPACE(object);
+
+  switch (prop_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static gboolean
+plugin_init (GModule *module, GstPlugin *plugin)
+{
+  GstElementFactory *factory;
+
+  lcs_init (NULL, NULL);
+
+  factory = gst_elementfactory_new ("colorspacelcs", GST_TYPE_COLORSPACE,
+                                    &colorspace_details);
+  g_return_val_if_fail (factory != NULL, FALSE);
+  
+  gst_elementfactory_add_padtemplate (factory, 
+		  GST_PADTEMPLATE_GET (colorspace_src_template_factory));
+  gst_elementfactory_add_padtemplate (factory, 
+		  GST_PADTEMPLATE_GET (colorspace_sink_template_factory));
+
+  gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
+
+  return TRUE;
+}
+
+GstPluginDesc plugin_desc = {
+  GST_VERSION_MAJOR,
+  GST_VERSION_MINOR,
+  "colorspacelcs",
+  plugin_init
+};
+
+
+
+
+
+
+
+