configure.ac: Adding videomixer.

Original commit message from CVS:
2005-10-17  Julien MOUTTE  <julien@moutte.net>

* configure.ac: Adding videomixer.
* ext/libpng/gstpngdec.c: (gst_pngdec_class_init),
(user_read_data), (gst_pngdec_chain): More debugging.
* gst/alpha/Makefile.am: Adding alphacolor
* gst/alpha/gstalphacolor.c: (gst_alpha_color_base_init),
(gst_alpha_color_class_init), (gst_alpha_color_init),
(gst_alpha_color_transform_caps), (gst_alpha_color_set_caps),
(transform_rgb), (transform_bgr),
(gst_alpha_color_transform_ip),
(plugin_init): Ported to 0.9 using in place base tranform.
* gst/videomixer/Makefile.am:
* gst/videomixer/videomixer.c: (gst_videomixer_pad_get_type),
(gst_videomixer_pad_class_init),
(gst_videomixer_pad_sink_setcaps),
(gst_videomixer_pad_link), (gst_videomixer_pad_unlink),
(gst_videomixer_pad_init), (gst_videomixer_class_init),
(gst_videomixer_init), (gst_videomixer_getcaps),
(gst_videomixer_request_new_pad), (gst_videomixer_fill_queues),
(gst_videomixer_blend_buffers), (gst_videomixer_update_queues),
(gst_videomixer_collected), (gst_videomixer_change_state):
Ported
to 0.9 using collectpads.

2 files changed, 264 insertions, 1 deletions

diff --git a/gst/alpha/Makefile.am b/gst/alpha/Makefile.am
index e96cfd56..95c565a1 100644
--- a/gst/alpha/Makefile.am
+++ b/gst/alpha/Makefile.am
@@ -1,9 +1,15 @@
 
-plugin_LTLIBRARIES = libgstalpha.la
+plugin_LTLIBRARIES = libgstalpha.la libgstalphacolor.la
 
 libgstalpha_la_SOURCES = gstalpha.c
 libgstalpha_la_CFLAGS = $(GST_CFLAGS) $(GST_PLUGINS_BASE_CFLAGS)
 libgstalpha_la_LIBADD = $(GST_LIBS)
 libgstalpha_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
 
+libgstalphacolor_la_SOURCES = gstalphacolor.c
+libgstalphacolor_la_CFLAGS = $(GST_CFLAGS) $(GST_BASE_CFLAGS) \
+			     $(GST_PLUGINS_BASE_CFLAGS)
+libgstalphacolor_la_LIBADD = $(GST_LIBS) $(GST_BASE_LIBS)
+libgstalphacolor_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
+
 noinst_HEADERS = 
diff --git a/gst/alpha/gstalphacolor.c b/gst/alpha/gstalphacolor.c
new file mode 100644
index 00000000..0267c824
--- /dev/null
+++ b/gst/alpha/gstalphacolor.c
@@ -0,0 +1,257 @@
+/* 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include <gst/gst.h>
+#include <gst/base/gstbasetransform.h>
+#include <gst/video/video.h>
+
+#include <string.h>
+
+GST_DEBUG_CATEGORY (alpha_color_debug);
+#define GST_CAT_DEFAULT alpha_color_debug
+
+#define GST_TYPE_ALPHA_COLOR \
+  (gst_alpha_color_get_type())
+#define GST_ALPHA_COLOR(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ALPHA_COLOR,GstAlphaColor))
+#define GST_ALPHA_COLOR_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ALPHA_COLOR,GstAlphaColorClass))
+#define GST_IS_ALPHA_COLOR(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ALPHA_COLOR))
+#define GST_IS_ALPHA_COLOR_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ALPHA_COLOR))
+
+typedef struct _GstAlphaColor GstAlphaColor;
+typedef struct _GstAlphaColorClass GstAlphaColorClass;
+
+struct _GstAlphaColor
+{
+  GstBaseTransform element;
+
+  /* caps */
+  gint in_width, in_height;
+  gboolean in_rgba;
+  gint out_width, out_height;
+};
+
+struct _GstAlphaColorClass
+{
+  GstBaseTransformClass parent_class;
+};
+
+/* elementfactory information */
+static GstElementDetails gst_alpha_color_details =
+GST_ELEMENT_DETAILS ("alpha color filter",
+    "Filter/Effect/Video",
+    "RGB->YUV colorspace conversion preserving the alpha channels",
+    "Wim Taymans <wim@fluendo.com>");
+
+static GstStaticPadTemplate gst_alpha_color_sink_template =
+    GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS (GST_VIDEO_CAPS_RGBA ";" GST_VIDEO_CAPS_BGRA)
+    );
+
+static GstStaticPadTemplate gst_alpha_color_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("AYUV"))
+    );
+
+GST_BOILERPLATE (GstAlphaColor, gst_alpha_color, GstBaseTransform,
+    GST_TYPE_BASE_TRANSFORM);
+
+static GstCaps *gst_alpha_color_transform_caps (GstBaseTransform * btrans,
+    GstPadDirection direction, GstCaps * caps);
+static gboolean gst_alpha_color_set_caps (GstBaseTransform * btrans,
+    GstCaps * incaps, GstCaps * outcaps);
+static GstFlowReturn gst_alpha_color_transform_ip (GstBaseTransform * btrans,
+    GstBuffer * inbuf);
+
+static void
+gst_alpha_color_base_init (gpointer g_class)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+
+  gst_element_class_set_details (element_class, &gst_alpha_color_details);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_alpha_color_sink_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_alpha_color_src_template));
+}
+
+static void
+gst_alpha_color_class_init (GstAlphaColorClass * klass)
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+  GstBaseTransformClass *gstbasetransform_class;
+
+  gobject_class = (GObjectClass *) klass;
+  gstelement_class = (GstElementClass *) klass;
+  gstbasetransform_class = (GstBaseTransformClass *) klass;
+
+  gstbasetransform_class->transform_caps =
+      GST_DEBUG_FUNCPTR (gst_alpha_color_transform_caps);
+  gstbasetransform_class->set_caps =
+      GST_DEBUG_FUNCPTR (gst_alpha_color_set_caps);
+  gstbasetransform_class->transform_ip =
+      GST_DEBUG_FUNCPTR (gst_alpha_color_transform_ip);
+
+  GST_DEBUG_CATEGORY_INIT (alpha_color_debug, "alphacolor", 0,
+      "RGB->YUV colorspace conversion preserving the alpha channels");
+}
+
+static void
+gst_alpha_color_init (GstAlphaColor * alpha, GstAlphaColorClass * g_class)
+{
+  GstBaseTransform *btrans = NULL;
+
+  btrans = GST_BASE_TRANSFORM (alpha);
+
+  btrans->always_in_place = TRUE;
+}
+
+static GstCaps *
+gst_alpha_color_transform_caps (GstBaseTransform * btrans,
+    GstPadDirection direction, GstCaps * caps)
+{
+  GstAlphaColor *alpha;
+  GstCaps *result;
+
+  alpha = GST_ALPHA_COLOR (btrans);
+
+  GST_DEBUG ("transforming direction %d caps %s", direction,
+      gst_caps_to_string (caps));
+  result = gst_caps_new_simple ("video/x-raw-yuv",
+      "format", GST_TYPE_FOURCC, GST_MAKE_FOURCC ('A', 'Y', 'U', 'V'),
+      "width", GST_TYPE_INT_RANGE, 16, 4096,
+      "height", GST_TYPE_INT_RANGE, 16, 4096,
+      "framerate", GST_TYPE_DOUBLE_RANGE, 0.0, G_MAXDOUBLE, NULL);
+
+  return result;
+}
+
+static gboolean
+gst_alpha_color_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
+    GstCaps * outcaps)
+{
+  GstAlphaColor *alpha;
+  GstStructure *structure;
+  gboolean ret;
+  gdouble fps;
+  gint red_mask;
+
+  alpha = GST_ALPHA_COLOR (btrans);
+  structure = gst_caps_get_structure (incaps, 0);
+
+  ret = gst_structure_get_int (structure, "width", &alpha->in_width);
+  ret &= gst_structure_get_int (structure, "height", &alpha->in_height);
+  ret &= gst_structure_get_double (structure, "framerate", &fps);
+  ret &= gst_structure_get_int (structure, "red_mask", &red_mask);
+
+  if (!ret)
+    return FALSE;
+
+  alpha->in_rgba = TRUE;
+#if (G_BYTE_ORDER == G_BIG_ENDIAN)
+  if (red_mask != 0x000000ff)
+#else
+  if (red_mask != 0x00ff0000)
+#endif
+    alpha->in_rgba = FALSE;
+
+  return TRUE;
+}
+
+static void
+transform_rgb (guint8 * data, gint size)
+{
+  guint8 y, u, v;
+
+  while (size > 0) {
+    y = data[0] * 0.299 + data[1] * 0.587 + data[2] * 0.114 + 0;
+    u = data[0] * -0.169 + data[1] * -0.332 + data[2] * 0.500 + 128;
+    v = data[0] * 0.500 + data[1] * -0.419 + data[2] * -0.0813 + 128;
+
+    data[0] = data[3];
+    data[1] = y;
+    data[2] = u;
+    data[3] = v;
+
+    data += 4;
+    size -= 4;
+  }
+}
+
+static void
+transform_bgr (guint8 * data, gint size)
+{
+  guint8 y, u, v;
+
+  while (size > 0) {
+    y = data[2] * 0.299 + data[1] * 0.587 + data[0] * 0.114 + 0;
+    u = data[2] * -0.169 + data[1] * -0.332 + data[0] * 0.500 + 128;
+    v = data[2] * 0.500 + data[1] * -0.419 + data[0] * -0.0813 + 128;
+
+    data[0] = data[3];
+    data[1] = y;
+    data[2] = u;
+    data[3] = v;
+
+    data += 4;
+    size -= 4;
+  }
+}
+
+static GstFlowReturn
+gst_alpha_color_transform_ip (GstBaseTransform * btrans, GstBuffer * inbuf)
+{
+  GstFlowReturn ret = GST_FLOW_OK;
+  GstAlphaColor *alpha;
+
+  alpha = GST_ALPHA_COLOR (btrans);
+
+  /* Transform in place */
+  if (alpha->in_rgba)
+    transform_rgb (GST_BUFFER_DATA (inbuf), GST_BUFFER_SIZE (inbuf));
+  else
+    transform_bgr (GST_BUFFER_DATA (inbuf), GST_BUFFER_SIZE (inbuf));
+
+  return ret;
+}
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+  return gst_element_register (plugin, "alphacolor", GST_RANK_NONE,
+      GST_TYPE_ALPHA_COLOR);
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+    GST_VERSION_MINOR,
+    "alphacolor",
+    "RGB->YUV colorspace conversion preserving the alpha channels",
+    plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN)