--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/gst_plugins_good/gst/alpha/gstalphacolor.c Fri Apr 16 15:15:52 2010 +0300
@@ -0,0 +1,279 @@
+/* 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.
+ */
+
+/**
+ * SECTION:element-alphacolor
+ *
+ * The alphacolor element does memory-efficient (in-place) colourspace
+ * conversion from RGBA to AYUV, preserving the alpha channel.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstalphacolor.h"
+
+#include <gst/gst.h>
+#include <gst/video/video.h>
+
+#include <string.h>
+
+GST_DEBUG_CATEGORY_STATIC (alpha_color_debug);
+#define GST_CAT_DEFAULT alpha_color_debug
+
+/* elementfactory information */
+static const GstElementDetails gst_alpha_color_details =
+GST_ELEMENT_DETAILS ("Alpha color filter",
+ "Filter/Effect/Video",
+ "RGBA to AYUV colorspace conversion preserving the alpha channel",
+ "Wim Taymans <wim@fluendo.com>");
+
+static GstStaticPadTemplate 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 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 (&sink_template));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&src_template));
+}
+
+static void
+gst_alpha_color_class_init (GstAlphaColorClass * klass)
+{
+ GstBaseTransformClass *gstbasetransform_class;
+
+ 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)
+{
+ const GstCaps *tmpl_caps = NULL;
+ GstCaps *result = NULL, *local_caps = NULL;
+ guint i;
+
+ local_caps = gst_caps_copy (caps);
+
+ for (i = 0; i < gst_caps_get_size (local_caps); i++) {
+ GstStructure *structure = gst_caps_get_structure (local_caps, i);
+
+ /* Throw away the structure name and set it to transformed format */
+ if (direction == GST_PAD_SINK) {
+ gst_structure_set_name (structure, "video/x-raw-yuv");
+ } else if (direction == GST_PAD_SRC) {
+ gst_structure_set_name (structure, "video/x-raw-rgb");
+ }
+ /* Remove any specific parameter from the structure */
+ gst_structure_remove_field (structure, "format");
+ gst_structure_remove_field (structure, "endianness");
+ gst_structure_remove_field (structure, "depth");
+ gst_structure_remove_field (structure, "bpp");
+ gst_structure_remove_field (structure, "red_mask");
+ gst_structure_remove_field (structure, "green_mask");
+ gst_structure_remove_field (structure, "blue_mask");
+ gst_structure_remove_field (structure, "alpha_mask");
+ }
+
+ /* Get the appropriate template */
+ if (direction == GST_PAD_SINK) {
+ tmpl_caps = gst_static_pad_template_get_caps (&src_template);
+ } else if (direction == GST_PAD_SRC) {
+ tmpl_caps = gst_static_pad_template_get_caps (&sink_template);
+ }
+
+ /* Intersect with our template caps */
+ result = gst_caps_intersect (local_caps, tmpl_caps);
+
+ gst_caps_unref (local_caps);
+ gst_caps_do_simplify (result);
+
+ GST_LOG ("transformed %" GST_PTR_FORMAT " to %" GST_PTR_FORMAT, caps, result);
+
+ return result;
+}
+
+static gboolean
+gst_alpha_color_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
+ GstCaps * outcaps)
+{
+ GstAlphaColor *alpha;
+ GstStructure *structure;
+ gboolean ret;
+ const GValue *fps;
+ gint red_mask, alpha_mask;
+ gint w, h, depth, bpp;
+
+ alpha = GST_ALPHA_COLOR (btrans);
+ structure = gst_caps_get_structure (incaps, 0);
+
+ ret = gst_structure_get_int (structure, "width", &w);
+ ret &= gst_structure_get_int (structure, "height", &h);
+ fps = gst_structure_get_value (structure, "framerate");
+ ret &= (fps != NULL && GST_VALUE_HOLDS_FRACTION (fps));
+ ret &= gst_structure_get_int (structure, "red_mask", &red_mask);
+
+ /* make sure these are really full RGBA caps */
+ ret &= gst_structure_get_int (structure, "alpha_mask", &alpha_mask);
+ ret &= gst_structure_get_int (structure, "depth", &depth);
+ ret &= gst_structure_get_int (structure, "bpp", &bpp);
+
+ if (!ret || alpha_mask == 0 || red_mask == 0 || depth != 32 || bpp != 32) {
+ GST_DEBUG_OBJECT (alpha, "incomplete or non-RGBA input caps!");
+ return FALSE;
+ }
+
+ alpha->in_width = w;
+ alpha->in_height = h;
+ alpha->in_rgba = TRUE;
+#if (G_BYTE_ORDER == G_BIG_ENDIAN)
+ if (red_mask != 0x000000ff)
+#else
+ if (red_mask != 0xff000000)
+#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",
+ "RGBA to AYUV colorspace conversion preserving the alpha channel",
+ plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
+
+
+#ifdef __SYMBIAN32__
+EXPORT_C GstPluginDesc* _GST_PLUGIN_DESC()
+{
+ return &gst_plugin_desc;
+}
+
+#endif