sys/glsink/gstvideo-common.*: Pull together some common raw video functions into one location.

Original commit message from CVS:
* sys/glsink/gstvideo-common.c:
* sys/glsink/gstvideo-common.h:
Pull together some common raw video functions into one location.
This should eventually move to -base.
* sys/glsink/Makefile.am:
* sys/glsink/glimagesink.c:
* sys/glsink/glimagesink.h:
* sys/glsink/glvideo.c:
* sys/glsink/glvideo.h:
* sys/glsink/gstopengl.c:
Use the new video-common.h stuff.  Readd support for RGB video.

8 files changed, 785 insertions, 108 deletions

diff --git a/sys/glsink/Makefile.am b/sys/glsink/Makefile.am
index 92b59c67..9fa4d11c 100644
--- a/sys/glsink/Makefile.am
+++ b/sys/glsink/Makefile.am
@@ -1,7 +1,14 @@
 
 plugin_LTLIBRARIES = libgstglimagesink.la
 
-libgstglimagesink_la_SOURCES =  glimagesink.c glvideo.c
+libgstglimagesink_la_SOURCES = \
+	glimagesink.h \
+	glimagesink.c \
+	glvideo.c \
+	glvideo.h \
+	gstopengl.c \
+	gstvideo-common.h \
+	gstvideo-common.c
 libgstglimagesink_la_CFLAGS = $(GST_CFLAGS) $(X_CFLAGS) $(GST_BASE_CFLAGS) \
 	$(GST_PLUGINS_BASE_CFLAGS)
 libgstglimagesink_la_LIBADD = $(X_LIBS) $(XSHM_LIBS) -lGL \
diff --git a/sys/glsink/glimagesink.c b/sys/glsink/glimagesink.c
index e41fbca2..ae93df86 100644
--- a/sys/glsink/glimagesink.c
+++ b/sys/glsink/glimagesink.c
@@ -30,50 +30,11 @@
 
 #include <string.h>
 
-#include "glvideo.h"
+#include <glimagesink.h>
 
-GST_DEBUG_CATEGORY_STATIC (gst_debug_glimage_sink);
+GST_DEBUG_CATEGORY (gst_debug_glimage_sink);
 #define GST_CAT_DEFAULT gst_debug_glimage_sink
 
-#define GST_TYPE_GLIMAGE_SINK \
-    (gst_glimage_sink_get_type())
-#define GST_GLIMAGE_SINK(obj) \
-    (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GLIMAGE_SINK,GstGLImageSink))
-#define GST_GLIMAGE_SINK_CLASS(klass) \
-    (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GLIMAGE_SINK,GstGLImageSinkClass))
-#define GST_IS_GLIMAGE_SINK(obj) \
-    (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GLIMAGE_SINK))
-#define GST_IS_GLIMAGE_SINK_CLASS(klass) \
-    (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GLIMAGE_SINK))
-
-typedef struct _GstGLImageSink GstGLImageSink;
-typedef struct _GstGLImageSinkClass GstGLImageSinkClass;
-
-struct _GstGLImageSink
-{
-  GstVideoSink video_sink;
-
-  /* properties */
-  char *display_name;
-
-  /* caps */
-  GstCaps *caps;
-  int fps_n, fps_d;
-  int par_n, par_d;
-
-  GLVideoDisplay *display;
-  GLVideoDrawable *drawable;
-  GLVideoImageType type;
-
-  XID window_id;
-};
-
-struct _GstGLImageSinkClass
-{
-  GstVideoSinkClass video_sink_class;
-
-};
-
 static void gst_glimage_sink_init_interfaces (GType type);
 
 static void gst_glimage_sink_finalize (GObject * object);
@@ -421,12 +382,12 @@ gst_glimage_sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
 {
   GstGLImageSink *glimage_sink;
   GstCaps *intersection;
-  GstStructure *structure;
   int width;
   int height;
-  gboolean ret;
-  const GValue *fps;
-  const GValue *par;
+  gboolean ok;
+  int fps_n, fps_d;
+  int par_n, par_d;
+  GstVideoFormat format;
 
   GST_DEBUG ("set caps with %" GST_PTR_FORMAT, caps);
 
@@ -440,51 +401,36 @@ gst_glimage_sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
 
   gst_caps_unref (intersection);
 
-  structure = gst_caps_get_structure (caps, 0);
-  ret = gst_structure_get_int (structure, "width", &width);
-  ret &= gst_structure_get_int (structure, "height", &height);
-  fps = gst_structure_get_value (structure, "framerate");
-  ret &= (fps != NULL);
-  par = gst_structure_get_value (structure, "pixel-aspect-ratio");
+  ok = gst_video_parse_caps (caps, &format, &width, &height);
+  ok &= gst_video_parse_caps_framerate (caps, &fps_n, &fps_d);
+  ok &= gst_video_parse_caps_pixel_aspect_ratio (caps, &par_n, &par_d);
 
-  if (!ret)
+  if (!ok)
     return FALSE;
 
-  glimage_sink->fps_n = gst_value_get_fraction_numerator (fps);
-  glimage_sink->fps_d = gst_value_get_fraction_denominator (fps);
-  if (par) {
-    glimage_sink->par_n = gst_value_get_fraction_numerator (par);
-    glimage_sink->par_d = gst_value_get_fraction_denominator (par);
-  } else {
-    glimage_sink->par_n = 1;
-    glimage_sink->par_d = 1;
-  }
-
   GST_VIDEO_SINK_WIDTH (glimage_sink) = width;
   GST_VIDEO_SINK_HEIGHT (glimage_sink) = height;
-
-  if (strcmp (gst_structure_get_name (structure), "video/x-raw-rgb") == 0) {
-    int red_mask;
-
-    GST_DEBUG ("using RGB");
-    gst_structure_get_int (structure, "red_mask", &red_mask);
-
-    if (red_mask == 0xff000000) {
-      glimage_sink->type = GLVIDEO_IMAGE_TYPE_RGBA;
-    } else {
-      glimage_sink->type = GLVIDEO_IMAGE_TYPE_BGRA;
-    }
-  } else {
-    unsigned int fourcc;
-
-    GST_DEBUG ("using YUV");
-
-    gst_structure_get_fourcc (structure, "format", &fourcc);
-    if (fourcc == GST_MAKE_FOURCC ('Y', 'U', 'Y', '2')) {
+  glimage_sink->format = format;
+  glimage_sink->fps_n = fps_n;
+  glimage_sink->fps_d = fps_d;
+  glimage_sink->par_n = par_n;
+  glimage_sink->par_d = par_d;
+
+  switch (format) {
+    case GST_VIDEO_FORMAT_YUY2:
       glimage_sink->type = GLVIDEO_IMAGE_TYPE_YUY2;
-    } else {
+      break;
+    case GST_VIDEO_FORMAT_UYVY:
       glimage_sink->type = GLVIDEO_IMAGE_TYPE_UYVY;
-    }
+      break;
+    case GST_VIDEO_FORMAT_RGBx:
+      glimage_sink->type = GLVIDEO_IMAGE_TYPE_RGBx;
+      break;
+    case GST_VIDEO_FORMAT_BGRx:
+      glimage_sink->type = GLVIDEO_IMAGE_TYPE_BGRx;
+      break;
+    default:
+      break;
   }
 
 #if 0
@@ -632,23 +578,3 @@ gst_glimage_sink_update_caps (GstGLImageSink * glimage_sink)
 
   gst_caps_replace (&glimage_sink->caps, caps);
 }
-
-
-static gboolean
-plugin_init (GstPlugin * plugin)
-{
-  if (!gst_element_register (plugin, "glimagesink",
-          GST_RANK_MARGINAL, GST_TYPE_GLIMAGE_SINK))
-    return FALSE;
-
-  GST_DEBUG_CATEGORY_INIT (gst_debug_glimage_sink, "glimagesink", 0,
-      "glimagesink element");
-
-  return TRUE;
-}
-
-GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
-    GST_VERSION_MINOR,
-    "glimagesink",
-    "OpenGL video output plugin",
-    plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
diff --git a/sys/glsink/glimagesink.h b/sys/glsink/glimagesink.h
new file mode 100644
index 00000000..b9ae52a5
--- /dev/null
+++ b/sys/glsink/glimagesink.h
@@ -0,0 +1,77 @@
+/* GStreamer
+ * Copyright (C) 2003 Julien Moutte <julien@moutte.net>
+ * Copyright (C) 2005,2006,2007 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.
+ */
+
+#ifndef _GLIMAGESINK_H_
+#define _GLIMAGESINK_H_
+
+#include <gst/gst.h>
+#include <gst/interfaces/xoverlay.h>
+#include <gst/video/gstvideosink.h>
+#include <gst/video/video.h>
+
+#include "glvideo.h"
+#include <gstvideo-common.h>
+
+GST_DEBUG_CATEGORY_EXTERN (gst_debug_glimage_sink);
+
+#define GST_TYPE_GLIMAGE_SINK \
+    (gst_glimage_sink_get_type())
+#define GST_GLIMAGE_SINK(obj) \
+    (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GLIMAGE_SINK,GstGLImageSink))
+#define GST_GLIMAGE_SINK_CLASS(klass) \
+    (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GLIMAGE_SINK,GstGLImageSinkClass))
+#define GST_IS_GLIMAGE_SINK(obj) \
+    (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GLIMAGE_SINK))
+#define GST_IS_GLIMAGE_SINK_CLASS(klass) \
+    (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GLIMAGE_SINK))
+
+typedef struct _GstGLImageSink GstGLImageSink;
+typedef struct _GstGLImageSinkClass GstGLImageSinkClass;
+
+struct _GstGLImageSink
+{
+  GstVideoSink video_sink;
+
+  /* properties */
+  char *display_name;
+
+  /* caps */
+  GstCaps *caps;
+  GstVideoFormat format;
+  int fps_n, fps_d;
+  int par_n, par_d;
+
+  GLVideoDisplay *display;
+  GLVideoDrawable *drawable;
+  GLVideoImageType type;
+
+  XID window_id;
+};
+
+struct _GstGLImageSinkClass
+{
+  GstVideoSinkClass video_sink_class;
+
+};
+
+GType gst_glimage_sink_get_type(void);
+
+#endif
+
diff --git a/sys/glsink/glvideo.c b/sys/glsink/glvideo.c
index 93a239db..169f41c6 100644
--- a/sys/glsink/glvideo.c
+++ b/sys/glsink/glvideo.c
@@ -328,13 +328,13 @@ glv_drawable_draw_image (GLVideoDrawable * drawable, GLVideoImageType type,
   glTexEnvi (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 
   switch (type) {
-    case GLVIDEO_IMAGE_TYPE_RGBA:
+    case GLVIDEO_IMAGE_TYPE_RGBx:
       glTexImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, width, height,
           0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
       glTexSubImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, 0, 0, width, height,
           GL_RGBA, GL_UNSIGNED_BYTE, data);
       break;
-    case GLVIDEO_IMAGE_TYPE_BGRA:
+    case GLVIDEO_IMAGE_TYPE_BGRx:
       glTexImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, width, height,
           0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
       glTexSubImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, 0, 0, width, height,
@@ -351,6 +351,7 @@ glv_drawable_draw_image (GLVideoDrawable * drawable, GLVideoImageType type,
           0, GL_YCBCR_MESA, GL_UNSIGNED_SHORT_8_8_REV_MESA, NULL);
       glTexSubImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, 0, 0, width, height,
           GL_YCBCR_MESA, GL_UNSIGNED_SHORT_8_8_MESA, data);
+      break;
     default:
       g_assert_not_reached ();
   }
diff --git a/sys/glsink/glvideo.h b/sys/glsink/glvideo.h
index 7e2f6b13..67a255e1 100644
--- a/sys/glsink/glvideo.h
+++ b/sys/glsink/glvideo.h
@@ -10,8 +10,8 @@ typedef struct _GLVideoDisplay GLVideoDisplay;
 typedef struct _GLVideoDrawable GLVideoDrawable;
 
 typedef enum {
-  GLVIDEO_IMAGE_TYPE_RGBA,
-  GLVIDEO_IMAGE_TYPE_BGRA,
+  GLVIDEO_IMAGE_TYPE_RGBx,
+  GLVIDEO_IMAGE_TYPE_BGRx,
   GLVIDEO_IMAGE_TYPE_YUY2,
   GLVIDEO_IMAGE_TYPE_UYVY,
 } GLVideoImageType;
diff --git a/sys/glsink/gstopengl.c b/sys/glsink/gstopengl.c
new file mode 100644
index 00000000..2592aff0
--- /dev/null
+++ b/sys/glsink/gstopengl.c
@@ -0,0 +1,53 @@
+/* GStreamer
+ * Copyright (C) 2003 Julien Moutte <julien@moutte.net>
+ * Copyright (C) 2005,2006,2007 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/interfaces/xoverlay.h>
+#include <gst/video/gstvideosink.h>
+#include <gst/video/video.h>
+
+#include <string.h>
+
+#include <glimagesink.h>
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+  GST_DEBUG_CATEGORY_INIT (gst_debug_glimage_sink, "glimagesink", 0,
+      "glimagesink element");
+
+  if (!gst_element_register (plugin, "glimagesink",
+          GST_RANK_MARGINAL, GST_TYPE_GLIMAGE_SINK)) {
+    return FALSE;
+  }
+
+  return TRUE;
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+    GST_VERSION_MINOR,
+    "glimagesink",
+    "OpenGL video output plugin",
+    plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
diff --git a/sys/glsink/gstvideo-common.c b/sys/glsink/gstvideo-common.c
new file mode 100644
index 00000000..5907b3c2
--- /dev/null
+++ b/sys/glsink/gstvideo-common.c
@@ -0,0 +1,560 @@
+/* gstvideo-common.c
+ * Copyright (C) 2007 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 <gstvideo-common.h>
+
+
+gboolean
+gst_video_parse_caps (GstCaps * caps, GstVideoFormat * format, int *width,
+    int *height)
+{
+  GstStructure *structure;
+  gboolean ok = TRUE;
+
+  if (!gst_caps_is_fixed (caps))
+    return FALSE;
+
+  structure = gst_caps_get_structure (caps, 0);
+
+  if (format) {
+    if (gst_structure_has_name (structure, "video/x-raw-yuv")) {
+      guint32 fourcc;
+
+      ok &= gst_structure_get_fourcc (structure, "format", &fourcc);
+
+      *format = gst_video_fourcc_to_format (fourcc);
+      if (*format == GST_VIDEO_FORMAT_UNKNOWN) {
+        ok = FALSE;
+      }
+    } else if (gst_structure_has_name (structure, "video/x-raw-rgb")) {
+      int depth;
+      int bpp;
+      int endianness;
+      int red_mask;
+      int green_mask;
+      int blue_mask;
+
+      ok &= gst_structure_get_int (structure, "depth", &depth);
+      ok &= gst_structure_get_int (structure, "bpp", &bpp);
+      ok &= gst_structure_get_int (structure, "endianness", &endianness);
+      ok &= gst_structure_get_int (structure, "red_mask", &red_mask);
+      ok &= gst_structure_get_int (structure, "green_mask", &green_mask);
+      ok &= gst_structure_get_int (structure, "blue_mask", &blue_mask);
+
+      if (depth != 24 || bpp != 32 || endianness != G_BIG_ENDIAN) {
+        ok = FALSE;
+      } else {
+        *format = gst_video_rgb32_masks_to_format (red_mask, green_mask,
+            blue_mask);
+        if (*format == GST_VIDEO_FORMAT_UNKNOWN) {
+          ok = FALSE;
+        }
+      }
+    } else {
+      ok = FALSE;
+    }
+  }
+
+  if (width) {
+    ok &= gst_structure_get_int (structure, "width", width);
+  }
+
+  if (height) {
+    ok &= gst_structure_get_int (structure, "height", height);
+  }
+
+  return ok;
+}
+
+gboolean
+gst_video_parse_caps_framerate (GstCaps * caps, int *fps_n, int *fps_d)
+{
+  GstStructure *structure;
+
+  if (!gst_caps_is_fixed (caps))
+    return FALSE;
+
+  structure = gst_caps_get_structure (caps, 0);
+
+  return gst_structure_get_fraction (structure, "framerate", fps_n, fps_d);
+}
+
+gboolean
+gst_video_parse_caps_pixel_aspect_ratio (GstCaps * caps, int *par_n, int *par_d)
+{
+  GstStructure *structure;
+
+  if (!gst_caps_is_fixed (caps))
+    return FALSE;
+
+  structure = gst_caps_get_structure (caps, 0);
+
+  if (!gst_structure_get_fraction (structure, "pixel-aspect-ratio",
+          par_n, par_d)) {
+    *par_n = 1;
+    *par_d = 1;
+  }
+  return TRUE;
+}
+
+GstCaps *
+gst_video_create_caps (GstVideoFormat format, int width, int height,
+    int framerate_n, int framerate_d, int par_n, int par_d)
+{
+  if (gst_video_format_is_yuv (format)) {
+    return gst_caps_new_simple ("video/x-raw-yuv",
+        "format", GST_TYPE_FOURCC, gst_video_format_to_fourcc (format),
+        "width", G_TYPE_INT, width,
+        "height", G_TYPE_INT, height,
+        "framerate", GST_TYPE_FRACTION, framerate_n, framerate_d,
+        "pixel-aspect-ratio", GST_TYPE_FRACTION, par_n, par_d, NULL);
+  }
+  if (gst_video_format_is_rgb (format)) {
+    int red_mask;
+    int blue_mask;
+    int green_mask;
+
+    red_mask =
+        0xff000000U >> gst_video_format_get_component_offset (format, 0, width,
+        height);
+    green_mask =
+        0xff000000U >> gst_video_format_get_component_offset (format, 1, width,
+        height);
+    blue_mask =
+        0xff000000U >> gst_video_format_get_component_offset (format, 2, width,
+        height);
+
+    return gst_caps_new_simple ("video/x-raw-rgb",
+        "bpp", G_TYPE_INT, 32,
+        "depth", G_TYPE_INT, 24,
+        "endianness", G_TYPE_INT, G_BIG_ENDIAN,
+        "red_mask", G_TYPE_INT, red_mask,
+        "green_mask", G_TYPE_INT, green_mask,
+        "blue_mask", G_TYPE_INT, blue_mask,
+        "width", G_TYPE_INT, width,
+        "height", G_TYPE_INT, height,
+        "framerate", GST_TYPE_FRACTION, framerate_n, framerate_d,
+        "pixel-aspect-ratio", GST_TYPE_FRACTION, par_n, par_d, NULL);
+  }
+  return NULL;
+}
+
+GstVideoFormat
+gst_video_fourcc_to_format (guint32 fourcc)
+{
+  switch (fourcc) {
+    case GST_MAKE_FOURCC ('I', '4', '2', '0'):
+      return GST_VIDEO_FORMAT_I420;
+    case GST_MAKE_FOURCC ('Y', 'V', '1', '2'):
+      return GST_VIDEO_FORMAT_YV12;
+    case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'):
+      return GST_VIDEO_FORMAT_YUY2;
+    case GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'):
+      return GST_VIDEO_FORMAT_UYVY;
+    case GST_MAKE_FOURCC ('A', 'Y', 'U', 'V'):
+      return GST_VIDEO_FORMAT_AYUV;
+    default:
+      return GST_VIDEO_FORMAT_UNKNOWN;
+  }
+}
+
+guint32
+gst_video_format_to_fourcc (GstVideoFormat format)
+{
+  switch (format) {
+    case GST_VIDEO_FORMAT_I420:
+      return GST_MAKE_FOURCC ('I', '4', '2', '0');
+    case GST_VIDEO_FORMAT_YV12:
+      return GST_MAKE_FOURCC ('Y', 'V', '1', '2');
+    case GST_VIDEO_FORMAT_YUY2:
+      return GST_MAKE_FOURCC ('Y', 'U', 'Y', '2');
+    case GST_VIDEO_FORMAT_UYVY:
+      return GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y');
+    case GST_VIDEO_FORMAT_AYUV:
+      return GST_MAKE_FOURCC ('A', 'Y', 'U', 'V');
+    default:
+      return 0;
+  }
+}
+
+GstVideoFormat
+gst_video_rgb32_masks_to_format (int red_mask, int green_mask, int blue_mask)
+{
+  if (red_mask == 0xff000000 && green_mask == 0x00ff0000 &&
+      blue_mask == 0x0000ff00) {
+    return GST_VIDEO_FORMAT_RGBx;
+  }
+  if (red_mask == 0x0000ff00 && green_mask == 0x00ff0000 &&
+      blue_mask == 0xff000000) {
+    return GST_VIDEO_FORMAT_BGRx;
+  }
+
+  return GST_VIDEO_FORMAT_UNKNOWN;
+}
+
+gboolean
+gst_video_format_is_rgb (GstVideoFormat format)
+{
+  switch (format) {
+    case GST_VIDEO_FORMAT_I420:
+    case GST_VIDEO_FORMAT_YV12:
+    case GST_VIDEO_FORMAT_YUY2:
+    case GST_VIDEO_FORMAT_UYVY:
+    case GST_VIDEO_FORMAT_AYUV:
+      return FALSE;
+    case GST_VIDEO_FORMAT_RGBx:
+    case GST_VIDEO_FORMAT_BGRx:
+      return TRUE;
+    default:
+      return FALSE;
+  }
+}
+
+gboolean
+gst_video_format_is_yuv (GstVideoFormat format)
+{
+  switch (format) {
+    case GST_VIDEO_FORMAT_I420:
+    case GST_VIDEO_FORMAT_YV12:
+    case GST_VIDEO_FORMAT_YUY2:
+    case GST_VIDEO_FORMAT_UYVY:
+    case GST_VIDEO_FORMAT_AYUV:
+      return TRUE;
+    case GST_VIDEO_FORMAT_RGBx:
+    case GST_VIDEO_FORMAT_BGRx:
+      return FALSE;
+    default:
+      return FALSE;
+  }
+}
+
+gboolean
+gst_video_format_has_alpha (GstVideoFormat format)
+{
+  switch (format) {
+    case GST_VIDEO_FORMAT_I420:
+    case GST_VIDEO_FORMAT_YV12:
+    case GST_VIDEO_FORMAT_YUY2:
+    case GST_VIDEO_FORMAT_UYVY:
+      return FALSE;
+    case GST_VIDEO_FORMAT_AYUV:
+      return TRUE;
+    case GST_VIDEO_FORMAT_RGBx:
+    case GST_VIDEO_FORMAT_BGRx:
+      return FALSE;
+    default:
+      return FALSE;
+  }
+}
+
+int
+gst_video_format_get_row_stride (GstVideoFormat format, int component,
+    int width)
+{
+  switch (format) {
+    case GST_VIDEO_FORMAT_I420:
+    case GST_VIDEO_FORMAT_YV12:
+      if (component == 0) {
+        return GST_ROUND_UP_4 (width);
+      } else {
+        return GST_ROUND_UP_4 (GST_ROUND_UP_2 (width) / 2);
+      }
+    case GST_VIDEO_FORMAT_YUY2:
+    case GST_VIDEO_FORMAT_UYVY:
+      return GST_ROUND_UP_4 (width * 2);
+    case GST_VIDEO_FORMAT_AYUV:
+    case GST_VIDEO_FORMAT_RGBx:
+    case GST_VIDEO_FORMAT_BGRx:
+      return width * 4;
+    default:
+      return 0;
+  }
+}
+
+int
+gst_video_format_get_pixel_stride (GstVideoFormat format, int component)
+{
+  switch (format) {
+    case GST_VIDEO_FORMAT_I420:
+    case GST_VIDEO_FORMAT_YV12:
+      return 1;
+    case GST_VIDEO_FORMAT_YUY2:
+    case GST_VIDEO_FORMAT_UYVY:
+      if (component == 0) {
+        return 2;
+      } else {
+        return 4;
+      }
+    case GST_VIDEO_FORMAT_AYUV:
+    case GST_VIDEO_FORMAT_RGBx:
+    case GST_VIDEO_FORMAT_BGRx:
+      return 4;
+    default:
+      return 0;
+  }
+}
+
+int
+gst_video_format_get_component_width (GstVideoFormat format, int component,
+    int width)
+{
+  switch (format) {
+    case GST_VIDEO_FORMAT_I420:
+    case GST_VIDEO_FORMAT_YV12:
+    case GST_VIDEO_FORMAT_YUY2:
+    case GST_VIDEO_FORMAT_UYVY:
+      if (component == 0) {
+        return width;
+      } else {
+        return GST_ROUND_UP_2 (width) / 2;
+      }
+    case GST_VIDEO_FORMAT_AYUV:
+    case GST_VIDEO_FORMAT_RGBx:
+    case GST_VIDEO_FORMAT_BGRx:
+      return width;
+    default:
+      return 0;
+  }
+}
+
+int
+gst_video_format_get_component_height (GstVideoFormat format, int component,
+    int height)
+{
+  switch (format) {
+    case GST_VIDEO_FORMAT_I420:
+    case GST_VIDEO_FORMAT_YV12:
+      if (component == 0) {
+        return height;
+      } else {
+        return GST_ROUND_UP_2 (height) / 2;
+      }
+    case GST_VIDEO_FORMAT_YUY2:
+    case GST_VIDEO_FORMAT_UYVY:
+    case GST_VIDEO_FORMAT_AYUV:
+    case GST_VIDEO_FORMAT_RGBx:
+    case GST_VIDEO_FORMAT_BGRx:
+      return height;
+    default:
+      return 0;
+  }
+}
+
+int
+gst_video_format_get_component_offset (GstVideoFormat format, int component,
+    int width, int height)
+{
+  switch (format) {
+    case GST_VIDEO_FORMAT_I420:
+    case GST_VIDEO_FORMAT_YV12:
+      if (component == 0) {
+        return 0;
+      } else {
+        int offset;
+
+        offset = GST_ROUND_UP_4 (width) * GST_ROUND_UP_2 (height);
+        if (component == 2) {
+          offset += GST_ROUND_UP_4 (GST_ROUND_UP_2 (width) / 2) *
+              (GST_ROUND_UP_2 (height) / 2);
+        }
+        return offset;
+      }
+    case GST_VIDEO_FORMAT_YUY2:
+      if (component == 0)
+        return 0;
+      if (component == 1)
+        return 1;
+      if (component == 2)
+        return 3;
+      return 0;
+    case GST_VIDEO_FORMAT_UYVY:
+      if (component == 0)
+        return 1;
+      if (component == 1)
+        return 0;
+      if (component == 2)
+        return 2;
+      return 0;
+    case GST_VIDEO_FORMAT_AYUV:
+      if (component == 0)
+        return 1;
+      if (component == 1)
+        return 2;
+      if (component == 2)
+        return 3;
+      if (component == 3)
+        return 0;
+      return 0;
+    case GST_VIDEO_FORMAT_RGBx:
+      if (component == 0)
+        return 0;
+      if (component == 1)
+        return 1;
+      if (component == 2)
+        return 2;
+      if (component == 3)
+        return 3;
+      return 0;
+    case GST_VIDEO_FORMAT_BGRx:
+      if (component == 0)
+        return 2;
+      if (component == 1)
+        return 1;
+      if (component == 2)
+        return 0;
+      if (component == 3)
+        return 3;
+      return 0;
+    default:
+      return 0;
+  }
+}
+
+int
+gst_video_format_get_size (GstVideoFormat format, int width, int height)
+{
+  int size;
+
+  switch (format) {
+    case GST_VIDEO_FORMAT_I420:
+    case GST_VIDEO_FORMAT_YV12:
+      size = GST_ROUND_UP_4 (width) * GST_ROUND_UP_2 (height);
+      size += GST_ROUND_UP_4 (GST_ROUND_UP_2 (width) / 2) *
+          (GST_ROUND_UP_2 (height) / 2) * 2;
+      return size;
+    case GST_VIDEO_FORMAT_YUY2:
+    case GST_VIDEO_FORMAT_UYVY:
+      return GST_ROUND_UP_4 (width * 2) * height;
+    case GST_VIDEO_FORMAT_AYUV:
+    case GST_VIDEO_FORMAT_RGBx:
+    case GST_VIDEO_FORMAT_BGRx:
+      return width * 4 * height;
+    default:
+      return 0;
+  }
+}
+
+
+gboolean
+gst_video_convert (GstVideoFormat format, int width, int height,
+    int fps_n, int fps_d,
+    GstFormat src_format, gint64 src_value,
+    GstFormat dest_format, gint64 * dest_value)
+{
+  gboolean ret = FALSE;
+  int size;
+
+  size = gst_video_format_get_size (format, width, height);
+
+  GST_DEBUG ("converting value %" G_GINT64_FORMAT " from %s to %s",
+      src_value, gst_format_get_name (src_format),
+      gst_format_get_name (dest_format));
+
+  if (src_format == dest_format) {
+    *dest_value = src_value;
+    ret = TRUE;
+    goto done;
+  }
+
+  if (src_value == -1) {
+    *dest_value = -1;
+    ret = TRUE;
+    goto done;
+  }
+
+  /* bytes to frames */
+  if (src_format == GST_FORMAT_BYTES && dest_format == GST_FORMAT_DEFAULT) {
+    if (size != 0) {
+      *dest_value = gst_util_uint64_scale_int (src_value, 1, size);
+    } else {
+      GST_ERROR ("blocksize is 0");
+      *dest_value = 0;
+    }
+    ret = TRUE;
+    goto done;
+  }
+
+  /* frames to bytes */
+  if (src_format == GST_FORMAT_DEFAULT && dest_format == GST_FORMAT_BYTES) {
+    *dest_value = gst_util_uint64_scale_int (src_value, size, 1);
+    ret = TRUE;
+    goto done;
+  }
+
+  /* time to frames */
+  if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_DEFAULT) {
+    if (fps_d != 0) {
+      *dest_value = gst_util_uint64_scale (src_value,
+          fps_n, GST_SECOND * fps_d);
+    } else {
+      GST_ERROR ("framerate denominator is 0");
+      *dest_value = 0;
+    }
+    ret = TRUE;
+    goto done;
+  }
+
+  /* frames to time */
+  if (src_format == GST_FORMAT_DEFAULT && dest_format == GST_FORMAT_TIME) {
+    if (fps_n != 0) {
+      *dest_value = gst_util_uint64_scale (src_value,
+          GST_SECOND * fps_d, fps_n);
+    } else {
+      GST_ERROR ("framerate numerator is 0");
+      *dest_value = 0;
+    }
+    ret = TRUE;
+    goto done;
+  }
+
+  /* time to bytes */
+  if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_BYTES) {
+    if (fps_d != 0) {
+      *dest_value = gst_util_uint64_scale (src_value,
+          fps_n * size, GST_SECOND * fps_d);
+    } else {
+      GST_ERROR ("framerate denominator is 0");
+      *dest_value = 0;
+    }
+    ret = TRUE;
+    goto done;
+  }
+
+  /* bytes to time */
+  if (src_format == GST_FORMAT_BYTES && dest_format == GST_FORMAT_TIME) {
+    if (fps_n != 0 && size != 0) {
+      *dest_value = gst_util_uint64_scale (src_value,
+          GST_SECOND * fps_d, fps_n * size);
+    } else {
+      GST_ERROR ("framerate denominator and/or blocksize is 0");
+      *dest_value = 0;
+    }
+    ret = TRUE;
+  }
+
+done:
+
+  GST_DEBUG ("ret=%d result %" G_GINT64_FORMAT, ret, *dest_value);
+
+  return ret;
+}
diff --git a/sys/glsink/gstvideo-common.h b/sys/glsink/gstvideo-common.h
new file mode 100644
index 00000000..1a4333f7
--- /dev/null
+++ b/sys/glsink/gstvideo-common.h
@@ -0,0 +1,53 @@
+
+#ifndef __GST_VIDEO_COMMON_H__
+#define __GST_VIDEO_COMMON_H__
+
+#include <gst/gst.h>
+#include <gst/video/video.h>
+
+typedef enum {
+  GST_VIDEO_FORMAT_UNKNOWN,
+  GST_VIDEO_FORMAT_I420,
+  GST_VIDEO_FORMAT_YV12,
+  GST_VIDEO_FORMAT_YUY2,
+  GST_VIDEO_FORMAT_UYVY,
+  GST_VIDEO_FORMAT_AYUV,
+  GST_VIDEO_FORMAT_RGBx,
+  GST_VIDEO_FORMAT_BGRx
+} GstVideoFormat;
+
+
+
+gboolean gst_video_parse_caps (GstCaps *caps, GstVideoFormat *format,
+    int *width, int *height);
+gboolean gst_video_parse_caps_framerate (GstCaps *caps,
+    int *fps_n, int *fps_d);
+gboolean gst_video_parse_caps_pixel_aspect_ratio (GstCaps *caps,
+    int *par_n, int *par_d);
+GstCaps * gst_video_create_caps (GstVideoFormat format,
+    int width, int height, int framerate_n, int framerate_d,
+    int par_n, int par_d);
+GstVideoFormat gst_video_fourcc_to_format (guint32 fourcc);
+guint32 gst_video_format_to_fourcc (GstVideoFormat format);
+GstVideoFormat gst_video_rgb32_masks_to_format (int red_mask, int green_mask, int blue_mask);
+gboolean gst_video_format_is_rgb (GstVideoFormat format);
+gboolean gst_video_format_is_yuv (GstVideoFormat format);
+gboolean gst_video_format_has_alpha (GstVideoFormat format);
+int gst_video_format_get_row_stride (GstVideoFormat format, int component,
+    int width);
+int gst_video_format_get_pixel_stride (GstVideoFormat format, int component);
+int gst_video_format_get_component_width (GstVideoFormat format, int component,
+    int width);
+int gst_video_format_get_component_height (GstVideoFormat format, int component,
+    int height);
+int gst_video_format_get_component_offset (GstVideoFormat format, int component,
+    int width, int height);
+int gst_video_format_get_size (GstVideoFormat format, int width, int height);
+gboolean gst_video_convert (GstVideoFormat format, int width, int height,
+    int fps_n, int fps_d,
+    GstFormat src_format, gint64 src_value,
+    GstFormat dest_format, gint64 * dest_value);
+
+#endif
+
+