path: root/media-libs/gst-plugins-base/files/gst-0.10.32-0002-stridetransform-skeletal-implementation-of-stridetra.patch

From 9820616aad713a23aa9d0e2afe44835d9e9278e5 Mon Sep 17 00:00:00 2001
From: Rob Clark <rob@ti.com>
Date: Thu, 30 Jul 2009 20:41:18 -0500
Subject: [PATCH 02/24] stridetransform: skeletal implementation of stridetransform element

---
 configure.ac                    |    2 +
 gst/stride/Makefile.am          |   15 ++++
 gst/stride/gststridetransform.c |  178 +++++++++++++++++++++++++++++++++++++++
 gst/stride/gststridetransform.h |   66 ++++++++++++++
 gst/stride/plugin.c             |   45 ++++++++++
 5 files changed, 306 insertions(+), 0 deletions(-)
 create mode 100644 gst/stride/Makefile.am
 create mode 100644 gst/stride/gststridetransform.c
 create mode 100644 gst/stride/gststridetransform.h
 create mode 100644 gst/stride/plugin.c

diff --git a/configure.ac b/configure.ac
index 3325abc..af6cd52 100644
--- a/configure.ac
+++ b/configure.ac
@@ -427,6 +427,7 @@ AG_GST_CHECK_PLUGIN(ffmpegcolorspace)
 AG_GST_CHECK_PLUGIN(gdp)
 AG_GST_CHECK_PLUGIN(playback)
 AG_GST_CHECK_PLUGIN(audioresample)
+AG_GST_CHECK_PLUGIN(stride)
 AG_GST_CHECK_PLUGIN(subparse)
 AG_GST_CHECK_PLUGIN(tcp)
 AG_GST_CHECK_PLUGIN(typefind)
@@ -925,6 +926,7 @@ gst/ffmpegcolorspace/Makefile
 gst/gdp/Makefile
 gst/playback/Makefile
 gst/audioresample/Makefile
+gst/stride/Makefile
 gst/subparse/Makefile
 gst/tcp/Makefile
 gst/typefind/Makefile
diff --git a/gst/stride/Makefile.am b/gst/stride/Makefile.am
new file mode 100644
index 0000000..1adc197
--- /dev/null
+++ b/gst/stride/Makefile.am
@@ -0,0 +1,15 @@
+plugin_LTLIBRARIES = libgststridetransform.la
+
+libgststridetransform_la_SOURCES = \
+	gststridetransform.c \
+	plugin.c
+
+libgststridetransform_la_CFLAGS = $(GST_PLUGINS_BASE_CFLAGS) $(GST_BASE_CFLAGS) $(GST_CFLAGS)
+libgststridetransform_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
+libgststridetransform_la_LIBADD = \
+	$(top_builddir)/gst-libs/gst/video/libgstvideo-@GST_MAJORMINOR@.la \
+	$(GST_BASE_LIBS) $(GST_LIBS) $(LIBM)
+libgststridetransform_la_LIBTOOLFLAGS = --tag=disable-static
+
+noinst_HEADERS = \
+	gststridetransform.h
diff --git a/gst/stride/gststridetransform.c b/gst/stride/gststridetransform.c
new file mode 100644
index 0000000..21f2d6e
--- /dev/null
+++ b/gst/stride/gststridetransform.c
@@ -0,0 +1,178 @@
+/* GStreamer
+ *
+ * Copyright (C) 2009 Texas Instruments, Inc - http://www.ti.com/
+ *
+ * Description: V4L2 sink element
+ *  Created on: Jul 30, 2009
+ *      Author: Rob Clark <rob@ti.com>
+ *
+ * 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-stridetransform
+ *
+ * stridetransform can be used to convert between video buffers
+ * with and without stride, or between buffers with differing
+ * stride
+ *
+ * <refsect2>
+ * <title>Example launch lines</title>
+ * |[
+ * gst-launch ???? TODO
+ * ]| This pipeline ???? TODO
+ * </refsect2>
+ */
+
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "gststridetransform.h"
+#include "gst/gst-i18n-plugin.h"
+
+
+static const GstElementDetails stridetransform_details =
+GST_ELEMENT_DETAILS ("Stride transform",
+    "Filter/Converter/Video",
+    "Convert between video buffers with and without stride, or with differing stride",
+    "Rob Clark <rob@ti.com>,");
+
+GST_DEBUG_CATEGORY (stridetransform_debug);
+#define GST_CAT_DEFAULT stridetransform_debug
+
+/* type functions */
+static void gst_stride_transform_dispose (GObject * obj);
+
+/* GstBaseTransform functions */
+static gboolean gst_stride_transform_get_unit_size (GstBaseTransform * base,
+    GstCaps * caps, guint * size);
+static GstCaps *gst_stride_transform_transform_caps (GstBaseTransform * base,
+    GstPadDirection direction, GstCaps * caps);
+static void gst_stride_transform_fixate_caps (GstBaseTransform * base,
+    GstPadDirection direction, GstCaps * caps, GstCaps * othercaps);
+static gboolean gst_stride_transform_set_caps (GstBaseTransform * base,
+    GstCaps * incaps, GstCaps * outcaps);
+static GstFlowReturn gst_stride_transform_transform (GstBaseTransform * base,
+    GstBuffer * inbuf, GstBuffer * outbuf);
+static GstFlowReturn gst_stride_transform_transform_ip (GstBaseTransform * base,
+    GstBuffer * buf);
+
+GST_BOILERPLATE (GstStrideTransform, gst_stride_transform, GstVideoFilter, GST_TYPE_VIDEO_FILTER);
+
+
+static void
+gst_stride_transform_base_init (gpointer g_class)
+{
+  GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
+
+  GST_DEBUG_CATEGORY_INIT (stridetransform_debug, "stride", 0, "stride transform element");
+
+  gst_element_class_set_details (gstelement_class, &stridetransform_details);
+}
+
+static void
+gst_stride_transform_class_init (GstStrideTransformClass * klass)
+{
+  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+  GstBaseTransformClass *basetransform_class = GST_BASE_TRANSFORM_CLASS (klass);
+
+  gobject_class->dispose = gst_stride_transform_dispose;
+
+  basetransform_class->get_unit_size =
+      GST_DEBUG_FUNCPTR (gst_stride_transform_get_unit_size);
+  basetransform_class->transform_caps =
+      GST_DEBUG_FUNCPTR (gst_stride_transform_transform_caps);
+  basetransform_class->fixate_caps =
+      GST_DEBUG_FUNCPTR (gst_stride_transform_fixate_caps);
+  basetransform_class->set_caps =
+      GST_DEBUG_FUNCPTR (gst_stride_transform_set_caps);
+  basetransform_class->transform_ip =
+      GST_DEBUG_FUNCPTR (gst_stride_transform_transform_ip);
+  basetransform_class->transform =
+      GST_DEBUG_FUNCPTR (gst_stride_transform_transform);
+
+  basetransform_class->passthrough_on_same_caps = TRUE;
+}
+
+static void
+gst_stride_transform_init (GstStrideTransform * self, GstStrideTransformClass * klass)
+{
+  GST_DEBUG_OBJECT (self, "not implemented");
+}
+
+
+static void
+gst_stride_transform_dispose (GObject * object)
+{
+  GstStrideTransform *self = GST_STRIDE_TRANSFORM (object);
+  GST_DEBUG_OBJECT (self, "not implemented");
+  G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+static gboolean
+gst_stride_transform_get_unit_size (GstBaseTransform * base,
+    GstCaps * caps, guint * size)
+{
+  GstStrideTransform *self = GST_STRIDE_TRANSFORM (base);
+  GST_DEBUG_OBJECT (self, "not implemented");
+  return FALSE;
+}
+
+static GstCaps *
+gst_stride_transform_transform_caps (GstBaseTransform * base,
+    GstPadDirection direction, GstCaps * caps)
+{
+  GstStrideTransform *self = GST_STRIDE_TRANSFORM (base);
+  GST_DEBUG_OBJECT (self, "not implemented");
+  return NULL;
+}
+
+static void
+gst_stride_transform_fixate_caps (GstBaseTransform * base,
+    GstPadDirection direction, GstCaps * caps, GstCaps * othercaps)
+{
+  GstStrideTransform *self = GST_STRIDE_TRANSFORM (base);
+  GST_DEBUG_OBJECT (self, "not implemented");
+}
+
+static gboolean
+gst_stride_transform_set_caps (GstBaseTransform * base,
+    GstCaps * incaps, GstCaps * outcaps)
+{
+  GstStrideTransform *self = GST_STRIDE_TRANSFORM (base);
+  GST_DEBUG_OBJECT (self, "not implemented");
+  return FALSE;
+}
+
+static GstFlowReturn gst_stride_transform_transform (GstBaseTransform * base,
+    GstBuffer * inbuf, GstBuffer * outbuf)
+{
+  GstStrideTransform *self = GST_STRIDE_TRANSFORM (base);
+  GST_DEBUG_OBJECT (self, "not implemented");
+  return GST_FLOW_ERROR;
+}
+
+static GstFlowReturn
+gst_stride_transform_transform_ip (GstBaseTransform * base,
+    GstBuffer * buf)
+{
+  GstStrideTransform *self = GST_STRIDE_TRANSFORM (base);
+  GST_DEBUG_OBJECT (self, "not implemented");
+  return GST_FLOW_ERROR;
+}
diff --git a/gst/stride/gststridetransform.h b/gst/stride/gststridetransform.h
new file mode 100644
index 0000000..b4f7d59
--- /dev/null
+++ b/gst/stride/gststridetransform.h
@@ -0,0 +1,66 @@
+/* GStreamer
+ *
+ * Copyright (C) 2009 Texas Instruments, Inc - http://www.ti.com/
+ *
+ * Description: V4L2 sink element
+ *  Created on: Jul 2, 2009
+ *      Author: Rob Clark <rob@ti.com>
+ *
+ * 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 __GSTSTRIDETRANSFORM_H__
+#define __GSTSTRIDETRANSFORM_H__
+
+
+#include <gst/video/gstvideofilter.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_STRIDE_TRANSFORM \
+  (gst_stride_transform_get_type())
+#define GST_STRIDE_TRANSFORM(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_STRIDE_TRANSFORM,GstStrideTransform))
+#define GST_STRIDE_TRANSFORM_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_STRIDE_TRANSFORM,GstStrideTransformClass))
+#define GST_IS_STRIDE_TRANSFORM(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_STRIDE_TRANSFORM))
+#define GST_IS_STRIDE_TRANSFORM_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_STRIDE_TRANSFORM))
+
+typedef struct _GstStrideTransform GstStrideTransform;
+typedef struct _GstStrideTransformClass GstStrideTransformClass;
+
+/**
+ * GstStrideTransform:
+ *
+ * Opaque datastructure.
+ */
+struct _GstStrideTransform {
+  GstVideoFilter videofilter;
+
+};
+
+struct _GstStrideTransformClass {
+  GstVideoFilterClass parent_class;
+};
+
+GType gst_stride_transform_get_type (void);
+
+G_END_DECLS
+
+
+#endif /* __GSTSTRIDETRANSFORM_H__ */
diff --git a/gst/stride/plugin.c b/gst/stride/plugin.c
new file mode 100644
index 0000000..7672bdc
--- /dev/null
+++ b/gst/stride/plugin.c
@@ -0,0 +1,45 @@
+/* GStreamer
+ *
+ * Copyright (C) 2009 Texas Instruments, Inc - http://www.ti.com/
+ *
+ * Description: V4L2 sink element
+ *  Created on: Jul 30, 2009
+ *      Author: Rob Clark <rob@ti.com>
+ *
+ * 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 "gststridetransform.h"
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+  if (!gst_element_register (plugin, "stridetransform",
+          GST_RANK_PRIMARY, gst_stride_transform_get_type ()))
+    return FALSE;
+
+  return TRUE;
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+    GST_VERSION_MINOR,
+    "stridetransform",
+    "Convert video from strided to non-strided, or between different row-strides",
+    plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
-- 
1.7.1