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authorKibum Kim <kb0929.kim@samsung.com>2012-01-07 00:46:56 +0900
committerKibum Kim <kb0929.kim@samsung.com>2012-01-07 00:46:56 +0900
commit4fcf0a9192ac1dee34309a66be632530b66f6822 (patch)
treee09f9233b63b22f97084798dcf6ffd3c85cc3adb /gst/videocrop
parentdfa84b358c7cdf0535eba1fead62fc4122cc56e6 (diff)
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Git init
Diffstat (limited to 'gst/videocrop')
-rw-r--r--gst/videocrop/Makefile.am28
-rw-r--r--gst/videocrop/Makefile.in833
-rw-r--r--gst/videocrop/gstaspectratiocrop.c453
-rw-r--r--gst/videocrop/gstaspectratiocrop.h67
-rw-r--r--gst/videocrop/gstvideocrop.c761
-rw-r--r--gst/videocrop/gstvideocrop.h92
6 files changed, 2234 insertions, 0 deletions
diff --git a/gst/videocrop/Makefile.am b/gst/videocrop/Makefile.am
new file mode 100644
index 0000000..2b9838b
--- /dev/null
+++ b/gst/videocrop/Makefile.am
@@ -0,0 +1,28 @@
+plugin_LTLIBRARIES = libgstvideocrop.la
+
+# Note: we only use defines from gst/video/video.h, but none
+# of the functions, so we don't need to link to libgstvideo
+
+libgstvideocrop_la_SOURCES = gstvideocrop.c gstaspectratiocrop.c
+libgstvideocrop_la_CFLAGS = $(GST_CFLAGS) $(GST_BASE_CFLAGS) \
+ $(GST_PLUGINS_BASE_CFLAGS)
+libgstvideocrop_la_LIBADD = $(GST_BASE_LIBS)
+libgstvideocrop_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
+libgstvideocrop_la_LIBTOOLFLAGS = --tag=disable-static
+
+noinst_HEADERS = gstvideocrop.h gstaspectratiocrop.h
+
+Android.mk: Makefile.am $(BUILT_SOURCES)
+ androgenizer \
+ -:PROJECT libgstvideocrop -:SHARED libgstvideocrop \
+ -:TAGS eng debug \
+ -:REL_TOP $(top_srcdir) -:ABS_TOP $(abs_top_srcdir) \
+ -:SOURCES $(libgstvideocrop_la_SOURCES) \
+ $(nodist_libgstvideocrop_la_SOURCES) \
+ -:CFLAGS $(DEFS) $(DEFAULT_INCLUDES) $(libgstvideocrop_la_CFLAGS) \
+ -:LDFLAGS $(libgstvideocrop_la_LDFLAGS) \
+ $(libgstvideocrop_la_LIBADD) \
+ -ldl \
+ -:PASSTHROUGH LOCAL_ARM_MODE:=arm \
+ LOCAL_MODULE_PATH:='$$(TARGET_OUT)/lib/gstreamer-0.10' \
+ > $@
diff --git a/gst/videocrop/Makefile.in b/gst/videocrop/Makefile.in
new file mode 100644
index 0000000..2464329
--- /dev/null
+++ b/gst/videocrop/Makefile.in
@@ -0,0 +1,833 @@
+# Makefile.in generated by automake 1.11.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+# 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation,
+# Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+
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diff --git a/gst/videocrop/gstaspectratiocrop.c b/gst/videocrop/gstaspectratiocrop.c
new file mode 100644
index 0000000..d932b22
--- /dev/null
+++ b/gst/videocrop/gstaspectratiocrop.c
@@ -0,0 +1,453 @@
+/* GStreamer video frame cropping to aspect-ratio
+ * Copyright (C) 2009 Thijs Vermeir <thijsvermeir@gmail.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-aspectratiocrop
+ * @see_also: #GstVideoCrop
+ *
+ * This element crops video frames to a specified #GstAspectRatioCrop:aspect-ratio.
+ *
+ * If the aspect-ratio is already correct, the element will operate
+ * in pass-through mode.
+ *
+ * <refsect2>
+ * <title>Example launch line</title>
+ * |[
+ * gst-launch -v videotestsrc ! video/x-raw-rgb,height=640,width=480 ! aspectratiocrop aspect-ratio=16/9 ! ximagesink
+ * ]| This pipeline generates a videostream in 4/3 and crops it to 16/9.
+ * </refsect2>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/gst.h>
+#include <gst/video/video.h>
+
+#include "gstaspectratiocrop.h"
+
+GST_DEBUG_CATEGORY_STATIC (aspect_ratio_crop_debug);
+#define GST_CAT_DEFAULT aspect_ratio_crop_debug
+
+enum
+{
+ ARG_0,
+ ARG_ASPECT_RATIO_CROP,
+};
+
+/* we support the same caps as videocrop */
+#define ASPECT_RATIO_CROP_CAPS \
+ GST_VIDEO_CAPS_RGBx ";" \
+ GST_VIDEO_CAPS_xRGB ";" \
+ GST_VIDEO_CAPS_BGRx ";" \
+ GST_VIDEO_CAPS_xBGR ";" \
+ GST_VIDEO_CAPS_RGBA ";" \
+ GST_VIDEO_CAPS_ARGB ";" \
+ GST_VIDEO_CAPS_BGRA ";" \
+ GST_VIDEO_CAPS_ABGR ";" \
+ GST_VIDEO_CAPS_RGB ";" \
+ GST_VIDEO_CAPS_BGR ";" \
+ GST_VIDEO_CAPS_YUV ("AYUV") ";" \
+ GST_VIDEO_CAPS_YUV ("YUY2") ";" \
+ GST_VIDEO_CAPS_YUV ("YVYU") ";" \
+ GST_VIDEO_CAPS_YUV ("UYVY") ";" \
+ GST_VIDEO_CAPS_YUV ("Y800") ";" \
+ GST_VIDEO_CAPS_YUV ("I420") ";" \
+ GST_VIDEO_CAPS_YUV ("YV12") ";" \
+ GST_VIDEO_CAPS_RGB_16 ";" \
+ GST_VIDEO_CAPS_RGB_15
+
+static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS (ASPECT_RATIO_CROP_CAPS)
+ );
+
+static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS (ASPECT_RATIO_CROP_CAPS)
+ );
+
+GST_BOILERPLATE (GstAspectRatioCrop, gst_aspect_ratio_crop, GstBin,
+ GST_TYPE_BIN);
+
+static void gst_aspect_ratio_crop_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec);
+static void gst_aspect_ratio_crop_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec);
+static void gst_aspect_ratio_crop_set_cropping (GstAspectRatioCrop *
+ aspect_ratio_crop, gint top, gint right, gint bottom, gint left);
+static GstCaps *gst_aspect_ratio_crop_get_caps (GstPad * pad);
+static gboolean gst_aspect_ratio_crop_set_caps (GstPad * pad, GstCaps * caps);
+static void gst_aspect_ratio_crop_finalize (GObject * object);
+static void gst_aspect_ratio_transform_structure (GstAspectRatioCrop *
+ aspect_ratio_crop, GstStructure * structure, GstStructure ** new_structure,
+ gboolean set_videocrop);
+
+static void
+gst_aspect_ratio_crop_set_cropping (GstAspectRatioCrop * aspect_ratio_crop,
+ gint top, gint right, gint bottom, gint left)
+{
+ GValue value = { 0 };
+ if (G_UNLIKELY (!aspect_ratio_crop->videocrop)) {
+ GST_WARNING_OBJECT (aspect_ratio_crop,
+ "Can't set the settings if there is no cropping element");
+ return;
+ }
+
+ g_value_init (&value, G_TYPE_INT);
+ g_value_set_int (&value, top);
+ GST_DEBUG_OBJECT (aspect_ratio_crop, "set top cropping to: %d", top);
+ g_object_set_property (G_OBJECT (aspect_ratio_crop->videocrop), "top",
+ &value);
+ g_value_set_int (&value, right);
+ GST_DEBUG_OBJECT (aspect_ratio_crop, "set right cropping to: %d", right);
+ g_object_set_property (G_OBJECT (aspect_ratio_crop->videocrop), "right",
+ &value);
+ g_value_set_int (&value, bottom);
+ GST_DEBUG_OBJECT (aspect_ratio_crop, "set bottom cropping to: %d", bottom);
+ g_object_set_property (G_OBJECT (aspect_ratio_crop->videocrop), "bottom",
+ &value);
+ g_value_set_int (&value, left);
+ GST_DEBUG_OBJECT (aspect_ratio_crop, "set left cropping to: %d", left);
+ g_object_set_property (G_OBJECT (aspect_ratio_crop->videocrop), "left",
+ &value);
+
+ g_value_unset (&value);
+}
+
+static gboolean
+gst_aspect_ratio_crop_set_caps (GstPad * pad, GstCaps * caps)
+{
+ GstAspectRatioCrop *aspect_ratio_crop;
+ GstPad *peer_pad;
+ GstStructure *structure;
+ gboolean ret;
+
+ aspect_ratio_crop = GST_ASPECT_RATIO_CROP (gst_pad_get_parent (pad));
+
+ g_mutex_lock (aspect_ratio_crop->crop_lock);
+
+ structure = gst_caps_get_structure (caps, 0);
+ gst_aspect_ratio_transform_structure (aspect_ratio_crop, structure, NULL,
+ TRUE);
+ peer_pad =
+ gst_element_get_static_pad (GST_ELEMENT (aspect_ratio_crop->videocrop),
+ "sink");
+ ret = gst_pad_set_caps (peer_pad, caps);
+ gst_object_unref (peer_pad);
+ gst_object_unref (aspect_ratio_crop);
+ g_mutex_unlock (aspect_ratio_crop->crop_lock);
+ return ret;
+}
+
+static void
+gst_aspect_ratio_crop_base_init (gpointer g_class)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+
+ gst_element_class_set_details_simple (element_class, "aspectratiocrop",
+ "Filter/Effect/Video",
+ "Crops video into a user-defined aspect-ratio",
+ "Thijs Vermeir <thijsvermeir@gmail.com>");
+
+ 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_aspect_ratio_crop_class_init (GstAspectRatioCropClass * klass)
+{
+ GObjectClass *gobject_class;
+
+ gobject_class = (GObjectClass *) klass;
+
+ gobject_class->set_property = gst_aspect_ratio_crop_set_property;
+ gobject_class->get_property = gst_aspect_ratio_crop_get_property;
+ gobject_class->finalize = gst_aspect_ratio_crop_finalize;
+
+ g_object_class_install_property (gobject_class, ARG_ASPECT_RATIO_CROP,
+ gst_param_spec_fraction ("aspect-ratio", "aspect-ratio",
+ "Target aspect-ratio of video", 0, 1, G_MAXINT, 1, 0, 1,
+ G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+}
+
+static void
+gst_aspect_ratio_crop_finalize (GObject * object)
+{
+ GstAspectRatioCrop *aspect_ratio_crop;
+
+ aspect_ratio_crop = GST_ASPECT_RATIO_CROP (object);
+
+ if (aspect_ratio_crop->crop_lock)
+ g_mutex_free (aspect_ratio_crop->crop_lock);
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+gst_aspect_ratio_crop_init (GstAspectRatioCrop * aspect_ratio_crop,
+ GstAspectRatioCropClass * klass)
+{
+ GstPad *link_pad;
+ GstPad *src_pad;
+
+ GST_DEBUG_CATEGORY_INIT (aspect_ratio_crop_debug, "aspectratiocrop", 0,
+ "aspectratiocrop");
+
+ aspect_ratio_crop->ar_num = 0;
+ aspect_ratio_crop->ar_denom = 1;
+
+ aspect_ratio_crop->crop_lock = g_mutex_new ();
+
+ /* add the transform element */
+ aspect_ratio_crop->videocrop = gst_element_factory_make ("videocrop", NULL);
+ gst_bin_add (GST_BIN (aspect_ratio_crop), aspect_ratio_crop->videocrop);
+
+ /* create ghost pad src */
+ link_pad =
+ gst_element_get_static_pad (GST_ELEMENT (aspect_ratio_crop->videocrop),
+ "src");
+ src_pad = gst_ghost_pad_new ("src", link_pad);
+ gst_pad_set_getcaps_function (src_pad,
+ GST_DEBUG_FUNCPTR (gst_aspect_ratio_crop_get_caps));
+ gst_element_add_pad (GST_ELEMENT (aspect_ratio_crop), src_pad);
+ gst_object_unref (link_pad);
+ /* create ghost pad sink */
+ link_pad =
+ gst_element_get_static_pad (GST_ELEMENT (aspect_ratio_crop->videocrop),
+ "sink");
+ aspect_ratio_crop->sink = gst_ghost_pad_new ("sink", link_pad);
+ gst_element_add_pad (GST_ELEMENT (aspect_ratio_crop),
+ aspect_ratio_crop->sink);
+ gst_object_unref (link_pad);
+ gst_pad_set_setcaps_function (aspect_ratio_crop->sink,
+ GST_DEBUG_FUNCPTR (gst_aspect_ratio_crop_set_caps));
+}
+
+static void
+gst_aspect_ratio_transform_structure (GstAspectRatioCrop * aspect_ratio_crop,
+ GstStructure * structure, GstStructure ** new_structure,
+ gboolean set_videocrop)
+{
+ gdouble incoming_ar;
+ gdouble requested_ar;
+ gint width, height;
+ gint cropvalue;
+ gint par_d, par_n;
+
+ /* Check if we need to change the aspect ratio */
+ if (aspect_ratio_crop->ar_num < 1) {
+ GST_DEBUG_OBJECT (aspect_ratio_crop, "No cropping requested");
+ goto beach;
+ }
+
+ /* get the information from the caps */
+ if (!gst_structure_get_int (structure, "width", &width) ||
+ !gst_structure_get_int (structure, "height", &height))
+ goto beach;
+
+ if (!gst_structure_get_fraction (structure, "pixel-aspect-ratio",
+ &par_n, &par_d)) {
+ par_d = par_n = 1;
+ }
+
+ incoming_ar = ((gdouble) (width * par_n)) / (height * par_d);
+ GST_LOG_OBJECT (aspect_ratio_crop,
+ "incoming caps width(%d), height(%d), par (%d/%d) : ar = %f", width,
+ height, par_n, par_d, incoming_ar);
+
+ requested_ar =
+ (gdouble) aspect_ratio_crop->ar_num / aspect_ratio_crop->ar_denom;
+
+ /* check if the original aspect-ratio is the aspect-ratio that we want */
+ if (requested_ar == incoming_ar) {
+ GST_DEBUG_OBJECT (aspect_ratio_crop,
+ "Input video already has the correct aspect ratio (%.3f == %.3f)",
+ incoming_ar, requested_ar);
+ goto beach;
+ } else if (requested_ar > incoming_ar) {
+ /* fix aspect ratio with cropping on top and bottom */
+ cropvalue =
+ ((((double) aspect_ratio_crop->ar_denom /
+ (double) (aspect_ratio_crop->ar_num)) * ((double) par_n /
+ (double) par_d) * width) - height) / 2;
+ if (cropvalue < 0) {
+ cropvalue *= -1;
+ }
+ if (cropvalue >= (height / 2))
+ goto crop_failed;
+ if (set_videocrop) {
+ gst_aspect_ratio_crop_set_cropping (aspect_ratio_crop, cropvalue, 0,
+ cropvalue, 0);
+ }
+ if (new_structure) {
+ *new_structure = gst_structure_copy (structure);
+ gst_structure_set (*new_structure,
+ "height", G_TYPE_INT, (int) (height - (cropvalue * 2)), NULL);
+ }
+ } else {
+ /* fix aspect ratio with cropping on left and right */
+ cropvalue =
+ ((((double) aspect_ratio_crop->ar_num /
+ (double) (aspect_ratio_crop->ar_denom)) * ((double) par_d /
+ (double) par_n) * height) - width) / 2;
+ if (cropvalue < 0) {
+ cropvalue *= -1;
+ }
+ if (cropvalue >= (width / 2))
+ goto crop_failed;
+ if (set_videocrop) {
+ gst_aspect_ratio_crop_set_cropping (aspect_ratio_crop, 0, cropvalue,
+ 0, cropvalue);
+ }
+ if (new_structure) {
+ *new_structure = gst_structure_copy (structure);
+ gst_structure_set (*new_structure,
+ "width", G_TYPE_INT, (int) (width - (cropvalue * 2)), NULL);
+ }
+ }
+
+ return;
+
+crop_failed:
+ GST_WARNING_OBJECT (aspect_ratio_crop,
+ "can't crop to aspect ratio requested");
+ goto beach;
+beach:
+ if (set_videocrop) {
+ gst_aspect_ratio_crop_set_cropping (aspect_ratio_crop, 0, 0, 0, 0);
+ }
+
+ if (new_structure) {
+ *new_structure = gst_structure_copy (structure);
+ }
+}
+
+static GstCaps *
+gst_aspect_ratio_crop_transform_caps (GstAspectRatioCrop * aspect_ratio_crop,
+ GstCaps * caps)
+{
+ GstCaps *transform;
+ gint size, i;
+
+ transform = gst_caps_new_empty ();
+
+ size = gst_caps_get_size (caps);
+
+ for (i = 0; i < size; i++) {
+ GstStructure *s;
+ GstStructure *trans_s;
+
+ s = gst_caps_get_structure (caps, i);
+
+ gst_aspect_ratio_transform_structure (aspect_ratio_crop, s, &trans_s,
+ FALSE);
+ gst_caps_append_structure (transform, trans_s);
+ }
+
+ return transform;
+}
+
+static GstCaps *
+gst_aspect_ratio_crop_get_caps (GstPad * pad)
+{
+ GstPad *peer;
+ GstAspectRatioCrop *aspect_ratio_crop;
+ GstCaps *return_caps;
+
+ aspect_ratio_crop = GST_ASPECT_RATIO_CROP (gst_pad_get_parent (pad));
+
+ g_mutex_lock (aspect_ratio_crop->crop_lock);
+
+ peer = gst_pad_get_peer (aspect_ratio_crop->sink);
+ if (peer == NULL) {
+ return_caps = gst_static_pad_template_get_caps (&src_template);
+ gst_caps_ref (return_caps);
+ } else {
+ GstCaps *peer_caps;
+
+ peer_caps = gst_pad_get_caps (peer);
+ return_caps =
+ gst_aspect_ratio_crop_transform_caps (aspect_ratio_crop, peer_caps);
+ gst_caps_unref (peer_caps);
+ gst_object_unref (peer);
+ }
+
+ g_mutex_unlock (aspect_ratio_crop->crop_lock);
+ gst_object_unref (aspect_ratio_crop);
+
+ return return_caps;
+}
+
+static void
+gst_aspect_ratio_crop_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ GstAspectRatioCrop *aspect_ratio_crop;
+ gboolean recheck = FALSE;
+
+ aspect_ratio_crop = GST_ASPECT_RATIO_CROP (object);
+
+ GST_OBJECT_LOCK (aspect_ratio_crop);
+ switch (prop_id) {
+ case ARG_ASPECT_RATIO_CROP:
+ if (GST_VALUE_HOLDS_FRACTION (value)) {
+ aspect_ratio_crop->ar_num = gst_value_get_fraction_numerator (value);
+ aspect_ratio_crop->ar_denom =
+ gst_value_get_fraction_denominator (value);
+ recheck = (GST_PAD_CAPS (aspect_ratio_crop->sink) != NULL);
+ }
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+ GST_OBJECT_UNLOCK (aspect_ratio_crop);
+
+ if (recheck) {
+ gst_aspect_ratio_crop_set_caps (aspect_ratio_crop->sink,
+ GST_PAD_CAPS (aspect_ratio_crop->sink));
+ }
+}
+
+static void
+gst_aspect_ratio_crop_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec)
+{
+ GstAspectRatioCrop *aspect_ratio_crop;
+
+ aspect_ratio_crop = GST_ASPECT_RATIO_CROP (object);
+
+ GST_OBJECT_LOCK (aspect_ratio_crop);
+ switch (prop_id) {
+ case ARG_ASPECT_RATIO_CROP:
+ gst_value_set_fraction (value, aspect_ratio_crop->ar_num,
+ aspect_ratio_crop->ar_denom);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+ GST_OBJECT_UNLOCK (aspect_ratio_crop);
+}
diff --git a/gst/videocrop/gstaspectratiocrop.h b/gst/videocrop/gstaspectratiocrop.h
new file mode 100644
index 0000000..dc2e7cd
--- /dev/null
+++ b/gst/videocrop/gstaspectratiocrop.h
@@ -0,0 +1,67 @@
+/* GStreamer video frame cropping to aspect-ratio
+ * Copyright (C) 2009 Thijs Vermeir <thijsvermeir@gmail.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 __GST_ASPECT_RATIO_CROP_H__
+#define __GST_ASPECT_RATIO_CROP_H__
+
+#include <gst/gstbin.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_ASPECT_RATIO_CROP \
+ (gst_aspect_ratio_crop_get_type())
+#define GST_ASPECT_RATIO_CROP(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ASPECT_RATIO_CROP,GstAspectRatioCrop))
+#define GST_ASPECT_RATIO_CROP_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ASPECT_RATIO_CROP,GstAspectRatioCropClass))
+#define GST_IS_ASPECT_RATIO_CROP(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ASPECT_RATIO_CROP))
+#define GST_IS_ASPECT_RATIO_CROP_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ASPECT_RATIO_CROP))
+
+typedef struct _GstAspectRatioCrop GstAspectRatioCrop;
+typedef struct _GstAspectRatioCropClass GstAspectRatioCropClass;
+
+struct _GstAspectRatioCrop
+{
+ GstBin parent;
+
+ /* our videocrop element */
+ GstElement *videocrop;
+
+ GstPad *sink;
+
+ /* target aspect ratio */
+ gint ar_num; /* if < 1 then don't change ar */
+ gint ar_denom;
+
+ GMutex *crop_lock;
+};
+
+struct _GstAspectRatioCropClass
+{
+ GstBinClass parent_class;
+};
+
+GType gst_aspect_ratio_crop_get_type (void);
+
+G_END_DECLS
+
+#endif /* __GST_ASPECT_RATIO_CROP_H__ */
+
diff --git a/gst/videocrop/gstvideocrop.c b/gst/videocrop/gstvideocrop.c
new file mode 100644
index 0000000..7100bee
--- /dev/null
+++ b/gst/videocrop/gstvideocrop.c
@@ -0,0 +1,761 @@
+/* GStreamer video frame cropping
+ * Copyright (C) 2006 Tim-Philipp Müller <tim centricular net>
+ *
+ * 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-videocrop
+ * @see_also: #GstVideoBox
+ *
+ * This element crops video frames, meaning it can remove parts of the
+ * picture on the left, right, top or bottom of the picture and output
+ * a smaller picture than the input picture, with the unwanted parts at the
+ * border removed.
+ *
+ * The videocrop element is similar to the videobox element, but its main
+ * goal is to support a multitude of formats as efficiently as possible.
+ * Unlike videbox, it cannot add borders to the picture and unlike videbox
+ * it will always output images in exactly the same format as the input image.
+ *
+ * If there is nothing to crop, the element will operate in pass-through mode.
+ *
+ * Note that no special efforts are made to handle chroma-subsampled formats
+ * in the case of odd-valued cropping and compensate for sub-unit chroma plane
+ * shifts for such formats in the case where the #GstVideoCrop:left or
+ * #GstVideoCrop:top property is set to an odd number. This doesn't matter for
+ * most use cases, but it might matter for yours.
+ *
+ * <refsect2>
+ * <title>Example launch line</title>
+ * |[
+ * gst-launch -v videotestsrc ! videocrop top=42 left=1 right=4 bottom=0 ! ximagesink
+ * ]|
+ * </refsect2>
+ */
+
+/* TODO:
+ * - for packed formats, we could avoid memcpy() in case crop_left
+ * and crop_right are 0 and just create a sub-buffer of the input
+ * buffer
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/gst.h>
+#include <gst/video/video.h>
+
+#include "gstvideocrop.h"
+#include "gstaspectratiocrop.h"
+
+#include <string.h>
+
+GST_DEBUG_CATEGORY_STATIC (videocrop_debug);
+#define GST_CAT_DEFAULT videocrop_debug
+
+enum
+{
+ ARG_0,
+ ARG_LEFT,
+ ARG_RIGHT,
+ ARG_TOP,
+ ARG_BOTTOM
+};
+
+/* the formats we support */
+#define GST_VIDEO_CAPS_GRAY "video/x-raw-gray, " \
+ "bpp = (int) 8, " \
+ "width = " GST_VIDEO_SIZE_RANGE ", " \
+ "height = " GST_VIDEO_SIZE_RANGE ", " \
+ "framerate = " GST_VIDEO_FPS_RANGE
+
+#define VIDEO_CROP_CAPS \
+ GST_VIDEO_CAPS_RGBx ";" \
+ GST_VIDEO_CAPS_xRGB ";" \
+ GST_VIDEO_CAPS_BGRx ";" \
+ GST_VIDEO_CAPS_xBGR ";" \
+ GST_VIDEO_CAPS_RGBA ";" \
+ GST_VIDEO_CAPS_ARGB ";" \
+ GST_VIDEO_CAPS_BGRA ";" \
+ GST_VIDEO_CAPS_ABGR ";" \
+ GST_VIDEO_CAPS_RGB ";" \
+ GST_VIDEO_CAPS_BGR ";" \
+ GST_VIDEO_CAPS_YUV ("AYUV") ";" \
+ GST_VIDEO_CAPS_YUV ("YUY2") ";" \
+ GST_VIDEO_CAPS_YUV ("YVYU") ";" \
+ GST_VIDEO_CAPS_YUV ("UYVY") ";" \
+ GST_VIDEO_CAPS_YUV ("Y800") ";" \
+ GST_VIDEO_CAPS_YUV ("I420") ";" \
+ GST_VIDEO_CAPS_YUV ("YV12") ";" \
+ GST_VIDEO_CAPS_RGB_16 ";" \
+ GST_VIDEO_CAPS_RGB_15 ";" \
+ GST_VIDEO_CAPS_GRAY
+
+static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS (VIDEO_CROP_CAPS)
+ );
+
+static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS (VIDEO_CROP_CAPS)
+ );
+
+GST_BOILERPLATE (GstVideoCrop, gst_video_crop, GstBaseTransform,
+ GST_TYPE_BASE_TRANSFORM);
+
+static void gst_video_crop_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec);
+static void gst_video_crop_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec);
+
+static GstCaps *gst_video_crop_transform_caps (GstBaseTransform * trans,
+ GstPadDirection direction, GstCaps * caps);
+static GstFlowReturn gst_video_crop_transform (GstBaseTransform * trans,
+ GstBuffer * inbuf, GstBuffer * outbuf);
+static gboolean gst_video_crop_get_unit_size (GstBaseTransform * trans,
+ GstCaps * caps, guint * size);
+static gboolean gst_video_crop_set_caps (GstBaseTransform * trans,
+ GstCaps * in_caps, GstCaps * outcaps);
+static gboolean gst_video_crop_src_event (GstBaseTransform * trans,
+ GstEvent * event);
+
+static void
+gst_video_crop_base_init (gpointer g_class)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+
+ gst_element_class_set_details_simple (element_class, "Crop",
+ "Filter/Effect/Video",
+ "Crops video into a user-defined region",
+ "Tim-Philipp Müller <tim centricular net>");
+
+ 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 gboolean
+gst_video_crop_src_event (GstBaseTransform * trans, GstEvent * event)
+{
+ GstEvent *new_event;
+ GstStructure *new_structure;
+ const GstStructure *structure;
+ const gchar *event_name;
+ double pointer_x;
+ double pointer_y;
+
+ GstVideoCrop *vcrop = GST_VIDEO_CROP (trans);
+ new_event = NULL;
+
+ GST_OBJECT_LOCK (vcrop);
+ if (GST_EVENT_TYPE (event) == GST_EVENT_NAVIGATION &&
+ (vcrop->crop_left != 0 || vcrop->crop_top != 0)) {
+ structure = gst_event_get_structure (event);
+ event_name = gst_structure_get_string (structure, "event");
+
+ if (event_name &&
+ (strcmp (event_name, "mouse-move") == 0 ||
+ strcmp (event_name, "mouse-button-press") == 0 ||
+ strcmp (event_name, "mouse-button-release") == 0)) {
+
+ if (gst_structure_get_double (structure, "pointer_x", &pointer_x) &&
+ gst_structure_get_double (structure, "pointer_y", &pointer_y)) {
+
+ new_structure = gst_structure_copy (structure);
+ gst_structure_set (new_structure,
+ "pointer_x", G_TYPE_DOUBLE, (double) (pointer_x + vcrop->crop_left),
+ "pointer_y", G_TYPE_DOUBLE, (double) (pointer_y + vcrop->crop_top),
+ NULL);
+
+ new_event = gst_event_new_navigation (new_structure);
+ gst_event_unref (event);
+ } else {
+ GST_WARNING_OBJECT (vcrop, "Failed to read navigation event");
+ }
+ }
+ }
+
+ GST_OBJECT_UNLOCK (vcrop);
+ return GST_BASE_TRANSFORM_CLASS (parent_class)->src_event (trans,
+ (new_event ? new_event : event));
+}
+
+static void
+gst_video_crop_class_init (GstVideoCropClass * klass)
+{
+ GObjectClass *gobject_class;
+ GstBaseTransformClass *basetransform_class;
+
+ gobject_class = (GObjectClass *) klass;
+ basetransform_class = (GstBaseTransformClass *) klass;
+
+ gobject_class->set_property = gst_video_crop_set_property;
+ gobject_class->get_property = gst_video_crop_get_property;
+
+ g_object_class_install_property (gobject_class, ARG_LEFT,
+ g_param_spec_int ("left", "Left", "Pixels to crop at left",
+ 0, G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+ g_object_class_install_property (gobject_class, ARG_RIGHT,
+ g_param_spec_int ("right", "Right", "Pixels to crop at right",
+ 0, G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+ g_object_class_install_property (gobject_class, ARG_TOP,
+ g_param_spec_int ("top", "Top", "Pixels to crop at top",
+ 0, G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+ g_object_class_install_property (gobject_class, ARG_BOTTOM,
+ g_param_spec_int ("bottom", "Bottom", "Pixels to crop at bottom",
+ 0, G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+ basetransform_class->transform = GST_DEBUG_FUNCPTR (gst_video_crop_transform);
+ basetransform_class->transform_caps =
+ GST_DEBUG_FUNCPTR (gst_video_crop_transform_caps);
+ basetransform_class->set_caps = GST_DEBUG_FUNCPTR (gst_video_crop_set_caps);
+ basetransform_class->get_unit_size =
+ GST_DEBUG_FUNCPTR (gst_video_crop_get_unit_size);
+
+ basetransform_class->passthrough_on_same_caps = FALSE;
+ basetransform_class->src_event = GST_DEBUG_FUNCPTR (gst_video_crop_src_event);
+}
+
+static void
+gst_video_crop_init (GstVideoCrop * vcrop, GstVideoCropClass * klass)
+{
+ vcrop->crop_right = 0;
+ vcrop->crop_left = 0;
+ vcrop->crop_top = 0;
+ vcrop->crop_bottom = 0;
+}
+
+static gboolean
+gst_video_crop_get_image_details_from_caps (GstVideoCrop * vcrop,
+ GstVideoCropImageDetails * details, GstCaps * caps)
+{
+ GstStructure *structure;
+ gint width, height;
+
+ structure = gst_caps_get_structure (caps, 0);
+ if (!gst_structure_get_int (structure, "width", &width) ||
+ !gst_structure_get_int (structure, "height", &height)) {
+ goto incomplete_format;
+ }
+
+ details->width = width;
+ details->height = height;
+
+ if (gst_structure_has_name (structure, "video/x-raw-rgb") ||
+ gst_structure_has_name (structure, "video/x-raw-gray")) {
+ gint bpp = 0;
+
+ if (!gst_structure_get_int (structure, "bpp", &bpp) || (bpp & 0x07) != 0)
+ goto incomplete_format;
+
+ details->packing = VIDEO_CROP_PIXEL_FORMAT_PACKED_SIMPLE;
+ details->bytes_per_pixel = bpp / 8;
+ details->stride = GST_ROUND_UP_4 (width * details->bytes_per_pixel);
+ details->size = details->stride * height;
+ } else if (gst_structure_has_name (structure, "video/x-raw-yuv")) {
+ guint32 format = 0;
+
+ if (!gst_structure_get_fourcc (structure, "format", &format))
+ goto incomplete_format;
+
+ switch (format) {
+ case GST_MAKE_FOURCC ('A', 'Y', 'U', 'V'):
+ details->packing = VIDEO_CROP_PIXEL_FORMAT_PACKED_SIMPLE;
+ details->bytes_per_pixel = 4;
+ details->stride = GST_ROUND_UP_4 (width * 4);
+ details->size = details->stride * height;
+ break;
+ case GST_MAKE_FOURCC ('Y', 'V', 'Y', 'U'):
+ case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'):
+ case GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'):
+ details->packing = VIDEO_CROP_PIXEL_FORMAT_PACKED_COMPLEX;
+ details->bytes_per_pixel = 2;
+ details->stride = GST_ROUND_UP_4 (width * 2);
+ details->size = details->stride * height;
+ if (format == GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y')) {
+ /* UYVY = 4:2:2 - [U0 Y0 V0 Y1] [U2 Y2 V2 Y3] [U4 Y4 V4 Y5] */
+ details->macro_y_off = 1;
+ } else {
+ /* YUYV = 4:2:2 - [Y0 U0 Y1 V0] [Y2 U2 Y3 V2] [Y4 U4 Y5 V4] = YUY2 */
+ details->macro_y_off = 0;
+ }
+ break;
+ case GST_MAKE_FOURCC ('Y', '8', '0', '0'):
+ details->packing = VIDEO_CROP_PIXEL_FORMAT_PACKED_SIMPLE;
+ details->bytes_per_pixel = 1;
+ details->stride = GST_ROUND_UP_4 (width);
+ details->size = details->stride * height;
+ break;
+ case GST_MAKE_FOURCC ('I', '4', '2', '0'):
+ case GST_MAKE_FOURCC ('Y', 'V', '1', '2'):{
+ details->packing = VIDEO_CROP_PIXEL_FORMAT_PLANAR;
+
+ details->y_stride = GST_ROUND_UP_4 (width);
+ details->u_stride = GST_ROUND_UP_8 (width) / 2;
+ details->v_stride = GST_ROUND_UP_8 (width) / 2;
+
+ /* I420 and YV12 have U/V planes swapped, but doesn't matter for us */
+ details->y_off = 0;
+ details->u_off = 0 + details->y_stride * GST_ROUND_UP_2 (height);
+ details->v_off = details->u_off +
+ details->u_stride * (GST_ROUND_UP_2 (height) / 2);
+ details->size = details->v_off +
+ details->v_stride * (GST_ROUND_UP_2 (height) / 2);
+ break;
+ }
+ default:
+ goto unknown_format;
+ }
+ } else {
+ goto unknown_format;
+ }
+
+ return TRUE;
+
+ /* ERRORS */
+unknown_format:
+ {
+ GST_ELEMENT_ERROR (vcrop, STREAM, NOT_IMPLEMENTED, (NULL),
+ ("Unsupported format"));
+ return FALSE;
+ }
+
+incomplete_format:
+ {
+ GST_ELEMENT_ERROR (vcrop, CORE, NEGOTIATION, (NULL),
+ ("Incomplete caps, some required field is missing"));
+ return FALSE;
+ }
+}
+
+static gboolean
+gst_video_crop_get_unit_size (GstBaseTransform * trans, GstCaps * caps,
+ guint * size)
+{
+ GstVideoCropImageDetails img_details = { 0, };
+ GstVideoCrop *vcrop = GST_VIDEO_CROP (trans);
+
+ if (!gst_video_crop_get_image_details_from_caps (vcrop, &img_details, caps))
+ return FALSE;
+
+ *size = img_details.size;
+ return TRUE;
+}
+
+#define ROUND_DOWN_2(n) ((n)&(~1))
+
+static void
+gst_video_crop_transform_packed_complex (GstVideoCrop * vcrop,
+ GstBuffer * inbuf, GstBuffer * outbuf)
+{
+ guint8 *in_data, *out_data;
+ guint i, dx;
+
+ in_data = GST_BUFFER_DATA (inbuf);
+ out_data = GST_BUFFER_DATA (outbuf);
+
+ in_data += vcrop->crop_top * vcrop->in.stride;
+
+ /* rounding down here so we end up at the start of a macro-pixel and not
+ * in the middle of one */
+ in_data += ROUND_DOWN_2 (vcrop->crop_left) * vcrop->in.bytes_per_pixel;
+
+ dx = vcrop->out.width * vcrop->out.bytes_per_pixel;
+
+ /* UYVY = 4:2:2 - [U0 Y0 V0 Y1] [U2 Y2 V2 Y3] [U4 Y4 V4 Y5]
+ * YUYV = 4:2:2 - [Y0 U0 Y1 V0] [Y2 U2 Y3 V2] [Y4 U4 Y5 V4] = YUY2 */
+ if ((vcrop->crop_left % 2) != 0) {
+ for (i = 0; i < vcrop->out.height; ++i) {
+ gint j;
+
+ memcpy (out_data, in_data, dx);
+
+ /* move just the Y samples one pixel to the left, don't worry about
+ * chroma shift */
+ for (j = vcrop->in.macro_y_off; j < vcrop->out.stride - 2; j += 2)
+ out_data[j] = in_data[j + 2];
+
+ in_data += vcrop->in.stride;
+ out_data += vcrop->out.stride;
+ }
+ } else {
+ for (i = 0; i < vcrop->out.height; ++i) {
+ memcpy (out_data, in_data, dx);
+ in_data += vcrop->in.stride;
+ out_data += vcrop->out.stride;
+ }
+ }
+}
+
+static void
+gst_video_crop_transform_packed_simple (GstVideoCrop * vcrop,
+ GstBuffer * inbuf, GstBuffer * outbuf)
+{
+ guint8 *in_data, *out_data;
+ guint i, dx;
+
+ in_data = GST_BUFFER_DATA (inbuf);
+ out_data = GST_BUFFER_DATA (outbuf);
+
+ in_data += vcrop->crop_top * vcrop->in.stride;
+ in_data += vcrop->crop_left * vcrop->in.bytes_per_pixel;
+
+ dx = vcrop->out.width * vcrop->out.bytes_per_pixel;
+
+ for (i = 0; i < vcrop->out.height; ++i) {
+ memcpy (out_data, in_data, dx);
+ in_data += vcrop->in.stride;
+ out_data += vcrop->out.stride;
+ }
+}
+
+static void
+gst_video_crop_transform_planar (GstVideoCrop * vcrop, GstBuffer * inbuf,
+ GstBuffer * outbuf)
+{
+ guint8 *y_out, *u_out, *v_out;
+ guint8 *y_in, *u_in, *v_in;
+ guint i, dx;
+
+ /* Y plane */
+ y_in = GST_BUFFER_DATA (inbuf);
+ y_out = GST_BUFFER_DATA (outbuf);
+
+ y_in += (vcrop->crop_top * vcrop->in.y_stride) + vcrop->crop_left;
+ dx = vcrop->out.width * 1;
+
+ for (i = 0; i < vcrop->out.height; ++i) {
+ memcpy (y_out, y_in, dx);
+ y_in += vcrop->in.y_stride;
+ y_out += vcrop->out.y_stride;
+ }
+
+ /* U + V planes */
+ u_in = GST_BUFFER_DATA (inbuf) + vcrop->in.u_off;
+ u_out = GST_BUFFER_DATA (outbuf) + vcrop->out.u_off;
+
+ u_in += (vcrop->crop_top / 2) * vcrop->in.u_stride;
+ u_in += vcrop->crop_left / 2;
+
+ v_in = GST_BUFFER_DATA (inbuf) + vcrop->in.v_off;
+ v_out = GST_BUFFER_DATA (outbuf) + vcrop->out.v_off;
+
+ v_in += (vcrop->crop_top / 2) * vcrop->in.v_stride;
+ v_in += vcrop->crop_left / 2;
+
+ dx = GST_ROUND_UP_2 (vcrop->out.width) / 2;
+
+ for (i = 0; i < GST_ROUND_UP_2 (vcrop->out.height) / 2; ++i) {
+ memcpy (u_out, u_in, dx);
+ memcpy (v_out, v_in, dx);
+ u_in += vcrop->in.u_stride;
+ u_out += vcrop->out.u_stride;
+ v_in += vcrop->in.v_stride;
+ v_out += vcrop->out.v_stride;
+ }
+}
+
+static GstFlowReturn
+gst_video_crop_transform (GstBaseTransform * trans, GstBuffer * inbuf,
+ GstBuffer * outbuf)
+{
+ GstVideoCrop *vcrop = GST_VIDEO_CROP (trans);
+
+ switch (vcrop->in.packing) {
+ case VIDEO_CROP_PIXEL_FORMAT_PACKED_SIMPLE:
+ gst_video_crop_transform_packed_simple (vcrop, inbuf, outbuf);
+ break;
+ case VIDEO_CROP_PIXEL_FORMAT_PACKED_COMPLEX:
+ gst_video_crop_transform_packed_complex (vcrop, inbuf, outbuf);
+ break;
+ case VIDEO_CROP_PIXEL_FORMAT_PLANAR:
+ gst_video_crop_transform_planar (vcrop, inbuf, outbuf);
+ break;
+ default:
+ g_assert_not_reached ();
+ }
+
+ return GST_FLOW_OK;
+}
+
+static gint
+gst_video_crop_transform_dimension (gint val, gint delta)
+{
+ gint64 new_val = (gint64) val + (gint64) delta;
+
+ new_val = CLAMP (new_val, 1, G_MAXINT);
+
+ return (gint) new_val;
+}
+
+static gboolean
+gst_video_crop_transform_dimension_value (const GValue * src_val,
+ gint delta, GValue * dest_val)
+{
+ gboolean ret = TRUE;
+
+ g_value_init (dest_val, G_VALUE_TYPE (src_val));
+
+ if (G_VALUE_HOLDS_INT (src_val)) {
+ gint ival = g_value_get_int (src_val);
+
+ ival = gst_video_crop_transform_dimension (ival, delta);
+ g_value_set_int (dest_val, ival);
+ } else if (GST_VALUE_HOLDS_INT_RANGE (src_val)) {
+ gint min = gst_value_get_int_range_min (src_val);
+ gint max = gst_value_get_int_range_max (src_val);
+
+ min = gst_video_crop_transform_dimension (min, delta);
+ max = gst_video_crop_transform_dimension (max, delta);
+ gst_value_set_int_range (dest_val, min, max);
+ } else if (GST_VALUE_HOLDS_LIST (src_val)) {
+ gint i;
+
+ for (i = 0; i < gst_value_list_get_size (src_val); ++i) {
+ const GValue *list_val;
+ GValue newval = { 0, };
+
+ list_val = gst_value_list_get_value (src_val, i);
+ if (gst_video_crop_transform_dimension_value (list_val, delta, &newval))
+ gst_value_list_append_value (dest_val, &newval);
+ g_value_unset (&newval);
+ }
+
+ if (gst_value_list_get_size (dest_val) == 0) {
+ g_value_unset (dest_val);
+ ret = FALSE;
+ }
+ } else {
+ g_value_unset (dest_val);
+ ret = FALSE;
+ }
+
+ return ret;
+}
+
+static GstCaps *
+gst_video_crop_transform_caps (GstBaseTransform * trans,
+ GstPadDirection direction, GstCaps * caps)
+{
+ GstVideoCrop *vcrop;
+ GstCaps *other_caps;
+ gint dy, dx, i;
+
+ vcrop = GST_VIDEO_CROP (trans);
+
+ GST_OBJECT_LOCK (vcrop);
+
+ GST_LOG_OBJECT (vcrop, "l=%d,r=%d,b=%d,t=%d",
+ vcrop->crop_left, vcrop->crop_right, vcrop->crop_bottom, vcrop->crop_top);
+
+ if (direction == GST_PAD_SRC) {
+ dx = vcrop->crop_left + vcrop->crop_right;
+ dy = vcrop->crop_top + vcrop->crop_bottom;
+ } else {
+ dx = 0 - (vcrop->crop_left + vcrop->crop_right);
+ dy = 0 - (vcrop->crop_top + vcrop->crop_bottom);
+ }
+ GST_OBJECT_UNLOCK (vcrop);
+
+ GST_LOG_OBJECT (vcrop, "transforming caps %" GST_PTR_FORMAT, caps);
+
+ other_caps = gst_caps_new_empty ();
+
+ for (i = 0; i < gst_caps_get_size (caps); ++i) {
+ const GValue *v;
+ GstStructure *structure, *new_structure;
+ GValue w_val = { 0, }, h_val = {
+ 0,};
+
+ structure = gst_caps_get_structure (caps, i);
+
+ v = gst_structure_get_value (structure, "width");
+ if (!gst_video_crop_transform_dimension_value (v, dx, &w_val)) {
+ GST_WARNING_OBJECT (vcrop, "could not tranform width value with dx=%d"
+ ", caps structure=%" GST_PTR_FORMAT, dx, structure);
+ continue;
+ }
+
+ v = gst_structure_get_value (structure, "height");
+ if (!gst_video_crop_transform_dimension_value (v, dy, &h_val)) {
+ g_value_unset (&w_val);
+ GST_WARNING_OBJECT (vcrop, "could not tranform height value with dy=%d"
+ ", caps structure=%" GST_PTR_FORMAT, dy, structure);
+ continue;
+ }
+
+ new_structure = gst_structure_copy (structure);
+ gst_structure_set_value (new_structure, "width", &w_val);
+ gst_structure_set_value (new_structure, "height", &h_val);
+ g_value_unset (&w_val);
+ g_value_unset (&h_val);
+ GST_LOG_OBJECT (vcrop, "transformed structure %2d: %" GST_PTR_FORMAT
+ " => %" GST_PTR_FORMAT, i, structure, new_structure);
+ gst_caps_append_structure (other_caps, new_structure);
+ }
+
+ if (gst_caps_is_empty (other_caps)) {
+ gst_caps_unref (other_caps);
+ other_caps = NULL;
+ }
+
+ return other_caps;
+}
+
+static gboolean
+gst_video_crop_set_caps (GstBaseTransform * trans, GstCaps * incaps,
+ GstCaps * outcaps)
+{
+ GstVideoCrop *crop = GST_VIDEO_CROP (trans);
+
+ if (!gst_video_crop_get_image_details_from_caps (crop, &crop->in, incaps))
+ goto wrong_input;
+
+ if (!gst_video_crop_get_image_details_from_caps (crop, &crop->out, outcaps))
+ goto wrong_output;
+
+ if (G_UNLIKELY ((crop->crop_left + crop->crop_right) >= crop->in.width ||
+ (crop->crop_top + crop->crop_bottom) >= crop->in.height))
+ goto cropping_too_much;
+
+ GST_LOG_OBJECT (crop, "incaps = %" GST_PTR_FORMAT ", outcaps = %"
+ GST_PTR_FORMAT, incaps, outcaps);
+
+ if ((crop->crop_left | crop->crop_right | crop->crop_top | crop->
+ crop_bottom) == 0) {
+ GST_LOG_OBJECT (crop, "we are using passthrough");
+ gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (crop), TRUE);
+ } else {
+ GST_LOG_OBJECT (crop, "we are not using passthrough");
+ gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (crop), FALSE);
+ }
+
+ return TRUE;
+
+ /* ERROR */
+wrong_input:
+ {
+ GST_DEBUG_OBJECT (crop, "failed to parse input caps %" GST_PTR_FORMAT,
+ incaps);
+ return FALSE;
+ }
+wrong_output:
+ {
+ GST_DEBUG_OBJECT (crop, "failed to parse output caps %" GST_PTR_FORMAT,
+ outcaps);
+ return FALSE;
+ }
+cropping_too_much:
+ {
+ GST_DEBUG_OBJECT (crop, "we are cropping too much");
+ return FALSE;
+ }
+}
+
+static void
+gst_video_crop_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ GstVideoCrop *video_crop;
+
+ video_crop = GST_VIDEO_CROP (object);
+
+ /* don't modify while we are transforming */
+ GST_BASE_TRANSFORM_LOCK (GST_BASE_TRANSFORM_CAST (video_crop));
+
+ /* protect with the object lock so that we can read them */
+ GST_OBJECT_LOCK (video_crop);
+ switch (prop_id) {
+ case ARG_LEFT:
+ video_crop->crop_left = g_value_get_int (value);
+ break;
+ case ARG_RIGHT:
+ video_crop->crop_right = g_value_get_int (value);
+ break;
+ case ARG_TOP:
+ video_crop->crop_top = g_value_get_int (value);
+ break;
+ case ARG_BOTTOM:
+ video_crop->crop_bottom = g_value_get_int (value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+ GST_OBJECT_UNLOCK (video_crop);
+
+ GST_LOG_OBJECT (video_crop, "l=%d,r=%d,b=%d,t=%d",
+ video_crop->crop_left, video_crop->crop_right, video_crop->crop_bottom,
+ video_crop->crop_top);
+
+ gst_base_transform_reconfigure (GST_BASE_TRANSFORM (video_crop));
+ GST_BASE_TRANSFORM_UNLOCK (GST_BASE_TRANSFORM_CAST (video_crop));
+}
+
+static void
+gst_video_crop_get_property (GObject * object, guint prop_id, GValue * value,
+ GParamSpec * pspec)
+{
+ GstVideoCrop *video_crop;
+
+ video_crop = GST_VIDEO_CROP (object);
+
+ GST_OBJECT_LOCK (video_crop);
+ switch (prop_id) {
+ case ARG_LEFT:
+ g_value_set_int (value, video_crop->crop_left);
+ break;
+ case ARG_RIGHT:
+ g_value_set_int (value, video_crop->crop_right);
+ break;
+ case ARG_TOP:
+ g_value_set_int (value, video_crop->crop_top);
+ break;
+ case ARG_BOTTOM:
+ g_value_set_int (value, video_crop->crop_bottom);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+ GST_OBJECT_UNLOCK (video_crop);
+}
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+ GST_DEBUG_CATEGORY_INIT (videocrop_debug, "videocrop", 0, "videocrop");
+
+ if (gst_element_register (plugin, "videocrop", GST_RANK_NONE,
+ GST_TYPE_VIDEO_CROP)
+ && gst_element_register (plugin, "aspectratiocrop", GST_RANK_NONE,
+ GST_TYPE_ASPECT_RATIO_CROP))
+ return TRUE;
+
+ return FALSE;
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "videocrop",
+ "Crops video into a user-defined region",
+ plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
diff --git a/gst/videocrop/gstvideocrop.h b/gst/videocrop/gstvideocrop.h
new file mode 100644
index 0000000..477f21b
--- /dev/null
+++ b/gst/videocrop/gstvideocrop.h
@@ -0,0 +1,92 @@
+/* GStreamer video frame cropping
+ * Copyright (C) 2006 Tim-Philipp Müller <tim centricular net>
+ *
+ * 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 __GST_VIDEO_CROP_H__
+#define __GST_VIDEO_CROP_H__
+
+#include <gst/base/gstbasetransform.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_VIDEO_CROP \
+ (gst_video_crop_get_type())
+#define GST_VIDEO_CROP(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_CROP,GstVideoCrop))
+#define GST_VIDEO_CROP_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_CROP,GstVideoCropClass))
+#define GST_IS_VIDEO_CROP(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_CROP))
+#define GST_IS_VIDEO_CROP_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_CROP))
+
+typedef enum {
+ VIDEO_CROP_PIXEL_FORMAT_PACKED_SIMPLE = 0, /* RGBx, AYUV */
+ VIDEO_CROP_PIXEL_FORMAT_PACKED_COMPLEX, /* UYVY, YVYU */
+ VIDEO_CROP_PIXEL_FORMAT_PLANAR /* I420, YV12 */
+} VideoCropPixelFormat;
+
+typedef struct _GstVideoCropImageDetails GstVideoCropImageDetails;
+struct _GstVideoCropImageDetails
+{
+ /*< private >*/
+ VideoCropPixelFormat packing;
+
+ guint width;
+ guint height;
+ guint size;
+
+ /* for packed RGB and YUV */
+ guint stride;
+ guint bytes_per_pixel;
+ guint8 macro_y_off; /* for YUY2, YVYU, UYVY, Y offset within macropixel in bytes */
+
+ /* for planar YUV */
+ guint y_stride, y_off;
+ guint u_stride, u_off;
+ guint v_stride, v_off;
+};
+
+typedef struct _GstVideoCrop GstVideoCrop;
+typedef struct _GstVideoCropClass GstVideoCropClass;
+
+struct _GstVideoCrop
+{
+ GstBaseTransform basetransform;
+
+ /*< private >*/
+ gint crop_left;
+ gint crop_right;
+ gint crop_top;
+ gint crop_bottom;
+
+ GstVideoCropImageDetails in; /* details of input image */
+ GstVideoCropImageDetails out; /* details of output image */
+};
+
+struct _GstVideoCropClass
+{
+ GstBaseTransformClass basetransform_class;
+};
+
+GType gst_video_crop_get_type (void);
+
+G_END_DECLS
+
+#endif /* __GST_VIDEO_CROP_H__ */
+