select: new filter to drop frames based on offset and skip
Motivation was to select only odd or even frames.
This commit is contained in:
Joshua M. Doe
parent
8b7b405381
commit
685b202541
@ -4,4 +4,5 @@ endif (OPENCV_FOUND)
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add_subdirectory (extractcolor)
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add_subdirectory (extractcolor)
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add_subdirectory (misb)
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add_subdirectory (misb)
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add_subdirectory (select)
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add_subdirectory (videoadjust)
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add_subdirectory (videoadjust)
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28
gst/select/CMakeLists.txt
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28
gst/select/CMakeLists.txt
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@ -0,0 +1,28 @@
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set (SOURCES
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gstselect.c
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)
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set (HEADERS
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gstselect.h)
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include_directories (AFTER
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${ORC_INCLUDE_DIR})
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set (libname libgstselect)
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add_library (${libname} MODULE
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${SOURCES}
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${HEADERS})
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target_link_libraries (${libname}
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${ORC_LIBRARIES}
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${GLIB2_LIBRARIES}
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${GOBJECT_LIBRARIES}
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${GSTREAMER_LIBRARY}
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${GSTREAMER_BASE_LIBRARY}
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${GSTREAMER_VIDEO_LIBRARY})
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set (pdbfile "${CMAKE_CURRENT_BINARY_DIR}/\${CMAKE_INSTALL_CONFIG_NAME}/${libname}.pdb")
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install (FILES ${pdbfile} DESTINATION lib/gstreamer-1.0 COMPONENT pdb)
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install(TARGETS ${libname}
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LIBRARY DESTINATION lib/gstreamer-1.0)
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265
gst/select/gstselect.c
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265
gst/select/gstselect.c
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@ -0,0 +1,265 @@
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/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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* Copyright (C) <2003> David Schleef <ds@schleef.org>
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* Copyright (C) 2003 Arwed v. Merkatz <v.merkatz@gmx.net>
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* Copyright (C) 2006 Mark Nauwelaerts <manauw@skynet.be>
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* Copyright (C) 2015 United States Government, Joshua M. Doe <oss@nvl.army.mil>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-select
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*
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* Selects buffers from offset and skip.
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*
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* <refsect2>
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* <title>Example launch line</title>
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* |[
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* gst-launch videotestsrc ! select ! autovideosink
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* ]|
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* </refsect2>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstselect.h"
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enum
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{
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PROP_0,
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PROP_OFFSET,
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PROP_SKIP,
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PROP_LAST
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};
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#define DEFAULT_PROP_OFFSET 0
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#define DEFAULT_PROP_SKIP 0
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/* the capabilities of the inputs and outputs */
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static GstStaticPadTemplate gst_select_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("ANY")
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);
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static GstStaticPadTemplate gst_select_src_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("ANY")
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);
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/* GObject vmethod declarations */
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static void gst_select_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_select_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_select_dispose (GObject * object);
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/* GstBaseTransform vmethod declarations */
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static GstFlowReturn gst_select_transform_ip (GstBaseTransform * trans,
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GstBuffer * buf);
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/* GstSelect method declarations */
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static void gst_select_reset (GstSelect * filter);
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/* setup debug */
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GST_DEBUG_CATEGORY_STATIC (select_debug);
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#define GST_CAT_DEFAULT select_debug
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G_DEFINE_TYPE (GstSelect, gst_select, GST_TYPE_BASE_TRANSFORM);
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/************************************************************************/
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/* GObject vmethod implementations */
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/************************************************************************/
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/**
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* gst_select_dispose:
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* @object: #GObject.
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*
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*/
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static void
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gst_select_dispose (GObject * object)
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{
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GstSelect *select = GST_SELECT (object);
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GST_DEBUG ("dispose");
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gst_select_reset (select);
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/* chain up to the parent class */
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G_OBJECT_CLASS (gst_select_parent_class)->dispose (object);
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}
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/**
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* gst_select_class_init:
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* @object: #GstSelectClass.
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*
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*/
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static void
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gst_select_class_init (GstSelectClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
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GstBaseTransformClass *gstbasetransform_class =
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GST_BASE_TRANSFORM_CLASS (klass);
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GST_DEBUG_CATEGORY_INIT (select_debug, "select", 0, "Video Levels Filter");
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GST_DEBUG ("class init");
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/* Register GObject vmethods */
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gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_select_dispose);
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gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_select_set_property);
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gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_select_get_property);
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/* Install GObject properties */
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g_object_class_install_property (gobject_class, PROP_OFFSET,
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g_param_spec_int ("offset", "Buffer offset",
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"First buffer offset to pass", 0, G_MAXINT, DEFAULT_PROP_OFFSET,
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G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE |
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GST_PARAM_MUTABLE_PLAYING));
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g_object_class_install_property (gobject_class, PROP_SKIP,
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g_param_spec_int ("skip", "Buffers to skip", "Number of buffers to skip",
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0, G_MAXINT, DEFAULT_PROP_OFFSET,
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G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE |
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GST_PARAM_MUTABLE_PLAYING));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&gst_select_sink_template));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&gst_select_src_template));
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gst_element_class_set_static_metadata (gstelement_class,
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"Select buffer filter", "Filter/Effect",
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"Selects buffers based on buffer offset",
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"Joshua M. Doe <oss@nvl.army.mil>");
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/* Register GstBaseTransform vmethods */
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gstbasetransform_class->transform_ip =
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GST_DEBUG_FUNCPTR (gst_select_transform_ip);
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}
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static void
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gst_select_init (GstSelect * trans)
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{
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GST_DEBUG_OBJECT (trans, "init class instance");
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trans->offset = DEFAULT_PROP_OFFSET;
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trans->skip = DEFAULT_PROP_SKIP;
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gst_base_transform_set_in_place (GST_BASE_TRANSFORM (trans), TRUE);
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gst_select_reset (trans);
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}
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static void
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gst_select_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstSelect *filt = GST_SELECT (object);
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GST_DEBUG_OBJECT (filt, "setting property %s", pspec->name);
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switch (prop_id) {
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case PROP_OFFSET:
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filt->offset = g_value_get_int (value);
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break;
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case PROP_SKIP:
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filt->skip = g_value_get_int (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_select_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstSelect *filt = GST_SELECT (object);
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GST_DEBUG_OBJECT (filt, "getting property %s", pspec->name);
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switch (prop_id) {
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case PROP_OFFSET:
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g_value_set_int (value, filt->offset);
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break;
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case PROP_SKIP:
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g_value_set_int (value, filt->skip);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static GstFlowReturn
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gst_select_transform_ip (GstBaseTransform * trans, GstBuffer * buf)
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{
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GstSelect *filt = GST_SELECT (trans);
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guint64 buf_offset = GST_BUFFER_OFFSET (buf);
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if (buf_offset < filt->offset) {
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GST_LOG_OBJECT (filt,
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"Dropping buffer %d since it's before the chosen offset %d",
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buf_offset, filt->offset);
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return GST_BASE_TRANSFORM_FLOW_DROPPED;
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}
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if ((filt->offset - buf_offset) % (filt->skip + 1)) {
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GST_LOG_OBJECT (filt,
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"Dropping buffer %d since it's been chosen to be skipped", buf_offset);
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return GST_BASE_TRANSFORM_FLOW_DROPPED;
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}
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return GST_FLOW_OK;
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}
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static void
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gst_select_reset (GstSelect * filt)
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{
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}
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static gboolean
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plugin_init (GstPlugin * plugin)
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{
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GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "select", 0, "select");
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GST_DEBUG ("plugin_init");
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GST_CAT_INFO (GST_CAT_DEFAULT, "registering select element");
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if (!gst_element_register (plugin, "select", GST_RANK_NONE, GST_TYPE_SELECT)) {
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return FALSE;
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}
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return TRUE;
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}
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GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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select,
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"Filter that selects which buffers to pass",
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plugin_init, GST_PACKAGE_VERSION, GST_PACKAGE_LICENSE, GST_PACKAGE_NAME,
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GST_PACKAGE_ORIGIN);
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71
gst/select/gstselect.h
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71
gst/select/gstselect.h
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@ -0,0 +1,71 @@
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/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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* Copyright (C) <2003> David Schleef <ds@schleef.org>
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* Copyright (C) 2003 Arwed v. Merkatz <v.merkatz@gmx.net>
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* Copyright (C) 2006 Mark Nauwelaerts <manauw@skynet.be>
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* Copyright (C) 2015 United States Government, Joshua M. Doe <oss@nvl.army.mil>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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||||||
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* License as published by the Free Software Foundation; either
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||||||
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* version 2 of the License, or (at your option) any later version.
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||||||
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*
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||||||
|
* This library is distributed in the hope that it will be useful,
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||||||
|
* 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.
|
||||||
|
*
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||||||
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* You should have received a copy of the GNU Library General Public
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||||||
|
* License along with this library; if not, write to the
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||||||
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_SELECT_H__
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#define __GST_SELECT_H__
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#include <gst/base/gstbasetransform.h>
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G_BEGIN_DECLS
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#define GST_TYPE_SELECT \
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(gst_select_get_type())
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#define GST_SELECT(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SELECT,GstSelect))
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#define GST_SELECT_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_SELECT,GstSelectClass))
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#define GST_IS_SELECT(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_SELECT))
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#define GST_IS_SELECT_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_SELECT))
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typedef struct _GstSelect GstSelect;
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typedef struct _GstSelectClass GstSelectClass;
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/**
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* GstSelect:
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* @element: the parent element.
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*
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*
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* The opaque GstSelect data structure.
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*/
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struct _GstSelect
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{
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GstBaseTransform element;
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/* properties */
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gint offset;
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gint skip;
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};
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struct _GstSelectClass
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{
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GstBaseTransformClass parent_class;
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};
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GType gst_select_get_type(void);
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G_END_DECLS
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#endif /* __GST_SELECT_H__ */
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Loading…
x
Reference in New Issue
Block a user