├── .gitignore ├── AUTHORS ├── COPYING ├── ChangeLog ├── Makefile.am ├── NEWS ├── README ├── autogen.sh ├── configure.ac └── src ├── Makefile.am ├── gstmotiondetector.c └── gstmotiondetector.h /.gitignore: -------------------------------------------------------------------------------- 1 | aclocal.m4 2 | autom4te.cache 3 | autoregen.sh 4 | config.* 5 | configure 6 | libtool 7 | INSTALL 8 | Makefile.in 9 | depcomp 10 | install-sh 11 | ltmain.sh 12 | missing 13 | stamp-* 14 | my-plugin-*.tar.* 15 | *~ 16 | *.[ao] 17 | /m4/ 18 | /build-aux/ 19 | config.* 20 | .deps/ 21 | .libs/ 22 | *.l[ao] 23 | Makefile 24 | -------------------------------------------------------------------------------- /AUTHORS: -------------------------------------------------------------------------------- 1 | Matthew Brush 2 | -------------------------------------------------------------------------------- /COPYING: -------------------------------------------------------------------------------- 1 | GNU LESSER GENERAL PUBLIC LICENSE 2 | Version 2.1, February 1999 3 | 4 | Copyright (C) 1991, 1999 Free Software Foundation, Inc. 5 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 6 | Everyone is permitted to copy and distribute verbatim copies 7 | of this license document, but changing it is not allowed. 8 | 9 | [This is the first released version of the Lesser GPL. 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Update 19 | templates to use current API. 20 | 21 | 2008-07-26 Stefan Kost 22 | 23 | * tools/make_element: 24 | Fix username detection. tries getent first and falls back to grep 25 | passwd. Spotted by Karoly Segesdi. 26 | 27 | 2008-06-09 Jan Schmidt 28 | 29 | * src/gstplugin.c: 30 | Fix some memory leaks, and make the setcaps function actually 31 | sets the caps on the other pad. 32 | 33 | 2008-05-08 Stefan Kost 34 | 35 | * README: 36 | Add simple usage explanation and make it look like the other READMEs. 37 | 38 | * src/gstplugin.c: 39 | * src/gstplugin.h: 40 | * src/gsttransform.c: 41 | * src/gsttransform.h: 42 | * tools/make_element: 43 | Add year, username and email fields. Update the templates here and 44 | there a bit. Add more comments. 45 | 46 | 2007-08-01 Tim-Philipp Müller 47 | 48 | * src/gsttransform.c: 49 | Include right header to avoid structure size mismatches etc. 50 | 51 | 2007-07-25 Tim-Philipp Müller 52 | 53 | Patch by: Steve Fink 54 | 55 | * src/gstplugin.c: 56 | Use GST_DEBUG_FUNCPTR() macros where it makes sense. 57 | 58 | 2007-07-19 Stefan Kost 59 | 60 | * configure.ac: 61 | Fix CVS-build detection. 62 | 63 | 2007-01-23 Tim-Philipp Müller 64 | 65 | * src/Makefile.am: 66 | Make clearer which Makefile variables need renaming if the plugin 67 | name is changes (#399746) (pretty it is not, but it's the content 68 | that counts, right?) 69 | 70 | 2007-01-22 Tim-Philipp Müller 71 | 72 | Patch by: Philip Jägenstedt 73 | 74 | * tools/make_element: 75 | Translate FOO_IS_MY_PLUGIN macro as well according to the template 76 | (#399323). 77 | 78 | 2006-07-04 Tim-Philipp Müller 79 | 80 | * autogen.sh: 81 | Run autoheader to create config.h.in and fix the build.` 82 | 83 | 2006-07-03 Tim-Philipp Müller 84 | 85 | * Makefile.am: 86 | * autogen.sh: 87 | * gst-autogen.sh: 88 | Throw an error if autotools versions are too old. We require 89 | automake 1.7 or newer (#346054). Add gst-autogen.sh to check 90 | for this. 91 | 92 | * COPYING: 93 | Add placeholder COPYING file so it doesn't get overwritten 94 | by a GPL one by automake. 95 | 96 | 2006-06-22 Tim-Philipp Müller 97 | 98 | Patch by: Philip Jägenstedt 99 | 100 | * src/gstplugin.c: (gst_plugin_template_base_init), 101 | (gst_plugin_template_class_init), (gst_plugin_template_init), 102 | (plugin_init): 103 | Use GST_BOILERPLATE, add debug category (#345601). 104 | 105 | 2006-04-20 Stefan Kost 106 | 107 | Patch by: Johan Rydberg 108 | 109 | * src/gstplugin.c: (gst_plugin_template_get_type), 110 | (gst_plugin_template_base_init), (gst_plugin_template_class_init), 111 | (gst_plugin_template_set_property), 112 | (gst_plugin_template_get_property): 113 | * src/gstplugin.h: 114 | * src/gsttransform.c: (gst_plugin_template_base_init), 115 | (gst_plugin_template_set_property), 116 | (gst_plugin_template_get_property): 117 | * tools/make_element: 118 | remove double gst_get_, fix '_' in names 119 | 120 | 121 | 2006-02-26 Tim-Philipp Müller 122 | 123 | * src/gstplugin.c: (gst_plugin_template_init), 124 | (gst_plugin_template_chain): 125 | Fix function declaration of _init() function. 126 | Remove unnecessary assertion clutter in chain function 127 | (that also failed to return a flow value, causing 128 | compiler warnings). 129 | 130 | 2006-02-07 Stefan Kost 131 | 132 | * src/gstplugin.c: (gst_plugin_template_set_caps), 133 | (gst_plugin_template_chain): 134 | * src/gsttransform.c: (gst_plugin_template_transform_ip): 135 | more code cleanups, more comments 136 | 137 | 2006-02-07 Stefan Kost 138 | 139 | * configure.ac: 140 | allow installing to $HOME 141 | * src/gstplugin.c: (gst_plugin_template_base_init), 142 | (gst_plugin_template_init): 143 | * src/gstplugin.h: 144 | * src/gsttransform.c: (gst_plugin_template_base_init), 145 | (gst_plugin_template_class_init), (gst_plugin_template_init), 146 | (gst_plugin_template_transform_ip), 147 | (gst_plugin_template_set_property), 148 | (gst_plugin_template_get_property), (plugin_init): 149 | * src/gsttransform.h: 150 | add another template 151 | * tools/make_element: 152 | fix generator, when template (arg2) is given 153 | 154 | 2006-01-23 Tim-Philipp Müller 155 | 156 | * src/gstplugin.h: 157 | FOO_BAR_CLASS(klass) should cast to FooBarClass*, 158 | not FooBar*. 159 | 160 | 2006-01-13 Thomas Vander Stichele 161 | 162 | * autogen.sh: 163 | * configure.ac: 164 | * src/Makefile.am: 165 | * src/gstplugin.c: 166 | bring into the 0.10 world 167 | Fix #315582 168 | 169 | 2005-12-16 Jan Schmidt 170 | 171 | * src/gstplugin.c: (gst_plugin_template_class_init): 172 | Need to have the set_property and get_property methods 173 | before installing properties 174 | 175 | 2005-12-14 Tim-Philipp Müller 176 | 177 | * src/gstplugin.h: 178 | Fix GST_IS_FOO_BAR_CLASS macro. 179 | 180 | 2005-06-30 Ronald S. Bultje 181 | 182 | * configure.ac: 183 | * src/gstplugin.c: (gst_plugin_template_set_caps), 184 | (gst_plugin_template_init), (gst_plugin_template_chain): 185 | Fix for GStreamer 0.9. 186 | 187 | 2004-04-22 Thomas Vander Stichele 188 | 189 | * Makefile.am: 190 | * autogen.sh: 191 | * configure.ac: 192 | * src/Makefile.am: 193 | use proper LDFLAGS for plugins 194 | run in maintainer mode by default 195 | 196 | 2004-04-22 Thomas Vander Stichele 197 | 198 | * configure.ac: ... and fix comments too 199 | 200 | 2004-04-03 Benjamin Otte 201 | 202 | * configure.ac: 203 | update for GStreamer 0.8 204 | 205 | 2004-01-25 Ronald Bultje 206 | 207 | * src/gstplugin.c: (gst_plugin_template_link), 208 | (gst_plugin_template_base_init), (gst_plugin_template_init): 209 | Fix for GStreamer 0.7.x. 210 | 211 | 2003-02-06 Thomas Vander Stichele 212 | 213 | * updated for GStreamer 0.6.0 214 | 215 | 2002-07-17 Thomas Vander Stichele 216 | 217 | * initial creation on a flight to New York 218 | -------------------------------------------------------------------------------- /Makefile.am: -------------------------------------------------------------------------------- 1 | SUBDIRS = src 2 | EXTRA_DIST = autogen.sh 3 | -------------------------------------------------------------------------------- /NEWS: -------------------------------------------------------------------------------- 1 | 2 | -------------------------------------------------------------------------------- /README: -------------------------------------------------------------------------------- 1 | GStreamer Motion Detector Plugin 2 | ================================ 3 | 4 | This is a simple GStreamer plugin that detects motion in a video 5 | stream in a Gstreamer pipeline. The element has one sink pad and 6 | one source pad, both only support 24-bit RGB formats. 7 | 8 | Connect the element inline with your video stream and either watch 9 | the elements `notify::motion-detected` signal or watch for application 10 | bus messages containing motion information. 11 | 12 | The plugin uses OpenCV to find moving blobs against an averaged 13 | background scene. It's not super-robust but it's still quite 14 | accurate. You can tweak the element properties to improve detection 15 | somewhat. 16 | 17 | Here's a sample pipeline: 18 | 19 | $ gst-launch -v --gst-plugin-path=$PLUGIN_PATH \ 20 | autovideosrc ! \ 21 | video/x-raw-rgb ! \ 22 | motiondetector draw_motion=true rate_limit=500 ! \ 23 | ffmpegcolorspace ! \ 24 | queue ! \ 25 | autovideosink 26 | -------------------------------------------------------------------------------- /autogen.sh: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | # you can either set the environment variables AUTOCONF, AUTOHEADER, AUTOMAKE, 3 | # ACLOCAL, AUTOPOINT and/or LIBTOOLIZE to the right versions, or leave them 4 | # unset and get the defaults 5 | 6 | mkdir -p build-aux || { 7 | echo 'failed creating auxiliary build files directory'; 8 | exit 1; 9 | } 10 | 11 | autoreconf -vfi || { 12 | echo 'autogen.sh failed'; 13 | exit 1; 14 | } 15 | -------------------------------------------------------------------------------- /configure.ac: -------------------------------------------------------------------------------- 1 | dnl required version of autoconf 2 | AC_PREREQ([2.53]) 3 | AC_INIT([motiondetector],[0.10.0]) 4 | 5 | dnl required versions of gstreamer and plugins-base 6 | GST_REQUIRED=0.10.16 7 | GSTPB_REQUIRED=0.10.16 8 | 9 | AC_CONFIG_SRCDIR([src/gstmotiondetector.c]) 10 | AC_CONFIG_HEADERS([src/config.h]) 11 | AC_CONFIG_MACRO_DIR([m4]) 12 | AC_CONFIG_AUX_DIR([build-aux]) 13 | 14 | dnl required version of automake 15 | AM_INIT_AUTOMAKE([foreign silent-rules]) 16 | AM_SILENT_RULES([yes]) 17 | 18 | dnl enable mainainer mode by default 19 | AM_MAINTAINER_MODE([enable]) 20 | 21 | dnl check for tools (compiler etc.) 22 | AC_PROG_CC 23 | 24 | dnl required version of libtool 25 | LT_PREREQ([2.2.6]) 26 | LT_INIT 27 | 28 | dnl give error and exit if we dont have pkgconfig 29 | AC_CHECK_PROG(HAVE_PKGCONFIG, pkg-config, [ ], [ 30 | AC_MSG_ERROR([You need to have pkg-config installed!]) 31 | ]) 32 | 33 | dnl Check for the required version of GStreamer core (and gst-plugins-base) 34 | dnl This will export GST_CFLAGS and GST_LIBS variables for use in Makefile.am 35 | dnl 36 | dnl If you need libraries from gst-plugins-base here, also add: 37 | dnl for libgstaudio-0.10: gstreamer-audio-0.10 >= $GST_REQUIRED 38 | dnl for libgstvideo-0.10: gstreamer-video-0.10 >= $GST_REQUIRED 39 | dnl for libgsttag-0.10: gstreamer-tag-0.10 >= $GST_REQUIRED 40 | dnl for libgstpbutils-0.10: gstreamer-pbutils-0.10 >= $GST_REQUIRED 41 | dnl for libgstfft-0.10: gstreamer-fft-0.10 >= $GST_REQUIRED 42 | dnl for libgstinterfaces-0.10: gstreamer-interfaces-0.10 >= $GST_REQUIRED 43 | dnl for libgstrtp-0.10: gstreamer-rtp-0.10 >= $GST_REQUIRED 44 | dnl for libgstrtsp-0.10: gstreamer-rtsp-0.10 >= $GST_REQUIRED 45 | dnl etc. 46 | PKG_CHECK_MODULES(GST, [ 47 | gstreamer-0.10 >= $GST_REQUIRED 48 | gstreamer-base-0.10 >= $GST_REQUIRED 49 | gstreamer-controller-0.10 >= $GST_REQUIRED 50 | ], [ 51 | AC_SUBST(GST_CFLAGS) 52 | AC_SUBST(GST_LIBS) 53 | ], [ 54 | AC_MSG_ERROR([ 55 | You need to install or upgrade the GStreamer development 56 | packages on your system. On debian-based systems these are 57 | libgstreamer0.10-dev and libgstreamer-plugins-base0.10-dev. 58 | on RPM-based systems gstreamer0.10-devel, libgstreamer0.10-devel 59 | or similar. The minimum version required is $GST_REQUIRED. 60 | ]) 61 | ]) 62 | 63 | PKG_CHECK_MODULES(OPENCV, [opencv >= 2.1]) 64 | 65 | dnl check if compiler understands -Wall (if yes, add -Wall to GST_CFLAGS) 66 | AC_MSG_CHECKING([to see if compiler understands -Wall]) 67 | save_CFLAGS="$CFLAGS" 68 | CFLAGS="$CFLAGS -Wall" 69 | AC_COMPILE_IFELSE([AC_LANG_PROGRAM([ ], [ ])], [ 70 | GST_CFLAGS="$GST_CFLAGS -Wall" 71 | AC_MSG_RESULT([yes]) 72 | ], [ 73 | AC_MSG_RESULT([no]) 74 | ]) 75 | 76 | dnl set the plugindir where plugins should be installed (for src/Makefile.am) 77 | if test "x${prefix}" = "x$HOME"; then 78 | plugindir="$HOME/.gstreamer-0.10/plugins" 79 | else 80 | plugindir="\$(libdir)/gstreamer-0.10" 81 | fi 82 | AC_SUBST(plugindir) 83 | 84 | dnl set proper LDFLAGS for plugins 85 | GST_PLUGIN_LDFLAGS='-module -avoid-version -export-symbols-regex [_]*\(gst_\|Gst\|GST_\).*' 86 | AC_SUBST(GST_PLUGIN_LDFLAGS) 87 | 88 | AC_CONFIG_FILES([Makefile src/Makefile]) 89 | AC_OUTPUT 90 | 91 | -------------------------------------------------------------------------------- /src/Makefile.am: -------------------------------------------------------------------------------- 1 | plugin_LTLIBRARIES = libgstmotiondetector.la 2 | 3 | libgstmotiondetector_la_SOURCES = gstmotiondetector.c gstmotiondetector.h 4 | libgstmotiondetector_la_CFLAGS = $(GST_CFLAGS) @OPENCV_CFLAGS@ 5 | libgstmotiondetector_la_LIBADD = $(GST_LIBS) @OPENCV_LIBS@ 6 | libgstmotiondetector_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS) 7 | libgstmotiondetector_la_LIBTOOLFLAGS = --tag=disable-static 8 | -------------------------------------------------------------------------------- /src/gstmotiondetector.c: -------------------------------------------------------------------------------- 1 | /* 2 | * gstmotiondetector.c 3 | * Copyright Matthew Brush 4 | * See COPYING file for license information. 5 | */ 6 | #ifdef HAVE_CONFIG_H 7 | # include 8 | #endif 9 | 10 | #include 11 | #include 12 | 13 | #include "gstmotiondetector.h" 14 | 15 | 16 | GST_DEBUG_CATEGORY_STATIC (gst_motion_detector_debug); 17 | #define GST_CAT_DEFAULT gst_motion_detector_debug 18 | 19 | 20 | #define DEFAULT_MOTION_DETECTED FALSE 21 | #define DEFAULT_POST_MESSAGES FALSE 22 | #define DEFAULT_DRAW_MOTION FALSE 23 | #define DEFAULT_AVG_WEIGHT 0.02 24 | #define DEFAULT_THRESHOLD 70 25 | #define DEFAULT_DILATE_ITERATIONS 18 26 | #define DEFAULT_ERODE_ITERATIONS 10 27 | #define DEFAULT_MIN_BLOB_SIZE 10 28 | #define DEFAULT_NUM_BLOBS 0 29 | #define DEFAULT_RATE_LIMIT 500 30 | 31 | 32 | enum 33 | { 34 | LAST_SIGNAL 35 | }; 36 | 37 | 38 | enum 39 | { 40 | PROP_0, 41 | PROP_MOTION_DETECTED, 42 | PROP_POST_MESSAGES, 43 | PROP_DRAW_MOTION, 44 | PROP_AVG_WEIGHT, 45 | PROP_THRESHOLD, 46 | PROP_DILATE_ITERATIONS, 47 | PROP_ERODE_ITERATIONS, 48 | PROP_MINIMUM_BLOB_SIZE, 49 | PROP_NUM_BLOBS, 50 | PROP_RATE_LIMIT 51 | }; 52 | 53 | 54 | static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink", 55 | GST_PAD_SINK, 56 | GST_PAD_ALWAYS, 57 | GST_STATIC_CAPS ("video/x-raw-rgb,bpp=24,depth=24,endianess=4321") 58 | ); 59 | 60 | 61 | static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src", 62 | GST_PAD_SRC, 63 | GST_PAD_ALWAYS, 64 | GST_STATIC_CAPS ("video/x-raw-rgb,bpp=24,depth=24,endianess=4321") 65 | ); 66 | 67 | 68 | GST_BOILERPLATE (GstMotionDetector, gst_motion_detector, GstElement, 69 | GST_TYPE_ELEMENT); 70 | 71 | 72 | static void gst_motion_detector_set_property (GObject * object, guint prop_id, 73 | const GValue * value, GParamSpec * pspec); 74 | static void gst_motion_detector_get_property (GObject * object, guint prop_id, 75 | GValue * value, GParamSpec * pspec); 76 | static void gst_motion_detector_finalize (GObject *obj); 77 | 78 | static gboolean gst_motion_detector_set_caps (GstPad * pad, GstCaps * caps); 79 | static GstFlowReturn gst_motion_detector_chain (GstPad * pad, GstBuffer * buf); 80 | 81 | static gboolean gst_motion_detector_get_frame_size (GstBuffer *buf, gint *width, gint *height); 82 | static IplImage* gst_motion_detector_gst_buffer_to_ipl_image (GstBuffer *buf, gint width, gint height); 83 | static GstBuffer *gst_motion_detector_buffer_set_from_ipl_image (GstBuffer *buf, IplImage *img); 84 | static IplImage *gst_motion_detector_process_image (GstMotionDetector *filter, IplImage *src); 85 | 86 | 87 | static void 88 | gst_motion_detector_base_init (gpointer gclass) 89 | { 90 | GstElementClass *element_class = GST_ELEMENT_CLASS (gclass); 91 | 92 | gst_element_class_set_details_simple(element_class, 93 | "MotionDetector", 94 | "Analyzer/Video", 95 | "Detects motion in video streams", 96 | "Matthew Brush "); 97 | 98 | gst_element_class_add_pad_template (element_class, 99 | gst_static_pad_template_get (&src_factory)); 100 | gst_element_class_add_pad_template (element_class, 101 | gst_static_pad_template_get (&sink_factory)); 102 | } 103 | 104 | 105 | static void 106 | gst_motion_detector_class_init (GstMotionDetectorClass * klass) 107 | { 108 | GObjectClass *gobject_class; 109 | 110 | gobject_class = (GObjectClass *) klass; 111 | 112 | gobject_class->set_property = gst_motion_detector_set_property; 113 | gobject_class->get_property = gst_motion_detector_get_property; 114 | gobject_class->finalize = gst_motion_detector_finalize; 115 | 116 | g_object_class_install_property (gobject_class, PROP_MOTION_DETECTED, 117 | g_param_spec_boolean ("motion-detected", "MotionDetected", 118 | "Whether or not motion was detected", DEFAULT_MOTION_DETECTED, 119 | G_PARAM_READABLE)); 120 | 121 | g_object_class_install_property (gobject_class, PROP_POST_MESSAGES, 122 | g_param_spec_boolean ("post-messages", "PostMessages", 123 | "Whether or not to post messages on the bus", DEFAULT_POST_MESSAGES, 124 | G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); 125 | 126 | g_object_class_install_property (gobject_class, PROP_DRAW_MOTION, 127 | g_param_spec_boolean ("draw-motion", "DrawMotion", 128 | "Whether or not to draw areas where motion was detected.", DEFAULT_DRAW_MOTION, 129 | G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); 130 | 131 | g_object_class_install_property (gobject_class, PROP_AVG_WEIGHT, 132 | g_param_spec_double ("avg-weight", "AvgWeight", 133 | "Weight new frames are given when added to the running average", 134 | 0.0, 1.0, DEFAULT_AVG_WEIGHT, G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); 135 | 136 | g_object_class_install_property (gobject_class, PROP_THRESHOLD, 137 | g_param_spec_uint ("threshold", "Threshold", 138 | "The threshold level used when converting to a binary image", 139 | 0, 255, DEFAULT_THRESHOLD, G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); 140 | 141 | g_object_class_install_property (gobject_class, PROP_DILATE_ITERATIONS, 142 | g_param_spec_uint ("dilate-iterations", "DilateIterations", 143 | "Number of times the binary image is dilated", 144 | 0, 255, DEFAULT_DILATE_ITERATIONS, G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); 145 | 146 | g_object_class_install_property (gobject_class, PROP_ERODE_ITERATIONS, 147 | g_param_spec_uint ("erode-iterations", "ErodeIterations", 148 | "Number of times the binary image is eroded", 149 | 0, 255, DEFAULT_ERODE_ITERATIONS, G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); 150 | 151 | g_object_class_install_property (gobject_class, PROP_MINIMUM_BLOB_SIZE, 152 | g_param_spec_uint ("minimum-blob-size", "MinimumBlobSize", 153 | "Minimum height or width of blob to be considered", 154 | 0, 255, DEFAULT_MIN_BLOB_SIZE, G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); 155 | 156 | g_object_class_install_property (gobject_class, PROP_NUM_BLOBS, 157 | g_param_spec_uint ("num-blobs", "NumBlobs", 158 | "Number of blobs in the frame", 0, 255, DEFAULT_NUM_BLOBS, 159 | G_PARAM_READABLE)); 160 | 161 | g_object_class_install_property (gobject_class, PROP_RATE_LIMIT, 162 | g_param_spec_uint ("rate-limit", "RateLimit", 163 | "Number of milliseconds before allowing another detection", 164 | 0, G_MAXUINT, DEFAULT_RATE_LIMIT, G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); 165 | } 166 | 167 | 168 | static void 169 | gst_motion_detector_init (GstMotionDetector * filter, GstMotionDetectorClass * gclass) 170 | { 171 | filter->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink"); 172 | gst_pad_set_setcaps_function (filter->sinkpad, 173 | GST_DEBUG_FUNCPTR(gst_motion_detector_set_caps)); 174 | gst_pad_set_getcaps_function (filter->sinkpad, 175 | GST_DEBUG_FUNCPTR(gst_pad_proxy_getcaps)); 176 | gst_pad_set_chain_function (filter->sinkpad, 177 | GST_DEBUG_FUNCPTR(gst_motion_detector_chain)); 178 | 179 | filter->srcpad = gst_pad_new_from_static_template (&src_factory, "src"); 180 | gst_pad_set_getcaps_function (filter->srcpad, 181 | GST_DEBUG_FUNCPTR(gst_pad_proxy_getcaps)); 182 | 183 | gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad); 184 | gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad); 185 | 186 | filter->motion_detected = DEFAULT_MOTION_DETECTED; 187 | filter->post_messages = DEFAULT_POST_MESSAGES; 188 | filter->draw_motion = DEFAULT_DRAW_MOTION; 189 | filter->avg_weight = DEFAULT_AVG_WEIGHT; 190 | filter->threshold = DEFAULT_THRESHOLD; 191 | filter->dilate_iterations = DEFAULT_DILATE_ITERATIONS; 192 | filter->erode_iterations = DEFAULT_ERODE_ITERATIONS; 193 | filter->min_blob_size = DEFAULT_MIN_BLOB_SIZE; 194 | filter->num_blobs = DEFAULT_NUM_BLOBS; 195 | filter->rate_limit = DEFAULT_RATE_LIMIT; 196 | filter->rate_inhibit = FALSE; 197 | filter->run_avg = NULL; 198 | } 199 | 200 | 201 | static void 202 | gst_motion_detector_finalize (GObject *obj) 203 | { 204 | GstMotionDetector *filter; 205 | GstMotionDetectorClass *klass; 206 | GstElementClass *parent_class; 207 | 208 | filter = GST_MOTION_DETECTOR (obj); 209 | klass = G_TYPE_INSTANCE_GET_CLASS (filter, GST_TYPE_MOTION_DETECTOR, GstMotionDetectorClass); 210 | parent_class = g_type_class_peek_parent (klass); 211 | 212 | if (filter->run_avg) 213 | cvReleaseImage (&(filter->run_avg)); 214 | 215 | G_OBJECT_CLASS (parent_class)->finalize (obj); 216 | } 217 | 218 | 219 | static void 220 | gst_motion_detector_set_property (GObject * object, guint prop_id, 221 | const GValue * value, GParamSpec * pspec) 222 | { 223 | GstMotionDetector *filter = GST_MOTION_DETECTOR (object); 224 | 225 | switch (prop_id) 226 | { 227 | case PROP_POST_MESSAGES: 228 | filter->post_messages = g_value_get_boolean (value); 229 | break; 230 | case PROP_DRAW_MOTION: 231 | filter->draw_motion = g_value_get_boolean (value); 232 | break; 233 | case PROP_AVG_WEIGHT: 234 | filter->avg_weight = g_value_get_double (value); 235 | break; 236 | case PROP_THRESHOLD: 237 | filter->threshold = g_value_get_uint (value); 238 | break; 239 | case PROP_DILATE_ITERATIONS: 240 | filter->dilate_iterations = g_value_get_uint (value); 241 | break; 242 | case PROP_ERODE_ITERATIONS: 243 | filter->erode_iterations = g_value_get_uint (value); 244 | break; 245 | case PROP_MINIMUM_BLOB_SIZE: 246 | filter->min_blob_size = g_value_get_uint (value); 247 | break; 248 | case PROP_RATE_LIMIT: 249 | filter->rate_limit = g_value_get_uint (value); 250 | break; 251 | default: 252 | G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); 253 | break; 254 | } 255 | } 256 | 257 | 258 | static void 259 | gst_motion_detector_get_property (GObject * object, guint prop_id, 260 | GValue * value, GParamSpec * pspec) 261 | { 262 | GstMotionDetector *filter = GST_MOTION_DETECTOR (object); 263 | 264 | switch (prop_id) 265 | { 266 | case PROP_MOTION_DETECTED: 267 | g_value_set_boolean (value, filter->motion_detected); 268 | break; 269 | case PROP_POST_MESSAGES: 270 | g_value_set_boolean (value, filter->post_messages); 271 | break; 272 | case PROP_DRAW_MOTION: 273 | g_value_set_boolean (value, filter->draw_motion); 274 | break; 275 | case PROP_AVG_WEIGHT: 276 | g_value_set_double (value, filter->avg_weight); 277 | break; 278 | case PROP_THRESHOLD: 279 | g_value_set_uint (value, filter->threshold); 280 | break; 281 | case PROP_DILATE_ITERATIONS: 282 | g_value_set_uint (value, filter->dilate_iterations); 283 | break; 284 | case PROP_ERODE_ITERATIONS: 285 | g_value_set_uint (value, filter->erode_iterations); 286 | break; 287 | case PROP_MINIMUM_BLOB_SIZE: 288 | g_value_set_uint (value, filter->min_blob_size); 289 | break; 290 | case PROP_NUM_BLOBS: 291 | g_value_set_uint (value, filter->num_blobs); 292 | break; 293 | case PROP_RATE_LIMIT: 294 | g_value_set_uint (value, filter->rate_limit); 295 | break; 296 | default: 297 | G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); 298 | break; 299 | } 300 | } 301 | 302 | 303 | static gboolean 304 | gst_motion_detector_set_caps (GstPad * pad, GstCaps * caps) 305 | { 306 | GstMotionDetector *filter; 307 | GstPad *otherpad; 308 | 309 | filter = GST_MOTION_DETECTOR (gst_pad_get_parent (pad)); 310 | otherpad = (pad == filter->srcpad) ? filter->sinkpad : filter->srcpad; 311 | gst_object_unref (filter); 312 | 313 | return gst_pad_set_caps (otherpad, caps); 314 | } 315 | 316 | 317 | static gboolean 318 | gst_motion_detector_rate_timeout (GstMotionDetector *filter) 319 | { 320 | filter->rate_inhibit = FALSE; 321 | return FALSE; 322 | } 323 | 324 | 325 | static GstFlowReturn 326 | gst_motion_detector_chain (GstPad * pad, GstBuffer * buf) 327 | { 328 | GstMotionDetector *filter; 329 | IplImage *img; 330 | 331 | filter = GST_MOTION_DETECTOR (GST_OBJECT_PARENT (pad)); 332 | 333 | img = gst_motion_detector_gst_buffer_to_ipl_image (buf, -1, -1); 334 | img = gst_motion_detector_process_image (filter, img); 335 | 336 | if (filter->draw_motion) 337 | gst_motion_detector_buffer_set_from_ipl_image (buf, img); 338 | 339 | cvReleaseImage (&img); 340 | 341 | if (!filter->rate_inhibit) 342 | { 343 | GstBus *bus; 344 | GstMessage *msg; 345 | 346 | bus = gst_element_get_bus (GST_ELEMENT (filter)); 347 | 348 | if (filter->num_blobs > 0) 349 | { 350 | if (!filter->motion_detected) 351 | { 352 | filter->motion_detected = TRUE; 353 | g_object_notify (G_OBJECT (filter), "motion-detected"); 354 | if (filter->post_messages) 355 | { 356 | msg = gst_message_new_application (GST_OBJECT (filter), 357 | gst_structure_new ("motion-data", 358 | "motion-detected", G_TYPE_BOOLEAN, TRUE, 359 | "num-blobs", G_TYPE_UINT, filter->num_blobs, NULL)); 360 | gst_bus_post (bus, msg); 361 | } 362 | } 363 | } 364 | else 365 | { 366 | if (filter->motion_detected) 367 | { 368 | filter->motion_detected = FALSE; 369 | g_object_notify (G_OBJECT (filter), "motion-detected"); 370 | if (filter->post_messages) 371 | { 372 | msg = gst_message_new_application (GST_OBJECT (filter), 373 | gst_structure_new ("motion-data", 374 | "motion-detected", G_TYPE_BOOLEAN, FALSE, 375 | "num-blobs", G_TYPE_UINT, 0, NULL)); 376 | gst_bus_post (bus, msg); 377 | } 378 | } 379 | } 380 | 381 | if (filter->rate_limit > 0) 382 | { 383 | filter->rate_inhibit = TRUE; 384 | g_timeout_add (filter->rate_limit, 385 | (GSourceFunc) gst_motion_detector_rate_timeout, filter); 386 | } 387 | 388 | gst_object_unref (bus); 389 | } 390 | 391 | return gst_pad_push (filter->srcpad, buf); 392 | } 393 | 394 | 395 | static gboolean gst_motion_detector_get_frame_size (GstBuffer *buf, gint *width, gint *height) 396 | { 397 | const GstStructure *str; 398 | gint w = 0, h = 0; 399 | 400 | if (!gst_caps_is_fixed (buf->caps)) 401 | return FALSE; 402 | 403 | str = gst_caps_get_structure (buf->caps, 0); 404 | 405 | if (!gst_structure_get_int (str, "width", &w) || 406 | !gst_structure_get_int (str, "height", &h)) 407 | { 408 | return FALSE; 409 | } 410 | 411 | if (width) 412 | *width = w; 413 | 414 | if (height) 415 | *height = h; 416 | 417 | return TRUE; 418 | } 419 | 420 | 421 | static IplImage* 422 | gst_motion_detector_gst_buffer_to_ipl_image (GstBuffer *buf, gint width, gint height) 423 | { 424 | IplImage *orig, *img; 425 | gint w = -1, h = -1, y, x; 426 | guint8 r, g, b; 427 | guchar *ptr; 428 | 429 | if (!gst_motion_detector_get_frame_size (buf, &w, &h)) 430 | return NULL; 431 | 432 | orig = cvCreateImage (cvSize (w, h), IPL_DEPTH_8U, 3); 433 | ptr = buf->data; 434 | 435 | for (y = 0; y < h; y++) 436 | { 437 | for (x = 0; x < w; x++) 438 | { 439 | r = *ptr++; 440 | g = *ptr++; 441 | b = *ptr++; 442 | cvSet2D (orig, y, x, cvScalar (b, g, r, 0)); 443 | } 444 | } 445 | 446 | if (width > 0 && height > 0) 447 | { 448 | img = cvCreateImage (cvSize (width, height), IPL_DEPTH_8U, 3); 449 | cvResize (orig, img, CV_INTER_LINEAR); 450 | cvReleaseImage (&orig); 451 | orig = img; 452 | } 453 | 454 | return orig; 455 | } 456 | 457 | 458 | static GstBuffer * 459 | gst_motion_detector_buffer_set_from_ipl_image (GstBuffer *buf, IplImage *img) 460 | { 461 | gint y, x; 462 | CvScalar pixel; 463 | guchar *ptr; 464 | IplImage *dst; 465 | ptr = buf->data; 466 | gint w, h; 467 | 468 | if (!gst_motion_detector_get_frame_size (buf, &w, &h)) 469 | return NULL; 470 | 471 | dst = cvCreateImage (cvSize (w, h), IPL_DEPTH_8U, 3); 472 | 473 | cvResize (img, dst, CV_INTER_LINEAR); 474 | 475 | for (y = 0; y < dst->height; y++) 476 | { 477 | for (x = 0; x < dst->width; x++) 478 | { 479 | pixel = cvGet2D (dst, y, x); 480 | *ptr++ = pixel.val[2]; 481 | *ptr++ = pixel.val[1]; 482 | *ptr++ = pixel.val[0]; 483 | } 484 | } 485 | 486 | cvReleaseImage (&dst); 487 | 488 | return buf; 489 | } 490 | 491 | 492 | static IplImage * 493 | gst_motion_detector_process_image (GstMotionDetector *filter, IplImage *src) 494 | { 495 | gint num_blobs = 0; 496 | IplImage *diff, *tmp, *gr; 497 | CvMemStorage *store = cvCreateMemStorage (0); 498 | CvSeq *contour = NULL; 499 | CvRect bind_rect = cvRect (0, 0, 0, 0); 500 | 501 | if (!filter->run_avg) 502 | { 503 | filter->run_avg = cvCreateImage (cvGetSize (src), IPL_DEPTH_32F, 3); 504 | cvConvertScale (src, filter->run_avg, 1.0, 0.0); 505 | } 506 | else 507 | cvRunningAvg(src, filter->run_avg, filter->avg_weight, NULL); 508 | 509 | tmp = cvCreateImage (cvGetSize (src), IPL_DEPTH_8U, 3); 510 | cvConvertScale (filter->run_avg, tmp, 1.0, 0.0); 511 | 512 | diff = cvCreateImage (cvGetSize (src), IPL_DEPTH_8U, 3); 513 | cvAbsDiff (src, tmp, diff); 514 | 515 | gr = cvCreateImage (cvGetSize (src), IPL_DEPTH_8U, 1); 516 | cvCvtColor (diff, gr, CV_RGB2GRAY); 517 | 518 | cvThreshold (gr, gr, filter->threshold, 255, CV_THRESH_BINARY); 519 | cvDilate (gr, gr, 0, filter->dilate_iterations); 520 | cvErode (gr, gr, 0,filter->erode_iterations); 521 | 522 | cvFindContours (gr, store, &contour, sizeof (CvContour), 523 | CV_RETR_CCOMP, CV_CHAIN_APPROX_SIMPLE, cvPoint (0, 0)); 524 | 525 | for (; contour != NULL; contour = contour->h_next) 526 | { 527 | bind_rect = cvBoundingRect (contour, 0); 528 | 529 | if (bind_rect.width < filter->min_blob_size || 530 | bind_rect.height < filter->min_blob_size) 531 | { 532 | continue; 533 | } 534 | 535 | num_blobs++; 536 | 537 | if (filter->draw_motion) 538 | { 539 | cvRectangle (src, cvPoint (bind_rect.x, bind_rect.y), 540 | cvPoint (bind_rect.x + bind_rect.width, 541 | bind_rect.y + bind_rect.height), 542 | CV_RGB (255, 0, 0), 1, 8, 0); 543 | } 544 | } 545 | 546 | cvReleaseImage (&tmp); 547 | cvReleaseImage (&diff); 548 | cvReleaseImage (&gr); 549 | 550 | filter->num_blobs = num_blobs; 551 | 552 | return src; 553 | } 554 | 555 | 556 | static gboolean 557 | motiondetector_init (GstPlugin * motiondetector) 558 | { 559 | GST_DEBUG_CATEGORY_INIT (gst_motion_detector_debug, "motiondetector", 560 | 0, "Detects motion in video streams"); 561 | 562 | return gst_element_register (motiondetector, "motiondetector", GST_RANK_NONE, 563 | GST_TYPE_MOTION_DETECTOR); 564 | } 565 | 566 | 567 | #ifndef PACKAGE 568 | #define PACKAGE "motiondetector" 569 | #endif 570 | 571 | 572 | GST_PLUGIN_DEFINE ( 573 | GST_VERSION_MAJOR, 574 | GST_VERSION_MINOR, 575 | "motiondetector", 576 | "Detects motion in video streams", 577 | motiondetector_init, 578 | VERSION, 579 | "LGPL", 580 | "GStreamer", 581 | "http://gstreamer.net/" 582 | ) 583 | -------------------------------------------------------------------------------- /src/gstmotiondetector.h: -------------------------------------------------------------------------------- 1 | /* 2 | * gstmotiondetector.h 3 | * Copyright Matthew Brush 4 | * See COPYING file for license information. 5 | */ 6 | #ifndef PLUGIN_H__ 7 | #define PLUGIN_H__ 1 8 | 9 | #include 10 | #include 11 | 12 | G_BEGIN_DECLS 13 | 14 | #define GST_TYPE_MOTION_DETECTOR (gst_motion_detector_get_type()) 15 | #define GST_MOTION_DETECTOR(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MOTION_DETECTOR,GstMotionDetector)) 16 | #define GST_MOTION_DETECTOR_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MOTION_DETECTOR,GstMotionDetectorClass)) 17 | #define GST_IS_MOTION_DETECTOR(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MOTION_DETECTOR)) 18 | #define GST_IS_MOTION_DETECTOR_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MOTION_DETECTOR)) 19 | 20 | typedef struct _GstMotionDetector GstMotionDetector; 21 | typedef struct _GstMotionDetectorClass GstMotionDetectorClass; 22 | 23 | struct _GstMotionDetector 24 | { 25 | GstElement element; 26 | 27 | GstPad *sinkpad, *srcpad; 28 | 29 | gboolean motion_detected; 30 | gboolean post_messages; 31 | gboolean draw_motion; 32 | 33 | gdouble avg_weight; 34 | guint threshold; 35 | guint dilate_iterations; 36 | guint erode_iterations; 37 | guint min_blob_size; 38 | guint num_blobs; 39 | guint rate_limit; 40 | gboolean rate_inhibit; 41 | 42 | IplImage *run_avg; 43 | }; 44 | 45 | struct _GstMotionDetectorClass 46 | { 47 | GstElementClass parent_class; 48 | }; 49 | 50 | GType gst_motion_detector_get_type (void); 51 | 52 | 53 | G_END_DECLS 54 | 55 | #endif /* PLUGIN_H__ */ 56 | --------------------------------------------------------------------------------