gstsparrow.c

   1 /* GStreamer
   2  * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
   3  * Copyright (C) <2003> David Schleef <ds@schleef.org>
   4  * Copyright (C) <2010> Douglas Bagnall <douglas@halo.gen.nz>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Library General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Library General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Library General Public
  17  * License along with this library; if not, write to the
  18  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19  * Boston, MA 02111-1307, USA.
  20  */
  21
  22
  23 /**
  24  * SECTION:element-sparrow
  25  *
  26  * Performs sparrow correction on a video stream.
  27  *
  28  * <refsect2>
  29  * <title>Example launch line</title>
  30  * |[
  31  * gst-launch videotestsrc ! ffmpegcolorspace ! sparrow ! ximagesink
  32  * ]|
  33  * </refsect2>
  34  */
  35
  36 #include "sparrow.h"
  37 #include "gstsparrow.h"
  38 #include <gst/video/gstvideofilter.h>
  39 #include <gst/video/video.h>
  40 GST_DEBUG_CATEGORY (sparrow_debug);
  41
  42 #include <string.h>
  43 #include <math.h>
  44
  45 /* static_functions */
  46 static void gst_sparrow_base_init(gpointer g_class);
  47 static void gst_sparrow_class_init(GstSparrowClass *g_class);
  48 static void gst_sparrow_init(GstSparrow *sparrow, GstSparrowClass *g_class);
  49 static void gst_sparrow_set_property(GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
  50 static void gst_sparrow_get_property(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
  51 static gboolean gst_sparrow_set_caps(GstBaseTransform *base, GstCaps *incaps, GstCaps *outcaps);
  52 static GstFlowReturn gst_sparrow_transform(GstBaseTransform *base, GstBuffer *inbuf, GstBuffer *outbuf);
  53 static gboolean plugin_init(GstPlugin *plugin);
  54
  55
  56 //#include <sparrow.c>
  57 #include <sparrow.h>
  58
  59
  60 /* the capabilities of the inputs and outputs.
  61  *
  62  * Use RGB, not YUV, because inverting video is trivial in RGB, not so in YUV
  63  */
  64 static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
  65     GST_PAD_SINK,
  66     GST_PAD_ALWAYS,
  67     GST_STATIC_CAPS (
  68       GST_VIDEO_CAPS_xBGR "; " GST_VIDEO_CAPS_xRGB "; "
  69       GST_VIDEO_CAPS_BGRx "; " GST_VIDEO_CAPS_RGBx)
  70     );
  71
  72 static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
  73     GST_PAD_SRC,
  74     GST_PAD_ALWAYS,
  75     GST_STATIC_CAPS (
  76       GST_VIDEO_CAPS_xBGR "; " GST_VIDEO_CAPS_xRGB "; "
  77       GST_VIDEO_CAPS_BGRx "; " GST_VIDEO_CAPS_RGBx)
  78     );
  79
  80
  81 GST_BOILERPLATE (GstSparrow, gst_sparrow, GstVideoFilter, GST_TYPE_VIDEO_FILTER);
  82
  83 /* plugin_init    - registers plugin (once)
  84    XXX_base_init  - for the gobject class (once)
  85    XXX_class_init - for global state (once)
  86    XXX_init       - for each plugin instance
  87 */
  88
  89 static void
  90 gst_sparrow_base_init (gpointer g_class)
  91 {
  92   GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
  93
  94   gst_element_class_set_details_simple (element_class, "Video sparrow correction",
  95       "Filter/Effect/Video",
  96       "Adds sparrows to a video stream",
  97       "Douglas Bagnall <douglas@halo.gen.nz>");
  98
  99   gst_element_class_add_pad_template (element_class,
 100       gst_static_pad_template_get (&sink_factory));
 101   gst_element_class_add_pad_template (element_class,
 102       gst_static_pad_template_get (&src_factory));
 103
 104   GST_INFO("gst base init\n");
 105 }
 106
 107
 108 /* Clean up */
 109 static void
 110 gst_sparrow_finalize (GObject * obj){
 111   GST_DEBUG("in gst_sparrow_finalize!\n");
 112   GstSparrow *sparrow = GST_SPARROW(obj);
 113   sparrow_finalise(sparrow);
 114 }
 115
 116 static void
 117 gst_sparrow_class_init (GstSparrowClass * g_class)
 118 {
 119   GObjectClass *gobject_class;
 120   GstBaseTransformClass *trans_class;
 121
 122   gobject_class = G_OBJECT_CLASS (g_class);
 123   trans_class = GST_BASE_TRANSFORM_CLASS (g_class);
 124
 125   gobject_class->set_property = gst_sparrow_set_property;
 126   gobject_class->get_property = gst_sparrow_get_property;
 127   gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_sparrow_finalize);
 128
 129   g_object_class_install_property (gobject_class, PROP_CALIBRATE,
 130       g_param_spec_boolean ("calibrate", "Calibrate", "calibrate against projection [on]",
 131           DEFAULT_PROP_CALIBRATE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
 132
 133   g_object_class_install_property (gobject_class, PROP_DEBUG,
 134       g_param_spec_boolean ("debug", "Debug", "add a debug screen [off]",
 135           DEFAULT_PROP_DEBUG,
 136           G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
 137
 138   g_object_class_install_property (gobject_class, PROP_RNG_SEED,
 139       g_param_spec_uint ("rngseed", "RNGSeed", "Seed for the random number generator [-1, meaning auto]",
 140           0, (guint32)-1, (guint32)DEFAULT_PROP_RNG_SEED,
 141           G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
 142
 143   trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_sparrow_set_caps);
 144   trans_class->transform = GST_DEBUG_FUNCPTR (gst_sparrow_transform);
 145   GST_INFO("gst class init\n");
 146 }
 147
 148 static void
 149 gst_sparrow_init (GstSparrow * sparrow, GstSparrowClass * g_class)
 150 {
 151   GST_INFO("gst sparrow init\n");
 152   /*disallow resizing */
 153   gst_pad_use_fixed_caps(GST_BASE_TRANSFORM_SRC_PAD(sparrow));
 154 }
 155
 156 static void
 157 gst_sparrow_set_property (GObject * object, guint prop_id, const GValue * value,
 158     GParamSpec * pspec)
 159 {
 160   GstSparrow *sparrow;
 161
 162   g_return_if_fail (GST_IS_SPARROW (object));
 163   sparrow = GST_SPARROW (object);
 164
 165   GST_DEBUG("gst_sparrow_set_property\n");
 166   if (value){
 167     switch (prop_id) {
 168     case PROP_CALIBRATE:
 169       sparrow->calibrate_flag = g_value_get_boolean(value);
 170       GST_DEBUG("Calibrate argument is %d\n", sparrow->calibrate_flag);
 171       break;
 172     case PROP_DEBUG:
 173       sparrow->debug = g_value_get_boolean(value);
 174       GST_DEBUG("debug_value is %d\n", sparrow->debug);
 175       break;
 176     case PROP_RNG_SEED:
 177       sparrow->rng_seed = g_value_get_uint(value);
 178       GST_DEBUG("rng seed is %d\n", sparrow->rng_seed);
 179       break;
 180     default:
 181       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 182       break;
 183     }
 184   }
 185 }
 186
 187 static void
 188 gst_sparrow_get_property (GObject * object, guint prop_id, GValue * value,
 189     GParamSpec * pspec)
 190 {
 191   GstSparrow *sparrow;
 192
 193   g_return_if_fail (GST_IS_SPARROW (object));
 194   sparrow = GST_SPARROW (object);
 195
 196   switch (prop_id) {
 197     case PROP_CALIBRATE:
 198       g_value_set_boolean (value, sparrow->calibrate_flag);
 199       break;
 200     case PROP_DEBUG:
 201       g_value_set_boolean(value, sparrow->debug);
 202       break;
 203     case PROP_RNG_SEED:
 204       g_value_set_uint(value, sparrow->rng_seed);
 205       break;
 206     default:
 207       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 208       break;
 209   }
 210 }
 211
 212
 213
 214 static gboolean
 215 gst_sparrow_set_caps (GstBaseTransform * base, GstCaps * incaps, GstCaps * outcaps)
 216 {
 217   GST_INFO("set_caps\n");
 218   GstSparrow *sparrow = GST_SPARROW(base);
 219
 220   GST_DEBUG_OBJECT (sparrow,
 221       "set_caps: \nin %" GST_PTR_FORMAT " \nout %" GST_PTR_FORMAT, incaps, outcaps);
 222
 223   /* set_caps gets called after set_property, so it is a good place for hooks
 224      that depend on properties and that need to be run before everything
 225      starts. */
 226
 227   return sparrow_init(sparrow, incaps, outcaps);
 228 }
 229
 230
 231
 232 static GstFlowReturn
 233 gst_sparrow_transform (GstBaseTransform * base, GstBuffer * inbuf,
 234     GstBuffer * outbuf)
 235 {
 236   GstSparrow *sparrow = GST_SPARROW(base);
 237   guint8 *indata = GST_BUFFER_DATA(inbuf);
 238   guint8 *outdata = GST_BUFFER_DATA(outbuf);
 239   guint insize = GST_BUFFER_SIZE(inbuf);
 240   guint outsize = GST_BUFFER_SIZE(outbuf);
 241
 242   if (insize != sparrow->in.size || outsize != sparrow->out.size)
 243     goto wrong_size;
 244
 245   sparrow_rotate_history(sparrow, inbuf);
 246   sparrow_transform(sparrow, indata, outdata);
 247   return GST_FLOW_OK;
 248
 249   /* ERRORS */
 250 wrong_size:
 251   {
 252     GST_ELEMENT_ERROR (sparrow, STREAM, FORMAT,
 253         (NULL), ("Invalid buffer size(s)\nIN:  size %d, expected %d\nOUT: size %d, expected %d",
 254             insize, sparrow->in.size, outsize, sparrow->out.size));
 255     return GST_FLOW_ERROR;
 256   }
 257 }
 258
 259
 260 static gboolean
 261 plugin_init (GstPlugin * plugin)
 262 {
 263   GST_DEBUG_CATEGORY_INIT (sparrow_debug, "sparrow", 0, "sparrow");
 264   GST_INFO("gst plugin init\n");
 265
 266   return gst_element_register (plugin, "sparrow", GST_RANK_NONE, GST_TYPE_SPARROW);
 267 }
 268
 269 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
 270     GST_VERSION_MINOR,
 271     "sparrow",
 272     "Add sparrows to video streams",
 273     plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);
 274
 275
 276