diff options
author | David Schleef <ds@schleef.org> | 2011-02-26 16:20:52 -0800 |
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committer | David Schleef <ds@schleef.org> | 2011-03-07 00:14:29 -0800 |
commit | 82c60bdc449db560201dc17492fdd39168b625d6 (patch) | |
tree | d031c4b855302d965a46025a7605ce05fc9e2971 /gst/videofilters | |
parent | b45e5833c25b0c4034d7355a652a61495dc75f51 (diff) | |
download | gstreamer-plugins-bad-82c60bdc449db560201dc17492fdd39168b625d6.tar.gz |
zebrastripe: New element
Adds zebra stripes to overexposed video.
Diffstat (limited to 'gst/videofilters')
-rw-r--r-- | gst/videofilters/Makefile.am | 25 | ||||
-rw-r--r-- | gst/videofilters/gstvideofiltersbad.c | 43 | ||||
-rw-r--r-- | gst/videofilters/gstzebrastripe.c | 353 | ||||
-rw-r--r-- | gst/videofilters/gstzebrastripe.h | 64 |
4 files changed, 485 insertions, 0 deletions
diff --git a/gst/videofilters/Makefile.am b/gst/videofilters/Makefile.am new file mode 100644 index 000000000..aa9cea2cf --- /dev/null +++ b/gst/videofilters/Makefile.am @@ -0,0 +1,25 @@ +plugin_LTLIBRARIES = libgstvideofiltersbad.la + +#ORC_SOURCE=gstvideofiltersbadorc +#include $(top_srcdir)/common/orc.mak + +libgstvideofiltersbad_la_SOURCES = \ + gstzebrastripe.c \ + gstvideofiltersbad.c +#nodist_libgstvideofiltersbad_la_SOURCES = $(ORC_NODIST_SOURCES) +libgstvideofiltersbad_la_CFLAGS = \ + $(GST_PLUGINS_BASE_CFLAGS) \ + $(GST_CFLAGS) \ + $(ORC_CFLAGS) +libgstvideofiltersbad_la_LIBADD = \ + $(GST_PLUGINS_BASE_LIBS) -lgstvideo-$(GST_MAJORMINOR) \ + $(GST_BASE_LIBS) \ + $(GST_LIBS) \ + $(ORC_LIBS) +libgstvideofiltersbad_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS) +libgstvideofiltersbad_la_LIBTOOLFLAGS = --tag=disable-static + +noinst_HEADERS = \ + gstzebrastripe.h + + diff --git a/gst/videofilters/gstvideofiltersbad.c b/gst/videofilters/gstvideofiltersbad.c new file mode 100644 index 000000000..f05ace5ee --- /dev/null +++ b/gst/videofilters/gstvideofiltersbad.c @@ -0,0 +1,43 @@ +/* GStreamer + * Copyright (C) 2011 David Schleef <ds@entropywave.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., 51 Franklin Street, Suite 500, + * Boston, MA 02110-1335, USA. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <gst/gst.h> +#include <gst/base/gstbasetransform.h> +#include "gstzebrastripe.h" + + +static gboolean +plugin_init (GstPlugin * plugin) +{ + + gst_element_register (plugin, "zebrastripe", GST_RANK_NONE, + gst_zebra_stripe_get_type ()); + + return TRUE; +} + +GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, + GST_VERSION_MINOR, + "videofiltersbad", + "Video filters in gst-plugins-bad", + plugin_init, VERSION, "LGPL", PACKAGE_NAME, GST_PACKAGE_ORIGIN) diff --git a/gst/videofilters/gstzebrastripe.c b/gst/videofilters/gstzebrastripe.c new file mode 100644 index 000000000..57134e975 --- /dev/null +++ b/gst/videofilters/gstzebrastripe.c @@ -0,0 +1,353 @@ +/* GStreamer + * Copyright (C) 2011 David Schleef <ds@entropywave.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., 51 Franklin Street, Suite 500, + * Boston, MA 02110-1335, USA. + */ +/** + * SECTION:element-gstzebrastripe + * + * The zebrastripe element marks areas of images in a video stream + * that are brighter than a threshold with a diagonal zebra stripe + * pattern. Typically, this is used to aid in adjusting the exposure + * setting on the camera. Setting the threshold to 95 or 100 will + * show areas that are completely overexposed and clipping. A + * threshold setting of 70 is often used to properly adjust skin + * tones. + * + * <refsect2> + * <title>Example launch line</title> + * |[ + * gst-launch -v videotestsrc ! zebrastripe ! xvimagesink + * ]| + * Marks overexposed areas of the video with zebra stripes. + * + * The threshold property is expressed as percentage of full scale, + * whereas common usage expresses thresholds in terms of IRE. The + * property setting can be calculated from IRE by using the formula + * percent = (IRE * 1.075) - 7.5. Note that 100 IRE corresponds to + * 100 %, and 70 IRE corresponds to 68 %. + * </refsect2> + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <gst/gst.h> +#include <gst/base/gstbasetransform.h> +#include <gst/video/video.h> +#include <math.h> +#include "gstzebrastripe.h" + +GST_DEBUG_CATEGORY_STATIC (gst_zebra_stripe_debug_category); +#define GST_CAT_DEFAULT gst_zebra_stripe_debug_category + +/* prototypes */ + + +static void gst_zebra_stripe_set_property (GObject * object, + guint property_id, const GValue * value, GParamSpec * pspec); +static void gst_zebra_stripe_get_property (GObject * object, + guint property_id, GValue * value, GParamSpec * pspec); +static void gst_zebra_stripe_dispose (GObject * object); +static void gst_zebra_stripe_finalize (GObject * object); + +static gboolean +gst_zebra_stripe_get_unit_size (GstBaseTransform * trans, GstCaps * caps, + guint * size); +static gboolean +gst_zebra_stripe_set_caps (GstBaseTransform * trans, GstCaps * incaps, + GstCaps * outcaps); +static gboolean gst_zebra_stripe_start (GstBaseTransform * trans); +static gboolean gst_zebra_stripe_stop (GstBaseTransform * trans); +static GstFlowReturn gst_zebra_stripe_transform_ip (GstBaseTransform * trans, + GstBuffer * buf); + +enum +{ + PROP_0, + PROP_THRESHOLD +}; + +#define DEFAULT_THRESHOLD 90 + +/* pad templates */ + +static GstStaticPadTemplate gst_zebra_stripe_sink_template = +GST_STATIC_PAD_TEMPLATE ("sink", + GST_PAD_SINK, + GST_PAD_ALWAYS, + GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV + ("{I420,YV12,Y41B,Y42B,NV12,NV21,YUV9,YVU9,Y444,UYVY,YVYU,YUY2,AYUV}")) + ); + +static GstStaticPadTemplate gst_zebra_stripe_src_template = +GST_STATIC_PAD_TEMPLATE ("src", + GST_PAD_SRC, + GST_PAD_ALWAYS, + GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV + ("{I420,YV12,Y41B,Y42B,NV12,NV21,YUV9,YVU9,Y444,UYVY,YVYU,YUY2,AYUV}")) + ); + + +/* class initialization */ + +#define DEBUG_INIT(bla) \ + GST_DEBUG_CATEGORY_INIT (gst_zebra_stripe_debug_category, "zebrastripe", 0, \ + "debug category for zebrastripe element"); + +GST_BOILERPLATE_FULL (GstZebraStripe, gst_zebra_stripe, GstBaseTransform, + GST_TYPE_BASE_TRANSFORM, DEBUG_INIT); + +static void +gst_zebra_stripe_base_init (gpointer g_class) +{ + GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); + + gst_element_class_add_pad_template (element_class, + gst_static_pad_template_get (&gst_zebra_stripe_sink_template)); + gst_element_class_add_pad_template (element_class, + gst_static_pad_template_get (&gst_zebra_stripe_src_template)); + + gst_element_class_set_details_simple (element_class, "Zebra stripe overlay", + "Filter/Analysis", + "Overlays zebra striping on overexposed areas of video", + "David Schleef <ds@entropywave.com>"); +} + +static void +gst_zebra_stripe_class_init (GstZebraStripeClass * klass) +{ + GObjectClass *gobject_class = G_OBJECT_CLASS (klass); + GstBaseTransformClass *base_transform_class = + GST_BASE_TRANSFORM_CLASS (klass); + + gobject_class->set_property = gst_zebra_stripe_set_property; + gobject_class->get_property = gst_zebra_stripe_get_property; + gobject_class->dispose = gst_zebra_stripe_dispose; + gobject_class->finalize = gst_zebra_stripe_finalize; + base_transform_class->get_unit_size = + GST_DEBUG_FUNCPTR (gst_zebra_stripe_get_unit_size); + base_transform_class->set_caps = + GST_DEBUG_FUNCPTR (gst_zebra_stripe_set_caps); + base_transform_class->start = GST_DEBUG_FUNCPTR (gst_zebra_stripe_start); + base_transform_class->stop = GST_DEBUG_FUNCPTR (gst_zebra_stripe_stop); + base_transform_class->transform_ip = + GST_DEBUG_FUNCPTR (gst_zebra_stripe_transform_ip); + + g_object_class_install_property (gobject_class, PROP_THRESHOLD, + g_param_spec_int ("threshold", "Threshold", + "Threshold above which the video is striped", 0, 100, + DEFAULT_THRESHOLD, + G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS)); + +} + +static void +gst_zebra_stripe_init (GstZebraStripe * zebrastripe, + GstZebraStripeClass * zebrastripe_class) +{ + + zebrastripe->sinkpad = + gst_pad_new_from_static_template (&gst_zebra_stripe_sink_template, + "sink"); + + zebrastripe->srcpad = + gst_pad_new_from_static_template (&gst_zebra_stripe_src_template, "src"); +} + +void +gst_zebra_stripe_set_property (GObject * object, guint property_id, + const GValue * value, GParamSpec * pspec) +{ + GstZebraStripe *zebrastripe; + + g_return_if_fail (GST_IS_ZEBRA_STRIPE (object)); + zebrastripe = GST_ZEBRA_STRIPE (object); + + switch (property_id) { + case PROP_THRESHOLD: + zebrastripe->threshold = g_value_get_int (value); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +void +gst_zebra_stripe_get_property (GObject * object, guint property_id, + GValue * value, GParamSpec * pspec) +{ + GstZebraStripe *zebrastripe; + + g_return_if_fail (GST_IS_ZEBRA_STRIPE (object)); + zebrastripe = GST_ZEBRA_STRIPE (object); + + switch (property_id) { + case PROP_THRESHOLD: + g_value_set_int (value, zebrastripe->threshold); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +void +gst_zebra_stripe_dispose (GObject * object) +{ + GstZebraStripe *zebrastripe; + + g_return_if_fail (GST_IS_ZEBRA_STRIPE (object)); + zebrastripe = GST_ZEBRA_STRIPE (object); + + /* clean up as possible. may be called multiple times */ + + G_OBJECT_CLASS (parent_class)->dispose (object); +} + +void +gst_zebra_stripe_finalize (GObject * object) +{ + GstZebraStripe *zebrastripe; + + g_return_if_fail (GST_IS_ZEBRA_STRIPE (object)); + zebrastripe = GST_ZEBRA_STRIPE (object); + + /* clean up object here */ + + G_OBJECT_CLASS (parent_class)->finalize (object); +} + + +static gboolean +gst_zebra_stripe_get_unit_size (GstBaseTransform * trans, GstCaps * caps, + guint * size) +{ + int width, height; + GstVideoFormat format; + gboolean ret; + + ret = gst_video_format_parse_caps (caps, &format, &width, &height); + *size = gst_video_format_get_size (format, width, height); + + return ret; +} + +static gboolean +gst_zebra_stripe_set_caps (GstBaseTransform * trans, GstCaps * incaps, + GstCaps * outcaps) +{ + GstZebraStripe *zebrastripe = GST_ZEBRA_STRIPE (trans); + int width, height; + GstVideoFormat format; + gboolean ret; + + ret = gst_video_format_parse_caps (incaps, &format, &width, &height); + if (ret) { + zebrastripe->format = format; + zebrastripe->width = width; + zebrastripe->height = height; + } + + return ret; +} + +static gboolean +gst_zebra_stripe_start (GstBaseTransform * trans) +{ + + return TRUE; +} + +static gboolean +gst_zebra_stripe_stop (GstBaseTransform * trans) +{ + + return TRUE; +} + +static GstFlowReturn +gst_zebra_stripe_transform_ip (GstBaseTransform * trans, GstBuffer * buf) +{ + GstZebraStripe *zebrastripe = GST_ZEBRA_STRIPE (trans); + int i, j; + int threshold; + int t; + guint8 *ydata; + int ystride; + + threshold = 16 + floor (0.5 + 2.19 * zebrastripe->threshold); + t = zebrastripe->t; + + ydata = GST_BUFFER_DATA (buf); + ystride = gst_video_format_get_row_stride (zebrastripe->format, + 0, zebrastripe->width); + switch (zebrastripe->format) { + case GST_VIDEO_FORMAT_I420: + case GST_VIDEO_FORMAT_YV12: + case GST_VIDEO_FORMAT_Y41B: + case GST_VIDEO_FORMAT_Y42B: + case GST_VIDEO_FORMAT_NV12: + case GST_VIDEO_FORMAT_NV21: + case GST_VIDEO_FORMAT_YUV9: + case GST_VIDEO_FORMAT_YVU9: + case GST_VIDEO_FORMAT_Y444: + for (j = 0; j < zebrastripe->height; j++) { + guint8 *data = ydata + ystride * j; + for (i = 0; i < zebrastripe->width; i++) { + if (data[i] >= threshold) { + if ((i + j + t) & 0x4) + data[i] = 16; + } + } + } + break; + case GST_VIDEO_FORMAT_UYVY: + ydata++; + case GST_VIDEO_FORMAT_YUY2: + case GST_VIDEO_FORMAT_YVYU: + for (j = 0; j < zebrastripe->height; j++) { + guint8 *data = ydata + ystride * j; + for (i = 0; i < zebrastripe->width; i++) { + if (data[2 * i] >= threshold) { + if ((i + j + t) & 0x4) + data[2 * i] = 16; + } + } + } + break; + case GST_VIDEO_FORMAT_AYUV: + ydata++; + for (j = 0; j < zebrastripe->height; j++) { + guint8 *data = ydata + ystride * j; + for (i = 0; i < zebrastripe->width; i++) { + if (data[4 * i] >= threshold) { + if ((i + j + t) & 0x4) + data[4 * i] = 16; + } + } + } + break; + default: + g_assert_not_reached (); + } + + zebrastripe->t++; + + return GST_FLOW_OK; +} diff --git a/gst/videofilters/gstzebrastripe.h b/gst/videofilters/gstzebrastripe.h new file mode 100644 index 000000000..41a7f170e --- /dev/null +++ b/gst/videofilters/gstzebrastripe.h @@ -0,0 +1,64 @@ +/* GStreamer + * Copyright (C) 2011 FIXME <fixme@example.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_ZEBRA_STRIPE_H_ +#define _GST_ZEBRA_STRIPE_H_ + +#include <gst/base/gstbasetransform.h> +#include <gst/video/video.h> + +G_BEGIN_DECLS + +#define GST_TYPE_ZEBRA_STRIPE (gst_zebra_stripe_get_type()) +#define GST_ZEBRA_STRIPE(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ZEBRA_STRIPE,GstZebraStripe)) +#define GST_ZEBRA_STRIPE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ZEBRA_STRIPE,GstZebraStripeClass)) +#define GST_IS_ZEBRA_STRIPE(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ZEBRA_STRIPE)) +#define GST_IS_ZEBRA_STRIPE_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ZEBRA_STRIPE)) + +typedef struct _GstZebraStripe GstZebraStripe; +typedef struct _GstZebraStripeClass GstZebraStripeClass; + +struct _GstZebraStripe +{ + GstBaseTransform base_zebrastripe; + + GstPad *sinkpad; + GstPad *srcpad; + + /* properties */ + int threshold; + + /* state */ + GstVideoFormat format; + int width; + int height; + int t; + +}; + +struct _GstZebraStripeClass +{ + GstBaseTransformClass base_zebrastripe_class; +}; + +GType gst_zebra_stripe_get_type (void); + +G_END_DECLS + +#endif |