| /* GStreamer |
| * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> |
| * Copyright (C) <2009> Sebastian Dröge <sebastian.droege@collabora.co.uk> |
| * |
| * EffecTV: |
| * Copyright (C) 2001-2002 FUKUCHI Kentarou |
| * |
| * EdgeTV - detects edge and display it in good old computer way |
| * |
| * EffecTV is free software. 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 St, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| /** |
| * SECTION:element-edgetv |
| * |
| * EdgeTV detects edges and display it in good old low resolution |
| * computer way. |
| * |
| * <refsect2> |
| * <title>Example launch line</title> |
| * |[ |
| * gst-launch-1.0 -v videotestsrc ! edgetv ! videoconvert ! autovideosink |
| * ]| This pipeline shows the effect of edgetv on a test stream. |
| * </refsect2> |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <string.h> |
| |
| #include "gstedge.h" |
| |
| #define gst_edgetv_parent_class parent_class |
| G_DEFINE_TYPE (GstEdgeTV, gst_edgetv, GST_TYPE_VIDEO_FILTER); |
| |
| #if G_BYTE_ORDER == G_LITTLE_ENDIAN |
| #define CAPS_STR GST_VIDEO_CAPS_MAKE ("{ BGRx, RGBx }") |
| #else |
| #define CAPS_STR GST_VIDEO_CAPS_MAKE ("{ xBGR, xRGB }") |
| #endif |
| |
| static GstStaticPadTemplate gst_edgetv_src_template = |
| GST_STATIC_PAD_TEMPLATE ("src", |
| GST_PAD_SRC, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS (CAPS_STR) |
| ); |
| |
| static GstStaticPadTemplate gst_edgetv_sink_template = |
| GST_STATIC_PAD_TEMPLATE ("sink", |
| GST_PAD_SINK, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS (CAPS_STR) |
| ); |
| |
| static gboolean |
| gst_edgetv_set_info (GstVideoFilter * filter, GstCaps * incaps, |
| GstVideoInfo * in_info, GstCaps * outcaps, GstVideoInfo * out_info) |
| { |
| GstEdgeTV *edgetv = GST_EDGETV (filter); |
| guint map_size; |
| gint width, height; |
| |
| width = GST_VIDEO_INFO_WIDTH (in_info); |
| height = GST_VIDEO_INFO_HEIGHT (in_info); |
| |
| edgetv->map_width = width / 4; |
| edgetv->map_height = height / 4; |
| edgetv->video_width_margin = width % 4; |
| |
| map_size = edgetv->map_width * edgetv->map_height * sizeof (guint32) * 2; |
| |
| g_free (edgetv->map); |
| edgetv->map = (guint32 *) g_malloc0 (map_size); |
| |
| return TRUE; |
| } |
| |
| static GstFlowReturn |
| gst_edgetv_transform_frame (GstVideoFilter * vfilter, GstVideoFrame * in_frame, |
| GstVideoFrame * out_frame) |
| { |
| GstEdgeTV *filter = GST_EDGETV (vfilter); |
| gint x, y, r, g, b; |
| guint32 *src, *dest; |
| guint32 p, q; |
| guint32 v0, v1, v2, v3; |
| gint width, map_height, map_width; |
| gint video_width_margin; |
| guint32 *map; |
| GstFlowReturn ret = GST_FLOW_OK; |
| |
| map = filter->map; |
| map_height = filter->map_height; |
| map_width = filter->map_width; |
| video_width_margin = filter->video_width_margin; |
| |
| src = GST_VIDEO_FRAME_PLANE_DATA (in_frame, 0); |
| dest = GST_VIDEO_FRAME_PLANE_DATA (out_frame, 0); |
| |
| width = GST_VIDEO_FRAME_WIDTH (in_frame); |
| |
| src += width * 4 + 4; |
| dest += width * 4 + 4; |
| |
| for (y = 1; y < map_height - 1; y++) { |
| for (x = 1; x < map_width - 1; x++) { |
| p = *src; |
| q = *(src - 4); |
| |
| /* difference between the current pixel and left neighbor. */ |
| r = ((p & 0xff0000) - (q & 0xff0000)) >> 16; |
| g = ((p & 0xff00) - (q & 0xff00)) >> 8; |
| b = (p & 0xff) - (q & 0xff); |
| r *= r; |
| g *= g; |
| b *= b; |
| r = r >> 5; /* To lack the lower bit for saturated addition, */ |
| g = g >> 5; /* devide the value with 32, instead of 16. It is */ |
| b = b >> 4; /* same as `v2 &= 0xfefeff' */ |
| if (r > 127) |
| r = 127; |
| if (g > 127) |
| g = 127; |
| if (b > 255) |
| b = 255; |
| v2 = (r << 17) | (g << 9) | b; |
| |
| /* difference between the current pixel and upper neighbor. */ |
| q = *(src - width * 4); |
| r = ((p & 0xff0000) - (q & 0xff0000)) >> 16; |
| g = ((p & 0xff00) - (q & 0xff00)) >> 8; |
| b = (p & 0xff) - (q & 0xff); |
| r *= r; |
| g *= g; |
| b *= b; |
| r = r >> 5; |
| g = g >> 5; |
| b = b >> 4; |
| if (r > 127) |
| r = 127; |
| if (g > 127) |
| g = 127; |
| if (b > 255) |
| b = 255; |
| v3 = (r << 17) | (g << 9) | b; |
| |
| v0 = map[(y - 1) * map_width * 2 + x * 2]; |
| v1 = map[y * map_width * 2 + (x - 1) * 2 + 1]; |
| map[y * map_width * 2 + x * 2] = v2; |
| map[y * map_width * 2 + x * 2 + 1] = v3; |
| r = v0 + v1; |
| g = r & 0x01010100; |
| dest[0] = r | (g - (g >> 8)); |
| r = v0 + v3; |
| g = r & 0x01010100; |
| dest[1] = r | (g - (g >> 8)); |
| dest[2] = v3; |
| dest[3] = v3; |
| r = v2 + v1; |
| g = r & 0x01010100; |
| dest[width] = r | (g - (g >> 8)); |
| r = v2 + v3; |
| g = r & 0x01010100; |
| dest[width + 1] = r | (g - (g >> 8)); |
| dest[width + 2] = v3; |
| dest[width + 3] = v3; |
| dest[width * 2] = v2; |
| dest[width * 2 + 1] = v2; |
| dest[width * 2 + 2] = 0; |
| dest[width * 2 + 3] = 0; |
| dest[width * 3] = v2; |
| dest[width * 3 + 1] = v2; |
| dest[width * 3 + 2] = 0; |
| dest[width * 3 + 3] = 0; |
| |
| src += 4; |
| dest += 4; |
| } |
| src += width * 3 + 8 + video_width_margin; |
| dest += width * 3 + 8 + video_width_margin; |
| } |
| |
| return ret; |
| } |
| |
| static gboolean |
| gst_edgetv_start (GstBaseTransform * trans) |
| { |
| GstEdgeTV *edgetv = GST_EDGETV (trans); |
| |
| if (edgetv->map) |
| memset (edgetv->map, 0, |
| edgetv->map_width * edgetv->map_height * sizeof (guint32) * 2); |
| return TRUE; |
| } |
| |
| static void |
| gst_edgetv_finalize (GObject * object) |
| { |
| GstEdgeTV *edgetv = GST_EDGETV (object); |
| |
| g_free (edgetv->map); |
| edgetv->map = NULL; |
| |
| G_OBJECT_CLASS (parent_class)->finalize (object); |
| } |
| |
| static void |
| gst_edgetv_class_init (GstEdgeTVClass * klass) |
| { |
| GObjectClass *gobject_class = (GObjectClass *) klass; |
| GstElementClass *gstelement_class = (GstElementClass *) klass; |
| GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass; |
| GstVideoFilterClass *vfilter_class = (GstVideoFilterClass *) klass; |
| |
| gobject_class->finalize = gst_edgetv_finalize; |
| |
| gst_element_class_set_static_metadata (gstelement_class, "EdgeTV effect", |
| "Filter/Effect/Video", |
| "Apply edge detect on video", "Wim Taymans <wim.taymans@chello.be>"); |
| |
| gst_element_class_add_pad_template (gstelement_class, |
| gst_static_pad_template_get (&gst_edgetv_sink_template)); |
| gst_element_class_add_pad_template (gstelement_class, |
| gst_static_pad_template_get (&gst_edgetv_src_template)); |
| |
| trans_class->start = GST_DEBUG_FUNCPTR (gst_edgetv_start); |
| |
| vfilter_class->set_info = GST_DEBUG_FUNCPTR (gst_edgetv_set_info); |
| vfilter_class->transform_frame = |
| GST_DEBUG_FUNCPTR (gst_edgetv_transform_frame); |
| } |
| |
| static void |
| gst_edgetv_init (GstEdgeTV * edgetv) |
| { |
| } |