/* GStreamer * Copyright (C) <2007> Wim Taymans * * 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-simplevideomark * @see_also: #GstVideoDetect * * This plugin produces #GstSimpleVideoMark::pattern-count squares in the bottom left * corner of the video frames. The squares have a width and height of * respectively #GstSimpleVideoMark:pattern-width and #GstSimpleVideoMark:pattern-height. * Even squares will be black and odd squares will be white. * * After writing the pattern, #GstSimpleVideoMark:pattern-data-count squares after the * pattern squares are produced as the bitarray given in * #GstSimpleVideoMark:pattern-data. 1 bits will produce white squares and 0 bits will * produce black squares. * * The element can be enabled with the #GstSimpleVideoMark:enabled property. It is * mostly used together with the #GstVideoDetect plugin. * * * Example launch line * |[ * gst-launch videotestsrc ! simplevideomark ! ximagesink * ]| Add the default black/white squares at the bottom left of the video frames. * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include "gstsimplevideomark.h" GST_DEBUG_CATEGORY_STATIC (gst_video_mark_debug_category); #define GST_CAT_DEFAULT gst_video_mark_debug_category /* prototypes */ static void gst_video_mark_set_property (GObject * object, guint property_id, const GValue * value, GParamSpec * pspec); static void gst_video_mark_get_property (GObject * object, guint property_id, GValue * value, GParamSpec * pspec); static void gst_video_mark_dispose (GObject * object); static void gst_video_mark_finalize (GObject * object); static gboolean gst_video_mark_start (GstBaseTransform * trans); static gboolean gst_video_mark_stop (GstBaseTransform * trans); static gboolean gst_video_mark_set_info (GstVideoFilter * filter, GstCaps * incaps, GstVideoInfo * in_info, GstCaps * outcaps, GstVideoInfo * out_info); static GstFlowReturn gst_video_mark_transform_frame_ip (GstVideoFilter * filter, GstVideoFrame * frame); enum { PROP_0, PROP_PATTERN_WIDTH, PROP_PATTERN_HEIGHT, PROP_PATTERN_COUNT, PROP_PATTERN_DATA_COUNT, PROP_PATTERN_DATA, PROP_ENABLED, PROP_LEFT_OFFSET, PROP_BOTTOM_OFFSET }; #define DEFAULT_PATTERN_WIDTH 4 #define DEFAULT_PATTERN_HEIGHT 16 #define DEFAULT_PATTERN_COUNT 4 #define DEFAULT_PATTERN_DATA_COUNT 5 #define DEFAULT_PATTERN_DATA 10 #define DEFAULT_ENABLED TRUE #define DEFAULT_LEFT_OFFSET 0 #define DEFAULT_BOTTOM_OFFSET 0 /* pad templates */ #define VIDEO_CAPS \ GST_VIDEO_CAPS_MAKE( \ "{ I420, YV12, Y41B, Y42B, Y444, YUY2, UYVY, AYUV, YVYU }") /* class initialization */ G_DEFINE_TYPE_WITH_CODE (GstSimpleVideoMark, gst_video_mark, GST_TYPE_VIDEO_FILTER, GST_DEBUG_CATEGORY_INIT (gst_video_mark_debug_category, "simplevideomark", 0, "debug category for simplevideomark element")); static void gst_video_mark_class_init (GstSimpleVideoMarkClass * klass) { GObjectClass *gobject_class = G_OBJECT_CLASS (klass); GstBaseTransformClass *base_transform_class = GST_BASE_TRANSFORM_CLASS (klass); GstVideoFilterClass *video_filter_class = GST_VIDEO_FILTER_CLASS (klass); gst_element_class_add_pad_template (GST_ELEMENT_CLASS (klass), gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS, gst_caps_from_string (VIDEO_CAPS))); gst_element_class_add_pad_template (GST_ELEMENT_CLASS (klass), gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, gst_caps_from_string (VIDEO_CAPS))); gst_element_class_set_static_metadata (GST_ELEMENT_CLASS (klass), "Video marker", "Filter/Effect/Video", "Marks a video signal with a pattern", "Wim Taymans "); gobject_class->set_property = gst_video_mark_set_property; gobject_class->get_property = gst_video_mark_get_property; gobject_class->dispose = gst_video_mark_dispose; gobject_class->finalize = gst_video_mark_finalize; base_transform_class->start = GST_DEBUG_FUNCPTR (gst_video_mark_start); base_transform_class->stop = GST_DEBUG_FUNCPTR (gst_video_mark_stop); video_filter_class->set_info = GST_DEBUG_FUNCPTR (gst_video_mark_set_info); video_filter_class->transform_frame_ip = GST_DEBUG_FUNCPTR (gst_video_mark_transform_frame_ip); g_object_class_install_property (gobject_class, PROP_PATTERN_WIDTH, g_param_spec_int ("pattern-width", "Pattern width", "The width of the pattern markers", 1, G_MAXINT, DEFAULT_PATTERN_WIDTH, G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_PATTERN_HEIGHT, g_param_spec_int ("pattern-height", "Pattern height", "The height of the pattern markers", 1, G_MAXINT, DEFAULT_PATTERN_HEIGHT, G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_PATTERN_COUNT, g_param_spec_int ("pattern-count", "Pattern count", "The number of pattern markers", 0, G_MAXINT, DEFAULT_PATTERN_COUNT, G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_PATTERN_DATA_COUNT, g_param_spec_int ("pattern-data-count", "Pattern data count", "The number of extra data pattern markers", 0, 64, DEFAULT_PATTERN_DATA_COUNT, G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_PATTERN_DATA, g_param_spec_uint64 ("pattern-data", "Pattern data", "The extra data pattern markers", 0, G_MAXUINT64, DEFAULT_PATTERN_DATA, G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_ENABLED, g_param_spec_boolean ("enabled", "Enabled", "Enable or disable the filter", DEFAULT_ENABLED, G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_LEFT_OFFSET, g_param_spec_int ("left-offset", "Left Offset", "The offset from the left border where the pattern starts", 0, G_MAXINT, DEFAULT_LEFT_OFFSET, G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_BOTTOM_OFFSET, g_param_spec_int ("bottom-offset", "Bottom Offset", "The offset from the bottom border where the pattern starts", 0, G_MAXINT, DEFAULT_BOTTOM_OFFSET, G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS)); } static void gst_video_mark_init (GstSimpleVideoMark * simplevideomark) { } void gst_video_mark_set_property (GObject * object, guint property_id, const GValue * value, GParamSpec * pspec) { GstSimpleVideoMark *simplevideomark = GST_SIMPLE_VIDEO_MARK (object); GST_DEBUG_OBJECT (simplevideomark, "set_property"); switch (property_id) { case PROP_PATTERN_WIDTH: simplevideomark->pattern_width = g_value_get_int (value); break; case PROP_PATTERN_HEIGHT: simplevideomark->pattern_height = g_value_get_int (value); break; case PROP_PATTERN_COUNT: simplevideomark->pattern_count = g_value_get_int (value); break; case PROP_PATTERN_DATA_COUNT: simplevideomark->pattern_data_count = g_value_get_int (value); break; case PROP_PATTERN_DATA: simplevideomark->pattern_data = g_value_get_uint64 (value); break; case PROP_ENABLED: simplevideomark->enabled = g_value_get_boolean (value); break; case PROP_LEFT_OFFSET: simplevideomark->left_offset = g_value_get_int (value); break; case PROP_BOTTOM_OFFSET: simplevideomark->bottom_offset = g_value_get_int (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); break; } } void gst_video_mark_get_property (GObject * object, guint property_id, GValue * value, GParamSpec * pspec) { GstSimpleVideoMark *simplevideomark = GST_SIMPLE_VIDEO_MARK (object); GST_DEBUG_OBJECT (simplevideomark, "get_property"); switch (property_id) { case PROP_PATTERN_WIDTH: g_value_set_int (value, simplevideomark->pattern_width); break; case PROP_PATTERN_HEIGHT: g_value_set_int (value, simplevideomark->pattern_height); break; case PROP_PATTERN_COUNT: g_value_set_int (value, simplevideomark->pattern_count); break; case PROP_PATTERN_DATA_COUNT: g_value_set_int (value, simplevideomark->pattern_data_count); break; case PROP_PATTERN_DATA: g_value_set_uint64 (value, simplevideomark->pattern_data); break; case PROP_ENABLED: g_value_set_boolean (value, simplevideomark->enabled); break; case PROP_LEFT_OFFSET: g_value_set_int (value, simplevideomark->left_offset); break; case PROP_BOTTOM_OFFSET: g_value_set_int (value, simplevideomark->bottom_offset); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); break; } } void gst_video_mark_dispose (GObject * object) { GstSimpleVideoMark *simplevideomark = GST_SIMPLE_VIDEO_MARK (object); GST_DEBUG_OBJECT (simplevideomark, "dispose"); /* clean up as possible. may be called multiple times */ G_OBJECT_CLASS (gst_video_mark_parent_class)->dispose (object); } void gst_video_mark_finalize (GObject * object) { GstSimpleVideoMark *simplevideomark = GST_SIMPLE_VIDEO_MARK (object); GST_DEBUG_OBJECT (simplevideomark, "finalize"); /* clean up object here */ G_OBJECT_CLASS (gst_video_mark_parent_class)->finalize (object); } static gboolean gst_video_mark_start (GstBaseTransform * trans) { GstSimpleVideoMark *simplevideomark = GST_SIMPLE_VIDEO_MARK (trans); GST_DEBUG_OBJECT (simplevideomark, "start"); return TRUE; } static gboolean gst_video_mark_stop (GstBaseTransform * trans) { GstSimpleVideoMark *simplevideomark = GST_SIMPLE_VIDEO_MARK (trans); GST_DEBUG_OBJECT (simplevideomark, "stop"); return TRUE; } static gboolean gst_video_mark_set_info (GstVideoFilter * filter, GstCaps * incaps, GstVideoInfo * in_info, GstCaps * outcaps, GstVideoInfo * out_info) { GstSimpleVideoMark *simplevideomark = GST_SIMPLE_VIDEO_MARK (filter); GST_DEBUG_OBJECT (simplevideomark, "set_info"); return TRUE; } static void gst_video_mark_draw_box (GstSimpleVideoMark * simplevideomark, guint8 * data, gint width, gint height, gint row_stride, gint pixel_stride, guint8 color) { gint i, j; for (i = 0; i < height; i++) { for (j = 0; j < width; j++) { data[pixel_stride * j] = color; } data += row_stride; } } static gint calculate_pw (gint pw, gint x, gint width) { if (x < 0) pw += x; else if ((x + pw) > width) pw = width - x; return pw; } static GstFlowReturn gst_video_mark_yuv (GstSimpleVideoMark * simplevideomark, GstVideoFrame * frame) { gint i, pw, ph, row_stride, pixel_stride; gint width, height, offset_calc, x, y; guint8 *d; guint64 pattern_shift; guint8 color; gint total_pattern; width = frame->info.width; height = frame->info.height; pw = simplevideomark->pattern_width; ph = simplevideomark->pattern_height; row_stride = GST_VIDEO_FRAME_COMP_STRIDE (frame, 0); pixel_stride = GST_VIDEO_FRAME_COMP_PSTRIDE (frame, 0); d = GST_VIDEO_FRAME_COMP_DATA (frame, 0); offset_calc = row_stride * (height - ph - simplevideomark->bottom_offset) + pixel_stride * simplevideomark->left_offset; x = simplevideomark->left_offset; y = height - ph - simplevideomark->bottom_offset; total_pattern = simplevideomark->pattern_count + simplevideomark->pattern_data_count; /* If x and y offset values are outside the video, no need to draw */ if ((x + (pw * total_pattern)) < 0 || x > width || (y + height) < 0 || y > height) return GST_FLOW_OK; /* Offset calculation less than 0, then reset to 0 */ if (offset_calc < 0) offset_calc = 0; /* Y position of mark is negative or pattern exceeds the video height, then recalculate pattern height for partial display */ if (y < 0) ph += y; else if ((y + ph) > height) ph = height - y; /* If pattern height is less than 0, need not draw anything */ if (ph < 0) return GST_FLOW_OK; /* move to start of bottom left */ d += offset_calc; /* draw the bottom left pixels */ for (i = 0; i < simplevideomark->pattern_count; i++) { gint draw_pw; if (i & 1) /* odd pixels must be white */ color = 255; else color = 0; /* X position of mark is negative or pattern exceeds the video width, then recalculate pattern width for partial display */ draw_pw = calculate_pw (pw, x, width); /* If pattern width is less than 0, continue with the next pattern */ if (draw_pw < 0) continue; /* draw box of width * height */ gst_video_mark_draw_box (simplevideomark, d, draw_pw, ph, row_stride, pixel_stride, color); /* move to i-th pattern */ d += pixel_stride * draw_pw; x += draw_pw; if ((x + (pw * (total_pattern - i - 1))) < 0 || x >= width) return GST_FLOW_OK; } pattern_shift = G_GUINT64_CONSTANT (1) << (simplevideomark->pattern_data_count - 1); /* get the data of the pattern */ for (i = 0; i < simplevideomark->pattern_data_count; i++) { gint draw_pw; if (simplevideomark->pattern_data & pattern_shift) color = 255; else color = 0; /* X position of mark is negative or pattern exceeds the video width, then recalculate pattern width for partial display */ draw_pw = calculate_pw (pw, x, width); /* If pattern width is less than 0, continue with the next pattern */ if (draw_pw < 0) continue; gst_video_mark_draw_box (simplevideomark, d, draw_pw, ph, row_stride, pixel_stride, color); pattern_shift >>= 1; /* move to i-th pattern data */ d += pixel_stride * draw_pw; x += draw_pw; if ((x + (pw * (simplevideomark->pattern_data_count - i - 1))) < 0 || x >= width) return GST_FLOW_OK; } return GST_FLOW_OK; } static GstFlowReturn gst_video_mark_transform_frame_ip (GstVideoFilter * filter, GstVideoFrame * frame) { GstSimpleVideoMark *simplevideomark = GST_SIMPLE_VIDEO_MARK (filter); GST_DEBUG_OBJECT (simplevideomark, "transform_frame_ip"); if (simplevideomark->enabled) return gst_video_mark_yuv (simplevideomark, frame); return GST_FLOW_OK; }