/* GStreamer * Copyright (C) <1999> Erik Walthinsen * * EffecTV: * Copyright (C) 2001 FUKUCHI Kentarou * * 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., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /** * SECTION:element-vertigotv * * VertigoTV is a loopback alpha blending effector with rotating and scaling. * * * Example launch line * |[ * gst-launch -v videotestsrc ! vertigotv ! ffmpegcolorspace ! autovideosink * ]| This pipeline shows the effect of vertigotv on a test stream. * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include "gstvertigo.h" #include #include GST_BOILERPLATE (GstVertigoTV, gst_vertigotv, GstVideoFilter, GST_TYPE_VIDEO_FILTER); /* Filter signals and args */ enum { PROP_0, PROP_SPEED, PROP_ZOOM_SPEED }; #if G_BYTE_ORDER == G_LITTLE_ENDIAN #define CAPS_STR GST_VIDEO_CAPS_RGBx ";" GST_VIDEO_CAPS_BGRx #else #define CAPS_STR GST_VIDEO_CAPS_xRGB ";" GST_VIDEO_CAPS_xBGR #endif static GstStaticPadTemplate gst_vertigotv_src_template = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS (CAPS_STR) ); static GstStaticPadTemplate gst_vertigotv_sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS (CAPS_STR) ); static gboolean gst_vertigotv_set_caps (GstBaseTransform * btrans, GstCaps * incaps, GstCaps * outcaps) { GstVertigoTV *filter = GST_VERTIGOTV (btrans); GstStructure *structure; gboolean ret = FALSE; structure = gst_caps_get_structure (incaps, 0); GST_OBJECT_LOCK (filter); if (gst_structure_get_int (structure, "width", &filter->width) && gst_structure_get_int (structure, "height", &filter->height)) { gint area = filter->width * filter->height; g_free (filter->buffer); filter->buffer = (guint32 *) g_malloc0 (area * 2 * sizeof (guint32)); filter->current_buffer = filter->buffer; filter->alt_buffer = filter->buffer + area; filter->phase = 0; ret = TRUE; } GST_OBJECT_UNLOCK (filter); return ret; } static void gst_vertigotv_set_parms (GstVertigoTV * filter) { double vx, vy; double t; double x, y; double dizz; dizz = sin (filter->phase) * 10 + sin (filter->phase * 1.9 + 5) * 5; x = filter->width / 2; y = filter->height / 2; t = (x * x + y * y) * filter->zoomrate; if (filter->width > filter->height) { if (dizz >= 0) { if (dizz > x) dizz = x; vx = (x * (x - dizz) + y * y) / t; } else { if (dizz < -x) dizz = -x; vx = (x * (x + dizz) + y * y) / t; } vy = (dizz * y) / t; } else { if (dizz >= 0) { if (dizz > y) dizz = y; vx = (x * x + y * (y - dizz)) / t; } else { if (dizz < -y) dizz = -y; vx = (x * x + y * (y + dizz)) / t; } vy = (dizz * x) / t; } filter->dx = vx * 65536; filter->dy = vy * 65536; filter->sx = (-vx * x + vy * y + x + cos (filter->phase * 5) * 2) * 65536; filter->sy = (-vx * y - vy * x + y + sin (filter->phase * 6) * 2) * 65536; filter->phase += filter->phase_increment; if (filter->phase > 5700000) filter->phase = 0; } static GstFlowReturn gst_vertigotv_transform (GstBaseTransform * trans, GstBuffer * in, GstBuffer * out) { GstVertigoTV *filter = GST_VERTIGOTV (trans); guint32 *src, *dest, *p; guint32 v; gint x, y, ox, oy, i, width, height, area; GstFlowReturn ret = GST_FLOW_OK; GstClockTime timestamp, stream_time; timestamp = GST_BUFFER_TIMESTAMP (in); stream_time = gst_segment_to_stream_time (&trans->segment, GST_FORMAT_TIME, timestamp); GST_DEBUG_OBJECT (filter, "sync to %" GST_TIME_FORMAT, GST_TIME_ARGS (timestamp)); if (GST_CLOCK_TIME_IS_VALID (stream_time)) gst_object_sync_values (G_OBJECT (filter), stream_time); src = (guint32 *) GST_BUFFER_DATA (in); dest = (guint32 *) GST_BUFFER_DATA (out); GST_OBJECT_LOCK (filter); width = filter->width; height = filter->height; area = width * height; gst_vertigotv_set_parms (filter); p = filter->alt_buffer; for (y = height; y > 0; y--) { ox = filter->sx; oy = filter->sy; for (x = width; x > 0; x--) { i = (oy >> 16) * width + (ox >> 16); if (i < 0) i = 0; if (i >= area) i = area; v = filter->current_buffer[i] & 0xfcfcff; v = (v * 3) + ((*src++) & 0xfcfcff); *p++ = (v >> 2); ox += filter->dx; oy += filter->dy; } filter->sx -= filter->dy; filter->sy += filter->dx; } memcpy (dest, filter->alt_buffer, area * sizeof (guint32)); p = filter->current_buffer; filter->current_buffer = filter->alt_buffer; filter->alt_buffer = p; GST_OBJECT_UNLOCK (filter); return ret; } static gboolean gst_vertigotv_start (GstBaseTransform * trans) { GstVertigoTV *filter = GST_VERTIGOTV (trans); filter->phase = 0.0; return TRUE; } static void gst_vertigotv_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstVertigoTV *filter = GST_VERTIGOTV (object); GST_OBJECT_LOCK (filter); switch (prop_id) { case PROP_SPEED: filter->phase_increment = g_value_get_float (value); break; case PROP_ZOOM_SPEED: filter->zoomrate = g_value_get_float (value); break; default: break; } GST_OBJECT_UNLOCK (filter); } static void gst_vertigotv_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstVertigoTV *filter = GST_VERTIGOTV (object); switch (prop_id) { case PROP_SPEED: g_value_set_float (value, filter->phase_increment); break; case PROP_ZOOM_SPEED: g_value_set_float (value, filter->zoomrate); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_vertigotv_finalize (GObject * object) { GstVertigoTV *filter = GST_VERTIGOTV (object); g_free (filter->buffer); filter->buffer = NULL; G_OBJECT_CLASS (parent_class)->finalize (object); } static void gst_vertigotv_base_init (gpointer g_class) { GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); gst_element_class_set_details_simple (element_class, "VertigoTV effect", "Filter/Effect/Video", "A loopback alpha blending effector with rotating and scaling", "Wim Taymans "); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&gst_vertigotv_sink_template)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&gst_vertigotv_src_template)); } static void gst_vertigotv_class_init (GstVertigoTVClass * klass) { GObjectClass *gobject_class = (GObjectClass *) klass; GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass; gobject_class->set_property = gst_vertigotv_set_property; gobject_class->get_property = gst_vertigotv_get_property; gobject_class->finalize = gst_vertigotv_finalize; g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SPEED, g_param_spec_float ("speed", "Speed", "Control the speed of movement", 0.01, 100.0, 0.02, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_ZOOM_SPEED, g_param_spec_float ("zoom-speed", "Zoom Speed", "Control the rate of zooming", 1.01, 1.1, 1.01, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); trans_class->start = GST_DEBUG_FUNCPTR (gst_vertigotv_start); trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_vertigotv_set_caps); trans_class->transform = GST_DEBUG_FUNCPTR (gst_vertigotv_transform); } static void gst_vertigotv_init (GstVertigoTV * filter, GstVertigoTVClass * klass) { filter->buffer = NULL; filter->phase = 0.0; filter->phase_increment = 0.02; filter->zoomrate = 1.01; }