mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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258 lines
7.1 KiB
C
258 lines
7.1 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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*
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* EffecTV:
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* Copyright (C) 2001 FUKUCHI Kentarou
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*
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* Inspired by Adrian Likin's script for the GIMP.
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* EffecTV is free software. This library is free software;
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* you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-shagadelictv
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*
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* Oh behave, ShagedelicTV makes images shagadelic!
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*
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* <refsect2>
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* <title>Example launch line</title>
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* |[
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* gst-launch -v videotestsrc ! shagadelictv ! videoconvert ! autovideosink
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* ]| This pipeline shows the effect of shagadelictv on a test stream.
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* </refsect2>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <math.h>
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#include <string.h>
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#include "gstshagadelic.h"
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#include "gsteffectv.h"
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#ifndef M_PI
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#define M_PI 3.14159265358979323846
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#endif
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#define gst_shagadelictv_parent_class parent_class
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G_DEFINE_TYPE (GstShagadelicTV, gst_shagadelictv, GST_TYPE_VIDEO_FILTER);
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static void gst_shagadelic_initialize (GstShagadelicTV * filter,
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GstVideoInfo * in_info);
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#if G_BYTE_ORDER == G_LITTLE_ENDIAN
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#define CAPS_STR GST_VIDEO_CAPS_MAKE ("BGRx")
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#else
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#define CAPS_STR GST_VIDEO_CAPS_MAKE ("xRGB")
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#endif
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static GstStaticPadTemplate gst_shagadelictv_src_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (CAPS_STR)
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);
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static GstStaticPadTemplate gst_shagadelictv_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (CAPS_STR)
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);
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static gboolean
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gst_shagadelictv_set_info (GstVideoFilter * vfilter, GstCaps * incaps,
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GstVideoInfo * in_info, GstCaps * outcaps, GstVideoInfo * out_info)
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{
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GstShagadelicTV *filter = GST_SHAGADELICTV (vfilter);
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gint width, height, area;
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width = GST_VIDEO_INFO_WIDTH (in_info);
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height = GST_VIDEO_INFO_HEIGHT (in_info);
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area = width * height;
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g_free (filter->ripple);
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g_free (filter->spiral);
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filter->ripple = (guint8 *) g_malloc (area * 4);
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filter->spiral = (guint8 *) g_malloc (area);
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gst_shagadelic_initialize (filter, in_info);
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return TRUE;
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}
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static void
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gst_shagadelic_initialize (GstShagadelicTV * filter, GstVideoInfo * info)
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{
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int i, x, y;
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#ifdef PS2
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float xx, yy;
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#else
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double xx, yy;
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#endif
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gint width, height;
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width = GST_VIDEO_INFO_WIDTH (info);
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height = GST_VIDEO_INFO_HEIGHT (info);
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i = 0;
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for (y = 0; y < height * 2; y++) {
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yy = y - height;
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yy *= yy;
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for (x = 0; x < width * 2; x++) {
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xx = x - width;
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#ifdef PS2
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filter->ripple[i++] = ((unsigned int) (sqrtf (xx * xx + yy) * 8)) & 255;
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#else
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filter->ripple[i++] = ((unsigned int) (sqrt (xx * xx + yy) * 8)) & 255;
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#endif
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}
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}
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i = 0;
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for (y = 0; y < height; y++) {
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yy = y - height / 2;
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for (x = 0; x < width; x++) {
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xx = x - width / 2;
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#ifdef PS2
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filter->spiral[i++] = ((unsigned int)
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((atan2f (xx,
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yy) / ((float) M_PI) * 256 * 9) + (sqrtf (xx * xx +
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yy * yy) * 5))) & 255;
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#else
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filter->spiral[i++] = ((unsigned int)
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((atan2 (xx, yy) / M_PI * 256 * 9) + (sqrt (xx * xx +
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yy * yy) * 5))) & 255;
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#endif
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/* Here is another Swinger!
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* ((atan2(xx, yy)/M_PI*256) + (sqrt(xx*xx+yy*yy)*10))&255;
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*/
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}
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}
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filter->rx = fastrand () % width;
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filter->ry = fastrand () % height;
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filter->bx = fastrand () % width;
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filter->by = fastrand () % height;
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filter->rvx = -2;
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filter->rvy = -2;
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filter->bvx = 2;
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filter->bvy = 2;
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filter->phase = 0;
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}
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static GstFlowReturn
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gst_shagadelictv_transform_frame (GstVideoFilter * vfilter,
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GstVideoFrame * in_frame, GstVideoFrame * out_frame)
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{
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GstShagadelicTV *filter = GST_SHAGADELICTV (vfilter);
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guint32 *src, *dest;
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gint x, y;
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guint32 v;
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guint8 r, g, b;
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gint width, height;
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src = GST_VIDEO_FRAME_PLANE_DATA (in_frame, 0);
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dest = GST_VIDEO_FRAME_PLANE_DATA (out_frame, 0);
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width = GST_VIDEO_FRAME_WIDTH (in_frame);
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height = GST_VIDEO_FRAME_HEIGHT (in_frame);
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for (y = 0; y < height; y++) {
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for (x = 0; x < width; x++) {
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v = *src++ | 0x1010100;
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v = (v - 0x707060) & 0x1010100;
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v -= v >> 8;
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/* Try another Babe!
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* v = *src++;
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* *dest++ = v & ((r<<16)|(g<<8)|b);
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*/
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r = ((gint8) (filter->ripple[(filter->ry + y) * width * 2 + filter->rx +
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x] + filter->phase * 2)) >> 7;
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g = ((gint8) (filter->spiral[y * width + x] + filter->phase * 3)) >> 7;
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b = ((gint8) (filter->ripple[(filter->by + y) * width * 2 + filter->bx +
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x] - filter->phase)) >> 7;
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*dest++ = v & ((r << 16) | (g << 8) | b);
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}
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}
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filter->phase -= 8;
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if ((filter->rx + filter->rvx) < 0 || (filter->rx + filter->rvx) >= width)
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filter->rvx = -filter->rvx;
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if ((filter->ry + filter->rvy) < 0 || (filter->ry + filter->rvy) >= height)
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filter->rvy = -filter->rvy;
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if ((filter->bx + filter->bvx) < 0 || (filter->bx + filter->bvx) >= width)
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filter->bvx = -filter->bvx;
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if ((filter->by + filter->bvy) < 0 || (filter->by + filter->bvy) >= height)
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filter->bvy = -filter->bvy;
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filter->rx += filter->rvx;
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filter->ry += filter->rvy;
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filter->bx += filter->bvx;
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filter->by += filter->bvy;
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return GST_FLOW_OK;
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}
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static void
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gst_shagadelictv_finalize (GObject * object)
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{
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GstShagadelicTV *filter = GST_SHAGADELICTV (object);
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if (filter->ripple)
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g_free (filter->ripple);
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filter->ripple = NULL;
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if (filter->spiral)
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g_free (filter->spiral);
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filter->spiral = NULL;
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gst_shagadelictv_class_init (GstShagadelicTVClass * klass)
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{
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GObjectClass *gobject_class = (GObjectClass *) klass;
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GstElementClass *gstelement_class = (GstElementClass *) klass;
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GstVideoFilterClass *vfilter_class = (GstVideoFilterClass *) klass;
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gobject_class->finalize = gst_shagadelictv_finalize;
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gst_element_class_set_details_simple (gstelement_class, "ShagadelicTV",
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"Filter/Effect/Video",
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"Oh behave, ShagedelicTV makes images shagadelic!",
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"Wim Taymans <wim.taymans@chello.be>");
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&gst_shagadelictv_sink_template));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&gst_shagadelictv_src_template));
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vfilter_class->set_info = GST_DEBUG_FUNCPTR (gst_shagadelictv_set_info);
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vfilter_class->transform_frame =
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GST_DEBUG_FUNCPTR (gst_shagadelictv_transform_frame);
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}
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static void
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gst_shagadelictv_init (GstShagadelicTV * filter)
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{
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filter->ripple = NULL;
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filter->spiral = NULL;
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}
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