| /* GStreamer |
| * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> |
| * Copyright (C) <2009> Sebastian Dröge <sebastian.droege@collabora.co.uk> |
| * |
| * dice.c: a 'dicing' effect |
| * copyright (c) 2001 Sam Mertens. This code is subject to the provisions of |
| * the GNU Library Public License. |
| * |
| * I suppose this looks similar to PuzzleTV, but it's not. The screen is |
| * divided into small squares, each of which is rotated either 0, 90, 180 or |
| * 270 degrees. The amount of rotation for each square is chosen at random. |
| * |
| * 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-dicetv |
| * |
| * DiceTV 'dices' the screen up into many small squares, each defaulting |
| * to a size of 16 pixels by 16 pixels.. Each square is rotated randomly |
| * in one of four directions: up (no change), down (180 degrees, or |
| * upside down), right (90 degrees clockwise), or left (90 degrees |
| * counterclockwise). The direction of each square normally remains |
| * consistent between each frame. |
| * |
| * <refsect2> |
| * <title>Example launch line</title> |
| * |[ |
| * gst-launch-1.0 -v videotestsrc ! dicetv ! videoconvert ! autovideosink |
| * ]| This pipeline shows the effect of dicetv on a test stream. |
| * </refsect2> |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <string.h> |
| |
| #include "gstdice.h" |
| #include "gsteffectv.h" |
| |
| #define DEFAULT_CUBE_BITS 4 |
| #define MAX_CUBE_BITS 5 |
| #define MIN_CUBE_BITS 0 |
| |
| typedef enum _dice_dir |
| { |
| DICE_UP = 0, |
| DICE_RIGHT = 1, |
| DICE_DOWN = 2, |
| DICE_LEFT = 3 |
| } DiceDir; |
| |
| #define gst_dicetv_parent_class parent_class |
| G_DEFINE_TYPE (GstDiceTV, gst_dicetv, GST_TYPE_VIDEO_FILTER); |
| |
| static void gst_dicetv_create_map (GstDiceTV * filter, GstVideoInfo * info); |
| |
| static GstStaticPadTemplate gst_dicetv_src_template = |
| GST_STATIC_PAD_TEMPLATE ("src", |
| GST_PAD_SRC, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ RGBx, xRGB, BGRx, xBGR }")) |
| ); |
| |
| static GstStaticPadTemplate gst_dicetv_sink_template = |
| GST_STATIC_PAD_TEMPLATE ("sink", |
| GST_PAD_SINK, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ RGBx, xRGB, BGRx, xBGR }")) |
| ); |
| |
| enum |
| { |
| PROP_0, |
| PROP_CUBE_BITS |
| }; |
| |
| static gboolean |
| gst_dicetv_set_info (GstVideoFilter * vfilter, GstCaps * incaps, |
| GstVideoInfo * in_info, GstCaps * outcaps, GstVideoInfo * out_info) |
| { |
| GstDiceTV *filter = GST_DICETV (vfilter); |
| |
| g_free (filter->dicemap); |
| filter->dicemap = |
| (guint8 *) g_malloc (GST_VIDEO_INFO_WIDTH (in_info) * |
| GST_VIDEO_INFO_WIDTH (in_info)); |
| gst_dicetv_create_map (filter, in_info); |
| |
| return TRUE; |
| } |
| |
| static GstFlowReturn |
| gst_dicetv_transform_frame (GstVideoFilter * vfilter, GstVideoFrame * in_frame, |
| GstVideoFrame * out_frame) |
| { |
| GstDiceTV *filter = GST_DICETV (vfilter); |
| guint32 *src, *dest; |
| gint i, map_x, map_y, map_i, base, dx, dy, di; |
| gint video_stride, g_cube_bits, g_cube_size; |
| gint g_map_height, g_map_width; |
| GstClockTime timestamp, stream_time; |
| const guint8 *dicemap; |
| |
| timestamp = GST_BUFFER_TIMESTAMP (in_frame->buffer); |
| stream_time = |
| gst_segment_to_stream_time (&GST_BASE_TRANSFORM (vfilter)->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 (GST_OBJECT (filter), stream_time); |
| |
| src = (guint32 *) GST_VIDEO_FRAME_PLANE_DATA (in_frame, 0); |
| dest = (guint32 *) GST_VIDEO_FRAME_PLANE_DATA (out_frame, 0); |
| video_stride = GST_VIDEO_FRAME_PLANE_STRIDE (in_frame, 0); |
| |
| GST_OBJECT_LOCK (filter); |
| g_cube_bits = filter->g_cube_bits; |
| g_cube_size = filter->g_cube_size; |
| g_map_height = filter->g_map_height; |
| g_map_width = filter->g_map_width; |
| |
| dicemap = filter->dicemap; |
| video_stride /= 4; |
| |
| map_i = 0; |
| for (map_y = 0; map_y < g_map_height; map_y++) { |
| for (map_x = 0; map_x < g_map_width; map_x++) { |
| base = (map_y << g_cube_bits) * video_stride + (map_x << g_cube_bits); |
| |
| switch (dicemap[map_i]) { |
| case DICE_UP: |
| for (dy = 0; dy < g_cube_size; dy++) { |
| i = base + dy * video_stride; |
| for (dx = 0; dx < g_cube_size; dx++) { |
| dest[i] = src[i]; |
| i++; |
| } |
| } |
| break; |
| case DICE_LEFT: |
| for (dy = 0; dy < g_cube_size; dy++) { |
| i = base + dy * video_stride; |
| |
| for (dx = 0; dx < g_cube_size; dx++) { |
| di = base + (dx * video_stride) + (g_cube_size - dy - 1); |
| dest[di] = src[i]; |
| i++; |
| } |
| } |
| break; |
| case DICE_DOWN: |
| for (dy = 0; dy < g_cube_size; dy++) { |
| di = base + dy * video_stride; |
| i = base + (g_cube_size - dy - 1) * video_stride + g_cube_size; |
| for (dx = 0; dx < g_cube_size; dx++) { |
| i--; |
| dest[di] = src[i]; |
| di++; |
| } |
| } |
| break; |
| case DICE_RIGHT: |
| for (dy = 0; dy < g_cube_size; dy++) { |
| i = base + (dy * video_stride); |
| for (dx = 0; dx < g_cube_size; dx++) { |
| di = base + dy + (g_cube_size - dx - 1) * video_stride; |
| dest[di] = src[i]; |
| i++; |
| } |
| } |
| break; |
| default: |
| g_assert_not_reached (); |
| break; |
| } |
| map_i++; |
| } |
| } |
| GST_OBJECT_UNLOCK (filter); |
| |
| return GST_FLOW_OK; |
| } |
| |
| static void |
| gst_dicetv_create_map (GstDiceTV * filter, GstVideoInfo * info) |
| { |
| gint x, y, i; |
| gint width, height; |
| |
| width = GST_VIDEO_INFO_WIDTH (info); |
| height = GST_VIDEO_INFO_HEIGHT (info); |
| |
| if (width <= 0 || height <= 0) |
| return; |
| |
| filter->g_map_height = height >> filter->g_cube_bits; |
| filter->g_map_width = width >> filter->g_cube_bits; |
| filter->g_cube_size = 1 << filter->g_cube_bits; |
| |
| i = 0; |
| |
| for (y = 0; y < filter->g_map_height; y++) { |
| for (x = 0; x < filter->g_map_width; x++) { |
| // dicemap[i] = ((i + y) & 0x3); /* Up, Down, Left or Right */ |
| filter->dicemap[i] = (fastrand () >> 24) & 0x03; |
| i++; |
| } |
| } |
| } |
| |
| static void |
| gst_dicetv_set_property (GObject * object, guint prop_id, const GValue * value, |
| GParamSpec * pspec) |
| { |
| GstDiceTV *filter = GST_DICETV (object); |
| |
| switch (prop_id) { |
| case PROP_CUBE_BITS: |
| GST_OBJECT_LOCK (filter); |
| filter->g_cube_bits = g_value_get_int (value); |
| gst_dicetv_create_map (filter, &GST_VIDEO_FILTER (filter)->in_info); |
| GST_OBJECT_UNLOCK (filter); |
| break; |
| default: |
| G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
| break; |
| } |
| } |
| |
| static void |
| gst_dicetv_get_property (GObject * object, guint prop_id, GValue * value, |
| GParamSpec * pspec) |
| { |
| GstDiceTV *filter = GST_DICETV (object); |
| |
| switch (prop_id) { |
| case PROP_CUBE_BITS: |
| g_value_set_int (value, filter->g_cube_bits); |
| break; |
| default: |
| G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
| break; |
| } |
| } |
| |
| static void |
| gst_dicetv_finalize (GObject * object) |
| { |
| GstDiceTV *filter = GST_DICETV (object); |
| |
| g_free (filter->dicemap); |
| filter->dicemap = NULL; |
| |
| G_OBJECT_CLASS (parent_class)->finalize (object); |
| } |
| |
| static void |
| gst_dicetv_class_init (GstDiceTVClass * klass) |
| { |
| GObjectClass *gobject_class = (GObjectClass *) klass; |
| GstElementClass *gstelement_class = (GstElementClass *) klass; |
| GstVideoFilterClass *vfilter_class = (GstVideoFilterClass *) klass; |
| |
| gobject_class->set_property = gst_dicetv_set_property; |
| gobject_class->get_property = gst_dicetv_get_property; |
| gobject_class->finalize = gst_dicetv_finalize; |
| |
| g_object_class_install_property (gobject_class, PROP_CUBE_BITS, |
| g_param_spec_int ("square-bits", "Square Bits", "The size of the Squares", |
| MIN_CUBE_BITS, MAX_CUBE_BITS, DEFAULT_CUBE_BITS, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE)); |
| |
| gst_element_class_set_static_metadata (gstelement_class, "DiceTV effect", |
| "Filter/Effect/Video", |
| "'Dices' the screen up into many small squares", |
| "Wim Taymans <wim.taymans@gmail.be>"); |
| |
| gst_element_class_add_pad_template (gstelement_class, |
| gst_static_pad_template_get (&gst_dicetv_sink_template)); |
| gst_element_class_add_pad_template (gstelement_class, |
| gst_static_pad_template_get (&gst_dicetv_src_template)); |
| |
| vfilter_class->set_info = GST_DEBUG_FUNCPTR (gst_dicetv_set_info); |
| vfilter_class->transform_frame = |
| GST_DEBUG_FUNCPTR (gst_dicetv_transform_frame); |
| } |
| |
| static void |
| gst_dicetv_init (GstDiceTV * filter) |
| { |
| filter->dicemap = NULL; |
| filter->g_cube_bits = DEFAULT_CUBE_BITS; |
| filter->g_cube_size = 0; |
| filter->g_map_height = 0; |
| filter->g_map_width = 0; |
| } |