| /* |
| * GStreamer |
| * Copyright (C) <2010> Luis de Bethencourt <luis@debethencourt.com> |
| * |
| * Chromium - burning chrome video effect. |
| * Based on Pete Warden's FreeFrame plugin with the same name. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| * DEALINGS IN THE SOFTWARE. |
| * |
| * Alternatively, the contents of this file may be used under the |
| * GNU Lesser General Public License Version 2.1 (the "LGPL"), in |
| * which case the following provisions apply instead of the ones |
| * mentioned above: |
| * |
| * 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-chromium |
| * |
| * Chromium breaks the colors of a video stream in realtime. |
| * |
| * <refsect2> |
| * <title>Example launch line</title> |
| * |[ |
| * gst-launch-1.0 -v videotestsrc ! chromium ! videoconvert ! autovideosink |
| * ]| This pipeline shows the effect of chromium on a test stream |
| * </refsect2> |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| # include <config.h> |
| #endif |
| |
| #include <math.h> |
| #include <gst/gst.h> |
| |
| #include "gstplugin.h" |
| #include "gstchromium.h" |
| |
| #define gst_chromium_parent_class parent_class |
| G_DEFINE_TYPE (GstChromium, gst_chromium, GST_TYPE_VIDEO_FILTER); |
| |
| GST_DEBUG_CATEGORY_STATIC (gst_chromium_debug); |
| #define GST_CAT_DEFAULT gst_chromium_debug |
| |
| #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 |
| |
| /* Filter signals and args. */ |
| enum |
| { |
| LAST_SIGNAL |
| }; |
| |
| enum |
| { |
| PROP_0 = 0, |
| PROP_EDGE_A, |
| PROP_EDGE_B, |
| }; |
| |
| /* Initializations */ |
| |
| #define DEFAULT_EDGE_A 200 |
| #define DEFAULT_EDGE_B 1 |
| |
| const float pi = 3.141582f; |
| |
| gint cosTablePi = 512; |
| gint cosTableTwoPi = (2 * 512); |
| gint cosTableOne = 512; |
| gint cosTableMask = 1023; |
| |
| gint cosTable[2 * 512]; |
| |
| void setup_cos_table (void); |
| static gint cos_from_table (int angle); |
| static inline int abs_int (int val); |
| static void transform (guint32 * src, guint32 * dest, gint video_area, |
| gint edge_a, gint edge_b); |
| |
| /* The capabilities of the inputs and outputs. */ |
| |
| static GstStaticPadTemplate gst_chromium_sink_template = |
| GST_STATIC_PAD_TEMPLATE ("sink", |
| GST_PAD_SINK, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS (CAPS_STR) |
| ); |
| |
| static GstStaticPadTemplate gst_chromium_src_template = |
| GST_STATIC_PAD_TEMPLATE ("src", |
| GST_PAD_SRC, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS (CAPS_STR) |
| ); |
| |
| static void gst_chromium_set_property (GObject * object, guint prop_id, |
| const GValue * value, GParamSpec * pspec); |
| static void gst_chromium_get_property (GObject * object, guint prop_id, |
| GValue * value, GParamSpec * pspec); |
| static void gst_chromium_finalize (GObject * object); |
| |
| static GstFlowReturn gst_chromium_transform_frame (GstVideoFilter * vfilter, |
| GstVideoFrame * in_frame, GstVideoFrame * out_frame); |
| |
| /* GObject vmethod implementations */ |
| |
| /* Initialize the chromium's class. */ |
| static void |
| gst_chromium_class_init (GstChromiumClass * klass) |
| { |
| GObjectClass *gobject_class = (GObjectClass *) klass; |
| GstElementClass *gstelement_class = (GstElementClass *) klass; |
| GstVideoFilterClass *vfilter_class = (GstVideoFilterClass *) klass; |
| |
| gst_element_class_set_static_metadata (gstelement_class, "Chromium", |
| "Filter/Effect/Video", |
| "Chromium breaks the colors of the video signal.", |
| "Luis de Bethencourt <luis@debethencourt.com>"); |
| |
| gst_element_class_add_static_pad_template (gstelement_class, |
| &gst_chromium_sink_template); |
| gst_element_class_add_static_pad_template (gstelement_class, |
| &gst_chromium_src_template); |
| |
| gobject_class->set_property = gst_chromium_set_property; |
| gobject_class->get_property = gst_chromium_get_property; |
| gobject_class->finalize = gst_chromium_finalize; |
| |
| g_object_class_install_property (gobject_class, PROP_EDGE_A, |
| g_param_spec_uint ("edge-a", "Edge A", |
| "First edge parameter", 0, 256, DEFAULT_EDGE_A, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE)); |
| |
| g_object_class_install_property (gobject_class, PROP_EDGE_B, |
| g_param_spec_uint ("edge-b", "Edge B", |
| "Second edge parameter", 0, 256, DEFAULT_EDGE_B, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE)); |
| |
| vfilter_class->transform_frame = |
| GST_DEBUG_FUNCPTR (gst_chromium_transform_frame); |
| } |
| |
| /* Initialize the element, |
| * instantiate pads and add them to element, |
| * set pad calback functions, and |
| * initialize instance structure. |
| */ |
| static void |
| gst_chromium_init (GstChromium * filter) |
| { |
| filter->edge_a = DEFAULT_EDGE_A; |
| filter->edge_b = DEFAULT_EDGE_B; |
| |
| setup_cos_table (); |
| } |
| |
| static void |
| gst_chromium_set_property (GObject * object, guint prop_id, |
| const GValue * value, GParamSpec * pspec) |
| { |
| GstChromium *filter = GST_CHROMIUM (object); |
| |
| switch (prop_id) { |
| case PROP_EDGE_A: |
| filter->edge_a = g_value_get_uint (value); |
| break; |
| case PROP_EDGE_B: |
| filter->edge_b = g_value_get_uint (value); |
| break; |
| default: |
| G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
| break; |
| } |
| } |
| |
| static void |
| gst_chromium_get_property (GObject * object, guint prop_id, |
| GValue * value, GParamSpec * pspec) |
| { |
| GstChromium *filter = GST_CHROMIUM (object); |
| |
| GST_OBJECT_LOCK (filter); |
| switch (prop_id) { |
| case PROP_EDGE_A: |
| g_value_set_uint (value, filter->edge_a); |
| break; |
| case PROP_EDGE_B: |
| g_value_set_uint (value, filter->edge_b); |
| break; |
| default: |
| G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
| break; |
| } |
| GST_OBJECT_UNLOCK (filter); |
| } |
| |
| static void |
| gst_chromium_finalize (GObject * object) |
| { |
| G_OBJECT_CLASS (parent_class)->finalize (object); |
| } |
| |
| /* GstElement vmethod implementations */ |
| |
| /* Actual processing. */ |
| static GstFlowReturn |
| gst_chromium_transform_frame (GstVideoFilter * vfilter, |
| GstVideoFrame * in_frame, GstVideoFrame * out_frame) |
| { |
| GstChromium *filter = GST_CHROMIUM (vfilter); |
| gint video_size, edge_a, edge_b; |
| guint32 *src, *dest; |
| GstClockTime timestamp; |
| gint64 stream_time; |
| |
| src = GST_VIDEO_FRAME_PLANE_DATA (in_frame, 0); |
| dest = GST_VIDEO_FRAME_PLANE_DATA (out_frame, 0); |
| |
| /* GstController: update the properties */ |
| timestamp = GST_BUFFER_TIMESTAMP (in_frame->buffer); |
| stream_time = |
| gst_segment_to_stream_time (&GST_BASE_TRANSFORM (filter)->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); |
| |
| GST_OBJECT_LOCK (filter); |
| edge_a = filter->edge_a; |
| edge_b = filter->edge_b; |
| GST_OBJECT_UNLOCK (filter); |
| |
| video_size = GST_VIDEO_FRAME_WIDTH (in_frame) * |
| GST_VIDEO_FRAME_HEIGHT (in_frame); |
| transform (src, dest, video_size, edge_a, edge_b); |
| |
| return GST_FLOW_OK; |
| } |
| |
| /* Entry point to initialize the plug-in. |
| * Register the element factories and other features. */ |
| gboolean |
| gst_chromium_plugin_init (GstPlugin * chromium) |
| { |
| /* debug category for fltering log messages */ |
| GST_DEBUG_CATEGORY_INIT (gst_chromium_debug, "chromium", 0, |
| "Template chromium"); |
| |
| return gst_element_register (chromium, "chromium", GST_RANK_NONE, |
| GST_TYPE_CHROMIUM); |
| } |
| |
| /*** Now the image processing work.... ***/ |
| /* Set up the cosine table. */ |
| void |
| setup_cos_table (void) |
| { |
| int angle; |
| |
| for (angle = 0; angle < cosTableTwoPi; ++angle) { |
| float angleInRadians = ((float) (angle) / cosTablePi) * pi; |
| cosTable[angle] = (int) (cos (angleInRadians) * cosTableOne); |
| } |
| } |
| |
| /* Keep the values absolute. */ |
| static inline int |
| abs_int (int val) |
| { |
| if (val > 0) { |
| return val; |
| } else { |
| return -val; |
| } |
| } |
| |
| /* Cosine from Table. */ |
| static gint |
| cos_from_table (int angle) |
| { |
| angle &= cosTableMask; |
| return cosTable[angle]; |
| } |
| |
| /* Transform processes each frame. */ |
| static void |
| transform (guint32 * src, guint32 * dest, gint video_area, |
| gint edge_a, gint edge_b) |
| { |
| guint32 in; |
| gint x, red, green, blue; |
| |
| for (x = 0; x < video_area; x++) { |
| in = *src++; |
| |
| red = (in >> 16) & 0xff; |
| green = (in >> 8) & 0xff; |
| blue = (in) & 0xff; |
| |
| red = abs_int (cos_from_table ((red + edge_a) + ((red * edge_b) / 2))); |
| green = abs_int (cos_from_table ( |
| (green + edge_a) + ((green * edge_b) / 2))); |
| blue = abs_int (cos_from_table ((blue + edge_a) + ((blue * edge_b) / 2))); |
| |
| red = CLAMP (red, 0, 255); |
| green = CLAMP (green, 0, 255); |
| blue = CLAMP (blue, 0, 255); |
| |
| *dest++ = (red << 16) | (green << 8) | blue; |
| } |
| } |