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415 lines
12 KiB
C
415 lines
12 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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* Copyright (C) <2003> David Schleef <ds@schleef.org>
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* Copyright (C) 2003 Arwed v. Merkatz <v.merkatz@gmx.net>
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* Copyright (C) 2006 Mark Nauwelaerts <manauw@skynet.be>
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* Copyright (C) 2010 Sebastian Dröge <sebastian.droege@collabora.co.uk>
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*
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* This library is free software; 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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/*
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* This file was (probably) generated from
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* gstvideotemplate.c,v 1.12 2004/01/07 21:07:12 ds Exp
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* and
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* make_filter,v 1.6 2004/01/07 21:33:01 ds Exp
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*/
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/**
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* SECTION:element-gamma
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* @title: gamma
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*
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* Performs gamma correction on a video stream.
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*
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* ## Example launch line
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* |[
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* gst-launch-1.0 videotestsrc ! gamma gamma=2.0 ! videoconvert ! ximagesink
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* ]| This pipeline will make the image "brighter".
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* |[
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* gst-launch-1.0 videotestsrc ! gamma gamma=0.5 ! videoconvert ! ximagesink
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* ]| This pipeline will make the image "darker".
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*
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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 "gstgamma.h"
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#include <string.h>
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#include <math.h>
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#include <gst/video/video.h>
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GST_DEBUG_CATEGORY_STATIC (gamma_debug);
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#define GST_CAT_DEFAULT gamma_debug
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/* GstGamma properties */
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enum
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{
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PROP_0,
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PROP_GAMMA
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/* FILL ME */
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};
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#define DEFAULT_PROP_GAMMA 1
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static GstStaticPadTemplate gst_gamma_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 (GST_VIDEO_CAPS_MAKE ("{ AYUV, "
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"ARGB, BGRA, ABGR, RGBA, Y444, "
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"xRGB, RGBx, xBGR, BGRx, RGB, BGR, Y42B, NV12, "
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"NV21, YUY2, UYVY, YVYU, I420, YV12, IYUV, Y41B }"))
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);
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static GstStaticPadTemplate gst_gamma_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 (GST_VIDEO_CAPS_MAKE ("{ AYUV, "
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"ARGB, BGRA, ABGR, RGBA, Y444, "
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"xRGB, RGBx, xBGR, BGRx, RGB, BGR, Y42B, NV12, "
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"NV21, YUY2, UYVY, YVYU, I420, YV12, IYUV, Y41B }"))
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);
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static void gst_gamma_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_gamma_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static gboolean gst_gamma_set_info (GstVideoFilter * vfilter, GstCaps * incaps,
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GstVideoInfo * in_info, GstCaps * outcaps, GstVideoInfo * out_info);
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static GstFlowReturn gst_gamma_transform_frame_ip (GstVideoFilter * vfilter,
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GstVideoFrame * frame);
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static void gst_gamma_before_transform (GstBaseTransform * transform,
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GstBuffer * buf);
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static void gst_gamma_calculate_tables (GstGamma * gamma);
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G_DEFINE_TYPE (GstGamma, gst_gamma, GST_TYPE_VIDEO_FILTER);
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GST_ELEMENT_REGISTER_DEFINE (gamma, "gamma", GST_RANK_NONE, GST_TYPE_GAMMA);
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static void
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gst_gamma_class_init (GstGammaClass * g_class)
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{
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GObjectClass *gobject_class = (GObjectClass *) g_class;
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GstElementClass *gstelement_class = (GstElementClass *) g_class;
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GstBaseTransformClass *trans_class = (GstBaseTransformClass *) g_class;
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GstVideoFilterClass *vfilter_class = (GstVideoFilterClass *) g_class;
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GST_DEBUG_CATEGORY_INIT (gamma_debug, "gamma", 0, "gamma");
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gobject_class->set_property = gst_gamma_set_property;
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gobject_class->get_property = gst_gamma_get_property;
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g_object_class_install_property (gobject_class, PROP_GAMMA,
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g_param_spec_double ("gamma", "Gamma", "gamma",
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0.01, 10, DEFAULT_PROP_GAMMA,
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GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE));
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gst_element_class_set_static_metadata (gstelement_class,
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"Video gamma correction", "Filter/Effect/Video",
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"Adjusts gamma on a video stream", "Arwed v. Merkatz <v.merkatz@gmx.net");
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gst_element_class_add_static_pad_template (gstelement_class,
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&gst_gamma_sink_template);
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gst_element_class_add_static_pad_template (gstelement_class,
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&gst_gamma_src_template);
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trans_class->before_transform =
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GST_DEBUG_FUNCPTR (gst_gamma_before_transform);
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trans_class->transform_ip_on_passthrough = FALSE;
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vfilter_class->set_info = GST_DEBUG_FUNCPTR (gst_gamma_set_info);
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vfilter_class->transform_frame_ip =
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GST_DEBUG_FUNCPTR (gst_gamma_transform_frame_ip);
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}
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static void
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gst_gamma_init (GstGamma * gamma)
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{
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/* properties */
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gamma->gamma = DEFAULT_PROP_GAMMA;
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gst_gamma_calculate_tables (gamma);
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}
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static void
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gst_gamma_set_property (GObject * object, guint prop_id, const GValue * value,
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GParamSpec * pspec)
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{
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GstGamma *gamma = GST_GAMMA (object);
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switch (prop_id) {
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case PROP_GAMMA:{
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gdouble val = g_value_get_double (value);
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GST_DEBUG_OBJECT (gamma, "Changing gamma from %lf to %lf", gamma->gamma,
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val);
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GST_OBJECT_LOCK (gamma);
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gamma->gamma = val;
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GST_OBJECT_UNLOCK (gamma);
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gst_gamma_calculate_tables (gamma);
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break;
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}
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_gamma_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstGamma *gamma = GST_GAMMA (object);
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switch (prop_id) {
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case PROP_GAMMA:
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g_value_set_double (value, gamma->gamma);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_gamma_calculate_tables (GstGamma * gamma)
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{
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gint n;
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gdouble val;
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gdouble exp;
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gboolean passthrough = FALSE;
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GST_OBJECT_LOCK (gamma);
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if (gamma->gamma == 1.0) {
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passthrough = TRUE;
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} else {
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exp = 1.0 / gamma->gamma;
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for (n = 0; n < 256; n++) {
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val = n / 255.0;
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val = pow (val, exp);
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val = 255.0 * val;
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gamma->gamma_table[n] = (guint8) floor (val + 0.5);
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}
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}
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GST_OBJECT_UNLOCK (gamma);
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gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (gamma), passthrough);
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}
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static void
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gst_gamma_planar_yuv_ip (GstGamma * gamma, GstVideoFrame * frame)
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{
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gint i, j, height;
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gint width, stride, row_wrap;
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const guint8 *table = gamma->gamma_table;
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guint8 *data;
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data = GST_VIDEO_FRAME_COMP_DATA (frame, 0);
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stride = GST_VIDEO_FRAME_COMP_STRIDE (frame, 0);
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width = GST_VIDEO_FRAME_COMP_WIDTH (frame, 0);
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height = GST_VIDEO_FRAME_COMP_HEIGHT (frame, 0);
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row_wrap = stride - width;
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for (i = 0; i < height; i++) {
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for (j = 0; j < width; j++) {
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*data = table[*data];
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data++;
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}
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data += row_wrap;
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}
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}
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static void
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gst_gamma_packed_yuv_ip (GstGamma * gamma, GstVideoFrame * frame)
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{
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gint i, j, height;
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gint width, stride, row_wrap;
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gint pixel_stride;
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const guint8 *table = gamma->gamma_table;
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guint8 *data;
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data = GST_VIDEO_FRAME_COMP_DATA (frame, 0);
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stride = GST_VIDEO_FRAME_COMP_STRIDE (frame, 0);
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width = GST_VIDEO_FRAME_COMP_WIDTH (frame, 0);
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height = GST_VIDEO_FRAME_COMP_HEIGHT (frame, 0);
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pixel_stride = GST_VIDEO_FRAME_COMP_PSTRIDE (frame, 0);
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row_wrap = stride - pixel_stride * width;
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for (i = 0; i < height; i++) {
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for (j = 0; j < width; j++) {
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*data = table[*data];
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data += pixel_stride;
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}
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data += row_wrap;
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}
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}
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static const int cog_ycbcr_to_rgb_matrix_8bit_sdtv[] = {
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298, 0, 409, -57068,
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298, -100, -208, 34707,
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298, 516, 0, -70870,
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};
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static const gint cog_rgb_to_ycbcr_matrix_8bit_sdtv[] = {
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66, 129, 25, 4096,
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-38, -74, 112, 32768,
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112, -94, -18, 32768,
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};
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#define APPLY_MATRIX(m,o,v1,v2,v3) ((m[o*4] * v1 + m[o*4+1] * v2 + m[o*4+2] * v3 + m[o*4+3]) >> 8)
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static void
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gst_gamma_packed_rgb_ip (GstGamma * gamma, GstVideoFrame * frame)
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{
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gint i, j, height;
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gint width, stride, row_wrap;
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gint pixel_stride;
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const guint8 *table = gamma->gamma_table;
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gint offsets[3];
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gint r, g, b;
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gint y, u, v;
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guint8 *data;
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data = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);
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stride = GST_VIDEO_FRAME_PLANE_STRIDE (frame, 0);
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width = GST_VIDEO_FRAME_COMP_WIDTH (frame, 0);
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height = GST_VIDEO_FRAME_COMP_HEIGHT (frame, 0);
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offsets[0] = GST_VIDEO_FRAME_COMP_OFFSET (frame, 0);
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offsets[1] = GST_VIDEO_FRAME_COMP_OFFSET (frame, 1);
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offsets[2] = GST_VIDEO_FRAME_COMP_OFFSET (frame, 2);
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pixel_stride = GST_VIDEO_FRAME_COMP_PSTRIDE (frame, 0);
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row_wrap = stride - pixel_stride * width;
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for (i = 0; i < height; i++) {
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for (j = 0; j < width; j++) {
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r = data[offsets[0]];
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g = data[offsets[1]];
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b = data[offsets[2]];
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y = APPLY_MATRIX (cog_rgb_to_ycbcr_matrix_8bit_sdtv, 0, r, g, b);
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u = APPLY_MATRIX (cog_rgb_to_ycbcr_matrix_8bit_sdtv, 1, r, g, b);
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v = APPLY_MATRIX (cog_rgb_to_ycbcr_matrix_8bit_sdtv, 2, r, g, b);
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y = table[CLAMP (y, 0, 255)];
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r = APPLY_MATRIX (cog_ycbcr_to_rgb_matrix_8bit_sdtv, 0, y, u, v);
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g = APPLY_MATRIX (cog_ycbcr_to_rgb_matrix_8bit_sdtv, 1, y, u, v);
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b = APPLY_MATRIX (cog_ycbcr_to_rgb_matrix_8bit_sdtv, 2, y, u, v);
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data[offsets[0]] = CLAMP (r, 0, 255);
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data[offsets[1]] = CLAMP (g, 0, 255);
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data[offsets[2]] = CLAMP (b, 0, 255);
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data += pixel_stride;
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}
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data += row_wrap;
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}
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}
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static gboolean
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gst_gamma_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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GstGamma *gamma = GST_GAMMA (vfilter);
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GST_DEBUG_OBJECT (gamma,
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"setting caps: in %" GST_PTR_FORMAT " out %" GST_PTR_FORMAT, incaps,
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outcaps);
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switch (GST_VIDEO_INFO_FORMAT (in_info)) {
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case GST_VIDEO_FORMAT_I420:
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case GST_VIDEO_FORMAT_YV12:
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case GST_VIDEO_FORMAT_Y41B:
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case GST_VIDEO_FORMAT_Y42B:
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case GST_VIDEO_FORMAT_Y444:
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case GST_VIDEO_FORMAT_NV12:
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case GST_VIDEO_FORMAT_NV21:
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gamma->process = gst_gamma_planar_yuv_ip;
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break;
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case GST_VIDEO_FORMAT_YUY2:
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case GST_VIDEO_FORMAT_UYVY:
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case GST_VIDEO_FORMAT_AYUV:
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case GST_VIDEO_FORMAT_YVYU:
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gamma->process = gst_gamma_packed_yuv_ip;
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break;
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case GST_VIDEO_FORMAT_ARGB:
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case GST_VIDEO_FORMAT_ABGR:
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case GST_VIDEO_FORMAT_RGBA:
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case GST_VIDEO_FORMAT_BGRA:
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case GST_VIDEO_FORMAT_xRGB:
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case GST_VIDEO_FORMAT_xBGR:
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case GST_VIDEO_FORMAT_RGBx:
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case GST_VIDEO_FORMAT_BGRx:
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case GST_VIDEO_FORMAT_RGB:
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case GST_VIDEO_FORMAT_BGR:
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gamma->process = gst_gamma_packed_rgb_ip;
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break;
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default:
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goto invalid_caps;
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break;
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}
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return TRUE;
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/* ERRORS */
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invalid_caps:
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{
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GST_ERROR_OBJECT (gamma, "Invalid caps: %" GST_PTR_FORMAT, incaps);
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return FALSE;
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}
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}
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static void
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gst_gamma_before_transform (GstBaseTransform * base, GstBuffer * outbuf)
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{
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GstGamma *gamma = GST_GAMMA (base);
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GstClockTime timestamp, stream_time;
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timestamp = GST_BUFFER_TIMESTAMP (outbuf);
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stream_time =
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gst_segment_to_stream_time (&base->segment, GST_FORMAT_TIME, timestamp);
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GST_DEBUG_OBJECT (gamma, "sync to %" GST_TIME_FORMAT,
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GST_TIME_ARGS (timestamp));
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if (GST_CLOCK_TIME_IS_VALID (stream_time))
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gst_object_sync_values (GST_OBJECT (gamma), stream_time);
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}
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static GstFlowReturn
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gst_gamma_transform_frame_ip (GstVideoFilter * vfilter, GstVideoFrame * frame)
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{
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GstGamma *gamma = GST_GAMMA (vfilter);
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if (!gamma->process)
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goto not_negotiated;
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GST_OBJECT_LOCK (gamma);
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gamma->process (gamma, frame);
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GST_OBJECT_UNLOCK (gamma);
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return GST_FLOW_OK;
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/* ERRORS */
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not_negotiated:
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{
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GST_ERROR_OBJECT (gamma, "Not negotiated yet");
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return GST_FLOW_NOT_NEGOTIATED;
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}
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}
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