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439 lines
13 KiB
C
439 lines
13 KiB
C
/* GStreamer
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* Copyright (C) 1999 Erik Walthinsen <omega@cse.ogi.edu>
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* Copyright (C) 2007 Wim Taymans <wim.taymans@collabora.co.uk>
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* Copyright (C) 2007 Edward Hervey <edward.hervey@collabora.co.uk>
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* Copyright (C) 2007 Jan Schmidt <thaytan@noraisin.net>
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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., 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-chromahold
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*
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* The chromahold element will remove all color information for
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* all colors except a single one and converts them to grayscale.
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*
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* Sample pipeline:
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* |[
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* gst-launch videotestsrc pattern=smpte75 ! \
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* chromahold target-r=0 target-g=0 target-b=255 ! \
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* ffmpegcolorspace ! autovideosink \
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* ]| This pipeline only keeps the red color.
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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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/* FIXME 0.11: suppress warnings for deprecated API such as GStaticRecMutex
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* with newer GLib versions (>= 2.31.0) */
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#define GLIB_DISABLE_DEPRECATION_WARNINGS
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#include "gstchromahold.h"
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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GST_DEBUG_CATEGORY_STATIC (gst_chroma_hold_debug);
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#define GST_CAT_DEFAULT gst_chroma_hold_debug
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#define DEFAULT_TARGET_R 255
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#define DEFAULT_TARGET_G 0
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#define DEFAULT_TARGET_B 0
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#define DEFAULT_TOLERANCE 30
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enum
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{
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PROP_0,
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PROP_TARGET_R,
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PROP_TARGET_G,
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PROP_TARGET_B,
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PROP_TOLERANCE,
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PROP_LAST
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};
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static GstStaticPadTemplate gst_chroma_hold_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
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("{ ARGB, BGRA, ABGR, RGBA, xRGB, BGRx, xBGR, RGBx}"))
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);
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static GstStaticPadTemplate gst_chroma_hold_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
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("{ ARGB, BGRA, ABGR, RGBA, xRGB, BGRx, xBGR, RGBx}"))
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);
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#define GST_CHROMA_HOLD_LOCK(self) G_STMT_START { \
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GST_LOG_OBJECT (self, "Locking chromahold from thread %p", g_thread_self ()); \
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g_static_mutex_lock (&self->lock); \
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GST_LOG_OBJECT (self, "Locked chromahold from thread %p", g_thread_self ()); \
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} G_STMT_END
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#define GST_CHROMA_HOLD_UNLOCK(self) G_STMT_START { \
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GST_LOG_OBJECT (self, "Unlocking chromahold from thread %p", \
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g_thread_self ()); \
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g_static_mutex_unlock (&self->lock); \
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} G_STMT_END
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static gboolean gst_chroma_hold_start (GstBaseTransform * trans);
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static gboolean gst_chroma_hold_set_info (GstVideoFilter * vfilter,
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GstCaps * incaps, GstVideoInfo * in_info, GstCaps * outcaps,
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GstVideoInfo * out_info);
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static GstFlowReturn gst_chroma_hold_transform_frame_ip (GstVideoFilter *
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vfilter, GstVideoFrame * frame);
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static void gst_chroma_hold_before_transform (GstBaseTransform * btrans,
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GstBuffer * buf);
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static void gst_chroma_hold_init_params (GstChromaHold * self);
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static gboolean gst_chroma_hold_set_process_function (GstChromaHold * self);
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static void gst_chroma_hold_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_chroma_hold_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_chroma_hold_finalize (GObject * object);
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#define gst_chroma_hold_parent_class parent_class
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G_DEFINE_TYPE (GstChromaHold, gst_chroma_hold, GST_TYPE_VIDEO_FILTER);
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static void
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gst_chroma_hold_class_init (GstChromaHoldClass * 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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GstBaseTransformClass *btrans_class = (GstBaseTransformClass *) klass;
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GstVideoFilterClass *vfilter_class = (GstVideoFilterClass *) klass;
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gobject_class->set_property = gst_chroma_hold_set_property;
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gobject_class->get_property = gst_chroma_hold_get_property;
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gobject_class->finalize = gst_chroma_hold_finalize;
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TARGET_R,
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g_param_spec_uint ("target-r", "Target Red", "The Red target", 0, 255,
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DEFAULT_TARGET_R,
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G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TARGET_G,
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g_param_spec_uint ("target-g", "Target Green", "The Green target", 0, 255,
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DEFAULT_TARGET_G,
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G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TARGET_B,
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g_param_spec_uint ("target-b", "Target Blue", "The Blue target", 0, 255,
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DEFAULT_TARGET_B,
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G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TOLERANCE,
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g_param_spec_uint ("tolerance", "Tolerance",
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"Tolerance for the target color", 0, 180, DEFAULT_TOLERANCE,
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G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
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btrans_class->start = GST_DEBUG_FUNCPTR (gst_chroma_hold_start);
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btrans_class->before_transform =
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GST_DEBUG_FUNCPTR (gst_chroma_hold_before_transform);
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vfilter_class->transform_frame_ip =
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GST_DEBUG_FUNCPTR (gst_chroma_hold_transform_frame_ip);
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vfilter_class->set_info = GST_DEBUG_FUNCPTR (gst_chroma_hold_set_info);
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gst_element_class_set_details_simple (gstelement_class, "Chroma hold filter",
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"Filter/Effect/Video",
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"Removes all color information except for one color",
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"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&gst_chroma_hold_sink_template));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&gst_chroma_hold_src_template));
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GST_DEBUG_CATEGORY_INIT (gst_chroma_hold_debug, "chromahold", 0,
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"chromahold - Removes all color information except for one color");
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}
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static void
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gst_chroma_hold_init (GstChromaHold * self)
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{
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self->target_r = DEFAULT_TARGET_R;
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self->target_g = DEFAULT_TARGET_G;
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self->target_b = DEFAULT_TARGET_B;
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self->tolerance = DEFAULT_TOLERANCE;
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g_static_mutex_init (&self->lock);
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}
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static void
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gst_chroma_hold_finalize (GObject * object)
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{
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GstChromaHold *self = GST_CHROMA_HOLD (object);
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g_static_mutex_free (&self->lock);
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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_chroma_hold_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstChromaHold *self = GST_CHROMA_HOLD (object);
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GST_CHROMA_HOLD_LOCK (self);
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switch (prop_id) {
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case PROP_TARGET_R:
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self->target_r = g_value_get_uint (value);
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gst_chroma_hold_init_params (self);
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break;
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case PROP_TARGET_G:
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self->target_g = g_value_get_uint (value);
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gst_chroma_hold_init_params (self);
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break;
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case PROP_TARGET_B:
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self->target_b = g_value_get_uint (value);
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gst_chroma_hold_init_params (self);
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break;
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case PROP_TOLERANCE:
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self->tolerance = g_value_get_uint (value);
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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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GST_CHROMA_HOLD_UNLOCK (self);
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}
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static void
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gst_chroma_hold_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstChromaHold *self = GST_CHROMA_HOLD (object);
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switch (prop_id) {
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case PROP_TARGET_R:
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g_value_set_uint (value, self->target_r);
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break;
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case PROP_TARGET_G:
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g_value_set_uint (value, self->target_g);
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break;
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case PROP_TARGET_B:
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g_value_set_uint (value, self->target_b);
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break;
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case PROP_TOLERANCE:
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g_value_set_uint (value, self->tolerance);
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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 gboolean
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gst_chroma_hold_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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GstChromaHold *self = GST_CHROMA_HOLD (vfilter);
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GST_CHROMA_HOLD_LOCK (self);
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GST_DEBUG_OBJECT (self,
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"Setting caps %" GST_PTR_FORMAT " -> %" GST_PTR_FORMAT, incaps, outcaps);
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self->format = GST_VIDEO_INFO_FORMAT (in_info);
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self->width = GST_VIDEO_INFO_WIDTH (in_info);
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self->height = GST_VIDEO_INFO_HEIGHT (in_info);
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if (!gst_chroma_hold_set_process_function (self)) {
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GST_WARNING_OBJECT (self, "No processing function for this caps");
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GST_CHROMA_HOLD_UNLOCK (self);
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return FALSE;
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}
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GST_CHROMA_HOLD_UNLOCK (self);
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return TRUE;
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}
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static inline gint
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rgb_to_hue (gint r, gint g, gint b)
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{
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gint m, M, C, C2, h;
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m = MIN (MIN (r, g), b);
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M = MAX (MAX (r, g), b);
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C = M - m;
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C2 = C >> 1;
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if (C == 0) {
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return G_MAXUINT;
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} else if (M == r) {
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h = ((256 * 60 * (g - b) + C2) / C);
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} else if (M == g) {
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h = ((256 * 60 * (b - r) + C2) / C) + 120 * 256;
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} else {
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/* if (M == b) */
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h = ((256 * 60 * (r - g) + C2) / C) + 240 * 256;
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}
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h >>= 8;
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if (h >= 360)
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h -= 360;
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else if (h < 0)
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h += 360;
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return h;
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}
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static inline gint
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hue_dist (gint h1, gint h2)
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{
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gint d1, d2;
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d1 = h1 - h2;
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d2 = h2 - h1;
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if (d1 < 0)
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d1 += 360;
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if (d2 < 0)
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d2 += 360;
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return MIN (d1, d2);
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}
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static void
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gst_chroma_hold_process_xrgb (GstVideoFrame * frame, gint width,
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gint height, GstChromaHold * self)
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{
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gint i, j;
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gint r, g, b;
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gint grey;
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gint h1, h2;
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gint tolerance = self->tolerance;
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gint p[4];
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gint diff;
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gint row_wrap;
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guint8 *dest;
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dest = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);
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p[0] = GST_VIDEO_FRAME_COMP_POFFSET (frame, 3);
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p[1] = GST_VIDEO_FRAME_COMP_POFFSET (frame, 0);
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p[2] = GST_VIDEO_FRAME_COMP_POFFSET (frame, 1);
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p[3] = GST_VIDEO_FRAME_COMP_POFFSET (frame, 2);
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row_wrap = GST_VIDEO_FRAME_PLANE_STRIDE (frame, 0) - 4 * width;
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h1 = self->hue;
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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 = dest[p[1]];
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g = dest[p[2]];
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b = dest[p[3]];
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h2 = rgb_to_hue (r, g, b);
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diff = hue_dist (h1, h2);
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if (h1 == G_MAXUINT || diff > tolerance) {
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grey = (13938 * r + 46869 * g + 4730 * b) >> 16;
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grey = CLAMP (grey, 0, 255);
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dest[p[1]] = grey;
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dest[p[2]] = grey;
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dest[p[3]] = grey;
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}
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dest += 4;
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}
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dest += row_wrap;
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}
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}
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/* Protected with the chroma hold lock */
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static void
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gst_chroma_hold_init_params (GstChromaHold * self)
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{
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self->hue = rgb_to_hue (self->target_r, self->target_g, self->target_b);
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}
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/* Protected with the chroma hold lock */
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static gboolean
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gst_chroma_hold_set_process_function (GstChromaHold * self)
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{
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self->process = NULL;
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switch (self->format) {
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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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self->process = gst_chroma_hold_process_xrgb;
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break;
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default:
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break;
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}
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return self->process != NULL;
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}
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static gboolean
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gst_chroma_hold_start (GstBaseTransform * btrans)
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{
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GstChromaHold *self = GST_CHROMA_HOLD (btrans);
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GST_CHROMA_HOLD_LOCK (self);
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gst_chroma_hold_init_params (self);
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GST_CHROMA_HOLD_UNLOCK (self);
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return TRUE;
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}
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static void
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gst_chroma_hold_before_transform (GstBaseTransform * btrans, GstBuffer * buf)
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{
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GstChromaHold *self = GST_CHROMA_HOLD (btrans);
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GstClockTime timestamp;
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timestamp = gst_segment_to_stream_time (&btrans->segment, GST_FORMAT_TIME,
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GST_BUFFER_TIMESTAMP (buf));
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GST_LOG ("Got stream time of %" GST_TIME_FORMAT, GST_TIME_ARGS (timestamp));
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if (GST_CLOCK_TIME_IS_VALID (timestamp))
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gst_object_sync_values (GST_OBJECT (self), timestamp);
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}
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static GstFlowReturn
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gst_chroma_hold_transform_frame_ip (GstVideoFilter * vfilter,
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GstVideoFrame * frame)
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{
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GstChromaHold *self = GST_CHROMA_HOLD (vfilter);
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GST_CHROMA_HOLD_LOCK (self);
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if (G_UNLIKELY (!self->process)) {
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GST_ERROR_OBJECT (self, "Not negotiated yet");
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GST_CHROMA_HOLD_UNLOCK (self);
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return GST_FLOW_NOT_NEGOTIATED;
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}
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self->process (frame, self->width, self->height, self);
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GST_CHROMA_HOLD_UNLOCK (self);
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return GST_FLOW_OK;
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}
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