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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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Hopefully that'll make hotdoc pick up the docs for these elements. Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1428>
695 lines
20 KiB
C
695 lines
20 KiB
C
/* GStreamer
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* Copyright (C) 2013 David Schleef <ds@schleef.org>
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* Copyright (C) 2013 Rdio Inc <ingestions@rdio.com>
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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 Street, Suite 500,
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* Boston, MA 02110-1335, USA.
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*/
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/**
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* SECTION:element-ivtc
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* @title: gstivtc
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*
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* The ivtc element is an inverse telecine filter. It takes interlaced
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* video that was created from progressive content using a telecine
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* filter, and reconstructs the original progressive content.
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*
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* ## Example launch line
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* |[
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* gst-launch-1.0 -v videotestsrc pattern=ball ! video/x-raw,framerate=24/1 !
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* interlace !
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* ivtc ! video/x-raw,framerate=24/1 ! fakesink
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* ]|
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*
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* This pipeline creates a progressive video stream at 24 fps, and
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* converts it to a 60 fields per second interlaced stream. Then the
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* stream is inversed telecine'd back to 24 fps, yielding approximately
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* the original videotestsrc content.
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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 <gst/gst.h>
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#include <gst/base/gstbasetransform.h>
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#include <gst/video/video.h>
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#include "gstivtc.h"
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#include <string.h>
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#include <math.h>
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/* only because element registration is in this file */
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#include "gstcombdetect.h"
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GST_DEBUG_CATEGORY_STATIC (gst_ivtc_debug_category);
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#define GST_CAT_DEFAULT gst_ivtc_debug_category
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/* prototypes */
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static GstCaps *gst_ivtc_transform_caps (GstBaseTransform * trans,
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GstPadDirection direction, GstCaps * caps, GstCaps * filter);
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static GstCaps *gst_ivtc_fixate_caps (GstBaseTransform * trans,
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GstPadDirection direction, GstCaps * caps, GstCaps * othercaps);
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static gboolean gst_ivtc_set_caps (GstBaseTransform * trans, GstCaps * incaps,
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GstCaps * outcaps);
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static gboolean gst_ivtc_sink_event (GstBaseTransform * trans,
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GstEvent * event);
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static GstFlowReturn gst_ivtc_transform (GstBaseTransform * trans,
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GstBuffer * inbuf, GstBuffer * outbuf);
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static void gst_ivtc_flush (GstIvtc * ivtc);
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static void gst_ivtc_retire_fields (GstIvtc * ivtc, int n_fields);
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static void gst_ivtc_construct_frame (GstIvtc * itvc, GstBuffer * outbuf);
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static int get_comb_score (GstVideoFrame * top, GstVideoFrame * bottom);
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enum
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{
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PROP_0
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};
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/* pad templates */
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#define MAX_WIDTH 2048
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#define VIDEO_CAPS \
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"video/x-raw, " \
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"format = (string) { I420, Y444, Y42B }, " \
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"width = [1, 2048], " \
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"height = " GST_VIDEO_SIZE_RANGE ", " \
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"framerate = " GST_VIDEO_FPS_RANGE
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static GstStaticPadTemplate gst_ivtc_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 (VIDEO_CAPS)
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);
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static GstStaticPadTemplate gst_ivtc_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 (VIDEO_CAPS)
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);
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/* class initialization */
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G_DEFINE_TYPE_WITH_CODE (GstIvtc, gst_ivtc, GST_TYPE_BASE_TRANSFORM,
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GST_DEBUG_CATEGORY_INIT (gst_ivtc_debug_category, "ivtc", 0,
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"debug category for ivtc element"));
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static void
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gst_ivtc_class_init (GstIvtcClass * klass)
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{
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GstBaseTransformClass *base_transform_class =
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GST_BASE_TRANSFORM_CLASS (klass);
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/* Setting up pads and setting metadata should be moved to
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base_class_init if you intend to subclass this class. */
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gst_element_class_add_static_pad_template (GST_ELEMENT_CLASS (klass),
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&gst_ivtc_sink_template);
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gst_element_class_add_static_pad_template (GST_ELEMENT_CLASS (klass),
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&gst_ivtc_src_template);
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gst_element_class_set_static_metadata (GST_ELEMENT_CLASS (klass),
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"Inverse Telecine", "Video/Filter", "Inverse Telecine Filter",
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"David Schleef <ds@schleef.org>");
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base_transform_class->transform_caps =
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GST_DEBUG_FUNCPTR (gst_ivtc_transform_caps);
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base_transform_class->fixate_caps = GST_DEBUG_FUNCPTR (gst_ivtc_fixate_caps);
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base_transform_class->set_caps = GST_DEBUG_FUNCPTR (gst_ivtc_set_caps);
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base_transform_class->sink_event = GST_DEBUG_FUNCPTR (gst_ivtc_sink_event);
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base_transform_class->transform = GST_DEBUG_FUNCPTR (gst_ivtc_transform);
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}
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static void
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gst_ivtc_init (GstIvtc * ivtc)
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{
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}
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static GstCaps *
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gst_ivtc_transform_caps (GstBaseTransform * trans,
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GstPadDirection direction, GstCaps * caps, GstCaps * filter)
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{
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GstCaps *othercaps;
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int i;
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othercaps = gst_caps_copy (caps);
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if (direction == GST_PAD_SRC) {
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GValue value = G_VALUE_INIT;
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GValue v = G_VALUE_INIT;
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g_value_init (&value, GST_TYPE_LIST);
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g_value_init (&v, G_TYPE_STRING);
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g_value_set_string (&v, "interleaved");
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gst_value_list_append_value (&value, &v);
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g_value_set_string (&v, "mixed");
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gst_value_list_append_value (&value, &v);
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g_value_set_string (&v, "progressive");
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gst_value_list_append_value (&value, &v);
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for (i = 0; i < gst_caps_get_size (othercaps); i++) {
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GstStructure *structure = gst_caps_get_structure (othercaps, i);
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gst_structure_set_value (structure, "interlace-mode", &value);
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gst_structure_remove_field (structure, "framerate");
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}
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g_value_unset (&value);
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g_value_unset (&v);
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} else {
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for (i = 0; i < gst_caps_get_size (othercaps); i++) {
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GstStructure *structure = gst_caps_get_structure (othercaps, i);
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gst_structure_set (structure, "interlace-mode", G_TYPE_STRING,
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"progressive", NULL);
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gst_structure_remove_field (structure, "framerate");
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}
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}
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if (filter) {
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GstCaps *intersect;
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intersect = gst_caps_intersect (othercaps, filter);
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gst_caps_unref (othercaps);
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othercaps = intersect;
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}
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return othercaps;
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}
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static GstCaps *
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gst_ivtc_fixate_caps (GstBaseTransform * trans, GstPadDirection direction,
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GstCaps * caps, GstCaps * othercaps)
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{
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GstCaps *result;
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GST_DEBUG_OBJECT (trans, "fixating caps %" GST_PTR_FORMAT, othercaps);
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result = gst_caps_make_writable (othercaps);
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if (direction == GST_PAD_SINK) {
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GstVideoInfo info;
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if (gst_video_info_from_caps (&info, caps)) {
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/* Smarter decision */
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GST_DEBUG_OBJECT (trans, "Input framerate is %d/%d", info.fps_n,
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info.fps_d);
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if (info.fps_n == 30000 && info.fps_d == 1001)
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gst_caps_set_simple (result, "framerate", GST_TYPE_FRACTION, 24000,
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1001, NULL);
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else
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gst_caps_set_simple (result, "framerate", GST_TYPE_FRACTION, 24, 1,
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NULL);
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} else {
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gst_caps_set_simple (result, "framerate", GST_TYPE_FRACTION, 24, 1, NULL);
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}
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}
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result = gst_caps_fixate (result);
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return result;
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}
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static gboolean
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gst_ivtc_set_caps (GstBaseTransform * trans, GstCaps * incaps,
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GstCaps * outcaps)
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{
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GstIvtc *ivtc = GST_IVTC (trans);
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gst_video_info_from_caps (&ivtc->sink_video_info, incaps);
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gst_video_info_from_caps (&ivtc->src_video_info, outcaps);
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ivtc->field_duration = gst_util_uint64_scale_int (GST_SECOND,
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ivtc->sink_video_info.fps_d, ivtc->sink_video_info.fps_n * 2);
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GST_DEBUG_OBJECT (trans, "field duration %" GST_TIME_FORMAT,
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GST_TIME_ARGS (ivtc->field_duration));
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return TRUE;
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}
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/* sink and src pad event handlers */
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static gboolean
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gst_ivtc_sink_event (GstBaseTransform * trans, GstEvent * event)
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{
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GstIvtc *ivtc = GST_IVTC (trans);
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GST_DEBUG_OBJECT (ivtc, "sink_event");
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if (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT) {
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const GstSegment *seg;
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gst_ivtc_flush (ivtc);
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/* FIXME this should handle update events */
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gst_event_parse_segment (event, &seg);
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gst_segment_copy_into (seg, &ivtc->segment);
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ivtc->current_ts = ivtc->segment.start;
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}
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return GST_BASE_TRANSFORM_CLASS (gst_ivtc_parent_class)->sink_event (trans,
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event);
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}
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static void
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gst_ivtc_flush (GstIvtc * ivtc)
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{
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if (ivtc->n_fields > 0) {
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GST_FIXME_OBJECT (ivtc, "not sending flushed fields to srcpad");
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}
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gst_ivtc_retire_fields (ivtc, ivtc->n_fields);
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}
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enum
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{
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TOP_FIELD = 0,
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BOTTOM_FIELD = 1
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};
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static void
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add_field (GstIvtc * ivtc, GstBuffer * buffer, int parity, int index)
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{
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int i = ivtc->n_fields;
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GstClockTime ts;
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GstIvtcField *field = &ivtc->fields[i];
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g_return_if_fail (i < GST_IVTC_MAX_FIELDS);
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ts = GST_BUFFER_PTS (buffer) + index * ivtc->field_duration;
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if (ts + ivtc->field_duration < ivtc->segment.start) {
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/* drop, it's before our segment */
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return;
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}
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GST_DEBUG ("adding field %d", i);
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field->buffer = gst_buffer_ref (buffer);
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field->parity = parity;
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field->ts = ts;
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gst_video_frame_map (&ivtc->fields[i].frame, &ivtc->sink_video_info,
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buffer, GST_MAP_READ);
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ivtc->n_fields++;
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}
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static int
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similarity (GstIvtc * ivtc, int i1, int i2)
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{
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GstIvtcField *f1, *f2;
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int score;
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g_return_val_if_fail (i1 >= 0 && i1 < ivtc->n_fields, 0);
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g_return_val_if_fail (i2 >= 0 && i2 < ivtc->n_fields, 0);
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f1 = &ivtc->fields[i1];
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f2 = &ivtc->fields[i2];
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if (f1->parity == TOP_FIELD) {
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score = get_comb_score (&f1->frame, &f2->frame);
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} else {
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score = get_comb_score (&f2->frame, &f1->frame);
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}
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GST_DEBUG ("score %d", score);
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return score;
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}
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#define GET_LINE(frame,comp,line) (((unsigned char *)(frame)->data[k]) + \
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(line) * GST_VIDEO_FRAME_COMP_STRIDE((frame), (comp)))
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#define GET_LINE_IL(top,bottom,comp,line) \
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(((unsigned char *)(((line)&1)?(bottom):(top))->data[k]) + \
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(line) * GST_VIDEO_FRAME_COMP_STRIDE((top), (comp)))
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static void
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reconstruct (GstIvtc * ivtc, GstVideoFrame * dest_frame, int i1, int i2)
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{
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GstVideoFrame *top, *bottom;
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int width, height;
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int j, k;
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g_return_if_fail (i1 >= 0 && i1 < ivtc->n_fields);
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g_return_if_fail (i2 >= 0 && i2 < ivtc->n_fields);
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if (ivtc->fields[i1].parity == TOP_FIELD) {
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top = &ivtc->fields[i1].frame;
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bottom = &ivtc->fields[i2].frame;
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} else {
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bottom = &ivtc->fields[i1].frame;
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top = &ivtc->fields[i2].frame;
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}
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for (k = 0; k < 3; k++) {
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height = GST_VIDEO_FRAME_COMP_HEIGHT (top, k);
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width = GST_VIDEO_FRAME_COMP_WIDTH (top, k);
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for (j = 0; j < height; j++) {
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guint8 *dest = GET_LINE (dest_frame, k, j);
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guint8 *src = GET_LINE_IL (top, bottom, k, j);
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memcpy (dest, src, width);
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}
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}
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}
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static int
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reconstruct_line (guint8 * line1, guint8 * line2, int i, int a, int b, int c,
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int d)
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{
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int x;
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x = line1[i - 3] * a;
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x += line1[i - 2] * b;
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x += line1[i - 1] * c;
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x += line1[i - 0] * d;
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x += line2[i + 0] * d;
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x += line2[i + 1] * c;
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x += line2[i + 2] * b;
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x += line2[i + 3] * a;
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return (x + 16) >> 5;
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}
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static void
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reconstruct_single (GstIvtc * ivtc, GstVideoFrame * dest_frame, int i1)
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{
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int j;
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int k;
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int height;
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int width;
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GstIvtcField *field = &ivtc->fields[i1];
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for (k = 0; k < 1; k++) {
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height = GST_VIDEO_FRAME_COMP_HEIGHT (dest_frame, k);
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width = GST_VIDEO_FRAME_COMP_WIDTH (dest_frame, k);
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for (j = 0; j < height; j++) {
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if ((j & 1) == field->parity) {
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memcpy (GET_LINE (dest_frame, k, j),
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GET_LINE (&field->frame, k, j), width);
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} else {
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if (j == 0 || j == height - 1) {
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memcpy (GET_LINE (dest_frame, k, j),
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GET_LINE (&field->frame, k, (j ^ 1)), width);
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} else {
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guint8 *dest = GET_LINE (dest_frame, k, j);
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guint8 *line1 = GET_LINE (&field->frame, k, j - 1);
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guint8 *line2 = GET_LINE (&field->frame, k, j + 1);
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int i;
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#define MARGIN 3
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for (i = MARGIN; i < width - MARGIN; i++) {
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int dx, dy;
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dx = -line1[i - 1] - line2[i - 1] + line1[i + 1] + line2[i + 1];
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dx *= 2;
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dy = -line1[i - 1] - 2 * line1[i] - line1[i + 1]
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+ line2[i - 1] + 2 * line2[i] + line2[i + 1];
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if (dy < 0) {
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dy = -dy;
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dx = -dx;
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}
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if (dx == 0 && dy == 0) {
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dest[i] = (line1[i] + line2[i] + 1) >> 1;
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} else if (dx < 0) {
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if (dx < -2 * dy) {
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dest[i] = reconstruct_line (line1, line2, i, 0, 0, 0, 16);
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} else if (dx < -dy) {
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dest[i] = reconstruct_line (line1, line2, i, 0, 0, 8, 8);
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} else if (2 * dx < -dy) {
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dest[i] = reconstruct_line (line1, line2, i, 0, 4, 8, 4);
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} else if (3 * dx < -dy) {
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dest[i] = reconstruct_line (line1, line2, i, 1, 7, 7, 1);
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} else {
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dest[i] = reconstruct_line (line1, line2, i, 4, 8, 4, 0);
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}
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} else {
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if (dx > 2 * dy) {
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dest[i] = reconstruct_line (line2, line1, i, 0, 0, 0, 16);
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} else if (dx > dy) {
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dest[i] = reconstruct_line (line2, line1, i, 0, 0, 8, 8);
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} else if (2 * dx > dy) {
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dest[i] = reconstruct_line (line2, line1, i, 0, 4, 8, 4);
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} else if (3 * dx > dy) {
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dest[i] = reconstruct_line (line2, line1, i, 1, 7, 7, 1);
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} else {
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dest[i] = reconstruct_line (line2, line1, i, 4, 8, 4, 0);
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}
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}
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}
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for (i = 0; i < MARGIN; i++) {
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dest[i] = (line1[i] + line2[i] + 1) >> 1;
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}
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for (i = width - MARGIN; i < width; i++) {
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dest[i] = (line1[i] + line2[i] + 1) >> 1;
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}
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}
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}
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}
|
|
}
|
|
for (k = 1; k < 3; k++) {
|
|
height = GST_VIDEO_FRAME_COMP_HEIGHT (dest_frame, k);
|
|
width = GST_VIDEO_FRAME_COMP_WIDTH (dest_frame, k);
|
|
for (j = 0; j < height; j++) {
|
|
if ((j & 1) == field->parity) {
|
|
memcpy (GET_LINE (dest_frame, k, j),
|
|
GET_LINE (&field->frame, k, j), width);
|
|
} else {
|
|
if (j == 0 || j == height - 1) {
|
|
memcpy (GET_LINE (dest_frame, k, j),
|
|
GET_LINE (&field->frame, k, (j ^ 1)), width);
|
|
} else {
|
|
guint8 *dest = GET_LINE (dest_frame, k, j);
|
|
guint8 *line1 = GET_LINE (&field->frame, k, j - 1);
|
|
guint8 *line2 = GET_LINE (&field->frame, k, j + 1);
|
|
int i;
|
|
for (i = 0; i < width; i++) {
|
|
dest[i] = (line1[i] + line2[i] + 1) >> 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_ivtc_retire_fields (GstIvtc * ivtc, int n_fields)
|
|
{
|
|
int i;
|
|
|
|
if (n_fields == 0)
|
|
return;
|
|
|
|
for (i = 0; i < n_fields; i++) {
|
|
gst_video_frame_unmap (&ivtc->fields[i].frame);
|
|
gst_buffer_unref (ivtc->fields[i].buffer);
|
|
}
|
|
|
|
memmove (ivtc->fields, ivtc->fields + n_fields,
|
|
sizeof (GstIvtcField) * (ivtc->n_fields - n_fields));
|
|
ivtc->n_fields -= n_fields;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_ivtc_transform (GstBaseTransform * trans, GstBuffer * inbuf,
|
|
GstBuffer * outbuf)
|
|
{
|
|
GstIvtc *ivtc = GST_IVTC (trans);
|
|
GstFlowReturn ret;
|
|
|
|
GST_DEBUG_OBJECT (ivtc, "transform");
|
|
|
|
if (GST_BUFFER_FLAG_IS_SET (inbuf, GST_VIDEO_BUFFER_FLAG_TFF)) {
|
|
add_field (ivtc, inbuf, TOP_FIELD, 0);
|
|
if (!GST_BUFFER_FLAG_IS_SET (inbuf, GST_VIDEO_BUFFER_FLAG_ONEFIELD)) {
|
|
add_field (ivtc, inbuf, BOTTOM_FIELD, 1);
|
|
if (GST_BUFFER_FLAG_IS_SET (inbuf, GST_VIDEO_BUFFER_FLAG_RFF)) {
|
|
add_field (ivtc, inbuf, TOP_FIELD, 2);
|
|
}
|
|
}
|
|
} else {
|
|
add_field (ivtc, inbuf, BOTTOM_FIELD, 0);
|
|
if (!GST_BUFFER_FLAG_IS_SET (inbuf, GST_VIDEO_BUFFER_FLAG_ONEFIELD)) {
|
|
add_field (ivtc, inbuf, TOP_FIELD, 1);
|
|
if (GST_BUFFER_FLAG_IS_SET (inbuf, GST_VIDEO_BUFFER_FLAG_RFF)) {
|
|
add_field (ivtc, inbuf, BOTTOM_FIELD, 2);
|
|
}
|
|
}
|
|
}
|
|
|
|
while (ivtc->n_fields > 0 &&
|
|
ivtc->fields[0].ts + GST_MSECOND * 50 < ivtc->current_ts) {
|
|
GST_DEBUG ("retiring early field");
|
|
gst_ivtc_retire_fields (ivtc, 1);
|
|
}
|
|
|
|
GST_DEBUG ("n_fields %d", ivtc->n_fields);
|
|
if (ivtc->n_fields < 4) {
|
|
return GST_BASE_TRANSFORM_FLOW_DROPPED;
|
|
}
|
|
|
|
gst_ivtc_construct_frame (ivtc, outbuf);
|
|
while (ivtc->n_fields >= 4) {
|
|
GstBuffer *buf;
|
|
buf = gst_buffer_copy (outbuf);
|
|
GST_DEBUG ("pushing extra frame");
|
|
ret = gst_pad_push (GST_BASE_TRANSFORM_SRC_PAD (trans), buf);
|
|
if (ret != GST_FLOW_OK) {
|
|
return ret;
|
|
}
|
|
|
|
gst_ivtc_construct_frame (ivtc, outbuf);
|
|
}
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
static void
|
|
gst_ivtc_construct_frame (GstIvtc * ivtc, GstBuffer * outbuf)
|
|
{
|
|
int anchor_index;
|
|
int prev_score, next_score;
|
|
GstVideoFrame dest_frame;
|
|
int n_retire;
|
|
gboolean forward_ok;
|
|
|
|
anchor_index = 1;
|
|
if (ivtc->fields[anchor_index].ts < ivtc->current_ts) {
|
|
forward_ok = TRUE;
|
|
} else {
|
|
forward_ok = FALSE;
|
|
}
|
|
|
|
prev_score = similarity (ivtc, anchor_index - 1, anchor_index);
|
|
next_score = similarity (ivtc, anchor_index, anchor_index + 1);
|
|
|
|
gst_video_frame_map (&dest_frame, &ivtc->src_video_info, outbuf,
|
|
GST_MAP_WRITE);
|
|
|
|
#define THRESHOLD 100
|
|
if (prev_score < THRESHOLD) {
|
|
if (forward_ok && next_score < prev_score) {
|
|
reconstruct (ivtc, &dest_frame, anchor_index, anchor_index + 1);
|
|
n_retire = anchor_index + 2;
|
|
} else {
|
|
if (prev_score >= THRESHOLD / 2) {
|
|
GST_INFO ("borderline prev (%d, %d)", prev_score, next_score);
|
|
}
|
|
reconstruct (ivtc, &dest_frame, anchor_index, anchor_index - 1);
|
|
n_retire = anchor_index + 1;
|
|
}
|
|
} else if (next_score < THRESHOLD) {
|
|
if (next_score >= THRESHOLD / 2) {
|
|
GST_INFO ("borderline prev (%d, %d)", prev_score, next_score);
|
|
}
|
|
reconstruct (ivtc, &dest_frame, anchor_index, anchor_index + 1);
|
|
if (forward_ok) {
|
|
n_retire = anchor_index + 2;
|
|
} else {
|
|
n_retire = anchor_index + 1;
|
|
}
|
|
} else {
|
|
if (prev_score < THRESHOLD * 2 || next_score < THRESHOLD * 2) {
|
|
GST_INFO ("borderline single (%d, %d)", prev_score, next_score);
|
|
}
|
|
reconstruct_single (ivtc, &dest_frame, anchor_index);
|
|
n_retire = anchor_index + 1;
|
|
}
|
|
|
|
GST_DEBUG ("retiring %d", n_retire);
|
|
gst_ivtc_retire_fields (ivtc, n_retire);
|
|
|
|
gst_video_frame_unmap (&dest_frame);
|
|
|
|
GST_BUFFER_PTS (outbuf) = ivtc->current_ts;
|
|
GST_BUFFER_DTS (outbuf) = ivtc->current_ts;
|
|
/* FIXME this is not how to produce durations */
|
|
GST_BUFFER_DURATION (outbuf) = gst_util_uint64_scale (GST_SECOND,
|
|
ivtc->src_video_info.fps_d, ivtc->src_video_info.fps_n);
|
|
GST_BUFFER_FLAG_UNSET (outbuf, GST_VIDEO_BUFFER_FLAG_INTERLACED |
|
|
GST_VIDEO_BUFFER_FLAG_TFF | GST_VIDEO_BUFFER_FLAG_RFF |
|
|
GST_VIDEO_BUFFER_FLAG_ONEFIELD);
|
|
ivtc->current_ts += GST_BUFFER_DURATION (outbuf);
|
|
|
|
}
|
|
|
|
static int
|
|
get_comb_score (GstVideoFrame * top, GstVideoFrame * bottom)
|
|
{
|
|
int j;
|
|
int thisline[MAX_WIDTH];
|
|
int score = 0;
|
|
int height;
|
|
int width;
|
|
int k;
|
|
|
|
height = GST_VIDEO_FRAME_COMP_HEIGHT (top, 0);
|
|
width = GST_VIDEO_FRAME_COMP_WIDTH (top, 0);
|
|
|
|
memset (thisline, 0, sizeof (thisline));
|
|
|
|
k = 0;
|
|
/* remove a few lines from top and bottom, as they sometimes contain
|
|
* artifacts */
|
|
for (j = 2; j < height - 2; j++) {
|
|
guint8 *src1 = GET_LINE_IL (top, bottom, 0, j - 1);
|
|
guint8 *src2 = GET_LINE_IL (top, bottom, 0, j);
|
|
guint8 *src3 = GET_LINE_IL (top, bottom, 0, j + 1);
|
|
int i;
|
|
|
|
for (i = 0; i < width; i++) {
|
|
if (src2[i] < MIN (src1[i], src3[i]) - 5 ||
|
|
src2[i] > MAX (src1[i], src3[i]) + 5) {
|
|
if (i > 0) {
|
|
thisline[i] += thisline[i - 1];
|
|
}
|
|
thisline[i]++;
|
|
if (thisline[i] > 1000)
|
|
thisline[i] = 1000;
|
|
} else {
|
|
thisline[i] = 0;
|
|
}
|
|
if (thisline[i] > 100) {
|
|
score++;
|
|
}
|
|
}
|
|
}
|
|
|
|
GST_DEBUG ("score %d", score);
|
|
|
|
return score;
|
|
}
|
|
|
|
|
|
|
|
static gboolean
|
|
plugin_init (GstPlugin * plugin)
|
|
{
|
|
gst_element_register (plugin, "ivtc", GST_RANK_NONE, GST_TYPE_IVTC);
|
|
gst_element_register (plugin, "combdetect", GST_RANK_NONE,
|
|
GST_TYPE_COMB_DETECT);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
|
|
GST_VERSION_MINOR,
|
|
ivtc,
|
|
"Inverse Telecine",
|
|
plugin_init, VERSION, "LGPL", PACKAGE_NAME, GST_PACKAGE_ORIGIN)
|