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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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Currently supporting timescale, timestamps, font, size, textColor, backColor, plain, bold and italic Fixes #603357
1888 lines
54 KiB
C
1888 lines
54 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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* Copyright (C) 2004 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
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* Copyright (C) 2006 Tim-Philipp Müller <tim centricular net>
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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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <glib.h>
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#include "gstsubparse.h"
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#include "gstssaparse.h"
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#include "samiparse.h"
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#include "tmplayerparse.h"
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#include "mpl2parse.h"
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#include "qttextparse.h"
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GST_DEBUG_CATEGORY (sub_parse_debug);
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#define DEFAULT_ENCODING NULL
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enum
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{
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PROP_0,
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PROP_ENCODING,
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PROP_VIDEOFPS
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};
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static void
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gst_sub_parse_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void
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gst_sub_parse_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static const GstElementDetails sub_parse_details =
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GST_ELEMENT_DETAILS ("Subtitle parser",
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"Codec/Parser/Subtitle",
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"Parses subtitle (.sub) files into text streams",
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"Gustavo J. A. M. Carneiro <gjc@inescporto.pt>\n"
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"GStreamer maintainers <gstreamer-devel@lists.sourceforge.net>");
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#ifndef GST_DISABLE_XML
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static GstStaticPadTemplate sink_templ = 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 ("application/x-subtitle; application/x-subtitle-sami; "
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"application/x-subtitle-tmplayer; application/x-subtitle-mpl2; "
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"application/x-subtitle-dks; application/x-subtitle-qttext")
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);
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#else
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static GstStaticPadTemplate sink_templ = 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 ("application/x-subtitle; application/x-subtitle-dks; "
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"application/x-subtitle-tmplayer; application/x-subtitle-mpl2; "
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"application/x-subtitle-qttext")
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);
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#endif
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static GstStaticPadTemplate src_templ = 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 ("text/plain; text/x-pango-markup")
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);
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static void gst_sub_parse_base_init (GstSubParseClass * klass);
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static void gst_sub_parse_class_init (GstSubParseClass * klass);
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static void gst_sub_parse_init (GstSubParse * subparse);
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static gboolean gst_sub_parse_src_event (GstPad * pad, GstEvent * event);
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static gboolean gst_sub_parse_src_query (GstPad * pad, GstQuery * query);
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static gboolean gst_sub_parse_sink_event (GstPad * pad, GstEvent * event);
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static GstStateChangeReturn gst_sub_parse_change_state (GstElement * element,
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GstStateChange transition);
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static GstFlowReturn gst_sub_parse_chain (GstPad * sinkpad, GstBuffer * buf);
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static GstElementClass *parent_class = NULL;
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GType
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gst_sub_parse_get_type (void)
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{
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static GType sub_parse_type = 0;
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if (!sub_parse_type) {
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static const GTypeInfo sub_parse_info = {
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sizeof (GstSubParseClass),
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(GBaseInitFunc) gst_sub_parse_base_init,
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NULL,
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(GClassInitFunc) gst_sub_parse_class_init,
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NULL,
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NULL,
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sizeof (GstSubParse),
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0,
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(GInstanceInitFunc) gst_sub_parse_init,
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};
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sub_parse_type = g_type_register_static (GST_TYPE_ELEMENT,
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"GstSubParse", &sub_parse_info, 0);
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}
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return sub_parse_type;
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}
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static void
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gst_sub_parse_base_init (GstSubParseClass * klass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&sink_templ));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&src_templ));
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gst_element_class_set_details (element_class, &sub_parse_details);
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}
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static void
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gst_sub_parse_dispose (GObject * object)
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{
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GstSubParse *subparse = GST_SUBPARSE (object);
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GST_DEBUG_OBJECT (subparse, "cleaning up subtitle parser");
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switch (subparse->parser_type) {
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case GST_SUB_PARSE_FORMAT_QTTEXT:
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qttext_context_deinit (&subparse->state);
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break;
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#ifndef GST_DISABLE_XML
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case GST_SUB_PARSE_FORMAT_SAMI:
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sami_context_deinit (&subparse->state);
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break;
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#endif
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default:
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break;
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}
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if (subparse->encoding) {
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g_free (subparse->encoding);
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subparse->encoding = NULL;
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}
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if (subparse->detected_encoding) {
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g_free (subparse->detected_encoding);
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subparse->detected_encoding = NULL;
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}
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if (subparse->adapter) {
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g_object_unref (subparse->adapter);
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subparse->adapter = NULL;
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}
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if (subparse->textbuf) {
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g_string_free (subparse->textbuf, TRUE);
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subparse->textbuf = NULL;
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}
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GST_CALL_PARENT (G_OBJECT_CLASS, dispose, (object));
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}
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static void
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gst_sub_parse_class_init (GstSubParseClass * klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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parent_class = g_type_class_peek_parent (klass);
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object_class->dispose = gst_sub_parse_dispose;
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object_class->set_property = gst_sub_parse_set_property;
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object_class->get_property = gst_sub_parse_get_property;
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element_class->change_state = gst_sub_parse_change_state;
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g_object_class_install_property (object_class, PROP_ENCODING,
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g_param_spec_string ("subtitle-encoding", "subtitle charset encoding",
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"Encoding to assume if input subtitles are not in UTF-8 or any other "
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"Unicode encoding. If not set, the GST_SUBTITLE_ENCODING environment "
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"variable will be checked for an encoding to use. If that is not set "
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"either, ISO-8859-15 will be assumed.", DEFAULT_ENCODING,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (object_class, PROP_VIDEOFPS,
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gst_param_spec_fraction ("video-fps", "Video framerate",
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"Framerate of the video stream. This is needed by some subtitle "
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"formats to synchronize subtitles and video properly. If not set "
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"and the subtitle format requires it subtitles may be out of sync.",
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0, 1, G_MAXINT, 1, 24000, 1001, G_PARAM_READWRITE));
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}
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static void
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gst_sub_parse_init (GstSubParse * subparse)
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{
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subparse->sinkpad = gst_pad_new_from_static_template (&sink_templ, "sink");
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gst_pad_set_chain_function (subparse->sinkpad,
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GST_DEBUG_FUNCPTR (gst_sub_parse_chain));
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gst_pad_set_event_function (subparse->sinkpad,
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GST_DEBUG_FUNCPTR (gst_sub_parse_sink_event));
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gst_element_add_pad (GST_ELEMENT (subparse), subparse->sinkpad);
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subparse->srcpad = gst_pad_new_from_static_template (&src_templ, "src");
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gst_pad_set_event_function (subparse->srcpad,
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GST_DEBUG_FUNCPTR (gst_sub_parse_src_event));
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gst_pad_set_query_function (subparse->srcpad,
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GST_DEBUG_FUNCPTR (gst_sub_parse_src_query));
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gst_element_add_pad (GST_ELEMENT (subparse), subparse->srcpad);
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subparse->textbuf = g_string_new (NULL);
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subparse->parser_type = GST_SUB_PARSE_FORMAT_UNKNOWN;
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subparse->flushing = FALSE;
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gst_segment_init (&subparse->segment, GST_FORMAT_TIME);
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subparse->need_segment = TRUE;
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subparse->encoding = g_strdup (DEFAULT_ENCODING);
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subparse->detected_encoding = NULL;
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subparse->adapter = gst_adapter_new ();
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subparse->fps_n = 24000;
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subparse->fps_d = 1001;
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}
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/*
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* Source pad functions.
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*/
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static gboolean
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gst_sub_parse_src_query (GstPad * pad, GstQuery * query)
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{
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GstSubParse *self = GST_SUBPARSE (gst_pad_get_parent (pad));
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gboolean ret = FALSE;
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GST_DEBUG ("Handling %s query", GST_QUERY_TYPE_NAME (query));
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switch (GST_QUERY_TYPE (query)) {
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case GST_QUERY_POSITION:{
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GstFormat fmt;
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gst_query_parse_position (query, &fmt, NULL);
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if (fmt != GST_FORMAT_TIME) {
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ret = gst_pad_peer_query (self->sinkpad, query);
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} else {
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ret = TRUE;
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gst_query_set_position (query, GST_FORMAT_TIME,
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self->segment.last_stop);
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}
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}
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case GST_QUERY_SEEKING:
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{
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GstFormat fmt;
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gboolean seekable = FALSE;
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ret = TRUE;
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gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
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if (fmt == GST_FORMAT_TIME) {
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GstQuery *peerquery = gst_query_new_seeking (GST_FORMAT_BYTES);
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seekable = gst_pad_peer_query (self->sinkpad, peerquery);
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if (seekable)
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gst_query_parse_seeking (peerquery, NULL, &seekable, NULL, NULL);
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gst_query_unref (peerquery);
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}
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gst_query_set_seeking (query, fmt, seekable, seekable ? 0 : -1, -1);
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break;
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}
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default:
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ret = gst_pad_peer_query (self->sinkpad, query);
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break;
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}
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gst_object_unref (self);
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return ret;
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}
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static gboolean
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gst_sub_parse_src_event (GstPad * pad, GstEvent * event)
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{
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GstSubParse *self = GST_SUBPARSE (gst_pad_get_parent (pad));
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gboolean ret = FALSE;
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GST_DEBUG ("Handling %s event", GST_EVENT_TYPE_NAME (event));
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_SEEK:
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{
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GstFormat format;
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GstSeekType start_type, stop_type;
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gint64 start, stop;
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gdouble rate;
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gboolean update;
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gst_event_parse_seek (event, &rate, &format, &self->segment_flags,
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&start_type, &start, &stop_type, &stop);
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if (format != GST_FORMAT_TIME) {
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GST_WARNING_OBJECT (self, "we only support seeking in TIME format");
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gst_event_unref (event);
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goto beach;
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}
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/* Convert that seek to a seeking in bytes at position 0,
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FIXME: could use an index */
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ret = gst_pad_push_event (self->sinkpad,
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gst_event_new_seek (rate, GST_FORMAT_BYTES, self->segment_flags,
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GST_SEEK_TYPE_SET, 0, GST_SEEK_TYPE_NONE, 0));
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if (ret) {
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/* Apply the seek to our segment */
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gst_segment_set_seek (&self->segment, rate, format, self->segment_flags,
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start_type, start, stop_type, stop, &update);
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GST_DEBUG_OBJECT (self, "segment after seek: %" GST_SEGMENT_FORMAT,
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&self->segment);
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self->next_offset = 0;
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self->need_segment = TRUE;
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} else {
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GST_WARNING_OBJECT (self, "seek to 0 bytes failed");
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}
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gst_event_unref (event);
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break;
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}
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default:
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ret = gst_pad_event_default (pad, event);
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break;
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}
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beach:
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gst_object_unref (self);
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return ret;
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}
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static void
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gst_sub_parse_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstSubParse *subparse = GST_SUBPARSE (object);
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GST_OBJECT_LOCK (subparse);
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switch (prop_id) {
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case PROP_ENCODING:
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g_free (subparse->encoding);
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subparse->encoding = g_value_dup_string (value);
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GST_LOG_OBJECT (object, "subtitle encoding set to %s",
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GST_STR_NULL (subparse->encoding));
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break;
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case PROP_VIDEOFPS:
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{
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subparse->fps_n = gst_value_get_fraction_numerator (value);
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subparse->fps_d = gst_value_get_fraction_denominator (value);
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GST_DEBUG_OBJECT (object, "video framerate set to %d/%d", subparse->fps_n,
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subparse->fps_d);
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if (!subparse->state.have_internal_fps) {
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subparse->state.fps_n = subparse->fps_n;
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subparse->state.fps_d = subparse->fps_d;
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}
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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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GST_OBJECT_UNLOCK (subparse);
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}
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static void
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gst_sub_parse_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstSubParse *subparse = GST_SUBPARSE (object);
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GST_OBJECT_LOCK (subparse);
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switch (prop_id) {
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case PROP_ENCODING:
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g_value_set_string (value, subparse->encoding);
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break;
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case PROP_VIDEOFPS:
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gst_value_set_fraction (value, subparse->fps_n, subparse->fps_d);
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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_OBJECT_UNLOCK (subparse);
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}
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static gchar *
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gst_sub_parse_get_format_description (GstSubParseFormat format)
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{
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switch (format) {
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case GST_SUB_PARSE_FORMAT_MDVDSUB:
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return "MicroDVD";
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case GST_SUB_PARSE_FORMAT_SUBRIP:
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return "SubRip";
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case GST_SUB_PARSE_FORMAT_MPSUB:
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return "MPSub";
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case GST_SUB_PARSE_FORMAT_SAMI:
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return "SAMI";
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case GST_SUB_PARSE_FORMAT_TMPLAYER:
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return "TMPlayer";
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case GST_SUB_PARSE_FORMAT_MPL2:
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return "MPL2";
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case GST_SUB_PARSE_FORMAT_SUBVIEWER:
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return "SubViewer";
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case GST_SUB_PARSE_FORMAT_DKS:
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return "DKS";
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case GST_SUB_PARSE_FORMAT_QTTEXT:
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return "QTtext";
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default:
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case GST_SUB_PARSE_FORMAT_UNKNOWN:
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break;
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}
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return NULL;
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}
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|
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static gchar *
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gst_convert_to_utf8 (const gchar * str, gsize len, const gchar * encoding,
|
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gsize * consumed, GError ** err)
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{
|
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gchar *ret = NULL;
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|
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*consumed = 0;
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ret =
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g_convert_with_fallback (str, len, "UTF-8", encoding, "*", consumed, NULL,
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err);
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if (ret == NULL)
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return ret;
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|
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/* + 3 to skip UTF-8 BOM if it was added */
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len = strlen (ret);
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if (len >= 3 && (guint8) ret[0] == 0xEF && (guint8) ret[1] == 0xBB
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&& (guint8) ret[2] == 0xBF)
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g_memmove (ret, ret + 3, len + 1 - 3);
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|
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return ret;
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}
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|
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static gchar *
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detect_encoding (const gchar * str, gsize len)
|
|
{
|
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if (len >= 3 && (guint8) str[0] == 0xEF && (guint8) str[1] == 0xBB
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&& (guint8) str[2] == 0xBF)
|
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return g_strdup ("UTF-8");
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|
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if (len >= 2 && (guint8) str[0] == 0xFE && (guint8) str[1] == 0xFF)
|
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return g_strdup ("UTF-16BE");
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|
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if (len >= 2 && (guint8) str[0] == 0xFF && (guint8) str[1] == 0xFE)
|
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return g_strdup ("UTF-16LE");
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|
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if (len >= 4 && (guint8) str[0] == 0x00 && (guint8) str[1] == 0x00
|
|
&& (guint8) str[2] == 0xFE && (guint8) str[3] == 0xFF)
|
|
return g_strdup ("UTF-32BE");
|
|
|
|
if (len >= 4 && (guint8) str[0] == 0xFF && (guint8) str[1] == 0xFE
|
|
&& (guint8) str[2] == 0x00 && (guint8) str[3] == 0x00)
|
|
return g_strdup ("UTF-32LE");
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static gchar *
|
|
convert_encoding (GstSubParse * self, const gchar * str, gsize len,
|
|
gsize * consumed)
|
|
{
|
|
const gchar *encoding;
|
|
GError *err = NULL;
|
|
gchar *ret = NULL;
|
|
|
|
*consumed = 0;
|
|
|
|
/* First try any detected encoding */
|
|
if (self->detected_encoding) {
|
|
ret =
|
|
gst_convert_to_utf8 (str, len, self->detected_encoding, consumed, &err);
|
|
|
|
if (!err)
|
|
return ret;
|
|
|
|
GST_WARNING_OBJECT (self, "could not convert string from '%s' to UTF-8: %s",
|
|
self->detected_encoding, err->message);
|
|
g_free (self->detected_encoding);
|
|
self->detected_encoding = NULL;
|
|
g_error_free (err);
|
|
}
|
|
|
|
/* Otherwise check if it's UTF8 */
|
|
if (self->valid_utf8) {
|
|
if (g_utf8_validate (str, len, NULL)) {
|
|
GST_LOG_OBJECT (self, "valid UTF-8, no conversion needed");
|
|
*consumed = len;
|
|
return g_strndup (str, len);
|
|
}
|
|
GST_INFO_OBJECT (self, "invalid UTF-8!");
|
|
self->valid_utf8 = FALSE;
|
|
}
|
|
|
|
/* Else try fallback */
|
|
encoding = self->encoding;
|
|
if (encoding == NULL || *encoding == '\0') {
|
|
encoding = g_getenv ("GST_SUBTITLE_ENCODING");
|
|
}
|
|
if (encoding == NULL || *encoding == '\0') {
|
|
/* if local encoding is UTF-8 and no encoding specified
|
|
* via the environment variable, assume ISO-8859-15 */
|
|
if (g_get_charset (&encoding)) {
|
|
encoding = "ISO-8859-15";
|
|
}
|
|
}
|
|
|
|
ret = gst_convert_to_utf8 (str, len, encoding, consumed, &err);
|
|
|
|
if (err) {
|
|
GST_WARNING_OBJECT (self, "could not convert string from '%s' to UTF-8: %s",
|
|
encoding, err->message);
|
|
g_error_free (err);
|
|
|
|
/* invalid input encoding, fall back to ISO-8859-15 (always succeeds) */
|
|
ret = gst_convert_to_utf8 (str, len, "ISO-8859-15", consumed, NULL);
|
|
}
|
|
|
|
GST_LOG_OBJECT (self,
|
|
"successfully converted %" G_GSIZE_FORMAT " characters from %s to UTF-8"
|
|
"%s", len, encoding, (err) ? " , using ISO-8859-15 as fallback" : "");
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gchar *
|
|
get_next_line (GstSubParse * self)
|
|
{
|
|
char *line = NULL;
|
|
const char *line_end;
|
|
int line_len;
|
|
gboolean have_r = FALSE;
|
|
|
|
line_end = strchr (self->textbuf->str, '\n');
|
|
|
|
if (!line_end) {
|
|
/* end-of-line not found; return for more data */
|
|
return NULL;
|
|
}
|
|
|
|
/* get rid of '\r' */
|
|
if (line_end != self->textbuf->str && *(line_end - 1) == '\r') {
|
|
line_end--;
|
|
have_r = TRUE;
|
|
}
|
|
|
|
line_len = line_end - self->textbuf->str;
|
|
line = g_strndup (self->textbuf->str, line_len);
|
|
self->textbuf = g_string_erase (self->textbuf, 0,
|
|
line_len + (have_r ? 2 : 1));
|
|
return line;
|
|
}
|
|
|
|
static gchar *
|
|
parse_mdvdsub (ParserState * state, const gchar * line)
|
|
{
|
|
const gchar *line_split;
|
|
gchar *line_chunk;
|
|
guint start_frame, end_frame;
|
|
gint64 clip_start = 0, clip_stop = 0;
|
|
gboolean in_seg = FALSE;
|
|
GString *markup;
|
|
gchar *ret;
|
|
|
|
/* style variables */
|
|
gboolean italic;
|
|
gboolean bold;
|
|
guint fontsize;
|
|
gdouble fps = 0.0;
|
|
|
|
if (sscanf (line, "{%u}{%u}", &start_frame, &end_frame) != 2) {
|
|
g_warning ("Parse of the following line, assumed to be in microdvd .sub"
|
|
" format, failed:\n%s", line);
|
|
return NULL;
|
|
}
|
|
|
|
/* skip the {%u}{%u} part */
|
|
line = strchr (line, '}') + 1;
|
|
line = strchr (line, '}') + 1;
|
|
|
|
/* see if there's a first line with a framerate */
|
|
if (start_frame == 1 && end_frame == 1) {
|
|
gchar *rest, *end = NULL;
|
|
|
|
rest = g_strdup (line);
|
|
g_strdelimit (rest, ",", '.');
|
|
fps = g_ascii_strtod (rest, &end);
|
|
if (end != rest) {
|
|
gst_util_double_to_fraction (fps, &state->fps_n, &state->fps_d);
|
|
GST_INFO ("framerate from file: %d/%d ('%s')", state->fps_n,
|
|
state->fps_d, rest);
|
|
}
|
|
g_free (rest);
|
|
return NULL;
|
|
}
|
|
|
|
state->start_time =
|
|
gst_util_uint64_scale (start_frame, GST_SECOND * state->fps_d,
|
|
state->fps_n);
|
|
state->duration =
|
|
gst_util_uint64_scale (end_frame - start_frame, GST_SECOND * state->fps_d,
|
|
state->fps_n);
|
|
|
|
/* Check our segment start/stop */
|
|
in_seg = gst_segment_clip (state->segment, GST_FORMAT_TIME,
|
|
state->start_time, state->start_time + state->duration, &clip_start,
|
|
&clip_stop);
|
|
|
|
/* No need to parse that text if it's out of segment */
|
|
if (in_seg) {
|
|
state->start_time = clip_start;
|
|
state->duration = clip_stop - clip_start;
|
|
} else {
|
|
return NULL;
|
|
}
|
|
|
|
markup = g_string_new (NULL);
|
|
while (1) {
|
|
italic = FALSE;
|
|
bold = FALSE;
|
|
fontsize = 0;
|
|
/* parse style markup */
|
|
if (strncmp (line, "{y:i}", 5) == 0) {
|
|
italic = TRUE;
|
|
line = strchr (line, '}') + 1;
|
|
}
|
|
if (strncmp (line, "{y:b}", 5) == 0) {
|
|
bold = TRUE;
|
|
line = strchr (line, '}') + 1;
|
|
}
|
|
if (sscanf (line, "{s:%u}", &fontsize) == 1) {
|
|
line = strchr (line, '}') + 1;
|
|
}
|
|
/* forward slashes at beginning/end signify italics too */
|
|
if (g_str_has_prefix (line, "/")) {
|
|
italic = TRUE;
|
|
++line;
|
|
}
|
|
if ((line_split = strchr (line, '|')))
|
|
line_chunk = g_markup_escape_text (line, line_split - line);
|
|
else
|
|
line_chunk = g_markup_escape_text (line, strlen (line));
|
|
|
|
/* Remove italics markers at end of line/stanza (CHECKME: are end slashes
|
|
* always at the end of a line or can they span multiple lines?) */
|
|
if (g_str_has_suffix (line_chunk, "/")) {
|
|
line_chunk[strlen (line_chunk) - 1] = '\0';
|
|
}
|
|
|
|
markup = g_string_append (markup, "<span");
|
|
if (italic)
|
|
g_string_append (markup, " style=\"italic\"");
|
|
if (bold)
|
|
g_string_append (markup, " weight=\"bold\"");
|
|
if (fontsize)
|
|
g_string_append_printf (markup, " size=\"%u\"", fontsize * 1000);
|
|
g_string_append_printf (markup, ">%s</span>", line_chunk);
|
|
g_free (line_chunk);
|
|
if (line_split) {
|
|
g_string_append (markup, "\n");
|
|
line = line_split + 1;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
ret = markup->str;
|
|
g_string_free (markup, FALSE);
|
|
GST_DEBUG ("parse_mdvdsub returning (%f+%f): %s",
|
|
state->start_time / (double) GST_SECOND,
|
|
state->duration / (double) GST_SECOND, ret);
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
strip_trailing_newlines (gchar * txt)
|
|
{
|
|
if (txt) {
|
|
guint len;
|
|
|
|
len = strlen (txt);
|
|
while (len > 1 && txt[len - 1] == '\n') {
|
|
txt[len - 1] = '\0';
|
|
--len;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* we want to escape text in general, but retain basic markup like
|
|
* <i></i>, <u></u>, and <b></b>. The easiest and safest way is to
|
|
* just unescape a white list of allowed markups again after
|
|
* escaping everything (the text between these simple markers isn't
|
|
* necessarily escaped, so it seems best to do it like this) */
|
|
static void
|
|
subrip_unescape_formatting (gchar * txt)
|
|
{
|
|
gchar *pos;
|
|
|
|
for (pos = txt; pos != NULL && *pos != '\0'; ++pos) {
|
|
if (g_ascii_strncasecmp (pos, "<u>", 9) == 0 ||
|
|
g_ascii_strncasecmp (pos, "<i>", 9) == 0 ||
|
|
g_ascii_strncasecmp (pos, "<b>", 9) == 0) {
|
|
pos[0] = '<';
|
|
pos[1] = g_ascii_tolower (pos[4]);
|
|
pos[2] = '>';
|
|
/* move NUL terminator as well */
|
|
g_memmove (pos + 3, pos + 9, strlen (pos + 9) + 1);
|
|
pos += 2;
|
|
}
|
|
}
|
|
|
|
for (pos = txt; pos != NULL && *pos != '\0'; ++pos) {
|
|
if (g_ascii_strncasecmp (pos, "</u>", 10) == 0 ||
|
|
g_ascii_strncasecmp (pos, "</i>", 10) == 0 ||
|
|
g_ascii_strncasecmp (pos, "</b>", 10) == 0) {
|
|
pos[0] = '<';
|
|
pos[1] = '/';
|
|
pos[2] = g_ascii_tolower (pos[5]);
|
|
pos[3] = '>';
|
|
/* move NUL terminator as well */
|
|
g_memmove (pos + 4, pos + 10, strlen (pos + 10) + 1);
|
|
pos += 3;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static gboolean
|
|
subrip_remove_unhandled_tag (gchar * start, gchar * stop)
|
|
{
|
|
gchar *tag, saved;
|
|
|
|
tag = start + strlen ("<");
|
|
if (*tag == '/')
|
|
++tag;
|
|
|
|
if (g_ascii_tolower (*tag) < 'a' || g_ascii_tolower (*tag) > 'z')
|
|
return FALSE;
|
|
|
|
saved = *stop;
|
|
*stop = '\0';
|
|
GST_LOG ("removing unhandled tag '%s'", start);
|
|
*stop = saved;
|
|
g_memmove (start, stop, strlen (stop) + 1);
|
|
return TRUE;
|
|
}
|
|
|
|
/* remove tags we haven't explicitly allowed earlier on, like font tags
|
|
* for example */
|
|
static void
|
|
subrip_remove_unhandled_tags (gchar * txt)
|
|
{
|
|
gchar *pos, *gt;
|
|
|
|
for (pos = txt; pos != NULL && *pos != '\0'; ++pos) {
|
|
if (strncmp (pos, "<", 4) == 0 && (gt = strstr (pos + 4, ">"))) {
|
|
if (subrip_remove_unhandled_tag (pos, gt + strlen (">")))
|
|
--pos;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* we only allow <i>, <u> and <b>, so let's take a simple approach. This code
|
|
* assumes the input has been escaped and subrip_unescape_formatting() has then
|
|
* been run over the input! This function adds missing closing markup tags and
|
|
* removes broken closing tags for tags that have never been opened. */
|
|
static void
|
|
subrip_fix_up_markup (gchar ** p_txt)
|
|
{
|
|
gchar *cur, *next_tag;
|
|
gchar open_tags[32];
|
|
guint num_open_tags = 0;
|
|
|
|
g_assert (*p_txt != NULL);
|
|
|
|
cur = *p_txt;
|
|
while (*cur != '\0') {
|
|
next_tag = strchr (cur, '<');
|
|
if (next_tag == NULL)
|
|
break;
|
|
++next_tag;
|
|
switch (*next_tag) {
|
|
case '/':{
|
|
++next_tag;
|
|
if (num_open_tags == 0 || open_tags[num_open_tags - 1] != *next_tag) {
|
|
GST_LOG ("broken input, closing tag '%c' is not open", *next_tag);
|
|
g_memmove (next_tag - 2, next_tag + 2, strlen (next_tag + 2) + 1);
|
|
next_tag -= 2;
|
|
} else {
|
|
/* it's all good, closing tag which is open */
|
|
--num_open_tags;
|
|
}
|
|
break;
|
|
}
|
|
case 'i':
|
|
case 'b':
|
|
case 'u':
|
|
if (num_open_tags == G_N_ELEMENTS (open_tags))
|
|
return; /* something dodgy is going on, stop parsing */
|
|
open_tags[num_open_tags] = *next_tag;
|
|
++num_open_tags;
|
|
break;
|
|
default:
|
|
GST_ERROR ("unexpected tag '%c' (%s)", *next_tag, next_tag);
|
|
g_assert_not_reached ();
|
|
break;
|
|
}
|
|
cur = next_tag;
|
|
}
|
|
|
|
if (num_open_tags > 0) {
|
|
GString *s;
|
|
|
|
s = g_string_new (*p_txt);
|
|
while (num_open_tags > 0) {
|
|
GST_LOG ("adding missing closing tag '%c'", open_tags[num_open_tags - 1]);
|
|
g_string_append_c (s, '<');
|
|
g_string_append_c (s, '/');
|
|
g_string_append_c (s, open_tags[num_open_tags - 1]);
|
|
g_string_append_c (s, '>');
|
|
--num_open_tags;
|
|
}
|
|
g_free (*p_txt);
|
|
*p_txt = g_string_free (s, FALSE);
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
parse_subrip_time (const gchar * ts_string, GstClockTime * t)
|
|
{
|
|
gchar s[128] = { '\0', };
|
|
gchar *end, *p;
|
|
guint hour, min, sec, msec, len;
|
|
|
|
while (*ts_string == ' ')
|
|
++ts_string;
|
|
|
|
g_strlcpy (s, ts_string, sizeof (s));
|
|
if ((end = strstr (s, "-->")))
|
|
*end = '\0';
|
|
g_strchomp (s);
|
|
|
|
/* ms may be in these formats:
|
|
* hh:mm:ss,500 = 500ms
|
|
* hh:mm:ss, 5 = 5ms
|
|
* hh:mm:ss, 5 = 50ms
|
|
* hh:mm:ss, 50 = 50ms
|
|
* hh:mm:ss,5 = 500ms
|
|
* and the same with . instead of ,.
|
|
* sscanf() doesn't differentiate between ' 5' and '5' so munge
|
|
* the white spaces within the timestamp to '0' (I'm sure there's a
|
|
* way to make sscanf() do this for us, but how?)
|
|
*/
|
|
g_strdelimit (s, " ", '0');
|
|
g_strdelimit (s, ".", ',');
|
|
|
|
/* make sure we have exactly three digits after he comma */
|
|
p = strchr (s, ',');
|
|
g_assert (p != NULL);
|
|
++p;
|
|
len = strlen (p);
|
|
if (len > 3) {
|
|
p[3] = '\0';
|
|
} else
|
|
while (len < 3) {
|
|
g_strlcat (&p[len], "0", 2);
|
|
++len;
|
|
}
|
|
|
|
GST_LOG ("parsing timestamp '%s'", s);
|
|
if (sscanf (s, "%u:%u:%u,%u", &hour, &min, &sec, &msec) != 4) {
|
|
GST_WARNING ("failed to parse subrip timestamp string '%s'", s);
|
|
return FALSE;
|
|
}
|
|
|
|
*t = ((hour * 3600) + (min * 60) + sec) * GST_SECOND + msec * GST_MSECOND;
|
|
return TRUE;
|
|
}
|
|
|
|
static gchar *
|
|
parse_subrip (ParserState * state, const gchar * line)
|
|
{
|
|
int subnum;
|
|
gchar *ret;
|
|
|
|
switch (state->state) {
|
|
case 0:
|
|
/* looking for a single integer */
|
|
if (sscanf (line, "%u", &subnum) == 1)
|
|
state->state = 1;
|
|
return NULL;
|
|
case 1:
|
|
{
|
|
GstClockTime ts_start, ts_end;
|
|
gchar *end_time;
|
|
|
|
/* looking for start_time --> end_time */
|
|
if ((end_time = strstr (line, " --> ")) &&
|
|
parse_subrip_time (line, &ts_start) &&
|
|
parse_subrip_time (end_time + strlen (" --> "), &ts_end) &&
|
|
state->start_time <= ts_end) {
|
|
state->state = 2;
|
|
state->start_time = ts_start;
|
|
state->duration = ts_end - ts_start;
|
|
} else {
|
|
GST_DEBUG ("error parsing subrip time line '%s'", line);
|
|
state->state = 0;
|
|
}
|
|
return NULL;
|
|
}
|
|
case 2:
|
|
{
|
|
/* No need to parse that text if it's out of segment */
|
|
gint64 clip_start = 0, clip_stop = 0;
|
|
gboolean in_seg = FALSE;
|
|
|
|
/* Check our segment start/stop */
|
|
in_seg = gst_segment_clip (state->segment, GST_FORMAT_TIME,
|
|
state->start_time, state->start_time + state->duration,
|
|
&clip_start, &clip_stop);
|
|
|
|
if (in_seg) {
|
|
state->start_time = clip_start;
|
|
state->duration = clip_stop - clip_start;
|
|
} else {
|
|
state->state = 0;
|
|
return NULL;
|
|
}
|
|
}
|
|
/* looking for subtitle text; empty line ends this subtitle entry */
|
|
if (state->buf->len)
|
|
g_string_append_c (state->buf, '\n');
|
|
g_string_append (state->buf, line);
|
|
if (strlen (line) == 0) {
|
|
ret = g_markup_escape_text (state->buf->str, state->buf->len);
|
|
g_string_truncate (state->buf, 0);
|
|
state->state = 0;
|
|
subrip_unescape_formatting (ret);
|
|
subrip_remove_unhandled_tags (ret);
|
|
strip_trailing_newlines (ret);
|
|
subrip_fix_up_markup (&ret);
|
|
return ret;
|
|
}
|
|
return NULL;
|
|
default:
|
|
g_return_val_if_reached (NULL);
|
|
}
|
|
}
|
|
|
|
static void
|
|
unescape_newlines_br (gchar * read)
|
|
{
|
|
gchar *write = read;
|
|
|
|
/* Replace all occurences of '[br]' with a newline as version 2
|
|
* of the subviewer format uses this for newlines */
|
|
|
|
if (read[0] == '\0' || read[1] == '\0' || read[2] == '\0' || read[3] == '\0')
|
|
return;
|
|
|
|
do {
|
|
if (strncmp (read, "[br]", 4) == 0) {
|
|
*write = '\n';
|
|
read += 4;
|
|
} else {
|
|
*write = *read;
|
|
read++;
|
|
}
|
|
write++;
|
|
} while (*read);
|
|
|
|
*write = '\0';
|
|
}
|
|
|
|
static gchar *
|
|
parse_subviewer (ParserState * state, const gchar * line)
|
|
{
|
|
guint h1, m1, s1, ms1;
|
|
guint h2, m2, s2, ms2;
|
|
gchar *ret;
|
|
|
|
/* TODO: Maybe also parse the fields in the header, especially DELAY.
|
|
* For examples see the unit test or
|
|
* http://www.doom9.org/index.html?/sub.htm */
|
|
|
|
switch (state->state) {
|
|
case 0:
|
|
/* looking for start_time,end_time */
|
|
if (sscanf (line, "%u:%u:%u.%u,%u:%u:%u.%u",
|
|
&h1, &m1, &s1, &ms1, &h2, &m2, &s2, &ms2) == 8) {
|
|
state->state = 1;
|
|
state->start_time =
|
|
(((guint64) h1) * 3600 + m1 * 60 + s1) * GST_SECOND +
|
|
ms1 * GST_MSECOND;
|
|
state->duration =
|
|
(((guint64) h2) * 3600 + m2 * 60 + s2) * GST_SECOND +
|
|
ms2 * GST_MSECOND - state->start_time;
|
|
}
|
|
return NULL;
|
|
case 1:
|
|
{
|
|
/* No need to parse that text if it's out of segment */
|
|
gint64 clip_start = 0, clip_stop = 0;
|
|
gboolean in_seg = FALSE;
|
|
|
|
/* Check our segment start/stop */
|
|
in_seg = gst_segment_clip (state->segment, GST_FORMAT_TIME,
|
|
state->start_time, state->start_time + state->duration,
|
|
&clip_start, &clip_stop);
|
|
|
|
if (in_seg) {
|
|
state->start_time = clip_start;
|
|
state->duration = clip_stop - clip_start;
|
|
} else {
|
|
state->state = 0;
|
|
return NULL;
|
|
}
|
|
}
|
|
/* looking for subtitle text; empty line ends this subtitle entry */
|
|
if (state->buf->len)
|
|
g_string_append_c (state->buf, '\n');
|
|
g_string_append (state->buf, line);
|
|
if (strlen (line) == 0) {
|
|
ret = g_strdup (state->buf->str);
|
|
unescape_newlines_br (ret);
|
|
strip_trailing_newlines (ret);
|
|
g_string_truncate (state->buf, 0);
|
|
state->state = 0;
|
|
return ret;
|
|
}
|
|
return NULL;
|
|
default:
|
|
g_assert_not_reached ();
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static gchar *
|
|
parse_mpsub (ParserState * state, const gchar * line)
|
|
{
|
|
gchar *ret;
|
|
float t1, t2;
|
|
|
|
switch (state->state) {
|
|
case 0:
|
|
/* looking for two floats (offset, duration) */
|
|
if (sscanf (line, "%f %f", &t1, &t2) == 2) {
|
|
state->state = 1;
|
|
state->start_time += state->duration + GST_SECOND * t1;
|
|
state->duration = GST_SECOND * t2;
|
|
}
|
|
return NULL;
|
|
case 1:
|
|
{ /* No need to parse that text if it's out of segment */
|
|
gint64 clip_start = 0, clip_stop = 0;
|
|
gboolean in_seg = FALSE;
|
|
|
|
/* Check our segment start/stop */
|
|
in_seg = gst_segment_clip (state->segment, GST_FORMAT_TIME,
|
|
state->start_time, state->start_time + state->duration,
|
|
&clip_start, &clip_stop);
|
|
|
|
if (in_seg) {
|
|
state->start_time = clip_start;
|
|
state->duration = clip_stop - clip_start;
|
|
} else {
|
|
state->state = 0;
|
|
return NULL;
|
|
}
|
|
}
|
|
/* looking for subtitle text; empty line ends this
|
|
* subtitle entry */
|
|
if (state->buf->len)
|
|
g_string_append_c (state->buf, '\n');
|
|
g_string_append (state->buf, line);
|
|
if (strlen (line) == 0) {
|
|
ret = g_strdup (state->buf->str);
|
|
g_string_truncate (state->buf, 0);
|
|
state->state = 0;
|
|
return ret;
|
|
}
|
|
return NULL;
|
|
default:
|
|
g_assert_not_reached ();
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static const gchar *
|
|
dks_skip_timestamp (const gchar * line)
|
|
{
|
|
while (*line && *line != ']')
|
|
line++;
|
|
if (*line == ']')
|
|
line++;
|
|
return line;
|
|
}
|
|
|
|
static gchar *
|
|
parse_dks (ParserState * state, const gchar * line)
|
|
{
|
|
guint h, m, s;
|
|
|
|
switch (state->state) {
|
|
case 0:
|
|
/* Looking for the start time and text */
|
|
if (sscanf (line, "[%u:%u:%u]", &h, &m, &s) == 3) {
|
|
const gchar *text;
|
|
state->start_time = (((guint64) h) * 3600 + m * 60 + s) * GST_SECOND;
|
|
text = dks_skip_timestamp (line);
|
|
if (*text) {
|
|
state->state = 1;
|
|
g_string_append (state->buf, text);
|
|
}
|
|
}
|
|
return NULL;
|
|
case 1:
|
|
{
|
|
gint64 clip_start = 0, clip_stop = 0;
|
|
gboolean in_seg;
|
|
gchar *ret;
|
|
|
|
/* Looking for the end time */
|
|
if (sscanf (line, "[%u:%u:%u]", &h, &m, &s) == 3) {
|
|
state->state = 0;
|
|
state->duration = (((guint64) h) * 3600 + m * 60 + s) * GST_SECOND -
|
|
state->start_time;
|
|
} else {
|
|
GST_WARNING ("Failed to parse subtitle end time");
|
|
return NULL;
|
|
}
|
|
|
|
/* Check if this subtitle is out of the current segment */
|
|
in_seg = gst_segment_clip (state->segment, GST_FORMAT_TIME,
|
|
state->start_time, state->start_time + state->duration,
|
|
&clip_start, &clip_stop);
|
|
|
|
if (!in_seg) {
|
|
return NULL;
|
|
}
|
|
|
|
state->start_time = clip_start;
|
|
state->duration = clip_stop - clip_start;
|
|
|
|
ret = g_strdup (state->buf->str);
|
|
g_string_truncate (state->buf, 0);
|
|
unescape_newlines_br (ret);
|
|
return ret;
|
|
}
|
|
default:
|
|
g_assert_not_reached ();
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static void
|
|
parser_state_init (ParserState * state)
|
|
{
|
|
GST_DEBUG ("initialising parser");
|
|
|
|
if (state->buf) {
|
|
g_string_truncate (state->buf, 0);
|
|
} else {
|
|
state->buf = g_string_new (NULL);
|
|
}
|
|
|
|
state->start_time = 0;
|
|
state->duration = 0;
|
|
state->max_duration = 0; /* no limit */
|
|
state->state = 0;
|
|
state->segment = NULL;
|
|
}
|
|
|
|
static void
|
|
parser_state_dispose (GstSubParse * self, ParserState * state)
|
|
{
|
|
if (state->buf) {
|
|
g_string_free (state->buf, TRUE);
|
|
state->buf = NULL;
|
|
}
|
|
if (state->user_data) {
|
|
switch (self->parser_type) {
|
|
#ifndef GST_DISABLE_XML
|
|
case GST_SUB_PARSE_FORMAT_SAMI:
|
|
sami_context_reset (state);
|
|
break;
|
|
#endif
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* regex type enum */
|
|
typedef enum
|
|
{
|
|
GST_SUB_PARSE_REGEX_UNKNOWN = 0,
|
|
GST_SUB_PARSE_REGEX_MDVDSUB = 1,
|
|
GST_SUB_PARSE_REGEX_SUBRIP = 2,
|
|
GST_SUB_PARSE_REGEX_DKS = 3,
|
|
} GstSubParseRegex;
|
|
|
|
static gpointer
|
|
gst_sub_parse_data_format_autodetect_regex_once (GstSubParseRegex regtype)
|
|
{
|
|
gpointer result = NULL;
|
|
GError *gerr = NULL;
|
|
switch (regtype) {
|
|
case GST_SUB_PARSE_REGEX_MDVDSUB:
|
|
result =
|
|
(gpointer) g_regex_new ("^\\{[0-9]+\\}\\{[0-9]+\\}", 0, 0, &gerr);
|
|
if (result == NULL) {
|
|
g_warning ("Compilation of mdvd regex failed: %s", gerr->message);
|
|
g_error_free (gerr);
|
|
}
|
|
break;
|
|
case GST_SUB_PARSE_REGEX_SUBRIP:
|
|
result = (gpointer) g_regex_new ("^([ 0-9]){0,3}[0-9]\\s*(\x0d)?\x0a"
|
|
"[ 0-9][0-9]:[ 0-9][0-9]:[ 0-9][0-9][,.][ 0-9]{0,2}[0-9]"
|
|
" +--> +([ 0-9])?[0-9]:[ 0-9][0-9]:[ 0-9][0-9][,.][ 0-9]{0,2}[0-9]",
|
|
0, 0, &gerr);
|
|
if (result == NULL) {
|
|
g_warning ("Compilation of subrip regex failed: %s", gerr->message);
|
|
g_error_free (gerr);
|
|
}
|
|
break;
|
|
case GST_SUB_PARSE_REGEX_DKS:
|
|
result = (gpointer) g_regex_new ("^\[[0-9]+:[0-9]+:[0-9]+].*",
|
|
0, 0, &gerr);
|
|
if (result == NULL) {
|
|
g_warning ("Compilation of dks regex failed: %s", gerr->message);
|
|
g_error_free (gerr);
|
|
}
|
|
break;
|
|
default:
|
|
GST_WARNING ("Trying to allocate regex of unknown type %u", regtype);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* FIXME: maybe we should pass along a second argument, the preceding
|
|
* text buffer, because that is how this originally worked, even though
|
|
* I don't really see the use of that.
|
|
*/
|
|
|
|
static GstSubParseFormat
|
|
gst_sub_parse_data_format_autodetect (gchar * match_str)
|
|
{
|
|
guint n1, n2, n3;
|
|
|
|
static GOnce mdvd_rx_once = G_ONCE_INIT;
|
|
static GOnce subrip_rx_once = G_ONCE_INIT;
|
|
static GOnce dks_rx_once = G_ONCE_INIT;
|
|
|
|
GRegex *mdvd_grx;
|
|
GRegex *subrip_grx;
|
|
GRegex *dks_grx;
|
|
|
|
g_once (&mdvd_rx_once,
|
|
(GThreadFunc) gst_sub_parse_data_format_autodetect_regex_once,
|
|
(gpointer) GST_SUB_PARSE_REGEX_MDVDSUB);
|
|
g_once (&subrip_rx_once,
|
|
(GThreadFunc) gst_sub_parse_data_format_autodetect_regex_once,
|
|
(gpointer) GST_SUB_PARSE_REGEX_SUBRIP);
|
|
g_once (&dks_rx_once,
|
|
(GThreadFunc) gst_sub_parse_data_format_autodetect_regex_once,
|
|
(gpointer) GST_SUB_PARSE_REGEX_DKS);
|
|
|
|
mdvd_grx = (GRegex *) mdvd_rx_once.retval;
|
|
subrip_grx = (GRegex *) subrip_rx_once.retval;
|
|
dks_grx = (GRegex *) dks_rx_once.retval;
|
|
|
|
if (g_regex_match (mdvd_grx, match_str, 0, NULL) == TRUE) {
|
|
GST_LOG ("MicroDVD (frame based) format detected");
|
|
return GST_SUB_PARSE_FORMAT_MDVDSUB;
|
|
}
|
|
if (g_regex_match (subrip_grx, match_str, 0, NULL) == TRUE) {
|
|
GST_LOG ("SubRip (time based) format detected");
|
|
return GST_SUB_PARSE_FORMAT_SUBRIP;
|
|
}
|
|
if (g_regex_match (dks_grx, match_str, 0, NULL) == TRUE) {
|
|
GST_LOG ("DKS (time based) format detected");
|
|
return GST_SUB_PARSE_FORMAT_DKS;
|
|
}
|
|
|
|
if (!strncmp (match_str, "FORMAT=TIME", 11)) {
|
|
GST_LOG ("MPSub (time based) format detected");
|
|
return GST_SUB_PARSE_FORMAT_MPSUB;
|
|
}
|
|
#ifndef GST_DISABLE_XML
|
|
if (strstr (match_str, "<SAMI>") != NULL ||
|
|
strstr (match_str, "<sami>") != NULL) {
|
|
GST_LOG ("SAMI (time based) format detected");
|
|
return GST_SUB_PARSE_FORMAT_SAMI;
|
|
}
|
|
#endif
|
|
/* we're boldly assuming the first subtitle appears within the first hour */
|
|
if (sscanf (match_str, "0:%02u:%02u:", &n1, &n2) == 2 ||
|
|
sscanf (match_str, "0:%02u:%02u=", &n1, &n2) == 2 ||
|
|
sscanf (match_str, "00:%02u:%02u:", &n1, &n2) == 2 ||
|
|
sscanf (match_str, "00:%02u:%02u=", &n1, &n2) == 2 ||
|
|
sscanf (match_str, "00:%02u:%02u,%u=", &n1, &n2, &n3) == 3) {
|
|
GST_LOG ("TMPlayer (time based) format detected");
|
|
return GST_SUB_PARSE_FORMAT_TMPLAYER;
|
|
}
|
|
if (sscanf (match_str, "[%u][%u]", &n1, &n2) == 2) {
|
|
GST_LOG ("MPL2 (time based) format detected");
|
|
return GST_SUB_PARSE_FORMAT_MPL2;
|
|
}
|
|
if (strstr (match_str, "[INFORMATION]") != NULL) {
|
|
GST_LOG ("SubViewer (time based) format detected");
|
|
return GST_SUB_PARSE_FORMAT_SUBVIEWER;
|
|
}
|
|
if (strstr (match_str, "{QTtext}") != NULL) {
|
|
GST_LOG ("QTtext (time based) format detected");
|
|
return GST_SUB_PARSE_FORMAT_QTTEXT;
|
|
}
|
|
|
|
GST_DEBUG ("no subtitle format detected");
|
|
return GST_SUB_PARSE_FORMAT_UNKNOWN;
|
|
}
|
|
|
|
static GstCaps *
|
|
gst_sub_parse_format_autodetect (GstSubParse * self)
|
|
{
|
|
gchar *data;
|
|
GstSubParseFormat format;
|
|
|
|
if (strlen (self->textbuf->str) < 30) {
|
|
GST_DEBUG ("File too small to be a subtitles file");
|
|
return NULL;
|
|
}
|
|
|
|
data = g_strndup (self->textbuf->str, 35);
|
|
format = gst_sub_parse_data_format_autodetect (data);
|
|
g_free (data);
|
|
|
|
self->parser_type = format;
|
|
self->subtitle_codec = gst_sub_parse_get_format_description (format);
|
|
parser_state_init (&self->state);
|
|
|
|
switch (format) {
|
|
case GST_SUB_PARSE_FORMAT_MDVDSUB:
|
|
self->parse_line = parse_mdvdsub;
|
|
return gst_caps_new_simple ("text/x-pango-markup", NULL);
|
|
case GST_SUB_PARSE_FORMAT_SUBRIP:
|
|
self->parse_line = parse_subrip;
|
|
return gst_caps_new_simple ("text/x-pango-markup", NULL);
|
|
case GST_SUB_PARSE_FORMAT_MPSUB:
|
|
self->parse_line = parse_mpsub;
|
|
return gst_caps_new_simple ("text/plain", NULL);
|
|
#ifndef GST_DISABLE_XML
|
|
case GST_SUB_PARSE_FORMAT_SAMI:
|
|
self->parse_line = parse_sami;
|
|
sami_context_init (&self->state);
|
|
return gst_caps_new_simple ("text/x-pango-markup", NULL);
|
|
#endif
|
|
case GST_SUB_PARSE_FORMAT_TMPLAYER:
|
|
self->parse_line = parse_tmplayer;
|
|
self->state.max_duration = 5 * GST_SECOND;
|
|
return gst_caps_new_simple ("text/plain", NULL);
|
|
case GST_SUB_PARSE_FORMAT_MPL2:
|
|
self->parse_line = parse_mpl2;
|
|
return gst_caps_new_simple ("text/x-pango-markup", NULL);
|
|
case GST_SUB_PARSE_FORMAT_DKS:
|
|
self->parse_line = parse_dks;
|
|
return gst_caps_new_simple ("text/plain", NULL);
|
|
case GST_SUB_PARSE_FORMAT_SUBVIEWER:
|
|
self->parse_line = parse_subviewer;
|
|
return gst_caps_new_simple ("text/plain", NULL);
|
|
case GST_SUB_PARSE_FORMAT_QTTEXT:
|
|
self->parse_line = parse_qttext;
|
|
qttext_context_init (&self->state);
|
|
return gst_caps_new_simple ("text/x-pango-markup", NULL);
|
|
case GST_SUB_PARSE_FORMAT_UNKNOWN:
|
|
default:
|
|
GST_DEBUG ("no subtitle format detected");
|
|
GST_ELEMENT_ERROR (self, STREAM, WRONG_TYPE,
|
|
("The input is not a valid/supported subtitle file"), (NULL));
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static void
|
|
feed_textbuf (GstSubParse * self, GstBuffer * buf)
|
|
{
|
|
gboolean discont;
|
|
gsize consumed;
|
|
gchar *input = NULL;
|
|
|
|
discont = GST_BUFFER_IS_DISCONT (buf);
|
|
|
|
if (GST_BUFFER_OFFSET_IS_VALID (buf) &&
|
|
GST_BUFFER_OFFSET (buf) != self->offset) {
|
|
self->offset = GST_BUFFER_OFFSET (buf);
|
|
discont = TRUE;
|
|
}
|
|
|
|
if (discont) {
|
|
GST_INFO ("discontinuity");
|
|
/* flush the parser state */
|
|
parser_state_init (&self->state);
|
|
g_string_truncate (self->textbuf, 0);
|
|
gst_adapter_clear (self->adapter);
|
|
#ifndef GST_DISABLE_XML
|
|
if (self->parser_type == GST_SUB_PARSE_FORMAT_SAMI)
|
|
sami_context_reset (&self->state);
|
|
#endif
|
|
/* we could set a flag to make sure that the next buffer we push out also
|
|
* has the DISCONT flag set, but there's no point really given that it's
|
|
* subtitles which are discontinuous by nature. */
|
|
}
|
|
|
|
self->offset = GST_BUFFER_OFFSET (buf) + GST_BUFFER_SIZE (buf);
|
|
self->next_offset = self->offset;
|
|
|
|
gst_adapter_push (self->adapter, buf);
|
|
|
|
input =
|
|
convert_encoding (self, (const gchar *) gst_adapter_peek (self->adapter,
|
|
gst_adapter_available (self->adapter)),
|
|
(gsize) gst_adapter_available (self->adapter), &consumed);
|
|
|
|
if (input && consumed > 0) {
|
|
self->textbuf = g_string_append (self->textbuf, input);
|
|
gst_adapter_flush (self->adapter, consumed);
|
|
}
|
|
|
|
g_free (input);
|
|
}
|
|
|
|
static GstFlowReturn
|
|
handle_buffer (GstSubParse * self, GstBuffer * buf)
|
|
{
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
GstCaps *caps = NULL;
|
|
gchar *line, *subtitle;
|
|
|
|
if (self->first_buffer) {
|
|
self->detected_encoding =
|
|
detect_encoding ((gchar *) GST_BUFFER_DATA (buf),
|
|
GST_BUFFER_SIZE (buf));
|
|
self->first_buffer = FALSE;
|
|
self->state.fps_n = self->fps_n;
|
|
self->state.fps_d = self->fps_d;
|
|
}
|
|
|
|
feed_textbuf (self, buf);
|
|
|
|
/* make sure we know the format */
|
|
if (G_UNLIKELY (self->parser_type == GST_SUB_PARSE_FORMAT_UNKNOWN)) {
|
|
if (!(caps = gst_sub_parse_format_autodetect (self))) {
|
|
return GST_FLOW_UNEXPECTED;
|
|
}
|
|
if (!gst_pad_set_caps (self->srcpad, caps)) {
|
|
gst_caps_unref (caps);
|
|
return GST_FLOW_UNEXPECTED;
|
|
}
|
|
gst_caps_unref (caps);
|
|
|
|
/* push tags */
|
|
if (self->subtitle_codec != NULL) {
|
|
GstTagList *tags;
|
|
|
|
tags = gst_tag_list_new ();
|
|
gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_SUBTITLE_CODEC,
|
|
self->subtitle_codec, NULL);
|
|
gst_element_found_tags_for_pad (GST_ELEMENT (self), self->srcpad, tags);
|
|
}
|
|
}
|
|
|
|
while (!self->flushing && (line = get_next_line (self))) {
|
|
guint offset = 0;
|
|
|
|
/* Set segment on our parser state machine */
|
|
self->state.segment = &self->segment;
|
|
/* Now parse the line, out of segment lines will just return NULL */
|
|
GST_LOG_OBJECT (self, "Parsing line '%s'", line + offset);
|
|
subtitle = self->parse_line (&self->state, line + offset);
|
|
g_free (line);
|
|
|
|
if (subtitle) {
|
|
guint subtitle_len = strlen (subtitle);
|
|
|
|
/* +1 for terminating NUL character */
|
|
ret = gst_pad_alloc_buffer_and_set_caps (self->srcpad,
|
|
GST_BUFFER_OFFSET_NONE, subtitle_len + 1,
|
|
GST_PAD_CAPS (self->srcpad), &buf);
|
|
|
|
if (ret == GST_FLOW_OK) {
|
|
/* copy terminating NUL character as well */
|
|
memcpy (GST_BUFFER_DATA (buf), subtitle, subtitle_len + 1);
|
|
GST_BUFFER_SIZE (buf) = subtitle_len;
|
|
GST_BUFFER_TIMESTAMP (buf) = self->state.start_time;
|
|
GST_BUFFER_DURATION (buf) = self->state.duration;
|
|
|
|
/* in some cases (e.g. tmplayer) we can only determine the duration
|
|
* of a text chunk from the timestamp of the next text chunk; in those
|
|
* cases, we probably want to limit the duration to something
|
|
* reasonable, so we don't end up showing some text for e.g. 40 seconds
|
|
* just because nothing else is being said during that time */
|
|
if (self->state.max_duration > 0 && GST_BUFFER_DURATION_IS_VALID (buf)) {
|
|
if (GST_BUFFER_DURATION (buf) > self->state.max_duration)
|
|
GST_BUFFER_DURATION (buf) = self->state.max_duration;
|
|
}
|
|
|
|
gst_segment_set_last_stop (&self->segment, GST_FORMAT_TIME,
|
|
self->state.start_time);
|
|
|
|
GST_DEBUG_OBJECT (self, "Sending text '%s', %" GST_TIME_FORMAT " + %"
|
|
GST_TIME_FORMAT, subtitle, GST_TIME_ARGS (self->state.start_time),
|
|
GST_TIME_ARGS (self->state.duration));
|
|
|
|
ret = gst_pad_push (self->srcpad, buf);
|
|
}
|
|
|
|
/* move this forward (the tmplayer parser needs this) */
|
|
if (self->state.duration != GST_CLOCK_TIME_NONE)
|
|
self->state.start_time += self->state.duration;
|
|
|
|
g_free (subtitle);
|
|
subtitle = NULL;
|
|
|
|
if (ret != GST_FLOW_OK) {
|
|
GST_DEBUG_OBJECT (self, "flow: %s", gst_flow_get_name (ret));
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_sub_parse_chain (GstPad * sinkpad, GstBuffer * buf)
|
|
{
|
|
GstFlowReturn ret;
|
|
GstSubParse *self;
|
|
|
|
self = GST_SUBPARSE (GST_PAD_PARENT (sinkpad));
|
|
|
|
/* Push newsegment if needed */
|
|
if (self->need_segment) {
|
|
GST_LOG_OBJECT (self, "pushing newsegment event with %" GST_SEGMENT_FORMAT,
|
|
&self->segment);
|
|
|
|
gst_pad_push_event (self->srcpad, gst_event_new_new_segment (FALSE,
|
|
self->segment.rate, self->segment.format,
|
|
self->segment.last_stop, self->segment.stop, self->segment.time));
|
|
self->need_segment = FALSE;
|
|
}
|
|
|
|
ret = handle_buffer (self, buf);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_sub_parse_sink_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
GstSubParse *self = GST_SUBPARSE (gst_pad_get_parent (pad));
|
|
gboolean ret = FALSE;
|
|
|
|
GST_DEBUG ("Handling %s event", GST_EVENT_TYPE_NAME (event));
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_EOS:{
|
|
/* Make sure the last subrip chunk is pushed out even
|
|
* if the file does not have an empty line at the end */
|
|
if (self->parser_type == GST_SUB_PARSE_FORMAT_SUBRIP ||
|
|
self->parser_type == GST_SUB_PARSE_FORMAT_TMPLAYER ||
|
|
self->parser_type == GST_SUB_PARSE_FORMAT_MPL2 ||
|
|
self->parser_type == GST_SUB_PARSE_FORMAT_QTTEXT) {
|
|
GstBuffer *buf = gst_buffer_new_and_alloc (2 + 1);
|
|
|
|
GST_DEBUG ("EOS. Pushing remaining text (if any)");
|
|
GST_BUFFER_DATA (buf)[0] = '\n';
|
|
GST_BUFFER_DATA (buf)[1] = '\n';
|
|
GST_BUFFER_DATA (buf)[2] = '\0'; /* play it safe */
|
|
GST_BUFFER_SIZE (buf) = 2;
|
|
GST_BUFFER_OFFSET (buf) = self->offset;
|
|
gst_sub_parse_chain (pad, buf);
|
|
}
|
|
ret = gst_pad_event_default (pad, event);
|
|
break;
|
|
}
|
|
case GST_EVENT_NEWSEGMENT:
|
|
{
|
|
GstFormat format;
|
|
gdouble rate;
|
|
gint64 start, stop, time;
|
|
gboolean update;
|
|
|
|
gst_event_parse_new_segment (event, &update, &rate, &format, &start,
|
|
&stop, &time);
|
|
|
|
GST_DEBUG_OBJECT (self, "newsegment (%s)", gst_format_get_name (format));
|
|
|
|
if (format == GST_FORMAT_TIME) {
|
|
gst_segment_set_newsegment (&self->segment, update, rate, format,
|
|
start, stop, time);
|
|
} else {
|
|
/* if not time format, we'll either start with a 0 timestamp anyway or
|
|
* it's following a seek in which case we'll have saved the requested
|
|
* seek segment and don't want to overwrite it (remember that on a seek
|
|
* we always just seek back to the start in BYTES format and just throw
|
|
* away all text that's before the requested position; if the subtitles
|
|
* come from an upstream demuxer, it won't be able to handle our BYTES
|
|
* seek request and instead send us a newsegment from the seek request
|
|
* it received via its video pads instead, so all is fine then too) */
|
|
}
|
|
|
|
ret = TRUE;
|
|
gst_event_unref (event);
|
|
break;
|
|
}
|
|
case GST_EVENT_FLUSH_START:
|
|
{
|
|
self->flushing = TRUE;
|
|
|
|
ret = gst_pad_event_default (pad, event);
|
|
break;
|
|
}
|
|
case GST_EVENT_FLUSH_STOP:
|
|
{
|
|
self->flushing = FALSE;
|
|
|
|
ret = gst_pad_event_default (pad, event);
|
|
break;
|
|
}
|
|
default:
|
|
ret = gst_pad_event_default (pad, event);
|
|
break;
|
|
}
|
|
|
|
gst_object_unref (self);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static GstStateChangeReturn
|
|
gst_sub_parse_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
|
|
GstSubParse *self = GST_SUBPARSE (element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
/* format detection will init the parser state */
|
|
self->offset = 0;
|
|
self->next_offset = 0;
|
|
self->parser_type = GST_SUB_PARSE_FORMAT_UNKNOWN;
|
|
self->valid_utf8 = TRUE;
|
|
self->first_buffer = TRUE;
|
|
g_free (self->detected_encoding);
|
|
self->detected_encoding = NULL;
|
|
g_string_truncate (self->textbuf, 0);
|
|
gst_adapter_clear (self->adapter);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = parent_class->change_state (element, transition);
|
|
if (ret == GST_STATE_CHANGE_FAILURE)
|
|
return ret;
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
parser_state_dispose (self, &self->state);
|
|
self->parser_type = GST_SUB_PARSE_FORMAT_UNKNOWN;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Typefind support.
|
|
*/
|
|
|
|
/* FIXME 0.11: these caps are ugly, use app/x-subtitle + type field or so;
|
|
* also, give different subtitle formats really different types */
|
|
static GstStaticCaps mpl2_caps =
|
|
GST_STATIC_CAPS ("application/x-subtitle-mpl2");
|
|
#define SUB_CAPS (gst_static_caps_get (&sub_caps))
|
|
|
|
static GstStaticCaps tmp_caps =
|
|
GST_STATIC_CAPS ("application/x-subtitle-tmplayer");
|
|
#define TMP_CAPS (gst_static_caps_get (&tmp_caps))
|
|
|
|
static GstStaticCaps sub_caps = GST_STATIC_CAPS ("application/x-subtitle");
|
|
#define MPL2_CAPS (gst_static_caps_get (&mpl2_caps))
|
|
|
|
#ifndef GST_DISABLE_XML
|
|
static GstStaticCaps smi_caps = GST_STATIC_CAPS ("application/x-subtitle-sami");
|
|
#define SAMI_CAPS (gst_static_caps_get (&smi_caps))
|
|
#endif
|
|
|
|
static GstStaticCaps dks_caps = GST_STATIC_CAPS ("application/x-subtitle-dks");
|
|
#define DKS_CAPS (gst_static_caps_get (&dks_caps))
|
|
|
|
static GstStaticCaps qttext_caps =
|
|
GST_STATIC_CAPS ("application/x-subtitle-qttext");
|
|
#define QTTEXT_CAPS (gst_static_caps_get (&qttext_caps))
|
|
|
|
static void
|
|
gst_subparse_type_find (GstTypeFind * tf, gpointer private)
|
|
{
|
|
GstSubParseFormat format;
|
|
const guint8 *data;
|
|
GstCaps *caps;
|
|
gchar *str;
|
|
gchar *encoding = NULL;
|
|
const gchar *end;
|
|
|
|
if (!(data = gst_type_find_peek (tf, 0, 129)))
|
|
return;
|
|
|
|
/* make sure string passed to _autodetect() is NUL-terminated */
|
|
str = g_malloc0 (129);
|
|
memcpy (str, data, 128);
|
|
|
|
if ((encoding = detect_encoding (str, 128)) != NULL) {
|
|
gchar *converted_str;
|
|
GError *err = NULL;
|
|
gsize tmp;
|
|
|
|
converted_str = gst_convert_to_utf8 (str, 128, encoding, &tmp, &err);
|
|
if (converted_str == NULL) {
|
|
GST_DEBUG ("Encoding '%s' detected but conversion failed: %s", encoding,
|
|
err->message);
|
|
g_error_free (err);
|
|
g_free (encoding);
|
|
} else {
|
|
g_free (str);
|
|
str = converted_str;
|
|
g_free (encoding);
|
|
}
|
|
}
|
|
|
|
/* Check if at least the first 120 chars are valid UTF8,
|
|
* otherwise convert as always */
|
|
if (!g_utf8_validate (str, 128, &end) && (end - str) < 120) {
|
|
gchar *converted_str;
|
|
GError *err = NULL;
|
|
gsize tmp;
|
|
const gchar *enc;
|
|
|
|
enc = g_getenv ("GST_SUBTITLE_ENCODING");
|
|
if (enc == NULL || *enc == '\0') {
|
|
/* if local encoding is UTF-8 and no encoding specified
|
|
* via the environment variable, assume ISO-8859-15 */
|
|
if (g_get_charset (&enc)) {
|
|
enc = "ISO-8859-15";
|
|
}
|
|
}
|
|
converted_str = gst_convert_to_utf8 (str, 128, enc, &tmp, &err);
|
|
if (converted_str == NULL) {
|
|
GST_DEBUG ("Charset conversion failed: %s", err->message);
|
|
g_error_free (err);
|
|
g_free (str);
|
|
return;
|
|
} else {
|
|
g_free (str);
|
|
str = converted_str;
|
|
}
|
|
}
|
|
|
|
format = gst_sub_parse_data_format_autodetect (str);
|
|
g_free (str);
|
|
|
|
switch (format) {
|
|
case GST_SUB_PARSE_FORMAT_MDVDSUB:
|
|
GST_DEBUG ("MicroDVD format detected");
|
|
caps = SUB_CAPS;
|
|
break;
|
|
case GST_SUB_PARSE_FORMAT_SUBRIP:
|
|
GST_DEBUG ("SubRip format detected");
|
|
caps = SUB_CAPS;
|
|
break;
|
|
case GST_SUB_PARSE_FORMAT_MPSUB:
|
|
GST_DEBUG ("MPSub format detected");
|
|
caps = SUB_CAPS;
|
|
break;
|
|
#ifndef GST_DISABLE_XML
|
|
case GST_SUB_PARSE_FORMAT_SAMI:
|
|
GST_DEBUG ("SAMI (time-based) format detected");
|
|
caps = SAMI_CAPS;
|
|
break;
|
|
#endif
|
|
case GST_SUB_PARSE_FORMAT_TMPLAYER:
|
|
GST_DEBUG ("TMPlayer (time based) format detected");
|
|
caps = TMP_CAPS;
|
|
break;
|
|
/* FIXME: our MPL2 typefinding is not really good enough to warrant
|
|
* returning a high probability (however, since we registered our
|
|
* typefinder here with a rank of MARGINAL we should pretty much only
|
|
* be called if most other typefinders have already run */
|
|
case GST_SUB_PARSE_FORMAT_MPL2:
|
|
GST_DEBUG ("MPL2 (time based) format detected");
|
|
caps = MPL2_CAPS;
|
|
break;
|
|
case GST_SUB_PARSE_FORMAT_SUBVIEWER:
|
|
GST_DEBUG ("SubViewer format detected");
|
|
caps = SUB_CAPS;
|
|
break;
|
|
case GST_SUB_PARSE_FORMAT_DKS:
|
|
GST_DEBUG ("DKS format detected");
|
|
caps = DKS_CAPS;
|
|
break;
|
|
case GST_SUB_PARSE_FORMAT_QTTEXT:
|
|
GST_DEBUG ("QTtext format detected");
|
|
caps = QTTEXT_CAPS;
|
|
break;
|
|
default:
|
|
case GST_SUB_PARSE_FORMAT_UNKNOWN:
|
|
GST_DEBUG ("no subtitle format detected");
|
|
return;
|
|
}
|
|
|
|
/* if we're here, it's ok */
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, caps);
|
|
}
|
|
|
|
static gboolean
|
|
plugin_init (GstPlugin * plugin)
|
|
{
|
|
static gchar *sub_exts[] = { "srt", "sub", "mpsub", "mdvd", "smi", "txt",
|
|
"dks", NULL
|
|
};
|
|
|
|
GST_DEBUG_CATEGORY_INIT (sub_parse_debug, "subparse", 0, ".sub parser");
|
|
|
|
if (!gst_type_find_register (plugin, "subparse_typefind", GST_RANK_MARGINAL,
|
|
gst_subparse_type_find, sub_exts, SUB_CAPS, NULL, NULL))
|
|
return FALSE;
|
|
|
|
if (!gst_element_register (plugin, "subparse",
|
|
GST_RANK_PRIMARY, GST_TYPE_SUBPARSE) ||
|
|
!gst_element_register (plugin, "ssaparse",
|
|
GST_RANK_PRIMARY, GST_TYPE_SSA_PARSE)) {
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
|
|
GST_VERSION_MINOR,
|
|
"subparse",
|
|
"Subtitle parsing",
|
|
plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
|