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fd2a14144a
WebVTT is a new subtitle format for HTML5 video. In this first version of the parser the cue settings are parsed but only stored in the internal parser state structure. Later on these settings could be part of the GstBuffer metadata. https://bugzilla.gnome.org/show_bug.cgi?id=629764
129 lines
3.7 KiB
C
129 lines
3.7 KiB
C
/* GStreamer
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* Copyright (C) <2002> David A. Schleef <ds@schleef.org>
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_SUBPARSE_H__
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#define __GST_SUBPARSE_H__
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#include <gst/gst.h>
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#include <gst/base/gstadapter.h>
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GST_DEBUG_CATEGORY_EXTERN (sub_parse_debug);
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#define GST_CAT_DEFAULT sub_parse_debug
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G_BEGIN_DECLS
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#define GST_TYPE_SUBPARSE \
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(gst_sub_parse_get_type ())
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#define GST_SUBPARSE(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_SUBPARSE, GstSubParse))
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#define GST_SUBPARSE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_SUBPARSE, GstSubParseClass))
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#define GST_IS_SUBPARSE(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_SUBPARSE))
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#define GST_IS_SUBPARSE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_SUBPARSE))
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typedef struct _GstSubParse GstSubParse;
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typedef struct _GstSubParseClass GstSubParseClass;
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/* format enum */
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typedef enum
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{
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GST_SUB_PARSE_FORMAT_UNKNOWN = 0,
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GST_SUB_PARSE_FORMAT_MDVDSUB = 1,
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GST_SUB_PARSE_FORMAT_SUBRIP = 2,
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GST_SUB_PARSE_FORMAT_MPSUB = 3,
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GST_SUB_PARSE_FORMAT_SAMI = 4,
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GST_SUB_PARSE_FORMAT_TMPLAYER = 5,
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GST_SUB_PARSE_FORMAT_MPL2 = 6,
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GST_SUB_PARSE_FORMAT_SUBVIEWER = 7,
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GST_SUB_PARSE_FORMAT_DKS = 8,
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GST_SUB_PARSE_FORMAT_QTTEXT = 9,
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GST_SUB_PARSE_FORMAT_LRC = 10,
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GST_SUB_PARSE_FORMAT_VTT = 11
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} GstSubParseFormat;
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typedef struct {
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int state;
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GString *buf;
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guint64 start_time;
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guint64 duration;
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guint64 max_duration; /* to clamp duration, 0 = no limit (used by tmplayer parser) */
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GstSegment *segment;
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gpointer user_data;
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gboolean have_internal_fps; /* If TRUE don't overwrite fps by property */
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gint fps_n, fps_d; /* used by frame based parsers */
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guint8 line_position; /* percent value */
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gint line_number; /* line number, can be positive or negative */
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guint8 text_position; /* percent value */
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guint8 text_size; /* percent value */
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gchar *vertical; /* "", "vertical", "vertical-lr" */
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gchar *alignment; /* "", "start", "middle", "end" */
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gconstpointer allowed_tags; /* list of markup tags allowed in the cue text. */
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gboolean allows_tag_attributes;
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} ParserState;
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typedef gchar* (*Parser) (ParserState *state, const gchar *line);
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struct _GstSubParse {
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GstElement element;
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GstPad *sinkpad,*srcpad;
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/* contains the input in the input encoding */
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GstAdapter *adapter;
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/* contains the UTF-8 decoded input */
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GString *textbuf;
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GstSubParseFormat parser_type;
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gboolean parser_detected;
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const gchar *subtitle_codec;
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Parser parse_line;
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ParserState state;
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/* seek */
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guint64 offset;
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/* Segment */
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GstSegment segment;
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gboolean need_segment;
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gboolean flushing;
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gboolean valid_utf8;
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gchar *detected_encoding;
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gchar *encoding;
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gboolean first_buffer;
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/* used by frame based parsers */
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gint fps_n, fps_d;
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};
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struct _GstSubParseClass {
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GstElementClass parent_class;
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};
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GType gst_sub_parse_get_type (void);
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G_END_DECLS
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#endif /* __GST_SUBPARSE_H__ */
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