2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 * Copyright (C) 2004 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
4 * Copyright (C) 2006 Tim-Philipp Müller <tim centricular net>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 02111-1307, USA.
29 #include <sys/types.h>
32 #include "gstsubparse.h"
33 #include "gstssaparse.h"
34 #include "samiparse.h"
35 #include "tmplayerparse.h"
36 #include "mpl2parse.h"
37 #include "qttextparse.h"
39 GST_DEBUG_CATEGORY (sub_parse_debug);
41 #define DEFAULT_ENCODING NULL
51 gst_sub_parse_set_property (GObject * object, guint prop_id,
52 const GValue * value, GParamSpec * pspec);
54 gst_sub_parse_get_property (GObject * object, guint prop_id,
55 GValue * value, GParamSpec * pspec);
58 static const GstElementDetails sub_parse_details =
59 GST_ELEMENT_DETAILS ("Subtitle parser",
60 "Codec/Parser/Subtitle",
61 "Parses subtitle (.sub) files into text streams",
62 "Gustavo J. A. M. Carneiro <gjc@inescporto.pt>\n"
63 "GStreamer maintainers <gstreamer-devel@lists.sourceforge.net>");
65 #ifndef GST_DISABLE_XML
66 static GstStaticPadTemplate sink_templ = GST_STATIC_PAD_TEMPLATE ("sink",
69 GST_STATIC_CAPS ("application/x-subtitle; application/x-subtitle-sami; "
70 "application/x-subtitle-tmplayer; application/x-subtitle-mpl2; "
71 "application/x-subtitle-dks; application/x-subtitle-qttext")
74 static GstStaticPadTemplate sink_templ = GST_STATIC_PAD_TEMPLATE ("sink",
77 GST_STATIC_CAPS ("application/x-subtitle; application/x-subtitle-dks; "
78 "application/x-subtitle-tmplayer; application/x-subtitle-mpl2; "
79 "application/x-subtitle-qttext")
83 static GstStaticPadTemplate src_templ = GST_STATIC_PAD_TEMPLATE ("src",
86 GST_STATIC_CAPS ("text/plain; text/x-pango-markup")
89 static void gst_sub_parse_base_init (GstSubParseClass * klass);
90 static void gst_sub_parse_class_init (GstSubParseClass * klass);
91 static void gst_sub_parse_init (GstSubParse * subparse);
93 static gboolean gst_sub_parse_src_event (GstPad * pad, GstEvent * event);
94 static gboolean gst_sub_parse_src_query (GstPad * pad, GstQuery * query);
95 static gboolean gst_sub_parse_sink_event (GstPad * pad, GstEvent * event);
97 static GstStateChangeReturn gst_sub_parse_change_state (GstElement * element,
98 GstStateChange transition);
100 static GstFlowReturn gst_sub_parse_chain (GstPad * sinkpad, GstBuffer * buf);
102 static GstElementClass *parent_class = NULL;
105 gst_sub_parse_get_type (void)
107 static GType sub_parse_type = 0;
109 if (!sub_parse_type) {
110 static const GTypeInfo sub_parse_info = {
111 sizeof (GstSubParseClass),
112 (GBaseInitFunc) gst_sub_parse_base_init,
114 (GClassInitFunc) gst_sub_parse_class_init,
117 sizeof (GstSubParse),
119 (GInstanceInitFunc) gst_sub_parse_init,
122 sub_parse_type = g_type_register_static (GST_TYPE_ELEMENT,
123 "GstSubParse", &sub_parse_info, 0);
126 return sub_parse_type;
130 gst_sub_parse_base_init (GstSubParseClass * klass)
132 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
134 gst_element_class_add_pad_template (element_class,
135 gst_static_pad_template_get (&sink_templ));
136 gst_element_class_add_pad_template (element_class,
137 gst_static_pad_template_get (&src_templ));
138 gst_element_class_set_details (element_class, &sub_parse_details);
142 gst_sub_parse_dispose (GObject * object)
144 GstSubParse *subparse = GST_SUBPARSE (object);
146 GST_DEBUG_OBJECT (subparse, "cleaning up subtitle parser");
148 switch (subparse->parser_type) {
149 case GST_SUB_PARSE_FORMAT_QTTEXT:
150 qttext_context_deinit (&subparse->state);
152 #ifndef GST_DISABLE_XML
153 case GST_SUB_PARSE_FORMAT_SAMI:
154 sami_context_deinit (&subparse->state);
161 if (subparse->encoding) {
162 g_free (subparse->encoding);
163 subparse->encoding = NULL;
166 if (subparse->detected_encoding) {
167 g_free (subparse->detected_encoding);
168 subparse->detected_encoding = NULL;
171 if (subparse->adapter) {
172 g_object_unref (subparse->adapter);
173 subparse->adapter = NULL;
176 if (subparse->textbuf) {
177 g_string_free (subparse->textbuf, TRUE);
178 subparse->textbuf = NULL;
181 GST_CALL_PARENT (G_OBJECT_CLASS, dispose, (object));
185 gst_sub_parse_class_init (GstSubParseClass * klass)
187 GObjectClass *object_class = G_OBJECT_CLASS (klass);
188 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
190 parent_class = g_type_class_peek_parent (klass);
192 object_class->dispose = gst_sub_parse_dispose;
193 object_class->set_property = gst_sub_parse_set_property;
194 object_class->get_property = gst_sub_parse_get_property;
196 element_class->change_state = gst_sub_parse_change_state;
198 g_object_class_install_property (object_class, PROP_ENCODING,
199 g_param_spec_string ("subtitle-encoding", "subtitle charset encoding",
200 "Encoding to assume if input subtitles are not in UTF-8 or any other "
201 "Unicode encoding. If not set, the GST_SUBTITLE_ENCODING environment "
202 "variable will be checked for an encoding to use. If that is not set "
203 "either, ISO-8859-15 will be assumed.", DEFAULT_ENCODING,
204 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
206 g_object_class_install_property (object_class, PROP_VIDEOFPS,
207 gst_param_spec_fraction ("video-fps", "Video framerate",
208 "Framerate of the video stream. This is needed by some subtitle "
209 "formats to synchronize subtitles and video properly. If not set "
210 "and the subtitle format requires it subtitles may be out of sync.",
211 0, 1, G_MAXINT, 1, 24000, 1001, G_PARAM_READWRITE));
215 gst_sub_parse_init (GstSubParse * subparse)
217 subparse->sinkpad = gst_pad_new_from_static_template (&sink_templ, "sink");
218 gst_pad_set_chain_function (subparse->sinkpad,
219 GST_DEBUG_FUNCPTR (gst_sub_parse_chain));
220 gst_pad_set_event_function (subparse->sinkpad,
221 GST_DEBUG_FUNCPTR (gst_sub_parse_sink_event));
222 gst_element_add_pad (GST_ELEMENT (subparse), subparse->sinkpad);
224 subparse->srcpad = gst_pad_new_from_static_template (&src_templ, "src");
225 gst_pad_set_event_function (subparse->srcpad,
226 GST_DEBUG_FUNCPTR (gst_sub_parse_src_event));
227 gst_pad_set_query_function (subparse->srcpad,
228 GST_DEBUG_FUNCPTR (gst_sub_parse_src_query));
229 gst_element_add_pad (GST_ELEMENT (subparse), subparse->srcpad);
231 subparse->textbuf = g_string_new (NULL);
232 subparse->parser_type = GST_SUB_PARSE_FORMAT_UNKNOWN;
233 subparse->flushing = FALSE;
234 gst_segment_init (&subparse->segment, GST_FORMAT_TIME);
235 subparse->need_segment = TRUE;
236 subparse->encoding = g_strdup (DEFAULT_ENCODING);
237 subparse->detected_encoding = NULL;
238 subparse->adapter = gst_adapter_new ();
240 subparse->fps_n = 24000;
241 subparse->fps_d = 1001;
245 * Source pad functions.
249 gst_sub_parse_src_query (GstPad * pad, GstQuery * query)
251 GstSubParse *self = GST_SUBPARSE (gst_pad_get_parent (pad));
252 gboolean ret = FALSE;
254 GST_DEBUG ("Handling %s query", GST_QUERY_TYPE_NAME (query));
256 switch (GST_QUERY_TYPE (query)) {
257 case GST_QUERY_POSITION:{
260 gst_query_parse_position (query, &fmt, NULL);
261 if (fmt != GST_FORMAT_TIME) {
262 ret = gst_pad_peer_query (self->sinkpad, query);
265 gst_query_set_position (query, GST_FORMAT_TIME,
266 self->segment.last_stop);
269 case GST_QUERY_SEEKING:
272 gboolean seekable = FALSE;
276 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
277 if (fmt == GST_FORMAT_TIME) {
278 GstQuery *peerquery = gst_query_new_seeking (GST_FORMAT_BYTES);
280 seekable = gst_pad_peer_query (self->sinkpad, peerquery);
282 gst_query_parse_seeking (peerquery, NULL, &seekable, NULL, NULL);
283 gst_query_unref (peerquery);
286 gst_query_set_seeking (query, fmt, seekable, seekable ? 0 : -1, -1);
291 ret = gst_pad_peer_query (self->sinkpad, query);
295 gst_object_unref (self);
301 gst_sub_parse_src_event (GstPad * pad, GstEvent * event)
303 GstSubParse *self = GST_SUBPARSE (gst_pad_get_parent (pad));
304 gboolean ret = FALSE;
306 GST_DEBUG ("Handling %s event", GST_EVENT_TYPE_NAME (event));
308 switch (GST_EVENT_TYPE (event)) {
312 GstSeekType start_type, stop_type;
317 gst_event_parse_seek (event, &rate, &format, &self->segment_flags,
318 &start_type, &start, &stop_type, &stop);
320 if (format != GST_FORMAT_TIME) {
321 GST_WARNING_OBJECT (self, "we only support seeking in TIME format");
322 gst_event_unref (event);
326 /* Convert that seek to a seeking in bytes at position 0,
327 FIXME: could use an index */
328 ret = gst_pad_push_event (self->sinkpad,
329 gst_event_new_seek (rate, GST_FORMAT_BYTES, self->segment_flags,
330 GST_SEEK_TYPE_SET, 0, GST_SEEK_TYPE_NONE, 0));
333 /* Apply the seek to our segment */
334 gst_segment_set_seek (&self->segment, rate, format, self->segment_flags,
335 start_type, start, stop_type, stop, &update);
337 GST_DEBUG_OBJECT (self, "segment after seek: %" GST_SEGMENT_FORMAT,
340 self->next_offset = 0;
342 self->need_segment = TRUE;
344 GST_WARNING_OBJECT (self, "seek to 0 bytes failed");
347 gst_event_unref (event);
351 ret = gst_pad_event_default (pad, event);
356 gst_object_unref (self);
362 gst_sub_parse_set_property (GObject * object, guint prop_id,
363 const GValue * value, GParamSpec * pspec)
365 GstSubParse *subparse = GST_SUBPARSE (object);
367 GST_OBJECT_LOCK (subparse);
370 g_free (subparse->encoding);
371 subparse->encoding = g_value_dup_string (value);
372 GST_LOG_OBJECT (object, "subtitle encoding set to %s",
373 GST_STR_NULL (subparse->encoding));
377 subparse->fps_n = gst_value_get_fraction_numerator (value);
378 subparse->fps_d = gst_value_get_fraction_denominator (value);
379 GST_DEBUG_OBJECT (object, "video framerate set to %d/%d", subparse->fps_n,
382 if (!subparse->state.have_internal_fps) {
383 subparse->state.fps_n = subparse->fps_n;
384 subparse->state.fps_d = subparse->fps_d;
389 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
392 GST_OBJECT_UNLOCK (subparse);
396 gst_sub_parse_get_property (GObject * object, guint prop_id,
397 GValue * value, GParamSpec * pspec)
399 GstSubParse *subparse = GST_SUBPARSE (object);
401 GST_OBJECT_LOCK (subparse);
404 g_value_set_string (value, subparse->encoding);
407 gst_value_set_fraction (value, subparse->fps_n, subparse->fps_d);
410 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
413 GST_OBJECT_UNLOCK (subparse);
417 gst_sub_parse_get_format_description (GstSubParseFormat format)
420 case GST_SUB_PARSE_FORMAT_MDVDSUB:
422 case GST_SUB_PARSE_FORMAT_SUBRIP:
424 case GST_SUB_PARSE_FORMAT_MPSUB:
426 case GST_SUB_PARSE_FORMAT_SAMI:
428 case GST_SUB_PARSE_FORMAT_TMPLAYER:
430 case GST_SUB_PARSE_FORMAT_MPL2:
432 case GST_SUB_PARSE_FORMAT_SUBVIEWER:
434 case GST_SUB_PARSE_FORMAT_DKS:
436 case GST_SUB_PARSE_FORMAT_QTTEXT:
439 case GST_SUB_PARSE_FORMAT_UNKNOWN:
446 gst_convert_to_utf8 (const gchar * str, gsize len, const gchar * encoding,
447 gsize * consumed, GError ** err)
453 g_convert_with_fallback (str, len, "UTF-8", encoding, "*", consumed, NULL,
458 /* + 3 to skip UTF-8 BOM if it was added */
460 if (len >= 3 && (guint8) ret[0] == 0xEF && (guint8) ret[1] == 0xBB
461 && (guint8) ret[2] == 0xBF)
462 g_memmove (ret, ret + 3, len + 1 - 3);
468 detect_encoding (const gchar * str, gsize len)
470 if (len >= 3 && (guint8) str[0] == 0xEF && (guint8) str[1] == 0xBB
471 && (guint8) str[2] == 0xBF)
472 return g_strdup ("UTF-8");
474 if (len >= 2 && (guint8) str[0] == 0xFE && (guint8) str[1] == 0xFF)
475 return g_strdup ("UTF-16BE");
477 if (len >= 2 && (guint8) str[0] == 0xFF && (guint8) str[1] == 0xFE)
478 return g_strdup ("UTF-16LE");
480 if (len >= 4 && (guint8) str[0] == 0x00 && (guint8) str[1] == 0x00
481 && (guint8) str[2] == 0xFE && (guint8) str[3] == 0xFF)
482 return g_strdup ("UTF-32BE");
484 if (len >= 4 && (guint8) str[0] == 0xFF && (guint8) str[1] == 0xFE
485 && (guint8) str[2] == 0x00 && (guint8) str[3] == 0x00)
486 return g_strdup ("UTF-32LE");
492 convert_encoding (GstSubParse * self, const gchar * str, gsize len,
495 const gchar *encoding;
501 /* First try any detected encoding */
502 if (self->detected_encoding) {
504 gst_convert_to_utf8 (str, len, self->detected_encoding, consumed, &err);
509 GST_WARNING_OBJECT (self, "could not convert string from '%s' to UTF-8: %s",
510 self->detected_encoding, err->message);
511 g_free (self->detected_encoding);
512 self->detected_encoding = NULL;
516 /* Otherwise check if it's UTF8 */
517 if (self->valid_utf8) {
518 if (g_utf8_validate (str, len, NULL)) {
519 GST_LOG_OBJECT (self, "valid UTF-8, no conversion needed");
521 return g_strndup (str, len);
523 GST_INFO_OBJECT (self, "invalid UTF-8!");
524 self->valid_utf8 = FALSE;
527 /* Else try fallback */
528 encoding = self->encoding;
529 if (encoding == NULL || *encoding == '\0') {
530 encoding = g_getenv ("GST_SUBTITLE_ENCODING");
532 if (encoding == NULL || *encoding == '\0') {
533 /* if local encoding is UTF-8 and no encoding specified
534 * via the environment variable, assume ISO-8859-15 */
535 if (g_get_charset (&encoding)) {
536 encoding = "ISO-8859-15";
540 ret = gst_convert_to_utf8 (str, len, encoding, consumed, &err);
543 GST_WARNING_OBJECT (self, "could not convert string from '%s' to UTF-8: %s",
544 encoding, err->message);
547 /* invalid input encoding, fall back to ISO-8859-15 (always succeeds) */
548 ret = gst_convert_to_utf8 (str, len, "ISO-8859-15", consumed, NULL);
551 GST_LOG_OBJECT (self,
552 "successfully converted %" G_GSIZE_FORMAT " characters from %s to UTF-8"
553 "%s", len, encoding, (err) ? " , using ISO-8859-15 as fallback" : "");
559 get_next_line (GstSubParse * self)
562 const char *line_end;
564 gboolean have_r = FALSE;
566 line_end = strchr (self->textbuf->str, '\n');
569 /* end-of-line not found; return for more data */
573 /* get rid of '\r' */
574 if (line_end != self->textbuf->str && *(line_end - 1) == '\r') {
579 line_len = line_end - self->textbuf->str;
580 line = g_strndup (self->textbuf->str, line_len);
581 self->textbuf = g_string_erase (self->textbuf, 0,
582 line_len + (have_r ? 2 : 1));
587 parse_mdvdsub (ParserState * state, const gchar * line)
589 const gchar *line_split;
591 guint start_frame, end_frame;
592 gint64 clip_start = 0, clip_stop = 0;
593 gboolean in_seg = FALSE;
597 /* style variables */
603 if (sscanf (line, "{%u}{%u}", &start_frame, &end_frame) != 2) {
604 g_warning ("Parse of the following line, assumed to be in microdvd .sub"
605 " format, failed:\n%s", line);
609 /* skip the {%u}{%u} part */
610 line = strchr (line, '}') + 1;
611 line = strchr (line, '}') + 1;
613 /* see if there's a first line with a framerate */
614 if (start_frame == 1 && end_frame == 1) {
615 gchar *rest, *end = NULL;
617 rest = g_strdup (line);
618 g_strdelimit (rest, ",", '.');
619 fps = g_ascii_strtod (rest, &end);
621 gst_util_double_to_fraction (fps, &state->fps_n, &state->fps_d);
622 GST_INFO ("framerate from file: %d/%d ('%s')", state->fps_n,
630 gst_util_uint64_scale (start_frame, GST_SECOND * state->fps_d,
633 gst_util_uint64_scale (end_frame - start_frame, GST_SECOND * state->fps_d,
636 /* Check our segment start/stop */
637 in_seg = gst_segment_clip (state->segment, GST_FORMAT_TIME,
638 state->start_time, state->start_time + state->duration, &clip_start,
641 /* No need to parse that text if it's out of segment */
643 state->start_time = clip_start;
644 state->duration = clip_stop - clip_start;
649 markup = g_string_new (NULL);
654 /* parse style markup */
655 if (strncmp (line, "{y:i}", 5) == 0) {
657 line = strchr (line, '}') + 1;
659 if (strncmp (line, "{y:b}", 5) == 0) {
661 line = strchr (line, '}') + 1;
663 if (sscanf (line, "{s:%u}", &fontsize) == 1) {
664 line = strchr (line, '}') + 1;
666 /* forward slashes at beginning/end signify italics too */
667 if (g_str_has_prefix (line, "/")) {
671 if ((line_split = strchr (line, '|')))
672 line_chunk = g_markup_escape_text (line, line_split - line);
674 line_chunk = g_markup_escape_text (line, strlen (line));
676 /* Remove italics markers at end of line/stanza (CHECKME: are end slashes
677 * always at the end of a line or can they span multiple lines?) */
678 if (g_str_has_suffix (line_chunk, "/")) {
679 line_chunk[strlen (line_chunk) - 1] = '\0';
682 markup = g_string_append (markup, "<span");
684 g_string_append (markup, " style=\"italic\"");
686 g_string_append (markup, " weight=\"bold\"");
688 g_string_append_printf (markup, " size=\"%u\"", fontsize * 1000);
689 g_string_append_printf (markup, ">%s</span>", line_chunk);
692 g_string_append (markup, "\n");
693 line = line_split + 1;
699 g_string_free (markup, FALSE);
700 GST_DEBUG ("parse_mdvdsub returning (%f+%f): %s",
701 state->start_time / (double) GST_SECOND,
702 state->duration / (double) GST_SECOND, ret);
707 strip_trailing_newlines (gchar * txt)
713 while (len > 1 && txt[len - 1] == '\n') {
720 /* we want to escape text in general, but retain basic markup like
721 * <i></i>, <u></u>, and <b></b>. The easiest and safest way is to
722 * just unescape a white list of allowed markups again after
723 * escaping everything (the text between these simple markers isn't
724 * necessarily escaped, so it seems best to do it like this) */
726 subrip_unescape_formatting (gchar * txt)
730 for (pos = txt; pos != NULL && *pos != '\0'; ++pos) {
731 if (g_ascii_strncasecmp (pos, "<u>", 9) == 0 ||
732 g_ascii_strncasecmp (pos, "<i>", 9) == 0 ||
733 g_ascii_strncasecmp (pos, "<b>", 9) == 0) {
735 pos[1] = g_ascii_tolower (pos[4]);
737 /* move NUL terminator as well */
738 g_memmove (pos + 3, pos + 9, strlen (pos + 9) + 1);
743 for (pos = txt; pos != NULL && *pos != '\0'; ++pos) {
744 if (g_ascii_strncasecmp (pos, "</u>", 10) == 0 ||
745 g_ascii_strncasecmp (pos, "</i>", 10) == 0 ||
746 g_ascii_strncasecmp (pos, "</b>", 10) == 0) {
749 pos[2] = g_ascii_tolower (pos[5]);
751 /* move NUL terminator as well */
752 g_memmove (pos + 4, pos + 10, strlen (pos + 10) + 1);
760 subrip_remove_unhandled_tag (gchar * start, gchar * stop)
764 tag = start + strlen ("<");
768 if (g_ascii_tolower (*tag) < 'a' || g_ascii_tolower (*tag) > 'z')
773 GST_LOG ("removing unhandled tag '%s'", start);
775 g_memmove (start, stop, strlen (stop) + 1);
779 /* remove tags we haven't explicitly allowed earlier on, like font tags
782 subrip_remove_unhandled_tags (gchar * txt)
786 for (pos = txt; pos != NULL && *pos != '\0'; ++pos) {
787 if (strncmp (pos, "<", 4) == 0 && (gt = strstr (pos + 4, ">"))) {
788 if (subrip_remove_unhandled_tag (pos, gt + strlen (">")))
794 /* we only allow <i>, <u> and <b>, so let's take a simple approach. This code
795 * assumes the input has been escaped and subrip_unescape_formatting() has then
796 * been run over the input! This function adds missing closing markup tags and
797 * removes broken closing tags for tags that have never been opened. */
799 subrip_fix_up_markup (gchar ** p_txt)
801 gchar *cur, *next_tag;
803 guint num_open_tags = 0;
805 g_assert (*p_txt != NULL);
808 while (*cur != '\0') {
809 next_tag = strchr (cur, '<');
810 if (next_tag == NULL)
816 if (num_open_tags == 0 || open_tags[num_open_tags - 1] != *next_tag) {
817 GST_LOG ("broken input, closing tag '%c' is not open", *next_tag);
818 g_memmove (next_tag - 2, next_tag + 2, strlen (next_tag + 2) + 1);
821 /* it's all good, closing tag which is open */
829 if (num_open_tags == G_N_ELEMENTS (open_tags))
830 return; /* something dodgy is going on, stop parsing */
831 open_tags[num_open_tags] = *next_tag;
835 GST_ERROR ("unexpected tag '%c' (%s)", *next_tag, next_tag);
836 g_assert_not_reached ();
842 if (num_open_tags > 0) {
845 s = g_string_new (*p_txt);
846 while (num_open_tags > 0) {
847 GST_LOG ("adding missing closing tag '%c'", open_tags[num_open_tags - 1]);
848 g_string_append_c (s, '<');
849 g_string_append_c (s, '/');
850 g_string_append_c (s, open_tags[num_open_tags - 1]);
851 g_string_append_c (s, '>');
855 *p_txt = g_string_free (s, FALSE);
860 parse_subrip_time (const gchar * ts_string, GstClockTime * t)
862 gchar s[128] = { '\0', };
864 guint hour, min, sec, msec, len;
866 while (*ts_string == ' ')
869 g_strlcpy (s, ts_string, sizeof (s));
870 if ((end = strstr (s, "-->")))
874 /* ms may be in these formats:
875 * hh:mm:ss,500 = 500ms
878 * hh:mm:ss, 50 = 50ms
880 * and the same with . instead of ,.
881 * sscanf() doesn't differentiate between ' 5' and '5' so munge
882 * the white spaces within the timestamp to '0' (I'm sure there's a
883 * way to make sscanf() do this for us, but how?)
885 g_strdelimit (s, " ", '0');
886 g_strdelimit (s, ".", ',');
888 /* make sure we have exactly three digits after he comma */
890 g_assert (p != NULL);
897 g_strlcat (&p[len], "0", 2);
901 GST_LOG ("parsing timestamp '%s'", s);
902 if (sscanf (s, "%u:%u:%u,%u", &hour, &min, &sec, &msec) != 4) {
903 GST_WARNING ("failed to parse subrip timestamp string '%s'", s);
907 *t = ((hour * 3600) + (min * 60) + sec) * GST_SECOND + msec * GST_MSECOND;
912 parse_subrip (ParserState * state, const gchar * line)
917 switch (state->state) {
919 /* looking for a single integer */
920 if (sscanf (line, "%u", &subnum) == 1)
925 GstClockTime ts_start, ts_end;
928 /* looking for start_time --> end_time */
929 if ((end_time = strstr (line, " --> ")) &&
930 parse_subrip_time (line, &ts_start) &&
931 parse_subrip_time (end_time + strlen (" --> "), &ts_end) &&
932 state->start_time <= ts_end) {
934 state->start_time = ts_start;
935 state->duration = ts_end - ts_start;
937 GST_DEBUG ("error parsing subrip time line '%s'", line);
944 /* No need to parse that text if it's out of segment */
945 gint64 clip_start = 0, clip_stop = 0;
946 gboolean in_seg = FALSE;
948 /* Check our segment start/stop */
949 in_seg = gst_segment_clip (state->segment, GST_FORMAT_TIME,
950 state->start_time, state->start_time + state->duration,
951 &clip_start, &clip_stop);
954 state->start_time = clip_start;
955 state->duration = clip_stop - clip_start;
961 /* looking for subtitle text; empty line ends this subtitle entry */
963 g_string_append_c (state->buf, '\n');
964 g_string_append (state->buf, line);
965 if (strlen (line) == 0) {
966 ret = g_markup_escape_text (state->buf->str, state->buf->len);
967 g_string_truncate (state->buf, 0);
969 subrip_unescape_formatting (ret);
970 subrip_remove_unhandled_tags (ret);
971 strip_trailing_newlines (ret);
972 subrip_fix_up_markup (&ret);
977 g_return_val_if_reached (NULL);
982 unescape_newlines_br (gchar * read)
986 /* Replace all occurences of '[br]' with a newline as version 2
987 * of the subviewer format uses this for newlines */
989 if (read[0] == '\0' || read[1] == '\0' || read[2] == '\0' || read[3] == '\0')
993 if (strncmp (read, "[br]", 4) == 0) {
1007 parse_subviewer (ParserState * state, const gchar * line)
1009 guint h1, m1, s1, ms1;
1010 guint h2, m2, s2, ms2;
1013 /* TODO: Maybe also parse the fields in the header, especially DELAY.
1014 * For examples see the unit test or
1015 * http://www.doom9.org/index.html?/sub.htm */
1017 switch (state->state) {
1019 /* looking for start_time,end_time */
1020 if (sscanf (line, "%u:%u:%u.%u,%u:%u:%u.%u",
1021 &h1, &m1, &s1, &ms1, &h2, &m2, &s2, &ms2) == 8) {
1024 (((guint64) h1) * 3600 + m1 * 60 + s1) * GST_SECOND +
1027 (((guint64) h2) * 3600 + m2 * 60 + s2) * GST_SECOND +
1028 ms2 * GST_MSECOND - state->start_time;
1033 /* No need to parse that text if it's out of segment */
1034 gint64 clip_start = 0, clip_stop = 0;
1035 gboolean in_seg = FALSE;
1037 /* Check our segment start/stop */
1038 in_seg = gst_segment_clip (state->segment, GST_FORMAT_TIME,
1039 state->start_time, state->start_time + state->duration,
1040 &clip_start, &clip_stop);
1043 state->start_time = clip_start;
1044 state->duration = clip_stop - clip_start;
1050 /* looking for subtitle text; empty line ends this subtitle entry */
1051 if (state->buf->len)
1052 g_string_append_c (state->buf, '\n');
1053 g_string_append (state->buf, line);
1054 if (strlen (line) == 0) {
1055 ret = g_strdup (state->buf->str);
1056 unescape_newlines_br (ret);
1057 strip_trailing_newlines (ret);
1058 g_string_truncate (state->buf, 0);
1064 g_assert_not_reached ();
1070 parse_mpsub (ParserState * state, const gchar * line)
1075 switch (state->state) {
1077 /* looking for two floats (offset, duration) */
1078 if (sscanf (line, "%f %f", &t1, &t2) == 2) {
1080 state->start_time += state->duration + GST_SECOND * t1;
1081 state->duration = GST_SECOND * t2;
1085 { /* No need to parse that text if it's out of segment */
1086 gint64 clip_start = 0, clip_stop = 0;
1087 gboolean in_seg = FALSE;
1089 /* Check our segment start/stop */
1090 in_seg = gst_segment_clip (state->segment, GST_FORMAT_TIME,
1091 state->start_time, state->start_time + state->duration,
1092 &clip_start, &clip_stop);
1095 state->start_time = clip_start;
1096 state->duration = clip_stop - clip_start;
1102 /* looking for subtitle text; empty line ends this
1104 if (state->buf->len)
1105 g_string_append_c (state->buf, '\n');
1106 g_string_append (state->buf, line);
1107 if (strlen (line) == 0) {
1108 ret = g_strdup (state->buf->str);
1109 g_string_truncate (state->buf, 0);
1115 g_assert_not_reached ();
1120 static const gchar *
1121 dks_skip_timestamp (const gchar * line)
1123 while (*line && *line != ']')
1131 parse_dks (ParserState * state, const gchar * line)
1135 switch (state->state) {
1137 /* Looking for the start time and text */
1138 if (sscanf (line, "[%u:%u:%u]", &h, &m, &s) == 3) {
1140 state->start_time = (((guint64) h) * 3600 + m * 60 + s) * GST_SECOND;
1141 text = dks_skip_timestamp (line);
1144 g_string_append (state->buf, text);
1150 gint64 clip_start = 0, clip_stop = 0;
1154 /* Looking for the end time */
1155 if (sscanf (line, "[%u:%u:%u]", &h, &m, &s) == 3) {
1157 state->duration = (((guint64) h) * 3600 + m * 60 + s) * GST_SECOND -
1160 GST_WARNING ("Failed to parse subtitle end time");
1164 /* Check if this subtitle is out of the current segment */
1165 in_seg = gst_segment_clip (state->segment, GST_FORMAT_TIME,
1166 state->start_time, state->start_time + state->duration,
1167 &clip_start, &clip_stop);
1173 state->start_time = clip_start;
1174 state->duration = clip_stop - clip_start;
1176 ret = g_strdup (state->buf->str);
1177 g_string_truncate (state->buf, 0);
1178 unescape_newlines_br (ret);
1182 g_assert_not_reached ();
1188 parser_state_init (ParserState * state)
1190 GST_DEBUG ("initialising parser");
1193 g_string_truncate (state->buf, 0);
1195 state->buf = g_string_new (NULL);
1198 state->start_time = 0;
1199 state->duration = 0;
1200 state->max_duration = 0; /* no limit */
1202 state->segment = NULL;
1206 parser_state_dispose (GstSubParse * self, ParserState * state)
1209 g_string_free (state->buf, TRUE);
1212 if (state->user_data) {
1213 switch (self->parser_type) {
1214 #ifndef GST_DISABLE_XML
1215 case GST_SUB_PARSE_FORMAT_SAMI:
1216 sami_context_reset (state);
1225 /* regex type enum */
1228 GST_SUB_PARSE_REGEX_UNKNOWN = 0,
1229 GST_SUB_PARSE_REGEX_MDVDSUB = 1,
1230 GST_SUB_PARSE_REGEX_SUBRIP = 2,
1231 GST_SUB_PARSE_REGEX_DKS = 3,
1235 gst_sub_parse_data_format_autodetect_regex_once (GstSubParseRegex regtype)
1237 gpointer result = NULL;
1238 GError *gerr = NULL;
1240 case GST_SUB_PARSE_REGEX_MDVDSUB:
1242 (gpointer) g_regex_new ("^\\{[0-9]+\\}\\{[0-9]+\\}", 0, 0, &gerr);
1243 if (result == NULL) {
1244 g_warning ("Compilation of mdvd regex failed: %s", gerr->message);
1245 g_error_free (gerr);
1248 case GST_SUB_PARSE_REGEX_SUBRIP:
1249 result = (gpointer) g_regex_new ("^([ 0-9]){0,3}[0-9]\\s*(\x0d)?\x0a"
1250 "[ 0-9][0-9]:[ 0-9][0-9]:[ 0-9][0-9][,.][ 0-9]{0,2}[0-9]"
1251 " +--> +([ 0-9])?[0-9]:[ 0-9][0-9]:[ 0-9][0-9][,.][ 0-9]{0,2}[0-9]",
1253 if (result == NULL) {
1254 g_warning ("Compilation of subrip regex failed: %s", gerr->message);
1255 g_error_free (gerr);
1258 case GST_SUB_PARSE_REGEX_DKS:
1259 result = (gpointer) g_regex_new ("^\[[0-9]+:[0-9]+:[0-9]+].*",
1261 if (result == NULL) {
1262 g_warning ("Compilation of dks regex failed: %s", gerr->message);
1263 g_error_free (gerr);
1267 GST_WARNING ("Trying to allocate regex of unknown type %u", regtype);
1273 * FIXME: maybe we should pass along a second argument, the preceding
1274 * text buffer, because that is how this originally worked, even though
1275 * I don't really see the use of that.
1278 static GstSubParseFormat
1279 gst_sub_parse_data_format_autodetect (gchar * match_str)
1283 static GOnce mdvd_rx_once = G_ONCE_INIT;
1284 static GOnce subrip_rx_once = G_ONCE_INIT;
1285 static GOnce dks_rx_once = G_ONCE_INIT;
1291 g_once (&mdvd_rx_once,
1292 (GThreadFunc) gst_sub_parse_data_format_autodetect_regex_once,
1293 (gpointer) GST_SUB_PARSE_REGEX_MDVDSUB);
1294 g_once (&subrip_rx_once,
1295 (GThreadFunc) gst_sub_parse_data_format_autodetect_regex_once,
1296 (gpointer) GST_SUB_PARSE_REGEX_SUBRIP);
1297 g_once (&dks_rx_once,
1298 (GThreadFunc) gst_sub_parse_data_format_autodetect_regex_once,
1299 (gpointer) GST_SUB_PARSE_REGEX_DKS);
1301 mdvd_grx = (GRegex *) mdvd_rx_once.retval;
1302 subrip_grx = (GRegex *) subrip_rx_once.retval;
1303 dks_grx = (GRegex *) dks_rx_once.retval;
1305 if (g_regex_match (mdvd_grx, match_str, 0, NULL) == TRUE) {
1306 GST_LOG ("MicroDVD (frame based) format detected");
1307 return GST_SUB_PARSE_FORMAT_MDVDSUB;
1309 if (g_regex_match (subrip_grx, match_str, 0, NULL) == TRUE) {
1310 GST_LOG ("SubRip (time based) format detected");
1311 return GST_SUB_PARSE_FORMAT_SUBRIP;
1313 if (g_regex_match (dks_grx, match_str, 0, NULL) == TRUE) {
1314 GST_LOG ("DKS (time based) format detected");
1315 return GST_SUB_PARSE_FORMAT_DKS;
1318 if (!strncmp (match_str, "FORMAT=TIME", 11)) {
1319 GST_LOG ("MPSub (time based) format detected");
1320 return GST_SUB_PARSE_FORMAT_MPSUB;
1322 #ifndef GST_DISABLE_XML
1323 if (strstr (match_str, "<SAMI>") != NULL ||
1324 strstr (match_str, "<sami>") != NULL) {
1325 GST_LOG ("SAMI (time based) format detected");
1326 return GST_SUB_PARSE_FORMAT_SAMI;
1329 /* we're boldly assuming the first subtitle appears within the first hour */
1330 if (sscanf (match_str, "0:%02u:%02u:", &n1, &n2) == 2 ||
1331 sscanf (match_str, "0:%02u:%02u=", &n1, &n2) == 2 ||
1332 sscanf (match_str, "00:%02u:%02u:", &n1, &n2) == 2 ||
1333 sscanf (match_str, "00:%02u:%02u=", &n1, &n2) == 2 ||
1334 sscanf (match_str, "00:%02u:%02u,%u=", &n1, &n2, &n3) == 3) {
1335 GST_LOG ("TMPlayer (time based) format detected");
1336 return GST_SUB_PARSE_FORMAT_TMPLAYER;
1338 if (sscanf (match_str, "[%u][%u]", &n1, &n2) == 2) {
1339 GST_LOG ("MPL2 (time based) format detected");
1340 return GST_SUB_PARSE_FORMAT_MPL2;
1342 if (strstr (match_str, "[INFORMATION]") != NULL) {
1343 GST_LOG ("SubViewer (time based) format detected");
1344 return GST_SUB_PARSE_FORMAT_SUBVIEWER;
1346 if (strstr (match_str, "{QTtext}") != NULL) {
1347 GST_LOG ("QTtext (time based) format detected");
1348 return GST_SUB_PARSE_FORMAT_QTTEXT;
1351 GST_DEBUG ("no subtitle format detected");
1352 return GST_SUB_PARSE_FORMAT_UNKNOWN;
1356 gst_sub_parse_format_autodetect (GstSubParse * self)
1359 GstSubParseFormat format;
1361 if (strlen (self->textbuf->str) < 30) {
1362 GST_DEBUG ("File too small to be a subtitles file");
1366 data = g_strndup (self->textbuf->str, 35);
1367 format = gst_sub_parse_data_format_autodetect (data);
1370 self->parser_type = format;
1371 self->subtitle_codec = gst_sub_parse_get_format_description (format);
1372 parser_state_init (&self->state);
1375 case GST_SUB_PARSE_FORMAT_MDVDSUB:
1376 self->parse_line = parse_mdvdsub;
1377 return gst_caps_new_simple ("text/x-pango-markup", NULL);
1378 case GST_SUB_PARSE_FORMAT_SUBRIP:
1379 self->parse_line = parse_subrip;
1380 return gst_caps_new_simple ("text/x-pango-markup", NULL);
1381 case GST_SUB_PARSE_FORMAT_MPSUB:
1382 self->parse_line = parse_mpsub;
1383 return gst_caps_new_simple ("text/plain", NULL);
1384 #ifndef GST_DISABLE_XML
1385 case GST_SUB_PARSE_FORMAT_SAMI:
1386 self->parse_line = parse_sami;
1387 sami_context_init (&self->state);
1388 return gst_caps_new_simple ("text/x-pango-markup", NULL);
1390 case GST_SUB_PARSE_FORMAT_TMPLAYER:
1391 self->parse_line = parse_tmplayer;
1392 self->state.max_duration = 5 * GST_SECOND;
1393 return gst_caps_new_simple ("text/plain", NULL);
1394 case GST_SUB_PARSE_FORMAT_MPL2:
1395 self->parse_line = parse_mpl2;
1396 return gst_caps_new_simple ("text/x-pango-markup", NULL);
1397 case GST_SUB_PARSE_FORMAT_DKS:
1398 self->parse_line = parse_dks;
1399 return gst_caps_new_simple ("text/plain", NULL);
1400 case GST_SUB_PARSE_FORMAT_SUBVIEWER:
1401 self->parse_line = parse_subviewer;
1402 return gst_caps_new_simple ("text/plain", NULL);
1403 case GST_SUB_PARSE_FORMAT_QTTEXT:
1404 self->parse_line = parse_qttext;
1405 qttext_context_init (&self->state);
1406 return gst_caps_new_simple ("text/x-pango-markup", NULL);
1407 case GST_SUB_PARSE_FORMAT_UNKNOWN:
1409 GST_DEBUG ("no subtitle format detected");
1410 GST_ELEMENT_ERROR (self, STREAM, WRONG_TYPE,
1411 ("The input is not a valid/supported subtitle file"), (NULL));
1417 feed_textbuf (GstSubParse * self, GstBuffer * buf)
1421 gchar *input = NULL;
1423 discont = GST_BUFFER_IS_DISCONT (buf);
1425 if (GST_BUFFER_OFFSET_IS_VALID (buf) &&
1426 GST_BUFFER_OFFSET (buf) != self->offset) {
1427 self->offset = GST_BUFFER_OFFSET (buf);
1432 GST_INFO ("discontinuity");
1433 /* flush the parser state */
1434 parser_state_init (&self->state);
1435 g_string_truncate (self->textbuf, 0);
1436 gst_adapter_clear (self->adapter);
1437 #ifndef GST_DISABLE_XML
1438 if (self->parser_type == GST_SUB_PARSE_FORMAT_SAMI)
1439 sami_context_reset (&self->state);
1441 /* we could set a flag to make sure that the next buffer we push out also
1442 * has the DISCONT flag set, but there's no point really given that it's
1443 * subtitles which are discontinuous by nature. */
1446 self->offset = GST_BUFFER_OFFSET (buf) + GST_BUFFER_SIZE (buf);
1447 self->next_offset = self->offset;
1449 gst_adapter_push (self->adapter, buf);
1452 convert_encoding (self, (const gchar *) gst_adapter_peek (self->adapter,
1453 gst_adapter_available (self->adapter)),
1454 (gsize) gst_adapter_available (self->adapter), &consumed);
1456 if (input && consumed > 0) {
1457 self->textbuf = g_string_append (self->textbuf, input);
1458 gst_adapter_flush (self->adapter, consumed);
1464 static GstFlowReturn
1465 handle_buffer (GstSubParse * self, GstBuffer * buf)
1467 GstFlowReturn ret = GST_FLOW_OK;
1468 GstCaps *caps = NULL;
1469 gchar *line, *subtitle;
1471 if (self->first_buffer) {
1472 self->detected_encoding =
1473 detect_encoding ((gchar *) GST_BUFFER_DATA (buf),
1474 GST_BUFFER_SIZE (buf));
1475 self->first_buffer = FALSE;
1476 self->state.fps_n = self->fps_n;
1477 self->state.fps_d = self->fps_d;
1480 feed_textbuf (self, buf);
1482 /* make sure we know the format */
1483 if (G_UNLIKELY (self->parser_type == GST_SUB_PARSE_FORMAT_UNKNOWN)) {
1484 if (!(caps = gst_sub_parse_format_autodetect (self))) {
1485 return GST_FLOW_UNEXPECTED;
1487 if (!gst_pad_set_caps (self->srcpad, caps)) {
1488 gst_caps_unref (caps);
1489 return GST_FLOW_UNEXPECTED;
1491 gst_caps_unref (caps);
1494 if (self->subtitle_codec != NULL) {
1497 tags = gst_tag_list_new ();
1498 gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_SUBTITLE_CODEC,
1499 self->subtitle_codec, NULL);
1500 gst_element_found_tags_for_pad (GST_ELEMENT (self), self->srcpad, tags);
1504 while (!self->flushing && (line = get_next_line (self))) {
1507 /* Set segment on our parser state machine */
1508 self->state.segment = &self->segment;
1509 /* Now parse the line, out of segment lines will just return NULL */
1510 GST_LOG_OBJECT (self, "Parsing line '%s'", line + offset);
1511 subtitle = self->parse_line (&self->state, line + offset);
1515 guint subtitle_len = strlen (subtitle);
1517 /* +1 for terminating NUL character */
1518 ret = gst_pad_alloc_buffer_and_set_caps (self->srcpad,
1519 GST_BUFFER_OFFSET_NONE, subtitle_len + 1,
1520 GST_PAD_CAPS (self->srcpad), &buf);
1522 if (ret == GST_FLOW_OK) {
1523 /* copy terminating NUL character as well */
1524 memcpy (GST_BUFFER_DATA (buf), subtitle, subtitle_len + 1);
1525 GST_BUFFER_SIZE (buf) = subtitle_len;
1526 GST_BUFFER_TIMESTAMP (buf) = self->state.start_time;
1527 GST_BUFFER_DURATION (buf) = self->state.duration;
1529 /* in some cases (e.g. tmplayer) we can only determine the duration
1530 * of a text chunk from the timestamp of the next text chunk; in those
1531 * cases, we probably want to limit the duration to something
1532 * reasonable, so we don't end up showing some text for e.g. 40 seconds
1533 * just because nothing else is being said during that time */
1534 if (self->state.max_duration > 0 && GST_BUFFER_DURATION_IS_VALID (buf)) {
1535 if (GST_BUFFER_DURATION (buf) > self->state.max_duration)
1536 GST_BUFFER_DURATION (buf) = self->state.max_duration;
1539 gst_segment_set_last_stop (&self->segment, GST_FORMAT_TIME,
1540 self->state.start_time);
1542 GST_DEBUG_OBJECT (self, "Sending text '%s', %" GST_TIME_FORMAT " + %"
1543 GST_TIME_FORMAT, subtitle, GST_TIME_ARGS (self->state.start_time),
1544 GST_TIME_ARGS (self->state.duration));
1546 ret = gst_pad_push (self->srcpad, buf);
1549 /* move this forward (the tmplayer parser needs this) */
1550 if (self->state.duration != GST_CLOCK_TIME_NONE)
1551 self->state.start_time += self->state.duration;
1556 if (ret != GST_FLOW_OK) {
1557 GST_DEBUG_OBJECT (self, "flow: %s", gst_flow_get_name (ret));
1566 static GstFlowReturn
1567 gst_sub_parse_chain (GstPad * sinkpad, GstBuffer * buf)
1572 self = GST_SUBPARSE (GST_PAD_PARENT (sinkpad));
1574 /* Push newsegment if needed */
1575 if (self->need_segment) {
1576 GST_LOG_OBJECT (self, "pushing newsegment event with %" GST_SEGMENT_FORMAT,
1579 gst_pad_push_event (self->srcpad, gst_event_new_new_segment (FALSE,
1580 self->segment.rate, self->segment.format,
1581 self->segment.last_stop, self->segment.stop, self->segment.time));
1582 self->need_segment = FALSE;
1585 ret = handle_buffer (self, buf);
1591 gst_sub_parse_sink_event (GstPad * pad, GstEvent * event)
1593 GstSubParse *self = GST_SUBPARSE (gst_pad_get_parent (pad));
1594 gboolean ret = FALSE;
1596 GST_DEBUG ("Handling %s event", GST_EVENT_TYPE_NAME (event));
1598 switch (GST_EVENT_TYPE (event)) {
1599 case GST_EVENT_EOS:{
1600 /* Make sure the last subrip chunk is pushed out even
1601 * if the file does not have an empty line at the end */
1602 if (self->parser_type == GST_SUB_PARSE_FORMAT_SUBRIP ||
1603 self->parser_type == GST_SUB_PARSE_FORMAT_TMPLAYER ||
1604 self->parser_type == GST_SUB_PARSE_FORMAT_MPL2 ||
1605 self->parser_type == GST_SUB_PARSE_FORMAT_QTTEXT) {
1606 GstBuffer *buf = gst_buffer_new_and_alloc (2 + 1);
1608 GST_DEBUG ("EOS. Pushing remaining text (if any)");
1609 GST_BUFFER_DATA (buf)[0] = '\n';
1610 GST_BUFFER_DATA (buf)[1] = '\n';
1611 GST_BUFFER_DATA (buf)[2] = '\0'; /* play it safe */
1612 GST_BUFFER_SIZE (buf) = 2;
1613 GST_BUFFER_OFFSET (buf) = self->offset;
1614 gst_sub_parse_chain (pad, buf);
1616 ret = gst_pad_event_default (pad, event);
1619 case GST_EVENT_NEWSEGMENT:
1623 gint64 start, stop, time;
1626 gst_event_parse_new_segment (event, &update, &rate, &format, &start,
1629 GST_DEBUG_OBJECT (self, "newsegment (%s)", gst_format_get_name (format));
1631 if (format == GST_FORMAT_TIME) {
1632 gst_segment_set_newsegment (&self->segment, update, rate, format,
1635 /* if not time format, we'll either start with a 0 timestamp anyway or
1636 * it's following a seek in which case we'll have saved the requested
1637 * seek segment and don't want to overwrite it (remember that on a seek
1638 * we always just seek back to the start in BYTES format and just throw
1639 * away all text that's before the requested position; if the subtitles
1640 * come from an upstream demuxer, it won't be able to handle our BYTES
1641 * seek request and instead send us a newsegment from the seek request
1642 * it received via its video pads instead, so all is fine then too) */
1646 gst_event_unref (event);
1649 case GST_EVENT_FLUSH_START:
1651 self->flushing = TRUE;
1653 ret = gst_pad_event_default (pad, event);
1656 case GST_EVENT_FLUSH_STOP:
1658 self->flushing = FALSE;
1660 ret = gst_pad_event_default (pad, event);
1664 ret = gst_pad_event_default (pad, event);
1668 gst_object_unref (self);
1674 static GstStateChangeReturn
1675 gst_sub_parse_change_state (GstElement * element, GstStateChange transition)
1677 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
1678 GstSubParse *self = GST_SUBPARSE (element);
1680 switch (transition) {
1681 case GST_STATE_CHANGE_READY_TO_PAUSED:
1682 /* format detection will init the parser state */
1684 self->next_offset = 0;
1685 self->parser_type = GST_SUB_PARSE_FORMAT_UNKNOWN;
1686 self->valid_utf8 = TRUE;
1687 self->first_buffer = TRUE;
1688 g_free (self->detected_encoding);
1689 self->detected_encoding = NULL;
1690 g_string_truncate (self->textbuf, 0);
1691 gst_adapter_clear (self->adapter);
1697 ret = parent_class->change_state (element, transition);
1698 if (ret == GST_STATE_CHANGE_FAILURE)
1701 switch (transition) {
1702 case GST_STATE_CHANGE_PAUSED_TO_READY:
1703 parser_state_dispose (self, &self->state);
1704 self->parser_type = GST_SUB_PARSE_FORMAT_UNKNOWN;
1717 /* FIXME 0.11: these caps are ugly, use app/x-subtitle + type field or so;
1718 * also, give different subtitle formats really different types */
1719 static GstStaticCaps mpl2_caps =
1720 GST_STATIC_CAPS ("application/x-subtitle-mpl2");
1721 #define SUB_CAPS (gst_static_caps_get (&sub_caps))
1723 static GstStaticCaps tmp_caps =
1724 GST_STATIC_CAPS ("application/x-subtitle-tmplayer");
1725 #define TMP_CAPS (gst_static_caps_get (&tmp_caps))
1727 static GstStaticCaps sub_caps = GST_STATIC_CAPS ("application/x-subtitle");
1728 #define MPL2_CAPS (gst_static_caps_get (&mpl2_caps))
1730 #ifndef GST_DISABLE_XML
1731 static GstStaticCaps smi_caps = GST_STATIC_CAPS ("application/x-subtitle-sami");
1732 #define SAMI_CAPS (gst_static_caps_get (&smi_caps))
1735 static GstStaticCaps dks_caps = GST_STATIC_CAPS ("application/x-subtitle-dks");
1736 #define DKS_CAPS (gst_static_caps_get (&dks_caps))
1738 static GstStaticCaps qttext_caps =
1739 GST_STATIC_CAPS ("application/x-subtitle-qttext");
1740 #define QTTEXT_CAPS (gst_static_caps_get (&qttext_caps))
1743 gst_subparse_type_find (GstTypeFind * tf, gpointer private)
1745 GstSubParseFormat format;
1749 gchar *encoding = NULL;
1752 if (!(data = gst_type_find_peek (tf, 0, 129)))
1755 /* make sure string passed to _autodetect() is NUL-terminated */
1756 str = g_malloc0 (129);
1757 memcpy (str, data, 128);
1759 if ((encoding = detect_encoding (str, 128)) != NULL) {
1760 gchar *converted_str;
1764 converted_str = gst_convert_to_utf8 (str, 128, encoding, &tmp, &err);
1765 if (converted_str == NULL) {
1766 GST_DEBUG ("Encoding '%s' detected but conversion failed: %s", encoding,
1772 str = converted_str;
1777 /* Check if at least the first 120 chars are valid UTF8,
1778 * otherwise convert as always */
1779 if (!g_utf8_validate (str, 128, &end) && (end - str) < 120) {
1780 gchar *converted_str;
1785 enc = g_getenv ("GST_SUBTITLE_ENCODING");
1786 if (enc == NULL || *enc == '\0') {
1787 /* if local encoding is UTF-8 and no encoding specified
1788 * via the environment variable, assume ISO-8859-15 */
1789 if (g_get_charset (&enc)) {
1790 enc = "ISO-8859-15";
1793 converted_str = gst_convert_to_utf8 (str, 128, enc, &tmp, &err);
1794 if (converted_str == NULL) {
1795 GST_DEBUG ("Charset conversion failed: %s", err->message);
1801 str = converted_str;
1805 format = gst_sub_parse_data_format_autodetect (str);
1809 case GST_SUB_PARSE_FORMAT_MDVDSUB:
1810 GST_DEBUG ("MicroDVD format detected");
1813 case GST_SUB_PARSE_FORMAT_SUBRIP:
1814 GST_DEBUG ("SubRip format detected");
1817 case GST_SUB_PARSE_FORMAT_MPSUB:
1818 GST_DEBUG ("MPSub format detected");
1821 #ifndef GST_DISABLE_XML
1822 case GST_SUB_PARSE_FORMAT_SAMI:
1823 GST_DEBUG ("SAMI (time-based) format detected");
1827 case GST_SUB_PARSE_FORMAT_TMPLAYER:
1828 GST_DEBUG ("TMPlayer (time based) format detected");
1831 /* FIXME: our MPL2 typefinding is not really good enough to warrant
1832 * returning a high probability (however, since we registered our
1833 * typefinder here with a rank of MARGINAL we should pretty much only
1834 * be called if most other typefinders have already run */
1835 case GST_SUB_PARSE_FORMAT_MPL2:
1836 GST_DEBUG ("MPL2 (time based) format detected");
1839 case GST_SUB_PARSE_FORMAT_SUBVIEWER:
1840 GST_DEBUG ("SubViewer format detected");
1843 case GST_SUB_PARSE_FORMAT_DKS:
1844 GST_DEBUG ("DKS format detected");
1847 case GST_SUB_PARSE_FORMAT_QTTEXT:
1848 GST_DEBUG ("QTtext format detected");
1852 case GST_SUB_PARSE_FORMAT_UNKNOWN:
1853 GST_DEBUG ("no subtitle format detected");
1857 /* if we're here, it's ok */
1858 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, caps);
1862 plugin_init (GstPlugin * plugin)
1864 static gchar *sub_exts[] = { "srt", "sub", "mpsub", "mdvd", "smi", "txt",
1868 GST_DEBUG_CATEGORY_INIT (sub_parse_debug, "subparse", 0, ".sub parser");
1870 if (!gst_type_find_register (plugin, "subparse_typefind", GST_RANK_MARGINAL,
1871 gst_subparse_type_find, sub_exts, SUB_CAPS, NULL, NULL))
1874 if (!gst_element_register (plugin, "subparse",
1875 GST_RANK_PRIMARY, GST_TYPE_SUBPARSE) ||
1876 !gst_element_register (plugin, "ssaparse",
1877 GST_RANK_PRIMARY, GST_TYPE_SSA_PARSE)) {
1884 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
1888 plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)