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"
38 GST_DEBUG_CATEGORY (sub_parse_debug);
40 #define DEFAULT_ENCODING NULL
50 gst_sub_parse_set_property (GObject * object, guint prop_id,
51 const GValue * value, GParamSpec * pspec);
53 gst_sub_parse_get_property (GObject * object, guint prop_id,
54 GValue * value, GParamSpec * pspec);
57 static const GstElementDetails sub_parse_details =
58 GST_ELEMENT_DETAILS ("Subtitle parser",
59 "Codec/Parser/Subtitle",
60 "Parses subtitle (.sub) files into text streams",
61 "Gustavo J. A. M. Carneiro <gjc@inescporto.pt>\n"
62 "GStreamer maintainers <gstreamer-devel@lists.sourceforge.net>");
64 #ifndef GST_DISABLE_XML
65 static GstStaticPadTemplate sink_templ = GST_STATIC_PAD_TEMPLATE ("sink",
68 GST_STATIC_CAPS ("application/x-subtitle; application/x-subtitle-sami; "
69 "application/x-subtitle-tmplayer; application/x-subtitle-mpl2; "
70 "application/x-subtitle-dks")
73 static GstStaticPadTemplate sink_templ = GST_STATIC_PAD_TEMPLATE ("sink",
76 GST_STATIC_CAPS ("application/x-subtitle; application/x-subtitle-dks")
80 static GstStaticPadTemplate src_templ = GST_STATIC_PAD_TEMPLATE ("src",
83 GST_STATIC_CAPS ("text/plain; text/x-pango-markup")
86 static void gst_sub_parse_base_init (GstSubParseClass * klass);
87 static void gst_sub_parse_class_init (GstSubParseClass * klass);
88 static void gst_sub_parse_init (GstSubParse * subparse);
90 static gboolean gst_sub_parse_src_event (GstPad * pad, GstEvent * event);
91 static gboolean gst_sub_parse_src_query (GstPad * pad, GstQuery * query);
92 static gboolean gst_sub_parse_sink_event (GstPad * pad, GstEvent * event);
94 static GstStateChangeReturn gst_sub_parse_change_state (GstElement * element,
95 GstStateChange transition);
97 static GstFlowReturn gst_sub_parse_chain (GstPad * sinkpad, GstBuffer * buf);
99 static GstElementClass *parent_class = NULL;
102 gst_sub_parse_get_type (void)
104 static GType sub_parse_type = 0;
106 if (!sub_parse_type) {
107 static const GTypeInfo sub_parse_info = {
108 sizeof (GstSubParseClass),
109 (GBaseInitFunc) gst_sub_parse_base_init,
111 (GClassInitFunc) gst_sub_parse_class_init,
114 sizeof (GstSubParse),
116 (GInstanceInitFunc) gst_sub_parse_init,
119 sub_parse_type = g_type_register_static (GST_TYPE_ELEMENT,
120 "GstSubParse", &sub_parse_info, 0);
123 return sub_parse_type;
127 gst_sub_parse_base_init (GstSubParseClass * klass)
129 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
131 gst_element_class_add_pad_template (element_class,
132 gst_static_pad_template_get (&sink_templ));
133 gst_element_class_add_pad_template (element_class,
134 gst_static_pad_template_get (&src_templ));
135 gst_element_class_set_details (element_class, &sub_parse_details);
139 gst_sub_parse_dispose (GObject * object)
141 GstSubParse *subparse = GST_SUBPARSE (object);
143 GST_DEBUG_OBJECT (subparse, "cleaning up subtitle parser");
145 if (subparse->encoding) {
146 g_free (subparse->encoding);
147 subparse->encoding = NULL;
150 if (subparse->detected_encoding) {
151 g_free (subparse->detected_encoding);
152 subparse->detected_encoding = NULL;
155 if (subparse->adapter) {
156 g_object_unref (subparse->adapter);
157 subparse->adapter = NULL;
160 if (subparse->textbuf) {
161 g_string_free (subparse->textbuf, TRUE);
162 subparse->textbuf = NULL;
164 #ifndef GST_DISABLE_XML
165 sami_context_deinit (&subparse->state);
168 GST_CALL_PARENT (G_OBJECT_CLASS, dispose, (object));
172 gst_sub_parse_class_init (GstSubParseClass * klass)
174 GObjectClass *object_class = G_OBJECT_CLASS (klass);
175 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
177 parent_class = g_type_class_peek_parent (klass);
179 object_class->dispose = gst_sub_parse_dispose;
180 object_class->set_property = gst_sub_parse_set_property;
181 object_class->get_property = gst_sub_parse_get_property;
183 element_class->change_state = gst_sub_parse_change_state;
185 g_object_class_install_property (object_class, PROP_ENCODING,
186 g_param_spec_string ("subtitle-encoding", "subtitle charset encoding",
187 "Encoding to assume if input subtitles are not in UTF-8 or any other "
188 "Unicode encoding. If not set, the GST_SUBTITLE_ENCODING environment "
189 "variable will be checked for an encoding to use. If that is not set "
190 "either, ISO-8859-15 will be assumed.", DEFAULT_ENCODING,
191 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
193 g_object_class_install_property (object_class, PROP_VIDEOFPS,
194 g_param_spec_double ("video-fps", "Video framerate",
195 "Framerate of the video stream. This is needed by some subtitle "
196 "formats to synchronize subtitles and video properly. If not set "
197 "and the subtitle format requires it subtitles may be out of sync.",
198 0.0, 100.0, 0.0, G_PARAM_READWRITE));
202 gst_sub_parse_init (GstSubParse * subparse)
204 subparse->sinkpad = gst_pad_new_from_static_template (&sink_templ, "sink");
205 gst_pad_set_chain_function (subparse->sinkpad,
206 GST_DEBUG_FUNCPTR (gst_sub_parse_chain));
207 gst_pad_set_event_function (subparse->sinkpad,
208 GST_DEBUG_FUNCPTR (gst_sub_parse_sink_event));
209 gst_element_add_pad (GST_ELEMENT (subparse), subparse->sinkpad);
211 subparse->srcpad = gst_pad_new_from_static_template (&src_templ, "src");
212 gst_pad_set_event_function (subparse->srcpad,
213 GST_DEBUG_FUNCPTR (gst_sub_parse_src_event));
214 gst_pad_set_query_function (subparse->srcpad,
215 GST_DEBUG_FUNCPTR (gst_sub_parse_src_query));
216 gst_element_add_pad (GST_ELEMENT (subparse), subparse->srcpad);
218 subparse->textbuf = g_string_new (NULL);
219 subparse->parser_type = GST_SUB_PARSE_FORMAT_UNKNOWN;
220 subparse->flushing = FALSE;
221 gst_segment_init (&subparse->segment, GST_FORMAT_TIME);
222 subparse->need_segment = TRUE;
223 subparse->encoding = g_strdup (DEFAULT_ENCODING);
224 subparse->detected_encoding = NULL;
225 subparse->adapter = gst_adapter_new ();
229 * Source pad functions.
233 gst_sub_parse_src_query (GstPad * pad, GstQuery * query)
235 GstSubParse *self = GST_SUBPARSE (gst_pad_get_parent (pad));
236 gboolean ret = FALSE;
238 GST_DEBUG ("Handling %s query", GST_QUERY_TYPE_NAME (query));
240 switch (GST_QUERY_TYPE (query)) {
241 case GST_QUERY_POSITION:{
244 gst_query_parse_position (query, &fmt, NULL);
245 if (fmt != GST_FORMAT_TIME) {
246 ret = gst_pad_peer_query (self->sinkpad, query);
249 gst_query_set_position (query, GST_FORMAT_TIME,
250 self->segment.last_stop);
253 case GST_QUERY_SEEKING:
256 gboolean seekable = FALSE;
260 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
261 if (fmt == GST_FORMAT_TIME) {
262 GstQuery *peerquery = gst_query_new_seeking (GST_FORMAT_BYTES);
264 seekable = gst_pad_peer_query (self->sinkpad, peerquery);
266 gst_query_parse_seeking (peerquery, NULL, &seekable, NULL, NULL);
267 gst_query_unref (peerquery);
270 gst_query_set_seeking (query, fmt, seekable, seekable ? 0 : -1, -1);
275 ret = gst_pad_peer_query (self->sinkpad, query);
279 gst_object_unref (self);
285 gst_sub_parse_src_event (GstPad * pad, GstEvent * event)
287 GstSubParse *self = GST_SUBPARSE (gst_pad_get_parent (pad));
288 gboolean ret = FALSE;
290 GST_DEBUG ("Handling %s event", GST_EVENT_TYPE_NAME (event));
292 switch (GST_EVENT_TYPE (event)) {
296 GstSeekType start_type, stop_type;
301 gst_event_parse_seek (event, &rate, &format, &self->segment_flags,
302 &start_type, &start, &stop_type, &stop);
304 if (format != GST_FORMAT_TIME) {
305 GST_WARNING_OBJECT (self, "we only support seeking in TIME format");
306 gst_event_unref (event);
310 /* Convert that seek to a seeking in bytes at position 0,
311 FIXME: could use an index */
312 ret = gst_pad_push_event (self->sinkpad,
313 gst_event_new_seek (rate, GST_FORMAT_BYTES, self->segment_flags,
314 GST_SEEK_TYPE_SET, 0, GST_SEEK_TYPE_NONE, 0));
317 /* Apply the seek to our segment */
318 gst_segment_set_seek (&self->segment, rate, format, self->segment_flags,
319 start_type, start, stop_type, stop, &update);
321 GST_DEBUG_OBJECT (self, "segment after seek: %" GST_SEGMENT_FORMAT,
324 self->next_offset = 0;
326 self->need_segment = TRUE;
328 GST_WARNING_OBJECT (self, "seek to 0 bytes failed");
331 gst_event_unref (event);
335 ret = gst_pad_event_default (pad, event);
340 gst_object_unref (self);
346 gst_sub_parse_set_property (GObject * object, guint prop_id,
347 const GValue * value, GParamSpec * pspec)
349 GstSubParse *subparse = GST_SUBPARSE (object);
351 GST_OBJECT_LOCK (subparse);
354 g_free (subparse->encoding);
355 subparse->encoding = g_value_dup_string (value);
356 GST_LOG_OBJECT (object, "subtitle encoding set to %s",
357 GST_STR_NULL (subparse->encoding));
361 subparse->fps = g_value_get_double (value);
362 GST_DEBUG_OBJECT (object, "video framerate set to %.2f", subparse->fps);
366 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
369 GST_OBJECT_UNLOCK (subparse);
373 gst_sub_parse_get_property (GObject * object, guint prop_id,
374 GValue * value, GParamSpec * pspec)
376 GstSubParse *subparse = GST_SUBPARSE (object);
378 GST_OBJECT_LOCK (subparse);
381 g_value_set_string (value, subparse->encoding);
384 g_value_set_double (value, subparse->fps);
387 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
390 GST_OBJECT_UNLOCK (subparse);
394 gst_sub_parse_get_format_description (GstSubParseFormat format)
397 case GST_SUB_PARSE_FORMAT_MDVDSUB:
399 case GST_SUB_PARSE_FORMAT_SUBRIP:
401 case GST_SUB_PARSE_FORMAT_MPSUB:
403 case GST_SUB_PARSE_FORMAT_SAMI:
405 case GST_SUB_PARSE_FORMAT_TMPLAYER:
407 case GST_SUB_PARSE_FORMAT_MPL2:
409 case GST_SUB_PARSE_FORMAT_SUBVIEWER:
411 case GST_SUB_PARSE_FORMAT_DKS:
414 case GST_SUB_PARSE_FORMAT_UNKNOWN:
421 gst_convert_to_utf8 (const gchar * str, gsize len, const gchar * encoding,
422 gsize * consumed, GError ** err)
428 g_convert_with_fallback (str, len, "UTF-8", encoding, "*", consumed, NULL,
433 /* + 3 to skip UTF-8 BOM if it was added */
435 if (len >= 3 && (guint8) ret[0] == 0xEF && (guint8) ret[1] == 0xBB
436 && (guint8) ret[2] == 0xBF)
437 g_memmove (ret, ret + 3, len + 1 - 3);
443 detect_encoding (const gchar * str, gsize len)
445 if (len >= 3 && (guint8) str[0] == 0xEF && (guint8) str[1] == 0xBB
446 && (guint8) str[2] == 0xBF)
447 return g_strdup ("UTF-8");
449 if (len >= 2 && (guint8) str[0] == 0xFE && (guint8) str[1] == 0xFF)
450 return g_strdup ("UTF-16BE");
452 if (len >= 2 && (guint8) str[0] == 0xFF && (guint8) str[1] == 0xFE)
453 return g_strdup ("UTF-16LE");
455 if (len >= 4 && (guint8) str[0] == 0x00 && (guint8) str[1] == 0x00
456 && (guint8) str[2] == 0xFE && (guint8) str[3] == 0xFF)
457 return g_strdup ("UTF-32BE");
459 if (len >= 4 && (guint8) str[0] == 0xFF && (guint8) str[1] == 0xFE
460 && (guint8) str[2] == 0x00 && (guint8) str[3] == 0x00)
461 return g_strdup ("UTF-32LE");
467 convert_encoding (GstSubParse * self, const gchar * str, gsize len,
470 const gchar *encoding;
476 /* First try any detected encoding */
477 if (self->detected_encoding) {
479 gst_convert_to_utf8 (str, len, self->detected_encoding, consumed, &err);
484 GST_WARNING_OBJECT (self, "could not convert string from '%s' to UTF-8: %s",
485 self->detected_encoding, err->message);
486 g_free (self->detected_encoding);
487 self->detected_encoding = NULL;
491 /* Otherwise check if it's UTF8 */
492 if (self->valid_utf8) {
493 if (g_utf8_validate (str, len, NULL)) {
494 GST_LOG_OBJECT (self, "valid UTF-8, no conversion needed");
496 return g_strndup (str, len);
498 GST_INFO_OBJECT (self, "invalid UTF-8!");
499 self->valid_utf8 = FALSE;
502 /* Else try fallback */
503 encoding = self->encoding;
504 if (encoding == NULL || *encoding == '\0') {
505 encoding = g_getenv ("GST_SUBTITLE_ENCODING");
507 if (encoding == NULL || *encoding == '\0') {
508 /* if local encoding is UTF-8 and no encoding specified
509 * via the environment variable, assume ISO-8859-15 */
510 if (g_get_charset (&encoding)) {
511 encoding = "ISO-8859-15";
515 ret = gst_convert_to_utf8 (str, len, encoding, consumed, &err);
518 GST_WARNING_OBJECT (self, "could not convert string from '%s' to UTF-8: %s",
519 encoding, err->message);
522 /* invalid input encoding, fall back to ISO-8859-15 (always succeeds) */
523 ret = gst_convert_to_utf8 (str, len, "ISO-8859-15", consumed, NULL);
526 GST_LOG_OBJECT (self,
527 "successfully converted %" G_GSIZE_FORMAT " characters from %s to UTF-8"
528 "%s", len, encoding, (err) ? " , using ISO-8859-15 as fallback" : "");
534 get_next_line (GstSubParse * self)
537 const char *line_end;
539 gboolean have_r = FALSE;
541 line_end = strchr (self->textbuf->str, '\n');
544 /* end-of-line not found; return for more data */
548 /* get rid of '\r' */
549 if (line_end != self->textbuf->str && *(line_end - 1) == '\r') {
554 line_len = line_end - self->textbuf->str;
555 line = g_strndup (self->textbuf->str, line_len);
556 self->textbuf = g_string_erase (self->textbuf, 0,
557 line_len + (have_r ? 2 : 1));
562 parse_mdvdsub (ParserState * state, const gchar * line)
564 const gchar *line_split;
566 guint start_frame, end_frame;
567 gint64 clip_start = 0, clip_stop = 0;
568 gboolean in_seg = FALSE;
572 /* style variables */
577 if (sscanf (line, "{%u}{%u}", &start_frame, &end_frame) != 2) {
578 g_warning ("Parse of the following line, assumed to be in microdvd .sub"
579 " format, failed:\n%s", line);
583 /* skip the {%u}{%u} part */
584 line = strchr (line, '}') + 1;
585 line = strchr (line, '}') + 1;
587 /* see if there's a first line with a framerate */
588 if (state->fps == 0.0 && start_frame == 1 && end_frame == 1) {
589 gchar *rest, *end = NULL;
591 rest = g_strdup (line);
592 g_strdelimit (rest, ",", '.');
593 state->fps = g_ascii_strtod (rest, &end);
596 GST_INFO ("framerate from file: %f ('%s')", state->fps, rest);
601 if (state->fps == 0.0) {
602 /* FIXME: hardcoded for now, is there a better way/assumption? */
603 state->fps = 24000.0 / 1001.0;
604 GST_INFO ("no framerate specified, assuming %f", state->fps);
607 state->start_time = start_frame / state->fps * GST_SECOND;
608 state->duration = (end_frame - start_frame) / state->fps * GST_SECOND;
610 /* Check our segment start/stop */
611 in_seg = gst_segment_clip (state->segment, GST_FORMAT_TIME,
612 state->start_time, state->start_time + state->duration, &clip_start,
615 /* No need to parse that text if it's out of segment */
617 state->start_time = clip_start;
618 state->duration = clip_stop - clip_start;
623 markup = g_string_new (NULL);
628 /* parse style markup */
629 if (strncmp (line, "{y:i}", 5) == 0) {
631 line = strchr (line, '}') + 1;
633 if (strncmp (line, "{y:b}", 5) == 0) {
635 line = strchr (line, '}') + 1;
637 if (sscanf (line, "{s:%u}", &fontsize) == 1) {
638 line = strchr (line, '}') + 1;
640 /* forward slashes at beginning/end signify italics too */
641 if (g_str_has_prefix (line, "/")) {
645 if ((line_split = strchr (line, '|')))
646 line_chunk = g_markup_escape_text (line, line_split - line);
648 line_chunk = g_markup_escape_text (line, strlen (line));
650 /* Remove italics markers at end of line/stanza (CHECKME: are end slashes
651 * always at the end of a line or can they span multiple lines?) */
652 if (g_str_has_suffix (line_chunk, "/")) {
653 line_chunk[strlen (line_chunk) - 1] = '\0';
656 markup = g_string_append (markup, "<span");
658 g_string_append (markup, " style=\"italic\"");
660 g_string_append (markup, " weight=\"bold\"");
662 g_string_append_printf (markup, " size=\"%u\"", fontsize * 1000);
663 g_string_append_printf (markup, ">%s</span>", line_chunk);
666 g_string_append (markup, "\n");
667 line = line_split + 1;
673 g_string_free (markup, FALSE);
674 GST_DEBUG ("parse_mdvdsub returning (%f+%f): %s",
675 state->start_time / (double) GST_SECOND,
676 state->duration / (double) GST_SECOND, ret);
681 strip_trailing_newlines (gchar * txt)
687 while (len > 1 && txt[len - 1] == '\n') {
694 /* we want to escape text in general, but retain basic markup like
695 * <i></i>, <u></u>, and <b></b>. The easiest and safest way is to
696 * just unescape a white list of allowed markups again after
697 * escaping everything (the text between these simple markers isn't
698 * necessarily escaped, so it seems best to do it like this) */
700 subrip_unescape_formatting (gchar * txt)
704 for (pos = txt; pos != NULL && *pos != '\0'; ++pos) {
705 if (g_ascii_strncasecmp (pos, "<u>", 9) == 0 ||
706 g_ascii_strncasecmp (pos, "<i>", 9) == 0 ||
707 g_ascii_strncasecmp (pos, "<b>", 9) == 0) {
709 pos[1] = g_ascii_tolower (pos[4]);
711 /* move NUL terminator as well */
712 g_memmove (pos + 3, pos + 9, strlen (pos + 9) + 1);
717 for (pos = txt; pos != NULL && *pos != '\0'; ++pos) {
718 if (g_ascii_strncasecmp (pos, "</u>", 10) == 0 ||
719 g_ascii_strncasecmp (pos, "</i>", 10) == 0 ||
720 g_ascii_strncasecmp (pos, "</b>", 10) == 0) {
723 pos[2] = g_ascii_tolower (pos[5]);
725 /* move NUL terminator as well */
726 g_memmove (pos + 4, pos + 10, strlen (pos + 10) + 1);
734 subrip_remove_unhandled_tag (gchar * start, gchar * stop)
738 tag = start + strlen ("<");
742 if (g_ascii_tolower (*tag) < 'a' || g_ascii_tolower (*tag) > 'z')
747 GST_LOG ("removing unhandled tag '%s'", start);
749 g_memmove (start, stop, strlen (stop) + 1);
753 /* remove tags we haven't explicitly allowed earlier on, like font tags
756 subrip_remove_unhandled_tags (gchar * txt)
760 for (pos = txt; pos != NULL && *pos != '\0'; ++pos) {
761 if (strncmp (pos, "<", 4) == 0 && (gt = strstr (pos + 4, ">"))) {
762 if (subrip_remove_unhandled_tag (pos, gt + strlen (">")))
768 /* we only allow <i>, <u> and <b>, so let's take a simple approach. This code
769 * assumes the input has been escaped and subrip_unescape_formatting() has then
770 * been run over the input! This function adds missing closing markup tags and
771 * removes broken closing tags for tags that have never been opened. */
773 subrip_fix_up_markup (gchar ** p_txt)
775 gchar *cur, *next_tag;
777 guint num_open_tags = 0;
779 g_assert (*p_txt != NULL);
782 while (*cur != '\0') {
783 next_tag = strchr (cur, '<');
784 if (next_tag == NULL)
790 if (num_open_tags == 0 || open_tags[num_open_tags - 1] != *next_tag) {
791 GST_LOG ("broken input, closing tag '%c' is not open", *next_tag);
792 g_memmove (next_tag - 2, next_tag + 2, strlen (next_tag + 2) + 1);
795 /* it's all good, closing tag which is open */
803 if (num_open_tags == G_N_ELEMENTS (open_tags))
804 return; /* something dodgy is going on, stop parsing */
805 open_tags[num_open_tags] = *next_tag;
809 GST_ERROR ("unexpected tag '%c' (%s)", *next_tag, next_tag);
810 g_assert_not_reached ();
816 if (num_open_tags > 0) {
819 s = g_string_new (*p_txt);
820 while (num_open_tags > 0) {
821 GST_LOG ("adding missing closing tag '%c'", open_tags[num_open_tags - 1]);
822 g_string_append_c (s, '<');
823 g_string_append_c (s, '/');
824 g_string_append_c (s, open_tags[num_open_tags - 1]);
825 g_string_append_c (s, '>');
829 *p_txt = g_string_free (s, FALSE);
834 parse_subrip_time (const gchar * ts_string, GstClockTime * t)
836 gchar s[128] = { '\0', };
838 guint hour, min, sec, msec, len;
840 while (*ts_string == ' ')
843 g_strlcpy (s, ts_string, sizeof (s));
844 if ((end = strstr (s, "-->")))
848 /* ms may be in these formats:
849 * hh:mm:ss,500 = 500ms
852 * hh:mm:ss, 50 = 50ms
854 * and the same with . instead of ,.
855 * sscanf() doesn't differentiate between ' 5' and '5' so munge
856 * the white spaces within the timestamp to '0' (I'm sure there's a
857 * way to make sscanf() do this for us, but how?)
859 g_strdelimit (s, " ", '0');
860 g_strdelimit (s, ".", ',');
862 /* make sure we have exactly three digits after he comma */
864 g_assert (p != NULL);
871 g_strlcat (&p[len], "0", 2);
875 GST_LOG ("parsing timestamp '%s'", s);
876 if (sscanf (s, "%u:%u:%u,%u", &hour, &min, &sec, &msec) != 4) {
877 GST_WARNING ("failed to parse subrip timestamp string '%s'", s);
881 *t = ((hour * 3600) + (min * 60) + sec) * GST_SECOND + msec * GST_MSECOND;
886 parse_subrip (ParserState * state, const gchar * line)
891 switch (state->state) {
893 /* looking for a single integer */
894 if (sscanf (line, "%u", &subnum) == 1)
899 GstClockTime ts_start, ts_end;
902 /* looking for start_time --> end_time */
903 if ((end_time = strstr (line, " --> ")) &&
904 parse_subrip_time (line, &ts_start) &&
905 parse_subrip_time (end_time + strlen (" --> "), &ts_end) &&
906 state->start_time <= ts_end) {
908 state->start_time = ts_start;
909 state->duration = ts_end - ts_start;
911 GST_DEBUG ("error parsing subrip time line '%s'", line);
918 /* No need to parse that text if it's out of segment */
919 gint64 clip_start = 0, clip_stop = 0;
920 gboolean in_seg = FALSE;
922 /* Check our segment start/stop */
923 in_seg = gst_segment_clip (state->segment, GST_FORMAT_TIME,
924 state->start_time, state->start_time + state->duration,
925 &clip_start, &clip_stop);
928 state->start_time = clip_start;
929 state->duration = clip_stop - clip_start;
935 /* looking for subtitle text; empty line ends this subtitle entry */
937 g_string_append_c (state->buf, '\n');
938 g_string_append (state->buf, line);
939 if (strlen (line) == 0) {
940 ret = g_markup_escape_text (state->buf->str, state->buf->len);
941 g_string_truncate (state->buf, 0);
943 subrip_unescape_formatting (ret);
944 subrip_remove_unhandled_tags (ret);
945 strip_trailing_newlines (ret);
946 subrip_fix_up_markup (&ret);
951 g_return_val_if_reached (NULL);
956 unescape_newlines_br (gchar * read)
960 /* Replace all occurences of '[br]' with a newline as version 2
961 * of the subviewer format uses this for newlines */
963 if (read[0] == '\0' || read[1] == '\0' || read[2] == '\0' || read[3] == '\0')
967 if (strncmp (read, "[br]", 4) == 0) {
981 parse_subviewer (ParserState * state, const gchar * line)
983 guint h1, m1, s1, ms1;
984 guint h2, m2, s2, ms2;
987 /* TODO: Maybe also parse the fields in the header, especially DELAY.
988 * For examples see the unit test or
989 * http://www.doom9.org/index.html?/sub.htm */
991 switch (state->state) {
993 /* looking for start_time,end_time */
994 if (sscanf (line, "%u:%u:%u.%u,%u:%u:%u.%u",
995 &h1, &m1, &s1, &ms1, &h2, &m2, &s2, &ms2) == 8) {
998 (((guint64) h1) * 3600 + m1 * 60 + s1) * GST_SECOND +
1001 (((guint64) h2) * 3600 + m2 * 60 + s2) * GST_SECOND +
1002 ms2 * GST_MSECOND - state->start_time;
1007 /* No need to parse that text if it's out of segment */
1008 gint64 clip_start = 0, clip_stop = 0;
1009 gboolean in_seg = FALSE;
1011 /* Check our segment start/stop */
1012 in_seg = gst_segment_clip (state->segment, GST_FORMAT_TIME,
1013 state->start_time, state->start_time + state->duration,
1014 &clip_start, &clip_stop);
1017 state->start_time = clip_start;
1018 state->duration = clip_stop - clip_start;
1024 /* looking for subtitle text; empty line ends this subtitle entry */
1025 if (state->buf->len)
1026 g_string_append_c (state->buf, '\n');
1027 g_string_append (state->buf, line);
1028 if (strlen (line) == 0) {
1029 ret = g_strdup (state->buf->str);
1030 unescape_newlines_br (ret);
1031 strip_trailing_newlines (ret);
1032 g_string_truncate (state->buf, 0);
1038 g_assert_not_reached ();
1044 parse_mpsub (ParserState * state, const gchar * line)
1049 switch (state->state) {
1051 /* looking for two floats (offset, duration) */
1052 if (sscanf (line, "%f %f", &t1, &t2) == 2) {
1054 state->start_time += state->duration + GST_SECOND * t1;
1055 state->duration = GST_SECOND * t2;
1059 { /* No need to parse that text if it's out of segment */
1060 gint64 clip_start = 0, clip_stop = 0;
1061 gboolean in_seg = FALSE;
1063 /* Check our segment start/stop */
1064 in_seg = gst_segment_clip (state->segment, GST_FORMAT_TIME,
1065 state->start_time, state->start_time + state->duration,
1066 &clip_start, &clip_stop);
1069 state->start_time = clip_start;
1070 state->duration = clip_stop - clip_start;
1076 /* looking for subtitle text; empty line ends this
1078 if (state->buf->len)
1079 g_string_append_c (state->buf, '\n');
1080 g_string_append (state->buf, line);
1081 if (strlen (line) == 0) {
1082 ret = g_strdup (state->buf->str);
1083 g_string_truncate (state->buf, 0);
1089 g_assert_not_reached ();
1094 static const gchar *
1095 dks_skip_timestamp (const gchar * line)
1097 while (*line && *line != ']')
1105 parse_dks (ParserState * state, const gchar * line)
1109 switch (state->state) {
1111 /* Looking for the start time and text */
1112 if (sscanf (line, "[%u:%u:%u]", &h, &m, &s) == 3) {
1114 state->start_time = (((guint64) h) * 3600 + m * 60 + s) * GST_SECOND;
1115 text = dks_skip_timestamp (line);
1118 g_string_append (state->buf, text);
1124 gint64 clip_start = 0, clip_stop = 0;
1128 /* Looking for the end time */
1129 if (sscanf (line, "[%u:%u:%u]", &h, &m, &s) == 3) {
1131 state->duration = (((guint64) h) * 3600 + m * 60 + s) * GST_SECOND -
1134 GST_WARNING ("Failed to parse subtitle end time");
1138 /* Check if this subtitle is out of the current segment */
1139 in_seg = gst_segment_clip (state->segment, GST_FORMAT_TIME,
1140 state->start_time, state->start_time + state->duration,
1141 &clip_start, &clip_stop);
1147 state->start_time = clip_start;
1148 state->duration = clip_stop - clip_start;
1150 ret = g_strdup (state->buf->str);
1151 g_string_truncate (state->buf, 0);
1152 unescape_newlines_br (ret);
1156 g_assert_not_reached ();
1162 parser_state_init (ParserState * state)
1164 GST_DEBUG ("initialising parser");
1167 g_string_truncate (state->buf, 0);
1169 state->buf = g_string_new (NULL);
1172 state->start_time = 0;
1173 state->duration = 0;
1174 state->max_duration = 0; /* no limit */
1176 state->segment = NULL;
1180 parser_state_dispose (ParserState * state)
1183 g_string_free (state->buf, TRUE);
1186 #ifndef GST_DISABLE_XML
1187 if (state->user_data) {
1188 sami_context_reset (state);
1193 /* regex type enum */
1196 GST_SUB_PARSE_REGEX_UNKNOWN = 0,
1197 GST_SUB_PARSE_REGEX_MDVDSUB = 1,
1198 GST_SUB_PARSE_REGEX_SUBRIP = 2,
1199 GST_SUB_PARSE_REGEX_DKS = 3,
1203 gst_sub_parse_data_format_autodetect_regex_once (GstSubParseRegex regtype)
1205 gpointer result = NULL;
1206 GError *gerr = NULL;
1208 case GST_SUB_PARSE_REGEX_MDVDSUB:
1210 (gpointer) g_regex_new ("^\\{[0-9]+\\}\\{[0-9]+\\}", 0, 0, &gerr);
1211 if (result == NULL) {
1212 g_warning ("Compilation of mdvd regex failed: %s", gerr->message);
1213 g_error_free (gerr);
1216 case GST_SUB_PARSE_REGEX_SUBRIP:
1217 result = (gpointer) g_regex_new ("^([ 0-9]){0,3}[0-9]\\s*(\x0d)?\x0a"
1218 "[ 0-9][0-9]:[ 0-9][0-9]:[ 0-9][0-9][,.][ 0-9]{0,2}[0-9]"
1219 " +--> +([ 0-9])?[0-9]:[ 0-9][0-9]:[ 0-9][0-9][,.][ 0-9]{0,2}[0-9]",
1221 if (result == NULL) {
1222 g_warning ("Compilation of subrip regex failed: %s", gerr->message);
1223 g_error_free (gerr);
1226 case GST_SUB_PARSE_REGEX_DKS:
1227 result = (gpointer) g_regex_new ("^\[[0-9]+:[0-9]+:[0-9]+].*",
1229 if (result == NULL) {
1230 g_warning ("Compilation of dks regex failed: %s", gerr->message);
1231 g_error_free (gerr);
1235 GST_WARNING ("Trying to allocate regex of unknown type %u", regtype);
1241 * FIXME: maybe we should pass along a second argument, the preceding
1242 * text buffer, because that is how this originally worked, even though
1243 * I don't really see the use of that.
1246 static GstSubParseFormat
1247 gst_sub_parse_data_format_autodetect (gchar * match_str)
1251 static GOnce mdvd_rx_once = G_ONCE_INIT;
1252 static GOnce subrip_rx_once = G_ONCE_INIT;
1253 static GOnce dks_rx_once = G_ONCE_INIT;
1259 g_once (&mdvd_rx_once,
1260 (GThreadFunc) gst_sub_parse_data_format_autodetect_regex_once,
1261 (gpointer) GST_SUB_PARSE_REGEX_MDVDSUB);
1262 g_once (&subrip_rx_once,
1263 (GThreadFunc) gst_sub_parse_data_format_autodetect_regex_once,
1264 (gpointer) GST_SUB_PARSE_REGEX_SUBRIP);
1265 g_once (&dks_rx_once,
1266 (GThreadFunc) gst_sub_parse_data_format_autodetect_regex_once,
1267 (gpointer) GST_SUB_PARSE_REGEX_DKS);
1269 mdvd_grx = (GRegex *) mdvd_rx_once.retval;
1270 subrip_grx = (GRegex *) subrip_rx_once.retval;
1271 dks_grx = (GRegex *) dks_rx_once.retval;
1273 if (g_regex_match (mdvd_grx, match_str, 0, NULL) == TRUE) {
1274 GST_LOG ("MicroDVD (frame based) format detected");
1275 return GST_SUB_PARSE_FORMAT_MDVDSUB;
1277 if (g_regex_match (subrip_grx, match_str, 0, NULL) == TRUE) {
1278 GST_LOG ("SubRip (time based) format detected");
1279 return GST_SUB_PARSE_FORMAT_SUBRIP;
1281 if (g_regex_match (dks_grx, match_str, 0, NULL) == TRUE) {
1282 GST_LOG ("DKS (time based) format detected");
1283 return GST_SUB_PARSE_FORMAT_DKS;
1286 if (!strncmp (match_str, "FORMAT=TIME", 11)) {
1287 GST_LOG ("MPSub (time based) format detected");
1288 return GST_SUB_PARSE_FORMAT_MPSUB;
1290 #ifndef GST_DISABLE_XML
1291 if (strstr (match_str, "<SAMI>") != NULL ||
1292 strstr (match_str, "<sami>") != NULL) {
1293 GST_LOG ("SAMI (time based) format detected");
1294 return GST_SUB_PARSE_FORMAT_SAMI;
1297 /* we're boldly assuming the first subtitle appears within the first hour */
1298 if (sscanf (match_str, "0:%02u:%02u:", &n1, &n2) == 2 ||
1299 sscanf (match_str, "0:%02u:%02u=", &n1, &n2) == 2 ||
1300 sscanf (match_str, "00:%02u:%02u:", &n1, &n2) == 2 ||
1301 sscanf (match_str, "00:%02u:%02u=", &n1, &n2) == 2 ||
1302 sscanf (match_str, "00:%02u:%02u,%u=", &n1, &n2, &n3) == 3) {
1303 GST_LOG ("TMPlayer (time based) format detected");
1304 return GST_SUB_PARSE_FORMAT_TMPLAYER;
1306 if (sscanf (match_str, "[%u][%u]", &n1, &n2) == 2) {
1307 GST_LOG ("MPL2 (time based) format detected");
1308 return GST_SUB_PARSE_FORMAT_MPL2;
1310 if (strstr (match_str, "[INFORMATION]") != NULL) {
1311 GST_LOG ("SubViewer (time based) format detected");
1312 return GST_SUB_PARSE_FORMAT_SUBVIEWER;
1315 GST_DEBUG ("no subtitle format detected");
1316 return GST_SUB_PARSE_FORMAT_UNKNOWN;
1320 gst_sub_parse_format_autodetect (GstSubParse * self)
1323 GstSubParseFormat format;
1325 if (strlen (self->textbuf->str) < 30) {
1326 GST_DEBUG ("File too small to be a subtitles file");
1330 data = g_strndup (self->textbuf->str, 35);
1331 format = gst_sub_parse_data_format_autodetect (data);
1334 self->parser_type = format;
1335 self->subtitle_codec = gst_sub_parse_get_format_description (format);
1336 parser_state_init (&self->state);
1339 case GST_SUB_PARSE_FORMAT_MDVDSUB:
1340 self->parse_line = parse_mdvdsub;
1341 return gst_caps_new_simple ("text/x-pango-markup", NULL);
1342 case GST_SUB_PARSE_FORMAT_SUBRIP:
1343 self->parse_line = parse_subrip;
1344 return gst_caps_new_simple ("text/x-pango-markup", NULL);
1345 case GST_SUB_PARSE_FORMAT_MPSUB:
1346 self->parse_line = parse_mpsub;
1347 return gst_caps_new_simple ("text/plain", NULL);
1348 #ifndef GST_DISABLE_XML
1349 case GST_SUB_PARSE_FORMAT_SAMI:
1350 self->parse_line = parse_sami;
1351 sami_context_init (&self->state);
1352 return gst_caps_new_simple ("text/x-pango-markup", NULL);
1354 case GST_SUB_PARSE_FORMAT_TMPLAYER:
1355 self->parse_line = parse_tmplayer;
1356 self->state.max_duration = 5 * GST_SECOND;
1357 return gst_caps_new_simple ("text/plain", NULL);
1358 case GST_SUB_PARSE_FORMAT_MPL2:
1359 self->parse_line = parse_mpl2;
1360 return gst_caps_new_simple ("text/x-pango-markup", NULL);
1361 case GST_SUB_PARSE_FORMAT_DKS:
1362 self->parse_line = parse_dks;
1363 return gst_caps_new_simple ("text/plain", NULL);
1364 case GST_SUB_PARSE_FORMAT_SUBVIEWER:
1365 self->parse_line = parse_subviewer;
1366 return gst_caps_new_simple ("text/plain", NULL);
1367 case GST_SUB_PARSE_FORMAT_UNKNOWN:
1369 GST_DEBUG ("no subtitle format detected");
1370 GST_ELEMENT_ERROR (self, STREAM, WRONG_TYPE,
1371 ("The input is not a valid/supported subtitle file"), (NULL));
1377 feed_textbuf (GstSubParse * self, GstBuffer * buf)
1381 gchar *input = NULL;
1383 discont = GST_BUFFER_IS_DISCONT (buf);
1385 if (GST_BUFFER_OFFSET_IS_VALID (buf) &&
1386 GST_BUFFER_OFFSET (buf) != self->offset) {
1387 self->offset = GST_BUFFER_OFFSET (buf);
1392 GST_INFO ("discontinuity");
1393 /* flush the parser state */
1394 parser_state_init (&self->state);
1395 g_string_truncate (self->textbuf, 0);
1396 gst_adapter_clear (self->adapter);
1397 #ifndef GST_DISABLE_XML
1398 sami_context_reset (&self->state);
1400 /* we could set a flag to make sure that the next buffer we push out also
1401 * has the DISCONT flag set, but there's no point really given that it's
1402 * subtitles which are discontinuous by nature. */
1405 self->offset = GST_BUFFER_OFFSET (buf) + GST_BUFFER_SIZE (buf);
1406 self->next_offset = self->offset;
1408 gst_adapter_push (self->adapter, buf);
1411 convert_encoding (self, (const gchar *) gst_adapter_peek (self->adapter,
1412 gst_adapter_available (self->adapter)),
1413 (gsize) gst_adapter_available (self->adapter), &consumed);
1415 if (input && consumed > 0) {
1416 self->textbuf = g_string_append (self->textbuf, input);
1417 gst_adapter_flush (self->adapter, consumed);
1423 static GstFlowReturn
1424 handle_buffer (GstSubParse * self, GstBuffer * buf)
1426 GstFlowReturn ret = GST_FLOW_OK;
1427 GstCaps *caps = NULL;
1428 gchar *line, *subtitle;
1430 if (self->first_buffer) {
1431 self->detected_encoding =
1432 detect_encoding ((gchar *) GST_BUFFER_DATA (buf),
1433 GST_BUFFER_SIZE (buf));
1434 self->first_buffer = FALSE;
1435 self->state.fps = self->fps;
1438 feed_textbuf (self, buf);
1440 /* make sure we know the format */
1441 if (G_UNLIKELY (self->parser_type == GST_SUB_PARSE_FORMAT_UNKNOWN)) {
1442 if (!(caps = gst_sub_parse_format_autodetect (self))) {
1443 return GST_FLOW_UNEXPECTED;
1445 if (!gst_pad_set_caps (self->srcpad, caps)) {
1446 gst_caps_unref (caps);
1447 return GST_FLOW_UNEXPECTED;
1449 gst_caps_unref (caps);
1452 if (self->subtitle_codec != NULL) {
1455 tags = gst_tag_list_new ();
1456 gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_SUBTITLE_CODEC,
1457 self->subtitle_codec, NULL);
1458 gst_element_found_tags_for_pad (GST_ELEMENT (self), self->srcpad, tags);
1462 while (!self->flushing && (line = get_next_line (self))) {
1465 /* Set segment on our parser state machine */
1466 self->state.segment = &self->segment;
1467 /* Now parse the line, out of segment lines will just return NULL */
1468 GST_LOG_OBJECT (self, "Parsing line '%s'", line + offset);
1469 subtitle = self->parse_line (&self->state, line + offset);
1473 guint subtitle_len = strlen (subtitle);
1475 /* +1 for terminating NUL character */
1476 ret = gst_pad_alloc_buffer_and_set_caps (self->srcpad,
1477 GST_BUFFER_OFFSET_NONE, subtitle_len + 1,
1478 GST_PAD_CAPS (self->srcpad), &buf);
1480 if (ret == GST_FLOW_OK) {
1481 /* copy terminating NUL character as well */
1482 memcpy (GST_BUFFER_DATA (buf), subtitle, subtitle_len + 1);
1483 GST_BUFFER_SIZE (buf) = subtitle_len;
1484 GST_BUFFER_TIMESTAMP (buf) = self->state.start_time;
1485 GST_BUFFER_DURATION (buf) = self->state.duration;
1487 /* in some cases (e.g. tmplayer) we can only determine the duration
1488 * of a text chunk from the timestamp of the next text chunk; in those
1489 * cases, we probably want to limit the duration to something
1490 * reasonable, so we don't end up showing some text for e.g. 40 seconds
1491 * just because nothing else is being said during that time */
1492 if (self->state.max_duration > 0 && GST_BUFFER_DURATION_IS_VALID (buf)) {
1493 if (GST_BUFFER_DURATION (buf) > self->state.max_duration)
1494 GST_BUFFER_DURATION (buf) = self->state.max_duration;
1497 gst_segment_set_last_stop (&self->segment, GST_FORMAT_TIME,
1498 self->state.start_time);
1500 GST_DEBUG_OBJECT (self, "Sending text '%s', %" GST_TIME_FORMAT " + %"
1501 GST_TIME_FORMAT, subtitle, GST_TIME_ARGS (self->state.start_time),
1502 GST_TIME_ARGS (self->state.duration));
1504 ret = gst_pad_push (self->srcpad, buf);
1507 /* move this forward (the tmplayer parser needs this) */
1508 if (self->state.duration != GST_CLOCK_TIME_NONE)
1509 self->state.start_time += self->state.duration;
1514 if (ret != GST_FLOW_OK) {
1515 GST_DEBUG_OBJECT (self, "flow: %s", gst_flow_get_name (ret));
1524 static GstFlowReturn
1525 gst_sub_parse_chain (GstPad * sinkpad, GstBuffer * buf)
1530 self = GST_SUBPARSE (GST_PAD_PARENT (sinkpad));
1532 /* Push newsegment if needed */
1533 if (self->need_segment) {
1534 GST_LOG_OBJECT (self, "pushing newsegment event with %" GST_SEGMENT_FORMAT,
1537 gst_pad_push_event (self->srcpad, gst_event_new_new_segment (FALSE,
1538 self->segment.rate, self->segment.format,
1539 self->segment.last_stop, self->segment.stop, self->segment.time));
1540 self->need_segment = FALSE;
1543 ret = handle_buffer (self, buf);
1549 gst_sub_parse_sink_event (GstPad * pad, GstEvent * event)
1551 GstSubParse *self = GST_SUBPARSE (gst_pad_get_parent (pad));
1552 gboolean ret = FALSE;
1554 GST_DEBUG ("Handling %s event", GST_EVENT_TYPE_NAME (event));
1556 switch (GST_EVENT_TYPE (event)) {
1557 case GST_EVENT_EOS:{
1558 /* Make sure the last subrip chunk is pushed out even
1559 * if the file does not have an empty line at the end */
1560 if (self->parser_type == GST_SUB_PARSE_FORMAT_SUBRIP ||
1561 self->parser_type == GST_SUB_PARSE_FORMAT_TMPLAYER ||
1562 self->parser_type == GST_SUB_PARSE_FORMAT_MPL2) {
1563 GstBuffer *buf = gst_buffer_new_and_alloc (2 + 1);
1565 GST_DEBUG ("EOS. Pushing remaining text (if any)");
1566 GST_BUFFER_DATA (buf)[0] = '\n';
1567 GST_BUFFER_DATA (buf)[1] = '\n';
1568 GST_BUFFER_DATA (buf)[2] = '\0'; /* play it safe */
1569 GST_BUFFER_SIZE (buf) = 2;
1570 GST_BUFFER_OFFSET (buf) = self->offset;
1571 gst_sub_parse_chain (pad, buf);
1573 ret = gst_pad_event_default (pad, event);
1576 case GST_EVENT_NEWSEGMENT:
1580 gint64 start, stop, time;
1583 gst_event_parse_new_segment (event, &update, &rate, &format, &start,
1586 GST_DEBUG_OBJECT (self, "newsegment (%s)", gst_format_get_name (format));
1588 if (format == GST_FORMAT_TIME) {
1589 gst_segment_set_newsegment (&self->segment, update, rate, format,
1592 /* if not time format, we'll either start with a 0 timestamp anyway or
1593 * it's following a seek in which case we'll have saved the requested
1594 * seek segment and don't want to overwrite it (remember that on a seek
1595 * we always just seek back to the start in BYTES format and just throw
1596 * away all text that's before the requested position; if the subtitles
1597 * come from an upstream demuxer, it won't be able to handle our BYTES
1598 * seek request and instead send us a newsegment from the seek request
1599 * it received via its video pads instead, so all is fine then too) */
1603 gst_event_unref (event);
1606 case GST_EVENT_FLUSH_START:
1608 self->flushing = TRUE;
1610 ret = gst_pad_event_default (pad, event);
1613 case GST_EVENT_FLUSH_STOP:
1615 self->flushing = FALSE;
1617 ret = gst_pad_event_default (pad, event);
1621 ret = gst_pad_event_default (pad, event);
1625 gst_object_unref (self);
1631 static GstStateChangeReturn
1632 gst_sub_parse_change_state (GstElement * element, GstStateChange transition)
1634 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
1635 GstSubParse *self = GST_SUBPARSE (element);
1637 switch (transition) {
1638 case GST_STATE_CHANGE_READY_TO_PAUSED:
1639 /* format detection will init the parser state */
1641 self->next_offset = 0;
1642 self->parser_type = GST_SUB_PARSE_FORMAT_UNKNOWN;
1643 self->valid_utf8 = TRUE;
1644 self->first_buffer = TRUE;
1645 g_free (self->detected_encoding);
1646 self->detected_encoding = NULL;
1647 g_string_truncate (self->textbuf, 0);
1648 gst_adapter_clear (self->adapter);
1654 ret = parent_class->change_state (element, transition);
1655 if (ret == GST_STATE_CHANGE_FAILURE)
1658 switch (transition) {
1659 case GST_STATE_CHANGE_PAUSED_TO_READY:
1660 parser_state_dispose (&self->state);
1661 self->parser_type = GST_SUB_PARSE_FORMAT_UNKNOWN;
1674 /* FIXME 0.11: these caps are ugly, use app/x-subtitle + type field or so;
1675 * also, give different subtitle formats really different types */
1676 static GstStaticCaps mpl2_caps =
1677 GST_STATIC_CAPS ("application/x-subtitle-mpl2");
1678 #define SUB_CAPS (gst_static_caps_get (&sub_caps))
1680 static GstStaticCaps tmp_caps =
1681 GST_STATIC_CAPS ("application/x-subtitle-tmplayer");
1682 #define TMP_CAPS (gst_static_caps_get (&tmp_caps))
1684 static GstStaticCaps sub_caps = GST_STATIC_CAPS ("application/x-subtitle");
1685 #define MPL2_CAPS (gst_static_caps_get (&mpl2_caps))
1687 #ifndef GST_DISABLE_XML
1688 static GstStaticCaps smi_caps = GST_STATIC_CAPS ("application/x-subtitle-sami");
1689 #define SAMI_CAPS (gst_static_caps_get (&smi_caps))
1692 static GstStaticCaps dks_caps = GST_STATIC_CAPS ("application/x-subtitle-dks");
1693 #define DKS_CAPS (gst_static_caps_get (&dks_caps))
1696 gst_subparse_type_find (GstTypeFind * tf, gpointer private)
1698 GstSubParseFormat format;
1702 gchar *encoding = NULL;
1705 if (!(data = gst_type_find_peek (tf, 0, 129)))
1708 /* make sure string passed to _autodetect() is NUL-terminated */
1709 str = g_malloc0 (129);
1710 memcpy (str, data, 128);
1712 if ((encoding = detect_encoding (str, 128)) != NULL) {
1713 gchar *converted_str;
1717 converted_str = gst_convert_to_utf8 (str, 128, encoding, &tmp, &err);
1718 if (converted_str == NULL) {
1719 GST_DEBUG ("Encoding '%s' detected but conversion failed: %s", encoding,
1725 str = converted_str;
1730 /* Check if at least the first 120 chars are valid UTF8,
1731 * otherwise convert as always */
1732 if (!g_utf8_validate (str, 128, &end) && (end - str) < 120) {
1733 gchar *converted_str;
1738 enc = g_getenv ("GST_SUBTITLE_ENCODING");
1739 if (enc == NULL || *enc == '\0') {
1740 /* if local encoding is UTF-8 and no encoding specified
1741 * via the environment variable, assume ISO-8859-15 */
1742 if (g_get_charset (&enc)) {
1743 enc = "ISO-8859-15";
1746 converted_str = gst_convert_to_utf8 (str, 128, enc, &tmp, &err);
1747 if (converted_str == NULL) {
1748 GST_DEBUG ("Charset conversion failed: %s", err->message);
1754 str = converted_str;
1758 format = gst_sub_parse_data_format_autodetect (str);
1762 case GST_SUB_PARSE_FORMAT_MDVDSUB:
1763 GST_DEBUG ("MicroDVD format detected");
1766 case GST_SUB_PARSE_FORMAT_SUBRIP:
1767 GST_DEBUG ("SubRip format detected");
1770 case GST_SUB_PARSE_FORMAT_MPSUB:
1771 GST_DEBUG ("MPSub format detected");
1774 #ifndef GST_DISABLE_XML
1775 case GST_SUB_PARSE_FORMAT_SAMI:
1776 GST_DEBUG ("SAMI (time-based) format detected");
1780 case GST_SUB_PARSE_FORMAT_TMPLAYER:
1781 GST_DEBUG ("TMPlayer (time based) format detected");
1784 /* FIXME: our MPL2 typefinding is not really good enough to warrant
1785 * returning a high probability (however, since we registered our
1786 * typefinder here with a rank of MARGINAL we should pretty much only
1787 * be called if most other typefinders have already run */
1788 case GST_SUB_PARSE_FORMAT_MPL2:
1789 GST_DEBUG ("MPL2 (time based) format detected");
1792 case GST_SUB_PARSE_FORMAT_SUBVIEWER:
1793 GST_DEBUG ("SubViewer format detected");
1796 case GST_SUB_PARSE_FORMAT_DKS:
1797 GST_DEBUG ("DKS format detected");
1801 case GST_SUB_PARSE_FORMAT_UNKNOWN:
1802 GST_DEBUG ("no subtitle format detected");
1806 /* if we're here, it's ok */
1807 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, caps);
1811 plugin_init (GstPlugin * plugin)
1813 static gchar *sub_exts[] = { "srt", "sub", "mpsub", "mdvd", "smi", "txt",
1817 GST_DEBUG_CATEGORY_INIT (sub_parse_debug, "subparse", 0, ".sub parser");
1819 if (!gst_type_find_register (plugin, "subparse_typefind", GST_RANK_MARGINAL,
1820 gst_subparse_type_find, sub_exts, SUB_CAPS, NULL, NULL))
1823 if (!gst_element_register (plugin, "subparse",
1824 GST_RANK_PRIMARY, GST_TYPE_SUBPARSE) ||
1825 !gst_element_register (plugin, "ssaparse",
1826 GST_RANK_PRIMARY, GST_TYPE_SSA_PARSE)) {
1833 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
1837 plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)