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.
28 #include <sys/types.h>
31 #include "gstsubparse.h"
32 #include "gstssaparse.h"
33 #include "samiparse.h"
34 #include "tmplayerparse.h"
36 GST_DEBUG_CATEGORY (sub_parse_debug);
38 #define DEFAULT_ENCODING NULL
47 gst_sub_parse_set_property (GObject * object, guint prop_id,
48 const GValue * value, GParamSpec * pspec);
50 gst_sub_parse_get_property (GObject * object, guint prop_id,
51 GValue * value, GParamSpec * pspec);
54 static const GstElementDetails sub_parse_details =
55 GST_ELEMENT_DETAILS ("Subtitle parser",
56 "Codec/Parser/Subtitle",
57 "Parses subtitle (.sub) files into text streams",
58 "Gustavo J. A. M. Carneiro <gjc@inescporto.pt>\n"
59 "Ronald S. Bultje <rbultje@ronald.bitfreak.net>");
61 #ifndef GST_DISABLE_LOADSAVE_REGISTRY
62 static GstStaticPadTemplate sink_templ = GST_STATIC_PAD_TEMPLATE ("sink",
65 GST_STATIC_CAPS ("application/x-subtitle; application/x-subtitle-sami; "
66 "application/x-subtitle-tmplayer")
69 static GstStaticPadTemplate sink_templ = GST_STATIC_PAD_TEMPLATE ("sink",
72 GST_STATIC_CAPS ("application/x-subtitle")
76 static GstStaticPadTemplate src_templ = GST_STATIC_PAD_TEMPLATE ("src",
79 GST_STATIC_CAPS ("text/plain; text/x-pango-markup")
82 static void gst_sub_parse_base_init (GstSubParseClass * klass);
83 static void gst_sub_parse_class_init (GstSubParseClass * klass);
84 static void gst_sub_parse_init (GstSubParse * subparse);
86 static gboolean gst_sub_parse_src_event (GstPad * pad, GstEvent * event);
87 static gboolean gst_sub_parse_sink_event (GstPad * pad, GstEvent * event);
89 static GstStateChangeReturn gst_sub_parse_change_state (GstElement * element,
90 GstStateChange transition);
92 static GstFlowReturn gst_sub_parse_chain (GstPad * sinkpad, GstBuffer * buf);
94 static GstElementClass *parent_class = NULL;
97 gst_sub_parse_get_type (void)
99 static GType sub_parse_type = 0;
101 if (!sub_parse_type) {
102 static const GTypeInfo sub_parse_info = {
103 sizeof (GstSubParseClass),
104 (GBaseInitFunc) gst_sub_parse_base_init,
106 (GClassInitFunc) gst_sub_parse_class_init,
109 sizeof (GstSubParse),
111 (GInstanceInitFunc) gst_sub_parse_init,
114 sub_parse_type = g_type_register_static (GST_TYPE_ELEMENT,
115 "GstSubParse", &sub_parse_info, 0);
118 return sub_parse_type;
122 gst_sub_parse_base_init (GstSubParseClass * klass)
124 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
126 gst_element_class_add_pad_template (element_class,
127 gst_static_pad_template_get (&sink_templ));
128 gst_element_class_add_pad_template (element_class,
129 gst_static_pad_template_get (&src_templ));
130 gst_element_class_set_details (element_class, &sub_parse_details);
134 gst_sub_parse_dispose (GObject * object)
136 GstSubParse *subparse = GST_SUBPARSE (object);
138 GST_DEBUG_OBJECT (subparse, "cleaning up subtitle parser");
140 if (subparse->encoding) {
141 g_free (subparse->encoding);
142 subparse->encoding = NULL;
144 if (subparse->textbuf) {
145 g_string_free (subparse->textbuf, TRUE);
146 subparse->textbuf = NULL;
148 sami_context_deinit (&subparse->state);
150 GST_CALL_PARENT (G_OBJECT_CLASS, dispose, (object));
154 gst_sub_parse_class_init (GstSubParseClass * klass)
156 GObjectClass *object_class = G_OBJECT_CLASS (klass);
157 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
159 parent_class = g_type_class_peek_parent (klass);
161 object_class->dispose = gst_sub_parse_dispose;
162 object_class->set_property = gst_sub_parse_set_property;
163 object_class->get_property = gst_sub_parse_get_property;
165 element_class->change_state = gst_sub_parse_change_state;
167 g_object_class_install_property (object_class, PROP_ENCODING,
168 g_param_spec_string ("subtitle-encoding", "subtitle charset encoding",
169 "Encoding to assume if input subtitles are not in UTF-8 encoding. "
170 "If not set, the GST_SUBTITLE_ENCODING environment variable will "
171 "be checked for an encoding to use. If that is not set either, "
172 "ISO-8859-15 will be assumed.", DEFAULT_ENCODING, G_PARAM_READWRITE));
176 gst_sub_parse_init (GstSubParse * subparse)
178 subparse->sinkpad = gst_pad_new_from_static_template (&sink_templ, "sink");
179 gst_pad_set_chain_function (subparse->sinkpad,
180 GST_DEBUG_FUNCPTR (gst_sub_parse_chain));
181 gst_pad_set_event_function (subparse->sinkpad,
182 GST_DEBUG_FUNCPTR (gst_sub_parse_sink_event));
183 gst_element_add_pad (GST_ELEMENT (subparse), subparse->sinkpad);
185 subparse->srcpad = gst_pad_new_from_static_template (&src_templ, "src");
186 gst_pad_set_event_function (subparse->srcpad,
187 GST_DEBUG_FUNCPTR (gst_sub_parse_src_event));
188 gst_element_add_pad (GST_ELEMENT (subparse), subparse->srcpad);
190 subparse->textbuf = g_string_new (NULL);
191 subparse->parser_type = GST_SUB_PARSE_FORMAT_UNKNOWN;
192 subparse->flushing = FALSE;
193 gst_segment_init (&subparse->segment, GST_FORMAT_TIME);
194 subparse->need_segment = TRUE;
195 subparse->encoding = g_strdup (DEFAULT_ENCODING);
199 * Source pad functions.
203 gst_sub_parse_src_event (GstPad * pad, GstEvent * event)
205 GstSubParse *self = GST_SUBPARSE (gst_pad_get_parent (pad));
206 gboolean ret = FALSE;
208 GST_DEBUG ("Handling %s event", GST_EVENT_TYPE_NAME (event));
210 switch (GST_EVENT_TYPE (event)) {
214 GstSeekType start_type, stop_type;
219 gst_event_parse_seek (event, &rate, &format, &self->segment_flags,
220 &start_type, &start, &stop_type, &stop);
222 if (format != GST_FORMAT_TIME) {
223 GST_WARNING_OBJECT (self, "we only support seeking in TIME format");
224 gst_event_unref (event);
228 /* Convert that seek to a seeking in bytes at position 0,
229 FIXME: could use an index */
230 ret = gst_pad_push_event (self->sinkpad,
231 gst_event_new_seek (rate, GST_FORMAT_BYTES, self->segment_flags,
232 GST_SEEK_TYPE_SET, 0, GST_SEEK_TYPE_NONE, 0));
235 /* Apply the seek to our segment */
236 gst_segment_set_seek (&self->segment, rate, format, self->segment_flags,
237 start_type, start, stop_type, stop, &update);
239 GST_DEBUG_OBJECT (self, "segment after seek: %" GST_SEGMENT_FORMAT,
242 self->next_offset = 0;
244 self->need_segment = TRUE;
246 GST_WARNING_OBJECT (self, "seek to 0 bytes failed");
249 gst_event_unref (event);
253 ret = gst_pad_event_default (pad, event);
258 gst_object_unref (self);
264 gst_sub_parse_set_property (GObject * object, guint prop_id,
265 const GValue * value, GParamSpec * pspec)
267 GstSubParse *subparse = GST_SUBPARSE (object);
269 GST_OBJECT_LOCK (subparse);
272 g_free (subparse->encoding);
273 subparse->encoding = g_value_dup_string (value);
274 GST_LOG_OBJECT (object, "subtitle encoding set to %s",
275 GST_STR_NULL (subparse->encoding));
278 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
281 GST_OBJECT_UNLOCK (subparse);
285 gst_sub_parse_get_property (GObject * object, guint prop_id,
286 GValue * value, GParamSpec * pspec)
288 GstSubParse *subparse = GST_SUBPARSE (object);
290 GST_OBJECT_LOCK (subparse);
293 g_value_set_string (value, subparse->encoding);
296 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
299 GST_OBJECT_UNLOCK (subparse);
303 convert_encoding (GstSubParse * self, const gchar * str, gsize len)
305 const gchar *encoding;
309 if (self->valid_utf8) {
310 if (g_utf8_validate (str, len, NULL)) {
311 GST_LOG_OBJECT (self, "valid UTF-8, no conversion needed");
312 return g_strndup (str, len);
314 GST_INFO_OBJECT (self, "invalid UTF-8!");
315 self->valid_utf8 = FALSE;
318 encoding = self->encoding;
319 if (encoding == NULL || *encoding == '\0') {
320 encoding = g_getenv ("GST_SUBTITLE_ENCODING");
322 if (encoding == NULL || *encoding == '\0') {
323 /* if local encoding is UTF-8 and no encoding specified
324 * via the environment variable, assume ISO-8859-15 */
325 if (g_get_charset (&encoding)) {
326 encoding = "ISO-8859-15";
330 ret = g_convert_with_fallback (str, len, "UTF-8", encoding, "*", NULL,
334 GST_WARNING_OBJECT (self, "could not convert string from '%s' to UTF-8: %s",
335 encoding, err->message);
338 /* invalid input encoding, fall back to ISO-8859-15 (always succeeds) */
339 ret = g_convert_with_fallback (str, len, "UTF-8", "ISO-8859-15", "*",
343 GST_LOG_OBJECT (self,
344 "successfully converted %" G_GSIZE_FORMAT " characters from %s to UTF-8"
345 "%s", len, encoding, (err) ? " , using ISO-8859-15 as fallback" : "");
351 get_next_line (GstSubParse * self)
354 const char *line_end;
356 gboolean have_r = FALSE;
358 line_end = strchr (self->textbuf->str, '\n');
361 /* end-of-line not found; return for more data */
365 /* get rid of '\r' */
366 if (line_end != self->textbuf->str && *(line_end - 1) == '\r') {
371 line_len = line_end - self->textbuf->str;
372 line = convert_encoding (self, self->textbuf->str, line_len);
373 self->textbuf = g_string_erase (self->textbuf, 0,
374 line_len + (have_r ? 2 : 1));
379 parse_mdvdsub (ParserState * state, const gchar * line)
381 const gchar *line_split;
383 guint start_frame, end_frame;
384 gint64 clip_start = 0, clip_stop = 0;
385 gboolean in_seg = FALSE;
389 /* style variables */
394 if (sscanf (line, "{%u}{%u}", &start_frame, &end_frame) != 2) {
395 g_warning ("Parse of the following line, assumed to be in microdvd .sub"
396 " format, failed:\n%s", line);
400 /* skip the {%u}{%u} part */
401 line = strchr (line, '}') + 1;
402 line = strchr (line, '}') + 1;
404 /* see if there's a first line with a framerate */
405 if (state->fps == 0.0 && start_frame == 1 && end_frame == 1) {
406 gchar *rest, *end = NULL;
408 rest = g_strdup (line);
409 g_strdelimit (rest, ",", '.');
410 state->fps = g_ascii_strtod (rest, &end);
413 GST_INFO ("framerate from file: %f ('%s')", state->fps, rest);
418 if (state->fps == 0.0) {
419 /* FIXME: hardcoded for now, is there a better way/assumption? */
420 state->fps = 24000.0 / 1001.0;
421 GST_INFO ("no framerate specified, assuming %f", state->fps);
424 state->start_time = start_frame / state->fps * GST_SECOND;
425 state->duration = (end_frame - start_frame) / state->fps * GST_SECOND;
427 /* Check our segment start/stop */
428 in_seg = gst_segment_clip (state->segment, GST_FORMAT_TIME,
429 state->start_time, state->start_time + state->duration, &clip_start,
432 /* No need to parse that text if it's out of segment */
434 state->start_time = clip_start;
435 state->duration = clip_stop - clip_start;
440 markup = g_string_new (NULL);
445 /* parse style markup */
446 if (strncmp (line, "{y:i}", 5) == 0) {
448 line = strchr (line, '}') + 1;
450 if (strncmp (line, "{y:b}", 5) == 0) {
452 line = strchr (line, '}') + 1;
454 if (sscanf (line, "{s:%u}", &fontsize) == 1) {
455 line = strchr (line, '}') + 1;
457 if ((line_split = strchr (line, '|')))
458 line_chunk = g_markup_escape_text (line, line_split - line);
460 line_chunk = g_markup_escape_text (line, strlen (line));
461 markup = g_string_append (markup, "<span");
463 g_string_append (markup, " style=\"italic\"");
465 g_string_append (markup, " weight=\"bold\"");
467 g_string_append_printf (markup, " size=\"%u\"", fontsize * 1000);
468 g_string_append_printf (markup, ">%s</span>", line_chunk);
471 g_string_append (markup, "\n");
472 line = line_split + 1;
478 g_string_free (markup, FALSE);
479 GST_DEBUG ("parse_mdvdsub returning (%f+%f): %s",
480 state->start_time / (double) GST_SECOND,
481 state->duration / (double) GST_SECOND, ret);
486 strip_trailing_newlines (gchar * txt)
492 while (len > 1 && txt[len - 1] == '\n') {
499 /* we want to escape text in general, but retain basic markup like
500 * <i></i>, <u></u>, and <b></b>. The easiest and safest way is to
501 * just unescape a white list of allowed markups again after
502 * escaping everything (the text between these simple markers isn't
503 * necessarily escaped, so it seems best to do it like this) */
505 subrip_unescape_formatting (gchar * txt)
509 for (pos = txt; pos != NULL && *pos != '\0'; ++pos) {
510 if (g_ascii_strncasecmp (pos, "<u>", 9) == 0 ||
511 g_ascii_strncasecmp (pos, "<i>", 9) == 0 ||
512 g_ascii_strncasecmp (pos, "<b>", 9) == 0) {
514 pos[1] = g_ascii_tolower (pos[4]);
516 /* move NUL terminator as well */
517 g_memmove (pos + 3, pos + 9, strlen (pos + 9) + 1);
522 for (pos = txt; pos != NULL && *pos != '\0'; ++pos) {
523 if (g_ascii_strncasecmp (pos, "</u>", 10) == 0 ||
524 g_ascii_strncasecmp (pos, "</i>", 10) == 0 ||
525 g_ascii_strncasecmp (pos, "</b>", 10) == 0) {
528 pos[2] = g_ascii_tolower (pos[5]);
530 /* move NUL terminator as well */
531 g_memmove (pos + 4, pos + 10, strlen (pos + 10) + 1);
539 subrip_remove_unhandled_tag (gchar * start, gchar * stop)
543 tag = start + strlen ("<");
547 if (g_ascii_tolower (*tag) < 'a' || g_ascii_tolower (*tag) > 'z')
552 GST_LOG ("removing unhandled tag '%s'", start);
554 g_memmove (start, stop, strlen (stop) + 1);
558 /* remove tags we haven't explicitly allowed earlier on, like font tags
561 subrip_remove_unhandled_tags (gchar * txt)
565 for (pos = txt; pos != NULL && *pos != '\0'; ++pos) {
566 if (strncmp (pos, "<", 4) == 0 && (gt = strstr (pos + 4, ">"))) {
567 if (subrip_remove_unhandled_tag (pos, gt + strlen (">")))
573 /* we only allow <i>, <u> and <b>, so let's take a simple approach. This code
574 * assumes the input has been escaped and subrip_unescape_formatting() has then
575 * been run over the input! This function adds missing closing markup tags and
576 * removes broken closing tags for tags that have never been opened. */
578 subrip_fix_up_markup (gchar ** p_txt)
580 gchar *cur, *next_tag;
582 guint num_open_tags = 0;
584 g_assert (*p_txt != NULL);
587 while (*cur != '\0') {
588 next_tag = strchr (cur, '<');
589 if (next_tag == NULL)
595 if (num_open_tags == 0 || open_tags[num_open_tags - 1] != *next_tag) {
596 GST_LOG ("broken input, closing tag '%c' is not open", *next_tag);
597 g_memmove (next_tag - 2, next_tag + 2, strlen (next_tag + 2) + 1);
600 /* it's all good, closing tag which is open */
608 if (num_open_tags == G_N_ELEMENTS (open_tags))
609 return; /* something dodgy is going on, stop parsing */
610 open_tags[num_open_tags] = *next_tag;
614 GST_ERROR ("unexpected tag '%c' (%s)", *next_tag, next_tag);
615 g_assert_not_reached ();
621 if (num_open_tags > 0) {
624 s = g_string_new (*p_txt);
625 while (num_open_tags > 0) {
626 GST_LOG ("adding missing closing tag '%c'", open_tags[num_open_tags - 1]);
627 g_string_append_c (s, '<');
628 g_string_append_c (s, '/');
629 g_string_append_c (s, open_tags[num_open_tags - 1]);
630 g_string_append_c (s, '>');
634 *p_txt = g_string_free (s, FALSE);
639 parse_subrip (ParserState * state, const gchar * line)
641 guint h1, m1, s1, ms1;
642 guint h2, m2, s2, ms2;
646 switch (state->state) {
648 /* looking for a single integer */
649 if (sscanf (line, "%u", &subnum) == 1)
653 /* looking for start_time --> end_time */
654 if (sscanf (line, "%u:%u:%u,%u --> %u:%u:%u,%u",
655 &h1, &m1, &s1, &ms1, &h2, &m2, &s2, &ms2) == 8) {
658 (((guint64) h1) * 3600 + m1 * 60 + s1) * GST_SECOND +
661 (((guint64) h2) * 3600 + m2 * 60 + s2) * GST_SECOND +
662 ms2 * GST_MSECOND - state->start_time;
664 GST_DEBUG ("error parsing subrip time line");
669 { /* No need to parse that text if it's out of segment */
670 gint64 clip_start = 0, clip_stop = 0;
671 gboolean in_seg = FALSE;
673 /* Check our segment start/stop */
674 in_seg = gst_segment_clip (state->segment, GST_FORMAT_TIME,
675 state->start_time, state->start_time + state->duration,
676 &clip_start, &clip_stop);
679 state->start_time = clip_start;
680 state->duration = clip_stop - clip_start;
686 /* looking for subtitle text; empty line ends this
689 g_string_append_c (state->buf, '\n');
690 g_string_append (state->buf, line);
691 if (strlen (line) == 0) {
692 ret = g_markup_escape_text (state->buf->str, state->buf->len);
693 g_string_truncate (state->buf, 0);
695 subrip_unescape_formatting (ret);
696 subrip_remove_unhandled_tags (ret);
697 strip_trailing_newlines (ret);
698 subrip_fix_up_markup (&ret);
703 g_return_val_if_reached (NULL);
708 parse_mpsub (ParserState * state, const gchar * line)
713 switch (state->state) {
715 /* looking for two floats (offset, duration) */
716 if (sscanf (line, "%f %f", &t1, &t2) == 2) {
718 state->start_time += state->duration + GST_SECOND * t1;
719 state->duration = GST_SECOND * t2;
723 { /* No need to parse that text if it's out of segment */
724 gint64 clip_start = 0, clip_stop = 0;
725 gboolean in_seg = FALSE;
727 /* Check our segment start/stop */
728 in_seg = gst_segment_clip (state->segment, GST_FORMAT_TIME,
729 state->start_time, state->start_time + state->duration,
730 &clip_start, &clip_stop);
733 state->start_time = clip_start;
734 state->duration = clip_stop - clip_start;
740 /* looking for subtitle text; empty line ends this
743 g_string_append_c (state->buf, '\n');
744 g_string_append (state->buf, line);
745 if (strlen (line) == 0) {
746 ret = g_strdup (state->buf->str);
747 g_string_truncate (state->buf, 0);
753 g_assert_not_reached ();
759 parser_state_init (ParserState * state)
761 GST_DEBUG ("initialising parser");
764 g_string_truncate (state->buf, 0);
766 state->buf = g_string_new (NULL);
769 state->start_time = 0;
772 state->segment = NULL;
776 parser_state_dispose (ParserState * state)
779 g_string_free (state->buf, TRUE);
782 if (state->user_data) {
783 sami_context_reset (state);
788 * FIXME: maybe we should pass along a second argument, the preceding
789 * text buffer, because that is how this originally worked, even though
790 * I don't really see the use of that.
793 static GstSubParseFormat
794 gst_sub_parse_data_format_autodetect (gchar * match_str)
796 static gboolean need_init_regexps = TRUE;
797 static regex_t mdvd_rx;
798 static regex_t subrip_rx;
801 /* initialize the regexps used the first time around */
802 if (need_init_regexps) {
806 need_init_regexps = FALSE;
807 if ((err = regcomp (&mdvd_rx, "^\\{[0-9]+\\}\\{[0-9]+\\}",
808 REG_EXTENDED | REG_NEWLINE | REG_NOSUB) != 0) ||
809 (err = regcomp (&subrip_rx, "^[1-9]([0-9]){0,3}(\x0d)?\x0a"
810 "[0-9][0-9]:[0-9][0-9]:[0-9][0-9],[0-9]{3}"
811 " --> [0-9][0-9]:[0-9][0-9]:[0-9][0-9],[0-9]{3}",
812 REG_EXTENDED | REG_NEWLINE | REG_NOSUB)) != 0) {
813 regerror (err, &subrip_rx, errstr, 127);
814 GST_WARNING ("Compilation of subrip regex failed: %s", errstr);
818 if (regexec (&mdvd_rx, match_str, 0, NULL, 0) == 0) {
819 GST_LOG ("MicroDVD (frame based) format detected");
820 return GST_SUB_PARSE_FORMAT_MDVDSUB;
822 if (regexec (&subrip_rx, match_str, 0, NULL, 0) == 0) {
823 GST_LOG ("SubRip (time based) format detected");
824 return GST_SUB_PARSE_FORMAT_SUBRIP;
826 if (!strncmp (match_str, "FORMAT=TIME", 11)) {
827 GST_LOG ("MPSub (time based) format detected");
828 return GST_SUB_PARSE_FORMAT_MPSUB;
830 if (strstr (match_str, "<SAMI>") != NULL ||
831 strstr (match_str, "<sami>") != NULL) {
832 GST_LOG ("SAMI (time based) format detected");
833 return GST_SUB_PARSE_FORMAT_SAMI;
835 /* we're boldly assuming the first subtitle appears within the first hour */
836 if (sscanf (match_str, "0:%02u:%02u:", &n1, &n2) == 2 ||
837 sscanf (match_str, "0:%02u:%02u=", &n1, &n2) == 2 ||
838 sscanf (match_str, "00:%02u:%02u:", &n1, &n2) == 2 ||
839 sscanf (match_str, "00:%02u:%02u=", &n1, &n2) == 2 ||
840 sscanf (match_str, "00:%02u:%02u,%u=", &n1, &n2, &n3) == 3) {
841 GST_LOG ("TMPlayer (time based) format detected");
842 return GST_SUB_PARSE_FORMAT_TMPLAYER;
845 GST_DEBUG ("no subtitle format detected");
846 return GST_SUB_PARSE_FORMAT_UNKNOWN;
850 gst_sub_parse_format_autodetect (GstSubParse * self)
853 GstSubParseFormat format;
855 if (strlen (self->textbuf->str) < 35) {
856 GST_DEBUG ("File too small to be a subtitles file");
860 data = g_strndup (self->textbuf->str, 35);
861 format = gst_sub_parse_data_format_autodetect (data);
864 self->parser_type = format;
865 parser_state_init (&self->state);
868 case GST_SUB_PARSE_FORMAT_MDVDSUB:
869 self->parse_line = parse_mdvdsub;
870 return gst_caps_new_simple ("text/x-pango-markup", NULL);
871 case GST_SUB_PARSE_FORMAT_SUBRIP:
872 self->parse_line = parse_subrip;
873 return gst_caps_new_simple ("text/x-pango-markup", NULL);
874 case GST_SUB_PARSE_FORMAT_MPSUB:
875 self->parse_line = parse_mpsub;
876 return gst_caps_new_simple ("text/plain", NULL);
877 case GST_SUB_PARSE_FORMAT_SAMI:
878 self->parse_line = parse_sami;
879 sami_context_init (&self->state);
880 return gst_caps_new_simple ("text/x-pango-markup", NULL);
881 case GST_SUB_PARSE_FORMAT_TMPLAYER:
882 self->parse_line = parse_tmplayer;
883 return gst_caps_new_simple ("text/plain", NULL);
884 case GST_SUB_PARSE_FORMAT_UNKNOWN:
886 GST_DEBUG ("no subtitle format detected");
887 GST_ELEMENT_ERROR (self, STREAM, WRONG_TYPE,
888 ("The input is not a valid/supported subtitle file"), (NULL));
894 feed_textbuf (GstSubParse * self, GstBuffer * buf)
896 if (GST_BUFFER_OFFSET (buf) != self->offset) {
897 /* flush the parser state */
898 parser_state_init (&self->state);
899 g_string_truncate (self->textbuf, 0);
900 sami_context_reset (&self->state);
903 self->textbuf = g_string_append_len (self->textbuf,
904 (gchar *) GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
905 self->offset = GST_BUFFER_OFFSET (buf) + GST_BUFFER_SIZE (buf);
906 self->next_offset = self->offset;
908 gst_buffer_unref (buf);
912 handle_buffer (GstSubParse * self, GstBuffer * buf)
914 GstFlowReturn ret = GST_FLOW_OK;
915 GstCaps *caps = NULL;
916 gchar *line, *subtitle;
918 feed_textbuf (self, buf);
920 /* make sure we know the format */
921 if (G_UNLIKELY (self->parser_type == GST_SUB_PARSE_FORMAT_UNKNOWN)) {
922 if (!(caps = gst_sub_parse_format_autodetect (self))) {
923 return GST_FLOW_UNEXPECTED;
925 if (!gst_pad_set_caps (self->srcpad, caps)) {
926 gst_caps_unref (caps);
927 return GST_FLOW_UNEXPECTED;
929 gst_caps_unref (caps);
932 while ((line = get_next_line (self)) && !self->flushing) {
933 /* Set segment on our parser state machine */
934 self->state.segment = &self->segment;
935 /* Now parse the line, out of segment lines will just return NULL */
936 GST_LOG_OBJECT (self, "Parsing line '%s'", line);
937 subtitle = self->parse_line (&self->state, line);
941 guint subtitle_len = strlen (subtitle);
943 /* +1 for terminating NUL character */
944 ret = gst_pad_alloc_buffer_and_set_caps (self->srcpad,
945 GST_BUFFER_OFFSET_NONE, subtitle_len + 1,
946 GST_PAD_CAPS (self->srcpad), &buf);
948 if (ret == GST_FLOW_OK) {
949 /* copy terminating NUL character as well */
950 memcpy (GST_BUFFER_DATA (buf), subtitle, subtitle_len + 1);
951 GST_BUFFER_SIZE (buf) = subtitle_len;
952 GST_BUFFER_TIMESTAMP (buf) = self->state.start_time;
953 GST_BUFFER_DURATION (buf) = self->state.duration;
955 gst_segment_set_last_stop (&self->segment, GST_FORMAT_TIME,
956 self->state.start_time);
958 GST_DEBUG_OBJECT (self, "Sending text '%s', %" GST_TIME_FORMAT " + %"
959 GST_TIME_FORMAT, subtitle, GST_TIME_ARGS (self->state.start_time),
960 GST_TIME_ARGS (self->state.duration));
962 ret = gst_pad_push (self->srcpad, buf);
968 if (ret != GST_FLOW_OK) {
969 GST_DEBUG_OBJECT (self, "flow: %s", gst_flow_get_name (ret));
979 gst_sub_parse_chain (GstPad * sinkpad, GstBuffer * buf)
984 self = GST_SUBPARSE (GST_PAD_PARENT (sinkpad));
986 /* Push newsegment if needed */
987 if (self->need_segment) {
988 GST_LOG_OBJECT (self, "pushing newsegment event with %" GST_SEGMENT_FORMAT,
991 gst_pad_push_event (self->srcpad, gst_event_new_new_segment (FALSE,
992 self->segment.rate, self->segment.format,
993 self->segment.last_stop, self->segment.stop, self->segment.time));
994 self->need_segment = FALSE;
997 ret = handle_buffer (self, buf);
1003 gst_sub_parse_sink_event (GstPad * pad, GstEvent * event)
1005 GstSubParse *self = GST_SUBPARSE (gst_pad_get_parent (pad));
1006 gboolean ret = FALSE;
1008 GST_DEBUG ("Handling %s event", GST_EVENT_TYPE_NAME (event));
1010 switch (GST_EVENT_TYPE (event)) {
1011 case GST_EVENT_EOS:{
1012 /* Make sure the last subrip chunk is pushed out even
1013 * if the file does not have an empty line at the end */
1014 if (self->parser_type == GST_SUB_PARSE_FORMAT_SUBRIP) {
1015 GstBuffer *buf = gst_buffer_new_and_alloc (1 + 1);
1017 GST_DEBUG ("EOS. Pushing remaining text (if any)");
1018 GST_BUFFER_DATA (buf)[0] = '\n';
1019 GST_BUFFER_DATA (buf)[1] = '\0'; /* play it safe */
1020 GST_BUFFER_SIZE (buf) = 1;
1021 GST_BUFFER_OFFSET (buf) = self->offset;
1022 gst_sub_parse_chain (pad, buf);
1024 ret = gst_pad_event_default (pad, event);
1027 case GST_EVENT_NEWSEGMENT:
1031 gint64 start, stop, time;
1034 gst_event_parse_new_segment (event, &update, &rate, &format, &start,
1037 GST_DEBUG_OBJECT (self, "newsegment (%s)", gst_format_get_name (format));
1039 if (format == GST_FORMAT_TIME) {
1040 gst_segment_set_newsegment (&self->segment, update, rate, format,
1043 /* if not time format, we'll either start with a 0 timestamp anyway or
1044 * it's following a seek in which case we'll have saved the requested
1045 * seek segment and don't want to overwrite it (remember that on a seek
1046 * we always just seek back to the start in BYTES format and just throw
1047 * away all text that's before the requested position; if the subtitles
1048 * come from an upstream demuxer, it won't be able to handle our BYTES
1049 * seek request and instead send us a newsegment from the seek request
1050 * it received via its video pads instead, so all is fine then too) */
1054 gst_event_unref (event);
1057 case GST_EVENT_FLUSH_START:
1059 self->flushing = TRUE;
1061 ret = gst_pad_event_default (pad, event);
1064 case GST_EVENT_FLUSH_STOP:
1066 self->flushing = FALSE;
1068 ret = gst_pad_event_default (pad, event);
1072 ret = gst_pad_event_default (pad, event);
1076 gst_object_unref (self);
1082 static GstStateChangeReturn
1083 gst_sub_parse_change_state (GstElement * element, GstStateChange transition)
1085 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
1086 GstSubParse *self = GST_SUBPARSE (element);
1088 switch (transition) {
1089 case GST_STATE_CHANGE_READY_TO_PAUSED:
1090 /* format detection will init the parser state */
1092 self->next_offset = 0;
1093 self->parser_type = GST_SUB_PARSE_FORMAT_UNKNOWN;
1094 self->valid_utf8 = TRUE;
1095 g_string_truncate (self->textbuf, 0);
1101 ret = parent_class->change_state (element, transition);
1102 if (ret == GST_STATE_CHANGE_FAILURE)
1105 switch (transition) {
1106 case GST_STATE_CHANGE_PAUSED_TO_READY:
1107 parser_state_dispose (&self->state);
1108 self->parser_type = GST_SUB_PARSE_FORMAT_UNKNOWN;
1121 /* FIXME 0.11: these caps are ugly, use app/x-subtitle + type field or so;
1122 * also, give different subtitle formats really different types */
1123 static GstStaticCaps tmp_caps =
1124 GST_STATIC_CAPS ("application/x-subtitle-tmplayer");
1125 static GstStaticCaps smi_caps = GST_STATIC_CAPS ("application/x-subtitle-sami");
1126 static GstStaticCaps sub_caps = GST_STATIC_CAPS ("application/x-subtitle");
1128 #define SUB_CAPS (gst_static_caps_get (&sub_caps))
1129 #define SAMI_CAPS (gst_static_caps_get (&smi_caps))
1130 #define TMP_CAPS (gst_static_caps_get (&tmp_caps))
1133 gst_subparse_type_find (GstTypeFind * tf, gpointer private)
1135 GstSubParseFormat format;
1140 if (!(data = gst_type_find_peek (tf, 0, 36)))
1143 /* make sure string passed to _autodetect() is NUL-terminated */
1144 str = g_strndup ((gchar *) data, 35);
1145 format = gst_sub_parse_data_format_autodetect (str);
1149 case GST_SUB_PARSE_FORMAT_MDVDSUB:
1150 GST_DEBUG ("MicroDVD format detected");
1153 case GST_SUB_PARSE_FORMAT_SUBRIP:
1154 GST_DEBUG ("SubRip format detected");
1157 case GST_SUB_PARSE_FORMAT_MPSUB:
1158 GST_DEBUG ("MPSub format detected");
1161 case GST_SUB_PARSE_FORMAT_SAMI:
1162 GST_DEBUG ("SAMI (time-based) format detected");
1165 case GST_SUB_PARSE_FORMAT_TMPLAYER:
1166 GST_DEBUG ("TMPlayer (time based) format detected");
1170 case GST_SUB_PARSE_FORMAT_UNKNOWN:
1171 GST_DEBUG ("no subtitle format detected");
1175 /* if we're here, it's ok */
1176 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, caps);
1180 plugin_init (GstPlugin * plugin)
1182 static gchar *sub_exts[] = { "srt", "sub", "mpsub", "mdvd", "smi", "txt",
1186 GST_DEBUG_CATEGORY_INIT (sub_parse_debug, "subparse", 0, ".sub parser");
1188 if (!gst_type_find_register (plugin, "subparse_typefind", GST_RANK_MARGINAL,
1189 gst_subparse_type_find, sub_exts, SUB_CAPS, NULL, NULL))
1192 if (!gst_element_register (plugin, "subparse",
1193 GST_RANK_PRIMARY, GST_TYPE_SUBPARSE) ||
1194 !gst_element_register (plugin, "ssaparse",
1195 GST_RANK_PRIMARY, GST_TYPE_SSA_PARSE)) {
1202 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
1206 plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)