diff options
Diffstat (limited to 'gst/subparse/gstsubparse.c')
| -rw-r--r-- | gst/subparse/gstsubparse.c | 1888 |
1 files changed, 0 insertions, 1888 deletions
diff --git a/gst/subparse/gstsubparse.c b/gst/subparse/gstsubparse.c deleted file mode 100644 index b73b45c7..00000000 --- a/gst/subparse/gstsubparse.c +++ /dev/null @@ -1,1888 +0,0 @@ -/* GStreamer - * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> - * Copyright (C) 2004 Ronald S. Bultje <rbultje@ronald.bitfreak.net> - * Copyright (C) 2006 Tim-Philipp Müller <tim centricular net> - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - */ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <sys/types.h> -#include <glib.h> - -#include "gstsubparse.h" -#include "gstssaparse.h" -#include "samiparse.h" -#include "tmplayerparse.h" -#include "mpl2parse.h" -#include "qttextparse.h" - -GST_DEBUG_CATEGORY (sub_parse_debug); - -#define DEFAULT_ENCODING NULL - -enum -{ - PROP_0, - PROP_ENCODING, - PROP_VIDEOFPS -}; - -static void -gst_sub_parse_set_property (GObject * object, guint prop_id, - const GValue * value, GParamSpec * pspec); -static void -gst_sub_parse_get_property (GObject * object, guint prop_id, - GValue * value, GParamSpec * pspec); - - -static const GstElementDetails sub_parse_details = -GST_ELEMENT_DETAILS ("Subtitle parser", - "Codec/Parser/Subtitle", - "Parses subtitle (.sub) files into text streams", - "Gustavo J. A. M. Carneiro <gjc@inescporto.pt>\n" - "GStreamer maintainers <gstreamer-devel@lists.sourceforge.net>"); - -#ifndef GST_DISABLE_XML -static GstStaticPadTemplate sink_templ = GST_STATIC_PAD_TEMPLATE ("sink", - GST_PAD_SINK, - GST_PAD_ALWAYS, - GST_STATIC_CAPS ("application/x-subtitle; application/x-subtitle-sami; " - "application/x-subtitle-tmplayer; application/x-subtitle-mpl2; " - "application/x-subtitle-dks; application/x-subtitle-qttext") - ); -#else -static GstStaticPadTemplate sink_templ = GST_STATIC_PAD_TEMPLATE ("sink", - GST_PAD_SINK, - GST_PAD_ALWAYS, - GST_STATIC_CAPS ("application/x-subtitle; application/x-subtitle-dks; " - "application/x-subtitle-tmplayer; application/x-subtitle-mpl2; " - "application/x-subtitle-qttext") - ); -#endif - -static GstStaticPadTemplate src_templ = GST_STATIC_PAD_TEMPLATE ("src", - GST_PAD_SRC, - GST_PAD_ALWAYS, - GST_STATIC_CAPS ("text/plain; text/x-pango-markup") - ); - -static void gst_sub_parse_base_init (GstSubParseClass * klass); -static void gst_sub_parse_class_init (GstSubParseClass * klass); -static void gst_sub_parse_init (GstSubParse * subparse); - -static gboolean gst_sub_parse_src_event (GstPad * pad, GstEvent * event); -static gboolean gst_sub_parse_src_query (GstPad * pad, GstQuery * query); -static gboolean gst_sub_parse_sink_event (GstPad * pad, GstEvent * event); - -static GstStateChangeReturn gst_sub_parse_change_state (GstElement * element, - GstStateChange transition); - -static GstFlowReturn gst_sub_parse_chain (GstPad * sinkpad, GstBuffer * buf); - -static GstElementClass *parent_class = NULL; - -GType -gst_sub_parse_get_type (void) -{ - static GType sub_parse_type = 0; - - if (!sub_parse_type) { - static const GTypeInfo sub_parse_info = { - sizeof (GstSubParseClass), - (GBaseInitFunc) gst_sub_parse_base_init, - NULL, - (GClassInitFunc) gst_sub_parse_class_init, - NULL, - NULL, - sizeof (GstSubParse), - 0, - (GInstanceInitFunc) gst_sub_parse_init, - }; - - sub_parse_type = g_type_register_static (GST_TYPE_ELEMENT, - "GstSubParse", &sub_parse_info, 0); - } - - return sub_parse_type; -} - -static void -gst_sub_parse_base_init (GstSubParseClass * klass) -{ - GstElementClass *element_class = GST_ELEMENT_CLASS (klass); - - gst_element_class_add_pad_template (element_class, - gst_static_pad_template_get (&sink_templ)); - gst_element_class_add_pad_template (element_class, - gst_static_pad_template_get (&src_templ)); - gst_element_class_set_details (element_class, &sub_parse_details); -} - -static void -gst_sub_parse_dispose (GObject * object) -{ - GstSubParse *subparse = GST_SUBPARSE (object); - - GST_DEBUG_OBJECT (subparse, "cleaning up subtitle parser"); - - switch (subparse->parser_type) { - case GST_SUB_PARSE_FORMAT_QTTEXT: - qttext_context_deinit (&subparse->state); - break; -#ifndef GST_DISABLE_XML - case GST_SUB_PARSE_FORMAT_SAMI: - sami_context_deinit (&subparse->state); - break; -#endif - default: - break; - } - - if (subparse->encoding) { - g_free (subparse->encoding); - subparse->encoding = NULL; - } - - if (subparse->detected_encoding) { - g_free (subparse->detected_encoding); - subparse->detected_encoding = NULL; - } - - if (subparse->adapter) { - g_object_unref (subparse->adapter); - subparse->adapter = NULL; - } - - if (subparse->textbuf) { - g_string_free (subparse->textbuf, TRUE); - subparse->textbuf = NULL; - } - - GST_CALL_PARENT (G_OBJECT_CLASS, dispose, (object)); -} - -static void -gst_sub_parse_class_init (GstSubParseClass * klass) -{ - GObjectClass *object_class = G_OBJECT_CLASS (klass); - GstElementClass *element_class = GST_ELEMENT_CLASS (klass); - - parent_class = g_type_class_peek_parent (klass); - - object_class->dispose = gst_sub_parse_dispose; - object_class->set_property = gst_sub_parse_set_property; - object_class->get_property = gst_sub_parse_get_property; - - element_class->change_state = gst_sub_parse_change_state; - - g_object_class_install_property (object_class, PROP_ENCODING, - g_param_spec_string ("subtitle-encoding", "subtitle charset encoding", - "Encoding to assume if input subtitles are not in UTF-8 or any other " - "Unicode encoding. If not set, the GST_SUBTITLE_ENCODING environment " - "variable will be checked for an encoding to use. If that is not set " - "either, ISO-8859-15 will be assumed.", DEFAULT_ENCODING, - G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); - - g_object_class_install_property (object_class, PROP_VIDEOFPS, - gst_param_spec_fraction ("video-fps", "Video framerate", - "Framerate of the video stream. This is needed by some subtitle " - "formats to synchronize subtitles and video properly. If not set " - "and the subtitle format requires it subtitles may be out of sync.", - 0, 1, G_MAXINT, 1, 24000, 1001, G_PARAM_READWRITE)); -} - -static void -gst_sub_parse_init (GstSubParse * subparse) -{ - subparse->sinkpad = gst_pad_new_from_static_template (&sink_templ, "sink"); - gst_pad_set_chain_function (subparse->sinkpad, - GST_DEBUG_FUNCPTR (gst_sub_parse_chain)); - gst_pad_set_event_function (subparse->sinkpad, - GST_DEBUG_FUNCPTR (gst_sub_parse_sink_event)); - gst_element_add_pad (GST_ELEMENT (subparse), subparse->sinkpad); - - subparse->srcpad = gst_pad_new_from_static_template (&src_templ, "src"); - gst_pad_set_event_function (subparse->srcpad, - GST_DEBUG_FUNCPTR (gst_sub_parse_src_event)); - gst_pad_set_query_function (subparse->srcpad, - GST_DEBUG_FUNCPTR (gst_sub_parse_src_query)); - gst_element_add_pad (GST_ELEMENT (subparse), subparse->srcpad); - - subparse->textbuf = g_string_new (NULL); - subparse->parser_type = GST_SUB_PARSE_FORMAT_UNKNOWN; - subparse->flushing = FALSE; - gst_segment_init (&subparse->segment, GST_FORMAT_TIME); - subparse->need_segment = TRUE; - subparse->encoding = g_strdup (DEFAULT_ENCODING); - subparse->detected_encoding = NULL; - subparse->adapter = gst_adapter_new (); - - subparse->fps_n = 24000; - subparse->fps_d = 1001; -} - -/* - * Source pad functions. - */ - -static gboolean -gst_sub_parse_src_query (GstPad * pad, GstQuery * query) -{ - GstSubParse *self = GST_SUBPARSE (gst_pad_get_parent (pad)); - gboolean ret = FALSE; - - GST_DEBUG ("Handling %s query", GST_QUERY_TYPE_NAME (query)); - - switch (GST_QUERY_TYPE (query)) { - case GST_QUERY_POSITION:{ - GstFormat fmt; - - gst_query_parse_position (query, &fmt, NULL); - if (fmt != GST_FORMAT_TIME) { - ret = gst_pad_peer_query (self->sinkpad, query); - } else { - ret = TRUE; - gst_query_set_position (query, GST_FORMAT_TIME, - self->segment.last_stop); - } - } - case GST_QUERY_SEEKING: - { - GstFormat fmt; - gboolean seekable = FALSE; - - ret = TRUE; - - gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL); - if (fmt == GST_FORMAT_TIME) { - GstQuery *peerquery = gst_query_new_seeking (GST_FORMAT_BYTES); - - seekable = gst_pad_peer_query (self->sinkpad, peerquery); - if (seekable) - gst_query_parse_seeking (peerquery, NULL, &seekable, NULL, NULL); - gst_query_unref (peerquery); - } - - gst_query_set_seeking (query, fmt, seekable, seekable ? 0 : -1, -1); - - break; - } - default: - ret = gst_pad_peer_query (self->sinkpad, query); - break; - } - - gst_object_unref (self); - - return ret; -} - -static gboolean -gst_sub_parse_src_event (GstPad * pad, GstEvent * event) -{ - GstSubParse *self = GST_SUBPARSE (gst_pad_get_parent (pad)); - gboolean ret = FALSE; - - GST_DEBUG ("Handling %s event", GST_EVENT_TYPE_NAME (event)); - - switch (GST_EVENT_TYPE (event)) { - case GST_EVENT_SEEK: - { - GstFormat format; - GstSeekType start_type, stop_type; - gint64 start, stop; - gdouble rate; - gboolean update; - - gst_event_parse_seek (event, &rate, &format, &self->segment_flags, - &start_type, &start, &stop_type, &stop); - - if (format != GST_FORMAT_TIME) { - GST_WARNING_OBJECT (self, "we only support seeking in TIME format"); - gst_event_unref (event); - goto beach; - } - - /* Convert that seek to a seeking in bytes at position 0, - FIXME: could use an index */ - ret = gst_pad_push_event (self->sinkpad, - gst_event_new_seek (rate, GST_FORMAT_BYTES, self->segment_flags, - GST_SEEK_TYPE_SET, 0, GST_SEEK_TYPE_NONE, 0)); - - if (ret) { - /* Apply the seek to our segment */ - gst_segment_set_seek (&self->segment, rate, format, self->segment_flags, - start_type, start, stop_type, stop, &update); - - GST_DEBUG_OBJECT (self, "segment after seek: %" GST_SEGMENT_FORMAT, - &self->segment); - - self->next_offset = 0; - - self->need_segment = TRUE; - } else { - GST_WARNING_OBJECT (self, "seek to 0 bytes failed"); - } - - gst_event_unref (event); - break; - } - default: - ret = gst_pad_event_default (pad, event); - break; - } - -beach: - gst_object_unref (self); - - return ret; -} - -static void -gst_sub_parse_set_property (GObject * object, guint prop_id, - const GValue * value, GParamSpec * pspec) -{ - GstSubParse *subparse = GST_SUBPARSE (object); - - GST_OBJECT_LOCK (subparse); - switch (prop_id) { - case PROP_ENCODING: - g_free (subparse->encoding); - subparse->encoding = g_value_dup_string (value); - GST_LOG_OBJECT (object, "subtitle encoding set to %s", - GST_STR_NULL (subparse->encoding)); - break; - case PROP_VIDEOFPS: - { - subparse->fps_n = gst_value_get_fraction_numerator (value); - subparse->fps_d = gst_value_get_fraction_denominator (value); - GST_DEBUG_OBJECT (object, "video framerate set to %d/%d", subparse->fps_n, - subparse->fps_d); - - if (!subparse->state.have_internal_fps) { - subparse->state.fps_n = subparse->fps_n; - subparse->state.fps_d = subparse->fps_d; - } - break; - } - default: - G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); - break; - } - GST_OBJECT_UNLOCK (subparse); -} - -static void -gst_sub_parse_get_property (GObject * object, guint prop_id, - GValue * value, GParamSpec * pspec) -{ - GstSubParse *subparse = GST_SUBPARSE (object); - - GST_OBJECT_LOCK (subparse); - switch (prop_id) { - case PROP_ENCODING: - g_value_set_string (value, subparse->encoding); - break; - case PROP_VIDEOFPS: - gst_value_set_fraction (value, subparse->fps_n, subparse->fps_d); - break; - default: - G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); - break; - } - GST_OBJECT_UNLOCK (subparse); -} - -static gchar * -gst_sub_parse_get_format_description (GstSubParseFormat format) -{ - switch (format) { - case GST_SUB_PARSE_FORMAT_MDVDSUB: - return "MicroDVD"; - case GST_SUB_PARSE_FORMAT_SUBRIP: - return "SubRip"; - case GST_SUB_PARSE_FORMAT_MPSUB: - return "MPSub"; - case GST_SUB_PARSE_FORMAT_SAMI: - return "SAMI"; - case GST_SUB_PARSE_FORMAT_TMPLAYER: - return "TMPlayer"; - case GST_SUB_PARSE_FORMAT_MPL2: - return "MPL2"; - case GST_SUB_PARSE_FORMAT_SUBVIEWER: - return "SubViewer"; - case GST_SUB_PARSE_FORMAT_DKS: - return "DKS"; - case GST_SUB_PARSE_FORMAT_QTTEXT: - return "QTtext"; - default: - case GST_SUB_PARSE_FORMAT_UNKNOWN: - break; - } - return NULL; -} - -static gchar * -gst_convert_to_utf8 (const gchar * str, gsize len, const gchar * encoding, - gsize * consumed, GError ** err) -{ - gchar *ret = NULL; - - *consumed = 0; - ret = - g_convert_with_fallback (str, len, "UTF-8", encoding, "*", consumed, NULL, - err); - if (ret == NULL) - return ret; - - /* + 3 to skip UTF-8 BOM if it was added */ - len = strlen (ret); - if (len >= 3 && (guint8) ret[0] == 0xEF && (guint8) ret[1] == 0xBB - && (guint8) ret[2] == 0xBF) - g_memmove (ret, ret + 3, len + 1 - 3); - - return ret; -} - -static gchar * -detect_encoding (const gchar * str, gsize len) -{ - if (len >= 3 && (guint8) str[0] == 0xEF && (guint8) str[1] == 0xBB - && (guint8) str[2] == 0xBF) - return g_strdup ("UTF-8"); - - if (len >= 2 && (guint8) str[0] == 0xFE && (guint8) str[1] == 0xFF) - return g_strdup ("UTF-16BE"); - - if (len >= 2 && (guint8) str[0] == 0xFF && (guint8) str[1] == 0xFE) - return g_strdup ("UTF-16LE"); - - if (len >= 4 && (guint8) str[0] == 0x00 && (guint8) str[1] == 0x00 - && (guint8) str[2] == 0xFE && (guint8) str[3] == 0xFF) - return g_strdup ("UTF-32BE"); - - if (len >= 4 && (guint8) str[0] == 0xFF && (guint8) str[1] == 0xFE - && (guint8) str[2] == 0x00 && (guint8) str[3] == 0x00) - return g_strdup ("UTF-32LE"); - - return NULL; -} - -static gchar * -convert_encoding (GstSubParse * self, const gchar * str, gsize len, - gsize * consumed) -{ - const gchar *encoding; - GError *err = NULL; - gchar *ret = NULL; - - *consumed = 0; - - /* First try any detected encoding */ - if (self->detected_encoding) { - ret = - gst_convert_to_utf8 (str, len, self->detected_encoding, consumed, &err); - - if (!err) - return ret; - - GST_WARNING_OBJECT (self, "could not convert string from '%s' to UTF-8: %s", - self->detected_encoding, err->message); - g_free (self->detected_encoding); - self->detected_encoding = NULL; - g_error_free (err); - } - - /* Otherwise check if it's UTF8 */ - if (self->valid_utf8) { - if (g_utf8_validate (str, len, NULL)) { - GST_LOG_OBJECT (self, "valid UTF-8, no conversion needed"); - *consumed = len; - return g_strndup (str, len); - } - GST_INFO_OBJECT (self, "invalid UTF-8!"); - self->valid_utf8 = FALSE; - } - - /* Else try fallback */ - encoding = self->encoding; - if (encoding == NULL || *encoding == '\0') { - encoding = g_getenv ("GST_SUBTITLE_ENCODING"); - } - if (encoding == NULL || *encoding == '\0') { - /* if local encoding is UTF-8 and no encoding specified - * via the environment variable, assume ISO-8859-15 */ - if (g_get_charset (&encoding)) { - encoding = "ISO-8859-15"; - } - } - - ret = gst_convert_to_utf8 (str, len, encoding, consumed, &err); - - if (err) { - GST_WARNING_OBJECT (self, "could not convert string from '%s' to UTF-8: %s", - encoding, err->message); - g_error_free (err); - - /* invalid input encoding, fall back to ISO-8859-15 (always succeeds) */ - ret = gst_convert_to_utf8 (str, len, "ISO-8859-15", consumed, NULL); - } - - GST_LOG_OBJECT (self, - "successfully converted %" G_GSIZE_FORMAT " characters from %s to UTF-8" - "%s", len, encoding, (err) ? " , using ISO-8859-15 as fallback" : ""); - - return ret; -} - -static gchar * -get_next_line (GstSubParse * self) -{ - char *line = NULL; - const char *line_end; - int line_len; - gboolean have_r = FALSE; - - line_end = strchr (self->textbuf->str, '\n'); - - if (!line_end) { - /* end-of-line not found; return for more data */ - return NULL; - } - - /* get rid of '\r' */ - if (line_end != self->textbuf->str && *(line_end - 1) == '\r') { - line_end--; - have_r = TRUE; - } - - line_len = line_end - self->textbuf->str; - line = g_strndup (self->textbuf->str, line_len); - self->textbuf = g_string_erase (self->textbuf, 0, - line_len + (have_r ? 2 : 1)); - return line; -} - -static gchar * -parse_mdvdsub (ParserState * state, const gchar * line) -{ - const gchar *line_split; - gchar *line_chunk; - guint start_frame, end_frame; - gint64 clip_start = 0, clip_stop = 0; - gboolean in_seg = FALSE; - GString *markup; - gchar *ret; - - /* style variables */ - gboolean italic; - gboolean bold; - guint fontsize; - gdouble fps = 0.0; - - if (sscanf (line, "{%u}{%u}", &start_frame, &end_frame) != 2) { - g_warning ("Parse of the following line, assumed to be in microdvd .sub" - " format, failed:\n%s", line); - return NULL; - } - - /* skip the {%u}{%u} part */ - line = strchr (line, '}') + 1; - line = strchr (line, '}') + 1; - - /* see if there's a first line with a framerate */ - if (start_frame == 1 && end_frame == 1) { - gchar *rest, *end = NULL; - - rest = g_strdup (line); - g_strdelimit (rest, ",", '.'); - fps = g_ascii_strtod (rest, &end); - if (end != rest) { - gst_util_double_to_fraction (fps, &state->fps_n, &state->fps_d); - GST_INFO ("framerate from file: %d/%d ('%s')", state->fps_n, - state->fps_d, rest); - } - g_free (rest); - return NULL; - } - - state->start_time = - gst_util_uint64_scale (start_frame, GST_SECOND * state->fps_d, - state->fps_n); - state->duration = - gst_util_uint64_scale (end_frame - start_frame, GST_SECOND * state->fps_d, - state->fps_n); - - /* Check our segment start/stop */ - in_seg = gst_segment_clip (state->segment, GST_FORMAT_TIME, - state->start_time, state->start_time + state->duration, &clip_start, - &clip_stop); - - /* No need to parse that text if it's out of segment */ - if (in_seg) { - state->start_time = clip_start; - state->duration = clip_stop - clip_start; - } else { - return NULL; - } - - markup = g_string_new (NULL); - while (1) { - italic = FALSE; - bold = FALSE; - fontsize = 0; - /* parse style markup */ - if (strncmp (line, "{y:i}", 5) == 0) { - italic = TRUE; - line = strchr (line, '}') + 1; - } - if (strncmp (line, "{y:b}", 5) == 0) { - bold = TRUE; - line = strchr (line, '}') + 1; - } - if (sscanf (line, "{s:%u}", &fontsize) == 1) { - line = strchr (line, '}') + 1; - } - /* forward slashes at beginning/end signify italics too */ - if (g_str_has_prefix (line, "/")) { - italic = TRUE; - ++line; - } - if ((line_split = strchr (line, '|'))) - line_chunk = g_markup_escape_text (line, line_split - line); - else - line_chunk = g_markup_escape_text (line, strlen (line)); - - /* Remove italics markers at end of line/stanza (CHECKME: are end slashes - * always at the end of a line or can they span multiple lines?) */ - if (g_str_has_suffix (line_chunk, "/")) { - line_chunk[strlen (line_chunk) - 1] = '\0'; - } - - markup = g_string_append (markup, "<span"); - if (italic) - g_string_append (markup, " style=\"italic\""); - if (bold) - g_string_append (markup, " weight=\"bold\""); - if (fontsize) - g_string_append_printf (markup, " size=\"%u\"", fontsize * 1000); - g_string_append_printf (markup, ">%s</span>", line_chunk); - g_free (line_chunk); - if (line_split) { - g_string_append (markup, "\n"); - line = line_split + 1; - } else { - break; - } - } - ret = markup->str; - g_string_free (markup, FALSE); - GST_DEBUG ("parse_mdvdsub returning (%f+%f): %s", - state->start_time / (double) GST_SECOND, - state->duration / (double) GST_SECOND, ret); - return ret; -} - -static void -strip_trailing_newlines (gchar * txt) -{ - if (txt) { - guint len; - - len = strlen (txt); - while (len > 1 && txt[len - 1] == '\n') { - txt[len - 1] = '\0'; - --len; - } - } -} - -/* we want to escape text in general, but retain basic markup like - * <i></i>, <u></u>, and <b></b>. The easiest and safest way is to - * just unescape a white list of allowed markups again after - * escaping everything (the text between these simple markers isn't - * necessarily escaped, so it seems best to do it like this) */ -static void -subrip_unescape_formatting (gchar * txt) -{ - gchar *pos; - - for (pos = txt; pos != NULL && *pos != '\0'; ++pos) { - if (g_ascii_strncasecmp (pos, "<u>", 9) == 0 || - g_ascii_strncasecmp (pos, "<i>", 9) == 0 || - g_ascii_strncasecmp (pos, "<b>", 9) == 0) { - pos[0] = '<'; - pos[1] = g_ascii_tolower (pos[4]); - pos[2] = '>'; - /* move NUL terminator as well */ - g_memmove (pos + 3, pos + 9, strlen (pos + 9) + 1); - pos += 2; - } - } - - for (pos = txt; pos != NULL && *pos != '\0'; ++pos) { - if (g_ascii_strncasecmp (pos, "</u>", 10) == 0 || - g_ascii_strncasecmp (pos, "</i>", 10) == 0 || - g_ascii_strncasecmp (pos, "</b>", 10) == 0) { - pos[0] = '<'; - pos[1] = '/'; - pos[2] = g_ascii_tolower (pos[5]); - pos[3] = '>'; - /* move NUL terminator as well */ - g_memmove (pos + 4, pos + 10, strlen (pos + 10) + 1); - pos += 3; - } - } -} - - -static gboolean -subrip_remove_unhandled_tag (gchar * start, gchar * stop) -{ - gchar *tag, saved; - - tag = start + strlen ("<"); - if (*tag == '/') - ++tag; - - if (g_ascii_tolower (*tag) < 'a' || g_ascii_tolower (*tag) > 'z') - return FALSE; - - saved = *stop; - *stop = '\0'; - GST_LOG ("removing unhandled tag '%s'", start); - *stop = saved; - g_memmove (start, stop, strlen (stop) + 1); - return TRUE; -} - -/* remove tags we haven't explicitly allowed earlier on, like font tags - * for example */ -static void -subrip_remove_unhandled_tags (gchar * txt) -{ - gchar *pos, *gt; - - for (pos = txt; pos != NULL && *pos != '\0'; ++pos) { - if (strncmp (pos, "<", 4) == 0 && (gt = strstr (pos + 4, ">"))) { - if (subrip_remove_unhandled_tag (pos, gt + strlen (">"))) - --pos; - } - } -} - -/* we only allow <i>, <u> and <b>, so let's take a simple approach. This code - * assumes the input has been escaped and subrip_unescape_formatting() has then - * been run over the input! This function adds missing closing markup tags and - * removes broken closing tags for tags that have never been opened. */ -static void -subrip_fix_up_markup (gchar ** p_txt) -{ - gchar *cur, *next_tag; - gchar open_tags[32]; - guint num_open_tags = 0; - - g_assert (*p_txt != NULL); - - cur = *p_txt; - while (*cur != '\0') { - next_tag = strchr (cur, '<'); - if (next_tag == NULL) - break; - ++next_tag; - switch (*next_tag) { - case '/':{ - ++next_tag; - if (num_open_tags == 0 || open_tags[num_open_tags - 1] != *next_tag) { - GST_LOG ("broken input, closing tag '%c' is not open", *next_tag); - g_memmove (next_tag - 2, next_tag + 2, strlen (next_tag + 2) + 1); - next_tag -= 2; - } else { - /* it's all good, closing tag which is open */ - --num_open_tags; - } - break; - } - case 'i': - case 'b': - case 'u': - if (num_open_tags == G_N_ELEMENTS (open_tags)) - return; /* something dodgy is going on, stop parsing */ - open_tags[num_open_tags] = *next_tag; - ++num_open_tags; - break; - default: - GST_ERROR ("unexpected tag '%c' (%s)", *next_tag, next_tag); - g_assert_not_reached (); - break; - } - cur = next_tag; - } - - if (num_open_tags > 0) { - GString *s; - - s = g_string_new (*p_txt); - while (num_open_tags > 0) { - GST_LOG ("adding missing closing tag '%c'", open_tags[num_open_tags - 1]); - g_string_append_c (s, '<'); - g_string_append_c (s, '/'); - g_string_append_c (s, open_tags[num_open_tags - 1]); - g_string_append_c (s, '>'); - --num_open_tags; - } - g_free (*p_txt); - *p_txt = g_string_free (s, FALSE); - } -} - -static gboolean -parse_subrip_time (const gchar * ts_string, GstClockTime * t) -{ - gchar s[128] = { '\0', }; - gchar *end, *p; - guint hour, min, sec, msec, len; - - while (*ts_string == ' ') - ++ts_string; - - g_strlcpy (s, ts_string, sizeof (s)); - if ((end = strstr (s, "-->"))) - *end = '\0'; - g_strchomp (s); - - /* ms may be in these formats: - * hh:mm:ss,500 = 500ms - * hh:mm:ss, 5 = 5ms - * hh:mm:ss, 5 = 50ms - * hh:mm:ss, 50 = 50ms - * hh:mm:ss,5 = 500ms - * and the same with . instead of ,. - * sscanf() doesn't differentiate between ' 5' and '5' so munge - * the white spaces within the timestamp to '0' (I'm sure there's a - * way to make sscanf() do this for us, but how?) - */ - g_strdelimit (s, " ", '0'); - g_strdelimit (s, ".", ','); - - /* make sure we have exactly three digits after he comma */ - p = strchr (s, ','); - g_assert (p != NULL); - ++p; - len = strlen (p); - if (len > 3) { - p[3] = '\0'; - } else - while (len < 3) { - g_strlcat (&p[len], "0", 2); - ++len; - } - - GST_LOG ("parsing timestamp '%s'", s); - if (sscanf (s, "%u:%u:%u,%u", &hour, &min, &sec, &msec) != 4) { - GST_WARNING ("failed to parse subrip timestamp string '%s'", s); - return FALSE; - } - - *t = ((hour * 3600) + (min * 60) + sec) * GST_SECOND + msec * GST_MSECOND; - return TRUE; -} - -static gchar * -parse_subrip (ParserState * state, const gchar * line) -{ - int subnum; - gchar *ret; - - switch (state->state) { - case 0: - /* looking for a single integer */ - if (sscanf (line, "%u", &subnum) == 1) - state->state = 1; - return NULL; - case 1: - { - GstClockTime ts_start, ts_end; - gchar *end_time; - - /* looking for start_time --> end_time */ - if ((end_time = strstr (line, " --> ")) && - parse_subrip_time (line, &ts_start) && - parse_subrip_time (end_time + strlen (" --> "), &ts_end) && - state->start_time <= ts_end) { - state->state = 2; - state->start_time = ts_start; - state->duration = ts_end - ts_start; - } else { - GST_DEBUG ("error parsing subrip time line '%s'", line); - state->state = 0; - } - return NULL; - } - case 2: - { - /* No need to parse that text if it's out of segment */ - gint64 clip_start = 0, clip_stop = 0; - gboolean in_seg = FALSE; - - /* Check our segment start/stop */ - in_seg = gst_segment_clip (state->segment, GST_FORMAT_TIME, - state->start_time, state->start_time + state->duration, - &clip_start, &clip_stop); - - if (in_seg) { - state->start_time = clip_start; - state->duration = clip_stop - clip_start; - } else { - state->state = 0; - return NULL; - } - } - /* looking for subtitle text; empty line ends this subtitle entry */ - if (state->buf->len) - g_string_append_c (state->buf, '\n'); - g_string_append (state->buf, line); - if (strlen (line) == 0) { - ret = g_markup_escape_text (state->buf->str, state->buf->len); - g_string_truncate (state->buf, 0); - state->state = 0; - subrip_unescape_formatting (ret); - subrip_remove_unhandled_tags (ret); - strip_trailing_newlines (ret); - subrip_fix_up_markup (&ret); - return ret; - } - return NULL; - default: - g_return_val_if_reached (NULL); - } -} - -static void -unescape_newlines_br (gchar * read) -{ - gchar *write = read; - - /* Replace all occurences of '[br]' with a newline as version 2 - * of the subviewer format uses this for newlines */ - - if (read[0] == '\0' || read[1] == '\0' || read[2] == '\0' || read[3] == '\0') - return; - - do { - if (strncmp (read, "[br]", 4) == 0) { - *write = '\n'; - read += 4; - } else { - *write = *read; - read++; - } - write++; - } while (*read); - - *write = '\0'; -} - -static gchar * -parse_subviewer (ParserState * state, const gchar * line) -{ - guint h1, m1, s1, ms1; - guint h2, m2, s2, ms2; - gchar *ret; - - /* TODO: Maybe also parse the fields in the header, especially DELAY. - * For examples see the unit test or - * http://www.doom9.org/index.html?/sub.htm */ - - switch (state->state) { - case 0: - /* looking for start_time,end_time */ - if (sscanf (line, "%u:%u:%u.%u,%u:%u:%u.%u", - &h1, &m1, &s1, &ms1, &h2, &m2, &s2, &ms2) == 8) { - state->state = 1; - state->start_time = - (((guint64) h1) * 3600 + m1 * 60 + s1) * GST_SECOND + - ms1 * GST_MSECOND; - state->duration = - (((guint64) h2) * 3600 + m2 * 60 + s2) * GST_SECOND + - ms2 * GST_MSECOND - state->start_time; - } - return NULL; - case 1: - { - /* No need to parse that text if it's out of segment */ - gint64 clip_start = 0, clip_stop = 0; - gboolean in_seg = FALSE; - - /* Check our segment start/stop */ - in_seg = gst_segment_clip (state->segment, GST_FORMAT_TIME, - state->start_time, state->start_time + state->duration, - &clip_start, &clip_stop); - - if (in_seg) { - state->start_time = clip_start; - state->duration = clip_stop - clip_start; - } else { - state->state = 0; - return NULL; - } - } - /* looking for subtitle text; empty line ends this subtitle entry */ - if (state->buf->len) - g_string_append_c (state->buf, '\n'); - g_string_append (state->buf, line); - if (strlen (line) == 0) { - ret = g_strdup (state->buf->str); - unescape_newlines_br (ret); - strip_trailing_newlines (ret); - g_string_truncate (state->buf, 0); - state->state = 0; - return ret; - } - return NULL; - default: - g_assert_not_reached (); - return NULL; - } -} - -static gchar * -parse_mpsub (ParserState * state, const gchar * line) -{ - gchar *ret; - float t1, t2; - - switch (state->state) { - case 0: - /* looking for two floats (offset, duration) */ - if (sscanf (line, "%f %f", &t1, &t2) == 2) { - state->state = 1; - state->start_time += state->duration + GST_SECOND * t1; - state->duration = GST_SECOND * t2; - } - return NULL; - case 1: - { /* No need to parse that text if it's out of segment */ - gint64 clip_start = 0, clip_stop = 0; - gboolean in_seg = FALSE; - - /* Check our segment start/stop */ - in_seg = gst_segment_clip (state->segment, GST_FORMAT_TIME, - state->start_time, state->start_time + state->duration, - &clip_start, &clip_stop); - - if (in_seg) { - state->start_time = clip_start; - state->duration = clip_stop - clip_start; - } else { - state->state = 0; - return NULL; - } - } - /* looking for subtitle text; empty line ends this - * subtitle entry */ - if (state->buf->len) - g_string_append_c (state->buf, '\n'); - g_string_append (state->buf, line); - if (strlen (line) == 0) { - ret = g_strdup (state->buf->str); - g_string_truncate (state->buf, 0); - state->state = 0; - return ret; - } - return NULL; - default: - g_assert_not_reached (); - return NULL; - } -} - -static const gchar * -dks_skip_timestamp (const gchar * line) -{ - while (*line && *line != ']') - line++; - if (*line == ']') - line++; - return line; -} - -static gchar * -parse_dks (ParserState * state, const gchar * line) -{ - guint h, m, s; - - switch (state->state) { - case 0: - /* Looking for the start time and text */ - if (sscanf (line, "[%u:%u:%u]", &h, &m, &s) == 3) { - const gchar *text; - state->start_time = (((guint64) h) * 3600 + m * 60 + s) * GST_SECOND; - text = dks_skip_timestamp (line); - if (*text) { - state->state = 1; - g_string_append (state->buf, text); - } - } - return NULL; - case 1: - { - gint64 clip_start = 0, clip_stop = 0; - gboolean in_seg; - gchar *ret; - - /* Looking for the end time */ - if (sscanf (line, "[%u:%u:%u]", &h, &m, &s) == 3) { - state->state = 0; - state->duration = (((guint64) h) * 3600 + m * 60 + s) * GST_SECOND - - state->start_time; - } else { - GST_WARNING ("Failed to parse subtitle end time"); - return NULL; - } - - /* Check if this subtitle is out of the current segment */ - in_seg = gst_segment_clip (state->segment, GST_FORMAT_TIME, - state->start_time, state->start_time + state->duration, - &clip_start, &clip_stop); - - if (!in_seg) { - return NULL; - } - - state->start_time = clip_start; - state->duration = clip_stop - clip_start; - - ret = g_strdup (state->buf->str); - g_string_truncate (state->buf, 0); - unescape_newlines_br (ret); - return ret; - } - default: - g_assert_not_reached (); - return NULL; - } -} - -static void -parser_state_init (ParserState * state) -{ - GST_DEBUG ("initialising parser"); - - if (state->buf) { - g_string_truncate (state->buf, 0); - } else { - state->buf = g_string_new (NULL); - } - - state->start_time = 0; - state->duration = 0; - state->max_duration = 0; /* no limit */ - state->state = 0; - state->segment = NULL; -} - -static void -parser_state_dispose (GstSubParse * self, ParserState * state) -{ - if (state->buf) { - g_string_free (state->buf, TRUE); - state->buf = NULL; - } - if (state->user_data) { - switch (self->parser_type) { -#ifndef GST_DISABLE_XML - case GST_SUB_PARSE_FORMAT_SAMI: - sami_context_reset (state); - break; -#endif - default: - break; - } - } -} - -/* regex type enum */ -typedef enum -{ - GST_SUB_PARSE_REGEX_UNKNOWN = 0, - GST_SUB_PARSE_REGEX_MDVDSUB = 1, - GST_SUB_PARSE_REGEX_SUBRIP = 2, - GST_SUB_PARSE_REGEX_DKS = 3, -} GstSubParseRegex; - -static gpointer -gst_sub_parse_data_format_autodetect_regex_once (GstSubParseRegex regtype) -{ - gpointer result = NULL; - GError *gerr = NULL; - switch (regtype) { - case GST_SUB_PARSE_REGEX_MDVDSUB: - result = - (gpointer) g_regex_new ("^\\{[0-9]+\\}\\{[0-9]+\\}", 0, 0, &gerr); - if (result == NULL) { - g_warning ("Compilation of mdvd regex failed: %s", gerr->message); - g_error_free (gerr); - } - break; - case GST_SUB_PARSE_REGEX_SUBRIP: - result = (gpointer) g_regex_new ("^([ 0-9]){0,3}[0-9]\\s*(\x0d)?\x0a" - "[ 0-9][0-9]:[ 0-9][0-9]:[ 0-9][0-9][,.][ 0-9]{0,2}[0-9]" - " +--> +([ 0-9])?[0-9]:[ 0-9][0-9]:[ 0-9][0-9][,.][ 0-9]{0,2}[0-9]", - 0, 0, &gerr); - if (result == NULL) { - g_warning ("Compilation of subrip regex failed: %s", gerr->message); - g_error_free (gerr); - } - break; - case GST_SUB_PARSE_REGEX_DKS: - result = (gpointer) g_regex_new ("^\[[0-9]+:[0-9]+:[0-9]+].*", - 0, 0, &gerr); - if (result == NULL) { - g_warning ("Compilation of dks regex failed: %s", gerr->message); - g_error_free (gerr); - } - break; - default: - GST_WARNING ("Trying to allocate regex of unknown type %u", regtype); - } - return result; -} - -/* - * FIXME: maybe we should pass along a second argument, the preceding - * text buffer, because that is how this originally worked, even though - * I don't really see the use of that. - */ - -static GstSubParseFormat -gst_sub_parse_data_format_autodetect (gchar * match_str) -{ - guint n1, n2, n3; - - static GOnce mdvd_rx_once = G_ONCE_INIT; - static GOnce subrip_rx_once = G_ONCE_INIT; - static GOnce dks_rx_once = G_ONCE_INIT; - - GRegex *mdvd_grx; - GRegex *subrip_grx; - GRegex *dks_grx; - - g_once (&mdvd_rx_once, - (GThreadFunc) gst_sub_parse_data_format_autodetect_regex_once, - (gpointer) GST_SUB_PARSE_REGEX_MDVDSUB); - g_once (&subrip_rx_once, - (GThreadFunc) gst_sub_parse_data_format_autodetect_regex_once, - (gpointer) GST_SUB_PARSE_REGEX_SUBRIP); - g_once (&dks_rx_once, - (GThreadFunc) gst_sub_parse_data_format_autodetect_regex_once, - (gpointer) GST_SUB_PARSE_REGEX_DKS); - - mdvd_grx = (GRegex *) mdvd_rx_once.retval; - subrip_grx = (GRegex *) subrip_rx_once.retval; - dks_grx = (GRegex *) dks_rx_once.retval; - - if (g_regex_match (mdvd_grx, match_str, 0, NULL) == TRUE) { - GST_LOG ("MicroDVD (frame based) format detected"); - return GST_SUB_PARSE_FORMAT_MDVDSUB; - } - if (g_regex_match (subrip_grx, match_str, 0, NULL) == TRUE) { - GST_LOG ("SubRip (time based) format detected"); - return GST_SUB_PARSE_FORMAT_SUBRIP; - } - if (g_regex_match (dks_grx, match_str, 0, NULL) == TRUE) { - GST_LOG ("DKS (time based) format detected"); - return GST_SUB_PARSE_FORMAT_DKS; - } - - if (!strncmp (match_str, "FORMAT=TIME", 11)) { - GST_LOG ("MPSub (time based) format detected"); - return GST_SUB_PARSE_FORMAT_MPSUB; - } -#ifndef GST_DISABLE_XML - if (strstr (match_str, "<SAMI>") != NULL || - strstr (match_str, "<sami>") != NULL) { - GST_LOG ("SAMI (time based) format detected"); - return GST_SUB_PARSE_FORMAT_SAMI; - } -#endif - /* we're boldly assuming the first subtitle appears within the first hour */ - if (sscanf (match_str, "0:%02u:%02u:", &n1, &n2) == 2 || - sscanf (match_str, "0:%02u:%02u=", &n1, &n2) == 2 || - sscanf (match_str, "00:%02u:%02u:", &n1, &n2) == 2 || - sscanf (match_str, "00:%02u:%02u=", &n1, &n2) == 2 || - sscanf (match_str, "00:%02u:%02u,%u=", &n1, &n2, &n3) == 3) { - GST_LOG ("TMPlayer (time based) format detected"); - return GST_SUB_PARSE_FORMAT_TMPLAYER; - } - if (sscanf (match_str, "[%u][%u]", &n1, &n2) == 2) { - GST_LOG ("MPL2 (time based) format detected"); - return GST_SUB_PARSE_FORMAT_MPL2; - } - if (strstr (match_str, "[INFORMATION]") != NULL) { - GST_LOG ("SubViewer (time based) format detected"); - return GST_SUB_PARSE_FORMAT_SUBVIEWER; - } - if (strstr (match_str, "{QTtext}") != NULL) { - GST_LOG ("QTtext (time based) format detected"); - return GST_SUB_PARSE_FORMAT_QTTEXT; - } - - GST_DEBUG ("no subtitle format detected"); - return GST_SUB_PARSE_FORMAT_UNKNOWN; -} - -static GstCaps * -gst_sub_parse_format_autodetect (GstSubParse * self) -{ - gchar *data; - GstSubParseFormat format; - - if (strlen (self->textbuf->str) < 30) { - GST_DEBUG ("File too small to be a subtitles file"); - return NULL; - } - - data = g_strndup (self->textbuf->str, 35); - format = gst_sub_parse_data_format_autodetect (data); - g_free (data); - - self->parser_type = format; - self->subtitle_codec = gst_sub_parse_get_format_description (format); - parser_state_init (&self->state); - - switch (format) { - case GST_SUB_PARSE_FORMAT_MDVDSUB: - self->parse_line = parse_mdvdsub; - return gst_caps_new_simple ("text/x-pango-markup", NULL); - case GST_SUB_PARSE_FORMAT_SUBRIP: - self->parse_line = parse_subrip; - return gst_caps_new_simple ("text/x-pango-markup", NULL); - case GST_SUB_PARSE_FORMAT_MPSUB: - self->parse_line = parse_mpsub; - return gst_caps_new_simple ("text/plain", NULL); -#ifndef GST_DISABLE_XML - case GST_SUB_PARSE_FORMAT_SAMI: - self->parse_line = parse_sami; - sami_context_init (&self->state); - return gst_caps_new_simple ("text/x-pango-markup", NULL); -#endif - case GST_SUB_PARSE_FORMAT_TMPLAYER: - self->parse_line = parse_tmplayer; - self->state.max_duration = 5 * GST_SECOND; - return gst_caps_new_simple ("text/plain", NULL); - case GST_SUB_PARSE_FORMAT_MPL2: - self->parse_line = parse_mpl2; - return gst_caps_new_simple ("text/x-pango-markup", NULL); - case GST_SUB_PARSE_FORMAT_DKS: - self->parse_line = parse_dks; - return gst_caps_new_simple ("text/plain", NULL); - case GST_SUB_PARSE_FORMAT_SUBVIEWER: - self->parse_line = parse_subviewer; - return gst_caps_new_simple ("text/plain", NULL); - case GST_SUB_PARSE_FORMAT_QTTEXT: - self->parse_line = parse_qttext; - qttext_context_init (&self->state); - return gst_caps_new_simple ("text/x-pango-markup", NULL); - case GST_SUB_PARSE_FORMAT_UNKNOWN: - default: - GST_DEBUG ("no subtitle format detected"); - GST_ELEMENT_ERROR (self, STREAM, WRONG_TYPE, - ("The input is not a valid/supported subtitle file"), (NULL)); - return NULL; - } -} - -static void -feed_textbuf (GstSubParse * self, GstBuffer * buf) -{ - gboolean discont; - gsize consumed; - gchar *input = NULL; - - discont = GST_BUFFER_IS_DISCONT (buf); - - if (GST_BUFFER_OFFSET_IS_VALID (buf) && - GST_BUFFER_OFFSET (buf) != self->offset) { - self->offset = GST_BUFFER_OFFSET (buf); - discont = TRUE; - } - - if (discont) { - GST_INFO ("discontinuity"); - /* flush the parser state */ - parser_state_init (&self->state); - g_string_truncate (self->textbuf, 0); - gst_adapter_clear (self->adapter); -#ifndef GST_DISABLE_XML - if (self->parser_type == GST_SUB_PARSE_FORMAT_SAMI) - sami_context_reset (&self->state); -#endif - /* we could set a flag to make sure that the next buffer we push out also - * has the DISCONT flag set, but there's no point really given that it's - * subtitles which are discontinuous by nature. */ - } - - self->offset = GST_BUFFER_OFFSET (buf) + GST_BUFFER_SIZE (buf); - self->next_offset = self->offset; - - gst_adapter_push (self->adapter, buf); - - input = - convert_encoding (self, (const gchar *) gst_adapter_peek (self->adapter, - gst_adapter_available (self->adapter)), - (gsize) gst_adapter_available (self->adapter), &consumed); - - if (input && consumed > 0) { - self->textbuf = g_string_append (self->textbuf, input); - gst_adapter_flush (self->adapter, consumed); - } - - g_free (input); -} - -static GstFlowReturn -handle_buffer (GstSubParse * self, GstBuffer * buf) -{ - GstFlowReturn ret = GST_FLOW_OK; - GstCaps *caps = NULL; - gchar *line, *subtitle; - - if (self->first_buffer) { - self->detected_encoding = - detect_encoding ((gchar *) GST_BUFFER_DATA (buf), - GST_BUFFER_SIZE (buf)); - self->first_buffer = FALSE; - self->state.fps_n = self->fps_n; - self->state.fps_d = self->fps_d; - } - - feed_textbuf (self, buf); - - /* make sure we know the format */ - if (G_UNLIKELY (self->parser_type == GST_SUB_PARSE_FORMAT_UNKNOWN)) { - if (!(caps = gst_sub_parse_format_autodetect (self))) { - return GST_FLOW_UNEXPECTED; - } - if (!gst_pad_set_caps (self->srcpad, caps)) { - gst_caps_unref (caps); - return GST_FLOW_UNEXPECTED; - } - gst_caps_unref (caps); - - /* push tags */ - if (self->subtitle_codec != NULL) { - GstTagList *tags; - - tags = gst_tag_list_new (); - gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_SUBTITLE_CODEC, - self->subtitle_codec, NULL); - gst_element_found_tags_for_pad (GST_ELEMENT (self), self->srcpad, tags); - } - } - - while (!self->flushing && (line = get_next_line (self))) { - guint offset = 0; - - /* Set segment on our parser state machine */ - self->state.segment = &self->segment; - /* Now parse the line, out of segment lines will just return NULL */ - GST_LOG_OBJECT (self, "Parsing line '%s'", line + offset); - subtitle = self->parse_line (&self->state, line + offset); - g_free (line); - - if (subtitle) { - guint subtitle_len = strlen (subtitle); - - /* +1 for terminating NUL character */ - ret = gst_pad_alloc_buffer_and_set_caps (self->srcpad, - GST_BUFFER_OFFSET_NONE, subtitle_len + 1, - GST_PAD_CAPS (self->srcpad), &buf); - - if (ret == GST_FLOW_OK) { - /* copy terminating NUL character as well */ - memcpy (GST_BUFFER_DATA (buf), subtitle, subtitle_len + 1); - GST_BUFFER_SIZE (buf) = subtitle_len; - GST_BUFFER_TIMESTAMP (buf) = self->state.start_time; - GST_BUFFER_DURATION (buf) = self->state.duration; - - /* in some cases (e.g. tmplayer) we can only determine the duration - * of a text chunk from the timestamp of the next text chunk; in those - * cases, we probably want to limit the duration to something - * reasonable, so we don't end up showing some text for e.g. 40 seconds - * just because nothing else is being said during that time */ - if (self->state.max_duration > 0 && GST_BUFFER_DURATION_IS_VALID (buf)) { - if (GST_BUFFER_DURATION (buf) > self->state.max_duration) - GST_BUFFER_DURATION (buf) = self->state.max_duration; - } - - gst_segment_set_last_stop (&self->segment, GST_FORMAT_TIME, - self->state.start_time); - - GST_DEBUG_OBJECT (self, "Sending text '%s', %" GST_TIME_FORMAT " + %" - GST_TIME_FORMAT, subtitle, GST_TIME_ARGS (self->state.start_time), - GST_TIME_ARGS (self->state.duration)); - - ret = gst_pad_push (self->srcpad, buf); - } - - /* move this forward (the tmplayer parser needs this) */ - if (self->state.duration != GST_CLOCK_TIME_NONE) - self->state.start_time += self->state.duration; - - g_free (subtitle); - subtitle = NULL; - - if (ret != GST_FLOW_OK) { - GST_DEBUG_OBJECT (self, "flow: %s", gst_flow_get_name (ret)); - break; - } - } - } - - return ret; -} - -static GstFlowReturn -gst_sub_parse_chain (GstPad * sinkpad, GstBuffer * buf) -{ - GstFlowReturn ret; - GstSubParse *self; - - self = GST_SUBPARSE (GST_PAD_PARENT (sinkpad)); - - /* Push newsegment if needed */ - if (self->need_segment) { - GST_LOG_OBJECT (self, "pushing newsegment event with %" GST_SEGMENT_FORMAT, - &self->segment); - - gst_pad_push_event (self->srcpad, gst_event_new_new_segment (FALSE, - self->segment.rate, self->segment.format, - self->segment.last_stop, self->segment.stop, self->segment.time)); - self->need_segment = FALSE; - } - - ret = handle_buffer (self, buf); - - return ret; -} - -static gboolean -gst_sub_parse_sink_event (GstPad * pad, GstEvent * event) -{ - GstSubParse *self = GST_SUBPARSE (gst_pad_get_parent (pad)); - gboolean ret = FALSE; - - GST_DEBUG ("Handling %s event", GST_EVENT_TYPE_NAME (event)); - - switch (GST_EVENT_TYPE (event)) { - case GST_EVENT_EOS:{ - /* Make sure the last subrip chunk is pushed out even - * if the file does not have an empty line at the end */ - if (self->parser_type == GST_SUB_PARSE_FORMAT_SUBRIP || - self->parser_type == GST_SUB_PARSE_FORMAT_TMPLAYER || - self->parser_type == GST_SUB_PARSE_FORMAT_MPL2 || - self->parser_type == GST_SUB_PARSE_FORMAT_QTTEXT) { - GstBuffer *buf = gst_buffer_new_and_alloc (2 + 1); - - GST_DEBUG ("EOS. Pushing remaining text (if any)"); - GST_BUFFER_DATA (buf)[0] = '\n'; - GST_BUFFER_DATA (buf)[1] = '\n'; - GST_BUFFER_DATA (buf)[2] = '\0'; /* play it safe */ - GST_BUFFER_SIZE (buf) = 2; - GST_BUFFER_OFFSET (buf) = self->offset; - gst_sub_parse_chain (pad, buf); - } - ret = gst_pad_event_default (pad, event); - break; - } - case GST_EVENT_NEWSEGMENT: - { - GstFormat format; - gdouble rate; - gint64 start, stop, time; - gboolean update; - - gst_event_parse_new_segment (event, &update, &rate, &format, &start, - &stop, &time); - - GST_DEBUG_OBJECT (self, "newsegment (%s)", gst_format_get_name (format)); - - if (format == GST_FORMAT_TIME) { - gst_segment_set_newsegment (&self->segment, update, rate, format, - start, stop, time); - } else { - /* if not time format, we'll either start with a 0 timestamp anyway or - * it's following a seek in which case we'll have saved the requested - * seek segment and don't want to overwrite it (remember that on a seek - * we always just seek back to the start in BYTES format and just throw - * away all text that's before the requested position; if the subtitles - * come from an upstream demuxer, it won't be able to handle our BYTES - * seek request and instead send us a newsegment from the seek request - * it received via its video pads instead, so all is fine then too) */ - } - - ret = TRUE; - gst_event_unref (event); - break; - } - case GST_EVENT_FLUSH_START: - { - self->flushing = TRUE; - - ret = gst_pad_event_default (pad, event); - break; - } - case GST_EVENT_FLUSH_STOP: - { - self->flushing = FALSE; - - ret = gst_pad_event_default (pad, event); - break; - } - default: - ret = gst_pad_event_default (pad, event); - break; - } - - gst_object_unref (self); - - return ret; -} - - -static GstStateChangeReturn -gst_sub_parse_change_state (GstElement * element, GstStateChange transition) -{ - GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS; - GstSubParse *self = GST_SUBPARSE (element); - - switch (transition) { - case GST_STATE_CHANGE_READY_TO_PAUSED: - /* format detection will init the parser state */ - self->offset = 0; - self->next_offset = 0; - self->parser_type = GST_SUB_PARSE_FORMAT_UNKNOWN; - self->valid_utf8 = TRUE; - self->first_buffer = TRUE; - g_free (self->detected_encoding); - self->detected_encoding = NULL; - g_string_truncate (self->textbuf, 0); - gst_adapter_clear (self->adapter); - break; - default: - break; - } - - ret = parent_class->change_state (element, transition); - if (ret == GST_STATE_CHANGE_FAILURE) - return ret; - - switch (transition) { - case GST_STATE_CHANGE_PAUSED_TO_READY: - parser_state_dispose (self, &self->state); - self->parser_type = GST_SUB_PARSE_FORMAT_UNKNOWN; - break; - default: - break; - } - - return ret; -} - -/* - * Typefind support. - */ - -/* FIXME 0.11: these caps are ugly, use app/x-subtitle + type field or so; - * also, give different subtitle formats really different types */ -static GstStaticCaps mpl2_caps = -GST_STATIC_CAPS ("application/x-subtitle-mpl2"); -#define SUB_CAPS (gst_static_caps_get (&sub_caps)) - -static GstStaticCaps tmp_caps = -GST_STATIC_CAPS ("application/x-subtitle-tmplayer"); -#define TMP_CAPS (gst_static_caps_get (&tmp_caps)) - -static GstStaticCaps sub_caps = GST_STATIC_CAPS ("application/x-subtitle"); -#define MPL2_CAPS (gst_static_caps_get (&mpl2_caps)) - -#ifndef GST_DISABLE_XML -static GstStaticCaps smi_caps = GST_STATIC_CAPS ("application/x-subtitle-sami"); -#define SAMI_CAPS (gst_static_caps_get (&smi_caps)) -#endif - -static GstStaticCaps dks_caps = GST_STATIC_CAPS ("application/x-subtitle-dks"); -#define DKS_CAPS (gst_static_caps_get (&dks_caps)) - -static GstStaticCaps qttext_caps = -GST_STATIC_CAPS ("application/x-subtitle-qttext"); -#define QTTEXT_CAPS (gst_static_caps_get (&qttext_caps)) - -static void -gst_subparse_type_find (GstTypeFind * tf, gpointer private) -{ - GstSubParseFormat format; - const guint8 *data; - GstCaps *caps; - gchar *str; - gchar *encoding = NULL; - const gchar *end; - - if (!(data = gst_type_find_peek (tf, 0, 129))) - return; - - /* make sure string passed to _autodetect() is NUL-terminated */ - str = g_malloc0 (129); - memcpy (str, data, 128); - - if ((encoding = detect_encoding (str, 128)) != NULL) { - gchar *converted_str; - GError *err = NULL; - gsize tmp; - - converted_str = gst_convert_to_utf8 (str, 128, encoding, &tmp, &err); - if (converted_str == NULL) { - GST_DEBUG ("Encoding '%s' detected but conversion failed: %s", encoding, - err->message); - g_error_free (err); - g_free (encoding); - } else { - g_free (str); - str = converted_str; - g_free (encoding); - } - } - - /* Check if at least the first 120 chars are valid UTF8, - * otherwise convert as always */ - if (!g_utf8_validate (str, 128, &end) && (end - str) < 120) { - gchar *converted_str; - GError *err = NULL; - gsize tmp; - const gchar *enc; - - enc = g_getenv ("GST_SUBTITLE_ENCODING"); - if (enc == NULL || *enc == '\0') { - /* if local encoding is UTF-8 and no encoding specified - * via the environment variable, assume ISO-8859-15 */ - if (g_get_charset (&enc)) { - enc = "ISO-8859-15"; - } - } - converted_str = gst_convert_to_utf8 (str, 128, enc, &tmp, &err); - if (converted_str == NULL) { - GST_DEBUG ("Charset conversion failed: %s", err->message); - g_error_free (err); - g_free (str); - return; - } else { - g_free (str); - str = converted_str; - } - } - - format = gst_sub_parse_data_format_autodetect (str); - g_free (str); - - switch (format) { - case GST_SUB_PARSE_FORMAT_MDVDSUB: - GST_DEBUG ("MicroDVD format detected"); - caps = SUB_CAPS; - break; - case GST_SUB_PARSE_FORMAT_SUBRIP: - GST_DEBUG ("SubRip format detected"); - caps = SUB_CAPS; - break; - case GST_SUB_PARSE_FORMAT_MPSUB: - GST_DEBUG ("MPSub format detected"); - caps = SUB_CAPS; - break; -#ifndef GST_DISABLE_XML - case GST_SUB_PARSE_FORMAT_SAMI: - GST_DEBUG ("SAMI (time-based) format detected"); - caps = SAMI_CAPS; - break; -#endif - case GST_SUB_PARSE_FORMAT_TMPLAYER: - GST_DEBUG ("TMPlayer (time based) format detected"); - caps = TMP_CAPS; - break; - /* FIXME: our MPL2 typefinding is not really good enough to warrant - * returning a high probability (however, since we registered our - * typefinder here with a rank of MARGINAL we should pretty much only - * be called if most other typefinders have already run */ - case GST_SUB_PARSE_FORMAT_MPL2: - GST_DEBUG ("MPL2 (time based) format detected"); - caps = MPL2_CAPS; - break; - case GST_SUB_PARSE_FORMAT_SUBVIEWER: - GST_DEBUG ("SubViewer format detected"); - caps = SUB_CAPS; - break; - case GST_SUB_PARSE_FORMAT_DKS: - GST_DEBUG ("DKS format detected"); - caps = DKS_CAPS; - break; - case GST_SUB_PARSE_FORMAT_QTTEXT: - GST_DEBUG ("QTtext format detected"); - caps = QTTEXT_CAPS; - break; - default: - case GST_SUB_PARSE_FORMAT_UNKNOWN: - GST_DEBUG ("no subtitle format detected"); - return; - } - - /* if we're here, it's ok */ - gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, caps); -} - -static gboolean -plugin_init (GstPlugin * plugin) -{ - static gchar *sub_exts[] = { "srt", "sub", "mpsub", "mdvd", "smi", "txt", - "dks", NULL - }; - - GST_DEBUG_CATEGORY_INIT (sub_parse_debug, "subparse", 0, ".sub parser"); - - if (!gst_type_find_register (plugin, "subparse_typefind", GST_RANK_MARGINAL, - gst_subparse_type_find, sub_exts, SUB_CAPS, NULL, NULL)) - return FALSE; - - if (!gst_element_register (plugin, "subparse", - GST_RANK_PRIMARY, GST_TYPE_SUBPARSE) || - !gst_element_register (plugin, "ssaparse", - GST_RANK_PRIMARY, GST_TYPE_SSA_PARSE)) { - return FALSE; - } - - return TRUE; -} - -GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, - GST_VERSION_MINOR, - "subparse", - "Subtitle parsing", - plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN) |