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matroskademux: Only check for markup and escape if necessary for plaintext subtitles

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Otherwise we break USF and ASS/SSA subtitles.
This commit is contained in:
Sebastian Dröge 2011-12-01 13:34:52 +01:00
parent 91834bf80b
commit 588734b291
2 changed files with 22 additions and 13 deletions
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33
gst/matroska/matroska-demux.c
View file

@ -2943,22 +2943,25 @@ gst_matroska_demux_check_subtitle_buffer (GstElement * element,
size = GST_BUFFER_SIZE (*buf);
next:
/* caps claim markup text, so we need to escape text,
* except if text is already markup and then needs no further escaping */
sub_stream->seen_markup_tag = sub_stream->seen_markup_tag ||
gst_matroska_demux_subtitle_chunk_has_tag (element, data);
if (!sub_stream->seen_markup_tag) {
utf8 = g_markup_escape_text (data, size);
if (sub_stream->check_markup) {
/* caps claim markup text, so we need to escape text,
* except if text is already markup and then needs no further escaping */
sub_stream->seen_markup_tag = sub_stream->seen_markup_tag ||
gst_matroska_demux_subtitle_chunk_has_tag (element, data);
newbuf = gst_buffer_new ();
GST_BUFFER_MALLOCDATA (newbuf) = (guint8 *) utf8;
GST_BUFFER_DATA (newbuf) = (guint8 *) utf8;
GST_BUFFER_SIZE (newbuf) = strlen (utf8);
gst_buffer_copy_metadata (newbuf, *buf, GST_BUFFER_COPY_ALL);
gst_buffer_unref (*buf);
if (!sub_stream->seen_markup_tag) {
utf8 = g_markup_escape_text (data, size);
*buf = newbuf;
newbuf = gst_buffer_new ();
GST_BUFFER_MALLOCDATA (newbuf) = (guint8 *) utf8;
GST_BUFFER_DATA (newbuf) = (guint8 *) utf8;
GST_BUFFER_SIZE (newbuf) = strlen (utf8);
gst_buffer_copy_metadata (newbuf, *buf, GST_BUFFER_COPY_ALL);
gst_buffer_unref (*buf);
*buf = newbuf;
}
}
return GST_FLOW_OK;
@ -5394,15 +5397,19 @@ gst_matroska_demux_subtitle_caps (GstMatroskaTrackSubtitleContext *
/* well, plain text simply does not have a lot of markup ... */
caps = gst_caps_new_simple ("text/x-pango-markup", NULL);
context->postprocess_frame = gst_matroska_demux_check_subtitle_buffer;
subtitlecontext->check_markup = TRUE;
} else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_SUBTITLE_SSA)) {
caps = gst_caps_new_simple ("application/x-ssa", NULL);
context->postprocess_frame = gst_matroska_demux_check_subtitle_buffer;
subtitlecontext->check_markup = TRUE;
} else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_SUBTITLE_ASS)) {
caps = gst_caps_new_simple ("application/x-ass", NULL);
context->postprocess_frame = gst_matroska_demux_check_subtitle_buffer;
subtitlecontext->check_markup = FALSE;
} else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_SUBTITLE_USF)) {
caps = gst_caps_new_simple ("application/x-usf", NULL);
context->postprocess_frame = gst_matroska_demux_check_subtitle_buffer;
subtitlecontext->check_markup = FALSE;
} else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_SUBTITLE_VOBSUB)) {
caps = gst_caps_new_simple ("video/x-dvd-subpicture", NULL);
((GstMatroskaTrackContext *) subtitlecontext)->send_dvd_event = TRUE;

2
gst/matroska/matroska-ids.h
View file

@ -569,6 +569,8 @@ typedef struct _GstMatroskaTrackSubtitleContext {
GstMatroskaTrackContext parent;
gboolean check_utf8; /* buffers should be valid UTF-8 */
gboolean check_markup; /* check if buffers contain markup
* or plaintext and escape characters */
gboolean invalid_utf8; /* work around broken files */
gboolean seen_markup_tag; /* markup found in text */
} GstMatroskaTrackSubtitleContext;