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Make sure that the Xing TOC starts with 0 and the entries are increasing over time. Otherwise it's broken and should ...

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Original commit message from CVS:
* ext/mad/gstmad.c: (mpg123_parse_xing_header):
* gst/mpegaudioparse/gstmpegaudioparse.c:
(gst_mp3parse_handle_first_frame):
Make sure that the Xing TOC starts with 0 and the entries
are increasing over time. Otherwise it's broken and should
be skipped. Fixes bug #507821.
This commit is contained in:
Sebastian Dröge 2008-01-08 19:42:38 +00:00
parent 49cdce158d
commit d7f415e09f
3 changed files with 36 additions and 1 deletions
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9
ChangeLog
View file

@ -1,3 +1,12 @@
2008-01-08 Sebastian Dröge <slomo@circular-chaos.org>
* ext/mad/gstmad.c: (mpg123_parse_xing_header):
* gst/mpegaudioparse/gstmpegaudioparse.c:
(gst_mp3parse_handle_first_frame):
Make sure that the Xing TOC starts with 0 and the entries
are increasing over time. Otherwise it's broken and should
be skipped. Fixes bug #507821.
2008-01-08 Tim-Philipp Müller <tim at centricular dot net>
* gst/asfdemux/gstasfdemux.c: (asfdemux_dbg), (gst_asf_demux_reset),

11
ext/mad/gstmad.c
View file

@ -1099,14 +1099,25 @@ mpg123_parse_xing_header (struct mad_header *header,
ptr += 4;
}
if (xflags & XING_TOC_FLAG) {
guchar old = 0;
lprintf ("toc found\n");
if (ptr >= (buf + bufsize - XING_TOC_LENGTH))
return 0;
if (*ptr != 0) {
lprintf ("skipping broken Xing TOC\n");
goto skip_toc;
}
for (i = 0; i < XING_TOC_LENGTH; i++) {
xtoc[i] = *(ptr + i);
if (old > xtoc[i]) {
lprintf ("skipping broken Xing TOC\n");
goto skip_toc;
}
lprintf ("%d ", xtoc[i]);
}
lprintf ("\n");
skip_toc:
ptr += XING_TOC_LENGTH;
}

17
gst/mpegaudioparse/gstmpegaudioparse.c
View file

@ -759,9 +759,23 @@ gst_mp3parse_handle_first_frame (GstMPEGAudioParse * mp3parse)
if (xing_flags & XING_TOC_FLAG) {
int i, percent = 0;
guchar *table = mp3parse->xing_seek_table;
guchar old = 0;
if (data[0] != 0) {
GST_WARNING_OBJECT (mp3parse, "Skipping broken Xing TOC");
mp3parse->xing_flags &= ~XING_TOC_FLAG;
goto skip_toc;
}
/* xing seek table: percent time -> 1/256 bytepos */
memcpy (mp3parse->xing_seek_table, data, 100);
for (i = 0; i < 100; i++) {
mp3parse->xing_seek_table[i] = data[i];
if (old > data[i]) {
GST_WARNING_OBJECT (mp3parse, "Skipping broken Xing TOC");
mp3parse->xing_flags &= ~XING_TOC_FLAG;
goto skip_toc;
}
}
/* build inverse table: 1/256 bytepos -> 1/100 percent time */
for (i = 0; i < 256; i++) {
@ -788,6 +802,7 @@ gst_mp3parse_handle_first_frame (GstMPEGAudioParse * mp3parse)
mp3parse->xing_seek_table_inverse[i] = (guint16) (fx * 100);
}
}
skip_toc:
data += 100;
} else {
memset (mp3parse->xing_seek_table, 0, 100);