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jpegparse: Warn only malformed data in APP data.

Browse source 
It's only malformed data in APP when its length is less than 6 chars,
because it should have at least an id string. Otherwise, if the id string
is not handled, no warning is raised, only a debug message noticing it.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3943>
This commit is contained in:
Víctor Manuel Jáquez Leal 2023-02-19 10:41:51 +01:00
parent cbc7374c95
commit c61db410f3
1 changed files with 25 additions and 15 deletions
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40
subprojects/gst-plugins-bad/gst/jpegformat/gstjpegparse.c
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@ -368,7 +368,7 @@ gst_jpeg_parse_app0 (GstJpegParse * parse, GstJpegSegment * seg)
guint16 xd, yd;
guint8 unit, xt, yt;
if (seg->size < 14) /* length of interesting data in APP0 */
if (seg->size < 6) /* less than 6 means no id string */
return FALSE;
gst_byte_reader_init (&reader, seg->data + seg->offset, seg->size);
@ -449,7 +449,9 @@ gst_jpeg_parse_app0 (GstJpegParse * parse, GstJpegSegment * seg)
return TRUE;
}
return FALSE;
GST_DEBUG_OBJECT (parse, "Unhandled app0: %s", id_str);
return TRUE;
}
/* *INDENT-OFF* */
@ -473,6 +475,9 @@ gst_jpeg_parse_app1 (GstJpegParse * parse, GstJpegSegment * seg)
const guint8 *data;
gint i;
if (seg->size < 6) /* less than 6 means no id string */
return FALSE;
gst_byte_reader_init (&reader, seg->data + seg->offset, seg->size);
gst_byte_reader_skip_unchecked (&reader, 2);
@ -510,12 +515,15 @@ gst_jpeg_parse_app1 (GstJpegParse * parse, GstJpegSegment * seg)
gst_tag_list_unref (tags);
} else {
GST_INFO_OBJECT (parse, "failed to parse %s: %s", id_str, data);
return FALSE;
}
}
return TRUE;
}
GST_DEBUG_OBJECT (parse, "Unhandled app1: %s", id_str);
return TRUE;
}
@ -526,7 +534,7 @@ gst_jpeg_parse_app14 (GstJpegParse * parse, GstJpegSegment * seg)
const gchar *id_str;
guint8 transform;
if (seg->size < 12) /* length of interesting data in APP14 */
if (seg->size < 6) /* less than 6 means no id string */
return FALSE;
gst_byte_reader_init (&reader, seg->data + seg->offset, seg->size);
@ -535,8 +543,10 @@ gst_jpeg_parse_app14 (GstJpegParse * parse, GstJpegSegment * seg)
if (!gst_byte_reader_get_string_utf8 (&reader, &id_str))
return FALSE;
if (!g_str_has_prefix (id_str, "Adobe"))
return FALSE;
if (!g_str_has_prefix (id_str, "Adobe")) {
GST_DEBUG_OBJECT (parse, "Unhandled app14: %s", id_str);
return TRUE;
}
/* skip version and flags */
if (!gst_byte_reader_skip (&reader, 6))
@ -581,13 +591,13 @@ gst_jpeg_parse_com (GstJpegParse * parse, GstJpegSegment * seg)
return FALSE;
comment = get_utf8_from_data (data, size);
if (!comment)
return FALSE;
if (comment) {
GST_INFO_OBJECT (parse, "comment found: %s", comment);
gst_tag_list_add (get_tag_list (parse), GST_TAG_MERGE_REPLACE,
GST_TAG_COMMENT, comment, NULL);
g_free (comment);
}
GST_INFO_OBJECT (parse, "comment found: %s", comment);
gst_tag_list_add (get_tag_list (parse), GST_TAG_MERGE_REPLACE,
GST_TAG_COMMENT, comment, NULL);
g_free (comment);
return TRUE;
}
@ -769,25 +779,25 @@ gst_jpeg_parse_handle_frame (GstBaseParse * bparse, GstBaseParseFrame * frame,
case GST_JPEG_MARKER_COM:
if (!gst_jpeg_parse_com (parse, &seg)) {
GST_ELEMENT_WARNING (parse, STREAM, FORMAT,
("Failed to parse com segment"), (NULL));
("Failed to parse com segment"), ("Invalid data"));
}
break;
case GST_JPEG_MARKER_APP0:
if (!gst_jpeg_parse_app0 (parse, &seg)) {
GST_ELEMENT_WARNING (parse, STREAM, FORMAT,
("Failed to parse app0 segment"), (NULL));
("Failed to parse app0 segment"), ("Invalid data"));
}
break;
case GST_JPEG_MARKER_APP1:
if (!gst_jpeg_parse_app1 (parse, &seg)) {
GST_ELEMENT_WARNING (parse, STREAM, FORMAT,
("Failed to parse app1 segment"), (NULL));
("Failed to parse app1 segment"), ("Invalid data"));
}
break;
case GST_JPEG_MARKER_APP14:
if (!gst_jpeg_parse_app14 (parse, &seg)) {
GST_ELEMENT_WARNING (parse, STREAM, FORMAT,
("Failed to parse app14 segment"), (NULL));
("Failed to parse app14 segment"), ("Invalid data"));
}
break;
case GST_JPEG_MARKER_DHT: