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baseparse: Restrict query/convert responses when demuxing

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If the parser is not parsing a raw elementary stream, restrict
the position, duration and conversion query replies to
things we can sensibly answer about - especially don't do
random conversions to/from bytes.
This commit is contained in:
Jan Schmidt 2016-11-15 23:51:06 +11:00
parent a6ca8dfb42
commit d81c0aec81
1 changed files with 21 additions and 4 deletions
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25
libs/gst/base/gstbaseparse.c
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@ -1711,6 +1711,14 @@ gst_base_parse_convert_default (GstBaseParse * parse,
return TRUE;
}
if (parse->segment.format != GST_FORMAT_BYTES) {
/* don't do byte format conversions if we're not really parsing
* a raw elementary stream, since we don't really have BYTES
* position / duration info */
if (src_format == GST_FORMAT_BYTES || dest_format == GST_FORMAT_BYTES);
goto no_slaved_conversions;
}
/* need at least some frames */
if (!parse->priv->framecount)
goto no_framecount;
@ -1774,7 +1782,12 @@ no_duration_bytes:
G_GUINT64_FORMAT, duration, bytes);
return FALSE;
}
no_slaved_conversions:
{
GST_DEBUG_OBJECT (parse,
"Can't do format conversions when upstream format is not BYTES");
return FALSE;
}
}
static void
@ -4048,7 +4061,10 @@ gst_base_parse_src_query_default (GstBaseParse * parse, GstQuery * query)
if (!res) {
/* Fall back on interpreting segment */
GST_OBJECT_LOCK (parse);
if (format == GST_FORMAT_BYTES) {
/* Only reply BYTES if upstream is in BYTES already, otherwise
* we're not in charge */
if (format == GST_FORMAT_BYTES
&& parse->segment.format == GST_FORMAT_BYTES) {
dest_value = parse->priv->offset;
res = TRUE;
} else if (format == parse->segment.format &&
@ -4058,9 +4074,10 @@ gst_base_parse_src_query_default (GstBaseParse * parse, GstQuery * query)
res = TRUE;
}
GST_OBJECT_UNLOCK (parse);
if (!res) {
if (!res && parse->segment.format == GST_FORMAT_BYTES) {
/* no precise result, upstream no idea either, then best estimate */
/* priv->offset is updated in both PUSH/PULL modes */
/* priv->offset is updated in both PUSH/PULL modes, *iff* we're
* in charge of things */
res = gst_base_parse_convert (parse,
GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
}