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av1parse: Improve the logic when to drop the OBU.

Browse source 
When drop some OBU, we need to go on. The current manner will make
the data access out range of the buffer mapping.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1979>
This commit is contained in:
He Junyan 2021-01-23 17:26:25 +08:00 committed by Víctor Manuel Jáquez Leal
parent e8bb0fa062
commit a9c8aa4788
1 changed files with 9 additions and 15 deletions
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24
gst/videoparsers/gstav1parse.c
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@ -1191,7 +1191,7 @@ gst_av1_parse_handle_obu_to_obu (GstBaseParse * parse,
total_consumed = 0;
again:
while (TRUE) {
while (total_consumed < map_info.size) {
frame_complete = FALSE;
res = gst_av1_parser_identify_one_obu (self->parser,
map_info.data + total_consumed, map_info.size - total_consumed,
@ -1202,12 +1202,8 @@ again:
break;
total_consumed += consumed;
g_assert (total_consumed <= map_info.size);
if (total_consumed >= map_info.size)
break;
}
g_assert (total_consumed <= map_info.size);
if (total_consumed) {
/* If we get something, always output it even already met some error.
@ -1255,6 +1251,7 @@ again:
} else if (res == GST_AV1_PARSER_DROP) {
GST_DEBUG_OBJECT (parse, "Drop %d data", consumed);
total_consumed += consumed;
res = GST_AV1_PARSER_OK;
goto again;
} else if (res != GST_AV1_PARSER_OK) {
GST_ERROR_OBJECT (parse, "Parse obu get unexpect error %d", res);
@ -1295,7 +1292,7 @@ gst_av1_parse_handle_to_small_and_equal_align (GstBaseParse * parse,
total_consumed = 0;
frame_complete = FALSE;
again:
while (TRUE) {
while (total_consumed < map_info.size) {
res = gst_av1_parser_identify_one_obu (self->parser,
map_info.data + total_consumed, map_info.size - total_consumed,
&obu, &consumed);
@ -1324,11 +1321,8 @@ again:
if (self->align == GST_AV1_PARSE_ALIGN_FRAME && frame_complete)
break;
g_assert (total_consumed <= map_info.size);
if (total_consumed >= map_info.size)
break;
}
g_assert (total_consumed <= map_info.size);
if (res == GST_AV1_PARSER_BITSTREAM_ERROR) {
/* Discard the whole frame */
@ -1350,6 +1344,7 @@ again:
} else if (res == GST_AV1_PARSER_DROP) {
GST_DEBUG_OBJECT (parse, "Drop %d data", consumed);
total_consumed += consumed;
res = GST_AV1_PARSER_OK;
goto again;
} else if (res != GST_AV1_PARSER_OK) {
GST_ERROR_OBJECT (parse, "Parse obu get unexpect error %d", res);
@ -1489,6 +1484,7 @@ again:
} else if (res == GST_AV1_PARSER_DROP) {
GST_DEBUG_OBJECT (parse, "Drop %d data", consumed);
self->last_parsed_offset += consumed;
res = GST_AV1_PARSER_OK;
goto again;
} else if (res == GST_AV1_PARSER_OK) {
/* Everything is correct but still not get a frame or tu,
@ -1537,7 +1533,7 @@ gst_av1_parse_detect_alignment (GstBaseParse * parse,
got_frame = FALSE;
total_consumed = 0;
again:
while (TRUE) {
while (total_consumed < map_info.size) {
res = gst_av1_parser_identify_one_obu (self->parser,
map_info.data + total_consumed, map_info.size - total_consumed,
&obu, &consumed);
@ -1557,9 +1553,6 @@ again:
if (got_seq || got_frame)
break;
if (total_consumed >= map_info.size)
break;
}
gst_av1_parser_reset (self->parser, FALSE);
@ -1576,6 +1569,7 @@ again:
goto out;
} else if (res == GST_AV1_PARSER_DROP) {
total_consumed += consumed;
res = GST_AV1_PARSER_OK;
goto again;
}