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av1parse: Continue when we fail to detect the alignment.

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Some streams may have problematic OBUs at the beginning, which causes
the parse fail to detect the alignment and return error. For example,
there may be verbose OBUs before a valid sequence, which should be
discarded until we meet a valid sequence. We should let the parse
continue when we meet such cases, rather than just return error.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1634>
This commit is contained in:
He Junyan 2022-02-04 11:40:18 +08:00
parent 32633a9a14
commit 348658dd0a
1 changed files with 20 additions and 16 deletions
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36
subprojects/gst-plugins-bad/gst/videoparsers/gstav1parse.c
View file

@ -1654,7 +1654,7 @@ out:
/* Try to recognize whether the input is annex-b format. */
static GstFlowReturn
gst_av1_parse_detect_alignment (GstBaseParse * parse,
GstBaseParseFrame * frame, gint * skipsize)
GstBaseParseFrame * frame, gint * skipsize, guint32 * total_consumed)
{
GstAV1Parse *self = GST_AV1_PARSE (parse);
GstMapInfo map_info;
@ -1663,7 +1663,7 @@ gst_av1_parse_detect_alignment (GstBaseParse * parse,
GstBuffer *buffer = gst_buffer_ref (frame->buffer);
gboolean got_seq, got_frame;
gboolean frame_complete;
guint32 consumed, total_consumed;
guint32 consumed;
guint32 frame_sz;
GstFlowReturn ret = GST_FLOW_OK;
@ -1678,19 +1678,20 @@ gst_av1_parse_detect_alignment (GstBaseParse * parse,
/* Detect the alignment obu first */
got_seq = FALSE;
got_frame = FALSE;
total_consumed = 0;
*total_consumed = 0;
again:
while (total_consumed < map_info.size) {
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,
map_info.data + *total_consumed, map_info.size - *total_consumed,
&obu, &consumed);
if (res == GST_AV1_PARSER_OK)
if (res == GST_AV1_PARSER_OK) {
*total_consumed += consumed;
res = gst_av1_parse_handle_one_obu (self, &obu, &frame_complete);
}
if (res != GST_AV1_PARSER_OK)
break;
total_consumed += consumed;
if (obu.obu_type == GST_AV1_OBU_SEQUENCE_HEADER)
got_seq = TRUE;
if (obu.obu_type == GST_AV1_OBU_REDUNDANT_FRAME_HEADER ||
@ -1715,7 +1716,7 @@ again:
ret = GST_FLOW_OK;
goto out;
} else if (res == GST_AV1_PARSER_DROP) {
total_consumed += consumed;
*total_consumed += consumed;
res = GST_AV1_PARSER_OK;
goto again;
}
@ -1812,17 +1813,20 @@ gst_av1_parse_handle_frame (GstBaseParse * parse,
}
if (self->in_align == GST_AV1_PARSE_ALIGN_NONE) {
guint32 consumed = 0;
/* Only happend at the first time of handle_frame, and the
alignment in the sink caps is unset. Try the default and
if error, try the annex B. */
ret = gst_av1_parse_detect_alignment (parse, frame, skipsize);
if (ret == GST_FLOW_OK && self->in_align != GST_AV1_PARSE_ALIGN_NONE)
ret = gst_av1_parse_detect_alignment (parse, frame, skipsize, &consumed);
if (ret == GST_FLOW_OK && self->in_align != GST_AV1_PARSE_ALIGN_NONE) {
GST_INFO_OBJECT (self, "Detect the input alignment %d", self->in_align);
}
if (self->in_align == GST_AV1_PARSE_ALIGN_NONE) {
GST_ERROR_OBJECT (self, "Input alignment is unknown");
return GST_FLOW_ERROR;
} else {
*skipsize = consumed > 0 ? consumed : gst_buffer_get_size (frame->buffer);
GST_WARNING_OBJECT (self, "Fail to detect the alignment, skip %d",
*skipsize);
return GST_FLOW_OK;
}
}
/* We may in pull mode and no caps is set */