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h264parse: Use faster parsing variant when input is packetized

Browse source 
Reduces latency and cpu usage

https://bugzilla.gnome.org/show_bug.cgi?id=665584
This commit is contained in:
Edward Hervey 2011-12-05 11:50:17 +01:00
parent c4d987b6d3
commit 1c50dab50c
1 changed files with 22 additions and 4 deletions

26
gst/videoparsers/gsth264parse.c
View file

@ -619,8 +619,18 @@ gst_h264_parse_check_valid_frame (GstBaseParse * parse,
GST_DEBUG_OBJECT (h264parse, "last parse position %u", current_off);
while (TRUE) {
switch (gst_h264_parser_identify_nalu (nalparser, data, current_off,
size, &nalu)) {
GstH264ParserResult pres;
if (h264parse->packetized)
pres =
gst_h264_parser_identify_nalu_unchecked (nalparser, data, current_off,
size, &nalu);
else
pres =
gst_h264_parser_identify_nalu (nalparser, data, current_off, size,
&nalu);
switch (pres) {
case GST_H264_PARSER_OK:
GST_DEBUG_OBJECT (h264parse, "complete nal found. "
"current offset: %u, Nal offset: %u, Nal Size: %u",
@ -628,10 +638,12 @@ gst_h264_parse_check_valid_frame (GstBaseParse * parse,
GST_DEBUG_OBJECT (h264parse, "current off. %u",
nalu.offset + nalu.size);
if (!h264parse->nalu.size && !h264parse->nalu.valid)
h264parse->nalu = nalu;
/* need 2 bytes of next nal */
if (nalu.offset + nalu.size + 4 + 2 > size) {
if (!h264parse->packetized && (nalu.offset + nalu.size + 4 + 2 > size)) {
if (GST_BASE_PARSE_DRAINING (parse)) {
drain = TRUE;
} else {
@ -701,6 +713,12 @@ gst_h264_parse_check_valid_frame (GstBaseParse * parse,
/* if no next nal, we know it's complete here */
if (drain || gst_h264_parse_collect_nal (h264parse, data, size, &nalu))
break;
/* In packetized mode we know there's only on NALU in each input packet */
if (h264parse->packetized)
break;
GST_DEBUG_OBJECT (h264parse, "Looking for more");
}
end:
@ -712,8 +730,8 @@ end:
parsing_error:
GST_DEBUG_OBJECT (h264parse, "error parsing Nal Unit");
more:
more:
/* ask for best next available */
*framesize = G_MAXUINT;
if (!h264parse->nalu.size) {