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h264parse: don't invalidate the last PPS when parsing a new SPS

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When a SPS is received then any previous PPS remains valid. So don't clear
the PPS flag from the parser state.

This is important because there are encoders that don't generated a PPS after
every SPS.

Closes https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/issues/571

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2019>
This commit is contained in:
Michael Olbrich 2021-01-28 12:28:03 +01:00 committed by Nicolas Dufresne
parent 66bfd0e8ae
commit 5a03862fca
2 changed files with 71 additions and 1 deletions
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2
gst/videoparsers/gsth264parse.c
View file

@ -953,7 +953,7 @@ gst_h264_parse_process_nal (GstH264Parse * h264parse, GstH264NalUnit * nalu)
case GST_H264_NAL_SPS:
/* reset state, everything else is obsolete */
h264parse->state = 0;
h264parse->state &= GST_H264_PARSE_STATE_GOT_PPS;
pres = gst_h264_parser_parse_sps (nalparser, nalu, &sps);
process_sps:

70
tests/check/elements/h264parse.c
View file

@ -1082,6 +1082,75 @@ GST_START_TEST (test_parse_sliced_nal_au)
GST_END_TEST;
GST_START_TEST (test_parse_sliced_sps_pps_sps)
{
GstHarness *h = gst_harness_new ("h264parse");
GstBuffer *buf;
gst_harness_set_caps_str (h,
"video/x-h264,stream-format=byte-stream,alignment=nal,parsed=false,framerate=30/1",
"video/x-h264,stream-format=byte-stream,alignment=au,parsed=true");
buf = wrap_buffer (h264_slicing_sps, sizeof (h264_slicing_sps), 100, 0);
fail_unless_equals_int (gst_harness_push (h, buf), GST_FLOW_OK);
buf = wrap_buffer (h264_slicing_pps, sizeof (h264_slicing_pps), 100, 0);
fail_unless_equals_int (gst_harness_push (h, buf), GST_FLOW_OK);
buf = wrap_buffer (h264_idr_slice_1, sizeof (h264_idr_slice_1), 100, 0);
fail_unless_equals_int (gst_harness_push (h, buf), GST_FLOW_OK);
/* no output yet, it will be pushed as soon as
* the parser recognizes the new AU */
fail_unless_equals_int (gst_harness_buffers_in_queue (h), 0);
buf = wrap_buffer (h264_slicing_sps, sizeof (h264_slicing_sps), 200, 0);
fail_unless_equals_int (gst_harness_push (h, buf), GST_FLOW_OK);
/* no PP, just a SPS here is valid */
buf = wrap_buffer (h264_idr_slice_1, sizeof (h264_idr_slice_1), 200, 0);
fail_unless_equals_int (gst_harness_push (h, buf), GST_FLOW_OK);
fail_unless_equals_int (gst_harness_buffers_in_queue (h), 1);
buf = wrap_buffer (h264_idr_slice_1, sizeof (h264_idr_slice_1), 300, 0);
fail_unless_equals_int (gst_harness_push (h, buf), GST_FLOW_OK);
fail_unless_equals_int (gst_harness_buffers_in_queue (h), 2);
{
GstMapInfo info;
buf = composite_buffer (100, 0, 4,
h264_aud, sizeof (h264_aud),
h264_slicing_sps, sizeof (h264_slicing_sps),
h264_slicing_pps, sizeof (h264_slicing_pps),
h264_idr_slice_1, sizeof (h264_idr_slice_1));
gst_buffer_map (buf, &info, GST_MAP_READ);
pull_and_check_full (h, info.data, info.size, 100, 0);
gst_buffer_unmap (buf, &info);
gst_buffer_unref (buf);
buf = composite_buffer (200, 0, 3,
h264_aud, sizeof (h264_aud),
h264_slicing_sps, sizeof (h264_slicing_sps),
h264_idr_slice_1, sizeof (h264_idr_slice_1));
gst_buffer_map (buf, &info, GST_MAP_READ);
pull_and_check_full (h, info.data, info.size, 200, 0);
gst_buffer_unmap (buf, &info);
gst_buffer_unref (buf);
}
gst_harness_teardown (h);
}
GST_END_TEST;
static Suite *
h264parse_sliced_suite (void)
@ -1093,6 +1162,7 @@ h264parse_sliced_suite (void)
tcase_add_test (tc_chain, test_parse_sliced_nal_nal);
tcase_add_test (tc_chain, test_parse_sliced_au_nal);
tcase_add_test (tc_chain, test_parse_sliced_nal_au);
tcase_add_test (tc_chain, test_parse_sliced_sps_pps_sps);
return s;
}