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ristrtpdeext: Update RTP header extension packet to latest spec

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Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1153>
This commit is contained in:
Olivier Crête 2020-03-18 17:34:47 -04:00 committed by Olivier Crête
parent a602eb7eea
commit f2e8d4dcf2
2 changed files with 38 additions and 33 deletions
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40
gst/rist/gstristrtpdeext.c
View file

@ -103,9 +103,9 @@ gst_rist_rtp_deext_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
guint16 bits;
guint8 npd_bits;
guint8 num_packets_deleted;
guint16 seqnumext_val = 0;
guint extlen;
gpointer extdata;
gpointer extdata = NULL;
guint8 *data = NULL;
guint8 *payload;
guint plen;
guint i;
@ -127,24 +127,32 @@ gst_rist_rtp_deext_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
return gst_pad_push (self->srcpad, buffer);
}
has_drop_null = (bits >> 15) & 1; /* N */
has_seqnum_ext = (bits >> 14) & 1; /* E */
orig_ts_packet_count = (bits >> 10) & 7; /* Size */
ts_packet_size = ((bits >> 7) & 1) ? 204 : 188;
npd_bits = bits & 0x7F;
if (bits != ('R' << 8 | 'I')) {
gst_rtp_buffer_unmap (&rtp);
GST_LOG_OBJECT (self, "Buffer %" GST_PTR_FORMAT
" has an extension that's not the RIST one, ignoring", buffer);
return gst_pad_push (self->srcpad, buffer);
}
if (extlen != 1) {
gst_rtp_buffer_unmap (&rtp);
GST_LOG_OBJECT (self, "Buffer %" GST_PTR_FORMAT
" has a RIST extension that's not of length 1, ignoring", buffer);
return gst_pad_push (self->srcpad, buffer);
}
data = extdata;
has_drop_null = (data[0] >> 7) & 1; /* N */
has_seqnum_ext = (data[0] >> 6) & 1; /* E */
orig_ts_packet_count = (data[0] >> 3) & 7; /* Size */
ts_packet_size = ((data[1] >> 7) & 1) ? 204 : 188;
npd_bits = data[1] & 0x7F;
num_packets_deleted = bit_count (npd_bits);
if (has_seqnum_ext && extlen >= 1) {
seqnumext_val = GST_READ_UINT16_BE (extdata);
GST_LOG_OBJECT (self, "Seqnum ext is %d\n", seqnumext_val);
} else if (has_seqnum_ext && extlen == 0) {
GST_WARNING_OBJECT (self, "Has seqnum flag, but extension is too short");
has_seqnum_ext = FALSE;
seqnumext_val = 0;
}
if (has_seqnum_ext) {
guint16 seqnumext_val = GST_READ_UINT16_BE (data + 2);
guint32 extseqnum = seqnumext_val << 16 | gst_rtp_buffer_get_seq (&rtp);
if (extseqnum < self->max_extseqnum &&

31
tests/check/elements/ristrtpext.c
View file

@ -628,27 +628,24 @@ alloc_ts_buffer_with_ext (guint num_ts_packets, gboolean has_drop_null,
GstBuffer *buf = alloc_ts_buffer (num_ts_packets);
GstRTPBuffer rtp = GST_RTP_BUFFER_INIT;
guint8 *payload;
guint16 bits;
guint8 *data;
guint i;
bits = 0;
bits |= has_drop_null << 15; /* N */
bits |= has_seqnum_ext << 14; /* E */
bits |= (MIN (orig_ts_packet_count, 7) & 7) << 10; /* Size */
bits |= (ts_packet_size == 204) << 7; /* T */
bits |= (npd_bits & 0x7F);
gst_rtp_buffer_map (buf, GST_MAP_READWRITE, &rtp);
gst_rtp_buffer_set_extension_data (&rtp, bits,
(has_seqnum_ext && extseq != 0xFFFF) ? 1 : 0);
if (has_seqnum_ext && extseq != 0xFFFF) {
guint8 *data;
guint wordlen;
gst_rtp_buffer_set_extension_data (&rtp, 'R' << 8 | 'I', 1);
gst_rtp_buffer_get_extension_data (&rtp, NULL, (void **) &data, NULL);
data[0] = has_drop_null << 7; /* N */
data[0] |= has_seqnum_ext << 6; /* E */
data[0] |= (MIN (orig_ts_packet_count, 7) & 7) << 2; /* Size */
data[1] = (ts_packet_size == 204) << 7; /* T */
data[1] |= (npd_bits & 0x7F);
if (has_seqnum_ext && extseq != 0xFFFF)
GST_WRITE_UINT16_BE (data + 2, extseq);
else
GST_WRITE_UINT16_BE (data + 2, 0);
gst_rtp_buffer_get_extension_data (&rtp, &bits, (void **) &data, &wordlen);
GST_WRITE_UINT16_BE (data, extseq);
data[2] = data[3] = 0;
}
payload = gst_rtp_buffer_get_payload (&rtp);
for (i = 0; i < num_ts_packets; i++) {