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gst/rtp/: Correctly calculate size of each H263+ RTP buffer taking into account MTU and

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Original commit message from CVS:
* gst/rtp/gstrtph263pdepay.c:
* gst/rtp/gstrtph263ppay.c:
Correctly calculate size of each H263+ RTP buffer taking into account MTU and
RTP header.
This commit is contained in:
Philippe Kalaf 2006-09-20 19:37:45 +00:00
parent e28d3b2a92
commit f1533c5504
3 changed files with 22 additions and 6 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2006-09-20 Philippe Kalaf <philippe.kalaf at collabora.co.uk>
* gst/rtp/gstrtph263pdepay.c:
* gst/rtp/gstrtph263ppay.c:
Correctly calculate size of each H263+ RTP buffer taking into account MTU and
RTP header.
2006-09-20 Wim Taymans <wim@fluendo.com>
* gst/rtp/Makefile.am:

1
gst/rtp/gstrtph263pdepay.c
View file

@ -205,6 +205,7 @@ gst_rtp_h263p_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
payload[header_len + 1] = 0;
}
/* FIXME do not ignore the VRC header (See RFC 2429 section 4.2) */
/* strip off header */
payload += header_len;
payload_len -= header_len;

20
gst/rtp/gstrtph263ppay.c
View file

@ -163,6 +163,14 @@ gst_rtp_h263p_pay_flush (GstRtpH263PPay * rtph263ppay)
fragmented = FALSE;
/* This algorithm assumes the H263+ encoder sends complete frames in each
* buffer */
/* This algorithm implements the Follow-on packets method for packetization.
* This assumes low packet loss network. A more resilient method would be to
* separate large frames at synchronisation points (Segments) (See RFC 2429
* section 6). It would be interesting to have a property such as network
* quality to select between both packetization methods */
/* TODO Add VRC supprt (See RFC 2429 section 4.2) */
while (avail > 0) {
guint towrite;
guint8 *payload;
@ -170,13 +178,13 @@ gst_rtp_h263p_pay_flush (GstRtpH263PPay * rtph263ppay)
guint payload_len;
gint header_len;
/* FIXME, do better mtu packing, header len etc should be
* included in this calculation. */
towrite = MIN (avail, GST_BASE_RTP_PAYLOAD_MTU (rtph263ppay));
/* for fragmented frames we need 2 bytes header, for other
* frames we must reuse the first 2 bytes of the data as the
* header */
/* for picture start frames (non-fragmented), we need to remove the first
* two 0x00 bytes and set P=1 */
header_len = (fragmented ? 2 : 0);
towrite = MIN (avail, gst_rtp_buffer_calc_payload_len
(GST_BASE_RTP_PAYLOAD_MTU (rtph263ppay) - header_len, 0, 0));
payload_len = header_len + towrite;
outbuf = gst_rtp_buffer_new_allocate (payload_len, 0, 0);