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/**********
This library is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the
Free Software Foundation; either version 2.1 of the License, or (at your
option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
This library is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
more details.
You should have received a copy of the GNU Lesser General Public License
along with this library; if not, write to the Free Software Foundation, Inc.,
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
**********/
// "liveMedia"
// Copyright (c) 1996-2005 Live Networks, Inc. All rights reserved.
// H.261 Video RTP Sources
// Implementation
#include "H261VideoRTPSource.hh"
H261VideoRTPSource*
H261VideoRTPSource::createNew(UsageEnvironment& env, Groupsock* RTPgs,
unsigned char rtpPayloadFormat,
unsigned rtpTimestampFrequency) {
return new H261VideoRTPSource(env, RTPgs, rtpPayloadFormat,
rtpTimestampFrequency);
}
H261VideoRTPSource
::H261VideoRTPSource(UsageEnvironment& env, Groupsock* RTPgs,
unsigned char rtpPayloadFormat,
unsigned rtpTimestampFrequency)
: MultiFramedRTPSource(env, RTPgs,
rtpPayloadFormat, rtpTimestampFrequency),
fLastSpecialHeader(0) {
}
H261VideoRTPSource::~H261VideoRTPSource() {
}
Boolean H261VideoRTPSource
::processSpecialHeader(BufferedPacket* packet,
unsigned& resultSpecialHeaderSize) {
// There's a 4-byte video-specific header
if (packet->dataSize() < 4) return False;
unsigned char* headerStart = packet->data();
fLastSpecialHeader
= (headerStart[0]<<24)|(headerStart[1]<<16)|(headerStart[2]<<8)|headerStart[3];
#ifdef DELIVER_COMPLETE_FRAMES
fCurrentPacketBeginsFrame = fCurrentPacketCompletesFrame;
// whether the *previous* packet ended a frame
// The RTP "M" (marker) bit indicates the last fragment of a frame:
fCurrentPacketCompletesFrame = packet->rtpMarkerBit();
#endif
resultSpecialHeaderSize = 4;
return True;
}
char const* H261VideoRTPSource::MIMEtype() const {
return "video/H261";
}
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