liveMedia/JPEG2000VideoRTPSource.cpp

/**********
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 3 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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
**********/
// "liveMedia"
// Copyright (c) 1996-2020 Live Networks, Inc.  All rights reserved.


#include "JPEG2000VideoRTPSource.hh"

JPEG2000VideoRTPSource*
JPEG2000VideoRTPSource::createNew(UsageEnvironment& env,
				  Groupsock* RTPgs,
				  unsigned char rtpPayloadFormat,
				  unsigned rtpTimestampFrequency,
				  char const* sampling) {
  return new JPEG2000VideoRTPSource(env, RTPgs, rtpPayloadFormat, rtpTimestampFrequency, sampling);
}

JPEG2000VideoRTPSource
::JPEG2000VideoRTPSource(UsageEnvironment& env, Groupsock* RTPgs,
			 unsigned char rtpPayloadFormat, unsigned rtpTimestampFrequency,
			 char const* sampling)
  : MultiFramedRTPSource(env, RTPgs, rtpPayloadFormat, rtpTimestampFrequency) {
  fSampling = strDup(sampling);
}

JPEG2000VideoRTPSource::~JPEG2000VideoRTPSource() {
  delete[] fSampling;
}

#define JPEG2000_PAYLOAD_HEADER_SIZE 8

Boolean JPEG2000VideoRTPSource
::processSpecialHeader(BufferedPacket* packet,
		       unsigned& resultSpecialHeaderSize) {
  unsigned char* headerStart = packet->data();
  unsigned packetSize = packet->dataSize();

  // There should be enough space for a payload header:
  if (packetSize < JPEG2000_PAYLOAD_HEADER_SIZE) return False;

  u_int32_t fragmentOffset = (headerStart[5]<<16)|(headerStart[6]<<8)|(headerStart[7]);
  fCurrentPacketBeginsFrame = fragmentOffset == 0;
  fCurrentPacketCompletesFrame = packet->rtpMarkerBit();

  resultSpecialHeaderSize = JPEG2000_PAYLOAD_HEADER_SIZE;
  return True;
}

char const* JPEG2000VideoRTPSource::MIMEtype() const {
  return "video/JPEG2000";
}