79 lines
3.0 KiB
C++
79 lines
3.0 KiB
C++
/**********
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This library is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by the
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Free Software Foundation; either version 3 of the License, or (at your
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option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
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This library is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
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more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this library; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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**********/
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// "liveMedia"
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// Copyright (c) 1996-2020 Live Networks, Inc. All rights reserved.
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#include "JPEG2000VideoRTPSink.hh"
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JPEG2000VideoRTPSink::JPEG2000VideoRTPSink(UsageEnvironment& env, Groupsock* RTPgs)
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: VideoRTPSink(env, RTPgs, 98, 90000, "jpeg2000") {}
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JPEG2000VideoRTPSink::~JPEG2000VideoRTPSink() {}
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JPEG2000VideoRTPSink*
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JPEG2000VideoRTPSink::createNew(UsageEnvironment& env, Groupsock* RTPgs) {
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return new JPEG2000VideoRTPSink(env, RTPgs);
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}
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#define JPEG2000_PAYLOAD_HEADER_SIZE 8
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void JPEG2000VideoRTPSink
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::doSpecialFrameHandling(unsigned fragmentationOffset,
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unsigned char* frameStart,
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unsigned numBytesInFrame,
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struct timeval framePresentationTime,
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unsigned numRemainingBytes) {
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// Fill in the Payload Header:
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u_int8_t payloadHeader[JPEG2000_PAYLOAD_HEADER_SIZE];
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// For "tp", assume for now that the payload is progressively scanned (i.e., tp = 0)
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// For "MHF", assume that a whole main header is present (i.e., MHF = 3), *unless* we're
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// the second or later packet of a fragment, in which case we assume that it's not (i.e. MHF = 0)
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// For "mh_id", set this to 0 (as specified in RFC 5371).
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// For "T" (Tile field invalidation flag), set this to 0 (we don't set the "tile number" field).
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payloadHeader[0] = fragmentationOffset > 0 ? 0x00 : 0x30;
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// Set the "priority" field to 255, as specified in RFC 5371:
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payloadHeader[1] = 255;
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// Set the "tile number" field to 0:
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payloadHeader[2] = payloadHeader[3] = 0;
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// Set the "reserved" field to 0, as specified in RFC 5371:
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payloadHeader[4] = 0;
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// Set the "fragmentation offset" field to the value of our "fragmentationOffset" parameter:
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payloadHeader[5] = (u_int8_t)(fragmentationOffset>>16);
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payloadHeader[6] = (u_int8_t)(fragmentationOffset>>8);
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payloadHeader[7] = (u_int8_t)(fragmentationOffset);
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// Write the payload header to the outgoing packet:
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setSpecialHeaderBytes(payloadHeader, sizeof payloadHeader);
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if (numRemainingBytes == 0) {
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// This packet contains the last (or only) fragment of the frame.
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// Set the RTP 'M' ('marker') bit
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setMarkerBit();
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}
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// Also set the RTP timestamp:
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setTimestamp(framePresentationTime);
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}
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unsigned JPEG2000VideoRTPSink::specialHeaderSize() const {
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return JPEG2000_PAYLOAD_HEADER_SIZE;
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}
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