1/**********
2This library is free software; you can redistribute it and/or modify it under
3the terms of the GNU Lesser General Public License as published by the
4Free Software Foundation; either version 3 of the License, or (at your
5option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
6
7This library is distributed in the hope that it will be useful, but WITHOUT
8ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
9FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
10more details.
11
12You should have received a copy of the GNU Lesser General Public License
13along with this library; if not, write to the Free Software Foundation, Inc.,
1451 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
15**********/
16// "liveMedia"
17// Copyright (c) 1996-2020 Live Networks, Inc. All rights reserved.
18
19#include "JPEG2000VideoRTPSink.hh"
20
21JPEG2000VideoRTPSink::JPEG2000VideoRTPSink(UsageEnvironment& env, Groupsock* RTPgs)
22 : VideoRTPSink(env, RTPgs, 98, 90000, "jpeg2000") {}
23
24JPEG2000VideoRTPSink::~JPEG2000VideoRTPSink() {}
25
26JPEG2000VideoRTPSink*
27JPEG2000VideoRTPSink::createNew(UsageEnvironment& env, Groupsock* RTPgs) {
28 return new JPEG2000VideoRTPSink(env, RTPgs);
29}
30
31#define JPEG2000_PAYLOAD_HEADER_SIZE 8
32
33void JPEG2000VideoRTPSink
34::doSpecialFrameHandling(unsigned fragmentationOffset,
35 unsigned char* frameStart,
36 unsigned numBytesInFrame,
37 struct timeval framePresentationTime,
38 unsigned numRemainingBytes) {
39 // Fill in the Payload Header:
40 u_int8_t payloadHeader[JPEG2000_PAYLOAD_HEADER_SIZE];
41
42 // For "tp", assume for now that the payload is progressively scanned (i.e., tp = 0)
43 // For "MHF", assume that a whole main header is present (i.e., MHF = 3), *unless* we're
44 // the second or later packet of a fragment, in which case we assume that it's not (i.e. MHF = 0)
45 // For "mh_id", set this to 0 (as specified in RFC 5371).
46 // For "T" (Tile field invalidation flag), set this to 0 (we don't set the "tile number" field).
47 payloadHeader[0] = fragmentationOffset > 0 ? 0x00 : 0x30;
48
49 // Set the "priority" field to 255, as specified in RFC 5371:
50 payloadHeader[1] = 255;
51
52 // Set the "tile number" field to 0:
53 payloadHeader[2] = payloadHeader[3] = 0;
54
55 // Set the "reserved" field to 0, as specified in RFC 5371:
56 payloadHeader[4] = 0;
57
58 // Set the "fragmentation offset" field to the value of our "fragmentationOffset" parameter:
59 payloadHeader[5] = (u_int8_t)(fragmentationOffset>>16);
60 payloadHeader[6] = (u_int8_t)(fragmentationOffset>>8);
61 payloadHeader[7] = (u_int8_t)(fragmentationOffset);
62
63 // Write the payload header to the outgoing packet:
64 setSpecialHeaderBytes(payloadHeader, sizeof payloadHeader);
65
66 if (numRemainingBytes == 0) {
67 // This packet contains the last (or only) fragment of the frame.
68 // Set the RTP 'M' ('marker') bit
69 setMarkerBit();
70 }
71
72 // Also set the RTP timestamp:
73 setTimestamp(framePresentationTime);
74}
75
76unsigned JPEG2000VideoRTPSink::specialHeaderSize() const {
77 return JPEG2000_PAYLOAD_HEADER_SIZE;
78}
79