72 lines
2.4 KiB
C++
Executable File
72 lines
2.4 KiB
C++
Executable File
/**********
|
|
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.,
|
|
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
**********/
|
|
// "liveMedia"
|
|
// Copyright (c) 1996-2016 Live Networks, Inc. All rights reserved.
|
|
// RTP sink for VP9 video
|
|
// Implementation
|
|
|
|
#include "VP9VideoRTPSink.hh"
|
|
|
|
VP9VideoRTPSink
|
|
::VP9VideoRTPSink(UsageEnvironment& env, Groupsock* RTPgs, unsigned char rtpPayloadFormat)
|
|
: VideoRTPSink(env, RTPgs, rtpPayloadFormat, 90000, "VP9") {
|
|
}
|
|
|
|
VP9VideoRTPSink::~VP9VideoRTPSink() {
|
|
}
|
|
|
|
VP9VideoRTPSink*
|
|
VP9VideoRTPSink::createNew(UsageEnvironment& env, Groupsock* RTPgs, unsigned char rtpPayloadFormat) {
|
|
return new VP9VideoRTPSink(env, RTPgs, rtpPayloadFormat);
|
|
}
|
|
|
|
Boolean VP9VideoRTPSink
|
|
::frameCanAppearAfterPacketStart(unsigned char const* /*frameStart*/,
|
|
unsigned /*numBytesInFrame*/) const {
|
|
// A packet can contain only one frame
|
|
return False;
|
|
}
|
|
|
|
void VP9VideoRTPSink
|
|
::doSpecialFrameHandling(unsigned fragmentationOffset,
|
|
unsigned char* /*frameStart*/,
|
|
unsigned /*numBytesInFrame*/,
|
|
struct timeval framePresentationTime,
|
|
unsigned numRemainingBytes) {
|
|
// Set the "VP9 Payload Descriptor" (just the minimal required 1-byte version):
|
|
u_int8_t vp9PayloadDescriptor = fragmentationOffset == 0 ? 0x10 : 0x00;
|
|
// I = L = F = V = U = 0; S = 1 iff this is the first (or only) fragment of the frame
|
|
|
|
if (numRemainingBytes == 0) {
|
|
// This packet contains the last (or only) fragment of the frame.
|
|
// Set the E bit:
|
|
vp9PayloadDescriptor |= 0x08;
|
|
// Also set the RTP 'M' ('marker') bit:
|
|
setMarkerBit();
|
|
}
|
|
|
|
setSpecialHeaderBytes(&vp9PayloadDescriptor, 1);
|
|
|
|
// Also set the RTP timestamp:
|
|
setTimestamp(framePresentationTime);
|
|
}
|
|
|
|
|
|
unsigned VP9VideoRTPSink::specialHeaderSize() const {
|
|
// We include only the required 1-byte form of the "VP9 Payload Descriptor":
|
|
return 1;
|
|
}
|