96 lines
3.3 KiB
C++
Executable File
96 lines
3.3 KiB
C++
Executable File
/**********
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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 2.1 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) 1996-2016 Live Networks, Inc. All rights reserved.
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// RTP sink for MPEG-4 audio, using LATM multiplexing (RFC 3016)
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// Implementation
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#include "MPEG4LATMAudioRTPSink.hh"
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MPEG4LATMAudioRTPSink
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::MPEG4LATMAudioRTPSink(UsageEnvironment& env, Groupsock* RTPgs,
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u_int8_t rtpPayloadFormat,
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u_int32_t rtpTimestampFrequency,
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char const* streamMuxConfigString,
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unsigned numChannels,
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Boolean allowMultipleFramesPerPacket)
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: AudioRTPSink(env, RTPgs, rtpPayloadFormat,
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rtpTimestampFrequency, "MP4A-LATM", numChannels),
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fStreamMuxConfigString(strDup(streamMuxConfigString)),
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fAllowMultipleFramesPerPacket(allowMultipleFramesPerPacket) {
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// Set up the "a=fmtp:" SDP line for this stream:
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char const* fmtpFmt =
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"a=fmtp:%d "
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"cpresent=0;config=%s\r\n";
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unsigned fmtpFmtSize = strlen(fmtpFmt)
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+ 3 /* max char len */
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+ strlen(fStreamMuxConfigString);
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char* fmtp = new char[fmtpFmtSize];
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sprintf(fmtp, fmtpFmt,
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rtpPayloadType(),
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fStreamMuxConfigString);
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fFmtpSDPLine = strDup(fmtp);
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delete[] fmtp;
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}
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MPEG4LATMAudioRTPSink::~MPEG4LATMAudioRTPSink() {
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delete[] fFmtpSDPLine;
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delete[] (char*)fStreamMuxConfigString;
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}
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MPEG4LATMAudioRTPSink*
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MPEG4LATMAudioRTPSink::createNew(UsageEnvironment& env, Groupsock* RTPgs,
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u_int8_t rtpPayloadFormat,
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u_int32_t rtpTimestampFrequency,
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char const* streamMuxConfigString,
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unsigned numChannels,
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Boolean allowMultipleFramesPerPacket) {
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return new MPEG4LATMAudioRTPSink(env, RTPgs, rtpPayloadFormat,
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rtpTimestampFrequency, streamMuxConfigString,
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numChannels,
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allowMultipleFramesPerPacket);
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}
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Boolean MPEG4LATMAudioRTPSink
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::frameCanAppearAfterPacketStart(unsigned char const* /*frameStart*/,
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unsigned /*numBytesInFrame*/) const {
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return fAllowMultipleFramesPerPacket;
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}
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void MPEG4LATMAudioRTPSink
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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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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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// Important: Also call our base class's doSpecialFrameHandling(),
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// to set the packet's timestamp:
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MultiFramedRTPSink::doSpecialFrameHandling(fragmentationOffset,
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frameStart, numBytesInFrame,
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framePresentationTime,
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numRemainingBytes);
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}
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char const* MPEG4LATMAudioRTPSink::auxSDPLine() {
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return fFmtpSDPLine;
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}
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