132 lines
5.0 KiB
C++
Executable File
132 lines
5.0 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 H.264 video (RFC 3984)
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// Implementation
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#include "H264VideoRTPSink.hh"
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#include "H264VideoStreamFramer.hh"
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#include "Base64.hh"
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#include "H264VideoRTPSource.hh" // for "parseSPropParameterSets()"
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////////// H264VideoRTPSink implementation //////////
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H264VideoRTPSink
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::H264VideoRTPSink(UsageEnvironment& env, Groupsock* RTPgs, unsigned char rtpPayloadFormat,
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u_int8_t const* sps, unsigned spsSize, u_int8_t const* pps, unsigned ppsSize)
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: H264or5VideoRTPSink(264, env, RTPgs, rtpPayloadFormat,
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NULL, 0, sps, spsSize, pps, ppsSize) {
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}
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H264VideoRTPSink::~H264VideoRTPSink() {
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}
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H264VideoRTPSink* H264VideoRTPSink
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::createNew(UsageEnvironment& env, Groupsock* RTPgs, unsigned char rtpPayloadFormat) {
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return new H264VideoRTPSink(env, RTPgs, rtpPayloadFormat);
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}
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H264VideoRTPSink* H264VideoRTPSink
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::createNew(UsageEnvironment& env, Groupsock* RTPgs, unsigned char rtpPayloadFormat,
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u_int8_t const* sps, unsigned spsSize, u_int8_t const* pps, unsigned ppsSize) {
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return new H264VideoRTPSink(env, RTPgs, rtpPayloadFormat, sps, spsSize, pps, ppsSize);
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}
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H264VideoRTPSink* H264VideoRTPSink
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::createNew(UsageEnvironment& env, Groupsock* RTPgs, unsigned char rtpPayloadFormat,
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char const* sPropParameterSetsStr) {
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u_int8_t* sps = NULL; unsigned spsSize = 0;
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u_int8_t* pps = NULL; unsigned ppsSize = 0;
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unsigned numSPropRecords;
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SPropRecord* sPropRecords = parseSPropParameterSets(sPropParameterSetsStr, numSPropRecords);
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for (unsigned i = 0; i < numSPropRecords; ++i) {
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if (sPropRecords[i].sPropLength == 0) continue; // bad data
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u_int8_t nal_unit_type = (sPropRecords[i].sPropBytes[0])&0x1F;
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if (nal_unit_type == 7/*SPS*/) {
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sps = sPropRecords[i].sPropBytes;
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spsSize = sPropRecords[i].sPropLength;
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} else if (nal_unit_type == 8/*PPS*/) {
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pps = sPropRecords[i].sPropBytes;
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ppsSize = sPropRecords[i].sPropLength;
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}
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}
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H264VideoRTPSink* result
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= new H264VideoRTPSink(env, RTPgs, rtpPayloadFormat, sps, spsSize, pps, ppsSize);
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delete[] sPropRecords;
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return result;
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}
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Boolean H264VideoRTPSink::sourceIsCompatibleWithUs(MediaSource& source) {
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// Our source must be an appropriate framer:
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return source.isH264VideoStreamFramer();
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}
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char const* H264VideoRTPSink::auxSDPLine() {
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// Generate a new "a=fmtp:" line each time, using our SPS and PPS (if we have them),
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// otherwise parameters from our framer source (in case they've changed since the last time that
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// we were called):
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H264or5VideoStreamFramer* framerSource = NULL;
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u_int8_t* vpsDummy = NULL; unsigned vpsDummySize = 0;
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u_int8_t* sps = fSPS; unsigned spsSize = fSPSSize;
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u_int8_t* pps = fPPS; unsigned ppsSize = fPPSSize;
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if (sps == NULL || pps == NULL) {
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// We need to get SPS and PPS from our framer source:
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if (fOurFragmenter == NULL) return NULL; // we don't yet have a fragmenter (and therefore not a source)
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framerSource = (H264or5VideoStreamFramer*)(fOurFragmenter->inputSource());
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if (framerSource == NULL) return NULL; // we don't yet have a source
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framerSource->getVPSandSPSandPPS(vpsDummy, vpsDummySize, sps, spsSize, pps, ppsSize);
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if (sps == NULL || pps == NULL) return NULL; // our source isn't ready
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}
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// Set up the "a=fmtp:" SDP line for this stream:
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u_int8_t* spsWEB = new u_int8_t[spsSize]; // "WEB" means "Without Emulation Bytes"
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unsigned spsWEBSize = removeH264or5EmulationBytes(spsWEB, spsSize, sps, spsSize);
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if (spsWEBSize < 4) { // Bad SPS size => assume our source isn't ready
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delete[] spsWEB;
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return NULL;
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}
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u_int32_t profileLevelId = (spsWEB[1]<<16) | (spsWEB[2]<<8) | spsWEB[3];
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delete[] spsWEB;
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char* sps_base64 = base64Encode((char*)sps, spsSize);
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char* pps_base64 = base64Encode((char*)pps, ppsSize);
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char const* fmtpFmt =
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"a=fmtp:%d packetization-mode=1"
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";profile-level-id=%06X"
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";sprop-parameter-sets=%s,%s\r\n";
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unsigned fmtpFmtSize = strlen(fmtpFmt)
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+ 3 /* max char len */
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+ 6 /* 3 bytes in hex */
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+ strlen(sps_base64) + strlen(pps_base64);
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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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profileLevelId,
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sps_base64, pps_base64);
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delete[] sps_base64;
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delete[] pps_base64;
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delete[] fFmtpSDPLine; fFmtpSDPLine = fmtp;
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return fFmtpSDPLine;
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}
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