char const* H264VideoRTPSink::auxSDPLine() {
liveLogInfo(" H264VideoRTPSink::auxSDPLine \n");
// Generate a new "a=fmtp:" line each time, using our SPS and PPS (if we have them),
// otherwise parameters from our framer source (in case they've changed since the last time that
// we were called):
H264or5VideoStreamFramer* framerSource = NULL;
u_int8_t* vpsDummy = NULL; unsigned vpsDummySize = 0;
u_int8_t* sps = fSPS; unsigned spsSize = fSPSSize;
u_int8_t* pps = fPPS; unsigned ppsSize = fPPSSize;
if (sps == NULL || pps == NULL) {
// We need to get SPS and PPS from our framer source:
if (fOurFragmenter == NULL) return NULL; // we don't yet have a fragmenter (and therefore not a source)
framerSource = (H264or5VideoStreamFramer*)(fOurFragmenter->inputSource());
if (framerSource == NULL) return NULL; // we don't yet have a source
framerSource->getVPSandSPSandPPS(vpsDummy, vpsDummySize, sps, spsSize, pps, ppsSize);
if (sps == NULL || pps == NULL) return NULL; // our source isn't ready
}
// Set up the "a=fmtp:" SDP line for this stream:
u_int8_t* spsWEB = new u_int8_t[spsSize]; // "WEB" means "Without Emulation Bytes"
unsigned spsWEBSize = removeH264or5EmulationBytes(spsWEB, spsSize, sps, spsSize);
if (spsWEBSize < 4) { // Bad SPS size => assume our source isn't ready
delete[] spsWEB;
return NULL;
}
u_int32_t profileLevelId = (spsWEB[1]<<16) | (spsWEB[2]<<8) | spsWEB[3];
delete[] spsWEB;
char* sps_base64 = base64Encode((char*)sps, spsSize);
char* pps_base64 = base64Encode((char*)pps, ppsSize);
char const* fmtpFmt =
"a=fmtp:%d packetization-mode=1"
";profile-level-id=%06X"
";sprop-parameter-sets=%s,%s\r\n";
unsigned fmtpFmtSize = strlen(fmtpFmt)
+ 3 /* max char len */
+ 6 /* 3 bytes in hex */
+ strlen(sps_base64) + strlen(pps_base64);
char* fmtp = new char[fmtpFmtSize];
sprintf(fmtp, fmtpFmt,
rtpPayloadType(),
profileLevelId,
sps_base64, pps_base64);
delete[] sps_base64;
delete[] pps_base64;
delete[] fFmtpSDPLine; fFmtpSDPLine = fmtp;
return fFmtpSDPLine;
}
void H264or5VideoRTPSink::doSpecialFrameHandling(unsigned /*fragmentationOffset*/,
unsigned char* /*frameStart*/,
unsigned /*numBytesInFrame*/,
struct timeval framePresentationTime,
unsigned /*numRemainingBytes*/) {
// Set the RTP 'M' (marker) bit iff
// 1/ The most recently delivered fragment was the end of (or the only fragment of) an NAL unit, and
// 2/ This NAL unit was the last NAL unit of an 'access unit' (i.e. video frame).
if (fOurFragmenter != NULL) {
H264or5VideoStreamFramer* framerSource
= (H264or5VideoStreamFramer*)(fOurFragmenter->inputSource());
// This relies on our fragmenter's source being a "H264or5VideoStreamFramer".
if (((H264or5Fragmenter*)fOurFragmenter)->lastFragmentCompletedNALUnit()
&& framerSource != NULL && framerSource->pictureEndMarker()) {
setMarkerBit();
framerSource->pictureEndMarker() = False;
}
}
setTimestamp(framePresentationTime);
}
char const* H265VideoRTPSink::auxSDPLine() {
// Generate a new "a=fmtp:" line each time, using our VPS, SPS and PPS (if we have them),
// otherwise parameters from our framer source (in case they've changed since the last time that
// we were called):
H264or5VideoStreamFramer* framerSource = NULL;
u_int8_t* vps = fVPS; unsigned vpsSize = fVPSSize;
u_int8_t* sps = fSPS; unsigned spsSize = fSPSSize;
u_int8_t* pps = fPPS; unsigned ppsSize = fPPSSize;
if (vps == NULL || sps == NULL || pps == NULL) {
// We need to get VPS, SPS and PPS from our framer source:
if (fOurFragmenter == NULL) return NULL; // we don't yet have a fragmenter (and therefore not a source)
framerSource = (H264or5VideoStreamFramer*)(fOurFragmenter->inputSource());
if (framerSource == NULL) return NULL; // we don't yet have a source
framerSource->getVPSandSPSandPPS(vps, vpsSize, sps, spsSize, pps, ppsSize);
if (vps == NULL || sps == NULL || pps == NULL) {
return NULL; // our source isn't ready
}
}
// Set up the "a=fmtp:" SDP line for this stream.
u_int8_t* vpsWEB = new u_int8_t[vpsSize]; // "WEB" means "Without Emulation Bytes"
unsigned vpsWEBSize = removeH264or5EmulationBytes(vpsWEB, vpsSize, vps, vpsSize);
if (vpsWEBSize < 6/*'profile_tier_level' offset*/ + 12/*num 'profile_tier_level' bytes*/) {
// Bad VPS size => assume our source isn't ready
delete[] vpsWEB;
return NULL;
}
u_int8_t const* profileTierLevelHeaderBytes = &vpsWEB[6];
unsigned profileSpace = profileTierLevelHeaderBytes[0]>>6; // general_profile_space
unsigned profileId = profileTierLevelHeaderBytes[0]&0x1F; // general_profile_idc
unsigned tierFlag = (profileTierLevelHeaderBytes[0]>>5)&0x1; // general_tier_flag
unsigned levelId = profileTierLevelHeaderBytes[11]; // general_level_idc
u_int8_t const* interop_constraints = &profileTierLevelHeaderBytes[5];
char interopConstraintsStr[100];
sprintf(interopConstraintsStr, "%02X%02X%02X%02X%02X%02X",
interop_constraints[0], interop_constraints[1], interop_constraints[2],
interop_constraints[3], interop_constraints[4], interop_constraints[5]);
delete[] vpsWEB;
char* sprop_vps = base64Encode((char*)vps, vpsSize);
char* sprop_sps = base64Encode((char*)sps, spsSize);
char* sprop_pps = base64Encode((char*)pps, ppsSize);
char const* fmtpFmt =
"a=fmtp:%d profile-space=%u"
";profile-id=%u"
";tier-flag=%u"
";level-id=%u"
";interop-constraints=%s"
";sprop-vps=%s"
";sprop-sps=%s"
";sprop-pps=%s\r\n";
unsigned fmtpFmtSize = strlen(fmtpFmt)
+ 3 /* max num chars: rtpPayloadType */ + 20 /* max num chars: profile_space */
+ 20 /* max num chars: profile_id */
+ 20 /* max num chars: tier_flag */
+ 20 /* max num chars: level_id */
+ strlen(interopConstraintsStr)
+ strlen(sprop_vps)
+ strlen(sprop_sps)
+ strlen(sprop_pps);
char* fmtp = new char[fmtpFmtSize];
sprintf(fmtp, fmtpFmt,
rtpPayloadType(), profileSpace,
profileId,
tierFlag,
levelId,
interopConstraintsStr,
sprop_vps,
sprop_sps,
sprop_pps);
delete[] sprop_vps;
delete[] sprop_sps;
delete[] sprop_pps;
delete[] fFmtpSDPLine; fFmtpSDPLine = fmtp;
return fFmtpSDPLine;
}