| /********** |
| 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) 1996-2015 Live Networks, Inc. All rights reserved. |
| // RTP sink for Vorbis audio |
| // C++ header |
| |
| #ifndef _VORBIS_AUDIO_RTP_SINK_HH |
| #define _VORBIS_AUDIO_RTP_SINK_HH |
| |
| #ifndef _AUDIO_RTP_SINK_HH |
| #include "AudioRTPSink.hh" |
| #endif |
| |
| class VorbisAudioRTPSink: public AudioRTPSink { |
| public: |
| static VorbisAudioRTPSink* |
| createNew(UsageEnvironment& env, Groupsock* RTPgs, u_int8_t rtpPayloadFormat, |
| u_int32_t rtpTimestampFrequency, unsigned numChannels, |
| // The following headers provide the 'configuration' information, for the SDP description: |
| u_int8_t* identificationHeader, unsigned identificationHeaderSize, |
| u_int8_t* commentHeader, unsigned commentHeaderSize, |
| u_int8_t* setupHeader, unsigned setupHeaderSize, |
| u_int32_t identField = 0xFACADE); |
| |
| static VorbisAudioRTPSink* |
| createNew(UsageEnvironment& env, Groupsock* RTPgs, u_int8_t rtpPayloadFormat, |
| u_int32_t rtpTimestampFrequency, unsigned numChannels, |
| char const* configStr); |
| // an optional variant of "createNew()" that takes a Base-64-encoded 'configuration' string, |
| // rather than the raw configuration headers as parameter. |
| |
| protected: |
| VorbisAudioRTPSink(UsageEnvironment& env, Groupsock* RTPgs, |
| u_int8_t rtpPayloadFormat, u_int32_t rtpTimestampFrequency, unsigned numChannels, |
| u_int8_t* identificationHeader, unsigned identificationHeaderSize, |
| u_int8_t* commentHeader, unsigned commentHeaderSize, |
| u_int8_t* setupHeader, unsigned setupHeaderSize, |
| u_int32_t identField); |
| // called only by createNew() |
| |
| virtual ~VorbisAudioRTPSink(); |
| |
| private: // redefined virtual functions: |
| virtual char const* auxSDPLine(); // for the "a=fmtp:" SDP line |
| |
| virtual void doSpecialFrameHandling(unsigned fragmentationOffset, |
| unsigned char* frameStart, |
| unsigned numBytesInFrame, |
| struct timeval framePresentationTime, |
| unsigned numRemainingBytes); |
| virtual Boolean frameCanAppearAfterPacketStart(unsigned char const* frameStart, |
| unsigned numBytesInFrame) const; |
| virtual unsigned specialHeaderSize() const; |
| virtual unsigned frameSpecificHeaderSize() const; |
| |
| private: |
| u_int32_t fIdent; // "Ident" field used by this stream. (Only the low 24 bits of this are used.) |
| char* fFmtpSDPLine; |
| }; |
| |
| |
| // A general function used by both "VorbisAudioRTPSink" and "TheoraVideoRTPSink" to construct |
| // a Base64-encoded 'config' string (for SDP) from "identification", "comment", "setup" headers. |
| // (Note: The result string was heap-allocated, and the caller should delete[] it afterwards.) |
| |
| char* generateVorbisOrTheoraConfigStr(u_int8_t* identificationHeader, unsigned identificationHeaderSize, |
| u_int8_t* commentHeader, unsigned commentHeaderSize, |
| u_int8_t* setupHeader, unsigned setupHeaderSize, |
| u_int32_t identField); |
| |
| #endif |