/**********
|
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 3 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) 1996-2017 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
|
