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/**********
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.,
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
**********/
// "liveMedia"
// Copyright (c) 1996-2005 Live Networks, Inc. All rights reserved.
// RTP source for 'ADUized' MP3 frames ("mpa-robust")
// Implementation
#include "MP3ADURTPSource.hh"
#include "MP3ADUdescriptor.hh"
////////// ADUBufferedPacket and ADUBufferedPacketFactory //////////
class ADUBufferedPacket: public BufferedPacket {
private: // redefined virtual functions
virtual unsigned nextEnclosedFrameSize(unsigned char*& framePtr,
unsigned dataSize);
};
class ADUBufferedPacketFactory: public BufferedPacketFactory {
private: // redefined virtual functions
virtual BufferedPacket* createNewPacket(MultiFramedRTPSource* ourSource);
};
///////// MP3ADURTPSource implementation ////////
MP3ADURTPSource*
MP3ADURTPSource::createNew(UsageEnvironment& env, Groupsock* RTPgs,
unsigned char rtpPayloadFormat,
unsigned rtpTimestampFrequency) {
return new MP3ADURTPSource(env, RTPgs, rtpPayloadFormat,
rtpTimestampFrequency);
}
MP3ADURTPSource::MP3ADURTPSource(UsageEnvironment& env, Groupsock* RTPgs,
unsigned char rtpPayloadFormat,
unsigned rtpTimestampFrequency)
: MultiFramedRTPSource(env, RTPgs,
rtpPayloadFormat, rtpTimestampFrequency,
new ADUBufferedPacketFactory) {
}
MP3ADURTPSource::~MP3ADURTPSource() {
}
char const* MP3ADURTPSource::MIMEtype() const {
return "audio/MPA-ROBUST";
}
////////// ADUBufferedPacket and ADUBufferredPacketFactory implementation
unsigned ADUBufferedPacket
::nextEnclosedFrameSize(unsigned char*& framePtr, unsigned dataSize) {
// Return the size of the next MP3 'ADU', on the assumption that
// the input data is ADU-encoded MP3 frames.
unsigned char* frameDataPtr = framePtr;
unsigned remainingFrameSize
= ADUdescriptor::getRemainingFrameSize(frameDataPtr);
unsigned descriptorSize = (unsigned)(frameDataPtr - framePtr);
unsigned fullADUSize = descriptorSize + remainingFrameSize;
return (fullADUSize <= dataSize) ? fullADUSize : dataSize;
}
BufferedPacket* ADUBufferedPacketFactory
::createNewPacket(MultiFramedRTPSource* /*ourSource*/) {
return new ADUBufferedPacket;
}
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