mediasource.cpp

流媒体传输协议的实现代码,非常有用.可以支持rtsp mms等流媒体传输协议

/**********
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) 1996-2004 Live Networks, Inc.  All rights reserved.
// Media Sources
// Implementation

#include "MediaSource.hh"

////////// MediaSource //////////

MediaSource::MediaSource(UsageEnvironment& env)
	: Medium(env) {
}

MediaSource::~MediaSource() {
}

Boolean MediaSource::isSource() const {
  return True;
}

char const* MediaSource::MIMEtype() const {
  return "application/OCTET-STREAM"; // default type
}

Boolean MediaSource::isFramedSource() const {
  return False; // default implementation
}
Boolean MediaSource::isRTPSource() const {
  return False; // default implementation
}
Boolean MediaSource::isMPEG1or2VideoStreamFramer() const {
  return False; // default implementation
}
Boolean MediaSource::isMPEG4VideoStreamFramer() const {
  return False; // default implementation
}
Boolean MediaSource::isJPEGVideoSource() const {
  return False; // default implementation
}
Boolean MediaSource::isAMRAudioSource() const {
  return False; // default implementation
}

Boolean MediaSource::lookupByName(UsageEnvironment& env,
				  char const* sourceName,
				  MediaSource*& resultSource) {
  resultSource = NULL; // unless we succeed

  Medium* medium;
  if (!Medium::lookupByName(env, sourceName, medium)) return False;

  if (!medium->isSource()) {
    env.setResultMsg(sourceName, " is not a media source");
    return False;
  }

  resultSource = (MediaSource*)medium;
  return True;
}

void MediaSource::getAttributes() const {
  // Default implementation
  envir().setResultMsg("");
}