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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
**********/
// Copyright (c) 1996-2007, Live Networks, Inc. All rights reserved
// A subclass of "RTSPServer" that creates "ServerMediaSession"s on demand,
// based on whether or not the specified stream name exists as a file
// Implementation
#include "DynamicRTSPServer.hh"
#include <liveMedia.hh>
#include <string.h>
DynamicRTSPServer*
DynamicRTSPServer::createNew(UsageEnvironment& env, Port ourPort,
UserAuthenticationDatabase* authDatabase) {
int ourSocket = -1;
do {
int ourSocket = setUpOurSocket(env, ourPort);
if (ourSocket == -1) break;
return new DynamicRTSPServer(env, ourSocket, ourPort, authDatabase);
} while (0);
if (ourSocket != -1) ::closeSocket(ourSocket);
return NULL;
}
DynamicRTSPServer::DynamicRTSPServer(UsageEnvironment& env, int ourSocket,
Port ourPort,
UserAuthenticationDatabase* authDatabase)
: RTSPServer(env, ourSocket, ourPort, authDatabase, 45/*reclamationTestSeconds*/) {
}
DynamicRTSPServer::~DynamicRTSPServer() {
}
static ServerMediaSession* createNewSMS(UsageEnvironment& env,
char const* fileName, FILE* fid); // forward
ServerMediaSession*
DynamicRTSPServer::lookupServerMediaSession(char const* streamName) {
// First, check whether the specified "streamName" exists as a local file:
FILE* fid = fopen(streamName, "rb");
Boolean fileExists = fid != NULL;
// Next, check whether we already have a "ServerMediaSession" for this file:
ServerMediaSession* sms = RTSPServer::lookupServerMediaSession(streamName);
Boolean smsExists = sms != NULL;
// Handle the four possibilities for "fileExists" and "smsExists":
if (!fileExists) {
if (smsExists) {
// "sms" was created for a file that no longer exists. Remove it:
removeServerMediaSession(sms);
}
return NULL;
} else {
if (!smsExists) {
// Create a new "ServerMediaSession" object for streaming from the named file.
sms = createNewSMS(envir(), streamName, fid);
addServerMediaSession(sms);
}
fclose(fid);
return sms;
}
}
#define NEW_SMS(description) do {\
char* descStr = description\
", streamed by the LIVE555 Media Server";\
sms = ServerMediaSession::createNew(env, fileName, fileName, descStr);\
} while(0)
static ServerMediaSession* createNewSMS(UsageEnvironment& env,
char const* fileName, FILE* /*fid*/) {
// Use the file name extension to determine the type of "ServerMediaSession":
char* extension = strrchr(fileName, '.');
if (extension == NULL) return NULL;
ServerMediaSession* sms = NULL;
Boolean const reuseSource = False;
if (strcmp(extension, ".aac") == 0) {
// Assumed to be an AAC Audio (ADTS format) file:
NEW_SMS("AAC Audio");
sms->addSubsession(ADTSAudioFileServerMediaSubsession::createNew(env, fileName, reuseSource));
} else if (strcmp(extension, ".amr") == 0) {
// Assumed to be an AMR Audio file:
NEW_SMS("AMR Audio");
sms->addSubsession(AMRAudioFileServerMediaSubsession::createNew(env, fileName, reuseSource));
} else if (strcmp(extension, ".m4e") == 0) {
// Assumed to be a MPEG-4 Video Elementary Stream file:
NEW_SMS("MPEG-4 Video");
sms->addSubsession(MPEG4VideoFileServerMediaSubsession::createNew(env, fileName, reuseSource));
} else if (strcmp(extension, ".mp3") == 0) {
// Assumed to be a MPEG-1 or 2 Audio file:
NEW_SMS("MPEG-1 or 2 Audio");
// To stream using 'ADUs' rather than raw MP3 frames, uncomment the following:
//#define STREAM_USING_ADUS 1
// To also reorder ADUs before streaming, uncomment the following:
//#define INTERLEAVE_ADUS 1
// (For more information about ADUs and interleaving,
// see <http://www.live555.com/rtp-mp3/>)
Boolean useADUs = False;
Interleaving* interleaving = NULL;
#ifdef STREAM_USING_ADUS
useADUs = True;
#ifdef INTERLEAVE_ADUS
unsigned char interleaveCycle[] = {0,2,1,3}; // or choose your own...
unsigned const interleaveCycleSize
= (sizeof interleaveCycle)/(sizeof (unsigned char));
interleaving = new Interleaving(interleaveCycleSize, interleaveCycle);
#endif
#endif
sms->addSubsession(MP3AudioFileServerMediaSubsession::createNew(env, fileName, reuseSource, useADUs, interleaving));
} else if (strcmp(extension, ".mpg") == 0) {
// Assumed to be a MPEG-1 or 2 Program Stream (audio+video) file:
NEW_SMS("MPEG-1 or 2 Program Stream");
MPEG1or2FileServerDemux* demux
= MPEG1or2FileServerDemux::createNew(env, fileName, reuseSource);
sms->addSubsession(demux->newVideoServerMediaSubsession());
sms->addSubsession(demux->newAudioServerMediaSubsession());
} else if (strcmp(extension, ".ts") == 0) {
// Assumed to be a MPEG Transport Stream file:
// Use an index file name that's the same as the TS file name, except with ".tsx":
unsigned indexFileNameLen = strlen(fileName) + 2; // allow for trailing "x\0"
char* indexFileName = new char[indexFileNameLen];
sprintf(indexFileName, "%sx", fileName);
NEW_SMS("MPEG Transport Stream");
sms->addSubsession(MPEG2TransportFileServerMediaSubsession::createNew(env, fileName, indexFileName, reuseSource));
} else if (strcmp(extension, ".wav") == 0) {
// Assumed to be a WAV Audio file:
NEW_SMS("WAV Audio Stream");
// To convert 16-bit PCM data to 8-bit u-law, prior to streaming,
// change the following to True:
Boolean convertToULaw = False;
sms->addSubsession(WAVAudioFileServerMediaSubsession::createNew(env, fileName, reuseSource, convertToULaw));
}
return sms;
}
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