ScriptECMAArray::ScriptECMAArray(std::istream& s):frameRate(0)
{
//numVar is an 'approximation' of array size
UI32 numVar;
s >> numVar;
numVar.bswap();
while(1)
{
ScriptDataString varName(s);
//cout << varName.getString() << endl;
UI8 Type;
s >> Type;
switch(Type)
{
case 0: //double (big-endian)
{
uint64_t tmp;
s.read((char*)&tmp,8);
tmp=be64toh(tmp);
double d=*(reinterpret_cast<double*>(&tmp));
//cout << d << endl;
//HACK, extract fps information
if(varName.getString()=="framerate")
frameRate=d;
break;
}
case 1:
{
UI8 b;
s >> b;
//cout << (int)b << endl;
break;
}
case 2:
{
ScriptDataString String(s);
//cout << String.getString() << endl;
break;
}
case 9: //End of array
{
return;
}
default:
throw ParseException("Unexpected type in FLV");
//cout << (int)Type << endl;
}
}
}
FLV_HEADER::FLV_HEADER(std::istream& in):dataOffset(0),_hasAudio(false),_hasVideo(false)
{
UI8 Signature[3];
UI8 Version;
UI32 DataOffset;
in >> Signature[0] >> Signature[1] >> Signature[2] >> Version;
version=Version;
if(Signature[0]=='F' && Signature[1]=='L' && Signature[2]=='V')
{
LOG(LOG_NO_INFO, "FLV file: Version " << (int)Version);
valid=true;
}
else
{
LOG(LOG_NO_INFO,"No FLV file signature found");
valid=false;
return;
}
BitStream bs(in);
if(UB(5, bs)!=0)
{
valid=false;
return;
}
_hasAudio=UB(1, bs);
if(UB(1, bs)!=0)
{
valid=false;
return;
}
_hasVideo=UB(1, bs);
in >> DataOffset;
DataOffset.bswap();
dataOffset = DataOffset;
assert_and_throw(dataOffset==9);
}
void NetStream::execute()
{
if(downloader->hasFailed())
{
sys->currentVm->addEvent(this,Class<Event>::getInstanceS("ioError"));
sys->downloadManager->destroy(downloader);
return;
}
//The downloader hasn't failed yet at this point
//mutex access to downloader
istream s(downloader);
s.exceptions ( istream::eofbit | istream::failbit | istream::badbit );
ThreadProfile* profile=sys->allocateProfiler(RGB(0,0,200));
profile->setTag("NetStream");
//We need to catch possible EOF and other error condition in the non reliable stream
uint32_t decodedAudioBytes=0;
uint32_t decodedVideoFrames=0;
//The decoded time is computed from the decodedAudioBytes to avoid drifts
uint32_t decodedTime=0;
bool waitForFlush=true;
try
{
ScriptDataTag tag;
Chronometer chronometer;
STREAM_TYPE t=classifyStream(s);
if(t==FLV_STREAM)
{
FLV_HEADER h(s);
if(!h.isValid())
throw ParseException("FLV is not valid");
unsigned int prevSize=0;
bool done=false;
do
{
//Check if threadAbort has been called, if so, stop this loop
if(closed)
done = true;
UI32 PreviousTagSize;
s >> PreviousTagSize;
PreviousTagSize.bswap();
assert_and_throw(PreviousTagSize==prevSize);
//Check tag type and read it
UI8 TagType;
s >> TagType;
switch(TagType)
{
case 8:
{
AudioDataTag tag(s);
prevSize=tag.getTotalLen();
if(audioDecoder==NULL)
{
audioCodec=tag.SoundFormat;
switch(tag.SoundFormat)
{
case AAC:
assert_and_throw(tag.isHeader())
#ifdef ENABLE_LIBAVCODEC
audioDecoder=new FFMpegAudioDecoder(tag.SoundFormat,
tag.packetData, tag.packetLen);
#else
audioDecoder=new NullAudioDecoder();
#endif
tag.releaseBuffer();
break;
case MP3:
#ifdef ENABLE_LIBAVCODEC
audioDecoder=new FFMpegAudioDecoder(tag.SoundFormat,NULL,0);
#else
audioDecoder=new NullAudioDecoder();
#endif
decodedAudioBytes+=
audioDecoder->decodeData(tag.packetData,tag.packetLen,decodedTime);
//Adjust timing
decodedTime=decodedAudioBytes/audioDecoder->getBytesPerMSec();
break;
default:
throw RunTimeException("Unsupported SoundFormat");
}
if(audioDecoder->isValid() && sys->audioManager->pluginLoaded())
audioStream=sys->audioManager->createStreamPlugin(audioDecoder);
}
else
{
assert_and_throw(audioCodec==tag.SoundFormat);
decodedAudioBytes+=
audioDecoder->decodeData(tag.packetData,tag.packetLen,decodedTime);
if(audioStream==0 && audioDecoder->isValid() && sys->audioManager->pluginLoaded())
audioStream=sys->audioManager->createStreamPlugin(audioDecoder);
//Adjust timing
decodedTime=decodedAudioBytes/audioDecoder->getBytesPerMSec();
}
break;
}
case 9:
{
VideoDataTag tag(s);
prevSize=tag.getTotalLen();
//If the framerate is known give the right timing, otherwise use decodedTime from audio
uint32_t frameTime=(frameRate!=0.0)?(decodedVideoFrames*1000/frameRate):decodedTime;
if(videoDecoder==NULL)
{
//If the isHeader flag is on then the decoder becomes the owner of the data
if(tag.isHeader())
{
//The tag is the header, initialize decoding
#ifdef ENABLE_LIBAVCODEC
videoDecoder=
new FFMpegVideoDecoder(tag.codec,tag.packetData,tag.packetLen, frameRate);
#else
videoDecoder=new NullVideoDecoder();
#endif
tag.releaseBuffer();
}
else if(videoDecoder==NULL)
{
//First packet but no special handling
#ifdef ENABLE_LIBAVCODEC
videoDecoder=new FFMpegVideoDecoder(tag.codec,NULL,0,frameRate);
#else
videoDecoder=new NullVideoDecoder();
#endif
videoDecoder->decodeData(tag.packetData,tag.packetLen, frameTime);
decodedVideoFrames++;
}
Event* status=Class<NetStatusEvent>::getInstanceS("status", "NetStream.Play.Start");
getVm()->addEvent(this, status);
status->decRef();
status=Class<NetStatusEvent>::getInstanceS("status", "NetStream.Buffer.Full");
getVm()->addEvent(this, status);
status->decRef();
}
else
{
videoDecoder->decodeData(tag.packetData,tag.packetLen, frameTime);
decodedVideoFrames++;
}
break;
}
case 18:
{
tag = ScriptDataTag(s);
prevSize=tag.getTotalLen();
//The frameRate of the container overrides the stream
if(tag.metadataDouble.find("framerate") != tag.metadataDouble.end())
frameRate=tag.metadataDouble["framerate"];
break;
}
default:
LOG(LOG_ERROR,_("Unexpected tag type ") << (int)TagType << _(" in FLV"));
threadAbort();
}
if(!tickStarted && isReady())
{
{
multiname onMetaDataName;
onMetaDataName.name_type=multiname::NAME_STRING;
onMetaDataName.name_s="onMetaData";
onMetaDataName.ns.push_back(nsNameAndKind("",NAMESPACE));
ASObject* callback = client->getVariableByMultiname(onMetaDataName);
if(callback && callback->getObjectType() == T_FUNCTION)
{
ASObject* callbackArgs[1];
ASObject* metadata = Class<ASObject>::getInstanceS();
if(tag.metadataDouble.find("width") != tag.metadataDouble.end())
metadata->setVariableByQName("width", "",
abstract_d(tag.metadataDouble["width"]));
else
metadata->setVariableByQName("width", "", abstract_d(getVideoWidth()));
if(tag.metadataDouble.find("height") != tag.metadataDouble.end())
metadata->setVariableByQName("height", "",
abstract_d(tag.metadataDouble["height"]));
else
metadata->setVariableByQName("height", "", abstract_d(getVideoHeight()));
if(tag.metadataDouble.find("framerate") != tag.metadataDouble.end())
metadata->setVariableByQName("framerate", "",
abstract_d(tag.metadataDouble["framerate"]));
if(tag.metadataDouble.find("duration") != tag.metadataDouble.end())
metadata->setVariableByQName("duration", "",
abstract_d(tag.metadataDouble["duration"]));
if(tag.metadataInteger.find("canseekontime") != tag.metadataInteger.end())
metadata->setVariableByQName("canSeekToEnd", "",
abstract_b(tag.metadataInteger["canseekontime"] == 1));
if(tag.metadataDouble.find("audiodatarate") != tag.metadataDouble.end())
metadata->setVariableByQName("audiodatarate", "",
abstract_d(tag.metadataDouble["audiodatarate"]));
if(tag.metadataDouble.find("videodatarate") != tag.metadataDouble.end())
metadata->setVariableByQName("videodatarate", "",
abstract_d(tag.metadataDouble["videodatarate"]));
//TODO: missing: audiocodecid (Number), cuePoints (Object[]),
//videocodecid (Number), custommetadata's
callbackArgs[0] = metadata;
client->incRef();
metadata->incRef();
FunctionEvent* event =
new FunctionEvent(static_cast<IFunction*>(callback), client, callbackArgs, 1);
getVm()->addEvent(NULL,event);
event->decRef();
}
}
tickStarted=true;
if(frameRate==0)
{
assert(videoDecoder->frameRate);
frameRate=videoDecoder->frameRate;
}
sys->addTick(1000/frameRate,this);
//Also ask for a render rate equal to the video one (capped at 24)
float localRenderRate=dmin(frameRate,24);
sys->setRenderRate(localRenderRate);
}
profile->accountTime(chronometer.checkpoint());
if(aborting)
{
throw JobTerminationException();
}
}
while(!done);
}
else
threadAbort();
}
void NetStream::execute()
{
//mutex access to downloader
istream s(downloader);
s.exceptions ( istream::eofbit | istream::failbit | istream::badbit );
ThreadProfile* profile=sys->allocateProfiler(RGB(0,0,200));
profile->setTag("NetStream");
//We need to catch possible EOF and other error condition in the non reliable stream
try
{
Chronometer chronometer;
STREAM_TYPE t=classifyStream(s);
if(t==FLV_STREAM)
{
FLV_HEADER h(s);
if(!h.isValid())
threadAbort();
unsigned int prevSize=0;
bool done=false;
do
{
UI32 PreviousTagSize;
s >> PreviousTagSize;
PreviousTagSize.bswap();
assert(PreviousTagSize==prevSize);
//Check tag type and read it
UI8 TagType;
s >> TagType;
switch(TagType)
{
case 8:
{
AudioDataTag tag(s);
prevSize=tag.getTotalLen();
break;
}
case 9:
{
VideoDataTag tag(s);
prevSize=tag.getTotalLen();
assert(tag.codecId==7);
if(tag.isHeader())
{
//The tag is the header, initialize decoding
assert(decoder==NULL); //The decoder can be set only once
//NOTE: there is not need to mutex the decoder, as an async transition from NULL to
//valid is not critical
decoder=new FFMpegDecoder(tag.packetData,tag.packetLen);
assert(decoder);
assert(frameRate!=0);
//Now that the decoder is valid, let's start the ticking
sys->addTick(1000/frameRate,this);
//sys->setRenderRate(frameRate);
tag.releaseBuffer();
}
else
decoder->decodeData(tag.packetData,tag.packetLen);
break;
}
case 18:
{
ScriptDataTag tag(s);
prevSize=tag.getTotalLen();
//HACK: initialize frameRate from the container
frameRate=tag.frameRate;
break;
}
default:
cout << (int)TagType << endl;
threadAbort();
}
profile->accountTime(chronometer.checkpoint());
if(aborting)
throw JobTerminationException();
}
while(!done);
}
else
threadAbort();
}
void NetStream::execute()
{
//mutex access to downloader
istream s(downloader);
s.exceptions ( istream::eofbit | istream::failbit | istream::badbit );
ThreadProfile* profile=sys->allocateProfiler(RGB(0,0,200));
profile->setTag("NetStream");
//We need to catch possible EOF and other error condition in the non reliable stream
uint32_t decodedTime=0;
uint32_t videoFrameCount=0;
try
{
Chronometer chronometer;
STREAM_TYPE t=classifyStream(s);
if(t==FLV_STREAM)
{
FLV_HEADER h(s);
if(!h.isValid())
threadAbort();
unsigned int prevSize=0;
bool done=false;
do
{
UI32 PreviousTagSize;
s >> PreviousTagSize;
PreviousTagSize.bswap();
assert_and_throw(PreviousTagSize==prevSize);
//Check tag type and read it
UI8 TagType;
s >> TagType;
switch(TagType)
{
case 8:
{
AudioDataTag tag(s);
prevSize=tag.getTotalLen();
#ifdef ENABLE_SOUND
if(audioDecoder)
{
assert_and_throw(audioCodec==tag.SoundFormat);
uint32_t decodedBytes=audioDecoder->decodeData(tag.packetData,tag.packetLen,decodedTime);
if(soundStreamId==0 && audioDecoder->isValid())
soundStreamId=sys->soundManager->createStream(audioDecoder);
//Adjust timing
decodedTime+=decodedBytes/audioDecoder->getBytesPerMSec();
}
else
{
audioCodec=tag.SoundFormat;
switch(tag.SoundFormat)
{
case AAC:
assert_and_throw(tag.isHeader())
#ifdef ENABLE_LIBAVCODEC
audioDecoder=new FFMpegAudioDecoder(tag.SoundFormat,
tag.packetData, tag.packetLen);
#else
audioDecoder=new NullAudioDecoder();
#endif
break;
default:
throw RunTimeException("Unsupported SoundFormat");
}
if(audioDecoder->isValid())
soundStreamId=sys->soundManager->createStream(audioDecoder);
}
#endif
break;
}
case 9:
{
VideoDataTag tag(s);
prevSize=tag.getTotalLen();
//Reset the current time, the video flow driver the stream
decodedTime=videoFrameCount*1000/frameRate;
videoFrameCount++;
assert_and_throw(tag.codecId==7);
if(tag.isHeader())
{
//The tag is the header, initialize decoding
assert_and_throw(videoDecoder==NULL); //The decoder can be set only once
#ifdef ENABLE_LIBAVCODEC
videoDecoder=new FFMpegVideoDecoder(tag.packetData,tag.packetLen);
#else
videoDecoder=new NullVideoDecoder();
#endif
tag.releaseBuffer();
Event* status=Class<NetStatusEvent>::getInstanceS("status", "NetStream.Play.Start");
getVm()->addEvent(this, status);
status->decRef();
status=Class<NetStatusEvent>::getInstanceS("status", "NetStream.Buffer.Full");
getVm()->addEvent(this, status);
status->decRef();
}
else
videoDecoder->decodeData(tag.packetData,tag.packetLen, decodedTime);
break;
}
case 18:
{
ScriptDataTag tag(s);
prevSize=tag.getTotalLen();
//The frameRate of the container overrides the stream
if(tag.frameRate)
frameRate=tag.frameRate;
break;
}
default:
LOG(LOG_ERROR,"Unexpected tag type " << (int)TagType << " in FLV");
threadAbort();
}
if(!tickStarted && isReady())
{
tickStarted=true;
if(frameRate==0)
{
assert(videoDecoder->frameRate);
frameRate=videoDecoder->frameRate;
}
sys->addTick(1000/frameRate,this);
}
profile->accountTime(chronometer.checkpoint());
if(aborting)
throw JobTerminationException();
}
while(!done);
}
else
threadAbort();
}
