Hi got some strange behavior when I try to stream H.264 .
I have my implementation of device source class, which directly read entire
frames from
a socket, and feed the H264VideoSink. I have already made a similar class
for MPEG1 ,
and it was working fine...
Here the afterGettingframe of the H264FUAFragmenter misbehave such that when
there is the call
to doNextFrame at the end of the function.. it points nowhere and it
crashes...I have noticed there are always
2 similar executions with both the real source and the fragmenter objects
after the call to afterGetting(this) in device source
PS: this happens since the first call
Here is a trace with gdb :
Breakpoint 1, H264VideoRTPSink::continuePlaying (this=0x8926578) at
H264VideoRTPSink.cpp:74
74 if (fOurFragmenter == NULL) {
(gdb) n
59 UsageEnvironment& envir() const {return fEnviron;}
(gdb)
76 ourMaxPacketSize() - 12/*RTP hdr size*/);
(gdb)
59 UsageEnvironment& envir() const {return fEnviron;}
(gdb)
76 ourMaxPacketSize() - 12/*RTP hdr size*/);
(gdb)
77 fSource = fOurFragmenter;
(gdb) print fOurFragmenter
$1 = (H264FUAFragmenter *) 0x893b6d8 // this is the address of the
fragmenter constructed...
(gdb) n
81 return MultiFramedRTPSink::continuePlaying();
(gdb) c
Continuing.
packet 0 of size 12
DATA::: received: 3744, expected: 3744
Breakpoint 2, DeviceSource::deliverFrame (this=0x89355c8) at
DeviceSource.cpp:201 //this is the address Device object
201 void DeviceSource::deliverFrame() {
(gdb) n
203 if (!isCurrentlyAwaitingData()) return; // we're not ready for the
data yet
(gdb)
205 if(Ntrashed != 0){
(gdb)
210 fFrameSize = Nreceived;
(gdb)
218 gettimeofday(&fPresentationTime, NULL);
(gdb)
52 return __builtin___memcpy_chk (__dest, __src, __len, __bos0
(__dest));
(gdb)
220 fDurationInMicroseconds = DeviceSource::defaultFrameDuration;
(gdb)
52 return __builtin___memcpy_chk (__dest, __src, __len, __bos0
(__dest));
(gdb)
224 FramedSource::afterGetting(this);
(gdb) s
226 }
(gdb)
DeviceSource::deliverFrame (this=0x893b6d8) at DeviceSource.cpp:224 //???
224 FramedSource::afterGetting(this);
(gdb)
FramedSource::afterGetting (source=0x89355c8) at FramedSource.cpp:81 //now
we have the right address again
81 void FramedSource::afterGetting(FramedSource* source) {
(gdb)
87 if (source->fAfterGettingFunc != NULL) {
(gdb)
82 source->fIsCurrentlyAwaitingData = False;
(gdb)
87 if (source->fAfterGettingFunc != NULL) {
(gdb)
91 source->fDurationInMicroseconds);
(gdb)
H264FUAFragmenter::afterGettingFrame (clientData=0x893b6d8, frameSize=3744,
numTruncatedBytes=0, presentationTime=
{tv_sec = 1249394529, tv_usec = 926474}, durationInMicroseconds=40) at
H264VideoRTPSink.cpp:226
226 }
(gdb)
H264FUAFragmenter::afterGettingFrame (clientData=0x89355c8,
frameSize=143898457, numTruncatedBytes=60000,
presentationTime={tv_sec = 134630672, tv_usec = 143898328},
durationInMicroseconds=134523216)
at H264VideoRTPSink.cpp:225
225 durationInMicroseconds); //the parameters seems to
be garbage to me..
(gdb)
H264FUAFragmenter::afterGettingFrame1 (this=0x893b6d8, frameSize=3744,
numTruncatedBytes=0, presentationTime=
{tv_sec = 1249394529, tv_usec = 926474}, durationInMicroseconds=40) at
H264VideoRTPSink.cpp:231
231 unsigned durationInMicroseconds) {
(gdb)
232 fNumValidDataBytes += frameSize;
(gdb)
233 fSaveNumTruncatedBytes = numTruncatedBytes;
(gdb)
234 fPresentationTime = presentationTime;
(gdb)
235 fDurationInMicroseconds = durationInMicroseconds;
(gdb)
238 doGetNextFrame();
(gdb)
239 }
(gdb)
H264FUAFragmenter::afterGettingFrame1 (this=0x89355c8, frameSize=143898457,
numTruncatedBytes=60000,
presentationTime={tv_sec = 134630672, tv_usec = 143898328},
durationInMicroseconds=134523216)
at H264VideoRTPSink.cpp:238
238 doGetNextFrame();
(gdb)
Program received signal SIGSEGV, Segmentation fault.
H264FUAFragmenter::afterGettingFrame1 (this=0x89355c8, frameSize=143898457,
numTruncatedBytes=60000,
presentationTime={tv_sec = 134630672, tv_usec = 143898328},
durationInMicroseconds=134523216)
at H264VideoRTPSink.cpp:238
238 doGetNextFrame();
(gdb) where
#0 H264FUAFragmenter::afterGettingFrame1 (this=0x89355c8,
frameSize=143898457, numTruncatedBytes=60000,
presentationTime={tv_sec = 134630672, tv_usec = 143898328},
durationInMicroseconds=134523216)
at H264VideoRTPSink.cpp:238
#1 0x08064eef in H264FUAFragmenter::doGetNextFrame (this=0x89355c8) at
H264VideoRTPSink.cpp:150
#2 0x0806e06d in MultiFramedRTPSink::packFrame (this=0x8926578) at
MultiFramedRTPSink.cpp:215
#3 0x0806e589 in MultiFramedRTPSink::continuePlaying (this=0x8926578) at
MultiFramedRTPSink.cpp:151
#4 0x08049e4c in play () at H264RTPSender.cpp:97
#5 0x08049fee in main () at H264RTPSender.cpp:68
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