only one thread decode 16 h264 streams,but deak lock sometimes

[waiter89]

//here is my code,only in one thread
SharedPtr vb = yami->decoder_->getOutput(); //invoke getOutput before decode
status = yami->decoder_->decode(&inputBuffer);

//here deak lock
#0 0x00007ffff568d09f in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1 0x00007fffd932ce51 in YamiMediaCodec::Condition::wait (this=0x7fffb85bf058) at ../common/condition.h:41
#2 YamiMediaCodec::VaapiDecSurfacePool::acquireWithWait (this=0x7fffb85beeb0) at vaapidecsurfacepool.cpp:114
#3 0x00007fffd9316c40 in YamiMediaCodec::VaapiDecoderBase::createSurface (this=this@entry=0x2d7f260) at vaapidecoder_base.cpp:319
#4 0x00007fffd931f696 in YamiMediaCodec::VaapiDecoderH264::createPicture (this=this@entry=0x2d7f260, slice=slice@entry=0x7fffb8849870, nalu=nalu@entry=0x7fffc2ffc850) at vaapidecoder_h264.cpp:1672
#5 0x00007fffd9322796 in YamiMediaCodec::VaapiDecoderH264::decodeSlice (this=this@entry=0x2d7f260, nalu=0x7fffc2ffc850) at vaapidecoder_h264.cpp:1725
#6 0x00007fffd932289b in YamiMediaCodec::VaapiDecoderH264::decodeNalu (this=0x2d7f260, nalu=) at vaapidecoder_h264.cpp:1754
#7 0x00007fffd93229f3 in YamiMediaCodec::VaapiDecoderH264::decode (this=0x2d7f260, buffer=) at vaapidecoder_h264.cpp:1806
#8 0x00007fffd92f2e22 in sw_decodec (Acodec=0x2d80550, Ainput=0x7fffbc1eec50, AiLen=4100) at ../shanwei_yami/shanwei_yami.cpp:800

another question =》should I use more than one thread to decode? because only one gpu.

[xuguangxin]

Put decode in diffrent thread maybe helpful,becuase you need get things from network or render. you can refer to our video wall application, it will decoder in diffrent thread, https://github.com/01org/libyami-utils/blob/master/examples/grid.cpp

[xuguangxin]

You need make vb out of scope when you used it, did you push vb to some queue?

[xuguangxin]

this mentioned in #493 too.

[xuguangxin]

Hi @waiter89 , #704 will not block the decoder, please have a try.
thanks

[xuguangxin]

fixed by fbbafc8