ijksdl: introduce IJKSDL_Class
avplayer error init
jni: remove cpp for x86
ff_ffplay: merge 90c9b494052e6110f43f3db8cc8f6720550b397b

ffplay: fix mem leak when opening input or parsing options fail.
avplayer didPlaybackStateChange频率
Merge branch 'master' of https://github.com/bbcallen/ijkplayer
stop-reset后message_loop正常，不会出现weak_thiz为null