MediaCodec: cosmetic
MediaCodec: lock acodec while reconfigure, flush
MediaCodec: no need to call start after flush
MediaCodec: lock acodec while reconfigure, flush
MediaCodec: remove unused code
ff_ffplay: fix leak
test: 720p
ffpipeline: fallback to sw decode
MediaCodec: always dequeue output buffer first
MediaCodec: abandon ownership even failed to release buffer
android/IjkMediaPlayer: fix incorrect video size notify
MediaCodec: use different mutex,cond