stagefright框架_启动stagefright_stagefright怎么解决(7)

(2) Stagefright中的video便依據從AudioPlayer得出來之兩個時間戳的差值，作為播放的依據void AwesomePlayer::onVideoEvent(){...mVideoSource->read(&mVideoBuffer, ...);mVideoBuffer->meta_data()->findInt64(kKeyTime, &timeUs);mAudioPlayer->getMediaTimeMapping(&realTimeUs, &mediaTimeUs);mTimeSourceDeltaUs = realTimeUs - mediaTimeUs;nowUs = ts->getRealTimeUs() - mTimeSourceDeltaUs;latenessUs = nowUs - timeUs;...}AwesomePlayer從AudioPlayer取得realTimeUs(即mPositionTimeRealUs)和mediaTimeUs(即mPositionTimeMediaUs)，並算出其差值mTimeSourceDeltaUs。

(3) 最後我們將該video資料做排程void AwesomePlayer::onVideoEvent(){...if (latenessUs > 40000){mVideoBuffer->release();mVideoBuffer = NULL;postVideoEvent_l();return;}if (latenessUs < -10000){postVideoEvent_l(10000);return;}mVideoRenderer->render(mVideoBuffer);...}

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