Android Audio代码分析 Audiostyle

    status_t AudioFlinger::PlaybackThread::Track::start()
    {
    status_t status  NO_ERROR;
    LOGV(,
            mName, IPCThreadState::self()getCallingPid(), mSessionId);
    sp mThread.promote();
    if) {
        Mutex::Autolock _l(threadmLock);
        int mState;
        // here the track could be either new, or restarted
        // in both cases "unstop" the trackif PAUSED) {
            mState  TrackBase::RESUMING;
            LOGV(this);
        } else {
            mState  TrackBase::ACTIVE;
            LOGV(this);
        }
    
    
        if RESUMING) {