Merge "libaudioclient: fix AudioTrack blocking write after underrun" into main

            ts = NULL;

            break;

        }

        int32_t old = android_atomic_and(~CBLK_FUTEX_WAKE, &cblk->mFutex);

        if (!(old & CBLK_FUTEX_WAKE)) {

        // Check inactive to prevent waiting if the track has been disabled due to underrun

        // (or invalidated).  The subsequent call to obtainBufer will return NOT_ENOUGH_DATA

        // (or DEAD_OBJECT) and restart (or restore) the track.

        const int32_t current_flags = android_atomic_acquire_load(&cblk->mFlags);

        const bool inactive = current_flags & (CBLK_INVALID | CBLK_DISABLED);

        if (!(old & CBLK_FUTEX_WAKE) && !inactive) {

            if (measure && !beforeIsValid) {

                clock_gettime(CLOCK_MONOTONIC, &before);

                beforeIsValid = true;