mediaserver 异常挂掉引起的一个BUG

mediaserver 异常挂掉引起的一个BUG

具体问题:
由于CAMERA的问题,导致Mediaservice 挂掉,audioflinger, audiopolicyservice 也一起被杀掉了。KERNEL HIFI并没有关掉。

处理方法:
AudioService 中有注册audioflinger, audiopolicyservice DIE 掉的回调函数,
具体就是这个

private final AudioSystem.ErrorCallback mAudioSystemCallback = new AudioSystem.ErrorCallback() {
    public void onError(int error) {
        switch (error) {
        case AudioSystem.AUDIO_STATUS_SERVER_DIED:
            sendMsg(mAudioHandler, MSG_MEDIA_SERVER_DIED,
                    SENDMSG_NOOP, 0, 0, null, 0);
            break;
        default:
            break;
        }
    }
};

在 AudioHandler 处理中,

case MSG_MEDIA_SERVER_DIED:
                if (AudioSystem.checkAudioFlinger() != AudioSystem.AUDIO_STATUS_OK) {
                    Log.e(TAG, "Media server died.");
                    sendMsg(mAudioHandler, MSG_MEDIA_SERVER_DIED, SENDMSG_NOOP, 0, 0,
                            null, 500);
                    break;
                }
                Log.e(TAG, "Media server started.");

                // indicate to audio HAL that we start the reconfiguration phase after a media
                // server crash
                // Note that we only execute this when the media server
                // process restarts after a crash, not the first time it is started.
                AudioSystem.setParameters("restarting=true");

                readAndSetLowRamDevice();

首先是每隔500 MS 查询一次SERVICE是否已经重启OK了,如果OK了重新将上面的状态设置到底层去。在这个地方重新设置下HIFI 状态就OK 了。

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