cocoa - 如何检查 AudioQueue 中的当前时间和持续时间

Question

如何获取audioQueue中音乐的总持续时间。我正在使用

NSTimeInterval AQPlayer::getCurrentTime()
{
    NSTimeInterval timeInterval = 0.0;

    AudioQueueTimelineRef timeLine;
    OSStatus status = AudioQueueCreateTimeline(mQueue, &timeLine);
    if(status == noErr)
    {
        AudioTimeStamp timeStamp;
        AudioQueueGetCurrentTime(mQueue, timeLine, &timeStamp, NULL);
        timeInterval = timeStamp.mSampleTime;
    }

    return timeInterval;
}

AudioQueueGetCurrentTime(mQueue, timeLine, &timeStamp, NULL);为了获取当前播放时间，它给出了一些大值是否有效以及如何获取音乐文件的持续时间。

Answer 1

为了将来的引用，我通过对 Chandan 代码的轻微修改得到了以秒为单位的正确时间:

int AQPlayer::GetCurrentTime() {
    int timeInterval = 0;
    AudioQueueTimelineRef timeLine;
    OSStatus status = AudioQueueCreateTimeline(mQueue, &timeLine);
    if(status == noErr) {
        AudioTimeStamp timeStamp;
        AudioQueueGetCurrentTime(mQueue, timeLine, &timeStamp, NULL);
        timeInterval = timeStamp.mSampleTime / mDataFormat.mSampleRate; // modified
    }
    return timeInterval;
}