我有一个AudioTrack的问题,这个Android API正在扼杀我.我来自没有以前的Android或Java经验,但我是一个非常有经验的编码器(asm,C++等在许多平台上),我从未想过我特别愚蠢,就像Android现在肯定让我感觉到的那样.
我究竟做错了什么？显然没有:
audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, sampleRate, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT, minbufsizbytes*64, AudioTrack.MODE_STATIC);
audioTrack.write(Buffer, 0, numSamples);
audioTrack.play();
实际上,sampleRate = 8000和minbufsizbytes = 742,其中(742*64 = 47488)比我正在写的缓冲区(16000个16位样本)大得多.
音频第一次播放就好了.但是......我如何不止一次地玩它？(例如,响应于事件,例如按下的钢琴键).如果我再次调用play(),则不会产生新的声音.经过几天的挫折之后,这就是我的想法:
for (i=0;;i++) {
SystemClock.sleep(3000L); // so the problem is NOT "fast, repeated attempts to replay sound", but looks like internal buffer overrun related (please see the Log'ed error below)
audioTrack.stop();
audioTrack.reloadStaticData();
audioTrack.setPlaybackHeadPosition(0);
audioTrack.play();
}
所以它第三次播放声音(!)然后没有音频!并且Log会被此错误消息淹没:
05-18 13:03:16.785: ERROR/AudioFlinger(345): TrackBase::getBuffer buffer out of range:
05-18 13:03:16.785: ERROR/AudioFlinger(345): start: 0x404fb680, end 0x404fb7f2 , mBuffer 0x40507000 mBufferEnd 0x40512980
05-18 …