我需要能够使用 Android 中的麦克风创建 WAV 文件。目前,我遇到了很多麻烦。到目前为止,这就是我的情况。我正在使用 micDroid 项目代码的一部分来记录:
//read thread
int sampleRate = 44100;
int bufferSize = AudioRecord.getMinBufferSize(sampleRate,android.media.AudioFormat.CHANNEL_CONFIGURATION_MONO,android.media.AudioFormat.ENCODING_PCM_16BIT);
AudioRecord ar = new AudioRecord(AudioSource.MIC,sampleRate,android.media.AudioFormat.CHANNEL_CONFIGURATION_MONO,android.media.AudioFormat.ENCODING_PCM_16BIT,bufferSize);
short[] buffer = new short[bufferSize];
ar.startRecording();
while(isRunning){
try{
int numSamples = ar.read(buffer, 0, buffer.length);
queue.put(new Sample(buffer, numSamples));
} catch (InterruptedException e){
e.printStackTrace();
}
}
//write thread
int sampleRate = 44100;
WaveWriter writer = new WaveWriter("/sdcard","recOut.wav",sampleRate,android.media.AudioFormat.CHANNEL_CONFIGURATION_MONO,android.media.AudioFormat.ENCODING_PCM_16BIT);
try {
writer.createWaveFile();
} catch (IOException e) {
e.printStackTrace();
}
while(isRunning){
try {
Sample sample = queue.take();
writer.write(sample.buffer, sample.bufferSize);
} catch (IOException e) {
//snip
}
}
这看起来工作正常,但最终结果明显包含我所说的内容,但它被严重扭曲了。这是一个大胆的屏幕截图(WMP 拒绝播放该文件)。
任何帮助将不胜感激,如果您需要更多代码/信息,请告诉我。
Update
根据马库斯的建议,这是我更新的代码:
int sampleRate = 16000;
writer = new WaveWriter("/sdcard","recOut.wav",sampleRate,android.media.AudioFormat.CHANNEL_IN_MONO,android.media.AudioFormat.ENCODING_PCM_16BIT);
int bufferSize = AudioRecord.getMinBufferSize(sampleRate,android.media.AudioFormat.CHANNEL_IN_MONO,android.media.AudioFormat.ENCODING_PCM_16BIT);
AudioRecord ar = new AudioRecord(AudioSource.MIC,sampleRate,android.media.AudioFormat.CHANNEL_IN_MONO,android.media.AudioFormat.ENCODING_PCM_16BIT,bufferSize);
byte[] buffer = new byte[bufferSize]; //all references changed from short to byte type
...and another audacity screencap:
![alt text](https://i.stack.imgur.com/YVJNT.png)