我有一个立体声 AudioInputStream
我想把它分成两个单体。AudioInputStream
一个用于左声道,一个用于右声道的立体声流。我怎么做呢?
注意:我已经测试了以下问题的答案,但没有任何效果(这就是为什么我再次询问的原因)。 我已经测试了下面问题的答案,但没有任何工作对我来说(这就是为什么我再次问)。
这是我想让它工作的方法(主要是来自上面的链接)。在下面的代码中,while循环无限运行。readsize
始终是4(或其他什么 sampleInBytes * 2
是),它永远不会变成-1(这意味着它是流的终点),所以它永远不会断。
AudioInputStream originalAudioInputStream = null;
try {
originalAudioInputStream = AudioSystem.getAudioInputStream(audiofile);
} catch (UnsupportedAudioFileException e) {
//file not supported
} catch (IOException e) {
//error
}
//read file and convert it to PCM SIGNED big endian
AudioFormat destaf = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED,
originalAudioInputStream.getFormat().getSampleRate(),
originalAudioInputStream.getFormat().getSampleSizeInBits(),
originalAudioInputStream.getFormat().getChannels(),
originalAudioInputStream.getFormat().getSampleSizeInBits() / 8 * originalAudioInputStream.getFormat().getChannels(),
originalAudioInputStream.getFormat().getSampleRate(), true);
AudioInputStream signedBigEndianInputStream = AudioSystem.getAudioInputStream(destaf, originalAudioInputStream);
//split stereo AudioInputStream
ByteArrayOutputStream leftbaos = new ByteArrayOutputStream();
ByteArrayOutputStream rightbaos = new ByteArrayOutputStream();
byte[] bytes = new byte[(signedBigEndianInputStream.getFormat().getSampleSizeInBits()/8)*2];
while (true) {
int readsize = 0;
try {
readsize = signedBigEndianInputStream.read(bytes);
} catch (IOException e) {
e.printStackTrace();
}
if(readsize==-1){
break;
}
rightbaos.write(bytes,0,bytes.length/2);
leftbaos.write(bytes,bytes.length/2,bytes.length/2);
}
byte[] leftData = leftbaos.toByteArray();
byte[] rightData = rightbaos.toByteArray();
AudioFormat outFormat = new AudioFormat(signedBigEndianInputStream.getFormat().getEncoding(),signedBigEndianInputStream.getFormat().getSampleRate(),signedBigEndianInputStream.getFormat().getSampleSizeInBits(),1,signedBigEndianInputStream.getFormat().getFrameSize()/2, signedBigEndianInputStream.getFormat().getFrameRate(),signedBigEndianInputStream.getFormat().isBigEndian());
ByteArrayInputStream leftbais = new ByteArrayInputStream(leftData);
AudioInputStream leftoutputAIS = new AudioInputStream(leftbais, outFormat, leftData.length / outFormat.getFrameSize());
ByteArrayInputStream rightbais = new ByteArrayInputStream(rightData);
AudioInputStream rightoutputAIS = new AudioInputStream(rightbais, outFormat, rightData.length / outFormat.getFrameSize());
//close inputstreams
try {
rightoutputAIS.close();
leftoutputAIS.close();
rightbais.close();
leftbais.close();
rightbaos.close();
leftbaos.close();
signedBigEndianInputStream.close();
originalAudioInputStream.close();
} catch (IOException e) {
//error
}
谢谢!我有一个立体声音频输入流,我想把它分成两个单声道的音频输入流。
你假设音频被存储在两个块中。
相反,音频通常存储在一个 交错式.
就是说:
为了分离两个流,你必须做这样的事情。
[...]
final int bytesPerSample = destaf.getSampleSizeInBits() / 8;
final int channels = 2;
while (true) {
int readsize = 0;
try {
readsize = signedBigEndianInputStream.read(bytes);
} catch (IOException e) {
e.printStackTrace();
}
if (readsize==-1){
break;
}
for (int sample=0; sample<readsize/channels/bytesPerSample;sample++) {
final int offset = sample * bytesPerSample * channels;
leftbaos.write(bytes, offset, bytesPerSample);
rightbaos.write(bytes, offset + bytesPerSample, bytesPerSample);
}
}
[...]