PCMtoPCMCodec.java 文件源码

@Override
public AudioFormat.Encoding[] getTargetEncodings(AudioFormat sourceFormat) {

    final int sampleSize = sourceFormat.getSampleSizeInBits();
    AudioFormat.Encoding encoding = sourceFormat.getEncoding();
    if (sampleSize == 8) {
        if (encoding.equals(AudioFormat.Encoding.PCM_SIGNED)) {
            return new AudioFormat.Encoding[]{
                    AudioFormat.Encoding.PCM_UNSIGNED
            };
        }
        if (encoding.equals(AudioFormat.Encoding.PCM_UNSIGNED)) {
            return new AudioFormat.Encoding[]{
                    AudioFormat.Encoding.PCM_SIGNED
            };
        }
    } else if (sampleSize == 16) {
        if (encoding.equals(AudioFormat.Encoding.PCM_SIGNED)
                || encoding.equals(AudioFormat.Encoding.PCM_UNSIGNED)) {
            return new AudioFormat.Encoding[]{
                    AudioFormat.Encoding.PCM_UNSIGNED,
                    AudioFormat.Encoding.PCM_SIGNED
            };
        }
    }
    return new AudioFormat.Encoding[0];
}