byte array to short array and back again in java

Question

I'm having some issues taking audio data stored in a byte array, converting it to a big-endian short array, encoding it, then changing it back into a byte array. Here is what I have. The original audio data is stored in audioBytes2. I am using the same format for decode with a minus on the cos function instead. Unfortunately, changing the byte and short data types is non-negotiable.

    short[] audioData = null;     int nlengthInSamples = audioBytes2.length / 2;     audioData = new short[nlengthInSamples];      for (int i = 0; i < nlengthInSamples; i++) {        short MSB = (short) audioBytes2[2*i+1];        short LSB = (short) audioBytes2[2*i];        audioData[i] = (short) (MSB << 8 | (255 & LSB));     }      int i = 0;     while (i < audioData.length) {         audioData[i] = (short)(audioData[i] + (short)5*Math.cos(2*Math.PI*i/(((Number)EncodeBox.getValue()).intValue())));         i++;     }      short x = 0;     i = 0;     while (i < audioData.length) {         x = audioData[i];         audioBytes2[2*i+1] = (byte)(x >>> 0);         audioBytes2[2*i] = (byte)(x >>> 8);         i++;     } 

I have done everything that I can think of to make this work, but the closest I've come is getting it to work every other encode/decode and I have no idea why. Thanks for any help.

Answer 1

I also suggest you try ByteBuffer.

byte[] bytes = {}; short[] shorts = new short[bytes.length/2]; // to turn bytes to shorts as either big endian or little endian.  ByteBuffer.wrap(bytes).order(ByteOrder.LITTLE_ENDIAN).asShortBuffer().get(shorts);  // to turn shorts back to bytes. byte[] bytes2 = new byte[shortsA.length * 2]; ByteBuffer.wrap(bytes2).order(ByteOrder.LITTLE_ENDIAN).asShortBuffer().put(shortsA);