Example usage for java.nio ShortBuffer allocate

Introduction

In this page you can find the example usage for java.nio ShortBuffer allocate.

Prototype

public static ShortBuffer allocate(int capacity)

Source Link

Document

Creates a short buffer based on a newly allocated short array.

Usage

From source file:net.dv8tion.jda.audio.AudioConnection.java

private byte[] encodeToOpus(byte[] rawAudio) {
    ShortBuffer nonEncodedBuffer = ShortBuffer.allocate(rawAudio.length / 2);
    ByteBuffer encoded = ByteBuffer.allocate(4096);
    for (int i = 0; i < rawAudio.length; i += 2) {
        int firstByte = (0x000000FF & rawAudio[i]); //Promotes to int and handles the fact that it was unsigned.
        int secondByte = (0x000000FF & rawAudio[i + 1]); //

        //Combines the 2 bytes into a short. Opus deals with unsigned shorts, not bytes.
        short toShort = (short) ((firstByte << 8) | secondByte);

        nonEncodedBuffer.put(toShort);/*ww  w. j  ava  2s  .co  m*/
    }
    nonEncodedBuffer.flip();

    //TODO: check for 0 / negative value for error.
    int result = Opus.INSTANCE.opus_encode(opusEncoder, nonEncodedBuffer, OPUS_FRAME_SIZE, encoded,
            encoded.capacity());

    //ENCODING STOPS HERE

    byte[] audio = new byte[result];
    encoded.get(audio);
    return audio;
}