JDA: Audio is not received unless audio is being sent

General Troubleshooting

• I have checked for similar issues.
• I have updated to the latest JDA version.
• I have checked the branches or the maintainers’ PRs for upcoming features/bug fixes.

Issue

Issue Type

• Bug Report
• Feature Request

Description

Until 9/27/18, AudioReceiveHandler#handleCombinedAudio has been receiving all audio from the connected voice channel. After that date, the function has been writing blank data to the recording file, with 0 changes from me.

AudioReceiveHandler:

//user, warned, updated, channel, and file are defined. close() returns a File object.
	@Override
	public void handleCombinedAudio(CombinedAudio arg0) {
		try {
			left = limit - used;
			if(updated && warned) {
				channel.sendMessage(user.getAsMention() + " Recording termination canceled, you deleted a recording.").queue();
				warned = false;
				updated = false;
			}
			if(left < 1024*1024*10 && !warned) {
				warned = true;
				channel.sendMessage(user.getAsMention() + " Warning, you have less than 10 MB of space left (roughly a minute of recording time). The recording will stop if you do not free up some space.").queue();
			}
			if(left <= 0) {
				closed = true;
				channel.sendMessage(user.getAsMention() + " You ran out of space! The recording has been stopped (Recording ID: " + close().getName() + ").\n"
						+ "Get more space by deleting some recordings or buying the Monthly Donor role. Details with the `donate` command.").queue();
				return;
			}
			byte[] bytes = arg0.getAudioData(1.0);
			if(!closed){
				zipStream.write(bytes);
				used += bytes.length;
			}
		} catch (IOException e) {
			e.printStackTrace();
			closed = true;
		}
	}

If I send this data back to Discord in my AudioSendHandler (which worked fine until the mentioned date), I can’t hear anything.

AudioSendHandler:

//channel and BUFFSIZE are defined. BUFFSIZE = 3840
	@Override
	public byte[] provide20MsAudio() {
		byte[] bytes = new byte[BUFFSIZE];
		try {
			int readBytes = stream.read(bytes, 0, BUFFSIZE);
			if(readBytes < 1) {
				closed = true;
				close();
				channel.sendMessage("Recording playback ended").queue();
				return bytes;
			}
                         //I'm reading from a FileInputStream from a zipped file. Occasionally, the unzipping process takes longer than 20ms. Better to block until we actually have data than sending what we have and facing the wrath of the opus decoder.
			while(readBytes < BUFFSIZE){
				readBytes += stream.read(bytes, readBytes, BUFFSIZE - readBytes);
			}
		}
		catch (IOException e) {
			//Oh well
		}
		catch(IndexOutOfBoundsException e){
			//Oh well #2
		}
		return bytes;
	}

This isn’t just my issue. I suspect Discord made a breaking change.