com.badlogic.gdx.backends.lwjgl3.audio.Ogg Maven / Gradle / Ivy

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/*******************************************************************************
 * Copyright 2011 See AUTHORS file.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/

package com.badlogic.gdx.backends.lwjgl3.audio;

import com.badlogic.gdx.files.FileHandle;
import com.badlogic.gdx.utils.BufferUtils;
import com.badlogic.gdx.utils.GdxRuntimeException;
import com.badlogic.gdx.utils.StreamUtils;
import org.lwjgl.stb.STBVorbis;
import org.lwjgl.system.MemoryStack;

import java.nio.ByteBuffer;
import java.nio.IntBuffer;
import java.nio.ShortBuffer;

/** @author Nathan Sweet */
public class Ogg {
	static public class Music extends OpenALMusic {
		private OggInputStream input;
		private OggInputStream previousInput;

		public Music (OpenALLwjgl3Audio audio, FileHandle file) {
			super(audio, file);
			if (audio.noDevice) return;
			input = new OggInputStream(file.read());
			setup(input.getChannels(), 16, input.getSampleRate());
		}

		public int read (byte[] buffer) {
			if (input == null) {
				input = new OggInputStream(file.read(), previousInput);
				setup(input.getChannels(), 16, input.getSampleRate());
				previousInput = null; // release this reference
			}
			return input.read(buffer);
		}

		public void reset () {
			StreamUtils.closeQuietly(input);
			previousInput = null;
			input = null;
		}

		@Override
		protected void loop () {
			StreamUtils.closeQuietly(input);
			previousInput = input;
			input = null;
		}
	}

	static public class Sound extends OpenALSound {
		public Sound (OpenALLwjgl3Audio audio, FileHandle file) {
			super(audio);
			if (audio.noDevice) return;

			// put the encoded audio data in a ByteBuffer
			byte[] streamData = file.readBytes();
			ByteBuffer encodedData = BufferUtils.newByteBuffer(streamData.length);
			encodedData.put(streamData);
			encodedData.flip();

			try (MemoryStack stack = MemoryStack.stackPush()) {
				final IntBuffer channelsBuffer = stack.mallocInt(1);
				final IntBuffer sampleRateBuffer = stack.mallocInt(1);

				// decode
				final ShortBuffer decodedData = STBVorbis.stb_vorbis_decode_memory(encodedData, channelsBuffer, sampleRateBuffer);
				int channels = channelsBuffer.get(0);
				int sampleRate = sampleRateBuffer.get(0);
				if (decodedData == null) {
					throw new GdxRuntimeException("Error decoding OGG file: " + file);
				}

				setup(decodedData, channels, 16, sampleRate);
			}
		}
	}
}