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/*
* Copyright 2015 Alibaba Group Holding Limited
*
* 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.alibaba.nls.client.util;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Arrays;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* opu编解码器
*
* @author zhishen.ml
* @Date 2018/12/7.
*/
public class OpuCodec {
public static final int RAW_BUF_SIZE = 640;
public static final int OPU_BUF_SIZE = 512;
public interface EncodeListener {
void onEncodedData(byte[] data);
}
static Logger logger = LoggerFactory.getLogger(OpuCodec.class);
static {
try {
NativeLibUtil.loadFromJar("nlsJniOpu");
} catch (Exception e1) {
logger.warn("error to load nlsJniOpu :{}", e1.getMessage());
}
}
public native long createOpuEncoder(int sampleRate);
public native int encode(long encoder, byte[] frameBuff, int frameLen, byte[] outputBuffer, int outputLen);
public native void destroyOpuEncoder(long handle);
public void encode(int sampleRate, InputStream ins, OutputStream outs) throws Exception {
long encoder = createOpuEncoder(sampleRate);
try {
byte[] buffer = new byte[RAW_BUF_SIZE];
byte[] bytes = new byte[512];
while (ins.available() >= RAW_BUF_SIZE) {
ins.read(buffer, 0, RAW_BUF_SIZE);
//exg: the pcm data must be 640 byte
int encodeSize = encode(encoder, buffer, RAW_BUF_SIZE, bytes, OPU_BUF_SIZE);
outs.write(bytes, 0, encodeSize);
}
int remainSize = ins.read(buffer, 0, RAW_BUF_SIZE);
//填充
if (remainSize > 0) {
Arrays.fill(buffer, remainSize - 1, RAW_BUF_SIZE, (byte)0);
int encodeSize = encode(encoder, buffer, RAW_BUF_SIZE, bytes, OPU_BUF_SIZE);
outs.write(bytes, 0, encodeSize);
}
ins.close();
outs.close();
} catch (Exception e) {
logger.error("encode error", e);
throw e;
} finally {
destroyOpuEncoder(encoder);
}
}
public void encode(int sampleRate, InputStream ins, EncodeListener listener) throws Exception {
long encoder = createOpuEncoder(sampleRate);
try {
byte[] buffer = new byte[RAW_BUF_SIZE];
byte[] bytes = new byte[512];
while (ins.available() >= RAW_BUF_SIZE) {
ins.read(buffer, 0, RAW_BUF_SIZE);
//exg: the pcm data must be 640 byte
int encodeSize = encode(encoder, buffer, RAW_BUF_SIZE, bytes, OPU_BUF_SIZE);
listener.onEncodedData(Arrays.copyOfRange(bytes, 0, encodeSize));
}
int remainSize = ins.read(buffer, 0, RAW_BUF_SIZE);
//填充
if (remainSize > 0) {
Arrays.fill(buffer, remainSize - 1, RAW_BUF_SIZE, (byte)0);
int encodeSize = encode(encoder, buffer, RAW_BUF_SIZE, bytes, OPU_BUF_SIZE);
listener.onEncodedData(Arrays.copyOfRange(bytes, 0, encodeSize));
}
ins.close();
} catch (Exception e) {
logger.error("encode error", e);
throw e;
} finally {
destroyOpuEncoder(encoder);
}
}
}
