Android平台GB28181设备接入侧音频采集推送示例

**GB28181设备接入侧音频采集推送示例**

**前言**

GB28181是中国国家标准，用于公安、消防等行业的视频监控系统。该标准要求设备在接入侧进行音频采集和推送。在Android平台上实现GB28181设备接入侧音频采集推送功能需要遵循以下步骤。

**环境准备**

* Android Studio4.1或以上版本* Java SDK8或以上版本* GB28181设备接入侧音频采集和推送相关协议**示例代码**

### **GB28181Device.java**

java/**
 * GB28181设备接入侧音频采集和推送示例 */
public class GB28181Device {
 // 设备ID private String deviceId;
 // 设备类型 private String deviceType;
 // 音频采集和推送相关参数 private int audioSamplingRate =48000; // 采样率 private int audioBitDepth =16; // 位深度 private int audioChannels =2; // 声道数 public GB28181Device(String deviceId, String deviceType) {
 this.deviceId = deviceId;
 this.deviceType = deviceType;
 }

 /**
 * 开始音频采集和推送 */
 public void startAudioCaptureAndPush() {
 // 初始化音频采集和推送相关参数 AudioFormat audioFormat = new AudioFormat(audioSamplingRate, audioBitDepth, audioChannels);
 AudioTrack audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, audioSamplingRate, audioBitDepth, audioChannels,1024 *2, AudioTrack.MODE_STREAM);

 // 开始音频采集和推送 audioTrack.play();
 while (true) {
 // 获取音频数据 byte[] audioData = getAudioData();

 // 推送音频数据 pushAudioData(audioData);
 }
 }

 /**
 * 停止音频采集和推送 */
 public void stopAudioCaptureAndPush() {
 // 停止音频采集和推送 audioTrack.stop();
 audioTrack.release();
 }

 /**
 * 获取音频数据 *
 * @return 音频数据 */
 private byte[] getAudioData() {
 // TODO: 实现获取音频数据的逻辑 return null;
 }

 /**
 * 推送音频数据 *
 * @param audioData 音频数据 */
 private void pushAudioData(byte[] audioData) {
 // TODO: 实现推送音频数据的逻辑 }
}

java/**
 * GB28181设备接入侧音频采集和推送示例主活动 */
public class MainActivity extends AppCompatActivity {
 private GB28181Device gb28181Device;

 @Override protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);

 // 初始化GB28181设备 gb28181Device = new GB28181Device("device_id", "device_type");

 // 开始音频采集和推送 gb28181Device.startAudioCaptureAndPush();
 }

 @Override protected void onDestroy() {
 super.onDestroy();

 // 停止音频采集和推送 gb28181Device.stopAudioCaptureAndPush();
 }
}

java/**
 * 音频格式类 */
public class AudioFormat {
 private int samplingRate;
 private int bitDepth;
 private int channels;

 public AudioFormat(int samplingRate, int bitDepth, int channels) {
 this.samplingRate = samplingRate;
 this.bitDepth = bitDepth;
 this.channels = channels;
 }

 public int getSamplingRate() {
 return samplingRate;
 }

 public void setSamplingRate(int samplingRate) {
 this.samplingRate = samplingRate;
 }

 public int getBitDepth() {
 return bitDepth;
 }

 public void setBitDepth(int bitDepth) {
 this.bitDepth = bitDepth;
 }

 public int getChannels() {
 return channels;
 }

 public void setChannels(int channels) {
 this.channels = channels;
 }
}

java/**
 * 音频轨道类 */
public class AudioTrack {
 private int streamType;
 private int samplingRate;
 private int bitDepth;
 private int channels;
 private int bufferSize;
 private int mode;

 public AudioTrack(int streamType, int samplingRate, int bitDepth, int channels, int bufferSize, int mode) {
 this.streamType = streamType;
 this.samplingRate = samplingRate;
 this.bitDepth = bitDepth;
 this.channels = channels;
 this.bufferSize = bufferSize;
 this.mode = mode;
 }

 public int getStreamType() {
 return streamType;
 }

 public void setStreamType(int streamType) {
 this.streamType = streamType;
 }

 public int getSamplingRate() {
 return samplingRate;
 }

 public void setSamplingRate(int samplingRate) {
 this.samplingRate = samplingRate;
 }

 public int getBitDepth() {
 return bitDepth;
 }

 public void setBitDepth(int bitDepth) {
 this.bitDepth = bitDepth;
 }

 public int getChannels() {
 return channels;
 }

 public void setChannels(int channels) {
 this.channels = channels;
 }

 public int getBufferSize() {
 return bufferSize;
 }

 public void setBufferSize(int bufferSize) {
 this.bufferSize = bufferSize;
 }

 public int getMode() {
 return mode;
 }

 public void setMode(int mode) {
 this.mode = mode;
 }
}

java/**
 * 音频管理类 */
public class AudioManager {
 public static final int STREAM_MUSIC =3;

 private AudioManager() {}

 public static int getStreamType(String streamName) {
 // TODO: 实现获取音频流类型的逻辑 return STREAM_MUSIC;
 }
}

java/**
 * GB28181设备管理类 */
public class GB28181DeviceManager {
 private List devices;

 public GB28181DeviceManager() {
 this.devices = new ArrayList<>();
 }

 /**
 * 添加GB28181设备 *
 * @param device GB28181设备 */
 public void addDevice(GB28181Device device) {
 devices.add(device);
 }

 /**
 * 获取所有GB28181设备 *
 * @return 所有GB28181设备列表 */
 public List getDevices() {
 return devices;
 }
}

java/**
 * GB28181设备工厂类 */
public class GB28181DeviceFactory {
 private static Map> deviceClasses = new HashMap<>();

 public static void registerDeviceClass(String deviceId, Class deviceClass) {
 deviceClasses.put(deviceId, deviceClass);
 }

 public static GB28181Device createDevice(String deviceId) throws InstantiationException, IllegalAccessException {
 Class deviceClass = deviceClasses.get(deviceId);
 if (deviceClass == null) {
 throw new IllegalArgumentException("未注册的设备ID");
 }
 return (GB28181Device) deviceClass.newInstance();
 }
}

java/**
 * GB28181设备注册类 */
public class GB28181DeviceRegister {
 public static void register() {
 // 注册GB28181设备工厂类 GB28181DeviceFactory.registerDeviceClass("device_id", GB28181Device.class);
 }
}

java/**
 * GB28181设备接入侧音频采集和推送示例主活动 */
public class MainActivity extends AppCompatActivity {
 private GB28181Device gb28181Device;

 @Override protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);

 // 初始化GB28181设备工厂类 GB28181DeviceFactory.register();

 // 创建GB28181设备 try {
 gb28181Device = GB28181DeviceFactory.createDevice("device_id");
 } catch (InstantiationException | IllegalAccessException e) {
 Log.e("MainActivity", "创建GB28181设备失败", e);
 return;
 }

 // 开始音频采集和推送 gb28181Device.startAudioCaptureAndPush();
 }

 @Override protected void onDestroy() {
 super.onDestroy();

 // 停止音频采集和推送 gb28181Device.stopAudioCaptureAndPush();
 }
}

java/**
 * GB28181设备接入侧音频采集和推送类 */
public class GB28181Device {
 private AudioTrack audioTrack;

 public void startAudioCaptureAndPush() {