Android(安卓)Camera2 Mediacodec编码
16lz
2022-06-16
Camera2 TextureView 图像预览，ImageReader 拍照
MediaCodec 同步（线程方法 method2）/异步（回调 method1）视频编码、保存为.264文档
public class SurfaceTextureCamera2Activity extends Activity implements TextureView.SurfaceTextureListener, OnClickListener { HandlerThread mThreadHandler; Handler mHandler, mainHandler; TextureView mPreviewView; CameraCaptureSession mSession; CaptureRequest.Builder mPreviewBuilder; ImageView iv_show; CameraDevice mCameraDevice; ImageReader mImageReader; Surface mEncoderSurface; BufferedOutputStream outputStream; private MediaCodec mCodec, mDecodec; boolean isEncode = false; private String TAG = "SurfaceTextureCamera2Activity"; private static final SparseIntArray ORIENTATIONS = new SparseIntArray(); ///为了使照片竖直显示 static { ORIENTATIONS.append(Surface.ROTATION_0, 90); ORIENTATIONS.append(Surface.ROTATION_90, 0); ORIENTATIONS.append(Surface.ROTATION_180, 270); ORIENTATIONS.append(Surface.ROTATION_270, 180); } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main2); mThreadHandler = new HandlerThread("CAMERA2"); mThreadHandler.start(); mHandler = new Handler(mThreadHandler.getLooper()); mainHandler = new Handler(getMainLooper()); mPreviewView = (TextureView) findViewById(R.id.textureview); mPreviewView.setSurfaceTextureListener(this); Button btn = (Button) findViewById(R.id.takePhoto); btn.setOnClickListener(this); iv_show = (ImageView) findViewById(R.id.show_photo); mImageReader = ImageReader.newInstance(1080, 1920, ImageFormat.JPEG,1); mImageReader.setOnImageAvailableListener(new ImageReader.OnImageAvailableListener() { //可以在这里处理拍照得到的临时照片 例如，写入本地 @Override public void onImageAvailable(ImageReader reader) { Log.i(TAG, " onImageAvailable "); // mCameraDevice.close(); //mPreviewView.setVisibility(View.GONE); iv_show.setVisibility(View.VISIBLE); // 拿到拍照照片数据 Image image = reader.acquireNextImage(); ByteBuffer buffer = image.getPlanes()[0].getBuffer(); byte[] bytes = new byte[buffer.remaining()]; buffer.get(bytes);//由缓冲区存入字节数组 Bitmap bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.length); if (bitmap != null) { iv_show.setImageBitmap(bitmap); image.close(); } } }, mainHandler); } public void initDecoder() { try { //根据需要解码的类型创建解码器 mDecodec = MediaCodec.createDecoderByType(MediaFormat.MIMETYPE_VIDEO_AVC); } catch (IOException e) { e.printStackTrace(); } MediaFormat mediaFormat = MediaFormat.createVideoFormat(MediaFormat.MIMETYPE_VIDEO_AVC, mPreviewView.getWidth(), mPreviewView.getHeight()); //MediaFormat mediaFormat = MediaFormat.createVideoFormat(MediaFormat.MIMETYPE_VIDEO_AVC, width, height); //mediaFormat.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420Flexible); //TextureView SurfaceTexture texture = mPreviewView.getSurfaceTexture(); texture.setDefaultBufferSize(mPreviewView.getWidth(), mPreviewView.getHeight()); //texture.setOnFrameAvailableListener(this); Surface surface0 = new Surface(texture); mDecodec.configure(mediaFormat, surface0, null, 0); //直接解码送surface显示 // mCodec.setCallback(new DecoderCallback()); //开始解码 mDecodec.start(); } public void startCodec() { File f = new File(Environment.getExternalStorageDirectory(), "camera2mediacodec0.264"); if(!f.exists()){ try { f.createNewFile(); Log.e(TAG, " create a file "); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } }else{ if(f.delete()){ try { f.createNewFile(); Log.e(TAG, " delete and create a file "); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } try { outputStream = new BufferedOutputStream(new FileOutputStream(f)); Log.i("Encoder", "outputStream initialized"); } catch (Exception e){ e.printStackTrace(); } try { mCodec = MediaCodec.createEncoderByType(MediaFormat.MIMETYPE_VIDEO_AVC); } catch (IOException e) { e.printStackTrace(); } MediaFormat mediaFormat = MediaFormat.createVideoFormat(MediaFormat.MIMETYPE_VIDEO_AVC, mPreviewView.getWidth(), mPreviewView.getHeight()); mediaFormat.setInteger(MediaFormat.KEY_BIT_RATE, 500000);//500kbps mediaFormat.setInteger(MediaFormat.KEY_FRAME_RATE, 15); //ediaFormat.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420Flexible); mediaFormat.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface); //COLOR_FormatSurface //mediaFormat.setInteger(MediaFormat.KEY_COLOR_FORMAT, // MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420SemiPlanar); //COLOR_FormatYUV420Planar //mediaFormat.setInteger(MediaFormat.KEY_ROTATION, 90); mediaFormat.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 5); //锟截硷拷帧锟斤拷锟绞憋拷锟� 锟斤拷位s mCodec.configure(mediaFormat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE); mEncoderSurface = mCodec.createInputSurface(); //method 1 mCodec.setCallback(new EncoderCallback()); mCodec.start(); } public void stopCodec() { try { if(isEncode) { isEncode = false; }else { mCodec.stop(); mCodec.release(); mCodec = null; } } catch (Exception e) { e.printStackTrace(); mCodec = null; } } int mCount = 0; public void onFrameDecodec(byte[] buf, int offset, int length) { //-1表示一直等待；0表示不等待；其他大于0的参数表示等待毫秒数 int inputBufferIndex = mDecodec.dequeueInputBuffer(-1); if (inputBufferIndex >= 0) { ByteBuffer inputBuffer = mDecodec.getInputBuffer(inputBufferIndex); inputBuffer.clear(); inputBuffer.put(buf, offset, length); //解码 long timestamp = mCount * 1000000 / 25; mDecodec.queueInputBuffer(inputBufferIndex, 0, length, timestamp, 0); mCount++; } MediaCodec.BufferInfo bufferInfo = new MediaCodec.BufferInfo(); int outputBufferIndex = mDecodec.dequeueOutputBuffer(bufferInfo, 0); //10 //循环解码，直到数据全部解码完成 while (outputBufferIndex >= 0) { //logger.d("outputBufferIndex = " + outputBufferIndex); mDecodec.releaseOutputBuffer(outputBufferIndex, true); outputBufferIndex = mDecodec.dequeueOutputBuffer(bufferInfo, 0); } } public void onFrame(byte[] buf, int offset, int length) { //-1表示一直等待；0表示不等待；其他大于0的参数表示等待毫秒数 int inputBufferIndex = mCodec.dequeueInputBuffer(-1); if (inputBufferIndex >= 0) { ByteBuffer inputBuffer = mCodec.getInputBuffer(inputBufferIndex); inputBuffer.clear(); inputBuffer.put(buf, offset, length); mCodec.queueInputBuffer(inputBufferIndex, 0, length, 0, 0); } MediaCodec.BufferInfo bufferInfo = new MediaCodec.BufferInfo(); int outputBufferIndex = mCodec.dequeueOutputBuffer(bufferInfo, 0); //10 //循环解码，直到数据全部解码完成 while (outputBufferIndex >= 0) { //logger.d("outputBufferIndex = " + outputBufferIndex); ByteBuffer outputBuffer = mCodec.getOutputBuffer(outputBufferIndex); byte[] outData = new byte[bufferInfo.size]; outputBuffer.get(outData); try { outputStream.write(outData, 0, outData.length); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } mCodec.releaseOutputBuffer(outputBufferIndex, false); outputBufferIndex = mCodec.dequeueOutputBuffer(bufferInfo, 0); } } private class EncoderCallback extends MediaCodec.Callback{ @Override public void onInputBufferAvailable(MediaCodec codec, int index) { // } @Override public void onOutputBufferAvailable(MediaCodec codec, int index, MediaCodec.BufferInfo info) { //ByteBuffer encodedData = codec.getOutputBuffer(index); //encodedData.position(info.offset); //encodedData.limit(info.offset + info.size); //Log.d(TAG, "onOutputBufferAvailable, info.size: " + info.size); ByteBuffer outPutByteBuffer = mCodec.getOutputBuffer(index); byte[] outDate = new byte[info.size]; outPutByteBuffer.get(outDate); try { Log.d(TAG, " outDate.length : " + outDate.length); outputStream.write(outDate, 0, outDate.length); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } mCodec.releaseOutputBuffer(index, false); } @Override public void onError(MediaCodec codec, MediaCodec.CodecException e) { Log.d(TAG, "Error: " + e); } @Override public void onOutputFormatChanged(MediaCodec codec, MediaFormat format) { Log.d(TAG, "encoder output format changed: " + format); } } @SuppressWarnings("ResourceType") @Override public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) { CameraManager cameraManager = (CameraManager) getSystemService(CAMERA_SERVICE); try { Log.i(TAG, "onSurfaceTextureAvailable: width = " + width + ", height = " + height); String[] CameraIdList = cameraManager.getCameraIdList(); //获取可用相机设备列表 CameraCharacteristics characteristics = cameraManager.getCameraCharacteristics(CameraIdList[0]); //在这里可以通过CameraCharacteristics设置相机的功能,当然必须检查是否支持 characteristics.get(CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL); //就像这样 if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) { return; } startCodec(); cameraManager.openCamera(CameraIdList[0], mCameraDeviceStateCallback, mHandler); } catch (CameraAccessException e) { e.printStackTrace(); } } @Override public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {} @Override public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) { stopCodec(); return false; } @Override public void onSurfaceTextureUpdated(SurfaceTexture surface) {} private CameraDevice.StateCallback mCameraDeviceStateCallback = new CameraDevice.StateCallback() { @Override public void onOpened(CameraDevice camera) { try { Log.i(TAG, " CameraDevice.StateCallback onOpened "); mCameraDevice = camera; startPreview(camera); } catch (CameraAccessException e) { e.printStackTrace(); } } @Override public void onDisconnected(CameraDevice camera) { if (null != mCameraDevice) { mCameraDevice.close(); SurfaceTextureCamera2Activity.this.mCameraDevice = null; } } @Override public void onError(CameraDevice camera, int error) {} }; private void startPreview(CameraDevice camera) throws CameraAccessException { SurfaceTexture texture = mPreviewView.getSurfaceTexture(); texture.setDefaultBufferSize(mPreviewView.getWidth(), mPreviewView.getHeight()); Surface surface = new Surface(texture); Log.i(TAG, " startPreview "); try { mPreviewBuilder = camera.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW); //CameraDevice.TEMPLATE_STILL_CAPTURE } catch (CameraAccessException e) { e.printStackTrace(); } mPreviewBuilder.addTarget(surface); mPreviewBuilder.addTarget(mEncoderSurface); /* //method 2 isEncode = true; new Thread() { public void run() { MediaCodec.BufferInfo m_BufferInfo = new MediaCodec.BufferInfo(); //尝试获取输出数据的信息，关于bytebuffer的信息将封装在bufferinfo里面，返回该bytebuffer在队列中的位置 int index = mCodec.dequeueOutputBuffer(m_BufferInfo, 0); while(isEncode) { if (index >= 0) { ByteBuffer outPutByteBuffer = mCodec.getOutputBuffer(index); byte[] outDate = new byte[m_BufferInfo.size]; outPutByteBuffer.get(outDate); try { Log.d(TAG, " outDate.length : " + outDate.length); outputStream.write(outDate, 0, outDate.length); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } //释放刚刚从Codec取出数据的bytebuffer，供Codec继续放数据。 mCodec.releaseOutputBuffer(index, false); //再尝试从Codec中获取输出数据的信息 index = mCodec.dequeueOutputBuffer(m_BufferInfo, 0); }else{ index = mCodec.dequeueOutputBuffer(m_BufferInfo, 0); continue; } } mCodec.stop(); mCodec.release(); mCodec = null; } }.start(); */ camera.createCaptureSession(Arrays.asList(surface, mEncoderSurface, mImageReader.getSurface()), mSessionStateCallback, mHandler); } private CameraCaptureSession.StateCallback mSessionStateCallback = new CameraCaptureSession.StateCallback() { @Override public void onConfigured(CameraCaptureSession session) { try { Log.i(TAG, " onConfigured "); //session.capture(mPreviewBuilder.build(), mSessionCaptureCallback, mHandler); mSession = session; // 自动对焦 mPreviewBuilder.set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE); // 打开闪光灯 mPreviewBuilder.set(CaptureRequest.CONTROL_AE_MODE, CaptureRequest.CONTROL_AE_MODE_ON_AUTO_FLASH); int rotation = getWindowManager().getDefaultDisplay().getRotation(); mPreviewBuilder.set(CaptureRequest.JPEG_ORIENTATION, ORIENTATIONS.get(rotation)); session.setRepeatingRequest(mPreviewBuilder.build(), null, mHandler); //null } catch (CameraAccessException e) { e.printStackTrace(); } } @Override public void onConfigureFailed(CameraCaptureSession session) {} }; int callback_time; private CameraCaptureSession.CaptureCallback mSessionCaptureCallback =new CameraCaptureSession.CaptureCallback() { @Override public void onCaptureCompleted(CameraCaptureSession session, CaptureRequest request, TotalCaptureResult result) { //Toast.makeText(SurfaceTextureCamera2Activity.this, "picture success！", Toast.LENGTH_SHORT).show(); callback_time++; Log.i(TAG, " CaptureCallback = "+callback_time); } @Override public void onCaptureProgressed(CameraCaptureSession session, CaptureRequest request, CaptureResult partialResult) { Toast.makeText(SurfaceTextureCamera2Activity.this, "picture failed！", Toast.LENGTH_SHORT).show(); } }; private CameraCaptureSession.CaptureCallback mSessionCaptureCallback0 =new CameraCaptureSession.CaptureCallback() { @Override public void onCaptureCompleted(CameraCaptureSession session, CaptureRequest request, TotalCaptureResult result) { Toast.makeText(SurfaceTextureCamera2Activity.this, "take picture success！", Toast.LENGTH_SHORT).show(); } @Override public void onCaptureProgressed(CameraCaptureSession session, CaptureRequest request, CaptureResult partialResult) { Toast.makeText(SurfaceTextureCamera2Activity.this, "take picture failed！", Toast.LENGTH_SHORT).show(); } }; @Override public void onClick(View v) { // TODO Auto-generated method stub takePicture(); /* try { mSession.capture(mPreviewBuilder.build(), mSessionCaptureCallback0, mHandler); //mSession.setRepeatingRequest(mPreviewBuilder.build(), mSessionCaptureCallback, mHandler); } catch (CameraAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); } */ //session.capture(mPreviewBuilder.build(), mSessionCaptureCallback, mHandler);就可以了 } private void takePicture() { if (mCameraDevice == null) return; // 创建拍照需要的CaptureRequest.Builder final CaptureRequest.Builder captureRequestBuilder; try { captureRequestBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE); // 将imageReader的surface作为CaptureRequest.Builder的目标 captureRequestBuilder.addTarget(mImageReader.getSurface()); // 自动对焦 captureRequestBuilder.set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE); // 自动曝光 captureRequestBuilder.set(CaptureRequest.CONTROL_AE_MODE, CaptureRequest.CONTROL_AE_MODE_ON_AUTO_FLASH); // 获取手机方向 int rotation = getWindowManager().getDefaultDisplay().getRotation(); // 根据设备方向计算设置照片的方向 captureRequestBuilder.set(CaptureRequest.JPEG_ORIENTATION, ORIENTATIONS.get(rotation)); //拍照 CaptureRequest mCaptureRequest = captureRequestBuilder.build(); mSession.capture(mCaptureRequest, mSessionCaptureCallback0, mHandler); } catch (CameraAccessException e) { e.printStackTrace(); } } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK) { if (!mPreviewView.isShown()) { mPreviewView.setVisibility(View.VISIBLE); iv_show.setVisibility(View.GONE); return true; } if(iv_show.isShown()) { iv_show.setVisibility(View.GONE); return true; } } return super.onKeyDown(keyCode, event); }}布局文档activity_main2.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" > <TextureView android:id="@+id/textureview" android:layout_width="960px" android:layout_height="720px" android:layout_centerInParent="true" /> <ImageView android:id="@+id/show_photo" android:layout_width="180dp" android:layout_height="320dp" android:visibility="gone" android:layout_centerInParent="true" android:scaleType="centerCrop" /> <Button android:id="@+id/takePhoto" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@drawable/btn_camera_all_click" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" android:layout_marginBottom="10dip"/>RelativeLayout>预览效果图：
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