今天剛好是2016-09-30,假期前最后一天，上班提不起多大的精神，不想起馬上可以回家可以好好休息七天了，心里還是挺激動的。趁現(xiàn)在有點(diǎn)時(shí)間，想把最近整理出來的一個(gè)小demo分享出來，主要是通過Camera預(yù)覽功能采集數(shù)據(jù)，然后通過opengl進(jìn)行渲染，最后保存至Mp4文件中。主要用了四個(gè)類實(shí)現(xiàn)此功能:SurfaceTextureRender、SurfaceTextureWrapper、WindowInputSurface、EncodeManager,下面分別會對這個(gè)類進(jìn)行詳細(xì)的講解。
1、SurfaceTextureRender，主要是自定義渲染render，源碼如下:
/
*
* Created by jsp on 2016/9/29.
*/
public classSurfaceTextureRender {
private static finalStringTAG="SurfaceTextureRender";
private static final intFLOAT_SIZE_BYTES=4;
private static final intTRIANGLE_VERTICES_DATA_STRIDE_BYTES=5*FLOAT_SIZE_BYTES;
private static final intTRIANGLE_VERTICES_DATA_POS_OFFSET=0;
private static final intTRIANGLE_VERTICES_DATA_UV_OFFSET=3;
private final float[]mTriangleVerticesData= {
// X, Y, Z, U, V
-1.0f,-1.0f,0,0.f,0.f,
1.0f,-1.0f,0,1.f,0.f,
-1.0f,1.0f,0,0.f,1.f,
1.0f,1.0f,0,1.f,1.f,
};
privateFloatBuffermTriangleVertices;
private static finalStringVERTEX_SHADER=
"uniform mat4 uMVPMatrix;\n"+
"uniform mat4 uSTMatrix;\n"+
"attribute vec4 aPosition;\n"+
"attribute vec4 aTextureCoord;\n"+
"varying vec2 vTextureCoord;\n"+
"void main() {\n"+
" gl_Position = uMVPMatrix * aPosition;\n"+
" vTextureCoord = (uSTMatrix * aTextureCoord).xy;\n"+
"}\n";
//fragment shader
private static finalStringFRAGMENT_SHADER=
"#extension GL_OES_EGL_image_external : require\n"+
"precision mediump float;\n"+// highp here doesn't seem to matter
"varying vec2 vTextureCoord;\n"+
"uniform samplerExternalOES sTexture;\n"+
"void main() {\n"+
" gl_FragColor = texture2D(sTexture, vTextureCoord);\n"+
"}\n";
//交換改變fragment shader
public static finalStringSWAPPED_FRAGMENT_SHADER=
"#extension GL_OES_EGL_image_external : require\n"+
"precision mediump float;\n"+
"varying vec2 vTextureCoord;\n"+
"uniform samplerExternalOES sTexture;\n"+
"void main() {\n"+
" gl_FragColor = texture2D(sTexture, vTextureCoord).gbra;\n"+
"}\n";
private float[]mMVPMatrix=new float[16];
private float[]mSTMatrix=new float[16];
private intmProgram;
private intmTextureID= -12345;
private intmuMVPMatrixHandle;
private intmuSTMatrixHandle;
private intmaPositionHandle;
private intmaTextureHandle;
publicSurfaceTextureRender() {
mTriangleVertices= ByteBuffer.allocateDirect(
mTriangleVerticesData.length*FLOAT_SIZE_BYTES)
.order(ByteOrder.nativeOrder()).asFloatBuffer();
mTriangleVertices.put(mTriangleVerticesData).position(0);
Matrix.setIdentityM(mSTMatrix,0);
}
/**
*返回紋理id
*@return
*/
public final intgetTextureId() {
returnmTextureID;
}
/**
*開始渲染
*@paramst
*/
public final void drawFrame(SurfaceTexture st) {
checkGlError("onDrawFrame start");
st.getTransformMatrix(mSTMatrix);
// (optional) clear to green so we can see if we're failing to set pixels
GLES20.glClearColor(0.0f,1.0f,0.0f,1.0f);
GLES20.glClear(GLES20.GL_DEPTH_BUFFER_BIT| GLES20.GL_COLOR_BUFFER_BIT);
GLES20.glUseProgram(mProgram);
checkGlError("glUseProgram");
GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES,mTextureID);
mTriangleVertices.position(TRIANGLE_VERTICES_DATA_POS_OFFSET);
GLES20.glVertexAttribPointer(maPositionHandle,3,GLES20.GL_FLOAT, false,
TRIANGLE_VERTICES_DATA_STRIDE_BYTES,mTriangleVertices);
checkGlError("glVertexAttribPointer maPosition");
GLES20.glEnableVertexAttribArray(maPositionHandle);
checkGlError("glEnableVertexAttribArray maPositionHandle");
mTriangleVertices.position(TRIANGLE_VERTICES_DATA_UV_OFFSET);
GLES20.glVertexAttribPointer(maTextureHandle,2,GLES20.GL_FLOAT, false,
TRIANGLE_VERTICES_DATA_STRIDE_BYTES,mTriangleVertices);
checkGlError("glVertexAttribPointer maTextureHandle");
GLES20.glEnableVertexAttribArray(maTextureHandle);
checkGlError("glEnableVertexAttribArray maTextureHandle");
Matrix.setIdentityM(mMVPMatrix,0);
GLES20.glUniformMatrix4fv(muMVPMatrixHandle,1, false,mMVPMatrix,0);
GLES20.glUniformMatrix4fv(muSTMatrixHandle,1, false,mSTMatrix,0);
GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP,0,4);
checkGlError("glDrawArrays");
// IMPORTANT: on some devices, if you are sharing the external texture between two
// contexts, one context may not see updates to the texture unless you un-bind and
// re-bind it. If you're not using shared EGL contexts, you don't need to bind
// texture 0 here.
GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES,0);
}
/**
*初始化gl資源
*/
public final voidsurfaceCreated() {
mProgram= createProgram(VERTEX_SHADER,FRAGMENT_SHADER);
if(mProgram==0) {
throw newRuntimeException("failed creating program");
}
maPositionHandle= GLES20.glGetAttribLocation(mProgram,"aPosition");
checkLocation(maPositionHandle,"aPosition");
maTextureHandle= GLES20.glGetAttribLocation(mProgram,"aTextureCoord");
checkLocation(maTextureHandle,"aTextureCoord");
muMVPMatrixHandle= GLES20.glGetUniformLocation(mProgram,"uMVPMatrix");
checkLocation(muMVPMatrixHandle,"uMVPMatrix");
muSTMatrixHandle= GLES20.glGetUniformLocation(mProgram,"uSTMatrix");
checkLocation(muSTMatrixHandle,"uSTMatrix");
int[] textures =new int[1];
GLES20.glGenTextures(1,textures,0);
mTextureID= textures[0];
GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES,mTextureID);
checkGlError("glBindTexture mTextureID");
GLES20.glTexParameterf(GLES11Ext.GL_TEXTURE_EXTERNAL_OES,GLES20.GL_TEXTURE_MIN_FILTER,
GLES20.GL_NEAREST);
GLES20.glTexParameterf(GLES11Ext.GL_TEXTURE_EXTERNAL_OES,GLES20.GL_TEXTURE_MAG_FILTER,
GLES20.GL_LINEAR);
GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES,GLES20.GL_TEXTURE_WRAP_S,
GLES20.GL_CLAMP_TO_EDGE);
GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES,GLES20.GL_TEXTURE_WRAP_T,
GLES20.GL_CLAMP_TO_EDGE);
checkGlError("glTexParameter");
}
/**
*重新修改Fragment Shader
*@paramfragmentShader
*/
public final voidchangeFragmentShader(String fragmentShader) {
if(fragmentShader ==null) {
fragmentShader =FRAGMENT_SHADER;
}
GLES20.glDeleteProgram(mProgram);
mProgram= createProgram(VERTEX_SHADER,fragmentShader);
if(mProgram==0) {
throw newRuntimeException("failed creating program");
}
}
/**
*設(shè)置shader
*@paramshaderType
*@paramsource
*@return
*/
private intloadShader(intshaderType,String source) {
intshader = GLES20.glCreateShader(shaderType);
checkGlError("glCreateShader type="+ shaderType);
GLES20.glShaderSource(shader,source);
GLES20.glCompileShader(shader);
int[] compiled =new int[1];
GLES20.glGetShaderiv(shader,GLES20.GL_COMPILE_STATUS,compiled,0);
if(compiled[0] ==0) {
Log.e(TAG,"Could not compile shader "+ shaderType +":");
Log.e(TAG," "+ GLES20.glGetShaderInfoLog(shader));
GLES20.glDeleteShader(shader);
shader =0;
}
returnshader;
}
/**
*創(chuàng)建gl program
*@paramvertexSource
*@paramfragmentSource
*@return
*/
private intcreateProgram(String vertexSource,String fragmentSource) {
intvertexShader = loadShader(GLES20.GL_VERTEX_SHADER,vertexSource);
if(vertexShader ==0) {
return0;
}
intpixelShader = loadShader(GLES20.GL_FRAGMENT_SHADER,fragmentSource);
if(pixelShader ==0) {
return0;
}
intprogram = GLES20.glCreateProgram();
if(program ==0) {
Log.e(TAG,"Could not create program");
}
GLES20.glAttachShader(program,vertexShader);
checkGlError("glAttachShader");
GLES20.glAttachShader(program,pixelShader);
checkGlError("glAttachShader");
GLES20.glLinkProgram(program);
int[] linkStatus =new int[1];
GLES20.glGetProgramiv(program,GLES20.GL_LINK_STATUS,linkStatus,0);
if(linkStatus[0] != GLES20.GL_TRUE) {
Log.e(TAG,"Could not link program: ");
Log.e(TAG,GLES20.glGetProgramInfoLog(program));
GLES20.glDeleteProgram(program);
program =0;
}
returnprogram;
}
public voidcheckGlError(String op) {
interror;
while((error = GLES20.glGetError()) != GLES20.GL_NO_ERROR) {
Log.e(TAG,op +": glError "+ error);
throw newRuntimeException(op +": glError "+ error);
}
}
public final voidcheckLocation(intlocation,String label) {
if(location <0) {
throw newRuntimeException("Unable to locate '"+ label +"' in program");
}
}
}
2、SurfaceTextureWrapper，主要是用作自定義紋理與Camera取出來的數(shù)據(jù)進(jìn)行包裝;
/**
* Created by jsp on 2016/9/29.
*/
public class SurfaceTextureWrapper
implements SurfaceTexture.OnFrameAvailableListener{
private SurfaceTexture mSurfaceTexture;
private SurfaceTextureRender mESTextureRender;
private Object mSyncObject = new Object();
private boolean mFrameAvailable;
public SurfaceTextureWrapper(){
mESTextureRender = new SurfaceTextureRender();
mESTextureRender.surfaceCreated();
//自定義texture地址直接構(gòu)造給SurfaceTexture
mSurfaceTexture = new SurfaceTexture(
mESTextureRender.getTextureId());
mSurfaceTexture.setOnFrameAvailableListener(this);
}
@Override
public void onFrameAvailable(SurfaceTexture surfaceTexture) {
synchronized (mSyncObject) {
if (mFrameAvailable) {
throw new RuntimeException("mFrameAvailable already set, frame could be dropped");
}
mFrameAvailable = true;
mSyncObject.notifyAll();
}
}
/**
* 渲染
*/
public final void drawImage() {
mESTextureRender.drawFrame(mSurfaceTexture);
}
/**
* 同步等待下一幀數(shù)據(jù)
*/
public final void awaitNewImage() {
// final int TIMEOUT_MS = 2500;
synchronized (mSyncObject) {
while (!mFrameAvailable) {
try {
// Wait for onFrameAvailable() to signal us. Use a timeout to avoid
// stalling the test if it doesn't arrive.
// mSyncObject.wait(TIMEOUT_MS);
mSyncObject.wait();
if (!mFrameAvailable) {
// TODO: if "spurious wakeup", continue while loop
throw new RuntimeException("Camera frame wait timed out");
}
} catch (InterruptedException ie) {
throw new RuntimeException(ie);
}
}
mFrameAvailable = false;
}
// Latch the data.
mESTextureRender.checkGlError("before updateTexImage");
//更新數(shù)據(jù)
mSurfaceTexture.updateTexImage();
}
/**
* 獲取渲染后SurfaceTexture
* @return
*/
public final SurfaceTexture getSurfaceTexture(){
return mSurfaceTexture;
}
/**
* 修改Fragment Shader
* @param fragmentShader
*/
public final void changeFragmentShader(String fragmentShader) {
mESTextureRender.changeFragmentShader(fragmentShader);
}
/**
* 釋放資源
*/
public final void release(){
mSurfaceTexture = null;
mESTextureRender= null;
}
}
3、WindowInputSurface EGL包裝類，里面封裝了，EGL的初始化，創(chuàng)建Surface,紋理映射等操作；
/**
* 窗口輸出表面
*/
public class WindowInputSurface {
private static final int EGL_RECORDABLE_ANDROID = 0x3142;
//gl設(shè)備
private EGLDisplay mEGLDisplay = EGL14.EGL_NO_DISPLAY;
//gl環(huán)境
private EGLContext mEGLContext = EGL14.EGL_NO_CONTEXT;
//gl表面
private EGLSurface mEGLSurface = EGL14.EGL_NO_SURFACE;
//gl屬性
private static final int[] mAttribList = {
EGL14.EGL_RED_SIZE, 8,
EGL14.EGL_GREEN_SIZE, 8,
EGL14.EGL_BLUE_SIZE, 8,
EGL14.EGL_ALPHA_SIZE, 8,
EGL14.EGL_RENDERABLE_TYPE, EGL14.EGL_OPENGL_ES2_BIT,
EGL_RECORDABLE_ANDROID, 1,
EGL14.EGL_NONE
};
//配置context屬性
private static final int[] mContextAttlist = {
EGL14.EGL_CONTEXT_CLIENT_VERSION, 2,
EGL14.EGL_NONE
};
//surface屬性
private static final int[] mSurfaceAttribs = {
EGL14.EGL_NONE
};
private Surface mSurface;
public WindowInputSurface(Surface mSurface) {
this.mSurface = mSurface;
init();
}
//初始化配置
private final void init(){
//創(chuàng)建設(shè)備
mEGLDisplay = EGL14.eglGetDisplay(EGL14.EGL_DEFAULT_DISPLAY);
if (mEGLDisplay == EGL14.EGL_NO_DISPLAY) {
throw new RuntimeException("unable to get EGL14 display");
}
//初始化設(shè)備
int[] version = new int[2];
if (!EGL14.eglInitialize(mEGLDisplay, version, 0, version, 1)) {
throw new RuntimeException("unable to initialize EGL14");
}
//根據(jù)屬性選擇最優(yōu)的配置
EGLConfig[] configs = new EGLConfig[1];
int[] numConfigs = new int[1];
EGL14.eglChooseConfig(mEGLDisplay, mAttribList, 0, configs, 0, configs.length,
numConfigs, 0);
checkEglError("eglCreateContext RGB888+recordable ES2");
mEGLContext = EGL14.eglCreateContext(
mEGLDisplay, configs[0], EGL14.EGL_NO_CONTEXT,
mContextAttlist, 0);
checkEglError("eglCreateContext");
mEGLSurface = EGL14.eglCreateWindowSurface(mEGLDisplay, configs[0], mSurface,
mSurfaceAttribs, 0);
checkEglError("eglCreateWindowSurface");
}
/**
* 準(zhǔn)備當(dāng)前渲染環(huán)境
*/
public final void makeCurrent() {
EGL14.eglMakeCurrent(mEGLDisplay,
mEGLSurface, mEGLSurface, mEGLContext);
checkEglError("eglMakeCurrent");
}
/**
* 生產(chǎn)數(shù)據(jù)
* @return
*/
public final boolean swapBuffers() {
boolean result = EGL14.eglSwapBuffers(mEGLDisplay, mEGLSurface);
checkEglError("eglSwapBuffers");
return result;
}
/**
* 設(shè)置下一幀數(shù)據(jù)時(shí)間戳
* @param nsecs
*/
public final void setPresentationTime(long nsecs) {
EGLExt.eglPresentationTimeANDROID(mEGLDisplay, mEGLSurface, nsecs);
checkEglError("eglPresentationTimeANDROID");
}
/**
* 釋放資源
*/
public final void release() {
if (mEGLDisplay != EGL14.EGL_NO_DISPLAY) {
EGL14.eglMakeCurrent(mEGLDisplay,
EGL14.EGL_NO_SURFACE, EGL14.EGL_NO_SURFACE,
EGL14.EGL_NO_CONTEXT);
EGL14.eglDestroySurface(mEGLDisplay, mEGLSurface);
EGL14.eglDestroyContext(mEGLDisplay, mEGLContext);
EGL14.eglReleaseThread();
EGL14.eglTerminate(mEGLDisplay);
}
mSurface.release();
mEGLDisplay = EGL14.EGL_NO_DISPLAY;
mEGLContext = EGL14.EGL_NO_CONTEXT;
mEGLSurface = EGL14.EGL_NO_SURFACE;
mSurface = null;
}
//檢查錯(cuò)誤
private final void checkEglError(String msg) {
int error;
if ((error = EGL14.eglGetError()) != EGL14.EGL_SUCCESS) {
throw new RuntimeException(msg + ": EGL error: 0x" + Integer.toHexString(error));
}
}
}
4、EncodeManager采集數(shù)據(jù)、渲染生成Mp4核心類；
/**
* 編解碼管理器
*/
public class EncodeManager implements Runnable{
private static final String TAG = "EncodeManager";
//編碼寬度
private static final int ENCODER_WIDTH = 640;
//編碼高度
private static final int ENCODER_HEIGHT = 480;
//bit rate
private static final int ENCODER_BIT_RATE = 6000000;
//視頻格式
private static final String MIME_TYPE = "video/avc";
//幀率
private static final int FRAME_RATE = 30;
//I幀間隔時(shí)間
private static final int IFRAME_INTERVAL = 5;
//Mp4輸出目錄
private static final File OUTPUT_DIR = Environment.getExternalStorageDirectory();
private MediaCodec.BufferInfo mBufferInfo;
private MediaCodec mEncoder;
private MediaMuxer mMediaMuxer;
private WindowInputSurface mWindowInputSurface;
private SurfaceTextureWrapper mSurfaceTexture;
private Camera mCamera;
private Thread mStartPreviewThread;
private boolean mStartPreview;
//視頻軌道
private int mTrackIndex;
//判斷muxer是否啟動
private boolean mMuxerStarted;
private MediaCallback mMediaCallback;
private String mOutputPath;
public EncodeManager(MediaCallback mediaCallback) {
mMediaCallback = mediaCallback;
}
/**
* 開始預(yù)覽數(shù)據(jù)，啟動入口
*/
public final void start(){
mStartPreview = true;
mStartPreviewThread = new Thread(this);
mStartPreviewThread.start();
}
/**
* 停止錄制
*/
public final void stop(){
mStartPreview = false;
Log.v(TAG,"開始停止錄像");
}
@Override
public void run() {
try{
//打開照相機(jī)
openCamera();
//初始化編碼器
initEncoder();
//準(zhǔn)備渲染環(huán)境
mWindowInputSurface.makeCurrent();
//紋理映射
attchSurfaceTexture();
//啟動照相預(yù)覽
mCamera.startPreview();
int frameCount = 0;
mMediaCallback.onStart();
while (mStartPreview){
drainEncoder(false);
if ((frameCount % 15) == 0) {
String fragmentShader = null;
if ((frameCount & 0x01) != 0) {
fragmentShader = SurfaceTextureRender.SWAPPED_FRAGMENT_SHADER;
}
mSurfaceTexture.changeFragmentShader(fragmentShader);
}
frameCount++;
//等待新數(shù)據(jù)
mSurfaceTexture.awaitNewImage();
//寫入一幀數(shù)據(jù)
mSurfaceTexture.drawImage();
//設(shè)置時(shí)間戳
mWindowInputSurface.setPresentationTime(
mSurfaceTexture.getSurfaceTexture().getTimestamp());
mWindowInputSurface.swapBuffers();
Log.v(TAG,"window input surface swap buffer success ");
}
//停止預(yù)覽
if(!mStartPreview){
Log.v(TAG,"stop preview start >>>> ");
drainEncoder(true);
Log.v(TAG,"停止錄像成功");
}
}catch (Exception e){
FileLoger.LOGE(TAG,"啟動發(fā)生異常--->>" + e.getMessage());
}finally {
release();
//完成一次錄像
mMediaCallback.onComplete();
}
}
//編碼
private final void drainEncoder(boolean endOfStream){
final int TIMEOUT_USEC = 10000;
//結(jié)束編碼
if (endOfStream) {
mEncoder.signalEndOfInputStream();
}
ByteBuffer[] outputBuffers = mEncoder.getOutputBuffers();
boolean outPutEnd = true;
while(outPutEnd){
//緩沖索引
int bufferIndex = mEncoder.dequeueOutputBuffer(
mBufferInfo, TIMEOUT_USEC);
switch (bufferIndex){
//等待數(shù)據(jù)狀態(tài)
case MediaCodec.INFO_TRY_AGAIN_LATER:
//如果不是結(jié)束流標(biāo)志，剛跳出循環(huán)
if (!endOfStream) {
outPutEnd = false;
}
break;
//
case MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED:
outputBuffers = mEncoder.getOutputBuffers();
break;
//編碼格式改變
case MediaCodec.INFO_OUTPUT_FORMAT_CHANGED:
if (mMuxerStarted) {
throw new RuntimeException("format changed twice");
}
MediaFormat newFormat = mEncoder.getOutputFormat();
// now that we have the Magic Goodies, start the muxer
mTrackIndex = mMediaMuxer.addTrack(newFormat);
mMediaMuxer.start();
mMuxerStarted = true;
break;
default:
if(bufferIndex >=0){
ByteBuffer buffer = outputBuffers[bufferIndex];
if (buffer == null) {
throw new RuntimeException("encoderOutputBuffer " + bufferIndex +
" was null");
}
if ((mBufferInfo.flags & MediaCodec.BUFFER_FLAG_CODEC_CONFIG) != 0) {
mBufferInfo.size = 0;
}
if (mBufferInfo.size != 0) {
if (!mMuxerStarted) {
throw new RuntimeException("muxer hasn't started");
}
// adjust the ByteBuffer values to match BufferInfo (not needed?)
buffer.position(mBufferInfo.offset);
buffer.limit(mBufferInfo.offset + mBufferInfo.size);
//寫入一幀數(shù)據(jù)
mMediaMuxer.writeSampleData(mTrackIndex, buffer, mBufferInfo);
}
//釋放buffer
mEncoder.releaseOutputBuffer(bufferIndex, false);
}
if ((mBufferInfo.flags &
MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0) {
outPutEnd = false;
}
break;
}
}
}
//打開攝像頭
private final void openCamera(){
if (mCamera != null) {
throw new RuntimeException("camera already initialized");
}
Camera.CameraInfo info = new Camera.CameraInfo();
// Try to find a front-facing camera (e.g. for videoconferencing).
int numCameras = Camera.getNumberOfCameras();
for (int i = 0; i < numCameras; i++) {
Camera.getCameraInfo(i, info);
if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
mCamera = Camera.open(i);
break;
}
}
if (mCamera == null) {
mCamera = Camera.open(); // opens first back-facing camera
}
if (mCamera == null) {
throw new RuntimeException("Unable to open camera");
}
Camera.Parameters parms = mCamera.getParameters();
choosePreviewSize(parms);
// leave the frame rate set to default
mCamera.setParameters(parms);
}
//選擇預(yù)覽大小
private final void choosePreviewSize(Camera.Parameters parms) {
Camera.Size ppsfv = parms.getPreferredPreviewSizeForVideo();
for (Camera.Size size : parms.getSupportedPreviewSizes()) {
if (size.width == ENCODER_WIDTH
&& size.height == ENCODER_HEIGHT) {
parms.setPreviewSize(ENCODER_WIDTH, ENCODER_HEIGHT);
return;
}
}
if (ppsfv != null) {
parms.setPreviewSize(ppsfv.width, ppsfv.height);
}
}
//初始化編碼器
private final void initEncoder(){
mBufferInfo = new MediaCodec.BufferInfo();
MediaFormat format = MediaFormat.createVideoFormat(
MIME_TYPE,ENCODER_WIDTH, ENCODER_HEIGHT);
format.setInteger(MediaFormat.KEY_COLOR_FORMAT,
MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface);
format.setInteger(MediaFormat.KEY_BIT_RATE, ENCODER_BIT_RATE);
format.setInteger(MediaFormat.KEY_FRAME_RATE, FRAME_RATE);
format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, IFRAME_INTERVAL);
mEncoder = MediaCodec.createEncoderByType(MIME_TYPE);
mEncoder.configure(format, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
mWindowInputSurface = new WindowInputSurface(
mEncoder.createInputSurface());
mEncoder.start();
//輸出目錄
mOutputPath = new File(OUTPUT_DIR,
ENCODER_WIDTH + "x" + ENCODER_HEIGHT + ".mp4").toString();
try {
mMediaMuxer = new MediaMuxer(mOutputPath, MediaMuxer.OutputFormat.MUXER_OUTPUT_MPEG_4);
} catch (IOException ioe) {
throw new RuntimeException("MediaMuxer creation failed", ioe);
}
mTrackIndex = -1;
mMuxerStarted = false;
}
public final String getOutPath(){
return mOutputPath;
}
//紋理映射
private final void attchSurfaceTexture() throws IOException {
mSurfaceTexture = new SurfaceTextureWrapper();
SurfaceTexture st = mSurfaceTexture.getSurfaceTexture();
mCamera.setPreviewTexture(st);
}
//釋放資源
private final void release(){
//釋放camera
if(null != mCamera){
mCamera.stopPreview();
mCamera.release();
mCamera = null;
}
//釋放編碼器
if (mEncoder != null) {
mEncoder.stop();
mEncoder.release();
mEncoder = null;
}
//釋放緩沖區(qū)
if (mWindowInputSurface != null) {
mWindowInputSurface.release();
mWindowInputSurface = null;
}
//釋放MediaMuxer資源
if (mMediaMuxer != null) {
mMediaMuxer.stop();
mMediaMuxer.release();
mMediaMuxer = null;
}
//釋放紋理
if (mSurfaceTexture != null) {
mSurfaceTexture.release();
mSurfaceTexture = null;
}
}
}
以上就是全部核心的代碼，稍后有時(shí)間了會再詳細(xì)的介紹下里面所需要用到的知識,流媒體，opengl等，敬請期待。
