PhotoMovie(https://github.com/yellowcath/PhotoMovie)可輕鬆實現類似抖音、微視、美拍的照片電影功能。效果如下
濾鏡效果
filter.gif
轉場效果
transfer.gif
基本用法
//添加圖片
List<PhotoData> photoDataList = new LinkedList<PhotoData>();
photoDataList.add(new SimplePhotoData(context,photoPath1,PhotoData.STATE_LOCAL));
...
photoDataList.add(new SimplePhotoData(context,photoPathN,PhotoData.STATE_LOCAL));
//生成圖片源
PhotoSource photoSource = new PhotoSource(photoDataList);
//生成照片電影(使用預定義的水平轉場動畫)
PhotoMovie photoMovie = PhotoMovieFactory.generatePhotoMovie(photoSource, PhotoMovieFactory.PhotoMovieType.HORIZONTAL_TRANS);
//生成負責繪製電影內容的MovieRenderer
MovieRenderer movieRenderer = new GLTextureMovieRender(glTextureView);
/**
* OR MovieRenderer movieRenderer = new GLSurfaceMovieRenderer(glSurfaceView);
*/
//照片電影播放器
PhotoMoviePlayer photoMoviePlayer = new PhotoMoviePlayer(context);
photoMoviePlayer.setMovieRenderer(mMovieRenderer);
photoMoviePlayer.setMovieListener(...);
photoMoviePlayer.setLoop(true);
photoMoviePlayer.setOnPreparedListener(new PhotoMoviePlayer.OnPreparedListener() {
@Override
public void onPreparing(PhotoMoviePlayer moviePlayer, float progress) {
}
@Override
public void onPrepared(PhotoMoviePlayer moviePlayer, int prepared, int total) {
mPhotoMoviePlayer.start();
}
@Override
public void onError(PhotoMoviePlayer moviePlayer) {
}
});
photoMoviePlayer.prepare();
輕鬆擴展
PhotoMovie使用模塊化的設計,每個部分都可以自定義然後替換,主要類圖如下
PhotoMovie.png
,在這段時間之內以特定的方式播放圖片,例如ScaleSegment會對圖片做縮放動畫、EndGaussianBlurSegment會對圖片做從清晰到模糊的高斯模糊動畫
-
PhotoMovie:核心類,代表照片電影本身,由圖片源(PhotoSource)和若干電影片段(MovieSegment)組成一個完整的照片電影,圖片通過PhotoAllocator分配給MovieSegment
-
MovieLayer:爲MovieSegment擴展繪製多層特效的功能,例如SubtitleLayer提供字幕展示
-
IMovieFilter:爲整個照片電影提供濾鏡
-
MovieRenderer:負責把照片電影渲染到指定的輸出界面,例如TextureView(GLTextureMovieRender)、GLSurfaceView(GLSurfaceMovieRenderer)
-
PhotoMoviePlayer:提供類似MediaPlayer的接口,負責播放照片電影,播放進度由IMovieTimer控制
擴展電影類型
目前內置了6種類型,後兩種即是抖音的左右切換和上下切換,Thaw和WINDOW仿自美拍
public enum PhotoMovieType {
THAW, //融雪
SCALE, //縮放
SCALE_TRANS, //縮放 & 平移
WINDOW, //窗扉
HORIZONTAL_TRANS,//橫向平移
VERTICAL_TRANS//縱向平移
}
這裏以微視的漸變特效爲例展示如何擴展
分析得出,漸變特效首先圖片居中放置,然後全程做一個微弱的放大動畫,後半部分同時透明度變化消失
,更直觀的流程如下圖
gradient_timeline.png
可見需要兩個不同的片段類型
首先創建FitCenterScaleSegment,繼承FitCenterSegment,實現單張圖片的放大動畫
public class FitCenterScaleSegment extends FitCenterSegment {
/**
* 縮放動畫範圍
*/
private float mScaleFrom;
private float mScaleTo;
private float mProgress;
/**
* @param duration 片段時長
* @param scaleFrom 縮放範圍
* @param scaleTo 縮放範圍
*/
public FitCenterScaleSegment(int duration, float scaleFrom, float scaleTo) {
super(duration);
mScaleFrom = scaleFrom;
mScaleTo = scaleTo;
}
@Override
protected void onDataPrepared() {
super.onDataPrepared();
}
@Override
public void drawFrame(GLESCanvas canvas, float segmentProgress) {
mProgress = segmentProgress;
if (!mDataPrepared) {
return;
}
drawBackground(canvas);
float scale = mScaleFrom + (mScaleTo - mScaleFrom) * mProgress;
//FitCenterSegment已經具有縮放能力,這裏傳縮放值即可
drawContent(canvas, scale);
}
//提升這兩個函數的訪問權限,供轉場時使用
@Override
public void drawContent(GLESCanvas canvas, float scale) {
super.drawContent(canvas, scale);
}
@Override
public void drawBackground(GLESCanvas canvas) {
super.drawBackground(canvas);
}
}
然後創建轉場片段GradientTransferSegment,其父類TransitionSegment同時持有上一個與下一個片段,
可以在其基礎上實現任意轉場功能
public class GradientTransferSegment extends TransitionSegment<FitCenterScaleSegment, FitCenterScaleSegment> {
/**
* 縮放動畫範圍
*/
private float mPreScaleFrom;
private float mPreScaleTo;
private float mNextScaleFrom;
private float mNextScaleTo;
public GradientTransferSegment(int duration,
float preScaleFrom, float preScaleTo,
float nextScaleFrom, float nextScaleTo) {
mPreScaleFrom = preScaleFrom;
mPreScaleTo = preScaleTo;
mNextScaleFrom = nextScaleFrom;
mNextScaleTo = nextScaleTo;
setDuration(duration);
}
@Override
protected void onDataPrepared() {
}
@Override
public void drawFrame(GLESCanvas canvas, float segmentProgress) {
//下一個片段開始放大
float nextScale = mNextScaleFrom + (mNextScaleTo - mNextScaleFrom) * segmentProgress;
mNextSegment.drawContent(canvas, nextScale);
//上一個片段繼續放大同時變透明
float preScale = mPreScaleFrom + (mPreScaleTo - mPreScaleFrom) * segmentProgress;
float alpha = 1 - segmentProgress;
mPreSegment.drawBackground(canvas);
canvas.save();
canvas.setAlpha(alpha);
mPreSegment.drawContent(canvas, preScale);
canvas.restore();
}
創建照片電影
private static PhotoMovie initGradientPhotoMovie(PhotoSource photoSource) {
List<MovieSegment> segmentList = new ArrayList<>(photoSource.size());
for (int i = 0; i < photoSource.size(); i++) {
if (i == 0) {
segmentList.add(new FitCenterScaleSegment(1600, 1f, 1.1f));
} else {
segmentList.add(new FitCenterScaleSegment(1600, 1.05f, 1.1f));
}
if (i < photoSource.size() - 1) {
segmentList.add(new GradientTransferSegment(800, 1.1f, 1.15f, 1.0f, 1.05f));
}
}
return new PhotoMovie(photoSource, segmentList);
}
然後將這個PhotoMovie正常播放即可,效果如下
gradient.gif
擴展濾鏡
目前內置了9個濾鏡
public enum FilterType {
NONE,
CAMEO,//浮雕
GRAY,//黑白
KUWAHARA,//水彩
SNOW,//飄雪(動態)
LUT1,
LUT2,
LUT3,
LUT4,
LUT5,
}
先看IMovieFilter
public interface IMovieFilter {
void doFilter(PhotoMovie photoMovie,int elapsedTime, FboTexture inputTexture, FboTexture outputTexture);
void release();
}
外部會提供一個輸入紋理,然後由IMovieFilter處理之後繪製到輸出紋理上,即實現了濾鏡效果
BaseMovieFilter已經實現了基本的輸入輸出流程,例如要做最基本的黑白濾鏡,只需更換FRAGMENT_SHADER即可
public class GrayMovieFilter extends BaseMovieFilter {
protected static final String FRAGMENT_SHADER = "" +
"varying highp vec2 textureCoordinate;\n" +
" \n" +
"uniform sampler2D inputImageTexture;\n" +
" \n" +
"void main()\n" +
"{\n" +
" mediump vec4 color = texture2D(inputImageTexture, textureCoordinate);\n" +
" mediump float gray = color.r*0.3+color.g*0.59+color.b*0.11;\n"+
" gl_FragColor = vec4(gray,gray,gray,1.0);\n"+
"}";
public GrayMovieFilter(){
super(VERTEX_SHADER,FRAGMENT_SHADER);
}
}
同時PhotoMovie提供了對Lut濾鏡的支持
Lut其實就是Lookup Table(顏色查找表),根據原圖的RGB值去相應的lut圖裏面查找對應轉換後的RGB值,從而實現各種濾鏡效果
lut | 效果 |
---|---|
lut(原圖) |
原圖 |
lut_2.jpg |
濾鏡效果圖 |
public class LutMovieFilter extends TwoTextureMovieFilter {
public LutMovieFilter(Bitmap lutBitmap){
super(loadShaderFromAssets("shader/two_vertex.glsl"),loadShaderFromAssets("shader/lut.glsl"));
setBitmap(lutBitmap);
}
}
在LutMovieFilter的構造函數傳入上面表格裏的lut圖,即可實現相應的濾鏡效果,前面提到的黑白濾鏡也可用這個方式實現
錄製功能
GLMovieRecorder提供了將照片電影錄製爲mp4的功能
可參照DemoPresenter的saveVideo()函數
GLMovieRecorder recorder = new GLMovieRecorder();
recorder.configOutput(width, height(), bitrate,frameRate,iFrameInterval, outputPath);
recorder.setDataSource(movieRenderer);
recorder.startRecord(new GLMovieRecorder.OnRecordListener() {
@Override
public void onRecordFinish(boolean success) {
......
}
@Override
public void onRecordProgress(int recordedDuration, int totalDuration) {
......
}
});
背景音樂
mPhotoMoviePlayer.setMusic(context, mMusicUri);
PhotoMovie只提供了播放背景音樂的功能,錄製完成之後需自行合成,Demo裏使用了
VideoProcessor進行合成
VideoProcessor.mixAudioTrack(context, videPath, audioPath,outputPath, null, null, 0,100, 1f, 1f);
小禮物走一走,來簡書關注我
作者:yellowcath
鏈接:https://www.jianshu.com/p/863b65e4a9e4
來源:簡書
簡書著作權歸作者所有,任何形式的轉載都請聯繫作者獲得授權並註明出處。