GSYVideoPlayer视频显示过程笔记
2022-06-22 本文已影响0人
紫鹰
项目中使用了GSYVideoPlayer，查看他们的demo，项目地址 https://github.com/CarGuo/GSYVideoPlayer
发现了一件让猴子有点疑惑的事
他们的demo中的自定义视频播放器控件 SampleCoverVideo，设置了R.layout.video_layout_cover，然而，布局文件里面压根没有视频播放器相关的控件。布局文件如下
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/black">
<FrameLayout
android:id="@+id/surface_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center">
</FrameLayout>
<RelativeLayout
android:id="@+id/thumb"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_alignParentBottom="true"
android:background="#000000"
android:scaleType="fitCenter">
<ImageView
android:id="@+id/thumbImage"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop" />
</RelativeLayout>
<LinearLayout
android:id="@+id/layout_bottom"
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_alignParentBottom="true"
android:background="#99000000"
android:gravity="center_vertical"
android:orientation="horizontal"
android:visibility="invisible">
<TextView
android:id="@+id/current"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:text="00:00"
android:textColor="#ffffff" />
<SeekBar
android:id="@+id/progress"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_weight="1.0"
android:background="@null"
android:max="100"
android:maxHeight="4dp"
android:minHeight="4dp"
android:paddingTop="8dp"
android:paddingBottom="8dp"
android:progressDrawable="@drawable/video_seek_progress"
android:thumb="@drawable/video_seek_thumb" />
<TextView
android:id="@+id/total"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="16dp"
android:text="00:00"
android:textColor="#ffffff" />
<ImageView
android:id="@+id/fullscreen"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:paddingRight="16dp"
android:scaleType="center"
android:src="@drawable/video_enlarge" />
</LinearLayout>
<ProgressBar
android:id="@+id/bottom_progressbar"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="match_parent"
android:layout_height="1.5dp"
android:layout_alignParentBottom="true"
android:max="100"
android:progressDrawable="@drawable/video_progress" />
<ImageView
android:id="@+id/back_tiny"
android:layout_width="24dp"
android:layout_height="24dp"
android:layout_marginLeft="6dp"
android:layout_marginTop="6dp"
android:visibility="gone" />
<LinearLayout
android:id="@+id/layout_top"
android:layout_width="match_parent"
android:layout_height="48dp"
android:background="@drawable/video_title_bg"
android:gravity="center_vertical">
<ImageView
android:id="@+id/back"
android:layout_width="48dp"
android:layout_height="48dp"
android:paddingLeft="10dp"
android:scaleType="centerInside"
android:src="@drawable/video_back" />
<TextView
android:id="@+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="10dp"
android:textColor="@android:color/white"
android:textSize="18sp" />
</LinearLayout>
<moe.codeest.enviews.ENDownloadView
android:id="@+id/loading"
android:layout_width="28dp"
android:layout_height="28dp"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:visibility="invisible" />
<moe.codeest.enviews.ENPlayView
android:id="@+id/start"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:layout_gravity="center_vertical" />
<ImageView
android:id="@+id/small_close"
android:layout_width="30dp"
android:layout_height="30dp"
android:paddingLeft="10dp"
android:paddingTop="10dp"
android:scaleType="centerInside"
android:src="@drawable/video_small_close"
android:visibility="gone" />
<ImageView
android:id="@+id/lock_screen"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="50dp"
android:scaleType="centerInside"
android:src="@drawable/unlock"
android:visibility="gone" />
</RelativeLayout>
接下来，就探究一下，视频是如何添加到view上面去的
仔细看demo的布局文件，唯一有可能和视频播放器相关的就是id为surface_container的一个FrameLayout，去代码中找一下，最终在自定义的顶层父类GSYTextureRenderView中找到protected ViewGroup mTextureViewContainer;
与mTextureViewContainer相关方法为
protected void addTextureView() {
mTextureView = new GSYRenderView();
mTextureView.addView(getContext(), mTextureViewContainer, mRotate, this, this,
mEffectFilter, mMatrixGL, mRenderer, mMode);
}
该方法在视频初始化，恢复播放等地方调用
在addTextureView方法中，mTextureViewContainer被当成参数传递给了GSYRenderView中的addView方法
看一下GSYRenderView中的addView方法
public void addView(final Context context, final ViewGroup textureViewContainer, final int rotate,
final IGSYSurfaceListener gsySurfaceListener,
final MeasureHelper.MeasureFormVideoParamsListener videoParamsListener,
final GSYVideoGLView.ShaderInterface effect, final float[] transform,
final GSYVideoGLViewBaseRender customRender, int mode) {
if (GSYVideoType.getRenderType() == GSYVideoType.SUFRACE) {
mShowView = GSYSurfaceView.addSurfaceView(context, textureViewContainer,
rotate, gsySurfaceListener, videoParamsListener);
} else if (GSYVideoType.getRenderType() == GSYVideoType.GLSURFACE) {
mShowView = GSYVideoGLView.addGLView(context, textureViewContainer, rotate, gsySurfaceListener, videoParamsListener, effect, transform, customRender, mode);
} else {
mShowView = GSYTextureView.addTextureView(context, textureViewContainer, rotate, gsySurfaceListener, videoParamsListener);
}
}
这里会根据GSYVideoType.getRenderType()的不同类型，将我们的mTextureViewContainer传递给三个不同的SurfaceView的子类中，以GSYVideoGLView的addGLView为例看一下
public static GSYVideoGLView addGLView(final Context context, final ViewGroup textureViewContainer, final int rotate,
final IGSYSurfaceListener gsySurfaceListener,
final MeasureHelper.MeasureFormVideoParamsListener videoParamsListener,
final GSYVideoGLView.ShaderInterface effect, final float[] transform,
final GSYVideoGLViewBaseRender customRender, final int renderMode) {
if (textureViewContainer.getChildCount() > 0) {
textureViewContainer.removeAllViews();
}
final GSYVideoGLView gsyVideoGLView = new GSYVideoGLView(context);
if (customRender != null) {
gsyVideoGLView.setCustomRenderer(customRender);
}
gsyVideoGLView.setEffect(effect);
gsyVideoGLView.setVideoParamsListener(videoParamsListener);
gsyVideoGLView.setRenderMode(renderMode);
gsyVideoGLView.setIGSYSurfaceListener(gsySurfaceListener);
gsyVideoGLView.setRotation(rotate);
gsyVideoGLView.initRender();
gsyVideoGLView.setGSYVideoGLRenderErrorListener(new GSYVideoGLRenderErrorListener() {
@Override
public void onError(GSYVideoGLViewBaseRender render, String Error, int code, boolean byChangedRenderError) {
if (byChangedRenderError)
addGLView(context,
textureViewContainer,
rotate,
gsySurfaceListener,
videoParamsListener,
render.getEffect(),
render.getMVPMatrix(),
render, renderMode);
}
});
if (transform != null && transform.length == 16) {
gsyVideoGLView.setMVPMatrix(transform);
}
GSYRenderView.addToParent(textureViewContainer, gsyVideoGLView);
return gsyVideoGLView;
}
这个方法新建了一个GSYVideoGLView对象
最终调用了 GSYRenderView.addToParent将textureViewContainer和新创建的GSYVideoGLView对象传递了进去。看一下addToParent方法
public static void addToParent(ViewGroup textureViewContainer, View render) {
int params = getTextureParams();
if (textureViewContainer instanceof RelativeLayout) {
RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(params, params);
layoutParams.addRule(RelativeLayout.CENTER_IN_PARENT);
textureViewContainer.addView(render, layoutParams);
} else if (textureViewContainer instanceof FrameLayout) {
FrameLayout.LayoutParams layoutParams = new FrameLayout.LayoutParams(params, params);
layoutParams.gravity = Gravity.CENTER;
textureViewContainer.addView(render, layoutParams);
}
}
绕了一大圈（其实是一种管理复杂性的策略），将render（也就是新创建的GSYVideoGLView对象，SurfaceView的子类）添加到了我们的textureViewContainer中。
看到了这里，明白了SurfaceView怎么添加到了布局中。那么新的问题出现了，怎么将SurfaceView设置给MediaPlayer的？那就继续追踪SurfaceView去那里了。
继续看代码GSYVideoGLView的init方法
private void init(Context context) {
mContext = context;
setEGLContextClientVersion(2);
mRenderer = new GSYVideoGLViewSimpleRender();
measureHelper = new MeasureHelper(this, this);
mRenderer.setSurfaceView(GSYVideoGLView.this);
}
SurfaceView通过setSurfaceView方法传递给了GSYVideoGLViewSimpleRender在GSYVideoGLViewSimpleRender的onSurfaceCreated方法中
@Override
public void onSurfaceCreated(GL10 glUnused, EGLConfig config) {
...
sendSurfaceForPlayer(surface);
}
以上方法最终调用了
public void sendSurfaceForPlayer(final Surface surface) {
mHandler.post(new Runnable() {
@Override
public void run() {
if (mGSYSurfaceListener != null) {
mGSYSurfaceListener.onSurfaceAvailable(surface);
}
}
});
}
通过接口，传递给了自定义控件GSYVideoGLView中
public void onSurfaceAvailable(Surface surface) {
if (mIGSYSurfaceListener != null) {
mIGSYSurfaceListener.onSurfaceAvailable(surface);
}
}
这里也只是做了一个转发，发给了IGSYSurfaceListener的实现GSYTextureRenderView
public void onSurfaceAvailable(Surface surface) {
pauseLogic(surface, (mTextureView != null && mTextureView.getShowView() instanceof TextureView));
}
pauseLogic方法为
protected void pauseLogic(Surface surface, boolean pauseLogic) {
mSurface = surface;
if (pauseLogic)
//显示暂停切换显示的图片
showPauseCover();
setDisplay(mSurface);
}
最终调用了GSYVideoView的
protected void setDisplay(Surface surface) {
getGSYVideoManager().setDisplay(surface);
}
进入了GSYVideoBaseManager的
public void setDisplay(Surface holder) {
Message msg = new Message();
msg.what = HANDLER_SETDISPLAY;
msg.obj = holder;
showDisplay(msg);
}
showDisplay方法
private void showDisplay(Message msg) {
if (playerManager != null) {
playerManager.showDisplay(msg);
}
}
以SystemPlayerManager为例看看
public void showDisplay(Message msg) {
if (msg.obj == null && mediaPlayer != null && !release) {
mediaPlayer.setSurface(null);
} else if (msg.obj != null) {
Surface holder = (Surface) msg.obj;
surface = holder;
if (mediaPlayer != null && holder.isValid() && !release) {
mediaPlayer.setSurface(holder);
}
if (!isPlaying) {
pause();
}
}
}
终于看到了mediaPlayer.setSurface(holder)
到了这里，总算是明白了MediaPlayer如何和页面关联起来的了。
