ExoPlayer将画面渲染到另一个SurfaceTexture中
时间: 2024-02-06 18:10:02 浏览: 28
ExoPlayer可以将视频画面渲染到另一个SurfaceTexture中,以便进行后续处理或转换。这个过程需要通过自定义Renderer来实现。
首先需要创建一个自定义的Renderer类,实现Renderer接口中的方法。在实现doRender方法时,可以通过SurfaceTexture.attachToGLContext方法将目标SurfaceTexture绑定到OpenGL上下文,然后使用GLUtils.texImage2D将视频帧渲染到这个SurfaceTexture中。
下面是一个简单的示例代码:
```java
public class MyRenderer implements Renderer {
private SurfaceTexture targetSurfaceTexture;
private SurfaceTexture sourceSurfaceTexture;
public MyRenderer(SurfaceTexture targetSurfaceTexture, SurfaceTexture sourceSurfaceTexture) {
this.targetSurfaceTexture = targetSurfaceTexture;
this.sourceSurfaceTexture = sourceSurfaceTexture;
}
@Override
public void onSurfaceCreated(...) {
// 初始化OpenGL上下文
}
@Override
public void onSurfaceChanged(...) {
// 视图大小变化处理
}
@Override
public void onDrawFrame(...) {
// 将目标SurfaceTexture绑定到OpenGL上下文
targetSurfaceTexture.attachToGLContext(targetTextureId);
// 将视频帧渲染到目标SurfaceTexture中
GLES20.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, sourceTextureId);
GLUtils.texImage2D(GLES20.GL_TEXTURE_2D, 0, GLES20.GL_RGBA, width, height, 0, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, null);
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, 0);
// 将目标SurfaceTexture从OpenGL上下文中解绑
targetSurfaceTexture.detachFromGLContext();
}
}
```
在创建ExoPlayer时,需要将自定义Renderer传递给它,如下:
```java
SurfaceTexture targetSurfaceTexture = new SurfaceTexture(targetTextureId);
SurfaceTexture sourceSurfaceTexture = playerView.getVideoSurfaceView().getSurfaceTexture();
MyRenderer myRenderer = new MyRenderer(targetSurfaceTexture, sourceSurfaceTexture);
SimpleExoPlayer player = new SimpleExoPlayer.Builder(context).setRenderers(myRenderer).build();
```
这样就可以将ExoPlayer的视频画面渲染到另一个SurfaceTexture中了。