Question

我试图在两个不同的纹理视图中同时播放相同的视频。我使用了grafika（MoviePlayer和ContinuousCaptureActivity）的代码来尝试让它工作（感谢fadden）。为了使问题更简单，我首先尝试使用一个TextureView。

目前我已经创建了一个TextureView，一旦它获得了SurfaceTexture，我创建了一个WindowSurface并使其成为当前的。然后我生成一个使用FullFrameRect对象生成的TextureID。

@Override
public void onSurfaceTextureAvailable(SurfaceTexture surface, int
        width, int height) {
    mSurfaceTexture = surface;
    mEGLCore = new EglCore(null, EglCore.FLAG_TRY_GLES3);
    Log.d("EglCore", "EGL core made");
    mDisplaySurface = new WindowSurface(mEGLCore, mSurfaceTexture);
    mDisplaySurface.makeCurrent();
    Log.d("DisplaySurface", "mDisplaySurface made");
    mFullFrameBlit = new FullFrameRect(new Texture2dProgram(Texture2dProgram.ProgramType.TEXTURE_EXT));
    mTextureID = mFullFrameBlit.createTextureObject();

    //mSurfaceTexture.attachToGLContext(mTextureID);
    clickPlayStop(null);
}

然后我得到一个离屏SurfaceTexture，将它与我上面的TextureID链接并创建一个表面以传递给MoviePlayer：

public void clickPlayStop(@SuppressWarnings("unused") View unused) {
    if (mShowStopLabel) {
        Log.d(TAG, "stopping movie");
        stopPlayback();
        // Don't update the controls here -- let the task thread do it after the movie has
        // actually stopped.
        //mShowStopLabel = false;
        //updateControls();
    } else {
        if (mPlayTask != null) {
            Log.w(TAG, "movie already playing");
            return;
        }
        Log.d(TAG, "starting movie");
        SpeedControlCallback callback = new SpeedControlCallback();
        callback.setFixedPlaybackRate(24);

        MoviePlayer player = null;
        MovieTexture = new SurfaceTexture(mTextureID);
        MovieTexture.setOnFrameAvailableListener(this);
        Surface surface = new Surface(MovieTexture);
        try {
            player = new MoviePlayer(surface, callback, this);//TODO
        } catch (IOException ioe) {
            Log.e(TAG, "Unable to play movie", ioe);

            return;
        }

        adjustAspectRatio(player.getVideoWidth(), player.getVideoHeight());

        mPlayTask = new MoviePlayer.PlayTask(player, this);
        mPlayTask.setLoopMode(true);


        mShowStopLabel = true;
        mPlayTask.execute();
    }
}

我们的想法是SurfaceTexture获得一个原始帧，我可以将其用作OES_external纹理，以便从OpenGL中进行采样。然后我可以在将WindowSurface设置为当前后从我的EGLContext调用DrawFrame（）。

private void drawFrame() {
    Log.d(TAG, "drawFrame");
    if (mEGLCore == null) {
        Log.d(TAG, "Skipping drawFrame after shutdown");
        return;
    }

    // Latch the next frame from the camera.
    mDisplaySurface.makeCurrent();
    MovieTexture.updateTexImage();
    MovieTexture.getTransformMatrix(mTransformMatrix);

    // Fill the WindowSurface with it.
    int viewWidth = mTextureView.getWidth();
    int viewHeight = mTextureView.getHeight();
    GLES20.glViewport(0, 0, viewWidth, viewHeight);
    mFullFrameBlit.drawFrame(mTextureID, mTransformMatrix);
    mDisplaySurface.swapBuffers();
}

如果我想用2个TextureViews来做，想法是调用makeCurrent（）并为每个视图绘制每个缓冲区，然后在绘制完成后调用swapBuffers（）。

这就是我想要做的，但我很确定这不是我的代码实际上正在做的事情。有人可以帮我理解我需要改变什么才能让它发挥作用吗？

@Fadden

更新：这很有趣。我将onSurfaceTextureAvailable中的代码更改为：

@Override
public void onSurfaceTextureAvailable(SurfaceTexture surface, int
        width, int height) {
    mSurfaceTexture = surface;
    TextureHeight = height;
    TextureWidth = width;
    //mEGLCore = new EglCore(null, EglCore.FLAG_TRY_GLES3);
    Log.d("EglCore", "EGL core made");
    //mDisplaySurface = new WindowSurface(mEGLCore, mSurfaceTexture);
    //mDisplaySurface.makeCurrent();
    Log.d("DisplaySurface", "mDisplaySurface made");
    //mFullFrameBlit = new FullFrameRect(new Texture2dProgram(Texture2dProgram.ProgramType.OPENGL_TEST));
    //mTextureID = mFullFrameBlit.createTextureObject();
    //clickPlayStop(null);


    // Fill the SurfaceView with it.
    //int viewWidth = width;
    //int viewHeight = height;
    //GLES20.glViewport(0, 0, viewWidth, viewHeight);
    //mFullFrameBlit.drawFrame(mTextureID, mTransformMatrix);
    //mFullFrameBlit.openGLTest();
    //mFullFrameBlit.testDraw(mDisplaySurface.getHeight(),mDisplaySurface.getWidth());
    //mDisplaySurface.swapBuffers();
}

所以，它不应该调用其他任何东西，只显示空的TextureView - 这就是我所看到的......

Answer 1

感谢Fadden的帮助。

因此，当我使用新线程解码并生成帧时，似乎已经解决了一些未知问题。我还没有发现导致原始问题的原因，但我找到了解决方法。

使用OpenGL和MediaCodec播放视频

1 个答案: