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      1 /*
      2  * Copyright 2018 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package androidx.media.widget;
     18 
     19 import static androidx.media.widget.VideoView2.VIEW_TYPE_TEXTUREVIEW;
     20 
     21 import android.content.Context;
     22 import android.graphics.SurfaceTexture;
     23 import android.util.Log;
     24 import android.view.Surface;
     25 import android.view.TextureView;
     26 import android.view.View;
     27 
     28 import androidx.annotation.NonNull;
     29 import androidx.annotation.RequiresApi;
     30 import androidx.media.MediaPlayer2;
     31 
     32 @RequiresApi(21)
     33 class VideoTextureView extends TextureView
     34         implements VideoViewInterface, TextureView.SurfaceTextureListener {
     35     private static final String TAG = "VideoTextureViewWithMp1";
     36     private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);
     37 
     38     private Surface mSurface;
     39     private SurfaceListener mSurfaceListener;
     40     private MediaPlayer2 mMediaPlayer;
     41     // A flag to indicate taking over other view should be proceed.
     42     private boolean mIsTakingOverOldView;
     43     private VideoViewInterface mOldView;
     44 
     45     VideoTextureView(Context context) {
     46         super(context, null);
     47         setSurfaceTextureListener(this);
     48     }
     49 
     50     ////////////////////////////////////////////////////
     51     // implements VideoViewInterfaceWithMp1
     52     ////////////////////////////////////////////////////
     53 
     54     @Override
     55     public boolean assignSurfaceToMediaPlayer(MediaPlayer2 mp) {
     56         if (mp == null || !hasAvailableSurface()) {
     57             // Surface is not ready.
     58             return false;
     59         }
     60         mp.setSurface(mSurface);
     61         return true;
     62     }
     63 
     64     @Override
     65     public void setSurfaceListener(SurfaceListener l) {
     66         mSurfaceListener = l;
     67     }
     68 
     69     @Override
     70     public int getViewType() {
     71         return VIEW_TYPE_TEXTUREVIEW;
     72     }
     73 
     74     @Override
     75     public void setMediaPlayer(MediaPlayer2 mp) {
     76         mMediaPlayer = mp;
     77         if (mIsTakingOverOldView) {
     78             takeOver(mOldView);
     79         }
     80     }
     81 
     82     @Override
     83     public void takeOver(@NonNull VideoViewInterface oldView) {
     84         if (assignSurfaceToMediaPlayer(mMediaPlayer)) {
     85             ((View) oldView).setVisibility(GONE);
     86             mIsTakingOverOldView = false;
     87             mOldView = null;
     88             if (mSurfaceListener != null) {
     89                 mSurfaceListener.onSurfaceTakeOverDone(this);
     90             }
     91         } else {
     92             mIsTakingOverOldView = true;
     93             mOldView = oldView;
     94         }
     95     }
     96 
     97     @Override
     98     public boolean hasAvailableSurface() {
     99         return mSurface != null && mSurface.isValid();
    100     }
    101 
    102     ////////////////////////////////////////////////////
    103     // implements TextureView.SurfaceTextureListener
    104     ////////////////////////////////////////////////////
    105 
    106     @Override
    107     public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int width, int height) {
    108         mSurface = new Surface(surfaceTexture);
    109         if (mIsTakingOverOldView) {
    110             takeOver(mOldView);
    111         } else {
    112             assignSurfaceToMediaPlayer(mMediaPlayer);
    113         }
    114         if (mSurfaceListener != null) {
    115             mSurfaceListener.onSurfaceCreated(this, width, height);
    116         }
    117     }
    118 
    119     @Override
    120     public void onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture, int width, int height) {
    121         if (mSurfaceListener != null) {
    122             mSurfaceListener.onSurfaceChanged(this, width, height);
    123         }
    124         // requestLayout();  // TODO: figure out if it should be called here?
    125     }
    126 
    127     @Override
    128     public void onSurfaceTextureUpdated(SurfaceTexture surface) {
    129         // no-op
    130     }
    131 
    132     @Override
    133     public boolean onSurfaceTextureDestroyed(SurfaceTexture surfaceTexture) {
    134         if (mSurfaceListener != null) {
    135             mSurfaceListener.onSurfaceDestroyed(this);
    136         }
    137         mSurface = null;
    138         return true;
    139     }
    140 
    141     @Override
    142     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    143         int videoWidth = (mMediaPlayer == null) ? 0 : mMediaPlayer.getVideoWidth();
    144         int videoHeight = (mMediaPlayer == null) ? 0 : mMediaPlayer.getVideoHeight();
    145         if (DEBUG) {
    146             Log.d(TAG, "onMeasure(" + MeasureSpec.toString(widthMeasureSpec) + ", "
    147                     + MeasureSpec.toString(heightMeasureSpec) + ")");
    148             Log.i(TAG, " measuredSize: " + getMeasuredWidth() + "/" + getMeasuredHeight());
    149             Log.i(TAG, " viewSize: " + getWidth() + "/" + getHeight());
    150             Log.i(TAG, " mVideoWidth/height: " + videoWidth + ", " + videoHeight);
    151         }
    152 
    153         int width = getDefaultSize(videoWidth, widthMeasureSpec);
    154         int height = getDefaultSize(videoHeight, heightMeasureSpec);
    155 
    156         if (videoWidth > 0 && videoHeight > 0) {
    157             int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec);
    158             int heightSpecSize = MeasureSpec.getSize(heightMeasureSpec);
    159 
    160             width = widthSpecSize;
    161             height = heightSpecSize;
    162 
    163             // for compatibility, we adjust size based on aspect ratio
    164             if (videoWidth * height < width * videoHeight) {
    165                 width = height * videoWidth / videoHeight;
    166                 if (DEBUG) {
    167                     Log.d(TAG, "image too wide, correcting. width: " + width);
    168                 }
    169             } else if (videoWidth * height > width * videoHeight) {
    170                 height = width * videoHeight / videoWidth;
    171                 if (DEBUG) {
    172                     Log.d(TAG, "image too tall, correcting. height: " + height);
    173                 }
    174             }
    175         } else {
    176             // no size yet, just adopt the given spec sizes
    177         }
    178         setMeasuredDimension(width, height);
    179         if (DEBUG) {
    180             Log.i(TAG, "end of onMeasure()");
    181             Log.i(TAG, " measuredSize: " + getMeasuredWidth() + "/" + getMeasuredHeight());
    182         }
    183     }
    184 }
    185