1 package com.bumptech.glide.load.resource.bitmap; 2 3 import android.graphics.Bitmap; 4 import android.media.MediaMetadataRetriever; 5 import android.os.ParcelFileDescriptor; 6 7 import com.bumptech.glide.load.DecodeFormat; 8 import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool; 9 10 import java.io.IOException; 11 12 /** 13 * An {@link com.bumptech.glide.load.resource.bitmap.BitmapDecoder} that can decode a thumbnail frame 14 * {@link Bitmap} from a {@link android.os.ParcelFileDescriptor} containing a video. 15 * 16 * @see android.media.MediaMetadataRetriever 17 */ 18 public class VideoBitmapDecoder implements BitmapDecoder<ParcelFileDescriptor> { 19 private static final MediaMetadataRetrieverFactory DEFAULT_FACTORY = new MediaMetadataRetrieverFactory(); 20 private MediaMetadataRetrieverFactory factory; 21 22 public VideoBitmapDecoder() { 23 this(DEFAULT_FACTORY); 24 } 25 26 VideoBitmapDecoder(MediaMetadataRetrieverFactory factory) { 27 this.factory = factory; 28 } 29 30 @Override 31 public Bitmap decode(ParcelFileDescriptor resource, BitmapPool bitmapPool, int outWidth, int outHeight, 32 DecodeFormat decodeFormat) 33 throws IOException { 34 MediaMetadataRetriever mediaMetadataRetriever = factory.build(); 35 mediaMetadataRetriever.setDataSource(resource.getFileDescriptor()); 36 Bitmap result = mediaMetadataRetriever.getFrameAtTime(); 37 mediaMetadataRetriever.release(); 38 resource.close(); 39 return result; 40 } 41 42 @Override 43 public String getId() { 44 return "VideoBitmapDecoder.com.bumptech.glide.load.resource.bitmap"; 45 } 46 47 // Visible for testing. 48 static class MediaMetadataRetrieverFactory { 49 public MediaMetadataRetriever build() { 50 return new MediaMetadataRetriever(); 51 } 52 } 53 } 54
