private int getEstimatedTotalFrameSize() {
if (frameSize == -1) {
return decoder.getDecodedFramesByteSizeSum();
} else {
return frameSize * decoder.getFrameCount();
}
}
public GifFrameManager(
Context context,
BitmapPool bitmapPool,
GifDecoder decoder,
Handler mainHandler,
Transformation<Bitmap> transformation,
int targetWidth,
int targetHeight) {
this.context = context;
this.decoder = decoder;
this.mainHandler = mainHandler;
this.transformation = transformation;
this.targetWidth = targetWidth;
this.targetHeight = targetHeight;
calculator = new MemorySizeCalculator(context);
frameLoader = new GifFrameModelLoader();
frameResourceDecoder = new GifFrameResourceDecoder(bitmapPool);
sourceEncoder = NullEncoder.get();
if (!decoder.isTransparent()) {
// For non transparent gifs, we can beat the performance of our gif decoder for each frame by
// decoding jpegs
// from disk.
cacheDecoder = new StreamBitmapDecoder(context);
encoder = new BitmapEncoder(Bitmap.CompressFormat.JPEG, 70);
} else {
// For transparent gifs, we would have to encode as pngs which is actually slower than our gif
// decoder so we
// avoid writing frames to the disk cache entirely.
cacheDecoder = NullDecoder.get();
encoder = SkipCache.get();
}
}
@Test
public void testReturnsFrameFromGifDecoder() throws IOException {
Bitmap expected = Bitmap.createBitmap(100, 100, Bitmap.Config.ARGB_4444);
when(gifDecoder.getNextFrame()).thenReturn(expected);
assertEquals(expected, resourceDecoder.decode(gifDecoder, 100, 100).get());
}
public void getNextFrame(FrameCallback cb) {
decoder.advance();
// We don't want to blow out the entire memory cache with frames of gifs, so try to set some
// maximum size beyond which we will always just decode one frame at a time.
boolean skipCache = getEstimatedTotalFrameSize() > calculator.getMemoryCacheSize() / 2;
long targetTime =
SystemClock.uptimeMillis() + (Math.max(MIN_FRAME_DELAY, decoder.getNextDelay()));
next = new DelayTarget(cb, targetTime);
Glide.with(context)
.using(frameLoader, GifDecoder.class)
.load(decoder)
.as(Bitmap.class)
.decoder(frameResourceDecoder)
.cacheDecoder(cacheDecoder)
.transform(transformation)
.encoder(encoder)
.sourceEncoder(sourceEncoder)
.skipMemoryCache(skipCache)
.into(next);
}
@Override
public Resource<Bitmap> decode(GifDecoder source, int width, int height) throws IOException {
Bitmap bitmap = source.getNextFrame();
return new BitmapResource(bitmap, bitmapPool);
}
