| /* Copyright 2020 The TensorFlow Authors. All Rights Reserved. |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| ==============================================================================*/ |
| |
| package org.tensorflow.lite.support.image; |
| |
| import android.graphics.Bitmap; |
| import android.util.Log; |
| |
| import org.tensorflow.lite.DataType; |
| import org.tensorflow.lite.support.tensorbuffer.TensorBuffer; |
| |
| /** Holds a {@link TensorBuffer} and converts it to other image formats as needed. */ |
| final class TensorBufferContainer implements ImageContainer { |
| private final TensorBuffer buffer; |
| private final ColorSpaceType colorSpaceType; |
| private static final String TAG = TensorBufferContainer.class.getSimpleName(); |
| |
| /** |
| * Creates a {@link TensorBufferContainer} object with the specified {@link |
| * TensorImage#ColorSpaceType}. |
| * |
| * @throws IllegalArgumentException if the shape of the {@link TensorBuffer} does not match the |
| * specified color space type |
| */ |
| static TensorBufferContainer create(TensorBuffer buffer, ColorSpaceType colorSpaceType) { |
| return new TensorBufferContainer(buffer, colorSpaceType); |
| } |
| |
| private TensorBufferContainer(TensorBuffer buffer, ColorSpaceType colorSpaceType) { |
| colorSpaceType.assertShape(buffer.getShape()); |
| this.buffer = buffer; |
| this.colorSpaceType = colorSpaceType; |
| } |
| |
| @Override |
| public TensorBufferContainer clone() { |
| return create(TensorBuffer.createFrom(buffer, buffer.getDataType()), colorSpaceType); |
| } |
| |
| @Override |
| public Bitmap getBitmap() { |
| if (buffer.getDataType() != DataType.UINT8) { |
| // Print warning instead of throwing an exception. When using float models, users may |
| // want to convert the resulting float image into Bitmap. That's fine to do so, as long |
| // as they are aware of the potential accuracy lost when casting to uint8. |
| Log.w(TAG, |
| "<Warning> TensorBufferContainer is holding a non-uint8 image. The conversion to Bitmap" |
| + " will cause numeric casting and clamping on the data value."); |
| } |
| |
| return colorSpaceType.convertTensorBufferToBitmap(buffer); |
| } |
| |
| @Override |
| public TensorBuffer getTensorBuffer(DataType dataType) { |
| // If the data type of buffer is desired, return it directly. Not making a defensive copy |
| // for performance considerations. During image processing, users may need to set and get |
| // the TensorBuffer many times. Otherwise, create another one with the expected data type. |
| return buffer.getDataType() == dataType ? buffer |
| : TensorBuffer.createFrom(buffer, dataType); |
| } |
| |
| @Override |
| public int getWidth() { |
| return colorSpaceType.getWidth(buffer.getShape()); |
| } |
| |
| @Override |
| public int getHeight() { |
| return colorSpaceType.getHeight(buffer.getShape()); |
| } |
| |
| @Override |
| public ColorSpaceType getColorSpaceType() { |
| return colorSpaceType; |
| } |
| } |