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/*
* Copyright (C) 2014 The Android Open Source Project
*
* 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 android.hardware.camera2.params;
import static com.android.internal.util.Preconditions.*;
import static android.hardware.camera2.params.StreamConfigurationMap.checkArgumentFormatInternal;
import android.graphics.ImageFormat;
import android.hardware.camera2.CameraCharacteristics;
import android.hardware.camera2.CameraDevice;
import android.hardware.camera2.utils.HashCodeHelpers;
import android.graphics.PixelFormat;
import android.util.Size;
/**
* Immutable class to store the available stream
* {@link CameraCharacteristics#SCALER_AVAILABLE_STREAM_CONFIGURATIONS configurations} to set up
* {@link android.view.Surface Surfaces} for creating a {@link CameraCaptureSession capture session}
* with {@link CameraDevice#createCaptureSession}.
* <!-- TODO: link to input stream configuration -->
*
* <p>This is the authoritative list for all input/output formats (and sizes respectively
* for that format) that are supported by a camera device.</p>
*
* @see CameraCharacteristics#SCALER_AVAILABLE_STREAM_CONFIGURATIONS
*
* @hide
*/
public final class StreamConfiguration {
/**
* Create a new {@link StreamConfiguration}.
*
* @param format image format
* @param width image width, in pixels (positive)
* @param height image height, in pixels (positive)
* @param input true if this is an input configuration, false for output configurations
*
* @throws IllegalArgumentException
* if width/height were not positive
* or if the format was not user-defined in ImageFormat/PixelFormat
* (IMPL_DEFINED is ok)
*
* @hide
*/
public StreamConfiguration(
final int format, final int width, final int height, final boolean input) {
mFormat = checkArgumentFormatInternal(format);
mWidth = checkArgumentPositive(width, "width must be positive");
mHeight = checkArgumentPositive(height, "height must be positive");
mInput = input;
}
/**
* Get the internal image {@code format} in this stream configuration.
*
* @return an integer format
*
* @see ImageFormat
* @see PixelFormat
*/
public final int getFormat() {
return mFormat;
}
/**
* Return the width of the stream configuration.
*
* @return width > 0
*/
public int getWidth() {
return mWidth;
}
/**
* Return the height of the stream configuration.
*
* @return height > 0
*/
public int getHeight() {
return mHeight;
}
/**
* Convenience method to return the size of this stream configuration.
*
* @return a Size with positive width and height
*/
public Size getSize() {
return new Size(mWidth, mHeight);
}
/**
* Determines if this configuration is usable for input streams.
*
* <p>Input and output stream configurations are not interchangeable;
* input stream configurations must be used when configuring inputs.</p>
*
* @return {@code true} if input configuration, {@code false} otherwise
*/
public boolean isInput() {
return mInput;
}
/**
* Determines if this configuration is usable for output streams.
*
* <p>Input and output stream configurations are not interchangeable;
* out stream configurations must be used when configuring outputs.</p>
*
* @return {@code true} if output configuration, {@code false} otherwise
*
* @see CameraDevice#createCaptureSession
*/
public boolean isOutput() {
return !mInput;
}
/**
* Check if this {@link StreamConfiguration} is equal to another {@link StreamConfiguration}.
*
* <p>Two vectors are only equal if and only if each of the respective elements is equal.</p>
*
* @return {@code true} if the objects were equal, {@code false} otherwise
*/
@Override
public boolean equals(final Object obj) {
if (obj == null) {
return false;
}
if (this == obj) {
return true;
}
if (obj instanceof StreamConfiguration) {
final StreamConfiguration other = (StreamConfiguration) obj;
return mFormat == other.mFormat &&
mWidth == other.mWidth &&
mHeight == other.mHeight &&
mInput == other.mInput;
}
return false;
}
/**
* {@inheritDoc}
*/
@Override
public int hashCode() {
return HashCodeHelpers.hashCode(mFormat, mWidth, mHeight, mInput ? 1 : 0);
}
private final int mFormat;
private final int mWidth;
private final int mHeight;
private final boolean mInput;
}
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