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/*
* Copyright (C) 2015 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 com.android.camera.captureintent.resource;
import com.android.camera.async.MainThread;
import com.android.camera.async.RefCountBase;
import com.android.camera.captureintent.PreviewTransformCalculator;
import com.android.camera.debug.Log;
import com.android.camera.util.Size;
import android.graphics.Matrix;
import android.graphics.SurfaceTexture;
import android.view.Surface;
import javax.annotation.ParametersAreNonnullByDefault;
@ParametersAreNonnullByDefault
public class ResourceSurfaceTextureImpl implements ResourceSurfaceTexture {
private static final Log.Tag TAG = new Log.Tag("ResSurfaceTexture");
private final RefCountBase<ResourceConstructed> mResourceConstructed;
/** The surface texture. */
private final SurfaceTexture mSurfaceTexture;
/** The preview stream size. */
private Size mPreviewSize;
/** The preview layout size. */
private Size mPreviewLayoutSize;
/** The default buffer size in SurfaceTexture. */
private Size mSurfaceTextureDefaultBufferSize;
private final PreviewTransformCalculator mPreviewTransformCalculator;
/**
* Creates a reference counted {@link ResourceSurfaceTextureImpl} object.
*/
public static RefCountBase<ResourceSurfaceTexture> create(
RefCountBase<ResourceConstructed> resourceConstructed,
SurfaceTexture surfaceTexture) {
ResourceSurfaceTexture resourceSurfaceTexture = new ResourceSurfaceTextureImpl(
resourceConstructed,
surfaceTexture,
new PreviewTransformCalculator(resourceConstructed.get().getOrientationManager()));
return new RefCountBase<>(resourceSurfaceTexture);
}
protected ResourceSurfaceTextureImpl(
RefCountBase<ResourceConstructed> resourceConstructed,
SurfaceTexture surfaceTexture,
PreviewTransformCalculator previewTransformCalculator) {
mResourceConstructed = resourceConstructed;
mResourceConstructed.addRef();
mSurfaceTexture = surfaceTexture;
mPreviewTransformCalculator = previewTransformCalculator;
mPreviewSize = new Size(0, 0);
mPreviewLayoutSize = new Size(0, 0);
mSurfaceTextureDefaultBufferSize = new Size(0, 0);
}
public RefCountBase<ResourceConstructed> getResourceConstructed() {
return mResourceConstructed;
}
@Override
public Surface createPreviewSurface() {
return new Surface(mSurfaceTexture);
}
@Override
public Size getPreviewSize() {
return mPreviewSize;
}
@Override
public Size getPreviewLayoutSize() {
return mPreviewLayoutSize;
}
@Override
public void setPreviewSize(Size previewSize) {
// Update preview transform when preview stream size is changed.
if (!mPreviewSize.equals(previewSize)) {
mPreviewSize = previewSize;
/**
* Update transform here since preview size might change when
* switching between back and front camera.
*/
mResourceConstructed.get().getMainThread().execute(new Runnable() {
@Override
public void run() {
updatePreviewTransform();
}
});
}
// Update surface texture's default buffer size. See b/17286155.
mSurfaceTexture.setDefaultBufferSize(mPreviewSize.width(), mPreviewSize.height());
}
@Override
public void setPreviewLayoutSize(Size previewLayoutSize) {
MainThread.checkMainThread();
// Update preview transform when preview layout size is changed.
if (!mPreviewLayoutSize.equals(previewLayoutSize)) {
mPreviewLayoutSize = previewLayoutSize;
updatePreviewTransform();
}
}
/**
* Updates the default buffer size in SurfaceTexture with the configured
* preview stream size.
*/
protected void updateSurfaceTextureDefaultBufferSize(Size defaultBufferSize) {
mSurfaceTexture.setDefaultBufferSize(defaultBufferSize.width(), defaultBufferSize.height());
}
@Override
public void updatePreviewTransform() {
MainThread.checkMainThread();
if (mPreviewSize.getWidth() == 0 || mPreviewSize.getHeight() == 0) {
Log.w(TAG, "Do nothing since mPreviewSize is 0");
return;
}
if (mPreviewLayoutSize.getWidth() == 0 || mPreviewLayoutSize.getHeight() == 0) {
Log.w(TAG, "Do nothing since mPreviewLayoutSize is 0");
return;
}
Matrix transformMatrix = mPreviewTransformCalculator.toTransformMatrix(
mPreviewLayoutSize, mPreviewSize);
mResourceConstructed.get().getModuleUI().updatePreviewTransform(transformMatrix);
}
@Override
public void close() {
mResourceConstructed.close();
}
}
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