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properly capture images at 4:3 ratio

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tibbi
2016-06-29 16:21:37 +02:00
parent ac77afd80c
commit 43c1aa6aec
1 changed files with 37 additions and 33 deletions
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70
app/src/main/java/com/simplemobiletools/camera/Preview.java
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@@ -53,8 +53,9 @@ public class Preview extends ViewGroup implements SurfaceHolder.Callback, View.O
private static boolean mIsSurfaceCreated;
private static boolean mSwitchToVideoAsap;
private static boolean mIsVideoCaptureIntent;
private static boolean mFocusBeforeCapture;
private static boolean mSetupPreviewAfterMeasure;
private static boolean mFocusBeforeCapture;
private static boolean mForceAspectRatio;
private static int mLastClickX;
private static int mLastClickY;
private static int mInitVideoRotation;
@@ -149,7 +150,9 @@ public class Preview extends ViewGroup implements SurfaceHolder.Callback, View.O
final boolean isLongTapEnabled = Config.newInstance(getContext()).getLongTapEnabled();
mSurfaceView.setOnLongClickListener(isLongTapEnabled ? this : null);
mFocusBeforeCapture = Config.newInstance(getContext()).getFocusBeforeCaptureEnabled();
final Config config = Config.newInstance(getContext());
mFocusBeforeCapture = config.getFocusBeforeCaptureEnabled();
mForceAspectRatio = config.getForceRatioEnabled();
return true;
}
@@ -259,8 +262,8 @@ public class Preview extends ViewGroup implements SurfaceHolder.Callback, View.O
Camera.Size maxSize = sizes.get(0);
for (Camera.Size size : sizes) {
final boolean isEightMegapixelsMax = isEightMegapixelsMax(size);
final boolean isSixteenToNine = isSixteenToNine(size);
if (isEightMegapixelsMax && isSixteenToNine) {
final boolean isProperRatio = isProperRatio(size);
if (isEightMegapixelsMax && isProperRatio) {
maxSize = size;
break;
}
@@ -272,9 +275,11 @@ public class Preview extends ViewGroup implements SurfaceHolder.Callback, View.O
return size.width * size.height < 9000000;
}
private boolean isSixteenToNine(Camera.Size size) {
private boolean isProperRatio(Camera.Size size) {
final float currRatio = (float) size.height / size.width;
final float wantedRatio = (float) 9 / 16;
float wantedRatio = (float) 3 / 4;
if (mForceAspectRatio)
wantedRatio = (float) 9 / 16;
final float diff = Math.abs(currRatio - wantedRatio);
return diff < RATIO_TOLERANCE;
}
@@ -283,7 +288,7 @@ public class Preview extends ViewGroup implements SurfaceHolder.Callback, View.O
final List<Camera.Size> sizes = mParameters.getSupportedVideoSizes();
Camera.Size maxSize = sizes.get(0);
for (Camera.Size size : sizes) {
final boolean isSixteenToNine = isSixteenToNine(size);
final boolean isSixteenToNine = isProperRatio(size);
if (isSixteenToNine) {
maxSize = size;
break;
@@ -426,35 +431,23 @@ public class Preview extends ViewGroup implements SurfaceHolder.Callback, View.O
}
private Camera.Size getOptimalPreviewSize(List<Camera.Size> sizes, int width, int height) {
final double ASPECT_TOLERANCE = 0.1;
double targetRatio = (double) height / width;
if (sizes == null)
return null;
Camera.Size optimalSize = null;
double minDiff = Double.MAX_VALUE;
Camera.Size result = null;
for (Camera.Size size : sizes) {
double ratio = (double) size.width / size.height;
if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE)
continue;
if (Math.abs(size.height - height) < minDiff) {
optimalSize = size;
minDiff = Math.abs(size.height - height);
if (size.width <= width && size.height <= height) {
if (result == null) {
result = size;
} else {
int resultArea = result.width * result.height;
int newArea = size.width * size.height;
if (newArea > resultArea) {
result = size;
}
}
}
}
if (optimalSize == null) {
minDiff = Double.MAX_VALUE;
for (Camera.Size size : sizes) {
if (Math.abs(size.height - height) < minDiff) {
optimalSize = size;
minDiff = Math.abs(size.height - height);
}
}
}
return optimalSize;
return result;
}
@Override
@@ -462,13 +455,24 @@ public class Preview extends ViewGroup implements SurfaceHolder.Callback, View.O
setMeasuredDimension(mScreenSize.x, mScreenSize.y);
if (mSupportedPreviewSizes != null) {
mPreviewSize = getOptimalPreviewSize(mSupportedPreviewSizes, mScreenSize.x, mScreenSize.y);
// for simplicity lets assume that most displays are 16:9 and the remaining ones are 4:3
if (mForceAspectRatio) {
mPreviewSize = getOptimalPreviewSize(mSupportedPreviewSizes, mScreenSize.y, mScreenSize.x);
} else {
final int newRatioHeight = (int) (mScreenSize.x * ((double) 4 / 3));
setMeasuredDimension(mScreenSize.x, newRatioHeight);
mPreviewSize = getOptimalPreviewSize(mSupportedPreviewSizes, newRatioHeight, mScreenSize.x);
}
final LayoutParams lp = mSurfaceView.getLayoutParams();
if (mScreenSize.x > mPreviewSize.height) {
final float ratio = (float) mScreenSize.x / mPreviewSize.height;
lp.width = (int) (mPreviewSize.height * ratio);
if (mForceAspectRatio) {
lp.height = mScreenSize.y;
} else {
lp.height = (int) (mPreviewSize.width * ratio);
}
} else {
lp.width = mPreviewSize.height;
lp.height = mPreviewSize.width;