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Expose MssimCaluclator for use in Duetdev tests

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PiperOrigin-RevId: 524876651
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Googler 2023-04-17 18:03:00 +01:00 committed by Rohit Singh
parent 6f4fca8cbf
commit ffa969f97c
1 changed files with 5 additions and 2 deletions
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7
libraries/transformer/src/main/java/androidx/media3/transformer/MssimCalculator.java
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@ -17,6 +17,8 @@ package androidx.media3.transformer;
import static java.lang.Math.pow; import static java.lang.Math.pow;
import androidx.media3.common.util.UnstableApi;
/** /**
* Image comparison tool that calculates the Mean Structural Similarity (MSSIM) of two images, * Image comparison tool that calculates the Mean Structural Similarity (MSSIM) of two images,
* developed by Wang, Bovik, Sheikh, and Simoncelli. * developed by Wang, Bovik, Sheikh, and Simoncelli.
@ -25,7 +27,8 @@ import static java.lang.Math.pow;
* *
* <p>See <a href=https://ece.uwaterloo.ca/~z70wang/publications/ssim.pdf>the SSIM paper</a>. * <p>See <a href=https://ece.uwaterloo.ca/~z70wang/publications/ssim.pdf>the SSIM paper</a>.
*/ */
/* package */ final class MssimCalculator { @UnstableApi
public final class MssimCalculator {
// Referred to as 'L' in the SSIM paper, this constant defines the maximum pixel values. The // Referred to as 'L' in the SSIM paper, this constant defines the maximum pixel values. The
// range of pixel values is 0 to 255 (8 bit unsigned range). // range of pixel values is 0 to 255 (8 bit unsigned range).
private static final int PIXEL_MAX_VALUE = 255; private static final int PIXEL_MAX_VALUE = 255;
@ -47,7 +50,7 @@ import static java.lang.Math.pow;
/** /**
* Calculates the Mean Structural Similarity (MSSIM) between two images with window skipping. * Calculates the Mean Structural Similarity (MSSIM) between two images with window skipping.
* *
* @see #calculate(byte[], byte[], int, int, boolean). * @see #calculate(byte[], byte[], int, int, boolean)
*/ */
public static double calculate( public static double calculate(
byte[] referenceBuffer, byte[] distortedBuffer, int width, int height) { byte[] referenceBuffer, byte[] distortedBuffer, int width, int height) {