HDR: Update gamma comments to linear.

Comment-only change.

PiperOrigin-RevId: 476873286
(cherry picked from commit 16dca182)

demos/transformer/src/main/java/androidx/media3/demo/transformer/BitmapOverlayProcessor.java

@@ -67,7 +67,7 @@ import java.util.Locale;
    *
    * @param context The {@link Context}.
    * @param useHdr Whether input textures come from an HDR source. If {@code true}, colors will be
-   *     in linear RGB BT.2020. If {@code false}, colors will be in gamma RGB BT.709.
+   *     in linear RGB BT.2020. If {@code false}, colors will be in linear RGB BT.709.
    * @throws FrameProcessingException If a problem occurs while reading shader files.
    */
   public BitmapOverlayProcessor(Context context, boolean useHdr) throws FrameProcessingException {

demos/transformer/src/main/java/androidx/media3/demo/transformer/PeriodicVignetteProcessor.java

@@ -53,7 +53,7 @@ import java.io.IOException;
    *
    * @param context The {@link Context}.
    * @param useHdr Whether input textures come from an HDR source. If {@code true}, colors will be
-   *     in linear RGB BT.2020. If {@code false}, colors will be in gamma RGB BT.709.
+   *     in linear RGB BT.2020. If {@code false}, colors will be in linear RGB BT.709.
    * @param centerX The x-coordinate of the center of the effect.
    * @param centerY The y-coordinate of the center of the effect.
    * @param minInnerRadius The lower bound of the radius that is unaffected by the effect.

demos/transformer/src/withMediaPipe/java/androidx/media3/demo/transformer/MediaPipeProcessor.java

@@ -85,7 +85,7 @@ import java.util.concurrent.Future;
    *
    * @param context The {@link Context}.
    * @param useHdr Whether input textures come from an HDR source. If {@code true}, colors will be
-   *     in linear RGB BT.2020. If {@code false}, colors will be in gamma RGB BT.709.
+   *     in linear RGB BT.2020. If {@code false}, colors will be in linear RGB BT.709.
    * @param graphName Name of a MediaPipe graph asset to load.
    * @param isSingleFrameGraph Whether the MediaPipe graph will eventually produce one output frame
    *     each time an input frame (and no other input) has been queued.

libraries/effect/src/main/java/androidx/media3/effect/ColorLutProcessor.java

@@ -41,7 +41,7 @@ import java.io.IOException;
    * @param context The {@link Context}.
    * @param colorLut The {@link ColorLut} to apply to each frame in order.
    * @param useHdr Whether input textures come from an HDR source. If {@code true}, colors will be
-   *     in linear RGB BT.2020. If {@code false}, colors will be in gamma RGB BT.709.
+   *     in linear RGB BT.2020. If {@code false}, colors will be in linear RGB BT.709.
    * @throws FrameProcessingException If a problem occurs while reading shader files.
    */
   public ColorLutProcessor(Context context, ColorLut colorLut, boolean useHdr)

libraries/effect/src/main/java/androidx/media3/effect/ContrastProcessor.java

@@ -38,7 +38,7 @@ import java.io.IOException;
    * @param context The {@link Context}.
    * @param contrastEffect The {@link Contrast} to apply to each frame in order.
    * @param useHdr Whether input textures come from an HDR source. If {@code true}, colors will be
-   *     in linear RGB BT.2020. If {@code false}, colors will be in gamma RGB BT.709.
+   *     in linear RGB BT.2020. If {@code false}, colors will be in linear RGB BT.709.
    * @throws FrameProcessingException If a problem occurs while reading shader files.
    */
   public ContrastProcessor(Context context, Contrast contrastEffect, boolean useHdr)

libraries/effect/src/main/java/androidx/media3/effect/GlEffect.java

@@ -35,7 +35,7 @@ public interface GlEffect extends Effect {
    *
    * @param context A {@link Context}.
    * @param useHdr Whether input textures come from an HDR source. If {@code true}, colors will be
-   *     in linear RGB BT.2020. If {@code false}, colors will be in gamma RGB BT.709.
+   *     in linear RGB BT.2020. If {@code false}, colors will be in linear RGB BT.709.
    */
   GlTextureProcessor toGlTextureProcessor(Context context, boolean useHdr)
       throws FrameProcessingException;

libraries/effect/src/main/java/androidx/media3/effect/HslProcessor.java

@@ -40,7 +40,7 @@ import java.io.IOException;
    * @param context The {@link Context}.
    * @param hslAdjustment The {@link HslAdjustment} to apply to each frame in order.
    * @param useHdr Whether input textures come from an HDR source. If {@code true}, colors will be
-   *     in linear RGB BT.2020. If {@code false}, colors will be in gamma RGB BT.709.
+   *     in linear RGB BT.2020. If {@code false}, colors will be in linear RGB BT.709.
    * @throws FrameProcessingException If a problem occurs while reading shader files.
    */
   public HslProcessor(Context context, HslAdjustment hslAdjustment, boolean useHdr)

libraries/effect/src/main/java/androidx/media3/effect/MatrixTextureProcessor.java

@@ -50,7 +50,6 @@ import java.util.List;
  *
  * <p>Can copy frames from an external texture and apply color transformations for HDR if needed.
  */
-// TODO(b/241902517): Fix Gamma references since intermediate color space is now linear.
 @UnstableApi
 @SuppressWarnings("FunctionalInterfaceClash") // b/228192298
 /* package */ final class MatrixTextureProcessor extends SingleFrameGlTextureProcessor
@@ -132,8 +131,8 @@ import java.util.List;
   /**
    * Creates a new instance.
    *
-   * <p>Input and output are both intermediate optical colors, which are linear RGB BT.2020 if
-   * {@code useHdr} is {@code true} and gamma RGB BT.709 if not.
+   * <p>Input and output are both intermediate optical/linear colors, and RGB BT.2020 if {@code
+   * useHdr} is {@code true} and RGB BT.709 if not.
    *
    * @param context The {@link Context}.
    * @param matrixTransformations The {@link GlMatrixTransformation GlMatrixTransformations} to
@@ -174,8 +173,8 @@ import java.util.List;
    * intermediate optical {@link GlTextureProcessor} color output, before {@code
    * matrixTransformations} and {@code rgbMatrices} are applied.
    *
-   * <p>Intermediate optical colors are linear RGB BT.2020 if {@code electricalColorInfo} is
-   * {@linkplain ColorInfo#isTransferHdr(ColorInfo) HDR}, and gamma RGB BT.709 if not.
+   * <p>Intermediate optical/linear colors are RGB BT.2020 if {@code electricalColorInfo} is
+   * {@linkplain ColorInfo#isTransferHdr(ColorInfo) HDR}, and RGB BT.709 if not.
    *
    * @param context The {@link Context}.
    * @param matrixTransformations The {@link GlMatrixTransformation GlMatrixTransformations} to
@@ -235,8 +234,8 @@ import java.util.List;
    * GlTextureProcessor} color input, to electrical color output, after {@code
    * matrixTransformations} and {@code rgbMatrices} are applied.
    *
-   * <p>Intermediate optical colors are linear RGB BT.2020 if {@code electricalColorInfo} is
-   * {@linkplain ColorInfo#isTransferHdr(ColorInfo) HDR}, and gamma RGB BT.709 if not.
+   * <p>Intermediate optical/linear colors are RGB BT.2020 if {@code electricalColorInfo} is
+   * {@linkplain ColorInfo#isTransferHdr(ColorInfo) HDR}, and RGB BT.709 if not.
    *
    * @param context The {@link Context}.
    * @param matrixTransformations The {@link GlMatrixTransformation GlMatrixTransformations} to

libraries/effect/src/main/java/androidx/media3/effect/RgbMatrix.java

@@ -33,7 +33,7 @@ public interface RgbMatrix extends GlEffect {
    *
    * @param presentationTimeUs The timestamp of the frame to apply the matrix on.
    * @param useHdr If {@code true}, colors will be in linear RGB BT.2020. If {@code false}, colors
-   *     will be in gamma RGB BT.709. Must be consistent with {@code useHdr} in {@link
+   *     will be in linear RGB BT.709. Must be consistent with {@code useHdr} in {@link
    *     #toGlTextureProcessor(Context, boolean)}.
    * @return The {@code RgbMatrix} to apply to the frame.
    */

libraries/effect/src/main/java/androidx/media3/effect/SingleFrameGlTextureProcessor.java

@@ -52,7 +52,7 @@ public abstract class SingleFrameGlTextureProcessor implements GlTextureProcesso
    * Creates a {@code SingleFrameGlTextureProcessor} instance.
    *
    * @param useHdr Whether input textures come from an HDR source. If {@code true}, colors will be
-   *     in linear RGB BT.2020. If {@code false}, colors will be in gamma RGB BT.709.
+   *     in linear RGB BT.2020. If {@code false}, colors will be in linear RGB BT.709.
    */
   public SingleFrameGlTextureProcessor(boolean useHdr) {
     this.useHdr = useHdr;