FrameProcessor: Add checks to ensure width and height are positive.

Negative and zero values should be disallowed.

PiperOrigin-RevId: 441757246

library/transformer/src/main/java/com/google/android/exoplayer2/transformer/AdvancedFrameProcessor.java

@@ -167,6 +167,9 @@ public final class AdvancedFrameProcessor implements GlFrameProcessor {
 
   @Override
   public void initialize(int inputTexId, int inputWidth, int inputHeight) throws IOException {
+    checkArgument(inputWidth > 0, "inputWidth must be positive");
+    checkArgument(inputHeight > 0, "inputHeight must be positive");
+
     size = new Size(inputWidth, inputHeight);
     // TODO(b/205002913): check the loaded program is consistent with the attributes and uniforms
     //  expected in the code.

library/transformer/src/main/java/com/google/android/exoplayer2/transformer/ExternalCopyFrameProcessor.java

@@ -15,6 +15,7 @@
  */
 package com.google.android.exoplayer2.transformer;
 
+import static com.google.android.exoplayer2.util.Assertions.checkArgument;
 import static com.google.android.exoplayer2.util.Assertions.checkStateNotNull;
 
 import android.content.Context;
@@ -61,6 +62,9 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
 
   @Override
   public void initialize(int inputTexId, int inputWidth, int inputHeight) throws IOException {
+    checkArgument(inputWidth > 0, "inputWidth must be positive");
+    checkArgument(inputHeight > 0, "inputHeight must be positive");
+
     size = new Size(inputWidth, inputHeight);
     // TODO(b/205002913): check the loaded program is consistent with the attributes and uniforms
     //  expected in the code.

library/transformer/src/main/java/com/google/android/exoplayer2/transformer/FrameProcessorChain.java

@@ -15,6 +15,7 @@
  */
 package com.google.android.exoplayer2.transformer;
 
+import static com.google.android.exoplayer2.util.Assertions.checkArgument;
 import static com.google.android.exoplayer2.util.Assertions.checkNotNull;
 import static com.google.android.exoplayer2.util.Assertions.checkState;
 import static com.google.android.exoplayer2.util.Assertions.checkStateNotNull;
@@ -86,6 +87,9 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
       List<GlFrameProcessor> frameProcessors,
       boolean enableExperimentalHdrEditing)
       throws TransformationException {
+    checkArgument(inputWidth > 0, "inputWidth must be positive");
+    checkArgument(inputHeight > 0, "inputHeight must be positive");
+
     if (pixelWidthHeightRatio != 1.0f) {
       // TODO(b/211782176): Consider implementing support for non-square pixels.
       throw TransformationException.createForFrameProcessorChain(

library/transformer/src/main/java/com/google/android/exoplayer2/transformer/PresentationFrameProcessor.java

@@ -282,6 +282,7 @@ public final class PresentationFrameProcessor implements GlFrameProcessor {
   /* package */ void configureOutputSizeAndTransformationMatrix(int inputWidth, int inputHeight) {
     checkArgument(inputWidth > 0, "inputWidth must be positive");
     checkArgument(inputHeight > 0, "inputHeight must be positive");
+
     transformationMatrix = new Matrix();
     outputWidth = inputWidth;
     outputHeight = inputHeight;

library/transformer/src/main/java/com/google/android/exoplayer2/transformer/ScaleToFitFrameProcessor.java

@@ -15,6 +15,7 @@
  */
 package com.google.android.exoplayer2.transformer;
 
+import static com.google.android.exoplayer2.util.Assertions.checkArgument;
 import static com.google.android.exoplayer2.util.Assertions.checkStateNotNull;
 import static java.lang.Math.max;
 import static java.lang.Math.min;
@@ -146,6 +147,9 @@ public final class ScaleToFitFrameProcessor implements GlFrameProcessor {
   @EnsuresNonNull("adjustedTransformationMatrix")
   @VisibleForTesting // Allows robolectric testing of output size calculation without OpenGL.
   /* package */ void configureOutputSizeAndTransformationMatrix(int inputWidth, int inputHeight) {
+    checkArgument(inputWidth > 0, "inputWidth must be positive");
+    checkArgument(inputHeight > 0, "inputHeight must be positive");
+
     adjustedTransformationMatrix = new Matrix(transformationMatrix);
 
     if (transformationMatrix.isIdentity()) {