Make constants more readable with _ separator

Add an `_` in long constants.
Eg: 10000 => 10_000.

I'm proposing this change because I have had multiple
missread due to confusing the number of 0 in a long number.

More specifically, added an underscore to all number matching:
`final.*\ [0-9]{2,}000;`

PiperOrigin-RevId: 313186920

extensions/opus/src/main/java/com/google/android/exoplayer2/ext/opus/OpusDecoder.java

@@ -36,10 +36,8 @@ import java.util.List;
 
   private static final int DEFAULT_SEEK_PRE_ROLL_SAMPLES = 3840;
 
-  /**
-   * Opus streams are always decoded at 48000 Hz.
-   */
-  private static final int SAMPLE_RATE = 48000;
+  /** Opus streams are always decoded at 48000 Hz. */
+  private static final int SAMPLE_RATE = 48_000;
 
   private static final int NO_ERROR = 0;
   private static final int DECODE_ERROR = -1;

library/core/src/main/java/com/google/android/exoplayer2/DefaultControlDispatcher.java

@@ -19,7 +19,7 @@ package com.google.android.exoplayer2;
 public class DefaultControlDispatcher implements ControlDispatcher {
 
   /** The default fast forward increment, in milliseconds. */
-  public static final int DEFAULT_FAST_FORWARD_MS = 15000;
+  public static final int DEFAULT_FAST_FORWARD_MS = 15_000;
   /** The default rewind increment, in milliseconds. */
   public static final int DEFAULT_REWIND_MS = 5000;
 

library/core/src/main/java/com/google/android/exoplayer2/DefaultLoadControl.java

@@ -32,12 +32,12 @@ public class DefaultLoadControl implements LoadControl {
    * The default minimum duration of media that the player will attempt to ensure is buffered at all
    * times, in milliseconds.
    */
-  public static final int DEFAULT_MIN_BUFFER_MS = 50000;
+  public static final int DEFAULT_MIN_BUFFER_MS = 50_000;
 
   /**
    * The default maximum duration of media that the player will attempt to buffer, in milliseconds.
    */
-  public static final int DEFAULT_MAX_BUFFER_MS = 50000;
+  public static final int DEFAULT_MAX_BUFFER_MS = 50_000;
 
   /**
    * The default duration of media that must be buffered for playback to start or resume following a

library/core/src/main/java/com/google/android/exoplayer2/audio/AudioTrackPositionTracker.java

@@ -127,8 +127,8 @@ import java.lang.reflect.Method;
   private static final long FORCE_RESET_WORKAROUND_TIMEOUT_MS = 200;
 
   private static final int MAX_PLAYHEAD_OFFSET_COUNT = 10;
-  private static final int MIN_PLAYHEAD_OFFSET_SAMPLE_INTERVAL_US = 30000;
-  private static final int MIN_LATENCY_SAMPLE_INTERVAL_US = 500000;
+  private static final int MIN_PLAYHEAD_OFFSET_SAMPLE_INTERVAL_US = 30_000;
+  private static final int MIN_LATENCY_SAMPLE_INTERVAL_US = 50_0000;
 
   private final Listener listener;
   private final long[] playheadOffsets;

library/core/src/main/java/com/google/android/exoplayer2/audio/DefaultAudioSink.java

@@ -198,18 +198,12 @@ public final class DefaultAudioSink implements AudioSink {
     }
   }
 
-  /**
-   * A minimum length for the {@link AudioTrack} buffer, in microseconds.
-   */
-  private static final long MIN_BUFFER_DURATION_US = 250000;
-  /**
-   * A maximum length for the {@link AudioTrack} buffer, in microseconds.
-   */
-  private static final long MAX_BUFFER_DURATION_US = 750000;
-  /**
-   * The length for passthrough {@link AudioTrack} buffers, in microseconds.
-   */
-  private static final long PASSTHROUGH_BUFFER_DURATION_US = 250000;
+  /** A minimum length for the {@link AudioTrack} buffer, in microseconds. */
+  private static final long MIN_BUFFER_DURATION_US = 250_000;
+  /** A maximum length for the {@link AudioTrack} buffer, in microseconds. */
+  private static final long MAX_BUFFER_DURATION_US = 750_000;
+  /** The length for passthrough {@link AudioTrack} buffers, in microseconds. */
+  private static final long PASSTHROUGH_BUFFER_DURATION_US = 250_000;
   /**
    * A multiplication factor to apply to the minimum buffer size requested by the underlying
    * {@link AudioTrack}.

library/core/src/main/java/com/google/android/exoplayer2/source/ProgressiveMediaPeriod.java

@@ -89,7 +89,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
    * When the source's duration is unknown, it is calculated by adding this value to the largest
    * sample timestamp seen when buffering completes.
    */
-  private static final long DEFAULT_LAST_SAMPLE_DURATION_US = 10000;
+  private static final long DEFAULT_LAST_SAMPLE_DURATION_US = 10_000;
 
   private static final Map<String, String> ICY_METADATA_HEADERS = createIcyMetadataHeaders();
 

library/core/src/main/java/com/google/android/exoplayer2/trackselection/AdaptiveTrackSelection.java

@@ -283,9 +283,9 @@ public class AdaptiveTrackSelection extends BaseTrackSelection {
     }
   }
 
-  public static final int DEFAULT_MIN_DURATION_FOR_QUALITY_INCREASE_MS = 10000;
-  public static final int DEFAULT_MAX_DURATION_FOR_QUALITY_DECREASE_MS = 25000;
-  public static final int DEFAULT_MIN_DURATION_TO_RETAIN_AFTER_DISCARD_MS = 25000;
+  public static final int DEFAULT_MIN_DURATION_FOR_QUALITY_INCREASE_MS = 10_000;
+  public static final int DEFAULT_MAX_DURATION_FOR_QUALITY_DECREASE_MS = 25_000;
+  public static final int DEFAULT_MIN_DURATION_TO_RETAIN_AFTER_DISCARD_MS = 25_000;
   public static final float DEFAULT_BANDWIDTH_FRACTION = 0.7f;
   public static final float DEFAULT_BUFFERED_FRACTION_TO_LIVE_EDGE_FOR_QUALITY_INCREASE = 0.75f;
   public static final long DEFAULT_MIN_TIME_BETWEEN_BUFFER_REEVALUTATION_MS = 2000;

library/core/src/main/java/com/google/android/exoplayer2/upstream/DefaultLoadErrorHandlingPolicy.java

@@ -33,7 +33,7 @@ public class DefaultLoadErrorHandlingPolicy implements LoadErrorHandlingPolicy {
    */
   public static final int DEFAULT_MIN_LOADABLE_RETRY_COUNT_PROGRESSIVE_LIVE = 6;
   /** The default duration for which a track is blacklisted in milliseconds. */
-  public static final long DEFAULT_TRACK_BLACKLIST_MS = 60000;
+  public static final long DEFAULT_TRACK_BLACKLIST_MS = 60_000;
 
   private static final int DEFAULT_BEHAVIOR_MIN_LOADABLE_RETRY_COUNT = -1;
 

library/core/src/main/java/com/google/android/exoplayer2/video/VideoFrameReleaseTimeHelper.java

@@ -36,7 +36,7 @@ import com.google.android.exoplayer2.util.Util;
 public final class VideoFrameReleaseTimeHelper {
 
   private static final long CHOREOGRAPHER_SAMPLE_DELAY_MILLIS = 500;
-  private static final long MAX_ALLOWED_DRIFT_NS = 20000000;
+  private static final long MAX_ALLOWED_DRIFT_NS = 20_000_000;
 
   private static final long VSYNC_OFFSET_PERCENTAGE = 80;
   private static final int MIN_FRAMES_FOR_ADJUSTMENT = 6;

library/core/src/main/java/com/google/android/exoplayer2/video/spherical/CameraMotionRenderer.java

@@ -35,7 +35,7 @@ public class CameraMotionRenderer extends BaseRenderer {
 
   private static final String TAG = "CameraMotionRenderer";
   // The amount of time to read samples ahead of the current time.
-  private static final int SAMPLE_WINDOW_DURATION_US = 100000;
+  private static final int SAMPLE_WINDOW_DURATION_US = 100_000;
 
   private final DecoderInputBuffer buffer;
   private final ParsableByteArray scratch;

library/core/src/main/java/com/google/android/exoplayer2/video/spherical/ProjectionDecoder.java

@@ -45,7 +45,7 @@ public final class ProjectionDecoder {
 
   // Sanity limits to prevent a bad file from creating an OOM situation. We don't expect a mesh to
   // exceed these limits.
-  private static final int MAX_COORDINATE_COUNT = 10000;
+  private static final int MAX_COORDINATE_COUNT = 10_000;
   private static final int MAX_VERTEX_COUNT = 32 * 1000;
   private static final int MAX_TRIANGLE_INDICES = 128 * 1000;
 

library/core/src/test/java/com/google/android/exoplayer2/ExoPlayerTest.java

@@ -118,7 +118,7 @@ public final class ExoPlayerTest {
    * milliseconds after starting the player before the test will time out. This is to catch cases
    * where the player under test is not making progress, in which case the test should fail.
    */
-  private static final int TIMEOUT_MS = 10000;
+  private static final int TIMEOUT_MS = 10_000;
 
   private Context context;
   private Timeline dummyTimeline;

library/core/src/test/java/com/google/android/exoplayer2/analytics/AnalyticsCollectorTest.java

@@ -134,7 +134,7 @@ public final class AnalyticsCollectorTest {
   private static final Format VIDEO_FORMAT_DRM_1 =
       ExoPlayerTestRunner.VIDEO_FORMAT.buildUpon().setDrmInitData(DRM_DATA_1).build();
 
-  private static final int TIMEOUT_MS = 10000;
+  private static final int TIMEOUT_MS = 10_000;
   private static final Timeline SINGLE_PERIOD_TIMELINE = new FakeTimeline(/* windowCount= */ 1);
   private static final EventWindowAndPeriodId WINDOW_0 =
       new EventWindowAndPeriodId(/* windowIndex= */ 0, /* mediaPeriodId= */ null);

library/core/src/test/java/com/google/android/exoplayer2/audio/SilenceSkippingAudioProcessorTest.java

@@ -37,7 +37,7 @@ public final class SilenceSkippingAudioProcessorTest {
           /* sampleRate= */ 1000, /* channelCount= */ 2, /* encoding= */ C.ENCODING_PCM_16BIT);
   private static final int TEST_SIGNAL_SILENCE_DURATION_MS = 1000;
   private static final int TEST_SIGNAL_NOISE_DURATION_MS = 1000;
-  private static final int TEST_SIGNAL_FRAME_COUNT = 100000;
+  private static final int TEST_SIGNAL_FRAME_COUNT = 100_000;
 
   private static final int INPUT_BUFFER_SIZE = 100;
 

library/core/src/test/java/com/google/android/exoplayer2/source/ClippingMediaSourceTest.java

@@ -51,8 +51,8 @@ import org.robolectric.annotation.LooperMode.Mode;
 @LooperMode(Mode.PAUSED)
 public final class ClippingMediaSourceTest {
 
-  private static final long TEST_PERIOD_DURATION_US = 1000000;
-  private static final long TEST_CLIP_AMOUNT_US = 300000;
+  private static final long TEST_PERIOD_DURATION_US = 1_000_000;
+  private static final long TEST_CLIP_AMOUNT_US = 300_000;
 
   private Window window;
   private Period period;

library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DashMediaSource.java

@@ -411,7 +411,7 @@ public final class DashMediaSource extends BaseMediaSource {
    * The default presentation delay for live streams. The presentation delay is the duration by
    * which the default start position precedes the end of the live window.
    */
-  public static final long DEFAULT_LIVE_PRESENTATION_DELAY_MS = 30000;
+  public static final long DEFAULT_LIVE_PRESENTATION_DELAY_MS = 30_000;
   /** @deprecated Use {@link #DEFAULT_LIVE_PRESENTATION_DELAY_MS}. */
   @Deprecated
   public static final long DEFAULT_LIVE_PRESENTATION_DELAY_FIXED_MS =
@@ -432,7 +432,7 @@ public final class DashMediaSource extends BaseMediaSource {
   /**
    * The minimum default start position for live streams, relative to the start of the live window.
    */
-  private static final long MIN_LIVE_DEFAULT_START_POSITION_US = 5000000;
+  private static final long MIN_LIVE_DEFAULT_START_POSITION_US = 5_000_000;
 
   private static final String TAG = "DashMediaSource";
 

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mkv/MatroskaExtractor.java

@@ -299,7 +299,7 @@ public class MatroskaExtractor implements Extractor {
    * The value by which to divide a time in microseconds to convert it to the unit of the last value
    * in an SSA timecode (1/100ths of a second).
    */
-  private static final long SSA_TIMECODE_LAST_VALUE_SCALING_FACTOR = 10000;
+  private static final long SSA_TIMECODE_LAST_VALUE_SCALING_FACTOR = 10_000;
   /**
    * The format of an SSA timecode.
    */
@@ -1861,7 +1861,7 @@ public class MatroskaExtractor implements Extractor {
   private static final class Track {
 
     private static final int DISPLAY_UNIT_PIXELS = 0;
-    private static final int MAX_CHROMATICITY = 50000;  // Defined in CTA-861.3.
+    private static final int MAX_CHROMATICITY = 50_000; // Defined in CTA-861.3.
     /**
      * Default max content light level (CLL) that should be encoded into hdrStaticInfo.
      */

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/ogg/DefaultOggSeeker.java

@@ -30,9 +30,9 @@ import java.io.IOException;
 /** Seeks in an Ogg stream. */
 /* package */ final class DefaultOggSeeker implements OggSeeker {
 
-  private static final int MATCH_RANGE = 72000;
-  private static final int MATCH_BYTE_RANGE = 100000;
-  private static final int DEFAULT_OFFSET = 30000;
+  private static final int MATCH_RANGE = 72_000;
+  private static final int MATCH_BYTE_RANGE = 100_000;
+  private static final int DEFAULT_OFFSET = 30_000;
 
   private static final int STATE_SEEK_TO_END = 0;
   private static final int STATE_READ_LAST_PAGE = 1;

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/ogg/OpusReader.java

@@ -32,10 +32,8 @@ import java.util.List;
 
   private static final int DEFAULT_SEEK_PRE_ROLL_SAMPLES = 3840;
 
-  /**
-   * Opus streams are always decoded at 48000 Hz.
-   */
-  private static final int SAMPLE_RATE = 48000;
+  /** Opus streams are always decoded at 48000 Hz. */
+  private static final int SAMPLE_RATE = 48_000;
 
   private static final int OPUS_CODE = 0x4f707573;
   private static final byte[] OPUS_SIGNATURE = {'O', 'p', 'u', 's', 'H', 'e', 'a', 'd'};

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/ts/PsBinarySearchSeeker.java

@@ -35,7 +35,7 @@ import java.io.IOException;
 
   private static final long SEEK_TOLERANCE_US = 100_000;
   private static final int MINIMUM_SEARCH_RANGE_BYTES = 1000;
-  private static final int TIMESTAMP_SEARCH_BYTES = 20000;
+  private static final int TIMESTAMP_SEARCH_BYTES = 20_000;
 
   public PsBinarySearchSeeker(
       TimestampAdjuster scrTimestampAdjuster, long streamDurationUs, long inputLength) {

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/ts/PsDurationReader.java

@@ -39,7 +39,7 @@ import java.io.IOException;
  */
 /* package */ final class PsDurationReader {
 
-  private static final int TIMESTAMP_SEARCH_BYTES = 20000;
+  private static final int TIMESTAMP_SEARCH_BYTES = 20_000;
 
   private final TimestampAdjuster scrTimestampAdjuster;
   private final ParsableByteArray packetBuffer;

library/smoothstreaming/src/main/java/com/google/android/exoplayer2/source/smoothstreaming/SsMediaSource.java

@@ -330,7 +330,7 @@ public final class SsMediaSource extends BaseMediaSource
    * The default presentation delay for live streams. The presentation delay is the duration by
    * which the default start position precedes the end of the live window.
    */
-  public static final long DEFAULT_LIVE_PRESENTATION_DELAY_MS = 30000;
+  public static final long DEFAULT_LIVE_PRESENTATION_DELAY_MS = 30_000;
 
   /**
    * The minimum period between manifest refreshes.
@@ -339,7 +339,7 @@ public final class SsMediaSource extends BaseMediaSource
   /**
    * The minimum default start position for live streams, relative to the start of the live window.
    */
-  private static final long MIN_LIVE_DEFAULT_START_POSITION_US = 5000000;
+  private static final long MIN_LIVE_DEFAULT_START_POSITION_US = 5_000_000;
 
   private final boolean sideloadedManifest;
   private final Uri manifestUri;

testutils/src/main/java/com/google/android/exoplayer2/testutil/DummyMainThread.java

@@ -34,7 +34,7 @@ public final class DummyMainThread {
   }
 
   /** Default timeout value used for {@link #runOnMainThread(Runnable)}. */
-  public static final int TIMEOUT_MS = 10000;
+  public static final int TIMEOUT_MS = 10_000;
 
   private final HandlerThread thread;
   private final Handler handler;

testutils/src/main/java/com/google/android/exoplayer2/testutil/FakeRenderer.java

@@ -46,7 +46,7 @@ public class FakeRenderer extends BaseRenderer {
    * source. A real renderer will typically read ahead by a small amount due to pipelining through
    * decoders and the media output path.
    */
-  private static final long SOURCE_READAHEAD_US = 250000;
+  private static final long SOURCE_READAHEAD_US = 250_000;
 
   private final DecoderInputBuffer buffer;
 

testutils/src/main/java/com/google/android/exoplayer2/testutil/MediaSourceTestRunner.java

@@ -49,7 +49,7 @@ import java.util.concurrent.atomic.AtomicReference;
 /** A runner for {@link MediaSource} tests. */
 public class MediaSourceTestRunner {
 
-  public static final int TIMEOUT_MS = 10000;
+  public static final int TIMEOUT_MS = 10_000;
 
   private final MediaSource mediaSource;
   private final MediaSourceListener mediaSourceListener;

testutils/src/test/java/com/google/android/exoplayer2/testutil/FakeClockTest.java

@@ -33,7 +33,7 @@ import org.robolectric.annotation.LooperMode;
 @LooperMode(LooperMode.Mode.PAUSED)
 public final class FakeClockTest {
 
-  private static final long TIMEOUT_MS = 10000;
+  private static final long TIMEOUT_MS = 10_000;
 
   @Test
   public void currentTimeMillis_withoutBootTime() {