Remove outdated SDK references

libraries/common/src/main/java/androidx/media3/common/util/Util.java

@@ -3719,7 +3719,7 @@ public static long sum(long... summands) {
    * Returns a {@link Drawable} for the given resource or throws a {@link
    * Resources.NotFoundException} if not found.
    *
-   * @param context The context to get the theme from starting with API 21.
+   * @param context The context to get the theme from.
    * @param resources The resources to load the drawable from.
    * @param drawableRes The drawable resource int.
    * @return The loaded {@link Drawable}.

libraries/datasource/src/androidTest/java/androidx/media3/datasource/MediaDataSourceAdapterContractTest.java

@@ -23,15 +23,13 @@
 import androidx.media3.test.utils.DataSourceContractTest;
 import androidx.media3.test.utils.TestUtil;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
-import androidx.test.filters.SdkSuppress;
 import com.google.common.collect.ImmutableList;
 import org.junit.Ignore;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
 /** {@link DataSource} contract tests for {@link MediaDataSourceAdapter}. */
 @RunWith(AndroidJUnit4.class)
-@SdkSuppress(minSdkVersion = 23)
 public class MediaDataSourceAdapterContractTest extends DataSourceContractTest {
 
   private static final byte[] DATA = TestUtil.buildTestData(20);

libraries/exoplayer/src/androidTest/java/androidx/media3/exoplayer/ClippedPlaybackTest.java

@@ -36,7 +36,6 @@
 import androidx.media3.exoplayer.source.DefaultMediaSourceFactory;
 import androidx.media3.exoplayer.text.TextOutput;
 import androidx.media3.exoplayer.text.TextRenderer;
-import androidx.test.filters.SdkSuppress;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.Iterables;
 import java.util.ArrayList;
@@ -109,8 +108,6 @@ public void subtitlesRespectClipping_singlePeriod() throws Exception {
   }
 
   @Test
-  // TODO: b/399815346 - This test is flaky on API 21 even when parsing subtitles during extraction.
-  @SdkSuppress(minSdkVersion = 22)
   public void subtitlesRespectClipping_multiplePeriods() throws Exception {
     // Parsing subtitles during rendering is flaky (see comment above), so restrict that
     // configuration to a single API level to reduce the chance of seeing a flaky failure.

libraries/exoplayer/src/androidTest/java/androidx/media3/exoplayer/ExoPlayerBinderStressTest.java

@@ -27,7 +27,6 @@
 import androidx.media3.test.utils.TestUtil;
 import androidx.test.core.app.ApplicationProvider;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
-import androidx.test.filters.SdkSuppress;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
@@ -36,7 +35,6 @@
  * verifying that no binder calls happen on the ExoPlayer main thread.
  */
 @RunWith(AndroidJUnit4.class)
-@SdkSuppress(minSdkVersion = 23)
 public class ExoPlayerBinderStressTest {
 
   @Test

libraries/exoplayer/src/androidTest/java/androidx/media3/exoplayer/MediaExtractorCompatTest.java

@@ -1140,7 +1140,6 @@ public void getPsshInfo_withMediaHavingPsshData_returnsCorrectPsshMap() throws I
   }
 
   @Test
-  @SdkSuppress(minSdkVersion = 23)
   public void getTrackFormat_withProfileAndLevelInCodecString_returnsExpectedProfileAndLevel()
       throws IOException {
     fakeExtractor.addReadAction(

libraries/exoplayer/src/androidTest/java/androidx/media3/exoplayer/MediaExtractorContractTest.java

@@ -155,7 +155,6 @@ public void setDataSource_withFileDescriptorOffsetAndLength_returnsCorrectTrackC
   }
 
   @Test
-  @SdkSuppress(minSdkVersion = 23)
   public void setDataSource_withMediaDataSource_returnsCorrectTrackCount() throws IOException {
     byte[] fileData = TestUtil.getByteArray(context, /* fileName= */ "media/mp4/sample.mp4");
     MediaDataSource mediaDataSource =

libraries/exoplayer/src/androidTest/java/androidx/media3/exoplayer/source/preload/DefaultPreloadManagerBinderStressTest.java

@@ -30,7 +30,6 @@
 import androidx.media3.test.utils.TestUtil;
 import androidx.test.core.app.ApplicationProvider;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
-import androidx.test.filters.SdkSuppress;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
@@ -40,7 +39,6 @@
  * main thread.
  */
 @RunWith(AndroidJUnit4.class)
-@SdkSuppress(minSdkVersion = 23)
 public class DefaultPreloadManagerBinderStressTest {
 
   @Test

libraries/exoplayer/src/main/java/androidx/media3/exoplayer/ExoPlayer.java

@@ -1453,8 +1453,7 @@ void setMediaSources(
   /**
    * Sets the ID of the audio session to attach to the underlying {@link android.media.AudioTrack}.
    *
-   * <p>The audio session ID can be generated using {@link Util#generateAudioSessionIdV21(Context)}
-   * for API 21+.
+   * <p>The audio session ID can be generated using {@link Util#generateAudioSessionIdV21(Context)}.
    *
    * @param audioSessionId The audio session ID, or {@link C#AUDIO_SESSION_ID_UNSET} if it should be
    *     generated by the framework.

libraries/exoplayer/src/main/java/androidx/media3/exoplayer/audio/AudioCapabilities.java

@@ -462,7 +462,7 @@ private static boolean isBluetoothConnected(
    * AudioDeviceInfo#getType()}.
    *
    * <p>The types {@link AudioDeviceInfo#TYPE_BLUETOOTH_A2DP} and {@link
-   * AudioDeviceInfo#TYPE_BLUETOOTH_SCO} are included from API 23. And the types {@link
+   * AudioDeviceInfo#TYPE_BLUETOOTH_SCO} are included by default. And the types {@link
    * AudioDeviceInfo#TYPE_BLE_HEADSET} and {@link AudioDeviceInfo#TYPE_BLE_SPEAKER} are added from
    * API 31. And the type {@link AudioDeviceInfo#TYPE_BLE_BROADCAST} is added from API 33.
    */

libraries/exoplayer/src/main/java/androidx/media3/exoplayer/video/MediaCodecVideoRenderer.java

@@ -1547,8 +1547,6 @@ protected DecoderReuseEvaluation onInputFormatChanged(FormatHolder formatHolder)
   /**
    * Called immediately before an input buffer is queued into the codec.
    *
-   * <p>In tunneling mode for pre Marshmallow, the buffer is treated as if immediately output.
-   *
    * @param buffer The buffer to be queued.
    * @throws ExoPlaybackException Thrown if an error occurs handling the input buffer.
    */

libraries/exoplayer/src/test/java/androidx/media3/exoplayer/audio/AudioCapabilitiesTest.java

@@ -139,7 +139,6 @@ public void getCapabilities_returnsCapabilitiesFromDirectProfiles_onTvV33() {
         .isFalse();
   }
 
-  /** {@link AudioDeviceInfo#TYPE_BLUETOOTH_A2DP} is only supported from API 23. */
   @Test
   @Config(minSdk = Config.OLDEST_SDK)
   public void getCapabilities_withBluetoothA2dpAndHdmiConnected_returnsDefaultCapabilities() {
@@ -292,7 +291,7 @@ public void getCapabilities_noBluetoothButHdmiConnected_returnsHdmiCapabilities(
   }
 
   @Test
-  @Config(minSdk = Config.OLDEST_SDK) // TYPE_BLUETOOTH_A2DP detection is supported from API 23.
+  @Config(minSdk = Config.OLDEST_SDK)
   public void
       getCapabilities_withBluetoothA2dpConnectedAndHdmiAsRoutedDeviceHint_returnsHdmiCapabilities() {
     setOutputDevices(AudioDeviceInfo.TYPE_BLUETOOTH_A2DP, AudioDeviceInfo.TYPE_HDMI);

libraries/exoplayer/src/test/java/androidx/media3/exoplayer/audio/DefaultAudioSinkTest.java

@@ -446,7 +446,7 @@ public void audioSinkWithNullContext_audioCapabilitiesObtainedFromBuilder_defaul
   }
 
   @Test
-  @Config(minSdk = Config.OLDEST_SDK) // AudioManager.TYPE_BLUETOOTH_A2DP is supported from API 23.
+  @Config(minSdk = Config.OLDEST_SDK)
   public void bluetoothDeviceAddedAndRemoved_audioCapabilitiesUpdated() {
     // Set UI mode to TV.
     getShadowUiModeManager().setCurrentModeType(Configuration.UI_MODE_TYPE_TELEVISION);
@@ -488,8 +488,7 @@ public void bluetoothDeviceAddedAndRemoved_audioCapabilitiesUpdated() {
   }
 
   @Test
-  @Config(
-      minSdk = Config.OLDEST_SDK) // AudioManager.ACTION_HDMI_AUDIO_PLUG is supported from API 21.
+  @Config(minSdk = Config.OLDEST_SDK)
   public void hdmiDeviceAddedAndRemoved_audioCapabilitiesUpdated() {
     // Set UI mode to TV.
     getShadowUiModeManager().setCurrentModeType(Configuration.UI_MODE_TYPE_TELEVISION);
@@ -577,9 +576,7 @@ public void setAudioAttributes_audioCapabilitiesUpdated() {
   // Adding the permission to the test AndroidManifest.xml doesn't work to appease lint.
   @SuppressWarnings({"StickyBroadcast", "MissingPermission"})
   @Test
-  @Config(
-      minSdk = Config.OLDEST_SDK,
-      maxSdk = 32) // AudioManager.TYPE_BLUETOOTH_A2DP is supported from API 23.
+  @Config(minSdk = Config.OLDEST_SDK, maxSdk = 32)
   public void setPreferredDevice_audioCapabilitiesUpdated() {
     // Initially setup the audio sink with Bluetooth and HDMI device connected.
     AudioDeviceInfo hdmiDevice =
@@ -660,7 +657,7 @@ public void onRoutingChanged_onActiveAudioTrack_audioCapabilitiesUpdated() throw
   }
 
   @Test
-  @Config(minSdk = Config.OLDEST_SDK) // AudioManager.TYPE_BLUETOOTH_A2DP is supported from API 23.
+  @Config(minSdk = Config.OLDEST_SDK)
   public void afterRelease_bluetoothDeviceAdded_audioCapabilitiesShouldNotBeUpdated() {
     // Set UI mode to TV.
     getShadowUiModeManager().setCurrentModeType(Configuration.UI_MODE_TYPE_TELEVISION);
@@ -691,8 +688,7 @@ public void afterRelease_bluetoothDeviceAdded_audioCapabilitiesShouldNotBeUpdate
   }
 
   @Test
-  @Config(
-      minSdk = Config.OLDEST_SDK) // AudioManager.ACTION_HDMI_AUDIO_PLUG is supported from API 21.
+  @Config(minSdk = Config.OLDEST_SDK)
   public void afterRelease_hdmiDeviceAdded_audioCapabilitiesShouldNotBeUpdated() {
     // Set UI mode to TV.
     getShadowUiModeManager().setCurrentModeType(Configuration.UI_MODE_TYPE_TELEVISION);

libraries/session/src/main/java/androidx/media3/session/MediaButtonReceiver.java

@@ -255,10 +255,9 @@ protected void onForegroundServiceStartNotAllowedException(
    * Intent#ACTION_MEDIA_BUTTON}. If this happens on API 31+ and the app is in the background then
    * an exception is thrown.
    *
-   * <p>With the exception of devices that are running API 20 and below, a media button intent is
-   * only required to be sent to this receiver for a Bluetooth media button event that wants to
-   * restart the service. In such a case the app gets an exemption and is allowed to start the
-   * foreground service. In this case this method will never be called.
+   * <p>A media button intent is only required to be sent to this receiver for a Bluetooth media
+   * button event that wants to restart the service. In such a case the app gets an exemption and is
+   * allowed to start the foreground service. In this case this method will never be called.
    *
    * <p>In all other cases of attempting to start a Media3 service or to send a media button event,
    * apps must use a {@link MediaBrowser} or {@link MediaController} to bind to the service instead

libraries/session/src/main/java/androidx/media3/session/legacy/MediaBrowserServiceCompat.java

@@ -1310,7 +1310,7 @@ public MediaSessionCompat.Token getSessionToken() {
    * of this bundle may affect the information returned when browsing.
    *
    * <p>Note that this will return null when connected to {@link android.media.browse.MediaBrowser}
-   * and running on API 23 or lower.
+   * and running on API 23.
    *
    * @throws IllegalStateException If this method is called outside of {@link #onLoadChildren},
    *     {@link #onLoadItem} or {@link #onSearch}.

libraries/test_session_current/src/androidTest/java/androidx/media3/session/MediaSessionCompatCallbackWithMediaControllerTest.java

@@ -50,7 +50,6 @@
 import androidx.media3.test.session.common.TestUtils;
 import androidx.test.core.app.ApplicationProvider;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
-import androidx.test.filters.SdkSuppress;
 import androidx.test.filters.SmallTest;
 import com.google.common.collect.ImmutableList;
 import java.util.ArrayList;
@@ -628,7 +627,6 @@ public void decreaseDeviceVolume_forLocalPlayback_decreasesStreamVolume() throws
   }
 
   @Test
-  @SdkSuppress(minSdkVersion = 23)
   public void setDeviceMuted_mute_forLocalPlayback_mutesStreamVolume() throws Exception {
     if (audioManager.isVolumeFixed()) {
       // This test is not eligible for this device.
@@ -657,7 +655,6 @@ public void setDeviceMuted_mute_forLocalPlayback_mutesStreamVolume() throws Exce
   }
 
   @Test
-  @SdkSuppress(minSdkVersion = 23)
   public void setDeviceMuted_unmute_forLocalPlayback_unmutesStreamVolume() throws Exception {
     if (audioManager.isVolumeFixed()) {
       // This test is not eligible for this device.

libraries/test_session_current/src/androidTest/java/androidx/media3/session/MediaSessionKeyEventTest.java

@@ -453,7 +453,7 @@ private static String getExpectedControllerPackageName(ControllerInfo controller
       // API 24 - 27: KeyEvent from system service has the package name "android".
       return "android";
     } else {
-      // API 21 - 23: Fallback set by MediaSessionCompat#getCurrentControllerInfo
+      // API 23: Fallback set by MediaSessionCompat#getCurrentControllerInfo
       return LEGACY_CONTROLLER;
     }
   }

libraries/transformer/src/main/java/androidx/media3/transformer/ExperimentalFrameExtractor.java

@@ -121,7 +121,7 @@
  *       {@linkplain MediaCodecSelector#PREFER_SOFTWARE software} or {@linkplain
  *       MediaCodecSelector#DEFAULT hardware} decoders across a wide range of devices.
  *   <li>Other inputs are likely to produce accurate output when using {@linkplain
- *       MediaCodecSelector#DEFAULT hardware} decoders on devices that are launched with API 13 or
+ *       MediaCodecSelector#DEFAULT hardware} decoders on devices that are launched with API 33 or
  *       later.
  *   <li>HDR inputs will produce a {@link Bitmap} with {@link ColorSpace.Named#BT2020_HLG}. There
  *       are no guarantees that an HLG {@link Bitmap} displayed in {@link ImageView} and an HLG