diff --git a/library/common/src/main/java/com/google/android/exoplayer2/Player.java b/library/common/src/main/java/com/google/android/exoplayer2/Player.java
index e3d7007d50..4b7dae3072 100644
--- a/library/common/src/main/java/com/google/android/exoplayer2/Player.java
+++ b/library/common/src/main/java/com/google/android/exoplayer2/Player.java
@@ -1417,6 +1417,9 @@ public interface Player {
    * <p>The currently available commands can be inspected with {@link #getAvailableCommands()} and
    * {@link #isCommandAvailable(int)}.
    *
+   * <p>See the documentation of each command constant for the details of which methods it permits
+   * calling.
+   *
    * <p>One of the following values:
    *
    * <ul>
@@ -1493,21 +1496,62 @@ public interface Player {
     COMMAND_GET_TRACKS,
   })
   @interface Command {}
-  /** Command to start, pause or resume playback. */
+  /**
+   * Command to start, pause or resume playback.
+   *
+   * <p>The following methods must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}:
+   *
+   * <ul>
+   *   <li>{@link #play()}
+   *   <li>{@link #pause()}
+   *   <li>{@link #setPlayWhenReady(boolean)}
+   * </ul>
+   */
   int COMMAND_PLAY_PAUSE = 1;
-  /** Command to prepare the player. */
+
+  /**
+   * Command to prepare the player.
+   *
+   * <p>The {@link #prepare()} method must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}.
+   */
   int COMMAND_PREPARE = 2;
-  /** Command to stop playback. */
+
+  /**
+   * Command to stop playback.
+   *
+   * <p>The {@link #stop()} method must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}.
+   */
   int COMMAND_STOP = 3;
-  /** Command to seek to the default position of the current {@link MediaItem}. */
+
+  /**
+   * Command to seek to the default position of the current {@link MediaItem}.
+   *
+   * <p>The {@link #seekToDefaultPosition()} method must only be called if this command is
+   * {@linkplain #isCommandAvailable(int) available}.
+   */
   int COMMAND_SEEK_TO_DEFAULT_POSITION = 4;
-  /** Command to seek anywhere inside the current {@link MediaItem}. */
+
+  /**
+   * Command to seek anywhere inside the current {@link MediaItem}.
+   *
+   * <p>The {@link #seekTo(long)} method must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}.
+   */
   int COMMAND_SEEK_IN_CURRENT_MEDIA_ITEM = 5;
   /**
    * @deprecated Use {@link #COMMAND_SEEK_IN_CURRENT_MEDIA_ITEM} instead.
    */
   @Deprecated int COMMAND_SEEK_IN_CURRENT_WINDOW = COMMAND_SEEK_IN_CURRENT_MEDIA_ITEM;
-  /** Command to seek to the default position of the previous {@link MediaItem}. */
+
+  /**
+   * Command to seek to the default position of the previous {@link MediaItem}.
+   *
+   * <p>The {@link #seekToPreviousMediaItem()} method must only be called if this command is
+   * {@linkplain #isCommandAvailable(int) available}.
+   */
   int COMMAND_SEEK_TO_PREVIOUS_MEDIA_ITEM = 6;
   /**
    * @deprecated Use {@link #COMMAND_SEEK_TO_PREVIOUS_MEDIA_ITEM} instead.
@@ -1516,9 +1560,17 @@ public interface Player {
   /**
    * Command to seek to an earlier position in the current {@link MediaItem} or the default position
    * of the previous {@link MediaItem}.
+   *
+   * <p>The {@link #seekToPrevious()} method must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}.
    */
   int COMMAND_SEEK_TO_PREVIOUS = 7;
-  /** Command to seek to the default position of the next {@link MediaItem}. */
+  /**
+   * Command to seek to the default position of the next {@link MediaItem}.
+   *
+   * <p>The {@link #seekToNextMediaItem()} method must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}.
+   */
   int COMMAND_SEEK_TO_NEXT_MEDIA_ITEM = 8;
   /**
    * @deprecated Use {@link #COMMAND_SEEK_TO_NEXT_MEDIA_ITEM} instead.
@@ -1527,57 +1579,259 @@ public interface Player {
   /**
    * Command to seek to a later position in the current {@link MediaItem} or the default position of
    * the next {@link MediaItem}.
+   *
+   * <p>The {@link #seekToNext()} method must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}.
    */
   int COMMAND_SEEK_TO_NEXT = 9;
-  /** Command to seek anywhere in any {@link MediaItem}. */
+
+  /**
+   * Command to seek anywhere in any {@link MediaItem}.
+   *
+   * <p>The following methods must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}:
+   *
+   * <ul>
+   *   <li>{@link #seekTo(int, long)}
+   *   <li>{@link #seekToDefaultPosition(int)}
+   * </ul>
+   */
   int COMMAND_SEEK_TO_MEDIA_ITEM = 10;
   /**
    * @deprecated Use {@link #COMMAND_SEEK_TO_MEDIA_ITEM} instead.
    */
   @Deprecated int COMMAND_SEEK_TO_WINDOW = COMMAND_SEEK_TO_MEDIA_ITEM;
-  /** Command to seek back by a fixed increment inside the current {@link MediaItem}. */
+  /**
+   * Command to seek back by a fixed increment inside the current {@link MediaItem}.
+   *
+   * <p>The {@link #seekBack()} method must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}.
+   */
   int COMMAND_SEEK_BACK = 11;
-  /** Command to seek forward by a fixed increment inside the current {@link MediaItem}. */
+  /**
+   * Command to seek forward by a fixed increment inside the current {@link MediaItem}.
+   *
+   * <p>The {@link #seekForward()} method must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}.
+   */
   int COMMAND_SEEK_FORWARD = 12;
-  /** Command to set the playback speed and pitch. */
+
+  /**
+   * Command to set the playback speed and pitch.
+   *
+   * <p>The following methods must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}:
+   *
+   * <ul>
+   *   <li>{@link #setPlaybackParameters(PlaybackParameters)}
+   *   <li>{@link #setPlaybackSpeed(float)}
+   * </ul>
+   */
   int COMMAND_SET_SPEED_AND_PITCH = 13;
-  /** Command to enable shuffling. */
+
+  /**
+   * Command to enable shuffling.
+   *
+   * <p>The {@link #setShuffleModeEnabled(boolean)} method must only be called if this command is
+   * {@linkplain #isCommandAvailable(int) available}.
+   */
   int COMMAND_SET_SHUFFLE_MODE = 14;
-  /** Command to set the repeat mode. */
+
+  /**
+   * Command to set the repeat mode.
+   *
+   * <p>The {@link #setRepeatMode(int)} method must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}.
+   */
   int COMMAND_SET_REPEAT_MODE = 15;
-  /** Command to get the currently playing {@link MediaItem}. */
+
+  /**
+   * Command to get the currently playing {@link MediaItem}.
+   *
+   * <p>The {@link #getCurrentMediaItem()} method must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}.
+   */
   int COMMAND_GET_CURRENT_MEDIA_ITEM = 16;
-  /** Command to get the information about the current timeline. */
+
+  /**
+   * Command to get the information about the current timeline.
+   *
+   * <p>The following methods must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}:
+   *
+   * <ul>
+   *   <li>{@link #getCurrentTimeline()}
+   *   <li>{@link #getCurrentMediaItemIndex()}
+   *   <li>{@link #getCurrentPeriodIndex()}
+   *   <li>{@link #getMediaItemCount()}
+   *   <li>{@link #getMediaItemAt(int)}
+   *   <li>{@link #getNextMediaItemIndex()}
+   *   <li>{@link #getPreviousMediaItemIndex()}
+   *   <li>{@link #hasPreviousMediaItem()}
+   *   <li>{@link #hasNextMediaItem()}
+   *   <li>{@link #getCurrentAdGroupIndex()}
+   *   <li>{@link #getCurrentAdIndexInAdGroup()}
+   * </ul>
+   */
   int COMMAND_GET_TIMELINE = 17;
-  /** Command to get metadata related to the playlist and current {@link MediaItem}. */
+
+  /**
+   * Command to get metadata related to the playlist and current {@link MediaItem}.
+   *
+   * <p>The following methods must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}:
+   *
+   * <ul>
+   *   <li>{@link #getMediaMetadata()}
+   *   <li>{@link #getPlaylistMetadata()}
+   * </ul>
+   */
   // TODO(b/263132691): Rename this to COMMAND_GET_METADATA
   int COMMAND_GET_MEDIA_ITEMS_METADATA = 18;
-  /** Command to set the playlist metadata. */
+
+  /**
+   * Command to set the playlist metadata.
+   *
+   * <p>The {@link #setPlaylistMetadata(MediaMetadata)} method must only be called if this command
+   * is {@linkplain #isCommandAvailable(int) available}.
+   */
   // TODO(b/263132691): Rename this to COMMAND_SET_PLAYLIST_METADATA
   int COMMAND_SET_MEDIA_ITEMS_METADATA = 19;
-  /** Command to set a {@link MediaItem}. */
+
+  /**
+   * Command to set a {@link MediaItem}.
+   *
+   * <p>The following methods must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}:
+   *
+   * <ul>
+   *   <li>{@link #setMediaItem(MediaItem)}
+   *   <li>{@link #setMediaItem(MediaItem, boolean)}
+   *   <li>{@link #setMediaItem(MediaItem, long)}
+   * </ul>
+   */
   int COMMAND_SET_MEDIA_ITEM = 31;
-  /** Command to change the {@linkplain MediaItem media items} in the playlist. */
+  /**
+   * Command to change the {@linkplain MediaItem media items} in the playlist.
+   *
+   * <p>The following methods must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}:
+   *
+   * <ul>
+   *   <li>{@link #addMediaItem(MediaItem)}
+   *   <li>{@link #addMediaItem(int, MediaItem)}
+   *   <li>{@link #addMediaItems(List)}
+   *   <li>{@link #addMediaItems(int, List)}
+   *   <li>{@link #clearMediaItems()}
+   *   <li>{@link #moveMediaItem(int, int)}
+   *   <li>{@link #moveMediaItems(int, int, int)}
+   *   <li>{@link #removeMediaItem(int)}
+   *   <li>{@link #removeMediaItems(int, int)}
+   *   <li>{@link #setMediaItems(List)}
+   *   <li>{@link #setMediaItems(List, boolean)}
+   *   <li>{@link #setMediaItems(List, int, long)}
+   * </ul>
+   */
   int COMMAND_CHANGE_MEDIA_ITEMS = 20;
-  /** Command to get the player current {@link AudioAttributes}. */
+
+  /**
+   * Command to get the player current {@link AudioAttributes}.
+   *
+   * <p>The {@link #getAudioAttributes()} method must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}.
+   */
   int COMMAND_GET_AUDIO_ATTRIBUTES = 21;
-  /** Command to get the player volume. */
+
+  /**
+   * Command to get the player volume.
+   *
+   * <p>The {@link #getVolume()} method must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}.
+   */
   int COMMAND_GET_VOLUME = 22;
-  /** Command to get the device volume and whether it is muted. */
+
+  /**
+   * Command to get the device volume and whether it is muted.
+   *
+   * <p>The following methods must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}:
+   *
+   * <ul>
+   *   <li>{@link #getDeviceVolume()}
+   *   <li>{@link #isDeviceMuted()}
+   * </ul>
+   */
   int COMMAND_GET_DEVICE_VOLUME = 23;
-  /** Command to set the player volume. */
+
+  /**
+   * Command to set the player volume.
+   *
+   * <p>The {@link #setVolume(float)} method must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}.
+   */
   int COMMAND_SET_VOLUME = 24;
-  /** Command to set the device volume. */
+  /**
+   * Command to set the device volume.
+   *
+   * <p>The {@link #setDeviceVolume(int)} method must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}.
+   */
   int COMMAND_SET_DEVICE_VOLUME = 25;
-  /** Command to increase and decrease the device volume and mute it. */
+
+  /**
+   * Command to increase and decrease the device volume and mute it.
+   *
+   * <p>The following methods must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}:
+   *
+   * <ul>
+   *   <li>{@link #increaseDeviceVolume()}
+   *   <li>{@link #decreaseDeviceVolume()}
+   *   <li>{@link #setDeviceMuted(boolean)}
+   * </ul>
+   */
   int COMMAND_ADJUST_DEVICE_VOLUME = 26;
-  /** Command to set and clear the surface on which to render the video. */
+
+  /**
+   * Command to set and clear the surface on which to render the video.
+   *
+   * <p>The following methods must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}:
+   *
+   * <ul>
+   *   <li>{@link #setVideoSurface(Surface)}
+   *   <li>{@link #clearVideoSurface()}
+   *   <li>{@link #clearVideoSurface(Surface)}
+   *   <li>{@link #setVideoSurfaceHolder(SurfaceHolder)}
+   *   <li>{@link #clearVideoSurfaceHolder(SurfaceHolder)}
+   *   <li>{@link #setVideoSurfaceView(SurfaceView)}
+   *   <li>{@link #clearVideoSurfaceView(SurfaceView)}
+   * </ul>
+   */
   int COMMAND_SET_VIDEO_SURFACE = 27;
-  /** Command to get the text that should currently be displayed by the player. */
+
+  /**
+   * Command to get the text that should currently be displayed by the player.
+   *
+   * <p>The {@link #getCurrentCues()} method must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}.
+   */
   int COMMAND_GET_TEXT = 28;
-  /** Command to set the player's track selection parameters. */
+
+  /**
+   * Command to set the player's track selection parameters.
+   *
+   * <p>The {@link #setTrackSelectionParameters(TrackSelectionParameters)} method must only be
+   * called if this command is {@linkplain #isCommandAvailable(int) available}.
+   */
   int COMMAND_SET_TRACK_SELECTION_PARAMETERS = 29;
-  /** Command to get details of the current track selection. */
+
+  /**
+   * Command to get details of the current track selection.
+   *
+   * <p>The {@link #getCurrentTracks()} method must only be called if this command is {@linkplain
+   * #isCommandAvailable(int) available}.
+   */
   int COMMAND_GET_TRACKS = 30;
 
   /** Represents an invalid {@link Command}. */
@@ -1615,6 +1869,9 @@ public interface Player {
    * Clears the playlist, adds the specified {@linkplain MediaItem media items} and resets the
    * position to the default position.
    *
+   * <p>This method must only be called if {@link #COMMAND_CHANGE_MEDIA_ITEMS} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param mediaItems The new {@linkplain MediaItem media items}.
    */
   void setMediaItems(List<MediaItem> mediaItems);
@@ -1622,6 +1879,9 @@ public interface Player {
   /**
    * Clears the playlist and adds the specified {@linkplain MediaItem media items}.
    *
+   * <p>This method must only be called if {@link #COMMAND_CHANGE_MEDIA_ITEMS} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param mediaItems The new {@linkplain MediaItem media items}.
    * @param resetPosition Whether the playback position should be reset to the default position in
    *     the first {@link Timeline.Window}. If false, playback will start from the position defined
@@ -1632,6 +1892,9 @@ public interface Player {
   /**
    * Clears the playlist and adds the specified {@linkplain MediaItem media items}.
    *
+   * <p>This method must only be called if {@link #COMMAND_CHANGE_MEDIA_ITEMS} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param mediaItems The new {@linkplain MediaItem media items}.
    * @param startIndex The {@link MediaItem} index to start playback from. If {@link C#INDEX_UNSET}
    *     is passed, the current position is not reset.
@@ -1648,6 +1911,9 @@ public interface Player {
    * Clears the playlist, adds the specified {@link MediaItem} and resets the position to the
    * default position.
    *
+   * <p>This method must only be called if {@link #COMMAND_SET_MEDIA_ITEM} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param mediaItem The new {@link MediaItem}.
    */
   void setMediaItem(MediaItem mediaItem);
@@ -1655,6 +1921,9 @@ public interface Player {
   /**
    * Clears the playlist and adds the specified {@link MediaItem}.
    *
+   * <p>This method must only be called if {@link #COMMAND_SET_MEDIA_ITEM} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param mediaItem The new {@link MediaItem}.
    * @param startPositionMs The position in milliseconds to start playback from.
    */
@@ -1663,6 +1932,9 @@ public interface Player {
   /**
    * Clears the playlist and adds the specified {@link MediaItem}.
    *
+   * <p>This method must only be called if {@link #COMMAND_SET_MEDIA_ITEM} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param mediaItem The new {@link MediaItem}.
    * @param resetPosition Whether the playback position should be reset to the default position. If
    *     false, playback will start from the position defined by {@link #getCurrentMediaItemIndex()}
@@ -1673,6 +1945,9 @@ public interface Player {
   /**
    * Adds a media item to the end of the playlist.
    *
+   * <p>This method must only be called if {@link #COMMAND_CHANGE_MEDIA_ITEMS} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param mediaItem The {@link MediaItem} to add.
    */
   void addMediaItem(MediaItem mediaItem);
@@ -1680,6 +1955,9 @@ public interface Player {
   /**
    * Adds a media item at the given index of the playlist.
    *
+   * <p>This method must only be called if {@link #COMMAND_CHANGE_MEDIA_ITEMS} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param index The index at which to add the media item. If the index is larger than the size of
    *     the playlist, the media item is added to the end of the playlist.
    * @param mediaItem The {@link MediaItem} to add.
@@ -1689,6 +1967,9 @@ public interface Player {
   /**
    * Adds a list of media items to the end of the playlist.
    *
+   * <p>This method must only be called if {@link #COMMAND_CHANGE_MEDIA_ITEMS} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param mediaItems The {@linkplain MediaItem media items} to add.
    */
   void addMediaItems(List<MediaItem> mediaItems);
@@ -1696,6 +1977,9 @@ public interface Player {
   /**
    * Adds a list of media items at the given index of the playlist.
    *
+   * <p>This method must only be called if {@link #COMMAND_CHANGE_MEDIA_ITEMS} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param index The index at which to add the media items. If the index is larger than the size of
    *     the playlist, the media items are added to the end of the playlist.
    * @param mediaItems The {@linkplain MediaItem media items} to add.
@@ -1705,6 +1989,9 @@ public interface Player {
   /**
    * Moves the media item at the current index to the new index.
    *
+   * <p>This method must only be called if {@link #COMMAND_CHANGE_MEDIA_ITEMS} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param currentIndex The current index of the media item to move. If the index is larger than
    *     the size of the playlist, the request is ignored.
    * @param newIndex The new index of the media item. If the new index is larger than the size of
@@ -1715,6 +2002,9 @@ public interface Player {
   /**
    * Moves the media item range to the new index.
    *
+   * <p>This method must only be called if {@link #COMMAND_CHANGE_MEDIA_ITEMS} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param fromIndex The start of the range to move. If the index is larger than the size of the
    *     playlist, the request is ignored.
    * @param toIndex The first item not to be included in the range (exclusive). If the index is
@@ -1728,6 +2018,9 @@ public interface Player {
   /**
    * Removes the media item at the given index of the playlist.
    *
+   * <p>This method must only be called if {@link #COMMAND_CHANGE_MEDIA_ITEMS} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param index The index at which to remove the media item. If the index is larger than the size
    *     of the playlist, the request is ignored.
    */
@@ -1736,6 +2029,9 @@ public interface Player {
   /**
    * Removes a range of media items from the playlist.
    *
+   * <p>This method must only be called if {@link #COMMAND_CHANGE_MEDIA_ITEMS} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param fromIndex The index at which to start removing media items. If the index is larger than
    *     the size of the playlist, the request is ignored.
    * @param toIndex The index of the first item to be kept (exclusive). If the index is larger than
@@ -1743,7 +2039,12 @@ public interface Player {
    */
   void removeMediaItems(int fromIndex, int toIndex);
 
-  /** Clears the playlist. */
+  /**
+   * Clears the playlist.
+   *
+   * <p>This method must only be called if {@link #COMMAND_CHANGE_MEDIA_ITEMS} is {@linkplain
+   * #getAvailableCommands() available}.
+   */
   void clearMediaItems();
 
   /**
@@ -1751,13 +2052,6 @@ public interface Player {
    *
    * <p>This method does not execute the command.
    *
-   * <p>Executing a command that is not available (for example, calling {@link
-   * #seekToNextMediaItem()} if {@link #COMMAND_SEEK_TO_NEXT_MEDIA_ITEM} is unavailable) will
-   * neither throw an exception nor generate a {@link #getPlayerError()} player error}.
-   *
-   * <p>{@link #COMMAND_SEEK_TO_PREVIOUS_MEDIA_ITEM} and {@link #COMMAND_SEEK_TO_NEXT_MEDIA_ITEM}
-   * are unavailable if there is no such {@link MediaItem}.
-   *
    * @param command A {@link Command}.
    * @return Whether the {@link Command} is available.
    * @see Listener#onAvailableCommandsChanged(Commands)
@@ -1774,13 +2068,6 @@ public interface Player {
    * Listener#onAvailableCommandsChanged(Commands)} to get an update when the available commands
    * change.
    *
-   * <p>Executing a command that is not available (for example, calling {@link
-   * #seekToNextMediaItem()} if {@link #COMMAND_SEEK_TO_NEXT_MEDIA_ITEM} is unavailable) will
-   * neither throw an exception nor generate a {@link #getPlayerError()} player error}.
-   *
-   * <p>{@link #COMMAND_SEEK_TO_PREVIOUS_MEDIA_ITEM} and {@link #COMMAND_SEEK_TO_NEXT_MEDIA_ITEM}
-   * are unavailable if there is no such {@link MediaItem}.
-   *
    * @return The currently available {@link Commands}.
    * @see Listener#onAvailableCommandsChanged
    */
@@ -1789,6 +2076,9 @@ public interface Player {
   /**
    * Prepares the player.
    *
+   * <p>This method must only be called if {@link #COMMAND_PREPARE} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * <p>This will move the player out of {@link #STATE_IDLE idle state} and the player will start
    * loading media and acquire resources needed for playback.
    */
@@ -1846,10 +2136,18 @@ public interface Player {
   /**
    * Resumes playback as soon as {@link #getPlaybackState()} == {@link #STATE_READY}. Equivalent to
    * {@link #setPlayWhenReady(boolean) setPlayWhenReady(true)}.
+   *
+   * <p>This method must only be called if {@link #COMMAND_PLAY_PAUSE} is {@linkplain
+   * #getAvailableCommands() available}.
    */
   void play();
 
-  /** Pauses playback. Equivalent to {@link #setPlayWhenReady(boolean) setPlayWhenReady(false)}. */
+  /**
+   * Pauses playback. Equivalent to {@link #setPlayWhenReady(boolean) setPlayWhenReady(false)}.
+   *
+   * <p>This method must only be called if {@link #COMMAND_PLAY_PAUSE} is {@linkplain
+   * #getAvailableCommands() available}.
+   */
   void pause();
 
   /**
@@ -1857,6 +2155,9 @@ public interface Player {
    *
    * <p>If the player is already in the ready state then this method pauses and resumes playback.
    *
+   * <p>This method must only be called if {@link #COMMAND_PLAY_PAUSE} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param playWhenReady Whether playback should proceed when ready.
    */
   void setPlayWhenReady(boolean playWhenReady);
@@ -1872,6 +2173,9 @@ public interface Player {
   /**
    * Sets the {@link RepeatMode} to be used for playback.
    *
+   * <p>This method must only be called if {@link #COMMAND_SET_REPEAT_MODE} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param repeatMode The repeat mode.
    */
   void setRepeatMode(@RepeatMode int repeatMode);
@@ -1888,6 +2192,9 @@ public interface Player {
   /**
    * Sets whether shuffling of media items is enabled.
    *
+   * <p>This method must only be called if {@link #COMMAND_SET_SHUFFLE_MODE} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param shuffleModeEnabled Whether shuffling is enabled.
    */
   void setShuffleModeEnabled(boolean shuffleModeEnabled);
@@ -1911,6 +2218,9 @@ public interface Player {
    * Seeks to the default position associated with the current {@link MediaItem}. The position can
    * depend on the type of media being played. For live streams it will typically be the live edge.
    * For other streams it will typically be the start.
+   *
+   * <p>This method must only be called if {@link #COMMAND_SEEK_TO_DEFAULT_POSITION} is {@linkplain
+   * #getAvailableCommands() available}.
    */
   void seekToDefaultPosition();
 
@@ -1919,6 +2229,9 @@ public interface Player {
    * depend on the type of media being played. For live streams it will typically be the live edge.
    * For other streams it will typically be the start.
    *
+   * <p>This method must only be called if {@link #COMMAND_SEEK_TO_MEDIA_ITEM} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param mediaItemIndex The index of the {@link MediaItem} whose associated default position
    *     should be seeked to. If the index is larger than the size of the playlist, the request is
    *     ignored.
@@ -1928,6 +2241,9 @@ public interface Player {
   /**
    * Seeks to a position specified in milliseconds in the current {@link MediaItem}.
    *
+   * <p>This method must only be called if {@link #COMMAND_SEEK_IN_CURRENT_MEDIA_ITEM} is
+   * {@linkplain #getAvailableCommands() available}.
+   *
    * @param positionMs The seek position in the current {@link MediaItem}, or {@link C#TIME_UNSET}
    *     to seek to the media item's default position.
    */
@@ -1936,6 +2252,9 @@ public interface Player {
   /**
    * Seeks to a position specified in milliseconds in the specified {@link MediaItem}.
    *
+   * <p>This method must only be called if {@link #COMMAND_SEEK_TO_MEDIA_ITEM} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param mediaItemIndex The index of the {@link MediaItem}. If the index is larger than the size
    *     of the playlist, the request is ignored.
    * @param positionMs The seek position in the specified {@link MediaItem}, or {@link C#TIME_UNSET}
@@ -1953,6 +2272,9 @@ public interface Player {
 
   /**
    * Seeks back in the current {@link MediaItem} by {@link #getSeekBackIncrement()} milliseconds.
+   *
+   * <p>This method must only be called if {@link #COMMAND_SEEK_BACK} is {@linkplain
+   * #getAvailableCommands() available}.
    */
   void seekBack();
 
@@ -1967,6 +2289,9 @@ public interface Player {
   /**
    * Seeks forward in the current {@link MediaItem} by {@link #getSeekForwardIncrement()}
    * milliseconds.
+   *
+   * <p>This method must only be called if {@link #COMMAND_SEEK_FORWARD} is {@linkplain
+   * #getAvailableCommands() available}.
    */
   void seekForward();
 
@@ -2012,6 +2337,9 @@ public interface Player {
    * <p>Note: When the repeat mode is {@link #REPEAT_MODE_ONE}, this method behaves the same as when
    * the current repeat mode is {@link #REPEAT_MODE_OFF}. See {@link #REPEAT_MODE_ONE} for more
    * details.
+   *
+   * <p>This method must only be called if {@link #COMMAND_SEEK_TO_PREVIOUS_MEDIA_ITEM} is
+   * {@linkplain #getAvailableCommands() available}.
    */
   void seekToPreviousMediaItem();
 
@@ -2043,6 +2371,9 @@ public interface Player {
    *       MediaItem}.
    *   <li>Otherwise, seeks to 0 in the current {@link MediaItem}.
    * </ul>
+   *
+   * <p>This method must only be called if {@link #COMMAND_SEEK_TO_PREVIOUS} is {@linkplain
+   * #getAvailableCommands() available}.
    */
   void seekToPrevious();
 
@@ -2088,6 +2419,9 @@ public interface Player {
    * <p>Note: When the repeat mode is {@link #REPEAT_MODE_ONE}, this method behaves the same as when
    * the current repeat mode is {@link #REPEAT_MODE_OFF}. See {@link #REPEAT_MODE_ONE} for more
    * details.
+   *
+   * <p>This method must only be called if {@link #COMMAND_SEEK_TO_NEXT_MEDIA_ITEM} is {@linkplain
+   * #getAvailableCommands() available}.
    */
   void seekToNextMediaItem();
 
@@ -2103,6 +2437,9 @@ public interface Player {
    *       has not ended, seeks to the live edge of the current {@link MediaItem}.
    *   <li>Otherwise, does nothing.
    * </ul>
+   *
+   * <p>This method must only be called if {@link #COMMAND_SEEK_TO_NEXT} is {@linkplain
+   * #getAvailableCommands() available}.
    */
   void seekToNext();
 
@@ -2114,6 +2451,9 @@ public interface Player {
    * Listener#onPlaybackParametersChanged(PlaybackParameters)} will be called whenever the currently
    * active playback parameters change.
    *
+   * <p>This method must only be called if {@link #COMMAND_SET_SPEED_AND_PITCH} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param playbackParameters The playback parameters.
    */
   void setPlaybackParameters(PlaybackParameters playbackParameters);
@@ -2124,6 +2464,9 @@ public interface Player {
    * <p>This is equivalent to {@code
    * setPlaybackParameters(getPlaybackParameters().withSpeed(speed))}.
    *
+   * <p>This method must only be called if {@link #COMMAND_SET_SPEED_AND_PITCH} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param speed The linear factor by which playback will be sped up. Must be higher than 0. 1 is
    *     normal speed, 2 is twice as fast, 0.5 is half normal speed.
    */
@@ -2147,6 +2490,9 @@ public interface Player {
    *
    * <p>Calling this method does not clear the playlist, reset the playback position or the playback
    * error.
+   *
+   * <p>This method must only be called if {@link #COMMAND_STOP} is {@linkplain
+   * #getAvailableCommands() available}.
    */
   void stop();
 
@@ -2162,11 +2508,15 @@ public interface Player {
    * Releases the player. This method must be called when the player is no longer required. The
    * player must not be used after calling this method.
    */
+  // TODO(b/261158047): Document that COMMAND_RELEASE must be available once it exists.
   void release();
 
   /**
    * Returns the current tracks.
    *
+   * <p>This method must only be called if {@link #COMMAND_GET_TRACKS} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @see Listener#onTracksChanged(Tracks)
    */
   Tracks getCurrentTracks();
@@ -2194,6 +2544,9 @@ public interface Player {
    *         .setMaxVideoSizeSd()
    *         .build())
    * }</pre>
+   *
+   * <p>This method must only be called if {@link #COMMAND_SET_TRACK_SELECTION_PARAMETERS} is
+   * {@linkplain #getAvailableCommands() available}.
    */
   void setTrackSelectionParameters(TrackSelectionParameters parameters);
 
@@ -2206,16 +2559,27 @@ public interface Player {
    * metadata that has been parsed from the media and output via {@link
    * Listener#onMetadata(Metadata)}. If a field is populated in the {@link MediaItem#mediaMetadata},
    * it will be prioritised above the same field coming from static or timed metadata.
+   *
+   * <p>This method must only be called if {@link #COMMAND_GET_MEDIA_ITEMS_METADATA} is {@linkplain
+   * #getAvailableCommands() available}.
    */
   MediaMetadata getMediaMetadata();
 
   /**
    * Returns the playlist {@link MediaMetadata}, as set by {@link
    * #setPlaylistMetadata(MediaMetadata)}, or {@link MediaMetadata#EMPTY} if not supported.
+   *
+   * <p>This method must only be called if {@link #COMMAND_GET_MEDIA_ITEMS_METADATA} is {@linkplain
+   * #getAvailableCommands() available}.
    */
   MediaMetadata getPlaylistMetadata();
 
-  /** Sets the playlist {@link MediaMetadata}. */
+  /**
+   * Sets the playlist {@link MediaMetadata}.
+   *
+   * <p>This method must only be called if {@link #COMMAND_SET_MEDIA_ITEMS_METADATA} is {@linkplain
+   * #getAvailableCommands() available}.
+   */
   void setPlaylistMetadata(MediaMetadata mediaMetadata);
 
   /**
@@ -2227,11 +2591,19 @@ public interface Player {
   /**
    * Returns the current {@link Timeline}. Never null, but may be empty.
    *
+   * <p>This method must only be called if {@link #COMMAND_GET_TIMELINE} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @see Listener#onTimelineChanged(Timeline, int)
    */
   Timeline getCurrentTimeline();
 
-  /** Returns the index of the period currently being played. */
+  /**
+   * Returns the index of the period currently being played.
+   *
+   * <p>This method must only be called if {@link #COMMAND_GET_TIMELINE} is {@linkplain
+   * #getAvailableCommands() available}.
+   */
   int getCurrentPeriodIndex();
 
   /**
@@ -2244,6 +2616,9 @@ public interface Player {
    * Returns the index of the current {@link MediaItem} in the {@link #getCurrentTimeline()
    * timeline}, or the prospective index if the {@link #getCurrentTimeline() current timeline} is
    * empty.
+   *
+   * <p>This method must only be called if {@link #COMMAND_GET_TIMELINE} is {@linkplain
+   * #getAvailableCommands() available}.
    */
   int getCurrentMediaItemIndex();
 
@@ -2262,6 +2637,9 @@ public interface Player {
    * <p>Note: When the repeat mode is {@link #REPEAT_MODE_ONE}, this method behaves the same as when
    * the current repeat mode is {@link #REPEAT_MODE_OFF}. See {@link #REPEAT_MODE_ONE} for more
    * details.
+   *
+   * <p>This method must only be called if {@link #COMMAND_GET_TIMELINE} is {@linkplain
+   * #getAvailableCommands() available}.
    */
   int getNextMediaItemIndex();
 
@@ -2280,21 +2658,37 @@ public interface Player {
    * <p>Note: When the repeat mode is {@link #REPEAT_MODE_ONE}, this method behaves the same as when
    * the current repeat mode is {@link #REPEAT_MODE_OFF}. See {@link #REPEAT_MODE_ONE} for more
    * details.
+   *
+   * <p>This method must only be called if {@link #COMMAND_GET_TIMELINE} is {@linkplain
+   * #getAvailableCommands() available}.
    */
   int getPreviousMediaItemIndex();
 
   /**
    * Returns the currently playing {@link MediaItem}. May be null if the timeline is empty.
    *
+   * <p>This method must only be called if {@link #COMMAND_GET_CURRENT_MEDIA_ITEM} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @see Listener#onMediaItemTransition(MediaItem, int)
    */
   @Nullable
   MediaItem getCurrentMediaItem();
 
-  /** Returns the number of {@linkplain MediaItem media items} in the playlist. */
+  /**
+   * Returns the number of {@linkplain MediaItem media items} in the playlist.
+   *
+   * <p>This method must only be called if {@link #COMMAND_GET_TIMELINE} is {@linkplain
+   * #getAvailableCommands() available}.
+   */
   int getMediaItemCount();
 
-  /** Returns the {@link MediaItem} at the given index. */
+  /**
+   * Returns the {@link MediaItem} at the given index.
+   *
+   * <p>This method must only be called if {@link #COMMAND_GET_TIMELINE} is {@linkplain
+   * #getAvailableCommands() available}.
+   */
   MediaItem getMediaItemAt(int index);
 
   /**
@@ -2389,12 +2783,18 @@ public interface Player {
   /**
    * If {@link #isPlayingAd()} returns true, returns the index of the ad group in the period
    * currently being played. Returns {@link C#INDEX_UNSET} otherwise.
+   *
+   * <p>This method must only be called if {@link #COMMAND_GET_TIMELINE} is {@linkplain
+   * #getAvailableCommands() available}.
    */
   int getCurrentAdGroupIndex();
 
   /**
    * If {@link #isPlayingAd()} returns true, returns the index of the ad in its ad group. Returns
    * {@link C#INDEX_UNSET} otherwise.
+   *
+   * <p>This method must only be called if {@link #COMMAND_GET_TIMELINE} is {@linkplain
+   * #getAvailableCommands() available}.
    */
   int getCurrentAdIndexInAdGroup();
 
@@ -2419,13 +2819,21 @@ public interface Player {
    */
   long getContentBufferedPosition();
 
-  /** Returns the attributes for audio playback. */
+  /**
+   * Returns the attributes for audio playback.
+   *
+   * <p>This method must only be called if {@link #COMMAND_GET_AUDIO_ATTRIBUTES} is {@linkplain
+   * #getAvailableCommands() available}.
+   */
   AudioAttributes getAudioAttributes();
 
   /**
    * Sets the audio volume, valid values are between 0 (silence) and 1 (unity gain, signal
    * unchanged), inclusive.
    *
+   * <p>This method must only be called if {@link #COMMAND_SET_VOLUME} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param volume Linear output gain to apply to all audio channels.
    */
   void setVolume(@FloatRange(from = 0, to = 1.0) float volume);
@@ -2433,6 +2841,9 @@ public interface Player {
   /**
    * Returns the audio volume, with 0 being silence and 1 being unity gain (signal unchanged).
    *
+   * <p>This method must only be called if {@link #COMMAND_GET_VOLUME} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @return The linear gain applied to all audio channels.
    */
   @FloatRange(from = 0, to = 1.0)
@@ -2441,6 +2852,9 @@ public interface Player {
   /**
    * Clears any {@link Surface}, {@link SurfaceHolder}, {@link SurfaceView} or {@link TextureView}
    * currently set on the player.
+   *
+   * <p>This method must only be called if {@link #COMMAND_SET_VIDEO_SURFACE} is {@linkplain
+   * #getAvailableCommands() available}.
    */
   void clearVideoSurface();
 
@@ -2448,6 +2862,9 @@ public interface Player {
    * Clears the {@link Surface} onto which video is being rendered if it matches the one passed.
    * Else does nothing.
    *
+   * <p>This method must only be called if {@link #COMMAND_SET_VIDEO_SURFACE} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param surface The surface to clear.
    */
   void clearVideoSurface(@Nullable Surface surface);
@@ -2463,6 +2880,9 @@ public interface Player {
    * this method, since passing the holder allows the player to track the lifecycle of the surface
    * automatically.
    *
+   * <p>This method must only be called if {@link #COMMAND_SET_VIDEO_SURFACE} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param surface The {@link Surface}.
    */
   void setVideoSurface(@Nullable Surface surface);
@@ -2474,6 +2894,9 @@ public interface Player {
    * <p>The thread that calls the {@link SurfaceHolder.Callback} methods must be the thread
    * associated with {@link #getApplicationLooper()}.
    *
+   * <p>This method must only be called if {@link #COMMAND_SET_VIDEO_SURFACE} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param surfaceHolder The surface holder.
    */
   void setVideoSurfaceHolder(@Nullable SurfaceHolder surfaceHolder);
@@ -2482,6 +2905,9 @@ public interface Player {
    * Clears the {@link SurfaceHolder} that holds the {@link Surface} onto which video is being
    * rendered if it matches the one passed. Else does nothing.
    *
+   * <p>This method must only be called if {@link #COMMAND_SET_VIDEO_SURFACE} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param surfaceHolder The surface holder to clear.
    */
   void clearVideoSurfaceHolder(@Nullable SurfaceHolder surfaceHolder);
@@ -2493,6 +2919,9 @@ public interface Player {
    * <p>The thread that calls the {@link SurfaceHolder.Callback} methods must be the thread
    * associated with {@link #getApplicationLooper()}.
    *
+   * <p>This method must only be called if {@link #COMMAND_SET_VIDEO_SURFACE} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param surfaceView The surface view.
    */
   void setVideoSurfaceView(@Nullable SurfaceView surfaceView);
@@ -2501,6 +2930,9 @@ public interface Player {
    * Clears the {@link SurfaceView} onto which video is being rendered if it matches the one passed.
    * Else does nothing.
    *
+   * <p>This method must only be called if {@link #COMMAND_SET_VIDEO_SURFACE} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param surfaceView The texture view to clear.
    */
   void clearVideoSurfaceView(@Nullable SurfaceView surfaceView);
@@ -2512,6 +2944,9 @@ public interface Player {
    * <p>The thread that calls the {@link TextureView.SurfaceTextureListener} methods must be the
    * thread associated with {@link #getApplicationLooper()}.
    *
+   * <p>This method must only be called if {@link #COMMAND_SET_VIDEO_SURFACE} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param textureView The texture view.
    */
   void setVideoTextureView(@Nullable TextureView textureView);
@@ -2520,6 +2955,9 @@ public interface Player {
    * Clears the {@link TextureView} onto which video is being rendered if it matches the one passed.
    * Else does nothing.
    *
+   * <p>This method must only be called if {@link #COMMAND_SET_VIDEO_SURFACE} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param textureView The texture view to clear.
    */
   void clearVideoTextureView(@Nullable TextureView textureView);
@@ -2541,7 +2979,12 @@ public interface Player {
    */
   Size getSurfaceSize();
 
-  /** Returns the current {@link CueGroup}. */
+  /**
+   * Returns the current {@link CueGroup}.
+   *
+   * <p>This method must only be called if {@link #COMMAND_GET_TEXT} is {@linkplain
+   * #getAvailableCommands() available}.
+   */
   CueGroup getCurrentCues();
 
   /** Gets the device information. */
@@ -2557,26 +3000,52 @@ public interface Player {
    *
    * <p>For devices with {@link DeviceInfo#PLAYBACK_TYPE_REMOTE remote playback}, the volume of the
    * remote device is returned.
+   *
+   * <p>This method must only be called if {@link #COMMAND_GET_DEVICE_VOLUME} is {@linkplain
+   * #getAvailableCommands() available}.
    */
   @IntRange(from = 0)
   int getDeviceVolume();
 
-  /** Gets whether the device is muted or not. */
+  /**
+   * Gets whether the device is muted or not.
+   *
+   * <p>This method must only be called if {@link #COMMAND_GET_DEVICE_VOLUME} is {@linkplain
+   * #getAvailableCommands() available}.
+   */
   boolean isDeviceMuted();
 
   /**
    * Sets the volume of the device.
    *
+   * <p>This method must only be called if {@link #COMMAND_SET_DEVICE_VOLUME} is {@linkplain
+   * #getAvailableCommands() available}.
+   *
    * @param volume The volume to set.
    */
   void setDeviceVolume(@IntRange(from = 0) int volume);
 
-  /** Increases the volume of the device. */
+  /**
+   * Increases the volume of the device.
+   *
+   * <p>This method must only be called if {@link #COMMAND_ADJUST_DEVICE_VOLUME} is {@linkplain
+   * #getAvailableCommands() available}.
+   */
   void increaseDeviceVolume();
 
-  /** Decreases the volume of the device. */
+  /**
+   * Decreases the volume of the device.
+   *
+   * <p>This method must only be called if {@link #COMMAND_ADJUST_DEVICE_VOLUME} is {@linkplain
+   * #getAvailableCommands() available}.
+   */
   void decreaseDeviceVolume();
 
-  /** Sets the mute state of the device. */
+  /**
+   * Sets the mute state of the device.
+   *
+   * <p>This method must only be called if {@link #COMMAND_ADJUST_DEVICE_VOLUME} is {@linkplain
+   * #getAvailableCommands() available}.
+   */
   void setDeviceMuted(boolean muted);
 }