| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.media; |
| |
| import android.app.PendingIntent; |
| import android.content.ComponentName; |
| import android.content.Intent; |
| import android.graphics.Bitmap; |
| import android.media.session.MediaSessionLegacyHelper; |
| import android.media.session.PlaybackState; |
| import android.media.session.MediaSession; |
| import android.os.Bundle; |
| import android.os.Handler; |
| import android.os.Looper; |
| import android.os.Message; |
| import android.os.ServiceManager; |
| import android.os.SystemClock; |
| import android.util.Log; |
| |
| import java.lang.IllegalArgumentException; |
| |
| /** |
| * RemoteControlClient enables exposing information meant to be consumed by remote controls |
| * capable of displaying metadata, artwork and media transport control buttons. |
| * |
| * <p>A remote control client object is associated with a media button event receiver. This |
| * event receiver must have been previously registered with |
| * {@link AudioManager#registerMediaButtonEventReceiver(ComponentName)} before the |
| * RemoteControlClient can be registered through |
| * {@link AudioManager#registerRemoteControlClient(RemoteControlClient)}. |
| * |
| * <p>Here is an example of creating a RemoteControlClient instance after registering a media |
| * button event receiver: |
| * <pre>ComponentName myEventReceiver = new ComponentName(getPackageName(), MyRemoteControlEventReceiver.class.getName()); |
| * AudioManager myAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE); |
| * myAudioManager.registerMediaButtonEventReceiver(myEventReceiver); |
| * // build the PendingIntent for the remote control client |
| * Intent mediaButtonIntent = new Intent(Intent.ACTION_MEDIA_BUTTON); |
| * mediaButtonIntent.setComponent(myEventReceiver); |
| * PendingIntent mediaPendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 0, mediaButtonIntent, 0); |
| * // create and register the remote control client |
| * RemoteControlClient myRemoteControlClient = new RemoteControlClient(mediaPendingIntent); |
| * myAudioManager.registerRemoteControlClient(myRemoteControlClient);</pre> |
| * |
| * @deprecated Use {@link MediaSession} instead. |
| */ |
| @Deprecated public class RemoteControlClient |
| { |
| private final static String TAG = "RemoteControlClient"; |
| private final static boolean DEBUG = false; |
| |
| /** |
| * Playback state of a RemoteControlClient which is stopped. |
| * |
| * @see #setPlaybackState(int) |
| */ |
| public final static int PLAYSTATE_STOPPED = 1; |
| /** |
| * Playback state of a RemoteControlClient which is paused. |
| * |
| * @see #setPlaybackState(int) |
| */ |
| public final static int PLAYSTATE_PAUSED = 2; |
| /** |
| * Playback state of a RemoteControlClient which is playing media. |
| * |
| * @see #setPlaybackState(int) |
| */ |
| public final static int PLAYSTATE_PLAYING = 3; |
| /** |
| * Playback state of a RemoteControlClient which is fast forwarding in the media |
| * it is currently playing. |
| * |
| * @see #setPlaybackState(int) |
| */ |
| public final static int PLAYSTATE_FAST_FORWARDING = 4; |
| /** |
| * Playback state of a RemoteControlClient which is fast rewinding in the media |
| * it is currently playing. |
| * |
| * @see #setPlaybackState(int) |
| */ |
| public final static int PLAYSTATE_REWINDING = 5; |
| /** |
| * Playback state of a RemoteControlClient which is skipping to the next |
| * logical chapter (such as a song in a playlist) in the media it is currently playing. |
| * |
| * @see #setPlaybackState(int) |
| */ |
| public final static int PLAYSTATE_SKIPPING_FORWARDS = 6; |
| /** |
| * Playback state of a RemoteControlClient which is skipping back to the previous |
| * logical chapter (such as a song in a playlist) in the media it is currently playing. |
| * |
| * @see #setPlaybackState(int) |
| */ |
| public final static int PLAYSTATE_SKIPPING_BACKWARDS = 7; |
| /** |
| * Playback state of a RemoteControlClient which is buffering data to play before it can |
| * start or resume playback. |
| * |
| * @see #setPlaybackState(int) |
| */ |
| public final static int PLAYSTATE_BUFFERING = 8; |
| /** |
| * Playback state of a RemoteControlClient which cannot perform any playback related |
| * operation because of an internal error. Examples of such situations are no network |
| * connectivity when attempting to stream data from a server, or expired user credentials |
| * when trying to play subscription-based content. |
| * |
| * @see #setPlaybackState(int) |
| */ |
| public final static int PLAYSTATE_ERROR = 9; |
| /** |
| * @hide |
| * The value of a playback state when none has been declared. |
| * Intentionally hidden as an application shouldn't set such a playback state value. |
| */ |
| public final static int PLAYSTATE_NONE = 0; |
| |
| /** |
| * @hide |
| * The default playback type, "local", indicating the presentation of the media is happening on |
| * the same device (e.g. a phone, a tablet) as where it is controlled from. |
| */ |
| public final static int PLAYBACK_TYPE_LOCAL = 0; |
| /** |
| * @hide |
| * A playback type indicating the presentation of the media is happening on |
| * a different device (i.e. the remote device) than where it is controlled from. |
| */ |
| public final static int PLAYBACK_TYPE_REMOTE = 1; |
| private final static int PLAYBACK_TYPE_MIN = PLAYBACK_TYPE_LOCAL; |
| private final static int PLAYBACK_TYPE_MAX = PLAYBACK_TYPE_REMOTE; |
| /** |
| * @hide |
| * Playback information indicating the playback volume is fixed, i.e. it cannot be controlled |
| * from this object. An example of fixed playback volume is a remote player, playing over HDMI |
| * where the user prefer to control the volume on the HDMI sink, rather than attenuate at the |
| * source. |
| * @see #PLAYBACKINFO_VOLUME_HANDLING. |
| */ |
| public final static int PLAYBACK_VOLUME_FIXED = 0; |
| /** |
| * @hide |
| * Playback information indicating the playback volume is variable and can be controlled from |
| * this object. |
| * @see #PLAYBACKINFO_VOLUME_HANDLING. |
| */ |
| public final static int PLAYBACK_VOLUME_VARIABLE = 1; |
| /** |
| * @hide (to be un-hidden) |
| * The playback information value indicating the value of a given information type is invalid. |
| * @see #PLAYBACKINFO_VOLUME_HANDLING. |
| */ |
| public final static int PLAYBACKINFO_INVALID_VALUE = Integer.MIN_VALUE; |
| |
| /** |
| * @hide |
| * An unknown or invalid playback position value. |
| */ |
| public final static long PLAYBACK_POSITION_INVALID = -1; |
| /** |
| * @hide |
| * An invalid playback position value associated with the use of {@link #setPlaybackState(int)} |
| * used to indicate that playback position will remain unknown. |
| */ |
| public final static long PLAYBACK_POSITION_ALWAYS_UNKNOWN = 0x8019771980198300L; |
| /** |
| * @hide |
| * The default playback speed, 1x. |
| */ |
| public final static float PLAYBACK_SPEED_1X = 1.0f; |
| |
| //========================================== |
| // Public keys for playback information |
| /** |
| * @hide |
| * Playback information that defines the type of playback associated with this |
| * RemoteControlClient. See {@link #PLAYBACK_TYPE_LOCAL} and {@link #PLAYBACK_TYPE_REMOTE}. |
| */ |
| public final static int PLAYBACKINFO_PLAYBACK_TYPE = 1; |
| /** |
| * @hide |
| * Playback information that defines at what volume the playback associated with this |
| * RemoteControlClient is performed. This information is only used when the playback type is not |
| * local (see {@link #PLAYBACKINFO_PLAYBACK_TYPE}). |
| */ |
| public final static int PLAYBACKINFO_VOLUME = 2; |
| /** |
| * @hide |
| * Playback information that defines the maximum volume volume value that is supported |
| * by the playback associated with this RemoteControlClient. This information is only used |
| * when the playback type is not local (see {@link #PLAYBACKINFO_PLAYBACK_TYPE}). |
| */ |
| public final static int PLAYBACKINFO_VOLUME_MAX = 3; |
| /** |
| * @hide |
| * Playback information that defines how volume is handled for the presentation of the media. |
| * @see #PLAYBACK_VOLUME_FIXED |
| * @see #PLAYBACK_VOLUME_VARIABLE |
| */ |
| public final static int PLAYBACKINFO_VOLUME_HANDLING = 4; |
| /** |
| * @hide |
| * Playback information that defines over what stream type the media is presented. |
| */ |
| public final static int PLAYBACKINFO_USES_STREAM = 5; |
| |
| //========================================== |
| // Public flags for the supported transport control capabilities |
| /** |
| * Flag indicating a RemoteControlClient makes use of the "previous" media key. |
| * |
| * @see #setTransportControlFlags(int) |
| * @see android.view.KeyEvent#KEYCODE_MEDIA_PREVIOUS |
| */ |
| public final static int FLAG_KEY_MEDIA_PREVIOUS = 1 << 0; |
| /** |
| * Flag indicating a RemoteControlClient makes use of the "rewind" media key. |
| * |
| * @see #setTransportControlFlags(int) |
| * @see android.view.KeyEvent#KEYCODE_MEDIA_REWIND |
| */ |
| public final static int FLAG_KEY_MEDIA_REWIND = 1 << 1; |
| /** |
| * Flag indicating a RemoteControlClient makes use of the "play" media key. |
| * |
| * @see #setTransportControlFlags(int) |
| * @see android.view.KeyEvent#KEYCODE_MEDIA_PLAY |
| */ |
| public final static int FLAG_KEY_MEDIA_PLAY = 1 << 2; |
| /** |
| * Flag indicating a RemoteControlClient makes use of the "play/pause" media key. |
| * |
| * @see #setTransportControlFlags(int) |
| * @see android.view.KeyEvent#KEYCODE_MEDIA_PLAY_PAUSE |
| */ |
| public final static int FLAG_KEY_MEDIA_PLAY_PAUSE = 1 << 3; |
| /** |
| * Flag indicating a RemoteControlClient makes use of the "pause" media key. |
| * |
| * @see #setTransportControlFlags(int) |
| * @see android.view.KeyEvent#KEYCODE_MEDIA_PAUSE |
| */ |
| public final static int FLAG_KEY_MEDIA_PAUSE = 1 << 4; |
| /** |
| * Flag indicating a RemoteControlClient makes use of the "stop" media key. |
| * |
| * @see #setTransportControlFlags(int) |
| * @see android.view.KeyEvent#KEYCODE_MEDIA_STOP |
| */ |
| public final static int FLAG_KEY_MEDIA_STOP = 1 << 5; |
| /** |
| * Flag indicating a RemoteControlClient makes use of the "fast forward" media key. |
| * |
| * @see #setTransportControlFlags(int) |
| * @see android.view.KeyEvent#KEYCODE_MEDIA_FAST_FORWARD |
| */ |
| public final static int FLAG_KEY_MEDIA_FAST_FORWARD = 1 << 6; |
| /** |
| * Flag indicating a RemoteControlClient makes use of the "next" media key. |
| * |
| * @see #setTransportControlFlags(int) |
| * @see android.view.KeyEvent#KEYCODE_MEDIA_NEXT |
| */ |
| public final static int FLAG_KEY_MEDIA_NEXT = 1 << 7; |
| /** |
| * Flag indicating a RemoteControlClient can receive changes in the media playback position |
| * through the {@link OnPlaybackPositionUpdateListener} interface. This flag must be set |
| * in order for components that display the RemoteControlClient information, to display and |
| * let the user control media playback position. |
| * @see #setTransportControlFlags(int) |
| * @see #setOnGetPlaybackPositionListener(OnGetPlaybackPositionListener) |
| * @see #setPlaybackPositionUpdateListener(OnPlaybackPositionUpdateListener) |
| */ |
| public final static int FLAG_KEY_MEDIA_POSITION_UPDATE = 1 << 8; |
| /** |
| * Flag indicating a RemoteControlClient supports ratings. |
| * This flag must be set in order for components that display the RemoteControlClient |
| * information, to display ratings information, and, if ratings are declared editable |
| * (by calling {@link MediaMetadataEditor#addEditableKey(int)} with the |
| * {@link MediaMetadataEditor#RATING_KEY_BY_USER} key), it will enable the user to rate |
| * the media, with values being received through the interface set with |
| * {@link #setMetadataUpdateListener(OnMetadataUpdateListener)}. |
| * @see #setTransportControlFlags(int) |
| */ |
| public final static int FLAG_KEY_MEDIA_RATING = 1 << 9; |
| |
| /** |
| * @hide |
| * The flags for when no media keys are declared supported. |
| * Intentionally hidden as an application shouldn't set the transport control flags |
| * to this value. |
| */ |
| public final static int FLAGS_KEY_MEDIA_NONE = 0; |
| |
| /** |
| * @hide |
| * Flag used to signal some type of metadata exposed by the RemoteControlClient is requested. |
| */ |
| public final static int FLAG_INFORMATION_REQUEST_METADATA = 1 << 0; |
| /** |
| * @hide |
| * Flag used to signal that the transport control buttons supported by the |
| * RemoteControlClient are requested. |
| * This can for instance happen when playback is at the end of a playlist, and the "next" |
| * operation is not supported anymore. |
| */ |
| public final static int FLAG_INFORMATION_REQUEST_KEY_MEDIA = 1 << 1; |
| /** |
| * @hide |
| * Flag used to signal that the playback state of the RemoteControlClient is requested. |
| */ |
| public final static int FLAG_INFORMATION_REQUEST_PLAYSTATE = 1 << 2; |
| /** |
| * @hide |
| * Flag used to signal that the album art for the RemoteControlClient is requested. |
| */ |
| public final static int FLAG_INFORMATION_REQUEST_ALBUM_ART = 1 << 3; |
| |
| private MediaSession mSession; |
| |
| /** |
| * Class constructor. |
| * @param mediaButtonIntent The intent that will be sent for the media button events sent |
| * by remote controls. |
| * This intent needs to have been constructed with the {@link Intent#ACTION_MEDIA_BUTTON} |
| * action, and have a component that will handle the intent (set with |
| * {@link Intent#setComponent(ComponentName)}) registered with |
| * {@link AudioManager#registerMediaButtonEventReceiver(ComponentName)} |
| * before this new RemoteControlClient can itself be registered with |
| * {@link AudioManager#registerRemoteControlClient(RemoteControlClient)}. |
| * @see AudioManager#registerMediaButtonEventReceiver(ComponentName) |
| * @see AudioManager#registerRemoteControlClient(RemoteControlClient) |
| */ |
| public RemoteControlClient(PendingIntent mediaButtonIntent) { |
| mRcMediaIntent = mediaButtonIntent; |
| |
| Looper looper; |
| if ((looper = Looper.myLooper()) != null) { |
| mEventHandler = new EventHandler(this, looper); |
| } else if ((looper = Looper.getMainLooper()) != null) { |
| mEventHandler = new EventHandler(this, looper); |
| } else { |
| mEventHandler = null; |
| Log.e(TAG, "RemoteControlClient() couldn't find main application thread"); |
| } |
| } |
| |
| /** |
| * Class constructor for a remote control client whose internal event handling |
| * happens on a user-provided Looper. |
| * @param mediaButtonIntent The intent that will be sent for the media button events sent |
| * by remote controls. |
| * This intent needs to have been constructed with the {@link Intent#ACTION_MEDIA_BUTTON} |
| * action, and have a component that will handle the intent (set with |
| * {@link Intent#setComponent(ComponentName)}) registered with |
| * {@link AudioManager#registerMediaButtonEventReceiver(ComponentName)} |
| * before this new RemoteControlClient can itself be registered with |
| * {@link AudioManager#registerRemoteControlClient(RemoteControlClient)}. |
| * @param looper The Looper running the event loop. |
| * @see AudioManager#registerMediaButtonEventReceiver(ComponentName) |
| * @see AudioManager#registerRemoteControlClient(RemoteControlClient) |
| */ |
| public RemoteControlClient(PendingIntent mediaButtonIntent, Looper looper) { |
| mRcMediaIntent = mediaButtonIntent; |
| |
| mEventHandler = new EventHandler(this, looper); |
| } |
| |
| /** |
| * @hide |
| */ |
| public void registerWithSession(MediaSessionLegacyHelper helper) { |
| helper.addRccListener(mRcMediaIntent, mTransportListener); |
| mSession = helper.getSession(mRcMediaIntent); |
| setTransportControlFlags(mTransportControlFlags); |
| } |
| |
| /** |
| * @hide |
| */ |
| public void unregisterWithSession(MediaSessionLegacyHelper helper) { |
| helper.removeRccListener(mRcMediaIntent); |
| mSession = null; |
| } |
| |
| /** |
| * Get a {@link MediaSession} associated with this RCC. It will only have a |
| * session while it is registered with |
| * {@link AudioManager#registerRemoteControlClient}. The session returned |
| * should not be modified directly by the application but may be used with |
| * other APIs that require a session. |
| * |
| * @return A media session object or null. |
| */ |
| public MediaSession getMediaSession() { |
| return mSession; |
| } |
| |
| /** |
| * Class used to modify metadata in a {@link RemoteControlClient} object. |
| * Use {@link RemoteControlClient#editMetadata(boolean)} to create an instance of an editor, |
| * on which you set the metadata for the RemoteControlClient instance. Once all the information |
| * has been set, use {@link #apply()} to make it the new metadata that should be displayed |
| * for the associated client. Once the metadata has been "applied", you cannot reuse this |
| * instance of the MetadataEditor. |
| * |
| * @deprecated Use {@link MediaMetadata} and {@link MediaSession} instead. |
| */ |
| @Deprecated public class MetadataEditor extends MediaMetadataEditor { |
| |
| // only use RemoteControlClient.editMetadata() to get a MetadataEditor instance |
| private MetadataEditor() { } |
| /** |
| * @hide |
| */ |
| public Object clone() throws CloneNotSupportedException { |
| throw new CloneNotSupportedException(); |
| } |
| |
| /** |
| * The metadata key for the content artwork / album art. |
| */ |
| public final static int BITMAP_KEY_ARTWORK = 100; |
| |
| /** |
| * @hide |
| * TODO(jmtrivi) have lockscreen move to the new key name and remove |
| */ |
| public final static int METADATA_KEY_ARTWORK = BITMAP_KEY_ARTWORK; |
| |
| /** |
| * Adds textual information to be displayed. |
| * Note that none of the information added after {@link #apply()} has been called, |
| * will be displayed. |
| * @param key The identifier of a the metadata field to set. Valid values are |
| * {@link android.media.MediaMetadataRetriever#METADATA_KEY_ALBUM}, |
| * {@link android.media.MediaMetadataRetriever#METADATA_KEY_ALBUMARTIST}, |
| * {@link android.media.MediaMetadataRetriever#METADATA_KEY_TITLE}, |
| * {@link android.media.MediaMetadataRetriever#METADATA_KEY_ARTIST}, |
| * {@link android.media.MediaMetadataRetriever#METADATA_KEY_AUTHOR}, |
| * {@link android.media.MediaMetadataRetriever#METADATA_KEY_COMPILATION}, |
| * {@link android.media.MediaMetadataRetriever#METADATA_KEY_COMPOSER}, |
| * {@link android.media.MediaMetadataRetriever#METADATA_KEY_DATE}, |
| * {@link android.media.MediaMetadataRetriever#METADATA_KEY_GENRE}, |
| * {@link android.media.MediaMetadataRetriever#METADATA_KEY_TITLE}, |
| * {@link android.media.MediaMetadataRetriever#METADATA_KEY_WRITER}. |
| * @param value The text for the given key, or {@code null} to signify there is no valid |
| * information for the field. |
| * @return Returns a reference to the same MetadataEditor object, so you can chain put |
| * calls together. |
| */ |
| public synchronized MetadataEditor putString(int key, String value) |
| throws IllegalArgumentException { |
| super.putString(key, value); |
| if (mMetadataBuilder != null) { |
| // MediaMetadata supports all the same fields as MetadataEditor |
| String metadataKey = MediaMetadata.getKeyFromMetadataEditorKey(key); |
| // But just in case, don't add things we don't understand |
| if (metadataKey != null) { |
| mMetadataBuilder.putText(metadataKey, value); |
| } |
| } |
| |
| return this; |
| } |
| |
| /** |
| * Adds numerical information to be displayed. |
| * Note that none of the information added after {@link #apply()} has been called, |
| * will be displayed. |
| * @param key the identifier of a the metadata field to set. Valid values are |
| * {@link android.media.MediaMetadataRetriever#METADATA_KEY_CD_TRACK_NUMBER}, |
| * {@link android.media.MediaMetadataRetriever#METADATA_KEY_DISC_NUMBER}, |
| * {@link android.media.MediaMetadataRetriever#METADATA_KEY_DURATION} (with a value |
| * expressed in milliseconds), |
| * {@link android.media.MediaMetadataRetriever#METADATA_KEY_YEAR}. |
| * @param value The long value for the given key |
| * @return Returns a reference to the same MetadataEditor object, so you can chain put |
| * calls together. |
| * @throws IllegalArgumentException |
| */ |
| public synchronized MetadataEditor putLong(int key, long value) |
| throws IllegalArgumentException { |
| super.putLong(key, value); |
| if (mMetadataBuilder != null) { |
| // MediaMetadata supports all the same fields as MetadataEditor |
| String metadataKey = MediaMetadata.getKeyFromMetadataEditorKey(key); |
| // But just in case, don't add things we don't understand |
| if (metadataKey != null) { |
| mMetadataBuilder.putLong(metadataKey, value); |
| } |
| } |
| return this; |
| } |
| |
| /** |
| * Sets the album / artwork picture to be displayed on the remote control. |
| * @param key the identifier of the bitmap to set. The only valid value is |
| * {@link #BITMAP_KEY_ARTWORK} |
| * @param bitmap The bitmap for the artwork, or null if there isn't any. |
| * @return Returns a reference to the same MetadataEditor object, so you can chain put |
| * calls together. |
| * @throws IllegalArgumentException |
| * @see android.graphics.Bitmap |
| */ |
| @Override |
| public synchronized MetadataEditor putBitmap(int key, Bitmap bitmap) |
| throws IllegalArgumentException { |
| super.putBitmap(key, bitmap); |
| if (mMetadataBuilder != null) { |
| // MediaMetadata supports all the same fields as MetadataEditor |
| String metadataKey = MediaMetadata.getKeyFromMetadataEditorKey(key); |
| // But just in case, don't add things we don't understand |
| if (metadataKey != null) { |
| mMetadataBuilder.putBitmap(metadataKey, bitmap); |
| } |
| } |
| return this; |
| } |
| |
| /** |
| * Clears all the metadata that has been set since the MetadataEditor instance was created |
| * (with {@link RemoteControlClient#editMetadata(boolean)}). |
| * Note that clearing the metadata doesn't reset the editable keys |
| * (use {@link MediaMetadataEditor#removeEditableKeys()} instead). |
| */ |
| @Override |
| public synchronized void clear() { |
| super.clear(); |
| } |
| |
| /** |
| * Associates all the metadata that has been set since the MetadataEditor instance was |
| * created with {@link RemoteControlClient#editMetadata(boolean)}, or since |
| * {@link #clear()} was called, with the RemoteControlClient. Once "applied", |
| * this MetadataEditor cannot be reused to edit the RemoteControlClient's metadata. |
| */ |
| public synchronized void apply() { |
| if (mApplied) { |
| Log.e(TAG, "Can't apply a previously applied MetadataEditor"); |
| return; |
| } |
| synchronized (mCacheLock) { |
| // Still build the old metadata so when creating a new editor |
| // you get the expected values. |
| // assign the edited data |
| mMetadata = new Bundle(mEditorMetadata); |
| // add the information about editable keys |
| mMetadata.putLong(String.valueOf(KEY_EDITABLE_MASK), mEditableKeys); |
| if ((mOriginalArtwork != null) && (!mOriginalArtwork.equals(mEditorArtwork))) { |
| mOriginalArtwork.recycle(); |
| } |
| mOriginalArtwork = mEditorArtwork; |
| mEditorArtwork = null; |
| |
| // USE_SESSIONS |
| if (mSession != null && mMetadataBuilder != null) { |
| mSession.setMetadata(mMetadataBuilder.build()); |
| } |
| mApplied = true; |
| } |
| } |
| } |
| |
| /** |
| * Creates a {@link MetadataEditor}. |
| * @param startEmpty Set to false if you want the MetadataEditor to contain the metadata that |
| * was previously applied to the RemoteControlClient, or true if it is to be created empty. |
| * @return a new MetadataEditor instance. |
| */ |
| public MetadataEditor editMetadata(boolean startEmpty) { |
| MetadataEditor editor = new MetadataEditor(); |
| if (startEmpty) { |
| editor.mEditorMetadata = new Bundle(); |
| editor.mEditorArtwork = null; |
| editor.mMetadataChanged = true; |
| editor.mArtworkChanged = true; |
| editor.mEditableKeys = 0; |
| } else { |
| editor.mEditorMetadata = new Bundle(mMetadata); |
| editor.mEditorArtwork = mOriginalArtwork; |
| editor.mMetadataChanged = false; |
| editor.mArtworkChanged = false; |
| } |
| // USE_SESSIONS |
| if (startEmpty || mMediaMetadata == null) { |
| editor.mMetadataBuilder = new MediaMetadata.Builder(); |
| } else { |
| editor.mMetadataBuilder = new MediaMetadata.Builder(mMediaMetadata); |
| } |
| return editor; |
| } |
| |
| /** |
| * Sets the current playback state. |
| * @param state The current playback state, one of the following values: |
| * {@link #PLAYSTATE_STOPPED}, |
| * {@link #PLAYSTATE_PAUSED}, |
| * {@link #PLAYSTATE_PLAYING}, |
| * {@link #PLAYSTATE_FAST_FORWARDING}, |
| * {@link #PLAYSTATE_REWINDING}, |
| * {@link #PLAYSTATE_SKIPPING_FORWARDS}, |
| * {@link #PLAYSTATE_SKIPPING_BACKWARDS}, |
| * {@link #PLAYSTATE_BUFFERING}, |
| * {@link #PLAYSTATE_ERROR}. |
| */ |
| public void setPlaybackState(int state) { |
| setPlaybackStateInt(state, PLAYBACK_POSITION_ALWAYS_UNKNOWN, PLAYBACK_SPEED_1X, |
| false /* legacy API, converting to method with position and speed */); |
| } |
| |
| /** |
| * Sets the current playback state and the matching media position for the current playback |
| * speed. |
| * @param state The current playback state, one of the following values: |
| * {@link #PLAYSTATE_STOPPED}, |
| * {@link #PLAYSTATE_PAUSED}, |
| * {@link #PLAYSTATE_PLAYING}, |
| * {@link #PLAYSTATE_FAST_FORWARDING}, |
| * {@link #PLAYSTATE_REWINDING}, |
| * {@link #PLAYSTATE_SKIPPING_FORWARDS}, |
| * {@link #PLAYSTATE_SKIPPING_BACKWARDS}, |
| * {@link #PLAYSTATE_BUFFERING}, |
| * {@link #PLAYSTATE_ERROR}. |
| * @param timeInMs a 0 or positive value for the current media position expressed in ms |
| * (same unit as for when sending the media duration, if applicable, with |
| * {@link android.media.MediaMetadataRetriever#METADATA_KEY_DURATION} in the |
| * {@link RemoteControlClient.MetadataEditor}). Negative values imply that position is not |
| * known (e.g. listening to a live stream of a radio) or not applicable (e.g. when state |
| * is {@link #PLAYSTATE_BUFFERING} and nothing had played yet). |
| * @param playbackSpeed a value expressed as a ratio of 1x playback: 1.0f is normal playback, |
| * 2.0f is 2x, 0.5f is half-speed, -2.0f is rewind at 2x speed. 0.0f means nothing is |
| * playing (e.g. when state is {@link #PLAYSTATE_ERROR}). |
| */ |
| public void setPlaybackState(int state, long timeInMs, float playbackSpeed) { |
| setPlaybackStateInt(state, timeInMs, playbackSpeed, true); |
| } |
| |
| private void setPlaybackStateInt(int state, long timeInMs, float playbackSpeed, |
| boolean hasPosition) { |
| synchronized(mCacheLock) { |
| if ((mPlaybackState != state) || (mPlaybackPositionMs != timeInMs) |
| || (mPlaybackSpeed != playbackSpeed)) { |
| // store locally |
| mPlaybackState = state; |
| // distinguish between an application not knowing the current playback position |
| // at the moment and an application using the API where only the playback state |
| // is passed, not the playback position. |
| if (hasPosition) { |
| if (timeInMs < 0) { |
| mPlaybackPositionMs = PLAYBACK_POSITION_INVALID; |
| } else { |
| mPlaybackPositionMs = timeInMs; |
| } |
| } else { |
| mPlaybackPositionMs = PLAYBACK_POSITION_ALWAYS_UNKNOWN; |
| } |
| mPlaybackSpeed = playbackSpeed; |
| // keep track of when the state change occurred |
| mPlaybackStateChangeTimeMs = SystemClock.elapsedRealtime(); |
| |
| // USE_SESSIONS |
| if (mSession != null) { |
| int pbState = PlaybackState.getStateFromRccState(state); |
| long position = hasPosition ? mPlaybackPositionMs |
| : PlaybackState.PLAYBACK_POSITION_UNKNOWN; |
| |
| PlaybackState.Builder bob = new PlaybackState.Builder(mSessionPlaybackState); |
| bob.setState(pbState, position, playbackSpeed, SystemClock.elapsedRealtime()); |
| bob.setErrorMessage(null); |
| mSessionPlaybackState = bob.build(); |
| mSession.setPlaybackState(mSessionPlaybackState); |
| } |
| } |
| } |
| } |
| |
| // TODO investigate if we still need position drift checking |
| private void onPositionDriftCheck() { |
| if (DEBUG) { Log.d(TAG, "onPositionDriftCheck()"); } |
| synchronized(mCacheLock) { |
| if ((mEventHandler == null) || (mPositionProvider == null) || !mNeedsPositionSync) { |
| return; |
| } |
| if ((mPlaybackPositionMs < 0) || (mPlaybackSpeed == 0.0f)) { |
| if (DEBUG) { Log.d(TAG, " no valid position or 0 speed, no check needed"); } |
| return; |
| } |
| long estPos = mPlaybackPositionMs + (long) |
| ((SystemClock.elapsedRealtime() - mPlaybackStateChangeTimeMs) / mPlaybackSpeed); |
| long actPos = mPositionProvider.onGetPlaybackPosition(); |
| if (actPos >= 0) { |
| if (Math.abs(estPos - actPos) > POSITION_DRIFT_MAX_MS) { |
| // drift happened, report the new position |
| if (DEBUG) { Log.w(TAG, " drift detected: actual=" +actPos +" est=" +estPos); } |
| setPlaybackState(mPlaybackState, actPos, mPlaybackSpeed); |
| } else { |
| if (DEBUG) { Log.d(TAG, " no drift: actual=" + actPos +" est=" + estPos); } |
| // no drift, schedule the next drift check |
| mEventHandler.sendMessageDelayed( |
| mEventHandler.obtainMessage(MSG_POSITION_DRIFT_CHECK), |
| getCheckPeriodFromSpeed(mPlaybackSpeed)); |
| } |
| } else { |
| // invalid position (negative value), can't check for drift |
| mEventHandler.removeMessages(MSG_POSITION_DRIFT_CHECK); |
| } |
| } |
| } |
| |
| /** |
| * Sets the flags for the media transport control buttons that this client supports. |
| * @param transportControlFlags A combination of the following flags: |
| * {@link #FLAG_KEY_MEDIA_PREVIOUS}, |
| * {@link #FLAG_KEY_MEDIA_REWIND}, |
| * {@link #FLAG_KEY_MEDIA_PLAY}, |
| * {@link #FLAG_KEY_MEDIA_PLAY_PAUSE}, |
| * {@link #FLAG_KEY_MEDIA_PAUSE}, |
| * {@link #FLAG_KEY_MEDIA_STOP}, |
| * {@link #FLAG_KEY_MEDIA_FAST_FORWARD}, |
| * {@link #FLAG_KEY_MEDIA_NEXT}, |
| * {@link #FLAG_KEY_MEDIA_POSITION_UPDATE}, |
| * {@link #FLAG_KEY_MEDIA_RATING}. |
| */ |
| public void setTransportControlFlags(int transportControlFlags) { |
| synchronized(mCacheLock) { |
| // store locally |
| mTransportControlFlags = transportControlFlags; |
| |
| // USE_SESSIONS |
| if (mSession != null) { |
| PlaybackState.Builder bob = new PlaybackState.Builder(mSessionPlaybackState); |
| bob.setActions( |
| PlaybackState.getActionsFromRccControlFlags(transportControlFlags)); |
| mSessionPlaybackState = bob.build(); |
| mSession.setPlaybackState(mSessionPlaybackState); |
| } |
| } |
| } |
| |
| /** |
| * Interface definition for a callback to be invoked when one of the metadata values has |
| * been updated. |
| * Implement this interface to receive metadata updates after registering your listener |
| * through {@link RemoteControlClient#setMetadataUpdateListener(OnMetadataUpdateListener)}. |
| */ |
| public interface OnMetadataUpdateListener { |
| /** |
| * Called on the implementer to notify that the metadata field for the given key has |
| * been updated to the new value. |
| * @param key the identifier of the updated metadata field. |
| * @param newValue the Object storing the new value for the key. |
| */ |
| public abstract void onMetadataUpdate(int key, Object newValue); |
| } |
| |
| /** |
| * Sets the listener to be called whenever the metadata is updated. |
| * New metadata values will be received in the same thread as the one in which |
| * RemoteControlClient was created. |
| * @param l the metadata update listener |
| */ |
| public void setMetadataUpdateListener(OnMetadataUpdateListener l) { |
| synchronized(mCacheLock) { |
| mMetadataUpdateListener = l; |
| } |
| } |
| |
| |
| /** |
| * Interface definition for a callback to be invoked when the media playback position is |
| * requested to be updated. |
| * @see RemoteControlClient#FLAG_KEY_MEDIA_POSITION_UPDATE |
| */ |
| public interface OnPlaybackPositionUpdateListener { |
| /** |
| * Called on the implementer to notify it that the playback head should be set at the given |
| * position. If the position can be changed from its current value, the implementor of |
| * the interface must also update the playback position using |
| * {@link #setPlaybackState(int, long, float)} to reflect the actual new |
| * position being used, regardless of whether it differs from the requested position. |
| * Failure to do so would cause the system to not know the new actual playback position, |
| * and user interface components would fail to show the user where playback resumed after |
| * the position was updated. |
| * @param newPositionMs the new requested position in the current media, expressed in ms. |
| */ |
| void onPlaybackPositionUpdate(long newPositionMs); |
| } |
| |
| /** |
| * Interface definition for a callback to be invoked when the media playback position is |
| * queried. |
| * @see RemoteControlClient#FLAG_KEY_MEDIA_POSITION_UPDATE |
| */ |
| public interface OnGetPlaybackPositionListener { |
| /** |
| * Called on the implementer of the interface to query the current playback position. |
| * @return a negative value if the current playback position (or the last valid playback |
| * position) is not known, or a zero or positive value expressed in ms indicating the |
| * current position, or the last valid known position. |
| */ |
| long onGetPlaybackPosition(); |
| } |
| |
| /** |
| * Sets the listener to be called whenever the media playback position is requested |
| * to be updated. |
| * Notifications will be received in the same thread as the one in which RemoteControlClient |
| * was created. |
| * @param l the position update listener to be called |
| */ |
| public void setPlaybackPositionUpdateListener(OnPlaybackPositionUpdateListener l) { |
| synchronized(mCacheLock) { |
| mPositionUpdateListener = l; |
| } |
| } |
| |
| /** |
| * Sets the listener to be called whenever the media current playback position is needed. |
| * Queries will be received in the same thread as the one in which RemoteControlClient |
| * was created. |
| * @param l the listener to be called to retrieve the playback position |
| */ |
| public void setOnGetPlaybackPositionListener(OnGetPlaybackPositionListener l) { |
| synchronized(mCacheLock) { |
| mPositionProvider = l; |
| if ((mPositionProvider != null) && (mEventHandler != null) |
| && playbackPositionShouldMove(mPlaybackState)) { |
| // playback position is already moving, but now we have a position provider, |
| // so schedule a drift check right now |
| mEventHandler.sendMessageDelayed( |
| mEventHandler.obtainMessage(MSG_POSITION_DRIFT_CHECK), |
| 0 /*check now*/); |
| } |
| } |
| } |
| |
| /** |
| * @hide |
| * Flag to reflect that the application controlling this RemoteControlClient sends playback |
| * position updates. The playback position being "readable" is considered from the application's |
| * point of view. |
| */ |
| public static int MEDIA_POSITION_READABLE = 1 << 0; |
| /** |
| * @hide |
| * Flag to reflect that the application controlling this RemoteControlClient can receive |
| * playback position updates. The playback position being "writable" |
| * is considered from the application's point of view. |
| */ |
| public static int MEDIA_POSITION_WRITABLE = 1 << 1; |
| |
| /** @hide */ |
| public final static int DEFAULT_PLAYBACK_VOLUME_HANDLING = PLAYBACK_VOLUME_VARIABLE; |
| /** @hide */ |
| // hard-coded to the same number of steps as AudioService.MAX_STREAM_VOLUME[STREAM_MUSIC] |
| public final static int DEFAULT_PLAYBACK_VOLUME = 15; |
| |
| /** |
| * Lock for all cached data |
| */ |
| private final Object mCacheLock = new Object(); |
| /** |
| * Cache for the playback state. |
| * Access synchronized on mCacheLock |
| */ |
| private int mPlaybackState = PLAYSTATE_NONE; |
| /** |
| * Time of last play state change |
| * Access synchronized on mCacheLock |
| */ |
| private long mPlaybackStateChangeTimeMs = 0; |
| /** |
| * Last playback position in ms reported by the user |
| */ |
| private long mPlaybackPositionMs = PLAYBACK_POSITION_INVALID; |
| /** |
| * Last playback speed reported by the user |
| */ |
| private float mPlaybackSpeed = PLAYBACK_SPEED_1X; |
| /** |
| * Cache for the artwork bitmap. |
| * Access synchronized on mCacheLock |
| * Artwork and metadata are not kept in one Bundle because the bitmap sometimes needs to be |
| * accessed to be resized, in which case a copy will be made. This would add overhead in |
| * Bundle operations. |
| */ |
| private Bitmap mOriginalArtwork; |
| /** |
| * Cache for the transport control mask. |
| * Access synchronized on mCacheLock |
| */ |
| private int mTransportControlFlags = FLAGS_KEY_MEDIA_NONE; |
| /** |
| * Cache for the metadata strings. |
| * Access synchronized on mCacheLock |
| * This is re-initialized in apply() and so cannot be final. |
| */ |
| private Bundle mMetadata = new Bundle(); |
| /** |
| * Listener registered by user of RemoteControlClient to receive requests for playback position |
| * update requests. |
| */ |
| private OnPlaybackPositionUpdateListener mPositionUpdateListener; |
| /** |
| * Provider registered by user of RemoteControlClient to provide the current playback position. |
| */ |
| private OnGetPlaybackPositionListener mPositionProvider; |
| /** |
| * Listener registered by user of RemoteControlClient to receive edit changes to metadata |
| * it exposes. |
| */ |
| private OnMetadataUpdateListener mMetadataUpdateListener; |
| /** |
| * The current remote control client generation ID across the system, as known by this object |
| */ |
| private int mCurrentClientGenId = -1; |
| |
| /** |
| * The media button intent description associated with this remote control client |
| * (can / should include target component for intent handling, used when persisting media |
| * button event receiver across reboots). |
| */ |
| private final PendingIntent mRcMediaIntent; |
| |
| /** |
| * Reflects whether any "plugged in" IRemoteControlDisplay has mWantsPositonSync set to true. |
| */ |
| // TODO consider using a ref count for IRemoteControlDisplay requiring sync instead |
| private boolean mNeedsPositionSync = false; |
| |
| /** |
| * Cache for the current playback state using Session APIs. |
| */ |
| private PlaybackState mSessionPlaybackState = null; |
| |
| /** |
| * Cache for metadata using Session APIs. This is re-initialized in apply(). |
| */ |
| private MediaMetadata mMediaMetadata; |
| |
| /** |
| * @hide |
| * Accessor to media button intent description (includes target component) |
| */ |
| public PendingIntent getRcMediaIntent() { |
| return mRcMediaIntent; |
| } |
| |
| /** |
| * @hide |
| * Default value for the unique identifier |
| */ |
| public final static int RCSE_ID_UNREGISTERED = -1; |
| |
| // USE_SESSIONS |
| private MediaSession.Callback mTransportListener = new MediaSession.Callback() { |
| |
| @Override |
| public void onSeekTo(long pos) { |
| RemoteControlClient.this.onSeekTo(mCurrentClientGenId, pos); |
| } |
| |
| @Override |
| public void onSetRating(Rating rating) { |
| if ((mTransportControlFlags & FLAG_KEY_MEDIA_RATING) != 0) { |
| onUpdateMetadata(mCurrentClientGenId, MetadataEditor.RATING_KEY_BY_USER, rating); |
| } |
| } |
| }; |
| |
| private EventHandler mEventHandler; |
| private final static int MSG_POSITION_DRIFT_CHECK = 11; |
| |
| private class EventHandler extends Handler { |
| public EventHandler(RemoteControlClient rcc, Looper looper) { |
| super(looper); |
| } |
| |
| @Override |
| public void handleMessage(Message msg) { |
| switch(msg.what) { |
| case MSG_POSITION_DRIFT_CHECK: |
| onPositionDriftCheck(); |
| break; |
| default: |
| Log.e(TAG, "Unknown event " + msg.what + " in RemoteControlClient handler"); |
| } |
| } |
| } |
| |
| //=========================================================== |
| // Message handlers |
| |
| private void onSeekTo(int generationId, long timeMs) { |
| synchronized (mCacheLock) { |
| if ((mCurrentClientGenId == generationId) && (mPositionUpdateListener != null)) { |
| mPositionUpdateListener.onPlaybackPositionUpdate(timeMs); |
| } |
| } |
| } |
| |
| private void onUpdateMetadata(int generationId, int key, Object value) { |
| synchronized (mCacheLock) { |
| if ((mCurrentClientGenId == generationId) && (mMetadataUpdateListener != null)) { |
| mMetadataUpdateListener.onMetadataUpdate(key, value); |
| } |
| } |
| } |
| |
| //=========================================================== |
| // Internal utilities |
| |
| /** |
| * Returns whether, for the given playback state, the playback position is expected to |
| * be changing. |
| * @param playstate the playback state to evaluate |
| * @return true during any form of playback, false if it's not playing anything while in this |
| * playback state |
| */ |
| static boolean playbackPositionShouldMove(int playstate) { |
| switch(playstate) { |
| case PLAYSTATE_STOPPED: |
| case PLAYSTATE_PAUSED: |
| case PLAYSTATE_BUFFERING: |
| case PLAYSTATE_ERROR: |
| case PLAYSTATE_SKIPPING_FORWARDS: |
| case PLAYSTATE_SKIPPING_BACKWARDS: |
| return false; |
| case PLAYSTATE_PLAYING: |
| case PLAYSTATE_FAST_FORWARDING: |
| case PLAYSTATE_REWINDING: |
| default: |
| return true; |
| } |
| } |
| |
| /** |
| * Period for playback position drift checks, 15s when playing at 1x or slower. |
| */ |
| private final static long POSITION_REFRESH_PERIOD_PLAYING_MS = 15000; |
| /** |
| * Minimum period for playback position drift checks, never more often when every 2s, when |
| * fast forwarding or rewinding. |
| */ |
| private final static long POSITION_REFRESH_PERIOD_MIN_MS = 2000; |
| /** |
| * The value above which the difference between client-reported playback position and |
| * estimated position is considered a drift. |
| */ |
| private final static long POSITION_DRIFT_MAX_MS = 500; |
| /** |
| * Compute the period at which the estimated playback position should be compared against the |
| * actual playback position. Is a funciton of playback speed. |
| * @param speed 1.0f is normal playback speed |
| * @return the period in ms |
| */ |
| private static long getCheckPeriodFromSpeed(float speed) { |
| if (Math.abs(speed) <= 1.0f) { |
| return POSITION_REFRESH_PERIOD_PLAYING_MS; |
| } else { |
| return Math.max((long)(POSITION_REFRESH_PERIOD_PLAYING_MS / Math.abs(speed)), |
| POSITION_REFRESH_PERIOD_MIN_MS); |
| } |
| } |
| } |
