Topics covered here are: *
For more information about how to use MediaPlayer, read the * Media Playback developer guide.
*Playback control of audio/video files and streams is managed as a state * machine. The following diagram shows the life cycle and the states of a * MediaPlayer object driven by the supported playback control operations. * The ovals represent the states a MediaPlayer object may reside * in. The arcs represent the playback control operations that drive the object * state transition. There are two types of arcs. The arcs with a single arrow * head represent synchronous method calls, while those with * a double arrow head represent asynchronous method calls.
* *
From this state diagram, one can see that a MediaPlayer object has the * following states:
*new or
* after {@link #reset()} is called, it is in the Idle state; and after
* {@link #release()} is called, it is in the End state. Between these
* two states is the life cycle of the MediaPlayer object.
* new is in the
* Idle state, while those created with one
* of the overloaded convenient create methods are NOT
* in the Idle state. In fact, the objects are in the Prepared
* state if the creation using create method is successful.
* setDataSource
* methods in an invalid state. IllegalArgumentException
* and IOException that may be thrown from the overloaded
* setDataSource methods.| Method Name | *Valid Sates | *Invalid States | *Comments |
| attachAuxEffect | *{Initialized, Prepared, Started, Paused, Stopped, PlaybackCompleted} | *{Idle, Error} | *This method must be called after setDataSource. * Calling it does not change the object state. |
| getAudioSessionId | *any | *{} | *This method can be called in any state and calling it does not change * the object state. |
| getCurrentPosition | *{Idle, Initialized, Prepared, Started, Paused, Stopped, * PlaybackCompleted} | *{Error} | *Successful invoke of this method in a valid state does not change the * state. Calling this method in an invalid state transfers the object * to the Error state. |
| getDuration | *{Prepared, Started, Paused, Stopped, PlaybackCompleted} | *{Idle, Initialized, Error} | *Successful invoke of this method in a valid state does not change the * state. Calling this method in an invalid state transfers the object * to the Error state. |
| getVideoHeight | *{Idle, Initialized, Prepared, Started, Paused, Stopped, * PlaybackCompleted} | *{Error} | *Successful invoke of this method in a valid state does not change the * state. Calling this method in an invalid state transfers the object * to the Error state. |
| getVideoWidth | *{Idle, Initialized, Prepared, Started, Paused, Stopped, * PlaybackCompleted} | *{Error} | *Successful invoke of this method in a valid state does not change * the state. Calling this method in an invalid state transfers the * object to the Error state. |
| isPlaying | *{Idle, Initialized, Prepared, Started, Paused, Stopped, * PlaybackCompleted} | *{Error} | *Successful invoke of this method in a valid state does not change * the state. Calling this method in an invalid state transfers the * object to the Error state. |
| pause | *{Started, Paused, PlaybackCompleted} | *{Idle, Initialized, Prepared, Stopped, Error} | *Successful invoke of this method in a valid state transfers the * object to the Paused state. Calling this method in an * invalid state transfers the object to the Error state. |
| prepare | *{Initialized, Stopped} | *{Idle, Prepared, Started, Paused, PlaybackCompleted, Error} | *Successful invoke of this method in a valid state transfers the * object to the Prepared state. Calling this method in an * invalid state throws an IllegalStateException. |
| prepareAsync | *{Initialized, Stopped} | *{Idle, Prepared, Started, Paused, PlaybackCompleted, Error} | *Successful invoke of this method in a valid state transfers the * object to the Preparing state. Calling this method in an * invalid state throws an IllegalStateException. |
| release | *any | *{} | *After {@link #release()}, the object is no longer available. |
| reset | *{Idle, Initialized, Prepared, Started, Paused, Stopped, * PlaybackCompleted, Error} | *{} | *After {@link #reset()}, the object is like being just created. |
| seekTo | *{Prepared, Started, Paused, PlaybackCompleted} | *{Idle, Initialized, Stopped, Error} | *Successful invoke of this method in a valid state does not change * the state. Calling this method in an invalid state transfers the * object to the Error state. |
| setAudioAttributes | *{Idle, Initialized, Stopped, Prepared, Started, Paused, * PlaybackCompleted} | *{Error} | *Successful invoke of this method does not change the state. In order for the * target audio attributes type to become effective, this method must be called before * prepare() or prepareAsync(). |
| setAudioSessionId | *{Idle} | *{Initialized, Prepared, Started, Paused, Stopped, PlaybackCompleted, * Error} | *This method must be called in idle state as the audio session ID must be known before * calling setDataSource. Calling it does not change the object state. |
| setAudioStreamType | *{Idle, Initialized, Stopped, Prepared, Started, Paused, * PlaybackCompleted} | *{Error} | *Successful invoke of this method does not change the state. In order for the * target audio stream type to become effective, this method must be called before * prepare() or prepareAsync(). |
| setAuxEffectSendLevel | *any | *{} | *Calling this method does not change the object state. |
| setDataSource | *{Idle} | *{Initialized, Prepared, Started, Paused, Stopped, PlaybackCompleted, * Error} | *Successful invoke of this method in a valid state transfers the * object to the Initialized state. Calling this method in an * invalid state throws an IllegalStateException. |
| setDisplay | *any | *{} | *This method can be called in any state and calling it does not change * the object state. |
| setSurface | *any | *{} | *This method can be called in any state and calling it does not change * the object state. |
| setVideoScalingMode | *{Initialized, Prepared, Started, Paused, Stopped, PlaybackCompleted} | *{Idle, Error} | *Successful invoke of this method does not change the state. |
| setLooping | *{Idle, Initialized, Stopped, Prepared, Started, Paused, * PlaybackCompleted} | *{Error} | *Successful invoke of this method in a valid state does not change * the state. Calling this method in an * invalid state transfers the object to the Error state. |
| isLooping | *any | *{} | *This method can be called in any state and calling it does not change * the object state. |
| setOnBufferingUpdateListener | *any | *{} | *This method can be called in any state and calling it does not change * the object state. |
| setOnCompletionListener | *any | *{} | *This method can be called in any state and calling it does not change * the object state. |
| setOnErrorListener | *any | *{} | *This method can be called in any state and calling it does not change * the object state. |
| setOnPreparedListener | *any | *{} | *This method can be called in any state and calling it does not change * the object state. |
| setOnSeekCompleteListener | *any | *{} | *This method can be called in any state and calling it does not change * the object state. |
| setScreenOnWhilePlaying | *any | *{} | *This method can be called in any state and calling it does not change * the object state. |
| setVolume | *{Idle, Initialized, Stopped, Prepared, Started, Paused, * PlaybackCompleted} | *{Error} | *Successful invoke of this method does not change the state. * |
| setWakeMode | *any | *{} | *This method can be called in any state and calling it does not change * the object state. |
| start | *{Prepared, Started, Paused, PlaybackCompleted} | *{Idle, Initialized, Stopped, Error} | *Successful invoke of this method in a valid state transfers the * object to the Started state. Calling this method in an * invalid state transfers the object to the Error state. |
| stop | *{Prepared, Started, Stopped, Paused, PlaybackCompleted} | *{Idle, Initialized, Error} | *Successful invoke of this method in a valid state transfers the * object to the Stopped state. Calling this method in an * invalid state transfers the object to the Error state. |
| getTrackInfo | *{Prepared, Started, Stopped, Paused, PlaybackCompleted} | *{Idle, Initialized, Error} | *Successful invoke of this method does not change the state. |
| addTimedTextSource | *{Prepared, Started, Stopped, Paused, PlaybackCompleted} | *{Idle, Initialized, Error} | *Successful invoke of this method does not change the state. |
| selectTrack | *{Prepared, Started, Stopped, Paused, PlaybackCompleted} | *{Idle, Initialized, Error} | *Successful invoke of this method does not change the state. |
| deselectTrack | *{Prepared, Started, Stopped, Paused, PlaybackCompleted} | *{Idle, Initialized, Error} | *Successful invoke of this method does not change the state. |
One may need to declare a corresponding WAKE_LOCK permission {@link * android.R.styleable#AndroidManifestUsesPermission <uses-permission>} * element. * *
This class requires the {@link android.Manifest.permission#INTERNET} permission * when used with network-based content. * * *
Applications may want to register for informational and error * events in order to be informed of some internal state update and * possible runtime errors during playback or streaming. Registration for * these events is done by properly setting the appropriate listeners (via calls * to * {@link #setOnPreparedListener(OnPreparedListener)}setOnPreparedListener, * {@link #setOnVideoSizeChangedListener(OnVideoSizeChangedListener)}setOnVideoSizeChangedListener, * {@link #setOnSeekCompleteListener(OnSeekCompleteListener)}setOnSeekCompleteListener, * {@link #setOnCompletionListener(OnCompletionListener)}setOnCompletionListener, * {@link #setOnBufferingUpdateListener(OnBufferingUpdateListener)}setOnBufferingUpdateListener, * {@link #setOnInfoListener(OnInfoListener)}setOnInfoListener, * {@link #setOnErrorListener(OnErrorListener)}setOnErrorListener, etc). * In order to receive the respective callback * associated with these listeners, applications are required to create * MediaPlayer objects on a thread with its own Looper running (main UI * thread by default has a Looper running). * */ public class MediaPlayer implements SubtitleController.Listener { /** Constant to retrieve only the new metadata since the last call. // FIXME: unhide. // FIXME: add link to getMetadata(boolean, boolean) {@hide} */ public static final boolean METADATA_UPDATE_ONLY = true; /** Constant to retrieve all the metadata. // FIXME: unhide. // FIXME: add link to getMetadata(boolean, boolean) {@hide} */ public static final boolean METADATA_ALL = false; /** Constant to enable the metadata filter during retrieval. // FIXME: unhide. // FIXME: add link to getMetadata(boolean, boolean) {@hide} */ public static final boolean APPLY_METADATA_FILTER = true; /** Constant to disable the metadata filter during retrieval. // FIXME: unhide. // FIXME: add link to getMetadata(boolean, boolean) {@hide} */ public static final boolean BYPASS_METADATA_FILTER = false; static { System.loadLibrary("media_jni"); native_init(); } private final static String TAG = "MediaPlayer"; // Name of the remote interface for the media player. Must be kept // in sync with the 2nd parameter of the IMPLEMENT_META_INTERFACE // macro invocation in IMediaPlayer.cpp private final static String IMEDIA_PLAYER = "android.media.IMediaPlayer"; private long mNativeContext; // accessed by native methods private long mNativeSurfaceTexture; // accessed by native methods private int mListenerContext; // accessed by native methods private SurfaceHolder mSurfaceHolder; private EventHandler mEventHandler; private PowerManager.WakeLock mWakeLock = null; private boolean mScreenOnWhilePlaying; private boolean mStayAwake; private final IAppOpsService mAppOps; private int mStreamType = AudioManager.USE_DEFAULT_STREAM_TYPE; private int mUsage = -1; /** * Default constructor. Consider using one of the create() methods for * synchronously instantiating a MediaPlayer from a Uri or resource. *
When done with the MediaPlayer, you should call {@link #release()}, * to free the resources. If not released, too many MediaPlayer instances may * result in an exception.
*/ public MediaPlayer() { 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; } mTimeProvider = new TimeProvider(this); mOutOfBandSubtitleTracks = new VectorThe supported video scaling modes are: *
When done with the MediaPlayer, you should call {@link #release()}, * to free the resources. If not released, too many MediaPlayer instances will * result in an exception.
*Note that since {@link #prepare()} is called automatically in this method, * you cannot change the audio stream type (see {@link #setAudioStreamType(int)}), audio * session ID (see {@link #setAudioSessionId(int)}) or audio attributes * (see {@link #setAudioAttributes(AudioAttributes)} of the new MediaPlayer.
* * @param context the Context to use * @param uri the Uri from which to get the datasource * @return a MediaPlayer object, or null if creation failed */ public static MediaPlayer create(Context context, Uri uri) { return create (context, uri, null); } /** * Convenience method to create a MediaPlayer for a given Uri. * On success, {@link #prepare()} will already have been called and must not be called again. *When done with the MediaPlayer, you should call {@link #release()}, * to free the resources. If not released, too many MediaPlayer instances will * result in an exception.
*Note that since {@link #prepare()} is called automatically in this method, * you cannot change the audio stream type (see {@link #setAudioStreamType(int)}), audio * session ID (see {@link #setAudioSessionId(int)}) or audio attributes * (see {@link #setAudioAttributes(AudioAttributes)} of the new MediaPlayer.
* * @param context the Context to use * @param uri the Uri from which to get the datasource * @param holder the SurfaceHolder to use for displaying the video * @return a MediaPlayer object, or null if creation failed */ public static MediaPlayer create(Context context, Uri uri, SurfaceHolder holder) { int s = AudioSystem.newAudioSessionId(); return create(context, uri, holder, null, s > 0 ? s : 0); } /** * Same factory method as {@link #create(Context, Uri, SurfaceHolder)} but that lets you specify * the audio attributes and session ID to be used by the new MediaPlayer instance. * @param context the Context to use * @param uri the Uri from which to get the datasource * @param holder the SurfaceHolder to use for displaying the video, may be null. * @param audioAttributes the {@link AudioAttributes} to be used by the media player. * @param audioSessionId the audio session ID to be used by the media player, * see {@link AudioManager#generateAudioSessionId()} to obtain a new session. * @return a MediaPlayer object, or null if creation failed */ public static MediaPlayer create(Context context, Uri uri, SurfaceHolder holder, AudioAttributes audioAttributes, int audioSessionId) { try { MediaPlayer mp = new MediaPlayer(); final AudioAttributes aa = audioAttributes != null ? audioAttributes : new AudioAttributes.Builder().build(); mp.setAudioAttributes(aa); mp.setAudioSessionId(audioSessionId); mp.setDataSource(context, uri); if (holder != null) { mp.setDisplay(holder); } mp.prepare(); return mp; } catch (IOException ex) { Log.d(TAG, "create failed:", ex); // fall through } catch (IllegalArgumentException ex) { Log.d(TAG, "create failed:", ex); // fall through } catch (SecurityException ex) { Log.d(TAG, "create failed:", ex); // fall through } return null; } // Note no convenience method to create a MediaPlayer with SurfaceTexture sink. /** * Convenience method to create a MediaPlayer for a given resource id. * On success, {@link #prepare()} will already have been called and must not be called again. *When done with the MediaPlayer, you should call {@link #release()}, * to free the resources. If not released, too many MediaPlayer instances will * result in an exception.
*Note that since {@link #prepare()} is called automatically in this method, * you cannot change the audio stream type (see {@link #setAudioStreamType(int)}), audio * session ID (see {@link #setAudioSessionId(int)}) or audio attributes * (see {@link #setAudioAttributes(AudioAttributes)} of the new MediaPlayer.
* * @param context the Context to use * @param resid the raw resource id (R.raw.<something>) for * the resource to use as the datasource * @return a MediaPlayer object, or null if creation failed */ public static MediaPlayer create(Context context, int resid) { int s = AudioSystem.newAudioSessionId(); return create(context, resid, null, s > 0 ? s : 0); } /** * Same factory method as {@link #create(Context, int)} but that lets you specify the audio * attributes and session ID to be used by the new MediaPlayer instance. * @param context the Context to use * @param resid the raw resource id (R.raw.<something>) for * the resource to use as the datasource * @param audioAttributes the {@link AudioAttributes} to be used by the media player. * @param audioSessionId the audio session ID to be used by the media player, * see {@link AudioManager#generateAudioSessionId()} to obtain a new session. * @return a MediaPlayer object, or null if creation failed */ public static MediaPlayer create(Context context, int resid, AudioAttributes audioAttributes, int audioSessionId) { try { AssetFileDescriptor afd = context.getResources().openRawResourceFd(resid); if (afd == null) return null; MediaPlayer mp = new MediaPlayer(); final AudioAttributes aa = audioAttributes != null ? audioAttributes : new AudioAttributes.Builder().build(); mp.setAudioAttributes(aa); mp.setAudioSessionId(audioSessionId); mp.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength()); afd.close(); mp.prepare(); return mp; } catch (IOException ex) { Log.d(TAG, "create failed:", ex); // fall through } catch (IllegalArgumentException ex) { Log.d(TAG, "create failed:", ex); // fall through } catch (SecurityException ex) { Log.d(TAG, "create failed:", ex); // fall through } return null; } /** * Sets the data source as a content Uri. * * @param context the Context to use when resolving the Uri * @param uri the Content URI of the data you want to play * @throws IllegalStateException if it is called in an invalid state */ public void setDataSource(Context context, Uri uri) throws IOException, IllegalArgumentException, SecurityException, IllegalStateException { setDataSource(context, uri, null); } /** * Sets the data source as a content Uri. * * @param context the Context to use when resolving the Uri * @param uri the Content URI of the data you want to play * @param headers the headers to be sent together with the request for the data * Note that the cross domain redirection is allowed by default, but that can be * changed with key/value pairs through the headers parameter with * "android-allow-cross-domain-redirect" as the key and "0" or "1" as the value * to disallow or allow cross domain redirection. * @throws IllegalStateException if it is called in an invalid state */ public void setDataSource(Context context, Uri uri, MapWhen This function has the MediaPlayer access the low-level power manager
* service to control the device's power usage while playing is occurring.
* The parameter is a combination of {@link android.os.PowerManager} wake flags.
* Use of this method requires {@link android.Manifest.permission#WAKE_LOCK}
* permission.
* By default, no attempt is made to keep the device awake during playback.
*
* @param context the Context to use
* @param mode the power/wake mode to set
* @see android.os.PowerManager
*/
public void setWakeMode(Context context, int mode) {
boolean washeld = false;
if (mWakeLock != null) {
if (mWakeLock.isHeld()) {
washeld = true;
mWakeLock.release();
}
mWakeLock = null;
}
PowerManager pm = (PowerManager)context.getSystemService(Context.POWER_SERVICE);
mWakeLock = pm.newWakeLock(mode|PowerManager.ON_AFTER_RELEASE, MediaPlayer.class.getName());
mWakeLock.setReferenceCounted(false);
if (washeld) {
mWakeLock.acquire();
}
}
/**
* Control whether we should use the attached SurfaceHolder to keep the
* screen on while video playback is occurring. This is the preferred
* method over {@link #setWakeMode} where possible, since it doesn't
* require that the application have permission for low-level wake lock
* access.
*
* @param screenOn Supply true to keep the screen on, false to allow it
* to turn off.
*/
public void setScreenOnWhilePlaying(boolean screenOn) {
if (mScreenOnWhilePlaying != screenOn) {
if (screenOn && mSurfaceHolder == null) {
Log.w(TAG, "setScreenOnWhilePlaying(true) is ineffective without a SurfaceHolder");
}
mScreenOnWhilePlaying = screenOn;
updateSurfaceScreenOn();
}
}
private void stayAwake(boolean awake) {
if (mWakeLock != null) {
if (awake && !mWakeLock.isHeld()) {
mWakeLock.acquire();
} else if (!awake && mWakeLock.isHeld()) {
mWakeLock.release();
}
}
mStayAwake = awake;
updateSurfaceScreenOn();
}
private void updateSurfaceScreenOn() {
if (mSurfaceHolder != null) {
mSurfaceHolder.setKeepScreenOn(mScreenOnWhilePlaying && mStayAwake);
}
}
/**
* Returns the width of the video.
*
* @return the width of the video, or 0 if there is no video,
* no display surface was set, or the width has not been determined
* yet. The OnVideoSizeChangedListener can be registered via
* {@link #setOnVideoSizeChangedListener(OnVideoSizeChangedListener)}
* to provide a notification when the width is available.
*/
public native int getVideoWidth();
/**
* Returns the height of the video.
*
* @return the height of the video, or 0 if there is no video,
* no display surface was set, or the height has not been determined
* yet. The OnVideoSizeChangedListener can be registered via
* {@link #setOnVideoSizeChangedListener(OnVideoSizeChangedListener)}
* to provide a notification when the height is available.
*/
public native int getVideoHeight();
/**
* Checks whether the MediaPlayer is playing.
*
* @return true if currently playing, false otherwise
* @throws IllegalStateException if the internal player engine has not been
* initialized or has been released.
*/
public native boolean isPlaying();
/**
* Seeks to specified time position.
*
* @param msec the offset in milliseconds from the start to seek to
* @throws IllegalStateException if the internal player engine has not been
* initialized
*/
public native void seekTo(int msec) throws IllegalStateException;
/**
* Gets the current playback position.
*
* @return the current position in milliseconds
*/
public native int getCurrentPosition();
/**
* Gets the duration of the file.
*
* @return the duration in milliseconds, if no duration is available
* (for example, if streaming live content), -1 is returned.
*/
public native int getDuration();
/**
* Gets the media metadata.
*
* @param update_only controls whether the full set of available
* metadata is returned or just the set that changed since the
* last call. See {@see #METADATA_UPDATE_ONLY} and {@see
* #METADATA_ALL}.
*
* @param apply_filter if true only metadata that matches the
* filter is returned. See {@see #APPLY_METADATA_FILTER} and {@see
* #BYPASS_METADATA_FILTER}.
*
* @return The metadata, possibly empty. null if an error occured.
// FIXME: unhide.
* {@hide}
*/
public Metadata getMetadata(final boolean update_only,
final boolean apply_filter) {
Parcel reply = Parcel.obtain();
Metadata data = new Metadata();
if (!native_getMetadata(update_only, apply_filter, reply)) {
reply.recycle();
return null;
}
// Metadata takes over the parcel, don't recycle it unless
// there is an error.
if (!data.parse(reply)) {
reply.recycle();
return null;
}
return data;
}
/**
* Set a filter for the metadata update notification and update
* retrieval. The caller provides 2 set of metadata keys, allowed
* and blocked. The blocked set always takes precedence over the
* allowed one.
* Metadata.MATCH_ALL and Metadata.MATCH_NONE are 2 sets available as
* shorthands to allow/block all or no metadata.
*
* By default, there is no filter set.
*
* @param allow Is the set of metadata the client is interested
* in receiving new notifications for.
* @param block Is the set of metadata the client is not interested
* in receiving new notifications for.
* @return The call status code.
*
// FIXME: unhide.
* {@hide}
*/
public int setMetadataFilter(Set After creating an auxiliary effect (e.g.
* {@link android.media.audiofx.EnvironmentalReverb}), retrieve its ID with
* {@link android.media.audiofx.AudioEffect#getId()} and use it when calling this method
* to attach the player to the effect.
* To detach the effect from the player, call this method with a null effect id.
* This method must be called after one of the overloaded By default the send level is 0, so even if an effect is attached to the player
* this method must be called for the effect to be applied.
* Note that the passed level value is a raw scalar. UI controls should be scaled
* logarithmically: the gain applied by audio framework ranges from -72dB to 0dB,
* so an appropriate conversion from linear UI input x to level is:
* x == 0 -> level = 0
* 0 < x <= R -> level = 10^(72*(x-R)/20/R)
* @param level send level scalar
*/
public void setAuxEffectSendLevel(float level) {
if (isRestricted()) {
return;
}
_setAuxEffectSendLevel(level);
}
private native void _setAuxEffectSendLevel(float level);
/*
* @param request Parcel destinated to the media player. The
* Interface token must be set to the IMediaPlayer
* one to be routed correctly through the system.
* @param reply[out] Parcel that will contain the reply.
* @return The status code.
*/
private native final int native_invoke(Parcel request, Parcel reply);
/*
* @param update_only If true fetch only the set of metadata that have
* changed since the last invocation of getMetadata.
* The set is built using the unfiltered
* notifications the native player sent to the
* MediaPlayerService during that period of
* time. If false, all the metadatas are considered.
* @param apply_filter If true, once the metadata set has been built based on
* the value update_only, the current filter is applied.
* @param reply[out] On return contains the serialized
* metadata. Valid only if the call was successful.
* @return The status code.
*/
private native final boolean native_getMetadata(boolean update_only,
boolean apply_filter,
Parcel reply);
/*
* @param request Parcel with the 2 serialized lists of allowed
* metadata types followed by the one to be
* dropped. Each list starts with an integer
* indicating the number of metadata type elements.
* @return The status code.
*/
private native final int native_setMetadataFilter(Parcel request);
private static native final void native_init();
private native final void native_setup(Object mediaplayer_this);
private native final void native_finalize();
/**
* Class for MediaPlayer to return each audio/video/subtitle track's metadata.
*
* @see android.media.MediaPlayer#getTrackInfo
*/
static public class TrackInfo implements Parcelable {
/**
* Gets the track type.
* @return TrackType which indicates if the track is video, audio, timed text.
*/
public int getTrackType() {
return mTrackType;
}
/**
* Gets the language code of the track.
* @return a language code in either way of ISO-639-1 or ISO-639-2.
* When the language is unknown or could not be determined,
* ISO-639-2 language code, "und", is returned.
*/
public String getLanguage() {
String language = mFormat.getString(MediaFormat.KEY_LANGUAGE);
return language == null ? "und" : language;
}
/**
* Gets the {@link MediaFormat} of the track. If the format is
* unknown or could not be determined, null is returned.
*/
public MediaFormat getFormat() {
if (mTrackType == MEDIA_TRACK_TYPE_TIMEDTEXT
|| mTrackType == MEDIA_TRACK_TYPE_SUBTITLE) {
return mFormat;
}
return null;
}
public static final int MEDIA_TRACK_TYPE_UNKNOWN = 0;
public static final int MEDIA_TRACK_TYPE_VIDEO = 1;
public static final int MEDIA_TRACK_TYPE_AUDIO = 2;
public static final int MEDIA_TRACK_TYPE_TIMEDTEXT = 3;
public static final int MEDIA_TRACK_TYPE_SUBTITLE = 4;
final int mTrackType;
final MediaFormat mFormat;
TrackInfo(Parcel in) {
mTrackType = in.readInt();
// TODO: parcel in the full MediaFormat
String language = in.readString();
if (mTrackType == MEDIA_TRACK_TYPE_TIMEDTEXT) {
mFormat = MediaFormat.createSubtitleFormat(
MEDIA_MIMETYPE_TEXT_SUBRIP, language);
} else if (mTrackType == MEDIA_TRACK_TYPE_SUBTITLE) {
String mime = in.readString();
mFormat = MediaFormat.createSubtitleFormat(mime, language);
mFormat.setInteger(MediaFormat.KEY_IS_AUTOSELECT, in.readInt());
mFormat.setInteger(MediaFormat.KEY_IS_DEFAULT, in.readInt());
mFormat.setInteger(MediaFormat.KEY_IS_FORCED_SUBTITLE, in.readInt());
} else {
mFormat = new MediaFormat();
mFormat.setString(MediaFormat.KEY_LANGUAGE, language);
}
}
/** @hide */
TrackInfo(int type, MediaFormat format) {
mTrackType = type;
mFormat = format;
}
/**
* {@inheritDoc}
*/
@Override
public int describeContents() {
return 0;
}
/**
* {@inheritDoc}
*/
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeInt(mTrackType);
dest.writeString(getLanguage());
if (mTrackType == MEDIA_TRACK_TYPE_SUBTITLE) {
dest.writeString(mFormat.getString(MediaFormat.KEY_MIME));
dest.writeInt(mFormat.getInteger(MediaFormat.KEY_IS_AUTOSELECT));
dest.writeInt(mFormat.getInteger(MediaFormat.KEY_IS_DEFAULT));
dest.writeInt(mFormat.getInteger(MediaFormat.KEY_IS_FORCED_SUBTITLE));
}
}
@Override
public String toString() {
StringBuilder out = new StringBuilder(128);
out.append(getClass().getName());
out.append('{');
switch (mTrackType) {
case MEDIA_TRACK_TYPE_VIDEO:
out.append("VIDEO");
break;
case MEDIA_TRACK_TYPE_AUDIO:
out.append("AUDIO");
break;
case MEDIA_TRACK_TYPE_TIMEDTEXT:
out.append("TIMEDTEXT");
break;
case MEDIA_TRACK_TYPE_SUBTITLE:
out.append("SUBTITLE");
break;
default:
out.append("UNKNOWN");
break;
}
out.append(", " + mFormat.toString());
out.append("}");
return out.toString();
}
/**
* Used to read a TrackInfo from a Parcel.
*/
static final Parcelable.Creator
* If a MediaPlayer is in invalid state, it throws an IllegalStateException exception.
* If a MediaPlayer is in Started state, the selected track is presented immediately.
* If a MediaPlayer is not in Started state, it just marks the track to be played.
*
* In any valid state, if it is called multiple times on the same type of track (ie. Video,
* Audio, Timed Text), the most recent one will be chosen.
*
* The first audio and video tracks are selected by default if available, even though
* this method is not called. However, no timed text track will be selected until
* this function is called.
*
* Currently, only timed text tracks or audio tracks can be selected via this method.
* In addition, the support for selecting an audio track at runtime is pretty limited
* in that an audio track can only be selected in the Prepared state.
*
* Currently, the track must be a timed text track and no audio or video tracks can be
* deselected. If the timed text track identified by index has not been
* selected before, it throws an exception.
* path refers to a local file, the file may actually be opened by a
* process other than the calling application. This implies that the pathname
* should be an absolute path (as any other process runs with unspecified current working
* directory), and that the pathname should reference a world-readable file.
* As an alternative, the application could first open the file for reading,
* and then use the file descriptor form {@link #setDataSource(FileDescriptor)}.
*/
public void setDataSource(String path)
throws IOException, IllegalArgumentException, SecurityException, IllegalStateException {
setDataSource(path, null, null);
}
/**
* Sets the data source (file-path or http/rtsp URL) to use.
*
* @param path the path of the file, or the http/rtsp URL of the stream you want to play
* @param headers the headers associated with the http request for the stream you want to play
* @throws IllegalStateException if it is called in an invalid state
* @hide pending API council
*/
public void setDataSource(String path, Map setDataSource methods.
* @throws IllegalStateException if it is called in an invalid state
*/
public native void setAudioSessionId(int sessionId) throws IllegalArgumentException, IllegalStateException;
/**
* Returns the audio session ID.
*
* @return the audio session ID. {@see #setAudioSessionId(int)}
* Note that the audio session ID is 0 only if a problem occured when the MediaPlayer was contructed.
*/
public native int getAudioSessionId();
/**
* Attaches an auxiliary effect to the player. A typical auxiliary effect is a reverberation
* effect which can be applied on any sound source that directs a certain amount of its
* energy to this effect. This amount is defined by setAuxEffectSendLevel().
* {@see #setAuxEffectSendLevel(float)}.
* setDataSource
* methods.
* @param effectId system wide unique id of the effect to attach
*/
public native void attachAuxEffect(int effectId);
/**
* Sets the send level of the player to the attached auxiliary effect
* {@see #attachAuxEffect(int)}. The level value range is 0 to 1.0.
*
*
* @param extra an extra code, specific to the error. Typically
* implementation dependent.
*
*
* @return True if the method handled the error, false if it didn't.
* Returning false, or not having an OnErrorListener at all, will
* cause the OnCompletionListener to be called.
*/
boolean onError(MediaPlayer mp, int what, int extra);
}
/**
* Register a callback to be invoked when an error has happened
* during an asynchronous operation.
*
* @param listener the callback that will be run
*/
public void setOnErrorListener(OnErrorListener listener)
{
mOnErrorListener = listener;
}
private OnErrorListener mOnErrorListener;
/* Do not change these values without updating their counterparts
* in include/media/mediaplayer.h!
*/
/** Unspecified media player info.
* @see android.media.MediaPlayer.OnInfoListener
*/
public static final int MEDIA_INFO_UNKNOWN = 1;
/** The player was started because it was used as the next player for another
* player, which just completed playback.
* @see android.media.MediaPlayer.OnInfoListener
* @hide
*/
public static final int MEDIA_INFO_STARTED_AS_NEXT = 2;
/** The player just pushed the very first video frame for rendering.
* @see android.media.MediaPlayer.OnInfoListener
*/
public static final int MEDIA_INFO_VIDEO_RENDERING_START = 3;
/** The video is too complex for the decoder: it can't decode frames fast
* enough. Possibly only the audio plays fine at this stage.
* @see android.media.MediaPlayer.OnInfoListener
*/
public static final int MEDIA_INFO_VIDEO_TRACK_LAGGING = 700;
/** MediaPlayer is temporarily pausing playback internally in order to
* buffer more data.
* @see android.media.MediaPlayer.OnInfoListener
*/
public static final int MEDIA_INFO_BUFFERING_START = 701;
/** MediaPlayer is resuming playback after filling buffers.
* @see android.media.MediaPlayer.OnInfoListener
*/
public static final int MEDIA_INFO_BUFFERING_END = 702;
/** Bad interleaving means that a media has been improperly interleaved or
* not interleaved at all, e.g has all the video samples first then all the
* audio ones. Video is playing but a lot of disk seeks may be happening.
* @see android.media.MediaPlayer.OnInfoListener
*/
public static final int MEDIA_INFO_BAD_INTERLEAVING = 800;
/** The media cannot be seeked (e.g live stream)
* @see android.media.MediaPlayer.OnInfoListener
*/
public static final int MEDIA_INFO_NOT_SEEKABLE = 801;
/** A new set of metadata is available.
* @see android.media.MediaPlayer.OnInfoListener
*/
public static final int MEDIA_INFO_METADATA_UPDATE = 802;
/** A new set of external-only metadata is available. Used by
* JAVA framework to avoid triggering track scanning.
* @hide
*/
public static final int MEDIA_INFO_EXTERNAL_METADATA_UPDATE = 803;
/** Failed to handle timed text track properly.
* @see android.media.MediaPlayer.OnInfoListener
*
* {@hide}
*/
public static final int MEDIA_INFO_TIMED_TEXT_ERROR = 900;
/** Subtitle track was not supported by the media framework.
* @see android.media.MediaPlayer.OnInfoListener
*/
public static final int MEDIA_INFO_UNSUPPORTED_SUBTITLE = 901;
/** Reading the subtitle track takes too long.
* @see android.media.MediaPlayer.OnInfoListener
*/
public static final int MEDIA_INFO_SUBTITLE_TIMED_OUT = 902;
/**
* Interface definition of a callback to be invoked to communicate some
* info and/or warning about the media or its playback.
*/
public interface OnInfoListener
{
/**
* Called to indicate an info or a warning.
*
* @param mp the MediaPlayer the info pertains to.
* @param what the type of info or warning.
*
*
* @param extra an extra code, specific to the info. Typically
* implementation dependent.
* @return True if the method handled the info, false if it didn't.
* Returning false, or not having an OnErrorListener at all, will
* cause the info to be discarded.
*/
boolean onInfo(MediaPlayer mp, int what, int extra);
}
/**
* Register a callback to be invoked when an info/warning is available.
*
* @param listener the callback that will be run
*/
public void setOnInfoListener(OnInfoListener listener)
{
mOnInfoListener = listener;
}
private OnInfoListener mOnInfoListener;
/*
* Test whether a given video scaling mode is supported.
*/
private boolean isVideoScalingModeSupported(int mode) {
return (mode == VIDEO_SCALING_MODE_SCALE_TO_FIT ||
mode == VIDEO_SCALING_MODE_SCALE_TO_FIT_WITH_CROPPING);
}
/** @hide */
static class TimeProvider implements MediaPlayer.OnSeekCompleteListener,
MediaTimeProvider {
private static final String TAG = "MTP";
private static final long MAX_NS_WITHOUT_POSITION_CHECK = 5000000000L;
private static final long MAX_EARLY_CALLBACK_US = 1000;
private static final long TIME_ADJUSTMENT_RATE = 2; /* meaning 1/2 */
private long mLastTimeUs = 0;
private MediaPlayer mPlayer;
private boolean mPaused = true;
private boolean mStopped = true;
private long mLastReportedTime;
private long mTimeAdjustment;
// since we are expecting only a handful listeners per stream, there is
// no need for log(N) search performance
private MediaTimeProvider.OnMediaTimeListener mListeners[];
private long mTimes[];
private long mLastNanoTime;
private Handler mEventHandler;
private boolean mRefresh = false;
private boolean mPausing = false;
private boolean mSeeking = false;
private static final int NOTIFY = 1;
private static final int NOTIFY_TIME = 0;
private static final int REFRESH_AND_NOTIFY_TIME = 1;
private static final int NOTIFY_STOP = 2;
private static final int NOTIFY_SEEK = 3;
private HandlerThread mHandlerThread;
/** @hide */
public boolean DEBUG = false;
public TimeProvider(MediaPlayer mp) {
mPlayer = mp;
try {
getCurrentTimeUs(true, false);
} catch (IllegalStateException e) {
// we assume starting position
mRefresh = true;
}
Looper looper;
if ((looper = Looper.myLooper()) == null &&
(looper = Looper.getMainLooper()) == null) {
// Create our own looper here in case MP was created without one
mHandlerThread = new HandlerThread("MediaPlayerMTPEventThread",
Process.THREAD_PRIORITY_FOREGROUND);
mHandlerThread.start();
looper = mHandlerThread.getLooper();
}
mEventHandler = new EventHandler(looper);
mListeners = new MediaTimeProvider.OnMediaTimeListener[0];
mTimes = new long[0];
mLastTimeUs = 0;
mTimeAdjustment = 0;
}
private void scheduleNotification(int type, long delayUs) {
// ignore time notifications until seek is handled
if (mSeeking &&
(type == NOTIFY_TIME || type == REFRESH_AND_NOTIFY_TIME)) {
return;
}
if (DEBUG) Log.v(TAG, "scheduleNotification " + type + " in " + delayUs);
mEventHandler.removeMessages(NOTIFY);
Message msg = mEventHandler.obtainMessage(NOTIFY, type, 0);
mEventHandler.sendMessageDelayed(msg, (int) (delayUs / 1000));
}
/** @hide */
public void close() {
mEventHandler.removeMessages(NOTIFY);
if (mHandlerThread != null) {
mHandlerThread.quitSafely();
mHandlerThread = null;
}
}
/** @hide */
protected void finalize() {
if (mHandlerThread != null) {
mHandlerThread.quitSafely();
}
}
/** @hide */
public void onPaused(boolean paused) {
synchronized(this) {
if (DEBUG) Log.d(TAG, "onPaused: " + paused);
if (mStopped) { // handle as seek if we were stopped
mStopped = false;
mSeeking = true;
scheduleNotification(NOTIFY_SEEK, 0 /* delay */);
} else {
mPausing = paused; // special handling if player disappeared
mSeeking = false;
scheduleNotification(REFRESH_AND_NOTIFY_TIME, 0 /* delay */);
}
}
}
/** @hide */
public void onStopped() {
synchronized(this) {
if (DEBUG) Log.d(TAG, "onStopped");
mPaused = true;
mStopped = true;
mSeeking = false;
scheduleNotification(NOTIFY_STOP, 0 /* delay */);
}
}
/** @hide */
@Override
public void onSeekComplete(MediaPlayer mp) {
synchronized(this) {
mStopped = false;
mSeeking = true;
scheduleNotification(NOTIFY_SEEK, 0 /* delay */);
}
}
/** @hide */
public void onNewPlayer() {
if (mRefresh) {
synchronized(this) {
mStopped = false;
mSeeking = true;
scheduleNotification(NOTIFY_SEEK, 0 /* delay */);
}
}
}
private synchronized void notifySeek() {
mSeeking = false;
try {
long timeUs = getCurrentTimeUs(true, false);
if (DEBUG) Log.d(TAG, "onSeekComplete at " + timeUs);
for (MediaTimeProvider.OnMediaTimeListener listener: mListeners) {
if (listener == null) {
break;
}
listener.onSeek(timeUs);
}
} catch (IllegalStateException e) {
// we should not be there, but at least signal pause
if (DEBUG) Log.d(TAG, "onSeekComplete but no player");
mPausing = true; // special handling if player disappeared
notifyTimedEvent(false /* refreshTime */);
}
}
private synchronized void notifyStop() {
for (MediaTimeProvider.OnMediaTimeListener listener: mListeners) {
if (listener == null) {
break;
}
listener.onStop();
}
}
private int registerListener(MediaTimeProvider.OnMediaTimeListener listener) {
int i = 0;
for (; i < mListeners.length; i++) {
if (mListeners[i] == listener || mListeners[i] == null) {
break;
}
}
// new listener
if (i >= mListeners.length) {
MediaTimeProvider.OnMediaTimeListener[] newListeners =
new MediaTimeProvider.OnMediaTimeListener[i + 1];
long[] newTimes = new long[i + 1];
System.arraycopy(mListeners, 0, newListeners, 0, mListeners.length);
System.arraycopy(mTimes, 0, newTimes, 0, mTimes.length);
mListeners = newListeners;
mTimes = newTimes;
}
if (mListeners[i] == null) {
mListeners[i] = listener;
mTimes[i] = MediaTimeProvider.NO_TIME;
}
return i;
}
public void notifyAt(
long timeUs, MediaTimeProvider.OnMediaTimeListener listener) {
synchronized(this) {
if (DEBUG) Log.d(TAG, "notifyAt " + timeUs);
mTimes[registerListener(listener)] = timeUs;
scheduleNotification(NOTIFY_TIME, 0 /* delay */);
}
}
public void scheduleUpdate(MediaTimeProvider.OnMediaTimeListener listener) {
synchronized(this) {
if (DEBUG) Log.d(TAG, "scheduleUpdate");
int i = registerListener(listener);
if (!mStopped) {
mTimes[i] = 0;
scheduleNotification(NOTIFY_TIME, 0 /* delay */);
}
}
}
public void cancelNotifications(
MediaTimeProvider.OnMediaTimeListener listener) {
synchronized(this) {
int i = 0;
for (; i < mListeners.length; i++) {
if (mListeners[i] == listener) {
System.arraycopy(mListeners, i + 1,
mListeners, i, mListeners.length - i - 1);
System.arraycopy(mTimes, i + 1,
mTimes, i, mTimes.length - i - 1);
mListeners[mListeners.length - 1] = null;
mTimes[mTimes.length - 1] = NO_TIME;
break;
} else if (mListeners[i] == null) {
break;
}
}
scheduleNotification(NOTIFY_TIME, 0 /* delay */);
}
}
private synchronized void notifyTimedEvent(boolean refreshTime) {
// figure out next callback
long nowUs;
try {
nowUs = getCurrentTimeUs(refreshTime, true);
} catch (IllegalStateException e) {
// assume we paused until new player arrives
mRefresh = true;
mPausing = true; // this ensures that call succeeds
nowUs = getCurrentTimeUs(refreshTime, true);
}
long nextTimeUs = nowUs;
if (mSeeking) {
// skip timed-event notifications until seek is complete
return;
}
if (DEBUG) {
StringBuilder sb = new StringBuilder();
sb.append("notifyTimedEvent(").append(mLastTimeUs).append(" -> ")
.append(nowUs).append(") from {");
boolean first = true;
for (long time: mTimes) {
if (time == NO_TIME) {
continue;
}
if (!first) sb.append(", ");
sb.append(time);
first = false;
}
sb.append("}");
Log.d(TAG, sb.toString());
}
Vector