public final class

TrackInfoImpl

extends MediaPlayer2.TrackInfo

 java.lang.Object

↳MediaPlayer2.TrackInfo

↳androidx.media2.player.common.TrackInfoImpl

Overview

Class for MediaPlayer2 implementations to return each audio/video/subtitle track's metadata.

Summary

Constructors
publicTrackInfoImpl(int type, MediaFormat format)

Methods
public MediaFormatgetFormat()

Gets the of the track.

public java.lang.StringgetLanguage()

Gets the language code of the track.

public intgetTrackType()

Gets the track type.

public java.lang.StringtoString()

from java.lang.Objectclone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructors

public TrackInfoImpl(int type, MediaFormat format)

Methods

public int getTrackType()

Gets the track type.

Returns:

TrackType which indicates if the track is video, audio, timed text.

public java.lang.String getLanguage()

Gets the language code of the track.

Returns:

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 MediaFormat getFormat()

Gets the of the track. If the format is unknown or could not be determined, null is returned.

public java.lang.String toString()

Source

/*
 * Copyright 2018 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 androidx.media2.player.common;

import static androidx.annotation.RestrictTo.Scope.LIBRARY_GROUP_PREFIX;

import android.media.MediaFormat;

import androidx.annotation.RestrictTo;
import androidx.media2.player.MediaPlayer2;

/**
 * Class for MediaPlayer2 implementations to return each audio/video/subtitle track's metadata.
 *
 * @see MediaPlayer2#getTrackInfo
 * @hide
 */
@RestrictTo(LIBRARY_GROUP_PREFIX)
public final class TrackInfoImpl extends MediaPlayer2.TrackInfo {
    private final int mTrackType;
    private final MediaFormat mFormat;

    /**
     * Gets the track type.
     * @return TrackType which indicates if the track is video, audio, timed text.
     */
    @Override
    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.
     */
    @Override
    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.
     */
    @Override
    public MediaFormat getFormat() {
        if (mTrackType == MEDIA_TRACK_TYPE_SUBTITLE) {
            return mFormat;
        }
        return null;
    }

    public TrackInfoImpl(int type, MediaFormat format) {
        mTrackType = type;
        mFormat = format;
    }

    @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_SUBTITLE:
                out.append("SUBTITLE");
                break;
            case MEDIA_TRACK_TYPE_METADATA:
                out.append("METADATA");
                break;
            default:
                out.append("UNKNOWN");
                break;
        }
        out.append(", ");
        out.append(mFormat);
        out.append("}");
        return out.toString();
    }
}