Android Open Source - android4tv-example4 Teletext Subtitle Audio Manager

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The source code is released under:
Apache License
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Java Source Code

/*
 * Copyright (C) 2014 iWedia S.A. 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.
 *///from w  ww  . java 2 s  .  co  m
package com.iwedia.exampleip.dtv;

import android.view.SurfaceView;
import android.widget.RelativeLayout;
import android.widget.RelativeLayout.LayoutParams;

import com.iwedia.dtv.audio.AudioTrack;
import com.iwedia.dtv.audio.IAudioControl;
import com.iwedia.dtv.display.IDisplayControl;
import com.iwedia.dtv.display.SurfaceBundle;
import com.iwedia.dtv.subtitle.ISubtitleControl;
import com.iwedia.dtv.subtitle.SubtitleMode;
import com.iwedia.dtv.subtitle.SubtitleTrack;
import com.iwedia.dtv.subtitle.SubtitleType;
import com.iwedia.dtv.teletext.ITeletextControl;
import com.iwedia.dtv.teletext.TeletextTrack;
import com.iwedia.dtv.types.InternalException;
import com.iwedia.dtv.types.UserControl;

import java.util.Locale;

public class TeletextSubtitleAudioManager {
    public static final int TELETEXT_BACKGROUND_TRANSPARENT = 255,
            TELETEXT_BACKGROUND_OPAQUE = 0;
    private ITeletextControl mTeletextControl;
    private ISubtitleControl mSubtitleControl;
    private IAudioControl mAudioControl;
    private IDisplayControl mDisplayControl;
    private boolean subtitleActive = false, teletextActive = false;
    private static TeletextSubtitleAudioManager instance;
    private SurfaceView mSurfaceView = null;
    private int mScreenWidth = 0, mScreenHeight = 0;

    /**
     * Teletext state stuff
     */
    public enum TeletextMode {
        FULL, HALF, TRANSPARENT, OFF
    }

    private TeletextMode mTeletextMode = TeletextMode.OFF;

    protected static TeletextSubtitleAudioManager getInstance(
            ITeletextControl mTeletextControl,
            ISubtitleControl mSubtitleControl, IAudioControl mAudioControl,
            IDisplayControl mDisplayControl) {
        if (instance == null) {
            instance = new TeletextSubtitleAudioManager(mTeletextControl,
                    mSubtitleControl, mAudioControl, mDisplayControl);
        }
        return instance;
    }

    private TeletextSubtitleAudioManager(ITeletextControl mTeletextControl,
            ISubtitleControl mSubtitleControl, IAudioControl mAudioControl,
            IDisplayControl mDisplayControl) {
        this.mTeletextControl = mTeletextControl;
        this.mSubtitleControl = mSubtitleControl;
        this.mAudioControl = mAudioControl;
        this.mDisplayControl = mDisplayControl;
    }

    /**
     * Initialize teletext and subtitle drawing surface.
     * 
     * @param surfaceView
     *        to send to teletext and subtitle engine.
     * @param screenWidth
     *        Width of screen.
     * @param screenHeight
     *        Height of screen.
     * @throws IllegalArgumentException
     * @throws InternalException
     */
    public void initializeSubtitleAndTeletextDisplay(SurfaceView surfaceView,
            int screenWidth, int screenHeight) throws IllegalArgumentException,
            InternalException {
        mSurfaceView = surfaceView;
        mScreenWidth = screenWidth;
        mScreenHeight = screenHeight;
        SurfaceBundle surfaceBundle = new SurfaceBundle();
        surfaceBundle.setSurface(surfaceView.getHolder().getSurface());
        mDisplayControl.setVideoLayerSurface(1, surfaceBundle);
    }

    /**
     * Shows teletext dialog and send command to middleware to start drawing
     * 
     * @throws InternalException
     */
    public boolean changeTeletext(int trackIndex) throws InternalException {
        if (mTeletextMode == TeletextMode.FULL) {
            RelativeLayout.LayoutParams params = (LayoutParams) mSurfaceView
                    .getLayoutParams();
            params.width = mScreenWidth / 2;
            params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
            mSurfaceView.setLayoutParams(params);
            mDisplayControl.scaleWindow(0, 0, mScreenWidth / 2, mScreenHeight);
            mTeletextMode = TeletextMode.HALF;
        } else if (mTeletextMode == TeletextMode.HALF) {
            RelativeLayout.LayoutParams params = (LayoutParams) mSurfaceView
                    .getLayoutParams();
            params.width = LayoutParams.MATCH_PARENT;
            params.addRule(RelativeLayout.CENTER_IN_PARENT);
            mSurfaceView.setLayoutParams(params);
            mTeletextMode = TeletextMode.TRANSPARENT;
            mDisplayControl.scaleWindow(0, 0, mScreenWidth, mScreenHeight);
            mTeletextControl
                    .setTeletextBgAlpha(TELETEXT_BACKGROUND_TRANSPARENT);
        } else if (mTeletextMode == TeletextMode.OFF) {
            RelativeLayout.LayoutParams params = (LayoutParams) mSurfaceView
                    .getLayoutParams();
            params.width = LayoutParams.MATCH_PARENT;
            params.addRule(RelativeLayout.CENTER_IN_PARENT);
            mSurfaceView.setLayoutParams(params);
            mTeletextMode = TeletextMode.FULL;
            mTeletextControl.setTeletextBgAlpha(TELETEXT_BACKGROUND_OPAQUE);
            mTeletextControl.setCurrentTeletextTrack(DVBManager.getInstance()
                    .getCurrentLiveRoute(), trackIndex);
            if (mTeletextControl.getCurrentTeletextTrackIndex(DVBManager
                    .getInstance().getCurrentLiveRoute()) >= 0) {
                teletextActive = true;
            }
        } else if (mTeletextMode == TeletextMode.TRANSPARENT) {
            mTeletextControl.deselectCurrentTeletextTrack(DVBManager
                    .getInstance().getCurrentLiveRoute());
            if (mTeletextControl.getCurrentTeletextTrackIndex(DVBManager
                    .getInstance().getCurrentLiveRoute()) < 0) {
                teletextActive = false;
                mTeletextMode = TeletextMode.OFF;
            }
        }
        return teletextActive;
    }

    /**
     * Hide teletext
     * 
     * @throws InternalException
     */
    public void hideTeletext() throws InternalException {
        mTeletextControl.deselectCurrentTeletextTrack(DVBManager.getInstance()
                .getCurrentLiveRoute());
        if (mTeletextControl.getCurrentTeletextTrackIndex(DVBManager
                .getInstance().getCurrentLiveRoute()) < 0) {
            mDisplayControl.scaleWindow(0, 0, mScreenWidth, mScreenHeight);
            teletextActive = false;
            mTeletextMode = TeletextMode.OFF;
        }
    }

    /**
     * Returns teletext track by index.
     */
    public TeletextTrack getTeletextTrack(int index) {
        return mTeletextControl.getTeletextTrack(DVBManager.getInstance()
                .getCurrentLiveRoute(), index);
    }

    /**
     * Send pressed keycode to teletext engine.
     */
    public void sendTeletextInputCommand(int keyCode) {
        mTeletextControl.sendInputControl(DVBManager.getInstance()
                .getCurrentLiveRoute(), UserControl.PRESSED, keyCode);
    }

    /**
     * Get teletext track count.
     * 
     * @return Number of teletext tracks.
     */
    public int getTeletextTrackCount() {
        return mTeletextControl.getTeletextTrackCount(DVBManager.getInstance()
                .getCurrentLiveRoute());
    }

    /**
     * Convert teletext track type to human readable format.
     * 
     * @param type
     *        Teletext track type.
     * @return Converted string.
     */
    public String convertTeletextTrackTypeToHumanReadableFormat(int type) {
        switch (type) {
            case 1: {
                return "TTXT NORMAL";
            }
            case 2: {
                return "TTXT SUB";
            }
            case 3: {
                return "TTXT INFO";
            }
            case 4: {
                return "TTXT PROGRAM SCHEDULE";
            }
            case 5: {
                return "TTXT SUB HOH";
            }
            default:
                return "UNKNOWN";
        }
    }

    /**
     * Convert subtitle track mode to human readable format.
     * 
     * @param type
     *        Subtitle track mode.
     * @return Converted string.
     */
    public String convertSubtitleTrackModeToHumanReadableFormat(int modeIndex) {
        SubtitleMode mode = SubtitleMode.getFromValue(modeIndex);
        if (mode == SubtitleMode.TRANSLATION) {
            return "NORMAL";
        } else if (mode == SubtitleMode.HEARING_IMPAIRED) {
            return "HOH";
        }
        return "";
    }

    /**
     * Show subtitles on screen.
     * 
     * @param trackIndex
     *        Subtitle track to show.
     * @return True if subtitle is started, false otherwise.
     * @throws InternalException
     */
    public boolean showSubtitles(int trackIndex) throws InternalException {
        mSubtitleControl.setCurrentSubtitleTrack(DVBManager.getInstance()
                .getCurrentLiveRoute(), trackIndex);
        if (mSubtitleControl.getCurrentSubtitleTrackIndex(DVBManager
                .getInstance().getCurrentLiveRoute()) >= 0) {
            subtitleActive = true;
        }
        return subtitleActive;
    }

    /**
     * Hide started subtitle.
     * 
     * @throws InternalException
     */
    public void hideSubtitles() throws InternalException {
        mSubtitleControl.deselectCurrentSubtitleTrack(DVBManager.getInstance()
                .getCurrentLiveRoute());
        if (mSubtitleControl.getCurrentSubtitleTrackIndex(DVBManager
                .getInstance().getCurrentLiveRoute()) < 0) {
            subtitleActive = false;
        }
    }

    /**
     * Returns subtitle track by index.
     */
    public SubtitleTrack getSubtitleTrack(int index) {
        return mSubtitleControl.getSubtitleTrack(DVBManager.getInstance()
                .getCurrentLiveRoute(), index);
    }

    /**
     * Get subtitle track count.
     * 
     * @return Number of subtitle tracks.
     */
    public int getSubtitlesTrackCount() {
        return mSubtitleControl.getSubtitleTrackCount(DVBManager.getInstance()
                .getCurrentLiveRoute());
    }

    /**
     * Returns TRUE if automatic subtitle displaying is enabled, FALSE
     * otherwise.
     */
    public boolean isSubtitleAutomatic() {
        return mSubtitleControl.isAutomaticSubtitleDisplayEnabled();
    }

    /**
     * Set automatic subtitle displaying.
     */
    public void setSubtitleAutomatic(boolean automatic) {
        mSubtitleControl.enableAutomaticSubtitleDisplay(automatic);
    }

    /**
     * Returns active subtitle type.
     */
    public SubtitleType getSubtitleType() {
        return mSubtitleControl.getSubtitleType();
    }

    /**
     * Sets active subtitle type.
     */
    public void setSubtitleType(SubtitleType type) {
        mSubtitleControl.setSubtitleType(type);
    }

    /**
     * Returns active subtitle mode.
     */
    public SubtitleMode getSubtitleMode() {
        return mSubtitleControl.getSubtitleMode();
    }

    /**
     * Sets active subtitle mode.
     */
    public void setSubtitleMode(SubtitleMode mode) {
        mSubtitleControl.setSubtitleMode(mode);
    }

    /**
     * Returns number of audio tracks for current channel.
     */
    public int getAudioLanguagesTrackCount() {
        return mAudioControl.getAudioTrackCount(DVBManager.getInstance()
                .getCurrentLiveRoute());
    }

    /**
     * Returns audio track by index.
     */
    public AudioTrack getAudioLanguage(int index) {
        return mAudioControl.getAudioTrack(DVBManager.getInstance()
                .getCurrentLiveRoute(), index);
    }

    /**
     * Sets audio track with desired index as active.
     */
    public void setAudioTrack(int index) throws InternalException {
        mAudioControl.setCurrentAudioTrack(DVBManager.getInstance()
                .getCurrentLiveRoute(), index);
    }

    /**
     * Returns TRUE if subtitle is active, FALSE otherwise.
     */
    public boolean isSubtitleActive() {
        if (mSubtitleControl.getCurrentSubtitleTrackIndex(DVBManager
                .getInstance().getCurrentLiveRoute()) < 0) {
            subtitleActive = false;
        } else {
            subtitleActive = true;
        }
        return subtitleActive;
    }

    /**
     * Returns TRUE if teletext is active, FALSE otherwise.
     */
    public boolean isTeletextActive() {
        if (mTeletextControl.getCurrentTeletextTrackIndex(DVBManager
                .getInstance().getCurrentLiveRoute()) < 0) {
            teletextActive = false;
            mTeletextMode = TeletextMode.OFF;
        } else {
            teletextActive = true;
        }
        return teletextActive;
    }

    /**
     * @return Avalable audio languages for current service. If they are not
     *         available, it returns null.
     */
    public static String convertTrigramsToLanguage(String language) {
        String languageToDisplay;
        languageToDisplay = checkTrigrams(language);
        if (languageToDisplay.contains(" ")) {
            int indexOfSecondWord = languageToDisplay.indexOf(" ") + 1;
            languageToDisplay = languageToDisplay.substring(0, 1).toUpperCase(
                    new Locale(languageToDisplay))
                    + languageToDisplay.substring(1, indexOfSecondWord)
                    + languageToDisplay.substring(indexOfSecondWord,
                            indexOfSecondWord + 1).toUpperCase()
                    + languageToDisplay.substring(indexOfSecondWord + 1);
        } else {
            languageToDisplay = languageToDisplay.substring(0, 1).toUpperCase()
                    + languageToDisplay.substring(1);
        }
        return languageToDisplay;
    }

    /**
     * We must fix comedia and Android OS trigrams mismatch
     */
    private static String checkTrigrams(String language) {
        if (language.equals("fre")) {
            language = "fra";
        } else if (language.equals("sve")) {
            language = "swe";
        } else if (language.equals("dut") || language.equals("nla")) {
            language = "nl";
        } else if (language.equals("ger")) {
            language = "deu";
        } else if (language.equals("alb")) {
            language = "sqi";
        } else if (language.equals("arm")) {
            language = "hye";
        } else if (language.equals("baq")) {
            language = "eus";
        } else if (language.equals("chi")) {
            language = "zho";
        } else if (language.equals("cze")) {
            language = "ces";
        } else if (language.equals("per")) {
            language = "fas";
        } else if (language.equals("gae")) {
            language = "gla";
        } else if (language.equals("geo")) {
            language = "kat";
        } else if (language.equals("gre")) {
            language = "ell";
        } else if (language.equals("ice")) {
            language = "isl";
        } else if (language.equals("ice")) {
            language = "isl";
        } else if (language.equals("mac") || language.equals("mak")) {
            language = "mk";
        } else if (language.equals("may")) {
            language = "msa";
        } else if (language.equals("rum")) {
            language = "ron";
        } else if (language.equals("scr")) {
            language = "sr";
        } else if (language.equals("slo")) {
            language = "slk";
        } else if (language.equals("esl") || language.equals("esp")) {
            language = "spa";
        } else if (language.equals("wel")) {
            language = "cym";
        }
        Locale locale = new Locale(language);
        Locale.setDefault(locale);
        String languageToDisplay = Locale.getDefault().getDisplayLanguage();
        if (languageToDisplay.equals("qaa")) {
            languageToDisplay = "Original";
        }
        if (languageToDisplay.equals("mul")) {
            languageToDisplay = "Multiple";
        }
        if (languageToDisplay.equals("und")) {
            languageToDisplay = "Undefined";
        }
        return languageToDisplay;
    }

    public TeletextMode getmTeletextMode() {
        return mTeletextMode;
    }
}
Java Source Code List
