598 lines
22 KiB
Java
598 lines
22 KiB
Java
package org.schabi.newpipe.extractor.stream;
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/*
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* Created by Christian Schabesberger on 10.08.18.
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*
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* Copyright (C) Christian Schabesberger 2016 <chris.schabesberger@mailbox.org>
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* StreamExtractor.java is part of NewPipe.
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*
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* NewPipe is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* NewPipe is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with NewPipe. If not, see <http://www.gnu.org/licenses/>.
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*/
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import org.schabi.newpipe.extractor.InfoItem;
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import org.schabi.newpipe.extractor.InfoItemsCollector;
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import org.schabi.newpipe.extractor.InfoItemExtractor;
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import org.schabi.newpipe.extractor.Extractor;
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import org.schabi.newpipe.extractor.MediaFormat;
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import org.schabi.newpipe.extractor.MetaInfo;
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import org.schabi.newpipe.extractor.StreamingService;
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import org.schabi.newpipe.extractor.channel.ChannelExtractor;
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import org.schabi.newpipe.extractor.exceptions.ExtractionException;
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import org.schabi.newpipe.extractor.exceptions.ParsingException;
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import org.schabi.newpipe.extractor.linkhandler.LinkHandler;
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import org.schabi.newpipe.extractor.localization.DateWrapper;
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import org.schabi.newpipe.extractor.utils.Parser;
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import javax.annotation.Nonnull;
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import javax.annotation.Nullable;
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import java.io.IOException;
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import java.util.Collections;
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import java.util.List;
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import java.util.Locale;
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/**
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* Scrapes information from a video/audio streaming service (eg, YouTube).
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*/
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public abstract class StreamExtractor extends Extractor {
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public static final int NO_AGE_LIMIT = 0;
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public StreamExtractor(StreamingService service, LinkHandler linkHandler) {
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super(service, linkHandler);
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}
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/**
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* The original textual date provided by the service. Should be used as a fallback if
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* {@link #getUploadDate()} isn't provided by the service, or it fails for some reason.
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*
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* <p>If the stream is a live stream, {@code null} should be returned.</p>
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*
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* @return The original textual date provided by the service, or {@code null}.
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* @throws ParsingException if there is an error in the extraction
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* @see #getUploadDate()
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*/
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@Nullable
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public String getTextualUploadDate() throws ParsingException {
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return null;
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}
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/**
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* A more general {@code Calendar} instance set to the date provided by the service.<br>
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* Implementations usually will just parse the date returned from the {@link #getTextualUploadDate()}.
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*
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* <p>If the stream is a live stream, {@code null} should be returned.</p>
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*
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* @return The date this item was uploaded, or {@code null}.
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* @throws ParsingException if there is an error in the extraction
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* or the extracted date couldn't be parsed.
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* @see #getTextualUploadDate()
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*/
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@Nullable
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public DateWrapper getUploadDate() throws ParsingException {
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return null;
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}
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/**
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* This will return the url to the thumbnail of the stream. Try to return the medium resolution here.
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*
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* @return The url of the thumbnail.
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* @throws ParsingException
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*/
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@Nonnull
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public abstract String getThumbnailUrl() throws ParsingException;
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/**
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* This is the stream description.
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*
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* @return The description of the stream/video or Description.emptyDescription if the description is empty.
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* @throws ParsingException
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*/
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@Nonnull
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public Description getDescription() throws ParsingException {
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return Description.emptyDescription;
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}
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/**
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* Get the age limit.
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*
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* @return The age which limits the content or {@value NO_AGE_LIMIT} if there is no limit
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* @throws ParsingException if an error occurs while parsing
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*/
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public int getAgeLimit() throws ParsingException {
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return NO_AGE_LIMIT;
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}
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/**
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* This should return the length of a video in seconds.
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*
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* @return The length of the stream in seconds or 0 when it has no length (e.g. a livestream).
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* @throws ParsingException
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*/
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public long getLength() throws ParsingException {
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return 0;
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}
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/**
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* If the url you are currently handling contains a time stamp/seek, you can return the
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* position it represents here.
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* If the url has no time stamp simply return zero.
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*
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* @return the timestamp in seconds or 0 when there is no timestamp
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* @throws ParsingException
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*/
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public long getTimeStamp() throws ParsingException {
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return 0;
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}
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/**
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* The count of how many people have watched the video/listened to the audio stream.
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* If the current stream has no view count or its not available simply return -1
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*
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* @return amount of views or -1 if not available.
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* @throws ParsingException
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*/
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public long getViewCount() throws ParsingException {
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return -1;
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}
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/**
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* The amount of likes a video/audio stream got.
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* If the current stream has no likes or its not available simply return -1
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*
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* @return the amount of likes the stream got or -1 if not available.
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* @throws ParsingException
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*/
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public long getLikeCount() throws ParsingException {
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return -1;
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}
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/**
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* The amount of dislikes a video/audio stream got.
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* If the current stream has no dislikes or its not available simply return -1
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*
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* @return the amount of likes the stream got or -1 if not available.
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* @throws ParsingException
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*/
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public long getDislikeCount() throws ParsingException {
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return -1;
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}
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/**
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* The Url to the page of the creator/uploader of the stream. This must not be a homepage,
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* but the page offered by the service the extractor handles. This url will be handled by the
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* {@link ChannelExtractor},
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* so be sure to implement that one before you return a value here, otherwise NewPipe will crash if one selects
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* this url.
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*
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* @return the url to the page of the creator/uploader of the stream or an empty string
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* @throws ParsingException
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*/
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@Nonnull
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public abstract String getUploaderUrl() throws ParsingException;
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/**
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* The name of the creator/uploader of the stream.
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* If the name is not available you can simply return an empty string.
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*
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* @return the name of the creator/uploader of the stream or an empty tring
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* @throws ParsingException
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*/
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@Nonnull
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public abstract String getUploaderName() throws ParsingException;
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/**
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* Whether the uploader has been verified by the service's provider.
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* If there is no verification implemented, return <code>false</code>.
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*
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* @return whether the uploader has been verified by the service's provider
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* @throws ParsingException
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*/
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public boolean isUploaderVerified() throws ParsingException {
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return false;
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}
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/**
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* The url to the image file/profile picture/avatar of the creator/uploader of the stream.
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* If the url is not available you can return an empty String.
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*
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* @return The url of the image file of the uploader or an empty String
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* @throws ParsingException
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*/
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@Nonnull
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public String getUploaderAvatarUrl() throws ParsingException {
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return "";
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}
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/**
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* The Url to the page of the sub-channel of the stream. This must not be a homepage,
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* but the page offered by the service the extractor handles. This url will be handled by the
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* {@link ChannelExtractor},
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* so be sure to implement that one before you return a value here, otherwise NewPipe will crash if one selects
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* this url.
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*
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* @return the url to the page of the sub-channel of the stream or an empty String
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* @throws ParsingException
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*/
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@Nonnull
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public String getSubChannelUrl() throws ParsingException {
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return "";
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}
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/**
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* The name of the sub-channel of the stream.
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* If the name is not available you can simply return an empty string.
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*
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* @return the name of the sub-channel of the stream or an empty String
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* @throws ParsingException
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*/
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@Nonnull
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public String getSubChannelName() throws ParsingException {
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return "";
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}
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/**
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* The url to the image file/profile picture/avatar of the sub-channel of the stream.
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* If the url is not available you can return an empty String.
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*
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* @return The url of the image file of the sub-channel or an empty String
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* @throws ParsingException
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*/
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@Nonnull
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public String getSubChannelAvatarUrl() throws ParsingException {
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return "";
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}
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/**
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* Get the dash mpd url. If you don't know what a dash MPD is you can read about it
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* <a href="https://www.brendanlong.com/the-structure-of-an-mpeg-dash-mpd.html">here</a>.
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*
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* @return the url as a string or an empty string or an empty string if not available
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* @throws ParsingException if an error occurs while reading
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*/
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@Nonnull
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public String getDashMpdUrl() throws ParsingException {
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return "";
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}
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/**
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* I am not sure if this is in use, and how this is used. However the frontend is missing support
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* for HLS streams. Prove me if I am wrong. Please open an
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* <a href="https://github.com/teamnewpipe/newpipe/issues">issue</a>,
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* or fix this description if you know whats up with this.
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*
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* @return The Url to the hls stream or an empty string if not available.
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* @throws ParsingException
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*/
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@Nonnull
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public String getHlsUrl() throws ParsingException {
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return "";
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}
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/**
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* This should return a list of available
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* <a href="https://teamnewpipe.github.io/NewPipeExtractor/javadoc/org/schabi/newpipe/extractor/stream/AudioStream.html">AudioStream</a>s
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* You can also return null or an empty list, however be aware that if you don't return anything
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* in getVideoStreams(), getVideoOnlyStreams() and getDashMpdUrl() either the Collector will handle this as
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* a failed extraction procedure.
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*
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* @return a list of audio only streams in the format of AudioStream
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* @throws IOException
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* @throws ExtractionException
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*/
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public abstract List<AudioStream> getAudioStreams() throws IOException, ExtractionException;
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/**
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* This should return a list of available
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* <a href="https://teamnewpipe.github.io/NewPipeExtractor/javadoc/org/schabi/newpipe/extractor/stream/VideoStream.html">VideoStream</a>s
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* Be aware this is the list of video streams which do contain an audio stream.
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* You can also return null or an empty list, however be aware that if you don't return anything
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* in getAudioStreams(), getVideoOnlyStreams() and getDashMpdUrl() either the Collector will handle this as
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* a failed extraction procedure.
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*
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* @return a list of combined video and streams in the format of AudioStream
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* @throws IOException
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* @throws ExtractionException
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*/
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public abstract List<VideoStream> getVideoStreams() throws IOException, ExtractionException;
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/**
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* This should return a list of available
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* <a href="https://teamnewpipe.github.io/NewPipeExtractor/javadoc/org/schabi/newpipe/extractor/stream/VideoStream.html">VideoStream</a>s.
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* Be aware this is the list of video streams which do NOT contain an audio stream.
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* You can also return null or an empty list, however be aware that if you don't return anything
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* in getAudioStreams(), getVideoStreams() and getDashMpdUrl() either the Collector will handle this as
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* a failed extraction procedure.
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*
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* @return a list of video and streams in the format of AudioStream
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* @throws IOException
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* @throws ExtractionException
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*/
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public abstract List<VideoStream> getVideoOnlyStreams() throws IOException, ExtractionException;
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/**
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* This will return a list of available
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* <a href="https://teamnewpipe.github.io/NewPipeExtractor/javadoc/org/schabi/newpipe/extractor/stream/Subtitles.html">Subtitles</a>s.
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* If no subtitles are available an empty list can be returned.
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*
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* @return a list of available subtitles or an empty list
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* @throws IOException
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* @throws ExtractionException
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*/
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@Nonnull
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public List<SubtitlesStream> getSubtitlesDefault() throws IOException, ExtractionException {
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return Collections.emptyList();
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}
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/**
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* This will return a list of available
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* <a href="https://teamnewpipe.github.io/NewPipeExtractor/javadoc/org/schabi/newpipe/extractor/stream/Subtitles.html">Subtitles</a>s.
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* given by a specific type.
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* If no subtitles in that specific format are available an empty list can be returned.
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*
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* @param format the media format by which the subtitles should be filtered
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* @return a list of available subtitles or an empty list
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* @throws IOException
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* @throws ExtractionException
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*/
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@Nonnull
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public List<SubtitlesStream> getSubtitles(MediaFormat format) throws IOException, ExtractionException {
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return Collections.emptyList();
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}
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/**
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* Get the <a href="https://teamnewpipe.github.io/NewPipeExtractor/javadoc/">StreamType</a>.
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*
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* @return the type of the stream
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* @throws ParsingException
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*/
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public abstract StreamType getStreamType() throws ParsingException;
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/**
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* Should return a list of streams related to the current handled. Many services show suggested
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* streams. If you don't like suggested streams you should implement them anyway since they can
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* be disabled by the user later in the frontend. The first related stream might be what was
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* previously known as a next stream.
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* If related streams aren't available simply return {@code null}.
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*
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* @return a list of InfoItems showing the related videos/streams
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* @throws IOException
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* @throws ExtractionException
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*/
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@Nullable
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public InfoItemsCollector<? extends InfoItem, ? extends InfoItemExtractor>
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getRelatedItems() throws IOException, ExtractionException {
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return null;
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}
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/**
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* @deprecated Use {@link #getRelatedItems()}. May be removed in a future version.
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* @return The result of {@link #getRelatedItems()} if it is a
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* StreamInfoItemsCollector, <code>null</code> otherwise
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* @throws IOException
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* @throws ExtractionException
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*/
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@Deprecated
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@Nullable
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public StreamInfoItemsCollector getRelatedStreams() throws IOException, ExtractionException {
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InfoItemsCollector<?, ?> collector = getRelatedItems();
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if (collector instanceof StreamInfoItemsCollector) {
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return (StreamInfoItemsCollector) collector;
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} else return null;
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}
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/**
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* Should return a list of Frameset object that contains preview of stream frames
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*
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* @return list of preview frames or empty list if frames preview is not supported or not found for specified stream
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* @throws ExtractionException
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*/
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@Nonnull
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public List<Frameset> getFrames() throws ExtractionException {
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return Collections.emptyList();
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}
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/**
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* Should analyse the webpage's document and extracts any error message there might be.
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*
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* @return Error message; <code>null</code> if there is no error message.
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*/
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public String getErrorMessage() {
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return null;
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}
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//////////////////////////////////////////////////////////////////
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/// Helper
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//////////////////////////////////////////////////////////////////
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/**
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* Override this function if the format of time stamp in the url is not the same format as that form youtube.
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* Honestly I don't even know the time stamp format of YouTube.
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*
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* @param regexPattern
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* @return the time stamp/seek for the video in seconds
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* @throws ParsingException
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*/
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protected long getTimestampSeconds(String regexPattern) throws ParsingException {
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String timeStamp;
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try {
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timeStamp = Parser.matchGroup1(regexPattern, getOriginalUrl());
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} catch (Parser.RegexException e) {
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// catch this instantly since a url does not necessarily have a timestamp
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// -2 because the testing system will consequently know that the regex failed
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// not good, I know
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return -2;
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}
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if (!timeStamp.isEmpty()) {
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try {
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String secondsString = "";
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String minutesString = "";
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String hoursString = "";
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try {
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secondsString = Parser.matchGroup1("(\\d{1,3})s", timeStamp);
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minutesString = Parser.matchGroup1("(\\d{1,3})m", timeStamp);
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hoursString = Parser.matchGroup1("(\\d{1,3})h", timeStamp);
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} catch (Exception e) {
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//it could be that time is given in another method
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if (secondsString.isEmpty() //if nothing was got,
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&& minutesString.isEmpty()//treat as unlabelled seconds
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&& hoursString.isEmpty()) {
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secondsString = Parser.matchGroup1("t=(\\d+)", timeStamp);
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}
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}
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int seconds = secondsString.isEmpty() ? 0 : Integer.parseInt(secondsString);
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int minutes = minutesString.isEmpty() ? 0 : Integer.parseInt(minutesString);
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int hours = hoursString.isEmpty() ? 0 : Integer.parseInt(hoursString);
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//don't trust BODMAS!
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return seconds + (60 * minutes) + (3600 * hours);
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//Log.d(TAG, "derived timestamp value:"+ret);
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//the ordering varies internationally
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} catch (ParsingException e) {
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throw new ParsingException("Could not get timestamp.", e);
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}
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} else {
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return 0;
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}
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}
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/**
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* The host of the stream (Eg. peertube.cpy.re).
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* If the host is not available, or if the service doesn't use
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* a federated system, but a centralised system,
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* you can simply return an empty string.
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*
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* @return the host of the stream or an empty string.
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* @throws ParsingException
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*/
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@Nonnull
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public String getHost() throws ParsingException {
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return "";
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}
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/**
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* The privacy of the stream (Eg. Public, Private, Unlisted…).
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*
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* @return the privacy of the stream.
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* @throws ParsingException
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*/
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public Privacy getPrivacy() throws ParsingException {
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return Privacy.PUBLIC;
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}
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/**
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* The name of the category of the stream.
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* If the category is not available you can simply return an empty string.
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*
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* @return the category of the stream or an empty string.
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* @throws ParsingException
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*/
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@Nonnull
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public String getCategory() throws ParsingException {
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return "";
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}
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/**
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* The name of the licence of the stream.
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* If the licence is not available you can simply return an empty string.
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*
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* @return the licence of the stream or an empty String.
|
|
* @throws ParsingException
|
|
*/
|
|
@Nonnull
|
|
public String getLicence() throws ParsingException {
|
|
return "";
|
|
}
|
|
|
|
/**
|
|
* The locale language of the stream.
|
|
* If the language is not available you can simply return null.
|
|
* If the language is provided by a language code, you can return
|
|
* new Locale(language_code);
|
|
*
|
|
* @return the locale language of the stream or <code>null</code>.
|
|
* @throws ParsingException
|
|
*/
|
|
@Nullable
|
|
public Locale getLanguageInfo() throws ParsingException {
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* The list of tags of the stream.
|
|
* If the tag list is not available you can simply return an empty list.
|
|
*
|
|
* @return the list of tags of the stream or Collections.emptyList().
|
|
* @throws ParsingException
|
|
*/
|
|
@Nonnull
|
|
public List<String> getTags() throws ParsingException {
|
|
return Collections.emptyList();
|
|
}
|
|
|
|
/**
|
|
* The support information of the stream.
|
|
* see: https://framatube.org/videos/watch/ee408ec8-07cd-4e35-b884-fb681a4b9d37
|
|
* (support button).
|
|
* If the support information are not available,
|
|
* you can simply return an empty String.
|
|
*
|
|
* @return the support information of the stream or an empty string.
|
|
* @throws ParsingException
|
|
*/
|
|
@Nonnull
|
|
public String getSupportInfo() throws ParsingException {
|
|
return "";
|
|
}
|
|
|
|
/**
|
|
* The list of stream segments by timestamps for the stream.
|
|
* If the segment list is not available you can simply return an empty list.
|
|
*
|
|
* @return The list of segments of the stream or an empty list.
|
|
* @throws ParsingException
|
|
*/
|
|
@Nonnull
|
|
public List<StreamSegment> getStreamSegments() throws ParsingException {
|
|
return Collections.emptyList();
|
|
}
|
|
|
|
/**
|
|
* Meta information about the stream.
|
|
* <p>
|
|
* This can be information about the stream creator (e.g. if the creator is a public broadcaster)
|
|
* or further information on the topic (e.g. hints that the video might contain conspiracy theories
|
|
* or contains information about a current health situation like the Covid-19 pandemic).
|
|
* </p>
|
|
* The meta information often contains links to external sources like Wikipedia or the WHO.
|
|
*
|
|
* @return The meta info of the stream or an empty list if not provided.
|
|
* @throws ParsingException
|
|
*/
|
|
@Nonnull
|
|
public List<MetaInfo> getMetaInfo() throws ParsingException {
|
|
return Collections.emptyList();
|
|
}
|
|
|
|
public enum Privacy {
|
|
PUBLIC,
|
|
UNLISTED,
|
|
PRIVATE,
|
|
INTERNAL,
|
|
OTHER
|
|
}
|
|
}
|