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/*
* Copyright (C) 2017 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 org.mozilla.thirdparty.com.google.android.exoplayer2.source.hls;
import android.net.Uri;
import androidx.annotation.Nullable;
import org.mozilla.thirdparty.com.google.android.exoplayer2.Format;
import org.mozilla.thirdparty.com.google.android.exoplayer2.extractor.Extractor;
import org.mozilla.thirdparty.com.google.android.exoplayer2.extractor.ExtractorInput;
import org.mozilla.thirdparty.com.google.android.exoplayer2.extractor.PositionHolder;
import org.mozilla.thirdparty.com.google.android.exoplayer2.util.TimestampAdjuster;
import java.io.IOException;
import java.util.List;
import java.util.Map;
/**
* Factory for HLS media chunk extractors.
*/
public interface HlsExtractorFactory {
/** Holds an {@link Extractor} and associated parameters. */
final class Result {
/** The created extractor; */
public final Extractor extractor;
/** Whether the segments for which {@link #extractor} is created are packed audio segments. */
public final boolean isPackedAudioExtractor;
/**
* Whether {@link #extractor} may be reused for following continuous (no immediately preceding
* discontinuities) segments of the same variant.
*/
public final boolean isReusable;
/**
* Creates a result.
*
* @param extractor See {@link #extractor}.
* @param isPackedAudioExtractor See {@link #isPackedAudioExtractor}.
* @param isReusable See {@link #isReusable}.
*/
public Result(Extractor extractor, boolean isPackedAudioExtractor, boolean isReusable) {
this.extractor = extractor;
this.isPackedAudioExtractor = isPackedAudioExtractor;
this.isReusable = isReusable;
}
}
HlsExtractorFactory DEFAULT = new DefaultHlsExtractorFactory();
/**
* Creates an {@link Extractor} for extracting HLS media chunks.
*
* @param previousExtractor A previously used {@link Extractor} which can be reused if the current
* chunk is a continuation of the previously extracted chunk, or null otherwise. It is the
* responsibility of implementers to only reuse extractors that are suited for reusage.
* @param uri The URI of the media chunk.
* @param format A {@link Format} associated with the chunk to extract.
* @param muxedCaptionFormats List of muxed caption {@link Format}s. Null if no closed caption
* information is available in the master playlist.
* @param timestampAdjuster Adjuster corresponding to the provided discontinuity sequence number.
* @param responseHeaders The HTTP response headers associated with the media segment or
* initialization section to extract.
* @param sniffingExtractorInput The first extractor input that will be passed to the returned
* extractor's {@link Extractor#read(ExtractorInput, PositionHolder)}. Must only be used to
* call {@link Extractor#sniff(ExtractorInput)}.
* @return A {@link Result}.
* @throws InterruptedException If the thread is interrupted while sniffing.
* @throws IOException If an I/O error is encountered while sniffing.
*/
Result createExtractor(
@Nullable Extractor previousExtractor,
Uri uri,
Format format,
@Nullable List<Format> muxedCaptionFormats,
TimestampAdjuster timestampAdjuster,
Map<String, List<String>> responseHeaders,
ExtractorInput sniffingExtractorInput)
throws InterruptedException, IOException;
}
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