/*
* Copyright 2023 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
*
* https://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.media3.extractor.text;
import android.util.SparseArray;
import androidx.media3.common.C;
import androidx.media3.extractor.ExtractorOutput;
import androidx.media3.extractor.SeekMap;
import androidx.media3.extractor.TrackOutput;
/** A wrapping {@link ExtractorOutput} for use by {@link SubtitleTranscodingExtractor}. */
/* package */ class SubtitleTranscodingExtractorOutput implements ExtractorOutput {
private final ExtractorOutput delegate;
private final SubtitleParser.Factory subtitleParserFactory;
private final SparseArray<SubtitleTranscodingTrackOutput> textTrackOutputs;
public SubtitleTranscodingExtractorOutput(
ExtractorOutput delegate, SubtitleParser.Factory subtitleParserFactory) {
this.delegate = delegate;
this.subtitleParserFactory = subtitleParserFactory;
textTrackOutputs = new SparseArray<>();
}
public void resetSubtitleParsers() {
for (int i = 0; i < textTrackOutputs.size(); i++) {
textTrackOutputs.valueAt(i).resetSubtitleParser();
}
}
// ExtractorOutput implementation
@Override
public TrackOutput track(int id, @C.TrackType int type) {
if (type != C.TRACK_TYPE_TEXT) {
return delegate.track(id, type);
}
SubtitleTranscodingTrackOutput existingTrackOutput = textTrackOutputs.get(id);
if (existingTrackOutput != null) {
return existingTrackOutput;
}
SubtitleTranscodingTrackOutput trackOutput =
new SubtitleTranscodingTrackOutput(delegate.track(id, type), subtitleParserFactory);
textTrackOutputs.put(id, trackOutput);
return trackOutput;
}
@Override
public void endTracks() {
delegate.endTracks();
}
@Override
public void seekMap(SeekMap seekMap) {
delegate.seekMap(seekMap);
}
}