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/*
* Copyright (C) 2016 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.extractor.flv;
import org.mozilla.thirdparty.com.google.android.exoplayer2.ParserException;
import org.mozilla.thirdparty.com.google.android.exoplayer2.extractor.TrackOutput;
import org.mozilla.thirdparty.com.google.android.exoplayer2.util.ParsableByteArray;
/**
* Extracts individual samples from FLV tags, preserving original order.
*/
/* package */ abstract class TagPayloadReader {
/**
* Thrown when the format is not supported.
*/
public static final class UnsupportedFormatException extends ParserException {
public UnsupportedFormatException(String msg) {
super(msg);
}
}
protected final TrackOutput output;
/**
* @param output A {@link TrackOutput} to which samples should be written.
*/
protected TagPayloadReader(TrackOutput output) {
this.output = output;
}
/**
* Notifies the reader that a seek has occurred.
* <p>
* Following a call to this method, the data passed to the next invocation of
* {@link #consume(ParsableByteArray, long)} will not be a continuation of the data that
* was previously passed. Hence the reader should reset any internal state.
*/
public abstract void seek();
/**
* Consumes payload data.
*
* @param data The payload data to consume.
* @param timeUs The timestamp associated with the payload.
* @return Whether a sample was output.
* @throws ParserException If an error occurs parsing the data.
*/
public final boolean consume(ParsableByteArray data, long timeUs) throws ParserException {
return parseHeader(data) && parsePayload(data, timeUs);
}
/**
* Parses tag header.
*
* @param data Buffer where the tag header is stored.
* @return Whether the header was parsed successfully.
* @throws ParserException If an error occurs parsing the header.
*/
protected abstract boolean parseHeader(ParsableByteArray data) throws ParserException;
/**
* Parses tag payload.
*
* @param data Buffer where tag payload is stored.
* @param timeUs Time position of the frame.
* @return Whether a sample was output.
* @throws ParserException If an error occurs parsing the payload.
*/
protected abstract boolean parsePayload(ParsableByteArray data, long timeUs)
throws ParserException;
}
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