1c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen/* 2c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen * Copyright (C) 2012 The Android Open Source Project 3c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen * 4c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen * Licensed under the Apache License, Version 2.0 (the "License"); 5c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen * you may not use this file except in compliance with the License. 6c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen * You may obtain a copy of the License at 7c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen * 8c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen * http://www.apache.org/licenses/LICENSE-2.0 9c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen * 10c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen * Unless required by applicable law or agreed to in writing, software 11c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen * distributed under the License is distributed on an "AS IS" BASIS, 12c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen * See the License for the specific language governing permissions and 14c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen * limitations under the License. 15c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen */ 16c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen 17c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen 18c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissenpackage android.media; 19c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen 20c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissenimport java.io.Closeable; 21c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen 22c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen/** 23c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen * An abstraction for a media data source, e.g. a file or an http stream 24c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen * {@hide} 25c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen */ 26c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissenpublic interface DataSource extends Closeable { 27c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen /** 28c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen * Reads data from the data source at the requested position 29c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen * 30c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen * @param offset where in the source to read 31c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen * @param buffer the buffer to read the data into 32c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen * @param size how many bytes to read 33c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen * @return the number of bytes read, or -1 if there was an error 34c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen */ 35c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen public int readAt(long offset, byte[] buffer, int size); 36c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen 37c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen /** 38c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen * Gets the size of the data source. 39c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen * 40c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen * @return size of data source, or -1 if the length is unknown 41c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen */ 42c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen public long getSize(); 43c209a06cfdcf633f12a299245312e3ac32bff27cMarco Nelissen} 44