1dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu/* 2dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu * Copyright 2008 CoreMedia AG, Hamburg 3dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu * 4dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu * Licensed under the Apache License, Version 2.0 (the License); 5dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu * you may not use this file except in compliance with the License. 6dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu * You may obtain a copy of the License at 7dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu * 8dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu * http://www.apache.org/licenses/LICENSE-2.0 9dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu * 10dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu * Unless required by applicable law or agreed to in writing, software 11dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu * distributed under the License is distributed on an AS IS BASIS, 12dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu * See the License for the specific language governing permissions and 14dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu * limitations under the License. 15dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu */ 16dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu 17dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhupackage com.coremedia.iso.boxes; 18dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu 19dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhuimport com.googlecode.mp4parser.AbstractContainerBox; 20dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu 21dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu/** 22dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu * Tracks are used for two purposes: (a) to contain media data (media tracks) and (b) to contain packetization 23dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu * information for streaming protocols (hint tracks). <br> 24dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu * There shall be at least one media track within an ISO file, and all the media tracks that contributed to the hint 25dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu * tracks shall remain in the file, even if the media data within them is not referenced by the hint tracks; after 26dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu * deleting all hint tracks, the entire un-hinted presentation shall remain. 27dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu */ 28dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhupublic class TrackBox extends AbstractContainerBox { 29dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu public static final String TYPE = "trak"; 30dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu 31dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu public TrackBox() { 32dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu super(TYPE); 33dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu } 34dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu 35dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu public TrackHeaderBox getTrackHeaderBox() { 36dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu for (Box box : boxes) { 37dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu if (box instanceof TrackHeaderBox) { 38dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu return (TrackHeaderBox) box; 39dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu } 40dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu } 41dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu return null; 42dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu } 43dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu 44dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu /** 45dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu * Gets the SampleTableBox at mdia/minf/stbl if existing. 46dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu * 47dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu * @return the SampleTableBox or <code>null</code> 48dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu */ 49dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu public SampleTableBox getSampleTableBox() { 50dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu MediaBox mdia = getMediaBox(); 51dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu if (mdia != null) { 52dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu MediaInformationBox minf = mdia.getMediaInformationBox(); 53dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu if (minf != null) { 54dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu return minf.getSampleTableBox(); 55dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu } 56dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu } 57dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu return null; 58dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu 59dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu } 60dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu 61dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu 62dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu public MediaBox getMediaBox() { 63dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu for (Box box : boxes) { 64dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu if (box instanceof MediaBox) { 65dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu return (MediaBox) box; 66dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu } 67dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu } 68dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu return null; 69dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu } 70dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu 71dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu} 72