1dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu/* 2dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu * Copyright 2012 Sebastian Annies, 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 Zhupackage com.googlecode.mp4parser.authoring.builder; 17dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu 18dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhuimport com.coremedia.iso.boxes.TimeToSampleBox; 19dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhuimport com.googlecode.mp4parser.authoring.Movie; 20dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhuimport com.googlecode.mp4parser.authoring.Track; 21dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu 22dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhuimport java.util.Arrays; 23dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhuimport java.util.List; 24dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu 25dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu/** 26dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu * This <code>FragmentIntersectionFinder</code> cuts the input movie in 2 second 27dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu * snippets. 28dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu */ 29dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhupublic class TwoSecondIntersectionFinder implements FragmentIntersectionFinder { 30dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu 31dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu protected long getDuration(Track track) { 32dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu long duration = 0; 33dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu for (TimeToSampleBox.Entry entry : track.getDecodingTimeEntries()) { 34dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu duration += entry.getCount() * entry.getDelta(); 35dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu } 36dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu return duration; 37dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu } 38dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu 39dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu /** 40dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu * {@inheritDoc} 41dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu */ 42dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu public long[] sampleNumbers(Track track, Movie movie) { 43dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu List<TimeToSampleBox.Entry> entries = track.getDecodingTimeEntries(); 44dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu 45dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu double trackLength = 0; 46dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu for (Track thisTrack : movie.getTracks()) { 47dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu double thisTracksLength = getDuration(thisTrack) / thisTrack.getTrackMetaData().getTimescale(); 48dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu if (trackLength < thisTracksLength) { 49dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu trackLength = thisTracksLength; 50dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu } 51dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu } 52dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu 53dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu int fragmentCount = (int)Math.ceil(trackLength / 2) - 1; 54dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu if (fragmentCount < 1) { 55dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu fragmentCount = 1; 56dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu } 57dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu 58dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu long fragments[] = new long[fragmentCount]; 59dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu Arrays.fill(fragments, -1); 60dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu fragments[0] = 1; 61dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu 62dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu long time = 0; 63dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu int samples = 0; 64dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu for (TimeToSampleBox.Entry entry : entries) { 65dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu for (int i = 0; i < entry.getCount(); i++) { 66dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu int currentFragment = (int) (time / track.getTrackMetaData().getTimescale() / 2) + 1; 67dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu if (currentFragment >= fragments.length) { 68dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu break; 69dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu } 70dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu fragments[currentFragment] = samples++ + 1; 71dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu time += entry.getDelta(); 72dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu } 73dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu } 74dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu long last = samples + 1; 75dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu // fill all -1 ones. 76dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu for (int i = fragments.length - 1; i >= 0; i--) { 77dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu if (fragments[i] == -1) { 78dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu fragments[i] = last ; 79dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu } 80dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu last = fragments[i]; 81dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu } 82dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu return fragments; 83dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu 84dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu } 85dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu 86dd9eb897ee7c7b507cbdcf80263bb4b5de6966bfTeng-Hui Zhu} 87