MediaExtractor.cpp revision 6d309134e3a2c8c1687724a8a8632424ce9a1e33
1/* 2 * Copyright (C) 2009 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17//#define LOG_NDEBUG 0 18#define LOG_TAG "MediaExtractor" 19#include <utils/Log.h> 20 21#include "include/AMRExtractor.h" 22#include "include/MP3Extractor.h" 23#include "include/MPEG4Extractor.h" 24#include "include/WAVExtractor.h" 25#include "include/OggExtractor.h" 26#include "include/MPEG2TSExtractor.h" 27#include "include/DRMExtractor.h" 28 29#include "matroska/MatroskaExtractor.h" 30 31#include <media/stagefright/foundation/AMessage.h> 32#include <media/stagefright/DataSource.h> 33#include <media/stagefright/MediaDefs.h> 34#include <media/stagefright/MediaExtractor.h> 35#include <media/stagefright/MetaData.h> 36#include <utils/String8.h> 37 38namespace android { 39 40sp<MetaData> MediaExtractor::getMetaData() { 41 return new MetaData; 42} 43 44uint32_t MediaExtractor::flags() const { 45 return CAN_SEEK_BACKWARD | CAN_SEEK_FORWARD | CAN_PAUSE | CAN_SEEK; 46} 47 48// static 49sp<MediaExtractor> MediaExtractor::Create( 50 const sp<DataSource> &source, const char *mime) { 51 sp<AMessage> meta; 52 53 String8 tmp; 54 if (mime == NULL) { 55 float confidence; 56 if (!source->sniff(&tmp, &confidence, &meta)) { 57 LOGV("FAILED to autodetect media content."); 58 59 return NULL; 60 } 61 62 mime = tmp.string(); 63 LOGV("Autodetected media content as '%s' with confidence %.2f", 64 mime, confidence); 65 } 66 67 if (!strncmp(mime, "drm", 3)) { 68 const char *originalMime = strrchr(mime, '+') + 1; 69 70 if (!strncmp(mime, "drm+es_based", 12)) { 71 return new DRMExtractor(source, originalMime); 72 } else if (!strncmp(mime, "drm+container_based", 19)) { 73 mime = originalMime; 74 } else { 75 return NULL; 76 } 77 } 78 79 if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_MPEG4) 80 || !strcasecmp(mime, "audio/mp4")) { 81 return new MPEG4Extractor(source); 82 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_MPEG)) { 83 return new MP3Extractor(source, meta); 84 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AMR_NB) 85 || !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AMR_WB)) { 86 return new AMRExtractor(source); 87 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_WAV)) { 88 return new WAVExtractor(source); 89 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_OGG)) { 90 return new OggExtractor(source); 91 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_MATROSKA)) { 92 return new MatroskaExtractor(source); 93 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_MPEG2TS)) { 94 return new MPEG2TSExtractor(source); 95 } 96 97 return NULL; 98} 99 100} // namespace android 101