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/FragmentedMP4Extractor.h" 25#include "include/WAVExtractor.h" 26#include "include/OggExtractor.h" 27#include "include/MPEG2PSExtractor.h" 28#include "include/MPEG2TSExtractor.h" 29#include "include/DRMExtractor.h" 30#include "include/WVMExtractor.h" 31#include "include/FLACExtractor.h" 32#include "include/AACExtractor.h" 33 34#include "matroska/MatroskaExtractor.h" 35 36#include <media/stagefright/foundation/AMessage.h> 37#include <media/stagefright/DataSource.h> 38#include <media/stagefright/MediaDefs.h> 39#include <media/stagefright/MediaExtractor.h> 40#include <media/stagefright/MetaData.h> 41#include <utils/String8.h> 42 43namespace android { 44 45sp<MetaData> MediaExtractor::getMetaData() { 46 return new MetaData; 47} 48 49uint32_t MediaExtractor::flags() const { 50 return CAN_SEEK_BACKWARD | CAN_SEEK_FORWARD | CAN_PAUSE | CAN_SEEK; 51} 52 53// static 54sp<MediaExtractor> MediaExtractor::Create( 55 const sp<DataSource> &source, const char *mime) { 56 sp<AMessage> meta; 57 58 String8 tmp; 59 if (mime == NULL) { 60 float confidence; 61 if (!source->sniff(&tmp, &confidence, &meta)) { 62 ALOGV("FAILED to autodetect media content."); 63 64 return NULL; 65 } 66 67 mime = tmp.string(); 68 ALOGV("Autodetected media content as '%s' with confidence %.2f", 69 mime, confidence); 70 } 71 72 bool isDrm = false; 73 // DRM MIME type syntax is "drm+type+original" where 74 // type is "es_based" or "container_based" and 75 // original is the content's cleartext MIME type 76 if (!strncmp(mime, "drm+", 4)) { 77 const char *originalMime = strchr(mime+4, '+'); 78 if (originalMime == NULL) { 79 // second + not found 80 return NULL; 81 } 82 ++originalMime; 83 if (!strncmp(mime, "drm+es_based+", 13)) { 84 // DRMExtractor sets container metadata kKeyIsDRM to 1 85 return new DRMExtractor(source, originalMime); 86 } else if (!strncmp(mime, "drm+container_based+", 20)) { 87 mime = originalMime; 88 isDrm = true; 89 } else { 90 return NULL; 91 } 92 } 93 94 MediaExtractor *ret = NULL; 95 if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_MPEG4) 96 || !strcasecmp(mime, "audio/mp4")) { 97 int fragmented = 0; 98 if (meta != NULL && meta->findInt32("fragmented", &fragmented) && fragmented) { 99 ret = new FragmentedMP4Extractor(source); 100 } else { 101 ret = new MPEG4Extractor(source); 102 } 103 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_MPEG)) { 104 ret = new MP3Extractor(source, meta); 105 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AMR_NB) 106 || !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AMR_WB)) { 107 ret = new AMRExtractor(source); 108 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_FLAC)) { 109 ret = new FLACExtractor(source); 110 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_WAV)) { 111 ret = new WAVExtractor(source); 112 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_OGG)) { 113 ret = new OggExtractor(source); 114 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_MATROSKA)) { 115 ret = new MatroskaExtractor(source); 116 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_MPEG2TS)) { 117 ret = new MPEG2TSExtractor(source); 118 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_WVM)) { 119 // Return now. WVExtractor should not have the DrmFlag set in the block below. 120 return new WVMExtractor(source); 121 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC_ADTS)) { 122 ret = new AACExtractor(source, meta); 123 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_MPEG2PS)) { 124 ret = new MPEG2PSExtractor(source); 125 } 126 127 if (ret != NULL) { 128 if (isDrm) { 129 ret->setDrmFlag(true); 130 } else { 131 ret->setDrmFlag(false); 132 } 133 } 134 135 return ret; 136} 137 138} // namespace android 139