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