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