MediaExtractor.cpp revision 8c8f24dce1dfc2d1eed8f7856ffceaa349afa2a6 
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#include "include/WVMExtractor.h"
29#include "include/FLACExtractor.h"
30#include "include/AACExtractor.h"
31
32#include "matroska/MatroskaExtractor.h"
33
34#include <media/stagefright/foundation/AMessage.h>
35#include <media/stagefright/DataSource.h>
36#include <media/stagefright/MediaDefs.h>
37#include <media/stagefright/MediaExtractor.h>
38#include <media/stagefright/MetaData.h>
39#include <utils/String8.h>
40
41namespace android {
42
43sp<MetaData> MediaExtractor::getMetaData() {
44    return new MetaData;
45}
46
47uint32_t MediaExtractor::flags() const {
48    return CAN_SEEK_BACKWARD | CAN_SEEK_FORWARD | CAN_PAUSE | CAN_SEEK;
49}
50
51// static
52sp<MediaExtractor> MediaExtractor::Create(
53        const sp<DataSource> &source, const char *mime) {
54    sp<AMessage> meta;
55
56    String8 tmp;
57    if (mime == NULL) {
58        float confidence;
59        if (!source->sniff(&tmp, &confidence, &meta)) {
60            LOGV("FAILED to autodetect media content.");
61
62            return NULL;
63        }
64
65        mime = tmp.string();
66        LOGV("Autodetected media content as '%s' with confidence %.2f",
67             mime, confidence);
68    }
69
70    // DRM MIME type syntax is "drm+type+original" where
71    // type is "es_based" or "container_based" and
72    // original is the content's cleartext MIME type
73    if (!strncmp(mime, "drm+", 4)) {
74        const char *originalMime = strchr(mime+4, '+');
75        if (originalMime == NULL) {
76            // second + not found
77            return NULL;
78        }
79        ++originalMime;
80        if (!strncmp(mime, "drm+es_based+", 13)) {
81            return new DRMExtractor(source, originalMime);
82        } else if (!strncmp(mime, "drm+container_based+", 20)) {
83            mime = originalMime;
84        } else {
85            return NULL;
86        }
87    }
88
89    if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_MPEG4)
90            || !strcasecmp(mime, "audio/mp4")) {
91        return new MPEG4Extractor(source);
92    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_MPEG)) {
93        return new MP3Extractor(source, meta);
94    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AMR_NB)
95            || !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AMR_WB)) {
96        return new AMRExtractor(source);
97    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_FLAC)) {
98        return new FLACExtractor(source);
99    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_WAV)) {
100        return new WAVExtractor(source);
101    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_OGG)) {
102        return new OggExtractor(source);
103    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_MATROSKA)) {
104        return new MatroskaExtractor(source);
105    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_MPEG2TS)) {
106        return new MPEG2TSExtractor(source);
107    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_WVM)) {
108        return new WVMExtractor(source);
109    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC_ADTS)) {
110        return new AACExtractor(source);
111    }
112
113    return NULL;
114}
115
116}  // namespace android
117