MediaExtractor.cpp revision 093437c388e5dff6903a3d43f2ca9f8a1ba4744a 
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
27#include "matroska/MatroskaExtractor.h"
28
29#include <media/stagefright/DataSource.h>
30#include <media/stagefright/MediaDefs.h>
31#include <media/stagefright/MediaExtractor.h>
32#include <media/stagefright/MetaData.h>
33#include <utils/String8.h>
34
35namespace android {
36
37sp<MetaData> MediaExtractor::getMetaData() {
38    return new MetaData;
39}
40
41uint32_t MediaExtractor::flags() const {
42    return CAN_SEEK_BACKWARD | CAN_SEEK_FORWARD | CAN_PAUSE;
43}
44
45// static
46sp<MediaExtractor> MediaExtractor::Create(
47        const sp<DataSource> &source, const char *mime) {
48    String8 tmp;
49    if (mime == NULL) {
50        float confidence;
51        if (!source->sniff(&tmp, &confidence)) {
52            LOGV("FAILED to autodetect media content.");
53
54            return NULL;
55        }
56
57        mime = tmp.string();
58        LOGV("Autodetected media content as '%s' with confidence %.2f",
59             mime, confidence);
60    }
61
62    if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_MPEG4)
63            || !strcasecmp(mime, "audio/mp4")) {
64        return new MPEG4Extractor(source);
65    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_MPEG)) {
66        return new MP3Extractor(source);
67    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AMR_NB)
68            || !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AMR_WB)) {
69        return new AMRExtractor(source);
70    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_WAV)) {
71        return new WAVExtractor(source);
72    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_OGG)) {
73        return new OggExtractor(source);
74    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_MATROSKA)) {
75        return new MatroskaExtractor(source);
76    }
77
78    return NULL;
79}
80
81}  // namespace android
82