MediaExtractor.cpp revision cda17c606b0fe3ccda4dc68a6d43882410ea2462 
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
28#include "matroska/MatroskaExtractor.h"
29
30#include <media/stagefright/DataSource.h>
31#include <media/stagefright/MediaDefs.h>
32#include <media/stagefright/MediaExtractor.h>
33#include <media/stagefright/MetaData.h>
34#include <utils/String8.h>
35
36namespace android {
37
38sp<MetaData> MediaExtractor::getMetaData() {
39    return new MetaData;
40}
41
42uint32_t MediaExtractor::flags() const {
43    return CAN_SEEK_BACKWARD | CAN_SEEK_FORWARD | CAN_PAUSE;
44}
45
46// static
47sp<MediaExtractor> MediaExtractor::Create(
48        const sp<DataSource> &source, const char *mime) {
49    String8 tmp;
50    if (mime == NULL) {
51        float confidence;
52        if (!source->sniff(&tmp, &confidence)) {
53            LOGV("FAILED to autodetect media content.");
54
55            return NULL;
56        }
57
58        mime = tmp.string();
59        LOGV("Autodetected media content as '%s' with confidence %.2f",
60             mime, confidence);
61    }
62
63    if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_MPEG4)
64            || !strcasecmp(mime, "audio/mp4")) {
65        return new MPEG4Extractor(source);
66    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_MPEG)) {
67        return new MP3Extractor(source);
68    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AMR_NB)
69            || !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AMR_WB)) {
70        return new AMRExtractor(source);
71    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_WAV)) {
72        return new WAVExtractor(source);
73    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_OGG)) {
74        return new OggExtractor(source);
75    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_MATROSKA)) {
76        return new MatroskaExtractor(source);
77    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_MPEG2TS)) {
78        return new MPEG2TSExtractor(source);
79    }
80
81    return NULL;
82}
83
84}  // namespace android
85