MediaExtractor.cpp revision ee7ff20e69498ebd53dd9717a0f984188341a75e 
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 <media/stagefright/DataSource.h>
28#include <media/stagefright/MediaDefs.h>
29#include <media/stagefright/MediaExtractor.h>
30#include <media/stagefright/MetaData.h>
31#include <utils/String8.h>
32
33namespace android {
34
35sp<MetaData> MediaExtractor::getMetaData() {
36    return new MetaData;
37}
38
39uint32_t MediaExtractor::flags() const {
40    return CAN_SEEK_BACKWARD | CAN_SEEK_FORWARD | CAN_PAUSE;
41}
42
43// static
44sp<MediaExtractor> MediaExtractor::Create(
45        const sp<DataSource> &source, const char *mime) {
46    String8 tmp;
47    if (mime == NULL) {
48        float confidence;
49        if (!source->sniff(&tmp, &confidence)) {
50            LOGV("FAILED to autodetect media content.");
51
52            return NULL;
53        }
54
55        mime = tmp.string();
56        LOGV("Autodetected media content as '%s' with confidence %.2f",
57             mime, confidence);
58    }
59
60    if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_MPEG4)
61            || !strcasecmp(mime, "audio/mp4")) {
62        return new MPEG4Extractor(source);
63    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_MPEG)) {
64        return new MP3Extractor(source);
65    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AMR_NB)
66            || !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AMR_WB)) {
67        return new AMRExtractor(source);
68    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_WAV)) {
69        return new WAVExtractor(source);
70    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_OGG)) {
71        return new OggExtractor(source);
72    }
73
74    return NULL;
75}
76
77}  // namespace android
78