MediaExtractor.cpp revision 66326a5ee0869f1ee4d136a477e6effba428b3cb 
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
25#include <media/stagefright/DataSource.h>
26#include <media/stagefright/MediaDefs.h>
27#include <media/stagefright/MediaExtractor.h>
28#include <utils/String8.h>
29
30namespace android {
31
32// static
33sp<MediaExtractor> MediaExtractor::Create(
34        const sp<DataSource> &source, const char *mime) {
35    String8 tmp;
36    if (mime == NULL) {
37        float confidence;
38        if (!source->sniff(&tmp, &confidence)) {
39            LOGE("FAILED to autodetect media content.");
40
41            return NULL;
42        }
43
44        mime = tmp.string();
45        LOGV("Autodetected media content as '%s' with confidence %.2f",
46             mime, confidence);
47    }
48
49    if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_MPEG4)
50            || !strcasecmp(mime, "audio/mp4")) {
51        return new MPEG4Extractor(source);
52    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_MPEG)) {
53        return new MP3Extractor(source);
54    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AMR_NB)
55            || !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AMR_WB)) {
56        return new AMRExtractor(source);
57    }
58
59    return NULL;
60}
61
62}  // namespace android
63