MediaExtractor.cpp revision fc9ba09e3bb368f823d473f5e2bb9aa32dba6289 
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
26#include <media/stagefright/DataSource.h>
27#include <media/stagefright/MediaDefs.h>
28#include <media/stagefright/MediaExtractor.h>
29#include <media/stagefright/MetaData.h>
30#include <utils/String8.h>
31
32namespace android {
33
34sp<MetaData> MediaExtractor::getMetaData() {
35    return new MetaData;
36}
37
38// static
39sp<MediaExtractor> MediaExtractor::Create(
40        const sp<DataSource> &source, const char *mime) {
41    String8 tmp;
42    if (mime == NULL) {
43        float confidence;
44        if (!source->sniff(&tmp, &confidence)) {
45            LOGV("FAILED to autodetect media content.");
46
47            return NULL;
48        }
49
50        mime = tmp.string();
51        LOGV("Autodetected media content as '%s' with confidence %.2f",
52             mime, confidence);
53    }
54
55    if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_MPEG4)
56            || !strcasecmp(mime, "audio/mp4")) {
57        return new MPEG4Extractor(source);
58    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_MPEG)) {
59        return new MP3Extractor(source);
60    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AMR_NB)
61            || !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AMR_WB)) {
62        return new AMRExtractor(source);
63    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_WAV)) {
64        return new WAVExtractor(source);
65    }
66
67    return NULL;
68}
69
70// static
71sp<MediaExtractor> MediaExtractor::CreateFromURI(
72        const char *uri, const char *mime) {
73    sp<DataSource> source = DataSource::CreateFromURI(uri);
74
75    if (source == NULL || source->initCheck() != OK) {
76        return NULL;
77    }
78
79    return Create(source, mime);
80}
81
82}  // namespace android
83