MediaExtractor.cpp revision f75978f63a25e79c683e96611f95cb5cd49efd3d 
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 <media/stagefright/AMRExtractor.h>
22#include <media/stagefright/DataSource.h>
23#include <media/stagefright/MP3Extractor.h>
24#include <media/stagefright/MPEG4Extractor.h>
25#include <media/stagefright/MediaExtractor.h>
26#include <utils/String8.h>
27
28namespace android {
29
30// static
31sp<MediaExtractor> MediaExtractor::Create(
32        const sp<DataSource> &source, const char *mime) {
33    String8 tmp;
34    if (mime == NULL) {
35        float confidence;
36        if (!source->sniff(&tmp, &confidence)) {
37            LOGE("FAILED to autodetect media content.");
38
39            return NULL;
40        }
41
42        mime = tmp.string();
43        LOGI("Autodetected media content as '%s' with confidence %.2f",
44             mime, confidence);
45    }
46
47    if (!strcasecmp(mime, "video/mp4") || !strcasecmp(mime, "audio/mp4")) {
48        return new MPEG4Extractor(source);
49    } else if (!strcasecmp(mime, "audio/mpeg")) {
50        return new MP3Extractor(source);
51    } else if (!strcasecmp(mime, "audio/3gpp")
52            || !strcasecmp(mime, "audio/amr-wb")) {
53        return new AMRExtractor(source);
54    }
55
56    return NULL;
57}
58
59}  // namespace android
60