WVMExtractor.cpp revision 785ee06d106cd7958e0c151ebc6b7174d9ba861e 
1/*
2 * Copyright (C) 2010 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_TAG "WVMExtractor"
18#include <utils/Log.h>
19
20#include "include/WVMExtractor.h"
21
22#include <arpa/inet.h>
23#include <utils/String8.h>
24#include <media/stagefright/Utils.h>
25#include <media/stagefright/DataSource.h>
26#include <media/stagefright/MediaSource.h>
27#include <media/stagefright/MediaDefs.h>
28#include <media/stagefright/MetaData.h>
29#include <media/stagefright/MediaErrors.h>
30#include <media/stagefright/MediaBuffer.h>
31#include <media/stagefright/MediaDebug.h>
32#include <dlfcn.h>
33
34#include <utils/Errors.h>
35
36/* The extractor lifetime is short - just long enough to get
37 * the media sources constructed - so the shared lib needs to remain open
38 * beyond the lifetime of the extractor.  So keep the handle as a global
39 * rather than a member of the extractor
40 */
41void *gVendorLibHandle = NULL;
42
43namespace android {
44
45static Mutex gWVMutex;
46
47WVMExtractor::WVMExtractor(const sp<DataSource> &source)
48    : mDataSource(source) {
49    {
50        Mutex::Autolock autoLock(gWVMutex);
51        if (gVendorLibHandle == NULL) {
52            gVendorLibHandle = dlopen("libwvm.so", RTLD_NOW);
53        }
54
55        if (gVendorLibHandle == NULL) {
56            LOGE("Failed to open libwvm.so");
57            return;
58        }
59    }
60
61    typedef WVMLoadableExtractor *(*GetInstanceFunc)(sp<DataSource>);
62    GetInstanceFunc getInstanceFunc =
63        (GetInstanceFunc) dlsym(gVendorLibHandle,
64                "_ZN7android11GetInstanceENS_2spINS_10DataSourceEEE");
65
66    if (getInstanceFunc) {
67        mImpl = (*getInstanceFunc)(source);
68        CHECK(mImpl != NULL);
69    } else {
70        LOGE("Failed to locate GetInstance in libwvm.so");
71    }
72}
73
74WVMExtractor::~WVMExtractor() {
75}
76
77size_t WVMExtractor::countTracks() {
78    return (mImpl != NULL) ? mImpl->countTracks() : 0;
79}
80
81sp<MediaSource> WVMExtractor::getTrack(size_t index) {
82    if (mImpl == NULL) {
83        return NULL;
84    }
85    return mImpl->getTrack(index);
86}
87
88sp<MetaData> WVMExtractor::getTrackMetaData(size_t index, uint32_t flags) {
89    if (mImpl == NULL) {
90        return NULL;
91    }
92    return mImpl->getTrackMetaData(index, flags);
93}
94
95sp<MetaData> WVMExtractor::getMetaData() {
96    if (mImpl == NULL) {
97        return NULL;
98    }
99    return mImpl->getMetaData();
100}
101
102int64_t WVMExtractor::getCachedDurationUs(status_t *finalStatus) {
103    if (mImpl == NULL) {
104        return 0;
105    }
106
107    return mImpl->getCachedDurationUs(finalStatus);
108}
109
110void WVMExtractor::setAdaptiveStreamingMode(bool adaptive) {
111    if (mImpl != NULL) {
112        mImpl->setAdaptiveStreamingMode(adaptive);
113    }
114}
115
116} //namespace android
117
118