HDCP.cpp revision efbb781c15abf8e085f5ab8d39710bd58ea0b6e4 
1/*
2 * Copyright (C) 2012 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 "HDCP"
19#include <utils/Log.h>
20
21#include "HDCP.h"
22
23#include <media/stagefright/foundation/ADebug.h>
24
25#include <dlfcn.h>
26
27namespace android {
28
29HDCP::HDCP()
30    : mLibHandle(NULL),
31      mHDCPModule(NULL) {
32    mLibHandle = dlopen("libstagefright_hdcp.so", RTLD_NOW);
33
34    if (mLibHandle == NULL) {
35        ALOGE("Unable to locate libstagefright_hdcp.so");
36        return;
37    }
38
39    typedef HDCPModule *(*CreateHDCPModuleFunc)(
40            void *, HDCPModule::ObserverFunc);
41
42    CreateHDCPModuleFunc createHDCPModule =
43        (CreateHDCPModuleFunc)dlsym(mLibHandle, "createHDCPModule");
44
45    if (createHDCPModule == NULL) {
46        ALOGE("Unable to find symbol 'createHDCPModule'.");
47    } else if ((mHDCPModule = createHDCPModule(
48                    this, &HDCP::ObserveWrapper)) == NULL) {
49        ALOGE("createHDCPModule failed.");
50    }
51}
52
53HDCP::~HDCP() {
54    if (mHDCPModule != NULL) {
55        delete mHDCPModule;
56        mHDCPModule = NULL;
57    }
58
59    if (mLibHandle != NULL) {
60        dlclose(mLibHandle);
61        mLibHandle = NULL;
62    }
63}
64
65status_t HDCP::setObserver(const sp<IHDCPObserver> &observer) {
66    if (mHDCPModule == NULL) {
67        return NO_INIT;
68    }
69
70    mObserver = observer;
71
72    return OK;
73}
74
75status_t HDCP::initAsync(const char *host, unsigned port) {
76    if (mHDCPModule == NULL) {
77        return NO_INIT;
78    }
79
80    return mHDCPModule->initAsync(host, port);
81}
82
83status_t HDCP::shutdownAsync() {
84    if (mHDCPModule == NULL) {
85        return NO_INIT;
86    }
87
88    return mHDCPModule->shutdownAsync();
89}
90
91status_t HDCP::encrypt(
92        const void *inData, size_t size, uint32_t streamCTR,
93        uint64_t *outInputCTR, void *outData) {
94    if (mHDCPModule == NULL) {
95        *outInputCTR = 0;
96
97        return NO_INIT;
98    }
99
100    return mHDCPModule->encrypt(inData, size, streamCTR, outInputCTR, outData);
101}
102
103// static
104void HDCP::ObserveWrapper(void *me, int msg, int ext1, int ext2) {
105    static_cast<HDCP *>(me)->observe(msg, ext1, ext2);
106}
107
108void HDCP::observe(int msg, int ext1, int ext2) {
109    if (mObserver != NULL) {
110        mObserver->notify(msg, ext1, ext2, NULL /* obj */);
111    }
112}
113
114}  // namespace android
115
116