HDCP.cpp revision a664d6b45777efb8f8b7c8a391d785f6152fa8db 
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(bool createEncryptionModule)
30    : mIsEncryptionModule(createEncryptionModule),
31      mLibHandle(NULL),
32      mHDCPModule(NULL) {
33    mLibHandle = dlopen("libstagefright_hdcp.so", RTLD_NOW);
34
35    if (mLibHandle == NULL) {
36        ALOGE("Unable to locate libstagefright_hdcp.so");
37        return;
38    }
39
40    typedef HDCPModule *(*CreateHDCPModuleFunc)(
41            void *, HDCPModule::ObserverFunc);
42
43    CreateHDCPModuleFunc createHDCPModule =
44        mIsEncryptionModule
45            ? (CreateHDCPModuleFunc)dlsym(mLibHandle, "createHDCPModule")
46            : (CreateHDCPModuleFunc)dlsym(
47                    mLibHandle, "createHDCPModuleForDecryption");
48
49    if (createHDCPModule == NULL) {
50        ALOGE("Unable to find symbol 'createHDCPModule'.");
51    } else if ((mHDCPModule = createHDCPModule(
52                    this, &HDCP::ObserveWrapper)) == NULL) {
53        ALOGE("createHDCPModule failed.");
54    }
55}
56
57HDCP::~HDCP() {
58    Mutex::Autolock autoLock(mLock);
59
60    if (mHDCPModule != NULL) {
61        delete mHDCPModule;
62        mHDCPModule = NULL;
63    }
64
65    if (mLibHandle != NULL) {
66        dlclose(mLibHandle);
67        mLibHandle = NULL;
68    }
69}
70
71status_t HDCP::setObserver(const sp<IHDCPObserver> &observer) {
72    Mutex::Autolock autoLock(mLock);
73
74    if (mHDCPModule == NULL) {
75        return NO_INIT;
76    }
77
78    mObserver = observer;
79
80    return OK;
81}
82
83status_t HDCP::initAsync(const char *host, unsigned port) {
84    Mutex::Autolock autoLock(mLock);
85
86    if (mHDCPModule == NULL) {
87        return NO_INIT;
88    }
89
90    return mHDCPModule->initAsync(host, port);
91}
92
93status_t HDCP::shutdownAsync() {
94    Mutex::Autolock autoLock(mLock);
95
96    if (mHDCPModule == NULL) {
97        return NO_INIT;
98    }
99
100    return mHDCPModule->shutdownAsync();
101}
102
103uint32_t HDCP::getCaps() {
104    Mutex::Autolock autoLock(mLock);
105
106    if (mHDCPModule == NULL) {
107        return NO_INIT;
108    }
109
110    return mHDCPModule->getCaps();
111}
112
113status_t HDCP::encrypt(
114        const void *inData, size_t size, uint32_t streamCTR,
115        uint64_t *outInputCTR, void *outData) {
116    Mutex::Autolock autoLock(mLock);
117
118    CHECK(mIsEncryptionModule);
119
120    if (mHDCPModule == NULL) {
121        *outInputCTR = 0;
122
123        return NO_INIT;
124    }
125
126    return mHDCPModule->encrypt(inData, size, streamCTR, outInputCTR, outData);
127}
128
129status_t HDCP::encryptNative(
130        const sp<GraphicBuffer> &graphicBuffer,
131        size_t offset, size_t size, uint32_t streamCTR,
132        uint64_t *outInputCTR, void *outData) {
133    Mutex::Autolock autoLock(mLock);
134
135    CHECK(mIsEncryptionModule);
136
137    if (mHDCPModule == NULL) {
138        *outInputCTR = 0;
139
140        return NO_INIT;
141    }
142
143    return mHDCPModule->encryptNative(graphicBuffer->handle,
144                    offset, size, streamCTR, outInputCTR, outData);
145}
146
147status_t HDCP::decrypt(
148        const void *inData, size_t size,
149        uint32_t streamCTR, uint64_t outInputCTR, void *outData) {
150    Mutex::Autolock autoLock(mLock);
151
152    CHECK(!mIsEncryptionModule);
153
154    if (mHDCPModule == NULL) {
155        return NO_INIT;
156    }
157
158    return mHDCPModule->decrypt(inData, size, streamCTR, outInputCTR, outData);
159}
160
161// static
162void HDCP::ObserveWrapper(void *me, int msg, int ext1, int ext2) {
163    static_cast<HDCP *>(me)->observe(msg, ext1, ext2);
164}
165
166void HDCP::observe(int msg, int ext1, int ext2) {
167    Mutex::Autolock autoLock(mLock);
168
169    if (mObserver != NULL) {
170        mObserver->notify(msg, ext1, ext2, NULL /* obj */);
171    }
172}
173
174}  // namespace android
175
176