HDCP.cpp revision 308bcaa44e578279e61be32b572fdb0b11b1e4c7 
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
103status_t HDCP::encrypt(
104        const void *inData, size_t size, uint32_t streamCTR,
105        uint64_t *outInputCTR, void *outData) {
106    Mutex::Autolock autoLock(mLock);
107
108    CHECK(mIsEncryptionModule);
109
110    if (mHDCPModule == NULL) {
111        *outInputCTR = 0;
112
113        return NO_INIT;
114    }
115
116    return mHDCPModule->encrypt(inData, size, streamCTR, outInputCTR, outData);
117}
118
119status_t HDCP::encryptNative(
120        const sp<GraphicBuffer> &graphicBuffer,
121        size_t offset, size_t size, uint32_t streamCTR,
122        uint64_t *outInputCTR, void *outData) {
123    Mutex::Autolock autoLock(mLock);
124
125    CHECK(mIsEncryptionModule);
126
127    if (mHDCPModule == NULL) {
128        *outInputCTR = 0;
129
130        return NO_INIT;
131    }
132
133    return mHDCPModule->encryptNative(graphicBuffer->handle,
134                    offset, size, streamCTR, outInputCTR, outData);
135}
136
137status_t HDCP::decrypt(
138        const void *inData, size_t size,
139        uint32_t streamCTR, uint64_t outInputCTR, void *outData) {
140    Mutex::Autolock autoLock(mLock);
141
142    CHECK(!mIsEncryptionModule);
143
144    if (mHDCPModule == NULL) {
145        return NO_INIT;
146    }
147
148    return mHDCPModule->decrypt(inData, size, streamCTR, outInputCTR, outData);
149}
150
151// static
152void HDCP::ObserveWrapper(void *me, int msg, int ext1, int ext2) {
153    static_cast<HDCP *>(me)->observe(msg, ext1, ext2);
154}
155
156void HDCP::observe(int msg, int ext1, int ext2) {
157    Mutex::Autolock autoLock(mLock);
158
159    if (mObserver != NULL) {
160        mObserver->notify(msg, ext1, ext2, NULL /* obj */);
161    }
162}
163
164}  // namespace android
165
166