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      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 
     27 namespace android {
     28 
     29 HDCP::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 
     53 HDCP::~HDCP() {
     54     Mutex::Autolock autoLock(mLock);
     55 
     56     if (mHDCPModule != NULL) {
     57         delete mHDCPModule;
     58         mHDCPModule = NULL;
     59     }
     60 
     61     if (mLibHandle != NULL) {
     62         dlclose(mLibHandle);
     63         mLibHandle = NULL;
     64     }
     65 }
     66 
     67 status_t HDCP::setObserver(const sp<IHDCPObserver> &observer) {
     68     Mutex::Autolock autoLock(mLock);
     69 
     70     if (mHDCPModule == NULL) {
     71         return NO_INIT;
     72     }
     73 
     74     mObserver = observer;
     75 
     76     return OK;
     77 }
     78 
     79 status_t HDCP::initAsync(const char *host, unsigned port) {
     80     Mutex::Autolock autoLock(mLock);
     81 
     82     if (mHDCPModule == NULL) {
     83         return NO_INIT;
     84     }
     85 
     86     return mHDCPModule->initAsync(host, port);
     87 }
     88 
     89 status_t HDCP::shutdownAsync() {
     90     Mutex::Autolock autoLock(mLock);
     91 
     92     if (mHDCPModule == NULL) {
     93         return NO_INIT;
     94     }
     95 
     96     return mHDCPModule->shutdownAsync();
     97 }
     98 
     99 status_t HDCP::encrypt(
    100         const void *inData, size_t size, uint32_t streamCTR,
    101         uint64_t *outInputCTR, void *outData) {
    102     Mutex::Autolock autoLock(mLock);
    103 
    104     if (mHDCPModule == NULL) {
    105         *outInputCTR = 0;
    106 
    107         return NO_INIT;
    108     }
    109 
    110     return mHDCPModule->encrypt(inData, size, streamCTR, outInputCTR, outData);
    111 }
    112 
    113 // static
    114 void HDCP::ObserveWrapper(void *me, int msg, int ext1, int ext2) {
    115     static_cast<HDCP *>(me)->observe(msg, ext1, ext2);
    116 }
    117 
    118 void HDCP::observe(int msg, int ext1, int ext2) {
    119     Mutex::Autolock autoLock(mLock);
    120 
    121     if (mObserver != NULL) {
    122         mObserver->notify(msg, ext1, ext2, NULL /* obj */);
    123     }
    124 }
    125 
    126 }  // namespace android
    127 
    128