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      1 /*
      2  * Copyright (C) 2019 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 "android.hardware.cas (at) 1.1-MediaCasService"
     19 
     20 #include <android/hardware/cas/1.1/ICasListener.h>
     21 #include <media/cas/CasAPI.h>
     22 #include <media/cas/DescramblerAPI.h>
     23 #include <utils/Log.h>
     24 
     25 #include "CasImpl.h"
     26 #include "DescramblerImpl.h"
     27 #include "MediaCasService.h"
     28 
     29 namespace android {
     30 namespace hardware {
     31 namespace cas {
     32 namespace V1_1 {
     33 namespace implementation {
     34 
     35 class Wrapper : public V1_1::ICasListener {
     36   public:
     37     static sp<V1_1::ICasListener> wrap(sp<V1_0::ICasListener> impl) {
     38         sp<V1_1::ICasListener> cast = V1_1::ICasListener::castFrom(impl);
     39         if (cast == NULL) {
     40             cast = new Wrapper(impl);
     41         }
     42         return cast;
     43     }
     44 
     45     virtual Return<void> onEvent(int32_t event, int32_t arg,
     46                                  const hidl_vec<uint8_t>& data) override {
     47         mImpl->onEvent(event, arg, data);
     48         return Void();
     49     }
     50 
     51     virtual Return<void> onSessionEvent(const hidl_vec<uint8_t>& /* sessionId */,
     52                                         int32_t /* event */, int32_t /* arg */,
     53                                         const hidl_vec<uint8_t>& /*data*/) override {
     54         ALOGV("Do nothing on Session Event for cas (at) 1.0 client in cas (at) 1.1");
     55         return Void();
     56     }
     57 
     58   private:
     59     Wrapper(sp<V1_0::ICasListener> impl) : mImpl(impl){};
     60     sp<V1_0::ICasListener> mImpl;
     61 };
     62 
     63 MediaCasService::MediaCasService()
     64     : mCasLoader("createCasFactory"), mDescramblerLoader("createDescramblerFactory") {}
     65 
     66 MediaCasService::~MediaCasService() {}
     67 
     68 Return<void> MediaCasService::enumeratePlugins(enumeratePlugins_cb _hidl_cb) {
     69     ALOGV("%s", __FUNCTION__);
     70 
     71     vector<HidlCasPluginDescriptor> results;
     72     mCasLoader.enumeratePlugins(&results);
     73 
     74     _hidl_cb(results);
     75     return Void();
     76 }
     77 
     78 Return<bool> MediaCasService::isSystemIdSupported(int32_t CA_system_id) {
     79     ALOGV("isSystemIdSupported: CA_system_id=%d", CA_system_id);
     80 
     81     return mCasLoader.findFactoryForScheme(CA_system_id);
     82 }
     83 
     84 Return<sp<V1_0::ICas>> MediaCasService::createPlugin(int32_t CA_system_id,
     85                                                      const sp<V1_0::ICasListener>& listener) {
     86     ALOGV("%s:Use createPluginExt to create plugin in cas (at) 1.1", __FUNCTION__);
     87 
     88     sp<ICas> result;
     89 
     90     sp<V1_1::ICasListener> listenerV1_1 = Wrapper::wrap(listener);
     91 
     92     result = createPluginExt(CA_system_id, listenerV1_1);
     93 
     94     return result;
     95 }
     96 
     97 Return<sp<ICas>> MediaCasService::createPluginExt(int32_t CA_system_id,
     98                                                   const sp<ICasListener>& listener) {
     99     ALOGV("%s: CA_system_id=%d", __FUNCTION__, CA_system_id);
    100     if (listener == NULL) ALOGV("%s: Listener is NULL", __FUNCTION__);
    101 
    102     sp<ICas> result;
    103 
    104     CasFactory* factory;
    105     sp<SharedLibrary> library;
    106     if (mCasLoader.findFactoryForScheme(CA_system_id, &library, &factory)) {
    107         CasPlugin* plugin = NULL;
    108         sp<CasImpl> casImpl = new CasImpl(listener);
    109         if (factory->createPlugin(CA_system_id, casImpl.get(), &CasImpl::CallBackExt, &plugin) ==
    110                     OK &&
    111             plugin != NULL) {
    112             casImpl->init(library, plugin);
    113             result = casImpl;
    114         }
    115     }
    116 
    117     return result;
    118 }
    119 
    120 Return<bool> MediaCasService::isDescramblerSupported(int32_t CA_system_id) {
    121     ALOGV("%s: CA_system_id=%d", __FUNCTION__, CA_system_id);
    122 
    123     return mDescramblerLoader.findFactoryForScheme(CA_system_id);
    124 }
    125 
    126 Return<sp<IDescramblerBase>> MediaCasService::createDescrambler(int32_t CA_system_id) {
    127     ALOGV("%s: CA_system_id=%d", __FUNCTION__, CA_system_id);
    128 
    129     sp<IDescrambler> result;
    130 
    131     DescramblerFactory* factory;
    132     sp<SharedLibrary> library;
    133     if (mDescramblerLoader.findFactoryForScheme(CA_system_id, &library, &factory)) {
    134         DescramblerPlugin* plugin = NULL;
    135         if (factory->createPlugin(CA_system_id, &plugin) == OK && plugin != NULL) {
    136             result = new DescramblerImpl(library, plugin);
    137         }
    138     }
    139 
    140     return result;
    141 }
    142 
    143 }  // namespace implementation
    144 }  // namespace V1_1
    145 }  // namespace cas
    146 }  // namespace hardware
    147 }  // namespace android
    148