1 /* 2 ** 3 ** Copyright 2010, The Android Open Source Project 4 ** 5 ** Licensed under the Apache License, Version 2.0 (the "License"); 6 ** you may not use this file except in compliance with the License. 7 ** You may obtain a copy of the License at 8 ** 9 ** http://www.apache.org/licenses/LICENSE-2.0 10 ** 11 ** Unless required by applicable law or agreed to in writing, software 12 ** distributed under the License is distributed on an "AS IS" BASIS, 13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 ** See the License for the specific language governing permissions and 15 ** limitations under the License. 16 */ 17 18 //#define LOG_NDEBUG 0 19 #define LOG_TAG "IEffect" 20 #include <utils/Log.h> 21 #include <stdint.h> 22 #include <sys/types.h> 23 #include <binder/Parcel.h> 24 #include <media/IEffect.h> 25 26 namespace android { 27 28 enum { 29 ENABLE = IBinder::FIRST_CALL_TRANSACTION, 30 DISABLE, 31 COMMAND, 32 DISCONNECT, 33 GET_CBLK 34 }; 35 36 class BpEffect: public BpInterface<IEffect> 37 { 38 public: 39 BpEffect(const sp<IBinder>& impl) 40 : BpInterface<IEffect>(impl) 41 { 42 } 43 44 status_t enable() 45 { 46 ALOGV("enable"); 47 Parcel data, reply; 48 data.writeInterfaceToken(IEffect::getInterfaceDescriptor()); 49 remote()->transact(ENABLE, data, &reply); 50 return reply.readInt32(); 51 } 52 53 status_t disable() 54 { 55 ALOGV("disable"); 56 Parcel data, reply; 57 data.writeInterfaceToken(IEffect::getInterfaceDescriptor()); 58 remote()->transact(DISABLE, data, &reply); 59 return reply.readInt32(); 60 } 61 62 status_t command(uint32_t cmdCode, 63 uint32_t cmdSize, 64 void *pCmdData, 65 uint32_t *pReplySize, 66 void *pReplyData) 67 { 68 ALOGV("command"); 69 Parcel data, reply; 70 data.writeInterfaceToken(IEffect::getInterfaceDescriptor()); 71 data.writeInt32(cmdCode); 72 int size = cmdSize; 73 if (pCmdData == NULL) { 74 size = 0; 75 } 76 data.writeInt32(size); 77 if (size) { 78 data.write(pCmdData, size); 79 } 80 if (pReplySize == NULL) { 81 size = 0; 82 } else { 83 size = *pReplySize; 84 } 85 data.writeInt32(size); 86 87 status_t status = remote()->transact(COMMAND, data, &reply); 88 if (status != NO_ERROR) { 89 if (pReplySize != NULL) 90 *pReplySize = 0; 91 return status; 92 } 93 94 status = reply.readInt32(); 95 size = reply.readInt32(); 96 if (size != 0 && pReplyData != NULL && pReplySize != NULL) { 97 reply.read(pReplyData, size); 98 *pReplySize = size; 99 } 100 return status; 101 } 102 103 void disconnect() 104 { 105 ALOGV("disconnect"); 106 Parcel data, reply; 107 data.writeInterfaceToken(IEffect::getInterfaceDescriptor()); 108 remote()->transact(DISCONNECT, data, &reply); 109 return; 110 } 111 112 virtual sp<IMemory> getCblk() const 113 { 114 Parcel data, reply; 115 sp<IMemory> cblk; 116 data.writeInterfaceToken(IEffect::getInterfaceDescriptor()); 117 status_t status = remote()->transact(GET_CBLK, data, &reply); 118 if (status == NO_ERROR) { 119 cblk = interface_cast<IMemory>(reply.readStrongBinder()); 120 } 121 return cblk; 122 } 123 }; 124 125 IMPLEMENT_META_INTERFACE(Effect, "android.media.IEffect"); 126 127 // ---------------------------------------------------------------------- 128 129 status_t BnEffect::onTransact( 130 uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) 131 { 132 switch (code) { 133 case ENABLE: { 134 ALOGV("ENABLE"); 135 CHECK_INTERFACE(IEffect, data, reply); 136 reply->writeInt32(enable()); 137 return NO_ERROR; 138 } break; 139 140 case DISABLE: { 141 ALOGV("DISABLE"); 142 CHECK_INTERFACE(IEffect, data, reply); 143 reply->writeInt32(disable()); 144 return NO_ERROR; 145 } break; 146 147 case COMMAND: { 148 ALOGV("COMMAND"); 149 CHECK_INTERFACE(IEffect, data, reply); 150 uint32_t cmdCode = data.readInt32(); 151 uint32_t cmdSize = data.readInt32(); 152 char *cmd = NULL; 153 if (cmdSize) { 154 cmd = (char *)malloc(cmdSize); 155 data.read(cmd, cmdSize); 156 } 157 uint32_t replySize = data.readInt32(); 158 uint32_t replySz = replySize; 159 char *resp = NULL; 160 if (replySize) { 161 resp = (char *)malloc(replySize); 162 } 163 status_t status = command(cmdCode, cmdSize, cmd, &replySz, resp); 164 reply->writeInt32(status); 165 if (replySz < replySize) { 166 replySize = replySz; 167 } 168 reply->writeInt32(replySize); 169 if (replySize) { 170 reply->write(resp, replySize); 171 } 172 if (cmd) { 173 free(cmd); 174 } 175 if (resp) { 176 free(resp); 177 } 178 return NO_ERROR; 179 } break; 180 181 case DISCONNECT: { 182 ALOGV("DISCONNECT"); 183 CHECK_INTERFACE(IEffect, data, reply); 184 disconnect(); 185 return NO_ERROR; 186 } break; 187 188 case GET_CBLK: { 189 CHECK_INTERFACE(IEffect, data, reply); 190 reply->writeStrongBinder(getCblk()->asBinder()); 191 return NO_ERROR; 192 } break; 193 194 default: 195 return BBinder::onTransact(code, data, reply, flags); 196 } 197 } 198 199 // ---------------------------------------------------------------------------- 200 201 }; // namespace android 202
