1 /* 2 ** 3 ** Copyright 2008, 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 #include <stdint.h> 19 #include <sys/types.h> 20 21 #include <binder/Parcel.h> 22 #include <binder/IMemory.h> 23 #include <media/IMediaPlayerService.h> 24 #include <media/IMediaRecorder.h> 25 #include <media/IOMX.h> 26 27 #include <utils/Errors.h> // for status_t 28 29 namespace android { 30 31 enum { 32 CREATE_URL = IBinder::FIRST_CALL_TRANSACTION, 33 CREATE_FD, 34 DECODE_URL, 35 DECODE_FD, 36 CREATE_MEDIA_RECORDER, 37 CREATE_METADATA_RETRIEVER, 38 GET_OMX, 39 SNOOP 40 }; 41 42 class BpMediaPlayerService: public BpInterface<IMediaPlayerService> 43 { 44 public: 45 BpMediaPlayerService(const sp<IBinder>& impl) 46 : BpInterface<IMediaPlayerService>(impl) 47 { 48 } 49 50 virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid) 51 { 52 Parcel data, reply; 53 data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor()); 54 data.writeInt32(pid); 55 remote()->transact(CREATE_METADATA_RETRIEVER, data, &reply); 56 return interface_cast<IMediaMetadataRetriever>(reply.readStrongBinder()); 57 } 58 59 virtual sp<IMediaPlayer> create( 60 pid_t pid, const sp<IMediaPlayerClient>& client, 61 const char* url, const KeyedVector<String8, String8> *headers) { 62 Parcel data, reply; 63 data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor()); 64 data.writeInt32(pid); 65 data.writeStrongBinder(client->asBinder()); 66 data.writeCString(url); 67 68 if (headers == NULL) { 69 data.writeInt32(0); 70 } else { 71 // serialize the headers 72 data.writeInt32(headers->size()); 73 for (size_t i = 0; i < headers->size(); ++i) { 74 data.writeString8(headers->keyAt(i)); 75 data.writeString8(headers->valueAt(i)); 76 } 77 } 78 79 remote()->transact(CREATE_URL, data, &reply); 80 return interface_cast<IMediaPlayer>(reply.readStrongBinder()); 81 } 82 83 virtual sp<IMediaRecorder> createMediaRecorder(pid_t pid) 84 { 85 Parcel data, reply; 86 data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor()); 87 data.writeInt32(pid); 88 remote()->transact(CREATE_MEDIA_RECORDER, data, &reply); 89 return interface_cast<IMediaRecorder>(reply.readStrongBinder()); 90 } 91 92 virtual sp<IMediaPlayer> create(pid_t pid, const sp<IMediaPlayerClient>& client, int fd, int64_t offset, int64_t length) 93 { 94 Parcel data, reply; 95 data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor()); 96 data.writeInt32(pid); 97 data.writeStrongBinder(client->asBinder()); 98 data.writeFileDescriptor(fd); 99 data.writeInt64(offset); 100 data.writeInt64(length); 101 remote()->transact(CREATE_FD, data, &reply); 102 return interface_cast<IMediaPlayer>(reply.readStrongBinder()); 103 } 104 105 virtual sp<IMemory> decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat) 106 { 107 Parcel data, reply; 108 data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor()); 109 data.writeCString(url); 110 remote()->transact(DECODE_URL, data, &reply); 111 *pSampleRate = uint32_t(reply.readInt32()); 112 *pNumChannels = reply.readInt32(); 113 *pFormat = reply.readInt32(); 114 return interface_cast<IMemory>(reply.readStrongBinder()); 115 } 116 117 virtual sp<IMemory> decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat) 118 { 119 Parcel data, reply; 120 data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor()); 121 data.writeFileDescriptor(fd); 122 data.writeInt64(offset); 123 data.writeInt64(length); 124 remote()->transact(DECODE_FD, data, &reply); 125 *pSampleRate = uint32_t(reply.readInt32()); 126 *pNumChannels = reply.readInt32(); 127 *pFormat = reply.readInt32(); 128 return interface_cast<IMemory>(reply.readStrongBinder()); 129 } 130 131 virtual sp<IMemory> snoop() 132 { 133 Parcel data, reply; 134 data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor()); 135 remote()->transact(SNOOP, data, &reply); 136 return interface_cast<IMemory>(reply.readStrongBinder()); 137 } 138 139 virtual sp<IOMX> getOMX() { 140 Parcel data, reply; 141 data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor()); 142 remote()->transact(GET_OMX, data, &reply); 143 return interface_cast<IOMX>(reply.readStrongBinder()); 144 } 145 }; 146 147 IMPLEMENT_META_INTERFACE(MediaPlayerService, "android.media.IMediaPlayerService"); 148 149 // ---------------------------------------------------------------------- 150 151 status_t BnMediaPlayerService::onTransact( 152 uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) 153 { 154 switch(code) { 155 case CREATE_URL: { 156 CHECK_INTERFACE(IMediaPlayerService, data, reply); 157 pid_t pid = data.readInt32(); 158 sp<IMediaPlayerClient> client = 159 interface_cast<IMediaPlayerClient>(data.readStrongBinder()); 160 const char* url = data.readCString(); 161 162 KeyedVector<String8, String8> headers; 163 int32_t numHeaders = data.readInt32(); 164 for (int i = 0; i < numHeaders; ++i) { 165 String8 key = data.readString8(); 166 String8 value = data.readString8(); 167 headers.add(key, value); 168 } 169 170 sp<IMediaPlayer> player = create( 171 pid, client, url, numHeaders > 0 ? &headers : NULL); 172 173 reply->writeStrongBinder(player->asBinder()); 174 return NO_ERROR; 175 } break; 176 case CREATE_FD: { 177 CHECK_INTERFACE(IMediaPlayerService, data, reply); 178 pid_t pid = data.readInt32(); 179 sp<IMediaPlayerClient> client = interface_cast<IMediaPlayerClient>(data.readStrongBinder()); 180 int fd = dup(data.readFileDescriptor()); 181 int64_t offset = data.readInt64(); 182 int64_t length = data.readInt64(); 183 sp<IMediaPlayer> player = create(pid, client, fd, offset, length); 184 reply->writeStrongBinder(player->asBinder()); 185 return NO_ERROR; 186 } break; 187 case DECODE_URL: { 188 CHECK_INTERFACE(IMediaPlayerService, data, reply); 189 const char* url = data.readCString(); 190 uint32_t sampleRate; 191 int numChannels; 192 int format; 193 sp<IMemory> player = decode(url, &sampleRate, &numChannels, &format); 194 reply->writeInt32(sampleRate); 195 reply->writeInt32(numChannels); 196 reply->writeInt32(format); 197 reply->writeStrongBinder(player->asBinder()); 198 return NO_ERROR; 199 } break; 200 case DECODE_FD: { 201 CHECK_INTERFACE(IMediaPlayerService, data, reply); 202 int fd = dup(data.readFileDescriptor()); 203 int64_t offset = data.readInt64(); 204 int64_t length = data.readInt64(); 205 uint32_t sampleRate; 206 int numChannels; 207 int format; 208 sp<IMemory> player = decode(fd, offset, length, &sampleRate, &numChannels, &format); 209 reply->writeInt32(sampleRate); 210 reply->writeInt32(numChannels); 211 reply->writeInt32(format); 212 reply->writeStrongBinder(player->asBinder()); 213 return NO_ERROR; 214 } break; 215 case SNOOP: { 216 CHECK_INTERFACE(IMediaPlayerService, data, reply); 217 sp<IMemory> snooped_audio = snoop(); 218 reply->writeStrongBinder(snooped_audio->asBinder()); 219 return NO_ERROR; 220 } break; 221 case CREATE_MEDIA_RECORDER: { 222 CHECK_INTERFACE(IMediaPlayerService, data, reply); 223 pid_t pid = data.readInt32(); 224 sp<IMediaRecorder> recorder = createMediaRecorder(pid); 225 reply->writeStrongBinder(recorder->asBinder()); 226 return NO_ERROR; 227 } break; 228 case CREATE_METADATA_RETRIEVER: { 229 CHECK_INTERFACE(IMediaPlayerService, data, reply); 230 pid_t pid = data.readInt32(); 231 sp<IMediaMetadataRetriever> retriever = createMetadataRetriever(pid); 232 reply->writeStrongBinder(retriever->asBinder()); 233 return NO_ERROR; 234 } break; 235 case GET_OMX: { 236 CHECK_INTERFACE(IMediaPlayerService, data, reply); 237 sp<IOMX> omx = getOMX(); 238 reply->writeStrongBinder(omx->asBinder()); 239 return NO_ERROR; 240 } break; 241 default: 242 return BBinder::onTransact(code, data, reply, flags); 243 } 244 } 245 246 // ---------------------------------------------------------------------------- 247 248 }; // namespace android 249
