IMediaPlayerService.cpp revision a514bdb58b5de4986679f72b7204b4764f7a2778
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 29namespace android { 30 31enum { 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 42class BpMediaPlayerService: public BpInterface<IMediaPlayerService> 43{ 44public: 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, int audioSessionId) { 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 data.writeInt32(audioSessionId); 79 80 remote()->transact(CREATE_URL, data, &reply); 81 82 return interface_cast<IMediaPlayer>(reply.readStrongBinder()); 83 } 84 85 virtual sp<IMediaRecorder> createMediaRecorder(pid_t pid) 86 { 87 Parcel data, reply; 88 data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor()); 89 data.writeInt32(pid); 90 remote()->transact(CREATE_MEDIA_RECORDER, data, &reply); 91 return interface_cast<IMediaRecorder>(reply.readStrongBinder()); 92 } 93 94 virtual sp<IMediaPlayer> create(pid_t pid, const sp<IMediaPlayerClient>& client, int fd, 95 int64_t offset, int64_t length, int audioSessionId) 96 { 97 Parcel data, reply; 98 data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor()); 99 data.writeInt32(pid); 100 data.writeStrongBinder(client->asBinder()); 101 data.writeFileDescriptor(fd); 102 data.writeInt64(offset); 103 data.writeInt64(length); 104 data.writeInt32(audioSessionId); 105 106 remote()->transact(CREATE_FD, data, &reply); 107 108 return interface_cast<IMediaPlayer>(reply.readStrongBinder());; 109 } 110 111 virtual sp<IMemory> decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat) 112 { 113 Parcel data, reply; 114 data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor()); 115 data.writeCString(url); 116 remote()->transact(DECODE_URL, data, &reply); 117 *pSampleRate = uint32_t(reply.readInt32()); 118 *pNumChannels = reply.readInt32(); 119 *pFormat = reply.readInt32(); 120 return interface_cast<IMemory>(reply.readStrongBinder()); 121 } 122 123 virtual sp<IMemory> decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat) 124 { 125 Parcel data, reply; 126 data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor()); 127 data.writeFileDescriptor(fd); 128 data.writeInt64(offset); 129 data.writeInt64(length); 130 remote()->transact(DECODE_FD, data, &reply); 131 *pSampleRate = uint32_t(reply.readInt32()); 132 *pNumChannels = reply.readInt32(); 133 *pFormat = reply.readInt32(); 134 return interface_cast<IMemory>(reply.readStrongBinder()); 135 } 136 137 virtual sp<IMemory> snoop() 138 { 139 Parcel data, reply; 140 data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor()); 141 remote()->transact(SNOOP, data, &reply); 142 return interface_cast<IMemory>(reply.readStrongBinder()); 143 } 144 145 virtual sp<IOMX> getOMX() { 146 Parcel data, reply; 147 data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor()); 148 remote()->transact(GET_OMX, data, &reply); 149 return interface_cast<IOMX>(reply.readStrongBinder()); 150 } 151}; 152 153IMPLEMENT_META_INTERFACE(MediaPlayerService, "android.media.IMediaPlayerService"); 154 155// ---------------------------------------------------------------------- 156 157status_t BnMediaPlayerService::onTransact( 158 uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) 159{ 160 switch(code) { 161 case CREATE_URL: { 162 CHECK_INTERFACE(IMediaPlayerService, data, reply); 163 pid_t pid = data.readInt32(); 164 sp<IMediaPlayerClient> client = 165 interface_cast<IMediaPlayerClient>(data.readStrongBinder()); 166 const char* url = data.readCString(); 167 168 KeyedVector<String8, String8> headers; 169 int32_t numHeaders = data.readInt32(); 170 for (int i = 0; i < numHeaders; ++i) { 171 String8 key = data.readString8(); 172 String8 value = data.readString8(); 173 headers.add(key, value); 174 } 175 int audioSessionId = data.readInt32(); 176 177 sp<IMediaPlayer> player = create( 178 pid, client, url, numHeaders > 0 ? &headers : NULL, audioSessionId); 179 180 reply->writeStrongBinder(player->asBinder()); 181 return NO_ERROR; 182 } break; 183 case CREATE_FD: { 184 CHECK_INTERFACE(IMediaPlayerService, data, reply); 185 pid_t pid = data.readInt32(); 186 sp<IMediaPlayerClient> client = interface_cast<IMediaPlayerClient>(data.readStrongBinder()); 187 int fd = dup(data.readFileDescriptor()); 188 int64_t offset = data.readInt64(); 189 int64_t length = data.readInt64(); 190 int audioSessionId = data.readInt32(); 191 192 sp<IMediaPlayer> player = create(pid, client, fd, offset, length, audioSessionId); 193 reply->writeStrongBinder(player->asBinder()); 194 return NO_ERROR; 195 } break; 196 case DECODE_URL: { 197 CHECK_INTERFACE(IMediaPlayerService, data, reply); 198 const char* url = data.readCString(); 199 uint32_t sampleRate; 200 int numChannels; 201 int format; 202 sp<IMemory> player = decode(url, &sampleRate, &numChannels, &format); 203 reply->writeInt32(sampleRate); 204 reply->writeInt32(numChannels); 205 reply->writeInt32(format); 206 reply->writeStrongBinder(player->asBinder()); 207 return NO_ERROR; 208 } break; 209 case DECODE_FD: { 210 CHECK_INTERFACE(IMediaPlayerService, data, reply); 211 int fd = dup(data.readFileDescriptor()); 212 int64_t offset = data.readInt64(); 213 int64_t length = data.readInt64(); 214 uint32_t sampleRate; 215 int numChannels; 216 int format; 217 sp<IMemory> player = decode(fd, offset, length, &sampleRate, &numChannels, &format); 218 reply->writeInt32(sampleRate); 219 reply->writeInt32(numChannels); 220 reply->writeInt32(format); 221 reply->writeStrongBinder(player->asBinder()); 222 return NO_ERROR; 223 } break; 224 case SNOOP: { 225 CHECK_INTERFACE(IMediaPlayerService, data, reply); 226 sp<IMemory> snooped_audio = snoop(); 227 reply->writeStrongBinder(snooped_audio->asBinder()); 228 return NO_ERROR; 229 } break; 230 case CREATE_MEDIA_RECORDER: { 231 CHECK_INTERFACE(IMediaPlayerService, data, reply); 232 pid_t pid = data.readInt32(); 233 sp<IMediaRecorder> recorder = createMediaRecorder(pid); 234 reply->writeStrongBinder(recorder->asBinder()); 235 return NO_ERROR; 236 } break; 237 case CREATE_METADATA_RETRIEVER: { 238 CHECK_INTERFACE(IMediaPlayerService, data, reply); 239 pid_t pid = data.readInt32(); 240 sp<IMediaMetadataRetriever> retriever = createMetadataRetriever(pid); 241 reply->writeStrongBinder(retriever->asBinder()); 242 return NO_ERROR; 243 } break; 244 case GET_OMX: { 245 CHECK_INTERFACE(IMediaPlayerService, data, reply); 246 sp<IOMX> omx = getOMX(); 247 reply->writeStrongBinder(omx->asBinder()); 248 return NO_ERROR; 249 } break; 250 default: 251 return BBinder::onTransact(code, data, reply, flags); 252 } 253} 254 255// ---------------------------------------------------------------------------- 256 257}; // namespace android 258