IMediaPlayerService.cpp revision 7562408b2261d38415453378b6188f74fda99d88
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#include <binder/Parcel.h> 21 22#include <binder/IMemory.h> 23#include <media/IMediaPlayerService.h> 24#include <media/IMediaRecorder.h> 25 26namespace android { 27 28enum { 29 CREATE_URL = IBinder::FIRST_CALL_TRANSACTION, 30 CREATE_FD, 31 DECODE_URL, 32 DECODE_FD, 33 CREATE_MEDIA_RECORDER, 34 CREATE_METADATA_RETRIEVER, 35}; 36 37class BpMediaPlayerService: public BpInterface<IMediaPlayerService> 38{ 39public: 40 BpMediaPlayerService(const sp<IBinder>& impl) 41 : BpInterface<IMediaPlayerService>(impl) 42 { 43 } 44 45 virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid) 46 { 47 Parcel data, reply; 48 data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor()); 49 data.writeInt32(pid); 50 remote()->transact(CREATE_METADATA_RETRIEVER, data, &reply); 51 return interface_cast<IMediaMetadataRetriever>(reply.readStrongBinder()); 52 } 53 54 virtual sp<IMediaPlayer> create(pid_t pid, const sp<IMediaPlayerClient>& client, const char* url) 55 { 56 Parcel data, reply; 57 data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor()); 58 data.writeInt32(pid); 59 data.writeStrongBinder(client->asBinder()); 60 data.writeCString(url); 61 remote()->transact(CREATE_URL, data, &reply); 62 return interface_cast<IMediaPlayer>(reply.readStrongBinder()); 63 } 64 65 virtual sp<IMediaRecorder> createMediaRecorder(pid_t pid) 66 { 67 Parcel data, reply; 68 data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor()); 69 data.writeInt32(pid); 70 remote()->transact(CREATE_MEDIA_RECORDER, data, &reply); 71 return interface_cast<IMediaRecorder>(reply.readStrongBinder()); 72 } 73 74 virtual sp<IMediaPlayer> create(pid_t pid, const sp<IMediaPlayerClient>& client, int fd, int64_t offset, int64_t length) 75 { 76 Parcel data, reply; 77 data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor()); 78 data.writeInt32(pid); 79 data.writeStrongBinder(client->asBinder()); 80 data.writeFileDescriptor(fd); 81 data.writeInt64(offset); 82 data.writeInt64(length); 83 remote()->transact(CREATE_FD, data, &reply); 84 return interface_cast<IMediaPlayer>(reply.readStrongBinder()); 85 } 86 87 virtual sp<IMemory> decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat) 88 { 89 Parcel data, reply; 90 data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor()); 91 data.writeCString(url); 92 remote()->transact(DECODE_URL, data, &reply); 93 *pSampleRate = uint32_t(reply.readInt32()); 94 *pNumChannels = reply.readInt32(); 95 *pFormat = reply.readInt32(); 96 return interface_cast<IMemory>(reply.readStrongBinder()); 97 } 98 99 virtual sp<IMemory> decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat) 100 { 101 Parcel data, reply; 102 data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor()); 103 data.writeFileDescriptor(fd); 104 data.writeInt64(offset); 105 data.writeInt64(length); 106 remote()->transact(DECODE_FD, data, &reply); 107 *pSampleRate = uint32_t(reply.readInt32()); 108 *pNumChannels = reply.readInt32(); 109 *pFormat = reply.readInt32(); 110 return interface_cast<IMemory>(reply.readStrongBinder()); 111 } 112}; 113 114IMPLEMENT_META_INTERFACE(MediaPlayerService, "android.hardware.IMediaPlayerService"); 115 116// ---------------------------------------------------------------------- 117 118#define CHECK_INTERFACE(interface, data, reply) \ 119 do { if (!data.enforceInterface(interface::getInterfaceDescriptor())) { \ 120 LOGW("Call incorrectly routed to " #interface); \ 121 return PERMISSION_DENIED; \ 122 } } while (0) 123 124status_t BnMediaPlayerService::onTransact( 125 uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) 126{ 127 switch(code) { 128 case CREATE_URL: { 129 CHECK_INTERFACE(IMediaPlayerService, data, reply); 130 pid_t pid = data.readInt32(); 131 sp<IMediaPlayerClient> client = interface_cast<IMediaPlayerClient>(data.readStrongBinder()); 132 const char* url = data.readCString(); 133 sp<IMediaPlayer> player = create(pid, client, url); 134 reply->writeStrongBinder(player->asBinder()); 135 return NO_ERROR; 136 } break; 137 case CREATE_FD: { 138 CHECK_INTERFACE(IMediaPlayerService, data, reply); 139 pid_t pid = data.readInt32(); 140 sp<IMediaPlayerClient> client = interface_cast<IMediaPlayerClient>(data.readStrongBinder()); 141 int fd = dup(data.readFileDescriptor()); 142 int64_t offset = data.readInt64(); 143 int64_t length = data.readInt64(); 144 sp<IMediaPlayer> player = create(pid, client, fd, offset, length); 145 reply->writeStrongBinder(player->asBinder()); 146 return NO_ERROR; 147 } break; 148 case DECODE_URL: { 149 CHECK_INTERFACE(IMediaPlayerService, data, reply); 150 const char* url = data.readCString(); 151 uint32_t sampleRate; 152 int numChannels; 153 int format; 154 sp<IMemory> player = decode(url, &sampleRate, &numChannels, &format); 155 reply->writeInt32(sampleRate); 156 reply->writeInt32(numChannels); 157 reply->writeInt32(format); 158 reply->writeStrongBinder(player->asBinder()); 159 return NO_ERROR; 160 } break; 161 case DECODE_FD: { 162 CHECK_INTERFACE(IMediaPlayerService, data, reply); 163 int fd = dup(data.readFileDescriptor()); 164 int64_t offset = data.readInt64(); 165 int64_t length = data.readInt64(); 166 uint32_t sampleRate; 167 int numChannels; 168 int format; 169 sp<IMemory> player = decode(fd, offset, length, &sampleRate, &numChannels, &format); 170 reply->writeInt32(sampleRate); 171 reply->writeInt32(numChannels); 172 reply->writeInt32(format); 173 reply->writeStrongBinder(player->asBinder()); 174 return NO_ERROR; 175 } break; 176 case CREATE_MEDIA_RECORDER: { 177 CHECK_INTERFACE(IMediaPlayerService, data, reply); 178 pid_t pid = data.readInt32(); 179 sp<IMediaRecorder> recorder = createMediaRecorder(pid); 180 reply->writeStrongBinder(recorder->asBinder()); 181 return NO_ERROR; 182 } break; 183 case CREATE_METADATA_RETRIEVER: { 184 CHECK_INTERFACE(IMediaPlayerService, data, reply); 185 pid_t pid = data.readInt32(); 186 sp<IMediaMetadataRetriever> retriever = createMetadataRetriever(pid); 187 reply->writeStrongBinder(retriever->asBinder()); 188 return NO_ERROR; 189 } break; 190 default: 191 return BBinder::onTransact(code, data, reply, flags); 192 } 193} 194 195// ---------------------------------------------------------------------------- 196 197}; // namespace android 198 199