1 /* 2 ** 3 ** Copyright 2007, 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_TAG "IMediaExtractorService" 19 //#define LOG_NDEBUG 0 20 21 #include <utils/Log.h> 22 #include <stdint.h> 23 #include <sys/types.h> 24 #include <binder/Parcel.h> 25 #include <media/IMediaExtractorService.h> 26 27 namespace android { 28 29 enum { 30 MAKE_EXTRACTOR = IBinder::FIRST_CALL_TRANSACTION 31 }; 32 33 class BpMediaExtractorService : public BpInterface<IMediaExtractorService> 34 { 35 public: 36 BpMediaExtractorService(const sp<IBinder>& impl) 37 : BpInterface<IMediaExtractorService>(impl) 38 { 39 } 40 41 virtual sp<IMediaExtractor> makeExtractor(const sp<IDataSource> &source, const char *mime) { 42 Parcel data, reply; 43 data.writeInterfaceToken(IMediaExtractorService::getInterfaceDescriptor()); 44 data.writeStrongBinder(IInterface::asBinder(source)); 45 if (mime != NULL) { 46 data.writeCString(mime); 47 } 48 status_t ret = remote()->transact(MAKE_EXTRACTOR, data, &reply); 49 if (ret == NO_ERROR) { 50 return interface_cast<IMediaExtractor>(reply.readStrongBinder()); 51 } 52 return NULL; 53 } 54 55 }; 56 57 IMPLEMENT_META_INTERFACE(MediaExtractorService, "android.media.IMediaExtractorService"); 58 59 // ---------------------------------------------------------------------- 60 61 status_t BnMediaExtractorService::onTransact( 62 uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) 63 { 64 switch (code) { 65 66 case MAKE_EXTRACTOR: { 67 CHECK_INTERFACE(IMediaExtractorService, data, reply); 68 sp<IBinder> b; 69 status_t ret = data.readStrongBinder(&b); 70 if (ret != NO_ERROR || b == NULL) { 71 ALOGE("Error reading source from parcel"); 72 return ret; 73 } 74 // If we make an extractor through Binder, enabled shared memory 75 // for MediaBuffers for this process. 76 MediaBuffer::useSharedMemory(); 77 sp<IDataSource> source = interface_cast<IDataSource>(b); 78 const char *mime = data.readCString(); 79 sp<IMediaExtractor> ex = makeExtractor(source, mime); 80 reply->writeStrongBinder(IInterface::asBinder(ex)); 81 return NO_ERROR; 82 } 83 default: 84 return BBinder::onTransact(code, data, reply, flags); 85 } 86 } 87 88 // ---------------------------------------------------------------------------- 89 90 } // namespace android 91