1 /* 2 * Copyright 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_IDATASOURCE_H 18 #define ANDROID_IDATASOURCE_H 19 20 #include <binder/IInterface.h> 21 #include <media/stagefright/foundation/ABase.h> 22 #include <utils/Errors.h> 23 24 namespace android { 25 26 class IMemory; 27 28 // A binder interface for implementing a stagefright DataSource remotely. 29 class IDataSource : public IInterface { 30 public: 31 DECLARE_META_INTERFACE(DataSource); 32 33 // Get the memory that readAt writes into. 34 virtual sp<IMemory> getIMemory() = 0; 35 // Read up to |size| bytes into the memory returned by getIMemory(). Returns 36 // the number of bytes read, or -1 on error. |size| must not be larger than 37 // the buffer. 38 virtual ssize_t readAt(off64_t offset, size_t size) = 0; 39 // Get the size, or -1 if the size is unknown. 40 virtual status_t getSize(off64_t* size) = 0; 41 // This should be called before deleting |this|. The other methods may 42 // return errors if they're called after calling close(). 43 virtual void close() = 0; 44 45 private: 46 DISALLOW_EVIL_CONSTRUCTORS(IDataSource); 47 }; 48 49 // ---------------------------------------------------------------------------- 50 51 class BnDataSource : public BnInterface<IDataSource> { 52 public: 53 virtual status_t onTransact(uint32_t code, 54 const Parcel& data, 55 Parcel* reply, 56 uint32_t flags = 0); 57 }; 58 59 }; // namespace android 60 61 #endif // ANDROID_IDATASOURCE_H 62