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 #include <utils/String8.h> 24 25 namespace android { 26 27 class IMemory; 28 class DecryptHandle; 29 30 // A binder interface for implementing a stagefright DataSource remotely. 31 class IDataSource : public IInterface { 32 public: 33 DECLARE_META_INTERFACE(DataSource); 34 35 // Get the memory that readAt writes into. 36 virtual sp<IMemory> getIMemory() = 0; 37 // Read up to |size| bytes into the memory returned by getIMemory(). Returns 38 // the number of bytes read, or negative value on error (eg. 39 // ERROR_END_OF_STREAM indicating EOS. This is needed by CallbackDataSource 40 // to properly handle reading of last chunk). |size| must not be larger than 41 // the buffer. 42 virtual ssize_t readAt(off64_t offset, size_t size) = 0; 43 // Get the size, or -1 if the size is unknown. 44 virtual status_t getSize(off64_t* size) = 0; 45 // This should be called before deleting |this|. The other methods may 46 // return errors if they're called after calling close(). 47 virtual void close() = 0; 48 // Get the flags of the source. 49 // Refer to DataSource:Flags for the definition of the flags. 50 virtual uint32_t getFlags() = 0; 51 // get a description of the source, e.g. the url or filename it is based on 52 virtual String8 toString() = 0; 53 // Initialize DRM and return a DecryptHandle. 54 virtual sp<DecryptHandle> DrmInitialization(const char *mime) = 0; 55 56 private: 57 DISALLOW_EVIL_CONSTRUCTORS(IDataSource); 58 }; 59 60 // ---------------------------------------------------------------------------- 61 62 class BnDataSource : public BnInterface<IDataSource> { 63 public: 64 virtual status_t onTransact(uint32_t code, 65 const Parcel& data, 66 Parcel* reply, 67 uint32_t flags = 0); 68 }; 69 70 }; // namespace android 71 72 #endif // ANDROID_IDATASOURCE_H 73
