1 /* 2 * Copyright (C) 2009 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 DATA_SOURCE_H_ 18 19 #define DATA_SOURCE_H_ 20 21 #include <sys/types.h> 22 #include <media/stagefright/MediaErrors.h> 23 #include <media/DataSourceBase.h> 24 #include <media/IDataSource.h> 25 #include <media/MediaExtractorPluginApi.h> 26 #include <utils/Errors.h> 27 #include <utils/RefBase.h> 28 #include <utils/threads.h> 29 #include <drm/DrmManagerClient.h> 30 31 32 namespace android { 33 34 class String8; 35 36 class DataSource : public DataSourceBase, public virtual RefBase { 37 public: 38 DataSource() : mWrapper(NULL) {} 39 40 // returns a pointer to IDataSource if it is wrapped. 41 virtual sp<IDataSource> getIDataSource() const { 42 return nullptr; 43 } 44 45 virtual String8 toString() { 46 return String8("<unspecified>"); 47 } 48 49 virtual status_t reconnectAtOffset(off64_t /*offset*/) { 50 return ERROR_UNSUPPORTED; 51 } 52 53 //////////////////////////////////////////////////////////////////////////// 54 55 // for DRM 56 virtual sp<DecryptHandle> DrmInitialization(const char * /*mime*/ = NULL) { 57 return NULL; 58 } 59 60 virtual String8 getUri() { 61 return String8(); 62 } 63 64 virtual bool getUri(char *uriString, size_t bufferSize) final { 65 int ret = snprintf(uriString, bufferSize, "%s", getUri().c_str()); 66 return ret >= 0 && static_cast<size_t>(ret) < bufferSize; 67 } 68 69 virtual String8 getMIMEType() const { 70 return String8("application/octet-stream"); 71 } 72 73 CDataSource *wrap() { 74 if (mWrapper) { 75 return mWrapper; 76 } 77 mWrapper = new CDataSource(); 78 mWrapper->handle = this; 79 80 mWrapper->readAt = [](void *handle, off64_t offset, void *data, size_t size) -> ssize_t { 81 return ((DataSource*)handle)->readAt(offset, data, size); 82 }; 83 mWrapper->getSize = [](void *handle, off64_t *size) -> status_t { 84 return ((DataSource*)handle)->getSize(size); 85 }; 86 mWrapper->flags = [](void *handle) -> uint32_t { 87 return ((DataSource*)handle)->flags(); 88 }; 89 mWrapper->getUri = [](void *handle, char *uriString, size_t bufferSize) -> bool { 90 return ((DataSource*)handle)->getUri(uriString, bufferSize); 91 }; 92 return mWrapper; 93 } 94 95 protected: 96 virtual ~DataSource() { 97 delete mWrapper; 98 } 99 100 private: 101 CDataSource *mWrapper; 102 DataSource(const DataSource &); 103 DataSource &operator=(const DataSource &); 104 }; 105 106 } // namespace android 107 108 #endif // DATA_SOURCE_H_ 109