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      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 <utils/Errors.h>
     26 #include <utils/RefBase.h>
     27 #include <utils/threads.h>
     28 #include <drm/DrmManagerClient.h>
     29 
     30 
     31 namespace android {
     32 
     33 class String8;
     34 
     35 class DataSource : public DataSourceBase, public virtual RefBase {
     36 public:
     37     DataSource() {}
     38 
     39     // returns a pointer to IDataSource if it is wrapped.
     40     virtual sp<IDataSource> getIDataSource() const {
     41         return nullptr;
     42     }
     43 
     44     virtual String8 toString() {
     45         return String8("<unspecified>");
     46     }
     47 
     48     virtual status_t reconnectAtOffset(off64_t /*offset*/) {
     49         return ERROR_UNSUPPORTED;
     50     }
     51 
     52     ////////////////////////////////////////////////////////////////////////////
     53 
     54     // for DRM
     55     virtual sp<DecryptHandle> DrmInitialization(const char * /*mime*/ = NULL) {
     56         return NULL;
     57     }
     58 
     59     virtual String8 getUri() {
     60         return String8();
     61     }
     62 
     63     virtual bool getUri(char *uriString, size_t bufferSize) final {
     64         int ret = snprintf(uriString, bufferSize, "%s", getUri().c_str());
     65         return ret >= 0 && static_cast<size_t>(ret) < bufferSize;
     66     }
     67 
     68     virtual String8 getMIMEType() const {
     69         return String8("application/octet-stream");
     70     }
     71 
     72 protected:
     73     virtual ~DataSource() {}
     74 
     75 private:
     76     DataSource(const DataSource &);
     77     DataSource &operator=(const DataSource &);
     78 };
     79 
     80 }  // namespace android
     81 
     82 #endif  // DATA_SOURCE_H_
     83