Let's open and play an MP3 music file with OpenSL ES:
MP3 files are opened by OpenSL using a POSIX file descriptor pointing to the chosen file. Improve
jni/ResourceManager.cppcreated in the previous chapters by defining a new structureResourceDescriptorand appending a new methoddescriptor():... struct ResourceDescriptor { int32_t mDescriptor; off_t mStart; off_t mLength; }; class Resource { public: ... status open(); void close(); status read(void* pBuffer, size_t pCount); ResourceDescriptor descriptor(); bool operator==(const Resource& pOther); private: ... }; #endif
Implement
jni/ResourceManager.cpp. Of course, makes use of the asset manager API to open the descriptor and fill aResourceDescriptorstructure:... ResourceDescriptor Resource::descriptor() { ResourceDescriptor lDescriptor = { -1, 0, 0 }; AAsset* lAsset = AAssetManager_open(mAssetManager, mPath, ...