Method read

src/cinder/audio/linux/FileAudioLoader.cpp:129–135

// ----------------------------------------------------------------------------------------------------
struct IStreamMpg123 {
	static ssize_t read( void* userData, void* ptr, size_t count ) {
		ci::IStreamCinder* stream = static_cast<ci::IStreamCinder*>( userData );
		size_t pos0 = stream->tell();
		stream->readData( ptr, count );
		size_t pos1 = stream->tell();
		return pos1 - pos0;
	}

	static off_t seek( void* userData, off_t offset, int whence ) {
		ci::IStreamCinder* stream = static_cast<ci::IStreamCinder*>( userData );