VideoDataReader

touchgfx/hal/VideoController.hpp

Interface for classes reading video data from non-memory-mapped flash storage.

Public Functions

virtual uint32_t	getDataLength() =0
	Get the length of the data (file).
virtual bool	readData(void * dst, uint32_t bytes) =0
	Read data from flash to a buffer.
virtual void	seek(uint32_t position) =0
	Seek to a specific position in the data (file).
virtual	~VideoDataReader()
	Virtual destructor.

Public Functions Documentation

getDataLength

virtual uint32_t getDataLength	(			)	=0

Get the length of the data (file).

Returns:

The length of the data.

readData

virtual bool readData	(	void *	dst ,		=0
		uint32_t	bytes		=0
		)	=0

Read data from flash to a buffer.

This must be a synchrony method that does not return until the copy is done.

Parameters:

dst	Address of destination buffer in RAM.
bytes	Number of bytes to copy.

Returns:

Returns true if read was successful.

seek

virtual void seek	(	uint32_t	position	)

Seek to a specific position in the data (file).

Parameters:

position	Byte position in the data that is needed next.

~VideoDataReader

virtual ~VideoDataReader	(			)

Virtual destructor.