Video Read/Write

Detailed Description

Utility functions for reading video frames from a file to the buffer structure and for writing from the buffer structure to a file.

Functions
int	read_video_frame (std::ifstream *stream, NvBuffer &buffer)
	Reads a video frame from a file to the buffer structure. More...
int	write_video_frame (std::ofstream *stream, NvBuffer &buffer)
	Writes a video frame from the buffer structure to a file. More...
int	dump_dmabuf (int dmabuf_fd, unsigned int plane, std::ofstream *stream)
	Writes a plane of data from the buffer to a file. More...
int	parse_csv_recon_file (std::ifstream *stream, std::string *recon_params)
	Parses the reference recon file to write the Y, U and V checksums. More...

Function Documentation

dump_dmabuf()

int dump_dmabuf	(	int	dmabuf_fd,
		unsigned int	plane,
		std::ofstream *	stream
	)

Writes a plane of data from the buffer to a file.

Parameters

[in]	dmabuf_fd	The DMABUF file descriptor of the buffer.
[in]	plane	Index of the video frame plane.
[in]	stream	A pointer to the output file stream.

Returns

0 if successful, or -1 otherwise.

parse_csv_recon_file()

int parse_csv_recon_file	(	std::ifstream *	stream,
		std::string *	recon_params
	)

Parses the reference recon file to write the Y, U and V checksums.

This function parses Y, U and V checksums from the reference recon file.

Parameters

[in]	stream	A pointer to the input recon file stream.
[in]	recon_params	A pointer to an array in which to store the parsed Y, U and V strings.

Returns

0 for success, -1 otherwise.

read_video_frame()

int read_video_frame	(	std::ifstream *	stream,
		NvBuffer &	buffer
	)

Reads a video frame from a file to the buffer structure.

This function reads data from the file into the buffer, one data plane at a time. For each data plane, the number of bytes read is:

stride * height 

or

width * height * bytes_per_pixel 

Parameters

[in]	stream	A pointer to the input file stream.
[in]	buffer	A reference to the buffer object into which data is read.

Returns

0 if successful, or -1 otherwise.

write_video_frame()

int write_video_frame	(	std::ofstream *	stream,
		NvBuffer &	buffer
	)

Writes a video frame from the buffer structure to a file.

This function writes data to the file from the buffer, one plane at a time. For each data plane, the number of bytes written is:

stride * height 

or

width * height * bytes_per_pixel 

Parameters

[in]	stream	A pointer to the output file stream.
[in]	buffer	A reference to the buffer object from which data is written.

Returns

0 if successful, or -1 otherwise.