MntPSNRCalculator Class Reference

This component receives a YUV frame, calcuate its PSNR values, and logged the output to disk. More...

#include <mnt_psnr_calculator.h>

Inheritance diagram for MntPSNRCalculator:

List of all members.

Public Member Functions
	MntPSNRCalculator (char *input_yuv, int css, int width, int height, char *output_log)
	Constructor.
void	recv (MntData *f)
	Given an input YUV frame, this method seeks to the right position in the input YUV file, and read the original Y plane of the frame.
float	calc_psnr (MntYUVFrame *frame, unsigned char *buf)
	This method computes the PSNR values between the Y plane of a MntYUVFrame object and the image stored in a buffer.
Private Attributes
FILE *	output_file_
FILE *	original_yuv_
int	css_
int	width_
int	height_
float	ratio_

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Detailed Description

This component receives a YUV frame, calcuate its PSNR values, and logged the output to disk.

The PSNR is computed against a raw YUV video file which is specified through the constructor.

The output file contains two numbers on each line, the first, an integer, is the frame number (in display order) and the second, a floating point number, is the PNSR value.

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Constructor & Destructor Documentation

MntPSNRCalculator::MntPSNRCalculator (  char *  input_yuv, int  css, int  width, int  height, char *  output_log )

Constructor. Parameters: input_yuv  filename of the input YUV file css  color sub-sampling ratios of the input YUV file width  width of each frame in the input YUV file height  height of each frame in the input YUV file output_log  filename of the output text file to write psnr values to.

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Member Function Documentation

float MntPSNRCalculator::calc_psnr (  MntYUVFrame *  frame, unsigned char *  buf )

This method computes the PSNR values between the Y plane of a MntYUVFrame object and the image stored in a buffer. Parameters: frame  Input MntYUVFrame buf  A buffer containing the image to compare object frame against. Returns: The PSNR value.

void MntPSNRCalculator::recv (  MntData *  data  )  [virtual]

Given an input YUV frame, this method seeks to the right position in the input YUV file, and read the original Y plane of the frame. This original Y image is the compared with the Y plane of the input YUV. PSNR is computed and is logged to disk. Reimplemented from MntComponent.

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The documentation for this class was generated from the following files:

• mnt_psnr_calculator.h
• mnt_psnr_calculator.cc

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