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dctref.c File Reference

reference discrete cosine transform (double precision) More...

#include "libavutil/mathematics.h"
#include "dctref.h"

Go to the source code of this file.

Functions

av_cold void ff_ref_dct_init (void)
 Initialize the double precision discrete cosine transform functions fdct & idct. More...
 
void ff_ref_fdct (short *block)
 Transform 8x8 block of data with a double precision forward DCT
This is a reference implementation. More...
 
void ff_ref_idct (short *block)
 Transform 8x8 block of data with a double precision inverse DCT
This is a reference implementation. More...
 

Variables

static double coefficients [8 *8]
 

Detailed Description

reference discrete cosine transform (double precision)

Author
Dylan Yudaken (dyudaken at gmail)
Note
This file could be optimized a lot, but is for reference and so readability is better.

Definition in file dctref.c.

Function Documentation

av_cold void ff_ref_dct_init ( void  )

Initialize the double precision discrete cosine transform functions fdct & idct.

Definition at line 41 of file dctref.c.

Referenced by main().

void ff_ref_fdct ( short block)

Transform 8x8 block of data with a double precision forward DCT
This is a reference implementation.

Parameters
blockpointer to 8x8 block of data to transform

Definition at line 59 of file dctref.c.

Referenced by dct_error(), and init_block().

void ff_ref_idct ( short block)

Transform 8x8 block of data with a double precision inverse DCT
This is a reference implementation.

Parameters
blockpointer to 8x8 block of data to transform

Definition at line 95 of file dctref.c.

Referenced by dct_error().

Variable Documentation

double coefficients[8 *8]
static

Definition at line 35 of file dctref.c.

Referenced by ff_ref_dct_init(), ff_ref_fdct(), and ff_ref_idct().