#include <math.h>
#include "libavutil/mathematics.h"
#include "dct.h"
#include "dct32.h"
Go to the source code of this file.
Defines | |
#define | SIN(s, n, x) (s->costab[(n) - (x)]) |
#define | COS(s, n, x) (s->costab[x]) |
Functions | |
static void | ff_dst_calc_I_c (DCTContext *ctx, FFTSample *data) |
static void | ff_dct_calc_I_c (DCTContext *ctx, FFTSample *data) |
static void | ff_dct_calc_III_c (DCTContext *ctx, FFTSample *data) |
static void | ff_dct_calc_II_c (DCTContext *ctx, FFTSample *data) |
static void | dct32_func (DCTContext *ctx, FFTSample *data) |
av_cold int | ff_dct_init (DCTContext *s, int nbits, enum DCTTransformType inverse) |
Set up DCT. | |
av_cold void | ff_dct_end (DCTContext *s) |
These are also known as the type II and type III DCTs respectively.
Definition in file dct.c.
#define COS | ( | s, | |||
n, | |||||
x | ) | (s->costab[x]) |
Definition at line 40 of file dct.c.
Referenced by ff_dct_calc_I_c(), ff_dct_calc_II_c(), and ff_dct_calc_III_c().
#define SIN | ( | s, | |||
n, | |||||
x | ) | (s->costab[(n) - (x)]) |
Definition at line 37 of file dct.c.
Referenced by ff_dct_calc_I_c(), ff_dct_calc_II_c(), ff_dct_calc_III_c(), and ff_dst_calc_I_c().
static void dct32_func | ( | DCTContext * | ctx, | |
FFTSample * | data | |||
) | [static] |
static void ff_dct_calc_I_c | ( | DCTContext * | ctx, | |
FFTSample * | data | |||
) | [static] |
static void ff_dct_calc_II_c | ( | DCTContext * | ctx, | |
FFTSample * | data | |||
) | [static] |
static void ff_dct_calc_III_c | ( | DCTContext * | ctx, | |
FFTSample * | data | |||
) | [static] |
av_cold void ff_dct_end | ( | DCTContext * | s | ) |
Definition at line 217 of file dct.c.
Referenced by decode_end(), main(), and wmavoice_decode_end().
av_cold int ff_dct_init | ( | DCTContext * | s, | |
int | nbits, | |||
enum DCTTransformType | type | |||
) |
Set up DCT.
nbits | size of the input array: (1 << nbits) for DCT-II, DCT-III and DST-I (1 << nbits) + 1 for DCT-I |
Definition at line 176 of file dct.c.
Referenced by decode_init(), ff_mpadsp_init(), main(), and wmavoice_decode_init().
static void ff_dst_calc_I_c | ( | DCTContext * | ctx, | |
FFTSample * | data | |||
) | [static] |