hvirtual/libmpeg3/audio/dct.c File Reference

#include "mpeg3private.h"
#include "mpeg3protos.h"
#include "tables.h"
#include <math.h>

Include dependency graph for dct.c:

Go to the source code of this file.

Defines
#define	MACRO(v)
#define	DCT12_PART1
#define	DCT12_PART2
Functions
int	mpeg3audio_dct64_1 (float *out0, float *out1, float *b1, float *b2, float *samples)
int	mpeg3audio_dct64 (float *a, float *b, float *c)
int	mpeg3audio_dct36 (float *inbuf, float *o1, float *o2, float *wintab, float *tsbuf)
int	mpeg3audio_dct12 (float *in, float *rawout1, float *rawout2, register float *wi, register float *ts)

---

Define Documentation

#define DCT12_PART1

Value:

in5 = in[5*3]; \
    in5 += (in4 = in[4*3]); \
    in4 += (in3 = in[3*3]); \
    in3 += (in2 = in[2*3]); \
    in2 += (in1 = in[1*3]); \
    in1 += (in0 = in[0*3]); \
                            \
    in5 += in3; in3 += in1; \
                            \
    in2 *= mpeg3_COS6_1; \
    in3 *= mpeg3_COS6_1; \

Referenced by mpeg3audio_dct12().

#define DCT12_PART2

Value:

in0 += in4 * mpeg3_COS6_2; \
                         \
        in4 = in0 + in2;     \
        in0 -= in2;          \
                         \
        in1 += in5 * mpeg3_COS6_2; \
                         \
        in5 = (in1 + in3) * mpeg3_tfcos12[0]; \
        in1 = (in1 - in3) * mpeg3_tfcos12[2]; \
                        \
        in3 = in4 + in5;    \
        in4 -= in5;         \
                        \
        in2 = in0 + in1;    \
        in0 -= in1;

Referenced by mpeg3audio_dct12().

#define MACRO

(

v

)

Value:

{ \
        float tmpval; \
        tmpval = tmp[(v)] + tmp[17-(v)]; \
        out2[9+(v)] = tmpval * w[27+(v)]; \
        out2[8-(v)] = tmpval * w[26-(v)]; \
        tmpval = tmp[(v)] - tmp[17-(v)]; \
        ts[SBLIMIT*(8-(v))] = out1[8-(v)] + tmpval * w[8-(v)]; \
        ts[SBLIMIT*(9+(v))] = out1[9+(v)] + tmpval * w[9+(v)]; \
        }

Referenced by mpeg3audio_dct36().

---

Function Documentation

int mpeg3audio_dct12	(	float *	in,
		float *	rawout1,
		float *	rawout2,
		register float *	wi,
		register float *	ts
	)

Definition at line 512 of file dct.c.

References DCT12_PART1, DCT12_PART2, mpeg3_tfcos12, and SBLIMIT.

Referenced by hybrid().

int mpeg3audio_dct36	(	float *	inbuf,
		float *	o1,
		float *	o2,
		float *	wintab,
		float *	tsbuf
	)

Definition at line 360 of file dct.c.

References MACRO, mpeg3_cos18, mpeg3_COS6_1, mpeg3_COS6_2, mpeg3_cos9, mpeg3_tfcos36, t0, t1, t2, t3, t4, t5, t6, and t7.

Referenced by hybrid().

int mpeg3audio_dct64	(	float *	a,
		float *	b,
		float *	c
	)

Definition at line 322 of file dct.c.

References mpeg3audio_dct64_1().

Referenced by mpeg3audio_synth_stereo().

Here is the call graph for this function:

int mpeg3audio_dct64_1	(	float *	out0,
		float *	out1,
		float *	b1,
		float *	b2,
		float *	samples
	)

Definition at line 35 of file dct.c.

References costab, and mpeg3_pnts.

Referenced by mpeg3audio_dct64().