FFmpeg
Macros | Typedefs | Functions
mpegaudio.h File Reference
#include <stdint.h>
#include "libavutil/internal.h"

Go to the source code of this file.

Macros

#define  USE_FLOATS   0
 
#define  MPA_FRAME_SIZE   1152
 
#define  MPA_MAX_CODED_FRAME_SIZE   1792
 
#define  MPA_MAX_CHANNELS   2
 
#define  SBLIMIT   32 /* number of subbands */
 
#define  MPA_STEREO   0
 
#define  MPA_JSTEREO   1
 
#define  MPA_DUAL   2
 
#define  MPA_MONO   3
 
#define  FRAC_BITS   23 /* fractional bits for sb_samples and dct */
 
#define  WFRAC_BITS   16 /* fractional bits for window */
 
#define  IMDCT_SCALAR   1.759
 
#define  FRAC_ONE   (1 << FRAC_BITS)
 
#define  FIX(a)   ((int)((a) * FRAC_ONE))
 
#define  INTFLOAT   int
 
#define  SUINTFLOAT   SUINT
 

Typedefs

typedef int32_t  MPA_INT
 
typedef int16_t  OUT_INT
 

Functions

 

Detailed Description

mpeg audio declarations for both encoder and decoder.

Definition in file mpegaudio.h.

Macro Definition Documentation

USE_FLOATS

#define USE_FLOATS   0

Definition at line 30 of file mpegaudio.h.

MPA_FRAME_SIZE

#define MPA_FRAME_SIZE   1152

Definition at line 37 of file mpegaudio.h.

MPA_MAX_CODED_FRAME_SIZE

#define MPA_MAX_CODED_FRAME_SIZE   1792

Definition at line 40 of file mpegaudio.h.

MPA_MAX_CHANNELS

#define MPA_MAX_CHANNELS   2

Definition at line 42 of file mpegaudio.h.

SBLIMIT

#define SBLIMIT   32 /* number of subbands */

Definition at line 44 of file mpegaudio.h.

MPA_STEREO

#define MPA_STEREO   0

Definition at line 46 of file mpegaudio.h.

MPA_JSTEREO

#define MPA_JSTEREO   1

Definition at line 47 of file mpegaudio.h.

MPA_DUAL

#define MPA_DUAL   2

Definition at line 48 of file mpegaudio.h.

MPA_MONO

#define MPA_MONO   3

Definition at line 49 of file mpegaudio.h.

FRAC_BITS

#define FRAC_BITS   23 /* fractional bits for sb_samples and dct */

Definition at line 52 of file mpegaudio.h.

WFRAC_BITS

#define WFRAC_BITS   16 /* fractional bits for window */

Definition at line 53 of file mpegaudio.h.

IMDCT_SCALAR

#define IMDCT_SCALAR   1.759

Definition at line 56 of file mpegaudio.h.

FRAC_ONE

#define FRAC_ONE   (1 << FRAC_BITS)

Definition at line 58 of file mpegaudio.h.

FIX

#define FIX (   a )    ((int)((a) * FRAC_ONE))

Definition at line 60 of file mpegaudio.h.

INTFLOAT

#define INTFLOAT   int

Definition at line 73 of file mpegaudio.h.

SUINTFLOAT

#define SUINTFLOAT   SUINT

Definition at line 74 of file mpegaudio.h.

Typedef Documentation

MPA_INT

typedef int32_t MPA_INT

Definition at line 75 of file mpegaudio.h.

OUT_INT

typedef int16_t OUT_INT

Definition at line 76 of file mpegaudio.h.

Function Documentation

ff_mpa_l2_select_table()

int ff_mpa_l2_select_table ( int  bitrate,
int  nb_channels,
int  freq,
int  lsf 
)

Definition at line 31 of file mpegaudio.c.

Referenced by mp_decode_layer2(), and MPA_encode_init().


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