mpegaudio.h File Reference

mpeg audio declarations for both encoder and decoder. More...

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

Detailed Description

mpeg audio declarations for both encoder and decoder.

Definition in file mpegaudio.h.

Macro Definition Documentation

#define USE_FLOATS   0

Definition at line 30 of file mpegaudio.h.

#define MPA_FRAME_SIZE   1152

Definition at line 37 of file mpegaudio.h.

Referenced by MPA_encode_init().

#define MPA_MAX_CODED_FRAME_SIZE   1792

Definition at line 40 of file mpegaudio.h.

Referenced by MPA_encode_frame(), and twolame_encode_frame().

#define MPA_MAX_CHANNELS   2

Definition at line 42 of file mpegaudio.h.

Referenced by compute_bit_allocation(), mp_decode_layer1(), mp_decode_layer2(), MPA_encode_frame(), and qdm2_decode_init().

#define SBLIMIT   32 /* number of subbands */

Definition at line 44 of file mpegaudio.h.

Referenced by compute_antialias(), compute_bit_allocation(), compute_imdct(), compute_scale_factors(), imdct36(), mp_decode_layer1(), mp_decode_layer2(), MPA_encode_frame(), and qdm2_synthesis_filter().

#define MPA_STEREO   0

Definition at line 46 of file mpegaudio.h.

Referenced by encode_frame(), and mp3_write_xing().

#define MPA_JSTEREO   1

Definition at line 47 of file mpegaudio.h.

Referenced by mp_decode_layer1(), mp_decode_layer2(), and mp_decode_layer3().

#define MPA_DUAL   2

Definition at line 48 of file mpegaudio.h.

#define MPA_MONO   3

Definition at line 49 of file mpegaudio.h.

Referenced by avpriv_mpegaudio_decode_header(), encode_frame(), and mp3_write_xing().

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

Definition at line 52 of file mpegaudio.h.

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

Definition at line 53 of file mpegaudio.h.

#define IMDCT_SCALAR   1.759

Definition at line 56 of file mpegaudio.h.

Referenced by ff_init_mpadsp_tabs_TMPL().

#define FRAC_ONE   (1 << FRAC_BITS)

Definition at line 58 of file mpegaudio.h.

Referenced by decode_init_static().

#define FIX

(

a

)

((int)((a) * FRAC_ONE))

Definition at line 60 of file mpegaudio.h.

#define INTFLOAT   int

Definition at line 73 of file mpegaudio.h.

#define SUINTFLOAT   SUINT

Definition at line 74 of file mpegaudio.h.

Typedef Documentation

typedef int32_t MPA_INT

Definition at line 75 of file mpegaudio.h.

typedef int16_t OUT_INT

Definition at line 76 of file mpegaudio.h.

Function Documentation

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().