FFmpeg: libavcodec/mpegaudiotab.h File Reference

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mpegaudiotab.h File Reference

mpeg audio layer 2 tables. More...

#include <stdint.h>
#include "mpegaudio.h"

Go to the source code of this file.

Macros

#define SQRT2 1.41421356237309514547

Variables

static const int costab32 [30]

static const int bitinv32 [32]

static const unsigned short quant_snr [17]

static const float fixed_smr [SBLIMIT]

static const unsigned char nb_scale_factors [4] = { 3, 2, 1, 2 }

Detailed Description

mpeg audio layer 2 tables.

Most of them come from the mpeg audio specification.

Definition in file mpegaudiotab.h.

Macro Definition Documentation

#define SQRT2 1.41421356237309514547

Definition at line 36 of file mpegaudiotab.h.

Referenced by idct32().

Variable Documentation

const int costab32[30]

static

Definition at line 38 of file mpegaudiotab.h.

Referenced by idct32().

const int bitinv32[32]

static

Initial value:

= {

0, 16, 8, 24, 4, 20, 12, 28,

2, 18, 10, 26, 6, 22, 14, 30,

1, 17, 9, 25, 5, 21, 13, 29,

3, 19, 11, 27, 7, 23, 15, 31

}

Definition at line 74 of file mpegaudiotab.h.

Referenced by idct32().

const unsigned short quant_snr[17]

static

Initial value:

= {

70, 110, 160, 208,

253, 316, 378, 439,

499, 559, 620, 680,

740, 800, 861, 920,

980

}

Definition at line 85 of file mpegaudiotab.h.

Referenced by compute_bit_allocation().

const float fixed_smr[SBLIMIT]

static

Initial value:

= {

30, 17, 16, 10, 3, 12, 8, 2.5,

5, 5, 6, 6, 5, 6, 10, 6,

-4, -10, -21, -30, -42, -55, -68, -75,

-75, -75, -75, -75, -91, -107, -110, -108

}

Definition at line 95 of file mpegaudiotab.h.

Referenced by psycho_acoustic_model().

const unsigned char nb_scale_factors[4] = { 3, 2, 1, 2 }

static

Definition at line 102 of file mpegaudiotab.h.

Referenced by compute_bit_allocation().

Generated on Sun Mar 8 2015 02:35:22 for FFmpeg by doxygen 1.8.2