libavcodec/ra144.c File Reference

#include <stdint.h>
#include "avcodec.h"
#include "celp_filters.h"
#include "ra144.h"

Go to the source code of this file.

Functions

static void ff_add_wav (int16_t *dest, int n, int skip_first, int *m, const int16_t *s1, const int8_t *s2, const int8_t *s3)

void ff_copy_and_dup (int16_t *target, const int16_t *source, int offset)

Copy the last offset values of *source to *target.

int ff_eval_refl (int *refl, const int16_t *coefs, AVCodecContext *avctx)

Evaluate the reflection coefficients from the filter coefficients.

void ff_eval_coefs (int *coefs, const int *refl)

Evaluate the LPC filter coefficients from the reflection coefficients.

void ff_int_to_int16 (int16_t *out, const int *inp)

int ff_t_sqrt (unsigned int x)

Evaluate sqrt(x << 24).

unsigned int ff_rms (const int *data)

int ff_interp (RA144Context *ractx, int16_t *out, int a, int copyold, int energy)

unsigned int ff_rescale_rms (unsigned int rms, unsigned int energy)

int ff_irms (const int16_t *data)

inverse root mean square

void ff_subblock_synthesis (RA144Context *ractx, const uint16_t *lpc_coefs, int cba_idx, int cb1_idx, int cb2_idx, int gval, int gain)

Variables

const int16_t ff_gain_val_tab [256][3]

const uint8_t ff_gain_exp_tab [256]

const int8_t ff_cb1_vects [128][40]

const int8_t ff_cb2_vects [128][40]

const uint16_t ff_cb1_base [128]

const uint16_t ff_cb2_base [128]

const int16_t ff_energy_tab [32]

static const int16_t lpc_refl_cb1 [64]

static const int16_t lpc_refl_cb2 [32]

static const int16_t lpc_refl_cb3 [32]

static const int16_t lpc_refl_cb4 [16]

static const int16_t lpc_refl_cb5 [16]

static const int16_t lpc_refl_cb6 [8]

static const int16_t lpc_refl_cb7 [8]

static const int16_t lpc_refl_cb8 [8]

static const int16_t lpc_refl_cb9 [8]

static const int16_t lpc_refl_cb10 [4]

const int16_t *const ff_lpc_refl_cb [10]

Function Documentation

static void ff_add_wav	(	int16_t *	dest,
		int	n,
		int	skip_first,
		int *	m,
		const int16_t *	s1,
		const int8_t *	s2,
		const int8_t *	s3
	)			`[static]`

Definition at line 1506 of file ra144.c.

Referenced by ff_subblock_synthesis().

void ff_copy_and_dup	(	int16_t *	target,
		const int16_t *	source,
		int	offset
	)

Copy the last offset values of *source to *target.

If those values are not enough to fill the target buffer, fill it with another copy of those values.

Definition at line 1529 of file ra144.c.

Referenced by ff_subblock_synthesis(), and ra144_encode_subblock().

void ff_eval_coefs	(	int *	coefs,
		const int *	refl
	)

Evaluate the LPC filter coefficients from the reflection coefficients.

Does the inverse of the ff_eval_refl() function.

Definition at line 1585 of file ra144.c.

Referenced by ra144_decode_frame(), and ra144_encode_frame().

int ff_eval_refl	(	int *	refl,
		const int16_t *	coefs,
		AVCodecContext *	avctx
	)

Evaluate the reflection coefficients from the filter coefficients.

Returns:: 1 if one of the reflection coefficients is greater than 4095, 0 if not.

Definition at line 1544 of file ra144.c.

Referenced by ff_interp(), and ra144_encode_frame().

void ff_int_to_int16	(	int16_t *	out,
		const int *	inp
	)

Definition at line 1605 of file ra144.c.

Referenced by ff_interp(), ra144_decode_frame(), and ra144_encode_frame().

int ff_interp	(	RA144Context *	ractx,
		int16_t *	out,
		int	a,
		int	copyold,
		int	energy
	)

Definition at line 1649 of file ra144.c.

Referenced by ra144_decode_frame(), and ra144_encode_frame().

int ff_irms ( const int16_t * data )

inverse root mean square

Definition at line 1676 of file ra144.c.

Referenced by ff_subblock_synthesis(), and ra144_encode_subblock().

unsigned int ff_rescale_rms	(	unsigned int	rms,
		unsigned int	energy
	)

Definition at line 1670 of file ra144.c.

Referenced by ff_interp(), ra144_decode_frame(), and ra144_encode_frame().

unsigned int ff_rms ( const int * data )

Definition at line 1628 of file ra144.c.

Referenced by ff_interp(), ra144_decode_frame(), and ra144_encode_frame().

void ff_subblock_synthesis	(	RA144Context *	ractx,
		const uint16_t *	lpc_coefs,
		int	cba_idx,
		int	cb1_idx,
		int	cb2_idx,
		int	gval,
		int	gain
	)

Definition at line 1689 of file ra144.c.

Referenced by do_output_subblock(), and ra144_encode_subblock().

int ff_t_sqrt ( unsigned int x )

Evaluate sqrt(x << 24).

x must fit in 20 bits. This value is evaluated in an odd way to make the output identical to the binary decoder.

Definition at line 1617 of file ra144.c.

Referenced by ff_irms(), ff_rms(), ra144_decode_frame(), and ra144_encode_frame().

Variable Documentation

const uint16_t ff_cb1_base[128]

Initial value:

{
    19657, 18474, 18365, 17520, 21048, 18231, 18584, 16671,
    20363, 19069, 19409, 18430, 21844, 18753, 19613, 17411,
    20389, 21772, 20129, 21702, 20978, 20472, 19627, 19387,
    21477, 23134, 21841, 23919, 22089, 21519, 21134, 20852,
    19675, 17821, 19044, 17477, 19986, 16955, 18446, 16086,
    21138, 18899, 20952, 18929, 21452, 17833, 20104, 17159,
    19770, 20056, 20336, 20866, 19329, 18217, 18908, 18004,
    21556, 21948, 23079, 23889, 20922, 19544, 20984, 19781,
    19781, 20984, 19544, 20922, 23889, 23079, 21948, 21556,
    18004, 18908, 18217, 19329, 20866, 20336, 20056, 19770,
    17159, 20104, 17833, 21452, 18929, 20952, 18899, 21138,
    16086, 18446, 16955, 19986, 17477, 19044, 17821, 19675,
    20852, 21134, 21519, 22089, 23919, 21841, 23134, 21477,
    19387, 19627, 20472, 20978, 21702, 20129, 21772, 20389,
    17411, 19613, 18753, 21844, 18430, 19409, 19069, 20363,
    16671, 18584, 18231, 21048, 17520, 18365, 18474, 19657,
}

Definition at line 1401 of file ra144.c.

Referenced by ff_subblock_synthesis(), and ra144_encode_subblock().

const int8_t ff_cb1_vects[128][40]

Definition at line 113 of file ra144.c.

Referenced by ff_subblock_synthesis(), fixed_cb_search(), and ra144_encode_subblock().

const uint16_t ff_cb2_base[128]

Initial value:

{
    12174, 13380, 13879, 13832, 13170, 13227, 13204, 12053,
    12410, 13988, 14348, 14631, 13100, 13415, 13224, 12268,
    11982, 13825, 13499, 14210, 13877, 14788, 13811, 13109,
    11449, 13275, 12833, 13717, 12728, 13696, 12759, 12405,
    10230, 12185, 11628, 13161, 11762, 13458, 12312, 12818,
    10443, 12773, 12011, 14020, 11818, 13825, 12453, 13226,
    10446, 13162, 11881, 14300, 12859, 16288, 13490, 15053,
    10155, 12820, 11519, 13973, 12041, 15081, 12635, 14198,
    14198, 12635, 15081, 12041, 13973, 11519, 12820, 10155,
    15053, 13490, 16288, 12859, 14300, 11881, 13162, 10446,
    13226, 12453, 13825, 11818, 14020, 12011, 12773, 10443,
    12818, 12312, 13458, 11762, 13161, 11628, 12185, 10230,
    12405, 12759, 13696, 12728, 13717, 12833, 13275, 11449,
    13109, 13811, 14788, 13877, 14210, 13499, 13825, 11982,
    12268, 13224, 13415, 13100, 14631, 14348, 13988, 12410,
    12053, 13204, 13227, 13170, 13832, 13879, 13380, 12174,
}

Definition at line 1420 of file ra144.c.

Referenced by ff_subblock_synthesis(), and ra144_encode_subblock().

const int8_t ff_cb2_vects[128][40]

Definition at line 757 of file ra144.c.

Referenced by ff_subblock_synthesis(), fixed_cb_search(), and ra144_encode_subblock().

const int16_t ff_energy_tab[32]

Initial value:

{
        0,    16,    20,    25,    32,    41,    51,    65,
       81,   103,   129,   163,   205,   259,   326,   410,
      516,   650,   819,  1031,  1298,  1634,  2057,  2590,
     3261,  4105,  5168,  6507,  8192, 10313, 12983, 16345
}

Definition at line 1439 of file ra144.c.

Referenced by ra144_decode_frame(), and ra144_encode_frame().

const uint8_t ff_gain_exp_tab[256]

Initial value:

 {
   15, 15, 15, 15, 15, 16, 14, 15, 14, 14, 14, 14, 14, 14, 14, 14,
   14, 13, 14, 14, 13, 14, 13, 14, 13, 13, 13, 14, 13, 13, 14, 13,
   13, 13, 13, 13, 14, 13, 12, 12, 13, 13, 13, 12, 13, 13, 13, 13,
   13, 12, 13, 13, 12, 12, 13, 13, 13, 13, 14, 14, 13, 13, 13, 13,
   13, 13, 13, 12, 12, 12, 13, 13, 12, 12, 12, 13, 12, 12, 12, 12,
   12, 12, 12, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 12, 12,
   12, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13, 14, 13, 13, 13, 13,
   13, 13, 13, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 13, 13, 14,
   13, 12, 12, 11, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
   12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 12, 12, 11, 11, 11, 11,
   12, 12, 12, 12, 11, 11, 12, 12, 12, 12, 12, 13, 12, 12, 12, 13,
   12, 12, 13, 12, 12, 13, 13, 13, 13, 13, 13, 13, 13, 14, 14, 14,
   12, 12, 11, 11, 12, 12, 12, 12, 11, 12, 11, 12, 12, 12, 12, 12,
   13, 13, 12, 12, 13, 13, 13, 14, 12, 13, 13, 13, 13, 13, 13, 13,
   11, 10, 11, 10, 11, 11, 10, 10, 11, 11, 11, 11, 10,  9, 11, 10,
   12, 12, 11, 12, 12, 12, 12, 13, 11, 12, 12, 12, 13, 13, 12, 12
}

Definition at line 94 of file ra144.c.

Referenced by ff_add_wav(), and ra144_encode_subblock().

const int16_t ff_gain_val_tab[256][3]

Definition at line 27 of file ra144.c.

Referenced by ff_add_wav(), and ra144_encode_subblock().

const int16_t* const ff_lpc_refl_cb[10]

Initial value:

{
    lpc_refl_cb1, lpc_refl_cb2, lpc_refl_cb3, lpc_refl_cb4, lpc_refl_cb5,
    lpc_refl_cb6, lpc_refl_cb7, lpc_refl_cb8, lpc_refl_cb9, lpc_refl_cb10
}

Definition at line 1501 of file ra144.c.

Referenced by ra144_decode_frame(), and ra144_encode_frame().

const int16_t lpc_refl_cb1[64] [static]

Initial value:

{
    -4041, -4018, -3998, -3977, -3954, -3930, -3906, -3879,
    -3852, -3825, -3795, -3764, -3731, -3699, -3666, -3631,
    -3594, -3555, -3513, -3468, -3420, -3372, -3321, -3268,
    -3212, -3153, -3090, -3021, -2944, -2863, -2772, -2676,
    -2565, -2445, -2328, -2202, -2072, -1941, -1808, -1660,
    -1508, -1348, -1185,  -994,  -798,  -600,  -374,  -110,
      152,   447,   720,   982,  1229,  1456,  1682,  1916,
     2130,  2353,  2595,  2853,  3118,  3363,  3588,  3814
}

Definition at line 1446 of file ra144.c.

const int16_t lpc_refl_cb10[4] [static]

Initial value:

{
     -617,   190,   802,  1483
}

Definition at line 1497 of file ra144.c.

const int16_t lpc_refl_cb2[32] [static]

Initial value:

{
    -3091, -2386, -1871, -1425, -1021,  -649,  -316,   -20,
      267,   544,   810,  1065,  1305,  1534,  1756,  1970,
     2171,  2359,  2536,  2700,  2854,  2996,  3133,  3263,
     3386,  3499,  3603,  3701,  3789,  3870,  3947,  4020
}

Definition at line 1457 of file ra144.c.

const int16_t lpc_refl_cb3[32] [static]

Initial value:

{
    -3525, -3295, -3081, -2890, -2696, -2511, -2328, -2149,
    -1979, -1817, -1658, -1498, -1341, -1188, -1032,  -876,
     -721,  -561,  -394,  -228,   -54,   119,   296,   484,
      683,   895,  1123,  1373,  1651,  1965,  2360,  2854
}

Definition at line 1464 of file ra144.c.

const int16_t lpc_refl_cb4[16] [static]

Initial value:

{
    -1845, -1057,  -522,   -77,   301,   647,   975,  1285,
     1582,  1873,  2163,  2452,  2735,  3017,  3299,  3569
}

Definition at line 1471 of file ra144.c.

const int16_t lpc_refl_cb5[16] [static]

Initial value:

{
    -2691, -2187, -1788, -1435, -1118,  -837,  -571,  -316,
      -59,   201,   470,   759,  1077,  1457,  1908,  2495
}

Definition at line 1476 of file ra144.c.

const int16_t lpc_refl_cb6[8] [static]

Initial value:

{
    -1372,  -474,   133,   632,  1100,  1571,  2075,  2672
}

Definition at line 1481 of file ra144.c.

const int16_t lpc_refl_cb7[8] [static]

Initial value:

{
    -2389, -1787, -1231,  -717,  -239,   234,   770,  1474
}

Definition at line 1485 of file ra144.c.

const int16_t lpc_refl_cb8[8] [static]

Initial value:

{
    -1569,  -864,  -296,   200,   670,  1151,  1709,  2385
}

Definition at line 1489 of file ra144.c.

const int16_t lpc_refl_cb9[8] [static]

Initial value:

{
    -2200, -1608, -1062,  -569,  -120,   338,   863,  1621
}

Definition at line 1493 of file ra144.c.


Functions
static void	ff_add_wav (int16_t dest, int n, int skip_first, int m, const int16_t s1, const int8_t s2, const int8_t *s3)
void	ff_copy_and_dup (int16_t target, const int16_t source, int offset)
	Copy the last offset values of source to target.
int	ff_eval_refl (int refl, const int16_t coefs, AVCodecContext *avctx)
	Evaluate the reflection coefficients from the filter coefficients.
void	ff_eval_coefs (int coefs, const int refl)
	Evaluate the LPC filter coefficients from the reflection coefficients.
void	ff_int_to_int16 (int16_t out, const int inp)
int	ff_t_sqrt (unsigned int x)
	Evaluate sqrt(x << 24).
unsigned int	ff_rms (const int *data)
int	ff_interp (RA144Context ractx, int16_t out, int a, int copyold, int energy)
unsigned int	ff_rescale_rms (unsigned int rms, unsigned int energy)
int	ff_irms (const int16_t *data)
	inverse root mean square
void	ff_subblock_synthesis (RA144Context ractx, const uint16_t lpc_coefs, int cba_idx, int cb1_idx, int cb2_idx, int gval, int gain)
Variables
const int16_t	ff_gain_val_tab [256][3]
const uint8_t	ff_gain_exp_tab [256]
const int8_t	ff_cb1_vects [128][40]
const int8_t	ff_cb2_vects [128][40]
const uint16_t	ff_cb1_base [128]
const uint16_t	ff_cb2_base [128]
const int16_t	ff_energy_tab [32]
static const int16_t	lpc_refl_cb1 [64]
static const int16_t	lpc_refl_cb2 [32]
static const int16_t	lpc_refl_cb3 [32]
static const int16_t	lpc_refl_cb4 [16]
static const int16_t	lpc_refl_cb5 [16]
static const int16_t	lpc_refl_cb6 [8]
static const int16_t	lpc_refl_cb7 [8]
static const int16_t	lpc_refl_cb8 [8]
static const int16_t	lpc_refl_cb9 [8]
static const int16_t	lpc_refl_cb10 [4]
const int16_t *const	ff_lpc_refl_cb [10]