g726.c File Reference

#include <limits.h>
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "internal.h"
#include "get_bits.h"
#include "put_bits.h"

Go to the source code of this file.

Data Structures
struct	Float11
	G.726 11-bit float. More...
struct	G726Tables
struct	G726Context

Functions
static Float11 *	i2f (int i, Float11 *f)
static int16_t	mult (Float11 *f1, Float11 *f2)
static int	sgn (int value)
static uint8_t	quant (G726Context *c, int d)
	Paragraph 4.2.2 page 18: Adaptive quantizer. More...
static int16_t	inverse_quant (G726Context *c, int i)
	Paragraph 4.2.3 page 22: Inverse adaptive quantizer. More...
static int16_t	g726_decode (G726Context *c, int I)
static av_cold int	g726_reset (G726Context *c)

Variables
static const int	quant_tbl16 []
	16kbit/s 2 bits per sample More...
static const int16_t	iquant_tbl16 []
static const int16_t	W_tbl16 []
static const uint8_t	F_tbl16 []
static const int	quant_tbl24 []
	24kbit/s 3 bits per sample More...
static const int16_t	iquant_tbl24 []
static const int16_t	W_tbl24 []
static const uint8_t	F_tbl24 []
static const int	quant_tbl32 []
	32kbit/s 4 bits per sample More...
static const int16_t	iquant_tbl32 []
static const int16_t	W_tbl32 []
static const uint8_t	F_tbl32 []
static const int	quant_tbl40 []
	40kbit/s 5 bits per sample More...
static const int16_t	iquant_tbl40 []
static const int16_t	W_tbl40 []
static const uint8_t	F_tbl40 []
static const G726Tables	G726Tables_pool []

Function Documentation

static Float11* i2f ( int  i, Float11 *  f  )

inlinestatic

Definition at line 45 of file g726.c.

Referenced by g726_decode(), and ict_float().

static int16_t mult ( Float11 *  f1, Float11 *  f2  )

inlinestatic

Definition at line 55 of file g726.c.

Referenced by burn_frame16(), dcstr_read_header(), draw_htext16(), draw_vtext16(), encode_block(), encode_frame(), filter16_brng(), filter_frame(), g726_decode(), graticule16_green_column(), graticule16_green_row(), select_palette(), and wma_decode_block().

static int sgn ( int  value )

inlinestatic

Definition at line 65 of file g726.c.

Referenced by g726_decode().

static uint8_t quant ( G726Context *  c, int  d  )

inlinestatic

Paragraph 4.2.2 page 18: Adaptive quantizer.

Definition at line 157 of file g726.c.

static int16_t inverse_quant ( G726Context *  c, int  i  )

inlinestatic

Paragraph 4.2.3 page 22: Inverse adaptive quantizer.

Definition at line 183 of file g726.c.

Referenced by g726_decode().

static int16_t g726_decode ( G726Context *  c, int  I  )

static

Definition at line 193 of file g726.c.

static av_cold int g726_reset ( G726Context *  c )

static

Definition at line 275 of file g726.c.

Variable Documentation

const int quant_tbl16[]

static

Initial value:

=
           { 260, INT_MAX }

16kbit/s 2 bits per sample

Definition at line 101 of file g726.c.

const int16_t iquant_tbl16[]

static

Initial value:

=
           { 116, 365, 365, 116 }

Definition at line 103 of file g726.c.

const int16_t W_tbl16[]

static

Initial value:

=
           { -22, 439, 439, -22 }

Definition at line 105 of file g726.c.

const uint8_t F_tbl16[]

static

Initial value:

=
           { 0, 7, 7, 0 }

Definition at line 107 of file g726.c.

const int quant_tbl24[]

static

Initial value:

=
           {  7, 217, 330, INT_MAX }

24kbit/s 3 bits per sample

Definition at line 110 of file g726.c.

const int16_t iquant_tbl24[]

static

Initial value:

=
           { INT16_MIN, 135, 273, 373, 373, 273, 135, INT16_MIN }

Definition at line 112 of file g726.c.

const int16_t W_tbl24[]

static

Initial value:

=
           { -4,  30, 137, 582, 582, 137,  30, -4 }

Definition at line 114 of file g726.c.

const uint8_t F_tbl24[]

static

Initial value:

=
           { 0, 1, 2, 7, 7, 2, 1, 0 }

Definition at line 116 of file g726.c.

const int quant_tbl32[]

static

Initial value:

=
           { -125,  79, 177, 245, 299, 348, 399, INT_MAX }

32kbit/s 4 bits per sample

Definition at line 119 of file g726.c.

const int16_t iquant_tbl32[]

static

Initial value:

=
         { INT16_MIN,   4, 135, 213, 273, 323, 373, 425,
                 425, 373, 323, 273, 213, 135,   4, INT16_MIN }

Definition at line 121 of file g726.c.

const int16_t W_tbl32[]

static

Initial value:

=
           { -12,  18,  41,  64, 112, 198, 355, 1122,
            1122, 355, 198, 112,  64,  41,  18, -12}

Definition at line 124 of file g726.c.

const uint8_t F_tbl32[]

static

Initial value:

=
           { 0, 0, 0, 1, 1, 1, 3, 7, 7, 3, 1, 1, 1, 0, 0, 0 }

Definition at line 127 of file g726.c.

const int quant_tbl40[]

static

Initial value:

=
           { -122, -16,  67, 138, 197, 249, 297, 338,
              377, 412, 444, 474, 501, 527, 552, INT_MAX }

40kbit/s 5 bits per sample

Definition at line 130 of file g726.c.

const int16_t iquant_tbl40[]

static

Initial value:

=
         { INT16_MIN, -66,  28, 104, 169, 224, 274, 318,
                 358, 395, 429, 459, 488, 514, 539, 566,
                 566, 539, 514, 488, 459, 429, 395, 358,
                 318, 274, 224, 169, 104,  28, -66, INT16_MIN }

Definition at line 133 of file g726.c.

const int16_t W_tbl40[]

static

Initial value:

=
           {   14,  14,  24,  39,  40,  41,   58,  100,
              141, 179, 219, 280, 358, 440,  529,  696,
              696, 529, 440, 358, 280, 219,  179,  141,
              100,  58,  41,  40,  39,  24,   14,   14 }

Definition at line 138 of file g726.c.

const uint8_t F_tbl40[]

static

Initial value:

=
           { 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 3, 4, 5, 6, 6,
             6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 }

Definition at line 143 of file g726.c.

const G726Tables G726Tables_pool[]

static

Initial value:

=
           {{ quant_tbl16, iquant_tbl16, W_tbl16, F_tbl16 },
            { quant_tbl24, iquant_tbl24, W_tbl24, F_tbl24 },
            { quant_tbl32, iquant_tbl32, W_tbl32, F_tbl32 },
            { quant_tbl40, iquant_tbl40, W_tbl40, F_tbl40 }}

Definition at line 147 of file g726.c.