libavcodec/g723_1_data.h File Reference

G723.1 compatible decoder data tables. More...

Go to the source code of this file.

Data Structures

struct  G723_1_Subframe
 G723.1 unpacked data subframe. More...
struct  PPFParam
 Pitch postfilter parameters. More...
struct  HFParam
 Harmonic filter parameters. More...
struct  FCBParam
 Optimized fixed codebook excitation parameters. More...

Defines

#define SUBFRAMES   4
#define SUBFRAME_LEN   60
#define FRAME_LEN   (SUBFRAME_LEN << 2)
#define HALF_FRAME_LEN   (FRAME_LEN / 2)
#define LPC_FRAME   (HALF_FRAME_LEN + SUBFRAME_LEN)
#define LPC_ORDER   10
#define LSP_BANDS   3
#define LSP_CB_SIZE   256
#define PITCH_MIN   18
#define PITCH_MAX   (PITCH_MIN + 127)
#define PITCH_ORDER   5
#define GRID_SIZE   2
#define PULSE_MAX   6
#define GAIN_LEVELS   24
#define COS_TBL_SIZE   512

Enumerations

enum  FrameType {
  ActiveFrame, SIDFrame, UntransmittedFrame, FT_SHORT = 0,
  FT_MEDIUM, FT_LONG, FT_PPC
}
 G723.1 frame types. More...
enum  Rate { Rate6k3, Rate5k3 }

Variables

static const uint8_t frame_size [4] = {24, 20, 4, 1}
static const int16_t ppf_gain_weight [2] = {0x1800, 0x2000}
 Postfilter gain weighting factors scaled by 2^15.
static const int16_t dc_lsp [LPC_ORDER]
 LSP DC component.
static const int16_t cos_tab [COS_TBL_SIZE]
 Cosine table scaled by 2^14.
static const int16_t lsp_band0 [LSP_CB_SIZE][3]
 LSP VQ tables.
static const int16_t lsp_band1 [LSP_CB_SIZE][3]
static const int16_t lsp_band2 [LSP_CB_SIZE][4]
static const int32_t combinatorial_table [PULSE_MAX][SUBFRAME_LEN/GRID_SIZE]
 Used for the coding/decoding of the pulses positions for the MP-MLQ codebook.
static const int16_t pitch_contrib [340]
static const int8_t pulses [4] = {6, 5, 6, 5}
 Number of non-zero pulses in the MP-MLQ excitation.
static const int32_t max_pos [4] = {593775, 142506, 593775, 142506}
 Size of the MP-MLQ fixed excitation codebooks.
static const int16_t fixed_cb_gain [GAIN_LEVELS]
static const int16_t adaptive_cb_gain85 [85 *20]
static const int16_t adaptive_cb_gain170 [170 *20]
static const int16_t postfilter_tbl [2][LPC_ORDER]
 0.65^i (Zero part) and 0.75^i (Pole part) scaled by 2^15
static const int16_t hamming_window [LPC_FRAME]
 Hamming window coefficients scaled by 2^15.
static const int16_t binomial_window [LPC_ORDER]
 Binomial window coefficients scaled by 2^15.
static const int16_t bandwidth_expand [LPC_ORDER]
 0.994^i scaled by 2^15
static const int16_t percept_flt_tbl [2][LPC_ORDER]
 0.5^i scaled by 2^15


Detailed Description

G723.1 compatible decoder data tables.

Definition in file g723_1_data.h.


Define Documentation

#define COS_TBL_SIZE   512

Definition at line 42 of file g723_1_data.h.

#define FRAME_LEN   (SUBFRAME_LEN << 2)

#define GAIN_LEVELS   24

Definition at line 41 of file g723_1_data.h.

Referenced by unpack_bitstream().

#define GRID_SIZE   2

Definition at line 39 of file g723_1_data.h.

Referenced by gen_fcb_excitation().

#define HALF_FRAME_LEN   (FRAME_LEN / 2)

Definition at line 31 of file g723_1_data.h.

#define LPC_FRAME   (HALF_FRAME_LEN + SUBFRAME_LEN)

Definition at line 32 of file g723_1_data.h.

#define LPC_ORDER   10

#define LSP_BANDS   3

Definition at line 34 of file g723_1_data.h.

#define LSP_CB_SIZE   256

Definition at line 35 of file g723_1_data.h.

#define PITCH_MAX   (PITCH_MIN + 127)

#define PITCH_MIN   18

Definition at line 36 of file g723_1_data.h.

Referenced by ff_sipr_decode_frame_16k(), and unpack_bitstream().

#define PITCH_ORDER   5

Definition at line 38 of file g723_1_data.h.

Referenced by gen_acb_excitation(), and get_residual().

#define PULSE_MAX   6

Definition at line 40 of file g723_1_data.h.

Referenced by gen_fcb_excitation().

#define SUBFRAME_LEN   60

#define SUBFRAMES   4

Definition at line 28 of file g723_1_data.h.


Enumeration Type Documentation

enum FrameType

G723.1 frame types.

Enumerator:
ActiveFrame  Active speech.
SIDFrame  Silence Insertion Descriptor frame.
UntransmittedFrame 
FT_SHORT  Short frame (divided in n sub-blocks).
FT_MEDIUM  Medium frame (divided in m<n sub-blocks).
FT_LONG  Long frame (single sub-block + PPC).
FT_PPC  Periodic Peak Component (part of the long frame).

Definition at line 47 of file g723_1_data.h.

enum Rate

Enumerator:
Rate6k3 
Rate5k3 

Definition at line 55 of file g723_1_data.h.


Variable Documentation

const int16_t adaptive_cb_gain170[170 *20] [static]

Definition at line 831 of file g723_1_data.h.

Referenced by gen_acb_excitation().

const int16_t adaptive_cb_gain85[85 *20] [static]

Definition at line 615 of file g723_1_data.h.

Referenced by gen_acb_excitation().

const int16_t bandwidth_expand[LPC_ORDER] [static]

Initial value:

 {
    32571, 32376, 32182, 31989, 31797, 31606, 31416, 31228, 31040, 30854
}
0.994^i scaled by 2^15

Definition at line 1303 of file g723_1_data.h.

const int16_t binomial_window[LPC_ORDER] [static]

Initial value:

 {
    32749, 32695, 32604, 32477, 32315, 32118, 31887, 31622, 31324, 30995
}
Binomial window coefficients scaled by 2^15.

Definition at line 1296 of file g723_1_data.h.

const int32_t combinatorial_table[PULSE_MAX][SUBFRAME_LEN/GRID_SIZE] [static]

Used for the coding/decoding of the pulses positions for the MP-MLQ codebook.

Definition at line 509 of file g723_1_data.h.

Referenced by gen_fcb_excitation().

const int16_t cos_tab[COS_TBL_SIZE] [static]

Cosine table scaled by 2^14.

Definition at line 126 of file g723_1_data.h.

Referenced by eval_lpcenv_or_interp(), and lsp2lpc().

const int16_t dc_lsp[LPC_ORDER] [static]

Initial value:

 {
    0x0c3b,
    0x1271,
    0x1e0a,
    0x2a36,
    0x3630,
    0x406f,
    0x4d28,
    0x56f4,
    0x638c,
    0x6c46
}
LSP DC component.

Definition at line 110 of file g723_1_data.h.

Referenced by g723_1_decode_init(), and inverse_quant().

const int16_t fixed_cb_gain[GAIN_LEVELS] [static]

Initial value:

 {
      1,    2,    3,    4,    6,    9,   13,   18,
     26,   38,   55,   80,  115,  166,  240,  348,
    502,  726, 1050, 1517, 2193, 3170, 4582, 6623,
}

Definition at line 609 of file g723_1_data.h.

Referenced by g723_1_decode_frame(), and gen_fcb_excitation().

const uint8_t frame_size[4] = {24, 20, 4, 1} [static]

const int16_t hamming_window[LPC_FRAME] [static]

Initial value:

 {
     2621,  2631,  2659,  2705,  2770,  2853,  2955,  3074,  3212,  3367,
     3541,  3731,  3939,  4164,  4405,  4663,  4937,  5226,  5531,  5851,
     6186,  6534,  6897,  7273,  7661,  8062,  8475,  8899,  9334,  9780,
    10235, 10699, 11172, 11653, 12141, 12636, 13138, 13645, 14157, 14673,
    15193, 15716, 16242, 16769, 17298, 17827, 18356, 18884, 19411, 19935,
    20457, 20975, 21489, 21999, 22503, 23002, 23494, 23978, 24455, 24924,
    25384, 25834, 26274, 26704, 27122, 27529, 27924, 28306, 28675, 29031,
    29373, 29700, 30012, 30310, 30592, 30857, 31107, 31340, 31557, 31756,
    31938, 32102, 32249, 32377, 32488, 32580, 32654, 32710, 32747, 32766,
    32766, 32747, 32710, 32654, 32580, 32488, 32377, 32249, 32102, 31938,
    31756, 31557, 31340, 31107, 30857, 30592, 30310, 30012, 29700, 29373,
    29031, 28675, 28306, 27924, 27529, 27122, 26704, 26274, 25834, 25384,
    24924, 24455, 23978, 23494, 23002, 22503, 21999, 21489, 20975, 20457,
    19935, 19411, 18884, 18356, 17827, 17298, 16769, 16242, 15716, 15193,
    14673, 14157, 13645, 13138, 12636, 12141, 11653, 11172, 10699, 10235,
     9780, 9334,   8899,  8475,  8062,  7661,  7273,  6897,  6534,  6186,
     5851, 5531,   5226,  4937,  4663,  4405,  4164,  3939,  3731,  3541,
     3367, 3212,   3074,  2955,  2853,  2770,  2705,  2659,  2631,  2621
}
Hamming window coefficients scaled by 2^15.

Definition at line 1272 of file g723_1_data.h.

const int16_t lsp_band0[LSP_CB_SIZE][3] [static]

LSP VQ tables.

Definition at line 196 of file g723_1_data.h.

Referenced by inverse_quant().

const int16_t lsp_band1[LSP_CB_SIZE][3] [static]

Definition at line 285 of file g723_1_data.h.

Referenced by inverse_quant().

const int16_t lsp_band2[LSP_CB_SIZE][4] [static]

Definition at line 374 of file g723_1_data.h.

Referenced by inverse_quant().

const int32_t max_pos[4] = {593775, 142506, 593775, 142506} [static]

Size of the MP-MLQ fixed excitation codebooks.

Definition at line 607 of file g723_1_data.h.

Referenced by gen_fcb_excitation().

const int16_t percept_flt_tbl[2][LPC_ORDER] [static]

Initial value:

 {
    
    {29491, 26542, 23888, 21499, 19349, 17414, 15673, 14106, 12695, 11425},
    
    {16384,  8192,  4096,  2048,  1024,   512,   256,   128,    64,    32}
}
0.5^i scaled by 2^15

Definition at line 1310 of file g723_1_data.h.

const int16_t pitch_contrib[340] [static]

Definition at line 553 of file g723_1_data.h.

Referenced by gen_fcb_excitation().

const int16_t postfilter_tbl[2][LPC_ORDER] [static]

Initial value:

 {
    
    {21299, 13844,  8999,  5849, 3802, 2471, 1606, 1044,  679,  441},
    
    {24576, 18432, 13824, 10368, 7776, 5832, 4374, 3281, 2460, 1845}
}
0.65^i (Zero part) and 0.75^i (Pole part) scaled by 2^15

Definition at line 1262 of file g723_1_data.h.

Referenced by formant_postfilter().

const int16_t ppf_gain_weight[2] = {0x1800, 0x2000} [static]

Postfilter gain weighting factors scaled by 2^15.

Definition at line 105 of file g723_1_data.h.

Referenced by comp_ppf_gains().

const int8_t pulses[4] = {6, 5, 6, 5} [static]

Number of non-zero pulses in the MP-MLQ excitation.

Definition at line 602 of file g723_1_data.h.

Referenced by gen_fcb_excitation(), and synth_block_fcb_acb().


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