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nb_celp.c

NAME

SYNOPSIS

#include <math.h>
#include 'nb_celp.h'
#include 'lpc.h'
#include 'lsp.h'
#include 'ltp.h'
#include 'quant_lsp.h'
#include 'cb_search.h'
#include 'filters.h'
#include 'stack_alloc.h'
#include 'vq.h'
#include <speex/speex_bits.h>
#include 'vbr.h'
#include 'misc.h'
#include <speex/speex_callbacks.h>

Defines

#define M_PI 3.14159265358979323846

#define NULL 0

#define SUBMODE(x) st->submodes[st->submodeID]->x

#define NB_ENC_STACK (8000*sizeof(spx_sig_t))

#define NB_DEC_STACK (4000*sizeof(spx_sig_t))

#define LSP_MARGIN .002

#define LSP_DELTA1 .2

#define LSP_DELTA2 .05

#define EXTRA_BUFFER 0

#define sqr(x) ((x)*(x))

#define median3(a, b, c) ((a) < (b) ? ((b) < (c) ? (b) : ((a) < (c) ? (c) : (a))) : ((c) < (b) ? (b) : ((c) < (a) ? (c) : (a))))

Functions

void * nb_encoder_init (const SpeexMode *m)

void nb_encoder_destroy (void *state)

int nb_encode (void *state, void *vin, SpeexBits *bits)

void * nb_decoder_init (const SpeexMode *m)

void nb_decoder_destroy (void *state)

int nb_decode (void *state, SpeexBits *bits, void *vout)

int nb_encoder_ctl (void *state, int request, void *ptr)

int nb_decoder_ctl (void *state, int request, void *ptr)

Variables

const float exc_gain_quant_scal3_bound [7] = {0.112338, 0.236980, 0.369316, 0.492054, 0.637471, 0.828874, 1.132784}

const float exc_gain_quant_scal3 [8] = {0.061130, 0.163546, 0.310413, 0.428220, 0.555887, 0.719055, 0.938694, 1.326874}

const float exc_gain_quant_scal1_bound [1] = {0.87798}

const float exc_gain_quant_scal1 [2] = {0.70469, 1.05127}

const spx_word16_t attenuation [10] = {1., 0.961, 0.852, 0.698, 0.527, 0.368, 0.237, 0.141, 0.077, 0.039}

Define Documentation

#define EXTRA_BUFFER 0

#define LSP_DELTA1 .2

#define LSP_DELTA2 .05

#define LSP_MARGIN .002

#define M_PI 3.14159265358979323846

#define median3(a, b, c) ((a) < (b) ? ((b) < (c) ? (b) : ((a) < (c) ? (c) : (a))) : ((c) < (b) ? (b) : ((c) < (a) ? (c) : (a))))

#define NB_DEC_STACK (4000*sizeof(spx_sig_t))

#define NB_ENC_STACK (8000*sizeof(spx_sig_t))

#define NULL 0

#define sqr(x) ((x)*(x))

#define SUBMODE(x) st->submodes[st->submodeID]->x

Function Documentation

int nb_decode (void * state, SpeexBits * bits, void * out)

Decodes one frame

int nb_decoder_ctl (void * state, int request, void * ptr)

ioctl-like function for controlling a narrowband decoder

void nb_decoder_destroy (void * state)

De-allocates decoder state resources

void* nb_decoder_init (const SpeexMode * m)

Initializes decoder state

int nb_encode (void * state, void * in, SpeexBits * bits)

Encodes one frame

int nb_encoder_ctl (void * state, int request, void * ptr)

ioctl-like function for controlling a narrowband encoder

void nb_encoder_destroy (void * state)

De-allocates encoder state resources

void* nb_encoder_init (const SpeexMode * m)

Initializes encoder state

Variable Documentation

const spx_word16_t attenuation[10] = {1., 0.961, 0.852, 0.698, 0.527, 0.368, 0.237, 0.141, 0.077, 0.039}

const float exc_gain_quant_scal1[2] = {0.70469, 1.05127}

const float exc_gain_quant_scal1_bound[1] = {0.87798}

const float exc_gain_quant_scal3[8] = {0.061130, 0.163546, 0.310413, 0.428220, 0.555887, 0.719055, 0.938694, 1.326874}

const float exc_gain_quant_scal3_bound[7] = {0.112338, 0.236980, 0.369316, 0.492054, 0.637471, 0.828874, 1.132784}

Author

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