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#include <stdint.h>#include <string.h>#include "libavutil/common.h"#include "libavutil/intmath.h"#include "acelp_vectors.h"#include "celp_math.h"#include "g723_1.h"Go to the source code of this file.
Functions | |
| int | ff_g723_1_scale_vector (int16_t *dst, const int16_t *vector, int length) |
| Scale vector contents based on the largest of their absolutes. More... | |
| int | ff_g723_1_normalize_bits (int num, int width) |
| Calculate the number of left-shifts required for normalizing the input. More... | |
| int | ff_g723_1_dot_product (const int16_t *a, const int16_t *b, int length) |
| void | ff_g723_1_get_residual (int16_t *residual, int16_t *prev_excitation, int lag) |
| Get delayed contribution from the previous excitation vector. More... | |
| void | ff_g723_1_gen_dirac_train (int16_t *buf, int pitch_lag) |
| Generate a train of dirac functions with period as pitch lag. More... | |
| void | ff_g723_1_gen_acb_excitation (int16_t *vector, int16_t *prev_excitation, int pitch_lag, G723_1_Subframe *subfrm, enum Rate cur_rate) |
| Generate adaptive codebook excitation. More... | |
| static void | lsp2lpc (int16_t *lpc) |
| Convert LSP frequencies to LPC coefficients. More... | |
| void | ff_g723_1_lsp_interpolate (int16_t *lpc, int16_t *cur_lsp, int16_t *prev_lsp) |
| Quantize LSP frequencies by interpolation and convert them to the corresponding LPC coefficients. More... | |
| void | ff_g723_1_inverse_quant (int16_t *cur_lsp, int16_t *prev_lsp, uint8_t *lsp_index, int bad_frame) |
| Perform inverse quantization of LSP frequencies. More... | |
Variables | |
| const int16_t | ff_g723_1_cos_tab [COS_TBL_SIZE+1] |
| const int16_t | ff_g723_1_lsp_band0 [LSP_CB_SIZE][3] |
| LSP VQ tables. More... | |
| const int16_t | ff_g723_1_lsp_band1 [LSP_CB_SIZE][3] |
| const int16_t | ff_g723_1_lsp_band2 [LSP_CB_SIZE][4] |
| const int32_t | ff_g723_1_combinatorial_table [PULSE_MAX][SUBFRAME_LEN/GRID_SIZE] |
| Used for the coding/decoding of the pulses positions for the MP-MLQ codebook. More... | |
| const int16_t | ff_g723_1_fixed_cb_gain [GAIN_LEVELS] |
| const int16_t | ff_g723_1_adaptive_cb_gain85 [85 *20] |
| const int16_t | ff_g723_1_adaptive_cb_gain170 [170 *20] |
Scale vector contents based on the largest of their absolutes.
Definition at line 1104 of file g723_1.c.
Referenced by comp_autocorr(), comp_interp_index(), formant_postfilter(), and g723_1_encode_frame().
Calculate the number of left-shifts required for normalizing the input.
| num | input number |
| width | width of the input, 16 bits(0) / 32 bits(1) |
Definition at line 1121 of file g723_1.c.
Referenced by acb_search(), comp_autocorr(), comp_harmonic_coeff(), comp_ppf_coeff(), estimate_pitch(), gain_scale(), get_fcb_param(), lpc2lsp(), and lsp_quantize().
Definition at line 1126 of file g723_1.c.
Referenced by acb_search(), autocorr_max(), comp_interp_index(), comp_ppf_coeff(), formant_postfilter(), and get_fcb_param().
| void ff_g723_1_get_residual | ( | int16_t * | residual, |
| int16_t * | prev_excitation, | ||
| int | lag | ||
| ) |
Get delayed contribution from the previous excitation vector.
Definition at line 1132 of file g723_1.c.
Referenced by acb_search(), and ff_g723_1_gen_acb_excitation().
| void ff_g723_1_gen_dirac_train | ( | int16_t * | buf, |
| int | pitch_lag | ||
| ) |
Generate a train of dirac functions with period as pitch lag.
Definition at line 1146 of file g723_1.c.
Referenced by fcb_search(), gen_fcb_excitation(), and get_fcb_param().
| void ff_g723_1_gen_acb_excitation | ( | int16_t * | vector, |
| int16_t * | prev_excitation, | ||
| int | pitch_lag, | ||
| G723_1_Subframe * | subfrm, | ||
| enum Rate | cur_rate | ||
| ) |
Generate adaptive codebook excitation.
Definition at line 1158 of file g723_1.c.
Referenced by g723_1_decode_frame(), g723_1_encode_frame(), and generate_noise().
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static |
Convert LSP frequencies to LPC coefficients.
| lpc | buffer for LPC coefficients |
Definition at line 1190 of file g723_1.c.
Referenced by ff_g723_1_lsp_interpolate().
| void ff_g723_1_lsp_interpolate | ( | int16_t * | lpc, |
| int16_t * | cur_lsp, | ||
| int16_t * | prev_lsp | ||
| ) |
Quantize LSP frequencies by interpolation and convert them to the corresponding LPC coefficients.
| lpc | buffer for LPC coefficients |
| cur_lsp | the current LSP vector |
| prev_lsp | the previous LSP vector |
Definition at line 1252 of file g723_1.c.
Referenced by g723_1_decode_frame(), and g723_1_encode_frame().
| void ff_g723_1_inverse_quant | ( | int16_t * | cur_lsp, |
| int16_t * | prev_lsp, | ||
| uint8_t * | lsp_index, | ||
| int | bad_frame | ||
| ) |
Perform inverse quantization of LSP frequencies.
| cur_lsp | the current LSP vector |
| prev_lsp | the previous LSP vector |
| lsp_index | VQ indices |
| bad_frame | bad frame flag |
Definition at line 1273 of file g723_1.c.
Referenced by g723_1_decode_frame(), and g723_1_encode_frame().
| const int16_t ff_g723_1_cos_tab[COS_TBL_SIZE+1] |
| const int16_t ff_g723_1_lsp_band0[LSP_CB_SIZE][3] |
| const int16_t ff_g723_1_lsp_band1[LSP_CB_SIZE][3] |
Definition at line 190 of file g723_1.c.
Referenced by ff_g723_1_inverse_quant().
| const int16_t ff_g723_1_lsp_band2[LSP_CB_SIZE][4] |
Definition at line 279 of file g723_1.c.
Referenced by ff_g723_1_inverse_quant().
| const int32_t ff_g723_1_combinatorial_table[PULSE_MAX][SUBFRAME_LEN/GRID_SIZE] |
Used for the coding/decoding of the pulses positions for the MP-MLQ codebook.
Definition at line 410 of file g723_1.c.
Referenced by gen_fcb_excitation(), and pack_fcb_param().
| const int16_t ff_g723_1_fixed_cb_gain[GAIN_LEVELS] |
Definition at line 454 of file g723_1.c.
Referenced by g723_1_decode_frame(), gen_fcb_excitation(), and get_fcb_param().
| const int16_t ff_g723_1_adaptive_cb_gain85[85 *20] |
Definition at line 460 of file g723_1.c.
Referenced by acb_search(), and ff_g723_1_gen_acb_excitation().
| const int16_t ff_g723_1_adaptive_cb_gain170[170 *20] |
Definition at line 676 of file g723_1.c.
Referenced by acb_search(), and ff_g723_1_gen_acb_excitation().
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