FFmpeg
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#include <stdint.h>
Go to the source code of this file.
Data Structures | |
struct | ACELPVContext |
struct | AMRFixed |
Sparse representation for the algebraic codebook (fixed) vector. More... | |
Functions | |
void | ff_acelp_vectors_init (ACELPVContext *c) |
Initialize ACELPVContext. More... | |
void | ff_acelp_vectors_init_mips (ACELPVContext *c) |
void | ff_acelp_fc_pulse_per_track (int16_t *fc_v, const uint8_t *tab1, const uint8_t *tab2, int pulse_indexes, int pulse_signs, int pulse_count, int bits) |
Decode fixed-codebook vector (3.8 and D.5.8 of G.729, 5.7.1 of AMR). More... | |
void | ff_decode_10_pulses_35bits (const int16_t *fixed_index, AMRFixed *fixed_sparse, const uint8_t *gray_decode, int half_pulse_count, int bits) |
Decode the algebraic codebook index to pulse positions and signs and construct the algebraic codebook vector for MODE_12k2. More... | |
void | ff_acelp_weighted_vector_sum (int16_t *out, const int16_t *in_a, const int16_t *in_b, int16_t weight_coeff_a, int16_t weight_coeff_b, int16_t rounder, int shift, int length) |
weighted sum of two vectors with rounding. More... | |
void | ff_weighted_vector_sumf (float *out, const float *in_a, const float *in_b, float weight_coeff_a, float weight_coeff_b, int length) |
float implementation of weighted sum of two vectors. More... | |
void | ff_adaptive_gain_control (float *out, const float *in, float speech_energ, int size, float alpha, float *gain_mem) |
Adaptive gain control (as used in AMR postfiltering) More... | |
void | ff_scale_vector_to_given_sum_of_squares (float *out, const float *in, float sum_of_squares, const int n) |
Set the sum of squares of a signal by scaling. More... | |
void | ff_set_fixed_vector (float *out, const AMRFixed *in, float scale, int size) |
Add fixed vector to an array from a sparse representation. More... | |
void | ff_clear_fixed_vector (float *out, const AMRFixed *in, int size) |
Clear array values set by set_fixed_vector. More... | |
Variables | |
const uint8_t | ff_fc_4pulses_8bits_tracks_13 [16] |
Track|Pulse| Positions1 | 0 | 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 752 | 1 | 1, 6, 11, 16, 21, 26, 31, 36, 41, 46, 51, 56, 61, 66, 71, 763 | 2 | 2, 7, 12, 17, 22, 27, 32, 37, 42, 47, 52, 57, 62, 67, 72, 77More... | |
const uint8_t | ff_fc_4pulses_8bits_track_4 [32] |
Track|Pulse| Positions4 | 3 | 3, 8, 13, 18, 23, 28, 33, 38, 43, 48, 53, 58, 63, 68, 73, 78| | 4, 9, 14, 19, 24, 29, 34, 39, 44, 49, 54, 59, 64, 69, 74, 79More... | |
const uint8_t | ff_fc_2pulses_9bits_track1 [16] |
Track|Pulse| Positions1 | 0 | 1, 6, 11, 16, 21, 26, 31, 36| | 3, 8, 13, 18, 23, 28, 33, 38More... | |
const uint8_t | ff_fc_2pulses_9bits_track1_gray [16] |
const uint8_t | ff_fc_2pulses_9bits_track2_gray [32] |
Track|Pulse| Positions2 | 1 | 0, 7, 14, 20, 27, 34, 1, 21 | | 2, 9, 15, 22, 29, 35, 6, 26 | | 4,10, 17, 24, 30, 37, 11, 31| | 5,12, 19, 25, 32, 39, 16, 36More... | |
const float | ff_b60_sinc [61] |
b60 hamming windowed sinc function coefficients More... | |
const float | ff_pow_0_7 [10] |
Table of pow(0.7,n) More... | |
const float | ff_pow_0_75 [10] |
Table of pow(0.75,n) More... | |
const float | ff_pow_0_55 [10] |
Table of pow(0.55,n) More... | |
void ff_acelp_vectors_init | ( | ACELPVContext * | c | ) |
Initialize ACELPVContext.
Definition at line 268 of file acelp_vectors.c.
Referenced by amrnb_decode_init(), and amrwb_decode_init().
void ff_acelp_vectors_init_mips | ( | ACELPVContext * | c | ) |
Definition at line 97 of file acelp_vectors_mips.c.
Referenced by ff_acelp_vectors_init().
void ff_acelp_fc_pulse_per_track | ( | int16_t * | fc_v, |
const uint8_t * | tab1, | ||
const uint8_t * | tab2, | ||
int | pulse_indexes, | ||
int | pulse_signs, | ||
int | pulse_count, | ||
int | bits | ||
) |
Decode fixed-codebook vector (3.8 and D.5.8 of G.729, 5.7.1 of AMR).
[out] | fc_v | decoded fixed codebook vector (2.13) |
tab1 | table used for first pulse_count pulses | |
tab2 | table used for last pulse | |
pulse_indexes | fixed codebook indexes | |
pulse_signs | signs of the excitation pulses (0 bit value means negative sign) | |
bits | number of bits per one pulse index | |
pulse_count | number of pulses decoded using first table | |
bits | length of one pulse index in bits |
Used in G.729 @8k, G.729 @4.4k, G.729 @6.4k, AMR @7.95k, AMR @7.40k
Definition at line 128 of file acelp_vectors.c.
Referenced by decode_frame().
void ff_decode_10_pulses_35bits | ( | const int16_t * | fixed_index, |
AMRFixed * | fixed_sparse, | ||
const uint8_t * | gray_decode, | ||
int | half_pulse_count, | ||
int | bits | ||
) |
Decode the algebraic codebook index to pulse positions and signs and construct the algebraic codebook vector for MODE_12k2.
fixed_index | positions of the ten pulses |
fixed_sparse | pointer to the algebraic codebook vector |
gray_decode | gray decoding table |
half_pulse_count | number of couples of pulses |
bits | length of one pulse index in bits |
Definition at line 152 of file acelp_vectors.c.
Referenced by decode_fixed_sparse(), and ff_sipr_decode_frame_16k().
void ff_acelp_weighted_vector_sum | ( | int16_t * | out, |
const int16_t * | in_a, | ||
const int16_t * | in_b, | ||
int16_t | weight_coeff_a, | ||
int16_t | weight_coeff_b, | ||
int16_t | rounder, | ||
int | shift, | ||
int | length | ||
) |
weighted sum of two vectors with rounding.
[out] | out | result of addition |
in_a | first vector | |
in_b | second vector | |
weight_coeff_a | first vector weight coefficient | |
weight_coeff_a | second vector weight coefficient | |
rounder | this value will be added to the sum of the two vectors | |
shift | result will be shifted to right by this value | |
length | vectors length |
out[i] = (in_a[i]*weight_a + in_b[i]*weight_b + rounder) >> shift
Definition at line 173 of file acelp_vectors.c.
Referenced by decode_frame(), g723_1_decode_frame(), long_term_filter(), and lsp_interpolate().
void ff_weighted_vector_sumf | ( | float * | out, |
const float * | in_a, | ||
const float * | in_b, | ||
float | weight_coeff_a, | ||
float | weight_coeff_b, | ||
int | length | ||
) |
float implementation of weighted sum of two vectors.
[out] | out | result of addition |
in_a | first vector | |
in_b | second vector | |
weight_coeff_a | first vector weight coefficient | |
weight_coeff_a | second vector weight coefficient | |
length | vectors length |
Definition at line 193 of file acelp_vectors.c.
Referenced by decode_frame(), decode_lspf(), ff_acelp_vectors_init(), ff_sipr_decode_frame_16k(), interpolate_lpc(), interpolate_lsp(), and synth_block_fcb_acb().
void ff_adaptive_gain_control | ( | float * | out, |
const float * | in, | ||
float | speech_energ, | ||
int | size, | ||
float | alpha, | ||
float * | gain_mem | ||
) |
Adaptive gain control (as used in AMR postfiltering)
out | output buffer for filtered speech data |
in | the input speech buffer (may be the same as out) |
speech_energ | input energy |
size | the input buffer size |
alpha | exponential filter factor |
gain_mem | a pointer to the filter memory (single float of size) |
Definition at line 203 of file acelp_vectors.c.
Referenced by decode_frame(), and postfilter().
void ff_scale_vector_to_given_sum_of_squares | ( | float * | out, |
const float * | in, | ||
float | sum_of_squares, | ||
const int | n | ||
) |
Set the sum of squares of a signal by scaling.
out | output samples |
in | input samples |
sum_of_squares | new sum of squares |
n | number of samples |
TIA/EIA/IS-733 2.4.8.3-2/3/4/5, 2.4.8.6 3GPP TS 26.090 6.1 (6)
Definition at line 224 of file acelp_vectors.c.
Referenced by apply_gain_ctrl(), scaled_hb_excitation(), and synthesis().
Add fixed vector to an array from a sparse representation.
out | fixed vector with pitch sharpening |
in | sparse fixed vector |
scale | number to multiply the fixed vector by |
size | the output vector size |
Definition at line 235 of file acelp_vectors.c.
Referenced by amrnb_decode_frame(), ff_sipr_decode_frame_16k(), and synth_block_fcb_acb().
Clear array values set by set_fixed_vector.
out | fixed vector to be cleared |
in | sparse fixed vector |
size | the output vector size |
Definition at line 253 of file acelp_vectors.c.
Referenced by amrnb_decode_frame().
const uint8_t ff_fc_4pulses_8bits_tracks_13[16] |
Table contains only first the pulse indexes.
Used in G.729 @8k, G.729 @4.4k, AMR @7.95k, AMR @7.40k
Definition at line 74 of file acelp_vectors.c.
Referenced by decode_frame(), and ff_sipr_decode_frame_16k().
const uint8_t ff_fc_4pulses_8bits_track_4[32] |
Used in G.729 @8k, G.729 @4.4k, AMR @7.95k, AMR @7.40k
Definition at line 79 of file acelp_vectors.c.
Referenced by decode_frame().
const uint8_t ff_fc_2pulses_9bits_track1[16] |
Used in G.729 @6.4k (with gray coding), AMR @5.9k (without gray coding)
Definition at line 31 of file acelp_vectors.c.
const uint8_t ff_fc_2pulses_9bits_track1_gray[16] |
Definition at line 42 of file acelp_vectors.c.
Referenced by decode_frame().
const uint8_t ff_fc_2pulses_9bits_track2_gray[32] |
2 | 1 | 0, 5, 10, 15, 20, 25, 30, 35 | | 1, 6, 11, 16, 21, 26, 31, 36 | | 2, 7, 12, 17, 22, 27, 32, 37 | | 4, 9, 14, 19, 24, 29, 34, 39
Used in G.729 @6.4k (with gray coding)
Definition at line 54 of file acelp_vectors.c.
Referenced by decode_frame().
const float ff_b60_sinc[61] |
b60 hamming windowed sinc function coefficients
Definition at line 114 of file acelp_vectors.c.
Referenced by decode_frame(), and decode_pitch_vector().
const float ff_pow_0_7[10] |
Table of pow(0.7,n)
Definition at line 99 of file acelp_vectors.c.
Referenced by eval_ir(), and postfilter().
const float ff_pow_0_75[10] |
Table of pow(0.75,n)
Definition at line 104 of file acelp_vectors.c.
Referenced by postfilter(), and postfilter_5k0().
const float ff_pow_0_55[10] |
Table of pow(0.55,n)
Definition at line 109 of file acelp_vectors.c.
Referenced by eval_ir(), and postfilter().