#include <inttypes.h>#include <string.h>#include "avcodec.h"#include "libavutil/avutil.h"#include "get_bits.h"#include "dsputil.h"#include "g729.h"#include "lsp.h"#include "celp_math.h"#include "celp_filters.h"#include "acelp_filters.h"#include "acelp_pitch_delay.h"#include "acelp_vectors.h"#include "g729data.h"#include "g729postfilter.h"Go to the source code of this file.
Data Structures | |
| struct | G729FormatDescription |
| struct | G729Context |
Defines | |
| #define | LSFQ_MIN 40 |
| minimum quantized LSF value (3.2.4) 0.005 in Q13 | |
| #define | LSFQ_MAX 25681 |
| maximum quantized LSF value (3.2.4) 3.135 in Q13 | |
| #define | LSFQ_DIFF_MIN 321 |
| minimum LSF distance (3.2.4) 0.0391 in Q13 | |
| #define | INTERPOL_LEN 11 |
| interpolation filter length | |
| #define | SHARP_MIN 3277 |
| minimum gain pitch value (3.8, Equation 47) 0.2 in (1.14) | |
| #define | SHARP_MAX 13017 |
| maximum gain pitch value (3.8, Equation 47) (EE) This does not comply with the specification. | |
| #define | MR_ENERGY 1018156 |
| MR_ENERGY (mean removed energy) = mean_energy + 10 * log10(2^26 * subframe_size) in (7.13). | |
| #define | DECISION_NOISE 0 |
| #define | DECISION_INTERMEDIATE 1 |
| #define | DECISION_VOICE 2 |
Enumerations | |
| enum | G729Formats { FORMAT_G729_8K = 0, FORMAT_G729D_6K4, FORMAT_COUNT } |
Functions | |
| static uint16_t | g729_prng (uint16_t value) |
| pseudo random number generator | |
| static int | get_parity (uint8_t value) |
| Get parity bit of bit 2. | |
| static void | lsf_decode (int16_t *lsfq, int16_t *past_quantizer_outputs[MA_NP+1], int16_t ma_predictor, int16_t vq_1st, int16_t vq_2nd_low, int16_t vq_2nd_high) |
| static void | lsf_restore_from_previous (int16_t *lsfq, int16_t *past_quantizer_outputs[MA_NP+1], int ma_predictor_prev) |
| Restores past LSP quantizer output using LSF from previous frame. | |
| static void | g729d_get_new_exc (int16_t *out, const int16_t *in, const int16_t *fc_cur, int dstate, int gain_code, int subframe_size) |
| Constructs new excitation signal and applies phase filter to it. | |
| static int | g729d_onset_decision (int past_onset, const int16_t *past_gain_code) |
| Makes decision about onset in current subframe. | |
| static int16_t | g729d_voice_decision (int onset, int prev_voice_decision, const int16_t *past_gain_pitch) |
| Makes decision about voice presence in current subframe. | |
| static int32_t | scalarproduct_int16_c (const int16_t *v1, const int16_t *v2, int order, int shift) |
| static av_cold int | decoder_init (AVCodecContext *avctx) |
| static int | decode_frame (AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt) |
Variables | |
| static const G729FormatDescription | format_g729_8k |
| static const G729FormatDescription | format_g729d_6k4 |
| AVCodec | ff_g729_decoder |
| #define DECISION_INTERMEDIATE 1 |
| #define DECISION_NOISE 0 |
| #define DECISION_VOICE 2 |
| #define INTERPOL_LEN 11 |
interpolation filter length
Definition at line 59 of file g729dec.c.
Referenced by decode_frame(), and decoder_init().
| #define LSFQ_DIFF_MIN 321 |
minimum LSF distance (3.2.4) 0.0391 in Q13
Definition at line 56 of file g729dec.c.
Referenced by ff_sipr_decode_frame_16k(), lsf_decode(), and lsf_decode_fp().
| #define LSFQ_MAX 25681 |
maximum quantized LSF value (3.2.4) 3.135 in Q13
Definition at line 50 of file g729dec.c.
Referenced by lsf_decode().
| #define LSFQ_MIN 40 |
minimum quantized LSF value (3.2.4) 0.005 in Q13
Definition at line 44 of file g729dec.c.
Referenced by lsf_decode().
| #define MR_ENERGY 1018156 |
MR_ENERGY (mean removed energy) = mean_energy + 10 * log10(2^26 * subframe_size) in (7.13).
Definition at line 79 of file g729dec.c.
Referenced by decode_frame().
| #define SHARP_MAX 13017 |
| #define SHARP_MIN 3277 |
minimum gain pitch value (3.8, Equation 47) 0.2 in (1.14)
Definition at line 65 of file g729dec.c.
Referenced by decode_frame().
| enum G729Formats |
| static int decode_frame | ( | AVCodecContext * | avctx, | |
| void * | data, | |||
| int * | got_frame_ptr, | |||
| AVPacket * | avpkt | |||
| ) | [static] |
< frame erasure detected during decoding
< parity check failed
< switched MA predictor of LSP quantizer
< first stage vector of quantizer
< second stage lower vector of quantizer (size in bits)
< second stage higher vector of quantizer (size in bits)
< adaptive codebook index
< fixed-codebook vector pulse signs
< fixed-codebook indexes
< gain codebook (first stage) index
< gain codebook (second stage) index
| static av_cold int decoder_init | ( | AVCodecContext * | avctx | ) | [static] |
| static uint16_t g729_prng | ( | uint16_t | value | ) | [inline, static] |
pseudo random number generator
Definition at line 177 of file g729dec.c.
Referenced by decode_frame().
| static void g729d_get_new_exc | ( | int16_t * | out, | |
| const int16_t * | in, | |||
| const int16_t * | fc_cur, | |||
| int | dstate, | |||
| int | gain_code, | |||
| int | subframe_size | |||
| ) | [static] |
Constructs new excitation signal and applies phase filter to it.
| out[out] | constructed speech signal | |
| in | original excitation signal | |
| fc_cur | (2.13) original fixed-codebook vector | |
| gain_code | (14.1) gain code | |
| subframe_size | length of the subframe |
Definition at line 265 of file g729dec.c.
Referenced by decode_frame().
| static int g729d_onset_decision | ( | int | past_onset, | |
| const int16_t * | past_gain_code | |||
| ) | [static] |
Makes decision about onset in current subframe.
| past_onset | decision result of previous subframe | |
| past_gain_code | gain code of current and previous subframe |
Definition at line 293 of file g729dec.c.
Referenced by decode_frame().
| static int16_t g729d_voice_decision | ( | int | onset, | |
| int | prev_voice_decision, | |||
| const int16_t * | past_gain_pitch | |||
| ) | [static] |
Makes decision about voice presence in current subframe.
| onset | onset level | |
| prev_voice_decision | voice decision result from previous subframe | |
| past_gain_pitch | pitch gain of current and previous subframes |
Definition at line 309 of file g729dec.c.
Referenced by decode_frame().
| static int get_parity | ( | uint8_t | value | ) | [inline, static] |
| static void lsf_restore_from_previous | ( | int16_t * | lsfq, | |
| int16_t * | past_quantizer_outputs[MA_NP+1], | |||
| int | ma_predictor_prev | |||
| ) | [static] |
Restores past LSP quantizer output using LSF from previous frame.
| lsfq | [in/out] (2.13) quantized LSF coefficients | |
| past_quantizer_outputs | [in/out] (2.13) quantizer outputs from previous frames | |
| ma_predictor_prev | MA predictor from previous frame | |
| lsfq_prev | (2.13) quantized LSF coefficients from previous frame |
Definition at line 240 of file g729dec.c.
Referenced by decode_frame().
Initial value:
{
.name = "g729",
.type = AVMEDIA_TYPE_AUDIO,
.id = CODEC_ID_G729,
.priv_data_size = sizeof(G729Context),
.init = decoder_init,
.decode = decode_frame,
.capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("G.729"),
}
const G729FormatDescription format_g729_8k [static] |
Initial value:
{
.ac_index_bits = {8,5},
.parity_bit = 1,
.gc_1st_index_bits = GC_1ST_IDX_BITS_8K,
.gc_2nd_index_bits = GC_2ND_IDX_BITS_8K,
.fc_signs_bits = 4,
.fc_indexes_bits = 13,
}
const G729FormatDescription format_g729d_6k4 [static] |
Initial value:
{
.ac_index_bits = {8,4},
.parity_bit = 0,
.gc_1st_index_bits = GC_1ST_IDX_BITS_6K4,
.gc_2nd_index_bits = GC_2ND_IDX_BITS_6K4,
.fc_signs_bits = 2,
.fc_indexes_bits = 9,
}
1.5.8