236 lines
9.7 KiB
C
236 lines
9.7 KiB
C
|
/***********************************************************************
|
||
|
|
Copyright (c) 2006-2011, Skype Limited. All rights reserved.
|
||
|
|
Redistribution and use in source and binary forms, with or without
|
||
|
|
modification, are permitted provided that the following conditions
|
||
|
|
are met:
|
||
|
|
- Redistributions of source code must retain the above copyright notice,
|
||
|
|
this list of conditions and the following disclaimer.
|
||
|
|
- Redistributions in binary form must reproduce the above copyright
|
||
|
|
notice, this list of conditions and the following disclaimer in the
|
||
|
|
documentation and/or other materials provided with the distribution.
|
||
|
|
- Neither the name of Internet Society, IETF or IETF Trust, nor the
|
||
|
|
names of specific contributors, may be used to endorse or promote
|
||
|
|
products derived from this software without specific prior written
|
||
|
|
permission.
|
||
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
||
|
|
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||
|
|
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||
|
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||
|
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||
|
|
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||
|
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||
|
|
POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
***********************************************************************/
|
||
|
|
|
||
|
|
#ifndef SILK_DEFINE_H
|
||
|
|
#define SILK_DEFINE_H
|
||
|
|
|
||
|
|
#include "errors.h"
|
||
|
|
#include "typedef.h"
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
extern "C"
|
||
|
|
{
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Max number of encoder channels (1/2) */
|
||
|
|
#define ENCODER_NUM_CHANNELS 2
|
||
|
|
/* Number of decoder channels (1/2) */
|
||
|
|
#define DECODER_NUM_CHANNELS 2
|
||
|
|
|
||
|
|
#define MAX_FRAMES_PER_PACKET 3
|
||
|
|
|
||
|
|
/* Limits on bitrate */
|
||
|
|
#define MIN_TARGET_RATE_BPS 5000
|
||
|
|
#define MAX_TARGET_RATE_BPS 80000
|
||
|
|
#define TARGET_RATE_TAB_SZ 8
|
||
|
|
|
||
|
|
/* LBRR thresholds */
|
||
|
|
#define LBRR_NB_MIN_RATE_BPS 12000
|
||
|
|
#define LBRR_MB_MIN_RATE_BPS 14000
|
||
|
|
#define LBRR_WB_MIN_RATE_BPS 16000
|
||
|
|
|
||
|
|
/* DTX settings */
|
||
|
|
#define NB_SPEECH_FRAMES_BEFORE_DTX 10 /* eq 200 ms */
|
||
|
|
#define MAX_CONSECUTIVE_DTX 20 /* eq 400 ms */
|
||
|
|
|
||
|
|
/* Maximum sampling frequency */
|
||
|
|
#define MAX_FS_KHZ 16
|
||
|
|
#define MAX_API_FS_KHZ 48
|
||
|
|
|
||
|
|
/* Signal types */
|
||
|
|
#define TYPE_NO_VOICE_ACTIVITY 0
|
||
|
|
#define TYPE_UNVOICED 1
|
||
|
|
#define TYPE_VOICED 2
|
||
|
|
|
||
|
|
/* Conditional coding types */
|
||
|
|
#define CODE_INDEPENDENTLY 0
|
||
|
|
#define CODE_INDEPENDENTLY_NO_LTP_SCALING 1
|
||
|
|
#define CODE_CONDITIONALLY 2
|
||
|
|
|
||
|
|
/* Settings for stereo processing */
|
||
|
|
#define STEREO_QUANT_TAB_SIZE 16
|
||
|
|
#define STEREO_QUANT_SUB_STEPS 5
|
||
|
|
#define STEREO_INTERP_LEN_MS 8 /* must be even */
|
||
|
|
#define STEREO_RATIO_SMOOTH_COEF 0.01 /* smoothing coef for signal norms and stereo width */
|
||
|
|
|
||
|
|
/* Range of pitch lag estimates */
|
||
|
|
#define PITCH_EST_MIN_LAG_MS 2 /* 2 ms -> 500 Hz */
|
||
|
|
#define PITCH_EST_MAX_LAG_MS 18 /* 18 ms -> 56 Hz */
|
||
|
|
|
||
|
|
/* Maximum number of subframes */
|
||
|
|
#define MAX_NB_SUBFR 4
|
||
|
|
|
||
|
|
/* Number of samples per frame */
|
||
|
|
#define LTP_MEM_LENGTH_MS 20
|
||
|
|
#define SUB_FRAME_LENGTH_MS 5
|
||
|
|
#define MAX_SUB_FRAME_LENGTH ( SUB_FRAME_LENGTH_MS * MAX_FS_KHZ )
|
||
|
|
#define MAX_FRAME_LENGTH_MS ( SUB_FRAME_LENGTH_MS * MAX_NB_SUBFR )
|
||
|
|
#define MAX_FRAME_LENGTH ( MAX_FRAME_LENGTH_MS * MAX_FS_KHZ )
|
||
|
|
|
||
|
|
/* Milliseconds of lookahead for pitch analysis */
|
||
|
|
#define LA_PITCH_MS 2
|
||
|
|
#define LA_PITCH_MAX ( LA_PITCH_MS * MAX_FS_KHZ )
|
||
|
|
|
||
|
|
/* Order of LPC used in find pitch */
|
||
|
|
#define MAX_FIND_PITCH_LPC_ORDER 16
|
||
|
|
|
||
|
|
/* Length of LPC window used in find pitch */
|
||
|
|
#define FIND_PITCH_LPC_WIN_MS ( 20 + (LA_PITCH_MS << 1) )
|
||
|
|
#define FIND_PITCH_LPC_WIN_MS_2_SF ( 10 + (LA_PITCH_MS << 1) )
|
||
|
|
#define FIND_PITCH_LPC_WIN_MAX ( FIND_PITCH_LPC_WIN_MS * MAX_FS_KHZ )
|
||
|
|
|
||
|
|
/* Milliseconds of lookahead for noise shape analysis */
|
||
|
|
#define LA_SHAPE_MS 5
|
||
|
|
#define LA_SHAPE_MAX ( LA_SHAPE_MS * MAX_FS_KHZ )
|
||
|
|
|
||
|
|
/* Maximum length of LPC window used in noise shape analysis */
|
||
|
|
#define SHAPE_LPC_WIN_MAX ( 15 * MAX_FS_KHZ )
|
||
|
|
|
||
|
|
/* dB level of lowest gain quantization level */
|
||
|
|
#define MIN_QGAIN_DB 2
|
||
|
|
/* dB level of highest gain quantization level */
|
||
|
|
#define MAX_QGAIN_DB 88
|
||
|
|
/* Number of gain quantization levels */
|
||
|
|
#define N_LEVELS_QGAIN 64
|
||
|
|
/* Max increase in gain quantization index */
|
||
|
|
#define MAX_DELTA_GAIN_QUANT 36
|
||
|
|
/* Max decrease in gain quantization index */
|
||
|
|
#define MIN_DELTA_GAIN_QUANT -4
|
||
|
|
|
||
|
|
/* Quantization offsets (multiples of 4) */
|
||
|
|
#define OFFSET_VL_Q10 32
|
||
|
|
#define OFFSET_VH_Q10 100
|
||
|
|
#define OFFSET_UVL_Q10 100
|
||
|
|
#define OFFSET_UVH_Q10 240
|
||
|
|
|
||
|
|
#define QUANT_LEVEL_ADJUST_Q10 80
|
||
|
|
|
||
|
|
/* Maximum numbers of iterations used to stabilize an LPC vector */
|
||
|
|
#define MAX_LPC_STABILIZE_ITERATIONS 16
|
||
|
|
#define MAX_PREDICTION_POWER_GAIN 1e4f
|
||
|
|
#define MAX_PREDICTION_POWER_GAIN_AFTER_RESET 1e2f
|
||
|
|
|
||
|
|
#define MAX_LPC_ORDER 16
|
||
|
|
#define MIN_LPC_ORDER 10
|
||
|
|
|
||
|
|
/* Find Pred Coef defines */
|
||
|
|
#define LTP_ORDER 5
|
||
|
|
|
||
|
|
/* LTP quantization settings */
|
||
|
|
#define NB_LTP_CBKS 3
|
||
|
|
|
||
|
|
/* Flag to use harmonic noise shaping */
|
||
|
|
#define USE_HARM_SHAPING 1
|
||
|
|
|
||
|
|
/* Max LPC order of noise shaping filters */
|
||
|
|
#define MAX_SHAPE_LPC_ORDER 16
|
||
|
|
|
||
|
|
#define HARM_SHAPE_FIR_TAPS 3
|
||
|
|
|
||
|
|
/* Maximum number of delayed decision states */
|
||
|
|
#define MAX_DEL_DEC_STATES 4
|
||
|
|
|
||
|
|
#define LTP_BUF_LENGTH 512
|
||
|
|
#define LTP_MASK ( LTP_BUF_LENGTH - 1 )
|
||
|
|
|
||
|
|
#define DECISION_DELAY 32
|
||
|
|
#define DECISION_DELAY_MASK ( DECISION_DELAY - 1 )
|
||
|
|
|
||
|
|
/* Number of subframes for excitation entropy coding */
|
||
|
|
#define SHELL_CODEC_FRAME_LENGTH 16
|
||
|
|
#define LOG2_SHELL_CODEC_FRAME_LENGTH 4
|
||
|
|
#define MAX_NB_SHELL_BLOCKS ( MAX_FRAME_LENGTH / SHELL_CODEC_FRAME_LENGTH )
|
||
|
|
|
||
|
|
/* Number of rate levels, for entropy coding of excitation */
|
||
|
|
#define N_RATE_LEVELS 10
|
||
|
|
|
||
|
|
/* Maximum sum of pulses per shell coding frame */
|
||
|
|
#define MAX_PULSES 16
|
||
|
|
|
||
|
|
#define MAX_MATRIX_SIZE MAX_LPC_ORDER /* Max of LPC Order and LTP order */
|
||
|
|
|
||
|
|
#if( MAX_LPC_ORDER > DECISION_DELAY )
|
||
|
|
# define NSQ_LPC_BUF_LENGTH MAX_LPC_ORDER
|
||
|
|
#else
|
||
|
|
# define NSQ_LPC_BUF_LENGTH DECISION_DELAY
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/***************************/
|
||
|
|
/* Voice activity detector */
|
||
|
|
/***************************/
|
||
|
|
#define VAD_N_BANDS 4
|
||
|
|
|
||
|
|
#define VAD_INTERNAL_SUBFRAMES_LOG2 2
|
||
|
|
#define VAD_INTERNAL_SUBFRAMES ( 1 << VAD_INTERNAL_SUBFRAMES_LOG2 )
|
||
|
|
|
||
|
|
#define VAD_NOISE_LEVEL_SMOOTH_COEF_Q16 1024 /* Must be < 4096 */
|
||
|
|
#define VAD_NOISE_LEVELS_BIAS 50
|
||
|
|
|
||
|
|
/* Sigmoid settings */
|
||
|
|
#define VAD_NEGATIVE_OFFSET_Q5 128 /* sigmoid is 0 at -128 */
|
||
|
|
#define VAD_SNR_FACTOR_Q16 45000
|
||
|
|
|
||
|
|
/* smoothing for SNR measurement */
|
||
|
|
#define VAD_SNR_SMOOTH_COEF_Q18 4096
|
||
|
|
|
||
|
|
/* Size of the piecewise linear cosine approximation table for the LSFs */
|
||
|
|
#define LSF_COS_TAB_SZ_FIX 128
|
||
|
|
|
||
|
|
/******************/
|
||
|
|
/* NLSF quantizer */
|
||
|
|
/******************/
|
||
|
|
#define NLSF_W_Q 2
|
||
|
|
#define NLSF_VQ_MAX_VECTORS 32
|
||
|
|
#define NLSF_VQ_MAX_SURVIVORS 32
|
||
|
|
#define NLSF_QUANT_MAX_AMPLITUDE 4
|
||
|
|
#define NLSF_QUANT_MAX_AMPLITUDE_EXT 10
|
||
|
|
#define NLSF_QUANT_LEVEL_ADJ 0.1
|
||
|
|
#define NLSF_QUANT_DEL_DEC_STATES_LOG2 2
|
||
|
|
#define NLSF_QUANT_DEL_DEC_STATES ( 1 << NLSF_QUANT_DEL_DEC_STATES_LOG2 )
|
||
|
|
|
||
|
|
/* Transition filtering for mode switching */
|
||
|
|
#define TRANSITION_TIME_MS 5120 /* 5120 = 64 * FRAME_LENGTH_MS * ( TRANSITION_INT_NUM - 1 ) = 64*(20*4)*/
|
||
|
|
#define TRANSITION_NB 3 /* Hardcoded in tables */
|
||
|
|
#define TRANSITION_NA 2 /* Hardcoded in tables */
|
||
|
|
#define TRANSITION_INT_NUM 5 /* Hardcoded in tables */
|
||
|
|
#define TRANSITION_FRAMES ( TRANSITION_TIME_MS / MAX_FRAME_LENGTH_MS )
|
||
|
|
#define TRANSITION_INT_STEPS ( TRANSITION_FRAMES / ( TRANSITION_INT_NUM - 1 ) )
|
||
|
|
|
||
|
|
/* BWE factors to apply after packet loss */
|
||
|
|
#define BWE_AFTER_LOSS_Q16 63570
|
||
|
|
|
||
|
|
/* Defines for CN generation */
|
||
|
|
#define CNG_BUF_MASK_MAX 255 /* 2^floor(log2(MAX_FRAME_LENGTH))-1 */
|
||
|
|
#define CNG_GAIN_SMTH_Q16 4634 /* 0.25^(1/4) */
|
||
|
|
#define CNG_NLSF_SMTH_Q16 16348 /* 0.25 */
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif
|