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-/***********************************************************************
-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 SILK_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
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-19 23:39:39 +0000