4ede311055
Audio notes (opus codec) A lot of different improvements and bug fixes Thanks to: https://github.com/DrKLO/Telegram/issues/293 https://github.com/DrKLO/Telegram/issues/256 FOSS configuration not ready yet I will move main dev branch to github in next couple commits
139 lines
5.3 KiB
C
139 lines
5.3 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.
|
|
***********************************************************************/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "structs.h"
|
|
#include "define.h"
|
|
#include "tables.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C"
|
|
{
|
|
#endif
|
|
|
|
/* Piece-wise linear mapping from bitrate in kbps to coding quality in dB SNR */
|
|
const opus_int32 silk_TargetRate_table_NB[ TARGET_RATE_TAB_SZ ] = {
|
|
0, 8000, 9400, 11500, 13500, 17500, 25000, MAX_TARGET_RATE_BPS
|
|
};
|
|
const opus_int32 silk_TargetRate_table_MB[ TARGET_RATE_TAB_SZ ] = {
|
|
0, 9000, 12000, 14500, 18500, 24500, 35500, MAX_TARGET_RATE_BPS
|
|
};
|
|
const opus_int32 silk_TargetRate_table_WB[ TARGET_RATE_TAB_SZ ] = {
|
|
0, 10500, 14000, 17000, 21500, 28500, 42000, MAX_TARGET_RATE_BPS
|
|
};
|
|
const opus_int16 silk_SNR_table_Q1[ TARGET_RATE_TAB_SZ ] = {
|
|
18, 29, 38, 40, 46, 52, 62, 84
|
|
};
|
|
|
|
/* Tables for stereo predictor coding */
|
|
const opus_int16 silk_stereo_pred_quant_Q13[ STEREO_QUANT_TAB_SIZE ] = {
|
|
-13732, -10050, -8266, -7526, -6500, -5000, -2950, -820,
|
|
820, 2950, 5000, 6500, 7526, 8266, 10050, 13732
|
|
};
|
|
const opus_uint8 silk_stereo_pred_joint_iCDF[ 25 ] = {
|
|
249, 247, 246, 245, 244,
|
|
234, 210, 202, 201, 200,
|
|
197, 174, 82, 59, 56,
|
|
55, 54, 46, 22, 12,
|
|
11, 10, 9, 7, 0
|
|
};
|
|
const opus_uint8 silk_stereo_only_code_mid_iCDF[ 2 ] = { 64, 0 };
|
|
|
|
/* Tables for LBRR flags */
|
|
static const opus_uint8 silk_LBRR_flags_2_iCDF[ 3 ] = { 203, 150, 0 };
|
|
static const opus_uint8 silk_LBRR_flags_3_iCDF[ 7 ] = { 215, 195, 166, 125, 110, 82, 0 };
|
|
const opus_uint8 * const silk_LBRR_flags_iCDF_ptr[ 2 ] = {
|
|
silk_LBRR_flags_2_iCDF,
|
|
silk_LBRR_flags_3_iCDF
|
|
};
|
|
|
|
/* Table for LSB coding */
|
|
const opus_uint8 silk_lsb_iCDF[ 2 ] = { 120, 0 };
|
|
|
|
/* Tables for LTPScale */
|
|
const opus_uint8 silk_LTPscale_iCDF[ 3 ] = { 128, 64, 0 };
|
|
|
|
/* Tables for signal type and offset coding */
|
|
const opus_uint8 silk_type_offset_VAD_iCDF[ 4 ] = {
|
|
232, 158, 10, 0
|
|
};
|
|
const opus_uint8 silk_type_offset_no_VAD_iCDF[ 2 ] = {
|
|
230, 0
|
|
};
|
|
|
|
/* Tables for NLSF interpolation factor */
|
|
const opus_uint8 silk_NLSF_interpolation_factor_iCDF[ 5 ] = { 243, 221, 192, 181, 0 };
|
|
|
|
/* Quantization offsets */
|
|
const opus_int16 silk_Quantization_Offsets_Q10[ 2 ][ 2 ] = {
|
|
{ OFFSET_UVL_Q10, OFFSET_UVH_Q10 }, { OFFSET_VL_Q10, OFFSET_VH_Q10 }
|
|
};
|
|
|
|
/* Table for LTPScale */
|
|
const opus_int16 silk_LTPScales_table_Q14[ 3 ] = { 15565, 12288, 8192 };
|
|
|
|
/* Uniform entropy tables */
|
|
const opus_uint8 silk_uniform3_iCDF[ 3 ] = { 171, 85, 0 };
|
|
const opus_uint8 silk_uniform4_iCDF[ 4 ] = { 192, 128, 64, 0 };
|
|
const opus_uint8 silk_uniform5_iCDF[ 5 ] = { 205, 154, 102, 51, 0 };
|
|
const opus_uint8 silk_uniform6_iCDF[ 6 ] = { 213, 171, 128, 85, 43, 0 };
|
|
const opus_uint8 silk_uniform8_iCDF[ 8 ] = { 224, 192, 160, 128, 96, 64, 32, 0 };
|
|
|
|
const opus_uint8 silk_NLSF_EXT_iCDF[ 7 ] = { 100, 40, 16, 7, 3, 1, 0 };
|
|
|
|
/* Elliptic/Cauer filters designed with 0.1 dB passband ripple,
|
|
80 dB minimum stopband attenuation, and
|
|
[0.95 : 0.15 : 0.35] normalized cut off frequencies. */
|
|
|
|
/* Interpolation points for filter coefficients used in the bandwidth transition smoother */
|
|
const opus_int32 silk_Transition_LP_B_Q28[ TRANSITION_INT_NUM ][ TRANSITION_NB ] =
|
|
{
|
|
{ 250767114, 501534038, 250767114 },
|
|
{ 209867381, 419732057, 209867381 },
|
|
{ 170987846, 341967853, 170987846 },
|
|
{ 131531482, 263046905, 131531482 },
|
|
{ 89306658, 178584282, 89306658 }
|
|
};
|
|
|
|
/* Interpolation points for filter coefficients used in the bandwidth transition smoother */
|
|
const opus_int32 silk_Transition_LP_A_Q28[ TRANSITION_INT_NUM ][ TRANSITION_NA ] =
|
|
{
|
|
{ 506393414, 239854379 },
|
|
{ 411067935, 169683996 },
|
|
{ 306733530, 116694253 },
|
|
{ 185807084, 77959395 },
|
|
{ 35497197, 57401098 }
|
|
};
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|