Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
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/* Copyright (C) 2002 Jean-Marc Valin */
/**
@file modes.h
@brief Describes the different modes of the codec
*/
/*
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 the Xiph.org Foundation nor the names of its
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 FOUNDATION 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 MODES_H
#define MODES_H
#include "speex.h"
#include "speex_bits.h"
#define NB_SUBMODES 16
#define NB_SUBMODE_BITS 4
#define SB_SUBMODES 8
#define SB_SUBMODE_BITS 3
/** Quantizes LSPs */
typedef void (*lsp_quant_func)(float *, float *, int, SpeexBits *);
/** Decodes quantized LSPs */
typedef void (*lsp_unquant_func)(float *, int, SpeexBits *);
/** Long-term predictor quantization */
typedef int (*ltp_quant_func)(float *, float *, float *, float *,
float *, float *, void *, int, int, float,
int, int, SpeexBits*, char *, float *, float *, int);
/** Long-term un-quantize */
typedef void (*ltp_unquant_func)(float *, int, int, float, void *, int, int *,
float *, SpeexBits*, char*, int, int, float);
/** Innovation quantization function */
typedef void (*innovation_quant_func)(float *, float *, float *, float *, void *, int, int,
float *, float *, SpeexBits *, char *, int);
/** Innovation unquantization function */
typedef void (*innovation_unquant_func)(float *, void *, int, SpeexBits*, char *);
/** Description of a Speex sub-mode (wither narrowband or wideband */
typedef struct SpeexSubmode {
int lbr_pitch; /**< Set to -1 for "normal" modes, otherwise encode pitch using a global pitch and allowing a +- lbr_pitch variation (for low not-rates)*/
int forced_pitch_gain; /**< Use the same (forced) pitch gain for all sub-frames */
int have_subframe_gain; /**< Number of bits to use as sub-frame innovation gain */
int double_codebook; /**< Apply innovation quantization twice for higher quality (and higher bit-rate)*/
/*LSP functions*/
lsp_quant_func lsp_quant; /**< LSP quantization function */
lsp_unquant_func lsp_unquant; /**< LSP unquantization function */
/*Lont-term predictor functions*/
ltp_quant_func ltp_quant; /**< Long-term predictor (pitch) quantizer */
ltp_unquant_func ltp_unquant; /**< Long-term predictor (pitch) un-quantizer */
void *ltp_params; /**< Pitch parameters (options) */
/*Quantization of innovation*/
innovation_quant_func innovation_quant; /**< Innovation quantization */
innovation_unquant_func innovation_unquant; /**< Innovation un-quantization */
void *innovation_params; /**< Innovation quantization parameters*/
/*Synthesis filter enhancement*/
float lpc_enh_k1; /**< Enhancer constant */
float lpc_enh_k2; /**< Enhancer constant */
float comb_gain; /**< Gain of enhancer comb filter */
int bits_per_frame; /**< Number of bits per frame after encoding*/
} SpeexSubmode;
/** Struct defining the encoding/decoding mode*/
typedef struct SpeexNBMode {
int frameSize; /**< Size of frames used for encoding */
int subframeSize; /**< Size of sub-frames used for encoding */
int lpcSize; /**< Order of LPC filter */
int bufSize; /**< Size of signal buffer to use in encoder */
int pitchStart; /**< Smallest pitch value allowed */
int pitchEnd; /**< Largest pitch value allowed */
float gamma1; /**< Perceptual filter parameter #1 */
float gamma2; /**< Perceptual filter parameter #2 */
float lag_factor; /**< Lag-windowing parameter */
float lpc_floor; /**< Noise floor for LPC analysis */
float preemph; /**< Pre-emphasis */
SpeexSubmode *submodes[NB_SUBMODES]; /**< Sub-mode data for the mode */
int defaultSubmode; /**< Default sub-mode to use when encoding */
int quality_map[11]; /**< Mode corresponding to each quality setting */
} SpeexNBMode;
/** Struct defining the encoding/decoding mode for SB-CELP (wideband) */
typedef struct SpeexSBMode {
SpeexMode *nb_mode; /**< Embedded narrowband mode */
int frameSize; /**< Size of frames used for encoding */
int subframeSize; /**< Size of sub-frames used for encoding */
int lpcSize; /**< Order of LPC filter */
int bufSize; /**< Signal buffer size in encoder */
float gamma1; /**< Perceptual filter parameter #1 */
float gamma2; /**< Perceptual filter parameter #1 */
float lag_factor; /**< Lag-windowing parameter */
float lpc_floor; /**< Noise floor for LPC analysis */
float preemph; /**< Pre-emphasis */
float folding_gain;
SpeexSubmode *submodes[SB_SUBMODES]; /**< Sub-mode data for the mode */
int defaultSubmode; /**< Default sub-mode to use when encoding */
int low_quality_map[11]; /**< Mode corresponding to each quality setting */
int quality_map[11]; /**< Mode corresponding to each quality setting */
float (*vbr_thresh)[11];
int nb_modes;
} SpeexSBMode;
#endif