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+/* Copyright (C) 2002-2006 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/speex.h>
+#include <speex/speex_bits.h>
+#include "arch.h"
+
+#define NB_SUBMODES 16
+#define NB_SUBMODE_BITS 4
+
+#define SB_SUBMODES 8
+#define SB_SUBMODE_BITS 3
+
+/* Used internally, NOT TO BE USED in applications */
+/** Used internally*/
+#define SPEEX_GET_PI_GAIN 100
+/** Used internally*/
+#define SPEEX_GET_EXC     101
+/** Used internally*/
+#define SPEEX_GET_INNOV   102
+/** Used internally*/
+#define SPEEX_GET_DTX_STATUS   103
+/** Used internally*/
+#define SPEEX_SET_INNOVATION_SAVE   104
+/** Used internally*/
+#define SPEEX_SET_WIDEBAND   105
+
+/** Used internally*/
+#define SPEEX_GET_STACK   106
+
+
+/** Quantizes LSPs */
+typedef void (*lsp_quant_func)(spx_lsp_t *, spx_lsp_t *, int, SpeexBits *);
+
+/** Decodes quantized LSPs */
+typedef void (*lsp_unquant_func)(spx_lsp_t *, int, SpeexBits *);
+
+
+/** Long-term predictor quantization */
+typedef int (*ltp_quant_func)(spx_word16_t *, spx_word16_t *, spx_coef_t *, spx_coef_t *, 
+                              spx_coef_t *, spx_sig_t *, const void *, int, int, spx_word16_t, 
+                              int, int, SpeexBits*, char *, spx_word16_t *, spx_word16_t *, int, int, int, spx_word32_t *);
+
+/** Long-term un-quantize */
+typedef void (*ltp_unquant_func)(spx_word16_t *, spx_word32_t *, int, int, spx_word16_t, const void *, int, int *,
+                                 spx_word16_t *, SpeexBits*, char*, int, int, spx_word16_t, int);
+
+
+/** Innovation quantization function */
+typedef void (*innovation_quant_func)(spx_word16_t *, spx_coef_t *, spx_coef_t *, spx_coef_t *, const void *, int, int, 
+                                      spx_sig_t *, spx_word16_t *, SpeexBits *, char *, int, int);
+
+/** Innovation unquantization function */
+typedef void (*innovation_unquant_func)(spx_sig_t *, const void *, int, SpeexBits*, char *, spx_int32_t *);
+
+/** 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 */
+
+   /*Long-term predictor functions*/
+   ltp_quant_func    ltp_quant; /**< Long-term predictor (pitch) quantizer */
+   ltp_unquant_func  ltp_unquant; /**< Long-term predictor (pitch) un-quantizer */
+   const void       *ltp_params; /**< Pitch parameters (options) */
+
+   /*Quantization of innovation*/
+   innovation_quant_func innovation_quant; /**< Innovation quantization */
+   innovation_unquant_func innovation_unquant; /**< Innovation un-quantization */
+   const void             *innovation_params; /**< Innovation quantization parameters*/
+
+   spx_word16_t      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     pitchStart;     /**< Smallest pitch value allowed */
+   int     pitchEnd;       /**< Largest pitch value allowed */
+
+   spx_word16_t gamma1;    /**< Perceptual filter parameter #1 */
+   spx_word16_t gamma2;    /**< Perceptual filter parameter #2 */
+   spx_word16_t   lpc_floor;      /**< Noise floor for LPC analysis */
+
+   const 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 {
+   const 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 */
+   spx_word16_t gamma1;   /**< Perceptual filter parameter #1 */
+   spx_word16_t gamma2;   /**< Perceptual filter parameter #1 */
+   spx_word16_t   lpc_floor;     /**< Noise floor for LPC analysis */
+   spx_word16_t   folding_gain;
+
+   const 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 */
+#ifndef DISABLE_VBR
+   const float (*vbr_thresh)[11];
+#endif
+   int     nb_modes;
+} SpeexSBMode;
+
+int speex_encode_native(void *state, spx_word16_t *in, SpeexBits *bits);
+int speex_decode_native(void *state, SpeexBits *bits, spx_word16_t *out);
+
+int nb_mode_query(const void *mode, int request, void *ptr);
+int wb_mode_query(const void *mode, int request, void *ptr);
+
+#endif