1 /* Copyright (C) 2002-2006 Jean-Marc Valin */ 2 /** 3 @file modes.h 4 @brief Describes the different modes of the codec 5 */ 6 /* 7 Redistribution and use in source and binary forms, with or without 8 modification, are permitted provided that the following conditions 9 are met: 10 11 - Redistributions of source code must retain the above copyright 12 notice, this list of conditions and the following disclaimer. 13 14 - Redistributions in binary form must reproduce the above copyright 15 notice, this list of conditions and the following disclaimer in the 16 documentation and/or other materials provided with the distribution. 17 18 - Neither the name of the Xiph.org Foundation nor the names of its 19 contributors may be used to endorse or promote products derived from 20 this software without specific prior written permission. 21 22 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 24 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 25 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR 26 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 27 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 28 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 29 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 30 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 31 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 32 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 34 */ 35 36 #ifndef MODES_H 37 #define MODES_H 38 39 #include <speex/speex.h> 40 #include <speex/speex_bits.h> 41 #include "arch.h" 42 43 #define NB_SUBMODES 16 44 #define NB_SUBMODE_BITS 4 45 46 #define SB_SUBMODES 8 47 #define SB_SUBMODE_BITS 3 48 49 /* Used internally, NOT TO BE USED in applications */ 50 /** Used internally*/ 51 #define SPEEX_GET_PI_GAIN 100 52 /** Used internally*/ 53 #define SPEEX_GET_EXC 101 54 /** Used internally*/ 55 #define SPEEX_GET_INNOV 102 56 /** Used internally*/ 57 #define SPEEX_GET_DTX_STATUS 103 58 /** Used internally*/ 59 #define SPEEX_SET_INNOVATION_SAVE 104 60 /** Used internally*/ 61 #define SPEEX_SET_WIDEBAND 105 62 63 /** Used internally*/ 64 #define SPEEX_GET_STACK 106 65 66 67 /** Quantizes LSPs */ 68 typedef void (*lsp_quant_func)(spx_lsp_t *, spx_lsp_t *, int, SpeexBits *); 69 70 /** Decodes quantized LSPs */ 71 typedef void (*lsp_unquant_func)(spx_lsp_t *, int, SpeexBits *); 72 73 74 /** Long-term predictor quantization */ 75 typedef int (*ltp_quant_func)(spx_word16_t *, spx_word16_t *, spx_coef_t *, spx_coef_t *, 76 spx_coef_t *, spx_sig_t *, const void *, int, int, spx_word16_t, 77 int, int, SpeexBits*, char *, spx_word16_t *, spx_word16_t *, int, int, int, spx_word32_t *); 78 79 /** Long-term un-quantize */ 80 typedef void (*ltp_unquant_func)(spx_word16_t *, spx_word32_t *, int, int, spx_word16_t, const void *, int, int *, 81 spx_word16_t *, SpeexBits*, char*, int, int, spx_word16_t, int); 82 83 84 /** Innovation quantization function */ 85 typedef void (*innovation_quant_func)(spx_word16_t *, spx_coef_t *, spx_coef_t *, spx_coef_t *, const void *, int, int, 86 spx_sig_t *, spx_word16_t *, SpeexBits *, char *, int, int); 87 88 /** Innovation unquantization function */ 89 typedef void (*innovation_unquant_func)(spx_sig_t *, const void *, int, SpeexBits*, char *, spx_int32_t *); 90 91 /** Description of a Speex sub-mode (wither narrowband or wideband */ 92 typedef struct SpeexSubmode { 93 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)*/ 94 int forced_pitch_gain; /**< Use the same (forced) pitch gain for all sub-frames */ 95 int have_subframe_gain; /**< Number of bits to use as sub-frame innovation gain */ 96 int double_codebook; /**< Apply innovation quantization twice for higher quality (and higher bit-rate)*/ 97 /*LSP functions*/ 98 lsp_quant_func lsp_quant; /**< LSP quantization function */ 99 lsp_unquant_func lsp_unquant; /**< LSP unquantization function */ 100 101 /*Long-term predictor functions*/ 102 ltp_quant_func ltp_quant; /**< Long-term predictor (pitch) quantizer */ 103 ltp_unquant_func ltp_unquant; /**< Long-term predictor (pitch) un-quantizer */ 104 const void *ltp_params; /**< Pitch parameters (options) */ 105 106 /*Quantization of innovation*/ 107 innovation_quant_func innovation_quant; /**< Innovation quantization */ 108 innovation_unquant_func innovation_unquant; /**< Innovation un-quantization */ 109 const void *innovation_params; /**< Innovation quantization parameters*/ 110 111 spx_word16_t comb_gain; /**< Gain of enhancer comb filter */ 112 113 int bits_per_frame; /**< Number of bits per frame after encoding*/ 114 } SpeexSubmode; 115 116 /** Struct defining the encoding/decoding mode*/ 117 typedef struct SpeexNBMode { 118 int frameSize; /**< Size of frames used for encoding */ 119 int subframeSize; /**< Size of sub-frames used for encoding */ 120 int lpcSize; /**< Order of LPC filter */ 121 int pitchStart; /**< Smallest pitch value allowed */ 122 int pitchEnd; /**< Largest pitch value allowed */ 123 124 spx_word16_t gamma1; /**< Perceptual filter parameter #1 */ 125 spx_word16_t gamma2; /**< Perceptual filter parameter #2 */ 126 spx_word16_t lpc_floor; /**< Noise floor for LPC analysis */ 127 128 const SpeexSubmode *submodes[NB_SUBMODES]; /**< Sub-mode data for the mode */ 129 int defaultSubmode; /**< Default sub-mode to use when encoding */ 130 int quality_map[11]; /**< Mode corresponding to each quality setting */ 131 } SpeexNBMode; 132 133 134 /** Struct defining the encoding/decoding mode for SB-CELP (wideband) */ 135 typedef struct SpeexSBMode { 136 const SpeexMode *nb_mode; /**< Embedded narrowband mode */ 137 int frameSize; /**< Size of frames used for encoding */ 138 int subframeSize; /**< Size of sub-frames used for encoding */ 139 int lpcSize; /**< Order of LPC filter */ 140 spx_word16_t gamma1; /**< Perceptual filter parameter #1 */ 141 spx_word16_t gamma2; /**< Perceptual filter parameter #1 */ 142 spx_word16_t lpc_floor; /**< Noise floor for LPC analysis */ 143 spx_word16_t folding_gain; 144 145 const SpeexSubmode *submodes[SB_SUBMODES]; /**< Sub-mode data for the mode */ 146 int defaultSubmode; /**< Default sub-mode to use when encoding */ 147 int low_quality_map[11]; /**< Mode corresponding to each quality setting */ 148 int quality_map[11]; /**< Mode corresponding to each quality setting */ 149 #ifndef DISABLE_VBR 150 const float (*vbr_thresh)[11]; 151 #endif 152 int nb_modes; 153 } SpeexSBMode; 154 155 int speex_encode_native(void *state, spx_word16_t *in, SpeexBits *bits); 156 int speex_decode_native(void *state, SpeexBits *bits, spx_word16_t *out); 157 158 int nb_mode_query(const void *mode, int request, void *ptr); 159 int wb_mode_query(const void *mode, int request, void *ptr); 160 161 #endif 162
