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146 lines
6.4 KiB
146 lines
6.4 KiB
/* Copyright (C) 2002 Jean-Marc Valin */ |
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/** |
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@file modes.h |
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@brief Describes the different modes of the codec |
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*/ |
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/* |
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Redistribution and use in source and binary forms, with or without |
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modification, are permitted provided that the following conditions |
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are met: |
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- Redistributions of source code must retain the above copyright |
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notice, this list of conditions and the following disclaimer. |
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- Redistributions in binary form must reproduce the above copyright |
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notice, this list of conditions and the following disclaimer in the |
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documentation and/or other materials provided with the distribution. |
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- Neither the name of the Xiph.org Foundation nor the names of its |
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contributors may be used to endorse or promote products derived from |
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this software without specific prior written permission. |
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR |
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#ifndef MODES_H |
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#define MODES_H |
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#include "speex.h" |
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#include "speex_bits.h" |
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#define NB_SUBMODES 16 |
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#define NB_SUBMODE_BITS 4 |
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#define SB_SUBMODES 8 |
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#define SB_SUBMODE_BITS 3 |
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/** Quantizes LSPs */ |
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typedef void (*lsp_quant_func)(float *, float *, int, SpeexBits *); |
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/** Decodes quantized LSPs */ |
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typedef void (*lsp_unquant_func)(float *, int, SpeexBits *); |
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/** Long-term predictor quantization */ |
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typedef int (*ltp_quant_func)(float *, float *, float *, float *, |
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float *, float *, void *, int, int, float, |
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int, int, SpeexBits*, char *, float *, float *, int); |
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/** Long-term un-quantize */ |
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typedef void (*ltp_unquant_func)(float *, int, int, float, void *, int, int *, |
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float *, SpeexBits*, char*, int, int, float); |
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/** Innovation quantization function */ |
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typedef void (*innovation_quant_func)(float *, float *, float *, float *, void *, int, int, |
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float *, float *, SpeexBits *, char *, int); |
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/** Innovation unquantization function */ |
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typedef void (*innovation_unquant_func)(float *, void *, int, SpeexBits*, char *); |
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/** Description of a Speex sub-mode (wither narrowband or wideband */ |
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typedef struct SpeexSubmode { |
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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)*/ |
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int forced_pitch_gain; /**< Use the same (forced) pitch gain for all sub-frames */ |
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int have_subframe_gain; /**< Number of bits to use as sub-frame innovation gain */ |
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int double_codebook; /**< Apply innovation quantization twice for higher quality (and higher bit-rate)*/ |
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/*LSP functions*/ |
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lsp_quant_func lsp_quant; /**< LSP quantization function */ |
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lsp_unquant_func lsp_unquant; /**< LSP unquantization function */ |
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/*Lont-term predictor functions*/ |
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ltp_quant_func ltp_quant; /**< Long-term predictor (pitch) quantizer */ |
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ltp_unquant_func ltp_unquant; /**< Long-term predictor (pitch) un-quantizer */ |
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void *ltp_params; /**< Pitch parameters (options) */ |
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/*Quantization of innovation*/ |
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innovation_quant_func innovation_quant; /**< Innovation quantization */ |
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innovation_unquant_func innovation_unquant; /**< Innovation un-quantization */ |
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void *innovation_params; /**< Innovation quantization parameters*/ |
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/*Synthesis filter enhancement*/ |
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float lpc_enh_k1; /**< Enhancer constant */ |
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float lpc_enh_k2; /**< Enhancer constant */ |
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float comb_gain; /**< Gain of enhancer comb filter */ |
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int bits_per_frame; /**< Number of bits per frame after encoding*/ |
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} SpeexSubmode; |
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/** Struct defining the encoding/decoding mode*/ |
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typedef struct SpeexNBMode { |
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int frameSize; /**< Size of frames used for encoding */ |
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int subframeSize; /**< Size of sub-frames used for encoding */ |
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int lpcSize; /**< Order of LPC filter */ |
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int bufSize; /**< Size of signal buffer to use in encoder */ |
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int pitchStart; /**< Smallest pitch value allowed */ |
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int pitchEnd; /**< Largest pitch value allowed */ |
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float gamma1; /**< Perceptual filter parameter #1 */ |
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float gamma2; /**< Perceptual filter parameter #2 */ |
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float lag_factor; /**< Lag-windowing parameter */ |
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float lpc_floor; /**< Noise floor for LPC analysis */ |
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float preemph; /**< Pre-emphasis */ |
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SpeexSubmode *submodes[NB_SUBMODES]; /**< Sub-mode data for the mode */ |
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int defaultSubmode; /**< Default sub-mode to use when encoding */ |
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int quality_map[11]; /**< Mode corresponding to each quality setting */ |
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} SpeexNBMode; |
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/** Struct defining the encoding/decoding mode for SB-CELP (wideband) */ |
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typedef struct SpeexSBMode { |
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SpeexMode *nb_mode; /**< Embedded narrowband mode */ |
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int frameSize; /**< Size of frames used for encoding */ |
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int subframeSize; /**< Size of sub-frames used for encoding */ |
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int lpcSize; /**< Order of LPC filter */ |
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int bufSize; /**< Signal buffer size in encoder */ |
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float gamma1; /**< Perceptual filter parameter #1 */ |
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float gamma2; /**< Perceptual filter parameter #1 */ |
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float lag_factor; /**< Lag-windowing parameter */ |
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float lpc_floor; /**< Noise floor for LPC analysis */ |
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float preemph; /**< Pre-emphasis */ |
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float folding_gain; |
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SpeexSubmode *submodes[SB_SUBMODES]; /**< Sub-mode data for the mode */ |
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int defaultSubmode; /**< Default sub-mode to use when encoding */ |
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int low_quality_map[11]; /**< Mode corresponding to each quality setting */ |
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int quality_map[11]; /**< Mode corresponding to each quality setting */ |
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float (*vbr_thresh)[11]; |
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int nb_modes; |
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} SpeexSBMode; |
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#endif
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