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Diffstat (limited to 'code/libspeex/modes.c')
| -rw-r--r-- | code/libspeex/modes.c | 362 |
1 files changed, 362 insertions, 0 deletions
diff --git a/code/libspeex/modes.c b/code/libspeex/modes.c new file mode 100644 index 0000000..33e031e --- /dev/null +++ b/code/libspeex/modes.c @@ -0,0 +1,362 @@ +/* Copyright (C) 2002-2006 Jean-Marc Valin + File: modes.c + + 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. + +*/ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include "modes.h" +#include "ltp.h" +#include "quant_lsp.h" +#include "cb_search.h" +#include "sb_celp.h" +#include "nb_celp.h" +#include "vbr.h" +#include "arch.h" +#include <math.h> + +#ifndef NULL +#define NULL 0 +#endif + + +/* Extern declarations for all codebooks we use here */ +extern const signed char gain_cdbk_nb[]; +extern const signed char gain_cdbk_lbr[]; +extern const signed char exc_5_256_table[]; +extern const signed char exc_5_64_table[]; +extern const signed char exc_8_128_table[]; +extern const signed char exc_10_32_table[]; +extern const signed char exc_10_16_table[]; +extern const signed char exc_20_32_table[]; + + +/* Parameters for Long-Term Prediction (LTP)*/ +static const ltp_params ltp_params_nb = { + gain_cdbk_nb, + 7, + 7 +}; + +/* Parameters for Long-Term Prediction (LTP)*/ +static const ltp_params ltp_params_vlbr = { + gain_cdbk_lbr, + 5, + 0 +}; + +/* Parameters for Long-Term Prediction (LTP)*/ +static const ltp_params ltp_params_lbr = { + gain_cdbk_lbr, + 5, + 7 +}; + +/* Parameters for Long-Term Prediction (LTP)*/ +static const ltp_params ltp_params_med = { + gain_cdbk_lbr, + 5, + 7 +}; + +/* Split-VQ innovation parameters for very low bit-rate narrowband */ +static const split_cb_params split_cb_nb_vlbr = { + 10, /*subvect_size*/ + 4, /*nb_subvect*/ + exc_10_16_table, /*shape_cb*/ + 4, /*shape_bits*/ + 0, +}; + +/* Split-VQ innovation parameters for very low bit-rate narrowband */ +static const split_cb_params split_cb_nb_ulbr = { + 20, /*subvect_size*/ + 2, /*nb_subvect*/ + exc_20_32_table, /*shape_cb*/ + 5, /*shape_bits*/ + 0, +}; + +/* Split-VQ innovation parameters for low bit-rate narrowband */ +static const split_cb_params split_cb_nb_lbr = { + 10, /*subvect_size*/ + 4, /*nb_subvect*/ + exc_10_32_table, /*shape_cb*/ + 5, /*shape_bits*/ + 0, +}; + + +/* Split-VQ innovation parameters narrowband */ +static const split_cb_params split_cb_nb = { + 5, /*subvect_size*/ + 8, /*nb_subvect*/ + exc_5_64_table, /*shape_cb*/ + 6, /*shape_bits*/ + 0, +}; + +/* Split-VQ innovation parameters narrowband */ +static const split_cb_params split_cb_nb_med = { + 8, /*subvect_size*/ + 5, /*nb_subvect*/ + exc_8_128_table, /*shape_cb*/ + 7, /*shape_bits*/ + 0, +}; + +/* Split-VQ innovation for low-band wideband */ +static const split_cb_params split_cb_sb = { + 5, /*subvect_size*/ + 8, /*nb_subvect*/ + exc_5_256_table, /*shape_cb*/ + 8, /*shape_bits*/ + 0, +}; + + + +/* 2150 bps "vocoder-like" mode for comfort noise */ +static const SpeexSubmode nb_submode1 = { + 0, + 1, + 0, + 0, + /* LSP quantization */ + lsp_quant_lbr, + lsp_unquant_lbr, + /* No pitch quantization */ + forced_pitch_quant, + forced_pitch_unquant, + NULL, + /* No innovation quantization (noise only) */ + noise_codebook_quant, + noise_codebook_unquant, + NULL, + -1, + 43 +}; + +/* 3.95 kbps very low bit-rate mode */ +static const SpeexSubmode nb_submode8 = { + 0, + 1, + 0, + 0, + /*LSP quantization*/ + lsp_quant_lbr, + lsp_unquant_lbr, + /*No pitch quantization*/ + forced_pitch_quant, + forced_pitch_unquant, + NULL, + /*Innovation quantization*/ + split_cb_search_shape_sign, + split_cb_shape_sign_unquant, + &split_cb_nb_ulbr, + QCONST16(.5,15), + 79 +}; + +/* 5.95 kbps very low bit-rate mode */ +static const SpeexSubmode nb_submode2 = { + 0, + 0, + 0, + 0, + /*LSP quantization*/ + lsp_quant_lbr, + lsp_unquant_lbr, + /*No pitch quantization*/ + pitch_search_3tap, + pitch_unquant_3tap, + <p_params_vlbr, + /*Innovation quantization*/ + split_cb_search_shape_sign, + split_cb_shape_sign_unquant, + &split_cb_nb_vlbr, + QCONST16(.6,15), + 119 +}; + +/* 8 kbps low bit-rate mode */ +static const SpeexSubmode nb_submode3 = { + -1, + 0, + 1, + 0, + /*LSP quantization*/ + lsp_quant_lbr, + lsp_unquant_lbr, + /*Pitch quantization*/ + pitch_search_3tap, + pitch_unquant_3tap, + <p_params_lbr, + /*Innovation quantization*/ + split_cb_search_shape_sign, + split_cb_shape_sign_unquant, + &split_cb_nb_lbr, + QCONST16(.55,15), + 160 +}; + +/* 11 kbps medium bit-rate mode */ +static const SpeexSubmode nb_submode4 = { + -1, + 0, + 1, + 0, + /*LSP quantization*/ + lsp_quant_lbr, + lsp_unquant_lbr, + /*Pitch quantization*/ + pitch_search_3tap, + pitch_unquant_3tap, + <p_params_med, + /*Innovation quantization*/ + split_cb_search_shape_sign, + split_cb_shape_sign_unquant, + &split_cb_nb_med, + QCONST16(.45,15), + 220 +}; + +/* 15 kbps high bit-rate mode */ +static const SpeexSubmode nb_submode5 = { + -1, + 0, + 3, + 0, + /*LSP quantization*/ + lsp_quant_nb, + lsp_unquant_nb, + /*Pitch quantization*/ + pitch_search_3tap, + pitch_unquant_3tap, + <p_params_nb, + /*Innovation quantization*/ + split_cb_search_shape_sign, + split_cb_shape_sign_unquant, + &split_cb_nb, + QCONST16(.3,15), + 300 +}; + +/* 18.2 high bit-rate mode */ +static const SpeexSubmode nb_submode6 = { + -1, + 0, + 3, + 0, + /*LSP quantization*/ + lsp_quant_nb, + lsp_unquant_nb, + /*Pitch quantization*/ + pitch_search_3tap, + pitch_unquant_3tap, + <p_params_nb, + /*Innovation quantization*/ + split_cb_search_shape_sign, + split_cb_shape_sign_unquant, + &split_cb_sb, + QCONST16(.2,15), + 364 +}; + +/* 24.6 kbps high bit-rate mode */ +static const SpeexSubmode nb_submode7 = { + -1, + 0, + 3, + 1, + /*LSP quantization*/ + lsp_quant_nb, + lsp_unquant_nb, + /*Pitch quantization*/ + pitch_search_3tap, + pitch_unquant_3tap, + <p_params_nb, + /*Innovation quantization*/ + split_cb_search_shape_sign, + split_cb_shape_sign_unquant, + &split_cb_nb, + QCONST16(.1,15), + 492 +}; + + +/* Default mode for narrowband */ +static const SpeexNBMode nb_mode = { + 160, /*frameSize*/ + 40, /*subframeSize*/ + 10, /*lpcSize*/ + 17, /*pitchStart*/ + 144, /*pitchEnd*/ +#ifdef FIXED_POINT + 29491, 19661, /* gamma1, gamma2 */ +#else + 0.9, 0.6, /* gamma1, gamma2 */ +#endif + QCONST16(.0002,15), /*lpc_floor*/ + {NULL, &nb_submode1, &nb_submode2, &nb_submode3, &nb_submode4, &nb_submode5, &nb_submode6, &nb_submode7, + &nb_submode8, NULL, NULL, NULL, NULL, NULL, NULL, NULL}, + 5, + {1, 8, 2, 3, 3, 4, 4, 5, 5, 6, 7} +}; + + +/* Default mode for narrowband */ +const SpeexMode speex_nb_mode = { + &nb_mode, + nb_mode_query, + "narrowband", + 0, + 4, + &nb_encoder_init, + &nb_encoder_destroy, + &nb_encode, + &nb_decoder_init, + &nb_decoder_destroy, + &nb_decode, + &nb_encoder_ctl, + &nb_decoder_ctl, +}; + + + +int speex_mode_query(const SpeexMode *mode, int request, void *ptr) +{ + return mode->query(mode->mode, request, ptr); +} + |