1519 lines
46 KiB
C
1519 lines
46 KiB
C
/* Copyright (C) 2002 Jean-Marc Valin
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File: sb_celp.c
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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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <math.h>
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#include "sb_celp.h"
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#include "stdlib.h"
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#include "filters.h"
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#include "lpc.h"
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#include "lsp.h"
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#include "stack_alloc.h"
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#include "cb_search.h"
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#include "quant_lsp.h"
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#include "vq.h"
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#include "ltp.h"
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#include "misc.h"
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#ifdef DISABLE_WIDEBAND
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void *sb_encoder_init(const SpeexMode *m)
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{
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speex_error("Wideband and Ultra-wideband are disabled");
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return NULL;
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}
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void sb_encoder_destroy(void *state)
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{
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speex_error("Wideband and Ultra-wideband are disabled");
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}
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int sb_encode(void *state, void *vin, SpeexBits *bits)
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{
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speex_error("Wideband and Ultra-wideband are disabled");
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return -2;
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}
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void *sb_decoder_init(const SpeexMode *m)
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{
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speex_error("Wideband and Ultra-wideband are disabled");
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return NULL;
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}
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void sb_decoder_destroy(void *state)
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{
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speex_error("Wideband and Ultra-wideband are disabled");
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}
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int sb_decode(void *state, SpeexBits *bits, void *vout)
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{
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speex_error("Wideband and Ultra-wideband are disabled");
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return -2;
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}
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int sb_encoder_ctl(void *state, int request, void *ptr)
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{
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speex_error("Wideband and Ultra-wideband are disabled");
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return -2;
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}
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int sb_decoder_ctl(void *state, int request, void *ptr)
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{
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speex_error("Wideband and Ultra-wideband are disabled");
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return -2;
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}
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#else
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#ifndef M_PI
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#define M_PI 3.14159265358979323846 /* pi */
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#endif
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#define sqr(x) ((x)*(x))
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#define SUBMODE(x) st->submodes[st->submodeID]->x
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#ifdef FIXED_POINT
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static const spx_word16_t gc_quant_bound[16] = {125, 164, 215, 282, 370, 484, 635, 832, 1090, 1428, 1871, 2452, 3213, 4210, 5516, 7228};
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#define LSP_MARGIN 410
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#define LSP_DELTA1 6553
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#define LSP_DELTA2 1638
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#else
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#define LSP_MARGIN .05
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#define LSP_DELTA1 .2
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#define LSP_DELTA2 .05
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#endif
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#define QMF_ORDER 64
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#ifdef FIXED_POINT
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static const spx_word16_t h0[64] = {2, -7, -7, 18, 15, -39, -25, 75, 35, -130, -41, 212, 38, -327, -17, 483, -32, -689, 124, 956, -283, -1307, 543, 1780, -973, -2467, 1733, 3633, -3339, -6409, 9059, 30153, 30153, 9059, -6409, -3339, 3633, 1733, -2467, -973, 1780, 543, -1307, -283, 956, 124, -689, -32, 483, -17, -327, 38, 212, -41, -130, 35, 75, -25, -39, 15, 18, -7, -7, 2};
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static const spx_word16_t h1[64] = {2, 7, -7, -18, 15, 39, -25, -75, 35, 130, -41, -212, 38, 327, -17, -483, -32, 689, 124, -956, -283, 1307, 543, -1780, -973, 2467, 1733, -3633, -3339, 6409, 9059, -30153, 30153, -9059, -6409, 3339, 3633, -1733, -2467, 973, 1780, -543, -1307, 283, 956, -124, -689, 32, 483, 17, -327, -38, 212, 41, -130, -35, 75, 25, -39, -15, 18, 7, -7, -2};
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#else
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static const float h0[64] = {
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3.596189e-05, -0.0001123515,
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-0.0001104587, 0.0002790277,
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0.0002298438, -0.0005953563,
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-0.0003823631, 0.00113826,
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0.0005308539, -0.001986177,
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-0.0006243724, 0.003235877,
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0.0005743159, -0.004989147,
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-0.0002584767, 0.007367171,
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-0.0004857935, -0.01050689,
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0.001894714, 0.01459396,
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-0.004313674, -0.01994365,
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0.00828756, 0.02716055,
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-0.01485397, -0.03764973,
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0.026447, 0.05543245,
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-0.05095487, -0.09779096,
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0.1382363, 0.4600981,
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0.4600981, 0.1382363,
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-0.09779096, -0.05095487,
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0.05543245, 0.026447,
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-0.03764973, -0.01485397,
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0.02716055, 0.00828756,
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-0.01994365, -0.004313674,
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0.01459396, 0.001894714,
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-0.01050689, -0.0004857935,
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0.007367171, -0.0002584767,
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-0.004989147, 0.0005743159,
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0.003235877, -0.0006243724,
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-0.001986177, 0.0005308539,
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0.00113826, -0.0003823631,
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-0.0005953563, 0.0002298438,
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0.0002790277, -0.0001104587,
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-0.0001123515, 3.596189e-05
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};
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static const float h1[64] = {
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3.596189e-05, 0.0001123515,
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-0.0001104587, -0.0002790277,
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0.0002298438, 0.0005953563,
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-0.0003823631, -0.00113826,
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0.0005308539, 0.001986177,
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-0.0006243724, -0.003235877,
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0.0005743159, 0.004989147,
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-0.0002584767, -0.007367171,
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-0.0004857935, 0.01050689,
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0.001894714, -0.01459396,
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-0.004313674, 0.01994365,
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0.00828756, -0.02716055,
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-0.01485397, 0.03764973,
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0.026447, -0.05543245,
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-0.05095487, 0.09779096,
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0.1382363, -0.4600981,
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0.4600981, -0.1382363,
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-0.09779096, 0.05095487,
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0.05543245, -0.026447,
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-0.03764973, 0.01485397,
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0.02716055, -0.00828756,
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-0.01994365, 0.004313674,
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0.01459396, -0.001894714,
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-0.01050689, 0.0004857935,
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0.007367171, 0.0002584767,
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-0.004989147, -0.0005743159,
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0.003235877, 0.0006243724,
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-0.001986177, -0.0005308539,
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0.00113826, 0.0003823631,
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-0.0005953563, -0.0002298438,
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0.0002790277, 0.0001104587,
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-0.0001123515, -3.596189e-05
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};
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#endif
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static void mix_and_saturate(spx_word32_t *x0, spx_word32_t *x1, spx_word16_t *out, int len)
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{
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int i;
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for (i=0;i<len;i++)
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{
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spx_word32_t tmp;
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#ifdef FIXED_POINT
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tmp=PSHR(x0[i]-x1[i],SIG_SHIFT-1);
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#else
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tmp=2*(x0[i]-x1[i]);
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#endif
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if (tmp>32767)
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out[i] = 32767;
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else if (tmp<-32767)
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out[i] = -32767;
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else
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out[i] = tmp;
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}
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}
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void *sb_encoder_init(const SpeexMode *m)
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{
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int i;
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SBEncState *st;
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const SpeexSBMode *mode;
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#if defined(VAR_ARRAYS) || defined (USE_ALLOCA)
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st = (SBEncState*)speex_alloc(sizeof(SBEncState));
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st->stack = NULL;
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#else
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st = (SBEncState*)speex_alloc(sizeof(SBEncState)+10000*sizeof(spx_sig_t));
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st->stack = ((char*)st) + sizeof(SBEncState);
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#endif
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if (!st)
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return NULL;
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st->mode = m;
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mode = (const SpeexSBMode*)m->mode;
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st->st_low = speex_encoder_init(mode->nb_mode);
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st->full_frame_size = 2*mode->frameSize;
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st->frame_size = mode->frameSize;
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st->subframeSize = mode->subframeSize;
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st->nbSubframes = mode->frameSize/mode->subframeSize;
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st->windowSize = st->frame_size*3/2;
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st->lpcSize=mode->lpcSize;
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st->bufSize=mode->bufSize;
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st->encode_submode = 1;
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st->submodes=mode->submodes;
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st->submodeSelect = st->submodeID=mode->defaultSubmode;
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i=9;
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speex_encoder_ctl(st->st_low, SPEEX_SET_QUALITY, &i);
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st->lag_factor = mode->lag_factor;
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st->lpc_floor = mode->lpc_floor;
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st->gamma1=mode->gamma1;
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st->gamma2=mode->gamma2;
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st->first=1;
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st->x0d=speex_alloc((st->frame_size)*sizeof(spx_sig_t));
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st->x1d=speex_alloc((st->frame_size)*sizeof(spx_sig_t));
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st->high=speex_alloc((st->full_frame_size)*sizeof(spx_sig_t));
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st->y0=speex_alloc((st->full_frame_size)*sizeof(spx_sig_t));
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st->y1=speex_alloc((st->full_frame_size)*sizeof(spx_sig_t));
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st->h0_mem=speex_alloc((QMF_ORDER)*sizeof(spx_word16_t));
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st->h1_mem=speex_alloc((QMF_ORDER)*sizeof(spx_word16_t));
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st->g0_mem=speex_alloc((QMF_ORDER)*sizeof(spx_word32_t));
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st->g1_mem=speex_alloc((QMF_ORDER)*sizeof(spx_word32_t));
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st->buf=speex_alloc((st->windowSize)*sizeof(spx_sig_t));
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st->excBuf=speex_alloc((st->bufSize)*sizeof(spx_sig_t));
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st->exc = st->excBuf + st->bufSize - st->windowSize;
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st->res=speex_alloc((st->frame_size)*sizeof(spx_sig_t));
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st->sw=speex_alloc((st->frame_size)*sizeof(spx_sig_t));
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st->target=speex_alloc((st->frame_size)*sizeof(spx_sig_t));
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/*Asymmetric "pseudo-Hamming" window*/
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{
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int part1, part2;
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part1 = st->subframeSize*7/2;
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part2 = st->subframeSize*5/2;
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st->window = speex_alloc((st->windowSize)*sizeof(spx_word16_t));
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for (i=0;i<part1;i++)
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st->window[i]=(spx_word16_t)(SIG_SCALING*(.54-.46*cos(M_PI*i/part1)));
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for (i=0;i<part2;i++)
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st->window[part1+i]=(spx_word16_t)(SIG_SCALING*(.54+.46*cos(M_PI*i/part2)));
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}
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st->lagWindow = speex_alloc((st->lpcSize+1)*sizeof(spx_word16_t));
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for (i=0;i<st->lpcSize+1;i++)
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st->lagWindow[i]=16384*exp(-.5*sqr(2*M_PI*st->lag_factor*i));
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st->autocorr = speex_alloc((st->lpcSize+1)*sizeof(spx_word16_t));
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st->lpc = speex_alloc((st->lpcSize+1)*sizeof(spx_coef_t));
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st->bw_lpc1 = speex_alloc((st->lpcSize+1)*sizeof(spx_coef_t));
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st->bw_lpc2 = speex_alloc((st->lpcSize+1)*sizeof(spx_coef_t));
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st->lsp = speex_alloc((st->lpcSize)*sizeof(spx_lsp_t));
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st->qlsp = speex_alloc((st->lpcSize)*sizeof(spx_lsp_t));
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st->old_lsp = speex_alloc((st->lpcSize)*sizeof(spx_lsp_t));
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st->old_qlsp = speex_alloc((st->lpcSize)*sizeof(spx_lsp_t));
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st->interp_lsp = speex_alloc((st->lpcSize)*sizeof(spx_lsp_t));
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st->interp_qlsp = speex_alloc((st->lpcSize)*sizeof(spx_lsp_t));
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st->interp_lpc = speex_alloc((st->lpcSize+1)*sizeof(spx_coef_t));
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st->interp_qlpc = speex_alloc((st->lpcSize+1)*sizeof(spx_coef_t));
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st->pi_gain = speex_alloc((st->nbSubframes)*sizeof(spx_word32_t));
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st->mem_sp = speex_alloc((st->lpcSize)*sizeof(spx_mem_t));
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st->mem_sp2 = speex_alloc((st->lpcSize)*sizeof(spx_mem_t));
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st->mem_sw = speex_alloc((st->lpcSize)*sizeof(spx_mem_t));
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st->vbr_quality = 8;
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st->vbr_enabled = 0;
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st->vad_enabled = 0;
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st->abr_enabled = 0;
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st->relative_quality=0;
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st->complexity=2;
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speex_encoder_ctl(st->st_low, SPEEX_GET_SAMPLING_RATE, &st->sampling_rate);
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st->sampling_rate*=2;
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#ifdef ENABLE_VALGRIND
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VALGRIND_MAKE_READABLE(st, (st->stack-(char*)st));
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#endif
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return st;
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}
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void sb_encoder_destroy(void *state)
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{
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SBEncState *st=(SBEncState*)state;
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speex_encoder_destroy(st->st_low);
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speex_free(st);
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}
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int sb_encode(void *state, void *vin, SpeexBits *bits)
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{
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SBEncState *st;
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int i, roots, sub;
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char *stack;
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VARDECL(spx_mem_t *mem);
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VARDECL(spx_sig_t *innov);
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VARDECL(spx_word16_t *syn_resp);
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VARDECL(spx_word32_t *low_pi_gain);
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VARDECL(spx_sig_t *low_exc);
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VARDECL(spx_sig_t *low_innov);
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const SpeexSBMode *mode;
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int dtx;
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spx_word16_t *in = vin;
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st = (SBEncState*)state;
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stack=st->stack;
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mode = (const SpeexSBMode*)(st->mode->mode);
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{
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VARDECL(spx_word16_t *low);
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ALLOC(low, st->frame_size, spx_word16_t);
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/* Compute the two sub-bands by filtering with h0 and h1*/
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qmf_decomp(in, h0, st->x0d, st->x1d, st->full_frame_size, QMF_ORDER, st->h0_mem, stack);
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for (i=0;i<st->frame_size;i++)
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low[i] = SATURATE(PSHR(st->x0d[i],SIG_SHIFT),32767);
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/* Encode the narrowband part*/
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speex_encode_native(st->st_low, low, bits);
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for (i=0;i<st->frame_size;i++)
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st->x0d[i] = SHL(low[i],SIG_SHIFT);
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}
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/* High-band buffering / sync with low band */
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for (i=0;i<st->windowSize-st->frame_size;i++)
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st->high[i] = st->high[st->frame_size+i];
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for (i=0;i<st->frame_size;i++)
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st->high[st->windowSize-st->frame_size+i]=SATURATE(st->x1d[i],536854528);
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speex_move(st->excBuf, st->excBuf+st->frame_size, (st->bufSize-st->frame_size)*sizeof(spx_sig_t));
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ALLOC(low_pi_gain, st->nbSubframes, spx_word32_t);
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ALLOC(low_exc, st->frame_size, spx_sig_t);
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ALLOC(low_innov, st->frame_size, spx_sig_t);
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speex_encoder_ctl(st->st_low, SPEEX_GET_PI_GAIN, low_pi_gain);
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speex_encoder_ctl(st->st_low, SPEEX_GET_EXC, low_exc);
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speex_encoder_ctl(st->st_low, SPEEX_GET_INNOV, low_innov);
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speex_encoder_ctl(st->st_low, SPEEX_GET_LOW_MODE, &dtx);
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if (dtx==0)
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dtx=1;
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else
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dtx=0;
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{
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VARDECL(spx_word16_t *w_sig);
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ALLOC(w_sig, st->windowSize, spx_word16_t);
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/* Window for analysis */
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for (i=0;i<st->windowSize;i++)
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w_sig[i] = SHR(MULT16_16(SHR((spx_word32_t)(st->high[i]),SIG_SHIFT),st->window[i]),SIG_SHIFT);
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/* Compute auto-correlation */
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_spx_autocorr(w_sig, st->autocorr, st->lpcSize+1, st->windowSize);
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}
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st->autocorr[0] = (spx_word16_t)(st->autocorr[0]*st->lpc_floor); /* Noise floor in auto-correlation domain */
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/* Lag windowing: equivalent to filtering in the power-spectrum domain */
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for (i=0;i<st->lpcSize+1;i++)
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st->autocorr[i] = MULT16_16_Q14(st->autocorr[i],st->lagWindow[i]);
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/* Levinson-Durbin */
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_spx_lpc(st->lpc+1, st->autocorr, st->lpcSize);
|
|
st->lpc[0] = (spx_coef_t)LPC_SCALING;
|
|
|
|
/* LPC to LSPs (x-domain) transform */
|
|
roots=lpc_to_lsp (st->lpc, st->lpcSize, st->lsp, 15, LSP_DELTA1, stack);
|
|
if (roots!=st->lpcSize)
|
|
{
|
|
roots = lpc_to_lsp (st->lpc, st->lpcSize, st->lsp, 11, LSP_DELTA2, stack);
|
|
if (roots!=st->lpcSize) {
|
|
/*If we can't find all LSP's, do some damage control and use a flat filter*/
|
|
for (i=0;i<st->lpcSize;i++)
|
|
{
|
|
st->lsp[i]=M_PI*((float)(i+1))/(st->lpcSize+1);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* VBR code */
|
|
if ((st->vbr_enabled || st->vad_enabled) && !dtx)
|
|
{
|
|
float e_low=0, e_high=0;
|
|
float ratio;
|
|
if (st->abr_enabled)
|
|
{
|
|
float qual_change=0;
|
|
if (st->abr_drift2 * st->abr_drift > 0)
|
|
{
|
|
/* Only adapt if long-term and short-term drift are the same sign */
|
|
qual_change = -.00001*st->abr_drift/(1+st->abr_count);
|
|
if (qual_change>.1)
|
|
qual_change=.1;
|
|
if (qual_change<-.1)
|
|
qual_change=-.1;
|
|
}
|
|
st->vbr_quality += qual_change;
|
|
if (st->vbr_quality>10)
|
|
st->vbr_quality=10;
|
|
if (st->vbr_quality<0)
|
|
st->vbr_quality=0;
|
|
}
|
|
|
|
|
|
/*FIXME: Are the two signals (low, high) in sync? */
|
|
e_low = compute_rms(st->x0d, st->frame_size);
|
|
e_high = compute_rms(st->high, st->frame_size);
|
|
ratio = 2*log((1+e_high)/(1+e_low));
|
|
|
|
speex_encoder_ctl(st->st_low, SPEEX_GET_RELATIVE_QUALITY, &st->relative_quality);
|
|
if (ratio<-4)
|
|
ratio=-4;
|
|
if (ratio>2)
|
|
ratio=2;
|
|
/*if (ratio>-2)*/
|
|
if (st->vbr_enabled)
|
|
{
|
|
int modeid;
|
|
modeid = mode->nb_modes-1;
|
|
st->relative_quality+=1.0*(ratio+2);
|
|
if (st->relative_quality<-1)
|
|
st->relative_quality=-1;
|
|
while (modeid)
|
|
{
|
|
int v1;
|
|
float thresh;
|
|
v1=(int)floor(st->vbr_quality);
|
|
if (v1==10)
|
|
thresh = mode->vbr_thresh[modeid][v1];
|
|
else
|
|
thresh = (st->vbr_quality-v1) * mode->vbr_thresh[modeid][v1+1] +
|
|
(1+v1-st->vbr_quality) * mode->vbr_thresh[modeid][v1];
|
|
if (st->relative_quality >= thresh)
|
|
break;
|
|
modeid--;
|
|
}
|
|
speex_encoder_ctl(state, SPEEX_SET_HIGH_MODE, &modeid);
|
|
if (st->abr_enabled)
|
|
{
|
|
int bitrate;
|
|
speex_encoder_ctl(state, SPEEX_GET_BITRATE, &bitrate);
|
|
st->abr_drift+=(bitrate-st->abr_enabled);
|
|
st->abr_drift2 = .95*st->abr_drift2 + .05*(bitrate-st->abr_enabled);
|
|
st->abr_count += 1.0;
|
|
}
|
|
|
|
} else {
|
|
/* VAD only */
|
|
int modeid;
|
|
if (st->relative_quality<2.0)
|
|
modeid=1;
|
|
else
|
|
modeid=st->submodeSelect;
|
|
/*speex_encoder_ctl(state, SPEEX_SET_MODE, &mode);*/
|
|
st->submodeID=modeid;
|
|
|
|
}
|
|
/*fprintf (stderr, "%f %f\n", ratio, low_qual);*/
|
|
}
|
|
|
|
if (st->encode_submode)
|
|
{
|
|
speex_bits_pack(bits, 1, 1);
|
|
if (dtx)
|
|
speex_bits_pack(bits, 0, SB_SUBMODE_BITS);
|
|
else
|
|
speex_bits_pack(bits, st->submodeID, SB_SUBMODE_BITS);
|
|
}
|
|
|
|
/* If null mode (no transmission), just set a couple things to zero*/
|
|
if (dtx || st->submodes[st->submodeID] == NULL)
|
|
{
|
|
for (i=0;i<st->frame_size;i++)
|
|
st->exc[i]=st->sw[i]=VERY_SMALL;
|
|
|
|
for (i=0;i<st->lpcSize;i++)
|
|
st->mem_sw[i]=0;
|
|
st->first=1;
|
|
|
|
/* Final signal synthesis from excitation */
|
|
iir_mem2(st->exc, st->interp_qlpc, st->high, st->frame_size, st->lpcSize, st->mem_sp);
|
|
|
|
#ifdef RESYNTH
|
|
/* Reconstruct the original */
|
|
fir_mem_up(st->x0d, h0, st->y0, st->full_frame_size, QMF_ORDER, st->g0_mem, stack);
|
|
fir_mem_up(st->high, h1, st->y1, st->full_frame_size, QMF_ORDER, st->g1_mem, stack);
|
|
|
|
for (i=0;i<st->full_frame_size;i++)
|
|
in[i]=SHR(st->y0[i]-st->y1[i], SIG_SHIFT-1);
|
|
#endif
|
|
|
|
if (dtx)
|
|
return 0;
|
|
else
|
|
return 1;
|
|
}
|
|
|
|
|
|
/* LSP quantization */
|
|
SUBMODE(lsp_quant)(st->lsp, st->qlsp, st->lpcSize, bits);
|
|
|
|
if (st->first)
|
|
{
|
|
for (i=0;i<st->lpcSize;i++)
|
|
st->old_lsp[i] = st->lsp[i];
|
|
for (i=0;i<st->lpcSize;i++)
|
|
st->old_qlsp[i] = st->qlsp[i];
|
|
}
|
|
|
|
ALLOC(mem, st->lpcSize, spx_mem_t);
|
|
ALLOC(syn_resp, st->subframeSize, spx_word16_t);
|
|
ALLOC(innov, st->subframeSize, spx_sig_t);
|
|
|
|
for (sub=0;sub<st->nbSubframes;sub++)
|
|
{
|
|
spx_sig_t *exc, *sp, *res, *target, *sw;
|
|
spx_word16_t filter_ratio;
|
|
int offset;
|
|
spx_word32_t rl, rh;
|
|
spx_word16_t eh=0;
|
|
|
|
offset = st->subframeSize*sub;
|
|
sp=st->high+offset;
|
|
exc=st->exc+offset;
|
|
res=st->res+offset;
|
|
target=st->target+offset;
|
|
sw=st->sw+offset;
|
|
|
|
/* LSP interpolation (quantized and unquantized) */
|
|
lsp_interpolate(st->old_lsp, st->lsp, st->interp_lsp, st->lpcSize, sub, st->nbSubframes);
|
|
lsp_interpolate(st->old_qlsp, st->qlsp, st->interp_qlsp, st->lpcSize, sub, st->nbSubframes);
|
|
|
|
lsp_enforce_margin(st->interp_lsp, st->lpcSize, LSP_MARGIN);
|
|
lsp_enforce_margin(st->interp_qlsp, st->lpcSize, LSP_MARGIN);
|
|
|
|
lsp_to_lpc(st->interp_lsp, st->interp_lpc, st->lpcSize,stack);
|
|
lsp_to_lpc(st->interp_qlsp, st->interp_qlpc, st->lpcSize, stack);
|
|
|
|
bw_lpc(st->gamma1, st->interp_lpc, st->bw_lpc1, st->lpcSize);
|
|
bw_lpc(st->gamma2, st->interp_lpc, st->bw_lpc2, st->lpcSize);
|
|
|
|
/* Compute mid-band (4000 Hz for wideband) response of low-band and high-band
|
|
filters */
|
|
st->pi_gain[sub]=LPC_SCALING;
|
|
rh = LPC_SCALING;
|
|
for (i=1;i<=st->lpcSize;i+=2)
|
|
{
|
|
rh += st->interp_qlpc[i+1] - st->interp_qlpc[i];
|
|
st->pi_gain[sub] += st->interp_qlpc[i] + st->interp_qlpc[i+1];
|
|
}
|
|
|
|
rl = low_pi_gain[sub];
|
|
#ifdef FIXED_POINT
|
|
filter_ratio=DIV32_16(SHL(rl+82,2),SHR(82+rh,5));
|
|
#else
|
|
filter_ratio=(rl+.01)/(rh+.01);
|
|
#endif
|
|
|
|
/* Compute "real excitation" */
|
|
fir_mem2(sp, st->interp_qlpc, exc, st->subframeSize, st->lpcSize, st->mem_sp2);
|
|
/* Compute energy of low-band and high-band excitation */
|
|
|
|
eh = compute_rms(exc, st->subframeSize);
|
|
|
|
if (!SUBMODE(innovation_quant)) {/* 1 for spectral folding excitation, 0 for stochastic */
|
|
float g;
|
|
spx_word16_t el;
|
|
el = compute_rms(low_innov+offset, st->subframeSize);
|
|
|
|
/* Gain to use if we want to use the low-band excitation for high-band */
|
|
g=eh/(.01+el);
|
|
|
|
#if 0
|
|
{
|
|
char *tmp_stack=stack;
|
|
float *tmp_sig;
|
|
float g2;
|
|
ALLOC(tmp_sig, st->subframeSize, spx_sig_t);
|
|
for (i=0;i<st->lpcSize;i++)
|
|
mem[i]=st->mem_sp[i];
|
|
iir_mem2(low_innov+offset, st->interp_qlpc, tmp_sig, st->subframeSize, st->lpcSize, mem);
|
|
g2 = compute_rms(sp, st->subframeSize)/(.01+compute_rms(tmp_sig, st->subframeSize));
|
|
/*fprintf (stderr, "gains: %f %f\n", g, g2);*/
|
|
g = g2;
|
|
stack = tmp_stack;
|
|
}
|
|
#endif
|
|
|
|
#ifdef FIXED_POINT
|
|
g *= filter_ratio/128.;
|
|
#else
|
|
g *= filter_ratio;
|
|
#endif
|
|
/*print_vec(&g, 1, "gain factor");*/
|
|
/* Gain quantization */
|
|
{
|
|
int quant = (int) floor(.5 + 10 + 8.0 * log((g+.0001)));
|
|
/*speex_warning_int("tata", quant);*/
|
|
if (quant<0)
|
|
quant=0;
|
|
if (quant>31)
|
|
quant=31;
|
|
speex_bits_pack(bits, quant, 5);
|
|
}
|
|
|
|
} else {
|
|
spx_word16_t gc;
|
|
spx_word32_t scale;
|
|
spx_word16_t el;
|
|
el = compute_rms(low_exc+offset, st->subframeSize);
|
|
|
|
gc = DIV32_16(MULT16_16(filter_ratio,1+eh),1+el);
|
|
|
|
/* This is a kludge that cleans up a historical bug */
|
|
if (st->subframeSize==80)
|
|
gc *= 0.70711;
|
|
/*printf ("%f %f %f %f\n", el, eh, filter_ratio, gc);*/
|
|
#ifdef FIXED_POINT
|
|
{
|
|
int qgc = scal_quant(gc, gc_quant_bound, 16);
|
|
speex_bits_pack(bits, qgc, 4);
|
|
gc = MULT16_32_Q15(28626,gc_quant_bound[qgc]);
|
|
}
|
|
#else
|
|
{
|
|
int qgc = (int)floor(.5+3.7*(log(gc)+0.15556));
|
|
if (qgc<0)
|
|
qgc=0;
|
|
if (qgc>15)
|
|
qgc=15;
|
|
speex_bits_pack(bits, qgc, 4);
|
|
gc = exp((1/3.7)*qgc-0.15556);
|
|
}
|
|
#endif
|
|
if (st->subframeSize==80)
|
|
gc *= 1.4142;
|
|
|
|
scale = SHL(MULT16_16(DIV32_16(SHL(gc,SIG_SHIFT-4),filter_ratio),(1+el)),4);
|
|
|
|
compute_impulse_response(st->interp_qlpc, st->bw_lpc1, st->bw_lpc2, syn_resp, st->subframeSize, st->lpcSize, stack);
|
|
|
|
|
|
/* Reset excitation */
|
|
for (i=0;i<st->subframeSize;i++)
|
|
exc[i]=VERY_SMALL;
|
|
|
|
/* Compute zero response (ringing) of A(z/g1) / ( A(z/g2) * Aq(z) ) */
|
|
for (i=0;i<st->lpcSize;i++)
|
|
mem[i]=st->mem_sp[i];
|
|
iir_mem2(exc, st->interp_qlpc, exc, st->subframeSize, st->lpcSize, mem);
|
|
|
|
for (i=0;i<st->lpcSize;i++)
|
|
mem[i]=st->mem_sw[i];
|
|
filter_mem2(exc, st->bw_lpc1, st->bw_lpc2, res, st->subframeSize, st->lpcSize, mem);
|
|
|
|
/* Compute weighted signal */
|
|
for (i=0;i<st->lpcSize;i++)
|
|
mem[i]=st->mem_sw[i];
|
|
filter_mem2(sp, st->bw_lpc1, st->bw_lpc2, sw, st->subframeSize, st->lpcSize, mem);
|
|
|
|
/* Compute target signal */
|
|
for (i=0;i<st->subframeSize;i++)
|
|
target[i]=sw[i]-res[i];
|
|
|
|
for (i=0;i<st->subframeSize;i++)
|
|
exc[i]=0;
|
|
|
|
signal_div(target, target, scale, st->subframeSize);
|
|
|
|
/* Reset excitation */
|
|
for (i=0;i<st->subframeSize;i++)
|
|
innov[i]=0;
|
|
|
|
/*print_vec(target, st->subframeSize, "\ntarget");*/
|
|
SUBMODE(innovation_quant)(target, st->interp_qlpc, st->bw_lpc1, st->bw_lpc2,
|
|
SUBMODE(innovation_params), st->lpcSize, st->subframeSize,
|
|
innov, syn_resp, bits, stack, (st->complexity+1)>>1, SUBMODE(double_codebook));
|
|
/*print_vec(target, st->subframeSize, "after");*/
|
|
|
|
signal_mul(innov, innov, scale, st->subframeSize);
|
|
|
|
for (i=0;i<st->subframeSize;i++)
|
|
exc[i] = ADD32(exc[i], innov[i]);
|
|
|
|
if (SUBMODE(double_codebook)) {
|
|
char *tmp_stack=stack;
|
|
VARDECL(spx_sig_t *innov2);
|
|
ALLOC(innov2, st->subframeSize, spx_sig_t);
|
|
for (i=0;i<st->subframeSize;i++)
|
|
innov2[i]=0;
|
|
for (i=0;i<st->subframeSize;i++)
|
|
target[i]*=2.5;
|
|
SUBMODE(innovation_quant)(target, st->interp_qlpc, st->bw_lpc1, st->bw_lpc2,
|
|
SUBMODE(innovation_params), st->lpcSize, st->subframeSize,
|
|
innov2, syn_resp, bits, stack, (st->complexity+1)>>1, 0);
|
|
for (i=0;i<st->subframeSize;i++)
|
|
innov2[i]*=scale*(1/2.5)/SIG_SCALING;
|
|
for (i=0;i<st->subframeSize;i++)
|
|
exc[i] = ADD32(exc[i],innov2[i]);
|
|
stack = tmp_stack;
|
|
}
|
|
|
|
}
|
|
|
|
/*Keep the previous memory*/
|
|
for (i=0;i<st->lpcSize;i++)
|
|
mem[i]=st->mem_sp[i];
|
|
/* Final signal synthesis from excitation */
|
|
iir_mem2(exc, st->interp_qlpc, sp, st->subframeSize, st->lpcSize, st->mem_sp);
|
|
|
|
/* Compute weighted signal again, from synthesized speech (not sure it's the right thing) */
|
|
filter_mem2(sp, st->bw_lpc1, st->bw_lpc2, sw, st->subframeSize, st->lpcSize, st->mem_sw);
|
|
}
|
|
|
|
|
|
#ifdef RESYNTH
|
|
/* Reconstruct the original */
|
|
fir_mem_up(st->x0d, h0, st->y0, st->full_frame_size, QMF_ORDER, st->g0_mem, stack);
|
|
fir_mem_up(st->high, h1, st->y1, st->full_frame_size, QMF_ORDER, st->g1_mem, stack);
|
|
|
|
for (i=0;i<st->full_frame_size;i++)
|
|
in[i]=SHR(st->y0[i]-st->y1[i], SIG_SHIFT-1);
|
|
#endif
|
|
for (i=0;i<st->lpcSize;i++)
|
|
st->old_lsp[i] = st->lsp[i];
|
|
for (i=0;i<st->lpcSize;i++)
|
|
st->old_qlsp[i] = st->qlsp[i];
|
|
|
|
st->first=0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void *sb_decoder_init(const SpeexMode *m)
|
|
{
|
|
SBDecState *st;
|
|
const SpeexSBMode *mode;
|
|
#if defined(VAR_ARRAYS) || defined (USE_ALLOCA)
|
|
st = (SBDecState*)speex_alloc(sizeof(SBDecState));
|
|
st->stack = NULL;
|
|
#else
|
|
st = (SBDecState*)speex_alloc(sizeof(SBDecState)+6000*sizeof(spx_sig_t));
|
|
st->stack = ((char*)st) + sizeof(SBDecState);
|
|
#endif
|
|
if (!st)
|
|
return NULL;
|
|
st->mode = m;
|
|
mode=(const SpeexSBMode*)m->mode;
|
|
|
|
st->encode_submode = 1;
|
|
|
|
|
|
|
|
|
|
st->st_low = speex_decoder_init(mode->nb_mode);
|
|
st->full_frame_size = 2*mode->frameSize;
|
|
st->frame_size = mode->frameSize;
|
|
st->subframeSize = mode->subframeSize;
|
|
st->nbSubframes = mode->frameSize/mode->subframeSize;
|
|
st->lpcSize=mode->lpcSize;
|
|
speex_decoder_ctl(st->st_low, SPEEX_GET_SAMPLING_RATE, &st->sampling_rate);
|
|
st->sampling_rate*=2;
|
|
|
|
st->submodes=mode->submodes;
|
|
st->submodeID=mode->defaultSubmode;
|
|
|
|
st->first=1;
|
|
|
|
|
|
st->x0d=speex_alloc((st->frame_size)*sizeof(spx_sig_t));
|
|
st->x1d=speex_alloc((st->frame_size)*sizeof(spx_sig_t));
|
|
st->high=speex_alloc((st->full_frame_size)*sizeof(spx_sig_t));
|
|
st->y0=speex_alloc((st->full_frame_size)*sizeof(spx_sig_t));
|
|
st->y1=speex_alloc((st->full_frame_size)*sizeof(spx_sig_t));
|
|
|
|
st->g0_mem=speex_alloc((QMF_ORDER)*sizeof(spx_word32_t));
|
|
st->g1_mem=speex_alloc((QMF_ORDER)*sizeof(spx_word32_t));
|
|
|
|
st->exc=speex_alloc((st->frame_size)*sizeof(spx_sig_t));
|
|
|
|
st->qlsp = speex_alloc((st->lpcSize)*sizeof(spx_lsp_t));
|
|
st->old_qlsp = speex_alloc((st->lpcSize)*sizeof(spx_lsp_t));
|
|
st->interp_qlsp = speex_alloc((st->lpcSize)*sizeof(spx_lsp_t));
|
|
st->interp_qlpc = speex_alloc((st->lpcSize+1)*sizeof(spx_coef_t));
|
|
|
|
st->pi_gain = speex_alloc((st->nbSubframes)*sizeof(spx_word32_t));
|
|
st->mem_sp = speex_alloc((2*st->lpcSize)*sizeof(spx_mem_t));
|
|
|
|
st->lpc_enh_enabled=0;
|
|
|
|
#ifdef ENABLE_VALGRIND
|
|
VALGRIND_MAKE_READABLE(st, (st->stack-(char*)st));
|
|
#endif
|
|
return st;
|
|
}
|
|
|
|
void sb_decoder_destroy(void *state)
|
|
{
|
|
SBDecState *st;
|
|
st = (SBDecState*)state;
|
|
speex_decoder_destroy(st->st_low);
|
|
|
|
speex_free(state);
|
|
}
|
|
|
|
static void sb_decode_lost(SBDecState *st, spx_word16_t *out, int dtx, char *stack)
|
|
{
|
|
int i;
|
|
VARDECL(spx_coef_t *awk1);
|
|
VARDECL(spx_coef_t *awk2);
|
|
VARDECL(spx_coef_t *awk3);
|
|
int saved_modeid=0;
|
|
|
|
if (dtx)
|
|
{
|
|
saved_modeid=st->submodeID;
|
|
st->submodeID=1;
|
|
} else {
|
|
bw_lpc(GAMMA_SCALING*0.99, st->interp_qlpc, st->interp_qlpc, st->lpcSize);
|
|
}
|
|
|
|
st->first=1;
|
|
|
|
ALLOC(awk1, st->lpcSize+1, spx_coef_t);
|
|
ALLOC(awk2, st->lpcSize+1, spx_coef_t);
|
|
ALLOC(awk3, st->lpcSize+1, spx_coef_t);
|
|
|
|
if (st->lpc_enh_enabled)
|
|
{
|
|
spx_word16_t k1,k2,k3;
|
|
if (st->submodes[st->submodeID] != NULL)
|
|
{
|
|
k1=SUBMODE(lpc_enh_k1);
|
|
k2=SUBMODE(lpc_enh_k2);
|
|
k3=SUBMODE(lpc_enh_k3);
|
|
} else {
|
|
k1=k2=.7*GAMMA_SCALING;
|
|
k3 = 0;
|
|
}
|
|
bw_lpc(k1, st->interp_qlpc, awk1, st->lpcSize);
|
|
bw_lpc(k2, st->interp_qlpc, awk2, st->lpcSize);
|
|
bw_lpc(k3, st->interp_qlpc, awk3, st->lpcSize);
|
|
/*fprintf (stderr, "%f %f %f\n", k1, k2, k3);*/
|
|
}
|
|
|
|
|
|
/* Final signal synthesis from excitation */
|
|
if (!dtx)
|
|
{
|
|
for (i=0;i<st->frame_size;i++)
|
|
st->exc[i] *= .9;
|
|
}
|
|
|
|
for (i=0;i<st->frame_size;i++)
|
|
st->high[i]=st->exc[i];
|
|
|
|
if (st->lpc_enh_enabled)
|
|
{
|
|
/* Use enhanced LPC filter */
|
|
filter_mem2(st->high, awk2, awk1, st->high, st->frame_size, st->lpcSize,
|
|
st->mem_sp+st->lpcSize);
|
|
filter_mem2(st->high, awk3, st->interp_qlpc, st->high, st->frame_size, st->lpcSize,
|
|
st->mem_sp);
|
|
} else {
|
|
/* Use regular filter */
|
|
for (i=0;i<st->lpcSize;i++)
|
|
st->mem_sp[st->lpcSize+i] = 0;
|
|
iir_mem2(st->high, st->interp_qlpc, st->high, st->frame_size, st->lpcSize,
|
|
st->mem_sp);
|
|
}
|
|
|
|
/*iir_mem2(st->exc, st->interp_qlpc, st->high, st->frame_size, st->lpcSize, st->mem_sp);*/
|
|
|
|
/* Reconstruct the original */
|
|
fir_mem_up(st->x0d, h0, st->y0, st->full_frame_size, QMF_ORDER, st->g0_mem, stack);
|
|
fir_mem_up(st->high, h1, st->y1, st->full_frame_size, QMF_ORDER, st->g1_mem, stack);
|
|
|
|
mix_and_saturate(st->y0, st->y1, out, st->full_frame_size);
|
|
|
|
if (dtx)
|
|
{
|
|
st->submodeID=saved_modeid;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
int sb_decode(void *state, SpeexBits *bits, void *vout)
|
|
{
|
|
int i, sub;
|
|
SBDecState *st;
|
|
int wideband;
|
|
int ret;
|
|
char *stack;
|
|
VARDECL(spx_word32_t *low_pi_gain);
|
|
VARDECL(spx_sig_t *low_exc);
|
|
VARDECL(spx_sig_t *low_innov);
|
|
VARDECL(spx_coef_t *awk1);
|
|
VARDECL(spx_coef_t *awk2);
|
|
VARDECL(spx_coef_t *awk3);
|
|
int dtx;
|
|
const SpeexSBMode *mode;
|
|
spx_word16_t *out = vout;
|
|
|
|
st = (SBDecState*)state;
|
|
stack=st->stack;
|
|
mode = (const SpeexSBMode*)(st->mode->mode);
|
|
|
|
{
|
|
VARDECL(spx_word16_t *low);
|
|
ALLOC(low, st->frame_size, spx_word16_t);
|
|
|
|
/* Decode the low-band */
|
|
ret = speex_decode_native(st->st_low, bits, low);
|
|
|
|
for (i=0;i<st->frame_size;i++)
|
|
st->x0d[i] = SHL((spx_sig_t)low[i], SIG_SHIFT);
|
|
}
|
|
|
|
speex_decoder_ctl(st->st_low, SPEEX_GET_DTX_STATUS, &dtx);
|
|
|
|
/* If error decoding the narrowband part, propagate error */
|
|
if (ret!=0)
|
|
{
|
|
return ret;
|
|
}
|
|
|
|
if (!bits)
|
|
{
|
|
sb_decode_lost(st, out, dtx, stack);
|
|
return 0;
|
|
}
|
|
|
|
if (st->encode_submode)
|
|
{
|
|
|
|
/*Check "wideband bit"*/
|
|
if (speex_bits_remaining(bits)>0)
|
|
wideband = speex_bits_peek(bits);
|
|
else
|
|
wideband = 0;
|
|
if (wideband)
|
|
{
|
|
/*Regular wideband frame, read the submode*/
|
|
wideband = speex_bits_unpack_unsigned(bits, 1);
|
|
st->submodeID = speex_bits_unpack_unsigned(bits, SB_SUBMODE_BITS);
|
|
} else
|
|
{
|
|
/*Was a narrowband frame, set "null submode"*/
|
|
st->submodeID = 0;
|
|
}
|
|
if (st->submodeID != 0 && st->submodes[st->submodeID] == NULL)
|
|
{
|
|
speex_warning("Invalid mode encountered: corrupted stream?");
|
|
return -2;
|
|
}
|
|
}
|
|
|
|
/* If null mode (no transmission), just set a couple things to zero*/
|
|
if (st->submodes[st->submodeID] == NULL)
|
|
{
|
|
if (dtx)
|
|
{
|
|
sb_decode_lost(st, out, 1, stack);
|
|
return 0;
|
|
}
|
|
|
|
for (i=0;i<st->frame_size;i++)
|
|
st->exc[i]=VERY_SMALL;
|
|
|
|
st->first=1;
|
|
|
|
/* Final signal synthesis from excitation */
|
|
iir_mem2(st->exc, st->interp_qlpc, st->high, st->frame_size, st->lpcSize, st->mem_sp);
|
|
|
|
fir_mem_up(st->x0d, h0, st->y0, st->full_frame_size, QMF_ORDER, st->g0_mem, stack);
|
|
fir_mem_up(st->high, h1, st->y1, st->full_frame_size, QMF_ORDER, st->g1_mem, stack);
|
|
|
|
mix_and_saturate(st->y0, st->y1, out, st->full_frame_size);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
for (i=0;i<st->frame_size;i++)
|
|
st->exc[i]=0;
|
|
|
|
ALLOC(low_pi_gain, st->nbSubframes, spx_word32_t);
|
|
ALLOC(low_exc, st->frame_size, spx_sig_t);
|
|
ALLOC(low_innov, st->frame_size, spx_sig_t);
|
|
speex_decoder_ctl(st->st_low, SPEEX_GET_PI_GAIN, low_pi_gain);
|
|
speex_decoder_ctl(st->st_low, SPEEX_GET_EXC, low_exc);
|
|
speex_decoder_ctl(st->st_low, SPEEX_GET_INNOV, low_innov);
|
|
|
|
SUBMODE(lsp_unquant)(st->qlsp, st->lpcSize, bits);
|
|
|
|
if (st->first)
|
|
{
|
|
for (i=0;i<st->lpcSize;i++)
|
|
st->old_qlsp[i] = st->qlsp[i];
|
|
}
|
|
|
|
ALLOC(awk1, st->lpcSize+1, spx_coef_t);
|
|
ALLOC(awk2, st->lpcSize+1, spx_coef_t);
|
|
ALLOC(awk3, st->lpcSize+1, spx_coef_t);
|
|
|
|
for (sub=0;sub<st->nbSubframes;sub++)
|
|
{
|
|
spx_sig_t *exc, *sp;
|
|
spx_word16_t filter_ratio;
|
|
spx_word16_t el=0;
|
|
int offset;
|
|
spx_word32_t rl=0,rh=0;
|
|
|
|
offset = st->subframeSize*sub;
|
|
sp=st->high+offset;
|
|
exc=st->exc+offset;
|
|
|
|
/* LSP interpolation */
|
|
lsp_interpolate(st->old_qlsp, st->qlsp, st->interp_qlsp, st->lpcSize, sub, st->nbSubframes);
|
|
|
|
lsp_enforce_margin(st->interp_qlsp, st->lpcSize, LSP_MARGIN);
|
|
|
|
/* LSP to LPC */
|
|
lsp_to_lpc(st->interp_qlsp, st->interp_qlpc, st->lpcSize, stack);
|
|
|
|
|
|
if (st->lpc_enh_enabled)
|
|
{
|
|
spx_word16_t k1,k2,k3;
|
|
k1=SUBMODE(lpc_enh_k1);
|
|
k2=SUBMODE(lpc_enh_k2);
|
|
k3=SUBMODE(lpc_enh_k3);
|
|
bw_lpc(k1, st->interp_qlpc, awk1, st->lpcSize);
|
|
bw_lpc(k2, st->interp_qlpc, awk2, st->lpcSize);
|
|
bw_lpc(k3, st->interp_qlpc, awk3, st->lpcSize);
|
|
/*fprintf (stderr, "%f %f %f\n", k1, k2, k3);*/
|
|
}
|
|
|
|
|
|
/* Calculate reponse ratio between the low and high filter in the middle
|
|
of the band (4000 Hz) */
|
|
|
|
st->pi_gain[sub]=LPC_SCALING;
|
|
rh = LPC_SCALING;
|
|
for (i=1;i<=st->lpcSize;i+=2)
|
|
{
|
|
rh += st->interp_qlpc[i+1] - st->interp_qlpc[i];
|
|
st->pi_gain[sub] += st->interp_qlpc[i] + st->interp_qlpc[i+1];
|
|
}
|
|
|
|
rl = low_pi_gain[sub];
|
|
#ifdef FIXED_POINT
|
|
filter_ratio=DIV32_16(SHL(rl+82,2),SHR(82+rh,5));
|
|
#else
|
|
filter_ratio=(rl+.01)/(rh+.01);
|
|
#endif
|
|
|
|
for (i=0;i<st->subframeSize;i++)
|
|
exc[i]=0;
|
|
if (!SUBMODE(innovation_unquant))
|
|
{
|
|
float g;
|
|
int quant;
|
|
|
|
quant = speex_bits_unpack_unsigned(bits, 5);
|
|
g= exp(((float)quant-10)/8.0);
|
|
|
|
#ifdef FIXED_POINT
|
|
g /= filter_ratio/128.;
|
|
#else
|
|
g /= filter_ratio;
|
|
#endif
|
|
/* High-band excitation using the low-band excitation and a gain */
|
|
for (i=0;i<st->subframeSize;i++)
|
|
exc[i]=mode->folding_gain*g*low_innov[offset+i];
|
|
/*speex_rand_vec(mode->folding_gain*g*sqrt(el/st->subframeSize), exc, st->subframeSize);*/
|
|
} else {
|
|
spx_word16_t gc;
|
|
spx_word32_t scale;
|
|
int qgc = speex_bits_unpack_unsigned(bits, 4);
|
|
|
|
el = compute_rms(low_exc+offset, st->subframeSize);
|
|
|
|
#ifdef FIXED_POINT
|
|
gc = MULT16_32_Q15(28626,gc_quant_bound[qgc]);
|
|
#else
|
|
gc = exp((1/3.7)*qgc-0.15556);
|
|
#endif
|
|
|
|
if (st->subframeSize==80)
|
|
gc *= 1.4142;
|
|
|
|
scale = SHL(MULT16_16(DIV32_16(SHL(gc,SIG_SHIFT-4),filter_ratio),(1+el)),4);
|
|
|
|
SUBMODE(innovation_unquant)(exc, SUBMODE(innovation_params), st->subframeSize,
|
|
bits, stack);
|
|
|
|
signal_mul(exc,exc,scale,st->subframeSize);
|
|
|
|
if (SUBMODE(double_codebook)) {
|
|
char *tmp_stack=stack;
|
|
VARDECL(spx_sig_t *innov2);
|
|
ALLOC(innov2, st->subframeSize, spx_sig_t);
|
|
for (i=0;i<st->subframeSize;i++)
|
|
innov2[i]=0;
|
|
SUBMODE(innovation_unquant)(innov2, SUBMODE(innovation_params), st->subframeSize,
|
|
bits, stack);
|
|
for (i=0;i<st->subframeSize;i++)
|
|
innov2[i]*=scale/(float)SIG_SCALING*(1/2.5);
|
|
for (i=0;i<st->subframeSize;i++)
|
|
exc[i] = ADD32(exc[i],innov2[i]);
|
|
stack = tmp_stack;
|
|
}
|
|
|
|
}
|
|
|
|
for (i=0;i<st->subframeSize;i++)
|
|
sp[i]=exc[i];
|
|
if (st->lpc_enh_enabled)
|
|
{
|
|
/* Use enhanced LPC filter */
|
|
filter_mem2(sp, awk2, awk1, sp, st->subframeSize, st->lpcSize,
|
|
st->mem_sp+st->lpcSize);
|
|
filter_mem2(sp, awk3, st->interp_qlpc, sp, st->subframeSize, st->lpcSize,
|
|
st->mem_sp);
|
|
} else {
|
|
/* Use regular filter */
|
|
for (i=0;i<st->lpcSize;i++)
|
|
st->mem_sp[st->lpcSize+i] = 0;
|
|
iir_mem2(sp, st->interp_qlpc, sp, st->subframeSize, st->lpcSize,
|
|
st->mem_sp);
|
|
}
|
|
/*iir_mem2(exc, st->interp_qlpc, sp, st->subframeSize, st->lpcSize, st->mem_sp);*/
|
|
|
|
}
|
|
|
|
fir_mem_up(st->x0d, h0, st->y0, st->full_frame_size, QMF_ORDER, st->g0_mem, stack);
|
|
fir_mem_up(st->high, h1, st->y1, st->full_frame_size, QMF_ORDER, st->g1_mem, stack);
|
|
|
|
mix_and_saturate(st->y0, st->y1, out, st->full_frame_size);
|
|
|
|
for (i=0;i<st->lpcSize;i++)
|
|
st->old_qlsp[i] = st->qlsp[i];
|
|
|
|
st->first=0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
int sb_encoder_ctl(void *state, int request, void *ptr)
|
|
{
|
|
SBEncState *st;
|
|
st=(SBEncState*)state;
|
|
switch(request)
|
|
{
|
|
case SPEEX_GET_FRAME_SIZE:
|
|
(*(int*)ptr) = st->full_frame_size;
|
|
break;
|
|
case SPEEX_SET_HIGH_MODE:
|
|
st->submodeSelect = st->submodeID = (*(int*)ptr);
|
|
break;
|
|
case SPEEX_SET_LOW_MODE:
|
|
speex_encoder_ctl(st->st_low, SPEEX_SET_LOW_MODE, ptr);
|
|
break;
|
|
case SPEEX_SET_DTX:
|
|
speex_encoder_ctl(st->st_low, SPEEX_SET_DTX, ptr);
|
|
break;
|
|
case SPEEX_GET_DTX:
|
|
speex_encoder_ctl(st->st_low, SPEEX_GET_DTX, ptr);
|
|
break;
|
|
case SPEEX_GET_LOW_MODE:
|
|
speex_encoder_ctl(st->st_low, SPEEX_GET_LOW_MODE, ptr);
|
|
break;
|
|
case SPEEX_SET_MODE:
|
|
speex_encoder_ctl(st, SPEEX_SET_QUALITY, ptr);
|
|
break;
|
|
case SPEEX_SET_VBR:
|
|
st->vbr_enabled = (*(int*)ptr);
|
|
speex_encoder_ctl(st->st_low, SPEEX_SET_VBR, ptr);
|
|
break;
|
|
case SPEEX_GET_VBR:
|
|
(*(int*)ptr) = st->vbr_enabled;
|
|
break;
|
|
case SPEEX_SET_VAD:
|
|
st->vad_enabled = (*(int*)ptr);
|
|
speex_encoder_ctl(st->st_low, SPEEX_SET_VAD, ptr);
|
|
break;
|
|
case SPEEX_GET_VAD:
|
|
(*(int*)ptr) = st->vad_enabled;
|
|
break;
|
|
case SPEEX_SET_VBR_QUALITY:
|
|
{
|
|
int q;
|
|
float qual = (*(float*)ptr)+.6;
|
|
st->vbr_quality = (*(float*)ptr);
|
|
if (qual>10)
|
|
qual=10;
|
|
q=(int)floor(.5+*(float*)ptr);
|
|
if (q>10)
|
|
q=10;
|
|
speex_encoder_ctl(st->st_low, SPEEX_SET_VBR_QUALITY, &qual);
|
|
speex_encoder_ctl(state, SPEEX_SET_QUALITY, &q);
|
|
break;
|
|
}
|
|
case SPEEX_SET_ABR:
|
|
st->abr_enabled = (*(int*)ptr);
|
|
st->vbr_enabled = 1;
|
|
speex_encoder_ctl(st->st_low, SPEEX_SET_VBR, &st->vbr_enabled);
|
|
{
|
|
int i=10, rate, target;
|
|
float vbr_qual;
|
|
target = (*(int*)ptr);
|
|
while (i>=0)
|
|
{
|
|
speex_encoder_ctl(st, SPEEX_SET_QUALITY, &i);
|
|
speex_encoder_ctl(st, SPEEX_GET_BITRATE, &rate);
|
|
if (rate <= target)
|
|
break;
|
|
i--;
|
|
}
|
|
vbr_qual=i;
|
|
if (vbr_qual<0)
|
|
vbr_qual=0;
|
|
speex_encoder_ctl(st, SPEEX_SET_VBR_QUALITY, &vbr_qual);
|
|
st->abr_count=0;
|
|
st->abr_drift=0;
|
|
st->abr_drift2=0;
|
|
}
|
|
|
|
break;
|
|
case SPEEX_GET_ABR:
|
|
(*(int*)ptr) = st->abr_enabled;
|
|
break;
|
|
case SPEEX_SET_QUALITY:
|
|
{
|
|
int nb_qual;
|
|
int quality = (*(int*)ptr);
|
|
if (quality < 0)
|
|
quality = 0;
|
|
if (quality > 10)
|
|
quality = 10;
|
|
st->submodeSelect = st->submodeID = ((const SpeexSBMode*)(st->mode->mode))->quality_map[quality];
|
|
nb_qual = ((const SpeexSBMode*)(st->mode->mode))->low_quality_map[quality];
|
|
speex_encoder_ctl(st->st_low, SPEEX_SET_MODE, &nb_qual);
|
|
}
|
|
break;
|
|
case SPEEX_SET_COMPLEXITY:
|
|
speex_encoder_ctl(st->st_low, SPEEX_SET_COMPLEXITY, ptr);
|
|
st->complexity = (*(int*)ptr);
|
|
if (st->complexity<1)
|
|
st->complexity=1;
|
|
break;
|
|
case SPEEX_GET_COMPLEXITY:
|
|
(*(int*)ptr) = st->complexity;
|
|
break;
|
|
case SPEEX_SET_BITRATE:
|
|
{
|
|
int i=10, rate, target;
|
|
target = (*(int*)ptr);
|
|
while (i>=0)
|
|
{
|
|
speex_encoder_ctl(st, SPEEX_SET_QUALITY, &i);
|
|
speex_encoder_ctl(st, SPEEX_GET_BITRATE, &rate);
|
|
if (rate <= target)
|
|
break;
|
|
i--;
|
|
}
|
|
}
|
|
break;
|
|
case SPEEX_GET_BITRATE:
|
|
speex_encoder_ctl(st->st_low, request, ptr);
|
|
/*fprintf (stderr, "before: %d\n", (*(int*)ptr));*/
|
|
if (st->submodes[st->submodeID])
|
|
(*(int*)ptr) += st->sampling_rate*SUBMODE(bits_per_frame)/st->full_frame_size;
|
|
else
|
|
(*(int*)ptr) += st->sampling_rate*(SB_SUBMODE_BITS+1)/st->full_frame_size;
|
|
/*fprintf (stderr, "after: %d\n", (*(int*)ptr));*/
|
|
break;
|
|
case SPEEX_SET_SAMPLING_RATE:
|
|
{
|
|
int tmp=(*(int*)ptr);
|
|
st->sampling_rate = tmp;
|
|
tmp>>=1;
|
|
speex_encoder_ctl(st->st_low, SPEEX_SET_SAMPLING_RATE, &tmp);
|
|
}
|
|
break;
|
|
case SPEEX_GET_SAMPLING_RATE:
|
|
(*(int*)ptr)=st->sampling_rate;
|
|
break;
|
|
case SPEEX_RESET_STATE:
|
|
{
|
|
int i;
|
|
st->first = 1;
|
|
for (i=0;i<st->lpcSize;i++)
|
|
st->lsp[i]=(M_PI*((float)(i+1)))/(st->lpcSize+1);
|
|
for (i=0;i<st->lpcSize;i++)
|
|
st->mem_sw[i]=st->mem_sp[i]=st->mem_sp2[i]=0;
|
|
for (i=0;i<st->bufSize;i++)
|
|
st->excBuf[i]=0;
|
|
for (i=0;i<QMF_ORDER;i++)
|
|
st->h0_mem[i]=st->h1_mem[i]=st->g0_mem[i]=st->g1_mem[i]=0;
|
|
}
|
|
break;
|
|
case SPEEX_SET_SUBMODE_ENCODING:
|
|
st->encode_submode = (*(int*)ptr);
|
|
speex_encoder_ctl(st->st_low, SPEEX_SET_SUBMODE_ENCODING, &ptr);
|
|
break;
|
|
case SPEEX_GET_SUBMODE_ENCODING:
|
|
(*(int*)ptr) = st->encode_submode;
|
|
break;
|
|
case SPEEX_GET_LOOKAHEAD:
|
|
speex_encoder_ctl(st->st_low, SPEEX_GET_LOOKAHEAD, ptr);
|
|
(*(int*)ptr) = 2*(*(int*)ptr) + QMF_ORDER - 1;
|
|
break;
|
|
case SPEEX_GET_PI_GAIN:
|
|
{
|
|
int i;
|
|
spx_word32_t *g = (spx_word32_t*)ptr;
|
|
for (i=0;i<st->nbSubframes;i++)
|
|
g[i]=st->pi_gain[i];
|
|
}
|
|
break;
|
|
case SPEEX_GET_EXC:
|
|
{
|
|
int i;
|
|
spx_sig_t *e = (spx_sig_t*)ptr;
|
|
for (i=0;i<st->full_frame_size;i++)
|
|
e[i]=0;
|
|
for (i=0;i<st->frame_size;i++)
|
|
e[2*i]=2*st->exc[i];
|
|
}
|
|
break;
|
|
case SPEEX_GET_INNOV:
|
|
{
|
|
int i;
|
|
spx_sig_t *e = (spx_sig_t*)ptr;
|
|
for (i=0;i<st->full_frame_size;i++)
|
|
e[i]=0;
|
|
for (i=0;i<st->frame_size;i++)
|
|
e[2*i]=2*st->exc[i];
|
|
}
|
|
break;
|
|
case SPEEX_GET_RELATIVE_QUALITY:
|
|
(*(float*)ptr)=st->relative_quality;
|
|
break;
|
|
default:
|
|
speex_warning_int("Unknown nb_ctl request: ", request);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int sb_decoder_ctl(void *state, int request, void *ptr)
|
|
{
|
|
SBDecState *st;
|
|
st=(SBDecState*)state;
|
|
switch(request)
|
|
{
|
|
case SPEEX_SET_HIGH_MODE:
|
|
st->submodeID = (*(int*)ptr);
|
|
break;
|
|
case SPEEX_SET_LOW_MODE:
|
|
speex_decoder_ctl(st->st_low, SPEEX_SET_LOW_MODE, ptr);
|
|
break;
|
|
case SPEEX_GET_LOW_MODE:
|
|
speex_decoder_ctl(st->st_low, SPEEX_GET_LOW_MODE, ptr);
|
|
break;
|
|
case SPEEX_GET_FRAME_SIZE:
|
|
(*(int*)ptr) = st->full_frame_size;
|
|
break;
|
|
case SPEEX_SET_ENH:
|
|
speex_decoder_ctl(st->st_low, request, ptr);
|
|
st->lpc_enh_enabled = *((int*)ptr);
|
|
break;
|
|
case SPEEX_SET_MODE:
|
|
case SPEEX_SET_QUALITY:
|
|
{
|
|
int nb_qual;
|
|
int quality = (*(int*)ptr);
|
|
if (quality < 0)
|
|
quality = 0;
|
|
if (quality > 10)
|
|
quality = 10;
|
|
st->submodeID = ((const SpeexSBMode*)(st->mode->mode))->quality_map[quality];
|
|
nb_qual = ((const SpeexSBMode*)(st->mode->mode))->low_quality_map[quality];
|
|
speex_decoder_ctl(st->st_low, SPEEX_SET_MODE, &nb_qual);
|
|
}
|
|
break;
|
|
case SPEEX_GET_BITRATE:
|
|
speex_decoder_ctl(st->st_low, request, ptr);
|
|
if (st->submodes[st->submodeID])
|
|
(*(int*)ptr) += st->sampling_rate*SUBMODE(bits_per_frame)/st->full_frame_size;
|
|
else
|
|
(*(int*)ptr) += st->sampling_rate*(SB_SUBMODE_BITS+1)/st->full_frame_size;
|
|
break;
|
|
case SPEEX_SET_SAMPLING_RATE:
|
|
{
|
|
int tmp=(*(int*)ptr);
|
|
st->sampling_rate = tmp;
|
|
tmp>>=1;
|
|
speex_decoder_ctl(st->st_low, SPEEX_SET_SAMPLING_RATE, &tmp);
|
|
}
|
|
break;
|
|
case SPEEX_GET_SAMPLING_RATE:
|
|
(*(int*)ptr)=st->sampling_rate;
|
|
break;
|
|
case SPEEX_SET_HANDLER:
|
|
speex_decoder_ctl(st->st_low, SPEEX_SET_HANDLER, ptr);
|
|
break;
|
|
case SPEEX_SET_USER_HANDLER:
|
|
speex_decoder_ctl(st->st_low, SPEEX_SET_USER_HANDLER, ptr);
|
|
break;
|
|
case SPEEX_RESET_STATE:
|
|
{
|
|
int i;
|
|
for (i=0;i<2*st->lpcSize;i++)
|
|
st->mem_sp[i]=0;
|
|
for (i=0;i<QMF_ORDER;i++)
|
|
st->g0_mem[i]=st->g1_mem[i]=0;
|
|
}
|
|
break;
|
|
case SPEEX_SET_SUBMODE_ENCODING:
|
|
st->encode_submode = (*(int*)ptr);
|
|
speex_decoder_ctl(st->st_low, SPEEX_SET_SUBMODE_ENCODING, &ptr);
|
|
break;
|
|
case SPEEX_GET_SUBMODE_ENCODING:
|
|
(*(int*)ptr) = st->encode_submode;
|
|
break;
|
|
case SPEEX_GET_PI_GAIN:
|
|
{
|
|
int i;
|
|
spx_word32_t *g = (spx_word32_t*)ptr;
|
|
for (i=0;i<st->nbSubframes;i++)
|
|
g[i]=st->pi_gain[i];
|
|
}
|
|
break;
|
|
case SPEEX_GET_EXC:
|
|
{
|
|
int i;
|
|
spx_sig_t *e = (spx_sig_t*)ptr;
|
|
for (i=0;i<st->full_frame_size;i++)
|
|
e[i]=0;
|
|
for (i=0;i<st->frame_size;i++)
|
|
e[2*i]=2*st->exc[i];
|
|
}
|
|
break;
|
|
case SPEEX_GET_INNOV:
|
|
{
|
|
int i;
|
|
spx_sig_t *e = (spx_sig_t*)ptr;
|
|
for (i=0;i<st->full_frame_size;i++)
|
|
e[i]=0;
|
|
for (i=0;i<st->frame_size;i++)
|
|
e[2*i]=2*st->exc[i];
|
|
}
|
|
break;
|
|
case SPEEX_GET_DTX_STATUS:
|
|
speex_decoder_ctl(st->st_low, SPEEX_GET_DTX_STATUS, ptr);
|
|
break;
|
|
default:
|
|
speex_warning_int("Unknown nb_ctl request: ", request);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#endif
|
|
|