| /* Copyright (C) 2002 Jean-Marc Valin |
| File: sb_celp.c |
| |
| 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. |
| */ |
| |
| |
| #include <stdlib.h> |
| #include <math.h> |
| #include <stdio.h> |
| /*#include "nb_celp.h"*/ |
| #include "sb_celp.h" |
| #include "stdlib.h" |
| #include "filters.h" |
| #include "lpc.h" |
| #include "lsp.h" |
| #include "stack_alloc.h" |
| #include "cb_search.h" |
| #include "quant_lsp.h" |
| #include "vq.h" |
| #include "ltp.h" |
| #include "misc.h" |
| |
| #ifndef M_PI |
| #define M_PI 3.14159265358979323846 /* pi */ |
| #endif |
| |
| #define sqr(x) ((x)*(x)) |
| |
| #define SUBMODE(x) st->submodes[st->submodeID]->x |
| |
| #define QMF_ORDER 64 |
| static float h0[64] = { |
| 3.596189e-05, -0.0001123515, |
| -0.0001104587, 0.0002790277, |
| 0.0002298438, -0.0005953563, |
| -0.0003823631, 0.00113826, |
| 0.0005308539, -0.001986177, |
| -0.0006243724, 0.003235877, |
| 0.0005743159, -0.004989147, |
| -0.0002584767, 0.007367171, |
| -0.0004857935, -0.01050689, |
| 0.001894714, 0.01459396, |
| -0.004313674, -0.01994365, |
| 0.00828756, 0.02716055, |
| -0.01485397, -0.03764973, |
| 0.026447, 0.05543245, |
| -0.05095487, -0.09779096, |
| 0.1382363, 0.4600981, |
| 0.4600981, 0.1382363, |
| -0.09779096, -0.05095487, |
| 0.05543245, 0.026447, |
| -0.03764973, -0.01485397, |
| 0.02716055, 0.00828756, |
| -0.01994365, -0.004313674, |
| 0.01459396, 0.001894714, |
| -0.01050689, -0.0004857935, |
| 0.007367171, -0.0002584767, |
| -0.004989147, 0.0005743159, |
| 0.003235877, -0.0006243724, |
| -0.001986177, 0.0005308539, |
| 0.00113826, -0.0003823631, |
| -0.0005953563, 0.0002298438, |
| 0.0002790277, -0.0001104587, |
| -0.0001123515, 3.596189e-05 |
| }; |
| |
| static float h1[64] = { |
| 3.596189e-05, 0.0001123515, |
| -0.0001104587, -0.0002790277, |
| 0.0002298438, 0.0005953563, |
| -0.0003823631, -0.00113826, |
| 0.0005308539, 0.001986177, |
| -0.0006243724, -0.003235877, |
| 0.0005743159, 0.004989147, |
| -0.0002584767, -0.007367171, |
| -0.0004857935, 0.01050689, |
| 0.001894714, -0.01459396, |
| -0.004313674, 0.01994365, |
| 0.00828756, -0.02716055, |
| -0.01485397, 0.03764973, |
| 0.026447, -0.05543245, |
| -0.05095487, 0.09779096, |
| 0.1382363, -0.4600981, |
| 0.4600981, -0.1382363, |
| -0.09779096, 0.05095487, |
| 0.05543245, -0.026447, |
| -0.03764973, 0.01485397, |
| 0.02716055, -0.00828756, |
| -0.01994365, 0.004313674, |
| 0.01459396, -0.001894714, |
| -0.01050689, 0.0004857935, |
| 0.007367171, 0.0002584767, |
| -0.004989147, -0.0005743159, |
| 0.003235877, 0.0006243724, |
| -0.001986177, -0.0005308539, |
| 0.00113826, 0.0003823631, |
| -0.0005953563, -0.0002298438, |
| 0.0002790277, 0.0001104587, |
| -0.0001123515, -3.596189e-05 |
| }; |
| |
| void *sb_encoder_init(SpeexMode *m) |
| { |
| int i; |
| SBEncState *st; |
| SpeexSBMode *mode; |
| |
| st = (SBEncState*)speex_alloc(sizeof(SBEncState)); |
| st->mode = m; |
| mode = (SpeexSBMode*)m->mode; |
| |
| st->st_low = speex_encoder_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->windowSize = st->frame_size*3/2; |
| st->lpcSize=mode->lpcSize; |
| st->bufSize=mode->bufSize; |
| |
| st->submodes=mode->submodes; |
| st->submodeSelect = st->submodeID=mode->defaultSubmode; |
| |
| { |
| /* FIXME: Should do this without explicit reference to a mode */ |
| #if 0 |
| int mod=6; |
| speex_encoder_ctl(st->st_low, SPEEX_SET_MODE, &mod); |
| #else |
| int mod=9; |
| speex_encoder_ctl(st->st_low, SPEEX_SET_QUALITY, &mod); |
| #endif |
| } |
| |
| st->lag_factor = mode->lag_factor; |
| st->lpc_floor = mode->lpc_floor; |
| st->gamma1=mode->gamma1; |
| st->gamma2=mode->gamma2; |
| st->first=1; |
| st->stack = speex_alloc(4000*sizeof(float)); |
| |
| st->x0d=(float*)speex_alloc(st->frame_size*sizeof(float)); |
| st->x1d=(float*)speex_alloc(st->frame_size*sizeof(float)); |
| st->high=(float*)speex_alloc(st->full_frame_size*sizeof(float)); |
| st->y0=(float*)speex_alloc(st->full_frame_size*sizeof(float)); |
| st->y1=(float*)speex_alloc(st->full_frame_size*sizeof(float)); |
| |
| st->h0_mem=(float*)speex_alloc(QMF_ORDER*sizeof(float)); |
| st->h1_mem=(float*)speex_alloc(QMF_ORDER*sizeof(float)); |
| st->g0_mem=(float*)speex_alloc(QMF_ORDER*sizeof(float)); |
| st->g1_mem=(float*)speex_alloc(QMF_ORDER*sizeof(float)); |
| |
| st->buf=(float*)speex_alloc(st->windowSize*sizeof(float)); |
| st->excBuf=(float*)speex_alloc(st->bufSize*sizeof(float)); |
| st->exc = st->excBuf + st->bufSize - st->windowSize; |
| |
| st->res=(float*)speex_alloc(st->frame_size*sizeof(float)); |
| st->sw=(float*)speex_alloc(st->frame_size*sizeof(float)); |
| st->target=(float*)speex_alloc(st->frame_size*sizeof(float)); |
| /*Asymetric "pseudo-Hamming" window*/ |
| { |
| int part1, part2; |
| part1 = st->subframeSize*7/2; |
| part2 = st->subframeSize*5/2; |
| st->window = (float*)speex_alloc(st->windowSize*sizeof(float)); |
| for (i=0;i<part1;i++) |
| st->window[i]=.54-.46*cos(M_PI*i/part1); |
| for (i=0;i<part2;i++) |
| st->window[part1+i]=.54+.46*cos(M_PI*i/part2); |
| } |
| |
| st->lagWindow = (float*)speex_alloc((st->lpcSize+1)*sizeof(float)); |
| for (i=0;i<st->lpcSize+1;i++) |
| st->lagWindow[i]=exp(-.5*sqr(2*M_PI*st->lag_factor*i)); |
| |
| st->rc = (float*)speex_alloc(st->lpcSize*sizeof(float)); |
| st->autocorr = (float*)speex_alloc((st->lpcSize+1)*sizeof(float)); |
| st->lpc = (float*)speex_alloc((st->lpcSize+1)*sizeof(float)); |
| st->bw_lpc1 = (float*)speex_alloc((st->lpcSize+1)*sizeof(float)); |
| st->bw_lpc2 = (float*)speex_alloc((st->lpcSize+1)*sizeof(float)); |
| st->lsp = (float*)speex_alloc(st->lpcSize*sizeof(float)); |
| st->qlsp = (float*)speex_alloc(st->lpcSize*sizeof(float)); |
| st->old_lsp = (float*)speex_alloc(st->lpcSize*sizeof(float)); |
| st->old_qlsp = (float*)speex_alloc(st->lpcSize*sizeof(float)); |
| st->interp_lsp = (float*)speex_alloc(st->lpcSize*sizeof(float)); |
| st->interp_qlsp = (float*)speex_alloc(st->lpcSize*sizeof(float)); |
| st->interp_lpc = (float*)speex_alloc((st->lpcSize+1)*sizeof(float)); |
| st->interp_qlpc = (float*)speex_alloc((st->lpcSize+1)*sizeof(float)); |
| st->pi_gain = (float*)speex_alloc(st->nbSubframes*sizeof(float)); |
| |
| st->mem_sp = (float*)speex_alloc(st->lpcSize*sizeof(float)); |
| st->mem_sp2 = (float*)speex_alloc(st->lpcSize*sizeof(float)); |
| st->mem_sw = (float*)speex_alloc(st->lpcSize*sizeof(float)); |
| |
| st->vbr_quality = 8; |
| st->vbr_enabled = 0; |
| st->vad_enabled = 0; |
| st->relative_quality=0; |
| |
| st->complexity=2; |
| speex_decoder_ctl(st->st_low, SPEEX_GET_SAMPLING_RATE, &st->sampling_rate); |
| st->sampling_rate*=2; |
| |
| return st; |
| } |
| |
| void sb_encoder_destroy(void *state) |
| { |
| SBEncState *st=(SBEncState*)state; |
| |
| speex_encoder_destroy(st->st_low); |
| speex_free(st->x0d); |
| speex_free(st->x1d); |
| speex_free(st->high); |
| speex_free(st->y0); |
| speex_free(st->y1); |
| speex_free(st->h0_mem); |
| speex_free(st->h1_mem); |
| speex_free(st->g0_mem); |
| speex_free(st->g1_mem); |
| |
| speex_free(st->buf); |
| speex_free(st->window); |
| speex_free(st->excBuf); |
| speex_free(st->sw); |
| speex_free(st->res); |
| speex_free(st->target); |
| speex_free(st->lagWindow); |
| speex_free(st->rc); |
| speex_free(st->autocorr); |
| speex_free(st->lpc); |
| speex_free(st->bw_lpc1); |
| speex_free(st->bw_lpc2); |
| speex_free(st->lsp); |
| speex_free(st->qlsp); |
| speex_free(st->old_lsp); |
| speex_free(st->old_qlsp); |
| speex_free(st->interp_lsp); |
| speex_free(st->interp_qlsp); |
| speex_free(st->interp_lpc); |
| speex_free(st->interp_qlpc); |
| |
| speex_free(st->mem_sp); |
| speex_free(st->mem_sp2); |
| speex_free(st->mem_sw); |
| speex_free(st->pi_gain); |
| |
| speex_free(st->stack); |
| |
| speex_free(st); |
| } |
| |
| |
| void sb_encode(void *state, float *in, SpeexBits *bits) |
| { |
| SBEncState *st; |
| int i, roots, sub; |
| void *stack; |
| float *mem, *innov, *syn_resp; |
| float *low_pi_gain, *low_exc, *low_innov; |
| SpeexSBMode *mode; |
| |
| st = (SBEncState*)state; |
| stack=st->stack; |
| mode = (SpeexSBMode*)(st->mode->mode); |
| |
| /* Compute the two sub-bands by filtering with h0 and h1*/ |
| qmf_decomp(in, h0, st->x0d, st->x1d, st->full_frame_size, QMF_ORDER, st->h0_mem, stack); |
| |
| /* Encode the narrowband part*/ |
| speex_encode(st->st_low, st->x0d, bits); |
| |
| /* High-band buffering / sync with low band */ |
| for (i=0;i<st->windowSize-st->frame_size;i++) |
| st->high[i] = st->high[st->frame_size+i]; |
| for (i=0;i<st->frame_size;i++) |
| st->high[st->windowSize-st->frame_size+i]=st->x1d[i]; |
| |
| speex_move(st->excBuf, st->excBuf+st->frame_size, (st->bufSize-st->frame_size)*sizeof(float)); |
| |
| |
| low_pi_gain = PUSH(stack, st->nbSubframes, float); |
| low_exc = PUSH(stack, st->frame_size, float); |
| low_innov = PUSH(stack, st->frame_size, float); |
| speex_encoder_ctl(st->st_low, SPEEX_GET_PI_GAIN, low_pi_gain); |
| speex_encoder_ctl(st->st_low, SPEEX_GET_EXC, low_exc); |
| speex_encoder_ctl(st->st_low, SPEEX_GET_INNOV, low_innov); |
| |
| /* Start encoding the high-band */ |
| for (i=0;i<st->windowSize;i++) |
| st->buf[i] = st->high[i] * st->window[i]; |
| |
| /* Compute auto-correlation */ |
| _spx_autocorr(st->buf, st->autocorr, st->lpcSize+1, st->windowSize); |
| |
| st->autocorr[0] += 1; /* prevents NANs */ |
| st->autocorr[0] *= st->lpc_floor; /* Noise floor in auto-correlation domain */ |
| /* Lag windowing: equivalent to filtering in the power-spectrum domain */ |
| for (i=0;i<st->lpcSize+1;i++) |
| st->autocorr[i] *= st->lagWindow[i]; |
| |
| /* Levinson-Durbin */ |
| wld(st->lpc+1, st->autocorr, st->rc, st->lpcSize); |
| st->lpc[0]=1; |
| |
| /* LPC to LSPs (x-domain) transform */ |
| roots=lpc_to_lsp (st->lpc, st->lpcSize, st->lsp, 15, 0.2, stack); |
| if (roots!=st->lpcSize) |
| { |
| roots = lpc_to_lsp (st->lpc, st->lpcSize, st->lsp, 11, 0.02, stack); |
| if (roots!=st->lpcSize) { |
| /*fprintf (stderr, "roots!=st->lpcSize (found only %d roots)\n", roots);*/ |
| |
| /*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]=cos(M_PI*((float)(i+1))/(st->lpcSize+1)); |
| } |
| } |
| } |
| |
| /* x-domain to angle domain*/ |
| for (i=0;i<st->lpcSize;i++) |
| st->lsp[i] = acos(st->lsp[i]); |
| |
| /* VBR code */ |
| if (st->vbr_enabled || st->vad_enabled){ |
| float e_low=0, e_high=0; |
| float ratio; |
| for (i=0;i<st->frame_size;i++) |
| { |
| e_low += st->x0d[i]* st->x0d[i]; |
| e_high += st->high[i]* st->high[i]; |
| } |
| ratio = 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); |
| 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--; |
| } |
| /*fprintf (stderr, "%f %d\n", low_qual, modeid);*/ |
| speex_encoder_ctl(state, SPEEX_SET_HIGH_MODE, &modeid); |
| /*fprintf (stderr, "%d %d\n", st->submodeID, modeid);*/ |
| } 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);*/ |
| } |
| |
| speex_bits_pack(bits, 1, 1); |
| speex_bits_pack(bits, st->submodeID, SB_SUBMODE_BITS); |
| |
| /* If null mode (no transmission), just set a couple things to zero*/ |
| if (st->submodes[st->submodeID] == NULL) |
| { |
| for (i=0;i<st->frame_size;i++) |
| st->exc[i]=st->sw[i]=0; |
| |
| 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->subframeSize, st->lpcSize, st->mem_sp); |
| |
| #ifndef RELEASE |
| |
| /* 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]=2*(st->y0[i]-st->y1[i]); |
| #endif |
| |
| return; |
| |
| } |
| |
| |
| /* LSP quantization */ |
| SUBMODE(lsp_quant)(st->lsp, st->qlsp, st->lpcSize, bits); |
| |
| /*printf ("high_lsp:"); |
| for (i=0;i<st->lpcSize;i++) |
| printf (" %f", st->lsp[i]); |
| printf ("\n");*/ |
| /*for (i=0;i<st->lpcSize;i++) |
| st->qlsp[i]=st->lsp[i];*/ |
| |
| |
| 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]; |
| } |
| |
| mem=PUSH(stack, st->lpcSize, float); |
| syn_resp=PUSH(stack, st->subframeSize, float); |
| innov = PUSH(stack, st->subframeSize, float); |
| |
| for (sub=0;sub<st->nbSubframes;sub++) |
| { |
| float *exc, *sp, *res, *target, *sw, tmp, filter_ratio; |
| int offset; |
| float rl, rh, eh=0, el=0; |
| int fold; |
| |
| 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) */ |
| tmp = (1.0 + sub)/st->nbSubframes; |
| for (i=0;i<st->lpcSize;i++) |
| st->interp_lsp[i] = (1-tmp)*st->old_lsp[i] + tmp*st->lsp[i]; |
| for (i=0;i<st->lpcSize;i++) |
| st->interp_qlsp[i] = (1-tmp)*st->old_qlsp[i] + tmp*st->qlsp[i]; |
| |
| /* Compute interpolated LPCs (quantized and unquantized) */ |
| for (i=0;i<st->lpcSize;i++) |
| st->interp_lsp[i] = cos(st->interp_lsp[i]); |
| for (i=0;i<st->lpcSize;i++) |
| st->interp_qlsp[i] = cos(st->interp_qlsp[i]); |
| |
| lsp_enforce_margin(st->interp_lsp, st->lpcSize, .002); |
| lsp_enforce_margin(st->interp_qlsp, st->lpcSize, .002); |
| |
| 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 */ |
| rl=rh=0; |
| tmp=1; |
| st->pi_gain[sub]=0; |
| for (i=0;i<=st->lpcSize;i++) |
| { |
| rh += tmp*st->interp_qlpc[i]; |
| tmp = -tmp; |
| st->pi_gain[sub]+=st->interp_qlpc[i]; |
| } |
| rl = low_pi_gain[sub]; |
| rl=1/(fabs(rl)+.01); |
| rh=1/(fabs(rh)+.01); |
| /* Compute ratio, will help predict the gain */ |
| filter_ratio=fabs(.01+rh)/(.01+fabs(rl)); |
| |
| fold = filter_ratio<5; |
| /*printf ("filter_ratio %f\n", filter_ratio);*/ |
| fold=0; |
| |
| /* 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 */ |
| for (i=0;i<st->subframeSize;i++) |
| eh+=sqr(exc[i]); |
| |
| if (!SUBMODE(innovation_quant)) {/* 1 for spectral folding excitation, 0 for stochastic */ |
| float g; |
| /*speex_bits_pack(bits, 1, 1);*/ |
| for (i=0;i<st->subframeSize;i++) |
| el+=sqr(low_innov[offset+i]); |
| |
| /* Gain to use if we want to use the low-band excitation for high-band */ |
| g=eh/(.01+el); |
| g=sqrt(g); |
| |
| g *= filter_ratio; |
| |
| /* Gain quantization */ |
| { |
| int quant = (int) floor(.5 + 27 + 8.0 * log((g+.0001))); |
| if (quant<0) |
| quant=0; |
| if (quant>31) |
| quant=31; |
| speex_bits_pack(bits, quant, 5); |
| g= .1*exp(quant/9.4); |
| } |
| /*printf ("folding gain: %f\n", g);*/ |
| g /= filter_ratio; |
| |
| } else { |
| float gc, scale, scale_1; |
| |
| for (i=0;i<st->subframeSize;i++) |
| el+=sqr(low_exc[offset+i]); |
| /*speex_bits_pack(bits, 0, 1);*/ |
| |
| gc = sqrt(1+eh)*filter_ratio/sqrt((1+el)*st->subframeSize); |
| { |
| int qgc = (int)floor(.5+3.7*(log(gc)+2)); |
| if (qgc<0) |
| qgc=0; |
| if (qgc>15) |
| qgc=15; |
| speex_bits_pack(bits, qgc, 4); |
| gc = exp((1/3.7)*qgc-2); |
| } |
| |
| scale = gc*sqrt(1+el)/filter_ratio; |
| scale_1 = 1/scale; |
| if (0 && rand()%5==0) |
| { |
| float sc = 1/sqrt(.1+eh/st->subframeSize); |
| if (rand()&1) |
| sc=-sc; |
| for (i=0;i<st->subframeSize;i++) |
| { |
| float tmp=exc[i]*sc; |
| if (i%8==0) |
| printf ("\nhexc"); |
| printf (" %f", tmp); |
| } |
| } |
| |
| for (i=0;i<st->subframeSize;i++) |
| exc[i]=0; |
| exc[0]=1; |
| syn_percep_zero(exc, 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]=0; |
| |
| /* 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; |
| |
| |
| for (i=0;i<st->subframeSize;i++) |
| target[i]*=scale_1; |
| |
| /* 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); |
| /*print_vec(target, st->subframeSize, "after");*/ |
| |
| for (i=0;i<st->subframeSize;i++) |
| exc[i] += innov[i]*scale; |
| |
| if (SUBMODE(double_codebook)) { |
| void *tmp_stack=stack; |
| float *innov2 = PUSH(tmp_stack, st->subframeSize, float); |
| 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, tmp_stack, (st->complexity+1)>>1); |
| for (i=0;i<st->subframeSize;i++) |
| innov2[i]*=scale*(1/2.5); |
| for (i=0;i<st->subframeSize;i++) |
| exc[i] += innov2[i]; |
| } |
| |
| |
| if (0) { |
| float en=0; |
| for (i=0;i<st->subframeSize;i++) |
| en+=exc[i]*exc[i]; |
| en=sqrt(eh/(1+en)); |
| for (i=0;i<st->subframeSize;i++) |
| exc[i]*=en; |
| printf ("correction high: %f\n", en); |
| } |
| |
| } |
| |
| /*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); |
| } |
| |
| |
| #ifndef RELEASE |
| |
| /* 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]=2*(st->y0[i]-st->y1[i]); |
| #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; |
| } |
| |
| |
| |
| |
| |
| void *sb_decoder_init(SpeexMode *m) |
| { |
| SBDecState *st; |
| SpeexSBMode *mode; |
| st = (SBDecState*)speex_alloc(sizeof(SBDecState)); |
| st->mode = m; |
| mode=(SpeexSBMode*)m->mode; |
| |
| 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=8; |
| 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->stack = speex_alloc(2000*sizeof(float)); |
| |
| st->x0d=(float*)speex_alloc(st->frame_size*sizeof(float)); |
| st->x1d=(float*)speex_alloc(st->frame_size*sizeof(float)); |
| st->high=(float*)speex_alloc(st->full_frame_size*sizeof(float)); |
| st->y0=(float*)speex_alloc(st->full_frame_size*sizeof(float)); |
| st->y1=(float*)speex_alloc(st->full_frame_size*sizeof(float)); |
| |
| st->h0_mem=(float*)speex_alloc(QMF_ORDER*sizeof(float)); |
| st->h1_mem=(float*)speex_alloc(QMF_ORDER*sizeof(float)); |
| st->g0_mem=(float*)speex_alloc(QMF_ORDER*sizeof(float)); |
| st->g1_mem=(float*)speex_alloc(QMF_ORDER*sizeof(float)); |
| |
| st->exc=(float*)speex_alloc(st->frame_size*sizeof(float)); |
| |
| st->qlsp = (float*)speex_alloc(st->lpcSize*sizeof(float)); |
| st->old_qlsp = (float*)speex_alloc(st->lpcSize*sizeof(float)); |
| st->interp_qlsp = (float*)speex_alloc(st->lpcSize*sizeof(float)); |
| st->interp_qlpc = (float*)speex_alloc((st->lpcSize+1)*sizeof(float)); |
| |
| st->pi_gain = (float*)speex_alloc(st->nbSubframes*sizeof(float)); |
| st->mem_sp = (float*)speex_alloc(2*st->lpcSize*sizeof(float)); |
| |
| st->lpc_enh_enabled=0; |
| |
| return st; |
| } |
| |
| void sb_decoder_destroy(void *state) |
| { |
| SBDecState *st; |
| st = (SBDecState*)state; |
| speex_decoder_destroy(st->st_low); |
| speex_free(st->x0d); |
| speex_free(st->x1d); |
| speex_free(st->high); |
| speex_free(st->y0); |
| speex_free(st->y1); |
| speex_free(st->h0_mem); |
| speex_free(st->h1_mem); |
| speex_free(st->g0_mem); |
| speex_free(st->g1_mem); |
| |
| speex_free(st->exc); |
| speex_free(st->qlsp); |
| speex_free(st->old_qlsp); |
| speex_free(st->interp_qlsp); |
| speex_free(st->interp_qlpc); |
| speex_free(st->pi_gain); |
| |
| speex_free(st->mem_sp); |
| |
| speex_free(st->stack); |
| |
| speex_free(state); |
| } |
| |
| static void sb_decode_lost(SBDecState *st, float *out, void *stack) |
| { |
| int i; |
| float *awk1, *awk2, *awk3; |
| for (i=0;i<st->frame_size;i++) |
| st->exc[i]*=0.8; |
| |
| st->first=1; |
| |
| awk1=PUSH(stack, st->lpcSize+1, float); |
| awk2=PUSH(stack, st->lpcSize+1, float); |
| awk3=PUSH(stack, st->lpcSize+1, float); |
| |
| if (st->lpc_enh_enabled) |
| { |
| float r=.9; |
| |
| float k1,k2,k3; |
| k1=SUBMODE(lpc_enh_k1); |
| k2=SUBMODE(lpc_enh_k2); |
| k3=(1-(1-r*k1)/(1-r*k2))/r; |
| k3=k1-k2; |
| if (!st->lpc_enh_enabled) |
| { |
| k1=k2; |
| 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 */ |
| 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); |
| |
| for (i=0;i<st->full_frame_size;i++) |
| out[i]=2*(st->y0[i]-st->y1[i]); |
| |
| return; |
| } |
| |
| int sb_decode(void *state, SpeexBits *bits, float *out) |
| { |
| int i, sub; |
| SBDecState *st; |
| int wideband; |
| int ret; |
| void *stack; |
| float *low_pi_gain, *low_exc, *low_innov; |
| float *awk1, *awk2, *awk3; |
| |
| st = (SBDecState*)state; |
| stack=st->stack; |
| |
| /* Decode the low-band */ |
| ret = speex_decode(st->st_low, bits, st->x0d); |
| |
| /* If error decoding the narrowband part, propagate error */ |
| if (ret!=0) |
| { |
| return ret; |
| } |
| |
| if (!bits) |
| { |
| sb_decode_lost(st, out, stack); |
| return 0; |
| } |
| |
| /*Check "wideband bit"*/ |
| wideband = speex_bits_peek(bits); |
| 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; |
| } |
| |
| for (i=0;i<st->frame_size;i++) |
| st->exc[i]=0; |
| |
| /* If null mode (no transmission), just set a couple things to zero*/ |
| if (st->submodes[st->submodeID] == NULL) |
| { |
| for (i=0;i<st->frame_size;i++) |
| st->exc[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); |
| |
| 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++) |
| out[i]=2*(st->y0[i]-st->y1[i]); |
| |
| return 0; |
| |
| } |
| |
| low_pi_gain = PUSH(stack, st->nbSubframes, float); |
| low_exc = PUSH(stack, st->frame_size, float); |
| low_innov = PUSH(stack, st->frame_size, float); |
| 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]; |
| } |
| |
| awk1=PUSH(stack, st->lpcSize+1, float); |
| awk2=PUSH(stack, st->lpcSize+1, float); |
| awk3=PUSH(stack, st->lpcSize+1, float); |
| |
| for (sub=0;sub<st->nbSubframes;sub++) |
| { |
| float *exc, *sp, tmp, filter_ratio, el=0; |
| int offset; |
| float rl=0,rh=0; |
| |
| offset = st->subframeSize*sub; |
| sp=st->high+offset; |
| exc=st->exc+offset; |
| |
| /* LSP interpolation */ |
| tmp = (1.0 + sub)/st->nbSubframes; |
| for (i=0;i<st->lpcSize;i++) |
| st->interp_qlsp[i] = (1-tmp)*st->old_qlsp[i] + tmp*st->qlsp[i]; |
| |
| /* LSPs to x-domain */ |
| for (i=0;i<st->lpcSize;i++) |
| st->interp_qlsp[i] = cos(st->interp_qlsp[i]); |
| |
| lsp_enforce_margin(st->interp_qlsp, st->lpcSize, .002); |
| |
| /* LSP to LPC */ |
| lsp_to_lpc(st->interp_qlsp, st->interp_qlpc, st->lpcSize, stack); |
| |
| |
| if (st->lpc_enh_enabled) |
| { |
| float r=.9; |
| |
| float k1,k2,k3; |
| k1=SUBMODE(lpc_enh_k1); |
| k2=SUBMODE(lpc_enh_k2); |
| k3=(1-(1-r*k1)/(1-r*k2))/r; |
| k3=k1-k2; |
| if (!st->lpc_enh_enabled) |
| { |
| k1=k2; |
| 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);*/ |
| } |
| |
| |
| /* Calculate reponse ratio between the low and high filter in the middle |
| of the band (4000 Hz) */ |
| |
| tmp=1; |
| st->pi_gain[sub]=0; |
| for (i=0;i<=st->lpcSize;i++) |
| { |
| rh += tmp*st->interp_qlpc[i]; |
| tmp = -tmp; |
| st->pi_gain[sub]+=st->interp_qlpc[i]; |
| } |
| rl = low_pi_gain[sub]; |
| rl=1/(fabs(rl)+.01); |
| rh=1/(fabs(rh)+.01); |
| filter_ratio=fabs(.01+rh)/(.01+fabs(rl)); |
| |
| |
| for (i=0;i<st->subframeSize;i++) |
| exc[i]=0; |
| if (!SUBMODE(innovation_unquant)) |
| { |
| float g; |
| int quant; |
| |
| for (i=0;i<st->subframeSize;i++) |
| el+=sqr(low_innov[offset+i]); |
| quant = speex_bits_unpack_unsigned(bits, 5); |
| g= exp(((float)quant-27)/8.0); |
| |
| /*printf ("unquant folding gain: %f\n", g);*/ |
| g /= filter_ratio; |
| |
| /* High-band excitation using the low-band excitation and a gain */ |
| for (i=0;i<st->subframeSize;i++) |
| exc[i]=.8*g*low_innov[offset+i]; |
| } else { |
| float gc, scale; |
| int qgc = speex_bits_unpack_unsigned(bits, 4); |
| for (i=0;i<st->subframeSize;i++) |
| el+=sqr(low_exc[offset+i]); |
| |
| |
| gc = exp((1/3.7)*qgc-2); |
| |
| scale = gc*sqrt(1+el)/filter_ratio; |
| |
| |
| SUBMODE(innovation_unquant)(exc, SUBMODE(innovation_params), st->subframeSize, |
| bits, stack); |
| for (i=0;i<st->subframeSize;i++) |
| exc[i]*=scale; |
| |
| if (SUBMODE(double_codebook)) { |
| void *tmp_stack=stack; |
| float *innov2 = PUSH(tmp_stack, st->subframeSize, float); |
| for (i=0;i<st->subframeSize;i++) |
| innov2[i]=0; |
| SUBMODE(innovation_unquant)(innov2, SUBMODE(innovation_params), st->subframeSize, |
| bits, tmp_stack); |
| for (i=0;i<st->subframeSize;i++) |
| innov2[i]*=scale*(1/2.5); |
| for (i=0;i<st->subframeSize;i++) |
| exc[i] += innov2[i]; |
| } |
| |
| } |
| |
| 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); |
| |
| for (i=0;i<st->full_frame_size;i++) |
| out[i]=2*(st->y0[i]-st->y1[i]); |
| |
| for (i=0;i<st->lpcSize;i++) |
| st->old_qlsp[i] = st->qlsp[i]; |
| |
| st->first=0; |
| |
| return 0; |
| } |
| |
| |
| void 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_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)+.5; |
| 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_QUALITY: |
| { |
| int nb_qual; |
| int quality = (*(int*)ptr); |
| if (quality < 0) |
| quality = 0; |
| if (quality > 10) |
| quality = 10; |
| st->submodeSelect = st->submodeID = ((SpeexSBMode*)(st->mode->mode))->quality_map[quality]; |
| nb_qual = ((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>=1) |
| { |
| 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_GET_PI_GAIN: |
| { |
| int i; |
| float *g = (float*)ptr; |
| for (i=0;i<st->nbSubframes;i++) |
| g[i]=st->pi_gain[i]; |
| } |
| break; |
| case SPEEX_GET_EXC: |
| { |
| int i; |
| float *e = (float*)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; |
| float *e = (float*)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: |
| fprintf(stderr, "Unknown nb_ctl request: %d\n", request); |
| } |
| |
| } |
| |
| void sb_decoder_ctl(void *state, int request, void *ptr) |
| { |
| SBDecState *st; |
| st=(SBDecState*)state; |
| switch(request) |
| { |
| 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_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->h0_mem[i]=st->h1_mem[i]=st->g0_mem[i]=st->g1_mem[i]=0; |
| } |
| break; |
| case SPEEX_GET_PI_GAIN: |
| { |
| int i; |
| float *g = (float*)ptr; |
| for (i=0;i<st->nbSubframes;i++) |
| g[i]=st->pi_gain[i]; |
| } |
| break; |
| case SPEEX_GET_EXC: |
| { |
| int i; |
| float *e = (float*)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; |
| float *e = (float*)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; |
| default: |
| fprintf(stderr, "Unknown sb_ctl request: %d\n", request); |
| } |
| |
| } |
