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Diffstat (limited to 'src/libspeex/nb_celp.c')
| -rw-r--r-- | src/libspeex/nb_celp.c | 1903 |
1 files changed, 1903 insertions, 0 deletions
diff --git a/src/libspeex/nb_celp.c b/src/libspeex/nb_celp.c new file mode 100644 index 0000000..9dd726a --- /dev/null +++ b/src/libspeex/nb_celp.c @@ -0,0 +1,1903 @@ +/* Copyright (C) 2002-2006 Jean-Marc Valin + File: nb_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. +*/ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <math.h> +#include "nb_celp.h" +#include "lpc.h" +#include "lsp.h" +#include "ltp.h" +#include "quant_lsp.h" +#include "cb_search.h" +#include "filters.h" +#include "stack_alloc.h" +#include "vq.h" +#include <speex/speex_bits.h> +#include "vbr.h" +#include "arch.h" +#include "math_approx.h" +#include "os_support.h" +#include <speex/speex_callbacks.h> + +#ifdef VORBIS_PSYCHO +#include "vorbis_psy.h" +#endif + +#ifndef M_PI +#define M_PI 3.14159265358979323846 /* pi */ +#endif + +#ifndef NULL +#define NULL 0 +#endif + +#define SUBMODE(x) st->submodes[st->submodeID]->x + +/* Default size for the encoder and decoder stack (can be changed at compile time). + This does not apply when using variable-size arrays or alloca. */ +#ifndef NB_ENC_STACK +#define NB_ENC_STACK (8000*sizeof(spx_sig_t)) +#endif + +#ifndef NB_DEC_STACK +#define NB_DEC_STACK (4000*sizeof(spx_sig_t)) +#endif + + +#ifdef FIXED_POINT +const spx_word32_t ol_gain_table[32]={18900, 25150, 33468, 44536, 59265, 78865, 104946, 139653, 185838, 247297, 329081, 437913, 582736, 775454, 1031906, 1373169, 1827293, 2431601, 3235761, 4305867, 5729870, 7624808, 10146425, 13501971, 17967238, 23909222, 31816294, 42338330, 56340132, 74972501, 99766822, 132760927}; +const spx_word16_t exc_gain_quant_scal3_bound[7]={1841, 3883, 6051, 8062, 10444, 13580, 18560}; +const spx_word16_t exc_gain_quant_scal3[8]={1002, 2680, 5086, 7016, 9108, 11781, 15380, 21740}; +const spx_word16_t exc_gain_quant_scal1_bound[1]={14385}; +const spx_word16_t exc_gain_quant_scal1[2]={11546, 17224}; + +#define LSP_MARGIN 16 +#define LSP_DELTA1 6553 +#define LSP_DELTA2 1638 + +#else + +const float exc_gain_quant_scal3_bound[7]={0.112338f, 0.236980f, 0.369316f, 0.492054f, 0.637471f, 0.828874f, 1.132784f}; +const float exc_gain_quant_scal3[8]={0.061130f, 0.163546f, 0.310413f, 0.428220f, 0.555887f, 0.719055f, 0.938694f, 1.326874f}; +const float exc_gain_quant_scal1_bound[1]={0.87798f}; +const float exc_gain_quant_scal1[2]={0.70469f, 1.05127f}; + +#define LSP_MARGIN .002f +#define LSP_DELTA1 .2f +#define LSP_DELTA2 .05f + +#endif + +#ifdef VORBIS_PSYCHO +#define EXTRA_BUFFER 100 +#else +#define EXTRA_BUFFER 0 +#endif + + +#define sqr(x) ((x)*(x)) + +extern const spx_word16_t lag_window[]; +extern const spx_word16_t lpc_window[]; + +void *nb_encoder_init(const SpeexMode *m) +{ + EncState *st; + const SpeexNBMode *mode; + int i; + + mode=(const SpeexNBMode *)m->mode; + st = (EncState*)speex_alloc(sizeof(EncState)); + if (!st) + return NULL; +#if defined(VAR_ARRAYS) || defined (USE_ALLOCA) + st->stack = NULL; +#else + st->stack = (char*)speex_alloc_scratch(NB_ENC_STACK); +#endif + + st->mode=m; + + st->frameSize = mode->frameSize; + st->nbSubframes=mode->frameSize/mode->subframeSize; + st->subframeSize=mode->subframeSize; + st->windowSize = st->frameSize+st->subframeSize; + st->lpcSize = mode->lpcSize; + st->gamma1=mode->gamma1; + st->gamma2=mode->gamma2; + st->min_pitch=mode->pitchStart; + st->max_pitch=mode->pitchEnd; + st->lpc_floor = mode->lpc_floor; + + st->submodes=mode->submodes; + st->submodeID=st->submodeSelect=mode->defaultSubmode; + st->bounded_pitch = 1; + + st->encode_submode = 1; + +#ifdef VORBIS_PSYCHO + st->psy = vorbis_psy_init(8000, 256); + st->curve = (float*)speex_alloc(128*sizeof(float)); + st->old_curve = (float*)speex_alloc(128*sizeof(float)); + st->psy_window = (float*)speex_alloc(256*sizeof(float)); +#endif + + st->cumul_gain = 1024; + + /* Allocating input buffer */ + st->winBuf = (spx_word16_t*)speex_alloc((st->windowSize-st->frameSize)*sizeof(spx_word16_t)); + /* Allocating excitation buffer */ + st->excBuf = (spx_word16_t*)speex_alloc((mode->frameSize+mode->pitchEnd+2)*sizeof(spx_word16_t)); + st->exc = st->excBuf + mode->pitchEnd + 2; + st->swBuf = (spx_word16_t*)speex_alloc((mode->frameSize+mode->pitchEnd+2)*sizeof(spx_word16_t)); + st->sw = st->swBuf + mode->pitchEnd + 2; + + st->window= lpc_window; + + /* Create the window for autocorrelation (lag-windowing) */ + st->lagWindow = lag_window; + + st->old_lsp = (spx_lsp_t*)speex_alloc((st->lpcSize)*sizeof(spx_lsp_t)); + st->old_qlsp = (spx_lsp_t*)speex_alloc((st->lpcSize)*sizeof(spx_lsp_t)); + st->first = 1; + for (i=0;i<st->lpcSize;i++) + st->old_lsp[i]= DIV32(MULT16_16(QCONST16(3.1415927f, LSP_SHIFT), i+1), st->lpcSize+1); + + st->mem_sp = (spx_mem_t*)speex_alloc((st->lpcSize)*sizeof(spx_mem_t)); + st->mem_sw = (spx_mem_t*)speex_alloc((st->lpcSize)*sizeof(spx_mem_t)); + st->mem_sw_whole = (spx_mem_t*)speex_alloc((st->lpcSize)*sizeof(spx_mem_t)); + st->mem_exc = (spx_mem_t*)speex_alloc((st->lpcSize)*sizeof(spx_mem_t)); + st->mem_exc2 = (spx_mem_t*)speex_alloc((st->lpcSize)*sizeof(spx_mem_t)); + + st->pi_gain = (spx_word32_t*)speex_alloc((st->nbSubframes)*sizeof(spx_word32_t)); + st->innov_rms_save = NULL; + + st->pitch = (int*)speex_alloc((st->nbSubframes)*sizeof(int)); + +#ifndef DISABLE_VBR + st->vbr = (VBRState*)speex_alloc(sizeof(VBRState)); + vbr_init(st->vbr); + st->vbr_quality = 8; + st->vbr_enabled = 0; + st->vbr_max = 0; + st->vad_enabled = 0; + st->dtx_enabled = 0; + st->dtx_count=0; + st->abr_enabled = 0; + st->abr_drift = 0; + st->abr_drift2 = 0; +#endif /* #ifndef DISABLE_VBR */ + + st->plc_tuning = 2; + st->complexity=2; + st->sampling_rate=8000; + st->isWideband = 0; + st->highpass_enabled = 1; + +#ifdef ENABLE_VALGRIND + VALGRIND_MAKE_READABLE(st, NB_ENC_STACK); +#endif + return st; +} + +void nb_encoder_destroy(void *state) +{ + EncState *st=(EncState *)state; + /* Free all allocated memory */ +#if !(defined(VAR_ARRAYS) || defined (USE_ALLOCA)) + speex_free_scratch(st->stack); +#endif + + speex_free (st->winBuf); + speex_free (st->excBuf); + speex_free (st->old_qlsp); + speex_free (st->swBuf); + + speex_free (st->old_lsp); + speex_free (st->mem_sp); + speex_free (st->mem_sw); + speex_free (st->mem_sw_whole); + speex_free (st->mem_exc); + speex_free (st->mem_exc2); + speex_free (st->pi_gain); + speex_free (st->pitch); + +#ifndef DISABLE_VBR + vbr_destroy(st->vbr); + speex_free (st->vbr); +#endif /* #ifndef DISABLE_VBR */ + +#ifdef VORBIS_PSYCHO + vorbis_psy_destroy(st->psy); + speex_free (st->curve); + speex_free (st->old_curve); + speex_free (st->psy_window); +#endif + + /*Free state memory... should be last*/ + speex_free(st); +} + +int nb_encode(void *state, void *vin, SpeexBits *bits) +{ + EncState *st; + int i, sub, roots; + int ol_pitch; + spx_word16_t ol_pitch_coef; + spx_word32_t ol_gain; + VARDECL(spx_word16_t *ringing); + VARDECL(spx_word16_t *target); + VARDECL(spx_sig_t *innov); + VARDECL(spx_word32_t *exc32); + VARDECL(spx_mem_t *mem); + VARDECL(spx_coef_t *bw_lpc1); + VARDECL(spx_coef_t *bw_lpc2); + VARDECL(spx_coef_t *lpc); + VARDECL(spx_lsp_t *lsp); + VARDECL(spx_lsp_t *qlsp); + VARDECL(spx_lsp_t *interp_lsp); + VARDECL(spx_lsp_t *interp_qlsp); + VARDECL(spx_coef_t *interp_lpc); + VARDECL(spx_coef_t *interp_qlpc); + char *stack; + VARDECL(spx_word16_t *syn_resp); + VARDECL(spx_word16_t *real_exc); + + spx_word32_t ener=0; + spx_word16_t fine_gain; + spx_word16_t *in = (spx_word16_t*)vin; + + st=(EncState *)state; + stack=st->stack; + + ALLOC(lpc, st->lpcSize, spx_coef_t); + ALLOC(bw_lpc1, st->lpcSize, spx_coef_t); + ALLOC(bw_lpc2, st->lpcSize, spx_coef_t); + ALLOC(lsp, st->lpcSize, spx_lsp_t); + ALLOC(qlsp, st->lpcSize, spx_lsp_t); + ALLOC(interp_lsp, st->lpcSize, spx_lsp_t); + ALLOC(interp_qlsp, st->lpcSize, spx_lsp_t); + ALLOC(interp_lpc, st->lpcSize, spx_coef_t); + ALLOC(interp_qlpc, st->lpcSize, spx_coef_t); + + /* Move signals 1 frame towards the past */ + SPEEX_MOVE(st->excBuf, st->excBuf+st->frameSize, st->max_pitch+2); + SPEEX_MOVE(st->swBuf, st->swBuf+st->frameSize, st->max_pitch+2); + + if (st->highpass_enabled) + highpass(in, in, st->frameSize, (st->isWideband?HIGHPASS_WIDEBAND:HIGHPASS_NARROWBAND)|HIGHPASS_INPUT, st->mem_hp); + + { + VARDECL(spx_word16_t *w_sig); + VARDECL(spx_word16_t *autocorr); + ALLOC(w_sig, st->windowSize, spx_word16_t); + ALLOC(autocorr, st->lpcSize+1, spx_word16_t); + /* Window for analysis */ + for (i=0;i<st->windowSize-st->frameSize;i++) + w_sig[i] = EXTRACT16(SHR32(MULT16_16(st->winBuf[i],st->window[i]),SIG_SHIFT)); + for (;i<st->windowSize;i++) + w_sig[i] = EXTRACT16(SHR32(MULT16_16(in[i-st->windowSize+st->frameSize],st->window[i]),SIG_SHIFT)); + /* Compute auto-correlation */ + _spx_autocorr(w_sig, autocorr, st->lpcSize+1, st->windowSize); + autocorr[0] = ADD16(autocorr[0],MULT16_16_Q15(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++) + autocorr[i] = MULT16_16_Q14(autocorr[i],st->lagWindow[i]); + + /* Levinson-Durbin */ + _spx_lpc(lpc, autocorr, st->lpcSize); + /* LPC to LSPs (x-domain) transform */ + roots=lpc_to_lsp (lpc, st->lpcSize, lsp, 10, LSP_DELTA1, stack); + /* Check if we found all the roots */ + if (roots!=st->lpcSize) + { + /*If we can't find all LSP's, do some damage control and use previous filter*/ + for (i=0;i<st->lpcSize;i++) + { + lsp[i]=st->old_lsp[i]; + } + } + } + + + + + /* Whole frame analysis (open-loop estimation of pitch and excitation gain) */ + { + int diff = st->windowSize-st->frameSize; + if (st->first) + for (i=0;i<st->lpcSize;i++) + interp_lsp[i] = lsp[i]; + else + lsp_interpolate(st->old_lsp, lsp, interp_lsp, st->lpcSize, st->nbSubframes, st->nbSubframes<<1); + + lsp_enforce_margin(interp_lsp, st->lpcSize, LSP_MARGIN); + + /* Compute interpolated LPCs (unquantized) for whole frame*/ + lsp_to_lpc(interp_lsp, interp_lpc, st->lpcSize,stack); + + + /*Open-loop pitch*/ + if (!st->submodes[st->submodeID] || (st->complexity>2 && SUBMODE(have_subframe_gain)<3) || SUBMODE(forced_pitch_gain) || SUBMODE(lbr_pitch) != -1 +#ifndef DISABLE_VBR + || st->vbr_enabled || st->vad_enabled +#endif + ) + { + int nol_pitch[6]; + spx_word16_t nol_pitch_coef[6]; + + bw_lpc(st->gamma1, interp_lpc, bw_lpc1, st->lpcSize); + bw_lpc(st->gamma2, interp_lpc, bw_lpc2, st->lpcSize); + + SPEEX_COPY(st->sw, st->winBuf, diff); + SPEEX_COPY(st->sw+diff, in, st->frameSize-diff); + filter_mem16(st->sw, bw_lpc1, bw_lpc2, st->sw, st->frameSize, st->lpcSize, st->mem_sw_whole, stack); + + open_loop_nbest_pitch(st->sw, st->min_pitch, st->max_pitch, st->frameSize, + nol_pitch, nol_pitch_coef, 6, stack); + ol_pitch=nol_pitch[0]; + ol_pitch_coef = nol_pitch_coef[0]; + /*Try to remove pitch multiples*/ + for (i=1;i<6;i++) + { +#ifdef FIXED_POINT + if ((nol_pitch_coef[i]>MULT16_16_Q15(nol_pitch_coef[0],27853)) && +#else + if ((nol_pitch_coef[i]>.85*nol_pitch_coef[0]) && +#endif + (ABS(2*nol_pitch[i]-ol_pitch)<=2 || ABS(3*nol_pitch[i]-ol_pitch)<=3 || + ABS(4*nol_pitch[i]-ol_pitch)<=4 || ABS(5*nol_pitch[i]-ol_pitch)<=5)) + { + /*ol_pitch_coef=nol_pitch_coef[i];*/ + ol_pitch = nol_pitch[i]; + } + } + /*if (ol_pitch>50) + ol_pitch/=2;*/ + /*ol_pitch_coef = sqrt(ol_pitch_coef);*/ + + } else { + ol_pitch=0; + ol_pitch_coef=0; + } + + /*Compute "real" excitation*/ + SPEEX_COPY(st->exc, st->winBuf, diff); + SPEEX_COPY(st->exc+diff, in, st->frameSize-diff); + fir_mem16(st->exc, interp_lpc, st->exc, st->frameSize, st->lpcSize, st->mem_exc, stack); + + /* Compute open-loop excitation gain */ + { + spx_word16_t g = compute_rms16(st->exc, st->frameSize); + if (st->submodeID!=1 && ol_pitch>0) + ol_gain = MULT16_16(g, MULT16_16_Q14(QCONST16(1.1,14), + spx_sqrt(QCONST32(1.,28)-MULT16_32_Q15(QCONST16(.8,15),SHL32(MULT16_16(ol_pitch_coef,ol_pitch_coef),16))))); + else + ol_gain = SHL32(EXTEND32(g),SIG_SHIFT); + } + } + +#ifdef VORBIS_PSYCHO + SPEEX_MOVE(st->psy_window, st->psy_window+st->frameSize, 256-st->frameSize); + SPEEX_COPY(&st->psy_window[256-st->frameSize], in, st->frameSize); + compute_curve(st->psy, st->psy_window, st->curve); + /*print_vec(st->curve, 128, "curve");*/ + if (st->first) + SPEEX_COPY(st->old_curve, st->curve, 128); +#endif + + /*VBR stuff*/ +#ifndef DISABLE_VBR + if (st->vbr && (st->vbr_enabled||st->vad_enabled)) + { + float lsp_dist=0; + for (i=0;i<st->lpcSize;i++) + lsp_dist += (st->old_lsp[i] - lsp[i])*(st->old_lsp[i] - lsp[i]); + lsp_dist /= LSP_SCALING*LSP_SCALING; + + 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>.05) + qual_change=.05; + if (qual_change<-.05) + qual_change=-.05; + } + st->vbr_quality += qual_change; + if (st->vbr_quality>10) + st->vbr_quality=10; + if (st->vbr_quality<0) + st->vbr_quality=0; + } + + st->relative_quality = vbr_analysis(st->vbr, in, st->frameSize, ol_pitch, GAIN_SCALING_1*ol_pitch_coef); + /*if (delta_qual<0)*/ + /* delta_qual*=.1*(3+st->vbr_quality);*/ + if (st->vbr_enabled) + { + spx_int32_t mode; + int choice=0; + float min_diff=100; + mode = 8; + while (mode) + { + int v1; + float thresh; + v1=(int)floor(st->vbr_quality); + if (v1==10) + thresh = vbr_nb_thresh[mode][v1]; + else + thresh = (st->vbr_quality-v1)*vbr_nb_thresh[mode][v1+1] + (1+v1-st->vbr_quality)*vbr_nb_thresh[mode][v1]; + if (st->relative_quality > thresh && + st->relative_quality-thresh<min_diff) + { + choice = mode; + min_diff = st->relative_quality-thresh; + } + mode--; + } + mode=choice; + if (mode==0) + { + if (st->dtx_count==0 || lsp_dist>.05 || !st->dtx_enabled || st->dtx_count>20) + { + mode=1; + st->dtx_count=1; + } else { + mode=0; + st->dtx_count++; + } + } else { + st->dtx_count=0; + } + + speex_encoder_ctl(state, SPEEX_SET_MODE, &mode); + if (st->vbr_max>0) + { + spx_int32_t rate; + speex_encoder_ctl(state, SPEEX_GET_BITRATE, &rate); + if (rate > st->vbr_max) + { + rate = st->vbr_max; + speex_encoder_ctl(state, SPEEX_SET_BITRATE, &rate); + } + } + + if (st->abr_enabled) + { + spx_int32_t 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 case*/ + int mode; + if (st->relative_quality<2) + { + if (st->dtx_count==0 || lsp_dist>.05 || !st->dtx_enabled || st->dtx_count>20) + { + st->dtx_count=1; + mode=1; + } else { + mode=0; + st->dtx_count++; + } + } else { + st->dtx_count = 0; + mode=st->submodeSelect; + } + /*speex_encoder_ctl(state, SPEEX_SET_MODE, &mode);*/ + st->submodeID=mode; + } + } else { + st->relative_quality = -1; + } +#endif /* #ifndef DISABLE_VBR */ + + if (st->encode_submode) + { + /* First, transmit a zero for narrowband */ + speex_bits_pack(bits, 0, 1); + + /* Transmit the sub-mode we use for this frame */ + speex_bits_pack(bits, st->submodeID, NB_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->frameSize;i++) + st->exc[i]=st->sw[i]=VERY_SMALL; + + for (i=0;i<st->lpcSize;i++) + st->mem_sw[i]=0; + st->first=1; + st->bounded_pitch = 1; + + SPEEX_COPY(st->winBuf, in+2*st->frameSize-st->windowSize, st->windowSize-st->frameSize); + + /* Clear memory (no need to really compute it) */ + for (i=0;i<st->lpcSize;i++) + st->mem_sp[i] = 0; + return 0; + + } + + /* LSP Quantization */ + if (st->first) + { + for (i=0;i<st->lpcSize;i++) + st->old_lsp[i] = lsp[i]; + } + + + /*Quantize LSPs*/ +#if 1 /*0 for unquantized*/ + SUBMODE(lsp_quant)(lsp, qlsp, st->lpcSize, bits); +#else + for (i=0;i<st->lpcSize;i++) + qlsp[i]=lsp[i]; +#endif + + /*If we use low bit-rate pitch mode, transmit open-loop pitch*/ + if (SUBMODE(lbr_pitch)!=-1) + { + speex_bits_pack(bits, ol_pitch-st->min_pitch, 7); + } + + if (SUBMODE(forced_pitch_gain)) + { + int quant; + /* This just damps the pitch a bit, because it tends to be too aggressive when forced */ + ol_pitch_coef = MULT16_16_Q15(QCONST16(.9,15), ol_pitch_coef); +#ifdef FIXED_POINT + quant = PSHR16(MULT16_16_16(15, ol_pitch_coef),GAIN_SHIFT); +#else + quant = (int)floor(.5+15*ol_pitch_coef*GAIN_SCALING_1); +#endif + if (quant>15) + quant=15; + if (quant<0) + quant=0; + speex_bits_pack(bits, quant, 4); + ol_pitch_coef=MULT16_16_P15(QCONST16(0.066667,15),SHL16(quant,GAIN_SHIFT)); + } + + + /*Quantize and transmit open-loop excitation gain*/ +#ifdef FIXED_POINT + { + int qe = scal_quant32(ol_gain, ol_gain_table, 32); + /*ol_gain = exp(qe/3.5)*SIG_SCALING;*/ + ol_gain = MULT16_32_Q15(28406,ol_gain_table[qe]); + speex_bits_pack(bits, qe, 5); + } +#else + { + int qe = (int)(floor(.5+3.5*log(ol_gain*1.0/SIG_SCALING))); + if (qe<0) + qe=0; + if (qe>31) + qe=31; + ol_gain = exp(qe/3.5)*SIG_SCALING; + speex_bits_pack(bits, qe, 5); + } +#endif + + + + /* Special case for first frame */ + if (st->first) + { + for (i=0;i<st->lpcSize;i++) + st->old_qlsp[i] = qlsp[i]; + } + + /* Target signal */ + ALLOC(target, st->subframeSize, spx_word16_t); + ALLOC(innov, st->subframeSize, spx_sig_t); + ALLOC(exc32, st->subframeSize, spx_word32_t); + ALLOC(ringing, st->subframeSize, spx_word16_t); + ALLOC(syn_resp, st->subframeSize, spx_word16_t); + ALLOC(real_exc, st->subframeSize, spx_word16_t); + ALLOC(mem, st->lpcSize, spx_mem_t); + + /* Loop on sub-frames */ + for (sub=0;sub<st->nbSubframes;sub++) + { + int offset; + spx_word16_t *sw; + spx_word16_t *exc; + int pitch; + int response_bound = st->subframeSize; + + /* Offset relative to start of frame */ + offset = st->subframeSize*sub; + /* Excitation */ + exc=st->exc+offset; + /* Weighted signal */ + sw=st->sw+offset; + + /* LSP interpolation (quantized and unquantized) */ + lsp_interpolate(st->old_lsp, lsp, interp_lsp, st->lpcSize, sub, st->nbSubframes); + lsp_interpolate(st->old_qlsp, qlsp, interp_qlsp, st->lpcSize, sub, st->nbSubframes); + + /* Make sure the filters are stable */ + lsp_enforce_margin(interp_lsp, st->lpcSize, LSP_MARGIN); + lsp_enforce_margin(interp_qlsp, st->lpcSize, LSP_MARGIN); + + /* Compute interpolated LPCs (quantized and unquantized) */ + lsp_to_lpc(interp_lsp, interp_lpc, st->lpcSize,stack); + + lsp_to_lpc(interp_qlsp, interp_qlpc, st->lpcSize, stack); + + /* Compute analysis filter gain at w=pi (for use in SB-CELP) */ + { + spx_word32_t pi_g=LPC_SCALING; + for (i=0;i<st->lpcSize;i+=2) + { + /*pi_g += -st->interp_qlpc[i] + st->interp_qlpc[i+1];*/ + pi_g = ADD32(pi_g, SUB32(EXTEND32(interp_qlpc[i+1]),EXTEND32(interp_qlpc[i]))); + } + st->pi_gain[sub] = pi_g; + } + +#ifdef VORBIS_PSYCHO + { + float curr_curve[128]; + float fact = ((float)sub+1.0f)/st->nbSubframes; + for (i=0;i<128;i++) + curr_curve[i] = (1.0f-fact)*st->old_curve[i] + fact*st->curve[i]; + curve_to_lpc(st->psy, curr_curve, bw_lpc1, bw_lpc2, 10); + } +#else + /* Compute bandwidth-expanded (unquantized) LPCs for perceptual weighting */ + bw_lpc(st->gamma1, interp_lpc, bw_lpc1, st->lpcSize); + if (st->gamma2>=0) + bw_lpc(st->gamma2, interp_lpc, bw_lpc2, st->lpcSize); + else + { + for (i=0;i<st->lpcSize;i++) + bw_lpc2[i]=0; + } + /*print_vec(st->bw_lpc1, 10, "bw_lpc");*/ +#endif + + /*FIXME: This will break if we change the window size */ + speex_assert(st->windowSize-st->frameSize == st->subframeSize); + if (sub==0) + { + for (i=0;i<st->subframeSize;i++) + real_exc[i] = sw[i] = st->winBuf[i]; + } else { + for (i=0;i<st->subframeSize;i++) + real_exc[i] = sw[i] = in[i+((sub-1)*st->subframeSize)]; + } + fir_mem16(real_exc, interp_qlpc, real_exc, st->subframeSize, st->lpcSize, st->mem_exc2, stack); + + if (st->complexity==0) + response_bound >>= 1; + compute_impulse_response(interp_qlpc, bw_lpc1, bw_lpc2, syn_resp, response_bound, st->lpcSize, stack); + for (i=response_bound;i<st->subframeSize;i++) + syn_resp[i]=VERY_SMALL; + + /* Compute zero response of A(z/g1) / ( A(z/g2) * A(z) ) */ + for (i=0;i<st->lpcSize;i++) + mem[i]=SHL32(st->mem_sp[i],1); + for (i=0;i<st->subframeSize;i++) + ringing[i] = VERY_SMALL; +#ifdef SHORTCUTS2 + iir_mem16(ringing, interp_qlpc, ringing, response_bound, st->lpcSize, mem, stack); + for (i=0;i<st->lpcSize;i++) + mem[i]=SHL32(st->mem_sw[i],1); + filter_mem16(ringing, st->bw_lpc1, st->bw_lpc2, ringing, response_bound, st->lpcSize, mem, stack); + SPEEX_MEMSET(&ringing[response_bound], 0, st->subframeSize-response_bound); +#else + iir_mem16(ringing, interp_qlpc, ringing, st->subframeSize, st->lpcSize, mem, stack); + for (i=0;i<st->lpcSize;i++) + mem[i]=SHL32(st->mem_sw[i],1); + filter_mem16(ringing, bw_lpc1, bw_lpc2, ringing, st->subframeSize, st->lpcSize, mem, stack); +#endif + + /* Compute weighted signal */ + for (i=0;i<st->lpcSize;i++) + mem[i]=st->mem_sw[i]; + filter_mem16(sw, bw_lpc1, bw_lpc2, sw, st->subframeSize, st->lpcSize, mem, stack); + + if (st->complexity==0) + for (i=0;i<st->lpcSize;i++) + st->mem_sw[i]=mem[i]; + + /* Compute target signal (saturation prevents overflows on clipped input speech) */ + for (i=0;i<st->subframeSize;i++) + target[i]=EXTRACT16(SATURATE(SUB32(sw[i],PSHR32(ringing[i],1)),32767)); + + /* Reset excitation */ + SPEEX_MEMSET(exc, 0, st->subframeSize); + + /* If we have a long-term predictor (otherwise, something's wrong) */ + speex_assert (SUBMODE(ltp_quant)); + { + int pit_min, pit_max; + /* Long-term prediction */ + if (SUBMODE(lbr_pitch) != -1) + { + /* Low bit-rate pitch handling */ + int margin; + margin = SUBMODE(lbr_pitch); + if (margin) + { + if (ol_pitch < st->min_pitch+margin-1) + ol_pitch=st->min_pitch+margin-1; + if (ol_pitch > st->max_pitch-margin) + ol_pitch=st->max_pitch-margin; + pit_min = ol_pitch-margin+1; + pit_max = ol_pitch+margin; + } else { + pit_min=pit_max=ol_pitch; + } + } else { + pit_min = st->min_pitch; + pit_max = st->max_pitch; + } + + /* Force pitch to use only the current frame if needed */ + if (st->bounded_pitch && pit_max>offset) + pit_max=offset; + + /* Perform pitch search */ + pitch = SUBMODE(ltp_quant)(target, sw, interp_qlpc, bw_lpc1, bw_lpc2, + exc32, SUBMODE(ltp_params), pit_min, pit_max, ol_pitch_coef, + st->lpcSize, st->subframeSize, bits, stack, + exc, syn_resp, st->complexity, 0, st->plc_tuning, &st->cumul_gain); + + st->pitch[sub]=pitch; + } + /* Quantization of innovation */ + SPEEX_MEMSET(innov, 0, st->subframeSize); + + /* FIXME: Make sure this is save from overflows (so far so good) */ + for (i=0;i<st->subframeSize;i++) + real_exc[i] = EXTRACT16(SUB32(EXTEND32(real_exc[i]), PSHR32(exc32[i],SIG_SHIFT-1))); + + ener = SHL32(EXTEND32(compute_rms16(real_exc, st->subframeSize)),SIG_SHIFT); + + /*FIXME: Should use DIV32_16 and make sure result fits in 16 bits */ +#ifdef FIXED_POINT + { + spx_word32_t f = PDIV32(ener,PSHR32(ol_gain,SIG_SHIFT)); + if (f<=32767) + fine_gain = f; + else + fine_gain = 32767; + } +#else + fine_gain = PDIV32_16(ener,PSHR32(ol_gain,SIG_SHIFT)); +#endif + /* Calculate gain correction for the sub-frame (if any) */ + if (SUBMODE(have_subframe_gain)) + { + int qe; + if (SUBMODE(have_subframe_gain)==3) + { + qe = scal_quant(fine_gain, exc_gain_quant_scal3_bound, 8); + speex_bits_pack(bits, qe, 3); + ener=MULT16_32_Q14(exc_gain_quant_scal3[qe],ol_gain); + } else { + qe = scal_quant(fine_gain, exc_gain_quant_scal1_bound, 2); + speex_bits_pack(bits, qe, 1); + ener=MULT16_32_Q14(exc_gain_quant_scal1[qe],ol_gain); + } + } else { + ener=ol_gain; + } + + /*printf ("%f %f\n", ener, ol_gain);*/ + + /* Normalize innovation */ + signal_div(target, target, ener, st->subframeSize); + + /* Quantize innovation */ + speex_assert (SUBMODE(innovation_quant)); + { + /* Codebook search */ + SUBMODE(innovation_quant)(target, interp_qlpc, bw_lpc1, bw_lpc2, + SUBMODE(innovation_params), st->lpcSize, st->subframeSize, + innov, syn_resp, bits, stack, st->complexity, SUBMODE(double_codebook)); + + /* De-normalize innovation and update excitation */ + signal_mul(innov, innov, ener, st->subframeSize); + + for (i=0;i<st->subframeSize;i++) + exc[i] = EXTRACT16(SATURATE32(PSHR32(ADD32(SHL32(exc32[i],1),innov[i]),SIG_SHIFT),32767)); + + /* In some (rare) modes, we do a second search (more bits) to reduce noise even more */ + if (SUBMODE(double_codebook)) { + char *tmp_stack=stack; + VARDECL(spx_sig_t *innov2); + ALLOC(innov2, st->subframeSize, spx_sig_t); + SPEEX_MEMSET(innov2, 0, st->subframeSize); + for (i=0;i<st->subframeSize;i++) + target[i]=MULT16_16_P13(QCONST16(2.2f,13), target[i]); + SUBMODE(innovation_quant)(target, interp_qlpc, bw_lpc1, bw_lpc2, + SUBMODE(innovation_params), st->lpcSize, st->subframeSize, + innov2, syn_resp, bits, stack, st->complexity, 0); + signal_mul(innov2, innov2, MULT16_32_Q15(QCONST16(0.454545f,15),ener), st->subframeSize); + for (i=0;i<st->subframeSize;i++) + innov[i] = ADD32(innov[i],innov2[i]); + stack = tmp_stack; + } + for (i=0;i<st->subframeSize;i++) + exc[i] = EXTRACT16(SATURATE32(PSHR32(ADD32(SHL32(exc32[i],1),innov[i]),SIG_SHIFT),32767)); + if (st->innov_rms_save) + { + st->innov_rms_save[sub] = compute_rms(innov, st->subframeSize); + } + } + + /* Final signal synthesis from excitation */ + iir_mem16(exc, interp_qlpc, sw, st->subframeSize, st->lpcSize, st->mem_sp, stack); + + /* Compute weighted signal again, from synthesized speech (not sure it's the right thing) */ + if (st->complexity!=0) + filter_mem16(sw, bw_lpc1, bw_lpc2, sw, st->subframeSize, st->lpcSize, st->mem_sw, stack); + + } + + /* Store the LSPs for interpolation in the next frame */ + if (st->submodeID>=1) + { + for (i=0;i<st->lpcSize;i++) + st->old_lsp[i] = lsp[i]; + for (i=0;i<st->lpcSize;i++) + st->old_qlsp[i] = qlsp[i]; + } + +#ifdef VORBIS_PSYCHO + if (st->submodeID>=1) + SPEEX_COPY(st->old_curve, st->curve, 128); +#endif + + if (st->submodeID==1) + { +#ifndef DISABLE_VBR + if (st->dtx_count) + speex_bits_pack(bits, 15, 4); + else +#endif + speex_bits_pack(bits, 0, 4); + } + + /* The next frame will not be the first (Duh!) */ + st->first = 0; + SPEEX_COPY(st->winBuf, in+2*st->frameSize-st->windowSize, st->windowSize-st->frameSize); + + if (SUBMODE(innovation_quant) == noise_codebook_quant || st->submodeID==0) + st->bounded_pitch = 1; + else + st->bounded_pitch = 0; + + return 1; +} + +void *nb_decoder_init(const SpeexMode *m) +{ + DecState *st; + const SpeexNBMode *mode; + int i; + + mode=(const SpeexNBMode*)m->mode; + st = (DecState *)speex_alloc(sizeof(DecState)); + if (!st) + return NULL; +#if defined(VAR_ARRAYS) || defined (USE_ALLOCA) + st->stack = NULL; +#else + st->stack = (char*)speex_alloc_scratch(NB_DEC_STACK); +#endif + + st->mode=m; + + + st->encode_submode = 1; + + st->first=1; + /* Codec parameters, should eventually have several "modes"*/ + st->frameSize = mode->frameSize; + st->nbSubframes=mode->frameSize/mode->subframeSize; + st->subframeSize=mode->subframeSize; + st->lpcSize = mode->lpcSize; + st->min_pitch=mode->pitchStart; + st->max_pitch=mode->pitchEnd; + + st->submodes=mode->submodes; + st->submodeID=mode->defaultSubmode; + + st->lpc_enh_enabled=1; + + st->excBuf = (spx_word16_t*)speex_alloc((st->frameSize + 2*st->max_pitch + st->subframeSize + 12)*sizeof(spx_word16_t)); + st->exc = st->excBuf + 2*st->max_pitch + st->subframeSize + 6; + SPEEX_MEMSET(st->excBuf, 0, st->frameSize + st->max_pitch); + + st->interp_qlpc = (spx_coef_t*)speex_alloc(st->lpcSize*sizeof(spx_coef_t)); + st->old_qlsp = (spx_lsp_t*)speex_alloc(st->lpcSize*sizeof(spx_lsp_t)); + st->mem_sp = (spx_mem_t*)speex_alloc(st->lpcSize*sizeof(spx_mem_t)); + st->pi_gain = (spx_word32_t*)speex_alloc((st->nbSubframes)*sizeof(spx_word32_t)); + st->last_pitch = 40; + st->count_lost=0; + st->pitch_gain_buf[0] = st->pitch_gain_buf[1] = st->pitch_gain_buf[2] = 0; + st->pitch_gain_buf_idx = 0; + st->seed = 1000; + + st->sampling_rate=8000; + st->last_ol_gain = 0; + + st->user_callback.func = &speex_default_user_handler; + st->user_callback.data = NULL; + for (i=0;i<16;i++) + st->speex_callbacks[i].func = NULL; + + st->voc_m1=st->voc_m2=st->voc_mean=0; + st->voc_offset=0; + st->dtx_enabled=0; + st->isWideband = 0; + st->highpass_enabled = 1; + +#ifdef ENABLE_VALGRIND + VALGRIND_MAKE_READABLE(st, NB_DEC_STACK); +#endif + return st; +} + +void nb_decoder_destroy(void *state) +{ + DecState *st; + st=(DecState*)state; + +#if !(defined(VAR_ARRAYS) || defined (USE_ALLOCA)) + speex_free_scratch(st->stack); +#endif + + speex_free (st->excBuf); + speex_free (st->interp_qlpc); + speex_free (st->old_qlsp); + speex_free (st->mem_sp); + speex_free (st->pi_gain); + + speex_free(state); +} + +#define median3(a, b, c) ((a) < (b) ? ((b) < (c) ? (b) : ((a) < (c) ? (c) : (a))) : ((c) < (b) ? (b) : ((c) < (a) ? (c) : (a)))) + +#ifdef FIXED_POINT +const spx_word16_t attenuation[10] = {32767, 31483, 27923, 22861, 17278, 12055, 7764, 4616, 2533, 1283}; +#else +const spx_word16_t attenuation[10] = {1., 0.961, 0.852, 0.698, 0.527, 0.368, 0.237, 0.141, 0.077, 0.039}; + +#endif + +static void nb_decode_lost(DecState *st, spx_word16_t *out, char *stack) +{ + int i; + int pitch_val; + spx_word16_t pitch_gain; + spx_word16_t fact; + spx_word16_t gain_med; + spx_word16_t innov_gain; + spx_word16_t noise_gain; + + if (st->count_lost<10) + fact = attenuation[st->count_lost]; + else + fact = 0; + + gain_med = median3(st->pitch_gain_buf[0], st->pitch_gain_buf[1], st->pitch_gain_buf[2]); + if (gain_med < st->last_pitch_gain) + st->last_pitch_gain = gain_med; + +#ifdef FIXED_POINT + pitch_gain = st->last_pitch_gain; + if (pitch_gain>54) + pitch_gain = 54; + pitch_gain = SHL16(pitch_gain, 9); +#else + pitch_gain = GAIN_SCALING_1*st->last_pitch_gain; + if (pitch_gain>.85) + pitch_gain=.85; +#endif + pitch_gain = MULT16_16_Q15(fact,pitch_gain) + VERY_SMALL; + /* FIXME: This was rms of innovation (not exc) */ + innov_gain = compute_rms16(st->exc, st->frameSize); + noise_gain = MULT16_16_Q15(innov_gain, MULT16_16_Q15(fact, SUB16(Q15ONE,MULT16_16_Q15(pitch_gain,pitch_gain)))); + /* Shift all buffers by one frame */ + SPEEX_MOVE(st->excBuf, st->excBuf+st->frameSize, 2*st->max_pitch + st->subframeSize + 12); + + + pitch_val = st->last_pitch + SHR32((spx_int32_t)speex_rand(1+st->count_lost, &st->seed),SIG_SHIFT); + if (pitch_val > st->max_pitch) + pitch_val = st->max_pitch; + if (pitch_val < st->min_pitch) + pitch_val = st->min_pitch; + for (i=0;i<st->frameSize;i++) + { + st->exc[i]= MULT16_16_Q15(pitch_gain, (st->exc[i-pitch_val]+VERY_SMALL)) + + speex_rand(noise_gain, &st->seed); + } + + bw_lpc(QCONST16(.98,15), st->interp_qlpc, st->interp_qlpc, st->lpcSize); + iir_mem16(&st->exc[-st->subframeSize], st->interp_qlpc, out, st->frameSize, + st->lpcSize, st->mem_sp, stack); + highpass(out, out, st->frameSize, HIGHPASS_NARROWBAND|HIGHPASS_OUTPUT, st->mem_hp); + + st->first = 0; + st->count_lost++; + st->pitch_gain_buf[st->pitch_gain_buf_idx++] = PSHR16(pitch_gain,9); + if (st->pitch_gain_buf_idx > 2) /* rollover */ + st->pitch_gain_buf_idx = 0; +} + +/* Just so we don't need to carry the complete wideband mode information */ +static const int wb_skip_table[8] = {0, 36, 112, 192, 352, 0, 0, 0}; + +int nb_decode(void *state, SpeexBits *bits, void *vout) +{ + DecState *st; + int i, sub; + int pitch; + spx_word16_t pitch_gain[3]; + spx_word32_t ol_gain=0; + int ol_pitch=0; + spx_word16_t ol_pitch_coef=0; + int best_pitch=40; + spx_word16_t best_pitch_gain=0; + int wideband; + int m; + char *stack; + VARDECL(spx_sig_t *innov); + VARDECL(spx_word32_t *exc32); + VARDECL(spx_coef_t *ak); + VARDECL(spx_lsp_t *qlsp); + spx_word16_t pitch_average=0; + + spx_word16_t *out = (spx_word16_t*)vout; + VARDECL(spx_lsp_t *interp_qlsp); + + st=(DecState*)state; + stack=st->stack; + + /* Check if we're in DTX mode*/ + if (!bits && st->dtx_enabled) + { + st->submodeID=0; + } else + { + /* If bits is NULL, consider the packet to be lost (what could we do anyway) */ + if (!bits) + { + nb_decode_lost(st, out, stack); + return 0; + } + + if (st->encode_submode) + { + + /* Search for next narrowband block (handle requests, skip wideband blocks) */ + do { + if (speex_bits_remaining(bits)<5) + return -1; + wideband = speex_bits_unpack_unsigned(bits, 1); + if (wideband) /* Skip wideband block (for compatibility) */ + { + int submode; + int advance; + advance = submode = speex_bits_unpack_unsigned(bits, SB_SUBMODE_BITS); + /*speex_mode_query(&speex_wb_mode, SPEEX_SUBMODE_BITS_PER_FRAME, &advance);*/ + advance = wb_skip_table[submode]; + if (advance < 0) + { + speex_notify("Invalid mode encountered. The stream is corrupted."); + return -2; + } + advance -= (SB_SUBMODE_BITS+1); + speex_bits_advance(bits, advance); + + if (speex_bits_remaining(bits)<5) + return -1; + wideband = speex_bits_unpack_unsigned(bits, 1); + if (wideband) + { + advance = submode = speex_bits_unpack_unsigned(bits, SB_SUBMODE_BITS); + /*speex_mode_query(&speex_wb_mode, SPEEX_SUBMODE_BITS_PER_FRAME, &advance);*/ + advance = wb_skip_table[submode]; + if (advance < 0) + { + speex_notify("Invalid mode encountered. The stream is corrupted."); + return -2; + } + advance -= (SB_SUBMODE_BITS+1); + speex_bits_advance(bits, advance); + wideband = speex_bits_unpack_unsigned(bits, 1); + if (wideband) + { + speex_notify("More than two wideband layers found. The stream is corrupted."); + return -2; + } + + } + } + if (speex_bits_remaining(bits)<4) + return -1; + /* FIXME: Check for overflow */ + m = speex_bits_unpack_unsigned(bits, 4); + if (m==15) /* We found a terminator */ + { + return -1; + } else if (m==14) /* Speex in-band request */ + { + int ret = speex_inband_handler(bits, st->speex_callbacks, state); + if (ret) + return ret; + } else if (m==13) /* User in-band request */ + { + int ret = st->user_callback.func(bits, state, st->user_callback.data); + if (ret) + return ret; + } else if (m>8) /* Invalid mode */ + { + speex_notify("Invalid mode encountered. The stream is corrupted."); + return -2; + } + + } while (m>8); + + /* Get the sub-mode that was used */ + st->submodeID = m; + } + + } + + /* Shift all buffers by one frame */ + SPEEX_MOVE(st->excBuf, st->excBuf+st->frameSize, 2*st->max_pitch + st->subframeSize + 12); + + /* If null mode (no transmission), just set a couple things to zero*/ + if (st->submodes[st->submodeID] == NULL) + { + VARDECL(spx_coef_t *lpc); + ALLOC(lpc, st->lpcSize, spx_coef_t); + bw_lpc(QCONST16(0.93f,15), st->interp_qlpc, lpc, st->lpcSize); + { + spx_word16_t innov_gain=0; + /* FIXME: This was innov, not exc */ + innov_gain = compute_rms16(st->exc, st->frameSize); + for (i=0;i<st->frameSize;i++) + st->exc[i]=speex_rand(innov_gain, &st->seed); + } + + + st->first=1; + + /* Final signal synthesis from excitation */ + iir_mem16(st->exc, lpc, out, st->frameSize, st->lpcSize, st->mem_sp, stack); + + st->count_lost=0; + return 0; + } + + ALLOC(qlsp, st->lpcSize, spx_lsp_t); + + /* Unquantize LSPs */ + SUBMODE(lsp_unquant)(qlsp, st->lpcSize, bits); + + /*Damp memory if a frame was lost and the LSP changed too much*/ + if (st->count_lost) + { + spx_word16_t fact; + spx_word32_t lsp_dist=0; + for (i=0;i<st->lpcSize;i++) + lsp_dist = ADD32(lsp_dist, EXTEND32(ABS(st->old_qlsp[i] - qlsp[i]))); +#ifdef FIXED_POINT + fact = SHR16(19661,SHR32(lsp_dist,LSP_SHIFT+2)); +#else + fact = .6*exp(-.2*lsp_dist); +#endif + for (i=0;i<st->lpcSize;i++) + st->mem_sp[i] = MULT16_32_Q15(fact,st->mem_sp[i]); + } + + + /* Handle first frame and lost-packet case */ + if (st->first || st->count_lost) + { + for (i=0;i<st->lpcSize;i++) + st->old_qlsp[i] = qlsp[i]; + } + + /* Get open-loop pitch estimation for low bit-rate pitch coding */ + if (SUBMODE(lbr_pitch)!=-1) + { + ol_pitch = st->min_pitch+speex_bits_unpack_unsigned(bits, 7); + } + + if (SUBMODE(forced_pitch_gain)) + { + int quant; + quant = speex_bits_unpack_unsigned(bits, 4); + ol_pitch_coef=MULT16_16_P15(QCONST16(0.066667,15),SHL16(quant,GAIN_SHIFT)); + } + + /* Get global excitation gain */ + { + int qe; + qe = speex_bits_unpack_unsigned(bits, 5); +#ifdef FIXED_POINT + /* FIXME: Perhaps we could slightly lower the gain here when the output is going to saturate? */ + ol_gain = MULT16_32_Q15(28406,ol_gain_table[qe]); +#else + ol_gain = SIG_SCALING*exp(qe/3.5); +#endif + } + + ALLOC(ak, st->lpcSize, spx_coef_t); + ALLOC(innov, st->subframeSize, spx_sig_t); + ALLOC(exc32, st->subframeSize, spx_word32_t); + + if (st->submodeID==1) + { + int extra; + extra = speex_bits_unpack_unsigned(bits, 4); + + if (extra==15) + st->dtx_enabled=1; + else + st->dtx_enabled=0; + } + if (st->submodeID>1) + st->dtx_enabled=0; + + /*Loop on subframes */ + for (sub=0;sub<st->nbSubframes;sub++) + { + int offset; + spx_word16_t *exc; + spx_word16_t *sp; + spx_word16_t *innov_save = NULL; + spx_word16_t tmp; + + /* Offset relative to start of frame */ + offset = st->subframeSize*sub; + /* Excitation */ + exc=st->exc+offset; + /* Original signal */ + sp=out+offset; + if (st->innov_save) + innov_save = st->innov_save+offset; + + + /* Reset excitation */ + SPEEX_MEMSET(exc, 0, st->subframeSize); + + /*Adaptive codebook contribution*/ + speex_assert (SUBMODE(ltp_unquant)); + { + int pit_min, pit_max; + /* Handle pitch constraints if any */ + if (SUBMODE(lbr_pitch) != -1) + { + int margin; + margin = SUBMODE(lbr_pitch); + if (margin) + { +/* GT - need optimization? + if (ol_pitch < st->min_pitch+margin-1) + ol_pitch=st->min_pitch+margin-1; + if (ol_pitch > st->max_pitch-margin) + ol_pitch=st->max_pitch-margin; + pit_min = ol_pitch-margin+1; + pit_max = ol_pitch+margin; +*/ + pit_min = ol_pitch-margin+1; + if (pit_min < st->min_pitch) + pit_min = st->min_pitch; + pit_max = ol_pitch+margin; + if (pit_max > st->max_pitch) + pit_max = st->max_pitch; + } else { + pit_min = pit_max = ol_pitch; + } + } else { + pit_min = st->min_pitch; + pit_max = st->max_pitch; + } + + + + SUBMODE(ltp_unquant)(exc, exc32, pit_min, pit_max, ol_pitch_coef, SUBMODE(ltp_params), + st->subframeSize, &pitch, &pitch_gain[0], bits, stack, + st->count_lost, offset, st->last_pitch_gain, 0); + + /* Ensuring that things aren't blowing up as would happen if e.g. an encoder is + crafting packets to make us produce NaNs and slow down the decoder (vague DoS threat). + We can probably be even more aggressive and limit to 15000 or so. */ + sanitize_values32(exc32, NEG32(QCONST32(32000,SIG_SHIFT-1)), QCONST32(32000,SIG_SHIFT-1), st->subframeSize); + + tmp = gain_3tap_to_1tap(pitch_gain); + + pitch_average += tmp; + if ((tmp>best_pitch_gain&&ABS(2*best_pitch-pitch)>=3&&ABS(3*best_pitch-pitch)>=4&&ABS(4*best_pitch-pitch)>=5) + || (tmp>MULT16_16_Q15(QCONST16(.6,15),best_pitch_gain)&&(ABS(best_pitch-2*pitch)<3||ABS(best_pitch-3*pitch)<4||ABS(best_pitch-4*pitch)<5)) + || (MULT16_16_Q15(QCONST16(.67,15),tmp)>best_pitch_gain&&(ABS(2*best_pitch-pitch)<3||ABS(3*best_pitch-pitch)<4||ABS(4*best_pitch-pitch)<5)) ) + { + best_pitch = pitch; + if (tmp > best_pitch_gain) + best_pitch_gain = tmp; + } + } + + /* Unquantize the innovation */ + { + int q_energy; + spx_word32_t ener; + + SPEEX_MEMSET(innov, 0, st->subframeSize); + + /* Decode sub-frame gain correction */ + if (SUBMODE(have_subframe_gain)==3) + { + q_energy = speex_bits_unpack_unsigned(bits, 3); + ener = MULT16_32_Q14(exc_gain_quant_scal3[q_energy],ol_gain); + } else if (SUBMODE(have_subframe_gain)==1) + { + q_energy = speex_bits_unpack_unsigned(bits, 1); + ener = MULT16_32_Q14(exc_gain_quant_scal1[q_energy],ol_gain); + } else { + ener = ol_gain; + } + + speex_assert (SUBMODE(innovation_unquant)); + { + /*Fixed codebook contribution*/ + SUBMODE(innovation_unquant)(innov, SUBMODE(innovation_params), st->subframeSize, bits, stack, &st->seed); + /* De-normalize innovation and update excitation */ + + signal_mul(innov, innov, ener, st->subframeSize); + + /* Decode second codebook (only for some modes) */ + if (SUBMODE(double_codebook)) + { + char *tmp_stack=stack; + VARDECL(spx_sig_t *innov2); + ALLOC(innov2, st->subframeSize, spx_sig_t); + SPEEX_MEMSET(innov2, 0, st->subframeSize); + SUBMODE(innovation_unquant)(innov2, SUBMODE(innovation_params), st->subframeSize, bits, stack, &st->seed); + signal_mul(innov2, innov2, MULT16_32_Q15(QCONST16(0.454545f,15),ener), st->subframeSize); + for (i=0;i<st->subframeSize;i++) + innov[i] = ADD32(innov[i], innov2[i]); + stack = tmp_stack; + } + for (i=0;i<st->subframeSize;i++) + exc[i]=EXTRACT16(SATURATE32(PSHR32(ADD32(SHL32(exc32[i],1),innov[i]),SIG_SHIFT),32767)); + /*print_vec(exc, 40, "innov");*/ + if (innov_save) + { + for (i=0;i<st->subframeSize;i++) + innov_save[i] = EXTRACT16(PSHR32(innov[i], SIG_SHIFT)); + } + } + + /*Vocoder mode*/ + if (st->submodeID==1) + { + spx_word16_t g=ol_pitch_coef; + g=MULT16_16_P14(QCONST16(1.5f,14),(g-QCONST16(.2f,6))); + if (g<0) + g=0; + if (g>GAIN_SCALING) + g=GAIN_SCALING; + + SPEEX_MEMSET(exc, 0, st->subframeSize); + while (st->voc_offset<st->subframeSize) + { + /* exc[st->voc_offset]= g*sqrt(2*ol_pitch)*ol_gain; + Not quite sure why we need the factor of two in the sqrt */ + if (st->voc_offset>=0) + exc[st->voc_offset]=MULT16_16(spx_sqrt(MULT16_16_16(2,ol_pitch)),EXTRACT16(PSHR32(MULT16_16(g,PSHR32(ol_gain,SIG_SHIFT)),6))); + st->voc_offset+=ol_pitch; + } + st->voc_offset -= st->subframeSize; + + for (i=0;i<st->subframeSize;i++) + { + spx_word16_t exci=exc[i]; + exc[i]= ADD16(ADD16(MULT16_16_Q15(QCONST16(.7f,15),exc[i]) , MULT16_16_Q15(QCONST16(.3f,15),st->voc_m1)), + SUB16(MULT16_16_Q15(Q15_ONE-MULT16_16_16(QCONST16(.85f,9),g),EXTRACT16(PSHR32(innov[i],SIG_SHIFT))), + MULT16_16_Q15(MULT16_16_16(QCONST16(.15f,9),g),EXTRACT16(PSHR32(st->voc_m2,SIG_SHIFT))) + )); + st->voc_m1 = exci; + st->voc_m2=innov[i]; + st->voc_mean = EXTRACT16(PSHR32(ADD32(MULT16_16(QCONST16(.8f,15),st->voc_mean), MULT16_16(QCONST16(.2f,15),exc[i])), 15)); + exc[i]-=st->voc_mean; + } + } + + } + } + + ALLOC(interp_qlsp, st->lpcSize, spx_lsp_t); + + if (st->lpc_enh_enabled && SUBMODE(comb_gain)>0 && !st->count_lost) + { + multicomb(st->exc-st->subframeSize, out, st->interp_qlpc, st->lpcSize, 2*st->subframeSize, best_pitch, 40, SUBMODE(comb_gain), stack); + multicomb(st->exc+st->subframeSize, out+2*st->subframeSize, st->interp_qlpc, st->lpcSize, 2*st->subframeSize, best_pitch, 40, SUBMODE(comb_gain), stack); + } else { + SPEEX_COPY(out, &st->exc[-st->subframeSize], st->frameSize); + } + + /* If the last packet was lost, re-scale the excitation to obtain the same energy as encoded in ol_gain */ + if (st->count_lost) + { + spx_word16_t exc_ener; + spx_word32_t gain32; + spx_word16_t gain; + exc_ener = compute_rms16 (st->exc, st->frameSize); + gain32 = PDIV32(ol_gain, ADD16(exc_ener,1)); +#ifdef FIXED_POINT + if (gain32 > 32767) + gain32 = 32767; + gain = EXTRACT16(gain32); +#else + if (gain32 > 2) + gain32=2; + gain = gain32; +#endif + for (i=0;i<st->frameSize;i++) + { + st->exc[i] = MULT16_16_Q14(gain, st->exc[i]); + out[i]=st->exc[i-st->subframeSize]; + } + } + + /*Loop on subframes */ + for (sub=0;sub<st->nbSubframes;sub++) + { + int offset; + spx_word16_t *sp; + spx_word16_t *exc; + /* Offset relative to start of frame */ + offset = st->subframeSize*sub; + /* Original signal */ + sp=out+offset; + /* Excitation */ + exc=st->exc+offset; + + /* LSP interpolation (quantized and unquantized) */ + lsp_interpolate(st->old_qlsp, qlsp, interp_qlsp, st->lpcSize, sub, st->nbSubframes); + + /* Make sure the LSP's are stable */ + lsp_enforce_margin(interp_qlsp, st->lpcSize, LSP_MARGIN); + + /* Compute interpolated LPCs (unquantized) */ + lsp_to_lpc(interp_qlsp, ak, st->lpcSize, stack); + + /* Compute analysis filter at w=pi */ + { + spx_word32_t pi_g=LPC_SCALING; + for (i=0;i<st->lpcSize;i+=2) + { + /*pi_g += -st->interp_qlpc[i] + st->interp_qlpc[i+1];*/ + pi_g = ADD32(pi_g, SUB32(EXTEND32(ak[i+1]),EXTEND32(ak[i]))); + } + st->pi_gain[sub] = pi_g; + } + + iir_mem16(sp, st->interp_qlpc, sp, st->subframeSize, st->lpcSize, + st->mem_sp, stack); + + for (i=0;i<st->lpcSize;i++) + st->interp_qlpc[i] = ak[i]; + + } + + if (st->highpass_enabled) + highpass(out, out, st->frameSize, (st->isWideband?HIGHPASS_WIDEBAND:HIGHPASS_NARROWBAND)|HIGHPASS_OUTPUT, st->mem_hp); + /*for (i=0;i<st->frameSize;i++) + printf ("%d\n", (int)st->frame[i]);*/ + + /* Tracking output level */ + st->level = 1+PSHR32(ol_gain,SIG_SHIFT); + st->max_level = MAX16(MULT16_16_Q15(QCONST16(.99f,15), st->max_level), st->level); + st->min_level = MIN16(ADD16(1,MULT16_16_Q14(QCONST16(1.01f,14), st->min_level)), st->level); + if (st->max_level < st->min_level+1) + st->max_level = st->min_level+1; + /*printf ("%f %f %f %d\n", og, st->min_level, st->max_level, update);*/ + + /* Store the LSPs for interpolation in the next frame */ + for (i=0;i<st->lpcSize;i++) + st->old_qlsp[i] = qlsp[i]; + + /* The next frame will not be the first (Duh!) */ + st->first = 0; + st->count_lost=0; + st->last_pitch = best_pitch; +#ifdef FIXED_POINT + st->last_pitch_gain = PSHR16(pitch_average,2); +#else + st->last_pitch_gain = .25*pitch_average; +#endif + st->pitch_gain_buf[st->pitch_gain_buf_idx++] = st->last_pitch_gain; + if (st->pitch_gain_buf_idx > 2) /* rollover */ + st->pitch_gain_buf_idx = 0; + + st->last_ol_gain = ol_gain; + + return 0; +} + +int nb_encoder_ctl(void *state, int request, void *ptr) +{ + EncState *st; + st=(EncState*)state; + switch(request) + { + case SPEEX_GET_FRAME_SIZE: + (*(spx_int32_t*)ptr) = st->frameSize; + break; + case SPEEX_SET_LOW_MODE: + case SPEEX_SET_MODE: + st->submodeSelect = st->submodeID = (*(spx_int32_t*)ptr); + break; + case SPEEX_GET_LOW_MODE: + case SPEEX_GET_MODE: + (*(spx_int32_t*)ptr) = st->submodeID; + break; +#ifndef DISABLE_VBR + case SPEEX_SET_VBR: + st->vbr_enabled = (*(spx_int32_t*)ptr); + break; + case SPEEX_GET_VBR: + (*(spx_int32_t*)ptr) = st->vbr_enabled; + break; + case SPEEX_SET_VAD: + st->vad_enabled = (*(spx_int32_t*)ptr); + break; + case SPEEX_GET_VAD: + (*(spx_int32_t*)ptr) = st->vad_enabled; + break; + case SPEEX_SET_DTX: + st->dtx_enabled = (*(spx_int32_t*)ptr); + break; + case SPEEX_GET_DTX: + (*(spx_int32_t*)ptr) = st->dtx_enabled; + break; + case SPEEX_SET_ABR: + st->abr_enabled = (*(spx_int32_t*)ptr); + st->vbr_enabled = st->abr_enabled!=0; + if (st->vbr_enabled) + { + spx_int32_t i=10; + spx_int32_t rate, target; + float vbr_qual; + target = (*(spx_int32_t*)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: + (*(spx_int32_t*)ptr) = st->abr_enabled; + break; +#endif /* #ifndef DISABLE_VBR */ +#if !defined(DISABLE_VBR) && !defined(DISABLE_FLOAT_API) + case SPEEX_SET_VBR_QUALITY: + st->vbr_quality = (*(float*)ptr); + break; + case SPEEX_GET_VBR_QUALITY: + (*(float*)ptr) = st->vbr_quality; + break; +#endif /* !defined(DISABLE_VBR) && !defined(DISABLE_FLOAT_API) */ + case SPEEX_SET_QUALITY: + { + int quality = (*(spx_int32_t*)ptr); + if (quality < 0) + quality = 0; + if (quality > 10) + quality = 10; + st->submodeSelect = st->submodeID = ((const SpeexNBMode*)(st->mode->mode))->quality_map[quality]; + } + break; + case SPEEX_SET_COMPLEXITY: + st->complexity = (*(spx_int32_t*)ptr); + if (st->complexity<0) + st->complexity=0; + break; + case SPEEX_GET_COMPLEXITY: + (*(spx_int32_t*)ptr) = st->complexity; + break; + case SPEEX_SET_BITRATE: + { + spx_int32_t i=10; + spx_int32_t rate, target; + target = (*(spx_int32_t*)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: + if (st->submodes[st->submodeID]) + (*(spx_int32_t*)ptr) = st->sampling_rate*SUBMODE(bits_per_frame)/st->frameSize; + else + (*(spx_int32_t*)ptr) = st->sampling_rate*(NB_SUBMODE_BITS+1)/st->frameSize; + break; + case SPEEX_SET_SAMPLING_RATE: + st->sampling_rate = (*(spx_int32_t*)ptr); + break; + case SPEEX_GET_SAMPLING_RATE: + (*(spx_int32_t*)ptr)=st->sampling_rate; + break; + case SPEEX_RESET_STATE: + { + int i; + st->bounded_pitch = 1; + st->first = 1; + for (i=0;i<st->lpcSize;i++) + st->old_lsp[i]= DIV32(MULT16_16(QCONST16(3.1415927f, LSP_SHIFT), i+1), st->lpcSize+1); + for (i=0;i<st->lpcSize;i++) + st->mem_sw[i]=st->mem_sw_whole[i]=st->mem_sp[i]=st->mem_exc[i]=0; + for (i=0;i<st->frameSize+st->max_pitch+1;i++) + st->excBuf[i]=st->swBuf[i]=0; + for (i=0;i<st->windowSize-st->frameSize;i++) + st->winBuf[i]=0; + } + break; + case SPEEX_SET_SUBMODE_ENCODING: + st->encode_submode = (*(spx_int32_t*)ptr); + break; + case SPEEX_GET_SUBMODE_ENCODING: + (*(spx_int32_t*)ptr) = st->encode_submode; + break; + case SPEEX_GET_LOOKAHEAD: + (*(spx_int32_t*)ptr)=(st->windowSize-st->frameSize); + break; + case SPEEX_SET_PLC_TUNING: + st->plc_tuning = (*(spx_int32_t*)ptr); + if (st->plc_tuning>100) + st->plc_tuning=100; + break; + case SPEEX_GET_PLC_TUNING: + (*(spx_int32_t*)ptr)=(st->plc_tuning); + break; +#ifndef DISABLE_VBR + case SPEEX_SET_VBR_MAX_BITRATE: + st->vbr_max = (*(spx_int32_t*)ptr); + break; + case SPEEX_GET_VBR_MAX_BITRATE: + (*(spx_int32_t*)ptr) = st->vbr_max; + break; +#endif /* #ifndef DISABLE_VBR */ + case SPEEX_SET_HIGHPASS: + st->highpass_enabled = (*(spx_int32_t*)ptr); + break; + case SPEEX_GET_HIGHPASS: + (*(spx_int32_t*)ptr) = st->highpass_enabled; + break; + + /* This is all internal stuff past this point */ + 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; + for (i=0;i<st->nbSubframes;i++) + ((spx_word16_t*)ptr)[i] = compute_rms16(st->exc+i*st->subframeSize, st->subframeSize); + } + break; +#ifndef DISABLE_VBR + case SPEEX_GET_RELATIVE_QUALITY: + (*(float*)ptr)=st->relative_quality; + break; +#endif /* #ifndef DISABLE_VBR */ + case SPEEX_SET_INNOVATION_SAVE: + st->innov_rms_save = (spx_word16_t*)ptr; + break; + case SPEEX_SET_WIDEBAND: + st->isWideband = *((spx_int32_t*)ptr); + break; + case SPEEX_GET_STACK: + *((char**)ptr) = st->stack; + break; + default: + speex_warning_int("Unknown nb_ctl request: ", request); + return -1; + } + return 0; +} + +int nb_decoder_ctl(void *state, int request, void *ptr) +{ + DecState *st; + st=(DecState*)state; + switch(request) + { + case SPEEX_SET_LOW_MODE: + case SPEEX_SET_MODE: + st->submodeID = (*(spx_int32_t*)ptr); + break; + case SPEEX_GET_LOW_MODE: + case SPEEX_GET_MODE: + (*(spx_int32_t*)ptr) = st->submodeID; + break; + case SPEEX_SET_ENH: + st->lpc_enh_enabled = *((spx_int32_t*)ptr); + break; + case SPEEX_GET_ENH: + *((spx_int32_t*)ptr) = st->lpc_enh_enabled; + break; + case SPEEX_GET_FRAME_SIZE: + (*(spx_int32_t*)ptr) = st->frameSize; + break; + case SPEEX_GET_BITRATE: + if (st->submodes[st->submodeID]) + (*(spx_int32_t*)ptr) = st->sampling_rate*SUBMODE(bits_per_frame)/st->frameSize; + else + (*(spx_int32_t*)ptr) = st->sampling_rate*(NB_SUBMODE_BITS+1)/st->frameSize; + break; + case SPEEX_SET_SAMPLING_RATE: + st->sampling_rate = (*(spx_int32_t*)ptr); + break; + case SPEEX_GET_SAMPLING_RATE: + (*(spx_int32_t*)ptr)=st->sampling_rate; + break; + case SPEEX_SET_HANDLER: + { + SpeexCallback *c = (SpeexCallback*)ptr; + st->speex_callbacks[c->callback_id].func=c->func; + st->speex_callbacks[c->callback_id].data=c->data; + st->speex_callbacks[c->callback_id].callback_id=c->callback_id; + } + break; + case SPEEX_SET_USER_HANDLER: + { + SpeexCallback *c = (SpeexCallback*)ptr; + st->user_callback.func=c->func; + st->user_callback.data=c->data; + st->user_callback.callback_id=c->callback_id; + } + break; + case SPEEX_RESET_STATE: + { + int i; + for (i=0;i<st->lpcSize;i++) + st->mem_sp[i]=0; + for (i=0;i<st->frameSize + st->max_pitch + 1;i++) + st->excBuf[i]=0; + } + break; + case SPEEX_SET_SUBMODE_ENCODING: + st->encode_submode = (*(spx_int32_t*)ptr); + break; + case SPEEX_GET_SUBMODE_ENCODING: + (*(spx_int32_t*)ptr) = st->encode_submode; + break; + case SPEEX_GET_LOOKAHEAD: + (*(spx_int32_t*)ptr)=st->subframeSize; + break; + case SPEEX_SET_HIGHPASS: + st->highpass_enabled = (*(spx_int32_t*)ptr); + break; + case SPEEX_GET_HIGHPASS: + (*(spx_int32_t*)ptr) = st->highpass_enabled; + break; + /* FIXME: Convert to fixed-point and re-enable even when float API is disabled */ +#ifndef DISABLE_FLOAT_API + case SPEEX_GET_ACTIVITY: + { + float ret; + ret = log(st->level/st->min_level)/log(st->max_level/st->min_level); + if (ret>1) + ret = 1; + /* Done in a strange way to catch NaNs as well */ + if (!(ret > 0)) + ret = 0; + /*printf ("%f %f %f %f\n", st->level, st->min_level, st->max_level, ret);*/ + (*(spx_int32_t*)ptr) = (int)(100*ret); + } + break; +#endif + 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; + for (i=0;i<st->nbSubframes;i++) + ((spx_word16_t*)ptr)[i] = compute_rms16(st->exc+i*st->subframeSize, st->subframeSize); + } + break; + case SPEEX_GET_DTX_STATUS: + *((spx_int32_t*)ptr) = st->dtx_enabled; + break; + case SPEEX_SET_INNOVATION_SAVE: + st->innov_save = (spx_word16_t*)ptr; + break; + case SPEEX_SET_WIDEBAND: + st->isWideband = *((spx_int32_t*)ptr); + break; + case SPEEX_GET_STACK: + *((char**)ptr) = st->stack; + break; + default: + speex_warning_int("Unknown nb_ctl request: ", request); + return -1; + } + return 0; +} |