| /* 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; |
| } |