| /frameworks/av/media/libstagefright/codecs/amrnb/enc/src/ |
| lpc.cpp | 34 Pathname: ./audio/gsm-amr/c/src/lpc.c
58 #include "lpc.h"
117 This function initializes the state data for the LPC module.
127 lpc.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001
240 This function resets the state data for the LPC module.
250 lpc.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001
324 This function frees the state data for the LPC module.
334 lpc.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001
391 FUNCTION NAME: lpc
417 This function executes the LPC functionality for GSM AMR
487 void lpc( function
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| /external/chromium_org/third_party/opus/src/celt/ |
| celt_lpc.c | 38 opus_val16 *_lpc, /* out: [0...p-1] LPC coefficients */
47 opus_val32 lpc[LPC_ORDER]; local
49 float *lpc = _lpc; local
53 lpc[i] = 0;
60 rr += MULT32_32_Q31(lpc[j],ac[i - j]);
63 /* Update LPC coefficients and total error */
64 lpc[i] = SHR32(r,3);
68 tmp1 = lpc[j];
69 tmp2 = lpc[i-1-j];
70 lpc[j] = tmp1 + MULT32_32_Q31(r,tmp2)
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| pitch.c | 153 opus_val16 lpc[4], mem[5]={0,0,0,0,0}; local
202 _celt_lpc(lpc, ac, 4);
206 lpc[i] = MULT16_16_Q15(lpc[i], tmp);
209 lpc2[0] = lpc[0] + QCONST16(.8f,SIG_SHIFT);
210 lpc2[1] = lpc[1] + MULT16_16_Q15(c1,lpc[0]);
211 lpc2[2] = lpc[2] + MULT16_16_Q15(c1,lpc[1]);
212 lpc2[3] = lpc[3] + MULT16_16_Q15(c1,lpc[2])
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| celt_decoder.c | 92 /* opus_val16 lpc[], Size = channels*LPC_ORDER */
340 opus_val16 *lpc; local
362 lpc = (opus_val16*)(st->_decode_mem+(DECODE_BUFFER_SIZE+overlap)*C);
363 oldBandE = lpc+C*LPC_ORDER;
482 /* Compute LPC coefficients for the last MAX_PERIOD samples before
501 _celt_lpc(lpc+c*LPC_ORDER, ac, LPC_ORDER);
506 /* Initialize the LPC history with the samples just before the start
516 celt_fir(exc+MAX_PERIOD-exc_length, lpc+c*LPC_ORDER,
582 celt_iir(buf+DECODE_BUFFER_SIZE-N, lpc+c*LPC_ORDER,
671 opus_val16 *lpc; local
1142 opus_val16 *lpc, *oldBandE, *oldLogE, *oldLogE2; local
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| /external/libvorbis/lib/ |
| lpc.c | 13 function: LPC low level routines
14 last mod: $Id: lpc.c 16227 2009-07-08 06:58:46Z xiphmont $
18 /* Some of these routines (autocorrelator, LPC coefficient estimator)
51 #include "lpc.h"
55 /* Autocorrelation LPC coeff generation algorithm invented by
59 Output: m lpc coefficients, excitation energy */
63 double *lpc=alloca(sizeof(*lpc)*(m)); local
76 /* Generate lpc coefficients from autocorr values */
86 memset(lpc+i,0,(m-i)*sizeof(*lpc))
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| block.c | 30 #include "lpc.h"
418 float *lpc=alloca(order*sizeof(*lpc)); local
430 vorbis_lpc_from_data(work,lpc,v->pcm_current-v->centerW,order);
444 vorbis_lpc_predict(lpc,work+v->pcm_current-v->centerW-order,
466 float *lpc=alloca(order*sizeof(*lpc)); local
484 /* extrapolate with LPC to fill in */
490 vorbis_lpc_from_data(v->pcm[i]+v->eofflag-n,lpc,n,order);
493 vorbis_lpc_predict(lpc,v->pcm[i]+v->eofflag-order,order
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| /external/flac/libFLAC/ |
| lpc.c | 40 #include "private/lpc.h"
115 FLAC__double r, err, ref[FLAC__MAX_LPC_ORDER], lpc[FLAC__MAX_LPC_ORDER]; local
128 r -= lpc[j] * autoc[i-j];
131 /* Update LPC coefficients and total error. */
132 lpc[i]=r;
134 FLAC__double tmp = lpc[j];
135 lpc[j] += r * lpc[i-1-j];
136 lpc[i-1-j] += r * tmp;
139 lpc[j] += lpc[j] * r
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| /external/speex/libspeex/ |
| nb_celp.c | 38 #include "lpc.h"
266 VARDECL(spx_coef_t *lpc);
284 ALLOC(lpc, st->lpcSize, spx_coef_t);
320 _spx_lpc(lpc, autocorr, st->lpcSize);
321 /* LPC to LSPs (x-domain) transform */
322 roots=lpc_to_lsp (lpc, st->lpcSize, lsp, 10, LSP_DELTA1, stack);
1208 bw_lpc(QCONST16(0.93f,15), st->interp_qlpc, lpc, st->lpcSize); local
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| /external/flac/include/FLAC/ |
| format.h | 129 /** The maximum LPC order permitted by the format. */
132 /** The maximum LPC order permitted by the FLAC subset for sample rates
312 /** LPC subframe. (c.f. <A HREF="../format.html#subframe_lpc">format specification</A>)
348 FLAC__Subframe_LPC lpc; member in union:__anon18284::__anon18285
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