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In order to eliminate the WebRTC Subtree mirror in Chromium, WebRTC is moving the content of the src/webrtc directory up to the src/ directory. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true TBR=tommi@webrtc.org Bug: chromium:611808 Change-Id: Iac59c5b51b950f174119565bac87955a7994bc38 Reviewed-on: https://webrtc-review.googlesource.com/1560 Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Henrik Kjellander <kjellander@webrtc.org> Cr-Commit-Position: refs/heads/master@{#19845}
131 lines
4.9 KiB
C
131 lines
4.9 KiB
C
/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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/******************************************************************
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iLBC Speech Coder ANSI-C Source Code
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WebRtcIlbcfix_SimpleInterpolateLsf.c
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******************************************************************/
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#include "defines.h"
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#include "lsf_interpolate_to_poly_enc.h"
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#include "bw_expand.h"
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#include "constants.h"
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/*----------------------------------------------------------------*
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* lsf interpolator (subrutine to LPCencode)
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*---------------------------------------------------------------*/
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void WebRtcIlbcfix_SimpleInterpolateLsf(
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int16_t *syntdenum, /* (o) the synthesis filter denominator
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resulting from the quantized
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interpolated lsf Q12 */
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int16_t *weightdenum, /* (o) the weighting filter denominator
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resulting from the unquantized
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interpolated lsf Q12 */
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int16_t *lsf, /* (i) the unquantized lsf coefficients Q13 */
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int16_t *lsfdeq, /* (i) the dequantized lsf coefficients Q13 */
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int16_t *lsfold, /* (i) the unquantized lsf coefficients of
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the previous signal frame Q13 */
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int16_t *lsfdeqold, /* (i) the dequantized lsf coefficients of the
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previous signal frame Q13 */
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int16_t length, /* (i) should equate FILTERORDER */
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IlbcEncoder *iLBCenc_inst
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/* (i/o) the encoder state structure */
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) {
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size_t i;
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int pos, lp_length;
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int16_t *lsf2, *lsfdeq2;
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/* Stack based */
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int16_t lp[LPC_FILTERORDER + 1];
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lsf2 = lsf + length;
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lsfdeq2 = lsfdeq + length;
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lp_length = length + 1;
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if (iLBCenc_inst->mode==30) {
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/* subframe 1: Interpolation between old and first set of
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lsf coefficients */
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/* Calculate Analysis/Syntehsis filter from quantized LSF */
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WebRtcIlbcfix_LsfInterpolate2PloyEnc(lp, lsfdeqold, lsfdeq,
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WebRtcIlbcfix_kLsfWeight30ms[0],
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length);
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WEBRTC_SPL_MEMCPY_W16(syntdenum, lp, lp_length);
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/* Calculate Weighting filter from quantized LSF */
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WebRtcIlbcfix_LsfInterpolate2PloyEnc(lp, lsfold, lsf,
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WebRtcIlbcfix_kLsfWeight30ms[0],
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length);
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WebRtcIlbcfix_BwExpand(weightdenum, lp,
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(int16_t*)WebRtcIlbcfix_kLpcChirpWeightDenum,
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(int16_t)lp_length);
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/* subframe 2 to 6: Interpolation between first and second
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set of lsf coefficients */
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pos = lp_length;
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for (i = 1; i < iLBCenc_inst->nsub; i++) {
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/* Calculate Analysis/Syntehsis filter from quantized LSF */
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WebRtcIlbcfix_LsfInterpolate2PloyEnc(lp, lsfdeq, lsfdeq2,
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WebRtcIlbcfix_kLsfWeight30ms[i],
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length);
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WEBRTC_SPL_MEMCPY_W16(syntdenum + pos, lp, lp_length);
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/* Calculate Weighting filter from quantized LSF */
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WebRtcIlbcfix_LsfInterpolate2PloyEnc(lp, lsf, lsf2,
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WebRtcIlbcfix_kLsfWeight30ms[i],
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length);
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WebRtcIlbcfix_BwExpand(weightdenum + pos, lp,
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(int16_t*)WebRtcIlbcfix_kLpcChirpWeightDenum,
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(int16_t)lp_length);
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pos += lp_length;
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}
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/* update memory */
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WEBRTC_SPL_MEMCPY_W16(lsfold, lsf2, length);
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WEBRTC_SPL_MEMCPY_W16(lsfdeqold, lsfdeq2, length);
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} else { /* iLBCenc_inst->mode==20 */
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pos = 0;
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for (i = 0; i < iLBCenc_inst->nsub; i++) {
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/* Calculate Analysis/Syntehsis filter from quantized LSF */
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WebRtcIlbcfix_LsfInterpolate2PloyEnc(lp, lsfdeqold, lsfdeq,
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WebRtcIlbcfix_kLsfWeight20ms[i],
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length);
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WEBRTC_SPL_MEMCPY_W16(syntdenum + pos, lp, lp_length);
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/* Calculate Weighting filter from quantized LSF */
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WebRtcIlbcfix_LsfInterpolate2PloyEnc(lp, lsfold, lsf,
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WebRtcIlbcfix_kLsfWeight20ms[i],
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length);
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WebRtcIlbcfix_BwExpand(weightdenum+pos, lp,
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(int16_t*)WebRtcIlbcfix_kLpcChirpWeightDenum,
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(int16_t)lp_length);
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pos += lp_length;
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}
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/* update memory */
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WEBRTC_SPL_MEMCPY_W16(lsfold, lsf, length);
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WEBRTC_SPL_MEMCPY_W16(lsfdeqold, lsfdeq, length);
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}
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return;
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}
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