mirror of
https://github.com/mollyim/webrtc.git
synced 2025-05-14 06:10:40 +01:00
06c2aa9f7b
WebRTC internal code should always use include paths that start from the root of the project and that clearly identify the header file. This allows 'gn check' to actually keep dependencies under control because 'gn check' cannot enforce anything if the include path is not fully qualified (starting from the root of the project). Bug: webrtc:8815 Change-Id: I36f01784fa5f5b77eefc02db479b1f7f6ee1a8c3 Reviewed-on: https://webrtc-review.googlesource.com/46263 Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Cr-Commit-Position: refs/heads/master@{#21871}
131 lines
5.1 KiB
C
131 lines
5.1 KiB
C
/*
|
|
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license
|
|
* that can be found in the LICENSE file in the root of the source
|
|
* tree. An additional intellectual property rights grant can be found
|
|
* in the file PATENTS. All contributing project authors may
|
|
* be found in the AUTHORS file in the root of the source tree.
|
|
*/
|
|
|
|
/******************************************************************
|
|
|
|
iLBC Speech Coder ANSI-C Source Code
|
|
|
|
WebRtcIlbcfix_SimpleInterpolateLsf.c
|
|
|
|
******************************************************************/
|
|
|
|
#include "modules/audio_coding/codecs/ilbc/defines.h"
|
|
#include "modules/audio_coding/codecs/ilbc/lsf_interpolate_to_poly_enc.h"
|
|
#include "modules/audio_coding/codecs/ilbc/bw_expand.h"
|
|
#include "modules/audio_coding/codecs/ilbc/constants.h"
|
|
|
|
/*----------------------------------------------------------------*
|
|
* lsf interpolator (subrutine to LPCencode)
|
|
*---------------------------------------------------------------*/
|
|
|
|
void WebRtcIlbcfix_SimpleInterpolateLsf(
|
|
int16_t *syntdenum, /* (o) the synthesis filter denominator
|
|
resulting from the quantized
|
|
interpolated lsf Q12 */
|
|
int16_t *weightdenum, /* (o) the weighting filter denominator
|
|
resulting from the unquantized
|
|
interpolated lsf Q12 */
|
|
int16_t *lsf, /* (i) the unquantized lsf coefficients Q13 */
|
|
int16_t *lsfdeq, /* (i) the dequantized lsf coefficients Q13 */
|
|
int16_t *lsfold, /* (i) the unquantized lsf coefficients of
|
|
the previous signal frame Q13 */
|
|
int16_t *lsfdeqold, /* (i) the dequantized lsf coefficients of the
|
|
previous signal frame Q13 */
|
|
int16_t length, /* (i) should equate FILTERORDER */
|
|
IlbcEncoder *iLBCenc_inst
|
|
/* (i/o) the encoder state structure */
|
|
) {
|
|
size_t i;
|
|
int pos, lp_length;
|
|
|
|
int16_t *lsf2, *lsfdeq2;
|
|
/* Stack based */
|
|
int16_t lp[LPC_FILTERORDER + 1];
|
|
|
|
lsf2 = lsf + length;
|
|
lsfdeq2 = lsfdeq + length;
|
|
lp_length = length + 1;
|
|
|
|
if (iLBCenc_inst->mode==30) {
|
|
/* subframe 1: Interpolation between old and first set of
|
|
lsf coefficients */
|
|
|
|
/* Calculate Analysis/Syntehsis filter from quantized LSF */
|
|
WebRtcIlbcfix_LsfInterpolate2PloyEnc(lp, lsfdeqold, lsfdeq,
|
|
WebRtcIlbcfix_kLsfWeight30ms[0],
|
|
length);
|
|
WEBRTC_SPL_MEMCPY_W16(syntdenum, lp, lp_length);
|
|
|
|
/* Calculate Weighting filter from quantized LSF */
|
|
WebRtcIlbcfix_LsfInterpolate2PloyEnc(lp, lsfold, lsf,
|
|
WebRtcIlbcfix_kLsfWeight30ms[0],
|
|
length);
|
|
WebRtcIlbcfix_BwExpand(weightdenum, lp,
|
|
(int16_t*)WebRtcIlbcfix_kLpcChirpWeightDenum,
|
|
(int16_t)lp_length);
|
|
|
|
/* subframe 2 to 6: Interpolation between first and second
|
|
set of lsf coefficients */
|
|
|
|
pos = lp_length;
|
|
for (i = 1; i < iLBCenc_inst->nsub; i++) {
|
|
|
|
/* Calculate Analysis/Syntehsis filter from quantized LSF */
|
|
WebRtcIlbcfix_LsfInterpolate2PloyEnc(lp, lsfdeq, lsfdeq2,
|
|
WebRtcIlbcfix_kLsfWeight30ms[i],
|
|
length);
|
|
WEBRTC_SPL_MEMCPY_W16(syntdenum + pos, lp, lp_length);
|
|
|
|
/* Calculate Weighting filter from quantized LSF */
|
|
WebRtcIlbcfix_LsfInterpolate2PloyEnc(lp, lsf, lsf2,
|
|
WebRtcIlbcfix_kLsfWeight30ms[i],
|
|
length);
|
|
WebRtcIlbcfix_BwExpand(weightdenum + pos, lp,
|
|
(int16_t*)WebRtcIlbcfix_kLpcChirpWeightDenum,
|
|
(int16_t)lp_length);
|
|
|
|
pos += lp_length;
|
|
}
|
|
|
|
/* update memory */
|
|
|
|
WEBRTC_SPL_MEMCPY_W16(lsfold, lsf2, length);
|
|
WEBRTC_SPL_MEMCPY_W16(lsfdeqold, lsfdeq2, length);
|
|
|
|
} else { /* iLBCenc_inst->mode==20 */
|
|
pos = 0;
|
|
for (i = 0; i < iLBCenc_inst->nsub; i++) {
|
|
|
|
/* Calculate Analysis/Syntehsis filter from quantized LSF */
|
|
WebRtcIlbcfix_LsfInterpolate2PloyEnc(lp, lsfdeqold, lsfdeq,
|
|
WebRtcIlbcfix_kLsfWeight20ms[i],
|
|
length);
|
|
WEBRTC_SPL_MEMCPY_W16(syntdenum + pos, lp, lp_length);
|
|
|
|
/* Calculate Weighting filter from quantized LSF */
|
|
WebRtcIlbcfix_LsfInterpolate2PloyEnc(lp, lsfold, lsf,
|
|
WebRtcIlbcfix_kLsfWeight20ms[i],
|
|
length);
|
|
WebRtcIlbcfix_BwExpand(weightdenum+pos, lp,
|
|
(int16_t*)WebRtcIlbcfix_kLpcChirpWeightDenum,
|
|
(int16_t)lp_length);
|
|
|
|
pos += lp_length;
|
|
}
|
|
|
|
/* update memory */
|
|
|
|
WEBRTC_SPL_MEMCPY_W16(lsfold, lsf, length);
|
|
WEBRTC_SPL_MEMCPY_W16(lsfdeqold, lsfdeq, length);
|
|
|
|
}
|
|
|
|
return;
|
|
}
|