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3111783aa1
Prior to this commit, most .c files in modules/audio_coding/codecs/ilbc don't include their corresponding headers, nor do they order #includes as per the Google Style Guide [1]. The former is especially harmful, since in C it can silently allow the function signature to diverge from its prototype, thus causing disaster at runtime. This CL fixes both issues. In effect, this allows the common_audio and modules/audio_coding:ilbc targets to be compiled with Clang's -Wmissing-prototypes, though this CL does not add that change. [1]: https://google.github.io/styleguide/cppguide.html#Names_and_Order_of_Includes Bug: webrtc:12314 Change-Id: I8299968ed3cc86ff35d9de045072b846298043af Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/198362 Reviewed-by: Henrik Lundin <henrik.lundin@webrtc.org> Commit-Queue: Timothy Gu <timothygu@chromium.org> Cr-Commit-Position: refs/heads/master@{#32896}
85 lines
3.4 KiB
C
85 lines
3.4 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_DecoderInterpolateLsp.c
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******************************************************************/
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#include "modules/audio_coding/codecs/ilbc/decoder_interpolate_lsf.h"
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#include "modules/audio_coding/codecs/ilbc/bw_expand.h"
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#include "modules/audio_coding/codecs/ilbc/constants.h"
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#include "modules/audio_coding/codecs/ilbc/defines.h"
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#include "modules/audio_coding/codecs/ilbc/lsf_interpolate_to_poly_dec.h"
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/*----------------------------------------------------------------*
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* obtain synthesis and weighting filters form lsf coefficients
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*---------------------------------------------------------------*/
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void WebRtcIlbcfix_DecoderInterpolateLsp(
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int16_t *syntdenum, /* (o) synthesis filter coefficients */
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int16_t *weightdenum, /* (o) weighting denumerator
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coefficients */
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int16_t *lsfdeq, /* (i) dequantized lsf coefficients */
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int16_t length, /* (i) length of lsf coefficient vector */
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IlbcDecoder *iLBCdec_inst
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/* (i) the decoder 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 lp[LPC_FILTERORDER + 1], *lsfdeq2;
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lsfdeq2 = lsfdeq + length;
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lp_length = length + 1;
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if (iLBCdec_inst->mode==30) {
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/* subframe 1: Interpolation between old and first LSF */
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WebRtcIlbcfix_LspInterpolate2PolyDec(lp, (*iLBCdec_inst).lsfdeqold, lsfdeq,
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WebRtcIlbcfix_kLsfWeight30ms[0], length);
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WEBRTC_SPL_MEMCPY_W16(syntdenum,lp,lp_length);
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WebRtcIlbcfix_BwExpand(weightdenum, lp, (int16_t*)WebRtcIlbcfix_kLpcChirpSyntDenum, (int16_t)lp_length);
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/* subframes 2 to 6: interpolation between first and last LSF */
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pos = lp_length;
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for (i = 1; i < 6; i++) {
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WebRtcIlbcfix_LspInterpolate2PolyDec(lp, lsfdeq, lsfdeq2,
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WebRtcIlbcfix_kLsfWeight30ms[i], length);
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WEBRTC_SPL_MEMCPY_W16(syntdenum + pos,lp,lp_length);
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WebRtcIlbcfix_BwExpand(weightdenum + pos, lp,
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(int16_t*)WebRtcIlbcfix_kLpcChirpSyntDenum, (int16_t)lp_length);
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pos += lp_length;
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}
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} else { /* iLBCdec_inst->mode=20 */
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/* subframes 1 to 4: interpolation between old and new LSF */
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pos = 0;
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for (i = 0; i < iLBCdec_inst->nsub; i++) {
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WebRtcIlbcfix_LspInterpolate2PolyDec(lp, iLBCdec_inst->lsfdeqold, lsfdeq,
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WebRtcIlbcfix_kLsfWeight20ms[i], length);
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WEBRTC_SPL_MEMCPY_W16(syntdenum+pos,lp,lp_length);
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WebRtcIlbcfix_BwExpand(weightdenum+pos, lp,
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(int16_t*)WebRtcIlbcfix_kLpcChirpSyntDenum, (int16_t)lp_length);
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pos += lp_length;
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}
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}
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/* update memory */
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if (iLBCdec_inst->mode==30) {
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WEBRTC_SPL_MEMCPY_W16(iLBCdec_inst->lsfdeqold, lsfdeq2, length);
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} else {
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WEBRTC_SPL_MEMCPY_W16(iLBCdec_inst->lsfdeqold, lsfdeq, length);
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}
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}
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