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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}
126 lines
3.7 KiB
C
126 lines
3.7 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_GetCbVec.c
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******************************************************************/
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#include "modules/audio_coding/codecs/ilbc/get_cd_vec.h"
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#include "modules/audio_coding/codecs/ilbc/defines.h"
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#include "modules/audio_coding/codecs/ilbc/constants.h"
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#include "modules/audio_coding/codecs/ilbc/create_augmented_vec.h"
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/*----------------------------------------------------------------*
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* Construct codebook vector for given index.
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*---------------------------------------------------------------*/
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bool WebRtcIlbcfix_GetCbVec(
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int16_t *cbvec, /* (o) Constructed codebook vector */
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int16_t *mem, /* (i) Codebook buffer */
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size_t index, /* (i) Codebook index */
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size_t lMem, /* (i) Length of codebook buffer */
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size_t cbveclen /* (i) Codebook vector length */
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){
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size_t k, base_size;
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size_t lag;
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/* Stack based */
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int16_t tempbuff2[SUBL+5];
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/* Determine size of codebook sections */
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base_size=lMem-cbveclen+1;
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if (cbveclen==SUBL) {
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base_size += cbveclen / 2;
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}
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/* No filter -> First codebook section */
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if (index<lMem-cbveclen+1) {
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/* first non-interpolated vectors */
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k=index+cbveclen;
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/* get vector */
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WEBRTC_SPL_MEMCPY_W16(cbvec, mem+lMem-k, cbveclen);
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} else if (index < base_size) {
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/* Calculate lag */
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k = (2 * (index - (lMem - cbveclen + 1))) + cbveclen;
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lag = k / 2;
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WebRtcIlbcfix_CreateAugmentedVec(lag, mem+lMem, cbvec);
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}
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/* Higher codebbok section based on filtering */
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else {
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size_t memIndTest;
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/* first non-interpolated vectors */
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if (index-base_size<lMem-cbveclen+1) {
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/* Set up filter memory, stuff zeros outside memory buffer */
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memIndTest = lMem-(index-base_size+cbveclen);
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WebRtcSpl_MemSetW16(mem-CB_HALFFILTERLEN, 0, CB_HALFFILTERLEN);
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WebRtcSpl_MemSetW16(mem+lMem, 0, CB_HALFFILTERLEN);
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/* do filtering to get the codebook vector */
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WebRtcSpl_FilterMAFastQ12(
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&mem[memIndTest+4], cbvec, (int16_t*)WebRtcIlbcfix_kCbFiltersRev,
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CB_FILTERLEN, cbveclen);
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}
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/* interpolated vectors */
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else {
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if (cbveclen < SUBL) {
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// We're going to fill in cbveclen + 5 elements of tempbuff2 in
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// WebRtcSpl_FilterMAFastQ12, less than the SUBL + 5 elements we'll be
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// using in WebRtcIlbcfix_CreateAugmentedVec. This error is caused by
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// bad values in |index| (which come from the encoded stream). Tell the
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// caller that things went south, and that the decoder state is now
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// corrupt (because it's half-way through an update that we can't
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// complete).
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return false;
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}
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/* Stuff zeros outside memory buffer */
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memIndTest = lMem-cbveclen-CB_FILTERLEN;
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WebRtcSpl_MemSetW16(mem+lMem, 0, CB_HALFFILTERLEN);
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/* do filtering */
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WebRtcSpl_FilterMAFastQ12(
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&mem[memIndTest+7], tempbuff2, (int16_t*)WebRtcIlbcfix_kCbFiltersRev,
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CB_FILTERLEN, cbveclen+5);
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/* Calculate lag index */
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lag = (cbveclen<<1)-20+index-base_size-lMem-1;
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WebRtcIlbcfix_CreateAugmentedVec(lag, tempbuff2+SUBL+5, cbvec);
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}
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}
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return true; // Success.
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}
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