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bb547203bf
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}
87 lines
2.5 KiB
C
87 lines
2.5 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_AbsQuantLoop.c
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******************************************************************/
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#include "defines.h"
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#include "constants.h"
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#include "sort_sq.h"
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void WebRtcIlbcfix_AbsQuantLoop(int16_t *syntOutIN, int16_t *in_weightedIN,
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int16_t *weightDenumIN, size_t *quantLenIN,
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int16_t *idxVecIN ) {
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size_t k1, k2;
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int16_t index;
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int32_t toQW32;
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int32_t toQ32;
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int16_t tmp16a;
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int16_t xq;
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int16_t *syntOut = syntOutIN;
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int16_t *in_weighted = in_weightedIN;
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int16_t *weightDenum = weightDenumIN;
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size_t *quantLen = quantLenIN;
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int16_t *idxVec = idxVecIN;
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for(k1=0;k1<2;k1++) {
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for(k2=0;k2<quantLen[k1];k2++){
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/* Filter to get the predicted value */
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WebRtcSpl_FilterARFastQ12(
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syntOut, syntOut,
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weightDenum, LPC_FILTERORDER+1, 1);
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/* the quantizer */
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toQW32 = (int32_t)(*in_weighted) - (int32_t)(*syntOut);
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toQ32 = (((int32_t)toQW32)<<2);
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if (toQ32 > 32767) {
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toQ32 = (int32_t) 32767;
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} else if (toQ32 < -32768) {
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toQ32 = (int32_t) -32768;
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}
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/* Quantize the state */
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if (toQW32<(-7577)) {
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/* To prevent negative overflow */
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index=0;
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} else if (toQW32>8151) {
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/* To prevent positive overflow */
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index=7;
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} else {
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/* Find the best quantization index
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(state_sq3Tbl is in Q13 and toQ is in Q11)
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*/
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WebRtcIlbcfix_SortSq(&xq, &index,
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(int16_t)toQ32,
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WebRtcIlbcfix_kStateSq3, 8);
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}
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/* Store selected index */
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(*idxVec++) = index;
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/* Compute decoded sample and update of the prediction filter */
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tmp16a = ((WebRtcIlbcfix_kStateSq3[index] + 2 ) >> 2);
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*syntOut = (int16_t) (tmp16a + (int32_t)(*in_weighted) - toQW32);
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syntOut++; in_weighted++;
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}
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/* Update perceptual weighting filter at subframe border */
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weightDenum += 11;
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}
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}
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