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08973eed36
WebRTC internal code should always used include paths that starts 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: I23fb4fed0c27a4d98bea360315b959af843587bc Reviewed-on: https://webrtc-review.googlesource.com/46101 Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Cr-Commit-Position: refs/heads/master@{#21847}
49 lines
1.7 KiB
C
49 lines
1.7 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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* Contains the core loop function for the lattice filter AR routine
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* for iSAC codec.
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*
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*/
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#include "common_audio/signal_processing/include/signal_processing_library.h"
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#include "modules/audio_coding/codecs/isac/fix/source/settings.h"
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#include "typedefs.h" // NOLINT(build/include)
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/* Filter ar_g_Q0[] and ar_f_Q0[] through an AR filter with coefficients
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* cth_Q15[] and sth_Q15[].
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*/
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void WebRtcIsacfix_FilterArLoop(int16_t* ar_g_Q0, // Input samples
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int16_t* ar_f_Q0, // Input samples
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int16_t* cth_Q15, // Filter coefficients
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int16_t* sth_Q15, // Filter coefficients
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size_t order_coef) { // order of the filter
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int n = 0;
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for (n = 0; n < HALF_SUBFRAMELEN - 1; n++) {
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size_t k = 0;
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int16_t tmpAR = 0;
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int32_t tmp32 = 0;
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int32_t tmp32_2 = 0;
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tmpAR = ar_f_Q0[n + 1];
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for (k = order_coef; k > 0; k--) {
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tmp32 = (cth_Q15[k - 1] * tmpAR - sth_Q15[k - 1] * ar_g_Q0[k - 1] +
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16384) >> 15;
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tmp32_2 = (sth_Q15[k - 1] * tmpAR + cth_Q15[k - 1] * ar_g_Q0[k - 1] +
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16384) >> 15;
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tmpAR = (int16_t)WebRtcSpl_SatW32ToW16(tmp32);
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ar_g_Q0[k] = (int16_t)WebRtcSpl_SatW32ToW16(tmp32_2);
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}
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ar_f_Q0[n + 1] = tmpAR;
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ar_g_Q0[0] = tmpAR;
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}
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}
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